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. endif
  416. # Force gcc to behave correct even for buggy distributions
  417. CFLAGS += $(call cc-option, -fno-stack-protector)
  418. # arch Makefile may override CC so keep this after arch Makefile is included
  419. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  420. CHECKFLAGS += $(NOSTDINC_FLAGS)
  421. # warn about C99 declaration after statement
  422. CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  423. # disable pointer signed / unsigned warnings in gcc 4.0
  424. CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  425. # Use --build-id when available.
  426. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  427. $(call ld-option, -Wl$(comma)--build-id,))
  428. LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  429. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  430. # Default kernel image to build when no specific target is given.
  431. # KBUILD_IMAGE may be overruled on the command line or
  432. # set in the environment
  433. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  434. # this default value
  435. export KBUILD_IMAGE ?= vmlinux
  436. #
  437. # INSTALL_PATH specifies where to place the updated kernel and system map
  438. # images. Default is /boot, but you can set it to other values
  439. export INSTALL_PATH ?= /boot
  440. #
  441. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  442. # relocations required by build roots. This is not defined in the
  443. # makefile but the argument can be passed to make if needed.
  444. #
  445. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  446. export MODLIB
  447. #
  448. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  449. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  450. # the default option --strip-debug will be used. Otherwise,
  451. # INSTALL_MOD_STRIP will used as the options to the strip command.
  452. ifdef INSTALL_MOD_STRIP
  453. ifeq ($(INSTALL_MOD_STRIP),1)
  454. mod_strip_cmd = $(STRIP) --strip-debug
  455. else
  456. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  457. endif # INSTALL_MOD_STRIP=1
  458. else
  459. mod_strip_cmd = true
  460. endif # INSTALL_MOD_STRIP
  461. export mod_strip_cmd
  462. ifeq ($(KBUILD_EXTMOD),)
  463. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  464. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  465. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  466. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  467. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  468. $(init-n) $(init-) \
  469. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  470. $(net-n) $(net-) $(libs-n) $(libs-))))
  471. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  472. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  473. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  474. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  475. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  476. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  477. libs-y := $(libs-y1) $(libs-y2)
  478. # Build vmlinux
  479. # ---------------------------------------------------------------------------
  480. # vmlinux is built from the objects selected by $(vmlinux-init) and
  481. # $(vmlinux-main). Most are built-in.o files from top-level directories
  482. # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  483. # Ordering when linking is important, and $(vmlinux-init) must be first.
  484. #
  485. # vmlinux
  486. # ^
  487. # |
  488. # +-< $(vmlinux-init)
  489. # | +--< init/version.o + more
  490. # |
  491. # +--< $(vmlinux-main)
  492. # | +--< driver/built-in.o mm/built-in.o + more
  493. # |
  494. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  495. #
  496. # vmlinux version (uname -v) cannot be updated during normal
  497. # descending-into-subdirs phase since we do not yet know if we need to
  498. # update vmlinux.
  499. # Therefore this step is delayed until just before final link of vmlinux -
  500. # except in the kallsyms case where it is done just before adding the
  501. # symbols to the kernel.
  502. #
  503. # System.map is generated to document addresses of all kernel symbols
  504. vmlinux-init := $(head-y) $(init-y)
  505. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  506. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  507. vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
  508. export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
  509. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  510. # May be overridden by arch/$(ARCH)/Makefile
  511. quiet_cmd_vmlinux__ ?= LD $@
  512. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  513. -T $(vmlinux-lds) $(vmlinux-init) \
  514. --start-group $(vmlinux-main) --end-group \
  515. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
  516. # Generate new vmlinux version
  517. quiet_cmd_vmlinux_version = GEN .version
  518. cmd_vmlinux_version = set -e; \
  519. if [ ! -r .version ]; then \
  520. rm -f .version; \
  521. echo 1 >.version; \
  522. else \
  523. mv .version .old_version; \
  524. expr 0$$(cat .old_version) + 1 >.version; \
  525. fi; \
  526. $(MAKE) $(build)=init
  527. # Generate System.map
  528. quiet_cmd_sysmap = SYSMAP
  529. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  530. # Link of vmlinux
  531. # If CONFIG_KALLSYMS is set .version is already updated
  532. # Generate System.map and verify that the content is consistent
  533. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  534. # First command is ':' to allow us to use + in front of the rule
  535. define rule_vmlinux__
  536. :
  537. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  538. $(call cmd,vmlinux__)
  539. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  540. $(Q)$(if $($(quiet)cmd_sysmap), \
  541. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  542. $(cmd_sysmap) $@ System.map; \
  543. if [ $$? -ne 0 ]; then \
  544. rm -f $@; \
  545. /bin/false; \
  546. fi;
  547. $(verify_kallsyms)
  548. endef
  549. ifdef CONFIG_KALLSYMS
  550. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  551. # It's a three stage process:
  552. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  553. # empty
  554. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  555. # the right size - vmlinux version (uname -v) is updated during this step
  556. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  557. # but due to the added section, some addresses have shifted.
