+define(VERSION_ID,esyscmd([
+ V=`git describe 2>/dev/null | sed -e 's/rel-//g' | sed -e 's/-/~/'`;
+ [ -z "$V" -a -r configure ] \
+ && V=`grep "PACKAGE_STRING=" configure | cut -d"'" -f2 | cut -d' ' -f2`
+ ( [ -n "$V" ] && echo "$V" || echo "??" ) | tr -d '\n';
+]))