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  • Uboot makefile 解读

    #
    # (C) Copyright 2000-2012
    # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
    #
    # See file CREDITS for list of people who contributed to this
    # project.
    #
    # This program is free software; you can redistribute it and/or
    # modify it under the terms of the GNU General Public License as
    # published by the Free Software Foundatio; either version 2 of
    # the License, or (at your option) any later version.
    #
    # This program is distributed in the hope that it will be useful,
    # but WITHOUT ANY WARRANTY; without even the implied warranty of
    # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.    See the
    # GNU General Public License for more details.
    #
    # You should have received a copy of the GNU General Public License
    # along with this program; if not, write to the Free Software
    # Foundation, Inc., 59 Temple Place, Suite 330, Boston,
    # MA 02111-1307 USA
    #
    
    VERSION = 2012
    PATCHLEVEL = 04
    SUBLEVEL = 01
    EXTRAVERSION =
    ifneq "$(SUBLEVEL)" ""
    U_BOOT_VERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
    else
    U_BOOT_VERSION = $(VERSION).$(PATCHLEVEL)$(EXTRAVERSION)
    endif
    TIMESTAMP_FILE = $(obj)include/generated/timestamp_autogenerated.h
    VERSION_FILE = $(obj)include/generated/version_autogenerated.h
    
    HOSTARCH := $(shell uname -m | 
        sed -e s/i.86/x86/ 
            -e s/sun4u/sparc64/ 
            -e s/arm.*/arm/ 
            -e s/sa110/arm/ 
            -e s/ppc64/powerpc/ 
            -e s/ppc/powerpc/ 
            -e s/macppc/powerpc/
            -e s/sh.*/sh/)
    
    HOSTOS := $(shell uname -s | tr '[:upper:]' '[:lower:]' | 
            sed -e 's/(cygwin).*/cygwin/')
    
    # Set shell to bash if possible, otherwise fall back to sh
    SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; 
        else if [ -x /bin/bash ]; then echo /bin/bash; 
        else echo sh; fi; fi)
    
    export    HOSTARCH HOSTOS SHELL
    
    # Deal with colliding definitions from tcsh etc.
    VENDOR=
    
    #########################################################################
    # Allow for silent builds
    ifeq (,$(findstring s,$(MAKEFLAGS)))
    XECHO = echo
    else
    XECHO = :
    endif
    
    #########################################################################
    #
    # U-boot build supports producing a object files to the separate external
    # directory. Two use cases are supported:
    #
    # 1) Add O= to the make command line
    # 'make O=/tmp/build all'
    #
    # 2) Set environement variable BUILD_DIR to point to the desired location
    # 'export BUILD_DIR=/tmp/build'
    # 'make'
    #
    # The second approach can also be used with a MAKEALL script
    # 'export BUILD_DIR=/tmp/build'
    # './MAKEALL'
    #
    # Command line 'O=' setting overrides BUILD_DIR environent variable.
    #
    # When none of the above methods is used the local build is performed and
    # the object files are placed in the source directory.
    #
    
    ifdef O
    ifeq ("$(origin O)", "command line")
    BUILD_DIR := $(O)
    endif
    endif
    
    ifneq ($(BUILD_DIR),)
    saved-output := $(BUILD_DIR)
    
    # Attempt to create a output directory.
    $(shell [ -d ${BUILD_DIR} ] || mkdir -p ${BUILD_DIR})
    
    # Verify if it was successful.
    BUILD_DIR := $(shell cd $(BUILD_DIR) && /bin/pwd)
    $(if $(BUILD_DIR),,$(error output directory "$(saved-output)" does not exist))
    endif # ifneq ($(BUILD_DIR),)
    
    OBJTREE        := $(if $(BUILD_DIR),$(BUILD_DIR),$(CURDIR))
    SPLTREE        := $(OBJTREE)/spl
    SRCTREE        := $(CURDIR)
    TOPDIR        := $(SRCTREE)
    LNDIR        := $(OBJTREE)
    export    TOPDIR SRCTREE OBJTREE SPLTREE
    
    MKCONFIG    := $(SRCTREE)/mkconfig
    export MKCONFIG
    
    ifneq ($(OBJTREE),$(SRCTREE))
    REMOTE_BUILD    := 1
    export REMOTE_BUILD
    endif
    
    # $(obj) and (src) are defined in config.mk but here in main Makefile
    # we also need them before config.mk is included which is the case for
    # some targets like unconfig, clean, clobber, distclean, etc.
    ifneq ($(OBJTREE),$(SRCTREE))
    obj := $(OBJTREE)/
    src := $(SRCTREE)/
    else
    obj :=
    src :=
    endif
    export obj src
    
