mysql2 gem Can't build native extensions

Question

Our intern\'s computer is having problems installing the mysql2 gem. We just upgraded his computer from OS X 10.6 to 10.8 (Mountain Lion). I have tried installing mysql th

Answer 1

I solved this by:

1. Installing homebrew ruby <(curl -fsSk https://raw.github.com/mxcl/homebrew/go) (check out their website for useage http://mxcl.github.com/homebrew/)
2. Following these instructions http://robots.thoughtbot.com/post/27985816073/the-hitchhikers-guide-to-riding-a-mountain-lion
3. Reinstalling mysql with homebrew brew install mysql. (I tried installing mysql by follow these instructions http://erictarn.com/post/28269453881/how-i-installed-mysql-rvm-ruby-and-rails-on-mountain but i ran into issues later so i would recommend reinstalling mysql with homebrew.)
4. Reinstalling rvm and rails and the gems for my project (which included mysql2)

Note: When I tried to build I had a library issue, Library not loaded: libmysqlclient.18.dylib, which was fixed by running sudo ln -s /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/lib/libmysqlclient.18.dylib (refer to Library not loaded: libmysqlclient.16.dylib error when trying to run 'rails server' on OS X 10.6 with mysql2 gem if you get the same issue.)