title: CL_DEVICE_NOT_AVAILABLE using Intel Core 2 Duo E8500 CPU
body: <p>I get the error <code>CL_DEVICE_NOT_AVAILABLE</code> when running <a href="https://stackoverflow.com/q/15499533/1397061">this sample code</a>.  However, unlike in that question, my CPU, the Intel Core 2 Duo E8500 CPU, appears to be <a href="http://software.intel.com/en-us/articles/opencl-release-notes#2" rel="nofollow noreferrer">supported</a>.  I've made sure to link against the Intel version of the OpenCL libraries, since I also have the Nvidia libraries installed.  Why is this error occurring?</p>