diff --git a/lib/libc/Makefile b/lib/libc/Makefile
index 66a4146b524312035aedd4cc823646608747661a..1941622583d32ed572cf83b41a52c54f4522e187 100644
--- a/lib/libc/Makefile
+++ b/lib/libc/Makefile
@@ -2,188 +2,45 @@ include $(LITEOSTOPDIR)/config.mk
 
 MODULE_NAME := c
 
-LOCAL_MODULES = \
-	musl/src/ctype \
-	musl/src/env \
-	musl/src/errno \
-	musl/src/exit \
-	musl/src/internal \
-	musl/src/linux \
-	musl/src/locale \
-	musl/src/malloc \
-	musl/src/multibyte \
-	musl/src/network \
-	musl/src/prng \
-	musl/src/sched \
-	musl/src/stdio \
-	musl/src/stdlib \
-	musl/src/string \
-	musl/src/math \
-	musl/src/time
+ARCH = arm
+TOPDIR = $(LITEOSTOPDIR)/../..
+MUSLDIR = $(TOPDIR)/third_party/musl
+MUSLPORTINGDIR = $(MUSLDIR)/porting/liteos_a/kernel
+OPTRTDIR = $(TOPDIR)/third_party/optimized-routines
 
-LOCAL_SRCS = $(wildcard musl/src/ctype/*.c) \
-	$(wildcard musl/src/env/*.c) \
-	$(wildcard musl/src/errno/*.c) \
-	$(wildcard musl/src/exit/*.c) \
-	$(wildcard musl/src/linux/*.c) \
-	$(wildcard musl/src/locale/*.c) \
-	$(wildcard musl/src/malloc/*.c) \
-	$(wildcard musl/src/multibyte/*.c) \
-	$(wildcard musl/src/network/*.c) \
-	$(wildcard musl/src/prng/*.c) \
-	$(wildcard musl/src/sched/*.c) \
-	$(wildcard musl/src/stdlib/*.c)
+MUSL_SRCS =
 
-ifeq ($(LOSCFG_ARCH_ARM_VER), "armv7-a")
-LOCAL_SRCS += \
-	optimization/arm/memchr.S \
-	optimization/arm/memcpy.S \
-	optimization/arm/strcmp.S \
-	optimization/arm/strcpy.c \
-	optimization/arm/strlen.S
-endif
+MUSLPORTING_SRCS = \
+	src/*/$(ARCH)/*.[csS] \
+	src/*/*.c
 
-LOCAL_SRCS_MATH = $(wildcard musl/src/math/*.c)
-LOCAL_SRCS_INTERNAL = $(wildcard musl/src/internal/*.c)
-LOCAL_SRCS_STDIO = $(wildcard musl/src/stdio/*.c)
-LOCAL_SRCS_STRING = $(wildcard musl/src/string/*.c)
-LOCAL_SRCS_TIME = $(wildcard musl/src/time/*.c)
+LOCAL_SRCS = $(wildcard $(addprefix $(MUSLPORTINGDIR)/,$(MUSLPORTING_SRCS)))
+LOCAL_SRCS := $(filter-out $(subst $(MUSLPORTINGDIR),$(MUSLDIR),$(LOCAL_SRCS)),$(addprefix $(MUSLDIR)/,$(MUSL_SRCS)) $(LOCAL_SRCS))
 
 ifeq ($(LOSCFG_ARCH_ARM_VER), "armv7-a")
-LOCAL_FILTER_SRCS_STRING = memchr.c memcpy.c strcmp.c strcpy.c strlen.c
-LOCAL_SRCS_STRING := $(filter-out $(LOCAL_FILTER_SRCS_STRING),$(wildcard musl/src/string/*.c))
+LOCAL_SRCS := $(filter-out $(addprefix $(MUSLDIR)/src/string/,memchr.c memcpy.c strcmp.c strcpy.c strlen.c), $(LOCAL_SRCS))
+LOCAL_SRCS += \
+	$(OPTRTDIR)/string/arm/memchr.S \
+	$(OPTRTDIR)/string/arm/memcpy.S \
+	$(OPTRTDIR)/string/arm/strcmp.S \
+	$(OPTRTDIR)/string/arm/strcpy.c \
+	$(OPTRTDIR)/string/arm/strlen-armv6t2.S
 endif
 
