From owner-freebsd-current@FreeBSD.ORG  Sun Sep 16 02:08:02 2007
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 0826816A417
	for <freebsd-current@freebsd.org>; Sun, 16 Sep 2007 02:08:02 +0000 (UTC)
	(envelope-from sgk@troutmask.apl.washington.edu)
Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu
	[128.208.78.105])
	by mx1.freebsd.org (Postfix) with ESMTP id CF59D13C461
	for <freebsd-current@freebsd.org>; Sun, 16 Sep 2007 02:08:01 +0000 (UTC)
	(envelope-from sgk@troutmask.apl.washington.edu)
Received: from troutmask.apl.washington.edu (localhost.apl.washington.edu
	[127.0.0.1])
	by troutmask.apl.washington.edu (8.14.1/8.14.1) with ESMTP id
	l8G27UmZ006625; Sat, 15 Sep 2007 19:07:30 -0700 (PDT)
	(envelope-from sgk@troutmask.apl.washington.edu)
Received: (from sgk@localhost)
	by troutmask.apl.washington.edu (8.14.1/8.14.1/Submit) id
	l8G27QJO006624; Sat, 15 Sep 2007 19:07:26 -0700 (PDT)
	(envelope-from sgk)
Date: Sat, 15 Sep 2007 19:07:26 -0700
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: "Thomas D. Dean" <tomdean@speakeasy.org>
Message-ID: <20070916020726.GB6447@troutmask.apl.washington.edu>
References: <200709152159.l8FLxfha008167@dv6000.tddhome>
	<20070915222422.GA4487@troutmask.apl.washington.edu>
	<200709152255.l8FMtMSD008381@dv6000.tddhome>
	<20070915231526.GA4788@troutmask.apl.washington.edu>
	<200709152339.l8FNdVK1008558@dv6000.tddhome>
	<20070915235852.GB4998@troutmask.apl.washington.edu>
	<200709160102.l8G12bAl001481@dv6000.tddhome>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200709160102.l8G12bAl001481@dv6000.tddhome>
User-Agent: Mutt/1.4.2.3i
Cc: freebsd-current@freebsd.org
Subject: Re: Compiler Problems?
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/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, 16 Sep 2007 02:08:02 -0000

On Sat, Sep 15, 2007 at 06:02:37PM -0700, Thomas D. Dean wrote:
> (gdb) bt
> #0  0x082c6050 in slamc3_ ()
> #1  0x082c6b08 in slamc1_ ()
> #2  0x082c6375 in slamc2_ ()
> #3  0x082c6bb9 in slamch_ ()

Ugh.  Make sure that slamch.f (which is part of BLAS/LAPACK)
is compiled without optimization.  This routine tries to 
use clever tricks to determine machine parameters (e.g.,
EPSILON), and it can get stuck in infinite loops with
optimization.  This is known issue with LAPACK.  See 
http://www.netlib.org/lapack/faq.html#1.25

-- 
Steve