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 GFtWMTQi1l+lGgAA0tVLHw (envelope-from ) for ; Sun, 13 Dec 2020 14:16:20 +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 GDlKLTQi1l9dNgAAB5/wlQ (envelope-from ) for ; Sun, 13 Dec 2020 14:16:20 +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 892959402A5 for ; Sun, 13 Dec 2020 14:16:20 +0000 (UTC) Received: from localhost ([::1]:50700 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1koSAd-0006wi-Gl for larch@yhetil.org; Sun, 13 Dec 2020 09:16:19 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:54388) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1koSAL-0006wW-US for guix-patches@gnu.org; Sun, 13 Dec 2020 09:16:01 -0500 Received: from debbugs.gnu.org ([209.51.188.43]:36258) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1koSAL-0005tz-Nb for guix-patches@gnu.org; Sun, 13 Dec 2020 09:16:01 -0500 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1koSAL-0004I6-J9 for guix-patches@gnu.org; Sun, 13 Dec 2020 09:16:01 -0500 X-Loop: help-debbugs@gnu.org Subject: [bug#45020] [PATCH 0/2] image: Add system field. Resent-From: Ludovic =?UTF-8?Q?Court=C3=A8s?= Original-Sender: "Debbugs-submit" Resent-CC: guix-patches@gnu.org Resent-Date: Sun, 13 Dec 2020 14:16:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 45020 X-GNU-PR-Package: guix-patches X-GNU-PR-Keywords: patch To: zimoun Received: via spool by 45020-submit@debbugs.gnu.org id=B45020.160786895916484 (code B ref 45020); Sun, 13 Dec 2020 14:16:01 +0000 Received: (at 45020) by debbugs.gnu.org; 13 Dec 2020 14:15:59 +0000 Received: from localhost ([127.0.0.1]:47804 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1koSAJ-0004Ho-7X for submit@debbugs.gnu.org; Sun, 13 Dec 2020 09:15:59 -0500 Received: from eggs.gnu.org ([209.51.188.92]:32976) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1koSAH-0004Hb-2S for 45020@debbugs.gnu.org; Sun, 13 Dec 2020 09:15:57 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:35972) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1koSAB-0005rO-Tp; Sun, 13 Dec 2020 09:15:51 -0500 Received: from [2a01:e0a:1d:7270:af76:b9b:ca24:c465] (port=35616 helo=ribbon) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1koSAA-00037x-MV; Sun, 13 Dec 2020 09:15:51 -0500 From: Ludovic =?UTF-8?Q?Court=C3=A8s?= References: <20201203105353.149482-1-othacehe@gnu.org> <87eejw5lsn.fsf@gnu.org> <87h7orpgsh.fsf@gnu.org> <86im97fbjt.fsf@gmail.com> X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 23 Frimaire an 229 de la =?UTF-8?Q?R=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: Sun, 13 Dec 2020 15:15:49 +0100 In-Reply-To: <86im97fbjt.fsf@gmail.com> (zimoun's message of "Sat, 12 Dec 2020 13:34:14 +0100") Message-ID: <87pn3dzt9m.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: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: guix-patches@gnu.org List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mathieu Othacehe , 45020@debbugs.gnu.org Errors-To: guix-patches-bounces+larch=yhetil.org@gnu.org Sender: "Guix-patches" X-Migadu-Flow: FLOW_IN X-Migadu-Spam-Score: -2.80 Authentication-Results: aspmx1.migadu.com; dkim=none; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of guix-patches-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-patches-bounces@gnu.org X-Migadu-Queue-Id: 892959402A5 X-Spam-Score: -2.80 X-Migadu-Scanner: scn1.migadu.com X-TUID: 066hMNj2ukKe Hi! zimoun skribis: > On Sat, 12 Dec 2020 at 09:30, Mathieu Othacehe wrote: > >> When using Yocto, Buildroot or even OpenWrt, you say "build me an image >> for that board/machine" and not, "build me an image for that board by >> cross-compiling to this mysterious triplet". > > I confirm that the triplet is still mysterious to me. Since I do not do > that often, each time I am trying, I need to browse the doc, when I am > not asking again and again on IRC. The triplet is a stringy DSL to designate a CPU architecture, hardware vendor, and operating system; nowadays people often piggy-back information to distinguish =E2=80=9COS=E2=80=9D from =E2=80=9Ckernel=E2=80= =9D, to specify the ABI, etc. (info "(autoconf) Specifying Target Triplets"). It was designed at a time where things were quite different (nowadays the =E2=80=9Cvendor=E2=80=9D part is almost always useless), and it=E2=80= =99s primarily for userland software. It=E2=80=99s well-documented though, no mystery. ;-) Now, a triplet does not capture all the things we=E2=80=99re interested in,= like details of the boot-up sequence of the ARM board, preferred bootloader, Binutils tweaks, etc. >From a Guix System viewpoint, we could define an abstract architecture/platform/target as something that embodies the info contained in triplets and more, say: --8<---------------cut here---------------start------------->8--- ;; Description of a platform supported by the GNU system. (define-record-type* platform make-platform platform? (triplet platform-triplet) ;"x86_64-linux-gnu" (system-type platform-system-type) ;"x86_64-linux" (linux-architecture platform-linux-architecture) ;"amd64" (kernel platform-kernel) ; (ld.so platform-ld.so) ;"ld-linux-x86-64.so.2" (gcc platform-gcc) ; (binutils platform-binutils) ; (libc platform-transform-libc)) ; --8<---------------cut here---------------end--------------->8--- Currently that info is scattered in various pieces in Guix: in base.scm, cross-base.scm, linux.scm, bootstrap.scm, etc. Having all that in a single place would be an improvement. Of course this is going beyond what was originally discussed in this thread and I=E2=80=99m not claiming this is the solution to work on right n= ow. It might be a general direction to follow longer-term, though. Thoughts? Ludo=E2=80=99.