Change MacOS detection logic for clock_gettime to hopefully cover all flavors

src/misc.c

@@ -57,48 +57,64 @@
 #include "misc.h"
 #include "serial.h"
 #include "network.h"
+
 #ifdef __APPLE__
 
-#ifndef HAVE_CLOCK_GETTIME
+#include <AvailabilityMacros.h>
+
+#if AVAILABLE_MAC_OS_X_VERSION_10_8_AND_LATER
+
+#else
 
 #   include <mach/mach_time.h>
-#	ifndef __clockid_t_defined
-		typedef enum clockid_t;
-		#define __clockid_t_defined 1
-#	endif  /* __clockid_t_defined */
+#    ifndef __clockid_t_defined
+typedef int clockid_t;
+#define __clockid_t_defined 1
+#    endif  /* __clockid_t_defined */
 
-#	define CLOCK_REALTIME 0
-#	define CLOCK_MONOTONIC 6
+#    define CLOCK_REALTIME 0
+#    define CLOCK_MONOTONIC 1
 
-int clock_gettime(clockid_t clock_id, struct timespec* tp)
+int clock_gettime(clockid_t clock_id, struct timespec *tp)
 {
-	if (clock_id == CLOCK_REALTIME) {
-		struct timeval t;
-		if (gettimeofday(&t, NULL) != 0)
-			return -1;
-		tp->tv_sec = t.tv_sec;
-		tp->tv_nsec = t.tv_usec * 1000;
-	}
-	else if (clock_id == CLOCK_MONOTONIC) {
-		static mach_timebase_info_data_t info = { 0, 0 };
-		if (info.denom == 0)
-			mach_timebase_info(&info);
-		uint64_t t = mach_absolute_time() * info.numer / info.denom;
-		tp->tv_sec = t / 1000000000;
-		tp->tv_nsec = t % 1000000000;
-	}
-	else {
-		errno = EINVAL;
-		return -1;
-	}
+    if (clock_id == CLOCK_REALTIME)
+    {
+        struct timeval t;
 
-	return 0;
+        if (gettimeofday(&t, NULL) != 0)
+        {
+            return -1;
+        }
+
+        tp->tv_sec = t.tv_sec;
+        tp->tv_nsec = t.tv_usec * 1000;
+    }
+    else if (clock_id == CLOCK_MONOTONIC)
+    {
+        static mach_timebase_info_data_t info = { 0, 0 };
+
+        if (info.denom == 0)
+        {
+            mach_timebase_info(&info);
+        }
+
+        uint64_t t = mach_absolute_time() * info.numer / info.denom;
+        tp->tv_sec = t / 1000000000;
+        tp->tv_nsec = t % 1000000000;
+    }
+    else
+    {
+        errno = EINVAL;
+        return -1;
+    }
+
+    return 0;
 }
+
 #endif // !HAVE_CLOCK_GETTIME
 
 #endif // __APPLE__
 
-
 /**
  * \brief Convert from binary to 4-bit BCD digits, little-endian
  * \param bcd_data