From owner-freebsd-current Wed Feb 17 15:15:31 1999 Delivered-To: freebsd-current@freebsd.org Received: from adelphi.physics.adelaide.edu.au (adelphi.physics.adelaide.edu.au [129.127.36.247]) by hub.freebsd.org (Postfix) with ESMTP id B715511294 for ; Wed, 17 Feb 1999 15:15:18 -0800 (PST) (envelope-from kkennawa@physics.adelaide.edu.au) Received: from bragg (bragg [129.127.36.34]) by adelphi.physics.adelaide.edu.au (8.8.8/8.8.8/UofA-1.5) with SMTP id JAA01333; Thu, 18 Feb 1999 09:45:15 +1030 (CST) Received: from localhost by bragg; (5.65/1.1.8.2/05Aug95-0227PM) id AA24202; Thu, 18 Feb 1999 09:45:13 +1030 Date: Thu, 18 Feb 1999 09:45:12 +1030 (CST) From: Kris Kennaway X-Sender: kkennawa@bragg To: "Daniel C. Sobral" Cc: Bob Bishop , Mike Smith , mi@aldan.algebra.com, current@FreeBSD.ORG Subject: Re: Buildworld fails on today 3.1-STABLE! In-Reply-To: <36CB3698.E28E4D95@newsguy.com> Message-Id: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thu, 18 Feb 1999, Daniel C. Sobral wrote: > Lucky you. -O2 *does* break world for many people. Eventually, it > might break your world too, and there is a great chance you'll first > spam -current before changing -O2 to -O and trying again. Or there > would, if we stopped hitting on this nail. :-) Odd..I've been running -O2 -mno-486 -pipe for at least a year now, without noticing any world problems (or weird behaviour from binaries) other than the commit-related breakage everyone else has seen due to legitimate bugs. What would cause some people to have problems with -O2 and others not? I also run my kernels -O3 because they work for me, but I understand the potential problems with this and drop it back if I ever have problems. This reminds me of something I need to benchmark a bit more: I was testing the optimization of egcs 1.1.1 and found that -O3 produced executables which were significantly slower than -O2, no matter what architecture settings I used. From memory, for -O2 binaries I was getting ~20% speed improvements on my simple test suite compiling with "-mpentium -march=pentium" compared to "-mno-486" on GCC 2.7.2.3 Kris > -- > Daniel C. Sobral (8-DCS) > dcs@newsguy.com > dcs@freebsd.org > > Well, as a computer geek, I have to believe in the binary universe. > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message > ----- (ASP) Microsoft Corporation (MSFT) announced today that the release of its productivity suite, Office 2000, will be delayed until the first quarter of 1901. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message