  558. # From here, we generate a correct .tmp_kallsyms2.o
  559. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  560. # o Verify that the System.map from vmlinux matches the map from
  561. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  562. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  563. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  564. # temporary bypass to allow the kernel to be built while the
  565. # maintainers work out what went wrong with kallsyms.
  566. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  567. last_kallsyms := 3
  568. else
  569. last_kallsyms := 2
  570. endif
  571. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  572. define verify_kallsyms
  573. $(Q)$(if $($(quiet)cmd_sysmap), \
  574. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  575. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  576. $(Q)cmp -s System.map .tmp_System.map || \
  577. (echo Inconsistent kallsyms data; \
  578. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  579. rm .tmp_kallsyms* ; /bin/false )
  580. endef
  581. # Update vmlinux version before link
  582. # Use + in front of this rule to silent warning about make -j1
  583. # First command is ':' to allow us to use + in front of this rule
  584. cmd_ksym_ld = $(cmd_vmlinux__)
  585. define rule_ksym_ld
  586. :
  587. +$(call cmd,vmlinux_version)
  588. $(call cmd,vmlinux__)
  589. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  590. endef
  591. # Generate .S file with all kernel symbols
  592. quiet_cmd_kallsyms = KSYM $@
  593. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  594. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  595. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  596. $(call if_changed_dep,as_o_S)
  597. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  598. $(call cmd,kallsyms)
  599. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  600. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  601. $(call if_changed_rule,ksym_ld)
  602. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  603. $(call if_changed,vmlinux__)
  604. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  605. $(call if_changed,vmlinux__)
  606. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  607. $(KALLSYMS): scripts ;
  608. # Generate some data for debugging strange kallsyms problems
  609. debug_kallsyms: .tmp_map$(last_kallsyms)
  610. .tmp_map%: .tmp_vmlinux% FORCE
  611. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  612. .tmp_map3: .tmp_map2
  613. .tmp_map2: .tmp_map1
  614. endif # ifdef CONFIG_KALLSYMS
  615. # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
  616. # relevant sections renamed as per the linker script.
  617. quiet_cmd_vmlinux-modpost = LD $@
  618. cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
  619. $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
  620. $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
  621. define rule_vmlinux-modpost
  622. :
  623. +$(call cmd,vmlinux-modpost)
  624. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  625. $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
  626. endef
  627. # vmlinux image - including updated kernel symbols
  628. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
  629. ifdef CONFIG_HEADERS_CHECK
  630. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  631. endif
  632. $(call vmlinux-modpost)
  633. $(call if_changed_rule,vmlinux__)
  634. $(Q)rm -f .old_version
  635. vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
  636. $(call if_changed_rule,vmlinux-modpost)
  637. # The actual objects are generated when descending,
  638. # make sure no implicit rule kicks in
  639. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  640. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  641. # Preset locale variables to speed up the build process. Limit locale
  642. # tweaks to this spot to avoid wrong language settings when running
  643. # make menuconfig etc.
