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 $
25 # early bootup linking needs 32bit. You can either use real 32bit tools
26 # here or 64bit tools in 32bit mode.
28 IA32_CC := $(CC) $(CPPFLAGS) -m32 -O2 -fomit-frame-pointer
29 IA32_LD := $(LD) -m elf_i386
30 IA32_AS := $(CC) $(AFLAGS) -m32 -Wa,--32 -traditional -c
31 IA32_OBJCOPY := $(CROSS_COMPILE)objcopy
32 IA32_CPP := $(CROSS_COMPILE)gcc -m32 -E
33 export IA32_CC IA32_LD IA32_AS IA32_OBJCOPY IA32_CPP
36 LDFLAGS := -m elf_x86_64
37 OBJCOPYFLAGS := -O binary -R .note -R .comment -S
38 LDFLAGS_vmlinux := -e stext
40 check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1 ; then echo "$(1)"; else echo "$(2)"; fi)
42 cflags-$(CONFIG_MK8) += $(call check_gcc,-march=k8,)
43 cflags-$(CONFIG_MPSC) += $(call check_gcc,-march=pentium4,)
46 CFLAGS += -mno-red-zone
47 CFLAGS += -mcmodel=kernel
49 # this makes reading assembly source easier, but produces worse code
50 # actually it makes the kernel smaller too.
51 CFLAGS += -fno-reorder-blocks
52 # should lower this a lot and see how much .text is saves
53 # CFLAGS += -finline-limit=2000
54 CFLAGS += -Wno-sign-compare
55 # don't enable this when you use kgdb:
56 ifneq ($(CONFIG_DEBUG_INFO),y)
57 CFLAGS += -fno-asynchronous-unwind-tables
60 # Enable unit-at-a-time mode when possible. It shrinks the
61 # kernel considerably.
62 CFLAGS += $(call check_gcc,-funit-at-a-time,)
64 head-y := arch/x86_64/kernel/head.o arch/x86_64/kernel/head64.o arch/x86_64/kernel/init_task.o
66 libs-y += arch/x86_64/lib/
67 core-y += arch/x86_64/kernel/ arch/x86_64/mm/
68 core-$(CONFIG_IA32_EMULATION) += arch/x86_64/ia32/
69 drivers-$(CONFIG_PCI) += arch/i386/pci/
70 drivers-$(CONFIG_OPROFILE) += arch/x86_64/oprofile/
72 boot := arch/x86_64/boot
74 .PHONY: bzImage bzlilo install archmrproper \
75 fdimage fdimage144 fdimage288 archclean
77 #Default target when executing "make"
80 BOOTIMAGE := arch/x86_64/boot/bzImage
83 $(Q)$(MAKE) $(build)=$(boot) $(BOOTIMAGE)
86 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) zlilo
89 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) zdisk
91 install fdimage fdimage144 fdimage288: vmlinux
92 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(BOOTIMAGE) $@
95 $(Q)$(MAKE) $(clean)=$(boot)
97 prepare: include/asm-$(ARCH)/offset.h
99 arch/$(ARCH)/kernel/asm-offsets.s: include/asm include/linux/version.h \
100 include/config/MARKER
102 include/asm-$(ARCH)/offset.h: arch/$(ARCH)/kernel/asm-offsets.s
103 $(call filechk,gen-asm-offsets)
105 CLEAN_FILES += include/asm-$(ARCH)/offset.h
108 echo '* bzImage - Compressed kernel image (arch/$(ARCH)/boot/bzImage)'
109 echo ' install - Install kernel using'
110 echo ' (your) ~/bin/installkernel or'
111 echo ' (distribution) /sbin/installkernel or'
112 echo ' install to $$(INSTALL_PATH) and run lilo'
115 CLEAN_FILES += arch/$(ARCH)/boot/fdimage arch/$(ARCH)/boot/mtools.conf