lambdaOS/Makefile at master · VoltagedDebunked/lambdaOS · GitHub

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CC=gcc
LD=ld
AS=nasm

CFLAGS=-m32 -ffreestanding -Isrc/ -Isrc/lib/ -Isrc/core/ -fno-stack-protector -mno-mmx \
    -mno-sse -mno-sse2 -mno-red-zone -w
ECFLAGS=
LDFLAGS=-m elf_i386 -T scripts/linker.ld -nostdlib

BUILD=build
DIST=dist/iso

KERNEL_BIN=$(BUILD)/kernel.bin
ISO=LambdaOS.iso

all: iso

# --- objects ---

$(BUILD)/boot/boot.o: src/boot/boot.asm
	mkdir -p $(dir $@)
	$(AS) -f elf32 $< -o $@

SRC_CFILES := $(shell find src -name '*.c')
BUILD_OBJS := $(SRC_CFILES:src/%.c=$(BUILD)/%.o)

$(BUILD)/%.o: src/%.c
	mkdir -p $(dir $@)
	$(CC) $(CFLAGS) $(ECFLAGS) -c $< -o $@

# --- link kernel ---

$(KERNEL_BIN): $(BUILD)/boot/boot.o $(BUILD_OBJS)
	$(LD) $(LDFLAGS) $^ -o $@

# --- iso ---

iso: $(KERNEL_BIN)
	mkdir -p $(DIST)/boot/grub
	cp $(KERNEL_BIN) $(DIST)/boot/kernel.bin
	cp config/grub.cfg $(DIST)/boot/grub/grub.cfg
	grub-mkrescue -o $(ISO) $(DIST)

# --- run ---

run: iso
	qemu-system-i386 -cdrom $(ISO) -machine q35,accel=kvm -cpu host

run-gdb:
	qemu-system-i386 -cdrom $(ISO) -machine q35,accel=kvm -cpu host -s -S

# --- cleanup ---

clean:
	rm -rf build dist $(ISO)