Update RELEASE.txt and add HISTORY-1_10_0-1_12_0.txt file.

Set version to 1.12.0-alpha0 for snapshot release.

1 files changed, 129 insertions, 953 deletions

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 01b7d6d..ecb2ef3 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -1,16 +1,15 @@
-HDF5 version 1.12.0 currently under development
+HDF5 version 1.12.0-alpha0 currently under development
 ================================================================================
 
 
 INTRODUCTION
 
-This document describes the differences between this release and the previous
-HDF5 release. It contains information on the platforms tested and known
-problems in this release. For more details check the HISTORY*.txt files in the
-HDF5 source.
+This document describes the new features introduced in the HDF5 1.12.0 release. 
+It contains information on the platforms tested and known problems in this 
+release. For more details check the HISTORY*.txt files in the HDF5 source.
 
-Note that documentation in the links below will be updated at the time of each
-final release.
+Note that documentation in the links below will be updated at the time of the
+release.
 
 Links to HDF5 documentation can be found on The HDF5 web page:
 
@@ -20,10 +19,9 @@ The official HDF5 releases can be obtained from:
 
      https://www.hdfgroup.org/downloads/hdf5/
 
-Changes from Release to Release and New Features in the HDF5-1.10.x release series
-can be found at:
+More information about the new features can be found at:
 
-     https://portal.hdfgroup.org/display/HDF5/HDF5+Application+Developer%27s+Guide
+     https://portal.hdfgroup.org/display/HDF5/New+Features+in+HDF5+Release+1.12
 
 If you have any questions or comments, please send them to the HDF Help Desk:
 
@@ -34,8 +32,7 @@ CONTENTS
 
 - New Features
 - Support for new platforms and languages
-- Bug Fixes since HDF5-1.10.3
-- Bug Fixes since HDF5-1.10.2
+- Major Bug Fixes since HDF5-1.10.0
 - Supported Platforms
 - Tested Configuration Features Summary
 - More Tested Platforms
@@ -46,928 +43,102 @@ CONTENTS
 New Features
 ============
 
