make xxx_defconfig 的过程

make am64x_evm_r5_defconfig O=./testbuild V=1
make -C /home/wzx/ti-processor-sdk-linux-am64xx-evm-08.06.00.42/board-support/u-boot-2021.01/testbuild KBUILD_SRC=/home/wzx/ti-processor-sdk-linux-am64xx-evm-08.06.00.42/board-support/u-boot-2021.01 \
-f /home/wzx/ti-processor-sdk-linux-am64xx-evm-08.06.00.42/board-support/u-boot-2021.01/Makefile am64x_evm_r5_defconfig
make[1]: Entering directory '/home/wzx/ti-processor-sdk-linux-am64xx-evm-08.06.00.42/board-support/u-boot-2021.01/testbuild'
make -f ../scripts/Makefile.build obj=scripts/basic
rm -f .tmp_quiet_recordmcount
ln -fsn .. source
/bin/bash ../scripts/mkmakefile \.. . 2021 01GEN     ./Makefile
make -f ../scripts/Makefile.build obj=scripts/kconfig am64x_evm_r5_defconfig
scripts/kconfig/conf  --defconfig=arch/../configs/am64x_evm_r5_defconfig Kconfig
#
# configuration written to .config
#
make[1]: Leaving directory '/home/wzx/ti-processor-sdk-linux-am64xx-evm-08.06.00.42/board-support/u-boot-2021.01/testbuild'

顶层Makefile简单分析记录

# SPDX-License-Identifier: GPL-2.0+
#/*版本号*/
VERSION = 2021#主版本号
PATCHLEVEL = 01#补丁版本号
SUBLEVEL =
EXTRAVERSION =
NAME =# *DOCUMENTATION*
# To see a list of typical targets execute "make help"
# More info can be located in ./README
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.# o Do not use make's built-in rules and variables
#   (this increases performance and avoids hard-to-debug behaviour);
# o Look for make include files relative to root of kernel src#SHELL和MAKEFLAGS，除非使用unexport声明，否则他们的值自动传递给下级Makefile
#  = :最基本的赋值
# += :给变量追加值
# := :覆盖之前的值
# ?= :如果没有赋值过就赋予当前的值
MAKEFLAGS += -rR --include-dir=$(CURDIR)#-rR表示禁止使用内置的隐含规则和变量定义# Determine host architecture
include include/host_arch.h
MK_ARCH="${shell uname -m}"//MK_ARCH=x86_64
unexport HOST_ARCH
ifeq ("x86_64", $(MK_ARCH))export HOST_ARCH=$(HOST_ARCH_X86_64)#执行
else ifneq (,$(findstring $(MK_ARCH), "i386" "i486" "i586" "i686"))export HOST_ARCH=$(HOST_ARCH_X86)
else ifneq (,$(findstring $(MK_ARCH), "aarch64" "armv8l"))export HOST_ARCH=$(HOST_ARCH_AARCH64)
else ifeq ("armv7l", $(MK_ARCH))export HOST_ARCH=$(HOST_ARCH_ARM)
else ifeq ("riscv32", $(MK_ARCH))export HOST_ARCH=$(HOST_ARCH_RISCV32)
else ifeq ("riscv64", $(MK_ARCH))export HOST_ARCH=$(HOST_ARCH_RISCV64)
endif
undefine MK_ARCH# Avoid funny character set dependencies
unexport LC_ALL
LC_COLLATE=C
LC_NUMERIC=C
export LC_COLLATE LC_NUMERIC# Avoid interference with shell env settings
unexport GREP_OPTIONS# We are using a recursive build, so we need to do a little thinking
# to get the ordering right.
#
# Most importantly: sub-Makefiles should only ever modify files in
# their own directory. If in some directory we have a dependency on
# a file in another dir (which doesn't happen often, but it's often
# unavoidable when linking the built-in.o targets which finally
# turn into vmlinux), we will call a sub make in that other dir, and
# after that we are sure that everything which is in that other dir
# is now up to date.
#
# The only cases where we need to modify files which have global
# effects are thus separated out and done before the recursive
# descending is started. They are now explicitly listed as the
# prepare rule.# Beautify output
# ---------------------------------------------------------------------------
#
# Normally, we echo the whole command before executing it. By making
# that echo $($(quiet)$(cmd)), we now have the possibility to set
# $(quiet) to choose other forms of output instead, e.g.
#
#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
#
# If $(quiet) is empty, the whole command will be printed.
# If it is set to "quiet_", only the short version will be printed.
# If it is set to "silent_", nothing will be printed at all, since
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
# A simple variant is to prefix commands with $(Q) - that's useful
# for commands that shall be hidden in non-verbose mode.
#
#   $(Q)ln $@ :<
#
# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
# If KBUILD_VERBOSE equals 1 then the above command is displayed.
#
# To put more focus on warnings, be less verbose as default
# Use 'make V=1' to see the full commands#当使用V=1,KBUILD_VERBOSE=1,quiet=空，Q=空,使用变量quiet和Q来控制编译时是否完整输出命令
#在命令前加上@,就不会在终端输出命令
ifeq ("$(origin V)", "command line")KBUILD_VERBOSE = $(V)
endif
ifndef KBUILD_VERBOSEKBUILD_VERBOSE = 0
endififeq ($(KBUILD_VERBOSE),1)quiet =Q =
elsequiet=quiet_Q = @
endif# If the user is running make -s (silent mode), suppress echoing of
# commands#静默输出，不定义V,编译U-Boot时在终端中显示短命令，make -s即可实现静默输出
ifneq ($(filter 4.%,$(MAKE_VERSION)),)    # make-4
ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)quiet=silent_
endif
else                 # make-3.8x
ifneq ($(filter s% -s%,$(MAKEFLAGS)),)quiet=silent_
endif
endifexport quiet Q KBUILD_VERBOSE#设置编译输出目录
# kbuild supports saving output files in a separate directory.
# To locate output files in a separate directory two syntaxes are supported.
# In both cases the working directory must be the root of the kernel src.
# 1) O=
# Use "make O=dir/to/store/output/files/"
#
# 2) Set KBUILD_OUTPUT
# Set the environment variable KBUILD_OUTPUT to point to the directory
# where the output files shall be placed.
# export KBUILD_OUTPUT=dir/to/store/output/files/
# make
#
# The O= assignment takes precedence over the KBUILD_OUTPUT environment
# variable.# KBUILD_SRC is set on invocation of make in OBJ directory
# KBUILD_SRC is not intended to be used by the regular user (for now)
ifeq ($(KBUILD_SRC),)# OK, Make called in directory where kernel src resides
# Do we want to locate output files in a separate directory?
ifeq ("$(origin O)", "command line")KBUILD_OUTPUT := $(O)
endif# That's our default target when none is given on the command line
PHONY := _all
_all:# Cancel implicit rules on top Makefile
$(CURDIR)/Makefile Makefile: ;ifneq ($(KBUILD_OUTPUT),)
# Invoke a second make in the output directory, passing relevant variables
# check that the output directory actually exists
saved-output := $(KBUILD_OUTPUT)
KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \&& /bin/pwd)
$(if $(KBUILD_OUTPUT),, \$(error failed to create output directory "$(saved-output)"))PHONY += $(MAKECMDGOALS) sub-make$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make@:sub-make: FORCE$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))# Leave processing to above invocation of make
skip-makefile := 1
endif # ifneq ($(KBUILD_OUTPUT),)
endif # ifeq ($(KBUILD_SRC),)# We process the rest of the Makefile if this is the final invocation of make
ifeq ($(skip-makefile),)# Do not print "Entering directory ...",
# but we want to display it when entering to the output directory
# so that IDEs/editors are able to understand relative filenames.
MAKEFLAGS += --no-print-directory# Call a source code checker (by default, "sparse") as part of the
# C compilation.
#代码检查
# Use 'make C=1' to enable checking of only re-compiled files.
# Use 'make C=2' to enable checking of *all* source files, regardless
# of whether they are re-compiled or not.
#
# See the file "doc/sparse.txt" for more details, including
# where to get the "sparse" utility.ifeq ("$(origin C)", "command line")KBUILD_CHECKSRC = $(C)
endif
ifndef KBUILD_CHECKSRCKBUILD_CHECKSRC = 0
endif#模块编译，允许单独编译某个模块
# Use make M=dir to specify directory of external module to build
# Old syntax make ... SUBDIRS=$PWD is still supported
# Setting the environment variable KBUILD_EXTMOD take precedence
ifdef SUBDIRSKBUILD_EXTMOD ?= $(SUBDIRS)
endififeq ("$(origin M)", "command line")KBUILD_EXTMOD := $(M)
endif# If building an external module we do not care about the all: rule
# but instead _all depend on modules
PHONY += all
ifeq ($(KBUILD_EXTMOD),)
_all: all
else
_all: modules
endififeq ($(KBUILD_SRC),)# building in the source treesrctree := .
elseifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))# building in a subdirectory of the source treesrctree := ..elsesrctree := $(KBUILD_SRC)endif
endif
objtree     := .
src     := $(srctree)
obj     := $(objtree)VPATH      := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))export srctree objtree VPATH# Make sure CDPATH settings don't interfere
unexport CDPATH#########################################################################
#获取主机架构和系统
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/')export  HOSTARCH HOSTOS##########################################################################设置目标架构、交叉编译器和配置文件
# set default to nothing for native builds
ifeq ($(HOSTARCH),$(ARCH))
CROSS_COMPILE ?=
endif#配置文件.config默认是没有的，需要使用make xxx_defconfig对U-Boot进行配置
KCONFIG_CONFIG  ?= .config
export KCONFIG_CONFIG# SHELL used by kbuild
CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \else if [ -x /bin/bash ]; then echo /bin/bash; \else echo sh; fi ; fi)HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)HOSTCC       = cc
HOSTCXX      = c++
KBUILD_HOSTCFLAGS   := -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \$(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)# With the move to GCC 6, we have implicitly upgraded our language
# standard to GNU11 (see https://gcc.gnu.org/gcc-5/porting_to.html).
# Some Linux distributions (including RHEL7, SLES13, Debian 8) still
# have older compilers as their default, so we make it explicit for
# these that our host tools are GNU11 (i.e. C11 w/ GNU extensions).
CSTD_FLAG := -std=gnu11
ifeq ($(HOSTOS),linux)
KBUILD_HOSTCFLAGS += $(CSTD_FLAG)
endififeq ($(HOSTOS),cygwin)
KBUILD_HOSTCFLAGS   += -ansi
endif# Mac OS X / Darwin's C preprocessor is Apple specific.  It
# generates numerous errors and warnings.  We want to bypass it
# and use GNU C's cpp.  To do this we pass the -traditional-cpp
# option to the compiler.  Note that the -traditional-cpp flag
# DOES NOT have the same semantics as GNU C's flag, all it does
# is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
#
# Apple's linker is similar, thanks to the new 2 stage linking
# multiple symbol definitions are treated as errors, hence the
# -multiply_defined suppress option to turn off this error.
#
ifeq ($(HOSTOS),darwin)
# get major and minor product version (e.g. '10' and '6' for Snow Leopard)
DARWIN_MAJOR_VERSION    = $(shell sw_vers -productVersion | cut -f 1 -d '.')
