From owner-freebsd-arm@FreeBSD.ORG  Sun Mar  4 09:39:25 2012
Return-Path: <owner-freebsd-arm@FreeBSD.ORG>
Delivered-To: arm@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id A884C106566B
	for <arm@freebsd.org>; Sun,  4 Mar 2012 09:39:25 +0000 (UTC)
	(envelope-from andrew@fubar.geek.nz)
Received: from mail.bluewatersys.com (mail.bluewatersys.com [202.124.120.130])
	by mx1.freebsd.org (Postfix) with ESMTP id 20C738FC1C
	for <arm@freebsd.org>; Sun,  4 Mar 2012 09:39:24 +0000 (UTC)
Received: (qmail 25643 invoked by uid 89); 4 Mar 2012 09:15:54 -0000
Received: from unknown (HELO localhost) (aturner@203.118.177.218)
	by 0 with ESMTPA; 4 Mar 2012 09:15:54 -0000
Date: Sun, 4 Mar 2012 22:12:19 +1300
From: Andrew Turner <andrew@fubar.geek.nz>
To: Tim Kientzle <tim@kientzle.com>
Message-ID: <20120304221219.434706ca@fubar.geek.nz>
In-Reply-To: <EE178EB5-3469-405A-9938-9ADE3B771F02@kientzle.com>
References: <23CB6C35-9450-40BA-9FA3-37C44B328CA8@freebsd.org>
	<CABt+j0mB4w==h_SQ4YyDM24_wGOjcdZDK9T1N3DqjSkap0VkQw@mail.gmail.com>
	<E8A24EBE-967D-44F8-A884-3207B3C6F0FE@bsdimp.com>
	<8042D895-3B3D-431E-ADCC-A150BDC838ED@kientzle.com>
	<890D6B89-8031-496C-A5A2-A2836369F765@FreeBSD.org>
	<A68B207A-2754-4222-A30B-FDBD143A03D5@kientzle.com>
	<88338819-70CF-4BA7-92AE-95864F159FF4@FreeBSD.org>
	<3206B98F-E9F1-4758-9741-AF29FE7CCBFA@kientzle.com>
	<EE178EB5-3469-405A-9938-9ADE3B771F02@kientzle.com>
X-Mailer: Claws Mail 3.7.9 (GTK+ 2.24.5; i386-portbld-freebsd8.0)
X-Pirate: Arrrr
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Cc: "arm@freebsd.org" <arm@freebsd.org>
Subject: Re: native toolchain for freestanding apps
X-BeenThere: freebsd-arm@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Porting FreeBSD to the StrongARM Processor <freebsd-arm.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arm>,
	<mailto:freebsd-arm-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arm>
List-Post: <mailto:freebsd-arm@freebsd.org>
List-Help: <mailto:freebsd-arm-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arm>,
	<mailto:freebsd-arm-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 04 Mar 2012 09:39:25 -0000

On Sun, 4 Mar 2012 00:40:06 -0800
Tim Kientzle <tim@kientzle.com> wrote:

> On Mar 3, 2012, at 7:23 PM, Tim Kientzle wrote:
> > On Mar 3, 2012, at 5:29 PM, Stanislav Sedov wrote:
> >> On Mar 3, 2012, at 11:03 AM, Tim Kientzle <tim@kientzle.com> wrote:
> >>> 
> >>> 2) Missing div/mod functions in ARM libgcc.
> >>> 
> >> 
> >> Hmm, maybe they are disabled because libc supplies them?
> > 
> > If I copy the various div/mod object files from libc.a into
> > libgcc.a, then u-boot compiles ...
> > 
> > Is there any compelling reason they can't be in both places?
Have you tried to build a FreeBSD binary when both lots of symbols are
provided? If it links properly then I can't think of any reason we
couldn't provide both. The compiler-rt versions are hidden so shouldn't
be exposed.

> Here's the patch for libcompiler_rt (aka libgcc.a) that just includes
> an extra copy of the numeric routines (duplicating the ones in libc).
> 
> With this, I'm now able to build u-boot (and other freestanding
> programs) using the FreeBSD xdev tools on ARM.
> 
> Any comments?
I have done the same with the ARM EABI support as compiler-rt provides
the required __aeabi_* symbols. This will mean with it's support the
libc versions are unneeded.

Andrew