[CMake] multiple cmake files in one directory

[Bill Hoffman]

th.tom at gmx.de wrote:
> hm, right - this would solve my problem, but sadly writing everything in one CMakeLists.txt file was not a clever idea, as the projects should be build independently.
> 
> Another solution I had (someone posted that) is creating a subdirectory for every project and place the specific CMakeLists.txt file there. However, this would change the CMAKE_SOURCE_DIR to the projects subdirectory; what is kind of nasty.
> 
> Any ideas to change the root back?
> 

You should be able to use add_subdirectory for this.  It supports out of 
source source.

add_subdirectory can be given a full path to a source directory.   So, 
you should be able to "share" source dirs between projects.  They will 
get re-compiled for each project, but it should work.

-Bill