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From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: comp.sources.bugs
Subject: Re: Help needed for Logo on Unix
Message-ID: <6142@brl-smoke.ARPA>
Date: Tue, 21-Jul-87 13:58:43 EDT
Article-I.D.: brl-smok.6142
Posted: Tue Jul 21 13:58:43 1987
Date-Received: Thu, 23-Jul-87 04:09:10 EDT
References: <1740@encore.UUCP> <330@rabbit1.UUCP> <1649@sfsup.UUCP>
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 6

In article <1649@sfsup.UUCP> mpl@sfsup.UUCP (M.P.Lindner) writes:
>However, since YYDEBUG is never #defined, the preprocessor sees an undefined
>symbol name where it expects a numeric expression.

Which therefore evaluates as 0.
If someone's C preprocessor handles this differently, he should get it fixed.