Makefile 54 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415141614171418141914201421142214231424142514261427142814291430143114321433143414351436143714381439144014411442144314441445144614471448144914501451145214531454145514561457145814591460146114621463146414651466146714681469147014711472147314741475147614771478147914801481148214831484148514861487148814891490149114921493149414951496149714981499150015011502150315041505150615071508150915101511151215131514151515161517151815191520152115221523152415251526152715281529153015311532153315341535153615371538153915401541154215431544154515461547154815491550155115521553155415551556155715581559156015611562156315641565156615671568156915701571157215731574157515761577157815791580158115821583158415851586158715881589159015911592159315941595
  1. VERSION = 2
  2. PATCHLEVEL = 6
  3. SUBLEVEL = 31
  4. EXTRAVERSION = .14.27
  5. NAME = Man-Eating Seals of Antiquity
  6. # *DOCUMENTATION*
  7. # To see a list of typical targets execute "make help"
  8. # More info can be located in ./README
  9. # Comments in this file are targeted only to the developer, do not
  10. # expect to learn how to build the kernel reading this file.
  11. # Do not:
  12. # o use make's built-in rules and variables
  13. # (this increases performance and avoids hard-to-debug behaviour);
  14. # o print "Entering directory ...";
  15. MAKEFLAGS += -rR --no-print-directory
  16. # We are using a recursive build, so we need to do a little thinking
  17. # to get the ordering right.
  18. #
  19. # Most importantly: sub-Makefiles should only ever modify files in
  20. # their own directory. If in some directory we have a dependency on
  21. # a file in another dir (which doesn't happen often, but it's often
  22. # unavoidable when linking the built-in.o targets which finally
  23. # turn into vmlinux), we will call a sub make in that other dir, and
  24. # after that we are sure that everything which is in that other dir
  25. # is now up to date.
  26. #
  27. # The only cases where we need to modify files which have global
  28. # effects are thus separated out and done before the recursive
  29. # descending is started. They are now explicitly listed as the
  30. # prepare rule.
  31. # To put more focus on warnings, be less verbose as default
  32. # Use 'make V=1' to see the full commands
  33. ifeq ("$(origin V)", "command line")
  34. KBUILD_VERBOSE = $(V)
  35. endif
  36. ifndef KBUILD_VERBOSE
  37. KBUILD_VERBOSE = 0
  38. endif
  39. # Call a source code checker (by default, "sparse") as part of the
  40. # C compilation.
  41. #
  42. # Use 'make C=1' to enable checking of only re-compiled files.
  43. # Use 'make C=2' to enable checking of *all* source files, regardless
  44. # of whether they are re-compiled or not.
  45. #
  46. # See the file "Documentation/sparse.txt" for more details, including
  47. # where to get the "sparse" utility.
  48. ifeq ("$(origin C)", "command line")
  49. KBUILD_CHECKSRC = $(C)
  50. endif
  51. ifndef KBUILD_CHECKSRC
  52. KBUILD_CHECKSRC = 0
  53. endif
  54. # Use make M=dir to specify directory of external module to build
  55. # Old syntax make ... SUBDIRS=$PWD is still supported
  56. # Setting the environment variable KBUILD_EXTMOD take precedence
  57. ifdef SUBDIRS
  58. KBUILD_EXTMOD ?= $(SUBDIRS)
  59. endif
  60. ifeq ("$(origin M)", "command line")
  61. KBUILD_EXTMOD := $(M)
  62. endif
  63. # kbuild supports saving output files in a separate directory.
  64. # To locate output files in a separate directory two syntaxes are supported.
  65. # In both cases the working directory must be the root of the kernel src.
  66. # 1) O=
  67. # Use "make O=dir/to/store/output/files/"
  68. #
  69. # 2) Set KBUILD_OUTPUT
  70. # Set the environment variable KBUILD_OUTPUT to point to the directory
  71. # where the output files shall be placed.
  72. # export KBUILD_OUTPUT=dir/to/store/output/files/
  73. # make
  74. #
  75. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  76. # variable.
  77. # KBUILD_SRC is set on invocation of make in OBJ directory
  78. # KBUILD_SRC is not intended to be used by the regular user (for now)
  79. ifeq ($(KBUILD_SRC),)
  80. # OK, Make called in directory where kernel src resides
  81. # Do we want to locate output files in a separate directory?
  82. ifeq ("$(origin O)", "command line")
  83. KBUILD_OUTPUT := $(O)
  84. endif
  85. # That's our default target when none is given on the command line
  86. PHONY := _all
  87. _all:
  88. # Cancel implicit rules on top Makefile
  89. $(CURDIR)/Makefile Makefile: ;
  90. ifneq ($(KBUILD_OUTPUT),)
  91. # Invoke a second make in the output directory, passing relevant variables
  92. # check that the output directory actually exists
  93. saved-output := $(KBUILD_OUTPUT)
  94. KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  95. $(if $(KBUILD_OUTPUT),, \
  96. $(error output directory "$(saved-output)" does not exist))
  97. PHONY += $(MAKECMDGOALS) sub-make
  98. $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
  99. $(Q)@:
  100. sub-make: FORCE
  101. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  102. KBUILD_SRC=$(CURDIR) \
  103. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
  104. $(filter-out _all sub-make,$(MAKECMDGOALS))
  105. # Leave processing to above invocation of make
  106. skip-makefile := 1
  107. endif # ifneq ($(KBUILD_OUTPUT),)
  108. endif # ifeq ($(KBUILD_SRC),)
  109. # We process the rest of the Makefile if this is the final invocation of make
  110. ifeq ($(skip-makefile),)
  111. # If building an external module we do not care about the all: rule
  112. # but instead _all depend on modules
  113. PHONY += all
  114. ifeq ($(KBUILD_EXTMOD),)
  115. _all: all
  116. else
  117. _all: modules
  118. endif
  119. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  120. objtree := $(CURDIR)
  121. src := $(srctree)
  122. obj := $(objtree)
  123. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  124. export srctree objtree VPATH
  125. # SUBARCH tells the usermode build what the underlying arch is. That is set
  126. # first, and if a usermode build is happening, the "ARCH=um" on the command
  127. # line overrides the setting of ARCH below. If a native build is happening,
  128. # then ARCH is assigned, getting whatever value it gets normally, and
  129. # SUBARCH is subsequently ignored.
