Makefile 49 KB

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  1. VERSION = 2
  2. PATCHLEVEL = 6
  3. SUBLEVEL = 21
  4. EXTRAVERSION = .5-cfs-v19
  5. NAME = Nocturnal Monster Puppy
  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. PHONY += $(MAKECMDGOALS)
  104. $(filter-out _all,$(MAKECMDGOALS)) _all:
  105. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  106. KBUILD_SRC=$(CURDIR) \
  107. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
  108. # Leave processing to above invocation of make
  109. skip-makefile := 1
  110. endif # ifneq ($(KBUILD_OUTPUT),)
  111. endif # ifeq ($(KBUILD_SRC),)
  112. # We process the rest of the Makefile if this is the final invocation of make
  113. ifeq ($(skip-makefile),)
  114. # If building an external module we do not care about the all: rule
  115. # but instead _all depend on modules
  116. PHONY += all
  117. ifeq ($(KBUILD_EXTMOD),)
  118. _all: all
  119. else
  120. _all: modules
  121. endif
  122. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  123. TOPDIR := $(srctree)
  124. # FIXME - TOPDIR is obsolete, use srctree/objtree
  125. objtree := $(CURDIR)
  126. src := $(srctree)
  127. obj := $(objtree)
  128. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  129. export srctree objtree VPATH TOPDIR
  130. # SUBARCH tells the usermode build what the underlying arch is. That is set
  131. # first, and if a usermode build is happening, the "ARCH=um" on the command
  132. # line overrides the setting of ARCH below. If a native build is happening,
  133. # then ARCH is assigned, getting whatever value it gets normally, and
  134. # SUBARCH is subsequently ignored.
  135. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  136. -e s/arm.*/arm/ -e s/sa110/arm/ \
  137. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  138. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
  139. # Cross compiling and selecting different set of gcc/bin-utils
  140. # ---------------------------------------------------------------------------
  141. #
  142. # When performing cross compilation for other architectures ARCH shall be set
  143. # to the target architecture. (See arch/* for the possibilities).
  144. # ARCH can be set during invocation of make:
  145. # make ARCH=ia64
  146. # Another way is to have ARCH set in the environment.
  147. # The default ARCH is the host where make is executed.
  148. # CROSS_COMPILE specify the prefix used for all executables used
  149. # during compilation. Only gcc and related bin-utils executables
  150. # are prefixed with $(CROSS_COMPILE).
  151. # CROSS_COMPILE can be set on the command line
  152. # make CROSS_COMPILE=ia64-linux-
  153. # Alternatively CROSS_COMPILE can be set in the environment.
  154. # Default value for CROSS_COMPILE is not to prefix executables
  155. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  156. ARCH := arm
  157. CROSS_COMPILE := $(shell if [ -f .cross_compile ]; then \
  158. cat .cross_compile; \
  159. fi)
  160. # Architecture as present in compile.h
  161. UTS_MACHINE := $(ARCH)
  162. KCONFIG_CONFIG ?= .config
  163. # SHELL used by kbuild
  164. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  165. else if [ -x /bin/bash ]; then echo /bin/bash; \
  166. else echo sh; fi ; fi)
  167. HOSTCC = gcc
  168. HOSTCXX = g++
  169. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  170. HOSTCXXFLAGS = -O2
  171. # Decide whether to build built-in, modular, or both.
  172. # Normally, just do built-in.
  173. KBUILD_MODULES :=
  174. KBUILD_BUILTIN := 1
  175. # If we have only "make modules", don't compile built-in objects.
  176. # When we're building modules with modversions, we need to consider
  177. # the built-in objects during the descend as well, in order to
  178. # make sure the checksums are up to date before we record them.
  179. ifeq ($(MAKECMDGOALS),modules)
  180. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  181. endif
  182. # If we have "make <whatever> modules", compile modules
  183. # in addition to whatever we do anyway.
  184. # Just "make" or "make all" shall build modules as well
  185. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  186. KBUILD_MODULES := 1
  187. endif
  188. ifeq ($(MAKECMDGOALS),)
  189. KBUILD_MODULES := 1
  190. endif
  191. export KBUILD_MODULES KBUILD_BUILTIN
  192. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  193. # Beautify output
  194. # ---------------------------------------------------------------------------
  195. #
  196. # Normally, we echo the whole command before executing it. By making
  197. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  198. # $(quiet) to choose other forms of output instead, e.g.
  199. #
  200. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  201. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  202. #
  203. # If $(quiet) is empty, the whole command will be printed.
  204. # If it is set to "quiet_", only the short version will be printed.
  205. # If it is set to "silent_", nothing will be printed at all, since
  206. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  207. #
  208. # A simple variant is to prefix commands with $(Q) - that's useful
  209. # for commands that shall be hidden in non-verbose mode.
  210. #
  211. # $(Q)ln $@ :<
  212. #
  213. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  214. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  215. ifeq ($(KBUILD_VERBOSE),1)
  216. quiet =
  217. Q =
  218. else
  219. quiet=quiet_
  220. Q = @
  221. endif
  222. # If the user is running make -s (silent mode), suppress echoing of
  223. # commands
  224. ifneq ($(findstring s,$(MAKEFLAGS)),)
  225. quiet=silent_
  226. endif
  227. export quiet Q KBUILD_VERBOSE
  228. # Look for make include files relative to root of kernel src
  229. MAKEFLAGS += --include-dir=$(srctree)
  230. # We need some generic definitions.
