HDF5 History
============

This file contains development history of HDF5 1.8 branch

23.      Release Information for hdf5-1.8.21
22.      Release Information for hdf5-1.8.20
21.      Release Information for hdf5-1.8.19
20.      Release Information for hdf5-1.8.18
19.      Release Information for hdf5-1.8.17
18.      Release Information for hdf5-1.8.16
17.      Release Information for hdf5-1.8.15
16.      Release Information for hdf5-1.8.14
15.      Release Information for hdf5-1.8.13
14.      Release Information for hdf5-1.8.12
13.      Release Information for hdf5-1.8.11
12.      Release Information for hdf5-1.8.10-patch1
11.      Release Information for hdf5-1.8.10
10.      Release Information for hdf5-1.8.9
09.      Release Information for hdf5-1.8.8
08.      Release Information for hdf5-1.8.7
07.      Release Information for hdf5-1.8.6
06.      Release Information for hdf5-1.8.5
05.      Release Information for hdf5-1.8.4
04.      Release Information for hdf5-1.8.3
03.      Release Information for hdf5-1.8.2
02.      Release Information for hdf5-1.8.1
01.      Release Information for hdf5-1.8.0

[Search on the string '%%%%' for section breaks of each release.]

%%%%1.8.21%%%%


HDF5 version 1.8.21 released on 2018-06-04
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.20 and
HDF5-1.8.21, and contains information on the platforms tested and
known problems in HDF5-1.8.21.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.21 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     https://support.hdfgroup.org/HDF5/

The HDF5 1.8.21 release can be obtained from:

     https://support.hdfgroup.org/HDF5/release/obtain518.html

User documentation for 1.8.21 can be accessed directly at this location:

     https://support.hdfgroup.org/HDF5/doc1.8/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     https://support.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.21 (current
release) versus Release 1.8.20

     https://support.hdfgroup.org/HDF5/doc1.8/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.20
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Configuration
    -------------
    - CMake

      Change minimum version to 3.10.

      This change removes the need to support a copy of the FindMPI.cmake module,
      which has been removed, along with its subfolder in the config/cmake_ext_mod
      location.

      (ADB - 2018/03/09)

    - CMake

      Add pkg-config file generation

      Added pkg-config file generation for the C, C++, HL, and HL C++ libraries.
      In addition, builds on linux will create h5cXXX scripts that use the pkg-config
      files. This is a limited implementation of a script like autotools h5cc.

      (ADB - 2018/03/08, HDFFV-4359)

    - CMake

      Refactor use of CMAKE_BUILD_TYPE for new variable, which understands
      the type of generator in use.

      Added new configuration macros to use new HDF_BUILD_TYPE variable. This
      variable is set correctly for the type of generator being used for the build.

      (ADB - 2018/01/08, HDFFV-10385, HDFFV-10296)

    C++ API
    -------
    - The following C++ API wrappers have been added to class H5Location
      + H5Lcreate_soft:
        // Creates a soft link from link_name to target_name.
        void link(const char *target_name, const char *link_name,...)
        void link(const H5std_string& target_name,...)

      + H5Lcreate_hard:
        // Creates a hard link from new_name to curr_name.
        void link(const char *curr_name, const Group& new_loc,...)
        void link(const H5std_string& curr_name, const Group& new_loc,...)

        // Creates a hard link from new_name to curr_name in the same location.
        void link(const char *curr_name, const hid_t same_loc,...)
        void link(const H5std_string& curr_name, const hid_t same_loc,...)

        Note: previous version CommonFG::link will be deprecated.

      + H5Lcopy:
        // Copy an object from a group of file to another.
        void copyLink(const char *src_name, const Group& dst,...)
        void copyLink(const H5std_string& src_name, const Group& dst,...)

        // Copy an object from a group of file to the same location.
        void copyLink(const char *src_name, const char *dst_name,...)
        void copyLink(const H5std_string& src_name,...)

      + H5Lmove:
        // Rename an object in a group or file to a new location.
        void moveLink(const char* src_name, const Group& dst,...)
        void moveLink(const H5std_string& src_name, const Group& dst,...)

        // Rename an object in a group or file to the same location.
        void moveLink(const char* src_name, const char* dst_name,...)
        void moveLink(const H5std_string& src_name,...)

        Note: previous version CommonFG::move will be deprecated.

      + H5Ldelete:
        // Removes the specified link from this location.
        void unlink(const char *link_name,
            const LinkAccPropList& lapl = LinkAccPropList::DEFAULT)
        void unlink(const H5std_string& link_name,
            const LinkAccPropList& lapl = LinkAccPropList::DEFAULT)

        Note: An additional parameter is added to CommonFG::unlink and it
              is moved to H5Location.

      (BMR - 2018/05/11 - HDFFV-10445)

    - New property list subclasses

      Property list subclasses StrCreatPropList, LinkCreatPropList, and
      AttrCreatPropList are added for the C property list classes
      H5P_STRING_CREATE, H5P_LINK_CREATE, and H5P_ATTRIBUTE_CREATE.

      (BMR - 2018/05/11 - HDFFV-10445)

    - Another argument, LinkCreatPropList& lcpl, is added to the following
      functions for the use of link creation property list.
        Group createGroup(const char* name, size_t size_hint = 0,
                    const LinkCreatPropList& lcpl = LinkCreatPropList::DEFAULT)
        Group createGroup(const H5std_string& name, size_t size_hint = 0,
                    const LinkCreatPropList& lcpl = LinkCreatPropList::DEFAULT)

      (BMR - 2018/05/11 - HDFFV-10445)



Support for New Platforms, Languages, and Compilers
===================================================

    - Added support for Visual Studio 2017 w/ Intel Fortran 18 on Windows 10 x64.


Bug Fixes since HDF5-1.8.20
===========================

    - If an HDF5 file contains a filter pipeline message with a 'number of
      filters' field that exceeds the maximum number of allowed filters,
      the error handling code will attempt to dereference a NULL pointer.

      This issue was reported to The HDF Group as issue #CVE-2017-17505.

      NOTE: The HDF5 C library cannot produce such a file. This condition
            should only occur in a corrupt (or deliberately altered) file
            or a file created by third-party software.

      This problem arose because the error handling code assumed that
      the 'number of filters' field implied that a dynamic array of that
      size had already been created and that the cleanup code should
      iterate over that array and clean up each element's resources. If
      an error occurred before the array has been allocated, this will
      not be true.

      This has been changed so that the number of filters is set to
      zero on errors. Additionally, the filter array traversal in the
      error handling code now requires that the filter array not be NULL.

      (DER - 2018/02/06, HDFFV-10354)

    - If an HDF5 file contains a filter pipeline message which contains
      a 'number of filters' field that exceeds the actual number of
      filters in the message, the HDF5 C library will read off the end of
      the read buffer.

      This issue was reported to The HDF Group as issue #CVE-2017-17506.

      NOTE: The HDF5 C library cannot produce such a file. This condition
            should only occur in a corrupt (or deliberately altered) file
            or a file created by third-party software.

      The problem was fixed by passing the buffer size with the buffer
      and ensuring that the pointer cannot be incremented off the end
      of the buffer. A mismatch between the number of filters declared
      and the actual number of filters will now invoke normal HDF5
      error handling.

      (DER - 2018/02/26, HDFFV-10355)

    - If an HDF5 file contains a malformed compound datatype with a
      suitably large offset, the type conversion code can run off
      the end of the type conversion buffer, causing a segmentation
      fault.

      This issue was reported to The HDF Group as issue #CVE-2017-17507.

      NOTE: The HDF5 C library cannot produce such a file. This condition
            should only occur in a corrupt (or deliberately altered) file
            or a file created by third-party software.

      THE HDF GROUP WILL NOT FIX THIS BUG AT THIS TIME

      Fixing this problem would involve updating the publicly visible
      H5T_conv_t function pointer typedef and versioning the API calls
      which use it. We normally only modify the public API during
      major releases, so this bug will not be fixed at this time.

      (DER - 2018/02/26, HDFFV-10356)

    - If an HDF5 file contains a malformed compound type which contains
      a member of size zero, a division by zero error will occur while
      processing the type.

      This issue was reported to The HDF Group as issue #CVE-2017-17508.

      NOTE: The HDF5 C library cannot produce such a file. This condition
            should only occur in a corrupt (or deliberately altered) file
            or a file created by third-party software.

      Checking for zero before dividing fixes the problem. Instead of the
      division by zero, the normal HDF5 error handling is invoked.

      (DER - 2018/02/26, HDFFV-10357)

    - If an HDF5 file contains a malformed symbol table node that declares
      it contains more symbols than it actually contains, the library
      can run off the end of the metadata cache buffer while processing
      the symbol table node.

      This issue was reported to The HDF Group as issue #CVE-2017-17509.

      NOTE: The HDF5 C library cannot produce such a file. This condition
            should only occur in a corrupt (or deliberately altered) file
            or a file created by third-party software.

      Performing bounds checks on the buffer while processing fixes the
      problem. Instead of the segmentation fault, the normal HDF5 error
      handling is invoked.

      (DER - 2018/03/12, HDFFV-10358)


    Configuration
    -------------
    - Library

      Moved the location of gcc attribute.

      The gcc attribute(no_sanitize), named as the macro HDF_NO_UBSAN,
      was located after the function name. Builds with GCC 7 did not
      indicate any problem, but GCC 8 issued errors. Moved the
      attribute before the function name, as required.

      (ADB 2018/05/22, HDFFV-10473)

    - CMake

      Update CMake commands configuration.

      A number of improvements were made to the CMake commands. Most
      changes simplify usage or eliminate unused constructs. Also,
      some changes support better cross-platform support.

      (ADB - 2018/02/01, HDFFV-10398)

    - CMake

      Correct usage of CMAKE_BUILD_TYPE variable.

      The use of the CMAKE_BUILD_TYPE is incorrect for multi-config
      generators (Visual Studio and XCode) and is optional for single
      config generators. Created a new macro to check
        GLOBAL PROPERTY -> GENERATOR_IS_MULTI_CONFIG
      Created two new HDF variable, HDF_BUILD_TYPE and HDF_CFG_BUILD_TYPE.
      Defaults for these variables is "Release".

      (ADB - 2018/01/10, HDFFV-10385)

    - CMake

      Add replacement of fortran flags if using static CRT.

      Added TARGET_STATIC_CRT_FLAGS call to HDFUseFortran.cmake file in
      config/cmake_ext_mod folder.

      (ADB - 2018/01/08, HDFFV-10334)


    Library
    -------
    - Utility function can not handle lowercase Windows drive letters

      Added call to toupper function for drive letter.

      (ADB - 2017/12/18, HDFFV-10307)


    Tools
    -----
    - h5repack

      h5repack changes the chunk parameters when a change of layout is not
      specified and a filter is applied.

      HDFFV-10297, HDFFV-10319 reworked code for h5repack and h5diff code
      in the tools library. The check for an existing layout was incorrectly
      placed into an if block and not executed. The check was moved into
      the normal path of the function.

      (ADB - 2018/02/21, HDFFV-10412)

    - h5dump

      the tools library will hide the error stack during file open.

      While this is preferable almost always, there are reasons to enable
      display of the error stack when a tool will not open a file. Adding an
      optional argument to the --enable-error-stack will provide this use case.
      As an optional argument it will not affect the operation of the
      --enable-error-stack. h5dump is the only tool to implement this change.

      (ADB - 2018/02/15, HDFFV-10384)

    - h5dump

      h5dump would output an indented blank line in the filters section.

      h5dump overused the h5tools_simple_prefix function, which is a
      function intended to account for the data index (x,y,z) option.
      Removed the function call for header information.

      (ADB - 2018/01/25, HDFFV-10396)

    - h5repack

      h5repack incorrectly searched internal object table for name.

      h5repack would search the table of objects for a name, if the
      name did not match it tried to determine if the name without a
      leading slash would match. The logic was flawed! The table
      stored names(paths) without a leading slash and did a strstr
      of the table path to the name.
      The assumption was that if there was a difference of one then
      it was a match, however "pressure" would match "/pressure" as
      well as "/pressure1", "/pressure2", etc. Changed logic to remove
      any leading slash and then do a full compare of the name.

      (ADB - 2018/01/18, HDFFV-10393)

    - h5repack

      h5repack failed to handle command line parameters for customer filters.

      User defined filter parameter conversions would fail when integers
      were represented on the command line with character strings
      larger than 9 characters. Increased local variable array for storing
      the current command line parameter to prevent buffer overflows.

      (ADB - 2018/01/17, HDFFV-10392)

    - h5diff

      h5diff seg faulted if comparing VL strings against fixed strings.

      Reworked solution for HDFFV-8625 and HDFFV-8639. Implemented the check
      for string objects of same type in the diff_can_type function by
      adding an if(tclass1 == H5T_STRING) block. This "if block" moves the
      same check that was added for attributes to this function, which is
      used by all object types. This function handles complex type structures.
      Also added a new test file in h5diffgentest for testing this issue
      and removed the temporary files used in the test scripts.

      (ADB - 2018/01/04, HDFFV-8745)


    C++ API
    -------
    - Removal of memory leaks

      A private function was inadvertently called, causing memory leaks.  This
      is now fixed.

      (BMR - 2018/04/12 - User reported in email)

    - Changes in exception classes

      Some exception classes are reorganized to reflect the HDF5 object
      hierarchy and allow customization.
        DataSetIException -> LocationException -> Exception
        DataTypeIException -> LocationException -> Exception
        GroupIException -> LocationException -> Exception
        AttributeIException -> LocationException -> Exception
        FileIException -> GroupIException -> LocationException -> Exception
      Member functions in H5Location and H5Object now throw specific exceptions
      associated with the invoking objects.

      (BMR - 2018/05/11)

    - H5Location::closeObjId is made static
      (BMR - 2018/05/11)

    - H5A wrappers in H5Location are removed as they have been in H5Object.
      (BMR - 2018/05/11)


Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    Linux 2.6.32-573.22.1.el6     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus/mayll)              Version 4.4.7 20120313
                                     Versions 4.9.3, 5.3.0, 6.2.0
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 17.10-0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 17.0.4.196 Build 20160721
                                  MPICH 3.1.4 compiled with GCC 4.9.3
                                  OpenMPI 2.0.1 compiled with GCC 4.9.3

    Linux 2.6.32-573.18.1.el6     gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
                                  IBM XL C/C++ V13.1
                                  IBM XL Fortran V15.1

    Linux 3.10.0-327.10.1.el7     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (kituo/moohan/jelly           Version 4.8.5 20150623 (Red Hat 4.8.5-4)
                                     Versions 4.9.3, 5.3.0, 6.2.0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 17.0.4.196 Build 20170411
                                  MPICH 3.1.4 compiled with GCC 4.9.3
                                  NAG Fortran Compiler Release 6.1(Tozai) Build 6116

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc

    Windows 7                     Visual Studio 2015 w/ Intel Fortran 16 (cmake)

    Windows 7 x64                 Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015 w/ Intel Fortran 16 (cmake)
                                  Visual Studio 2015 w/ Intel C, Fortran 2017 (cmake)
                                  Visual Studio 2015 w/ MSMPI 8 (cmake)

    Windows 10                    Visual Studio 2015 w/ Intel Fortran 16 (cmake)

    Windows 10 x64                Visual Studio 2015 w/ Intel Fortran 16 (cmake)
                                  Visual Studio 2017 w/ Intel Fortran 18 (cmake)

    Mac OS X Mavericks 10.9.5     Apple LLVM version 6.0 (clang-600.0.57)
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (wren/quail)                  Intel icc/icpc/ifort version 15.0.3

    Mac OS X Yosemite 10.10.5     Apple LLVM version 6.1 (clang-602.0.53)
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (osx1010dev/osx1010test)      Intel icc/icpc/ifort version 15.0.3

    Mac OS X El Capitan 10.11.6   Apple LLVM version 7.3.0 (clang-703.0.29)
    64-bit                        gfortran GNU Fortran (GCC) 5.2.0
    (VM osx1011dev/osx1011test)   Intel icc/icpc/ifort version 16.0.2

    Mac OS Sierra 10.12.6         Apple LLVM version 8.1 (clang-802.0.42)
    64-bit                        gfortran GNU Fortran (GCC) 7.1.0
    (kite)                        Intel icc/icpc/ifort version 17.0.2


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
SunOS 5.11 32-bit                       n        y/y    n        y    y     y
SunOS 5.11 64-bit                       n        y/y    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/n    n        y    y     y
Windows 7 x64 Cygwin                    n        y/n    n        y    y     y
Windows 10                              y        y/y    n        y    y     y
Windows 10 x64                          y        y/y    n        y    y     y
Mac OS X Yosemite 10.10.5 64-bit        n        y/y    n        y    y     y
Mac OS X El Capitan 10.11.6 64-bit      n        y/y    n        y    y     y
Mac OS Sierra 10.12.6 64-bit            n        y/y    n        y    y     y
AIX 6.1 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 GNU      y        y/y    y        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 PGI      n        y/y    n        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 GNU      y        y/y    y        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 Intel    n        y/y    n        y    y     y
Linux 2.6.32-573.18.1.el6.ppc64         n        y/n    n        y    y     y

Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
SunOS 5.11 32-bit                          y       y         y         y
SunOS 5.11 64-bit                          y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 7 x64 Cygwin                       n       n         n         y
Windows 10                                 y       y         y         y
Windows 10 x64                             y       y         y         y
Mac OS X Yosemite 10.10.5 64-bit           y       n         y         y
Mac OS X El Capitan 10.11.6 64-bit         y       n         y         y
Mac OS Sierra 10.12.6 64-bit               y       n         y         y
AIX 6.1 32- and 64-bit                     y       n         n         y
CentOS 6.7 Linux 2.6.32 x86_64 GNU         y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 Intel       y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 PGI         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 GNU         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 Intel       y       y         y         y
Linux 2.6.32-573.18.1.el6.ppc64            y       y         y         y

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.32-573.22.1.el6     g95 (GCC 4.0.3 (g95 0.94!)
    #1 SMP x86_64 GNU/Linux
    (mayll)

    Debian8.4.0 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1 x86_64 GNU/Linux
                                  gcc (Debian 4.9.2-10) 4.9.2
                                  GNU Fortran (Debian 4.9.2-10) 4.9.2
                                  (cmake and autotools)

    Fedora24 4.7.2-201.fc24.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 6.1.1 20160621 (Red Hat 6.1.1-3)
                                  GNU Fortran (GCC) 6.1.1 20160621 (Red Hat 6.1.1-3)
                                  (cmake and autotools)

    CentOS 7.2 3.10.0-327.28.2.el7.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
                                  GNU Fortran (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
                                  (cmake and autotools)

    Ubuntu 16.04 4.4.0-38-generic #62-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu 5.4.0-6ubuntu1~16.04.2) 5.4.0
                                  GNU Fortran (Ubuntu 5.4.0-6ubuntu1~16.04.2) 5.4.0
                                  (cmake and autotools)


Known Problems
==============

    The dynamically loaded plugin test libraries require undefined references
    to HDF5 functions to be resolved at runtime in order to function properly.
    With autotools on CYGWIN this results in build errors, and we have not
    found a solution that satisfies both.  Therefore the dynamically loaded
    plugin tests have been disabled on CYGWIN.

    Mac OS X 10.13 added additional subdirectory structure in .libs for shared
    libraries.  Consequently "make check" will fail testing java and dynamically
    loaded plugin test libraries attempting to copy files from the previous
    locations in .libs directories.  This will be addressed in the next release
    when support for the Mac OS X 10.13 platform is added.

    Known problems in previous releases can be found in the HISTORY*.txt files
    in the HDF5 source. Please report any new problems found to
    help@hdfgroup.org.


%%%%1.8.20%%%%


HDF5 version 1.8.20 released on 2017-11-28
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.19 and
HDF5-1.8.20, and contains information on the platforms tested and
known problems in HDF5-1.8.20.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.20 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     https://support.hdfgroup.org/HDF5/

The HDF5 1.8.20 release can be obtained from:

     https://support.hdfgroup.org/HDF5/release/obtain518.html

User documentation for 1.8.20 can be accessed directly at this location:

     https://support.hdfgroup.org/HDF5/doc1.8/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     https://support.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.20 (current
release) versus Release 1.8.19

     https://support.hdfgroup.org/HDF5/doc1.8/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.20
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Tools
    -----
    - h5diff

      h5diff has new option enable-error-stack.

      Updated h5diff with the --enable-error-stack argument, which
      enables the display of the hdf5 error stack. This completes the
      improvement to the main tools; h5copy, h5diff, h5dump, h5ls and
      h5repack.

      (ADB - 2017/08/30, HDFFV-9774)


    C++ API
    -------
    - The following C++ API wrappers have been added to the C++ Library:

        // Creates a binary object description of this datatype.
        void DataType::encode() - C API H5Tencode()

        // Returns the decoded type from the binary object description.
        DataType::decode() - C API H5Tdecode()
        ArrayType::decode() - C API H5Tdecode()
        CompType::decode() - C API H5Tdecode()
        DataType::decode() - C API H5Tdecode()
        EnumType::decode() - C API H5Tdecode()
        FloatType::decode() - C API H5Tdecode()
        IntType::decode() - C API H5Tdecode()
        StrType::decode() - C API H5Tdecode()
        VarLenType::decode() - C API H5Tdecode()

        // Three overloaded functions to retrieve information about an object
        H5Location::getObjectInfo() - H5Oget_info()/H5Oget_info_by_name()

      (BMR - 2017/10/17, HDFFV-10175)

    - New constructors to open existing datatypes added in ArrayType,
      CompType, DataType, EnumType, FloatType, IntType, StrType, and
      VarLenType.

      (BMR - 2017/10/17, HDFFV-10175)

    - A document is added to the HDF5 C++ API Reference Manual to show the
      mapping from a C API to C++ wrappers.  It can be found from the main
      page of the C++ API Reference Manual.

      (BMR - 2017/10/17, HDFFV-10151)


    High-Level APIs
    ---------------
    - H5DOread_chunk

      Users wanted to read compressed data directly from a file without any
      processing by the HDF5 data transfer pipeline, just as they were able
      to write it directly to a file with H5DOwrite_chunk.

      New API function, corresponding to existing function H5DOwrite_chunk.
      H5DOread_chunk reads a raw data chunk directly from a chunked dataset
      in the file into the application buffer, bypassing the library’s internal
      data transfer pipeline, including filters.

      (VC - 2017/05/02, HDFFV-9934)


Support for New Platforms, Languages, and Compilers
===================================================

    - Added NAG compiler


Bug Fixes since HDF5-1.8.19
===========================

    Configuration
    -------------
    - cmake

      The hdf5 library used shared szip and zlib, which needlessly required
      applications to link with the same szip and zlib libraries.

      Changed the target_link_libraries commands to use the static libs.
      Removed improper link duplication of szip and zlib.
      Adjusted the link dependencies and the link interface values of
      the target_link_libraries commands.

      (ADB - 2017/11/14, HDFFV-10329)

    - cmake MPI

      CMake implementation for MPI was problematic and would create incorrect
      MPI library references in the hdf5 libraries.

      Reworked the CMake MPI code to properly create CMake targets.Also merged
      the latest CMake FindMPI.cmake changes to the local copy. This is necessary
      until HDF changes the CMake minimum to 3.9 or greater.

      (ADB - 2017/11/02, HDFFV-10321)


    - Fixed Fortran linker flags when using the NAG Fortran compiler (autotools).

      (HDFFV-10037, MSB, 2017/10/21)

    - cmake

      Too many commands for POST_BUILD step caused command line to be
      too big on windows.

      Changed foreach of copy command to use a custom command with the
      use of the HDFTEST_COPY_FILE macro.

      (ADB - 2017/07/12, HDFFV-10254)


    Library
    -------
    - filter plugin handling in H5PL.c and H5Z.c

      It was discovered that the dynamic loading process used by
      filter plugins had issues with library dependencies.

      CMake build process changed to use LINK INTERFACE keywords, which
      allowed HDF5 C library to make dependent libraries private. The
      filter plugin libraries no longer require dependent libraries
      (such as szip or zlib) to be available.
             (ADB - 2017/11/16, HDFFV-10328)

    - Fix rare object header corruption bug

      In certain cases, such as when converting large attributes to dense
      storage, an error could occur which would either fail an assertion or
      cause file corruption. Fixed and added test.

      (NAF - 2017/11/14, HDFFV-10274)

    - H5Zfilter_avail in H5Z.c

      The public function checked for plugins, while the private
      function did not.

      Modified H5Zfilter_avail and private function, H5Z_filter_avail.
      Moved check for plugin from public to private function. Updated
      H5P__set_filter due to change in H5Z_filter_avail. Updated tests.

      (ADB - 2017/10/10, HDFFV-10297, HDFFV-10319)

    - Fix H5Sencode bug when num points selected is >2^32

      Modified to fail if the 32 bit limit is exceeded when encoding either
      offsets or counts in the selection.

      (HDFFV-10323, VC, 2017/09/07)

    - Fix H5HL_offset_into()

      (1) Fix H5HL_offset_into() to return error when offset exceeds heap data
          block size.
      (2) Fix other places in the library that call this routine to detect
          error routine.

      (HDFFV-10216, VC, 2017/09/05)


    Tools
    -----
    - h5repack

      h5repack failed to copy a dataset with existing filter.

      Reworked code for h5repack and h5diff code in tools library. Added
      improved error handling, cleanup of resources and checks of calls.
      Modified H5Zfilter_avail and private function, H5Z_filter_avail.
      Moved check for plugin from public to private function. Updated
      H5P__set_filter due to change in H5Z_filter_avail. Updated tests.
      Note, h5repack output display has changed to clarify the individual
      steps of the repack process. The output indicates if an operation
      applies to all objects. Lines with notation and no information
      have been removed.

      (ADB - 2017/10/10, HDFFV-10297, HDFFV-10319)

    - h5repack

      h5repack always set the User Defined filter flag to H5Z_FLAG_MANDATORY.

      Added another parameter to the 'UD=' option to set the flag by default
      to '0' or H5Z_FLAG_MANDATORY, the other choice is '1' or H5Z_FLAG_OPTIONAL.

      (ADB - 2017/08/31, HDFFV-10269)

    - h5ls

      h5ls generated error on stack when it encountered a H5S_NULL
      dataspace.

      Adding checks for H5S_NULL before calling H5Sis_simple (located
      in the h5tools_dump_mem function) fixed the issue.

      (ADB - 2017/08/17, HDFFV-10188)

    - h5dump

      h5dump segfaulted on output of XML file.

      Function that escape'd strings used the full buffer length
      instead of just the length of the replacement string in a
      strncpy call. Using the correct length fixed the issue.

      (ADB - 2017/08/01, HDFFV-10256)

    - h5diff

      h5diff segfaulted on compare of a  NULL variable length string.

      Improved h5diff compare of strings by adding a check for
      NULL strings and setting the lengths to zero.

      (ADB - 2017/07/25, HDFFV-10246)

    - h5import

      h5import crashed trying to import data from a subset of a dataset.

      Improved h5import by adding the SUBSET keyword. h5import understands
      to use the Count times the Block as the size of the dimensions.
      Added INPUT_B_ORDER keyword to old-style configuration files.
      The import from h5dump function expects the binary files to use native
      types (FILE '-b' option) in the binary file.

      (ADB - 2017/06/15, HDFFV-10219)


    C++ API
    -------
    - Marked the following functions deprecated because they were moved to
      class H5Object:
        H5Location::createAttribute()
        H5Location::openAttribute()
        H5Location::attrExists()
        H5Location::removeAttr()
        H5Location::renameAttr()
        H5Location::getNumAttrs()

      (BMR - 2017/10/17)


Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    Linux 2.6.32-573.22.1.el6     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus/mayll)              Version 4.4.7 20120313
                                     Versions 4.9.3, 5.3.0, 6.2.0
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 16.10-0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 17.0.0.196 Build 20160721
                                  MPICH 3.1.4 compiled with GCC 4.9.3
                                  OpenMPI 2.0.1 compiled with GCC 4.9.3

    Linux 2.6.32-573.18.1.el6     gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
                                  IBM XL C/C++ V13.1
                                  IBM XL Fortran V15.1

    Linux 3.10.0-327.10.1.el7     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (kituo/moohan/jelly           Version 4.8.5 20150623 (Red Hat 4.8.5-4)
                                     Versions 4.9.3, 5.3.0, 6.2.0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 17.0.4.196 Build 20170411
                                  MPICH 3.1.4 compiled with GCC 4.9.3
                                  NAG Fortran Compiler Release 6.1(Tozai) Build 6116

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc

    Windows 7                     Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015 w/ Intel Fortran 16 (cmake)

    Windows 7 x64                 Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015 w/ Intel Fortran 16 (cmake)
                                  Visual Studio 2015 w/ Intel C, Fortran 2017 (cmake)
                                  Visual Studio 2015 w/ MSMPI 8 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 2.8.0(0.309/5/3)
                                      gcc and gfortran compilers (GCC 5.4.0)
                                      (cmake and autotools)

    Windows 10                    Visual Studio 2015 w/ Intel Fortran 16 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 2.8.0(0.309/5/3)
                                      gcc and gfortran compilers (GCC 5.4.0)
                                      (cmake and autotools)

    Windows 10 x64                Visual Studio 2015 w/ Intel Fortran 16 (cmake)

    Mac OS X Mavericks 10.9.5     Apple LLVM version 6.0 (clang-600.0.57)
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (wren/quail)                  Intel icc/icpc/ifort version 15.0.3

    Mac OS X Yosemite 10.10.5     Apple LLVM version 6.1 (clang-602.0.53)
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (osx1010dev/osx1010test)      Intel icc/icpc/ifort version 15.0.3

    Mac OS X El Capitan 10.11.6   Apple LLVM version 7.3.0 (clang-703.0.29)
    64-bit                        gfortran GNU Fortran (GCC) 5.2.0
    (VM osx1011dev/osx1011test)   Intel icc/icpc/ifort version 16.0.2

    Mac OS Sierra 10.12.6         Apple LLVM version 8.1 (clang-802.0.42)
    64-bit                        gfortran GNU Fortran (GCC) 7.1.0
    (kite)                        Intel icc/icpc/ifort version 17.0.2

Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
SunOS 5.11 32-bit                       n        y/y    n        y    y     y
SunOS 5.11 64-bit                       n        y/y    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/n    n        y    y     y
Windows 7 x64 Cygwin                    n        y/n    n        y    y     y
Windows 10                              y        y/y    n        y    y     y
Windows 10 x64                          y        y/y    n        y    y     y
Mac OS X Mavericks 10.9.5 64-bit        n        y/y    n        y    y     y
Mac OS X Yosemite 10.10.5 64-bit        n        y/y    n        y    y     y
Mac OS X El Capitan 10.11.6 64-bit      n        y/y    n        y    y     y
Mac OS Sierra 10.12.6 64-bit            n        y/y    n        y    y     y
AIX 6.1 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 GNU      y        y/y    y        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 PGI      n        y/y    n        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 GNU      y        y/y    y        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 Intel    n        y/y    n        y    y     y
Linux 2.6.32-431.11.2.el6.ppc64         n        y/n    n        y    y     y

Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
SunOS 5.11 32-bit                          y       y         y         y
SunOS 5.11 64-bit                          y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 7 x64 Cygwin                       n       n         n         y
Windows 10                                 y       y         y         y
Windows 10 x64                             y       y         y         y
Mac OS X Mavericks 10.9.5 64-bit           y       n         y         y
Mac OS X Yosemite 10.10.5 64-bit           y       n         y         y
Mac OS X El Capitan 10.11.6 64-bit         y       n         y         y
Mac OS Sierra 10.12.6 64-bit               y       n         y         y
AIX 6.1 32- and 64-bit                     y       n         n         y
CentOS 6.7 Linux 2.6.32 x86_64 GNU         y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 Intel       y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 PGI         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 GNU         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 Intel       y       y         y         y
Linux 2.6.32-431.11.2.el6.ppc64            y       y         y         y

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.32-573.22.1.el6     g95 (GCC 4.0.3 (g95 0.94!)
    #1 SMP x86_64 GNU/Linux
    (mayll)

    Debian8.4.0 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1 x86_64 GNU/Linux
                                  gcc (Debian 4.9.2-10) 4.9.2
                                  GNU Fortran (Debian 4.9.2-10) 4.9.2
                                  (cmake and autotools)

    Fedora24 4.7.2-201.fc24.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 6.1.1 20160621 (Red Hat 6.1.1-3)
                                  GNU Fortran (GCC) 6.1.1 20160621 (Red Hat 6.1.1-3)
                                  (cmake and autotools)

    CentOS 7.2 3.10.0-327.28.2.el7.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
                                  GNU Fortran (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
                                  (cmake and autotools)

    Ubuntu 16.04 4.4.0-38-generic #62-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu 5.4.0-6ubuntu1~16.04.2) 5.4.0
                                  GNU Fortran (Ubuntu 5.4.0-6ubuntu1~16.04.2) 5.4.0
                                  (cmake and autotools)


Known Problems
==============

    The dynamically loaded plugin test libraries require undefined references
    to HDF5 functions to be resolved at runtime in order to function properly.
    With autotools on CYGWIN this results in build errors, and we have not
    found a solution that satisfies both.  Therefore the dynamically loaded
    plugin tests have been disabled on CYGWIN.

    Mac OS X 10.13 added additional subdirectory structure in .libs for shared
    libraries.  Consequently "make check" will fail testing java and dynamically
    loaded plugin test libraries attempting to copy files from the previous
    locations in .libs directories.  This will be addressed in the next release
    when support for the Mac OS X 10.13 platform is added.

    Known problems in previous releases can be found in the HISTORY*.txt files
    in the HDF5 source. Please report any new problems found to
    help@hdfgroup.org.


%%%%1.8.19%%%%


HDF5 version 1.8.19 released on 2017-06-15
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.18 and
HDF5-1.8.19, and contains information on the platforms tested and
known problems in HDF5-1.8.19.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.19 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     https://support.hdfgroup.org/HDF5/

The HDF5 1.8.19 release can be obtained from:

     https://support.hdfgroup.org/HDF5/release/obtain518.html

User documentation for 1.8.19 can be accessed directly at this location:

     https://support.hdfgroup.org/HDF5/doc1.8/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     https://support.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.19 (current
release) versus Release 1.8.18

     https://support.hdfgroup.org/HDF5/doc1.8/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.19
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Configuration
    --------------
    - CMake in the Tools

      User-defined filters on Windows require that tools be built
      with shared libraries.

      CMake command code added to build tools with
      shared libraries as well as with static libraries.

      (ADB - 2017/02/07, HDFFV-10123)


    Library
    -------
    - H5PL package

      Users would like to be able to set the plugin path programmatically
      instead of through the environment variable.

      H5PL package obtained new APIs for manipulating the entries of
      the plugin path table. The new APIs are;
        H5PLappend  - Insert a plugin path at the end of the list.
        H5PLprepend - Insert a plugin path at the beginning of the list.
        H5PLreplace - Replace the path at the specified index.
        H5PLinsert  - Insert a plugin path at the specified index, moving
                      other paths after the index.
        H5PLremove  - Remove the plugin path at the specified index and
                      compacting the list.
        H5PLget     - Query the plugin path at the specified index.
        H5PLsize    - Query the size of the current list of plugin paths.

      (ADB - 2017/04/04, HDFFV-10143)

    - H5Dget_chunk_storage_size

      The storage size of a chunk in the file is needed to determine the size
      of the buffer to be allocated for reading a chunk directly from a file.

      New API function gets the size in bytes currently allocated within a
      file for a raw data chunk in a dataset.  This function was added to get
      the chunk size in support of the implementation of H5DOread_chunks, but
      may also be useful for other purposes.

      (VC - 2017/05/02, HDFFV-9934)

    C++ API
    -------
    - The following C++ API wrappers have been added to the C++ Library:
        // Determines if a name exists.
        H5Location::nameExists() - C API H5Lexists()

        // Checks if an ID is valid.
        IdComponent::isValid() - C API H5Iis_valid()

        // Sets the number of soft or user-defined links that can be
        // traversed before a failure occurs.
        LinkAccPropList::setNumLinks() - C API H5Pset_nlinks()

        // Gets the number of soft or user-defined link traversals allowed
        LinkAccPropList::getNumLinks() - C API H5Pget_nlinks()

        // Returns a copy of the creation property list of a datatype.
        DataType::getCreatePlist() - C API H5Tget_create_plist()

        // Opens an object within a location, regardless its type.
        H5Location::openObjId() - C API H5Oopen()
        H5Location::openObjId() - C API H5Oopen()

        // Closes an object opened by openObjId().
        H5Location::closeObjId() - C API H5Oclose()

        // Gets general information about a file.
        H5File::getFileInfo() - C API H5Fget_info()

        // Returns the header version of an HDF5 object.
        H5Object::objVersion() - C API H5Oget_info()

      (BMR, 2017/05/13, HDFFV-10004, HDFFV-10156)

    - New class LinkAccPropList is added for link access proprety list

      (BMR, 2017/05/13, HDFFV-10156)

    High-Level APIs
    ---------------
    - H5DOread_chunk

      Users wanted to read compressed data directly from a file without any
      processing by the HDF5 data transfer pipeline, just as they were able
      to write it directly to a file with H5DOwrite_chunk.

      New API function, corresponding to existing function H5DOwrite_chunk.
      H5DOread_chunk reads a raw data chunk directly from a chunked dataset
      in the file into the application buffer, bypassing the library’s internal
      data transfer pipeline, including filters.

      (VC - 2017/05/02, HDFFV-9934)


Support for New Platforms, Languages, and Compilers
===================================================

    - Added OpenMPI 2.0.1 compiled with GCC 4.9.3


Bug Fixes since HDF5-1.8.18
===========================

    Configuration
    -------------
    - Support for Fortran shared libraries on OS X with autotools now
      works. Cmake builds still disables Fortran shared libraries on OS X.
      (MSB - 2017/04/30, HDFFV-2772)


    Library
    -------
    - bitfield datatypes

      bitfield datatypes did not fully support endianness of the data.

      Improved the endianness of bitfield datatypes by adding missing functional
      code. This code used integer types as a template.

      (ADB - 2017/05/12, HDFFV-10186)

    - Newly created datasets with H5D_COMPACT layout failed to open after
      several H5Dopen/H5Dclose cycles.

      The layout "dirty" flag for a compact dataset is now properly reset
      before flushing the message.

      (VC - 2017/05/11, HDFFV-10051)
    - Missing #ifdef __cplusplus macros were added to the generated H5Epubgen.h file.

      (DER - 2017/04/25, HDFFV-9638)


    Tools
    -----
    - h5repack

      h5repack did not maintain the creation order flag of the root
      group.

      Improved h5repack by reading the creation order and applying the
      flag to the new root group. Also added arguments to set the
      order and index direction, which applies to the traversing of the
      original file, on the command line.

      (ADB - 2017/05/26, HDFFV-8611)

    - h5diff

      h5diff failed to account for strpad type and null terminators
      of char strings. Also, h5diff failed to account for string length
      differences and would give a different result depending on file
      order in the command line.

      Improved h5diff compare of strings and arrays by adding a check for
      string lengths and if the strpad was null filled.

      (ADB - 2017/05/18, HDFFV-9055, HDFFV-10128)

    - h5diff

      h5diff help text about epsilon comparison was confusing.

      Changed h5diff help text to indicate that the 'a' refers to the
      datapoint in file1 and 'b' refers to the datapoint value in file2.

      (ADB - 2017/05/16, HDFFV-9995)

    - h5diff

      h5diff did not report user-defined filter data differences correctly.

      Improved h5diff compare of user-defined filter data by reporting an
      error if the user-defined filter plugin cannot be found.

      (ADB - 2017/01/18, HDFFV-9994)
    C++ API
    -------
    - The class hierarchy is revised to better reflect the HDF5 model.
      Class H5File is now derived from class Group instead of H5Location.
      Class Attribute is now derived from H5Location instead of IdComponent.
      Wrappers of H5A APIs in H5Location are now duplicated in H5Object,
      the original wrappers in H5Location will be deprecated in future
      releases.

      (BMR - 2017/05/15, HDFFV-10156)



Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    Linux 2.6.32-573.22.1.el6     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus/mayll)              Version 4.4.7 20120313
                                     Versions 4.9.3, 5.2.0, 6.2.0
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 16.10-0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 17.0.0.098 Build 20160721
                                  MPICH 3.1.4 compiled with GCC 4.9.3
                                  OpenMPI 2.0.1 compiled with GCC 4.9.3

    Linux 2.6.32-573.18.1.el6     gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
                                  IBM XL C/C++ V13.1
                                  IBM XL Fortran V15.1

    Linux 3.10.0-327.10.1.el7     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (kituo/moohan)                  Version 4.8.5 20150623 (Red Hat 4.8.5-4)
                                    Versions 4.9.3, 5.3.0, 6.2.0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 17.0.4.196 Build 20170411
                                  MPICH 3.1.4 compiled with GCC 4.9.3

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc
    Windows 7                     Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015 w/ Intel Fortran 16 (cmake)

    Windows 7 x64                 Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015 w/ Intel Fortran 16 (cmake)
                                  Visual Studio 2015 w/ Intel C, Fortran 2017 (cmake)
                                  Visual Studio 2015 w/ MSMPI 8 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 2.8.0(0.309/5/3)
                                      gcc and gfortran compilers (GCC 5.4.0)
                                      (cmake and autotools)

    Windows 10                    Visual Studio 2015 w/ Intel Fortran 16 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 2.8.0(0.309/5/3)
                                      gcc and gfortran compilers (GCC 5.4.0)
                                      (cmake and autotools)

    Windows 10 x64                Visual Studio 2015 w/ Intel Fortran 16 (cmake)

    Mac OS X Mt. Lion 10.8.5      Apple LLVM version 5.1 (clang-503.0.40)
    64-bit                        gfortran GNU Fortran (GCC) 4.8.2
    (swallow/kite)                Intel icc/icpc/ifort version 15.0.3

    Mac OS X Mavericks 10.9.5     Apple LLVM version 6.0 (clang-600.0.57)
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (wren/quail)                  Intel icc/icpc/ifort version 15.0.3

    Mac OS X Yosemite 10.10.5     Apple LLVM version 6.1 (clang-602.0.53)
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (osx1010dev/osx1010test)      Intel icc/icpc/ifort version 15.0.3

    Mac OS X El Capitan 10.11.4   Apple LLVM version 7.3.0 (clang-703.0.29)
    64-bit                        gfortran GNU Fortran (GCC) 5.2.0
    (VM osx1011dev/osx1011test)   Intel icc/icpc/ifort version 16.0.2


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform
Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
SunOS 5.11 32-bit                       n        y/y    n        y    y     y
SunOS 5.11 64-bit                       n        y/y    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/n    n        y    y     y
Windows 7 x64 Cygwin                    n        y/n    n        y    y     y
Windows 10                              y        y/y    n        y    y     y
Windows 10 x64                          y        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.5 64-bit    n        y/y    n        y    y     y
Mac OS X Mavericks 10.9.5 64-bit        n        y/y    n        y    y     y
Mac OS X Yosemite 10.10.5 64-bit        n        y/y    n        y    y     y
AIX 6.1 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 GNU      y        y/y    y        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 PGI      n        y/y    n        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 GNU      y        y/y    y        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 Intel    n        y/y    n        y    y     y
Linux 2.6.32-431.11.2.el6.ppc64         n        y/n    n        y    y     y

Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
SunOS 5.11 32-bit                          y       y         y         y
SunOS 5.11 64-bit                          y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 7 x64 Cygwin                       n       n         n         y
Windows 10                                 y       y         y         y
Windows 10 x64                             y       y         y         y
Mac OS X Mountain Lion 10.8.5 64-bit       y       n         y         y
Mac OS X Mavericks 10.9.5 64-bit           y       n         y         y
Mac OS X Yosemite 10.10.5 64-bit           y       n         y         y
AIX 6.1 32- and 64-bit                     y       n         n         y
CentOS 6.7 Linux 2.6.32 x86_64 GNU         y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 Intel       y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 PGI         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 GNU         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 Intel       y       y         y         y
Linux 2.6.32-431.11.2.el6.ppc64            y       y         y         y

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.32-573.22.1.el6     g95 (GCC 4.0.3 (g95 0.94!)
    #1 SMP x86_64 GNU/Linux
    (mayll)

    Debian8.4.0 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1 x86_64 GNU/Linux
                                  gcc (Debian 4.9.2-10) 4.9.2
                                  GNU Fortran (Debian 4.9.2-10) 4.9.2
                                  (cmake and autotools)

    Fedora24 4.7.2-201.fc24.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 6.1.1 20160621 (Red Hat 6.1.1-3)
                                  GNU Fortran (GCC) 6.1.1 20160621 (Red Hat 6.1.1-3)
                                  (cmake and autotools)

    CentOS 7.2 3.10.0-327.28.2.el7.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
                                  GNU Fortran (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
                                  (cmake and autotools)

    Ubuntu 16.04 4.4.0-38-generic #62-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu 5.4.0-6ubuntu1~16.04.2) 5.4.0
                                  GNU Fortran (Ubuntu 5.4.0-6ubuntu1~16.04.2) 5.4.0
                                  (cmake and autotools)


Known Problems
==============

    The dynamically loaded plugin test libraries require undefined references
    to HDF5 functions to be resolved at runtime in order to function properly.
    With autotools on CYGWIN this results in build errors, and we have not
    found a solution that satisfies both.  Therefore the dynamically loaded
    plugin tests have been disabled on CYGWIN.

    Known problems in previous releases can be found in the HISTORY*.txt files
    in the HDF5 source. Please report any new problems found to
    help@hdfgroup.org.


%%%%1.8.18%%%%


HDF5 version 1.8.18 released on 2016-11-14
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.17 and
HDF5-1.8.18, and contains information on the platforms tested and
known problems in HDF5-1.8.18.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.18 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     https://support.hdfgroup.org/HDF5/

The HDF5 1.8.18 release can be obtained from:

     https://support.hdfgroup.org/HDF5/release/obtain518.html

User documentation for 1.8.18 can be accessed directly at this location:

     https://support.hdfgroup.org/HDF5/doc1.8/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     https://support.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.18 (current
release) versus Release 1.8.17

     https://support.hdfgroup.org/HDF5/doc1.8/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.17
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Configuration
    -------------

    - CMake: Added NAMESPACE hdf5:: to package configuration files to allow
      projects using installed HDF5 binaries built with CMake to link with
      them without specifying the HDF5 library location via IMPORTED_LOCATION.

      (ADB, 2016/10/17, HDFFV-10003)


    - CMake: Changed the CTEST_BUILD_CONFIGURATION option to
      CTEST_CONFIGURATION_TYPE as recommended by the CMake documentation.

      (ADB, 2016/10/17, HDFFV-9971)

    - CMake: Added support for GIT

      (ADB, 2016/07/12)


    Library
    -------
    - None


    Parallel Library
    ----------------
    - None


    Tools
    -----
    - None


    High-Level APIs
    ---------------
    - None


    Fortran API
    -----------
    - None


    C++ API
    -------
    - None


Support for New Platforms, Languages, and Compilers
===================================================



Bug Fixes since HDF5-1.8.17
===========================

    Configuration
    -------------

    - Fixed a problem preventing HDF5 to be built on 32-bit CYGWIN by
      condensing cygwin configuration files into a single file and
      removing outdated compiler settings.

      (ABD, 2016/07/12, HDFFV-9946)


    - CMake: Fixed a command length overflow error by converting custom
      commands inside CMakeTest.cmake files into regular dependencies and
      targets.

      (ABD, 2016/07/12, HDFFV-9939)


    - CMake: Fixed a timeout error that would occasionally occur when running
      the virtual file driver tests simultaneously due to test directory and file
      name collisions.

      (ABD, 2016/09/19, HDFFV-9431)


    Library
    -------

    - Fixed a memory leak that would occur when the library allocated memory
      for an external file prefix (H5Pset_efile_prefix) and failed to free it.

      (DER, 2016/04/29)


    - Fixed an error that would occur when calling H5Adelete on an attribute
      which is attached to an externally linked object in the target file and
      whose datatype is a committed datatype in the main file.

      (VC, 2016-07-04, HDFFV-9940)


    - Fixed a problem where a plugin compiled into a DLL in the default plugin
      directory could not be found by the HDF5 library at runtime on Windows
      when the HDF5_PLUGIN_PATH environment variable was not set.

      (ABD, 2016/08/01, HDFFV-9706)


    - Fixed an issue where H5Pset_alignment could result in misaligned blocks
      with some input combinations, causing an assertion failure in debug mode.

      (NAF, 2016/08/11, HDFFV-9948)


    - A number of issues were fixed when reading/writing from/to corrupted
      files to ensure that the library fails gracefully in these cases:

      * Writing to a corrupted file that has an object message which is
        incorrectly marked as shareable on disk results in a buffer overflow /
        invalid write instead of a clean error message.

      * Decoding data from a corrupted file with a dataset encoded with the
        H5Z_NBIT decoding can result in a code execution vulnerability under
        the context of the application using the HDF5 library.

      * When decoding an array datatype from a corrupted file, the HDF5 library
        fails to return an error in production if the number of dimensions
        decoded is greater than the maximum rank.

      * When decoding an "old style" array datatype from a corrupted file, the
        HDF5 library fails to return an error in production if the number of
        dimensions decoded is greater than the maximum rank.

      (NAF, 2016/10/06, HDFFV-9950, HDFFV-9951, HDFFV-9992, HDFFV-9993)


    - Fixed an error that would occur when copying an object with an attribute
      which is a compound datatype consisting of a variable length string.

      (VC, 2016-10-17, HDFFV-7991)


    Parallel Library
    ----------------

    - Fixed a bug that could occur when allocating a chunked dataset in parallel
      with an alignment set and an alignment threshold greater than the chunk
      size but less than or equal to the raw data aggregator size.

      (NAF, 2016/08/11, HDFFV-9969)


    Performance
    -------------
    - None


    Tools
    -----

    - Fixed an error in the compiler wrapper scripts (h5cc, h5fc, et al.)
      in which they would erroneously drop the file argument specified via
      the -o flag when the -o flag was specified before the -c flag on the
      command line, resulting in a failure to compile.

      (LRK, 2016/06/08, HDFFV-9938, HDFFV-9530)


    - h5repack User Defined (UD) filter parameters were not parsed correctly.

      The UD filter parameters were not being parsed correctly. Reworked coding
      section to parse the correct values and verify number of parameters.

      (ADB, 2016/10/19, HDFFV-9996, HDFFV-9974, HDFFV-9515, HDFFV-9039)


    Fortran API
    -----------

    - Fortran library fails to compile and fails tests with NAG compiler.

      * Removed the non-standard assumption that KIND=SIZEOF, in the HDF5
        configure programs.
      * Removed Fortran 66 character/integer conversions from tests.
      * Removed the use of C_SIZEOF in the test programs
      * Changed to using STORAGE_SIZE in the test programs if available. Otherwise,
        uses C_SIZEOF or SIZEOF.

      (MSB, 2016/9/22, HDFFV-9973)


    - Fortran segfaults for F03 tests with NAG compiler

      * Removed INTENT(OUT) from 'fillvalue' in F2003 interface
        for H5Pget_fill_value_f.

      (MSB, 2016/9/22, HDFFV-9980)


    C++ API
    -------

    - The macro H5_NO_NAMESPACE is deprecated from the HDF5 C++ API library.
      In future releases, the macros H5_NO_STD and OLD_HEADER_FILENAME may
      also be removed.

      (BMR, 2016/10/27, HDFFV-9532)


    High-Level APIs:
    ---------------

    - The high-level API Packet Table (PT) did not write data correctly when
      the datatype is a compound type that has string type as one of the
      members.  This problem started in 1.8.15, after the fix of HDFFV-9042
      was applied, which caused the Packet Table to use native type to access
      the data.  It should be up to the application to specify whether the
      buffer to be read into memory in the machine’s native architecture.
      Thus, the PT is fixed to not use native type but to make a copy of the
      user's provided datatype during creation or the packet table's datatype
      during opening.  If an application wishes to use native type to read the
      data, then the application will request that.  However, the Packet Table
      doesn't provide a way to specify memory datatype in this release.  This
      feature will be available in future releases, HDFFV-10023.

      (BMR, 2016/10/27, HDFFV-9758)


    Fortran High-Level APIs:
    ------------------------
    - None


    Testing
    -------
    - None


Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    Linux 2.6.32-573.22.1.el6     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus/mayll)              Version 4.4.7 20120313
                                     Versions 4.8.4, 4.9.3, 5.2.0
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 15.7-0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 15.0.3.187 Build 20150407
                                  MPICH 3.1.4 compiled with GCC 4.9.3

    Linux 2.6.32-573.18.1.el6     gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
                                  IBM XL C/C++ V13.1
                                  IBM XL Fortran V15.1

    Linux 3.10.0-327.10.1.el7     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (kituo/moohan)                  Version 4.8.5 20150623 (Red Hat 4.8.5-4)
                                    Versions 4.9.3, 5.2.0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 15.0.3.187 Build 20150407
                                  MPICH 3.1.4 compiled with GCC 4.9.3

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc

    Windows 7                     Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015 w/ Intel Fortran 16  (cmake)
                                  Cygwin(CYGWIN_NT-6.1 2.2.1(0.289/5/3) gcc(4.9.3) compiler and gfortran)
                                  (cmake and autotools)

    Windows 7 x64                 Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015 w/ Intel Fortran 16  (cmake)

    Windows 10                    Visual Studio 2015 w/ Intel Fortran 16 (cmake)

    Windows 10 x64                Visual Studio 2015 w/ Intel Fortran 16 (cmake)

    Mac OS X Mt. Lion 10.8.5      Apple LLVM version 5.1 (clang-503.0.40)
    64-bit                        gfortran GNU Fortran (GCC) 4.8.2
    (swallow/kite)                Intel icc/icpc/ifort version 15.0.3

    Mac OS X Mavericks 10.9.5     Apple LLVM version 6.0 (clang-600.0.57)
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (wren/quail)                  Intel icc/icpc/ifort version 15.0.3

    Mac OS X Yosemite 10.10.5     Apple LLVM version 6.1 (clang-602.0.53)
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (osx1010dev/osx1010test)      Intel icc/icpc/ifort version 15.0.3

    Mac OS X El Capitan 10.11.4   Apple LLVM version 7.3.0 (clang-703.0.29)
    64-bit                        gfortran GNU Fortran (GCC) 5.2.0
    (VM osx1011dev/osx1011test)   Intel icc/icpc/ifort version 16.0.2


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
SunOS 5.11 32-bit                       n        y/y    n        y    y     y
SunOS 5.11 64-bit                       n        y/y    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/y    n        y    y     n
Windows 10                              n        y/y    n        y    y     y
Windows 10 x64                          n        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.5 64-bit    n        y/y    n        y    y     y
Mac OS X Mavericks 10.9.5 64-bit        n        y/y    n        y    y     y
Mac OS X Yosemite 10.10.5 64-bit        n        y/y    n        y    y     y
AIX 6.1 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 GNU      y        y/y    y        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 PGI      n        y/y    n        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 GNU      y        y/y    y        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 Intel    n        y/y    n        y    y     y
Linux 2.6.32-431.11.2.el6.ppc64         n        y/n    n        y    y     y

Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
SunOS 5.11 32-bit                          y       y         y         y
SunOS 5.11 64-bit                          y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 10                                 y       y         y         y
Windows 10 x64                             y       y         y         y
Mac OS X Mountain Lion 10.8.5 64-bit       y       n         y         y
Mac OS X Mavericks 10.9.5 64-bit           y       n         y         y
Mac OS X Yosemite 10.10.5 64-bit           y       n         y         y
AIX 6.1 32- and 64-bit                     y       n         n         y
CentOS 6.7 Linux 2.6.32 x86_64 GNU         y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 Intel       y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 PGI         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 GNU         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 Intel       y       y         y         y
Linux 2.6.32-431.11.2.el6.ppc64            y       y         y         y

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.32-573.22.1.el6     g95 (GCC 4.0.3 (g95 0.94!)
    #1 SMP x86_64 GNU/Linux
    (platypus)

    Debian8.4.0 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1 x86_64 GNU/Linux
                                  gcc (Debian 4.9.2-10) 4.9.2
                                  GNU Fortran (Debian 4.9.2-10) 4.9.2
                                  (cmake and autotools)

    Fedora24 4.7.2-201.fc24.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 6.1.1 20160621 (Red Hat 6.1.1-3)
                                  GNU Fortran (GCC) 6.1.1 20160621 (Red Hat 6.1.1-3)
                                  (cmake and autotools)

    CentOS 7.2 3.10.0-327.28.2.el7.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
                                  GNU Fortran (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
                                  (cmake and autotools)

    Ubuntu 16.04 4.4.0-38-generic #62-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu 5.4.0-6ubuntu1~16.04.2) 5.4.0
                                  GNU Fortran (Ubuntu 5.4.0-6ubuntu1~16.04.2) 5.4.0
                                  (cmake and autotools)


Known Problems
==============
* On windows platforms in debug configurations, the VFD flush1 tests will fail
  with the split and multi VFD drivers. These tests will display a modal debug
  dialog which must be answered or wait for the test timeout to expire.
  (ADB - 2014/06/23 - HDFFV-8851)

* CLANG compiler with the options -fcatch-undefined-behavior and -ftrapv
  catches some undefined behavior in the alignment algorithm of the macro DETECT_I
  in H5detect.c (Issue 8147).  Since the algorithm is trying to detect the alignment
  of integers, ideally the flag -fcatch-undefined-behavior shouldn't to be used for
  H5detect.c. In the future, we can separate flags for H5detect.c from the rest of
  the library. (SLU - 2013/10/16)

* Make provided by Solaris fails in "make check". Solaris users should use
  gmake to build and install the HDF5 software. (AKC - 2013/10/08 - HDFFV-8534)

* The C++ and FORTRAN bindings are not currently working on FreeBSD with the
  native release 8.2 compilers (4.2.1), but are working with gcc 4.6 from the
  ports (and probably gcc releases after that).
  (QAK - 2012/10/19)

* The following h5dump test case fails in BG/P machines (and potentially other
  machines that use a command script to launch executables):

   h5dump --no-compact-subset -d "AHFINDERDIRECT::ah_centroid_t[0] it=0 tl=0"
     tno-subset.h5

  This is due to the embedded spaces in the dataset name being interpreted
  by the command script launcher as meta-characters, thus passing three
  arguments to h5dump's -d flag. The command passes if run by hand, just
  not via the test script.
  (AKC - 2012/05/03)

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14 - HDFFV-8235)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. the issue. HL and C++ shared libraries should now be
  working as intended, however.
  (MAM - 2011/04/20)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)


%%%%1.8.17%%%%


HDF5 version 1.8.17 released on 2016-05-10
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.16 and
HDF5-1.8.17-*, and contains information on the platforms tested and
known problems in HDF5-1.8.17-*.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.17 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.17 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.17 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.17 (current
release) versus Release 1.8.16

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org



CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.16
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems



New Features
============

    Configuration
    -------------
    - Cmakehdf5: Added Ability to Run Multiple Make Commands

      Added option --njobs to specify up to how many jobs to launch during
      build (cmake) and testing (ctest).

      (AKC - 2015/12/13, HDFFV-9612)

    - Cmakehdf5: Added Szip Support and Verbose Option

      Added --with-szlib to support the Szip library; and
      --enable/disable-verbose to display all CMake process output.

      (AKC - 2015/11/16, HDFFV-8932 and DAILYTEST-195)

    - CMake minimum is now 3.1.0. (ADB - 2015/11/14)

    - Large File System (LFS) Support has Changed in the Autotools

      We assume that fseeko and ftello exist.

      The *64 I/O functions and types are no longer explicitly used.
      We now rely on a mapping provided by _FILE_OFFSET_BITS (or its
      equivalent).

      _LARGEFILE(64)_SOURCE is no longer exposed via AM_CPPFLAGS.

