diagnostics of selective OpenCV build during building

[matanox]

Thanks a lot for this crate.

To be honest I should be debugging the build code of the crate to figure it out rather than asking here.

• Ubuntu 24.04
• OpenCV is built from source, a subset of modules only (to avoid protobuf dependency issues)
• rustc 1.90.0 (1159e78c4 2025-09-14)
• cargo 1.90.0 (840b83a10 2025-07-30)
• opencv-rust version 0.96.0

The OpenCV build is a selective one, yielding the following lib files:

libopencv_core.so         libopencv_highgui.so         libopencv_imgcodecs.so         libopencv_imgproc.so         libopencv_videoio.so
libopencv_core.so.410     libopencv_highgui.so.410     libopencv_imgcodecs.so.410     libopencv_imgproc.so.410     libopencv_videoio.so.410
libopencv_core.so.4.10.0  libopencv_highgui.so.4.10.0  libopencv_imgcodecs.so.4.10.0  libopencv_imgproc.so.4.10.0  libopencv_videoio.so.4.10.0

Environment variables are set by config.toml:

[env]
OPENCV_DISABLE_PROBES = "pkg_config,cmake,vcpkg_cmake,vcpkg"
OPENCV_LINK_LIBS      = "opencv_core,opencv_imgproc,opencv_imgcodecs,opencv_highgui,opencv_videoio"
OPENCV_LINK_PATHS     = { value = "../bazel-bin/third_party/opencv_cmake/lib", relative = true }
OPENCV_INCLUDE_PATHS  = { value = "../bazel-bin/third_party/opencv_cmake/include/opencv4", relative = true }

And the Cargo.toml requirement of the opencv crate is:

opencv = { version = "0.96.0", default-features = false, features = ["imgproc","imgcodecs","highgui","videoio"] }  

When the opencv lib directory has only the non-versioned .so names, the crate simply builds fine, yet not when it also has the versioned .so names in it. in the latter case it says "Generating 0 modules" and doesn't build.

The full cargo build output follows.

