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x86, build: Disable -fPIE when compiling with CONFIG_CC_STACKPROTECTOR=y

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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 c47efe5548

Reported-by: Kai Dietrich <[email protected]>
Signed-off-by: Magnus Granberg <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Anthony G. Basile <[email protected]>
Cc: Andrew Morton <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
This commit is contained in:
[email protected] 2010-09-13 06:13:19 -04:00 • committed by H. Peter Anvin
commit 08c2b394b9
1 changed files with 1 additions and 1 deletions
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2
arch/x86/Makefile
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@ -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