  231. include $(srctree)/scripts/Kbuild.include
  232. # Make variables (CC, etc...)
  233. AS = $(CROSS_COMPILE)as
  234. LD = $(CROSS_COMPILE)ld
  235. CC = $(CROSS_COMPILE)gcc
  236. CPP = $(CC) -E
  237. AR = $(CROSS_COMPILE)ar
  238. NM = $(CROSS_COMPILE)nm
  239. STRIP = $(CROSS_COMPILE)strip
  240. OBJCOPY = $(CROSS_COMPILE)objcopy
  241. OBJDUMP = $(CROSS_COMPILE)objdump
  242. READELF = $(CROSS_COMPILE)readelf
  243. AWK = awk
  244. GENKSYMS = scripts/genksyms/genksyms
  245. DEPMOD = /sbin/depmod
  246. KALLSYMS = scripts/kallsyms
  247. PERL = perl
  248. CHECK = sparse
  249. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
  250. MODFLAGS = -DMODULE
  251. CFLAGS_MODULE = $(MODFLAGS)
  252. AFLAGS_MODULE = $(MODFLAGS)
  253. LDFLAGS_MODULE = -r
  254. CFLAGS_KERNEL =
  255. AFLAGS_KERNEL =
  256. # Use LINUXINCLUDE when you must reference the include/ directory.
  257. # Needed to be compatible with the O= option
  258. LINUXINCLUDE := -Iinclude \
  259. $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
  260. -include include/linux/autoconf.h
  261. CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
  262. CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  263. -fno-strict-aliasing -fno-common
  264. AFLAGS := -D__ASSEMBLY__
  265. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  266. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  267. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  268. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  269. export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  270. export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
  271. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  272. export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  273. export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
  274. export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  275. # When compiling out-of-tree modules, put MODVERDIR in the module
  276. # tree rather than in the kernel tree. The kernel tree might
  277. # even be read-only.
  278. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  279. # Files to ignore in find ... statements
  280. 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
  281. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  282. # ===========================================================================
  283. # Rules shared between *config targets and build targets
  284. # Basic helpers built in scripts/
  285. PHONY += scripts_basic
  286. scripts_basic:
  287. $(Q)$(MAKE) $(build)=scripts/basic
  288. # To avoid any implicit rule to kick in, define an empty command.
  289. scripts/basic/%: scripts_basic ;
  290. PHONY += outputmakefile
  291. # outputmakefile generates a Makefile in the output directory, if using a
  292. # separate output directory. This allows convenient use of make in the
  293. # output directory.
  294. outputmakefile:
  295. ifneq ($(KBUILD_SRC),)
  296. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  297. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  298. endif
  299. # To make sure we do not include .config for any of the *config targets
  300. # catch them early, and hand them over to scripts/kconfig/Makefile
  301. # It is allowed to specify more targets when calling make, including
  302. # mixing *config targets and build targets.
  303. # For example 'make oldconfig all'.
  304. # Detect when mixed targets is specified, and make a second invocation
  305. # of make so .config is not included in this case either (for *config).
  306. no-dot-config-targets := clean mrproper distclean \
  307. cscope TAGS tags help %docs check% \
  308. include/linux/version.h headers_% \
  309. kernelrelease kernelversion
  310. config-targets := 0
  311. mixed-targets := 0
  312. dot-config := 1
  313. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  314. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  315. dot-config := 0
  316. endif
  317. endif
  318. ifeq ($(KBUILD_EXTMOD),)
  319. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  320. config-targets := 1
  321. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  322. mixed-targets := 1
  323. endif
  324. endif
  325. endif
  326. ifeq ($(mixed-targets),1)
  327. # ===========================================================================
  328. # We're called with mixed targets (*config and build targets).
  329. # Handle them one by one.
  330. %:: FORCE
  331. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  332. else
  333. ifeq ($(config-targets),1)
  334. # ===========================================================================
  335. # *config targets only - make sure prerequisites are updated, and descend
  336. # in scripts/kconfig to make the *config target
  337. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  338. # KBUILD_DEFCONFIG may point out an alternative default configuration
  339. # used for 'make defconfig'
  340. include $(srctree)/arch/$(ARCH)/Makefile
  341. export KBUILD_DEFCONFIG
  342. config %config: scripts_basic outputmakefile FORCE
  343. $(Q)mkdir -p include/linux include/config
  344. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  345. else
  346. # ===========================================================================
  347. # Build targets only - this includes vmlinux, arch specific targets, clean
  348. # targets and others. In general all targets except *config targets.
  349. ifeq ($(KBUILD_EXTMOD),)
  350. # Additional helpers built in scripts/
  351. # Carefully list dependencies so we do not try to build scripts twice
  352. # in parallel
  353. PHONY += scripts
  354. scripts: scripts_basic include/config/auto.conf
  355. $(Q)$(MAKE) $(build)=$(@)
  356. # Objects we will link into vmlinux / subdirs we need to visit
  357. init-y := init/
  358. drivers-y := drivers/ sound/
  359. net-y := net/
  360. libs-y := lib/
  361. core-y := usr/
  362. endif # KBUILD_EXTMOD
  363. ifeq ($(dot-config),1)
  364. # Read in config
  365. -include include/config/auto.conf
  366. ifeq ($(KBUILD_EXTMOD),)
  367. # Read in dependencies to all Kconfig* files, make sure to run
  368. # oldconfig if changes are detected.
