Makefile 51 KB

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  1. VERSION = 2
  2. PATCHLEVEL = 6
  3. SUBLEVEL = 23
  4. EXTRAVERSION =
  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)
  107. $(filter-out _all,$(MAKECMDGOALS)) _all:
  108. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  109. KBUILD_SRC=$(CURDIR) \
  110. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
  111. # Leave processing to above invocation of make
  112. skip-makefile := 1
  113. endif # ifneq ($(KBUILD_OUTPUT),)
  114. endif # ifeq ($(KBUILD_SRC),)
  115. # We process the rest of the Makefile if this is the final invocation of make
  116. ifeq ($(skip-makefile),)
  117. # If building an external module we do not care about the all: rule
  118. # but instead _all depend on modules
  119. PHONY += all
  120. ifeq ($(KBUILD_EXTMOD),)
  121. _all: all
  122. else
  123. _all: modules
  124. endif
  125. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  126. TOPDIR := $(srctree)
  127. # FIXME - TOPDIR is obsolete, use srctree/objtree
  128. objtree := $(CURDIR)
  129. src := $(srctree)
  130. obj := $(objtree)
  131. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  132. export srctree objtree VPATH TOPDIR
  133. # SUBARCH tells the usermode build what the underlying arch is. That is set
  134. # first, and if a usermode build is happening, the "ARCH=um" on the command
  135. # line overrides the setting of ARCH below. If a native build is happening,
  136. # then ARCH is assigned, getting whatever value it gets normally, and
  137. # SUBARCH is subsequently ignored.
  138. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  139. -e s/arm.*/arm/ -e s/sa110/arm/ \
  140. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  141. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
  142. # Cross compiling and selecting different set of gcc/bin-utils
  143. # ---------------------------------------------------------------------------
  144. #
  145. # When performing cross compilation for other architectures ARCH shall be set
  146. # to the target architecture. (See arch/* for the possibilities).
  147. # ARCH can be set during invocation of make:
  148. # make ARCH=ia64
  149. # Another way is to have ARCH set in the environment.
  150. # The default ARCH is the host where make is executed.
  151. # CROSS_COMPILE specify the prefix used for all executables used
  152. # during compilation. Only gcc and related bin-utils executables
  153. # are prefixed with $(CROSS_COMPILE).
  154. # CROSS_COMPILE can be set on the command line
  155. # make CROSS_COMPILE=ia64-linux-
  156. # Alternatively CROSS_COMPILE can be set in the environment.
  157. # Default value for CROSS_COMPILE is not to prefix executables
  158. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  159. ARCH ?= $(SUBARCH)
  160. CROSS_COMPILE ?=
  161. # Architecture as present in compile.h
  162. UTS_MACHINE := $(ARCH)
  163. SRCARCH := $(ARCH)
  164. KCONFIG_CONFIG ?= .config
  165. # SHELL used by kbuild
  166. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  167. else if [ -x /bin/bash ]; then echo /bin/bash; \
  168. else echo sh; fi ; fi)
  169. HOSTCC = gcc
  170. HOSTCXX = g++
  171. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  172. HOSTCXXFLAGS = -O2
  173. # Decide whether to build built-in, modular, or both.
  174. # Normally, just do built-in.
  175. KBUILD_MODULES :=
  176. KBUILD_BUILTIN := 1
  177. # If we have only "make modules", don't compile built-in objects.
  178. # When we're building modules with modversions, we need to consider
  179. # the built-in objects during the descend as well, in order to
  180. # make sure the checksums are up to date before we record them.
  181. ifeq ($(MAKECMDGOALS),modules)
  182. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  183. endif
  184. # If we have "make <whatever> modules", compile modules
  185. # in addition to whatever we do anyway.
  186. # Just "make" or "make all" shall build modules as well
  187. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  188. KBUILD_MODULES := 1
  189. endif
  190. ifeq ($(MAKECMDGOALS),)
  191. KBUILD_MODULES := 1
  192. endif
  193. export KBUILD_MODULES KBUILD_BUILTIN
  194. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  195. # Beautify output
  196. # ---------------------------------------------------------------------------
  197. #
  198. # Normally, we echo the whole command before executing it. By making
  199. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  200. # $(quiet) to choose other forms of output instead, e.g.
  201. #
  202. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  203. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  204. #
  205. # If $(quiet) is empty, the whole command will be printed.
  206. # If it is set to "quiet_", only the short version will be printed.
  207. # If it is set to "silent_", nothing will be printed at all, since
  208. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  209. #
  210. # A simple variant is to prefix commands with $(Q) - that's useful
  211. # for commands that shall be hidden in non-verbose mode.
  212. #
  213. # $(Q)ln $@ :<
  214. #
  215. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  216. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  217. ifeq ($(KBUILD_VERBOSE),1)
  218. quiet =
  219. Q =
  220. else
  221. quiet=quiet_
  222. Q = @
  223. endif
  224. # If the user is running make -s (silent mode), suppress echoing of
  225. # commands
  226. ifneq ($(findstring s,$(MAKEFLAGS)),)
  227. quiet=silent_
  228. endif
  229. export quiet Q KBUILD_VERBOSE
  230. # Look for make include files relative to root of kernel src
  231. MAKEFLAGS += --include-dir=$(srctree)
  232. # We need some generic definitions.
  233. include $(srctree)/scripts/Kbuild.include
  234. # Make variables (CC, etc...)
