linux-kernel - [tip:perf/urgent] perf tools: Add "reject" option for parse-events.l

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Date:   Sat, 11 Nov 2017 00:13:00 -0800
From:   tip-bot for Jiri Olsa <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, acme@...nel.org, hpa@...or.com, jolsa@...hat.com,
        acme@...hat.com, markus@...ppelsdorf.de, jolsa@...nel.org,
        tglx@...utronix.de, linux-kernel@...r.kernel.org,
        andi@...stfloor.org, namhyung@...nel.org
Subject: [tip:perf/urgent] perf tools: Add "reject" option for
 parse-events.l

Commit-ID:  b6af53b7d6fa40262c16753fe2781a3e792d5e1b
Gitweb:     https://git.kernel.org/tip/b6af53b7d6fa40262c16753fe2781a3e792d5e1b
Author:     Jiri Olsa <jolsa@...hat.com>
AuthorDate: Wed, 8 Nov 2017 16:43:09 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 9 Nov 2017 10:09:03 -0300

perf tools: Add "reject" option for parse-events.l

Arnaldo reported broken builds in some distros using a newer flex
release, 2.6.4, found in Alpine Linux 3.6 and Edge, with flex not
spotting the REJECT macro:

  CC       /tmp/build/perf/util/parse-events-flex.o
  util/parse-events.l: In function 'parse_events_lex':
  /tmp/build/perf/util/parse-events-flex.c:4734:16: error: \
  'reject_used_but_not_detected' undeclared (first use in this function)

It's happening because we put the REJECT under another USER_REJECT macro
in following commit:

  9445464bb831 perf tools: Unwind properly location after REJECT

Fortunately flex provides option for force it to use REJECT, adding it
to parse-events.l.

Reported-by: Arnaldo Carvalho de Melo <acme@...nel.org>
Reported-by: Markus Trippelsdorf <markus@...ppelsdorf.de>
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Reviewed-by: Andi Kleen <andi@...stfloor.org>
Tested-by: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Fixes: 9445464bb831 ("perf tools: Unwind properly location after REJECT")
Link: http://lkml.kernel.org/n/tip-7kdont984mw12ijk7rji6b8p@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/parse-events.l | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 6680e4f..dc5f40e 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -5,6 +5,7 @@
 %option stack
 %option bison-locations
 %option yylineno
+%option reject
 
 %{
 #include <errno.h>