    # Make sure CDPATH settings don't interfere
    unexport CDPATH
    
    #########################################################################
    
    # The "tools" are needed early, so put this first
    # Don't include stuff already done in $(LIBS)
    # The "examples" conditionally depend on U-Boot (say, when USE_PRIVATE_LIBGCC
    # is "yes"), so compile examples after U-Boot is compiled.
    SUBDIR_TOOLS = tools
    SUBDIR_EXAMPLES = examples/standalone examples/api
    SUBDIRS = $(SUBDIR_TOOLS)
    
    .PHONY : $(SUBDIRS) $(VERSION_FILE) $(TIMESTAMP_FILE)
    
    ifeq ($(obj)include/config.mk,$(wildcard $(obj)include/config.mk))
    
    # Include autoconf.mk before config.mk so that the config options are available
    # to all top level build files.  We need the dummy all: target to prevent the
    # dependency target in autoconf.mk.dep from being the default.
    all:
    sinclude $(obj)include/autoconf.mk.dep
    sinclude $(obj)include/autoconf.mk
    
    ifndef CONFIG_SANDBOX
    SUBDIRS += $(SUBDIR_EXAMPLES)
    endif
    
    # load ARCH, BOARD, and CPU configuration
    include $(obj)include/config.mk
    export    ARCH CPU BOARD VENDOR SOC
    
    # set default to nothing for native builds
    ifeq ($(HOSTARCH),$(ARCH))
    CROSS_COMPILE ?=
    endif
    
    # load other configuration
    include $(TOPDIR)/config.mk
    
    # If board code explicitly specified LDSCRIPT or CONFIG_SYS_LDSCRIPT, use
    # that (or fail if absent).  Otherwise, search for a linker script in a
    # standard location.
    
    LDSCRIPT_MAKEFILE_DIR = $(dir $(LDSCRIPT))
    
    ifndef LDSCRIPT
        #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
        ifdef CONFIG_SYS_LDSCRIPT
            # need to strip off double quotes
            LDSCRIPT := $(subst ",,$(CONFIG_SYS_LDSCRIPT))
        endif
    endif
    
    # If there is no specified link script, we look in a number of places for it
    ifndef LDSCRIPT
        ifeq ($(CONFIG_NAND_U_BOOT),y)
            LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
            ifeq ($(wildcard $(LDSCRIPT)),)
                LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot-nand.lds
            endif
        endif
        ifeq ($(wildcard $(LDSCRIPT)),)
            LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
        endif
        ifeq ($(wildcard $(LDSCRIPT)),)
            LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot.lds
        endif
        ifeq ($(wildcard $(LDSCRIPT)),)
            LDSCRIPT := $(TOPDIR)/arch/$(ARCH)/cpu/u-boot.lds
            # We don't expect a Makefile here
            LDSCRIPT_MAKEFILE_DIR =
        endif
        ifeq ($(wildcard $(LDSCRIPT)),)
    $(error could not find linker script)
        endif
    endif
    
    #########################################################################
    # U-Boot objects....order is important (i.e. start must be first)
    
    OBJS  = $(CPUDIR)/start.o
    ifeq ($(CPU),x86)
    OBJS += $(CPUDIR)/start16.o
    OBJS += $(CPUDIR)/resetvec.o
    endif
    ifeq ($(CPU),ppc4xx)
    OBJS += $(CPUDIR)/resetvec.o
    endif
    ifeq ($(CPU),mpc85xx)
    OBJS += $(CPUDIR)/resetvec.o
    endif
    
    OBJS := $(addprefix $(obj),$(OBJS))
    
