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|
.POSIX:
.SUFFIXES:
# Path to the development kit (devkitARM) and the GBA library.
DEVKITPRO := /opt/devkitpro
DEVKITARM := /opt/devkitpro/devkitARM
PATH := $(DEVKITARM)/bin:$(PATH)
LIBGBA_DIR := $(DEVKITPRO)/libgba
LIBGBA_SRC := /opt/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
SRC_MAIN := $(SRC_DIR)/main.c
WATCH_SRC := $(wildcard $(SRC_DIR)/*.c)
WATCH_SRC += $(wildcard $(SRC_DIR)/*.h)
# Output library names and executables.
TARGET := first
BUILD_DIR := build
ELF := $(BUILD_DIR)/$(TARGET).elf
BIN := $(BUILD_DIR)/$(TARGET).gba
# Compiler and linker configuration.
CC := arm-none-eabi-gcc
OBJCOPY := arm-none-eabi-objcopy
ARCH := -mthumb -mthumb-interwork
SPECS := -specs=gba.specs
CFLAGS := -g -Wall -Wextra -pedantic -fno-strict-aliasing
CFLAGS += -mcpu=arm7tdmi -mtune=arm7tdmi $(ARCH)
CFLAGS += -I$(LIBGBA_SRC)
LDFLAGS := $(ARCH) $(SPECS)
LDLIBS := $(LIBGBA)
RELEASE_CFLAGS := -DNDEBUG -O2
DEBUG_CFLAGS := -DDEBUG -O2
.PHONY: clean run
# Setup debug/release builds.
# make clean && make <target> DEBUG=0
# make clean && make <target> DEBUG=1
DEBUG ?= 0
ifeq ($(DEBUG), 1)
CFLAGS += $(DEBUG_CFLAGS)
else
CFLAGS += $(RELEASE_CFLAGS)
endif
main: $(BUILD_DIR) $(BIN)
# Strip and fix header to create final .gba file.
$(BIN): $(ELF)
$(OBJCOPY) -v -O binary $(ELF) $(BIN)
gbafix $(BIN)
# Link files.
$(ELF): $(SRC_MAIN) $(WATCH_SRC)
$(CC) $(CFLAGS) $(LDFLAGS) -o $(ELF) $(SRC_MAIN) $(LDLIBS)
# 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 -r $(BUILD_DIR)
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