enum4.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

// Origin: Mark Mitchell <[e-mail]>
// Special g++ Options: -fshort-enums

enum E { 
  a = -312
};

E e = a;

int main () {
  if ((int) e != -312)
    return 1;
}