From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.windriver.com ([147.11.1.11]) by linuxtogo.org with esmtp (Exim 4.72) (envelope-from ) id 1RjCWS-0001zg-Lc for openembedded-core@lists.openembedded.org; Fri, 06 Jan 2012 17:20:05 +0100 Received: from ALA-HCA.corp.ad.wrs.com (ala-hca [147.11.189.40]) by mail.windriver.com (8.14.3/8.14.3) with ESMTP id q06GCdPL017183 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Fri, 6 Jan 2012 08:12:40 -0800 (PST) Received: from Macintosh-5.local (172.25.36.228) by ALA-HCA.corp.ad.wrs.com (147.11.189.50) with Microsoft SMTP Server id 14.1.255.0; Fri, 6 Jan 2012 08:12:39 -0800 Message-ID: <4F071D76.3070803@windriver.com> Date: Fri, 6 Jan 2012 10:12:38 -0600 From: Mark Hatle Organization: Wind River Systems User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: References: <20120106100934.GA3879@jama.jama.net> <77ADD6E7-5632-4B1A-ABC3-6E4DAEEAE3B6@dominion.thruhere.net> <4F071A65.90708@windriver.com> In-Reply-To: Subject: Re: libs transition /usr/lib -> /lib questions 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: Fri, 06 Jan 2012 16:20:05 -0000 Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit On 1/6/12 10:04 AM, Chris Larson wrote: > On Fri, Jan 6, 2012 at 8:59 AM, Mark Hatle wrote: >> On 1/6/12 4:34 AM, Koen Kooi wrote: >>> >>> >>> Op 6 jan. 2012, om 11:09 heeft Martin Jansa het volgende geschreven: >>> >>>> FWIW today I've noticed that systemd is going other way around >>>> http://www.freedesktop.org/wiki/Software/systemd/separate-usr-is-broken >>> >>> >>> And http://fedoraproject.org/wiki/Features/UsrMove >>> >>> I guess it's time to publish my angstrom branch doing that after the >>> holidays :) >> >> >> I respectfully disagree with both of the above URLs. >> >> The root partition is still very useful as a "small" set of applications and >> libraries required for booting. >> >> Most systems these days contain a combined root and usr partition, which is >> fine. However, there are a lot of systems that I've worked on in the past >> and I expect in the future that, root being a small R/O system is necessary. >> >> initramfs can solve some problems, but introduces other issues. Many of the >> systems I've worked on simple don't have enough flash to be able to store >> the bootloader, kernel and an initramfs [as well as other system items >> required by the devices]. In this case a base rootfs makes the most sense. > > In my opinion, what's proposed in the two links is a good thing even > for embedded. Not that we'd use that structure necessarily, but > removing the usr vs non-usr separation for binaries and libs is a good > thing regardless. Putting /usr in the rootfs still would still work > fine, or you could drop usr entirely and move everything to / the way > micro does. I'd prefer if someone wants to flatten the filesystem that they move everything to '/'. This will still work in the case where we move libraries and binaries between '/' and '/usr' in the generic case. This would support both the traditional filesystem split case as well as a more modern single filesystem case. (We even have the ability, even though I doubt it's been tested, to change the base_bindir, base_sbindir, base_libdir to be /usr/bin, /usr/sbin, and /usr/lib* to automatically move the things into /usr if that is the system someone wants.) --Mark