Date: Thu, 3 Dec 2015 12:17:09 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r291691 - head/sys/conf Message-ID: <201512031217.tB3CH9m8084553@repo.freebsd.org>
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Author: emaste Date: Thu Dec 3 12:17:09 2015 New Revision: 291691 URL: https://svnweb.freebsd.org/changeset/base/291691 Log: newvers: Honour SOURCE_DATE_EPOCH as a build reproducibility measure 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. Reviewed by: bapt MFC after: 1 week Sponsored by: The FreeBSD Foundation Modified: head/sys/conf/newvers.sh Modified: head/sys/conf/newvers.sh ============================================================================== --- head/sys/conf/newvers.sh Thu Dec 3 11:45:12 2015 (r291690) +++ head/sys/conf/newvers.sh Thu Dec 3 12:17:09 2015 (r291691) @@ -97,7 +97,15 @@ 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 -w 'version')
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