Mailing-List: contact cygwin-apps-help AT cygwin DOT com; run by ezmlm
Sender: cygwin-apps-owner AT cygwin DOT com
List-Subscribe: <mailto:cygwin-apps-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin-apps/>
List-Post: <mailto:cygwin-apps AT cygwin DOT com>
List-Help: <mailto:cygwin-apps-help AT cygwin DOT com>, <http://sources.redhat.com/lists.html#faqs>
Mail-Followup-To: cygwin-apps AT cygwin DOT com
Delivered-To: mailing list cygwin-apps AT cygwin DOT com
Date: Thu, 21 Mar 2002 11:26:49 -0500
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin-apps AT cygwin DOT com, mingw-dvlpr <mingw-dvlpr AT lists DOT sourceforge DOT net>
Subject: Re: -fnative-structure revisited.
Message-ID: <20020321162649.GJ8437@redhat.com>
Reply-To: cygwin-apps AT cygwin DOT com
Mail-Followup-To: cygwin-apps AT cygwin DOT com,
	mingw-dvlpr <mingw-dvlpr AT lists DOT sourceforge DOT net>
References: <20020321073633 DOT 67411 DOT qmail AT web14506 DOT mail DOT yahoo DOT com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20020321073633.67411.qmail@web14506.mail.yahoo.com>
User-Agent: Mutt/1.3.23.1i

On Thu, Mar 21, 2002 at 06:36:33PM +1100, Danny Smith wrote:
>I just stumbled across this is gcc 3.1 changelog:
>
>2002-02-05  Alexandre Oliva  <aoliva AT redhat DOT com>
>
>	* target.h (struct gcc_target): Added ms_bitfield_layout_p.
>	* target-def.h (TARGET_MS_BITFIELD_LAYOUT_P): New.  Added to...
>	(TARGET_INITIALIZER): this.
>	* doc/tm.texi (TARGET_MS_BITFIELD_LAYOUT_P): Document.
>	(BITFIELD_NBYTES_LIMITED): Markup fix.
>	* tree.h (default_ms_bitfield_layout_p): Declare.
>	(record_layout_info): Added prev_field.
>	* tree.c (default_ms_bitfield_layout_p): New fn.
>	* c-decl.c (finish_struct): Disregard EMPTY_FIELD_BOUNDARY and
>	PCC_BITFIELD_TYPE_MATTERS for MS bit-field layout.
>	* stor-layout.c: Include target.h.
>	(start_record_layout): Initialize prev_field.
>	(place_field): Handle MS bit-field layout, and disregard
>	EMPTY_FIELD_BOUNDARY, BITFIELD_NBYTES_LIMITED and
>	PCC_BITFIELD_TYPE_MATTERS in this case.  Update prev_field.
>	* Makefile.in (stor-layout.o): Adjust dependencies.
>
>
>Essentially, it provides a hook to do what Donn Terry's -fnative-struct 
>patch did.  Has anyone tested this yet on cygwin or mingw?  AFAICT, the
>only target to use a non-default version of this hook is sh (see
>config/sh/sh.c) 

Does this mean that the layout defaults to MS automatically?

FWIW, I'm using a recent compiler from sourceware and it builds cygwin
just fine.

cgf