airport: remove useless return in a function returning void
[linux/fpc-iii.git] / arch / x86 / Makefile
blobd1a47adb5aec0b14cfd6b52297be80f87fbf0682
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 := $(ARCH)_defconfig
8 endif
10 core-$(CONFIG_KVM) += arch/x86/kvm/
12 # BITS is used as extension for files which are available in a 32 bit
13 # and a 64 bit version to simplify shared Makefiles.
14 # e.g.: obj-y += foo_$(BITS).o
15 export BITS
17 ifeq ($(CONFIG_X86_32),y)
18 BITS := 32
19 UTS_MACHINE := i386
20 CHECKFLAGS += -D__i386__
22 biarch := $(call cc-option,-m32)
23 KBUILD_AFLAGS += $(biarch)
24 KBUILD_CFLAGS += $(biarch)
26 ifdef CONFIG_RELOCATABLE
27 LDFLAGS_vmlinux := --emit-relocs
28 endif
30 KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
32 # prevent gcc from keeping the stack 16 byte aligned
33 KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=2)
35 # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
36 # a lot more stack due to the lack of sharing of stacklots:
37 KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
38 echo $(call cc-option,-fno-unit-at-a-time); fi ;)
40 # CPU-specific tuning. Anything which can be shared with UML should go here.
41 include $(srctree)/arch/x86/Makefile_32.cpu
42 KBUILD_CFLAGS += $(cflags-y)
44 # temporary until string.h is fixed
45 KBUILD_CFLAGS += -ffreestanding
46 else
47 BITS := 64
48 UTS_MACHINE := x86_64
49 CHECKFLAGS += -D__x86_64__ -m64
51 KBUILD_AFLAGS += -m64
52 KBUILD_CFLAGS += -m64
54 # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
55 cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
56 cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
58 cflags-$(CONFIG_MCORE2) += \
59 $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
60 cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
61 KBUILD_CFLAGS += $(cflags-y)
63 KBUILD_CFLAGS += -mno-red-zone
64 KBUILD_CFLAGS += -mcmodel=kernel
66 # -funit-at-a-time shrinks the kernel .text considerably
67 # unfortunately it makes reading oopses harder.
68 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
70 # this works around some issues with generating unwind tables in older gccs
71 # newer gccs do it by default
72 KBUILD_CFLAGS += -maccumulate-outgoing-args
74 stackp := $(CONFIG_SHELL) $(srctree)/scripts/gcc-x86_64-has-stack-protector.sh
75 stackp-$(CONFIG_CC_STACKPROTECTOR) := $(shell $(stackp) \
76 "$(CC)" -fstack-protector )
77 stackp-$(CONFIG_CC_STACKPROTECTOR_ALL) += $(shell $(stackp) \
78 "$(CC)" -fstack-protector-all )
80 KBUILD_CFLAGS += $(stackp-y)
81 endif
83 # Stackpointer is addressed different for 32 bit and 64 bit x86
84 sp-$(CONFIG_X86_32) := esp
85 sp-$(CONFIG_X86_64) := rsp
87 # do binutils support CFI?
88 cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1)
89 # is .cfi_signal_frame supported too?
90 cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
91 KBUILD_AFLAGS += $(cfi) $(cfi-sigframe)
92 KBUILD_CFLAGS += $(cfi) $(cfi-sigframe)
94 LDFLAGS := -m elf_$(UTS_MACHINE)
96 # Speed up the build
97 KBUILD_CFLAGS += -pipe
98 # Workaround for a gcc prelease that unfortunately was shipped in a suse release
99 KBUILD_CFLAGS += -Wno-sign-compare
101 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
102 # prevent gcc from generating any FP code by mistake
103 KBUILD_CFLAGS += $(call cc-option,-mno-sse -mno-mmx -mno-sse2 -mno-3dnow,)
106 # Sub architecture support
107 # fcore-y is linked before mcore-y files.
