Make clib build reproducible by sorting sources

[danigm]

Summary of changes

Sort sources in build_clib command.

Closes #3678

Pull Request Checklist

• Changes have tests
• News fragment added in [changelog.d/].

[abravalheri]

Hi @danigm thank you very much for the contribution.

Please note that any changes in the setuptools/_distutils directory need to be proposed in the https://github.com/pypa/distutils repository.

Would you like to propose this change to pypa/distutils?

[danigm]

Hi @danigm thank you very much for the contribution.

Please note that any changes in the setuptools/_distutils directory need to be proposed in the https://github.com/pypa/distutils repository.

Would you like to propose this change to pypa/distutils?

Thanks for the info. I've removed that change from the PR, that's not "needed" because the build_libraries method overrides the base class functionality, so it should work as expected just with this change.

[abravalheri]

I think this looks great.

If no one beats me, I can merge the PR next time I am releasing a version.