+/* In Exim the following two lines have been changed from the original
+ version for portability to C89 compilers that don't support variable
+ argument macros. We don't use these macros so it doesn't matter much what
+ we do with them, but the following will work OK in most situations though
+ it may cause complaints about expressions without side-effects. */
+# define VALGRIND_PRINTF (void)
+# define VALGRIND_PRINTF_BACKTRACE (void)