Chris Quenelle wrote:
> Roland Mainz wrote:
> > Does Sun Studio 12 have a warning for statements like...
> > -- snip --
> > int pd;
> > char *ptr1,
> > *ptr2;
> > /* ... */
> > pd = ptr2-ptr1;
> > -- snip --
> > ... on 64bit targets ?
> >
> > I've spend today some hours to dig-out this kind of bug where a pointer
> > difference (32bit on 32bit SPARC and 64bit on 64bit SPARC, e.g. a
> > |ptrdiff_t|) is stored in an |int| (32bit integer) the loss of bits
> > trigged a malfunction...
> > ... somehow I was wondering why Sun Studio didn't warn about this.
>
> There's a chapter in the C user's guide about porting programs
> from 32-bits to 64-bits. It mentions a lint flag
>
> -errchk=longptr64 flag checks assignments of pointer
> expressions and long integer expressions to plain
> integers, even when explicit casts are used.
>
> http://docs.sun.com/app/docs/doc/819-5265/bjami?a=view
Is there any way to enable this specific warning for the compiler pass ?
Right now "lint" doesn't work for any of the AST/ksh93 sources properly
because it doesn't like stuff like the following:
-- snip --
int foo(int c);
int foo(register int c)
{
/* ... */
return x;
}
-- snip --
... that's valid for ISO-C99 but "lint" generates lots of noise on this
kind of things ... ;-(
----
Bye,
Roland
--
__ . . __
(o.\ \/ /.o) roland.mainz at nrubsig.org
\__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer
/O /==\ O\ TEL +49 641 3992797
(;O/ \/ \O;)
