src/code/cross-make-load-form.lisp

   1 ;;;; cross-compile-time-only replacements for make-load-form
   2 ;;;; machinery.
   3
   4 ;;;; This software is part of the SBCL system. See the README file for
   5 ;;;; more information.
   6 ;;;;
   7 ;;;; This software is derived from the CMU CL system, which was
   8 ;;;; written at Carnegie Mellon University and released into the
   9 ;;;; public domain. The software is in the public domain and is
  10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  11 ;;;; files for more information.
  12
  13 ;;; this probably deserves a word of explanation, as somewhat
  14 ;;; unusually we require the behaviour of this function to change
  15 ;;; depending on not at what stage we build it but at what stage we
  16 ;;; run it. This function will be called both when the host compiler
  17 ;;; dumps structures of type structure!object and when the
  18 ;;; cross-compiler does likewise; we don't control the dumper for the
  19 ;;; host compiler, so we use its own machinery for dumping host fasls,
  20 ;;; but we need to use target machinery for target fasls. We therefore
  21 ;;; dispatch on the presence of :SB-XC-HOST in the *FEATURES* list for
  22 ;;; which mechanism to use. This probably counts as a KLUDGE; a proper
  23 ;;; solution might be one or more of:
  24 ;;;
  25 ;;; * change def!struct to have two make-load-form-funs associated
  26 ;;;   with it; one to run when CL:MAKE-LOAD-FORM is called, and one
  27 ;;;   for SB!XC:MAKE-LOAD-FORM
  28 ;;;
  29 ;;; * implement MAKE-LOAD-FORM-SAVING-SLOTS properly rather than have
  30 ;;;   this magic value, and use it consistently.
  31 ;;;
  32 ;;; Also, something along these lines can remove the special case in
  33 ;;; EMIT-MAKE-LOAD-FORM in src/compiler/main.lisp.
  34
  35 (in-package "SB!INT")
  36
  37 (defun sb!xc:make-load-form-saving-slots (object &rest args
  38                                           &key slot-names environment)
  39   (declare (ignore environment))
  40   (if (member :sb-xc-host *features*)
  41       ;; we're still building the cross-compiler, so use the host's
  42       ;; mechanism:
  43       (apply #'make-load-form-saving-slots object args)
  44       ;; we're building cold fasls, so use the target's mechanism:
  45       ;;
  46       ;; KLUDGE: This is essentially the same definition as for the
  47       ;; target's MAKE-LOAD-FORM-SAVING-SLOTS; it would be nice to
  48       ;; share code with that if possible. -- CSR, 2002-05-30
  49       (if slot-names
  50           (bug "MAKE-LOAD-FORM-SAVING-SLOTS ~
  51                 called with :SLOT-NAMES argument during cross-compilation")
  52           :sb-just-dump-it-normally)))
  53