Use policy instead

CMakeLists.txt

@@ -30,6 +30,12 @@ if(HUNTER_ENABLED)
     include(${CMAKE_CURRENT_LIST_DIR}/package/hunter/HunterInit.cmake)
 endif()
 
+# If CMAKE_AUTOMOC is set, all uses of corrade_add_resource() would otherwise
+# complain on 3.10 that AUTOMOC is not processing GENERATED files
+if(POLICY CMP0071)
+    cmake_policy(SET CMP0071 NEW)
+endif()
+
 project(Magnum CXX)
 
 if(HUNTER_ENABLED)

src/Magnum/Shaders/CMakeLists.txt

@@ -69,10 +69,6 @@ if(BUILD_STATIC)
     set_property(SOURCE ${MagnumShaders_RCS} APPEND PROPERTY COMPILE_DEFINITIONS
         "CORRADE_AUTOMATIC_INITIALIZER=CORRADE_NOOP"
         "CORRADE_AUTOMATIC_FINALIZER=CORRADE_NOOP")
-    # Avoid warning when using AUTOGEN for Qt
-    if(NOT (${CMAKE_VERSION} VERSION_LESS "3.8.0"))
-        set_property(SOURCE ${MagnumShaders_RCS} PROPERTY SKIP_AUTOGEN ON)
-    endif()
 endif()
 target_include_directories(MagnumShadersObjects PUBLIC
     $<TARGET_PROPERTY:Magnum,INTERFACE_INCLUDE_DIRECTORIES>

src/Magnum/TextureTools/CMakeLists.txt

@@ -41,10 +41,6 @@ if(TARGET_GL)
             COMPILE_DEFINITIONS
                 "CORRADE_AUTOMATIC_INITIALIZER=CORRADE_NOOP"
                 "CORRADE_AUTOMATIC_FINALIZER=CORRADE_NOOP")
-        # Avoid warning when using AUTOGEN for Qt
-        if(NOT (${CMAKE_VERSION} VERSION_LESS "3.8.0"))
-            set_property(SOURCE ${MagnumTextureTools_RCS} PROPERTY SKIP_AUTOGEN ON)
-        endif()
     endif()
 
     list(APPEND MagnumTextureTools_SRCS