kbuild: enable 'make AFLAGS=...' to add additional options to AS
[linux-3.10.git] / arch / i386 / Makefile
1 #
2 # i386/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" cleaning up for this architecture.
7 #
8 # This file is subject to the terms and conditions of the GNU General Public
9 # License.  See the file "COPYING" in the main directory of this archive
10 # for more details.
11 #
12 # Copyright (C) 1994 by Linus Torvalds
13 #
14 # 19990713  Artur Skawina <skawina@geocities.com>
15 #           Added '-march' and '-mpreferred-stack-boundary' support
16 #
17 # 20050320  Kianusch Sayah Karadji <kianusch@sk-tech.net>
18 #           Added support for GEODE CPU
19
20 # Fill in SRCARCH
21 SRCARCH := x86
22
23 HAS_BIARCH      := $(call cc-option-yn, -m32)
24 ifeq ($(HAS_BIARCH),y)
25 AS              := $(AS) --32
26 LD              := $(LD) -m elf_i386
27 CC              := $(CC) -m32
28 endif
29
30 LDFLAGS         := -m elf_i386
31 OBJCOPYFLAGS    := -O binary -R .note -R .comment -S
32 ifdef CONFIG_RELOCATABLE
33 LDFLAGS_vmlinux := --emit-relocs
34 endif
35 CHECKFLAGS      += -D__i386__
36
37 KBUILD_CFLAGS += -pipe -msoft-float -mregparm=3 -freg-struct-return
38
39 # prevent gcc from keeping the stack 16 byte aligned
40 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
41
42 # CPU-specific tuning. Anything which can be shared with UML should go here.
43 include $(srctree)/arch/i386/Makefile.cpu
44
45 # temporary until string.h is fixed
46 cflags-y += -ffreestanding
47
48 # this works around some issues with generating unwind tables in older gccs
49 # newer gccs do it by default
50 cflags-y += -maccumulate-outgoing-args
51
52 # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
53 # a lot more stack due to the lack of sharing of stacklots:
54 KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then echo $(call cc-option,-fno-unit-at-a-time); fi ;)
55
56 # do binutils support CFI?
57 cflags-y += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
58 KBUILD_AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_rel_offset esp${comma}0\n.cfi_endproc,-DCONFIG_AS_CFI=1,)
59
60 # is .cfi_signal_frame supported too?
61 cflags-y += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
62 KBUILD_AFLAGS += $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1,)
63
64 KBUILD_CFLAGS += $(cflags-y)
65
66 # Default subarch .c files
67 mcore-y  := arch/x86/mach-default
68
69 # Voyager subarch support
70 mflags-$(CONFIG_X86_VOYAGER)    := -Iinclude/asm-x86/mach-voyager
71 mcore-$(CONFIG_X86_VOYAGER)     := arch/x86/mach-voyager
72
73 # VISWS subarch support
74 mflags-$(CONFIG_X86_VISWS)      := -Iinclude/asm-x86/mach-visws
75 mcore-$(CONFIG_X86_VISWS)       := arch/x86/mach-visws
76
77 # NUMAQ subarch support
78 mflags-$(CONFIG_X86_NUMAQ)      := -Iinclude/asm-x86/mach-numaq
79 mcore-$(CONFIG_X86_NUMAQ)       := arch/x86/mach-default
80
81 # BIGSMP subarch support
82 mflags-$(CONFIG_X86_BIGSMP)     := -Iinclude/asm-x86/mach-bigsmp
83 mcore-$(CONFIG_X86_BIGSMP)      := arch/x86/mach-default
84
85 #Summit subarch support
86 mflags-$(CONFIG_X86_SUMMIT) := -Iinclude/asm-x86/mach-summit
87 mcore-$(CONFIG_X86_SUMMIT)  := arch/x86/mach-default
88
89 # generic subarchitecture
90 mflags-$(CONFIG_X86_GENERICARCH) := -Iinclude/asm-x86/mach-generic
91 mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default
92 core-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
93
94 # ES7000 subarch support
95 mflags-$(CONFIG_X86_ES7000)     := -Iinclude/asm-x86/mach-es7000
96 mcore-$(CONFIG_X86_ES7000)      := arch/x86/mach-default
97 core-$(CONFIG_X86_ES7000)       := arch/x86/mach-es7000/
98
99 # Xen paravirtualization support
100 core-$(CONFIG_XEN)              += arch/x86/xen/
101
102 # default subarch .h files
103 mflags-y += -Iinclude/asm-x86/mach-default
104
105 head-y := arch/x86/kernel/head_32.o arch/x86/kernel/init_task_32.o
106
107 libs-y                                  += arch/x86/lib/
108 core-y                                  += arch/x86/kernel/ \
109                                            arch/x86/mm/ \
110                                            $(mcore-y)/ \
111                                            arch/x86/crypto/
112 drivers-$(CONFIG_MATH_EMULATION)        += arch/x86/math-emu/
113 drivers-$(CONFIG_PCI)                   += arch/x86/pci/
114 # must be linked after kernel/
115 drivers-$(CONFIG_OPROFILE)              += arch/x86/oprofile/
116 drivers-$(CONFIG_PM)                    += arch/x86/power/
117 drivers-$(CONFIG_FB)                    += arch/x86/video/
118
119 KBUILD_CFLAGS += $(mflags-y)
120 KBUILD_AFLAGS += $(mflags-y)
121
122 boot := arch/x86/boot
123
124 PHONY += zImage bzImage compressed zlilo bzlilo \
125          zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
126
127 all: bzImage
128
129 # KBUILD_IMAGE specify target image being built
130                     KBUILD_IMAGE := $(boot)/bzImage
131 zImage zlilo zdisk: KBUILD_IMAGE := arch/x86/boot/zImage
132
133 zImage bzImage: vmlinux
134         $(Q)mkdir -p $(objtree)/arch/i386/boot
135         $(Q)ln -fsn $(objtree)/arch/x86/boot/bzImage $(objtree)/arch/i386/boot/bzImage
136         $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
137
138 compressed: zImage
139
140 zlilo bzlilo: vmlinux
141         $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
142
143 zdisk bzdisk: vmlinux
144         $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
145
146 fdimage fdimage144 fdimage288 isoimage: vmlinux
147         $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
148
149 install:
150         $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
151
152 archclean:
153         $(Q)rm -rf $(objtree)/arch/i386/boot
154         $(Q)$(MAKE) $(clean)=arch/x86/boot
155
156 define archhelp
157   echo  '* bzImage      - Compressed kernel image (arch/$(ARCH)/boot/bzImage)'
158   echo  '  install      - Install kernel using'
159   echo  '                  (your) ~/bin/installkernel or'
160   echo  '                  (distribution) /sbin/installkernel or'
161   echo  '                  install to $$(INSTALL_PATH) and run lilo'
162   echo  '  bzdisk       - Create a boot floppy in /dev/fd0'
163   echo  '  fdimage      - Create a boot floppy image'
164   echo  '  isoimage     - Create a boot CD-ROM image'
165 endef
166
167 CLEAN_FILES += arch/$(ARCH)/boot/fdimage \
168                arch/$(ARCH)/boot/image.iso \
169                arch/$(ARCH)/boot/mtools.conf