This corrects the issue detailed here:
https://github.com/jrl-umi3218/dynamic-graph-python/issues/2

Solution found by Florent Lamiraux.

Pointed out by A. Mallet.

Nicolas Mansard authored 13 years ago and Nicolas Mansard committed 12 years ago

  If a signal contains a data deriving from Vector or Matrix, cast content into
  Matrix or Vector using plug machinery.

This commit detect when a statement is evaluated with PyRun_String run
with Py_eval_input. This seems to generate a Syntax Error. Thus if
an exception with Syntax Error is generated with Py_eval_input,
the python interpreter does a second pass with Py_single_input.
The string err is set appropriatly, out has to be checked.

This does not affect the compilation on Ubuntu 10.04.

This reverts commit 8fc08b88.

    Throwing an exception in the C/Python API makes the python interpreter
    terminate. The correct way is to catch C++ exception and to raise python
    errors with the same message.

Remove the command MAKE_DIRECTORY that has been moved in python.cmake

- correct the mkdir command to make it cross-platforms
- remove the '/' in the module name (forbidden in win32 systems)