diff --git a/BUILD.gn b/BUILD.gn
index 36b14381..ea2e9ebe 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -84,7 +84,7 @@ exec_script("//build/lite/run_shell_cmd.py",
               " --file-list kconfig_files.txt" +
               " --env-list kconfig_env.txt" +
               " --config-out config.gni",
-            ])
+            ], "", [ liteos_config_file ])
 
 import("liteos.gni")
 
@@ -126,6 +126,19 @@ config("arch_config") {
   cflags = liteos_arch_cflags
   asmflags = cflags
   ldflags = cflags
+  if (defined(LOSCFG_ARCH_ARM_AARCH32)) {
+    if (!defined(LOSCFG_COMPILER_CLANG_LLVM)) {
+      cflags += ["-mthumb-interwork"]
+    }
+  }
+  if (defined(LOSCFG_THUMB)) {
+    cflags += [ "-mthumb" ]
+    if (defined(LOSCFG_COMPILER_CLANG_LLVM)) {
+      cflags += [ "-mimplicit-it=thumb" ]
+    } else {
+      cflags += [ "-Wa,-mimplicit-it=thumb" ]
+    }
+  }
 }
 
 config("as_objs_libc_flags") {
@@ -141,15 +154,182 @@ config("as_objs_libc_flags") {
   }
 }
 
-config("std_include") {
+config("stdinc_config") {
   std_include = exec_script("//build/lite/run_shell_cmd.py", [ "$cc -print-file-name=include" ], "trim string")
   cflags = [
     "-isystem",
     std_include,
   ]
+  cflags += [ "-nostdinc" ]
   asmflags = cflags
 }
 
+config("ssp_config") {
+  cflags = []
+  if (defined(LOSCFG_CC_STACKPROTECTOR_ALL)) {
+    cflags += [ "-fstack-protector-all" ]
+  } else if (defined(LOSCFG_CC_STACKPROTECTOR_STRONG)) {
+    cflags += [ "-fstack-protector-strong" ]
+  } else if (defined(LOSCFG_CC_STACKPROTECTOR)) {
+    cflags += [
+      "-fstack-protector",
+      "--param",
+      "ssp-buffer-size=4",
+    ]
+  } else {
+    cflags += [ "-fno-stack-protector" ]
+  }
+  asmflags = cflags
+}
+
+config("optimize_config") {
+  cflags = []
+  if (defined(LOSCFG_COMPILE_DEBUG)) {
+    cflags += [
+      "-g",
+      "-gdwarf-2",
+    ]
+    optimization_cflag = "-O0"
+  }
+  if (defined(LOSCFG_COMPILE_OPTIMIZE)) {
+    optimization_cflag = "-O2"
+  }
+  if (defined(LOSCFG_COMPILE_OPTIMIZE_SIZE)) {
+    if (defined(LOSCFG_COMPILER_CLANG_LLVM)) {
+      optimization_cflag = "-Oz"
+    } else {
+      optimization_cflag = "-Os"
+    }
+    cflags += [ "-flto" ]
+  }
+  cflags += [ optimization_cflag ]
+  asmflags = cflags
+}
+
+config("kconfig_config") {
+  cflags = [
+    "-imacros",
+    "$LITEOS_MENUCONFIG_H",
+  ]
+  asmflags = cflags
+}
+
+config("warn_config") {
+  cflags = [
+    "-Wall",
+    "-Werror",
+    "-Wpointer-arith",
+    "-Wstrict-prototypes",
+    "-Winvalid-pch",
+    "-Wno-address-of-packed-member",
+  ]
+
+  if (defined(LOSCFG_QUICK_START)) {
+    cflags -= [ "-Werror" ]
+  }
+
+  asmflags = cflags
+}
+
+config("dialect_config") {
+  cflags_c = [ "-std=c99" ]
+  cflags_cc = [ "-std=c++11" ]
+}
+
+config("misc_config") {
+  defines = [ "__LITEOS__" ]
+  if (!defined(LOSCFG_DEBUG_VERSION)) {
+    defines += [ "NDEBUG" ]
+  }
+
+  cflags = [
+    "-fno-pic",
+    "-fno-builtin",
+    "-fms-extensions",
+    "-fno-strict-aliasing",
+    "-fno-common",
+    "-fsigned-char",
+    "-ffunction-sections",
+    "-fdata-sections",
+    "-fno-exceptions",
+    "-fno-omit-frame-pointer",
+    "-fno-short-enums",
+    "-mno-unaligned-access",
+  ]
+
+  if (!defined(LOSCFG_COMPILER_CLANG_LLVM)) {
+    cflags += [ "-fno-aggressive-loop-optimizations" ]
+  }
+
+  asmflags = cflags
+}
+
+config("los_config") {
+  configs = [
+    ":arch_config",
+    ":kconfig_config",
+    ":stdinc_config",
+    ":dialect_config",
+    ":optimize_config",
+    ":ssp_config",
+    ":warn_config",
+    ":misc_config",
+  ]
+}
+
+executable("liteos") {
+  configs = [] # clear default configs
+  configs += [ ":los_config" ]
+  configs += [ ":public" ]
+
+  ldflags = [
+    "-static",
+    "-nostdlib",
+    "-Wl,--gc-sections",
+    "-Wl,-Map=$liteos_name.map",
+    "-Wl,--no-eh-frame-hdr",
+  ]
+
+  libgcc = exec_script("//build/lite/run_shell_cmd.py", [ "$cc -print-libgcc-file-name" ], "trim string")
+  libs = [ libgcc ]
+  if (defined(LOSCFG_COMPILER_CLANG_LLVM)) {
+    ldflags += [ "-Wl,-T" + rebase_path("tools/build/liteos_llvm.ld", root_build_dir) ]
+    inputs = [ "tools/build/liteos_llvm.ld" ]
+  } else {
+    ldflags += [ "-Wl,-T" + rebase_path("tools/build/liteos.ld", root_build_dir) ]
+    ldflags += [ "-Wl,-nostartfiles" ]
+    inputs = [ "tools/build/liteos.ld" ]
+  }
+
+  inputs += [ "$root_out_dir/board.ld" ]
+
+  output_dir = target_out_dir
+  output_name = liteos_name
+
+  deps = [
+    "platform:board.ld",
+    ":modules",
+  ]
+}
+
+copy("copy_liteos") {
+  deps = [ ":liteos" ]
+  sources = [ "$target_out_dir/unstripped/bin/$liteos_name" ]
+  outputs = [ "$root_out_dir/{{source_file_part}}" ]
+}
+
+build_ext_component("build_kernel_image") {
+  deps = [ ":copy_liteos" ]
+  exec_path = rebase_path(root_out_dir)
+
+  objcopy = "${compile_prefix}objcopy$toolchain_cmd_suffix"
+  objdump = "${compile_prefix}objdump$toolchain_cmd_suffix"
+
+  command = "$objcopy -O binary $liteos_name $liteos_name.bin"
+  command += " && sh -c '$objdump -t $liteos_name | sort >$liteos_name.sym.sorted'"
+  command += " && sh -c '$objdump -d $liteos_name >$liteos_name.asm'"
+}
+
 config("public") {
   configs = [
     "arch:public",
@@ -175,161 +355,6 @@ config("public") {
   }
 }
 
