#49 Adding support for C++

Ethernet/W5100/w5100.h

@@ -40,6 +40,11 @@
 
 #ifndef	_W5100_H_
 #define	_W5100_H_
+
+#ifdef __cplusplus
+extern <EFBFBD><EFBFBD>C<EFBFBD><EFBFBD> {
+#endif
+
 #include <stdint.h>
 #include "wizchip_conf.h"
 
@@ -1850,6 +1855,10 @@ void wiz_recv_ignore(uint8_t sn, uint16_t len);
 #endif
 /// @endcond
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif //_W5100_H_