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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/generic/det_endian.c
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initial import
Diffstat (limited to 'sysdeps/generic/det_endian.c')
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1 files changed, 34 insertions, 0 deletions
diff --git a/sysdeps/generic/det_endian.c b/sysdeps/generic/det_endian.c
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+/* Determine the "endianness" of the CPU.
+   Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+   Contributed by Torbjorn Granlund (tege@sics.se).
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <stdio.h>
+
+main ()
+{
+  unsigned long int i;
+
+  if (sizeof (i) != 4)
+    puts ("#error \"Not a 32-bit machine!\"");
+
+  i = (((((('4' << 8) + '3') << 8) + '2') << 8) + '1');
+
+  printf ("#define __BYTE_ORDER %.4s\n", (char *) &i);
+
+  exit (0);
+}