linux-kernel - [PATCH v3 3/5] perf: squelch warnings from perl.h to compile-pass

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Message-Id: <1373364033-7918-4-git-send-email-artagnon@gmail.com>
Date:	Tue,  9 Jul 2013 15:30:31 +0530
From:	Ramkumar Ramachandra <artagnon@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Namhyung Kim <namhyung@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH v3 3/5] perf: squelch warnings from perl.h to compile-pass

Currently, a simple

  $ make

errors out because we compile with -Werror by default, turning all
warnings into errors.  Although no warnings are emitted by our code
itself, two kinds of warnings are emitted by perl.h (perl 5.18.0):

  -Wundef and -Wswitch-default

Use #pragma statements to squelch exactly those warnings, making perf
compile-pass.

Helped-by: Namhyung Kim <namhyung@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Ramkumar Ramachandra <artagnon@...il.com>
---
 tools/perf/util/perl.h | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 tools/perf/util/perl.h

diff --git a/tools/perf/util/perl.h b/tools/perf/util/perl.h
new file mode 100644
index 0000000..862d08d
--- /dev/null
+++ b/tools/perf/util/perl.h
@@ -0,0 +1,10 @@
+#ifndef __PERF_PERL_H
+#define __PERF_PERL_H
+
+#pragma GCC diagnostic ignored "-Wundef"
+#pragma GCC diagnostic ignored "-Wswitch-default"
+#include_next <perl.h>
+#pragma GCC diagnostic error "-Wundef"
+#pragma GCC diagnostic error "-Wswitch-default"
+
+#endif
-- 
1.8.3.2.736.g869de25

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