“/usr/bin/ld: 在 Ubuntu 20.04 中编译 opencv 项目时找不到 -llibopencv_calib3d”

Posted 2023-03-16

【中文标题】“/usr/bin/ld: 在 Ubuntu 20.04 中编译 opencv 项目时找不到 -llibopencv_calib3d”

【英文标题】："/usr/bin/ld: cannot find -llibopencv_calib3d" when compiling an opencv project in Ubuntu 20.04

【发布时间】：2021-11-19 20:57:06

【问题描述】：

我已经按照OpenCV Installation in Linux 中的说明在 Ubuntu 20.04 中安装了 opencv。根据说明，sudo make install 将所有 .so 文件复制到 /usr/local/lib。

但是，在编译程序时，使用命令g++ --std c++17 -g opencv/Basic.cpp -o output -I/usr/local/include/opencv4 -L/usr/local/lib/ -llibopencv_calib3d -llibopencv_core -llibopencv_dnn -llibopencv_features2d -llibopencv_flann -llibopencv_highgui -llibopencv_imgcodecs -llibopencv_imgproc -llibopencv_ml -llibopencv_objdetect -llibopencv_photo -llibopencv_stitching -llibopencv_video -llibopencv_videoio 我得到以下错误。

/usr/bin/ld: cannot find -llibopencv_calib3d
/usr/bin/ld: cannot find -llibopencv_core
/usr/bin/ld: cannot find -llibopencv_dnn
/usr/bin/ld: cannot find -llibopencv_features2d
/usr/bin/ld: cannot find -llibopencv_flann
/usr/bin/ld: cannot find -llibopencv_highgui
/usr/bin/ld: cannot find -llibopencv_imgcodecs
/usr/bin/ld: cannot find -llibopencv_imgproc
/usr/bin/ld: cannot find -llibopencv_ml
/usr/bin/ld: cannot find -llibopencv_objdetect
/usr/bin/ld: cannot find -llibopencv_photo
/usr/bin/ld: cannot find -llibopencv_stitching
/usr/bin/ld: cannot find -llibopencv_video
/usr/bin/ld: cannot find -llibopencv_videoio
collect2: error: ld returned 1 exit status

我还在/etc/ld.so.conf.d/opencv.conf 中添加了一个带有/usr/local/lib/ 行的.conf 文件，并发出了命令sudo ldconfig。但是，问题仍然存在。

对于解决此问题的任何想法或建议，我将不胜感激。

【参考方案1】：

-llibopencv_calib3d

做起来

-lopencv_calib3d

等等。前面的lib 部分是完全错误的

【讨论】：

太棒了！感谢您的及时回复。