-    Configuration:
-    -------------
-    - Update CMake tests to use FIXTURES
-
-      CMake test fixtures allow setup/cleanup tests and other dependency
-      requirements as properties for tests. This is more flexible for
-      modern CMake code.
-
-      (ADB - 2019/07/23, HDFFV-10529)
-
-    - Windows PDB files are always installed
-
-      There are build configuration or flag settings for Windows that may not
-      generate PDB files. If those files are not generated then the install
-      utility will fail because those PDB files are not found. An optional
-      variable, DISABLE_PDB_FILES, was added to not install PDB files.
-
-      (ADB - 2019/07/17, HDFFV-10424)
-
-    - Add mingw CMake support with a toolchain file
-
-      There has been a number of mingw issues that has been linked under
-      HDFFV-10845. It has been decided to implement the CMake cross-compiling
-      technique of toolchain files. We will use a linux platform with the mingw
-      compiler stack for testing. Only the C language is fully supported, and
-      the error tests are skipped. The C++ language works for static but shared
-      builds has a shared library issue with the mingw Standard Exception Handling
-      library, which is not available on Windows. Fortran has a common cross-compile
-      problem with the fortran configure tests.
-
-      (ADB - 2019/07/12, HDFFV-10845, HDFFV-10595)
-
-    - Windows PDB files are installed incorrectly
-
-      For static builds, the PDB files for windows should be installed next
-      to the static libraries in the lib folder. Also the debug versions of
-      libraries and PDB files are now correctly built using the default
-      CMAKE_DEBUG_POSTFIX setting.
-
-      (ADB - 2019/07/09, HDFFV-10581)
-
-    - Add option to build only shared libs
-
-      A request was made to prevent building static libraries and only build
-      shared.  A new option was added to CMake, ONLY_SHARED_LIBS, which will
-      skip building static libraries. Certain utility functions will build with
-      static libs but are not published. Tests are adjusted to use the correct
-      libraries depending on SHARED/STATIC settings.
-
-      (ADB - 2019/06/12, HDFFV-10805)
-
-    - Add options to enable or disable building tools and tests
-
-      Configure options --enable-tests and --enable-tools were added for
-      autotools configure.  These options are enabled by default, and can be
-      disabled with either --disable-tests (or tools) or --enable-tests=no
-      (or --enable-tools=no).  Build time is reduced ~20% when tools are
-      disabled, 35% when tests are disabled, 45% when both are disabled.
-      Reenabling them after the initial build requires running configure
-      again with the option(s) enabled.
-
-      (LRK - 2019/06/12, HDFFV-9976)
-
-    - Change tools test that test the error stack
-
-      There are some use cases which can cause the error stack of tools to be
-      different then the expected output. These tests now use grepTest.cmake,
-      this was changed to allow the error file to be searched for an expected string.
-
-      (ADB - 2019/04/15, HDFFV-10741)
-
-    - Keep stderr and stdout separate in tests
-
-      Changed test handling of output capture. Tests now keep the stderr
-      output separate from the stdout output. It is up to the test to decide
-      which output to check against a reference. Also added the option
-      to grep for a string in either output.
-
-      (ADB - 2018/12/12, HDFFV-10632)
-
-    - Add toolchain and cross-compile support
-
-      Added info on using a toolchain file to INSTALL_CMAKE.txt. A
-      toolchain file is also used in cross-compiling, which requires
-      CMAKE_CROSSCOMPILING_EMULATOR to be set. To help with cross-compiling
-      the fortran configure process, the HDF5UseFortran.cmake file macros
-      were improved. Fixed a Fortran configure file issue that incorrectly
-      used #cmakedefine instead of #define.
-
-      (ADB - 2018/10/04, HDFFV-10594)
-
-    - Add warning flags for Intel compilers
-
-      Identified Intel compiler specific warnings flags that should be used
-      instead of GNU flags.
-
-      (ADB - 2018/10/04, TRILABS-21)
-
-    - Add default rpath to targets
-
-      Default rpaths should be set in shared executables and
-      libraries to allow the use of loading dependent libraries
-      without requiring LD_LIBRARY_PATH to be set. The default
-      path should be relative using @rpath on osx and $ORIGIN
-      on linux. Windows is not affected.
-
-      (ADB - 2018/09/26, HDFFV-10594)
-
-    - Add missing USE_110_API_DEFAULT option.
-
-      Option USE_110_API_DEFAULT sets the default version of
-      versioned APIs. The bin/makevers perl script did not set
-      the maxidx variable correctly when the 1.10 branch was
-      created. This caused the versioning process to always use
-      the latest version of any API.
-
-      (ADB - 2018/08/17, HDFFV-10552)
-
-    - Added configuration checks for the following MPI functions:
-
-      MPI_Mprobe - Used for the Parallel Compression feature
-      MPI_Imrecv - Used for the Parallel Compression feature
-
-      MPI_Get_elements_x - Used for the "big Parallel I/O" feature
-      MPI_Type_size_x - Used for the "big Parallel I/O" feature
-
-      (JTH - 2018/08/02, HDFFV-10512)
-
-    - Added section to the libhdf5.settings file to indicate
-      the status of the Parallel Compression and "big Parallel I/O"
-      features.
-
-      (JTH - 2018/08/02, HDFFV-10512)
-
-    - Add option to execute swmr shell scripts from CMake.
-
-      Option TEST_SHELL_SCRIPTS redirects processing into a
-      separate ShellTests.cmake file for UNIX types. The tests
-      execute the shell scripts if a SH program is found.
-
-      (ADB - 2018/07/16)
-
-
     Library:
     --------
-    - Add S3 and HDFS VFDs to HDF5 maintenance
+    - Virtual Object Layer (VOL)
+
+      In this major HDF5 release we introduce HDF5 Virtual Object Layer (VOL). 
+      VOL is an abstraction layer within the HDF5 library that enables different 
+      methods for accessing data and objects that conform to the HDF5 data model. 
+      The VOL layer intercepts all HDF5 API calls that potentially modify data 
+      on disk and forwards those calls to a plugin "object driver". The data on 
+      disk can be a different format than the HDF5 format. For more information 
+      about VOL we refer the reader to the following documents (under review):
+
+          VOL HDF5 APIs
+          https://portal.hdfgroup.org/display/HDF5/Virtual+Object++Layer
+
+          VOL Documentation
+          https://bitbucket.hdfgroup.org/projects/HDFFV/repos/hdf5doc/browse/RFCs/HDF5/VOL
+
+          Repository with VOL plugins
+          https://bitbucket.hdfgroup.org/projects/HDF5VOL
+
+    - Enhancements to HDF5 References
+        
+      HDF5 references were extended to support attributes, and object and dataset 
+      selections that reside in another HDF5 file. For more information including 
+      a list of new APIs, see 
+      
+          https://portal.hdfgroup.org/display/HDF5/Update+to+References
+
+      Current known limitations for references in this release: 
+      • HDF5 command-line tools have not be updated to read new references types
+      • When reading data with the H5T_STD_REF type, if data is filled with 0s, 
+        H5A/Dread() currently returns an error. This will be fixed in an upcoming 
+        release.
+      • h5dump will fail to display references on big-endian machines
+
+    - New S3 and HDFS Virtual File Drivers (VFDs)
+
+      This release has two new VFDs. The S3 VFD allows to access HDF5 files on 
+      AWS S3 buckets. HDFS VFD allows access to HDF5 file stored on Apache HDFS. 
+      See https://portal.hdfgroup.org/display/HDF5/H5P_SET_FAPL_ROS3
+      and https://portal.hdfgroup.org/display/HDF5/H5P_SET_FAPL_HDFS
+      for how to use those APIs. 
+      See https://portal.hdfgroup.org/display/HDF5/Virtual+Object+Layer+and+Virtual+File+Drivers
+      for more information about configuring and setting up either the S3 or HDFS vfd. 
+      Below are specific instructions how to enable S3 VFD on Windows:
 
