title: How to cross compile Python packages with PIP?
body: <p>Is it possible to cross-compile Python packages using PIP?</p>
  
  <p>I'm trying to install several Python packages containing significant portions of C/C++ (scipy/numpy/matplotlib/pynacl) on a Raspberry Pi. Installing these packages on an x86 machine takes under a minute, but because the Pi is so underpowered, and there are no pre-compiled binary packages for ARM, it takes the Pi a couple hours to compile and install everything.</p>
  
  <p>Is there anyway to compile and install these packages into a special virtualenv on an x86 machine, but targeting the ARM platform, and then rsync the virtualenv onto the Pi? Both the Pi and x86 are running Ubuntu 16.</p>