DARWIN_MINOR_VERSION    = $(shell sw_vers -productVersion | cut -f 2 -d '.')os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \$(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)os_x_after = $(shell if [ $(DARWIN_MAJOR_VERSION) -ge $(1) -a \$(DARWIN_MINOR_VERSION) -ge $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)   # Snow Leopards build environment has no longer restrictions as described above
HOSTCC       = $(call os_x_before, 10, 5, "cc", "gcc")
KBUILD_HOSTCFLAGS  += $(call os_x_before, 10, 4, "-traditional-cpp")
KBUILD_HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")# since Lion (10.7) ASLR is on by default, but we use linker generated lists
# in some host tools which is a problem then ... so disable ASLR for these
# tools
KBUILD_HOSTLDFLAGS += $(call os_x_before, 10, 7, "", "-Xlinker -no_pie")# macOS Mojave (10.14.X)
# Undefined symbols for architecture x86_64: "_PyArg_ParseTuple"
KBUILD_HOSTLDFLAGS += $(call os_x_after, 10, 14, "-lpython -dynamclib", "")
endif# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.KBUILD_MODULES :=
KBUILD_BUILTIN := 1# If we have only "make modules", don't compile built-in objects.
# When we're building modules with modversions, we need to consider
# the built-in objects during the descend as well, in order to
# make sure the checksums are up to date before we record them.ifeq ($(MAKECMDGOALS),modules)KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
endif# If we have "make <whatever> modules", compile modules
# in addition to whatever we do anyway.
# Just "make" or "make all" shall build modules as well# U-Boot does not need modules
#ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
#  KBUILD_MODULES := 1
#endif#ifeq ($(MAKECMDGOALS),)
#  KBUILD_MODULES := 1
#endif# Check ths size of a binary:
# Args:
#   $1: File to check
#   #2: Size limit in bytes (decimal or 0xhex)
define size_checkactual=$$( wc -c $1 | awk '{print $$1}'); \limit=$$( printf "%d" $2 ); \if test $$actual -gt $$limit; then \echo "$1 exceeds file size limit:" >&2; \echo "  limit:  $$(printf %#x $$limit) bytes" >&2; \echo "  actual: $$(printf %#x $$actual) bytes" >&2; \echo "  excess: $$(printf %#x $$((actual - limit))) bytes" >&2;\exit 1; \fi
endef
export size_checkexport KBUILD_MODULES KBUILD_BUILTIN
export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD# We need some generic definitions (do not try to remake the file).
#里边定义了很多变量
scripts/Kbuild.include: ;
include scripts/Kbuild.include# Make variables (CC, etc...)
#交叉编译工具变量设置AS        = $(CROSS_COMPILE)as
# Always use GNU ld
ifneq ($(shell $(CROSS_COMPILE)ld.bfd -v 2> /dev/null),)
LD      = $(CROSS_COMPILE)ld.bfd
else
LD      = $(CROSS_COMPILE)ld
endif
CC      = $(CROSS_COMPILE)gcc
CPP     = $(CC) -E
AR      = $(CROSS_COMPILE)ar
NM      = $(CROSS_COMPILE)nm
LDR     = $(CROSS_COMPILE)ldr
STRIP       = $(CROSS_COMPILE)strip
OBJCOPY     = $(CROSS_COMPILE)objcopy
OBJDUMP     = $(CROSS_COMPILE)objdump
LEX     = flex
YACC        = bison
AWK     = awk
PERL        = perl
PYTHON      ?= python
PYTHON2     = python2
PYTHON3     = python3
DTC     ?= $(objtree)/scripts/dtc/dtc
CHECK       = sparseCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \-Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)KBUILD_CPPFLAGS := -D__KERNEL__ -D__UBOOT__KBUILD_CFLAGS   := -Wall -Wstrict-prototypes \-Wno-format-security \-fno-builtin -ffreestanding $(CSTD_FLAG)
KBUILD_CFLAGS   += -fshort-wchar -fno-strict-aliasing
KBUILD_AFLAGS   := -D__ASSEMBLY__
KBUILD_LDFLAGS  :=ifeq ($(cc-name),clang)
ifneq ($(CROSS_COMPILE),)
CLANG_TARGET    := --target=$(notdir $(CROSS_COMPILE:%-=%))
GCC_TOOLCHAIN_DIR := $(dir $(shell which $(LD)))
CLANG_PREFIX    := --prefix=$(GCC_TOOLCHAIN_DIR)
GCC_TOOLCHAIN   := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
endif
ifneq ($(GCC_TOOLCHAIN),)
CLANG_GCC_TC    := --gcc-toolchain=$(GCC_TOOLCHAIN)
endif
KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX)
KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX)
KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
endif# Don't generate position independent code
KBUILD_CFLAGS   += $(call cc-option,-fno-PIE)
KBUILD_AFLAGS   += $(call cc-option,-fno-PIE)# Read UBOOTRELEASE from include/config/uboot.release (if it exists)
UBOOTRELEASE = $(shell cat include/config/uboot.release 2> /dev/null)
UBOOTVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)export VERSION PATCHLEVEL SUBLEVEL UBOOTRELEASE UBOOTVERSION
export ARCH CPU BOARD VENDOR SOC CPUDIR BOARDDIR
export CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
export CPP AR NM LDR STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS
export MAKE LEX YACC AWK PERL PYTHON PYTHON2 PYTHON3
export HOSTCXX KBUILD_HOSTCXXFLAGS CHECK CHECKFLAGS DTC DTC_FLAGSexport KBUILD_CPPFLAGS NOSTDINC_FLAGS UBOOTINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
export KBUILD_CFLAGS KBUILD_AFLAGSexport CC_VERSION_TEXT := $(shell $(CC) --version | head -n 1)# When compiling out-of-tree modules, put MODVERDIR in the module
# tree rather than in the kernel tree. The kernel tree might
# even be read-only.
export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions# Files to ignore in find ... statementsexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \-name CVS -o -name .pc -o -name .hg -o -name .git \) \-prune -o
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \--exclude CVS --exclude .pc --exclude .hg --exclude .git# ===========================================================================
# Rules shared between *config targets and build targets# Basic helpers built in scripts/
PHONY += scripts_basic
scripts_basic:$(Q)$(MAKE) $(build)=scripts/basic$(Q)rm -f .tmp_quiet_recordmcount# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;PHONY += outputmakefile
# outputmakefile generates a Makefile in the output directory, if using a
# separate output directory. This allows convenient use of make in the
# output directory.
outputmakefile:
ifneq ($(KBUILD_SRC),)$(Q)ln -fsn $(srctree) source$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif# To make sure we do not include .config for any of the *config targets
# catch them early, and hand them over to scripts/kconfig/Makefile
# It is allowed to specify more targets when calling make, including
# mixing *config targets and build targets.
# For example 'make oldconfig all'.
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).version_h := include/generated/version_autogenerated.h
timestamp_h := include/generated/timestamp_autogenerated.h
defaultenv_h := include/generated/defaultenv_autogenerated.h
dt_h := include/generated/dt.hno-dot-config-targets := clean clobber mrproper distclean \help %docs check% coccicheck \ubootversion backup tests check qcheck tcheckconfig-targets := 0
mixed-targets  := 0
dot-config     := 1ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)dot-config := 0endif
endififeq ($(KBUILD_EXTMOD),)ifneq ($(filter config %config,$(MAKECMDGOALS)),)config-targets := 1ifneq ($(words $(MAKECMDGOALS)),1)mixed-targets := 1endifendif
endififeq ($(mixed-targets),1)
# ===========================================================================
# We're called with mixed targets (*config and build targets).
# Handle them one by one.PHONY += $(MAKECMDGOALS) __build_one_by_one$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one@:__build_one_by_one:$(Q)set -e; \for i in $(MAKECMDGOALS); do \$(MAKE) -f $(srctree)/Makefile $$i; \doneelse
ifeq ($(config-targets),1)
# ===========================================================================
# *config targets only - make sure prerequisites are updated, and descend
# in scripts/kconfig to make the *config targetKBUILD_DEFCONFIG := sandbox_defconfig
export KBUILD_DEFCONFIG KBUILD_KCONFIGconfig: scripts_basic outputmakefile FORCE$(Q)$(MAKE) $(build)=scripts/kconfig $@%config: scripts_basic outputmakefile FORCE$(Q)$(MAKE) $(build)=scripts/kconfig $@else
# ===========================================================================
# Build targets only - this includes vmlinux, arch specific targets, clean
# targets and others. In general all targets except *config targets.# Additional helpers built in scripts/
# Carefully list dependencies so we do not try to build scripts twice
# in parallel
PHONY += scripts
scripts: scripts_basic include/config/auto.conf$(Q)$(MAKE) $(build)=$(@)ifeq ($(dot-config),1)
# Read in config
-include include/config/auto.conf# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
-include include/config/auto.conf.cmd# To avoid any implicit rule to kick in, define an empty command
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;# If .config is newer than include/config/auto.conf, someone tinkered
# with it and forgot to run make oldconfig.
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
# we execute the config step to be sure to catch updated Kconfig files
include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig@# If the following part fails, include/config/auto.conf should be@# deleted so "make silentoldconfig" will be re-run on the next build.$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.autoconf || \{ rm -f include/config/auto.conf; false; }@# include/config.h has been updated after "make silentoldconfig".@# We need to touch include/config/auto.conf so it gets newer@# than include/config.h.@# Otherwise, 'make silentoldconfig' would be invoked twice.$(Q)touch include/config/auto.confu-boot.cfg spl/u-boot.cfg tpl/u-boot.cfg:$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.autoconf $(@)-include include/autoconf.mk
-include include/autoconf.mk.dep# We want to include arch/$(ARCH)/config.mk only when include/config/auto.conf
# is up-to-date. When we switch to a different board configuration, old CONFIG
# macros are still remaining in include/config/auto.conf. Without the following
# gimmick, wrong config.mk would be included leading nasty warnings/errors.
ifneq ($(wildcard $(KCONFIG_CONFIG)),)
ifneq ($(wildcard include/config/auto.conf),)
autoconf_is_old := $(shell find . -path ./$(KCONFIG_CONFIG) -newer \include/config/auto.conf)
ifeq ($(autoconf_is_old),)
include config.mk
include arch/$(ARCH)/Makefile
endif
endif
endif# These are set by the arch-specific config.mk. Make sure they are exported
# so they can be used when building an EFI application.
export EFI_LDS        # Filename of EFI link script in arch/$(ARCH)/lib
export EFI_CRT0       # Filename of EFI CRT0 in arch/$(ARCH)/lib
export EFI_RELOC  # Filename of EFU relocation code in arch/$(ARCH)/lib
export CFLAGS_EFI # Compiler flags to add when building EFI app
export CFLAGS_NON_EFI # Compiler flags to remove when building EFI app
export EFI_TARGET # binutils target if EFI is natively supported# 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.ifndef LDSCRIPT#LDSCRIPT := $(srctree)/board/$(BOARDDIR)/u-boot.lds.debugifdef CONFIG_SYS_LDSCRIPT# need to strip off double quotesLDSCRIPT := $(srctree)/$(CONFIG_SYS_LDSCRIPT:"%"=%)endif
endif# If there is no specified link script, we look in a number of places for it
ifndef LDSCRIPTifeq ($(wildcard $(LDSCRIPT)),)LDSCRIPT := $(srctree)/board/$(BOARDDIR)/u-boot.ldsendififeq ($(wildcard $(LDSCRIPT)),)LDSCRIPT := $(srctree)/$(CPUDIR)/u-boot.ldsendififeq ($(wildcard $(LDSCRIPT)),)LDSCRIPT := $(srctree)/arch/$(ARCH)/cpu/u-boot.ldsendif
endifelse
# Dummy target needed, because used as prerequisite
include/config/auto.conf: ;
