Makefile - seabios - Git at Google


            
            # SeaBIOS build system

            
            #

            
            # Copyright (C) 2008-2012  Kevin O'Connor <kevin@koconnor.net>

            
            #

            
            # This file may be distributed under the terms of the GNU LGPLv3 license.


            # Output directory

            
            OUT=out/


            # Common command definitions

            
            export HOSTCC             := $(CC)

            
            export CONFIG_SHELL       := sh

            
            export KCONFIG_AUTOHEADER := autoconf.h

            
            export KCONFIG_CONFIG     := $(CURDIR)/.config

            
            export LC_ALL             := C

            
            CROSS_PREFIX=

            
            ifneq ($(CROSS_PREFIX),)

            
            CC=$(CROSS_PREFIX)gcc

            
            endif

            
            AS=$(CROSS_PREFIX)as

            
            LD=$(CROSS_PREFIX)ld

            
            OBJCOPY=$(CROSS_PREFIX)objcopy

            
            OBJDUMP=$(CROSS_PREFIX)objdump

            
            STRIP=$(CROSS_PREFIX)strip

            
            PYTHON=python

            
            CPP=cpp

            
            LD32BIT_FLAG:=-melf_i386


            # Source files

            
            SRCBOTH=misc.c stacks.c output.c string.c block.c cdrom.c disk.c	\

            
                mouse.c kbd.c system.c serial.c sercon.c clock.c resume.c		\

            
                pnpbios.c vgahooks.c pcibios.c apm.c cp437.c hw/pci.c hw/timer.c	\

            
                hw/rtc.c hw/dma.c hw/pic.c hw/ps2port.c hw/serialio.c hw/usb.c	\

            
                hw/usb-uhci.c hw/usb-ohci.c hw/usb-ehci.c hw/usb-hid.c		\

            
                hw/usb-msc.c hw/usb-uas.c hw/blockcmd.c hw/floppy.c hw/ata.c	\

            
                hw/ramdisk.c hw/lsi-scsi.c hw/esp-scsi.c hw/megasas.c		\

            
                hw/mpt-scsi.c

            
            SRC16=$(SRCBOTH)

            
            SRC32FLAT=$(SRCBOTH) post.c e820map.c malloc.c romfile.c x86.c		\

            
                optionroms.c pmm.c font.c boot.c bootsplash.c jpeg.c bmp.c		\

            
                tcgbios.c sha1.c hw/pcidevice.c hw/ahci.c hw/pvscsi.c		\

            
                hw/usb-xhci.c hw/usb-hub.c hw/sdcard.c fw/coreboot.c		\

            
                fw/lzmadecode.c fw/multiboot.c fw/csm.c fw/biostables.c		\

            
                fw/paravirt.c fw/shadow.c fw/pciinit.c fw/smm.c fw/smp.c		\

            
                fw/mtrr.c fw/xen.c fw/acpi.c fw/mptable.c fw/pirtable.c		\

            
                fw/smbios.c fw/romfile_loader.c fw/dsdt_parser.c hw/virtio-ring.c	\

            
                hw/virtio-pci.c hw/virtio-mmio.c hw/virtio-blk.c hw/virtio-scsi.c	\

            
                hw/tpm_drivers.c hw/nvme.c sha256.c sha512.c

            
            SRC32SEG=string.c output.c pcibios.c apm.c stacks.c hw/pci.c hw/serialio.c

            
            DIRS=src src/hw src/fw vgasrc


            # Default compiler flags

            
            cc-option=$(shell if test -z "`$(1) $(2) -S -o /dev/null -xc /dev/null 2>&1`" \

            
                ; then echo "$(2)"; else echo "$(3)"; fi ;)


            EXTRAVERSION=


            CPPFLAGS = -P -MD -MT $@


            COMMONCFLAGS := -I$(OUT) -Isrc -Os -MD -g \

            
                -Wall -Wno-strict-aliasing -Wold-style-definition \

            
                $(call cc-option,$(CC),-Wtype-limits,) \

            
                -m32 -march=i386 -mregparm=3 -mpreferred-stack-boundary=2 \

            
                -minline-all-stringops -fomit-frame-pointer \

            
                -freg-struct-return -ffreestanding -fno-delete-null-pointer-checks \

            
                -ffunction-sections -fdata-sections -fno-common -fno-merge-constants

            
            COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)

            
            COMMONCFLAGS += $(call cc-option,$(CC),-fno-pie,)

            
            COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)

            
            COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)

