[BUG] PyPI missing cp312 wheel for manylinux aarch64

[norrisjeremy]

Bug Description

Summary: PyPI is missing the cp312 wheel for manylinux aarch64.

Expected Behavior:
For PyPI to have a cp312 wheel for manylinux aarch64 (like is present for cp311 & cp313).

Actual Behavior:
PyPI doesn't have a cp312 wheel for manylinux aarch64 (unlike cp311 & cp313).

Reproduction Steps

Execute:

pip download autobahn==25.12.2 -d /wheels --platform manylinux_2_34_aarch64 --platform manylinux_2_28_aarch64 --platform manylinux_2_17_aarch64 --platform manylinux2014_aarch64 --only-binary :all:

Minimal Reproducible Example:
Execute:

pip download autobahn==25.12.2 -d /wheels --platform manylinux_2_34_aarch64 --platform manylinux_2_28_aarch64 --platform manylinux_2_17_aarch64 --platform manylinux2014_aarch64 --only-binary :all:

Environment

• Package: autobahn-python
• Version: 25.12.2
• Python Version: CPython 3.12
• Operating System: Ubuntu 24.04 on aarch64 (arm64)
• Framework: n/a

Additional Context

Error Messages:

ERROR: Could not find a version that satisfies the requirement autobahn==25.12.2 (from versions: 0.14.0, 0.14.1, 0.15.0, 0.16.0, 0.16.1, 0.17.0, 0.17.1, 0.17.2, 0.18.0, 0.18.1, 0.18.2, 17.5.1, 17.6.1, 17.6.2, 17.7.1, 17.8.1, 17.9.1, 17.9.2, 17.9.3, 17.10.1, 18.3.1, 18.4.1, 18.5.1, 18.5.2, 18.6.1, 18.7.1, 18.8.1, 18.8.2, 18.9.1, 18.9.2, 18.10.1, 18.11.1, 18.11.2, 18.12.1, 19.1.1, 19.2.1, 19.3.1, 19.3.2, 19.3.3, 19.5.1, 19.6.1, 19.6.2, 19.7.1, 19.7.2, 19.8.1, 19.9.1, 19.9.2, 19.9.3, 19.10.1, 19.11.1, 19.11.2, 20.1.2, 20.1.3, 20.2.1, 20.2.2, 20.3.1, 20.4.1, 20.4.2, 20.4.3, 20.6.1, 20.6.2, 20.7.1, 20.12.1, 20.12.2, 20.12.3, 21.1.1, 21.2.1, 21.2.2, 21.3.1, 24.4.2)
ERROR: No matching distribution found for autobahn==25.12.2

Relevant Logs:

n/a

Screenshots:

Related Issues:
Perhaps this is related to 3d856f5?

Checklist

• I have searched existing issues to avoid duplicates
• I have provided a minimal reproducible example
• I have included version information
• I have included error messages/logs

[norrisjeremy]

Also noticed that it is missing for cp314 too:

[oberstet]

Hi @norrisjeremy, thanks for the detailed bug report -- you are correct, there are missing wheels.

Root Cause

The missing wheels are caused by gaps in the CI/CD build matrix for the wheels-arm64 workflow (.github/workflows/wheels-arm64.yml), which builds ARM64 Linux wheels via QEMU emulation inside Docker containers.

The ARM64 workflow matrix currently only defines builds for CPython 3.11 and CPython 3.13:

# wheels-arm64.yml matrix (current)
- name: "cpython-3.11-manylinux_2_28_aarch64"
  python_versions: "cpy311"

- name: "cpython-3.13-manylinux_2_28_aarch64"
  python_versions: "cpy313"

CPython 3.12 and 3.14 are missing from this matrix, which is why there are no cp312 or cp314 aarch64 wheels on PyPI.

For comparison, the x86_64 Docker workflow (wheels-docker.yml) runs just build-all inside a manylinux_2_28_x86_64 container, which builds for all environments defined in the justfile (ENVS := 'cpy314 cpy313 cpy312 cpy311 pypy311'), so all x86_64 wheels are present. Similarly, the native runner workflow (wheels.yml) builds for macOS ARM64 and Windows, both using just build-all, so those are complete too.

Current Coverage on PyPI (v25.12.2)

Python	linux x86_64	linux aarch64	macOS arm64	Windows x64
cp311	✅	✅	❌	✅
cp312	✅	❌ MISSING	❌	✅
cp313	✅	✅	✅	✅
cp314	✅	❌ MISSING	✅	✅
pp311	✅	✅	✅	✅

Note: cp311/cp312 macOS arm64 wheels are also absent -- the macos-15 runner only has the system Python (3.13) and 3.14 beta available via uv, so only those get built there. This is a separate (less critical) gap.

Fix

The fix is to add cpy312 and cpy314 entries to the wheels-arm64.yml matrix. This will be addressed in a follow-up PR.

Workaround

In the meantime, pip install autobahn==25.12.2 on aarch64 with CPython 3.12 or 3.14 will fall back to installing from the source distribution (autobahn-25.12.2.tar.gz), which is available on PyPI. This works correctly and gives you a fully functional installation -- the only difference is the absence of the optional NVX native acceleration extension (which provides a modest performance boost for WebSocket UTF-8 validation).

[norrisjeremy]

Hi @oberstet,

Thanks for the detailed response!
We noticed the issue when we attempted to update to latest Aubobahn release because of the way our CI/CD pipelines are constructed, we only install from wheels and not source base distributions.
We hope that you can remedy this in future Autobahn releases, so that both x86_64 & aarch64 based Linux wheels are available for all supported Python releases.

Thanks!
Jeremy