  235. AS = $(CROSS_COMPILE)as
  236. LD = $(CROSS_COMPILE)ld
  237. CC = $(CROSS_COMPILE)gcc
  238. CPP = $(CC) -E
  239. AR = $(CROSS_COMPILE)ar
  240. NM = $(CROSS_COMPILE)nm
  241. STRIP = $(CROSS_COMPILE)strip
  242. OBJCOPY = $(CROSS_COMPILE)objcopy
  243. OBJDUMP = $(CROSS_COMPILE)objdump
  244. AWK = awk
  245. GENKSYMS = scripts/genksyms/genksyms
  246. DEPMOD = /sbin/depmod
  247. KALLSYMS = scripts/kallsyms
  248. PERL = perl
  249. CHECK = sparse
  250. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
  251. MODFLAGS = -DMODULE
  252. CFLAGS_MODULE = $(MODFLAGS)
  253. AFLAGS_MODULE = $(MODFLAGS)
  254. LDFLAGS_MODULE =
  255. CFLAGS_KERNEL =
  256. AFLAGS_KERNEL =
  257. # Use LINUXINCLUDE when you must reference the include/ directory.
  258. # Needed to be compatible with the O= option
  259. LINUXINCLUDE := -Iinclude \
  260. $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
  261. -include include/linux/autoconf.h
  262. CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
  263. CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  264. -fno-strict-aliasing -fno-common \
  265. -Werror-implicit-function-declaration
  266. AFLAGS := -D__ASSEMBLY__
  267. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  268. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  269. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  270. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  271. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  272. export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
  273. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  274. export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  275. export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
  276. export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  277. # When compiling out-of-tree modules, put MODVERDIR in the module
  278. # tree rather than in the kernel tree. The kernel tree might
  279. # even be read-only.
  280. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  281. # Files to ignore in find ... statements
  282. 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
  283. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  284. # ===========================================================================
  285. # Rules shared between *config targets and build targets
  286. # Basic helpers built in scripts/
  287. PHONY += scripts_basic
  288. scripts_basic:
  289. $(Q)$(MAKE) $(build)=scripts/basic
  290. # To avoid any implicit rule to kick in, define an empty command.
  291. scripts/basic/%: scripts_basic ;
  292. PHONY += outputmakefile
  293. # outputmakefile generates a Makefile in the output directory, if using a
  294. # separate output directory. This allows convenient use of make in the
  295. # output directory.
  296. outputmakefile:
  297. ifneq ($(KBUILD_SRC),)
  298. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  299. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  300. endif
  301. # To make sure we do not include .config for any of the *config targets
  302. # catch them early, and hand them over to scripts/kconfig/Makefile
  303. # It is allowed to specify more targets when calling make, including
  304. # mixing *config targets and build targets.
  305. # For example 'make oldconfig all'.
  306. # Detect when mixed targets is specified, and make a second invocation
  307. # of make so .config is not included in this case either (for *config).
  308. no-dot-config-targets := clean mrproper distclean \
  309. cscope TAGS tags help %docs check% \
  310. include/linux/version.h headers_% \
  311. kernelrelease kernelversion
  312. config-targets := 0
  313. mixed-targets := 0
  314. dot-config := 1
  315. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  316. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  317. dot-config := 0
  318. endif
  319. endif
  320. ifeq ($(KBUILD_EXTMOD),)
  321. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  322. config-targets := 1
  323. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  324. mixed-targets := 1
  325. endif
  326. endif
  327. endif
  328. ifeq ($(mixed-targets),1)
  329. # ===========================================================================
  330. # We're called with mixed targets (*config and build targets).
  331. # Handle them one by one.
  332. %:: FORCE
  333. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  334. else
  335. ifeq ($(config-targets),1)
  336. # ===========================================================================
  337. # *config targets only - make sure prerequisites are updated, and descend
  338. # in scripts/kconfig to make the *config target
  339. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  340. # KBUILD_DEFCONFIG may point out an alternative default configuration
  341. # used for 'make defconfig'
  342. include $(srctree)/arch/$(ARCH)/Makefile
  343. export KBUILD_DEFCONFIG
  344. config %config: scripts_basic outputmakefile FORCE
  345. $(Q)mkdir -p include/linux include/config
  346. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  347. else
  348. # ===========================================================================
  349. # Build targets only - this includes vmlinux, arch specific targets, clean
  350. # targets and others. In general all targets except *config targets.
  351. ifeq ($(KBUILD_EXTMOD),)
  352. # Additional helpers built in scripts/
  353. # Carefully list dependencies so we do not try to build scripts twice
  354. # in parallel
  355. PHONY += scripts
  356. scripts: scripts_basic include/config/auto.conf
  357. $(Q)$(MAKE) $(build)=$(@)
  358. # Objects we will link into vmlinux / subdirs we need to visit
  359. init-y := init/
  360. drivers-y := drivers/ sound/
  361. net-y := net/
  362. libs-y := lib/
  363. core-y := usr/
  364. endif # KBUILD_EXTMOD
  365. ifeq ($(dot-config),1)
  366. # Read in config
  367. -include include/config/auto.conf
  368. ifeq ($(KBUILD_EXTMOD),)
  369. # Read in dependencies to all Kconfig* files, make sure to run
  370. # oldconfig if changes are detected.
  371. -include include/config/auto.conf.cmd
  372. # To avoid any implicit rule to kick in, define an empty command
  373. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  374. # If .config is newer than include/config/auto.conf, someone tinkered
  375. # with it and forgot to run make oldconfig.
