[HaroldCindy]

There's at least one more to add to the pile, Google's Fuchsia is primarily written in Rust and aims to support the Linux ABI through "starnix".

See https://fuchsia.dev/fuchsia-src/concepts/components/v2/starn... and https://fuchsia.googlesource.com/fuchsia/+/refs/heads/main/s...

[npalli]

No, just download the source and check. It's 14M C/C++ and 4M in Rust. There is another 3.3M in Go and 1.1 in Dart. This is a usual trope that Rust is just about to replace C++ but in fact more and more gets written in C++.

curl -s "https://fuchsia.googlesource.com/fuchsia/+/HEAD/scripts/boot..." | base64 --decode | bash

[plus]

Fuchsia is written in C++, not Rust.

[surajrmal]

It's half-half. The kernel is c++, but it is small relative to the overall OS which is predominantly use space. Growth in rust far outpaces c++ so in a few years c++ will likely be a much smaller fraction. Also, notably, starnix is entirely written in rust.