  369. -include include/config/auto.conf.cmd
  370. # To avoid any implicit rule to kick in, define an empty command
  371. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  372. # If .config is newer than include/config/auto.conf, someone tinkered
  373. # with it and forgot to run make oldconfig.
  374. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  375. # we execute the config step to be sure to catch updated Kconfig files
  376. include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  377. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  378. else
  379. # external modules needs include/linux/autoconf.h and include/config/auto.conf
  380. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  381. PHONY += include/config/auto.conf
  382. include/config/auto.conf:
  383. $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
  384. echo; \
  385. echo " ERROR: Kernel configuration is invalid."; \
  386. echo " include/linux/autoconf.h or $@ are missing."; \
  387. echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  388. echo; \
  389. /bin/false)
  390. endif # KBUILD_EXTMOD
  391. else
  392. # Dummy target needed, because used as prerequisite
  393. include/config/auto.conf: ;
  394. endif # $(dot-config)
  395. # The all: target is the default when no target is given on the
  396. # command line.
  397. # This allow a user to issue only 'make' to build a kernel including modules
  398. # Defaults vmlinux but it is usually overridden in the arch makefile
  399. all: vmlinux
  400. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  401. CFLAGS += -Os
  402. else
  403. CFLAGS += -O2
  404. endif
  405. include $(srctree)/arch/$(ARCH)/Makefile
  406. ifdef CONFIG_FRAME_POINTER
  407. CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
  408. else
  409. CFLAGS += -fomit-frame-pointer
  410. endif
  411. ifdef CONFIG_DEBUG_INFO
  412. CFLAGS += -g
  413. endif
  414. # Force gcc to behave correct even for buggy distributions
  415. CFLAGS += $(call cc-option, -fno-stack-protector)
  416. # arch Makefile may override CC so keep this after arch Makefile is included
  417. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  418. CHECKFLAGS += $(NOSTDINC_FLAGS)
  419. # warn about C99 declaration after statement
  420. CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  421. # disable pointer signed / unsigned warnings in gcc 4.0
  422. CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  423. # Default kernel image to build when no specific target is given.
  424. # KBUILD_IMAGE may be overruled on the command line or
  425. # set in the environment
  426. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  427. # this default value
  428. export KBUILD_IMAGE ?= vmlinux
  429. #
  430. # INSTALL_PATH specifies where to place the updated kernel and system map
  431. # images. Default is /boot, but you can set it to other values
  432. export INSTALL_PATH ?= /boot
  433. #
  434. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  435. # relocations required by build roots. This is not defined in the
  436. # makefile but the argument can be passed to make if needed.
  437. #
  438. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  439. export MODLIB
  440. #
  441. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  442. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  443. # the default option --strip-debug will be used. Otherwise,
  444. # INSTALL_MOD_STRIP will used as the options to the strip command.
  445. ifdef INSTALL_MOD_STRIP
  446. ifeq ($(INSTALL_MOD_STRIP),1)
  447. mod_strip_cmd = $(STRIP) --strip-debug
  448. else
  449. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  450. endif # INSTALL_MOD_STRIP=1
  451. else
  452. mod_strip_cmd = true
  453. endif # INSTALL_MOD_STRIP
  454. export mod_strip_cmd
  455. ifeq ($(KBUILD_EXTMOD),)
  456. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  457. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  458. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  459. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  460. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  461. $(init-n) $(init-) \
  462. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  463. $(net-n) $(net-) $(libs-n) $(libs-))))
  464. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  465. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  466. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  467. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  468. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  469. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  470. libs-y := $(libs-y1) $(libs-y2)
  471. # Build vmlinux
  472. # ---------------------------------------------------------------------------
  473. # vmlinux is built from the objects selected by $(vmlinux-init) and
  474. # $(vmlinux-main). Most are built-in.o files from top-level directories
  475. # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
  476. # Ordering when linking is important, and $(vmlinux-init) must be first.
  477. #
  478. # vmlinux
  479. # ^
  480. # |
  481. # +-< $(vmlinux-init)
  482. # | +--< init/version.o + more
  483. # |
  484. # +--< $(vmlinux-main)
  485. # | +--< driver/built-in.o mm/built-in.o + more
  486. # |
  487. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  488. #
  489. # vmlinux version (uname -v) cannot be updated during normal
  490. # descending-into-subdirs phase since we do not yet know if we need to
  491. # update vmlinux.
  492. # Therefore this step is delayed until just before final link of vmlinux -
  493. # except in the kallsyms case where it is done just before adding the
  494. # symbols to the kernel.
  495. #
  496. # System.map is generated to document addresses of all kernel symbols
  497. vmlinux-init := $(head-y) $(init-y)
  498. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  499. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  500. vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
  501. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  502. # May be overridden by arch/$(ARCH)/Makefile
  503. quiet_cmd_vmlinux__ ?= LD $@
  504. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  505. -T $(vmlinux-lds) $(vmlinux-init) \
  506. --start-group $(vmlinux-main) --end-group \
  507. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
  508. # Generate new vmlinux version
  509. quiet_cmd_vmlinux_version = GEN .version
  510. cmd_vmlinux_version = set -e; \
  511. if [ ! -r .version ]; then \
  512. rm -f .version; \
  513. echo 1 >.version; \
  514. else \
  515. mv .version .old_version; \
  516. expr 0$$(cat .old_version) + 1 >.version; \
  517. fi; \
  518. $(MAKE) $(build)=init
  519. # Generate System.map
  520. quiet_cmd_sysmap = SYSMAP
  521. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  522. # Link of vmlinux
  523. # If CONFIG_KALLSYMS is set .version is already updated
  524. # Generate System.map and verify that the content is consistent
  525. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  526. # First command is ':' to allow us to use + in front of the rule
  527. define rule_vmlinux__
  528. :
  529. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  530. $(call cmd,vmlinux__)
  531. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  532. $(Q)$(if $($(quiet)cmd_sysmap), \
  533. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  534. $(cmd_sysmap) $@ System.map; \
  535. if [ $$? -ne 0 ]; then \
  536. rm -f $@; \
  537. /bin/false; \
  538. fi;
  539. $(verify_kallsyms)
  540. endef
  541. ifdef CONFIG_KALLSYMS
  542. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  543. # It's a three stage process:
  544. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  545. # empty
  546. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  547. # the right size - vmlinux version (uname -v) is updated during this step
  548. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  549. # but due to the added section, some addresses have shifted.