endif # $(dot-config)#
# Xtensa linker script cannot be preprocessed with -ansi because of
# preprocessor operations on strings that don't make C identifiers.
#
ifeq ($(CONFIG_XTENSA),)
LDPPFLAGS   += -ansi
endififdef CONFIG_CC_OPTIMIZE_FOR_SIZE
KBUILD_CFLAGS   += -Os
else
KBUILD_CFLAGS   += -O2
endifKBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks)# disable stringop warnings in gcc 8+
KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)# Enabled with W=2, disabled by default as noisy
KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)# change __FILE__ to the relative path from the srctree
KBUILD_CFLAGS   += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)KBUILD_CFLAGS += -g
# $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
# option to the assembler.
KBUILD_AFLAGS   += -g# Report stack usage if supported
# ARC tools based on GCC 7.1 has an issue with stack usage
# with naked functions, see commit message for more details
ifndef CONFIG_ARC
ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-stack-usage.sh $(CC)),y)KBUILD_CFLAGS += -fstack-usage
endif
endifKBUILD_CFLAGS += $(call cc-option,-Wno-format-nonliteral)
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)ifeq ($(cc-name),clang)
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
# Quiet clang warning: comparison of unsigned expression < 0 is always false
KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
# source of a reference will be _MergedGlobals and not on of the whitelisted names.
# See modpost pattern 2
KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
else# These warnings generated too much noise in a regular build.
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
endif# Prohibit date/time macros, which would make the build non-deterministic
KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)include scripts/Makefile.extrawarn# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
KBUILD_CPPFLAGS += $(KCPPFLAGS)
KBUILD_AFLAGS += $(KAFLAGS)
KBUILD_CFLAGS += $(KCFLAGS)KBUILD_HOSTCFLAGS += $(if $(CONFIG_TOOLS_DEBUG),-g)# Use UBOOTINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
UBOOTINCLUDE    := \-Iinclude \$(if $(KBUILD_SRC), -I$(srctree)/include) \$(if $(CONFIG_$(SPL_)SYS_THUMB_BUILD), \$(if $(CONFIG_HAS_THUMB2), \$(if $(CONFIG_CPU_V7M), \-I$(srctree)/arch/arm/thumb1/include), \-I$(srctree)/arch/arm/thumb1/include)) \-I$(srctree)/arch/$(ARCH)/include \-include $(srctree)/include/linux/kconfig.hNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)# FIX ME
cpp_flags := $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) $(UBOOTINCLUDE) \$(NOSTDINC_FLAGS)
c_flags := $(KBUILD_CFLAGS) $(cpp_flags)#########################################################################
# U-Boot objects....order is important (i.e. start must be first)HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(srctree)/board/$(VENDOR)/common/Makefile),y,n)libs-y += lib/
libs-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/
libs-$(CONFIG_OF_EMBED) += dts/
libs-y += fs/
libs-y += net/
libs-y += disk/
libs-y += drivers/
libs-y += drivers/dma/
libs-y += drivers/gpio/
libs-y += drivers/i2c/
libs-y += drivers/net/
libs-y += drivers/net/phy/
libs-y += drivers/power/ \drivers/power/domain/ \drivers/power/fuel_gauge/ \drivers/power/mfd/ \drivers/power/pmic/ \drivers/power/battery/ \drivers/power/regulator/
libs-y += drivers/spi/
libs-$(CONFIG_FMAN_ENET) += drivers/net/fm/
libs-$(CONFIG_SYS_FSL_DDR) += drivers/ddr/fsl/
libs-$(CONFIG_SYS_FSL_MMDC) += drivers/ddr/fsl/
libs-$(CONFIG_$(SPL_)ALTERA_SDRAM) += drivers/ddr/altera/
libs-y += drivers/serial/
libs-y += drivers/usb/cdns3/
libs-y += drivers/usb/dwc3/
libs-y += drivers/usb/common/
libs-y += drivers/usb/emul/
libs-y += drivers/usb/eth/
libs-$(CONFIG_USB_GADGET) += drivers/usb/gadget/
libs-$(CONFIG_USB_GADGET) += drivers/usb/gadget/udc/
libs-y += drivers/usb/host/
libs-y += drivers/usb/mtu3/
libs-y += drivers/usb/musb/
libs-y += drivers/usb/musb-new/
libs-y += drivers/usb/phy/
libs-y += drivers/usb/ulpi/
libs-y += cmd/
libs-y += common/
libs-y += env/
libs-$(CONFIG_API) += api/
ifdef CONFIG_POST
libs-y += post/
endif
libs-$(CONFIG_UNIT_TEST) += test/
libs-$(CONFIG_UT_ENV) += test/env/
libs-$(CONFIG_UT_OPTEE) += test/optee/
libs-$(CONFIG_UT_OVERLAY) += test/overlay/libs-y += $(if $(BOARDDIR),board/$(BOARDDIR)/)libs-y := $(sort $(libs-y))u-boot-dirs := $(patsubst %/,%,$(filter %/, $(libs-y))) tools examplesu-boot-alldirs    := $(sort $(u-boot-dirs) $(patsubst %/,%,$(filter %/, $(libs-))))libs-y        := $(patsubst %/, %/built-in.o, $(libs-y))u-boot-init := $(head-y)
u-boot-main := $(libs-y)# Add GCC lib
ifeq ($(CONFIG_USE_PRIVATE_LIBGCC),y)
PLATFORM_LIBGCC = arch/$(ARCH)/lib/lib.a
else
PLATFORM_LIBGCC := -L $(shell dirname `$(CC) $(c_flags) -print-libgcc-file-name`) -lgcc
endif
PLATFORM_LIBS += $(PLATFORM_LIBGCC)ifdef CONFIG_CC_COVERAGE
KBUILD_CFLAGS += --coverage
PLATFORM_LIBGCC += -lgcov
endifexport PLATFORM_LIBS
export PLATFORM_LIBGCC# Special flags for CPP when processing the linker script.
# Pass the version down so we can handle backwards compatibility
# on the fly.
LDPPFLAGS += \-include $(srctree)/include/u-boot/u-boot.lds.h \-DCPUDIR=$(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')#########################################################################
#########################################################################ifneq ($(CONFIG_BOARD_SIZE_LIMIT),)
BOARD_SIZE_CHECK= @ $(call size_check,$@,$(CONFIG_BOARD_SIZE_LIMIT))
else
BOARD_SIZE_CHECK =
endififneq ($(CONFIG_SPL_SIZE_LIMIT),0x0)
SPL_SIZE_CHECK = @$(call size_check,$@,$$(tools/spl_size_limit))
else
SPL_SIZE_CHECK =
endififneq ($(CONFIG_TPL_SIZE_LIMIT),0x0)
TPL_SIZE_CHECK = @$(call size_check,$@,$(CONFIG_TPL_SIZE_LIMIT))
else
TPL_SIZE_CHECK =
endif# Statically apply RELA-style relocations (currently arm64 only)
# This is useful for arm64 where static relocation needs to be performed on
# the raw binary, but certain simulators only accept an ELF file (but don't
# do the relocation).
ifneq ($(CONFIG_STATIC_RELA),)
# $(1) is u-boot ELF, $(2) is u-boot bin, $(3) is text base
quiet_cmd_static_rela = RELOC   $@
cmd_static_rela = \start=$$($(NM) $(2) | grep __rel_dyn_start | cut -f 1 -d ' '); \end=$$($(NM) $(2) | grep __rel_dyn_end | cut -f 1 -d ' '); \tools/relocate-rela $(3) $(4) $$start $$end
else
quiet_cmd_static_rela =
cmd_static_rela = true
endif# Always append INPUTS so that arch config.mk's can add custom ones
INPUTS-y += u-boot.srec u-boot.bin u-boot.sym System.map binary_size_checkINPUTS-$(CONFIG_ONENAND_U_BOOT) += u-boot-onenand.bin
ifeq ($(CONFIG_SPL_FSL_PBL),y)
INPUTS-$(CONFIG_RAMBOOT_PBL) += u-boot-with-spl-pbl.bin
else
ifneq ($(CONFIG_NXP_ESBC), y)
# For Secure Boot The Image needs to be signed and Header must also
# be included. So The image has to be built explicitly
INPUTS-$(CONFIG_RAMBOOT_PBL) += u-boot.pbl
endif
endif
INPUTS-$(CONFIG_SPL) += spl/u-boot-spl.bin
ifeq ($(CONFIG_MX6)$(CONFIG_IMX_HAB), yy)
INPUTS-$(CONFIG_SPL_FRAMEWORK) += u-boot-ivt.img
else
ifeq ($(CONFIG_MX7)$(CONFIG_IMX_HAB), yy)
INPUTS-$(CONFIG_SPL_FRAMEWORK) += u-boot-ivt.img
else
INPUTS-$(CONFIG_SPL_FRAMEWORK) += u-boot.img
endif
endif
INPUTS-$(CONFIG_TPL) += tpl/u-boot-tpl.bin
INPUTS-$(CONFIG_OF_SEPARATE) += u-boot.dtb
ifeq ($(CONFIG_SPL_FRAMEWORK),y)
INPUTS-$(CONFIG_OF_SEPARATE) += u-boot-dtb.img
endif
INPUTS-$(CONFIG_OF_HOSTFILE) += u-boot.dtb
ifneq ($(CONFIG_SPL_TARGET),)
INPUTS-$(CONFIG_SPL) += $(CONFIG_SPL_TARGET:"%"=%)
endif
INPUTS-$(CONFIG_REMAKE_ELF) += u-boot.elf
INPUTS-$(CONFIG_EFI_APP) += u-boot-app.efi
INPUTS-$(CONFIG_EFI_STUB) += u-boot-payload.efi# Generate this input file for binman
ifeq ($(CONFIG_SPL),)
INPUTS-$(CONFIG_ARCH_MEDIATEK) += u-boot-mtk.bin
endif# Add optional build target if defined in board/cpu/soc headers
ifneq ($(CONFIG_BUILD_TARGET),)
INPUTS-y += $(CONFIG_BUILD_TARGET:"%"=%)
endififeq ($(CONFIG_INIT_SP_RELATIVE)$(CONFIG_OF_SEPARATE),yy)
INPUTS-y += init_sp_bss_offset_check
endififeq ($(CONFIG_MPC85xx)$(CONFIG_OF_SEPARATE),yy)
INPUTS-y += u-boot-with-dtb.bin
endififeq ($(CONFIG_ARCH_ROCKCHIP),y)
# On ARM64 this target is produced by binman so we don't need this dep
ifeq ($(CONFIG_ARM64),y)
ifeq ($(CONFIG_SPL),y)
# TODO: Get binman to generate this too
INPUTS-y += u-boot-rockchip.bin
endif
else
ifeq ($(CONFIG_SPL),y)
# Generate these inputs for binman which will create the output files
INPUTS-y += idbloader.img u-boot.img
endif
endif
endifINPUTS-$(CONFIG_X86) += u-boot-x86-start16.bin u-boot-x86-reset16.bin \$(if $(CONFIG_SPL_X86_16BIT_INIT),spl/u-boot-spl.bin) \$(if $(CONFIG_TPL_X86_16BIT_INIT),tpl/u-boot-tpl.bin)LDFLAGS_u-boot += $(LDFLAGS_FINAL)# Avoid 'Not enough room for program headers' error on binutils 2.28 onwards.
