Re: [Sdcc-user] Void Pointer Arithmetic Warnings

[Dave M. <mc...@ne...>]

  Hmm, and you didn't unsubscribe from this mailing list?  Interesting!

           -Dave

-- 
Dave McGuire
Port Charlotte, FL


On Oct 12, 2010, at 10:39 AM, "Gabbay, Dan" <dg...@cu...> wrote:

> I was going through similar kind of problems and eventually decided to
> spend around $2000 and buy a descent compiler...
> Good-luck
> Dan
> 
> 
> 
> -----Original Message-----
> From: George Oikonomou [mailto:G.O...@lb...] 
> Sent: October 12, 2010 10:29 AM
> To: sdc...@li...
> Subject: [Sdcc-user] Void Pointer Arithmetic Warnings
> 
> Hi all.
> 
> I'm trying to port some pre-existing code to sdcc for 8051. In some
> files, 
> the original code uses gcc-style void * arithmetic, similar to this:
> 
> static unsigned short foo[15];
> 
> void funct() {
>  void * ptr;
> 
>  ptr = foo;  /* ptr is X:0xe01a */
> 
>  /* do something */
> 
>  ptr = (void *)foo + 1;  /* ptr is still X:0xe01a */
> }
> 
> Please correct me if I'm wrong but I would expect this code to cause
> warning 
> 178: size of void is zero. Correct?
> sdcc doesn't produce a warning, while gcc -Wpointer-arith does.
> 
> Needless to say, the code does not achieve what the developer originally
> 
> intended, which makes things hard for me to debug. So my question here
> is, 
> is there a way to turn on a warning for this scenario?
> 
> Thanks for any tips all.
> Regards
> geo 
> 
> 
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