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BLD: use OpenBLAS in the windows-arm64 build #29035

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mattip opened this issue May 22, 2025 · 4 comments · Fixed by #29039
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BLD: use OpenBLAS in the windows-arm64 build #29035

mattip opened this issue May 22, 2025 · 4 comments · Fixed by #29039
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component: build
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2.3.0 release

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@mattip
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mattip commented May 22, 2025

There is now a scipy-openblas32 wheel for win-arm64 on PyPI. How can we use it in the cross-compilation build in the win-arm64 build? In the spin-based builds we have a command line option, do we need to reproduce the work done there (installing pkgconfig, using it to get the include CFLAG and lib link flag in the cross command file) or can we start using spin directly?

cc @SlobodanMiletic
@rgommers
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@mattip that's the wrong action, that one is obsolete now that we have windows-arm64 runners. See gh-28836 for the whel build job that needs changing.

@rgommers rgommers added this to the 2.3.0 release milestone May 23, 2025
@mattip
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mattip commented May 23, 2025

Ahh, so it is sufficient to remove these lines?

numpy/tools/wheels/cibw_before_build.sh

Lines 25 to 27 in bbdebae

elif [[ $(python -c"import sysconfig; print(sysconfig.get_platform())") == "win-arm64" ]]; then
echo "No BLAS used for ARM64 wheels"
export INSTALL_OPENBLAS=false

@mattip
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mattip commented May 23, 2025

... and bump the ci_requirements to scipy-openblas32==0.3.29.265.0, scipy-openblas64==0.3.29.265.0

@mattip mattip mentioned this issue May 23, 2025
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@rgommers
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I think so, yes.

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BLD: bump OpenBLAS version, use OpenBLAS for win-arm64 mattip/numpy
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