diff --git a/BUILD.gn b/BUILD.gn
index ea2e9ebe..110c1ac1 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -88,6 +88,10 @@ exec_script("//build/lite/run_shell_cmd.py",
 
 import("liteos.gni")
 
+assert(ARCH != "", "ARCH not set!")
+assert(ARCH == arch, "ARCH not match! details: $ARCH != $arch")
+assert(tee_enable == defined(LOSCFG_TEE_ENABLE), "TEE switch not match!")
+
 generate_notice_file("kernel_notice_file") {
   module_name = "kernel"
   module_source_dir_list = [
@@ -200,7 +204,13 @@ config("optimize_config") {
     } else {
       optimization_cflag = "-Os"
     }
-    cflags += [ "-flto" ]
+  }
+  if (defined(LOSCFG_COMPILE_LTO)) {
+    if (defined(LOSCFG_COMPILER_CLANG_LLVM)) {
+      cflags += [ "-flto=thin" ]
+    } else {
+      cflags += [ "-flto" ]
+    }
   }
   cflags += [ optimization_cflag ]
   asmflags = cflags
@@ -223,11 +233,6 @@ config("warn_config") {
     "-Winvalid-pch",
     "-Wno-address-of-packed-member",
   ]
-
-  if (defined(LOSCFG_QUICK_START)) {
-    cflags -= [ "-Werror" ]
-  }
-
   asmflags = cflags
 }
 
@@ -279,7 +284,7 @@ config("los_config") {
 
 executable("liteos") {
   configs = [] # clear default configs
-  configs += [ ":los_config" ]
+  configs += [ ":arch_config" ]
   configs += [ ":public" ]
 
   ldflags = [
@@ -304,18 +309,17 @@ executable("liteos") {
   inputs += [ "$root_out_dir/board.ld" ]
 
   output_dir = target_out_dir
-  output_name = liteos_name
 
   deps = [
-    "platform:board.ld",
+    "platform:copy_board.ld",
     ":modules",
   ]
 }
 
 copy("copy_liteos") {
   deps = [ ":liteos" ]
-  sources = [ "$target_out_dir/unstripped/bin/$liteos_name" ]
-  outputs = [ "$root_out_dir/{{source_file_part}}" ]
+  sources = [ "$target_out_dir/unstripped/bin/liteos" ]
+  outputs = [ "$root_out_dir/$liteos_name" ]
 }
 
 build_ext_component("build_kernel_image") {
diff --git a/Kconfig b/Kconfig
index 75703e0b..2eb6b244 100644
--- a/Kconfig
+++ b/Kconfig
@@ -74,6 +74,14 @@ config COMPILE_OPTIMIZE_SIZE
     help
       Answer Y to add optimization options for small code size.
       The final binary size will be smaller.
+      But the compile time may be a bit longer.
+
+config COMPILE_LTO
+    bool "Enable link time optimization (LTO)" if COMPILE_OPTIMIZE_SIZE
+    default y
+    help
+      Answer Y to add lto options for more smaller code size.
+      The final binary size will be smaller.
       But the compile time may be much longer.
 
 endmenu
diff --git a/Makefile b/Makefile
index 9f6fda2b..258cd398 100644
--- a/Makefile
+++ b/Makefile
@@ -27,7 +27,7 @@
 # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-LITEOSTOPDIR := $(realpath $(dir $(firstword $(MAKEFILE_LIST))))
+LITEOSTOPDIR := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
 export LITEOSTOPDIR
 
 APPS = apps
diff --git a/kernel/common/patchfs/BUILD.gn b/kernel/common/patchfs/BUILD.gn
index 28d5e761..bf74298c 100644
--- a/kernel/common/patchfs/BUILD.gn
+++ b/kernel/common/patchfs/BUILD.gn
@@ -40,5 +40,4 @@ kernel_module(module_name) {
 }
 
 config("public") {
-  include_dirs = [ "." ]
 }
diff --git a/kernel/common/patchfs/Makefile b/kernel/common/patchfs/Makefile
index 64d68764..eab29ad3 100644
--- a/kernel/common/patchfs/Makefile
+++ b/kernel/common/patchfs/Makefile
@@ -4,10 +4,4 @@ MODULE_NAME := $(notdir $(shell pwd))
 
 LOCAL_SRCS := $(wildcard *.c)
 
