title: Building PyCrypto with fastmath (gmp or mpir) via pip on Windows
body: <p>I installed PyCrypto on Windows via pip but i was not able to build Crypto.PublicKey._fastmath because GMP was not found.</p>
  
  <p>I know there is a binary version on <a href="http://www.voidspace.org.uk/python/modules.shtml#pycrypto" rel="noreferrer">voidspace</a> but i would like to build the latest version of PyCrypto</p>