From 5172d7b26624fd2219e6a68eee6237c899f8610a Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Sat, 15 Dec 2007 19:37:21 +0000
Subject: Autodetect whether or not we need to be using -fno-stack-protector.

---
 src/Makefile.housekeeping | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/Makefile.housekeeping')

diff --git a/src/Makefile.housekeeping b/src/Makefile.housekeeping
index 3694402b..1e97ee62 100644
--- a/src/Makefile.housekeeping
+++ b/src/Makefile.housekeeping
@@ -102,6 +102,14 @@ CFLAGS	+= $(OLDGAS)
 oldgas :
 	@$(ECHO) $(oldgas)
 
+# Some widespread patched versions of gcc include -fstack-protector by
+# default, even when -ffreestanding is specified.  We therefore need
+# to disable -fstack-protector if the compiler supports it.
+#
+SP_TEST = $(CC) -fno-stack-protector -x c -E - < /dev/null >/dev/null 2>&1
+SP_FLAGS := $(shell $(SP_TEST) && $(ECHO) '-fno-stack-protector')
+CFLAGS	+= $(SP_FLAGS)
+
 # compiler.h is needed for our linking and debugging system
 #
 CFLAGS	+= -include compiler.h
-- 
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