LDFLAGS_u-boot += $(call ld-option, --no-dynamic-linker)ifeq ($(CONFIG_ARC)$(CONFIG_NIOS2)$(CONFIG_X86)$(CONFIG_XTENSA),)
LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
endif# insure the checker run with the right endianness
CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)# the checker needs the correct machine size
CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)# Normally we fill empty space with 0xff
quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) --gap-fill=0xff $(OBJCOPYFLAGS) \$(OBJCOPYFLAGS_$(@F)) $< $@# Provide a version which does not do this, for use by EFI
quiet_cmd_zobjcopy = OBJCOPY $@
cmd_zobjcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@quiet_cmd_efipayload = OBJCOPY $@
cmd_efipayload = $(OBJCOPY) -I binary -O $(EFIPAYLOAD_BFDTARGET) -B $(EFIPAYLOAD_BFDARCH) $< $@MKIMAGEOUTPUT ?= /dev/nullquiet_cmd_mkimage = MKIMAGE $@
cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \>$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))quiet_cmd_mkfitimage = MKIMAGE $@
cmd_mkfitimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) \-f $(U_BOOT_ITS) -p $(CONFIG_FIT_EXTERNAL_OFFSET) $@ \>$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))quiet_cmd_cat = CAT     $@
cmd_cat = cat $(filter-out $(PHONY), $^) > $@append = cat $(filter-out $< $(PHONY), $^) >> $@quiet_cmd_pad_cat = CAT     $@
cmd_pad_cat = $(cmd_objcopy) && $(append) || rm -f $@quiet_cmd_lzma = LZMA    $@
cmd_lzma = lzma -c -z -k -9 $< > $@cfg: u-boot.cfgquiet_cmd_cfgcheck = CFGCHK  $2
cmd_cfgcheck = $(srctree)/scripts/check-config.sh $2 \$(srctree)/scripts/config_whitelist.txt $(srctree)PHONY += inputs
inputs: $(INPUTS-y)all: .binman_stamp inputs
ifeq ($(CONFIG_BINMAN),y)$(call if_changed,binman)
endif# Timestamp file to make sure that binman always runs
.binman_stamp: FORCE@touch $@ifeq ($(CONFIG_DEPRECATED),y)$(warning "You have deprecated configuration options enabled in your .config! Please check your configuration.")
ifeq ($(CONFIG_SPI),y)
ifneq ($(CONFIG_DM_SPI)$(CONFIG_OF_CONTROL),yy)$(warning "The relevant config item with associated code will remove in v2019.07 release.")
endif
endif
endif
ifneq ($(CONFIG_DM),y)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board does not use CONFIG_DM. CONFIG_DM will be"@echo >&2 "compulsory starting with the v2020.01 release."@echo >&2 "Failure to update may result in board removal."@echo >&2 "See doc/driver-model/migration.rst for more info."@echo >&2 "===================================================="
endif
ifeq ($(CONFIG_MMC),y)
ifneq ($(CONFIG_DM_MMC)$(CONFIG_BLK),yy)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board does not use CONFIG_DM_MMC. Please update"@echo >&2 "the board to use CONFIG_DM_MMC before the v2019.04 release."@echo >&2 "Failure to update by the deadline may result in board removal."@echo >&2 "See doc/driver-model/migration.rst for more info."@echo >&2 "===================================================="
endif
endif
ifeq ($(CONFIG_USB),y)
ifneq ($(CONFIG_DM_USB)$(CONFIG_OF_CONTROL)$(CONFIG_BLK),yyy)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board does not use CONFIG_DM_USB. Please update"@echo >&2 "the board to use CONFIG_DM_USB before the v2019.07 release."@echo >&2 "Failure to update by the deadline may result in board removal."@echo >&2 "See doc/driver-model/migration.rst for more info."@echo >&2 "===================================================="
endif
endif
ifeq ($(CONFIG_MVSATA_IDE),y)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board does use CONFIG_MVSATA_IDE which is not"@echo >&2 "ported to driver-model (DM) yet. Please update the storage"@echo >&2 "controller driver to use CONFIG_AHCI before the v2019.07"@echo >&2 "release."@echo >&2 "Failure to update by the deadline may result in board removal."@echo >&2 "See doc/driver-model/migration.rst for more info."@echo >&2 "===================================================="
endif
ifeq ($(CONFIG_LIBATA),y)
ifneq ($(CONFIG_AHCI),y)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board does use CONFIG_LIBATA but has CONFIG_AHCI not"@echo >&2 "enabled. Please update the storage controller driver to use"@echo >&2 "CONFIG_AHCI before the v2019.07 release."@echo >&2 "Failure to update by the deadline may result in board removal."@echo >&2 "See doc/driver-model/migration.rst for more info."@echo >&2 "===================================================="
endif
endif
ifeq ($(CONFIG_PCI),y)
ifneq ($(CONFIG_DM_PCI),y)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board does not use CONFIG_DM_PCI Please update"@echo >&2 "the board to use CONFIG_DM_PCI before the v2019.07 release."@echo >&2 "Failure to update by the deadline may result in board removal."@echo >&2 "See doc/driver-model/migration.rst for more info."@echo >&2 "===================================================="
endif
endif
ifneq ($(CONFIG_LCD)$(CONFIG_VIDEO),)
ifneq ($(CONFIG_DM_VIDEO),y)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board does not use CONFIG_DM_VIDEO Please update"@echo >&2 "the board to use CONFIG_DM_VIDEO before the v2019.07 release."@echo >&2 "Failure to update by the deadline may result in board removal."@echo >&2 "See doc/driver-model/migration.rst for more info."@echo >&2 "===================================================="
endif
endif
ifeq ($(CONFIG_OF_EMBED),y)@echo >&2 "===================== WARNING ======================"@echo >&2 "CONFIG_OF_EMBED is enabled. This option should only"@echo >&2 "be used for debugging purposes. Please use"@echo >&2 "CONFIG_OF_SEPARATE for boards in mainline."@echo >&2 "See doc/README.fdt-control for more info."@echo >&2 "===================================================="
endif
ifeq ($(CONFIG_SPI_FLASH),y)
ifneq ($(CONFIG_DM_SPI_FLASH)$(CONFIG_OF_CONTROL),yy)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board does not use CONFIG_DM_SPI_FLASH. Please update"@echo >&2 "the board to use CONFIG_SPI_FLASH before the v2019.07 release."@echo >&2 "Failure to update by the deadline may result in board removal."@echo >&2 "See doc/driver-model/migration.rst for more info."@echo >&2 "===================================================="
endif
endif
ifneq ($(CONFIG_WATCHDOG)$(CONFIG_HW_WATCHDOG),)
ifneq ($(CONFIG_WDT),y)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board does not use CONFIG_WDT (DM watchdog support)."@echo >&2 "Please update the board to use CONFIG_WDT before the"@echo >&2 "v2019.10 release."@echo >&2 "Failure to update by the deadline may result in board removal."@echo >&2 "See doc/driver-model/migration.rst for more info."@echo >&2 "===================================================="
endif
endif
ifneq ($(CONFIG_NET),)
ifneq ($(CONFIG_DM_ETH),y)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board does not use CONFIG_DM_ETH (Driver Model"@echo >&2 "for Ethernet drivers). Please update the board to use"@echo >&2 "CONFIG_DM_ETH before the v2020.07 release. Failure to"@echo >&2 "update by the deadline may result in board removal."@echo >&2 "See doc/driver-model/migration.rst for more info."@echo >&2 "===================================================="
endif
endif
ifneq ($(CONFIG_SPL_FIT_GENERATOR),)@echo >&2 "===================== WARNING ======================"@echo >&2 "This board uses CONFIG_SPL_FIT_GENERATOR. Please migrate"@echo >&2 "to binman instead, to avoid the proliferation of"@echo >&2 "arch-specific scripts with no tests."@echo >&2 "===================================================="
endif@# Check that this build does not use CONFIG options that we do not@# know about unless they are in Kconfig. All the existing CONFIG@# options are whitelisted, so new ones should not be added.$(call cmd,cfgcheck,u-boot.cfg)PHONY += dtbs
