[ODE] test_chain1.c fails to link

[Samuli Riihonen]

Hi.

Seems to me that the above-mentioned test-source should be renamed  
to .cpp, since autotools now cause it to be linked using the c-linker  
and not c++.
The error message that is given is:

/usr/bin/ld: Undefined symbols:
__Unwind_Resume

Actually the same symbol is undefined when building libode.dylib (the  
dll).
Anyone with more experience of making dylibs have a clue?

- Samuli