  644. # Error messages still appears in the original language
  645. PHONY += $(vmlinux-dirs)
  646. $(vmlinux-dirs): prepare scripts
  647. $(Q)$(MAKE) $(build)=$@
  648. # Build the kernel release string
  649. #
  650. # The KERNELRELEASE value built here is stored in the file
  651. # include/config/kernel.release, and is used when executing several
  652. # make targets, such as "make install" or "make modules_install."
  653. #
  654. # The eventual kernel release string consists of the following fields,
  655. # shown in a hierarchical format to show how smaller parts are concatenated
  656. # to form the larger and final value, with values coming from places like
  657. # the Makefile, kernel config options, make command line options and/or
  658. # SCM tag information.
  659. #
  660. # $(KERNELVERSION)
  661. # $(VERSION) eg, 2
  662. # $(PATCHLEVEL) eg, 6
  663. # $(SUBLEVEL) eg, 18
  664. # $(EXTRAVERSION) eg, -rc6
  665. # $(localver-full)
  666. # $(localver)
  667. # localversion* (files without backups, containing '~')
  668. # $(CONFIG_LOCALVERSION) (from kernel config setting)
  669. # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
  670. # ./scripts/setlocalversion (SCM tag, if one exists)
  671. # $(LOCALVERSION) (from make command line if provided)
  672. #
  673. # Note how the final $(localver-auto) string is included *only* if the
  674. # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
  675. # moment, only git is supported but other SCMs can edit the script
  676. # scripts/setlocalversion and add the appropriate checks as needed.
  677. pattern = ".*/localversion[^~]*"
  678. string = $(shell cat /dev/null \
  679. `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
  680. localver = $(subst $(space),, $(string) \
  681. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  682. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  683. # and if the SCM is know a tag from the SCM is appended.
  684. # The appended tag is determined by the SCM used.
  685. #
  686. # Currently, only git is supported.
  687. # Other SCMs can edit scripts/setlocalversion and add the appropriate
  688. # checks as needed.
  689. ifdef CONFIG_LOCALVERSION_AUTO
  690. _localver-auto = $(shell $(CONFIG_SHELL) \
  691. $(srctree)/scripts/setlocalversion $(srctree))
  692. localver-auto = $(LOCALVERSION)$(_localver-auto)
  693. endif
  694. localver-full = $(localver)$(localver-auto)
  695. # Store (new) KERNELRELASE string in include/config/kernel.release
  696. kernelrelease = $(KERNELVERSION)$(localver-full)
  697. include/config/kernel.release: include/config/auto.conf FORCE
  698. $(Q)rm -f $@
  699. $(Q)echo $(kernelrelease) > $@
  700. # Things we need to do before we recursively start building the kernel
  701. # or the modules are listed in "prepare".
  702. # A multi level approach is used. prepareN is processed before prepareN-1.
  703. # archprepare is used in arch Makefiles and when processed asm symlink,
  704. # version.h and scripts_basic is processed / created.
  705. # Listed in dependency order
  706. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  707. # prepare3 is used to check if we are building in a separate output directory,
  708. # and if so do:
  709. # 1) Check that make has not been executed in the kernel src $(srctree)
  710. # 2) Create the include2 directory, used for the second asm symlink
  711. prepare3: include/config/kernel.release
  712. ifneq ($(KBUILD_SRC),)
  713. @echo ' Using $(srctree) as source for kernel'
  714. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  715. echo " $(srctree) is not clean, please run 'make mrproper'";\
  716. echo " in the '$(srctree)' directory.";\
  717. /bin/false; \
  718. fi;
  719. $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
  720. $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
  721. endif
  722. # prepare2 creates a makefile if using a separate output directory
  723. prepare2: prepare3 outputmakefile
  724. prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
  725. include/asm include/config/auto.conf
  726. ifneq ($(KBUILD_MODULES),)
  727. $(Q)mkdir -p $(MODVERDIR)
  728. $(Q)rm -f $(MODVERDIR)/*
  729. endif
  730. archprepare: prepare1 scripts_basic
  731. prepare0: archprepare FORCE
  732. $(Q)$(MAKE) $(build)=.
  733. $(Q)$(MAKE) $(build)=. missing-syscalls
  734. # All the preparing..
