Currently, dev-lang/python-3.11.3 is unbuildable on macOS due to GCC
incompatibility. There exists two "#ifdef" checks for the system calls
mkfifoat() and mknodat(), which are not compatible with GCC. Because
they're defined using the __builtin_available() function - specific to
clang without a fallback for GCC, they're never defined, thus creating
the following errors:

    ./Modules/posixmodule.c:15647:23: error: 'HAVE_MKFIFOAT_RUNTIME'
    undeclared (first use in this function); did you mean
    'HAVE_MKDIRAT_RUNTIME'?
    ./Modules/posixmodule.c:15651:22: error: 'HAVE_MKNODAT_RUNTIME'
    undeclared (first use in this function); did you mean
    'HAVE_MKDIRAT_RUNTIME'?

This bug [1] has already been reported to upstream with a patch [2]
waiting to be merged. This commit applies the upstream patch to add
the missing GCC fallbacks.

[1] python/cpython#104106
[2] python/cpython#104129

Closes: https://bugs.gentoo.org/905618
Signed-off-by: Yifeng Li <tomli@tomli.me>

pythongh-104129).

(cherry picked from commit e5b8b19)

Co-authored-by: Dong-hee Na <donghee.na@python.org>

…ongh-104129)

…104129) (gh-104187)

gh-104106: Add gcc fallback of mkfifoat/mknodat for macOS (gh-104129)

* main: (61 commits)
  pythongh-64595: Argument Clinic: Touch source file if any output file changed (python#104152)
  pythongh-64631: Test exception messages in cloned Argument Clinic funcs (python#104167)
  pythongh-68395: Avoid naming conflicts by mangling variable names in Argument Clinic (python#104065)
  pythongh-64658: Expand Argument Clinic return converter docs (python#104175)
  pythonGH-103092: port `_asyncio` freelist to module state (python#104196)
  pythongh-104051: fix crash in test_xxtestfuzz with -We (python#104052)
  pythongh-104190: fix ubsan crash (python#104191)
  pythongh-104106: Add gcc fallback of mkfifoat/mknodat for macOS (pythongh-104129)
  pythonGH-104142: Fix _Py_RefcntAdd to respect immortality (pythonGH-104143)
  pythongh-104112: link from cached_property docs to method-caching FAQ (python#104113)
  pythongh-68968: Correcting message display issue with assertEqual (python#103937)
  pythonGH-103899: Provide a hint when accidentally calling a module (pythonGH-103900)
  pythongh-103963: fix 'make regen-opcode' in out-of-tree builds (python#104177)
  pythongh-102500: Add PEP 688 and 698 to the 3.12 release highlights (python#104174)
  pythonGH-81079: Add case_sensitive argument to `pathlib.Path.glob()` (pythonGH-102710)
  pythongh-91896: Deprecate collections.abc.ByteString (python#102096)
  pythongh-99593: Add tests for Unicode C API (part 2) (python#99868)
  pythongh-102500: Document PEP 688 (python#102571)
  pythongh-102500: Implement PEP 688 (python#102521)
  pythongh-96534: socketmodule: support FreeBSD divert(4) socket (python#96536)
  ...