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Date:	Tue, 25 Jun 2013 16:26:59 -0700 (PDT)
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Subject:	Re: General Protection Fault error is intermittent
From:	"K.J.Williams" <lordwilliams1972 AT gmail DOT com>
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On Tuesday, June 25, 2013 8:45:35 AM UTC-7, rug DOT  DOT  DOT  AT gmail DOT com wrote:
> Hi,
> 
> 
> 
> On Tuesday, June 25, 2013 3:24:59 AM UTC-5, K.J.Williams wrote:
> 
> > 
> 
> > BTW, I found another bug with DJGPP 
> 
> >
> 
> > if you have program that just uses :
> 
> > 
> 
> > #include<stdio.h>
> 
> > #include<string.h> 
> 
> > 
> 
> > ...and you use a function from ctype.h - as I did with isspace(),
> 
> > without including ctype.h in your includes ... DJGPP/GCC will NOT
> 
> > complain about it and will still compile it.
> 
> 
> 
> Originally, way way back, C didn't have a preprocessor at all. I
> 
> think, without explicit prototypes, C assumes every function returns
> 
> an int. C nowadays only has simple file inclusion, thus it's not true
> 
> modules, hence instead of the compiler checking for consistency, it's
> 
> left to the linker to resolve. But for varargs functions (e.g. printf)
> 
> you always have to include the header for prototype as it's allowed
> 
> to change the ABI.
> 

Well I have noticed this in some .h files (which I can read in RHIDE), they sometimes #include other .h(s) before the defintions. I thought , maybe string.h or stdio.h has a ctype.h included which is allowing me to get away from actually using #include<ctype.h> in my code that I was needing isspace(); for. But I immediately added that #include to my source code to prevent future problems  

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