[MacPorts] #63458: python37 @3.7.12_0 can't build py37-setuptools on 10.4 or 10.5

[MacPorts]

#63458: python37 @3.7.12_0 can't build py37-setuptools on 10.4 or 10.5
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 Reporter:  fhgwright  |      Owner:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:
 Keywords:             |       Port:  python37
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 The summary isn't quite correct in that 10.5 i386 works, but 10.4-10.5
 ppc, 10.4 i386, and 10.5 x86_64 all fail.  10.4 x86_64 is untested.
 10.6-10.15 all work.

 Rolling back py-setuptools to 57.1 doesn't help, so the problem seems to
 be in python37 @3.7.12_0.  The logs aren't terribly helpful, in that the
 only indication of trouble is a nonzero exit status from running setup.py
 in the py37-setuptools build procedure.

 There's no similar issue with other Python versions.

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Ticket URL: <https://trac.macports.org/ticket/63458>
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