  550. # From here, we generate a correct .tmp_kallsyms2.o
  551. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  552. # o Verify that the System.map from vmlinux matches the map from
  553. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  554. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  555. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  556. # temporary bypass to allow the kernel to be built while the
  557. # maintainers work out what went wrong with kallsyms.
  558. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  559. last_kallsyms := 3
  560. else
  561. last_kallsyms := 2
  562. endif
  563. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  564. define verify_kallsyms
  565. $(Q)$(if $($(quiet)cmd_sysmap), \
  566. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  567. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  568. $(Q)cmp -s System.map .tmp_System.map || \
  569. (echo Inconsistent kallsyms data; \
  570. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  571. rm .tmp_kallsyms* ; /bin/false )
  572. endef
  573. # Update vmlinux version before link
  574. # Use + in front of this rule to silent warning about make -j1
  575. # First command is ':' to allow us to use + in front of this rule
  576. cmd_ksym_ld = $(cmd_vmlinux__)
  577. define rule_ksym_ld
  578. :
  579. +$(call cmd,vmlinux_version)
  580. $(call cmd,vmlinux__)
  581. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  582. endef
  583. # Generate .S file with all kernel symbols
  584. quiet_cmd_kallsyms = KSYM $@
  585. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  586. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  587. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  588. $(call if_changed_dep,as_o_S)
  589. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  590. $(call cmd,kallsyms)
  591. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  592. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  593. $(call if_changed_rule,ksym_ld)
  594. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  595. $(call if_changed,vmlinux__)
  596. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  597. $(call if_changed,vmlinux__)
  598. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  599. $(KALLSYMS): scripts ;
  600. # Generate some data for debugging strange kallsyms problems
  601. debug_kallsyms: .tmp_map$(last_kallsyms)
  602. .tmp_map%: .tmp_vmlinux% FORCE
  603. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  604. .tmp_map3: .tmp_map2
  605. .tmp_map2: .tmp_map1
  606. endif # ifdef CONFIG_KALLSYMS
  607. # vmlinux image - including updated kernel symbols
  608. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
  609. ifdef CONFIG_HEADERS_CHECK
  610. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  611. endif
  612. $(call if_changed_rule,vmlinux__)
  613. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  614. $(Q)rm -f .old_version
  615. # The actual objects are generated when descending,
  616. # make sure no implicit rule kicks in
  617. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  618. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  619. # Preset locale variables to speed up the build process. Limit locale
  620. # tweaks to this spot to avoid wrong language settings when running
  621. # make menuconfig etc.
  622. # Error messages still appears in the original language
  623. PHONY += $(vmlinux-dirs)
  624. $(vmlinux-dirs): prepare scripts
  625. $(Q)$(MAKE) $(build)=$@
  626. # Build the kernel release string
  627. #
  628. # The KERNELRELEASE value built here is stored in the file
  629. # include/config/kernel.release, and is used when executing several
  630. # make targets, such as "make install" or "make modules_install."
  631. #
  632. # The eventual kernel release string consists of the following fields,
  633. # shown in a hierarchical format to show how smaller parts are concatenated
  634. # to form the larger and final value, with values coming from places like
  635. # the Makefile, kernel config options, make command line options and/or
  636. # SCM tag information.
  637. #
  638. # $(KERNELVERSION)
  639. # $(VERSION) eg, 2
  640. # $(PATCHLEVEL) eg, 6
  641. # $(SUBLEVEL) eg, 18
  642. # $(EXTRAVERSION) eg, -rc6
  643. # $(localver-full)
  644. # $(localver)
  645. # localversion* (files without backups, containing '~')
  646. # $(CONFIG_LOCALVERSION) (from kernel config setting)
  647. # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
  648. # ./scripts/setlocalversion (SCM tag, if one exists)
  649. # $(LOCALVERSION) (from make command line if provided)
  650. #
  651. # Note how the final $(localver-auto) string is included *only* if the
  652. # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
  653. # moment, only git is supported but other SCMs can edit the script
  654. # scripts/setlocalversion and add the appropriate checks as needed.
  655. pattern = ".*/localversion[^~]*"
  656. string = $(shell cat /dev/null \
  657. `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
  658. localver = $(subst $(space),, $(string) \
  659. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  660. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  661. # and if the SCM is know a tag from the SCM is appended.
  662. # The appended tag is determined by the SCM used.
  663. #
  664. # Currently, only git is supported.
  665. # Other SCMs can edit scripts/setlocalversion and add the appropriate
  666. # checks as needed.
