A little script to install Ruby 3.4.0 with the experimental MMTk garbage collector

install-ruby-3.4.1-mmtk.sh

#!/usr/bin/env zsh -e

version=3.4.1

brew install gmp jemalloc libffi libyaml openssl@3 readline zlib
command -v rustc >/dev/null 2>&1 || brew install rust
mkdir -p "$HOME/src"
cd "$HOME/src"
curl "https://cache.ruby-lang.org/pub/ruby/3.4/ruby-$version.tar.xz" | tar -x
cd "ruby-$version"
mkdir -p "$HOME/.mmtk"
mkdir -p "$HOME/.rubies"
./configure \
    --with-modular-gc="$HOME/.mmtk" \
    --prefix="$HOME/.rubies/ruby-$version" \
    --with-gmp-dir="$(brew --prefix gmp)" \
    --with-libyaml-dir="$(brew --prefix libyaml)" \
    --with-openssl-dir="$(brew --prefix openssl)" \
    --with-readline-dir="$(brew --prefix readline)" \
    --with-zlib-dir="$(brew --prefix zlib)" \
    --with-opt-dir="$(brew --prefix jemalloc)" \
    --with-jemalloc
unset RUBY_GC_LIBRARY
make
make modular-gc MODULAR_GC=mmtk MMTK_BUILD=release
make install

# Outside this script, export the env vars for YJIT and MMTk:
export RUBY_YJIT_ENABLE=1
export RUBY_GC_LIBRARY=mmtk

"$HOME/.rubies/ruby-$version/bin/ruby" -v