Makefile 52 KB

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  1. VERSION = 2
  2. PATCHLEVEL = 6
  3. SUBLEVEL = 24
  4. EXTRAVERSION = -rc1
  5. NAME = Arr Matey! A Hairy Bilge Rat!
  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 avoid hard-to-debug behavour);
  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. ifdef V
  34. ifeq ("$(origin V)", "command line")
  35. KBUILD_VERBOSE = $(V)
  36. endif
  37. endif
  38. ifndef KBUILD_VERBOSE
  39. KBUILD_VERBOSE = 0
  40. endif
  41. # Call a source code checker (by default, "sparse") as part of the
  42. # C compilation.
  43. #
  44. # Use 'make C=1' to enable checking of only re-compiled files.
  45. # Use 'make C=2' to enable checking of *all* source files, regardless
  46. # of whether they are re-compiled or not.
  47. #
  48. # See the file "Documentation/sparse.txt" for more details, including
  49. # where to get the "sparse" utility.
  50. ifdef C
  51. ifeq ("$(origin C)", "command line")
  52. KBUILD_CHECKSRC = $(C)
  53. endif
  54. endif
  55. ifndef KBUILD_CHECKSRC
  56. KBUILD_CHECKSRC = 0
  57. endif
  58. # Use make M=dir to specify directory of external module to build
  59. # Old syntax make ... SUBDIRS=$PWD is still supported
  60. # Setting the environment variable KBUILD_EXTMOD take precedence
  61. ifdef SUBDIRS
  62. KBUILD_EXTMOD ?= $(SUBDIRS)
  63. endif
  64. ifdef M
  65. ifeq ("$(origin M)", "command line")
  66. KBUILD_EXTMOD := $(M)
  67. endif
  68. endif
  69. # kbuild supports saving output files in a separate directory.
  70. # To locate output files in a separate directory two syntaxes are supported.
  71. # In both cases the working directory must be the root of the kernel src.
  72. # 1) O=
  73. # Use "make O=dir/to/store/output/files/"
  74. #
  75. # 2) Set KBUILD_OUTPUT
  76. # Set the environment variable KBUILD_OUTPUT to point to the directory
  77. # where the output files shall be placed.
  78. # export KBUILD_OUTPUT=dir/to/store/output/files/
  79. # make
  80. #
  81. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  82. # variable.
  83. # KBUILD_SRC is set on invocation of make in OBJ directory
  84. # KBUILD_SRC is not intended to be used by the regular user (for now)
  85. ifeq ($(KBUILD_SRC),)
  86. # OK, Make called in directory where kernel src resides
  87. # Do we want to locate output files in a separate directory?
  88. ifdef O
  89. ifeq ("$(origin O)", "command line")
  90. KBUILD_OUTPUT := $(O)
  91. endif
  92. endif
  93. # That's our default target when none is given on the command line
  94. PHONY := _all
  95. _all:
  96. ifneq ($(KBUILD_OUTPUT),)
  97. # Invoke a second make in the output directory, passing relevant variables
  98. # check that the output directory actually exists
  99. saved-output := $(KBUILD_OUTPUT)
  100. KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  101. $(if $(KBUILD_OUTPUT),, \
  102. $(error output directory "$(saved-output)" does not exist))
  103. # Check that OUTPUT directory is not the same as where we have kernel src
  104. $(if $(filter-out $(KBUILD_OUTPUT),$(shell /bin/pwd)),, \
  105. $(error Output directory (O=...) specifies kernel src dir))
  106. PHONY += $(MAKECMDGOALS) sub-make
  107. $(filter-out _all sub-make,$(MAKECMDGOALS)) _all: sub-make
  108. $(Q)@:
  109. sub-make: FORCE
  110. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  111. KBUILD_SRC=$(CURDIR) \
  112. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
  113. $(filter-out _all sub-make,$(MAKECMDGOALS))
  114. # Leave processing to above invocation of make
  115. skip-makefile := 1
  116. endif # ifneq ($(KBUILD_OUTPUT),)
  117. endif # ifeq ($(KBUILD_SRC),)
  118. # We process the rest of the Makefile if this is the final invocation of make
  119. ifeq ($(skip-makefile),)
  120. # If building an external module we do not care about the all: rule
  121. # but instead _all depend on modules
  122. PHONY += all
  123. ifeq ($(KBUILD_EXTMOD),)
  124. _all: all
  125. else
  126. _all: modules
  127. endif
  128. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  129. TOPDIR := $(srctree)
  130. # FIXME - TOPDIR is obsolete, use srctree/objtree
  131. objtree := $(CURDIR)
  132. src := $(srctree)
  133. obj := $(objtree)
  134. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  135. export srctree objtree VPATH TOPDIR
  136. # SUBARCH tells the usermode build what the underlying arch is. That is set
  137. # first, and if a usermode build is happening, the "ARCH=um" on the command
  138. # line overrides the setting of ARCH below. If a native build is happening,
  139. # then ARCH is assigned, getting whatever value it gets normally, and
  140. # SUBARCH is subsequently ignored.
  141. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  142. -e s/arm.*/arm/ -e s/sa110/arm/ \
  143. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  144. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
  145. # Cross compiling and selecting different set of gcc/bin-utils
  146. # ---------------------------------------------------------------------------
  147. #
  148. # When performing cross compilation for other architectures ARCH shall be set
  149. # to the target architecture. (See arch/* for the possibilities).
  150. # ARCH can be set during invocation of make:
  151. # make ARCH=ia64
  152. # Another way is to have ARCH set in the environment.
  153. # The default ARCH is the host where make is executed.
  154. # CROSS_COMPILE specify the prefix used for all executables used
  155. # during compilation. Only gcc and related bin-utils executables
  156. # are prefixed with $(CROSS_COMPILE).
  157. # CROSS_COMPILE can be set on the command line
  158. # make CROSS_COMPILE=ia64-linux-
  159. # Alternatively CROSS_COMPILE can be set in the environment.
