[CMake] Implicity CMAKE_CURRENT_BINARY_DIR include_directories

[Mike Arthur]

I'm sure I read some time about some option you could set in a CMake project 
that would always implicitly do 
include_directories(${CMAKE_CURRENT_BINARY_DIR}) in child CMakeLists.txt 
without the need to do so manually.

Searched the documentation to no avail. Did I just imagine this option or is 
it there somewhere?

Thanks!
-- 
Cheers,
Mike Arthur
http://mikearthur.co.uk/