-LOCAL_INCLUDE := \
-        -I $(LITEOSTOPDIR)/kernel/common \
-        -I $(LITEOSTOPDIR)/kernel/common/patchfs \
-
-LOCAL_FLAGS := $(LOCAL_INCLUDE) $(LITEOS_GCOV_OPTS)
-
 include $(MODULE)
diff --git a/liteos.gni b/liteos.gni
index dcbf1410..bfff15e5 100644
--- a/liteos.gni
+++ b/liteos.gni
@@ -40,9 +40,6 @@ if (defined(LOSCFG_ARCH_ARM_AARCH32)) {
   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 444695c5..d2d4a74f 100644
--- a/platform/BUILD.gn
+++ b/platform/BUILD.gn
@@ -66,23 +66,16 @@ config("public") {
   include_dirs = [ "." ]
 }
 
-source_set("board") {
+kernel_module("board.ld") {
   sources = [ "board.ld.S" ]
-
-  configs = []
-  configs += [
-    "$LITEOSTOPDIR:los_config",
-    "$LITEOSTOPDIR:public",
-  ]
-
   asmflags = [
     "-P",
     "-E",
   ]
 }
 
-copy("board.ld") {
-  deps = [ ":board" ]
-  sources = [ "$target_out_dir/board.board.ld.o" ]
+copy("copy_board.ld") {
+  deps = [ ":board.ld" ]
+  sources = [ "$target_out_dir/board.ld.board.ld.o" ]
   outputs = [ "$root_out_dir/board.ld" ]
 }
diff --git a/platform/Makefile b/platform/Makefile
index 57951cb2..5cf034df 100644
--- a/platform/Makefile
+++ b/platform/Makefile
@@ -44,22 +44,6 @@ ifneq ($(LOSCFG_BASE_CORE_HILOG), y)
 LOCAL_SRCS := $(filter-out los_hilog.c, $(LOCAL_SRCS))
 endif
 
-ifeq ($(LOSCFG_KERNEL_TICKLESS), y)
-LOCAL_INCLUDE += -I $(LITEOSTOPDIR)/kernel/extended/include
-endif
-
-ifeq ($(LOSCFG_KERNEL_TRACE), y)
-LOCAL_INCLUDE += -I $(LITEOSTOPDIR)/kernel/extended/include
-endif
-
-ifeq ($(LOSCFG_KERNEL_CPUP), y)
-LOCAL_INCLUDE += -I $(LITEOSTOPDIR)/kernel/extended/include
-endif
-
-ifeq ($(LOSCFG_KERNEL_VDSO), y)
-LOCAL_INCLUDE += -I $(LITEOSTOPDIR)/kernel/extended/vdso/include
-endif
-
 ALL_ASSRCS := $(wildcard *.S)
 ASSRCS := $(filter-out board.ld.S,$(ALL_ASSRCS))
 
@@ -68,9 +52,8 @@ LOCAL_SRCS += $(ASSRCS)
 LOCAL_FLAGS := $(LOCAL_INCLUDE) $(LITEOS_GCOV_OPTS)
 
 BOARD_LD = $(OUT)/lib/board.ld
-$(BOARD_LD): board.ld.S $(LITEOS_MENUCONFIG_H)
-	$(HIDE)$(CC) -I$(LITEOSTOPDIR)/kernel/base/include -I$(LITEOSTOPDIR)/../../$(LOSCFG_BOARD_CONFIG_PATH) -I. \
-		-imacros $(LITEOS_MENUCONFIG_H) -P -E $< -o $@
+$(BOARD_LD): board.ld.S
+	$(HIDE)$(CC) $(LITEOS_CFLAGS) -P -E $< -o $@
 
 .PHONY: rm_board_ld
 rm_board_ld:
diff --git a/platform/bsp.mk b/platform/bsp.mk
index c4ac4120..5d065491 100644
--- a/platform/bsp.mk
+++ b/platform/bsp.mk
@@ -27,31 +27,13 @@
 # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-############################# SRCs #################################
-HWI_SRC     :=
-MMU_SRC     :=
-NET_SRC     :=
-TIMER_SRC   :=
-HRTIMER_SRC :=
-USB_SRC     :=
-
-############################# HI3516DV300 Options#################################
-
-########################## HI3518EV300 Options##############################
-
-########################## Qemu ARM Virt Options##############################
-
 LITEOS_BASELIB       += -lbsp -lbsp_config
 
