Makefile 52 KB

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  1. VERSION = 2
  2. PATCHLEVEL = 6
  3. SUBLEVEL = 24
  4. EXTRAVERSION = -rc2
  5. NAME = Arr Matey! A Hairy Bilge Rat!
  6. # *DOCUMENTATION*
  7. # To see a list of typical targets execute "make help"
  8. # More info can be located in ./README
  9. # Comments in this file are targeted only to the developer, do not
  10. # expect to learn how to build the kernel reading this file.
  11. # Do not:
  12. # o use make's built-in rules and variables
  13. # (this increases performance and avoid hard-to-debug behavour);
  14. # o print "Entering directory ...";
  15. MAKEFLAGS += -rR --no-print-directory
  16. # We are using a recursive build, so we need to do a little thinking
  17. # to get the ordering right.
  18. #
  19. # Most importantly: sub-Makefiles should only ever modify files in
  20. # their own directory. If in some directory we have a dependency on
  21. # a file in another dir (which doesn't happen often, but it's often
  22. # unavoidable when linking the built-in.o targets which finally
  23. # turn into vmlinux), we will call a sub make in that other dir, and
  24. # after that we are sure that everything which is in that other dir
  25. # is now up to date.
  26. #
  27. # The only cases where we need to modify files which have global
  28. # effects are thus separated out and done before the recursive
  29. # descending is started. They are now explicitly listed as the
  30. # prepare rule.
  31. # To put more focus on warnings, be less verbose as default
  32. # Use 'make V=1' to see the full commands
  33. ifdef V
  34. ifeq ("$(origin V)", "command line")
  35. KBUILD_VERBOSE = $(V)
  36. endif
  37. endif
  38. ifndef KBUILD_VERBOSE
  39. KBUILD_VERBOSE = 0
  40. endif
  41. # Call a source code checker (by default, "sparse") as part of the
  42. # C compilation.
  43. #
  44. # Use 'make C=1' to enable checking of only re-compiled files.
  45. # Use 'make C=2' to enable checking of *all* source files, regardless
  46. # of whether they are re-compiled or not.
  47. #
  48. # See the file "Documentation/sparse.txt" for more details, including
  49. # where to get the "sparse" utility.
  50. ifdef C
  51. ifeq ("$(origin C)", "command line")
  52. KBUILD_CHECKSRC = $(C)
  53. endif
  54. endif
  55. ifndef KBUILD_CHECKSRC
  56. KBUILD_CHECKSRC = 0
  57. endif
  58. # Use make M=dir to specify directory of external module to build
  59. # Old syntax make ... SUBDIRS=$PWD is still supported
  60. # Setting the environment variable KBUILD_EXTMOD take precedence
  61. ifdef SUBDIRS
  62. KBUILD_EXTMOD ?= $(SUBDIRS)
  63. endif
  64. ifdef M
  65. ifeq ("$(origin M)", "command line")
  66. KBUILD_EXTMOD := $(M)
  67. endif
  68. endif
  69. # kbuild supports saving output files in a separate directory.
  70. # To locate output files in a separate directory two syntaxes are supported.
  71. # In both cases the working directory must be the root of the kernel src.
  72. # 1) O=
  73. # Use "make O=dir/to/store/output/files/"
  74. #
  75. # 2) Set KBUILD_OUTPUT
  76. # Set the environment variable KBUILD_OUTPUT to point to the directory
  77. # where the output files shall be placed.
  78. # export KBUILD_OUTPUT=dir/to/store/output/files/
  79. # make
  80. #
  81. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  82. # variable.
  83. # KBUILD_SRC is set on invocation of make in OBJ directory
  84. # KBUILD_SRC is not intended to be used by the regular user (for now)
  85. ifeq ($(KBUILD_SRC),)
  86. # OK, Make called in directory where kernel src resides
  87. # Do we want to locate output files in a separate directory?
