This repository contains scripts to build a Rust toolchain targetting RISC-V RV32E.
The target triplet is: riscv32em-unknown-none-elf
Warning: This was only tested on Linux! Patches welcome if it doesn't work on your OS.
Note: This might require up to ~35GB of disk space to build.
- Run
./01-clone.sh. This will download the necessary sources. - Run
./02-patch.sh. This will patch the sources for RV32E. - Run
./03-rustc-build.sh. This will build the compiler.
Now you have two options:
a) Link the toolchain you've built with rustup using the 04a-link-rustup.sh script.
b) Build (potentially redistributable) dist artifacts with 05-build-dist.sh and install them with 06-install-dist.sh.
In case of (a) you'll have to keep this repository in-place as rustup will link to this directory
to access the toolchain. In case of (b) the toolchain will be permanently installed, after which
you can delete this repository.
After installing prefix your cargo invocations with rustup run rv32e-nightly-2023-04-05-x86_64-unknown-linux-gnu
and add --target=riscv32em-unknown-none-elf. For example this should work:
rustup run rv32e-nightly-2023-04-05-x86_64-unknown-linux-gnu cargo build --target=riscv32em-unknown-none-elf
Only no_std is supported!
You can also build clang if you want. After cloning and patching the sources run 03-clang-build-and-install.sh
to build and install it. The clang binary will be installed to /opt/clang-rv32e/bin/clang.
MIT or Apache-2