Re: General gcc4.0 porting guide

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

Miloslav Trmac wrote:
> On Fri, Apr 29, 2005 at 01:56:04PM +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)?
>
> There are change descriptions on gcc.gnu.org.
>
>
> > For example, what is the "right" way to deal with this:
> >
> > int* foo;
> >
> > [...]
> > ((short int*)foo)++;  // gcc4 does not like this.
>
> foo = (short int *)(foo + 1);
> 	Mirek

Wrong (again) people please don't try to help unless you know how 
pointer arithmetic works in C. foo is a int *, so your assignment will 
give an invalid ptr type warning if not an error. also since you first 
increment foo and then cast it foo will be increased by 4 (sizeof(int) 
== 4) where the original code increased it by 2.

Regards,

Hans