add 'extern "C" {}' for cplusplus in many headers

src/include/netif/bridgeif.h

@@ -42,6 +42,10 @@
 #include "lwip/err.h"
 #include "lwip/prot/ethernet.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct netif;
 
 #if (BRIDGEIF_MAX_PORTS < 0) || (BRIDGEIF_MAX_PORTS >= 64)
@@ -116,4 +120,8 @@ void*               bridgeif_fdb_init(u16_t max_fdb_entries);
 #define BRIDGEIF_WRITE_UNPROTECT(lev)
 #endif /* BRIDGEIF_PORT_NETIFS_OUTPUT_DIRECT */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* LWIP_HDR_NETIF_BRIDGEIF_H */

src/include/netif/ieee802154.h

@@ -39,6 +39,10 @@
 
 #include "lwip/opt.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifdef PACK_STRUCT_USE_INCLUDES
 #  include "arch/bpstruct.h"
 #endif
@@ -101,5 +105,8 @@ PACK_STRUCT_END
 #define IEEE_802154_FC_SRC_ADDR_MODE_SHORT     (IEEE_802154_ADDR_MODE_SHORT << 14)
 #define IEEE_802154_FC_SRC_ADDR_MODE_EXT       (IEEE_802154_ADDR_MODE_EXT << 14)
 
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* LWIP_HDR_NETIF_IEEE802154_H */