cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration monetary/strfmon.c -o monetary/strfmon -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
[cc@relibc::platform::sys:741 INFO] TODO: getrlimit(3, 0x7ffffffffbd0): not implemented
[cc1@relibc::platform::sys:741 INFO] TODO: getrlimit(3, 0x7ffffffffae0): not implemented
[cc1@relibc::platform::sys:741 INFO] TODO: getrlimit(9, 0x7ffffffffab0): not implemented
[cc1@relibc::platform::sys:741 INFO] TODO: getrlimit(9, 0x7ffffffffae0): not implemented
[cc1@relibc::platform::sys:741 INFO] TODO: getrlimit(5, 0x7ffffffffae0): not implemented
[cc1@relibc::platform::sys:741 INFO] TODO: getrlimit(9, 0x7ffffffffab0): not implemented
monetary/strfmon.c: In function 'main':
monetary/strfmon.c:21:14: error: implicit declaration of function 'strfmon' [-Werror=implicit-function-declaration]
   21 |         if ( strfmon(output, sizeof(output),
      |              ^~~~~~~
monetary/strfmon.c:21:14: warning: incompatible implicit declaration of built-in function 'strfmon' [-Wbuiltin-declaration-mismatch]
cc1: some warnings being treated as errors