For PR automake/312: * lib/am/libtool.am (clean-libtool): Use LTRMS. * automake.in (handle_single_transform_list): When processing a libtool object, clean the ordinary object and register the directory. (libtool_clean_directories): New global. (initialize_per_input): Initialize it. (generate_makefile): Call handle_libtool later. (handle_libtool): Handle libtool_clean_directories. * tests/subobj9.test: New file. * tests/Makefile.am (TESTS): Added subobj9.test.