Checklist

• I have searched for similar issues.
• For Python issues, I have tested with the latest development wheel.
• I have checked the release documentation and the latest documentation (for master branch).

Steps to reproduce the issue

I first cloned Open3D by:

git clone https://github.com/isl-org/Open3D.git
cd Open3D

Then, I built Open3D with:

mkdir build
cd build
cmake  ..
make -j$(sysctl -n hw.physicalcpu)

This is all simply following the official instructions here

Error message

[ 45%] Building CXX object cpp/open3d/t/io/CMakeFiles/tio.dir/PointCloudIO.cpp.o
/Users/steven/Open3D/cpp/open3d/t/pipelines/registration/Feature.cpp:104:15: error: unused variable 'kOuterThreads' [-Werror,-Wunused-variable]

and some other similar ones

Open3D, Python and System information

- Operating system: macOS 12.6.7
- System architecture: x86 / arm64 / apple-silicon 
- Is this a remote workstation?: no
- How did you install Open3D?: build from source
- Compiler version (if built from source): Apple clang version 14.0.0 (clang-1400.0.29.202)

Additional information

No response