CXX			= /usr/bin/g++
CXXFLAGS	= -std=c++20 -MMD -MP -O3
SRCDIRS 	= $(wildcard */)
IFLAGS		= $(foreach dir,$(SRCDIRS), -I$(dir))
IFLAGS      += $(foreach dir,$(SRCDIRS), -I../$(dir))

OBJECT_DIR 	= ../build
LIB 		= ../libgzutil.a

HEADER 		= $(wildcard *.hpp) $(wildcard */*.hpp) 
HEADER_INST	= $($(notdir HEADER):%.hpp=$(OBJECT_DIR)/%.stamp)
SRC 		= $(wildcard *.cpp) $(wildcard */*.cpp) 
# OBJECTS 	= $(SRC:%.cpp=$(OBJECT_DIR)/%.o)
OBJECTS 	= $($(notdir SRC):%.cpp=$(OBJECT_DIR)/%.o)
OBJECT_DIRS = $(OBJECT_DIR) $(foreach dir,$(SRCDIRS), $(OBJECT_DIR)/$(dir))
DEPENDS 	= ${OBJECTS:.o=.d}

CXXFLAGS    += $(IFLAGS)

.PHONY: install debug run clean docs 
# 
# BUILDING
#
default: $(LIB)
	echo $(OBJECTS)

# with debug flags
debug: CXXFLAGS += -g +Wextra # -DDEBUG 
debug: default

$(LIB): $(OBJECT_DIRS) $(OBJECTS)
	ar -cq $(LIB) $(OBJECTS)
# include the makefiles generated by the -M flag
-include $(DEPENDS)

# rule for all ../build/*.o files
$(OBJECT_DIR)/%.o: %.cpp
	$(CXX) -c $< -o $@ $(CXXFLAGS) $(LDFLAGS) $(LDLIBS)

$(OBJECT_DIRS):
	mkdir -p $@

#
# INSTALLATION
#
install: $(LIB) $(HEADER_INST)
	install -D -m 755 $< $(DESTDIR)/usr/lib/$(subst ../,,$<)
	install -D -m 755 ../gen_enum_str.py $(DESTDIR)/usr/bin/gz-enum-str

$(OBJECT_DIR)/%.stamp: %.hpp $(OBJECT_DIR)
	install -D -m 644 $< $(DESTDIR)/usr/include/gz-util/$<
	touch $@

#
# EXTRAS
#
# remove all object and dependecy files
clean:
	-rm -r $(OBJECT_DIR)
	-rm $(LIB)

docs:
	doxygen .doxygen_config