Makefile.simple

# Define toolchain
CROSS_COMPILE ?= aarch64-elf-
CC := $(CROSS_COMPILE)gcc
AS := $(CROSS_COMPILE)as
LD := $(CROSS_COMPILE)ld
OBJCOPY := $(CROSS_COMPILE)objcopy
SIZE := $(CROSS_COMPILE)size

# Set the architecture-specific flags
ARCH_FLAGS := -march=armv8-a

# Source directories
SRC_DIR := src/ports/simple-arm

# Compiler and linker flags
CFLAGS := $(ARCH_FLAGS) -Wall -Werror -std=c99 -nostdlib -ffreestanding -O0 -mgeneral-regs-only
ASFLAGS := $(ARCH_FLAGS)
LDFLAGS := -nostdlib -T $(SRC_DIR)/linker-simple.ld --gc-sections



# Source files
SRC_C := $(SRC_DIR)/main_simple.c $(SRC_DIR)/system_simple.c
SRC_ASM := $(SRC_DIR)/startup.S

# Build directory
BUILD_DIR := simple-build

# Object files
OBJ_C := $(SRC_C:%.c=$(BUILD_DIR)/%.o)
OBJ_ASM := $(SRC_ASM:%.S=$(BUILD_DIR)/%.o)
OBJ := $(OBJ_C) $(OBJ_ASM)

# Output binary
TARGET := $(BUILD_DIR)/firmware

.PHONY: all clean

all: $(TARGET).bin

# Create build directories
$(BUILD_DIR):
	@mkdir -p $(BUILD_DIR)
	@mkdir -p $(dir $(OBJ_C))
	@mkdir -p $(dir $(OBJ_ASM))

$(BUILD_DIR)/%.o: %.c | $(BUILD_DIR)
	$(CC) $(CFLAGS) -c $< -o $@

$(BUILD_DIR)/%.o: %.S | $(BUILD_DIR)
	$(AS) $(ASFLAGS) $< -o $@

$(TARGET).elf: $(OBJ)
	$(LD) $(LDFLAGS) -o $@ $^
	$(SIZE) $@

$(TARGET).bin: $(TARGET).elf
	$(OBJCOPY) -O binary $< $@

clean:
	rm -rf $(BUILD_DIR)