       Fix windows requirements and java tests. Windows requires CMake 3.13.
-            Install openssl library (with dev files);
-            from "Shining Light Productions". msi package preferred.
-
-            PATH should have been updated with the installation dir.
-            set ENV variable OPENSSL_ROOT_DIR to the installation dir.
-            set ENV variable OPENSSL_CONF to the cfg file, likely %OPENSSL_ROOT_DIR%\bin\openssl.cfg
-            Install libcurl library (with dev files);
-            download the latest released version using git: https://github.com/curl/curl.git
-
-            Open a Visual Studio Command prompt
-            change to the libcurl root folder
-            run the "buildconf.bat" batch file
-            change to the winbuild directory
-            nmake /f Makefile.vc mode=dll MACHINE=x64
-            copy libcurl-vc-x64-release-dll-ipv6-sspi-winssl dir to C:\curl (installation dir)
-            set ENV variable CURL_ROOT to C:\curl (installation dir)
-            update PATH ENV variable to %CURL_ROOT%\bin (installation bin dir).
-            the aws credentials file should be in %USERPROFILE%\.aws folder
-            set the ENV variable "HDF5_ROS3_TEST_BUCKET_URL=https://s3.us-east-2.amazonaws.com/hdf5ros3"
-
-      (ADB - 2019/09/12, HDFFV-10854)
-
-    - Added new chunk query functions
-
-      The following public functions were added to discover information about
-      the chunks in an HDF5 file.
-        herr_t H5Dget_num_chunks(dset_id, fspace_id, *nchunks)
-        herr_t H5Dget_chunk_info_by_coord(dset_id, *coord, *filter_mask, *addr, *size)
-        herr_t H5Dget_chunk_info(dset_id, fspace_id, index, *coord, *filter_mask, *addr, *size)
-
-      (BMR - 2019/06/11, HDFFV-10677)
-
-    - Improved the performance of virtual dataset I/O
-
-      Refactored the internal dataspace routines used by the virtual dataset
-      code to improve performance, especially when one of the selections
-      involved is very long and non-contiguous.
-
-      (NAF - 2019/05/31, HDFFV-10693)
-
-    - Added the ability to open files with UTF-8 file names on Windows.
-
-      The POSIX open(2) API call on Windows is limited to ASCII
-      file names. The library has been updated to convert incoming file
-      names to UTF-16 (via MultiByteToWideChar(CP_UTF8, ...) and use
-      _wopen() instead.
-
-     (DER - 2019/03/15, HDFFV-2714, HDFFV-3914, HDFFV-3895, HDFFV-8237, HDFFV-10413, HDFFV-10691)
-
-    - Add new API H5M for map objects.  Currently not supported by native
-      library, can be supported by VOL connectors.
-
-      (NAF - 2019/03/01)
-
-    - Add new H5R_ref_t type for object, dataset region and _attribute_
-      references. This new type will deprecate the current hobj_ref_t
-      and hdset_reg_ref_t types for references. Added H5T_REF datatype
-      to read and write new reference types. As opposed to previous
-      reference types, reference creation no longer modifies existing
-      files. New reference types also now support references to external
-      files.
-
-      (JS - 2019/10/08)
-
-    - Remove H5I_REFERENCE from the library
-
-      This ID class was never used by the library and has been removed.
-
-      (DER - 2018/12/08, HDFFV-10252)
-
-    - Allow pre-generated H5Tinit.c and H5make_libsettings.c to be used.
-
-      Rather than always running H5detect and generating H5Tinit.c and
-      H5make_libsettings.c, supply a location for those files.
-
-      (ADB - 2018/09/18, HDFFV-10332)
-
-
-    Parallel Library:
-    -----------------
-    - Changed the default behavior in parallel when reading the same dataset in its entirely
-      (i.e. H5S_ALL dataset selection) which is being read by all the processes collectively.
-      The dataset mush be contiguous, less than 2GB, and of an atomic datatype.
-      The new behavior is the HDF5 library will use an MPI_Bcast to pass the data read from
-      the disk by the root process to the remain processes in the MPI communicator associated
-      with the HDF5 file.
-
-      (MSB - 2019/01/02, HDFFV-10652)
+          - Install openssl library (with dev files);
+                from "Shining Light Productions". msi package preferred.
+          - PATH should have been updated with the installation dir.
+          - set ENV variable OPENSSL_ROOT_DIR to the installation dir.
+          - set ENV variable OPENSSL_CONF to the cfg file, likely %OPENSSL_ROOT_DIR%\bin\openssl.cfg
+          - Install libcurl library (with dev files);
+          - download the latest released version using git: https://github.com/curl/curl.git
+          - Open a Visual Studio Command prompt
+          - change to the libcurl root folder
+          - run the "buildconf.bat" batch file
+          - change to the winbuild directory
+          - nmake /f Makefile.vc mode=dll MACHINE=x64
+          - copy libcurl-vc-x64-release-dll-ipv6-sspi-winssl dir to C:\curl (installation dir)
+          - set ENV variable CURL_ROOT to C:\curl (installation dir)
+          - update PATH ENV variable to %CURL_ROOT%\bin (installation bin dir).
+          - the aws credentials file should be in %USERPROFILE%\.aws folder
+          - set the ENV variable HDF5_ROS3_TEST_BUCKET_URL to the s3 url for the 
+                s3 bucket containing the HDF5 files to be accessed.
+
+    Other improvements and changes:
+
+    - Hyperslab selection code was reworked to improve performance getting more 
+      than 10x speedup in some cases. 
+     
+    - The HDF5 Library was enhanced to open files with Unicode names on Windows.
+
+    - Deprecated H5Dvlen_reclaim() and replaced it with H5Treclaim().
+      This routine is meant to be used when resources are internally allocated
+      when reading data, i.e. when using either vlen or new reference types.
+      This is applicable to both attribute and dataset reads.
 
-    Fortran Library:
-    ----------------
-    - Added new Fortran derived type, c_h5o_info_t, which is interoperable with
-      C's h5o_info_t. This is needed for callback functions which
-      pass C's h5o_info_t data type definition.
-
-      (MSB, 2019/01/08, HDFFV-10443)
-
-    - Added new Fortran API, H5gmtime, which converts (C) 'time_t' structure
-      to Fortran DATE AND TIME storage format.
-
-      (MSB, 2019/01/08, HDFFV-10443)
-
-    - Added new Fortran 'fields' optional parameter to: h5ovisit_f, h5oget_info_by_name_f,
-      h5oget_info, h5oget_info_by_idx and h5ovisit_by_name_f.
-
-      (MSB, 2019/01/08, HDFFV-10443)
-
-    C++ Library:
-    ------------
-    - Added new wrappers for H5Pset/get_create_intermediate_group()
-        LinkCreatPropList::setCreateIntermediateGroup()
-        LinkCreatPropList::getCreateIntermediateGroup()
-
-      (BMR - 2019/04/22, HDFFV-10622)
-
-    - Added new wrapper for H5Ovisit2()
-          H5Object::visit()
-
-      (BMR - 2019/02/14, HDFFV-10532)
-
-
-    Java Library:
-    ----------------
-    - Fix a failure in JUnit-TestH5P on 32-bit architectures
-
-      (JTH - 2019/04/30)
-
-    - Duplicate the data read/write functions of Datasets for Attributes.
-
-      Region references could not be displayed for attributes as they could
-      for datasets. Datasets had overloaded read and write functions for different
-      datatypes that were not available for attributes. After adding similar
-      functions, attribute region references work normally.
-
-      (ADB - 2018/12/12, HDFVIEW-4)
-
-    - Removed H5I_REFERENCE from the Java wrappers
-
-      This ID class was never used by the library and has been removed
-      from the Java wrappers.
-
-      (DER - 2018/12/08, HDFFV-10252)
-
-
-    Tools:
-    ------
     - h5repack was fixed to repack datasets with external storage
       to other types of storage.
 
