Makefile 64 KB

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  1. # SPDX-License-Identifier: GPL-2.0+
  2. VERSION = 2019
  3. PATCHLEVEL = 01
  4. SUBLEVEL =
  5. EXTRAVERSION = -rc3
  6. NAME =
  7. # *DOCUMENTATION*
  8. # To see a list of typical targets execute "make help"
  9. # More info can be located in ./README
  10. # Comments in this file are targeted only to the developer, do not
  11. # expect to learn how to build the kernel reading this file.
  12. # o Do not use make's built-in rules and variables
  13. # (this increases performance and avoids hard-to-debug behaviour);
  14. # o Look for make include files relative to root of kernel src
  15. MAKEFLAGS += -rR --include-dir=$(CURDIR)
  16. # Avoid funny character set dependencies
  17. unexport LC_ALL
  18. LC_COLLATE=C
  19. LC_NUMERIC=C
  20. export LC_COLLATE LC_NUMERIC
  21. # Avoid interference with shell env settings
  22. unexport GREP_OPTIONS
  23. # We are using a recursive build, so we need to do a little thinking
  24. # to get the ordering right.
  25. #
  26. # Most importantly: sub-Makefiles should only ever modify files in
  27. # their own directory. If in some directory we have a dependency on
  28. # a file in another dir (which doesn't happen often, but it's often
  29. # unavoidable when linking the built-in.o targets which finally
  30. # turn into vmlinux), we will call a sub make in that other dir, and
  31. # after that we are sure that everything which is in that other dir
  32. # is now up to date.
  33. #
  34. # The only cases where we need to modify files which have global
  35. # effects are thus separated out and done before the recursive
  36. # descending is started. They are now explicitly listed as the
  37. # prepare rule.
  38. # Beautify output
  39. # ---------------------------------------------------------------------------
  40. #
  41. # Normally, we echo the whole command before executing it. By making
  42. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  43. # $(quiet) to choose other forms of output instead, e.g.
  44. #
  45. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  46. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  47. #
  48. # If $(quiet) is empty, the whole command will be printed.
  49. # If it is set to "quiet_", only the short version will be printed.
  50. # If it is set to "silent_", nothing will be printed at all, since
  51. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  52. #
  53. # A simple variant is to prefix commands with $(Q) - that's useful
  54. # for commands that shall be hidden in non-verbose mode.
  55. #
  56. # $(Q)ln $@ :<
  57. #
  58. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  59. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  60. #
  61. # To put more focus on warnings, be less verbose as default
  62. # Use 'make V=1' to see the full commands
  63. ifeq ("$(origin V)", "command line")
  64. KBUILD_VERBOSE = $(V)
  65. endif
  66. ifndef KBUILD_VERBOSE
  67. KBUILD_VERBOSE = 0
  68. endif
  69. ifeq ($(KBUILD_VERBOSE),1)
  70. quiet =
  71. Q =
  72. else
  73. quiet=quiet_
  74. Q = @
  75. endif
  76. # If the user is running make -s (silent mode), suppress echoing of
  77. # commands
  78. ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
  79. ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
  80. quiet=silent_
  81. endif
  82. else # make-3.8x
  83. ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
  84. quiet=silent_
  85. endif
  86. endif
  87. export quiet Q KBUILD_VERBOSE
  88. # kbuild supports saving output files in a separate directory.
  89. # To locate output files in a separate directory two syntaxes are supported.
  90. # In both cases the working directory must be the root of the kernel src.
  91. # 1) O=
  92. # Use "make O=dir/to/store/output/files/"
  93. #
  94. # 2) Set KBUILD_OUTPUT
  95. # Set the environment variable KBUILD_OUTPUT to point to the directory
  96. # where the output files shall be placed.
  97. # export KBUILD_OUTPUT=dir/to/store/output/files/
  98. # make
  99. #
  100. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  101. # variable.
  102. # KBUILD_SRC is set on invocation of make in OBJ directory
  103. # KBUILD_SRC is not intended to be used by the regular user (for now)
  104. ifeq ($(KBUILD_SRC),)
  105. # OK, Make called in directory where kernel src resides
  106. # Do we want to locate output files in a separate directory?
  107. ifeq ("$(origin O)", "command line")
  108. KBUILD_OUTPUT := $(O)
  109. endif
  110. # That's our default target when none is given on the command line
  111. PHONY := _all
  112. _all:
  113. # Cancel implicit rules on top Makefile
  114. $(CURDIR)/Makefile Makefile: ;
  115. ifneq ($(KBUILD_OUTPUT),)
  116. # Invoke a second make in the output directory, passing relevant variables
  117. # check that the output directory actually exists
  118. saved-output := $(KBUILD_OUTPUT)
  119. KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
  120. && /bin/pwd)
  121. $(if $(KBUILD_OUTPUT),, \
  122. $(error failed to create output directory "$(saved-output)"))
  123. PHONY += $(MAKECMDGOALS) sub-make
  124. $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
  125. @:
  126. sub-make: FORCE
  127. $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
  128. -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
  129. # Leave processing to above invocation of make
  130. skip-makefile := 1
  131. endif # ifneq ($(KBUILD_OUTPUT),)
  132. endif # ifeq ($(KBUILD_SRC),)
  133. # We process the rest of the Makefile if this is the final invocation of make
  134. ifeq ($(skip-makefile),)
  135. # Do not print "Entering directory ...",
  136. # but we want to display it when entering to the output directory
  137. # so that IDEs/editors are able to understand relative filenames.
  138. MAKEFLAGS += --no-print-directory
  139. # Call a source code checker (by default, "sparse") as part of the
  140. # C compilation.
  141. #
  142. # Use 'make C=1' to enable checking of only re-compiled files.
  143. # Use 'make C=2' to enable checking of *all* source files, regardless
  144. # of whether they are re-compiled or not.
  145. #
  146. # See the file "Documentation/sparse.txt" for more details, including
  147. # where to get the "sparse" utility.
  148. ifeq ("$(origin C)", "command line")
  149. KBUILD_CHECKSRC = $(C)
  150. endif
  151. ifndef KBUILD_CHECKSRC
  152. KBUILD_CHECKSRC = 0
  153. endif
  154. # Use make M=dir to specify directory of external module to build
  155. # Old syntax make ... SUBDIRS=$PWD is still supported
  156. # Setting the environment variable KBUILD_EXTMOD take precedence
  157. ifdef SUBDIRS
  158. KBUILD_EXTMOD ?= $(SUBDIRS)
  159. endif
  160. ifeq ("$(origin M)", "command line")
  161. KBUILD_EXTMOD := $(M)
  162. endif
  163. # If building an external module we do not care about the all: rule
  164. # but instead _all depend on modules
  165. PHONY += all
  166. ifeq ($(KBUILD_EXTMOD),)
  167. _all: all
  168. else
  169. _all: modules
  170. endif
  171. ifeq ($(KBUILD_SRC),)
  172. # building in the source tree
  173. srctree := .
  174. else
  175. ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
  176. # building in a subdirectory of the source tree
  177. srctree := ..
  178. else
  179. srctree := $(KBUILD_SRC)
  180. endif
  181. endif
  182. objtree := .
  183. src := $(srctree)
  184. obj := $(objtree)
  185. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  186. export srctree objtree VPATH
  187. # Make sure CDPATH settings don't interfere
  188. unexport CDPATH
  189. #########################################################################
  190. HOSTARCH := $(shell uname -m | \
  191. sed -e s/i.86/x86/ \
  192. -e s/sun4u/sparc64/ \
  193. -e s/arm.*/arm/ \
  194. -e s/sa110/arm/ \
  195. -e s/ppc64/powerpc/ \
  196. -e s/ppc/powerpc/ \
  197. -e s/macppc/powerpc/\
  198. -e s/sh.*/sh/)
  199. HOSTOS := $(shell uname -s | tr '[:upper:]' '[:lower:]' | \
  200. sed -e 's/\(cygwin\).*/cygwin/')
  201. export HOSTARCH HOSTOS
  202. #########################################################################
  203. # set default to nothing for native builds
  204. ifeq ($(HOSTARCH),$(ARCH))
  205. CROSS_COMPILE ?=
  206. endif
  207. KCONFIG_CONFIG ?= .config
  208. export KCONFIG_CONFIG
  209. # SHELL used by kbuild
  210. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  211. else if [ -x /bin/bash ]; then echo /bin/bash; \
  212. else echo sh; fi ; fi)
  213. HOSTCC = cc
  214. HOSTCXX = c++
  215. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
  216. $(if $(CONFIG_TOOLS_DEBUG),-g)
  217. HOSTCXXFLAGS = -O2
  218. # With the move to GCC 6, we have implicitly upgraded our language
  219. # standard to GNU11 (see https://gcc.gnu.org/gcc-5/porting_to.html).
  220. # Some Linux distributions (including RHEL7, SLES13, Debian 8) still
  221. # have older compilers as their default, so we make it explicit for
  222. # these that our host tools are GNU11 (i.e. C11 w/ GNU extensions).
  223. CSTD_FLAG := -std=gnu11
  224. ifeq ($(HOSTOS),linux)
  225. HOSTCFLAGS += $(CSTD_FLAG)
  226. endif
  227. ifeq ($(HOSTOS),cygwin)
  228. HOSTCFLAGS += -ansi
  229. endif
  230. # Mac OS X / Darwin's C preprocessor is Apple specific. It
  231. # generates numerous errors and warnings. We want to bypass it
  232. # and use GNU C's cpp. To do this we pass the -traditional-cpp
  233. # option to the compiler. Note that the -traditional-cpp flag
  234. # DOES NOT have the same semantics as GNU C's flag, all it does
  235. # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
  236. #
  237. # Apple's linker is similar, thanks to the new 2 stage linking
  238. # multiple symbol definitions are treated as errors, hence the
  239. # -multiply_defined suppress option to turn off this error.
  240. #
  241. ifeq ($(HOSTOS),darwin)
  242. # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
  243. DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
  244. DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
  245. os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
  246. $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
  247. # Snow Leopards build environment has no longer restrictions as described above
  248. HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
  249. HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
  250. HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
  251. # since Lion (10.7) ASLR is on by default, but we use linker generated lists
  252. # in some host tools which is a problem then ... so disable ASLR for these
  253. # tools
  254. HOSTLDFLAGS += $(call os_x_before, 10, 7, "", "-Xlinker -no_pie")
  255. endif
  256. # Decide whether to build built-in, modular, or both.
  257. # Normally, just do built-in.
  258. KBUILD_MODULES :=
  259. KBUILD_BUILTIN := 1
  260. # If we have only "make modules", don't compile built-in objects.
  261. # When we're building modules with modversions, we need to consider
  262. # the built-in objects during the descend as well, in order to
  263. # make sure the checksums are up to date before we record them.
  264. ifeq ($(MAKECMDGOALS),modules)
  265. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  266. endif
  267. # If we have "make <whatever> modules", compile modules
  268. # in addition to whatever we do anyway.
