linux-kernel - [PATCH v1 2/5] perf trace-event: Add libtraceevent version tools to header

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Message-Id: <20221213232651.1269909-3-irogers@google.com>
Date:   Tue, 13 Dec 2022 15:26:48 -0800
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexey Bayduraev <alexey.v.bayduraev@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Andi Kleen <ak@...ux.intel.com>,
        James Clark <james.clark@....com>,
        Sandipan Das <sandipan.das@....com>,
        German Gomez <german.gomez@....com>,
        Leo Yan <leo.yan@...aro.org>,
        Timothy Hayes <timothy.hayes@....com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Xing Zhengjun <zhengjun.xing@...ux.intel.com>,
        Kim Phillips <kim.phillips@....com>,
        Riccardo Mancini <rickyman7@...il.com>,
        Sean Christopherson <seanjc@...gle.com>,
        shaomin Deng <dengshaomin@...rlc.com>,
        Eelco Chaudron <echaudro@...hat.com>,
        Athira Jajeev <atrajeev@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        bpf@...r.kernel.org
Cc:     Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH v1 2/5] perf trace-event: Add libtraceevent version tools to header

Allow comparisons like:
\#if MAKE_LIBTRACEEVENT_VERSION(1, 3, 0) <= LIBTRACEEVENT_VERSION

Based on previously reverted:
https://lore.kernel.org/linux-perf-users/20210923001024.550263-4-irogers@google.com/

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/trace-event.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index add6c5d9531c..1fbf4c3f8809 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -6,6 +6,19 @@
 #include <stdio.h>
 #include <linux/types.h>
 
+#ifdef HAVE_LIBTRACEEVENT
+#include <traceevent/event-parse.h>
+#endif
+
+#define MAKE_LIBTRACEEVENT_VERSION(a, b, c) ((a)*255*255+(b)*255+(c))
+#ifndef LIBTRACEEVENT_VERSION
+/*
+ * If LIBTRACEEVENT_VERSION wasn't computed then set to version 1.1.0 that
+ * previously shipped with the Linux kernel tools.
+ */
+#define LIBTRACEEVENT_VERSION MAKE_LIBTRACEEVENT_VERSION(1, 1, 0)
+#endif
+
 struct evlist;
 struct machine;
 struct perf_sample;
-- 
2.39.0.314.g84b9a713c41-goog