Build Error Glog

[Göktuğ Yıldırım]

When I try to use g2o::EdgeSE3ProjectXYZOnlyPose with the version of the last release, I face the build error. Do you have any idea?

/usr/bin/ld: CMakeFiles/g2o_optimizers.dir/src/only_pose_ba_solver.cpp.o: in functionceres::internal::FixedArray<double, 6ul, std::allocator >::operator[](unsigned long)':
only_pose_ba_solver.cpp:(.text._ZN5ceres8internal10FixedArrayIdLm6ESaIdEEixEm[_ZN5ceres8internal10FixedArrayIdLm6ESaIdEEixEm]+0xad): undefined reference to google::LogMessageFatal::LogMessageFatal(char const*, int, google::CheckOpString const&)' /usr/bin/ld: only_pose_ba_solver.cpp:(.text._ZN5ceres8internal10FixedArrayIdLm6ESaIdEEixEm[_ZN5ceres8internal10FixedArrayIdLm6ESaIdEEixEm]+0xb9): undefined reference to google::LogMessage::stream()'
/usr/bin/ld: only_pose_ba_solver.cpp:(.text._ZN5ceres8internal10FixedArrayIdLm6ESaIdEEixEm[_ZN5ceres8internal10FixedArrayIdLm6ESaIdEEixEm]+0xc5): undefined reference to google::LogMessageFatal::~LogMessageFatal()' /usr/bin/ld: only_pose_ba_solver.cpp:(.text._ZN5ceres8internal10FixedArrayIdLm6ESaIdEEixEm[_ZN5ceres8internal10FixedArrayIdLm6ESaIdEEixEm]+0x106): undefined reference to google::LogMessageFatal::~LogMessageFatal()'
/usr/bin/ld: CMakeFiles/g2o_optimizers.dir/src/only_pose_ba_solver.cpp.o: in function std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >* google::MakeCheckOpString<unsigned long, unsigned long>(unsigned long const&, unsigned long const&, char const*)': only_pose_ba_solver.cpp:(.text._ZN6google17MakeCheckOpStringImmEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_RKT0_PKc[_ZN6google17MakeCheckOpStringImmEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_RKT0_PKc]+0x37): undefined reference to google::base::CheckOpMessageBuilder::CheckOpMessageBuilder(char const*)'
/usr/bin/ld: only_pose_ba_solver.cpp:(.text._ZN6google17MakeCheckOpStringImmEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_RKT0_PKc[_ZN6google17MakeCheckOpStringImmEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_RKT0_PKc]+0x61): undefined reference to google::base::CheckOpMessageBuilder::ForVar2()' /usr/bin/ld: only_pose_ba_solver.cpp:(.text._ZN6google17MakeCheckOpStringImmEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_RKT0_PKc[_ZN6google17MakeCheckOpStringImmEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_RKT0_PKc]+0x7f): undefined reference to google::base::CheckOpMessageBuilder::NewStringgoogle::base::CheckOpMessageBuilder::~CheckOpMessageBuilder()' /usr/bin/ld: only_pose_ba_solver.cpp:(.text._ZN6google17MakeCheckOpStringImmEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_RKT0_PKc[_ZN6google17MakeCheckOpStringImmEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_RKT0_PKc]+0xb6): undefined reference to google::base::CheckOpMessageBuilder::~CheckOpMessageBuilder()'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/g2o_optimizers.dir/build.make:277: g2o_optimizers] Error 1
make[1]: *** [CMakeFiles/Makefile2:83: CMakeFiles/g2o_optimizers.dir/all] Error 2
make: *** [Makefile:91: all] Error 2

`

[Rainer Kümmerle]

I believe this is due to your build picking up ceres headers from the system instead of from g2o. I guess, it was some sort of bad practice on my end to include ceres headers without changing namespace to avoid linker issues.
Master branch hopefully clears this issue. Can you please check if this works for you.

[Göktuğ Yıldırım]

After I purged Ceres and re-built g2o, It solved. Thanks.