Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932117Ab0FUTHH (ORCPT ); Mon, 21 Jun 2010 15:07:07 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:50106 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757268Ab0FUTHC (ORCPT ); Mon, 21 Jun 2010 15:07:02 -0400 Date: Mon, 21 Jun 2010 12:06:13 -0700 From: Andrew Morton To: Tiago Maluta Cc: linux-kernel@vger.kernel.org, Roland McGrath , Michal Marek , linux-kbuild@vger.kernel.org Subject: Re: [PATCH] Fix CONFIG_CROSS_COMPILE issue in .config Message-Id: <20100621120613.86cad1a4.akpm@linux-foundation.org> In-Reply-To: References: X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.9; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2308 Lines: 70 On Thu, 17 Jun 2010 12:50:52 +0000 Tiago Maluta wrote: > Linux has an recent option to define CROSS_COMPILE in menuconfig. > > Typically, one of the options when building for another target is > ('arm' is just an example): > > # make ARCH=arm CROSS_COMPILE=arm-cc O=../build > > If I omit CROSS_COMPILE and use the new way in .config: > CONFIG_CROSS_COMPILE="arm-cc" > > I got: > > cc1: error: unrecognized command line option "-mlittle-endian" > cc1: error: unrecognized command line option "-mabi=aapcs-linux" > cc1: error: unrecognized command line option "-mno-thumb-interwork" > /usr/src/linux/kernel/bounds.c:1: error: bad value (armv5t) for > -march= switch > /usr/src/linux/kernel/bounds.c:1: error: bad value (armv5t) for > -mtune= switch > make[2]: *** [kernel/bounds.s] Error 1 > make[1]: *** [prepare0] Error 2 > make: *** [sub-make] Error 2 > > Verbose output clearly says that I'm using the host compiler instead > cross compiler. > This patch fixed my problem: > > --- > __Makefile |______ 2 +- > __1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/Makefile b/Makefile > index d49d96c..5a6c7d5 100644 > --- a/Makefile > +++ b/Makefile > @@ -190,7 +190,7 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ > -e s/sun4u/sparc64/ \ > __export KBUILD_BUILDHOST := $(SUBARCH) > __ARCH____________________ ?= $(SUBARCH) > __CROSS_COMPILE__ ?= > -CROSS_COMPILE__ ?= $(CONFIG_CROSS_COMPILE:"%"=%) > +CROSS_COMPILE__ := $(shell grep CONFIG_CROSS_COMPILE .config | cut -d'"' -f2) > > __# Architecture as present in compile.h > __UTS_MACHINE______ := $(ARCH) > -- Perhaps the "%"=% thing isn't supported with your version of make(1). Which version are you using? Directly grepping .config probably isn't the right thing to do. Maybe `patsubst' can be used here. Administrivia: Your email client wordwraps the patches and replaces tabs with weird non-ascii characters. Please include a Signed-off-by: with patches, as described in Documentation/SubmittingPatches, thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/