title: An error occurred while installing rmagick (2.13.2), and Bundler cannot continue
body: <p><strong>using gem magick' and am using rails 3.1.0</strong></p>
  
  <pre><code>Fetching gem metadata from http://rubygems.org/.........
  
  Fetching additional metadata from http://rubygems.org/..
  
  Resolving dependencies...
  
  
  Using rake (10.1.1)
  Using multi_json (1.8.4)
  Using activesupport (3.1.0)
  Using bcrypt-ruby (3.0.1)
  Using builder (3.0.4)
  Using i18n (0.6.9)
  Using activemodel (3.1.0)
  Using erubis (2.7.0)
  Using rack (1.3.10)
  Using rack-cache (1.0.3)
  Using rack-mount (0.8.3)
  Using rack-test (0.6.2)
  Using hike (1.2.3)
  Using tilt (1.3.7)
  Using sprockets (2.0.4)
  Using actionpack (3.1.0)
  Using mime-types (1.25.1)
  Using polyglot (0.3.4)
  Using treetop (1.4.15)
  Using mail (2.3.3)
  Using actionmailer (3.1.0)
  Using arel (2.2.3)
  Using tzinfo (0.3.38)
  Using activerecord (3.1.0)
  Using activeresource (3.1.0)
  Using ansi (1.4.3)
  Using bundler (1.5.2)
  Using carrierwave (0.5.8)
  Using coffee-script-source (1.7.0)
  Using execjs (2.0.2)
  Using coffee-script (2.2.0)
  Using rack-ssl (1.3.3)
  Using json (1.8.1)
  Using rdoc (3.12.2)
  Using thor (0.14.6)
  Using railties (3.1.0)
  Using coffee-rails (3.1.1)
  Using jquery-rails (3.1.0)
  Using mysql2 (0.3.15)
  Using rails (3.1.0)
  
  
  Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
  
  
          /usr/bin/ruby1.9.1 extconf.rb 
  checking for Ruby version &gt;= 1.8.5... yes
  checking for gcc... yes
  
  checking for Magick-config... no
  Can't install RMagick 2.13.2. Can't find Magick-config in /usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
  
  *** extconf.rb failed ***
  Could not create Makefile due to some reason, probably lack of
  necessary libraries and/or headers.  Check the mkmf.log file for more
  details.  You may need configuration options.
  
  
  Provided configuration options:
  
      --with-opt-dir
      --without-opt-dir
      --with-opt-include
      --without-opt-include=${opt-dir}/include
      --with-opt-lib
      --without-opt-lib=${opt-dir}/lib
      --with-make-prog
      --without-make-prog
      --srcdir=.
      --curdir
      --ruby=/usr/bin/ruby1.9.1
  
  
  Gem files will remain installed in /home/rithujadav/.bundler/tmp/3624/gems/rmagick-2.13.2 for inspection.
  
  Results logged to /home/rithujadav/.bundler/tmp/3624/gems/rmagick-2.13.2/ext/RMagick/gem_make.out
  
  An error occurred while installing rmagick (2.13.2), and Bundler cannot
  continue.
  Make sure that `gem install rmagick -v '2.13.2'` succeeds before bundling.
  </code></pre>