dtbs: dts/dt.dtb@:
dts/dt.dtb: u-boot$(Q)$(MAKE) $(build)=dts dtbsquiet_cmd_copy = COPY    $@cmd_copy = cp $< $@ifeq ($(CONFIG_MULTI_DTB_FIT),y)ifeq ($(CONFIG_MULTI_DTB_FIT_LZO),y)
FINAL_DTB_CONTAINER = fit-dtb.blob.lzo
else ifeq ($(CONFIG_MULTI_DTB_FIT_GZIP),y)
FINAL_DTB_CONTAINER = fit-dtb.blob.gz
else
FINAL_DTB_CONTAINER = fit-dtb.blob
endiffit-dtb.blob.gz: fit-dtb.blob@gzip -kf9 $< > $@fit-dtb.blob.lzo: fit-dtb.blob@lzop -f9 $< > $@fit-dtb.blob: dts/dt.dtb FORCE$(call if_changed,mkimage)
ifneq ($(SOURCE_DATE_EPOCH),)touch -d @$(SOURCE_DATE_EPOCH) fit-dtb.blobchmod 0600 fit-dtb.blob
endifMKIMAGEFLAGS_fit-dtb.blob = -f auto -A $(ARCH) -T firmware -C none -O u-boot \-a 0 -e 0 -E \$(patsubst %,-b arch/$(ARCH)/dts/%.dtb,$(subst ",,$(CONFIG_OF_LIST))) -d /dev/nullifneq ($(EXT_DTB),)
u-boot-fit-dtb.bin: u-boot-nodtb.bin $(EXT_DTB)$(call if_changed,cat)
else
u-boot-fit-dtb.bin: u-boot-nodtb.bin $(FINAL_DTB_CONTAINER)$(call if_changed,cat)
endifu-boot.bin: u-boot-fit-dtb.bin FORCE$(call if_changed,copy)u-boot-dtb.bin: u-boot-nodtb.bin dts/dt.dtb FORCE$(call if_changed,cat)else ifeq ($(CONFIG_OF_SEPARATE),y)
u-boot-dtb.bin: u-boot-nodtb.bin dts/dt.dtb FORCE$(call if_changed,cat)u-boot.bin: u-boot-dtb.bin FORCE$(call if_changed,copy)
else
u-boot.bin: u-boot-nodtb.bin FORCE$(call if_changed,copy)
endif# we call Makefile in arch/arm/mach-imx which
# has targets which are dependent on targets defined
# here. make could not resolve them and we must ensure
# that they are finished before calling imx targets
ifeq ($(CONFIG_MULTI_DTB_FIT),y)
IMX_DEPS = u-boot-fit-dtb.bin
endif%.imx: $(IMX_DEPS) %.bin$(Q)$(MAKE) $(build)=arch/arm/mach-imx $@$(BOARD_SIZE_CHECK)%.vyb: %.imx$(Q)$(MAKE) $(build)=arch/arm/cpu/armv7/vf610 $@quiet_cmd_copy = COPY    $@cmd_copy = cp $< $@u-boot.dtb: dts/dt.dtb$(call cmd,copy)OBJCOPYFLAGS_u-boot.hex := -O ihexOBJCOPYFLAGS_u-boot.srec := -O srecu-boot.hex u-boot.srec: u-boot FORCE$(call if_changed,objcopy)OBJCOPYFLAGS_u-boot-elf.srec := $(OBJCOPYFLAGS_u-boot.srec)u-boot-elf.srec: u-boot.elf FORCE$(call if_changed,objcopy)OBJCOPYFLAGS_u-boot-spl.srec = $(OBJCOPYFLAGS_u-boot.srec)spl/u-boot-spl.srec: spl/u-boot-spl FORCE$(call if_changed,objcopy)%.scif: %.srec$(Q)$(MAKE) $(build)=arch/arm/mach-rmobile $@OBJCOPYFLAGS_u-boot-nodtb.bin := -O binary \$(if $(CONFIG_X86_16BIT_INIT),-R .start16 -R .resetvec) \$(if $(CONFIG_MPC85XX_HAVE_RESET_VECTOR),-R .bootpg -R .resetvec)OBJCOPYFLAGS_u-boot-spl.hex = $(OBJCOPYFLAGS_u-boot.hex)spl/u-boot-spl.hex: spl/u-boot-spl FORCE$(call if_changed,objcopy)binary_size_check: u-boot-nodtb.bin FORCE@file_size=$(shell wc -c u-boot-nodtb.bin | awk '{print $$1}') ; \map_size=$(shell cat u-boot.map | \awk '/_image_copy_start/ {start = $$1} /_image_binary_end/ {end = $$1} END {if (start != "" && end != "") print "ibase=16; " toupper(end) " - " toupper(start)}' \| sed 's/0X//g' \| bc); \if [ "" != "$$map_size" ]; then \if test $$map_size -ne $$file_size; then \echo "u-boot.map shows a binary size of $$map_size" >&2 ; \echo "  but u-boot-nodtb.bin shows $$file_size" >&2 ; \exit 1; \fi \fiifeq ($(CONFIG_INIT_SP_RELATIVE)$(CONFIG_OF_SEPARATE),yy)
ifneq ($(CONFIG_SYS_MALLOC_F_LEN),)
subtract_sys_malloc_f_len = space=$$(($${space} - $(CONFIG_SYS_MALLOC_F_LEN)))
else
subtract_sys_malloc_f_len = true
endif
# The 1/4 margin below is somewhat arbitrary. The likely initial SP usage is
# so low that the DTB could probably use 90%+ of the available space, for
# current values of CONFIG_SYS_INIT_SP_BSS_OFFSET at least. However, let's be
# safe for now and tweak this later if space becomes tight.
# A rejected alternative would be to check that some absolute minimum stack
# space was available. However, since CONFIG_SYS_INIT_SP_BSS_OFFSET is
# deliberately build-specific, to take account of build-to-build stack usage
# differences due to different feature sets, there is no common absolute value
# to check against.
init_sp_bss_offset_check: u-boot.dtb FORCE@dtb_size=$(shell wc -c u-boot.dtb | awk '{print $$1}') ; \space=$(CONFIG_SYS_INIT_SP_BSS_OFFSET) ; \$(subtract_sys_malloc_f_len) ; \quarter_space=$$(($${space} / 4)) ; \if [ $${dtb_size} -gt $${quarter_space} ]; then \echo "u-boot.dtb is larger than 1 quarter of " >&2 ; \echo "(CONFIG_SYS_INIT_SP_BSS_OFFSET - CONFIG_SYS_MALLOC_F_LEN)" >&2 ; \exit 1 ; \fi
endifshell_cmd = { $(call echo-cmd,$(1)) $(cmd_$(1)); }quiet_cmd_objcopy_uboot = OBJCOPY $@
cmd_objcopy_uboot = $(cmd_objcopy) && $(call shell_cmd,static_rela,$<,$@,$(CONFIG_SYS_TEXT_BASE)) || rm -f $@u-boot-nodtb.bin: u-boot FORCE$(call if_changed,objcopy_uboot)$(BOARD_SIZE_CHECK)u-boot.ldr:  u-boot$(CREATE_LDR_ENV)$(LDR) -T $(CONFIG_CPU) -c $@ $< $(LDR_FLAGS)$(BOARD_SIZE_CHECK)# binman
# ---------------------------------------------------------------------------
# Use 'make BINMAN_DEBUG=1' to enable debugging
ifneq ($(ATF),)
BL31 = $(ATF)
endif
default_dt := $(if $(DEVICE_TREE),$(DEVICE_TREE),$(CONFIG_DEFAULT_DEVICE_TREE))
quiet_cmd_binman = BINMAN  $@
cmd_binman = $(srctree)/tools/binman/binman $(if $(BINMAN_DEBUG),-D) \--toolpath $(objtree)/tools \$(if $(BINMAN_VERBOSE),-v$(BINMAN_VERBOSE)) \build -u -d u-boot.dtb -O . -m --allow-missing \-I . -I $(srctree) -I $(srctree)/board/$(BOARDDIR) \-I arch/$(ARCH)/dts -a of-list=$(CONFIG_OF_LIST) \-a atf-bl31-path=${BL31} \-a tee-os-path=${TEE} \-a ti-secure-dev-pkg-path=${TI_SECURE_DEV_PKG} \-a default-dt=$(default_dt) \-a scp-path=$(SCP) \$(BINMAN_$(@F))OBJCOPYFLAGS_u-boot.ldr.hex := -I binary -O ihexOBJCOPYFLAGS_u-boot.ldr.srec := -I binary -O srecu-boot.ldr.hex u-boot.ldr.srec: u-boot.ldr FORCE$(call if_changed,objcopy)#
# U-Boot entry point, needed for booting of full-blown U-Boot
# from the SPL U-Boot version.
#
ifndef CONFIG_SYS_UBOOT_START
CONFIG_SYS_UBOOT_START := $(CONFIG_SYS_TEXT_BASE)
endif# Boards with more complex image requirements can provide an .its source file
# or a generator script
# NOTE: Please do not use this. We are migrating away from Makefile rules to use
# binman instead.
ifneq ($(CONFIG_SPL_FIT_SOURCE),"")
U_BOOT_ITS := u-boot.its
$(U_BOOT_ITS): $(subst ",,$(CONFIG_SPL_FIT_SOURCE))$(call if_changed,copy)
else
ifneq ($(CONFIG_USE_SPL_FIT_GENERATOR),)
U_BOOT_ITS := u-boot.its
ifeq ($(CONFIG_SPL_FIT_GENERATOR),"arch/arm/mach-imx/mkimage_fit_atf.sh")
U_BOOT_ITS_DEPS += u-boot-nodtb.bin
endif
ifeq ($(CONFIG_SPL_FIT_GENERATOR),"arch/arm/mach-rockchip/make_fit_atf.py")
U_BOOT_ITS_DEPS += u-boot
endif
$(U_BOOT_ITS): $(U_BOOT_ITS_DEPS) FORCE$(srctree)/$(CONFIG_SPL_FIT_GENERATOR) \$(patsubst %,arch/$(ARCH)/dts/%.dtb,$(subst ",,$(CONFIG_OF_LIST))) > $@
endif
endififdef CONFIG_SPL_LOAD_FIT
MKIMAGEFLAGS_u-boot.img = -f auto -A $(ARCH) -T firmware -C none -O u-boot \-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \-p $(CONFIG_FIT_EXTERNAL_OFFSET) \-n "U-Boot $(UBOOTRELEASE) for $(BOARD) board" -E \$(patsubst %,-b arch/$(ARCH)/dts/%.dtb,$(subst ",,$(CONFIG_OF_LIST))) \$(patsubst %,-b arch/$(ARCH)/dts/%.dtbo,$(subst ",,$(CONFIG_OF_OVERLAY_LIST)))
else
MKIMAGEFLAGS_u-boot.img = -A $(ARCH) -T firmware -C none -O u-boot \-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \-n "U-Boot $(UBOOTRELEASE) for $(BOARD) board"
MKIMAGEFLAGS_u-boot-ivt.img = -A $(ARCH) -T firmware_ivt -C none -O u-boot \-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \-n "U-Boot $(UBOOTRELEASE) for $(BOARD) board"
u-boot-ivt.img: MKIMAGEOUTPUT = u-boot-ivt.img.log
endifMKIMAGEFLAGS_u-boot-dtb.img = $(MKIMAGEFLAGS_u-boot.img)# Some boards have the kwbimage.cfg file written in advance, while some
