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Re: getaddrinfo() AI_IDN feature test

From: Mike Frysinger <vapier at gentoo dot org>
To: Martin Lambers <marlam at marlam dot de>
Cc: libc-help at sourceware dot org
Date: Sun, 8 Mar 2015 09:29:14 -0400
Subject: Re: getaddrinfo() AI_IDN feature test
Authentication-results: sourceware.org; auth=none
References: <20150101080304 dot 1b4e6e9f at daffy>

On 01 Jan 2015 08:03, Martin Lambers wrote:
> I recently changed two programs to use the AI_IDN flag for
> getaddrinfo() instead of using libidn.
> 
> Users reported runtime failure (EAI_BADFLAGS) on systems where glibc
> was build without libidn support.
> 
> On these systems, AI_IDN was defined nevertheless -- is this intended
> behaviour? If so, then #ifdef AI_IDN is not enough; what is the
> recommended way to check if AI_IDN actually works?

what version of glibc exactly ?  my reading of the git history is that since 
AI_IDN was added to the header for 2.4, glibc has unconditionally supported it.
-mike

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