From owner-freebsd-hackers Wed Jun 3 17:08:54 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id RAA07701 for freebsd-hackers-outgoing; Wed, 3 Jun 1998 17:08:54 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from dingo.cdrom.com (dingo.cdrom.com [204.216.28.145]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id RAA07427 for ; Wed, 3 Jun 1998 17:07:50 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost [127.0.0.1]) by dingo.cdrom.com (8.8.8/8.8.5) with ESMTP id QAA01867; Wed, 3 Jun 1998 16:01:10 -0700 (PDT) Message-Id: <199806032301.QAA01867@dingo.cdrom.com> X-Mailer: exmh version 2.0zeta 7/24/97 To: Donn Miller cc: James Raynard , hackers@FreeBSD.ORG Subject: Re: Recompiling sources with "-O2 -m486 -pipe" In-reply-to: Your message of "Wed, 03 Jun 1998 19:03:51 -0000." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 03 Jun 1998 16:01:10 -0700 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > About the -m486 option -- I use -m486 -O3 -pipe all the time; does it slow > down the execution somewhat? I noticed the Mozilla sources defined > -mno-486. Do you know if compiling with -mno-486 gives better results > than -m486 as far as speed, etc.? I figured that -m486 generated 486 > instructions, which would make a pentium run faster. There are no 486 instructions to generate, and anything over -O runs the risk of exposing bugs in the gcc optimiser it seems. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message