Makefile

# Disable built-in rules
.SUFFIXES:

REGION ?= us
PAD_TO = 0x08800000

ifeq ($(REGION),us)
	TARGET = mzm_us
	GAME_TITLE = ZEROMISSIONE
	GAME_CODE = BMXE
	CPPFLAGS += -DREGION_US
	ASFLAGS += --defsym REGION_US=1
endif

ifeq ($(REGION),us_beta)
	TARGET = mzm_us_beta
	GAME_TITLE = ZEROMISSIONE
	GAME_CODE = BMXE
	CPPFLAGS += -DREGION_US -DREGION_US_BETA -DDEBUG
	ASFLAGS += --defsym REGION_US=1 --defsym REGION_US_BETA=1 --defsym DEBUG=1
	PAD_TO = 0x09000000
endif

ifeq ($(REGION),eu)
	TARGET = mzm_eu
	GAME_TITLE = ZEROMISSIONP
	GAME_CODE = BMXP
	CPPFLAGS += -DREGION_EU
	ASFLAGS += --defsym REGION_EU=1
endif

ifeq ($(REGION),eu_beta)
	TARGET = mzm_eu_beta
	GAME_TITLE = ZEROMISSIONP
	GAME_CODE = BMXP
	CPPFLAGS += -DREGION_EU -DREGION_EU_BETA -DDEBUG
	ASFLAGS += --defsym REGION_EU=1 --defsym REGION_EU_BETA=1 --defsym DEBUG=1
	PAD_TO = 0x09000000
endif

ifeq ($(REGION),jp)
	TARGET = mzm_jp
	GAME_TITLE = ZEROMISSIONJ
	GAME_CODE = BMXJ
	CPPFLAGS += -DREGION_JP
	ASFLAGS += --defsym REGION_JP=1
endif

# ifeq ($(REGION),cn)
# 	TARGET = mzm_cn
# 	GAME_TITLE = ZEROMISSIONC
# 	GAME_CODE = BMXC
# 	CPPFLAGS += -DREGION_CN
#	ASFLAGS += --defsym REGION_CN=1
# endif

ifeq ($(DEBUG),1)
	CPPFLAGS += -DDEBUG
	ASFLAGS += --defsym DEBUG=1
	TARGET := $(TARGET)_debug
endif

BASEROM := $(TARGET)_baserom.gba

TARGET := $(TARGET)_ap
PATCH = basepatch.bsdiff
SYMBOLS = extracted_symbols.json
SYMBOL_INSTRUCTIONS = extracts.json

TARGET := $(TARGET).gba

ELF = $(TARGET:.gba=.elf)
MAP = $(TARGET:.gba=.map)
SHA1FILE = $(TARGET:.gba=.sha1)
DUMPS = $(BASEROM:.gba=.dump) $(TARGET:.gba=.dump)
LD_SCRIPT = linker.ld.pp

# ROM header
MAKER_CODE = 01
GAME_REVISION = 00

# Binaries
CPP = cpp
TOOLCHAIN ?= arm-none-eabi-
AS = $(TOOLCHAIN)as
LD = $(TOOLCHAIN)ld
OBJCOPY = $(TOOLCHAIN)objcopy
OBJDUMP = $(TOOLCHAIN)objdump

CC = agbcc

DIFF = diff -u
HOSTCC = cc
MKDIR = mkdir -p
RM = rm -f
SHA1SUM = sha1sum
TAIL = tail

# Tools
GBAFIX = tools/gbafix/gbafix
PYTHON = python3
EXTRACTOR = tools/extractor.py
PREPROC = tools/preproc/preproc
BSDIFF = bsdiff
MAKE_CUSTOM_GRAPHICS = tools/make_graphics.py
SYMBOLEXTRACTOR = tools/extract_symbols.py

# Flags
ASFLAGS += -mcpu=arm7tdmi
CFLAGS = -Werror -O2 -mthumb-interwork -fhex-asm -f2003-patch
CPPFLAGS += -nostdinc -Iinclude/
PREPROCFLAGS = charmap.txt

# Objects
CSRC = $(wildcard src/**.c) $(wildcard src/**/**.c) $(wildcard src/**/**/**.c) $(wildcard src/**/**/**/**.c)
.PRECIOUS: $(CSRC:.c=.s)
ASMSRC = $(CSRC:.c=.s) $(wildcard asm/*.s) $(wildcard sound/*.s) $(wildcard sound/**/*.s) $(wildcard sound/**/**/*.s)
OBJ = $(ASMSRC:.s=.o) 

# Dynamically find agbcc path and its lib folder
AGBCC_BIN := $(shell which agbcc)
AGBCC_DIR := $(dir $(AGBCC_BIN))/
AGBCC_LIB := $(abspath $(AGBCC_DIR))

LIBS := $(AGBCC_LIB)/libgcc.a $(AGBCC_LIB)/libc.a


# Enable verbose output
ifeq ($(V),1)
	Q =
	MSG = @:
else
	Q = @
	MSG = @echo " "
endif

.PHONY: all
all: $(PATCH) $(SYMBOLS)