  130. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  131. -e s/arm.*/arm/ -e s/sa110/arm/ \
  132. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  133. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  134. -e s/sh[234].*/sh/ )
  135. # Cross compiling and selecting different set of gcc/bin-utils
  136. # ---------------------------------------------------------------------------
  137. #
  138. # When performing cross compilation for other architectures ARCH shall be set
  139. # to the target architecture. (See arch/* for the possibilities).
  140. # ARCH can be set during invocation of make:
  141. # make ARCH=ia64
  142. # Another way is to have ARCH set in the environment.
  143. # The default ARCH is the host where make is executed.
  144. # CROSS_COMPILE specify the prefix used for all executables used
  145. # during compilation. Only gcc and related bin-utils executables
  146. # are prefixed with $(CROSS_COMPILE).
  147. # CROSS_COMPILE can be set on the command line
  148. # make CROSS_COMPILE=ia64-linux-
  149. # Alternatively CROSS_COMPILE can be set in the environment.
  150. # Default value for CROSS_COMPILE is not to prefix executables
  151. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  152. export KBUILD_BUILDHOST := $(SUBARCH)
  153. ARCH ?= $(SUBARCH)
  154. CROSS_COMPILE ?=
  155. CROSS_SUFFIX ?=
  156. # Architecture as present in compile.h
  157. UTS_MACHINE := $(ARCH)
  158. SRCARCH := $(ARCH)
  159. # Additional ARCH settings for x86
  160. ifeq ($(ARCH),i386)
  161. SRCARCH := x86
  162. endif
  163. ifeq ($(ARCH),x86_64)
  164. SRCARCH := x86
  165. endif
  166. # Additional ARCH settings for sparc
  167. ifeq ($(ARCH),sparc64)
  168. SRCARCH := sparc
  169. endif
  170. # Additional ARCH settings for sh
  171. ifeq ($(ARCH),sh64)
  172. SRCARCH := sh
  173. endif
  174. # Where to locate arch specific headers
  175. hdr-arch := $(SRCARCH)
  176. ifeq ($(ARCH),m68knommu)
  177. hdr-arch := m68k
  178. endif
  179. KCONFIG_CONFIG ?= .config
  180. # SHELL used by kbuild
  181. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  182. else if [ -x /bin/bash ]; then echo /bin/bash; \
  183. else echo sh; fi ; fi)
  184. HOSTCC = gcc
  185. HOSTCXX = g++
  186. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  187. HOSTCXXFLAGS = -O2
  188. # Decide whether to build built-in, modular, or both.
  189. # Normally, just do built-in.
  190. KBUILD_MODULES :=
  191. KBUILD_BUILTIN := 1
  192. # If we have only "make modules", don't compile built-in objects.
  193. # When we're building modules with modversions, we need to consider
  194. # the built-in objects during the descend as well, in order to
  195. # make sure the checksums are up to date before we record them.
  196. ifeq ($(MAKECMDGOALS),modules)
  197. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  198. endif
  199. # If we have "make <whatever> modules", compile modules
  200. # in addition to whatever we do anyway.
  201. # Just "make" or "make all" shall build modules as well
  202. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  203. KBUILD_MODULES := 1
  204. endif
  205. ifeq ($(MAKECMDGOALS),)
  206. KBUILD_MODULES := 1
  207. endif
  208. export KBUILD_MODULES KBUILD_BUILTIN
  209. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  210. # Beautify output
  211. # ---------------------------------------------------------------------------
  212. #
  213. # Normally, we echo the whole command before executing it. By making
  214. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  215. # $(quiet) to choose other forms of output instead, e.g.
  216. #
  217. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  218. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  219. #
  220. # If $(quiet) is empty, the whole command will be printed.
  221. # If it is set to "quiet_", only the short version will be printed.
  222. # If it is set to "silent_", nothing will be printed at all, since
  223. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  224. #
  225. # A simple variant is to prefix commands with $(Q) - that's useful
  226. # for commands that shall be hidden in non-verbose mode.
  227. #
  228. # $(Q)ln $@ :<
  229. #
  230. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  231. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  232. ifeq ($(KBUILD_VERBOSE),1)
  233. quiet =
  234. Q =
  235. else
  236. quiet=quiet_
  237. Q = @
  238. endif
  239. # If the user is running make -s (silent mode), suppress echoing of
  240. # commands
  241. ifneq ($(findstring s,$(MAKEFLAGS)),)
  242. quiet=silent_
  243. endif
  244. export quiet Q KBUILD_VERBOSE
  245. # Look for make include files relative to root of kernel src
  246. MAKEFLAGS += --include-dir=$(srctree)
  247. # We need some generic definitions (do not try to remake the file).
  248. $(srctree)/scripts/Kbuild.include: ;
  249. include $(srctree)/scripts/Kbuild.include
  250. # Make variables (CC, etc...)
  251. AS = $(CROSS_COMPILE)as
  252. LD = $(CROSS_COMPILE)ld
  253. CC = $(CROSS_COMPILE)gcc$(CROSS_SUFFIX)
  254. CPP = $(CC) -E
  255. AR = $(CROSS_COMPILE)ar
  256. NM = $(CROSS_COMPILE)nm
  257. STRIP = $(CROSS_COMPILE)strip
  258. OBJCOPY = $(CROSS_COMPILE)objcopy
  259. OBJDUMP = $(CROSS_COMPILE)objdump
  260. AWK = awk
  261. GENKSYMS = scripts/genksyms/genksyms
  262. DEPMOD = /sbin/depmod
  263. KALLSYMS = scripts/kallsyms
  264. PERL = perl
  265. CHECK = sparse
  266. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
  267. -Wbitwise -Wno-return-void $(CF)
  268. MODFLAGS = -DMODULE
  269. CFLAGS_MODULE = $(MODFLAGS)
  270. AFLAGS_MODULE = $(MODFLAGS)
  271. LDFLAGS_MODULE =
  272. CFLAGS_KERNEL =
  273. AFLAGS_KERNEL =
  274. CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
  275. # Use LINUXINCLUDE when you must reference the include/ directory.
  276. # Needed to be compatible with the O= option
  277. LINUXINCLUDE := -Iinclude \
  278. $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
  279. -I$(srctree)/arch/$(hdr-arch)/include \
  280. -include include/linux/autoconf.h
  281. KBUILD_CPPFLAGS := -D__KERNEL__
  282. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  283. -fno-strict-aliasing -fno-common \
  284. -Werror-implicit-function-declaration \
  285. -Wno-format-security \
  286. -fno-delete-null-pointer-checks
  287. KBUILD_AFLAGS := -D__ASSEMBLY__
  288. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  289. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  290. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  291. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  292. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  293. export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
  294. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS CROSS_SUFFIX
  295. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  296. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
  297. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  298. # When compiling out-of-tree modules, put MODVERDIR in the module
  299. # tree rather than in the kernel tree. The kernel tree might
  300. # even be read-only.
