Improve libtool version parsing (#22122)

diff --git a/autogen.sh b/autogen.sh
index c3d11caad731a36fde184132d5e5f36615480090..820c457fe8f3a57cf1d861ec008678e1360fb17c 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -29,7 +29,7 @@ DIE=0
 
 have_libtool=false
 if $LIBTOOLIZE --version < /dev/null > /dev/null 2>&1 ; then
-       libtool_version=`$LIBTOOLIZE --version | sed 's/^[^0-9]*\([0-9].[0-9.]*\).*/\1/'`
+       libtool_version=`$LIBTOOLIZE --version | sed 's/^.* \([0-9][.][0-9.]*\)[^ ]*$/\1/'`
        case $libtool_version in
            1.4*|1.5*|1.6*|1.7*|2*)
                have_libtool=true