Test the newly added gnome.genmarshal() argument
marshallers = gnome.genmarshal('marshaller',
sources : 'marshaller.list',
install_header : true,
-install_dir : get_option('includedir'))
+install_dir : get_option('includedir'),
+extra_args : ['-UG_ENABLE_DEBUG', '--prototypes'])
marshaller_c = marshallers[0]
marshaller_h = marshallers[1]
