Installing Ruby: cannot load such file -- [ openssl | zlib ]

If you like me, installed Ruby by compiling from source code manually, and found that this 2 errors when trying to install bundler

• cannot load such file -- openssl
• cannot load such file -- zlib

You missed configure make to compile with those 2 libraries. Follow these steps to fix this issue.

1. Remove the installed Ruby with make clean
2. Install libssl-dev with your OS's package manager of choice. E.g. apt-get install libssl-dev
3. Install zlib1g-dev with your OS's package manager of choice. E.g. apt-get install zlib1g-dev
4. Config make file to include openssl by go to ext/openssl and run ruby extconf.rb
5. Config make file to include zlib by go to ext/zlib and run ruby extconf.rb
6. Go back to ruby source code directory run make && make install
7. You should be able to successfully run gem install bundler

You can also do the same thing for readline. Install libreadline-dev and run extconf.rb in ext/readline

Tested with ruby 2.0.0p247

Credit:

• http://askubuntu.com/questions/261914/install-ruby-2-0-with-openssl-and-readline-support
• http://stackoverflow.com/questions/769496/ubuntu-noob-rails-install-fails-on-zlib