compile "gazebo_ros” packages fail,a lot of probuf error，please help me

[panrucheng5013]

at ubuntu 20.4 ,ros2 foxy sources version,gazebo11, I clone the “gazebo_ros_pkgs" source project to build，all packages compiled sucessfully except "gazebo_ros" packages，it displays the following error message: error: ‘google::protobuf::uint8 gazebo::msgs::PoseAnimation::InternalSerializeWithCachedSizesToArray(bool, google::protobuf::uint8) const’ marked ‘final’, but is not virtual 145 | ::google::protobuf::uint8* InternalSerializeWithCachedSizesToArray( | ^~~~~~~~~~~ In file included from /usr/include/google/protobuf/message_lite.h:49, from /usr/include/google/protobuf/generated_enum_util.h:36, from /usr/include/google/protobuf/map.h:49, from /usr/include/google/protobuf/generated_message_table_driven.h:34, from /usr/include/gazebo-11/gazebo/msgs/poses_stamped.pb.h:25, from /usr/include/gazebo-11/gazebo/physics/PhysicsTypes.hh:26, from /usr/include/gazebo-11/gazebo/common/Plugin.hh:41, from /home/panrucheng/gazebo_ws/src/gazebo_ros_pkgs/gazebo_ros/src/gazebo_ros_properties.cpp:15:

/usr/include/gazebo-11/gazebo/msgs/link.pb.h: In member function ‘google::protobuf::UnknownFieldSet* gazebo::msgs::Link::mutable_unknown_fields()’: /usr/include/gazebo-11/gazebo/msgs/link.pb.h:113:55: error: no matching function for call to ‘google::protobuf::internal::InternalMetadata::mutable_unknown_fields()’ 113 | return _internalmetadata.mutable_unknown_fields(); | ^ In file included from /usr/include/google/protobuf/message_lite.h:49, from /usr/include/google/protobuf/generated_enum_util.h:36, from /usr/include/google/protobuf/map.h:49, from /usr/include/google/protobuf/generated_message_table_driven.h:34, from /usr/include/gazebo-11/gazebo/msgs/poses_stamped.pb.h:25, from /usr/include/gazebo-11/gazebo/physics/PhysicsTypes.hh:26, from /usr/include/gazebo-11/gazebo/common/Plugin.hh:41, from /home/panrucheng/gazebo_ws/src/gazebo_ros_pkgs/gazebo_ros/src/gazebo_ros_properties.cpp:15: .... a large number of probuf error messages, when i reinstall "libgazebo11-dev" and “”libprotobuf-dev" ,it still show this probuf error

[talregev]

Happen for me also. I think this repo is not maintain anymore. This error occur due the fact that the protobuf is updated to 3.12.4, and this package that compile with protobuf, didn't update accordingly. https://lists.fedoraproject.org/archives/list/robotics@lists.fedoraproject.org/thread/3RM37X2WPUMJIW7Y2LZ4TNQ4A6I6EEZE/ https://www.spinics.net/linux/fedora/fedora-robotics/msg00492.html

[panrucheng5013]

Happen for me also. I think this repo is not maintain anymore. This error occur due the fact that the protobuf is updated to 3.12.4, and this package that compile with protobuf, didn't update accordingly. https://lists.fedoraproject.org/archives/list/robotics@lists.fedoraproject.org/thread/3RM37X2WPUMJIW7Y2LZ4TNQ4A6I6EEZE/ https://www.spinics.net/linux/fedora/fedora-robotics/msg00492.html

Thanks a lot,I rebuild the system protobuf version 3.6.1 to solve it