# First try git-describe, then see if there is a version file
# (included in release tarballs), then default
-VN=$(git-describe --abbrev=4 HEAD 2>/dev/null) ||
-VN=$(cat version) ||
-VN="$DEF_VER"
+if VN=$(git-describe --abbrev=4 HEAD 2>/dev/null); then
+ VN=$(echo "$VN" | sed -e 's/-/./g');
+else
+ VN=$(cat version) || VN="$DEF_VER"
+fi
VN=$(expr "$VN" : v*'\(.*\)')
+
+dirty=$(sh -c 'git-diff-index --name-only HEAD' 2>/dev/null) || dirty=
+case "$dirty" in
+'')
+ ;;
+*)
+ VN="$VN-dirty" ;;
+esac
+
if test -r $GVF
then
VC=$(sed -e 's/^GIT_VERSION = //' <$GVF)