Re: [Qemu-devel] [RfC] using pixman in qemu for raster ops

[Anthony Liguori <anthony@codemonkey.ws>]

Gerd Hoffmann <kraxel@redhat.com> writes:

> On 09/25/12 12:48, Peter Maydell wrote:
>> On 25 September 2012 11:37, Gerd Hoffmann <kraxel@redhat.com> wrote:
>>> On 09/25/12 11:31, Peter Maydell wrote:
>>>> For me "not a standard library package on RHEL5" is a strong argument
>>>> against adding a hard dependency. (For instance, most of the compute
>>>> cluster machines here are RHEL5 and it would be pretty awkward to
>>>> deal with manually building a dependent library.)
>>>
>>> Why it is that a big deal?  Whatever is used to distribute qemu to the
>>> cluster machines (local yum repo?) can be used to distribute pixman too, no?
>> 
>> There's a big leap between "run configure, put the qemu executable
>> in some generally available directory" and "you have to first get
>> and build some third party library, install it somewhere, tell
>> configure where you put it, then build qemu, then make sure that
>> not just the qemu executable but also this third party library
>> are on all the machines". At the moment you can build qemu without
>> any non-system dependencies, and we should have a really good
>> reason for breaking that.
>
> Hmm, we could import a pixman copy into the qemu tree and use that as
> fallback if we don't find pixman installed on the system ...

We can include a pixman submodule in qemu.git and have configure try to
find a local version, if it's not available, build the embedded version.

After RHEL5 becomes ancient, we can simply remove the submodule.  Should
make everyone happy.

Regards,

Anthony Liguori

>
> cheers,
>   Gerd