[libvirt] build issue due to '-Werror=cast-align' on ARM (armhf) [was: Re: [Xen-devel] [libvirt test] 63528: regressions - FAIL]

[Dario Faggioli]

Hello,

The Xen Project's automated test suite is failing at running its
libvirt tests for a few time, like this:

On Wed, 2015-11-04 at 09:04 +0000, osstest service owner wrote:
> flight 63528 libvirt real [real]
> http://logs.test-lab.xenproject.org/osstest/logs/63528/
> 
> Regressions :-(
> 
> Tests which did not succeed and are blocking,
> including tests which could not be run:
>  build-armhf-libvirt           5 libvirt-build             fail REGR. vs. 63340
> 
More specifically (from a more recent run):

  CC     util/libvirt_util_la-virnetdevmacvlan.lo
util/virnetdev.c: In function 'virNetDevParseDadStatus':
util/virnetdev.c:1319:188: error: cast increases required alignment of target type [-Werror=cast-align]
util/virnetdev.c:1332:41: error: cast increases required alignment of target type [-Werror=cast-align]
util/virnetdev.c:1334:92: error: cast increases required alignment of target type [-Werror=cast-align]
cc1: all warnings being treated as errors
make[3]: *** [util/libvirt_util_la-virnetdev.lo] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory `/home/osstest/build.64130.build-armhf-libvirt/libvirt/src'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/osstest/build.64130.build-armhf-libvirt/libvirt/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/osstest/build.64130.build-armhf-libvirt/libvirt'
make: *** [all] Error 2

The changeset being tested last, as of now, and still failing, is:
db92aee2b477355759351889e37a365379b43bf6

Full logs available at the following links:
http://logs.test-lab.xenproject.org/osstest/logs/64130/build-armhf-libvirt/info.html
http://logs.test-lab.xenproject.org/osstest/logs/64130/build-armhf-libvirt/5.ts-libvirt-build.log

Right now, I don't have an ARM cross build environment handy to try to
reproduce and attempt a fix, so I figured I at least was reporting it
here.

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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