Tests/RunCMake/execute_process/AnyCommandErrorVar.cmake - third_party/github.com/Kitware/CMake - Git at Google

 set(CMAKE_EXECUTE_PROCESS_COMMAND_ERROR_IS_FATAL ANY)
 execute_process(COMMAND ${CMAKE_COMMAND} -E true
   COMMAND ${CMAKE_COMMAND} -E false
   COMMAND ${CMAKE_COMMAND} -E false
   COMMAND ${CMAKE_COMMAND} -E true
 )
	set(CMAKE_EXECUTE_PROCESS_COMMAND_ERROR_IS_FATAL ANY)
	execute_process(COMMAND ${CMAKE_COMMAND} -E true
	COMMAND ${CMAKE_COMMAND} -E false
	COMMAND ${CMAKE_COMMAND} -E false
	COMMAND ${CMAKE_COMMAND} -E true
	)