pub unsafe extern "C" fn LAPACKE_dgtcon(
norm: c_char,
n: lapack_int,
dl: *const c_double,
d: *const c_double,
du: *const c_double,
du2: *const c_double,
ipiv: *const lapack_int,
anorm: c_double,
rcond: *mut c_double,
) -> lapack_int