From: Bernhard M. Wiedemann <bwiedemann@suse.de>
Date: Thu, 5 Oct 2017 12:13:53 +0000 (+0200)
Subject: configure: allow to override build date
X-Git-Tag: 3.3-pre1~68
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6f54210db29db71fd84e0e880435840a9b76da3c;p=thirdparty%2Fchrony.git

configure: allow to override build date

in order to make builds reproducible.
See https://reproducible-builds.org/ for why this is good
and https://reproducible-builds.org/specs/source-date-epoch/
for the definition of this variable.
---

diff --git a/configure b/configure
index 45eddf15..7b57992d 100755
--- a/configure
+++ b/configure
@@ -550,7 +550,11 @@ then
     split_seconds=$ntp_era_split
     split_days=0
   else
-    split_seconds=`date '+%s'`
+    if [ "x$SOURCE_DATE_EPOCH" != "x" ]; then
+      split_seconds=$SOURCE_DATE_EPOCH
+    else
+      split_seconds=`date '+%s'`
+    fi
     if [ "x$split_seconds" = "x" ]; then
       echo "error: could not get current time, --with-ntp-era option is needed"
       exit 1