From: Alexey Zakhlestine <alx AT gs707 DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: sockets under DJGPP ... help! gxx is acting up!
Date: Sun, 19 Dec 1999 02:04:37 +0300
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Technophile wrote:

> I'm trying to teach myself sockets w/ C++, and it's rough going--mainly
> because DJGPP doesn't come with socket support already.  Now, I *do* have
> RSXNTDJ as well, which has everything I need, but when I put the following
> into my programs:
>
>   #include <sys/socket.h>
>   #include <netinet/in.h>
>   #include <sys/types.h>
>   #include <unistd.h>
>   #include <netdb.h>
>   #include <arpa/inet.h>
>
> ... I get an error message from gxx that tells me that it can't find some of
> them.  Here's what it looks like:
>
>   D:\djgpp\practice>gxx -o test.exe test0022.cc
>   test0022.cc:1: sys/socket.h: No such file or directory (ENOENT)
>   test0022.cc:5: netdb.h: No such file or directory (ENOENT)
>   test0022.cc:6: arpa/inet.h: No such file or directory (ENOENT)
>
> Well, the files are all under <..\djgpp\rsxntdj\include\*.*>, but not under
> DJGPP's default include directory (as defined in <djgpp.env>).  How can I
> get the compiler to recognize that it needs to look in RSX's dir instead of
> the default include?

You should use command like this:
D:\djgpp\practice>gxx -I..\djgpp\rsxntdj\include -o test.exe test0022.cc

>  I tried using
> #include "D:/djgpp/rsxntdj/.../whatever.h"
> so I could manually define it, but when I do that, it just gives me another
> error message from the header file proclaiming that it's just declared a
> header file twice (that being "types.h", which both DJ and RSX have in their
> respective include directories)--what a pain.

I think you should try to include only one version of "types.h"....You can use
"#ifdef" for not including it twice...
but anyway you can try using "namespaces". As far as I remember it allows you to
use functions with the same names included from different sources, when you need
functionality of both of them....

Someone correct me if I'm wrong...