Failed to build gem native extension ruby 2.0 upgrade fastthread - ruby

Question

I am upgrading my system to ruby 2.0 and I have done everything short of throw my computer on the wall. I find it hard to believe that fastthread is the problem. Has anyone else seen this error when running 'bundle install'. Here is my ruby version
ruby -v
ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-darwin12.2.0]
when I try to run rails -v I get this
rails -v
Could not find fastthread-1.0.7 in any of the sources
Run bundle install to install missing gems.
Fetching gem metadata from https://rubygems.org/.........
Fetching gem metadata from https://rubygems.org/..
Resolving dependencies...
Using rake (10.0.3)
Using i18n (0.6.1)
Using multi_json (1.6.1)
Using activesupport (3.2.9)
Using builder (3.0.4)
Using activemodel (3.2.9)
Using erubis (2.7.0)
Using journey (1.0.4)
Using rack (1.4.5)
Using rack-cache (1.2)
Using rack-test (0.6.2)
Using hike (1.2.1)
Using tilt (1.3.3)
Using sprockets (2.2.2)
Using actionpack (3.2.9)
Using mime-types (1.21)
Using polyglot (0.3.3)
Using treetop (1.4.12)
Using mail (2.4.4)
Using actionmailer (3.2.9)
Using arel (3.0.2)
Using tzinfo (0.3.35)
Using activerecord (3.2.9)
Using activeresource (3.2.9)
Using bundler (1.3.0)
Using highline (1.6.15)
Using net-ssh (2.6.5)
Using net-scp (1.1.0)
Using net-sftp (2.1.1)
Using net-ssh-gateway (1.2.0)
Using capistrano (2.14.2)
Using chunky_png (1.2.7)
Using coffee-script-source (1.5.0)
Using execjs (1.4.0)
Using coffee-script (2.2.0)
Using rack-ssl (1.3.3)
Using json (1.7.7)
Using rdoc (3.12.2)
Using thor (0.17.0)
Using railties (3.2.9)
Using coffee-rails (3.2.2)
Using fssm (0.2.10)
Using sass (3.2.6)
Using compass (0.12.2)
Using compass-rails (1.0.3)
Using daemon_controller (1.1.1)
Installing fastthread (1.0.7)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/Users/ben/.rvm/rubies/ruby-2.0.0-p0/bin/ruby extconf.rb
extconf.rb:13:in `block in <main>': Use RbConfig instead of obsolete and deprecated Config.
extconf.rb:13:in `block in <main>': Use RbConfig instead of obsolete and deprecated Config.
make
Makefile:104: *** missing separator. Stop.
Gem files will remain installed in /Users/[me]/.rvm/gems/ruby-2.0.0-p0/gems/fastthread-1.0.7 for inspection.
Results logged to /Users/[me]/.rvm/gems/ruby-2.0.0-p0/gems/fastthread-1.0.7/ext/fastthread/gem_make.out
An error occurred while installing fastthread (1.0.7), and Bundler cannot
continue.
Make sure that `gem install fastthread -v '1.0.7'` succeeds before bundling.
Has anyone else ran into this?
Conents of /Users/[me]/.rvm/gems/ruby-2.0.0-p0/gems/fastthread-1.0.7/ext/fastthread/gem_mak‌​e.out
/Users/[me]/.rvm/rubies/ruby-2.0.0-p0/bin/ruby extconf.rb
extconf.rb:13:in `block in <main>': Use RbConfig instead of obsolete and deprecated Config.
extconf.rb:13:in `block in <main>': Use RbConfig instead of obsolete and deprecated Config.
make
Makefile:104: *** missing separator. Stop.

Answer 1

Phusion Passenger 4 has already solved this by removing the fastthread dependency. The 4.0 betas and RCs install just fine on Ruby 2.0.

Answer 2

If you use Passenger as your webserver you have to have this dependency. See this pull request for the fix: https://github.com/zoltankiss/fastthread/commit/a47a121990cf7d4f31147406c2d379dabc048479
The author of the gem has not yet included this fix. You can require fastthread from https://github.com/zoltankiss/fastthread if you need it. That is who submitted the pull request.