gistfile1.diff

diff --git a/src/porting.h b/src/porting.h
index ea7f31b..fadeea4 100644
--- a/src/porting.h
+++ b/src/porting.h
@@ -213,7 +213,17 @@
        inline u32 getTimeNs()
        {
                struct timespec ts;
-               clock_gettime(CLOCK_REALTIME, &ts);
+#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
+               clock_serv_t cclock;
+               mach_timespec_t mts;
+               host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
+               clock_get_time(cclock, &mts);
+               mach_port_deallocate(mach_task_self(), cclock);
+               ts->tv_sec = mts.tv_sec;
+               ts->tv_nsec = mts.tv_nsec;
+#else
+               clock_gettime(CLOCK_REALTIME, ts);
+#endif
                return ts.tv_sec * 1000000000 + ts.tv_nsec;
        }