cc -pipe -O   -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations locale/getlocalename_l.c -o locale/getlocalename_l -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lrt -lcrypt
locale/getlocalename_l.c:5:37: error: 'getlocalename_l' undeclared here (not in a function); did you mean 'setlocale'?
 const char *(*foo)(int, locale_t) = getlocalename_l;
                                     ^~~~~~~~~~~~~~~
                                     setlocale