--- origsrc/ruby-2.2.2/ext/-test-/printf/printf.c	2014-11-03 23:03:50.000000000 -0600
+++ src/ruby-2.2.2/ext/-test-/printf/printf.c	2015-05-20 00:14:25.985606800 -0500
@@ -1,3 +1,4 @@
+#define __STRICT_ANSI__ /* avoid conflicting utoa */
 #include <ruby.h>
 #include <ruby/encoding.h>