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RISC-V Software Ecosystem Overview

This document captures the status of the RISC-V Software Ecosystem. Please add to the list and fix inaccuracies.

We would like to enlist community help for the software ports in the Help Wanted section.


Name Links License Maintainers
DBT-RISE-RISCV github BSD 3-Clause MINRES Technologies
FireSim website, mailing list, github, ISCA 2018 Paper BSD Sagar Karandikar, Howard Mao, Donggyu Kim, David Biancolin, Alon Amid, Berkeley Architecture Research
gem5 SW-dev thread, repository BSD-style Alec Roelke (University of Virginia)
Imperas website Proprietary, models available under Apache 2.0 Imperas
riscvOVPsim github license Imperas
OVPsim website Free for non commercial use, models available under Apache 2.0 Imperas
jor1k website, github BSD 2-Clause Sebastian Macke
Jupiter github GPL-3.0 Andrés Castellanos
MARSS-RISCV github MIT Gaurav N Kothari, Parikshit P Sarnaik, Gokturk Yuksek (State University of New York at Binghamton)
QEMU upstream GPL Sagar Karandikar (University of California, Berkeley), Bastian Koppelmann (University of Paderborn), Alex Suykov, Stefan O'Rear and Michael Clark (SiFive)
RARS github MIT Benjamin Landers
Renode website, github MIT Antmicro
Ripes github MIT Morten Borup Petersen
RISC-V Virtual Prototype website, github MIT Vladimir Herdt (University of Bremen, AGRA)
TinyEMU website MIT Fabrice Bellard
Spike github BSD 3-clause Andrew Waterman & Yunsup Lee (SiFive)
Swerv-ISS github GPL - 3 Joseph Rahmeh (Western Digital)
VLAB VLAB Works Proprietary ASTC

Object toolchain

Name Links License Maintainers
Binutils RISC-V repo, Upstream repos GPLv2 Andrew Waterman, Palmer Dabbelt & Jim Wilson (SiFive)
LLVM GitHub mirror Apache 2.0 with LLVM exception Alex Bradbury (lowRISC)
Cranelift GitHub Apache 2.0 Cranelift core team


Name Links License Maintainers
GDB Upstream GPLv2 Andrew Burgess (Embecosm), Palmer Dabbelt (SiFive)
OpenOCD Upstream repo, RISC-V repo GPLv2 Tim Newsome, Megan Wachs, Palmer Dabbelt (SiFive)
GNU MCU Eclipse OpenOCD Website, GitHub GPLv2 Liviu Ionescu
Ozone - the J-Link Debugger Website SEGGER commercial license (J-Link PLUS) SEGGER
Imperas Multi Processor Debugger Website Imperas Commercial License Imperas
TCF Debugger Website, GitHub Eclipse Distribution License 1.0 (BSD) / Eclipse Public License 1.0 Sanimir Agovic

C compilers and libraries

Name Links License Maintainers
GCC Upstream, RISC-V repository GPLv3 Andrew Waterman (SiFive), Palmer Dabbelt (SiFive), Jim Wilson (SiFive), Kito Cheng (Andes)
GNU MCU Eclipse RISC-V Embedded GCC (riscv-non-embed-gcc) Web, Repository, Build, Binary package installer Eclipse Public License Liviu lonescu
Clang/LLVM Upstream Apache 2.0 Alex Bradbury (lowRISC)
CompCert Upstream INRIA Non-Commercial License Agreement Xavier Leroy
Glibc Upstream, RISC-V repository GPLv2 Palmer Dabbelt (SiFive), Andrew Waterman (SiFive), DJ Delorie (Red Hat), Darius Rad(Bluespec)
Newlib Upstream, RISC-V repository GPLv2 Kito Cheng (Andes)
SEGGER Runtime Library Website SEGGER commercial license SEGGER
Musl - - -

Boot loaders and monitors

Name Links License Maintainers
coreboot Upstream GPLv2 Ron Minnich (Google), Jonathan Neuschäfer
U-Boot Upstream GPLv2 Rick Chen (Andes)
Proxy Kernel/BBL GitHub BSD 3-clause SiFive
OpenSBI GitHub BSD 2-clause Anup Patel

OS and OS kernels

Linux built from source

Name Links License Maintainers
Linux Kernel github, GPLv2 Andrew Waterman (SiFive), Albert Ou (SiFive), Palmer Dabbelt (SiFive)
Yocto Project/OpenEmbedded github MIT Khem Raj
Buildroot Mark Corbin (Embecosm)

Linux distributions

Name Links License Maintainers
Fedora Richard WM Jones, Stefan O’Rear, David Abdurachmanov
Debian debian wiki,,, Annc Manuel A. Fernandez Montecelo
OpenMandriva, Bernhard "Bero" Rosenkränzer
openSUSE Andreas Schwab (SUSE)
Gentoo github Palmer Dabbelt (University of California, Berkeley)
Parabola GNU/Linux-libre github, Andreas Grapentin (University of Potsdam, HPI)
januslinux github nee-san

Real-time Operating Systems

Name Links License Maintainers
embOS Website, RISC-V port SEGGER commercial license, free for non-commercial use SEGGER
RTEMS, Hesham Almatary
FreeRTOS sourceforge AWS
Zephyr github, docs Karol Gugala (Antmicro), Peter Gielda (Antmicro), Nathaniel Graff (SiFive)
Apache Mynewt James Pace, Runtime
OpenWrt github, binary repo Zoltan Herpai
seL4 github, announcement Hesham Almatary and Data61/CSIRO

BSD distributions

Name Links License Maintainers
FreeBSD github,, presentation Ruslan Bukin (FreeBSD)
NetBSD, github Matt Thomas (NetBSD), Reinoud Zandijk (NetBSD)

Compilers and runtimes for other languages

Name Links License Maintainers
Go Upstream, RISC-V repository, Stef's fork BSD 3-clause Benjamin Barenblat (Google), Michael Pratt (Google), Stef O'Rear
Ocaml Upstream, RISC-V repository LGPL Nicolás Ojeda Bär
Maxine VM (Java Virtual Machine) Upstream GPLv2 Maxine team
Jikes RVM (Java Virtual Machine) Upstream Eclipse Public License (EPL) Martin Maas (University of California, Berkeley)
OpenJDK/HotSpot (Java Virtual Machine) ? ? Alexey Baturo, Michael Knysnek, Martin Maas
Free Pascal Upstream ? Jeppe Johansen and others
Nim Upstream MIT Andreas Rumpf and others
Ada (GNAT) Upstream Proprietary AdaCore
Rust Upstream Apache and MIT Rust Project
muForth Upstream ? David Frech
ibForth Upstream GPLv3 Lars Brinkhoff
Mecrisp-Quintis Forth kernel Upstream ? Matthias Koch


Name Links License Maintainers
GNU MCU Eclipse Website, Repositories, Binary distribution EPL-1.0 / various Liviu Ionescu
Embedded Studio Website, RISC-V spec SEGGER commercial license, free for non-commercial use SEGGER


Name Links License Maintainers
emCrypt Website Commercial, free for non-commercial use SEGGER
CoreGuard Website Proprietary Dover Microsystems, Inc.
MultiZone API GitHub ISC Hex Five Security Inc.
Secure IoT Stack GitHub MIT, GPLv2, GPLv3, Evaluation license Hex Five Security Inc.
MultiZone Security TEE & Enclave SDK, Enclave Evaluation license Hex Five Security Inc.
Keystone Enclave Website, Repositories BSD 3-clause Keystone Team
SecureRF Website, SDK Proprietary SecureRF Corp.

Help Wanted

  • V8
  • Node.js
  • Dart