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

include $(DEVKITARM)/ds_rules
#---------------------------------------------------------------------------------
# TARGET is the name of the output, if this ends with _mb generates a multiboot image
# 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
#---------------------------------------------------------------------------------
TARGET		:=	default_arm7
BUILD		:=	build
SOURCES		:=	gfx source data
INCLUDES	:=	include build

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

CFLAGS	:=	-g -Wall -O2\
 		-mcpu=arm7tdmi -mtune=arm7tdmi -fomit-frame-pointer\
		-ffast-math \
		$(ARCH)

CFLAGS	+=	$(INCLUDE) -DARM7

ASFLAGS	:=	-g $(ARCH)
LDFLAGS	=	-g $(ARCH) -mno-fpu -Wl,-Map,$(notdir $*).map


#---------------------------------------------------------------------------------
# any extra libraries we wish to link with the project
#---------------------------------------------------------------------------------
LIBS	:= -lnds7


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

CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
PCXFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.pcx)))
BINFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.bin)))
PALFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.pal)))
RAWFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.raw)))
MAPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.map)))

export OFILES	:=	$(MAPFILES:.map=.o) $(RAWFILES:.raw=.o) $(PALFILES:.pal=.o) $(BINFILES:.bin=.o) $(PCXFILES:.pcx=.o)\
			$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)

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

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

export DEPSDIR	:=	$(CURDIR)/build

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

.PHONY: $(BUILD) clean

#---------------------------------------------------------------------------------
$(BUILD):
	@[ -d $@ ] || mkdir -p $@
	@make --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile

#---------------------------------------------------------------------------------
clean:
	@echo clean ...
	@rm -fr $(BUILD) *.elf *.nds*


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

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

#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------

$(OUTPUT).bin	:	$(OUTPUT).elf

$(OUTPUT).elf	:	$(OFILES)


#---------------------------------------------------------------------------------
%.bin: %.elf
	@echo built ... $(notdir $@)
	@$(OBJCOPY) -O binary $< $@

#---------------------------------------------------------------------------------
%.elf:
	@echo linking binary
	@$(LD)  $(LDFLAGS) -specs=ds_arm7.specs $(OFILES) $(LIBPATHS) $(LIBS) -o $@

-include $(DEPENDS)

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