$ RUST_BACKTRACE=full cargo build -vv
   Compiling opencv v0.96.0
       Fresh protobuf-parse v3.7.2
       Fresh protobuf-codegen v3.7.2
       Dirty mediapipe-rust-runner v0.1.0 (/home/user/code/mediapipe/rust): the precalculated components changed
   Compiling mediapipe-rust-runner v0.1.0 (/home/user/code/mediapipe/rust)
     Running `CARGO=/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/cargo CARGO_CFG_FEATURE=highgui,imgcodecs,imgproc,videoio CARGO_CFG_PANIC=unwind CARGO_CFG_TARGET_ABI='' CARGO_CFG_TARGET_ARCH=x86_64 CARGO_CFG_TARGET_ENDIAN=little CARGO_CFG_TARGET_ENV=gnu CARGO_CFG_TARGET_FAMILY=unix CARGO_CFG_TARGET_FEATURE=fxsr,sse,sse2 CARGO_CFG_TARGET_HAS_ATOMIC=16,32,64,8,ptr CARGO_CFG_TARGET_OS=linux CARGO_CFG_TARGET_POINTER_WIDTH=64 CARGO_CFG_TARGET_VENDOR=unknown CARGO_CFG_UNIX='' CARGO_ENCODED_RUSTFLAGS='' CARGO_FEATURE_HIGHGUI=1 CARGO_FEATURE_IMGCODECS=1 CARGO_FEATURE_IMGPROC=1 CARGO_FEATURE_VIDEOIO=1 CARGO_MANIFEST_DIR=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0 CARGO_MANIFEST_PATH=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/Cargo.toml CARGO_PKG_AUTHORS='Pro <twisted.fall@gmail.com>:Mathieu Poumeyrol <kali@zoy.org>' CARGO_PKG_DESCRIPTION='Rust bindings for OpenCV' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=MIT CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=opencv CARGO_PKG_README=README.md CARGO_PKG_REPOSITORY='https://github.com/twistedfall/opencv-rust' CARGO_PKG_RUST_VERSION=1.81.0 CARGO_PKG_VERSION=0.96.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=96 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' DEBUG=true HOST=x86_64-unknown-linux-gnu LD_LIBRARY_PATH='/home/user/code/mediapipe/rust/target/debug/deps:/home/user/code/mediapipe/rust/target/debug:/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib:/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib' NUM_JOBS=28 OPENCV_DISABLE_PROBES=pkg_config,cmake,vcpkg_cmake,vcpkg OPENCV_INCLUDE_PATHS=/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4 OPENCV_LINK_LIBS=opencv_core,opencv_imgproc,opencv_imgcodecs,opencv_highgui,opencv_videoio OPENCV_LINK_PATHS=/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib OPT_LEVEL=0 OUT_DIR=/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out PROFILE=debug RUSTC=/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc RUSTDOC=/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustdoc TARGET=x86_64-unknown-linux-gnu /home/user/code/mediapipe/rust/target/debug/build/opencv-63d6204ba8032838/build-script-build`
     Running `CARGO=/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/cargo CARGO_CFG_FEATURE='' CARGO_CFG_PANIC=unwind CARGO_CFG_TARGET_ABI='' CARGO_CFG_TARGET_ARCH=x86_64 CARGO_CFG_TARGET_ENDIAN=little CARGO_CFG_TARGET_ENV=gnu CARGO_CFG_TARGET_FAMILY=unix CARGO_CFG_TARGET_FEATURE=fxsr,sse,sse2 CARGO_CFG_TARGET_HAS_ATOMIC=16,32,64,8,ptr CARGO_CFG_TARGET_OS=linux CARGO_CFG_TARGET_POINTER_WIDTH=64 CARGO_CFG_TARGET_VENDOR=unknown CARGO_CFG_UNIX='' CARGO_ENCODED_RUSTFLAGS='' CARGO_MANIFEST_DIR=/home/user/code/mediapipe/rust CARGO_MANIFEST_PATH=/home/user/code/mediapipe/rust/Cargo.toml CARGO_PKG_AUTHORS='' CARGO_PKG_DESCRIPTION='' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE='' CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=mediapipe-rust-runner CARGO_PKG_README=README.md CARGO_PKG_REPOSITORY='' CARGO_PKG_RUST_VERSION='' CARGO_PKG_VERSION=0.1.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=1 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' DEBUG=true HOST=x86_64-unknown-linux-gnu LD_LIBRARY_PATH='/home/user/code/mediapipe/rust/target/debug/deps:/home/user/code/mediapipe/rust/target/debug:/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib:/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib' NUM_JOBS=28 OPENCV_DISABLE_PROBES=pkg_config,cmake,vcpkg_cmake,vcpkg OPENCV_INCLUDE_PATHS=/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4 OPENCV_LINK_LIBS=opencv_core,opencv_imgproc,opencv_imgcodecs,opencv_highgui,opencv_videoio OPENCV_LINK_PATHS=/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib OPT_LEVEL=0 OUT_DIR=/home/user/code/mediapipe/rust/target/debug/build/mediapipe-rust-runner-85dee340a3afef79/out PROFILE=debug RUSTC=/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc RUSTDOC=/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustdoc TARGET=x86_64-unknown-linux-gnu /home/user/code/mediapipe/rust/target/debug/build/mediapipe-rust-runner-82c5050aaf228f8a/build-script-build`
[mediapipe-rust-runner 0.1.0] custom build script build.rs is starting
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_opencv_branch_34)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_opencv_branch_4)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_opencv_branch_5)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_3d)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_alphamat)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_aruco)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_aruco_detector)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_barcode)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_bgsegm)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_bioinspired)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_calib)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_calib3d)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_ccalib)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_core)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudaarithm)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudabgsegm)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudacodec)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudafeatures2d)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudafilters)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudaimgproc)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudalegacy)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudaobjdetect)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudaoptflow)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudastereo)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudawarping)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_cvv)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_dnn)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_dnn_superres)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_dpm)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_face)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_features)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_features2d)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_flann)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_freetype)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_fuzzy)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_gapi)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_hdf)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_hfs)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_highgui)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_img_hash)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_imgcodecs)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_imgproc)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_intensity_transform)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_line_descriptor)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_mcc)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_ml)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_objdetect)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_optflow)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_ovis)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_phase_unwrapping)