[autogen.sh] Make sed script portable

1 files changed, 1 insertions, 1 deletions

diff --git a/autogen.sh b/autogen.sh
index 37db90e0..2deaa937 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -36,7 +36,7 @@ if test "X$CONFIGURE_IN" = X; then
 fi
 
 extract_version() {
-	grep "^ *$1" $CONFIGURE_IN | sed 's/.*(\[\?\([^])]\+\)]\?).*/\1/'
+	grep "^ *$1" $CONFIGURE_IN | sed 's/.*(\[*\([^])]*\)]*).*/\1/'
 }
 
 autoconf_min_vers=`extract_version AC_PREREQ`