Installing an old Ruby on an M1 mac

install-old-ruby.sh

brew install automake bison openssl readline libyaml gdbm libffi openssl@1.1 shared-mime-info
brew tap raggi/ale
brew install openssl-osx-ca
brew services start openssl-osx-ca

export PATH="/opt/homebrew/opt/openssl@1.1/bin:$PATH"
export LDFLAGS='-L/opt/homebrew/opt/openssl@1.1/lib'
export CPPFLAGS='-I/opt/homebrew/opt/openssl@1.1/include'
export PKG_CONFIG_PATH='/opt/homebrew/opt/openssl@1.1/lib/pkgconfig'
export RUBY_CFLAGS=-DUSE_FFI_CLOSURE_ALLOC
export optflags="-Wno-error=implicit-function-declaration"

mkdir /tmp/ruby-2.6.6
cd /tmp/ruby-2.6.6

curl https://cache.ruby-lang.org/pub/ruby/2.6/ruby-2.6.6.tar.xz -o ruby-2.6.6.tar.xz
tar xfz ruby-2.6.6.tar.xz
cd ruby-2.6.6

./configure \
  --prefix=$HOME/.rubies/ruby-2.6.6 \ # Change this to change the final install location
  --build aarch64-apple-darwin20 \
  --with-opt-dir=$(brew --prefix openssl@1.1):$(brew --prefix readline):$(brew --prefix libyaml):$(brew --prefix gdbm):$(brew --prefix libffi)

make -j2
make install

Thanks for making this. I am hoping it will help with some stupid cocoapod shit I am dealing with.

Unfortunately, i have never built ruby like this. I cant seem to get the make -j2 command to work.