There is something wrong with Sophus

[CurrySerena]

test_depth_filter.cpp:(.text.startup+0x8f0): undefined reference to Sophus::SE3::SE3(Eigen::Quaternion<double, 0> const&, Eigen::Matrix<double, 3, 1, 0, 3, 1> const&)' test_depth_filter.cpp:(.text.startup+0x9b2): undefined reference to Sophus::SE3::inverse() const' test_depth_filter.cpp:(.text.startup+0x9d2): undefined reference to Sophus::SE3::operator=(Sophus::SE3 const&)' test_depth_filter.cpp:(.text.startup+0x11f8): undefined reference to Sophus::SE3::inverse() const' test_depth_filter.cpp:(.text.startup+0x1218): undefined reference to `Sophus::SE3::operator=(Sophus::SE3 const&)'

How can I figure out this problem about undefined reference.

[LIANGXINKAI]

add "SET(Sophus_LIBRARIES libSophus.so " to /catkin_ws/src/rgp_vikit/vikit_common/CMakeLists.txt such as