Function gsl_sys::gsl_multimin_fminimizer_set

pub unsafe extern "C" fn gsl_multimin_fminimizer_set(
    s: *mut gsl_multimin_fminimizer, 
    f: *mut gsl_multimin_function, 
    x: *const gsl_vector, 
    step_size: *const gsl_vector
) -> c_int