Re: detect emacs/xemacs in elisp?

[Benjamin Lewis <bclewis@cs.sfu.ca>]

On 10 Dec 2002, Tim X. wrote:

> jason_addison@hotmail.com (Jason Addison) writes:
> 
>> I have some elisp that works/doesn't work in emacs/xemacs in my
>> ".emacs" file. I would like to be able to execute or not execute code
>> depending on which type of emacs I'm running. Another way around this
>> would be to know how to determine if a function is defined before
>> calling it. Any idea on how to do this in elisp? Also, how do you
>> determine the version of emacs that is running in elisp?
>> 
> 
> There is a package called initz which allows you to setup different
> initializations depending on what emacs/xemacs flavor you are
> running. This package will then control what init files are used
> depending on the flavor/version you are starting up.

Do you really need a ``package'' to do this?  Why not just make a .emacs
with something like

(defvar running-xemacs (string-match "XEmacs\\|Lucid" emacs-version))
(defvar running-em21 (>= emacs-major-version 21))

(cond (running-xemacs (load-file my-xemacs-init-file))
      (running-em21 (load-file my-em21-specific-file))
      (load-file my-default-file))

... or whatever.

-- 
Benjamin Lewis

Dinosaurs aren't extinct.  They've just learned to hide in the trees.