[CMake] environment variables and visual studio

[Sylvain Benner]

>
>
> No, I can't. The reason I don't generate them is that they have to be
> portable since they are shipped to customers as a part of an SDK, and as
> I understand it the project files CMake generates are not
> portable/movable (due to absolute paths, etc).
>   

You can generate relative paths with the following switch 
CMAKE_USE_RELATIVE_PATHS.
We managed to have portable generated projects that we can ship. After 
the CMake pass it should be no difference between a generated project 
and a manually constructed project. In fact CMake assure that the 
projects are consistent since it's an automated process, I encourage you 
to use CMake for all your projects.

--Sylvain