[C++-sig] more cross-module problems

[greg Landrum]

Dave's patch cleared up the exception problems I reported yesterday, but 
I've got more cross-module problems to report.

The attached zip file will create a directory called RDTest.  If you 
extract it in $Boost/libs/python, you'll end up with something that can be 
built with bjam.  I apologize in advance for the names of things here...

The Jamfile runs two tests, both of which use multiple modules and explore 
passing objects between them.  One of the tests works on Windows and fails 
on Linux, the other works on Linux and fails on Windows.

The first test (named both_mods in the Jamfile) explores what happens if 
classes with boost::any data members are passed between modules.  This test 
works fine on Windows but fails on Linux with the error:
           RuntimeError: boost::bad_any_cast: failed conversion using 
boost::any_cast

The second test (named CM2_test) creates three modules (modulea, moduleb 
and modulec).  modulea and modulec define simple classes (classA and 
classC) that use STL containers to map std::strings -> integers.  classA 
does this with an std::map and classC does it with an std::vector of 
std::pairs.  As the test demonstrates, both these modules work ok by 
themselves.  moduleb has 2 functions: testCrossA() takes a classA instance 
and gets a property from it; testCrossC() takes a classC instance and gets 
a property.  moduleb works without problems on Linux, but the test using 
classA instances (which carry around std::maps) fails on Windows with the 
dread:
           RuntimeError: unidentifiable C++ exception
error.

Platform notes;
Windows = [Win2K, MSVC v6, python 2.2, boost 1.30.0]
Linux = [RH8.0, g++ 3.2, python 2.2, boost 1.30.0]

Thanks,
-greg
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