HDF5 version 1.12.1-1 currently under development ================================================================================ INTRODUCTION 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 the release. Links to HDF5 documentation can be found on The HDF5 web page: https://portal.hdfgroup.org/display/HDF5/HDF5 The official HDF5 releases can be obtained from: https://www.hdfgroup.org/downloads/hdf5/ More information about the new features can be found at: 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: help@hdfgroup.org CONTENTS - New Features - Support for new platforms and languages - Bug Fixes since HDF5-1.12.0-alpha1 - Major Bug Fixes since HDF5-1.10.0 - Supported Platforms - Tested Configuration Features Summary - More Tested Platforms - Known Problems - CMake vs. Autotools installations New Features ============ Configuration: ------------- - CMake option to use AEC (open source SZip) library instead of SZip The open source AEC library is a replacement library for SZip. In order to use it for hdf5 the libaec CMake source was changed to add "-fPIC" and exclude test files. Autotools does not build the compression libraries within hdf5 builds. New option USE_LIBAEC is required to compensate for the different files produced by AEC build. (ADB - 2020/04/22, OESS-65) - CMake ConfigureChecks.cmake file now uses CHECK_STRUCT_HAS_MEMBER Some handcrafted tests in HDFTests.c has been removed and the CMake CHECK_STRUCT_HAS_MEMBER module has been used. (ADB - 2020/03/24, TRILAB-24) - Both build systems use same set of warnings flags GNU C, C++ and gfortran warnings flags were moved to files in a config sub-folder named gnu-warnings. Flags that only are available for a specific version of the compiler are in files named with that version. Clang C warnings flags were moved to files in a config sub-folder named clang-warnings. Intel C, Fortran warnings flags were moved to files in a config sub-folder named intel-warnings. There are flags in named "error-xxx" files with warnings that may be promoted to errors. Some source files may still need fixes. There are also pairs of files named "developer-xxx" and "no-developer-xxx" that are chosen by the CMake option:HDF5_ENABLE_DEV_WARNINGS or the configure option:--enable-developer-warnings. In addition, CMake no longer applies these warnings for examples. (ADB - 2020/03/24, TRILAB-192) Library: -------- - Added two new API routines for tracking library memory use: H5get_alloc_stats() and H5get_free_list_sizes(). (QAK - 2020/03/25) Java Library: ---------------- Tools: ------ Support for new platforms, languages and compilers. ======================================= Bug Fixes since HDF5-1.12.0 release ================================== Library ------- - Streamline I/O to a single element, improving performance for record appends to chunked datasets. (QAK - 2020/06/11) - Remove redundant tagging of metadata cache entries for some chunked dataset operations, slightly improving performance for chunked datasets. (QAK - 2020/06/10) - Better detect selections with the same shape, improving performance for some uses of H5DOappend (and other situations). (QAK - 2020/06/07) - Don't allocate an empty (0-dimensioned) chunked dataset's chunk index, until the dataset's dimensions are increased. (QAK - 2020/05/07) Tools: ------ Fortran API ----------- - Fixed configure issue when building HDF5 with NAG Fortran 7.0. HDF5 now accounts for the addition of half-precision floating-point in NAG 7.0 with a KIND=16. (MSB - 2020/02/28, HDFFV-11033) High-Level Library ------------------ - Eliminated unnecessary code in H5DOappend(), improving its performance. (QAK - 2020/06/05) Supported Platforms =================== Linux 2.6.32-696.16.1.el6.ppc64 gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18) #1 SMP ppc64 GNU/Linux g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18) (ostrich) GNU Fortran (GCC) 4.4.7 20120313 (Red Hat 4.4.7-18) 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) 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 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 Sun C++ 5.12 SunOS_sparc Windows 7 x64 Visual Studio 2015 w/ Intel C, Fortran 2018 (cmake) Visual Studio 2015 w/ MSMPI 10 (cmake) Windows 10 x64 Visual Studio 2015 w/ Intel Fortran 18 (cmake) Visual Studio 2017 w/ Intel