Bug#791044: geographiclib: library transition may be needed when GCC 5 is the default

2015-08-03 Thread Sebastiaan Couwenberg
On 03-08-15 14:40, Sebastiaan Couwenberg wrote:
> On 19-07-15 20:40, Sebastiaan Couwenberg wrote:
>> On 07/03/2015 03:10 PM, Matthias Klose wrote:
>>>  - 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.
>>
>> Just like pktools (#791240), geographic lib doesn't have any reverse
>> dependencies. We'll only need to update the symbols on all architectures
>> when the new libstdc++ is moved to unstable.
> 
> It's currently not possible to build liblas due to uninstallable
> dependencies, anything build depending on gdal will pull in libdap which
> libstdc++ breaks.

This is not the liblas bugreport, and fortunately geographiclib is not
affects by uninstallable build dependencies, so I've uploaded
geographiclib (1.43-3~exp1) to experimental with updates symbols for
amd64 with GCC 5, I'll upload it to unstable after updating the symbols
for the other architectures.

Kind Regards,

Bas

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Bug#791044: geographiclib: library transition may be needed when GCC 5 is the default

2015-08-03 Thread Sebastiaan Couwenberg
On 19-07-15 20:40, Sebastiaan Couwenberg wrote:
> On 07/03/2015 03:10 PM, Matthias Klose wrote:
>>  - 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.
> 
> Just like pktools (#791240), geographic lib doesn't have any reverse
> dependencies. We'll only need to update the symbols on all architectures
> when the new libstdc++ is moved to unstable.

It's currently not possible to build liblas due to uninstallable
dependencies, anything build depending on gdal will pull in libdap which
libstdc++ breaks.

Kind Regards,

Bas

-- 
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Bug#791044: geographiclib: library transition may be needed when GCC 5 is the default

2015-07-19 Thread Sebastiaan Couwenberg
On 07/03/2015 03:10 PM, Matthias Klose wrote:
>  - 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.

Just like pktools (#791240), geographic lib doesn't have any reverse
dependencies. We'll only need to update the symbols on all architectures
when the new libstdc++ is moved to unstable.

Kind Regards,

Bas

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Bug#791044: geographiclib: library transition may be needed when GCC 5 is the default

2015-07-03 Thread Matthias Klose
Package: src:geographiclib
Version: 1.43-1
Severity: important
Tags: sid stretch
User: debian-...@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
   cont...@bugs.debian.org:
   
 user release.debian@packages.debian.org
 usertag  + transition
 block  by 790756
 reassign  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

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