-config("los_nostdinc") {
-  cflags = [ "-nostdinc" ]
-}
-
-config("los_nostdlib") {
-  ldflags = [ "-nostdlib" ]
-}
-
-config("los_common") {
-  cflags = [
-    "-imacros",
-    "$LITEOS_MENUCONFIG_H",
-  ]
-
-  defines = [ "__LITEOS__" ]
-  if (!defined(LOSCFG_DEBUG_VERSION)) {
-    defines += [ "NDEBUG" ]
-  }
-
-  cflags_c = [ "-std=c99" ]
-
-  cflags += [
-    "-fno-pic",
-    "-fno-builtin",
-    "-Wall",
-    "-Werror",
-    "-fms-extensions",
-    "-Wno-address-of-packed-member",
-    "-fno-strict-aliasing",
-    "-fno-common",
-    "-fsigned-char",
-    "-Wpointer-arith",
-    "-Wstrict-prototypes",
-    "-Winvalid-pch",
-    "-ffunction-sections",
-    "-fdata-sections",
-    "-fno-exceptions",
-    "-fno-omit-frame-pointer",
-    "-fno-short-enums",
-  ]
-
-  if (defined(LOSCFG_QUICK_START)) {
-    cflags -= [ "-Werror" ]
-  }
-
-  if (defined(LOSCFG_COMPILE_DEBUG)) {
-    cflags += [
-      "-O0",
-      "-g",
-      "-gdwarf-2",
-    ]
-  } else {
-    if (defined(LOSCFG_COMPILER_CLANG_LLVM)) {
-      cflags += [
-        "-Oz",
-        "-flto",
-      ]
-    } else {
-      cflags += [ "-O2" ]
-    }
-  }
-
-  if (defined(LOSCFG_CC_STACKPROTECTOR_ALL)) {
-    cflags += [ "-fstack-protector-all" ]
-  } else if (defined(LOSCFG_CC_STACKPROTECTOR_STRONG)) {
-    cflags += [ "-fstack-protector-strong" ]
-  } else if (defined(LOSCFG_CC_STACKPROTECTOR)) {
-    cflags += [
-      "-fstack-protector",
-      "--param",
-      "ssp-buffer-size=4",
-    ]
-  } else {
-    cflags += [ "-fno-stack-protector" ]
-  }
-
-  if (!defined(LOSCFG_COMPILER_CLANG_LLVM)) {
-    cflags += [ "-fno-aggressive-loop-optimizations" ]
-    if (!defined(LOSCFG_ARCH_ARM_AARCH64)) {
-      cflags += [
-        "-mno-unaligned-access",
-        "-mthumb-interwork",
-      ]
-    }
-  }
-
-  if (defined(LOSCFG_THUMB)) {
-    cflags += [ "-mthumb" ]
-    if (defined(LOSCFG_COMPILER_CLANG_LLVM)) {
-      cflags += [ "-mimplicit-it=thumb" ]
-    } else {
-      cflags += [ "-Wa,-mimplicit-it=thumb" ]
-    }
-  }
-
-  asmflags = cflags
-}
-
-config("los_config") {
-  configs = [
-    ":los_common",
-    ":arch_config",
-    ":los_nostdinc",
-    ":los_nostdlib",
-    ":std_include",
-  ]
-}
-
-executable("liteos") {
-  configs = [] # clear default configs
-  configs += [ ":los_config" ]
-  configs += [ ":public" ]
-
-  ldflags = [
-    "-static",
-    "-Wl,--gc-sections",
-    "-Wl,-Map=$liteos_name.map",
-    "-Wl,--no-eh-frame-hdr",
-  ]
-
-  libgcc = exec_script("//build/lite/run_shell_cmd.py", [ "$cc -print-libgcc-file-name" ], "trim string")
-  libs = [ libgcc ]
-  if (defined(LOSCFG_COMPILER_CLANG_LLVM)) {
-    ldflags += [ "-Wl,-T" + rebase_path("tools/build/liteos_llvm.ld", root_build_dir) ]
-  } else {
-    ldflags += [ "-Wl,-T" + rebase_path("tools/build/liteos.ld", root_build_dir) ]
-    ldflags += [ "-Wl,-nostartfiles" ]
-  }
-
-  output_dir = target_out_dir
-  output_name = liteos_name
-
-  deps = [
-    ":modules",
-  ]
-}
-
-copy("copy_liteos") {
-  deps = [ ":liteos" ]
-  sources = [ "$target_out_dir/unstripped/bin/$liteos_name" ]
-  outputs = [ "$root_out_dir/{{source_file_part}}" ]
-}
-
-build_ext_component("build_kernel_image") {
-  deps = [ ":copy_liteos" ]
-  exec_path = rebase_path(root_out_dir)
-
-  objcopy = "${compile_prefix}objcopy$toolchain_cmd_suffix"
-  objdump = "${compile_prefix}objdump$toolchain_cmd_suffix"
-
-  command = "$objcopy -O binary $liteos_name $liteos_name.bin"
-  command += " && sh -c '$objdump -t $liteos_name | sort >$liteos_name.sym.sorted'"
-  command += " && sh -c '$objdump -d $liteos_name >$liteos_name.asm'"
-}
-
 group("modules") {
   deps = [
     "arch",
@@ -347,7 +372,7 @@ group("modules") {
   ]
 
   deps += [
-    "$HDFTOPDIR",
+    HDFTOPDIR,
     "//drivers/liteos",
   ]
 
diff --git a/Kconfig b/Kconfig
index ca2bd580..75703e0b 100644
--- a/Kconfig
+++ b/Kconfig
@@ -26,27 +26,56 @@
 # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-#
-# For a description of the syntax of this configuration file,
-# see extra/config/Kconfig-language.txt
-#
+
 mainmenu "Huawei LiteOS Configuration"
 
 menu "Compiler"
 choice
-    prompt "LiteOS_Compiler_Type"
+    prompt "Compiler type"
     default COMPILER_CLANG_LLVM
     help
-      Enable arm-himix100 or aarch64-himix100 or compiler.
+      Choose compiler type.
 
-config COMPILER_HIMIX_32
-    bool "arm-linux-ohoseabi"
+config COMPILER_GCC
+    bool "GCC"
+
+config CROSS_COMPILE
+    string "GCC cross-compile toolchain prefix"
+    depends on COMPILER_GCC
+    default "arm-linux-ohoseabi-" if ARCH_ARM_AARCH32
 
 config COMPILER_CLANG_LLVM
-    bool "clang-llvm"
+    bool "Clang"
+
+config LLVM_TARGET
+    string "Clang LLVM target"
+    depends on COMPILER_CLANG_LLVM
+    default "arm-liteos" if ARCH_ARM_AARCH32
 
 endchoice
+
+config COMPILE_DEBUG
+    bool "Enable debug options"
+    default n
+    help
+      Answer Y to add -g option in compile command.
+
+config COMPILE_OPTIMIZE
+    bool "Enable code optimization options"
+    default y
+    help
+      Answer Y to add optimization options for efficient code.
+      The final binary size will be smaller and execute faster.
+      But the debugging experience may be worst somehow.
+
+config COMPILE_OPTIMIZE_SIZE
+    bool "Enable code size optimization options" if COMPILE_OPTIMIZE
+    default y
+    help
+      Answer Y to add optimization options for small code size.
+      The final binary size will be smaller.
+      But the compile time may be much longer.
+
 endmenu
 
 menu "Platform"
@@ -123,11 +152,11 @@ source "net/Kconfig"
 
 ######################## config options of debug ########################
 menu "Debug"
-config COMPILE_DEBUG
-    bool "Enable GCC -g Option"
+config GDB
+    bool "Enable gdb functions"
     default n
     help
-      Answer Y to add -g option in gcc command. But the LiteOS size will be much larger.
+      Answer Y to enable gdb functions.
 
 config PLATFORM_ADAPT
     bool "Enable Os_adapt"
@@ -164,16 +193,10 @@ config ENABLE_MAGICKEY
 config THUMB
     bool "Enable Thumb"
     default n
-    select INTERWORK_THUMB
+    depends on ARCH_ARM
     help
       Answer Y to build thumb version.  This will make LiteOS smaller.
 
-config INTERWORK_THUMB
-    bool "Enable interwork Thumb" if THUMB
-    default n
-    help
-      Answer Y to enable interwork thumb.
-
 config PLATFORM_DVFS
     bool "Enable Dvfs"
     default n
diff --git a/Makefile b/Makefile
index cb86d5e8..9f6fda2b 100644
--- a/Makefile
+++ b/Makefile
@@ -60,7 +60,7 @@ CONFIG ?= $(PRODUCT_PATH)/kernel_configs/debug$(tee).config
 endif
 
 KCONFIG_CONFIG ?= $(CONFIG)
-SYSROOT_PATH ?= $(LITEOSTOPDIR)/../../prebuilts/lite/sysroot
+SYSROOT_PATH ?= $(OUT)/sysroot
 LITEOS_MENUCONFIG_H ?= $(LITEOSTOPDIR)/config.h
 LITEOS_CONFIG_FILE ?= $(LITEOSTOPDIR)/.config
 
@@ -95,7 +95,6 @@ ROOTFS_DIR = $(OUT)/rootfs
 ROOTFS_ZIP = $(OUT)/rootfs.zip
 
 define HELP =
--------------------------------------------------------
 Usage: make [TARGET]... [PARAMETER=VALUE]...
 
