gem and/or Ruby on Rails broke all of a sudden, anyone know what happened?

Question

I had a Ruby on Rails app that used to work. I hadn\'t used it in a month or so, but then tried starting it up today with rails s and got the following error—in fa

Answer 1

I had the same problem with XCode 4.3. Try this:

Open XCode > Preferences > Downloads > Install Command Line Tools

Finally run in the terminal:

rvm install 1.9.3 --with-gcc=clang