Autotools fixes

[ajelenak]

This is PR #202 without the changes in the LZ4 plugin because those changed the plugin's cd_values[].

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Important

Update autotools configurations, plugin paths, and add test scripts for BZIP2, JPEG, LZ4, and LZF plugins.

• Autoconf Updates:
  • Update AC_PREREQ to 2.71 in BZIP2/configure.ac, JPEG/configure.ac, LZ4/configure.ac, and LZF/configure.ac.
  • Change AC_INIT and AC_CONFIG_HEADERS syntax in BZIP2/configure.ac, JPEG/configure.ac, LZ4/configure.ac, and LZF/configure.ac.
• Plugin Path Changes:
  • Rename HDF5_PLUGIN_DIR to HDF5_PLUGIN_PATH in BZIP2/configure.ac, JPEG/configure.ac, LZ4/configure.ac, and LZF/configure.ac.
  • Update plugindir to @HDF5_PLUGIN_PATH@ in BZIP2/src/Makefile.am, JPEG/src/Makefile.am, LZ4/src/Makefile.am, and LZF/src/Makefile.am.
• Testing and Examples:
  • Add run_tests.sh to JPEG/example/Makefile.am, LZ4/example/Makefile.am, and LZF/example/Makefile.am.
  • Modify check_PROGRAMS and TESTS in JPEG/example/Makefile.am, LZ4/example/Makefile.am, and LZF/example/Makefile.am to include test scripts.
• Miscellaneous:
  • Update libtool.m4 and ltversion.m4 in BZIP2/m4 to newer versions.
  • Adjust JPEG_QUALITY to 50 in JPEG/example/h5ex_d_jpeg.c and update related test files.

^{This description was created by for da1fab3. You can customize this summary. It will automatically update as commits are pushed.}

[ellipsis-dev]

⚠️ This PR is too big for Ellipsis, but support for larger PRs is coming soon. If you want us to prioritize this feature, let us know at help@ellipsis.dev

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Generated with ❤️ by ellipsis.dev

[ellipsis-dev]

⚠️ This PR is too big for Ellipsis, but support for larger PRs is coming soon. If you want us to prioritize this feature, let us know at help@ellipsis.dev

---

Generated with ❤️ by ellipsis.dev

[brtnfld]

stale comment in LZ4/configure.ac:
The AC_ARG_WITH help string still says "use it as a place for the large (i.e. > 2 GiB) files created during the large file testing", which was copy-pasted from HDF5 and is wrong for a plugin directory. In LZF this comment was correctly removed; it should be removed in LZ4 as well.

Issue — misleading AC_MSG_NOTICE in LZF/configure.ac:
Line AC_MSG_NOTICE([*** This is a configure for LZ4 ***]) is a pre-existing copy-paste bug but it's still in this PR unchanged. Should be fixed to say LZF.

Issue:
BZIP2/example/Makefile.am, LZ4/example/Makefile.am, and LZF/example/Makefile.am all reference run_tests.sh in both TESTS and EXTRA_DIST, but no run_tests.sh this file does not exist for BZIP2, LZ4, or LZF.

Issue: JPEG/src/H5Zjpeg.c removed jpegInfo.err assignment:

•   jpegInfo.err = jpeg_std_error(&jpegErr);
  

•   /* Now we can initialize the JPEG compression object. */
    jpeg_create_compress(&jpegInfo);
  

The line jpegInfo.err = jpeg_std_error(&jpegErr) was removed from the compression path immediately before jpeg_create_compress(), which violates the libjpeg API contract.

ALSO,
debug artifacts left in source:
The #ifdef JPEG_DEBUG / fprintf(stderr, ...) / #endif blocks (which were clean, conditional debug code) were replaced with commented-out printf("**** ...") calls:

•    /* printf("****   decompressing nbytes: %ld\n", nbytes); */
  

•        /* printf("****   jpegInfo.output_scanline: %d\n", jpegInfo.output_scanline);	     */
  

•    /* printf("****    compressing nbytes: %ld cd_nelmts %ld\n", nbytes, cd_nelmts); */
  

These are development leftovers and should be removed entirely before merging. The original #ifdef JPEG_DEBUG pattern was better — it allowed debug output without code churn.

Issue:
LZF/example/h5ex_d_lzf.c:

• printf(" Number of parameters is %d with the value %u\n", nelmts, values_out[0]);

• printf(" Number of parameters is %ld with the value %u\n", nelmts, values_out[0]);
  %ld is still wrong for size_t — it should also be %zu, consistent with the JPEG fix. %ld works on most LP64 systems (Linux/macOS 64-bit) but is undefined behavior and fails on LLP64 (Windows 64-bit).

[brtnfld]

See comment