Tests/RunCMake/Emscripten/C-enable.cmake - third_party/github.com/Kitware/CMake - Git at Google

 enable_language(C)
 foreach(var IN ITEMS
     CMAKE_C_BYTE_ORDER
     CMAKE_C_COMPILER_ARCHITECTURE_ID
     CMAKE_C_SIZEOF_DATA_PTR
   )
   message(STATUS "${var}='${${var}}'")
 endforeach()
	enable_language(C)
	foreach(var IN ITEMS
	CMAKE_C_BYTE_ORDER
	CMAKE_C_COMPILER_ARCHITECTURE_ID
	CMAKE_C_SIZEOF_DATA_PTR
	)
	message(STATUS "${var}='${${var}}'")
	endforeach()