[luhenry]

• Package: jxlpy
• Version: 0.9.5
• Source: https://github.com/olokelo/jxlpy
• Docs: http://github.com/olokelo/jxlpy

Compiles a Cython/C++ extension binding libjxl's encode/decode API. Upstream publishes no riscv64 wheel.

Mirrors upstream's packaging.yml: builds libjxl v0.10.1 from source via CMake in CIBW_BEFORE_ALL, same as upstream's own wheel job.

Differs from upstream

• Relies on cibuildwheel's default repair step instead of a manual auditwheel repair invocation - cibuildwheel already runs one.

Testing

• No upstream test suite (only examples/*.py); runs the same encode/decode round trip as examples/encode_simple.py + examples/decode_simple.py.

License: Wheel bundles libjxl (BSD-3-Clause, built from source) plus its vendored highway (Apache-2.0), brotli (MIT) and skcms (BSD-3-Clause); upstream's own build ships no licence text for them, so this build adds it.

Not built locally (low disk); CI's pull_request run does the real riscv64 build.

[luhenry]

Diagnosed the two genuine failures (cp312, cp314 — the cp310/cp311/cp313 legs showing cancelled are unrelated runner-pool starvation, no action needed there).

Root cause: both failing legs die at the identical point in CIBW_BEFORE_ALL_LINUX's libjxl build — not in jxlpy's own extension, and not interpreter-specific:

/usr/bin/ld: lib/libjxl_cms.so.0.10.1: undefined reference to
  `skcms_private::baseline::run_program(...)'
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/encode_oneshot.dir/build.make:104: encode_oneshot] Error 1

This happens while linking libjxl's own examples/encode_oneshot, a toolchain/ABI issue building vendored skcms on riscv64 that's internal to libjxl v0.10.1, unrelated to jxlpy. Since the CIBW_BEFORE_ALL_LINUX cmake invocation is identical across the whole matrix, this would have hit cp310/cp311/cp313 too had they not been cancelled first — it's a single shared root cause, not two distinct ones.

Fix: the three libjxl example executables (decode_oneshot, decode_progressive, encode_oneshot) are never used — setup.py's extra_link_args only needs -ljxl -ljxl_threads, built and installed well before the examples step. They're gated by JPEGXL_ENABLE_EXAMPLES (default ON, and not among the already-disabled BENCHMARK/TOOLS/DEVTOOLS flags). Added -DJPEGXL_ENABLE_EXAMPLES=OFF alongside those, which skips the broken example link entirely without touching libjxl/skcms source or the LIBJXL_TAG pin.

Pushed as bced3b17e (rebased to 65a87f5d1 after a queue:/merge commit landed on the branch in the meantime). Re-running CI now.