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 |
|---|---|---|
arm |
Maintained | ARMv7 Little Endian only. |
arm64 |
Maintained | Little Endian only. |
loongarch |
Maintained | - |
riscv |
Maintained | riscv64 and LLVM/Clang only. |
um |
Maintained | - |
x86 |
Maintained | x86_64 only. |