[CMake] Basic Tutorial Help

[Adam A Smith]

Has anybody written a basic tutorial on how to get started with CMake? 
I've been looking through the docs, and 
http://www.cmake.org/cmake/help/examples.html is not clear at all.  It's 
written all in the passive voice, which makes it very hard to understand 
what's done automatically, and what the user has to do.  The way it reads, 
it seems I just have to will it to work, and it all happens magically.

For example, do I have to write CMakeLists.txt files, or is it done 
automatically?  I've seen indications that both might be true.  And the 
tutorial web page is no help at all--it just says that these files "are 
created."  Created by what or whom?

Ideally, somebody might have already created a "first do this, then do 
that" sort of tutorial, in the imperative?

Thanks.  Very frustrated right now, and I'm hoping that someone can help.

Adam