Building project in compiling opencv-binding-generator fails-Can't get kind of parent for cpp namespace

[SULAPIS]

So i run choco install llvm opencv and then set OPENCV_LINK_LIBS, OPENCV_LINK_PATHS and OPENCV_INCLUDE_PATHS. When i run cargo build, the thread 'main' panicked at internal error, maybe I used the OpenCV API incorrectly, but my code is like this:

use opencv::prelude::*;

fn main() {}

When I use the example code, it also panicked at same error. I don't know what to do.

1. Operating system: Windows 11
2. The way you installed OpenCV: Installed via Chocolatey (choco install llvm opencv) with environment variables added manually.
3. OpenCV version: 4.5.5
4. rustc version: rustc 1.63.0
5. Attach the full output of the following command from your project directory: error.txt

[imxood]

the same error

[aliu]

I was able to fix this by downgrading LLVM to version 14. I guess LLVM 15 is not supported right now.

[ramidzkh]

I also downgraded to LLVM 14 from 15, but then I got some linker error. Was using vcpkg opencv before switching to chocolatey, but same linking error.

[twistedfall]

That's a great clue, I'll investigate, thank you!

[bingxinliu]

I met the same problem. Then, I downgrade to llvm14, but get compile error:

    fatal error: 'opencv2/videoio/registry.hpp' file not found

The error is casued by opencv-0.68.0/src_cpp/videoio.hpp, which says:

#if !(CV_VERSION_MAJOR == 3 && CV_VERSION_MINOR == 2)
	#include <opencv2/videoio/registry.hpp>
#endif

Then I checked the definition of CV_VERSION_MAJOR and CV_VERSION_MINOR, which is fixed set as:

pub const CV_VERSION: &str = "4.6.0";
pub const CV_VERSION_MAJOR: i32 = 4;
pub const CV_VERSION_MINOR: i32 = 6;

// Maybe somewhere else change the value, but I didn't realize.

Considering the problem may caused by version, I download the source code of opencv4.6 and compile it, then all things work.

Hope this info helps.

1. Operating system: Liunx RHEL x86_64
2. The way you installed OpenCV: Manually compile with cmake and export for pkgconfig.
3. OpenCV version: 3.4.0
4. Attach the full output of the following command from your project directory:

output.txt

[twistedfall]

Thanks for all of the reports! This issue have been fixed in the latest release of the opencv-binding-generator crate, just doing a cargo update in the project directory should pull the fixed version (0.47.1).