cc -O2 -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations monetary/strfmon_l.c -o monetary/strfmon_l -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lintl -lcrypt
monetary/strfmon_l.c:5:40: error: unknown type name 'locale_t'
    5 | ssize_t (*foo)(char *restrict, size_t, locale_t, const char *restrict, ...) = strfmon_l;
      |                                        ^~~~~~~~