RISC-V

More information on: RISC-V Cross Compilation

Install

Add cross compile tools to

# Debian
apt-get install gcc-riscv64-linux-gnu

# MacOS
brew tap riscv/riscv && brew install --cc=gcc-10 riscv-tools

Tier 3 target with no_std support

rustup target add riscv32imac-unknown-none-elf
rustup target add riscv32i-unknown-none-elf

Tier 2 target with std support

rustup target add riscv64gc-unknown-linux-gnu

Compile

rustc

# compile for riscv target
rustc --target riscv32imac-unknown-none-elf <ifname>.rs
rustc --target riscv64gc-unknown-linux-gnu <ifname>.rs

# compile and get assembler code
rustc --target riscv32i-unknown-none-elf --emit asm <ifname>.rs
rustc --target riscv64gc-unknown-linux-gnu --emit asm <ifname>.rs

cargo

cargo rustc --target riscv32imac-unknown-none-elf -- --emit asm
cargo rustc --target riscv64gc-unknown-linux-gnu -- --emit asm

Check

Check if the architecture is for riscv target

readelf -h <binfname> | grep "Machine"