A little experimentation reveals "No."
(Though, I would have hoped you had
already done that.)
However you can use
(...),
to specify your parameters to one xsub and have
that xsub look at how many arguments it has,
and maybe their types, and
call what should be called.
(Of course, see
perlxs.)
Alternately, of course, you could
have multiple xsubs and have a perl function
that would call the right one in the same way.
And, by the way, C does not support overloaded functions.
C++ does, however.
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