https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109516
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- https://www.open-std.org/jtc1/sc22/WG14/www/docs/dr_120.html is the defect report which makes this implementation defined really.
pinskia at gcc dot gnu.org via Gcc-bugs Fri, 14 Apr 2023 12:40:19 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109516
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- https://www.open-std.org/jtc1/sc22/WG14/www/docs/dr_120.html is the defect report which makes this implementation defined really.