            
            COMMONCFLAGS += $(call cc-option,$(CC),-fstack-check=no,)

            
            COMMONCFLAGS += $(call cc-option,$(CC),-Wno-address-of-packed-member,)

            
            COMMONCFLAGS += $(call cc-option,$(CC),-Wno-array-bounds,)

            
            COMMONCFLAGS += $(call cc-option,$(CC),-fcf-protection=none,)

            
            COMMA := ,


            CFLAGS32FLAT := $(COMMONCFLAGS) -DMODE16=0 -DMODESEGMENT=0

            
            CFLAGSSEG := $(COMMONCFLAGS) -DMODESEGMENT=1 -fno-defer-pop \

            
                $(call cc-option,$(CC),-fno-jump-tables,-DMANUAL_NO_JUMP_TABLE) \

            
                $(call cc-option,$(CC),-fno-tree-switch-conversion,)

            
            CFLAGS32SEG := $(CFLAGSSEG) -DMODE16=0

            
            CFLAGS16 := $(CFLAGSSEG) -DMODE16=1 \

            
                $(call cc-option,$(CC),-m16,-Wa$(COMMA)src/code16gcc.s) \

            
                $(call cc-option,$(CC),--param large-stack-frame=4,-fno-inline)


            # Run with "make V=1" to see the actual compile commands

            
            ifdef V

            
            Q=

            
            else

            
            Q=@

            
            MAKEFLAGS += --no-print-directory

            
            endif


            # Default targets

            
            -include $(KCONFIG_CONFIG)


            target-y :=

            
            target-$(CONFIG_QEMU) += $(OUT)bios.bin

            
            target-$(CONFIG_CSM) += $(OUT)Csm16.bin

            
            target-$(CONFIG_COREBOOT) += $(OUT)bios.bin.elf

            
            target-$(CONFIG_BUILD_VGABIOS) += $(OUT)vgabios.bin


            all: $(target-y)


            # Make definitions

            
            .PHONY : all clean distclean FORCE

            
            .DELETE_ON_ERROR:


            ################ Common build rules


            # Verify the build environment works.

            
            TESTGCC:=$(shell OUT="$(OUT)" CC="$(CC)" LD="$(LD)" scripts/test-build.sh)

            
            ifeq "$(TESTGCC)" "-1"

            
            $(error "Please upgrade the build environment")

            
            endif


            ifeq "$(TESTGCC)" "0"

            
            # Use -fwhole-program

            
            CFLAGSWHOLE=-fwhole-program -DWHOLE_PROGRAM

            
            endif


            # Do a whole file compile by textually including all C code.

            
            define whole-compile

            
            @echo "  Compiling whole program $3"

            
            $(Q)printf '$(foreach i,$2,#include "$i"\n)' > $3.tmp.c

            
            $(Q)$(CC) -I. $1 $(CFLAGSWHOLE) -c $3.tmp.c -o $3

            
            endef


            %.noexec.o: %.o

            
            	@echo "  Stripping $@"

            
            	$(Q)$(STRIP) $< -o $<.strip.o

            
            	$(Q)$(PYTHON) ./scripts/ldnoexec.py $<.strip.o $@


            $(OUT)%.s: %.c

            
            	@echo "  Compiling to assembler $@"

            
            	$(Q)$(CC) $(CFLAGS16) -S -c $< -o $@


            $(OUT)%.o: %.c $(OUT)autoconf.h

            
            	@echo "  Compile checking $@"

            
            	$(Q)$(CC) $(CFLAGS32FLAT) -c $< -o $@


            $(OUT)%.lds: %.lds.S

            
            	@echo "  Precompiling $@"

            
            	$(Q)$(CPP) $(CPPFLAGS) -D__ASSEMBLY__ $< -o $@


            ################ Main BIOS build rules


            $(OUT)asm-offsets.s: $(OUT)autoconf.h


            $(OUT)asm-offsets.h: $(OUT)src/asm-offsets.s

            
            	@echo "  Generating offset file $@"

            
            	$(Q)./scripts/gen-offsets.sh $< $@


            $(OUT)ccode16.o: $(OUT)autoconf.h $(patsubst %.c, $(OUT)src/%.o,$(SRC16)) ; $(call whole-compile, $(CFLAGS16), $(addprefix src/, $(SRC16)),$@)


            $(OUT)code32seg.o: $(OUT)autoconf.h $(patsubst %.c, $(OUT)src/%.o,$(SRC32SEG)) ; $(call whole-compile, $(CFLAGS32SEG), $(addprefix src/, $(SRC32SEG)),$@)


