cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/getresuid.c -o unistd/getresuid -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
unistd/getresuid.c:11:65: error: use of undeclared identifier 'getresuid'
   11 | int (*foo)(uid_t *restrict, uid_t *restrict, uid_t *restrict) = getresuid;
      |                                                                 ^
1 error generated.