  88. ifdef O
  89. ifeq ("$(origin O)", "command line")
  90. KBUILD_OUTPUT := $(O)
  91. endif
  92. endif
  93. # That's our default target when none is given on the command line
  94. PHONY := _all
  95. _all:
  96. ifneq ($(KBUILD_OUTPUT),)
  97. # Invoke a second make in the output directory, passing relevant variables
  98. # check that the output directory actually exists
  99. saved-output := $(KBUILD_OUTPUT)
  100. KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  101. $(if $(KBUILD_OUTPUT),, \
  102. $(error output directory "$(saved-output)" does not exist))
  103. # Check that OUTPUT directory is not the same as where we have kernel src
  104. $(if $(filter-out $(KBUILD_OUTPUT),$(shell /bin/pwd)),, \
  105. $(error Output directory (O=...) specifies kernel src dir))
  106. PHONY += $(MAKECMDGOALS) sub-make
  107. $(filter-out _all sub-make,$(MAKECMDGOALS)) _all: sub-make
  108. $(Q)@:
  109. sub-make: FORCE
  110. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  111. KBUILD_SRC=$(CURDIR) \
  112. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
  113. $(filter-out _all sub-make,$(MAKECMDGOALS))
  114. # Leave processing to above invocation of make
  115. skip-makefile := 1
  116. endif # ifneq ($(KBUILD_OUTPUT),)
  117. endif # ifeq ($(KBUILD_SRC),)
  118. # We process the rest of the Makefile if this is the final invocation of make
  119. ifeq ($(skip-makefile),)
  120. # If building an external module we do not care about the all: rule
  121. # but instead _all depend on modules
  122. PHONY += all
  123. ifeq ($(KBUILD_EXTMOD),)
  124. _all: all
  125. else
  126. _all: modules
  127. endif
  128. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  129. TOPDIR := $(srctree)
  130. # FIXME - TOPDIR is obsolete, use srctree/objtree
  131. objtree := $(CURDIR)
  132. src := $(srctree)
  133. obj := $(objtree)
  134. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  135. export srctree objtree VPATH TOPDIR
  136. # SUBARCH tells the usermode build what the underlying arch is. That is set
  137. # first, and if a usermode build is happening, the "ARCH=um" on the command
  138. # line overrides the setting of ARCH below. If a native build is happening,
  139. # then ARCH is assigned, getting whatever value it gets normally, and
  140. # SUBARCH is subsequently ignored.
  141. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  142. -e s/arm.*/arm/ -e s/sa110/arm/ \
  143. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  144. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  145. -e s/sh[234].*/sh/ )
  146. # Cross compiling and selecting different set of gcc/bin-utils
  147. # ---------------------------------------------------------------------------
  148. #
  149. # When performing cross compilation for other architectures ARCH shall be set
  150. # to the target architecture. (See arch/* for the possibilities).
  151. # ARCH can be set during invocation of make:
  152. # make ARCH=ia64
  153. # Another way is to have ARCH set in the environment.
  154. # The default ARCH is the host where make is executed.
  155. # CROSS_COMPILE specify the prefix used for all executables used
  156. # during compilation. Only gcc and related bin-utils executables
  157. # are prefixed with $(CROSS_COMPILE).
  158. # CROSS_COMPILE can be set on the command line
  159. # make CROSS_COMPILE=ia64-linux-
  160. # Alternatively CROSS_COMPILE can be set in the environment.
  161. # Default value for CROSS_COMPILE is not to prefix executables
  162. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  163. ARCH ?= $(SUBARCH)
  164. CROSS_COMPILE ?=
  165. # Architecture as present in compile.h
  166. UTS_MACHINE := $(ARCH)
  167. SRCARCH := $(ARCH)
  168. # Additional ARCH settings for x86
  169. ifeq ($(ARCH),i386)
  170. SRCARCH := x86
  171. K64BIT := n
  172. endif
  173. ifeq ($(ARCH),x86_64)
  174. SRCARCH := x86
  175. K64BIT := y
  176. endif
  177. KCONFIG_CONFIG ?= .config
  178. # SHELL used by kbuild
  179. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  180. else if [ -x /bin/bash ]; then echo /bin/bash; \
  181. else echo sh; fi ; fi)
  182. HOSTCC = gcc
  183. HOSTCXX = g++
  184. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  185. HOSTCXXFLAGS = -O2
  186. # Decide whether to build built-in, modular, or both.
  187. # Normally, just do built-in.
  188. KBUILD_MODULES :=
  189. KBUILD_BUILTIN := 1
  190. # If we have only "make modules", don't compile built-in objects.
  191. # When we're building modules with modversions, we need to consider
  192. # the built-in objects during the descend as well, in order to
  193. # make sure the checksums are up to date before we record them.
  194. ifeq ($(MAKECMDGOALS),modules)
  195. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  196. endif
  197. # If we have "make <whatever> modules", compile modules
  198. # in addition to whatever we do anyway.