-      New test added to repack files and verify the correct data using h5diff.
-
-      (JS - 2019/09/25, HDFFV-10408)
-      (ADB - 2019/10/02, HDFFV-10918)
-
-    - h5dump was fixed for 128-bit floats, but was missing a test.
-
-      New test greps for the first 15 numbers of the 128-bit value.
-
-      (ADB - 2019/06/23, HDFFV-9407)
-
-
-    High-Level APIs:
-    ---------------
-    -
-
-    C Packet Table API
-    ------------------
-    -
-
-    Internal header file
-    --------------------
-    -
-
-    Documentation
-    -------------
-    -
 
 Support for new platforms, languages and compilers.
 =======================================
-    -
-
-Bug Fixes since HDF5-1.10.3 release
-==================================
-
-    Library
-    -------
-    - Fixed the iteration error in test_versionbounds() in test/dtypes.c
-
-      The test was supposed to loop through all valid combinations of 
-      low and high bounds in the array versions[], but they were set to
-      H5F_LIBVER_EARLIEST always without changing.
-
-      The problem was fixed by indexing low and high into the array versions[].
-
-      (VC - 2019/09/30)
-
-    - Fixed the slowness of regular hyperslab selection in a chunked dataset
-
-      It was reported that the selection of every 10th element from a 20G
-      chunked dataset was extremely slow and sometimes could hang the system.
-      The problem was due to the iteration and the building of the span tree
-      for all the selected elements in file space.
-
-      As the selected elements are going to a 1-d contiguous single block
-      memory space, the problem was fixed by building regular hyperslab selections
-      in memory space for the selected elements in file space.
-
-      (VC - 2019/09/26, HDFFV-10585)
-
-    - Fixed a bug caused by bad tag value when condensing object header
-      messages
-
-      There was an assertion failure when moving meessages from running a
-      user test program with library release hdf5.1.10.4. It was because
-      the tag value (object header's address) was not set up when entering
-      the library routine H5O__chunk_update_idx(), which will eventually
-      verifies the metadata tag value when protecting the object header.
-
-      The problem was fixed by replacing FUNC_ENTER_PACKAGE in H5O__chunk_update_idx()
-      with FUNC_ENTER_PACKAGE_TAG(oh->cache_info.addr) to set up the metadata tag.
-
-      (VC - 2019/08/23, HDFFV-10873)
-
-    - Fixed the test failure from test_metadata_read_retry_info() in
-      test/swmr.c
-
-      The test failure is due to the incorrect number of bins returned for
-      retry info (info.nbins).  The # of bins expected for 101 read attempts
-      is 3 instead of 2.  The routine H5F_set_retries() in src/H5Fint.c
-      calculates the # of bins by first obtaining the log10 value for
-      (read attempts - 1).  For PGI/19, the log10 value for 100 read attempts
-      is 1.9999999999999998 instead of 2.00000.  When casting the log10 value
-      to unsigned later on, the decimal part is chopped off causing the test
-      failure.
-
-      This was fixed by obtaining the rounded integer value (HDceil) for the
-      log10 value of read attempts first before casting the result to unsigned.
-
-      (VC - 2019/8/14, HDFFV-10813)
-
-    - Fixed an issue where creating a file with non-default file space info
-      together with library high bound setting to H5F_LIBVER_V18.
-
-      When setting non-default file space info in fcpl via
-      H5Pset_file_space_strategy() and then creating a file with
-      both high and low library bounds set to
-      H5F_LIBVER_V18 in fapl, the library succeeds in creating the file.
-      File creation should fail because the feature of setting non-default
-      file space info does not exist in library release 1.8 or earlier.
-
-      This was fixed by setting and checking the proper version in the
-      file space info message based on the library low and high bounds
-      when creating and opening the HDF5 file.
-
-      (VC - 2019/6/25, HDFFV-10808)
-
-    - When iterating over an old-style group (i.e., when not using the latest
-      file format) of size 0, a NULL pointer representing the empty links
-      table would be sent to qsort(3) for sorting, which is undefined behavior.
-
-      Iterating over an empty group is explicitly tested in the links test.
-      This has not caused any failures to date and was flagged by gcc's
-      -fsanitize=undefined.
-
-      The library no longer attempts to sort an empty array.
-
-      (DER - 2019/06/18, HDFFV-10829)
-
-    - Fixed an issue where copying a version 1.8 dataset between files using
-      H5Ocopy fails due to an incompatible fill version
-
-      When using the HDF5 1.10.x H5Ocopy() API call to copy a version 1.8
-      dataset to a file created with both high and low library bounds set to
-      H5F_LIBVER_V18, the H5Ocopy() call will fail with the error stack indicating
-      that the fill value version is out of bounds.
-
-      This was fixed by changing the fill value message version to H5O_FILL_VERSION_3
-      (from H5O_FILL_VERSION_2) for H5F_LIBVER_V18.
-
-      (VC - 2019/6/14, HDFFV-10800)
-
-    - Some oversights in the index iterating area of the library caused
-      a callback function to continue iterating even though it's supposed
-      to stop.
-
-      Added the returned value check to the for loop's conditions in
-      H5EA_iterate(), H5FA_iterate(), and H5D__none_idx_iterate().  The
-      iteration now stops when it should.
-
-      (BMR - 2019/06/11, HDFFV-10661)
-
-    - Fixed a bug that would cause an error or cause fill values to be
-      incorrectly read from a chunked dataset using the "single chunk" index if
-      the data was held in cache and there was no data on disk.
-
-      (NAF - 2019/03/06)
-
-    - Fixed a bug that could cause an error or cause fill values to be
-      incorrectly read from a dataset that was written to using H5Dwrite_chunk
-      if the dataset was not closed after writing.
-
-      (NAF - 2019/03/06, HDFFV-10716)
-
-    - Fixed memory leak in scale offset filter
-
-      In a special case where the MinBits is the same as the number of bits in
-      the datatype's precision, the filter's data buffer was not freed, causing
-      the memory usage to grow. In general the buffer was freed correctly.  The
-      Minbits are the minimal number of bits to store the data values.  Please
-      see the reference manual for H5Pset_scaleoffset for the detail.
-
-      (RL - 2019/3/4, HDFFV-10705)
-
-    - Fix hangs with collective metadata reads during chunked dataset I/O
+    - Added spectrum-mpi with clang, gcc and xl compilers on Linux 3.10.0
+    - Added OpenMPI 3.1 and 4.0 with clang, gcc and Intel compilers on Linux 3.10.0
+    - Added cray-mpich/PrgEnv with gcc and Intel compilers on Linux 4.14.180
+    - Added spectrum mpi with clang, gcc and xl compilers on Linux 4.14.0
+    
 