  160. # Default value for CROSS_COMPILE is not to prefix executables
  161. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  162. ARCH ?= $(SUBARCH)
  163. CROSS_COMPILE ?=
  164. # Architecture as present in compile.h
  165. UTS_MACHINE := $(ARCH)
  166. SRCARCH := $(ARCH)
  167. # for i386 and x86_64 we use SRCARCH equal to x86
  168. SRCARCH := $(if $(filter x86_64 i386,$(SRCARCH)),x86,$(SRCARCH))
  169. KCONFIG_CONFIG ?= .config
  170. # SHELL used by kbuild
  171. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  172. else if [ -x /bin/bash ]; then echo /bin/bash; \
  173. else echo sh; fi ; fi)
  174. HOSTCC = gcc
  175. HOSTCXX = g++
  176. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  177. HOSTCXXFLAGS = -O2
  178. # Decide whether to build built-in, modular, or both.
  179. # Normally, just do built-in.
  180. KBUILD_MODULES :=
  181. KBUILD_BUILTIN := 1
  182. # If we have only "make modules", don't compile built-in objects.
  183. # When we're building modules with modversions, we need to consider
  184. # the built-in objects during the descend as well, in order to
  185. # make sure the checksums are up to date before we record them.
  186. ifeq ($(MAKECMDGOALS),modules)
  187. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  188. endif
  189. # If we have "make <whatever> modules", compile modules
  190. # in addition to whatever we do anyway.
  191. # Just "make" or "make all" shall build modules as well
  192. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  193. KBUILD_MODULES := 1
  194. endif
  195. ifeq ($(MAKECMDGOALS),)
  196. KBUILD_MODULES := 1
  197. endif
  198. export KBUILD_MODULES KBUILD_BUILTIN
  199. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  200. # Beautify output
  201. # ---------------------------------------------------------------------------
  202. #
  203. # Normally, we echo the whole command before executing it. By making
  204. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  205. # $(quiet) to choose other forms of output instead, e.g.
  206. #
  207. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  208. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  209. #
  210. # If $(quiet) is empty, the whole command will be printed.
  211. # If it is set to "quiet_", only the short version will be printed.
  212. # If it is set to "silent_", nothing will be printed at all, since
  213. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  214. #
  215. # A simple variant is to prefix commands with $(Q) - that's useful
  216. # for commands that shall be hidden in non-verbose mode.
  217. #
  218. # $(Q)ln $@ :<
  219. #
  220. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  221. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  222. ifeq ($(KBUILD_VERBOSE),1)
  223. quiet =
  224. Q =
  225. else
  226. quiet=quiet_
  227. Q = @
  228. endif
  229. # If the user is running make -s (silent mode), suppress echoing of
  230. # commands
  231. ifneq ($(findstring s,$(MAKEFLAGS)),)
  232. quiet=silent_
  233. endif
  234. export quiet Q KBUILD_VERBOSE
  235. # Look for make include files relative to root of kernel src
  236. MAKEFLAGS += --include-dir=$(srctree)
  237. # We need some generic definitions.
  238. include $(srctree)/scripts/Kbuild.include
  239. # Make variables (CC, etc...)
  240. AS = $(CROSS_COMPILE)as
  241. LD = $(CROSS_COMPILE)ld
  242. CC = $(CROSS_COMPILE)gcc
  243. CPP = $(CC) -E
  244. AR = $(CROSS_COMPILE)ar
  245. NM = $(CROSS_COMPILE)nm
  246. STRIP = $(CROSS_COMPILE)strip
  247. OBJCOPY = $(CROSS_COMPILE)objcopy
  248. OBJDUMP = $(CROSS_COMPILE)objdump
  249. AWK = awk
  250. GENKSYMS = scripts/genksyms/genksyms
  251. DEPMOD = /sbin/depmod
  252. KALLSYMS = scripts/kallsyms
  253. PERL = perl
  254. CHECK = sparse
  255. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
  256. MODFLAGS = -DMODULE
  257. CFLAGS_MODULE = $(MODFLAGS)
  258. AFLAGS_MODULE = $(MODFLAGS)
  259. LDFLAGS_MODULE =
  260. CFLAGS_KERNEL =
  261. AFLAGS_KERNEL =
  262. # Use LINUXINCLUDE when you must reference the include/ directory.
  263. # Needed to be compatible with the O= option
  264. LINUXINCLUDE := -Iinclude \
  265. $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
  266. -include include/linux/autoconf.h
  267. KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
  268. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  269. -fno-strict-aliasing -fno-common \
  270. -Werror-implicit-function-declaration
  271. KBUILD_AFLAGS := -D__ASSEMBLY__
  272. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  273. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  274. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  275. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  276. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  277. export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
  278. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  279. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  280. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
  281. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  282. # When compiling out-of-tree modules, put MODVERDIR in the module
  283. # tree rather than in the kernel tree. The kernel tree might
  284. # even be read-only.
  285. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  286. # Files to ignore in find ... statements
  287. 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
  288. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  289. # ===========================================================================
  290. # Rules shared between *config targets and build targets
  291. # Basic helpers built in scripts/
  292. PHONY += scripts_basic
  293. scripts_basic:
  294. $(Q)$(MAKE) $(build)=scripts/basic
  295. # To avoid any implicit rule to kick in, define an empty command.
  296. scripts/basic/%: scripts_basic ;
  297. PHONY += outputmakefile
  298. # outputmakefile generates a Makefile in the output directory, if using a
  299. # separate output directory. This allows convenient use of make in the
  300. # output directory.
  301. outputmakefile:
  302. ifneq ($(KBUILD_SRC),)
  303. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  304. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  305. endif
  306. # To make sure we do not include .config for any of the *config targets
  307. # catch them early, and hand them over to scripts/kconfig/Makefile
  308. # It is allowed to specify more targets when calling make, including
  309. # mixing *config targets and build targets.
  310. # For example 'make oldconfig all'.
  311. # Detect when mixed targets is specified, and make a second invocation
  312. # of make so .config is not included in this case either (for *config).
