v4.9.3

Known Issues

Parallel operation using mpich 4.2.0 (the default on Ubuntu 24.04) results in 'unexpected results' when running nc_test4/run_par_test.sh. This can be fixed by removing mpich and associated libraries and development packages and installing mpich 4.2.2 by hand, or by using openmpi provided via apt.

Release Notes

• Extend the netcdf API to support programmatic changes to the plugin search path. See Github #3034 for more information.

What's Changed

• "Simplify" XGetopt usage by @DennisHeimbigner in #2678
• Fix bug in szip handling. by @DennisHeimbigner in #2679
• Add documentation for logging by @edwardhartnett in #2677
• v4.9.2 Wellspring branch by @WardF in #2660
• Combine DAP4 test server fixes, resolve a couple conflicts. by @WardF in #2681
• Cleanup DAP4 testing by @DennisHeimbigner in #2555
• Fix DAP4 remotetest server by @DennisHeimbigner in #2558
• Fix issue #2674 by @uweschulzweida in #2675
• Check at nc_open if file appears to be in NCZarr/Zarr format. by @DennisHeimbigner in #2658
• Fix a syntax issue in CMakeLists.txt by @WardF in #2693
• hdf5open: check for the H5L info structure version directly by @mathstuf in #2695
• Improve S3 documentation, testing and support by @DennisHeimbigner in #2686
• Fix potential dead store by @ZhipengXue97 in #2644
• CI: Test --without-plugin-dir on Cygwin by @DWesl in #2659
• Fix handling of CURLOPT_CAINFO and CURLOPT_CAPATH by @DennisHeimbigner in #2690
• Adding a workaround for older versions of cmake by @WardF in #2703
• Remove obsolete code by @DennisHeimbigner in #2680
• Improve performance of the nc_reclaim_data and nc_copy_data functions. by @DennisHeimbigner in #2699
• CMakeLists.txt use ON vs yes, indent by @poelmanc in #2663
• Fix some dependency conditions between some ncdump tests. by @DennisHeimbigner in #2682
• awsincludes: remove executable permissions by @mathstuf in #2689
• Fix some problems with Earthdata authorization. by @DennisHeimbigner in #2709
• Provide a single option to disable all network access and testing. by @DennisHeimbigner in #2708
• Fix building on macOS by @skosukhin in #2710
• Update tinyxml and allow its use under OS/X. by @DennisHeimbigner in #2711
• Suppress filters on variables with non-fixed-size types. by @DennisHeimbigner in #2716
• Remove fortran bootstrap option by @WardF in #2707
• Add support for HDF5 transient types by @ZedThree in #2655
• Modify PR 2655 to ensure transient types have names. by @DennisHeimbigner in #2724
• Fix memory leak by @DennisHeimbigner in #2725
• Enable/Disable some plugins at configure time by @WardF in #2722
• Add capability to enable/disable compression libraries by @gsjaardema in #2712
• Release notes: Minor. Add historical tag, and spell fix. by @Dave-Allured in #2684
• Fix potential null dereference by @ZhipengXue97 in #2646
• Fix a crash when accessing a corrupted classic file. by @DennisHeimbigner in #2732
• Explicitly suppress variable length type compression by @DennisHeimbigner in #2730
• Cleanup the handling of cache parameters. by @DennisHeimbigner in #2734
• Fix a number of minor bugs by @DennisHeimbigner in #2726
• Fix major bug in the NCZarr cache management by @DennisHeimbigner in #2737
• Fix --has-quantize in autotools-generated nc-config. by @WardF in #2749
• Fix an issue with unescaped paths in the build system by @weiznich in #2756
• Mitigate S3 test interference + Unlimited Dimensions in NCZarr by @DennisHeimbigner in #2755
• Fix cmake s3 support.wif by @WardF in #2741
• CMake: Ensure all libraries link against MPI if needed by @ZedThree in #2758
• CMake: Change header in check for HDF5 zlib/szip support by @ZedThree in #2757
• Updated static software.html page with reference to met.3d by @WardF in #2760
• Revert a change made in d3c2cf2 that is proving confounding in MSYS2 bash by @WardF in #2769
• Address Windows and MacOS s3 issues by @WardF in #2759
• Fix bug with displaying log messages by @ZedThree in #2767
• Add ctest script to CI. by @WardF in #2778
• CI: Have nc-autotools use source distribution instead of repository by @DWesl in #2601
• Added stanza to workflow actions so that pushed changes cancel tests by @WardF in #2779
• netCDFConfig: find HDF5 if needed by @mathstuf in #2751