 Targets:
@@ -116,7 +115,6 @@ Parameters:
     RELEASE:    boolean value(1 or y for true), build release version
     CONFIG:     kernel config file to be use
     args:       arguments for xxconfig command
--------------------------------------------------------
 endef
 export HELP
 
@@ -126,11 +124,21 @@ help:
 	$(HIDE)echo "$$HELP"
 
 sysroot:
-ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-ifeq ($(wildcard $(SYSROOT_PATH)/usr/include/$(LLVM_TARGET)/),)
-	$(HIDE)$(MAKE) -C $(SYSROOT_PATH)/build TARGETS=liteos_a_user
-endif
 	$(HIDE)echo "sysroot:" $(abspath $(SYSROOT_PATH))
+ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
+ifeq ($(origin SYSROOT_PATH),file)
+	$(HIDE)mkdir -p $(SYSROOT_PATH)/build && cd $(SYSROOT_PATH)/build && \
+	ln -snf $(LITEOSTOPDIR)/../../prebuilts/lite/sysroot/build/Makefile && \
+	$(MAKE) TARGETS=liteos_a_user \
+		ARCH=$(ARCH) \
+		TARGET=$(LOSCFG_LLVM_TARGET) \
+		ARCH_CFLAGS="$(LITEOS_CORE_COPTS) -w" \
+		TOPDIR="$(LITEOSTOPDIR)/../.." \
+		SYSROOTDIR="$(SYSROOT_PATH)" \
+		CLANG="$(LITEOS_COMPILER_PATH)clang" \
+		BUILD_ALL_MULTILIB=false \
+		BUILD_DEBUG=$(if $(patsubst y,,$(or $(RELEASE:1=y),n)),true,false)
+endif
 endif
 
 $(KCONFIG_CMDS):
@@ -142,7 +150,7 @@ $(LITEOS_CONFIG_FILE): $(KCONFIG_CONFIG)
 update_config:
 	$(HIDE)test -f "$(CONFIG)" && cp -v "$(CONFIG)" .config && menuconfig && savedefconfig --out "$(CONFIG)"
 
-$(LITEOS_LIBS_TARGET):
+$(LITEOS_LIBS_TARGET): sysroot
 	$(HIDE)for dir in $(LIB_SUBDIRS); do $(MAKE) -C $$dir all || exit 1; done
 
 $(LITEOS_TARGET): $(OUT)/$(LITEOS_TARGET)
@@ -167,14 +175,14 @@ $(OUT)/$(LITEOS_TARGET).asm: $(OUT)/$(LITEOS_TARGET)
 $(OUT)/$(LITEOS_TARGET).size: $(OUT)/$(LITEOS_TARGET)
 	$(NM) -S --size-sort $< >$@
 
-$(APPS):
+$(APPS): sysroot
 	$(HIDE)$(MAKE) -C apps all
 
 $(ROOTFS): $(APPS)
 	$(HIDE)mkdir -p $(OUT)/musl
 ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-	$(HIDE)cp -fp $$($(CC) --target=$(LLVM_TARGET) --sysroot=$(SYSROOT_PATH) $(LITEOS_CFLAGS) -print-file-name=libc.so) $(OUT)/musl
-	$(HIDE)cp -fp $$($(GPP) --target=$(LLVM_TARGET) --sysroot=$(SYSROOT_PATH) $(LITEOS_CXXFLAGS) -print-file-name=libc++.so) $(OUT)/musl
+	$(HIDE)cp -fp $$($(CC) $(LITEOS_CFLAGS) -print-file-name=libc.so) $(OUT)/musl
+	$(HIDE)cp -fp $$($(GPP) $(LITEOS_CXXFLAGS) -print-file-name=libc++.so) $(OUT)/musl
 else
 	$(HIDE)cp -fp $$($(CC) $(LITEOS_CFLAGS) -print-file-name=libc.so) $(OUT)/musl
 	$(HIDE)cp -fp $$($(CC) $(LITEOS_CFLAGS) -print-file-name=libgcc_s.so.1) $(OUT)/musl
@@ -189,6 +197,7 @@ endif
 	$(HIDE)cd $(ROOTFS_DIR)/.. && zip -r $(ROOTFS_ZIP) $(ROOTFS)
 
 clean:
+	$(HIDE)if [ -d $(SYSROOT_PATH)/build ]; then $(MAKE) -C $(SYSROOT_PATH)/build clean; fi
 	$(HIDE)for dir in $(LIB_SUBDIRS) apps; do $(MAKE) -C $$dir clean || exit 1; done
 	$(HIDE)$(RM) $(LITEOS_MENUCONFIG_H)
 	$(HIDE)echo "clean $(LOSCFG_PLATFORM) finish"
diff --git a/apps/Makefile b/apps/Makefile
index fd589674..7259e2f6 100644
--- a/apps/Makefile
+++ b/apps/Makefile
@@ -34,20 +34,14 @@ export APPSTOPDIR
 
 include $(APPSTOPDIR)/config.mk
 
-HIDE := @
-APPS := app
-
-all: $(APPS)
-
-# Make
-$(APPS):
+all:
 ifneq ($(APP_SUBDIRS), )
-	$(HIDE) for dir in $(APP_SUBDIRS); do $(MAKE) -C $$dir || exit 1; done
+	$(HIDE) for dir in $(APP_SUBDIRS); do $(MAKE) -C $$dir all || exit 1; done
 endif
 
 clean:
 ifneq ($(APP_SUBDIRS), )
-	$(HIDE) for dir in $(APP_SUBDIRS); do $(MAKE) -C $$dir clean; done
+	$(HIDE) for dir in $(APP_SUBDIRS); do $(MAKE) -C $$dir clean || exit 1; done
 endif
 
-.PHONY: all $(APPS) clean
+.PHONY: all clean
diff --git a/apps/app.mk b/apps/app.mk
index d79f6684..2fa2111e 100644
--- a/apps/app.mk
+++ b/apps/app.mk
@@ -52,6 +52,17 @@ LOCAL_CPPGCH := $(patsubst %.h,%.h.gch,$(LOCAL_CPPHS))
 
 all : $(APP)
 
+define ECHO =
+ifeq ($$(HIDE),@)
+_$(1) := $($(1))
+$(1) = echo "  $(1)" $$(patsubst $$(OUT)/%,%,$$@) && $$(_$(1))
+endif
+endef
+$(foreach cmd,CC GPP AS,$(eval $(call ECHO,$(cmd))))
+
+LOCAL_FLAGS += -MD -MP
+-include $(LOCAL_OBJS:%.o=%.d)
+
 $(LOCAL_COBJS): $(OBJOUT)/%.o: %.c
 	$(HIDE)$(OBJ_MKDIR)
 	$(HIDE)$(CC) $(CFLAGS) $(LOCAL_FLAGS) $(LOCAL_CFLAGS) -c $< -o $@
@@ -83,7 +94,7 @@ LOCAL_GCH := $(LOCAL_CGCH) $(LOCAL_CPPGCH)
 $(LOCAL_OBJS): $(LOCAL_GCH)
 $(APP): $(LOCAL_OBJS)
 	$(HIDE)$(OBJ_MKDIR)
-	$(HIDE)$(GPP) $(LDFLAGS) $^ -o $@
+	$(HIDE)$(GPP) $(LDFLAGS) -o $@ $^
 
 clean:
 	$(HIDE)$(RM) $(APP) $(OBJOUT) $(LOCAL_GCH) *.bak *~
diff --git a/apps/config.mk b/apps/config.mk
index 7b6a7bba..098e352c 100644
--- a/apps/config.mk
+++ b/apps/config.mk
@@ -29,25 +29,16 @@
 
 include $(LITEOSTOPDIR)/config.mk
 
-ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-LLVM_SYSROOT := --sysroot=$(SYSROOT_PATH)
-endif
-
 # common flags config
-BASE_OPTS := -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE
-BASE_OPTS += -ffunction-sections -fdata-sections -fno-omit-frame-pointer -fno-common -fno-strict-aliasing
-BASE_OPTS += -fstack-protector-strong -Wall -Werror -flto
-BASE_OPTS += $(LITEOS_CORE_COPTS) $(LLVM_EXTRA_OPTS) $(LLVM_SYSROOT) $(LITEOS_GCOV_OPTS)
+BASE_OPTS := -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE $(LITEOS_GCOV_OPTS)
 
-ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-OPTMIZE_OPTS = -Oz
-else
-OPTMIZE_OPTS = -O2
-endif
+ASFLAGS   :=
+CFLAGS    := $(LITEOS_COPTS) $(BASE_OPTS) -fPIE
+CXXFLAGS  := $(LITEOS_CXXOPTS) $(BASE_OPTS) -fPIE
+LDFLAGS   := $(LITEOS_CORE_COPTS) -pie -Wl,-z,relro,-z,now -O2
 
-CFLAGS := -std=c99 -fPIE -fno-exceptions $(BASE_OPTS) $(OPTMIZE_OPTS)
-CXXFLAGS := -std=c++11 -fPIE -fexceptions -fpermissive -frtti $(BASE_OPTS) $(OPTMIZE_OPTS)
-LDFLAGS  := -pie -Wl,-z,relro,-z,now -O2 $(BASE_OPTS) $(LLVM_EXTRA_LD_OPTS)
+CFLAGS    := $(filter-out -fno-pic -fno-builtin -nostdinc -nostdlib,$(CFLAGS))
+CXXFLAGS  := $(filter-out -fno-pic -fno-builtin -nostdinc -nostdlib -nostdinc++,$(CXXFLAGS))
 
 # alias variable config
 HIDE := @
@@ -57,9 +48,9 @@ CP := cp -rf
 MV := mv -f
 
 APP := $(APPSTOPDIR)/app.mk
-APP_SUBDIRS :=
 
 ##build modules config##
+APP_SUBDIRS :=
 
 ifeq ($(LOSCFG_SHELL), y)
 APP_SUBDIRS += shell
@@ -74,3 +65,12 @@ endif
 ifeq ($(LOSCFG_NET_LWIP_SACK_TFTP), y)
 APP_SUBDIRS += tftp
 endif
+
+# clear all local variables
+LOCAL_FLAGS    :=
+LOCAL_CFLAGS   :=
+LOCAL_CPPFLAGS :=
+LOCAL_ASFLAGS  :=
+LOCAL_SRCS     :=
+LOCAL_CHS      :=
+LOCAL_CPPHS    :=
diff --git a/apps/shell/Makefile b/apps/shell/Makefile
index e281c760..f4c4edd1 100644
--- a/apps/shell/Makefile
+++ b/apps/shell/Makefile
@@ -31,18 +31,14 @@ include $(APPSTOPDIR)/config.mk
 
 APP_NAME := $(notdir $(shell pwd))
 
-SECUREC_INCLUDE := $(LITEOSTHIRDPARTY)/bounds_checking_function/include
+SECUREC_DIR := $(LITEOSTHIRDPARTY)/bounds_checking_function
 
-LOCAL_SRCS = $(wildcard src/main.c)\
-             $(wildcard src/shcmd.c)\
-             $(wildcard src/shmsg.c)\
-             $(wildcard src/shcmdparse.c)\
-             $(wildcard builtin/cd.c)
-LOCAL_SRCS += $(wildcard $(LITEOSTHIRDPARTY)/bounds_checking_function/src/*.c)
+LOCAL_SRCS = $(wildcard src/*.c builtin/*.c)
+LOCAL_SRCS += $(wildcard $(SECUREC_DIR)/src/*.c)
 
 LOCAL_INCLUDE := \
-	-I include/ \
-	-I $(SECUREC_INCLUDE)\
+	-I include \
+	-I $(SECUREC_DIR)/include
 
 LOCAL_FLAGS += $(LOCAL_INCLUDE)
 
diff --git a/apps/shell/include/show.h b/apps/shell/include/show.h
index 2bb94865..252f6ee3 100644
--- a/apps/shell/include/show.h
+++ b/apps/shell/include/show.h
@@ -42,10 +42,10 @@ extern "C" {
 #endif /* __cplusplus */
 #endif /* __cplusplus */
 
-extern char *OsShellGetWorkingDirtectory();
-extern unsigned int OsShellInit();
+extern char *OsShellGetWorkingDirtectory(void);
+extern unsigned int OsShellInit(void);
 extern int OsShellDeinit(ShellCB *shellCB);
-extern ShellCB *OsGetShellCb();
+extern ShellCB *OsGetShellCb(void);
 
 #ifdef __cplusplus
 #if __cplusplus
diff --git a/apps/tftp/Makefile b/apps/tftp/Makefile
index 4690d069..c148618b 100644
--- a/apps/tftp/Makefile
+++ b/apps/tftp/Makefile
@@ -34,14 +34,11 @@ APP_NAME := $(notdir $(shell pwd))
 SECUREC_DIR := $(LITEOSTHIRDPARTY)/bounds_checking_function
 
 LOCAL_SRCS = $(wildcard src/*.c)
-LOCAL_SRCS += $(wildcard $(SECUREC_DIR)/src/strncpy_s.c)
-LOCAL_SRCS += $(wildcard $(SECUREC_DIR)/src/memcpy_s.c)
-LOCAL_SRCS += $(wildcard $(SECUREC_DIR)/src/memset_s.c)
-LOCAL_SRCS += $(wildcard $(SECUREC_DIR)/src/strncat_s.c)
+LOCAL_SRCS += $(wildcard $(SECUREC_DIR)/src/*.c)
 
 LOCAL_INCLUDE := \
-	-I include/ \
-	-I $(SECUREC_DIR)/include/\
+	-I include \
+	-I $(SECUREC_DIR)/include
 
 LOCAL_FLAGS += $(LOCAL_INCLUDE)
 
diff --git a/arch/arm/BUILD.gn b/arch/arm/BUILD.gn
index 6a797c10..257b1830 100644
--- a/arch/arm/BUILD.gn
+++ b/arch/arm/BUILD.gn
@@ -31,17 +31,10 @@ import("//kernel/liteos_a/liteos.gni")
 
 group("arm") {
   deps = [ "gic" ]
-  if (defined(LOSCFG_ARCH_ARM_AARCH32)) {
-    deps += [ "arm" ]
-  }
+  deps += [ ARCH ]
 }
 
 config("public") {
   include_dirs = [ "include" ]
-  configs = []
-  if (defined(LOSCFG_ARCH_ARM_AARCH32)) {
-    configs += [ "arm:public" ]
-  } else if (defined(LOSCFG_ARCH_ARM_AARCH64)) {
-    configs += [ "aarch64:public" ]
-  }
+  configs = [ "$ARCH:public" ]
 }
diff --git a/arch/arm/arm.mk b/arch/arm/arm.mk
index 99850cdb..9ca7cfea 100644
--- a/arch/arm/arm.mk
+++ b/arch/arm/arm.mk
@@ -36,15 +36,15 @@ LOSCFG_ARCH_FPU_STRIP   := $(subst $\",,$(LOSCFG_ARCH_FPU))
 LOSCFG_ARCH_FPU          = $(LOSCFG_ARCH_FPU_STRIP)
 
 ifeq ($(LOSCFG_ARCH_ARM_AARCH32), y)
-LITEOS_ARCH_ARM         := arm
+ARCH                    := arm
 else ifeq ($(LOSCFG_ARCH_ARM_AARCH64), y)
-LITEOS_ARCH_ARM         := 
+ARCH                    := aarch64
 endif
 
 LITEOS_BASELIB          += -l$(LOSCFG_ARCH_CPU)
 LITEOS_BASELIB          += -lgic
 
-LIB_SUBDIRS             += arch/arm/$(LITEOS_ARCH_ARM)
+LIB_SUBDIRS             += arch/arm/$(ARCH)
 LIB_SUBDIRS             += arch/arm/gic
 
 # CPU compile options
@@ -70,8 +70,8 @@ LITEOS_ASOPTS           += $(LITEOS_CPU_OPTS)
 LITEOS_CXXOPTS_BASE     += $(LITEOS_CORE_COPTS)
 
 ARCH_INCLUDE            := -I $(LITEOSTOPDIR)/arch/arm/include \
-                           -I $(LITEOSTOPDIR)/arch/arm/$(LITEOS_ARCH_ARM)/include \
-                           -I $(LITEOSTOPDIR)/arch/arm/$(LITEOS_ARCH_ARM)/src/include
+                           -I $(LITEOSTOPDIR)/arch/arm/$(ARCH)/include \
+                           -I $(LITEOSTOPDIR)/arch/arm/$(ARCH)/src/include
 