 PLATFORM_BSP_BASE := $(LITEOSTOPDIR)/platform
 
 PLATFORM_INCLUDE := -I $(LITEOSTOPDIR)/../../$(LOSCFG_BOARD_CONFIG_PATH) \
                     -I $(LITEOSTOPDIR)/../../$(LOSCFG_BOARD_CONFIG_PATH)/include \
-                    -I $(PLATFORM_BSP_BASE)/../kernel/common/rootfs \
-                    -I $(PLATFORM_BSP_BASE) \
-                    -I $(PLATFORM_BSP_BASE)/../../../drivers/liteos/platform/pm \
-                    -I $(PLATFORM_BSP_BASE)/hw/include \
-                    -I $(PLATFORM_BSP_BASE)/include
+                    -I $(PLATFORM_BSP_BASE)
 
 LIB_SUBDIRS             += $(PLATFORM_BSP_BASE) $(LITEOSTOPDIR)/../../$(LOSCFG_BOARD_CONFIG_PATH)
 LITEOS_PLATFORM_INCLUDE += $(PLATFORM_INCLUDE)
diff --git a/tools/build/mk/los_config.mk b/tools/build/mk/los_config.mk
index 02245388..dbb529cf 100644
--- a/tools/build/mk/los_config.mk
+++ b/tools/build/mk/los_config.mk
@@ -30,16 +30,6 @@
 -include $(LITEOS_CONFIG_FILE)
 
 HIDE := @
-CC  :=
-AS  :=
-AR  :=
-LD  :=
-GPP :=
-OBJCOPY :=
-OBJDUMP :=
-SIZE :=
-NM :=
-MKDIR = mkdir
 OBJ_MKDIR = if [ ! -d $(dir $@) ]; then mkdir -p $(dir $@); fi
 RM = -rm -rf
 ifeq ($(OS),)
@@ -121,12 +111,6 @@ MODULE = $(LITEOSTOPDIR)/tools/build/mk/module.mk
 LITEOS_CMACRO      += -D__LITEOS__ -DSECUREC_IN_KERNEL=0
 AS_OBJS_LIBC_FLAGS  = -D__ASSEMBLY__
 
-ifeq ($(LOSCFG_QUICK_START), y)
-WARNING_AS_ERROR   := -Wall
-else
-WARNING_AS_ERROR   := -Wall -Werror
-endif
-
 ####################################### CPU Option Begin #########################################
 include $(LITEOSTOPDIR)/arch/cpu.mk
 ####################################### CPU Option End #########################################
@@ -137,6 +121,7 @@ include $(LITEOSTOPDIR)/platform/bsp.mk
 ifeq ($(LOSCFG_PLATFORM_ROOTFS), y)
     LITEOS_BASELIB  += -lrootfs
     LIB_SUBDIRS     += $(LITEOSTOPDIR)/kernel/common/rootfs
+    LITEOS_PLATFORM_INCLUDE     += -I $(LITEOSTOPDIR)/kernel/common/rootfs
 endif
 
 ifeq ($(LOSCFG_PLATFORM_PATCHFS), y)
@@ -440,9 +425,16 @@ ifeq ($(LOSCFG_COMPILE_OPTIMIZE), y)
 endif
 ifeq ($(LOSCFG_COMPILE_OPTIMIZE_SIZE), y)
     ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
-        LITEOS_COPTS_OPTIMIZE = -Oz -flto
+        LITEOS_COPTS_OPTIMIZE = -Oz
     else
-        LITEOS_COPTS_OPTIMIZE = -Os -flto
+        LITEOS_COPTS_OPTIMIZE = -Os
+    endif
+endif
+ifeq ($(LOSCFG_COMPILE_LTO), y)
+    ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
+        LITEOS_COPTS_OPTIMIZE += -flto=thin
+    else
+        LITEOS_COPTS_OPTIMIZE += -flto
     endif
 endif
     LITEOS_COPTS_DEBUG  += $(LITEOS_COPTS_OPTION) $(LITEOS_COPTS_OPTIMIZE)
@@ -556,7 +548,7 @@ 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_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_COMMON_OPTS  := -fno-pic -fno-builtin -nostdinc -nostdlib -Wall -Werror -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