--- /dev/null
+From: Tiago Gaspar <tiagogaspar8@gmail.com>
+Date: Fri, 21 Jan 2022 13:39:30 +0000
+Subject: [PATCH] libtool: Reduce the required version
+
+Current Openwrt's libtool verion is 2.4.2, yet, jool had the requirement
+set to 2.4.6 in source.
+Change that to Openwrt's version.
+
+Signed-off-by: Tiago Gaspar <tiagogaspar8@gmail.com>
+
+--- a/configure.ac
++++ b/configure.ac
+@@ -5,7 +5,7 @@ AC_PREREQ([2.68])
+ AC_INIT([Jool], [4.1.6], [jool@nic.mx])
+ AC_CONFIG_SRCDIR([src/common/xlat.h])
+ AM_INIT_AUTOMAKE([subdir-objects])
+-LT_PREREQ([2.4.6])
++LT_PREREQ([2.4.2])
+
+ # Checks for programs.
+ AC_PROG_CC