linux-kernel - [tip:perf/core] perf scripting perl: Fix compile error with some perl5 versions

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Message-ID: <tip-d7dd112ea5cacf91ae72c0714c3b911eb6016fea@git.kernel.org>
Date:   Mon, 13 Feb 2017 22:40:08 -0800
From:   tip-bot for Wang YanQing <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     jolsa@...nel.org, acme@...hat.com, mingo@...nel.org,
        udknight@...il.com, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, hpa@...or.com
Subject: [tip:perf/core] perf scripting perl: Fix compile error with some
 perl5 versions

Commit-ID:  d7dd112ea5cacf91ae72c0714c3b911eb6016fea
Gitweb:     http://git.kernel.org/tip/d7dd112ea5cacf91ae72c0714c3b911eb6016fea
Author:     Wang YanQing <udknight@...il.com>
AuthorDate: Sun, 12 Feb 2017 10:46:55 +0800
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 13 Feb 2017 17:22:32 -0300

perf scripting perl: Fix compile error with some perl5 versions

Fix below compile error:

  CC       util/scripting-engines/trace-event-perl.o
  In file included from /usr/lib/perl5/5.22.2/i686-linux/CORE/perl.h:5673:0,
                   from util/scripting-engines/trace-event-perl.c:31:
  /usr/lib/perl5/5.22.2/i686-linux/CORE/inline.h: In function 'S__is_utf8_char_slow':
  /usr/lib/perl5/5.22.2/i686-linux/CORE/inline.h:270:5: error: nested extern declaration of 'Perl___notused' [-Werror=nested-externs]
          dTHX;   /* The function called below requires thread context */
			     ^
  cc1: all warnings being treated as errors

After digging perl5 repository, I find out that we will meet this
compile error with perl from v5.21.1 to v5.25.4

Signed-off-by: Wang YanQing <udknight@...il.com>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Link: http://lkml.kernel.org/r/20170212024655.GA15997@udknight
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/scripting-engines/Build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/scripting-engines/Build b/tools/perf/util/scripting-engines/Build
index 6516e22..82d28c6 100644
--- a/tools/perf/util/scripting-engines/Build
+++ b/tools/perf/util/scripting-engines/Build
@@ -1,6 +1,6 @@
 libperf-$(CONFIG_LIBPERL)   += trace-event-perl.o
 libperf-$(CONFIG_LIBPYTHON) += trace-event-python.o
 
-CFLAGS_trace-event-perl.o += $(PERL_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-shadow -Wno-undef -Wno-switch-default
+CFLAGS_trace-event-perl.o += $(PERL_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-shadow -Wno-nested-externs -Wno-undef -Wno-switch-default
 
 CFLAGS_trace-event-python.o += $(PYTHON_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-shadow