[CMake] 2 questions :)

[Matt McCormick]

> 
> add_subdirectory (/mylib/src /mylib/bin)

I'm surprised this works, but for good practice, I would leave out the first 
slash since it usually used to indicate an absolute path, i.e. mylib/src instead 
of /mylib/src.

> 
> Everything works like a charm, but when I add a dependency
> 
> add_dependencies (myproject mylib)
> 
> It doesn't work, saying mylib is an unknown target. However, the same 
> things works for other projects which libraries are not imported. Am I 
> doing something wrong ? Or dependency on imported target is not 
> supported ? I know I could simplify my life with target_link_libraries, 
> but I'm trying to build a solid framework which would scale correctly if 
> mylib is converted to a full cmake project one day.

CMake automagically defines the usual dependencies for you, so in most cases you 
don't have to worry about using add_dependencies.  Just use 
target_link_libraries.
> 
> Also, if I'm trying to make a project with both executable in it, with 
> something like:
> 
> add_subdirectory (/myexe1/src /myexe1/bin)
> add_subdirectory (/myexe2/srr /myexe2/bin)
> 
> since both project try to add the same lib, I get an error saying the 
> binary directory is already used (when doing exe2). Is there any way 
> around this problem or do I have to handle this situation manually ?
> 

Not sure what you mean here.  add_library should be called once.