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tools/power turbostat: Use $(CURDIR) instead of $(PWD) and add support for O= option in Makefile

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Since commit ee0778a301
("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 does not 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 ...") and also
adds support for the O= option (see "make help" in your root of your
kernel source tree for more details).

Link: https://bugs.gentoo.org/show_bug.cgi?id=533918
Fixes: ee0778a301 ("tools/power: turbostat: make Makefile a bit more capable")
Signed-off-by: Thomas D. <whissi@whissi.de>
Cc: Mark Asselstine <mark.asselstine@windriver.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Thomas D 2015-01-05 21:37:23 +01:00 committed by Len Brown
parent a21d38c846
commit f82263c698
1 changed files with 5 additions and 1 deletions
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6
tools/power/x86/turbostat/Makefile
View file

@ -1,8 +1,12 @@
CC = $(CROSS_COMPILE)gcc
BUILD_OUTPUT := $(PWD)
BUILD_OUTPUT := $(CURDIR)
PREFIX := /usr
DESTDIR :=
ifeq ("$(origin O)", "command line")
BUILD_OUTPUT := $(O)
endif
turbostat : turbostat.c
CFLAGS += -Wall
CFLAGS += -DMSRHEADER='"../../../../arch/x86/include/uapi/asm/msr-index.h"'