--- config.h	2013-01-11 16:07:16.000000000 -0800
+++ config.h	2013-01-11 16:06:35.000000000 -0800
@@ -523,3 +523,4 @@
 /* Define to empty if the keyword `volatile' does not work. Warning: valid
    code using `volatile' can become incorrect without. Disable with care. */
 /* #undef volatile */
+#define USE_INTERP_RESULT 1