makefile

ARCH = armv7-a
MCPU = cortex-a8

TARGET = rvpb

CC = arm-none-eabi-gcc
AS = arm-none-eabi-as
LD = arm-none-eabi-gcc
OC = arm-none-eabi-objcopy

LINKER_SCRIPT = ./cruzeros.ld
MAP_FILE = build/cruzeros.map

ASM_SRCS = $(wildcard boot/*.S)
ASM_OBJS = $(patsubst boot/%.S, build/%.os, $(ASM_SRCS))

VPATH = boot			\
        hal/$(TARGET)	\
		lib				\
		kernel

C_SRCS  = $(notdir $(wildcard boot/*.c))
C_SRCS += $(notdir $(wildcard hal/$(TARGET)/*.c))
C_SRCS += $(notdir $(wildcard lib/*.c))
C_SRCS += $(notdir $(wildcard kernel/*.c))
C_OBJS = $(patsubst %.c, build/%.o, $(C_SRCS))

INC_DIRS  = -I include 			\
            -I hal	   			\
            -I hal/$(TARGET)	\
			-I lib				\
			-I kernel
            
CFLAGS = -c -g -std=c11
LDFLAGS = -nostartfiles -nostdlib -nodefaultlibs -static -lgcc

cruzeros = build/cruzeros.axf
cruzeros_bin = build/cruzeros.bin

.PHONY: all clean run debug gdb

all: $(cruzeros)

clean:
	@rm -fr build
	
run: $(cruzeros)
	qemu-system-arm -M realview-pb-a8 -kernel $(cruzeros) -nographic
	
debug: $(cruzeros)
	qemu-system-arm -M realview-pb-a8 -kernel $(cruzeros) -S -gdb tcp::1234,ipv4
	
gdb:
	arm-none-eabi-gdb
	
$(cruzeros): $(ASM_OBJS) $(C_OBJS) $(LINKER_SCRIPT)
	$(LD) -n -T $(LINKER_SCRIPT) -o $(cruzeros) $(ASM_OBJS) $(C_OBJS) -Wl,-Map=$(MAP_FILE) $(LDFLAGS)
	$(OC) -O binary $(cruzeros) $(cruzeros_bin)
	
build/%.os: %.S
	mkdir -p $(shell dirname $@)
	$(CC) -mcpu=$(MCPU) $(INC_DIRS) $(CFLAGS) -o $@ $<
	
build/%.o: %.c
	mkdir -p $(shell dirname $@)
	$(CC) -mcpu=$(MCPU) $(INC_DIRS) $(CFLAGS) -o $@ $<