-      In the parallel library, it was discovered that when a particular
-      sequence of operations following a pattern of:
-
-      "write to chunked dataset" -> "flush file" -> "read from dataset"
-
-      occurred with collective metadata reads enabled, hangs could be
-      observed due to certain MPI ranks not participating in the collective
-      metadata reads.
-
-      To fix the issue, collective metadata reads are now disabled during
-      chunked dataset raw data I/O.
-
-      (JTH - 2019/02/11, HDFFV-10563, HDFFV-10688)
-
-    - Performance issue when closing an object
-
-      The slow down is due to the search of the "tag_list" to find
-      out the "corked" status of an object and "uncork" it if so.
-
-      Improve porformance by skipping the search of the "tag_list"
-      if there are no "corked" objects when closing an object.
-
-      (VC - 2019/2/6)
-
-    - Fixed a potential invalid memory access and failure that could occur when
-      decoding an unknown object header message (from a future version of the
-      library).
-
-      (NAF - 2019/01/07)
-
-    - Deleting attributes in dense storage
-
-      The library aborts with "infinite loop closing library" after
-      attributes in dense storage are created and then deleted.
-
-      When deleting the attribute nodes from the name index v2 B-tree,
-      if an attribute is found in the intermediate B-tree nodes,
-      which may be merged/redistributed in the process, we need to
-      free the dynamically allocated spaces for the intermediate
-      decoded attribute.
-
-      (VC - 2018/12/26, HDFFV-10659)
-
-    - Allow H5detect and H5make_libsettings to take a file as an argument.
-
-      Rather than only writing to stdout, add a command argument to name
-      the file that H5detect and H5make_libsettings will use for output.
-      Without an argument, stdout is still used, so backwards compatibility
-      is maintained.
-
-      (ADB - 2018/09/05, HDFFV-9059)
-
-    - A bug was discovered in the parallel library where an application
-      would hang if a collective read/write of a chunked dataset occurred
-      when collective metadata reads were enabled and some of the ranks
-      had no selection in the dataset's dataspace. The ranks which had no
-      selection in the dataset's dataspace called H5D__chunk_addrmap() to
-      retrieve the lowest chunk address in the dataset. This is because we
-      require reads/writes to be performed in strictly non-decreasing order
-      of chunk address in the file.
-
-      When the chunk index used was a version 1 or 2 B-tree, these
-      non-participating ranks would issue a collective MPI_Bcast() call
-      that the participating ranks would not issue, causing the hang. Since
-      the non-participating ranks are not actually reading/writing anything,
-      the H5D__chunk_addrmap() call can be safely removed and the address used
-      for the read/write can be set to an arbitrary number (0 was chosen).
-
-      (JTH - 2018/08/25, HDFFV-10501)
-
-    - fcntl(2)-based file locking incorrectly passed the lock argument struct
-      instead of a pointer to the struct, causing errors on systems where
-      flock(2) is not available.
-
-      File locking is used when files are opened to enforce SWMR semantics. A
-      lock operation takes place on all file opens unless the
-      HDF5_USE_FILE_LOCKING environment variable is set to the string "FALSE".
-      flock(2) is preferentially used, with fcntl(2) locks as a backup if
-      flock(2) is unavailable on a system (if neither is available, the lock
-      operation fails). On these systems, the file lock will often fail, which
-      causes HDF5 to not open the file and report an error.
-
-      This bug only affects POSIX systems. Win32 builds on Windows use a no-op
-      locking call which always succeeds. Systems which exhibit this bug will
-      have H5_HAVE_FCNTL defined but not H5_HAVE_FLOCK in the configure output.
-
-      This bug affects HDF5 1.10.0 through 1.10.5.
-
-      fcntl(2)-based file locking now correctly passes the struct pointer.
-
-      (DER - 2019/08/27, HDFFV-10892)
-
-
-    Java Library:
-    ----------------
-    - JNI native library dependencies
-
-      The build for the hdf5_java native library used the wrong
-      hdf5 target library for CMake builds. Correcting the hdf5_java
-      library to build with the shared hdf5 library required testing
-      paths to change also.
-
-      (ADB - 2018/08/31, HDFFV-10568)
-     - Java iterator callbacks
-
-      Change global callback object to a small stack structure in order
-      to fix a runtime crash. This crash was discovered when iterating
-      through a file with nested group members. The global variable
-      visit_callback is overwritten when recursion starts. When recursion
-      completes, visit_callback will be pointing to the wrong callback method.
-
-      (ADB - 2018/08/15, HDFFV-10536)
-
-    - Java HDFLibraryException class
-
-      Change parent class from Exception to RuntimeException.
-
-      (ADB - 2018/07/30, HDFFV-10534)
-
-    - JNI Read and Write
-
-      Refactored variable-length functions, H5DreadVL and H5AreadVL,
-      to correct dataset and attribute reads. New write functions,
-      H5DwriteVL and H5AwriteVL, are under construction.
-
-      (ADB - 2018/06/02, HDFFV-10519)
-
-    Configuration
-    -------------
-    - Correct option for default API version
-
-      CMake options for default API version are not mutually exclusive.
-      Change the multiple BOOL options to a single STRING option with the
-      strings; v16, v18, v110, v112.
-
-      (ADB - 2019/08/12, HDFFV-10879)
-
-    Performance
-    -------------
-    -
-
-    Fortran
-    --------
-    - Added symbolic links libhdf5_hl_fortran.so to libhdf5hl_fortran.so and
-      libhdf5_hl_fortran.a to libhdf5hl_fortran.a in hdf5/lib directory for
-      autotools installs.  These were added to match the name of the files
-      installed by cmake and the general pattern of hl lib files.  We will
-      change the names of the installed lib files to the matching name in
-      the next major release.
-
-      (LRK - 2019/01/04, HDFFV-10596)
-
-    - Made Fortran specific subroutines PRIVATE in generic procedures.
-
-      Effected generic procedures were functions in H5A, H5D, H5P, H5R and H5T.
-
-      (MSB, 2018/12/04, HDFFV-10511)
-
-    - Fixed issue with Fortran not returning h5o_info_t field values
-      meta_size%attr%index_size and  meta_size%attr%heap_size.
-
-      (MSB, 2018/1/8, HDFFV-10443)
-
-
-    Tools
-    -----
-    -
-
-    High-Level APIs:
-    ------
-    -
-
-    Fortran High-Level APIs:
-    ------
-    -
-
-    Documentation
-    -------------
-    -
-
-    F90 APIs
-    --------
-    -
-
-    C++ APIs
-    --------
-    -
-
-    Testing
-    -------
-    - Fixed a test failure in testpar/t_dset.c caused by
-      the test trying to use the parallel filters feature
-      on MPI-2 implementations.
-
-      (JTH, 2019/2/7)
-
-Bug Fixes since HDF5-1.10.2 release
+Major Bug Fixes since HDF5-1.10.0 release
 ==================================
 
