linux-kernel - [PATCH 15/15] perf tools: Add missing object file to the python binding linkage list

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Date:   Thu, 27 Oct 2016 18:40:55 -0200
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Wang Nan <wangnan0@...wei.com>, Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 15/15] perf tools: Add missing object file to the python binding linkage list

From: Arnaldo Carvalho de Melo <acme@...hat.com>

In ac12f6764c50 ("perf tools: Implement branch_type event parameter") we
started using the parse_branch_str() function from one of the files used
in the python binding, which caused this entry in 'perf test' to fail:

  # perf test -v python
  16: Try 'import perf' in python, checking link problems      :
  --- start ---
  test child forked, pid 16667
  Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
  ImportError: /tmp/build/perf/python/perf.so: undefined symbol:
  parse_branch_str
  test child finished with -1
  ---- end ----
  Try 'import perf' in python, checking link problems: FAILED!
  #

I must've commited some mistake when running 'perf test' to send the
pull request for the perf-core-for-mingo-20161024 tag, to have let this
regression to pass, sigh.

Just add tools/perf/util/parse-branch-options.c and switch from using
ui__warning(), that is not available in the python binding, use
pr_warning() instead, which is good enough for this case.

Now:

  # perf test python
  16: Try 'import perf' in python, checking link problems      : Ok
  #

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Fixes: ac12f6764c50 ("perf tools: Implement branch_type event parameter")
Link: http://lkml.kernel.org/n/tip-9kn1ct1cx9ppwqlmzl6z0xhs@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/parse-branch-options.c | 2 +-
 tools/perf/util/python-ext-sources     | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/parse-branch-options.c b/tools/perf/util/parse-branch-options.c
index 3634d6974300..38fd11504015 100644
--- a/tools/perf/util/parse-branch-options.c
+++ b/tools/perf/util/parse-branch-options.c
@@ -64,7 +64,7 @@ int parse_branch_str(const char *str, __u64 *mode)
 		}
 		if (!br->name) {
 			ret = -1;
-			ui__warning("unknown branch filter %s,"
+			pr_warning("unknown branch filter %s,"
 				    " check man page\n", s);
 			goto error;
 		}
diff --git a/tools/perf/util/python-ext-sources b/tools/perf/util/python-ext-sources
index b7d4f4aeee61..0546a4304347 100644
--- a/tools/perf/util/python-ext-sources
+++ b/tools/perf/util/python-ext-sources
@@ -18,6 +18,7 @@ util/thread_map.c
 util/util.c
 util/xyarray.c
 util/cgroup.c
+util/parse-branch-options.c
 util/rblist.c
 util/counts.c
 util/strlist.c
-- 
2.7.4