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_photo)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_plot)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_quality)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_rapid)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_rgbd)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_saliency)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_sfm)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_shape)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_signal)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_stereo)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_stitching)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_structured_light)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_superres)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_surface_matching)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_text)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_tracking)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_video)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_videoio)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_videostab)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_viz)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_wechat_qrcode)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_xfeatures2d)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_ximgproc)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_xobjdetect)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_xphoto)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_module_xstereo)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_inherent_feature_opencl)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_inherent_feature_cuda)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_inherent_feature_hfloat)
[opencv 0.96.0] cargo::rustc-check-cfg=cfg(ocvrs_has_inherent_feature_algorithm_hint)
[opencv 0.96.0] === Crate version: 0.96.0
[opencv 0.96.0] === Environment configuration:
[opencv 0.96.0] ===   OPENCV_PACKAGE_NAME = None
[opencv 0.96.0] ===   OPENCV_PKGCONFIG_NAME = None
[opencv 0.96.0] ===   OPENCV_CMAKE_NAME = None
[opencv 0.96.0] ===   OPENCV_CMAKE_BIN = None
[opencv 0.96.0] ===   OPENCV_VCPKG_NAME = None
[opencv 0.96.0] ===   OPENCV_LINK_LIBS = Some("opencv_core,opencv_imgproc,opencv_imgcodecs,opencv_highgui,opencv_videoio")
[opencv 0.96.0] ===   OPENCV_LINK_PATHS = Some("/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib")
[opencv 0.96.0] ===   OPENCV_INCLUDE_PATHS = Some("/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4")
[opencv 0.96.0] ===   OPENCV_DISABLE_PROBES = Some("pkg_config,cmake,vcpkg_cmake,vcpkg")
[opencv 0.96.0] ===   OPENCV_MSVC_CRT = None
[opencv 0.96.0] ===   OPENCV_CMAKE_TOOLCHAIN_FILE = None
[opencv 0.96.0] ===   OPENCV_CMAKE_ARGS = None
[opencv 0.96.0] ===   CMAKE_PREFIX_PATH = None
[opencv 0.96.0] ===   OpenCV_DIR = None
[opencv 0.96.0] ===   PKG_CONFIG_PATH = None
[opencv 0.96.0] ===   VCPKG_ROOT = None
[opencv 0.96.0] ===   VCPKGRS_DYNAMIC = None
[opencv 0.96.0] ===   VCPKGRS_TRIPLET = None
[opencv 0.96.0] ===   OCVRS_DOCS_GENERATE_DIR = None
[opencv 0.96.0] ===   DOCS_RS = None
[opencv 0.96.0] ===   PATH = Some("/home/user/.cargo/bin:/usr/bin:/home/user/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin:/home/user/.local/share/JetBrains/Toolbox/scripts")
[opencv 0.96.0] === Enabled features:
[opencv 0.96.0] ===   HIGHGUI
[opencv 0.96.0] ===   IMGCODECS
[opencv 0.96.0] ===   IMGPROC
[opencv 0.96.0] ===   VIDEOIO
[opencv 0.96.0] === Detected probe priority boost based on environment vars: pkg_config: false, cmake: false, vcpkg: false
[opencv 0.96.0] === Probing the OpenCV library in the following order: environment, pkg_config, cmake, vcpkg_cmake, vcpkg
[opencv 0.96.0] === Configuring OpenCV library from the environment:
[opencv 0.96.0] ===   include_paths: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4
[opencv 0.96.0] ===   link_paths: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib
[opencv 0.96.0] ===   link_libs: opencv_core,opencv_imgproc,opencv_imgcodecs,opencv_highgui,opencv_videoio
[opencv 0.96.0] === Successfully probed using: environment
[opencv 0.96.0] === OpenCV library configuration: Library {
[opencv 0.96.0]     include_paths: [
[opencv 0.96.0]         "/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4",
[opencv 0.96.0]     ],
[opencv 0.96.0]     version: Version {
[opencv 0.96.0]         major: 4,
[opencv 0.96.0]         minor: 10,
[opencv 0.96.0]         patch: 0,
[opencv 0.96.0]     },
[opencv 0.96.0]     inherent_features: [
[opencv 0.96.0]         "openjpeg",
[opencv 0.96.0]         "jpeg",
[opencv 0.96.0]         "openexr",
[opencv 0.96.0]         "png",
[opencv 0.96.0]         "pthread",
[opencv 0.96.0]         "pthreads_pf",
[opencv 0.96.0]         "tiff",
[opencv 0.96.0]     ],
[opencv 0.96.0]     cargo_metadata: [
[opencv 0.96.0]         "cargo::rustc-link-search=/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib",
[opencv 0.96.0]         "cargo::rustc-link-lib=opencv_core",
[opencv 0.96.0]         "cargo::rustc-link-lib=opencv_imgproc",
[opencv 0.96.0]         "cargo::rustc-link-lib=opencv_imgcodecs",
[opencv 0.96.0]         "cargo::rustc-link-lib=opencv_highgui",
[opencv 0.96.0]         "cargo::rustc-link-lib=opencv_videoio",
[opencv 0.96.0]     ],
[opencv 0.96.0] }
[opencv 0.96.0] cargo::rustc-cfg=ocvrs_opencv_branch_4
[opencv 0.96.0] === Found OpenCV version: 4.10.0 in headers located at: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4
[opencv 0.96.0] === Detected OpenCV module header dir at: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2
[opencv 0.96.0] cargo::rustc-cfg=ocvrs_has_inherent_feature_hfloat
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_PACKAGE_NAME
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_PKGCONFIG_NAME
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_CMAKE_NAME
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_CMAKE_BIN
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_VCPKG_NAME
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_LINK_LIBS
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_LINK_PATHS
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_INCLUDE_PATHS
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_DISABLE_PROBES
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_MSVC_CRT
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_CMAKE_TOOLCHAIN_FILE
[opencv 0.96.0] cargo::rerun-if-env-changed=OPENCV_CMAKE_ARGS
[opencv 0.96.0] cargo::rerun-if-env-changed=CMAKE_PREFIX_PATH
[opencv 0.96.0] cargo::rerun-if-env-changed=OpenCV_DIR
[opencv 0.96.0] cargo::rerun-if-env-changed=PKG_CONFIG_PATH
[opencv 0.96.0] cargo::rerun-if-env-changed=VCPKG_ROOT
[opencv 0.96.0] cargo::rerun-if-env-changed=VCPKGRS_DYNAMIC
[opencv 0.96.0] cargo::rerun-if-env-changed=VCPKGRS_TRIPLET
[opencv 0.96.0] cargo::rerun-if-env-changed=OCVRS_DOCS_GENERATE_DIR
[opencv 0.96.0] cargo::rerun-if-env-changed=DOCS_RS
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/dnn.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/ocvrs_common.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/ccalib.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/bioinspired.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/photo.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/face.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/alphamat.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/stitching.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/xfeatures2d.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/core.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/hdf.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/gapi.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/manual-core.cpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/sfm.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/aruco.hpp
