cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/setresuid.c -o unistd/setresuid -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
unistd/setresuid.c:11:35: error: use of undeclared identifier 'setresuid'; did you mean 'setreuid'?
int (*foo)(uid_t, uid_t, uid_t) = setresuid;
                                  ^~~~~~~~~
                                  setreuid
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/unistd.h:595:6: note: 'setreuid' declared here
int      setreuid(uid_t, uid_t) __DARWIN_ALIAS(setreuid);
         ^
unistd/setresuid.c:11:7: error: incompatible function pointer types initializing 'int (*)(uid_t, uid_t, uid_t)' (aka 'int (*)(unsigned int, unsigned int, unsigned int)') with an expression of type 'int (uid_t, uid_t)' (aka 'int (unsigned int, unsigned int)') [-Werror,-Wincompatible-function-pointer-types]
int (*foo)(uid_t, uid_t, uid_t) = setresuid;
      ^                           ~~~~~~~~~
2 errors generated.