  301. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  302. # Files to ignore in find ... statements
  303. 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
  304. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  305. # ===========================================================================
  306. # Rules shared between *config targets and build targets
  307. # Basic helpers built in scripts/
  308. PHONY += scripts_basic
  309. scripts_basic:
  310. $(Q)$(MAKE) $(build)=scripts/basic
  311. # To avoid any implicit rule to kick in, define an empty command.
  312. scripts/basic/%: scripts_basic ;
  313. PHONY += outputmakefile
  314. # outputmakefile generates a Makefile in the output directory, if using a
  315. # separate output directory. This allows convenient use of make in the
  316. # output directory.
  317. outputmakefile:
  318. ifneq ($(KBUILD_SRC),)
  319. $(Q)ln -fsn $(srctree) source
  320. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  321. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  322. endif
  323. # To make sure we do not include .config for any of the *config targets
  324. # catch them early, and hand them over to scripts/kconfig/Makefile
  325. # It is allowed to specify more targets when calling make, including
  326. # mixing *config targets and build targets.
  327. # For example 'make oldconfig all'.
  328. # Detect when mixed targets is specified, and make a second invocation
  329. # of make so .config is not included in this case either (for *config).
  330. no-dot-config-targets := clean mrproper distclean \
  331. cscope TAGS tags help %docs check% \
  332. include/linux/version.h headers_% \
  333. kernelrelease kernelversion
  334. config-targets := 0
  335. mixed-targets := 0
  336. dot-config := 1
  337. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  338. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  339. dot-config := 0
  340. endif
  341. endif
  342. ifeq ($(KBUILD_EXTMOD),)
  343. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  344. config-targets := 1
  345. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  346. mixed-targets := 1
  347. endif
  348. endif
  349. endif
  350. ifeq ($(mixed-targets),1)
  351. # ===========================================================================
  352. # We're called with mixed targets (*config and build targets).
  353. # Handle them one by one.
  354. %:: FORCE
  355. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  356. else
  357. ifeq ($(config-targets),1)
  358. # ===========================================================================
  359. # *config targets only - make sure prerequisites are updated, and descend
  360. # in scripts/kconfig to make the *config target
  361. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  362. # KBUILD_DEFCONFIG may point out an alternative default configuration
  363. # used for 'make defconfig'
  364. include $(srctree)/arch/$(SRCARCH)/Makefile
  365. export KBUILD_DEFCONFIG KBUILD_KCONFIG
  366. config: scripts_basic outputmakefile FORCE
  367. $(Q)mkdir -p include/linux include/config
  368. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  369. %config: scripts_basic outputmakefile FORCE
  370. $(Q)mkdir -p include/linux include/config
  371. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  372. else
  373. # ===========================================================================
  374. # Build targets only - this includes vmlinux, arch specific targets, clean
  375. # targets and others. In general all targets except *config targets.
  376. ifeq ($(KBUILD_EXTMOD),)
  377. # Additional helpers built in scripts/
  378. # Carefully list dependencies so we do not try to build scripts twice
  379. # in parallel
  380. PHONY += scripts
  381. scripts: scripts_basic include/config/auto.conf
  382. $(Q)$(MAKE) $(build)=$(@)
  383. # Objects we will link into vmlinux / subdirs we need to visit
  384. init-y := init/
  385. drivers-y := drivers/ sound/ firmware/
  386. net-y := net/
  387. libs-y := lib/
  388. core-y := usr/
  389. endif # KBUILD_EXTMOD
  390. ifeq ($(dot-config),1)
  391. # Read in config
  392. -include include/config/auto.conf
  393. ifeq ($(KBUILD_EXTMOD),)
  394. # Read in dependencies to all Kconfig* files, make sure to run
  395. # oldconfig if changes are detected.
  396. -include include/config/auto.conf.cmd
  397. # To avoid any implicit rule to kick in, define an empty command
  398. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  399. # If .config is newer than include/config/auto.conf, someone tinkered
  400. # with it and forgot to run make oldconfig.
  401. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  402. # we execute the config step to be sure to catch updated Kconfig files
  403. include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  404. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  405. else
  406. # external modules needs include/linux/autoconf.h and include/config/auto.conf
  407. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  408. PHONY += include/config/auto.conf
  409. include/config/auto.conf:
  410. $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
  411. echo; \
  412. echo " ERROR: Kernel configuration is invalid."; \
  413. echo " include/linux/autoconf.h or $@ are missing."; \
  414. echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  415. echo; \
  416. /bin/false)
  417. endif # KBUILD_EXTMOD
  418. else
  419. # Dummy target needed, because used as prerequisite
  420. include/config/auto.conf: ;
  421. endif # $(dot-config)
  422. # The all: target is the default when no target is given on the
  423. # command line.
  424. # This allow a user to issue only 'make' to build a kernel including modules
  425. # Defaults vmlinux but it is usually overridden in the arch makefile
  426. all: vmlinux
  427. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  428. KBUILD_CFLAGS += -Os
  429. else
  430. KBUILD_CFLAGS += -O2
  431. endif
  432. include $(srctree)/arch/$(SRCARCH)/Makefile
  433. ifneq ($(CONFIG_FRAME_WARN),0)
  434. KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  435. endif
  436. # Force gcc to behave correct even for buggy distributions
  437. ifndef CONFIG_CC_STACKPROTECTOR
  438. KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
  439. endif
  440. ifdef CONFIG_FRAME_POINTER
  441. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  442. else
  443. KBUILD_CFLAGS += -fomit-frame-pointer
  444. endif
  445. ifdef CONFIG_DEBUG_INFO
  446. KBUILD_CFLAGS += -g
  447. KBUILD_AFLAGS += -gdwarf-2
  448. endif
  449. ifdef CONFIG_FUNCTION_TRACER
  450. KBUILD_CFLAGS += -pg
  451. endif
  452. # We trigger additional mismatches with less inlining
  453. ifdef CONFIG_DEBUG_SECTION_MISMATCH
  454. KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  455. endif
  456. # arch Makefile may override CC so keep this after arch Makefile is included
  457. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  458. CHECKFLAGS += $(NOSTDINC_FLAGS)
  459. # warn about C99 declaration after statement
  460. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  461. # disable pointer signed / unsigned warnings in gcc 4.0
  462. KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  463. # disable invalid "can't wrap" optimizations for signed / pointers
  464. KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
  465. # revert to pre-gcc-4.4 behaviour of .eh_frame
  466. KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
  467. # fix a Linaro gcc-4.6 bug (on Ubuntu Precise at least) that stops old ARM kernels booting
  468. KBUILD_CFLAGS += $(call cc-option,-mno-unaligned-access)
  469. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  470. # But warn user when we do so
  471. warn-assign = \
  472. $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
  473. ifneq ($(KCPPFLAGS),)
  474. $(call warn-assign,CPPFLAGS)
  475. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  476. endif
  477. ifneq ($(KAFLAGS),)
  478. $(call warn-assign,AFLAGS)
  479. KBUILD_AFLAGS += $(KAFLAGS)
  480. endif
  481. ifneq ($(KCFLAGS),)
  482. $(call warn-assign,CFLAGS)
  483. KBUILD_CFLAGS += $(KCFLAGS)
  484. endif
  485. # Use --build-id when available.
