Louis Dionne 43a04b1db6 [libc++] Reduce the dependency of the locale base API on the base system from the headers (#117764)
Many parts of the locale base API are only required when building the
shared/static library, but not from the headers. Document those
functions and carve out a few of those that don't work when
_XOPEN_SOURCE is defined to something old.

Fixes #117630

(cherry picked from commit f00b32e2d0ee666d32f1ddd0c687e269fab95b44)
2025-02-21 14:08:41 -08:00
..