            $(OUT)ccode32flat.o: $(OUT)autoconf.h $(patsubst %.c, $(OUT)src/%.o,$(SRC32FLAT)) ; $(call whole-compile, $(CFLAGS32FLAT), $(addprefix src/, $(SRC32FLAT)),$@)


            $(OUT)romlayout.o: src/romlayout.S $(OUT)autoconf.h $(OUT)asm-offsets.h

            
            	@echo "  Compiling (16bit) $@"

            
            	$(Q)$(CC) $(CFLAGS16) -c -D__ASSEMBLY__ $< -o $@


            $(OUT)romlayout16.lds: $(OUT)ccode32flat.o $(OUT)code32seg.o $(OUT)ccode16.o $(OUT)romlayout.o src/version.c scripts/layoutrom.py scripts/buildversion.py

            
            	@echo "  Building ld scripts"

            
            	$(Q)$(PYTHON) ./scripts/buildversion.py -e "$(EXTRAVERSION)" -t "$(CC);$(AS);$(LD);$(OBJCOPY);$(OBJDUMP);$(STRIP)" $(OUT)autoversion.h

            
            	$(Q)$(CC) $(CFLAGS32FLAT) -c src/version.c -o $(OUT)version.o

            
            	$(Q)$(LD) $(LD32BIT_FLAG) -r $(OUT)ccode32flat.o $(OUT)version.o -o $(OUT)code32flat.o

            
            	$(Q)$(LD) $(LD32BIT_FLAG) -r $(OUT)ccode16.o $(OUT)romlayout.o -o $(OUT)code16.o

            
            	$(Q)$(OBJDUMP) -thr $(OUT)code32flat.o > $(OUT)code32flat.o.objdump

            
            	$(Q)$(OBJDUMP) -thr $(OUT)code32seg.o > $(OUT)code32seg.o.objdump

            
            	$(Q)$(OBJDUMP) -thr $(OUT)code16.o > $(OUT)code16.o.objdump

            
            	$(Q)$(PYTHON) ./scripts/layoutrom.py $(OUT)code16.o.objdump $(OUT)code32seg.o.objdump $(OUT)code32flat.o.objdump $(OUT)$(KCONFIG_AUTOHEADER) $(OUT)romlayout16.lds $(OUT)romlayout32seg.lds $(OUT)romlayout32flat.lds


            # These are actually built by scripts/layoutrom.py above, but by pulling them

            
            # into an extra rule we prevent make -j from spawning layoutrom.py 4 times.

            
            $(OUT)romlayout32seg.lds $(OUT)romlayout32flat.lds $(OUT)code32flat.o $(OUT)code16.o: $(OUT)romlayout16.lds


            $(OUT)rom16.o: $(OUT)code16.o $(OUT)romlayout16.lds

            
            	@echo "  Linking $@"

            
            	$(Q)$(LD) -T $(OUT)romlayout16.lds $< -o $@


            $(OUT)rom32seg.o: $(OUT)code32seg.o $(OUT)romlayout32seg.lds

            
            	@echo "  Linking $@"

            
            	$(Q)$(LD) -T $(OUT)romlayout32seg.lds $< -o $@


            $(OUT)rom.o: $(OUT)rom16.noexec.o $(OUT)rom32seg.noexec.o $(OUT)code32flat.o $(OUT)romlayout32flat.lds

            
            	@echo "  Linking $@"

            
            	$(Q)$(LD) -N -T $(OUT)romlayout32flat.lds $(OUT)rom16.noexec.o $(OUT)rom32seg.noexec.o $(OUT)code32flat.o -o $@


            $(OUT)bios.bin.prep: $(OUT)rom.o scripts/checkrom.py

            
            	@echo "  Prepping $@"

            
            	$(Q)rm -f $(OUT)bios.bin $(OUT)Csm16.bin $(OUT)bios.bin.elf

            
            	$(Q)$(OBJDUMP) -thr $< > $<.objdump

            
            	$(Q)$(OBJCOPY) -O binary $< $(OUT)bios.bin.raw

            
            	$(Q)$(PYTHON) ./scripts/checkrom.py $<.objdump $(CONFIG_ROM_SIZE) $(OUT)bios.bin.raw $(OUT)bios.bin.prep


            $(OUT)bios.bin: $(OUT)bios.bin.prep

            
            	@echo "  Creating $@"

            
            	$(Q)cp $< $@


            $(OUT)Csm16.bin: $(OUT)bios.bin.prep

            
            	@echo "  Creating $@"

