New submission from Ghyslain Leclerc <ghlecl...@gmail.com>:

I have tried to compile python on macOS and I have failed.

I have cloned the cpython repository, then used ./configure and make.  There 
are build errors on my system.  They seem related to 
https://bugs.python.org/issue42692.

I have tried the __has_builtin(__builtin_available) code in a single main.c 
file and it compiles and has the appropriate behavior.  I have then tried to 
add #warnings in the file posixmodule.c.  It seems that when compiling this 
file, the preprocessor define does not work.

I run macOS version 11.6.4 (20G417).  I have Xcode Version 13.0 (13A233).  The 
compiler version is:
  Apple clang version 13.0.0 (clang-1300.0.29.3)
  Target: x86_64-apple-darwin20.6.0

Thank you.

----------
components: macOS
messages: 415312
nosy: Ghyslain Leclerc, ned.deily, ronaldoussoren
priority: normal
severity: normal
status: open
title: Build failure on macOS Big Sur
type: compile error
versions: Python 3.10

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue47033>
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