# SPDX-License-Identifier: CC0-1.0
#
# SPDX-FileContributor: Antonio Niño Díaz, 2023
export BLOCKSDS			?= /opt/blocksds/core
export BLOCKSDSEXT		?= /opt/blocksds/external

NAME			:= ClassiCube
GAME_TITLE		:= ClassiCube
GAME_SUBTITLE	:= Built with BlocksDS
GAME_AUTHOR		:= UnknownShadow200
GAME_ICON		:= misc/ds/icon.bmp

SOURCEDIRS	:= src
INCLUDEDIRS	:=
DEFINES		:= -DPLAT_NDS
LIBS		:= -ldswifi9 -lnds9 -lc
LIBDIRS		:= $(BLOCKSDS)/libs/dswifi $(BLOCKSDS)/libs/libnds


export WONDERFUL_TOOLCHAIN	?= /opt/wonderful
ARM_NONE_EABI_PATH	?= $(WONDERFUL_TOOLCHAIN)/toolchain/gcc-arm-none-eabi/bin/

# DLDI and internal SD slot of DSi
# --------------------------------

# Root folder of the SD image
SDROOT		:= sdroot
# Name of the generated image it "DSi-1.sd" for no$gba in DSi mode
SDIMAGE		:= image.bin

# Build artifacts
# ---------------

BUILDDIR	:= build-nds
ELF		:= build-nds/$(NAME).elf
DUMP		:= build-nds/$(NAME).dump
MAP		:= build-nds/$(NAME).map
ROM		:= $(NAME).nds

# Tools
# -----

PREFIX		:= $(ARM_NONE_EABI_PATH)arm-none-eabi-
CC		:= $(PREFIX)gcc
CXX		:= $(PREFIX)g++
LD		:= $(PREFIX)gcc
OBJDUMP		:= $(PREFIX)objdump
MKDIR		:= mkdir
RM		:= rm -rf

# Verbose flag
# ------------

ifeq ($(VERBOSE),1)
V		:=
else
V		:= @
endif

# Source files
# ------------

SOURCES_S	:= $(foreach dir,$(SOURCEDIRS),$(wildcard $(dir)/*.s))
SOURCES_C	:= $(foreach dir,$(SOURCEDIRS),$(wildcard $(dir)/*.c))

# Compiler and linker flags
# -------------------------

ARCH		:= -mthumb -mcpu=arm946e-s+nofp

SPECS		:= $(BLOCKSDS)/sys/crts/ds_arm9.specs

WARNFLAGS	:= -Wall

INCLUDEFLAGS	:= $(foreach path,$(INCLUDEDIRS),-I$(path)) \
		   $(foreach path,$(LIBDIRS),-I$(path)/include)

LIBDIRSFLAGS	:= $(foreach path,$(LIBDIRS),-L$(path)/lib)

ASFLAGS		+= -x assembler-with-cpp $(DEFINES) $(INCLUDEFLAGS) \
		   $(ARCH) -ffunction-sections -fdata-sections \
		   -specs=$(SPECS)

CFLAGS		+= -std=gnu17 $(WARNFLAGS) $(DEFINES) $(INCLUDEFLAGS) \
		   $(ARCH) -O2 -ffunction-sections -fdata-sections \
		   -specs=$(SPECS)

LDFLAGS		:= $(ARCH) $(LIBDIRSFLAGS) -Wl,-Map,$(MAP) $(DEFINES) \
		   -Wl,--start-group $(LIBS) -Wl,--end-group -specs=$(SPECS)

# Intermediate build files
# ------------------------
OBJS	:= $(addsuffix .o,$(addprefix $(BUILDDIR)/,$(SOURCES_S))) \
		   $(addsuffix .o,$(addprefix $(BUILDDIR)/,$(SOURCES_C)))

DEPS		:= $(OBJS:.o=.d)

# Targets
# -------

.PHONY: all clean dump dldipatch sdimage

all: $(ROM)

# Combine the title strings
ifeq ($(strip $(GAME_SUBTITLE)),)
    GAME_FULL_TITLE := $(GAME_TITLE);$(GAME_AUTHOR)
else
    GAME_FULL_TITLE := $(GAME_TITLE);$(GAME_SUBTITLE);$(GAME_AUTHOR)
endif

$(ROM): $(ELF)
	@echo "  NDSTOOL $@"
	$(V)$(BLOCKSDS)/tools/ndstool/ndstool -c $@ \
		-7 $(BLOCKSDS)/sys/default_arm7/arm7.elf -9 $(ELF) \
		-b $(GAME_ICON) "$(GAME_FULL_TITLE)" \
		$(NDSTOOL_ARGS)

$(ELF): $(OBJS)
	@echo "  LD      $@"
	$(V)$(LD) -o $@ $(OBJS) $(LDFLAGS)

$(DUMP): $(ELF)
	@echo "  OBJDUMP   $@"
	$(V)$(OBJDUMP) -h -C -S $< > $@

dump: $(DUMP)

clean:
	@echo "  CLEAN"
	$(V)$(RM) $(ROM) $(DUMP) build $(SDIMAGE)

sdimage:
	@echo "  MKFATIMG $(SDIMAGE) $(SDROOT)"
	$(V)$(BLOCKSDS)/tools/mkfatimg/mkfatimg -t $(SDROOT) $(SDIMAGE)

dldipatch: $(ROM)
	@echo "  DLDIPATCH $(ROM)"
	$(V)$(BLOCKSDS)/tools/dldipatch/dldipatch patch \
		$(BLOCKSDS)/sys/dldi_r4/r4tf.dldi $(ROM)

# Rules
# -----

$(BUILDDIR)/%.s.o : %.s
	@echo "  AS      $<"
	@$(MKDIR) -p $(@D)
	$(V)$(CC) $(ASFLAGS) -MMD -MP -c -o $@ $<

$(BUILDDIR)/%.c.o : %.c
	@echo "  CC      $<"
	@$(MKDIR) -p $(@D)
	$(V)$(CC) $(CFLAGS) -MMD -MP -c -o $@ $<

$(BUILDDIR)/%.arm.c.o : %.arm.c
	@echo "  CC      $<"
	@$(MKDIR) -p $(@D)
	$(V)$(CC) $(CFLAGS) -MMD -MP -marm -mlong-calls -c -o $@ $<

# Include dependency files if they exist
# --------------------------------------

-include $(DEPS)