build: PASS
conformance/interfaces/sched_setscheduler/21-1: build: PASS
link: FAILED
conformance/interfaces/sched_setscheduler/21-1: link: FAILED: Linker output:
ld: error: undefined symbol: sched_setscheduler
>>> referenced by 21-1.c
>>>               conformance/interfaces/sched_setscheduler/21-1.o:(main)
cc: error: linker command failed with exit code 1 (use -v to see invocation)