    LIBS  = lib/libgeneric.o
    LIBS += lib/lzma/liblzma.o
    LIBS += lib/lzo/liblzo.o
    LIBS += lib/zlib/libz.o
    LIBS += $(shell if [ -f board/$(VENDOR)/common/Makefile ]; then echo 
        "board/$(VENDOR)/common/lib$(VENDOR).o"; fi)
    LIBS += $(CPUDIR)/lib$(CPU).o
    ifdef SOC
    LIBS += $(CPUDIR)/$(SOC)/lib$(SOC).o
    endif
    ifeq ($(CPU),ixp)
    LIBS += arch/arm/cpu/ixp/npe/libnpe.o
    endif
    ifeq ($(CONFIG_OF_EMBED),y)
    LIBS += dts/libdts.o
    endif
    LIBS += arch/$(ARCH)/lib/lib$(ARCH).o
    LIBS += fs/cramfs/libcramfs.o fs/fat/libfat.o fs/fdos/libfdos.o fs/jffs2/libjffs2.o 
        fs/reiserfs/libreiserfs.o fs/ext2/libext2fs.o fs/yaffs2/libyaffs2.o 
        fs/ubifs/libubifs.o
    LIBS += net/libnet.o
    LIBS += disk/libdisk.o
    LIBS += drivers/bios_emulator/libatibiosemu.o
    LIBS += drivers/block/libblock.o
    LIBS += drivers/dma/libdma.o
    LIBS += drivers/fpga/libfpga.o
    LIBS += drivers/gpio/libgpio.o
    LIBS += drivers/hwmon/libhwmon.o
    LIBS += drivers/i2c/libi2c.o
    LIBS += drivers/input/libinput.o
    LIBS += drivers/misc/libmisc.o
    LIBS += drivers/mmc/libmmc.o
    LIBS += drivers/mtd/libmtd.o
    LIBS += drivers/mtd/nand/libnand.o
    LIBS += drivers/mtd/onenand/libonenand.o
    LIBS += drivers/mtd/ubi/libubi.o
    LIBS += drivers/mtd/spi/libspi_flash.o
    LIBS += drivers/net/libnet.o
    LIBS += drivers/net/phy/libphy.o
    LIBS += drivers/pci/libpci.o
    LIBS += drivers/pcmcia/libpcmcia.o
    LIBS += drivers/power/libpower.o
    LIBS += drivers/spi/libspi.o
    ifeq ($(CPU),mpc83xx)
    LIBS += drivers/qe/libqe.o
    LIBS += arch/powerpc/cpu/mpc8xxx/ddr/libddr.o
    LIBS += arch/powerpc/cpu/mpc8xxx/lib8xxx.o
    endif
    ifeq ($(CPU),mpc85xx)
    LIBS += drivers/qe/libqe.o
    LIBS += drivers/net/fm/libfm.o
    LIBS += arch/powerpc/cpu/mpc8xxx/ddr/libddr.o
    LIBS += arch/powerpc/cpu/mpc8xxx/lib8xxx.o
    endif
    ifeq ($(CPU),mpc86xx)
    LIBS += arch/powerpc/cpu/mpc8xxx/ddr/libddr.o
    LIBS += arch/powerpc/cpu/mpc8xxx/lib8xxx.o
    endif
    LIBS += drivers/rtc/librtc.o
    LIBS += drivers/serial/libserial.o
    ifeq ($(CONFIG_GENERIC_LPC_TPM),y)
    LIBS += drivers/tpm/libtpm.o
    endif
    LIBS += drivers/twserial/libtws.o
    LIBS += drivers/usb/eth/libusb_eth.o
    LIBS += drivers/usb/gadget/libusb_gadget.o
    LIBS += drivers/usb/host/libusb_host.o
    LIBS += drivers/usb/musb/libusb_musb.o
    LIBS += drivers/usb/phy/libusb_phy.o
    LIBS += drivers/usb/ulpi/libusb_ulpi.o
    LIBS += drivers/video/libvideo.o
    LIBS += drivers/watchdog/libwatchdog.o
    LIBS += common/libcommon.o
    LIBS += lib/libfdt/libfdt.o
    LIBS += api/libapi.o
    LIBS += post/libpost.o
    
    ifneq ($(CONFIG_AM33XX)$(CONFIG_OMAP34XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX),)
    LIBS += $(CPUDIR)/omap-common/libomap-common.o
    endif
    
    ifeq ($(SOC),mx5)
    LIBS += $(CPUDIR)/imx-common/libimx-common.o
    endif
    ifeq ($(SOC),mx6)
    LIBS += $(CPUDIR)/imx-common/libimx-common.o
    endif
    
    ifeq ($(SOC),s5pc1xx)
    LIBS += $(CPUDIR)/s5p-common/libs5p-common.o
    endif
    ifeq ($(SOC),exynos)
    LIBS += $(CPUDIR)/s5p-common/libs5p-common.o
    endif
    
    LIBS := $(addprefix $(obj),$(sort $(LIBS)))
    .PHONY : $(LIBS)
    
    LIBBOARD = board/$(BOARDDIR)/lib$(BOARD).o
    LIBBOARD := $(addprefix $(obj),$(LIBBOARD))
    
    # Add GCC lib
    ifdef USE_PRIVATE_LIBGCC
    ifeq ("$(USE_PRIVATE_LIBGCC)", "yes")
    PLATFORM_LIBGCC = $(OBJTREE)/arch/$(ARCH)/lib/libgcc.o
    else
    PLATFORM_LIBGCC = -L $(USE_PRIVATE_LIBGCC) -lgcc
    endif
    else
    PLATFORM_LIBGCC := -L $(shell dirname `$(CC) $(CFLAGS) -print-libgcc-file-name`) -lgcc
    endif
    PLATFORM_LIBS += $(PLATFORM_LIBGCC)
    export PLATFORM_LIBS
    
