Release of HDF5-1.8.20 (Newsletter #159)


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                        Newsletter \#159
                       November 30, 2017

Release of HDF5-1.8.20

The HDF5-1.8.20 release is now available. It can be obtained from The HDF Group Support Download page:

   https://support.hdfgroup.org/downloads/

It can also be obtained directly from:

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

HDF5-1.8.20 is a minor release with a few new features and changes. Important changes include:

. An issue with H5Zfilter_avail was fixed where it was not finding available plugins.

. Improvements were made to the h5repack, h5ls, h5dump, h5diff, and h5import utilities.

  In particular, please be aware that the behavior of the h5repack utility changed.
  
  A parameter was added to the "UD=" option of h5repack to allow the user defined filter flag to be changed to either H5Z_FLAG_MANDATORY (0) or H5Z_FLAG_OPTIONAL (1).

  An example of the command with the new parameter is shown here:
         h5repack -f UD=307,0,1,9 h5repack_layout.h5 out.h5repack_layout.h5

  Previously, the command would have been:
         h5repack -f UD=307,1,9 h5repack_layout.h5 out.h5repack_layout.h5

. Support for the NAG compiler was added.

. Many C++ APIs were added or modified to better reflect the HDF5 model.

This release contains many other changes that are not listed here. Please be sure to read the https://support.hdfgroup.org/ftp/HDF5/releases/hdf5-1.8/hdf5-1.8.20/src/hdf5-1.8.20-RELEASE.txt for a comprehensive list of new features and changes.

Changes that affect maintainers of HDF5-dependent applications are listed on the https://support.hdfgroup.org/HDF5/doc1.8/ADGuide/Changes.html page.

Future Changes to Supported Compilers

Please be aware that the minimum supported CMake version will be changing in the next release to CMake 3.8 or greater.