🚀 go-pugleaf

Why does gcc complain when casting a short to a pointer?
What rule is being violated here?  Casting an int to a pointer
succeeds without warning (on a Sparc).


$ cat ptr-cast.c
/* ptr-cast.c - test casting short to pointer with gcc */

int func()
{
    unsigned int i = 0;
    unsigned short s = 0;
    void *p, *q;
    
    p = (void*)i;
    q = (void*)s;

    return p<q;
}

$ gcc -c ptr-cast.c
ptr-cast.c: In function `func':
ptr-cast.c:10: warning: cast to pointer from integer of different size
$ gcc -v
Reading specs from /usr/local/lib/gcc-lib/sparc-sun-sunos4.1.3/2.7.1/specs
gcc version 2.7.1


What am I supposed to do about this warning?  I didn't see any
discussion of it in the manual.

It is not clear how I can write code that stores a short in a pointer
type and makes gcc happy.  Since pointers are of different sizes on
different architectures, there is no type I can cast my short to so
that I'm sure it is the right size and that subsequently casting it to
a pointer won't produce a warning.

 < Stephen