cc -O2 -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations libintl/dngettext_l.c -o libintl/dngettext_l -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lintl -lcrypt
libintl/dngettext_l.c:5:75: error: unknown type name 'locale_t'
    5 | char *(*foo)(const char *, const char *, const char *, unsigned long int, locale_t) = dngettext_l;
      |                                                                           ^~~~~~~~