 LITEOS_PLATFORM_INCLUDE += $(ARCH_INCLUDE)
 
@@ -84,10 +84,6 @@ else ifeq ($(LOSCFG_ARCH_FPU_VFP_D32), y)
     LITEOS_CMACRO       += -DLOSCFG_ARCH_FPU_VFP_D32
 endif
 
-# extra definition for other module
-LITEOS_CPU_TYPE          = $(LOSCFG_ARCH_CPU)
-LITEOS_ARM_ARCH         := -march=$(subst $\",,$(LOSCFG_ARCH_ARM_VER))
-
 # linux style macros
 LINUX_ARCH_$(LOSCFG_ARCH_ARM_V7A) = -D__LINUX_ARM_ARCH__=7
 LINUX_ARCH_$(LOSCFG_ARCH_ARM_V7R) = -D__LINUX_ARM_ARCH__=7
diff --git a/arch/arm/arm/Makefile b/arch/arm/arm/Makefile
index d105536e..96da3e74 100644
--- a/arch/arm/arm/Makefile
+++ b/arch/arm/arm/Makefile
@@ -38,7 +38,7 @@ LOCAL_INCLUDE := \
 	-I $(LITEOSTOPDIR)/kernel/extended/dynload/include \
 	-I $(LITEOSTOPDIR)/arch/arm/arm/include \
 
-ifeq ($(LITEOS_ARM_ARCH), -march=armv7-a)
+ifeq ($(LOSCFG_ARCH_ARM_VER), "armv7-a")
 LOCAL_SRCS += $(wildcard src/armv7a/*.S)
 endif
 
diff --git a/arch/arm/arm/src/los_hw.c b/arch/arm/arm/src/los_hw.c
index 2c9584b9..617c7c57 100644
--- a/arch/arm/arm/src/los_hw.c
+++ b/arch/arm/arm/src/los_hw.c
@@ -85,7 +85,7 @@ LITE_OS_SEC_TEXT_INIT VOID *OsTaskStackInit(UINT32 taskID, UINT32 stackSize, VOI
     taskContext->LR = (UINTPTR)OsTaskExit;  /* LR should be kept, to distinguish it's THUMB or ARM instruction */
     taskContext->R0 = taskID;               /* R0 */
 
-#ifdef LOSCFG_INTERWORK_THUMB
+#ifdef LOSCFG_THUMB
     taskContext->regCPSR = PSR_MODE_SVC_THUMB; /* CPSR (Enable IRQ and FIQ interrupts, THUMNB-mode) */
 #else
     taskContext->regCPSR = PSR_MODE_SVC_ARM;   /* CPSR (Enable IRQ and FIQ interrupts, ARM-mode) */
@@ -123,7 +123,7 @@ LITE_OS_SEC_TEXT_INIT VOID OsUserTaskStackInit(TaskContext *context, UINTPTR tas
 {
     LOS_ASSERT(context != NULL);
 
-#ifdef LOSCFG_INTERWORK_THUMB
+#ifdef LOSCFG_THUMB
     context->regCPSR = PSR_MODE_USR_THUMB;
 #else
     context->regCPSR = PSR_MODE_USR_ARM;
diff --git a/bsd/Makefile b/bsd/Makefile
index a5c0d1ff..e8544349 100644
--- a/bsd/Makefile
+++ b/bsd/Makefile
@@ -33,8 +33,8 @@ MODULE_NAME := $(notdir $(shell pwd))
 
 LOCAL_SRCS  := $(wildcard kern/*.c)
 
-LOCAL_SRCS  += $(wildcard $(LITEOS_ARCH_ARM)/*.c)
-LOCAL_SRCS  += $(wildcard $(LITEOS_ARCH_ARM)/*.S)
+LOCAL_SRCS  += $(wildcard $(ARCH)/*.c)
+LOCAL_SRCS  += $(wildcard $(ARCH)/*.S)
 
 ifeq ($(LOSCFG_DRIVERS_RANDOM), y)
 LOCAL_SRCS += $(wildcard crypto/rijndael/*.c) \
diff --git a/config.mk b/config.mk
index 2345d713..a72ba1e1 100644
--- a/config.mk
+++ b/config.mk
@@ -51,3 +51,11 @@ LITEOS_CXXFLAGS := $(LITEOS_CXXOPTS)     $(LITEOS_CXXMACRO) \
 LITEOS_LDFLAGS  := $(LITEOS_LD_OPTS)     $(LITEOS_LD_PATH) \
                    $(LITEOS_LD_SCRIPT)
 
+# clear all local variables
+LOCAL_FLAGS    :=
+LOCAL_CFLAGS   :=
+LOCAL_CPPFLAGS :=
+LOCAL_ASFLAGS  :=
+LOCAL_SRCS     :=
+LOCAL_CHS      :=
+LOCAL_CPPHS    :=
diff --git a/kernel/extended/vdso/usr/BUILD.gn b/kernel/extended/vdso/usr/BUILD.gn
index fd128012..55d703c4 100644
--- a/kernel/extended/vdso/usr/BUILD.gn
+++ b/kernel/extended/vdso/usr/BUILD.gn
@@ -39,23 +39,14 @@ shared_library("OHOS-vdso") {
     "$LITEOSTOPDIR/bsd/compat/linuxkpi/include",
   ]
 
-  cflags = [
-    "-fPIC",
-    "-fno-common",
-    "-fno-strict-aliasing",
-  ]
-
-  configs = []
-  configs += [ "$LITEOSTOPDIR:los_common" ]
-  configs += [ "$LITEOSTOPDIR:los_nostdlib" ]
-  configs += [ "$LITEOSTOPDIR:arch_config" ]
-
-  defines = [ "_XOPEN_SOURCE=700" ]
+  configs -= [ "//build/lite/config:security" ]
 
   ldflags = [
+    "-nostdlib",
     "-Wl,-Bsymbolic",
     "-Wl,-T" + rebase_path("los_vdso.ld", root_build_dir),
   ]
 
+  inputs = [ "los_vdso.ld" ]
   output_dir = target_out_dir
 }
diff --git a/kernel/extended/vdso/usr/Makefile b/kernel/extended/vdso/usr/Makefile
index 0a34e5a5..1a52dc33 100644
--- a/kernel/extended/vdso/usr/Makefile
+++ b/kernel/extended/vdso/usr/Makefile
@@ -37,12 +37,8 @@ VDSO_INCLUDE := -I $(LITEOSTOPDIR)/kernel/extended/vdso/include \
                 -I $(LITEOSTOPDIR)/platform \
                 -I $(LITEOSTOPDIR)/bsd/compat/linuxkpi/include
 
-VDSO_CCFLAGS := -nostdlib -fPIC -fno-common -fno-strict-aliasing \
-                $(LITEOS_SSP) $(LITEOS_CORE_COPTS) $(WARNING_AS_ERROR) $(LITEOS_COPTS_OPTMIZE)
-ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-VDSO_CCFLAGS += $(LLVM_EXTRA_OPTS) --sysroot=$(SYSROOT_PATH)
-VDSO_CCFLAGS += -O2
-endif
+VDSO_CCFLAGS := $(filter-out -nostdinc,$(LITEOS_COPTS))
+VDSO_CCFLAGS += -fPIC -O2 -D_XOPEN_SOURCE=700
 
 VDSO_LDFLAGS := -shared -Wl,-s,-Bsymbolic,-Tlos_vdso.ld
 
diff --git a/kernel/user/BUILD.gn b/kernel/user/BUILD.gn
index 6a8fa343..922f2db4 100644
--- a/kernel/user/BUILD.gn
+++ b/kernel/user/BUILD.gn
@@ -46,9 +46,8 @@ userinit = "lib$module_name.O"
 executable(userinit) {
   output_dir = target_out_dir
   deps = [ ":$module_name" ]
-  configs = []
-  configs += [ "$LITEOSTOPDIR:los_config" ]
   ldflags = [
+    "-nostdlib",
     "-static",
     "-Wl,-r",
   ]
diff --git a/kernel/user/Makefile b/kernel/user/Makefile
index 2037d90b..8a7c03a3 100644
--- a/kernel/user/Makefile
+++ b/kernel/user/Makefile
@@ -42,15 +42,14 @@ LOCAL_FLAGS :=  $(LOCAL_INCLUDE)
 
 include $(MODULE)
 
