!410 宏_BSD_SOURCE放在头文件中定义，其他模块使用lwip头文件时，可不用单独再定义

Merge pull request !410 from 刘建东/master

components/net/lwip-2.1/BUILD.gn

@@ -34,7 +34,6 @@ module_switch = defined(LOSCFG_NET_LWIP_SACK)
 module_name = "lwip"
 kernel_module(module_name) {
   sources = LWIP_PORTING_FILES + LWIPNOAPPSFILES - [ "$LWIPDIR/api/sockets.c" ]
-  defines = [ "_BSD_SOURCE=1" ]
   include_dirs = [ "//utils/native/lite/include" ]
 }
 

components/net/lwip-2.1/porting/include/arch/cc.h

@@ -106,4 +106,8 @@ extern void LwipLogPrintf(const char *fmt, ...);
 #define init_waitqueue_head(...)
 #define poll_check_waiters(...)
 
+#ifndef _BSD_SOURCE
+#define _BSD_SOURCE 1
+#endif
+
 #endif /* _LWIP_PORTING_CC_H_ */

components/net/lwip-2.1/porting/include/lwip/netdb.h

@@ -32,6 +32,7 @@
 #ifndef _LWIP_PORTING_NETDB_H_
 #define _LWIP_PORTING_NETDB_H_
 
+#include "lwip/arch.h"
 #include <netdb.h>
 #include_next <lwip/netdb.h>
 

components/net/lwip-2.1/porting/include/lwip/netif.h

@@ -32,6 +32,7 @@
 #ifndef _LWIP_PORTING_NETIF_H_
 #define _LWIP_PORTING_NETIF_H_
 
+#include "lwip/arch.h"
 #include <net/if.h>
 #include <netinet/ip.h>
 

components/net/lwip-2.1/porting/include/lwip/sockets.h

@@ -32,6 +32,7 @@
 #ifndef _LWIP_PORTING_SOCKETS_H_
 #define _LWIP_PORTING_SOCKETS_H_
 
+#include "lwip/arch.h"
 #include <sys/socket.h>
 #include <poll.h>
 #include <netinet/tcp.h>

components/net/lwip-2.1/porting/src/sockets_porting.c

@@ -704,7 +704,7 @@ static u8_t lwip_ioctl_impl(const struct lwip_sock *sock, long cmd, void *argp)
 {
     u8_t err = 0;
     struct ifreq *ifr = (struct ifreq *)argp;
-    bool is_ipv6 = 0;
+    u8_t is_ipv6 = 0;
 
     /* allow it only on IPv6 sockets... */
     is_ipv6 = NETCONNTYPE_ISIPV6((unsigned int)(sock->conn->type));