pub unsafe extern "C" fn dgtts2_(
itrans: *mut c_int,
n: *mut c_int,
nrhs: *mut c_int,
dl: *mut c_double,
d: *mut c_double,
du: *mut c_double,
du2: *mut c_double,
ipiv: *mut c_int,
b: *mut c_double,
ldb: *mut c_int,
)