Is there a HOST_BITS_PER_POINTER macro?

[Joern Rennecke]

> If I have the following in gcc's src code:
> 
>   char * foo;
>   [...]
>   printf(HOST_PTR_PRINTF, foo);
> 
> I get a warning from "-W -Wall" which complains about int format vs
> pointer argument.  Is there a way to define a macro in machmode.h
> which can cast the pointer to the appropriately sized integer type?
> I'd like to do the following 

Even if you had something like that (e.g. ptrdiff_t on systems that
have it), that would be little help: You'd have to make sure that the
integer type matches the format specifier.

I think the most portable you can get without autoconf help is to
use long consistently, i.e. cast to long and use a long format specifier.

Of course that will still fail when pointers are wider than long...