posix api test

[Szabolcs Nagy <nsz@port70.net>]

i have ugly scripts to generate the posix coverage tables
but i thought it's worth creating .c files for each
posix .h and let the compiler do the checks

i put the code into my test repo for now
http://nsz.repo.hu/git/?p=libc-test;a=tree;f=src/api

(most of [OB] interfaces are not included, but most optional stuff are)

and the errors found:

fcntl.c:29: error: 'O_TTY_INIT' undeclared (first use in this function)
fmtmsg.c:2:20: error: fmtmsg.h: No such file or directory
ndbm.c:1:18: error: ndbm.h: No such file or directory
netdb.c:60: error: 'NI_NUMERICSCOPE' undeclared (first use in this function)
pthread.c:73: error: 'pthread_cleanup_pop' undeclared (first use in this function)
pthread.c:74: error: 'pthread_cleanup_push' undeclared (first use in this function)
pthread.c:91: error: 'pthread_getschedparam' undeclared (first use in this function)
pthread.c:98: error: 'pthread_mutex_getprioceiling' undeclared (first use in this function)
pthread.c:101: error: 'pthread_mutex_setprioceiling' undeclared (first use in this function)
pthread.c:131: error: 'pthread_setschedparam' undeclared (first use in this function)
pthread.c:132: error: 'pthread_setschedprio' undeclared (first use in this function)
pthread.c:144: error: 'pthread_getcpuclockid' undeclared (first use in this function)
sched.c:20: error: 'SCHED_SPORADIC' undeclared (first use in this function)
spawn.c:43: error: 'posix_spawnattr_getschedparam' undeclared (first use in this function)
spawn.c:44: error: 'posix_spawnattr_getschedpolicy' undeclared (first use in this function)
spawn.c:45: error: 'posix_spawnattr_setschedparam' undeclared (first use in this function)
spawn.c:46: error: 'posix_spawnattr_setschedpolicy' undeclared (first use in this function)
stdlib.c:22: error: 'WNOHANG' undeclared (first use in this function)
stdlib.c:25: error: 'WUNTRACED' undeclared (first use in this function)
sys_sem.c:21: error: initialization from incompatible pointer type
	struct semid_ds x; unsigned short *p = &x.sem_nsems;
sys_shm.c:7: error: 'shmatt_t' undeclared (first use in this function)
sys_shm.c:20: error: 'y' undeclared (first use in this function)
	struct shmid_ds x; shmatt_t *y = &x.shm_nattch;
sys_types.c:21: error: initialization makes pointer from integer without a cast
	timer_t x = 1;
unistd.c:29: error: '_CS_POSIX_V7_THREADS_CFLAGS' undeclared (first use in this function)
unistd.c:30: error: '_CS_POSIX_V7_THREADS_LDFLAGS' undeclared (first use in this function)
unistd.c:32: error: '_CS_V7_ENV' undeclared (first use in this function)
unistd.c:59: error: '_PC_TIMESTAMP_RESOLUTION' undeclared (first use in this function)
unistd.c:180: error: '_SC_XOPEN_UUCP' undeclared (first use in this function)