Install older Ruby versions on a M1 MacBook? - ruby

Question

Installing Ruby 3.0.x works fine on M1 MacBooks using rbenv or asdf. But older versions like 2.7.x and 2.6.x are having various issues. How do I fix them, without installing both x86 and ARM versions of homebrew at the same time?

Answer 1

In order to make installing of Ruby versions 2.6.x or 2.7.x successful on M1 MacBook using either rbenv or asdf (asdf is used in this example) follow these steps:
Upgrade to the latest version of rbenv or asdf-ruby plugin using your prefered installation method. In my case it's asdf-ruby installed over homebrew:
brew upgrade asdf
asdf plugin update ruby
Reinstall the current versions of openssl, readline and ruby-build in order to have the latest versions and configs:
brew uninstall --ignore-dependencies readline
brew uninstall --ignore-dependencies openssl
brew uninstall --ignore-dependencies ruby-build
rm -rf /opt/homebrew/etc/openssl#1.1
brew install -s readline
brew install -s openssl
brew install -s ruby-build
In your shell config .bashrc or .zshrc add the following ENV variables:
export RUBY_CONFIGURE_OPTS="--with-openssl-dir=$(brew --prefix openssl#1.1)"
export LDFLAGS="-L/opt/homebrew/opt/readline/lib:$LDFLAGS"
export CPPFLAGS="-I/opt/homebrew/opt/readline/include:$CPPFLAGS"
export PKG_CONFIG_PATH="/opt/homebrew/opt/readline/lib/pkgconfig:$PKG_CONFIG_PATH"
export optflags="-Wno-error=implicit-function-declaration"
export LDFLAGS="-L/opt/homebrew/opt/libffi/lib:$LDFLAGS"
export CPPFLAGS="-I/opt/homebrew/opt/libffi/include:$CPPFLAGS"
export PKG_CONFIG_PATH="/opt/homebrew/opt/libffi/lib/pkgconfig:$PKG_CONFIG_PATH"
This will ensure that the proper libraries and headers are used during the installations and it will ignore the implicit-function-declaration that is preventing some versions to continue installation. Note that for some other shells like fish the exporting of these variables will be a bit different.
Now start a new terminal session and you can try installing the older ruby versions:
asdf install ruby 2.7.2
asdf install ruby 2.6.5
Note that really old versions below 2.5 might still have issues. Most of the credits go to this Github issue.
UPDATE
For Ruby 2.2 please change the following variable:
export RUBY_CONFIGURE_OPTS=openssl#1.0
And do a
asdf reshim ruby
Thanks #xjlin0 for this update

Answer 2

This simple command helped me
RUBY_CFLAGS="-w" rbenv install 2.5.5

Answer 3

I have faced the same issue for Ruby 2.2.2 and many gems were dependent on that. So I have created a docker container for ubuntu 18.04 and then installed ruby on it. It's working.

Answer 4

For OSX v12.6.1 with frum on M1 Macbook Pro 2021 I used the following exports in ~/.bash_profile after installing ruby-build with brew to successfully build ruby 2.6.5
export optflags="-Wno-error=implicit-function-declaration"
export RUBY_CONFIGURE_OPTS="--with-openssl-dir=$(brew --prefix openssl#3)"
export LDFLAGS="-L/opt/homebrew/opt/readline/lib -L/opt/homebrew/opt/openssl#3/lib"
export CPPFLAGS="-I/opt/homebrew/opt/readline/include -I/opt/homebrew/opt/openssl#3/include"
export PKG_CONFIG_PATH="/opt/homebrew/opt/readline/lib/pkgconfig /opt/homebrew/opt/openssl#3/pkgconfig"

Answer 5

thanks to #orthodox
with rosetta I has brew under arm64. so I uninstall it, and reinstall with x86 and worked
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
echo 'eval "$(/usr/local/bin/brew shellenv)"' >> /Users/mberrueta/.zprofile
eval "$(/usr/local/bin/brew shellenv)"
arch -x86_64 brew uninstall --ignore-dependencies asdf
arch -x86_64 brew install asdf
arch -x86_64 brew upgrade asdf
asdf plugin add ruby https://github.com/asdf-vm/asdf-ruby.git
asdf plugin update ruby
arch -x86_64 brew uninstall --ignore-dependencies --force openssl
arch -x86_64 brew uninstall --ignore-dependencies --force ruby-build
rm -rf /opt/homebrew/etc/openssl#1.1
arch -x86_64 brew install -s readline
arch -x86_64 brew install -s openssl
arch -x86_64 brew install -s ruby-build
export RUBY_CONFIGURE_OPTS="--with-openssl-dir=$(brew --prefix openssl#1.1)"
export LDFLAGS="-L/opt/homebrew/opt/readline/lib:$LDFLAGS"
export CPPFLAGS="-I/opt/homebrew/opt/readline/include:$CPPFLAGS"
export PKG_CONFIG_PATH="/opt/homebrew/opt/readline/lib/pkgconfig:$PKG_CONFIG_PATH"
export optflags="-Wno-error=implicit-function-declaration"
export LDFLAGS="-L/opt/homebrew/opt/libffi/lib:$LDFLAGS"
export CPPFLAGS="-I/opt/homebrew/opt/libffi/include:$CPPFLAGS"
export PKG_CONFIG_PATH="/opt/homebrew/opt/libffi/lib/pkgconfig:$PKG_CONFIG_PATH"
asdf install ruby 2.6.9