am_add_feature(f, fe_program_dump);
am_add_feature(f, fe_program_gnutar);
am_add_feature(f, fe_program_dump);
am_add_feature(f, fe_program_gnutar);
am_add_feature(f, fe_options_compress_fast);
am_add_feature(f, fe_options_compress_best);
am_add_feature(f, fe_options_compress_fast);
am_add_feature(f, fe_options_compress_best);