ifeq ($(BUILDROOT),)
$(error BUILDROOT IS NOT SET!)
endif

TARGET := x86_64-elf
KERNELMAKE := TARGET=${TARGET} $(MAKE) -C src/kernel
LIBMAKE := TARGET=${TARGET} $(MAKE) -C src/libmittos

DIST := $(BUILDROOT)/mittos.iso
SYSROOT := $(BUILDROOT)/sysroot
SYS_ITEMS := $(SYSROOT)/kernel $(SYSROOT)/usr/lib/libc.a $(SYSROOT)/usr/lib/libmittos.a

all: $(SYSROOT)/kernel $(SYS_ITEMS)

dist: $(DIST)

$(DIST): $(SYS_ITEMS)
	$(BUILDROOT)/toolchain/setup-grub.sh
	grub-mkrescue -o $@ $(SYSROOT)

kernel: $(SYSROOT)/kernel
$(SYSROOT)/kernel: $(SYSROOT)/usr/lib/libc.a $(SYSROOT)/usr/lib/libmittos.a FORCE
ifeq ($(shell make -sqC src/kernel install || echo 1), 1)
	$(KERNELMAKE) install
endif

musllib: $(SYSROOT)/usr/lib/libc.a
$(SYSROOT)/usr/lib/libc.a:
	toolchain/build-musl.sh

libmittos: $(SYSROOT)/usr/lib/libmittos.a
$(SYSROOT)/usr/lib/libmittos.a: FORCE
ifeq ($(shell make -sqC src/libmittos install || echo 1), 1)
	$(LIBMAKE) install
endif

.PHONY: all dist sysroot FORCE

clean:
	rm -rf $(DIST)
	$(KERNELMAKE) clean
	$(LIBMAKE) clean

distclean:
	$(MAKE) clean
	rm -rf $(SYSROOT)