  313. no-dot-config-targets := clean mrproper distclean \
  314. cscope TAGS tags help %docs check% \
  315. include/linux/version.h headers_% \
  316. kernelrelease kernelversion
  317. config-targets := 0
  318. mixed-targets := 0
  319. dot-config := 1
  320. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  321. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  322. dot-config := 0
  323. endif
  324. endif
  325. ifeq ($(KBUILD_EXTMOD),)
  326. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  327. config-targets := 1
  328. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  329. mixed-targets := 1
  330. endif
  331. endif
  332. endif
  333. ifeq ($(mixed-targets),1)
  334. # ===========================================================================
  335. # We're called with mixed targets (*config and build targets).
  336. # Handle them one by one.
  337. %:: FORCE
  338. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  339. else
  340. ifeq ($(config-targets),1)
  341. # ===========================================================================
  342. # *config targets only - make sure prerequisites are updated, and descend
  343. # in scripts/kconfig to make the *config target
  344. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  345. # KBUILD_DEFCONFIG may point out an alternative default configuration
  346. # used for 'make defconfig'
  347. include $(srctree)/arch/$(SRCARCH)/Makefile
  348. export KBUILD_DEFCONFIG
  349. config %config: scripts_basic outputmakefile FORCE
  350. $(Q)mkdir -p include/linux include/config
  351. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  352. else
  353. # ===========================================================================
  354. # Build targets only - this includes vmlinux, arch specific targets, clean
  355. # targets and others. In general all targets except *config targets.
  356. ifeq ($(KBUILD_EXTMOD),)
  357. # Additional helpers built in scripts/
  358. # Carefully list dependencies so we do not try to build scripts twice
  359. # in parallel
  360. PHONY += scripts
  361. scripts: scripts_basic include/config/auto.conf
  362. $(Q)$(MAKE) $(build)=$(@)
  363. # Objects we will link into vmlinux / subdirs we need to visit
  364. init-y := init/
  365. drivers-y := drivers/ sound/
  366. net-y := net/
  367. libs-y := lib/
  368. core-y := usr/
  369. endif # KBUILD_EXTMOD
  370. ifeq ($(dot-config),1)
  371. # Read in config
  372. -include include/config/auto.conf
  373. ifeq ($(KBUILD_EXTMOD),)
  374. # Read in dependencies to all Kconfig* files, make sure to run
  375. # oldconfig if changes are detected.
  376. -include include/config/auto.conf.cmd
  377. # To avoid any implicit rule to kick in, define an empty command
  378. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  379. # If .config is newer than include/config/auto.conf, someone tinkered
  380. # with it and forgot to run make oldconfig.
  381. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  382. # we execute the config step to be sure to catch updated Kconfig files
  383. include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  384. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  385. else
  386. # external modules needs include/linux/autoconf.h and include/config/auto.conf
  387. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  388. PHONY += include/config/auto.conf
  389. include/config/auto.conf:
  390. $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
  391. echo; \
  392. echo " ERROR: Kernel configuration is invalid."; \
  393. echo " include/linux/autoconf.h or $@ are missing."; \
  394. echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  395. echo; \
  396. /bin/false)
  397. endif # KBUILD_EXTMOD
  398. else
  399. # Dummy target needed, because used as prerequisite
  400. include/config/auto.conf: ;
  401. endif # $(dot-config)
  402. # The all: target is the default when no target is given on the
  403. # command line.
  404. # This allow a user to issue only 'make' to build a kernel including modules
  405. # Defaults vmlinux but it is usually overridden in the arch makefile
  406. all: vmlinux
  407. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  408. KBUILD_CFLAGS += -Os
  409. else
  410. KBUILD_CFLAGS += -O2
  411. endif
  412. include $(srctree)/arch/$(SRCARCH)/Makefile
  413. ifdef CONFIG_FRAME_POINTER
  414. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  415. else
  416. KBUILD_CFLAGS += -fomit-frame-pointer
  417. endif
  418. ifdef CONFIG_DEBUG_INFO
  419. KBUILD_CFLAGS += -g
  420. KBUILD_AFLAGS += -gdwarf-2
  421. endif
  422. # Force gcc to behave correct even for buggy distributions
  423. KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
  424. # arch Makefile may override CC so keep this after arch Makefile is included
  425. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  426. CHECKFLAGS += $(NOSTDINC_FLAGS)
  427. # warn about C99 declaration after statement
  428. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  429. # disable pointer signed / unsigned warnings in gcc 4.0
  430. KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  431. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  432. KBUILD_CPPFLAGS += $(CPPFLAGS)
  433. KBUILD_AFLAGS += $(AFLAGS)
  434. KBUILD_CFLAGS += $(CFLAGS)
  435. # Use --build-id when available.
  436. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  437. $(call ld-option, -Wl$(comma)--build-id,))
  438. LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  439. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  440. # Default kernel image to build when no specific target is given.
  441. # KBUILD_IMAGE may be overruled on the command line or
  442. # set in the environment
  443. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  444. # this default value
  445. export KBUILD_IMAGE ?= vmlinux
  446. #
  447. # INSTALL_PATH specifies where to place the updated kernel and system map
  448. # images. Default is /boot, but you can set it to other values
  449. export INSTALL_PATH ?= /boot
  450. #
  451. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  452. # relocations required by build roots. This is not defined in the
  453. # makefile but the argument can be passed to make if needed.
  454. #
  455. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  456. export MODLIB
  457. #
  458. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  459. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  460. # the default option --strip-debug will be used. Otherwise,
  461. # INSTALL_MOD_STRIP will used as the options to the strip command.
  462. ifdef INSTALL_MOD_STRIP
  463. ifeq ($(INSTALL_MOD_STRIP),1)
  464. mod_strip_cmd = $(STRIP) --strip-debug
  465. else
  466. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  467. endif # INSTALL_MOD_STRIP=1
  468. else
  469. mod_strip_cmd = true
  470. endif # INSTALL_MOD_STRIP
  471. export mod_strip_cmd
  472. ifeq ($(KBUILD_EXTMOD),)
  473. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  474. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  475. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  476. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  477. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  478. $(init-n) $(init-) \
  479. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  480. $(net-n) $(net-) $(libs-n) $(libs-))))
  481. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  482. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  483. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  484. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  485. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  486. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  487. libs-y := $(libs-y1) $(libs-y2)
  488. # Build vmlinux
  489. # ---------------------------------------------------------------------------
  490. # vmlinux is built from the objects selected by $(vmlinux-init) and
  491. # $(vmlinux-main). Most are built-in.o files from top-level directories
  492. # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  493. # Ordering when linking is important, and $(vmlinux-init) must be first.
