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Add s390x wheel build scripts and experimental CI workflow.#15073

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Aakash2512git wants to merge 1 commit into
pyca:mainfrom
Aakash2512git:add-s390x-wheel-scripts
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Add s390x wheel build scripts and experimental CI workflow.#15073
Aakash2512git wants to merge 1 commit into
pyca:mainfrom
Aakash2512git:add-s390x-wheel-scripts

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@Aakash2512git

@Aakash2512git Aakash2512git commented Jun 20, 2026

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Provide a minimal UBI9-based builder, QEMU helpers, and workflow_dispatch CI so cryptography wheels can be built and smoketested on s390x without native IBM Z hardware.
Validated on Mac arm64 via QEMU
Wheel: cryptography-50.0.0.dev1-cp312-abi3-manylinux_2_34_s390x.whl
Smoketest passed (OpenSSL 3.4.6)

Provide a minimal UBI9-based builder, QEMU helpers, and workflow_dispatch
CI so cryptography wheels can be built and smoketested on s390x without
native IBM Z hardware.
@alex

alex commented Jun 20, 2026

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Before we'll consider adding any additional wheel platform, our minimum requirements are:

  • We must run tests for this
  • This must be integrated into our existing testing and wheel building infra -- without adding maintenance burden
  • It must meet our bars for performance and reliability

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