-LIBO := $(OUT)/lib/lib$(MODULE_NAME).O
+USERINIT := $(OUT)/lib/lib$(MODULE_NAME).O
 
-$(LIBO): $(LIBA)
-	$(HIDE) $(LD) -r -o $@ --whole-archive $< --no-whole-archive
-	$(HIDE) $(RM) $<
+$(USERINIT): $(MODULE)
+	$(HIDE)$(LD) -r -o $@ --whole-archive $< --no-whole-archive
 
-clean2:
-	$(HIDE) $(RM) $(LIBO)
+clean_userinit:
+	$(HIDE)$(RM) $(USERINIT)
 
-all: $(LIBO)
-clean: clean2
-.PHONY: clean2
+all: $(USERINIT)
+clean: clean_userinit
+.PHONY: clean_userinit
diff --git a/lib/libc/Makefile b/lib/libc/Makefile
index 14432444..7671a46a 100644
--- a/lib/libc/Makefile
+++ b/lib/libc/Makefile
@@ -2,7 +2,6 @@ include $(LITEOSTOPDIR)/config.mk
 
 MODULE_NAME := c
 
-ARCH = arm
 TOPDIR = $(LITEOSTOPDIR)/../..
 MUSLDIR = $(TOPDIR)/third_party/musl
 MUSLPORTINGDIR = $(MUSLDIR)/porting/liteos_a/kernel
diff --git a/liteos.gni b/liteos.gni
index 517c22c5..dcbf1410 100644
--- a/liteos.gni
+++ b/liteos.gni
@@ -33,6 +33,16 @@ LITEOSTOPDIR = "//kernel/liteos_a"
 LITEOSTHIRDPARTY = "//third_party"
 HDFTOPDIR = "//drivers/adapter/khdf/liteos"
 
+ARCH = ""
+if (defined(LOSCFG_ARCH_ARM_AARCH32)) {
+  ARCH = "arm"
+} else if (defined(LOSCFG_ARCH_ARM_AARCH64)) {
+  ARCH = "aarch64"
+}
+
+assert(ARCH != "", "ARCH not set!")
+assert(ARCH == arch, "ARCH not match! details: $ARCH != $arch")
+
 template("kernel_module") {
   current_dir_name = get_path_info(rebase_path("."), "file")
   if (target_name != current_dir_name) {
diff --git a/platform/BUILD.gn b/platform/BUILD.gn
index 31928452..444695c5 100644
--- a/platform/BUILD.gn
+++ b/platform/BUILD.gn
@@ -60,7 +60,6 @@ kernel_module(module_name) {
 
 group("platform") {
   public_deps = [ ":$module_name" ]
-  deps = [ ":board.ld" ]
 }
 
 config("public") {
diff --git a/tools/build/mk/los_config.mk b/tools/build/mk/los_config.mk
index 266d058d..02245388 100644
--- a/tools/build/mk/los_config.mk
+++ b/tools/build/mk/los_config.mk
@@ -50,8 +50,9 @@ endif
 ARFLAGS  := cr
 
 ## platform relative ##
-LITEOS_ARM_ARCH :=
-LITEOS_CPU_TYPE :=
+ifeq ($(ARCH),)
+ARCH = $(error ARCH not set!)
+endif
 ## c as cxx ld options ##
 LITEOS_ASOPTS :=
 LITEOS_COPTS_BASE :=
@@ -88,14 +89,20 @@ LOSCFG_BOARD_CONFIG_PATH := $(LOSCFG_BOARD_CONFIG_PATH:"%"=%)
 ifeq ($(wildcard $(LITEOSTOPDIR)/../../$(LOSCFG_BOARD_CONFIG_PATH) $(LOSCFG_BOARD_CONFIG_PATH)),)
 LOSCFG_BOARD_CONFIG_PATH := $(LOSCFG_BOARD_CONFIG_PATH:%/config/board=%/board)
 endif
-ifeq ($(LOSCFG_COMPILER_HIMIX_32), y)
-CROSS_COMPILE ?= arm-linux-ohoseabi-
+ifeq ($(LOSCFG_COMPILER_GCC), y)
+CROSS_COMPILE ?= $(LOSCFG_CROSS_COMPILE)
 LITEOS_COMPILER_PATH ?= $(LITEOSTOPDIR)/../../prebuilts/gcc/linux-x86/arm/arm-linux-ohoseabi-gcc/bin/
 else ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
 CROSS_COMPILE ?= llvm-
 LITEOS_COMPILER_PATH ?= $(LITEOSTOPDIR)/../../prebuilts/clang/ohos/linux-x86_64/llvm/bin/
+ifneq ($(LOSCFG_LLVM_TARGET),)
+LLVM_TARGET = -target $(LOSCFG_LLVM_TARGET)
 endif
-ifeq ($(wildcard $(LITEOS_COMPILER_PATH)),)
+ifneq ($(SYSROOT_PATH),)
+LLVM_SYSROOT = --sysroot=$(SYSROOT_PATH)
+endif
+endif
+ifeq ($(wildcard $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)as),)
 LITEOS_COMPILER_PATH := $(patsubst %/$(CROSS_COMPILE)as,%/,$(shell which $(CROSS_COMPILE)as))
 endif
 LITEOS_PLATFORM := $(LOSCFG_PLATFORM:"%"=%)
@@ -425,17 +432,21 @@ ifneq ($(LOSCFG_DEBUG_VERSION), y)
 endif
 
 ifeq ($(LOSCFG_COMPILE_DEBUG), y)
-    LITEOS_COPTS_OPTMIZE = -O0
+    LITEOS_COPTS_OPTIMIZE = -O0
     LITEOS_COPTS_OPTION  = -g -gdwarf-2
-else
+endif
+ifeq ($(LOSCFG_COMPILE_OPTIMIZE), y)
+    LITEOS_COPTS_OPTIMIZE = -O2
+endif
+ifeq ($(LOSCFG_COMPILE_OPTIMIZE_SIZE), y)
     ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-        LITEOS_COPTS_OPTMIZE = -Oz -flto
+        LITEOS_COPTS_OPTIMIZE = -Oz -flto
     else
-        LITEOS_COPTS_OPTMIZE = -O2
+        LITEOS_COPTS_OPTIMIZE = -Os -flto
     endif
 endif
-    LITEOS_COPTS_DEBUG  += $(LITEOS_COPTS_OPTION) $(LITEOS_COPTS_OPTMIZE)
-    LITEOS_CXXOPTS_BASE += $(LITEOS_COPTS_OPTION) $(LITEOS_COPTS_OPTMIZE)
+    LITEOS_COPTS_DEBUG  += $(LITEOS_COPTS_OPTION) $(LITEOS_COPTS_OPTIMIZE)
+    LITEOS_CXXOPTS_BASE += $(LITEOS_COPTS_OPTION) $(LITEOS_COPTS_OPTIMIZE)
     LITEOS_ASOPTS   += $(LITEOS_COPTS_OPTION)
 
 ifeq ($(LOSCFG_SHELL), y)
@@ -452,10 +463,6 @@ ifeq ($(LOSCFG_NET_TELNET), y)
         -I $(LITEOSTOPDIR)/net/telnet/include
 endif
 
-ifeq ($(LOSCFG_3RDPARTY), y)
-    -include $(LITEOSTOPDIR)/3rdParty/3rdParty.mk
-endif
-
 ifeq ($(LOSCFG_KERNEL_SYSCALL), y)
 LITEOS_BASELIB += -lsyscall
 LIB_SUBDIRS += syscall
@@ -492,19 +499,16 @@ endif
 ############################# Security Option End ##############################
 
 ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-CC  = $(LITEOS_COMPILER_PATH)clang
+CC  = $(LITEOS_COMPILER_PATH)clang $(LLVM_TARGET) $(LLVM_SYSROOT)
 AS  = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)as
 AR  = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)ar
 LD  = $(LITEOS_COMPILER_PATH)ld.lld
-GPP = $(LITEOS_COMPILER_PATH)clang++
+GPP = $(LITEOS_COMPILER_PATH)clang++ $(LLVM_TARGET) $(LLVM_SYSROOT)
 OBJCOPY = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)objcopy -R .bss
 OBJDUMP = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)objdump
 SIZE = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)size
 NM = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)nm
 STRIP = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)strip
-LLVM_TARGET := arm-liteos
-LLVM_EXTRA_OPTS := -target $(LLVM_TARGET) -fms-extensions -Wno-address-of-packed-member
-LLVM_EXTRA_LD_OPTS := -fuse-ld=lld --rtlib=compiler-rt
 else
 CC  = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)gcc
 AS  = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)as
@@ -518,11 +522,6 @@ NM = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)nm
 STRIP = $(LITEOS_COMPILER_PATH)$(CROSS_COMPILE)strip
 endif
 
