Allow cmake dependencies to be interfaces

In some cases (see bincrafters/community#1181), the dependencies can be library interfaces. As CMake's get_target_property is not tolerant about what properties can be extracted on different library types, it is necessary to make a distinction between interface libraries and plain libraries

build/cmake/config.cmake

@@ -33,7 +33,12 @@ macro(wx_get_dependencies var lib)
         get_target_property(deps wx${lib} LINK_LIBRARIES)
         foreach(dep IN LISTS deps)
             if(TARGET ${dep})
-                get_target_property(dep_name ${dep} OUTPUT_NAME)
+                get_target_property(dep_type ${dep} TYPE)
+                if (dep_type STREQUAL "INTERFACE_LIBRARY")
+                    get_target_property(dep_name ${dep} INTERFACE_OUTPUT_NAME)
+                else()
+                    get_target_property(dep_name ${dep} OUTPUT_NAME)
+                endif()
                 set(dep_name "-l${dep_name}")
             else()
                 get_filename_component(dep_name ${dep} NAME)