• Cleanup a number of issues. by @DennisHeimbigner in #2763
• CMake: Don't add uninstall target and CPack config if not top-level by @ZedThree in #2776
• Replace exec_program with execute_process by @WardF in #2784
• Fix Proxy problem for DAP2 by @DennisHeimbigner in #2764
• Remove stray character in cmake lfs tests for nczarr. by @WardF in #2786
• Renamed mmap variable, which conflicts with mmap() function on FreeBSD by @seanm in #2790
• Make ncZarr-specific deps and options dependent on ncZarr being enabled. by @WardF in #2793
• Fix most float conversion warnings by @ZedThree in #2782
• Fixed various UBSan warnings about invalid bit shifting by @seanm in #2787
• disable test that depends on ncpathcvt in cmake build w/o utilities by @tbussmann in #2795
• Update internal tinyxml2 code to the latest version by @DennisHeimbigner in #2771
• Remove the execinfo capability by @DennisHeimbigner in #2789
• Fixed various UBSan warnings about working with NULL pointers by @seanm in #2803
• Improve fetch performance of DAP4 by @DennisHeimbigner in #2765
• Fixed misaligned memory access flagged by UBSan by @seanm in #2800
• Tweaking PR to work with Visual Studio by @WardF in #2788
• CMake: Use helper libraries for nczarr tests by @ZedThree in #2783
• Fixed various UBSan warnings about working with NULL pointers by @seanm in #2802
• Fix some important bugs in various files by @DennisHeimbigner in #2813
• Removed a use of sprintf that required changing a function signature by @seanm in #2743
• sprintf -> snprintf by @seanm in #2691
• chore: unset executable flag by @e-kwsm in #2745
• Fix nc-config generated by cmake. by @WardF in #2825
• Do not compile test program unless required by @magnusuMET in #2761
• CMake: Add improvements to MPI support by @johnwparent in #2595
• Catching up on PRs by @WardF in #2826
• Minor fix to doxygen documentation by @gsjaardema in #2450
• Enable compilation with C89 compiler by @gsjaardema in #2379
• count argument in H5Sselect_hyperslab by @wkliao in #2296
• Changed link to netCDF-Fortran documentation. by @WardF in #2830
• Avoid segfault if opening file failed by @rouault in #2427
• Add clarification for the meaning of NSB by @rkouznetsov in #2388
• Add H5FD_http_finalize function and call on hdf5 finalize by @lostbard in #2827
• Reduce warning by changing type of NC_OBJ.id. by @DennisHeimbigner in #2781
• Replaced ancient K&R function declarations to be C23 compatible by @seanm in #2801
• add new compression to bm_file benchmark by @edwardhartnett in #2821
• Fix doxygen warnings by @WardF in #2834
• Fix szip linking by @mwestphal in #2833
• Silence conversion warnings from malloc arguments by @ZedThree in #2809
• Use explicit casts in nc4_convert_type to silence warnings by @ZedThree in #2808
• Manage project version with cmake by @K20shores in #2835
• Define USE_SZIP variable for nc-config.cmake.in by @islas in #2836
• Place dependencies into separate file by @K20shores in #2838
• Macros functions by @K20shores in #2842
• CMake: Find HDF5 header we can safely include for other checks by @ZedThree in #2762
• Rebase #2812 by @WardF in #2844
• Silence sign conversion warnings from NClist functions by @ZedThree in #2812
• CMake: Add support for UNITY_BUILD by @jschueller in #2839
• Fix warnings in NCZarr tests by @ZedThree in #2816
• Link against internally defined libraries by @islas in #2837
• Fix some variable types. Resolves #2849 by @opoplawski in #2850
• Add citation.cff file by @WardF in #2853
• Minor -- fix UNset to unset by @gsjaardema in #2856
• Update bundled utf8proc to 2.9.0 by @ZedThree in #2857
• CMake: Export targets so the build directory can be used directly by @ZedThree in #2774
• Modernize Doxygen CSS by @WardF in #2860
• Fix Windows export by @WardF in #2861
• Silence ncdump warnings by @ZedThree in #2840
• Adopt more modern style for doxygen-generated documentation. by @WardF in #2864
• Add static build to one-off GitHub Actions testing. by @WardF in #2866
• Fixes finding HDF5 header by @Julius-Plehn in #2867
• Properly handle missing regions in URLS by @DennisHeimbigner in #2819
• fix cmake build with ENABLE_HDF4 and hdf requiring jpeg by @aumuell in #2879
• Revert "fix cmake build with ENABLE_HDF4 and hdf requiring jpeg" by @WardF in #2882
