Home/ Questions/Recommendation for the ld: symbol(s) not found for architecture x86_64 error
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Elliott Thomas
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Asked: 2022-05-11T17:22:22+00:00 In:

Recommendation for the ld: symbol(s) not found for architecture x86_64 error

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As title, I am getting ld: symbol(s) not found for architecture x86_64 error. How can I fix it so the error goes away?
Here is my code:

g++ -L/opt/local/lib -lopencv_core -lopencv_highgui -lopencv_imgproc src/Config.o src/Features.o src/HaarFeature.o src/HaarFeatures.o src/HistogramFeatures.o src/ImageRep.o src/LaRank.o src/MultiFeatures.o src/RawFeatures.o src/Sampler.o src/Tracker.o src/main.o src/GraphUtils/GraphUtils.o -o struck

When I operate it and I received the error text:

Undefined symbols for architecture x86_64: 
 "cv::namedWindow(std::__1::basic_string<char,
 std::__1::char_traits<char>, std::__1::allocator<char> > const&,
 int)", referenced from:
  _main in main.o "cv::split(cv::Mat const&, std::__1::vector<cv::Mat, std::__1::allocator<cv::Mat> >&)",
 referenced from:
  ImageRep::ImageRep(cv::Mat const&, bool, bool, bool) in ImageRep.o "cv::imread(std::__1::basic_string<char,
 std::__1::char_traits<char>, std::__1::allocator<char> > const&,
 int)", referenced from:
  _main in main.o "cv::imshow(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&,
 cv::_InputArray const&)", referenced from:
  LaRank::Debug() in LaRank.o
  Tracker::Debug() in Tracker.o
  _main in main.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see
 invocation)

I appreciate any help from you.

symbol(s) not found
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2 Answers

  1. Best Answer

    Have you tried to run:

    g++ -o exec main.o add.o

    I hope it helps

    • 6

  2. I had a similar warning/error/failure when I was simply trying to make an executable from two different object files (main.o and add.o). The command was:

    gcc -o exec main.o add.o

    My program is C++. My problem was solved by the g++ compiler

    g++ -o exec main.o add.o

    These things were always my impression of gcc. It turns out that it doesn’t. I hope this helps someone else who is trying to find this error.

    • 13

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