Cibuildwheel missing wheels

Python Help
1

I am trying once more to get github to build some C limited ABI extensions. I had a lot of problems caused by various deprecated github actions eg uses: actions/upload-artifact@v4 caused a lot of grief. So I looked for some assistance and found this example GitHub - joerick/python-abi3-package-sample: An example Python package that builds ABI3-compatible wheels. I forked this for playing about GitHub - MrBitBucket/ci-spam: An example Python package that builds ABI3-compatible wheels

After make some small changes to .github/workflows/cibuildwheel.yml it looks like

name: Build

on: [push]

jobs:
  build_wheels:
    name: Build wheels on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, ubuntu-24.04-arm, windows-latest, macos-13, macos-14]

    steps:
      - uses: actions/checkout@v4

      - name: Set up QEMU
        if: runner.os == 'Linux'
        uses: docker/setup-qemu-action@v3
        with:
          platforms: all

      - name: Build wheels
        uses: pypa/cibuildwheel@v2.22.0
        env:
          CIBW_BUILD: cp313-*

      - uses: actions/upload-artifact@v4
        with:
          name: "${{ github.event.repository.name }}-${{ matrix.os }}-${{ strategy.job-index }}"
          path: ./wheelhouse/*.whl

I managed to make this simple build 10 extensions

spam-0.1.0-cp36-abi3-macosx_10_13_x86_64.whl
spam-0.1.0-cp36-abi3-macosx_11_0_arm64.whl
spam-0.1.0-cp36-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl
spam-0.1.0-cp36-abi3-musllinux_1_2_aarch64.whl
spam-0.1.0-cp36-abi3-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl
spam-0.1.0-cp36-abi3-musllinux_1_2_i686.whl
spam-0.1.0-cp36-abi3-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_17_x86_64.manylinux2014_x86_64.whl
spam-0.1.0-cp36-abi3-musllinux_1_2_x86_64.whl
spam-0.1.0-cp36-abi3-win32.whl
spam-0.1.0-cp36-abi3-win_amd64.whl

Reading Options - cibuildwheel I was expecting to get others eg ppc64le s390x armv7l wheels.

I suppose I lack some cibuildwheel environment setting. Anyone know of how to force those builds or a better example?

2

Is it Random segfault for QEMU builds in GitHub Actions · Issue #2257 · pypa/cibuildwheel · GitHub?

3

I tried using the recommended patch ci(fix): use tonistiigi/binfmt:qemu-v8.1.5 image for qemu · pypa/cibuildwheel@4538497 · GitHub but didn’t get any more wheels.

I looked in the logs and did not any obvious segfaults etc etc.

4

The list of wheels you get is what I would expect given the os matrix. I think that you would need to run cibuildwheel under qemu for e.g. ppc64le etc to get those wheels.

I haven’t used setup-qemu-action before but I am assuming that it just installs qemu and then you need to do something else to actually run commands under qemu emulation.

5

I think you are right, but I don’t know of a suitable example to follow.

Looking at the logs I see that the setup-qemu-action reports

Extracting available platforms
  linux/amd64,linux/amd64/v2,linux/amd64/v3,linux/arm64,linux/riscv64,linux/ppc64le,linux/s390x,linux/386,linux/mips64le,linux/mips64,linux/loong64,linux/arm/v7,linux/arm/v6

I think I need this

       CIBW_ARCHS_LINUX: ${{ runner.arch == 'X64' && 'auto ppc64le s390x' || 'auto armv7l' }}

in the cibuild action environment. I thought that would be handled automatically with the CIBW_BUILD wild card cp313*.

6

Yes I see more builds using CIBW_ARCHS_LINUX