message: Silence CMP0063 warning
diff: @@ -64,6 +64,9 @@ if(BUILD_SHARED_LIBS)
  set(LINK_TYPE "shared")
  set(CMAKE_CXX_VISIBILITY_PRESET hidden)
  set(CMAKE_VISIBILITY_INLINES_HIDDEN yes)
  + if(POLICY CMP0063)
  + cmake_policy(SET CMP0063 NEW)
  + endif()
  else()
  set(CAF_STATIC_BUILD yes)
  set(LINK_TYPE "static")
  