      (DER - 2016/03/29, HDFFV-9626 and HDFFV-9541)



    Library
    -------
    - New API Calls for Searching for External Dataset Storage

      API calls that determine the search path for dataset external
      storage were added. H5Pset/get_efile_prefix() API calls were added
      to the library. These functions give control over the search path
      for dataset external storage that has been configured with
      H5Pset_external().

      Additionally, the HDF5_EXTFILE_PREFIX environment variable can be
      used to control the search path.

      (DER - 2016/04/20, HDFFV-8740)



    Parallel Library
    ----------------
    - None



    Tools
    -----
    - None



    High-Level APIs
    ---------------

    C Packet Table API
    ------------------
    - Replacement of a Public Function with H5PTcreate

      The existing function H5PTcreate_fl limits applications so they
      can use the deflate compression only. The public function
      H5PTcreate has been added to replace H5PTcreate_fl. H5PTcreate
      takes a property list identifier to provide flexibility on
      creation properties.  This also removes the following warning:
      "deprecated conversion from string constant to "char*"
      [-Wwrite-strings]".

      (BMR - 2016/04/25, HDFFV-9708, HDFFV-8615)

    - New Public Functions: H5PTget_dataset and H5PTget_type

      Two accessor functions have been added. H5PTget_dataset returns
      the identifier of the dataset associated with the packet table,
      and H5PTget_type returns the identifier of the datatype used by
      the packet table.

      (BMR - 2016/04/25, HDFFV-8623 patch 3)

    - Regarding #ifdef VLPT_REMOVED

      The #ifdef VLPT_REMOVED blocks have been removed from the packet
      table (PT) library source except for the following functions:
        + H5PTis_varlen() has been made available again
        + H5PTfree_vlen_readbuff() is now H5PTfree_vlen_buff()

      (BMR - 2016/04/25, HDFFV-442)

    C++ Packet Table API
    --------------------
    - New Constructor in FL_PacketTable

      An overloaded constructor has been added to FL_PacketTable and
      takes a property list identifier to provide flexibility on
      creation properties such as compression.

      FL_PacketTable(hid_t fileID, const char* name, hid_t dtypeID,
                       hsize_t chunkSize = 0, hid_t plistID = H5P_DEFAULT)

      (BMR - 2016/04/25, HDFFV-8623 patch 5)

    - New Member Functions in PacketTable

      Two accessor wrappers were added to class PacketTable.

      PacketTable::GetDataset() returns the identifier of the dataset
      associated with the packet table, and PacketTable::GetDatatype()
      returns the identifier of the datatype that the packet table uses.

      (BMR - 2016/04/25, HDFFV-8623 patch 4)

    - New Member Functions with "char*" as an Argument

      Overloaded functions were added to provide the "const char*"
      argument; the existing version will be deprecated in future
      releases. This also removes the following warning:
      "deprecated conversion from string constant to "char*"
      [-Wwrite-strings]".

      (BMR - 2016/04/25, HDFFV-8623 patch 1, HDFFV-8615)

    - Regarding #ifdef VLPT_REMOVED

      The #ifdef VLPT_REMOVED blocks have been removed from the packet
      table library source code except for the following functions:
        + VL_PacketTable::IsVariableLength() was moved to PacketTable
        + VL_PacketTable::FreeReadBuff() is now PacketTable::FreeBuff()

      (BMR - 2016/04/25, HDFFV-442)



    Fortran API
    -----------
    - None



    C++ API
    -------
    - New Member Function in DSetCreatPropList

      DSetCreatPropList::setNbit() was added to setup N-bit compression for
      a dataset.

      (BMR - 2016/04/25, HDFFV-8623 patch 7)

    - New Overloaded "const" Member Functions in ArrayType

      The two following functions were added:
        ArrayType::getArrayNDims() const
        ArrayType::getArrayDims() const
      to provide const version, and the non-const version was marked
      deprecated. In-memory array information, ArrayType::rank and
      ArrayType::dimensions, were removed. This is an implementation
      detail and should not affect applications.

      (BMR, 2016/04/25, HDFFV-9725)

     - New member function added

       The assignment operator ArrayType::operator= is added because ArrayType
       has pointer data members.

       (BMR, 2016/03/07, HDFFV-9562)


Support for New Platforms, Languages, and Compilers
===================================================
    - Mac OS X El Capitan 10.11.4 with compilers Apple clang/clang++
      version 7.3.0 from Xcode 7.3, gfortran GNU Fortran (GCC) 5.2.0
      and Intel icc/icpc/ifort version 16.0.2



Bug Fixes since HDF5-1.8.16
===========================

    Configuration
    -------------
    - Updated Linux Language Level Flags to Match the Autotools. Removed
      Linux-specific Flags from OS X.

      An addition to the flags simply being out of sync with the Autotools,
      the Linux flags were used on OS X builds which led to symbols not being
      found. Although this was non-fatal and compilation continued (implicit
      definitions were used by the compiler and the symbols resolved at link
      time), a large number of warnings were raised.

      Linux changes:

      * CHANGED:    _POSIX_C_SOURCE (from 199605 to 200112L)
      * ADDED:      _GNU_SOURCE
      * REMOVED:    _BSD_SOURCE
      * REMOVED:    _DEFAULT_SOURCE

      (DER - 2015/12/08, HDFFV-9627)

    - The --enable-clear-file-buffers configure Option was Non-functional
      so the Feature was Always Enabled (its default value).

      Regardless of the configure flag, the setting was always enabled when
      the Autotools were used to configure HDF5. This was due to the "no"
      option being processed after the "*" option in configure.ac so "*"
      matched first. CMake was unaffected.

      The option now works correctly.

      NOTE that builders are always advised to leave this option enabled.
      When disabled, buffers that are written to disk may contain the
      memory's previous contents, which may include secure information.
      The performance overhead of the feature (a single memset call per
      allocation) is minimal.

      (DER - 2016/02/03, HDFFV-9676)

    - Added a patch to remove '"'s from arguments for MPI compilers that
      were causing errors compiling H5lib_settings.c with SGI MPT.

      (LRK - 2016/04/20, HDFFV-9439)

    Library
    -------
    - Fixed shared file pointer problem which caused a crash when running a
      program provided by a user.

      (VC - 2016/04/01, HDFFV-9469)

    - Fixed some format string warnings that prevent compiling with
      -Werror=format-security on gcc.

      These only appeared in error messages and would not cause problems
      under normal operation.

      (DER - 2016/01/13, HDFFV-9640)

    - Fixed a library segmentation fault when accessing a corrupted
      file provided by a user.

      (MSC - 2016/02/19, HDFFV-9670)



    Parallel Library
    ----------------
    - None



    Performance
    -------------
    - None



    Tools
    -----
    - h5dump: Sub-setting Fixed for Dimensions Greater than Two

      When a dataset has more than two dimensions, sub-setting would
      incorrectly calculate the data that needed to be displayed.
      Added in block and stride calculations that account for dimensions
      greater than two. NOTE: lines that have line breaks inserted
      because of display length calculations may have index info that
      is incorrect until the next dimension break.

      (ADB - 2016/03/07, HDFFV-9698)

    - h5dump: Issue with Argument Segmentation Fault

      When an argument with an optional value was at the end of the command
      line with a value, h5dump would crash. Reworked check for remaining
      arguments.

      (ADB - 2016/03/07, HDFFV-9570, HDFFV-9684)

    - h5dump: Issue with Default Fill Value

      Added all default cases of fill value to the display of fill value.

      (ADB -, 2016/03/07, HDFFV-9241)

    - h5dump: Clarified Help

      Clarified usage of -O F option in h5dump utility help.

      (ADB - 2016/03/07, HDFFV-9066)

    - h5dump: Issue with Double Free Fault

      Added a check for filename not null before calling free().

      (ADB - 2016/01/27, HDFFV-9639)

    - VS2015 Release Changed how Timezone was Handled

      Created a function, HDget_timezone, in H5system.c. Replaced
      timezone variable usage with function call.

      (ADB - 2015/11/02, HDFFV-9550)



    Fortran API
    -----------
    - None



    C++ API
    -------
    - Removal of Obsolete Methods

      The overloaded methods which had parameters that should be const
      but were not have been removed.

      (BMR - 2016/01/13, HDFFV-9789)



    High-Level APIs:
    ---------------
    - Fixed Memory Leak in Packet Table API

      Applied user's patch to fix memory leak in the creation of a
      packet table.

      (BMR - 2016/04/25, HDFFV-9700)



    Fortran High-Level APIs:
    ------------------------
    - None



    Testing
    -------
    - None



Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    AIX 6.1                       xlc/xlc_r 10.1.0.5
    (NASA G-ADA)                  xlC/xlC_r 10.1.0.5
                                  xlf90/xlf90_r 12.1.0.6

    Linux 2.6.32-573.22.1.el6     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus)                       Version 4.4.7 20120313
                                     Version 4.9.3, Version 5.2.0
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 15.7-0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 15.0.3.187 Build 20150407
                                  MPICH 3.1.4 compiled with GCC 4.9.3

    Linux 2.6.32-504.8.1.el6.ppc64 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
                                  IBM XL C/C++ V13.1
                                  IBM XL Fortran V15.1

    Linux 3.10.0-229.14.1.el7   GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (kituo/moohan)                  Version 4.8.5 20150623 (Red Hat 4.8.5-4)
                                    Version 5.2.0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 15.0.3.187 Build 20150407
                                  MPICH 3.1.4 compiled with GCC 4.9.3

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc

    Windows 7                     Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015  (cmake)
                                  Cygwin(CYGWIN_NT-6.1 2.2.1(0.289/5/3) gcc(4.9.3) compiler and gfortran)
                                  (cmake and autotools)

    Windows 7 x64                 Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015  (cmake)

    Windows 8.1                   Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Windows 8.1 x64               Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Mac OS X Mt. Lion 10.8.5      Apple clang/clang++ version 5.1 from Xcode 5.1
    64-bit                        gfortran GNU Fortran (GCC) 4.8.2
    (swallow/kite)                Intel icc/icpc/ifort version 15.0.3

    Mac OS X Mavericks 10.9.5     Apple clang/clang++ version 6.0 from Xcode 6.2
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (wren/quail)                  Intel icc/icpc/ifort version 15.0.3

    Mac OS X Yosemite 10.10.5     Apple clang/clang++ version 6.1 from Xcode 7.0
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (osx1010dev/osx1010test)      Intel icc/icpc/ifort version 15.0.3

    Mac OS X El Capitan 10.11.4   Apple clang/clang++ version 7.3.0 from Xcode 7.3
    64-bit                        gfortran GNU Fortran (GCC) 5.2.0
    (osx1011dev/ox1011test)       Intel icc/icpc/ifort version 16.0.2


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
SunOS 5.11 32-bit                       n        y/y    n        y    y     y
SunOS 5.11 64-bit                       n        y/y    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/y    n        y    y     n
Windows 8.1                             n        y/y    n        y    y     y
Windows 8.1 x64                         n        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.5 64-bit    n        y/y    n        y    y     y
Mac OS X Mavericks 10.9.5 64-bit        n        y/y    n        y    y     y
Mac OS X Yosemeti 10.10.5 64-bit        n        y/y    n        y    y     y
AIX 6.1 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 GNU      y        y/y    y        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 PGI      n        y/y    n        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 GNU      y        y/y    y        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 Intel    n        y/y    n        y    y     y
Linux 2.6.32-431.11.2.el6.ppc64         n        y/n    n        y    y     y

Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
SunOS 5.11 32-bit                          y       y         y         y
SunOS 5.11 64-bit                          y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 8.1                                y       y         y         y
Windows 8.1 x64                            y       y         y         y
Mac OS X Mountain Lion 10.8.5 64-bit       y       n         y         y
Mac OS X Mavericks 10.9.5 64-bit           y       n         y         y
Mac OS X Yosemeti 10.10.5 64-bit           y       n         y         y
AIX 6.1 32- and 64-bit                     y       n         n         y
CentOS 6.7 Linux 2.6.32 x86_64 GNU         y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 Intel       y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 PGI         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 GNU         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 Intel       y       y         y         y
Linux 2.6.32-431.11.2.el6.ppc64            y       y         y         y

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.18-431.11.2.el6     g95 (GCC 4.0.3 (g95 0.94!)
    #1 SMP x86_64 GNU/Linux
    (platypus)

    Windows 7                     Visual Studio 2008  (cmake)

    Windows 7 x64                 Visual Studio 2008  (cmake)

    Windows 10                    Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Windows 10 x64                Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Debian7.5.0 3.2.0-4-amd64 #1 SMP Debian 3.2.51-1 x86_64 GNU/Linux
                                  gcc (Debian 4.7.2-5) 4.7.2
                                  GNU Fortran (Debian 4.7.2-5) 4.7.2
                                  (cmake and autotools)

    Fedora20 3.15.3-200.fc20.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.8.3 20140624 (Red Hat 4.8.3-1)
                                  GNU Fortran (GCC) 4.8.3 20140624 (Red Hat 4.8.3-1)
                                  (cmake and autotools)

    SUSE 13.1 3.11.10-17-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.8.1
                                  GNU Fortran (SUSE Linux) 4.8.1
                                  (cmake and autotools)

    Ubuntu 14.04 3.13.0-35-generic #62-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.9.1-0ubuntu1) 4.9.1
                                  GNU Fortran (Ubuntu/Linaro 4.9.1-0ubuntu1) 4.9.1
                                  (cmake and autotools)

    hopper.nersc.gov              PrgEnv-gnu/5.2.40
                                  gcc (GCC) 4.9.2 20141030 (Cray Inc.)
                                  GNU Fortran (GCC) 4.9.2 20141030 (Cray Inc.)
                                  g++ (GCC) 4.9.2 20141030 (Cray Inc.)


Known Problems
==============
* On windows platforms in debug configurations, the VFD flush1 tests will fail
  with the split and multi VFD drivers. These tests will display a modal debug
  dialog which must be answered or wait for the test timeout to expire.
  (ADB - 2014/06/23 - HDFFV-8851)

* CLANG compiler with the options -fcatch-undefined-behavior and -ftrapv
  catches some undefined behavior in the alignment algorithm of the macro DETECT_I
  in H5detect.c (Issue 8147).  Since the algorithm is trying to detect the alignment
  of integers, ideally the flag -fcatch-undefined-behavior shouldn't to be used for
  H5detect.c. In the future, we can separate flags for H5detect.c from the rest of
  the library. (SLU - 2013/10/16)

* Make provided by Solaris fails in "make check". Solaris users should use
  gmake to build and install the HDF5 software. (AKC - 2013/10/08 - HDFFV-8534)

* The C++ and FORTRAN bindings are not currently working on FreeBSD with the
  native release 8.2 compilers (4.2.1), but are working with gcc 4.6 from the
  ports (and probably gcc releases after that).
  (QAK - 2012/10/19)

* The following h5dump test case fails in BG/P machines (and potentially other
  machines that use a command script to launch executables):

   h5dump --no-compact-subset -d "AHFINDERDIRECT::ah_centroid_t[0] it=0 tl=0"
     tno-subset.h5

  This is due to the embedded spaces in the dataset name being interpreted
  by the command script launcher as meta-characters, thus passing three
  arguments to h5dump's -d flag. The command passes if run by hand, just
  not via the test script.
  (AKC - 2012/05/03)

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14 - HDFFV-8235)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. the issue. HL and C++ shared libraries should now be
  working as intended, however.
  (MAM - 2011/04/20)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)


%%%%1.8.16%%%%


HDF5 version 1.8.16 released on 2015-11-10
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.15 and
HDF5-1.8.16, and contains information on the platforms tested and
known problems in HDF5-1.8.16.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.16 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.16 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.16 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.16 (current
release) versus Release 1.8.15":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.15
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems

New Features
============

    Configuration and Build
    -------------
    - The thread-safety + high-level library combination has been marked
      as "unsupported" in the Autotools

      The global lock used by the thread-safety feature has never been
      raised to the high-level library level, making it possible that
      the library state could change if a context switch were to occur in
      a high-level library call. Because of this, the combination of
      thread-safety and high-level library is officially unsupported by
      The HDF Group.

      In the past, although this combination has never been supported, this
      was not enforced by the build systems. These changes will cause an
      Autotools configure step to fail if --enable-threadsafe and
      --enable-hl are combined unless additional options are specified.
      Since the high-level library is built by default, this means that
      these extra configuration options will need to be used any time
      --enable-threadsafe is selected.

      To build with --enable-threadsafe, either:

      1) Use --disable-hl to disable the high-level library (recommended)

      2) Use --enable-unsupported to build the high-level library with
         the thread-safety feature.

      (DER - 2015/09/10 HDFFV-8719)

    - Using CMake now builds both static and shared libraries.

      The CMake files have been updated to build both static and shared
      libraries, with tools only built statically. The packaging of the
      libraries and tools will include cmake-config files that allows
      projects to choose either shared or static (default) libraries
      to be found with the find_package command using the COMPONENTS
      keyword and a list of components. The imported libraries will
      include any interface specific settings and dependent libraries.

      The default setting for BUILD_SHARED_LIBS has changed from OFF
      to ON, which builds both static and shared libraries. The static
      libraries are always built because of tools requirements.

      (ADB - 2015/08/24 HDFFV-5881)

    - Inline functions now correctly annotated with Autotools builds.

      The method used to detect the appropriate inline markup scheme was
      nonfunctional in Autotools builds. The Autotools have been modified
      to correctly detect the compiler's inline markup symbol and apply it
      to the source. Note that only a very small number of internal
      functions are marked inline so this was not a very big change or
      likely to significantly affect performance.

      As a part of this change, the H5_inline symbol no longer appears in
      H5pubconf.h.

      (DER - 2015/08/13 HDFFV-9119, HDFFV-9421)

    - Removed obsolete/unmaintained files from config/

      Several files were removed from the config directory. These files
      represent old operating systems, were no longer necessary, and/or
      were no longer maintained. configure.ac was updated to reflect the
      removed files.

      Removed:

        craynv
        dec-flags
        hpux11.23
        ia64-linux-gnu
        nec-superux14.1
        sv1-cray
        x86_64-redstorm-linux-gnu
        powerpc-ibm-aix5.x

      As a part of this work, a few lines that deal with locating the
      sys/fpu.h header on SGI machines and some OSF/1 configure lines
      were also removed. The Solaris config was also renamed to not have
      a version number since the version number was ignored by configure
      as it applies to all Solaris versions.

      (DER - 2015/09/04 HDFFV-9116)

    - Removed the FP_TO_INTEGER_OVERFLOW_WORKS macro/defines from the library

      This was for working around bugs in the Cray X1 compiler, which is no
      longer supported.

    (DER - 2015/09/09 HDFFV-9191)

    - Removed the H5_SW_ULONG_TO_FP_BOTTOM_BIT_WORKS and
      H5_FP_TO_ULLONG_BOTTOM_BIT_WORKS symbols and associated code.

      H5_SW_ULONG_TO_FP_BOTTOM_BIT_WORKS was a work-around on old 64-bit
      SGI and Solaris systems.

      H5_FP_TO_ULLONG_BOTTOM_BIT_WORKS was a work-around for old PGI
      compilers on Linux.

      Neither of these were used in any current library code and only appeared
      in the dt_arith test.

      (DER - 2015/09/09 HDFFV-9187)

    - Removed CONVERT_DENORMAL_FLOAT symbol and associated code from the
      library.

      This was only set in configure files for Cray and NEC computers. These
      config files no longer exist so there is no effect on currently
      supported platforms.

      (DER - 2015/09/09 HDFFV-9188)

    - Removed _BSD_SOURCE and _DEFAULT_SOURCE from configure.ac

      These are old BSD-compatibility symbols that are no longer needed by
      the library.

      (DER - 2015/09/10 HDFFV-9079)

    - Removed HW_FP_TO_LLONG_NOT_WORKS symbol and associated code from the
      library.

      This was part of a work-around for the VS.NET 2003 compiler, which is
      no longer supported.

      (DER - 2015/09/10 HDFFV-9189)

    - Removed the BAD_LOG2_CODE_GENERATED symbol and associated code from the
      library.

      This was an IRIX work-around.

      (DER - 2015/09/11 HDFFV-9195)

    - Decoupled shared object version numbers for wrapper libraries from the
      shared object version number for the HDF5 library.  These will be
      maintained on an individual basis according to the interface changes
      specific to these wrapper libraries.

      For HDF5 1.8.16 the shared object version numbers were changed from
      10.0.1 to 10.1.0 for the HDF5 library due to added APIs. For the C++
      wrapper library they were changed from 10.0.1 to 11.0.0 due to changes
      in existing APIs. For all other wrapper libraries the versions were
      changed from 10.0.1 to 10.0.2 because while the APIs had no changes
      there have been changes in code that did not result in changes to their
      interfaces.

      (LRK - 2015/10/28)

    Library
    -------

    - H5F_ACC_DEBUG flag for H5Fopen/create: functionality removed

      The symbol was used to emit some extra debugging information
      for HDF Group developers in the multi VFD. The underlying
      functionality has been removed due to disuse. The symbol
      remains defined since it was visible in H5Fpublic.h but it
      has been set to zero and has no effect anywhere in the library.

      (DER - 2015-05-02, HDFFV-1074)

    - New public API call: H5is_library_threadsafe()

      This API call indicates if the library was built with thread-
      safety enabled.

      (DER - 2015-09-01, HDFFV-9496)

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - None

    High-Level APIs
    ---------------
    - None

    Fortran API
    -----------
    - None


    C++ API
    -------
    - Class H5::ObjCreatPropList is added for the object creation property
      list class.

      Class H5::ObjCreatPropList is derived from H5::PropList and is a
      baseclass of H5::DSetCreatPropList.  Additional property list classes
      will be derived from H5::ObjCreatPropList when they are added to the
      library in future releases.

      (BMR, 2015/10/13, Part of HDFFV-9169)

    - New Wrappers for C Functions H5P[s/g]et_attr_phase_change and
      H5P[s/g]et_attr_creation_order.

      Wrappers were added to class H5::ObjCreatPropList for the C Functions
      H5Pset_attr_phase_change:         H5::ObjCreatPropList::setAttrPhaseChange
      H5Pget_attr_phase_change:         H5::ObjCreatPropList::getAttrPhaseChange
      H5Pset_attr_creation_order:       H5::ObjCreatPropList::setAttrCrtOrder
      H5Pget_attr_creation_order:       H5::ObjCreatPropList::getAttrCrtOrder

      (BMR, 2015/10/13, Part of HDFFV-9167 and HDFFV-9169)


Support for New Platforms, Languages, and Compilers
===================================================
    - Added VS2015 with Intel Fortran 16 to supported Windows 7 platforms


Bug Fixes since HDF5-1.8.15
===========================

    Configuration
    -------------

    - CMake test for long long printf format improved

      The CMake configuration test for determining the printf format string
      for printing a long long integer was fixed. The test would crash
      when executed with VS2015.

      (ADB - 2015-10-21 HDFFV-9488)

    Library
    -------
    - VS2015 removed global variable timezone

      The usage of the global variable timezone was modified for VS2015 by
      adding an alias to Windows builds.

      (ADB - 2015-10-23 HDFFV-9550)

    - Fix potential error in H5Iclear_type

      If the ID type's close callback could close another ID of the same type,
      H5Iclear_type could occasionally run into problems due to the inner
      workings of the skip list package.  This could potentially cause an
      error on library shutdown without calling H5Iclear_type directly.  This
      issue has been fixed.

      (NAF - 2015-08-12)

    - Fix uninitialized memory in dataspace selection code

      When creating a dataspace with H5Screate and setting the extent with
      H5Sextent_copy, the selection offset was not initialized, potentially
      causing invalid I/O.  There may be other cases where this happened.
      Modified the library to always initialize the offset.

      (NAF - 2015-09-08)

    - Truncate file in H5Fflush() if EOA != EOF to avoid file
      corruption in certain scenarios

      In the following scenario, the resulting HDF5 file would be
      incorrectly corrupted because the truncate operation
      was at some point wrongly moved out of the flush operation:
          - Create a new file with a single dataset.
          - Write parts of the dataset (make sure that some values at
            the end of the dataset are not initialized).
          - Flush the file.
          - Crash the program.
          - Try to open the file with h5dump or h5debug, but the
            resulting file is corrupted.

      (MSC - 2015-06-15 HDFFV-9418)


    Parallel Library
    ----------------
    -
      (XYZ - YYYY/MM/DD HDFFV-####)

    Performance
    -------------
    - None

    Tools
    -----
    - VS2015 changed the default format for printing of exponents

      VS2015 default format for exponents changed with the elimination
      of the leading '0'. CMake now tests for the VS2015 compiler and
      adjusts which reference files are used by tests.

      (ADB - 2015-10-23 HDFFV-9550)

    - Fixed h5repack with user-defined filters

      h5repack would throw a buffer overrun exception on Windows when
      parsing a user-defined filter ID of 5 digits. A local variable in
      the parse routine was not of sufficient size.

      (ADB - 2015/09/01 HDFFV-9515)

    Fortran API
    ------------
    - None


    C++ API
    ------
    - Removed memory leaks

      The static global constant objects were changed to constant references
      referencing dynamically allocated objects.  This ensures that the clean-up
      process in the C++ library occurs before the termination of the C library
      and prevents memory leaks because the previous global constants were not
      properly deleted before the C library termination.

      (BMR, 2015/10/13, HDFFV-9529)

    - Fixed the problem about identifiers being closed prematurely.

      The C++ library needs to increment the ID's reference counter when it is
      duplicated in the form of C++ objects, but not when the ID is obtained
      from a C function.  With this approach, both problems, prematurely
      closing ID's and memory leaks due to ID's not being closed, should be
      eliminated.

      (BMR, 2015/10/15, HDFFV-7947)


    High-Level APIs:
    ------
    - None


    Fortran High-Level APIs:
    ------------------------
    - None


    Testing
    -------
    - None


Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    AIX 6.1                       xlc/xlc_r 10.1.0.5
    (NASA G-ADA)                  xlC/xlC_r 10.1.0.5
                                  xlf90/xlf90_r 12.1.0.6

    Linux 2.6.32-573.3.1.el6    GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus)                       Version 4.4.7 20120313
                                     Version 4.8.4, Version 5.2.0
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 15.7-0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 15.0.3.187 Build 20150407
                                  MPICH 3.1.4 compiled with GCC 4.9.3

    Linux 2.6.32-504.8.1.el6.ppc64 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-11)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-11)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-11)
                                  IBM XL C/C++ V13.1
                                  IBM XL Fortran V15.1

    Linux 3.10.0-229.14.1.el7   GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (kituo/moohan)                  Version 4.8.3 20140911 (Red Hat 4.8.3-9)
                                    Version 5.2.0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 15.0.3.187 Build 20150407
                                  MPICH 3.1.4 compiled with GCC 4.9.3

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc

    Windows 7                     Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015 w/ Intel Fortran 16 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 2.2.1(0.289/5/3) gcc(4.9.3) compiler and gfortran)
                                  (cmake and autotools)

    Windows 7 x64                 Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2015 w/ Intel Fortran 16 (cmake)

    Windows 8.1                   Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Windows 8.1 x64               Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Mac OS X Mt. Lion 10.8.5      Apple clang/clang++ version 5.1 from Xcode 5.1
    64-bit                        gfortran GNU Fortran (GCC) 4.8.2
    (swallow/kite)                Intel icc/icpc/ifort version 15.0.3

    Mac OS X Mavericks 10.9.5     Apple clang/clang++ version 6.0 from Xcode 6.2.0
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (wren/quail)                  Intel icc/icpc/ifort version 15.0.3

    Mac OS X Yosemite 10.10.5     Apple clang/clang++ version 6.0 from Xcode 7.0.0
    64-bit                        gfortran GNU Fortran (GCC) 4.9.2
    (osx1010dev/osx1010test)      Intel icc/icpc/ifort version 15.0.3

Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
SunOS 5.11 32-bit                       n        y/y    n        y    y     y
SunOS 5.11 64-bit                       n        y/y    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/y    n        y    y     n
Windows 8.1                             n        y/y    n        y    y     y
Windows 8.1 x64                         n        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.5 64-bit    n        y/y    n        y    y     y
Mac OS X Mavericks 10.9.5 64-bit        n        y/y    n        y    y     y
Mac OS X Yosemeti 10.10.5 64-bit        n        y/y    n        y    y     y
AIX 6.1 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 GNU      y        y/y    y        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.7 Linux 2.6.32 x86_64 PGI      n        y/y    n        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 GNU      y        y/y    y        y    y     y
CentOS 7.1 Linux 3.10.0 x86_64 Intel    n        y/y    n        y    y     y
Linux 2.6.32-431.11.2.el6.ppc64         n        y/n    n        y    y     y

Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
SunOS 5.11 32-bit                          y       y         y         y
SunOS 5.11 64-bit                          y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 8.1                                y       y         y         y
Windows 8.1 x64                            y       y         y         y
Mac OS X Mountain Lion 10.8.5 64-bit       y       n         y         y
Mac OS X Mavericks 10.9.5 64-bit           y       n         y         y
Mac OS X Yosemeti 10.10.5 64-bit           y       n         y         y
AIX 6.1 32- and 64-bit                     y       n         n         y
CentOS 6.7 Linux 2.6.32 x86_64 GNU         y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 Intel       y       y         y         y
CentOS 6.7 Linux 2.6.32 x86_64 PGI         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 GNU         y       y         y         y
CentOS 7.1 Linux 3.10.0 x86_64 Intel       y       y         y         y
Linux 2.6.32-431.11.2.el6.ppc64            y       y         y         y

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.18-431.11.2.el6     g95 (GCC 4.0.3 (g95 0.94!)
    #1 SMP x86_64 GNU/Linux
    (platypus)

    Mac OS X El Capitan 10.11     Apple clang/clang++ version 7.0.0 from Xcode 7.0.1
    64-bit                        gfortran GNU Fortran (GCC) 5.2.0
    (VM)

    Windows 7                     Visual Studio 2008  (cmake)

    Windows 7 x64                 Visual Studio 2008  (cmake)

    Windows 10                    Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Windows 10 x64                Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Debian7.5.0 3.2.0-4-amd64 #1 SMP Debian 3.2.51-1 x86_64 GNU/Linux
                                  gcc (Debian 4.7.2-5) 4.7.2
                                  GNU Fortran (Debian 4.7.2-5) 4.7.2
                                  (cmake and autotools)

    Fedora20 3.15.3-200.fc20.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.8.3 20140624 (Red Hat 4.8.3-1)
                                  GNU Fortran (GCC) 4.8.3 20140624 (Red Hat 4.8.3-1)
                                  (cmake and autotools)

    SUSE 13.1 3.11.10-17-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.8.1
                                  GNU Fortran (SUSE Linux) 4.8.1
                                  (cmake and autotools)

    Ubuntu 14.04 3.13.0-35-generic #62-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.9.1-0ubuntu1) 4.9.1
                                  GNU Fortran (Ubuntu/Linaro 4.9.1-0ubuntu1) 4.9.1
                                  (cmake and autotools)

    hopper.nersc.gov              PrgEnv-gnu/5.2.40
                                  gcc (GCC) 4.9.2 20141030 (Cray Inc.)
                                  GNU Fortran (GCC) 4.9.2 20141030 (Cray Inc.)
                                  g++ (GCC) 4.9.2 20141030 (Cray Inc.)


Known Problems
==============
* On Windows platforms in debug configurations, the VFD flush1 tests will fail
  with the split and multi VFD drivers. These tests will display a modal debug
  dialog which must be answered or wait for the test timeout to expire.
  (ADB - 2014/06/23 - HDFFV-8851)

* CLANG compiler with the options -fcatch-undefined-behavior and -ftrapv
  catches some undefined behavior in the alignment algorithm of the macro DETECT_I
  in H5detect.c (Issue 8147).  Since the algorithm is trying to detect the alignment
  of integers, ideally the flag -fcatch-undefined-behavior shouldn't to be used for
  H5detect.c. In the future, we can separate flags for H5detect.c from the rest of
  the library. (SLU - 2013/10/16)

* Make provided by Solaris fails in "make check". Solaris users should use
  gmake to build and install the HDF5 software. (AKC - 2013/10/08 - HDFFV-8534)

* The C++ and FORTRAN bindings are not currently working on FreeBSD with the
  native release 8.2 compilers (4.2.1), but are working with gcc 4.6 from the
  ports (and probably gcc releases after that).
  (QAK - 2012/10/19)

* The following h5dump test case fails in BG/P machines (and potentially other
  machines that use a command script to launch executables):

   h5dump --no-compact-subset -d "AHFINDERDIRECT::ah_centroid_t[0] it=0 tl=0"
     tno-subset.h5

  This is due to the embedded spaces in the dataset name being interpreted
  by the command script launcher as meta-characters, thus passing three
  arguments to h5dump's -d flag. The command passes if run by hand, just
  not via the test script.
  (AKC - 2012/05/03)

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14 - HDFFV-8235)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the Fortran and HL/Fortran
  tests fail. HL and C++ shared libraries should now be working as intended,
  however.
  (MAM - 2011/04/20)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* All of the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian systems. Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)


%%%%1.8.15%%%%


HDF5 version 1.8.15 released on 2015-05-04
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.14 and
HDF5-1.8.15, and contains information on the platforms tested and
known problems in HDF5-1.8.15.

Links to the HDF5 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for HDF5 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document at this location:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.14
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Configuration
    -------------
    - CMake

      Improvements made to the CMake build system.

      The default options were changed to align with the Autotools configure
      defaults. CMake configure files now support components when packaged
      with CPack. Windows CPack supports WiX packaging, and will look for
      WiX and NSIS in the standard locations.

      The CMake minimum has been changed to 3.1.

      (ADB - 2015/04/01 HDFFV-8074, 8968, 9006)

    - cmakehdf5 for Cmake building.
      Added configure options to support the building of Fortran or CXX API,
      to enable/disable testings. Use "cmakehdf5 --help" for details.
      (AKC - 2014/12/09 HDFFV-8932)

    - Building Shared and Parallel Made Explicit

      When --enable-parallel is specified, configure used to disable
      shared by default.

      Removed the restriction for building shared when parallel is
      enabled. --disable-shared has to be used explicitly if user
      wishes to disable shared libraries.

      (MSC - 2015/02/19 HDFFV-9069)

    - Inferring Parallel Compilers

      configure was trying to infer if a compiler is a parallel
      compiler with MPI support and enable parallel even if the user
      did not explicitly enable parallel. This should not happen.

      Disabled inferring parallel compilers to enable parallel HDF5
      build. --enable-parallel has to be used explicitly to build
      parallel HDF5 regardless of the compiler type being used.

      (MSC - 2015/02/19 HDFFV-9068)

    - Large File Support Configuration Option

      Removed the option to enable or disable large file support. It will
      always be enabled.

      (MSC - 2015/02/19 HDFFV-9097)

    - Removed Configuration Feature

      When configure detected that the CodeWarrior compiler was being used it
      would define a symbol that caused a test in test/tfile.c to be skipped
      due to a broken CodeWarrior open() command.

      Since this only masks the problem instead of fixing it and we don't
      support CodeWarrior anyway, this functionality was removed.

      (DER - 2015/02/21, HDFFV-9080)

    - VMS Build/Test Files Have Been Removed

      HDF5 no longer supports VMS, and the files were getting out of date.
      Since we have no access to a VMS machine, there is no way for us to
      maintain them.

      A Subversion tag was created at:

        https://svn.hdfgroup.uiuc.edu/tags/vms_last_support_1_8

      immediately before removing the files.

      (DER - 2015-02-26, HDFFV-9147)

    - Removal of --with-default-vfd configure Option

      In theory, this option was intended to allow setting a default
      VFD that would be used by the library. In practice, the feature
      only accepted the POSIX (SEC2) VFD (already the default) and
      the stdio VFD (a demo VFD not intended for production use). The
      inability to pass key VFD parameters at configure time limits the
      full implementation of this feature, so it was retired.

      (DER - 2015-02-26, HDFFV-9081)

    - Direct VFD configure Behavior

      The configure options for Linux now allow the Direct VFD to build
      without passing additional compiler options/defines like _GNU_SOURCE.
      Passing --enable-direct-vfd is now all that is needed to enable
      the feature.

      The Direct VFD is now disabled by default since it is intended for
      specialized audiences. It was previously enabled by default, but the
      configure script did not set correct POSIX levels, etc. making this
      a moot point.

      Note that the Direct VFD can only be configured on Linux when
      the O_DIRECT flag to open()/create() and posix_memalign() function
      are available. This is unchanged from previous behavior.

      (DER - 2015-02-26, HDFFV-9057, 7567, 9088, 7566)

    - _POSIX_C_SOURCE, _GNU_SOURCE, and _BSD_SOURCE No Longer Exported
      to h5cc and Other Compiler Wrappers

      The _POSIX_C_SOURCE, _GNU_SOURCE, and _BSD_SOURCE definitions are
      not required for using API functions and may conflict with user
      code requirements.

      (DER - 2015-03-08, HDFFV-9152)

    - Removed the --enable-filters Option from configure

      This option allowed the user to disable selected internal filters,
      presumably to make the library smaller. It has been removed since
      it saved little space (the internal filters are small with respect
      to the overall library size) and was not generally extendible to
      the library at large due to the large number of #ifdefs that would
      be required.

      Note that this features applied to internal filters such as shuffle
      and n-bit and not external filters like gzip or Szip. Those are still
      enabled or disabled via their own configure options.

      (DER - 2015-03-08, HDFFV-9086)

    - Removed Obsolete Time Functionality from configure and the C Library

      The library contained some residual functionality from obsolete
      time zone handling code. This has been removed, and the configure
      checks for the time functions have been cleaned up.

      * Lumped all the time functionality together in configure.ac.
        This was previously more spread out due to Solaris issues
        with the ordering of certain checks.

      * Removed processing that handles __tm_gmtoff members of struct
        tm. (libc-4)

      * Removed BSDgettimeofday(). (IRIX 5.3)

      * Removed timezone struct handling in gettimeofday() (considered
        harmful).

      Note that the HDF5 Library stores timestamps in a platform-independent
      manner, so old files can still be read. This only affects converting
      system time to HDF5 timestamps.

      The library currently uses the tm_gmtoff member of the tm struct
      (preferred, if available) or the timezone global variable to
      construct HDF5 timestamps.

      (DER - 2015-03-09, HDFFV-9083 and 9085)

    - Added -D_DEFAULT_SOURCE to CPPFLAGS on Linux Systems

      This is the replacement for -D_BSD_SOURCE in versions of glibc since 2.19.
      Since both are defined, it should work for all versions of glibc. Defining
      both suppresses the warning about defining _BSD_SOURCE.

      (NAF - 2015-04-02, HDFFV-9079)

    Library
    -------
    - Added Memory Allocation Functions that Use the Library's Allocator

      HDF5 filters may need to allocate or resize the buffer that is passed
      to them from the library. If the filter has been compiled separately
      from the library, it and the library may use different memory
      allocation libraries for the (re)allocation and free calls. This can
      cause heap corruption and crashes. This is particularly a problem on
      Windows since each C run-time library is implemented as a separate
      shared library, but can also show up on POSIX systems when debug or
      high-performance allocation libraries are in use.

      Two new functions (H5allocate_memory() and H5resize_memory()) were
      added to the HDF5 C library. These functions have the same semantics as
      malloc/calloc and realloc, respectively. Their primary purpose is to
      allow filter authors to allocate or resize memory using the same
      memory allocation library as the HDF5 library. Filter authors are
      highly encouraged to use these new functions in place of malloc,
      calloc, and realloc. They should also use the H5free_memory() call when
      freeing memory.

      Note that the filters provided with the library (zlib, szip, etc.) do
      not experience the problems that these new functions are intended to
      fix. This work only applies to third-party filters that are compiled
      separately from the library.

      (DER - 2015-04-01, HDFFV-9100)

    - H5Pset_istore_k and H5Pset_sym_k

      These two functions didn't check the value of the input parameter "ik".
      When 2*ik exceeded 2 bytes of storage, data was lost in the file;
      for example, some chunks would be overwritten.

      Added validation of "ik" to not exceed the max v1 btree entries (2 bytes)
      to these two routines.

      (VC - 2015-03-24, HDFFV-9173)

    - Added Functions to Control the Value of H5PL_no_plugin_g without
      Using an Environment Variable

      Sometimes it is necessary for an application to disable the use of
      dynamically loaded plugin libraries without requiring the library to
      be built with plugin support disabled or to set an environment
      variable to disable plugin support globally.

      Two new functions (H5PLset_loading_state() and H5PLget_loading_state())
      were added to the HDF5 C Library. These functions require a parameter
      that indicates which type of dynamically loaded plugin is enabled or
      disabled.

      (ADB - 2015-03-17, HDFFV-8520)

    Parallel Library
    ----------------
    - MPI_Finalize and HDF5 Library Shutdown

      Calling HDF5 routines after MPI_Finalize has been closed should
      not be done, since those routines might call MPI functions that
      would not be possible to do after finalizing the MPI library.

      Attached an attribute destroy callback to MPI_COMM_SELF that
      shuts down the HDF5 library when MPI_COMM_SELF is destroyed,
      in other words, on MPI_Finalize. This should fix several issues
      that users see when they forget to close HDF5 objects before
      calling MPI_Finalize().

      (MSC - 2015/02/25, HDFFV-883)

    Tools
    -----
    - None

    High-Level APIs
    ---------------
    - None

    Fortran API
    -----------
    - Added Global Variables

      These new global variables are equivalent to the C definitions
      without the '_F':

      H5G_UDLINK_F
      H5G_SAME_LOC_F
      H5O_TYPE_UNKNOWN_F
      H5O_TYPE_GROUP_F
      H5O_TYPE_DATASET_F
      H5O_NAMED_DATATYPE_F
      H5O_TYPE_NTYPES_F

      (MSB - 2015/02/03, HDFFV-9040)


    C++ API
    -------
    - New Wrappers for C Functions H5P[s/g]et_libver_bounds

      Wrappers were added to class H5::FileAccPropList for the
      C Functions H5Pget_libver_bounds and H5Pset_libver_bounds.

      (BMR, 2015/04/06, Part of HDFFV-9167)

    - New Wrappers to Get the Object Header's Version

      The following wrappers are added to class H5::CommonFG
      Returns the object header version of an object in a file or group,
      given the object's name.

      unsigned childObjVersion(const char* objname) const;
      unsigned childObjVersion(const H5std_string& objname) const;

      (BMR, 2015/04/06)

    - New DataType Constructor

      Added a DataType constructor that takes a PredType object, and this
      constructor will invoke H5Tcopy to generate another datatype id
      from a predefined datatype.

      (BMR, 2015/04/06)


Support for New Platforms, Languages, and Compilers
===================================================
    - Support for Linux 3.10.0-123.20.1.el7 added (LK - 2015/04/01)
    - Support for Mac OS X Yosemite 10.10 added (AKC - 2015/03/04, HDFFV-9007)
    - Support for AIX 6.1 added and AIX 5.3 is retired. (AKC - 2015/01/09)

Bug Fixes since HDF5-1.8.14
===========================

    Configuration
    -------------
    - Make uninstall generated "test: argument expected".
      The error is due to $EXAMPLETOPDIR is used without setting a value first.

      Fixed by assign it with the proper value.

      (AKC - 2015/04/29, HDFFV-9298)

    - Windows Installer Incorrect Display of PATH Environment Variable

      In the Windows installer, the dialog box where the user can elect to
      add the product's bin path to the %PATH% environment variable displayed
      an incorrect path. This path was missing the C:\Program Files part
      and used the POSIX file separator '/' before the bin (<path>/bin,
      instead of <path>\bin).

      The dialog box text was changed to simply say that the product's bin
      path would be added instead of explicitly displaying the path.
      This is in line with most installers. The reason for not fixing the
      displayed path instead is that it is difficult to pass the correct
      path from CPack to the NSIS installer for display.

      Note that this was never a code issue - it was just a display
      problem. The installer always did the right thing when updating the
      environment variable.

      (DER - 2014/11/14, HDFFV-9016)

    Library
    -------
    - Incorrect Usage of List in CMake COMPILE_DEFINITIONS set_property

      The CMake command set_property with COMPILE_DEFINITIONS property
      needs a quoted semi-colon separated list of values. CMake will
      transform the list to a series of -D{value} for the compile.

      (ADB - 2014/12/09, HDFV-9041)

    - Fixed Compile Errors on Windows w/ Visual Studio and CMake When
      UNICODE is Defined

      The HDF5 Library could not be built on Windows with Visual Studio when
      UNICODE was defined. This was due to the incorrect use of the TEXT()
      macro and some Win32 API functions that take TCHAR parameters. The faulty
      code was a part of the filter plugin functionality. This was a
      compile-time error that only affected users who build HDF5 from source
      and define UNICODE, usually when HDF5 is being built as a part of a
      larger product. There were no run-time effects.

      These errors caused no problems when UNICODE was not defined. HDF5 is
      normally not built with UNICODE defined and the binaries were
      unaffected.

      The fix was to remove the TEXT() macro and explicitly use the
      'A' form of the Win32 API calls, which expect char strings instead of
      wchar_t strings.

      Note that HDF5 currently does not support Unicode file paths on Windows.

      (DER - 2015/02/22, HDFFV-8927)

    - Addition of Error Tracing Functionality to Several C API Calls

      A bug in a text processing script caused API calls that return a
      pointer to not receive error tracing macros/functionality.

      The bug has been corrected and error tracing functionality has been
      added to the affected API calls. These functions will now correctly
      print trace information when library errors are encountered.

      (DER - 2015/02/26, HDFFV-9141)

    - H5Rdereference Now Checks for HADDR_UNDEF or Uninitialized References

      When passed HADDR_UNDEF or uninitialized references, the previous
      behavior of H5Rdereference was to continue to process the reference
      as a valid address.

      H5Rdereference was changed to return immediately (with an error
      message) if the references are HADDR_UNDEF or uninitialized.

      (MSB - 2015/3/10, HDFFV-7959)

    - Fixed Bugs in H5Sextent_copy

      H5Sextent_copy would not free the previous extent, resulting in a memory
      leak.  Also, H5Sextent_copy would not update the number of elements
      selected if the selection was "all", causing various problems.  These
      issues have been fixed.

      (NAF - 2015/04/02)


    Parallel Library
    ----------------
    - Fixed a Potential Memory Error

      Fixed a potential memory error when performing parallel I/O on a
      dataset with a single chunk, and at least one process has nothing
      to do.

      (NAF - 2015/02/16)

    - Parallel Test Problem Fixed

      Fixed problem with parallel tests where they failed beyond a
      certain number of ranks. All tests should work for any arbitrary
      number of ranks.

      (MSC - 2014/11/06, HDFFV-1027,8962,8963)

    - MPE Support

      Enabling MPE was causing HDF5 build to fail. Support for it was
      dropped at some point in time.

      Fixed problem with enabling MPE. Users should use the community
      maintained MPE on github (http://git.mpich.org/mpe.git/).

      (MSC - 2015/02/20, HDFFV-9135)

    Performance
    -------------
    - None

    Tools
    -----
    - h5repack crashed on enumerated 8-bit type.

      Previous version 1.8.14 introduced an error that caused the reading
      of enumerated 8-bit type nested in compound type to fail.

      Fixed library code responsible for reading the particular type.
      (AKC - 2015.03/31, HDFFV-8667)

    - h52gif crashed non-8bit images.

      h52gif crashed if instructed to convert images other than 8bit images.

      h52gif could handle only 8bit images. Added code to detect non-8bit
      images and flag them as failure.  Update tool document page to reflect
      the limit.
      (AKC - 2015/03/31, HDFFV-8957)

    - perform/benchpar.c retired.

      benchpar.c has not been built for a long time and its original purpose
      is not needed any more.
      (AKC - 2014/12/19, HDFFV-8156)

    - Source perform/ directory moved to tools/perform.
      The perform directory is moved to tools/perform for easier maintenance.
      (AKC - 2014/12/17, HDFFV-9046)

    Fortran API
    ------------
    - Fortran Fails with --enable-fortran2003 and Intel 15.x Compilers

      Added BIND(C) to the offending APIs.

      The Fortran Library (--enable-fortran2003) now works using Intel 15.x
      without the need for any additional compilers flags.

      (MSB - 2015/1/26, HDFFV-9049)

    - h5tenum_insert_f Does Not Work with Default 8 Byte Integers
      (xlf compiler)

      In the Fortran 90 API, 'value' is no longer cast into the C int type.
      Therefore, if h5tenum_insert_f is passed an 8 byte integer (via -i8)
      then 'value' is written as the same type as the default Fortran
      integer type (which can be 8 bytes).

      A new Fortran 2003 API was added which is more in line with the C
      API and users are strongly encouraged to use the Fortran 2003 API
      instead of the Fortran 90 API.

      SUBROUTINE h5tenum_insert_f(type_id, name, value, hdferr)
      INTEGER(HID_T)  , INTENT(IN) :: type_id
      CHARACTER(LEN=*), INTENT(IN) :: name
      TYPE(C_PTR)     , INTENT(IN) :: value
      INTEGER, INTENT(OUT) :: hdferr

      (MSB - 2015/2/19, HDFFV-8908)

    - Some Fortran APIs Never Returned the Error State

      Some Fortran APIs never returned the error state: they
      would always return a positive number. The APIs include
      the following:

      h5fget_file_image_f
      h5lget_name_by_idx_f
      h5oget_comment_by_name_f

      They were corrected to return a negative number as described in
      the Reference Manual if an error occurred.

      (MSB - 2015/3/19, HDF5-239)

    - Fixed h5pget_class_f

      h5pget_class_f never correlated the class identifier to the property
      list class name as indicated in the HDF5 Reference Manual; it instead
      returned a property list class identifier as an INTEGER. The INTEGER
      needed to be of type INTEGER(HID_T) to be correct.

      The h5pget_class_f API was changed to return an INTEGER(HID_T)
      property list class identifier instead of an INTEGER. This mimics the
      intended behavior of the C API.

      (MSB - 2015/3/16, HDFFV5-9162)

    C++ API
    ------
    - Combined Two H5File::getObjCount Overloaded Methods

      The following two methods

      ssize_t getObjCount(unsigned types) const;
      ssize_t getObjCount() const;

      were combined into one:

      ssize_t getObjCount(unsigned types = H5F_OBJ_ALL) const;

      (BMR - 2015/04/06)

    - Many Warnings Were Removed

      Many warnings such as conversion, unused variables, missing base
      class initialization, and initializing base classes in wrong order
      were removed.

      (BMR, 2015/04/06)

    - Functionality Deprecation

      The following two constructors of classes AbstractDs, IdComponent,
      H5Location, and H5Object are no longer appropriate after the data member
      "id" had been moved from IdComponent to the sub-classes in previous
      releases.

      <Classname>(const hid_t h5_id);
      <Classname>(const <Classname>& original);

      The copy constructors were no-op and removed in 1.8.15.  The other
      constructors will be removed from 1.10 release, and then from 1.8.17
      if their removal does not cause any problems.

      (BMR, 2015-04-06)


    High-Level APIs:
    ------
    - Suppress Warnings from Flex/Bison-generated Code

      Warning suppression #pragmas, etc. have been added to H5LTparse.c and
      H5LTanalyze.c. We have no control over this code since it's created by
      a generator.

      (DER - 2015/03/08 - HDFFV-9149)

    - Changed hdf5_hl.h to Include the HDF5 Main Library "hdf5.h"

      User's no longer need to include both hdf5_hl.h and hdf5.h

      (MSB - 2015/2/14, HDFFV-8685)


    - H5PTcreate_fl Does Not Convert to Memory Datatype

      H5PTcreate_fl now converts to the table's native memory datatype
      to fix the problem of handling BE and LE packet tables.

      (MSB - 2015/2/26 - HDFFV-9042)

    - Fix for H5LT Attribute Functions

      H5LT attribute functions fail to create attributes whose name
      is a substring of an existing attribute.

      H5LT attribute functions can now create attributes whose name
      is a substring of an existing attribute.

      (MSB - 2015/2/24, HDFFV-9132)


    Fortran High-Level APIs:
    ------------------------

    - Internal Library Fix for Missing Argument Declaration

      In Interface block for h5tbmake_table_c, "max_char_size_field_names"
      is listed as an input, but in the argument definitions it is
      "INTEGER :: max_char_size". This caused no known problems with the
      Fortran HL API.

      Fixed missing argument definition.

      (MSB - 2015/2/18, HDFFV-8559)


    Testing
    -------
    - None


Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    AIX 6.1                       xlc/xlc_r 10.1.0.5
    (NASA G-ADA)                  xlC/xlC_r 10.1.0.5
                                  xlf90/xlf90_r 12.1.0.6

    Linux 2.6.18-308.13.1.el5PAE  GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP i686 i686 i386         compilers for 32-bit applications;
    (jam)                             Version 4.1.2 20080704 (Red Hat 4.1.2-55)
                                      Version 4.8.4, 4.9.2
                                  PGI C, Fortran, C++ Compilers for 32-bit
                                  applications;
                                      Version 14.10-0
                                  Intel(R) C, C++, Fortran Compiler for 32-bit
                                  applications;
                                      Version 15.0.1.133 (Build 20141023)

    Linux 2.6.18-371.6.1.el5      GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers for 64-bit applications;
    (koala)                           Version 4.1.2 20080704 (Red Hat 4.1.2-55)
                                      Version 4.8.4, 4.9.2
                                  Intel(R) C, C++, Fortran Compilers for
                                  applications running on Intel(R) 64;
                                      Version 15.0.1.133 Build 20141023

    Linux 2.6.32-431.11.2.el6     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus)                       Version 4.4.7 20120313
                                     Version 4.8.2, Version 4.9.2
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 14.10-0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 15.0.1.133 Build 20141023

    Linux 3.10.0-123.20.1.el7     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (moohan)                         Version 4.8.2 20140120 (Red Hat 4.8.2-16)
                                  Intel(R) C Intel(R) 64 Compiler XE for
                                  applications running on Intel(R) 64,
                                     Version 15.0.1.133 Build 20141023

    Linux 2.6.32-431.29.2.el6.ppc64 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
                                  IBM XL C/C++ V13.1
                                  IBM XL Fortran V15.1

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc

    Windows 7                     Visual Studio 2008  (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 1.7.34(0.285/5/3) gcc(4.9.2) compiler and gfortran)
                                  (cmake and autotools)

    Windows 7 x64                 Visual Studio 2008  (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Windows 8.1                   Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Windows 8.1 x64               Visual Studio 2012 w/ Intel Fortran 15 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 15 (cmake)

    Mac OS X Mt. Lion 10.8.5      Apple clang/clang++ version 5.1 from Xcode 5.1
    64-bit                  gfortran GNU Fortran (GCC) 4.8.2
    (swallow/kite)                Intel icc/icpc/ifort version 14.0.2

    Mac OS X Mavericks 10.9.5     Apple clang/clang++ version 6.0 from Xcode 6.1.1
    64-bit                  gfortran GNU Fortran (GCC) 4.8.2
    (wren/quail)                  Intel icc/icpc/ifort version 14.0.2

    Mac OS X Yosemite 10.10.2     Apple clang/clang++ version 6.0 from Xcode 6.1.1
    64-bit                  gfortran GNU Fortran (GCC) 4.9.2
    (osx1010dev/osx1010test)      Intel icc/icpc/ifort version 15.0.1


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
SunOS 5.11 32-bit                       n        y/y    n        y    y     y
SunOS 5.11 64-bit                       n        y/y    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/y    n        y    y     n
Windows 8.1                             n        y/y    n        y    y     y
Windows 8.1 x64                         n        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.5 64-bit    n        y/y    n        y    y     y
Mac OS X Mavericks 10.9.5 64-bit        n        y/y    n        y    y     y
Mac OS X Yosemeti 10.10.2 64-bit        n        y/y    n        y    y     y
AIX 6.1 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 GNU    y        y/y    y        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 Intel  n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 PGI    n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 GNU      n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 GNU      y        y/y    y        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 PGI      n        y/y    n        y    y     y
CentOS 7.0 Linux 3.10.0 x86_64 GNU      y        y/y    y        y    y     y
CentOS 7.0 Linux 3.10.0 x86_64 Intel    n        y/y    n        y    y     y
Linux 2.6.32-431.11.2.el6.ppc64         n        y/n    n        y    y     y

Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
SunOS 5.11 32-bit                          y       y         y         y
SunOS 5.11 64-bit                          y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 8.1                                y       y         y         y
Windows 8.1 x64                            y       y         y         y
Mac OS X Mountain Lion 10.8.5 64-bit       y       n         y         y
Mac OS X Mavericks 10.9.5 64-bit           y       n         y         y
Mac OS X Yosemeti 10.10.2 64-bit           y       n         y         y
AIX 6.1 32- and 64-bit                     y       n         n         y
CentOS 5.9 Linux 2.6.18-308 i686 GNU       y       y         y         y
CentOS 5.9 Linux 2.6.18-308 i686 Intel     y       y         y         n
CentOS 5.9 Linux 2.6.18-308 i686 PGI       y       y         y         n
CentOS 5.9 Linux 2.6.18 x86_64 GNU         y       y         y         y
CentOS 5.9 Linux 2.6.18 x86_64 Intel       y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 GNU         y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 Intel       y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 PGI         y       y         y         n
CentOS 7.0 Linux 3.10.0 x86_64 GNU         y       y         y         n
CentOS 7.0 Linux 3.10.0 x86_64 Intel       y       y         y         n
Linux 2.6.32-431.11.2.el6.ppc64            y       y         y         n

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.18-308.13.1.el5PAE  MPICH mpich 3.1.3 compiled with
    #1 SMP i686 i686 i386             gcc 4.9.2 and gfortran 4.9.2
    (jam)                         g95 (GCC 4.0.3 (g95 0.94!)

    Linux 2.6.18-431.11.2.el6     MPICH mpich 3.1.3 compiled with
    #1 SMP x86_64 GNU/Linux           gcc 4.9.2 and gfortran 4.9.2
    (platypus)                    g95 (GCC 4.0.3 (g95 0.94!)

    FreeBSD 8.2-STABLE i386       gcc 4.5.4 [FreeBSD] 20110526
    (loyalty)                     gcc 4.6.1 20110527
                                  g++ 4.6.1 20110527
                                  gfortran 4.6.1 20110527

    FreeBSD 8.2-STABLE amd64      gcc 4.5.4 [FreeBSD] 20110526
    (freedom)                     gcc 4.6.1 20110527
                                  g++ 4.6.1 20110527
                                  gfortran 4.6.1 20110527

    Debian7.5.0 3.2.0-4-amd64 #1 SMP Debian 3.2.51-1 x86_64 GNU/Linux
                                  gcc (Debian 4.7.2-5) 4.7.2
                                  GNU Fortran (Debian 4.7.2-5) 4.7.2
                                  (cmake and autotools)

    Fedora20 3.15.3-200.fc20.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.8.3 20140624 (Red Hat 4.8.3-1)
                                  GNU Fortran (GCC) 4.8.3 20140624 (Red Hat 4.8.3-1)
                                  (cmake and autotools)

    SUSE 13.1 3.11.10-17-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.8.1
                                  GNU Fortran (SUSE Linux) 4.8.1
                                  (cmake and autotools)

    Ubuntu 14.04 3.13.0-35-generic #62-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.9.1-0ubuntu1) 4.9.1
                                  GNU Fortran (Ubuntu/Linaro 4.9.1-0ubuntu1) 4.9.1
                                  (cmake and autotools)

    hopper.nersc.gov              PrgEnv-gnu/5.2.40
                                  gcc (GCC) 4.9.2 20141030 (Cray Inc.)
                                  GNU Fortran (GCC) 4.9.2 20141030 (Cray Inc.)
                                  g++ (GCC) 4.9.2 20141030 (Cray Inc.)


