configure: display correct version for md5sum

The old code simply scanned for the first digit, then munched anything
after that. This didn't work for md5sum, as it would see the "5" and
treat "5sum" as the version instead.

This patch tweaks the algorithm so that it looks for a second
consecutive digit (or dot) after the first. Since "md5sum" has only one
digit, the new code skips over it as intended.

1 files changed, 2 insertions, 2 deletions

diff --git a/configure b/configure
index 814626481f5..50d24c1bec9 100755
--- a/configure
+++ b/configure
@@ -104,8 +104,8 @@ probe() {
         T=$(command -v $P 2>&1)
         if [ $? -eq 0 ]
         then
-            VER0=$($P --version 2>/dev/null | head -1 \
-                |  sed -e 's/[^0-9]*\([vV]\?[0-9.]\+[^ ]*\).*/\1/' )
+            VER0=$($P --version 2>/dev/null \
+                |  grep -o '[vV]\?[0-9][0-9.][a-z0-9.-]*' | head -1 )
             if [ $? -eq 0 -a "x${VER0}" != "x" ]
             then
               VER="($VER0)"