[CMake] when are variables inherited?

[Sylvain Benner]

> hah! I see what happened. Obviously, the variable needs to be set
> _before_ using ADD_SUBDIRECTORY (oops). For some reason I had it after.
> Thanks anyway.
>
> Javier
>
>   
Yes, ADD_SUBDIRECTORY processes immediatly the subdirectory.
Note that inherited variables actually are new variables, so if you 
modify an inherited variable in a subdirectory, the parent variable will 
not be modified in the topdirectory.

--Sylvain