Known Problems
==============
* On Windows platforms in debug configurations, the VFD flush1 tests will fail
  with the split and multi VFD drivers. These tests will display a modal debug
  dialog which must be answered or wait for the test timeout to expire.
  (ADB - 2014/06/23 - HDFFV-8851)

* CLANG compiler with the options -fcatch-undefined-behavior and -ftrapv
  catches some undefined behavior in the alignment algorithm of the macro DETECT_I
  in H5detect.c (Issue 8147).  Since the algorithm is trying to detect the alignment
  of integers, ideally the flag -fcatch-undefined-behavior shouldn't to be used for
  H5detect.c. In the future, we can separate flags for H5detect.c from the rest of
  the library. (SLU - 2013/10/16)

* Make provided by Solaris fails in "make check". Solaris users should use
  gmake to build and install the HDF5 software. (AKC - 2013/10/08 - HDFFV-8534)

* The C++ and FORTRAN bindings are not currently working on FreeBSD with the
  native release 8.2 compilers (4.2.1), but are working with gcc 4.6 from the
  ports (and probably gcc releases after that).
  (QAK - 2012/10/19)

* The following h5dump test case fails in BG/P machines (and potentially other
  machines that use a command script to launch executables):

   h5dump --no-compact-subset -d "AHFINDERDIRECT::ah_centroid_t[0] it=0 tl=0"
     tno-subset.h5

  This is due to the embedded spaces in the dataset name being interpreted
  by the command script launcher as meta-characters, thus passing three
  arguments to h5dump's -d flag. The command passes if run by hand, just
  not via the test script.
  (AKC - 2012/05/03)

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14 - HDFFV-8235)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. the issue. HL and C++ shared libraries should now be
  working as intended, however.
  (MAM - 2011/04/20)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)


%%%%1.8.14%%%%


HDF5 version 1.8.14 released on 2014-11-12
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.13 and
HDF5-1.8.14, and contains information on the platforms tested and
known problems in HDF5-1.8.14.

All new and modified APIs are listed in the "HDF5 Software Changes
from Release to Release" document along with details about previous
releases at:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

Links to the HDF5 1.8.14 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.14 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.14 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.13
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Configuration
    -------------
    - bin/cmakehdf5 configures, builds and installs C, C++, Fortran and High
      level API's. (It used to build the C API only).
      (AKC 2014/10/17 HDFFV-8932).

    Library
    -------
    - None

    Parallel Library
    ----------------
     - Chunk Fill Writes Changed to Collective

      Slow performance in chunk fill writes. Chunk fills
      in the past were written independently by rank 0 one block
      at a time.

      Optimized the chunk fill write algorithm so that all
      chunk fill values will be written collectively in a single MPI-IO
      call. This should show a great performance improvement when
      creating chunked datasets in parallel when the chunk dimensions
      are fairly small.

      (MSC - 2014/08/22, HDFFV-8878)

    Tools
    -----
    - None

    High-level APIs
    ---------------
    - None

    Fortran API
    -----------
    - None

    C++ API
    -------
    - Initialization of Object IDs

      The data member "id" in classes that represent HDF5 objects were
      initialized to 0, which caused problem for some users.

      Replaced 0 with H5I_INVALID_HID to initialize these "id"s.  For the
      PropList class, H5P_DEFAULT is used instead of H5I_INVALID_HID.

      (BMR - 2014/09/30, HDFFV-4259)



Support for New Platforms, Languages, and Compilers
===================================================
    - None

Bug Fixes since HDF5-1.8.13
===========================

    Configuration
    -------------
    - CMake and SVN URLs

      The SVN URLs will be different when the HDF Group domain name changes.

      Removed the SVN URL references in the cacheinit.cmake and release_docs files.

      (ADB - 2014/10/27, HDFFV-8953)

    - CMake Packaging

      A Fortran module was not generated if the compiler was not F2003
      compliant.

      Removed the module name from the package list of Fortran modules because
      that module was never generated. This was only an issue for Fortran
      compilers that are not F2003 compatible.

      (ADB - 2014/10/16, HDFFV-8932)

    - Shared Library Interface Version Number (soname)

      In order to increase the maintainability of HDF5, an architectural
      change was made which required the renaming of several public symbols in
      H5Ppublic.h.

      The shared library interface version number ("soname") has been increased
      on account of these changes. For a full list of the changed symbols, see
      the interface compatibility report, which is available as a link off of
      the 'HDF5 Software Changes from Release to Release' document:

          http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

      (AKC - 2014/10/03, HDFFV-8937)

    - Configure Settings for Mac OSX Need Defaults for PROD_XXX, DEBUG_XXX,
      and PROFILE_XXX

      The configure setting files for Mac OSX (config/apple) did not
      have the default settings of PROD_XXX, DEBUG_XXX, PROFILE_XXX.

      Added the default settings. Mac platforms now builds library with
      "-O3" optimization when the default clang compiler is used.

      (AKC - 2014/10/01, HDFFV-8933)

    - CMake ConfigureChecks

      Two include files were missing from two C tests.

      Propagated the configure test changes to H5_LDOUBLE_TO_INTEGER_WORKS_TEST
      and H5_ULLONG_TO_LDOUBLE_PRECISION_TEST to ConfigureChecks.cmake (added
      stdlib.h and string.h in the HDFTests.c file).

      (ADB - 2014/09/02 HDFFV-8845)

    - CMake Parallel Test Missing

      The source file was removed in the previous release but the parallel
      test t_posix_compliant was not.

      Removed the t_posix_compliant parallel test from the library.

      (ADB - 2014/8/14 HDFFV-8880)

    - Autotools Reconfigure. Bison. Flex.

      The Bison and Flex files were out of date.

      Bison was upgraded to 2.7, and Flex was upgraded to 2.5.37. The
      bin/reconfigure script now will execute Bison and Flex and update
      the hl/src files.

      (ADB - 2014/06/16 HDFFV-8709)

    - Autotools Reconfigure. m4.

      The m4 macro processor was out of date.

      Reconfigured Autotools with m4 upgraded to 1.4.17.

      (ADB - 2014/06/12 HDFFV-8743)

    - Autotools: Modified configure to add an entry at the beginning of AM_LDFLAGS
      for the hdf5 install directory.  Without this entry the relink commands
      invoked by "make install" to create libraries dependent on libhdf5.so added
      a dependency on the first libhdf5.so found in any directory in AM_LDFLAGS
      regardless of its version.  (LRK - 2014/10/17 HDFFV-8944)

    - Changed Autotools Build Behavior. Fortran High-level Library.

      The Fortran high-level (HL) library did not compile if the default
      size of a REAL is DOUBLE PRECISION; the build would fail during
      compilation.

      Configure now checks to see if REAL is DOUBLE PRECISION, Fortran is
      enabled, and HL library is enabled. If this is true, then configure
      will stop with an error message.

      (MSB - 2014/8/11, HDFFV-8883/HDFFV-889)



    Library
    -------
    - Fixed Identifier Management Code

      Opening an object returns an identifier; closing the object should
      free up the identifier. A problem was found where the identifiers
      were not being freed up correctly.

      Fixed the problem so that identifiers that have been used can be
      used again after their object has been closed.

      (QAK - 2014/10/16, HDFFV-8930)

    - Removal of DllMain() from Static Windows Builds

      A DllMain() function was added in HDF5 1.8.13 in order to handle
      win32 thread cleanup. The preprocessor #ifdefs around the DllMain
      function allowed it to be compiled when the static library is built,
      which is incorrect behavior that can cause linkage problems in
      clients.

      The fix was to change the preprocessor #ifdefs to exclude compiling
      DllMain() in static builds. Our DllMain function is now only
      compiled when the shared, thread-safe library is built on Windows.

      (DER - 2014/06/13, HDFFV-8837)

    - Enforce Constraint on page_size Parameter in H5Pset_core_write_tracking()

      The reference manual states that the page_size parameter cannot be
      zero.

      This change checks the page_size parameter to see it is zero and
      returns an error code if it is.

      (DER - 2014/08/11, HDFFV-8891)

    - H5Ldelete_by_idx() fails on non-existent group name.
      (MSC - 2014/07/31, HDFFV-8888)

    - H5Ldelete_by_idx() Seg Fault on Non-existent Group Name

      If a non-existent group name was used by H5Ldelete_by_idx(), a
      segmentation fault would result.

      Bug was fixed.

      (MSC - 2014/07/31, HDFFV-8888)

    - Bug in Test When Building Parallel HDF5 on PVFS2

      There was a bug in a test when building Parallel HDF5 on PVFS2.

      The build now uses MPI_File_get_size() instead of stat().

      (MSC - 2014/07/14, HDFFV-8856)

    - MPI-IO Driver Tried to Allocate Space for Zero-length Dataset

      MPI-IO driver tried to allocate space for zero-length dataset
      and asserts.

      Fixed driver and added a regression test.

      (MSC - 2014/07/03, HDFFV-8761)


    Parallel Library
    ----------------
    - None

    Performance
    -------------
    - None

    Tools
    -----
    - None

    Fortran API
    -------
    - SIZEOF Replaced by C_SIZEOF and STORAGE_SIZE.

      The intrinsic function SIZEOF is non-standard and should be replaced with a
      standard intrinsic function.

      If the F2008 intrinsic C_SIZEOF and STORAGE_SIZE are available, then they will
      be used instead of the non-standard SIZEOF intrinsic, even when the SIZEOF
      function is available.

      (MSB - 2014/6/16, HDFFV-8653)

    - Non-functional API: h5pget_fill_value_f

      The Fortran wrapper h5pget_fill_value_f was calling the wrong C API.

      The correct C API, H5Pget_fill_value, is now called by the Fortran
      wrapper.

      (MSB - 2014/9/25, HDFFV-8879)

    - Interoperability with C HDF5: H5Literate and h5literate_f

      h5literate_f assumes the return value for the callback function to
      be of type int (or int_f in C). However, in the C wrapper the return
      value of H5Literate is type herr_t, and this could cause
      interoperability issues.

      The callback function should be declared INTEGER(C_INT) for
      portability. The tests were updated accordingly.

      (MSB - 2014/9/26, HDFFV-8909)

    - Interoperability with C HDF5: Constant INTEGER Parameters with the
      H5FD Interface

      Wrong type cast of constant Fortran INTEGER parameters was used.

      The following parameter constant types were changed from INTEGER to
      INTEGER(HID_T) to match the C types: H5FD_CORE, H5FD_FAMILY, H5FD_LOG,
      H5FD_MPIO, H5FD_MULTI, H5FD_SEC2, and H5FD_STDIO.

      Other internal 'int' types where changed to 'hid_t'; these are
      transparent to the user.

      (MSB - 2014/7/18, HDFFV-8748)

    C++ API
    ------
    - Memory Leaks

      There were several potential memory leaks in the library due to
      dynamically allocated strings not being freed when failure occurs.

      Applied user's patches to remove these potential memory leaks.

      (BMR - 2014/09/30, HDFFV-8928)

    - Disallow H5F_ACC_CREAT

      H5F_ACC_CREAT was included in the C++ API but the C library does not
      allow it at this time.

      Removed this flag from the functions in H5File class.

      (BMR - 2014/09/29, HDFFV-8852)

    - Missing Flags in Documentation: H5F_ACC_RDONLY and H5F_ACC_RDWR

      The H5F_ACC_RDONLY and H5F_ACC_RDWR flags were missing from the
      documentation of the H5File constructors.

      These two flags are now included in the documentation for opening
      files.

      (BMR - 2014/09/29, HDFFV-8852)

    High-level APIs:
    ------
    - Seg Faults in H5TBread_field_name and H5TBread_field_name_f

      When H5TBread_field_name or H5TBread_field_name_f were used to read a
      field and if the name of the field was wrong, a segmentation fault
      would result.

      Both C and Fortran APIs were fixed so they no longer seg fault if
      the name of the field is wrong, and both APIs return a negative
      value if the name of the field is wrong.

      (MSB - 2014/09/29, HDFFV-8912)

    - Possible Buffer Overflow in High-level (HL) APIs

      Multiple HL APIs (H5DSis_scale is one example) had issues:
        (1) The datatype from the file was re-used as the memory datatype,
            and
        (2) No effort was made to ensure that strings were actually
            null-terminated.

      All of the HL routines now check for NULL pointers, for null-terminated
      strings, and to see if string buffers are short enough not to overflow
      the buffer. The minimum length of the buffers is now used in strncmp
      to avoid overflow.

      (MSB - 2014/9/29, HDFFV-8670)

    - Behavior Change of H5LTdtype_to_text

      If a user buffer was passed in to H5LTdtype_to_text along with the
      length, then the function would not truncate at the end of the
      buffer, but would exceed the end of the user buffer.

      H5LTdtype_to_text was changed to truncate the string if the user
      buffer is too small.

      (MSB - 2014/9/29, HDFFV-8855)

    Fortran High-level APIs:
    ------
     - See entry for HDFFV-8912 above.

    Testing
    -------
    - A subtest in parallel h5diff (ph5diff) testing was bypassed for the
      local Linux 32 machine due to unknown issue in the previous version of
      Mpich. The failure no long exists in the current Mpich. Therefore the
      bypass is removed. (AKC - 2014/11/03 HDFFV-8954)

    - Fixed incorrect exit code values (was -1) in testframe which is commonly
      used by several test programs. (AKC - 2014/07/22 HDFFV-8881)

    - Fixed Incorrect Exit Code Values in Testframe
      The testframe which is commonly used by several test programs
      had some incorrect exit code values.  Fixed the incorrect exit code
      values.  (AKC - 2014/07/22, HDFFV-8881)

Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    AIX 5.3                       xlc 10.1.0.5
    (NASA G-ADA)                  xlC 10.1.0.5
                                  xlf90 12.1.0.6

    Linux 2.6.18-308.13.1.el5PAE  GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP i686 i686 i386         compilers for 32-bit applications;
    (jam)                             Version 4.1.2 20080704 (Red Hat 4.1.2-54)
                                      Version 4.8.2
                                  PGI C, Fortran, C++ Compilers for 32-bit
                                  applications;
                                      Version 13.7-0
                                  Intel(R) C, C++, Fortran Compiler for 32-bit
                                  applications;
                                      Version 14.0.2 (Build 20140120)

    Linux 2.6.18-371.6.1.el5      GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers for 64-bit applications;
    (koala)                           Version 4.1.2 20080704 (Red Hat 4.1.2-54)
                                      Version 4.8.2
                                  Intel(R) C, C++, Fortran Compilers for
                                  applications running on Intel(R) 64;
                                      Version 14.0.2 (Build 20140120)

    Linux 2.6.32-431.11.2.el6    GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus)                       Version 4.4.7 20120313
                                     Version 4.8.2
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 13.7-0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 14.0.2 (Build 20140120)

    Linux 2.6.32-431.29.2.el6.ppc64 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
                                  IBM XL C/C++ V13.1
                                  IBM XL Fortran V15.1

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc

    Windows 7                     Visual Studio 2008  (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2012 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 14 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 1.7.32(0.274/5/3) gcc(4.8.3) compiler and gfortran)
                                  (cmake and autotools)

    Windows 7 x64                 Visual Studio 2008  (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2012 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 14 (cmake)

    Windows 8.1                   Visual Studio 2012 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 14 (cmake)

    Windows 8.1 x64               Visual Studio 2012 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2013 w/ Intel Fortran 14 (cmake)

    Mac OS X Lion 10.7.5          Apple clang/clang++ version 3.0 from Xcode 4.6.1
    64-bit                        gfortran GNU Fortran (GCC) 4.8.2
    (duck)                        Intel icc/icpc/ifort version 13.0.3

    Mac OS X Mt. Lion 10.8.5      Apple clang/clang++ version 5.1 from Xcode 5.1
    64-bit                  gfortran GNU Fortran (GCC) 4.8.2
    (swallow/kite)                Intel icc/icpc/ifort version 14.0.2

    Mac OS X Mavericks 10.9.5     Apple clang/clang++ version 6.0 from Xcode 6.0.1
    64-bit                  gfortran GNU Fortran (GCC) 4.8.2
    (wren)                        Intel icc/icpc/ifort version 14.0.2


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
Solaris2.11 32-bit                      n        y/y    n        y    y     y
Solaris2.11 64-bit                      n        y/y    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/y    n        y    y     n
Windows 8.1                             n        y/y    n        y    y     y
Windows 8.1 x64                         n        y/y    n        y    y     y
Mac OS X Lion 10.7.5 64-bit             n        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.5 64-bit    n        y/y    n        y    y     y
Mac OS X Mavericks 10.9.5 64-bit        n        y/y    n        y    y     ?
AIX 5.3 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 GNU    y        y/y    y        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 Intel  n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 PGI    n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 GNU      n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 GNU      y        y/y    y        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 PGI      n        y/y    n        y    y     y
Linux 2.6.32-431.11.2.el6.ppc64         n        y/n    n        y    y     y

Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
Solaris2.11 32-bit                         y       y         y         y
Solaris2.11 64-bit                         y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 8.1                                y       y         y         y
Windows 8.1 x64                            y       y         y         y
Mac OS X Lion 10.7.5 64-bit                y       n         y         y
Mac OS X Mountain Lion 10.8.5 64-bit       y       n         y         y
Mac OS X Mavericks 10.9.5 64-bit           y       n         y         y
AIX 5.3 32- and 64-bit                     y       n         n         y
CentOS 5.9 Linux 2.6.18-308 i686 GNU       y       y         y         y
CentOS 5.9 Linux 2.6.18-308 i686 Intel     y       y         y         n
CentOS 5.9 Linux 2.6.18-308 i686 PGI       y       y         y         n
CentOS 5.9 Linux 2.6.18 x86_64 GNU         y       y         y         y
CentOS 5.9 Linux 2.6.18 x86_64 Intel       y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 GNU         y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 Intel       y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 PGI         y       y         y         n
Linux 2.6.32-431.11.2.el6.ppc64            y       y         y         n

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.18-308.13.1.el5PAE  MPICH mpich 3.1.2 compiled with
    #1 SMP i686 i686 i386             gcc 4.9.1 and gfortran 4.9.1
    (jam)                         g95 (GCC 4.0.3 (g95 0.94!)

    Linux 2.6.18-431.11.2.el6     MPICH mpich 3.1.2 compiled with
    #1 SMP x86_64 GNU/Linux           gcc 4.9.1 and gfortran 4.9.1
    (platypus)                    g95 (GCC 4.0.3 (g95 0.94!)

    FreeBSD 8.2-STABLE i386       gcc 4.5.4 [FreeBSD] 20110526
    (loyalty)                     gcc 4.6.1 20110527
                                  g++ 4.6.1 20110527
                                  gfortran 4.6.1 20110527

    FreeBSD 8.2-STABLE amd64      gcc 4.5.4 [FreeBSD] 20110526
    (freedom)                     gcc 4.6.1 20110527
                                  g++ 4.6.1 20110527
                                  gfortran 4.6.1 20110527

    Debian7.5.0 3.2.0-4-amd64 #1 SMP Debian 3.2.51-1 x86_64 GNU/Linux
                                  gcc (Debian 4.7.2-5) 4.7.2
                                  GNU Fortran (Debian 4.7.2-5) 4.7.2
                                  (cmake and autotools)

    Fedora20 3.15.3-200.fc20.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.8.3 20140624 (Red Hat 4.8.3-1)
                                  GNU Fortran (GCC) 4.8.3 20140624 (Red Hat 4.8.3-1)
                                  (cmake and autotools)

    SUSE 13.1 3.11.10-17-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.8.1
                                  GNU Fortran (SUSE Linux) 4.8.1
                                  (cmake and autotools)

    Ubuntu 14.04 3.13.0-35-generic #62-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.9.1-0ubuntu1) 4.9.1
                                  GNU Fortran (Ubuntu/Linaro 4.9.1-0ubuntu1) 4.9.1
                                  (cmake and autotools)

    Cray Linux Environment (CLE)  PrgEnv-pgi/4.2.34
    hopper.nersc.gov              pgcc 13.6-0 64-bit target on x86-64 Linux -tp istanbul
                                  pgf90 13.6-0 64-bit target on x86-64 Linux -tp istanbul
                                  pgCC 13.6-0 64-bit target on x86-64 Linux -tp istanbul


Known Problems
==============
* On cygwin platforms the feature to load dynamic filter libraries only looks
  for libraries with the a so extension. Support for cygwin cygxxx.dll libraries
  is planned for the next release.
  (ADB - 2014/11/04 - HDFFV-8736)

* On windows platforms in debug configurations, the VFD flush1 tests will fail
  with the split and multi VFD drivers. These tests will display a modal debug
  dialog which must be answered or wait for the test timeout to expire.
  The flush1 and flush2 tests will be skipped under debug for this release.
  (ADB - 2014/06/23 - HDFFV-8851)

* CLANG compiler with the options -fcatch-undefined-behavior and -ftrapv
  catches some undefined behavior in the alignment algorithm of the macro DETECT_I
  in H5detect.c (Issue 8147).  Since the algorithm is trying to detect the alignment
  of integers, ideally the flag -fcatch-undefined-behavior shouldn't to be used for
  H5detect.c. In the future, we can separate flags for H5detect.c from the rest of
  the library. (SLU - 2013/10/16)

* Make provided by Solaris fails in "make check". Solaris users should use
  gmake to build and install the HDF5 software. (AKC - 2013/10/08 - HDFFV-8534)

* The h5dump and h5diff utilities occasionally produce different output
  between Linux and Windows systems. This is caused by lower-level library
  routines that fail to write fill values to the user's buffer when reading
  unallocated chunks from datasets that have a fill value set to
  H5D_FILL_VALUE_DEFAULT. Due to platform differences the return of
  spurious data values has only been encountered on Windows 32-bit systems.
  (Issue HDFFV-8247; JP - 2013/03/27)

* The C++ and FORTRAN bindings are not currently working on FreeBSD with the
  native release 8.2 compilers (4.2.1), but are working with gcc 4.6 from the
  ports (and probably gcc releases after that).
  (QAK - 2012/10/19)

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14 - HDFFV-8235)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. We are looking into the issue. HL and C++ shared libraries
  should now be working as intended, however.
  (MAM - 2011/04/20)

* The --with-mpe configure option does not work with Mpich2.
  (AKC - 2011/03/10)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO.
  (CMC - 2009/04/28)

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)


%%%%1.8.13%%%%


HDF5 version 1.8.13 released on 2014-05-05
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.12 and
HDF5-1.8.13, and contains information on the platforms tested and
known problems in HDF5-1.8.13.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.13 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.13 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.13 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.13 (current
release) versus Release 1.8.12":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.12
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Configuration
    -------------
    - Autotools: Automake updated to 1.14.1 (ADB - 2014/04/08)

    - CMake: Moved minimum CMake version to 2.8.11 which enables better library
      include processing. (ADB - 2014/03/26)

    - When configuring a thread-safe HDF5 Library it is no longer necessary
      to specify --enable-threadsafe with --with-pthreads if the Pthreads
      library is in a standard location.  (DER - 2014/04/11 HDFFV-8693)

    Library
    -------
    - Added an H5free_memory API call. This should be used to free memory
      that has been allocated by HDF5 API calls. H5Tget_member_name and
      H5Pget_class_name are two examples. The main motivation for this call
      is Windows, where it is common for application code and the HDF5 Library
      to be using different C run-time libraries (CRT). Using the new call
      ensures that the same CRT handles both the allocation and free. This
      new function can also be useful in any case where the library uses a
      different memory manager than the application, such as when a debug
      memory manager is in use or when the HDF5 Library is wrapped for use
      in a managed language like Python or Java. Fixes HDFFV-7710, 8519,
      and 8851. (DER - 2014/04/11)

    - The Core VFD (aka Memory VFD) can now be configured to track dirty
      regions in the file and only write out the changed regions on
      flush/close. Additionally, a "page aggregation" size can be set that
      will aggregate small writes into larger writes. For example, setting
      a 1 MiB page aggregation size will logically partition the the
      in-memory file into 1 MiB pages that will be written out in their
      entirety if even a single byte is dirtied. The feature is controlled
      via the new H5Pset/get_core_write_tracking() API call. A new
      "core_paged" target has been added to the check-vfd target in
      test/Makefile.am that exercises the feature over all HDF5 VFD-aware
      tests. (DER - 2014/04/12)

    Parallel Library
    ----------------
    - Removed MPI-POSIX VFD, as it wasn't helping anyone and was just
      generating support questions. Application developers performing
      parallel I/O should always use the MPI-IO VFD.
     (QAK - 2014/03/28 HDFFV-8659)

    - Improved parallel I/O support to allow collective I/O on point
      selections. (QAK - 2014/03/15)

    Tools
    -----
    - None

    High-Level APIs
    ---------------
    - None

    Fortran API
    -----------
    - Wrappers h5pset_file_image_f and h5pget_file_image_f were added to the
      library. (MSB - 2014/1/2014)

    C++ API
    -------
    - The following new features are added:
      + Wrappers to class H5Object to get an object's name (HDFFV-8548).
            ssize_t getObjName(char *obj_name, size_t buf_size = 0)
            ssize_t getObjName(H5std_string& obj_name, size_t len = 0)
            H5std_string getObjName()
      + Wrappers to class H5CommonFG to get a child object's type from a
        group or file (HDFFV-8367).
            H5O_type_t childObjType(const H5std_string& objname)
            H5O_type_t childObjType(const char* objname)
            H5O_type_t childObjType(hsize_t index,
                H5_index_t index_type=H5_INDEX_NAME,
                H5_iter_order_t order=H5_ITER_INC, const char* objname=".")
      + Wrappers to class DSetMemXferPropList for setting/getting a transform
        property list (HDFFV-7907).
            DSetMemXferPropList(const char* expression);
            void setDataTransform(const char* expression)
            void setDataTransform(const H5std_string& expression)
            ssize_t getDataTransform(char* exp, size_t buf_size=0)
            H5std_string getDataTransform()
      + Wrapper to CompType for setting size to compound datatype (HDFFV-8642).
            void setSize(size_t size)
      + Overloaded functions to provide prototypes that declare constant
        arguments const (HDFFV-3384).  These include:
            DataSet::fillMemBuf
            DataSet::getVlenBufSize
            DataSpace::extentCopy
            DataType::commit
            FileAccPropList::setSplit
            H5File::getVFDHandle
      + Additional overload to class H5Location to get a comment as a char*
            ssize_t getComment(const char* name, size_t buf_size, char* comment)
      + Additional overloads to class Attribute to get an attribute's name for
        convenience:
            ssize_t getName(char* attr_name, size_t buf_size=0)
            ssize_t getName(H5std_string& attr_name, size_t buf_size=0)
            (BMR, 2014/04/15)
      + A static wrapper to Exception for printing the error stack without an
    instance of Exception
        static void printErrorStack(FILE* stream = stderr,
                        hid_t err_stack = H5E_DEFAULT);
        (BMR, 2014/04/25)


Support for New Platforms, Languages, and Compilers
===================================================
    Mac OS X 10.6 Snow Leopard is not supported by Apple any more. In view of
    the added support of Mac OS X 10.9, Mac OS X 10.6 is retired from HDF5
    supported platforms. (AKC - 2014/03/14 HDFFV-8704)

    Mac OS X 10.9 Mavericks is supported. (AKC - 2014/03/04 HDFFV-8694)


Bug Fixes since HDF5-1.8.12
===========================

    Configuration
    -------------
    - CMake: When CMake commands are executed individually on the command line
      and the external filters are being built, the CMAKE_BUILD_TYPE define
      must be set to the same value as the configuration
      (-DCMAKE_BUILD_TYPE:STRING=Release if using -C Release). This is needed
      by the the szip and zlib filter build commands. (ADB - HDFFV-8695)

    - CMake: Removed use of the XLATE_UTILITY program.
      (ADB - 2014/03/28 HDFFV-8640)

    - CMake: Added missing quotes in setting the CMAKE_EXE_LINKER_FLAGS for the
      MPI option. (ADB - 2014/02/27 HDFFV-8674)

    - CMake: Configuration of the HDF5 C++ or Fortran libraries with the
      thread-safety feature.

      C++ and/or Fortran + thread-safe is enforced as a non-supported
      configuration. This matches the autotools. (DER - 2014/04/11)

    - CMake: Configuration of static HDF5 C library with the thread-safety
      feature.

      Static + thread-safe + Win32 threads is not a supported configuration
      due to the inability to automatically clean up thread-local storage.
      This is expected to be fixed in a future release. In the meantime, a
      work-around that uses internal functionality may allow the combination
      to be used without resource leaks. Contact the help desk for more
      information. (DER - 2014/04/11)

    - Autotools: Several changes were done to configure and installcheck.

      An export of LD_LIBRARY_PATH=<szip library location> was
      removed from configure; make installcheck was revised to run
      scripts installed in share/hdf5_examples to use the installed h5cc, etc.
      to compile and run example source files also installed there.

      Make installcheck will now fail when a shared szip or other external lib
      file cannot be found in the same manner that executables compiled and
      linked with h5cc will fail to run when those lib files cannot be found
      after install. Make installcheck should pass after setting
      LD_LIBRARY_PATH to the szip location. (LRK - 2014/04/16)

    Library
    -------
    - A Gnu Make directive (.NOTPARALLEL) is added to fortran/test/Makefile.

      AIX native make does not support this directive and would fail if
      parallel make (e.g. make -j4) is used to build the library. AIX users
      either do not use parallel make or install Gnu Make to build the library.
      (AKC 2014/04/08 HDFFV-8738)

    - H5R.c: H5Rget_name gave an assertion failure if the "name" parameter
      was NULL.

      Fixed H5Rget_name to return the size of the buffer needed to read a
      name of the referenced object in this case. The size doesn't include
      the NULL terminator. H5Rget_name returns negative on failure.
      (MSB - 2014/01/22 HDFFV-8620)

    - H5Z.c: H5Zfilter_avail didn't check if a filter was available as a
      dynamically loaded filter. The error manifested itself in the h5repack
      tool when removing user-defined dynamically loaded filter.

      Added a code to find the filter among the dynamically loaded filters
      after the function fails to find it among the registered filters.
      (ADB - 2014/03/03 HDFFV-8629)

    - Memory leak: a memory leak was observed in conjunction to the
      H5TS_errstk_key_g thread-local variable allocated in the H5E_get_stack
      function in H5E.c.

      The shared HDF5 thread-safe library now no longer leaks thread-local
      storage resources on Windows with Win32 threads. Currently, there is
      no solution for this problem when HDF5 is statically built. We
      disabled the build of the static HDF5 thread-safe library with
      Win32 threads. (DER - 2014/04/11 HDFFV-8518)

    - H5Dio.c: Improved handling of NULL pointers to H5Dread/H5Dwrite
      calls. Credit to Jason Newton (nevion@gmail.com) for the original patch.

      H5Dwrite/read failed when a NULL pointer was passed for a data buffer
      and 0 elements were selected. Fixed. (QAK - 2014/04/16 HDFFV-8705)

    - Deprecated API (1_6 API): Improved handling of closing the library and
      re-accessing it with a deprecated routine.

      When a program used a deprecated API (for example, H5Gcreate1),
      closed the library, and reopened it again to access a group, dataset,
      datatype, dataspace, attribute, or property list, HDF5 failed to
      provide an identifier for the object. Fixed.
      (NAF, QAK - 2014/04/16 HDFFV-8232)

    Parallel Library
    ----------------
    - Fixed a missing H5F_Provisional module in HDF5mpio.f90
      (MSB - 2014/2/7 HDFFV-8651)

    Performance
    -------------
    - None

    Tools
    -----
    - The h5diff tool would report that a datafile compared with an exact
      copy of the same datafile had differences. This was due to the issue
      below of reading un-written chunks. This problem is also fixed.
      (AKC - 2014/05/01 HDFFV-8637)

    - The h5dump and h5diff utilities occasionally produced different output
      between Linux and Windows systems. This has been fixed.

      This happened to datasets that used chunked storage, with default fill
      values, and some of the chunks had not been written.
      When the dataset was read, the library failed to write the default fill
      values to parts of the use buffer that were associated with the unwritten
      chunks.  (JP - 2014/05/01 HDFFV-8247)

    - The compress option is retired from bin/release.
      (AKC - 2014/04/25 HDFFV-8755)

    - bin/release has a new option "zip" that produces a release zip file for
      the Windows platform. (AKC - 2014/04/24 HDFFV-8433)

    - h5diff: Several failures relating to handling of strings attributes
      are fixed.

      The tool crashed or gave an error message when one of the strings had
      fixed size type and another variable-length size type. h5diff now flags such
      strings as "not comparable". We plan to enhance the tool to handle
      strings of the different types in the future releases.
      (AKC - 2014/04/18 HDFFV-8625, 8639, 8745)

    - h5repack: h5repack would not remove user-defined filters.
      Fixed by modifying h5repack to check if the filter is registered or
      can be dynamically loaded. (ADB - 2014/03/03 HDFFV-8629)

    F90 API
    -------
    - H5D_CHUNK_CACHE_NSLOTS_DFLT_F and H5D_CHUNK_CACHE_NBYTES_DFLT_F were
      changed from the default KIND for INTEGER to INTEGER of KIND size_t.
      (MSB - 2014/3/31 HDFFV-8689)

    C++ API
    ------
    - Added throw() to all exception destructors.  Credit to Jason Newton
      (nevion@gmail.com) for the patch.  (BMR - 2014/4/15 HDFFV-8623)
    - Changed the default value for H5Location::getComment from 256 to 0
      to conform to C function and because it makes more sense.
      (BMR - 2014/4/15)

    High-Level APIs:
    ------
    - None

    Fortran High-Level APIs:
    ------
    - None

    Testing
    -------
    - testhdf5 now exits with EXIT_SUCCESS(0) if no errors, else
      EXIT_FAILURE(1). (AKC - 2014/01/27 HDFFV-8572)

    - The big test now pays attention to the HDF5_DRIVER environment variable.
      Previously, it would run all tests with the family, stdio, and sec2
      virtual file drivers (VFDs) for each VFD in the check-vfd make target,
      regardless of the variable setting. It now checks the variable and
      either runs the appropriate VFD-specific tests or skips as needed.
      This saves much testing time. Fixes HDFFV-8554. (DER - 2014/04/11)

Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    AIX 5.3                       xlc 10.1.0.5
    (NASA G-ADA)                  xlC 10.1.0.5
                                  xlf90 12.1.0.6
                gmake v3.82

    Linux 2.6.18-308.13.1.el5PAE  GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP i686 i686 i386         compilers for 32-bit applications;
    (jam)                             Version 4.1.2 20080704 (Red Hat 4.1.2-54)
                                      Version 4.8.2
                                  PGI C, Fortran, C++ Compilers for 32-bit
                                  applications;
                                      Version 13.7-0
                                  Intel(R) C, C++, Fortran Compiler for 32-bit
                                  applications;
                                      Version 14.0.2 (Build 20140120)

    Linux 2.6.18-371.6.1.el5      GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers for 64-bit applications;
    (koala)                           Version 4.1.2 20080704 (Red Hat 4.1.2-54)
                                      Version 4.8.2
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 13.7-0
                                  Intel(R) C, C++, Fortran Compilers for
                                  applications running on Intel(R) 64;
                                      Version 14.0.2 (Build 20140120)

    Linux 2.6.32-431.11.2.el6    GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus)                       Version 4.4.7 20120313
                                     Version 4.8.2
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 13.7-0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 14.0.2 (Build 20140120)

    Linux 2.6.32-431.11.2.el6.ppc64 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
                                  IBM XL C/C++ V11.1
                                  IBM XL Fortran V13.1

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc

    Windows 7                     Visual Studio 2008 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2012 w/ Intel Fortran 14 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 1.7.28(0.271/5/3) gcc(4.8.2) compiler and gfortran)
                                  (cmake and autotools)

    Windows 7 x64                 Visual Studio 2008 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 14 (cmake)
                                  Visual Studio 2012 w/ Intel Fortran 14 (cmake)

    Windows 8.1                   Visual Studio 2012 w/ Intel Fortran 14 (cmake)

    Windows 8.1 x64               Visual Studio 2012 w/ Intel Fortran 14 (cmake)

    Mac OS X Lion 10.7.3          Apple clang/clang++ version 3.0 from Xcode 4.6.1
    64-bit                        gfortran GNU Fortran (GCC) 4.6.2
    (duck)                        Intel icc/icpc/ifort version 13.0.3

    Mac OS X Mt. Lion 10.8.5      Apple clang/clang++ version 5.0 from Xcode 5.0.2
    64-bit                  gfortran GNU Fortran (GCC) 4.8.2
    (swallow/kite)                Intel icc/icpc/ifort version 14.0.2

    Mac OS X Mavericks 10.9.2     Apple clang/clang++ version 5.1 from Xcode 5.1
    64-bit                  gfortran GNU Fortran (GCC) 4.8.2
    (wren/quail)                  Intel icc/icpc/ifort version 14.0.2


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
Solaris2.11 32-bit                      n        y/y    n        y    y     y
Solaris2.11 64-bit                      n        y/y    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/y    n        y    y     y
Windows 8.1                             n        y/y    n        y    y     y
Windows 8.1   x64                       n        y/y    n        y    y     y
Mac OS X Lion 10.7.3 64-bit             n        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.1 64-bit    n        y/y    n        y    y     y
Mac OS X Mavericks 10.9.1 64-bit        n        y/y    n        y    y     y
AIX 5.3 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 GNU    y        y/y    y        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 Intel  n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 PGI    n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 GNU      n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 GNU      y        y/y    y        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 PGI      n        y/y    n        y    y     y
Linux 2.6.32-431.11.2.el6.ppc64         n        y/n    n        y    y     y
OpenVMS IA64 V8.4                       n        y/n    n        y    y     n

Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
Solaris2.11 32-bit                         y       y         y         y
Solaris2.11 64-bit                         y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 8.1                                y       y         y         y
Windows 8.1 x64                            y       y         y         y
Mac OS X Lion 10.7.3 64-bit                y       n         y         y
Mac OS X Mountain Lion 10.8.1 64-bit       y       n         y         y
Mac OS X Mavericks 10.9.1 64-bit           y       n         y         y
AIX 5.3 32- and 64-bit                     y       n         n         y
CentOS 5.9 Linux 2.6.18-308 i686 GNU       y       y         y         y
CentOS 5.9 Linux 2.6.18-308 i686 Intel     y       y         y         n
CentOS 5.9 Linux 2.6.18-308 i686 PGI       y       y         y         n
CentOS 5.9 Linux 2.6.18 x86_64 GNU         y       y         y         y
CentOS 5.9 Linux 2.6.18 x86_64 Intel       y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 GNU         y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 Intel       y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 PGI         y       y         y         n
Linux 2.6.32-431.11.2.el6.ppc64            y       y         y         n
OpenVMS IA64 V8.4                          n       n         n         n

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.18-308.13.1.el5PAE  MPICH mpich 3.1 compiled with
    #1 SMP i686 i686 i386             gcc 4.8.2 and gfortran 4.8.2
    (jam)                         g95 (GCC 4.0.3 (g95 0.94!)

    Linux 2.6.18-431.11.2.el6     MPICH mpich 3.1 compiled with
    #1 SMP x86_64 GNU/Linux           gcc 4.8.2 and gfortran 4.8.2
    (platypus)                    g95 (GCC 4.0.3 (g95 0.94!)

    FreeBSD 8.2-STABLE i386       gcc 4.5.4 [FreeBSD] 20110526
    (loyalty)                     gcc 4.6.1 20110527
                                  g++ 4.6.1 20110527
                                  gfortran 4.6.1 20110527

    FreeBSD 8.2-STABLE amd64      gcc 4.5.4 [FreeBSD] 20110526
    (freedom)                     gcc 4.6.1 20110527
                                  g++ 4.6.1 20110527
                                  gfortran 4.6.1 20110527

    Debian7.1.0 3.2.0-4-amd64 #1 SMP Debian 3.2.51-1 x86_64 GNU/Linux
                                  gcc (Debian 4.7.2-5) 4.7.2
                                  GNU Fortran (Debian 4.7.2-5) 4.7.2
                                  (cmake and autotools)

    Fedora20 3.11.10-301.fc20.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.8.2 20131212 (Red Hat 4.8.2-7)
                                  GNU Fortran (GCC) 4.8.2 20130603 (Red Hat 4.8.2-7)
                                  (cmake and autotools)

    SUSE 13.1 3.11.6-4-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.8.1
                                  GNU Fortran (SUSE Linux) 4.8.1
                                  (cmake and autotools)

    Ubuntu 13.10 3.11.0-13-generic #20-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.8.1-10ubuntu8) 4.8.1
                                  GNU Fortran (Ubuntu/Linaro 4.8.1-10ubuntu8) 4.8.1
                                  (cmake and autotools)

    Cray Linux Environment (CLE)  PrgEnv-pgi/4.0.46
    hopper.nersc.gov              pgcc 12.5-0 64-bit target on x86-64 Linux -tp shanghai
                                  pgf90 12.5-0 64-bit target on x86-64 Linux -tp shanghai
                                  pgCC 12.5-0 64-bit target on x86-64 Linux -tp shanghai


Known Problems
==============
* When reading or writing a dataset (H5Dread/H5Dwrite) with a large selection
  size (e.g., 2GB ~= 500 million of 4 bytes integers or floating point
  numbers), some I/O systems may not be able to process it correctly.
  We advise users to find out system limits before using large selections. If
  I/O size limits exist, application should use HDF5 partial I/O capabilities
  (e.g., H5Sselect_hyperslab(...)) to divide large requests into smaller sizes.
  In this case we also advise users not to use chunk storage sizes larger that
  2GB since the HDF5 library performs I/O on the entire chunk.  We will work
  on the HDF5 library to divide large data requests to smaller I/O requests.
  (AKC 2014/05/02 HDFFV-8479)

* Due to an Intel compiler bug introduced in version 14.0.1, the HDF5 FORTRAN
  wrappers do not work with configure option --enable-fortran2003.
  However, the option --enable-fortran works with Intel 14.0.1. The compiler
  bug was fixed in Intel version 14.0.2 and resolved the issue.
  (MSB - 2014/4/15)

* Due to a PGI compiler bug introduced in versions before 13.3 and versions
  after 14.2, the FORTRAN test 'Testing get file image' will fail.
  (MSB - 2014/4/15)

* On CYGWIN, when building the library dynamically, testing will fail on
  dynamically loaded filters. The test process will build dynamic filter
  libraries with the *.dll.a extension, and the HDF5 Library will be looking
  for *.so libraries. Entered as issue HDFFV-8736. (ADB - 2014/04/14)

* A Gnu Make directive (.NOTPARALLEL) is added to fortran/test/Makefile.
  AIX native make does not support this directive and would fail if
  parallel make (e.g. make -j4) is used to build the library. AIX users
  either do not use parallel make or install Gnu Make to build the library.
  (AKC 2014/04/08 HDFFV-8738)

* CLANG compiler with the options -fcatch-undefined-behavior and -ftrapv
  catches some undefined behavior in the alignment algorithm of the macro
  DETECT_I in H5detect.c. Since the algorithm is trying to detect the alignment
  of integers, ideally the flag -fcatch-undefined-behavior should not to be
  used for H5detect.c. In the future, we can separate flags for H5detect.c
  from the rest of the library.  (SLU - 2013/10/16 HDFFV-8147)

* Make provided by Solaris fails in "make check". Solaris users should use
  gmake to build and install the HDF5 software. (AKC - 2013/10/08 - HDFFV-8534)

* On OpenVMS, two soft conversion functions (H5T__conv_i_f and H5T__conv_f_i)
  have bugs.  They convert data between floating-point numbers and integers.
  But the library's default is hard conversion.  The user should avoid
  explicitly enabling soft conversion between floating-point numbers and
  integers. (Issue VMS-8; SLU - 2013/09/19)

* On OpenVMS, ZLIB 1.2.8 library doesn't work properly.  ZLIB 1.2.5 works
  fine.  So please use ZLIB 1.2.5 to build HDF5 library. (Issue VMS-5;
  SLU 2013/09/19)

* When building using the Cray compilers on Cray machines, HDF5
  configure mistakenly thinks the compiler is an intel compiler and
  sets the -std=c99 flag which breaks configure on Cray. To build HDF5
  properly on a Cray machine, please consult with the instructions in
  INSTALL_parallel for building on Hopper.
  (MSC - 2013/04/26 - HDFFV-8429)

* The 5.9 C++ compiler on Sun failed to compile a C++ test ttypes.cpp.  It
  complains with this message:
      "/home/hdf5/src/H5Vprivate.h", line 130: Error: __func__ is not defined.

  The reason is that __func__ is a predefined identifier in C99 standard.  The
  HDF5 C library uses it in H5private.h.  The test ttypes.cpp includes
  H5private.h (H5Tpkg.h<-H5Fprivate.h<-H5Vprivate.h<-H5private.h).  Sun's 5.9
  C++ compiler doesn't support __func__, thus fails to compile the C++ test.
  But Sun's 5.11 C++ compiler does.  To check whether your Sun C++ compiler
  knows this identifier, try to compile the following simple C++ program:
      #include<stdio.h>

      int main(void)
      {
          printf("%s\n", __func__);
          return 0;
      }
  (SLU - 2012/11/5)

* The C++ and FORTRAN bindings are not currently working on FreeBSD with the
  native release 8.2 compilers (4.2.1), but are working with gcc 4.6 from the
  ports (and probably gcc releases after that).
  (QAK - 2012/10/19)

* The following h5dump test case fails in BG/P machines (and potentially other
  machines that use a command script to launch executables):

   h5dump --no-compact-subset -d "AHFINDERDIRECT::ah_centroid_t[0] it=0 tl=0"
     tno-subset.h5

  This is due to the embedded spaces in the dataset name being interpreted
  by the command script launcher as meta-characters, thus passing three
  arguments to h5dump's -d flag. The command passes if run by hand, just
  not via the test script.
  (AKC - 2012/05/03)

* On hopper, the build failed when RUNSERIAL and RUNPARALLEL are set
  to aprun -np X, because the H5lib_settings.c file was not generated
  properly. Not setting those environment variables works, because
  configure was able to automatically detect that it's a Cray system
  and used the proper launch commands when necessary.
  (MSC - 2012/04/18)

* The data conversion test dt_arith.c fails in "long double" to integer
  conversion on Ubuntu 11.10 (3.0.0.13 kernel) with GCC 4.6.1 if the library
  is built with optimization -O3 or -O2.  The older GCC (4.5) or newer kernel
  (3.2.2 on Fedora) doesn't have the problem.  Users should lower the
  optimization level (-O1 or -O0) by defining CFLAGS in the command line of
  "configure" like:

      CFLAGS=-O1 ./configure

  This will overwrite the library's default optimization level.
  (SLU - 2012/02/07 - HDFFV-7829)
  This issue is no longer present on Ubuntu 12.10 (3.5.0 kernel) with
  gcc 4.7.2.

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14 - HDFFV-8235)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* The C++ and FORTRAN bindings are not currently working on FreeBSD.
  (QAK - 2011/04/26)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. We are looking into the issue. HL and C++ shared libraries
  should now be working as intended, however.
  (MAM - 2011/04/20)

* The --with-mpe configure option does not work with Mpich2.
  (AKC - 2011/03/10)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO.
  (CMC - 2009/04/28)

* On an Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)


%%%%1.8.12%%%%


HDF5 version 1.8.12 released on 2013-11-04
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.11 and
HDF5-1.8.12, and contains information on the platforms tested and
known problems in HDF5-1.8.12.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.12 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.12 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.12 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.12 (current
release) versus Release 1.8.11":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.11
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Configuration
    -------------
    - Added a configuration option to change the default plugin path.
      The configure option is --with-default-plugindir=location.
      The cmake option is -DH5_DEFAULT_PLUGINDIR:PATH=location.
      HDFFV-8513.  (ADB 2013/09/04)
    - Renamed FFLAGS to FCFLAGS in configure. (ADB 2013/08/13)
    - CMake can now package a compressed examples file, the default for
      Windows binaries from HDF Group.  (ADB  - 2013/07/22)

    Library
    -------
    - None

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - h5repack: Added the ability to use plugin filters to read and write
              files. The option uses the filter number. HDFFV-8345
              (ADB - 2013/09/04).
    - h5dump: Added the option -N --any_path, which searches the file for
              paths that match the search path. HDFFV-7989 (ADB - 2013/08/12).
    - h5dump: Added the optional arg 0 to -A, which excludes attributes
              from display. HDFFV-8134 (ADB - 2013/08/01).

    High-Level APIs
    ---------------
    - None

    Fortran API
    -----------
    - None

    C++ API
    -------
    - Added tutorial examples to C++/examples.  They can be installed by
      "make install-examples" and, in the installed directory, they can be
      executed by running the script file run-c++-ex.sh. (BMR - 2013/09/28)
    - A new class, H5::H5Location, is added to represent the location concept
      in the C library.  It is a base class to H5::H5File and H5::H5Ojbect,
      whose member functions are moved into H5::H5Location.  H5::H5File can
      now inherent those functions.  As a result, an H5::H5File object can have
      an attribute. (BMR - 2013/09/27)
    - Added wrappers for H5Rget_obj_type2 to retrieve the type of the object
      that an object reference points to. (BMR - 2013/09/27)
    H5O_type_t H5Location::getRefObjType(void *ref, H5R_type_t ref_type)
    - Added wrappers for H5Aexist to check whether an attribute exists given
      a name. (BMR - 2013/09/27)
    bool H5::H5Location::attrExists(const char* name)
    bool H5::H5Location::attrExists(const H5std_string& name)
    - Added a number of overloaded functions for convenience. (BMR - 2013/09/27)


Support for New Platforms, Languages, and Compilers
===================================================
    - None

Bug Fixes since HDF5-1.8.11
===========================

    Configuration
    -------------
    - Modified H5detect.c to scan floating point types for padding bits before
      analyzing the type further.  This should fix problems with gcc 4.8.
      (NAF - 2013/09/19 - HDFFV-8523/HDFFV-8500)
    - HDF5 rpaths are no longer encoded in the library files when configured
      with --disable-sharedlib-rpath. (LRK-2013-09-23 - HDFFV-8276)

    Library
    -------
    - Added const qualifier to source buffer parameters in H5Dgather and
      H5D_scatter_func_t (H5Dscatter callback).  (NAF - 2013/7/09)

    - CMake now creates *.so.{lt_version} files with the same version as
      configure.  (ADB  - 2013/06/05 HDFFV-8437)

    Parallel Library
    ----------------
    - None

    Performance
    -------------
    - None

    Tools
    -----
    - h5dump: Added the option -N --any_path, which searches the file for
              paths that match the search path. HDFFV-7989 (ADB - 2013/08/12).
    - h5dump: Added the optional arg 0 to -A, which excludes attributes
              from display. HDFFV-8134 (ADB - 2013/08/01).
    - h5dump correctly exports subsetted data to a file, using the --output
      option.  (ADB  - 2013/06/07 HDFFV-8447)
    - h5cc and other compile scripts now default to linking shared libraries
      when HDF5 is configured with the --disable-static option.
      (LRK - 2013-09-23 - HDFFV-8141)

    F90 API
    -------
    - None

    C++ API
    ------
    - None

    High-Level APIs:
    ------
    - None

    Fortran High-Level APIs:
    ------
    - None

    Testing
    -------
    - test/big sometimes failed with the message of "file selection+offset not
      within extent". This has been fixed. (AKC - 2013/09/28 HDFFV-8271).
    - tools/h5diff/testh5diff.sh is run in every "make check", even after it
      has passed in the previous run. It should not run again if there are no
      code changes. Fixed. (AKC - 2013/07/19 HDFFV-8392)

Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    AIX 5.3                       xlc 10.1.0.5
    (NASA G-ADA)                  xlC 10.1.0.5
                                  xlf90 12.1.0.6

    Linux 2.6.18-308.13.1.el5PAE  GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP i686 i686 i386         compilers for 32-bit applications;
    (jam)                             Version 4.1.2 20080704 (Red Hat 4.1.2-54)
                                      Version 4.8.1
                                  PGI C, Fortran, C++ Compilers for 32-bit
                                  applications;
                                      Version 13.7-0
                                  Intel(R) C, C++, Fortran Compiler for 32-bit
                                  applications;
                                      Version 13.1.3 (Build 20130607)

    Linux 2.6.18-308.16.1.el5     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers for 64-bit applications;
    (koala)                           Version 4.1.2 20080704 (Red Hat 4.1.2-54)
                                      Version 4.8.1
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 13.7-0
                                  Intel(R) C, C++, Fortran Compilers for
                                  applications running on Intel(R) 64;
                                      Version 13.1.3 (Build 20130607)

    Linux 2.6.32-358.18.1.el6      GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus)                       Version 4.4.7 20120313
                                     Version 4.8.1
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 13.7-0
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 13.1.3 (Build 20130607)

    Linux 2.6.32-358.18.1.el6.ppc64 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
                                  IBM XL C/C++ V11.1
                                  IBM XL Fortran V13.1

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc

    Windows 7                     Visual Studio 2008 w/ Intel Fortran 11 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)
                                  Visual Studio 2012 w/ Intel Fortran 13 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 1.7.15(0.260/5/3) gcc(4.5.3) compiler and gfortran)
                                  (cmake and autotools)

    Windows 7 x64                 Visual Studio 2008 w/ Intel Fortran 11 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)
                                  Visual Studio 2012 w/ Intel Fortran 13 (cmake)

    Windows 8.1                   Visual Studio 2012 w/ Intel Fortran 13 (cmake)

    Windows 8.1 x64               Visual Studio 2012 w/ Intel Fortran 13 (cmake)

    Mac OS X Snow Leopard 10.6.8  gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    Darwin Kernel Version 10.8.0  g++ i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    64-bit                        gfortran GNU Fortran (GCC) 4.6.2
    (fred)                        Intel C (icc), Fortran (ifort), C++ (icpc)
                                      12.1 Build 20120928

    Mac OS X Lion 10.7.3          Apple clang/clang++ version 3.0 from Xcode 4.6.1
    64-bit                        gfortran GNU Fortran (GCC) 4.6.2
    (duck)                        Intel icc/icpc/ifort version 13.0.3

    Mac OS X Mountain Lion 10.8.1 Apple clang/clang++ version 4.2 from Xcode 4.6.1
    64-bit                        gfortran GNU Fortran (GCC) 4.6.2
    (wren)                        Intel icc/icpc/ifort version 13.0.3

    OpenVMS  IA64 V8.4            HP C V7.3-018
                                  HP Fortran V8.2-104939-50H96
                                  HP C++ V7.4-004

Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
Solaris2.11 32-bit                      n        y/y    n        y    y     y
Solaris2.11 64-bit                      n        y/y    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/n    n        y    y     y
Windows 8.1                             n        y/y    n        y    y     y
Windows 8.1   x64                       n        y/y    n        y    y     y
Mac OS X Snow Leopard 10.6.8 64-bit     n        y/y    n        y    y     y
Mac OS X Lion 10.7.3 64-bit             n        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.1 64-bit    n        y/y    n        y    y     y
AIX 5.3 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 GNU    y        y/y    y        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 Intel  n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 PGI    n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 GNU      y        y/y    y        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 Intel    n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 PGI      n        y/y    n        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 GNU      n        y/y    n        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
Linux 2.6.32-358.2.1.el6.ppc64          n        y/n    n        y    y     y
OpenVMS IA64 V8.4                       n        y/n    n        y    y     n

Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
Solaris2.11 32-bit                         y       y         y         y
Solaris2.11 64-bit                         y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 8.1                                y       y         y         y
Windows 8.1 x64                            y       y         y         y
Mac OS X Snow Leopard 10.6.8 64-bit        y       n         y         n
Mac OS X Lion 10.7.3 64-bit                y       n         y         y
Mac OS X Mountain Lion 10.8.1 64-bit       y       n         y         y
AIX 5.3 32- and 64-bit                     y       n         n         y
CentOS 5.9 Linux 2.6.18-308 i686 GNU       y       y         y         y
CentOS 5.9 Linux 2.6.18-308 i686 Intel     y       y         y         n
CentOS 5.9 Linux 2.6.18-308 i686 PGI       y       y         y         n
CentOS 5.9 Linux 2.6.18 x86_64 GNU         y       y         y         y
CentOS 5.9 Linux 2.6.18 x86_64 Intel       y       y         y         n
CentOS 5.9 Linux 2.6.18 x86_64 PGI         y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 GNU         y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 Intel       y       y         y         n
Linux 2.6.32-358.2.1.el6.ppc64             y       y         y         n
OpenVMS IA64 V8.4                          n       n         n         n

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.18-308.13.1.el5PAE  MPICH mpich2-1.4.1p1 compiled with
    #1 SMP i686 i686 i386             gcc 4.1.2 and gfortran 4.1.2
    (jam)                         g95 (GCC 4.0.3 (g95 0.94!)

    Linux 2.6.18-308.16.1.el5     MPICH mpich2-1.4.1p1 compiled with
    #1 SMP x86_64 GNU/Linux           gcc 4.1.2 and gfortran 4.1.2
    (koala)                       g95 (GCC 4.0.3 (g95 0.94!)

    FreeBSD 8.2-STABLE i386       gcc 4.5.4 [FreeBSD] 20110526
    (loyalty)                     gcc 4.6.1 20110527
                                  g++ 4.6.1 20110527
                                  gfortran 4.6.1 20110527

    FreeBSD 8.2-STABLE amd64      gcc 4.5.4 [FreeBSD] 20110526
    (freedom)                     gcc 4.6.1 20110527
                                  g++ 4.6.1 20110527
                                  gfortran 4.6.1 20110527

    Debian7.1.0 3.2.0-4-amd64 #1 SMP Debian 3.2.46-1 x86_64 GNU/Linux
                                  gcc (Debian 4.7.2-5) 4.7.2
                                  GNU Fortran (Debian 4.7.2-5) 4.7.2
                                  (cmake and autotools)

    Fedora19 3.11.1-200.fc19.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.8.1 20130603 (Red Hat 4.8.1-1)
                                  GNU Fortran (GCC) 4.8.1 20130603 (Red Hat 4.8.1-1)
                                  (cmake and autotools)

    SUSE 12.3 3.7.10-1.16-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.7.2
                                  GNU Fortran (SUSE Linux) 4.7.2
                                  (cmake and autotools)

    Ubuntu 13.04 3.8.0-30-generic #44-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3
                                  GNU Fortran (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3
                                  (cmake and autotools)

    Cray Linux Environment (CLE)  PrgEnv-pgi/4.0.46
    hopper.nersc.gov              pgcc 12.5-0 64-bit target on x86-64 Linux -tp shanghai
                                  pgf90 12.5-0 64-bit target on x86-64 Linux -tp shanghai
                                  pgCC 12.5-0 64-bit target on x86-64 Linux -tp shanghai


Known Problems
==============
* Several HDF5 command-line tools and tests leave behind generated files
  that are not cleaned up with "make clean" or "make distclean" when software
  is built in place. The issue will be addressed in the 1.8.13 release. We
  recommend to use build directory to compile and test HDF5 as described
  in the INSTALL file, section 4.2.