.PHONY: baserom
baserom: $(TARGET)

.PHONY: extract
extract:
	$(MSG) Extracting
	$Q python3 tools/extractor.py -r $(REGION)

.PHONY: clean
clean:
	$(MSG) RM roms
# Delete every gba file that doesn't end with baserom
	$Qfind -type f -name "*.gba" -a ! -name "*baserom.gba" -delete
	$(MSG) RM elf
	$Q$(RM) *.elf
	$(MSG) RM map
	$Q$(RM) *.map

	$(MSG) RM \*.dump
	$Q$(RM) $(DUMPS)
	$(MSG) RM \*.o
	$Q$(RM) $(OBJ)
	$(MSG) RM data/*.s
	$(MSG) RM src/\*\*/\*.s
	$Q$(RM) $(CSRC:.c=.s)
	$(MSG) RM $(GBAFIX)
	$Q$(RM) $(GBAFIX)
ifeq ($(DATA),1)
	$(MSG) RM data/
	$Q$(RM) -r data
endif
	$(MSG) RM linker.ld.pp
	$Q$(RM) linker.ld.pp
	$(MSG) RM $(PATCH)
	$Q$(RM) $(PATCH)
	$(MSG) RM $(SYMBOLS)
	$Q$(RM) $(SYMBOLS)

.PHONY: help
help:
	@echo 'Targets:'
	@echo '  all: create the bsdiff patch'
	@echo '  baserom: build the ROM'
	@echo '  clean: remove the patch and intermediate files'
	@echo '  	DATA=1: removes the data folder generated by the extractor'
	@echo '  help: show this message'
	@echo ''
	@echo 'Flags:'
	@echo '  V=1: enable verbose output'
	@echo '  REGION=<region>: selects the region of the ROM, possible values are "us", "eu", "jp", "cn", "us_beta", and "eu_beta"'
	@echo '  DEBUG=1: enables the debug code'

$(PATCH): $(TARGET)
	$(MSG) BSDIFF $@
	$Q$(BSDIFF) $(BASEROM) $(TARGET) $(PATCH)

$(SYMBOLS): $(SYMBOLEXTRACTOR) $(SYMBOL_INSTRUCTIONS) $(TARGET)
	$(MSG) SYMBOLEXTRACTOR $@
	$Q$(PYTHON) $(SYMBOLEXTRACTOR) $(MAP) $(SYMBOLS)

$(TARGET): $(ELF) $(GBAFIX)
	$(MSG) OBJCOPY $@
	$Q$(OBJCOPY) -O binary --gap-fill 0xff --pad-to $(PAD_TO) $< $@
	$(MSG) GBAFIX $@
	$Q$(GBAFIX) $@ -t$(GAME_TITLE) -c$(GAME_CODE) -m$(MAKER_CODE) -r$(GAME_REVISION)

$(ELF) $(MAP): $(OBJ) $(LD_SCRIPT)
	$(MSG) LD $@
	$Q$(LD) $(LDFLAGS) -n -T $(LD_SCRIPT) -Map=$(MAP) $(LIBS) -o $@

$(LD_SCRIPT): linker.ld
	$(MSG) CPP $@
	$Q$(CPP) $(CPPFLAGS) $< -o $@

%.dump: %.gba
	$(MSG) OBJDUMP $@
	$Q$(OBJDUMP) -D -bbinary -marm7tdmi -Mforce-thumb  $< | $(TAIL) -n+3 >$@
#--stop-address 0x8c71c
%.o: %.s
	$(MSG) AS $@
	$Q$(AS) $(ASFLAGS) $< -o $@

%.s: %.c
	$(MSG) CC $@
	$Q$(PREPROC) $< $(PREPROCFLAGS) | $(CPP) $(CPPFLAGS) | $(CC) -o $@ $(CFLAGS) && printf '\t.align 2, 0 @ dont insert nops\n' >> $@

src/dma.s: CFLAGS = -Werror -O1 -mthumb-interwork -fhex-asm -f2003-patch
src/dma.s: src/dma.c

src/sram/%.s: CFLAGS = -Werror -O1 -mthumb-interwork -fhex-asm -f2003-patch
src/sram/%.s: src/sram/%.c

tools/%: tools/%.c
	$(MSG) HOSTCC $@
	$Q$(HOSTCC) $< $(HOSTCFLAGS) $(HOSTCPPFLAGS) -o $@

.PHONY: us us_debug us_beta eu eu_debug eu_beta jp jp_debug
# cn cn_debug

us:
	$(MAKE) REGION=us
us_debug:
	$(MAKE) REGION=us DEBUG=1
us_beta:
	$(MAKE) REGION=us_beta

eu:
	$(MAKE) REGION=eu
eu_debug:
	$(MAKE) REGION=eu DEBUG=1
eu_beta:
	$(MAKE) REGION=eu_beta

jp:
	$(MAKE) REGION=jp
jp_debug:
	$(MAKE) REGION=jp DEBUG=1

# cn:
# 	$(MAKE) REGION=cn
# cn_debug:
# 	$(MAKE) REGION=cn DEBUG=1