cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations locale/freelocale.c -o locale/freelocale -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
locale/freelocale.c:5:13: error: a parameter list without types is only allowed in a function definition
    5 | void (*foo)(locale_t) = freelocale;
      |             ^
locale/freelocale.c:5:25: error: use of undeclared identifier 'freelocale'; did you mean 'setlocale'?
    5 | void (*foo)(locale_t) = freelocale;
      |                         ^~~~~~~~~~
      |                         setlocale
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/locale.h:53:8: note: 'setlocale' declared here
   53 | char            *setlocale(int, const char *);
      |                  ^
2 errors generated.