  376. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  377. # we execute the config step to be sure to catch updated Kconfig files
  378. include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  379. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  380. else
  381. # external modules needs include/linux/autoconf.h and include/config/auto.conf
  382. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  383. PHONY += include/config/auto.conf
  384. include/config/auto.conf:
  385. $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
  386. echo; \
  387. echo " ERROR: Kernel configuration is invalid."; \
  388. echo " include/linux/autoconf.h or $@ are missing."; \
  389. echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  390. echo; \
  391. /bin/false)
  392. endif # KBUILD_EXTMOD
  393. else
  394. # Dummy target needed, because used as prerequisite
  395. include/config/auto.conf: ;
  396. endif # $(dot-config)
  397. # The all: target is the default when no target is given on the
  398. # command line.
  399. # This allow a user to issue only 'make' to build a kernel including modules
  400. # Defaults vmlinux but it is usually overridden in the arch makefile
  401. all: vmlinux
  402. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  403. CFLAGS += -Os
  404. else
  405. CFLAGS += -O2
  406. endif
  407. include $(srctree)/arch/$(ARCH)/Makefile
  408. ifdef CONFIG_FRAME_POINTER
  409. CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  410. else
  411. CFLAGS += -fomit-frame-pointer
  412. endif
  413. ifdef CONFIG_DEBUG_INFO
  414. CFLAGS += -g
  415. AFLAGS += -gdwarf-2
  416. endif
  417. # Force gcc to behave correct even for buggy distributions
  418. CFLAGS += $(call cc-option, -fno-stack-protector)
  419. # arch Makefile may override CC so keep this after arch Makefile is included
  420. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  421. CHECKFLAGS += $(NOSTDINC_FLAGS)
  422. # warn about C99 declaration after statement
  423. CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  424. # disable pointer signed / unsigned warnings in gcc 4.0
  425. CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  426. # Use --build-id when available.
  427. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  428. $(call ld-option, -Wl$(comma)--build-id,))
  429. LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  430. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  431. # Default kernel image to build when no specific target is given.
  432. # KBUILD_IMAGE may be overruled on the command line or
  433. # set in the environment
  434. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  435. # this default value
  436. export KBUILD_IMAGE ?= vmlinux
  437. #
  438. # INSTALL_PATH specifies where to place the updated kernel and system map
  439. # images. Default is /boot, but you can set it to other values
  440. export INSTALL_PATH ?= /boot
  441. #
  442. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  443. # relocations required by build roots. This is not defined in the
  444. # makefile but the argument can be passed to make if needed.
  445. #
  446. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  447. export MODLIB
  448. #
  449. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  450. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  451. # the default option --strip-debug will be used. Otherwise,
  452. # INSTALL_MOD_STRIP will used as the options to the strip command.
  453. ifdef INSTALL_MOD_STRIP
  454. ifeq ($(INSTALL_MOD_STRIP),1)
  455. mod_strip_cmd = $(STRIP) --strip-debug
  456. else
  457. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  458. endif # INSTALL_MOD_STRIP=1
  459. else
  460. mod_strip_cmd = true
  461. endif # INSTALL_MOD_STRIP
  462. export mod_strip_cmd
  463. ifeq ($(KBUILD_EXTMOD),)
  464. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  465. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  466. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  467. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  468. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  469. $(init-n) $(init-) \
  470. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  471. $(net-n) $(net-) $(libs-n) $(libs-))))
  472. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  473. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  474. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  475. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  476. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  477. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  478. libs-y := $(libs-y1) $(libs-y2)
  479. # Build vmlinux
  480. # ---------------------------------------------------------------------------
  481. # vmlinux is built from the objects selected by $(vmlinux-init) and
  482. # $(vmlinux-main). Most are built-in.o files from top-level directories
  483. # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  484. # Ordering when linking is important, and $(vmlinux-init) must be first.
  485. #
  486. # vmlinux
  487. # ^
  488. # |
  489. # +-< $(vmlinux-init)
  490. # | +--< init/version.o + more
  491. # |
  492. # +--< $(vmlinux-main)
  493. # | +--< driver/built-in.o mm/built-in.o + more
  494. # |
  495. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  496. #
  497. # vmlinux version (uname -v) cannot be updated during normal
  498. # descending-into-subdirs phase since we do not yet know if we need to
  499. # update vmlinux.
  500. # Therefore this step is delayed until just before final link of vmlinux -
  501. # except in the kallsyms case where it is done just before adding the
  502. # symbols to the kernel.
  503. #
  504. # System.map is generated to document addresses of all kernel symbols
  505. vmlinux-init := $(head-y) $(init-y)
  506. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  507. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  508. vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
  509. export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
  510. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  511. # May be overridden by arch/$(ARCH)/Makefile
  512. quiet_cmd_vmlinux__ ?= LD $@
  513. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  514. -T $(vmlinux-lds) $(vmlinux-init) \
  515. --start-group $(vmlinux-main) --end-group \
  516. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
  517. # Generate new vmlinux version
  518. quiet_cmd_vmlinux_version = GEN .version
  519. cmd_vmlinux_version = set -e; \
  520. if [ ! -r .version ]; then \
  521. rm -f .version; \
  522. echo 1 >.version; \
  523. else \
  524. mv .version .old_version; \
  525. expr 0$$(cat .old_version) + 1 >.version; \
  526. fi; \
  527. $(MAKE) $(build)=init
  528. # Generate System.map
  529. quiet_cmd_sysmap = SYSMAP
  530. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  531. # Link of vmlinux
  532. # If CONFIG_KALLSYMS is set .version is already updated
  533. # Generate System.map and verify that the content is consistent
  534. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  535. # First command is ':' to allow us to use + in front of the rule
  536. define rule_vmlinux__
  537. :
  538. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  539. $(call cmd,vmlinux__)
  540. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  541. $(Q)$(if $($(quiet)cmd_sysmap), \
  542. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  543. $(cmd_sysmap) $@ System.map; \
  544. if [ $$? -ne 0 ]; then \
  545. rm -f $@; \
  546. /bin/false; \
  547. fi;
  548. $(verify_kallsyms)
  549. endef
  550. ifdef CONFIG_KALLSYMS
  551. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  552. # It's a three stage process:
  553. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  554. # empty
  555. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  556. # the right size - vmlinux version (uname -v) is updated during this step
  557. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  558. # but due to the added section, some addresses have shifted.