# other boards generate it on the fly during the build in the build tree.
# Let's check if the file exists in the build tree first, otherwise we
# fall back to use the one in the source tree.
KWD_CONFIG_FILE = $(shell \if [ -f $(objtree)/$(CONFIG_SYS_KWD_CONFIG:"%"=%) ]; then \echo -n $(objtree)/$(CONFIG_SYS_KWD_CONFIG:"%"=%); \else \echo -n $(srctree)/$(CONFIG_SYS_KWD_CONFIG:"%"=%); \fi)MKIMAGEFLAGS_u-boot.kwb = -n $(KWD_CONFIG_FILE) \-T kwbimage -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE)MKIMAGEFLAGS_u-boot-spl.kwb = -n $(KWD_CONFIG_FILE) \-T kwbimage -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) \$(if $(KEYDIR),-k $(KEYDIR))MKIMAGEFLAGS_u-boot.pbl = -n $(srctree)/$(CONFIG_SYS_FSL_PBL_RCW:"%"=%) \-R $(srctree)/$(CONFIG_SYS_FSL_PBL_PBI:"%"=%) -T pblimageifeq ($(CONFIG_MPC85xx)$(CONFIG_OF_SEPARATE),yy)
UBOOT_BIN := u-boot-with-dtb.bin
else
UBOOT_BIN := u-boot.bin
endifMKIMAGEFLAGS_u-boot-lzma.img = -A $(ARCH) -T standalone -C lzma -O u-boot \-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \-n "U-Boot $(UBOOTRELEASE) for $(BOARD) board"u-boot.bin.lzma: u-boot.bin FORCE$(call if_changed,lzma)u-boot-lzma.img: u-boot.bin.lzma FORCE$(call if_changed,mkimage)u-boot-dtb.img u-boot.img u-boot.kwb u-boot.pbl u-boot-ivt.img: \$(if $(CONFIG_SPL_LOAD_FIT),u-boot-nodtb.bin \$(if $(CONFIG_OF_SEPARATE)$(CONFIG_OF_EMBED)$(CONFIG_OF_HOSTFILE),dts/dt.dtb) \,$(UBOOT_BIN)) FORCE$(call if_changed,mkimage)$(BOARD_SIZE_CHECK)ifeq ($(CONFIG_SPL_LOAD_FIT_FULL),y)
MKIMAGEFLAGS_u-boot.itb =
else
MKIMAGEFLAGS_u-boot.itb = -E
endififdef U_BOOT_ITS
u-boot.itb: u-boot-nodtb.bin \$(if $(CONFIG_OF_SEPARATE)$(CONFIG_OF_EMBED)$(CONFIG_OF_HOSTFILE),dts/dt.dtb) \$(U_BOOT_ITS) FORCE$(call if_changed,mkfitimage)$(BOARD_SIZE_CHECK)
endifu-boot-spl.kwb: u-boot.img spl/u-boot-spl.bin FORCE$(call if_changed,mkimage)u-boot.sha1:  u-boot.bintools/ubsha1 u-boot.binu-boot.dis:    u-boot$(OBJDUMP) -d $< > $@ifneq ($(CONFIG_SPL_PAYLOAD),)
SPL_PAYLOAD := $(CONFIG_SPL_PAYLOAD:"%"=%)
else
SPL_PAYLOAD := u-boot.bin
endifSPL_IMAGE := $(CONFIG_SPL_IMAGE:"%"=%)OBJCOPYFLAGS_u-boot-with-spl.bin = -I binary -O binary \--pad-to=$(CONFIG_SPL_PAD_TO)
u-boot-with-spl.bin: $(SPL_IMAGE) $(SPL_PAYLOAD) FORCE$(call if_changed,pad_cat)ifeq ($(CONFIG_ARCH_ROCKCHIP),y)# TPL + SPL
ifeq ($(CONFIG_SPL)$(CONFIG_TPL),yy)
MKIMAGEFLAGS_u-boot-tpl-rockchip.bin = -n $(CONFIG_SYS_SOC) -T rksd
tpl/u-boot-tpl-rockchip.bin: tpl/u-boot-tpl.bin FORCE$(call if_changed,mkimage)
idbloader.img: tpl/u-boot-tpl-rockchip.bin spl/u-boot-spl.bin FORCE$(call if_changed,cat)
else
MKIMAGEFLAGS_idbloader.img = -n $(CONFIG_SYS_SOC) -T rksd
idbloader.img: spl/u-boot-spl.bin FORCE$(call if_changed,mkimage)
endififeq ($(CONFIG_ARM64),y)
OBJCOPYFLAGS_u-boot-rockchip.bin = -I binary -O binary \--pad-to=$(CONFIG_SPL_PAD_TO) --gap-fill=0xff
u-boot-rockchip.bin: idbloader.img u-boot.itb FORCE$(call if_changed,pad_cat)
endif # CONFIG_ARM64endif # CONFIG_ARCH_ROCKCHIPifeq ($(CONFIG_ARCH_LPC32XX)$(CONFIG_SPL),yy)
MKIMAGEFLAGS_lpc32xx-spl.img = -T lpc32xximage -a $(CONFIG_SPL_TEXT_BASE)lpc32xx-spl.img: spl/u-boot-spl.bin FORCE$(call if_changed,mkimage)OBJCOPYFLAGS_lpc32xx-boot-0.bin = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO)lpc32xx-boot-0.bin: lpc32xx-spl.img FORCE$(call if_changed,objcopy)OBJCOPYFLAGS_lpc32xx-boot-1.bin = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO)lpc32xx-boot-1.bin: lpc32xx-spl.img FORCE$(call if_changed,objcopy)lpc32xx-full.bin: lpc32xx-boot-0.bin lpc32xx-boot-1.bin u-boot.img FORCE$(call if_changed,cat)endifOBJCOPYFLAGS_u-boot-with-tpl.bin = -I binary -O binary \--pad-to=$(CONFIG_TPL_PAD_TO)
tpl/u-boot-with-tpl.bin: tpl/u-boot-tpl.bin u-boot.bin FORCE$(call if_changed,pad_cat)SPL: spl/u-boot-spl.bin FORCE$(Q)$(MAKE) $(build)=arch/arm/mach-imx $@ifeq ($(CONFIG_ARCH_IMX8M)$(CONFIG_ARCH_IMX8), y)
ifeq ($(CONFIG_SPL_LOAD_IMX_CONTAINER), y)
u-boot.cnt: u-boot.bin FORCE$(Q)$(MAKE) $(build)=arch/arm/mach-imx $@flash.bin: spl/u-boot-spl.bin u-boot.cnt FORCE$(Q)$(MAKE) $(build)=arch/arm/mach-imx $@
else
flash.bin: spl/u-boot-spl.bin u-boot.itb FORCE$(Q)$(MAKE) $(build)=arch/arm/mach-imx $@
endif
endifu-boot-with-spl.imx u-boot-with-nand-spl.imx: SPL u-boot.bin FORCE$(Q)$(MAKE) $(build)=arch/arm/mach-imx $@MKIMAGEFLAGS_u-boot.ubl = -n $(UBL_CONFIG) -T ublimage -e $(CONFIG_SYS_TEXT_BASE)u-boot.ubl: u-boot-with-spl.bin FORCE$(call if_changed,mkimage)MKIMAGEFLAGS_u-boot-spl.ais = -s -n $(if $(CONFIG_AIS_CONFIG_FILE), \$(srctree)/$(CONFIG_AIS_CONFIG_FILE:"%"=%),"/dev/null") \-T aisimage -e $(CONFIG_SPL_TEXT_BASE)
spl/u-boot-spl.ais: spl/u-boot-spl.bin FORCE$(call if_changed,mkimage)OBJCOPYFLAGS_u-boot.ais = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO)
u-boot.ais: spl/u-boot-spl.ais u-boot.img FORCE$(call if_changed,pad_cat)u-boot-signed.sb: u-boot.bin spl/u-boot-spl.bin$(Q)$(MAKE) $(build)=arch/arm/cpu/arm926ejs/mxs u-boot-signed.sb
u-boot.sb: u-boot.bin spl/u-boot-spl.bin$(Q)$(MAKE) $(build)=arch/arm/cpu/arm926ejs/mxs u-boot.sb# On x600 (SPEAr600) U-Boot is appended to U-Boot SPL.
# Both images are created using mkimage (crc etc), so that the ROM
# bootloader can check its integrity. Padding needs to be done to the
# SPL image (with mkimage header) and not the binary. Otherwise the resulting image
# which is loaded/copied by the ROM bootloader to SRAM doesn't fit.
# The resulting image containing both U-Boot images is called u-boot.spr
MKIMAGEFLAGS_u-boot-spl.img = -A $(ARCH) -T firmware -C none \-a $(CONFIG_SPL_TEXT_BASE) -e $(CONFIG_SPL_TEXT_BASE) -n XLOADER
spl/u-boot-spl.img: spl/u-boot-spl.bin FORCE$(call if_changed,mkimage)OBJCOPYFLAGS_u-boot.spr = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO) \--gap-fill=0xff
u-boot.spr: spl/u-boot-spl.img u-boot.img FORCE$(call if_changed,pad_cat)ifneq ($(CONFIG_ARCH_SOCFPGA),)
quiet_cmd_gensplx4 = GENSPLX4 $@
cmd_gensplx4 = cat  spl/u-boot-spl.sfp spl/u-boot-spl.sfp   \spl/u-boot-spl.sfp spl/u-boot-spl.sfp > $@ || rm -f $@
spl/u-boot-splx4.sfp: spl/u-boot-spl.sfp FORCE$(call if_changed,gensplx4)quiet_cmd_socboot = SOCBOOT $@
cmd_socboot = cat   spl/u-boot-splx4.sfp u-boot.img > $@ || rm -f $@
u-boot-with-spl.sfp: spl/u-boot-splx4.sfp u-boot.img FORCE$(call if_changed,socboot)quiet_cmd_gensplpadx4 = GENSPLPADX4 $@
cmd_gensplpadx4 =  dd if=/dev/zero of=spl/u-boot-spl.pad bs=64 count=1024 ; \cat  spl/u-boot-spl.sfp spl/u-boot-spl.pad \spl/u-boot-spl.sfp spl/u-boot-spl.pad \spl/u-boot-spl.sfp spl/u-boot-spl.pad \spl/u-boot-spl.sfp spl/u-boot-spl.pad > $@ || \rm -f $@ spl/u-boot-spl.pad
u-boot-spl-padx4.sfp: spl/u-boot-spl.sfp FORCE$(call if_changed,gensplpadx4)quiet_cmd_socnandboot = SOCNANDBOOT $@
cmd_socnandboot = cat   u-boot-spl-padx4.sfp u-boot.img > $@ || rm -f $@
u-boot-with-nand-spl.sfp: u-boot-spl-padx4.sfp u-boot.img FORCE$(call if_changed,socnandboot)endififeq ($(CONFIG_MPC85xx)$(CONFIG_OF_SEPARATE),yy)
u-boot-with-dtb.bin: u-boot.bin u-boot.dtb \$(if $(CONFIG_MPC85XX_HAVE_RESET_VECTOR), u-boot-br.bin) FORCE$(call if_changed,binman)ifeq ($(CONFIG_MPC85XX_HAVE_RESET_VECTOR),y)
OBJCOPYFLAGS_u-boot-br.bin := -O binary -j .bootpg -j .resetvec
u-boot-br.bin: u-boot FORCE$(call if_changed,objcopy)
endif
endifquiet_cmd_ldr = LD      $@
cmd_ldr = $(LD) $(LDFLAGS_$(@F)) \$(filter-out FORCE,$^) -o $@ifdef CONFIG_X86
OBJCOPYFLAGS_u-boot-x86-start16.bin := -O binary -j .start16
u-boot-x86-start16.bin: u-boot FORCE$(call if_changed,objcopy)OBJCOPYFLAGS_u-boot-x86-reset16.bin := -O binary -j .resetvec
u-boot-x86-reset16.bin: u-boot FORCE$(call if_changed,objcopy)endif # CONFIG_X86OBJCOPYFLAGS_u-boot-app.efi := $(OBJCOPYFLAGS_EFI)
u-boot-app.efi: u-boot FORCE$(call if_changed,zobjcopy)u-boot.bin.o: u-boot.bin FORCE$(call if_changed,efipayload)u-boot-payload.lds: $(LDSCRIPT_EFI) FORCE$(call if_changed_dep,cpp_lds)# Rule to link the EFI payload which contains a stub and a U-Boot binary
quiet_cmd_u-boot_payload ?= LD      $@cmd_u-boot_payload ?= $(LD) $(LDFLAGS_EFI_PAYLOAD) -o $@ \-T u-boot-payload.lds arch/x86/cpu/call32.o \lib/efi/efi.o lib/efi/efi_stub.o u-boot.bin.o \$(addprefix arch/$(ARCH)/lib/,$(EFISTUB))u-boot-payload: u-boot.bin.o u-boot-payload.lds FORCE$(call if_changed,u-boot_payload)OBJCOPYFLAGS_u-boot-payload.efi := $(OBJCOPYFLAGS_EFI)
u-boot-payload.efi: u-boot-payload FORCE$(call if_changed,zobjcopy)u-boot-img.bin: spl/u-boot-spl.bin u-boot.img FORCE$(call if_changed,cat)#Add a target to create boot binary having SPL binary in PBI format
#concatenated with u-boot binary. It is need by PowerPC SoC having
#internal SRAM <= 512KB.