• Use cmake netCDF with target_* for many options by @K20shores in #2847
• Pull out FindPNETCDF CMake module by @ZedThree in #2841
• CI: Fix version of HDF5 used in one-off test by @ZedThree in #2885
• Fix for H5Literate() callback versioning by @derobins in #2888
• Silence conversion warnings in libsrc4 by @ZedThree in #2892
• Remove now unused cmake by @K20shores in #2890
• Prefix all options with NETCDF_ by @K20shores in #2895
• Fix most warnings in dumplib.c by @ZedThree in #2814
• Silence most warnings in libhdf5 by @ZedThree in #2874
• Silence warnings in oc2 by @ZedThree in #2891
• CMake: Add option to always automatically regenerate ncgen source by @ZedThree in #2822
• Silence most warnings in libsrc by @ZedThree in #2883
• Fix warnings in tests and examples by @ZedThree in #2884
• Fix warnings from backwards-loops by @ZedThree in #2899
• Modernize CURL in netCDF cmake by @WardF in #2904
• Misc clang-tidy fixes, and added a .clang-tidy config file by @seanm in #2875
• Rename the vendored strlcat symbol by @weiznich in #2906
• Remove superflous check for libcurl by @WardF in #2907
• Fix warnings in ncgen3 by @ZedThree in #2900
• Add CI for a Windows Runner on Github Actions. by @WardF in #2910
• Fix conversion warnings in libdispatch by @ZedThree in #2905
• Refactor _FillValue macro by @WardF in #2911
• Fix warnings in ncgen by @ZedThree in #2897
• Re-introduce targets into netCDFConfig.cmake.in by @WardF in #2912
• changes associated with the removal of the Unidata ftp site. by @oxelson in #2915
• CMake: Enable plugins on MinGW by @MehdiChinoune in #2914
• Modify ncdump to print char-valued variables as utf8. by @DennisHeimbigner in #2921
• Honor CMAKE_INSTALL_MANDIR by @WardF in #2922
• Convert the ENABLE_XXX options to NETCDF_ENABLE_XXX options for NCZarr by @DennisHeimbigner in #2923
• ftp --> resources, part II by @oxelson in #2924
• CI: Setup a CMake job for MSYS2/MinGW by @MehdiChinoune in #2917
• Fix all warnings in ncdap4 by @ZedThree in #2898
• Cleanup various obsolete build issues by @DennisHeimbigner in #2926
• Fix duplicate definition when using aws-sdk-cpp. by @DennisHeimbigner in #2928
• Fix a few issues related to detection of libhdf4. by @WardF in #2933
• Cleanup handling of NETCDF_ENABLE_SET_LOG_LEVEL and NETCDF_ENABLE_SET_LOG_LEVEL_FUNC by @DennisHeimbigner in #2931
• Add compiler flag to fix infinities issue with intel compilers. by @WardF in #2935
• Fix some warnings in cmake by @DennisHeimbigner in #2940
• Clean up some inconsistencies in filter documentation by @gsjaardema in #2943
• Different method for checking HDF5 version requirement by @gsjaardema in #2942
• Fix ordering in CMakeLists.txt by @gsjaardema in #2941
• Fix cmake-based libnetcdf.settings.in by @WardF in #2944
• CI: Add Cygwin CMake run by @DWesl in #2930
• Convert NCzarr meta-data to use only Zarr attributes by @DennisHeimbigner in #2936
• Fix: CMAKE_MODULE_PATH contents is being overriden with -D contents, not merged with by @gorloffslava in #2946
• Propegate change to metadata and use of anonymous dimensions to NCZarr test by @WardF in #2949
• S3 Mode url reconstruction defaults to wrong server type by @mannreis in #2947
• Fix most warnings in libdap2 by @ZedThree in #2887
• Check if HDF5 "file" is a DAOS object by @brtnfld in #2021
• Add stanza for Release Candidate 1 in Release Notes by @WardF in #2934
• Provide Documentation for the .rc File Mechanism and API by @DennisHeimbigner in #2956
• Now use H5Literate2() instead of H5Literate() when its available by @edwardhartnett in #2958
• Some debugging output was left enabled by accident. by @DennisHeimbigner in #2970
• fix ncuriparse error,Correctly remove leading and trailing whitespace by @ShawayL in #2971
• add autotools build instructions, add parallel I/O build and plugin info to CMake build document by @edwardhartnett in #2964
• Expand logic around H5Literate2 data structure use. by @WardF in #2977
• fixed --with-plugin-dir option to match cmake behavior by @edwardhartnett in #2973
• updated README with install documentation by @edwardhartnett in #2975
• added NETCDF_MPIEXEC option to CMake by @edwardhartnett in #2979
• Fix bug in run_newformat.sh by @DennisHeimbigner in #2978
