From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: defvar and "assignment to free variable" (was: Re: on specifying the C source code directory) Date: Wed, 03 Feb 2016 00:04:40 +0100 Message-ID: <87vb667lyv.fsf_-_@debian.uxu> References: <87oac34e2o.fsf@debian.uxu> <871t8z6tgc.fsf@robertthorpeconsulting.com> <87io297a26.fsf@debian.uxu> <0q7fio63c2.fsf_-_@toledo.com> <87egcwhah7.fsf@mbork.pl> <20160201123254.GA14737@tuxteam.de> <0qlh744c19.fsf@toledo.com> <87zivk7yps.fsf@debian.uxu> <8737tbh8xh.fsf@mbork.pl> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1454454338 27048 80.91.229.3 (2 Feb 2016 23:05:38 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 2 Feb 2016 23:05:38 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed Feb 03 00:05:29 2016 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1aQk0j-0000xl-L8 for geh-help-gnu-emacs@m.gmane.org; Wed, 03 Feb 2016 00:05:25 +0100 Original-Received: from localhost ([::1]:59862 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aQk0i-00034t-VL for geh-help-gnu-emacs@m.gmane.org; Tue, 02 Feb 2016 18:05:24 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:54525) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aQk0X-00034U-8Y for help-gnu-emacs@gnu.org; Tue, 02 Feb 2016 18:05:14 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aQk0S-0007df-9e for help-gnu-emacs@gnu.org; Tue, 02 Feb 2016 18:05:13 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:55662) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aQk0S-0007dG-3K for help-gnu-emacs@gnu.org; Tue, 02 Feb 2016 18:05:08 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1aQk0O-0000Sw-K8 for help-gnu-emacs@gnu.org; Wed, 03 Feb 2016 00:05:04 +0100 Original-Received: from nl106-137-227.student.uu.se ([130.243.137.227]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 03 Feb 2016 00:05:04 +0100 Original-Received: from embe8573 by nl106-137-227.student.uu.se with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 03 Feb 2016 00:05:04 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Original-Lines: 25 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: nl106-137-227.student.uu.se Mail-Copies-To: never User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) Cancel-Lock: sha1:73NzT5wH9QDxFjFIOlBfYNZ6/bI= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:108977 Archived-At: Marcin Borkowski writes: > As the docstring says, in Unix this is so. > I don't know about other systems. Me neither :) >> (defvar find-function-C-source-directory) >> (setq find-function-C-source-directory "~/.emacs.d/emacs-24.1/src") > > Out of curiosity: why defvar? Without it, when I compile, it says: In toplevel form: help-new.el:11:7:Warning: assignment to free variable `find-function-C-source-directory' `defvar' here is just used to communicate that you will use the variable. Because that's exactly what happens next, this isn't a hack. Really! -- underground experts united http://user.it.uu.se/~embe8573