This provides packages to install the RISC-V toolchain on OS X using Homebrew.

First, install homebrew:

$ ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)"

Get this tap:

$ brew tap riscv/riscv

Build the toolchain:

$ brew install riscv-tools

If you have macOS Catalina (10.15), riscv-tools will be installed from precompiled binaries. If you do not have Catalina, riscv-tools will be built from source. It builds with the default compiler (clang), but you can specify another compiler on the command line. For example:

$ brew install --cc=gcc-9 riscv-tools

You can verify your install was successful by:

$ brew test riscv-tools

This will compile and run a hello world, so it will use all of the components riscv-isa-sim, riscv-pk, and riscv-gnu-toolchain).

To pull in the latest version of a package, you can force an install and compile it yourself by:

$ brew reinstall --build-from-source riscv-fesvr