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# x86_64/Makefile
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies. Remember to do have actions
# for "archclean" and "archdep" for cleaning up and making dependencies for
# this architecture
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
# Copyright (C) 1994 by Linus Torvalds
# 19990713 Artur Skawina <>
# Added '-march' and '-mpreferred-stack-boundary' support
# 20000913 Pavel Machek <>
# Converted for x86_64 architecture
# 20010105 Andi Kleen, add IA32 compiler.
# ....and later removed it again....
# $Id: Makefile,v 1.31 2002/03/22 15:56:07 ak Exp $
LDFLAGS := -m elf_x86_64
OBJCOPYFLAGS := -O binary -R .note -R .comment -S
LDFLAGS_vmlinux :=
CHECKFLAGS += -D__x86_64__ -m64
cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
CFLAGS += $(cflags-y)
CFLAGS += -m64
CFLAGS += -mno-red-zone
CFLAGS += -mcmodel=kernel
CFLAGS += -pipe
# this makes reading assembly source easier, but produces worse code
# actually it makes the kernel smaller too.
CFLAGS += -fno-reorder-blocks
CFLAGS += -Wno-sign-compare
CFLAGS += -fno-asynchronous-unwind-tables
ifneq ($(CONFIG_DEBUG_INFO),y)
# -fweb shrinks the kernel a bit, but the difference is very small
# it also messes up debugging, so don't use it for now.
#CFLAGS += $(call cc-option,-fweb)
# -funit-at-a-time shrinks the kernel .text considerably
# unfortunately it makes reading oopses harder.
CFLAGS += $(call cc-option,-funit-at-a-time)
# prevent gcc from generating any FP code by mistake
CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
AFLAGS += -m64
head-y := arch/x86_64/kernel/head.o arch/x86_64/kernel/head64.o arch/x86_64/kernel/init_task.o
libs-y += arch/x86_64/lib/
core-y += arch/x86_64/kernel/ \
arch/x86_64/mm/ \
core-$(CONFIG_IA32_EMULATION) += arch/x86_64/ia32/
drivers-$(CONFIG_PCI) += arch/x86_64/pci/
drivers-$(CONFIG_OPROFILE) += arch/x86_64/oprofile/
boot := arch/x86_64/boot
.PHONY: bzImage bzlilo install archmrproper \
fdimage fdimage144 fdimage288 archclean
#Default target when executing "make"
all: bzImage
BOOTIMAGE := arch/x86_64/boot/bzImage
bzImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(BOOTIMAGE)
bzlilo: vmlinux
$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) zlilo
bzdisk: vmlinux
$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) zdisk
fdimage fdimage144 fdimage288: vmlinux
$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) $@
$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) $@
$(Q)$(MAKE) $(clean)=$(boot)
define archhelp
echo '* bzImage - Compressed kernel image (arch/$(ARCH)/boot/bzImage)'
echo ' install - Install kernel using'
echo ' (your) ~/bin/installkernel or'
echo ' (distribution) /sbin/installkernel or'
echo ' install to $$(INSTALL_PATH) and run lilo'
CLEAN_FILES += arch/$(ARCH)/boot/fdimage arch/$(ARCH)/boot/mtools.conf