diff --git a/components/net/lwip-2.1/porting/include/arch/cc.h b/components/net/lwip-2.1/porting/include/arch/cc.h
index c2eebaf5a3fdeee174d3b524567b43632db69686..64e364fa8331a44bab571b461cc11e50a3267b4a 100644
--- a/components/net/lwip-2.1/porting/include/arch/cc.h
+++ b/components/net/lwip-2.1/porting/include/arch/cc.h
@@ -44,7 +44,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include "securec.h"
-#include "log.h"
 #include "memory_pool.h"
 
 #ifdef htons
@@ -62,6 +61,7 @@
 #define LWIP_DNS_API_DEFINE_ERRORS    0
 #define LWIP_DNS_API_DEFINE_FLAGS     0
 #define LWIP_DNS_API_DECLARE_STRUCTS  0
+#define LWIP_DNS_API_DECLARE_H_ERRNO  0
 
 #ifndef __SIZEOF_POINTER__
 #define __SIZEOF_POINTER__ 4   // 32 bit system
diff --git a/components/net/lwip-2.1/porting/include/lwip/netdb.h b/components/net/lwip-2.1/porting/include/lwip/netdb.h
index 7172ea843eb1ae7e75ad9499f47393e6985a3596..aea2dbc9d206d9ab22ddb7ce6d4047f03e965f3a 100644
--- a/components/net/lwip-2.1/porting/include/lwip/netdb.h
+++ b/components/net/lwip-2.1/porting/include/lwip/netdb.h
@@ -35,8 +35,4 @@
 #include <netdb.h>
 #include_next <lwip/netdb.h>
 
-#ifdef h_errno
-#undef h_errno
-#endif
-
 #endif /* _LWIP_PORTING_NETDB_H_ */
diff --git a/components/net/test/lwip_test.h b/components/net/test/lwip_test.h
index 9e190df9f2a58c7e0146261ce7b75fc1aa70ef82..9b0894aa4047480bd5b06db4cff58d460c2a12ec 100644
--- a/components/net/test/lwip_test.h
+++ b/components/net/test/lwip_test.h
@@ -36,7 +36,6 @@
 #include "lwip/sockets.h"
 #include <sys/socket.h>
 #include <arpa/inet.h>
-#include "log.h"
 #include "securec.h"
 
 #ifdef __cplusplus
diff --git a/components/net/test/net_socket_test_002.c b/components/net/test/net_socket_test_002.c
index b08efb008a34e311be120632067fef6d006e850f..2a225872e2e904145c9c71b5b416977e3fd3f07b 100644
--- a/components/net/test/net_socket_test_002.c
+++ b/components/net/test/net_socket_test_002.c
@@ -38,7 +38,6 @@
 #define TEST_CASE 120
 
 static char g_buf[BUF_SIZE + 1] = { 0 };
-extern sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stackSize, int prio);
 
 void UdpTestTask(void *p)
 {
diff --git a/components/net/test/net_socket_test_003.c b/components/net/test/net_socket_test_003.c
index 120d58224f03e13c44f6209114f94e05bab1dbce..86854d2eff86874883d2309e194be93e343e9f13 100644
--- a/components/net/test/net_socket_test_003.c
+++ b/components/net/test/net_socket_test_003.c
@@ -39,7 +39,6 @@
 #define TEST_CASE 130
 
 static char g_buf[BUF_SIZE + 1] = { 0 };
-extern sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stackSize, int prio);
 
 static int SampleTcpServer()
 {
diff --git a/components/net/test/net_socket_test_007.c b/components/net/test/net_socket_test_007.c
index 70845d1f1a911d54422f452dd4481f9fac2b3b16..bb4d6c9dceaa077ddf0771eedfa74b564396ca4a 100644
--- a/components/net/test/net_socket_test_007.c
+++ b/components/net/test/net_socket_test_007.c
@@ -40,7 +40,6 @@ static char g_buf_temp[BUF_SIZE + 1] = { 0 };
 #define SEND_UDP_COUNT 10000  // send count
 #define TEST_CASE 170
 
