title: make: f77: No such file or directory
body: <p>Whilst attempting to make/compile the grafic package, I'm seeing this error after calling the make command within the grafic directory:</p>
  
  <pre><code>f77 -O2 -c grafic1.f
  make: f77: No such file or directory
  make: *** [grafic1.o] Error 1
  </code></pre>
  
  <p>I have XCode and all associated command line tools installed, what could be causing this error?</p>