Building ncnn with Xcode Command Line Tools

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This is my first time using Xcode Command Line Tools (13.2.1). I am following the instructions on how to build ncnn here: https://github.com/Tencent/ncnn/wiki/how-to-build#build-for-macos

Do I need to go into Xcode or can I just run the commands in the Terminal?

What is the function of Xcode Command Line Tools and how should it be applied in this case?

For further context I am converting a YOLOX.onnx model using these instructions: https://yolox.readthedocs.io/en/latest/demo/ncnn_cpp_readme.html

and I am getting the error when building ncnn: clang: error: linker command failed with exit code 1 (use -v to see invocation) make[2]: *** [tools/onnx/onnx2ncnn] Error 1 make[1]: *** [tools/onnx/CMakeFiles/onnx2ncnn.dir/all] Error 2

The directions to convert onnx to ncnn tell me to:

cd <path of ncnn>
cd build/tools/ncnn```

However I do not have a ncnn folder inside of my tools folder...
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