  486. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  487. $(call ld-option, -Wl$(comma)--build-id,))
  488. LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  489. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  490. ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
  491. LDFLAGS_vmlinux += -X
  492. endif
  493. # Default kernel image to build when no specific target is given.
  494. # KBUILD_IMAGE may be overruled on the command line or
  495. # set in the environment
  496. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  497. # this default value
  498. export KBUILD_IMAGE ?= vmlinux
  499. #
  500. # INSTALL_PATH specifies where to place the updated kernel and system map
  501. # images. Default is /boot, but you can set it to other values
  502. export INSTALL_PATH ?= /boot
  503. #
  504. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  505. # relocations required by build roots. This is not defined in the
  506. # makefile but the argument can be passed to make if needed.
  507. #
  508. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  509. export MODLIB
  510. #
  511. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  512. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  513. # the default option --strip-debug will be used. Otherwise,
  514. # INSTALL_MOD_STRIP will used as the options to the strip command.
  515. ifdef INSTALL_MOD_STRIP
  516. ifeq ($(INSTALL_MOD_STRIP),1)
  517. mod_strip_cmd = $(STRIP) --strip-debug
  518. else
  519. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  520. endif # INSTALL_MOD_STRIP=1
  521. else
  522. mod_strip_cmd = true
  523. endif # INSTALL_MOD_STRIP
  524. export mod_strip_cmd
  525. ifeq ($(KBUILD_EXTMOD),)
  526. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  527. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  528. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  529. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  530. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  531. $(init-n) $(init-) \
  532. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  533. $(net-n) $(net-) $(libs-n) $(libs-))))
  534. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  535. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  536. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  537. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  538. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  539. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  540. libs-y := $(libs-y1) $(libs-y2)
  541. # Build vmlinux
  542. # ---------------------------------------------------------------------------
  543. # vmlinux is built from the objects selected by $(vmlinux-init) and
  544. # $(vmlinux-main). Most are built-in.o files from top-level directories
  545. # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  546. # Ordering when linking is important, and $(vmlinux-init) must be first.
  547. #
  548. # vmlinux
  549. # ^
  550. # |
  551. # +-< $(vmlinux-init)
  552. # | +--< init/version.o + more
  553. # |
  554. # +--< $(vmlinux-main)
  555. # | +--< driver/built-in.o mm/built-in.o + more
  556. # |
  557. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  558. #
  559. # vmlinux version (uname -v) cannot be updated during normal
  560. # descending-into-subdirs phase since we do not yet know if we need to
  561. # update vmlinux.
  562. # Therefore this step is delayed until just before final link of vmlinux -
  563. # except in the kallsyms case where it is done just before adding the
  564. # symbols to the kernel.
  565. #
  566. # System.map is generated to document addresses of all kernel symbols
  567. vmlinux-init := $(head-y) $(init-y)
  568. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  569. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  570. vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
  571. export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
  572. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  573. # May be overridden by arch/$(ARCH)/Makefile
  574. quiet_cmd_vmlinux__ ?= LD $@
  575. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  576. -T $(vmlinux-lds) $(vmlinux-init) \
  577. --start-group $(vmlinux-main) --end-group \
  578. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
  579. # Generate new vmlinux version
  580. quiet_cmd_vmlinux_version = GEN .version
  581. cmd_vmlinux_version = set -e; \
  582. if [ ! -r .version ]; then \
  583. rm -f .version; \
  584. echo 1 >.version; \
  585. else \
  586. mv .version .old_version; \
  587. expr 0$$(cat .old_version) + 1 >.version; \
  588. fi; \
  589. $(MAKE) $(build)=init
  590. # Generate System.map
  591. quiet_cmd_sysmap = SYSMAP
  592. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  593. # Link of vmlinux
  594. # If CONFIG_KALLSYMS is set .version is already updated
  595. # Generate System.map and verify that the content is consistent
  596. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  597. # First command is ':' to allow us to use + in front of the rule
  598. define rule_vmlinux__
  599. :
  600. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  601. $(call cmd,vmlinux__)
  602. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  603. $(Q)$(if $($(quiet)cmd_sysmap), \
  604. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  605. $(cmd_sysmap) $@ System.map; \
  606. if [ $$? -ne 0 ]; then \
  607. rm -f $@; \
  608. /bin/false; \
  609. fi;
  610. $(verify_kallsyms)
  611. endef
  612. ifdef CONFIG_KALLSYMS
  613. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  614. # It's a three stage process:
  615. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  616. # empty
  617. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  618. # the right size - vmlinux version (uname -v) is updated during this step
  619. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  620. # but due to the added section, some addresses have shifted.
  621. # From here, we generate a correct .tmp_kallsyms2.o
  622. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  623. # o Verify that the System.map from vmlinux matches the map from
  624. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  625. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  626. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  627. # temporary bypass to allow the kernel to be built while the
  628. # maintainers work out what went wrong with kallsyms.