            
            	$(Q)cp $< $@


            $(OUT)bios.bin.elf: $(OUT)rom.o $(OUT)bios.bin.prep

            
            	@echo "  Creating $@"

            
            	$(Q)$(STRIP) -R .comment $< -o $(OUT)bios.bin.elf


            ################ VGA build rules


            # VGA src files

            
            SRCVGA=src/output.c src/string.c src/hw/pci.c src/hw/serialio.c \

            
                vgasrc/vgainit.c vgasrc/vgabios.c vgasrc/vgafb.c vgasrc/swcursor.c \

            
                vgasrc/vgafonts.c vgasrc/vbe.c \

            
                vgasrc/stdvga.c vgasrc/stdvgamodes.c vgasrc/stdvgaio.c \

            
                vgasrc/clext.c vgasrc/svgamodes.c vgasrc/atiext.c vgasrc/bochsvga.c vgasrc/geodevga.c \

            
                src/fw/coreboot.c vgasrc/cbvga.c vgasrc/bochsdisplay.c vgasrc/ramfb.c


            ifeq "$(CONFIG_VGA_FIXUP_ASM)" "y"

            
            $(OUT)vgaccode16.raw.s: $(OUT)autoconf.h $(patsubst %.c, $(OUT)%.o,$(SRCVGA)) ; $(call whole-compile, $(filter-out -fomit-frame-pointer,$(CFLAGS16)) -fno-omit-frame-pointer -S -Isrc, $(SRCVGA),$@)


            $(OUT)vgaccode16.o: $(OUT)vgaccode16.raw.s scripts/vgafixup.py

            
            	@echo "  Fixup VGA rom assembler"

            
            	$(Q)$(PYTHON) ./scripts/vgafixup.py $< $(OUT)vgaccode16.s

            
            	$(Q)$(AS) --32 src/code16gcc.s $(OUT)vgaccode16.s -o $@

            
            else

            
            $(OUT)vgaccode16.o: $(OUT)autoconf.h $(patsubst %.c, $(OUT)%.o,$(SRCVGA)) ; $(call whole-compile, $(CFLAGS16) -Isrc, $(SRCVGA),$@)

            
            endif


            $(OUT)vgaentry.o: vgasrc/vgaentry.S $(OUT)autoconf.h $(OUT)asm-offsets.h

            
            	@echo "  Compiling (16bit) $@"

            
            	$(Q)$(CC) $(CFLAGS16) -c -D__ASSEMBLY__ $< -o $@


            $(OUT)vgarom.o: $(OUT)vgaccode16.o $(OUT)vgaentry.o $(OUT)vgasrc/vgalayout.lds vgasrc/vgaversion.c scripts/buildversion.py

            
            	@echo "  Linking $@"

            
            	$(Q)$(PYTHON) ./scripts/buildversion.py -e "$(EXTRAVERSION)" -t "$(CC);$(AS);$(LD);$(OBJCOPY);$(OBJDUMP);$(STRIP)" $(OUT)autovgaversion.h

            
            	$(Q)$(CC) $(CFLAGS16) -c vgasrc/vgaversion.c -o $(OUT)vgaversion.o

            
            	$(Q)$(LD) --gc-sections -T $(OUT)vgasrc/vgalayout.lds $(OUT)vgaccode16.o $(OUT)vgaentry.o $(OUT)vgaversion.o -o $@


            $(OUT)vgabios.bin.raw: $(OUT)vgarom.o

            
            	@echo "  Extracting binary $@"

            
            	$(Q)$(OBJCOPY) -O binary $< $@


            $(OUT)vgabios.bin: $(OUT)vgabios.bin.raw scripts/buildrom.py

            
            	@echo "  Finalizing rom $@"

            
            	$(Q)$(PYTHON) ./scripts/buildrom.py $< $@


            ################ Kconfig rules


            define do-kconfig

            
            $(Q)mkdir -p $(OUT)/scripts/kconfig/lxdialog

            
            $(Q)mkdir -p $(OUT)/include/config

            
            $(Q)mkdir -p $(addprefix $(OUT), $(DIRS))

            
            $(Q)$(MAKE) -C $(OUT) -f $(CURDIR)/scripts/kconfig/Makefile srctree=$(CURDIR) src=scripts/kconfig obj=scripts/kconfig Q=$(Q) Kconfig=$(CURDIR)/src/Kconfig $1

            
            endef


            $(OUT)autoconf.h : $(KCONFIG_CONFIG) ; $(call do-kconfig, silentoldconfig)