  735. prepare: prepare0
  736. # Leave this as default for preprocessing vmlinux.lds.S, which is now
  737. # done in arch/$(ARCH)/kernel/Makefile
  738. export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
  739. # FIXME: The asm symlink changes when $(ARCH) changes. That's
  740. # hard to detect, but I suppose "make mrproper" is a good idea
  741. # before switching between archs anyway.
  742. include/asm:
  743. @echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'
  744. $(Q)if [ ! -d include ]; then mkdir -p include; fi;
  745. @ln -fsn asm-$(SRCARCH) $@
  746. # Generate some files
  747. # ---------------------------------------------------------------------------
  748. # KERNELRELEASE can change from a few different places, meaning version.h
  749. # needs to be updated, so this check is forced on all builds
  750. uts_len := 64
  751. define filechk_utsrelease.h
  752. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  753. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  754. exit 1; \
  755. fi; \
  756. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  757. endef
  758. define filechk_version.h
  759. (echo \#define LINUX_VERSION_CODE $(shell \
  760. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  761. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  762. endef
  763. include/linux/version.h: $(srctree)/Makefile FORCE
  764. $(call filechk,version.h)
  765. include/linux/utsrelease.h: include/config/kernel.release FORCE
  766. $(call filechk,utsrelease.h)
  767. # ---------------------------------------------------------------------------
  768. PHONY += depend dep
  769. depend dep:
  770. @echo '*** Warning: make $@ is unnecessary now.'
  771. # ---------------------------------------------------------------------------
  772. # Kernel headers
  773. INSTALL_HDR_PATH=$(objtree)/usr
  774. export INSTALL_HDR_PATH
  775. HDRFILTER=generic i386 x86_64
  776. HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
  777. PHONY += headers_install_all
  778. headers_install_all: include/linux/version.h scripts_basic FORCE
  779. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  780. $(Q)for arch in $(HDRARCHES); do \
  781. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
  782. done
  783. PHONY += headers_install
  784. headers_install: include/linux/version.h scripts_basic FORCE
  785. @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  786. echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
  787. exit 1 ; fi
  788. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  789. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
  790. PHONY += headers_check_all
  791. headers_check_all: headers_install_all
  792. $(Q)for arch in $(HDRARCHES); do \
  793. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
  794. done
  795. PHONY += headers_check
  796. headers_check: headers_install
  797. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
  798. # ---------------------------------------------------------------------------
  799. # Modules
  800. ifdef CONFIG_MODULES
  801. # By default, build modules as well
  802. all: modules
  803. # Build modules
  804. PHONY += modules
  805. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  806. @echo ' Building modules, stage 2.';
  807. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  808. # Target to prepare building external modules
  809. PHONY += modules_prepare
  810. modules_prepare: prepare scripts
  811. # Target to install modules
  812. PHONY += modules_install
  813. modules_install: _modinst_ _modinst_post
  814. PHONY += _modinst_
  815. _modinst_:
  816. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  817. echo "Warning: you may need to install module-init-tools"; \
  818. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  819. sleep 1; \
  820. fi
  821. @rm -rf $(MODLIB)/kernel
  822. @rm -f $(MODLIB)/source
  823. @mkdir -p $(MODLIB)/kernel
  824. @ln -s $(srctree) $(MODLIB)/source
  825. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  826. rm -f $(MODLIB)/build ; \
  827. ln -s $(objtree) $(MODLIB)/build ; \
  828. fi
  829. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  830. # If System.map exists, run depmod. This deliberately does not have a
  831. # dependency on System.map since that would run the dependency tree on
  832. # vmlinux. This depmod is only for convenience to give the initial
  833. # boot a modules.dep even before / is mounted read-write. However the
  834. # boot script depmod is the master version.
  835. ifeq "$(strip $(INSTALL_MOD_PATH))" ""
  836. depmod_opts :=
  837. else
  838. depmod_opts := -b $(INSTALL_MOD_PATH) -r
  839. endif
  840. PHONY += _modinst_post
  841. _modinst_post: _modinst_
  842. if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
  843. else # CONFIG_MODULES
  844. # Modules not configured
  845. # ---------------------------------------------------------------------------
  846. modules modules_install: FORCE
  847. @echo
  848. @echo "The present kernel configuration has modules disabled."
