pub unsafe extern fn sstein_(n: *const lapack_int,
d: *const c_float,
e: *const c_float,
m: *const lapack_int,
w: *const c_float,
iblock: *const lapack_int,
isplit: *const lapack_int,
z: *mut c_float,
ldz: *const lapack_int,
work: *mut c_float,
iwork: *mut lapack_int,
ifail: *mut lapack_int,
info: *mut lapack_int)