CMake/Tests/RunCMake/execute_process/AnyCommandErrorVar.cmake

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
)