ci: build aarch64 and armv7l wheels on native ARM runners#774
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GitHub now provides public hosted Linux ARM64 runners (`ubuntu-24.04-arm`), so the aarch64 wheel build no longer needs to run under QEMU emulation on x86_64. The armv7l build also moves to the same aarch64 host; QEMU stays registered so binfmt picks up the 32-bit ARM userspace handler whether or not the host kernel has CONFIG_COMPAT enabled, and even with emulation aarch64-on-aarch64 is far cheaper than the previous aarch64-on-x86_64 path. The ppc64le, s390x, and riscv64 builds keep their ubuntu-latest + QEMU setup since there are no native GH-hosted runners for those. Each (qemu, tag) include combination is listed explicitly rather than letting partial-key include merging fan out across both tag values implicitly, and the qemu input is passed as a real boolean expression (`! matrix.native-arch`) instead of string literals.
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What do these changes do?
Move the aarch64 and armv7l legs of the odd-arch wheel matrix off the
x86_64 QEMU path and onto GitHub's public
ubuntu-24.04-armhostedrunner. aarch64 now builds natively with no emulation. armv7l still
gets
docker/setup-qemu-actionso binfmt registers a 32-bit ARMhandler whether or not the host kernel ships
CONFIG_COMPAT; evenunder emulation, running on an aarch64 host is far cheaper than the
previous aarch64-on-x86_64 layout.
ppc64le, s390x, and riscv64 keep the
ubuntu-latest+ QEMU setupsince there are no native GH-hosted runners for those.
The matrix gains an
include:block that overridesrunner-vm-osand a
native-archflag per arch; the job-levelqemuandrunner-vm-osexpressions fall back to the previous behaviour forthe unmodified arches.
This is a port of aio-libs/yarl#1724 to
frozenlist; thereusable-cibuildwheel.ymlalready exposes arunner-vm-osinputso no change to the reusable workflow is needed.
Are there changes in behavior for the user?
No. Wheels are still built for the same architectures and tags; only
the host that builds them changes. CI time on the aarch64 leg should
drop significantly.
Related issue number
No tracking issue; mirrors aio-libs/yarl#1724.
Checklist
CONTRIBUTORS.txt— already listedCHANGES/folderAgent run details (optional, for reviewers)
Drafted with Claude Code (claude-opus-4-7); reviewed by @bdraco.
Local validation:
pre-commit run --files .github/workflows/ci-cd.yml CHANGES/774.contrib.rst docs/spelling_wordlist.txt— passed (yamllint, actionlint, GH workflow validation, codespell).python -c "yaml.safe_load(open('.github/workflows/ci-cd.yml'))"confirms the matrixinclude:shape and the${{ ! matrix.native-arch }}/${{ matrix.runner-vm-os || 'ubuntu-latest' }}expressions parse cleanly.make doc-spellingreports only the pre-existingunobviousmisspelling inCHANGES/README.rston master; the new fragment introducesaarchonly, which is added todocs/spelling_wordlist.txt.Not validated locally: actual native-ARM cibuildwheel run. The runner label and matrix wiring look correct, but the real proof is the first CI run on this branch.