How to test if the CPU is DUE or not

Official Hardware Mega Due
1

A neat way to test the CPU would be something like this, but DUE is not declared. How to do this?

#if defined(DUE)
  #define AAA
  #else
  #define BBB
  #endif
2

This seems to work

//  #define (__SAM3X8E__)
  #if defined(__SAM3X8E__)
  char textt[]="due";
  #else
  char textt[]="enotdue";
  #endif
void setup() {
 Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
   Serial.println(textt);
}

I saw a warning about = and ; in defines, luckily I wrote the program first, because it seems to work.

Edit
I saw it here

But there were other hits too