* Source directory names with spaces in them will cause failures in configure
  or make on Mac (HDFFV-8152), Linux, and probably all other platforms.  If a
  configure command with a space is run from a build directory, it will exit
  with an error message:  "checking whether build environment is sane...
  configure: error: unsafe srcdir value: '/scr/lrknox/hdf5 v1.8.12'".  If
  configure is run inside or below the directory with the space in the name,
  libtool will get the directory path from the system, put the part of the
  path before the space in the libdir variable in .../src/libhdf5.la, and
  then fail to find the nonexistent directory.  This is a known libtool issue
  and the suggested workaround is to rename the directory without spaces.
  (LRK - 2013/10/22)

* CLANG compiler with the options -fcatch-undefined-behavior and -ftrapv
  catches some undefined behavior in the alignment algorithm of the macro
  DETECT_I in H5detect.c (HDFFV-8147). This issue will be addressed in the
  next release.  (SLU - 2013/10/16)

* Running make check for the tools can fail in the tools tests if make was not
  run prior. The tests for the tools use other tools in the tests, therefore
  all the tools should be built before testing the tools. (ADB - 2013/10/09)

* Make provided by Solaris fails in "make check". Solaris users should use
  gmake to build and install HDF5 software. (AKC - 2013/10/08 - HDFFV-8534)

* On OpenVMS, two soft conversion functions (H5T__conv_i_f and H5T__conv_f_i)
  have bugs.  They convert data between floating-point numbers and integers.
  But the library's default is hard conversion.  The user should avoid
  explicitly enabling soft conversion between floating-point numbers and
  integers. (Issue VMS-8; SLU - 2013/09/19)

* On OpenVMS, ZLIB 1.2.8 library doesn't work properly.  ZLIB 1.2.5 works
  fine.  So please use ZLIB 1.2.5 to build HDF5 library. (Issue VMS-5;
  SLU 2013/09/19)

* When building using the Cray compilers on Cray machines, HDF5
  configure mistakenly thinks the compiler is an intel compiler and
  sets the -std=c99 flag which breaks configure on Cray. To build HDF5
  properly on a Cray machine, please consult with the instructions in
  INSTALL_parallel for building on Hopper.
  (MSC - 2013/04/26 - HDFFV-8429)

* The h5dump and h5diff utilities occasionally produce different output
  between Linux and Windows systems. This is caused by lower-level library
  routines that fail to write fill values to the user's buffer when reading
  unallocated chunks from datasets that have a fill value set to
  H5D_FILL_VALUE_DEFAULT. Due to platform differences the return of
  spurious data values has only been encountered on Windows 32-bit systems.
  (Issue HDFFV-8247; JP - 2013/03/27)

* The 5.9 C++ compiler on Sun failed to compile a C++ test ttypes.cpp.  It
  complains with this message:
      "/home/hdf5/src/H5Vprivate.h", line 130: Error: __func__ is not defined.

  The reason is that __func__ is a predefined identifier in C99 standard.  The
  HDF5 C library uses it in H5private.h.  The test ttypes.cpp includes
  H5private.h (H5Tpkg.h<-H5Fprivate.h<-H5Vprivate.h<-H5private.h).  Sun's 5.9
  C++ compiler doesn't support __func__, thus fails to compile the C++ test.
  But Sun's 5.11 C++ compiler does.  To check whether your Sun C++ compiler
  knows this identifier, try to compile the following simple C++ program:
      #include<stdio.h>

      int main(void)
      {
          printf("%s\n", __func__);
          return 0;
      }
  (SLU - 2012/11/5)

* The C++ and FORTRAN bindings are not currently working on FreeBSD with the
  native release 8.2 compilers (4.2.1), but are working with gcc 4.6 from the
  ports (and probably gcc releases after that).
  (QAK - 2012/10/19)

* The following h5dump test case fails in BG/P machines (and potentially other
  machines that use a command script to launch executables):

   h5dump --no-compact-subset -d "AHFINDERDIRECT::ah_centroid_t[0] it=0 tl=0"
     tno-subset.h5

  This is due to the embedded spaces in the dataset name being interpreted
  by the command script launcher as meta-characters, thus passing three
  arguments to h5dump's -d flag. The command passes if run by hand, just
  not via the test script.
  (AKC - 2012/05/03)

* On hopper, the build failed when RUNSERIAL and RUNPARALLEL are set
  to aprun -np X, because the H5lib_settings.c file was not generated
  properly. Not setting those environment variables works, because
  configure was able to automatically detect that it is a Cray system
  and used the proper launch commands when necessary.
  (MSC - 2012/04/18)

* The data conversion test dt_arith.c fails in "long double" to integer
  conversion on Ubuntu 11.10 (3.0.0.13 kernel) with GCC 4.6.1 if the library
  is built with optimization -O3 or -O2.  The older GCC (4.5) or newer kernel
  (3.2.2 on Fedora) do not have the problem.  Users should lower the
  optimization level (-O1 or -O0) by defining CFLAGS in the command line of
  "configure" like:

      CFLAGS=-O1 ./configure

  This will overwrite the library's default optimization level.
  (SLU - 2012/02/07 - HDFFV-7829)
  This issue is no longer present on Ubuntu 12.10 (3.5.0 kernel) with
  gcc 4.7.2.

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14 - HDFFV-8235)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* The C++ and FORTRAN bindings are not currently working on FreeBSD.
  (QAK - 2011/04/26)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. We are looking into the issue. HL and C++ shared libraries
  should now be working as intended, however.
  (MAM - 2011/04/20)

* The --with-mpe configure option does not work with Mpich2.
  (AKC - 2011/03/10)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO.
  (CMC - 2009/04/28)

* On an Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)


%%%%1.8.11%%%%


HDF5 version 1.8.11 released on 2013-05-08
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.10 and
HDF5-1.8.11-*, and contains information on the platforms tested and
known problems in HDF5-1.8.11-*.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.11 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.11 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.11 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.11 (current
release) versus Release 1.8.10":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.10
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Configuration
    -------------
    - Libtool version number is changed to 8.0.0 because there are API
      changes. See below for details. (AKC - 2013/05/07 HDFFV-8435)
    - Mac OS X 10.7 (Lion) and 10.8 (Mountain Lion) uses clang/clang++ as the
      default C and C++ compilers. (AKC - 2013/04/19 HDFFV-8245)
    - CMake minimum is now 2.8.10. (ADB 2013/1/14)
    - A new tool, cmakehdf5, which is a build command script similar to
      buildhdf5 is added and is available in the bin directory.
      (AKC - 2013/01/16 HDFFV-8336)

    Library
    -------
    - The library can load filter libraries dynamically during runtime.  Users
      can set the search path through environment variable HDF5_PLUGIN_PATH
      and call H5Pset_filter to enable a dynamic filter. (SLU - 2013/04/08)
    - Added new API functions H5Dscatter and H5Dgather to scatter data to and
      and gather data from a selection within a memory buffer.
      (NAF - 2013/02/05)
    - The library now supports the data conversion from enumeration to numeric
      (integer and floating-point number) datatypes. See Issue HDFFV-8221.
      (SLU - 2012/10/23)

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - h5dump: added new option -O or -ddl to output the ddl text to a file. This
      is a complement to the -o or --output option, which redirects the data to
      a file. HDFFV-8229 (ADB - 2013/2/25)

    High-Level APIs
    ---------------
    - A new API function, H5DOwrite_chunk.  This function writes a data chunk
      directly into a file, bypassing hyperslab selection, data conversion,
      and the filter pipeline.  The user must be careful with the function and
      clearly understand the I/O process of the library. (SLU - 2013/2/11)

    Fortran API
    -----------
    - New API functions added (MSB - 2013/3/23):

      h5odecr_refcount_f, h5oexists_by_name_f, h5oget_comment_f,
      h5oget_comment_by_name_f, h5oincr_refcount_f, h5oopen_by_idx_f,
      h5oset_comment_f, h5oset_comment_by_name_f, h5oset_comment_by_name_f

      F2003: h5oget_info_f, h5oget_info_by_idx_f, h5ovisit_by_name_f


    C++ API
    -------
    - None


Support for New Platforms, Languages, and Compilers
===================================================
    - SunOS 5.11 (emu) 32-bit and 64-bit with Sun C/C++ 5.12 compiler and
      Sun Fortran 95 8.6 compiler.
    - Visual Studio 2012 w/ Intel Fortran 13 on Windows 7
    - g95 released new version recently and is tested in this release.

Bug Fixes since HDF5-1.8.10
==========================

    Configuration
    -------------
    - Fixed Thread-safe configure failure for the AIX platform.
      (AKC - 2013/04/19 HDFFV-8390)
    - Configure will check the result of header searches before searching for
      the library.
      Fixes HDFFV-8257 (ADB 2013/03/04)
    - HDF does not support building SHARED Fortran libraries on OSX. Added
      CMake code to check for this condition.
      Fixes HDFFV-8227 (ADB 2013/03/04)
    - CMake builds on Windows will no longer use legacy naming for libraries.
      The "dll" tag will no longer be added to the name of *.lib and *.dll.
      The option HDF_LEGACY_NAMING is now OFF by default.
      Fixes HDFFV-8292 (ADB 2013/01/30)

    Library
    -------
    - The library now behaves correctly when performing large I/O operations
      on Mac OS-X.  Previously, single I/O operations > 2 GB would fail
      since the Darwin read/write calls cannot handle the number of bytes
      that their parameter types imply.
      Fixes HDFFV-7975 and HDFFV-8240 (DER 2013/01/07)
    - Fixed a bug in the core VFD that causes failures when opening files
      > 2 GB.
      Fixes HDFFV-8124 and HDFFV-8158 (DER 2013/01/07)
    - Fixed a bug where uninitialized memory was read during variable-length
      type conversion.  This caused segfaults in netCDF.  Fixes HDFFV-8159.
      (DER 2013/03/30)
    - Removed the H5Pset/get_dxpl_multi functions from the library.  The
      intended functionality for them was never fully implemented, and they
      have always been fundamentally broken.  NOTE: This does not affect
      setting the multi VFD or any expected VFD functionality.  Multi VFD
      usage remains unchanged.
      Fixes HDFFV-8296.  (DER 2013/03/30)

    Parallel Library
    ----------------
    - None

    Performance
    -------------
    - None

    Tools
    -----
    - h5redeploy is changed to do this by default:
        Installation directories:
        prefix       architecture-independent files.
        exec_prefix  architecture-dependent files, default is <prefix>.
        libdir       libraries, default is <exec_prefix>/lib.
        includedir   header files, default is <prefix/include>.
      This allows users to just change the first line of prefix=<...> and the
      effect will change libdir and includedir too.  (AKC 2013/04/05 HDFFV-8358)
    - h5repack: Fixed failure to convert the layout of a small chunked
      dataset (size < 1K) to contiguous layout.  HDFFV-8214 (JKM 2013/03/26)
    - h5dump: Fixed displaying compression ratio for unknown or user-defined
      filters. HDFFV-8344 (XCAO 2013/03/19)
    - h5dump: Changed UNKNOWN_FILTER to USER_DEFINED_FILTER for user defined
      filter. HDFFV-8346 (XCAO 2013/03/19)
    - h5diff: Fixed to return the correct exit code 1 when the program
      detects a unique extra attribute. Prior to this fix, h5diff returned
      exit code 0 indicating the two files are identical.
      HDFFV-7643 (JKM 2013/02/15)
    - h5dump: Fixed writing nulls to a binary file when exporting a dataset
      with compound string datatype. HDFFV-8169 (ADB 2013/1/31)
    - The following h5stat test case failed in BG/P machines (and potentially
      other machines that display extra output if an MPI task returns with a
      non-zero code.)
        Testing h5stat notexist.h5
      The test script was fixed to ignore the extra output.  HDFFV-8233
      (AKC - 2012/11/30)
    - h5diff: Improved speed when comparing HDF5 files with lots of
      attributes. Much slower performance was identified with release versions
      from 1.8.7 to 1.8.10 compared to 1.8.6. (JKM 2012/10/19)

    F90 API
    -------
    - The integer type of the 'offset' argument in h5pset_external_f and
      h5pget_external_f was changed to INTEGER(KIND=OFF_T) to support 8-byte
      integers, matching the C type definition of off_t. (MSB - 2013/3/23)
    - h5fc updated to recognize .f95, .f03 and .f08 file extensions.

    C++ API
    ------
    - The C++ wrappers DSetMemXferPropList::setMulti/getMulti were removed
      because the C functions H5Pset/get_dxpl_multi functions are removed
      from the library. Fixes HDFFV-8296 by DER.  (BMR 2013/03/30)
    - An exception thrown by an internal function was not propagating to the
      test program during stack unwinding, so it couldn't be caught by the
      test, and the program terminated "without an active exception."  It
      seemed that the problem happened when c_str() was used to generate
      an equivalent const char* from a std::string and the resulting string
      was passed to the internal function.  As a work-around, we added a
      try/catch around the the call to the internal function and when the
      exception is caught there, it is re-thrown.  Fixes HDFFV-8067.
      (BMR 2013/03/30)

    High-Level APIs:
    ------
    - Fixed a problem with H5DSget_scale_name including the NULL terminator
      in the size calculation returned by the function. The API was changed
      to NOT include the NULL terminator in the size of name returned
      (MSB- 2013/2/10)

    Fortran High-Level APIs:
    ------
    - None

    Testing
    -------
    - In some Mac systems, testlibinfo.sh failed with this error:
         Check file ../src/.libs/libhdf5.7.dylib
         strings: object: ../src/.libs/libhdf5.7.dylib malformed object \
         (unknown load command 15)
      The strings command of Mac systems inspects library files, and older
      versions of strings may not know newer library formats, resulting
      in errors.  Fixed by sending the library file as stdin to the strings
      command to avoid this problem. (AKC - 2013/03/08 HDFFV-8305)
    - Fixed a typo in the ERROR macro in test/testhdf5.h. It segmentation
      faulted when used before. (AKC - 2013/02/12 HDFFV-8267)

Supported Platforms
===================
The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

    AIX 5.3                       xlc 10.1.0.5
    (NASA G-ADA)                  xlC 10.1.0.5
                                  xlf90 12.1.0.6

    Linux 2.6.18-308.13.1.el5PAE  GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP i686 i686 i386         compilers for 32-bit applications;
    (jam)                             Version 4.1.2 20080704 (Red Hat 4.1.2-54)
                                      Version 4.6.3
                                  PGI C, Fortran, C++ Compilers for 32-bit
                                  applications;
                                      Version 11.9-0
                                      Version 12.5-0
                                  Intel(R) C, C++, Fortran Compiler for 32-bit
                                  applications;
                                      Version 12.1 (Build 20110811)
                                      Version 12.1 (Build 20120212)

    Linux 2.6.18-308.16.1.el5     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers for 64-bit applications;
    (koala)                           Version 4.1.2 20080704 (Red Hat 4.1.2-52)
                                      Version 4.6.3
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 11.9-0
                                      Version 12.5-0
                                  Intel(R) C, C++, Fortran Compilers for
                                  applications running on Intel(R) 64;
                                      Version 12.1 (Build 20110811)
                                      Version 12.1 (Build 20120212)

    Linux 2.6.32-358.2.1.el6      GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers:
    (platypus)                       Version 4.4.7 20120313
                                  Intel(R) C (icc), C++ (icpc), Fortran (icc)
                                  compilers:
                                     Version 12.1 20120212

    Linux 2.6.32-358.2.1.el6.ppc64 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
    (ostrich)                     GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
                                  IBM XL C/C++ V11.1
                                  IBM XL Fortran V13.1

    SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
    (emu)                         Sun Fortran 95 8.6 SunOS_sparc
                                  Sun C++ 5.12 SunOS_sparc

    Windows 7                     Visual Studio 2008 w/ Intel Fortran 11 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)
                                  Visual Studio 2012 w/ Intel Fortran 13 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 1.7.15(0.260/5/3) gcc(4.5.3) compiler and gfortran)
                                  (cmake and autotools)

    Windows 7 x64                 Visual Studio 2008 w/ Intel Fortran 11 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)
                                  Visual Studio 2012 w/ Intel Fortran 13 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 1.7.15(0.260/5/3) gcc(4.5.3) compiler and gfortran)
                                  (cmake and autotools)

    Mac OS X Snow Leopard 10.6.8  gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    Darwin Kernel Version 10.8.0  g++ i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    64-bit                        gfortran GNU Fortran (GCC) 4.6.2
    (fred)                        Intel C (icc), Fortran (ifort), C++ (icpc)
                                      12.1 Build 20120928

    Mac OS X Lion 10.7.3          Apple clang/clang++ version 3.0 from Xcode 4.6.1
    64-bit                        gfortran GNU Fortran (GCC) 4.6.2
    (duck)                        Intel icc/icpc/ifort version 13.0

    Mac OS X Mountain Lion 10.8.1 Apple clang/clang++ version 4.2 from Xcode 4.6.1
    64-bit                  gfortran GNU Fortran (GCC) 4.6.2
    (wren)                        Intel icc/icpc/ifort version 13.0.1.119


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
Solaris2.11 32-bit                      n        y/y    n        y    y     y
Solaris2.11 64-bit                      n        y/n    n        y    y     y
Windows 7                               y        y/y    n        y    y     y
Windows 7 x64                           y        y/y    n        y    y     y
Windows 7 Cygwin                        n        y/n    n        y    y     y
Windows 7 x64 Cygwin                    n        y/n    n        y    y     y
Mac OS X Snow Leopard 10.6.8 64-bit     n        y/y    n        y    y     y
Mac OS X Lion 10.7.3 64-bit             n        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.1 64-bit    n        y/y    n        y    y     y
AIX 5.3 32- and 64-bit                  n        y/n    n        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 GNU    y        y/y    y        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 Intel  n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18-308 i686 PGI    n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 GNU      y        y/y    y        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 Intel    n        y/y    n        y    y     y
CentOS 5.9 Linux 2.6.18 x86_64 PGI      n        y/y    n        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 GNU      n        y/n    n        y    y     y
CentOS 6.4 Linux 2.6.32 x86_64 Intel    n        y/y    n        y    y     y
Linux 2.6.32-358.2.1.el6.ppc64          n        y/n    n        y    y     y


Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
Solaris2.11 32-bit                         y       y         y         y
Solaris2.11 64-bit                         y       y         y         y
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Windows 7 Cygwin                           n       n         n         y
Windows 7 x64 Cygwin                       n       n         n         y
Mac OS X Snow Leopard 10.6.8 64-bit        y       n         y         n
Mac OS X Lion 10.7.3 64-bit                y       n         y         y
Mac OS X Mountain Lion 10.8.1 64-bit       y       n         y         y
AIX 5.3 32- and 64-bit                     y       n         n         y
CentOS 5.9 Linux 2.6.18-308 i686 GNU       y       y         y         y
CentOS 5.9 Linux 2.6.18-308 i686 Intel     y       y         y         n
CentOS 5.9 Linux 2.6.18-308 i686 PGI       y       y         y         n
CentOS 5.9 Linux 2.6.18 x86_64 GNU         y       y         y         y
CentOS 5.9 Linux 2.6.18 x86_64 Intel       y       y         y         n
CentOS 5.9 Linux 2.6.18 x86_64 PGI         y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 GNU         y       y         y         n
CentOS 6.4 Linux 2.6.32 x86_64 Intel       y       y         y         n
Linux 2.6.32-358.2.1.el6.ppc64             y       y         y         n

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    Linux 2.6.18-308.13.1.el5PAE  MPICH mpich2-1.4.1p1 compiled with
    #1 SMP i686 i686 i386             gcc 4.1.2 and gfortran 4.1.2
    (jam)                         g95 (GCC 4.0.3 (g95 0.94!)

    Linux 2.6.18-308.16.1.el5     MPICH mpich2-1.4.1p1 compiled with
    #1 SMP x86_64 GNU/Linux           gcc 4.1.2 and gfortran 4.1.2
    (koala)                       g95 (GCC 4.0.3 (g95 0.94!)

    FreeBSD 8.2-STABLE i386       gcc 4.2.1 [FreeBSD] 20070719
    (loyalty)                     gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    FreeBSD 8.2-STABLE amd64      gcc 4.2.1 [FreeBSD] 20070719
    (freedom)                     gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    Debian6.0.7 2.6.32-5-amd64 #1 SMP x86_64 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5
                                  (cmake and autotools)

    Fedora18 3.7.9-205.fc18.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.7.2 20121109 (Red Hat 4.7.2-8)
                                  GNU Fortran (GCC) 4.7.2 20120507 (Red Hat 4.7.2-8)
                                  (cmake and autotools)

    SUSE 12.3 3.7.10-1.1-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.7.2
                                  GNU Fortran (SUSE Linux) 4.7.2
                                  (cmake and autotools)

    Ubuntu 12.10 3.5.0-25-generic #39-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2
                                  GNU Fortran (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2
                                  (cmake and autotools)

    Cray Linux Environment (CLE)  PrgEnv-pgi/4.0.46
    hopper.nersc.gov              pgcc 12.5-0 64-bit target on x86-64 Linux -tp shanghai
                                  pgf90 12.5-0 64-bit target on x86-64 Linux -tp shanghai
                                  pgCC 12.5-0 64-bit target on x86-64 Linux -tp shanghai


Known Problems
==============

* When building using the Cray compilers on Cray machines, HDF5
  configure mistakenly thinks the compiler is an intel compiler and
  sets the -std=c99 flag which breaks configure on Cray. To build HDF5
  properly on a Cray machine, please consult with the instructions in
  INSTALL_parallel for building on Hopper.
  (MSC - 2013/04/26 - HDFFV-8429)

* The h5dump and h5diff utilities occasionally produce different output
  between Linux and Windows systems. This is caused by lower-level library
  routines that fail to write fill values to the user's buffer when reading
  unallocated chunks from datasets that have a fill value set to
  H5D_FILL_VALUE_DEFAULT. Due to platform differences the return of
  spurious data values has only been encountered on Windows 32-bit systems.
  (Issue HDFFV-8247; JP - 2013/03/27)

* The 5.9 C++ compiler on Sun failed to compile a C++ test ttypes.cpp.  It
  complains with this message:
      "/home/hdf5/src/H5Vprivate.h", line 130: Error: __func__ is not defined.

  The reason is that __func__ is a predefined identifier in C99 standard.  The
  HDF5 C library uses it in H5private.h.  The test ttypes.cpp includes
  H5private.h (H5Tpkg.h<-H5Fprivate.h<-H5Vprivate.h<-H5private.h).  Sun's 5.9
  C++ compiler doesn't support __func__, thus fails to compile the C++ test.
  But Sun's 5.11 C++ compiler does.  To check whether your Sun C++ compiler
  knows this identifier, try to compile the following simple C++ program:
      #include<stdio.h>

      int main(void)
      {
          printf("%s\n", __func__);
          return 0;
      }
  (SLU - 2012/11/5)

* The C++ and FORTRAN bindings are not currently working on FreeBSD with the
  native release 8.2 compilers (4.2.1), but are working with gcc 4.6 from the
  ports (and probably gcc releases after that).
  (QAK - 2012/10/19)

* The following h5dump test case fails in BG/P machines (and potentially other
  machines that use a command script to launch executables):

   h5dump --no-compact-subset -d "AHFINDERDIRECT::ah_centroid_t[0] it=0 tl=0"
     tno-subset.h5

  This is due to the embedded spaces in the dataset name being interpreted
  by the command script launcher as meta-characters, thus passing three
  arguments to h5dump's -d flag. The command passes if run by hand, just
  not via the test script.
  (AKC - 2012/05/03)

* On hopper, the build failed when RUNSERIAL and RUNPARALLEL are set
  to aprun -np X, because the H5lib_settings.c file was not generated
  properly. Not setting those environment variables works, because
  configure was able to automatically detect that it's a Cray system
  and used the proper launch commands when necessary.
  (MSC - 2012/04/18)

* The data conversion test dt_arith.c fails in "long double" to integer
  conversion on Ubuntu 11.10 (3.0.0.13 kernel) with GCC 4.6.1 if the library
  is built with optimization -O3 or -O2.  The older GCC (4.5) or newer kernel
  (3.2.2 on Fedora) doesn't have the problem.  Users should lower the
  optimization level (-O1 or -O0) by defining CFLAGS in the command line of
  "configure" like:

      CFLAGS=-O1 ./configure

  This will overwrite the library's default optimization level.
  (SLU - 2012/02/07 - HDFFV-7829)
  This issue is no longer present on Ubuntu 12.10 (3.5.0 kernel) with
  gcc 4.7.2.

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14 - HDFFV-8235)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* The C++ and FORTRAN bindings are not currently working on FreeBSD.
  (QAK - 2011/04/26)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. We are looking into the issue. HL and C++ shared libraries
  should now be working as intended, however.
  (MAM - 2011/04/20)

* The --with-mpe configure option does not work with Mpich2.
  (AKC - 2011/03/10)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* The library's test dt_arith.c showed a compiler's rounding problem on
  Cygwin when converting from unsigned long long to long double.  The
  library's own conversion works fine.  We defined a macro for Cygwin to
  skip this test until we can solve the problem.
  (SLU - 2010/05/05 - HDFFV-1264)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO.
  (CMC - 2009/04/28)

* On an Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)


%%%%1.8.10-patch1%%%%


HDF5 version 1.8.10-patch1 released on 2013-01-22
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.9 and
HDF5 1.8.10, and contains information on the platforms tested and
known problems in HDF5-1.8.10.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.10 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.10 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.10 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.10 (current
release) versus Release 1.8.9":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.10
- Bug Fixes since HDF5-1.8.9
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Configuration
    -------------
    - A new tool, cmakehdf5, which is a build command script similar to
      buildhdf5 is added and is available in the bin directory.
      (AKC - 2013/01/21)

    Library
    -------
    - Updated to latest autotools and changed all hard *.sh scripts to
      configure managed *.sh.in files. Removed overloading of autotools
      TESTS variable by examples and tests. Renamed configure.in to
      configure.ac. (ADB - 2012/08/23 - HDFFV-8129)
    - The data sieve buffer size was set for all the datasets in the file.  It
      could waste memory if any dataset size is smaller than the sieve buffer
      size.  Now the library picks the smaller one between the dataset size
      and the sieve buffer size from the file access property. See Issue 7934.
      (SLU - 2012/4/11)

    Parallel Library
    ----------------
    - Added the H5Pget_mpio_no_collective_cause() function that retrieves
      reasons why the collective I/O was broken during read/write IO access.
      (JKM - 2012/08/30 HDFFV-8143)

    - Added H5Pget_mpio_actual_io_mode_f (MSB - 2012/09/27)

    Tools
    -----
    - h5import: Changed to allow the use of h5dump output as input files to
      h5import. h5dump must include the "-p" option to print the properties;
      configuration file is captured output of h5dump. The restrictions are
      that only one dataset with a simple datatype (integer, floating-point,
      or string) can be processed. Integers and floating-point imports from
      h5dump must use the "binary" option for the data file. The string version
      uses the h5dump "-y --width=1" options to disable the indexing printouts,
      print single columns, and obviously NOT use the "binary" option.
      (ADB - 2012/07/19 HDFFV-721)

    High-Level APIs
    ---------------
    - None

    Fortran API
    -----------
    - Fixed a typo in return value of the nh5dread_f_c function (was 1
      instead of 0 on success); fixed the return value to make it consistent
      with other Fortran functions; cleaned debug statements from the code.
      (EIP - 2012/06/23)

    C++ API
    -------
    - None


Support for New Platforms, Languages, and Compilers
===================================================
    - None

Bug Fixes since HDF5-1.8.10
===========================
    Library
    -------
    - The library now behaves correctly when performing large I/O operations on
      Mac OS-X.  Previously, single I/O operations > 2 GB would fail since the
      Darwin read/write calls cannot handle the number of bytes that their
      parameter types imply.
      Fixes HDFFV-7975 and HDFFV-8240 (DER - 07 JAN 2013)
    - Fixed a bug in the core VFD that cause failures when opening files > 2 GB.
      Fixes HDFFV-8124 and HDFFV-8158 (DER - 07 JAN 2013)

    Tools
    -----
    - The following h5stat test case failed in BG/P machines (and potentially
      other machines that display extra output if an MPI task returns with a
      non-zero code.)
        Testing h5stat notexist.h5
      The test script was fixed to ignore the extra output.
      HDFFV-8233 (AKC - 2012/12/17)
    - h5diff: Fixed slowness when comparing HDF5 files with many attributes.
      Much slower performance was identified with later release version
      (from 1.8.7 to 1.8.10) compared to 1.8.6. The issue was introduced
      from fixing an attribute related bug for 1.8.7 release in the past.
      HDFFV-8145 (JKM 2012/12/13)

    Testing
    -------
    - None

Bug Fixes since HDF5-1.8.9
==========================

    Configuration
    -------------
    - Fixed configure --enable-production to not use -O optimization for Lion
      and Mountain Lion systems when gcc (i686-apple-darwin11-llvm-gcc-4.2
      (GCC) 4.2.1) is used.  Somehow the -O optimization will cause some of
      the hard conversion code in test/dt_arith.c to fail. HDFFV-8017.
      (AKC - 2012/10/10)
    - Fixed AIX Fortran compiler flags to use appropriate settings for
      debugging, profiling, and optimization situations. HDFFV-8069.
      (AKC 2012/09/27)

    Library
    -------
    - Fixed a memory leak exposed when inserting/removing a property
      from a property list several times. HDFFV-8022. (MSC 2012/05/18)
    - The file_image test will fail in the "initial file image and callbacks in
      the core VFD" sub-test if the source directory is read-only as the test
      fails to create its test files in the build directory. This has been
      fixed. HDFFV-8009 (AKC - 2012/07/06)


    Parallel Library
    ----------------
    - The MPI-POSIX VFD was updated to include the POSIX and Windows
      correctness features added that had already been added to the other VFDs.
      HDFFV-8058/7845.  (DER 2012/09/17)

    Performance
    -------------
    - Removed program perform/benchpar from the enable-build-all list.  The
      program will be retired or moved to another location.  HDFFV-8156
      (AKC 2012/10/01)
    - Retired program perform/mpi-perf. Its purpose has been incorporated
      into h5perf. (AKC 2012/09/21)

    Tools
    -----
    - h5repack: "h5repack -f NONE file1.h5 out.h5" command failed if
      source file contains chunked dataset and a chunk dim is bigger than
      the dataset dim. Another issue is that the command changed max dims
      if chunk dim is smaller than the dataset dim. These issue occurred
      when dataset size is smaller than 64k (compact size limit)  Fixed both.
      HDFFV-8012 (JKM 2012/09/24)
    - h5diff: Fixed the counter in verbose mode (-v, -r) so that it will no
      longer add together the differences between datasets and the differences
      between attributes of those datasets. This change makes the output of
      verbose mode consistent for datasets, groups, and committed datatypes.
      HDFFV-5919 (JKM 2012/09/10)
    - h5diff: Fixed the incorrect result when comparing attribute data
      values and the data type has the same class but different sizes.
      HDFFV-7942  (JKM 2012/08/15)
    - h5dump: Replaced single element fwrite with block writes.
      HDFFV-1208 (ADB 2012/08/13)
    - h5diff: Fixed test failure for "make check" due to failure of
      copying test files when performed in HDF5 source tree. Also applied
      to other tools.  HDFFV-8107 (JKM 2012/08/01)
    - ph5diff: Fixed intermittent hang issue on a certain operation in
      parallel mode. It was detected by daily test for comparing
      non-comparable objects, but it could have occurred in other
      operations depending on machine condition.  HDFFV-8003 (JKM 2012/08/01)
    - h5diff: Fixed the function COPY_TESTFILES_TO_TESTDIR() of testh5diff.sh
      to better report when there is an error in the file copying.
      HDFFV-8105 (AKC 2012/07/22)
    - h5dump: Fixed the sort by name display to maintain correct parent/child
      relationships between ascending/descending order.
      HDFFV-8095 (ADB 2012/07/12)
    - h5dump: Fixed the display by creation order when using option -n
      (print contents).
      HDFFV-5942 (ADB 2012/07/09)
    - h5dump: Changed to allow H5T_CSET_UTF8 to be displayed in h5dump output.
      Used technique similar to what was done in h5ls (matches library
      options).
      HDFFV-7999 (ADB 2012/05/23)
    - h5diff: Fixed the tool so that it will not check and display the status
      of dangling links without setting the --follow-symlinks option. This
      also improved performance when comparing lots of external links without
      the --follow-symlinks option.
      HDFFV-7998 (JKM 2012/04/26)

    F90 API
    -------

    - Fixed a typo in return value of the nh5dread_f_c function (was 1
      instead of 0 on success); fixed the return value to make it consistent
      with other Fortran functions; cleaned debug statements from the code.
      (EIP - 2012/06/23)

    - Fixed a problem writing/reading control characters to a dataset; writing
      a string containing alerts, backspace, carriage_return, form_feed,
      horizontal_tab, vertical_tab, or new_line is now tested and working.
      (MSB - 2012/09/01)

    - Corrected the integer type of H5S_UNLIMITED_F to HSIZE_T (MSB - 2012/09/01)

    - Corrected the number of continuation lines in the src files
      to be less than 32 lines for F95 compliance. (MSB - 2012/10/01)

    C++ API
    ------
    - None

    High-Level APIs:
    ------

    - Fixed problem with H5TBdelete_record destroying all data following the
      deletion of a row. (MSB- 2012/7/26)

    - Fixed H5LTget_attribute_string not closing an object identifier when an
      error occurs. (MSB- 2012/7/21)

    - Corrected the return type of H5TBAget_fill from herr_t to htri_t to
      reflect that a return value of 1 indicates that a fill value is
      present, 0 indicates a fill value is not present, and <0 indicates an
      error.

    Fortran High-Level APIs:
    ------
    - None

Supported Platforms
===================
    AIX 5.3                       xlc 10.1.0.5
    (NASA G-ADA)                  xlC 10.1.0.5
                                  xlf90 12.1.0.6

    Linux 2.6.18-308.13.1.el5PAE  GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP i686 i686 i386         compilers for 32-bit applications;
    (jam)                             Version 4.1.2 20080704 (Red Hat 4.1.2-52)
                                      Version 4.6.3
                                  PGI C, Fortran, C++ Compilers for 32-bit
                                  applications;
                                      Version 11.9-0
                                  Intel(R) C, C++, Fortran Compiler for 32-bit
                                  applications;
                                      Version 12.1
                                  MPICH mpich2-1.4.1p1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    Linux 2.6.18-308.16.1.el5     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers for 32-bit applications;
    (koala)                           Version 4.1.2 20080704 (Red Hat 4.1.2-52)
                                      Version 4.6.3
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 11.9-0
                                      Version 12.5-0
                                  Intel(R) C, C++, Fortran Compilers for
                                  applications running on Intel(R) 64;
                                      Version 12.1 (Build 20110811)
                                      Version 12.1 (Build 20120212)
                                  MPICH mpich2-1.4.1p1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    Linux 2.6.32-220.7.1.el6.ppc64 gcc (GCC) 4.4.6 20110731 (Red Hat 4.4.6-3)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.6 20110731
    (ostrich)                     GNU Fortran (GCC) 4.4.6 20110731 (Red Hat 4.4.6-3)

    Linux 2.6.32-220.23.1.1chaos  Intel C, C++, Fortran Compilers
    ch5.x86_64 GNU/Linux              Version 12.1.5.339
    (LLNL Aztec)

    IBM Blue Gene/P               XL C for Blue Gene/P, bgxlc V9.0
    (LLNL uDawn)                  XL C++ for Blue Gene/P, bgxlC V9.0
                                  XL Fortran for Blue Gene/P, bgxlf90 V11.1

    SunOS 5.10 32- and 64-bit     Sun C 5.9 Sun OS_sparc Patch 124867-16
    (linew)                       Sun Fortran 95 8.3 Sun OS_sparc Patch 127000-13
                                  Sun C++ 5.9 Sun OS_sparc Patch 124863-26
                                  Sun C 5.11 SunOS_sparc
                                  Sun Fortran 95 8.5 SunOS_sparc
                                  Sun C++ 5.11 SunOS_sparc

    Windows XP                    Visual Studio 2008 w/ Intel Fortran 10.1 (project files)

    Windows XP x64                Visual Studio 2008 w/ Intel Fortran 10.1 (project files)

    Windows 7                     Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 1.7.15(0.260/5/3) gcc(4.5.3) compiler and gfortran)
                                  (cmake and autotools)

    Windows 7 x64                 Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 1.7.15(0.260/5/3) gcc(4.5.3) compiler and gfortran)
                                  (cmake and autotools)

    Mac OS X Snow Leopard 10.6.8  gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    Darwin Kernel Version 10.8.0  g++ i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    (fred)                        gfortran GNU Fortran (GCC) 4.6.2
                                  Intel C (icc), Fortran (ifort), C++ (icpc)
                                      12.1.0.038 Build 20110811

    Mac OS X Snow Leopard 10.6.8  gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    Darwin Kernel Version 10.8.0  g++ i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    Intel 32-bit                  gfortran GNU Fortran (GCC) 4.6.1
    (tejeda)                      Intel C (icc), Fortran (ifort), C++ (icpc)
                                      12.1.0.038 Build 20110811

    Mac OS X Lion 10.7.3          gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 from Xcode 4.2.1
    32- and 64-bit                g++ i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 from Xcode 4.2.1
    (duck)                        gfortran GNU Fortran (GCC) 4.6.2

    Mac OS X Mountain Lion 10.8.1 cc Apple clang version 4.0 from Xcode 4.5.1
    (owl)                         c++ Apple clang version 4.0 from Xcode 4.5.1
                gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 from Xcode 4.5.1
                g++ i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 from Xcode 4.5.1
                        gfortran GNU Fortran (GCC) 4.6.2


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
Solaris2.10 32-bit                      n        y/y    n        y    y     y
Solaris2.10 64-bit                      n        y/n    n        y    y     y
Windows 7                               y        y/n    n        y    y     y
Windows 7     x64                       y        y/n    n        y    y     y
Mac OS X Snow Leopard 10.6.8 32-bit     n        y/y    n        y    y     n
Mac OS X Snow Leopard 10.6.8 64-bit     n        y/y    n        y    y     y
Mac OS X Lion 10.7.3 32-bit             n        y/y    n        y    y     n
Mac OS X Lion 10.7.3 64-bit             n        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.1 64-bit    n        y/n    n        y    y     n
AIX 5.3 32- and 64-bit                  y        y/n    y        y    y     y
CentOS 5.5 Linux 2.6.18-308 i686 GNU    y        y/y    y        y    y     y
CentOS 5.5 Linux 2.6.18-308 i686 Intel  n        y/y    n        y    y     y
CentOS 5.5 Linux 2.6.18-308 i686 PGI    n        y/y    n        y    y     y
CentOS 5.5 Linux 2.6.18 x86_64 GNU      y        y/y    y        y    y     y
CentOS 5.5 Linux 2.6.18 x86_64 Intel    n        y/y    n        y    y     y
CentOS 5.5 Linux 2.6.18 x86_64 PGI      n        y/y    n        y    y     y
Linux 2.6.32-220.7.1.el6.ppc64          n        y/n    n        y    y     y


Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
Solaris2.10 32-bit                         y       y         y         y
Solaris2.10 64-bit                         n       n         n         n
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Mac OS X Snow Leopard 10.6.8 32-bit        y       n         y         n
Mac OS X Snow Leopard 10.6.8 64-bit        y       n         y         n
Mac OS X Lion 10.7.3 32-bit                y       n         y         y
Mac OS X Lion 10.7.3 64-bit                y       n         y         y
Mac OS X Mountain Lion 10.8.1 64-bit       y       n         y         y
AIX 5.3 32- and 64-bit                     n       n         n         y
CentOS 5.5 Linux 2.6.18-308 i686 GNU       y       y         y         y
CentOS 5.5 Linux 2.6.18-308 i686 Intel     y       y         y         n
CentOS 5.5 Linux 2.6.18-308 i686 PGI       y       y         y         n
CentOS 5.5 Linux 2.6.18 x86_64 GNU         y       y         y         y
CentOS 5.5 Linux 2.6.18 x86_64 Intel       y       y         y         n
CentOS 5.5 Linux 2.6.18 x86_64 PGI         y       y         y         n
Linux 2.6.32-220.7.1.el6.ppc64             y       y         y         n

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    FreeBSD 8.2-STABLE i386       gcc 4.2.1 [FreeBSD] 20070719
    (loyalty)                     gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    FreeBSD 8.2-STABLE amd64      gcc 4.2.1 [FreeBSD] 20070719
    (freedom)                     gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    Debian6.0.3 2.6.32-5-686 #1 SMP i686 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5
                                  (cmake and autotools)

    Debian6.0.3 2.6.32-5-amd64 #1 SMP x86_64 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5
                                  (cmake and autotools)

    Fedora17 3.5.2-1.fc17.i6866 #1 SMP i686 i686 i386 GNU/Linux
                                  gcc (GCC) 4.7.0 20120507 (Red Hat 4.7.0-5)
                                  GNU Fortran (GCC) 4.7.0 20120507 (Red Hat 4.7.0-5)
                                  (cmake and autotools)

    Fedora17 3.5.2-1.fc17.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.7.0 20120507 (Red Hat 4.7.0-5)
                                  GNU Fortran (GCC) 4.7.0 20120507 (Red Hat 4.7.0-5)
                                  (cmake and autotools)

    SUSE 12.2 3.4.6-2.10-desktop #1 SMP PREEMPT i686 i686 i386 GNU/Linux
                                  gcc (SUSE Linux) 4.7.1
                                  GNU Fortran (SUSE Linux) 4.7.1
                                  (cmake and autotools)

    SUSE 12.2 3.4.6-2.10-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.7.1
                                  GNU Fortran (SUSE Linux) 4.7.1
                                  (cmake and autotools)

    Ubuntu 12.04 3.2.0-29-generic #46-Ubuntu SMP i686 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
                                  GNU Fortran (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
                                  (cmake and autotools)

    Ubuntu 12.04 3.2.0-29-generic #46-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
                                  GNU Fortran (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
                                  (cmake and autotools)
                                  (Use optimization level -O1)

    Cray Linux Environment (CLE)  PrgEnv-pgi/4.0.46
    hopper.nersc.gov              pgcc 12.5-0 64-bit target on x86-64 Linux -tp shanghai
                                  pgf90 12.5-0 64-bit target on x86-64 Linux -tp shanghai
                                  pgCC 12.5-0 64-bit target on x86-64 Linux -tp shanghai


Known Problems
==============
* The C++ and FORTRAN bindings are not currently working on FreeBSD with the
  native release 8.2 compilers (4.2.1), but are working with gcc 4.6 from the
  ports (and probably gcc releases after that).
  (QAK - 2012/10/19)

* The following h5dump test case fails in BG/P machines (and potentially other
  machines that use a command script to launch executables):

   h5dump --no-compact-subset -d "AHFINDERDIRECT::ah_centroid_t[0] it=0 tl=0"
     tno-subset.h5

  This is due to the embedded spaces in the dataset name being interpreted
  by the command script launcher as meta-characters, thus passing three
  arguments to h5dump's -d flag. The command passes if run by hand, just
  not via the test script.
  (AKC - 2012/05/03)

* On hopper, the build failed when RUNSERIAL and RUNPARALLEL are set
  to aprun -np X, because the H5lib_settings.c file was not generated
  properly. Not setting those environment variables works, because
  configure was able to automatically detect that it's a Cray system
  and used the proper launch commands when necessary.
  (MSC - 2012/04/18)

* The data conversion test dt_arith.c fails in "long double" to integer
  conversion on Ubuntu 11.10 (3.0.0.13 kernel) with GCC 4.6.1 if the library
  is built with optimization -O3 or -O2.  The older GCC (4.5) or newer kernel
  (3.2.2 on Fedora) doesn't have the problem.  Users should lower the
  optimization level (-O1 or -O0) by defining CFLAGS in the command line of
  "configure" like:

      CFLAGS=-O1 ./configure

  This will overwrite the library's default optimization level.
  (SLU - 2012/02/07 - HDFFV-7829)

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14 - HDFFV-8235)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* The C++ and FORTRAN bindings are not currently working on FreeBSD.
  (QAK - 2011/04/26)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. We are looking into the issue. HL and C++ shared libraries
  should now be working as intended, however.
  (MAM - 2011/04/20)

* The --with-mpe configure option does not work with Mpich2.
  (AKC - 2011/03/10)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* The library's test dt_arith.c showed a compiler's rounding problem on
  Cygwin when converting from unsigned long long to long double.  The
  library's own conversion works fine.  We defined a macro for Cygwin to
  skip this test until we can solve the problem.
  (SLU - 2010/05/05 - HDFFV-1264)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO.
  (CMC - 2009/04/28)

* On an Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)


%%%%1.8.10%%%%


HDF5 version 1.8.10 released on 2012-10-26
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.9 and
HDF5 1.8.10, and contains information on the platforms tested and
known problems in HDF5-1.8.10.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.10 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.10 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.10 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.10 (current
release) versus Release 1.8.9":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.9
- Supported Platforms
- Supported Configuration Features Summary
- More Tested Platforms
- Known Problems


New Features
============

    Configuration
    -------------
    - None

    Library
    -------
    - Updated to latest autotools and changed all hard *.sh scripts to
      configure managed *.sh.in files. Removed overloading of autotools
      TESTS variable by examples and tests. Renamed configure.in to
      configure.ac. (ADB - 2012/08/23 - HDFFV-8129)
    - The data sieve buffer size was set for all the datasets in the file.  It
      could waste memory if any dataset size is smaller than the sieve buffer
      size.  Now the library picks the smaller one between the dataset size
      and the sieve buffer size from the file access property. See Issue 7934.
      (SLU - 2012/4/11)

    Parallel Library
    ----------------
    - Added the H5Pget_mpio_no_collective_cause() function that retrieves
      reasons why the collective I/O was broken during read/write IO access.
      (JKM - 2012/08/30 HDFFV-8143)

    - Added H5Pget_mpio_actual_io_mode_f (MSB - 2012/09/27)

    Tools
    -----
    - h5import: Changed to allow the use of h5dump output as input files to
      h5import. h5dump must include the "-p" option to print the properties;
      configuration file is captured output of h5dump. The restrictions are
      that only one dataset with a simple datatype (integer, floating-point,
      or string) can be processed. Integers and floating-point imports from
      h5dump must use the "binary" option for the data file. The string version
      uses the h5dump "-y --width=1" options to disable the indexing printouts,
      print single columns, and obviously NOT use the "binary" option.
      (ADB - 2012/07/19 HDFFV-721)

    High-Level APIs
    ---------------
    - None

    Fortran API
    -----------
    - Fixed a typo in return value of the nh5dread_f_c function (was 1
      instead of 0 on success); fixed the return value to make it consistent
      with other Fortran functions; cleaned debug statements from the code.
      (EIP - 2012/06/23)

    C++ API
    -------
    - None


Support for New Platforms, Languages, and Compilers
===================================================
    - None

Bug Fixes since HDF5-1.8.9
==========================

    Configuration
    -------------
    - Fixed configure --enable-production to not use -O optimization for Lion
      and Mountain Lion systems when gcc (i686-apple-darwin11-llvm-gcc-4.2
      (GCC) 4.2.1) is used.  Somehow the -O optimization will cause some of
      the hard conversion code in test/dt_arith.c to fail. HDFFV-8017.
      (AKC - 2012/10/10)
    - Fixed AIX Fortran compiler flags to use appropriate settings for
      debugging, profiling, and optimization situations. HDFFV-8069.
      (AKC 2012/09/27)

    Library
    -------
    - Fixed a memory leak exposed when inserting/removing a property
      from a property list several times. HDFFV-8022. (MSC 2012/05/18)
    - The file_image test will fail in the "initial file image and callbacks in
      the core VFD" sub-test if the source directory is read-only as the test
      fails to create its test files in the build directory. This has been
      fixed. HDFFV-8009 (AKC - 2012/07/06)


    Parallel Library
    ----------------
    - The MPI-POSIX VFD was updated to include the POSIX and Windows
      correctness features added that had already been added to the other VFDs.
      HDFFV-8058/7845.  (DER 2012/09/17)

    Performance
    -------------
    - Removed program perform/benchpar from the enable-build-all list.  The
      program will be retired or moved to another location.  HDFFV-8156
      (AKC 2012/10/01)
    - Retired program perform/mpi-perf. Its purpose has been incorporated
      into h5perf. (AKC 2012/09/21)

    Tools
    -----
    - h5repack: "h5repack -f NONE file1.h5 out.h5" command failed if
      source file contains chunked dataset and a chunk dim is bigger than
      the dataset dim. Another issue is that the command changed max dims
      if chunk dim is smaller than the dataset dim. These issue occurred
      when dataset size is smaller than 64k (compact size limit)  Fixed both.
      HDFFV-8012 (JKM 2012/09/24)
    - h5diff: Fixed the counter in verbose mode (-v, -r) so that it will no
      longer add together the differences between datasets and the differences
      between attributes of those datasets. This change makes the output of
      verbose mode consistent for datasets, groups, and committed datatypes.
      HDFFV-5919 (JKM 2012/09/10)
    - h5diff: Fixed the incorrect result when comparing attribute data
      values and the data type has the same class but different sizes.
      HDFFV-7942  (JKM 2012/08/15)
    - h5dump: Replaced single element fwrite with block writes.
      HDFFV-1208 (ADB 2012/08/13)
    - h5diff: Fixed test failure for "make check" due to failure of
      copying test files when performed in HDF5 source tree. Also applied
      to other tools.  HDFFV-8107 (JKM 2012/08/01)
    - ph5diff: Fixed intermittent hang issue on a certain operation in
      parallel mode. It was detected by daily test for comparing
      non-comparable objects, but it could have occurred in other
      operations depending on machine condition.  HDFFV-8003 (JKM 2012/08/01)
    - h5diff: Fixed the function COPY_TESTFILES_TO_TESTDIR() of testh5diff.sh
      to better report when there is an error in the file copying.
      HDFFV-8105 (AKC 2012/07/22)
    - h5dump: Fixed the sort by name display to maintain correct parent/child
      relationships between ascending/descending order.
      HDFFV-8095 (ADB 2012/07/12)
    - h5dump: Fixed the display by creation order when using option -n
      (print contents).
      HDFFV-5942 (ADB 2012/07/09)
    - h5dump: Changed to allow H5T_CSET_UTF8 to be displayed in h5dump output.
      Used technique similar to what was done in h5ls (matches library
      options).
      HDFFV-7999 (ADB 2012/05/23)
    - h5diff: Fixed the tool so that it will not check and display the status
      of dangling links without setting the --follow-symlinks option. This
      also improved performance when comparing lots of external links without
      the --follow-symlinks option.
      HDFFV-7998 (JKM 2012/04/26)

    F90 API
    -------

    - Fixed a typo in return value of the nh5dread_f_c function (was 1
      instead of 0 on success); fixed the return value to make it consistent
      with other Fortran functions; cleaned debug statements from the code.
      (EIP - 2012/06/23)

    - Fixed a problem writing/reading control characters to a dataset; writing
      a string containing alerts, backspace, carriage_return, form_feed,
      horizontal_tab, vertical_tab, or new_line is now tested and working.
      (MSB - 2012/09/01)

    - Corrected the integer type of H5S_UNLIMITED_F to HSIZE_T (MSB - 2012/09/01)

    - Corrected the number of continuation lines in the src files
      to be less than 32 lines for F95 compliance. (MSB - 2012/10/01)

    C++ API
    ------
    - None

    High-Level APIs:
    ------

    - Fixed problem with H5TBdelete_record destroying all data following the
      deletion of a row. (MSB- 2012/7/26)

    - Fixed H5LTget_attribute_string not closing an object identifier when an
      error occurs. (MSB- 2012/7/21)

    - Corrected the return type of H5TBAget_fill from herr_t to htri_t to
      reflect that a return value of 1 indicates that a fill value is
      present, 0 indicates a fill value is not present, and <0 indicates an
      error.

    Fortran High-Level APIs:
    ------
    - None

Supported Platforms
===================
    AIX 5.3                       xlc 10.1.0.5
    (NASA G-ADA)                  xlC 10.1.0.5
                                  xlf90 12.1.0.6

    Linux 2.6.18-308.13.1.el5PAE  GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP i686 i686 i386         compilers for 32-bit applications;
    (jam)                             Version 4.1.2 20080704 (Red Hat 4.1.2-52)
                                      Version 4.6.3
                                  PGI C, Fortran, C++ Compilers for 32-bit
                                  applications;
                                      Version 11.9-0
                                  Intel(R) C, C++, Fortran Compiler for 32-bit
                                  applications;
                                      Version 12.1
                                  MPICH mpich2-1.4.1p1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    Linux 2.6.18-308.16.1.el5     GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers for 32-bit applications;
    (koala)                           Version 4.1.2 20080704 (Red Hat 4.1.2-52)
                                      Version 4.6.3
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 11.9-0
                                      Version 12.5-0
                                  Intel(R) C, C++, Fortran Compilers for
                                  applications running on Intel(R) 64;
                                      Version 12.1 (Build 20110811)
                                      Version 12.1 (Build 20120212)
                                  MPICH mpich2-1.4.1p1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    Linux 2.6.32-220.7.1.el6.ppc64 gcc (GCC) 4.4.6 20110731 (Red Hat 4.4.6-3)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.6 20110731
    (ostrich)                     GNU Fortran (GCC) 4.4.6 20110731 (Red Hat 4.4.6-3)

    Linux 2.6.32-220.23.1.1chaos  Intel C, C++, Fortran Compilers
    ch5.x86_64 GNU/Linux              Version 12.1.5.339
    (LLNL Aztec)

    IBM Blue Gene/P               XL C for Blue Gene/P, bgxlc V9.0
    (LLNL uDawn)                  XL C++ for Blue Gene/P, bgxlC V9.0
                                  XL Fortran for Blue Gene/P, bgxlf90 V11.1

    SunOS 5.10 32- and 64-bit     Sun C 5.9 Sun OS_sparc Patch 124867-16
    (linew)                       Sun Fortran 95 8.3 Sun OS_sparc Patch 127000-13
                                  Sun C++ 5.9 Sun OS_sparc Patch 124863-26
                                  Sun C 5.11 SunOS_sparc
                                  Sun Fortran 95 8.5 SunOS_sparc
                                  Sun C++ 5.11 SunOS_sparc

    Windows XP                    Visual Studio 2008 w/ Intel Fortran 10.1 (project files)

    Windows XP x64                Visual Studio 2008 w/ Intel Fortran 10.1 (project files)

    Windows 7                     Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 1.7.15(0.260/5/3) gcc(4.5.3) compiler and gfortran)
                                  (cmake and autotools)

    Windows 7 x64                 Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)
                                  Cygwin(CYGWIN_NT-6.1 1.7.15(0.260/5/3) gcc(4.5.3) compiler and gfortran)
                                  (cmake and autotools)

    Mac OS X Snow Leopard 10.6.8  gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    Darwin Kernel Version 10.8.0  g++ i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    (fred)                        gfortran GNU Fortran (GCC) 4.6.2
                                  Intel C (icc), Fortran (ifort), C++ (icpc)
                                      12.1.0.038 Build 20110811

    Mac OS X Snow Leopard 10.6.8  gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    Darwin Kernel Version 10.8.0  g++ i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 from Xcode 3.2.6
    Intel 32-bit                  gfortran GNU Fortran (GCC) 4.6.1
    (tejeda)                      Intel C (icc), Fortran (ifort), C++ (icpc)
                                      12.1.0.038 Build 20110811

    Mac OS X Lion 10.7.3          gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 from Xcode 4.2.1
    32- and 64-bit                g++ i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 from Xcode 4.2.1
    (duck)                        gfortran GNU Fortran (GCC) 4.6.2

    Mac OS X Mountain Lion 10.8.1 cc Apple clang version 4.0 from Xcode 4.5.1
    (owl)                         c++ Apple clang version 4.0 from Xcode 4.5.1
                gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 from Xcode 4.5.1
                g++ i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 from Xcode 4.5.1
                        gfortran GNU Fortran (GCC) 4.6.2


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                              C         F90/   F90      C++  zlib  SZIP
                                      parallel  F2003  parallel
Solaris2.10 32-bit                      n        y/y    n        y    y     y
Solaris2.10 64-bit                      n        y/n    n        y    y     y
Windows 7                               y        y/n    n        y    y     y
Windows 7     x64                       y        y/n    n        y    y     y
Mac OS X Snow Leopard 10.6.8 32-bit     n        y/y    n        y    y     n
Mac OS X Snow Leopard 10.6.8 64-bit     n        y/y    n        y    y     y
Mac OS X Lion 10.7.3 32-bit             n        y/y    n        y    y     n
Mac OS X Lion 10.7.3 64-bit             n        y/y    n        y    y     y
Mac OS X Mountain Lion 10.8.1 64-bit    n        y/n    n        y    y     n
AIX 5.3 32- and 64-bit                  y        y/n    y        y    y     y
CentOS 5.5 Linux 2.6.18-308 i686 GNU    y        y/y    y        y    y     y
CentOS 5.5 Linux 2.6.18-308 i686 Intel  n        y/y    n        y    y     y
CentOS 5.5 Linux 2.6.18-308 i686 PGI    n        y/y    n        y    y     y
CentOS 5.5 Linux 2.6.18 x86_64 GNU      y        y/y    y        y    y     y
CentOS 5.5 Linux 2.6.18 x86_64 Intel    n        y/y    n        y    y     y
CentOS 5.5 Linux 2.6.18 x86_64 PGI      n        y/y    n        y    y     y
Linux 2.6.32-220.7.1.el6.ppc64          n        y/n    n        y    y     y


Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
Solaris2.10 32-bit                         y       y         y         y
Solaris2.10 64-bit                         n       n         n         n
Windows 7                                  y       y         y         y
Windows 7 x64                              y       y         y         y
Mac OS X Snow Leopard 10.6.8 32-bit        y       n         y         n
Mac OS X Snow Leopard 10.6.8 64-bit        y       n         y         n
Mac OS X Lion 10.7.3 32-bit                y       n         y         y
Mac OS X Lion 10.7.3 64-bit                y       n         y         y
Mac OS X Mountain Lion 10.8.1 64-bit       y       n         y         y
AIX 5.3 32- and 64-bit                     n       n         n         y
CentOS 5.5 Linux 2.6.18-308 i686 GNU       y       y         y         y
CentOS 5.5 Linux 2.6.18-308 i686 Intel     y       y         y         n
CentOS 5.5 Linux 2.6.18-308 i686 PGI       y       y         y         n
CentOS 5.5 Linux 2.6.18 x86_64 GNU         y       y         y         y
CentOS 5.5 Linux 2.6.18 x86_64 Intel       y       y         y         n
CentOS 5.5 Linux 2.6.18 x86_64 PGI         y       y         y         n
Linux 2.6.32-220.7.1.el6.ppc64             y       y         y         n

Compiler versions for each platform are listed in the preceding
"Supported Platforms" table.


More Tested Platforms
=====================
The following platforms are not supported but have been tested for this release.

