-extern lispobj *read_only_space;
-extern lispobj *static_space;
-extern lispobj *dynamic_0_space;
-extern lispobj *dynamic_1_space;
-extern lispobj *control_stack;
-extern lispobj *binding_stack;
-#ifdef __i386__
-extern lispobj *control_stack_end;
-#endif
-extern lispobj *current_dynamic_space;
-#if !defined(ibmrt) && !defined(__i386__)
-extern lispobj *current_dynamic_space_free_pointer;