MAKE       = make
MAKEFLAGS += --no-print-directory

-include Makefile.config

info:
	@echo "* Build information *"
	@echo "  ARCH  ${ARCH}"
	@echo "  MAKE  $(shell ${MAKE} --version | head -n1)"
	@echo "  CC    $(shell ${CC} --version | head -n1)"
	@echo "        ${CCFLAGS}"
	@echo "  LD    $(shell ${LD} --version | head -n1)"
	@echo "        ${LDFLAGS}"

.config: Kconfig
	@alldefconfig

Makefile.config: .config
	@cp .config Makefile.config
	@echo -e '\n# toolchain.mk' >> Makefile.config
	@cat $$(sed -nE "s/CONFIG_ARCH_(.+)=y/\1/p" .config)/toolchain.mk >> Makefile.config

.PHONY: all run clean purge
all:
	@${MAKE} ARCH=${ARCH} -C lib all
	@${MAKE} ARCH=${ARCH} -C ${ARCH} all
	@${MAKE} ARCH=${ARCH} -C devices all
	@${MAKE} ARCH=${ARCH} -C src all

run: glitch.iso
	qemu-system-i386 -cdrom glitch.iso -accel kvm

clean:
	@${MAKE} ARCH=${ARCH} -C lib clean
	@${MAKE} ARCH=${ARCH} -C ${ARCH} clean
	@${MAKE} ARCH=${ARCH} -C devices clean
	@${MAKE} ARCH=${ARCH} -C src clean

purge: clean
	rm -f lib/libk.a ${ARCH}/arch.a devices/devs.a src/kernel.a
	rm -rf glitch.elf glitch.iso isodir

lib/libk.a:
	${MAKE} ARCH=${ARCH} -C lib libk.a
i686/arch.a:
	${MAKE} ARCH=${ARCH} -C i686 arch.a
devices/devs.a:
	${MAKE} ARCH=${ARCH} -C devices devs.a
src/kernel.a:
	${MAKE} ARCH=${ARCH} -C src kernel.a

glitch.elf: ${ARCH}/arch.a src/kernel.a devices/devs.a lib/libk.a
	@echo '  LD   $@'
	@${LD} ${LDFLAGS} -T ${ARCH}/linker.ld -o $@ $^

glitch.iso: glitch.elf grub/grub.cfg
	@grub-file --is-x86-multiboot2 glitch.elf
	@mkdir -p isodir/boot/grub
	@mkdir -p isodir/boot/glitch
	@grub-script-check grub/grub.cfg
	@cp grub/grub.cfg isodir/boot/grub/grub.cfg
	@cp glitch.elf isodir/boot/glitch/glitch.elf
	@grub-mkrescue -o glitch.iso isodir