-    Library
-    -------
-    - Java HDF5LibraryException class
-
-      The error minor and major values would be lost after the
-      constructor executed.
-
-      Created two local class variables to hold the values obtained during
-      execution of the constructor. Refactored the class functions to retrieve
-      the class values rather then calling the native functions.
-      The native functions were renamed and called only during execution
-      of the constructor.
-      Added error checking to calling class constructors in JNI classes.
-
-      (ADB - 2018/08/06, HDFFV-10544)
-
-    - Added checks of the defined MPI_VERSION to guard against usage of
-      MPI-3 functions in the Parallel Compression and "big Parallel I/O"
-      features when HDF5 is built with MPI-2. Previously, the configure
-      step would pass but the build itself would fail when it could not
-      locate the MPI-3 functions used.
-
-      As a result of these new checks, HDF5 can again be built with MPI-2,
-      but the Parallel Compression feature will be disabled as it relies
-      on the MPI-3 functions used.
-
-      (JTH - 2018/08/02, HDFFV-10512)
-
-    - User's patches: CVEs
-
-      The following patches have been applied:
-
-      CVE-2018-11202 - NULL pointer dereference was discovered in
-                       H5S_hyper_make_spans in H5Shyper.c (HDFFV-10476)
-        https://security-tracker.debian.org/tracker/CVE-2018-11202
-        https://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2018-11202
+    - For major bug fixes please see HISTORY-1_10_0-1_12_0.txt file
 
