Define JV_*PRINTF_LIKE for non-__GNUC__ compilers
diff --git a/src/jv.h b/src/jv.h
index 9e74c9d..da20593 100644
--- a/src/jv.h
+++ b/src/jv.h
@@ -99,6 +99,9 @@
   __attribute__ ((__format__( __printf__, fmt_arg_num, args_num)))
 #define JV_VPRINTF_LIKE(fmt_arg_num) \
   __attribute__ ((__format__( __printf__, fmt_arg_num, 0)))
+#else
+#define JV_PRINTF_LIKE(fmt_arg_num, args_num)
+#define JV_VPRINTF_LIKE(fmt_arg_num)
 #endif