ld: symbol(s) not found for architecture x86_64

[linchakpan]

Hi all, I have been facing some issues with im running "Luarocks install cv" in my terminal. I'm currently using mac os Catalina, anaconda environment, and without cuda supported GPU.

I have created an environment via conda, and I have installed the latest version of Torch and openCV v3.1.0. However, im facing the following issue when installing Lua cv.

-- Build files have been written to: /tmp/luarocks_cv-scm-1-719/torch-opencv/build
Scanning dependencies of target Common
[ 2%] Building CXX object CMakeFiles/Common.dir/src/Common.cpp.o
[ 5%] Linking CXX shared library lib/libCommon.dylib
[ 5%] Built target Common
Scanning dependencies of target xphoto
[ 7%] Building CXX object CMakeFiles/xphoto.dir/src/xphoto.cpp.o
[ 10%] Linking CXX shared library lib/libxphoto.dylib
[ 10%] Built target xphoto
Scanning dependencies of target calib3d
[ 13%] Building CXX object CMakeFiles/calib3d.dir/src/calib3d.cpp.o
[ 15%] Linking CXX shared library lib/libcalib3d.dylib
[ 15%] Built target calib3d
Scanning dependencies of target objdetect
[ 18%] Building CXX object CMakeFiles/objdetect.dir/src/objdetect.cpp.o
[ 21%] Linking CXX shared library lib/libobjdetect.dylib
Undefined symbols for architecture x86_64:
"cv::groupRectangles(std::_1::vector<cv::Rect, std::_1::allocator<cv::Rect > >&, std::__1::vector<int, std::__1::allocator >&, int, double)", referenced from:
_groupRectangles in objdetect.cpp.o
"cv::CascadeClassifier::detectMultiScale(cv::_InputArray const&, std::_1::vector<cv::Rect, std::_1::allocator<cv::Rect > >&, std::__1::vector<int, std::__1::allocator >&, std::__1::vector<double, std::1::allocator >&, double, int, int, cv::Size, cv::Size, bool)", referenced from:
_CascadeClassifier_detectMultiScale3 in objdetect.cpp.o
"cv::CascadeClassifier::detectMultiScale(cv::_InputArray const&, std::_1::vector<cv::Rect, std::_1::allocator<cv::Rect > >&, std::__1::vector<int, std::1::allocator >&, double, int, int, cv::Size, cv::Size)", referenced from:
_CascadeClassifier_detectMultiScale2 in objdetect.cpp.o
"cv::CascadeClassifier::detectMultiScale(cv::_InputArray const&, std::1::vector<cv::Rect, std::1::allocator<cv::Rect > >&, double, int, int, cv::Size, cv::Size)", referenced from:
_CascadeClassifier_detectMultiScale in objdetect.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [lib/libobjdetect.dylib] Error 1
make[1]: *** [CMakeFiles/objdetect.dir/all] Error 2
make: *** [all] Error 2

Error: Build error: Failed building.

---

It seems that there is some issue with libobjdetect.dylib. I'm unsure if it is not compatible or it is missing. I have seen a similar post earlier, and have made sure i installed the 64-bit opencv v3.1.0. Does anyone know what is this issue, and how should i solve this?