unknown-none-elf - The rustc book (original) (raw)

The rustc book

riscv32{e,em,emc}-unknown-none-elf

Tier: 3

Bare-metal target for RISC-V CPUs with the RV32E, RV32EM and RV32EMC ISAs.

Target maintainers

@hegza

Requirements

The target is cross-compiled, and uses static linking. No external toolchain is required and the default rust-lld linker works, but you must specify a linker script.

Building the target

This target is included in Rust and can be installed via rustup.

Testing

This is a cross-compiled no-std target, which must be run either in a simulator or by programming them onto suitable hardware. It is not possible to run the Rust test-suite on this target.

This target supports C code. If interlinking with C or C++, you may need to useriscv32-unknown-elf-gcc as a linker instead of rust-lld.