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sys/types.h fails to compile under g++

Hiya, first time using cygwin.... I have a linker error when compiling a stock socket app. All I use is standard calls to socket, bind etc. etc.

All the symbols usually located in on unix are missing, i.e. bind, socket, etc. etc. I am at a loss as to what to link against. If anybody knows the compilation and link options I need it would help me out completely. I am assuming that the standard cygwin release provides all the libs I need to do this type of unix coding on my humble XP box. If I've missed anything, please let me know. I am using GCC v3.2 on an XP machine with the latest cygwin installation.

my goal here is simply to write unix style code with gcc on my xp box.



#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
#include <arpa/inet.h>
#include <stdlib.h>
#define PORT 3550 /* Port that will be opened */
#define BACKLOG 2 /* Number of allowed connections */
extern "C" int close(int);
extern "C" void bzero(void *, size_t);
using namespace std;
int fd, fd2; /* file descriptors */
struct sockaddr_in server; /* server's address information */
struct sockaddr_in client; /* client's address information */
int sin_size;
if ((fd=socket(AF_INET, SOCK_STREAM, 0)) == -1 )
{ /* calls socket() */
printf("socket() error\n");
server.sin_family = AF_INET;
server.sin_port = htons(PORT); /* Remember htons() from "Conversions" section? =) */
server.sin_addr.s_addr = INADDR_ANY; /* INADDR_ANY puts your IP address automatically */
// bzero(&(server.sin_zero),8); /* zero the rest of the structure */
// void *memset (void *ptr, int val, size_t len);
memset(&(server.sin_zero), 0, 8);

if(bind(fd,(struct sockaddr*)&server,sizeof(struct sockaddr))==-1){ /* calls bind() */
printf("bind() error\n");

if(listen(fd,BACKLOG) == -1){ /* calls listen() */
printf("listen() error\n");
sin_size=sizeof(struct sockaddr_in);
if ((fd2 = accept(fd,(struct sockaddr *)&client,&sin_size))==-1){ /* calls accept() */
printf("accept() error\n");

printf("You got a connection from %s\n",inet_ntoa(client.sin_addr) ); /* prints client's IP */

send(fd2,"Welcome to my server.\n",22,0); /* send to the client welcome message */

 close(fd2); /*  close fd2 */
/* <---- SOURCE CODE ENDS HERE ----> */

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