CXX			= /usr/bin/g++
CXXFLAGS	= -std=c++20 -MMD -MP -Wextra #-O3: optimierungsstufe 3, -MMD .d files, -MP leeres Target, Wextra alle Warnungen
# CXXFLAGS    += -ftemplate-backtrace-limit=4 #-fno-pretty-templates
# most stuff glfw deps
LDFLAGS		= -lglfw -lvulkan -ldl -lpthread -lX11 -lXxf86vm -lXrandr -lXi -lgzutil -lfreetype
IFLAGS 		= -I/usr/include/freetype2

OBJECT_DIR 	= build
EXEC 		= vulkan_test

SRC 		= $(wildcard *.cpp)
OBJECTS 	= $($(notdir SRC):%.cpp=$(OBJECT_DIR)/%.o)
DEPENDS 	= ${OBJECTS:.o=.d}

CXXFLAGS 	+= $(IFLAGS)


default: $(EXEC)
	echo $(OBJECTS)

# TODO: REMOVE -g!
release: CXXFLAGS += -O3
release : default

# rule for the executable
$(EXEC): $(OBJECTS)
	$(CXX) $(OBJECTS) -o $@ $(CXXFLAGS) $(LDFLAGS) 
# include the makefiles generated by the -M flag
-include $(DEPENDS)

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

# if build dir does not exist, create and put stamp inside
$(OBJECT_DIR)/.dirstamp:
	mkdir -p $(OBJECT_DIR)
	touch $@

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

# make with debug flags and run afterwards
run: CXXFLAGS += -g
run: default
	$(CXX) $(OBJECTS) -o $(EXEC) $(CXXFLAGS) $(LDFLAGS) 
	./$(EXEC)

# with debug flags and run gnu debugger
gdb: CXXFLAGS += -g
gdb: default
	gdb $(EXEC) -ex "layout src"

# build pch
pch:
	$(CXX) pch.hpp -std=c++20 -O3 -g $(IFLAGS)

# remove all object and dependecy files
clean:
	# -rm -f $(OBJECT_DIR)/*.o
	# -rm -f $(OBJECT_DIR)/*.d
	-rm -r $(OBJECT_DIR)