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

[Graham Walsh]

thanks for that Larry.

I'm going to install and download the latest g++ version (v3.2.3 apparently) 
however I am not %100 confident that it will address the issue I'm 
encountering. I'm running with g++ v3.2, I doubt this issue is addressed in 
such a minor release. It seems that there's something fundamentally wrong 
with one of the packages (cygwin or gnu). I cannot understand how such a 
widely used compiler should fail to compile a simple file like <sys/types.h> 
off the bat.


I cannot say that with confidence until I download the latest gnu g++ 
compiler release. PLEASE PLEASE PLEASE let this work otherwise I'm gonna 
have to start programming using the MS socket interface API's which is what 
I expressly set out to avoid.

If anybody reads this and has a socket client/server demo with makefiles, 
could they pass them on to me. If they could let me know the versions of g++ 
and cygwin they're using to build, it would also help me eliminate 
compiler/version dependencies.



Cheers, I'll let you know how I fare.

GrahamO


>From: Larry Hall <cygwin-lh@cygwin.com>
>Reply-To: Cygwin List <cygwin@cygwin.com>
>To: "Graham Walsh" <graham_walsh50@hotmail.com>, cygwin@cygwin.com
>Subject: Re: sys/types.h fails to compile under g++
>Date: Sat, 31 Jan 2004 13:24:53 -0500
>
>WFM with 'g++ -o sock sock.cpp'.
>
>Your gcc/g++ is out of date, though I doubt that's the main problem.  See
><http://cygwin.com/problems.html> if you need to post again for help on
>this issue.
>
>Thanks,
>
>Larry
>
>
>At 09:52 AM 1/31/2004, Graham Walsh you wrote:
> >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 libsocket.so 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.
> >
> >
> >Cheers,
> >
> >
> >GrahamO
> >
> >
> >#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;
> >main()
> >{
> > 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");
> >   exit(-1);
> > }
> > 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");
> >     exit(-1);
> >
> > }
> > if(listen(fd,BACKLOG) == -1){  /* calls listen() */
> >     printf("listen() error\n");
> >     exit(-1);
> > }
> >while(1){
> > sin_size=sizeof(struct sockaddr_in);
> > if ((fd2 = accept(fd,(struct sockaddr *)&client,&sin_size))==-1){ /* 
>calls accept() */
> >   printf("accept() error\n");
> >   exit(-1);
> > }
> >
> > 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 ----> */
> >
> >_________________________________________________________________
> >Scope out the new MSN Plus Internet Software — optimizes dial-up to the 
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> >
> >
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>--
>Larry Hall                              http://www.rfk.com
>RFK Partners, Inc.                      (508) 893-9779 - RFK Office
>838 Washington Street                   (508) 893-9889 - FAX
>Holliston, MA 01746
>

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