Hello everyone,

A pre-release version of HDF5 1.8.19 is available for testing and can be 
downloaded from the following link:

https://gamma.hdfgroup.org/ftp/pub/outgoing/hdf5

For more information about the release see 
https://gamma.hdfgroup.org/ftp/pub/outgoing/hdf5/hdf5-1.8.19-pre1-RELEASE.txt.

If you have time to test this release candidate, we would greatly appreciate 
it. We test HDF5 on a variety of platforms and with multiple compilers, but 
there is always a system that we couldn't test on. Your feedback is critical.

We have decided to streamline our release process for this release of HDF5 1.8 
software.  For those who use autotools to build HDF5, the default configuration 
build mode for this distribution is "production", as it will be for the 
official release.  For the last several releases we have released a pre1 
version with default build mode "development" followed by a switch to default 
build mode "production" for a pre2 version and for the official release.  This 
was done to catch any bugs that are exposed in "development" mode but not in 
production mode.  The same purpose can be satisfied with only one pre-release 
version (and one download) by building and testing the software a second time 
with the additional configure option "--disable-production". Please test both 
build modes if possible.

The shared library version numbers for lib.so.* files in HDF5 1.8.19-pre1 have 
been updated according to libtool's versioning system and the changes in 
symbols from HDF5 1.8.18. The API compatibility report is at this link:  
https://gamma.hdfgroup.org/ftp/pub/outgoing/hdf5/hdf5-1.8.19-pre1-interface_compatibility_report.

 Your prompt reports of any issues found will be invaluable and very much 
appreciated. Thank you and happy testing!

Larry

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Larry Knox  The HDF Group  http://hdfgroup.org
1800 So. Oak St., Suite 203, Champaign IL 61820
217.531.6101
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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