Linking error in ecto modules when python3 is installed

[tu-rbo]

I have a problem building a custom ecto module when python3 is installed (in parallel with python2.7) on ubuntu 11.10, using ecto from the ros/fuerte package.

My CMake output when building my custom module (simply the tutorial) reads as follows:

-- The C compiler identification is GNU 4.6.1
-- The CXX compiler identification is GNU 4.6.1
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Found PythonLibs: /usr/lib/python3.2/config/libpython3.2.so (found version "3.2.2")
-- Found Git: /usr/bin/git (found version "1.7.5.4")
-- Looking for include file pthread.h
-- Looking for include file pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found.
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE 
-- Boost version: 1.47.0
-- Found the following Boost libraries:
--   python
--   thread
--   system
-- Configuring done
-- Generating done

However, when I start hello.py I get the following error though:

$ python3.2 hello.py
Traceback (most recent call last):
  File "hello.py", line 3, in <module>
    import ecto_tutorial.tutorial as tutorial
ImportError: /home/shoefer/workspace/my_ecto_project/build/gen/py/ecto_tutorial/tutorial.so: undefined symbol: _ZN5boost6python6detail11init_moduleER11PyModuleDefPFvvE

(the same happens when using the python2.7 executable)

When checking the ecto module using
ld gen/py/ecto_tutorial/tutorial.so
We see the following:
gen/py/ecto_tutorial/tutorial.so: undefined reference to `boost::python::detail::init_module(PyModuleDef&, void (*)())'
which lead me to the following post:
http://stackoverflow.com/questions/5810101/undefined-boost-python-symbol-boostpythondetailinit-module

Temporarily removing python 3.2 from my system does the job for now.