linux-kernel - [PATCH] tools: perf: Avoid error message when building with no python installed

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Message-Id: <1438012255-26462-1-git-send-email-pawel.moll@arm.com>
Date:	Mon, 27 Jul 2015 16:50:55 +0100
From:	Pawel Moll <pawel.moll@....com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>
Cc:	linux-kernel@...r.kernel.org, Pawel Moll <pawel.moll@....com>
Subject: [PATCH] tools: perf: Avoid error message when building with no python installed

When run on a system without a python interpreter installed, the makefile
probing python will try to execute

	/bin/sh -c 'command -v -config [...]'

instead of

	/bin/sh -c 'command -v python-config [...]'

resulting in the following error message:

	sh: 1: command: Illegal option -c

Although harmless, the message can be quite confusing and hard to track.

Signed-off-by: Pawel Moll <pawel.moll@....com>
---
 tools/perf/config/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 094ddae..b4a9c29 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -150,7 +150,7 @@ ifndef NO_LIBPYTHON
   PYTHON2 := $(if $(call get-executable,python2),python2,python)
   override PYTHON := $(call get-executable-or-default,PYTHON,$(PYTHON2))
   PYTHON2_CONFIG := \
-    $(if $(call get-executable,$(PYTHON)-config),$(PYTHON)-config,python-config)
+    $(if $(PYTHON),$(if $(call get-executable,$(PYTHON)-config),$(PYTHON)-config,python-config))
   override PYTHON_CONFIG := \
     $(call get-executable-or-default,PYTHON_CONFIG,$(PYTHON2_CONFIG))
 
-- 
2.1.4

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