From owner-freebsd-current@FreeBSD.ORG  Sun Feb 10 19:00:52 2013
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by hub.freebsd.org (Postfix) with ESMTP id 027BAC70
 for <freebsd-current@freebsd.org>; Sun, 10 Feb 2013 19:00:52 +0000 (UTC)
 (envelope-from sgk@troutmask.apl.washington.edu)
Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu
 [128.95.76.21]) by mx1.freebsd.org (Postfix) with ESMTP id C17CED46
 for <freebsd-current@freebsd.org>; Sun, 10 Feb 2013 19:00:51 +0000 (UTC)
Received: from troutmask.apl.washington.edu (localhost.apl.washington.edu
 [127.0.0.1])
 by troutmask.apl.washington.edu (8.14.5/8.14.5) with ESMTP id r1AJ0miS077835; 
 Sun, 10 Feb 2013 11:00:48 -0800 (PST)
 (envelope-from sgk@troutmask.apl.washington.edu)
Received: (from sgk@localhost)
 by troutmask.apl.washington.edu (8.14.5/8.14.5/Submit) id r1AJ0mgd077834;
 Sun, 10 Feb 2013 11:00:48 -0800 (PST) (envelope-from sgk)
Date: Sun, 10 Feb 2013 11:00:48 -0800
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Anton Shterenlikht <mexas@bristol.ac.uk>
Subject: Re: 7+ days of dogfood
Message-ID: <20130210190048.GA77774@troutmask.apl.washington.edu>
References: <20130210164424.GA77092@troutmask.apl.washington.edu>
 <201302101851.r1AIpNWs055658@mech-cluster241.men.bris.ac.uk>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <201302101851.r1AIpNWs055658@mech-cluster241.men.bris.ac.uk>
User-Agent: Mutt/1.5.21 (2010-09-15)
Cc: freebsd-current@freebsd.org, bsam@passap.ru
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 10 Feb 2013 19:00:52 -0000

On Sun, Feb 10, 2013 at 06:51:23PM +0000, Anton Shterenlikht wrote:
> 	Date: Sun, 10 Feb 2013 08:44:24 -0800
> 	From: Steve Kargl <sgk@troutmask.apl.washington.edu>
> 	To: Boris Samorodov <bsam@passap.ru>
> 	Subject: Re: 7+ days of dogfood
> 
> 	> >   FFLAGS = -O2 -pipe -march=native -mtune=native
> 	> 
> 	> I don't like using "=" for FLAGS at make.conf...
> 	> 
> 	> >   FFLAGS+= -funroll-loops -ftree-vectorize
> 	> 
> 	> ... as well as defaults overriding.
> 	> 
> 
> 	FFLAGS are the options used while compiling Fortran.  Having
> 	spent years contributing to and testing gfortran, I am fairly
> 	comfortable with these options.
> 
> Do you recommend these FFLAGS settings to all
> users of gfortran (via lang/gcc4x)?
> 

Yes.

> For example, I use blas, lapack, slatec, atlas, etc.
> Should I use these FFLAGS too?

Without knowing what options you currently use, I cannot
make a concrete recommendation other than I've extensive
tested the above options with my own codes and the
Polyhedron testsuite.  Oh, I do recommend that one should
avoid -ffast-math (unless one really understands what it
actually does).

-- 
Steve