bug#14939: 24.3.50; `make-variable-frame-local' deprecation - alternative?

[Drew Adams <drew.adams@oracle.com>]

> > This is a move backward, IMO.
> 
> Yet, that's what we're doing and I have every intention to remove
> frame-local vars, so if you want your code to keep working in the
> future, better move away from make-variable-frame-local.

Too bad.  Still a move backward.

> > Consider minor mode `tool-bar-here-mode',
> 
> If you want a frame-local minor mode, you can do
>   (define-minor-mode foo-mode nil
>     :variable (frame-parameter nil 'foo-mode) ...)

Nope, not for Emacs 22.  Or 23.

Good to know, however, for when I need to write a library that
will be useful only for Emacs 24 and later (which will happen
sooner or later).