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Makefile：源码内容
							#
# arch/arm/Makefile
#
# This file is subject to the terms and conditions of the GNU General Public
# License.  See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1995-2001 by Russell King
LINKFLAGS	:=-p -X -T arch/arm/vmlinux.lds
GZFLAGS		:=-9
CFLAGS		+=-fno-common -pipe
ifeq ($(CONFIG_FRAME_POINTER),y)
CFLAGS		:=$(CFLAGS:-fomit-frame-pointer=-mapcs)
endif
CFLAGS		:=$(CFLAGS:-O2=-Os)
ifeq ($(CONFIG_DEBUG_INFO),y)
CFLAGS		+=-g
endif
# Select CPU dependent flags.  Note that order of declaration is important;
# the options further down the list override previous items.
#
# Note!  For APCS-26 YOU MUST HAVE AN APCS-26 LIBGCC.A
#
apcs-y				:=-mapcs-32
apcs-$(CONFIG_CPU_26)		:=-mapcs-26 -mcpu=arm3 -Os
# This selects which instruction set is used.
arch-y				:=
arch-$(CONFIG_CPU_32v3)		:=-march=armv3
arch-$(CONFIG_CPU_32v4)		:=-march=armv4
arch-$(CONFIG_CPU_32v5)		:=-march=armv5
arch-$(CONFIG_CPU_XSCALE)	:=-march=armv4 -Wa,#-mxscale #-march=armv5te
arch-$(CONFIG_CPU_XSCALE)	+=-specs=$(TOPDIR)/xscale.specs
# This selects how we optimise for the processor.
tune-y				:=
tune-$(CONFIG_CPU_ARM610)	:=-mtune=arm610
tune-$(CONFIG_CPU_ARM710)	:=-mtune=arm710
tune-$(CONFIG_CPU_ARM720T)	:=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM920T)	:=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM922T)	:=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM926T)	:=-mtune=arm9tdmi
tune-$(CONFIG_CPU_SA110)	:=-mtune=strongarm110
tune-$(CONFIG_CPU_SA1100)	:=-mtune=strongarm1100
tune-$(CONFIG_CPU_XSCALE)	:=-mtune=strongarm #-mtune=xscale
CFLAGS_BOOT	:=$(apcs-y) $(arch-y) $(tune-y) -mshort-load-bytes -msoft-float
CFLAGS		+=$(apcs-y) $(arch-y) $(tune-y) -mshort-load-bytes -msoft-float
AFLAGS		+=$(apcs-y) $(arch-y) -mno-fpu -msoft-float
ifeq ($(CONFIG_CPU_26),y)
PROCESSOR	 = armo
  ifeq ($(CONFIG_ROM_KERNEL),y)
    DATAADDR	 = 0x02080000
    TEXTADDR	 = 0x03800000
    LDSCRIPT	 = arch/arm/vmlinux-armo-rom.lds.in
  else
    TEXTADDR	 = 0x02080000
    LDSCRIPT	 = arch/arm/vmlinux-armo.lds.in
  endif
endif
ifeq ($(CONFIG_CPU_32),y)
PROCESSOR	 = armv
TEXTADDR	 = 0xC0008000
LDSCRIPT	 = arch/arm/vmlinux-armv.lds.in
endif
ifeq ($(CONFIG_ARCH_ARCA5K),y)
MACHINE		 = arc
endif
ifeq ($(CONFIG_ARCH_RPC),y)
MACHINE		 = rpc
endif
ifeq ($(CONFIG_ARCH_EBSA110),y)
MACHINE		 = ebsa110
CFLAGS_3c589_cs	:=-DISA_SIXTEEN_BIT_PERIPHERAL
export CFLAGS_3c589_cs
endif
ifeq ($(CONFIG_ARCH_CLPS7500),y)
MACHINE		 = clps7500
INCDIR		 = cl7500
endif
ifeq ($(CONFIG_FOOTBRIDGE),y)
MACHINE		 = footbridge
INCDIR		 = ebsa285
endif
ifeq ($(CONFIG_ARCH_CO285),y)
TEXTADDR	 = 0x60008000
MACHINE		 = footbridge
INCDIR		 = ebsa285
endif
ifeq ($(CONFIG_ARCH_FTVPCI),y)
MACHINE		 = ftvpci
INCDIR		 = nexuspci
endif
ifeq ($(CONFIG_ARCH_TBOX),y)
MACHINE		 = tbox
endif
ifeq ($(CONFIG_ARCH_SHARK),y)
MACHINE		 = shark
endif
ifeq ($(CONFIG_ARCH_SA1100),y)
ifeq ($(CONFIG_SA1111),y)
# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
TEXTADDR	 = 0xc0208000
endif
MACHINE		 = sa1100
endif
ifeq ($(CONFIG_ARCH_PXA),y)
MACHINE		 = pxa
endif
ifeq ($(CONFIG_ARCH_L7200),y)
MACHINE		 = l7200
endif
ifeq ($(CONFIG_ARCH_INTEGRATOR),y)
MACHINE		 = integrator
endif
ifeq ($(CONFIG_ARCH_MX1ADS),y)
MACHINE		 = mx1ads
endif
ifeq ($(CONFIG_ARCH_CAMELOT),y)
MACHINE          = epxa10db
endif
ifeq ($(CONFIG_ARCH_CLPS711X),y)
TEXTADDR	 = 0xc0028000
MACHINE		 = clps711x
endif
ifeq ($(CONFIG_ARCH_FORTUNET),y)
TEXTADDR	 = 0xc0208000
endif
ifeq ($(CONFIG_ARCH_ANAKIN),y)
MACHINE		 = anakin
endif
ifeq ($(CONFIG_ARCH_S3C2400),y)
TEXTADDR	 = 0xC0808000
MACHINE		 = s3c2400
endif
ifeq ($(CONFIG_ARCH_S3C2410),y)
TEXTADDR	 = 0xC0008000
MACHINE		 = s3c2410
endif
export	MACHINE PROCESSOR TEXTADDR GZFLAGS CFLAGS_BOOT
# Only set INCDIR if its not already defined above
# Grr, ?= doesn't work as all the other assignment operators do.  Make bug?
ifeq ($(origin INCDIR), undefined)
INCDIR		:= $(MACHINE)
endif
ifeq ($(origin DATAADDR), undefined)
DATAADDR	:= .
