title: ld: library not found for -lgsl
body: <p>I'm working in OSX and I'm attempting to run a make file and when I try I get the following:</p>
  
  <pre><code>ld: library not found for -lgsl
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  make: *** [harm] Error 1
  </code></pre>
  
  <p>Earlier I found out the I needed to get the gsl library and I used mac ports and typed:     </p>
  
  <pre><code>sudo port install gsl
  </code></pre>
  
  <p>into my command line window and it seemed to isntall okay. Is the missing lgsl not configured correctly or does it not come with gsl? I tried googling lgsl but didn't get much. I've only been at programming a few days and I don't know if I was supposed to set a path, or even really how to do that.</p>
  
  <p>Thanks for any help you guys could offer.</p>