  494. #
  495. # vmlinux
  496. # ^
  497. # |
  498. # +-< $(vmlinux-init)
  499. # | +--< init/version.o + more
  500. # |
  501. # +--< $(vmlinux-main)
  502. # | +--< driver/built-in.o mm/built-in.o + more
  503. # |
  504. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  505. #
  506. # vmlinux version (uname -v) cannot be updated during normal
  507. # descending-into-subdirs phase since we do not yet know if we need to
  508. # update vmlinux.
  509. # Therefore this step is delayed until just before final link of vmlinux -
  510. # except in the kallsyms case where it is done just before adding the
  511. # symbols to the kernel.
  512. #
  513. # System.map is generated to document addresses of all kernel symbols
  514. vmlinux-init := $(head-y) $(init-y)
  515. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  516. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  517. vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
  518. export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
  519. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  520. # May be overridden by arch/$(ARCH)/Makefile
  521. quiet_cmd_vmlinux__ ?= LD $@
  522. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  523. -T $(vmlinux-lds) $(vmlinux-init) \
  524. --start-group $(vmlinux-main) --end-group \
  525. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
  526. # Generate new vmlinux version
  527. quiet_cmd_vmlinux_version = GEN .version
  528. cmd_vmlinux_version = set -e; \
  529. if [ ! -r .version ]; then \
  530. rm -f .version; \
  531. echo 1 >.version; \
  532. else \
  533. mv .version .old_version; \
  534. expr 0$$(cat .old_version) + 1 >.version; \
  535. fi; \
  536. $(MAKE) $(build)=init
  537. # Generate System.map
  538. quiet_cmd_sysmap = SYSMAP
  539. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  540. # Link of vmlinux
  541. # If CONFIG_KALLSYMS is set .version is already updated
  542. # Generate System.map and verify that the content is consistent
  543. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  544. # First command is ':' to allow us to use + in front of the rule
  545. define rule_vmlinux__
  546. :
  547. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  548. $(call cmd,vmlinux__)
  549. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  550. $(Q)$(if $($(quiet)cmd_sysmap), \
  551. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  552. $(cmd_sysmap) $@ System.map; \
  553. if [ $$? -ne 0 ]; then \
  554. rm -f $@; \
  555. /bin/false; \
  556. fi;
  557. $(verify_kallsyms)
  558. endef
  559. ifdef CONFIG_KALLSYMS
  560. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  561. # It's a three stage process:
  562. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  563. # empty
  564. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  565. # the right size - vmlinux version (uname -v) is updated during this step
  566. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  567. # but due to the added section, some addresses have shifted.
  568. # From here, we generate a correct .tmp_kallsyms2.o
  569. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  570. # o Verify that the System.map from vmlinux matches the map from
  571. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  572. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  573. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  574. # temporary bypass to allow the kernel to be built while the
  575. # maintainers work out what went wrong with kallsyms.
  576. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  577. last_kallsyms := 3
  578. else
  579. last_kallsyms := 2
  580. endif
  581. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  582. define verify_kallsyms
  583. $(Q)$(if $($(quiet)cmd_sysmap), \
  584. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  585. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  586. $(Q)cmp -s System.map .tmp_System.map || \
  587. (echo Inconsistent kallsyms data; \
  588. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  589. rm .tmp_kallsyms* ; /bin/false )
  590. endef
  591. # Update vmlinux version before link
  592. # Use + in front of this rule to silent warning about make -j1
  593. # First command is ':' to allow us to use + in front of this rule
  594. cmd_ksym_ld = $(cmd_vmlinux__)
  595. define rule_ksym_ld
  596. :
  597. +$(call cmd,vmlinux_version)
  598. $(call cmd,vmlinux__)
  599. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  600. endef
  601. # Generate .S file with all kernel symbols
  602. quiet_cmd_kallsyms = KSYM $@
  603. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  604. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  605. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  606. $(call if_changed_dep,as_o_S)
  607. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  608. $(call cmd,kallsyms)
  609. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  610. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  611. $(call if_changed_rule,ksym_ld)
  612. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  613. $(call if_changed,vmlinux__)
  614. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  615. $(call if_changed,vmlinux__)
  616. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  617. $(KALLSYMS): scripts ;
  618. # Generate some data for debugging strange kallsyms problems
  619. debug_kallsyms: .tmp_map$(last_kallsyms)
  620. .tmp_map%: .tmp_vmlinux% FORCE
  621. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  622. .tmp_map3: .tmp_map2
  623. .tmp_map2: .tmp_map1
  624. endif # ifdef CONFIG_KALLSYMS
  625. # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
  626. # relevant sections renamed as per the linker script.
  627. quiet_cmd_vmlinux-modpost = LD $@
  628. cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
  629. $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
  630. $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
  631. define rule_vmlinux-modpost
  632. :
  633. +$(call cmd,vmlinux-modpost)
  634. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  635. $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
  636. endef
  637. # vmlinux image - including updated kernel symbols
  638. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
  639. ifdef CONFIG_HEADERS_CHECK
  640. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  641. endif
  642. ifdef CONFIG_SAMPLES
  643. $(Q)$(MAKE) $(build)=samples
  644. endif
  645. $(call vmlinux-modpost)
  646. $(call if_changed_rule,vmlinux__)
  647. $(Q)rm -f .old_version
  648. vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
  649. $(call if_changed_rule,vmlinux-modpost)
  650. # The actual objects are generated when descending,
  651. # make sure no implicit rule kicks in
  652. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  653. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  654. # Preset locale variables to speed up the build process. Limit locale
  655. # tweaks to this spot to avoid wrong language settings when running
  656. # make menuconfig etc.
