undefined reference to `dynamic_reconfigure::__init_mutex__'

[xieshuaix]

Hi, I got an error "undefined reference to `dynamic_reconfigure::__init_mutex__'" while compiling a node using dyanmic reconfigure. It seems that this has something to do with linking between TestConfig.h, config_init_mutex.h and dynamic_reconfigure_config_init_mutex.cpp when compiling the dynamic_reconfigure package. Anyone has any idea how to fix this? Thanks!

[mikaelarguedas]

@xieshuaix thanks for reporting the issue. Do you happen to have a reproducible example? Ideally a package to clone and a series of steps to build it and experience the build failure. A build log would also be helpful to know what's missing

[user1409]

I am experiencing the same problem, has there been any fix so far? Have you solved the problem yourself @xieshuaix ? Would be really glad for some advise, what to try

[xieshuaix]

@mikaelarguedas Thanks for your reply. I managed to get it working. What causes the problem is that the library was not properly linked.

[xieshuaix]

@user1409 I fixed the issue. You could try double checking if the library is linked or not (i.e. if using cmake, find_package(dynamic_reconfigure)).

[user1409]

@xieshuaix thank you for your answer. I already triple checked it. Am I missing something?

Added it here: find_package(catkin REQUIRED COMPONENTS roscpp std_msgs sensor_msgs dynamic_reconfigure message_generation )

Put in my cfg-File at "generate_dynamic_reconfigure_options"

And made sure it is build first: add_dependencies(my_pkg ${PROJECT_NAME}_gencfg)

Still got this error. I have a different project, where I did the same, but its just compiling fine.

[mjcarroll]

It sounds like this is resolved via correct library linking. @user1409 if you are still experiencing this, feel free to open an additional issue.

[dupeljan]

Same error so far. My CMakeLists.txt:

cmake_minimum_required(VERSION 3.1.0 FATAL_ERROR) project(CartConrolPlugin)

Generate code from our own custom messages

find_package catkin and genmsg, required for message generation macros

find_package(catkin REQUIRED COMPONENTS dynamic_reconfigure) find_package(genmsg REQUIRED)

Enumerate our custom messages files

add_message_files(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} FILES msg/Velocity.msg msg/Position.msg) generate_messages(DEPENDENCIES)

Generate dynamic reconf

generate_dynamic_reconfigure_options( cfg/PIDconf.cfg

...

)

find ros

find_package(roscpp REQUIRED) find_package(std_msgs REQUIRED) include_directories(${roscpp_INCLUDE_DIRS}) include_directories(${std_msgs_INCLUDE_DIRS})

find gazebo

find_package(gazebo REQUIRED) include_directories(${GAZEBO_INCLUDE_DIRS}) link_directories(${GAZEBO_LIBRARY_DIRS}) list(APPEND CMAKE_CXX_FLAGS "${GAZEBO_CXX_FLAGS}")

find qt

set(CMAKE_INCLUDE_CURRENT_DIR ON) set(CMAKE_AUTOMOC ON) set(CMAKE_AUTOUIC ON) set(CMAKE_AUTORCC ON) find_package(Qt5 REQUIRED COMPONENTS Widgets)

build libruary

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GAZEBO_CXX_FLAGS} ") add_library(main SHARED main.cc) add_dependencies(main ${PROJECT_NAME}_generate_messages) target_link_libraries(main ${GAZEBO_LIBRARIES} ${Boost_LIBRARIES} ${roscpp_LIBRARIES})

set(CMAKE_BUILD_TYPE Debug)

build client

add_executable(client client.cc)

add_executable(client client/main.cpp client/mainwindow.cpp client/mainwindow.h client/mainwindow.ui client/resources.qrc client/cartcontrollerwidget.cpp client/cartcontrollerwidget.h client/rospublisher.cpp client/rospublisher.h client/cartkinematic.cpp client/cartkinematic.h ) target_link_libraries(client ${roscpp_LIBRARIES} Qt5::Widgets) add_dependencies(client ${PROJECT_NAME}_generate_messages)

Build cfg server

add_executable(drfServer drcfServer.cpp) add_dependencies(drfServer ${PROJECT_NAME}_generate_messages ${PROJECT_NAME}_gencfg) target_link_libraries(drfServer ${Boost_LIBRARIES} ${roscpp_LIBRARIES})