linux-kernel - Re: linux-next: build warnings after merge of the kspp tree

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Date:	Wed, 22 Jun 2016 10:39:30 -0700
From:	Kees Cook <keescook@...gle.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Linux-Next <linux-next@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Emese Revfy <re.emese@...il.com>
Subject: Re: linux-next: build warnings after merge of the kspp tree

On Tue, Jun 21, 2016 at 10:14 PM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> Hi Kees,
>
> After merging the kspp tree, today's linux-next build (i386 defconfig)
> produced these warning:
>
> x86_64-linux-gcc: warning: '-mcpu=' is deprecated; use '-mtune=' or '-march=' instead
>
> (over 2000 of these)
>
> Introduced (maybe) by commit
>
>   e2135c84d5d2 ("kbuild: no gcc-plugins during cc-option tests")

This is fixed now in the kspp tree; sorry for the noise. If anyone
wants to manual fix this up for i386 builds:

index 2da7f8eed1d7..f585766989c2 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -109,7 +109,7 @@ as-instr = $(call try-run,\
        printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler
-o "$$TMP" -,$(2),$(3))

 # Do not attempt to build with gcc plugins during cc-option tests.
-CC_OPTION_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS))
+CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS))

 # cc-option
 # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)


-Kees

-- 
Kees Cook
Chrome OS & Brillo Security