diff --git a/bsp/ck802/SConstruct b/bsp/ck802/SConstruct
index 1a9f0b761..6c54a5b59 100644
--- a/bsp/ck802/SConstruct
+++ b/bsp/ck802/SConstruct
@@ -2,12 +2,10 @@ import os
 import sys
 import rtconfig
 
-# if os.getenv('RTT_ROOT'):
-    # RTT_ROOT = os.getenv('RTT_ROOT')
-# else:
-RTT_ROOT = os.path.normpath(os.getcwd() + '/../..')
-
-print RTT_ROOT
+if os.getenv('RTT_ROOT'):
+    RTT_ROOT = os.getenv('RTT_ROOT')
+else:
+    RTT_ROOT = os.path.normpath(os.getcwd() + '/../..')
 
 sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools')]
 from building import *
diff --git a/bsp/ck802/rtconfig.py b/bsp/ck802/rtconfig.py
index 2c46a9289..2332c3c31 100644
--- a/bsp/ck802/rtconfig.py
+++ b/bsp/ck802/rtconfig.py
@@ -40,7 +40,7 @@ if PLATFORM == 'gcc':
         DEVICE = ' -mcpu=ck802'
 
     CFLAGS  = DEVICE + '  -DCONFIG_CPU_CK802 -c -g -ffunction-sections -Wall -mistack -mlittle-endian'
-    AFLAGS  = ' -c' + DEVICE + ' -EL -x assembler-with-cpp -save-temps=ojb'
+    AFLAGS  = ' -c' + DEVICE + ' -EL -x assembler-with-cpp'
     LFLAGS  = DEVICE + ' -EL -Wl,--gc-sections,-Map=rtthread_ck802.map,-cref,-u,Reset_Handler -T gcc_csky.ld'
     CPATH   = ''
     LPATH   = ''