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Open Babel's own CMake/C++ source has no x86-specific code (checked src/, src/formats/libinchi/ and the build scripts); upstream's pyproject.toml already builds linux_aarch64 wheels with the same cibuildwheel recipe, and swig/cmeel-eigen (the two build-time deps) both ship riscv64-portable wheels on PyPI already. Only the Linux before-all is overridden, installing cairo-devel from the (modern) Rocky 10 image instead of building cairo 1.15.14 from source the way upstream does to work around manylinux2014's broken CentOS cairo-devel.
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openbabel-wheel3.1.1.23Compiles Open Babel (CMake/SWIG, scikit-build-core) via a third-party wheel-packaging wrapper around the upstream cheminformatics toolkit. Upstream publishes no riscv64 wheel.
Mirrors upstream's own
[tool.cibuildwheel], which is used as-is (build matrix, cmake defines, test-command); only the Linux native deps are overridden.Differs from upstream
dnf install cairo-develinstead of building cairo 1.15.14 from source - manylinux2014's CentOS cairo-devel is broken for this; Rocky 10 (this image) ships a current oneTesting: same as upstream.
License: GPL-2.0 (Open Babel's own licence); no other library is vendored into the wheel.
CI pending.