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Diffstat (limited to 'sysdeps/m68k/bits/byteswap.h')
-rw-r--r--sysdeps/m68k/bits/byteswap.h13
1 files changed, 6 insertions, 7 deletions
diff --git a/sysdeps/m68k/bits/byteswap.h b/sysdeps/m68k/bits/byteswap.h
index 54ec0d1..41bbe59 100644
--- a/sysdeps/m68k/bits/byteswap.h
+++ b/sysdeps/m68k/bits/byteswap.h
@@ -17,8 +17,9 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-#ifndef _BITS_BYTESWAP_H
-#define _BITS_BYTESWAP_H 1
+#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
+# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
+#endif
/* Swap bytes in 16 bit value. We don't provide an assembler version
because GCC is smart enough to generate optimal assembler output, and
@@ -32,7 +33,7 @@
(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
#if defined __GNUC__ && __GNUC__ >= 2
-#define __bswap_32(x) \
+# define __bswap_32(x) \
__extension__ \
({ unsigned int __v; \
if (__builtin_constant_p (x)) \
@@ -45,12 +46,12 @@
: "0" (x)); \
__v; })
#else
-#define __bswap_32(x) __bswap_constant_32 (x)
+# define __bswap_32(x) __bswap_constant_32 (x)
#endif
#if defined __GNUC__ && __GNUC__ >= 2
/* Swap bytes in 64 bit value. */
-#define __bswap_64(x) \
+# define __bswap_64(x) \
__extension__ \
({ union { unsigned long long int __ll; \
unsigned long int __l[2]; } __v, __r; \
@@ -59,5 +60,3 @@
__r.__l[1] = __bswap_32 (__v.__l[0]); \
__r.__ll; })
#endif
-
-#endif /* bits/byteswap.h */