linux-kernel - [PATCH v2] perf build: Report failure for testing feature libopencsd

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Date:   Thu,  2 Sep 2021 16:18:00 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        James Clark <james.clark@....com>, mathieu.poirier@...aro.org,
        coresight@...ts.linaro.org, linux-perf-users@...r.kernel.org,
        mike.leach@...aro.org, suzuki.poulose@....com,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v2] perf build: Report failure for testing feature libopencsd

When build perf tool with passing option 'CORESIGHT=1' explicitly, if
the feature test fails for library libopencsd, the build doesn't
complain the feature failure and continue to build the tool with
disabling the CoreSight feature insteadly.

This patch changes the building behaviour, when build perf tool with the
option 'CORESIGHT=1' and detect the failure for testing feature
libopencsd, the build process will be aborted and it shows the complaint
info.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
---

Changes from v1:
Fixed a typo in the error message.

 tools/perf/Makefile.config | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 4a0d9a6defc7..5df79538486b 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -489,6 +489,8 @@ ifdef CORESIGHT
         CFLAGS += -DCS_RAW_PACKED
       endif
     endif
+  else
+    dummy := $(error Error: No libopencsd library found or the version is not up-to-date. Please install recent libopencsd to build with CORESIGHT=1)
   endif
 endif
 
-- 
2.25.1