build: FAILED conformance/interfaces/pthread_spin_init/2-1: build: FAILED: Compiler output: conformance/interfaces/pthread_spin_init/2-1.c:58:53: error: use of undeclared identifier 'S_IRUSR' shm_fd = shm_open(shm_name, O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR); ^ conformance/interfaces/pthread_spin_init/2-1.c:58:61: error: use of undeclared identifier 'S_IWUSR' shm_fd = shm_open(shm_name, O_RDWR|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR); ^ 2 errors generated.