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From: Glenn Morris <rgm@gnu.org>
Newsgroups: gmane.emacs.gnus.general,gmane.emacs.devel
Subject: Re: declare-function in files from Gnus (hashcash.el, imap.el)
Date: Wed, 05 Dec 2007 16:01:05 -0500
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In-Reply-To: <v9tzmwubgr.fsf@marauder.physik.uni-ulm.de> (Reiner Steib's
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Archived-At: <http://permalink.gmane.org/gmane.emacs.gnus.general/65888>

Reiner Steib wrote:

> $ grep declare-function emacs/lisp/net/imap.el
> (unless (fboundp 'declare-function) (defmacro declare-function (&rest r)))

You need to wrap that in an (eval-and-compile), or use the --eval route.

> If some code test (fboundp 'declare-function) it probably expects that
> `declare-function' exists an DTRT.  And it might be confusing if the
> availability of `declare-function' depends on whether or not the user
> has loaded such a package.

declare-function does nothing. It will always do nothing. It exists
solely for the benefit of the byte-compiler. Without the supporting
code in bytecomp.el, it doesn't matter what defines it or where. It
makes no sense to test (fboundp 'declare-function).