Function gsl_sys::gsl_fit_wmul

pub unsafe extern "C" fn gsl_fit_wmul(
    x: *const f64, 
    xstride: usize, 
    w: *const f64, 
    wstride: usize, 
    y: *const f64, 
    ystride: usize, 
    n: usize, 
    c1: *mut f64, 
    cov11: *mut f64, 
    sumsq: *mut f64
) -> c_int