cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations locale/newlocale.c -o locale/newlocale -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
locale/newlocale.c:5:48: error: ‘newlocale’ undeclared here (not in a function); did you mean ‘setlocale’?
    5 | locale_t (*foo)(int, const char *, locale_t) = newlocale;
      |                                                ^~~~~~~~~
      |                                                setlocale