diff --git a/bsp/lpc54608-LPCXpresso/SConstruct b/bsp/lpc54608-LPCXpresso/SConstruct
index fb728723b..a2d74ca04 100644
--- a/bsp/lpc54608-LPCXpresso/SConstruct
+++ b/bsp/lpc54608-LPCXpresso/SConstruct
@@ -12,12 +12,23 @@ from building import *
 
 TARGET = 'rtthread-%s.%s' % (rtconfig.BOARD_NAME, rtconfig.TARGET_EXT)
 
-env = Environment(tools = ['mingw'],
-	AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
-	CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
-	CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
-	AR = rtconfig.AR, ARFLAGS = '-rc',
-	LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+if rtconfig.PLATFORM == 'armcc':
+    env = Environment(tools = ['mingw'],
+        AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+        CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
+        CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
+        AR = rtconfig.AR, ARFLAGS = '-rc',
+        LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS,
+        # overwrite cflags, because cflags has '--C99'
+        CXXCOM = '$CXX -o $TARGET --cpp -c $CXXFLAGS $_CCCOMCOM $SOURCES')
+else:
+    env = Environment(tools = ['mingw'],
+        AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
+        CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
+        CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
+        AR = rtconfig.AR, ARFLAGS = '-rc',
+        LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
+        
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
 Export('RTT_ROOT')
diff --git a/bsp/lpc54608-LPCXpresso/rtconfig.py b/bsp/lpc54608-LPCXpresso/rtconfig.py
index 2a89817b8..a173ba289 100644
--- a/bsp/lpc54608-LPCXpresso/rtconfig.py
+++ b/bsp/lpc54608-LPCXpresso/rtconfig.py
@@ -16,9 +16,9 @@ elif CROSS_TOOL == 'keil':
     PLATFORM    = 'armcc'
     EXEC_PATH   = 'D:/Keil_v5'
 elif CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support iar yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support iar yet!')
+    print('=================================================')
     exit(0)
 
 if os.getenv('RTT_EXEC_PATH'):
@@ -70,12 +70,11 @@ elif PLATFORM == 'armcc':
     CFLAGS = DEVICE + ' --apcs=interwork'
     AFLAGS = DEVICE
     LFLAGS = DEVICE + ' --info sizes --info totals --info unused --info veneers --list rtthread_' + \
-        BOARD_NAME + '.map --scatter rtthread-' + BOARD_NAME + '.sct'
+        BOARD_NAME + '.map --scatter LPC54608J512_flash.scf'
 
     CFLAGS += ' -I' + EXEC_PATH + '/ARM/RV31/INC'
     LFLAGS += ' --libpath ' + EXEC_PATH + '/ARM/RV31/LIB'
-    CXXFLAGS = CFLAGS
-
+    
     EXEC_PATH += '/arm/bin40/'
 
     if BUILD == 'debug':
@@ -83,5 +82,8 @@ elif PLATFORM == 'armcc':
         AFLAGS += ' -g'
     else:
         CFLAGS += ' -O2'
-
+        
+    CXXFLAGS = CFLAGS
+    CFLAGS += ' --c99'
+    
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'