if [[ $BOOST_SELECT_LIBS == "n" ]]; then
  return 0
fi &&

case $THIS_SUB_DEPENDS in
   PROGRAM_OPTIONS) list_find "$BOOST_LIBS_MZ" program_options  ;;
    GRAPH_PARALLEL) list_find "$BOOST_LIBS_AL" graph_parallel   ;;
     SERIALIZATION) list_find "$BOOST_LIBS_MZ" serialization    ;;
        FILESYSTEM) list_find "$BOOST_LIBS_AL" filesystem       ;;
         EXCEPTION) list_find "$BOOST_LIBS_AL" exception        ;;
         DATE_TIME) list_find "$BOOST_LIBS_AL" date_time        ;;
         IOSTREAMS) list_find "$BOOST_LIBS_AL" iostreams        ;;
            RANDOM) list_find "$BOOST_LIBS_MZ" random           ;;
           SIGNALS) list_find "$BOOST_LIBS_MZ" signals          ;;
            PYTHON) is_depends_enabled $SPELL python ||
                    is_depends_enabled $SPELL python3 ;;
            SYSTEM) list_find "$BOOST_LIBS_MZ" system           ;;
            THREAD) list_find "$BOOST_LIBS_MZ" thread           ;;
            CHRONO) list_find "$BOOST_LIBS_AL" chrono           ;;
           CONTEXT) list_find "$BOOST_LIBS_AL" context          ;;
             GRAPH) list_find "$BOOST_LIBS_AL" graph            ;;
             REGEX) list_find "$BOOST_LIBS_MZ" regex            ;;
              TEST) list_find "$BOOST_LIBS_MZ" test             ;;
              WAVE) list_find "$BOOST_LIBS_MZ" wave             ;;
               MPI) list_find "$BOOST_LIBS_MZ" mpi              ;;
            LOCALE) list_find "$BOOST_LIBS_AL" locale           ;;
             TIMER) list_find "$BOOST_LIBS_MZ" timer            ;;
              MATH) list_find "$BOOST_LIBS_MZ" math             ;;
# boost-1.53
            ATOMIC) list_find "$BOOST_LIBS_AL" atomic           ;;
         COROUTINE) list_find "$BOOST_LIBS_AL" coroutine        ;;
# boost-1.54
               LOG) list_find "$BOOST_LIBS_AL" log              ;;
# boost-1.55
# boost-1.56
            ALIGN)  list_find "$BOOST_LIBS_AL" align           ;;
            ASSERT) list_find "$BOOST_LIBS_AL" assert          ;;
            CORE)   list_find "$BOOST_LIBS_AL" core            ;;
            LEXICAL_CAST)    list_find "$BOOST_LIBS_AL" lexical_cast ;;
            THROW_EXCEPTION) list_find "$BOOST_LIBS_MZ" throw_exception  ;;
            TYPE_INDEX)      list_find "$BOOST_LIBS_MZ" type_index  ;;
*) message "${PROBLEM_COLOR}bogus sub_depends: $SPELL $THIS_SUB_DEPENDS${DEFAULT_COLOR}" ;
   return 1;;
esac