zircon/third_party/ulib/musl/src/ipc/semctl.c - fuchsia - Git at Google

 #include <errno.h>
 #include <sys/sem.h>

 int semctl(int id, int num, int cmd, ...) {
   errno = ENOSYS;
   return -1;
 }
	#include <errno.h>
	#include <sys/sem.h>

	int semctl(int id, int num, int cmd, ...) {
	errno = ENOSYS;
	return -1;
	}