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Date: Sat, 30 Nov 2013 11:18:33 +0100
From: John Spencer <>
Subject: Re: IPv4 and IPv6 addresses in resolv.conf

Laurent Bercot wrote:
>> OK, so how do we detect if the system "has IPv6"? I don't think it's
>> an easy question to answer, but it's not just a rhetorical question
>> either since we need to know for the AI_ADDRCONFIG flag that's not yet
>> working, so this may very well be the right way to go.
>  Is there any problem with a build-time test that opens an IPv6 socket ?
> This is what skalibs does and it's been working so far. Of course, any
> build-time test makes cross-compilation difficult, 

it also makes binaries that work on some systems, but not on others.
musl follows a philosophy of maximum portable binaries.

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