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From: Steven Rostedt <rostedt@goodmis.org>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Ian Rogers <irogers@google.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Namhyung Kim <namhyung@kernel.org>,
	linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-trace-users@vger.kernel.org,
	Tzvetomir Stoyanov <tz.stoyanov@gmail.com>,
	eranian@google.com, Michael Petlan <mpetlan@redhat.com>
Subject: Re: [RFC PATCH] libtraceevent: Increase libtraceevent logging when verbose
Date: Thu, 10 Jun 2021 15:59:15 -0400	[thread overview]
Message-ID: <20210610155915.20a252d3@oasis.local.home> (raw)
In-Reply-To: <YMJjMPDKo2IdCC6G@krava>

On Thu, 10 Jun 2021 21:08:32 +0200
Jiri Olsa <jolsa@redhat.com> wrote:

> Michael did the libtraceevent detection and dynamic linking support:
>   https://lore.kernel.org/linux-perf-users/20210428092023.4009-1-mpetlan@redhat.com/
> 
> I think we should have that in Fedora/RHEL rpms already, or it's on the way.
> 
> The detection code could be change to contain things we need.

Or it can also be changed to export the version too?

LIBTRACEEVENT_VERSION = $(shell pkg-config --modversion libtraceevent | perl -e '$ver=<>; @v=split /,/,$ver; printf "%d\n", $v[0] * 255 * 255 | $v[1] * 255 | $v[2];')

-DLIBTRACEFS_VERSION=$(LIBTRACEEVENT_VERSION)

Then in C have:

#define VERSION(a,b,c) ((a)*255*255|(b)*255|(c))

#if LIBTRACEEVENT_VERSION >= VERSION(1,2,3)

To test if the libtraceevent feature is available?

-- Steve

  parent reply	other threads:[~2021-06-10 19:59 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-10  6:06 Ian Rogers
2021-06-10 14:39 ` Steven Rostedt
2021-06-10 18:50   ` Ian Rogers
2021-06-10 19:32     ` Steven Rostedt
2021-06-10 19:08   ` Jiri Olsa
2021-06-10 19:47     ` Steven Rostedt
2021-06-10 19:59     ` Steven Rostedt [this message]
2021-06-10 20:47       ` Jiri Olsa

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