From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: [Emacs-diffs] /srv/bzr/emacs/trunk r101633: Add fd handling with callbacks to select, dbus needs it for async operation. Date: Mon, 27 Sep 2010 03:43:15 -0400 Message-ID: References: <4C9FB21E.209@swipnet.se> <83k4m8qi8q.fsf@gnu.org> <4CA039F3.1050102@swipnet.se> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: dough.gmane.org 1285573410 13481 80.91.229.12 (27 Sep 2010 07:43:30 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Mon, 27 Sep 2010 07:43:30 +0000 (UTC) Cc: emacs-devel@gnu.org To: =?UTF-8?B?SmFuIERqw6Rydg==?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Sep 27 09:43:29 2010 Return-path: Envelope-to: ged-emacs-devel@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 1P08My-000331-F0 for ged-emacs-devel@m.gmane.org; Mon, 27 Sep 2010 09:43:28 +0200 Original-Received: from localhost ([127.0.0.1]:41262 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1P08Mx-0002Mf-Mo for ged-emacs-devel@m.gmane.org; Mon, 27 Sep 2010 03:43:27 -0400 Original-Received: from [140.186.70.92] (port=46111 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1P08Mn-0002La-EH for emacs-devel@gnu.org; Mon, 27 Sep 2010 03:43:18 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1P08Ml-0008RB-Cx for emacs-devel@gnu.org; Mon, 27 Sep 2010 03:43:17 -0400 Original-Received: from fencepost.gnu.org ([140.186.70.10]:34311) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1P08Ml-0008R7-Bl for emacs-devel@gnu.org; Mon, 27 Sep 2010 03:43:15 -0400 Original-Received: from eliz by fencepost.gnu.org with local (Exim 4.69) (envelope-from ) id 1P08Ml-000804-5H; Mon, 27 Sep 2010 03:43:15 -0400 In-reply-to: <4CA039F3.1050102@swipnet.se> (message from =?UTF-8?B?SmFuIERqw6Rydg==?= on Mon, 27 Sep 2010 08:30:11 +0200) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:130973 Archived-At: > Date: Mon, 27 Sep 2010 08:30:11 +0200 > From: Jan Djärv > CC: emacs-devel@gnu.org > > This case may be simple, but what does subprocesses (for exampe) mean? It > doesn't mean just "have subprocess", it also means "we can do select" and "we > can listen to many inputs at once", and so on. It means the build supports async subprocesses. Once upon a time, several platforms where Emacs could be built did not have this capability, but nowadays only the DOS build remains without it. Quite a few of the macros are documented in src/config.in and in src/m/*.h and src/s/*.h header files. This one is in config.in. Btw, `select' is not the problem here, because even the DOS build has it. The issue is whether you have `pipe' and `fork'/`exec' (or some equivalents thereof), and whether `select' can handle network file descriptors.