main.cpp:(.text+0x1180): undefined reference to `cv::randn(cv::_InputOutputArray const, cv::_InputA

Bertha ·

更新时间:2024-09-20

· 798 次阅读

在运行KalmanFilter的时候需要用到opencv的库，按照之前的方式在CMakeLists.txt中：

target_link_libraries(KalmanFilter
	${OPENCV_LIBS}
)

但是发现make的时候找不到opencv，报错如下：
main.cpp:(.text+0x1eb): undefined reference to cv::KalmanFilter::KalmanFilter(int, int, int, int)' main.cpp:(.text+0x245): undefined reference tocv::Mat::zeros(int, int, int)’
main.cpp:(.text+0x31a): undefined reference to cv::randn(cv::_InputOutputArray const&, cv::_InputArray const&, cv::_InputArray const&)' main.cpp:(.text+0x44f): undefined reference tocv::setIdentity(cv::InputOutputArray const&, cv::Scalar const&)’
…
以上省略相似的opencv undefined错误：
查找资料的时候发现，是因为在编译的时候，编译的参数配置不正确，并没有指定Lib目录的路径，导致编译的时候，静态链接库无法找到，可以通过添加上依赖的方式的解决，直接使用g++的命令：

g++ main.cpp -o test `pkg-config --cflags --libs opencv`

生成test可执行文件，通过。但是毕竟是工程化的东西，还是希望在CMakeLists里面更新下从而解决问题。
首先，通过pkg-config --cflags --libs opencv来查找opencv的库，显示如下：
-I/usr/local/include/opencv -I/usr/local/include -L/usr/local/lib -lopencv_cudabgsegm -lopencv_cudaobjdetect -lopencv_cudastereo -lopencv_dnn -lopencv_ml -lopencv_shape -lopencv_stitching -lopencv_cudafeatures2d -lopencv_superres -lopencv_cudacodec -lopencv_videostab -lopencv_cudaoptflow -lopencv_cudalegacy -lopencv_calib3d -lopencv_features2d -lopencv_highgui -lopencv_videoio -lopencv_photo -lopencv_imgcodecs -lopencv_cudawarping -lopencv_cudaimgproc -lopencv_cudafilters -lopencv_video -lopencv_objdetect -lopencv_imgproc -lopencv_flann -lopencv_cudaarithm -lopencv_core -lopencv_cudev
将上面的内容加入到CMakeLists里面，如下所示：

target_link_libraries(KalmanFilter  -I/usr/local/include/opencv -I/usr/local/include -L/usr/local/lib -lopencv_cudabgsegm -lopencv_cudaobjdetect -lopencv_cudastereo -lopencv_dnn -lopencv_ml -lopencv_shape -lopencv_stitching -lopencv_cudafeatures2d -lopencv_superres -lopencv_cudacodec -lopencv_videostab -lopencv_cudaoptflow -lopencv_cudalegacy -lopencv_calib3d -lopencv_features2d -lopencv_highgui -lopencv_videoio -lopencv_photo -lopencv_imgcodecs -lopencv_cudawarping -lopencv_cudaimgproc -lopencv_cudafilters -lopencv_video -lopencv_objdetect -lopencv_imgproc -lopencv_flann -lopencv_cudaarithm -lopencv_core -lopencv_cudev)

终于编译通过，写个博客给自己备忘：）

[参考：(https://blog.csdn.net/wang7807564/article/details/78416809)]