message: COMP: Only set newer CMake Policy to NEW
  Only policies introduced after cmake_minimum_required version
  should be explicitely set to NEW.
diff: # ITKv5 or C++11.
  cmake_minimum_required(VERSION 3.9.5 FATAL_ERROR)
  -## Tell CMake to be quiet
  -cmake_policy(SET CMP0003 NEW)
  -if(POLICY CMP0054)
  - cmake_policy(SET CMP0054 NEW)
  -endif()
  -if(POLICY CMP0063)
  - cmake_policy(SET CMP0063 NEW)
  -endif()
  -cmake_policy (SET CMP0022 NEW)
  +## Only policies introduced after the cmake_minimum_required
  +## version need to explicitly be set to NEW.
  +## Refer to https://cmake.org/cmake/help/v3.11/manual/cmake-policies.7.html
  +set(CMAKE_POLICIES
  + CMP0070
  + CMP0071
  + CMP0072)
  +
  +foreach(p ${CMAKE_POLICIES})
  + if(POLICY ${p})
  + cmake_policy(SET ${p} NEW)
  + endif()
  +endforeach()
  project(RTK)
  