Date:	Fri, 10 May 1996 12:55:08 -0400 (EDT)
From:	Ulrich Guenther <ugunther AT diamond DOT tufts DOT edu>
Message-Id:	<199605101655.MAA09265@diamond.tufts.edu>
To:	kagel AT dg1 DOT bloomberg DOT com
CC:	djgpp AT delorie DOT com
In-reply-to:	<9605101338.AA06148@quasar.bloomberg.com > (kagel@quasar.bloomberg.com)
Subject:	Re: DJGPP warning: ... locatopn of previous def

Thank you.
DJGPP defines PI, EMX (which had used before) does not.

Ulriich Guenther



   From: kagel AT quasar DOT bloomberg DOT com
   Errors-To: postmaster AT ns2 DOT bloomberg DOT com
   Date: Fri, 10 May 1996 09:38:47 -0400
   Cc: djgpp AT delorie DOT com
   Reply-To: kagel AT dg1 DOT bloomberg DOT com

      From: ugunther AT diamond DOT tufts DOT edu (Ulrich Guenther)
      Date: 9 May 1996 16:33:36 GMT

      invoking djgpp2 (just installed) I get the error

      "c:/djgpp/include/math.h:57: warning: this is the location of the 
   look at this line(57):      ^^ 
      previous definition"

      The prg runs anyway.

   The compiler is warning you that a function you have prototyped in your code is
   defined differently in math.h.  The message immediately preceding this one is
   the one being referenced.  This message also indicates that the definition in
   your code is at line 57.  This usually happens when porting UNIX code to DJGPP
   as most UNIX compilers maintain the older definitions of functions or do not
   define all functions.  UNIX programmers get used to adding the definitions
   in-code.  Either way the UNIX compilers will pass them without notice but they
   can conflict with the stricter definitions in the DJGPP headers.  Best to not
   define functions which are already defined in the headers.  If you need reverse
   compatible code put the define in a #if defined(__unix__) or the safer 
   #if defined( __DGUX__ ) or even #if !defined( __GNUC__ ).

   -- 
   Art S. Kagel, kagel AT quasar DOT bloomberg DOT com

   A proverb is no proverb to you 'till life has illustrated it.  -- John Keats

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