  269. # Just "make" or "make all" shall build modules as well
  270. # U-Boot does not need modules
  271. #ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  272. # KBUILD_MODULES := 1
  273. #endif
  274. #ifeq ($(MAKECMDGOALS),)
  275. # KBUILD_MODULES := 1
  276. #endif
  277. export KBUILD_MODULES KBUILD_BUILTIN
  278. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  279. # We need some generic definitions (do not try to remake the file).
  280. scripts/Kbuild.include: ;
  281. include scripts/Kbuild.include
  282. # Make variables (CC, etc...)
  283. AS = $(CROSS_COMPILE)as
  284. # Always use GNU ld
  285. ifneq ($(shell $(CROSS_COMPILE)ld.bfd -v 2> /dev/null),)
  286. LD = $(CROSS_COMPILE)ld.bfd
  287. else
  288. LD = $(CROSS_COMPILE)ld
  289. endif
  290. CC = $(CROSS_COMPILE)gcc
  291. CPP = $(CC) -E
  292. AR = $(CROSS_COMPILE)ar
  293. NM = $(CROSS_COMPILE)nm
  294. LDR = $(CROSS_COMPILE)ldr
  295. STRIP = $(CROSS_COMPILE)strip
  296. OBJCOPY = $(CROSS_COMPILE)objcopy
  297. OBJDUMP = $(CROSS_COMPILE)objdump
  298. LEX = flex
  299. YACC = bison
  300. AWK = awk
  301. PERL = perl
  302. PYTHON ?= python
  303. PYTHON2 = python2
  304. PYTHON3 = python3
  305. DTC ?= $(objtree)/scripts/dtc/dtc
  306. CHECK = sparse
  307. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
  308. -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
  309. KBUILD_CPPFLAGS := -D__KERNEL__ -D__UBOOT__
  310. KBUILD_CFLAGS := -Wall -Wstrict-prototypes \
  311. -Wno-format-security \
  312. -fno-builtin -ffreestanding $(CSTD_FLAG)
  313. KBUILD_CFLAGS += -fshort-wchar -fno-strict-aliasing
  314. KBUILD_AFLAGS := -D__ASSEMBLY__
  315. # Don't generate position independent code
  316. KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
  317. KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
  318. # Read UBOOTRELEASE from include/config/uboot.release (if it exists)
  319. UBOOTRELEASE = $(shell cat include/config/uboot.release 2> /dev/null)
  320. UBOOTVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
  321. export VERSION PATCHLEVEL SUBLEVEL UBOOTRELEASE UBOOTVERSION
  322. export ARCH CPU BOARD VENDOR SOC CPUDIR BOARDDIR
  323. export CONFIG_SHELL HOSTCC HOSTCFLAGS HOSTLDFLAGS CROSS_COMPILE AS LD CC
  324. export CPP AR NM LDR STRIP OBJCOPY OBJDUMP
  325. export MAKE LEX YACC AWK PERL PYTHON PYTHON2 PYTHON3
  326. export HOSTCXX HOSTCXXFLAGS CHECK CHECKFLAGS DTC DTC_FLAGS
  327. export KBUILD_CPPFLAGS NOSTDINC_FLAGS UBOOTINCLUDE OBJCOPYFLAGS LDFLAGS
  328. export KBUILD_CFLAGS KBUILD_AFLAGS
  329. # When compiling out-of-tree modules, put MODVERDIR in the module
  330. # tree rather than in the kernel tree. The kernel tree might
  331. # even be read-only.
  332. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  333. # Files to ignore in find ... statements
  334. export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
  335. -name CVS -o -name .pc -o -name .hg -o -name .git \) \
  336. -prune -o
  337. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
  338. --exclude CVS --exclude .pc --exclude .hg --exclude .git
  339. # ===========================================================================
  340. # Rules shared between *config targets and build targets
  341. # Basic helpers built in scripts/
  342. PHONY += scripts_basic
  343. scripts_basic:
  344. $(Q)$(MAKE) $(build)=scripts/basic
  345. $(Q)rm -f .tmp_quiet_recordmcount
  346. # To avoid any implicit rule to kick in, define an empty command.
  347. scripts/basic/%: scripts_basic ;
  348. PHONY += outputmakefile
  349. # outputmakefile generates a Makefile in the output directory, if using a
  350. # separate output directory. This allows convenient use of make in the
  351. # output directory.
  352. outputmakefile:
  353. ifneq ($(KBUILD_SRC),)
  354. $(Q)ln -fsn $(srctree) source
  355. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  356. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  357. endif
  358. # To make sure we do not include .config for any of the *config targets
  359. # catch them early, and hand them over to scripts/kconfig/Makefile
  360. # It is allowed to specify more targets when calling make, including
  361. # mixing *config targets and build targets.
  362. # For example 'make oldconfig all'.
  363. # Detect when mixed targets is specified, and make a second invocation
  364. # of make so .config is not included in this case either (for *config).
  365. version_h := include/generated/version_autogenerated.h
  366. timestamp_h := include/generated/timestamp_autogenerated.h
  367. defaultenv_h := include/generated/defaultenv_autogenerated.h
  368. no-dot-config-targets := clean clobber mrproper distclean \
  369. help %docs check% coccicheck \
  370. ubootversion backup tests check qcheck
  371. config-targets := 0
  372. mixed-targets := 0
  373. dot-config := 1
  374. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  375. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  376. dot-config := 0
  377. endif
  378. endif
  379. ifeq ($(KBUILD_EXTMOD),)
  380. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  381. config-targets := 1
  382. ifneq ($(words $(MAKECMDGOALS)),1)
  383. mixed-targets := 1
  384. endif
  385. endif
  386. endif
  387. ifeq ($(mixed-targets),1)
  388. # ===========================================================================
  389. # We're called with mixed targets (*config and build targets).
  390. # Handle them one by one.
  391. PHONY += $(MAKECMDGOALS) __build_one_by_one
  392. $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
  393. @:
  394. __build_one_by_one:
  395. $(Q)set -e; \
  396. for i in $(MAKECMDGOALS); do \
  397. $(MAKE) -f $(srctree)/Makefile $$i; \
  398. done
  399. else
  400. ifeq ($(config-targets),1)
  401. # ===========================================================================
  402. # *config targets only - make sure prerequisites are updated, and descend
  403. # in scripts/kconfig to make the *config target
  404. KBUILD_DEFCONFIG := sandbox_defconfig
  405. export KBUILD_DEFCONFIG KBUILD_KCONFIG
  406. config: scripts_basic outputmakefile FORCE
  407. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  408. %config: scripts_basic outputmakefile FORCE
  409. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  410. else
  411. # ===========================================================================
  412. # Build targets only - this includes vmlinux, arch specific targets, clean
  413. # targets and others. In general all targets except *config targets.
  414. # Additional helpers built in scripts/
  415. # Carefully list dependencies so we do not try to build scripts twice
  416. # in parallel
  417. PHONY += scripts
  418. scripts: scripts_basic include/config/auto.conf
  419. $(Q)$(MAKE) $(build)=$(@)
  420. ifeq ($(dot-config),1)
  421. # Read in config
  422. -include include/config/auto.conf
  423. # Read in dependencies to all Kconfig* files, make sure to run
  424. # oldconfig if changes are detected.
  425. -include include/config/auto.conf.cmd
  426. # To avoid any implicit rule to kick in, define an empty command
  427. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  428. # If .config is newer than include/config/auto.conf, someone tinkered
  429. # with it and forgot to run make oldconfig.
  430. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  431. # we execute the config step to be sure to catch updated Kconfig files
  432. include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  433. $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
  434. @# If the following part fails, include/config/auto.conf should be
  435. @# deleted so "make silentoldconfig" will be re-run on the next build.
  436. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.autoconf || \
  437. { rm -f include/config/auto.conf; false; }
  438. @# include/config.h has been updated after "make silentoldconfig".
  439. @# We need to touch include/config/auto.conf so it gets newer
  440. @# than include/config.h.
  441. @# Otherwise, 'make silentoldconfig' would be invoked twice.
  442. $(Q)touch include/config/auto.conf
  443. u-boot.cfg spl/u-boot.cfg tpl/u-boot.cfg: include/config.h FORCE
  444. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.autoconf $(@)
  445. -include include/autoconf.mk
  446. -include include/autoconf.mk.dep
  447. # We want to include arch/$(ARCH)/config.mk only when include/config/auto.conf
  448. # is up-to-date. When we switch to a different board configuration, old CONFIG
  449. # macros are still remaining in include/config/auto.conf. Without the following
  450. # gimmick, wrong config.mk would be included leading nasty warnings/errors.
  451. ifneq ($(wildcard $(KCONFIG_CONFIG)),)
  452. ifneq ($(wildcard include/config/auto.conf),)
  453. autoconf_is_old := $(shell find . -path ./$(KCONFIG_CONFIG) -newer \
  454. include/config/auto.conf)
  455. ifeq ($(autoconf_is_old),)
  456. include config.mk
  457. include arch/$(ARCH)/Makefile
  458. endif
  459. endif
  460. endif
  461. # These are set by the arch-specific config.mk. Make sure they are exported
  462. # so they can be used when building an EFI application.
  463. export EFI_LDS # Filename of EFI link script in arch/$(ARCH)/lib
  464. export EFI_CRT0 # Filename of EFI CRT0 in arch/$(ARCH)/lib
  465. export EFI_RELOC # Filename of EFU relocation code in arch/$(ARCH)/lib
  466. export CFLAGS_EFI # Compiler flags to add when building EFI app
  467. export CFLAGS_NON_EFI # Compiler flags to remove when building EFI app
  468. export EFI_TARGET # binutils target if EFI is natively supported
  469. # If board code explicitly specified LDSCRIPT or CONFIG_SYS_LDSCRIPT, use
  470. # that (or fail if absent). Otherwise, search for a linker script in a
  471. # standard location.
  472. ifndef LDSCRIPT
  473. #LDSCRIPT := $(srctree)/board/$(BOARDDIR)/u-boot.lds.debug
  474. ifdef CONFIG_SYS_LDSCRIPT
  475. # need to strip off double quotes
  476. LDSCRIPT := $(srctree)/$(CONFIG_SYS_LDSCRIPT:"%"=%)
  477. endif
  478. endif
  479. # If there is no specified link script, we look in a number of places for it
  480. ifndef LDSCRIPT
  481. ifeq ($(wildcard $(LDSCRIPT)),)
  482. LDSCRIPT := $(srctree)/board/$(BOARDDIR)/u-boot.lds
  483. endif
  484. ifeq ($(wildcard $(LDSCRIPT)),)
  485. LDSCRIPT := $(srctree)/$(CPUDIR)/u-boot.lds
  486. endif
  487. ifeq ($(wildcard $(LDSCRIPT)),)
  488. LDSCRIPT := $(srctree)/arch/$(ARCH)/cpu/u-boot.lds
  489. endif
  490. endif
  491. else
  492. # Dummy target needed, because used as prerequisite
  493. include/config/auto.conf: ;
  494. endif # $(dot-config)
  495. #
  496. # Xtensa linker script cannot be preprocessed with -ansi because of
  497. # preprocessor operations on strings that don't make C identifiers.
