gcc/testsuite/gcc.dg/enum1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-std=gnu89" } */
   3
   4 /* In standard C, enumeration constants always have type int.  If they
   5    are not representables are int, they're ill-formed.  In GNU C, we
   6    give such ill-formed constructs well-defined meaning.  Make sure it
   7    works.  */
   8
   9 #include <stdlib.h>
  10
  11 enum foo
  12 {
  13   foo1   = 0,
  14   foo2   = 0xffffffffffffffffULL,
  15   foo3   = 0xf0fffffffffffffeULL
  16 };
  17
  18 int main ()
  19 {
  20   if (sizeof (enum foo) != sizeof (unsigned long long))
  21     abort ();
  22   exit (0);
  23 }