[Bug libstdc++/126365] Incorrect values for feature test macros when using

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126365

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
https://en.cppreference.com/cpp/compiler_support#C++26_library_features