From owner-freebsd-stable@FreeBSD.ORG Fri Jan 21 09:46:42 2005 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id ED92A16A4CE for ; Fri, 21 Jan 2005 09:46:42 +0000 (GMT) Received: from obsecurity.dyndns.org (CPE0050040655c8-CM00111ae02aac.cpe.net.cable.rogers.com [69.199.47.57]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9020943D49 for ; Fri, 21 Jan 2005 09:46:39 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id AC752511C1; Fri, 21 Jan 2005 01:46:31 -0800 (PST) Date: Fri, 21 Jan 2005 01:46:31 -0800 From: Kris Kennaway To: Mike Jakubik Message-ID: <20050121094631.GA47975@xor.obsecurity.org> References: <3aaaa3a0501181530975fecf@mail.gmail.com> <3aaaa3a050120105459f7d015@mail.gmail.com> <3aaaa3a050120111777ada357@mail.gmail.com> <1106256780.582.5.camel@zappa.Chelsea-Ct.Org> <52406.207.219.213.162.1106257499.squirrel@207.219.213.162> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="X1bOJ3K7DJ5YkBrT" Content-Disposition: inline In-Reply-To: <52406.207.219.213.162.1106257499.squirrel@207.219.213.162> User-Agent: Mutt/1.4.2.1i cc: freebsd-stable@freebsd.org Subject: Re: CFLAGS=-O2 -pipe problems in RELENG_5 ? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 21 Jan 2005 09:46:43 -0000 --X1bOJ3K7DJ5YkBrT Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Jan 20, 2005 at 04:44:59PM -0500, Mike Jakubik wrote: > Paul Mather said: >=20 > > On Thu, 2005-01-20 at 19:17 +0000, Chris wrote: > >> what does -fno-strict-alias do? I cannot find it in man gcc > > > > It is a truncation of "-fno-strict-aliasing". The flag does not appear > > to be described in the gcc man page, but is documented in the gcc info > > page (search for "-fstrict-aliasing"). To quote the info page, > > -fstrict-aliasing "allows the compiler to assume the strictest aliasing > > rules applicable to the language being compiled. ..." >=20 > Wouldn't we want strict aliasing then? It's desirable, but a lot of ports contain bugs that are exposed by this option (the base system used to as well, but these are believed to all be fixed). Kris --X1bOJ3K7DJ5YkBrT Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQFB8M93Wry0BWjoQKURAuaMAJ9Q1W69OTjjEtejPQxDVq1K7KnNrACgwClK aTiJpOuOTS1yY8Jfz3cIcOc= =EWlu -----END PGP SIGNATURE----- --X1bOJ3K7DJ5YkBrT--