Date: Wed, 13 Sep 2006 14:21:35 +0400
From: Ruslan Ermilov <ru@FreeBSD.ORG>
To: freebsd-stable@FreeBSD.ORG
Subject: Re: optimization levels for 6-STABLE build{kernel,world}
Message-ID: <20060913102135.GB13946@rambler-co.ru>
In-Reply-To: <200609130926.k8D9Q0XZ063753@lurza.secnetix.de>
References: <4507CC9B.60704@sun-fish.com> <200609130926.k8D9Q0XZ063753@lurza.secnetix.de>
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--H+4ONPRPur6+Ovig Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Sep 13, 2006 at 11:26:00AM +0200, Oliver Fromme wrote: > Stefan Lambrev wrote: > > Oliver Fromme wrote: > > > The default CFLAGS are "-O2 -pipe -fno-strict-aliasing". > > > Anything above -O2 isn't supported, and using -O2 without > > > -fno-strict-aliasing also isn't supported (and will create > > > broken code for some programs). A common mistake is to > > > specify CFLAGS=3D"-O2 -pipe" and omit -fno-strict-aliasing. > > > That'll shot you in the foot sooner or later. > >=20 > > May be default flags have to be set here: > > /usr/src/share/examples/etc/make.conf ? > > I'm asking because in this file I read: > >=20 > > # CFLAGS controls the compiler settings used when compiling C code. > > # Note that optimization settings other than -O and -O2 are not recomm= ended > > # or supported for compiling the world or the kernel - please revert a= ny > > # nonstandard optimization settings to "-O" or -O2 before submitting b= ug > > # reports without patches to the developers. > > # > > #CFLAGS=3D -O -pipe > >=20 > > May be "-fno-strict-aliasing" have to be added here then ? >=20 > Yes, you are right. I think a clarification should > be added to the make.conf(5) manual page and to the > /usr/share/examples/etc/make.conf file. >=20 > Someone care to submit a PR ...? >=20 Should be fixed in src/share/examples/etc/make.conf,v 1.277. Cheers, --=20 Ruslan Ermilov ru@FreeBSD.org FreeBSD committer --H+4ONPRPur6+Ovig Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFFB9uvqRfpzJluFF4RAholAJ0QvR8eODNp49f1ndQQBrUrWe6JlgCggj8z 7j5fzEriQVqZNubb6Z/DQFk= =9C7R -----END PGP SIGNATURE----- --H+4ONPRPur6+Ovig--
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