1#ifdef __BIG_ENDIAN__
2  #if __BIG_ENDIAN__
3    #define __BYTE_ORDER __BIG_ENDIAN
4  #endif
5#endif /* __BIG_ENDIAN__ */
6
7#ifdef __LITTLE_ENDIAN__
8  #if __LITTLE_ENDIAN__
9    #define __BYTE_ORDER __LITTLE_ENDIAN
10  #endif
11#endif /* __LITTLE_ENDIAN__ */
12
13#ifndef __BYTE_ORDER
14  #define __BYTE_ORDER __BIG_ENDIAN
15#endif
16