Error with mysql2 gem loading Rails env on OSX: "Symbol not found: _rb_prohibit_interrupt"

Question

• I'm on OSX 10.7.5

• I'm setting up an existing Rails 3 app

• I've got the 64-bit dmg package of MySQL (v5.5.28) installed

• I've installed the mysql2 gem (v0.3.11) as part of the app bundle

Whenever i try to load the rails env (raking, loading console, etc.), I get this: rake aborted! dlopen(/Users/daretorant/.rvm/gems/ruby-1.9.3-p194@amp/bundler/gems/mysql2-f4d004ac5194/lib/mysql2/mysql2.bundle, 9): Symbol not found: _rb_prohibit_interrupt Referenced from: /Users/daretorant/.rvm/gems/ruby-1.9.3-p194@amp/bundler/gems/mysql2-f4d004ac5194/lib/mysql2/mysql2.bundle Expected in: flat namespace in /Users/daretorant/.rvm/gems/ruby-1.9.3-p194@amp/bundler/gems/mysql2-f4d004ac5194/lib/mysql2/mysql2.bundle - /Users/daretorant/.rvm/gems/ruby-1.9.3-p194@amp/bundler/gems/mysql2-f4d004ac5194/lib/mysql2/mysql2.bundle /Users/daretorant/.rvm/gems/ruby-1.9.3-p194@amp/bundler/gems/mysql2-f4d004ac5194/lib/mysql2.rb:9:in require' /Users/daretorant/.rvm/gems/ruby-1.9.3-p194@amp/bundler/gems/mysql2-f4d004ac5194/lib/mysql2.rb:9:in'

.........

Things I've tried:

• other versions of mysql2

• fresh install of mysql itself

• cleaning my gemset

• cleaning rvm

• pulling hair out

Help?

Answer 1

I have just run into this issue. What had helped me was installing the 64bit version of the mysql2 gem, like this:

$ env ARCHFLAGS="-arch x86_64" gem install mysql2