  667. ifdef CONFIG_LOCALVERSION_AUTO
  668. _localver-auto = $(shell $(CONFIG_SHELL) \
  669. $(srctree)/scripts/setlocalversion $(srctree))
  670. localver-auto = $(LOCALVERSION)$(_localver-auto)
  671. endif
  672. localver-full = $(localver)$(localver-auto)
  673. # Store (new) KERNELRELASE string in include/config/kernel.release
  674. kernelrelease = $(KERNELVERSION)$(localver-full)
  675. include/config/kernel.release: include/config/auto.conf FORCE
  676. $(Q)rm -f $@
  677. $(Q)echo $(kernelrelease) > $@
  678. # Things we need to do before we recursively start building the kernel
  679. # or the modules are listed in "prepare".
  680. # A multi level approach is used. prepareN is processed before prepareN-1.
  681. # archprepare is used in arch Makefiles and when processed asm symlink,
  682. # version.h and scripts_basic is processed / created.
  683. # Listed in dependency order
  684. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  685. # prepare3 is used to check if we are building in a separate output directory,
  686. # and if so do:
  687. # 1) Check that make has not been executed in the kernel src $(srctree)
  688. # 2) Create the include2 directory, used for the second asm symlink
  689. prepare3: include/config/kernel.release
  690. ifneq ($(KBUILD_SRC),)
  691. @echo ' Using $(srctree) as source for kernel'
  692. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  693. echo " $(srctree) is not clean, please run 'make mrproper'";\
  694. echo " in the '$(srctree)' directory.";\
  695. /bin/false; \
  696. fi;
  697. $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
  698. $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
  699. endif
  700. # prepare2 creates a makefile if using a separate output directory
  701. prepare2: prepare3 outputmakefile
  702. prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
  703. include/asm include/config/auto.conf
  704. ifneq ($(KBUILD_MODULES),)
  705. $(Q)mkdir -p $(MODVERDIR)
  706. $(Q)rm -f $(MODVERDIR)/*
  707. endif
  708. archprepare: prepare1 scripts_basic
  709. prepare0: archprepare FORCE
  710. $(Q)$(MAKE) $(build)=.
  711. # All the preparing..
  712. prepare: prepare0
  713. # Leave this as default for preprocessing vmlinux.lds.S, which is now
  714. # done in arch/$(ARCH)/kernel/Makefile
  715. export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
  716. # FIXME: The asm symlink changes when $(ARCH) changes. That's
  717. # hard to detect, but I suppose "make mrproper" is a good idea
  718. # before switching between archs anyway.
  719. include/asm:
  720. @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
  721. $(Q)if [ ! -d include ]; then mkdir -p include; fi;
  722. @ln -fsn asm-$(ARCH) $@
  723. # Generate some files
  724. # ---------------------------------------------------------------------------
  725. # KERNELRELEASE can change from a few different places, meaning version.h
  726. # needs to be updated, so this check is forced on all builds
  727. uts_len := 64
  728. define filechk_utsrelease.h
  729. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  730. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  731. exit 1; \
  732. fi; \
  733. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  734. endef
  735. define filechk_version.h
  736. (echo \#define LINUX_VERSION_CODE $(shell \
  737. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  738. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  739. endef
  740. include/linux/version.h: $(srctree)/Makefile FORCE
  741. $(call filechk,version.h)
  742. include/linux/utsrelease.h: include/config/kernel.release FORCE
  743. $(call filechk,utsrelease.h)
  744. # ---------------------------------------------------------------------------
  745. PHONY += depend dep
  746. depend dep:
  747. @echo '*** Warning: make $@ is unnecessary now.'
  748. # ---------------------------------------------------------------------------
  749. # Kernel headers
  750. INSTALL_HDR_PATH=$(objtree)/usr
  751. export INSTALL_HDR_PATH
  752. HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
  753. PHONY += headers_install_all
  754. headers_install_all: include/linux/version.h scripts_basic FORCE
  755. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  756. $(Q)for arch in $(HDRARCHES); do \
  757. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
  758. done
  759. PHONY += headers_install
  760. headers_install: include/linux/version.h scripts_basic FORCE
  761. @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
  762. echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
  763. exit 1 ; fi
  764. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  765. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
  766. PHONY += headers_check_all
  767. headers_check_all: headers_install_all
  768. $(Q)for arch in $(HDRARCHES); do \
  769. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
  770. done
  771. PHONY += headers_check
  772. headers_check: headers_install
  773. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
  774. # ---------------------------------------------------------------------------
  775. # Modules
  776. ifdef CONFIG_MODULES
  777. # By default, build modules as well
  778. all: modules
  779. # Build modules
  780. PHONY += modules
  781. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  782. @echo ' Building modules, stage 2.';
  783. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  784. # Target to prepare building external modules
  785. PHONY += modules_prepare
  786. modules_prepare: prepare scripts
  787. # Target to install modules
  788. PHONY += modules_install
  789. modules_install: _modinst_ _modinst_post
  790. PHONY += _modinst_
  791. _modinst_:
  792. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  793. echo "Warning: you may need to install module-init-tools"; \
  794. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  795. sleep 1; \
  796. fi
  797. @rm -rf $(MODLIB)/kernel
  798. @rm -f $(MODLIB)/source
  799. @mkdir -p $(MODLIB)/kernel
  800. @ln -s $(srctree) $(MODLIB)/source
  801. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  802. rm -f $(MODLIB)/build ; \
  803. ln -s $(objtree) $(MODLIB)/build ; \
  804. fi
  805. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  806. # If System.map exists, run depmod. This deliberately does not have a
  807. # dependency on System.map since that would run the dependency tree on
  808. # vmlinux. This depmod is only for convenience to give the initial
  809. # boot a modules.dep even before / is mounted read-write. However the
  810. # boot script depmod is the master version.
