diff --git a/app/Makefile b/app/Makefile
deleted file mode 100755
index b475445025fc44032c5d84604381a0b070b197c5..0000000000000000000000000000000000000000
--- a/app/Makefile
+++ /dev/null
@@ -1,83 +0,0 @@
-# Copyright (c) 2020 Huawei Device Co., Ltd.
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-BASE_DIR := $(shell if [ "$$PWD" != "" ]; then echo $$PWD; else pwd; fi)
-
-BUILD_SUBDIRS = src
-
-MAKEFILE_PATH := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
-LITEOSTOPDIR = ${MAKEFILE_PATH}/../../../../kernel/liteos_a
-CROSS_COMPILE = arm-linux-ohoseabi-
-LITEOS_COMPILER_PATH := $(shell $(LITEOSTOPDIR)/tools/build/mk/get_compiler_path.sh  $(CROSS_COMPILE) $(LITEOSTOPDIR))
-STRIP = ${LITEOS_COMPILER_PATH}/bin/$(CROSS_COMPILE)strip --strip-unneeded
-
-APP_DIR = $(BASE_DIR)
-
-FSIMG_SUBDIR = bin
-FSIMG_DIR = $(APP_DIR)/$(FSIMG_SUBDIR)
-APP_IMG = $(APP_DIR)/app.img
-
-LIBCIMG_SUBDIR = lib
-LIBCIMG_DIR = $(APP_DIR)/$(LIBCIMG_SUBDIR)
-LIBCFS_IMG = $(APP_DIR)/libc.img
-
-# Hide
-Q = @
-
-define DIR_template
-$(1)_$(2):
-	$(Q) $(MAKE) -C $(1) $(3) APP_DIR="$(APP_DIR)" FSIMG_DIR="$(FSIMG_DIR)" Q="$(Q)" LITEOS_COMPILER_PATH="$(LITEOS_COMPILER_PATH)" CROSS_COMPILE="$(CROSS_COMPILE)"
-endef
-
-all: $(APP_IMG) $(LIBCFS_IMG)
-.PHONY: all build clean install populate
-
-$(foreach DIR, $(BUILD_SUBDIRS), $(eval $(call DIR_template,$(DIR),build, all)))
-$(foreach DIR, $(BUILD_SUBDIRS), $(eval $(call DIR_template,$(DIR),clean,clean)))
-$(foreach DIR, $(BUILD_SUBDIRS), $(eval $(call DIR_template,$(DIR),install,install)))
-
-# Build program(s) in each sud-directory
-
-build: $(foreach DIR, $(BUILD_SUBDIRS), $(DIR)_build)
-
-# Install each program in the file system image directory
-
-install: $(foreach DIR, $(BUILD_SUBDIRS), $(DIR)_install)
-	$(Q) $(STRIP) $(wildcard $(FSIMG_SUBDIR)/*)
-	$(Q) $(STRIP) $(wildcard $(LIBCIMG_SUBDIR)/*)
-
-# Create the file system image directory
-
-$(FSIMG_DIR):
-	$(Q) mkdir -p $(FSIMG_DIR)
-
-# Populate the file system image directory
-
-populate:  $(FSIMG_DIR) build install
-
-# Create the img file from the populated fs directory
-
-$(APP_IMG): populate
-
-# Create the libc.img file
-
-$(LIBCFS_IMG):
-	$(Q) mkdir -p $(LIBCIMG_DIR)
-
-# Clean each subdirectory
-
-clean: $(foreach DIR, $(BUILD_SUBDIRS), $(DIR)_clean)
-	$(Q) rm -f $(DIRLIST_HDR) $(APP_IMG) $(SYMTAB_SRC) $(LIBCFS_IMG)
-	$(Q) rm -rf $(FSIMG_DIR) $(LIBCIMG_DIR)
-
-
diff --git a/app/src/Makefile b/app/src/Makefile
deleted file mode 100755
index be590497ec59faebceca1ef037466f8eb06a1097..0000000000000000000000000000000000000000
--- a/app/src/Makefile
+++ /dev/null
@@ -1,83 +0,0 @@
-# Copyright (c) 2020 Huawei Device Co., Ltd.
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Choose the type of compiling:
-# "STATIC_COMPILE = y" means compiling in a static way,
-# "STATIC_COMPILE = n" means compiling in a dynamic way.
