set cmake policy for newer versions

CMakeLists.txt

 # RobotAPI
-
 cmake_minimum_required(VERSION 2.8)
+#if(NOT DEFINED CMAKE_SUPPRESS_DEVELOPER_WARNINGS)
+#     set(CMAKE_SUPPRESS_DEVELOPER_WARNINGS 1 CACHE INTERNAL "No dev warnings")
+#endif()
+
+if(POLICY CMP0043)
+    cmake_policy(SET CMP0043 OLD)
+endif()
 
 find_package("ArmarXCore" REQUIRED
     PATHS "$ENV{HOME}/armarx/Core/build"