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Date: Sun, 11 Jan 2004 02:36:15 -0500
From: CBFalconer <cbfalconer AT yahoo DOT com>
Organization: Ched Research
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To: djgpp-workers AT delorie DOT com
Subject: Re: stdbool.h and complex.h
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Reply-To: djgpp-workers AT delorie DOT com

Eli Zaretskii wrote:
> From: CBFalconer <cbfalconer AT yahoo DOT com>
> >
> > the file uses _Bool to define bool, which does not exist.
> 
> No, it says
> 
>  #define bool _Bool
> 
> which, I think is perfectly okay.  What doesn't exist here? _Bool?
> It's built into GCC, AFAIK.

Not for K&R/C89/C90/C95.  _Bool does not exist for these.  The
declaration "_Bool boolthing;" should result in an undefined
error.  If the above #define has occurred, that error will result
from the innocuous "bool boolthing;", and attempts to redefine
bool with "#define bool int" will also result in confusing error
messages.

The more I think about it the more I think Esa Peuhas error
message from #including <stdbool.h> under non-standard C or C
standard < 1990 is a good idea.

We may be approaching this from different viewpoints. Mine is that
code should adhere to ISO standards, and that special efforts are
needed to deviate from that.  I consider GNU standards to be such
a deviation, and so run gcc with -ansi -pedantic by default.

-- 
Chuck F (cbfalconer AT yahoo DOT com) (cbfalconer AT worldnet DOT att DOT net)
   Available for consulting/temporary embedded and systems.
   <http://cbfalconer.home.att.net>  USE worldnet address!