endif
# If we have a machine-specific directory, then include it in the build.
MACHDIR		:= arch/arm/mach-$(MACHINE)
ifeq ($(MACHDIR),$(wildcard $(MACHDIR)))
SUBDIRS		+= $(MACHDIR)
CORE_FILES	:= $(MACHDIR)/$(MACHINE).o $(CORE_FILES)
endif
HEAD		:= arch/arm/kernel/head-$(PROCESSOR).o 
		   arch/arm/kernel/init_task.o
SUBDIRS		+= arch/arm/kernel arch/arm/mm arch/arm/lib arch/arm/nwfpe
CORE_FILES	:= arch/arm/kernel/kernel.o arch/arm/mm/mm.o $(CORE_FILES)
LIBS		:= arch/arm/lib/lib.a $(LIBS)
ifeq ($(CONFIG_FPE_NWFPE),y)
LIBS		:= arch/arm/nwfpe/math-emu.o $(LIBS)
endif
# Only include fastfpe if it is part of the kernel tree.
FASTFPE		:= arch/arm/fastfpe
ifeq ($(FASTFPE),$(wildcard $(FASTFPE)))
SUBDIRS		+= $(FASTFPE)
ifeq ($(CONFIG_FPE_FASTFPE),y)
LIBS		:= arch/arm/fastfpe/fast-math-emu.o $(LIBS)
endif
endif
ifeq ($(findstring y,$(CONFIG_ARCH_CLPS7500) $(CONFIG_ARCH_L7200)),y)
SUBDIRS		+= drivers/acorn/char
DRIVERS		+= drivers/acorn/char/acorn-char.o
endif
MAKEBOOT	 = $(MAKE) -C arch/$(ARCH)/boot
MAKETOOLS	 = $(MAKE) -C arch/$(ARCH)/tools
# The following is a hack to get 'constants.h' up
# to date before starting compilation
$(patsubst %,_dir_%, $(SUBDIRS)): maketools
$(patsubst %,_modsubdir_%,$(MOD_DIRS)): maketools
symlinks: archsymlinks
archsymlinks:
	$(RM) include/asm-arm/arch include/asm-arm/proc
	(cd include/asm-arm; ln -sf arch-$(INCDIR) arch; ln -sf proc-$(PROCESSOR) proc)
vmlinux: arch/arm/vmlinux.lds
arch/arm/vmlinux.lds: $(LDSCRIPT) dummy
	@sed 's/TEXTADDR/$(TEXTADDR)/;s/DATAADDR/$(DATAADDR)/' $(LDSCRIPT) >$@
arch/arm/kernel arch/arm/mm arch/arm/lib: dummy
	$(MAKE) CFLAGS="$(CFLAGS) $(CFLAGS_KERNEL)" $(subst $@, _dir_$@, $@)
bzImage zImage zinstall Image bootpImage install: vmlinux
	@$(MAKEBOOT) $@
CLEAN_FILES	+= 
	arch/arm/vmlinux.lds
MRPROPER_FILES	+= 
	arch/arm/tools/constants.h* 
	include/asm-arm/arch 
	include/asm-arm/proc 
	include/asm-arm/constants.h* 
	include/asm-arm/mach-types.h
# We use MRPROPER_FILES and CLEAN_FILES now
archmrproper:
	@/bin/true
archclean:
	@$(MAKEBOOT) clean
archdep: scripts/mkdep archsymlinks
	@$(MAKETOOLS) dep
	@$(MAKEBOOT) dep
# we need version.h
maketools: checkbin include/linux/version.h
	@$(MAKETOOLS) all
# Ensure this is ld "2.9.4" or later
NEW_LINKER	:= $(shell $(LD) --gc-sections --version >/dev/null 2>&1; echo $$?)
ifneq ($(NEW_LINKER),0)
checkbin:
	@echo '*** ${VERSION}.${PATCHLEVEL} kernels no longer build correctly with old versions of binutils.'
	@echo '*** Please upgrade your binutils to 2.9.5.'
	@false
else
checkbin:
	@true
endif
# My testing targets (that short circuit a few dependencies)
zImg:;	@$(MAKEBOOT) zImage
Img:;	@$(MAKEBOOT) Image
i:;	@$(MAKEBOOT) install
zi:;	@$(MAKEBOOT) zinstall
bp:;	@$(MAKEBOOT) bootpImage
#
# Configuration targets.  Use these to select a
# configuration for your architecture
%_config:
	@( 
	CFG=$(@:_config=); 
	if [ -f arch/arm/def-configs/$$CFG ]; then 
	  [ -f .config ] && mv -f .config .config.old; 
	  cp arch/arm/def-configs/$$CFG .config; 
	  echo "*** Default configuration for $$CFG installed"; 
	  echo "*** Next, you may run 'make oldconfig'"; 
	else 
	  echo "$$CFG does not exist"; 
	fi; 
	)

						