extern "C" {
#endif
-#ifdef _GNU_SOURCE
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define __NEED_size_t
#endif
struct protoent *getprotobyname (const char *);
struct protoent *getprotobynumber (int);
-#ifdef _GNU_SOURCE
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
const char *hstrerror(int);
struct hostent *gethostbyname (const char *);
int gethostbyname_r(const char *, struct hostent *, char *, size_t, struct hostent **, int *);
int gethostbyaddr_r(const void *, socklen_t, int, struct hostent *, char *, size_t, struct hostent **, int *);
int getservbyport_r(int, const char *, struct servent *, char *, size_t, struct servent **);
int getservbyname_r(const char *, const char *, struct servent *, char *, size_t, struct servent **);
-extern int h_errno;
+#ifdef __GNUC__
+__attribute__((const))
+#endif
+int *__h_errno_location(void);
+#define h_errno (*__h_errno_location())
#define EAI_NODATA -5
#define EAI_ADDRFAMILY -9
#define EAI_INPROGRESS -100