Building NetBSD on the RISC-V

Required Build Dependencies

• gmake -- For the GNU tools, NetBSD will use it's own make
• bison
• flex
• gsed
• gawk
• autoconf
• automake
• pkg-config
• libtool
• bash

NetBSD pkg_add

pkg_add gmake bison flex gsed gawk autoconf automake pkg-config libtool bash

Fetch the toolchain and simulator source

While the newer version from riscv-tools will probably work, the one that I've tested and built with is can be found in riscv-tools-netbsd. At the very least you'll probably want the netbsd_build.sh script from there to simplify building the tools.

git clone --depth 1 https://github.com/zmcgrew/riscv-tools-netbsd.git ~/riscv-tools-netbsd
cd riscv-tools-netbsd

Setup your path for the tools

You may want to put this in your shell's rc file.

PATH=$PATH:~/.riscv-tools/bin
export PATH

Build the simulator (And the 1st toolchain)

./netbsd_build.sh simulator

Build the toolchain for the kernel

./netbsd_build.sh crosstools

Fetch the NetBSD RISC-V branch

mkdir ~/netbsd && cd ~/netbsd
git clone --depth 1 -b riscv https://github.com/zmcgrew/src.git src
ln -s src/build_riscv.sh ./build_riscv.sh

Build the NetBSD tools

cd ~/netbsd
./build_riscv.sh tools

Build the NetBSD kernel

cd ~/netbsd
./build_riscv.sh kernel=GENERIC

Boot the NetBSD kernel

spike bbl