Currently, the Rust compiler (rustc) uses LLVM for code generation,
which limits the supported architectures that can be targeted. In addition,
support for building the kernel with LLVM/Clang varies (please see
Documentation/kbuild/llvm.rst). This support is needed for bindgen
which uses libclang.
Below is a general summary of architectures that currently work. Level of
support corresponds to S values in the MAINTAINERS file.
| Architecture | Level of support | Constraints |
|---|---|---|
um |
Maintained | x86_64 only. |
x86 |
Maintained | x86_64 only. |