From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark H Weaver Subject: Re: Meltdown / Spectre Date: Sun, 21 Jan 2018 11:26:09 -0500 Message-ID: <87o9lnmb4u.fsf@netris.org> References: <874lnzcedp.fsf@gmail.com> <20180106174358.GA28436@jasmine.lan> <87vageeobi.fsf@netris.org> <87incedvgv.fsf@netris.org> <87k1wtcq7m.fsf@netris.org> <87wp0qognk.fsf@gmail.com> <20180110045930.GA29390@jasmine.lan> <87po6a841k.fsf@gnu.org> <87bmhph5b2.fsf@netris.org> <20180120001759.GE18016@jasmine.lan> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:53657) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1edIU3-00042L-0K for guix-devel@gnu.org; Sun, 21 Jan 2018 11:28:40 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1edITy-0001pl-3b for guix-devel@gnu.org; Sun, 21 Jan 2018 11:28:39 -0500 Received: from world.peace.net ([50.252.239.5]:50004) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1edITx-0001pW-Ua for guix-devel@gnu.org; Sun, 21 Jan 2018 11:28:34 -0500 In-Reply-To: <20180120001759.GE18016@jasmine.lan> (Leo Famulari's message of "Fri, 19 Jan 2018 16:17:59 -0800") 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: Leo Famulari Cc: guix-devel@gnu.org Leo Famulari writes: > On Fri, Jan 19, 2018 at 05:06:25PM -0500, Mark H Weaver wrote: >> There's now a GCC 7.3 release candidate that apparently contains the >> necessary compiler support to allow linux-libre-4.14.14 to use the >> retpoline technique internally. >> >> https://gcc.gnu.org/ml/gcc/2018-01/msg00115.html >> >> They hope to release GCC 7.3 on January 24th. It would be good to >> promptly add GCC 7.3 to Guix when its released, and to start using it to >> build linux-libre-4.14 on selected systems: x86_64 and possibly aarch64. >> >> I'd prefer to continue using our default compiler to build linux-libre >> on systems where GCC 7.3 is not known to help with this issue. > > Thanks for looking into this, Mark. Your plan sounds good to me. FYI, in another thread, I recently posted preliminary patches to add the GCC 7.3 release candidate as a Guix package, and to use it to build linux-libre on x86_64 and i686 systems: https://lists.gnu.org/archive/html/guix-devel/2018-01/msg00292.html Mark