Created attachment 426096 [details] ignition-transport build log said package (needed as prerequisite for gazebo) fails with these famous last words on our build system. THe complete build.log is attached .... CMakeFiles/UNIT_AdvertiseOptions_TEST.dir/__/msgs/vector3d.pb.cc.o: In function `ignition::transport::msgs::protobuf_AssignDesc_vector3d_2eproto()': /var/tmp/portage/net-libs/ignition-transport-1.0.1/work/ignition-transport-1.0.1_build/msgs/vector3d.pb.cc:36: undefined reference to `google::protobuf::DescriptorPool::FindFileByName(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const' CMakeFiles/UNIT_AdvertiseOptions_TEST.dir/__/msgs/vector3d.pb.cc.o:(.data.rel.ro._ZTVN8ignition9transport4msgs8Vector3dE[_ZTVN8ignition9transport4msgs8Vector3dE]+0x20): undefined reference to `google::protobuf::Message::GetTypeName[abi:cxx11]() const' CMakeFiles/UNIT_AdvertiseOptions_TEST.dir/__/msgs/vector3d.pb.cc.o:(.data.rel.ro._ZTVN8ignition9transport4msgs8Vector3dE[_ZTVN8ignition9transport4msgs8Vector3dE]+0x40): undefined reference to `google::protobuf::Message::InitializationErrorString[abi:cxx11]() const' libignition-transport1.so.1.0.1: undefined reference to `google::protobuf::MessageLite::SerializeToString(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*) const' collect2: error: ld returned 1 exit status src/CMakeFiles/UNIT_AdvertiseOptions_TEST.dir/build.make:148: recipe for target 'src/UNIT_AdvertiseOptions_TEST' failed make[2]: *** [src/UNIT_AdvertiseOptions_TEST] Error 1 make[2]: Leaving directory '/var/tmp/portage/net-libs/ignition-transport-1.0.1/work/ignition-transport-1.0.1_build' CMakeFiles/Makefile2:244: recipe for target 'src/CMakeFiles/UNIT_AdvertiseOptions_TEST.dir/all' failed make[1]: *** [src/CMakeFiles/UNIT_AdvertiseOptions_TEST.dir/all] Error 2 make[1]: Leaving directory '/var/tmp/portage/net-libs/ignition-transport-1.0.1/work/ignition-transport-1.0.1_build' Makefile:138: recipe for target 'all' failed make: *** [all] Error 2 * ERROR: net-libs/ignition-transport-1.0.1::gentoo failed (compile phase): * emake failed inspecting the build log, there are some issues announcing problems: -- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE) maybe doxygen should be a prerequisite, or make it depending on some "doc" USE-flag. results later in -- BUILD WARNINGS -- ignition-tools not found, for command line utilities, please install ignition-tools. -- END BUILD WARNINGS Package also seems to have some cmake issues: CMake Warning at cmake/SearchForStuff.cmake:90 (find_package): By not providing "Findignition-tools.cmake" in CMAKE_MODULE_PATH this project has asked CMake to find a package configuration file provided by "ignition-tools", but CMake did not find one. Could not find a package configuration file provided by "ignition-tools" with any of the following names: ignition-toolsConfig.cmake ignition-tools-config.cmake Add the installation prefix of "ignition-tools" to CMAKE_PREFIX_PATH or set "ignition-tools_DIR" to a directory containing one of the above files. If "ignition-tools" provides a separate development package or SDK, be sure it has been installed. Call Stack (most recent call first): CMakeLists.txt:136 (include)
Created attachment 426098 [details] emerge --info
those warnings can be ignored, as for the build error, i think you have not followed gcc5 upgrade guide and you need to rebuild protobuf with gcc5: https://wiki.gentoo.org/wiki/Upgrading_from_gcc-4.x_to_gcc-5.x
