pub unsafe extern fn ctbtrs_(uplo: *const c_char, trans: *const c_char, diag: *const c_char, n: *const lapack_int, kd: *const lapack_int, nrhs: *const lapack_int, ab: *const lapack_complex_float, ldab: *const lapack_int, b: *mut lapack_complex_float, ldb: *const lapack_int, info: *mut lapack_int)