[PATCH 3/4] cpupower: Add 'help' target to the 'debug/x86_64' subproject makefile

[Roman Storozhenko <romeusmeister@gmail.com>]

Add 'help' target, describing all user-available targets, to the
'debug/x86_64' subproject makefile.

Signed-off-by: Roman Storozhenko <romeusmeister@gmail.com>
---
 tools/power/cpupower/debug/x86_64/Makefile | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/power/cpupower/debug/x86_64/Makefile b/tools/power/cpupower/debug/x86_64/Makefile
index b1b6c43644e7..4b35b2474182 100644
--- a/tools/power/cpupower/debug/x86_64/Makefile
+++ b/tools/power/cpupower/debug/x86_64/Makefile
@@ -28,4 +28,16 @@ install:
 	$(INSTALL) $(OUTPUT)centrino-decode $(DESTDIR)${bindir}
 	$(INSTALL) $(OUTPUT)powernow-k8-decode $(DESTDIR)${bindir}
 
+help:
+	@echo  'Build targets:'
+	@echo  '  all		  - Default target. Could be omitted. Put build artifacts'
+	@echo  '                    to "O" cmdline option dir (default: current dir)'
+	@echo  '  install	  - Install previously built project files from the output'
+	@echo  '                    dir defined by "O" cmdline option (default: current dir)'
+	@echo  '                    to the install dir  defined by "DESTDIR" cmdline'
+	@echo  ''
+	@echo  'Clean targets:'
+	@echo  '  clean		  - Clean build artifacts from the dir defined by "O" cmdline'
+	@echo  '                    option (default: current dir)'
+
 .PHONY: all default clean install

-- 
2.34.1