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| author | emaste <emaste@FreeBSD.org> | 2016-01-07 17:00:35 +0000 |
|---|---|---|
| committer | emaste <emaste@FreeBSD.org> | 2016-01-07 17:00:35 +0000 |
| commit | e7b112012dcca2e1a25fae7b7f859d56c3ae6266 (patch) | |
| tree | 37d6f87f440f84c000f69293ff7e9f4b514fc215 /sys/conf/newvers.sh | |
| parent | 8c4e8fd3fd280f39cdbd53cf5317ec7cb2bb7914 (diff) | |
| download | FreeBSD-src-e7b112012dcca2e1a25fae7b7f859d56c3ae6266.zip FreeBSD-src-e7b112012dcca2e1a25fae7b7f859d56c3ae6266.tar.gz | |
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.
Diffstat (limited to 'sys/conf/newvers.sh')
| -rw-r--r-- | sys/conf/newvers.sh | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/sys/conf/newvers.sh b/sys/conf/newvers.sh index 55ac59b..97bec5c 100644 --- a/sys/conf/newvers.sh +++ b/sys/conf/newvers.sh @@ -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') |
