Tests/RunCMake/IncludeWhatYouUse/CXX.cmake - third_party/github.com/Kitware/CMake - Git at Google

 enable_language(CXX)
 set(CMAKE_CXX_INCLUDE_WHAT_YOU_USE "$<1:${PSEUDO_IWYU}>" -some -args)
 add_executable(main main.cxx)
	enable_language(CXX)
	set(CMAKE_CXX_INCLUDE_WHAT_YOU_USE "$<1:${PSEUDO_IWYU}>" -some -args)
	add_executable(main main.cxx)