From ccf9e80c01d02efa982d96eeb22d63fc29b55110 Mon Sep 17 00:00:00 2001
From: cyberman54 <cyberman@obh.snafu.de>
Date: Mon, 3 May 2021 19:37:39 +0200
Subject: [PATCH] add COMPILETIME macro

---
 src/rtctime.cpp    |  2 +-
 src/timekeeper.cpp | 13 ++++---------
 2 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/src/rtctime.cpp b/src/rtctime.cpp
index 29ad18c6..cb87c9de 100644
--- a/src/rtctime.cpp
+++ b/src/rtctime.cpp
@@ -32,7 +32,7 @@ uint8_t rtc_init(void) {
     if (!Rtc.IsDateTimeValid() || !timeIsValid(t)) {
       ESP_LOGW(TAG, "RTC has no recent time, setting to compiled time");
       Rtc.SetDateTime(
-          RtcDateTime(compiledUTC() - SECS_YR_2000)); // epoch -> sec2000
+          RtcDateTime(_COMPILETIME - SECS_YR_2000)); // epoch -> sec2000
     }
 #endif
 
diff --git a/src/timekeeper.cpp b/src/timekeeper.cpp
index 45f0d153..885716d5 100644
--- a/src/timekeeper.cpp
+++ b/src/timekeeper.cpp
@@ -8,6 +8,8 @@
 #endif
 #endif
 
+#define _COMPILETIME myTZ.toUTC(RtcDateTime(__DATE__, __TIME__).Epoch32Time())
+
 // Local logging tag
 static const char TAG[] = __FILE__;
 
@@ -121,12 +123,11 @@ void IRAM_ATTR setMyTime(uint32_t t_sec, uint16_t t_msec,
              _seconds(), mytimesource);
   } else {
     timesyncer.attach(TIME_SYNC_INTERVAL_RETRY * 60, setTimeSyncIRQ);
-    time_t unix_sec_at_compilation = compiledUTC();
     ESP_LOGD(TAG,
              "[%0.3f] Failed to synchronise time from source %c | unix sec "
              "obtained from source: %d | unix sec at program compilation: %d",
              _seconds(), timeSetSymbols[mytimesource], time_to_set,
-             unix_sec_at_compilation);
+             _COMPILETIME);
   }
 }
 
@@ -215,13 +216,7 @@ void IRAM_ATTR CLOCKIRQ(void) {
 // helper function to check plausibility of a time
 time_t timeIsValid(time_t const t) {
   // is it a time in the past? we use compile date to guess
-  return (t >= compiledUTC() ? t : 0);
-}
-
-// helper function to convert compile time to UTC time
-time_t compiledUTC(void) {
-  static time_t t = myTZ.toUTC(RtcDateTime(__DATE__, __TIME__).Epoch32Time());
-  return t;
+  return (t >= _COMPILETIME ? t : 0);
 }
 
 // helper function to calculate serial transmit time