  657. # Error messages still appears in the original language
  658. PHONY += $(vmlinux-dirs)
  659. $(vmlinux-dirs): prepare scripts
  660. $(Q)$(MAKE) $(build)=$@
  661. # Build the kernel release string
  662. #
  663. # The KERNELRELEASE value built here is stored in the file
  664. # include/config/kernel.release, and is used when executing several
  665. # make targets, such as "make install" or "make modules_install."
  666. #
  667. # The eventual kernel release string consists of the following fields,
  668. # shown in a hierarchical format to show how smaller parts are concatenated
  669. # to form the larger and final value, with values coming from places like
  670. # the Makefile, kernel config options, make command line options and/or
  671. # SCM tag information.
  672. #
  673. # $(KERNELVERSION)
  674. # $(VERSION) eg, 2
  675. # $(PATCHLEVEL) eg, 6
  676. # $(SUBLEVEL) eg, 18
  677. # $(EXTRAVERSION) eg, -rc6
  678. # $(localver-full)
  679. # $(localver)
  680. # localversion* (files without backups, containing '~')
  681. # $(CONFIG_LOCALVERSION) (from kernel config setting)
  682. # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
  683. # ./scripts/setlocalversion (SCM tag, if one exists)
  684. # $(LOCALVERSION) (from make command line if provided)
  685. #
  686. # Note how the final $(localver-auto) string is included *only* if the
  687. # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
  688. # moment, only git is supported but other SCMs can edit the script
  689. # scripts/setlocalversion and add the appropriate checks as needed.
  690. pattern = ".*/localversion[^~]*"
  691. string = $(shell cat /dev/null \
  692. `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
  693. localver = $(subst $(space),, $(string) \
  694. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  695. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  696. # and if the SCM is know a tag from the SCM is appended.
  697. # The appended tag is determined by the SCM used.
  698. #
  699. # Currently, only git is supported.
  700. # Other SCMs can edit scripts/setlocalversion and add the appropriate
  701. # checks as needed.
  702. ifdef CONFIG_LOCALVERSION_AUTO
  703. _localver-auto = $(shell $(CONFIG_SHELL) \
  704. $(srctree)/scripts/setlocalversion $(srctree))
  705. localver-auto = $(LOCALVERSION)$(_localver-auto)
  706. endif
  707. localver-full = $(localver)$(localver-auto)
  708. # Store (new) KERNELRELASE string in include/config/kernel.release
  709. kernelrelease = $(KERNELVERSION)$(localver-full)
  710. include/config/kernel.release: include/config/auto.conf FORCE
  711. $(Q)rm -f $@
  712. $(Q)echo $(kernelrelease) > $@
  713. # Things we need to do before we recursively start building the kernel
  714. # or the modules are listed in "prepare".
  715. # A multi level approach is used. prepareN is processed before prepareN-1.
  716. # archprepare is used in arch Makefiles and when processed asm symlink,
  717. # version.h and scripts_basic is processed / created.
  718. # Listed in dependency order
  719. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  720. # prepare3 is used to check if we are building in a separate output directory,
  721. # and if so do:
  722. # 1) Check that make has not been executed in the kernel src $(srctree)
  723. # 2) Create the include2 directory, used for the second asm symlink
  724. prepare3: include/config/kernel.release
  725. ifneq ($(KBUILD_SRC),)
  726. @echo ' Using $(srctree) as source for kernel'
  727. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  728. echo " $(srctree) is not clean, please run 'make mrproper'";\
  729. echo " in the '$(srctree)' directory.";\
  730. /bin/false; \
  731. fi;
  732. $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
  733. $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
  734. endif
  735. # prepare2 creates a makefile if using a separate output directory
  736. prepare2: prepare3 outputmakefile
  737. prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
  738. include/asm include/config/auto.conf
  739. $(cmd_crmodverdir)
  740. archprepare: prepare1 scripts_basic
  741. prepare0: archprepare FORCE
  742. $(Q)$(MAKE) $(build)=.
  743. $(Q)$(MAKE) $(build)=. missing-syscalls
  744. # All the preparing..
  745. prepare: prepare0
  746. # Leave this as default for preprocessing vmlinux.lds.S, which is now
  747. # done in arch/$(ARCH)/kernel/Makefile
  748. export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
  749. # The asm symlink changes when $(ARCH) changes.
  750. # Detect this and ask user to run make mrproper
  751. include/asm: FORCE
  752. $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
  753. if [ -L include/asm ]; then \
  754. if [ "$$asmlink" != "$(SRCARCH)" ]; then \
  755. echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
  756. echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
  757. exit 1; \
  758. fi; \
  759. else \
  760. echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
  761. if [ ! -d include ]; then \
  762. mkdir -p include; \
  763. fi; \
  764. ln -fsn asm-$(SRCARCH) $@; \
  765. fi
  766. # Generate some files
  767. # ---------------------------------------------------------------------------
  768. # KERNELRELEASE can change from a few different places, meaning version.h
  769. # needs to be updated, so this check is forced on all builds
  770. uts_len := 64
  771. define filechk_utsrelease.h
  772. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  773. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  774. exit 1; \
  775. fi; \
  776. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  777. endef
  778. define filechk_version.h
  779. (echo \#define LINUX_VERSION_CODE $(shell \
  780. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  781. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  782. endef
  783. include/linux/version.h: $(srctree)/Makefile FORCE
  784. $(call filechk,version.h)
  785. include/linux/utsrelease.h: include/config/kernel.release FORCE
  786. $(call filechk,utsrelease.h)
  787. # ---------------------------------------------------------------------------
  788. PHONY += depend dep
  789. depend dep:
  790. @echo '*** Warning: make $@ is unnecessary now.'
