17 regression] gcc defines __STDC_VERSION_LIMITS_H__ after including glibc's header which defines it

sjames at gcc dot gnu.org via Gcc-bugs Sat, 02 May 2026 22:26:05 -0700

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125161


--- Comment #7 from Sam James <sjames at gcc dot gnu.org> ---
(In reply to Drea Pinski from comment #2)
> Are you sure this was not a glibc issue?

Looks like glibc has guarded its side from the start:

commit e535fb910cd6fa5fea157e74a30caf5759372928
Author:     Joseph Myers <[email protected]>
AuthorDate: Thu Nov 27 19:32:49 2025 +0000
Commit:     Joseph Myers <[email protected]>
CommitDate: Thu Nov 27 19:32:49 2025 +0000

    Define C23 header version macros

[Bug c/125161] [15/16/17 regression] gcc defines __STDC_VERSION_LIMITS_H__ after including glibc's header which defines it

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