title: bitcoin cgminer setup arch
body: <p>Trying to set up bitcoin miner on arch linux AMD 64bit.
  I get this error, with cgminer on arch linux:</p>
  
  <pre><code>[2013-03-20 19:52:41] Started cgminer 2.11.3
  [2013-03-20 19:52:41] Error -1001: clGetPlatformsIDs failed (no OpenCL SDK installed?)
  [2013-03-20 19:52:41] clDevicesNum returned error, no GPUs usa
  </code></pre>
  
  <p>I was trying to resolve dependencies, but need help.</p>