From owner-freebsd-current@FreeBSD.ORG Thu Jan 23 16:52:57 2014 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 784DDBC1 for ; Thu, 23 Jan 2014 16:52:57 +0000 (UTC) Received: from wonkity.com (wonkity.com [67.158.26.137]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 24CF61299 for ; Thu, 23 Jan 2014 16:52:56 +0000 (UTC) Received: from wonkity.com (localhost [127.0.0.1]) by wonkity.com (8.14.7/8.14.7) with ESMTP id s0NGqt3a078482; Thu, 23 Jan 2014 09:52:55 -0700 (MST) (envelope-from wblock@wonkity.com) Received: from localhost (wblock@localhost) by wonkity.com (8.14.7/8.14.7/Submit) with ESMTP id s0NGqts3078479; Thu, 23 Jan 2014 09:52:55 -0700 (MST) (envelope-from wblock@wonkity.com) Date: Thu, 23 Jan 2014 09:52:55 -0700 (MST) From: Warren Block To: Kevin Oberman Subject: Re: Lessons learned from source upgrade from FreeBSD i386 9.2 Stable to FreeBSD i386 10.0 Release. In-Reply-To: Message-ID: References: <52E09F68.8020804@UToledo.edu> <1390486224478-5879039.post@n5.nabble.com> User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (wonkity.com [127.0.0.1]); Thu, 23 Jan 2014 09:52:55 -0700 (MST) Cc: Thomas Hoffmann , Jakub Lach , freebsd-current X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Jan 2014 16:52:57 -0000 On Thu, 23 Jan 2014, Kevin Oberman wrote: > On Thu, Jan 23, 2014 at 7:47 AM, Thomas Hoffmann wrote: > On Thu, Jan 23, 2014 at 9:56 AM, Warren Block wrote: > > > > > > Using -DNOCLEAN with an existing /usr/obj can go even faster than ccache: > > less than two minutes for a buildworld on my frequently updated i5/SSD > > system, sometimes less than one minute. > > > Can you elaborate on this, please? I always clear my /usr/obj before > starting a buildworld, which takes 2 hours to run on my system. Are you > saying if I do "make -DNOCLEAN buildworld" I do not have to clear /usr/obj > first Yes. Removing /usr/obj is a faster way of doing 'make clean', mostly. > AND my buildworld will run faster Yes, because make will see that many/most files have already been built. > (AND with no downside)? Well... mostly. :) I noticed that after 10.0-RELEASE, uname on my system still said "PRERELEASE". That code had not been rebuilt because make did not see it as needing a rebuild. You can still delete /usr/obj and run a full buildworld from scratch every so often. I should give credit to bdrewery@ for reminding me about -DNOCLEAN when I was whining about ccache not working on 10.0. It turned out to be a better solution.