  849. @echo "Type 'make config' and enable loadable module support."
  850. @echo "Then build a kernel with module support enabled."
  851. @echo
  852. @exit 1
  853. endif # CONFIG_MODULES
  854. ###
  855. # Cleaning is done on three levels.
  856. # make clean Delete most generated files
  857. # Leave enough to build external modules
  858. # make mrproper Delete the current configuration, and all generated files
  859. # make distclean Remove editor backup files, patch leftover files and the like
  860. # Directories & files removed with 'make clean'
  861. CLEAN_DIRS += $(MODVERDIR)
  862. CLEAN_FILES += vmlinux System.map \
  863. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  864. # Directories & files removed with 'make mrproper'
  865. MRPROPER_DIRS += include/config include2 usr/include
  866. MRPROPER_FILES += .config .config.old include/asm .version .old_version \
  867. include/linux/autoconf.h include/linux/version.h \
  868. include/linux/utsrelease.h \
  869. Module.symvers tags TAGS cscope*
  870. # clean - Delete most, but leave enough to build external modules
  871. #
  872. clean: rm-dirs := $(CLEAN_DIRS)
  873. clean: rm-files := $(CLEAN_FILES)
  874. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
  875. PHONY += $(clean-dirs) clean archclean
  876. $(clean-dirs):
  877. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  878. clean: archclean $(clean-dirs)
  879. $(call cmd,rmdirs)
  880. $(call cmd,rmfiles)
  881. @find . $(RCS_FIND_IGNORE) \
  882. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  883. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  884. -o -name '*.symtypes' \) \
  885. -type f -print | xargs rm -f
  886. # mrproper - Delete all generated files, including .config
  887. #
  888. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  889. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  890. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  891. PHONY += $(mrproper-dirs) mrproper archmrproper
  892. $(mrproper-dirs):
  893. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  894. mrproper: clean archmrproper $(mrproper-dirs)
  895. $(call cmd,rmdirs)
  896. $(call cmd,rmfiles)
  897. # distclean
  898. #
  899. PHONY += distclean
  900. distclean: mrproper
  901. @find $(srctree) $(RCS_FIND_IGNORE) \
  902. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  903. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  904. -o -name '.*.rej' -o -size 0 \
  905. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  906. -type f -print | xargs rm -f
  907. # Packaging of the kernel to various formats
  908. # ---------------------------------------------------------------------------
  909. # rpm target kept for backward compatibility
  910. package-dir := $(srctree)/scripts/package
  911. %pkg: include/config/kernel.release FORCE
  912. $(Q)$(MAKE) $(build)=$(package-dir) $@
  913. rpm: include/config/kernel.release FORCE
  914. $(Q)$(MAKE) $(build)=$(package-dir) $@
  915. # Brief documentation of the typical targets used
  916. # ---------------------------------------------------------------------------
  917. boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
  918. boards := $(notdir $(boards))
  919. help:
  920. @echo 'Cleaning targets:'
  921. @echo ' clean - Remove most generated files but keep the config and'
  922. @echo ' enough build support to build external modules'
  923. @echo ' mrproper - Remove all generated files + config + various backup files'
  924. @echo ' distclean - mrproper + remove editor backup and patch files'
  925. @echo ''
  926. @echo 'Configuration targets:'
  927. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  928. @echo ''
  929. @echo 'Other generic targets:'
  930. @echo ' all - Build all targets marked with [*]'
  931. @echo '* vmlinux - Build the bare kernel'
  932. @echo '* modules - Build all modules'
  933. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  934. @echo ' dir/ - Build all files in dir and below'
  935. @echo ' dir/file.[ois] - Build specified target only'
  936. @echo ' dir/file.ko - Build module including final link'
  937. @echo ' rpm - Build a kernel as an RPM package'
  938. @echo ' tags/TAGS - Generate tags file for editors'
  939. @echo ' cscope - Generate cscope index'
  940. @echo ' kernelrelease - Output the release version string'
  941. @echo ' kernelversion - Output the version stored in Makefile'
  942. @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  943. echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  944. echo ' (default: $(INSTALL_HDR_PATH))'; \
  945. fi
  946. @echo ''
  947. @echo 'Static analysers'
  948. @echo ' checkstack - Generate a list of stack hogs'
