From: Andi Kleen <ak@suse.de>
Date: Wed, 2 May 2007 17:27:06 +0000 (+0200)
Subject: [PATCH] x86: Drop cc-options call for all options supported in gcc 3.2+
X-Git-Tag: v2.6.22-rc1~1011^2~202
X-Git-Url: http://git.rot13.org/?a=commitdiff_plain;h=c8fdd247255a3a027cd9f66dcf93e6847d1d2f85;p=powerpc.git

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

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>
---

diff --git a/Makefile b/Makefile
index d970cb1654..387526b69d 100644
--- a/Makefile
+++ b/Makefile
@@ -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
diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index bd28f9f9b4..6dc5e5d90f 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -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