+/* Newer gcc supports __BYTE_ORDER__. Older gcc doesn't. */
+#ifdef __BYTE_ORDER__
+# define CPU_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+#elif defined(HAVE_CONFIG_H)
+# include "config.h"
+# ifdef WORDS_BIGENDIAN
+# define CPU_IS_BIG_ENDIAN 1
+# else
+# define CPU_IS_BIG_ENDIAN 0
+# endif
+#endif