-      CVE-2018-11203 - A division by zero was discovered in
-                       H5D__btree_decode_key in H5Dbtree.c (HDFFV-10477)
-        https://security-tracker.debian.org/tracker/CVE-2018-11203
-        https://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2018-11203
-
-      CVE-2018-11204 - A NULL pointer dereference was discovered in
-                       H5O__chunk_deserialize in H5Ocache.c (HDFFV-10478)
-        https://security-tracker.debian.org/tracker/CVE-2018-11204
-        https://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2018-11204
-
-      CVE-2018-11206 - An out of bound read was discovered in
-                       H5O_fill_new_decode and H5O_fill_old_decode in H5Ofill.c
-                       (HDFFV-10480)
-        https://security-tracker.debian.org/tracker/CVE-2018-11206
-        https://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2018-11206
-
-      CVE-2018-11207 - A division by zero was discovered in
-                       H5D__chunk_init in H5Dchunk.c  (HDFFV-10481)
-        https://security-tracker.debian.org/tracker/CVE-2018-11207
-        https://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2018-11207
-
-      (BMR - 2018/7/22, PR#s: 1134 and 1139,
-       HDFFV-10476, HDFFV-10477, HDFFV-10478, HDFFV-10480, HDFFV-10481)
-
-    - H5Adelete
-
-      H5Adelete failed when deleting the last "large" attribute that
-      is stored densely via fractal heap/v2 b-tree.
-
-      After removing the attribute, update the ainfo message.  If the
-      number of attributes goes to zero, remove the message.
-
-      (VC - 2018/07/20, HDFFV-9277)
-
-    - A bug was discovered in the parallel library which caused partial
-      parallel reads of filtered datasets to return incorrect data. The
-      library used the incorrect dataspace for each chunk read, causing
-      the selection used in each chunk to be wrong.
-
-      The bug was not caught during testing because all of the current
-      tests which do parallel reads of filtered data read all of the data
-      using an H5S_ALL selection. Several tests were added which exercise
-      partial parallel reads.
-
-      (JTH - 2018/07/16, HDFFV-10467)
-
-    - A bug was discovered in the parallel library which caused parallel
-      writes of filtered datasets to trigger an assertion failure in the
-      file free space manager.
-
-      This occurred when the filter used caused chunks to repeatedly shrink
-      and grow over the course of several dataset writes. The previous chunk
-      information, such as the size of the chunk and the offset in the file,
-      was being cached and not updated after each write, causing the next write
-      to the chunk to retrieve the incorrect cached information and run into
-      issues when reallocating space in the file for the chunk.
-
-      (JTH - 2018/07/16, HDFFV-10509)
-
-    - A bug was discovered in the parallel library which caused the
-      H5D__mpio_array_gatherv() function to allocate too much memory.
-
-      When the function is called with the 'allgather' parameter set
-      to a non-true value, the function will receive data from all MPI
-      ranks and gather it to the single rank specied by the 'root'
-      parameter. However, the bug in the function caused memory for
-      the received data to be allocated on all MPI ranks, not just the
-      singular rank specified as the receiver. In some circumstances,
-      this would cause an application to fail due to the large amounts
-      of memory being allocated.
-
-      (JTH - 2018/07/16, HDFFV-10467)
-
-    - Error checks in h5stat and when decoding messages
-
-      h5stat exited with seg fault/core dumped when
-      errors are encountered in the internal library.
-
-      Add error checks and --enable-error-stack option to h5stat.
-      Add range checks when decoding messages: old fill value, old
-      layout and refcount.
-
-      (VC - 2018/07/11, HDFFV-10333)
-
-    - 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)
-
-    - Inappropriate linking with deprecated MPI C++ libraries
-
-      HDF5 does not define *_SKIP_MPICXX in the public headers, so applications
-      can inadvertently wind up linking to the deprecated MPI C++ wrappers.
-
-      MPICH_SKIP_MPICXX and OMPI_SKIP_MPICXX have both been defined in H5public.h
-      so this should no longer be an issue. HDF5 makes no use of the deprecated
-      MPI C++ wrappers.
-
-      (DER - 2019/09/17, HDFFV-10893)
-
-
-
-    Configuration
-    -------------
-    - Applied patches to address Cywin build issues
-
-      There were three issues for Cygwin builds:
-      - Shared libs were not built.
-      - The -std=c99 flag caused a SIG_SETMASK undeclared error.
-      - Undefined errors when buildbing test shared libraries.
-
-      Patches to address these issues were received and incorporated in this version.
-
-      (LRK - 2018/07/18, HDFFV-10475)
-
-    - 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)
-
-    - Reworked java test suite into individual JUnit tests.
-
-      Testing the whole suite of java unit tests in a single JUnit run
-      made it difficult to determine actual failures when tests would fail.
-      Running each file set of tests individually, allows individual failures
-      to be diagnosed easier. A side benefit is that tests for optional components
-      of the library can be disabled if not configured.
-
-      (ADB - 2018/05/16, HDFFV-9739)
-
-    - Converted CMake global commands ADD_DEFINITIONS and INCLUDE_DIRECTORIES
-      to use target_* type commands. This change modernizes the CMake usage
-      in the HDF5 library.
-
-      In addition, there is the intention to convert to generator expressions,
-      where possible. The exception is Fortran FLAGS on Windows Visual Studio.
-      The HDF macros TARGET_C_PROPERTIES and TARGET_FORTRAN_PROPERTIES have
-      been removed with this change in usage.
-
-      The additional language (C++ and Fortran) checks have also been localized
-      to only be checked when that language is enabled.
-
-      (ADB - 2018/05/08)
-
-    Performance
-    -------------
-    -
-
-    Fortran
-    --------
-    -
-
-    Tools
-    -----
-    -
-
-    High-Level APIs:
-    ------
-    -
-
-    Fortran High-Level APIs:
-    ------
-    -
-
-    Documentation
-    -------------
-    -
-
-    F90 APIs
-    --------
-    -
-
-    C++ APIs
-    --------
-    - Adding default arguments to existing functions
-
-      Added the following items:
-      + Two more property list arguments are added to H5Location::createDataSet:
-        const DSetAccPropList& dapl = DSetAccPropList::DEFAULT
-        const LinkCreatPropList& lcpl = LinkCreatPropList::DEFAULT
-
-      + One more property list argument is added to H5Location::openDataSet:
-        const DSetAccPropList& dapl = DSetAccPropList::DEFAULT
-
-      (BMR - 2018/07/21, PR# 1146)
-
-    - Improvement C++ documentation
-
-      Replaced the table in main page of the C++ documentation from mht to htm format
-      for portability.
-
-      (BMR - 2018/07/17, PR# 1141)
-
-    Testing
-    -------
-    - The dt_arith test failed on IBM Power8 and Power9 machines when testing
-      conversions from or to long double types, especially when special values
-      such as infinity or NAN were involved.  In some cases the results differed
-      by extremely small amounts from those on other machines, while some other
-      tests resulted in segmentation faults.  These conversion tests with long
-      double types have been disabled for ppc64 machines until the problems are
-      better understood and can be properly addressed.
-
-      (SRL - 2019/01/07, TRILAB-98)
 