MKIMAGEFLAGS_u-boot-spl.pbl = -n $(srctree)/$(CONFIG_SYS_FSL_PBL_RCW:"%"=%) \-R $(srctree)/$(CONFIG_SYS_FSL_PBL_PBI:"%"=%) -T pblimage \-A $(ARCH) -a $(CONFIG_SPL_TEXT_BASE)spl/u-boot-spl.pbl: spl/u-boot-spl.bin FORCE$(call if_changed,mkimage)ifeq ($(ARCH),arm)
UBOOT_BINLOAD := u-boot.img
else
ifeq ($(CONFIG_MPC85xx)$(CONFIG_OF_SEPARATE),yy)
UBOOT_BINLOAD := u-boot-with-dtb.bin
else
UBOOT_BINLOAD := u-boot.bin
endif
endifOBJCOPYFLAGS_u-boot-with-spl-pbl.bin = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO) \--gap-fill=0xffu-boot-with-spl-pbl.bin: spl/u-boot-spl.pbl $(UBOOT_BINLOAD) FORCE$(call if_changed,pad_cat)# PPC4xx needs the SPL at the end of the image, since the reset vector
# is located at 0xfffffffc. So we can't use the "u-boot-img.bin" target
# and need to introduce a new build target with the full blown U-Boot
# at the start padded up to the start of the SPL image. And then concat
# the SPL image to the end.OBJCOPYFLAGS_u-boot-img-spl-at-end.bin := -I binary -O binary \--pad-to=$(CONFIG_UBOOT_PAD_TO) --gap-fill=0xff
u-boot-img-spl-at-end.bin: u-boot.img spl/u-boot-spl.bin FORCE$(call if_changed,pad_cat)quiet_cmd_u-boot-elf ?= LD      $@cmd_u-boot-elf ?= $(LD) u-boot-elf.o -o $@ \-T u-boot-elf.lds --defsym=$(CONFIG_PLATFORM_ELFENTRY)=$(CONFIG_SYS_TEXT_BASE) \-Ttext=$(CONFIG_SYS_TEXT_BASE)
u-boot.elf: u-boot.bin u-boot-elf.lds$(Q)$(OBJCOPY) -I binary $(PLATFORM_ELFFLAGS) $< u-boot-elf.o$(call if_changed,u-boot-elf)u-boot-elf.lds: arch/u-boot-elf.lds prepare FORCE$(call if_changed_dep,cpp_lds)# MediaTek's ARM-based u-boot needs a header to contains its load address
# which is parsed by the BootROM.
# If the SPL build is enabled, the header will be added to the spl binary,
# and the spl binary and the u-boot.img will be combined into one file.
# Otherwise the header will be added to the u-boot.bin directly.ifeq ($(CONFIG_SPL),y)
spl/u-boot-spl-mtk.bin: spl/u-boot-spl
else
MKIMAGEFLAGS_u-boot-mtk.bin = -T mtk_image \-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) \-n "$(patsubst "%",%,$(CONFIG_MTK_BROM_HEADER_INFO))"u-boot-mtk.bin: u-boot.bin FORCE$(call if_changed,mkimage)
endifquiet_cmd_endian_swap = SWAP    $@cmd_endian_swap = $(srctree)/tools/endian-swap.py $< $@u-boot-swap.bin: u-boot.bin FORCE$(call if_changed,endian_swap)ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(ARCH)/Makefile.postlink)# Rule to link u-boot
# May be overridden by arch/$(ARCH)/config.mk
quiet_cmd_u-boot__ ?= LD      $@cmd_u-boot__ ?= $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_u-boot) -o $@ \-T u-boot.lds $(u-boot-init)                             \--start-group $(u-boot-main) --end-group                 \$(PLATFORM_LIBS) -Map u-boot.map;                        \$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)quiet_cmd_smap = GEN     common/system_map.o
cmd_smap = \smap=`$(call SYSTEM_MAP,u-boot) | \awk '$$2 ~ /[tTwW]/ {printf $$1 $$3 "\\\\000"}'` ; \$(CC) $(c_flags) -DSYSTEM_MAP="\"$${smap}\"" \-c $(srctree)/common/system_map.c -o common/system_map.ou-boot:    $(u-boot-init) $(u-boot-main) u-boot.lds FORCE+$(call if_changed,u-boot__)
ifeq ($(CONFIG_KALLSYMS),y)$(call cmd,smap)$(call cmd,u-boot__) common/system_map.o
endififeq ($(CONFIG_RISCV),y)@tools/prelink-riscv $@ 0
endifquiet_cmd_sym ?= SYM     $@cmd_sym ?= $(OBJDUMP) -t $< > $@
u-boot.sym: u-boot FORCE$(call if_changed,sym)# The actual objects are generated when descending,
# make sure no implicit rule kicks in
$(sort $(u-boot-init) $(u-boot-main)): $(u-boot-dirs) ;# Handle descending into subdirectories listed in $(u-boot-dirs)
# Preset locale variables to speed up the build process. Limit locale
# tweaks to this spot to avoid wrong language settings when running
# make menuconfig etc.
# Error messages still appears in the original languagePHONY += $(u-boot-dirs)
$(u-boot-dirs): prepare scripts$(Q)$(MAKE) $(build)=$@tools: prepare
# The "tools" are needed early
$(filter-out tools, $(u-boot-dirs)): tools
# The "examples" conditionally depend on U-Boot (say, when USE_PRIVATE_LIBGCC
# is "yes"), so compile examples after U-Boot is compiled.
examples: $(filter-out examples, $(u-boot-dirs))define filechk_uboot.releaseecho "$(UBOOTVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
endef# Store (new) UBOOTRELEASE string in include/config/uboot.release
include/config/uboot.release: include/config/auto.conf FORCE$(call filechk,uboot.release)# Things we need to do before we recursively start building the kernel
# or the modules are listed in "prepare".
# A multi level approach is used. prepareN is processed before prepareN-1.
# archprepare is used in arch Makefiles and when processed asm symlink,
# version.h and scripts_basic is processed / created.# Listed in dependency order
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3# prepare3 is used to check if we are building in a separate output directory,
# and if so do:
# 1) Check that make has not been executed in the kernel src $(srctree)
prepare3: include/config/uboot.release
ifneq ($(KBUILD_SRC),)@$(kecho) '  Using $(srctree) as source for U-Boot'$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \echo >&2 "  in the '$(srctree)' directory.";\/bin/false; \fi;
endif# prepare2 creates a makefile if using a separate output directory
prepare2: prepare3 outputmakefile cfgprepare1: prepare2 $(version_h) $(timestamp_h) $(dt_h) \include/config/auto.conf
ifeq ($(wildcard $(LDSCRIPT)),)@echo >&2 "  Could not find linker script."@/bin/false
endififeq ($(CONFIG_USE_DEFAULT_ENV_FILE),y)
prepare1: $(defaultenv_h)
endifarchprepare: prepare1 scripts_basicprepare0: archprepare FORCE$(Q)$(MAKE) $(build)=.# All the preparing..
prepare: prepare0# Generate some files
# ---------------------------------------------------------------------------define filechk_version.h(echo \#define PLAIN_VERSION \"$(UBOOTRELEASE)\"; \echo \#define U_BOOT_VERSION \"U-Boot \" PLAIN_VERSION; \echo \#define CC_VERSION_STRING \"$$(LC_ALL=C $(CC) --version | head -n 1)\"; \echo \#define LD_VERSION_STRING \"$$(LC_ALL=C $(LD) --version | head -n 1)\"; )
endef# The SOURCE_DATE_EPOCH mechanism requires a date that behaves like GNU date.
# The BSD date on the other hand behaves different and would produce errors
# with the misused '-d' switch.  Respect that and search a working date with
# well known pre- and suffixes for the GNU variant of date.
define filechk_timestamp.h(if test -n "$${SOURCE_DATE_EPOCH}"; then \SOURCE_DATE="@$${SOURCE_DATE_EPOCH}"; \DATE=""; \for date in gdate date.gnu date; do \$${date} -u -d "$${SOURCE_DATE}" >/dev/null 2>&1 && DATE="$${date}"; \done; \if test -n "$${DATE}"; then \LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_DATE "%b %d %C%y"'; \LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_TIME "%T"'; \LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_TZ "%z"'; \LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_DMI_DATE "%m/%d/%Y"'; \LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_BUILD_DATE 0x%Y%m%d'; \LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_EPOCH %s'; \else \return 42; \fi; \else \LC_ALL=C date +'#define U_BOOT_DATE "%b %d %C%y"'; \LC_ALL=C date +'#define U_BOOT_TIME "%T"'; \LC_ALL=C date +'#define U_BOOT_TZ "%z"'; \LC_ALL=C date +'#define U_BOOT_DMI_DATE "%m/%d/%Y"'; \LC_ALL=C date +'#define U_BOOT_BUILD_DATE 0x%Y%m%d'; \LC_ALL=C date +'#define U_BOOT_EPOCH %s'; \fi)
endefdefine filechk_defaultenv.h(grep -v '^#' | \grep -v '^$$' | \tr '\n' '\0' | \sed -e 's/\\\x0\s*//g' | \xxd -i ; echo ", 0x00" ; )
endefdefine filechk_dt.h(if test -n "$${DEVICE_TREE}"; then \echo \#define DEVICE_TREE \"$(DEVICE_TREE)\"; \else \echo \#define DEVICE_TREE CONFIG_DEFAULT_DEVICE_TREE; \fi)
endef$(version_h): include/config/uboot.release FORCE$(call filechk,version.h)$(timestamp_h): $(srctree)/Makefile FORCE$(call filechk,timestamp.h)$(dt_h): $(srctree)/Makefile FORCE$(call filechk,dt.h)$(defaultenv_h): $(CONFIG_DEFAULT_ENV_FILE:"%"=%) FORCE$(call filechk,defaultenv.h)# ---------------------------------------------------------------------------
quiet_cmd_cpp_lds = LDS     $@
cmd_cpp_lds = $(CPP) -Wp,-MD,$(depfile) $(cpp_flags) $(LDPPFLAGS) \-D__ASSEMBLY__ -x assembler-with-cpp -std=c99 -P -o $@ $<u-boot.lds: $(LDSCRIPT) prepare FORCE$(call if_changed_dep,cpp_lds)spl/u-boot-spl.bin: spl/u-boot-spl@:$(SPL_SIZE_CHECK)spl/u-boot-spl: tools prepare \$(if $(CONFIG_OF_SEPARATE)$(CONFIG_OF_EMBED)$(CONFIG_SPL_OF_PLATDATA),dts/dt.dtb) \$(if $(CONFIG_OF_SEPARATE)$(CONFIG_OF_EMBED)$(CONFIG_TPL_OF_PLATDATA),dts/dt.dtb)$(Q)$(MAKE) obj=spl -f $(srctree)/scripts/Makefile.spl allspl/sunxi-spl.bin: spl/u-boot-spl@:spl/sunxi-spl-with-ecc.bin: spl/sunxi-spl.bin@:spl/u-boot-spl.sfp: spl/u-boot-spl@:spl/boot.bin: spl/u-boot-spl@:tpl/u-boot-tpl.bin: tools prepare \$(if $(CONFIG_OF_SEPARATE)$(CONFIG_OF_EMBED)$(CONFIG_SPL_OF_PLATDATA),dts/dt.dtb)$(Q)$(MAKE) obj=tpl -f $(srctree)/scripts/Makefile.spl all$(TPL_SIZE_CHECK)TAG_SUBDIRS := $(patsubst %,$(srctree)/%,$(u-boot-dirs) include)FIND := find
FINDFLAGS := -Ltags ctags:ctags -w -o ctags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) \-name '*.[chS]' -print`ln -s ctags tagsetags:etags -a -o etags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) \-name '*.[chS]' -print`
cscope:$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) -name '*.[chS]' -print > \cscope.files@find $(TAG_SUBDIRS) -name '*.[chS]' -type l -print | \grep -xvf - cscope.files > cscope.files.no-symlinks; \mv cscope.files.no-symlinks cscope.filescscope -b -q -kSYSTEM_MAP = \$(NM) $1 | \grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | \LC_ALL=C sort
System.map: u-boot@$(call SYSTEM_MAP,$<) > $@########################################################################## ARM relocations should all be R_ARM_RELATIVE (32-bit) or