  199. # Just "make" or "make all" shall build modules as well
  200. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  201. KBUILD_MODULES := 1
  202. endif
  203. ifeq ($(MAKECMDGOALS),)
  204. KBUILD_MODULES := 1
  205. endif
  206. export KBUILD_MODULES KBUILD_BUILTIN
  207. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  208. # Beautify output
  209. # ---------------------------------------------------------------------------
  210. #
  211. # Normally, we echo the whole command before executing it. By making
  212. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  213. # $(quiet) to choose other forms of output instead, e.g.
  214. #
  215. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  216. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  217. #
  218. # If $(quiet) is empty, the whole command will be printed.
  219. # If it is set to "quiet_", only the short version will be printed.
  220. # If it is set to "silent_", nothing will be printed at all, since
  221. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  222. #
  223. # A simple variant is to prefix commands with $(Q) - that's useful
  224. # for commands that shall be hidden in non-verbose mode.
  225. #
  226. # $(Q)ln $@ :<
  227. #
  228. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  229. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  230. ifeq ($(KBUILD_VERBOSE),1)
  231. quiet =
  232. Q =
  233. else
  234. quiet=quiet_
  235. Q = @
  236. endif
  237. # If the user is running make -s (silent mode), suppress echoing of
  238. # commands
  239. ifneq ($(findstring s,$(MAKEFLAGS)),)
  240. quiet=silent_
  241. endif
  242. export quiet Q KBUILD_VERBOSE
  243. # Look for make include files relative to root of kernel src
  244. MAKEFLAGS += --include-dir=$(srctree)
  245. # We need some generic definitions.
  246. include $(srctree)/scripts/Kbuild.include
  247. # Make variables (CC, etc...)
  248. AS = $(CROSS_COMPILE)as
  249. LD = $(CROSS_COMPILE)ld
  250. CC = $(CROSS_COMPILE)gcc
  251. CPP = $(CC) -E
  252. AR = $(CROSS_COMPILE)ar
  253. NM = $(CROSS_COMPILE)nm
  254. STRIP = $(CROSS_COMPILE)strip
  255. OBJCOPY = $(CROSS_COMPILE)objcopy
  256. OBJDUMP = $(CROSS_COMPILE)objdump
  257. AWK = awk
  258. GENKSYMS = scripts/genksyms/genksyms
  259. DEPMOD = /sbin/depmod
  260. KALLSYMS = scripts/kallsyms
  261. PERL = perl
  262. CHECK = sparse
  263. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
  264. MODFLAGS = -DMODULE
  265. CFLAGS_MODULE = $(MODFLAGS)
  266. AFLAGS_MODULE = $(MODFLAGS)
  267. LDFLAGS_MODULE =
  268. CFLAGS_KERNEL =
  269. AFLAGS_KERNEL =
  270. # Use LINUXINCLUDE when you must reference the include/ directory.
  271. # Needed to be compatible with the O= option
  272. LINUXINCLUDE := -Iinclude \
  273. $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
  274. -include include/linux/autoconf.h
  275. KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
  276. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  277. -fno-strict-aliasing -fno-common \
  278. -Werror-implicit-function-declaration
  279. KBUILD_AFLAGS := -D__ASSEMBLY__
  280. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  281. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  282. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  283. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  284. export ARCH SRCARCH K64BIT CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  285. export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
  286. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  287. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  288. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
  289. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  290. # When compiling out-of-tree modules, put MODVERDIR in the module
  291. # tree rather than in the kernel tree. The kernel tree might
  292. # even be read-only.
  293. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  294. # Files to ignore in find ... statements
  295. 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
  296. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  297. # ===========================================================================
  298. # Rules shared between *config targets and build targets
  299. # Basic helpers built in scripts/
  300. PHONY += scripts_basic
  301. scripts_basic:
  302. $(Q)$(MAKE) $(build)=scripts/basic
  303. # To avoid any implicit rule to kick in, define an empty command.
  304. scripts/basic/%: scripts_basic ;
  305. PHONY += outputmakefile
  306. # outputmakefile generates a Makefile in the output directory, if using a
  307. # separate output directory. This allows convenient use of make in the
  308. # output directory.
  309. outputmakefile:
  310. ifneq ($(KBUILD_SRC),)
  311. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  312. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  313. endif
  314. # To make sure we do not include .config for any of the *config targets
  315. # catch them early, and hand them over to scripts/kconfig/Makefile
  316. # It is allowed to specify more targets when calling make, including
  317. # mixing *config targets and build targets.