  791. # ---------------------------------------------------------------------------
  792. # Kernel headers
  793. INSTALL_HDR_PATH=$(objtree)/usr
  794. export INSTALL_HDR_PATH
  795. HDRFILTER=generic i386 x86_64
  796. HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
  797. PHONY += headers_install_all
  798. headers_install_all: include/linux/version.h scripts_basic FORCE
  799. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  800. $(Q)for arch in $(HDRARCHES); do \
  801. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
  802. done
  803. PHONY += headers_install
  804. headers_install: include/linux/version.h scripts_basic FORCE
  805. @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  806. echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
  807. exit 1 ; fi
  808. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  809. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
  810. PHONY += headers_check_all
  811. headers_check_all: headers_install_all
  812. $(Q)for arch in $(HDRARCHES); do \
  813. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
  814. done
  815. PHONY += headers_check
  816. headers_check: headers_install
  817. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
  818. # ---------------------------------------------------------------------------
  819. # Modules
  820. ifdef CONFIG_MODULES
  821. # By default, build modules as well
  822. all: modules
  823. # Build modules
  824. PHONY += modules
  825. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  826. @echo ' Building modules, stage 2.';
  827. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  828. # Target to prepare building external modules
  829. PHONY += modules_prepare
  830. modules_prepare: prepare scripts
  831. # Target to install modules
  832. PHONY += modules_install
  833. modules_install: _modinst_ _modinst_post
  834. PHONY += _modinst_
  835. _modinst_:
  836. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  837. echo "Warning: you may need to install module-init-tools"; \
  838. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  839. sleep 1; \
  840. fi
  841. @rm -rf $(MODLIB)/kernel
  842. @rm -f $(MODLIB)/source
  843. @mkdir -p $(MODLIB)/kernel
  844. @ln -s $(srctree) $(MODLIB)/source
  845. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  846. rm -f $(MODLIB)/build ; \
  847. ln -s $(objtree) $(MODLIB)/build ; \
  848. fi
  849. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  850. # This depmod is only for convenience to give the initial
  851. # boot a modules.dep even before / is mounted read-write. However the
  852. # boot script depmod is the master version.
  853. PHONY += _modinst_post
  854. _modinst_post: _modinst_
  855. $(call cmd,depmod)
  856. else # CONFIG_MODULES
  857. # Modules not configured
  858. # ---------------------------------------------------------------------------
  859. modules modules_install: FORCE
  860. @echo
  861. @echo "The present kernel configuration has modules disabled."
  862. @echo "Type 'make config' and enable loadable module support."
  863. @echo "Then build a kernel with module support enabled."
  864. @echo
  865. @exit 1
  866. endif # CONFIG_MODULES
  867. ###
  868. # Cleaning is done on three levels.
  869. # make clean Delete most generated files
  870. # Leave enough to build external modules
  871. # make mrproper Delete the current configuration, and all generated files
  872. # make distclean Remove editor backup files, patch leftover files and the like
  873. # Directories & files removed with 'make clean'
  874. CLEAN_DIRS += $(MODVERDIR)
  875. CLEAN_FILES += vmlinux System.map \
  876. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  877. # Directories & files removed with 'make mrproper'
  878. MRPROPER_DIRS += include/config include2 usr/include
  879. MRPROPER_FILES += .config .config.old include/asm .version .old_version \
  880. include/linux/autoconf.h include/linux/version.h \
  881. include/linux/utsrelease.h \
  882. Module.symvers tags TAGS cscope*
  883. # clean - Delete most, but leave enough to build external modules
  884. #
  885. clean: rm-dirs := $(CLEAN_DIRS)
  886. clean: rm-files := $(CLEAN_FILES)
  887. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
  888. PHONY += $(clean-dirs) clean archclean
  889. $(clean-dirs):
  890. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  891. clean: archclean $(clean-dirs)
  892. $(call cmd,rmdirs)
  893. $(call cmd,rmfiles)
  894. @find . $(RCS_FIND_IGNORE) \
  895. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  896. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  897. -o -name '*.symtypes' \) \
  898. -type f -print | xargs rm -f
  899. # mrproper - Delete all generated files, including .config
  900. #
  901. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  902. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  903. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  904. PHONY += $(mrproper-dirs) mrproper archmrproper
  905. $(mrproper-dirs):
  906. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  907. mrproper: clean archmrproper $(mrproper-dirs)
  908. $(call cmd,rmdirs)
  909. $(call cmd,rmfiles)
  910. # distclean
  911. #
  912. PHONY += distclean
  913. distclean: mrproper
  914. @find $(srctree) $(RCS_FIND_IGNORE) \
  915. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  916. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  917. -o -name '.*.rej' -o -size 0 \
  918. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  919. -type f -print | xargs rm -f
  920. # Packaging of the kernel to various formats
  921. # ---------------------------------------------------------------------------
  922. # rpm target kept for backward compatibility
  923. package-dir := $(srctree)/scripts/package
  924. %pkg: include/config/kernel.release FORCE
  925. $(Q)$(MAKE) $(build)=$(package-dir) $@
  926. rpm: include/config/kernel.release FORCE
  927. $(Q)$(MAKE) $(build)=$(package-dir) $@
  928. # Brief documentation of the typical targets used
  929. # ---------------------------------------------------------------------------
  930. boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
  931. boards := $(notdir $(boards))
  932. help:
  933. @echo 'Cleaning targets:'
  934. @echo ' clean - Remove most generated files but keep the config and'
  935. @echo ' enough build support to build external modules'
  936. @echo ' mrproper - Remove all generated files + config + various backup files'
  937. @echo ' distclean - mrproper + remove editor backup and patch files'
  938. @echo ''
  939. @echo 'Configuration targets:'
  940. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  941. @echo ''
  942. @echo 'Other generic targets:'
  943. @echo ' all - Build all targets marked with [*]'
  944. @echo '* vmlinux - Build the bare kernel'
  945. @echo '* modules - Build all modules'
  946. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  947. @echo ' dir/ - Build all files in dir and below'
  948. @echo ' dir/file.[ois] - Build specified target only'
  949. @echo ' dir/file.ko - Build module including final link'
  950. @echo ' rpm - Build a kernel as an RPM package'
  951. @echo ' tags/TAGS - Generate tags file for editors'
  952. @echo ' cscope - Generate cscope index'
  953. @echo ' kernelrelease - Output the release version string'
  954. @echo ' kernelversion - Output the version stored in Makefile'
  955. @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  956. echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  957. echo ' (default: $(INSTALL_HDR_PATH))'; \
  958. fi
  959. @echo ''
  960. @echo 'Static analysers'
  961. @echo ' checkstack - Generate a list of stack hogs'
  962. @echo ' namespacecheck - Name space analysis on compiled kernel'
  963. @echo ' export_report - List the usages of all exported symbols'
  964. @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  965. echo ' headers_check - Sanity check on exported headers'; \
  966. fi
  967. @echo ''
  968. @echo 'Kernel packaging:'
  969. @$(MAKE) $(build)=$(package-dir) help
  970. @echo ''
  971. @echo 'Documentation targets:'
  972. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  973. @echo ''
  974. @echo 'Architecture specific targets ($(ARCH)):'
  975. @$(if $(archhelp),$(archhelp),\
  976. echo ' No architecture specific help defined for $(ARCH)')
  977. @echo ''
  978. @$(if $(boards), \
  979. $(foreach b, $(boards), \
  980. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  981. echo '')
  982. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  983. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  984. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  985. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  986. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  987. @echo ''
  988. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  989. @echo 'For further info see the ./README file'
  990. # Documentation targets
  991. # ---------------------------------------------------------------------------
  992. %docs: scripts_basic FORCE
  993. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  994. else # KBUILD_EXTMOD
  995. ###
  996. # External module support.
