Libprelude compilation error
With GCC4.6 or higher, compiling the libprelude sources causes this problem :
error: 'ptrdiff_t' does not name a type
A quick fix can be to modify _PreludeEasy.cxx, a swig-generated file that can be found in the bindings/python/ directory, by adding #include <cstddef> at the beginning.
To permanently solve the problem, this file should maybe be regenerated from libpreludecpp-python.i with a more recent version of swig.