<Make> Upgraded builder

- `make clean` is no longer a valid target
- `make <project> clean` is valid target, this change is made
  to keep other build safe.
- Add new target to clean up workspace `make clean_workspace`
- Upgraded project builder to validate targets more effectively

mk/help.mk

@@ -16,7 +16,7 @@ Usage: make [<project_name>|default|...] (V=|PP=|...)\n\
 \n\
 Examples:\n\
 $$ make demo_avr \# Builds project demo_avr\n\
-$$ make clean \# Cleans the build out folder \n\
+$$ make demo_avr clean \# Cleans demo_avr build\n\
 $$ make demo_avr V=1 \# Builds demo_avr with verbose\n\
 $$ make list \# Displays all the available projects\n\
 $$ make get_all_tc \# Fetches all toolchains\n\
@@ -54,7 +54,7 @@ passed. This uses multi threaded build.\n\
 Use this for debug as it will be slow than default.\n\
 ~ clean: Cleans the project build artifacts.\n\
 ~ check: Perform static analysis.\n\
-clean: Cleans all the build artifacts.\n\
+clean_workspace: Cleans workspace to new checkout state.\n\
 list: Displays all the projects available for build.\n\
 get_all_tc: Fetches all Toolchains.\n\
 get_avr_tc: Fetches AVR Toolchain.\n\

mk/path.mk

@@ -23,5 +23,5 @@ OUT		?= $(OUT_PATH)/$(PROJECT)
 
 GET_PATH	= $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST))))
 
-./%/:
+%/:
 	mkdir -p $@

mk/project.mk

@@ -17,8 +17,8 @@ include mk/mk_helper.mk
 include mk/qemu.mk
 include mk/picotool.mk
 
-P_TARGETS	+= default cyancore check version copy_to_remote clean_remote
-T_ALLOWLIST	+= list clean all_projects clean_workspace setup_workspace
+P_TARGETS	+= default cyancore check version copy_to_remote clean_remote clean
+T_ALLOWLIST	+= list all_projects clean_workspace setup_workspace
 PROJECT_LIST	:= $(shell ls projects/ -I *.template -I *.src)
 
 .PHONY: aux_target
@@ -44,7 +44,7 @@ setup_workspace: | --install_os_pkgs $(SIZE) get_all_tc
 
 clean_workspace: clean
 	$(info < / > Cleaning up workspace ...)
-	rm -rf $(CCACHE_DIR) $(TOOLS_ROOT)
+	rm -rf $(OUT_PATH) $(CCACHE_DIR) $(TOOLS_ROOT)
 
 list:
 	$(info Available projects are :)
@@ -56,8 +56,8 @@ copy_to_remote: --cpremote
 clean_remote: --rmremote
 
 
-ifeq ($(findstring $(MAKECMDGOALS),$(T_ALLOWLIST)),)
-ifeq ($(findstring $(firstword $(MAKECMDGOALS)),$(P_TARGETS)),)
+ifeq ($(filter $(MAKECMDGOALS),$(T_ALLOWLIST)),)
+ifeq ($(filter $(firstword $(MAKECMDGOALS)),$(P_TARGETS)),)
 PROJECT		?= $(firstword $(MAKECMDGOALS))
 CMD		:= $(word 2,$(MAKECMDGOALS))
 ifeq ($(CMD),)