From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-477147-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 8130 invoked by alias); 13 Feb 2015 12:45:27 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 8081 invoked by uid 48); 13 Feb 2015 12:45:24 -0000
From: "conchur at web dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/65015] LTO produces randomly ordered debug information
Date: Fri, 13 Feb 2015 12:45:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: lto
X-Bugzilla-Version: 4.9.2
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: conchur at web dot de
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: attachments.isobsolete attachments.created
Message-ID: <bug-65015-4-p3a7yKRyR8@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-65015-4@http.gcc.gnu.org/bugzilla/>
References: <bug-65015-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2015-02/txt/msg01480.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65015

conchur at web dot de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #34746|0                           |1
        is obsolete|                            |

--- Comment #12 from conchur at web dot de ---
Created attachment 34747
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34747&action=edit
Mini Testcases

> Gold doesn't do that (thus, it works with -fuse-ld=gold).

Weird, my gnu gold 2.25-4 (debian version) still shows the symptoms:

SIMPLE-LINK: OK
SIMPLE-OBJDUMP: OK
SIMPLE-EXTERNAL-DEBUG: OK
BFD-LTO-LINK: FAIL
BFD-LTO-OBJDUMP: FAIL
BFD-LTO-EXTERNAL-DEBUG: FAIL
NOPART-BFD-LTO-LINK: OK
NOPART-BFD-LTO-OBJDUMP: OK
NOPART-BFD-LTO-EXTERNAL-DEBUG: OK
GOLD-LTO-LINK: FAIL
GOLD-LTO-OBJDUMP: FAIL
GOLD-LTO-EXTERNAL-DEBUG: FAIL
NOPART-GOLD-LTO-LINK: OK
NOPART-GOLD-LTO-OBJDUMP: OK
NOPART-GOLD-LTO-EXTERNAL-DEBUG: OK

Maybe you have a newer gold version installed which already includes a patch
which resolves this problem?

Diff of bfd:

221c221
<     41: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS ccsmMmrk.ltrans0.o
---
>     41: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS cctSjrTo.ltrans0.o

Diff of gold:

201c201
<     14: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS cc4lSDuA.ltrans0.o
---
>     14: 0000000000000000     0 FILE    LOCAL  DEFAULT  ABS ccxXItKB.ltrans0.o
245c245
<     Build ID: a9117c8c1852ec657a0cdd6e206427571bae9b31
---
>     Build ID: d65e429c3314089118f114fee1625276ef91835c