# Makefile for GRUB for diskless Linux, FreeBSD, NetBSD, and OpenBSD systems

GRUB		= grub-0.93
GRUBTGZ		= $(GRUB).tar.gz
GRUBURL		= ftp://alpha.gnu.org/gnu/grub/$(GRUBTGZ)
GRUBPATCH	= $(GRUB)-openbsd.patch
GRUBCONFIG	= --enable-diskless		\
		  --enable-eepro100		\
		  --enable-lance		\
		  --enable-ns8390		\
		  --enable-via-rhine

TARGETS		= linux.nbgrub			\
		  linux.pxegrub			\
		  freebsd.nbgrub		\
		  freebsd.pxegrub		\
		  netbsd.nbgrub			\
		  netbsd.pxegrub		\
		  openbsd.nbgrub		\
		  openbsd.pxegrub

CC		= gcc32

default: $(TARGETS)

# Fetch, unpack, and patch GRUB source code

$(GRUBTGZ):
	wget -nv $(GRUBURL)

$(GRUB): $(GRUBTGZ)
	tar xzf $(GRUBTGZ)
	patch -d $(GRUB) -p1 <../OpenBSD/$(GRUBPATCH)

# Build GRUB for Linux

linux.nbgrub: $(GRUB)
	if [ -f $(GRUB)/Makefile ]; then $(MAKE) -C $(GRUB) distclean ; fi
	cd $(GRUB) ; ./configure $(GRUBCONFIG) --enable-preset-menu=../../Linux/grub.conf
	$(MAKE) -C $(GRUB) CC=$(CC)
	cp $(GRUB)/stage2/nbgrub linux.nbgrub
	cp $(GRUB)/stage2/pxegrub linux.pxegrub
	touch *grub

# Build GRUB for FreeBSD

freebsd.nbgrub: $(GRUB)
	if [ -f $(GRUB)/Makefile ]; then $(MAKE) -C $(GRUB) distclean ; fi
	cd $(GRUB) ; ./configure $(GRUBCONFIG) --enable-preset-menu=../../FreeBSD/grub.conf
	$(MAKE) -C $(GRUB) CC=$(CC)
	cp $(GRUB)/stage2/nbgrub freebsd.nbgrub
	cp $(GRUB)/stage2/pxegrub freebsd.pxegrub
	touch *grub

# Build GRUB for NetBSD

netbsd.nbgrub: $(GRUB)
	if [ -f $(GRUB)/Makefile ]; then $(MAKE) -C $(GRUB) distclean ; fi
	cd $(GRUB) ; ./configure $(GRUBCONFIG) --enable-preset-menu=../../NetBSD/grub.conf
	$(MAKE) -C $(GRUB) CC=$(CC)
	cp $(GRUB)/stage2/nbgrub netbsd.nbgrub
	cp $(GRUB)/stage2/pxegrub netbsd.pxegrub
	touch *grub

# Build GRUB for OpenBSD

openbsd.nbgrub: $(GRUB)
	if [ -f $(GRUB)/Makefile ]; then $(MAKE) -C $(GRUB) distclean ; fi
	cd $(GRUB) ; ./configure $(GRUBCONFIG) --enable-preset-menu=../../OpenBSD/grub.conf
	$(MAKE) -C $(GRUB) CC=$(CC)
	cp $(GRUB)/stage2/nbgrub openbsd.nbgrub
	cp $(GRUB)/stage2/pxegrub openbsd.pxegrub
	touch *grub

# Install to /tftpboot

install: $(TARGETS)
	scp $(TARGETS) $(TFTPSERVER)/tftpboot

# Clean out working files

clean:
	-rm $(TARGETS)
	-rm -rf $(GRUB)

reallyclean: clean
	-rm $(GRUBTGZ)