arch ?= x86_64 kernel := build/kernel-$(arch).bin iso := build/os-$(arch).iso linker_script := arch/$(arch)/boot/linker.ld grub_cfg := arch/$(arch)/boot/grub.cfg assembly_source_files := $(wildcard arch/$(arch)/boot/*.asm) assembly_object_files := $(patsubst arch/$(arch)/boot/%.asm, \ build/arch/$(arch)/%.o, $(assembly_source_files)) c_source_files := $(wildcard kernel/*.c) c_object_files := $(patsubst kernel/%.c, \ build/kernel/%.o, $(c_source_files)) .PHONY: all clean run iso all: $(kernel) clean: @rm -r build run: $(iso) @qemu-system-x86_64 -cdrom $(iso) iso: $(iso) $(iso): $(kernel) $(grub_cfg) @mkdir -p build/isofiles/boot/grub @cp $(kernel) build/isofiles/boot/kernel.bin @cp $(grub_cfg) build/isofiles/boot/grub @grub-mkrescue -o $(iso) build/isofiles 2> /dev/null @rm -r build/isofiles $(kernel): $(assembly_object_files) $(linker_script) $(c_object_files) @ld -n -T $(linker_script) -o $(kernel) $(assembly_object_files) $(c_object_files) -nostdlib -z noexecstack # compile assembly files build/arch/$(arch)/%.o: arch/$(arch)/boot/%.asm @mkdir -p $(shell dirname $@) @nasm -felf64 $< -o $@ build/kernel/%.o: kernel/%.c @mkdir -p $(shell dirname $@) @gcc -ffreestanding -mcmodel=large -mno-red-zone -mno-mmx -mno-sse -mno-sse2 -m64 -c $< -o $@