Function gsl_sys::gsl_linalg_mcholesky_rcond

pub unsafe extern "C" fn gsl_linalg_mcholesky_rcond(
    LDLT: *const gsl_matrix, 
    p: *const gsl_permutation, 
    rcond: *mut f64, 
    work: *mut gsl_vector
) -> c_int

This is supported on crate feature v2_2 only.