CLEANUP: time: switch clockid_t to empty_t when not available
This is cleaner than using an int. We also get rid of the constants
that we don't need nor use.
diff --git a/include/common/compat.h b/include/common/compat.h
index 07b3666..e0f00dc 100644
--- a/include/common/compat.h
+++ b/include/common/compat.h
@@ -106,13 +106,8 @@
/* systems without such defines do not know clockid_t */
#if !(_POSIX_TIMERS > 0) || (_POSIX_C_SOURCE < 199309L)
-#define clockid_t int
-#undef CLOCK_REALTIME
-#undef CLOCK_MONOTONIC
-#undef CLOCK_THREAD_CPUTIME_ID
-#define CLOCK_REALTIME 0
-#define CLOCK_MONOTONIC 1
-#define CLOCK_THREAD_CPUTIME_ID 2
+#undef clockid_t
+#define clockid_t empty_t
#endif
#if defined(TPROXY) && defined(NETFILTER)