[CMake] Building shared library from collection?

[John Brydon]

Hi folks,

first post here as just delving into the world of cmake.

My first question is about the structure of my project. It is like so:

<Project Folder>
             '-> <Module A>
             '-> <Module B>
             '-> <Module C>

 From reading the CMake book it appears I've got 3 options for building.
1) Single makefile at top that lists all the sources with their 
subdirectories.
2) Have each subdirectory build a library that can then be linked at 
then end.
3) Mixture of 1 and 2.

I choose 3 as I wish to have each module as a library and then link the 
3 libraries together to make up the project.
Firstly, does this seem feasible i.e. is my understanding of the book 
correct? Secondly, I managed to build each of
the libraries separately but I am unsure of the syntax of how to link 
them together to create the 'super' library.

Any help or pointers in the right direction would be great.

Cheers,

John.