pub unsafe extern fn LAPACKE_zgttrs(matrix_layout: c_int,
trans: c_char,
n: lapack_int,
nrhs: lapack_int,
dl: *const lapack_complex_double,
d: *const lapack_complex_double,
du: *const lapack_complex_double,
du2: *const lapack_complex_double,
ipiv: *const lapack_int,
b: *mut lapack_complex_double,
ldb: lapack_int)
-> lapack_int