  318. # For example 'make oldconfig all'.
  319. # Detect when mixed targets is specified, and make a second invocation
  320. # of make so .config is not included in this case either (for *config).
  321. no-dot-config-targets := clean mrproper distclean \
  322. cscope TAGS tags help %docs check% \
  323. include/linux/version.h headers_% \
  324. kernelrelease kernelversion
  325. config-targets := 0
  326. mixed-targets := 0
  327. dot-config := 1
  328. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  329. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  330. dot-config := 0
  331. endif
  332. endif
  333. ifeq ($(KBUILD_EXTMOD),)
  334. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  335. config-targets := 1
  336. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  337. mixed-targets := 1
  338. endif
  339. endif
  340. endif
  341. ifeq ($(mixed-targets),1)
  342. # ===========================================================================
  343. # We're called with mixed targets (*config and build targets).
  344. # Handle them one by one.
  345. %:: FORCE
  346. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  347. else
  348. ifeq ($(config-targets),1)
  349. # ===========================================================================
  350. # *config targets only - make sure prerequisites are updated, and descend
  351. # in scripts/kconfig to make the *config target
  352. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  353. # KBUILD_DEFCONFIG may point out an alternative default configuration
  354. # used for 'make defconfig'
  355. include $(srctree)/arch/$(SRCARCH)/Makefile
  356. export KBUILD_DEFCONFIG
  357. config %config: scripts_basic outputmakefile FORCE
  358. $(Q)mkdir -p include/linux include/config
  359. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  360. else
  361. # ===========================================================================
  362. # Build targets only - this includes vmlinux, arch specific targets, clean
  363. # targets and others. In general all targets except *config targets.
  364. ifeq ($(KBUILD_EXTMOD),)
  365. # Additional helpers built in scripts/
  366. # Carefully list dependencies so we do not try to build scripts twice
  367. # in parallel
  368. PHONY += scripts
  369. scripts: scripts_basic include/config/auto.conf
  370. $(Q)$(MAKE) $(build)=$(@)
  371. # Objects we will link into vmlinux / subdirs we need to visit
  372. init-y := init/
  373. drivers-y := drivers/ sound/
  374. net-y := net/
  375. libs-y := lib/
  376. core-y := usr/
  377. endif # KBUILD_EXTMOD
  378. ifeq ($(dot-config),1)
  379. # Read in config
  380. -include include/config/auto.conf
  381. ifeq ($(KBUILD_EXTMOD),)
  382. # Read in dependencies to all Kconfig* files, make sure to run
  383. # oldconfig if changes are detected.
  384. -include include/config/auto.conf.cmd
  385. # To avoid any implicit rule to kick in, define an empty command
  386. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  387. # If .config is newer than include/config/auto.conf, someone tinkered
  388. # with it and forgot to run make oldconfig.
  389. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  390. # we execute the config step to be sure to catch updated Kconfig files
  391. include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  392. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  393. else
  394. # external modules needs include/linux/autoconf.h and include/config/auto.conf
  395. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  396. PHONY += include/config/auto.conf
  397. include/config/auto.conf:
  398. $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
  399. echo; \
  400. echo " ERROR: Kernel configuration is invalid."; \
  401. echo " include/linux/autoconf.h or $@ are missing."; \
  402. echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  403. echo; \
  404. /bin/false)
  405. endif # KBUILD_EXTMOD
  406. else
  407. # Dummy target needed, because used as prerequisite
  408. include/config/auto.conf: ;
  409. endif # $(dot-config)
  410. # The all: target is the default when no target is given on the
  411. # command line.
