[core] log_clock_gettime->clock_gettime for 64-bit

map log_clock_gettime() directly to clock_gettime() for 64-bit time_t
(on systems with clock_gettime())

src/log.c

@@ -24,6 +24,8 @@
 unix_time64_t log_epoch_secs = 0;
 unix_time64_t log_monotonic_secs = 0;
 
+#if !defined(HAVE_CLOCK_GETTIME) || !HAS_TIME_BITS64
+
 int log_clock_gettime (const int clockid, unix_timespec64_t * const ts) {
   #ifdef HAVE_CLOCK_GETTIME
    #if HAS_TIME_BITS64
@@ -63,6 +65,9 @@ int log_clock_gettime_realtime (unix_timespec64_t *ts) {
   #endif
 }
 
+#endif /* !defined(HAVE_CLOCK_GETTIME) || !HAS_TIME_BITS64 */
+
+
 /* retry write on EINTR or when not all data was written */
 ssize_t write_all(int fd, const void * const buf, size_t count) {
     ssize_t written = 0;

src/log.h

@@ -8,8 +8,13 @@
 extern unix_time64_t log_epoch_secs;
 extern unix_time64_t log_monotonic_secs;
 
+#if defined(HAVE_CLOCK_GETTIME) && HAS_TIME_BITS64
+#define log_clock_gettime(clockid,ts)  clock_gettime((clockid),(ts))
+#define log_clock_gettime_realtime(ts) clock_gettime(CLOCK_REALTIME,(ts))
+#else
 int log_clock_gettime(int clockid, unix_timespec64_t *ts);
 int log_clock_gettime_realtime (unix_timespec64_t *ts);
+#endif
 
 ssize_t write_all(int fd, const void* buf, size_t count);