I tried to compile the last version on igraph0.6 (from lp) and I had a problem compiling igraph-python with python 2.5 : the 2 macros : Py_TYPE and PyVarObject_HEAD_INIT are not defined in python2.5.
So I just add the following into interfaces/python/src/commun.h : #ifndef Py_TYPE # define Py_TYPE(o) ((o)->ob_type) #endif