title: How to use kernel libcrc32c (or same functions) in userspace programmes?
body: <p>I want to do some CRC check in my own userspace programme. And I find that the kernel crypto lib is already in the system, and come with SSE4.2 support.</p>
  
  <p>I tried to directly <code>#include &lt;linux/crc32c.h&gt;</code> and run gcc with <code>-I/usr/src/linux/include/</code>. However, it doesnot work.</p>
  
  <p>Any way to use some kind of <code>libcrc32c</code> ?</p>