diff --git a/bsp/hc32l196/SConstruct b/bsp/hc32l196/SConstruct
index 9782920a33..ba341c62af 100644
--- a/bsp/hc32l196/SConstruct
+++ b/bsp/hc32l196/SConstruct
@@ -2,7 +2,6 @@ import os
 import sys
 import rtconfig
 
-print "############sconstruct##############"
 if os.getenv('RTT_ROOT'):
     RTT_ROOT = os.getenv('RTT_ROOT')
 else:
@@ -38,8 +37,6 @@ Export('RTT_ROOT')
 Export('rtconfig')
 
 # prepare building environment
-print "######################env:"
-print env 
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
 # make a building
diff --git a/bsp/hc32l196/rtconfig.py b/bsp/hc32l196/rtconfig.py
index 2d44172455..cd1789c846 100644
--- a/bsp/hc32l196/rtconfig.py
+++ b/bsp/hc32l196/rtconfig.py
@@ -89,7 +89,6 @@ elif PLATFORM == 'armcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'