[CMake] Cascading dependencies.

[Giulio Eulisse]

Ciao,
I'm trying to use cmake to build a project with many libraries, with  
lots of dependencies. For this reason I would like to do something  
that allows the following.
Given 3 libs A B C each one with its own dir and with

A depends on B
B depends on C

I want to be able to discover that A depends on C too and put it in  
the list of libraries that should be linked with A. I was trying to  
do it with LISTs but they don't seem to be available across  
directories...Any idea?

Ciao,
Giulio