Date: Fri, 21 Jan 2005 01:46:31 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Mike Jakubik <mikej@rogers.com> Cc: freebsd-stable@freebsd.org Subject: Re: CFLAGS=-O2 -pipe problems in RELENG_5 ? Message-ID: <20050121094631.GA47975@xor.obsecurity.org> In-Reply-To: <52406.207.219.213.162.1106257499.squirrel@207.219.213.162> References: <3aaaa3a0501181530975fecf@mail.gmail.com> <XFMail.20050120085633.jdp@polstra.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>
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--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--
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