[lttng-dev] [lttng-tools] build failure on armel (debian)

[Jon Bernard]

* Mathieu Desnoyers <mathieu.desnoyers at efficios.com> wrote:
> ----- Original Message -----
> > From: "Jon Bernard" <jbernard at debian.org>
> > To: lttng-dev at lists.lttng.org
> > Sent: Tuesday, May 6, 2014 11:14:03 AM
> > Subject: [lttng-dev] [lttng-tools] build failure on armel (debian)
> > 
> > Hey guys,
> > 
> > This bug¹ was filed recently:
> > 
> >     your package no longer builds on the armel buildds:
> >     https://buildd.debian.org/status/fetch.php?pkg=ltt-control&arch=armel&ver=2.4.1-1&stamp=1397064419
> > 
> >     >   CC       rculfhash.lo
> >     > /tmp/ccBG89vh.s: Assembler messages:
> >     > /tmp/ccBG89vh.s:1105: Error: selected processor does not support ARM
> >     > mode `dmb'
> >     > /tmp/ccBG89vh.s:1286: Error: selected processor does not support ARM
> >     > mode `dmb'
> >     > /tmp/ccBG89vh.s:3175: Error: selected processor does not support ARM
> >     > mode `dmb'
> >     > /tmp/ccBG89vh.s:3725: Error: selected processor does not support ARM
> >     > mode `dmb'
> >     > /tmp/ccBG89vh.s:3833: Error: selected processor does not support ARM
> >     > mode `dmb'
> >     > /tmp/ccBG89vh.s:3994: Error: selected processor does not support ARM
> >     > mode `dmb'
> >     > /tmp/ccBG89vh.s:4331: Error: selected processor does not support ARM
> >     > mode `dmb'
> >     > /tmp/ccBG89vh.s:5292: Error: selected processor does not support ARM
> >     > mode `dmb'
> >     > make[4]: *** [rculfhash.lo] Error 1
> > 
> > The public buildd that I can use to test this is unreachable at the
> > moment, but maybe a solution can be reached without further debug info?
> > 
> > The build machine is ARMv7, which supports dmb IIUC, so I'm a bit
> > puzzled on this one.
> > 
> > Any thoughts?
> 
> Perhaps the build itself has been changed to target ARMv6 ?
> 
> Starting with ARMv7, dmb should be there.
> 
> For ARMv6 support (and less), the Linux kernel provides
> a vDSO page implementing __kuser_memory_barrier. If you
> really need to build for ARMv6, this might be something
> to look into.
> 
> I guess we'll need more information about your build
> target.

Here is a full build log: http://sprunge.us/FIJe

Build occurred on this machine:

    Linux abel 3.13-1-armmp-lpae #4 SMP Thu Mar 27 16:56:17 UTC 2014 armv7l GNU/Linux

Is there anything else I should include?

-- 
Jon