Ubuntu
binutils package

c++ -flto always results in unresolved symbols

Bug #872687 reported by Tom Vijlbrief
10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
binutils
Fix Released
Medium
binutils (Ubuntu)
Fix Released
High
Unassigned
Oneiric
Fix Released
High
Unassigned

Bug Description

TEST CASE
=======main.cc =====
int main() {}
===================

c++ -flto main.cc

EXPECTED RESULT:
Builds fine

WHAT HAPPENS:
results in unresolved symbol errors on latest oneiric beta

WORKAROUND
Adding -static is a work around

See original description
Revision history for this message
In , Matthias Klose (doko) wrote :

seen with the 2.22 branch (and the fix for pr13250 applied), works with gold, gcc is 4.6 from the branch.

$ cat foo.cc
int main() {}

$ g++ -B/usr/lib/gold-ld/ -Wl,--as-needed -flto foo.cc
ok

$ $ gcc -Wl,--as-needed -flto foo.cc
ok

$ $ g++ -Wl,--as-needed -flto foo.cc
/lib/i386-linux-gnu/libc.so.6: undefined reference to `_dl_argv@GLIBC_PRIVATE'
/lib/i386-linux-gnu/libc.so.6: undefined reference to `__libc_stack_end@GLIBC_2.1'
/lib/i386-linux-gnu/libc.so.6: undefined reference to `__libc_enable_secure@GLIBC_PRIVATE'
/lib/i386-linux-gnu/libc.so.6: undefined reference to `_rtld_global@GLIBC_PRIVATE'
/lib/i386-linux-gnu/libc.so.6: undefined reference to `___tls_get_addr@GLIBC_2.3'
/lib/i386-linux-gnu/libc.so.6: undefined reference to `_rtld_global_ro@GLIBC_PRIVATE'
collect2: ld returned 1 exit status

Revision history for this message
Matthias Klose (doko) wrote :

better work arounds are

 - use -Wl,--no-as-needed
 - use gold (-B/usr/lib/gold-ld/)

affects: gcc-defaults (Ubuntu) → binutils (Ubuntu)
Changed in binutils (Ubuntu):
importance: Undecided → High
status: New → Confirmed
Bug Watch Updater (bug-watch-updater)
Changed in binutils:
importance: Unknown → Medium
status: Unknown → Confirmed
Revision history for this message
In , Matthias Klose (doko) wrote :

also seen on the trunk.

glibc-2.13 or glibc trunk doesn't make a difference

Revision history for this message
In , Hjl-tools (hjl-tools) wrote :

It is a regression.

Revision history for this message
In , Hjl-tools (hjl-tools) wrote :

It is caused by

http://sourceware.org/ml/binutils/2011-09/msg00121.html

Revision history for this message
In , Cvs-commit (cvs-commit) wrote :

CVSROOT: /cvs/src
Module name: src
Changes by: <email address hidden> 2011-10-20 09:50:59

Modified files:
 ld : ChangeLog plugin.c plugin.h ldlang.c

Log message:
 PR ld/13287
 * plugin.c (plugin_should_reload): New function.
 * plugin.h (plugin_should_reload): Declare.
 * ldlang.c (open_input_bfds): Use above function.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/ChangeLog.diff?cvsroot=src&r1=1.2383&r2=1.2384
http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/plugin.c.diff?cvsroot=src&r1=1.42&r2=1.43
http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/plugin.h.diff?cvsroot=src&r1=1.9&r2=1.10
http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/ldlang.c.diff?cvsroot=src&r1=1.378&r2=1.379

Matthias Klose (doko)
Changed in binutils (Ubuntu Oneiric):
importance: Undecided → High
status: New → Confirmed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package binutils - 2.21.90.20111019-2ubuntu1

---------------
binutils (2.21.90.20111019-2ubuntu1) precise; urgency=low

  * Merge with Debian.

binutils (2.21.90.20111019-2) unstable; urgency=low

  * Fix PR ld/13287, taken from the trunk. LP: #872687.

binutils (2.21.90.20111019-1) unstable; urgency=low

  * Snapshot, taken from the binutils-2_22-branch 20111019.
 -- Matthias Klose <email address hidden> Thu, 20 Oct 2011 13:12:50 +0200

Changed in binutils (Ubuntu):
status: Confirmed → Fix Released
Bug Watch Updater (bug-watch-updater)
Changed in binutils:
status: Confirmed → In Progress
Revision history for this message
In , Cvs-commit (cvs-commit) wrote :

CVSROOT: /cvs/src
Module name: src
Branch: binutils-2_22-branch
Changes by: <email address hidden> 2011-10-25 03:15:08

Modified files:
 ld : ChangeLog ldlang.c plugin.c plugin.h

Log message:
 PR ld/13287
 2011-10-20 Alan Modra <email address hidden>
 * plugin.c (plugin_should_reload): New function.
 * plugin.h (plugin_should_reload): Declare.
 * ldlang.c (open_input_bfds): Use above function.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/ChangeLog.diff?cvsroot=src&only_with_tag=binutils-2_22-branch&r1=1.2373.2.6&r2=1.2373.2.7
http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/ldlang.c.diff?cvsroot=src&only_with_tag=binutils-2_22-branch&r1=1.378&r2=1.378.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/plugin.c.diff?cvsroot=src&only_with_tag=binutils-2_22-branch&r1=1.40.2.2&r2=1.40.2.3
http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/plugin.h.diff?cvsroot=src&only_with_tag=binutils-2_22-branch&r1=1.9&r2=1.9.2.1

Revision history for this message
In , Alan Modra (amodra-gmail) wrote :

Fixed.

Revision history for this message
Martin Pitt (pitti) wrote : Please test proposed package

Hello Tom, or anyone else affected,

Accepted binutils into oneiric-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

Changed in binutils (Ubuntu Oneiric):
status: Confirmed → Fix Committed
tags: added: verification-needed
Bug Watch Updater (bug-watch-updater)
Changed in binutils:
status: In Progress → Fix Released
Revision history for this message
Tom Vijlbrief (tvijlbrief) wrote :

Hi Martin

I installed the binutils from proposed and build the StockFish chess program
(which failed to build initially) with -flto and also
combined with the PGO build option.

No problems, the new binutils works just fine!

Jean-Baptiste Lallement (jibel)
description: updated
tags: added: verification-done
removed: verification-needed
tags: added: testcase
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package binutils - 2.21.53.20110810-0ubuntu5

---------------
binutils (2.21.53.20110810-0ubuntu5) oneiric-proposed; urgency=low

  * Fix PR ld/13287, taken from the trunk. LP: #872687.
 -- Matthias Klose <email address hidden> Thu, 20 Oct 2011 15:13:07 +0200

Changed in binutils (Ubuntu Oneiric):
status: Fix Committed → Fix Released
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