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-rw-r--r--bits/byteswap.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/bits/byteswap.h b/bits/byteswap.h
index 7866abe..38d8540 100644
--- a/bits/byteswap.h
+++ b/bits/byteswap.h
@@ -1,5 +1,5 @@
/* Macros to swap the order of bytes in integer values.
- Copyright (C) 1997, 1998, 2000, 2001 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1998, 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -21,6 +21,9 @@
# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
#endif
+#ifndef _BITS_BYTESWAP_H
+#define _BITS_BYTESWAP_H 1
+
/* Swap bytes in 16 bit value. */
#ifdef __GNUC__
# define __bswap_16(x) \
@@ -77,3 +80,5 @@ __bswap_32 (unsigned int __bsx)
} \
__r.__ll; }))
#endif
+
+#endif /* _BITS_BYTESWAP_H */