# R_AARCH64_RELATIVE (64-bit).
checkarmreloc: u-boot@RELOC="`$(CROSS_COMPILE)readelf -r -W $< | cut -d ' ' -f 4 | \grep R_A | sort -u`"; \if test "$$RELOC" != "R_ARM_RELATIVE" -a \"$$RELOC" != "R_AARCH64_RELATIVE"; then \echo "$< contains unexpected relocations: $$RELOC"; \false; \fitools/version.h: include/version.h$(Q)mkdir -p $(dir $@)$(call if_changed,copy)envtools: scripts_basic $(version_h) $(timestamp_h) tools/version.h$(Q)$(MAKE) $(build)=tools/envtools-only: export TOOLS_ONLY=y
tools-only: scripts_basic $(version_h) $(timestamp_h) tools/version.h$(Q)$(MAKE) $(build)=toolstools-all: export HOST_TOOLS_ALL=y
tools-all: envtools tools ;cross_tools: export CROSS_BUILD_TOOLS=y
cross_tools: tools ;.PHONY : CHANGELOG
CHANGELOG:git log --no-merges U-Boot-1_1_5.. | \unexpand -a | sed -e 's/\s\s*$$//' > $@############################################################################
# Cleaning is done on three levels.
# make clean     Delete most generated files
#                Leave enough to build external modules
# make mrproper  Delete the current configuration, and all generated files
# make distclean Remove editor backup files, patch leftover files and the like# Directories & files removed with 'make clean'
CLEAN_DIRS  += $(MODVERDIR) \$(foreach d, spl tpl, $(patsubst %,$d/%, \$(filter-out include, $(shell ls -1 $d 2>/dev/null))))CLEAN_FILES += include/bmp_logo.h include/bmp_logo_data.h tools/version.h \boot* u-boot* MLO* SPL System.map fit-dtb.blob* \u-boot-ivt.img.log u-boot-dtb.imx.log SPL.log u-boot.imx.log \lpc32xx-* bl31.c bl31.elf bl31_*.bin image.map tispl.bin* \idbloader.img flash.bin flash.log defconfig# Directories & files removed with 'make mrproper'
MRPROPER_DIRS  += include/config include/generated spl tpl \.tmp_objdiff doc/output
MRPROPER_FILES += .config .config.old include/autoconf.mk* include/config.h \ctags etags tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \drivers/video/fonts/*.S# clean - Delete most, but leave enough to build external modules
#
clean: rm-dirs  := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)clean-dirs := $(foreach f,$(u-boot-alldirs),$(if $(wildcard $(srctree)/$f/Makefile),$f))clean-dirs      := $(addprefix _clean_, $(clean-dirs))PHONY += $(clean-dirs) clean archclean
$(clean-dirs):$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)clean: $(clean-dirs)$(call cmd,rmdirs)$(call cmd,rmfiles)@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \-o -name '*.ko.*' -o -name '*.su' -o -name '*.pyc' \-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \-o -name '*.lex.c' -o -name '*.tab.[ch]' \-o -name '*.asn1.[ch]' \-o -name '*.symtypes' -o -name 'modules.order' \-o -name modules.builtin -o -name '.tmp_*.o.*' \-o -name 'dsdt.aml' -o -name 'dsdt.asl.tmp' -o -name 'dsdt.c' \-o -name '*.efi' -o -name '*.gcno' -o -name '*.so' \) \-type f -print | xargs rm -f# mrproper - Delete all generated files, including .config
#
mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
mrproper-dirs      := $(addprefix _mrproper_,scripts)PHONY += $(mrproper-dirs) mrproper archmrproper
$(mrproper-dirs):$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)mrproper: clean $(mrproper-dirs)$(call cmd,rmdirs)$(call cmd,rmfiles)@rm -f arch/*/include/asm/arch# distclean
#
PHONY += distcleandistclean: mrproper@find $(srctree) $(RCS_FIND_IGNORE) \\( -name '*.orig' -o -name '*.rej' -o -name '*~' \-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \-o -name '.*.rej' -o -name '*%' -o -name 'core' \-o -name '*.pyc' \) \-type f -print | xargs rm -f@rm -f boards.cfg CHANGELOGbackup:F=`basename $(srctree)` ; cd .. ; \gtar --force-local -zcvf `LC_ALL=C date "+$$F-%Y-%m-%d-%T.tar.gz"` $$Fhelp:@echo  'Cleaning targets:'@echo  '  clean         - Remove most generated files but keep the config'@echo  '  mrproper      - Remove all generated files + config + various backup files'@echo  '  distclean      - mrproper + remove editor backup and patch files'@echo  ''@echo  'Configuration targets:'@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help@echo  ''@echo  'Test targets:'@echo  ''@echo  '  check           - Run all automated tests that use sandbox'@echo  '  qcheck          - Run quick automated tests that use sandbox'@echo  '  tcheck          - Run quick automated tests on tools'@echo  ''@echo  'Other generic targets:'@echo  '  all          - Build all necessary images depending on configuration'@echo  '  tests       - Build U-Boot for sandbox and run tests'@echo  '* u-boot     - Build the bare u-boot'@echo  '  dir/            - Build all files in dir and below'@echo  '  dir/file.[oisS] - Build specified target only'@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'@echo  '                    (requires a recent binutils and recent build (System.map))'@echo  '  tags/ctags    - Generate ctags file for editors'@echo  '  etags         - Generate etags file for editors'@echo  '  cscope    - Generate cscope index'@echo  '  ubootrelease    - Output the release version string (use with make -s)'@echo  '  ubootversion     - Output the version stored in Makefile (use with make -s)'@echo  "  cfg          - Don't build, just create the .cfg files"@echo  "  envtools      - Build only the target-side environment tools"@echo  ''@echo  'Static analysers'@echo  '  checkstack      - Generate a list of stack hogs'@echo  '  coccicheck      - Execute static code analysis with Coccinelle'@echo  ''@echo  'Documentation targets:'@$(MAKE) -f $(srctree)/doc/Makefile dochelp@echo  ''@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'@echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'@echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'@echo  '       1: warnings which may be relevant and do not occur too often'@echo  '     2: warnings which occur quite often but may still be relevant'@echo  '        3: more obscure warnings, can most likely be ignored'@echo  '     Multiple levels can be combined with W=12 or W=123'@echo  ''@echo  'Execute "make" or "make all" to build all targets marked with [*] '@echo  'For further info see the ./README file'tests check:$(srctree)/test/runqcheck:$(srctree)/test/run quicktcheck:$(srctree)/test/run tools# Documentation targets
# ---------------------------------------------------------------------------
DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \linkcheckdocs dochelp refcheckdocs
PHONY += $(DOC_TARGETS)
$(DOC_TARGETS): scripts_basic FORCE$(Q)$(MAKE) $(build)=doc $@endif #ifeq ($(config-targets),1)
endif #ifeq ($(mixed-targets),1)PHONY += checkstack ubootrelease ubootversioncheckstack:$(OBJDUMP) -d u-boot $$(find . -name u-boot-spl) | \$(PERL) $(src)/scripts/checkstack.pl $(ARCH)ubootrelease:@echo "$(UBOOTVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"ubootversion:@echo $(UBOOTVERSION)# Single targets
# ---------------------------------------------------------------------------
# Single targets are compatible with:
# - build with mixed source and output
# - build with separate output dir 'make O=...'
# - external modules
#
#  target-dir => where to store outputfile
#  build-dir  => directory in kernel source tree to useifeq ($(KBUILD_EXTMOD),)build-dir  = $(patsubst %/,%,$(dir $@))target-dir = $(dir $@)
elsezap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
endif%.s: %.c prepare scripts FORCE$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.i: %.c prepare scripts FORCE$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.o: %.c prepare scripts FORCE$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.lst: %.c prepare scripts FORCE$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.s: %.S prepare scripts FORCE$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.o: %.S prepare scripts FORCE$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.symtypes: %.c prepare scripts FORCE$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)# Modules
/: prepare scripts FORCE$(cmd_crmodverdir)$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \$(build)=$(build-dir)
%/: prepare scripts FORCE$(cmd_crmodverdir)$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \$(build)=$(build-dir)
%.ko: prepare scripts FORCE$(cmd_crmodverdir)$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \$(build)=$(build-dir) $(@:.ko=.o)$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpostquiet_cmd_genenv = GENENV $@
cmd_genenv = $(OBJCOPY) --dump-section .rodata.default_environment=$@ env/common.o; \sed --in-place -e 's/\x00/\x0A/g' $@u-boot-initial-env: u-boot.bin$(call if_changed,genenv)# Consistency checks
# ---------------------------------------------------------------------------PHONY += coccicheckcoccicheck:$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@# FIXME Should go into a make.lib or something
# ===========================================================================quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))cmd_rmdirs = rm -rf $(rm-dirs)quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))cmd_rmfiles = rm -f $(rm-files)# read all saved command linescmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))ifneq ($(cmd_files),)$(cmd_files): ;   # Do not try to update included dependency filesinclude $(cmd_files)
endifendif  # skip-makefilePHONY += FORCE
FORCE:# Declare the contents of the PHONY variable as phony.  We keep that
# information in a variable so we can use it in if_changed and friends.
.PHONY: $(PHONY)

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