1--- a/configure.ac
2+++ b/configure.ac
3@@ -274,7 +274,11 @@ fi
4 AC_MSG_CHECKING([the version of $PATCH])
5 if $PATCH --version 2> /dev/null | grep GNU >/dev/null; then
6   set -- `$PATCH --version 2> /dev/null`
7-  patch_version=$2
8+  if test x$1 = xGNU ; then
9+    patch_version=$3
10+  else
11+    patch_version=$2
12+  fi
13   AC_MSG_RESULT($patch_version)
14   saved_IFS=$IFS; IFS='.'
15   set -- $patch_version
16