-FP = -fno-omit-frame-pointer
-LITEOS_CXXOPTS_BASE  += -std=c++11 -nostdlib -nostdinc -nostdinc++ -fexceptions -fpermissive -fno-use-cxa-atexit \
-                        -fno-builtin -frtti -fno-pic -Winvalid-pch $(WARNING_AS_ERROR) $(LLVM_EXTRA_OPTS) $(FP)
-
-
 LITEOS_EXTKERNEL_INCLUDE   := $(LITEOS_CPPSUPPORT_INCLUDE) $(LITEOS_DYNLOAD_INCLUDE) \
                               $(LITEOS_TICKLESS_INCLUDE)   $(LITEOS_TRACE_INCLUDE) \
                               $(LITEOS_VDSO_INCLUDE)       $(LITEOS_LITEIPC_INCLUDE) \
@@ -557,20 +556,22 @@ LITEOS_SECURITY_INCLUDE    := $(LITEOS_SECURITY_CAP_INC) $(LITEOS_SECURITY_VID_I
 LOSCFG_TOOLS_DEBUG_INCLUDE := $(LITEOS_SHELL_INCLUDE)  $(LITEOS_UART_INCLUDE) \
                               $(LITEOS_TELNET_INCLUDE)
 
-LITEOS_COPTS_BASE  := -fno-pic -fno-builtin -nostdinc -nostdlib $(WARNING_AS_ERROR) $(LITEOS_SSP) $(LLVM_EXTRA_OPTS) \
-                      -fno-strict-aliasing -fno-common -fsigned-char
+LITEOS_COMMON_OPTS  := -fno-pic -fno-builtin -nostdinc -nostdlib $(WARNING_AS_ERROR) -fms-extensions -fno-omit-frame-pointer -Wno-address-of-packed-member -Winvalid-pch
+
+LITEOS_CXXOPTS_BASE += $(LITEOS_COMMON_OPTS) -std=c++11 -nostdinc++ -fexceptions -fpermissive -fno-use-cxa-atexit -frtti
+
+LITEOS_COPTS_BASE   += $(LITEOS_COMMON_OPTS) $(LITEOS_SSP) -fno-strict-aliasing -fno-common -fsigned-char -mno-unaligned-access
 ifneq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-LITEOS_COPTS_BASE += -fno-aggressive-loop-optimizations
+LITEOS_COPTS_BASE   += -fno-aggressive-loop-optimizations
 endif
-LITEOS_COPTS_EXTRA := -std=c99 -Wpointer-arith -Wstrict-prototypes -Winvalid-pch \
-                      -ffunction-sections -fdata-sections -fno-exceptions $(FP)
-ifneq ($(LOSCFG_ARCH_ARM_AARCH64), y)
+
+LITEOS_COPTS_EXTRA  += -std=c99 -Wpointer-arith -Wstrict-prototypes -ffunction-sections -fdata-sections -fno-exceptions -fno-short-enums
+ifeq ($(LOSCFG_ARCH_ARM_AARCH32), y)
 ifneq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-LITEOS_COPTS_BASE += -mno-unaligned-access
-LITEOS_COPTS_EXTRA += -mthumb-interwork
+LITEOS_COPTS_EXTRA  += -mthumb-interwork
 endif
 endif
-LITEOS_COPTS_EXTRA += -fno-short-enums
+
 ifeq ($(LOSCFG_THUMB), y)
 ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
 LITEOS_CFLAGS_INTERWORK := -mthumb -mimplicit-it=thumb
@@ -595,9 +596,5 @@ LITEOS_LD_SCRIPT := -T$(LITEOSTOPDIR)/tools/build/liteos.ld
 endif
 
