--- a/gcc/config/avr/driver-avr.c	Tue May 25 18:58:51 2010 +0900
+++ b/gcc/config/avr/driver-avr.c	Tue Mar 22 17:18:12 2011 +0900
@@ -1,5 +1,5 @@
 /* Subroutines for the gcc driver.
-   Copyright (C) 2009 Free Software Foundation, Inc.
+   Copyright (C) 2009, 2010 Free Software Foundation, Inc.
    Contributed by Anatoly Sokolov <aesok@post.ru>
 
 This file is part of GCC.
@@ -22,7 +22,6 @@
 #include "system.h"
 #include "coretypes.h"
 #include "tm.h"
-#include <stdlib.h>
 
 /* Current architecture.  */
 const struct base_arch_s *avr_current_arch = NULL;
@@ -55,7 +54,7 @@
 avr_device_to_arch (int argc, const char **argv)
 {
   if (0 == argc)
-    return;
+    return NULL;
 
   avr_set_current_device (argv[0]);
 
@@ -71,7 +70,7 @@
   char data_section_start_str[16];
 
   if (0 == argc)
-    return;  
+    return NULL;
 
   avr_set_current_device (argv[0]);
   
@@ -93,7 +92,7 @@
 avr_device_to_startfiles (int argc, const char **argv)
 {
   if (0 == argc)
-    return;
+    return NULL;
 
   avr_set_current_device (argv[0]);
 
@@ -106,7 +105,7 @@
 avr_device_to_devicelib (int argc, const char **argv)
 {
   if (0 == argc)
-    return;
+    return NULL;
 
   avr_set_current_device (argv[0]);