Undefined symbols are typical of linkage that can't locate a particular library. The first step would be to check your path settings and ensure that the libraries you think are needed are actually being found.
The function in question is likely an internal call, for what it's worth, and therefore isn't documented. You could dump the symbols in your libraries and see if it can be found; this is typically done with 'nm' or the compiler under Linux; Mac probably has its own tools to do the same thing.




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