[opencv 0.96.0] cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/videoio.hpp
[opencv 0.96.0] cargo::rerun-if-changed=Cargo.toml
[opencv 0.96.0] === Generating code in: /home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out
[opencv 0.96.0] === Placing generated bindings into: /home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out/opencv
[opencv 0.96.0] === Using OpenCV headers from: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4
[mediapipe-rust-runner 0.1.0] cargo will try loading OpenCV from: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib
[mediapipe-rust-runner 0.1.0] cargo:rustc-link-arg=-Wl,--enable-new-dtags
[mediapipe-rust-runner 0.1.0] cargo:rustc-link-arg=-Wl,-rpath,/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib
[mediapipe-rust-runner 0.1.0] cargo:rustc-link-arg=-Wl,-rpath,/home/user/code/mediapipe/rust/../bazel-bin/mediapipe/examples/desktop/hand_tracking
[mediapipe-rust-runner 0.1.0] cargo:rustc-link-search=native=/home/user/code/mediapipe/rust/../bazel-bin/mediapipe/examples/desktop/hand_tracking
[mediapipe-rust-runner 0.1.0] cargo:rustc-link-lib=dylib=hands_pipeline_operator_c_api
[opencv 0.96.0] === Clang: Ubuntu clang version 18.1.3 (1ubuntu1)
[opencv 0.96.0] === Clang command line args: [
[opencv 0.96.0]     "-isystem/usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13",
[opencv 0.96.0]     "-isystem/usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/x86_64-linux-gnu/c++/13",
[opencv 0.96.0]     "-isystem/usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/backward",
[opencv 0.96.0]     "-isystem/usr/lib/llvm-18/lib/clang/18/include",
[opencv 0.96.0]     "-isystem/usr/local/include",
[opencv 0.96.0]     "-isystem/usr/include/x86_64-linux-gnu",
[opencv 0.96.0]     "-isystem/usr/include",
[opencv 0.96.0]     "-I/home/user/.cache/bazel/_bazel_user/d50e0665cca035469d1d0e1467b61c11/execroot/mediapipe/bazel-out/k8-opt/bin/third_party/opencv_cmake/include/opencv4",
[opencv 0.96.0]     "-F/home/user/.cache/bazel/_bazel_user/d50e0665cca035469d1d0e1467b61c11/execroot/mediapipe/bazel-out/k8-opt/bin/third_party/opencv_cmake/include/opencv4",
[opencv 0.96.0]     "-I/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp",
[opencv 0.96.0]     "-F/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp",
[opencv 0.96.0]     "-DOCVRS_PARSING_HEADERS",
[opencv 0.96.0]     "-includeocvrs_common.hpp",
[opencv 0.96.0]     "-std=c++17",
[opencv 0.96.0] ]
[opencv 0.96.0] === Using environment job server with the the amount of available jobs: 28
[opencv 0.96.0] === Generating 0 modules
[opencv 0.96.0] === Total binding generation time: 12.118µs
[opencv 0.96.0] === Total binding collection time: 52.751µs
[opencv 0.96.0] OPT_LEVEL = Some(0)
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_ENCODED_RUSTFLAGS = Some()
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXX_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXX_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXX_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXX_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXX
[opencv 0.96.0] HOST_CXX = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXX
[opencv 0.96.0] CXX = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] RUSTC_WRAPPER = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] DEBUG = Some(true)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
[opencv 0.96.0] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
[opencv 0.96.0] cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
[opencv 0.96.0] CRATE_CC_NO_DEFAULTS = None
[opencv 0.96.0] TARGET = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
[opencv 0.96.0] HOST = Some(x86_64-unknown-linux-gnu)
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS
[opencv 0.96.0] CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_CXXFLAGS
[opencv 0.96.0] HOST_CXXFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] CXXFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] CXXFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] === Compiler information: Tool {
[opencv 0.96.0]     path: "c++",
[opencv 0.96.0]     cc_wrapper_path: None,
[opencv 0.96.0]     cc_wrapper_args: [],
[opencv 0.96.0]     args: [
[opencv 0.96.0]         "-O0",
[opencv 0.96.0]         "-ffunction-sections",
[opencv 0.96.0]         "-fdata-sections",
[opencv 0.96.0]         "-fPIC",
[opencv 0.96.0]         "-gdwarf-4",
[opencv 0.96.0]         "-fno-omit-frame-pointer",
[opencv 0.96.0]         "-m64",
[opencv 0.96.0]         "-std=c++17",
[opencv 0.96.0]         "-I",
[opencv 0.96.0]         "/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp",
[opencv 0.96.0]         "-I",
[opencv 0.96.0]         "/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out",
[opencv 0.96.0]         "-I",
[opencv 0.96.0]         ".",
[opencv 0.96.0]         "-I",
[opencv 0.96.0]         "/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4",
[opencv 0.96.0]         "-Wall",
[opencv 0.96.0]         "-Wextra",
[opencv 0.96.0]         "-Wno-deprecated-declarations",
[opencv 0.96.0]         "-Wno-deprecated-copy",
[opencv 0.96.0]         "-Wno-unused-parameter",
[opencv 0.96.0]         "-Wno-sign-compare",
[opencv 0.96.0]         "-Wno-comment",
[opencv 0.96.0]         "-Wno-uninitialized",
[opencv 0.96.0]         "-Wno-unused-variable",
[opencv 0.96.0]         "-Wno-ignored-qualifiers",
[opencv 0.96.0]         "-Wno-return-type-c-linkage",
[opencv 0.96.0]         "-Wno-overloaded-virtual",
[opencv 0.96.0]         "-Wno-delete-non-virtual-dtor",
[opencv 0.96.0]         "-DOCVRS_FFI_EXPORT_SUFFIX=_0_96_0",
[opencv 0.96.0]         "-DOCVRS_TARGET_OS_WINDOWS=0",
[opencv 0.96.0]     ],
[opencv 0.96.0]     env: [
[opencv 0.96.0]         (
[opencv 0.96.0]             "LC_ALL",
[opencv 0.96.0]             "C",
[opencv 0.96.0]         ),
[opencv 0.96.0]     ],
[opencv 0.96.0]     family: Gnu,
[opencv 0.96.0]     cuda: false,
[opencv 0.96.0]     removed_args: [],
[opencv 0.96.0]     has_internal_target_arg: false,
[opencv 0.96.0] }
[opencv 0.96.0] cargo:rerun-if-env-changed=AR_x86_64-unknown-linux-gnu
[opencv 0.96.0] AR_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=AR_x86_64_unknown_linux_gnu
[opencv 0.96.0] AR_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_AR
[opencv 0.96.0] HOST_AR = None
[opencv 0.96.0] cargo:rerun-if-env-changed=AR
[opencv 0.96.0] AR = None
[opencv 0.96.0] cargo:rerun-if-env-changed=ARFLAGS
[opencv 0.96.0] ARFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=HOST_ARFLAGS
[opencv 0.96.0] HOST_ARFLAGS = None
[opencv 0.96.0] cargo:rerun-if-env-changed=ARFLAGS_x86_64_unknown_linux_gnu
[opencv 0.96.0] ARFLAGS_x86_64_unknown_linux_gnu = None
[opencv 0.96.0] cargo:rerun-if-env-changed=ARFLAGS_x86_64-unknown-linux-gnu
[opencv 0.96.0] ARFLAGS_x86_64-unknown-linux-gnu = None
[opencv 0.96.0] cargo:warning=ar: '/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out/libocvrs.a': No such file
[opencv 0.96.0] 
[opencv 0.96.0] 
[opencv 0.96.0] error occurred in cc-rs: command did not execute successfully (status code exit status: 1): "ar" "s" "/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out/libocvrs.a"
[opencv 0.96.0] 
[opencv 0.96.0] 
warning: opencv@0.96.0: ar: '/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out/libocvrs.a': No such file
error: failed to run custom build command for `opencv v0.96.0`
note: To improve backtraces for build dependencies, set the CARGO_PROFILE_DEV_BUILD_OVERRIDE_DEBUG=true environment variable to enable debug information generation.

