From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH RFC 2/4] build: Download and build extnernal
 blktap2.5 repo
Date: Mon, 30 Mar 2015 15:50:59 +0100
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To: Ian Campbell <ian.campbell@citrix.com>, Wei Liu <wei.liu2@citrix.com>
Cc: Dave Scott <Dave.Scott@eu.citrix.com>, Wen Congyang <wency@cn.fujitsu.com>, George Dunlap <george.dunlap@eu.citrix.com>, Jonathan Ludlam <Jonathan.Ludlam@eu.citrix.com>, xen-devel@lists.xen.org, Ian Jackson <ian.jackson@citrix.com>, Yang Hongyang <yanghy@cn.fujitsu.com>
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On 30/03/15 15:41, Ian Campbell wrote:
> On Mon, 2015-03-30 at 15:33 +0100, Wei Liu wrote:
>> On Thu, Mar 26, 2015 at 12:46:08PM +0000, George Dunlap wrote:
>>> Download and build XenServer's blktap as an external tree, similar to
>>> qemu-xen.
>>>
>>> As of this patch we just download and build it, but don't install or
>>> use it.
>>>
>>> Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
>>> ---
>>>
>>> FIXME: Directly use the XenServer github repo for now, while we're
>>> discussing things.  If we decide to take this series, we'll have to
>>> clone the tree on xenbits and remove the FIXME line.
>>>
>> IMHO we need to support --with-system-blktap= in configure in case
>> distro wants to package blktap separately. Not sure if in practice this
>> makes sense since AIUI blktap is only used by Xen.
> I think you are right, there are at least some distros which ship a
> blktap package not from Xen. e.g. Debian ship, or have in the past
> shipped, the blktap2.5 packages.
>
> blktap is a bit different to some of the other similar cases though in
> that there is a circular dependency, although George indicated last week
> that he thought that might be an easily fixed one.

I seem to recall that some bits of blktap need xen-devel (depending on
exactly what is built).

libxl will need blktap-devel, so these dependences can be resolved.

~Andrew