  559. # From here, we generate a correct .tmp_kallsyms2.o
  560. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  561. # o Verify that the System.map from vmlinux matches the map from
  562. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  563. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  564. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  565. # temporary bypass to allow the kernel to be built while the
  566. # maintainers work out what went wrong with kallsyms.
  567. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  568. last_kallsyms := 3
  569. else
  570. last_kallsyms := 2
  571. endif
  572. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  573. define verify_kallsyms
  574. $(Q)$(if $($(quiet)cmd_sysmap), \
  575. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  576. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  577. $(Q)cmp -s System.map .tmp_System.map || \
  578. (echo Inconsistent kallsyms data; \
  579. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  580. rm .tmp_kallsyms* ; /bin/false )
  581. endef
  582. # Update vmlinux version before link
  583. # Use + in front of this rule to silent warning about make -j1
  584. # First command is ':' to allow us to use + in front of this rule
  585. cmd_ksym_ld = $(cmd_vmlinux__)
  586. define rule_ksym_ld
  587. :
  588. +$(call cmd,vmlinux_version)
  589. $(call cmd,vmlinux__)
  590. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  591. endef
  592. # Generate .S file with all kernel symbols
  593. quiet_cmd_kallsyms = KSYM $@
  594. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  595. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  596. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  597. $(call if_changed_dep,as_o_S)
  598. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  599. $(call cmd,kallsyms)
  600. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  601. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  602. $(call if_changed_rule,ksym_ld)
  603. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  604. $(call if_changed,vmlinux__)
  605. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  606. $(call if_changed,vmlinux__)
  607. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  608. $(KALLSYMS): scripts ;
  609. # Generate some data for debugging strange kallsyms problems
  610. debug_kallsyms: .tmp_map$(last_kallsyms)
  611. .tmp_map%: .tmp_vmlinux% FORCE
  612. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  613. .tmp_map3: .tmp_map2
  614. .tmp_map2: .tmp_map1
  615. endif # ifdef CONFIG_KALLSYMS
  616. # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
  617. # relevant sections renamed as per the linker script.
  618. quiet_cmd_vmlinux-modpost = LD $@
  619. cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
  620. $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
  621. $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
  622. define rule_vmlinux-modpost
  623. :
  624. +$(call cmd,vmlinux-modpost)
  625. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  626. $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
  627. endef
  628. # vmlinux image - including updated kernel symbols
  629. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
  630. ifdef CONFIG_HEADERS_CHECK
  631. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  632. endif
  633. $(call vmlinux-modpost)
  634. $(call if_changed_rule,vmlinux__)
  635. $(Q)rm -f .old_version
  636. vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
  637. $(call if_changed_rule,vmlinux-modpost)
  638. # The actual objects are generated when descending,
  639. # make sure no implicit rule kicks in
  640. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  641. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  642. # Preset locale variables to speed up the build process. Limit locale
  643. # tweaks to this spot to avoid wrong language settings when running
  644. # make menuconfig etc.
  645. # Error messages still appears in the original language
  646. PHONY += $(vmlinux-dirs)
  647. $(vmlinux-dirs): prepare scripts
  648. $(Q)$(MAKE) $(build)=$@
  649. # Build the kernel release string
  650. #
  651. # The KERNELRELEASE value built here is stored in the file
  652. # include/config/kernel.release, and is used when executing several
  653. # make targets, such as "make install" or "make modules_install."
  654. #
  655. # The eventual kernel release string consists of the following fields,
  656. # shown in a hierarchical format to show how smaller parts are concatenated
  657. # to form the larger and final value, with values coming from places like
  658. # the Makefile, kernel config options, make command line options and/or
  659. # SCM tag information.
  660. #
  661. # $(KERNELVERSION)
  662. # $(VERSION) eg, 2
  663. # $(PATCHLEVEL) eg, 6
  664. # $(SUBLEVEL) eg, 18
  665. # $(EXTRAVERSION) eg, -rc6
  666. # $(localver-full)
  667. # $(localver)
  668. # localversion* (files without backups, containing '~')
  669. # $(CONFIG_LOCALVERSION) (from kernel config setting)
  670. # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
  671. # ./scripts/setlocalversion (SCM tag, if one exists)
  672. # $(LOCALVERSION) (from make command line if provided)
  673. #
  674. # Note how the final $(localver-auto) string is included *only* if the
  675. # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
  676. # moment, only git is supported but other SCMs can edit the script
  677. # scripts/setlocalversion and add the appropriate checks as needed.
  678. pattern = ".*/localversion[^~]*"
  679. string = $(shell cat /dev/null \
  680. `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
  681. localver = $(subst $(space),, $(string) \
  682. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  683. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  684. # and if the SCM is know a tag from the SCM is appended.
  685. # The appended tag is determined by the SCM used.
  686. #
  687. # Currently, only git is supported.
  688. # Other SCMs can edit scripts/setlocalversion and add the appropriate
  689. # checks as needed.
