cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sched/sched_setparam.c -o sched/sched_setparam -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
sched/sched_setparam.c:6:19: error: expected identifier
    6 | int (*foo)(pid_t, const struct sched_param *) = sched_setparam;
      |                   ^
sched/sched_setparam.c:6:49: error: use of undeclared identifier 'sched_setparam'
    6 | int (*foo)(pid_t, const struct sched_param *) = sched_setparam;
      |                                                 ^
2 errors generated.