From 929e027500188ee1857b41c7b652ea0cdbc28b1d Mon Sep 17 00:00:00 2001
From: Bryan Hundven <bryanhundven@gmail.com>
Date: Wed, 13 Jan 2016 06:22:18 -0800
Subject: newlib: add option to enable nano malloc

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

diff --git a/config/libc/newlib.in.2 b/config/libc/newlib.in.2
index b16b23a..ed35566 100644
--- a/config/libc/newlib.in.2
+++ b/config/libc/newlib.in.2
@@ -44,6 +44,17 @@ config LIBC_NEWLIB_ENABLE_TARGET_OPTSPACE
       
       This will compile newlib with -Os.
 
+config LIBC_NEWLIB_NANO_MALLOC
+    bool
+    prompt "Enable Nano Malloc"
+    depends on LIBC_NEWLIB_2_1_or_later
+    help
+      NEWLIB has two implementations of malloc family's functions, one in
+      `mallocr.c' and the other one in `nano-mallocr.c'.  This options
+      enables the nano-malloc implementation, which is for small systems
+      with very limited memory.  Note that this implementation does not
+      support `--enable-malloc-debugging' any more.
+
 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 641ba95..1b0737e 100644
--- a/scripts/build/libc/newlib.sh
+++ b/scripts/build/libc/newlib.sh
@@ -96,6 +96,9 @@ do_libc() {
     else
         newlib_opts+=( "--enable-newlib-supplied-syscalls" )
     fi
+    if [ "${CT_LIBC_NEWLIB_NANO_MALLOC}" = "y" ]; then
+        newlib_opts+=( "--enable-newlib-nano-malloc" )
+    fi
 
     [ "${CT_LIBC_NEWLIB_ENABLE_TARGET_OPTSPACE}" = "y" ] && newlib_opts+=("--enable-target-optspace")
 
-- 
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