Author: emaste
Date: Thu Jan 7 17:00:35 2016
New Revision: 293333
URL: https://svnweb.freebsd.org/changeset/base/293333
Log:
MFC r291691: newvers: Honour SOURCE_DATE_EPOCH for build reproducibility
One reason the kernel does not build reproducibly is that it includes
a timestamp in the version string. SOURCE_DATE_EPOCH provides a standard
method to address this: it should be set to the last modification time
of the source, and build processes use the specified timestamp instead
of the "current" date and time.
This change uses SOURCE_DATE_EPOCH if it is set; how it gets set needs
to be addressed elsewhere.
Modified:
stable/10/sys/conf/newvers.sh
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/conf/newvers.sh
==============================================================================
--- stable/10/sys/conf/newvers.sh Thu Jan 7 16:48:47 2016
(r293332)
+++ stable/10/sys/conf/newvers.sh Thu Jan 7 17:00:35 2016
(r293333)
@@ -87,7 +87,15 @@ then
fi
touch version
-v=`cat version` u=${USER:-root} d=`pwd` h=${HOSTNAME:-`hostname`} t=`date`
+v=`cat version` u=${USER:-root} d=`pwd` h=${HOSTNAME:-`hostname`}
+if [ -n "$SOURCE_DATE_EPOCH" ]; then
+ if ! t=`date -r $SOURCE_DATE_EPOCH 2>/dev/null`; then
+ echo "Invalid SOURCE_DATE_EPOCH" >&2
+ exit 1
+ fi
+else
+ t=`date`
+fi
i=`${MAKE:-make} -V KERN_IDENT`
compiler_v=$($(${MAKE:-make} -V CC) -v 2>&1 | grep 'version')
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