-#ifndef _RESOLV_H_
-#define _RESOLV_H_
+#ifndef _RESOLV_H
+#define _RESOLV_H
#include <stdint.h>
#include <arpa/nameser.h>
#define RES_PRF_REPLY 0x00002000
#define RES_PRF_INIT 0x00004000
-extern struct __res_state *__res_state(void);
+struct __res_state *__res_state(void);
#define _res (*__res_state())
struct rrec;