  811. ifeq "$(strip $(INSTALL_MOD_PATH))" ""
  812. depmod_opts :=
  813. else
  814. depmod_opts := -b $(INSTALL_MOD_PATH) -r
  815. endif
  816. PHONY += _modinst_post
  817. _modinst_post: _modinst_
  818. if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
  819. else # CONFIG_MODULES
  820. # Modules not configured
  821. # ---------------------------------------------------------------------------
  822. modules modules_install: FORCE
  823. @echo
  824. @echo "The present kernel configuration has modules disabled."
  825. @echo "Type 'make config' and enable loadable module support."
  826. @echo "Then build a kernel with module support enabled."
  827. @echo
  828. @exit 1
  829. endif # CONFIG_MODULES
  830. ###
  831. # Cleaning is done on three levels.
  832. # make clean Delete most generated files
  833. # Leave enough to build external modules
  834. # make mrproper Delete the current configuration, and all generated files
  835. # make distclean Remove editor backup files, patch leftover files and the like
  836. # Directories & files removed with 'make clean'
  837. CLEAN_DIRS += $(MODVERDIR)
  838. CLEAN_FILES += vmlinux System.map \
  839. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  840. # Directories & files removed with 'make mrproper'
  841. MRPROPER_DIRS += include/config include2 usr/include
  842. MRPROPER_FILES += .config .config.old include/asm .version .old_version \
  843. include/linux/autoconf.h include/linux/version.h \
  844. include/linux/utsrelease.h \
  845. Module.symvers tags TAGS cscope*
  846. # clean - Delete most, but leave enough to build external modules
  847. #
  848. clean: rm-dirs := $(CLEAN_DIRS)
  849. clean: rm-files := $(CLEAN_FILES)
  850. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
  851. PHONY += $(clean-dirs) clean archclean
  852. $(clean-dirs):
  853. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  854. clean: archclean $(clean-dirs)
  855. $(call cmd,rmdirs)
  856. $(call cmd,rmfiles)
  857. @find . $(RCS_FIND_IGNORE) \
  858. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  859. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  860. -o -name '*.symtypes' \) \
  861. -type f -print | xargs rm -f
  862. # mrproper - Delete all generated files, including .config
  863. #
  864. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  865. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  866. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  867. PHONY += $(mrproper-dirs) mrproper archmrproper
  868. $(mrproper-dirs):
  869. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  870. mrproper: clean archmrproper $(mrproper-dirs)
  871. $(call cmd,rmdirs)
  872. $(call cmd,rmfiles)
  873. # distclean
  874. #
  875. PHONY += distclean
  876. distclean: mrproper
  877. @find $(srctree) $(RCS_FIND_IGNORE) \
  878. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  879. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  880. -o -name '.*.rej' -o -size 0 \
  881. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  882. -type f -print | xargs rm -f
  883. # Packaging of the kernel to various formats
  884. # ---------------------------------------------------------------------------
  885. # rpm target kept for backward compatibility
  886. package-dir := $(srctree)/scripts/package
  887. %pkg: include/config/kernel.release FORCE
  888. $(Q)$(MAKE) $(build)=$(package-dir) $@
  889. rpm: include/config/kernel.release FORCE
  890. $(Q)$(MAKE) $(build)=$(package-dir) $@
  891. # Brief documentation of the typical targets used
  892. # ---------------------------------------------------------------------------
  893. boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
  894. boards := $(notdir $(boards))
  895. help:
  896. @echo 'Cleaning targets:'
  897. @echo ' clean - Remove most generated files but keep the config and'
  898. @echo ' enough build support to build external modules'
  899. @echo ' mrproper - Remove all generated files + config + various backup files'
  900. @echo ' distclean - mrproper + remove editor backup and patch files'
  901. @echo ''
  902. @echo 'Configuration targets:'
  903. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  904. @echo ''
  905. @echo 'Other generic targets:'
  906. @echo ' all - Build all targets marked with [*]'
  907. @echo '* vmlinux - Build the bare kernel'
  908. @echo '* modules - Build all modules'
  909. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  910. @echo ' dir/ - Build all files in dir and below'
  911. @echo ' dir/file.[ois] - Build specified target only'
  912. @echo ' dir/file.ko - Build module including final link'
  913. @echo ' rpm - Build a kernel as an RPM package'
  914. @echo ' tags/TAGS - Generate tags file for editors'
  915. @echo ' cscope - Generate cscope index'
  916. @echo ' kernelrelease - Output the release version string'
  917. @echo ' kernelversion - Output the version stored in Makefile'
  918. @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
  919. echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  920. echo ' (default: $(INSTALL_HDR_PATH))'; \
  921. fi
  922. @echo ''
  923. @echo 'Static analysers'
  924. @echo ' checkstack - Generate a list of stack hogs'
  925. @echo ' namespacecheck - Name space analysis on compiled kernel'
  926. @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
  927. echo ' headers_check - Sanity check on exported headers'; \
  928. fi
  929. @echo ''
  930. @echo 'Kernel packaging:'
  931. @$(MAKE) $(build)=$(package-dir) help
  932. @echo ''
  933. @echo 'Documentation targets:'
  934. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  935. @echo ''
  936. @echo 'Architecture specific targets ($(ARCH)):'
  937. @$(if $(archhelp),$(archhelp),\
  938. echo ' No architecture specific help defined for $(ARCH)')
  939. @echo ''
  940. @$(if $(boards), \
  941. $(foreach b, $(boards), \
  942. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  943. echo '')
  944. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  945. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  946. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  947. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  948. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  949. @echo ''
  950. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  951. @echo 'For further info see the ./README file'
  952. # Documentation targets
  953. # ---------------------------------------------------------------------------
  954. %docs: scripts_basic FORCE
  955. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  956. else # KBUILD_EXTMOD
  957. ###
  958. # External module support.