Caused by:
  process didn't exit successfully: `CARGO=/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/cargo CARGO_CFG_FEATURE=highgui,imgcodecs,imgproc,videoio CARGO_CFG_PANIC=unwind CARGO_CFG_TARGET_ABI='' CARGO_CFG_TARGET_ARCH=x86_64 CARGO_CFG_TARGET_ENDIAN=little CARGO_CFG_TARGET_ENV=gnu CARGO_CFG_TARGET_FAMILY=unix CARGO_CFG_TARGET_FEATURE=fxsr,sse,sse2 CARGO_CFG_TARGET_HAS_ATOMIC=16,32,64,8,ptr CARGO_CFG_TARGET_OS=linux CARGO_CFG_TARGET_POINTER_WIDTH=64 CARGO_CFG_TARGET_VENDOR=unknown CARGO_CFG_UNIX='' CARGO_ENCODED_RUSTFLAGS='' CARGO_FEATURE_HIGHGUI=1 CARGO_FEATURE_IMGCODECS=1 CARGO_FEATURE_IMGPROC=1 CARGO_FEATURE_VIDEOIO=1 CARGO_MANIFEST_DIR=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0 CARGO_MANIFEST_PATH=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/Cargo.toml CARGO_PKG_AUTHORS='Pro <twisted.fall@gmail.com>:Mathieu Poumeyrol <kali@zoy.org>' CARGO_PKG_DESCRIPTION='Rust bindings for OpenCV' CARGO_PKG_HOMEPAGE='' CARGO_PKG_LICENSE=MIT CARGO_PKG_LICENSE_FILE='' CARGO_PKG_NAME=opencv CARGO_PKG_README=README.md CARGO_PKG_REPOSITORY='https://github.com/twistedfall/opencv-rust' CARGO_PKG_RUST_VERSION=1.81.0 CARGO_PKG_VERSION=0.96.0 CARGO_PKG_VERSION_MAJOR=0 CARGO_PKG_VERSION_MINOR=96 CARGO_PKG_VERSION_PATCH=0 CARGO_PKG_VERSION_PRE='' DEBUG=true HOST=x86_64-unknown-linux-gnu LD_LIBRARY_PATH='/home/user/code/mediapipe/rust/target/debug/deps:/home/user/code/mediapipe/rust/target/debug:/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib:/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib' NUM_JOBS=28 OPENCV_DISABLE_PROBES=pkg_config,cmake,vcpkg_cmake,vcpkg OPENCV_INCLUDE_PATHS=/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4 OPENCV_LINK_LIBS=opencv_core,opencv_imgproc,opencv_imgcodecs,opencv_highgui,opencv_videoio OPENCV_LINK_PATHS=/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib OPT_LEVEL=0 OUT_DIR=/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out PROFILE=debug RUSTC=/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustc RUSTDOC=/home/user/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/bin/rustdoc TARGET=x86_64-unknown-linux-gnu /home/user/code/mediapipe/rust/target/debug/build/opencv-63d6204ba8032838/build-script-build` (exit status: 1)
  --- stdout
  cargo::rustc-check-cfg=cfg(ocvrs_opencv_branch_34)
  cargo::rustc-check-cfg=cfg(ocvrs_opencv_branch_4)
  cargo::rustc-check-cfg=cfg(ocvrs_opencv_branch_5)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_3d)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_alphamat)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_aruco)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_aruco_detector)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_barcode)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_bgsegm)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_bioinspired)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_calib)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_calib3d)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_ccalib)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_core)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudaarithm)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudabgsegm)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudacodec)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudafeatures2d)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudafilters)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudaimgproc)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudalegacy)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudaobjdetect)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudaoptflow)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudastereo)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cudawarping)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_cvv)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_dnn)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_dnn_superres)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_dpm)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_face)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_features)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_features2d)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_flann)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_freetype)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_fuzzy)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_gapi)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_hdf)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_hfs)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_highgui)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_img_hash)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_imgcodecs)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_imgproc)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_intensity_transform)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_line_descriptor)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_mcc)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_ml)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_objdetect)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_optflow)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_ovis)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_phase_unwrapping)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_photo)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_plot)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_quality)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_rapid)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_rgbd)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_saliency)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_sfm)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_shape)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_signal)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_stereo)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_stitching)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_structured_light)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_superres)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_surface_matching)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_text)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_tracking)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_video)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_videoio)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_videostab)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_viz)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_wechat_qrcode)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_xfeatures2d)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_ximgproc)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_xobjdetect)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_xphoto)
  cargo::rustc-check-cfg=cfg(ocvrs_has_module_xstereo)
  cargo::rustc-check-cfg=cfg(ocvrs_has_inherent_feature_opencl)
  cargo::rustc-check-cfg=cfg(ocvrs_has_inherent_feature_cuda)
  cargo::rustc-check-cfg=cfg(ocvrs_has_inherent_feature_hfloat)
  cargo::rustc-check-cfg=cfg(ocvrs_has_inherent_feature_algorithm_hint)
  cargo::rustc-cfg=ocvrs_opencv_branch_4
  cargo::rustc-cfg=ocvrs_has_inherent_feature_hfloat
  cargo::rerun-if-env-changed=OPENCV_PACKAGE_NAME
  cargo::rerun-if-env-changed=OPENCV_PKGCONFIG_NAME
  cargo::rerun-if-env-changed=OPENCV_CMAKE_NAME
  cargo::rerun-if-env-changed=OPENCV_CMAKE_BIN
  cargo::rerun-if-env-changed=OPENCV_VCPKG_NAME
  cargo::rerun-if-env-changed=OPENCV_LINK_LIBS
  cargo::rerun-if-env-changed=OPENCV_LINK_PATHS
  cargo::rerun-if-env-changed=OPENCV_INCLUDE_PATHS
  cargo::rerun-if-env-changed=OPENCV_DISABLE_PROBES
  cargo::rerun-if-env-changed=OPENCV_MSVC_CRT
  cargo::rerun-if-env-changed=OPENCV_CMAKE_TOOLCHAIN_FILE
  cargo::rerun-if-env-changed=OPENCV_CMAKE_ARGS
  cargo::rerun-if-env-changed=CMAKE_PREFIX_PATH
  cargo::rerun-if-env-changed=OpenCV_DIR
  cargo::rerun-if-env-changed=PKG_CONFIG_PATH
  cargo::rerun-if-env-changed=VCPKG_ROOT
  cargo::rerun-if-env-changed=VCPKGRS_DYNAMIC
  cargo::rerun-if-env-changed=VCPKGRS_TRIPLET
  cargo::rerun-if-env-changed=OCVRS_DOCS_GENERATE_DIR
  cargo::rerun-if-env-changed=DOCS_RS
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/dnn.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/ocvrs_common.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/ccalib.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/bioinspired.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/photo.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/face.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/alphamat.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/stitching.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/xfeatures2d.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/core.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/hdf.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/gapi.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/manual-core.cpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/sfm.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/aruco.hpp
  cargo::rerun-if-changed=/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp/videoio.hpp
  cargo::rerun-if-changed=Cargo.toml
  OPT_LEVEL = Some(0)
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_ENCODED_RUSTFLAGS = Some()
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXX_x86_64-unknown-linux-gnu
  CXX_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=CXX_x86_64_unknown_linux_gnu
  CXX_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=HOST_CXX
  HOST_CXX = None
  cargo:rerun-if-env-changed=CXX
  CXX = None
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  RUSTC_WRAPPER = None
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some(true)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  OUT_DIR = Some(/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out)
  cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT
  cargo:rerun-if-env-changed=CRATE_CC_NO_DEFAULTS
  CRATE_CC_NO_DEFAULTS = None
  TARGET = Some(x86_64-unknown-linux-gnu)
  CARGO_CFG_TARGET_FEATURE = Some(fxsr,sse,sse2)
  HOST = Some(x86_64-unknown-linux-gnu)
  cargo:rerun-if-env-changed=CXXFLAGS
  CXXFLAGS = None
  cargo:rerun-if-env-changed=HOST_CXXFLAGS
  HOST_CXXFLAGS = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64_unknown_linux_gnu
  CXXFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=CXXFLAGS_x86_64-unknown-linux-gnu
  CXXFLAGS_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=AR_x86_64-unknown-linux-gnu
  AR_x86_64-unknown-linux-gnu = None
  cargo:rerun-if-env-changed=AR_x86_64_unknown_linux_gnu
  AR_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=HOST_AR
  HOST_AR = None
  cargo:rerun-if-env-changed=AR
  AR = None
  cargo:rerun-if-env-changed=ARFLAGS
  ARFLAGS = None
  cargo:rerun-if-env-changed=HOST_ARFLAGS
  HOST_ARFLAGS = None
  cargo:rerun-if-env-changed=ARFLAGS_x86_64_unknown_linux_gnu
  ARFLAGS_x86_64_unknown_linux_gnu = None
  cargo:rerun-if-env-changed=ARFLAGS_x86_64-unknown-linux-gnu
  ARFLAGS_x86_64-unknown-linux-gnu = None
  cargo:warning=ar: '/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out/libocvrs.a': No such file

