#define bswap32(n) (__builtin_constant_p(n) ? bswap32_const(n) : do_bswap32(n))
#define bswap64(n) (__builtin_constant_p(n) ? bswap64_const(n) : do_bswap64(n))
-#if CPU_IS_BIG_ENDIAN
+#if CPU_IS_BIG_ENDIAN()
# define cpu_to_le16(n) ((_force_attr le16)bswap16(n))
# define cpu_to_le32(n) ((_force_attr le32)bswap32(n))
# define cpu_to_le64(n) ((_force_attr le64)bswap64(n))