  949. @echo ' namespacecheck - Name space analysis on compiled kernel'
  950. @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  951. echo ' headers_check - Sanity check on exported headers'; \
  952. fi
  953. @echo ''
  954. @echo 'Kernel packaging:'
  955. @$(MAKE) $(build)=$(package-dir) help
  956. @echo ''
  957. @echo 'Documentation targets:'
  958. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  959. @echo ''
  960. @echo 'Architecture specific targets ($(ARCH)):'
  961. @$(if $(archhelp),$(archhelp),\
  962. echo ' No architecture specific help defined for $(ARCH)')
  963. @echo ''
  964. @$(if $(boards), \
  965. $(foreach b, $(boards), \
  966. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  967. echo '')
  968. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  969. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  970. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  971. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  972. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  973. @echo ''
  974. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  975. @echo 'For further info see the ./README file'
  976. # Documentation targets
  977. # ---------------------------------------------------------------------------
  978. %docs: scripts_basic FORCE
  979. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  980. else # KBUILD_EXTMOD
  981. ###
  982. # External module support.
  983. # When building external modules the kernel used as basis is considered
  984. # read-only, and no consistency checks are made and the make
  985. # system is not used on the basis kernel. If updates are required
  986. # in the basis kernel ordinary make commands (without M=...) must
  987. # be used.
  988. #
  989. # The following are the only valid targets when building external
  990. # modules.
  991. # make M=dir clean Delete all automatically generated files
  992. # make M=dir modules Make all modules in specified dir
  993. # make M=dir Same as 'make M=dir modules'
  994. # make M=dir modules_install
  995. # Install the modules built in the module directory
  996. # Assumes install directory is already created
  997. # We are always building modules
  998. KBUILD_MODULES := 1
  999. PHONY += crmodverdir
  1000. crmodverdir:
  1001. $(Q)mkdir -p $(MODVERDIR)
  1002. $(Q)rm -f $(MODVERDIR)/*
  1003. PHONY += $(objtree)/Module.symvers
  1004. $(objtree)/Module.symvers:
  1005. @test -e $(objtree)/Module.symvers || ( \
  1006. echo; \
  1007. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1008. echo " is missing; modules will have no dependencies and modversions."; \
  1009. echo )
  1010. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1011. PHONY += $(module-dirs) modules
  1012. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1013. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1014. modules: $(module-dirs)
  1015. @echo ' Building modules, stage 2.';
  1016. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1017. PHONY += modules_install
  1018. modules_install: _emodinst_ _emodinst_post
  1019. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1020. PHONY += _emodinst_
  1021. _emodinst_:
  1022. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1023. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1024. # Run depmod only is we have System.map and depmod is executable
  1025. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1026. cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
  1027. $(DEPMOD) -ae -F System.map \
  1028. $(if $(strip $(INSTALL_MOD_PATH)), \
  1029. -b $(INSTALL_MOD_PATH) -r) \
  1030. $(KERNELRELEASE); \
  1031. fi
  1032. PHONY += _emodinst_post
  1033. _emodinst_post: _emodinst_
  1034. $(call cmd,depmod)
  1035. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1036. PHONY += $(clean-dirs) clean
  1037. $(clean-dirs):
  1038. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1039. clean: rm-dirs := $(MODVERDIR)
  1040. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1041. clean: $(clean-dirs)
  1042. $(call cmd,rmdirs)
  1043. $(call cmd,rmfiles)
  1044. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  1045. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1046. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  1047. -type f -print | xargs rm -f
  1048. help:
  1049. @echo ' Building external modules.'
  1050. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1051. @echo ''
  1052. @echo ' modules - default target, build the module(s)'
  1053. @echo ' modules_install - install the module'
  1054. @echo ' clean - remove generated files in module directory only'
  1055. @echo ''
  1056. # Dummies...
