title: Undefined Symbol ___gxx_personality_v0 on link
body: <p>I've been getting this undefined symbol building with this command line:</p>
  
  <pre><code>$ gcc test.cpp
  Undefined symbols:
    "___gxx_personality_v0", referenced from:
    etc...
  </code></pre>
  
  <p>test.cpp is simple and should build fine.  What is the deal?</p>