+LOCAL_SRCS += $(wildcard src/*.c src/*/*.c)
+
 LOCAL_INCLUDE := \
-	-I $(LITEOSTOPDIR)/lib/libc/musl/include \
-	-I $(LITEOSTOPDIR)/lib/libc/musl/arch/arm \
-	-I $(LITEOSTOPDIR)/lib/libc/musl/arch/generic \
-	-I $(LITEOSTOPDIR)/lib/libc/musl/obj/include \
-	-I $(LITEOSTOPDIR)/lib/libc/musl/src/include \
-	-I $(LITEOSTOPDIR)/lib/libc/musl/src/dirent \
-	-I $(LITEOSTOPDIR)/lib/libc/musl/src/errno \
-	-I $(LITEOSTOPDIR)/lib/libc/musl/src/internal \
-	-I $(LITEOSTOPDIR)/lib/libc/musl/src/multibyte \
-	-I $(LITEOSTOPDIR)/lib/libc/musl/src/time \
 	-I $(LITEOSTOPDIR)/syscall \
 	-I $(LITEOSTOPDIR)/bsd/dev/random \
 	-I $(LITEOSTOPDIR)/bsd/compat/linuxkpi/include
 
-ifeq ($(LOSCFG_LLTSER), y)
-LOCAL_INCLUDE += -I $(LITEOSTOPDIR)/tools/gcov_ser
-endif
+LOCAL_INCLUDE += $(addprefix -I$(MUSLPORTINGDIR)/, src/include src/internal)
 
-LOCAL_FLAGS := $(LOCAL_INCLUDE)
+LOCAL_FLAGS := $(LOCAL_INCLUDE) $(LITEOS_GCOV_OPTS)
 ifeq ($(LOSCFG_COMPILER_CLANG_LLVM), y)
 LOCAL_FLAGS +=-Wno-char-subscripts -Wno-unknown-pragmas
 else
 LOCAL_FLAGS += -frounding-math -Wno-unused-but-set-variable -Wno-unknown-pragmas
 endif
 
