Linking problems with a classes in different packages

edit

Hi,

I have defined the class Person in the social_layers package. Now I want to use it in a different package. So I have included the header in this way:

#include "../../../social_layers/include/social_layers/person.hpp"

And then is use it in the code. Unfortunately, I got this error:

/home/alberto/tiago_dual_public_ws/devel/.private/new_policies_system/lib/libnew_policies_system.so: undefined reference to `Person::Person(int, unsigned char, double, geometry_msgs::Pose_<std::allocator<void> >)'
collect2: error: ld returned 1 exit status
make[2]: *** [/home/alberto/tiago_dual_public_ws/devel/.private/new_policies_system/lib/new_policies_system/test_motion_estimation] Error 1
make[1]: *** [CMakeFiles/test_motion_estimation.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
/home/alberto/tiago_dual_public_ws/devel/.private/new_policies_system/lib/libnew_policies_system.so: undefined reference to `Person::Person(int, unsigned char, double, geometry_msgs::Pose_<std::allocator<void> >)'
collect2: error: ld returned 1 exit status
make[2]: *** [/home/alberto/tiago_dual_public_ws/devel/.private/new_policies_system/lib/new_policies_system/test_input] Error 1
make[1]: *** [CMakeFiles/test_input.dir/all] Error 2
/home/alberto/tiago_dual_public_ws/devel/.private/new_policies_system/lib/libnew_policies_system.so: undefined reference to `Person::Person(int, unsigned char, double, geometry_msgs::Pose_<std::allocator<void> >)'
collect2: error: ld returned 1 exit status
make[2]: *** [/home/alberto/tiago_dual_public_ws/devel/.private/new_policies_system/lib/new_policies_system/test_person_attention] Error 1
make[1]: *** [CMakeFiles/test_person_attention.dir/all] Error 2
make: *** [all] Error 2

In the original package, I get no errors. Can someone help me to understand why?

EDIT: add CMakeLists

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
cmake_minimum_required(VERSION 3.0.2)
project(new_policies_system)

find_package(catkin REQUIRED COMPONENTS 
roscpp 
std_msgs 
nav_msgs 
map_msgs 
message_generation grid_map_ros 
costmap_2d 
eigen_conversions 
dynamic_reconfigure
continuous_input
grid_map_core
grid_map_ros
grid_map_cv
grid_map_filters
grid_map_loader
grid_map_msgs
grid_map_octomap
grid_map_rviz_plugin
grid_map_visualization
geometry_msgs
sensor_msgs
cv_bridge
octomap_msgs
filters
motion_estimation
social_layers
gazebo_person_detection
)


find_package(cmake_modules REQUIRED)

find_package(Eigen3 QUIET)
if(NOT EIGEN3_FOUND)
  find_package(PkgConfig REQUIRED)
  pkg_check_modules(EIGEN3 REQUIRED eigen3)
  set(EIGEN3_INCLUDE_DIR ${EIGEN3_INCLUDE_DIRS})
endif()

## Generate messages in the 'msg' folder
add_message_files(
   FILES
   continuous_input.msg
)

## Generate added messages and services with any dependencies listed here
 generate_messages(
   DEPENDENCIES
   std_msgs
 )

include_directories(include ${catkin_INCLUDE_DIRS} ${EIGEN3_INCLUDE_DIRS}})

generate_dynamic_reconfigure_options (
        cfg/Policy.cfg
)


catkin_package(
  INCLUDE_DIRS 
    include
  LIBRARIES 
    ${PROJECT_NAME}
  CATKIN_DEPENDS
    roscpp
    message_runtime
  DEPENDS 
    EIGEN3
)


add_library(new_policies_system
            src/Policy.cpp
            src/MathUtilities.cpp
            src/GeometryUtilities.cpp
                        src/Input.cpp
                        src/MotionEstimation.cpp
                    src/PersonAttention.cpp
            src/UserIntention.cpp


)

target_link_libraries(${PROJECT_NAME} 
                      ${catkin_LIBRARIES} 
                      ${EIGEN3_LIBRARIES}
)



add_dependencies(${PROJECT_NAME} 
                 ${catkin_EXPORTED_TARGETS}
)

add_executable(test_input src/test_input.cpp)
target_link_libraries(test_input ${PROJECT_NAME})
add_dependencies(test_input ${PROJECT_NAME}_gencfg)

add_executable(test_motion_estimation src/test_motion_estimation.cpp)
target_link_libraries(test_motion_estimation ${PROJECT_NAME})
add_dependencies(test_motion_estimation ${PROJECT_NAME}_gencfg)

add_executable(test_person_attention src/test_person_attention.cpp)
target_link_libraries(test_person_attention ${PROJECT_NAME})
add_dependencies(test_person_attention ${PROJECT_NAME}_gencfg)



add_executable(continuous_input_stub src/continuous_input_stub.cpp)
target_link_libraries(continuous_input_stub ${PROJECT_NAME})