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Cc: Jack Howarth <howarth@bromo.med.uc.edu>, Uros Bizjak <ubizjak@gmail.com>,        "H.J. Lu" <hjl.tools@gmail.com>, GCC Patches <gcc-patches@gcc.gnu.org>,        Richard Guenther <rguenther@suse.de>, Jakub Jelinek <jakub@redhat.com>,        Mark Mitchell <mark@codesourcery.com>, jh@suse.cz,        Andi Kleen <andi@firstfloor.org>, Andrew Haley <aph@redhat.com>,        David Daney <ddaney@caviumnetworks.com>,        Xinliang David Li <davidxl@google.com>,        Chris Lattner <clattner@apple.com>,        Gerald Pfeifer <gerald@pfeifer.com>
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From: IainS <developer@sandoe-acoustics.co.uk>
To: Richard Henderson <rth@redhat.com>
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Subject: Re: PATCH: Turn on -fomit-frame-pointer by default for 32bit	Linux/x86
Date: Thu, 12 Aug 2010 17:58:00 -0000
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On 12 Aug 2010, at 18:42, Richard Henderson wrote:

> On 08/12/2010 10:39 AM, Jack Howarth wrote:
>> So it sounds like the same issue on linux. Would the debugging
>> impairment be any different on Mac OS X than on Linux (at least for
>> the FSF gdb)? Jack
>
> With dwarf2 debugging there is no impairment.  This is mostly a
> reference to stabs debugging, which does require the frame pointer.

well, we default to dwarf2 darwin >=  9
and I recommend it for darwin 8

So I'd think we can just issue an advice to use --enable-frame-pointer  
for darwin <= 7, for the very small number of people who would be  
doing this.

Iain