From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: pjb@informatimago.com (Pascal J. Bourguignon) Newsgroups: gmane.emacs.help Subject: Re: System operating detection Date: Wed, 11 Aug 2010 16:27:11 +0200 Organization: Informatimago Message-ID: <87k4nx9qdc.fsf@kuiper.lan.informatimago.com> 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 1291857083 795 80.91.229.12 (9 Dec 2010 01:11:23 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 9 Dec 2010 01:11:23 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Thu Dec 09 02:11:19 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 1PQV2U-0005yp-6K for geh-help-gnu-emacs@m.gmane.org; Thu, 09 Dec 2010 02:11:18 +0100 Original-Received: from localhost ([127.0.0.1]:54316 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PQV2T-0001xb-Fm for geh-help-gnu-emacs@m.gmane.org; Wed, 08 Dec 2010 20:11:17 -0500 Original-Path: usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 62 Original-X-Trace: individual.net 3pNCE965x+ueFRp+ErWn4QU8Ln+MTTFp9jcSujBiYixDZcqJTy Cancel-Lock: sha1:NmZmOGI5MGVkMmNjYzZhNjU5NDA0ZjQyYTJjNzBjNzkzYmNlMzZhZQ== sha1:5HNH3/AozVJvNwQt60fyiPL3ZD0= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en X-Disabled: X-No-Archive: no User-Agent: Gnus/5.101 (Gnus v5.10.10) Emacs/23.2 (gnu/linux) Original-Xref: usenet.stanford.edu gnu.emacs.help:180581 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:76357 Archived-At: Andrea Crotti writes: > 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? What if you write simply: (when (eq system-type 'gnu/linux) ...) ? or, if you have several cases: (case system-type ((gnu/linux) (do-something-on-linux)) ((mac) (do-something-on-mac)) (otherwise (do-something-standard))) ? -- __Pascal Bourguignon__ http://www.informatimago.com/