title: gfortran not working on osx yosemite
body: <p>I recently installed fortran on my Macbook Pro mid 2011 that is running OS X Yosemite.  When I try to compile code, I get this: </p>
  
  <p><code>gfortran: warning: couldn’t understand kern.osversion ‘14.0.0 ld: library not found for -lcrt1.o collect2: error: ld returned 1 exit status</code></p>