Use imported targets. (#42)

cartographer_turtlebot/CMakeLists.txt

@@ -48,8 +48,7 @@ if (CATKIN_ENABLE_TESTING)
   target_include_directories(configuration_files_test SYSTEM PUBLIC ${catkin_INCLUDE_DIRS})
   target_link_libraries(configuration_files_test ${catkin_LIBRARIES})
   add_dependencies(configuration_files_test ${catkin_EXPORTED_TARGETS})
-  target_include_directories(configuration_files_test SYSTEM PUBLIC ${CARTOGRAPHER_INCLUDE_DIRS})
-  target_link_libraries(configuration_files_test ${CARTOGRAPHER_LIBRARIES})
+  target_link_libraries(configuration_files_test cartographer)
   set(TARGET_COMPILE_FLAGS "${TARGET_COMPILE_FLAGS} ${GOOG_CXX_FLAGS}")
   set_target_properties(configuration_files_test PROPERTIES COMPILE_FLAGS ${TARGET_COMPILE_FLAGS})
 endif()