  498. #
  499. ifeq ($(CONFIG_XTENSA),)
  500. LDPPFLAGS += -ansi
  501. endif
  502. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  503. KBUILD_CFLAGS += -Os
  504. else
  505. KBUILD_CFLAGS += -O2
  506. endif
  507. KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
  508. KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks)
  509. # change __FILE__ to the relative path from the srctree
  510. KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
  511. KBUILD_CFLAGS += -g
  512. # $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
  513. # option to the assembler.
  514. KBUILD_AFLAGS += -g
  515. # Report stack usage if supported
  516. # ARC tools based on GCC 7.1 has an issue with stack usage
  517. # with naked functions, see commit message for more details
  518. ifndef CONFIG_ARC
  519. ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-stack-usage.sh $(CC)),y)
  520. KBUILD_CFLAGS += -fstack-usage
  521. endif
  522. endif
  523. KBUILD_CFLAGS += $(call cc-option,-Wno-format-nonliteral)
  524. ifeq ($(cc-name),clang)
  525. KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
  526. KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
  527. KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
  528. KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
  529. KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
  530. endif
  531. # turn jbsr into jsr for m68k
  532. ifeq ($(ARCH),m68k)
  533. ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
  534. KBUILD_AFLAGS += -Wa,-gstabs,-S
  535. endif
  536. endif
  537. # Prohibit date/time macros, which would make the build non-deterministic
  538. KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
  539. include scripts/Makefile.extrawarn
  540. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  541. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  542. KBUILD_AFLAGS += $(KAFLAGS)
  543. KBUILD_CFLAGS += $(KCFLAGS)
  544. # Use UBOOTINCLUDE when you must reference the include/ directory.
  545. # Needed to be compatible with the O= option
  546. UBOOTINCLUDE := \
  547. -Iinclude \
  548. $(if $(KBUILD_SRC), -I$(srctree)/include) \
  549. $(if $(CONFIG_$(SPL_)SYS_THUMB_BUILD), \
  550. $(if $(CONFIG_HAS_THUMB2),, \
  551. -I$(srctree)/arch/$(ARCH)/thumb1/include),) \
  552. -I$(srctree)/arch/$(ARCH)/include \
  553. -include $(srctree)/include/linux/kconfig.h
  554. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  555. CHECKFLAGS += $(NOSTDINC_FLAGS)
  556. # FIX ME
  557. cpp_flags := $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) $(UBOOTINCLUDE) \
  558. $(NOSTDINC_FLAGS)
  559. c_flags := $(KBUILD_CFLAGS) $(cpp_flags)
  560. #########################################################################
  561. # U-Boot objects....order is important (i.e. start must be first)
  562. HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(srctree)/board/$(VENDOR)/common/Makefile),y,n)
  563. libs-y += lib/
  564. libs-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/
  565. libs-$(CONFIG_OF_EMBED) += dts/
  566. libs-y += fs/
  567. libs-y += net/
  568. libs-y += disk/
  569. libs-y += drivers/
  570. libs-y += drivers/dma/
  571. libs-y += drivers/gpio/
  572. libs-y += drivers/i2c/
  573. libs-y += drivers/mtd/
  574. libs-$(CONFIG_CMD_NAND) += drivers/mtd/nand/raw/
  575. libs-y += drivers/mtd/onenand/
  576. libs-$(CONFIG_CMD_UBI) += drivers/mtd/ubi/
  577. libs-y += drivers/mtd/spi/
  578. libs-y += drivers/net/
  579. libs-y += drivers/net/phy/
  580. libs-y += drivers/power/ \
  581. drivers/power/domain/ \
  582. drivers/power/fuel_gauge/ \
  583. drivers/power/mfd/ \
  584. drivers/power/pmic/ \
  585. drivers/power/battery/ \
  586. drivers/power/regulator/
  587. libs-y += drivers/spi/
  588. libs-$(CONFIG_FMAN_ENET) += drivers/net/fm/
  589. libs-$(CONFIG_SYS_FSL_DDR) += drivers/ddr/fsl/
  590. libs-$(CONFIG_SYS_FSL_MMDC) += drivers/ddr/fsl/
  591. libs-$(CONFIG_ALTERA_SDRAM) += drivers/ddr/altera/
  592. libs-y += drivers/serial/
  593. libs-y += drivers/usb/dwc3/
  594. libs-y += drivers/usb/common/
  595. libs-y += drivers/usb/emul/
  596. libs-y += drivers/usb/eth/
  597. libs-y += drivers/usb/gadget/
  598. libs-y += drivers/usb/gadget/udc/
  599. libs-y += drivers/usb/host/
  600. libs-y += drivers/usb/musb/
  601. libs-y += drivers/usb/musb-new/
  602. libs-y += drivers/usb/phy/
  603. libs-y += drivers/usb/ulpi/
  604. libs-y += cmd/
  605. libs-y += common/
  606. libs-y += env/
  607. libs-$(CONFIG_API) += api/
  608. libs-$(CONFIG_HAS_POST) += post/
  609. libs-$(CONFIG_UNIT_TEST) += test/ test/dm/
  610. libs-$(CONFIG_UT_ENV) += test/env/
  611. libs-$(CONFIG_UT_OVERLAY) += test/overlay/
  612. libs-y += $(if $(BOARDDIR),board/$(BOARDDIR)/)
  613. libs-y := $(sort $(libs-y))
  614. u-boot-dirs := $(patsubst %/,%,$(filter %/, $(libs-y))) tools examples
  615. u-boot-alldirs := $(sort $(u-boot-dirs) $(patsubst %/,%,$(filter %/, $(libs-))))
  616. libs-y := $(patsubst %/, %/built-in.o, $(libs-y))
  617. u-boot-init := $(head-y)
  618. u-boot-main := $(libs-y)
  619. # Add GCC lib
  620. ifeq ($(CONFIG_USE_PRIVATE_LIBGCC),y)
  621. PLATFORM_LIBGCC = arch/$(ARCH)/lib/lib.a
  622. else
  623. PLATFORM_LIBGCC := -L $(shell dirname `$(CC) $(c_flags) -print-libgcc-file-name`) -lgcc
  624. endif
  625. PLATFORM_LIBS += $(PLATFORM_LIBGCC)
  626. ifdef CONFIG_CC_COVERAGE
  627. KBUILD_CFLAGS += --coverage
  628. PLATFORM_LIBGCC += -lgcov
  629. endif
  630. export PLATFORM_LIBS
  631. export PLATFORM_LIBGCC
  632. # Special flags for CPP when processing the linker script.
  633. # Pass the version down so we can handle backwards compatibility
  634. # on the fly.
  635. LDPPFLAGS += \
  636. -include $(srctree)/include/u-boot/u-boot.lds.h \
  637. -DCPUDIR=$(CPUDIR) \
  638. $(shell $(LD) --version | \
  639. sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
  640. #########################################################################
  641. #########################################################################
  642. ifneq ($(CONFIG_BOARD_SIZE_LIMIT),)
  643. BOARD_SIZE_CHECK = \
  644. @actual=`wc -c $@ | awk '{print $$1}'`; \
  645. limit=`printf "%d" $(CONFIG_BOARD_SIZE_LIMIT)`; \
  646. if test $$actual -gt $$limit; then \
  647. echo "$@ exceeds file size limit:" >&2 ; \
  648. echo " limit: $$limit bytes" >&2 ; \
  649. echo " actual: $$actual bytes" >&2 ; \
  650. echo " excess: $$((actual - limit)) bytes" >&2; \
  651. exit 1; \
  652. fi
  653. else
  654. BOARD_SIZE_CHECK =
  655. endif
  656. # Statically apply RELA-style relocations (currently arm64 only)
  657. # This is useful for arm64 where static relocation needs to be performed on
  658. # the raw binary, but certain simulators only accept an ELF file (but don't
  659. # do the relocation).
  660. ifneq ($(CONFIG_STATIC_RELA),)
  661. # $(1) is u-boot ELF, $(2) is u-boot bin, $(3) is text base
  662. DO_STATIC_RELA = \
  663. start=$$($(NM) $(1) | grep __rel_dyn_start | cut -f 1 -d ' '); \
  664. end=$$($(NM) $(1) | grep __rel_dyn_end | cut -f 1 -d ' '); \
  665. tools/relocate-rela $(2) $(3) $$start $$end
  666. else
  667. DO_STATIC_RELA =
  668. endif
  669. # Always append ALL so that arch config.mk's can add custom ones
  670. ALL-y += u-boot.srec u-boot.bin u-boot.sym System.map binary_size_check
  671. ALL-$(CONFIG_ONENAND_U_BOOT) += u-boot-onenand.bin
  672. ifeq ($(CONFIG_SPL_FSL_PBL),y)
  673. ALL-$(CONFIG_RAMBOOT_PBL) += u-boot-with-spl-pbl.bin
  674. else
  675. ifneq ($(CONFIG_SECURE_BOOT), y)
  676. # For Secure Boot The Image needs to be signed and Header must also
  677. # be included. So The image has to be built explicitly
  678. ALL-$(CONFIG_RAMBOOT_PBL) += u-boot.pbl
  679. endif
  680. endif
  681. ALL-$(CONFIG_SPL) += spl/u-boot-spl.bin
  682. ifeq ($(CONFIG_MX6)$(CONFIG_SECURE_BOOT), yy)
  683. ALL-$(CONFIG_SPL_FRAMEWORK) += u-boot-ivt.img
  684. else
  685. ifeq ($(CONFIG_MX7)$(CONFIG_SECURE_BOOT), yy)
  686. ALL-$(CONFIG_SPL_FRAMEWORK) += u-boot-ivt.img
  687. else
  688. ALL-$(CONFIG_SPL_FRAMEWORK) += u-boot.img
  689. endif
  690. endif
  691. ALL-$(CONFIG_TPL) += tpl/u-boot-tpl.bin
  692. ALL-$(CONFIG_OF_SEPARATE) += u-boot.dtb
  693. ifeq ($(CONFIG_SPL_FRAMEWORK),y)
  694. ALL-$(CONFIG_OF_SEPARATE) += u-boot-dtb.img
  695. endif
  696. ALL-$(CONFIG_OF_HOSTFILE) += u-boot.dtb
  697. ifneq ($(CONFIG_SPL_TARGET),)
  698. ALL-$(CONFIG_SPL) += $(CONFIG_SPL_TARGET:"%"=%)
  699. endif
  700. ALL-$(CONFIG_REMAKE_ELF) += u-boot.elf
  701. ALL-$(CONFIG_EFI_APP) += u-boot-app.efi
  702. ALL-$(CONFIG_EFI_STUB) += u-boot-payload.efi
  703. ifneq ($(BUILD_ROM)$(CONFIG_BUILD_ROM),)
  704. ALL-$(CONFIG_X86_RESET_VECTOR) += u-boot.rom
  705. endif
  706. # Build a combined spl + u-boot image for sunxi
  707. ifeq ($(CONFIG_ARCH_SUNXI)$(CONFIG_SPL),yy)
  708. ALL-y += u-boot-sunxi-with-spl.bin
  709. endif
  710. # enable combined SPL/u-boot/dtb rules for tegra
  711. ifeq ($(CONFIG_TEGRA)$(CONFIG_SPL),yy)
  712. ALL-y += u-boot-tegra.bin u-boot-nodtb-tegra.bin
  713. ALL-$(CONFIG_OF_SEPARATE) += u-boot-dtb-tegra.bin
  714. endif
  715. ALL-$(CONFIG_ARCH_MEDIATEK) += u-boot-mtk.bin
  716. # Add optional build target if defined in board/cpu/soc headers
  717. ifneq ($(CONFIG_BUILD_TARGET),)
  718. ALL-y += $(CONFIG_BUILD_TARGET:"%"=%)
  719. endif
  720. ifneq ($(CONFIG_SYS_INIT_SP_BSS_OFFSET),)
  721. ALL-y += init_sp_bss_offset_check
  722. endif
  723. ifeq ($(CONFIG_MPC85xx)$(CONFIG_OF_SEPARATE),yy)
  724. ALL-y += u-boot-with-dtb.bin
  725. endif
  726. LDFLAGS_u-boot += $(LDFLAGS_FINAL)
  727. # Avoid 'Not enough room for program headers' error on binutils 2.28 onwards.
