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Date: Mon, 16 Apr 2001 00:00:07 -0400
Message-Id: <200104160400.AAA06732@envy.delorie.com>
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From: DJ Delorie <dj AT delorie DOT com>
To: robert DOT collins AT itdomain DOT com DOT au
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In-reply-to: <01dc01c0c628$23c1f880$0200a8c0@lifelesswks>
	(robert DOT collins AT itdomain DOT com DOT au)
Subject: Re: next porting question for gcj
References: <01b301c0c621$063e4ae0$0200a8c0 AT lifelesswks> <200104160327 DOT XAA06356 AT envy DOT delorie DOT com> <01dc01c0c628$23c1f880$0200a8c0 AT lifelesswks>


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.