Bug#874727: OSG changing VRML renderer away from coin3

[Sebastiaan Couwenberg]

On 11/5/18 12:45 AM, Manuel A. Fernandez Montecelo wrote:
> 2018-11-04 18:28 Christoph Berg:
>> Re: To markus 2018-10-05 <20181005080326.GB13732 at msg.df7cb.de>
>>> > it's a packaging bug - libcoin is statically linked with libexpat, and
>>> > the version being used is outdated. So anything that uses libcoin and
>>> > libexpat will run into a segfault.
>>> >
>>> > I am not aware of any other application that uses libcoin.
>>>
>>> I noticed because PostGIS is affected via postgis B-D -> libsfcgal-dev
>>> -> libsfcgal-osg1 -> libopenscenegraph100v5 -> libcoin80v5. Looking at
>>> https://udd.debian.org/cgi-bin/autoremovals.cgi there's quite a few
>>> packages depending on coin3. So the question whether this affects
>>> freecad only or more packages is making quite a difference.
>>
>> There is some indirect progress on this, Sebastiaan Couwenberg has
>> submitted patches to change OSG's VRML renderer to SGI Inventor:
>>
>> | Patches for both OSG packages have been submitted to use SGI Inventor
>> | instead of COIN:
>> |
>> |  https://bugs.debian.org/912866 (openscenegraph)
>> |  https://bugs.debian.org/912867 (openscenegraph-3.4)
> 
> I am not totally opposed to that, and thanks to Bas for the patches.
> But it looks to me that the proper solution is something like what
> Bernhard posted just minutes before this message that I am replying to
> (that perhaps Christoph didn't notice, due to the timing):
> 
>  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=874727#96

Yes, the proper solution is to fix coin3. The OSG patches are meant as
an interim solution to remove the coin3 dependency from the OSG packages
and remove the threat of testing autoremoval.

OSG will also need to be patched to support the CMake builds of coin3,
so more work is needed to get OSG to work with the fixed coin3.

Kind Regards,

Bas

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