  412. # This allow a user to issue only 'make' to build a kernel including modules
  413. # Defaults vmlinux but it is usually overridden in the arch makefile
  414. all: vmlinux
  415. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  416. KBUILD_CFLAGS += -Os
  417. else
  418. KBUILD_CFLAGS += -O2
  419. endif
  420. include $(srctree)/arch/$(SRCARCH)/Makefile
  421. ifdef CONFIG_FRAME_POINTER
  422. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  423. else
  424. KBUILD_CFLAGS += -fomit-frame-pointer
  425. endif
  426. ifdef CONFIG_DEBUG_INFO
  427. KBUILD_CFLAGS += -g
  428. KBUILD_AFLAGS += -gdwarf-2
  429. endif
  430. # Force gcc to behave correct even for buggy distributions
  431. KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
  432. # arch Makefile may override CC so keep this after arch Makefile is included
  433. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  434. CHECKFLAGS += $(NOSTDINC_FLAGS)
  435. # warn about C99 declaration after statement
  436. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  437. # disable pointer signed / unsigned warnings in gcc 4.0
  438. KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  439. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  440. # But warn user when we do so
  441. warn-assign = \
  442. $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
  443. ifneq ($(KCPPFLAGS),)
  444. $(call warn-assign,CPPFLAGS)
  445. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  446. endif
  447. ifneq ($(KAFLAGS),)
  448. $(call warn-assign,AFLAGS)
  449. KBUILD_AFLAGS += $(KAFLAGS)
  450. endif
  451. ifneq ($(KCFLAGS),)
  452. $(call warn-assign,CFLAGS)
  453. KBUILD_CFLAGS += $(KCFLAGS)
  454. endif
  455. # Use --build-id when available.
  456. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  457. $(call ld-option, -Wl$(comma)--build-id,))
  458. LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  459. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  460. # Default kernel image to build when no specific target is given.
  461. # KBUILD_IMAGE may be overruled on the command line or
  462. # set in the environment
  463. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  464. # this default value
  465. export KBUILD_IMAGE ?= vmlinux
  466. #
  467. # INSTALL_PATH specifies where to place the updated kernel and system map
  468. # images. Default is /boot, but you can set it to other values
  469. export INSTALL_PATH ?= /boot
  470. #
  471. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  472. # relocations required by build roots. This is not defined in the
  473. # makefile but the argument can be passed to make if needed.
  474. #
  475. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  476. export MODLIB
  477. #
  478. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  479. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  480. # the default option --strip-debug will be used. Otherwise,
  481. # INSTALL_MOD_STRIP will used as the options to the strip command.
  482. ifdef INSTALL_MOD_STRIP
  483. ifeq ($(INSTALL_MOD_STRIP),1)
  484. mod_strip_cmd = $(STRIP) --strip-debug
  485. else
  486. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  487. endif # INSTALL_MOD_STRIP=1
  488. else
  489. mod_strip_cmd = true
  490. endif # INSTALL_MOD_STRIP
  491. export mod_strip_cmd
  492. ifeq ($(KBUILD_EXTMOD),)
  493. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  494. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  495. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  496. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  497. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  498. $(init-n) $(init-) \
  499. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  500. $(net-n) $(net-) $(libs-n) $(libs-))))
  501. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  502. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  503. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  504. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  505. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  506. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  507. libs-y := $(libs-y1) $(libs-y2)
  508. # Build vmlinux
  509. # ---------------------------------------------------------------------------
  510. # vmlinux is built from the objects selected by $(vmlinux-init) and
  511. # $(vmlinux-main). Most are built-in.o files from top-level directories
  512. # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  513. # Ordering when linking is important, and $(vmlinux-init) must be first.
  514. #
  515. # vmlinux
  516. # ^
  517. # |
  518. # +-< $(vmlinux-init)
  519. # | +--< init/version.o + more
  520. # |
  521. # +--< $(vmlinux-main)
  522. # | +--< driver/built-in.o mm/built-in.o + more
  523. # |
  524. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  525. #
  526. # vmlinux version (uname -v) cannot be updated during normal
  527. # descending-into-subdirs phase since we do not yet know if we need to
  528. # update vmlinux.
  529. # Therefore this step is delayed until just before final link of vmlinux -
  530. # except in the kallsyms case where it is done just before adding the
  531. # symbols to the kernel.