  728. LDFLAGS_u-boot += $(call ld-option, --no-dynamic-linker)
  729. ifeq ($(CONFIG_ARC)$(CONFIG_NIOS2)$(CONFIG_X86)$(CONFIG_XTENSA),)
  730. LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
  731. endif
  732. # Normally we fill empty space with 0xff
  733. quiet_cmd_objcopy = OBJCOPY $@
  734. cmd_objcopy = $(OBJCOPY) --gap-fill=0xff $(OBJCOPYFLAGS) \
  735. $(OBJCOPYFLAGS_$(@F)) $< $@
  736. # Provide a version which does not do this, for use by EFI
  737. quiet_cmd_zobjcopy = OBJCOPY $@
  738. cmd_zobjcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
  739. quiet_cmd_efipayload = OBJCOPY $@
  740. cmd_efipayload = $(OBJCOPY) -I binary -O $(EFIPAYLOAD_BFDTARGET) -B $(EFIPAYLOAD_BFDARCH) $< $@
  741. MKIMAGEOUTPUT ?= /dev/null
  742. quiet_cmd_mkimage = MKIMAGE $@
  743. cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
  744. >$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
  745. quiet_cmd_mkfitimage = MKIMAGE $@
  746. cmd_mkfitimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -f $(U_BOOT_ITS) -E $@ -p $(CONFIG_FIT_EXTERNAL_OFFSET)\
  747. >$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
  748. quiet_cmd_cat = CAT $@
  749. cmd_cat = cat $(filter-out $(PHONY), $^) > $@
  750. append = cat $(filter-out $< $(PHONY), $^) >> $@
  751. quiet_cmd_pad_cat = CAT $@
  752. cmd_pad_cat = $(cmd_objcopy) && $(append) || rm -f $@
  753. cfg: u-boot.cfg
  754. quiet_cmd_cfgcheck = CFGCHK $2
  755. cmd_cfgcheck = $(srctree)/scripts/check-config.sh $2 \
  756. $(srctree)/scripts/config_whitelist.txt $(srctree)
  757. all: $(ALL-y) cfg
  758. ifeq ($(CONFIG_DM_I2C_COMPAT)$(CONFIG_SANDBOX),y)
  759. @echo >&2 "===================== WARNING ======================"
  760. @echo >&2 "This board uses CONFIG_DM_I2C_COMPAT. Please remove"
  761. @echo >&2 "(possibly in a subsequent patch in your series)"
  762. @echo >&2 "before sending patches to the mailing list."
  763. @echo >&2 "===================================================="
  764. endif
  765. ifeq ($(CONFIG_MMC),y)
  766. ifneq ($(CONFIG_DM_MMC)$(CONFIG_OF_CONTROL)$(CONFIG_BLK),yyy)
  767. @echo >&2 "===================== WARNING ======================"
  768. @echo >&2 "This board does not use CONFIG_DM_MMC. Please update"
  769. @echo >&2 "the board to use CONFIG_DM_MMC before the v2019.04 release."
  770. @echo >&2 "Failure to update by the deadline may result in board removal."
  771. @echo >&2 "See doc/driver-model/MIGRATION.txt for more info."
  772. @echo >&2 "===================================================="
  773. endif
  774. endif
  775. ifeq ($(CONFIG_USB),y)
  776. ifneq ($(CONFIG_DM_USB)$(CONFIG_OF_CONTROL)$(CONFIG_BLK),yyy)
  777. @echo >&2 "===================== WARNING ======================"
  778. @echo >&2 "This board does not use CONFIG_DM_USB. Please update"
  779. @echo >&2 "the board to use CONFIG_DM_USB before the v2019.07 release."
  780. @echo >&2 "Failure to update by the deadline may result in board removal."
  781. @echo >&2 "See doc/driver-model/MIGRATION.txt for more info."
  782. @echo >&2 "===================================================="
  783. endif
  784. endif
  785. ifeq ($(CONFIG_LIBATA)$(CONFIG_MVSATA_IDE),y)
  786. ifneq ($(CONFIG_DM_SCSI),y)
  787. @echo >&2 "===================== WARNING ======================"
  788. @echo >&2 "This board does not use CONFIG_DM_SCSI. Please update"
  789. @echo >&2 "the storage controller to use CONFIG_DM_SCSI before the v2019.07 release."
  790. @echo >&2 "Failure to update by the deadline may result in board removal."
  791. @echo >&2 "See doc/driver-model/MIGRATION.txt for more info."
  792. @echo >&2 "===================================================="
  793. endif
  794. endif
  795. ifeq ($(CONFIG_OF_EMBED),y)
  796. @echo >&2 "===================== WARNING ======================"
  797. @echo >&2 "CONFIG_OF_EMBED is enabled. This option should only"
  798. @echo >&2 "be used for debugging purposes. Please use"
  799. @echo >&2 "CONFIG_OF_SEPARATE for boards in mainline."
  800. @echo >&2 "See doc/README.fdt-control for more info."
  801. @echo >&2 "===================================================="
  802. endif
  803. ifeq ($(CONFIG_SPI),y)
  804. ifneq ($(CONFIG_DM_SPI)$(CONFIG_OF_CONTROL),yy)
  805. @echo >&2 "===================== WARNING ======================"
  806. @echo >&2 "This board does not use CONFIG_DM_SPI. Please update"
  807. @echo >&2 "the board before v2019.04 for no dm conversion"
  808. @echo >&2 "and v2019.07 for partially dm converted drivers."
  809. @echo >&2 "Failure to update can lead to driver/board removal"
  810. @echo >&2 "See doc/driver-model/MIGRATION.txt for more info."
  811. @echo >&2 "===================================================="
  812. endif
  813. endif
  814. ifeq ($(CONFIG_SPI_FLASH),y)
  815. ifneq ($(CONFIG_DM_SPI_FLASH)$(CONFIG_OF_CONTROL),yy)
  816. @echo >&2 "===================== WARNING ======================"
  817. @echo >&2 "This board does not use CONFIG_DM_SPI_FLASH. Please update"
  818. @echo >&2 "the board to use CONFIG_SPI_FLASH before the v2019.07 release."
  819. @echo >&2 "Failure to update by the deadline may result in board removal."
  820. @echo >&2 "See doc/driver-model/MIGRATION.txt for more info."
  821. @echo >&2 "===================================================="
  822. endif
  823. endif
  824. @# Check that this build does not use CONFIG options that we do not
  825. @# know about unless they are in Kconfig. All the existing CONFIG
  826. @# options are whitelisted, so new ones should not be added.
  827. $(call cmd,cfgcheck,u-boot.cfg)
  828. PHONY += dtbs
  829. dtbs: dts/dt.dtb
  830. @:
  831. dts/dt.dtb: u-boot
  832. $(Q)$(MAKE) $(build)=dts dtbs
  833. quiet_cmd_copy = COPY $@
  834. cmd_copy = cp $< $@
  835. ifeq ($(CONFIG_MULTI_DTB_FIT),y)
  836. fit-dtb.blob: dts/dt.dtb FORCE
  837. $(call if_changed,mkimage)
  838. MKIMAGEFLAGS_fit-dtb.blob = -f auto -A $(ARCH) -T firmware -C none -O u-boot \
  839. -a 0 -e 0 -E \
  840. $(patsubst %,-b arch/$(ARCH)/dts/%.dtb,$(subst ",,$(CONFIG_OF_LIST))) -d /dev/null
  841. u-boot-fit-dtb.bin: u-boot-nodtb.bin fit-dtb.blob
  842. $(call if_changed,cat)
  843. u-boot.bin: u-boot-fit-dtb.bin FORCE
  844. $(call if_changed,copy)
  845. else ifeq ($(CONFIG_OF_SEPARATE),y)
  846. u-boot-dtb.bin: u-boot-nodtb.bin dts/dt.dtb FORCE
  847. $(call if_changed,cat)
  848. u-boot.bin: u-boot-dtb.bin FORCE
  849. $(call if_changed,copy)
  850. else
  851. u-boot.bin: u-boot-nodtb.bin FORCE
  852. $(call if_changed,copy)
  853. endif
  854. %.imx: %.bin
  855. $(Q)$(MAKE) $(build)=arch/arm/mach-imx $@
  856. %.vyb: %.imx
  857. $(Q)$(MAKE) $(build)=arch/arm/cpu/armv7/vf610 $@
  858. quiet_cmd_copy = COPY $@
  859. cmd_copy = cp $< $@
  860. u-boot.dtb: dts/dt.dtb
  861. $(call cmd,copy)
  862. OBJCOPYFLAGS_u-boot.hex := -O ihex
  863. OBJCOPYFLAGS_u-boot.srec := -O srec
  864. u-boot.hex u-boot.srec: u-boot FORCE
  865. $(call if_changed,objcopy)
  866. OBJCOPYFLAGS_u-boot-elf.srec := $(OBJCOPYFLAGS_u-boot.srec)
  867. u-boot-elf.srec: u-boot.elf FORCE
  868. $(call if_changed,objcopy)
  869. OBJCOPYFLAGS_u-boot-spl.srec = $(OBJCOPYFLAGS_u-boot.srec)
  870. spl/u-boot-spl.srec: spl/u-boot-spl FORCE
  871. $(call if_changed,objcopy)
  872. OBJCOPYFLAGS_u-boot-nodtb.bin := -O binary \
  873. $(if $(CONFIG_X86_16BIT_INIT),-R .start16 -R .resetvec) \
  874. $(if $(CONFIG_MPC85XX_HAVE_RESET_VECTOR),-R .bootpg -R .resetvec)
  875. OBJCOPYFLAGS_u-boot-spl.hex = $(OBJCOPYFLAGS_u-boot.hex)
  876. spl/u-boot-spl.hex: spl/u-boot-spl FORCE
  877. $(call if_changed,objcopy)
  878. binary_size_check: u-boot-nodtb.bin FORCE
  879. @file_size=$(shell wc -c u-boot-nodtb.bin | awk '{print $$1}') ; \
  880. map_size=$(shell cat u-boot.map | \
  881. awk '/_image_copy_start/ {start = $$1} /_image_binary_end/ {end = $$1} END {if (start != "" && end != "") print "ibase=16; " toupper(end) " - " toupper(start)}' \
  882. | sed 's/0X//g' \
  883. | bc); \
  884. if [ "" != "$$map_size" ]; then \
  885. if test $$map_size -ne $$file_size; then \
  886. echo "u-boot.map shows a binary size of $$map_size" >&2 ; \
  887. echo " but u-boot-nodtb.bin shows $$file_size" >&2 ; \
  888. exit 1; \
  889. fi \
  890. fi
  891. ifneq ($(CONFIG_SYS_INIT_SP_BSS_OFFSET),)
  892. ifneq ($(CONFIG_SYS_MALLOC_F_LEN),)
  893. subtract_sys_malloc_f_len = space=$$(($${space} - $(CONFIG_SYS_MALLOC_F_LEN)))
  894. else
  895. subtract_sys_malloc_f_len = true
  896. endif
  897. # The 1/4 margin below is somewhat arbitrary. The likely initial SP usage is
  898. # so low that the DTB could probably use 90%+ of the available space, for
  899. # current values of CONFIG_SYS_INIT_SP_BSS_OFFSET at least. However, let's be
  900. # safe for now and tweak this later if space becomes tight.
