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[PATCH] x86: Drop cc-options call for all options supported in gcc 3.2+

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The kernel only supports gcc 3.2+ now so it doesn't make sense
anymore to explicitely check for options this compiler version
already has.

This actually fixes a bug. The -mprefered-stack-boundary check
never worked because gcc rightly complains

  CC      arch/i386/kernel/asm-offsets.s
cc1: -mpreferred-stack-boundary=2 is not between 4 and 12

We just never saw the error because of cc-options.
I changed it to 4 to actually work.

Tested by compiling i386 and x86-64 defconfig with gcc 3.2.

Should speed up the build time a tiny bit and improve
stack usage on i386 slightly.

Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Andi Kleen 2007-05-02 19:27:06 +02:00 committed by Andi Kleen
parent 2a12652c03
commit c8fdd24725
2 changed files with 2 additions and 2 deletions
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2
Makefile
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@ -491,7 +491,7 @@ endif
include $(srctree)/arch/$(ARCH)/Makefile
ifdef CONFIG_FRAME_POINTER
CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
else
CFLAGS += -fomit-frame-pointer
endif

2
arch/i386/Makefile
View File

@ -34,7 +34,7 @@ CHECKFLAGS += -D__i386__
CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return
# prevent gcc from keeping the stack 16 byte aligned
CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
CFLAGS += -mpreferred-stack-boundary=4
# CPU-specific tuning. Anything which can be shared with UML should go here.
include $(srctree)/arch/i386/Makefile.cpu