cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration spawn/posix_spawnattr_getschedparam.c -o spawn/posix_spawnattr_getschedparam -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lnetwork -lbsd -latomic
spawn/posix_spawnattr_getschedparam.c: In function 'main':
spawn/posix_spawnattr_getschedparam.c:16:23: error: implicit declaration of function 'posix_spawnattr_getschedparam'; did you mean 'posix_spawnattr_getsigdefault'? [-Werror=implicit-function-declaration]
   16 |         if ( (errno = posix_spawnattr_getschedparam(&attr, &schedparam)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       posix_spawnattr_getsigdefault
spawn/posix_spawnattr_getschedparam.c:18:23: error: implicit declaration of function 'posix_spawnattr_setschedparam'; did you mean 'posix_spawnattr_setsigdefault'? [-Werror=implicit-function-declaration]
   18 |         if ( (errno = posix_spawnattr_setschedparam(&attr, &schedparam)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       posix_spawnattr_setsigdefault
cc1: some warnings being treated as errors