diff -r c1fe0639585a -r 9cd8ee461fd0 scripts/build/libc/newlib.sh
--- a/scripts/build/libc/newlib.sh	Sat Oct 23 00:53:41 2010 +0200
+++ b/scripts/build/libc/newlib.sh	Sat Oct 23 01:21:20 2010 +0200
@@ -68,6 +68,11 @@
 
     CT_DoLog EXTRA "Configuring C library"
 
+    if [ "${CT_LIBC_NEWLIB_IO_C99FMT}" = "y" ]; then
+        newlib_opts+=( "--enable-newlib-io-c99-formats" )
+    else
+        newlib_opts+=( "--disable-newlib-io-c99-formats" )
+    fi
     if [ "${CT_LIBC_NEWLIB_IO_LL}" = "y" ]; then
         newlib_opts+=( "--enable-newlib-io-long-long" )
     else