[update] support armclang

bsp/at91sam9260/platform/SConscript

@@ -6,7 +6,7 @@ cwd  = GetCurrentDir()
 CPPPATH = [cwd]
 
 # The set of source files associated with this SConscript file.
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
 	src = Glob('*.c') + Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

bsp/at91sam9g45/platform/SConscript

@@ -6,7 +6,7 @@ cwd  = GetCurrentDir()
 CPPPATH = [cwd]
 
 # The set of source files associated with this SConscript file.
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
 	src = Glob('*.c') + Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

bsp/bluetrum/libcpu/cpu/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

bsp/imx6sx/cortex-a9/cpu/SConscript

@@ -9,7 +9,7 @@ if rtconfig.PLATFORM == 'iar':
         src += Glob('*_iar.S')
 elif rtconfig.PLATFORM == 'gcc':
         src += Glob('*_gcc.S')
-elif rtconfig.PLATFORM == 'armcc':
+elif rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
         src += Glob('*_rvds.S')
 
 group = DefineGroup('CPU', src, depend = [''], CPPPATH = CPPPATH)

bsp/qemu-vexpress-gemini/cpu/SConscript

@@ -9,7 +9,7 @@ if rtconfig.PLATFORM == 'iar':
         src += Glob('*_iar.S')
 elif rtconfig.PLATFORM == 'gcc':
         src += Glob('*_gcc.S')
-elif rtconfig.PLATFORM == 'armcc':
+elif rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
         src += Glob('*_rvds.S')
 
 group = DefineGroup('CPU', src, depend = [''], CPPPATH = CPPPATH)

bsp/stm32/libraries/templates/stm32f0xx/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M0 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m0 '
+    CFLAGS += ' -mcpu=cortex-m0 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/libraries/templates/stm32f10x/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M1.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m0 '
+    CFLAGS += ' -mcpu=cortex-m0 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/libraries/templates/stm32f2xx/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/libraries/templates/stm32f3xx/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/libraries/templates/stm32f4xx/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/libraries/templates/stm32f7xx/rtconfig.py

@@ -92,6 +92,40 @@ elif PLATFORM == 'armcc':
     
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp.sp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m7 '
+    CFLAGS += ' -mcpu=cortex-m7 -mfpu=fpv5-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/libraries/templates/stm32l1xx/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/libraries/templates/stm32l4xx/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/libraries/templates/stm32mp1xx/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/libraries/templates/stm32wbxx/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f072-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M0 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m0 '
+    CFLAGS += ' -mcpu=cortex-m0 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f091-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f103-atk-nano/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M1.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m0 '
+    CFLAGS += ' -mcpu=cortex-m0 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f103-atk-warshipv3/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f103-blue-pill/rtconfig.py

@@ -94,6 +94,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f103-dofly-M3S/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f103-dofly-lyc8/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f103-fire-arbitrary/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f103-gizwits-gokitv21/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f103-hw100k-ibox/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f103-onenet-nbiot/rtconfig.py

@@ -94,6 +94,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f103-yf-ufun/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f107-uc-eval/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f207-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M3 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m3 '
+    CFLAGS += ' -mcpu=cortex-m3 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f302-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f401-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f405-smdz-breadfruit/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f407-armfly-v5/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f407-atk-explorer/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f407-robomaster-c/rtconfig.py

@@ -92,6 +92,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f407-st-discovery/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f410-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f411-atk-nano/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f411-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f411-weact-MiniF4/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f413-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f427-robomaster-a/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f429-armfly-v6/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f429-atk-apollo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f429-fire-challenger/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f429-st-disco/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f446-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f469-st-disco/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f746-st-disco/rtconfig.py

@@ -97,6 +97,40 @@ elif PLATFORM == 'armcc':
     
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m7 '
+    CFLAGS += ' -mcpu=cortex-m7 -mfpu=fpv5-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f746-st-nucleo/rtconfig.py

@@ -99,6 +99,40 @@ elif PLATFORM == 'armcc':
     
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m7 '
+    CFLAGS += ' -mcpu=cortex-m7 -mfpu=fpv5-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f767-atk-apollo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
     
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp.sp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m7 '
+    CFLAGS += ' -mcpu=cortex-m7 -mfpu=fpv5-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f767-fire-challenger-v1/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp.sp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m7 '
+    CFLAGS += ' -mcpu=cortex-m7 -mfpu=fpv5-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f767-st-nucleo/rtconfig.py

@@ -99,6 +99,40 @@ elif PLATFORM == 'armcc':
     
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp.sp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m7 '
+    CFLAGS += ' -mcpu=cortex-m7 -mfpu=fpv5-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32f769-st-disco/rtconfig.py

@@ -92,6 +92,40 @@ elif PLATFORM == 'armcc':
     
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp.sp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m7 '
+    CFLAGS += ' -mcpu=cortex-m7 -mfpu=fpv5-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32g070-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M0 '
+    CFLAGS = ' --target=arm-arm-none-eabi --mcpu=cortex-m0plus '
+    CFLAGS += ' -mcpu=cortex-m0plus '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32g071-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M0 '
+    CFLAGS = ' --target=arm-arm-none-eabi --mcpu=cortex-m0plus '
+    CFLAGS += ' -mcpu=cortex-m0plus '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32g431-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32h743-armfly-V7/rtconfig.py