  629. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  630. last_kallsyms := 3
  631. else
  632. last_kallsyms := 2
  633. endif
  634. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  635. define verify_kallsyms
  636. $(Q)$(if $($(quiet)cmd_sysmap), \
  637. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  638. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  639. $(Q)cmp -s System.map .tmp_System.map || \
  640. (echo Inconsistent kallsyms data; \
  641. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  642. rm .tmp_kallsyms* ; /bin/false )
  643. endef
  644. # Update vmlinux version before link
  645. # Use + in front of this rule to silent warning about make -j1
  646. # First command is ':' to allow us to use + in front of this rule
  647. cmd_ksym_ld = $(cmd_vmlinux__)
  648. define rule_ksym_ld
  649. :
  650. +$(call cmd,vmlinux_version)
  651. $(call cmd,vmlinux__)
  652. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  653. endef
  654. # Generate .S file with all kernel symbols
  655. quiet_cmd_kallsyms = KSYM $@
  656. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  657. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  658. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  659. $(call if_changed_dep,as_o_S)
  660. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  661. $(call cmd,kallsyms)
  662. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  663. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  664. $(call if_changed_rule,ksym_ld)
  665. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  666. $(call if_changed,vmlinux__)
  667. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  668. $(call if_changed,vmlinux__)
  669. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  670. $(KALLSYMS): scripts ;
  671. # Generate some data for debugging strange kallsyms problems
  672. debug_kallsyms: .tmp_map$(last_kallsyms)
  673. .tmp_map%: .tmp_vmlinux% FORCE
  674. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  675. .tmp_map3: .tmp_map2
  676. .tmp_map2: .tmp_map1
  677. endif # ifdef CONFIG_KALLSYMS
  678. # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
  679. # relevant sections renamed as per the linker script.
  680. quiet_cmd_vmlinux-modpost = LD $@
  681. cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
  682. $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
  683. $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
  684. define rule_vmlinux-modpost
  685. :
  686. +$(call cmd,vmlinux-modpost)
  687. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  688. $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
  689. endef
  690. # vmlinux image - including updated kernel symbols
  691. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
  692. ifdef CONFIG_HEADERS_CHECK
  693. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  694. endif
  695. ifdef CONFIG_SAMPLES
  696. $(Q)$(MAKE) $(build)=samples
  697. endif
  698. ifdef CONFIG_BUILD_DOCSRC
  699. $(Q)$(MAKE) $(build)=Documentation
  700. endif
  701. $(call vmlinux-modpost)
  702. $(call if_changed_rule,vmlinux__)
  703. $(Q)rm -f .old_version
  704. # build vmlinux.o first to catch section mismatch errors early
  705. ifdef CONFIG_KALLSYMS
  706. .tmp_vmlinux1: vmlinux.o
  707. endif
  708. modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
  709. vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
  710. $(call if_changed_rule,vmlinux-modpost)
  711. # The actual objects are generated when descending,
  712. # make sure no implicit rule kicks in
  713. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  714. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  715. # Preset locale variables to speed up the build process. Limit locale
  716. # tweaks to this spot to avoid wrong language settings when running
  717. # make menuconfig etc.
  718. # Error messages still appears in the original language
  719. PHONY += $(vmlinux-dirs)
  720. $(vmlinux-dirs): prepare scripts
  721. $(Q)$(MAKE) $(build)=$@
  722. # Build the kernel release string
  723. #
  724. # The KERNELRELEASE value built here is stored in the file
  725. # include/config/kernel.release, and is used when executing several
  726. # make targets, such as "make install" or "make modules_install."
  727. #
  728. # The eventual kernel release string consists of the following fields,
  729. # shown in a hierarchical format to show how smaller parts are concatenated
  730. # to form the larger and final value, with values coming from places like
  731. # the Makefile, kernel config options, make command line options and/or
  732. # SCM tag information.
  733. #
  734. # $(KERNELVERSION)
  735. # $(VERSION) eg, 2
  736. # $(PATCHLEVEL) eg, 6
  737. # $(SUBLEVEL) eg, 18
  738. # $(EXTRAVERSION) eg, -rc6
  739. # $(localver-full)
  740. # $(localver)
  741. # localversion* (files without backups, containing '~')
  742. # $(CONFIG_LOCALVERSION) (from kernel config setting)
  743. # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
  744. # ./scripts/setlocalversion (SCM tag, if one exists)
  745. # $(LOCALVERSION) (from make command line if provided)
  746. #
  747. # Note how the final $(localver-auto) string is included *only* if the
  748. # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
  749. # moment, only git is supported but other SCMs can edit the script
  750. # scripts/setlocalversion and add the appropriate checks as needed.
  751. pattern = ".*/localversion[^~]*"
  752. string = $(shell cat /dev/null \
  753. `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
  754. localver = $(subst $(space),, $(string) \
  755. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  756. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  757. # and if the SCM is know a tag from the SCM is appended.
  758. # The appended tag is determined by the SCM used.
  759. #
  760. # .scmversion is used when generating rpm packages so we do not loose
  761. # the version information from the SCM when we do the build of the kernel
  762. # from the copied source
  763. ifdef CONFIG_LOCALVERSION_AUTO
  764. ifeq ($(wildcard .scmversion),)
  765. _localver-auto = $(shell $(CONFIG_SHELL) \
  766. $(srctree)/scripts/setlocalversion $(srctree))
  767. else
  768. _localver-auto = $(shell cat .scmversion 2> /dev/null)
  769. endif
  770. localver-auto = $(LOCALVERSION)$(_localver-auto)
  771. endif
  772. localver-full = $(localver)$(localver-auto)
  773. # Store (new) KERNELRELASE string in include/config/kernel.release
  774. kernelrelease = $(KERNELVERSION)$(localver-full)
  775. include/config/kernel.release: include/config/auto.conf FORCE
  776. $(Q)rm -f $@
  777. $(Q)echo $(kernelrelease) > $@
  778. # Things we need to do before we recursively start building the kernel
  779. # or the modules are listed in "prepare".
  780. # A multi level approach is used. prepareN is processed before prepareN-1.
  781. # archprepare is used in arch Makefiles and when processed asm symlink,
  782. # version.h and scripts_basic is processed / created.
  783. # Listed in dependency order
  784. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  785. # prepare3 is used to check if we are building in a separate output directory,
  786. # and if so do:
  787. # 1) Check that make has not been executed in the kernel src $(srctree)
  788. # 2) Create the include2 directory, used for the second asm symlink
  789. prepare3: include/config/kernel.release
  790. ifneq ($(KBUILD_SRC),)
  791. @$(kecho) ' Using $(srctree) as source for kernel'
  792. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  793. echo " $(srctree) is not clean, please run 'make mrproper'";\
  794. echo " in the '$(srctree)' directory.";\
  795. /bin/false; \
  796. fi;
  797. $(Q)if [ ! -d include2 ]; then \
  798. mkdir -p include2; \
  799. ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
  800. fi
  801. endif
  802. # prepare2 creates a makefile if using a separate output directory
  803. prepare2: prepare3 outputmakefile
  804. prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
  805. include/asm include/config/auto.conf
  806. $(cmd_crmodverdir)
  807. archprepare: prepare1 scripts_basic
  808. prepare0: archprepare FORCE
  809. $(Q)$(MAKE) $(build)=.
