message: Use standard preprocessor syntax
diff: @@ -84,7 +84,7 @@ struct GemmImplUsingRuy {
  // and GEMMLOWP_NEON is absent, we fall back to Ruy for some quantized
  // kernels. Some Ruy paths are still experimental, so we restrict to reference
  // code in that case.
  -#if not defined(TFLITE_WITH_RUY) && not defined(GEMMLOWP_NEON)
  +#if !defined(TFLITE_WITH_RUY) && !defined(GEMMLOWP_NEON)
  constexpr ruy::Path kRuyPath =
  ruy::Path::kReference | ruy::Path::kStandardCpp;
  #else
  