/t/tmp.1q8r9dZAtX > cat test.c
    int main() {
    	char *test = "test";
    	int i = 10;
    	return test == i;
    }
    /t/tmp.1q8r9dZAtX > cc test.c
    test.c: In function ‘main’:
    test.c:4:14: warning: comparison between pointer and integer
      return test == i;
                  ^~