How is type **********p implemented?

[Shaun Case]

How do C compiler writers implement items like int ***************p, for
which the target processor has insufficient levels of hardware indirection?
I can think of a couple of different ways, but they seem to be pretty 
inefficient.  I'd really like an answer, this is literally keeping me
awake staring at the ceiling.  

Please email responses; I will summarize if there is sufficient interest.

Shaun

(boy, is that "i before e except after c" rule unreliable... or is it? :)