kbuild: enable 'make CFLAGS=...' to add additional options to CC
[deliverable/linux.git] / arch / x86_64 / Makefile
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1#
2# x86_64/Makefile
3#
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
7# this architecture
8#
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
11# for more details.
12#
13# Copyright (C) 1994 by Linus Torvalds
14#
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....
21#
22# $Id: Makefile,v 1.31 2002/03/22 15:56:07 ak Exp $
23
24# Fill in SRCARCH
25SRCARCH := x86
26
27LDFLAGS := -m elf_x86_64
28OBJCOPYFLAGS := -O binary -R .note -R .comment -S
29LDFLAGS_vmlinux :=
30CHECKFLAGS += -D__x86_64__ -m64
31
32cflags-y :=
33cflags-kernel-y :=
34cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
35cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
36# gcc doesn't support -march=core2 yet as of gcc 4.3, but I hope it
37# will eventually. Use -mtune=generic as fallback
38cflags-$(CONFIG_MCORE2) += \
39 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
40cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
41
42cflags-y += -m64
43cflags-y += -mno-red-zone
44cflags-y += -mcmodel=kernel
45cflags-y += -pipe
46cflags-y += -Wno-sign-compare
47cflags-y += -fno-asynchronous-unwind-tables
48ifneq ($(CONFIG_DEBUG_INFO),y)
49# -fweb shrinks the kernel a bit, but the difference is very small
50# it also messes up debugging, so don't use it for now.
51#cflags-y += $(call cc-option,-fweb)
52endif
53# -funit-at-a-time shrinks the kernel .text considerably
54# unfortunately it makes reading oopses harder.
55cflags-y += $(call cc-option,-funit-at-a-time)
56# prevent gcc from generating any FP code by mistake
57cflags-y += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
58# this works around some issues with generating unwind tables in older gccs
59# newer gccs do it by default
60cflags-y += -maccumulate-outgoing-args
61
62# do binutils support CFI?
63cflags-y += $(call as-instr,.cfi_startproc\n.cfi_rel_offset rsp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
64AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_rel_offset rsp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
65
66# is .cfi_signal_frame supported too?
67cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
68AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
69
70cflags-$(CONFIG_CC_STACKPROTECTOR) += $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh "$(CC)" -fstack-protector )
71cflags-$(CONFIG_CC_STACKPROTECTOR_ALL) += $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh "$(CC)" -fstack-protector-all )
72
73KBUILD_CFLAGS += $(cflags-y)
74CFLAGS_KERNEL += $(cflags-kernel-y)
75AFLAGS += -m64
76
77head-y := arch/x86/kernel/head_64.o arch/x86/kernel/head64.o arch/x86/kernel/init_task_64.o
78
79libs-y += arch/x86/lib/
80core-y += arch/x86/kernel/ \
81 arch/x86/mm/ \
82 arch/x86/crypto/ \
83 arch/x86/vdso/
84core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
85drivers-$(CONFIG_PCI) += arch/x86/pci/
86drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
87
88boot := arch/x86/boot
89
90PHONY += bzImage bzlilo install archmrproper \
91 fdimage fdimage144 fdimage288 isoimage archclean
92
93#Default target when executing "make"
94all: bzImage
95
96BOOTIMAGE := arch/x86/boot/bzImage
97KBUILD_IMAGE := $(BOOTIMAGE)
98
99bzImage: vmlinux
100 $(Q)mkdir -p $(objtree)/arch/x86_64/boot
101 $(Q)ln -fsn $(objtree)/arch/x86/boot/bzImage $(objtree)/arch/x86_64/boot/bzImage
102 $(Q)$(MAKE) $(build)=$(boot) $(BOOTIMAGE)
103
104bzlilo: vmlinux
105 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) zlilo
106
107bzdisk: vmlinux
108 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) zdisk
109
110fdimage fdimage144 fdimage288 isoimage: vmlinux
111 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) $@
112
113install:
114 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) $@
115
116archclean:
117 $(Q)rm -rf $(objtree)/arch/x86_64/boot
118 $(Q)$(MAKE) $(clean)=$(boot)
119
120define archhelp
121 echo '* bzImage - Compressed kernel image (arch/$(ARCH)/boot/bzImage)'
122 echo ' install - Install kernel using'
123 echo ' (your) ~/bin/installkernel or'
124 echo ' (distribution) /sbin/installkernel or'
125 echo ' install to $$(INSTALL_PATH) and run lilo'
126 echo ' bzdisk - Create a boot floppy in /dev/fd0'
127 echo ' fdimage - Create a boot floppy image'
128 echo ' isoimage - Create a boot CD-ROM image'
129endef
130
131CLEAN_FILES += arch/$(ARCH)/boot/fdimage \
132 arch/$(ARCH)/boot/image.iso \
133 arch/$(ARCH)/boot/mtools.conf
134
135
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