https://gitlab.com/surfraw/Surfraw/merge_requests/2

commit b5c3922105ccf5fbfddb9819daf2e662827f6d2c
Author: Bernhard M. Wiedemann <bwiedemann@suse.de>
Date:   Fri Mar 30 04:29:22 2018 +0200

    Use ChangeLog date instead of build date
    
    in order to make builds reproducible.
    See https://reproducible-builds.org/ for why this is good
    
    Without this patch, surfraw.lsm differed between builds.

Index: surfraw-2.3.0/configure
===================================================================
--- surfraw-2.3.0.orig/configure
+++ surfraw-2.3.0/configure
@@ -2504,7 +2504,7 @@ fi
 
 
 
-ISODATE=`date +%Y-%m-%d`
+ISODATE=`date -u -r ChangeLog +%Y-%m-%d`