title: Ubuntu 12.10 - Ruby gem rmagick missing dependency issue
body: <p>Like many others I'm having trouble installing rmagick on Ubuntu when running bundle install. </p>
  
  <p>I get this error on the bundle install command:</p>
  
  <pre><code>Installing rmagick (2.13.1) 
  Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
  
          /usr/local/rvm/rubies/ruby-1.8.7-p371/bin/ruby extconf.rb 
  checking for Ruby version &gt;= 1.8.5... yes
  checking for gcc... yes
  checking for Magick-config... no
  Can't install RMagick 2.13.1. Can't find Magick-config in /usr/local/rvm/gems/ruby-1.8.7-p371/bin:/usr/local/rvm/gems/ruby-1.8.7-p371@global/bin:/usr/local/rvm/rubies/ruby-1.8.7-p371/bin:/usr/local/rvm/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/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/local/rvm/rubies/ruby-1.8.7-p371/bin/ruby
  
  
  Gem files will remain installed in /home/selfsale/.bundler/tmp/2908/gems/rmagick-2.13.1 for inspection.
  Results logged to /home/selfsale/.bundler/tmp/2908/gems/rmagick-2.13.1/ext/RMagick/gem_make.out
  
  An error occurred while installing rmagick (2.13.1), and Bundler cannot continue.
  Make sure that `gem install rmagick -v '2.13.1'` succeeds before bundling.
  </code></pre>
  
  <p>I then did some searching and found some suggestions for adding the missing libs:</p>
  
  <p>sudo apt-get install libmagick9-dev:</p>
  
  <pre><code>Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Package libmagick9-dev is not available, but is referred to by another package.
  This may mean that the package is missing, has been obsoleted, or
  is only available from another source
  However the following packages replace it:
    graphicsmagick-libmagick-dev-compat
  
  E: Package 'libmagick9-dev' has no installation candidate
  </code></pre>
  
  <p>sudo apt-get install graphicsmagick-libmagick-dev-compat:</p>
  
  <pre><code>Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:
  
  The following packages have unmet dependencies:
   graphicsmagick-libmagick-dev-compat : Depends: libgraphicsmagick1-dev but it is not going to be installed
                                         Depends: libgraphicsmagick++1-dev but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.
  </code></pre>
  
  <p>sudo apt-get install libmagickwand-dev:</p>
  
  <pre><code>Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:
  
  The following packages have unmet dependencies:
   libmagickwand-dev : Depends: libmagickcore-dev (= 8:6.6.9.7-5ubuntu3.2) but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.
  </code></pre>
  
  <p>sudo apt-get install libmagickcore-dev:</p>
  
  <pre><code>Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:
  
  The following packages have unmet dependencies:
   libmagickcore-dev : Depends: libbz2-dev but it is not going to be installed
                       Depends: libfreetype6-dev but it is not going to be installed
                       Depends: libpng-dev
                       Depends: librsvg2-dev but it is not going to be installed
                       Depends: libwmf-dev but it is not going to be installed
                       Depends: libx11-dev but it is not going to be installed
                       Depends: libxext-dev but it is not going to be installed
                       Depends: libxt-dev but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.
  </code></pre>
  
  <p>sudo apt-get install libmagick++-dev:</p>
  
  <pre><code>Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:
  
  The following packages have unmet dependencies:
   libmagick++-dev : Depends: libmagickcore-dev (= 8:6.6.9.7-5ubuntu3.2) but it is not going to be installed
                     Depends: libmagickwand-dev (= 8:6.6.9.7-5ubuntu3.2) but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.
  </code></pre>
  
  <p>It seems that any attempt to install the correct packages comes up with this problem.</p>
  
  <p>I've just seen a post about installing imagemagick from source so I'm going to try that, but if anyone has any better ideas I'd love to hear them.</p>
  
  <p>Thanks</p>