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From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 18 Jun 2015 08:54:04 +0200
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Subject: Re: [Qemu-devel] [PATCH v2 6/6] audio: -audiodev command line option
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To: Markus Armbruster <armbru@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>, qemu-devel@nongnu.org, =?UTF-8?Q?K=C5=91v=C3=A1g=C3=B3_Zolt=C3=A1n?= <dirty.ice.hu@gmail.com>

  Hi,

> Here's how I'd add back-compat to that baseline.  audiodev becomes
> optional, but omitting it is deprecated.  If you do, you implicitly use
> the legacy backend that takes its configuration from the environment.
> The legacy backend gets created when a frontend is using it.
> 
> If you think you got a better way to do it, the person to convince is
> Gerd.

Approach makes sense to me.  Either the old config scheme is active, for
compatibility, or the new one.  Allowing to mix old+new (use -audiodev,
but don't specify the name to -device soundcard,audiodev=) is not
needed.

cheers,
  Gerd