    # Special flags for CPP when processing the linker script.
    # Pass the version down so we can handle backwards compatibility
    # on the fly.
    LDPPFLAGS += 
        -include $(TOPDIR)/include/u-boot/u-boot.lds.h 
        -DCPUDIR=$(CPUDIR) 
        $(shell $(LD) --version | 
          sed -ne 's/GNU ld version ([0-9][0-9]*).([0-9][0-9]*).*/-DLD_MAJOR=1 -DLD_MINOR=2/p')
    
    __OBJS := $(subst $(obj),,$(OBJS))
    __LIBS := $(subst $(obj),,$(LIBS)) $(subst $(obj),,$(LIBBOARD))
    
    #########################################################################
    #########################################################################
    
    ifneq ($(CONFIG_BOARD_SIZE_LIMIT),)
    BOARD_SIZE_CHECK = 
        @actual=`wc -c $@ | awk '{print $$1}'`; 
        limit=$(CONFIG_BOARD_SIZE_LIMIT); 
        if test $$actual -gt $$limit; then 
            echo "$@ exceeds file size limit:"; 
            echo "  limit:  $$limit bytes"; 
            echo "  actual: $$actual bytes"; 
            echo "  excess: $$((actual - limit)) bytes"; 
            exit 1; 
        fi
    else
    BOARD_SIZE_CHECK =
    endif
    
    # Always append ALL so that arch config.mk's can add custom ones
    ALL-y += $(obj)u-boot.srec $(obj)u-boot.bin $(obj)System.map
    
    ALL-$(CONFIG_NAND_U_BOOT) += $(obj)u-boot-nand.bin
    ALL-$(CONFIG_ONENAND_U_BOOT) += $(obj)u-boot-onenand.bin
    ONENAND_BIN ?= $(obj)onenand_ipl/onenand-ipl-2k.bin
    ALL-$(CONFIG_SPL) += $(obj)spl/u-boot-spl.bin
    ALL-$(CONFIG_OF_SEPARATE) += $(obj)u-boot.dtb $(obj)u-boot-dtb.bin
    
    all:        $(ALL-y) $(SUBDIR_EXAMPLES)
    
    $(obj)u-boot.dtb:    $(obj)u-boot
            $(MAKE) -C dts binary
            mv $(obj)dts/dt.dtb $@
    
    $(obj)u-boot-dtb.bin:    $(obj)u-boot.bin $(obj)u-boot.dtb
            cat $^ >$@
    
    $(obj)u-boot.hex:    $(obj)u-boot
            $(OBJCOPY) ${OBJCFLAGS} -O ihex $< $@
    
    $(obj)u-boot.srec:    $(obj)u-boot
            $(OBJCOPY) -O srec $< $@
    
    $(obj)u-boot.bin:    $(obj)u-boot
            $(OBJCOPY) ${OBJCFLAGS} -O binary $< $@
            $(BOARD_SIZE_CHECK)
    
    $(obj)u-boot.ldr:    $(obj)u-boot
            $(CREATE_LDR_ENV)
            $(LDR) -T $(CONFIG_BFIN_CPU) -c $@ $< $(LDR_FLAGS)
            $(BOARD_SIZE_CHECK)
    
    $(obj)u-boot.ldr.hex:    $(obj)u-boot.ldr
            $(OBJCOPY) ${OBJCFLAGS} -O ihex $< $@ -I binary
    
    $(obj)u-boot.ldr.srec:    $(obj)u-boot.ldr
            $(OBJCOPY) ${OBJCFLAGS} -O srec $< $@ -I binary
    
    $(obj)u-boot.img:    $(obj)u-boot.bin
            $(obj)tools/mkimage -A $(ARCH) -T firmware -C none 
            -O u-boot -a $(CONFIG_SYS_TEXT_BASE) -e 0 
            -n $(shell sed -n -e 's/.*U_BOOT_VERSION//p' $(VERSION_FILE) | 
                sed -e 's/"[     ]*$$/ for $(BOARD) board"/') 
            -d $< $@
    
    $(obj)u-boot.imx:       $(obj)u-boot.bin
            $(obj)tools/mkimage -n  $(CONFIG_IMX_CONFIG) -T imximage 
            -e $(CONFIG_SYS_TEXT_BASE) -d $< $@
    
    $(obj)u-boot.kwb:       $(obj)u-boot.bin
            $(obj)tools/mkimage -n $(CONFIG_SYS_KWD_CONFIG) -T kwbimage 
            -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) -d $< $@
    
    $(obj)u-boot.sha1:    $(obj)u-boot.bin
            $(obj)tools/ubsha1 $(obj)u-boot.bin
    
