linux-kernel - [PATCH 87/91] kbuild: Disable -Wunused-but-set-variable for gcc 4.6.0

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Message-Id: <20120205220953.174999716@pcw.home.local>
Date:	Sun, 05 Feb 2012 23:11:16 +0100
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Dave Jones <davej@...hat.com>, Sam Ravnborg <sam@...nborg.org>,
	Michal Marek <mmarek@...e.cz>,
	Greg KH <gregkh@...uxfoundation.org>
Subject: [PATCH 87/91] kbuild: Disable -Wunused-but-set-variable for gcc 4.6.0

2.6.27-longterm review patch.  If anyone has any objections, please let us know.

------------------

commit af0e5d565d2fffcd97d1e2d89669d627cc04e8b8 upstream.

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
[gregkh - No it can not for 2.6.32, but we don't care]

Signed-off-by: Dave Jones <davej@...hat.com>
Acked-by: Sam Ravnborg <sam@...nborg.org>
Tested-by: Sam Ravnborg <sam@...nborg.org>
Signed-off-by: Michal Marek <mmarek@...e.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 Makefile |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

Index: longterm-2.6.27/Makefile
===================================================================
--- longterm-2.6.27.orig/Makefile	2012-02-05 22:34:32.306915729 +0100
+++ longterm-2.6.27/Makefile	2012-02-05 22:34:47.271916824 +0100
@@ -530,6 +530,9 @@
 # Arch Makefiles may override this setting
 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
 
+# 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


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