  959. # When building external modules the kernel used as basis is considered
  960. # read-only, and no consistency checks are made and the make
  961. # system is not used on the basis kernel. If updates are required
  962. # in the basis kernel ordinary make commands (without M=...) must
  963. # be used.
  964. #
  965. # The following are the only valid targets when building external
  966. # modules.
  967. # make M=dir clean Delete all automatically generated files
  968. # make M=dir modules Make all modules in specified dir
  969. # make M=dir Same as 'make M=dir modules'
  970. # make M=dir modules_install
  971. # Install the modules built in the module directory
  972. # Assumes install directory is already created
  973. # We are always building modules
  974. KBUILD_MODULES := 1
  975. PHONY += crmodverdir
  976. crmodverdir:
  977. $(Q)mkdir -p $(MODVERDIR)
  978. $(Q)rm -f $(MODVERDIR)/*
  979. PHONY += $(objtree)/Module.symvers
  980. $(objtree)/Module.symvers:
  981. @test -e $(objtree)/Module.symvers || ( \
  982. echo; \
  983. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  984. echo " is missing; modules will have no dependencies and modversions."; \
  985. echo )
  986. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  987. PHONY += $(module-dirs) modules
  988. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  989. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  990. modules: $(module-dirs)
  991. @echo ' Building modules, stage 2.';
  992. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  993. PHONY += modules_install
  994. modules_install: _emodinst_ _emodinst_post
  995. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  996. PHONY += _emodinst_
  997. _emodinst_:
  998. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  999. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1000. # Run depmod only is we have System.map and depmod is executable
  1001. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1002. cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
  1003. $(DEPMOD) -ae -F System.map \
  1004. $(if $(strip $(INSTALL_MOD_PATH)), \
  1005. -b $(INSTALL_MOD_PATH) -r) \
  1006. $(KERNELRELEASE); \
  1007. fi
  1008. PHONY += _emodinst_post
  1009. _emodinst_post: _emodinst_
  1010. $(call cmd,depmod)
  1011. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1012. PHONY += $(clean-dirs) clean
  1013. $(clean-dirs):
  1014. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1015. clean: rm-dirs := $(MODVERDIR)
  1016. clean: $(clean-dirs)
  1017. $(call cmd,rmdirs)
  1018. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  1019. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1020. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  1021. -type f -print | xargs rm -f
  1022. help:
  1023. @echo ' Building external modules.'
  1024. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1025. @echo ''
  1026. @echo ' modules - default target, build the module(s)'
  1027. @echo ' modules_install - install the module'
  1028. @echo ' clean - remove generated files in module directory only'
  1029. @echo ''
  1030. # Dummies...
  1031. PHONY += prepare scripts
  1032. prepare: ;
  1033. scripts: ;
  1034. endif # KBUILD_EXTMOD
  1035. # Generate tags for editors
  1036. # ---------------------------------------------------------------------------
  1037. #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
  1038. #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
  1039. #Adding $(srctree) adds about 20M on i386 to the size of the output file!
  1040. ifeq ($(src),$(obj))
  1041. __srctree =
  1042. else
  1043. __srctree = $(srctree)/
  1044. endif
  1045. ifeq ($(ALLSOURCE_ARCHS),)
  1046. ifeq ($(ARCH),um)
  1047. ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
  1048. else
  1049. ALLINCLUDE_ARCHS := $(ARCH)
  1050. endif
  1051. else
  1052. #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
  1053. ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
  1054. endif
  1055. ALLSOURCE_ARCHS := $(ARCH)
  1056. define find-sources
  1057. ( find $(__srctree) $(RCS_FIND_IGNORE) \
  1058. \( -name include -o -name arch \) -prune -o \
  1059. -name $1 -print; \
  1060. for ARCH in $(ALLSOURCE_ARCHS) ; do \
  1061. find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
  1062. -name $1 -print; \
  1063. done ; \
  1064. find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
  1065. -name $1 -print; \
  1066. find $(__srctree)include $(RCS_FIND_IGNORE) \
  1067. \( -name config -o -name 'asm-*' \) -prune \
  1068. -o -name $1 -print; \
  1069. for ARCH in $(ALLINCLUDE_ARCHS) ; do \
  1070. find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
  1071. -name $1 -print; \
  1072. done ; \
  1073. find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
  1074. -name $1 -print )
  1075. endef
  1076. define all-sources
  1077. $(call find-sources,'*.[chS]')
  1078. endef
  1079. define all-kconfigs
  1080. $(call find-sources,'Kconfig*')
  1081. endef
  1082. define all-defconfigs
  1083. $(call find-sources,'defconfig')
  1084. endef
  1085. define xtags
  1086. if $1 --version 2>&1 | grep -iq exuberant; then \
  1087. $(all-sources) | xargs $1 -a \
  1088. -I __initdata,__exitdata,__acquires,__releases \
  1089. -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
  1090. --extra=+f --c-kinds=+px \
  1091. --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
  1092. $(all-kconfigs) | xargs $1 -a \
  1093. --langdef=kconfig \
  1094. --language-force=kconfig \
  1095. --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
  1096. $(all-defconfigs) | xargs -r $1 -a \
