Function gsl_sys::gsl_min_fminimizer_set

pub unsafe extern "C" fn gsl_min_fminimizer_set(
    s: *mut gsl_min_fminimizer, 
    f: *mut gsl_function, 
    x_minimum: f64, 
    x_lower: f64, 
    x_upper: f64
) -> c_int