;;; nnheader.el --- header access macros for Semi-gnus and its backends
-;; Copyright (C) 1987, 1988, 1989, 1990, 1993, 1994, 1995, 1996,
-;; 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005
-;; Free Software Foundation, Inc.
+;; Copyright (C) 1987, 1988, 1989, 1990, 1993, 1994,
+;; 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003,
+;; 2004, 2005 Free Software Foundation, Inc.
;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
;; Lars Magne Ingebrigtsen <larsi@gnus.org>
(eval-when-compile (require 'cl))
(eval-when-compile (require 'static))
+(defvar nnmail-extra-headers)
+
;; Requiring `gnus-util' at compile time creates a circular
;; dependency between nnheader.el and gnus-util.el.
;;(eval-when-compile (require 'gnus-util))
(cond
((fboundp 'char-or-char-int-p) 'char-or-char-int-p)
((fboundp 'char-valid-p) 'char-valid-p)
- (t 'identity))))
+ (t 'identity)))
+
+ ;; Should keep track of the same function in mm-util.el.
+ (if (fboundp 'delete-dups)
+ (defalias 'mm-delete-duplicates 'delete-dups)
+ (defun mm-delete-duplicates (list)
+ "Destructively remove `equal' duplicates from LIST.
+Store the result in LIST and return it. LIST must be a proper list.
+Of several `equal' occurrences of an element in LIST, the first
+one is kept.
+
+This is a compatibility function for Emacsen without `delete-dups'."
+ ;; Code from `subr.el' in Emacs 22:
+ (let ((tail list))
+ (while tail
+ (setcdr tail (delete (car tail) (cdr tail)))
+ (setq tail (cdr tail))))
+ list)))
;; mail-parse stuff.
(unless (featurep 'mail-parse)