diff --git a/bsp/imx6ul/rtconfig.py b/bsp/imx6ul/rtconfig.py
index 3dcd1ca04cf01aef50c23b7b36758241ee559ed9..2c08665920bdd2783ee941a6e3c1a332a6888cdd 100644
--- a/bsp/imx6ul/rtconfig.py
+++ b/bsp/imx6ul/rtconfig.py
@@ -8,15 +8,12 @@ CROSS_TOOL='gcc'
 if os.getenv('RTT_CC'):
     CROSS_TOOL = os.getenv('RTT_CC')
 
-if  CROSS_TOOL == 'gcc':
-    PLATFORM 	= 'gcc'
-    EXEC_PATH   = '/opt/gcc-arm-none-eabi-4_8-2014q1_gri/bin'
-elif CROSS_TOOL == 'keil':
-    PLATFORM 	= 'armcc'
-    EXEC_PATH 	= 'C:/Keil'
+# only support GNU GCC compiler.
+PLATFORM  = 'gcc'
+EXEC_PATH = '/opt/gcc-arm-none-eabi-4_8-2014q1_gri/bin'
 
 if os.getenv('RTT_EXEC_PATH'):
-	EXEC_PATH = os.getenv('RTT_EXEC_PATH')
+    EXEC_PATH = os.getenv('RTT_EXEC_PATH')
 
 BUILD = 'debug'
 
@@ -54,48 +51,3 @@ if PLATFORM == 'gcc':
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' +\
                   SIZE + ' $TARGET \n'
-
-elif PLATFORM == 'armcc':
-    # toolchains
-    CC = 'armcc'
-    CXX = 'armcc'
-    AS = 'armasm'
-    AR = 'armar'
-    LINK = 'armlink'
-    TARGET_EXT = 'axf'
-
-    DEVICE = ' --device DARMP'
-    CFLAGS = DEVICE + ' --apcs=interwork'
-    AFLAGS = DEVICE
-    LFLAGS = DEVICE + ' --info sizes --info totals --info unused --info veneers --list rtthread-imx6.map --scatter imx6.sct'
-
-    CFLAGS += ' -I' + EXEC_PATH + '/ARM/RV31/INC'
-    LFLAGS += ' --libpath ' + EXEC_PATH + '/ARM/RV31/LIB'
-
-    EXEC_PATH += '/arm/bin40/'
-
-    if BUILD == 'debug':
-        CFLAGS += ' -g -O0'
-        AFLAGS += ' -g'
-    else:
-        CFLAGS += ' -O2'
-
-    POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
-
-elif PLATFORM == 'iar':
-    # toolchains
-    CC = 'iccarm'
-    AS = 'iasmarm'
-    AR = 'iarchive'
-    LINK = 'ilinkarm'
-    TARGET_EXT = 'out'
-
-    DEVICE = ' --cpu DARMP'
-
-    CFLAGS = ''
-    AFLAGS = ''
-    LFLAGS = ' --config imx6.icf'
-
-    EXEC_PATH += '/arm/bin/'
-    RT_USING_MINILIBC = False
-    POST_ACTION = ''