linux-kernel - [PATCH 09/12] perf tools: Convert to LIBPYTHON

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Date:	Fri, 28 Sep 2012 18:32:05 +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 09/12] perf tools: Convert to LIBPYTHON_SUPPORT

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

For building perf without python scripting, we can set NO_LIBPYTHON=1
as a argument of make.  It then defines NO_LIBPYTHON 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.
Also add _SUPPORT suffix for consistency.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/Makefile                     |  2 +-
 tools/perf/builtin-script.c             |  2 +-
 tools/perf/util/trace-event-scripting.c | 10 +++++-----
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 50d4e09a4eb4..45f8920bab2b 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -624,7 +624,6 @@ endif
 
 disable-python = $(eval $(disable-python_code))
 define disable-python_code
-  BASIC_CFLAGS += -DNO_LIBPYTHON
   $(if $(1),$(warning No $(1) was found))
   $(warning Python support won't be built)
 endef
@@ -684,6 +683,7 @@ else
           $(warning $(and ,))
           $(error   $(and ,))
         else
+          BASIC_CFLAGS += -DLIBPYTHON_SUPPORT
           ALL_LDFLAGS += $(PYTHON_EMBED_LDFLAGS)
           EXTLIBS += $(PYTHON_EMBED_LIBADD)
           LIB_OBJS += $(OUTPUT)util/scripting-engines/trace-event-python.o
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index fcd5a68337e8..141c62f9ae73 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -1061,7 +1061,7 @@ int find_scripts(char **scripts_array, char **scripts_path_array)
 		if (strstr(lang_path, "perl"))
 			continue;
 #endif
-#ifdef NO_LIBPYTHON
+#ifndef LIBPYTHON_SUPPORT
 		if (strstr(lang_path, "python"))
 			continue;
 #endif
diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-event-scripting.c
index e50040bffd67..625f5a3ac5bf 100644
--- a/tools/perf/util/trace-event-scripting.c
+++ b/tools/perf/util/trace-event-scripting.c
@@ -93,17 +93,17 @@ static void register_python_scripting(struct scripting_ops *scripting_ops)
 	scripting_context = malloc(sizeof(struct scripting_context));
 }
 
-#ifdef NO_LIBPYTHON
+#ifdef LIBPYTHON_SUPPORT
+extern struct scripting_ops python_scripting_ops;
+
 void setup_python_scripting(void)
 {
-	register_python_scripting(&python_scripting_unsupported_ops);
+	register_python_scripting(&python_scripting_ops);
 }
 #else
-extern struct scripting_ops python_scripting_ops;
-
 void setup_python_scripting(void)
 {
-	register_python_scripting(&python_scripting_ops);
+	register_python_scripting(&python_scripting_unsupported_ops);
 }
 #endif
 
-- 
1.7.11.4

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