static inline u32
crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256])
{
-# if __BYTE_ORDER == __LITTLE_ENDIAN
+# ifdef __LITTLE_ENDIAN
# define DO_CRC(x) crc = tab[0][(crc ^ (x)) & 255] ^ (crc >> 8)
# define DO_CRC4 crc = tab[3][(crc) & 255] ^ \
tab[2][(crc >> 8) & 255] ^ \