mirror of https://gitee.com/openkylin/hdf5.git
419e47e85e
Package: libhdf5-100 Version: 1.10.0-patch1+docs-3 Tags: upstream patch User: debian-sparc@lists.debian.org Usertags: sparc64 X-Debbugs-Cc: debian-sparc@lists.debian.org, Ghislain Vaillant <ghisvail@gmail.com> Control: affects -1 src:h5py Hi, Currently libhdf5-100 performs unaligned memory accesses on sparc64 in certain cases, and this is causing the latest version of h5py to FTBFS due to the test suite being killed with SIGBUS when doing vlen-related tests (the tests in question being new in the latest upstream version). On investigating, there are two issues: 1. NO_ALIGNMENT_RESTRICTIONS is being defined on sparc64. GCC is sufficiently smart to notice that the test program run when configuring is performing unaligned accesses, and so instead of using the usual multi-byte load instructions (which require the address to be aligned), it expands it out into individual byte loads, and therefore the test actually succeeds. This is only because GCC can statically determine that the address is unaligned, and therefore tries to be helpful (since it knows using multi-byte loads will never work), whereas for a general address it will assume the address is aligned and emit a single multi-byte load. Adding in a few volatile qualifiers in the important places ensures that GCC can no longer statically prove the relevant addresses are unaligned, and therefore it uses the normal multi-byte load instructions and the test program will crash, so configure knows not to define NO_ALIGNMENT_RESTRICTIONS. 2. Even with that fixed, H5T_vlen_reclaim_recurse needs fixing to ensure it doesn't perform unaligned accesses when not supported. With the attached patch, h5py's test suite now passes again. Please feel free to forward this patch upstream if you deem it acceptable. Regards, James Gbp-Pq: Name fix-unaligned-accesses.patch |
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README.txt
HDF5 version 1.10.4 released on 2018-10-05
------------------------------------------------------------------------------
Please refer to the release_docs/INSTALL file for installation instructions.
------------------------------------------------------------------------------
THE HDF GROUP
---------------
The HDF Group is the developer of HDF5®, a high-performance software library and
data format that has been adopted across multiple industries and has become a
de facto standard in scientific and research communities.
More information about The HDF Group, the HDF5 Community and the HDF5 software
project, tools and services can be found at the Group's website.
https://www.hdfgroup.org/
DOCUMENTATION
-------------
This release is fully functional for the API described in the documentation.
https://portal.hdfgroup.org/display/HDF5/The+HDF5+API
Full Documentation and Programming Resources for this release can be found at
https://portal.hdfgroup.org/display/HDF5
See the RELEASE.txt file in the release_docs/ directory for information specific
to the features and updates included in this release of the library.
Several more files are located within the release_docs/ directory with specific
details for several common platforms and configurations.
INSTALL - Start Here. General instructions for compiling and installing the library
INSTALL_CMAKE - instructions for building with CMake (Kitware.com)
INSTALL_parallel - instructions for building and configuring Parallel HDF5
INSTALL_Windows and INSTALL_Cygwin - MS Windows installations.
HELP AND SUPPORT
----------------
Information regarding Help Desk and Support services is available at
https://portal.hdfgroup.org/display/support/The+HDF+Help+Desk
FORUM and NEWS
--------------
The following public forums are provided for public announcements and discussions
of interest to the general HDF5 Community.
Homepage of the Forum
https://forum.hdfgroup.org
News and Announcement
https://forum.hdfgroup.org/c/news-and-announcements-from-the-hdf-group
HDF5 and HDF4 Topics
https://forum.hdfgroup.org/c/hdf5
These forums are provided as an open and public service for searching and reading.
Posting requires completing a simple registration and allows one to join in the
conversation. Please read the following instructions pertaining to the Forum's
use and configuration
https://forum.hdfgroup.org/t/quickstart-guide-welcome-to-the-new-hdf-forum
SNAPSHOTS, PREVIOUS RELEASES AND SOURCE CODE
--------------------------------------------
Periodically development code snapshots are provided at the following URL:
https://gamma.hdfgroup.org/ftp/pub/outgoing/hdf5/snapshots/
Source packages for current and previous releases are located at:
https://portal.hdfgroup.org/display/support/Downloads
Development code is available at our BitBucket Server:
https://bitbucket.hdfgroup.org/projects/HDFFV/repos/hdf5/browse