Update.
[glibc.git] / sysdeps / generic / det_endian.c
blob047323e3226e112cd723fbbeda28765d2a314bd3
1 /* Determine the "endianness" of the CPU.
2 Copyright (C) 1991, 1992, 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Torbjorn Granlund (tege@sics.se).
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 #include <stdio.h>
23 main ()
25 unsigned long int i;
27 if (sizeof (i) != 4)
28 puts ("#error \"Not a 32-bit machine!\"");
30 i = (((((('4' << 8) + '3') << 8) + '2') << 8) + '1');
32 printf ("#define __BYTE_ORDER %.4s\n", (char *) &i);
34 exit (0);