[New-bugs-announce] [issue46513] AC_C_CHAR_UNSIGNED from configure.ac confuses GCC 12+ by defining __CHAR_UNSIGNED__

[Miro Hrončok]

New submission from Miro Hrončok <miro at hroncok.cz>:

As described at https://mail.python.org/archives/list/python-dev@python.org/thread/MPHZ3TGSHMSF7C4P7JEP2ZCYLRA3ERC5/ the AC_C_CHAR_UNSIGNED macro from configure.ac confuses GCC 12+ as it exports a reserved symbol __CHAR_UNSIGNED__ through pyconfig.h.

My assumption was that AC_C_CHAR_UNSIGNED can be dropped entirely and the PR in https://github.com/python/cpython/pull/30851 confirmed that all the buildbots are happy with such change. Hence, I open this issue to actually do it.

Thanks

----------
components: Build
messages: 411575
nosy: christian.heimes, hroncok, petr.viktorin, vstinner
priority: normal
severity: normal
status: open
title: AC_C_CHAR_UNSIGNED from configure.ac confuses GCC 12+ by defining __CHAR_UNSIGNED__
type: compile error
versions: Python 3.10, Python 3.11, Python 3.9

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