Paul Kinnucan <[EMAIL PROTECTED]> writes:
> Jeff Greif writes:
>
> > The problem appears to be the attempt to support both GNU Emacs and
> Xemacs using runtime conditionals. It appears that compile-time
> conditionals are needed in order to compile the code in
> tree-widget.el, or some additional runtime conditionals are needed,
> such as
>
> >
> > if (not (featurep 'xemacs))
> > (progn
> > (defvar widget-button-keymap nil)
> > (defun extent-list () nil)))
> >
> > You can also work around the problem in ways which break Xemacs
> support.
>
> Hi Jeff,
>
> Yes, most of the JDE Lisp files include XEmacs comptability code that
> leads to free variable warnings when the files are compiled under
> Emacs or under XEmacs. I don't know of any compile-time method of
> avoiding free variable warnings in the compiler output. Do you?
>
>
> - Paul
Yes it's possible.
The conditional forms suggested by Jeff need to be surrounded by
(eval-when-compile...), so the byte compiler sees the dummy
definitions.
I usually do something like the following:
(eval-and-compile
(defconst my-xemacs-flag (featurep 'xemacs)))
(eval-when-compile
(cond (my-xemacs-flag
(defvar gnu-emacs-variable nil)
(fset 'gnu-emacs-function nil))
(t ; GNU Emacs
(defvar xemacs-variable nil)
(fset 'xemacs-function nil))))
Cheers,
Mike
