From 6476f8a9403bd3c4b1477a23d0bbba1961ed9f66 Mon Sep 17 00:00:00 2001
From: Bryan Hundven <bryanhundven@gmail.com>
Date: Wed, 13 Jan 2016 06:22:59 -0800
Subject: newlib: add option to enable nano formatted io

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>

diff --git a/config/libc/newlib.in.2 b/config/libc/newlib.in.2
index ed35566..48e5503 100644
--- a/config/libc/newlib.in.2
+++ b/config/libc/newlib.in.2
@@ -55,6 +55,16 @@ config LIBC_NEWLIB_NANO_MALLOC
       with very limited memory.  Note that this implementation does not
       support `--enable-malloc-debugging' any more.
 
+config LIBC_NEWLIB_NANO_FORMATTED_IO
+    bool
+    prompt "Enable Nano Formatted I/O"
+    depends on LIBC_NEWLIB_2_2_or_later
+    help
+      This builds NEWLIB with a special implementation of formatted I/O
+      functions, designed to lower the size of application on small systems
+      with size constraint issues.  This option does not affect wide-char
+      formatted I/O functions.
+
 config LIBC_NEWLIB_EXTRA_CONFIG_ARRAY
     string
     prompt "Extra config for newlib"
diff --git a/scripts/build/libc/newlib.sh b/scripts/build/libc/newlib.sh
index 1b0737e..e70b669 100644
--- a/scripts/build/libc/newlib.sh
+++ b/scripts/build/libc/newlib.sh
@@ -99,6 +99,9 @@ do_libc() {
     if [ "${CT_LIBC_NEWLIB_NANO_MALLOC}" = "y" ]; then
         newlib_opts+=( "--enable-newlib-nano-malloc" )
     fi
+    if [ "${CT_LIBC_NEWLIB_NANO_FORMATTED_IO}" = "y" ]; then
+        newlib_opts+=( "--enable-newlib-nano-formatted-io" )
+    fi
 
     [ "${CT_LIBC_NEWLIB_ENABLE_TARGET_OPTSPACE}" = "y" ] && newlib_opts+=("--enable-target-optspace")
 
-- 
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