From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark H Weaver Subject: Re: Starting 'core-updates' Date: Tue, 01 May 2018 17:21:35 -0400 Message-ID: <877eon2hsw.fsf@netris.org> References: <8736zp571h.fsf@netris.org> <871sf7hv7o.fsf@gnu.org> <877eoxaj01.fsf@fastmail.com> <87po2ntreb.fsf@gnu.org> <87lgd3h3c5.fsf@fastmail.com> <20180501142320.GA14610@jasmine.lan> <87zi1j5j6n.fsf@netris.org> <87lgd3nlxj.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:48447) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fDcjR-0004Ed-4R for guix-devel@gnu.org; Tue, 01 May 2018 17:22:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fDcjN-0006Fp-1r for guix-devel@gnu.org; Tue, 01 May 2018 17:22:41 -0400 In-Reply-To: <87lgd3nlxj.fsf@gnu.org> ("Ludovic \=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\= \=\?utf-8\?Q\?s\?\= message of "Tue, 01 May 2018 22:46:48 +0200") List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: "Guix-devel" To: Ludovic =?utf-8?Q?Court=C3=A8s?= Cc: guix-devel@gnu.org Hi Ludovic, ludo@gnu.org (Ludovic Court=C3=A8s) writes: > Besides, what makes you think grafting doesn=E2=80=99t work properly on m= aster? Because of bug 30820: the default GCC on our master branch sometimes incorporates string literals containing store references directly into the generated x86 code, broken up into 8-byte chunks within immediate load instructions, which cannot be rewritten by our grafting code. This issue was fixed on core-updates only. The fix fundamentally requires a full rebuild, so it cannot be done on master. https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D30820#51 Mark