  690. ifdef CONFIG_LOCALVERSION_AUTO
  691. _localver-auto = $(shell $(CONFIG_SHELL) \
  692. $(srctree)/scripts/setlocalversion $(srctree))
  693. localver-auto = $(LOCALVERSION)$(_localver-auto)
  694. endif
  695. localver-full = $(localver)$(localver-auto)
  696. # Store (new) KERNELRELASE string in include/config/kernel.release
  697. kernelrelease = $(KERNELVERSION)$(localver-full)
  698. include/config/kernel.release: include/config/auto.conf FORCE
  699. $(Q)rm -f $@
  700. $(Q)echo $(kernelrelease) > $@
  701. # Things we need to do before we recursively start building the kernel
  702. # or the modules are listed in "prepare".
  703. # A multi level approach is used. prepareN is processed before prepareN-1.
  704. # archprepare is used in arch Makefiles and when processed asm symlink,
  705. # version.h and scripts_basic is processed / created.
  706. # Listed in dependency order
  707. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  708. # prepare3 is used to check if we are building in a separate output directory,
  709. # and if so do:
  710. # 1) Check that make has not been executed in the kernel src $(srctree)
  711. # 2) Create the include2 directory, used for the second asm symlink
  712. prepare3: include/config/kernel.release
  713. ifneq ($(KBUILD_SRC),)
  714. @echo ' Using $(srctree) as source for kernel'
  715. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  716. echo " $(srctree) is not clean, please run 'make mrproper'";\
  717. echo " in the '$(srctree)' directory.";\
  718. /bin/false; \
  719. fi;
  720. $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
  721. $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
  722. endif
  723. # prepare2 creates a makefile if using a separate output directory
  724. prepare2: prepare3 outputmakefile
  725. prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
  726. include/asm include/config/auto.conf
  727. ifneq ($(KBUILD_MODULES),)
  728. $(Q)mkdir -p $(MODVERDIR)
  729. $(Q)rm -f $(MODVERDIR)/*
  730. endif
  731. archprepare: prepare1 scripts_basic
  732. prepare0: archprepare FORCE
  733. $(Q)$(MAKE) $(build)=.
  734. $(Q)$(MAKE) $(build)=. missing-syscalls
  735. # All the preparing..
  736. prepare: prepare0
  737. # Leave this as default for preprocessing vmlinux.lds.S, which is now
  738. # done in arch/$(ARCH)/kernel/Makefile
  739. export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
  740. # FIXME: The asm symlink changes when $(ARCH) changes. That's
  741. # hard to detect, but I suppose "make mrproper" is a good idea
  742. # before switching between archs anyway.
  743. include/asm:
  744. @echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'
  745. $(Q)if [ ! -d include ]; then mkdir -p include; fi;
  746. @ln -fsn asm-$(SRCARCH) $@
  747. # Generate some files
  748. # ---------------------------------------------------------------------------
  749. # KERNELRELEASE can change from a few different places, meaning version.h
  750. # needs to be updated, so this check is forced on all builds
  751. uts_len := 64
  752. define filechk_utsrelease.h
  753. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  754. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  755. exit 1; \
  756. fi; \
  757. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  758. endef
  759. define filechk_version.h
  760. (echo \#define LINUX_VERSION_CODE $(shell \
  761. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  762. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  763. endef
  764. include/linux/version.h: $(srctree)/Makefile FORCE
  765. $(call filechk,version.h)
  766. include/linux/utsrelease.h: include/config/kernel.release FORCE
  767. $(call filechk,utsrelease.h)
  768. # ---------------------------------------------------------------------------
  769. PHONY += depend dep
  770. depend dep:
  771. @echo '*** Warning: make $@ is unnecessary now.'
  772. # ---------------------------------------------------------------------------
  773. # Kernel headers
  774. INSTALL_HDR_PATH=$(objtree)/usr
  775. export INSTALL_HDR_PATH
  776. HDRFILTER=generic i386 x86_64
  777. HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
  778. PHONY += headers_install_all
  779. headers_install_all: include/linux/version.h scripts_basic FORCE
  780. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  781. $(Q)for arch in $(HDRARCHES); do \
  782. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
  783. done
  784. PHONY += headers_install
  785. headers_install: include/linux/version.h scripts_basic FORCE
  786. @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  787. echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
  788. exit 1 ; fi
  789. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  790. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
  791. PHONY += headers_check_all
  792. headers_check_all: headers_install_all
  793. $(Q)for arch in $(HDRARCHES); do \
  794. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
  795. done
  796. PHONY += headers_check
  797. headers_check: headers_install
  798. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
  799. # ---------------------------------------------------------------------------
  800. # Modules
  801. ifdef CONFIG_MODULES
  802. # By default, build modules as well
  803. all: modules
  804. # Build modules
  805. PHONY += modules
  806. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  807. @echo ' Building modules, stage 2.';
  808. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  809. # Target to prepare building external modules
  810. PHONY += modules_prepare
  811. modules_prepare: prepare scripts
  812. # Target to install modules
  813. PHONY += modules_install
  814. modules_install: _modinst_ _modinst_post
  815. PHONY += _modinst_
  816. _modinst_:
  817. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  818. echo "Warning: you may need to install module-init-tools"; \
  819. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  820. sleep 1; \
  821. fi
  822. @rm -rf $(MODLIB)/kernel
  823. @rm -f $(MODLIB)/source
  824. @mkdir -p $(MODLIB)/kernel
  825. @ln -s $(srctree) $(MODLIB)/source
  826. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  827. rm -f $(MODLIB)/build ; \
  828. ln -s $(objtree) $(MODLIB)/build ; \
  829. fi
  830. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  831. # If System.map exists, run depmod. This deliberately does not have a
  832. # dependency on System.map since that would run the dependency tree on
  833. # vmlinux. This depmod is only for convenience to give the initial
  834. # boot a modules.dep even before / is mounted read-write. However the
  835. # boot script depmod is the master version.
