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From b951f6292f74edd114a403b6be8752070c8d819f Mon Sep 17 00:00:00 2001
From: Jonathan McCrohan <jmccrohan@gmail.com>
Date: Thu, 12 Mar 2015 15:21:58 -0700
Subject: [PATCH] configure.ac: Support external BUILD_DATE values
Support reproducible builds [1] by allowing build systems to pass in an
external value for BUILD_DATE.
autoreconf has been run to resync configure with configure.ac changes.
[1] https://wiki.debian.org/ReproducibleBuilds
Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
---
configure | 8 ++++++++
configure.ac | 7 ++++++-
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/configure b/configure
index 082dd99..eeb8115 100755
--- a/configure
+++ b/configure
@@ -2186,11 +2186,19 @@ ac_configure="$SHELL $ac_aux_dir/configure" # Please don't use this var.
ac_config_files="$ac_config_files Makefile"
+# allow BUILD_DATE to be externally set for build reproducibility
+if test "$BUILD_DATE"; then
+ cat >>confdefs.h <<_ACEOF
+#define BUILD_DATE "$BUILD_DATE"
+_ACEOF
+
+else
cat >>confdefs.h <<_ACEOF
#define BUILD_DATE "`/bin/date`"
_ACEOF
+fi
CFLAGS="-O2 -Wall"
diff --git a/configure.ac b/configure.ac
index e50c986..7ae0db9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,8 +7,13 @@ AC_INIT([wavemon], [0.7.6], [gerrit@erg.abdn.ac.uk], [wavemon-current],
# Variables
AC_CONFIG_AUX_DIR([config])
AC_CONFIG_FILES([Makefile])
-AC_DEFINE_UNQUOTED([BUILD_DATE], ["`/bin/date`"],
+# allow BUILD_DATE to be externally set for build reproducibility
+if test "$BUILD_DATE"; then
+ AC_DEFINE_UNQUOTED(BUILD_DATE, ["$BUILD_DATE"])
+else
+ AC_DEFINE_UNQUOTED([BUILD_DATE], ["`/bin/date`"],
[date wavemon was last configured and built])
+fi
CFLAGS="-O2 -Wall"
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