ci: macos-11 image uses 10.9 wheels

[ahartikainen]

Describe the bug

For some reason macos11 images in ci pipeline use 10.9 wheels with pip.

Describe your system

Github Actions

Steps/Code to Reproduce

[ahartikainen]

For some reason on macos-11image

python -c "from distutils import util;print(util.get_platform())"
# macosx-10.15-x86_64

And just to be sure

python -c "from setuptools._distutils import util;print(util.get_platform())"
# macosx-10.15-x86_64

[riddell-stan]

Is macos 11 refusing to install wheels built using older versions of macos? I thought macos wheels built on older systems would work on newer os versions.

[ahartikainen]

I think on macos-11 image in github actions the python is refusing to install newer (gh actions10.x vs pypi 11) wheels.

httpstan macos-11 ci also creates 10.x wheel for local use, but httpstan-wheels repo creates the correct 11 wheel.

[ahartikainen]

Ok, I wonder if GH actions use the same python binary for macos10 and macos11?

[ahartikainen]

I guess this is somehow related

actions/python-versions#114

[riddell-stan]

Let's fix this problem first. We could also build a Python 3.11 wheel in httpstan-wheels while we are at it.

[riddell-stan]

It's just macos-11, 3.10. macos-11, 3.9 seems to work fine.

[ahartikainen]

Yes, we need to address this first.

So 3.9 and 3.8 has macos 10.16 wheels.
3.10 has macos 11.0.

https://pypi.org/project/httpstan/#files

And the python on GH Actions thinks it is macos 10.15.

So any 10.x works but 11.x does not?

[riddell-stan]

So why can't macos 11.0 (Python 3.10) install the PyPI wheel httpstan-4.8.2-cp310-cp310-macosx_11_0_x86_64.whl? Looks compatible to me!

[riddell-stan]

Perhaps we should try to build a Python 3.10 wheel on an older macos version in httpstan-wheels?

[ahartikainen]

That might be a solution.

I bet pip tool somehow fails with 10.x vs 11.x (major.minor) difference given major number difference.

[riddell-stan]

I think I've figured it out. Setting ARCHFLAGS to x86_64 did the trick. Now I'm able to build httpstan-4.8.2-cp310-cp310-macosx_10_15_x86_64.whl. See stan-dev/httpstan-wheels#92

[riddell-stan]

Fixed in httpstan-wheels.