https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93151
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
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See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=93469
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is related to PR 93469: darwin headers ignore the value of __STDC_VERSION
or __cplusplus if _XOPEN_VERSION is used to select an old POSIX standard. But
in this case the problem appears to be in the C++ standard.
These error numbers are required by C++11, which refers to ISO/IEC 9945:2003,
which (I believe) is aligned with POSIX:2001 aka SUSv3. But POSIX:2001 doesn't
define all the error numbers required by C++11.
So if you ask the system to conform to SUSv3 (by defining _XOPEN_VERSION=600)
some error numbers that C++11 requires are absent.
I think we need to fix the C++ standard, but also change libstdc++ to use
#ifdef for the error numbers that aren't required by SUSv3.
