Debian Bug report logs - #791050
glibmm2.4: library transition may be needed when GCC 5 is the default

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Message #5 received at maintonly@bugs.debian.org (full text, mbox, reply):

From: Matthias Klose <doko@debian.org>

To: maintonly@bugs.debian.org

Subject: glibmm2.4: library transition may be needed when GCC 5 is the default

Date: Fri, 03 Jul 2015 13:10:08 +0000

Package: src:glibmm2.4
Version: 2.44.0-1
Severity: important
Tags: sid stretch
User: debian-gcc@lists.debian.org
Usertags: libstdc++-cxx11

Background [1]: libstdc++6 introduces a new ABI to conform to the
C++11 standard, but keeps the old ABI to not break existing binaries.
Packages which are built with g++-5 from experimental (not the one
from testing/unstable) are using the new ABI.  Libraries built from
this source package export some of the new __cxx11 or B5cxx11 symbols,
and dropping other symbols.  If these symbols are part of the API of
the library, then this rebuild with g++-5 will trigger a transition
for the library.

What is needed:

 - Rebuild the library using g++/g++-5 from experimental. Note that
   most likely all C++ libraries within the build dependencies need
   a rebuild too. You can find the log for a rebuild in
     https://people.debian.org/~doko/logs/gcc5-20150701/
   Search for "BEGIN GCC CXX11" in the log.

 - Decide if the symbols matching __cxx11 or B5cxx11 are part of the
   library API, and are used by the reverse dependencies of the
   library.

 - If there are no symbols matching __cxx11 or B5cxx11 in the symbols
   forming the library API, you should close this issue with a short
   explanation.
 
 - If there are no reverse dependencies, it should be the package
   maintainers decision if a transition is needed.  However this might
   break software which is not in the Debian archive, and built
   against these packages.

 - If a library transition is needed, please prepare for the change.
   Rename the library package, append "v5" to the name of the package
   (e.g. libfoo2 -> libfoo2v5). Such a change can be avoided, if you
   have a soversion bump and you upload this version instead of the
   renamed package.  Prepare a patch and attach it to this issue (mark
   this issue with patch), so that it is possible to NMU such a
   package. We'll probably have more than hundred transitions
   triggered. Then reassign the issue to release.debian.org and
   properly tag it as a transition issue, by sending an email to
   control@bugs.debian.org:
   
     user release.debian.org@packages.debian.org
     usertag <this issue> + transition
     block <this issue> by 790756
     reassign <this issue> release.debian.org
   
 - If unsure if a transition is needed, please tag the issue with help
   to ask for feedback from other Debian developers.

The libstdc++6 transition will be a large one, and it will come with a
lot of pain.  Please help it by preparing the follow-up transitions.

[1] https://wiki.debian.org/GCC5#libstdc.2B-.2B-_ABI_transition

Message #10 received at 791050@bugs.debian.org (full text, mbox, reply):

From: Matthias Klose <doko@debian.org>

To: 791050@bugs.debian.org

Subject: Re: glibmm2.4: library transition may be needed when GCC 5 is the default

Date: Tue, 14 Jul 2015 08:15:57 +0200

Control: tags -1 + confirmed

confirmed, or else at least performous ftbfs.

Message #23 received at 791050-maintonly@bugs.debian.org (full text, mbox, reply):

From: Sebastien Bacher <seb128@ubuntu.com>

To: 791050-maintonly@bugs.debian.org, control@bugs.debian.org

Subject: re: glibmm2.4: library transition may be needed when GCC 5 is the default

Date: Thu, 30 Jul 2015 15:35:44 +0200

[Message part 1 (text/plain, inline)]

user release.debian.org@packages.debian.org
usertag 791050 + transition origin-ubuntu wily ubuntu-patch
block 791050 by 790756
reassign 791050 release.debian.org
thanks

There are some symbols changes so a rename is required, attached is a
debdiff prepared for Ubuntu and that should work for Debian as well

Cheers,
Sebastien Bacher

[glibmm2.4_2.45.41-0ubuntu1_2.45.41-0ubuntu3~gcc5.2.diff (text/x-diff, attachment)]

Message #32 received at 791050@bugs.debian.org (full text, mbox, reply):

From: Michael Biebl <biebl@debian.org>

To: debian-release@lists.debian.org, 791050@bugs.debian.org

Cc: seb128@ubuntu.com

Subject: Re: Bug#791050: glibmm2.4: library transition may be needed when GCC 5 is the default

Date: Thu, 6 Aug 2015 17:14:37 +0200

[Message part 1 (text/plain, inline)]

Am 30.07.2015 um 15:35 schrieb Sebastien Bacher:
> user release.debian.org@packages.debian.org
> usertag 791050 + transition origin-ubuntu wily ubuntu-patch
> block 791050 by 790756
> reassign 791050 release.debian.org
> thanks
> 
> There are some symbols changes so a rename is required, attached is a
> debdiff prepared for Ubuntu and that should work for Debian as well

While the debdiff itself didn't apply, I've extracted the relevant bits
and uploaded to experimental.

The buildd results look fine so far [1].

There is no auto-tracker yet, will probably take a few more hours to
show up.

Please let me know, when I can proceed with the upload to unstable.

cheers,
Michael

[1]
https://buildd.debian.org/status/package.php?p=glibmm2.4&suite=experimental


-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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Message #37 received at 791050@bugs.debian.org (full text, mbox, reply):

From: Matthias Klose <doko@debian.org>

To: Michael Biebl <biebl@debian.org>, debian-release@lists.debian.org, 791050@bugs.debian.org

Cc: seb128@ubuntu.com

Subject: Re: Bug#791050: glibmm2.4: library transition may be needed when GCC 5 is the default

Date: Sat, 08 Aug 2015 07:46:25 +0200

On 08/06/2015 05:14 PM, Michael Biebl wrote:
> Please let me know, when I can proceed with the upload to unstable.

https://lists.debian.org/debian-devel-announce/2015/08/msg00000.html

Michael, you can directly upload to unstable, unless there not yet transitioned
or not yet confirmed build dependencies.

Message #46 received at 791050-done@bugs.debian.org (full text, mbox, reply):

From: Julien Cristau <jcristau@debian.org>

To: Matthias Klose <doko@debian.org>, 791050-done@bugs.debian.org

Subject: Re: Bug#791050: glibmm2.4: library transition may be needed when GCC 5 is the default

Date: Mon, 21 Sep 2015 08:24:34 +0200

[Message part 1 (text/plain, inline)]

On Fri, Jul  3, 2015 at 13:10:08 +0000, Matthias Klose wrote:

> Package: src:glibmm2.4
> Version: 2.44.0-1
> Severity: important
> Tags: sid stretch
> User: debian-gcc@lists.debian.org
> Usertags: libstdc++-cxx11
> 
libglibmm-2.4-1c2a is no longer in testing, closing.

Cheers,
Julien

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