From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp2 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id 6IQJL769EmCAEAAA0tVLHw (envelope-from ) for ; Thu, 28 Jan 2021 13:35:58 +0000 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp2 with LMTPS id ALnuKr69EmD/dwAAB5/wlQ (envelope-from ) for ; Thu, 28 Jan 2021 13:35:58 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id 7FC8394030E for ; Thu, 28 Jan 2021 13:35:58 +0000 (UTC) Received: from localhost ([::1]:47352 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l57Sn-00025o-GS for larch@yhetil.org; Thu, 28 Jan 2021 08:35:57 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:55088) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l57SO-000241-Q0 for guix-devel@gnu.org; Thu, 28 Jan 2021 08:35:33 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:41965) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l57SM-00029g-L6; Thu, 28 Jan 2021 08:35:32 -0500 Received: from [2a01:e0a:1d:7270:af76:b9b:ca24:c465] (port=58088 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1l57S2-00019S-Ig; Thu, 28 Jan 2021 08:35:16 -0500 From: =?utf-8?Q?Ludovic_Court=C3=A8s?= To: Maxim Cournoyer Subject: Re: Building Guile with =?utf-8?B?4oCYLWox4oCZPw==?= References: <87r1mgf19s.fsf@inria.fr> <877do7gw4i.fsf@netris.org> <87im7qfhfe.fsf@gmail.com> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 9 =?utf-8?Q?Pluvi=C3=B4se?= an 229 de la =?utf-8?Q?R?= =?utf-8?Q?=C3=A9volution?= X-PGP-Key-ID: 0x090B11993D9AEBB5 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5 X-OS: x86_64-pc-linux-gnu Date: Thu, 28 Jan 2021 14:35:08 +0100 In-Reply-To: <87im7qfhfe.fsf@gmail.com> (Maxim Cournoyer's message of "Thu, 21 Jan 2021 10:17:25 -0500") Message-ID: <87sg6lnq0j.fsf@gnu.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Guix Devel Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN X-Migadu-Spam-Score: -1.85 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Queue-Id: 7FC8394030E X-Spam-Score: -1.85 X-Migadu-Scanner: scn1.migadu.com X-TUID: /CHFPQnGWz0d Hi Maxim, Maxim Cournoyer skribis: > Mark H Weaver writes: > >> Hi Ludovic, >> >> Ludovic Court=C3=A8s writes: >> >>> As the saying goes, =E2=80=9Cthe cobbler=E2=80=99s children go barefoot= =E2=80=9D. Guile/Guix >>> are no exception since Guile builds are non-reproducible, despite work >>> done a few years ago: >>> >>> https://issues.guix.gnu.org/20272 >>> >>> Until it=E2=80=99s fixed in Guile proper, what do you think of building= Guile >>> 2.0/2.2/3.0 with #:parallel-build? #f ? We could do that in >>> =E2=80=98core-updates=E2=80=99 now. I pushed that as 2ea52f90141974fb5d88b8c6b1785817c4203da4. > I'm not too found of it. It'll make the already slow Guile build much > slower, making the lower strata of core-updates packages more painfully > slow to build and test. Yes, it=E2=80=99s suboptimal. OTOH, as I wrote, I think the slowdown is no= t as important as one might think: a large fraction of the Guile build time goes into building ice-9/eval.scm and the first few files, which is already sequential (enforced by Guile=E2=80=99s makefile). > It'll also enable us to overlook the issue for years to come > (similarly to the fact that the testsuite of the Guix package itself > hasn't been run in parallel for the last 6 years or so :-)). It remains and bug to fix in Guile, no doubt. But we also have to be pragmatic IMO. > It also won't fix the issue of Guix modules compiled in parallel > suffering from the same problem. Definitely. > So I'd keep it as it is for now, as a reminder that this is a serious > problem in need of a fix. There=E2=80=99s also the problem that a fix in Guile takes time to deploy (basically a =E2=80=98core-updates=E2=80=99 cycle). It=E2=80=99s not the f= irst time we work around a Guile bug until it=E2=80=99s fixed in Guile proper. Thanks, Ludo=E2=80=99.