tools/power: turbostat: make Makefile a bit more capable

The turbostat Makefile is pretty simple, its output is placed in the
same directory as the source, the install rule has no concept of a
prefix or sysroot, and you can set CC to use a specific compiler but
not use the more familiar CROSS_COMPILE. By making a few minor changes
these limitations are removed while leaving the default behavior
matching what it used to be.

Example build with these changes:
make CROSS_COMPILE=i686-wrs-linux-gnu- DESTDIR=/tmp install

or from the tools directory
make CROSS_COMPILE=i686-wrs-linux-gnu- DESTDIR=/tmp turbostat_install

Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 16 insertions, 4 deletions

diff --git a/tools/power/x86/turbostat/Makefile b/tools/power/x86/turbostat/Makefile
index 51880e8467b..e48ef07156c 100644
--- a/tools/power/x86/turbostat/Makefile
+++ b/tools/power/x86/turbostat/Makefile
@@ -1,10 +1,22 @@
+CC              = $(CROSS_COMPILE)gcc
+BUILD_OUTPUT    := $(PWD)
+PREFIX          := /usr
+DESTDIR         :=
+
 turbostat : turbostat.c
 CFLAGS +=       -Wall
 CFLAGS +=       -I../../../../arch/x86/include/
 
+%: %.c
+        @mkdir -p $(BUILD_OUTPUT)
+        $(CC) $(CFLAGS) $< -o $(BUILD_OUTPUT)/$@
+
+.PHONY : clean
 clean :
-        rm -f turbostat
+        @rm -f $(BUILD_OUTPUT)/turbostat
 
-install :
-        install turbostat /usr/bin/turbostat
-        install turbostat.8 /usr/share/man/man8
+install : turbostat
+        install -d  $(DESTDIR)$(PREFIX)/bin
+        install $(BUILD_OUTPUT)/turbostat $(DESTDIR)$(PREFIX)/bin/turbostat
+        install -d  $(DESTDIR)$(PREFIX)/share/man/man8
+        install turbostat.8 $(DESTDIR)$(PREFIX)/share/man/man8