title: trouble with gem install gsl in fedora 17
body: <p>I have Fedora 17 and I have the following installed: </p>
  
  <pre><code>    ruby-1.9.3.327-19.fc17.x86_64 
      rubygems-1.8.24-1.fc17.noarch 
      gsl-1.15-4.fc17.x86_64 
      gsl-devel-1.15-4.fc17.x86_64 
  </code></pre>
  
  <p>I run </p>
  
  <pre><code>$ gem install gsl 
  </code></pre>
  
  <p>trying to get ruby/gsl. </p>
  
  <p>I get the result </p>
  
  <pre><code>ERROR: Error installing gsl: 
         ERROR: Failed to build gem native extension.
  </code></pre>
  
  <p>plus a big long output. Any suggestions as to what I may be missing? </p>
  
  <p>Any suggestions as to what to do to get gem install gsl to work? </p>