Tests/RunCMake/FASTBuild/Unity2.cmake - third_party/github.com/Kitware/CMake - Git at Google

 set(CMAKE_UNITY_BUILD ON)

 add_executable(main main.cpp some_source_file_1.cpp)
	set(CMAKE_UNITY_BUILD ON)

	add_executable(main main.cpp some_source_file_1.cpp)