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;;;; -------------------------------------------------------------------------
;;;; Support to build (compile and load) Lisp files

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(asdf/package:define-package :asdf/lisp-build
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  (:recycle :asdf/interface :asdf :asdf/lisp-build)
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  (:use :common-lisp :asdf/package :asdf/compatibility :asdf/utility
        :asdf/pathname :asdf/stream :asdf/os :asdf/image)
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  (:export
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   ;; Variables
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   #:*compile-file-warnings-behaviour* #:*compile-file-failure-behaviour*
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   #:*compile-file-function* #:*output-translation-function*
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   #:*optimization-settings* #:*previous-optimization-settings*
   #:*uninteresting-compiler-conditions* #:*uninteresting-loader-conditions*
   #:*deferred-warnings*
   ;; Functions & Macros
   #:get-optimization-settings #:proclaim-optimization-settings
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   #:call-with-muffled-compiler-conditions #:with-muffled-compiler-conditions
   #:call-with-muffled-loader-conditions #:with-muffled-loader-conditions
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   #:call-with-asdf-compilation-unit #:with-asdf-compilation-unit
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   #:lispize-pathname #:fasl-type #:call-around-hook
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   #:compile-file* #:compile-file-pathname*
   #+(or ecl mkcl) #:compile-file-keeping-object
   #:load* #:load-from-string
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   #:combine-fasls))
(in-package :asdf/lisp-build)

(defvar *compile-file-warnings-behaviour*
  (or #+clisp :ignore :warn)
  "How should ASDF react if it encounters a warning when compiling a file?
Valid values are :error, :warn, and :ignore.")

(defvar *compile-file-failure-behaviour*
  (or #+(or mkcl sbcl) :error #+clisp :ignore :warn)
  "How should ASDF react if it encounters a failure (per the ANSI spec of COMPILE-FILE)
when compiling a file?  Valid values are :error, :warn, and :ignore.
Note that ASDF ALWAYS raises an error if it fails to create an output file when compiling.")

(defvar *compile-file-function* 'compile-file*
  "Function used to compile lisp files.")

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;;; Optimization settings

(defvar *optimization-settings* nil)
(defvar *previous-optimization-settings* nil)
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(defun* get-optimization-settings ()
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  "Get current compiler optimization settings, ready to PROCLAIM again"
  (let ((settings '(speed space safety debug compilation-speed #+(or cmu scl) c::brevity)))
    #-(or clisp clozure cmu ecl sbcl scl)
    (warn "xcvb-driver::get-optimization-settings does not support your implementation. Please help me fix that.")
    #.`(loop :for x :in settings
         ,@(or #+clozure '(:for v :in '(ccl::*nx-speed* ccl::*nx-space* ccl::*nx-safety* ccl::*nx-debug* ccl::*nx-cspeed*))
               #+ecl '(:for v :in '(c::*speed* c::*space* c::*safety* c::*debug*))
               #+(or cmu scl) '(:for f :in '(c::cookie-speed c::cookie-space c::cookie-safety c::cookie-debug c::cookie-cspeed c::cookie-brevity)))
         :for y = (or #+clisp (gethash x system::*optimize*)
                      #+(or clozure ecl) (symbol-value v)
                      #+(or cmu scl) (funcall f c::*default-cookie*)
                      #+sbcl (cdr (assoc x sb-c::*policy*)))
         :when y :collect (list x y))))
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(defun* proclaim-optimization-settings ()
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  "Proclaim the optimization settings in *OPTIMIZATION-SETTINGS*"
  (proclaim `(optimize ,@*optimization-settings*))
  (let ((settings (get-optimization-settings)))
    (unless (equal *previous-optimization-settings* settings)
      (setf *previous-optimization-settings* settings))))


;;; Condition control

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(defvar *uninteresting-compiler-conditions*
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  (append
   #+sbcl
   '(sb-c::simple-compiler-note
     "&OPTIONAL and &KEY found in the same lambda list: ~S"
     sb-int:package-at-variance
     sb-kernel:uninteresting-redefinition
     sb-kernel:undefined-alien-style-warning
     sb-ext:implicit-generic-function-warning
     sb-kernel:lexical-environment-too-complex
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     "Couldn't grovel for ~A (unknown to the C compiler)."
     ;; BEWARE: the below four are controversial to include here.
     sb-kernel:redefinition-with-defun
     sb-kernel:redefinition-with-defgeneric
     sb-kernel:redefinition-with-defmethod
     sb-kernel::redefinition-with-defmacro) ; not exported by old SBCLs
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   ;;#+clozure '(ccl:compiler-warning)
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   '("No generic function ~S present when encountering macroexpansion of defmethod. Assuming it will be an instance of standard-generic-function.")) ;; from closer2mop
  "Conditions that may be skipped while compiling")
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(defvar *uninteresting-loader-conditions*
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  (append
   '("Overwriting already existing readtable ~S." ;; from named-readtables
     #(#:finalizers-off-warning :asdf-finalizers)) ;; from asdf-finalizers
   #+clisp '(clos::simple-gf-replacing-method-warning))
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  "Additional conditions that may be skipped while loading")
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(defvar *deferred-warnings* ()
  "Warnings the handling of which is deferred until the end of the compilation unit")