    $(obj)u-boot.dis:    $(obj)u-boot
            $(OBJDUMP) -d $< > $@
    
    $(obj)u-boot.ubl:       $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
            $(OBJCOPY) ${OBJCFLAGS} --pad-to=$(PAD_TO) -O binary $(obj)spl/u-boot-spl $(obj)spl/u-boot-spl-pad.bin
            cat $(obj)spl/u-boot-spl-pad.bin $(obj)u-boot.bin > $(obj)u-boot-ubl.bin
            $(obj)tools/mkimage -n $(UBL_CONFIG) -T ublimage 
            -e $(CONFIG_SYS_TEXT_BASE) -d $(obj)u-boot-ubl.bin $(obj)u-boot.ubl
            rm $(obj)u-boot-ubl.bin
            rm $(obj)spl/u-boot-spl-pad.bin
    
    $(obj)u-boot.ais:       $(obj)spl/u-boot-spl.bin $(obj)u-boot.bin
            $(obj)tools/mkimage -s -n /dev/null -T aisimage 
                -e $(CONFIG_SPL_TEXT_BASE) 
                -d $(obj)spl/u-boot-spl.bin 
                $(obj)spl/u-boot-spl.ais
            $(OBJCOPY) ${OBJCFLAGS} -I binary 
                --pad-to=$(CONFIG_SPL_MAX_SIZE) -O binary 
                $(obj)spl/u-boot-spl.ais $(obj)spl/u-boot-spl-pad.ais
            cat $(obj)spl/u-boot-spl-pad.ais $(obj)u-boot.bin > 
                $(obj)u-boot.ais
            rm $(obj)spl/u-boot-spl{,-pad}.ais
    
    $(obj)u-boot.sb:       $(obj)u-boot.bin $(obj)spl/u-boot-spl.bin
            elftosb -zdf imx28 -c $(TOPDIR)/board/$(BOARDDIR)/u-boot.bd 
                -o $(obj)u-boot.sb
    
    ifeq ($(CONFIG_SANDBOX),y)
    GEN_UBOOT = 
            cd $(LNDIR) && $(CC) $(SYMS) -T $(obj)u-boot.lds 
                -Wl,--start-group $(__LIBS) -Wl,--end-group 
                $(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map -o u-boot
    else
    GEN_UBOOT = 
            UNDEF_SYM=`$(OBJDUMP) -x $(LIBBOARD) $(LIBS) | 
            sed  -n -e 's/.*($(SYM_PREFIX)__u_boot_cmd_.*)/-u1/p'|sort|uniq`;
            cd $(LNDIR) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) $$UNDEF_SYM $(__OBJS) 
                --start-group $(__LIBS) --end-group $(PLATFORM_LIBS) 
                -Map u-boot.map -o u-boot
    endif
    
    $(obj)u-boot:    depend 
            $(SUBDIR_TOOLS) $(OBJS) $(LIBBOARD) $(LIBS) $(LDSCRIPT) $(obj)u-boot.lds
            $(GEN_UBOOT)
    ifeq ($(CONFIG_KALLSYMS),y)
            smap=`$(call SYSTEM_MAP,u-boot) | 
                awk '$$2 ~ /[tTwW]/ {printf $$1 $$3 "\\000"}'` ; 
            $(CC) $(CFLAGS) -DSYSTEM_MAP=""$${smap}"" 
                -c common/system_map.c -o $(obj)common/system_map.o
            $(GEN_UBOOT) $(obj)common/system_map.o
    endif
    
    $(OBJS):    depend
            $(MAKE) -C $(CPUDIR) $(if $(REMOTE_BUILD),$@,$(notdir $@))
    
    $(LIBS):    depend $(SUBDIR_TOOLS)
            $(MAKE) -C $(dir $(subst $(obj),,$@))
    
    $(LIBBOARD):    depend $(LIBS)
            $(MAKE) -C $(dir $(subst $(obj),,$@))
    
    $(SUBDIRS):    depend
            $(MAKE) -C $@ all
    
    $(SUBDIR_EXAMPLES): $(obj)u-boot
    
    $(LDSCRIPT):    depend
            $(MAKE) -C $(dir $@) $(notdir $@)
    
    $(obj)u-boot.lds: $(LDSCRIPT)
            $(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$^ >$@
    
    nand_spl:    $(TIMESTAMP_FILE) $(VERSION_FILE) depend
            $(MAKE) -C nand_spl/board/$(BOARDDIR) all
    
    $(obj)u-boot-nand.bin:    nand_spl $(obj)u-boot.bin
            cat $(obj)nand_spl/u-boot-spl-16k.bin $(obj)u-boot.bin > $(obj)u-boot-nand.bin
    
    onenand_ipl:    $(TIMESTAMP_FILE) $(VERSION_FILE) $(obj)include/autoconf.mk
            $(MAKE) -C onenand_ipl/board/$(BOARDDIR) all
    
    $(obj)u-boot-onenand.bin:    onenand_ipl $(obj)u-boot.bin
            cat $(ONENAND_BIN) $(obj)u-boot.bin > $(obj)u-boot-onenand.bin
    