            
            $(KCONFIG_CONFIG): src/Kconfig vgasrc/Kconfig ; $(call do-kconfig, olddefconfig)

            
            %onfig: ; $(call do-kconfig, $@)

            
            help: ; $(call do-kconfig, $@)


            ################ Generic rules


            clean:

            
            	$(Q)rm -rf $(OUT)


            distclean: clean

            
            	$(Q)rm -f .config .config.old


            -include $(OUT)*.d $(patsubst %,$(OUT)%/*.d,$(DIRS))
	# SeaBIOS build system
	#
	# Copyright (C) 2008-2012 Kevin O'Connor <kevin@koconnor.net>
	#
	# This file may be distributed under the terms of the GNU LGPLv3 license.

	# Output directory
	OUT=out/

	# Common command definitions
	export HOSTCC := $(CC)
	export CONFIG_SHELL := sh
	export KCONFIG_AUTOHEADER := autoconf.h
	export KCONFIG_CONFIG := $(CURDIR)/.config
	export LC_ALL := C
	CROSS_PREFIX=
	ifneq ($(CROSS_PREFIX),)
	CC=$(CROSS_PREFIX)gcc
	endif
	AS=$(CROSS_PREFIX)as
	LD=$(CROSS_PREFIX)ld
	OBJCOPY=$(CROSS_PREFIX)objcopy
	OBJDUMP=$(CROSS_PREFIX)objdump
	STRIP=$(CROSS_PREFIX)strip
	PYTHON=python
	CPP=cpp
	LD32BIT_FLAG:=-melf_i386

	# Source files
	SRCBOTH=misc.c stacks.c output.c string.c block.c cdrom.c disk.c \
	mouse.c kbd.c system.c serial.c sercon.c clock.c resume.c \
	pnpbios.c vgahooks.c pcibios.c apm.c cp437.c hw/pci.c hw/timer.c \
	hw/rtc.c hw/dma.c hw/pic.c hw/ps2port.c hw/serialio.c hw/usb.c \
	hw/usb-uhci.c hw/usb-ohci.c hw/usb-ehci.c hw/usb-hid.c \
	hw/usb-msc.c hw/usb-uas.c hw/blockcmd.c hw/floppy.c hw/ata.c \
	hw/ramdisk.c hw/lsi-scsi.c hw/esp-scsi.c hw/megasas.c \
	hw/mpt-scsi.c
	SRC16=$(SRCBOTH)
	SRC32FLAT=$(SRCBOTH) post.c e820map.c malloc.c romfile.c x86.c \
	optionroms.c pmm.c font.c boot.c bootsplash.c jpeg.c bmp.c \
	tcgbios.c sha1.c hw/pcidevice.c hw/ahci.c hw/pvscsi.c \
	hw/usb-xhci.c hw/usb-hub.c hw/sdcard.c fw/coreboot.c \
	fw/lzmadecode.c fw/multiboot.c fw/csm.c fw/biostables.c \
	fw/paravirt.c fw/shadow.c fw/pciinit.c fw/smm.c fw/smp.c \
	fw/mtrr.c fw/xen.c fw/acpi.c fw/mptable.c fw/pirtable.c \
	fw/smbios.c fw/romfile_loader.c fw/dsdt_parser.c hw/virtio-ring.c \
	hw/virtio-pci.c hw/virtio-mmio.c hw/virtio-blk.c hw/virtio-scsi.c \
	hw/tpm_drivers.c hw/nvme.c sha256.c sha512.c
	SRC32SEG=string.c output.c pcibios.c apm.c stacks.c hw/pci.c hw/serialio.c
	DIRS=src src/hw src/fw vgasrc

	# Default compiler flags
	cc-option=$(shell if test -z "`$(1) $(2) -S -o /dev/null -xc /dev/null 2>&1`" \
	; then echo "$(2)"; else echo "$(3)"; fi ;)

	EXTRAVERSION=

	CPPFLAGS = -P -MD -MT $@

	COMMONCFLAGS := -I$(OUT) -Isrc -Os -MD -g \
	-Wall -Wno-strict-aliasing -Wold-style-definition \
	$(call cc-option,$(CC),-Wtype-limits,) \
	-m32 -march=i386 -mregparm=3 -mpreferred-stack-boundary=2 \
	-minline-all-stringops -fomit-frame-pointer \
	-freg-struct-return -ffreestanding -fno-delete-null-pointer-checks \
	-ffunction-sections -fdata-sections -fno-common -fno-merge-constants
	COMMONCFLAGS += $(call cc-option,$(CC),-nopie,)
	COMMONCFLAGS += $(call cc-option,$(CC),-fno-pie,)
	COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
	COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)
	COMMONCFLAGS += $(call cc-option,$(CC),-fstack-check=no,)
	COMMONCFLAGS += $(call cc-option,$(CC),-Wno-address-of-packed-member,)
	COMMONCFLAGS += $(call cc-option,$(CC),-Wno-array-bounds,)
	COMMONCFLAGS += $(call cc-option,$(CC),-fcf-protection=none,)
	COMMA := ,

