From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga11.intel.com ([192.55.52.93]) by linuxtogo.org with esmtp (Exim 4.72) (envelope-from ) id 1SjYcD-0005m9-3O for openembedded-core@lists.openembedded.org; Tue, 26 Jun 2012 18:27:45 +0200 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 26 Jun 2012 09:16:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="185206075" Received: from unknown (HELO envy.home) ([10.255.12.246]) by fmsmga002.fm.intel.com with ESMTP; 26 Jun 2012 09:16:50 -0700 Message-ID: <4FE9E01E.3060802@linux.intel.com> Date: Tue, 26 Jun 2012 09:15:26 -0700 From: Darren Hart User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 MIME-Version: 1.0 To: Patches and discussions about the oe-core layer References: <4FE8F542.2070304@linux.intel.com> In-Reply-To: X-Enigmail-Version: 1.4.2 Subject: Re: kernel: building target-arch scripts/* to include in kernel-headers package X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.11 Precedence: list Reply-To: Patches and discussions about the oe-core layer List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Jun 2012 16:27:45 -0000 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On 06/25/2012 10:53 PM, Khem Raj wrote: > On Mon, Jun 25, 2012 at 10:19 PM, Khem Raj wrote: >> On Mon, Jun 25, 2012 at 4:33 PM, Darren Hart wrote: >>> I'm working on a patch series to provide a kernel-headers package which >>> allows for the compilation of Linux kernel modules on the target. I >>> currently have something working, but it requires that I first build the >>> scripts/* binaries on the target, prior to trying to build a module. >>> >>> # cd /usr/src/kernel-headers >>> # make scripts >>> >>> Then I can build modules: >>> >>> # cd /home/root/hello-mod/files >>> # export KERNEL_SRC=/usr/src/kernel-headers >>> # make >>> >>> And test: >>> >>> # insmod hello.ko >>> # rmmod hello.ko >>> # dmesg | tail -n2 >>> Hello World! >>> Goodbye Cruel World! >>> >>> I would like to package the target-arch scripts binaries with the >>> kernel-headers package, but I'm not sure how to go about building both >>> the native and the target binaries as part of the kernel building >>> process. Does it make sense to build these as part of the do_install() >>> task after I've moved the files from the linux recipe's workdir and >>> removed the host-arch binaries from scripts? >>> >> >> the hostprogs there are a bit hairy. you could set HOSTCC to point to >> cross compiler and build scripts dir in some O=foo after copying >> .config into it but the problem would be that build system expects the >> hosttools in build tree at exact same location >> e.g. fixdep would be needed even to build other hosttools e.g. >> recordmcount etc. and thats where you have to patch kbuild such that >> it could reference another fixdep tool which then will be built for >> the host you are compiling kernel on. > > > another option is to add a completely new makefile to build > the necessary tools the way we want them and not use make scripts target at all While tempting, it sounds like a fragile mechanism with the potential for maintenance issues. -- Darren Hart Intel Open Source Technology Center Yocto Project - Linux Kernel