Undefined references while compiling

[ferhatm]

Hey, I'm getting this error while compiling ;

[ 26%] Built target darknet_ros_msgs_generate_messages_py [ 38%] Built target darknet_ros_msgs_generate_messages_cpp [ 56%] Built target darknet_ros_msgs_generate_messages_nodejs [ 74%] Built target darknet_ros_msgs_generate_messages_lisp [ 94%] Built target darknet_ros_msgs_generate_messages_eus [ 96%] Built target darknet_ros_lib [ 96%] Built target darknet_ros_msgs_generate_messages [ 98%] Linking CXX executable /home/nvidia/ip_ws/devel/lib/darknet_ros/darknet_ros CMakeFiles/darknet_ros.dir/src/yolo_object_detector_node.cpp.o: In function main': /home/nvidia/ip_ws/src/darknet_ros/darknet_ros/src/yolo_object_detector_node.cpp:15: undefined reference todarknet_ros::YoloObjectDetector::YoloObjectDetector(ros::NodeHandle)' /home/nvidia/ip_ws/src/darknet_ros/darknet_ros/src/yolo_object_detector_node.cpp:15: undefined reference to darknet_ros::YoloObjectDetector::~YoloObjectDetector()' /home/nvidia/ip_ws/src/darknet_ros/darknet_ros/src/yolo_object_detector_node.cpp:15: undefined reference todarknet_ros::YoloObjectDetector::~YoloObjectDetector()' collect2: error: ld returned 1 exit status darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/build.make:197: recipe for target '/home/nvidia/ip_ws/devel/lib/darknet_ros/darknet_ros' failed make[2]: [/home/nvidia/ip_ws/devel/lib/darknet_ros/darknet_ros] Error 1 CMakeFiles/Makefile2:2375: recipe for target 'darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/all' failed make[1]: [darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/all] Error 2 Makefile:138: recipe for target 'all' failed make: *** [all] Error 2 Invoking "make -j4 -l4" failed

Can you help please ? Thanks

[Juna2]

[100%] Built target combined_robot_hw_dummy_app [100%] Built target canopen_motor_node [100%] Linking CXX executable /home/irobot2/catkin_ws/devel/lib/darknet_ros/darknet_ros CMakeFiles/darknet_ros.dir/src/yolo_object_detector_node.cpp.o: In function main': /home/irobot2/catkin_ws/src/darknet_ros/darknet_ros/src/yolo_object_detector_node.cpp:15: undefined reference todarknet_ros::YoloObjectDetector::YoloObjectDetector(ros::NodeHandle)' /home/irobot2/catkin_ws/src/darknet_ros/darknet_ros/src/yolo_object_detector_node.cpp:15: undefined reference to darknet_ros::YoloObjectDetector::~YoloObjectDetector()' /home/irobot2/catkin_ws/src/darknet_ros/darknet_ros/src/yolo_object_detector_node.cpp:15: undefined reference todarknet_ros::YoloObjectDetector::~YoloObjectDetector()' collect2: error: ld returned 1 exit status darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/build.make:187: recipe for target '/home/irobot2/catkin_ws/devel/lib/darknet_ros/darknet_ros' failed make[2]: [/home/irobot2/catkin_ws/devel/lib/darknet_ros/darknet_ros] Error 1 CMakeFiles/Makefile2:23780: recipe for target 'darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/all' failed make[1]: [darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/all] Error 2 Makefile:138: recipe for target 'all' failed make: *** [all] Error 2 Invoking "make -j6 -l6" failed

I have same issue please save me

[superhector2000]

You need to update your gcc to a higher version. For me it worked after following this https://gist.github.com/zuyu/7d5682a5c75282c596449758d21db5ed and if you have multiple versions installed do catkin_make -DCUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda -DCMAKE_C_COMPILER=gcc-6 -DCMAKE_CXX_COMPILER=g++-6 -DCMAKE_BUILD_TYPE=Release

[qwedaq]

You need to update your gcc to a higher version. For me it worked after following this https://gist.github.com/zuyu/7d5682a5c75282c596449758d21db5ed and if you have multiple versions installed do catkin_make -DCUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda -DCMAKE_C_COMPILER=gcc-6 -DCMAKE_CXX_COMPILER=g++-6 -DCMAKE_BUILD_TYPE=Release

hi i have the same error and also my gcc version 7.5.0. Can you please help me? I am attaching the error below CMakeFiles/darknet_ros.dir/src/yolo_object_detector_node.cpp.o: In function main': /home/nvidia/objd_ws/src/darknet_ros/darknet_ros/src/yolo_object_detector_node.cpp:15: undefined reference todarknet_ros::YoloObjectDetector::YoloObjectDetector(ros::NodeHandle)' /home/nvidia/objd_ws/src/darknet_ros/darknet_ros/src/yolo_object_detector_node.cpp:15: undefined reference to darknet_ros::YoloObjectDetector::~YoloObjectDetector()' /home/nvidia/objd_ws/src/darknet_ros/darknet_ros/src/yolo_object_detector_node.cpp:15: undefined reference todarknet_ros::YoloObjectDetector::~YoloObjectDetector()' collect2: error: ld returned 1 exit status darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/build.make:213: recipe for target '/home/nvidia/objd_ws/devel/lib/darknet_ros/darknet_ros' failed make[2]: [/home/nvidia/objd_ws/devel/lib/darknet_ros/darknet_ros] Error 1 CMakeFiles/Makefile2:2060: recipe for target 'darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/all' failed make[1]: [darknet_ros/darknet_ros/CMakeFiles/darknet_ros.dir/all] Error 2 Makefile:140: recipe for target 'all' failed make: *** [all] Error 2 Invoking "make -j8 -l8" failed