;;;; ----- Filtering conditions while building -----

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(defun* call-with-muffled-compiler-conditions (thunk)
  (call-with-muffled-conditions
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    thunk *uninteresting-compiler-conditions*))
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(defmacro with-muffled-compiler-conditions ((&optional) &body body)
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  "Run BODY where uninteresting compiler conditions are muffled"
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  `(call-with-muffled-compiler-conditions #'(lambda () ,@body)))
(defun* call-with-muffled-loader-conditions (thunk)
  (call-with-muffled-conditions
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   thunk (append *uninteresting-compiler-conditions* *uninteresting-loader-conditions*)))
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(defmacro with-muffled-loader-conditions ((&optional) &body body)
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  "Run BODY where uninteresting compiler and additional loader conditions are muffled"
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  `(call-with-muffled-loader-conditions #'(lambda () ,@body)))
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(defun* save-forward-references (forward-references)
  ;; TODO: replace with stuff in POIU
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  "Save forward reference conditions so they may be issued at a latter time,
possibly in a different process."
  #+sbcl
  (loop :for w :in sb-c::*undefined-warnings*
    :for kind = (sb-c::undefined-warning-kind w) ; :function :variable :type
    :for name = (sb-c::undefined-warning-name w)
    :for symbol = (cond
                    ((consp name)
                     (unless (eq kind :function)
                       (error "unrecognized warning ~S not a function?" w))
                     (ecase (car name)
                       ((setf)
                        (assert (and (consp (cdr name)) (null (cddr name))) ())
				  (setf kind :setf-function)
                        (second name))
                       ((sb-pcl::slot-accessor)
                        (assert (eq :global (second name)))
                        (assert (eq 'boundp (fourth name)))
                        (assert (null (nthcdr 4 name)))
                        (setf kind :sb-pcl-global-boundp-slot-accessor)
                        (third name))))
                    (t
                     (assert (member kind '(:function :variable :type)) ())
                     name))
    :for symbol-name = (symbol-name symbol)
    :for package-name = (package-name (symbol-package symbol))
    :collect `(:undefined ,symbol-name ,package-name ,kind) :into undefined-warnings
    :finally (setf *deferred-warnings* undefined-warnings
                   sb-c::*undefined-warnings* nil))
  (when forward-references
    (with-open-file (s forward-references :direction :output :if-exists :supersede)
      (write *deferred-warnings* :stream s :pretty t :readably t)
      (terpri s))))

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(defun* call-with-asdf-compilation-unit (thunk &key forward-references)
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  (with-compilation-unit (:override t)
    (let ((*deferred-warnings* ())
          #+sbcl (sb-c::*undefined-warnings* nil))
      (multiple-value-prog1
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          (with-muffled-compiler-conditions ()
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            (funcall thunk))
        (save-forward-references forward-references)))))

(defmacro with-asdf-compilation-unit ((&key forward-references) &body body)
  "Like WITH-COMPILATION-UNIT, but saving forward-reference issues
for processing later (possibly in a different process)."
  `(call-with-xcvb-compilation-unit #'(lambda () ,@body) :forward-references ,forward-references))


;;; from ASDF

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(defun* lispize-pathname (input-file)
  (make-pathname :type "lisp" :defaults input-file))

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(defun* fasl-type (&rest keys)
  "pathname TYPE for lisp FASt Loading files"
  (declare (ignorable keys))
  #-ecl (load-time-value (pathname-type (compile-file-pathname "foo.lisp")))
  #+ecl (pathname-type (apply 'compile-file-pathname "foo.lisp" keys)))

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(defun* call-around-hook (hook function)
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  (call-function (or hook 'funcall) function))
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(defun* compile-file* (input-file &rest keys &key compile-check output-file &allow-other-keys)
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  (let* ((keywords (remove-keys
                    `(:compile-check #+gcl<2.7 ,@'(:external-format :print :verbose)) keys))
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         (output-file (apply 'compile-file-pathname* input-file :output-file output-file keywords))
         (tmp-file (tmpize-pathname output-file))
         (status :error))
    (multiple-value-bind (output-truename warnings-p failure-p)
        (apply 'compile-file input-file :output-file tmp-file keywords)
      (cond
        (failure-p
         (setf status *compile-file-failure-behaviour*))
        (warnings-p
         (setf status *compile-file-warnings-behaviour*))
        (t
         (setf status :success)))
      (cond
        ((and (ecase status
                ((:success :warn :ignore) t)
                ((:error nil)))
              (or (not compile-check)
                  (apply compile-check input-file :output-file tmp-file keywords)))
         (delete-file-if-exists output-file)
         (when output-truename
           (rename-file-overwriting-target output-truename output-file)
           (setf output-truename output-file)))
        (t ;; error or failed check
         (delete-file-if-exists output-truename)
         (setf output-truename nil failure-p t)))
      (values output-truename warnings-p failure-p))))

