cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration spawn/posix_spawnattr_getschedpolicy.c -o spawn/posix_spawnattr_getschedpolicy -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lnetwork -lbsd -latomic
spawn/posix_spawnattr_getschedpolicy.c: In function 'main':
spawn/posix_spawnattr_getschedpolicy.c:15:23: error: implicit declaration of function 'posix_spawnattr_getschedpolicy'; did you mean 'posix_spawnattr_getsigdefault'? [-Werror=implicit-function-declaration]
   15 |         if ( (errno = posix_spawnattr_getschedpolicy(&attr, &schedpolicy)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       posix_spawnattr_getsigdefault
spawn/posix_spawnattr_getschedpolicy.c:17:23: error: implicit declaration of function 'posix_spawnattr_setschedpolicy'; did you mean 'posix_spawnattr_setsigdefault'? [-Werror=implicit-function-declaration]
   17 |         if ( (errno = posix_spawnattr_setschedpolicy(&attr, schedpolicy)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       posix_spawnattr_setsigdefault
cc1: some warnings being treated as errors