;;; FIXME: Since SBCL, unlike CMU CL, uses this as an opaque type,
;;; it's no longer architecture-dependent, and probably belongs in
;;; some other package, perhaps SB-KERNEL.
;;; FIXME: Since SBCL, unlike CMU CL, uses this as an opaque type,
;;; it's no longer architecture-dependent, and probably belongs in
;;; some other package, perhaps SB-KERNEL.