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How does it interact with OpenGL? Using C bindings?

We have a syntax extension that uses kronos' xml registry (https://www.opengl.org/registry/#specfiles) to generate symbol a loader (somewhat like GLEW) at compile time. https://github.com/bjz/gl-rs

Thanks for the pointer!

It uses gl-rs. Which auto generates a rust wrapper around the C bindings using a compiler plugin.