Mailing-List:	contact cygwin-apps-help AT sourceware DOT cygnus DOT com; run by ezmlm
Sender:	cygwin-apps-owner AT sourceware DOT cygnus DOT com
List-Subscribe:	<mailto:cygwin-apps-subscribe AT sources DOT redhat DOT com>
List-Archive:	<http://sources.redhat.com/ml/cygwin-apps/>
List-Post:	<mailto:cygwin-apps AT sources DOT redhat DOT com>
List-Help:	<mailto:cygwin-apps-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/lists.html#faqs>
Delivered-To:	mailing list cygwin-apps AT sources DOT redhat DOT com
Date:	Mon, 16 Apr 2001 00:06:40 -0400
From:	Christopher Faylor <cgf AT redhat DOT com>
To:	cygwin-apps AT cygwin DOT com
Subject:	Re: next porting question for gcj
Message-ID:	<20010416000640.C28133@redhat.com>
Reply-To:	cygwin-apps AT cygwin DOT com
Mail-Followup-To:	cygwin-apps AT cygwin DOT com
References:	<01b301c0c621$063e4ae0$0200a8c0 AT lifelesswks> <200104160327 DOT XAA06356 AT envy DOT delorie DOT com> <01dc01c0c628$23c1f880$0200a8c0 AT lifelesswks> <200104160400 DOT AAA06732 AT envy DOT delorie DOT com>
Mime-Version:	1.0
User-Agent:	Mutt/1.3.11i
In-Reply-To:	<200104160400.AAA06732@envy.delorie.com>; from dj@delorie.com on Mon, Apr 16, 2001 at 12:00:07AM -0400

On Mon, Apr 16, 2001 at 12:00:07AM -0400, DJ Delorie wrote:
>A simple test will show you:
>
>main()
>{
>  char *b = alloca(500);
>  return b[3];
>}
>
>Compile with gcc, and you'll see that alloca is implemented directly,
>without function calls.
>
>__builtin_alloca is the internal way gcc implements it; either works
>just fine but __builtin_alloca is more immune to being #define'd to
>something else.  It's not specific to Cygwin.

We did have to:

#define alloca __builtin_alloca

at one point in winsup/... at one point, though.

cgf

- Raw text -