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Build ale-py (Arcade Learning Environment) riscv64 wheels for cp312/cp313/cp314 from the upstream v0.12.1 checkout, mirroring the build-wheels/test-wheels jobs of upstream's build-python.yml. Upstream builds in a manylinux vcpkg image with no riscv64 variant, so CIBW_BEFORE_ALL builds the same vcpkg.json dependencies from their release tarballs: SDL2 2.30.11 (shared, shipped next to the extension for SDL_DYNLOAD) and OpenCV 4.10.0 core/imgproc (static), with zlib from the image. The XLA vector interface is turned off: it needs jaxlib's FFI headers and jaxlib has no riscv64 build. jax is therefore dropped from the build by preinstalling scikit-build-core and nanobind (capped at the 2.x series 0.12.1 was released with) and building with pip --no-build-isolation. Tests run upstream's pytest suite with the `test` extra minus jax/chex; the XLA test module importorskips them. A patch widens project.license-files to LICENSE* so the SDL2, OpenCV and nanobind notices staged at the project root ship in the wheel.
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All three build legs failed identically at CMake configure: CMake Error ... OpenCVModules.cmake:131 The imported target "libtiff" references the file "/usr/local/lib/opencv4/3rdparty/liblibtiff.a" but this file does not exist. BUILD_LIST=core,imgproc excludes imgcodecs (the module that would actually use libtiff/libjpeg/libpng/etc for image I/O), but OpenCV's default WITH_TIFF=ON (and the other WITH_* format flags) still makes it register those 3rdparty static-lib targets in the exported OpenCVConfig/OpenCVModules cmake files -- it just never builds them, since nothing in the core/imgproc-only build consumes them. ale-py's own CMakeLists.txt find_package(OpenCV)'s just importing that config is enough to hit the dangling target. Turn the format libs off explicitly, matching what's actually needed for core/imgproc. Signed-off-by: Ludovic Henry <git@ludovic.dev>
libtiff is fixed, but the rebuild hit the identical dangling-target pattern on a different library: CMake Error ... OpenCVModules.cmake:96 The imported target "libprotobuf" references the file "/usr/local/lib/opencv4/3rdparty/liblibprotobuf.a" but this file does not exist. WITH_* defaults to ON and gets registered as a 3rdparty cmake target regardless of BUILD_LIST -- only consumption by an actually-built module decides whether it gets built, so any left-on default that a core/imgproc-only build never touches leaves the same kind of dangling reference behind. Turn off the rest of the ones that only matter to modules this port doesn't build (dnn/objdetect/highgui/gapi/etc), not just the image-format ones already off, so this doesn't keep coming back one library at a time. Signed-off-by: Ludovic Henry <git@ludovic.dev>
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ale-py0.12.1Compiles the ALE Atari emulator core and its nanobind extension. Upstream publishes no riscv64 wheel.
Mirrors upstream's
build-python.yml.Differs from upstream
jaxbuild requirement is not resolved.Matrix: cp312/cp313/cp314 - upstream skips cp314t.
Testing
testextra without jax/chex (jaxlib); the XLA test module skips itself.License: Wheel bundles SDL2 (Zlib), OpenCV (Apache-2.0) and nanobind (BSD-3-Clause); upstream ships no licence text for them, so the build adds it.
Patches
0001-pyproject-widen-license-files-to-cover-bundled-libraries.patch- To upstream. Without it the bundled libraries' licences are dropped. Not riscv64-specific.Generated by Claude Code