Makefile

kernel := build/kernel.bin
iso := build/os.iso
target ?= x86_64-unknown-linux-gnu
rust_os := target/$(target)/debug/librusty_xinu.a

linker_script := src/linker.ld
grub_cfg := src/grub.cfg
assembly_source_files := $(wildcard src/*.asm)
assembly_object_files := $(patsubst src/%.asm, \
	build/%.o, $(assembly_source_files))

.PHONY: all clean run iso

all: $(kernel)

clean:
	@rm -r build

run: $(iso)
	@qemu-system -cdrom $(iso)

iso: $(iso)

$(iso): $(kernel) $(grub_cfg)
	@mkdir -p build/iso/boot/grub
	@cp $(kernel) build/iso/boot/kernel.bin
	@cp $(grub_cfg) build/iso/boot/grub
	@grub-mkrescue /usr/lib/grub/i386-pc -o $(iso) build/iso 2> /dev/null
	@rm -r build/iso

$(kernel): cargo $(rust_os) $(assembly_object_files) $(linker_script)
	@ld -n --gc-sections -T $(linker_script) -o $(kernel) $(assembly_object_files) $(rust_os)

cargo:
	@cargo build --target=$(target) --verbose

# compile assembly files
build/%.o: src/%.asm
	@mkdir -p $(shell dirname $@)
	@nasm -felf64 $< -o $@