wgpu-rs

It's also cargo and the way the build system works. Build scripts in Rust are written in Rust, not some ad-hoc declarative build language. This is a really good decision because you can do insane shit in your build scripts. Also macros, you can generate say bindings relatively easily. I've been doing some cross-platform GPU stuff lately and Rust makes so much of this a breeze. I can't imagine combining C++ projects this easily. I'm really bullish on wgpu (https://github.com/gfx-rs/wgpu-rs). It's the Rust implementation of the WebGPU standard. It goes beyond the web though, it's a really nice GPGPU API to work with and will be a popular API in the next decade.

There is another translation layer called wgpu (https://github.com/gfx-rs/wgpu) being developed as well. It's written in Rust and has bindings for C, Rust (https://github.com/gfx-rs/wgpu-rs), and some initial support for other languages (Python, Julia, Scopes, etc.). Dawn and wgpu have also been collaborating to create a common set of WebGPU headers. The WIP headers are located at https://github.com/webgpu-native/webgpu-headers if you're interested in contributing or following.