  901. # A rejected alternative would be to check that some absolute minimum stack
  902. # space was available. However, since CONFIG_SYS_INIT_SP_BSS_OFFSET is
  903. # deliberately build-specific, to take account of build-to-build stack usage
  904. # differences due to different feature sets, there is no common absolute value
  905. # to check against.
  906. init_sp_bss_offset_check: u-boot.dtb FORCE
  907. @dtb_size=$(shell wc -c u-boot.dtb | awk '{print $$1}') ; \
  908. space=$(CONFIG_SYS_INIT_SP_BSS_OFFSET) ; \
  909. $(subtract_sys_malloc_f_len) ; \
  910. quarter_space=$$(($${space} / 4)) ; \
  911. if [ $${dtb_size} -gt $${quarter_space} ]; then \
  912. echo "u-boot.dtb is larger than 1 quarter of " >&2 ; \
  913. echo "(CONFIG_SYS_INIT_SP_BSS_OFFSET - CONFIG_SYS_MALLOC_F_LEN)" >&2 ; \
  914. exit 1 ; \
  915. fi
  916. endif
  917. u-boot-nodtb.bin: u-boot FORCE
  918. $(call if_changed,objcopy)
  919. $(call DO_STATIC_RELA,$<,$@,$(CONFIG_SYS_TEXT_BASE))
  920. $(BOARD_SIZE_CHECK)
  921. u-boot.ldr: u-boot
  922. $(CREATE_LDR_ENV)
  923. $(LDR) -T $(CONFIG_CPU) -c $@ $< $(LDR_FLAGS)
  924. $(BOARD_SIZE_CHECK)
  925. # binman
  926. # ---------------------------------------------------------------------------
  927. # Use 'make BINMAN_DEBUG=1' to enable debugging
  928. quiet_cmd_binman = BINMAN $@
  929. cmd_binman = $(srctree)/tools/binman/binman -u -d u-boot.dtb -O . -m \
  930. -I . -I $(srctree) -I $(srctree)/board/$(BOARDDIR) \
  931. $(if $(BINMAN_DEBUG),-D) $(BINMAN_$(@F)) $<
  932. OBJCOPYFLAGS_u-boot.ldr.hex := -I binary -O ihex
  933. OBJCOPYFLAGS_u-boot.ldr.srec := -I binary -O srec
  934. u-boot.ldr.hex u-boot.ldr.srec: u-boot.ldr FORCE
  935. $(call if_changed,objcopy)
  936. #
  937. # U-Boot entry point, needed for booting of full-blown U-Boot
  938. # from the SPL U-Boot version.
  939. #
  940. ifndef CONFIG_SYS_UBOOT_START
  941. CONFIG_SYS_UBOOT_START := 0
  942. endif
  943. # Boards with more complex image requirments can provide an .its source file
  944. # or a generator script
  945. ifneq ($(CONFIG_SPL_FIT_SOURCE),"")
  946. U_BOOT_ITS = $(subst ",,$(CONFIG_SPL_FIT_SOURCE))
  947. else
  948. ifneq ($(CONFIG_SPL_FIT_GENERATOR),"")
  949. U_BOOT_ITS := u-boot.its
  950. ifeq ($(CONFIG_SPL_FIT_GENERATOR),"arch/arm/mach-rockchip/make_fit_atf.py")
  951. U_BOOT_ITS_DEPS += u-boot
  952. endif
  953. $(U_BOOT_ITS): $(U_BOOT_ITS_DEPS) FORCE
  954. $(srctree)/$(CONFIG_SPL_FIT_GENERATOR) \
  955. $(patsubst %,arch/$(ARCH)/dts/%.dtb,$(subst ",,$(CONFIG_OF_LIST))) > $@
  956. endif
  957. endif
  958. ifdef CONFIG_SPL_LOAD_FIT
  959. MKIMAGEFLAGS_u-boot.img = -f auto -A $(ARCH) -T firmware -C none -O u-boot \
  960. -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \
  961. -n "U-Boot $(UBOOTRELEASE) for $(BOARD) board" -E \
  962. $(patsubst %,-b arch/$(ARCH)/dts/%.dtb,$(subst ",,$(CONFIG_OF_LIST)))
  963. else
  964. MKIMAGEFLAGS_u-boot.img = -A $(ARCH) -T firmware -C none -O u-boot \
  965. -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \
  966. -n "U-Boot $(UBOOTRELEASE) for $(BOARD) board"
  967. MKIMAGEFLAGS_u-boot-ivt.img = -A $(ARCH) -T firmware_ivt -C none -O u-boot \
  968. -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \
  969. -n "U-Boot $(UBOOTRELEASE) for $(BOARD) board"
  970. u-boot-ivt.img: MKIMAGEOUTPUT = u-boot-ivt.img.log
  971. CLEAN_FILES += u-boot-ivt.img.log u-boot-dtb.imx.log SPL.log u-boot.imx.log
  972. endif
  973. MKIMAGEFLAGS_u-boot-dtb.img = $(MKIMAGEFLAGS_u-boot.img)
  974. MKIMAGEFLAGS_u-boot.kwb = -n $(srctree)/$(CONFIG_SYS_KWD_CONFIG:"%"=%) \
  975. -T kwbimage -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE)
  976. MKIMAGEFLAGS_u-boot-spl.kwb = -n $(srctree)/$(CONFIG_SYS_KWD_CONFIG:"%"=%) \
  977. -T kwbimage -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) \
  978. $(if $(KEYDIR),-k $(KEYDIR))
  979. MKIMAGEFLAGS_u-boot.pbl = -n $(srctree)/$(CONFIG_SYS_FSL_PBL_RCW:"%"=%) \
  980. -R $(srctree)/$(CONFIG_SYS_FSL_PBL_PBI:"%"=%) -T pblimage
  981. u-boot-dtb.img u-boot.img u-boot.kwb u-boot.pbl u-boot-ivt.img: \
  982. $(if $(CONFIG_SPL_LOAD_FIT),u-boot-nodtb.bin dts/dt.dtb,u-boot.bin) FORCE
  983. $(call if_changed,mkimage)
  984. u-boot.itb: u-boot-nodtb.bin dts/dt.dtb $(U_BOOT_ITS) FORCE
  985. $(call if_changed,mkfitimage)
  986. $(BOARD_SIZE_CHECK)
  987. u-boot-spl.kwb: u-boot.img spl/u-boot-spl.bin FORCE
  988. $(call if_changed,mkimage)
  989. u-boot.sha1: u-boot.bin
  990. tools/ubsha1 u-boot.bin
  991. u-boot.dis: u-boot
  992. $(OBJDUMP) -d $< > $@
  993. ifneq ($(CONFIG_SPL_PAYLOAD),)
  994. SPL_PAYLOAD := $(CONFIG_SPL_PAYLOAD:"%"=%)
  995. else
  996. SPL_PAYLOAD := u-boot.bin
  997. endif
  998. OBJCOPYFLAGS_u-boot-with-spl.bin = -I binary -O binary \
  999. --pad-to=$(CONFIG_SPL_PAD_TO)
  1000. u-boot-with-spl.bin: spl/u-boot-spl.bin $(SPL_PAYLOAD) FORCE
  1001. $(call if_changed,pad_cat)
  1002. ifeq ($(CONFIG_ARCH_LPC32XX)$(CONFIG_SPL),yy)
  1003. MKIMAGEFLAGS_lpc32xx-spl.img = -T lpc32xximage -a $(CONFIG_SPL_TEXT_BASE)
  1004. lpc32xx-spl.img: spl/u-boot-spl.bin FORCE
  1005. $(call if_changed,mkimage)
  1006. OBJCOPYFLAGS_lpc32xx-boot-0.bin = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO)
  1007. lpc32xx-boot-0.bin: lpc32xx-spl.img FORCE
  1008. $(call if_changed,objcopy)
  1009. OBJCOPYFLAGS_lpc32xx-boot-1.bin = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO)
  1010. lpc32xx-boot-1.bin: lpc32xx-spl.img FORCE
  1011. $(call if_changed,objcopy)
  1012. lpc32xx-full.bin: lpc32xx-boot-0.bin lpc32xx-boot-1.bin u-boot.img FORCE
  1013. $(call if_changed,cat)
  1014. CLEAN_FILES += lpc32xx-*
  1015. endif
  1016. OBJCOPYFLAGS_u-boot-with-tpl.bin = -I binary -O binary \
  1017. --pad-to=$(CONFIG_TPL_PAD_TO)
  1018. tpl/u-boot-with-tpl.bin: tpl/u-boot-tpl.bin u-boot.bin FORCE
  1019. $(call if_changed,pad_cat)
  1020. SPL: spl/u-boot-spl.bin FORCE
  1021. $(Q)$(MAKE) $(build)=arch/arm/mach-imx $@
  1022. ifeq ($(CONFIG_ARCH_IMX8M), y)
  1023. flash.bin: spl/u-boot-spl.bin u-boot.itb FORCE
  1024. $(Q)$(MAKE) $(build)=arch/arm/mach-imx $@
  1025. endif
  1026. u-boot-with-spl.imx u-boot-with-nand-spl.imx: SPL u-boot.bin FORCE
  1027. $(Q)$(MAKE) $(build)=arch/arm/mach-imx $@
  1028. MKIMAGEFLAGS_u-boot.ubl = -n $(UBL_CONFIG) -T ublimage -e $(CONFIG_SYS_TEXT_BASE)
  1029. u-boot.ubl: u-boot-with-spl.bin FORCE
  1030. $(call if_changed,mkimage)
  1031. MKIMAGEFLAGS_u-boot-spl.ais = -s -n $(if $(CONFIG_AIS_CONFIG_FILE), \
  1032. $(srctree)/$(CONFIG_AIS_CONFIG_FILE:"%"=%),"/dev/null") \
  1033. -T aisimage -e $(CONFIG_SPL_TEXT_BASE)
  1034. spl/u-boot-spl.ais: spl/u-boot-spl.bin FORCE
  1035. $(call if_changed,mkimage)
  1036. OBJCOPYFLAGS_u-boot.ais = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO)
  1037. u-boot.ais: spl/u-boot-spl.ais u-boot.img FORCE
  1038. $(call if_changed,pad_cat)
  1039. u-boot-signed.sb: u-boot.bin spl/u-boot-spl.bin
  1040. $(Q)$(MAKE) $(build)=arch/arm/cpu/arm926ejs/mxs u-boot-signed.sb
  1041. u-boot.sb: u-boot.bin spl/u-boot-spl.bin
  1042. $(Q)$(MAKE) $(build)=arch/arm/cpu/arm926ejs/mxs u-boot.sb
  1043. # On x600 (SPEAr600) U-Boot is appended to U-Boot SPL.