-STATIC_COMPILE = n
-
-BIN = helloworld
-BIN_ASM = $(BIN).asm
-OBJEXT = .o
-
-CC = ${LITEOS_COMPILER_PATH}/bin/$(CROSS_COMPILE)gcc
-CPP = ${LITEOS_COMPILER_PATH}/bin/$(CROSS_COMPILE)g++
-LD = ${LITEOS_COMPILER_PATH}/bin/$(CROSS_COMPILE)ld
-OBJDUMP = ${LITEOS_COMPILER_PATH}/bin/$(CROSS_COMPILE)objdump
-
-COMMON_INCLUDE = -I $(APP_DIR)/include/
-COMMON_FLAGS = -fPIE -D_XOPEN_SOURCE=700
-
-CFLAGS += -fno-omit-frame-pointer -std=c99 $(COMMON_INCLUDE) $(COMMON_FLAGS)
-CXXFLAGS += $(COMMON_INCLUDE) $(COMMON_FLAGS)
-
-ifeq ($(STATIC_COMPILE), y)
-	LDFLAGS = --static
-else
-	LDFLAGS = -pie
-endif
-
-CCSRCS := $(wildcard *.c)
-CCOBJS = $(CCSRCS:.c=$(OBJEXT))
-CXXSRCS := $(wildcard *.cpp)
-CXXOBJS = $(CXXSRCS:.cpp=$(OBJEXT))
-
-MUSL = musl/lib/libc.so
-
-all: $(MUSL) $(BIN) $(BIN_ASM)
-
-$(CCOBJS): %$(OBJEXT): %.c
-	@echo "CC: $<"
-	$(Q) $(CC) -c $(CFLAGS) $< -o $@
-
-$(CXXOBJS): %$(OBJEXT): %.cpp
-	@echo "CPP: $<"
-	$(Q) $(CPP) -c $(CXXFLAGS) $< -o $@
-
-$(BIN_ASM): $(BIN)
-	$(Q) rm -rf $(CCOBJS) $(CXXOBJS)
-	$(Q) $(OBJDUMP) -d $(BIN) > $(BIN_ASM)
-
-$(MUSL):
-	$(Q) rm -rf musl/
-	$(Q) ./build_musl.sh &> build_musl.log
-
-$(BIN): $(MUSL) $(CCOBJS) $(CXXOBJS)
-ifeq ($(STATIC_COMPILE), y)
-	@echo "LD: $^"
-	$(Q) $(CC) $(LDFLAGS) -o $@ $^
-else
-	@echo "LD: $^"
-	$(Q)mkdir -p $(APP_DIR)/lib/
-	$(Q)cp -f $(APP_DIR)/src/musl/lib/libc.so $(APP_DIR)/lib/libc.so
-	$(Q)$(CC) $(LDFLAGS) -o $@ $(CCOBJS) $(CXXOBJS)
-endif
-
-clean:
-	$(Q) rm -rf $(CCOBJS) $(CXXOBJS) $(BIN) $(BIN_ASM)
-	$(Q) rm -rf musl/
-	$(Q) rm -rf build_musl.log
-
-install:
-	$(Q) mkdir -p $(FSIMG_DIR)
-	$(Q) install $(BIN) $(FSIMG_DIR)/$(BIN)
diff --git a/app/src/build_musl.sh b/app/src/build_musl.sh
deleted file mode 100755
index 93d7f499d252a1df575dec781b0d1c6b6882c094..0000000000000000000000000000000000000000
--- a/app/src/build_musl.sh
+++ /dev/null
@@ -1,43 +0,0 @@
-#!/bin/bash
-
-# Copyright (c) 2020 Huawei Device Co., Ltd.
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-set -e
-
-readonly MUSL_DIR="$PWD/musl"
-readonly MUSL_SOURCE="$PWD/../../../../../third_party/musl/*"
-export SYSROOT="$PWD/../../../../../prebuilts/gcc/linux-x86/arm/arm-linux-ohoseabi-gcc/target"
-readonly LITEOSTOPDIR="$PWD/../../../../../kernel/liteos_a"
-
-BUILD=`gcc -dumpmachine`
-HOST=`gcc -dumpmachine`
-TARGET=arm-linux-ohoseabi
-CROSS_COMPILER=arm-linux-ohoseabi-
-CFLAGS_FOR_TARGET="-O2 -Wall -fstack-protector-strong -D_FORTIFY_SOURCE=2 -Wl,-z,relro,-z,now,-z,noexecstack -Wtrampolines"
-
-PARALLEL=`grep ^processor /proc/cpuinfo|wc -l`
-LITEOS_COMPILER_PATH=`${LITEOSTOPDIR}/tools/build/mk/get_compiler_path.sh  ${CROSS_COMPILER} ${LITEOSTOPDIR}`
-
-export PATH="${LITEOS_COMPILER_PATH}/bin:$PATH"
-
-#prepare to build musl
-mkdir -p  $MUSL_DIR
-cp -r $MUSL_SOURCE $MUSL_DIR
-
-#build musl
-pushd $MUSL_DIR
-CC="${LITEOS_COMPILER_PATH}/bin/${CROSS_COMPILER}gcc $CFLAGS_FOR_TARGET" ./configure  --with-headers=$SYSROOT/usr/include  --build=$BUILD --host=$TARGET
-make -j $PARALLEL CROSS=$CROSS_COMPILER
-popd
-