(make sure to read messages and warnings)
Installing used software:
curl -ksSL https://install.smf.sh | sm_curl_command="curl -k" bash -
curl -L https://get.rvm.io | bash
Compiling static ruby:
source ~/.rvm/scripts/rvm
rvm autolibs smf
rvm install 2.1.1 --movable
Ruby is installed in $HOME/.rvm/rubies/ruby-2.1.1/, to package:
rvm prepare 2.1.1
Will generate: ruby-2.1.1.tar.bz2.