  997. # When building external modules the kernel used as basis is considered
  998. # read-only, and no consistency checks are made and the make
  999. # system is not used on the basis kernel. If updates are required
  1000. # in the basis kernel ordinary make commands (without M=...) must
  1001. # be used.
  1002. #
  1003. # The following are the only valid targets when building external
  1004. # modules.
  1005. # make M=dir clean Delete all automatically generated files
  1006. # make M=dir modules Make all modules in specified dir
  1007. # make M=dir Same as 'make M=dir modules'
  1008. # make M=dir modules_install
  1009. # Install the modules built in the module directory
  1010. # Assumes install directory is already created
  1011. # We are always building modules
  1012. KBUILD_MODULES := 1
  1013. PHONY += crmodverdir
  1014. crmodverdir:
  1015. $(cmd_crmodverdir)
  1016. PHONY += $(objtree)/Module.symvers
  1017. $(objtree)/Module.symvers:
  1018. @test -e $(objtree)/Module.symvers || ( \
  1019. echo; \
  1020. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1021. echo " is missing; modules will have no dependencies and modversions."; \
  1022. echo )
  1023. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1024. PHONY += $(module-dirs) modules
  1025. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1026. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1027. modules: $(module-dirs)
  1028. @echo ' Building modules, stage 2.';
  1029. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1030. PHONY += modules_install
  1031. modules_install: _emodinst_ _emodinst_post
  1032. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1033. PHONY += _emodinst_
  1034. _emodinst_:
  1035. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1036. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1037. PHONY += _emodinst_post
  1038. _emodinst_post: _emodinst_
  1039. $(call cmd,depmod)
  1040. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1041. PHONY += $(clean-dirs) clean
  1042. $(clean-dirs):
  1043. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1044. clean: rm-dirs := $(MODVERDIR)
  1045. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1046. clean: $(clean-dirs)
  1047. $(call cmd,rmdirs)
  1048. $(call cmd,rmfiles)
  1049. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  1050. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1051. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  1052. -type f -print | xargs rm -f
  1053. help:
  1054. @echo ' Building external modules.'
  1055. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1056. @echo ''
  1057. @echo ' modules - default target, build the module(s)'
  1058. @echo ' modules_install - install the module'
  1059. @echo ' clean - remove generated files in module directory only'
  1060. @echo ''
  1061. # Dummies...
  1062. PHONY += prepare scripts
  1063. prepare: ;
  1064. scripts: ;
  1065. endif # KBUILD_EXTMOD
  1066. # Generate tags for editors
  1067. # ---------------------------------------------------------------------------
  1068. #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
  1069. #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
  1070. #Adding $(srctree) adds about 20M on i386 to the size of the output file!
  1071. ifeq ($(src),$(obj))
  1072. __srctree =
  1073. else
  1074. __srctree = $(srctree)/
  1075. endif
  1076. ifeq ($(ALLSOURCE_ARCHS),)
  1077. ifeq ($(ARCH),um)
  1078. ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
  1079. else
  1080. ALLINCLUDE_ARCHS := $(SRCARCH)
  1081. endif
  1082. else
  1083. #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
  1084. ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
  1085. endif
  1086. # Take care of arch/x86
  1087. ifeq ($(ARCH), $(SRCARCH))
  1088. ALLSOURCE_ARCHS := $(ARCH)
  1089. else
  1090. ALLSOURCE_ARCHS := $(ARCH) $(SRCARCH)
  1091. endif
  1092. define find-sources
  1093. ( for arch in $(ALLSOURCE_ARCHS) ; do \
  1094. find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
  1095. -name $1 -print; \
  1096. done ; \
  1097. find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
  1098. -name $1 -print; \
  1099. find $(__srctree)include $(RCS_FIND_IGNORE) \
  1100. \( -name config -o -name 'asm-*' \) -prune \
  1101. -o -name $1 -print; \
  1102. for arch in $(ALLINCLUDE_ARCHS) ; do \
  1103. find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
  1104. -name $1 -print; \
  1105. done ; \
  1106. find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
  1107. -name $1 -print; \
  1108. find $(__srctree) $(RCS_FIND_IGNORE) \
  1109. \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
  1110. -name $1 -print; \
  1111. )
  1112. endef
  1113. define all-sources
  1114. $(call find-sources,'*.[chS]')
  1115. endef
  1116. define all-kconfigs
  1117. $(call find-sources,'Kconfig*')
  1118. endef
  1119. define all-defconfigs
  1120. $(call find-sources,'defconfig')
  1121. endef
  1122. define xtags
  1123. if $1 --version 2>&1 | grep -iq exuberant; then \
  1124. $(all-sources) | xargs $1 -a \
  1125. -I __initdata,__exitdata,__acquires,__releases \
  1126. -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
  1127. --extra=+f --c-kinds=+px \
  1128. --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
  1129. $(all-kconfigs) | xargs $1 -a \
  1130. --langdef=kconfig \
  1131. --language-force=kconfig \
  1132. --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
  1133. $(all-defconfigs) | xargs -r $1 -a \
  1134. --langdef=dotconfig \
  1135. --language-force=dotconfig \
  1136. --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
  1137. elif $1 --version 2>&1 | grep -iq emacs; then \
  1138. $(all-sources) | xargs $1 -a; \
  1139. $(all-kconfigs) | xargs $1 -a \
  1140. --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
  1141. $(all-defconfigs) | xargs -r $1 -a \
  1142. --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
