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From: edw@IUS1.CS.CMU.EDU.UUCP
Newsgroups: comp.lang.c
Subject: Re: How can I use #define to make something completely disappear?
Message-ID: <263@PT.CS.CMU.EDU>
Date: Sat, 31-Oct-87 09:54:54 EST
Article-I.D.: PT.263
Posted: Sat Oct 31 09:54:54 1987
Date-Received: Mon, 2-Nov-87 07:10:27 EST
References: <10083@brl-adm.ARPA>
Sender: netnews@PT.CS.CMU.EDU
Organization: Carnegie-Mellon University, CS/RI
Lines: 27

In article <10083@brl-adm.ARPA>, ultra!wayne@ames.arpa (Wayne Hathaway) writes:
  [A lot of stuff about how do I write a macro that allows the option to
   include or not to include code depending on whether a switch is defined]

  Heres what I do:

#ifdef DEBUG

#define if_debug(x)	x

#else

#define if_debug(x)

#endif


	if_debug( printf("XYZ entry, p1=%x, p2=%x\n", p1, p2) );


 BTW:  Are the macros __FILE__ and __LINE__ define for all C compilers??

-- 

					Eddie Wyatt

e-mail: edw@ius1.cs.cmu.edu