[Bug libstdc++/105281] status of constexpr and for c++23

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105281

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Those changes in <cmath> have been present since GCC 4.6, so they predate the
C++23 changes by *many* years. Nobody has yet verified how closely it conforms
to the new C++23 spec.