From patchwork Tue Dec 22 00:24:06 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 69210 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.2) with ESMTP id nBM0NCS2025020 for ; Tue, 22 Dec 2009 00:25:04 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751117AbZLVAZB (ORCPT ); Mon, 21 Dec 2009 19:25:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752149AbZLVAZB (ORCPT ); Mon, 21 Dec 2009 19:25:01 -0500 Received: from smtp1.linux-foundation.org ([140.211.169.13]:40889 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751117AbZLVAZA (ORCPT ); Mon, 21 Dec 2009 19:25:00 -0500 Received: from imap1.linux-foundation.org (imap1.linux-foundation.org [140.211.169.55]) by smtp1.linux-foundation.org (8.14.2/8.13.5/Debian-3ubuntu1.1) with ESMTP id nBM0O73m005592 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 21 Dec 2009 16:24:08 -0800 Received: from localhost.localdomain (localhost [127.0.0.1]) by imap1.linux-foundation.org (8.13.5.20060308/8.13.5/Debian-3ubuntu1.1) with ESMTP id nBM0O6AQ005096; Mon, 21 Dec 2009 16:24:06 -0800 Message-Id: <200912220024.nBM0O6AQ005096@imap1.linux-foundation.org> Subject: [patch 1/1] kconfig CROSS_COMPILE option To: mmarek@suse.cz Cc: linux-kbuild@vger.kernel.org, akpm@linux-foundation.org, roland@redhat.com, anibal@debian.org, rostedt@goodmis.org, sam@ravnborg.org From: akpm@linux-foundation.org Date: Mon, 21 Dec 2009 16:24:06 -0800 MIME-Version: 1.0 X-Spam-Status: No, hits=-3.515 required=5 tests=AWL, BAYES_00, OSDL_HEADER_SUBJECT_BRACKETED X-Spam-Checker-Version: SpamAssassin 3.2.4-osdl_revision__1.47__ X-MIMEDefang-Filter: lf$Revision: 1.188 $ X-Scanned-By: MIMEDefang 2.63 on 140.211.169.13 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org diff -puN Makefile~kconfig-cross_compile-option Makefile --- a/Makefile~kconfig-cross_compile-option +++ a/Makefile @@ -184,11 +184,14 @@ SUBARCH := $(shell uname -m | sed -e s/i # CROSS_COMPILE can be set on the command line # make CROSS_COMPILE=ia64-linux- # Alternatively CROSS_COMPILE can be set in the environment. +# A third alternative is to store a setting in .config so that plain +# "make" in the configured kernel build directory always uses that. # Default value for CROSS_COMPILE is not to prefix executables # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile export KBUILD_BUILDHOST := $(SUBARCH) ARCH ?= $(SUBARCH) CROSS_COMPILE ?= +CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) # Architecture as present in compile.h UTS_MACHINE := $(ARCH) diff -puN init/Kconfig~kconfig-cross_compile-option init/Kconfig --- a/init/Kconfig~kconfig-cross_compile-option +++ a/init/Kconfig @@ -76,6 +76,14 @@ config INIT_ENV_ARG_LIMIT variables passed to init from the kernel command line. +config CROSS_COMPILE + string "Cross-compiler tool prefix" + help + Same as running 'make CROSS_COMPILE=prefix-' but stored for + default make runs in this kernel build directory. You don't + need to set this unless you want the configured kernel build + directory to select the cross-compiler automatically. + config LOCALVERSION string "Local version - append to kernel release" help