Linking error with protobuf 2.6.1 while building ignition-messages0 on ubuntu 16.04

[rishabh lal]

I am trying to build ign-msgs (version 0) from source which is a dependency for ignition transport 2 and gazebo 7. I installed protobuf from ubuntu repos and downloaded ign-msgs0 from bitbucket. 

The compilation &/or linking error I am facing is :-

Linking CXX executable ign_msgs_gen

CMakeFiles/ign_msgs_gen.dir/Generator.cc.o: In function `google::protobuf::compiler::cpp::Generator::Generate(google::protobuf::FileDescriptor const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, google::protobuf::compiler::GeneratorContext*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const':

/home/deadmanlogan/i_am_from_source/ign-msgs-0/src/Generator.cc:84: undefined reference to `google::protobuf::io::Printer::Print(char const*, char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'

/home/deadmanlogan/i_am_from_source/ign-msgs-0/src/Generator.cc:85: undefined reference to `google::protobuf::io::Printer::Print(char const*, char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'

/home/deadmanlogan/i_am_from_source/ign-msgs-0/src/Generator.cc:86: undefined reference to `google::protobuf::io::Printer::Print(char const*, char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'

/home/deadmanlogan/i_am_from_source/ign-msgs-0/src/Generator.cc:88: undefined reference to `google::protobuf::io::Printer::Print(char const*, char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'

/home/deadmanlogan/i_am_from_source/ign-msgs-0/src/Generator.cc:89: undefined reference to `google::protobuf::io::Printer::Print(char const*, char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'

CMakeFiles/ign_msgs_gen.dir/Generator.cc.o:/home/deadmanlogan/i_am_from_source/ign-msgs-0/src/Generator.cc:90: more undefined references to `google::protobuf::io::Printer::Print(char const*, char const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' follow

collect2: error: ld returned 1 exit status

src/CMakeFiles/ign_msgs_gen.dir/build.make:102: recipe for target 'src/ign_msgs_gen' failed

make[2]: *** [src/ign_msgs_gen] Error 1

CMakeFiles/Makefile2:343: recipe for target 'src/CMakeFiles/ign_msgs_gen.dir/all' failed

make[1]: *** [src/CMakeFiles/ign_msgs_gen.dir/all] Error 2

Makefile:162: recipe for target 'all' failed

make: *** [all] Error 2

 link for ign-msgs0 tarball 

https://bitbucket.org/ignitionrobotics/ign-msgs/src/ign-msgs0/

Please shine some light on this issue.

[Adam Cozzette]

I suspect this is a C++11 ABI compatibility issue. It looks like ign-msgs is being built for C++11 but libprotobuf as packaged by Ubuntu was likely built for C++03.

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[rishabh lal]

Solved this by linking with protobuf 3.7, just linked in cmakelists.txt , Generator.cc with "protobuf::libprotoc protobuf::libprotobuf".