From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Phillip Lord Newsgroups: gmane.emacs.devel Subject: Re: [feature/dll-only-windows] A new windows build, comments wanted Date: Mon, 11 Jan 2021 09:47:12 +0000 Message-ID: <87pn2b7qlb.fsf@russet.org.uk> References: <87pn2dq3xv.fsf@russet.org.uk> <83ft39hnk1.fsf@gnu.org> <87sg78kew7.fsf@russet.org.uk> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="34617"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: Eli Zaretskii , emacs-devel@gnu.org To: Andrea Corallo Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Jan 11 10:48:33 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kytoP-0008qg-2V for ged-emacs-devel@m.gmane-mx.org; Mon, 11 Jan 2021 10:48:33 +0100 Original-Received: from localhost ([::1]:50438 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kytoO-0006Wq-4y for ged-emacs-devel@m.gmane-mx.org; Mon, 11 Jan 2021 04:48:32 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:51476) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kytnr-00066P-RK for emacs-devel@gnu.org; Mon, 11 Jan 2021 04:47:59 -0500 Original-Received: from cloud103.planethippo.com ([78.129.138.110]:59808) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kytnp-0008Uu-MR; Mon, 11 Jan 2021 04:47:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=russet.org.uk; s=default; h=Content-Type:MIME-Version:Message-ID: In-Reply-To:Date:References:Subject:Cc:To:From:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=b0CL9ZWoboBxV5uZzVV3GjmL4vCi1XnFBKbo6irJ86A=; b=Va96xPDoM7F0zSezkfhgDHoAw iuA3y4oxtBJTMF0KW/ot2N7uPVgPf7VdHR1WD8NxE+sFLh+ei3oPgMRgnoezSjz3xrejR0B1dHZaL DXYvXX+uuBKPnB1ztnKRj0o5LeL0CeOSsBAQ1YlP9qhxoTIjNbrFJ69KiJjaXCt2eD5j38glJBcIb WKEcfaFc3C8kgtJQdqBzKh53pZ1O7I18UemJnmnlzb2TrL8wZxH8v3LXZLWdVbaTIadmCy9knT5rR 4SUKhm0FOZF6eN9E2MqK7gu/+EvoM0tv+NfuMlgJ8/ekG8n9I0avdQpj4ZCxcHU1/7eyO4q15TH9X mzQ+nQzRQ==; Original-Received: from cpc142648-benw12-2-0-cust627.16-2.cable.virginm.net ([82.10.74.116]:60414 helo=russet.org.uk) by cloud103.planethippo.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1kytn7-0003y2-8k; Mon, 11 Jan 2021 09:47:13 +0000 In-Reply-To: (Andrea Corallo's message of "Sun, 10 Jan 2021 19:06:30 +0000") X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cloud103.planethippo.com X-AntiAbuse: Original Domain - gnu.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - russet.org.uk X-Get-Message-Sender-Via: cloud103.planethippo.com: authenticated_id: phillip.lord@russet.org.uk X-Authenticated-Sender: cloud103.planethippo.com: phillip.lord@russet.org.uk Received-SPF: none client-ip=78.129.138.110; envelope-from=phillip.lord@russet.org.uk; helo=cloud103.planethippo.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:262897 Archived-At: Andrea Corallo writes: > Phillip Lord writes: > >> >> I think there are two hairs here. Having an emacs compiled with >> nativecomp behave cleanly if libgccjit is not available at runtime. > > Right, at this stage this should be easy to implement (on Windows). > >> And having a runtime mechanism for switching nativecomp of totally >> even if it is compiled in. > > We should define "switching nativecomp of" and the triggering mechanism, > this might be already implmentented. >From a user perspective, I think that there are two reasons we might want to switch off native-comp. The first is because it's broken or providing buggy behaviour. In the extreme, and if I understand the build process fully, I guess this is impossible to switch of in a binary distribution, because some native-comp happens before dumping. Other than that, we can "switch off" native-comp by just deleting the *eln files, right, or otherwise preventing their loading. In practice, I think this is a minor motivation; if we discover bugs in the native-comp, they would be fixed by making another release. The second reason is that the initial compilation takes quite a lot of CPU. I wouldn't like that to happen while my laptop where in battery power, for instance. At the moment, it's possible to drop the number of jobs that native-comp uses. I don't think that there is a way to drop this to zero at the moment. Probably, we need that. Phil