frr: Fix configure check for libreadline

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-networking/recipes-protocols/frr/frr/0001-configure-Check-for-readline-function-instead-of-mai.patch

@@ -0,0 +1,30 @@
+From 9399d58c13257849179d3c2b3698a2b43bc1b2a0 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Thu, 1 Sep 2022 10:39:23 -0700
+Subject: [PATCH] configure: Check for readline() function instead of main
+
+main is not a function found in libreadline, its better to check for a
+function thats provided by it.
+
+Upstream-Status: Submitted [https://github.com/FRRouting/frr/pull/11893]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ configure.ac | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index b7e17d356..8c1fab0ea 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -1372,7 +1372,7 @@ case "${enable_vtysh}" in
+   AC_DEFINE([VTYSH], [1], [VTY shell])
+ 
+   prev_libs="$LIBS"
+-  AC_CHECK_LIB([readline], [main], [
++  AC_CHECK_LIB([readline], [readline], [
+     LIBREADLINE="-lreadline"
+   ], [
+     dnl readline failed - it might be incorrectly linked and missing its
+-- 
+2.37.3
+

meta-networking/recipes-protocols/frr/frr_8.2.2.bb

@@ -10,6 +10,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263 \
                     file://COPYING-LGPLv2.1;md5=4fbd65380cdd255951079008b364516c"
 
 SRC_URI = "git://github.com/FRRouting/frr.git;protocol=https;branch=stable/8.2 \
+           file://0001-configure-Check-for-readline-function-instead-of-mai.patch \
            file://frr.pam \
 	      "