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28f540f4 | 1 | /* Determine the "endianness" of the CPU. |
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2 | Copyright (C) 1991, 1992, 1997 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. | |
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4 | Contributed by Torbjorn Granlund (tege@sics.se). |
5 | ||
478b92f0 | 6 | The GNU C Library is free software; you can redistribute it and/or |
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7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 10 | |
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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 | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
28f540f4 | 15 | |
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16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
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20 | |
21 | #include <stdio.h> | |
22 | ||
23 | main () | |
24 | { | |
25 | unsigned long int i; | |
26 | ||
27 | if (sizeof (i) != 4) | |
28 | puts ("#error \"Not a 32-bit machine!\""); | |
29 | ||
30 | i = (((((('4' << 8) + '3') << 8) + '2') << 8) + '1'); | |
31 | ||
32 | printf ("#define __BYTE_ORDER %.4s\n", (char *) &i); | |
33 | ||
34 | exit (0); | |
35 | } |