blog recipe mini open all () read color req

錯誤提示:

CMakeFiles/my_subscriber.dir/src/my_subscriber.cpp.o：在函數‘imageCallback(boost::shared_ptr<sensor_msgs::Image_<std::allocator<void> > const> const&)’中：
my_subscriber.cpp:(.text+0xb0)：對‘cv::imshow(cv::String const&, cv::_InputArray const&)’未定義的引用
CMakeFiles/my_subscriber.dir/src/my_subscriber.cpp.o：在函數‘main’中：

my_subscriber.cpp:(.text+0x405)：對‘cv::namedWindow(cv::String const&, int)’未定義的引用
my_subscriber.cpp:(.text+0x419)：對‘cv::startWindowThread()’未定義的引用
my_subscriber.cpp:(.text+0x66b)：對‘cv::destroyWindow(cv::String const&)’未定義的引用
collect2: error: ld returned 1 exit status
my_image_transport/CMakeFiles/my_subscriber.dir/build.make:128: recipe for target ‘/home/pdg/catkin_ws/devel/lib/my_image_transport/my_subscriber‘ failed
make[2]: *** [/home/pdg/catkin_ws/devel/lib/my_image_transport/my_subscriber] Error 1
CMakeFiles/Makefile2:1706: recipe for target ‘my_image_transport/CMakeFiles/my_subscriber.dir/all‘ failed
make[1]: *** [my_image_transport/CMakeFiles/my_subscriber.dir/all] Error 2
Makefile:138: recipe for target ‘all‘ failed
make: *** [all] Error 2

解決方法:

CMakeLists.txt中要有target_link_libraries(my_subscriber ${catkin_LIBRARIES} ${OpenCV_LIBS})

完整CMakeLists.txt文件如下:

cmake_minimum_required(VERSION 2.8.3)

project(my_image_transport)

find_package(catkin REQUIRED COMPONENTS

OpenCV

cv_bridge

image_transport

)

include_directories(

include

${catkin_INCLUDE_DIRS}

${OpenCV_INCLUDE_DIRS}

)

add_executable(my_subscriber src/my_subscriber.cpp)
target_link_libraries(my_subscriber ${catkin_LIBRARIES} ${OpenCV_LIBS})

由於未定義的引用,無法獲取OpenCV進行編譯?