-ifeq ($(OS), Linux)
-OBJOUT := $(BUILD)$(dir $(subst $(LITEOSTOPDIR),,$(shell pwd)))$(MODULE_NAME)
-LOCAL_PWD := $(shell pwd)
-else
-TEMPLITEOSTOPDIR:=$(shell cygpath -u $(LITEOSTOPDIR))
-OBJOUT := $(BUILD)$(dir $(subst $(TEMPLITEOSTOPDIR),,$(shell pwd)))$(MODULE_NAME)
-LOCAL_PWD := $(shell cygpath -m $(shell pwd))
-endif
-
-ifeq ($(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_CSRCS_MATH := $(filter %.c,$(LOCAL_SRCS_MATH))
-LOCAL_CSRCS_INTERNAL := $(filter %.c,$(LOCAL_SRCS_INTERNAL))
-LOCAL_CSRCS_STDIO := $(filter %.c,$(LOCAL_SRCS_STDIO))
-LOCAL_CSRCS_STRING := $(filter %.c,$(LOCAL_SRCS_STRING))
-LOCAL_CSRCS_TIME := $(filter %.c,$(LOCAL_SRCS_TIME))
-
-LOCAL_ASMSRCS := $(filter %.S,$(LOCAL_SRCS))
-
-LOCAL_COBJS := $(patsubst %.c,$(OBJOUT)/%.o,$(LOCAL_CSRCS))
-LOCAL_COBJS_MATH := $(patsubst %.c,$(OBJOUT)/%.o,$(LOCAL_CSRCS_MATH))
-LOCAL_COBJS_INTERNAL := $(patsubst %.c,$(OBJOUT)/%.o,$(LOCAL_CSRCS_INTERNAL))
-LOCAL_COBJS_STDIO := $(patsubst %.c,$(OBJOUT)/%.o,$(LOCAL_CSRCS_STDIO))
-LOCAL_COBJS_STRING := $(patsubst %.c,$(OBJOUT)/%.o,$(LOCAL_CSRCS_STRING))
-LOCAL_COBJS_TIME := $(patsubst %.c,$(OBJOUT)/%.o,$(LOCAL_CSRCS_TIME))
-
-LOCAL_ASMOBJS := $(patsubst %.S,$(OBJOUT)/%.o,$(LOCAL_ASMSRCS))
-
-LOCAL_OBJS := $(LOCAL_COBJS) $(LOCAL_ASMOBJS) $(LOCAL_COBJS_MATH) $(LOCAL_COBJS_INTERNAL) $(LOCAL_COBJS_STDIO) $(LOCAL_COBJS_STRING) $(LOCAL_COBJS_TIME)
-LOCAL_CGCH := $(patsubst %.h,%.h.gch,$(LOCAL_CHS))
-LOCAL_CPPGCH := $(patsubst %.h,%.h.gch,$(LOCAL_CPPHS))
-
-all : $(LIB)
-
-$(LOCAL_COBJS): $(OBJOUT)/%.o: %.c sub_math
-	$(HIDE)$(OBJ_MKDIR)
-	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) -c $< -o $@
-
-$(LOCAL_ASMOBJS): $(OBJOUT)/%.o: %.S
-	$(HIDE)$(OBJ_MKDIR)
-	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) -c $< -o $@
-
-sub_math:
-	$(HIDE)$(MAKE) -C musl/src/math all LOCAL_COBJS_MATH="$(LOCAL_COBJS_MATH)" OBJOUT="$(OBJOUT)" LOCAL_FLAGS="$(LOCAL_FLAGS)"
-
-sub_internal: sub_math
-	$(HIDE)$(MAKE) -C musl/src/internal all LOCAL_COBJS_INTERNAL="$(LOCAL_COBJS_INTERNAL)" OBJOUT="$(OBJOUT)" LOCAL_FLAGS="$(LOCAL_FLAGS)"
-
-sub_stdio: sub_math
-	$(HIDE)$(MAKE) -C musl/src/stdio all LOCAL_COBJS_STDIO="$(LOCAL_COBJS_STDIO)" OBJOUT="$(OBJOUT)" LOCAL_FLAGS="$(LOCAL_FLAGS)"
-
-sub_string: sub_math
-	$(HIDE)$(MAKE) -C musl/src/string all LOCAL_COBJS_STRING="$(LOCAL_COBJS_STRING)" OBJOUT="$(OBJOUT)" LOCAL_FLAGS="$(LOCAL_FLAGS)"
-
-sub_time: sub_math
-	$(HIDE)$(MAKE) -C musl/src/time all LOCAL_COBJS_TIME="$(LOCAL_COBJS_TIME)" OBJOUT="$(OBJOUT)" LOCAL_FLAGS="$(LOCAL_FLAGS)"
-
-$(LOCAL_CGCH): %.h.gch : %.h
-	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) $> $^
-
-$(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) sub_math sub_internal sub_stdio sub_string sub_time
-	$(HIDE)$(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 sub_math sub_internal sub_stdio sub_string sub_time
-
-# clear some variables we set here
-LOCAL_CSRCS :=
-LOCAL_COBJS :=
-
+include $(MODULE)
diff --git a/lib/libc/musl b/lib/libc/musl
deleted file mode 120000
index 939d63a1539bd61b9112b74c2a06c841b843be97..0000000000000000000000000000000000000000
--- a/lib/libc/musl
+++ /dev/null
@@ -1 +0,0 @@
-../../../../third_party/musl/kernel
\ No newline at end of file
diff --git a/lib/libc/optimization/arm/memchr.S b/lib/libc/optimization/arm/memchr.S
deleted file mode 120000
index eda33c218cf0ade0d63f863c60fd042da6a1ee35..0000000000000000000000000000000000000000
--- a/lib/libc/optimization/arm/memchr.S
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../../third_party/optimized-routines/string/arm/memchr.S
\ No newline at end of file
diff --git a/lib/libc/optimization/arm/memcpy.S b/lib/libc/optimization/arm/memcpy.S
deleted file mode 120000
index 2c97f410ea23f9bfac370b3fec7d4cd574188a64..0000000000000000000000000000000000000000
--- a/lib/libc/optimization/arm/memcpy.S
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../../third_party/optimized-routines/string/arm/memcpy.S
\ No newline at end of file
diff --git a/lib/libc/optimization/arm/strcmp.S b/lib/libc/optimization/arm/strcmp.S
deleted file mode 120000
index 921ebe90e95900dddbfefa239b18d7f1e50e7c26..0000000000000000000000000000000000000000
--- a/lib/libc/optimization/arm/strcmp.S
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../../third_party/optimized-routines/string/arm/strcmp.S
\ No newline at end of file
diff --git a/lib/libc/optimization/arm/strcpy.c b/lib/libc/optimization/arm/strcpy.c
deleted file mode 120000
index ab07c4d157b820042e213f95bf82a881778c24b3..0000000000000000000000000000000000000000
--- a/lib/libc/optimization/arm/strcpy.c
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../../third_party/optimized-routines/string/arm/strcpy.c
\ No newline at end of file
diff --git a/lib/libc/optimization/arm/strlen.S b/lib/libc/optimization/arm/strlen.S
deleted file mode 120000
index eecf51cce11ac14ea21a6a42f58b9dc228ee7384..0000000000000000000000000000000000000000
--- a/lib/libc/optimization/arm/strlen.S
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../../third_party/optimized-routines/string/arm/strlen-armv6t2.S
\ No newline at end of file
diff --git a/lib/libc/optimization/asmdefs.h b/lib/libc/optimization/asmdefs.h
deleted file mode 120000
index 1cb01634a381b70b2e29c883800b990f5b700874..0000000000000000000000000000000000000000
--- a/lib/libc/optimization/asmdefs.h
+++ /dev/null
@@ -1 +0,0 @@
-../../../../../third_party/optimized-routines/string/asmdefs.h
\ No newline at end of file
diff --git a/tools/build/mk/los_config.mk b/tools/build/mk/los_config.mk
index a489709063cbe00c769e150a859f9fee39b25911..5dc501704f7716c04a07e9f121dafc1c68b6a126 100644
--- a/tools/build/mk/los_config.mk
+++ b/tools/build/mk/los_config.mk
@@ -229,10 +229,8 @@ ifeq ($(LOSCFG_LIB_LIBC), y)
     LITEOS_BASELIB  += -lc -lsec
     LITEOS_LIBC_INCLUDE   += \
         $(LITEOS_LIBSCREW_INCLUDE) \
-        -I $(LITEOSTOPDIR)/lib/libc/musl/include \
-        -I $(LITEOSTOPDIR)/lib/libc/musl/obj/include \
-        -I $(LITEOSTOPDIR)/lib/libc/musl/arch/arm \
-        -I $(LITEOSTOPDIR)/lib/libc/musl/arch/generic \
+        -I $(LITEOSTOPDIR)/lib/libc/include \
+        -I $(LITEOSTHIRDPARTY)/musl/porting/liteos_a/kernel/include \
         -I $(LITEOSTHIRDPARTY)/bounds_checking_function/include
 endif
 
