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| author | Bernhard M. Wiedemann <bwiedemann@suse.de> | 2017-07-21 15:18:40 +0200 |
|---|---|---|
| committer | Bernhard M. Wiedemann <bwiedemann@suse.de> | 2017-07-21 15:21:08 +0200 |
| commit | 349be05ee5cbfd680955d19a9ec2df72966399b4 (patch) | |
| tree | e6043b0fbf2e095647ea42e66d42e1c568f9fa4a /configure.ac | |
| parent | fae66ae34fb6fcade87abb3aa48bcdbf5fead662 (diff) | |
| download | crosstool-ng-349be05ee5cbfd680955d19a9ec2df72966399b4.tar.gz crosstool-ng-349be05ee5cbfd680955d19a9ec2df72966399b4.tar.bz2 crosstool-ng-349be05ee5cbfd680955d19a9ec2df72966399b4.zip | |
Allow to override build date
in order to make builds reproducible.
See https://reproducible-builds.org/ for why this is good
and https://reproducible-builds.org/specs/source-date-epoch/
for the definition of this variable.
This date call is designed to work with both GNU date and BSD date.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac index 4f7d3d32..010c2e0f 100644 --- a/configure.ac +++ b/configure.ac @@ -424,9 +424,13 @@ AC_SEARCH_LIBS( # Lastly, take care of crosstool-NG internal values #-------------------------------------------------------------------- # Hey! We need the date! :-) -AC_SUBST( - [DATE], - [$(date +%Y%m%d)]) +DATE_FMT="%Y%m%d" +if test "x$SOURCE_DATE_EPOCH" = "x"; then + DATE=$(date "+$DATE_FMT") +else + DATE="$(date -u -d "@$SOURCE_DATE_EPOCH" "+$DATE_FMT" 2>/dev/null || date -u -r "$SOURCE_DATE_EPOCH" "+$DATE_FMT" 2>/dev/null || date -u "+$DATE_FMT")" +fi +AC_SUBST([DATE]) # Decorate the version string if needed AS_IF( |