From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Lars Ingebrigtsen Newsgroups: gmane.emacs.devel Subject: Re: Dependency graph for Emacs Lisp files Date: Thu, 01 Aug 2019 15:26:23 +0200 Message-ID: <87lfwdkoe8.fsf@mouse.gnus.org> References: <8736ilnmp7.fsf@mouse.gnus.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="53526"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Aug 01 15:26:43 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1htB6Q-000Dnb-SQ for ged-emacs-devel@m.gmane.org; Thu, 01 Aug 2019 15:26:42 +0200 Original-Received: from localhost ([::1]:55946 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1htB6P-00048i-UN for ged-emacs-devel@m.gmane.org; Thu, 01 Aug 2019 09:26:41 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:36601) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1htB6F-00048O-3e for emacs-devel@gnu.org; Thu, 01 Aug 2019 09:26:32 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1htB6D-0000Hf-VX for emacs-devel@gnu.org; Thu, 01 Aug 2019 09:26:31 -0400 Original-Received: from quimby.gnus.org ([80.91.231.51]:34342) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1htB6D-0000Gh-O2 for emacs-devel@gnu.org; Thu, 01 Aug 2019 09:26:29 -0400 Original-Received: from 77.18.62.220.tmi.telenormobil.no ([77.18.62.220] helo=sandy) by quimby.gnus.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1htB68-00077f-Jc; Thu, 01 Aug 2019 15:26:27 +0200 In-Reply-To: (Stefan Monnier's message of "Thu, 01 Aug 2019 09:00:59 -0400") X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 80.91.231.51 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:239103 Archived-At: Stefan Monnier writes: > The result was rather disappointing: > 1- lots of cycles > 2- incomplete dependencies (mostly due to autoloads). > 3- too many dependencies, resulting in excessive recompilation for > my taste Very excessive recompilation wouldn't be nice... > I believe (1) has improved over the years, but I'm sure there's still > a fair bit of that. Make didn't like them back then, and I don't think > it likes them more now. So we'd need some way to fix that (I guess we > could add some annotations in the source code to "ignore" some > dependencies). But are cycles a problem? You just delete all the .elc files in the cycle and then stop. > For (2), I think a better option is to generate the dependencies as > a side-effect of compilation using after-load-functions: we should be > able to collect reliably all the dependencies this way, regardless of > how the files get loaded. Hm... interesting. That makes me wonder whether the same thing could be used to collect the requires, too? > Regarding (3), I'm not sure how to deal with that. The problem is all > the (require 'foo) which are only really needed at run time. There are > various ways we could try and tackle the problem, but they all seem to > be way too invasive. Speaking of excessive recompilation, it seems like all the .c files are recompiled just about whenever anybody does something trivial in a .h file, but I guess that's unavoidable. (I get the feeling that every day when I do a "git pull" I get a full recompilation of the C bits in Emacs, and then a couple of .el files, but perhaps that's not completely accurate.) -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no