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|
.POSIX:
.SUFFIXES:
# Path to the development kit (devkitARM) and the GBA library.
DEVKITPRO := /opt/devkitpro
DEVKITBIN := $(DEVKITPRO)/devkitARM/bin
DEVKITTOOLS := $(DEVKITPRO)/tools/bin
LIBGBA_DIR := $(DEVKITPRO)/libgba
LIBGBA_SRC := $(DEVKITPRO)/libgba/include/
LIBGBA := $(LIBGBA_DIR)/lib/libgba.a
LIBGBA += $(LIBGBA_DIR)/lib/libfat.a
LIBGBA += $(LIBGBA_DIR)/lib/libmm.a
# Source code location and files to watch for changes.
SRC_DIR := src
BUILD_DIR := build
SRC_MAIN := $(SRC_DIR)/main.c
UXN_ROM := roms/dvd.rom
ROM_FILE := $(BUILD_DIR)/uxn.rom
ROM_OBJ := $(BUILD_DIR)/rom.o
ASM_FILES := $(wildcard $(SRC_DIR)/*.s)
WATCH_SRC := $(shell find $(SRC_DIR) -name *.c -or -name *.s -or -name *.h)
INC_DIRS := $(shell find $(SRC_DIR) -type d)
INC_DIRS += $(BUILD_DIR)
INC_FLAGS := $(addprefix -I,$(INC_DIRS))
INC_FLAGS += -I$(LIBGBA_SRC)
# Output library names and executables.
TARGET := uxngba
ELF := $(BUILD_DIR)/$(TARGET).elf
BIN := $(BUILD_DIR)/$(TARGET).gba
# Compiler and linker configuration.
CC := $(DEVKITBIN)/arm-none-eabi-gcc
OBJCOPY := $(DEVKITBIN)/arm-none-eabi-objcopy
ARCH := -mthumb -mthumb-interwork
SPECS := -specs=gba.specs
CONFIG :=
CFLAGS := -Wall -Wextra -pedantic -Wno-incompatible-pointer-types -Wno-unused-variable -Wno-unused-function -Wno-unused-parameter
CFLAGS += -fno-strict-aliasing
CFLAGS += -mcpu=arm7tdmi -mtune=arm7tdmi $(ARCH)
CFLAGS += $(INC_FLAGS)
CFLAGS += $(CONFIG)
LDFLAGS := $(ARCH) $(SPECS)
LDLIBS := $(LIBGBA)
RELEASE_CFLAGS := -DNDEBUG -O2
DEBUG_CFLAGS := -DDEBUG -O2 -g
.PHONY: clean run
# Setup debug/release builds.
# make clean && make <target> DEBUG=0
# make clean && make <target> DEBUG=1
DEBUG ?= 0
ifeq ($(DEBUG), 1)
CFLAGS += $(DEBUG_CFLAGS)
else
CFLAGS += $(RELEASE_CFLAGS)
endif
main: $(BUILD_DIR) $(ROM) $(BIN)
# Creates the rom object file from the given UXN_ROM.
$(ROM_FILE):
cp $(UXN_ROM) $(ROM_FILE)
$(ROM_OBJ): $(ROM_FILE)
$(OBJCOPY) --rename-section .data=.rodata \
-I binary -O elf32-littlearm $(ROM_FILE) $(ROM_OBJ)
# Strip and fix header to create final .gba file.
$(BIN): $(ELF)
$(OBJCOPY) -v -O binary $(ELF) $(BIN)
$(DEVKITTOOLS)/gbafix $(BIN)
rm $(ROM_FILE)
# Link files.
$(ELF): $(SRC_MAIN) $(WATCH_SRC) $(ROM_OBJ) | $(BUILD_DIR)
$(CC) $(CFLAGS) $(LDFLAGS) -o $(ELF) $(SRC_MAIN) $(ASM_FILES) $(LDLIBS) $(ROM_OBJ)
# Create build directory if needed.
$(BUILD_DIR):
mkdir -p $(BUILD_DIR)
# Test the output .gba in an emulator.
run: main
mgba-qt $(BIN)
# Remove build directory.
clean:
rm -rf $(BUILD_DIR)
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