Date: Tue, 21 Mar 2000 00:44:49 +0100 From: =?iso-8859-1?Q?Thomas_K=F6llmann?= <koellmann@gmx.net> To: David O'Brien <obrien@FreeBSD.ORG> Cc: freebsd-current@FreeBSD.ORG Subject: Re: gcc -Os optimisation broken (RELENG_4) Message-ID: <20000321004449.A310@home.net> In-Reply-To: <20000318110022.A60879@dragon.nuxi.com>; from obrien@FreeBSD.ORG on Sat, Mar 18, 2000 at 11:00:22AM -0800 References: <20000317125045.A15480@schumann.cx> <Pine.BSF.4.21.0003170922440.9372-100000@mammalia.sea> <20000318031845.A1816@home.net> <20000318110022.A60879@dragon.nuxi.com>
next in thread | previous in thread | raw e-mail | index | archive | help
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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20000321004449.A310>