This is the RISC-V LLVM C and C++ cross-compiler. It supports ELF/Newlib toolchain only in this moment.
This repository uses submodules. You need the --recursive option to fetch the submodules automatically
$ git clone --recursive https://github.com/andestech/riscv-llvm-toolchain.git
To build the Newlib cross-compiler, pick an install path. If you choose,
say, /opt/riscv, then add /opt/riscv/bin to your PATH now. Then, simply
run the following command:
./configure --prefix=/opt/riscv
make
You should now be able to use riscv-llvm and its cousins.
The build defaults to targetting RV64IMC (64-bit), even on a 32-bit build environment. To build the 32-bit RV32IMC toolchain, use:
./configure --prefix=/opt/riscv --with-arch=rv32imc
make
Supported architectures are rv32i or rv64i plus standard extensions (a)tomics, (m)ultiplication and division.
You can found a LLVM toolchain in your install path, we recommand you use riscv32-elf-unknown-clang (or riscv64-elf-unknown-clang for RV64) to compile program just like riscv32-elf-unknown-gcc instead of use clang directly.
There are a number of additional options that may be passed to configure. See './configure --help' for more details.