    FreeBSD 8.2-STABLE i386       gcc 4.2.1 [FreeBSD] 20070719
    (loyalty)                     gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    FreeBSD 8.2-STABLE amd64      gcc 4.2.1 [FreeBSD] 20070719
    (freedom)                     gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    Debian6.0.3 2.6.32-5-686 #1 SMP i686 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5
                                  (cmake and autotools)

    Debian6.0.3 2.6.32-5-amd64 #1 SMP x86_64 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5
                                  (cmake and autotools)

    Fedora17 3.5.2-1.fc17.i6866 #1 SMP i686 i686 i386 GNU/Linux
                                  gcc (GCC) 4.7.0 20120507 (Red Hat 4.7.0-5)
                                  GNU Fortran (GCC) 4.7.0 20120507 (Red Hat 4.7.0-5)
                                  (cmake and autotools)

    Fedora17 3.5.2-1.fc17.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.7.0 20120507 (Red Hat 4.7.0-5)
                                  GNU Fortran (GCC) 4.7.0 20120507 (Red Hat 4.7.0-5)
                                  (cmake and autotools)

    SUSE 12.2 3.4.6-2.10-desktop #1 SMP PREEMPT i686 i686 i386 GNU/Linux
                                  gcc (SUSE Linux) 4.7.1
                                  GNU Fortran (SUSE Linux) 4.7.1
                                  (cmake and autotools)

    SUSE 12.2 3.4.6-2.10-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.7.1
                                  GNU Fortran (SUSE Linux) 4.7.1
                                  (cmake and autotools)

    Ubuntu 12.04 3.2.0-29-generic #46-Ubuntu SMP i686 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
                                  GNU Fortran (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
                                  (cmake and autotools)

    Ubuntu 12.04 3.2.0-29-generic #46-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
                                  GNU Fortran (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
                                  (cmake and autotools)
                                  (Use optimization level -O1)

    Cray Linux Environment (CLE)  PrgEnv-pgi/4.0.46
    hopper.nersc.gov              pgcc 12.5-0 64-bit target on x86-64 Linux -tp shanghai
                                  pgf90 12.5-0 64-bit target on x86-64 Linux -tp shanghai
                                  pgCC 12.5-0 64-bit target on x86-64 Linux -tp shanghai


Known Problems
==============
* The following h5stat test case fails in BG/P machines (and potentially other
  machines that display extra output if an MPI task returns with a non-zero
  code.)
    Testing h5stat notexist.h5

  The test actually runs and passes as expected. It is the extra output from
  the MPI process that causes the test script to fail. This will be fixed
  in the next release.  (AKC - 2012/10/25 - HDFFV-8233)

* The C++ and FORTRAN bindings are not currently working on FreeBSD with the
  native release 8.2 compilers (4.2.1), but are working with gcc 4.6 from the
  ports (and probably gcc releases after that).
  (QAK - 2012/10/19)

* The following h5dump test case fails in BG/P machines (and potentially other
  machines that use a command script to launch executables):

   h5dump --no-compact-subset -d "AHFINDERDIRECT::ah_centroid_t[0] it=0 tl=0"
     tno-subset.h5

  This is due to the embedded spaces in the dataset name being interpreted
  by the command script launcher as meta-characters, thus passing three
  arguments to h5dump's -d flag. The command passes if run by hand, just
  not via the test script.
  (AKC - 2012/05/03)

* On hopper, the build failed when RUNSERIAL and RUNPARALLEL are set
  to aprun -np X, because the H5lib_settings.c file was not generated
  properly. Not setting those environment variables works, because
  configure was able to automatically detect that it's a Cray system
  and used the proper launch commands when necessary.
  (MSC - 2012/04/18)

* The data conversion test dt_arith.c fails in "long double" to integer
  conversion on Ubuntu 11.10 (3.0.0.13 kernel) with GCC 4.6.1 if the library
  is built with optimization -O3 or -O2.  The older GCC (4.5) or newer kernel
  (3.2.2 on Fedora) doesn't have the problem.  Users should lower the
  optimization level (-O1 or -O0) by defining CFLAGS in the command line of
  "configure" like:

      CFLAGS=-O1 ./configure

  This will overwrite the library's default optimization level.
  (SLU - 2012/02/07 - HDFFV-7829)

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14 - HDFFV-8235)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* The C++ and FORTRAN bindings are not currently working on FreeBSD.
  (QAK - 2011/04/26)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. We are looking into the issue. HL and C++ shared libraries
  should now be working as intended, however.
  (MAM - 2011/04/20)

* The --with-mpe configure option does not work with Mpich2.
  (AKC - 2011/03/10)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* The library's test dt_arith.c showed a compiler's rounding problem on
  Cygwin when converting from unsigned long long to long double.  The
  library's own conversion works fine.  We defined a macro for Cygwin to
  skip this test until we can solve the problem.
  (SLU - 2010/05/05 - HDFFV-1264)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO.
  (CMC - 2009/04/28)

* On an Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)


%%%%1.8.9%%%%


HDF5 version 1.8.9 released on 2012-05-09
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.8 and
HDF5 1.8.9. It also contains information on the platforms tested and
known problems in HDF5-1.8.9.

For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.9 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.9 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.9 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.9 (current
release) versus Release 1.8.8":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.8
- Platforms Tested
- Supported Configuration Features Summary
- Known Problems


New Features
============

    Configuration
    -------------
    - None

    Library
    -------
    - Added new feature to merge committed datatypes when copying objects,
      using new H5O_COPY_MERGE_COMMITTED_DTYPE_FLAG, modified by new API
      routines: H5Padd_merge_committed_dtype_path(),
      H5Pfree_merge_committed_dtype_paths(), H5Pset_mcdt_search_cb() and
      H5Pget_mcdt_search_cb().  (QAK - 2012/03/30)
    - Added new feature which allows working with files in memory in the
      same ways files are worked with on disk. New API routines include
      H5Pset_file_image, H5Pget_file_image, H5Pset_file_image_callbacks,
      H5Pget_file_image_callbacks, H5Fget_file_image, and
      H5LTopen_file_image. (QAK - 2012/04/17)

    Parallel Library
    ----------------
    - Corrected memory allocation error in MPI datatype construction code.
      (QAK - 2012/04/23)
    - Add two new routines to set/get the atomicity parameter in the
      MPI library to perform atomic operations. Some file systems (for
      example PVFS2) do not support atomic updates, so those routines
      would not be supported. (MSC - 2012/03/27 - HDFFV-7961)

    Tools
    -----
    - h5repack: Added ability to set the metadata block size of the output
      file, with the '-M'/'--metadata_block_size' command line parameter.
      (QAK - 2012/03/30)
    - h5stat: Added ability to display a summary of the file space usage for a
      file, with the '-S'/'--summary' command line parameter.  (QAK - 2012/03/28)
    - h5dump: Added capability for "-a" option to show attributes containing "/"
      by using an escape character. For example, for a dataset "/dset"
      containing attribute "speed(m/h)", use "h5dump -a "/dset/speed(\/h)"
      to show the content of the attribute. (PC - 2012/03/12 - HDFFV-7523)
    - h5dump: Added ability to apply command options across multiple files using a
      wildcard in the filename. Unix example; "h5dump -H -d Dataset1 tarr*.h5".
      Cross platform example; "h5dump -H -d Dataset1 tarray1.h5 tarray2.h5 tarray3.h5".
      (ADB - 2012/03/12 - HDFFV-7876).
    - h5dump: Added new option --no-compact-subset. This option will not
      interpret the '[' character as starting the compact form of
      subsetting. This is useful when the "h5dump error: unable to
      open dataset "datset_name"" message is output because a dataset
      name contains a '[' character. (ADB - 2012/03/05 - HDFFV-7689).
    - h5repack: Improved performance for big chunked datasets (size > 128MB)
      when used with the layout (-l) or compression (-f) options.
      Before this change, repacking datasets with chunks with a large first
      dimension would take extremely long. For example, repacking a dataset
      with chunk dimensions of 1024x5x1 might take many hours to process
      while changing a dataset with chunk dimensions set to 1x5x1024
      might take under an hour. After this change, processing the dataset
      with chunk dimensions of 1024x5x1 takes about 15 minutes, and processing
      a dataset with chunk dimensions of 1x5x1024 takes about 14 minutes.
      (JKM - 2012/03/01 - HDFFV-7862)

    High-Level APIs
    ---------------
    - New API: H5LTpath_valid (Fortran: h5ltpath_valid_f) checks
      if a path is correct, determines if a link resolves to a valid
      object, and checks that the link does not dangle. (MSB - 2012/03/15)

    Fortran API
    -----------

    - Added for the C API the Fortran wrapper:
       h5ocopy_f (MSB - 2012/03/22)

    C++ API
    -------
    - None


Support for New Platforms, Languages, and Compilers
===================================================
    - None

Bug Fixes since HDF5-1.8.8
==========================

    Configuration
    -------------
    - Fixed Makefile issue in which "-Wl," was not properly specified
      prior to -rpath when building parallel Fortran libraries with
      an Intel compiler. (MAM - 2012/03/26)
    - Makefiles generated by other packages using h5cc as the compiler
      no longer error when 'make' is invoked more than once in order
      to 'rebuild' after changes to source. (MAM - 2012/03/26)
    - Added code to display the version information of XL Fortran and C++
      in the summary of configure. (AKC - 2012/02/28 - HDFFV-7793)
    - Updated all CMakeLists.txt files to indicate the minimum CMake version is
      the current standard of 2.8.6 (ADB - 2011/12/05 - HDFFV-7854)

    Library
    -------
    - Windows and STDIO correctness changes have been propagated from the SEC2
      and old Windows drivers to the STDIO VFD.  (DER - 2012/03/30 - HDFFV-7917)
    - Fixed an error that would occur when copying an object with attribute
      creation order tracked and indexed. (NAF - 2012/03/28 - HDFFV-7762)
    - Fixed a bug in H5Ocopy(): When copying an opened object, call the
      object's flush class action to ensure that cached data is flushed so
      that H5Ocopy will get the correct data.  (VC - 2012/03/27 - HDFFV-7853)
    - The istore test will now skip the sparse 50x50x50 test when the VFD does
      not support sparse files on that platform.  The most important platforms
      on which this will be skipped are Windows (NTFS sparse files are not
      supported) and Mac OS-X (HFS sparse files are not supported).  This
      fixes CTest timeout issues on Windows.  (DER - 2012/03/27 - HDFFV-7769)
    - Windows and POSIX correctness changes have been propagated from the SEC2
      VFD to the Core VFD.  This mainly affects file operations on the
      driver's backing store and fixes a problem on Windows where large files
      could not be read. (DER - 2012/03/27 - HDFFV-7916 - HDFFV-7603)
    - When an application tries to write or read many small data chunks and
      runs out of memory, the library had a segmentation fault.  The fix is to
      return the error stack with proper information.
      (SLU - 2012/03/23 - HDFFV-7785)
    - H5Pset_data_transform had a segmentation fault in some cases like x*-100.
      It works correctly now and handles other cases like 100-x or 2/x.
      (SLU - 2012/03/15 - HDFFV-7922)
    - Fixed rare corruption bugs that could occur when using the new object
      header format. (NAF - 2012/03/15 - HDFFV-7879)
    - Fixed an error that occurred when creating a contiguous dataset with a
      zero-sized dataspace and space allocation time set to 'early'.
      (QAK - 2012/03/12)
    - Changed Windows thread creation to use _beginthread() instead of
      CreateThread().  Threads created by the latter can be killed in
      low-memory situations. (DER - 2012/02/10 - HDFFV-7780)
    - Creating a dataset in a read-only file caused a segmentation fault when
      the file is closed.  It's fixed. The attempt to create a dataset will
      fail with an error indicating the file is read-only.
      (SLU - 2012/01/25 - HDFFV-7756)
    - Fixed a segmentation fault that could occur when shrinking a dataset
      with chunks larger than 1 MB. (NAF - 2011/11/30 - HDFFV-7833)
    - Fixed a bug that could cause H5Oget_info to return the wrong address
      after copying a committed (named) datatype. (NAF - 2011/11/14)
    - The library allowed the conversion of strings between ASCII and UTF8
      We have corrected it to report an error under this situation.
      (SLU - 2011/11/8 - HDFFV-7582)
    - Fixed a segmentation fault when the library tried to shrink the size
      of a compound datatype through H5Tset_size immediately after the
      datatype was created. (SLU - 2011/11/4 - HDFFV-7618)

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - h5unjam: Fixed a segmentation fault that occurred when h5unjam was used
      with the -V (show version) option. (JKM - 2012/04/19 - HDFFV-8001)
    - h5repack: Fixed a failure that occurred when repacking the chunk size
      of a specified chunked dataset with unlimited max dims.
      (JKM - 2012/04/11 - HDFFV-7993)
    - h5diff: Fixed a failure when comparing groups. Before the fix, if an
      object in a group was compared with an object in another group where
      both had the same name but the object type was different, then h5diff
      would fail. After the fix, h5diff detects such cases as non-comparable
      and displays appropriate error messages.
      (JKM - 2012/03/28 - HDFFV-7644)
    - h5diff: If unique objects exist only in one file and if h5diff is set to
      exclude the unique objects with the --exclude-path option, then h5diff
      might miss excluding some objects. This was fixed to correctly exclude
      objects. (JKM - 2012/03/20 - HDFFV-7837)
    - h5diff: When two symbolic dangling links are compared with the
      --follow-symlinks option, the result should be the same. This worked when
      comparing two files, but didn't work when comparing two objects.
      h5diff now works when comparing two objects.
      (JKM - 2012/03/09 - HDFFV-7835)
    - h5dump: Added the tools library error stack to properly catch error
      information generated within the library. (ADB - 2012/03/12 - HDFFV-7958)
    - h5dump: Changed the process where an open link used to fail. Now dangling
      links no longer throw error messages. (ADB - 2012/03/12 - HDFFV-7839)
    - h5dump: Refactored code to remove duplicated functions. Split XML
      functions from DDL functions. Corrected indentation and formatting
      errors. Also fixed subsetting counting overflow (HDFFV-5874). Verified
      all tools call tools_init() in main. The USER_BLOCK data now correctly
      displays within the SUPER_BLOCK info. NOTE: WHITESPACE IN THE OUTPUT
      HAS CHANGED. (ADB - 2012/02/17 - HDFFV-7560)
    - h5diff: Fixed to prevent from displaying error stack message when
      comparing two dangling symbolic links with the follow-symlinks option.
      (JKM - 2012/01/13 - HDFFV-7836)
    - h5repack: Fixed a memory leak that occurred with the handling of
      variable length strings in attributes.
      (JKM - 2012/01/10 - HDFFV-7840)
    - h5ls: Fixed a segmentation fault that occurred when accessing region
      reference data in an attribute. (JKM - 2012/01/06 - HDFFV-7838)

    F90 API
    -------
    - None

    C++ API
    ------
    - None

    High-Level APIs:
    ------
    - None

    Fortran High-Level APIs:
    ------
    - h5ltget_attribute_string_f: The h5ltget_attribute_string_f used to return
      the C NULL character in the returned character buffer. The returned
      character buffer now does not return the C NULL character; the buffer
      is blank-padded if needed. (MSB - 2012/03/23)


Platforms Tested
================
The following platforms and compilers have been tested for this release.

    AIX 5.3                       xlc 10.1.0.5
    (NASA G-ADA)                  xlC 10.1.0.5
                                  xlf90 12.1.0.6

    FreeBSD 8.2-STABLE i386       gcc 4.2.1 [FreeBSD] 20070719
    (loyalty)                     g++ 4.2.1 [FreeBSD] 20070719
                                  gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    FreeBSD 8.2-STABLE amd64      gcc 4.2.1 [FreeBSD] 20070719
    (freedom)                     g++ 4.2.1 [FreeBSD] 20070719
                                  gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    Linux 2.6.18-194.3.1.el5PAE   GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP i686 i686 i386         compilers for 32-bit applications;
    (jam)                             Version 4.1.2 20080704 (Red Hat 4.1.2-52)
                                      Version 4.5.2
                                  PGI C, Fortran, C++ Compilers for 32-bit
                                  applications;
                                      Version 11.8-0
                                      Version 11.9-0
                                  Intel(R) C, C++, Fortran Compiler for 32-bit
                                  applications;
                                      Version 12.0
                                      Version 12.1
                                  MPICH mpich2-1.3.1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    Linux 2.6.18-308.1.1.el5      GNU C (gcc), Fortran (gfortran), C++ (g++)
    #1 SMP x86_64 GNU/Linux       compilers for 32-bit applications;
    (koala)                           Version 4.1.2 20080704 (Red Hat 4.1.2-52)
                                      Version 4.5.2
                                  PGI C, Fortran, C++ for 64-bit target on
                                  x86-64;
                                      Version 11.9-0 (64-bit)
                                      Version 11.8-0 (32-bit)
                                  Intel(R) C, C++, Fortran Compilers for
                                  applications running on Intel(R) 64;
                                      Version 12.0
                                      Version 12.1
                                  MPICH mpich2-1.3.1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    Linux 2.6.32-220.7.1.el6.ppc64 gcc (GCC) 4.4.6 20110731 (Red Hat 4.4.6-3)
    #1 SMP ppc64 GNU/Linux        g++ (GCC) 4.4.6 20110731
    (ostrich)                     GNU Fortran (GCC) 4.4.6 20110731 (Red Hat 4.4.6-3)

    Linux 2.6.18-108chaos         Intel C, C++, Fortran Compilers Version 11.1
    #1 SMP x86_64 GNU/Linux
    (LLNL Aztec)

    IBM Blue Gene/P               XL C for Blue Gene/P, bgxlc V9.0
    (LLNL uDawn)                  XL C++ for Blue Gene/P, bgxlC V9.0
                                  XL Fortran for Blue Gene/P, bgxlf0 V11.1

    SunOS 5.10 32- and 64-bit     Sun C 5.9 Sun OS_sparc Patch 124867-16
    (linew)                       Sun Fortran 95 8.3 Sun OS_sparc Patch 127000-13
                                  Sun C++ 5.9 Sun OS_sparc Patch 124863-26
                                  Sun C 5.11 SunOS_sparc
                                  Sun Fortran 95 8.5 SunOS_sparc
                                  Sun C++ 5.11 SunOS_sparc

    SGI Altix UV                  Intel(R) C, Fortran Compilers
    SGI ProPack 7 Linux               Version 11.1 20100806
    2.6.32.24-0.2.1.2230.2.PTF-   SGI MPT 2.02
    default #1 SMP
    (NCSA ember)

    Dell NVIDIA Cluster           Intel(R) C, Fortran Compilers
    Red Hat Enterprise Linux 6        Version 12.0.4 20110427
    2.6.32-131.4.1.el6.x86_64     mvapich2 1.7rc1-intel-12.0.4
    (NCSA forge)

    Windows XP                    Visual Studio 2008 w/ Intel Fortran 10.1 (project files)
                                  Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)

    Windows XP x64                Visual Studio 2008 w/ Intel Fortran 10.1 (project files)
                                  Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)

    Windows 7                     Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)
                                  Cygwin(1.7.9 native gcc(4.5.3) compiler and gfortran)

    Windows 7 x64                 Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 w/ Intel Fortran 12 (cmake)
                                  Cygwin(1.7.9 native gcc(4.5.3) compiler and gfortran)

    Mac OS X Snow Leopard 10.6.8  i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (gcc)
    Darwin Kernel Version 10.8.0  i686-apple-darwin10-g++-4.2.1 (GCC) 4.2.1 (g++)
    Intel 64-bit                      (Apple Inc. build 5666) (dot 3)
    (fred)                        GNU Fortran (GCC) 4.6.1 (gfortran)
                                  Intel C (icc), Fortran (ifort), C++ (icpc)
                                      12.1.0.038 Build 20110811

    Mac OS X Snow Leopard 10.6.8  i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (gcc)
    Darwin Kernel Version 10.8.0  i686-apple-darwin10-g++-4.2.1 (GCC) 4.2.1 (g++)
    Intel 32-bit                      (Apple Inc. build 5666) (dot 3)
    (tejeda)                      GNU Fortran (GCC) 4.6.1 (gfortran)
                                  Intel C (icc), Fortran (ifort), C++ (icpc)
                                      12.1.0.038 Build 20110811

    Mac OS X Lion 10.7.3          GCC 4.2.1 gcc
    32- and 64-bit                GNU Fortran (GCC) 4.6.1 gfortran
    (duck)                        GCC 4.2.1. g++

    Debian6.0.3 2.6.32-5-686 #1 SMP i686 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5

    Debian6.0.3 2.6.32-5-amd64 #1 SMP x86_64 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5

    Fedora16 3.2.9-2.fc16.i6866 #1 SMP i686 i686 i386 GNU/Linux
                                  gcc (GCC) 4.6.2 20111027 (Red Hat 4.6.2-1)
                                  GNU Fortran (GCC) 4.6.2 20111027 (Red Hat 4.6.2-1)

    Fedora16 3.2.9-2.fc16.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.6.2 20111027 (Red Hat 4.6.2-1)
                                  GNU Fortran (GCC) 4.6.2 20111027 (Red Hat 4.6.2-1)

    SUSE 12.1 3.1.9-1.4-desktop #1 SMP PREEMPT i686 i686 i386 GNU/Linux
                                  gcc (SUSE Linux) 4.6.2
                                  GNU Fortran (SUSE Linux) 4.6.2

    SUSE 12.1 3.1.9-1.4-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.6.2
                                  GNU Fortran (SUSE Linux) 4.6.2

    Ubuntu 11.10 3.0.0-16-generic #29-Ubuntu SMP i686 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
                                  GNU Fortran (Ubuntu/Linaro 4.6.4-9ubuntu3) 4.6.1

    Ubuntu 11.10 3.0.0-16-generic #29-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
                                  GNU Fortran (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1

    Cray Linux Environment (CLE)  PrgEnv-pgi 2.2.74
    hopper.nersc.gov              pgcc 11.9-0 64-bit target on x86-64 Linux -tp k8e
                                  pgf90 11.9-0 64-bit target on x86-64 Linux -tp k8e
                                  pgCC 11.9-0 64-bit target on x86-64 Linux -tp k8e


Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                                 C        F90    F90      C++   zlib  SZIP
                                         parallel        parallel
Solaris2.10 32-bit                         n        y      n        y     y     y
Solaris2.10 64-bit                         n        y      n        y     y     y
Windows XP                                 n        y(4)   n        y     y     y
Windows XP x64                             n        y(4)   n        y     y     y
Windows Vista                              n        y(4)   n        y     y     y
Windows Vista x64                          n        y(4)   n        y     y     y
Mac OS X Snow Leopard 10.6.8 32-bit        n        y      n        y     y     n
Mac OS X Snow Leopard 10.6.8 64-bit        n        y      n        y     y     y
Mac OS X Lion 10.7.3 32-bit                n        y      n        y     y     n
Mac OS X Lion 10.7.3 64-bit                n        y      n        y     y     y
AIX 5.3 32- and 64-bit                     y        y      y        y     y     y
FreeBSD 8.2-STABLE 32&64 bit               n        x      n        x     y     y
CentOS 5.5 Linux 2.6.18-194 i686 GNU (1)W  y        y(2)   y        y     y     y
CentOS 5.5 Linux 2.6.18-194 i686 Intel  W  n        y      n        y     y     y
CentOS 5.5 Linux 2.6.18-194 i686 PGI    W  n        y      n        y     y     y
CentOS 5.5 Linux 2.6.18 x86_64 GNU (1)  W  y        y(3)   y        y     y     y
CentOS 5.5 Linux 2.6.18 x86_64 Intel    W  n        y      n        y     y     y
CentOS 5.5 Linux 2.6.18 x86_64 PGI      W  n        y      n        y     y     y
Linux 2.6.32-220.7.1.el6.ppc64             n        y      n        y     y     y
SGI ProPack 7 Linux 2.6.32.24              y        y      y        y     y     y
Red Hat Enterprise Linux 6                 y        y      y        y     y     y
CLE hopper.nersc.gov                       y        y(3)   y        y     y     n


Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
Solaris2.10 32-bit                         y       y         y         y
Solaris2.10 64-bit                         n       n         n         n
Windows XP                                 y       y(4)      y         n
Windows XP x64                             y       y(4)      y         n
Windows Vista                              y       y(4)      y         y
Windows Vista x64                          y       y(4)      y         y
Mac OS X Snow Leopard 10.6.8 32-bit        y       n         y         n
Mac OS X Snow Leopard 10.6.8 64-bit        y       n         y         n
Mac OS X Lion 10.7.3 32-bit                y       n         y         y
Mac OS X Lion 10.7.3 64-bit                y       n         y         y
AIX 5.3 32- and 64-bit                     n       n         n         y
FreeBSD 8.2-STABLE 32&64 bit               y       x         x         y
CentOS 5.5 Linux 2.6.18-194 i686 GNU (1)W  y       y(2)      y         y
CentOS 5.5 Linux 2.6.18-194 i686 Intel  W  y       y         y         n
CentOS 5.5 Linux 2.6.18-194 i686 PGI    W  y       y         y         n
CentOS 5.5 Linux 2.6.18 x86_64 GNU (1)  W  y       y         y         y
CentOS 5.5 Linux 2.6.18 x86_64 Intel    W  y       y         y         n
CentOS 5.5 Linux 2.6.18 x86_64 PGI      W  y       y         y         n
Linux 2.6.32-220.7.1.el6.ppc64             y       y         y         n
SGI ProPack 7 Linux 2.6.32.24              y       y         y         n
Red Hat Enterprise Linux 6                 y       y         y         n
CLE hopper.nersc.gov                       n       n         n         n

           (1) Fortran compiled with gfortran.
           (2) With PGI and Absoft compilers.
           (3) With PGI compiler for Fortran.
           (4) Using Visual Studio 2008 w/ Intel Fortran 10.1 (Cygwin shared libraries are not supported)
           (5) C and C++ shared libraries will not be built when Fortran is enabled.
    Compiler versions for each platform are listed in the preceding
    "Platforms Tested" table.


Known Problems
==============
* The h5repacktst test fails on AIX 32-bit because the test uses more
  memory than the default amount. The failure message typically looks like:

    "time: 0551-010 The process was stopped abnormally. Try again."

  This is an issue with the test only and does not represent a problem with
  the library. To allow the test to pass, request more memory when testing
  via appropriate command such as:

    $ env LDR_CNRTL=MAXDATA=0x20000000@DSA make check

  (AKC - 2012/05/09 - HDFFV-8016)

* The file_image test will fail in the "initial file image and callbacks in
  the core VFD" sub-test if the source directory is read-only as the test
  fails to create its test files in the build directory. This will be
  resolved in a future release.
  (AKC - 2012/05/05 - HDFFV-8009)

* The dt_arith test reports several errors involving "long double" on
  Mac OS X 10.7 Lion when any level of optimization is enabled. The test does
  not fail in debug mode. This will be addressed in a future release.
  (SLU - 2012/05/08)

* The following h5dump test case fails in BG/P machines (and potentially other
  machines that use a command script to launch executables):

   h5dump --no-compact-subset -d "AHFINDERDIRECT::ah_centroid_t[0] it=0 tl=0"
     tno-subset.h5

  This is due to the embedded spaces in the dataset name being interpreted
  by the command script launcher as meta-characters, thus passing three
  arguments to h5dump's -d flag. The command passes if run by hand, just
  not via the test script.
  (AKC - 2012/05/03)

* The ph5diff (parallel h5diff) tool can intermittently hang in parallel mode
  when comparing two HDF5 files that contain objects with the same names but
  with different object types.
  (JKM - 2012/04/27)

* On hopper, the build failed when RUNSERIAL and RUNPARALLEL are set
  to aprun -np X, because the H5lib_settings.c file was not generated
  properly. Not setting those environment variables works, because
  configure was able to automatically detect that it's a Cray system
  and used the proper launch commands when necessary.
  (MSC - 2012/04/18)

* The data conversion test dt_arith.c fails in "long double" to integer
  conversion on Ubuntu 11.10 (3.0.0.13 kernel) with GCC 4.6.1 if the library
  is built with optimization -O3 or -O2.  The older GCC (4.5) or newer kernel
  (3.2.2 on Fedora) doesn't have the problem.  Users should lower the
  optimization level (-O1 or -O0) by defining CFLAGS in the command line of
  "configure" like:

      CFLAGS=-O1 ./configure

  This will overwrite the library's default optimization level.
  (SLU - 2012/02/07 - HDFFV-7829)

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release.
  (DER - 2011/10/14)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in a future release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value.
  (AKC - 2011/05/07)

* The C++ and FORTRAN bindings are not currently working on FreeBSD.
  (QAK - 2011/04/26)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. We are looking into the issue. HL and C++ shared libraries
  should now be working as intended, however.
  (MAM - 2011/04/20)

* The --with-mpe configure option does not work with Mpich2.
  (AKC - 2011/03/10)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* The library's test dt_arith.c showed a compiler's rounding problem on
  Cygwin when converting from unsigned long long to long double.  The
  library's own conversion works fine.  We defined a macro for Cygwin to
  skip this test until we can solve the problem.
  (SLU - 2010/05/05 - HDFFV-1264)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* MinGW has a missing libstdc++.dll.a library file and will not successfully link
  C++ applications/tests. Do not use the enable-cxx configure option. Read all of
  the INSTALL_MINGW.txt file for all restrictions.
  (ADB - 2009/11/11)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* The PathScale MPI implementation, accessing a Panasas file system, would
  cause H5Fcreate() with H5F_ACC_EXCL to fail even when the file does not
  exist. This is due to the MPI_File_open() call failing if the mode has
  the MPI_MODE_EXCL bit set.
  (AKC - 2009/08/11 - HDFFV-988)

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO.
  (CMC - 2009/04/28)

* For Red Storm, a Cray XT3 system, the tools/h5ls/testh5ls.sh and
  tools/h5copy/testh5copy.sh will fail some of its sub-tests. These sub-tests
  are expected to fail and should exit with a non-zero code but the yod
  command does not propagate the exit code of the executables. Yod always
  returns 0 if it can launch the executable.  The test suite shell expects
  a non-zero for this particular test, therefore it concludes the test has
  failed when it receives 0 from yod.  Skip all the "failing" test for now
  by changing them as following.

  ======== Original tools/h5ls/testh5ls.sh =========
  TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ======== Change to ===============================
  echo SKIP TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ==================================================

  ======== Original tools/h5copy/testh5copy.sh =========
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  H5LSTEST $FILEOUT
  ======== Change to ===============================
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  echo SKIP H5LSTEST $FILEOUT
  ==================================================
  (AKC - 2008/11/10)

* For Red Storm, a Cray XT3 system, the yod command sometimes gives the
  message,  "yod allocation delayed for node recovery".  This interferes with
  test suites that do not expect to see this message.  See the section of "Red
  Storm" in file INSTALL_parallel for a way to deal with this problem.
  (AKC - 2008/05/28)

* On an Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* On mpich 1.2.5 and 1.2.6, if more than two processes contribute no IO and
  the application asks to do collective IO, we have found that when using 4
  processors, a simple collective write will sometimes be hung. This can be
  verified with t_mpi test under testpar.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)

* On IBM AIX systems, parallel HDF5 mode will fail some tests with error
  messages like "INFO: 0031-XXX ...".  This is from the command `poe'.
  Set the environment variable MP_INFOLEVEL to 0 to minimize the messages
  and run the tests again.

  The tests may fail with messages like "The socket name is already in use",
  but HDF5 does not use sockets.  This failure is due to problems with the
  poe command trying to set up the debug socket.  To resolve this problem,
  check to see whether there are many old /tmp/s.pedb.* files staying around.
  These are sockets used by the poe command and left behind due to failed
  commands.  First, ask your system administrator to clean them out.
  Lastly, request IBM to provide a means to run poe without the debug socket.
  (AKC - 2004/12/08)


%%%%1.8.8%%%%


HDF5 version 1.8.8 released on 2011-11-15
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.7 and
HDF5 1.8.8, and contains information on the platforms tested and
known problems in HDF5-1.8.8.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.8 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.8 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.8 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.8 (current
release) versus Release 1.8.7":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.7
- Platforms Tested
- Supported Configuration Features Summary
- Known Problems


New Features
============

    Configuration
    -------------
    - Added the --enable-fortran2003 flag to enable Fortran2003 support
      in the HDF5 Fortran library. The flag should be used along with the
      --enable-fortran flag and takes affect only when the Fortran compiler
      is Fortran2003 compliant. (EIP - 2011/11/14)
    - Added checks for clock_gettime and mach/mach_time.h to both configure and
      CMake.  This will support the move from gettimeofday to clock_gettime's
      monotonic timer in the profiling code in a future release.
      (DER - 2011/10/12)

    Library
    -------
    - The Windows VFD code has been removed with the exception of the functions
      which set it (H5Pset_fapl_windows, for example).  Setting the Windows
      VFD now really sets the SEC2 VFD.  The WINDOWS_MAX_BUF and
      WINDOWS_USE_STDIO configuration options and #defines have also been
      removed. NOTE: Since the Windows VFD was a clone of the SEC2 VFD, this
      change should be transparent to users.
      (DER - 2011/10/12 - HDFFV-7740, HDFFV-7744)
    - H5Tcreate now supports the string type (fixed-length and variable-
      length). (SLU - 2011/05/20)

    Parallel Library
    ----------------
    - Added new H5Pget_mpio_actual_chunk_opt_mode and
      H5Pget_mpio_actual_io_mode API routines for querying whether/how
      a collective I/O operation completed.  (QAK - 2011/10/12)

    Tools
    -----
    - None

    High-Level APIs
    ---------------
    - Added the following Fortran wrappers for the Dimension Scale APIs:
        h5dsset_scale_f
        h5dsattach_scale_f
        h5dsdetach_scale_f
        h5dsis_attached_f
        h5dsis_scale_f
        h5dsset_label_f
        h5dsget_label_f
        h5dsget_scale_name_f
        h5dsget_num_scales_f
      (EIP for SB - 2011/10/13 - HDFFV-3797)

    Fortran API
    -----------
    - The HDF5 Fortran library was enhanced to support the Fortran 2003 standard.
      The following features are available when the HDF5 library is configured
      using the --enable-fortran and --enable-fortran2003 configure flags AND
      if the Fortran compiler is Fortran 2003 compliant:

      - Subroutines overloaded with the C_PTR derived type:
          h5pget_f
          h5pget_fill_value_f
          h5pinsert_f
          h5pregister_f
          h5pset_f
          h5pset_fill_value_f
          h5rcreate_f
          h5rderefrence_f
          h5rget_name_f
          h5rget_obj_type_f
      - Subroutines overloaded with the C_PTR derived type
        and simplified signatures:
          h5aread_f
          h5awrite_f
          h5dread_f
          h5dwrite_f
      - New subroutines
          h5dvlen_reclaim_f
          h5literate_by_name_f
          h5literate_f
          h5ovisit_f
          h5tconvert_f
          h5pset_nbit_f
          h5pset_scaleoffset_f
      - Subroutines with additional optional parameters:
          h5pcreate_class_f
      (EIP - 2011/10/14)

    C++ API
    -------
    - None


Support for New Platforms, Languages, and Compilers
===================================================
    - None

Bug Fixes since HDF5-1.8.7
==========================

    Configuration
    -------------
    - Changed the size of H5_SIZEOF_OFF_T to 4 bytes (was 8) in the VMS
      h5pubconf.h based on the output of a test program.  (DER - 2011/10/12)
    - The Windows and VMS versions of H5pubconf.h were brought into sync with
      the linux/posix version. (DER - 2011/10/12)
    - Fixed a bug in the bin/trace Perl script where API functions
      that take a variable number of arguments were not processed for
      trace statement fixup. (DER - 2011/08/25)
    - The --enable-h5dump-packed-bits configure option has been removed.
      The h5dump code that this option conditionally enabled is now always
      compiled into h5dump. Please refer to the h5dump reference manual for
      usage of the packed bits feature. (MAM - 2011/06/23 - HDFFV-7592)
    - Configure now uses the same flags and symbols in its tests that are
      used to build the library. (DER - 2011/05/24)

    Library
    -------
    - Corrected the error when copying attributes between files which are using
      different versions of the file format. (QAK - 2011/10/20 - HDFFV-7718)
    - Corrected the error when loading local heaps from the file, which could
      cause the size of the local heap's data block to increase dramatically.
      (QAK - 2011/10/14 - HDFFV-7767)
    - An application does not need to do H5O_move_msgs_forward() when writing
      attributes. Tests were checked into the performance suite.
      (VC - 2011/10/13 - HDFFV-7640)
    - Fixed a bug that occurred when using H5Ocopy on a committed datatype
      containing an attribute using that committed datatype.
      (NAF - 2011/10/13 - HDFFV-5854)
    - Added generic VFD I/O types to the SEC2 and log VFDs to ensure correct
      I/O sizes (and remove compiler warnings) between Windows and true POSIX
      systems.  (DER - 2011/10/12)
    - Corrected some Windows behavior in the SEC2 and log VFDs.  This mainly
      involved datatype correctness fixes, Windows API call error checks,
      and adding the volume serial number to the VFD cmp functions.
      (DER - 2011/10/12)
    - Converted post-checks for the appropriate POSIX I/O sizes to pre-checks
      in order to avoid platform-specific or undefined behavior.
      (DER - 2011/10/12)
    - #ifdef _WIN32 instances have been changed to #ifdef H5_HAVE_WIN32_API.
      H5_HAVE_VISUAL_STUDIO checks have been added where necessary. This is in
      CMake only as configure never sets _WIN32. (ADB - 2011/09/12)
    - CLANG compiler with the options -fcatch-undefined-behavior and -ftrapv
      discovered 3 problems in tests and tools' library:
        1. In dsets.c, left shifting an unsigned int for 32 bits or more
           caused undefined behavior.
        2. In dt_arith.c, the INIT_INTEGER macro definition has an overflow
           when the value is a negative minimal and is being subtracted from one.
        3. In tools/lib/h5tools_str.c, right shifting an int value for 32 bits
           or more caused undefined behavior.
      All the problems have been corrected. (SLU - 2011/09/02 - HDFFV-7674)
    - H5Epush2() now has the correct trace functionality (this is related to the
      bin/trace Perl script bug noted in the configure section).
      (DER - 2011/08/25)
    - Corrected mismatched function name typo of h5pget_dxpl_mpio_c and
      h5pfill_value_defined_c. (AKC - 2011/08/22 - HDFFV-7641)
    - Corrected an internal error in the library where objects that use committed
      (named) datatypes and were accessed from two different file IDs could confuse
      the two and cause erroneous failures. (QAK - 2011/07/18 - HDFFV-7638)
    - In v1.6 of the library, there was an EOA for the whole MULTI file saved in the
      super block.  We took it out in v1.8 of the library because it's meaningless
      for the MULTI file. v1.8 of the library saves the EOA for the metadata file
      instead, but this caused a backward compatibility problem.
      A v1.8 library couldn't open the file created with the v1.6 library. We
      fixed the problem by checking the EOA value to detect the file
      created with v1.6 library. (SLU - 2011/06/22)
    - When a dataset had filters and reading data failed, the error message
      didn't say which filter wasn't registered. It's fixed now. (SLU - 2011/06/03)

    Parallel Library
    ----------------
    - The Special Collective IO (IO when some processes do not contribute to the
      IO) and the Complex Derived Datatype MPI functionalities are no longer
      conditionally enabled in the library by configure. They are always
      enabled in order to take advantage of performance boosts from these
      behaviors. Older MPI implementations that do not allow for these
      functionalities can no longer by used by HDF5.
      (MAM - 2011/07/08 - HDFFV-7639).

    Tools
    -----
    - h5diff: fixed segfault over non-comparable attribute with different
      dimension or rank, along with '-c' option to display details.
      (JKM - 2011/10/24 - HDFFV-7770)
    - Fixed h5diff to display all the comparable objects and attributes
      regardless of detecting non-comparables. (JKM - 2011/09/16 - HDFFV-7693)
    - Fixed h5repack to update the values of references(object and region) of
      attributes in h5repack for 1) references, 2) arrays of references,
      3) variable-length references, and 4) compound references.
      (PC - 2011/09/14 - HDFFV-5932)
    - h5diff: fixed a segfault over a dataset with container types
      array and variable-length (vlen) along with multiple nested compound types.
      Example: compound->array->compound, compound->vlen->compound.
      (JKM - 2011/09/01 - HDFFV-7712)
    - h5repack: added macro to handle a failure in H5Dread/write when memory
      allocation failed inside the library. (PC - 2011/08/19)
    - Fixed h5jam to not to allow the specifying of an HDF5 formatted file as
      an input file for the -u (user block file) option. The original HDF5 file
      would not be accessible if this behavior was allowed.
      (JKM - 2011/08/19 - HDFFV-5941)
    - Revised the command help pages of h5jam and h5unjam. The descriptions
      were not up to date and some were missing.
      (JKM - 2011/08/15 - HDFFV-7515)
    - Fixed h5dump to correct the schema location:
      <hdf5:HDF5-File
      xmlns:hdf5="http://hdfgroup.org/HDF5/XML/schema/HDF5-File"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://hdfgroup.org/HDF5/XML/schema/HDF5-File
      http://www.hdfgroup.org/HDF5/XML/schema/HDF5-File.xsd">
      (ADB - 2011/08/10)
    - h5repack: h5repack failed to copy a dataset if the layout is changed
      from chunked with unlimited dimensions to contiguous.
      (PC - 2011/07/15 - HDFFV-7649)
    - Fixed h5diff: the "--delta" option considers two NaN of the same type
      are different. This is wrong based on the h5diff description in the
      Reference Manual. (PC - 2011/07/15 - HDFFV-7656)
    - Fixed h5diff to display an instructive error message and exit with
      an instructive error message when mutually exclusive options
      (-d, -p and --use-system-epsilon) are used together.
      (JKM - 2011/07/07 - HDFFV-7600)
    - Fixed h5dump so that it displays the first line of each element in correct
      position for multiple dimension array types. Before this fix,
      the first line of each element in an array was
      displayed after the last line of previous element without
      moving to the next line (+indentation).
      (JKM - 2011/06/15 - HDFFV-5878)
    - Fixed h5dump so that it will display the correct value for
      H5T_STD_I8LE datasets on the Blue-gene system (ppc64, linux, Big-Endian,
      clustering). (AKC & JKM - 2011/05/12 - HDFFV-7594)
    - Fixed h5diff to compare a file to itself correctly. Previously h5diff
      reported either the files were different or not compatible in certain
      cases even when comparing a file to itself. This fix also improves
      performance when comparing the same target objects through verifying
      the object and file addresses before comparing the details
      in the objects. Examples of details are datasets and attributes.
      (XCAO & JKM - 2011/05/06 - HDFFV-5928)

    F90 API
    -------
    - Modified the h5open_f and h5close_f subroutines to not to call H5open
      and H5close correspondingly. While the H5open call just adds overhead,
      the H5close call called by a Fortran application shuts down the HDF5
      library. This makes the library inaccessible to the application.
      (EIP & SB - 2011/10/13 - HDFFV-915)
    - Fixed h5tget_tag_f where the length of the C string was used to
      repack the C string into the Fortran string. This lead to memory
      corruption in the calling program. (SB - 2011/07/26)
    - Added defined constants:
        H5T_ORDER_MIXED_F (HDFFV-2767)
        H5Z_SO_FLOAT_DSCALE_F
        H5Z_SO_FLOAT_ESCALE_F
        H5Z_SO_INT_F
        H5Z_SO_INT_MINBITS_DEFAULT_F
        H5O_TYPE_UNKNOWN_F
        H5O_TYPE_GROUP_F
        H5O_TYPE_DATASET_F
        H5O_TYPE_NAMED_DATATYPE_F
        H5O_TYPE_NTYPES_F

    C++ API
    ------
    - None

    High-Level APIs:
    ------
    - Fixed the H5LTdtype_to_text function.  It had some memory problems when
      dealing with some complicated data types. (SLU - 2011/10/19 - HDFFV-7701)
    - Fixed H5DSset_label seg faulting when retrieving the length of a
      dimension label that was not set. (SB - 2011/08/07 - HDFFV-7673)
    - Fixed a dimension scale bug where if you create a dimscale, attach two
      datasets to it, and then unattach them, you get an error if they are
      unattached in order, but no error if you unattach them in reverse order.
      (SB - 2011/06/07 - HDFFV-7605)

    Fortran High-Level APIs:
    ------
    - None


Platforms Tested
================
The following platforms and compilers have been tested for this release.

    AIX 5.3                       xlc 10.1.0.5
    (NASA G-ADA)                  xlC 10.1.0.5
                                  xlf90 12.1.0.6

    FreeBSD 8.2-STABLE i386       gcc 4.2.1 [FreeBSD] 20070719
    (loyalty)                     g++ 4.2.1 [FreeBSD] 20070719
                                  gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    FreeBSD 8.2-STABLE amd64      gcc 4.2.1 [FreeBSD] 20070719
    (freedom)                     g++ 4.2.1 [FreeBSD] 20070719
                                  gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    IBM Blue Gene/P               bgxlc 9.0.0.9
    (LLNL uDawn)                  bgxlf90 11.1.0.7
                                  bgxlC 9.0.0.9

    Linux 2.6.16.60-0.54.5-smp    Intel(R) C, C++, Fortran Compilers
    x86_64                            Version 11.1 20090630
    (INL Icestorm)

    Linux 2.6.18-194.el5 x86_64   Intel(R) C, C++, Fortran Compilers
    (INL Fission)                     Version 12.0.2 20110112

    Linux 2.6.18-108chaos x86_64  Intel(R) C, C++, Fortran Compilers
    (LLNL Aztec)                      Version 11.1 20090630

    Linux 2.6.18-194.3.1.el5PAE   gcc (GCC) 4.1.2 and 4.4.2
    #1 SMP i686 i686 i386         GNU Fortran (GCC) 4.1.2 20080704
    (jam)                             (Red Hat 4.1.2-48) and 4.4.2
                                  PGI C, Fortran, C++ 10.4-0 32-bit
                                  PGI C, Fortran, C++ 10.6-0 32-bit
                                  Intel(R) C Compiler for 32-bit
                                      applications, Version 11.1
                                  Intel(R) C++ Compiler for 32-bit
                                      applications, Version 11.1
                                  Intel(R) Fortran Compiler for 32-bit
                                      applications, Version 11.1
                                  MPICH mpich2-1.3.1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    Linux 2.6.18-238.12.1.el5     gcc 4.1.2 and 4.4.2
    #1 SMP x86_64 GNU/Linux       GNU Fortran (GCC) 4.1.2 20080704
    (koala)                           (Red Hat 4.1.2-46) and 4.4.2
                                      tested for both 32- and 64-bit binaries
                                  Intel(R) C, C++, Fortran Compilers for
                                      applications running on Intel(R) 64,
                                      Version 11.1.
                                  PGI C, Fortran, C++ Version 9.0-4
                                      for 64-bit target on x86-64
                                  MPICH mpich2-1.3.1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    SGI Altix UV                  Intel(R) C, Fortran Compilers
    SGI ProPack 7 Linux               Version 11.1 20100806
    2.6.32.24-0.2.1.2230.2.PTF-   SGI MPT 2.02
    default #1 SMP
    (NCSA ember)

    Dell NVIDIA Cluster           Intel(R) C, Fortran Compilers
    Red Hat Enterprise Linux 6        Version 12.0.4 20110427
    2.6.32-131.4.1.el6.x86_64     mvapich2 1.7rc1-intel-12.0.4
    (NCSA forge)

    SunOS 5.10 32- and 64-bit     Sun C 5.11 SunOS_sparc 2010/08/13
                                  Sun Fortran 95 8.5 SunOS_sparc 2010/08/13
                                  Sun C++ 5.11 SunOS_sparc 2010/08/13

    Windows XP                    Visual Studio 2008 w/ Intel Fortran 10.1 (project files)
                                  Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 (cmake)
                                  Cygwin(1.7.9 native gcc(4.5.3) compiler and gfortran)

    Windows XP x64                Visual Studio 2008 w/ Intel Fortran 10.1 (project files)
                                  Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 (cmake)
                                  Cygwin(1.7.9 native gcc(4.5.3) compiler and gfortran)

    Windows Vista                 Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Windows Vista x64             Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Windows 7                     Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Windows 7 x64                 Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Mac OS X 10.8.0 (Intel 64-bit) i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3)
    Darwin Kernel Version 10.8.0  GNU Fortran (GCC) 4.6.1
                                  Intel C, C++ and Fortran compilers 12.1.0

    Mac OS X 10.8.0 (Intel 32-bit) i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3)
    Darwin Kernel Version 10.8.0  GNU Fortran (GCC) version 4.6.1
          Intel C, C++ and Fortran compilers 12.1.0

    Fedora 12 2.6.32.16-150.fc12.ppc64 #1 SMP ppc64 GNU/Linux
                                  gcc (GCC) 4.4.4 20100630 (Red Hat 4.4.4-10)
                                  GNU Fortran (GCC) 4.4.4 20100630 (Red Hat 4.4.4-10)

    Debian6.0.3 2.6.32-5-686 #1 SMP i686 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5

    Debian6.0.3 2.6.32-5-amd64 #1 SMP x86_64 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5

    Fedora15 2.6.40.6-0.fc15.i686.PAE #1 SMP i686 i686 i386 GNU/Linux
                                  gcc (GCC) 4.6.1 20110908 (Red Hat 4.6.1-9)
                                  GNU Fortran (GCC) 4.6.1 20110908 (Red Hat 4.6.1-9)

    Fedora15 2.6.40.6-0.fc15.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.6.1 20110908 (Red Hat 4.6.1-9)
                                  GNU Fortran (GCC) 4.6.1 20110908 (Red Hat 4.6.1-9)

    SUSE 11.4 2.6.37.6-0.7-desktop #1 SMP PREEMPT i686 i686 i386 GNU/Linux
                                  gcc (SUSE Linux) 4.5.1 20101208
                                  GNU Fortran (SUSE Linux) 4.5.1 20101208

    SUSE 11.4 2.6.37.6-0.7-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.5.1 20101208
                                  GNU Fortran (SUSE Linux) 4.5.1 20101208

    Ubuntu 11.10 3.0.0-12-generic #20-Ubuntu SMP i686 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
                                  GNU Fortran (Ubuntu/Linaro 4.6.4-9ubuntu3) 4.6.1

    Ubuntu 11.10 3.0.0-12-generic #20-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1
                                  GNU Fortran (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1

    OpenVMS Alpha 8.3             HP C V7.3-009
                                  HP Fortran V8.2-104679-48H9K
                                  HP C++ V7.3-009

    Cray Linux Environment (CLE)  PrgEnv-pgi 2.2.74
    hopper.nersc.gov              pgcc 11.7-0 64-bit target on x86-64 Linux -tp k8e
    franklin.nersc.gov            pgf90 11.7-0 64-bit target on x86-64 Linux -tp k8e
                                  pgCC 11.7-0 64-bit target on x86-64 Linux -tp k8e

Tested Configuration Features Summary
=====================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                                 C        F90    F90      C++   zlib  SZIP
                                         parallel        parallel
Solaris2.10 32-bit                         n        y      n        y     y    y
Solaris2.10 64-bit                         n        y      n        y     y    y
Windows XP                                 n        y(4)   n        y     y    y
Windows XP x64                             n        y(4)   n        y     y    y
Windows Vista                              n        y(4)   n        y     y    y
Windows Vista x64                          n        y(4)   n        y     y    y
OpenVMS Alpha                              n        y      n        y     y    n
Mac OS X 10.8 Intel 32-bit                 n        y      n        y     y    y
Mac OS X 10.8 Intel 64-bit                 n        y      n        y     y    y
AIX 5.3 32- and 64-bit                     n        y      n        y     y    y
FreeBSD 8.2-STABLE 32&64 bit               n        x      n        x     y    y
CentOS 5.5 Linux 2.6.18-194 i686 GNU (1)W  y        y(2)   y        y     y    y
CentOS 5.5 Linux 2.6.18-194 i686 Intel  W  n        y      n        y     y    n
CentOS 5.5 Linux 2.6.18-194 i686 PGI    W  n        y      n        y     y    n
CentOS 5.5 Linux 2.6.16 x86_64 GNU (1)  W  y        y(3)   y        y     y    y
CentOS 5.5 Linux 2.6.16 x86_64 Intel    W  n        y      n        y     y    n
CentOS 5.5 Linux 2.6.16 x86_64 PGI      W  n        y      n        y     y    y
Fedora 12 Linux 2.6.32.16-150.fc12.ppc64   n        y      n        y     y    y
SGI ProPack 7 Linux 2.6.32.24              y        y      y        y     y    y
Red Hat Enterprise Linux 6                 y        y      y        y     y    y
CLE hopper.nersc.gov                       y        y(3)   y        y     y    n
CLE franklin.nersc.gov                     y        y(3)   y        y     y    n


Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
Solaris2.10 32-bit                         y       y         y         y
Solaris2.10 64-bit                         y       y         y         y
Windows XP                                 y       y(4)      y         n
Windows XP x64                             y       y(4)      y         n
Windows Vista                              y       y(4)      y         y
Windows Vista x64                          y       y(4)      y         y
OpenVMS Alpha                              n       n         n         n
Mac OS X 10.8 Intel 32-bit                 y(5)    n         y         n
Mac OS X 10.8 Intel 64-bit                 y(5)    n         y         n
AIX 5.3 32- and 64-bit                     n       n         n         y
FreeBSD 8.2-STABLE 32&64 bit               y       x         x         y
CentOS 5.5 Linux 2.6.18-128 i686 GNU (1)W  y       y(2)      y         y
CentOS 5.5 Linux 2.6.18-128 i686 Intel  W  y       y         y         n
CentOS 5.5 Linux 2.6.18-128 i686 PGI    W  y       y         y         n
CentOS 5.5 Linux 2.6.16 x86_64 GNU (1)  W  y       y         y         y
CentOS 5.5 Linux 2.6.16 x86_64 Intel    W  y       y         y         n
CentOS 5.5 Linux 2.6.16 x86_64 PGI      W  y       y         y         n
Fedora 12 Linux 2.6.32.16-150.fc12.ppc64   y       y         y         y
SGI ProPack 7 Linux 2.6.32.24              y       y         y         n
Red Hat Enterprise Linux 6                 y       y         y         n
CLE hopper.nersc.gov                       n       n         n         n
CLE franklin.nersc.gov                     n       n         n         n

           (1) Fortran compiled with gfortran.
           (2) With PGI and Absoft compilers.
           (3) With PGI compiler for Fortran.
           (4) Using Visual Studio 2008 w/ Intel Fortran 10.1 (Cygwin shared libraries are not supported)
           (5) C and C++ shared libraries will not be built when Fortran is enabled.
    Compiler versions for each platform are listed in the preceding
    "Platforms Tested" table.


Known Problems
==============

* The STDIO VFD does not work on some architectures, possibly due to 32/64
  bit or large file issues.  The basic STDIO VFD test is known to fail on
  64-bit SunOS 5.10 on SPARC when built with -m64 and 32-bit OS X/Darwin
  10.7.0.  The STDIO VFD test has been disabled while we investigate and
  a fix should appear in a future release, possibly 1.8.9.
  (DER - 2011/10/14)

* h5diff can report inconsistent results when comparing datasets of enum type
  that contain invalid values.  This is due to how enum types are handled in
  the library and will be addressed in the next release.
  (DER - 2011/10/14 - HDFFV-7527)

* The links test can fail under the stdio VFD due to some issues with external
  links.  This will be investigated and fixed in a future release.
  (DER - 2011/10/14 - HDFFV-7768)

* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 - HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value. (AKC - 2011/05/07)

* The C++ and FORTRAN bindings are not currently working on FreeBSD.
  (QAK - 2011/04/26)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. We are looking into the issue. HL and C++ shared libraries
  should now be working as intended, however. (MAM - 2011/04/20)

* The --with-mpe configure option does not work with Mpich2. (AKC - 2011/03/10)

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
  (NAF - 2011/01/19)

* The library's test dt_arith.c showed a compiler's rounding problem on
  Cygwin when converting from unsigned long long to long double.  The
  library's own conversion works fine.  We defined a macro for Cygwin to
  skip this test until we can solve the problem.
  (SLU - 2010/05/05 - HDFFV-1264)

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  (SLU - 2010/02/02)

* MinGW has a missing libstdc++.dll.a library file and will not successfully link
  C++ applications/tests. Do not use the enable-cxx configure option. Read all of
  the INSTALL_MINGW.txt file for all restrictions. (ADB - 2009/11/11)

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.
  (MAM - 2009/11/04)

* The PathScale MPI implementation, accessing a Panasas file system, would
  cause H5Fcreate() with H5F_ACC_EXCL to fail even when the file does not
  exist. This is due to the MPI_File_open() call failing if the mode has
  the MPI_MODE_EXCL bit set. (AKC - 2009/08/11 - HDFFV-988)

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO. (CMC - 2009/04/28)

* For Red Storm, a Cray XT3 system, the tools/h5ls/testh5ls.sh and
  tools/h5copy/testh5copy.sh will fail some of its sub-tests. These sub-tests
  are expected to fail and should exit with a non-zero code but the yod
  command does not propagate the exit code of the executables. Yod always
  returns 0 if it can launch the executable.  The test suite shell expects
  a non-zero for this particular test, therefore it concludes the test has
  failed when it receives 0 from yod.  Skip all the "failing" test for now
  by changing them as following.

  ======== Original tools/h5ls/testh5ls.sh =========
  TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ======== Change to ===============================
  echo SKIP TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ==================================================

  ======== Original tools/h5copy/testh5copy.sh =========
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  H5LSTEST $FILEOUT
  ======== Change to ===============================
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  echo SKIP H5LSTEST $FILEOUT
  ==================================================
  (AKC - 2008/11/10)

* For Red Storm, a Cray XT3 system, the yod command sometimes gives the
  message,  "yod allocation delayed for node recovery".  This interferes with
  test suites that do not expect to see this message.  See the section of "Red
  Storm" in file INSTALL_parallel for a way to deal with this problem.
  (AKC - 2008/05/28)

* On an Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* On mpich 1.2.5 and 1.2.6, if more than two processes contribute no IO and
  the application asks to do collective IO, we have found that when using 4
  processors, a simple collective write will sometimes be hung. This can be
  verified with t_mpi test under testpar.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  (SLU - 2005/06/30)

* On IBM AIX systems, parallel HDF5 mode will fail some tests with error
  messages like "INFO: 0031-XXX ...".  This is from the command `poe'.
  Set the environment variable MP_INFOLEVEL to 0 to minimize the messages
  and run the tests again.

  The tests may fail with messages like "The socket name is already in use",
  but HDF5 does not use sockets.  This failure is due to problems with the
  poe command trying to set up the debug socket.  To resolve this problem,
  check to see whether there are many old /tmp/s.pedb.* files staying around.
  These are sockets used by the poe command and left behind due to failed
  commands.  First, ask your system administrator to clean them out.
  Lastly, request IBM to provide a means to run poe without the debug socket.
  (AKC - 2004/12/08)


%%%%1.8.7%%%%


HDF5 version 1.8.7 released on Tue May 10 09:24:44 CDT 2011
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.6 and
HDF5 1.8.7, and contains information on the platforms tested and
known problems in HDF5-1.8.7.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.7 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.7 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.7 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.7 (current
release) versus Release 1.8.6":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.6
- Platforms Tested
- Supported Configuration Features Summary
- Known Problems


New Features
============

    Configuration
    -------------
    - Configure now generates Makefiles that build in "silent make mode"
      by default in which compile and link lines are significantly
      simplified for clarity. To override this and view actual compile and
      link lines during building, the --disable-silent-rules flag can be used
      at configure time, or the 'make' command can be followed by V=1, to
      indicate a "verbose" make. (MAM - 2011/4/14).
    - Added mpicc and mpif90 as the default C and Fortran compilers for Linux
      systems when --enable-parallel is specified but no $CC or $FC is defined.
      (AKC - 2011/2/7)
    - Added a new configure option, "--enable-unsupported", which can
      be used to stop configure from preventing the use of unsupported
      configure option combinations, such as c++ in parallel or Fortran
      with threadsafe. Use at your own risk, as it may result in a
      library that won't compile or run as expected!
      (MAM - 2010/11/17 - Bug 2061)

    Library
    -------
    - The library allows the dimension size of a dataspace to be zero.  In
      the past, the library would allow this only if the maximal dimension
      size was unlimited. Now there is no such restriction, but no data
      can be written to this kind of dataset. (SLU - 2011/4/20)
    - We added two new macros, H5_VERSION_GE and H5_VERSION_LE, to let users
      compare certain version numbers with the library being used. (SLU -
      2011/4/20)
    - Added ability to cache files opened through external links.  Added new
      public functions H5Pset_elink_file_cache_size(),
      H5Pget_elink_file_cache_size(), and H5Fclear_elink_file_cache().
      (NAF - 2011/02/17)
    - Finished implementing all options for 'log' VFD.  (QAK - 2011/1/25)
    - Removed all old code for Metrowerks compilers, bracketed by
      __MWERKS__). Metrowerks compiler is long gone. (AKC - 2010/11/17)

    Parallel Library
    ----------------
    - None

    Tools
    -----
     - h5diff: Added new "verbose with levels" option, '-vN, --verbose=N'.
       The old '-v, --verbose' option is deprecated but remains available;
       it is exactly equivalent to '-v0, --verbose=0'.
       The new levels 1 ('-v1' or '--verbose=1') and 2 ('-v2' or
       '--verbose=2') can be specified to view more information regarding
       attributes differences.  Bug #2121 (JKM 2011/3/23)
     - h5dump: Added new option --enable-error-stack. This option will
       display error stack information in the output stream. This is
       useful when the "h5dump: Unable to print data" message is output.
       (ADB - 2011/03/03)

    High-Level APIs
    ---------------
    - Fortran LT make datasets routines (H5LTmake_dataset_f,
      h5ltmake_dataset_int_f, h5ltmake_dataset_float_f, h5ltmake_dataset_double_f)
      and LT read datasets routines (h5ltread_dataset_f,h5ltread_dataset_int_f,
      h5ltread_dataset_float_f, 5ltread_dataset_double_f) can now handle
      4-dimensional to 7-dimensional rank datasets. HDFFV-1217 (MSB-2011/4/24/2011)

    F90 API
    -------
     - None

    C++ API
    -------
    - None


Support for New Platforms, Languages, and Compilers
===================================================
    - Intel V11.1 uses now -O3 optimization in production mode (EIP - 2010/10/08)



Bug Fixes since HDF5-1.8.6
==========================

    Configuration
    -------------
    - Shared C++ and HL libraries on AIX should now be working correctly.
      Note that Fortran shared libraries are still not working on AIX.
      (See the Known Problems section, below). (MAM - 2011/4/20)
    - Removed config/ibm-aix6.x. All IBM-AIX settings are in one file,
      ibm-aix. (AKC - 2011/4/14)
    - Shared C libraries are no longer disabled on Mac when Fortran
      is enabled. Shared Fortran libraries are still not supported on Mac,
      so configure will disable them by default, but this is overridable
      with the new --enable-unsupported configure option. The configure
      summary has been updated to reflect the fact that the shared-ness of
      the C++/Fortran wrapper libraries may not align with the C library.
      (MAM - 2011/04/11 - HDFFV-4353).