    $(obj)spl/u-boot-spl.bin:    $(SUBDIR_TOOLS) depend
            $(MAKE) -C spl all
    
    updater:
            $(MAKE) -C tools/updater all
    
    # Explicitly make _depend in subdirs containing multiple targets to prevent
    # parallel sub-makes creating .depend files simultaneously.
    depend dep:    $(TIMESTAMP_FILE) $(VERSION_FILE) 
            $(obj)include/autoconf.mk 
            $(obj)include/generated/generic-asm-offsets.h 
            $(obj)include/generated/asm-offsets.h
            for dir in $(SUBDIRS) $(CPUDIR) $(LDSCRIPT_MAKEFILE_DIR) ; do 
                $(MAKE) -C $$dir _depend ; done
    
    TAG_SUBDIRS = $(SUBDIRS)
    TAG_SUBDIRS += $(dir $(__LIBS))
    TAG_SUBDIRS += include
    
    FIND := find
    FINDFLAGS := -L
    
    checkstack:
            $(CROSS_COMPILE)objdump -d $(obj)u-boot 
                `$(FIND) $(obj) -name u-boot-spl -print` | 
                perl $(src)tools/checkstack.pl $(ARCH)
    
    tags ctags:
            ctags -w -o $(obj)ctags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) 
                            -name '*.[chS]' -print`
    
    etags:
            etags -a -o $(obj)etags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) 
                            -name '*.[chS]' -print`
    cscope:
            $(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) -name '*.[chS]' -print > 
                            cscope.files
            cscope -b -q -k
    
    SYSTEM_MAP = 
            $(NM) $1 | 
            grep -v '(compiled)|(.o$$)|( [aUw] )|(..ng$$)|(LASH[RL]DI)' | 
            LC_ALL=C sort
    $(obj)System.map:    $(obj)u-boot
            @$(call SYSTEM_MAP,$<) > $(obj)System.map
    
    #
    # Auto-generate the autoconf.mk file (which is included by all makefiles)
    #
    # This target actually generates 2 files; autoconf.mk and autoconf.mk.dep.
    # the dep file is only include in this top level makefile to determine when
    # to regenerate the autoconf.mk file.
    $(obj)include/autoconf.mk.dep: $(obj)include/config.h include/common.h
        @$(XECHO) Generating $@ ; 
        set -e ; 
        : Generate the dependancies ; 
        $(CC) -x c -DDO_DEPS_ONLY -M $(CFLAGS) $(CPPFLAGS) 
            -MQ $(obj)include/autoconf.mk include/common.h > $@
    
    $(obj)include/autoconf.mk: $(obj)include/config.h
        @$(XECHO) Generating $@ ; 
        set -e ; 
        : Extract the config macros ; 
        $(CPP) $(CFLAGS) -DDO_DEPS_ONLY -dM include/common.h | 
            sed -n -f tools/scripts/define2mk.sed > $@.tmp && 
        mv $@.tmp $@
    
    $(obj)include/generated/generic-asm-offsets.h:    $(obj)include/autoconf.mk.dep 
        $(obj)lib/asm-offsets.s
        @$(XECHO) Generating $@
        tools/scripts/make-asm-offsets $(obj)lib/asm-offsets.s $@
    
    $(obj)lib/asm-offsets.s:    $(obj)include/autoconf.mk.dep 
        $(src)lib/asm-offsets.c
        @mkdir -p $(obj)lib
        $(CC) -DDO_DEPS_ONLY 
            $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) 
            -o $@ $(src)lib/asm-offsets.c -c -S
    
    $(obj)include/generated/asm-offsets.h:    $(obj)include/autoconf.mk.dep 
        $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s
        @echo Generating $@
        tools/scripts/make-asm-offsets $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s $@
    
    $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s:    $(obj)include/autoconf.mk.dep
        @mkdir -p $(obj)$(CPUDIR)/$(SOC)
        if [ -f $(src)$(CPUDIR)/$(SOC)/asm-offsets.c ];then 
            $(CC) -DDO_DEPS_ONLY 
            $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) 
                -o $@ $(src)$(CPUDIR)/$(SOC)/asm-offsets.c -c -S; 
        else 
            touch $@; 
        fi
    
    #########################################################################
    else    # !config.mk
    all $(obj)u-boot.hex $(obj)u-boot.srec $(obj)u-boot.bin 
    $(obj)u-boot.img $(obj)u-boot.dis $(obj)u-boot 
    $(filter-out tools,$(SUBDIRS)) 
    updater depend dep tags ctags etags cscope $(obj)System.map:
        @echo "System not configured - see README" >&2
        @ exit 1
    
    tools: $(VERSION_FILE) $(TIMESTAMP_FILE)
        $(MAKE) -C $@ all
    endif    # config.mk
    
