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Date: Tue, 26 Feb 2002 09:08:29 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
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To: JT Williams <jeffw AT darwin DOT sfbr DOT org>
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In-reply-to: <20020225142533.A15413@kendall.sfbr.org> (message from JT
	Williams on Mon, 25 Feb 2002 14:25:33 -0600)
Subject: Re: ANNOUNCE: DJGPP port of GNU bison 1.33 uploaded
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> Date: Mon, 25 Feb 2002 14:25:33 -0600
> From: JT Williams <jeffw AT darwin DOT sfbr DOT org>
> 
> The YYDEBUG change is Posix-mandated: the bison 1.33 NEWS file reports:
> 
> * When the generated parser lacks debugging code, YYDEBUG is now 0
>   (as POSIX requires) instead of being undefined.

So the conclusion is that this is indeed an incompatible change,
and programs that use "#ifdef YYDEBUG" will have to change that to 
"#if YYDEBUG" instead.