@@ -94,6 +94,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp.sp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-M7 '
+    CFLAGS += ' -mcpu=cortex-M7 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32h743-atk-apollo/rtconfig.py

@@ -94,6 +94,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp.sp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-M7 '
+    CFLAGS += ' -mcpu=cortex-M7 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32h743-st-nucleo/rtconfig.py

@@ -94,6 +94,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp.sp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-M7 '
+    CFLAGS += ' -mcpu=cortex-M7 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32h747-st-discovery/rtconfig.py

@@ -94,6 +94,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp.sp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-M7 '
+    CFLAGS += ' -mcpu=cortex-M7 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32h750-armfly-h7-tool/rtconfig.py

@@ -94,6 +94,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M7.fp.sp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-M7 '
+    CFLAGS += ' -mcpu=cortex-M7 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l010-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M0 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m0 '
+    CFLAGS += ' -mcpu=cortex-m0 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l053-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M0 '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m0 '
+    CFLAGS += ' -mcpu=cortex-m0 '
+    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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l412-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l431-BearPi/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l432-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l433-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l452-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l475-atk-pandora/board/ports/fal/SConscript

@@ -13,7 +13,10 @@ LOCAL_CCFLAGS = ''
 if rtconfig.CROSS_TOOL == 'gcc':
     LOCAL_CCFLAGS += ' -std=c99'
 elif rtconfig.CROSS_TOOL == 'keil':
-    LOCAL_CCFLAGS += ' --c99'
+    if rtconfig.PLATFORM == 'armcc':
+        LOCAL_CCFLAGS += ' --c99'
+    elif rtconfig.PLATFORM == 'armclang':
+        LOCAL_CCFLAGS += ' -std=c99'
 
 group = DefineGroup('FAL', src, depend = ['PKG_USING_FAL'], CPPPATH = CPPPATH, LOCAL_CCFLAGS = LOCAL_CCFLAGS)
 

bsp/stm32/stm32l475-st-discovery/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l476-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l496-ali-developer/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l496-st-nucleo/rtconfig.py

@@ -94,6 +94,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l4r5-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l4r9-st-eval/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32l4r9-st-sensortile-box/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32mp157a-st-discovery/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32mp157a-st-ev1/rtconfig.py

@@ -23,7 +23,7 @@ elif CROSS_TOOL == 'keil':
     EXEC_PATH   = r'C:/Keil_v5'
 elif CROSS_TOOL == 'iar':
     PLATFORM    = 'iar'
-    EXEC_PATH   = r'D:\software\Embedded Workbench 8.3'
+    EXEC_PATH   = r'C:/Program Files (x86)/IAR Systems/Embedded Workbench 8.0'
 
 if os.getenv('RTT_EXEC_PATH'):
     EXEC_PATH = os.getenv('RTT_EXEC_PATH')
@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32wb55-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

bsp/stm32/stm32wl55-st-nucleo/rtconfig.py

@@ -93,6 +93,40 @@ elif PLATFORM == 'armcc':
 
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
+elif PLATFORM == 'armclang':
+    # toolchains
+    CC = 'armclang'
+    CXX = 'armclang'
+    AS = 'armasm'
+    AR = 'armar'
+    LINK = 'armlink'
+    TARGET_EXT = 'axf'
+
+    DEVICE = ' --cpu Cortex-M4.fp '
+    CFLAGS = ' --target=arm-arm-none-eabi -mcpu=cortex-m4 '
+    CFLAGS += ' -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 '
+    CFLAGS += ' -mfloat-abi=hard -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.map '
+    LFLAGS += r' --strict --scatter "board\linker_scripts\link.sct" '
+    CFLAGS += ' -I' + EXEC_PATH + '/ARM/ARMCLANG/include'
+    LFLAGS += ' --libpath=' + EXEC_PATH + '/ARM/ARMCLANG/lib'
+
+    EXEC_PATH += '/ARM/ARMCLANG/bin/'
+
+    if BUILD == 'debug':
+        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'
+
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'

libcpu/arm/AT91SAM7S/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/AT91SAM7X/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/am335x/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/arm926/SConscript

@@ -9,7 +9,7 @@ src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 ASFLAGS = ''
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
     ASFLAGS = ' --cpreproc'
 

libcpu/arm/armv6/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/common/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/cortex-a/SConscript

@@ -23,7 +23,7 @@ if GetDepend('RT_USING_GIC_V3'):
     src += ['gicv3.c']
     src += ['trap.c']
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/cortex-m0/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/cortex-m23/SConscript

@@ -8,9 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
-    src += Glob('*_rvds.S')
-elif rtconfig.PLATFORM == 'armclang':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/cortex-m3/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/cortex-m33/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/cortex-m4/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'armclang':

libcpu/arm/cortex-r4/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/dm36x/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/lpc214x/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/lpc24xx/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/realview-a8-vmm/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/s3c24x0/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':

libcpu/arm/s3c44b0/SConscript

@@ -8,7 +8,7 @@ cwd     = GetCurrentDir()
 src     = Glob('*.c') + Glob('*.cpp')
 CPPPATH = [cwd]
 
-if rtconfig.PLATFORM == 'armcc':
+if rtconfig.PLATFORM == 'armcc' or rtconfig.PLATFORM == 'armclang':
     src += Glob('*_rvds.S')
 
 if rtconfig.PLATFORM == 'gcc':