Re: General gcc4.0 porting guide

[Hans de Goede <j w r degoede hhs nl>]

Nils Philippsen wrote:
> On Fri, 2005-04-29 at 13:56 +0200, Ralf Ertzinger wrote:
>
> > Hi.
> >
> > Is there a general document showing common pitfalls when compiling a
> > package with gcc4.0 (and how to resolve them)?
> >
> > For example, what is the "right" way to deal with this:
> >
> > int* foo;
> >
> > [...]
> > ((short int*)foo)++;  // gcc4 does not like this.
>
>
> 1) Fix the code in question (why is there a cast to short) ;-)
>
> 2) perhaps:
>
>   *foo = ((short int) (*foo)) + 1;

No, the original code moved the ptr your code instead changes the 
contents of what is pointed to.

Correct would be:
foo = (int *)((short int *)foo + 1);

Regards,

Hans