-extern sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stackSize, int prio);
 static void UdpTestMoreTask(void *p)
 {
     (void)p;
diff --git a/components/net/test/net_socket_test_008.c b/components/net/test/net_socket_test_008.c
index 6248d53d74ea994eb41b1f273f297748184bfeb4..f46106a87a80728ff33fc0d8cac3a93c9f2a7a98 100644
--- a/components/net/test/net_socket_test_008.c
+++ b/components/net/test/net_socket_test_008.c
@@ -41,8 +41,6 @@
 static char g_serverSendBuf[BUF_SIZE + 1] = { 0 };
 static char g_clientRecvBuf[BUF_SIZE + 1] = { 0 };
 
-extern sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stackSize, int prio);
-
 static void InitMsgBuf()
 {
     int i;
diff --git a/components/net/test/net_socket_test_009.c b/components/net/test/net_socket_test_009.c
index 282d1a10eee4762950643c2944c1225d77e956b1..95b678f423fde2b76b3ab9e208fd88a15c615a9c 100644
--- a/components/net/test/net_socket_test_009.c
+++ b/components/net/test/net_socket_test_009.c
@@ -43,8 +43,6 @@
 
 static char g_buf[BUF_SIZE + 1] = { 0 };
 
-extern sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stackSize, int prio);
-
 static int SampleTcpServer()
 {
 #if LWIP_SOCKET_SELECT
diff --git a/components/net/test/net_socket_test_010.c b/components/net/test/net_socket_test_010.c
index 9b5d8434f5e2a35d22e6c351e940d4f3afb37d21..354cbbd8f257487defbe87ab7f86a36c6d627cbb 100644
--- a/components/net/test/net_socket_test_010.c
+++ b/components/net/test/net_socket_test_010.c
@@ -43,8 +43,6 @@
 #define TIME_OUT (1000 * 10) // timeout 10s
 static char g_buf[BUF_SIZE + 1] = { 0 };
 
-extern sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stackSize, int prio);
-
 static int SampleTcpServer()
 {
 #if LWIP_SOCKET_POLL
diff --git a/components/net/test/net_socket_test_012.c b/components/net/test/net_socket_test_012.c
index 630735356db9c45ebbe746be117ed92abaab2ed8..3385f3377a1932481c539a45134e4e75aa481621 100755
--- a/components/net/test/net_socket_test_012.c
+++ b/components/net/test/net_socket_test_012.c
@@ -45,7 +45,6 @@ static int g_portClient = STACK_PORT_TCP_DUP_START;
 
 static char g_bufServer[BUF_SIZE + 1] = { 0 };
 static char g_bufClient[BUF_SIZE + 1] = { 0 };
-extern sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stackSize, int prio);
 
 static int SampleTcpServer()
 {
diff --git a/components/net/test/net_socket_test_013.c b/components/net/test/net_socket_test_013.c
index 325393ace19b35562fd661d0ffe861c57e53af6a..ccf7ba3bdb95b90b6b7efc031f732ec05bc08d3c 100755
--- a/components/net/test/net_socket_test_013.c
+++ b/components/net/test/net_socket_test_013.c
@@ -38,8 +38,6 @@
 #define STACK_PORT_TCP_LONG 2231
 #define TCP_LONG_BUF_SIZE (2 * 1024)
 
-extern sys_thread_t sys_thread_new(const char *name, lwip_thread_fn thread, void *arg, int stackSize, int prio);
-
 static int SampleTcpServer()
 {
     int sfd, lsfd;
diff --git a/kal/posix/musl_src/network/h_errno.c b/kal/posix/musl_src/network/h_errno.c
new file mode 100644
index 0000000000000000000000000000000000000000..8c7082c2d959e7b685f76ba2c5c35305736774c2
--- /dev/null
+++ b/kal/posix/musl_src/network/h_errno.c
@@ -0,0 +1,9 @@
+#include <netdb.h>
+
+#undef h_errno
+int h_errno;
+
+int *__h_errno_location(void)
+{
+    return &h_errno;
+}