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Mail Archives: cygwin-apps/2001/04/16/11:24:07

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Date: Mon, 16 Apr 2001 11:24:19 -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: <20010416112419.F15438@redhat.com>
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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> <20010416000640 DOT C28133 AT redhat DOT com>
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In-Reply-To: <20010416000640.C28133@redhat.com>; from cgf@redhat.com on Mon, Apr 16, 2001 at 12:06:40AM -0400

On Mon, Apr 16, 2001 at 12:06:40AM -0400, Christopher Faylor wrote:
>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.

Translation:

We did have to:

#define alloca __builtin_alloca

in several of the sources in the winsup directory.

I'm not sure what I was trying to convey by the double "at one point" above.

cgf

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