  810. $(Q)$(MAKE) $(build)=. missing-syscalls
  811. # All the preparing..
  812. prepare: prepare0
  813. # The asm symlink changes when $(ARCH) changes.
  814. # Detect this and ask user to run make mrproper
  815. # If asm is a stale symlink (point to dir that does not exist) remove it
  816. define check-symlink
  817. set -e; \
  818. if [ -L include/asm ]; then \
  819. asmlink=`readlink include/asm | cut -d '-' -f 2`; \
  820. if [ "$$asmlink" != "$(SRCARCH)" ]; then \
  821. echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
  822. echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
  823. exit 1; \
  824. fi; \
  825. test -e $$asmlink || rm include/asm; \
  826. elif [ -d include/asm ]; then \
  827. echo "ERROR: $@ is a directory but a symlink was expected";\
  828. exit 1; \
  829. fi
  830. endef
  831. # We create the target directory of the symlink if it does
  832. # not exist so the test in check-symlink works and we have a
  833. # directory for generated filesas used by some architectures.
  834. define create-symlink
  835. if [ ! -L include/asm ]; then \
  836. $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
  837. if [ ! -d include/asm-$(SRCARCH) ]; then \
  838. mkdir -p include/asm-$(SRCARCH); \
  839. fi; \
  840. ln -fsn asm-$(SRCARCH) $@; \
  841. fi
  842. endef
  843. include/asm: FORCE
  844. $(Q)$(check-symlink)
  845. $(Q)$(create-symlink)
  846. # Generate some files
  847. # ---------------------------------------------------------------------------
  848. # KERNELRELEASE can change from a few different places, meaning version.h
  849. # needs to be updated, so this check is forced on all builds
  850. uts_len := 64
  851. define filechk_utsrelease.h
  852. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  853. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  854. exit 1; \
  855. fi; \
  856. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  857. endef
  858. define filechk_version.h
  859. (echo \#define LINUX_VERSION_CODE $(shell \
  860. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  861. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  862. endef
  863. include/linux/version.h: $(srctree)/Makefile FORCE
  864. $(call filechk,version.h)
  865. include/linux/utsrelease.h: include/config/kernel.release FORCE
  866. $(call filechk,utsrelease.h)
  867. PHONY += headerdep
  868. headerdep:
  869. $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
  870. # ---------------------------------------------------------------------------
  871. PHONY += depend dep
  872. depend dep:
  873. @echo '*** Warning: make $@ is unnecessary now.'
  874. # ---------------------------------------------------------------------------
  875. # Firmware install
  876. INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
  877. export INSTALL_FW_PATH
  878. PHONY += firmware_install
  879. firmware_install: FORCE
  880. @mkdir -p $(objtree)/firmware
  881. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
  882. # ---------------------------------------------------------------------------
  883. # Kernel headers
  884. #Default location for installed headers
  885. export INSTALL_HDR_PATH = $(objtree)/usr
  886. hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
  887. # Find out where the Kbuild file is located to support
  888. # arch/$(ARCH)/include/asm
  889. hdr-dir = $(strip \
  890. $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
  891. arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
  892. # If we do an all arch process set dst to asm-$(hdr-arch)
  893. hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
  894. PHONY += __headers
  895. __headers: include/linux/version.h scripts_basic FORCE
  896. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  897. PHONY += headers_install_all
  898. headers_install_all:
  899. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
  900. PHONY += headers_install
  901. headers_install: __headers
  902. $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
  903. $(error Headers not exportable for the $(SRCARCH) architecture))
  904. $(Q)$(MAKE) $(hdr-inst)=include
  905. $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
  906. PHONY += headers_check_all
  907. headers_check_all: headers_install_all
  908. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
  909. PHONY += headers_check
  910. headers_check: headers_install
  911. $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
  912. $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
  913. # ---------------------------------------------------------------------------
  914. # Modules
  915. ifdef CONFIG_MODULES
  916. # By default, build modules as well
  917. all: modules
  918. # Build modules
  919. #
  920. # A module can be listed more than once in obj-m resulting in
  921. # duplicate lines in modules.order files. Those are removed
  922. # using awk while concatenating to the final file.
  923. PHONY += modules
  924. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  925. $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
  926. @$(kecho) ' Building modules, stage 2.';
  927. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  928. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
  929. # Target to prepare building external modules
  930. PHONY += modules_prepare
  931. modules_prepare: prepare scripts
  932. # Target to install modules
  933. PHONY += modules_install
  934. modules_install: _modinst_ _modinst_post
  935. PHONY += _modinst_
  936. _modinst_:
  937. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  938. echo "Warning: you may need to install module-init-tools"; \
  939. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  940. sleep 1; \
  941. fi
  942. @rm -rf $(MODLIB)/kernel
  943. @rm -f $(MODLIB)/source
  944. @mkdir -p $(MODLIB)/kernel
  945. @ln -s $(srctree) $(MODLIB)/source
  946. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  947. rm -f $(MODLIB)/build ; \
  948. ln -s $(objtree) $(MODLIB)/build ; \
  949. fi
  950. @cp -f $(objtree)/modules.order $(MODLIB)/
  951. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  952. # This depmod is only for convenience to give the initial
  953. # boot a modules.dep even before / is mounted read-write. However the
  954. # boot script depmod is the master version.
  955. PHONY += _modinst_post
  956. _modinst_post: _modinst_
  957. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
  958. $(call cmd,depmod)
  959. else # CONFIG_MODULES
  960. # Modules not configured
  961. # ---------------------------------------------------------------------------
  962. modules modules_install: FORCE
  963. @echo
  964. @echo "The present kernel configuration has modules disabled."
  965. @echo "Type 'make config' and enable loadable module support."
  966. @echo "Then build a kernel with module support enabled."
  967. @echo
  968. @exit 1
  969. endif # CONFIG_MODULES
  970. ###
  971. # Cleaning is done on three levels.
