linux-kernel - Re: [PATCH] perf build: Fix libbabeltrace detection

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Date:	Thu, 26 Mar 2015 10:25:21 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Jérémie Galarneau 
	<jeremie.galarneau@...icios.com>
Cc:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Jiri Olsa <jolsa@...nel.org>, linux-kernel@...r.kernel.org,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jeremie Galarneau <jgalar@...icios.com>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Tom Zanussi <tzanussi@...il.com>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH] perf build: Fix libbabeltrace detection

On Tue, Mar 10, 2015 at 10:44:00AM -0400, Jérémie Galarneau wrote:
> On Tue, Mar 10, 2015 at 10:11 AM, Jiri Olsa <jolsa@...hat.com> wrote:
> > On Tue, Mar 10, 2015 at 11:01:34AM -0300, Arnaldo Carvalho de Melo wrote:
> >> Em Tue, Mar 10, 2015 at 01:00:35PM +0100, Jiri Olsa escreveu:
> >> > On Mon, Mar 09, 2015 at 08:28:45PM -0300, Arnaldo Carvalho de Melo wrote:
> >> > > Em Mon, Mar 09, 2015 at 08:11:19PM -0300, Arnaldo Carvalho de Melo escreveu:
> >> > > > Em Mon, Mar 09, 2015 at 06:51:21PM -0300, Arnaldo Carvalho de Melo escreveu:
> >> > > [root@zoo ~]# find /opt/libbabeltrace/include/babeltrace/ -type f | xargs grep bt_ctf_stream_class_get_packet_context_type
> >> > > /opt/libbabeltrace/include/babeltrace/ctf-ir/stream-class.h:extern struct bt_ctf_field_type *bt_ctf_stream_class_get_packet_context_type(
> >>
> >> > > That seems to be included from the file included in the feature test code :-\
> >> > > Really ran out of time now...
> >>
> >> > ouch, thanks a lot for debugging.. the reason is indeed the -Werror added by:
> >> >   b49f1a4be701 perf tools: Improve feature test debuggability
> >>
> >> > following patch seems to fix this for me
> >> > ---
> >> > Following patch added -Werror for feature builds:
> >> >   b49f1a4be701 perf tools: Improve feature test debuggability
> >>
> >> > and broke libbabeltrace feature build, because it was including
> >> > wrong header and gcc couldn't find the used symbol definition.
> >>
> >> > Adding proper header and keeping the old one as it is needed
> >> > also (libbabeltrace quirk).
> >>
> >> > +++ b/tools/perf/config/feature-checks/test-libbabeltrace.c
> >> >  #include <babeltrace/ctf-writer/writer.h>
> >> > +#include <babeltrace/ctf-ir/stream-class.h>
> >>
> >> Right, that was the fix I found as well, well, I was trying to include
> >> _just_ babeltrace/ctf-ir/stream-class.h, but that is buggy in that it
> >> doesn't include the header file with the uint32_t and int64_t types:
> >
> > yep, thats the 'libbabeltrace quirk' I mentioned in the changelog ;-)
> >
> 
> Seems I missed that being discussed. Fixed in Babeltrace master as of 48d711aa2.
> 

hi,
that seems to work, but I could now load ctf trace data only in babeltrace.
I've got following error in tracecompas while trying to load the trace:

 "No trace types found to match location /tmp/ctf-data/metadata"

but I might have old version of tracecompas and Im little fuzzy
on how to upgrade to new one.. CC-ing tracecompas guys ;-)

for anyone interested, the latest perf ctf code is in:
  git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
  perf/ctf branch

thanks,
jirka
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