[PATCH] Switch IDNA implementation to libidn2 [BZ #19728] [BZ #19729] [BZ #22247]

[Florian Weimer]

On 02/04/2018 03:54 AM, Rical Jasan wrote:
> On 02/02/2018 04:41 AM, Florian Weimer wrote:
>> This is the patch rebased to 2.28.  It still depends on the
>> allocate_once patch (which has been reviewed).
>>
>> I'd especially appreciate a review of the makefile/build system changes.
> 
> If the default is to build with an external libidn2 if possible,
> shouldn't there be a configure switch to build --without-libidn2 (or
> --en/disable-idn, etc.)?

There is no build or mandatory run-time dependency on libidn2.  The 
glibc implementation of AI_* merely assumes that libidn2 will not change 
ABI without changing SONAME or symbol version.  I don't think a 
configure flag is needed.

Thanks,
Florian