From adbb26bc0a49d083472d24762255ff48bd001e45 Mon Sep 17 00:00:00 2001
From: Vincent Bernat <vincent@bernat.ch>
Date: Thu, 10 Jan 2019 22:36:55 +0100
Subject: [PATCH] build: enable increased reliability of stack overflow
 detection

See https://developers.redhat.com/blog/2018/03/21/compiler-and-linker-flags-gcc/
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index 589cd969..ef4ad69c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -108,6 +108,7 @@ if test x"$hardening" != x"no"; then
   AX_CFLAGS_GCC_OPTION([-fstack-protector-all], [LLDP_CFLAGS])
   AX_CFLAGS_GCC_OPTION([-fstack-protector-strong], [LLDP_CFLAGS])
   AX_CFLAGS_GCC_OPTION([-fstack-protector-strong], [LLDP_CFLAGS])
+  AX_CFLAGS_GCC_OPTION([-fstack-clash-protection], [LLDP_CFLAGS])
   AX_CFLAGS_GCC_OPTION([-D_FORTIFY_SOURCE=2], [LLDP_CPPFLAGS])
 fi
 if test x"$pie" = x"yes"; then
-- 
2.39.2