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<netinet/in.h> - ANSI C++ forbids data member `ip_opts' with same name

From: Rocha Iran-QIR001
Subject: <netinet/in.h> - ANSI C++ forbids data member `ip_opts' with same name as enclosing class
Date: Thu, 11 Apr 2002 16:26:40 -0500

I read in the Red Hat web site that the include file netinet/in.h comes
with the glibc. I had originally sent this bug to the GCC mailing list 
but now I've decided to ask you guys for help. Would you happen to know 
if this is a bug? I've read in some web sites people suggesting to change 
the include file to fix the problem but I do not like the idea of changing
a include file unless it is coming from a good source. Any help would
be appreciated.

Iran Rocha


I have ran across a problem using GCC 2.95.3 as a cross-compiler. My code
fails to compile with g++ when I include
<netinet/in.h>. The error message is shown below:

ANSI C++ forbids data member `ip_opts' with same name as enclosing class

The compiler is apparently complaining about the char data member of the
following structure declared in bits/in.h:

/* Structure used to describe IP options for IP_OPTIONS. The `ip_dst'
   field is used for the first-hop gateway when using a source route
   (this gets put into the header proper).  */
struct ip_opts
    struct in_addr ip_dst;      /* First hop; zero without source route.  */
    char ip_opts[40];           /* Actually variable in size.  */

As the error message implies, this appears to be an ANSI C++ constrain only.
I was able to verify that by compiling
a similar sample code using gcc rather than g++. This appears to be a bug to
me and this is why I am posting it in
gcc-bugs rather than gcc-help. Is this the case? If yes, has this bug been
fixed in the latest release of GCC? If 
it hasn't been fixed, is there a safe way to get around it? If this is not a
bug, would there be a good explanation
for this problem?

Thanks in advance,
Iran Rocha 

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