linux-kernel - [PATCH 05/12] perf tools: Convert to LIBAUDIT

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Message-Id: <1348824728-14025-6-git-send-email-namhyung@kernel.org>
Date:	Fri, 28 Sep 2012 18:32:01 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>
Subject: [PATCH 05/12] perf tools: Convert to LIBAUDIT_SUPPORT

From: Namhyung Kim <namhyung.kim@....com>

For building perf without libaudit, we can set NO_LIBAUDIT=1 as a
argument of make.  It then defines NO_LIBAUDIT_SUPPORT macro for C
code to do the proper handling.  However it usually used in a negative
semantics - e.g. #ifndef - so we saw double negations which can be
misleading.  Convert it to a positive form to make it more readable.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/Makefile | 6 ++----
 tools/perf/perf.c   | 2 +-
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 676302441e14..99b2bb371bcd 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -543,14 +543,12 @@ ifndef NO_LIBUNWIND
 	LIB_OBJS += $(OUTPUT)util/unwind.o
 endif
 
-ifdef NO_LIBAUDIT
-	BASIC_CFLAGS += -DNO_LIBAUDIT_SUPPORT
-else
+ifndef NO_LIBAUDIT
 	FLAGS_LIBAUDIT = $(ALL_CFLAGS) $(ALL_LDFLAGS) -laudit
 	ifneq ($(call try-cc,$(SOURCE_LIBAUDIT),$(FLAGS_LIBAUDIT)),y)
 		msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
-		BASIC_CFLAGS += -DNO_LIBAUDIT_SUPPORT
 	else
+		BASIC_CFLAGS += -DLIBAUDIT_SUPPORT
 		BUILTIN_OBJS += $(OUTPUT)builtin-trace.o
 		EXTLIBS += -laudit
 	endif
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index dacae4b8bcb4..6d50eb0b4251 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -55,7 +55,7 @@ static struct cmd_struct commands[] = {
 	{ "lock",	cmd_lock,	0 },
 	{ "kvm",	cmd_kvm,	0 },
 	{ "test",	cmd_test,	0 },
-#ifndef NO_LIBAUDIT_SUPPORT
+#ifdef LIBAUDIT_SUPPORT
 	{ "trace",	cmd_trace,	0 },
 #endif
 	{ "inject",	cmd_inject,	0 },
-- 
1.7.11.4

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