[PATCH 3/4] tools: Add a help target

[Borislav Petkov <bp@amd64.org>]

From: Borislav Petkov <borislav.petkov@amd.com>

... and make it the default one so that calling 'make' without arguments
in the tools/ directory gives you the possible targets to build along
with a short description of what they are.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
---
 tools/Makefile |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tools/Makefile b/tools/Makefile
index 134b3604b0b3..25566cd74937 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -1,5 +1,24 @@
 include scripts/Makefile.include
 
+help:
+	@echo 'Possible targets:'
+	@echo ''
+	@echo '  cpupower   - a tool for all things x86 CPU power'
+	@echo '  firewire   - the userspace part of nosy, an IEEE-1394 traffic sniffer'
+	@echo '  lguest     - a minimal 32-bit x86 hypervisor'
+	@echo '  perf       - Linux performance measurement and analysis tool'
+	@echo '  slub       - slabs reporting tool'
+	@echo '  turbostat  - Intel CPU idle stats and freq reporting tool'
+	@echo '  usb        - USB testing tools'
+	@echo '  virtio     - vhost test module'
+	@echo '  x86_energy_perf_policy - Intel energy policy tool'
+	@echo ''
+	@echo 'Cleaning targets:'
+	@echo ''
+	@echo '  all of the above with the "_clean" string appended cleans'
+	@echo '    the respective build directory.'
+	@echo '  clean: a summary clean target to clean _all_ folders'
+
 perf firewire lguest slub usb virtio: FORCE
 	$(QUIET_SUBDIR0)$@/ $(QUIET_SUBDIR1)
 
-- 
1.7.9.3.362.g71319