Building on Ubuntu Linux issue

[lei9wang]

I build mitsuba with scons on Ubuntu 16.04. it display "scons: done building targets." after run commond scons. it looks build successfully. but I check the dependence of mitsuba.so, there are lots of undefined symbol, the log as following:

undefined symbol: PyExc_ImportError (/usr/lib/x86_64-linux-gnu/libboost_python-py27.so.1.58.0) undefined symbol: PyProperty_Type (/usr/lib/x86_64-linux-gnu/libboost_python-py27.so.1.58.0) undefined symbol: PyExc_StopIteration (/usr/lib/x86_64-linux-gnu/libboost_python-py27.so.1.58.0) undefined symbol: PyBool_Type (/usr/lib/x86_64-linux-gnu/libboost_python-py27.so.1.58.0)

fined symbol: PyExc_KeyError (./mitsuba.so) undefined symbol: PyByteArray_Type (./mitsuba.so) undefined symbol: PyExc_BufferError (./mitsuba.so) undefined symbol: PyExc_RuntimeError (./mitsuba.so) undefined symbol: PyDict_Type (./mitsuba.so) undefined symbol: PySlice_Type (./mitsuba.so) undefined symbol: PyList_Type (./mitsuba.so) undefined symbol: PyInt_Type (./mitsuba.so)

so the mitsuba.so is unusable.