build: do not error out if clock_gettime is not found on darwin

Also prefer clock_gettime over mach_absolute_time on darwin.
clock_gettime is only available in darwin 10.12 and later.

Hopefully fixes #283.

1 files changed, 4 insertions, 4 deletions

diff --git a/tools/dav1d.c b/tools/dav1d.c
index cf6f315..72ee894 100644
--- a/tools/dav1d.c
+++ b/tools/dav1d.c
@@ -64,14 +64,14 @@ static uint64_t get_time_nanos(void) {
     LARGE_INTEGER t;
     QueryPerformanceCounter(&t);
     return 1000000000 * t.QuadPart / frequency.QuadPart;
-#elif defined(__APPLE__)
-    mach_timebase_info_data_t info;
-    mach_timebase_info(&info);
-    return mach_absolute_time() * info.numer / info.denom;
 #elif defined(HAVE_CLOCK_GETTIME)
     struct timespec ts;
     clock_gettime(CLOCK_MONOTONIC, &ts);
     return 1000000000ULL * ts.tv_sec + ts.tv_nsec;
+#elif defined(__APPLE__)
+    mach_timebase_info_data_t info;
+    mach_timebase_info(&info);
+    return mach_absolute_time() * info.numer / info.denom;
 #endif
 }