  1044. # Both images are created using mkimage (crc etc), so that the ROM
  1045. # bootloader can check its integrity. Padding needs to be done to the
  1046. # SPL image (with mkimage header) and not the binary. Otherwise the resulting image
  1047. # which is loaded/copied by the ROM bootloader to SRAM doesn't fit.
  1048. # The resulting image containing both U-Boot images is called u-boot.spr
  1049. MKIMAGEFLAGS_u-boot-spl.img = -A $(ARCH) -T firmware -C none \
  1050. -a $(CONFIG_SPL_TEXT_BASE) -e $(CONFIG_SPL_TEXT_BASE) -n XLOADER
  1051. spl/u-boot-spl.img: spl/u-boot-spl.bin FORCE
  1052. $(call if_changed,mkimage)
  1053. OBJCOPYFLAGS_u-boot.spr = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO) \
  1054. --gap-fill=0xff
  1055. u-boot.spr: spl/u-boot-spl.img u-boot.img FORCE
  1056. $(call if_changed,pad_cat)
  1057. ifneq ($(CONFIG_ARCH_SOCFPGA),)
  1058. quiet_cmd_socboot = SOCBOOT $@
  1059. cmd_socboot = cat spl/u-boot-spl.sfp spl/u-boot-spl.sfp \
  1060. spl/u-boot-spl.sfp spl/u-boot-spl.sfp \
  1061. u-boot.img > $@ || rm -f $@
  1062. u-boot-with-spl.sfp: spl/u-boot-spl.sfp u-boot.img FORCE
  1063. $(call if_changed,socboot)
  1064. endif
  1065. ifeq ($(CONFIG_MPC85xx)$(CONFIG_OF_SEPARATE),yy)
  1066. u-boot-with-dtb.bin: u-boot.bin u-boot.dtb \
  1067. $(if $(CONFIG_MPC85XX_HAVE_RESET_VECTOR), u-boot-br.bin) FORCE
  1068. $(call if_changed,binman)
  1069. ifeq ($(CONFIG_MPC85XX_HAVE_RESET_VECTOR),y)
  1070. OBJCOPYFLAGS_u-boot-br.bin := -O binary -j .bootpg -j .resetvec
  1071. u-boot-br.bin: u-boot FORCE
  1072. $(call if_changed,objcopy)
  1073. endif
  1074. endif
  1075. # x86 uses a large ROM. We fill it with 0xff, put the 16-bit stuff (including
  1076. # reset vector) at the top, Intel ME descriptor at the bottom, and U-Boot in
  1077. # the middle. This is handled by binman based on an image description in the
  1078. # board's device tree.
  1079. ifneq ($(CONFIG_X86_RESET_VECTOR),)
  1080. rom: u-boot.rom FORCE
  1081. refcode.bin: $(srctree)/board/$(BOARDDIR)/refcode.bin FORCE
  1082. $(call if_changed,copy)
  1083. quiet_cmd_ldr = LD $@
  1084. cmd_ldr = $(LD) $(LDFLAGS_$(@F)) \
  1085. $(filter-out FORCE,$^) -o $@
  1086. u-boot.rom: u-boot-x86-16bit.bin u-boot.bin \
  1087. $(if $(CONFIG_SPL_X86_16BIT_INIT),spl/u-boot-spl.bin) \
  1088. $(if $(CONFIG_HAVE_REFCODE),refcode.bin) FORCE
  1089. $(call if_changed,binman)
  1090. OBJCOPYFLAGS_u-boot-x86-16bit.bin := -O binary -j .start16 -j .resetvec
  1091. u-boot-x86-16bit.bin: u-boot FORCE
  1092. $(call if_changed,objcopy)
  1093. endif
  1094. ifneq ($(CONFIG_ARCH_SUNXI),)
  1095. ifeq ($(CONFIG_ARM64),)
  1096. u-boot-sunxi-with-spl.bin: spl/sunxi-spl.bin u-boot.img u-boot.dtb FORCE
  1097. $(call if_changed,binman)
  1098. else
  1099. u-boot-sunxi-with-spl.bin: spl/sunxi-spl.bin u-boot.itb FORCE
  1100. $(call if_changed,cat)
  1101. endif
  1102. endif
  1103. ifneq ($(CONFIG_TEGRA),)
  1104. ifneq ($(CONFIG_BINMAN),)
  1105. # Makes u-boot-dtb-tegra.bin u-boot-tegra.bin u-boot-nodtb-tegra.bin
  1106. %-dtb-tegra.bin %-tegra.bin %-nodtb-tegra.bin: \
  1107. spl/%-spl %.bin FORCE
  1108. $(call if_changed,binman)
  1109. else
  1110. OBJCOPYFLAGS_u-boot-nodtb-tegra.bin = -O binary --pad-to=$(CONFIG_SYS_TEXT_BASE)
  1111. u-boot-nodtb-tegra.bin: spl/u-boot-spl u-boot-nodtb.bin FORCE
  1112. $(call if_changed,pad_cat)
  1113. OBJCOPYFLAGS_u-boot-tegra.bin = -O binary --pad-to=$(CONFIG_SYS_TEXT_BASE)
  1114. u-boot-tegra.bin: spl/u-boot-spl u-boot.bin FORCE
  1115. $(call if_changed,pad_cat)
  1116. u-boot-dtb-tegra.bin: u-boot-tegra.bin FORCE
  1117. $(call if_changed,copy)
  1118. endif # binman
  1119. endif
  1120. OBJCOPYFLAGS_u-boot-app.efi := $(OBJCOPYFLAGS_EFI)
  1121. u-boot-app.efi: u-boot FORCE
  1122. $(call if_changed,zobjcopy)
  1123. u-boot.bin.o: u-boot.bin FORCE
  1124. $(call if_changed,efipayload)
  1125. u-boot-payload.lds: $(LDSCRIPT_EFI) FORCE
  1126. $(call if_changed_dep,cpp_lds)
  1127. # Rule to link the EFI payload which contains a stub and a U-Boot binary
  1128. quiet_cmd_u-boot_payload ?= LD $@
  1129. cmd_u-boot_payload ?= $(LD) $(LDFLAGS_EFI_PAYLOAD) -o $@ \
  1130. -T u-boot-payload.lds arch/x86/cpu/call32.o \
  1131. lib/efi/efi.o lib/efi/efi_stub.o u-boot.bin.o \
  1132. $(addprefix arch/$(ARCH)/lib/,$(EFISTUB))
  1133. u-boot-payload: u-boot.bin.o u-boot-payload.lds FORCE
  1134. $(call if_changed,u-boot_payload)
  1135. OBJCOPYFLAGS_u-boot-payload.efi := $(OBJCOPYFLAGS_EFI)
  1136. u-boot-payload.efi: u-boot-payload FORCE
  1137. $(call if_changed,zobjcopy)
  1138. u-boot-img.bin: spl/u-boot-spl.bin u-boot.img FORCE
  1139. $(call if_changed,cat)
  1140. #Add a target to create boot binary having SPL binary in PBI format
  1141. #concatenated with u-boot binary. It is need by PowerPC SoC having
  1142. #internal SRAM <= 512KB.
  1143. MKIMAGEFLAGS_u-boot-spl.pbl = -n $(srctree)/$(CONFIG_SYS_FSL_PBL_RCW:"%"=%) \
  1144. -R $(srctree)/$(CONFIG_SYS_FSL_PBL_PBI:"%"=%) -T pblimage \
  1145. -A $(ARCH) -a $(CONFIG_SPL_TEXT_BASE)
  1146. spl/u-boot-spl.pbl: spl/u-boot-spl.bin FORCE
  1147. $(call if_changed,mkimage)
  1148. ifeq ($(ARCH),arm)
  1149. UBOOT_BINLOAD := u-boot.img
  1150. else
  1151. ifeq ($(CONFIG_MPC85xx)$(CONFIG_OF_SEPARATE),yy)
  1152. UBOOT_BINLOAD := u-boot-with-dtb.bin
  1153. else
  1154. UBOOT_BINLOAD := u-boot.bin
  1155. endif
  1156. endif
  1157. OBJCOPYFLAGS_u-boot-with-spl-pbl.bin = -I binary -O binary --pad-to=$(CONFIG_SPL_PAD_TO) \
  1158. --gap-fill=0xff
  1159. u-boot-with-spl-pbl.bin: spl/u-boot-spl.pbl $(UBOOT_BINLOAD) FORCE
  1160. $(call if_changed,pad_cat)
  1161. # PPC4xx needs the SPL at the end of the image, since the reset vector
  1162. # is located at 0xfffffffc. So we can't use the "u-boot-img.bin" target
  1163. # and need to introduce a new build target with the full blown U-Boot
  1164. # at the start padded up to the start of the SPL image. And then concat
  1165. # the SPL image to the end.
  1166. OBJCOPYFLAGS_u-boot-img-spl-at-end.bin := -I binary -O binary \
  1167. --pad-to=$(CONFIG_UBOOT_PAD_TO) --gap-fill=0xff
  1168. u-boot-img-spl-at-end.bin: u-boot.img spl/u-boot-spl.bin FORCE
  1169. $(call if_changed,pad_cat)
  1170. # Create a new ELF from a raw binary file.
  1171. ifndef PLATFORM_ELFENTRY
  1172. PLATFORM_ELFENTRY = "_start"
  1173. endif
  1174. quiet_cmd_u-boot-elf ?= LD $@
  1175. cmd_u-boot-elf ?= $(LD) u-boot-elf.o -o $@ \
  1176. --defsym=$(PLATFORM_ELFENTRY)=$(CONFIG_SYS_TEXT_BASE) \
  1177. -Ttext=$(CONFIG_SYS_TEXT_BASE)
  1178. u-boot.elf: u-boot.bin
  1179. $(Q)$(OBJCOPY) -I binary $(PLATFORM_ELFFLAGS) $< u-boot-elf.o
  1180. $(call if_changed,u-boot-elf)
  1181. # MediaTek's ARM-based u-boot needs a header to contains its load address
  1182. # which is parsed by the BootROM.