109 # Default subarch .c files
110 mcore-y := arch/x86/mach-default/
112 # Voyager subarch support
113 mflags-$(CONFIG_X86_VOYAGER) := -Iarch/x86/include/asm/mach-voyager
114 mcore-$(CONFIG_X86_VOYAGER) := arch/x86/mach-voyager/
116 # generic subarchitecture
117 mflags-$(CONFIG_X86_GENERICARCH):= -Iarch/x86/include/asm/mach-generic
118 fcore-$(CONFIG_X86_GENERICARCH) += arch/x86/mach-generic/
119 mcore-$(CONFIG_X86_GENERICARCH) := arch/x86/mach-default/
121 # default subarch .h files
122 mflags-y += -Iarch/x86/include/asm/mach-default
124 # 64 bit does not support subarch support - clear sub arch variables
125 fcore-$(CONFIG_X86_64) :=
126 mcore-$(CONFIG_X86_64) :=
128 KBUILD_CFLAGS += $(mflags-y)
129 KBUILD_AFLAGS += $(mflags-y)
132 # Kernel objects
134 head-y := arch/x86/kernel/head_$(BITS).o
135 head-y += arch/x86/kernel/head$(BITS).o
136 head-y += arch/x86/kernel/head.o
137 head-y += arch/x86/kernel/init_task.o
139 libs-y += arch/x86/lib/
141 # Sub architecture files that needs linking first
142 core-y += $(fcore-y)
144 # Xen paravirtualization support
145 core-$(CONFIG_XEN) += arch/x86/xen/
147 # lguest paravirtualization support
148 core-$(CONFIG_LGUEST_GUEST) += arch/x86/lguest/
150 core-y += arch/x86/kernel/
151 core-y += arch/x86/mm/
153 # Remaining sub architecture files
154 core-y += $(mcore-y)
156 core-y += arch/x86/crypto/
157 core-y += arch/x86/vdso/
158 core-$(CONFIG_IA32_EMULATION) += arch/x86/ia32/
160 # drivers-y are linked after core-y
161 drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
162 drivers-$(CONFIG_PCI) += arch/x86/pci/
164 # must be linked after kernel/
165 drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
167 # suspend and hibernation support
168 drivers-$(CONFIG_PM) += arch/x86/power/
170 ifeq ($(CONFIG_X86_32),y)
171 drivers-$(CONFIG_FB) += arch/x86/video/
172 endif
174 ####
175 # boot loader support. Several targets are kept for legacy purposes
177 boot := arch/x86/boot
179 PHONY += zImage bzImage compressed zlilo bzlilo \
180 zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
182 # Default kernel to build
183 all: bzImage
185 # KBUILD_IMAGE specify target image being built
186 KBUILD_IMAGE := $(boot)/bzImage
187 zImage zlilo zdisk: KBUILD_IMAGE := $(boot)/zImage
189 zImage bzImage: vmlinux
190 $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
191 $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
192 $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
194 compressed: zImage
196 zlilo bzlilo: vmlinux
197 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zlilo
199 zdisk bzdisk: vmlinux
200 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
202 fdimage fdimage144 fdimage288 isoimage: vmlinux
203 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
205 install:
206 $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
208 PHONY += vdso_install
209 vdso_install:
210 $(Q)$(MAKE) $(build)=arch/x86/vdso $@
212 archclean:
213 $(Q)rm -rf $(objtree)/arch/i386
214 $(Q)rm -rf $(objtree)/arch/x86_64
215 $(Q)$(MAKE) $(clean)=$(boot)
217 define archhelp
218 echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
219 echo ' install - Install kernel using'
220 echo ' (your) ~/bin/installkernel or'
221 echo ' (distribution) /sbin/installkernel or'
222 echo ' install to $$(INSTALL_PATH) and run lilo'
223 echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
224 echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
225 echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
226 echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
227 echo ' bzdisk/fdimage*/isoimage also accept:'
228 echo ' FDARGS="..." arguments for the booted kernel'
229 echo ' FDINITRD=file initrd for the booted kernel'
230 endef
232 CLEAN_FILES += arch/x86/boot/fdimage \
233 arch/x86/boot/image.iso \
234 arch/x86/boot/mtools.conf