From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-patches-return-503352-listarch-gcc-patches=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 36257 invoked by alias); 20 Jun 2019 11:42:52 -0000
Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-patches.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>
List-Post: <mailto:gcc-patches@gcc.gnu.org>
List-Help: <mailto:gcc-patches-help@gcc.gnu.org>
Sender: gcc-patches-owner@gcc.gnu.org
Received: (qmail 35721 invoked by uid 89); 20 Jun 2019 11:42:52 -0000
Authentication-Results: sourceware.org; auth=none
X-Spam-SWARE-Status: No, score=-4.2 required=5.0 tests=AWL,BAYES_00,SPF_PASS autolearn=ham version=3.3.1 spammy=H*i:sk:122f53d, H*f:sk:122f53d, HTo:U*pinskia, HContent-Transfer-Encoding:8bit
X-HELO: mx1.suse.de
Received: from mx2.suse.de (HELO mx1.suse.de) (195.135.220.15) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Thu, 20 Jun 2019 11:42:51 +0000
Received: from relay2.suse.de (unknown [195.135.220.254])	by mx1.suse.de (Postfix) with ESMTP id 5EDF2AAA8;	Thu, 20 Jun 2019 11:42:49 +0000 (UTC)
Subject: Re: [RFC] zstd as a compression algorithm for LTO
To: Thomas Koenig <tkoenig@netcologne.de>, Andrew Pinski <pinskia@gmail.com>, Jan Hubicka <hubicka@ucw.cz>
Cc: Richard Biener <richard.guenther@gmail.com>, Jeff Law <law@redhat.com>, GCC Development <gcc@gcc.gnu.org>, GCC Patches <gcc-patches@gcc.gnu.org>
References: <89e98dc0-e766-ffef-da0f-263c3b284e96@suse.cz> <ecf95d2c-bc83-1fef-3d0d-74db34d7f1ea@redhat.com> <1BBDAEDD-9432-4B12-BA20-63A6E047FDB6@gmail.com> <CA+=Sn1kaGR00rtVXDtDufk-68reSZC-K-y_a5O7UMoSH+YD1oQ@mail.gmail.com> <20190619192954.edwdfxns3gx2gt5m@kam.mff.cuni.cz> <CA+=Sn1np4H884eXM7H4LKeDj5Xppdy9y0WRbnbCqhhheUdjqyA@mail.gmail.com> <b33b7076-edf2-8e12-3661-704c02b2d167@suse.cz> <122f53d2-5ae0-b801-81ab-36ce69f9efda@netcologne.de>
From: =?UTF-8?Q?Martin_Li=c5=a1ka?= <mliska@suse.cz>
Message-ID: <9417a329-c71c-4682-872c-60ff3524c47e@suse.cz>
Date: Thu, 20 Jun 2019 11:42:00 -0000
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.1
MIME-Version: 1.0
In-Reply-To: <122f53d2-5ae0-b801-81ab-36ce69f9efda@netcologne.de>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
X-IsSubscribed: yes
X-SW-Source: 2019-06/txt/msg01219.txt.bz2

On 6/20/19 12:58 PM, Thomas Koenig wrote:
> Am 20.06.19 um 11:07 schrieb Martin Liška:
>> On the contrary, decompression
>> of zstd with zlib will end with:
>> lto1: internal compiler error: compressed stream: data error
> 
> Sogenerating object files on one system and trying to read them
> on another system which does not happen to have a particular
> library installed would lead to failure?  If that's the case,
> I am not sure that this is a good way of handling things.

Yes, but LTO bytecode is not supposed to be a distributable format.

Martin