  1183. # If the SPL build is enabled, the header will be added to the spl binary,
  1184. # and the spl binary and the u-boot.img will be combined into one file.
  1185. # Otherwise the header will be added to the u-boot.bin directly.
  1186. ifeq ($(CONFIG_SPL),y)
  1187. spl/u-boot-spl-mtk.bin: spl/u-boot-spl
  1188. u-boot-mtk.bin: u-boot.dtb u-boot.img spl/u-boot-spl-mtk.bin FORCE
  1189. $(call if_changed,binman)
  1190. else
  1191. MKIMAGEFLAGS_u-boot-mtk.bin = -T mtk_image \
  1192. -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) \
  1193. -n "$(patsubst "%",%,$(CONFIG_MTK_BROM_HEADER_INFO))"
  1194. u-boot-mtk.bin: u-boot.bin FORCE
  1195. $(call if_changed,mkimage)
  1196. endif
  1197. ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(ARCH)/Makefile.postlink)
  1198. # Rule to link u-boot
  1199. # May be overridden by arch/$(ARCH)/config.mk
  1200. quiet_cmd_u-boot__ ?= LD $@
  1201. cmd_u-boot__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_u-boot) -o $@ \
  1202. -T u-boot.lds $(u-boot-init) \
  1203. --start-group $(u-boot-main) --end-group \
  1204. $(PLATFORM_LIBS) -Map u-boot.map; \
  1205. $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
  1206. quiet_cmd_smap = GEN common/system_map.o
  1207. cmd_smap = \
  1208. smap=`$(call SYSTEM_MAP,u-boot) | \
  1209. awk '$$2 ~ /[tTwW]/ {printf $$1 $$3 "\\\\000"}'` ; \
  1210. $(CC) $(c_flags) -DSYSTEM_MAP="\"$${smap}\"" \
  1211. -c $(srctree)/common/system_map.c -o common/system_map.o
  1212. u-boot: $(u-boot-init) $(u-boot-main) u-boot.lds FORCE
  1213. +$(call if_changed,u-boot__)
  1214. ifeq ($(CONFIG_KALLSYMS),y)
  1215. $(call cmd,smap)
  1216. $(call cmd,u-boot__) common/system_map.o
  1217. endif
  1218. ifeq ($(CONFIG_RISCV),y)
  1219. @tools/prelink-riscv $@ 0
  1220. endif
  1221. quiet_cmd_sym ?= SYM $@
  1222. cmd_sym ?= $(OBJDUMP) -t $< > $@
  1223. u-boot.sym: u-boot FORCE
  1224. $(call if_changed,sym)
  1225. # The actual objects are generated when descending,
  1226. # make sure no implicit rule kicks in
  1227. $(sort $(u-boot-init) $(u-boot-main)): $(u-boot-dirs) ;
  1228. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  1229. # Preset locale variables to speed up the build process. Limit locale
  1230. # tweaks to this spot to avoid wrong language settings when running
  1231. # make menuconfig etc.
  1232. # Error messages still appears in the original language
  1233. PHONY += $(u-boot-dirs)
  1234. $(u-boot-dirs): prepare scripts
  1235. $(Q)$(MAKE) $(build)=$@
  1236. tools: prepare
  1237. # The "tools" are needed early
  1238. $(filter-out tools, $(u-boot-dirs)): tools
  1239. # The "examples" conditionally depend on U-Boot (say, when USE_PRIVATE_LIBGCC
  1240. # is "yes"), so compile examples after U-Boot is compiled.
  1241. examples: $(filter-out examples, $(u-boot-dirs))
  1242. define filechk_uboot.release
  1243. echo "$(UBOOTVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
  1244. endef
  1245. # Store (new) UBOOTRELEASE string in include/config/uboot.release
  1246. include/config/uboot.release: include/config/auto.conf FORCE
  1247. $(call filechk,uboot.release)
  1248. # Things we need to do before we recursively start building the kernel
  1249. # or the modules are listed in "prepare".
  1250. # A multi level approach is used. prepareN is processed before prepareN-1.
  1251. # archprepare is used in arch Makefiles and when processed asm symlink,
  1252. # version.h and scripts_basic is processed / created.
  1253. # Listed in dependency order
  1254. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  1255. # prepare3 is used to check if we are building in a separate output directory,
  1256. # and if so do:
  1257. # 1) Check that make has not been executed in the kernel src $(srctree)
  1258. prepare3: include/config/uboot.release
  1259. ifneq ($(KBUILD_SRC),)
  1260. @$(kecho) ' Using $(srctree) as source for U-Boot'
  1261. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  1262. echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
  1263. echo >&2 " in the '$(srctree)' directory.";\
  1264. /bin/false; \
  1265. fi;
  1266. endif
  1267. # prepare2 creates a makefile if using a separate output directory
  1268. prepare2: prepare3 outputmakefile
  1269. prepare1: prepare2 $(version_h) $(timestamp_h) \
  1270. include/config/auto.conf
  1271. ifeq ($(wildcard $(LDSCRIPT)),)
  1272. @echo >&2 " Could not find linker script."
  1273. @/bin/false
  1274. endif
  1275. ifeq ($(CONFIG_USE_DEFAULT_ENV_FILE),y)
  1276. prepare1: $(defaultenv_h)
  1277. endif
  1278. archprepare: prepare1 scripts_basic
  1279. prepare0: archprepare FORCE
  1280. $(Q)$(MAKE) $(build)=.
  1281. # All the preparing..
  1282. prepare: prepare0
  1283. # Generate some files
  1284. # ---------------------------------------------------------------------------
  1285. define filechk_version.h
  1286. (echo \#define PLAIN_VERSION \"$(UBOOTRELEASE)\"; \
  1287. echo \#define U_BOOT_VERSION \"U-Boot \" PLAIN_VERSION; \
  1288. echo \#define CC_VERSION_STRING \"$$(LC_ALL=C $(CC) --version | head -n 1)\"; \
  1289. echo \#define LD_VERSION_STRING \"$$(LC_ALL=C $(LD) --version | head -n 1)\"; )
  1290. endef
  1291. # The SOURCE_DATE_EPOCH mechanism requires a date that behaves like GNU date.
  1292. # The BSD date on the other hand behaves different and would produce errors
  1293. # with the misused '-d' switch. Respect that and search a working date with
  1294. # well known pre- and suffixes for the GNU variant of date.
  1295. define filechk_timestamp.h
  1296. (if test -n "$${SOURCE_DATE_EPOCH}"; then \
  1297. SOURCE_DATE="@$${SOURCE_DATE_EPOCH}"; \
  1298. DATE=""; \
  1299. for date in gdate date.gnu date; do \
  1300. $${date} -u -d "$${SOURCE_DATE}" >/dev/null 2>&1 && DATE="$${date}"; \
  1301. done; \
  1302. if test -n "$${DATE}"; then \
  1303. LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_DATE "%b %d %C%y"'; \
  1304. LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_TIME "%T"'; \
  1305. LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_TZ "%z"'; \
  1306. LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_DMI_DATE "%m/%d/%Y"'; \
  1307. LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_BUILD_DATE 0x%Y%m%d'; \
  1308. else \
  1309. return 42; \
  1310. fi; \
  1311. else \
  1312. LC_ALL=C date +'#define U_BOOT_DATE "%b %d %C%y"'; \
  1313. LC_ALL=C date +'#define U_BOOT_TIME "%T"'; \
  1314. LC_ALL=C date +'#define U_BOOT_TZ "%z"'; \
  1315. LC_ALL=C date +'#define U_BOOT_DMI_DATE "%m/%d/%Y"'; \
  1316. LC_ALL=C date +'#define U_BOOT_BUILD_DATE 0x%Y%m%d'; \
  1317. fi)
  1318. endef
  1319. define filechk_defaultenv.h
  1320. (grep -v '^#' | \
  1321. grep -v '^$$' | \
  1322. tr '\n' '\0' | \
  1323. sed -e 's/\\\x0/\n/' | \
  1324. xxd -i ; echo ", 0x00" ; )
  1325. endef
  1326. $(version_h): include/config/uboot.release FORCE
  1327. $(call filechk,version.h)
  1328. $(timestamp_h): $(srctree)/Makefile FORCE
  1329. $(call filechk,timestamp.h)
  1330. $(defaultenv_h): $(CONFIG_DEFAULT_ENV_FILE:"%"=%) FORCE
  1331. $(call filechk,defaultenv.h)
  1332. # ---------------------------------------------------------------------------
  1333. quiet_cmd_cpp_lds = LDS $@
  1334. cmd_cpp_lds = $(CPP) -Wp,-MD,$(depfile) $(cpp_flags) $(LDPPFLAGS) \
  1335. -D__ASSEMBLY__ -x assembler-with-cpp -std=c99 -P -o $@ $<
  1336. u-boot.lds: $(LDSCRIPT) prepare FORCE
  1337. $(call if_changed_dep,cpp_lds)
  1338. spl/u-boot-spl.bin: spl/u-boot-spl
  1339. @:
  1340. spl/u-boot-spl: tools prepare \
  1341. $(if $(CONFIG_OF_SEPARATE)$(CONFIG_OF_EMBED)$(CONFIG_SPL_OF_PLATDATA),dts/dt.dtb) \
  1342. $(if $(CONFIG_OF_SEPARATE)$(CONFIG_OF_EMBED)$(CONFIG_TPL_OF_PLATDATA),dts/dt.dtb)
  1343. $(Q)$(MAKE) obj=spl -f $(srctree)/scripts/Makefile.spl all
  1344. spl/sunxi-spl.bin: spl/u-boot-spl
  1345. @:
  1346. spl/sunxi-spl-with-ecc.bin: spl/sunxi-spl.bin
  1347. @:
  1348. spl/u-boot-spl.sfp: spl/u-boot-spl
  1349. @:
  1350. spl/boot.bin: spl/u-boot-spl
  1351. @:
  1352. tpl/u-boot-tpl.bin: tools prepare \
  1353. $(if $(CONFIG_OF_SEPARATE)$(CONFIG_OF_EMBED)$(CONFIG_SPL_OF_PLATDATA),dts/dt.dtb)
  1354. $(Q)$(MAKE) obj=tpl -f $(srctree)/scripts/Makefile.spl all
  1355. TAG_SUBDIRS := $(patsubst %,$(srctree)/%,$(u-boot-dirs) include)
  1356. FIND := find
  1357. FINDFLAGS := -L
  1358. tags ctags:
  1359. ctags -w -o ctags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) \
  1360. -name '*.[chS]' -print`
  1361. ln -s ctags tags
  1362. etags:
  1363. etags -a -o etags `$(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) \
  1364. -name '*.[chS]' -print`
  1365. cscope:
  1366. $(FIND) $(FINDFLAGS) $(TAG_SUBDIRS) -name '*.[chS]' -print > \
  1367. cscope.files
  1368. cscope -b -q -k
  1369. SYSTEM_MAP = \
  1370. $(NM) $1 | \
  1371. grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | \
  1372. LC_ALL=C sort
  1373. System.map: u-boot
  1374. @$(call SYSTEM_MAP,$<) > $@
  1375. #########################################################################
  1376. # ARM relocations should all be R_ARM_RELATIVE (32-bit) or
  1377. # R_AARCH64_RELATIVE (64-bit).
