ci: build aarch64 manylinux wheels on ubuntu-24.04-arm runners#52
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nlopt ships no aarch64 wheels on PyPI, forcing source builds (or making installs impossible) on ARM hosts like NVIDIA DGX Spark, Jetson Thor and GH200. GitHub now provides free ubuntu-24.04-arm runners for public repos, so add them to the cibuildwheel matrix (manylinux_2_28_aarch64 image) and to the wheel test matrix. The existing test-step file discovery already matches (runner.os=Linux -> 'lin', chunk=ubuntu-24.04-arm).
numpy stopped publishing manylinux2014 wheels, so pip builds it from source inside the cibuildwheel container; manylinux2014's gcc 10.2.1 fails numpy's GCC>=10.3 check. manylinux_2_28 ships a modern toolchain (same image family already used for aarch64).
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@DanielBok could you review, merge and deploy new version release for all arm users? |
DanielBok
approved these changes
Jul 4, 2026
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@DanielBok can we get the token in this failing job updated |
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Motivation
nlopt currently ships no aarch64 wheels on PyPI, making it uninstallable (or forcing slow/failing source builds) on ARM Linux hosts — NVIDIA DGX Spark, Jetson Thor, GH200, AWS Graviton, etc. This blocks downstream packages that depend on nlopt (e.g. dex-retargeting, used by NVIDIA Isaac Teleop / LeRobot) on ARM.
GitHub now provides free
ubuntu-24.04-armrunners for public repos, so wheels can be built natively — no QEMU, no cross-compilation.Changes
build_wheels_unix: addubuntu-24.04-armto the matrix +CIBW_MANYLINUX_AARCH64_IMAGE: quay.io/pypa/manylinux_2_28_aarch64.test-wheels: addubuntu-24.04-armto the matrix (the existing wheel-discovery logic already handles it:runner.os=Linux→lin, chunk = matrix os).manylinux_2_28: numpy no longer publishes manylinux2014 wheels, soCIBW_BEFORE_BUILD: pip install numpybuilds numpy from source inside the container and fails manylinux2014's gcc 10.2.1 (NumPy requires GCC >= 10.3). This currently breaks the ubuntu-latest job on master too; manylinux_2_28 ships a modern toolchain and matches the aarch64 image family.Evidence
Full CI run on my fork — all build + all 25 test jobs green (cp310–cp314 × 5 platforms): https://github.com/johnnynunez/nlopt-python/actions/runs/28717151621
Produced artifacts include
nlopt-2.10.0-cp3{10..14}-manylinux_2_24_aarch64.manylinux_2_28_aarch64.whl.Additionally verified on real ARM hardware (NVIDIA DGX Spark, aarch64, Python 3.12): the cp312 wheel installs with numpy 2.5.1 and solves the NLopt tutorial problem (LD_MMA, two inequality constraints) to the exact optimum (1/3, 8/27).
Note: the
Deploy packagesjob failed only on my fork for the expected reason (no PyPI credentials there); it is release-gated and unaffected by this change.