• Take into account that attach_dimscales can fail when dimensions and variables are named inconsistently by @Alexander-Barth in #2968
• Add zstd test and fix plugin build for CMake/Cygwin by @edwardhartnett in #2985
• fixed message commands in CMakeLists.txt, and ncdump dependency problems for tst_nccopy4 in CMake build by @edwardhartnett in #2983
• added documentation for start/count/stride mandating same size arrays as data variable by @edwardhartnett in #2981
• [S3] Parse AWS configuration with support for profile section by @mannreis in #2969
• Clean up some - vs _ in some comments by @gsjaardema in #2988
• added documentation about reading an unknown netCDF/HDF5 file in tutorial, and some other documentation fixes by @edwardhartnett in #2986
• Add two missing includes by @weiznich in #2991
• turned on some commented out test code by @edwardhartnett in #2993
• now install m4 on macos in CI by @edwardhartnett in #2998
• Bump incorrect minimum HDF5 version to 1.8.15. by @WardF in #3009
• fixed some autoreconf warnings by @edwardhartnett in #3008
• adding more zstd testing by @edwardhartnett in #2996
• Bump minimum required version of hdf5 in CMakeLists.txt by @WardF in #3011
• H5FDunregister plus tests by @WardF in #3014
• test to catch the HDF5 H5FDUnregister() problem... by @edwardhartnett in #3012
• Address ordering issue with HTTP VFD, H5FDunregister by @WardF in #3013
• parallel zstd test which works for cmake and autotools by @edwardhartnett in #3005
• HDF5 testing for parallel I/O including zstd (when present) by @edwardhartnett in #3002
• Check for libcurl should only happen if DAP and/or ncZarr are enabled. by @WardF in #3018
• Added information re: mpich version 4.2.0 and related 'error' messages. by @WardF in #3023
• Add legacy macro option by @WardF in #3030
• Fix in support of #3007 by @WardF in #3035
• If libZstd isn't found, turn off netcdf_enable_filter_zstd by @WardF in #3036
• Modify nc-config --libs and --static arguments by @WardF in #3037
• Fix failing building with custom libzip by @mannreis in #3040
• Cleanup the blosc testing in nc_test4 and nczarr_test. by @DennisHeimbigner in #3046
• Replace PR #3046 by @DennisHeimbigner in #3047
• fixing some autoconf problems by @edwardhartnett in #3022
• autoconf cleanup by @edwardhartnett in #3019
• Extend the netcdf API to support programmatic changes to the plugin search path by @DennisHeimbigner in #3034
• Update nc-config in support of changes made in #3034 by @WardF in #3049
• Various clang warning fixes by @seanm in #3050
• Quick warning fix plugin/CMakeLists.txt by @mannreis in #3053
• Simplify FORTRAN access to the new plugin path mechanism by @DennisHeimbigner in #3058
• CMAKE: Address #3055 - install plugins filters by @mannreis in #3056
• v4.9.3-rc2 wellspring changes by @WardF in #3052
• Update upload-artifact/download-artifact for github actions by @WardF in #3065
• Fix out-of-tree builds generating netcdf_json.h and netcdf_proplist.h by @opoplawski in #3060
• Update error code list. by @WardF in #3073
• Capture ac-based log artifacts by @WardF in #3074
• Clean up a couple small things while I'm looking at them. by @WardF in #3076
• Update default_chunk_cache_size by @WardF in #3077
• Restore missing --has-nc4 by @WardF in #3082

New Contributors

• @uweschulzweida made their first contribution in #2675
• @ZhipengXue97 made their first contribution in #2644
• @poelmanc made their first contribution in #2663
• @weiznich made their first contribution in #2756
• @tbussmann made their first contribution in #2795
• @e-kwsm made their first contribution in #2745
• @johnwparent made their first contribution in #2595
• @lostbard made their first contribution in #2827
• @K20shores made their first contribution in #2835
• @islas made their first contribution in #2836
• @Julius-Plehn made their first contribution in #2867
• @aumuell made their first contribution in #2879
• @derobins made their first contribution in #2888
• @MehdiChinoune made their first contribution in #2914
• @gorloffslava made their first contribution in #2946
• @mannreis made their first contribution in #2947
• @ShawayL made their first contribution in #2971

Full Changelog: v4.9.2...tmp-tag