From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:60533 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752521AbZI1TZi (ORCPT ); Mon, 28 Sep 2009 15:25:38 -0400 Date: Mon, 28 Sep 2009 21:25:36 +0200 From: Pavel Machek Subject: Re: 32-rc1: "CROSS_COMPILE changed" message breaks compilation Message-ID: <20090928192536.GE28514@elf.ucw.cz> References: <20090928175605.GB28514@elf.ucw.cz> <20090928190841.GA12004@merkur.ravnborg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090928190841.GA12004@merkur.ravnborg.org> Sender: linux-kbuild-owner@vger.kernel.org List-ID: To: Sam Ravnborg Cc: kernel list , linux-kbuild@vger.kernel.org Hi! > > After update to 2.6.32-rc1, I'm getting > > > > "Makefile:197: *** CROSS_COMPILE changed from "ccache" to to "ccache ". Use "make mrproper" to fix it up. Stop. > > > > Note that the message has typo in it ("to to")... What is worse, the > > message triggers even when I try to run make mrproper. Ouch. > > The massage is changed in kbuild-fixes.git - but it addresses only ARCH= > > As a followup to your other mails: > The reason to use "make mrproper" is that when ARCH or CROSS_COMPILE changes > you have generally either decided to build for a new architecture or > you have changed the way you build the kernel (new toolchain or whatever). > So to clean up using "make mrproper" is perfectly justified. > > The target group that uses CROSS_COMPILE to enable ccache are using > CROSS_COMPILE is a way it is not designed for so they should expect that it > is not a perfect match. What is the recommended way to run ccache, then? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html