    Library
    -------
    - Changed assertion failure when decoding a compound datatype with no
      fields into a normal error failure.  Also prohibit using this sort
      of datatype for creating an attribute (as is already the case for
      datasets and committed (named) datatypes).  (QAK - 2011/04/15, Jira
      issue #HDFFV-2766)
    - Tell the VFL flush call that the file will be closing, allowing
      the VFDs to avoid sync'ing the file (particularly valuable in parallel).
      (QAK - 2011/03/09)
    - The datatype handler created with H5Tencode/decode used to have the
      reference count 0 (zero); it now has the reference count 1 (one).
      (SLU - 2011/2/18)
    - Fixed the definition of H5_HAVE_GETTIMEOFDAY on Windows so that
      HDgettimeofday() is defined and works properly.  Bug HDFFV-5931
      (DER - 2011/04/14)
    - Added basic VFD tests for the Windows, STDIO and log VFD tests.
      (DER - 2011/04/11)

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - Updated h5dump test case script to prevent entire test failure when
      source directory is read-only. Bug #HDFFV-4342 (JKM 2011/4/12)
    - Fixed h5dump displaying incorrect values for H5T_STD_I8BE type data in
      attribute on Big-Endian machine. H5T_STD_I8BE is unsigned 8bit type,
      so h5dump is supposed to display -2 instead of 254. It worked correctly
      on Little-Endian system , but not on Big-Endian system.  Bug #HDFFV-4358
      (JKM 04/08/2011)
    - Updated some HDF5 tools to standardize the option name as
      '--enable-error-stack' for printing HDF5 error stack messages. h5ls and
      h5dump have been updated. For h5ls, this replaces "-e/--errors" option,
      which is deprecated. For h5dump, this is a new option. Bug #2182
      (JKM 2011/3/30)
    - Fixed the h5diff --use-system-epsilon option. The formula used in the
      calculation was changed from ( |a - b| / b ) to ( |a - b| ).
      This was done to improve performance. Bug #2184 (JKM 2011/3/24)
    - Fixed output for H5T_REFERENCE in h5dump. According to the BNF document
      the output of a H5T_REFERENCE should be followed by the type;
      <reference> ::= H5T_REFERENCE { <ref_type> }
      <ref_type> ::= H5T_STD_REF_OBJECT | H5T_STD_REF_DSETREG
      Previously this was only displayed if the -R option was used.
      Bug #1725 (ADB 2011/3/28)
    - Fixed two h5diff issues. 1) h5diff compared attributes correctly only
      when two objects had the same number of attributes and the attribute
      names were identical. 2) h5diff did not display useful information about
      attribute differences. Bug #2121 (JKM 2011/3/17)
    - Fixed a memory leak in h5diff that occurred when accessing symbolic links
      with the --follow-symlink option. Bug #2214  (JKM 2011/3/18)
    - Fixed a memory leak in h5diff that occurred when accessing variable length
      string data. Bug #2216 (JKM 2011/3/18)
    - Fixed and improved the help page for h5ls -a, --address option.
      Bug #1904 (JKM 2011/3/11)
    - Fixed h5copy to enable copying an object into the same HDF5 file.
      Previously h5copy displayed an error message when the target file
      was the same as the source file. (XCAO 2011/3/8)
    - Fixed an h5dump problem that caused the tool to skip some data elements
      in large datasets with a large array datatype on Windows. This issue
      arose only on Windows due to the different return behavior of the
      _vsnprintf() function.  Bug #2161 (JKM 2011/3/3)
    - Fixed h5dump which was skipping some array indices in large datasets
      with a relatively large array datatype. The interval of skipped indices
      varied according to the size of the array. Bug #2092 (JKM 2011/2/15)
    - Fixed h5diff which was segfaulting when comparing compound datasets
      with a combination of fixed-length string datatypes and variable-length
      string datatypes in certain orders. Bug #2089 (JKM 2010/12/28)
    - Improved h5diff performance. 1) Now use HDmemcmp() before comparing two
      elements. 2) Replace expensive H5Tequals() calls. 3) Retrieve datatype
      information at dataset level, not at each element level for compound
      datasets. HDFFV-7516 (JKM 2011/4/18)
    - Fixed h5ls to display nested compound types with curly brackets
      when -S (--simple) option is used with -l (--label), so it shows
      which members (in curly brackets) belong to which nested compound type,
      making the output clearer.  Bug #1979 (JKM 2010/11/09)
    - Fixed h5diff to handle variable-length strings in a compound dataset
      and variable-length string arrays in a compound dataset correctly.
      Garbage values were previously displayed when h5diff compared multiple
      variable-length strings in a compound type dataset.
      Bug #1989 (JKM 2010/10/28)
    - Fixed h5copy to fail gracefully when copying an object to a non-
      existing group without the -p option. Bug #2040 (JKM 2010/10/18)

    F90 API
    ------
    - None

    C++ API
    ------
    - None

    High-Level APIs:
    ------
    - None

    Fortran High-Level APIs:
    ------
    -  h5tbmake_table_f: Fixed error in passing an array of characters with different
       length field names.
    -  h5tget_field_info_f: Fixed error with packing the C strings into a Fortran
       array of strings. Added optional argument called 'maxlen_out' which returns
       the maximum string character length in a field name element.
       Bug HDFFV-1255 (MSB- 4/17/2011)




Platforms Tested
================
The following platforms and compilers have been tested for this release.

    AIX 6.1                       xlc 11.1.0.3
    (NCSA BP)                     xlC 11.1.0.3
                                  xlf90 13.1.0.3
                                  mpcc_r 11.1.0.3
                                  mpxlf90_r 13.1.0.3

    FreeBSD 8.2-STABLE i386       gcc 4.2.1 [FreeBSD] 20070719
    (loyalty)                     g++ 4.2.1 [FreeBSD] 20070719
                                  gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    FreeBSD 8.2-STABLE amd64      gcc 4.2.1 [FreeBSD] 20070719
    (freedom)                     g++ 4.2.1 [FreeBSD] 20070719
                                  gcc 4.6.1 20110422
                                  g++ 4.6.1 20110422
                                  gfortran 4.6.1 20110422

    Linux 2.6.18-194.3.1.el5PAE   gcc (GCC) 4.1.2 and 4.4.2
    #1 SMP i686 i686 i386         G95 (GCC 4.0.3 (g95 0.93!) Apr 21 2010)
    (jam)                         GNU Fortran (GCC) 4.1.2 20080704
                                      (Red Hat 4.1.2-48) and 4.4.2
                                  PGI C, Fortran, C++ 10.4-0 32-bit
                                  PGI C, Fortran, C++ 10.6-0 32-bit
                                  Intel(R) C Compiler for 32-bit
                                      applications, Version 11.1
                                  Intel(R) C++ Compiler for 32-bit
                                      applications, Version 11.1
                                  Intel(R) Fortran Compiler for 32-bit
                                      applications, Version 11.1
                                  Absoft 32-bit Fortran 95 10.0.7
                                  MPICH mpich2-1.3.1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    Linux 2.6.18-194.17.1.el5     gcc 4.1.2 and 4.4.2
    #1 SMP x86_64 GNU/Linux       G95 (GCC 4.0.3 (g95 0.93!) Apr 21 2010)
    (amani)                           tested for both 32- and 64-bit binaries
                                  GNU Fortran (GCC) 4.1.2 20080704
                                      (Red Hat 4.1.2-46) and 4.4.2
                                  Intel(R) C, C++, Fortran Compilers for
                                      applications running on Intel(R) 64,
                                      Version 11.1.
                                  PGI C, Fortran, C++ Version 9.0-4
                                      for 64-bit target on x86-64
                                  MPICH mpich2-1.3.1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    SGI ProPack 7 Linux           Intel(R) C++ Version 11.1 20100806
    2.6.32.24-0.2.1.2230.2.PTF-   Intel(R) Fortran Version 11.1 20100806
    default #1 SMP                SGI MPT 2.01
    SGI Altix UV
    (NCSA ember)

    SunOS 5.10 32- and 64-bit     Sun C 5.9 Sun OS_sparc Patch 124867-16
    (linew)                       Sun Fortran 95 8.3 Sun OS_sparc Patch 127000-13
                                  Sun C++ 5.9 Sun OS_sparc Patch 124863-26
                                  Sun C 5.10 SunOS_sparc Patch 141861-07
                                  Sun Fortran 95 8.4 SunOS_sparc Patch 128231-06
                                  Sun C++ 5.10 SunOS_sparc 128228-11

    Intel Xeon Linux 2.6.18-      gcc 4.2.4
    92.1.10.el5_lustre.1.6.6smp-  Intel(R) C++ Version 10.1.017
    perfctr #8 SMP                Intel(R) Fortran Compiler Version 10.1.017
    (NCSA abe)                    Open MPI 1.3.2
                                  MVAPICH2-1.5.1_pgi-10.8

    Windows XP                    Visual Studio 2008 w/ Intel Fortran 10.1 (project files)
                                  Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 (cmake)
                                  Cygwin(1.7.7 native gcc(4.3.4) compiler and gfortran)

    Windows XP x64                Visual Studio 2008 w/ Intel Fortran 10.1 (project files)
                                  Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 (cmake)
                                  Cygwin(1.7.7 native gcc(4.3.4) compiler and gfortran)

    Windows Vista                 Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Windows Vista x64             Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Windows 7                     Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Windows 7 x64                 Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Mac OS X 10.7.0 (Intel 64-bit) i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1
    Darwin Kernel Version 10.7.0  GNU Fortran (GCC) 4.6.0 20101106 (experimental)
                                  Intel C, C++ and Fortran compilers 12.0.1.122 20101110

    Mac OS X 10.7.0 (Intel 32-bit) i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3)
    Darwin Kernel Version 10.7.0  GNU Fortran (GCC) version 4.4.0 20090123 (experimental)
                            [trunk revision 143587]

    Fedora 12 2.6.32.16-150.fc12.ppc64 #1 SMP ppc64 GNU/Linux
                                  gcc (GCC) 4.4.4 20100630 (Red Hat 4.4.4-10)
                                  GNU Fortran (GCC) 4.4.4 20100630 (Red Hat 4.4.4-10)

    Debian6.01 2.6.32-5-686 #1 SMP i686 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5

    Debian6.01 2.6.32-5-amd64 #1 SMP x86_64 GNU/Linux
                                  gcc (Debian 4.4.5-8) 4.4.5
                                  GNU Fortran (Debian 4.4.5-8) 4.4.5

    Fedora14 2.6.35.12-88.fc14.i686.PAE #1 SMP i686 i686 i386 GNU/Linux
                                  gcc (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)
                                  GNU Fortran (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)

    Fedora14 2.6.35.12-88.fc14.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)
                                  GNU Fortran (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)

    SUSE 11.4 2.6.37.1-1.2-desktop #1 SMP PREEMPT i686 i686 i386 GNU/Linux
                                  gcc (SUSE Linux) 4.5.1 20101208
                                  GNU Fortran (SUSE Linux) 4.5.1 20101208

    SUSE 11.4 2.6.37.1-1.2-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.5.1 20101208
                                  GNU Fortran (SUSE Linux) 4.5.1 20101208

    Ubuntu 10.10 2.6.35-28-generic #50-Ubuntu SMP i686 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
                                  GNU Fortran (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5

    Ubuntu 10.10 2.6.35-28-generic #50-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
                                  GNU Fortran (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5

    OpenVMS Alpha 8.3             HP C V7.3-009
                                  HP Fortran V8.2-104679-48H9K
                                  HP C++ V7.3-009

Tested Configuration Features Summary
========================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                                 C        F90    F90      C++   zlib  SZIP
                                         parallel        parallel
Solaris2.10 32-bit                         n        y      n        y     y     y
Solaris2.10 64-bit                         n        y      n        y     y     y
Windows XP                                 n        y(4)   n        y     y     y
Windows XP x64                             n        y(4)   n        y     y     y
Windows Vista                              n        y(4)   n        y     y     y
Windows Vista x64                          n        y(4)   n        y     y     y
OpenVMS Alpha                              n        y      n        y     y     n
Mac OS X 10.7 Intel 32-bit                 n        y      n        y     y     y
Mac OS X 10.7 Intel 64-bit                 n        y      n        y     y     y
AIX 6.1 32- and 64-bit                     y        y      y        y     y     y
FreeBSD 8.2-STABLE 32&64 bit               n        x      n        x     y     y
CentOS 5.5 Linux 2.6.18-194 i686 GNU (1)W  y        y(2)   y        y     y     y
CentOS 5.5 Linux 2.6.18-194 i686 Intel  W  n        y      n        y     y     n
CentOS 5.5 Linux 2.6.18-194 i686 PGI    W  n        y      n        y     y     n
CentOS 5.5 Linux 2.6.16 x86_64 GNU (1)  W  y        y(3)   y        y     y     y
CentOS 5.5 Linux 2.6.16 x86_64 Intel    W  n        y      n        y     y     n
CentOS 5.5 Linux 2.6.16 x86_64 PGI      W  n        y      n        y     y     y
RedHat EL4 2.6.18 Xeon Lustre           C  y        y      y        y     y     n
Fedora 12 Linux 2.6.32.16-150.fc12.ppc64   n        y      n        y     y     y
SGI Linux 2.6.32.19                        y        y      y        y     y     y


Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
Solaris2.10 32-bit                         y       y         y         y
Solaris2.10 64-bit                         y       y         y         y
Windows XP                                 y       y(4)      y         n
Windows XP x64                             y       y(4)      y         n
Windows Vista                              y       y(4)      y         y
Windows Vista x64                          y       y(4)      y         y
OpenVMS Alpha                              n       n         n         n
Mac OS X 10.7 Intel 32-bit                 y(5)    n         y         n
Mac OS X 10.7 Intel 64-bit                 y(5)    n         y         n
AIX 6.1 32- and 64-bit                     n       n         n         y
FreeBSD 8.2-STABLE 32&64 bit               y       x         x         y
CentOS 5.5 Linux 2.6.18-128 i686 GNU (1)W  y       y(2)      y         y
CentOS 5.5 Linux 2.6.18-128 i686 Intel  W  y       y         y         n
CentOS 5.5 Linux 2.6.18-128 i686 PGI    W  y       y         y         n
CentOS 5.5 Linux 2.6.16 x86_64 GNU (1)  W  y       y         y         y
CentOS 5.5 Linux 2.6.16 x86_64 Intel    W  y       y         y         n
CentOS 5.5 Linux 2.6.16 x86_64 PGI      W  y       y         y         n
RedHat EL4 2.6.18 Xeon Lustre           C  y       y         y         n
Fedora 12 Linux 2.6.32.16-150.fc12.ppc64   y       y         y         y
SGI Linux 2.6.32.19                        y       y         y         y

           (1) Fortran compiled with gfortran.
           (2) With PGI and Absoft compilers.
           (3) With PGI compiler for Fortran.
           (4) Using Visual Studio 2008 w/ Intel Fortran 10.1 (Cygwin shared libraries are not supported)
           (5) C and C++ shared libraries will not be built when Fortran is enabled.
    Compiler versions for each platform are listed in the preceding
    "Platforms Tested" table.


Known Problems
==============
* After the shared library support was fixed for some bugs, it was discovered
  that "make prefix=XXX install" no longer works for shared libraries. It
  still works correctly for static libraries. Therefore, if you want to
  install the HDF5 shared libraries in a location such as /usr/local/hdf5,
  you need to specify the location via the --prefix option during configure
  time. E.g, ./configure --prefix=/usr/local/hdf5 ...
  (AKC - 2011/05/07 HDFFV-7583)

* The parallel test, t_shapesame, in testpar/, may run for a long time and may
  be terminated by the alarm signal.  If that happens, one can increase the
  alarm seconds (default is 1200 seconds = 20 minutes) by setting the
  environment variable, $HDF5_ALARM_SECONDS, to a larger value such as 3600
  (60 minutes).  Note that the t_shapesame test may fail in some systems
  (see the "While working on the 1.8.6 release..." problem below).  If
  it does, it will waste more time if $HDF5_ALARM_SECONDS is set
  to a larger value. (AKC - 2011/05/07)

* The C++ and FORTRAN bindings are not currently working on FreeBSD.
  (QAK - 2011/04/26)

* Shared Fortran libraries are not quite working on AIX. While they are
  generated when --enable-shared is specified, the fortran and hl/fortran
  tests fail. We are looking into the issue. HL and C++ shared libraries
  should now be working as intended, however. (MAM - 2011/04/20)

* The --with-mpe configure option does not work with Mpich2. AKC - 2011/03/10

* If parallel gmake (e.g., gmake -j 4) is used, the "gmake clean" command
  sometimes fails in the perform directory due to the attempt to remove the
  executable of h5perf or h5perf_serial by two "parallel" commands. This error
  has no consequence on the functionality of the HDF5 library or install. It
  is fixed in the next release. AKC - 2011/01/25

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or file systems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/

* The library's test dt_arith.c showed a compiler's rounding problem on
  Cygwin when converting from unsigned long long to long double.  The
  library's own conversion works fine.  We defined a macro for Cygwin to
  skip this test until we can solve the problem.  Please see bug #1813.
  SLU - 2010/5/5

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added in.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug in 1.8 library.  Because there's only one user
  complaining about it, we (Elena, Quincey, and I) decided to leave it as
  it is (see bug report #1279).  Quincey will make a plan for 1.10.
  SLU - 2010/2/2

* MinGW has a missing libstdc++.dll.a library file and will not successfully link
  C++ applications/tests. Do not use the enable-cxx configure option. Read all of
  the INSTALL_MINGW.txt file for all restrictions. ADB - 2009/11/11

* The PathScale MPI implementation, accessing a Panasas file system, would
  cause H5Fcreate() with H5F_ACC_EXCL to fail even when the file does not
  exist. This is due to the MPI_File_open() call failing if the mode has
  the MPI_MODE_EXCL bit set. (See bug 1468 for details.) AKC - 2009/8/11

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO. CMC - 2009/04/28

* For Red Storm, a Cray XT3 system, the tools/h5ls/testh5ls.sh and
  tools/h5copy/testh5copy.sh will fail some of its sub-tests. These sub-tests
  are expected to fail and should exit with a non-zero code but the yod
  command does not propagate the exit code of the executables. Yod always
  returns 0 if it can launch the executable.  The test suite shell expects
  a non-zero for this particular test, therefore it concludes the test has
  failed when it receives 0 from yod.  Skip all the "failing" test for now
  by changing them as following.

  ======== Original tools/h5ls/testh5ls.sh =========
  TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ======== Change to ===============================
  echo SKIP TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ==================================================

  ======== Original tools/h5copy/testh5copy.sh =========
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  H5LSTEST $FILEOUT
  ======== Change to ===============================
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  echo SKIP H5LSTEST $FILEOUT
  ==================================================
  AKC - 2008/11/10

* For Red Storm, a Cray XT3 system, the yod command sometimes gives the
  message,  "yod allocation delayed for node recovery".  This interferes with
  test suites that do not expect to see this message.  See the section of "Red
  Storm" in file INSTALL_parallel for a way to deal with this problem.
  AKC - 2008/05/28

* On an Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* On mpich 1.2.5 and 1.2.6, if more than two processes contribute no IO and
  the application asks to do collective IO, we have found that when using 4
  processors, a simple collective write will sometimes be hung. This can be
  verified with t_mpi test under testpar.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  SLU - 2005/6/30

* On IBM AIX systems, parallel HDF5 mode will fail some tests with error
  messages like "INFO: 0031-XXX ...".  This is from the command `poe'.
  Set the environment variable MP_INFOLEVEL to 0 to minimize the messages
  and run the tests again.

  The tests may fail with messages like "The socket name is already in use",
  but HDF5 does not use sockets.  This failure is due to problems with the
  poe command trying to set up the debug socket.  To resolve this problem,
  check to see whether there are many old /tmp/s.pedb.* files staying around.
  These are sockets used by the poe command and left behind due to failed
  commands.  First, ask your system administrator to clean them out.
  Lastly, request IBM to provide a means to run poe without the debug socket.

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.

* There is also a configure error on Altix machines that incorrectly reports
  when a version of Szip without an encoder is being used.

* On cobalt, an SGI Altix SMP ia64 system, Intel compiler version 10.1 (which
  is the default on that system) does not work properly and results in
  failures during make check (in a static build) and make installcheck (during
  a shared build). This appears to be a compiler optimization problem.
  Reducing optimization by setting CFLAGS to -O1 or below resolves the issue.
  Alternatively, using a newer version of the compiler (11.0) also works as
  intended. MAM - 2010/06/01

* h5diff will not report enum value differences when one or both of the values
  is not a valid enumeration value.  The source of this bug has been identified
  and it will be fixed in 1.8.8. DER - 2011/04/27


%%%%1.8.6%%%%


HDF5 version 1.8.6 released on Mon Feb 14 10:26:30 CST 2011
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.5 and
HDF5 1.8.6, and contains information on the platforms tested and
known problems in HDF5-1.8.6.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.6 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.6 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.6 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.6 (current
release) versus Release 1.8.5":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.5
- Platforms Tested
- Supported Configuration Features Summary
- Known Problems


New Features
============

    Configuration
    -------------
    - CMake: Improved CPack packaging, added parallel commands, improved
      configuration options (better similarity to configure), added more
      tests, better support for use in external cmake projects.
      (ADB - 2010/10/07)
    - The default configuration setting for official releases is
      --enable-production. For unofficial releases, the default configuration
      setting has been --disable-production. (AKC  - 2010/05/28)
    Library
    -------
    - Added support for thread safety on Windows using the Windows threads
      library. Use the HDF5_ENABLE_THREADSAFE option in CMake on a Windows
      platform to enable this functionality. This is supported on Windows
      Vista and newer Windows operating systems. (MAM - 2010/09/10)
    - H5Tset_order and H5Tget_order now support all datatypes.  A new byte
      order, H5T_ORDER_MIXED, has been added specifically for a compound
      datatype and its derived type.  (SLU - 2010/8/23)
    - Improved performance of metadata I/O by changing the default algorithm
      to perform I/O from all processes (instead of just process 0) when using
      parallel I/O drivers. (QAK - 2010/07/19)
    - Improved performance of I/O on datasets with the same shape, but
      different rank. (QAK - 2010/07/19)
    - Improved performance of the chunk cache by avoiding unnecessary b-tree
      lookups of chunks already in cache. (NAF - 2010/06/15)

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - h5diff: Added a new flag: --exclude-path.  The specified path to an
      object will be excluded when comparing two files or two groups. If a
      group is specified to be excluded, all member objects of that group
      will be excluded.  (JKM - 2010/09/16).
    - h5ls: Added a new flag: --no-dangling-links.  See --help output for
      details. (JKM - 2010/06/15)
    - h5ls: Added a new flag --follow-symlinks.  See --help output for
      details. (JKM - 2010/05/25)

    High-Level APIs
    ---------------
    - None

    F90 API
    -------
     - None

    C++ API
    -------
    - None


Support for New Platforms, Languages, and Compilers
===================================================
    - Sun C and C++ 5.10 and Sun Fortran 95 8.4.
    - Mac OS X 10.6.4 with gcc 4.2.1 and gfortran 4.6


Bug Fixes since HDF5-1.8.5
==========================

    Configuration
    -------------
    - The default number of MPI processes for testing purposes has been
      changed from 3 to 6.  (AKC - 2010/11/11)
    - Some tests in tools/h5repack may fail in AIX systems when -q32 mode is
      used. The error is caused by not requesting enough memory in default.
      Added "env LDR_CNTRL=MAXDATA=0x20000000@DSA" into the $RUNSERIAL and
      $RUNPARALLE in the AIX config file so that executables are tested with
      more memory.  (AKC - 2010/11/11)
    - Removed recognition of the parallel compilers of LAM(hcc) and
      ChMPIon(cmpicc) since we have no access to these two MPI implementations
      and cannot verify their correctness. (AKC - 2010/07/14 - Bug 1921)
    - PHDF5 was changed to use "mpiexec" instead of mpirun as the default
      MPI applications startup command as defined in the MPI-2 definition,
      section 4.1. (AKC - 2010/06/11 - Bug 1921)

    Library
    -------
    - Fixed a bug that caused big endian machines to generate corrupt files
      when using the scale-offset filter with floating point data or fill
      values.  Note that such datasets will no longer be readable by any
      by any machine after this patch.  (NAF - 2010/02/02 - Bug 2131)
    - Retrieving a link's name by index in the case where the link is external
      and the file that the link refers to doesn't exist will now fail
      gracefully rather than cause a segmentation fault. (MAM - 2010/11/17)
    - Modified metadata accumulator to better track accumulated dirty metadata
      in an effort to reduce unnecessary I/O in certain situations and to
      fix some other corner cases which were prone to error. (MAM - 2010/10/15)
    - Added a new set of unit tests that are run during 'make check' to verify
      the behavior of the metadata accumulator. (MAM - 2010/10/15)
    - Modified library to always cache symbol table information.  Libraries
      from version 1.6.3 and earlier have a bug which causes them to require
      this information for some operations. (NAF - 2010/09/21 - Bug 1864)
    - Fixed a bug where the library could generate an assertion/core dump when
      a file that had been created with H5Pset_libver_bounds(fapl,
      H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) but didn't have a superblock
      extension was later reopened.  (QAK - 2010/09/16 - Bug 1968)
    - Fixed a bug that could occur when getting information for a new-style
      group that was previously opened through a file handle that was later
      closed. (NAF - 2010/09/15)
    - Added define check in H5public.h if stdint.h is supported by the C++
      compiler. This define is only available on Windows with VS2010 and using
      CMake to build the library. (ADB - 2010/09/13 - Bug 1938)
    - When a mandatory filter failed to write data chunks, the dataset
      couldn't close (bug 1260).  The fix releases all resources and closes
      the dataset but returns a failure. (SLU - 2010/09/08)
    - H5Eset_current_stack now also closes the error stack set as the
      default. This is to avoid a potential problem.
      (SLU - 2010/09/07 - Bug 1799)
    - Corrected situation where 1-D chunked dataset could get created by an
      application without calling H5Pset_chunk().  H5Pset_chunk is now
      required for creating all chunked datasets.  (QAK - 2010/09/02)
    - Fixed many memory issues that valgrind exposed.  (QAK - 2010/08/24)
    - Fixed the bug in the filter's public CAN_APPLY function.  The return
      value should be htri_t not herr_t. (SLU - 2010/08/05 - Bug 1239)
    - Fixed the STDIO VFD to use fseeko64 instead of fseek64 for 64-bit I/O
      support. (AKC - 2010/7/30)
    - Fixed a bug in the direct I/O driver that could render files with certain
      kinds of unaligned data unreadable or corrupt them. (NAF - 2010/07/28)
    - valgrind reported an error of copying data to itself when a new attribute
      is written.  Fixed by taking out the memcpy step in the attribute code.
      (SLU - 2010/07/28 - Bug 1956)
    - Corrected various issues in the MPI datatype creation code which could
      cause resource leaks or incorrect behavior (and may improve the
      performance as well).  (QAK - 2010/07/19)
    - Fixed a bug that could cause file corruption when using non-default sizes
      of addresses and/or lengths.  This bug could also cause uncorrupted files
      with this property to be unreadable.  This bug was introduced in 1.8.5.
      (NAF - 2010/07/16 - Bug 1951)

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - Fixed h5diff to compare member objects and groups recursively when
      two files or groups are compared. (JKM - 2010/9/16 - Bug 1975)
    - Fixed h5repack to be able to convert a dataset to COMPACT layout.
      (JKM - 2010/09/15 - Bug 1896)
    - Changed h5ls to not interpret special characters in object or attribute
      names for output. (JKM - 2010/06/28 - Bug 1784)
    - Revised the order of arguments for h5cc, h5fc, h5c++, h5pcc and h5pfc.
      CPPFLAGS, CFLAGS, LDFLAGS, and LIBS have been duplicated with an H5BLD_
      prefix to put the flags and paths from the hdf5 build in the correct
      places and allow the script user to add entries in CPPFLAGS, CFLAGS,
      LDFLAGS, and LIBS that will take precedence over those from the hdf5
      build. The user can make these entries persistent by editing
      CFLAGSBASE, CPPFLAGSBASE, LDFLAGSBASE, and LIBSBASE near the top of
      the script or temporary by setting HDF5_CFLAGS, HDF5_CPPFLAGS,
      HDF5_LDFLAGS, or HDF5_LIBS in the environment. The new order of
      arguments in these scripts is $CLINKER $H5BLD_CPPFLAGS $CPPFLAGS
      $H5BLD_CFLAGS $CFLAGS $LDFLAGS $clibpath $link_objs $LIBS $link_args
      $shared_link. (LRK - 2010/10/25 - Bug 1973)

    F90 API
    ------
    - None

    C++ API
    ------
    - None

    High-Level APIs:
    ------
    - None

    Fortran High-Level APIs:
    ------
    - None


Platforms Tested
================
The following platforms and compilers have been tested for this release.

    AIX 6.1                       xlc 11.1.0.3
    (NCSA BP)                     xlC 11.1.0.3
                                  xlf 13.1.0.3
                                  mpcc_r 11.1.0.3
                                  mpxlf_r 13.1.0.3

    FreeBSD 6.3-STABLE i386       gcc 3.4.6 [FreeBSD] 20060305
    (duty)                        g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.4.5 20100803
                                  g++ 4.4.5 20100803
                                  gfortran 4.4.5 20100803

    FreeBSD 6.3-STABLE amd64      gcc 3.4.6 [FreeBSD] 20060305
    (liberty)                     g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.4.5 20100803
                                  g++ 4.4.5 20100803
                                  gfortran 4.4.5 20100803

    Linux 2.6.18-194.3.1.el5PAE   gcc (GCC) 4.1.2 and 4.4.2
    #1 SMP i686 i686 i386         G95 (GCC 4.0.3 (g95 0.93!) Apr 21 2010)
    (jam)                         GNU Fortran (GCC) 4.1.2 20080704
                                      (Red Hat 4.1.2-48) and 4.4.2
                                  PGI C, Fortran, C++ 10.4-0 32-bit
                                  PGI C, Fortran, C++ 10.6-0 32-bit
                                  Intel(R) C Compiler for 32-bit
                                      applications, Version 11.1
                                  Intel(R) C++ Compiler for 32-bit
                                      applications, Version 11.1
                                  Intel(R) Fortran Compiler for 32-bit
                                      applications, Version 11.1
                                  Absoft 32-bit Fortran 95 10.0.7
                                  MPICH mpich2-1.3.1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    Linux 2.6.18-194.17.1.el5     gcc 4.1.2 and 4.4.2
    #1 SMP x86_64 GNU/Linux       G95 (GCC 4.0.3 (g95 0.93!) Apr 21 2010)
    (amani)                           tested for both 32- and 64-bit binaries
                                  GNU Fortran (GCC) 4.1.2 20080704
                                      (Red Hat 4.1.2-46) and 4.4.2
                                  Intel(R) C, C++, Fortran Compilers for
                                      applications running on Intel(R) 64,
                                      Version 11.1.
                                  PGI C, Fortran, C++ Version 9.0-4
                                      for 64-bit target on x86-64
                                  MPICH mpich2-1.3.1 compiled with
                                      gcc 4.1.2 and gfortran 4.1.2

    SGI ProPack 7 Linux           Intel(R) C++ Version 11.1 20100806
    2.6.32.19-0.3.1.1982.0.PTF-   Intel(R) Fortran Version 11.1 20100806
    default #1 SMP                SGI MPT 2.01
    SGI Altix UV
    (NCSA ember)

    SunOS 5.10 32- and 64-bit     Sun C 5.9 Sun OS_sparc Patch 124867-16
    (linew)                       Sun Fortran 95 8.3 Sun OS_sparc Patch 127000-13
                                  Sun C++ 5.9 Sun OS_sparc Patch 124863-62
                                  Sun C 5.10 SunOS_sparc Patch 141861-07
                                  Sun Fortran 95 8.4 SunOS_sparc Patch 128231-06
                                  Sun C++ 5.10 SunOS_sparc 128228-11

    Intel Xeon Linux 2.6.18-      gcc 4.2.4
    92.1.10.el5_lustre.1.6.6smp-  Intel(R) C++ Version 10.1.017
    perfctr #8 SMP                Intel(R) Fortran Compiler Version 10.1.017
    (NCSA abe)                    Open MPI 1.3.2
                                  MVAPICH2-1.5.1_pgi-10.8

    Windows XP                    Visual Studio 2008 w/ Intel Fortran 10.1 (project files)
                                  Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 (cmake)
                                  Cygwin(1.7.7 native gcc(4.3.4) compiler and gfortran)

    Windows XP x64                Visual Studio 2008 w/ Intel Fortran 10.1 (project files)
                                  Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)
                                  Visual Studio 2010 (cmake)
                                  Cygwin(1.7.7 native gcc(4.3.4) compiler and gfortran)

    Windows Vista                 Visual Studio 2008 w/ Intel Fortran 10.1 (project files)
                                  Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Windows Vista x64             Visual Studio 2008 w/ Intel Fortran 10.1 (project files)
                                  Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Windows 7                     Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Windows 7 x64                 Visual Studio 2008 w/ Intel Fortran 11.1 (cmake)

    Mac OS X 10.6.3 (Intel 64-bit) i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1
    Darwin Kernel Version 10.3.1  GNU Fortran (GCC) 4.5.0 20090910
                                  Intel C, C++ and Fortran compilers 11.1 20100806

    Mac OS X 10.6.4 (Intel 32-bit) i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1
    Darwin Kernel Version 10.4.0  GNU Fortran (GCC) 4.6.0 20101106
                                  Intel C, C++ and Fortran compilers 12.0.0 20101110

    Mac OS X 10.6.4 (Intel 64-bit) i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5659)
    Darwin Kernel Version 10.6.0   GNU Fortran (GCC) 4.5.0 20090910
                                   Intel C, C++ and Fortran compilers 11.1 20100806

    Fedora 12 2.6.32.16-150.fc12.ppc64 #1 SMP ppc64 GNU/Linux
                                  gcc (GCC) 4.4.4 20100630 (Red Hat 4.4.4-10)
                                  GNU Fortran (GCC) 4.4.4 20100630 (Red Hat 4.4.4-10)

    Debian5.06 2.6.26-2-686 #1 SMP i686 GNU/Linux
                                  gcc (Debian 4.3.2-1.1) 4.3.2
                                  GNU Fortran (Debian 4.3.2-1.1) 4.3.2

    Debian5.06 2.6.26-2-amd64 #1 SMP x86_64 GNU/Linux
                                  gcc (Debian 4.3.2-1.1) 4.3.2
                                  GNU Fortran (Debian 4.3.2-1.1) 4.3.2

    Fedora14 2.6.35.6-48.fc14.i686.PAE #1 SMP i686 i686 i386 GNU/Linux
                                  gcc (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)
                                  GNU Fortran (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)

    Fedora14 2.6.35.6-48.fc14.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)
                                  GNU Fortran (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4)

    SUSE 11.3 2.6.34.7-0.7-desktop #1 SMP PREEMPT i686 i686 i386 GNU/Linux
                                  gcc (SUSE Linux) 4.5.0 20100604 [gcc-4_5-branch revision 160292]
                                  GNU Fortran (SUSE Linux) 4.5.0 20100604 [gcc-4_5-branch revision 160292]

    SUSE 11.3 2.6.34.7-0.7-desktop #1 SMP PREEMPT x86_64 x86_64 x86_64 GNU/Linux
                                  gcc (SUSE Linux) 4.5.0 20100604 [gcc-4_5-branch revision 160292]
                                  GNU Fortran (SUSE Linux) 4.5.0 20100604 [gcc-4_5-branch revision 160292]

    Ubuntu 10.10 2.6.35-25-generic #44-Ubuntu SMP i686 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
                                  GNU Fortran (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5

    Ubuntu 10.10 2.6.35-25-generic #44-Ubuntu SMP x86_64 GNU/Linux
                                  gcc (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
                                  GNU Fortran (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5

    OpenVMS Alpha 8.3             HP C V7.3-009
                                  HP Fortran V8.2-104679-48H9K
                                  HP C++ V7.3-009

Tested Configuration Features Summary
========================================

    In the tables below
          y   = tested
          n   = not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                                 C        F90    F90      C++   zlib  SZIP
                                         parallel        parallel
Solaris2.10 32-bit                         n        y      n        y     y     y
Solaris2.10 64-bit                         n        y      n        y     y     y
Windows XP                                 n        y(4)   n        y     y     y
Windows XP x64                             n        y(4)   n        y     y     y
Windows Vista                              n        y(4)   n        y     y     y
Windows Vista x64                          n        y(4)   n        y     y     y
OpenVMS Alpha                              n        y      n        y     y     n
Mac OS X 10.6 Intel                        n        y      n        y     y     y
AIX 6.1 32- and 64-bit                     y        y      y        y     y     y
FreeBSD 6.3-STABLE 32&64 bit               n        y      n        y     y     y
CentOS 5.5 Linux 2.6.18-194 i686 GNU (1)W  y        y(2)   y        y     y     y
CentOS 5.5 Linux 2.6.18-194 i686 Intel  W  n        y      n        y     y     n
CentOS 5.5 Linux 2.6.18-194 i686 PGI    W  n        y      n        y     y     n
CentOS 5.5 Linux 2.6.16 x86_64 GNU (1)  W  y        y(3)   y        y     y     y
CentOS 5.5 Linux 2.6.16 x86_64 Intel    W  n        y      n        y     y     n
CentOS 5.5 Linux 2.6.16 x86_64 PGI      W  n        y      n        y     y     y
RedHat EL4 2.6.18 Xeon Lustre           C  y        y      y        y     y     n
Fedora 12 Linux 2.6.32.16-150.fc12.ppc64   n        y      n        y     y     y
SGI Linux 2.6.32.19                        y        y      y        y     y     y


Platform                                 Shared  Shared    Shared    Thread-
                                         C libs  F90 libs  C++ libs  safe
Solaris2.10 32-bit                         y       y         y         y
Solaris2.10 64-bit                         y       y         y         y
Windows XP                                 y       y(4)      y         n
Windows XP x64                             y       y(4)      y         n
Windows Vista                              y       y(4)      y         y
Windows Vista x64                          y       y(4)      y         y
OpenVMS Alpha                              n       n         n         n
Mac OS X 10.6                              y(5)    n         y         n
AIX 6.1 32- and 64-bit                     n       n         n         y
FreeBSD 6.3-STABLE 32&64 bit               y       n         y         y
CentOS 5.5 Linux 2.6.18-128 i686 GNU (1)W  y       y(2)      y         y
CentOS 5.5 Linux 2.6.18-128 i686 Intel  W  y       y         y         n
CentOS 5.5 Linux 2.6.18-128 i686 PGI    W  y       y         y         n
CentOS 5.5 Linux 2.6.16 x86_64 GNU (1)  W  y       y         y         y
CentOS 5.5 Linux 2.6.16 x86_64 Intel    W  y       y         y         n
CentOS 5.5 Linux 2.6.16 x86_64 PGI      W  y       y         y         n
RedHat EL4 2.6.18 Xeon Lustre           C  y       y         y         n
Fedora 12 Linux 2.6.32.16-150.fc12.ppc64   y       y         y         y
SGI Linux 2.6.32.19                        y       y         y         y

           (1) Fortran compiled with gfortran.
           (2) With PGI and Absoft compilers.
           (3) With PGI compiler for Fortran.
           (4) Using Visual Studio 2008 w/ Intel Fortran 10.1 (Cygwin shared libraries are not supported)
           (5) C and C++ shared libraries will not be built when Fortran is enabled.
    Compiler versions for each platform are listed in the preceding
    "Platforms Tested" table.


Known Problems
==============
* examples/run-all-ex.sh does not work on Cygwin. (NAF - 2011/02/11)

* Parallel test, t_shapesame in testpar, is rather unstable as it continues to
  have occasional errors in AIX and quite often in NCSA Abe. It is being built
  but it is not run automatically in the "make check" command. One would have to
  run it by hand to see if it works in a particular machine. AKC - 2011/01/28

* Although OpenVMS Alpha is supported, there are several problems with the C
  test suite - getname.c, lheap.c, lheap.c, mtime.c, and stab.c.  The test
  suite for h5diff also fails.  These failures are from the tests, not the
  library.  We have fixed these failures.  But it's too late to put the fixes
  into this release.  If you install the 1.8.6 library, it should still work
  despite of these test failures.  If you want the working copy without any
  test failure, you can request it from us.  SLU - 2011/01/26

* If parallel gmake (e.g., gmake -j 4) is used, the "gmake clean" command
  sometimes fails in the perform directory due to the attempt to remove the
  executable of h5perf or h5perf_serial by two "parallel" commands. This error
  has no consequence on the functionality of the HDF5 library or install. It
  is fixed in the next release. AKC - 2011/01/25

* While working on the 1.8.6 release of HDF5, a bug was discovered that can
  occur when reading from a dataset in parallel shortly after it has been
  written to collectively. The issue was exposed by a new test in the parallel
  HDF5 test suite, but had existed before that. We believe the problem lies with
  certain MPI implementations and/or filesystems.

  We have provided a pure MPI test program, as well as a standalone HDF5
  program, that can be used to determine if this is an issue on your system.
  They should be run across multiple nodes with a varying number of processes.
  These programs can be found at:
  http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/

* The h5diff tool can display garbage values when variable-length strings in
  a compound type dataset are compared. This also occurs with variable-length
  string arrays in a compound type dataset. See bug #1989. This will be fixed
  in the next release. JKM - 2010/11/05

* The AIX --enable-shared setting does not quite work. It can produce a shared
  library, but there cannot be more than one shared library that is
  interlinked. This means that the high level APIs will not work which is not
  very useful. We hope to have a solution in the next release.
  (AKC - 2010/10/15)

* H5Eset_auto can cause a seg fault for a library API call if the application
  compiles with -DH5_USE_16_API (see bug 1707).  It will be fixed in the
  next release. SLU - 2010/10/5

* The library's test dt_arith.c showed a compiler's rounding problem on
  Cygwin when converting an unsigned long long to a long double.  The
  library's own conversion works fine.  We defined a macro for Cygwin to
  skip this test until we can solve the problem.  Please see bug #1813.
  SLU - 2010/5/5

* All the VFL drivers aren't backwardly compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  A new parameter was added to the
  get_eoa and set_eoa callback functions, and a new callback function
  get_type_map was added. The public function H5FDrealloc was taken out in
  1.8.  The problem only happens when users define their own driver for 1.6
  and try to plug in a 1.8 library. This will be fixed in 1.10. SLU - 2010/2/2

* MinGW has a missing libstdc++.dll.a library file and will not successfully link
  C++ applications/tests. Do not use the enable-cxx configure option. Read all of
  the INSTALL_MINGW.txt file for all restrictions. ADB - 2009/11/11

* The PathScale MPI implementation, accessing a Panasas file system, would
  cause H5Fcreate() with H5F_ACC_EXCL to fail even when the file does not
  exist. This is due to the MPI_File_open() call failing if the amode has
  the MPI_MODE_EXCL bit set. (See bug 1468 for details.) AKC - 2009/8/11

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO. CMC - 2009/04/28

* For Red Storm, a Cray XT3 system, the tools/h5ls/testh5ls.sh and
  tools/h5copy/testh5copy.sh will fail some of their sub-tests. These
  sub-tests are expected to fail and should exit with a non-zero code but
  the yod command does not propagate the exit code of the executables. Yod
  always returns 0 if it can launch the executable.  The test suite shell
  expects a non-zero for this particular test. Therefore, it concludes the
  test has failed when it receives 0 from yod.  To skip all the "failing"
  tests for now, change them as shown below.

  ======== Original tools/h5ls/testh5ls.sh =========
  TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ======== Change to ===============================
  echo SKIP TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ==================================================

  ======== Original tools/h5copy/testh5copy.sh =========
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  H5LSTEST $FILEOUT
  ======== Change to ===============================
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  echo SKIP H5LSTEST $FILEOUT
  ==================================================
  AKC - 2008/11/10

* For Red Storm, a Cray XT3 system, the yod command sometimes gives the
  message  "yod allocation delayed for node recovery."  This interferes
  with test suites that do not expect to see this message.  See the "Red Storm"
  section in file INSTALL_parallel for a way to deal with this problem.
  AKC - 2008/05/28

* On an Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use the -mp -O1 compilation flags to build the libraries. A higher level
  of optimization causes failures in several HDF5 library tests.

* On mpich 1.2.5 and 1.2.6 on a system using four processors, if more than
  two processes contribute no I/O and the application asks to do collective
  I/O, we have found that a simple collective write will sometimes hang. This
  can be verified with the t_mpi test under testpar.

* A dataset created or rewritten with a v1.6.3 or later library cannot be
  read with the v1.6.2 or earlier library when the Fletcher32 EDC filter
  is enabled. There was a bug in the calculation of the Fletcher32 checksum
  in the library before v1.6.3; the checksum value was not consistent
  between big-endian and little-endian systems.  This bug was fixed in
  Release 1.6.3. However, after fixing the bug, the checksum value was no
  longer the same as before on little-endian system.  Library releases after
  1.6.4 can still read datasets created or rewritten with an HDF5 library of
  v1.6.2 or earlier. SLU - 2005/6/30

* On IBM AIX systems, parallel HDF5 mode will fail some tests with error
  messages like "INFO: 0031-XXX ...".  This is from the command `poe'. To
  work around this, set the environment variable MP_INFOLEVEL to 0 to
  minimize the messages and run the tests again. The tests may fail with
  messages like "The socket name is already in use", but HDF5 does not use
  sockets. This failure is due to problems with the poe command trying to
  set up the debug socket.  To resolve this problem, check to see whether
  there are any old /tmp/s.pedb.* files around. These are sockets used by
  the poe command and left behind if the command failed at some point. To
  resolve this, ask your system administrator to remove the
  old/tmp/s.pedb.* files, and then ask IBM to provide a means to run poe
  without the debug socket.

* The --enable-static-exec configure flag will only statically link
  libraries if the static version of that library is present. If only the
  shared version of a library exists (i.e., most system libraries on
  Solaris, AIX, and Mac, for example, only have shared versions), the flag
  should still result in a successful compilation, but note that the
  installed executables will not be fully static. Thus, the only guarantee
  on these systems is that the executable is statically linked with just
  the HDF5 library.

* On an SGI Altix SMP ia64 system, the Intel compiler version 10.1 (which
  is the default on that system) does not work properly and results in
  failures during the make check (in a static build) and the make
  installcheck (in a shared build). This appears to be a compiler
  optimization problem. Reducing the optimization by setting CFLAGS to
  -O1 or below resolves the issue. Using a newer version of the compiler
  (11.0) avoids the issue. MAM - 2010/06/01

* On solaris systems, when running the examples with the scripts installed in
  .../share/hdf5_examples, two of the c tests, h5_extlink and h5_elink_unix2win
  may fail or generate HDF5 errors because the script commands in c/run-c-ex.sh
  fail to create test directories red, blue, and u2w.  Moving the '!' in lines
  67, 70, 73 of run-c-ex.sh will fix the problem.  For example the script command
  "if ! test -d red; then" will work on solaris if changed to
  "if test ! -d red; then".


%%%%1.8.5%%%%


HDF5 version 1.8.5 released on Fri Jun  4 13:27:31 CDT 2010
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.4 and HDF5 1.8.5, and
contains information on the platforms tested and known problems in HDF5-1.8.5.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt and HISTORY-1_8.txt
in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.5 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.5 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.5 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.5 (current
release) versus Release 1.8.4":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.4
- Platforms Tested
- Supported Configuration Features Summary
- Known Problems


New Features
============

    Configuration
    -------------
    - CMake Early Access: This release adds support for building HDF5 using
      the CMake system. Initial work has targeted Windows, but other platforms
      can be used. See the CMake.TXT file for more information. Version
      2.8.1 of CMake is required.
    - Configure now adds appropriate defines for supporting large (64-bit)
      files on all systems, where supported, by default, instead of only Linux.
      This large file support is controllable with the --enable-largefile
      configure option. The Linux-specific --enable-linux-lfs option has been
      deprecated in favor of this new option. Please note that specifying
      --disable-large does NOT attempt to "turn off" largefile support if it
      is natively supported by the compiler, but rather just disables
      configure from actively trying to add any additional compiler flags.
      (MAM - 2010/05/05 - Bug # 1772/1434)
    - Fixed an signal handling mask error in H5detect that might result in
      SIGBUS or SIGSEGV failures in some platforms such as Linux on Sparc.
      (AKC - 2010/4/28 - Bug # 1764)
    - Fixed various "strict aliasing" problems, allowing higher levels
      of compiler optimization (in particular, allowing '-O3' to work
      with recent versions of GCC).  (QAK - 2010/04/26)
    - Upgraded versions of autotools used to generate configuration suite.
      We now use Automake 1.11.1, Autoconf 2.65, and Libtool 2.2.6b.
      (MAM - 2010/04/15)
    - Added the xlc-* and mpcc_r-* BASENAME patterns to be recognized as IBM
      compilers so that the IBM compiler options can be added properly.  This
      allows non-system-default compiler command names (e.g. xlc-m.n.k.l) be
      recognized. (AKC - 2009/11/26)

    Library
    -------
    - Performance is substantially improved when extending a dataset with early
      allocation. (NAF - 2010/03/24 - Bug # 1637)
    - Added support for filtering densely stored groups.  Many of the API
      functions related to filters have been extended to support dense groups
      as well as datasets.  Pipeline messages can now be stored in a group's
      object header. (NAF/QAK - 2009/11/3)

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - h5dump: Added the new packed bits feature which prints packed bits stored
      in an integer dataset. (AKC/ADB - 2010/5/7)
    - h5diff: Fixed incorrect behavior (hang) in parallel mode when specifying
      invalid options (ex: -v and -q). (JKM - 2010/02/17)
    - h5diff: Added new flag --no-dangling-links (see --help for details).
      (JKM - 2010/02/10)
    - h5diff: Added new flag --follow-symlinks (see --help for details).
      (JKM - 2010/01/25)
    - h5diff: Added a fix to correct the display of garbage values when
      displaying big-endian data on a little-endian machine. (JKM - 2009/11/20)

    High-Level APIs
    ---------------
    - None

    F90 API
    -------
    - None

    C++ API
    -------
    - New member functions
        + Overloaded CommonFG::getObjnameByIdx to take char* for name.
        + Overloaded CommonFG::getObjTypeByIdx to return type name as a char*.
          (BMR - 2010/05/10)
        + Added DataSet::getInMemDataSize() to simplify getting the dataset's
          data size in memory.  (BMR - 2009/07/26)


Support for New Platforms, Languages, and Compilers
===================================================
    - AIX 6.1 has been added. (AKC - 2010/1/4)


Bug Fixes since HDF5-1.8.4
==========================

    Configuration
    -------------
    - Fixed various "strict aliasing" problems, allowing higher levels
      of compiler optimization (in particular, allowing '-O3' to work
      with recent versions of GCC).  (QAK - 2010/04/26)

    Library
    -------
    - Fixed a file corruption bug that could happen when shrinking a compressed
      dataset. (NAF - 2010/05/20)
    - Fixed some memory leaks in VL datatype conversion when strings are
      used as fill values. (MAM - 2010/05/12 - Bug # 1826)
    - Fixed an H5Rcreate failure when passing in a -1 for the dataspace
      identifier. (ADB - 2010/4/28)
    - Fixed a bug when copying objects with NULL references with the
      H5O_COPY_EXPAND_REFERENCE_FLAG flag set. (NAF - 2010/04/08 - Bug # 1815)
    - Added a mechanism to the H5I interface to save returned object identifier
      structures for immediate re-use if needed. This addresses a potential
      performance issue by delaying the case when the next identifier to be
      registered has grown so large that it wraps around and needs to be
      checked to see whether it is available for distribution.
      (MAM - 2010/03/15 - Bug # 1730)
    - Files can now be concurrently opened more than once using the core file
      driver, as long as the backing store is used. (NAF - 2010/03/09)
    - Added support for H5O_COPY_EXPAND_EXT_LINK_FLAG to H5Ocopy.  External
      links will now be expanded if this flag is set.
      (NAF - 2010/03/05 - Bug # 1733)
    - Fixed a bug where the library, when traversing an external link, would
      reopen the source file if nothing else worked. (NAF - 2010/03/05)
    - Fixed a bug where fractal heap identifiers for attributes and shared
      object header messages could be incorrectly encoded in the file for
      files created on big-endian platforms.
      Please see http://www.hdfgroup.org/HDF5/release/known_problems if you
      suspect you have a file with this problem.
      (QAK - 2010/02/23 - Bug # 1755)
    - Fixed an intermittent bug in the b-tree code which could be triggered
      by expanding and shrinking chunked datasets in certain ways.
      (NAF - 2010/02/16)
    - H5Tdetect_class said a VL string is a string type.  But when it's in
      a compound type, it said it's a VL type.  THis has been fixed to be
      consistent; it now always returns a string type.
      (SLU - 2009/12/10 - Bug # 1584)
    - Allow "child" files from external links to be correctly located when
      relative to a "parent" file that is opened through a symbolic link.
      (QAK - 2009/12/01)

    Parallel Library
    ----------------
    - Parallel mode in AIX will fail some of the testcheck_version.sh tests
      where it treats "exit(134) the same as if process 0 had received an abort
      signal.  Fixed.  (AKC - 2009/11/3)

    Tools
    -----
    - Fixed h5ls to return exit code 1 (error) when a non-existent file is
      specified. (JKM - 2010/04/27 - Bug # 1793)
    - Fixed h5copy failure when copying a dangling link that is specified
      directly. (JKM - 2010/04/22 - Bug # 1817)
    - Fixed an h5repack failure that lost attributes from a dataset of
      reference type. (JKM - 2010/3/25 - Bug # 1726)
    - Fixed h5repack error that set NULL for object reference values for
      datasets, groups, or named datatypes. (JKM - 2010/03/19 - Bug # 1814)

    F90 API
    ------
    - None

    C++ API
    ------
    - The constructor PropList::PropList(id) was fixed to act properly
      according to the nature of 'id'.  When 'id' is a property class
      identifier, a new property list will be created.  When 'id' is a
      property list identifier, a copy of the property list will be made.
      (BMR - 2010/5/9)
    - The parameters 'size' and 'bufsize' in CommonFG::getLinkval and
      CommonFG::getComment, respectively, now have default values for the
      user's convenience.  (BMR - 2009/10/23)
    - NULL pointer accessing was fixed.  (BMR - 2009/10/05 - Bug # 1061)
    - Read/write methods of DataSet and Attribute classes were fixed
      to handle string correctly.  (BMR - 2009/07/26)

    High-Level APIs:
    ------
    - Fixed a bug in H5DSattach_scale, H5DSis_attached, and H5DSdetach_scale
      caused by using the H5Tget_native_type function to determine the native
      type for reading the REFERENCE_LIST attribute. This bug was exposed
      on Mac PPC.  (EIP - 2010/05/22 - Bug # 1851)
    - Fixed a bug in the H5DSdetach_scale function when 0 bytes were
      allocated after the last reference to a dimension scale was removed
      from the list of references in a VL element of the DIMENSION_LIST
      attribute.  Modified the function to comply with the specification:
      the DIMENSION_LIST attribute is now deleted when no dimension scales
      are left attached.  (EIP - 2010/05/14 - Bug # 1822)

    Fortran High-Level APIs:
    ------
    - None


Platforms Tested
================
The following platforms and compilers have been tested for this release.

    AIX 5.3                       xlc 7.0.0.9, 8.0.0.20, 9.0.0.4
    (LLNL Up)                     xlC 7.0.0.9, 8.0.0.20, 9.0.0.4
                                  xlf 9.1.0.9, 10.1.0.9, 11.1.0.7
                                  mpcc_r 7.0.0.9
                                  mpxlf_r 09.01.0000.0008

    AIX 6.1                       xlc 10.1.0.6
    (NCSA BP)                     xlC 10.1.0.6
                                  xlf 12.1.0.7

    Cray XT3 (2.1.56)             cc (pgcc) 10.0-0
    (SNL red storm)               ftn (pgf90) 10.0-0
                                  CC (pgCC) 10.0-0

    FreeBSD 6.3-STABLE i386       gcc 3.4.6 [FreeBSD] 20060305
    (duty)                        g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.3.4 20090419
                                  g++ 4.3.4 20090419
                                  gfortran 4.3.4 20090419

    FreeBSD 6.3-STABLE amd64      gcc 3.4.6 [FreeBSD] 20060305
    (liberty)                     g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.4.1 20090421
                                  g++ 4.4.1 20090421
                                  gfortran 4.4.1 20090421

    Linux 2.6.18-128.1.6.el5xen   gcc (GCC) 4.1.2 20080704 and 4.4.2
    #1 SMP i686 i686 i386         GNU Fortran (GCC) 4.1.2 20080704 and 4.4.2
    (jam)                         g++ (GCC) 4.1.2 20080704 and 4.4.2
                                  G95 (GCC 4.0.3 (g95 0.93!) Apr 21 2010)
                                  Absoft 32-bit Fortran 95 10.0.7
                                  PGI C, Fortran, C++ 10.4-0 32-bit
                                  Intel(R) C, C++, Fortran Compilers for 32-bit
                                     applications, Version 11.1 Build 20090827
                                  MPICH mpich2-1.0.8 compiled with
                                     gcc 4.1.2 and GNU Fortran (GCC) 4.1.2

    Linux 2.6.18-164.el5 #1 SMP   gcc 4.1.2 20080704 and gcc 4.4.2
    x86_64 GNU/Linux              GNU Fortran (GCC) 4.1.2 20080704 and 4.4.2
    (amani)                       g++ (GCC) 4.1.2 20080704 and 4.4.2
                                  G95 (GCC 4.0.3 (g95 0.93!) Apr 21 2010)
                                  Intel(R) C, C++, Fortran Compilers for
                                     applications running on Intel(R) 64,
                                     Version 11.1 Build 20090827.
                                  PGI C, Fortran, C++ Version 10.4-0
                                         for 32 & 64-bit target on x86-64
                                  MPICH mpich2-1.0.8 compiled with
                                     gcc 4.1.2 and GNU Fortran (GCC) 4.1.2

    Linux 2.6.16.54-0.2.5 #1      Intel(R) C++ Version 11.0.074
    SGI Altix SMP ia64            Intel(R) Fortran Itanium(R) Version 11.0.074
    (cobalt)                      SGI MPI 1.38

    SunOS 5.10 32- and 64-bit     Sun C 5.9 SunOS_sparc Patch 124867-14
    (linew)                       Sun Fortran 95 8.3 SunOS_sparc
                                     Patch 127000-13
                                  Sun C++ 5.9 SunOS_sparc Patch 124863-23

    Intel Xeon Linux 2.6.18-      Intel(R) C++ Version 10.0.026
    92.1.10.el5_lustre.1.6.6smp-  Intel(R) Fortran Compiler Version 10.0.026
    perfctr #7 SMP                Open MPI 1.2.2
    (abe)                         MVAPICH2-0.9.8p28p2patched-intel-ofed-1.2
                                  compiled with icc v10.0.026 and ifort 10.0.026

    Linux 2.6.18-76chaos #1 SMP   Intel(R) C, C++, Fortran Compilers for
    SMP x86_64 GNU/Linux          applications running on Intel(R) 64,
    (SNL Glory)                   Versions 11.1.

