CURL := curl -OL
GPG := gpg

F := grub-2.04.tar.xz
srcdir := $(F:%.tar.xz=%)
dstdir := $(F:%.tar.xz=%-tools)

default:
	@echo $(SRCDIR)

$(F):
	$(CURL) https://ftp.gnu.org/gnu/grub/$(F)

$(F).sig:
	$(CURL) https://ftp.gnu.org/gnu/grub/$(F).sig

verify: $(F) $(F).sig
	$(GPG) --verify $(F).sig

build: $(F)
	tar -xf $(F)
	cd $(srcdir) && CC=clang BUILD_CC=clang TARGET_CC=clang ./configure --disable-werror --prefix=/
	make -C $(srcdir) -j6 DESTDIR=$(CURDIR)/$(dstdir) install

clean:
	rm $(F) $(F).sig