  --- stderr
  === Crate version: 0.96.0
  === Environment configuration:
  ===   OPENCV_PACKAGE_NAME = None
  ===   OPENCV_PKGCONFIG_NAME = None
  ===   OPENCV_CMAKE_NAME = None
  ===   OPENCV_CMAKE_BIN = None
  ===   OPENCV_VCPKG_NAME = None
  ===   OPENCV_LINK_LIBS = Some("opencv_core,opencv_imgproc,opencv_imgcodecs,opencv_highgui,opencv_videoio")
  ===   OPENCV_LINK_PATHS = Some("/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib")
  ===   OPENCV_INCLUDE_PATHS = Some("/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4")
  ===   OPENCV_DISABLE_PROBES = Some("pkg_config,cmake,vcpkg_cmake,vcpkg")
  ===   OPENCV_MSVC_CRT = None
  ===   OPENCV_CMAKE_TOOLCHAIN_FILE = None
  ===   OPENCV_CMAKE_ARGS = None
  ===   CMAKE_PREFIX_PATH = None
  ===   OpenCV_DIR = None
  ===   PKG_CONFIG_PATH = None
  ===   VCPKG_ROOT = None
  ===   VCPKGRS_DYNAMIC = None
  ===   VCPKGRS_TRIPLET = None
  ===   OCVRS_DOCS_GENERATE_DIR = None
  ===   DOCS_RS = None
  ===   PATH = Some("/home/user/.cargo/bin:/usr/bin:/home/user/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/snap/bin:/home/user/.local/share/JetBrains/Toolbox/scripts")
  === Enabled features:
  ===   HIGHGUI
  ===   IMGCODECS
  ===   IMGPROC
  ===   VIDEOIO
  === Detected probe priority boost based on environment vars: pkg_config: false, cmake: false, vcpkg: false
  === Probing the OpenCV library in the following order: environment, pkg_config, cmake, vcpkg_cmake, vcpkg
  === Configuring OpenCV library from the environment:
  ===   include_paths: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4
  ===   link_paths: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib
  ===   link_libs: opencv_core,opencv_imgproc,opencv_imgcodecs,opencv_highgui,opencv_videoio
  === Successfully probed using: environment
  === OpenCV library configuration: Library {
      include_paths: [
          "/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4",
      ],
      version: Version {
          major: 4,
          minor: 10,
          patch: 0,
      },
      inherent_features: [
          "openjpeg",
          "jpeg",
          "openexr",
          "png",
          "pthread",
          "pthreads_pf",
          "tiff",
      ],
      cargo_metadata: [
          "cargo::rustc-link-search=/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/lib",
          "cargo::rustc-link-lib=opencv_core",
          "cargo::rustc-link-lib=opencv_imgproc",
          "cargo::rustc-link-lib=opencv_imgcodecs",
          "cargo::rustc-link-lib=opencv_highgui",
          "cargo::rustc-link-lib=opencv_videoio",
      ],
  }
  === Found OpenCV version: 4.10.0 in headers located at: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4
  === Detected OpenCV module header dir at: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2
  === Generating code in: /home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out
  === Placing generated bindings into: /home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out/opencv
  === Using OpenCV headers from: /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4
  === Clang: Ubuntu clang version 18.1.3 (1ubuntu1)
  === Clang command line args: [
      "-isystem/usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13",
      "-isystem/usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/x86_64-linux-gnu/c++/13",
      "-isystem/usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/backward",
      "-isystem/usr/lib/llvm-18/lib/clang/18/include",
      "-isystem/usr/local/include",
      "-isystem/usr/include/x86_64-linux-gnu",
      "-isystem/usr/include",
      "-I/home/user/.cache/bazel/_bazel_user/d50e0665cca035469d1d0e1467b61c11/execroot/mediapipe/bazel-out/k8-opt/bin/third_party/opencv_cmake/include/opencv4",
      "-F/home/user/.cache/bazel/_bazel_user/d50e0665cca035469d1d0e1467b61c11/execroot/mediapipe/bazel-out/k8-opt/bin/third_party/opencv_cmake/include/opencv4",
      "-I/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp",
      "-F/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp",
      "-DOCVRS_PARSING_HEADERS",
      "-includeocvrs_common.hpp",
      "-std=c++17",
  ]
  === Using environment job server with the the amount of available jobs: 28
  === Generating 0 modules
  === Total binding generation time: 12.118µs
  === Total binding collection time: 52.751µs
  === Compiler information: Tool {
      path: "c++",
      cc_wrapper_path: None,
      cc_wrapper_args: [],
      args: [
          "-O0",
          "-ffunction-sections",
          "-fdata-sections",
          "-fPIC",
          "-gdwarf-4",
          "-fno-omit-frame-pointer",
          "-m64",
          "-std=c++17",
          "-I",
          "/home/user/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/opencv-0.96.0/src_cpp",
          "-I",
          "/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out",
          "-I",
          ".",
          "-I",
          "/home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4",
          "-Wall",
          "-Wextra",
          "-Wno-deprecated-declarations",
          "-Wno-deprecated-copy",
          "-Wno-unused-parameter",
          "-Wno-sign-compare",
          "-Wno-comment",
          "-Wno-uninitialized",
          "-Wno-unused-variable",
          "-Wno-ignored-qualifiers",
          "-Wno-return-type-c-linkage",
          "-Wno-overloaded-virtual",
          "-Wno-delete-non-virtual-dtor",
          "-DOCVRS_FFI_EXPORT_SUFFIX=_0_96_0",
          "-DOCVRS_TARGET_OS_WINDOWS=0",
      ],
      env: [
          (
              "LC_ALL",
              "C",
          ),
      ],
      family: Gnu,
      cuda: false,
      removed_args: [],
      has_internal_target_arg: false,
  }