@@ -585,7 +583,6 @@ LITEOS_CXXINCLUDE += \
     -I $(LITEOS_COMPILER_CXX_PATH)/c++/$(VERSION_NUM)/ext \
     -I $(LITEOS_COMPILER_CXX_PATH)/c++/$(VERSION_NUM)/backward \
     -I $(LITEOSTOPDIR)/compat/posix/include \
-    -I $(LITEOSTOPDIR)/lib/libc/musl/include \
     -I $(LITEOSTOPDIR)/fs/include \
     -I $(LITEOSTOPDIR)/kernel/include \
     $(LITEOS_LIBC_INCLUDE)
diff --git a/tools/build/mk/module.mk b/tools/build/mk/module.mk
index 5152c6a68668d46a2f30307bc017b3817b09f999..7391fe0379f827bb69caedf1b645691cd0846d7f 100644
--- a/tools/build/mk/module.mk
+++ b/tools/build/mk/module.mk
@@ -63,25 +63,12 @@ LOCAL_OBJS := $(LOCAL_COBJS) $(LOCAL_CPPOBJS) $(LOCAL_ASMOBJS) $(LOCAL_ASMOBJS2)
 
 LOCAL_CGCH := $(patsubst %.h,%.h.gch,$(LOCAL_CHS))
 LOCAL_CPPGCH := $(patsubst %.h,%.h.gch,$(LOCAL_CPPHS))
-#$(info LOCAL_SRCS = $(LOCAL_SRCS))
-#$(info LOCAL_CSRCS = $(LOCAL_CSRCS))
-#$(info LOCAL_CPPSRCS = $(LOCAL_CPPSRCS))
-#$(info LOCAL_ASMSRCS = $(LOCAL_ASMSRCS))
-#$(info LOCAL_ASMSRCS2 = $(LOCAL_ASMSRCS2))
-#$(info LOCAL_CCSRCS = $(LOCAL_CCSRCS))
-
-#$(info LOCAL_OBJS = $(LOCAL_OBJS))
-#$(info LOCAL_COBJS = $(LOCAL_COBJS))
-#$(info LOCAL_CPPOBJS = $(LOCAL_CPPOBJS))
-#$(info LOCAL_ASMOBJS = $(LOCAL_ASMOBJS))
-#$(info LOCAL_ASMOBJS2 = $(LOCAL_ASMOBJS2))
-#$(info LOCAL_CCOBJS = $(LOCAL_CCOBJS))
 
 all : $(LIB)
 
 $(LOCAL_COBJS): $(OBJOUT)/%.o: %.c
 	$(HIDE)$(OBJ_MKDIR)
-	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_INCLUDE) $(LOCAL_FLAGS) $(LOCAL_CFLAGS) -c $< -o $@
+	$(HIDE)$(CC) $(LITEOS_CFLAGS) $(LOCAL_FLAGS) $(LOCAL_CFLAGS) -c $< -o $@
 
 $(LOCAL_CPPOBJS): $(OBJOUT)/%.o: %.cpp
 	$(HIDE)$(OBJ_MKDIR)