    Windows XP                    Visual Studio 2008 w/ Intel Fortran 10.1
                                  Cygwin(1.7.5 native gcc(4.3.4) compiler and
                                  gfortran)

    Windows XP x64                Visual Studio 2008 w/ Intel Fortran 10.1

    Windows Vista                 Visual Studio 2008 w/ Intel Fortran 10.1

    Windows Vista x64             Visual Studio 2008 w/ Intel Fortran 10.1

    MAC OS  10.6.3 (Intel)        i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1
    (pahra)                       GNU Fortran (GCC) 4.5.0 20090910
                                  i686-apple-darwin10-g++-4.2.1 (GCC) 4.2.1
                                  Intel C, C++ and Fortran compilers 11.1

    MAC OS  10.5.8 (Intel)        i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1
    (tejeda)

    MAC OS  10.5 (PPC)            powerpc-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1
    (juniper-w)

    OpenVMS Alpha V8.3            HP C V7.3-009
                                  HP C++ V7.3-009
                                  HP Fortran V8.0-1-104669-48GBT

Supported Configuration Features Summary
========================================

    In the tables below
          y   = tested and supported
          n   = not supported or not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                           C        F90    F90      C++   zlib  SZIP
                                   parallel        parallel
Solaris2.10 32-bit                   n        y      n        y     y     y
Solaris2.10 64-bit                   n        y      n        y     y     y
Windows XP                           n        y(4)   n(4)     y     y     y
Windows XP x64                       n        y(4)   n(4)     y     y     y
Windows Vista                        n        y(4)   n(4)     y     y     y
Windows Vista x64                    n        y(4)   n(4)     y     y     y
Mac OS X 10.5 PPC                    n        n      n        n     y     n
Mac OS X 10.5 Intel                  n        y      n        y     y     y
Mac OS X 10.6 Intel                  n        y      n        y     y     y
AIX 5.3 32- and 64-bit               n        y      n        y     y     n
AIX 6.1 32- and 64-bit               n        y      n        y     y     n
FreeBSD 6.3-STABLE 32&64 bit         n        y      n        y     y     y
RedHat EL4 2.6.9-42 i686 GNU (1)  W  y        y      y        y     y     y
RedHat EL5 2.6.18-128 i686 GNU (1)W  y        y(2)   y        y     y     y
RedHat EL5 2.6.18-128 i686 Intel  W  n        y      n        y     y     n
RedHat EL5 2.6.18-128 i686 PGI    W  n        y      n        y     y     n
SuSe Linux 2.6.16 x86_64 GNU (1)  W  y        y(3)   y        y     y     y
SuSe Linux 2.6.16 x86_64 Intel    W  n        y      n        y     y     n
SuSe Linux 2.6.16 x86_64 PGI      W  n        y      n        y     y     y
SuSe Linux 2.6.16 SGI Altix ia64  C  y        y      y        y     y     y
RedHat EL4 2.6.18 Xeon Lustre     C  y        y      y        y     y     n
Cray XT3 2.1.56                      y        y      y        y     y     n
OpenVMS Alpha V8.3                   n        y      n        y     y     n

Platform                           Shared  Shared    Shared    Thread-
                                   C libs  F90 libs  C++ libs  safe
Solaris2.10 32-bit                   y       y         y         y
Solaris2.10 64-bit                   y       y         y         y
Windows XP                           y       y(4)      y         n
Windows XP x64                       y       y(4)      y         n
Windows Vista                        y       y(4)      y         n
Windows Vista x64                    y       y(4)      y         n
Mac OS X 10.5 PPC                    y       n         n         n
Mac OS X 10.5 (Intel)                y(5)    n         y         n
Mac OS X 10.6 (Intel)                y(5)    n         y         n
AIX 5.3 32- and 64-bit               n       n         n         n
AIX 6.1 32- and 64-bit               n       n         n         n
FreeBSD 6.3-STABLE 32&64 bit         y       n         y         y
RedHat EL4 2.6.9-42 i686 GNU (1)  W  y       y         y         y
RedHat EL5 2.6.18-128 i686 GNU (1)W  y       y(2)      y         y
RedHat EL5  2.6.18-128 i686 Intel W  y       y         y         n
RedHat EL5 2.6.18-128 i686 PGI    W  y       y         y         n
SuSe Linux 2.6.16 x86_64 GNU (1)  W  y       y         y         y
SuSe Linux 2.6.16 x86_64 Intel    W  y       y         y         n
SuSe Linux 2.6.16 x86_64 PGI      W  y       y         y         n
SuSe Linux 2.6.16 SGI Altix ia64  C  y                           n
RedHat EL4 2.6.18 Xeon Lustre     C  y       y         y         n
Cray XT3 2.1.56                      n       n         n         n
OpenVMS Alpha V8.3                   n       n         n         n

           (1) Fortran compiled with g95.
           (2) With PGI and Absoft compilers.
           (3) With PGI compiler for Fortran.
           (4) Using Visual Studio 2008. (Cygwin shared libraries are not
               supported.)
           (5) Shared C and C++ are disabled when Fortran is configured in.
    Compiler versions for each platform are listed in the preceding
    "Platforms Tested" table.


Known Problems
==============
* The library's test dt_arith.c exposed a compiler's rounding problem on
  Cygwin when converting from unsigned long long to long double.  The
  library's own conversion works correctly.  A macro is defined for Cygwin
  to skip this test until we can solve the problem.  (Please see bug #1813.)
  SLU - 2010/5/5

* All the VFL drivers aren't backward compatible.  In H5FDpublic.h, the
  structure H5FD_class_t changed in 1.8.  There is a new parameter added to
  get_eoa and set_eoa callback functions.  A new callback function
  get_type_map was added.  The public function H5FDrealloc was taken
  out in 1.8.  The problem only happens when users define their own driver
  for 1.6 and try to plug it into a 1.8 library.  This affects a very small
  number of users.  (See bug report #1279.)  SLU - 2010/2/2

* MinGW has a missing libstdc++.dll.a library file and will not successfully
  link C++ applications/tests. Do not use the enable-cxx configure option.
  Read all of the INSTALL_MINGW.txt file for all restrictions.
  ADB - 2009/11/11

* Some tests in tools/h5repack may fail in AIX systems when -q32 mode is used.
  The error is due to insufficient memory requested. Request a large amount
  of runtime memory by setting the following environment variable for more
  memory.
     LDR_CNTRL=MAXDATA=0x20000000@DSA
  AKC - 2009/10/31

* The PathScale MPI implementation, accessing a Panasas file system, would
  cause H5Fcreate() with H5F_ACC_EXCL to fail even when the file is not
  existing. This is due to the MPI_File_open() call failing if the amode has
  the MPI_MODE_EXCL bit set. (See bug 1468 for details.) AKC - 2009/8/11

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO. CMC - 2009/04/28

* For gcc v4.3 and v4.4, with production mode, if -O3 is used, H5Tinit.c
  would fail to compile. Actually bad H5Tinit.c is produced.  If -O (same
  as -O1) is used, H5Tinit.c compiled okay but test/dt_arith would fail.
  When -O0 (no optimizatio) is used, H5Tinit.c compilete okay and all
  tests passed. Therefore, -O0 is imposed for v4.3 and v4.4 of gcc.
  AKC - 2009/04/20

* For Red Storm, a Cray XT3 system, the tools/h5ls/testh5ls.sh and
  tools/h5copy/testh5copy.sh will fail some of its sub-tests. These sub-tests
  are expected to fail and should exit with a non-zero code but the yod
  command does not propagate the exit code of the executables. Yod always
  returns 0 if it can launch the executable.  The test suite shell expects
  a non-zero for this particular test, therefore it concludes the test has
  failed when it receives 0 from yod.  Skip all the "failing" test for now
  by changing them as following.

  ======== Original tools/h5ls/testh5ls.sh =========
  TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ======== Change to ===============================
  echo SKIP TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ==================================================

  ======== Original tools/h5copy/testh5copy.sh =========
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  H5LSTEST $FILEOUT
  ======== Change to ===============================
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  echo SKIP H5LSTEST $FILEOUT
  ==================================================
  AKC - 2008/11/10

* For Red Storm, a Cray XT3 system, the yod command sometimes gives the
  message,  "yod allocation delayed for node recovery".  This interferes with
  test suites that do not expect seeing this message.  See the section of "Red
  Storm" in file INSTALL_parallel for a way to deal with this problem.
  AKC - 2008/05/28

* On Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* On mpich 1.2.5 and 1.2.6, if more than two processes contribute no IO and
  the application asks to do collective IO, we have found that when using 4
  processors, a simple collective write will sometimes be hung. This can be
  verified with t_mpi test under testpar.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  SLU - 2005/6/30

* On IBM AIX systems, parallel HDF5 mode will fail some tests with error
  messages like "INFO: 0031-XXX ...".  This is from the command `poe'.
  Set the environment variable MP_INFOLEVEL to 0 to minimize the messages
  and run the tests again.

  The tests may fail with messages like "The socket name is already in use,"
  but HDF5 does not use sockets.  This failure is due to problems with the
  poe command trying to set up the debug socket.  To resolve this problem,
  check to see whether there are many old /tmp/s.pedb.* files staying around.
  These are sockets used by the poe command and left behind due to failed
  commands.  First, ask your system administrator to clean them out.
  Lastly, request IBM to provide a means to run poe without the debug socket.

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.

* There is also a configure error on Altix machines that incorrectly reports
  when a version of Szip without an encoder is being used.

* On FREE-BSD systems when shared libraries are disabled, make install fails
  in install-examples with the error '"Makefile", line 635: Need an operator'.
  When this error occurs removing or commenting out the line "export
  LD_LIBRARY_PATH=$(LL_PATH)" (line 635 in examples/Makefile) will allow make
  install to finish installing examples.  The problem will be fixed in the
  next release. LRK - 2010/05/26

* On cobalt, an SGI Altix SMP ia64 system, Intel compiler version 10.1 (which
  is the default on that system) does not work properly and results in
  failures during make check (in a static build) and make installcheck (during
  a shared build). This appears to be a compiler optimization problem.
  Reducing optimization by setting CFLAGS to -O1 or below resolves the issue.
  Alternatively, using a newer version of the compiler (11.0) also works as
  intended. MAM - 2010/06/01


%%%%1.8.4%%%%


HDF5 version 1.8.4 released on Tue Nov 10 15:33:14 CST 2009
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.3 and
HDF5 1.8.4, and contains information on the platforms tested and
known problems in HDF5-1.8.4
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.4 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.4 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.4 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.4 (current
release) versus Release 1.8.3":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.3
- Platforms Tested
- Supported Configuration Features Summary
- Known Problems


New Features
============

    Configuration
    -------------
    - Configuration suite now uses Automake 1.11 and Autoconf 2.64.
      MAM 2009/08/31.
    - Changed default Gnu fortran compiler from g95 to gfortran since
      gfortran is more likely installed with gcc now. -AKC 2009/07/19-

    Library
    -------
    - The embedded library information is displayed by H5check_version() if a
      version mismatch is detected.  Also changed H5check_version() to
      suppress the warning message totally if $HDF5_DISABLE_VERSION_CHECK is 2
      or higher. (Old behavior treated 3 or higher the same as 1, that is
      print a warning and allows the program to continue. (AKC - 2009/9/28)
    - If a user does not care for the extra library information insert
      in the executables, he may turn it off by --disable-embedded-libinfo
      during configure. (AKC - 2009/9/15)

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - h5diff: h5diff treats two INFINITY values different. Fixed by checking
      (value==expect) before call ABS(...) at h5diff_array.c. This will make
      that (INF==INF) is true (INF is treated as an number instead of NaN)
      (PC -- 2009/07/28)
    - h5diff: add option "--use-system-epsilon" to print difference if
      (|a-b| > EPSILON).
      Change default to use strict equality (PC -- 2009/09/12)

    High-Level APIs
    ---------------
    - None

    F90 API
    -------
     - Added H5Oopen_by_addr_f MSB - 9/14/09

    C++ API
    -------
    - None


Support for New Platforms, Languages, and Compilers
===================================================
    - PathScale compilers are recognized and can build the HDF5 library
      properly. AKC - 2009/7/28 -


Bug Fixes since HDF5-1.8.3
==========================

    Configuration
    -------------
    - Removed the following config files, as we no longer support them:
        config/dec-osf*, config/hpux11.00, config/irix5.x,
        config/powerpc-ibm-aix4.x config/rs6000-ibm-aix5.x config/unicos*
      MAM - 2009/10/08
    - Modified configure and make process to properly preserve user's CFLAGS
      (and company) environment variables. Build will now properly use
      automake's AM_CFLAGS for any compiler flags set by the configure
      process. Configure will no longer modify CFLAGS directly, nor will
      setting CFLAGS during make completely replace what configure has set up.
      MAM - 2009/10/08
    - Support for TFLOPS, config/intel-osf1, is removed since the TFLOPS
      machine has long retired. AKC - 2009/10/06.
    - Added $(EXEEXT) extension to H5detect when it's executed in the
      src/Makefile to generate H5Tinit.c so it works correctly on platforms
      that require the full extension when running executables.
      MAM - 2009/10/01 - BZ #1613
    - Configure will now set FC and CXX to "no" when fortran and c++
      are not being compiled, respectively, so configure will not run
      some of the compiler tests for these languages when they are not
      being used. MAM - 2009/10/01
    - The --enable-static-exec flag will now properly place the -static flag
      on the link line of all installed executables. This will force the
      executable to link with static libraries over shared libraries, provided
      the static libraries are available. MAM - 2009/08/31 - BZ #1583
    - The PathScale compiler (v3.2) was mistaken as gcc v4.2.0 but it fails to
      recognize some gcc options. Fixed. (see bug 1301). AKC - 2009/7/28 -

    Library
    -------
    - Fixed a bug where writing and deleting many global heap objects (i.e.
      variable length data) would render the file unreadable.  Previously
      created files exhibiting this problem should now be readable.
      NAF - 2009/10/27 - 1483
    - Fixed error in library's internal caching mechanisms which could cause
      an assertion failure (and attendant core dump) when encountering an
      unusually formatted file.  (QAK - 2009/10/13)
    - Fixed incorrect return value for H5Pget_preserve. AKC - 2009/10/08 - 1628
    - Fixed an assertion failure that occurred when H5Ocopy was called on a
      dataset using a vlen inside a compound. NAF - 2009/10/02 - 1597
    - Fixed incorrect return value for H5Pget_filter_by_id1/2 in H5Ppublic.h.
      NAF - 2009/09/25 - 1620
    - Fixed a bug where properties weren't being compared with the registered
      compare callback. NAF - 2009/09/25 - 1555
    - Corrected problem where library would re-write the superblock in a file
      opened for R/W access, even when no changes were made to the file.
      (QAK - 2009/08/20, Bz#1473)
    - Fixed a bug where H5Pget_filter_by_id would succeed when called for a
      filter that wasn't present. NAF - 2009/06/25 - 1250
    - Fixed an issue with committed compound datatypes containing a vlen. Also
      fixed memory leaks involving committed datatypes. NAF - 2009/06/10 - 1593

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - h5dump/h5ls display buffer resize fixed in tools library.
      ADB - 2009/7/21 - 1520
    - perf_serial test added to Windows projects and check batch file.
      ADB - 2009/06/11 -1504


    F90 API
    ------
    - Fixed bug in h5lget_info_by_idx_f by adding missing arguments,
      consequently changing the API. New API is:

      SUBROUTINE h5lget_info_by_idx_f(loc_id, group_name, index_field, order, n, &
        link_type, f_corder_valid, corder, cset, address, val_size, hdferr, lapl_id)

        MSB - 2009/9/17 - 1652

    - Corrected the values for the H5L_flags FORTRAN constants:
        H5L_LINK_ERROR_F, H5L_LINK_HARD_F, H5L_LINK_SOFT_F, H5L_LINK_EXTERNAL_F
        MSB - 2009-09-17 - 1653

    - Added FORTRAN equivalent of C constant H5T_ORDER_NONE: H5T_ORDER_NONE_F
        MSB - 2009-9-24 - 1471

    C++ API
    ------
    - None

    High-Level APIs:
    ------
    - Fixed a bug where the H5TB API would forget the order of fields when added
      out of offset order. NAF - 2009/10/27 - 1582
    - H5DSis_attached failed to account for different platform types. Added a
      get native type call. ADB - 2009/9/29 - 1562

    Fortran High-Level APIs:
    ------
    - Lite: the h5ltread_dataset_string_f and h5ltget_attribute_string_f functions
           had memory problems with the g95 fortran compiler. (PVN � 5/13/2009) 1522



Platforms Tested
================
The following platforms and compilers have been tested for this release.

    AIX 5.3                       xlc 7.0.0.8
    (LLNL Up)                     xlf 09.01.0000.0008
                                  xlC 7.0.0.8
                                  mpcc_r 7.0.0.8
                                  mpxlf_r 09.01.0000.0008

    Cray XT3 (2.0.41)             cc (pgcc) 7.1-4
    (SNL red storm)               ftn (pgf90) 7.1-4
                                  CC (pgCC) 7.1-4

    FreeBSD 6.3-STABLE i386       gcc 3.4.6 [FreeBSD] 20060305
    (duty)                        g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.3.5 20091004
                                  g++ 4.3.5 20091004
                                  gfortran 4.3.5 20091004

    FreeBSD 6.3-STABLE amd64      gcc 3.4.6 [FreeBSD] 20060305
    (liberty)                     g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.4.2 20091006
                                  g++ 4.4.2 20091006
                                  gfortran 4.4.2 20091006

    Linux 2.6.18-164.el5          gcc (GCC) 4.1.2 20080704
    #1 SMP i686 i686 i386         G95 (GCC 4.0.3 (g95 0.92!) Jun 24 2009)
    (jam)                         GNU Fortran (GCC) 4.1.2 20080704
                                  (Red Hat 4.1.2-46)
                                  PGI C, Fortran, C++ 8.0-5 32-bit
                                  PGI C, Fortran, C++ 8.0-1 32-bit
                                  Intel(R) C Compiler for 32-bit
                                      applications, Versions 11.0, 11.1
                                  Intel(R) C++ Compiler for 32-bit
                                      applications, Version 11.0, 11.1
                                  Intel(R) Fortran Compiler for 32-bit
                                      applications, Version 11.0, 11.1
                                  Absoft 32-bit Fortran 95 10.0.7
                                  MPICH mpich2-1.0.8 compiled with
                                  gcc (GCC) 4.1.2 and G95
                                  (GCC 4.0.3 (g95 0.92!)

    Linux 2.6.18-164.el5 #1 SMP   gcc 4.1.2 20080704
    x86_64 GNU/Linux              G95 (GCC 4.0.3 (g95 0.92!) Jun 24 2009)
    (amani)                       tested for both 32- and 64-bit binaries
                                  Intel(R) C, C++, Fortran Compilers for
                                  applications running on Intel(R) 64,
                                  Versions 11.1.
                                  PGI C, Fortran, C++ Version 9.0-4
                                         for 64-bit target on x86-64
                                  gcc 4.1.2 and G95  (GCC 4.0.3 (g95 0.92!)
                                  MPICH mpich2-1.0.8 compiled with
                                  gcc 4.1.2 and G95 (GCC 4.0.3 (g95 0.92!)
                                  GNU Fortran (GCC) 4.1.2 20080704
                                  (Red Hat 4.1.2-46)


    Linux 2.6.16.60-0.42.5 #1     Intel(R) C++ Version 10.1.017
    SGI Altix SMP ia64            Intel(R) Fortran Itanium(R) Version 10.1.017
    (cobalt)                      SGI MPI 1.38

    SunOS 5.10 32- and 64-bit     Sun C 5.9 SunOS_sparc Patch 124867-11 2009/04/30
    (linew)                       Sun Fortran 95 8.3 SunOS_sparc
                                  Patch 127000-11 2009/10/06
                                  Sun C++ 5.9 SunOS_sparc
                                  Patch 124863-16 2009/09/15

    Intel Xeon Linux 2.6.18-      Intel(R) C++ Version 10.0.026
    92.1.10.el5_lustre.1.6.6smp-  Intel(R) Fortran Compiler Version 10.0.026
    perfctr #6 SMP                Open MPI 1.2.2
    (abe)                         MVAPICH2-0.9.8p28p2patched-intel-ofed-1.2
                                  compiled with icc v10.0.026 and ifort 10.0.026

    IA-64 Linux 2.4.21-309.tg1    gcc (GCC) 3.2.2
    #1 SMP ia64                   Intel(R) C++ Version 8.1.037
    (NCSA tg-login)               Intel(R) Fortran Compiler Version 8.1.033
                                  mpich-gm-1.2.7p1..16-intel-8.1.037-r1

    Linux 2.6.9-55.0.9.EL_lustre  Intel(R) C, C++, Fortran Compilers for
    .1.4.11.1smp #1 SMP           applications running on Intel(R) 64,
    SMP x86_64 GNU/Linux          Versions 10.1.
    (SNL Thunderbird)

    Linux 2.6.18-76chaos #1 SMP   Intel(R) C, C++, Fortran Compilers for
    SMP x86_64 GNU/Linux          applications running on Intel(R) 64,
    (SNL Glory)                   Versions 10.1.

    Windows XP                    Visual Studio 2005 w/ Intel Fortran 9.1
                                  Cygwin(native gcc compiler and g95)

    Windows XP x64                Visual Studio 2005 w/ Intel Fortran 9.1

    Windows Vista                 Visual Studio 2005 w/ Intel Fortran 9.1

    Windows Vista x64             Visual Studio 2005 w/ Intel Fortran 9.1

    MAC OS  10.5.6 (Intel)        i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1
                                  GNU Fortran (GCC) 4.3.0 20070810
                                  G95 (GCC 4.0.3 (g95 0.91!) Apr 24 2008)
                                  Intel C, C++ and Fortran compilers 10.1


Supported Configuration Features Summary
========================================

    In the tables below
          y   = tested and supported
          n   = not supported or not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                           C        F90    F90      C++   zlib  SZIP
                                   parallel        parallel
Solaris2.10 32-bit                   n        y      n        y     y     y
Solaris2.10 64-bit                   n        y      n        y     y     y
Windows XP                           n        y(4)   n(4)     y     y     y
Windows XP x64                       n        y(4)   n(4)     y     y     y
Windows Vista                        n        n      n        y     y     y
Mac OS X 10.5 Intel                  n        y      n        y     y     y
AIX 5.3 32- and 64-bit               n        y      n        y     y     n
FreeBSD 6.3-STABLE 32&64 bit         n        y      n        y     y     y
RedHat EL5 2.6.18-164 i686 GNU (1)W  y        y(2)   y        y     y     y
RedHat EL5 2.6.18-164 i686 Intel  W  n        y      n        y     y     n
RedHat EL5 2.6.18-164 i686 PGI    W  n        y      n        y     y     n
RedHat EL5 2.6.18-164 x86_64 GNU(1)W y        y(3)   y        y     y     y
RedHat EL5 2.6.18-164 x86_64 IntelW  n        y      n        y     y     n
RedHat EL5 2.6.18-164 x86_64 PGI  W  n        y      n        y     y     y
SuSe Linux 2.6.16 SGI Altix ia64  C  y        y      y        y     y     y
RedHat EL4 2.6.18 Xeon Lustre     C  y        y      y        y     y     n
SuSe Linux 2.4.21 ia64 Intel      C  y        y      y        y     y     n
Cray XT3 2.0.62                      y        y      y        y     y     n


Platform                           Shared  Shared    Shared    Thread-
                                   C libs  F90 libs  C++ libs  safe
Solaris2.10 32-bit                   y       y         y         y
Solaris2.10 64-bit                   y       y         y         y
Windows XP                           y       y(4)      y         y
Windows XP x64                       y       y(4)      y         y
Windows Vista                        y       n         n         y
Mac OS X 10.5                        y       n         y         n
AIX 5.3 32- and 64-bit               n       n         n         n
FreeBSD 6.3-STABLE 32&64 bit         y       y         y         y
RedHat EL5 2.6.18-164 i686 GNU (1)W  y       y(2)      y         y
RedHat EL5 2.6.18-164 i686 Intel  W  y       y         y         n
RedHat EL5 2.6.18-164 i686 PGI    W  y       y         y         n
RedHat EL5 2.6.18-164 x86_64 GNU(1)W y       y         y         y
RedHat EL5 2.6.18-164 x86_64 IntelW  y       y         y         n
RedHat EL5 2.6.18-164 x86_64 PGI  W  y       y         y         n
SuSe Linux 2.6.16 SGI Altix ia64  C  y                           n
RedHat EL4 2.6.18 Xeon Lustre     C  y       y         y         n
SuSe Linux 2.4.21 ia64 Intel      C  y       y         y         n
Cray XT3 2.0.62                      n       n         n         n

           (1) Fortran compiled with g95.
           (2) With PGI and Absoft compilers.
           (3) With PGI compiler for Fortran.
           (4) Using Visual Studio 2005 or Cygwin
    Compiler versions for each platform are listed in the preceding
    "Platforms Tested" table.


Known Problems
==============
* Parallel mode in AIX will fail some of the testcheck_version.sh tests where
  it treats "exit(134) the same as if process 0 had received an abort signal.
  This is fixed and will be available in the next release. AKC - 2009/11/3

* Some tests in tools/h5repack may fail in AIX systems when -q32 mode is used.
  The error is due to insufficient memory requested. Request a large amount
  of runtime memory by setting the following environment variable for more
  memory.
     LDR_CNTRL=MAXDATA=0x20000000@DSA
  AKC - 2009/10/31

* The PathScale MPI implementation, accessing a Panasas file system, would
  cause H5Fcreate() with H5F_ACC_EXCL to fail even when the file is not
  existing. This is due to the MPI_File_open() call failing if the amode has
  the MPI_MODE_EXCL bit set. (See bug 1468 for details.) AKC - 2009/8/11

* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO. CMC - 2009/04/28

* There is a known issue in which HDF5 will change the timestamp on a file
  simply by opening it with read/write permissions, even if the file is not
  modified in any way. This is due to the way in which HDF5 manages the file
  superblock. A fix is currently underway and should be included in the 1.8.4
  release of HDF5. MAM - 2009/04/28

* For gcc v4.3 and v4.4, with production mode, if -O3 is used, H5Tinit.c
  would fail to compile. Actually bad H5Tinit.c is produced.  If -O (same
  as -O1) is used, H5Tinit.c compiled okay but test/dt_arith would fail.
  When -O0 (no optimizatio) is used, H5Tinit.c compilete okay and all
  tests passed. Therefore, -O0 is imposed for v4.3 and v4.4 of gcc.
  AKC - 2009/04/20

* For Red Storm, a Cray XT3 system, the tools/h5ls/testh5ls.sh and
  tools/h5copy/testh5copy.sh will fail some of its sub-tests. These sub-tests
  are expected to fail and should exit with a non-zero code but the yod
  command does not propagate the exit code of the executables. Yod always
  returns 0 if it can launch the executable.  The test suite shell expects
  a non-zero for this particular test, therefore it concludes the test has
  failed when it receives 0 from yod.  Skip all the "failing" test for now
  by changing them as following.

  ======== Original tools/h5ls/testh5ls.sh =========
  TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ======== Change to ===============================
  echo SKIP TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ==================================================

  ======== Original tools/h5copy/testh5copy.sh =========
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  H5LSTEST $FILEOUT
  ======== Change to ===============================
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  echo SKIP H5LSTEST $FILEOUT
  ==================================================
  AKC - 2008/11/10

* For Red Storm, a Cray XT3 system, the yod command sometimes gives the
  message,  "yod allocation delayed for node recovery".  This interferes with
  test suites that do not expect seeing this message.  See the section of "Red
  Storm" in file INSTALL_parallel for a way to deal with this problem.
  AKC - 2008/05/28

* On Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* On mpich 1.2.5 and 1.2.6, if more than two processes contribute no IO and
  the application asks to do collective IO, we have found that when using 4
  processors, a simple collective write will sometimes be hung. This can be
  verified with t_mpi test under testpar.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  SLU - 2005/6/30

* On IBM AIX systems, parallel HDF5 mode will fail some tests with error
  messages like "INFO: 0031-XXX ...".  This is from the command `poe'.
  Set the environment variable MP_INFOLEVEL to 0 to minimize the messages
  and run the tests again.

  The tests may fail with messages like "The socket name is already in use",
  but HDF5 does not use sockets.  This failure is due to problems with the
  poe command trying to set up the debug socket.  To resolve this problem,
  check to see whether there are many old /tmp/s.pedb.* files staying around.
  These are sockets used by the poe command and left behind due to failed
  commands.  First, ask your system administrator to clean them out.
  Lastly, request IBM to provide a means to run poe without the debug socket.

* The --enable-static-exec configure flag will only statically link libraries
  if the static version of that library is present. If only the shared version
  of a library exists (i.e., most system libraries on Solaris, AIX, and Mac,
  for example, only have shared versions), the flag should still result in a
  successful compilation, but note that the installed executables will not be
  fully static. Thus, the only guarantee on these systems is that the
  executable is statically linked with just the HDF5 library.

* There is also a configure error on Altix machines that incorrectly reports
  when a version of Szip without an encoder is being used.

%%%%1.8.3%%%%


HDF5 version 1.8.3 released on Mon May  4 09:21:00 CDT 2009
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.2 and
HDF5 1.8.3, and contains information on the platforms tested and
known problems in HDF5-1.8.3.
For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.3 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.3 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.3 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.3 (current
release) versus Release 1.8.2":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for New Platforms, Languages, and Compilers
- Bug Fixes since HDF5-1.8.2
- Platforms Tested
- Supported Configuration Features Summary
- Known Problems


New Features
============

    Configuration
    -------------
    - Added libtool version numbers to generated c++, fortran, and
      hl libraries. MAM 2009/04/19.
    - Regenerated Makefile.ins using Automake 1.10.2. MAM 2009/04/19.
    - Added a Make target of check-all-install to test the correctness of
      installing via the prefix= or $DESTDIR options. AKC - 2009/04/14

    Library
    -------
    - Embed the content of libhdf5.settings into the hdf5 executables
      so that an "orphaned" executables can display (via the Unix
      strings command, for example) the library settings used to build
      the executables.  This is a prototype implementation. Improvement will
      be added in next release.  AKC - 2009/04/20
    - Separated "factory" free list class from block free lists. These free
      lists are dynamically created and manage blocks of a fixed size.
      H5set_free_list_limits() will use the same settings specified for block
      free lists for factory free lists. NAF - 2009/04/08
    - Added support for dense attributes to H5Ocopy. XCao/NAF - 2009/01/29
    - Added H5Pset_elink_cb and H5Pget_elink_cb functions to support a
      user-defined callback function for external link traversal.
      NAF - 2009/01/08
    - Added H5Pset_elink_acc_flags and H5Pget_elink_acc_flags functions to
      allow the user to specify the file access flags used to open the target
      file of an external link. NAF - 2009/01/08
    - Added H5Pset_chunk_cache() and H5Pget_chunk_cache() functions to allow
      individual rdcc configuration for each dataset.  Added
      H5Dget_access_plist() function to retrieve a dataset access property
      list from a dataset. NAF - 2008/11/12
    - Added H5Iis_valid() function to check if an id is valid without
      producing an error message. NAF - 2008/11/5
    - Added code to maintain a min_clean_fraction in the metadata cache when
      in serial mode. MAM - 2009/01/9

    Parallel Library
    ----------------
    - Modified parallel tests to run with arbitrary number of processes. The
      modified tests are testphdf5 (parallel dataset access), t_chunk_alloc
      (chunk allocation), and t_posix_compliant (posix compliance). The rest of
      the parallel tests already use in the code the number of processes
      available in the communicator. (CMC - 2009/04/28)

    Tools
    -----
    - h5diff new flag, -c, --compare, list objects that are not comparable.
      PVN - 2009/4/2 - 1368
    - h5diff new flag, -N, --nan, avoids NaNs detection. PVN - 2009/4/2
    - h5dump correctly specifies XML dtd / schema urls ADB - 2009/4/3 - 1519
    - h5repack now handles group creation order. PVN - 2009/4/2 - 1402
    - h5repack: When user doesn't specify a chunk size, h5repack now
      defines a default chunk size as the same size of the size of the
      hyperslab used to read the chunks. The size of the hyperslabs are
      defined as the size of each dimension or a predefined constant,
      whatever is smaller. This assures that the chunk read fits in the
      chunk cache. PVN - 2008/11/21

    High-Level APIs
    ---------------
    - Table: In version 3.0 of Table, the writing of the "NROWS" attribute
      (used to store number of records) was deprecated. PVN - 2008/11/24

    F90 API
    -------
    - Added for the C APIs the Fortran wrappers:
          h5dget_access_plist_f
          h5iis_valid_f
          h5pset_chunk_cache_f
          h5pget_chunk_cache_f
      MSB - 2009/04/17

    C++ API
    -------
    - None


Support for New Platforms, Languages, and Compilers
===================================================


Bug Fixes since HDF5-1.8.2
==========================

    Configuration
    -------------
    - The --includedir=DIR configuration option now works as intended, and
      can be used to specify the location to install C header files. The
      default location remains unchanged, residing at ${prefix}/include.
      MAM - 2009/03/10 - BZ #1381
    - Configure no longer removes the '-g' flag from CFLAGS when in production
      mode if it has been explicitly set in the CFLAGS environment variable
      prior to configuration. MAM - 2009/03/09 - BZ #1401

    Library
    -------
    - Added versioning to H5Z_class_t struct to allow compatibility with 1.6
      API. NAF - 2009/04/20 - 1533
    - Fixed a problem with using data transforms with non-native types in the
      file. NAF - 2009/04/20 - 1548
    - Added direct.h include file to windows section of H5private.h
      to fix _getcwd() warning. ADB - 2009/04/14 - 1536
    - Fixed a bug that prevented external links from working after calling
      H5close(). NAF - 2009/04/10 - 1539
    - Modified library to write cached symbol table information to the
      superblock, to allow library versions 1.3.0 to 1.6.3 to read files created
      by this version. NAF - 2009/04/08 - 1423
    - Changed skip lists to use a deterministic algorithm.  The library should
      now never call rand() or srand(). NAF - 2009/04/08 - 503
    - Fixed a bug where H5Lcopy and H5Lmove wouldn't create intermediate groups
      when that property was set. NAF - 2009/04/07 - 1526
    - Fixed a bug that caused files with a user block to grow by the size of the
      user block every time they were opened. NAF - 2009/03/26 - 1499
    - Fixed a rare problem that could occur with files using the old (pre 1.4)
      array datatype. NAF - 2009/03/23
    - Modified library to be able to open files with corrupt root group symbol
      table messages, and correct these errors if they are found.  Such files
      can only be successfully opened with write access. NAF - 2009/03/23 - 1189
    - Removed the long_long #define and replaced all instances with
      "long long". This caused problems with third party products. All
      currently supported compilers support the type. ADB - 2009/03/05
    - Fixed various bugs that could prevent the fill value from being written
      in certain rare cases. NAF - 2009/02/26 - 1469
    - Fixed a bug that prevented more than one dataset chunk from being cached
      at a time. NAF - 2009/02/12 - 1015
    - Fixed an assertion failure caused by opening an attribute multiple times
      through multiple file handles. NAF - 2009/02/12 - 1420
    - Fixed a problem that could prevent the user from adding attributes (or any
      object header message) in some circumstances. NAF - 2009/02/12 - 1427
    - Fixed a bug that could cause problems when an attribute was added to a
      committed datatype using the committed datatype's datatype.
      NAF - 2009/02/12
    - Fixed a bug that could cause problems when copying an object with a shared
      message in its own object header. NAF - 2009/01/29
    - Changed H5Tset_order to properly reject H5T_ORDER_NONE for most datatypes.
      NAF - 2009/01/27 - 1443
    - Fixed a bug where H5Tpack wouldn't remove trailing space from an otherwise
      packed compound type. NAF - 2009/01/14
    - Fixed up some old v2 btree assertions that get run in debug mode that
      were previously failing on compilation, and removed some of the
      more heavily outdated and non-rewritable ones. MAM - 2008/12/15
    - Fixed a bug that could cause problems when "automatically" unmounting
      multiple files. NAF - 2008/11/17
    - H5Dset_extent: when shrinking dimensions, some chunks were not deleted.
      PVN - 2009/01/8

    Parallel Library
    ----------------
    - None

    Tools
    -----
    - Fixed many problems that could occur when using h5repack with named
      datatypes. NAF - 2009/4/20 - 1516/1466
    - h5dump, h5diff, h5repack were not reading (by hyperslabs) datasets
      that have a datatype datum size greater than H5TOOLS_BUFSIZE, a constant
      defined as 1024Kb, such as array types with large dimensions.
      PVN - 2009/4/1 - 1501
    - h5import: By selecting a compression type, a big endian byte order
      was being selected. PVN - 2009/3/11 - 1462
    - zip_perf.c had missing argument on one of the open() calls. Fixed.
      AKC - 2008/12/9

    F90 API
    ------
    - None

    C++ API
    ------
    - None

    High-Level APIs:
    ------
    - Dimension scales: The scale index return value in H5DSiterate_scales
      was not always incremented. PVN - 2009/4/8 - 1538

    Fortran High-Level APIs:
    ------
    - Lite: The h5ltget_dataset_info_f function (gets information about
      a dataset) was not correctly returning the dimension array
                                   PVN - 2009/3/23


Platforms Tested
================
The following platforms and compilers have been tested for this release.

    AIX 5.3                       xlc 7.0.0.8
    (LLNL Up)                     xlf 09.01.0000.0008
                                  xlC 7.0.0.8
                                  mpcc_r 7.0.0.8
                                  mpxlf_r 09.01.0000.0008

    Cray XT3 (2.0.41)             cc (pgcc) 7.1-4
    (SNL red storm)               ftn (pgf90) 7.1-4
                                  CC (pgCC) 7.1-4

    FreeBSD 6.3-STABLE i386       gcc 3.4.6 [FreeBSD] 20060305
    (duty)                        g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.3.4 20090419
                                  g++ 4.3.4 20090419
                                  gfortran 4.3.4 20090419

    FreeBSD 6.3-STABLE amd64      gcc 3.4.6 [FreeBSD] 20060305
    (liberty)                     g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.4.1 20090421
                                  g++ 4.4.1 20090421
                                  gfortran 4.4.1 20090421

    IRIX64 6.5 (64 & n32)         MIPSpro cc 7.4.4m
                                  F90 MIPSpro 7.4.4m
                                  C++ MIPSpro cc 7.4.4m

    Linux 2.6.18-128.1.6.el5xen   gcc (GCC) 4.1.2
    #1 SMP i686 i686 i386         G95 (GCC 4.0.3 (g95 0.92!) Feb 4 2009)
    (jam)                         PGI C, Fortran, C++ 7.2-1 32-bit
                                  PGI C, Fortran, C++ 8.0-1 32-bit
                                  Intel(R) C Compiler for 32-bit
                                      applications, Versions 10.1, 11.0
                                  Intel(R) C++ Compiler for 32-bit
                                      applications, Version 10.1, 11.0
                                  Intel(R) Fortran Compiler for 32-bit
                                      applications, Version 10.1, 11.0
                                  Absoft 32-bit Fortran 95 10.0.7
                                  MPICH mpich2-1.0.8 compiled with
                                  gcc 4.1.2 and G95  (GCC 4.0.3 (g95 0.92!)

    Linux 2.6.9-42.0.10.ELsmp #1  gcc (GCC) 3.4.6
    SMP i686 i686 i386            G95 (GCC 4.0.3 (g95 0.92!) Feb 4 2009)
    (kagiso)                      MPICH mpich2-1.0.8 compiled with
                                  gcc 3.4.6 and G95  (GCC 4.0.3 (g95 0.92!)

    Linux 2.6.16.60-0.37-smp #1   gcc 4.1.2
    SMP x86_64 GNU/Linux          G95 (GCC 4.0.3 (g95 0.92!) Feb 4 2009)
    (smirom)                      Intel(R) C, C++, Fortran Compilers for
                                  applications running on Intel(R) 64,
                                  Versions 10.1, 11.0.
                                  PGI C, Fortran, C++ Version 7.2-1, 8.0-1
                                         for 64-bit target on x86-64
                                  gcc 4.1.2 and G95  (GCC 4.0.3 (g95 0.92!)
                                  MPICH mpich2-1.0.8 compiled with
                                  gcc 4.1.2 and G95 (GCC 4.0.3 (g95 0.92!)
                                  tested for both 32- and 64-bit binaries

    Linux 2.6.16.54-0.2.5 #1      Intel(R) C++ Version 10.1.017
    SGI Altix SMP ia64            Intel(R) Fortran Itanium(R) Version 10.1.017
    (cobalt)                      SGI MPI 1.38

    SunOS 5.10 32- and 64-bit     Sun WorkShop 6 update 2 C 5.9 Patch 124867-09
    (linew)                       Sun WorkShop 6 update 2 Fortran 95 8.3
                                  Patch 127000-07
                                  Sun WorkShop 6 update 2 C++ 5.8
                                  Patch 124863-11

    Intel Xeon Linux 2.6.18-      gcc 3.4.6 20060404
    92.1.10.el5_lustre.1.6.6smp-  Intel(R) C++ Version 10.0.026
    perfctr #2 SMP                Intel(R) Fortran Compiler Version 10.0.026
    (abe)                         Open MPI 1.2.2
                                  MVAPICH2-0.9.8p28p2patched-intel-ofed-1.2
                                  compiled with icc v10.0.026 and ifort 10.0.026

    IA-64 Linux 2.4.21-309.tg1    gcc (GCC) 3.2.2
    #1 SMP ia64                   Intel(R) C++ Version 8.1.037
    (NCSA tg-login)               Intel(R) Fortran Compiler Version 8.1.033
                                  mpich-gm-1.2.7p1..16-intel-8.1.037-r1

    Linux 2.6.9-55.0.9.EL_lustre  Intel(R) C, C++, Fortran Compilers for
    .1.4.11.1smp #1 SMP           applications running on Intel(R) 64,
    SMP x86_64 GNU/Linux          Versions 9.1.
    (SNL Spirit)

    Linux 2.6.9-55.0.9.EL_lustre  Intel(R) C, C++, Fortran Compilers for
    .1.4.11.1smp #1 SMP           applications running on Intel(R) 64,
    SMP x86_64 GNU/Linux          Versions 10.1.
    (SNL Thunderbird)

    Linux 2.6.18-63chaos #1 SMP   Intel(R) C, C++, Fortran Compilers for
    SMP x86_64 GNU/Linux          applications running on Intel(R) 64,
    (SNL Glory)                   Versions 10.1.

    Linux 2.6.18-63chaos #1 SMP   Intel(R) C, C++, Fortran Compilers for
    SMP x86_64 GNU/Linux          applications running on Intel(R) 64,
    (LLNL Zeus)                   Versions 9.1.
                gcc/gfortran/g++ (GCC) 4.1.2.

    Windows XP                    Visual Studio .NET
                                  Visual Studio 2005 w/ Intel Fortran 9.1
                                  Cygwin(native gcc compiler and g95)

    Windows XP x64                Visual Studio 2005 w/ Intel Fortran 9.1

    Windows Vista                 Visual Studio 2005

    MAC OS  10.5.6 (Intel)        i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1
                                  GNU Fortran (GCC) 4.3.0 20070810
                                  G95 (GCC 4.0.3 (g95 0.91!) Apr 24 2008)
                                  Intel C, C++ and Fortran compilers 10.1


Supported Configuration Features Summary
========================================

    In the tables below
          y   = tested and supported
          n   = not supported or not tested in this release
          C   = Cluster
          W   = Workstation
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                           C        F90    F90      C++   zlib  SZIP
                                   parallel        parallel
Solaris2.10 32-bit                   n        y      n        y     y     y
Solaris2.10 64-bit                   n        y      n        y     y     y
IRIX64_6.5 32-bit                    n        n      n        n     y     y
IRIX64_6.5 64-bit                    n        y      y        y     y     y
Windows XP                           n        y(4)   n(4)     y     y     y
Windows XP x64                       n        y(4)   n(4)     y     y     y
Windows Vista                        n        n      n        y     y     y
Mac OS X 10.5 Intel                  n        y      n        y     y     y
AIX 5.3 32- and 64-bit               n        y      n        y     y     n
FreeBSD 6.3-STABLE 32&64 bit         n        y      n        y     y     y
RedHat EL4 2.6.9-42 i686 GNU (1)  W  y        y      y        y     y     y
RedHat EL5 2.6.18-128 i686 GNU (1)W  y        y(2)   y        y     y     y
RedHat EL5 2.6.18-128 i686 Intel  W  n        y      n        y     y     n
RedHat EL5 2.6.18-128 i686 PGI    W  n        y      n        y     y     n
SuSe Linux 2.6.16 x86_64 GNU (1)  W  y        y(3)   y        y     y     y
SuSe Linux 2.6.16 x86_64 Intel    W  n        y      n        y     y     n
SuSe Linux 2.6.16 x86_64 PGI      W  n        y      n        y     y     y
SuSe Linux 2.6.16 SGI Altix ia64  C  y        y      y        y     y     y
RedHat EL4 2.6.18 Xeon Lustre     C  y        y      y        y     y     n
SuSe Linux 2.4.21 ia64 Intel      C  y        y      y        y     y     n
Cray XT3 2.0.41                      y        y      y        y     y     n


Platform                           Shared  Shared    Shared    Thread-
                                   C libs  F90 libs  C++ libs  safe
Solaris2.10 32-bit                   y       y         y         y
Solaris2.10 64-bit                   y       y         y         y
IRIX64_6.5 32-bit                    y       dna       y         y
IRIX64_6.5 64-bit                    y       y         n         y
Windows XP                           y       y(4)      y         y
Windows XP x64                       y       y(4)      y         y
Windows Vista                        y       n         n         y
Mac OS X 10.5                        y       n         y         n
AIX 5.3 32- and 64-bit               n       n         n         n
FreeBSD 6.3-STABLE 32&64 bit         y       n         y         y
RedHat EL4 2.6.9-42 i686 GNU (1)  W  y       y         y         y
RedHat EL5 2.6.18-128 i686 GNU (1)W  y       y(2)      y         y
RedHat EL5  2.6.18-128 i686 Intel W  y       y         y         n
RedHat EL5 2.6.18-128 i686 PGI    W  y       y         y         n
SuSe Linux 2.6.16 x86_64 GNU (1)  W  y       y         y         y
SuSe Linux 2.6.16 x86_64 Intel    W  y       y         y         n
SuSe Linux 2.6.16 x86_64 PGI      W  y       y         y         n
SuSe Linux 2.6.16 SGI Altix ia64  C  y                           n
RedHat EL4 2.6.18 Xeon Lustre     C  y       y         y         n
SuSe Linux 2.4.21 ia64 Intel      C  y       y         y         n
Cray XT3 2.0.41                      n       n         n         n

           (1) Fortran compiled with g95.
           (2) With PGI and Absoft compilers.
           (3) With PGI compiler for Fortran.
           (4) Using Visual Studio 2005 or Cygwin
    Compiler versions for each platform are listed in the preceding
    "Platforms Tested" table.


Known Problems
==============
* Parallel tests failed with 16 processes with data inconsistency at testphdf5
  / dataset_readAll. Parallel tests also failed with 32 and 64 processes with
  collective abort of all ranks at t_posix_compliant / allwrite_allread_blocks
  with MPI IO. CMC - 2009/04/28

* There is a known issue in which HDF5 will change the timestamp on a file
  simply by opening it with read/write permissions, even if the file is not
  modified in any way. This is due to the way in which HDF5 manages the file
  superblock. A fix is currently underway and should be included in the 1.8.4
  release of HDF5. MAM - 2009/04/28

* For gcc v4.3 and v4.4, with production mode, if -O3 is used, H5Tinit.c
  would fail to compile. Actually bad H5Tinit.c is produced.  If -O (same
  as -O1) is used, H5Tinit.c compiled okay but test/dt_arith would fail.
  When -O0 (no optimizatio) is used, H5Tinit.c compilete okay and all
  tests passed. Therefore, -O0 is imposed for v4.3 and v4.4 of gcc.
  AKC - 2009/04/20

* For Red Storm, a Cray XT3 system, the tools/h5ls/testh5ls.sh and
  tools/h5copy/testh5copy.sh will fail some of its sub-tests. These sub-tests
  are expected to fail and should exit with a non-zero code but the yod
  command does not propagate the exit code of the executables. Yod always
  returns 0 if it can launch the executable.  The test suite shell expects
  a non-zero for this particular test, therefore it concludes the test has
  failed when it receives 0 from yod.  Skip all the "failing" test for now
  by changing them as following.

  ======== Original tools/h5ls/testh5ls.sh =========
  TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ======== Change to ===============================
  echo SKIP TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ==================================================

  ======== Original tools/h5copy/testh5copy.sh =========
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  H5LSTEST $FILEOUT
  ======== Change to ===============================
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  echo SKIP H5LSTEST $FILEOUT
  ==================================================
  AKC - 2008/11/10

* For Red Storm, a Cray XT3 system, the yod command sometimes gives the
  message,  "yod allocation delayed for node recovery".  This interferes with
  test suites that do not expect seeing this message.  See the section of "Red
  Storm" in file INSTALL_parallel for a way to deal with this problem.
  AKC - 2008/05/28

* We have discovered two problems when running collective IO parallel HDF5
  tests with chunking storage on the ChaMPIon MPI compiler on tungsten, a
  Linux cluster at NCSA.

  Under some complex selection cases:
  1) MPI_Get_element returns the wrong value.
  2) MPI_Type_struct also generates the wrong derived datatype and corrupt
     data may be generated.
  These issues arise only when turning on collective IO with chunking storage
  with some complex selections. We have not found these problems on other
  MPI-IO compilers. If you encounter these problems, you may use independent
  IO instead.

  To avoid this behavior, change the following line in your code
      H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_COLLECTIVE);
  to
      H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_INDEPENDENT);
  KY - 2007/08/24

* On Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* For LLNL, uP: both serial and parallel tests pass.
  Zeus: Serial tests pass but parallel tests fail with a known problem in MPI.
  ubgl: Serial tests pass but parallel tests fail.

* On mpich 1.2.5 and 1.2.6, if more than two processes contribute no IO and
  the application asks to do collective IO, we have found that when using 4
  processors, a simple collective write will sometimes be hung. This can be
  verified with t_mpi test under testpar.

* On IRIX6.5, when the C compiler version is greater than 7.4, complicated
  MPI derived datatype code will work. However, the user should increase
  the value of the MPI_TYPE_MAX environment variable to some appropriate value
  to use collective irregular selection code.  For example, the current
  parallel HDF5 test needs to raise MPI_TYPE_MAX to 200,000 to pass the test.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  SLU - 2005/6/30

* On IBM AIX systems, parallel HDF5 mode will fail some tests with error
  messages like "INFO: 0031-XXX ...".  This is from the command `poe'.
  Set the environment variable MP_INFOLEVEL to 0 to minimize the messages
  and run the tests again.

  The tests may fail with messages like "The socket name is already in use",
  but HDF5 does not use sockets.  This failure is due to problems with the
  poe command trying to set up the debug socket.  To resolve this problem,
  check to see whether there are many old /tmp/s.pedb.* files staying around.
  These are sockets used by the poe command and left behind due to failed
  commands.  First, ask your system administrator to clean them out.
  Lastly, request IBM to provide a means to run poe without the debug socket.

* The --enable-static-exec configure flag fails to compile for Solaris
  platforms. This is due to the fact that not all of the system libraries on
  Solaris are available in a static format.

  The --enable-static-exec configure flag also fails to correctly compile
  on IBM SP2 platforms for serial mode. The parallel mode works fine with
  this option.

  It is suggested that you do not use this option on these platforms
  during configuration.

* There is also a configure error on Altix machines that incorrectly reports
  when a version of Szip without an encoder is being used.

* Information about building with PGI and Intel compilers is available in
  the INSTALL file sections 4.7 and 4.8.


%%%%1.8.2%%%%


HDF5 version 1.8.2 released on Mon Nov 10 15:43:09 CST 2008
================================================================================

INTRODUCTION
============

This document describes the differences between HDF5-1.8.1 and HDF5 1.8.2,
and contains information on the platforms tested and known problems in
HDF5-1.8.2. For more details, see the files HISTORY-1_0-1_8_0_rc3.txt
and HISTORY-1_8.txt in the release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.2 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.2 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.2 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.2 (current
release) versus Release 1.8.1":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for new platforms and languages
- Bug Fixes since HDF5-1.8.1
- Platforms Tested
- Supported Configuration Features Summary
- Known Problems


New Features
============

        Configuration
        -------------
        - Upgraded libtool to version 2.2.6a. (MAM - 2008/10/15).

        Library
        -------
        - Added two new public routines: H5Pget_elink_fapl() and
            H5Pset_elink_fapl(). (see bug #1247) (VC - 2008/10/13)
        - Improved free space tracking in file to be faster. (QAK - 2008/10/06)
        - Added 'mounted' field to H5G_info_t struct. (QAK - 2008/07/15)

        Parallel Library
        ----------------
        - None

        Tools
        -----
        - h5repack: added new options -u and -b to add a userblock to an HDF5
          file during the repack.  (PVN - 2008/08/26)
        - h5repack: added options -t and -a to call H5Pset_alignment while
          creating a repacked file. (PVN - 2008/08/29)
        - h5ls: added capability to traverse through external links when the -r
          (recursive) flag is given. (NAF - 2008/09/16)
        - h5ls: added -E option to enable traversal of external links.
          h5ls will not traverse external links without this flag being set.
            (NAF - 2008/10/06)
        - h5dump: when -b flag is used without a keyword after it, binary
          output defaults to NATIVE. MEMORY keyword was deprecated
          and replaced by NATIVE keyword. (PVN - 2008/10/30)
        - h5diff: returns 1 when file graphs differ by any object.
          Error return code was changed to 2 from -1.  (PVN - 2008/10/30)
        - h5import: TEXTFPE (scientific format) was deprecated. Use TEXTFP
          instead (PVN - 2008/10/30)



        F90 API
        ------
        - Added optional parameter 'mounted' to H5Gget_info_f,
          H5Gget_info_by_idx_f, H5Gget_info_by_name_f (MSB - 2008/09/24)
        - Added H5Tget_native_type_f (MSB - 2008/09/30)


        C++ API
        ------
        - These member functions were added as wrapper for H5Rdereference to
          replace the incorrect IdComponent::dereference().
             void H5Object::dereference(H5Object& obj, void* ref,
                                        H5R_type_t ref_type=H5R_OBJECT)
             void H5Object::dereference(H5File& h5file, void* ref,
                                        H5R_type_t ref_type=H5R_OBJECT)
             void H5Object::dereference(Attribute& obj, void* ref,
                                        H5R_type_t ref_type=H5R_OBJECT)

          In addition, these constructors were added to create the associated
          objects by way of dereference:
             DataSet(H5Object& obj, void* ref, H5R_type_t ref_type=H5R_OBJECT)
             DataSet(H5File& file, void* ref, H5R_type_t ref_type=H5R_OBJECT)
             DataSet(Attribute& attr, void* ref, H5R_type_t ref_type=H5R_OBJECT)
             Group(H5Object& obj, void* ref, H5R_type_t ref_type=H5R_OBJECT)
             Group(H5File& obj, void* ref, H5R_type_t ref_type=H5R_OBJECT)
             Group(Attribute& attr, void* ref, H5R_type_t ref_type=H5R_OBJECT)
             DataType(H5Object& obj, void* ref, H5R_type_t ref_type=H5R_OBJECT)
             DataType(H5File& file, void* ref, H5R_type_t ref_type=H5R_OBJECT)
             DataType(Attribute& attr, void* ref, H5R_type_t ref_type=H5R_OBJECT)
          (BMR - 2008/10/29)


Support for New Platforms, Languages, and Compilers
===================================================
        - Intel 10.1 is supported on Mac OS X 10.5.4.
          Note:
          When Fortran is enabled, configure automatically
          disables the build of shared libraries (i.e., only
          static C and C++ HDF5 libraries will be built
          along with the static HDF5 Fortran library).
          Intel 10.1 C and C++ compilers require
          "-no-multibyte-chars" compilation flag due to the known
          bug in the compilers.
            (EIP - 2008/10/30)


Bug Fixes since HDF5-1.8.1
==========================

        Configuration
        -------------
        - Fixed error with 'make check install' failing due to h5dump
          needing other tools built first. (MAM - 2008/10/15).
        - When using shared szip, it is no longer necessary to specify
          the path to the shared szip libraries in LD_LIBRARY_PATH.
           (MAM - 2008/10/15).
        - The file libhdf5_fortran.settings is not installed since its content
          is included in libhdf5.settings now. (AKC - 2008/10/21)
        - "make DESTDIR=xxx install" failed to install some tools and files
          (e.g., h5cc and fortran modules). Fixed. (AKC - 2008/10/8).