	CFLAGS32FLAT := $(COMMONCFLAGS) -DMODE16=0 -DMODESEGMENT=0
	CFLAGSSEG := $(COMMONCFLAGS) -DMODESEGMENT=1 -fno-defer-pop \
	$(call cc-option,$(CC),-fno-jump-tables,-DMANUAL_NO_JUMP_TABLE) \
	$(call cc-option,$(CC),-fno-tree-switch-conversion,)
	CFLAGS32SEG := $(CFLAGSSEG) -DMODE16=0
	CFLAGS16 := $(CFLAGSSEG) -DMODE16=1 \
	$(call cc-option,$(CC),-m16,-Wa$(COMMA)src/code16gcc.s) \
	$(call cc-option,$(CC),--param large-stack-frame=4,-fno-inline)

	# Run with "make V=1" to see the actual compile commands
	ifdef V
	Q=
	else
	Q=@
	MAKEFLAGS += --no-print-directory
	endif

	# Default targets
	-include $(KCONFIG_CONFIG)

	target-y :=
	target-$(CONFIG_QEMU) += $(OUT)bios.bin
	target-$(CONFIG_CSM) += $(OUT)Csm16.bin
	target-$(CONFIG_COREBOOT) += $(OUT)bios.bin.elf
	target-$(CONFIG_BUILD_VGABIOS) += $(OUT)vgabios.bin

	all: $(target-y)

	# Make definitions
	.PHONY : all clean distclean FORCE
	.DELETE_ON_ERROR:


	################ Common build rules

	# Verify the build environment works.
	TESTGCC:=$(shell OUT="$(OUT)" CC="$(CC)" LD="$(LD)" scripts/test-build.sh)
	ifeq "$(TESTGCC)" "-1"
	$(error "Please upgrade the build environment")
	endif

	ifeq "$(TESTGCC)" "0"
	# Use -fwhole-program
	CFLAGSWHOLE=-fwhole-program -DWHOLE_PROGRAM
	endif

	# Do a whole file compile by textually including all C code.
	define whole-compile
	@echo " Compiling whole program $3"
	$(Q)printf '$(foreach i,$2,#include "$i"\n)' > $3.tmp.c
	$(Q)$(CC) -I. $1 $(CFLAGSWHOLE) -c $3.tmp.c -o $3
	endef

	%.noexec.o: %.o
	@echo " Stripping $@"
	$(Q)$(STRIP) $< -o $<.strip.o
	$(Q)$(PYTHON) ./scripts/ldnoexec.py $<.strip.o $@

	$(OUT)%.s: %.c
	@echo " Compiling to assembler $@"
	$(Q)$(CC) $(CFLAGS16) -S -c $< -o $@

	$(OUT)%.o: %.c $(OUT)autoconf.h
	@echo " Compile checking $@"
	$(Q)$(CC) $(CFLAGS32FLAT) -c $< -o $@

	$(OUT)%.lds: %.lds.S
	@echo " Precompiling $@"
	$(Q)$(CPP) $(CPPFLAGS) -D__ASSEMBLY__ $< -o $@


	################ Main BIOS build rules

	$(OUT)asm-offsets.s: $(OUT)autoconf.h

	$(OUT)asm-offsets.h: $(OUT)src/asm-offsets.s
	@echo " Generating offset file $@"
	$(Q)./scripts/gen-offsets.sh $< $@

	$(OUT)ccode16.o: $(OUT)autoconf.h $(patsubst %.c, $(OUT)src/%.o,$(SRC16)) ; $(call whole-compile, $(CFLAGS16), $(addprefix src/, $(SRC16)),$@)

	$(OUT)code32seg.o: $(OUT)autoconf.h $(patsubst %.c, $(OUT)src/%.o,$(SRC32SEG)) ; $(call whole-compile, $(CFLAGS32SEG), $(addprefix src/, $(SRC32SEG)),$@)

