Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751281AbXBRRQJ (ORCPT ); Sun, 18 Feb 2007 12:16:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751451AbXBRRQJ (ORCPT ); Sun, 18 Feb 2007 12:16:09 -0500 Received: from scrub.xs4all.nl ([194.109.195.176]:59009 "EHLO scrub.xs4all.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751281AbXBRRQI (ORCPT ); Sun, 18 Feb 2007 12:16:08 -0500 Date: Sun, 18 Feb 2007 18:16:00 +0100 (CET) From: Roman Zippel X-X-Sender: roman@scrub.home To: Kumar Gala cc: Sam Ravnborg , Linux Kernel list Subject: Re: kbuild question In-Reply-To: <9AF725F4-FE65-4357-B7EB-CC03808C105D@kernel.crashing.org> Message-ID: References: <930B9C2E-DCE3-4E9E-AA6B-2C58E16736B2@kernel.crashing.org> <9AF725F4-FE65-4357-B7EB-CC03808C105D@kernel.crashing.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1474 Lines: 32 Hi, On Fri, 16 Feb 2007, Kumar Gala wrote: > > Could you please be more specific about the problem you're trying to > > solve, instead of how you're trying to solve it? > > A real example would help a lot to understand the actual problem. > > Sure, on powerpc for some of the embedded sub-architectures you can only > select a single board to build for. For a lot of people this is sufficient, > however we are moving towards a world where you can easily build in support > for multiple boards into a single kernel. > > I'd like to have it such that if I'm only building support for one board > (CONFIG_ONLY_HAVE_ONE, not going to call it that, but for this discussion its > sufficient), you get a choice menu from Kconfig enforcing the ability to only > select one board. However if !CONFIG_ONLY_HAVE_ONE than you can select > multiple boards to build into your kernel. > > if CONFIG_ONLY_HAVE_ONE is set we can optimize out the runtime checks that get > added for handling the multiple board case. On m68k we have the same problem, but what I'm what I'm considering is to add a new mode for choice groups - at least one must be selected and kconfig generates the extra information if only one is selected. bye, Roman - 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/