    $(VERSION_FILE):
            @mkdir -p $(dir $(VERSION_FILE))
            @( localvers='$(shell $(TOPDIR)/tools/setlocalversion $(TOPDIR))' ; 
               printf '#define PLAIN_VERSION "%s%s"
    ' 
                "$(U_BOOT_VERSION)" "$${localvers}" ; 
               printf '#define U_BOOT_VERSION "U-Boot %s%s"
    ' 
                "$(U_BOOT_VERSION)" "$${localvers}" ; 
            ) > $@.tmp
            @( printf '#define CC_VERSION_STRING "%s"
    ' 
             '$(shell $(CC) --version | head -n 1)' )>>  $@.tmp
            @( printf '#define LD_VERSION_STRING "%s"
    ' 
             '$(shell $(LD) -v | head -n 1)' )>>  $@.tmp
            @cmp -s $@ $@.tmp && rm -f $@.tmp || mv -f $@.tmp $@
    
    $(TIMESTAMP_FILE):
            @mkdir -p $(dir $(TIMESTAMP_FILE))
            @LC_ALL=C date +'#define U_BOOT_DATE "%b %d %C%y"' > $@.tmp
            @LC_ALL=C date +'#define U_BOOT_TIME "%T"' >> $@.tmp
            @cmp -s $@ $@.tmp && rm -f $@.tmp || mv -f $@.tmp $@
    
    easylogo env gdb:
        $(MAKE) -C tools/$@ all MTD_VERSION=${MTD_VERSION}
    gdbtools: gdb
    
    tools-all: easylogo env gdb $(VERSION_FILE) $(TIMESTAMP_FILE)
        $(MAKE) -C tools HOST_TOOLS_ALL=y
    
    .PHONY : CHANGELOG
    CHANGELOG:
        git log --no-merges U-Boot-1_1_5.. | 
        unexpand -a | sed -e 's/ss*$$//' > $@
    
    include/license.h: tools/bin2header COPYING
        cat COPYING | gzip -9 -c | ./tools/bin2header license_gzip > include/license.h
    #########################################################################
    
    unconfig:
        @rm -f $(obj)include/config.h $(obj)include/config.mk 
            $(obj)board/*/config.tmp $(obj)board/*/*/config.tmp 
            $(obj)include/autoconf.mk $(obj)include/autoconf.mk.dep
    
    %_config::    unconfig
        @$(MKCONFIG) -A $(@:_config=)
    
    sinclude $(obj).boards.depend
    $(obj).boards.depend:    boards.cfg
        @awk '(NF && $$1 !~ /^#/) { print $$1 ": " $$1 "_config; $$(MAKE)" }' $< > $@
    
    #
    # Functions to generate common board directory names
    #
    lcname    = $(shell echo $(1) | sed -e 's/(.*)_config/L1/')
    ucname    = $(shell echo $(1) | sed -e 's/(.*)_config/U1/')
    
    #========================================================================
    # ARM
    #========================================================================
    
    SX1_stdout_serial_config 
    SX1_config:        unconfig
        @mkdir -p $(obj)include
        @if [ "$(findstring _stdout_serial_, $@)" ] ; then 
            echo "#undef CONFIG_STDOUT_USBTTY" >> $(obj)include/config.h ; 
        else 
            echo "#define CONFIG_STDOUT_USBTTY" >> $(obj)include/config.h ; 
        fi;
        @$(MKCONFIG) -n $@ SX1 arm arm925t sx1
    
    #########################################################################
    ## ARM1176 Systems
    #########################################################################
    smdk6400_noUSB_config    
    smdk6400_config    :    unconfig
        @mkdir -p $(obj)include $(obj)board/samsung/smdk6400
        @mkdir -p $(obj)nand_spl/board/samsung/smdk6400
        @echo "#define CONFIG_NAND_U_BOOT" > $(obj)include/config.h
        @echo "CONFIG_NAND_U_BOOT = y" >> $(obj)include/config.mk
        @if [ -z "$(findstring smdk6400_noUSB_config,$@)" ]; then            
            echo "RAM_TEXT = 0x57e00000" >> $(obj)board/samsung/smdk6400/config.tmp;
        else                                        
            echo "RAM_TEXT = 0xc7e00000" >> $(obj)board/samsung/smdk6400/config.tmp;
        fi
        @$(MKCONFIG) smdk6400 arm arm1176 smdk6400 samsung s3c64xx
        @echo "CONFIG_NAND_U_BOOT = y" >> $(obj)include/config.mk
    
