ObjFW  Check-in [006e494026]

		AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
		;;
	esac

	AC_CHECK_HEADER(sys/socket.h, [
		AC_DEFINE(OF_HAVE_SYS_SOCKET_H, 1,
			[Whether we have sys/socket.h])
	])
	AC_CHECK_MEMBERS([struct sockaddr.sa_len], [], [], [
		#ifdef OF_HAVE_SYS_TYPES_H
		# include <sys/types.h>
		#endif
		#ifdef OF_HAVE_SYS_SOCKET_H
		# include <sys/socket.h>
		#endif
		#ifdef _WIN32
		# include <winsock2.h>
		#endif
	])
	AC_CHECK_TYPE([struct sockaddr_storage], [
		AC_DEFINE(OF_HAVE_SOCKADDR_STORAGE, 1,
			[Whether we have struct sockaddr_storage])
	], [], [
		#ifdef OF_HAVE_SYS_TYPES_H
		# include <sys/types.h>

#   endif
			}
#  endif

			[addresses addItem: &address];

next:
# ifdef _SIZEOF_ADDR_IFREQ
			buffer += _SIZEOF_ADDR_IFREQ(*current);
# else
			buffer += sizeof(struct ifreq);
#  ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
			if (current->ifr_addr.sa_len > sizeof(struct sockaddr))
				buffer += sizeof(struct ifreq) -
				    sizeof(struct sockaddr) +
				    current->ifr_addr.sa_len;
			else
#  endif
				buffer += sizeof(struct ifreq);
# endif
		}
	} @finally {
		free(ifrs);
		closesocket(sock);
	}
# endif