RISC-V GNU Compiler Toolchain

This is the RISC-V C and C++ cross-compiler. It supports two build modes: a generic ELF/Newlib toolchain and a more sophisticated Linux-ELF/glibc toolchain.

Author

Andrew Waterman

Contributors

• Yunsup Lee
• Quan Nguyen
• Albert Ou
• Darius Rad
• Matt Thomas
• ultraembedded (github id)

Prerequisites

Several standard packages are needed to build the toolchain. On Ubuntu, executing the following command should suffice:

$ sudo apt-get install autoconf automake autotools-dev libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo patchutils

On Mac OS, the source and build directories must live in a case-sensitive file system. The simplest approach is to create and mount a new disk image with that property. Make sure that the mount point does not contain spaces.

Installation (Newlib)

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-gcc and its cousins.

Installation (Linux)

To build the Linux 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 linux

Installation (Linux multilib)

To build the Linux cross-compiler with support for both 32-bit and 64-bit, run the following commands:

./configure --prefix=/opt/riscv --enable-multilib
make linux

The multilib compiler will have the prefix riscv-unknown-linux-gnu-, rather than the usual prefix (riscv32-... or riscv64-...).

Advanced Options

There are a number of additional options that may be passed to configure. See './configure --help' for more details.