[CMake] include_directories(...) versus set_directory_properties(PROPERTIES INCLUDE_DIRECTORIES ...)

[Stephen Kelly]

David Cole wrote:

> That's just the quick brain dump version. If necessary, I can actually
> look at old commits, or the current code to try to refresh my memory.
> 

I think that's needed. Can you do that research into the commits and 
discussion?

Thanks,

Steve.