From 05fb9f7fbb270638f8ff4990fe68037e1a52a85f Mon Sep 17 00:00:00 2001
From: MarcoFalke <falke.marco@gmail.com>
Date: Wed, 8 May 2019 14:28:57 -0400
Subject: [PATCH] build with -fstack-reuse=none

Github-Pull: #15983
Rebased-From: faf38bc056e523485520f98f3f725c583a3b89bf
---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configure.ac b/configure.ac
index 9cc01a402..844961708 100644
--- a/configure.ac
+++ b/configure.ac
@@ -693,6 +693,10 @@ if test x$TARGET_OS != xwindows; then
   AX_CHECK_COMPILE_FLAG([-fPIC],[PIC_FLAGS="-fPIC"])
 fi
 
+# All versions of gcc that we commonly use for building are subject to bug
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348. To work around that, set
+# -fstack-reuse=none for all gcc builds. (Only gcc understands this flag)
+AX_CHECK_COMPILE_FLAG([-fstack-reuse=none],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-reuse=none"])
 if test x$use_hardening != xno; then
   use_hardening=yes
   AX_CHECK_COMPILE_FLAG([-Wstack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"])