  1143. else \
  1144. $(all-sources) | xargs $1 -a; \
  1145. fi
  1146. endef
  1147. quiet_cmd_cscope-file = FILELST cscope.files
  1148. cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
  1149. quiet_cmd_cscope = MAKE cscope.out
  1150. cmd_cscope = cscope -b
  1151. cscope: FORCE
  1152. $(call cmd,cscope-file)
  1153. $(call cmd,cscope)
  1154. quiet_cmd_TAGS = MAKE $@
  1155. define cmd_TAGS
  1156. rm -f $@; \
  1157. $(call xtags,etags)
  1158. endef
  1159. TAGS: FORCE
  1160. $(call cmd,TAGS)
  1161. quiet_cmd_tags = MAKE $@
  1162. define cmd_tags
  1163. rm -f $@; \
  1164. $(call xtags,ctags)
  1165. endef
  1166. tags: FORCE
  1167. $(call cmd,tags)
  1168. # Scripts to check various things for consistency
  1169. # ---------------------------------------------------------------------------
  1170. includecheck:
  1171. find * $(RCS_FIND_IGNORE) \
  1172. -name '*.[hcS]' -type f -print | sort \
  1173. | xargs $(PERL) -w scripts/checkincludes.pl
  1174. versioncheck:
  1175. find * $(RCS_FIND_IGNORE) \
  1176. -name '*.[hcS]' -type f -print | sort \
  1177. | xargs $(PERL) -w scripts/checkversion.pl
  1178. namespacecheck:
  1179. $(PERL) $(srctree)/scripts/namespace.pl
  1180. export_report:
  1181. $(PERL) $(srctree)/scripts/export_report.pl
  1182. endif #ifeq ($(config-targets),1)
  1183. endif #ifeq ($(mixed-targets),1)
  1184. PHONY += checkstack kernelrelease kernelversion
  1185. # UML needs a little special treatment here. It wants to use the host
  1186. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1187. # else wants $(ARCH), including people doing cross-builds, which means
  1188. # that $(SUBARCH) doesn't work here.
  1189. ifeq ($(ARCH), um)
  1190. CHECKSTACK_ARCH := $(SUBARCH)
  1191. else
  1192. CHECKSTACK_ARCH := $(ARCH)
  1193. endif
  1194. checkstack:
  1195. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1196. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1197. kernelrelease:
  1198. $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  1199. $(error kernelrelease not valid - run 'make prepare' to update it))
  1200. kernelversion:
  1201. @echo $(KERNELVERSION)
  1202. # Single targets
  1203. # ---------------------------------------------------------------------------
  1204. # Single targets are compatible with:
  1205. # - build whith mixed source and output
  1206. # - build with separate output dir 'make O=...'
  1207. # - external modules
  1208. #
  1209. # target-dir => where to store outputfile
  1210. # build-dir => directory in kernel source tree to use
  1211. ifeq ($(KBUILD_EXTMOD),)
  1212. build-dir = $(patsubst %/,%,$(dir $@))
  1213. target-dir = $(dir $@)
  1214. else
  1215. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1216. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1217. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1218. endif
  1219. %.s: %.c prepare scripts FORCE
  1220. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1221. %.i: %.c prepare scripts FORCE
  1222. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1223. %.o: %.c prepare scripts FORCE
  1224. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1225. %.lst: %.c prepare scripts FORCE
  1226. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1227. %.s: %.S prepare scripts FORCE
  1228. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1229. %.o: %.S prepare scripts FORCE
  1230. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1231. %.symtypes: %.c prepare scripts FORCE
  1232. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1233. # Modules
  1234. / %/: prepare scripts FORCE
  1235. $(cmd_crmodverdir)
  1236. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1237. $(build)=$(build-dir)
  1238. %.ko: prepare scripts FORCE
  1239. $(cmd_crmodverdir)
  1240. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1241. $(build)=$(build-dir) $(@:.ko=.o)
  1242. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1243. # FIXME Should go into a make.lib or something
  1244. # ===========================================================================
  1245. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1246. cmd_rmdirs = rm -rf $(rm-dirs)
  1247. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1248. cmd_rmfiles = rm -f $(rm-files)
  1249. # Run depmod only is we have System.map and depmod is executable
  1250. # and we build for the host arch
  1251. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1252. cmd_depmod = \
  1253. if [ -r System.map -a -x $(DEPMOD) ]; then \
  1254. $(DEPMOD) -ae -F System.map \
  1255. $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
  1256. $(KERNELRELEASE); \
  1257. fi
  1258. # Create temporary dir for module support files
  1259. # clean it up only when building all modules
  1260. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1261. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1262. a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
  1263. $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
  1264. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1265. quiet_cmd_as_o_S = AS $@
  1266. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1267. # read all saved command lines
  1268. targets := $(wildcard $(sort $(targets)))
  1269. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1270. ifneq ($(cmd_files),)
  1271. $(cmd_files): ; # Do not try to update included dependency files
  1272. include $(cmd_files)
  1273. endif
  1274. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1275. # Usage:
  1276. # $(Q)$(MAKE) $(clean)=dir
  1277. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1278. endif # skip-makefile
  1279. PHONY += FORCE
  1280. FORCE:
  1281. # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
  1282. Makefile: ;
  1283. # Declare the contents of the .PHONY variable as phony. We keep that
  1284. # information in a variable se we can use it in if_changed and friends.
  1285. .PHONY: $(PHONY)