Function gsl_sys::gsl_fit_linear_est

pub unsafe extern "C" fn gsl_fit_linear_est(
    x: f64, 
    c0: f64, 
    c1: f64, 
    cov00: f64, 
    cov01: f64, 
    cov11: f64, 
    y: *mut f64, 
    y_err: *mut f64
) -> c_int