title: Implementation of generalized hypergeometric function pFq
body: <p>Is there an implementation callable from C or C++ that allows the evaluation of the <a href="http://en.wikipedia.org/wiki/Generalized_hypergeometric_function" rel="noreferrer">generalized hypergeometric function</a> <code>pFq(a1,...,ap; b1,...,bp; x)</code>?</p>
  
  <p>I tried GSL and Boost, but I don't think the generalized function is available in either of those libraries.</p>