#ifndef _BITS_ENDIANNESS_H #define _BITS_ENDIANNESS_H 1 #ifndef _BITS_ENDIAN_H # error "Never use <bits/endianness.h> directly; include <endian.h> instead." #endif /* i386/x86_64 are little-endian. */ #define __BYTE_ORDER __LITTLE_ENDIAN #endif /* bits/endianness.h */