title: pybind11 "Python is 64-bit, chosen compiler is 32-bit"
body: <p>I'm trying to compile pybind11 on a Windows machine that has VisualStudio 2015 installed. I also have python 3.5.3 64bit installed, and cmake 2.8.12. I get the error:</p>
  
  <pre><code>CMake Error at tools/FindPythonLibsNew.cmake:122 (message):
    Python config failure: Python is 64-bit, chosen compiler is 32-bit
  Call Stack (most recent call first):
    tools/pybind11Tools.cmake:16 (find_package)
    CMakeLists.txt:28 (include)
  </code></pre>
  
  <p>I did not "choose" the compiler to be 32-bit, and looking at the CMakeLists.txt, I did not find any place to specify which compiler to run.
  So how to I tell pybind11/cmake to compile for 64 bit? </p>