Fortran 19 (cmake) Visual Studio 2019 w/ Intel Fortran 19 (cmake) 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 10.11.6 Apple clang/clang++ version 7.3.0 from Xcode 7.3 64-bit gfortran GNU Fortran (GCC) 5.2.0 (osx1011dev/osx1011test) Intel icc/icpc/ifort version 16.0.2 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 ===================================== 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 = 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 y 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 ? Mac OS X Yosemite 10.10.5 64-bit n y/y n y y ? Mac OS X El Capitan 10.11.6 64-bit n y/y n y y ? CentOS 6.7 Linux 2.6.18 x86_64 GNU n y/y n y y y CentOS 6.7 Linux 2.6.18 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 7.2 Linux 2.6.32 x86_64 GNU y y/y y y y y CentOS 7.2 Linux 2.6.32 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 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 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 Mac OS X El Capitan 10.11.6 64-bit y n y y CentOS 6.7 Linux 2.6.18 x86_64 GNU y y y y CentOS 6.7 Linux 2.6.18 x86_64 Intel y y y n CentOS 6.7 Linux 2.6.32 x86_64 PGI y y y n CentOS 7.2 Linux 2.6.32 x86_64 GNU y y y n CentOS 7.2 Linux 2.6.32 x86_64 Intel y y y n Linux 2.6.32-573.18.1.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 2.6.32-573.22.1.el6 GNU C (gcc), Fortran (gfortran), C++ (g++) #1 SMP x86_64 GNU/Linux compilers: (mayll/platypus) Version 4.4.7 20120313 Version 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 20170411 MPICH 3.1.4 compiled with GCC 4.9.3 Linux 3.10.0-327.18.2.el7 GNU C (gcc) and C++ (g++) compilers #1 SMP x86_64 GNU/Linux Version 4.8.5 20150623 (Red Hat 4.8.5-4) (jelly) with NAG Fortran Compiler Release 6.1(Tozai) GCC Version 7.1.0 OpenMPI 3.0.0-GCC-7.2.0-2.29 Intel(R) C (icc) and C++ (icpc) compilers Version 17.0.0.098 Build 20160721 with NAG Fortran Compiler Release 6.1(Tozai) 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 Fedora30 5.3.11-200.fc30.x86_64 #1 SMP x86_64 GNU/Linux GNU gcc (GCC) 9.2.1 20190827 (Red Hat 9.2.1 20190827) GNU Fortran (GCC) 9.2.1 20190827 (Red Hat 9.2.1 20190827) (cmake and autotools) Known Problems ============== CMake files do not behave correctly with paths containing spaces. Do not use spaces in paths because the required escaping for handling spaces results in very complex and fragile build files. ADB - 2019/05/07 At present, metadata cache images may not be generated by parallel applications. Parallel applications can read files with metadata cache images, but since this is a collective operation, a deadlock is possible if one or more processes do not participate. 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. CMake vs. Autotools installations ================================= While both build systems produce similar results, there are differences. Each system produces the same set of folders on linux (only CMake works on standard Windows); bin, include, lib and share. Autotools places the COPYING and RELEASE.txt file in the root folder, CMake places them in the share folder. The bin folder contains the tools and the build scripts. Additionally, CMake creates dynamic versions of the tools with the suffix "-shared". Autotools installs one set of tools depending on the "--enable-shared" configuration option. build scripts ------------- Autotools: h5c++, h5cc, h5fc CMake: h5c++, h5cc, h5hlc++, h5hlcc The include folder holds the header files and the fortran mod files. CMake places the fortran mod files into separate shared and static subfolders, while Autotools places one set of mod files into the include folder. Because CMake produces a tools library, the header files for tools will appear in the include folder. The lib folder contains the library files, and CMake adds the pkgconfig subfolder with the hdf5*.pc files used by the bin/build scripts created by the CMake build. CMake separates the C interface code from the fortran code by creating C-stub libraries for each Fortran library. In addition, only CMake installs the tools library. The names of the szip libraries are different between the build systems. The share folder will have the most differences because CMake builds include a number of CMake specific files for support of CMake's find_package and support for the HDF5 Examples CMake project.