#---------------------------------------------------------------------------------
.SUFFIXES:
#---------------------------------------------------------------------------------

ifeq ($(strip $(DEVKITARM)),)
$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
endif

include $(DEVKITARM)/ds_rules

# If on a tagged commit, use just tag
ifneq ($(shell echo $(shell git tag -l --points-at HEAD) | head -c 1),)
GIT_VER := $(shell git tag -l --points-at HEAD)
else
GIT_VER := $(shell git describe --abbrev=0 --tags)-$(shell git rev-parse --short=7 HEAD)
endif

# Ensure version.h exists
ifeq (,$(wildcard include/version.h))
$(shell mkdir -p include)
$(shell touch include/version.h)
endif

# Print new version if changed
ifeq (,$(findstring $(GIT_VER), $(shell cat include/version.h)))
$(shell printf "#ifndef VERSION_HPP\n#define VERSION_HPP\n\n#define VER_NUMBER \"$(GIT_VER)\"\n\n#endif\n" > include/version.h)
endif

#---------------------------------------------------------------------------------
# TARGET is the name of the output
# BUILD is the directory where object files & intermediate files will be placed
# SOURCES is a list of directories containing source code
# INCLUDES is a list of directories containing extra header files
# DATA is a list of directories containing binary files embedded using bin2o
# GRAPHICS is a list of directories containing image files to be converted with grit
# MAXMOD_SOUNDBANK contains a directory of music and sound effect files
#---------------------------------------------------------------------------------
TARGET		:=	GodMode9i
BUILD		:=	build
SOURCES		:=	source source/graphics dldi-include ramdrive-include mbedtls
INCLUDES	:=	include dldi-include ramdrive-include source source/graphics
DATA		:=	../data
GRAPHICS	:=  ../gfx

#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
ARCH	:=	-mthumb-interwork

CFLAGS	:=	-g -Wall -O2\
 		-march=armv5te -mtune=arm946e-s -fomit-frame-pointer\
		-ffast-math \
		$(ARCH)

CFLAGS	+=	$(INCLUDE) -DARM9 -D_NO_BOOTSTUB_
CXXFLAGS	:= $(CFLAGS) -fno-exceptions -std=gnu++17

ASFLAGS	:=	-g $(ARCH)
LDFLAGS	=	-specs=../ds_arm9_hi.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)

#---------------------------------------------------------------------------------
# any extra libraries we wish to link with the project (order is important)
#---------------------------------------------------------------------------------
LIBS	:= 	-lfat -lnds9

#---------------------------------------------------------------------------------
# list of directories containing libraries, this must be the top level containing
# include and lib
#---------------------------------------------------------------------------------
LIBDIRS	:=	$(CURDIR) ../ $(LIBNDS)

#---------------------------------------------------------------------------------
# no real need to edit anything past this point unless you need to add additional
# rules for different file extensions
#---------------------------------------------------------------------------------
ifneq ($(BUILD),$(notdir $(CURDIR)))
#---------------------------------------------------------------------------------

export OUTPUT	:=	$(CURDIR)/$(TARGET)

export VPATH	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
					$(foreach dir,$(DATA),$(CURDIR)/$(dir)) \
					$(foreach dir,$(GRAPHICS),$(CURDIR)/$(dir))

export DEPSDIR	:=	$(CURDIR)/$(BUILD)

CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
BMPFILES	:=	$(foreach dir,$(GRAPHICS),$(notdir $(wildcard $(dir)/*.bmp)))
PNGFILES	:=	$(foreach dir,$(GRAPHICS),$(notdir $(wildcard $(dir)/*.png)))
SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))

#---------------------------------------------------------------------------------
# use CXX for linking C++ projects, CC for standard C
#---------------------------------------------------------------------------------
ifeq ($(strip $(CPPFILES)),)
#---------------------------------------------------------------------------------
	export LD	:=	$(CC)
#---------------------------------------------------------------------------------
else
#---------------------------------------------------------------------------------
	export LD	:=	$(CXX)
#---------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------

export OFILES	:=	$(addsuffix .o,$(BINFILES)) \
					$(BMPFILES:.bmp=.o) \
					$(PNGFILES:.png=.o) \
					$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)

export INCLUDE	:=	$(foreach dir,$(INCLUDES),-iquote $(CURDIR)/$(dir)) \
					$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
					-I$(CURDIR)/$(BUILD)

export LIBPATHS	:=	$(foreach dir,$(LIBDIRS),-L$(dir)/lib)


export OUTPUT	:=	$(CURDIR)/$(TARGET)

.PHONY: $(BUILD) clean

all : $(BUILD)

#---------------------------------------------------------------------------------
$(BUILD):
	@[ -d $@ ] || mkdir -p $@
	@make --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
#---------------------------------------------------------------------------------
clean:
	@echo clean ...
	@rm -fr $(BUILD) $(TARGET).elf $(TARGET).nds *.bin include/version.h

#---------------------------------------------------------------------------------
else

DEPENDS	:=	$(OFILES:.o=.d)

#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
$(OUTPUT).elf	:	$(OFILES)

#---------------------------------------------------------------------------------
%.bin.o	:	%.bin
#---------------------------------------------------------------------------------
	@echo $(notdir $<)
	$(bin2o)

#---------------------------------------------------------------------------------
%.frf.o	:	%.frf
#---------------------------------------------------------------------------------
	@echo $(notdir $<)
	$(bin2o)

#---------------------------------------------------------------------------------
# This rule creates assembly source files using grit
# grit takes an image file and a .grit describing how the file is to be processed
# add additional rules like this for each image extension
# you use in the graphics folders
#---------------------------------------------------------------------------------
%.s %.h	: %.bmp %.grit
#---------------------------------------------------------------------------------
	grit $< -fts -o$*

#---------------------------------------------------------------------------------
%.s %.h   : %.png %.grit
#---------------------------------------------------------------------------------
	grit $< -fts -o$*

-include $(DEPSDIR)/*.d

#---------------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------------