  error occurred in cc-rs: command did not execute successfully (status code exit status: 1): "ar" "s" "/home/user/code/mediapipe/rust/target/debug/build/opencv-7f887854d2d643e0/out/libocvrs.a"

[twistedfall]

Can you show the ls **/*.hpp in the /home/user/code/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4 directory? Generating modules is based only on the "*.hpp" files found in the include directory, the particular built libraries should have no effect on it.

[matanox]

@twistedfall they are all there:

$ ll **/.hpp
-r-xr-xr-x 1 user user 157253 Oct 31 11:13 opencv2/core.hpp
-r-xr-xr-x 1 user user 37533 Oct 31 11:13 opencv2/highgui.hpp*
-r-xr-xr-x 1 user user 28502 Oct 31 11:13 opencv2/imgcodecs.hpp*
-r-xr-xr-x 1 user user 257230 Oct 31 11:13 opencv2/imgproc.hpp*
-r-xr-xr-x 1 user user 3463 Oct 31 11:13 opencv2/opencv.hpp*
-r-xr-xr-x 1 user user 483 Oct 31 11:13 opencv2/opencv_modules.hpp*
-r-xr-xr-x 1 user user 69457 Oct 31 11:13 opencv2/videoio.hpp*

I tested time and again that the solution is to provide a lib that has only non-versioned copies of the opencv .so lib files; only when versioned copies of the same libs are in the same directory, as shown in the directory listing at the top of this issue, it had failed for me.

Of course, those would typically be symlinks but due to my bazel build configuration I was lazy to implement symlinking the lib files, so I use real .so files in my case.

I doubt this is any major issue unless anyone else also bumped into it, though it could be nice to log a bit more of the process which leads to the choice of which packages to build, perhaps, which could serve more use cases than my single issue on a single setup that I'm iterating.

Just because OpenCV is such a huge ball of transitive dependencies that you often need to build from source and/or build with just a partial subset of its gamut of features/libraries, at least in my humble specific experience.

Thank you again for this crate.

[twistedfall]

I've added some increased debug around collecting modules to the debug-modules branch. Will you be able to try it to see what's being reported in the new logs?

=== Enabled OpenCV modules from the environment
=== Found HPP files:
=== Final OpenCV modules to be built:

Additionally can you please post the full build log for the case where you manage to compile the crate correctly? Just trying to see what can be different.

[matanox]

There's an extent of non-determinism working on reproducing it today, which seems to evade me. I could reproduce it only once but not most of the time, unlike before. So I'm closing this till it happens again and I manage to trace what might be different when it happens.

If it happens again, I'll instrument the code inspired by this branch to trace the steps leading to the number of modules it decides to build, in particular where it probably juxtaposes the environment provided modules with the content of bazel-/include/opencv4/opencv2/opencv_modules.hpp which you point out to start with.

Please do reach out in case you needed some testing to make up for your time.

The below is just the said debug branch during the single time that it did manage to reproduce, and I'll just keep monitoring.

---

I fetched that branch and pointed my Cargo.toml to it:

opencv = { path = "/foo/opencv-rust", default-features = false, features = ["imgproc","imgcodecs","highgui","videoio"] }

It builds fine when buliding my application when I provide the unversioned .so lib files only:

/usr/bin/cargo build --color=always --message-format=json-diagnostic-rendered-ansi --profile release
Compiling opencv-binding-generator v0.98.0 (/foo/opencv-rust/binding-generator)
Compiling mediapipe-rust-runner v0.1.0 (/foo/mediapipe/rust)
Compiling opencv v0.96.0 (/foo/opencv-rust)
warning: unused macro definition: `smart_ptr_option_arg`
--> /foo/opencv-rust/src/templ.rs:99:14
|
99 | macro_rules! smart_ptr_option_arg {
|              ^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(unused_macros)]` on by default

warning: this lint expectation is unfulfilled
--> /foo/opencv-rust/src/opencv.rs:21:42
|
21 | #[cfg_attr(ocvrs_opencv_branch_4, expect(deprecated))]
|                                          ^^^^^^^^^^
|
= note: `#[warn(unfulfilled_lint_expectations)]` on by default

I can confirm the debug logging shows up when I provide a path where versioned .so files are placed aside the non-versioned ones:

