commit 22cf2cb345b16f9783165e9cfc80ed9a97a11ca0
Author: João Valverde <joao.valverde@tecnico.ulisboa.pt>
Date:   Mon Mar 29 01:32:20 2021 +0100

    CMake: Set CMake Policy CMP0071 to NEW
    
    This policy says: "Since version 3.10, CMake processes regular and GENERATED
    source files in AUTOMOC and AUTOUIC. In earlier CMake versions, only regular
    source files were processed. GENERATED source files were ignored silently."
    
    We are currently running AUTOMOC/RCC/UIC on too many files unnecessarily and
    that should be improved. CMake 3.20 introduced some changes related with this
    that broke the build (issue #17314) and need further investigation.
    
    Meanwhile setting this policy to NEW shouldn't break anything and silences
    some noisy CMake warnings.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 99ce96ba3c..fc2d491783 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,6 +24,9 @@ endif()
 if(POLICY CMP0069)
 	cmake_policy(SET CMP0069 NEW)
 endif()
+if(POLICY CMP0071)
+	cmake_policy(SET CMP0071 NEW)
+endif()
 if(POLICY CMP0074)
 	cmake_policy(SET CMP0074 NEW)
 endif()