cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sched/sched_getscheduler.c -o sched/sched_getscheduler -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt 
relibc getrlimit(3, 0x7ffffffffc80): not implemented
relibc getrlimit(3, 0x7ffffffffbb0): not implemented
relibc getrlimit(9, 0x7ffffffffb70): not implemented
relibc getrlimit(9, 0x7ffffffffba0): not implemented
relibc getrlimit(5, 0x7ffffffffba0): not implemented
relibc getrlimit(9, 0x7ffffffffb70): not implemented
sched/sched_getscheduler.c:6:21: error: 'sched_getscheduler' undeclared here (not in a function)
    6 | int (*foo)(pid_t) = sched_getscheduler;
      |                     ^~~~~~~~~~~~~~~~~~