Useless pointer-to-int-cast warning?

[Jonathan Wakely]

On Fri, 17 Aug 2018 at 23:27, Vincent Lefevre wrote:
>
> What's the point of the pointer-to-int-cast warning, which is
> enabled by -Wall?
>
> I get this warning under 32-bit Linux when casting a pointer to
> uintmax_t. I use uintmax_t to make sure that the integer size is
> large enough. So, what's the problem?

sizeof(uintmax_t) != sizeof(void*).

Why not use uintptr_t instead?