  836. ifeq "$(strip $(INSTALL_MOD_PATH))" ""
  837. depmod_opts :=
  838. else
  839. depmod_opts := -b $(INSTALL_MOD_PATH) -r
  840. endif
  841. PHONY += _modinst_post
  842. _modinst_post: _modinst_
  843. if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
  844. else # CONFIG_MODULES
  845. # Modules not configured
  846. # ---------------------------------------------------------------------------
  847. modules modules_install: FORCE
  848. @echo
  849. @echo "The present kernel configuration has modules disabled."
  850. @echo "Type 'make config' and enable loadable module support."
  851. @echo "Then build a kernel with module support enabled."
  852. @echo
  853. @exit 1
  854. endif # CONFIG_MODULES
  855. ###
  856. # Cleaning is done on three levels.
  857. # make clean Delete most generated files
  858. # Leave enough to build external modules
  859. # make mrproper Delete the current configuration, and all generated files
  860. # make distclean Remove editor backup files, patch leftover files and the like
  861. # Directories & files removed with 'make clean'
  862. CLEAN_DIRS += $(MODVERDIR)
  863. CLEAN_FILES += vmlinux System.map \
  864. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  865. # Directories & files removed with 'make mrproper'
  866. MRPROPER_DIRS += include/config include2 usr/include
  867. MRPROPER_FILES += .config .config.old include/asm .version .old_version \
  868. include/linux/autoconf.h include/linux/version.h \
  869. include/linux/utsrelease.h \
  870. Module.symvers tags TAGS cscope*
  871. # clean - Delete most, but leave enough to build external modules
  872. #
  873. clean: rm-dirs := $(CLEAN_DIRS)
  874. clean: rm-files := $(CLEAN_FILES)
  875. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
  876. PHONY += $(clean-dirs) clean archclean
  877. $(clean-dirs):
  878. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  879. clean: archclean $(clean-dirs)
  880. $(call cmd,rmdirs)
  881. $(call cmd,rmfiles)
  882. @find . $(RCS_FIND_IGNORE) \
  883. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  884. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  885. -o -name '*.symtypes' \) \
  886. -type f -print | xargs rm -f
  887. # mrproper - Delete all generated files, including .config
  888. #
  889. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  890. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  891. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  892. PHONY += $(mrproper-dirs) mrproper archmrproper
  893. $(mrproper-dirs):
  894. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  895. mrproper: clean archmrproper $(mrproper-dirs)
  896. $(call cmd,rmdirs)
  897. $(call cmd,rmfiles)
  898. # distclean
  899. #
  900. PHONY += distclean
  901. distclean: mrproper
  902. @find $(srctree) $(RCS_FIND_IGNORE) \
  903. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  904. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  905. -o -name '.*.rej' -o -size 0 \
  906. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  907. -type f -print | xargs rm -f
  908. # Packaging of the kernel to various formats
  909. # ---------------------------------------------------------------------------
  910. # rpm target kept for backward compatibility
  911. package-dir := $(srctree)/scripts/package
  912. %pkg: include/config/kernel.release FORCE
  913. $(Q)$(MAKE) $(build)=$(package-dir) $@
  914. rpm: include/config/kernel.release FORCE
  915. $(Q)$(MAKE) $(build)=$(package-dir) $@
  916. # Brief documentation of the typical targets used
  917. # ---------------------------------------------------------------------------
  918. boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
  919. boards := $(notdir $(boards))
  920. help:
  921. @echo 'Cleaning targets:'
  922. @echo ' clean - Remove most generated files but keep the config and'
  923. @echo ' enough build support to build external modules'
  924. @echo ' mrproper - Remove all generated files + config + various backup files'
  925. @echo ' distclean - mrproper + remove editor backup and patch files'
  926. @echo ''
  927. @echo 'Configuration targets:'
  928. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  929. @echo ''
  930. @echo 'Other generic targets:'
  931. @echo ' all - Build all targets marked with [*]'
  932. @echo '* vmlinux - Build the bare kernel'
  933. @echo '* modules - Build all modules'
  934. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  935. @echo ' dir/ - Build all files in dir and below'
  936. @echo ' dir/file.[ois] - Build specified target only'
  937. @echo ' dir/file.ko - Build module including final link'
  938. @echo ' rpm - Build a kernel as an RPM package'
  939. @echo ' tags/TAGS - Generate tags file for editors'
  940. @echo ' cscope - Generate cscope index'
  941. @echo ' kernelrelease - Output the release version string'
  942. @echo ' kernelversion - Output the version stored in Makefile'
  943. @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  944. echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  945. echo ' (default: $(INSTALL_HDR_PATH))'; \
  946. fi
  947. @echo ''
  948. @echo 'Static analysers'
  949. @echo ' checkstack - Generate a list of stack hogs'
  950. @echo ' namespacecheck - Name space analysis on compiled kernel'
  951. @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  952. echo ' headers_check - Sanity check on exported headers'; \
  953. fi
  954. @echo ''
  955. @echo 'Kernel packaging:'
  956. @$(MAKE) $(build)=$(package-dir) help
  957. @echo ''
  958. @echo 'Documentation targets:'
  959. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  960. @echo ''
  961. @echo 'Architecture specific targets ($(ARCH)):'
  962. @$(if $(archhelp),$(archhelp),\
  963. echo ' No architecture specific help defined for $(ARCH)')
  964. @echo ''
  965. @$(if $(boards), \
  966. $(foreach b, $(boards), \
  967. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  968. echo '')
  969. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  970. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  971. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  972. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  973. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  974. @echo ''
  975. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  976. @echo 'For further info see the ./README file'
  977. # Documentation targets
  978. # ---------------------------------------------------------------------------
  979. %docs: scripts_basic FORCE
  980. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  981. else # KBUILD_EXTMOD
  982. ###
  983. # External module support.