  1378. checkarmreloc: u-boot
  1379. @RELOC="`$(CROSS_COMPILE)readelf -r -W $< | cut -d ' ' -f 4 | \
  1380. grep R_A | sort -u`"; \
  1381. if test "$$RELOC" != "R_ARM_RELATIVE" -a \
  1382. "$$RELOC" != "R_AARCH64_RELATIVE"; then \
  1383. echo "$< contains unexpected relocations: $$RELOC"; \
  1384. false; \
  1385. fi
  1386. envtools: scripts_basic $(version_h) $(timestamp_h)
  1387. $(Q)$(MAKE) $(build)=tools/env
  1388. tools-only: scripts_basic $(version_h) $(timestamp_h)
  1389. $(Q)$(MAKE) $(build)=tools
  1390. tools-all: export HOST_TOOLS_ALL=y
  1391. tools-all: envtools tools ;
  1392. cross_tools: export CROSS_BUILD_TOOLS=y
  1393. cross_tools: tools ;
  1394. .PHONY : CHANGELOG
  1395. CHANGELOG:
  1396. git log --no-merges U-Boot-1_1_5.. | \
  1397. unexpand -a | sed -e 's/\s\s*$$//' > $@
  1398. #########################################################################
  1399. ###
  1400. # Cleaning is done on three levels.
  1401. # make clean Delete most generated files
  1402. # Leave enough to build external modules
  1403. # make mrproper Delete the current configuration, and all generated files
  1404. # make distclean Remove editor backup files, patch leftover files and the like
  1405. # Directories & files removed with 'make clean'
  1406. CLEAN_DIRS += $(MODVERDIR) \
  1407. $(foreach d, spl tpl, $(patsubst %,$d/%, \
  1408. $(filter-out include, $(shell ls -1 $d 2>/dev/null))))
  1409. CLEAN_FILES += include/bmp_logo.h include/bmp_logo_data.h \
  1410. boot* u-boot* MLO* SPL System.map fit-dtb.blob
  1411. # Directories & files removed with 'make mrproper'
  1412. MRPROPER_DIRS += include/config include/generated spl tpl \
  1413. .tmp_objdiff
  1414. MRPROPER_FILES += .config .config.old include/autoconf.mk* include/config.h \
  1415. ctags etags tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
  1416. # clean - Delete most, but leave enough to build external modules
  1417. #
  1418. clean: rm-dirs := $(CLEAN_DIRS)
  1419. clean: rm-files := $(CLEAN_FILES)
  1420. clean-dirs := $(foreach f,$(u-boot-alldirs),$(if $(wildcard $(srctree)/$f/Makefile),$f))
  1421. clean-dirs := $(addprefix _clean_, $(clean-dirs))
  1422. PHONY += $(clean-dirs) clean archclean
  1423. $(clean-dirs):
  1424. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1425. clean: $(clean-dirs)
  1426. $(call cmd,rmdirs)
  1427. $(call cmd,rmfiles)
  1428. @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
  1429. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1430. -o -name '*.ko.*' -o -name '*.su' \
  1431. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  1432. -o -name '*.lex.c' -o -name '*.tab.[ch]' \
  1433. -o -name '*.symtypes' -o -name 'modules.order' \
  1434. -o -name modules.builtin -o -name '.tmp_*.o.*' \
  1435. -o -name 'dsdt.aml' -o -name 'dsdt.asl.tmp' -o -name 'dsdt.c' \
  1436. -o -name '*.efi' -o -name '*.gcno' -o -name '*.so' \) \
  1437. -type f -print | xargs rm -f
  1438. # mrproper - Delete all generated files, including .config
  1439. #
  1440. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  1441. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  1442. mrproper-dirs := $(addprefix _mrproper_,scripts)
  1443. PHONY += $(mrproper-dirs) mrproper archmrproper
  1444. $(mrproper-dirs):
  1445. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  1446. mrproper: clean $(mrproper-dirs)
  1447. $(call cmd,rmdirs)
  1448. $(call cmd,rmfiles)
  1449. @rm -f arch/*/include/asm/arch
  1450. # distclean
  1451. #
  1452. PHONY += distclean
  1453. distclean: mrproper
  1454. @find $(srctree) $(RCS_FIND_IGNORE) \
  1455. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  1456. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  1457. -o -name '.*.rej' -o -name '*%' -o -name 'core' \
  1458. -o -name '*.pyc' \) \
  1459. -type f -print | xargs rm -f
  1460. @rm -f boards.cfg
  1461. backup:
  1462. F=`basename $(srctree)` ; cd .. ; \
  1463. gtar --force-local -zcvf `LC_ALL=C date "+$$F-%Y-%m-%d-%T.tar.gz"` $$F
  1464. help:
  1465. @echo 'Cleaning targets:'
  1466. @echo ' clean - Remove most generated files but keep the config'
  1467. @echo ' mrproper - Remove all generated files + config + various backup files'
  1468. @echo ' distclean - mrproper + remove editor backup and patch files'
  1469. @echo ''
  1470. @echo 'Configuration targets:'
  1471. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  1472. @echo ''
  1473. @echo 'Test targets:'
  1474. @echo ''
  1475. @echo ' check - Run all automated tests that use sandbox'
  1476. @echo ' qcheck - Run quick automated tests that use sandbox'
  1477. @echo ''
  1478. @echo 'Other generic targets:'
  1479. @echo ' all - Build all necessary images depending on configuration'
  1480. @echo ' tests - Build U-Boot for sandbox and run tests'
  1481. @echo '* u-boot - Build the bare u-boot'
  1482. @echo ' dir/ - Build all files in dir and below'
  1483. @echo ' dir/file.[oisS] - Build specified target only'
  1484. @echo ' dir/file.lst - Build specified mixed source/assembly target only'
  1485. @echo ' (requires a recent binutils and recent build (System.map))'
  1486. @echo ' tags/ctags - Generate ctags file for editors'
  1487. @echo ' etags - Generate etags file for editors'
  1488. @echo ' cscope - Generate cscope index'
  1489. @echo ' ubootrelease - Output the release version string (use with make -s)'
  1490. @echo ' ubootversion - Output the version stored in Makefile (use with make -s)'
  1491. @echo " cfg - Don't build, just create the .cfg files"
  1492. @echo " envtools - Build only the target-side environment tools"
  1493. @echo ''
  1494. @echo 'Static analysers'
  1495. @echo ' checkstack - Generate a list of stack hogs'
  1496. @echo ' coccicheck - Execute static code analysis with Coccinelle'
  1497. @echo ''
  1498. @echo 'Documentation targets:'
  1499. @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
  1500. @echo ''
  1501. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1502. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  1503. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  1504. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  1505. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  1506. @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
  1507. @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
  1508. @echo ' 1: warnings which may be relevant and do not occur too often'
  1509. @echo ' 2: warnings which occur quite often but may still be relevant'
  1510. @echo ' 3: more obscure warnings, can most likely be ignored'
  1511. @echo ' Multiple levels can be combined with W=12 or W=123'
  1512. @echo ''
  1513. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  1514. @echo 'For further info see the ./README file'
  1515. tests check:
  1516. $(srctree)/test/run
  1517. qcheck:
  1518. $(srctree)/test/run quick
  1519. # Documentation targets
  1520. # ---------------------------------------------------------------------------
  1521. DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
  1522. linkcheckdocs dochelp refcheckdocs
  1523. PHONY += $(DOC_TARGETS)
  1524. $(DOC_TARGETS): scripts_basic FORCE
  1525. $(Q)$(MAKE) $(build)=Documentation $@
  1526. endif #ifeq ($(config-targets),1)
  1527. endif #ifeq ($(mixed-targets),1)
  1528. PHONY += checkstack ubootrelease ubootversion
  1529. checkstack:
  1530. $(OBJDUMP) -d u-boot $$(find . -name u-boot-spl) | \
  1531. $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
  1532. ubootrelease:
  1533. @echo "$(UBOOTVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
  1534. ubootversion:
  1535. @echo $(UBOOTVERSION)
  1536. # Single targets
  1537. # ---------------------------------------------------------------------------
  1538. # Single targets are compatible with:
  1539. # - build with mixed source and output
  1540. # - build with separate output dir 'make O=...'
  1541. # - external modules
  1542. #
  1543. # target-dir => where to store outputfile
  1544. # build-dir => directory in kernel source tree to use
  1545. ifeq ($(KBUILD_EXTMOD),)
  1546. build-dir = $(patsubst %/,%,$(dir $@))
  1547. target-dir = $(dir $@)
  1548. else
  1549. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1550. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1551. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1552. endif
  1553. %.s: %.c prepare scripts FORCE
  1554. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1555. %.i: %.c prepare scripts FORCE
  1556. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1557. %.o: %.c prepare scripts FORCE
  1558. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1559. %.lst: %.c prepare scripts FORCE
  1560. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1561. %.s: %.S prepare scripts FORCE
  1562. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1563. %.o: %.S prepare scripts FORCE
  1564. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1565. %.symtypes: %.c prepare scripts FORCE
  1566. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1567. # Modules
  1568. /: prepare scripts FORCE
  1569. $(cmd_crmodverdir)
  1570. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1571. $(build)=$(build-dir)
  1572. %/: prepare scripts FORCE
  1573. $(cmd_crmodverdir)
  1574. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1575. $(build)=$(build-dir)
  1576. %.ko: prepare scripts FORCE
  1577. $(cmd_crmodverdir)
  1578. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1579. $(build)=$(build-dir) $(@:.ko=.o)
  1580. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1581. # Consistency checks
  1582. # ---------------------------------------------------------------------------
  1583. PHONY += coccicheck
  1584. coccicheck:
  1585. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
  1586. # FIXME Should go into a make.lib or something
  1587. # ===========================================================================
  1588. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1589. cmd_rmdirs = rm -rf $(rm-dirs)
  1590. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1591. cmd_rmfiles = rm -f $(rm-files)
  1592. # read all saved command lines
  1593. targets := $(wildcard $(sort $(targets)))
  1594. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1595. ifneq ($(cmd_files),)
  1596. $(cmd_files): ; # Do not try to update included dependency files
  1597. include $(cmd_files)
  1598. endif
  1599. endif # skip-makefile
  1600. PHONY += FORCE
  1601. FORCE:
  1602. # Declare the contents of the .PHONY variable as phony. We keep that
  1603. # information in a variable so we can use it in if_changed and friends.
  1604. .PHONY: $(PHONY)