  1057. PHONY += prepare scripts
  1058. prepare: ;
  1059. scripts: ;
  1060. endif # KBUILD_EXTMOD
  1061. # Generate tags for editors
  1062. # ---------------------------------------------------------------------------
  1063. #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
  1064. #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
  1065. #Adding $(srctree) adds about 20M on i386 to the size of the output file!
  1066. ifeq ($(src),$(obj))
  1067. __srctree =
  1068. else
  1069. __srctree = $(srctree)/
  1070. endif
  1071. ifeq ($(ALLSOURCE_ARCHS),)
  1072. ifeq ($(ARCH),um)
  1073. ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
  1074. else
  1075. ALLINCLUDE_ARCHS := $(SRCARCH)
  1076. endif
  1077. else
  1078. #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
  1079. ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
  1080. endif
  1081. # Take care of arch/x86
  1082. ifeq ($(ARCH), $(SRCARCH))
  1083. ALLSOURCE_ARCHS := $(ARCH)
  1084. else
  1085. ALLSOURCE_ARCHS := $(ARCH) $(SRCARCH)
  1086. endif
  1087. define find-sources
  1088. ( for ARCH in $(ALLSOURCE_ARCHS) ; do \
  1089. find $(__srctree)arch/$${SRCARCH} $(RCS_FIND_IGNORE) \
  1090. -name $1 -print; \
  1091. done ; \
  1092. find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
  1093. -name $1 -print; \
  1094. find $(__srctree)include $(RCS_FIND_IGNORE) \
  1095. \( -name config -o -name 'asm-*' \) -prune \
  1096. -o -name $1 -print; \
  1097. for ARCH in $(ALLINCLUDE_ARCHS) ; do \
  1098. find $(__srctree)include/asm-$${SRCARCH} $(RCS_FIND_IGNORE) \
  1099. -name $1 -print; \
  1100. done ; \
  1101. find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
  1102. -name $1 -print; \
  1103. find $(__srctree) $(RCS_FIND_IGNORE) \
  1104. \( -name include -o -name arch \) -prune -o \
  1105. -name $1 -print; \
  1106. )
  1107. endef
  1108. define all-sources
  1109. $(call find-sources,'*.[chS]')
  1110. endef
  1111. define all-kconfigs
  1112. $(call find-sources,'Kconfig*')
  1113. endef
  1114. define all-defconfigs
  1115. $(call find-sources,'defconfig')
  1116. endef
  1117. define xtags
  1118. if $1 --version 2>&1 | grep -iq exuberant; then \
  1119. $(all-sources) | xargs $1 -a \
  1120. -I __initdata,__exitdata,__acquires,__releases \
  1121. -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
  1122. --extra=+f --c-kinds=+px \
  1123. --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
  1124. $(all-kconfigs) | xargs $1 -a \
  1125. --langdef=kconfig \
  1126. --language-force=kconfig \
  1127. --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
  1128. $(all-defconfigs) | xargs -r $1 -a \
  1129. --langdef=dotconfig \
  1130. --language-force=dotconfig \
  1131. --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
  1132. elif $1 --version 2>&1 | grep -iq emacs; then \
  1133. $(all-sources) | xargs $1 -a; \
  1134. $(all-kconfigs) | xargs $1 -a \
  1135. --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
  1136. $(all-defconfigs) | xargs -r $1 -a \
  1137. --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
  1138. else \
  1139. $(all-sources) | xargs $1 -a; \
  1140. fi
  1141. endef
  1142. quiet_cmd_cscope-file = FILELST cscope.files
  1143. cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
  1144. quiet_cmd_cscope = MAKE cscope.out
  1145. cmd_cscope = cscope -b
  1146. cscope: FORCE
  1147. $(call cmd,cscope-file)
  1148. $(call cmd,cscope)
  1149. quiet_cmd_TAGS = MAKE $@
  1150. define cmd_TAGS
  1151. rm -f $@; \
  1152. $(call xtags,etags)
  1153. endef
  1154. TAGS: FORCE
  1155. $(call cmd,TAGS)
  1156. quiet_cmd_tags = MAKE $@
  1157. define cmd_tags
  1158. rm -f $@; \
  1159. $(call xtags,ctags)
  1160. endef
  1161. tags: FORCE
  1162. $(call cmd,tags)
  1163. # Scripts to check various things for consistency
  1164. # ---------------------------------------------------------------------------
  1165. includecheck:
  1166. find * $(RCS_FIND_IGNORE) \
  1167. -name '*.[hcS]' -type f -print | sort \
  1168. | xargs $(PERL) -w scripts/checkincludes.pl
  1169. versioncheck:
  1170. find * $(RCS_FIND_IGNORE) \
  1171. -name '*.[hcS]' -type f -print | sort \
  1172. | xargs $(PERL) -w scripts/checkversion.pl
  1173. namespacecheck:
  1174. $(PERL) $(srctree)/scripts/namespace.pl
  1175. endif #ifeq ($(config-targets),1)
  1176. endif #ifeq ($(mixed-targets),1)
  1177. PHONY += checkstack kernelrelease kernelversion
  1178. # UML needs a little special treatment here. It wants to use the host
  1179. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1180. # else wants $(ARCH), including people doing cross-builds, which means
  1181. # that $(SUBARCH) doesn't work here.
