#ifdef __APPLE__
-#define CLOCK_REALTIME 0
-#define CLOCK_MONOTONIC 1
+#include <mach/clock_types.h>
+#define CLOCK_REALTIME CALENDAR_CLOCK
+#define CLOCK_MONOTONIC SYSTEM_CLOCK
-void clock_gettime(int type, struct timespec *tv);
+int clock_gettime(int type, struct timespec *tv);
#endif
#define __constructor __attribute__((constructor))
#endif
+#ifndef __destructor
+#define __destructor __attribute__((destructor))
+#endif
+
#ifndef __hidden
#define __hidden __attribute__((visibility("hidden")))
#endif