linux-kernel - [PATCH] x86: detect stack protector for i386 builds on x86

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Message-ID: <20090829182718.10f566b1@leela>
Date:	Sat, 29 Aug 2009 18:27:18 +0200
From:	Michal Schmidt <mschmidt@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Tejun Heo <tj@...nel.org>, Jeremy Fitzhardinge <jeremy@...p.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: detect stack protector for i386 builds on x86_64

Stack protector support was not detected when building with ARCH=i386
on x86_64 systems:
arch/x86/Makefile:80: stack protector enabled but no compiler support

The "-m32" argument needs to be passed to the detection script.

Signed-off-by: Michal Schmidt <mschmidt@...hat.com>

--
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 1b68659..5e7db44 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -72,7 +72,7 @@ endif
 
 ifdef CONFIG_CC_STACKPROTECTOR
 	cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh
-        ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC)),y)
+        ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(biarch)),y)
                 stackp-y := -fstack-protector
                 stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += -fstack-protector-all
                 KBUILD_CFLAGS += $(stackp-y)
--
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