linux-kernel - [PATCH] tools/power: turbostat: Use $(CURDIR) instead of $(PWD) in Makefile

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Date:	Sun,  4 Jan 2015 18:52:43 +0100
From:	Thomas D <whissi@...ssi.de>
To:	linux-kernel@...r.kernel.org
Cc:	Thomas D <whissi@...ssi.de>,
	Mark Asselstine <mark.asselstine@...driver.com>,
	Len Brown <len.brown@...el.com>
Subject: [PATCH] tools/power: turbostat: Use $(CURDIR) instead of $(PWD) in Makefile

Since commit ee0778a30153 ("tools/power: turbostat: make Makefile a bit
more capable") turbostat’s Makefile is using

  [...]
  BUILD_OUTPUT    := $(PWD)
  [...]

which obviously causes trouble when building "turbostat" with

  make -C /usr/src/linux/tools/power/x86/turbostat ARCH=x86 turbostat

because GNU make doesn’t update nor guarantee that $PWD is set.

This patch changes the Makefile to use $CURDIR instead, which GNU make
guarantees to set and update (i.e. when using "make –C ...").

Link: https://bugs.gentoo.org/show_bug.cgi?id=533918
Fixes: ee0778a30153 ("tools/power: turbostat: make Makefile a bit more capable")
Signed-off-by: Thomas D. <whissi@...ssi.de>
Cc: Mark Asselstine <mark.asselstine@...driver.com>
Cc: Len Brown <len.brown@...el.com>
---
 tools/power/x86/turbostat/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/power/x86/turbostat/Makefile b/tools/power/x86/turbostat/Makefile
index d1b3a36..6dd4cad 100644
--- a/tools/power/x86/turbostat/Makefile
+++ b/tools/power/x86/turbostat/Makefile
@@ -1,5 +1,5 @@
 CC		= $(CROSS_COMPILE)gcc
-BUILD_OUTPUT	:= $(PWD)
+BUILD_OUTPUT	:= $(CURDIR)
 PREFIX		:= /usr
 DESTDIR		:=
 
-- 
2.2.1

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