4 # This file is included by the global makefile so that you can add your own
5 # architecture-specific flags and dependencies. Remember to do have actions
6 # for "archclean" and "archdep" for cleaning up and making dependencies for
9 # This file is subject to the terms and conditions of the GNU General Public
10 # License. See the file "COPYING" in the main directory of this archive
13 # Copyright (C) 1994 by Linus Torvalds
15 # 19990713 Artur Skawina <skawina@geocities.com>
16 # Added '-march' and '-mpreferred-stack-boundary' support
17 # 20000913 Pavel Machek <pavel@suse.cz>
18 # Converted for x86_64 architecture
19 # 20010105 Andi Kleen, add IA32 compiler.
20 # ....and later removed it again....
22 # $Id: Makefile,v 1.31 2002/03/22 15:56:07 ak Exp $
24 # BITS is used as extension for files which are available in a 32 bit
25 # and a 64 bit version to simplify shared Makefiles.
26 # e.g.: obj-y += foo_$(BITS).o
30 LDFLAGS := -m elf_x86_64
31 OBJCOPYFLAGS := -O binary -R .note -R .comment -S
33 CHECKFLAGS += -D__x86_64__ -m64
37 cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
38 cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
39 # gcc doesn't support -march=core2 yet as of gcc 4.3, but I hope it
40 # will eventually. Use -mtune=generic as fallback
41 cflags-$(CONFIG_MCORE2) += \
42 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
43 cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
46 cflags-y += -mno-red-zone
47 cflags-y += -mcmodel=kernel
49 cflags-y += -Wno-sign-compare
50 cflags-y += -fno-asynchronous-unwind-tables
51 ifneq ($(CONFIG_DEBUG_INFO),y)
52 # -fweb shrinks the kernel a bit, but the difference is very small
53 # it also messes up debugging, so don't use it for now.
54 #cflags-y += $(call cc-option,-fweb)
56 # -funit-at-a-time shrinks the kernel .text considerably
57 # unfortunately it makes reading oopses harder.
58 cflags-y += $(call cc-option,-funit-at-a-time)
59 # prevent gcc from generating any FP code by mistake
60 cflags-y += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
61 # this works around some issues with generating unwind tables in older gccs
62 # newer gccs do it by default
63 cflags-y += -maccumulate-outgoing-args
65 # do binutils support CFI?
66 cflags-y += $(call as-instr,.cfi_startproc\n.cfi_rel_offset rsp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
67 KBUILD_AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_rel_offset rsp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
69 # is .cfi_signal_frame supported too?
70 cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
71 KBUILD_AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
73 cflags-$(CONFIG_CC_STACKPROTECTOR) += $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh "$(CC)" -fstack-protector )
74 cflags-$(CONFIG_CC_STACKPROTECTOR_ALL) += $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh "$(CC)" -fstack-protector-all )
76 KBUILD_CFLAGS += $(cflags-y)
77 CFLAGS_KERNEL += $(cflags-kernel-y)
80 head-y := arch/x86/kernel/head_64.o arch/x86/kernel/head64.o arch/x86/kernel/init_task.o
82 libs-y += arch/x86/lib/
83 core-y += arch/x86/kernel/ \
87 core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
88 drivers-$(CONFIG_PCI) += arch/x86/pci/
89 drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
93 PHONY += bzImage bzlilo install archmrproper \
94 fdimage fdimage144 fdimage288 isoimage archclean
96 #Default target when executing "make"
99 BOOTIMAGE := arch/x86/boot/bzImage
100 KBUILD_IMAGE := $(BOOTIMAGE)
103 $(Q)$(MAKE) $(build)=$(boot) $(BOOTIMAGE)
104 $(Q)mkdir -p $(objtree)/arch/x86_64/boot
105 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/x86_64/boot/bzImage
108 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) zlilo
111 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) zdisk
113 fdimage fdimage144 fdimage288 isoimage: vmlinux
114 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) $@
116 install: vdso_install
117 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) $@
120 ifeq ($(CONFIG_IA32_EMULATION),y)
121 $(Q)$(MAKE) $(build)=arch/x86/ia32 $@
123 $(Q)$(MAKE) $(build)=arch/x86/vdso $@
126 $(Q)rm -rf $(objtree)/arch/x86_64/boot
127 $(Q)$(MAKE) $(clean)=$(boot)
130 echo '* bzImage - Compressed kernel image (arch/$(ARCH)/boot/bzImage)'
131 echo ' install - Install kernel using'
132 echo ' (your) ~/bin/installkernel or'
133 echo ' (distribution) /sbin/installkernel or'
134 echo ' install to $$(INSTALL_PATH) and run lilo'
135 echo ' bzdisk - Create a boot floppy in /dev/fd0'
136 echo ' fdimage - Create a boot floppy image'
137 echo ' isoimage - Create a boot CD-ROM image'
140 CLEAN_FILES += arch/$(ARCH)/boot/fdimage \
141 arch/$(ARCH)/boot/image.iso \
142 arch/$(ARCH)/boot/mtools.conf