	$(OUT)ccode32flat.o: $(OUT)autoconf.h $(patsubst %.c, $(OUT)src/%.o,$(SRC32FLAT)) ; $(call whole-compile, $(CFLAGS32FLAT), $(addprefix src/, $(SRC32FLAT)),$@)

	$(OUT)romlayout.o: src/romlayout.S $(OUT)autoconf.h $(OUT)asm-offsets.h
	@echo " Compiling (16bit) $@"
	$(Q)$(CC) $(CFLAGS16) -c -D__ASSEMBLY__ $< -o $@

	$(OUT)romlayout16.lds: $(OUT)ccode32flat.o $(OUT)code32seg.o $(OUT)ccode16.o $(OUT)romlayout.o src/version.c scripts/layoutrom.py scripts/buildversion.py
	@echo " Building ld scripts"
	$(Q)$(PYTHON) ./scripts/buildversion.py -e "$(EXTRAVERSION)" -t "$(CC);$(AS);$(LD);$(OBJCOPY);$(OBJDUMP);$(STRIP)" $(OUT)autoversion.h
	$(Q)$(CC) $(CFLAGS32FLAT) -c src/version.c -o $(OUT)version.o
	$(Q)$(LD) $(LD32BIT_FLAG) -r $(OUT)ccode32flat.o $(OUT)version.o -o $(OUT)code32flat.o
	$(Q)$(LD) $(LD32BIT_FLAG) -r $(OUT)ccode16.o $(OUT)romlayout.o -o $(OUT)code16.o
	$(Q)$(OBJDUMP) -thr $(OUT)code32flat.o > $(OUT)code32flat.o.objdump
	$(Q)$(OBJDUMP) -thr $(OUT)code32seg.o > $(OUT)code32seg.o.objdump
	$(Q)$(OBJDUMP) -thr $(OUT)code16.o > $(OUT)code16.o.objdump
	$(Q)$(PYTHON) ./scripts/layoutrom.py $(OUT)code16.o.objdump $(OUT)code32seg.o.objdump $(OUT)code32flat.o.objdump $(OUT)$(KCONFIG_AUTOHEADER) $(OUT)romlayout16.lds $(OUT)romlayout32seg.lds $(OUT)romlayout32flat.lds

	# These are actually built by scripts/layoutrom.py above, but by pulling them
	# into an extra rule we prevent make -j from spawning layoutrom.py 4 times.
	$(OUT)romlayout32seg.lds $(OUT)romlayout32flat.lds $(OUT)code32flat.o $(OUT)code16.o: $(OUT)romlayout16.lds

	$(OUT)rom16.o: $(OUT)code16.o $(OUT)romlayout16.lds
	@echo " Linking $@"
	$(Q)$(LD) -T $(OUT)romlayout16.lds $< -o $@

	$(OUT)rom32seg.o: $(OUT)code32seg.o $(OUT)romlayout32seg.lds
	@echo " Linking $@"
	$(Q)$(LD) -T $(OUT)romlayout32seg.lds $< -o $@

	$(OUT)rom.o: $(OUT)rom16.noexec.o $(OUT)rom32seg.noexec.o $(OUT)code32flat.o $(OUT)romlayout32flat.lds
	@echo " Linking $@"
	$(Q)$(LD) -N -T $(OUT)romlayout32flat.lds $(OUT)rom16.noexec.o $(OUT)rom32seg.noexec.o $(OUT)code32flat.o -o $@

	$(OUT)bios.bin.prep: $(OUT)rom.o scripts/checkrom.py
	@echo " Prepping $@"
	$(Q)rm -f $(OUT)bios.bin $(OUT)Csm16.bin $(OUT)bios.bin.elf
	$(Q)$(OBJDUMP) -thr $< > $<.objdump
	$(Q)$(OBJCOPY) -O binary $< $(OUT)bios.bin.raw
	$(Q)$(PYTHON) ./scripts/checkrom.py $<.objdump $(CONFIG_ROM_SIZE) $(OUT)bios.bin.raw $(OUT)bios.bin.prep

	$(OUT)bios.bin: $(OUT)bios.bin.prep
	@echo " Creating $@"
	$(Q)cp $< $@

	$(OUT)Csm16.bin: $(OUT)bios.bin.prep
	@echo " Creating $@"
	$(Q)cp $< $@

	$(OUT)bios.bin.elf: $(OUT)rom.o $(OUT)bios.bin.prep
	@echo " Creating $@"
	$(Q)$(STRIP) -R .comment $< -o $(OUT)bios.bin.elf


