___eprintf: undefined symbol

[Brad M. Segal]

I'm linking libraries and object files together compiled from ANSI C
and C++ and I'm getting an undefined sysmbol when I try and link.
I've searched EVERYWHERE (at least I think I have) for this symbol name
but cannot find it. The symbol name is  "___eprintf". The symbol has
3 underscores. I'm not referencing it in my file either.

Has anyone seen this before? Where does it come from?
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Brad Segal                                   "So you're having a relationship,
University of Virginia                        with a screwed-up person...
Department of Computer Science                Welcome to Philadelphia!"