cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_setcancelstate.c -o pthread/pthread_setcancelstate -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
pthread/pthread_setcancelstate.c: In function ‘start’:
pthread/pthread_setcancelstate.c:19:23: error: implicit declaration of function ‘pthread_setcancelstate’ [-Wimplicit-function-declaration]
   19 |         if ( (errno = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_state)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~
pthread/pthread_setcancelstate.c:19:46: error: ‘PTHREAD_CANCEL_DISABLE’ undeclared (first use in this function)
   19 |         if ( (errno = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old_state)) )
      |                                              ^~~~~~~~~~~~~~~~~~~~~~
pthread/pthread_setcancelstate.c:19:46: note: each undeclared identifier is reported only once for each function it appears in
pthread/pthread_setcancelstate.c:21:27: error: ‘PTHREAD_CANCEL_ENABLE’ undeclared (first use in this function); did you mean ‘PTHREAD_CREATE_JOINABLE’?
   21 |         if ( old_state != PTHREAD_CANCEL_ENABLE )
      |                           ^~~~~~~~~~~~~~~~~~~~~
      |                           PTHREAD_CREATE_JOINABLE
pthread/pthread_setcancelstate.c: In function ‘main’:
pthread/pthread_setcancelstate.c:43:46: error: ‘PTHREAD_CANCEL_ENABLE’ undeclared (first use in this function); did you mean ‘PTHREAD_CREATE_JOINABLE’?
   43 |         if ( (errno = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old_state)) )
      |                                              ^~~~~~~~~~~~~~~~~~~~~
      |                                              PTHREAD_CREATE_JOINABLE
pthread/pthread_setcancelstate.c:53:23: error: implicit declaration of function ‘pthread_cancel’; did you mean ‘pthread_once’? [-Wimplicit-function-declaration]
   53 |         if ( (errno = pthread_cancel(thread)) )
      |                       ^~~~~~~~~~~~~~
      |                       pthread_once
pthread/pthread_setcancelstate.c:65:24: error: ‘PTHREAD_CANCELED’ undeclared (first use in this function); did you mean ‘PTHREAD_NULL’?
   65 |         if ( result != PTHREAD_CANCELED )
      |                        ^~~~~~~~~~~~~~~~
      |                        PTHREAD_NULL