cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_setcanceltype.c -o pthread/pthread_setcanceltype -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
pthread/pthread_setcanceltype.c: In function ‘start’:
pthread/pthread_setcanceltype.c:13:23: error: implicit declaration of function ‘pthread_setcanceltype’ [-Wimplicit-function-declaration]
   13 |         if ( (errno = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old_state)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~
pthread/pthread_setcanceltype.c:13:45: error: ‘PTHREAD_CANCEL_ASYNCHRONOUS’ undeclared (first use in this function)
   13 |         if ( (errno = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old_state)) )
      |                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~~
pthread/pthread_setcanceltype.c:13:45: note: each undeclared identifier is reported only once for each function it appears in
pthread/pthread_setcanceltype.c:15:27: error: ‘PTHREAD_CANCEL_DEFERRED’ undeclared (first use in this function)
   15 |         if ( old_state != PTHREAD_CANCEL_DEFERRED )
      |                           ^~~~~~~~~~~~~~~~~~~~~~~
pthread/pthread_setcanceltype.c: In function ‘main’:
pthread/pthread_setcanceltype.c:34:45: error: ‘PTHREAD_CANCEL_DEFERRED’ undeclared (first use in this function)
   34 |         if ( (errno = pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, &old_state)) )
      |                                             ^~~~~~~~~~~~~~~~~~~~~~~
pthread/pthread_setcanceltype.c:41:23: error: implicit declaration of function ‘pthread_cancel’; did you mean ‘pthread_once’? [-Wimplicit-function-declaration]
   41 |         if ( (errno = pthread_cancel(thread)) )
      |                       ^~~~~~~~~~~~~~
      |                       pthread_once
pthread/pthread_setcanceltype.c:46:24: error: ‘PTHREAD_CANCELED’ undeclared (first use in this function); did you mean ‘PTHREAD_NULL’?
   46 |         if ( result != PTHREAD_CANCELED )
      |                        ^~~~~~~~~~~~~~~~
      |                        PTHREAD_NULL