 ##compiler##
-_CC = $(CC) $(LITEOS_CORE_COPTS)
-ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-_CC += $(LLVM_EXTRA_OPTS) $(LLVM_EXTRA_LD_OPTS)
-endif
-LITEOS_BASELIB     += $(shell $(_CC) "-print-libgcc-file-name")
-LITEOS_LIB_INCLUDE += -isystem $(shell $(_CC) "-print-file-name=include")
+LITEOS_BASELIB     += $(shell $(CC) $(LITEOS_CORE_COPTS) "-print-libgcc-file-name")
+LITEOS_LIB_INCLUDE += -isystem $(shell $(CC) $(LITEOS_CORE_COPTS) "-print-file-name=include")
diff --git a/tools/build/mk/module.mk b/tools/build/mk/module.mk
index 7242087e..c4378f6b 100644
--- a/tools/build/mk/module.mk
+++ b/tools/build/mk/module.mk
@@ -1,129 +1,114 @@
-# Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
-# Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without modification,
-# are permitted provided that the following conditions are met:
-#
-# 1. Redistributions of source code must retain the above copyright notice, this list of
-#    conditions and the following disclaimer.
-#
-# 2. Redistributions in binary form must reproduce the above copyright notice, this list
-#    of conditions and the following disclaimer in the documentation and/or other materials
-#    provided with the distribution.
-#
-# 3. Neither the name of the copyright holder nor the names of its contributors may be used
-#    to endorse or promote products derived from this software without specific prior written
-#    permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
-# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
-# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-OBJOUT := $(BUILD)$(dir $(subst $(LITEOSTOPDIR),,$(shell pwd)))$(MODULE_NAME)
-
-ifeq ($(LOCAL_SO), y)
-LIBSO := $(OUT)/lib/lib$(MODULE_NAME).so
-LIBA := $(OUT)/lib/lib$(MODULE_NAME).a
-else
-LIBSO :=
-LIBA := $(OUT)/lib/lib$(MODULE_NAME).a
-endif
-LIB := $(LIBA) $(LIBSO)
-
-# create a separate list of objects per source type
-
-LOCAL_CSRCS := $(filter %.c,$(LOCAL_SRCS))
-LOCAL_CPPSRCS := $(filter %.cpp,$(LOCAL_SRCS))
-LOCAL_ASMSRCS := $(filter %.S,$(LOCAL_SRCS))
-LOCAL_ASMSRCS2 := $(filter %.s,$(LOCAL_SRCS))
-LOCAL_CCSRCS := $(filter %.cc,$(LOCAL_SRCS))
-
-LOCAL_COBJS := $(patsubst %.c,$(OBJOUT)/%.o,$(LOCAL_CSRCS))
-LOCAL_CPPOBJS := $(patsubst %.cpp,$(OBJOUT)/%.o,$(LOCAL_CPPSRCS))
-LOCAL_ASMOBJS := $(patsubst %.S,$(OBJOUT)/%.o,$(LOCAL_ASMSRCS))
-LOCAL_ASMOBJS2 := $(patsubst %.s,$(OBJOUT)/%.o,$(LOCAL_ASMSRCS2))
-LOCAL_CCOBJS := $(patsubst %.cc,$(OBJOUT)/%.o,$(LOCAL_CCSRCS))
-
-LOCAL_OBJS := $(LOCAL_COBJS) $(LOCAL_CPPOBJS) $(LOCAL_ASMOBJS) $(LOCAL_ASMOBJS2) $(LOCAL_CCOBJS)
-
-LOCAL_CGCH := $(patsubst %.h,%.h.gch,$(LOCAL_CHS))
-LOCAL_CPPGCH := $(patsubst %.h,%.h.gch,$(LOCAL_CPPHS))
-
-all : $(LIB)
-
-$(LOCAL_COBJS): $(OBJOUT)/%.o: %.c
-	$(HIDE)$(OBJ_MKDIR)
-	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) $(LOCAL_CFLAGS) -c $< -o $@
-
-$(LOCAL_CPPOBJS): $(OBJOUT)/%.o: %.cpp
-	$(HIDE)$(OBJ_MKDIR)
-	$(HIDE)$(GPP) $(LITEOS_CXXFLAGS) $(LOCAL_FLAGS) $(LOCAL_CPPFLAGS) -c $< -o $@
-
-$(LOCAL_ASMOBJS): $(OBJOUT)/%.o: %.S
-	$(HIDE)$(OBJ_MKDIR)
-	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) $(LOCAL_ASFLAGS) -c $< -o $@
-
-$(LOCAL_ASMOBJS2): $(OBJOUT)/%.o: %.s
-	$(HIDE)$(OBJ_MKDIR)
-	$(HIDE)$(AS) $(LITEOS_ASFLAGS) $(LOCAL_FLAGS) $(LOCAL_ASFLAGS) -c $< -o $@
-
-$(LOCAL_CCOBJS): $(OBJOUT)/%.o: %.cc
-	$(HIDE)$(OBJ_MKDIR)
-	$(HIDE)$(GPP) $(LITEOS_CXXFLAGS) $(LOCAL_FLAGS) $(LOCAL_CPPFLAGS) -c $< -o $@
-
-$(LOCAL_CGCH): %.h.gch : %.h
-	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) $(LOCAL_CFLAGS) $> $^
-
-$(LOCAL_CPPGCH): %.h.gch : %.h
-	$(HIDE)$(GPP) $(LITEOS_CXXFLAGS) $(LOCAL_FLAGS) $(LOCAL_CPPFLAGS) -x c++-header $> $^
-
-LOCAL_GCH := $(LOCAL_CGCH) $(LOCAL_CPPGCH)
-
-$(LOCAL_OBJS): $(LOCAL_GCH)
-$(LIBA): $(LOCAL_OBJS)
-	$(HIDE)$(OBJ_MKDIR)
-
-ifeq ($(OS), Linux)
-	$(HIDE)$(AR) $(ARFLAGS) $@ $(LOCAL_OBJS)
-else
-ifeq ($(LOCAL_MODULES),)
-	$(HIDE)$(AR) $(ARFLAGS) $@ $(LOCAL_OBJS)
-else
-	$(HIDE)for i in $(LOCAL_MODULES); do \
-		pushd $(OBJOUT)/$$i 1>/dev/null; \
-		$(AR) $(ARFLAGS) $@ *.o;\
-		popd 1>/dev/null;\
-	done
-endif
-endif
-
-ifeq ($(LOCAL_SO), y)
-$(LIBSO): $(LOCAL_OBJS)
-	$(HIDE)$(CC) $(LITEOS_CFLAGS) -fPIC -shared $^ -o $@
-endif
-
-clean:
-	$(HIDE)$(RM) $(LIB) $(OBJOUT) $(LOCAL_GCH) *.bak *~
-
-.PHONY: all clean
-
-# clear some variables we set here
-LOCAL_CSRCS :=
-LOCAL_CPPSRCS :=
-LOCAL_ASMSRCS :=
-LOCAL_COBJS :=
-LOCAL_CPPOBJS :=
-LOCAL_ASMOBJS :=
-LOCAL_ASMOBJS2 :=
-
-# LOCAL_OBJS is passed back
-#LOCAL_OBJS :=
-
+# Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
+# Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification,
+# are permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+#    conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+#    of conditions and the following disclaimer in the documentation and/or other materials
+#    provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors may be used
+#    to endorse or promote products derived from this software without specific prior written
+#    permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+OBJOUT := $(BUILD)$(dir $(subst $(LITEOSTOPDIR),,$(shell pwd)))$(MODULE_NAME)
+
+MODULE := $(OUT)/lib/lib$(MODULE_NAME).a
+
+# create a separate list of objects per source type
+
+LOCAL_CSRCS := $(filter %.c,$(LOCAL_SRCS))
+LOCAL_CPPSRCS := $(filter %.cpp,$(LOCAL_SRCS))
+LOCAL_ASMSRCS := $(filter %.S,$(LOCAL_SRCS))
+LOCAL_ASMSRCS2 := $(filter %.s,$(LOCAL_SRCS))
+LOCAL_CCSRCS := $(filter %.cc,$(LOCAL_SRCS))
+
+LOCAL_COBJS := $(patsubst %.c,$(OBJOUT)/%.o,$(LOCAL_CSRCS))
+LOCAL_CPPOBJS := $(patsubst %.cpp,$(OBJOUT)/%.o,$(LOCAL_CPPSRCS))
+LOCAL_ASMOBJS := $(patsubst %.S,$(OBJOUT)/%.o,$(LOCAL_ASMSRCS))
+LOCAL_ASMOBJS2 := $(patsubst %.s,$(OBJOUT)/%.o,$(LOCAL_ASMSRCS2))
+LOCAL_CCOBJS := $(patsubst %.cc,$(OBJOUT)/%.o,$(LOCAL_CCSRCS))
+
+LOCAL_OBJS := $(LOCAL_COBJS) $(LOCAL_CPPOBJS) $(LOCAL_ASMOBJS) $(LOCAL_ASMOBJS2) $(LOCAL_CCOBJS)
+
+LOCAL_CGCH := $(patsubst %.h,%.h.gch,$(LOCAL_CHS))
+LOCAL_CPPGCH := $(patsubst %.h,%.h.gch,$(LOCAL_CPPHS))
+
+all : $(MODULE)
+
+define ECHO =
+ifeq ($$(HIDE),@)
+_$(1) := $($(1))
+$(1) = echo "  $(1)" $$(patsubst $$(OUT)/%,%,$$@) && $$(_$(1))
+endif
+endef
+$(foreach cmd,CC GPP AS AR,$(eval $(call ECHO,$(cmd))))
+
+LOCAL_FLAGS += -MD -MP
+-include $(LOCAL_OBJS:%.o=%.d)
+
+$(LOCAL_COBJS): $(OBJOUT)/%.o: %.c
+	$(HIDE)$(OBJ_MKDIR)
+	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) $(LOCAL_CFLAGS) -c $< -o $@
+
+$(LOCAL_CPPOBJS): $(OBJOUT)/%.o: %.cpp
+	$(HIDE)$(OBJ_MKDIR)
+	$(HIDE)$(GPP) $(LITEOS_CXXFLAGS) $(LOCAL_FLAGS) $(LOCAL_CPPFLAGS) -c $< -o $@
+
+$(LOCAL_ASMOBJS): $(OBJOUT)/%.o: %.S
+	$(HIDE)$(OBJ_MKDIR)
+	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) $(LOCAL_ASFLAGS) -c $< -o $@
+
+$(LOCAL_ASMOBJS2): $(OBJOUT)/%.o: %.s
+	$(HIDE)$(OBJ_MKDIR)
+	$(HIDE)$(AS) $(LITEOS_ASFLAGS) $(LOCAL_FLAGS) $(LOCAL_ASFLAGS) -c $< -o $@
+
+$(LOCAL_CCOBJS): $(OBJOUT)/%.o: %.cc
+	$(HIDE)$(OBJ_MKDIR)
+	$(HIDE)$(GPP) $(LITEOS_CXXFLAGS) $(LOCAL_FLAGS) $(LOCAL_CPPFLAGS) -c $< -o $@
+
+$(LOCAL_CGCH): %.h.gch : %.h
+	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) $(LOCAL_CFLAGS) $> $^
+
+$(LOCAL_CPPGCH): %.h.gch : %.h
+	$(HIDE)$(GPP) $(LITEOS_CXXFLAGS) $(LOCAL_FLAGS) $(LOCAL_CPPFLAGS) -x c++-header $> $^
+
+LOCAL_GCH := $(LOCAL_CGCH) $(LOCAL_CPPGCH)
+
+$(LOCAL_OBJS): $(LOCAL_GCH)
+$(MODULE): $(LOCAL_OBJS)
+	$(HIDE)$(OBJ_MKDIR)
+	$(HIDE)$(AR) $(ARFLAGS) $@ $^
+
+clean:
+	$(HIDE)$(RM) $(MODULE) $(OBJOUT) $(LOCAL_GCH) *.bak *~
+
+.PHONY: all clean
+
+# clear some variables we set here
+LOCAL_CSRCS :=
+LOCAL_CPPSRCS :=
+LOCAL_ASMSRCS :=
+LOCAL_COBJS :=
+LOCAL_CPPOBJS :=
+LOCAL_ASMOBJS :=
+LOCAL_ASMOBJS2 :=
+
+# LOCAL_OBJS is passed back
+#LOCAL_OBJS :=