Compilation issues on cross zigbuild

[DennisZhangOiler]

1. Operating system Host Ubuntu 22.04 Cross v0.2.5 aarch64-unknown-linux-gnu zigbuild 0.17.5 target glibc version 2.27

2. The way you installed OpenCV: package, official binary distribution, manual compilation, etc. Manual compilation from cmake, then setup CMAKE_PREFIX_PATH

3. OpenCV version 4.1.1

4. rustc version (rustc --version) rustc 1.77.0 (aedd173a2 2024-03-17)

5. Attach the full output of the following command from your project directory:

cross build --target aarch64-unknown-linux-gnu

  = note: ld.lld: error: undefined symbol: cv::imwrite(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&, cv::_InputArray const&, std::__1::vector<int, std::__1::allocator<int>> const&)
          >>> referenced by imgcodecs.cpp:85 (/target/aarch64-unknown-linux-gnu/debug/build/opencv-415f844eed75b8c0/out/imgcodecs.cpp:85)
          >>>               15890d46206e65af-imgcodecs.o:(cv_imwrite_const_StringR_const__InputArrayR_const_vectorLintGR) in archive /target/aarch64-unknown-linux-gnu/debug/deps/libopencv-1756b9ba42e7ca3d.rlib

          ld.lld: error: undefined symbol: cv::error(int, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&, char const*, char const*, int)
          >>> referenced by mat.inl.hpp:548 (/opencv/platforms/linux/build/install/include/opencv4/opencv2/core/mat.inl.hpp:548)
          >>>               15890d46206e65af-core.o:(cv::Mat::Mat(int, int, int, void*, unsigned long)) in archive /target/aarch64-unknown-linux-gnu/debug/deps/libopencv-1756b9ba42e7ca3d.rlib
          >>> referenced by mat.inl.hpp:558 (/opencv/platforms/linux/build/install/include/opencv4/opencv2/core/mat.inl.hpp:558)
          >>>               15890d46206e65af-core.o:(cv::Mat::Mat(int, int, int, void*, unsigned long)) in archive /target/aarch64-unknown-linux-gnu/debug/deps/libopencv-1756b9ba42e7ca3d.rlib
          >>> referenced by mat.inl.hpp:561 (/opencv/platforms/linux/build/install/include/opencv4/opencv2/core/mat.inl.hpp:561)
          >>>               15890d46206e65af-core.o:(cv::Mat::Mat(int, int, int, void*, unsigned long)) in archive /target/aarch64-unknown-linux-gnu/debug/deps/libopencv-1756b9ba42e7ca3d.rlib
          >>> referenced 6 more times

[twistedfall]

I would first suggest you try newest OpenCV version: 4.9.0, the one you use, 4.1.1, is very old. If it still fails, please attach the full build log as produced by cargo build -vv after doing a cargo clean.

[DennisZhangOiler]

I would first suggest you try newest OpenCV version: 4.9.0, the one you use, 4.1.1, is very old. If it still fails, please attach the full build log as produced by cargo build -vv after doing a cargo clean.

Hi @twistedfall , it's probably due to upstream zig problem, that zig does not work with dual ABI, you can check it from here and here, I am still looking for solutions that can build opencv with clang++ or cargo zigbuild add some link flags, thank you for replying!

[twistedfall]

I hope that you found the solution by now, I'm going to close this issue, but if you still need support please feel free to reopen.