  1182. ifeq ($(ARCH), um)
  1183. CHECKSTACK_ARCH := $(SUBARCH)
  1184. else
  1185. CHECKSTACK_ARCH := $(ARCH)
  1186. endif
  1187. checkstack:
  1188. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1189. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1190. kernelrelease:
  1191. $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  1192. $(error kernelrelease not valid - run 'make prepare' to update it))
  1193. kernelversion:
  1194. @echo $(KERNELVERSION)
  1195. # Single targets
  1196. # ---------------------------------------------------------------------------
  1197. # Single targets are compatible with:
  1198. # - build whith mixed source and output
  1199. # - build with separate output dir 'make O=...'
  1200. # - external modules
  1201. #
  1202. # target-dir => where to store outputfile
  1203. # build-dir => directory in kernel source tree to use
  1204. ifeq ($(KBUILD_EXTMOD),)
  1205. build-dir = $(patsubst %/,%,$(dir $@))
  1206. target-dir = $(dir $@)
  1207. else
  1208. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1209. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1210. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1211. endif
  1212. %.s: %.c prepare scripts FORCE
  1213. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1214. %.i: %.c prepare scripts FORCE
  1215. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1216. %.o: %.c prepare scripts FORCE
  1217. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1218. %.lst: %.c prepare scripts FORCE
  1219. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1220. %.s: %.S prepare scripts FORCE
  1221. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1222. %.o: %.S prepare scripts FORCE
  1223. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1224. %.symtypes: %.c prepare scripts FORCE
  1225. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1226. # Modules
  1227. / %/: prepare scripts FORCE
  1228. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1229. $(build)=$(build-dir)
  1230. %.ko: prepare scripts FORCE
  1231. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1232. $(build)=$(build-dir) $(@:.ko=.o)
  1233. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1234. # FIXME Should go into a make.lib or something
  1235. # ===========================================================================
  1236. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1237. cmd_rmdirs = rm -rf $(rm-dirs)
  1238. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1239. cmd_rmfiles = rm -f $(rm-files)
  1240. a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
  1241. $(NOSTDINC_FLAGS) $(CPPFLAGS) \
  1242. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1243. quiet_cmd_as_o_S = AS $@
  1244. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1245. # read all saved command lines
  1246. targets := $(wildcard $(sort $(targets)))
  1247. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1248. ifneq ($(cmd_files),)
  1249. $(cmd_files): ; # Do not try to update included dependency files
  1250. include $(cmd_files)
  1251. endif
  1252. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1253. # Usage:
  1254. # $(Q)$(MAKE) $(clean)=dir
  1255. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1256. endif # skip-makefile
  1257. PHONY += FORCE
  1258. FORCE:
  1259. # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
  1260. Makefile: ;
  1261. # Declare the contents of the .PHONY variable as phony. We keep that
  1262. # information in a variable se we can use it in if_changed and friends.
  1263. .PHONY: $(PHONY)