From: "Ville Skyttä" <ville.skytta@...>
Date: 2002-04-09T18:01:13+09:00
Subject: Re: [patch] update to (X)Emacs modes

On Tue, 2002-04-09 at 05:39, Nobuyoshi Nakada wrote:

> I found the announce of defcustom and defgroup in NEWS of Emacs
> 20.1, but couldn't about add-to-list.

A quick "grep -r" in Emacs sources reveals that 'add-to-list' was
already in 19.34.

Anyway, if you want to be completely sure, you could use setq instead of
add-to-list, and do something like this (from p4.el in XEmacs
prog-modes):

;; For flavors of Emacs which don't define `defgroup' and `defcustom'.
(eval-when-compile
  (if (not (fboundp 'defgroup))
      (defmacro defgroup (sym memb doc &rest args)
        "Null macro for defgroup in all versions of Emacs that don't
define defgroup"
        t))
  (if (not (fboundp 'defcustom))
      (defmacro defcustom (sym val doc &rest args)
        "Macro to alias defcustom to defvar in all versions of Emacs
that don't define defcustom"
        `(defvar ,sym ,val ,doc))))

Cheers,
-- 
Ville Skytt�
ville.skytta@xemacs.org