linux-kernel - Re: [PATCH v21 00/20] perf, tools: Add support for PMU events in JSON format

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Date:   Mon, 26 Sep 2016 10:35:33 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
        Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
        peterz@...radead.org, maddy@...ux.vnet.ibm.com,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH v21 00/20] perf, tools: Add support for PMU events in
 JSON format

On Thu, Sep 22, 2016 at 06:27:13PM +0200, Jiri Olsa wrote:
> On Thu, Sep 22, 2016 at 05:00:22PM +0200, Jiri Olsa wrote:
> > On Mon, Sep 19, 2016 at 09:28:20PM -0300, Arnaldo Carvalho de Melo wrote:
> > > Em Mon, Sep 19, 2016 at 09:02:58PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > > Em Mon, Sep 19, 2016 at 08:37:53PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > > > yeah, changing that typedef + true def to plain include <stdbool.h>
> > > > > makes it progress to the next failure, which is in cross compilation
> > > > > environments, such as using fedora 24 + the Android NDK to try to build
> > > > > a ARM android binary.
> > > 
> > > > 14 fedora:24-x-ARC-uClibc: FAIL
> > > >   GEN      /tmp/build/perf/pmu-events/pmu-events.c
> > > > /bin/sh: /tmp/build/perf/pmu-events/jevents: cannot execute binary file: Exec format error
> > > > pmu-events/Build:11: recipe for target '/tmp/build/perf/pmu-events/pmu-events.c' failed
> > > > make[2]: *** [/tmp/build/perf/pmu-events/pmu-events.c] Error 126
> > > > Makefile.perf:461: recipe for target '/tmp/build/perf/pmu-events/pmu-events-in.o' failed
> > > > make[1]: *** [/tmp/build/perf/pmu-events/pmu-events-in.o] Error 2
> > > > make[1]: *** Waiting for unfinished jobs....
> > > 
> > > Jiri, we need something similar to scripts/Makefile.host :-\
> > > 
> > > Calling it a day, perhaps, for now, we should just detect that it is a
> > > corss compile env (CROSS_COMPILE is set) and exclude all this code from
> > > the build, emitting a warning.
> > > 
> > > I left what I did at the tmp.perf/core branch of my repo at
> > > git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git.
> > 
> > as discussed on irc we will disable it for cross builds now,
> > because we dont have good solution at the moment.. it's
> > similar case as for fixdep tool:
> > 
> >     3a70fcd3a4db tools build: Fix cross compile build
> >     ...
> >     We need to add support for host side tools build, meanwhile
> >     disabling fixdep usage for cross arch builds.
> > 
> > I'll make a change to disable this for crossbuild and
> > work on common solution later
> 
> could you please give it a try with patch below?
> I tested but not with properly cross building...
> 
> also,  did you want some message during the cross build that pmu-events are not included?

ping.. is that working for you? IMO we can include this
as additional patch to the set..

thanks,
jirka