enum5.c

gcc-you can use this code to learn something about gcc, and inquire further into linux,

// Copyright (C) 2001 Free Software Foundation, Inc.
// Contributed by Ben Elliston <[e-mail]>

// PR 80: Packed enums use minimum required storage.
// excess errors test - XFAIL *-*-*

extern "C" void abort();

enum numbers { one, two, three } __attribute__ ((packed)) nums;
enum colours { red = 1000, green, blue } __attribute__ ((packed)) cols;
enum __attribute__ ((packed)) conditions { fine, rain, cloudy } forecast;

int
main()
{
  if (sizeof (nums) != 1)
    abort ();

  if (sizeof (cols) != 2)
    abort ();

  if (sizeof (forecast) != 1)
    abort ();

  return 0;
}