From mboxrd@z Thu Jan 1 00:00:00 1970 From: Seth Forshee Subject: Re: [PATCH] apple-gmux: Correctly depend on apple_bl for building Date: Thu, 28 Jun 2012 08:48:06 -0500 Message-ID: <20120628134806.GB15308@thinkpad-t410> References: <1340879796-30262-1-git-send-email-arun.raghavan@collabora.co.uk> <20120628132058.GA15308@thinkpad-t410> <1340889815.4994.4.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1340889815.4994.4.camel@localhost> Sender: linux-kernel-owner@vger.kernel.org To: Arun Raghavan Cc: Matthew Garrett , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: platform-driver-x86.vger.kernel.org On Thu, Jun 28, 2012 at 06:53:35PM +0530, Arun Raghavan wrote: > On Thu, 2012-06-28 at 08:20 -0500, Seth Forshee wrote: > > On Thu, Jun 28, 2012 at 04:06:36PM +0530, Arun Raghavan wrote: > > > apple_bl_register/unregister() are unconditionally used now, so we need > > > to make sure that apple_bl is selected appropriately (built-in/module) > > > if apple-gmux is being built. > > > > apple_bl.h provides stubs for these functions when apple_bl is not > > built, so this shouldn't be necessary. Are you encoutering a situation > > that causes build problems? > > Yes, I am. With CONFIG_BACKLIGHT_APPLE=m and CONFIG_APPLE_GMUX=y, I see > the following error: > > LD init/built-in.o > drivers/built-in.o: In function `gmux_probe': > apple-gmux.c:(.devinit.text+0xa769): undefined reference to `apple_bl_unregister' > drivers/built-in.o: In function `gmux_remove': > apple-gmux.c:(.devexit.text+0x46d): undefined reference to `apple_bl_register' Yuck. In that case I don't think your patch probably goes far enough to fix your situation. As far as I know select isn't recursive, i.e. it won't select the dependencies of the thing you select.