From a58593f784d4b84ce09f194c15bc79e20a80aa6a Mon Sep 17 00:00:00 2001
From: bernard <bernard.xiong@gmail.com>
Date: Wed, 25 Jun 2014 17:20:57 +0800
Subject: [PATCH] [libc] code cleanup.

---
 components/libc/armlibc/stubs.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/components/libc/armlibc/stubs.c b/components/libc/armlibc/stubs.c
index 301f654182..d219b3430a 100644
--- a/components/libc/armlibc/stubs.c
+++ b/components/libc/armlibc/stubs.c
@@ -46,8 +46,10 @@ const char __stderr_name[] = "STDERR";
  */
 FILEHANDLE _sys_open(const char *name, int openmode)
 {
+#ifdef RT_USING_DFS    
     int fd;
-
+#endif
+    
     /* Register standard Input Output devices. */
     if (strcmp(name, __stdin_name) == 0)
         return (STDIN);
@@ -91,12 +93,13 @@ int _sys_close(FILEHANDLE fh)
  */
 int _sys_read(FILEHANDLE fh, unsigned char *buf, unsigned len, int mode)
 {
+#ifdef RT_USING_DFS    
     int size;
-
+#endif
+    
     if (fh == STDIN)
     {
         /* TODO */
-
         return 0;
     }
 
@@ -125,8 +128,10 @@ int _sys_read(FILEHANDLE fh, unsigned char *buf, unsigned len, int mode)
  */
 int _sys_write(FILEHANDLE fh, const unsigned char *buf, unsigned len, int mode)
 {
+#ifdef RT_USING_DFS
     int size;
-
+#endif
+    
     if ((fh == STDOUT) || (fh == STDERR))
     {
 #ifndef RT_USING_CONSOLE
-- 
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