  972. # make clean Delete most generated files
  973. # Leave enough to build external modules
  974. # make mrproper Delete the current configuration, and all generated files
  975. # make distclean Remove editor backup files, patch leftover files and the like
  976. # Directories & files removed with 'make clean'
  977. CLEAN_DIRS += $(MODVERDIR)
  978. CLEAN_FILES += vmlinux System.map \
  979. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  980. # Directories & files removed with 'make mrproper'
  981. MRPROPER_DIRS += include/config include2 usr/include include/generated
  982. MRPROPER_FILES += .config .config.old include/asm .version .old_version \
  983. include/linux/autoconf.h include/linux/version.h \
  984. include/linux/utsrelease.h \
  985. include/linux/bounds.h include/asm*/asm-offsets.h \
  986. Module.symvers Module.markers tags TAGS cscope*
  987. # clean - Delete most, but leave enough to build external modules
  988. #
  989. clean: rm-dirs := $(CLEAN_DIRS)
  990. clean: rm-files := $(CLEAN_FILES)
  991. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
  992. PHONY += $(clean-dirs) clean archclean
  993. $(clean-dirs):
  994. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  995. clean: archclean $(clean-dirs)
  996. $(call cmd,rmdirs)
  997. $(call cmd,rmfiles)
  998. @find . $(RCS_FIND_IGNORE) \
  999. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1000. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  1001. -o -name '*.symtypes' -o -name 'modules.order' \
  1002. -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
  1003. -o -name '*.gcno' \) -type f -print | xargs rm -f
  1004. # mrproper - Delete all generated files, including .config
  1005. #
  1006. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  1007. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  1008. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  1009. PHONY += $(mrproper-dirs) mrproper archmrproper
  1010. $(mrproper-dirs):
  1011. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  1012. mrproper: clean archmrproper $(mrproper-dirs)
  1013. $(call cmd,rmdirs)
  1014. $(call cmd,rmfiles)
  1015. # distclean
  1016. #
  1017. PHONY += distclean
  1018. distclean: mrproper
  1019. @find $(srctree) $(RCS_FIND_IGNORE) \
  1020. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  1021. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  1022. -o -name '.*.rej' -o -size 0 \
  1023. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  1024. -type f -print | xargs rm -f
  1025. # Packaging of the kernel to various formats
  1026. # ---------------------------------------------------------------------------
  1027. # rpm target kept for backward compatibility
  1028. package-dir := $(srctree)/scripts/package
  1029. %pkg: include/config/kernel.release FORCE
  1030. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1031. rpm: include/config/kernel.release FORCE
  1032. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1033. # Brief documentation of the typical targets used
  1034. # ---------------------------------------------------------------------------
  1035. boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
  1036. boards := $(notdir $(boards))
  1037. board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  1038. board-dirs := $(sort $(notdir $(board-dirs:/=)))
  1039. help:
  1040. @echo 'Cleaning targets:'
  1041. @echo ' clean - Remove most generated files but keep the config and'
  1042. @echo ' enough build support to build external modules'
  1043. @echo ' mrproper - Remove all generated files + config + various backup files'
  1044. @echo ' distclean - mrproper + remove editor backup and patch files'
  1045. @echo ''
  1046. @echo 'Configuration targets:'
  1047. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  1048. @echo ''
  1049. @echo 'Other generic targets:'
  1050. @echo ' all - Build all targets marked with [*]'
  1051. @echo '* vmlinux - Build the bare kernel'
  1052. @echo '* modules - Build all modules'
  1053. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  1054. @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
  1055. @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
  1056. @echo ' dir/ - Build all files in dir and below'
  1057. @echo ' dir/file.[ois] - Build specified target only'
  1058. @echo ' dir/file.ko - Build module including final link'
  1059. @echo ' modules_prepare - Set up for building external modules'
  1060. @echo ' tags/TAGS - Generate tags file for editors'
  1061. @echo ' cscope - Generate cscope index'
  1062. @echo ' kernelrelease - Output the release version string'
  1063. @echo ' kernelversion - Output the version stored in Makefile'
  1064. @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  1065. echo ' (default: $(INSTALL_HDR_PATH))'; \
  1066. echo ''
  1067. @echo 'Static analysers'
  1068. @echo ' checkstack - Generate a list of stack hogs'
  1069. @echo ' namespacecheck - Name space analysis on compiled kernel'
  1070. @echo ' versioncheck - Sanity check on version.h usage'
  1071. @echo ' includecheck - Check for duplicate included header files'
  1072. @echo ' export_report - List the usages of all exported symbols'
  1073. @echo ' headers_check - Sanity check on exported headers'
  1074. @echo ' headerdep - Detect inclusion cycles in headers'; \
  1075. echo ''
  1076. @echo 'Kernel packaging:'
  1077. @$(MAKE) $(build)=$(package-dir) help
  1078. @echo ''
  1079. @echo 'Documentation targets:'
  1080. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  1081. @echo ''
  1082. @echo 'Architecture specific targets ($(SRCARCH)):'
  1083. @$(if $(archhelp),$(archhelp),\
  1084. echo ' No architecture specific help defined for $(SRCARCH)')
  1085. @echo ''
  1086. @$(if $(boards), \
  1087. $(foreach b, $(boards), \
  1088. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  1089. echo '')
  1090. @$(if $(board-dirs), \
  1091. $(foreach b, $(board-dirs), \
  1092. printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
  1093. printf " %-16s - Show all of the above\\n" help-boards; \
  1094. echo '')
  1095. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1096. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  1097. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  1098. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  1099. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  1100. @echo ''
  1101. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  1102. @echo 'For further info see the ./README file'
  1103. help-board-dirs := $(addprefix help-,$(board-dirs))
  1104. help-boards: $(help-board-dirs)
  1105. boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
  1106. $(help-board-dirs): help-%:
  1107. @echo 'Architecture specific targets ($(SRCARCH) $*):'
  1108. @$(if $(boards-per-dir), \
  1109. $(foreach b, $(boards-per-dir), \
  1110. printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
  1111. echo '')
  1112. # Documentation targets
  1113. # ---------------------------------------------------------------------------
  1114. %docs: scripts_basic FORCE
  1115. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  1116. else # KBUILD_EXTMOD
  1117. ###
  1118. # External module support.
  1119. # When building external modules the kernel used as basis is considered
  1120. # read-only, and no consistency checks are made and the make
  1121. # system is not used on the basis kernel. If updates are required
  1122. # in the basis kernel ordinary make commands (without M=...) must
  1123. # be used.
  1124. #
  1125. # The following are the only valid targets when building external
  1126. # modules.
