Date: Thu, 7 Jan 2016 17:00:35 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r293333 - stable/10/sys/conf Message-ID: <201601071700.u07H0Zu8067228@repo.freebsd.org>
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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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