python@3.9: update upstream patch

[fxcoudert]

Turns out there is another bug with MACOSX_DEPLOYMENT_TARGET being an integer in Python. Updating to the latest version of the upstream patch. This is bad, because it will hit all formulas based on Python, on Big Sur 11.0.1 (but not the 11.1 beta).

[fxcoudert]

Testing now that Homebrew/brew#9373 is merged

[BracketMaster]

While this patch works for building Python itself, pip packages depending on
distutils will complain as follows:

I strongly suspect Python was simply unprepared from going from 10 to 11...

brew install python@3.9
pip3 install markupsafe
# trimmed
    File "/usr/local/lib/python3.9/site-packages/wheel/macosx_libfile.py", line 356, in calculate_macosx_platform_tag
      assert len(base_version) == 2
  AssertionError

[BracketMaster]

Currently looking at what is going on in: /usr/local/lib/python3.9/site-packages/wheel/macosx_libfile.py

[BracketMaster]

NVM, that is a wheel issue.

[BracketMaster]

Actually - it is a distutils problem as wheel imports distutils, and I believe I found the culprit:

/usr/local/Cellar/python@3.9/3.9.0_3/Frameworks/Python.framework/Versions/3.9/lib/python3.9/_sysconfigdata__darwin_darwin.py

That file is automatically generated at build time and changing the buildconfig such that MACOSX_DEPLOYMENT_TARGET=10.0.1 seems to fix things.

[BracketMaster]

@fxcoudert
I figured it out!
The fix is actually very simple and you can remove your past two patches, and it still works.
simple change this line
to ``args << "MACOSX_DEPLOYMENT_TARGET=11.0.1"```

So that this works across different versions of MacOS, the complete solution would be:

if MacOS.version >= :big_sur
   args << "MACOSX_DEPLOYMENT_TARGET=11.0.1"
else
   args << "MACOSX_DEPLOYMENT_TARGET=#{MacOS.version}"
end

And that's it! Everything including pip just works that way.

For some reason, MacOs.verion simply evaluates to 11 in ruby for BigSur.
The fact that the base number is missing really confuses python and breaks
distutils with all sorts of badness.

[fxcoudert]

Reminder to myself: when I merge this, I need to open yet another python update PR, this time to update wheel which was released in the meantime. 😢

[BrewTestBot]

@fxcoudert has triggered a merge.