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Can octave call a c function?

I have a notebook to solve a differential equation using gsl's rkf45 algorithm. Now I realize that the equation is too stiff and rkf45 is may not be the right algorithm to use. The function I am trying to solve is written in C syntax. I want to try using octave's lsode to solve the same equation since it has a option of solving "stiff" equation. I don't know the jacobian of the equation so I can't use the stiff options in gsl. The problem is that my function is very complicated it took me a long time to type it out. So my question is - is it possible to solve a differential equation in octave where the rhs is written in C syntax.