 Supported Platforms
 ===================
@@ -981,11 +152,35 @@ Supported Platforms
     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)
-                                    Version 4.9.3, Version 5.2.0,
+                                    Version 4.9.3, 5.2.0, 7.1.0 
                                   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
+                                  MPICH 3.1.4 
+
+    Linux-3.10.0-                 spectrum-mpi/rolling-release with cmake>3.10 and
+    862.14.4.1chaos.ch6.ppc64le   clang/3.9,8.0
+    #1 SMP ppc64le GNU/Linux      gcc/7.3
+    (ray)                         xl/2016,2019
+
+    Linux 3.10.0-                 openmpi/3.1,4.0 with cmake>3.10 and
+    957.12.2.1chaos.ch6.x86_64    clang 5.0
+    #1 SMP x86_64 GNU/Linux       gcc/7.3,8.2
+    (serrano)                     intel/17.0,18.0/19.0
+
+    Linux 3.10.0-                 openmpi/3.1/4.0 with cmake>3.10 and
+    1062.1.1.1chaos.ch6.x86_64    clang/3.9,5.0,8.0
+    #1 SMP x86_64 GNU/Linux       gcc/7.3,8.1,8.2
+    (chama,quartz)                intel/16.0,18.0,19.0
+
+    Linux 4.4.180-94.100-default  cray-mpich/7.7.6 with PrgEnv-*/6.0.5, cmake>3.10 and
+    #1 SMP x86_64 GNU/Linux       gcc/7.2.0,8.2.0
+    (mutrino)                     intel/17.0,18.0
+ 
+    Linux 4.14.0-                 spectrum-mpi/rolling-release with cmake>3.10 and
+    49.18.1.bl6.ppc64le           clang/6.0,8.0
+    #1 SMP ppc64le GNU/Linux      gcc/7.3
+    (lassen)                      xl/2019
 
     SunOS 5.11 32- and 64-bit     Sun C 5.12 SunOS_sparc
     (emu)                         Sun Fortran 95 8.6 SunOS_sparc
@@ -993,8 +188,7 @@ Supported Platforms
 
     Windows 7                     Visual Studio 2015 w/ Intel Fortran 16 (cmake)
 
-    Windows 7 x64                 Visual Studio 2013
-                                  Visual Studio 2015 w/ Intel Fortran 16 (cmake)
+    Windows 7 x64                 Visual Studio 2015 w/ Intel Fortran 16 (cmake)
                                   Visual Studio 2015 w/ Intel C, Fortran 2018 (cmake)
                                   Visual Studio 2015 w/ MSMPI 8 (cmake)
 
@@ -1011,9 +205,13 @@ Supported Platforms
     64-bit                        gfortran GNU Fortran (GCC) 5.2.0
     (osx1011dev/osx1011test)      Intel icc/icpc/ifort version 16.0.2
 
-    Mac OS Sierra 10.12.6         Apple LLVM version 8.1.0 (clang/clang++-802.0.42)
-    64-bit                        gfortran GNU Fortran (GCC) 7.1.0
-    (swallow/kite)                Intel icc/icpc/ifort version 17.0.2
+    Mac OS High Sierra 10.13.6    Apple LLVM version 10.0.0 (clang/clang++-1000.10.44.4)
+    64-bit                        gfortran GNU Fortran (GCC) 6.3.0
+    (bear)                        Intel icc/icpc/ifort version 19.0.4
+
+    Mac OS Mojave 10.14.6         Apple LLVM version 10.0.1 (clang/clang++-1001.0.46.4)
+    64-bit                        gfortran GNU Fortran (GCC) 6.3.0
+    (bobcat)                      Intel icc/icpc/ifort version 19.0.4
 
 
 Tested Configuration Features Summary
@@ -1100,33 +298,11 @@ The following platforms are not supported but have been tested for this release.
                                   Intel(R) C (icc) and C++ (icpc) compilers
                                      Version 17.0.0.098 Build 20160721
                                   with NAG Fortran Compiler Release 6.1(Tozai)
-
-    Linux 3.10.0-327.10.1.el7     MPICH 3.2 compiled with GCC 5.3.0
-    #1 SMP x86_64 GNU/Linux
-    (moohan)
-
-    Linux 2.6.32-573.18.1.el6.ppc64  MPICH mpich 3.1.4 compiled with
-    #1 SMP ppc64 GNU/Linux           IBM XL C/C++ for Linux, V13.1
-    (ostrich)                        and IBM XL Fortran for Linux, V15.1
-
-    Debian 8.4 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1 x86_64 GNU/Linux
-                                  gcc, g++ (Debian 4.9.2-10) 4.9.2
-                                  GNU Fortran (Debian 4.9.2-10) 4.9.2
-                                  (cmake and autotools)
-
-    Fedora 24  4.7.2-201.fc24.x86_64 #1 SMP x86_64 x86_64 x86_64 GNU/Linux
-                                  gcc, g++ (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)
-
-    Ubuntu 16.04.1 4.4.0-38-generic #57-Ubuntu SMP x86_64 GNU/Linux
-                                  gcc, g++ (Ubuntu 5.4.0-6ubuntu1~16.04.2)
-                                      5.4.0 20160609
-                                  GNU Fortran (Ubuntu 5.4.0-6ubuntu1~16.04.2)
-                                      5.4.0 20160609
-                                  (cmake and autotools)
+                                  PGI C (pgcc), C++ (pgc++), Fortran (pgf90)
+                                  compilers:
+                                     Version 18.4, 19.4
+                                  MPICH 3.3
+                                  OpenMPI 2.1.5, 3.1.3, 4.0.0 
 
 
 Known Problems