message: macro correction
diff: @@ -157,7 +157,7 @@ DateTime::DateTime (DT_TIME_ZONE time_zone) noexcept : time_zone_(time_zone) {
  stm.tm_isdst = -1;
  set_time(::time(nullptr), 0);
  -#elifdef clock_gettime
  +#elif defined clock_gettime
  struct timespec ts;
  ::clock_gettime(Clock_REALTIME, &ts);
  