    #########################################################################
    #########################################################################
    
    clean:
        @rm -f $(obj)examples/standalone/82559_eeprom              
               $(obj)examples/standalone/atmel_df_pow2              
               $(obj)examples/standalone/eepro100_eeprom          
               $(obj)examples/standalone/hello_world              
               $(obj)examples/standalone/interrupt              
               $(obj)examples/standalone/mem_to_mem_idma2intr          
               $(obj)examples/standalone/sched                  
               $(obj)examples/standalone/smc911{11,x}_eeprom          
               $(obj)examples/standalone/test_burst              
               $(obj)examples/standalone/timer
        @rm -f $(obj)examples/api/demo{,.bin}
        @rm -f $(obj)tools/bmp_logo       $(obj)tools/easylogo/easylogo  
               $(obj)tools/env/{fw_printenv,fw_setenv}              
               $(obj)tools/envcrc                      
               $(obj)tools/gdb/{astest,gdbcont,gdbsend}              
               $(obj)tools/gen_eth_addr    $(obj)tools/img2srec          
               $(obj)tools/mk{env,}image   $(obj)tools/mpc86x_clk      
               $(obj)tools/mk{smdk5250,}spl                  
               $(obj)tools/ncb           $(obj)tools/ubsha1
        @rm -f $(obj)board/cray/L1/{bootscript.c,bootscript.image}      
               $(obj)board/matrix_vision/*/bootscript.img          
               $(obj)board/voiceblue/eeprom                   
               $(obj)u-boot.lds                          
               $(obj)arch/blackfin/cpu/bootrom-asm-offsets.[chs]      
               $(obj)arch/blackfin/cpu/init.{lds,elf}
        @rm -f $(obj)include/bmp_logo.h
        @rm -f $(obj)include/bmp_logo_data.h
        @rm -f $(obj)lib/asm-offsets.s
        @rm -f $(obj)include/generated/asm-offsets.h
        @rm -f $(obj)$(CPUDIR)/$(SOC)/asm-offsets.s
        @rm -f $(obj)nand_spl/{u-boot.lds,u-boot-nand_spl.lds,u-boot-spl,u-boot-spl.map,System.map}
        @rm -f $(obj)onenand_ipl/onenand-{ipl,ipl.bin,ipl.map}
        @rm -f $(ONENAND_BIN)
        @rm -f $(obj)onenand_ipl/u-boot.lds
        @rm -f $(obj)spl/{u-boot-spl,u-boot-spl.bin,u-boot-spl.lds,u-boot-spl.map}
        @rm -f $(obj)MLO
        @rm -f $(TIMESTAMP_FILE) $(VERSION_FILE)
        @find $(OBJTREE) -type f 
            ( -name 'core' -o -name '*.bak' -o -name '*~' -o -name '*.su' 
            -o -name '*.o'    -o -name '*.a' -o -name '*.exe'    ) -print 
            | xargs rm -f
    
    # Removes everything not needed for testing u-boot
    tidy:    clean
        @find $(OBJTREE) -type f ( -name '*.depend*' ) -print | xargs rm -f
    
    clobber:    tidy
        @find $(OBJTREE) -type f ( -name '*.srec' 
            -o -name '*.bin' -o -name u-boot.img ) 
            -print0 | xargs -0 rm -f
        @rm -f $(OBJS) $(obj)*.bak $(obj)ctags $(obj)etags $(obj)TAGS 
            $(obj)cscope.* $(obj)*.*~
        @rm -f $(obj)u-boot $(obj)u-boot.map $(obj)u-boot.hex $(ALL-y)
        @rm -f $(obj)u-boot.kwb
        @rm -f $(obj)u-boot.imx
        @rm -f $(obj)u-boot.ubl
        @rm -f $(obj)u-boot.ais
        @rm -f $(obj)u-boot.dtb
        @rm -f $(obj)u-boot.sb
        @rm -f $(obj)tools/inca-swap-bytes
        @rm -f $(obj)arch/powerpc/cpu/mpc824x/bedbug_603e.c
        @rm -f $(obj)arch/powerpc/cpu/mpc83xx/ddr-gen?.c
        @rm -fr $(obj)include/asm/proc $(obj)include/asm/arch $(obj)include/asm
        @rm -fr $(obj)include/generated
        @[ ! -d $(obj)nand_spl ] || find $(obj)nand_spl -name "*" -type l -print | xargs rm -f
        @[ ! -d $(obj)onenand_ipl ] || find $(obj)onenand_ipl -name "*" -type l -print | xargs rm -f
        @rm -f $(obj)dts/*.tmp
    
    mrproper 
    distclean:    clobber unconfig
    ifneq ($(OBJTREE),$(SRCTREE))
        rm -rf $(obj)*
    endif
    
    backup:
        F=`basename $(TOPDIR)` ; cd .. ; 
        gtar --force-local -zcvf `LC_ALL=C date "+$$F-%Y-%m-%d-%T.tar.gz"` $$F
    
    #########################################################################

      

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  • 原文地址:https://www.cnblogs.com/Viewsky/p/4215173.html
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