diff -r c1fe0639585a -r 9cd8ee461fd0 config/libc/newlib.in.2
--- a/config/libc/newlib.in.2	Sat Oct 23 00:53:41 2010 +0200
+++ b/config/libc/newlib.in.2	Sat Oct 23 01:21:20 2010 +0200
@@ -1,5 +1,12 @@
 # newlib second-part options
 
+config LIBC_NEWLIB_IO_C99FMT
+    bool
+    prompt "Enable IOs on C99 formats"
+    default n
+    help
+      Enable support for IOs on C99 formats.
+
 config LIBC_NEWLIB_IO_LL
     bool
     prompt "Enable IOs on long long"