MAINT: Try making 3.10 wheels on Windows and OSX

[charris]

No description provided.

[charris]

close/reopen

[charris]

Two things are new with the 3.10 release

• Microsoft will be dropping 32 bit Python 3.10 and it is not available on azure-pipelines
• The Mac version is only available as a universal2 wheel. That is due to multibuild requiring osx 11+ for the build.

[mattip]

I wonder if cibuildwheel + github actions will be any different.

[mattip]

For 32-bit windows wheels, if all else fails we might be able to use a 32-bit docker container image, and then run it via a container

[mattip]

It seems cibuildwheel has 32-bit windows, see the table of supported versions

[charris]

@mattip, the omission of 32 bit Python 3.10 on windows was a deliberate choice of the azure folks. We could probably talk them into it, but if Microsoft is headed that way, we might want to go along. The bigger problem is that travis-ci has become completely unreliable for arm64, mostly timeouts on fetches and downloads. I don't know the cause, but it is a PITA.

[matthew-brett]

If so, the Azure folks should talk to their own CPython expert - who seems to think that 32-bit will be around for a while : scipy/scipy#14316 (comment)

[charris]

@matthew-brett See actions/runner-images#4226 (comment). I do have a question about multibuild, it won't build Python 3.10 wheels for x86_64, only for arm64 and universal2 wheels. I'm not sure if those wheels work correctly. I think this is due to line 168 in osx_utils.sh. Maybe the mac version number needs an update to macosx_11_0?

[rgommers]

universal2 wheels for Python 3.10 still need to work with macOS 10.x. Although it'd be fine to bump 10_9 to 10_13 by now I'd say (I've seen that in some other projects, but there's no need to do so AFAIK).

[matthew-brett]

@charris - sorry for my confusion - but here's my understanding:

• Python.org installers, used by Multibuild, are universal2 only since Python 3.10
• These can build x86_64, arm64 and Universal wheels.

So, I was expecting x86_64 builds to work for Python 3.10; does they fail? Is there any error to look at somewhere? Happy to fix ASAP if they don't work.

[charris]

I was expecting x86_64 builds to work for Python 3.10

Well, I don't know if they do or not. The universal2 file is big enough, but I'd like to see it checked before a release. Multibuild does produce separate arm64 (macosx_11_0) wheels, but no x86_64 wheels. I'm not really clear on why not, nor what it means that 3.10 only supports universal2 wheels.