  984. # When building external modules the kernel used as basis is considered
  985. # read-only, and no consistency checks are made and the make
  986. # system is not used on the basis kernel. If updates are required
  987. # in the basis kernel ordinary make commands (without M=...) must
  988. # be used.
  989. #
  990. # The following are the only valid targets when building external
  991. # modules.
  992. # make M=dir clean Delete all automatically generated files
  993. # make M=dir modules Make all modules in specified dir
  994. # make M=dir Same as 'make M=dir modules'
  995. # make M=dir modules_install
  996. # Install the modules built in the module directory
  997. # Assumes install directory is already created
  998. # We are always building modules
  999. KBUILD_MODULES := 1
  1000. PHONY += crmodverdir
  1001. crmodverdir:
  1002. $(Q)mkdir -p $(MODVERDIR)
  1003. $(Q)rm -f $(MODVERDIR)/*
  1004. PHONY += $(objtree)/Module.symvers
  1005. $(objtree)/Module.symvers:
  1006. @test -e $(objtree)/Module.symvers || ( \
  1007. echo; \
  1008. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1009. echo " is missing; modules will have no dependencies and modversions."; \
  1010. echo )
  1011. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1012. PHONY += $(module-dirs) modules
  1013. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1014. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1015. modules: $(module-dirs)
  1016. @echo ' Building modules, stage 2.';
  1017. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1018. PHONY += modules_install
  1019. modules_install: _emodinst_ _emodinst_post
  1020. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1021. PHONY += _emodinst_
  1022. _emodinst_:
  1023. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1024. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1025. # Run depmod only is we have System.map and depmod is executable
  1026. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1027. cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
  1028. $(DEPMOD) -ae -F System.map \
  1029. $(if $(strip $(INSTALL_MOD_PATH)), \
  1030. -b $(INSTALL_MOD_PATH) -r) \
  1031. $(KERNELRELEASE); \
  1032. fi
  1033. PHONY += _emodinst_post
  1034. _emodinst_post: _emodinst_
  1035. $(call cmd,depmod)
  1036. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1037. PHONY += $(clean-dirs) clean
  1038. $(clean-dirs):
  1039. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1040. clean: rm-dirs := $(MODVERDIR)
  1041. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1042. clean: $(clean-dirs)
  1043. $(call cmd,rmdirs)
  1044. $(call cmd,rmfiles)
  1045. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  1046. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1047. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  1048. -type f -print | xargs rm -f
  1049. help:
  1050. @echo ' Building external modules.'
  1051. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1052. @echo ''
  1053. @echo ' modules - default target, build the module(s)'
  1054. @echo ' modules_install - install the module'
  1055. @echo ' clean - remove generated files in module directory only'
  1056. @echo ''
  1057. # Dummies...
  1058. PHONY += prepare scripts
  1059. prepare: ;
  1060. scripts: ;
  1061. endif # KBUILD_EXTMOD
  1062. # Generate tags for editors
  1063. # ---------------------------------------------------------------------------
  1064. #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
  1065. #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
  1066. #Adding $(srctree) adds about 20M on i386 to the size of the output file!
  1067. ifeq ($(src),$(obj))
  1068. __srctree =
  1069. else
  1070. __srctree = $(srctree)/
  1071. endif
  1072. ifeq ($(ALLSOURCE_ARCHS),)
  1073. ifeq ($(ARCH),um)
  1074. ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
  1075. else
  1076. ALLINCLUDE_ARCHS := $(SRCARCH)
  1077. endif
  1078. else
  1079. #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
  1080. ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
  1081. endif
  1082. # Take care of arch/x86
  1083. ifeq ($(ARCH), $(SRCARCH))
  1084. ALLSOURCE_ARCHS := $(ARCH)
  1085. else
  1086. ALLSOURCE_ARCHS := $(ARCH) $(SRCARCH)
  1087. endif
  1088. define find-sources
  1089. ( for ARCH in $(ALLSOURCE_ARCHS) ; do \
  1090. find $(__srctree)arch/$${SRCARCH} $(RCS_FIND_IGNORE) \
  1091. -name $1 -print; \
  1092. done ; \
  1093. find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
  1094. -name $1 -print; \
  1095. find $(__srctree)include $(RCS_FIND_IGNORE) \
  1096. \( -name config -o -name 'asm-*' \) -prune \
  1097. -o -name $1 -print; \
  1098. for ARCH in $(ALLINCLUDE_ARCHS) ; do \
  1099. find $(__srctree)include/asm-$${SRCARCH} $(RCS_FIND_IGNORE) \
  1100. -name $1 -print; \
  1101. done ; \
  1102. find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
  1103. -name $1 -print; \
  1104. find $(__srctree) $(RCS_FIND_IGNORE) \
  1105. \( -name include -o -name arch \) -prune -o \
  1106. -name $1 -print; \
  1107. )
  1108. endef
  1109. define all-sources
  1110. $(call find-sources,'*.[chS]')
  1111. endef
  1112. define all-kconfigs
  1113. $(call find-sources,'Kconfig*')
  1114. endef
  1115. define all-defconfigs
  1116. $(call find-sources,'defconfig')
  1117. endef
  1118. define xtags
  1119. if $1 --version 2>&1 | grep -iq exuberant; then \
  1120. $(all-sources) | xargs $1 -a \
  1121. -I __initdata,__exitdata,__acquires,__releases \
  1122. -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
  1123. --extra=+f --c-kinds=+px \
  1124. --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
  1125. $(all-kconfigs) | xargs $1 -a \
  1126. --langdef=kconfig \
