Undef graceful handling

conts/posix/test0/include/tests.h

@@ -25,5 +25,6 @@ int clonetest(void);
 int exectest(pid_t);
 int user_mutex_test(void);
 int small_io_test(void);
+int undeftest(void);
 
 #endif /* __TEST0_TESTS_H__ */

conts/posix/test0/main.c

@@ -40,6 +40,8 @@ int main(int argc, char *argv[])
 	wait_pager(pagerid);
 
 	printf("\n%s: Running POSIX API tests.\n", __TASKNAME__);
+	
+	undeftest();
 
 	small_io_test();