Writing external code that depends on Bob

Created by: anjos

Sometime ago we had the ability to compile external projects against Bob using CMake. Our CMake development environment does export its properties and all those files get installed properly. Remains untested though:

1. How to compile C++ extensions using Bob libraries
2. How to compile Python C++ bindings using Bob libraries and extensions to boost.python (e.g. const_ndarray objects)

This bug should remain opened until we get this functionality back.