+ x86-fix-cc1-options-to-disable-fpie-when-compiling-with-config_cc_stackprotector=y.patch added to -mm tree

+ x86-fix-cc1-options-to-disable-fpie-when-compiling-with-config_cc_stackprotector=y.patch added to -mm tree

[akpm]

The patch titled
     x86: fix cc1 options to disable -fPIE when compiling with CONFIG_CC_STACKPROTECTOR=y
has been added to the -mm tree.  Its filename is
     x86-fix-cc1-options-to-disable-fpie-when-compiling-with-config_cc_stackprotector=y.patch

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------------------------------------------------------
Subject: x86: fix cc1 options to disable -fPIE when compiling with CONFIG_CC_STACKPROTECTOR=y
From: Anthony G. Basile <basile@opensource.dyc.edu>

The arch/x86/Makefile uses scripts/gcc-x86_$(BITS)-has-stack-protector.sh
to check if cc1 supports -fstack-protector.  When -fPIE is passed to cc1,
these scripts fail causing stack protection to be disabled even when it
is available.

This fix is similar to commit c47efe5548abbf ("kbuild: fix cc1 options
check to ensure we do not use -fPIC when compiling").

Reported-by: Kai Dietrich <mail@cleeus.de>
Signed-off-by: Magnus Granberg <zorry@gentoo.org>
Signed-off-by: Anthony G. Basile <basile@opensource.dyc.edu>
Cc: Jory A. Pratt <anarchy@gentoo.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/x86/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN arch/x86/Makefile~x86-fix-cc1-options-to-disable-fpie-when-compiling-with-config_cc_stackprotector=y arch/x86/Makefile
--- a/arch/x86/Makefile~x86-fix-cc1-options-to-disable-fpie-when-compiling-with-config_cc_stackprotector=y
+++ a/arch/x86/Makefile
@@ -74,7 +74,7 @@ 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) $(biarch)),y)
+        ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
                 stackp-y := -fstack-protector
                 KBUILD_CFLAGS += $(stackp-y)
         else
_

Patches currently in -mm which might be from basile@opensource.dyc.edu are

x86-fix-cc1-options-to-disable-fpie-when-compiling-with-config_cc_stackprotector=y.patch