  1127. # make M=dir clean Delete all automatically generated files
  1128. # make M=dir modules Make all modules in specified dir
  1129. # make M=dir Same as 'make M=dir modules'
  1130. # make M=dir modules_install
  1131. # Install the modules built in the module directory
  1132. # Assumes install directory is already created
  1133. # We are always building modules
  1134. KBUILD_MODULES := 1
  1135. PHONY += crmodverdir
  1136. crmodverdir:
  1137. $(cmd_crmodverdir)
  1138. PHONY += $(objtree)/Module.symvers
  1139. $(objtree)/Module.symvers:
  1140. @test -e $(objtree)/Module.symvers || ( \
  1141. echo; \
  1142. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1143. echo " is missing; modules will have no dependencies and modversions."; \
  1144. echo )
  1145. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1146. PHONY += $(module-dirs) modules
  1147. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1148. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1149. modules: $(module-dirs)
  1150. @$(kecho) ' Building modules, stage 2.';
  1151. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1152. PHONY += modules_install
  1153. modules_install: _emodinst_ _emodinst_post
  1154. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1155. PHONY += _emodinst_
  1156. _emodinst_:
  1157. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1158. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1159. PHONY += _emodinst_post
  1160. _emodinst_post: _emodinst_
  1161. $(call cmd,depmod)
  1162. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1163. PHONY += $(clean-dirs) clean
  1164. $(clean-dirs):
  1165. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1166. clean: rm-dirs := $(MODVERDIR)
  1167. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
  1168. $(KBUILD_EXTMOD)/Module.markers \
  1169. $(KBUILD_EXTMOD)/modules.order
  1170. clean: $(clean-dirs)
  1171. $(call cmd,rmdirs)
  1172. $(call cmd,rmfiles)
  1173. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  1174. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1175. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  1176. -o -name '*.gcno' \) -type f -print | xargs rm -f
  1177. help:
  1178. @echo ' Building external modules.'
  1179. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1180. @echo ''
  1181. @echo ' modules - default target, build the module(s)'
  1182. @echo ' modules_install - install the module'
  1183. @echo ' clean - remove generated files in module directory only'
  1184. @echo ''
  1185. # Dummies...
  1186. PHONY += prepare scripts
  1187. prepare: ;
  1188. scripts: ;
  1189. endif # KBUILD_EXTMOD
  1190. # Generate tags for editors
  1191. # ---------------------------------------------------------------------------
  1192. quiet_cmd_tags = GEN $@
  1193. cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
  1194. tags TAGS cscope: FORCE
  1195. $(call cmd,tags)
  1196. # Scripts to check various things for consistency
  1197. # ---------------------------------------------------------------------------
  1198. includecheck:
  1199. find * $(RCS_FIND_IGNORE) \
  1200. -name '*.[hcS]' -type f -print | sort \
  1201. | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
  1202. versioncheck:
  1203. find * $(RCS_FIND_IGNORE) \
  1204. -name '*.[hcS]' -type f -print | sort \
  1205. | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
  1206. namespacecheck:
  1207. $(PERL) $(srctree)/scripts/namespace.pl
  1208. export_report:
  1209. $(PERL) $(srctree)/scripts/export_report.pl
  1210. endif #ifeq ($(config-targets),1)
  1211. endif #ifeq ($(mixed-targets),1)
  1212. PHONY += checkstack kernelrelease kernelversion
  1213. # UML needs a little special treatment here. It wants to use the host
  1214. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1215. # else wants $(ARCH), including people doing cross-builds, which means
  1216. # that $(SUBARCH) doesn't work here.
  1217. ifeq ($(ARCH), um)
  1218. CHECKSTACK_ARCH := $(SUBARCH)
  1219. else
  1220. CHECKSTACK_ARCH := $(ARCH)
  1221. endif
  1222. checkstack:
  1223. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1224. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1225. kernelrelease:
  1226. $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  1227. $(error kernelrelease not valid - run 'make prepare' to update it))
  1228. kernelversion:
  1229. @echo $(KERNELVERSION)
  1230. # Single targets
  1231. # ---------------------------------------------------------------------------
  1232. # Single targets are compatible with:
  1233. # - build with mixed source and output
  1234. # - build with separate output dir 'make O=...'
  1235. # - external modules
  1236. #
  1237. # target-dir => where to store outputfile
  1238. # build-dir => directory in kernel source tree to use
  1239. ifeq ($(KBUILD_EXTMOD),)
  1240. build-dir = $(patsubst %/,%,$(dir $@))
  1241. target-dir = $(dir $@)
  1242. else
  1243. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1244. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1245. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1246. endif
  1247. %.s: %.c prepare scripts FORCE
  1248. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1249. %.i: %.c prepare scripts FORCE
  1250. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1251. %.o: %.c prepare scripts FORCE
  1252. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1253. %.lst: %.c prepare scripts FORCE
  1254. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1255. %.s: %.S prepare scripts FORCE
  1256. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1257. %.o: %.S prepare scripts FORCE
  1258. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1259. %.symtypes: %.c prepare scripts FORCE
  1260. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1261. # Modules
  1262. /: prepare scripts FORCE
  1263. $(cmd_crmodverdir)
  1264. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1265. $(build)=$(build-dir)
  1266. %/: prepare scripts FORCE
  1267. $(cmd_crmodverdir)
  1268. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1269. $(build)=$(build-dir)
  1270. %.ko: prepare scripts FORCE
  1271. $(cmd_crmodverdir)
  1272. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1273. $(build)=$(build-dir) $(@:.ko=.o)
  1274. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1275. # FIXME Should go into a make.lib or something
  1276. # ===========================================================================
  1277. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1278. cmd_rmdirs = rm -rf $(rm-dirs)
  1279. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1280. cmd_rmfiles = rm -f $(rm-files)
  1281. # Run depmod only if we have System.map and depmod is executable
  1282. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1283. cmd_depmod = \
  1284. if [ -r System.map -a -x $(DEPMOD) ]; then \
  1285. $(DEPMOD) -ae -F System.map \
  1286. $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
  1287. $(KERNELRELEASE); \
  1288. fi
  1289. # Create temporary dir for module support files
  1290. # clean it up only when building all modules
  1291. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1292. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1293. a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
  1294. $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
  1295. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1296. quiet_cmd_as_o_S = AS $@
  1297. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1298. # read all saved command lines
  1299. targets := $(wildcard $(sort $(targets)))
  1300. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1301. ifneq ($(cmd_files),)
  1302. $(cmd_files): ; # Do not try to update included dependency files
  1303. include $(cmd_files)
  1304. endif
  1305. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1306. # Usage:
  1307. # $(Q)$(MAKE) $(clean)=dir
  1308. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1309. endif # skip-makefile
  1310. PHONY += FORCE
  1311. FORCE:
  1312. # Declare the contents of the .PHONY variable as phony. We keep that
  1313. # information in a variable so we can use it in if_changed and friends.
  1314. .PHONY: $(PHONY)