Tweaks to fix compilation on FreeBSD.

bld/get-version

@@ -9,11 +9,14 @@
 # If we can find one which matches $v[0-9].* then we assume it's
 # a version-number tag, else we just use the whole string.
 
-# we're called with pwd == src
+# we're called with pwd == TLD
 cd ..
 
-if [ -d .git ]; then
+if which git >/dev/null 2>&1 && [ -d .git ]; then
      git describe
+elif grep '\$Format:%d\$' VERSION >/dev/null 2>&1; then
+# unsubstituted VERSION, but no git available.
+    echo UNKNOWN
 else
      vers=`cat VERSION | sed 's/[(), ]/\n/ g' | grep -m 1 $v[0-9]`