Linux 2.6.31.6
[linux/fpc-iii.git] / arch / x86 / Makefile
blob1b68659c41b4c4ce91a3ad7bee7aa8c532fc2168
1 # Unified Makefile for i386 and x86_64
3 # select defconfig based on actual architecture
4 ifeq ($(ARCH),x86)
5 KBUILD_DEFCONFIG := i386_defconfig
6 else
7 KBUILD_DEFCONFIG := $(ARCH)_defconfig
8 endif
10 # BITS is used as extension for files which are available in a 32 bit
11 # and a 64 bit version to simplify shared Makefiles.
12 # e.g.: obj-y += foo_$(BITS).o
13 export BITS
15 ifeq ($(CONFIG_X86_32),y)
16 BITS := 32
17 UTS_MACHINE := i386
18 CHECKFLAGS += -D__i386__
20 biarch := $(call cc-option,-m32)
21 KBUILD_AFLAGS += $(biarch)
22 KBUILD_CFLAGS += $(biarch)
24 ifdef CONFIG_RELOCATABLE
25 LDFLAGS_vmlinux := --emit-relocs
26 endif
28 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
30 # prevent gcc from keeping the stack 16 byte aligned
31 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
33 # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
34 # a lot more stack due to the lack of sharing of stacklots:
35 KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
36 echo $(call cc-option,-fno-unit-at-a-time); fi ;)
38 # CPU-specific tuning. Anything which can be shared with UML should go here.
39 include $(srctree)/arch/x86/Makefile_32.cpu
40 KBUILD_CFLAGS += $(cflags-y)
42 # temporary until string.h is fixed
43 KBUILD_CFLAGS += -ffreestanding
44 else
45 BITS := 64
46 UTS_MACHINE := x86_64
47 CHECKFLAGS += -D__x86_64__ -m64
49 KBUILD_AFLAGS += -m64
50 KBUILD_CFLAGS += -m64
52 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
53 cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
54 cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
56 cflags-$(CONFIG_MCORE2) += \
57 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
58 cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
59 KBUILD_CFLAGS += $(cflags-y)
61 KBUILD_CFLAGS += -mno-red-zone
62 KBUILD_CFLAGS += -mcmodel=kernel
64 # -funit-at-a-time shrinks the kernel .text considerably
65 # unfortunately it makes reading oopses harder.
66 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
68 # this works around some issues with generating unwind tables in older gccs
69 # newer gccs do it by default
70 KBUILD_CFLAGS += -maccumulate-outgoing-args
71 endif
73 ifdef CONFIG_CC_STACKPROTECTOR
74 cc_has_sp := $(srctree)/scripts/gcc-x86_$(BITS)-has-stack-protector.sh
75 ifeq ($(shell $(CONFIG_SHELL) $(cc_has_sp) $(CC)),y)
76 stackp-y := -fstack-protector
77 stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += -fstack-protector-all
78 KBUILD_CFLAGS += $(stackp-y)
79 else
80 $(warning stack protector enabled but no compiler support)
81 endif
82 endif
84 # Don't unroll struct assignments with kmemcheck enabled
85 ifeq ($(CONFIG_KMEMCHECK),y)
86 KBUILD_CFLAGS += $(call cc-option,-fno-builtin-memcpy)
87 endif
89 # Stackpointer is addressed different for 32 bit and 64 bit x86
90 sp-$(CONFIG_X86_32) := esp
91 sp-$(CONFIG_X86_64) := rsp
93 # do binutils support CFI?
94 cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
95 # is .cfi_signal_frame supported too?
96 cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
97 KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
98 KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
100 LDFLAGS := -m elf_$(UTS_MACHINE)
102 # Speed up the build
103 KBUILD_CFLAGS += -pipe
104 # Workaround for a gcc prelease that unfortunately was shipped in a suse release
105 KBUILD_CFLAGS += -Wno-sign-compare
107 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
108 # prevent gcc from generating any FP code by mistake
109 KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
111 KBUILD_CFLAGS += $(mflags-y)
112 KBUILD_AFLAGS += $(mflags-y)
115 # Kernel objects
117 head-y := arch/x86/kernel/head_$(BITS).o
118 head-y += arch/x86/kernel/head$(BITS).o
119 head-y += arch/x86/kernel/head.o
120 head-y += arch/x86/kernel/init_task.o
122 libs-y += arch/x86/lib/
124 # See arch/x86/Kbuild for content of core part of the kernel
125 core-y += arch/x86/
127 # drivers-y are linked after core-y
128 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
129 drivers-$(CONFIG_PCI) += arch/x86/pci/
131 # must be linked after kernel/
132 drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
134 # suspend and hibernation support
135 drivers-$(CONFIG_PM) += arch/x86/power/
137 ifeq ($(CONFIG_X86_32),y)
138 drivers-$(CONFIG_FB) += arch/x86/video/
139 endif
141 ####
142 # boot loader support. Several targets are kept for legacy purposes
144 boot := arch/x86/boot
146 BOOT_TARGETS = bzlilo bzdisk fdimage fdimage144 fdimage288 isoimage
148 PHONY += bzImage $(BOOT_TARGETS)
150 # Default kernel to build
151 all: bzImage
153 # KBUILD_IMAGE specify target image being built
154 KBUILD_IMAGE := $(boot)/bzImage
156 bzImage: vmlinux
157 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
158 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
159 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
161 $(BOOT_TARGETS): vmlinux
162 $(Q)$(MAKE) $(build)=$(boot) $@
164 PHONY += install
165 install:
166 $(Q)$(MAKE) $(build)=$(boot) $@
168 PHONY += vdso_install
169 vdso_install:
170 $(Q)$(MAKE) $(build)=arch/x86/vdso $@
172 archclean:
173 $(Q)rm -rf $(objtree)/arch/i386
174 $(Q)rm -rf $(objtree)/arch/x86_64
175 $(Q)$(MAKE) $(clean)=$(boot)
177 define archhelp
178 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
179 echo ' install - Install kernel using'
180 echo ' (your) ~/bin/installkernel or'
181 echo ' (distribution) /sbin/installkernel or'
182 echo ' install to $$(INSTALL_PATH) and run lilo'
183 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
184 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
185 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
186 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
187 echo ' bzdisk/fdimage*/isoimage also accept:'
188 echo ' FDARGS="..." arguments for the booted kernel'
189 echo ' FDINITRD=file initrd for the booted kernel'
190 endef