clock.h: add monotonic error for darwin

diff --git a/src/clock.h b/src/clock.h
index 328b3af827844505db8b57c656b40a0f55564e7c..1a169ec847b950435cac9199c3841a601452f081 100644 (file)
--- a/src/clock.h
+++ b/src/clock.h
@@ -26,6 +26,7 @@
 #endif
 
 #ifdef PLATFORM_DARWIN
+#error "Platforms without monotonic clocks are not supported!"
 #define CLOCK_MONOTONIC 0
 #define CLOCK_REALTIME 0