对符号“_zn5boost6system15system_categoryev”/的未定义引用

Question

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})

如有任何线索将不胜感激。

换了cmakelists后我又遇到了一个问题

*** 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

应该将boost库传递给target_link_libraries命令。对文件的最小更改如下：

target_link_libraries(qttest ${QT_LIBRARIES} ${LIBS})

但是，由于您正在使用find_package进行Boost操作，并且实际上并没有在任何地方使用libs变量，因此应该坚持如下所示：

find_package(Boost COMPONENTS system REQUIRED)
...
target_link_libraries(qttest ${QT_LIBRARIES} ${OpenCV_LIBS} ${Boost_LIBRARIES})

并完全删除libs。