  1097. --langdef=dotconfig \
  1098. --language-force=dotconfig \
  1099. --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
  1100. elif $1 --version 2>&1 | grep -iq emacs; then \
  1101. $(all-sources) | xargs $1 -a; \
  1102. $(all-kconfigs) | xargs $1 -a \
  1103. --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
  1104. $(all-defconfigs) | xargs -r $1 -a \
  1105. --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
  1106. else \
  1107. $(all-sources) | xargs $1 -a; \
  1108. fi
  1109. endef
  1110. quiet_cmd_cscope-file = FILELST cscope.files
  1111. cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
  1112. quiet_cmd_cscope = MAKE cscope.out
  1113. cmd_cscope = cscope -b
  1114. cscope: FORCE
  1115. $(call cmd,cscope-file)
  1116. $(call cmd,cscope)
  1117. quiet_cmd_TAGS = MAKE $@
  1118. define cmd_TAGS
  1119. rm -f $@; \
  1120. $(call xtags,etags)
  1121. endef
  1122. TAGS: FORCE
  1123. $(call cmd,TAGS)
  1124. quiet_cmd_tags = MAKE $@
  1125. define cmd_tags
  1126. rm -f $@; \
  1127. $(call xtags,ctags)
  1128. endef
  1129. tags: FORCE
  1130. $(call cmd,tags)
  1131. # Scripts to check various things for consistency
  1132. # ---------------------------------------------------------------------------
  1133. includecheck:
  1134. find * $(RCS_FIND_IGNORE) \
  1135. -name '*.[hcS]' -type f -print | sort \
  1136. | xargs $(PERL) -w scripts/checkincludes.pl
  1137. versioncheck:
  1138. find * $(RCS_FIND_IGNORE) \
  1139. -name '*.[hcS]' -type f -print | sort \
  1140. | xargs $(PERL) -w scripts/checkversion.pl
  1141. namespacecheck:
  1142. $(PERL) $(srctree)/scripts/namespace.pl
  1143. endif #ifeq ($(config-targets),1)
  1144. endif #ifeq ($(mixed-targets),1)
  1145. PHONY += checkstack kernelrelease kernelversion
  1146. # UML needs a little special treatment here. It wants to use the host
  1147. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1148. # else wants $(ARCH), including people doing cross-builds, which means
  1149. # that $(SUBARCH) doesn't work here.
  1150. ifeq ($(ARCH), um)
  1151. CHECKSTACK_ARCH := $(SUBARCH)
  1152. else
  1153. CHECKSTACK_ARCH := $(ARCH)
  1154. endif
  1155. checkstack:
  1156. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1157. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1158. kernelrelease:
  1159. $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  1160. $(error kernelrelease not valid - run 'make prepare' to update it))
  1161. kernelversion:
  1162. @echo $(KERNELVERSION)
  1163. # Single targets
  1164. # ---------------------------------------------------------------------------
  1165. # Single targets are compatible with:
  1166. # - build whith mixed source and output
  1167. # - build with separate output dir 'make O=...'
  1168. # - external modules
  1169. #
  1170. # target-dir => where to store outputfile
  1171. # build-dir => directory in kernel source tree to use
  1172. ifeq ($(KBUILD_EXTMOD),)
  1173. build-dir = $(patsubst %/,%,$(dir $@))
  1174. target-dir = $(dir $@)
  1175. else
  1176. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1177. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1178. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1179. endif
  1180. %.s: %.c prepare scripts FORCE
  1181. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1182. %.i: %.c prepare scripts FORCE
  1183. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1184. %.o: %.c prepare scripts FORCE
  1185. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1186. %.lst: %.c prepare scripts FORCE
  1187. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1188. %.s: %.S prepare scripts FORCE
  1189. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1190. %.o: %.S prepare scripts FORCE
  1191. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1192. %.symtypes: %.c prepare scripts FORCE
  1193. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1194. # Modules
  1195. / %/: prepare scripts FORCE
  1196. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1197. $(build)=$(build-dir)
  1198. %.ko: prepare scripts FORCE
  1199. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1200. $(build)=$(build-dir) $(@:.ko=.o)
  1201. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1202. # FIXME Should go into a make.lib or something
  1203. # ===========================================================================
  1204. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1205. cmd_rmdirs = rm -rf $(rm-dirs)
  1206. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1207. cmd_rmfiles = rm -f $(rm-files)
  1208. a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
  1209. $(NOSTDINC_FLAGS) $(CPPFLAGS) \
  1210. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1211. quiet_cmd_as_o_S = AS $@
  1212. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1213. # read all saved command lines
  1214. targets := $(wildcard $(sort $(targets)))
  1215. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1216. ifneq ($(cmd_files),)
  1217. $(cmd_files): ; # Do not try to update included dependency files
  1218. include $(cmd_files)
  1219. endif
  1220. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1221. # Usage:
  1222. # $(Q)$(MAKE) $(clean)=dir
  1223. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1224. endif # skip-makefile
  1225. PHONY += FORCE
  1226. FORCE:
  1227. # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
  1228. Makefile: ;
  1229. # Declare the contents of the .PHONY variable as phony. We keep that
  1230. # information in a variable se we can use it in if_changed and friends.
  1231. .PHONY: $(PHONY)