Calling SML compiled with MLton from C

[klartext]

I want to have a C program calling SML (used as library).
I looked at this:
http://www.mlton.org/CallingFromCToSML
but that is not, what I was looking for.

The example C code contains functions that call SML functions,
but there is no main() in the C file.

What I want to do is: have C functions including the main(), calling the SML-functions.
But my experiments to somehow achieve that did not work - multiple definition of main was one error I got.

Is it possible at all, to call the output of MLton like a static or shared library from a C program (including main())?

If it's possible: where can I find documentation on that?
If it is not possible, will that be possible one day? I would like to ask for that possibility.