Opencv Error when running make

[vineeth2309]

When i run make, it returns a linking error.

/usr/bin/ld: CMakeFiles/YOLOv5LibTorch.dir/src/YOLOv5LibTorch.cpp.o: in function main': YOLOv5LibTorch.cpp:(.text.startup+0xed7): undefined reference to cv::putText(cv::InputOutputArray const&, std::string const&, cv::Point, int, double, cv::Scalar_, int, int, bool)' /usr/bin/ld: YOLOv5LibTorch.cpp:(.text.startup+0xf5a): undefined reference to cv::imshow(std::string const&, cv::_InputArray const&)' /usr/bin/ld: YOLOv5LibTorch.cpp:(.text.startup+0x1621): undefined reference to cv::format(char const*, ...)' /usr/bin/ld: YOLOv5LibTorch.cpp:(.text.startup+0x16f6): undefined reference to `cv::putText(cv::InputOutputArray const&, std::string const&, cv::Point, int, double, cv::Scalar_, int, int, bool)' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/YOLOv5LibTorch.dir/build.make:160: ../bin/YOLOv5LibTorch] Error 1 make[1]: *** [CMakeFiles/Makefile2:95: CMakeFiles/YOLOv5LibTorch.dir/all] Error 2 make: *** [Makefile:103: all] Error 2

[lotricekCZ]

If you haven't figured it out since then, there might be some solutions that might help you. I have encountered similar problems

1. Don't download that libtorch that is recomended in Readme. That was the first thing that was not working for me.

• Instead, download it from PyTorch website, but if you are looking compatability with OpenCV on C++, use this one with cxx11 ABI.
• Don't forget to erase the other one.

2. Second thing, check your OpenCV version if it meets your expectations, I included several times opencv instead of e.g. opencv4, but this might not be the case.

[Nineteener]

@lotricekCZ thanks！ I changed the original libtorch with that you provided.Problem solved.