	################ VGA build rules

	# VGA src files
	SRCVGA=src/output.c src/string.c src/hw/pci.c src/hw/serialio.c \
	vgasrc/vgainit.c vgasrc/vgabios.c vgasrc/vgafb.c vgasrc/swcursor.c \
	vgasrc/vgafonts.c vgasrc/vbe.c \
	vgasrc/stdvga.c vgasrc/stdvgamodes.c vgasrc/stdvgaio.c \
	vgasrc/clext.c vgasrc/svgamodes.c vgasrc/atiext.c vgasrc/bochsvga.c vgasrc/geodevga.c \
	src/fw/coreboot.c vgasrc/cbvga.c vgasrc/bochsdisplay.c vgasrc/ramfb.c

	ifeq "$(CONFIG_VGA_FIXUP_ASM)" "y"
	$(OUT)vgaccode16.raw.s: $(OUT)autoconf.h $(patsubst %.c, $(OUT)%.o,$(SRCVGA)) ; $(call whole-compile, $(filter-out -fomit-frame-pointer,$(CFLAGS16)) -fno-omit-frame-pointer -S -Isrc, $(SRCVGA),$@)

	$(OUT)vgaccode16.o: $(OUT)vgaccode16.raw.s scripts/vgafixup.py
	@echo " Fixup VGA rom assembler"
	$(Q)$(PYTHON) ./scripts/vgafixup.py $< $(OUT)vgaccode16.s
	$(Q)$(AS) --32 src/code16gcc.s $(OUT)vgaccode16.s -o $@
	else
	$(OUT)vgaccode16.o: $(OUT)autoconf.h $(patsubst %.c, $(OUT)%.o,$(SRCVGA)) ; $(call whole-compile, $(CFLAGS16) -Isrc, $(SRCVGA),$@)
	endif

	$(OUT)vgaentry.o: vgasrc/vgaentry.S $(OUT)autoconf.h $(OUT)asm-offsets.h
	@echo " Compiling (16bit) $@"
	$(Q)$(CC) $(CFLAGS16) -c -D__ASSEMBLY__ $< -o $@

	$(OUT)vgarom.o: $(OUT)vgaccode16.o $(OUT)vgaentry.o $(OUT)vgasrc/vgalayout.lds vgasrc/vgaversion.c scripts/buildversion.py
	@echo " Linking $@"
	$(Q)$(PYTHON) ./scripts/buildversion.py -e "$(EXTRAVERSION)" -t "$(CC);$(AS);$(LD);$(OBJCOPY);$(OBJDUMP);$(STRIP)" $(OUT)autovgaversion.h
	$(Q)$(CC) $(CFLAGS16) -c vgasrc/vgaversion.c -o $(OUT)vgaversion.o
	$(Q)$(LD) --gc-sections -T $(OUT)vgasrc/vgalayout.lds $(OUT)vgaccode16.o $(OUT)vgaentry.o $(OUT)vgaversion.o -o $@

	$(OUT)vgabios.bin.raw: $(OUT)vgarom.o
	@echo " Extracting binary $@"
	$(Q)$(OBJCOPY) -O binary $< $@

	$(OUT)vgabios.bin: $(OUT)vgabios.bin.raw scripts/buildrom.py
	@echo " Finalizing rom $@"
	$(Q)$(PYTHON) ./scripts/buildrom.py $< $@


	################ Kconfig rules

	define do-kconfig
	$(Q)mkdir -p $(OUT)/scripts/kconfig/lxdialog
	$(Q)mkdir -p $(OUT)/include/config
	$(Q)mkdir -p $(addprefix $(OUT), $(DIRS))
	$(Q)$(MAKE) -C $(OUT) -f $(CURDIR)/scripts/kconfig/Makefile srctree=$(CURDIR) src=scripts/kconfig obj=scripts/kconfig Q=$(Q) Kconfig=$(CURDIR)/src/Kconfig $1
	endef

	$(OUT)autoconf.h : $(KCONFIG_CONFIG) ; $(call do-kconfig, silentoldconfig)
	$(KCONFIG_CONFIG): src/Kconfig vgasrc/Kconfig ; $(call do-kconfig, olddefconfig)
	%onfig: ; $(call do-kconfig, $@)
	help: ; $(call do-kconfig, $@)


	################ Generic rules

	clean:
	$(Q)rm -rf $(OUT)

	distclean: clean
	$(Q)rm -f .config .config.old

	-include $(OUT).d $(patsubst %,$(OUT)%/.d,$(DIRS))