+(defun check-deprecated-variable (name)
+ (let ((info (info :variable :deprecated name)))
+ (when info
+ (deprecation-warning (car info) (cdr info) name nil))))
+
+(defmacro define-deprecated-variable (state since name &key (value nil valuep) replacement)
+ `(progn
+ (setf (info :variable :deprecated ',name) (cons ,state ,since))
+ ,@(when (member state '(:early :late))
+ `((defvar ,name ,@(when valuep (list value))
+ ,(let ((*package* (find-package :keyword)))
+ (format nil
+ "~@<~S has been deprecated as of SBCL ~A~@[, use ~S instead~].~:>"
+ name since replacement)))))))
+