diff --git a/bsp/acm32f4xx-nucleo/rtconfig.py b/bsp/acm32f4xx-nucleo/rtconfig.py
index 589422785b..b63b56b878 100644
--- a/bsp/acm32f4xx-nucleo/rtconfig.py
+++ b/bsp/acm32f4xx-nucleo/rtconfig.py
@@ -20,7 +20,7 @@ if  CROSS_TOOL == 'gcc':
     PLATFORM     = 'gcc'
     EXEC_PATH     = r'/opt/gcc-arm-none-eabi-6_2-2016q4/bin'
 elif CROSS_TOOL == 'keil':
-    PLATFORM    = 'armcc'
+    PLATFORM    = 'armclang'
     EXEC_PATH   = r'D:/Keil_v5'
 elif CROSS_TOOL == 'iar':
     PLATFORM    = 'iar'
@@ -63,7 +63,7 @@ if PLATFORM == 'gcc':
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
-elif PLATFORM == 'armcc':
+elif PLATFORM == 'armclang':
     # toolchains
     CC = 'armclang'
     AS = 'armasm'
@@ -90,6 +90,7 @@ elif PLATFORM == 'armcc':
         CFLAGS += ' -gdwarf-3 -O1'
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'
diff --git a/bsp/gd32e230k-start/rtconfig.py b/bsp/gd32e230k-start/rtconfig.py
index 8356fe0c9c..7f466916bb 100644
--- a/bsp/gd32e230k-start/rtconfig.py
+++ b/bsp/gd32e230k-start/rtconfig.py
@@ -14,7 +14,7 @@ if  CROSS_TOOL == 'gcc':
     PLATFORM    = 'gcc'
     EXEC_PATH   = r'D:/toolchain/gnu_tools_arm_embedded/5.4_2016q3/bin'
 elif CROSS_TOOL == 'keil':
-    PLATFORM 	= 'armcc'
+    PLATFORM 	= 'armclang'
     EXEC_PATH 	= r'C:/Keil_v5'
 elif CROSS_TOOL == 'iar':
     PLATFORM 	= 'iar'
@@ -53,29 +53,37 @@ if PLATFORM == 'gcc':
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
-elif PLATFORM == 'armcc':
+elif PLATFORM == 'armclang':
     # toolchains
-    CC = 'armcc'
+    CC = 'armclang'
+    CXX = 'armclang'
     AS = 'armasm'
     AR = 'armar'
     LINK = 'armlink'
     TARGET_EXT = 'axf'
 
-    DEVICE = ' --cpu Cortex-M23'
-    CFLAGS = DEVICE + ' --apcs=interwork'
-    AFLAGS = DEVICE
-    LFLAGS = DEVICE + ' --info sizes --info totals --info unused --info veneers --list rtthread-gd32.map --scatter gd32_rom.sct'
+    DEVICE = ' --cpu Cortex-M23 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-M23 '
+    CFLAGS += ' -mcpu=cortex-M23 '
+    CFLAGS += ' -c -fno-rtti -funsigned-char -fshort-enums -fshort-wchar '
+    CFLAGS += ' -gdwarf-3 -ffunction-sections '
+    AFLAGS = DEVICE + ' --apcs=interwork '
+    LFLAGS = DEVICE + ' --info sizes --info totals --info unused --info veneers '
+    LFLAGS += ' --list rt-thread-gd32.map '
+    LFLAGS += r' --strict --scatter "gd32_rom.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
 
-    LFLAGS += ' --keep *.o(.rti_fn.*)   --keep *.o(FSymTab) --keep *.o(VSymTab)' 
-
-    EXEC_PATH += '/ARM/ARMCC/bin'
-    print(EXEC_PATH)
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
 
     if BUILD == 'debug':
-        CFLAGS += ' -g -O0'
+        CFLAGS += ' -g -O1' # armclang recommend
         AFLAGS += ' -g'
     else:
         CFLAGS += ' -O2'
+        
+    CXXFLAGS = CFLAGS
+    CFLAGS += ' -std=c99'
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
diff --git a/bsp/stm32/stm32l552-st-nucleo/rtconfig.py b/bsp/stm32/stm32l552-st-nucleo/rtconfig.py
index 4b4a59c98f..d648bba7b8 100644
--- a/bsp/stm32/stm32l552-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32l552-st-nucleo/rtconfig.py
@@ -61,38 +61,6 @@ 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 = ' --cpu Cortex-M33.fp '
-    CFLAGS = '-c ' + DEVICE + ' --apcs=interwork --c99'
-    AFLAGS = DEVICE + ' --apcs=interwork '
-    LFLAGS = DEVICE + ' --info sizes --info totals --info unused --info veneers --list rt-thread.map --strict --scatter "board\linker_scripts\link.sct"'
-    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCC/include'
-    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCC/lib'
-
-    CFLAGS += ' -D__MICROLIB '
-    AFLAGS += ' --pd "__MICROLIB SETA 1" '
-    LFLAGS += ' --library_type=microlib '
-    EXEC_PATH += '/ARM/ARMCC/bin/'
-
-    if BUILD == 'debug':
-        CFLAGS += ' -g -O0'
-        AFLAGS += ' -g'
-    else:
-        CFLAGS += ' -O2'
-
-    CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
-
-    POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
-
 elif PLATFORM == 'armclang':
     # toolchains
     CC = 'armclang'
diff --git a/bsp/stm32/stm32u575-st-nucleo/rtconfig.py b/bsp/stm32/stm32u575-st-nucleo/rtconfig.py
index e402f5a8bc..b14888b024 100644
--- a/bsp/stm32/stm32u575-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32u575-st-nucleo/rtconfig.py
@@ -61,38 +61,6 @@ 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 = ' --cpu Cortex-M33.fp '
-    CFLAGS = '-c ' + DEVICE + ' --apcs=interwork --c99'
-    AFLAGS = DEVICE + ' --apcs=interwork '
-    LFLAGS = DEVICE + ' --info sizes --info totals --info unused --info veneers --list rt-thread.map --strict --scatter "board\linker_scripts\link.sct"'
-    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCC/include'
-    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCC/lib'
-
-    CFLAGS += ' -D__MICROLIB '
-    AFLAGS += ' --pd "__MICROLIB SETA 1" '
-    LFLAGS += ' --library_type=microlib '
-    EXEC_PATH += '/ARM/ARMCC/bin/'
-
-    if BUILD == 'debug':
-        CFLAGS += ' -g -O0'
-        AFLAGS += ' -g'
-    else:
-        CFLAGS += ' -O2'
-
-    CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
-
-    POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
-
 elif PLATFORM == 'armclang':
     # toolchains
     CC = 'armclang'