[libvirt] RPM spec file patch

[Eric Blake]

On 11/16/2011 11:19 PM, Chris Picton wrote:
> On Wed, 2011-11-16 at 15:31 -0700, Eric Blake wrote:
>> On 11/15/2011 11:42 PM, Chris Picton wrote:
>>> Hi
>>>
>>> Please accept the following patch to the rpm spec file.
> 
>>
>> Thanks for the report.  However, I'm not yet quite convinced that your
>> proposed patch is the best approach.

I meant to revisit this in time for 0.9.8, but obviously slipped on that
front.  Oh well, it's now on my list for 0.9.9.

> The following may be a better way of expressing the dependencies
> 1) set sane defaults for variables near the top
> %define with_openvz        0%{!?_without_openvz:%{server_drivers}}
> 
> 2) override these with platform specific values later on (but taking
> cognisance of the user supplied options
> 
> %if 0%{?rhel}
> %define with_openvz 0%{?_with_openvz:1}
> ...
> %endif
> 
> This is already used in some cases where certain features are turned on
> on specific platforms:
> 
> %if 0%{?fedora} >= 13 || 0%{?rhel} >= 6
> %define with_dtrace 0%{!?_without_dtrace:1}
> %endif
> 
> So the bulk of the changes would be updating the spec file to replace
> %define with_xxx 0
> 
> with
> 
> %define with_xxx 0{?_with_xxx:1}

Yes, that looks like a reasonable approach.

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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