python39 @3.9.1 _ctypes import fails on 10.4 and 10.5

[fhgwright (Fred Wright)]

The summary says it all:

MacX:~ fw$ python3.9
Python 3.9.1 (default, Jan 10 2021, 00:21:42) 
[GCC 4.2.1 (Apple Inc. build 5577)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import _ctypes
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named '_ctypes'
>>> ^D

This worked @3.9.0, so the workaround is to roll back if possible:

MacX:~ fw$ python3.9
Python 3.9.0 (default, Nov  1 2020, 20:09:43) 
[GCC 4.2.1 (Apple Inc. build 5577)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import _ctypes
>>> ^D

Observed on 10.4 i386, 10.5 ppc, 10.5 i386, and 10.5 x86_64. Not yet tested on 10.4 ppc.

[kencu (Ken)]

has duplicate #62115

[fhgwright (Fred Wright)]

BTW, this issue is currently moot for 10.4 ppc, since the patch phase fails in that case.

[kencu (Ken)]

ah, thanks. I haven't updated my 10.4 systems in a while so I'll fix that next time I'm by there.

[kencu (Ken)]

simple fix here

​https://trac.macports.org/ticket/62506

[jmroot (Joshua Root)]

In 750711ce73239cc24afdd60440310badbf37159b/macports-ports (master):

python39: bug fixes

Apply upstream fix for compilation of ctypes with older gcc. Relax
MACOSX_DEPLOYMENT_TARGET check in distutils.

Fixes: #62020
Fixes: #62450