From: Dave Jones <davej@redhat.com>
Date: Thu, 21 Apr 2011 21:28:13 +0000 (-0400)
Subject: kbuild: Disable -Wunused-but-set-variable for gcc 4.6.0
X-Git-Tag: v2.6.35.14~241
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d247496cd6a6a936cee3e1b1a28ea5139515e156;p=thirdparty%2Fkernel%2Fstable.git

kbuild: Disable -Wunused-but-set-variable for gcc 4.6.0

[ upstream commit af0e5d565d2fffcd97d1e2d89669d627cc04e8b8 ]

Disable the new -Wunused-but-set-variable that was added in gcc 4.6.0
It produces more false positives than useful warnings.

This can still be enabled using W=1

[AK: dropped W=1 support in backport]
Signed-off-by: Dave Jones <davej@redhat.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Tested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---

diff --git a/Makefile b/Makefile
index 5ade8188d821b..1d483a7282258 100644
--- a/Makefile
+++ b/Makefile
@@ -546,6 +546,9 @@ ifndef CONFIG_CC_STACKPROTECTOR
 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
 endif
 
+# This warning generated too much noise in a regular build.
+KBUILD_CFLAGS += $(call cc-option, -Wno-unused-but-set-variable)
+
 ifdef CONFIG_FRAME_POINTER
 KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
 else