=== Found OpenCV version: 4.10.0 in headers located at: /foo/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4
=== Detected OpenCV module header dir at: /foo/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2
=== Enabled OpenCV modules from the environment: {
HighGui,
VideoIo,
Core,
ImgCodecs,
ImgProc,
}
=== Found HPP files: [
"/foo/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/opencv_modules.hpp",
]
=== Final OpenCV modules to be built: []
```=== Found OpenCV version: 4.10.0 in headers located at: /foo/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4
=== Detected OpenCV module header dir at: /foo/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2
=== Enabled OpenCV modules from the environment: {
HighGui,
VideoIo,
Core,
ImgCodecs,
ImgProc,
}
=== Found HPP files: [
"/foo/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/opencv_modules.hpp",
]
=== Final OpenCV modules to be built: []

[twistedfall]

This is concerning:

=== Found HPP files: [
"/foo/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/opencv_modules.hpp",
]

That means that the /foo/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/ directory contains only this *.hpp file. That certainly explains the issue as it usually contains the header files for the OpenCV modules like core.hpp, highgui.hpp and so on. Since you're saying that it happens only intermittently, I can suspect some kind of race issue in the build process, but I have 0 familiarity with bazel so I'm not sure how I can be of help here.

[matanox]

Thank you @twistedfall I'll keep this detail in mind, which I didn't notice before (!)

It might have been a case of rust builds triggering a bazel invalidation of its build outputs, falling for sure in the category of a build systems' race condition, due to my fault of letting bazel consider the embedded rust sub-project as a source directory, which I unconfigured last night indeed.

Or some other race condition indeed triggered by the rust build, as it still happened once today too, making me tighten the bazel ignore definition to cover the entire rust project with its IDE-only files as well not just its target/ path.

As it concerns the crate in the general case, should we modify the crate build code to assert there's an hpp file for each package expected from OPENCV_LINK_LIBS? Rather than keeping it populate (thusly effectively silently filtering) the list of packages to link from the set of hpp files found? Possibly, it's a good idea to at least warn, since the silent skipping seems more like an artefact.

I guess there's interaction with the "Cargo Features" behaviors of feature selection so it needs more thought that would match your ideas about overall consistency of use across mainstream scenarios (which cases to fail over, which to warn, and which to notify of).

[twistedfall]

should we modify the crate build code to assert there's an hpp file for each package expected from OPENCV_LINK_LIBS?

Not necessarily, this list can contain more stuff than strictly necessary for the build. E.g. you have set up rather full OPENCV_LINK_LIBS, but experimenting with features or OpenCV build. Failing just because there is extra lib in that var is probably not such a good idea.

I would say that the best indicator of something that went wrong is that your project fails to compile because of the missing functions :) You can't fail more specifically than this. It might be non-trivial to find out what exactly went wrong in that case though, so I'll try to see how logging around this this can be improved.

[matanox]

A minute comment is that on the face of it when an OpenCV lib is specified by OPENCV_LINK_LIBS or its feature name given as a crate feature, and then not found, that should likely always be an explicit error rather than silently avoiding to build it.

At that micro level without me seeing the overall picture, seeking those header files by the list of requested libs rather than deciding what to build by the found files might seem like all else equal the cleaner safer approach ― when OPENCV_LINK_LIBS is used.

Same for features specified in the Cargo.toml specification line for the crate, perhaps.

experiment

Just as an experiment I removed highgui and videoio from the given include path (OPENCV_INCLUDE_PATHS), cleaned and rebuilt, and the error I get is:

error[E0432]: unresolved import opencv::videoio

This is however a less likely scenario, a tad more likely one is that the OpenCV features are fully not there in the OpenCV build, so I remove their libs from under the specified OPENCV_LINK_PATHS too and (as much as this simulates that at all) then the runtime error is already one step clearer:

error while loading shared libraries: libopencv_videoio.so.410: cannot open shared object file: No such file or directory

---

OPENCV_LINK_LIBS = "opencv_core,opencv_imgproc,opencv_imgcodecs,opencv_highgui,opencv_videoio"

Cargo.toml:

opencv = { version = "0.96.0", default-features = false, features = ["imgproc","imgcodecs","highgui","videoio"] }  

---

That said, people highly experienced with builds and linking options would just figure out anyway.

I just stretched if for giving back more feedback, I have no opinion of whether this steers in any right direction. Thanks for the crate again!

[matanox]

Upgraded to 0.97.0 now 🎉

[matanox]

This is concerning:

=== Found HPP files: [
"/foo/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/opencv_modules.hpp",
]

That means that the /foo/mediapipe/rust/../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/ directory contains only this *.hpp file. That certainly explains the issue as it usually contains the header files for the OpenCV modules like core.hpp, highgui.hpp and so on. Since you're saying that it happens only intermittently, I can suspect some kind of race issue in the build process, but I have 0 familiarity with bazel so I'm not sure how I can be of help here.

It appears that when hpp files are symlinks, they won't be picked up by the crate. This is the source of them not being found, rather than them not being there per-se:

$ ll ../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/*.hpp
lrwxrwxrwx 1 user user 143 Nov  3 01:00 ../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/core.hpp -> /home/user/.cache/bazel/_bazel_user/d50e0665cca035469d1d0e1467b61c11/execroot/mediapipe/external/opencv/modules/core/include/opencv2/core.hpp
lrwxrwxrwx 1 user user 149 Nov  3 01:00 ../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/highgui.hpp -> /home/user/.cache/bazel/_bazel_user/d50e0665cca035469d1d0e1467b61c11/execroot/mediapipe/external/opencv/modules/highgui/include/opencv2/highgui.hpp
lrwxrwxrwx 1 user user 153 Nov  3 01:00 ../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/imgcodecs.hpp -> /home/user/.cache/bazel/_bazel_user/d50e0665cca035469d1d0e1467b61c11/execroot/mediapipe/external/opencv/modules/imgcodecs/include/opencv2/imgcodecs.hpp
lrwxrwxrwx 1 user user 149 Nov  3 01:00 ../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/imgproc.hpp -> /home/user/.cache/bazel/_bazel_user/d50e0665cca035469d1d0e1467b61c11/execroot/mediapipe/external/opencv/modules/imgproc/include/opencv2/imgproc.hpp
lrwxrwxrwx 1 user user 132 Nov  3 01:00 ../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/opencv.hpp -> /home/user/.cache/bazel/_bazel_user/d50e0665cca035469d1d0e1467b61c11/execroot/mediapipe/external/opencv/include/opencv2/opencv.hpp
-r-xr-xr-x 1 user user 483 Nov  3 00:56 ../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/opencv_modules.hpp*
lrwxrwxrwx 1 user user 149 Nov  3 01:00 ../bazel-bin/third_party/opencv_cmake/include/opencv4/opencv2/videoio.hpp -> /home/user/.cache/bazel/_bazel_user/d50e0665cca035469d1d0e1467b61c11/execroot/mediapipe/external/opencv/modules/videoio/include/opencv2/videoio.hpp

Only opencv_modules.hpp is not a symlink in there, so it is the only one being read.