c++ - 未定义对 `cv::String::allocate(unsigned long)' 的引用

Question

我正在尝试用 ros 启动 cv_camera 但我无法在 ros 中编译这个包，我启动了这个命令：

catkin_make --only-pkg-with-deps rossumo cv_camera
...
make[1]: *** Waiting for unfinished jobs....
/home/docker/catkin_ws/devel/lib/libcv_camera.so: undefined reference to `cv::String::allocate(unsigned long)'
/home/docker/catkin_ws/devel/lib/libcv_camera.so: undefined reference to `cv::String::deallocate()'
/home/docker/catkin_ws/devel/lib/libcv_camera.so: undefined reference to `cv::VideoCapture::open(cv::String const&)'
/home/docker/catkin_ws/devel/lib/libcv_camera.so: undefined reference to `cv::VideoCapture::open(cv::String const&, int)'
/home/docker/catkin_ws/devel/lib/libcv_camera.so: undefined reference to `cv::VideoCapture::read(cv::_OutputArray const&)'
collect2: error: ld returned 1 exit status
make[2]: *** 
...

你觉得我做错了什么？

谢谢！

Answer 1

我遇到了类似的问题，根本原因是 OpenCV 2 和 OpenCV 3 之间的冲突。当系统同时安装了 OpenCV 2 和 OpenCV 3 时，我们必须非常小心地设置 LDFLAGS。