Gazebo 11 problem with protobuf version (3.12.4)

[Eric Masseran]

Hi,

I am using gazebo on Fedora 33, I installed the version 11 from
https://copr.fedorainfracloud.org/coprs/g/robotics-sig/gazebo-latest/.

As I was following this tutorial to make a plugin (
http://gazebosim.org/tutorials?tut=plugins_hello_world&cat=write_plugin) I
got a compilation error:
```
      |
AuxillaryParseTableField
Dans le fichier inclus depuis
/usr/include/gazebo-11/gazebo/msgs/MessageTypes.hh:135,
                 depuis /usr/include/gazebo-11/gazebo/msgs/msgs.hh:35,
                 depuis /usr/include/gazebo-11/gazebo/gazebo_core.hh:20,
                 depuis /usr/include/gazebo-11/gazebo/gazebo.hh:20,
                 depuis
/home/eric/GitGalaxy/robotics/gazebo/plugin_tutorial/hello_world.cc:1:
/usr/include/gazebo-11/gazebo/msgs/wrench_stamped.pb.h:58:51: erreur:
« AuxiliaryParseTableField » dans l'espace de noms
« google::protobuf::internal » ne nomme pas un type; vouliez-vous utiliser
« AuxillaryParseTableField » ?
   58 |   static const
::PROTOBUF_NAMESPACE_ID::internal::AuxiliaryParseTableField aux[]
      |
^~~~~~~~~~~~~~~~~~~~~~~~
      |
AuxillaryParseTableField
```

After investigating, it seems that it is a protobuf problem.

This commit changed the spelling involved in the error:
https://github.com/protocolbuffers/protobuf/commit/2ae7cf0e03c3469973e592e81...

The commit is tagged with the version 3.12.3 (the version probably used for
the gazebo compilation). However, the tagging was wrong for 3.12.X and
should not include this commit. So the team released a 3.12.4 version
without this commit and some others. (
https://github.com/protocolbuffers/protobuf/issues/7632#issuecomment-6667645...
)

Right now Fedora 33 has the protobuf version 3.12.4 in the official
repository so it seems incompatible.

So, my question is it possible to build the packages again in
https://copr.fedorainfracloud.org/coprs/g/robotics-sig/gazebo-latest with
the actual protobuf version in F33 repository (3.12.4) ?

Regards,
Eric

[Rich Mattes]

On 12/27/20 10:38 AM, Eric Masseran wrote:
> Right now Fedora 33 has the protobuf version 3.12.4 in the official 
> repository so it seems incompatible.
>
> So, my question is it possible to build the packages again in 
> https://copr.fedorainfracloud.org/coprs/g/robotics-sig/gazebo-latest 
> https://copr.fedorainfracloud.org/coprs/g/robotics-sig/gazebo-latest 
> with the actual protobuf version in F33 repository (3.12.4) ?

Hi Eric,

Your investigation is correct - we ran into this problem in the main 
fedora repositories, but I neglected to rebuild the packages in the 
copr.  I'm initiating rebuilds now, it hopefully won't be too long 
before the updated packages are available.

Thanks,

Rich

[Eric Masseran]

Hi Rich,

Thank you very much for your support. Some packages have been rebuilt and
available (ignition-msgs, ignition-transport...) but others are still not
(Gazebo, ignition-common). As a result, the plugin compilation is still not
possible.

Regards,
Eric

Le sam. 2 janv. 2021 à 00:09, Rich Mattes  a écrit :
> On 12/27/20 10:38 AM, Eric Masseran wrote:
> > Right now Fedora 33 has the protobuf version 3.12.4 in the official
> > repository so it seems incompatible.
> >
> > So, my question is it possible to build the packages again in
> > https://copr.fedorainfracloud.org/coprs/g/robotics-sig/gazebo-latest
> > https://copr.fedorainfracloud.org/coprs/g/robotics-sig/gazebo-latest
> > with the actual protobuf version in F33 repository (3.12.4) ?
>
> Hi Eric,
>
> Your investigation is correct - we ran into this problem in the main
> fedora repositories, but I neglected to rebuild the packages in the
> copr.  I'm initiating rebuilds now, it hopefully won't be too long
> before the updated packages are available.
>
> Thanks,
>
> Rich
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