Sorry to break it to everyone but Rust depends on python which depends on perl and openssl and the majority of any lean full source bootstrapped toolchain tree.
replyUnless the gcc rust engine is mature any time soon (lol), we have no path to use rust until very late game in a distro build.
The earliest we can bootstrap a go compiler is about 10 minutes. It builds directly from tinycc. Add 6 hours for our fastest compile of the shortest path to rust, with 192 cores.
I am a rust fan too, but it is the worst language to bootstrap, which is why for systems programming I still must often revert to C to have a small and reviewable and fast to build dependency surface.
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replyRust requires LLVM (or GCC) which requires C++, not just C.
replyLLVM is the default yes, there is also an experimental cranelift backend, which is all Rust. Not sure if it is good enough to build the compiler itself using it.
reply(There is also a GCC backend called codegen_gcc that is pretty far along. And a separate reimplementation of both the frontend and backend using gcc and C++, called gccrs, which is not nearly as far along.)
I'm pretty sure it does not support enough features to build the compiler (e.g. inline asm is not supported at all), and it will also be very, very slow to unusable.
replyMaybe it should be rewritten in Rust then
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