Linux wheels for ARM64, ppc64le and s390x?

[peterjc]

TravisCI now supports additional CPU types (although I'm finding ARM64 and ppc64le are slower and thus more likely to timeout), although they are labelled as alpha:

ARM64 - https://docs-staging.travis-ci.com/user/multi-cpu-architectures

ppc64le and s390x - https://blog.travis-ci.com/2019-11-12-multi-cpu-architecture-ibm-power-ibm-z

Is it therefore possible at least in theory to use this to build Python wheels for theses architectures?

[matthew-brett]

I believe it's possible to build them in multibuild now : https://github.com/matthew-brett/multibuild/pull/281

They would each need something in auditwheel or something like the delocate utility for Mac, to move the built libraries into the wheel. I don't know if that's available yet ...

[peterjc]

So work in progress - thanks. I don't know enough about auditwheel or delocate to help there.

[effigies]

auditwheel is being tested on arm64, ppc64le and s390x (see https://github.com/pypa/auditwheel/blob/master/.travis.yml), so this seems like it's basically ready. But I also know little, here...

[mattip]

There is a WIP in MacPython/numpy-wheels#70. It seems it will require some work, particularily gh-257 which breaks running install_run on other platforms. It also seems there is something off with the ppc64le travis offering so all build stages must be a single script rather than multiline scripts

[mattip]

Latest devel branch should now work. Closing, please reopen if more help is needed.