diff -up ./CMakeLists.txt.automoc ./CMakeLists.txt
--- ./CMakeLists.txt.automoc	2020-02-23 13:14:37.253626733 -0500
+++ ./CMakeLists.txt	2020-02-23 13:14:52.629672833 -0500
@@ -3,6 +3,7 @@ cmake_minimum_required(VERSION 2.8.6 FAT
 if(COMMAND CMAKE_POLICY)
   CMAKE_POLICY(SET CMP0003 NEW)
   CMAKE_POLICY(SET CMP0004 NEW)
+  CMAKE_POLICY(SET CMP0100 NEW)
 endif(COMMAND CMAKE_POLICY)
 
 project (Gazebo)