+(eval-when (:load-toplevel :compile-toplevel :execute)
+ ;; ASDF defines featurep, which we don't want to clobber. As such, shadow it
+ ;; here and then reference it with a pkg-config: prefix below.
+ (shadow :featurep)
+ (use-package :pkg-config))
+
+(export '(*search-library-path-on-reload* *dso-extension*
+ *operation* *system* *component* library shared-object
+ install-init-hook))
+
+(defvar *dso-extension*
+ #-(or darwin win32)"so" #+darwin"dylib" #+win32"dll")
+
+(defvar *search-library-path-on-reload* t)
+
+
+;;; Since Common Lisp implementations doesn't seem to agree on how to
+;;; run init hooks, we have to add our own compatibility layer.
+
+(defvar *init-hooks* ())
+
+(defun install-init-hook (func &optional (only-once t))
+ (if only-once
+ (pushnew func *init-hooks*)
+ (push func *init-hooks*)))
+
+(defun run-init-hooks ()
+ (mapcar #'funcall (reverse *init-hooks*)))
+
+(pushnew 'run-init-hooks
+ #+cmu ext:*after-save-initializations*
+ #+sbcl sb-ext:*init-hooks*
+ #+clisp custom:*init-hooks*)
+
+(defvar *reload-shared-objects* ()
+ "List of shared objects which should be reloaded from library search
+ path in saved images.")
+
+#?-(sbcl>= 1 0 22)
+(defvar *dont-save-shared-objects* ()
+ "List of shared objects which should not be saved in images.")
+
+(defun namestring-name (namestring)
+ (let ((pos (position #\/ namestring :from-end t)))
+ (if pos
+ (subseq namestring (1+ pos))
+ namestring)))
+
+(defun load-shared-object (pathname &optional dont-save-p (reload-p dont-save-p))
+ (let* ((namestring (ensure-namestring pathname)))
+ #?(sbcl< 1 0 22)(sb-alien:load-shared-object namestring)
+ #?(sbcl>= 1 0 22)
+ (sb-alien:load-shared-object namestring :dont-save dont-save-p)
+ #+cmu(ext:load-foreign namestring)
+ #?(clisp< 2 45)(ffi::foreign-library namestring)
+ #?(clisp>= 2 45)(ffi:open-foreign-library namestring)
+ (when dont-save-p
+ #?-(sbcl>= 1 0 22)
+ (pushnew namestring *dont-save-shared-objects* :test #'string=)
+ (when reload-p
+ (pushnew (namestring-name namestring)
+ *reload-shared-objects* :test #'string=)))))
+
+#?(or (sbcl< 1 0 22) (pkg-config:featurep :cmu))
+(progn
+ (defun remove-shared-objects ()
+ (dolist (namestring *dont-save-shared-objects*)
+ #+sbcl
+ (setf sb-alien::*shared-objects*
+ (remove namestring sb-alien::*shared-objects*
+ :key #'sb-alien::shared-object-file
+ :test #'string=))
+ #+cmu
+ (setf system::*global-table*
+ (remove namestring system::*global-table*
+ :key #'cdr :test #'string=))))
+ (pushnew 'remove-shared-objects
+ #+sbcl sb-ext:*save-hooks*
+ #+cmu ext:*before-save-initializations*))
+
+(defun reload-shared-objects ()
+ (handler-bind (#+sbcl (style-warning #'muffle-warning))
+ (dolist (namestring (reverse *reload-shared-objects*))
+ (load-shared-object namestring))))
+
+(install-init-hook 'reload-shared-objects)
+
+
+
+;;; The following code is more or less copied from sb-bsd-sockets.asd,
+;;; but extended to allow flags to be set in a general way. The class
+;;; has been renamed from unix-dso to shared-object as this code is no
+;;; longer specific to unix
+
+(defclass shared-object (module)
+ ((ldflags :initform nil :initarg :ldflags)
+ (search :initform *search-library-path-on-reload* :initarg :search
+ :reader search-library-path-on-reload)))
+
+(defun ensure-namestring (pathname)