(defun* compile-file-pathname* (input-file &rest keys &key output-file &allow-other-keys)
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  (let* ((keys
           (remove-keys `(#+(and allegro (not (version>= 8 2))) :external-format
                            ,@(unless output-file '(:output-file))) keys)))
    (if (absolute-pathname-p output-file)
        ;; what cfp should be doing, w/ mp* instead of mp
        (let* ((type (pathname-type (apply 'fasl-type keys)))
               (defaults (make-pathname
                          :type type :defaults (merge-pathnames* input-file))))
          (merge-pathnames* output-file defaults))
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        (funcall *output-translation-function*
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                 (apply 'compile-file-pathname input-file keys)))))
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(defun* load* (x &rest keys &key &allow-other-keys)
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  (etypecase x
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    ((or pathname string #-(or gcl<2.7 clozure allegro) stream)
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     (apply 'load x
            #-gcl<2.7 keys #+gcl<2.7 (remove-keyword :external-format keys)))
    #-(or gcl<2.7 clozure allegro)
    ;; GCL 2.6 can't load from a string-input-stream
    ;; ClozureCL 1.6 can only load from file input stream
    ;; Allegro 5, I don't remember but it must have been broken when I tested.
    (stream ;; make do this way
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     (let ((*package* *package*)
           (*readtable* *readtable*)
           (*load-pathname* nil)
           (*load-truename* nil))
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       (eval-input x)))))

(defun* load-from-string (string)
  "Portably read and evaluate forms from a STRING."
  (with-input-from-string (s string) (load* s)))

;;; In ECL and MKCL, compilation produces *both*
;; a loadable FASL file and the linkable object file that it was built from.
;; Having both of them allows us to later on reuse the object files
;; when linking bundles, libraries, standalone executables, etc.
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#+(or ecl mkcl)
(progn
  (setf *compile-file-function* 'compile-file-keeping-object)

  (defun* compile-file-keeping-object (input-file &rest keys &key output-file &allow-other-keys)
    (#+ecl if #+ecl (use-ecl-byte-compiler-p) #+ecl (apply 'compile-file* input-file keys)
     #+mkcl progn
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     (let ((object-file
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             (compile-file-pathname
              output-file #+ecl :type #+ecl :object #+mkcl :fasl-p #+mkcl nil)))
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       (multiple-value-bind (result flags1 flags2)
           (apply 'compile-file* input-file
                  #+ecl :system-p #+ecl t #+mkcl :fasl-p #+mkcl nil
                  :output-file object-file keys)
       (values (and (equal result object-file)
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                    (compiler::build-fasl
                     output-file #+ecl :lisp-files #+mkcl :lisp-object-files (list object-file))
                    object-file)
               flags1
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               flags2))))))
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;;; Links FASLs together
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(defun* combine-fasls (inputs output)
  #-(or allegro clisp clozure cmu lispworks sbcl scl xcl)
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  (error "~A does not support ~S~%inputs ~S~%output  ~S"
         (implementation-type) 'combine-fasls inputs output)
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  #+clozure (ccl:fasl-concatenate output inputs :if-exists :supersede)
  #+(or allegro clisp cmu sbcl scl xcl) (concatenate-files inputs output)
  #+lispworks
  (let (fasls)
    (unwind-protect
         (progn
           (loop :for i :in inputs
                 :for n :from 1
                 :for f = (add-pathname-suffix
                           output (format nil "-FASL~D" n))
                 :do #-lispworks-personal-edition (lispworks:copy-file i f)
                     #+lispworks-personal-edition (concatenate-files (list i) f)
                     (push f fasls))
           (ignore-errors (lispworks:delete-system :fasls-to-concatenate))
           (eval `(scm:defsystem :fasls-to-concatenate
                    (:default-pathname ,(pathname-directory-pathname output))
                    :members
                    ,(loop :for f :in (reverse fasls)
                           :collect `(,(namestring f) :load-only t))))
           (scm:concatenate-system output :fasls-to-concatenate))
      (loop :for f :in fasls :do (ignore-errors (delete-file f)))
      (ignore-errors (lispworks:delete-system :fasls-to-concatenate)))))