pub unsafe extern fn dsbev_(jobz: *const c_char,
uplo: *const c_char,
n: *const lapack_int,
kd: *const lapack_int,
ab: *mut c_double,
ldab: *const lapack_int,
w: *mut c_double,
z: *mut c_double,
ldz: *const lapack_int,
work: *mut c_double,
info: *mut lapack_int)