#
# Copyright (c) 2000, 2001 The University of Utah and the Flux Group.
# 
# This file is part of the OSKit Linux Boot Loader, which is free software,
# also known as "open source;" you can redistribute it and/or modify it under
# the terms of the GNU General Public License (GPL), version 2, as published
# by the Free Software Foundation (FSF).
# 
# The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GPL for more details.  You should have
# received a copy of the GPL along with the OSKit; see the file COPYING.  If
# not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
#

ifndef _boot_bsd_makerules_
_boot_bsd_makerules_ = yes

# This is where the boot program gets linked to and loaded at.
PXE_LINK_ADDR = 0x7c00

TARGETS = pxeboot pxeboot.gdb
CLEAN_FILES += $(TARGETS)

# Having DEBUG defined does bad things for some of this code.
DEFINES := $(filter-out -DDEBUG,$(DEFINES))
DEFINES += -DOSKIT

# force pxeboot and booted kernels to use 115200-baud serial console
DEFINES += -DFORCESERIALCONSOLE

# Where to look for src files.
SRCDIRS += $(OSKIT_SRCDIR)/boot/pxe $(OSKIT_SRCDIR)/boot 

# Libraries we need to link with
LIBS = -loskit_exec -loskit_kern -loskit_c -loskit_lmm 
DEPENDLIBS := $(patsubst -l%,$(OBJDIR)/lib/lib%.a,$(LIBS))

INCDIRS += $(OSKIT_SRCDIR)/oskit/c $(OSKIT_SRCDIR)/boot

# We need this before including the generic rules so it
# doesn't get in there twice.
OBJFILES += version.o

all: $(TARGETS)
install: $(INSTALL_TARGETS)
prepare:: version.c

# Include the makefile containing the generic rules.
# This must come here since it depends on SRCDIRS and sets OBJFILES.
include $(OSKIT_SRCDIR)/GNUmakerules

# This is for version.c dependency, so it gets rebuilt
DEPS = $(OBJDIR)/lib/multiboot.o $(OBJFILES) $(DEPENDLIBS)

# Make sure the boot sector and setup header come first.
OBJFILES :=	crt0.o \
		$(filter-out crt0.o,$(OBJFILES))

crt0.o: crt0.S 
	$(OSKIT_QUIET_MAKE_INFORM) "Assembling $<"
	$(CC) -c -o $@ $(OSKIT_ASFLAGS) $(ASFLAGS) -MD $<


pxeboot: $(OBJFILES) $(DEPENDLIBS)
	$(LD) $(LDFLAGS) $(OSKIT_LDFLAGS) \
		-Ttext $(PXE_LINK_ADDR) \
		-oformat binary -o pxeboot $(OBJFILES) $(LIBS)

pxeboot.gdb: $(OBJFILES) $(DEPENDLIBS)
	$(LD) $(LDFLAGS) $(OSKIT_LDFLAGS) \
		-Ttext $(PXE_LINK_ADDR) -o pxeboot.gdb $(OBJFILES) $(LIBS)
	@echo "Grepping for _end. It should be less than 0xFFFF"
	@$(NM) pxeboot.gdb | grep " _end"

version.c: $(filter-out version.o,$(DEPS))
	echo >$@ "char version[] = \"PXE Boot Program v1.0.0\";"
	echo >>$@ "char build_info[] = \"Built `date +\"%d-%b-%Y %H:%M:%S\"` by `id -nu`@`hostname | sed 's/\..*//'`:`pwd`\";"
CLEAN_FILES += version.c

$(INSTALL_LIBDIR)/boot/%: %
	-mkdir -p $(@D)
	$(INSTALL_PROGRAM) $< $@

endif