  1127. --language-force=kconfig \
  1128. --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
  1129. $(all-defconfigs) | xargs -r $1 -a \
  1130. --langdef=dotconfig \
  1131. --language-force=dotconfig \
  1132. --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
  1133. elif $1 --version 2>&1 | grep -iq emacs; then \
  1134. $(all-sources) | xargs $1 -a; \
  1135. $(all-kconfigs) | xargs $1 -a \
  1136. --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
  1137. $(all-defconfigs) | xargs -r $1 -a \
  1138. --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
  1139. else \
  1140. $(all-sources) | xargs $1 -a; \
  1141. fi
  1142. endef
  1143. quiet_cmd_cscope-file = FILELST cscope.files
  1144. cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
  1145. quiet_cmd_cscope = MAKE cscope.out
  1146. cmd_cscope = cscope -b
  1147. cscope: FORCE
  1148. $(call cmd,cscope-file)
  1149. $(call cmd,cscope)
  1150. quiet_cmd_TAGS = MAKE $@
  1151. define cmd_TAGS
  1152. rm -f $@; \
  1153. $(call xtags,etags)
  1154. endef
  1155. TAGS: FORCE
  1156. $(call cmd,TAGS)
  1157. quiet_cmd_tags = MAKE $@
  1158. define cmd_tags
  1159. rm -f $@; \
  1160. $(call xtags,ctags)
  1161. endef
  1162. tags: FORCE
  1163. $(call cmd,tags)
  1164. # Scripts to check various things for consistency
  1165. # ---------------------------------------------------------------------------
  1166. includecheck:
  1167. find * $(RCS_FIND_IGNORE) \
  1168. -name '*.[hcS]' -type f -print | sort \
  1169. | xargs $(PERL) -w scripts/checkincludes.pl
  1170. versioncheck:
  1171. find * $(RCS_FIND_IGNORE) \
  1172. -name '*.[hcS]' -type f -print | sort \
  1173. | xargs $(PERL) -w scripts/checkversion.pl
  1174. namespacecheck:
  1175. $(PERL) $(srctree)/scripts/namespace.pl
  1176. endif #ifeq ($(config-targets),1)
  1177. endif #ifeq ($(mixed-targets),1)
  1178. PHONY += checkstack kernelrelease kernelversion
  1179. # UML needs a little special treatment here. It wants to use the host
  1180. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1181. # else wants $(ARCH), including people doing cross-builds, which means
  1182. # that $(SUBARCH) doesn't work here.
  1183. ifeq ($(ARCH), um)
  1184. CHECKSTACK_ARCH := $(SUBARCH)
  1185. else
  1186. CHECKSTACK_ARCH := $(ARCH)
  1187. endif
  1188. checkstack:
  1189. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1190. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1191. kernelrelease:
  1192. $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  1193. $(error kernelrelease not valid - run 'make prepare' to update it))
  1194. kernelversion:
  1195. @echo $(KERNELVERSION)
  1196. # Single targets
  1197. # ---------------------------------------------------------------------------
  1198. # Single targets are compatible with:
  1199. # - build whith mixed source and output
  1200. # - build with separate output dir 'make O=...'
  1201. # - external modules
  1202. #
  1203. # target-dir => where to store outputfile
  1204. # build-dir => directory in kernel source tree to use
  1205. ifeq ($(KBUILD_EXTMOD),)
  1206. build-dir = $(patsubst %/,%,$(dir $@))
  1207. target-dir = $(dir $@)
  1208. else
  1209. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1210. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1211. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1212. endif
  1213. %.s: %.c prepare scripts FORCE
  1214. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1215. %.i: %.c prepare scripts FORCE
  1216. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1217. %.o: %.c prepare scripts FORCE
  1218. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1219. %.lst: %.c prepare scripts FORCE
  1220. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1221. %.s: %.S prepare scripts FORCE
  1222. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1223. %.o: %.S prepare scripts FORCE
  1224. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1225. %.symtypes: %.c prepare scripts FORCE
  1226. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1227. # Modules
  1228. / %/: prepare scripts FORCE
  1229. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1230. $(build)=$(build-dir)
  1231. %.ko: prepare scripts FORCE
  1232. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1233. $(build)=$(build-dir) $(@:.ko=.o)
  1234. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1235. # FIXME Should go into a make.lib or something
  1236. # ===========================================================================
  1237. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1238. cmd_rmdirs = rm -rf $(rm-dirs)
  1239. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1240. cmd_rmfiles = rm -f $(rm-files)
  1241. a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
  1242. $(NOSTDINC_FLAGS) $(CPPFLAGS) \
  1243. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1244. quiet_cmd_as_o_S = AS $@
  1245. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1246. # read all saved command lines
  1247. targets := $(wildcard $(sort $(targets)))
  1248. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1249. ifneq ($(cmd_files),)
  1250. $(cmd_files): ; # Do not try to update included dependency files
  1251. include $(cmd_files)
  1252. endif
  1253. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1254. # Usage:
  1255. # $(Q)$(MAKE) $(clean)=dir
  1256. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1257. endif # skip-makefile
  1258. PHONY += FORCE
  1259. FORCE:
  1260. # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
  1261. Makefile: ;
  1262. # Declare the contents of the .PHONY variable as phony. We keep that
  1263. # information in a variable se we can use it in if_changed and friends.
  1264. .PHONY: $(PHONY)