#define UCHAR_MAX 255
#endif
+
+/* To match int_eximarith_t. Define in OS/os.h-<your-system> to override. */
+#ifndef EXIM_ARITH_MAX
+# define EXIM_ARITH_MAX ((int_eximarith_t)9223372036854775807LL)
+#endif
+#ifndef EXIM_ARITH_MIN
+# define EXIM_ARITH_MIN (-EXIM_ARITH_MAX - 1)
+#endif
+
/* Some systems have PATH_MAX and some have MAX_PATH_LEN. */
#ifndef PATH_MAX