undefined reference to symbol '_ZN5boost6system15system_categoryEv' / - boost

Question

this is not the first time I meet this error, but [previous solution][1] doesn't make sense.
[100%] Linking CXX executable ../bin/qttest
/usr/bin/x86_64-linux-gnu-ld: CMakeFiles/qttest.dir/src/main.cpp.o:
undefined reference to symbol '_ZN5boost6system15system_categoryEv'
/usr/lib/x86_64-linux-gnu/libboost_system.so: error adding symbols:
DSO missing from command line collect2: error: ld returned 1 exit
status
here is my cmakelists
cmake_minimum_required(VERSION 2.4.6)
set(OpenCV_DIR "/usr/local/opencv-2.4.9/share/OpenCV")
include_directories("/usr/local/opencv-2.4.9/include")
include($ENV{ROS_ROOT}/core/rosbuild/rosbuild.cmake)
find_package(Qt4 COMPONENTS QtCore QtGui)
find_package(OpenCV 2.4.9 REQUIRED)
INCLUDE(${QT_USE_FILE})
ADD_DEFINITIONS(${QT_DEFINITIONS})
rosbuild_init()
rosbuild_genmsg()
find_package(Boost COMPONENTS system REQUIRED)
set(qt_srcs
src/mainwindow.cpp
src/listnerthr.cpp
src/ros_thr.cpp
src/CreatDataBuffer.cpp
src/CreatBuffer.cpp
src/pid_controller.cpp
src/low_pass_filter.cpp
src/plot_publisher.cpp)
set(qt_hdrs
src/mainwindow.h
src/listnerthr.h
src/ros_thr.h
src/CreatDataBuffer.h
src/HelperFunctions.h
src/CreatBuffer.h
src/pid_controller.h
src/low_pass_filter.h
src/plot_publisher.h)
qt4_automoc(${qt_srcs})
QT4_WRAP_CPP(qt_moc_srcs ${qt_hdrs})
QT4_WRAP_UI(uis_h src/mainwindow.ui)
include_directories(${CMAKE_CURRENT_BINARY_DIR})
set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
set(LIBRARY_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/lib)
rosbuild_add_executable(qttest src/main.cpp
${uis_h} ${qt_srcs} ${qt_moc_srcs})
target_link_libraries(qttest ${QT_LIBRARIES}${Boost_LIBARAIES }${OpenCV_LIBARAIES})
any clues would be appreciated.
I got another problem after changing the cmakelists
*** No rule to make target '/usr/lib/x86_64-linux-gnu/libboost_system.so/usr/lib/x86_64-linux-gnu/libboost_system.so', needed by '../bin/qttest'. Stop. CMakeFiles/Makefile2:425: recipe for target 'CMakeFiles/qttest.dir/all' failed –

Answer 1

You should pass boost libraries to the target_link_libraries command. The smallest change to your file will be as follows:
target_link_libraries(qttest ${QT_LIBRARIES} ${LIBS})
But since you are using find_package for Boost and you do not actually use your LIBS variable anywhere, you should stick with something like this:
find_package(Boost COMPONENTS system REQUIRED)
...
target_link_libraries(qttest ${QT_LIBRARIES} ${OpenCV_LIBS} ${Boost_LIBRARIES})
And remove LIBS altogether.