From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Andrea Crotti Newsgroups: gmane.emacs.help Subject: Re: System operating detection Date: Wed, 11 Aug 2010 14:58:30 +0200 Message-ID: References: <87vd7hmkcn.fsf@tux.homenetwork> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: dough.gmane.org 1281531561 10162 80.91.229.12 (11 Aug 2010 12:59:21 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Wed, 11 Aug 2010 12:59:21 +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 Aug 11 14:59:19 2010 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1OjAtq-0006CI-TG for geh-help-gnu-emacs@m.gmane.org; Wed, 11 Aug 2010 14:59:19 +0200 Original-Received: from localhost ([127.0.0.1]:52806 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OjAtq-0000Xd-HE for geh-help-gnu-emacs@m.gmane.org; Wed, 11 Aug 2010 08:59:18 -0400 Original-Received: from [140.186.70.92] (port=40035 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OjAtO-0000WS-LU for help-gnu-emacs@gnu.org; Wed, 11 Aug 2010 08:58:51 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OjAtN-0003eg-JR for help-gnu-emacs@gnu.org; Wed, 11 Aug 2010 08:58:50 -0400 Original-Received: from lo.gmane.org ([80.91.229.12]:47625) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OjAtN-0003ea-Aj for help-gnu-emacs@gnu.org; Wed, 11 Aug 2010 08:58:49 -0400 Original-Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1OjAtL-0005y9-Gs for help-gnu-emacs@gnu.org; Wed, 11 Aug 2010 14:58:47 +0200 Original-Received: from xdsl-89-0-14-232.netcologne.de ([89.0.14.232]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 11 Aug 2010 14:58:47 +0200 Original-Received: from andrea.crotti.0 by xdsl-89-0-14-232.netcologne.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 11 Aug 2010 14:58:47 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 42 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: xdsl-89-0-14-232.netcologne.de User-Agent: Gnus/5.110011 (No Gnus v0.11) Emacs/23.2 (darwin) Cancel-Lock: sha1:FvReeWsEKyVvTeHWid0Lq1iaaDU= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:74541 Archived-At: Thierry Volpiatto writes: > Andrea Crotti writes: > > Use case: > > ,---- > | (case system-type > | (gnu/linux "Linux") > | (window-nt "windows") > | (darwin "mac") > | (t "other") > `---- > > > >> >> Ah great I didn't know this, so now is --8<---------------cut here---------------start------------->8--- (defconst linux nil) (defconst mac nil) (defconst win nil) (defconst other nil) (case system-type (gnu/linux (setq linux t)) (window-nt (setq mac t)) (darwin (setq win t)) (t (setq other t))) --8<---------------cut here---------------end--------------->8--- But maybe could be even better, what if I create the symbol only if really needed? Then I could do --8<---------------cut here---------------start------------->8--- (if (boundp linux)... --8<---------------cut here---------------end--------------->8--- which probably becomes even longer. Isn't there a way to automatically define functions or variables?