cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sched/SCHED_SPORADIC.c -o sched/SCHED_SPORADIC -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
sched/SCHED_SPORADIC.c:3:17: error: use of undeclared identifier 'SCHED_SPORADIC'
int const foo = SCHED_SPORADIC;
                ^
1 error generated.