# Standard housekeeping
.PHONY: 	all clean install
.SUFFIXES:
.SUFFIXES: 	.s .c .o 

all: targets

# Targets & array of sources & intermediates
SRCS :=
OBJS :=
DEPS :=

LIBS := 
BINS :=

# Iterate through directory tree
DIR := src
include $(DIR)/rules.mk
# ... (repeat)

# Generic rules
%.a: %.o
	$(ARCHIVE)

$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
	$(COMPILE)

$(OBJ_DIR)/%.o: $(SRC_DIR)/%.s
	$(ASSEMBLE)

%: %.o
	$(LINK)

$(OBJ_DIR)/%: $(SRC_DIR)/%.c
	$(COMPLNK)

.PHONY: targets
targets: $(LIBS) $(BINS)

.PHONY: clean
clean:
	rm -f $(OBJS)
	rm -f $(DEPS) 
	rm -f $(LIBS) 
	rm -f $(BINS)

.PHONY: install
install: targets
	echo "TODO"