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Message-id: <51782672.10509@cygwin.com>
Date: Wed, 24 Apr 2013 14:37:38 -0400
From: "Larry Hall (Cygwin)" <reply-to-list-only-lh AT cygwin DOT com>
Reply-to: cygwin AT cygwin DOT com
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To: cygwin AT cygwin DOT com
Subject: Re: Redefinition of `struct in6_addr'?
References: <CAEE3Wrm8MwsN2MMNTRGdLgJvSHPnusJN-TXZrJFL-26BtrW_ng AT mail DOT gmail DOT com> <20130424154409 DOT GX26397 AT calimero DOT vinschen DOT de> <CAEE3Wrm4iARi33g3gOqfbyJ_Jwc6phQ8xNZSQ6=Cknj-bUQ1-g AT mail DOT gmail DOT com> <CE9C056E12502146A72FD81290379E9A6095C4FA AT ENFIRHMBX1 DOT datcon DOT co DOT uk> <CAEE3Wr=cDmAKuJ5rDK0wYoW9hVYzdfTnXCvjVMUhe0qgC4kzGA AT mail DOT gmail DOT com> <20130424175107 DOT GZ26397 AT calimero DOT vinschen DOT de> <20130424175359 DOT GH5968 AT type DOT youpi DOT perso DOT aquilenet DOT fr> <20130424181248 DOT GA26397 AT calimero DOT vinschen DOT de>
In-reply-to: <20130424181248.GA26397@calimero.vinschen.de>

On 4/24/2013 2:12 PM, Corinna Vinschen wrote:
> On Apr 24 19:53, Samuel Thibault wrote:
>> Corinna Vinschen, le Wed 24 Apr 2013 19:51:07 +0200, a écrit :
>>>>> /usr/include/cygwin/in6.h:75:8: error: redefinition of ‘struct in6_addr’
>>>>> /usr/lib/gcc/i686-pc-cygwin/4.5.3/../../../../include/w32api/in6addr.h:17:16:
>>>>> note: originally defined here
>>>
>>> Don't know this file but this is a bug in config.h.  struct in6_addr
>>> is defined in a system header, so it should not be gratuitously defined
>>> in a project header, especially if the definition collides with the
>>> right one from the system header.
>>
>> Mmm, but here it's w32api definition vs cygwin definition.
>
> Maybe I didn't read it exactly, but the bottom line here is, when
> building for Cygwin, either use the POSIX network headers (preferredly),
> or use winsock.h.  Mixing them is not supported.

Yeah, though this case is a bit buried, so it's not obvious.  Also the code
is from 2008, so I expect it has suffered some bit rot over time with
respect to Cygwin.  In any case, it looks like removing iphlpapi.h from
sysdep.c solves the problem.


-- 
Larry

_____________________________________________________________________

A: Yes.
 > Q: Are you sure?
 >> A: Because it reverses the logical flow of conversation.
 >>> Q: Why is top posting annoying in email?

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