linux-kernel - [PATCH] perf tools: Improve Python feature detection messages

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Message-ID: <20150228083345.GB31887@gmail.com>
Date:	Sat, 28 Feb 2015 09:33:45 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	linux-kernel@...r.kernel.org, David Ahern <david.ahern@...cle.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH] perf tools: Improve Python feature detection messages


Change the Python detection message from:

  config/Makefile:566: No python-config tool was found
  config/Makefile:566: Python support will not be built

To:

  config/Makefile:565: No 'python-config' tool was found: disables Python support - please install python-devel/python-dev

It's now a standard one-line message with a package install 
suggestion, and it also uses the standard language used by other 
feature detection messages.

Signed-off-by: Ingo Molnar <mingo@...nel.org>

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index c3570b5f3bf3..44a14bd40e96 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
 disable-python = $(eval $(disable-python_code))
 define disable-python_code
   CFLAGS += -DNO_LIBPYTHON
-  $(if $(1),$(warning No $(1) was found))
-  $(warning Python support will not be built)
+  $(warning $1)
   NO_LIBPYTHON := 1
 endef
 
 ifdef NO_LIBPYTHON
-  $(call disable-python)
+  $(call disable-python,Python support disabled by user)
 else
 
   ifndef PYTHON
-    $(call disable-python,python interpreter)
+    $(call disable-python,No python interpreter was found: disables Python support - please install python-devel/python-dev)
   else
     PYTHON_WORD := $(call shell-wordify,$(PYTHON))
 
     ifndef PYTHON_CONFIG
-      $(call disable-python,python-config tool)
+      $(call disable-python,No 'python-config' tool was found: disables Python support - please install python-devel/python-dev)
     else
 
       PYTHON_CONFIG_SQ := $(call shell-sq,$(PYTHON_CONFIG))
@@ -575,7 +574,7 @@ else
       FLAGS_PYTHON_EMBED := $(PYTHON_EMBED_CCOPTS) $(PYTHON_EMBED_LDOPTS)
 
       ifneq ($(feature-libpython), 1)
-        $(call disable-python,Python.h (for Python 2.x))
+        $(call disable-python,No 'Python.h' (for Python 2.x support) was found: disables Python support - please install python-devel/python-dev)
       else
 
         ifneq ($(feature-libpython-version), 1)
--
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