        Library
        -------
        - H5Ovisit and H5Ovisit_by_name will now properly terminate when the
            callback function returns a positive value on the starting object.
            (NAF - 2008/11/03)
        - Fixed an error where a null message could be created that was larger
            than could be written to the file.  (NAF - 2008/10/23)
        - Corrected error with family/split/multi VFD not updating driver info
            when "latest" version of the file format used. (QAK - 2008/10/14)
        - Corrected alignment+threshold errors to work correctly when metadata
            aggregation is enabled. (QAK - 2008/10/06)
        - Changed H5Fget_obj_count and H5Fget_obj_ids to ignore objects
            registered by the library for internal library use.
            (NAF - 2008/10/06)
        - Fixed potential memory leak during compound conversion.
            (NAF - 2008/10/06)
        - Changed the return value of H5Fget_obj_count from INT to SSIZE_T.
            Also changed the return value of H5Fget_obj_ids from HERR_T to
            SSIZE_T and the type of the parameter MAX_OBJS from INT to SIZE_T.
            (SLU - 2008/09/26)
        - Fixed an issue that could cause data to be improperly overwritten
            during compound type conversion.  (NAF - 2008/09/19)
        - Fixed pointer alignment violations that could occur during vlen
            conversion.  (NAF - 2008/09/16)
        - Fixed problem where library could cause a segmentation fault when
            an invalid location ID was given to H5Giterate(). (QAK - 2008/08/19)
        - Fixed improper shutdown when objects have reference count > 1.  The
            library now tracks reference count due to the application separately
            from that due to internal library routines.  (NAF - 2008/08/19)
        - Fixed assertion failure caused by incorrect array datatype version.
            (NAF - 2008/08/08)
        - Fixed an issue where mount point traversal would fail when using
            multiple handles for the child.  (NAF - 2008/08/07)
        - Fixed an issue where mount points were inaccessible when using
            multiple file handles for the parent. The mount table is now in
            the shared file structure (the parent pointer is still in the
            top structure).  (NAF - 2008/08/07)
        - Fixed assertion failure caused by incorrect array datatype version.
            (NAF - 2008/08/04)
        - Fixed issue where a group could have a file mounted on it twice.
            (QAK - 2008/07/15)
        - When an attribute was opened twice and data was written with
            one of the handles, the file didn't have the data. It happened
            because each handle had its own object structure, and the empty
            one overwrote the data with fill value.  This is fixed by making
            some attribute information like the data be shared in the
            attribute structure.  (SLU - 2008/07/07)
        - Fixed a Windows-specific issue in the ohdr test which was causing
            users in some timezones to get false errors. This a deficiency in
            the Windows mktime() function, and has been handled properly.
            (SJW  - 2008/06/19)

        Parallel Library
        ----------------
        - None

        Tools
        -----
        - h5dump now checks for uniqueness of committed datatypes.
            (NAF - 2008/10/15)
        - Fixed unnecessary indentation of committed datatypes in h5dump.
            (NAF - 2008/10/15)
        - Fixed bugs in h5stat: segmemtation fault when printing groups and
            print warning message when traversal of objects is unsuccessful.
            (see bug #1253) (VC- 2008/10/13)
        - Fixed bug in h5ls that prevented relative group listings (like
            "h5ls foo.h5/bar") from working correctly (QAK - 2008/06/03)
        - h5dump: when doing binary output (-b), the stdout printing of
             attributes was done incorrectly. Removed printing of attributes
             when doing binary output. (PVN - 2008/06/05)


        F90 API
        ------
        - h5sselect_elements_f: Added additional operators H5S_SELECT_APPEND
            and H5S_SELECT_PREPEND (MSB - 2008/09/30)
        - h5sget_select_elem_pointlist: Fixed list of returned points by
            rearranging the point list correctly by accounting for C
            conventions. (MSB - 2008/09/30)
        - h5sget_select_hyper_blocklist_f: Fixed error in transposed dimension
            of arrays.(MSB - 2008/9/30)
        - h5sget_select_bounds_f: Swapped array bounds to account for C and
            Fortran reversed array notation (MSB - 2008/9/30)
        - Changed to initializing string to a blank character instead of a
            null type in tH5P.f90 to fix compiling error using AIX 5.3.0
            (MSB - 2008/7/29)
        - Fixed missing commas in H5test_kind.f90 detected by NAG compiler
            (MSB - 2008/7/29)
        - Fixed passing and array to a scalar in tH5A_1_8.f90 detected by
            NAG compiler (MSB - 2008/7/29)
        - Added the ability of the test programs to use the status of
            HDF5_NOCLEANUP to determine if the *.h5 files should be removed
            or not after the tests are completed (MSB - 2008/10/1)
        - In nh5tget_offset_c: (MSB 9/12/2008)
           If offset was equal to 0 it returned the error code of -1,
           this was changed to return an error code of -1 when the offset
           value is < 0.
        - Uses intrinsic Fortran function SIZEOF if available when detecting
           type of INTEGERs and REALs in H5test_kind.f90 (MSB - 2008/9/3)
        - Put the DOUBLE PRECISION interfaces in a separate module and
           added a USE statement for the module. The interfaces are
           included/excluded depending on the state of FORTRAN_DEFAULT_REAL
           is DBLE_F which detects if the default REAL is DOUBLE PRECISION.
           This allows the library to be compiled with -r8 Fortran flag
           without the user needing to edit the source code.
           (MSB - 200/8/27)
        - Enable building shared library for fortran by adding the flag -fPIC
          to the compile flags for versions of Intel Fortran compiler >=9
           (MSB  - 2008/8/26)

        C++ API
        ------
        - Fixed a design bug which allowed an Attribute object to create/modify
          attributes (bugzilla #1068).  The API class hierarchy was revised
          to address the problem.  Classes AbstractDS and Attribute are moved
          out of H5Object.  Class Attribute now multiply inherits from
          IdComponent and AbstractDs and class DataSet from H5Object and
          AbstractDs.  In addition, the data member IdComponent::id was
          moved into subclasses: Attribute, DataSet, DataSpace, DataType,
          H5File, Group, and PropList. (BMR - 2008/05/20)
        - IdComponent::dereference was incorrect and replaced as described
          in "New Features" section.
          (BMR - 2008/10/29)


Platforms Tested
================
The following platforms and compilers have been tested for this release.

    AIX 5.3              xlc 7.0.0.8
                xlf 09.01.0000.0008
                xlC 7.0.0.8
                mpcc_r 7.0.0.8
                mpxlf_r 09.01.0000.0008

    Cray XT3 (2.0.41)             cc (pgcc) 7.1-4
    (red storm)                   ftn (pgf90) 7.1-4
                CC (pgCC) 7.1-4

    FreeBSD 6.3-STABLE i386       gcc 3.4.6 [FreeBSD] 20060305
    (duty)                        g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.2.5 20080702
                                  g++ 4.2.5 20080702
                                  gfortran 4.2.5 20080702

    FreeBSD 6.3-STABLE amd64      gcc 3.4.6 [FreeBSD] 20060305
    (liberty)                     g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.2.5 20080702
                                  g++ 4.2.5 20080702
                                  gfortran 4.2.5 20080702

    IRIX64 6.5 (64 & n32)         MIPSpro cc 7.4.4m
                                  F90 MIPSpro 7.4.4m
                                  C++ MIPSpro cc 7.4.4m

    Linux 2.6.9-42.0.10.ELsmp #1  gcc (GCC) 3.4.6
    SMP i686 i386                 G95 (GCC 4.0.3 (g95 0.92!) April 18 2007)
    (kagiso)                      PGI C, Fortran, C++ 7.2-1 32-bit
                                  Intel(R) C Compiler for 32-bit
                                      applications, Version 10.1
                                  Intel(R) C++ Compiler for 32-bit
                                      applications, Version 10.1
                                  Intel(R) Fortran Compiler for 32-bit
                                      applications, Version 10.1
                                  Absoft 32-bit Fortran 95 10.0.4
                                  MPICH mpich-1.2.7 compiled with
                                  gcc 3.4.6 and G95  (GCC 4.0.3 (g95 0.92!)
                                  MPICH mpich2-1.0.6p1 compiled with
                                  gcc 3.4.6 and G95 (GCC 4.0.3 (g95 0.92!)

    Linux 2.6.16.46-0.14-smp #1   Intel(R) C++ for Intel(R) EM64T
    SMP x86_64 GNU/Linux          Ver.  10.1.013
    (smirom)                      Intel(R) Fortran Intel(R) EM64T
                                  Ver.  10.1.013
                                  PGI C, Fortran, C++ Version 7.2-1
                                         for 64-bit target on x86-64
                                  MPICH mpich-1.2.7 compiled with
                                  gcc 4.1.2 and G95  (GCC 4.0.3 (g95 0.92!)
                                  MPICH mpich2-1.0.7 compiled with
                                  gcc 4.1.2 and G95 (GCC 4.0.3 (g95 0.92!)
                                  tested for both 32- and 64-bit binaries

    Linux 2.6.16.54-0.2.5 #1      Intel(R) C++ Version 10.1.017
    Altix SMP ia64                Intel(R) Fortran Itanium(R) Version 10.1.017
    (cobalt)                      SGI MPI 1.16

    SunOS 5.10 32- and 64-bit     Sun WorkShop 6 update 2 C 5.8
    (linew)                       Sun WorkShop 6 update 2 Fortran 95 8.2
                                  Sun WorkShop 6 update 2 C++ 5.8
                                  Patch 121019-06

    Xeon Linux 2.6.9-42.0.10.EL_lustre-1.4.10.1smp
    (abe)                         Intel(R) C++ Version 10.0.026
                                  Intel(R) Fortran Compiler Version 10.0.026
                                  Open MPI 1.2.2
                                  MVAPICH2-0.9.8p28p2patched-intel-ofed-1.2
                                  compiled with icc v10.0.026 and
                                  ifort 10.0.026

    IA-64 Linux 2.4.21-309.tg1 #1 SMP
        ia64                      gcc (GCC) 3.2.2
    (NCSA tg-login)               Intel(R) C++ Version 8.1.037
                                  Intel(R) Fortran Compiler Version 8.1.033
                                  mpich-gm-1.2.7p1..16-intel-8.1.037-r1

    Intel 64 Linux 2.6.9-42.0.10.EL_lustre-1.4.10.1smp
    (abe)                         gcc 3.4.6 20060404
                                  Intel(R) C++ Version 10.0
                                  Intel (R) Fortran Compiler Version 10.0
                                  mvapich2-0.9.8p2patched-intel-ofed-1.2

    Windows XP                    Visual Studio .NET
                                  Visual Studio 2005 w/ Intel Fortran 9.1
                                  Cygwin(native gcc compiler and g95)

    Windows XP x64                Visual Studio 2005 w/ Intel Fortran 9.1

    Windows Vista                 Visual Studio 2005

    MAC OS  10.5.4 (Intel)        i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1
                                  GNU Fortran (GCC) 4.3.0 20070810
                                  G95 (GCC 4.0.3 (g95 0.91!) Apr 24 2008)
                                  Intel C, C++ and Fortran compilers 10.1


Supported Configuration Features Summary
========================================

    In the tables below
          y   = tested and supported
          n   = not supported or not tested in this release
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                 C        F90    F90      C++   zlib  SZIP
                         parallel        parallel
Solaris2.10 32-bit       n        y      n        y     y     y
Solaris2.10 64-bit       n        y      n        y     y     y
IRIX64_6.5 32-bit        n        n      n        n     y     y
IRIX64_6.5 64-bit        n        y      y        y     y     y
Windows XP               n        y(15)  n(15)    y     y     y
Windows XP x64           n        y(15)  n(15)    y     y     y
Windows Vista            n        n      n        y     y     y
Mac OS X 10.5 Intel      n        y      n        y     y     y
AIX 5.3 32- and 64-bit   n        y      n        y     y     n
FreeBSD 6.3-STABLE
32&64 bit                n        y      n        y     y     y
RedHat EL4       (3)  W  y(1)     y(10)  y(1)     y     y     y
RedHat EL4 Intel (3)  W  n        y      n        y     y     n
RedHat EL4 PGI   (3)  W  n        y      n        y     y     n
SuSe x86_64 gcc(3,12) W  y(2)     y(11)  y(2)     y     y     y
SuSe x86_64 Int(3,12) W  n        y(13)  n        y     y     n
SuSe x86_64 PGI(3,12) W  n        y(8)   n        y     y     y
Linux 2.6 SuSE ia64   C
    Intel       (3,7)    y        y      y        y     y     n
Linux 2.6 SGI Altix
    ia64 Intel    (3)    y        y      y        y     y     y
Linux 2.6 RHEL        C
    Lustre Intel  (5)    y(4)     y      y(4)     y     y     n
Cray XT3 2.0.41          y        y      y        y     y     n


Platform                 Shared  Shared    Shared    Thread-
                         C libs  F90 libs  C++ libs  safe
Solaris2.10 32-bit       y       y         y         y
Solaris2.10 64-bit       y       y         y         y
IRIX64_6.5 32-bit        y       dna       y         y
IRIX64_6.5 64-bit        y       y         n         y
Windows XP               y       y(15)     y         y
Windows XP x64           y       y(15)     y         y
Windows Vista            y       n         n         y
Mac OS X 10.5            y       n         y         n
AIX 5.3 32- and 64-bit   n       n         n         n
FreeBSD 6.2 32&64 bit    y       n         y         y
RedHat EL4       (3)  W  y       y(10)     y         y
RedHat EL4 Intel (3)  W  y       y         y         n
RedHat EL4 PGI   (3)  W  y       y         y         n
SuSe x86_64 GNU(3,12) W  y       y         y         y
SuSe x86_64 Int(3,12) W  y       y         y         n
SuSe x86_64 PGI(3,12) W  y       y         y         n
Linux 2.4 SuSE        C
    ia64 C Intel (7)     y       y         y         n
Linux 2.4 SGI Altix   C
    ia64 Intel           y                           n
Linux 2.6 RHEL        C
    Lustre Intel (5)     y       y         y         n
Cray XT3 2.0.41          n       n         n         n

    Notes: (1)  Using mpich2 1.0.6.
           (2)  Using mpich2 1.0.7.
           (3)  Linux 2.6 with GNU, Intel, and PGI compilers, as indicated.
                  W or C indicates workstation or cluster, respectively.
           (4)  Using mvapich2 0.9.8.
           (5)  Linux 2.6.9-42.0.10.  Xeon cluster with ELsmp_perfctr_lustre
                  and Intel compilers
           (6)  Linux 2.4.21-32.0.1.  Xeon cluster with ELsmp_perfctr_lustre
                  and Intel compilers
           (7)  Linux 2.4.21, SuSE_292.till.  Ia64 cluster with Intel compilers
           (8)  pgf90
           (9)  With Compaq Visual Fortran 6.6c compiler.
           (10) With PGI and Absoft compilers.
           (11) PGI and Intel compilers for both C and Fortran
           (12) AMD Opteron x86_64
           (13) ifort
           (14) Yes with C and Fortran, but not with C++
           (15) Using Visual Studio 2005 or Cygwin
           (16) Not tested for this release.
    Compiler versions for each platform are listed in the preceding
    "Platforms Tested" table.


Known Problems
==============
* For Red Storm, a Cray XT3 system, the tools/h5ls/testh5ls.sh and
  tools/h5copy/testh5copy.sh will fail some of its sub-tests. These sub-tests
  are expected to fail and should exit with a non-zero code but the yod
  command does not propagate the exit code of the executables. Yod always
  returns 0 if it can launch the executable.  The test suite shell expects
  a non-zero for this particular test, therefore it concludes the test has
  failed when it receives 0 from yod.  Skip all the "failing" test for now
  by changing them as following.

  ======== Original tools/h5ls/testh5ls.sh =========
  TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ======== Change to ===============================
  echo SKIP TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ==================================================

  ======== Original tools/h5copy/testh5copy.sh =========
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  H5LSTEST $FILEOUT
  ======== Change to ===============================
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d grp_rename
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -v -s grp_dsets  -d /grp_rename/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_dsets -d /E/F/grp_dsets
  echo SKIP TOOLTEST_FAIL -i $TESTFILE -o $FILEOUT -vp -s /grp_nested -d /G/H/grp_nested
  echo SKIP H5LSTEST $FILEOUT
  ==================================================
  AKC - 2008/11/10

* For Red Storm, a Cray XT3 system, the yod command sometimes gives the
  message,  "yod allocation delayed for node recovery".  This interferes with
  test suites that do not expect seeing this message.  See the section of "Red
  Storm" in file INSTALL_parallel for a way to deal with this problem.
  AKC - 2008/05/28

* We have discovered two problems when running collective IO parallel HDF5
  tests with chunking storage on the ChaMPIon MPI compiler on tungsten, a
  Linux cluster at NCSA.

  Under some complex selection cases:
  1) MPI_Get_element returns the wrong value.
  2) MPI_Type_struct also generates the wrong derived datatype and corrupt
     data may be generated.
  These issues arise only when turning on collective IO with chunking storage
  with some complex selections. We have not found these problems on other
  MPI-IO compilers. If you encounter these problems, you may use independent
  IO instead.

  To avoid this behavior, change the following line in your code
      H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_COLLECTIVE);
  to
      H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_INDEPENDENT);

  KY - 2007/08/24

* On Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* For LLNL, uP: both serial and parallel tests pass.
  Zeus: Serial tests pass but parallel tests fail with a known problem in MPI.
  ubgl: Serial tests pass but parallel tests fail.

* On mpich 1.2.5 and 1.2.6, if more than two processes contribute no IO and
  the application asks to do collective IO, we have found that when using 4
  processors, a simple collective write will sometimes be hung. This can be
  verified with t_mpi test under testpar.

* On IRIX6.5, when the C compiler version is greater than 7.4, complicated
  MPI derived datatype code will work. However, the user should increase
  the value of the MPI_TYPE_MAX environment variable to some appropriate value
  to use collective irregular selection code.  For example, the current
  parallel HDF5 test needs to raise MPI_TYPE_MAX to 200,000 to pass the test.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  SLU - 2005/6/30

* On IBM AIX systems, parallel HDF5 mode will fail some tests with error
  messages like "INFO: 0031-XXX ...".  This is from the command `poe'.
  Set the environment variable MP_INFOLEVEL to 0 to minimize the messages
  and run the tests again.

  The tests may fail with messages like "The socket name is already in use",
  but HDF5 does not use sockets.  This failure is due to problems with the
  poe command trying to set up the debug socket.  To resolve this problem,
  check to see whether there are many old /tmp/s.pedb.* files staying around.
  These are sockets used by the poe command and left behind due to failed
  commands.  First, ask your system administrator to clean them out.
  Lastly, request IBM to provide a means to run poe without the debug socket.

* The --enable-static-exec configure flag fails to compile for Solaris
  platforms. This is due to the fact that not all of the system libraries on
  Solaris are available in a static format.

  The --enable-static-exec configure flag also fails to correctly compile
  on IBM SP2 platforms for serial mode. The parallel mode works fine with
  this option.

  It is suggested that you do not use this option on these platforms
  during configuration.

* There is also a configure error on Altix machines that incorrectly reports
  when a version of Szip without an encoder is being used.

* Information about building with PGI and Intel compilers is available in
  the INSTALL file sections 4.7 and 4.8.




%%%%1.8.1%%%%


HDF5 version 1.8.1 released on Thu May 29 15:28:55 CDT 2008
================================================================================

INTRODUCTION
============

This document describes the differences between the HDF5-1.8.1 release
and HDF5 1.8.0, and contains information on the platforms tested and known
problems in HDF5-1.8.1.  For more details, see the files
HISTORY-1_0-1_8_0_rc3.txt and HISTORY-1_8.txt in the release_docs/ directory
of the HDF5 source.

Links to the HDF5 1.8.1 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.1 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.1 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in the HDF5-1.8.x release series, including brief general
descriptions of some new and modified APIs, are described in the "What's New
in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.1 (current
release) versus Release 1.8.0":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Support for new platforms and languages
- Bug Fixes since HDF5-1.8.0
- Platforms Tested
- Supported Configuration Features Summary
- Known Problems


New Features
============

        Configuration
        -------------
        - The lib/libhdf5.settings file contains much more configure
          information. (AKC - 2008/05/18)

        - The new configure option "--disable-sharedlib-rpath" disables
          embedding the '-Wl,-rpath' information into executables when
          shared libraries are produced, and instead solely relies on the
          information in LD_LIBRARY_PATH. (MAM - 2008/05/15)

        - Configuration suite now uses Autoconf 2.61, Automake 1.10.1, and
          Libtool 2.2.2 (MAM - 2008/05/01)

        Source code distribution
        ========================

        Library
        -------
        - None

        Parallel Library
        ----------------
        - None

        Tools
        -----
        - h5repack: Reinstated the -i and -o command line flags to specify
          input and output files.  h5repack now understands both the old
          syntax (with -i and -o) and the new syntax introduced in Release
          1.8.0.  (PVN - 2008/05/23)
        - h5dump: Added support for external links, displaying the object that
          an external link points to. (PVN - 2008/05/12)
        - h5dump: Added an option, -m, to allow user-defined formatting in the
          output of floating point numbers. (PVN - 2008/05/06)
        - h5dump, in output of the -p option: Added effective data compression
          ratio to the dataset storage layout output when a compression filter
          has been applied to a dataset.  (PVN - 2008/05/01)

        F90 API
        ------
        - New H5A, H5G, H5L, H5O, and H5P APIs to enable 1.8 features were
          added. See "Release 1.8.1 (current release) versus Release 1.8.0" in
          the document "HDF5 Software Changes from Release to Release"
          (http://hdfgroup.org/HDF5/doc/ADGuide/Changes.html) for the
          complete list of the new APIs.

        C++ API
        ------
        - None


Support for New Platforms, Languages, and Compilers
===================================================
        - Both serial and parallel HDF5 are supported for the Red Storm machine
          which is a Cray XT3 system.

        - The Fortran library will work correctly if compiled with the -i8
          flag.  This has been tested with the g95, PGI and Intel Fortran
          compilers.


Bug Fixes since HDF5-1.8.0
==========================

        Configuration
        -------------
        - None

        Source code distribution
        ========================

        Library
        -------
        - Chunking:  Chunks greater than 4GB are disallowed.
          (QAK - 2008/05/16)
        - Fixed the problem with searching for a target file when following
          an external link.  The search pattern will depend on whether the
          target file's pathname is an absolute or a relative path.
          Please see the H5Lcreate_external description in the "HDF5
          Reference Manual" (http://hdfgroup.org/HDF5/doc/RM/RM_H5L.html).
          (VC - 2008/04/08)
        - Fixed possible file corruption bug when encoding datatype
          descriptions for compound datatypes whose size was between
          256 and 511 bytes and the file was opened with the "use the
          latest format" property enabled (with H5Pset_libver_bounds).
          (QAK - 2008/03/13)
        - Fixed bug in H5Aget_num_attrs() routine to correctly handle an
          invalid location identifier.  (QAK - 2008/03/11)

        Parallel Library
        ----------------
        - None

        Tools
        -----
        - Fixed bug in h5diff that prevented datasets and attributes with
          variable-length string elements from comparing correctly.
          (QAK - 2008/02/28)
        - Fixed bug in h5dump that caused binary output to be made only for
          the first dataset, when several datasets were requested.
          (PVN - 2008/04/07)

        F90 API
        ------
        - The h5tset(get)_fields subroutines were missing the parameter to
          specify a sign position; fixed.  (EIP - 2008/05/23)
        - Many APIs were fixed to work with the 8-byte integers in Fortran vs.
          4-byte integers in C. This change is transparent to user applications.

        C++ API
        ------
        - The class hierarchy was revised to address the problem reported
          in bugzilla #1068, Attribute should not be derived from base
          class H5Object.  Classes AbstractDS was moved out of H5Object.
          Class Attribute now multiply inherits from IdComponent and
          AbstractDs and class DataSet from H5Object and AbstractDs.
          In addition, data member IdComponent::id was moved into subclasses:
          Attribute, DataSet, DataSpace, DataType, H5File, Group, and PropList.
          (BMR - 2008/05/20)
        - IdComponent::dereference was incorrect; it was changed from:
          void IdComponent::dereference(IdComponent& obj, void* ref)
          to:
            void H5Object::dereference(H5File& h5file, void* ref)
            void H5Object::dereference(H5Object& obj, void* ref)
          (BMR - 2008/05/20)
        - Revised Attribute::write and Attribute::read wrappers to handle
          memory allocation/deallocation properly. (bugzilla 1045)
          (BMR - 2008/05/20)


Platforms Tested
================
The following platforms and compilers have been tested for this release.

    Cray XT3 (2.0.41)             cc (pgcc) 7.1-4
    (red storm)                   ftn (pgf90) 7.1-4
                CC (pgCC) 7.1-4
                                  mpicc 1.0.2
                                  mpif90 1.0.2

    FreeBSD 6.2-STABLE i386       gcc 3.4.6 [FreeBSD] 20060305
    (duty)                        g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.2.1 20080123
                                  g++ 4.2.1 20080123
                                  gfortran 4.2.1 20070620

    FreeBSD 6.2-STABLE amd64      gcc 3.4.6 [FreeBSD] 20060305
    (liberty)                     g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.2.1 20080123
                                  g++ 4.2.1 20080123
                                  gfortran 4.2.1 20080123

    IRIX64 6.5 (64 & n32)         MIPSpro cc 7.4.4m
                                  F90 MIPSpro 7.4.4m
                                  C++ MIPSpro cc 7.4.4m

    Linux 2.6.9 (RHEL4)           Intel 10.0 compilers
    (abe.ncsa.uiuc.edu)

    Linux 2.4.21-47               gcc 3.2.3 20030502
    (osage)

    Linux 2.6.9-42.0.10           gcc,g++ 3.4.6 20060404, G95 (GCC 4.0.3)
    (kagiso)                      PGI 7.1-6 (pgcc, pgf90, pgCC)
                                  Intel 9.1 (icc, ifort, icpc)

    Linux 2.6.16.27 x86_64 AMD    gcc 4.1.0 (SuSE Linux), g++ 4.1.0,
    (smirom)                          g95 (GCC 4.0.3)
                                  PGI 7.1-6 (pgcc, pgf90, pgCC)
                                  Intel 9.1 (icc, ifort, icpc)

    Linux 2.6.5-7.252.1-rtgfx #1  Intel(R) C++ Version 9.0
          SMP ia64                Intel(R) Fortran Itanium(R) Version 9.0
    (cobalt)                      SGI MPI

    SunOS 5.8 32,46               Sun WorkShop 6 update 2 C 5.3
     (Solaris 2.8)                Sun WorkShop 6 update 2 Fortran 95 6.2
                                  Sun WorkShop 6 update 2 C++ 5.3

    SunOS 5.10                    cc: Sun C 5.8
    (linew)                       f90: Sun Fortran 95 8.2
                                  CC: Sun C++ 5.8

    Xeon Linux 2.4.21-32.0.1.ELsmp-perfctr-lustre
    (tungsten)                    gcc 3.2.2 20030222
                                  Intel(R) C++ Version 9.0
                                  Intel(R) Fortran Compiler Version 9.0

    IA-64 Linux 2.4.21.SuSE_309.tg1 ia64
    (NCSA tg-login)               gcc 3.2.2
                                  Intel(R) C++ Version 8.1
                                  Intel(R) Fortran Compiler Version 8.1
                                  mpich-gm-1.2.6..14b-intel-r2

    Intel 64 Linux 2.6.9-42.0.10.EL_lustre-1.4.10.1smp
    (abe)                         gcc 3.4.6 20060404
                                  Intel(R) C++ Version 10.0
                                  Intel (R) Fortran Compiler Version 10.0
                                  mvapich2-0.9.8p2patched-intel-ofed-1.2

    Windows XP                    Visual Studio .NET
                                  Visual Studio 2005 w/ Intel Fortran 9.1
                                  Cygwin(native gcc compiler and g95)
                                  MinGW(native gcc compiler and g95)

    Windows XP x64                Visual Studio 2005 w/ Intel Fortran 9.1

    Windows Vista                 Visual Studio 2005

    MAC OS  10.5.2 (Intel)        i686-apple-darwin9-gcc-4.0.1 (GCC) 4.0.1
                                  GNU Fortran (GCC) 4.3.0 20070810
                                  G95 (GCC 4.0.3 (g95 0.91!) Apr 24 2008)


Supported Configuration Features Summary
========================================

    In the tables below
          y   = tested and supported
          n   = not supported or not tested in this release
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                 C        F90    F90      C++   zlib  SZIP
                         parallel        parallel
SunOS5.10 64-bit         n        y      n        y     y     y
SunOS5.10 32-bit         n        y      n        y     y     y
IRIX64_6.5 64-bit        n        y      y        y     y     y
IRIX64_6.5 32-bit        n        n      n        n     y     y
Windows XP               n        y(15)  n(15)    y     y     y
Windows XP x64           n        y(15)  n(15)    y     y     y
Windows Vista            n        n      n        y     y     y
Mac OS X 10.5 Intel      n        y      n        y     y     y
FreeBSD 4.11             n        n      n        y     y     y
RedHat EL3  W       (3)  y(1)     y(10)  y(1)     y     y     y
RedHat EL3  W Intel (3)  n        y      n        y     y     n
RedHat EL3  W PGI   (3)  n        y      n        y     y     n
SuSe x86_64 gcc  (3,12)  y(2)     y(11)  y(2)     y     y     y
SuSe x86_64 Int  (3,12)  n        y(13)  n        y     y     n
SuSe x86_64 PGI  (3,12)  n        y(8)   n        y     y     y
Linux 2.4 Xeon C
    Lustre Intel  (3,6)  n        y      n        y     y     n
Linux 2.6 SuSE ia64 C
    Intel         (3,7)  y        y      y        y     y     n
Linux 2.6 SGI Altix
    ia64 Intel      (3)  y        y      y        y     y     y
Linux 2.6 RHEL C
    Lustre Intel    (5)  y(4)     y      y(4)     y     y     n
Cray XT3 2.0.41          y        y      y        y     y     n


Platform                 Shared  Shared    Shared    Thread-
                         C libs  F90 libs  C++ libs  safe
Solaris2.10 64-bit       y       y         y         y
Solaris2.10 32-bit       y       y         y         y
IRIX64_6.5 64-bit        y       y         n         y
IRIX64_6.5 32-bit        y       dna       y         y
Windows XP               y       y(15)     y         y
Windows XP x64           y       y(15)     y         y
Windows Vista            y       n         n         y
Mac OS X 10.3            y                           n
FreeBSD 4.11             y       n         y         y
RedHat EL3  W       (3)  y       y(10)     y         y
RedHat EL3  W Intel (3)  y       y         y         n
RedHat EL3  W PGI   (3)  y       y         y         n
SuSe x86_64 W GNU (3,12) y       y         y         y
SuSe x86_64 W Int (3,12) y       y         y         n
SuSe x86_64 W PGI (3,12) y       y         y         n
Linux 2.4 Xeon C
    Lustre Intel    (6)  y       y         y         n
Linux 2.4 SuSE
    ia64 C Intel    (7)  y       y         y         n
Linux 2.4 SGI Altix
    ia64 Intel           y                           n
Linux 2.6 RHEL C
    Lustre Intel    (5)  y        y        y         n
Cray XT3 2.0.41          n       n         n         n        n

    Notes: (1)  Using mpich2 1.0.6.
           (2)  Using mpich2 1.0.7.
           (3)  Linux 2.6 with GNU, Intel, and PGI compilers, as indicated.
                  W or C indicates workstation or cluster, respectively.
           (4)  Using mvapich2 0.9.8.
           (5)  Linux 2.6.9-42.0.10.  Xeon cluster with ELsmp_perfctr_lustre
                  and Intel compilers
           (6)  Linux 2.4.21-32.0.1.  Xeon cluster with ELsmp_perfctr_lustre
                  and Intel compilers
           (7)  Linux 2.4.21, SuSE_292.till.  Ia64 cluster with Intel compilers
           (8)  pgf90
           (9)  With Compaq Visual Fortran 6.6c compiler.
           (10) With PGI and Absoft compilers.
           (11) PGI and Intel compilers for both C and Fortran
           (12) AMD Opteron x86_64
           (13) ifort
           (14) Yes with C and Fortran, but not with C++
           (15) Using Visual Studio 2005 or Cygwin
           (16) Not tested for this release.
    Compiler versions for each platform are listed in the preceding
    "Platforms Tested" table.


Known Problems
==============
* For Red Storm, a Cray XT3 system, the yod command sometimes gives the
  message,  "yod allocation delayed for node recovery".  This interferes with
  test suites that do not expect seeing this message.  See the section of "Red
  Storm" in file INSTALL_parallel for a way to deal with this problem.
  AKC - 2008/05/28

* For Red Storm, a Cray XT3 system, the tools/h5ls/testh5ls.sh will fail on
  the test "Testing h5ls -w80 -r -g tgroup.h5" fails.  This test is
  expected to fail and exit with a non-zero code but the yod command does
  not propagate the exit code of the executables. Yod always returns 0 if it
  can launch the executable.  The test suite shell expects a non-zero for
  this particular test, therefore it concludes the test has failed when it
  receives 0 from yod.  To bypass this problem for now, change the following
  lines in the tools/h5ls/testh5ls.sh.
  ======== Original =========
  # The following combination of arguments is expected to return an error message
  # and return value 1
  TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ======== Skip the test =========
  echo SKIP TOOLTEST tgroup-1.ls 1 -w80 -r -g tgroup.h5
  ======== end of bypass ========
  AKC - 2008/05/28

* We have discovered two problems when running collective IO parallel HDF5
  tests with chunking storage on the ChaMPIon MPI compiler on tungsten, a
  Linux cluster at NCSA.

  Under some complex selection cases:
  1) MPI_Get_element returns the wrong value.
  2) MPI_Type_struct also generates the wrong derived datatype and corrupt
     data may be generated.
  These issues arise only when turning on collective IO with chunking storage
  with some complex selections. We have not found these problems on other
  MPI-IO compilers. If you encounter these problems, you may use independent
  IO instead.

  To avoid this behavior, change the following line in your code
      H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_COLLECTIVE);
  to
      H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_INDEPENDENT);

  KY - 2007/08/24

* For SNL, spirit/liberty/thunderbird: The serial tests pass but parallel
  tests failed with MPI-IO file locking message. AKC - 2007/6/25

* On Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* For LLNL, uP: both serial and parallel tests pass.
  Zeus: Serial tests pass but parallel tests fail with a known problem in MPI.
  ubgl: Serial tests pass but parallel tests fail.

* Configuring with --enable-debug=all produces compiler errors on most
  platforms:  Users who want to run HDF5 in debug mode should use
  --enable-debug rather than --enable-debug=all to enable debugging
  information on most modules.

* On Mac OS 10.4, test/dt_arith.c has some errors in conversion from long
  double to (unsigned) long long and from (unsigned) long long to long double.

* On Altix SGI with Intel 9.0, testmeta.c would not compile with -O3
  optimization flag.

* On VAX, the Scaleoffset filter is not supported.  The Scaleoffset filter
  supports only the IEEE standard for floating-point data; it cannot be applied
  to HDF5 data generated on VAX.

* On Cray X1, a lone colon on the command line of h5dump --xml (as in
  the testh5dumpxml.sh script) is misinterpereted by the operating system
  and causes an error.

* On mpich 1.2.5 and 1.2.6, if more than two processes contribute no IO and
  the application asks to do collective IO, we have found that when using 4
  processors, a simple collective write will sometimes be hung. This can be
  verified with t_mpi test under testpar.

* On IRIX6.5, when the C compiler version is greater than 7.4, complicated
  MPI derived datatype code will work. However, the user should increase
  the value of the MPI_TYPE_MAX environment variable to some appropriate value
  to use collective irregular selection code.  For example, the current
  parallel HDF5 test needs to raise MPI_TYPE_MAX to 200,000 to pass the test.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculation of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  SLU - 2005/6/30

* For version 6 (6.02 and 6.04) of the Portland Group compiler on the AMD
  Opteron processor, there is a bug in the compiler for optimization(-O2).
  The library failed in several tests, all related to the MULTI driver.
  The problem has been reported to the vendor.

* On IBM AIX systems, parallel HDF5 mode will fail some tests with error
  messages like "INFO: 0031-XXX ...".  This is from the command `poe'.
  Set the environment variable MP_INFOLEVEL to 0 to minimize the messages
  and run the tests again.

  The tests may fail with messages like "The socket name is already in use",
  but HDF5 does not use sockets.  This failure is due to problems with the
  poe command trying to set up the debug socket.  To resolve this problem,
  check to see whether there are many old /tmp/s.pedb.* files staying around.
  These are sockets used by the poe command and left behind due to failed
  commands.  First, ask your system administrator to clean them out.
  Lastly, request IBM to provide a means to run poe without the debug socket.

* The --enable-static-exec configure flag fails to compile for Solaris
  platforms. This is due to the fact that not all of the system libraries on
  Solaris are available in a static format.

  The --enable-static-exec configure flag also fails to correctly compile
  on IBM SP2 platforms for serial mode. The parallel mode works fine with
  this option.

  It is suggested that you do not use this option on these platforms
  during configuration.

* With the gcc 2.95.2 compiler, HDF5 uses the `-ansi' flag during
  compilation. The ANSI version of the compiler complains about not being
  able to handle the `long long' datatype with the warning:

        warning: ANSI C does not support `long long'

  This warning is innocuous and can be safely ignored.

* The ./dsets tests fail on the TFLOPS machine if the test program,
  dsets.c, is compiled with the -O option.  The HDF5 library still works
  correctly with the -O option.  The test program works fine if it is
  compiled with -O1 or -O0.  Only -O (same as -O2) causes the test
  program to fail.

* Not all platforms behave correctly with Szip's shared libraries. Szip is
  disabled in these cases, and a message is relayed at configure time. Static
  libraries should be working on all systems that support Szip and should be
  used when shared libraries are unavailable.

  There is also a configure error on Altix machines that incorrectly reports
  when a version of Szip without an encoder is being used.

* On some platforms that use Intel and Absoft compilers to build the HDF5
  Fortran library, compilation may fail for fortranlib_test.f90, fflush1.f90
  and fflush2.f90 complaining about the exit subroutine. Comment out the line
  IF (total_error .ne. 0) CALL exit (total_error).

* Information about building with PGI and Intel compilers is available in
  the INSTALL file sections 4.7 and 4.8.

* On at least one system, SDSC DataStar, the scheduler (in this case
  LoadLeveler) sends job status updates to standard error when you run
  any executable that was compiled with the parallel compilers.

  This causes problems when running "make check" on parallel builds, as
  many of the tool tests function by saving the output from test runs,
  and comparing it to an exemplar.

  The best solution is to reconfigure the target system so it no longer
  inserts the extra text.  However, this may not be practical.

  In such cases, one solution is to "setenv HDF5_Make_Ignore yes" prior to
  the configure and build.  This will cause "make check" to continue after
  detecting errors in the tool tests.  However, in the case of SDSC DataStar,
  it also leaves you with some 150 "failed" tests to examine by hand.

  A second solution is to write a script to run serial tests and filter
  out the text added by the scheduler.  A sample script used on SDSC
  DataStar is given below, but you will probably have to customize it
  for your installation.

  Observe that the basic idea is to insert the script as the first item
  on the command line which executes the the test.  The script then
  executes the test and filters out the offending text before passing
  it on.

        #!/bin/csh

        set STDOUT_FILE=~/bin/serial_filter.stdout
        set STDERR_FILE=~/bin/serial_filter.stderr

        rm -f $STDOUT_FILE $STDERR_FILE

        ($* > $STDOUT_FILE) >& $STDERR_FILE

        set RETURN_VALUE=$status

        cat $STDOUT_FILE

        tail +3 $STDERR_FILE

        exit $RETURN_VALUE

  You get the HDF5 make files and test scripts to execute your filter script
  by setting the environment variable "RUNSERIAL" to the full path of the
  script prior to running configure for parallel builds.  Remember to
  "unsetenv RUNSERIAL" before running configure for a serial build.

  Note that the RUNSERIAL environment variable exists so that we can
  prefix serial runs as necessary on the target system.  On DataStar,
  no prefix is necessary.  However on an MPICH system, the prefix might
  have to be set to something like "/usr/local/mpi/bin/mpirun -np 1" to
  get the serial tests to run at all.

  In such cases, you will have to include the regular prefix in your
  filter script.

* H5Ocopy() does not copy reg_ref attributes correctly when shared-message
  is turn on. The value of the reference in the destination attriubte is
  wrong. This H5Ocopy problem will affect the h5copy tool.

* In the C++ API, it appears that there are bugs in Attribute::write/read
  and DataSet::write/read for fixed- and variable-len strings.  The problems
  are being worked on and a patch will be provided when the fixes are
  available.


%%%%1.8.0%%%%


HDF5 version 1.8.0 released on Tue Feb 12 20:41:19 CST 2008
================================================================================

INTRODUCTION
============

This document describes the differences between the HDF5-1.6.x release series
and HDF5 1.8.0, and contains information on the platforms tested and known
problems in HDF5-1.8.0.  For more details, see the HISTORY-1_0-1_8_0_rc3.txt
file in the
release_docs/ directory of the HDF5 source.

Links to the HDF5 1.8.0 source code, documentation, and additional materials
can be found on the HDF5 web page at:

     http://www.hdfgroup.org/products/hdf5/

The HDF5 1.8.0 release can be obtained from:

     http://www.hdfgroup.org/HDF5/release/obtain5.html

User documentation for 1.8.0 can be accessed directly at this location:

     http://www.hdfgroup.org/HDF5/doc/

New features in 1.8.0, including brief general descriptions of some new
and modified APIs, are described in the "What's New in 1.8.0?" document:

     http://www.hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html

All new and modified APIs are listed in detail in the "HDF5 Software Changes
from Release to Release" document, in the section "Release 1.8.0 (current
release) versus Release 1.6.x":

     http://www.hdfgroup.org/HDF5/doc/ADGuide/Changes.html

If you have any questions or comments, please send them to the HDF Help Desk:

     help@hdfgroup.org


CONTENTS
========

- New Features
- Removed Feature
- Support for new platforms and languages
- Bug Fixes since HDF5-1.6.0
- Platforms Tested
- Supported Configuration Features Summary
- Known Problems


New Features
============

   HDF5 Release 1.8.0 is a major release with many changes and new features.

   New format and interface features discussed in the "What's New in
   HDF5 1.8.0" document include the following:

       Enhanced group object management
       Enhanced attribute management and more efficient meta data handling
       Expanded datatype features
       Creation order tracking and indexing
       Improved meta data caching and cache control
       UTF-8 encoding
       New I/O filters: n-bit and scale+offset compression
       New link (H5L) and object (H5O) interfaces and features
       External and user-defined links
       New high-level APIs:
           HDF5 Packet Table (H5PT) and HDF5 Dimension Scale (H5DS)
       C++ and Fortran interfaces for older high-level APIs:
           H5Lite (H5LT), H5Image (H5IM), and H5Table (H5TB)
       New and improved tools
       And more...

       http://hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html


    New APIs associated with these features, other interface changes
    (e.g., ENUM and struct definitions), and new library configuration flags
    are listed in the "Release 1.8.0 (current release) versus Release 1.6.x"
    section of "HDF5 Software Changes from Release to Release."

        http://hdfgroup.org/HDF5/doc/ADGuide/Changes.html

Compatibility
-------------
    Many HDF5 users and user communities have existing applications that
    they may wish to port to Release 1.8.0.  Alternatively, some users may
    wish to take advantage of Release 1.8.0's improved performance without
    having to port such applications.  To facilitate managing application
    compatibility and porting applications from release to release, the HDF
    Team has implemented the following features:
        Individually-configurable macros that selectively map common
            interface names to the old and new interfaces
        Library configuration options to configure the macro mappings

    Two related documents accompany this release:
        "API Compatibility Macros in HDF5" discusses the specifics of the
        new individually-configurable macros and library configuration
        options.
        http://hdfgroup.org/HDF5/doc/RM/APICompatMacros.html

        "New Features in HDF5 Release 1.8.0 and Backward/Forward Format
        Compatibility Issues" discusses each new feature with regard to
        its impact on format compatibility.
        http://hdfgroup.org/HDF5/doc/ADGuide/CompatFormat180.html

Referenced documents
--------------------
    http://hdfgroup.org/HDF5/doc/ADGuide/WhatsNew180.html
        "What's New in HDF5 1.8.0"

    http://hdfgroup.org/HDF5/doc/ADGuide/Changes.html
        The "Release 1.8.0 (current release) versus Release 1.6.x "
        section in "HDF5 Software Changes from Release to Release"

    http://hdfgroup.org/HDF5/doc/RM/APICompatMacros.html
        "API Compatibility Macros in HDF5"

    http://hdfgroup.org/HDF5/doc/ADGuide/CompatFormat180.html
        "New Features in HDF5 Release 1.8.0 and Backward/Forward Format
        Compatibility Issues"


Removed Feature
===============
The stream virtual file driver (H5FD_STREAM) have been removed in this
release. This affects the functions H5Pset_fapl_stream and H5Pget_fapl_stream
and the constant H5FD_STREAM.

This virtual file driver will be available at
http://hdf5-addons.origo.ethz.ch/. Note that at the time of this release,
the transition is still in progress; the necessary integration tools may
not be available when HDF5 Release 1.8.0 first comes out.


Support for New Platforms, Languages, and Compilers
===================================================
    - Support for Open VMS 7.3 was added.


Bug Fixes since HDF5-1.6.0
==========================
    This release contains numerous bug fixes. For details, see the
    "Changes from 1.6.0 to 1.8.0-rc3" section of the HISTORY.txt file for
    this release.


Platforms Tested
================
The following platforms and compilers have been tested for for this release.

    AIX 5.2 (32/64 bit)           xlc 8.0.0.11
                                  xlC 8.0
                                  xlf 10.01.0000.0
                                  mpcc_r 6.0.0.8
                                  mpxlf_r 8.1.1.7

    FreeBSD 6.2-STABLE i386       gcc 3.4.6 [FreeBSD] 20060305
    (duty)                        g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.2.1 20080123
                                  g++ 4.2.1 20080123
                                  gfortran 4.2.1 20070620

    FreeBSD 6.2-STABLE amd64      gcc 3.4.6 [FreeBSD] 20060305
    (liberty)                     g++ 3.4.6 [FreeBSD] 20060305
                                  gcc 4.2.1 20080123
                                  g++ 4.2.1 20080123
                                  gfortran 4.2.1 20080123

    IRIX64 6.5 (64 & n32)         MIPSpro cc 7.4.4m
                                  F90 MIPSpro 7.4.4m
                                  C++ MIPSpro cc 7.4.4m

    Linux 2.6.9 (RHEL4)           Intel 10.0 compilers
    (abe.ncsa.uiuc.edu)

    Linux 2.4.21-47               gcc 3.2.3 20030502
    (osage)

    Linux 2.6.9-42.0.10           gcc 3.4.6 20060404
    (kagiso)                      PGI 7.0-7 (pgcc, pgf90, pgCC)
                                  Intel 9.1 (icc, ifort, icpc)

    Linux 2.6.16.27 x86_64 AMD    gcc 4.1.0 (SuSE Linux), g++ 4.1.0,
    (smirom)                          g95 (GCC 4.0.3)
                                  PGI 6.2-5 (pgcc, pgf90, pgCC)
                                  Intel 9.1 (icc, iort, icpc)

    Linux 2.6.5-7.252.1-rtgfx #1  Intel(R) C++ Version 9.0
          SMP ia64                Intel(R) Fortran Itanium(R) Version 9.0
    (cobalt)                      SGI MPI

    SunOS 5.8 32,46               Sun WorkShop 6 update 2 C 5.3
     (Solaris 2.8)                Sun WorkShop 6 update 2 Fortran 95 6.2
                                  Sun WorkShop 6 update 2 C++ 5.3

    SunOS 5.10                    cc: Sun C 5.8
    (linew)                       f90: Sun Fortran 95 8.2
                                  CC: Sun C++ 5.8

    Xeon Linux 2.4.21-32.0.1.ELsmp-perfctr-lustre
    (tungsten)                    gcc 3.2.2 20030222
                                  Intel(R) C++ Version 9.0
                                  Intel(R) Fortran Compiler Version 9.0

    IA-64 Linux 2.4.21.SuSE_292.til1 ia64
    (NCSA tg-login)               gcc 3.2.2
                                  Intel(R) C++ Version 8.1
                                  Intel(R) Fortran Compiler Version 8.1
                                  mpich-gm-1.2.5..10-intel-r2

    Windows XP                    Visual Studio .NET
                                  Visual Studio 2005 w/ Intel Fortran 9.1
                                  Cygwin(native gcc compiler and g95)
                                  MinGW(native gcc compiler and g95)

    Windows XP x64                Visual Studio 2005 w/ Intel Fortran 9.1

    Windows Vista                 Visual Studio 2005

    MAC OS  10.4 (Intel)          gcc i686-apple-darwin8-gcc-4.0.1 (GCC) 4.0.1
                                  G95 (GCC 4.0.3 (g95 0.91!) Nov 21 2006)

    Alpha Open VMS 7.3            Compaq C V6.5-001-48BCD
                                  HP Fortran V7.6-3276
                                  Compaq C++ V6.5-004


Supported Configuration Features Summary
========================================

    In the tables below
          y   = tested and supported
          n   = not supported or not tested in this release
          x   = not working in this release
          dna = does not apply
          ( ) = footnote appears below second table
          <blank> = testing incomplete on this feature or platform

Platform                 C        F90    F90      C++   zlib  SZIP
                         parallel        parallel
SunOS5.8 64-bit          n        y      n        y     y     y
SunOS5.8 32-bit          n        y      n        y     y     y
SunOS5.10 64-bit         y(1)     y      n        y     y     y
SunOS5.10 32-bit         y(1)     y      n        y     y     y
IRIX64_6.5 64-bit        n        y      y        y     y     y
IRIX64_6.5 32-bit        n        n      n        n     y     y
AIX-5.2  32-bit          y        y      y        y     y     y
AIX-5.2  64-bit          y        y      y        y     y     y
Windows XP               n        y(15)  n(15)    y     y     y
Windows XP x64           n        y(15)  n(15)    y     y     y
Windows Vista            n        n      n        y     y     y
Mac OS X 10.4 PowerPC    n               n
Mac OS X 10.4 Intel      n        y      n        y     y     y
FreeBSD 4.11             n        n      n        y     y     y
RedHat EL3  W       (3)  y(1a)    y(10)  y(1a)    y     y     y
RedHat EL3  W Intel (3)  n        y      n        y     y     n
RedHat EL3  W PGI   (3)  n        y      n        y     y     n
SuSe x86_64 gcc  (3,12)  y(1a)    y(11)  n        y     y     y
SuSe x86_64 Int  (3,12)  n        y(13)  n        y     y     n
SuSe x86_64 PGI  (3,12)  n        y(8)   n        y     y     y
Linux 2.4 Xeon C
    Lustre Intel  (3,6)  n        y      n        y     y     n
Linux 2.6 SuSE ia64 C
    Intel         (3,7)  y        y      y        y     y     n
Linux 2.6 SGI Altix
    ia64 Intel      (3)  y        y      y        y     y     y
Alpha OpenVMS 7.3.2      n        y      n        y     n     n



Platform                 Shared  Shared    Shared    static-  Thread-
                         C libs  F90 libs  C++ libs  exec     safe
Solaris2.8 64-bit        y       y         y         x        y
Solaris2.8 32-bit        y       y         y         x        y
Solaris2.10 64-bit       y                           x        y
Solaris2.10 32-bit       y                           x        y
IRIX64_6.5 64-bit        y       y         n         y        y
IRIX64_6.5 32-bit        y       dna       y         y        y
AIX-5.2 & 5.3 32-bit     n       n         n         y        n
AIX-5.2 & 5.3 64-bit     n       n         n         y        n
Windows XP               y       y(15)     y         y        y
Windows XP x64           y       y(15)     y         y        y
Windows Vista            y       n         n         y        y
Mac OS X 10.3            y                           y        n
FreeBSD 4.11             y       n         y         y        y
RedHat EL3  W       (3)  y       y(10)     y         y        y
RedHat EL3  W Intel (3)  y       y         y         y        n
RedHat EL3  W PGI   (3)  y       y         y         y        n
SuSe x86_64 W GNU (3,12) y       y         y         y        y
SuSe x86_64 W Int (3,12) y       y         y         y(14)    n
SuSe x86_64 W PGI (3,12) y       y         y         y(14)    n
Linux 2.4 Xeon C
    Lustre Intel    (6)  y       y         y         y        n
Linux 2.4 SuSE
    ia64 C Intel    (7)  y       y         y         y        n
Linux 2.4 SGI Altix
    ia64 Intel           y                           y        n
Alpha OpenVMS 7.3.2      n       n         n         y        n

    Notes: (1)  Using mpich 1.2.6.
           (1a) Using mpich2 1.0.6.
           (2)  Using mpt and mpich 1.2.6.
           (3)  Linux 2.6 with GNU, Intel, and PGI compilers, as indicated.
                  W or C indicates workstation or cluster, respectively.

           (6)  Linux 2.4.21-32.0.1.  Xeon cluster with ELsmp_perfctr_lustre
                  and Intel compilers
           (7)  Linux 2.4.21, SuSE_292.till.  Ia64 cluster with Intel
compilers
           (8)  pgf90
           (9)  With Compaq Visual Fortran 6.6c compiler.
           (10) With PGI and Absoft compilers.
           (11) PGI and Intel compilers for both C and Fortran
           (12) AMD Opteron x86_64
           (13) ifort
           (14) Yes with C and Fortran, but not with C++
    (15) Using Visual Studio 2005 or Cygwin
           (16) Not tested for this release.
    Compiler versions for each platform are listed in the preceding
    "Platforms Tested" table.


Known Problems
==============
* We have discovered two problems when running collective IO parallel HDF5
  tests with chunking storage on the ChaMPIon MPI compiler on tungsten, a
  Linux cluster at NCSA.

  Under some complex selection cases:
  1) MPI_Get_element returns the wrong value.
  2) MPI_Type_struct also generates the wrong derived datatype and corrupt
     data may be generated.
  These issues arise only when turning on collective IO with chunking storage
  with some complex selections. We have not found these problems on other
  MPI-IO compilers. If you encounter these problems, you may use independent
  IO instead.

  To avoid this behavior, change the following line in your code
      H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_COLLECTIVE);

  to
      H5Pset_dxpl_mpio(xfer_plist, H5FD_MPIO_INDEPENDENT);

  KY - 2007/08/24

* For SNL, spirit/liberty/thunderbird: The serial tests pass but parallel
  tests failed with MPI-IO file locking message. AKC - 2007/6/25

* On Intel 64 Linux cluster (RH 4, Linux 2.6.9) with Intel 10.0 compilers,
  use -mp -O1 compilation flags to build the libraries. A higher level of
  optimization causes failures in several HDF5 library tests.

* For SNL, Red Storm: Only parallel HDF5 is supported.  The serial tests pass
  when run against the parallel library; the parallel tests also pass, but
  with lots of non-fatal error messages.

* For LLNL, uP: both serial and parallel tests pass.
  Zeus: Serial tests pass but parallel tests fail with a known problem in MPI.
  ubgl: Serial tests pass but parallel tests fail.

* On SUN 5.10 C++, testing fails in the "Testing Shared Datatypes with
  Attributes" test.

* Configuring with --enable-debug=all produces compiler errors on most
  platforms:  Users who want to run HDF5 in debug mode should use
  --enable-debug rather than --enable-debug=all to enable debugging
  information on most modules.

* On Mac OS 10.4, test/dt_arith.c has some errors in conversion from long
  double to (unsigned) long long and from (unsigned) long long to long double.

* On Altix SGI with Intel 9.0, testmeta.c would not compile with -O3
  optimization flag.

* On VAX, the Scaleoffset filter is not supported. The filter cannot be
  applied to HDF5 data generated on VAX. The Scaleoffset filter only supports
  the IEEE standard for floating-point data.

* On Cray X1, a lone colon on the command line of h5dump --xml (as in
  the testh5dumpxml.sh script) is misinterpereted by the operating system
  and causes an error.

* On mpich 1.2.5 and 1.2.6, if more than two processes contribute no IO and
  the application asks to do collective IO, we have found that when using 4
  processors, a simple collective write will sometimes be hung. This can be
  verified with t_mpi test under testpar.

* On IRIX6.5, when the C compiler version is greater than 7.4, complicated
  MPI derived datatype code will work. However, the user should increase
  the value of the MPI_TYPE_MAX environment variable to some appropriate value
  to use collective irregular selection code.  For example, the current
  parallel HDF5 test needs to raise MPI_TYPE_MAX to 200,000 to pass the test.

* A dataset created or rewritten with a v1.6.3 library or after cannot be read
  with the v1.6.2 library or before when the Fletcher32 EDC filter is enabled.
  There was a bug in the calculating code of the Fletcher32 checksum in the
  library before v1.6.3; the checksum value was not consistent between big-
  endian and little-endian systems.  This bug was fixed in Release 1.6.3.
  However, after fixing the bug, the checksum value was no longer the same as
  before on little-endian system.  Library releases after 1.6.4 can still read
  datasets created or rewritten with an HDF5 library of v1.6.2 or before.
  SLU - 2005/6/30

* For version 6 (6.02 and 6.04) of the Portland Group compiler on the AMD
  Opteron processor, there is a bug in the compiler for optimization(-O2).
  The library failed in several tests, all related to the MULTI driver.
  The problem has been reported to the vendor.

* On IBM AIX systems, parallel HDF5 mode will fail some tests with error
  messages like "INFO: 0031-XXX ...".  This is from the command `poe'.
  Set the environment variable MP_INFOLEVEL to 0 to minimize the messages
  and run the tests again.

  The tests may fail with messages like "The socket name is already in use",
  but HDF5 does not use sockets.  This failure is due to problems with the
  poe command trying to set up the debug socket.  To resolve this problem,
  check to see whether there are many old /tmp/s.pedb.* files staying around.
  These are sockets used by the poe command and left behind due to failed
  commands.  First, ask your system administrator to clean them out.
  Lastly, request IBM to provide a means to run poe without the debug socket.

* The --enable-static-exec configure flag fails to compile for Solaris
  platforms. This is due to the fact that not all of the system libraries on
  Solaris are available in a static format.

  The --enable-static-exec configure flag also fails to correctly compile
  on IBM SP2 platform for the serial mode. The parallel mode works fine with
  this option.

  It is suggested that you do not use this option on these platforms
  during configuration.

* With the gcc 2.95.2 compiler, HDF5 uses the `-ansi' flag during
  compilation. The ANSI version of the compiler complains about not being
  able to handle the `long long' datatype with the warning:

        warning: ANSI C does not support `long long'

  This warning is innocuous and can be safely ignored.

* The ./dsets tests fail on the TFLOPS machine if the test program,
  dsets.c, is compiled with the -O option.  The HDF5 library still works
  correctly with the -O option.  The test program works fine if it is
  compiled with -O1 or -O0.  Only -O (same as -O2) causes the test
  program to fail.

* Not all platforms behave correctly with Szip's shared libraries. Szip is
  disabled in these cases, and a message is relayed at configure time. Static
  libraries should be working on all systems that support Szip and should be
  used when shared libraries are unavailable.

  There is also a configure error on Altix machines that incorrectly reports
  when a version of Szip without an encoder is being used.

* On some platforms that use Intel and Absoft compilers to build the HDF5
  Fortran library, compilation may fail for fortranlib_test.f90, fflush1.f90
  and fflush2.f90 complaining about the exit subroutine. Comment out the line
  IF (total_error .ne. 0) CALL exit (total_error).

* Information about building with PGI and Intel compilers is available in
  the INSTALL file sections 4.7 and 4.8.

* On at least one system, SDSC DataStar, the scheduler (in this case
  LoadLeveler) sends job status updates to standard error when you run
  any executable that was compiled with the parallel compilers.

  This causes problems when running "make check" on parallel builds, as
  many of the tool tests function by saving the output from test runs,
  and comparing it to an exemplar.

  The best solution is to reconfigure the target system so it no longer
  inserts the extra text.  However, this may not be practical.

  In such cases, one solution is to "setenv HDF5_Make_Ignore yes" prior to
  the configure and build.  This will cause "make check" to continue after
  detecting errors in the tool tests.  However, in the case of SDSC DataStar,
  it also leaves you with some 150 "failed" tests to examine by hand.

  A second solution is to write a script to run serial tests and filter
  out the text added by the scheduler.  A sample script used on SDSC
  DataStar is given below, but you will probably have to customize it
  for your installation.

  Observe that the basic idea is to insert the script as the first item
  on the command line which executes the the test.  The script then
  executes the test and filters out the offending text before passing
  it on.

        #!/bin/csh

        set STDOUT_FILE=~/bin/serial_filter.stdout
        set STDERR_FILE=~/bin/serial_filter.stderr

        rm -f $STDOUT_FILE $STDERR_FILE

        ($* > $STDOUT_FILE) >& $STDERR_FILE

        set RETURN_VALUE=$status

        cat $STDOUT_FILE

        tail +3 $STDERR_FILE

        exit $RETURN_VALUE

  You get the HDF5 make files and test scripts to execute your filter script
  by setting the environment variable "RUNSERIAL" to the full path of the
  script prior to running configure for parallel builds.  Remember to
  "unsetenv RUNSERIAL" before running configure for a serial build.

  Note that the RUNSERIAL environment variable exists so that we can
  can prefix serial runs as necessary on the target system.  On DataStar,
  no prefix is necessary.  However on an MPICH system, the prefix might
  have to be set to something like "/usr/local/mpi/bin/mpirun -np 1" to
  get the serial tests to run at all.

  In such cases, you will have to include the regular prefix in your
  filter script.

* H5Ocopy() does not copy reg_ref attributes correctly when shared-message
  is turn on. The value of the reference in the destination attriubte is
  wrong. This H5Ocopy problem will affect the h5copy tool.

