Re: declare-function in files from Gnus (hashcash.el, imap.el)

[Richard Stallman]

    > (unless (fboundp 'declare-function) (defmacro declare-function (&rest r)))

Yes, that is the way to do it.

    I think this is not a good idea...

    ,----[ (info "(elisp)Coding Conventions") ]
    |    * If a package needs to define an alias or a new function for
    |      compatibility with some other version of Emacs,

This is not that kind of case.  It is a case of backward compatibility
for old Emacs versions.