make-host-2.sh

   1 #!/bin/sh
   2
   3 # This is a script to be run as part of make.sh. The only time you'd
   4 # want to run it by itself is if you're trying to cross-compile the
   5 # system or if you're doing some kind of troubleshooting.
   6
   7 # This software is part of the SBCL system. See the README file for
   8 # more information.
   9 #
  10 # This software is derived from the CMU CL system, which was
  11 # written at Carnegie Mellon University and released into the
  12 # public domain. The software is in the public domain and is
  13 # provided with absolutely no warranty. See the COPYING and CREDITS
  14 # files for more information.
  15
  16 echo //entering make-host-2.sh
  17
  18 # In some cases, a debugging build of the system will creates a core
  19 # file output/after-xc.core in the next step. In cases where it
  20 # doesn't, it's confusing and basically useless to have any old copies
  21 # lying around, so delete:
  22 rm -f output/after-xc.core
  23
  24 # In a fresh host Lisp invocation, load and run the cross-compiler to
  25 # create the target object files describing the target SBCL.
  26 #
  27 # (There are at least three advantages to running the cross-compiler in a
  28 # fresh host Lisp invocation instead of just using the same Lisp invocation
  29 # that we used to compile it:
  30 #   (1) It reduces the chance that the cross-compilation process
  31 #       inadvertently comes to depend on some weird compile-time
  32 #       side effect.
  33 #   (2) It reduces peak memory demand (because definitions wrapped in
  34 #       (EVAL-WHEN (:COMPILE-TOPLEVEL :EXECUTE) ..) aren't defined
  35 #       in the fresh image).
  36 #   (3) It makes it easier to jump in and retry a step when tweaking
  37 #       and experimenting with the bootstrap procedure.
  38 # Admittedly, these don't seem to be enormously important advantages, but
  39 # the only disadvantage seems to be the extra time required to reload
  40 # the fasl files into the new host Lisp, and that doesn't seem to be
  41 # an enormously important disadvantage, either.)
  42 echo //running cross-compiler to create target object files
  43 $SBCL_XC_HOST <<-'EOF' || exit 1
  44
  45         ;;;
  46         ;;; Set up the cross-compiler.
  47         ;;;
  48         (setf *print-level* 5 *print-length* 5)
  49         (load "src/cold/shared.lisp")
  50         (in-package "SB-COLD")
  51         (setf *host-obj-prefix* "obj/from-host/"
  52               *target-obj-prefix* "obj/from-xc/")
  53         (load "src/cold/set-up-cold-packages.lisp")
  54         (load "src/cold/defun-load-or-cload-xcompiler.lisp")
  55         (load-or-cload-xcompiler #'host-load-stem)
  56         (defun proclaim-target-optimization ()
  57           (let ((debug (if (position :sb-show *shebang-features*) 2 1)))
  58             (sb-xc:proclaim `(optimize (compilation-speed 1)
  59                                        (debug ,debug)
  60                                        (sb!ext:inhibit-warnings 2)
  61                                        ;; SAFETY = SPEED (and < 3) should
  62                                        ;; reasonable safety, but might skip
  63                                        ;; some unreasonably expensive stuff
  64                                        ;; (e.g. %DETECT-STACK-EXHAUSTION
  65                                        ;; in sbcl-0.7.2).
  66                                        (safety 2)
  67                                        (space 1)
  68                                        (speed 2)))))
  69         (compile 'proclaim-target-optimization)
  70         (defun in-target-cross-compilation-mode (fun)
  71           "Call FUN with everything set up appropriately for cross-compiling
  72           a target file."
  73           (let (;; In order to increase microefficiency of the target Lisp,
  74                 ;; enable old CMU CL defined-function-types-never-change
  75                 ;; optimizations. (ANSI says users aren't supposed to
  76                 ;; redefine our functions anyway; and developers can
  77                 ;; fend for themselves.)
  78                 #!-sb-fluid (sb!ext:*derive-function-types* t)
  79                 ;; Let the target know that we're the cross-compiler.
  80                 (*features* (cons :sb-xc *features*))
  81                 ;; We need to tweak the readtable..
  82                 (*readtable* (copy-readtable)))
  83             ;; ..in order to make backquotes expand into target code
  84             ;; instead of host code.
  85             ;; FIXME: Isn't this now taken care of automatically by
  86             ;; toplevel forms in the xcompiler backq.lisp file?
  87             (set-macro-character #\` #'sb!impl::backquote-macro)
  88             (set-macro-character #\, #'sb!impl::comma-macro)
  89             ;; Control optimization policy.
  90             (proclaim-target-optimization)
  91             ;; Specify where target machinery lives.
  92             (with-additional-nickname ("SB-XC" "SB!XC")
  93               (funcall fun))))
  94         (compile 'in-target-cross-compilation-mode)
  95         (setf *target-compile-file* #'sb-xc:compile-file)
  96         (setf *target-assemble-file* #'sb!c:assemble-file)
  97         (setf *in-target-compilation-mode-fn*
  98               #'in-target-cross-compilation-mode)
  99
 100         ;;;
 101         ;;; Run the cross-compiler to produce cold fasl files.
 102         ;;;
 103         (load "src/cold/compile-cold-sbcl.lisp")
 104
 105         ;;;
 106         ;;; miscellaneous tidying up and saving results
 107         ;;;
 108         (let ((filename "output/object-filenames-for-genesis.lisp-expr"))
 109           (ensure-directories-exist filename :verbose t)
 110           (with-open-file (s filename :direction :output)
 111             (write *target-object-file-names* :stream s :readably t)))
 112         ;; Let's check that the type system was reasonably sane. (It's
 113         ;; easy to spend a long time wandering around confused trying
 114         ;; to debug cold init if it wasn't.)
 115         (when (position :sb-test *shebang-features*)
 116           (load "tests/type.after-xc.lisp"))
 117         ;; If you're experimenting with the system under a
 118         ;; cross-compilation host which supports CMU-CL-style SAVE-LISP,
 119         ;; this can be a good time to run it. The resulting core isn't
 120         ;; used in the normal build, but can be handy for experimenting
 121         ;; with the system. (See slam.sh for an example.)
 122         (when (position :sb-after-xc-core *shebang-features*)
 123           #+cmu (ext:save-lisp "output/after-xc.core" :load-init-file nil)
 124           #+sbcl (sb-ext:save-lisp-and-die "output/after-xc.core")
 125           )
 126         #+cmu (ext:quit)
 127         EOF
 128
 129 # Run GENESIS (again) in order to create cold-sbcl.core. (The first
 130 # time was before we ran the cross-compiler, in order to create the
 131 # header file which was needed in order to run gcc on the runtime
 132 # code.)
 133 sh make-genesis-2.sh