yaml-cpp in ROS2 linking errors

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Hi everybody,

Following problem occurred: I'm trying to use yaml-cpp in a ROS2 package and it returns loads of linking errors ("undefined reference to ...") I have linked yaml-cpp to the project in the CMakeLists.txt and it throws no errors what so ever, so I assumed everything went fine. Did something change with the yaml-cpp library for ROS2? Or do i have a mistake in my CMakeList?

Important parts of CMakeLists.txt:

find_package(yaml-cpp REQUIRED)

# include directories
include_directories(
  include
  include/multi_node_controller
  include/multi_node_controller/auto_generated
  ${YAML_CPP_INCLUDEDIR}
)

add_executable(function_parser src/function_parser.cpp)

ament_target_dependencies(function_parser
                          rclcpp
                          std_msgs
                          custom_msgs
                          yaml-cpp)

Or do I need to include it in the package.xml?

Thanks for any help!