Building with colcon (ROS2) about opencv-rust

[twistedfall]

It's difficult to say what exactly goes wrong with your setup, but the crate build script needs a way to find installed OpenCV and if it's installed to a non-standard location without any cmake or pkgconfig files to help it then you'll need to provide the correct paths yourself using the environment variables described here: https://github.com/twistedfall/opencv-rust?tab=readme-ov-file#environment-variables

[Necro-U]

I found this, thank you 😄 .

[Necro-U]

I want to ask sometinhg about setting environments. I created a config.toml file to set these variables. Will this method work? Or will it set the environments after building?

[twistedfall]

The environment variables only have effect during build, not in runtime. The build script only reads variables from the environment, so you need a way to transfer these from cargo.toml to the build script environment. I think cargo can do this for you, but I’ve never tried it myself: https://doc.rust-lang.org/cargo/reference/config.html#env

[Necro-U]

yes I have tried this but it is not working. Still opencv cannot found. Are there any other suggestions ?

[Necro-U]

oh wait i tried on the root folder now it works but i have another issue. It complains about clang;

a libclang shared library is not loaded on this thread.