Python-related issues

• If you get the following error during build:

  .../Libraries/PyCA/inc/types/typesPYTHON_wrap.cxx:3478:31: fatal error: numpy/arrayobject.h: No such file or directory
  

  This is most likely due to a missing link to the numpy headers. This is common on arch linux as python2-numpy does not put all the links where they should be. To fix it, run

  sudo ln -s /usr/lib/python2.7/site-packages/numpy/core/include/numpy /usr/include/python2.7/numpy
  

It is also possible that you don't have the numpy headers installed. Make sure python-numpy-devel is installed (not just python-numpy)