diff --git a/bsp/stm3210/SConstruct b/bsp/stm3210/SConstruct
index 98de85538de5e88bb6e581fcaeb7ee90c0e3db94..ddb57aee72c2811ac28df2347119baf128581cfd 100644
--- a/bsp/stm3210/SConstruct
+++ b/bsp/stm3210/SConstruct
@@ -9,6 +9,14 @@ import mdk
 target = 'rtthread-stm32'
 projects = []
 
+AddOption('--target',
+                  dest='target',
+                  type='string',
+                  help='set target project: mdk')
+
+if GetOption('target'):
+	SetOption('no_exec', 1)
+
 env = Environment(tools = ['mingw'],
 	AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
 	CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
@@ -39,4 +47,5 @@ TARGET = target + '.' + rtconfig.TARGET_EXT
 env.Program(TARGET, objs)
 env.AddPostAction(TARGET, rtconfig.POST_ACTION)
 
-mdk.MDKProject('project_2.uV2', projects)
+if GetOption('target') == 'mdk':
+	mdk.MDKProject('project_2.uV2', projects)
diff --git a/bsp/stm3210/template.Uv2 b/bsp/stm3210/template.Uv2
index 5fcefa0ccb44e87b0a826980cd1911fa3df82748..86d802dee3dc9434f80039134f542b939b73a4aa 100644
--- a/bsp/stm3210/template.Uv2
+++ b/bsp/stm3210/template.Uv2
@@ -31,7 +31,7 @@ Options 1,0,0  // Target 'RT-Thread STM32'
  EnvReg (˙ST\STM32F10x\)
  OrgReg (˙ST\STM32F10x\)
  TgStat=16
- OutDir (.\)
+ OutDir (.\obj\)
  OutName (rtthread-stm32)
  GenApp=1
  GenLib=0
diff --git a/components/net/lwip/SConscript b/components/net/lwip/SConscript
index e58ee3bf42cee871c47d422c8252075fef7b8e2e..3f0197fd9d6a788ed9e1532ef866e1edb4dd668b 100644
--- a/components/net/lwip/SConscript
+++ b/components/net/lwip/SConscript
@@ -69,7 +69,6 @@ path = [RTT_ROOT + '/components/net/lwip/src',
     RTT_ROOT + '/components/net/lwip/src/netif/ppp']
 
 # group definitions
-print 'LwIP group=='
 group = {}
 group['name'] = 'LwIP'
 group['src'] = File(src_local)
diff --git a/tools/mdk.py b/tools/mdk.py
index f9a5317c7533a9e5c80bcbec2656aa40cc90c47f..e24011040dacaf69aae828c232718d98d798065e 100644
--- a/tools/mdk.py
+++ b/tools/mdk.py
@@ -107,7 +107,7 @@ def MDKProject(target, script):
     # number of groups 
     group_index = 1
     for group in script:
-        print group['name']
+        # print group['name']
 
         # get each include path
         if group.has_key('CPPPATH') and group['CPPPATH']: