Modules/Platform/Linux-Intel-C.cmake - third_party/github.com/Kitware/CMake - Git at Google

 include(Platform/Linux-Intel)
 __linux_compiler_intel(C)
 set(CMAKE_INCLUDE_SYSTEM_FLAG_C "-isystem ")
	include(Platform/Linux-Intel)
	__linux_compiler_intel(C)
	set(CMAKE_INCLUDE_SYSTEM_FLAG_C "-isystem ")