cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration spawn/posix_spawnattr_setschedparam.c -o spawn/posix_spawnattr_setschedparam -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lnetwork -lbsd -latomic
spawn/posix_spawnattr_setschedparam.c: In function 'main':
spawn/posix_spawnattr_setschedparam.c:28:14: error: implicit declaration of function 'sched_getparam'; did you mean 'sched_getcpu'? [-Werror=implicit-function-declaration]
   28 |         if ( sched_getparam(0, &param) < 0 )
      |              ^~~~~~~~~~~~~~
      |              sched_getcpu
spawn/posix_spawnattr_setschedparam.c:33:55: error: 'POSIX_SPAWN_SETSCHEDPARAM' undeclared (first use in this function); did you mean 'POSIX_SPAWN_SETSID'?
   33 |         if ( (errno = posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETSCHEDPARAM)) )
      |                                                       ^~~~~~~~~~~~~~~~~~~~~~~~~
      |                                                       POSIX_SPAWN_SETSID
spawn/posix_spawnattr_setschedparam.c:33:55: note: each undeclared identifier is reported only once for each function it appears in
spawn/posix_spawnattr_setschedparam.c:35:23: error: implicit declaration of function 'posix_spawnattr_setschedparam'; did you mean 'posix_spawnattr_setsigdefault'? [-Werror=implicit-function-declaration]
   35 |         if ( (errno = posix_spawnattr_setschedparam(&attr, &param)) )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                       posix_spawnattr_setsigdefault
cc1: some warnings being treated as errors