#endif
#ifndef BYTE_ORDER
-# ifdef __BYTE_ORDER
+# if defined(_BYTE_ORDER)
+# define BYTE_ORDER _BYTE_ORDER
+# elif defined(__BYTE_ORDER)
# define BYTE_ORDER __BYTE_ORDER
# endif
#endif
#ifndef BIG_ENDIAN
-# ifdef __BIG_ENDIAN
+# if defined(_BIG_ENDIAN)
+# define BIG_ENDIAN _BIG_ENDIAN
+# elif defined(__BIG_ENDIAN)
# define BIG_ENDIAN __BIG_ENDIAN
# endif
#endif