From owner-freebsd-current Mon Mar 20 16:13:38 2000 Delivered-To: freebsd-current@freebsd.org Received: from relay.ipf.net (relay.gigabell.net [195.211.211.23]) by hub.freebsd.org (Postfix) with SMTP id 813F537BA60 for ; Mon, 20 Mar 2000 16:13:31 -0800 (PST) (envelope-from koellmann@gmx.net) Received: (qmail 37291 invoked from network); 21 Mar 2000 00:13:29 -0000 Received: from dialin-194-29-33-7.hamburg.gigabell.net (HELO server.home.net) (194.29.33.7) by relay.gigabell.net with SMTP; 21 Mar 2000 00:13:29 -0000 Received: (qmail 58388 invoked from network); 20 Mar 2000 23:45:14 -0000 Received: from desk.home.net (192.168.1.2) by server.home.net with SMTP; 20 Mar 2000 23:45:14 -0000 Received: by desk.home.net (Postfix, from userid 1002) id E1DA5934E4; Tue, 21 Mar 2000 00:44:49 +0100 (CET) Date: Tue, 21 Mar 2000 00:44:49 +0100 From: =?iso-8859-1?Q?Thomas_K=F6llmann?= To: David O'Brien Cc: freebsd-current@FreeBSD.ORG Subject: Re: gcc -Os optimisation broken (RELENG_4) Message-ID: <20000321004449.A310@home.net> References: <20000317125045.A15480@schumann.cx> <20000318031845.A1816@home.net> <20000318110022.A60879@dragon.nuxi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Mailer: Mutt 1.0.1i In-Reply-To: <20000318110022.A60879@dragon.nuxi.com>; from obrien@FreeBSD.ORG on Sat, Mar 18, 2000 at 11:00:22AM -0800 X-Operating-System: FreeBSD 4.0-STABLE X-PGP-KeyID: 8C45AC01 X-PGP-Fingerprint: C5 F0 DE B2 AD 70 B9 45 B0 F9 0C D3 58 19 48 C8 Organization: =?iso-8859-1?Q?Hamburger_Gesellschaft_mit_beschr=E4nkter_Hoffnung?= Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG David O'Brien wrote/schrieb (Saturday, March 18, 2000): | On Sat, Mar 18, 2000 at 03:18:45AM +0100, Thomas Köllmann wrote: | > | Perhaps this is a bit off topic, but can the pentium optimisations be | > | used for AMD K6 processors? | > | > I did a `make world' yesterday with | > CFLAGS= -O2 -pipe -march=pentium | > COPTFLAGS= -O2 -pipe -march=pentium | ..snip.. | > If it doesn't I'll probably try `-03 -pipe -march=pentium' come next | | What are people hoping to get by doing this? Are you actually doing a | scientific performance evaluation between the various optimization | options??? This is just playing, the machine I was talking about has it's backups in order and can afford downtime; I mentioned that already, and I was only answering somebody's question. | Are are people just being macho, and thinking they are | getting all this non-existent performance increase? You _are_ feeling strong about this, aren't you? :-) | "-O" is the only globally safe optimization on FreeBSD. -O2, etc.. | causes various problems for various people in various ports, and parts of | /usr/src/. If people are using these options just for fun, that is fine, Yes, just for fun, David, just for fun. | BUT if you experience *any* problems with compiling using -O2, etc.. | don't bug this list -- go bug the GCC people. Are they a bunch of machos themselves? :-) Thanks for your point of view. Gruß - Thomas -- Walking to the car, she takes his hand and puts it, for a moment, lightly between her moving legs. Roger's heart grows erect, and comes. That's really how it feels. -- Thomas Pynchon, Gravity's Rainbow # PGP key sent on request / PGP key auf Wunsch per e-mail To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message