  532. #
  533. # System.map is generated to document addresses of all kernel symbols
  534. vmlinux-init := $(head-y) $(init-y)
  535. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  536. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  537. vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
  538. export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
  539. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  540. # May be overridden by arch/$(ARCH)/Makefile
  541. quiet_cmd_vmlinux__ ?= LD $@
  542. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  543. -T $(vmlinux-lds) $(vmlinux-init) \
  544. --start-group $(vmlinux-main) --end-group \
  545. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
  546. # Generate new vmlinux version
  547. quiet_cmd_vmlinux_version = GEN .version
  548. cmd_vmlinux_version = set -e; \
  549. if [ ! -r .version ]; then \
  550. rm -f .version; \
  551. echo 1 >.version; \
  552. else \
  553. mv .version .old_version; \
  554. expr 0$$(cat .old_version) + 1 >.version; \
  555. fi; \
  556. $(MAKE) $(build)=init
  557. # Generate System.map
  558. quiet_cmd_sysmap = SYSMAP
  559. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  560. # Link of vmlinux
  561. # If CONFIG_KALLSYMS is set .version is already updated
  562. # Generate System.map and verify that the content is consistent
  563. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  564. # First command is ':' to allow us to use + in front of the rule
  565. define rule_vmlinux__
  566. :
  567. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  568. $(call cmd,vmlinux__)
  569. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  570. $(Q)$(if $($(quiet)cmd_sysmap), \
  571. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  572. $(cmd_sysmap) $@ System.map; \
  573. if [ $$? -ne 0 ]; then \
  574. rm -f $@; \
  575. /bin/false; \
  576. fi;
  577. $(verify_kallsyms)
  578. endef
  579. ifdef CONFIG_KALLSYMS
  580. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  581. # It's a three stage process:
  582. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  583. # empty
  584. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  585. # the right size - vmlinux version (uname -v) is updated during this step
  586. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  587. # but due to the added section, some addresses have shifted.
  588. # From here, we generate a correct .tmp_kallsyms2.o
  589. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  590. # o Verify that the System.map from vmlinux matches the map from
  591. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  592. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  593. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  594. # temporary bypass to allow the kernel to be built while the
  595. # maintainers work out what went wrong with kallsyms.
  596. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  597. last_kallsyms := 3
  598. else
  599. last_kallsyms := 2
  600. endif
  601. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  602. define verify_kallsyms
  603. $(Q)$(if $($(quiet)cmd_sysmap), \
  604. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  605. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  606. $(Q)cmp -s System.map .tmp_System.map || \
  607. (echo Inconsistent kallsyms data; \
  608. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  609. rm .tmp_kallsyms* ; /bin/false )
  610. endef
  611. # Update vmlinux version before link
  612. # Use + in front of this rule to silent warning about make -j1
  613. # First command is ':' to allow us to use + in front of this rule
  614. cmd_ksym_ld = $(cmd_vmlinux__)
  615. define rule_ksym_ld
  616. :
  617. +$(call cmd,vmlinux_version)
  618. $(call cmd,vmlinux__)
  619. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  620. endef
  621. # Generate .S file with all kernel symbols
  622. quiet_cmd_kallsyms = KSYM $@
  623. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  624. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  625. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  626. $(call if_changed_dep,as_o_S)
  627. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  628. $(call cmd,kallsyms)
  629. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  630. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  631. $(call if_changed_rule,ksym_ld)
  632. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  633. $(call if_changed,vmlinux__)
  634. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  635. $(call if_changed,vmlinux__)
  636. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  637. $(KALLSYMS): scripts ;
  638. # Generate some data for debugging strange kallsyms problems
  639. debug_kallsyms: .tmp_map$(last_kallsyms)
  640. .tmp_map%: .tmp_vmlinux% FORCE
  641. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  642. .tmp_map3: .tmp_map2
  643. .tmp_map2: .tmp_map1
  644. endif # ifdef CONFIG_KALLSYMS
  645. # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
  646. # relevant sections renamed as per the linker script.
  647. quiet_cmd_vmlinux-modpost = LD $@
  648. cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
  649. $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
  650. $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
  651. define rule_vmlinux-modpost
  652. :
  653. +$(call cmd,vmlinux-modpost)
  654. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  655. $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
  656. endef
  657. # vmlinux image - including updated kernel symbols
  658. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
  659. ifdef CONFIG_HEADERS_CHECK
  660. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  661. endif
  662. ifdef CONFIG_SAMPLES
  663. $(Q)$(MAKE) $(build)=samples
  664. endif
  665. $(call vmlinux-modpost)
  666. $(call if_changed_rule,vmlinux__)
  667. $(Q)rm -f .old_version
  668. vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
  669. $(call if_changed_rule,vmlinux-modpost)
  670. # The actual objects are generated when descending,
  671. # make sure no implicit rule kicks in
  672. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  673. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  674. # Preset locale variables to speed up the build process. Limit locale
  675. # tweaks to this spot to avoid wrong language settings when running
  676. # make menuconfig etc.
  677. # Error messages still appears in the original language
  678. PHONY += $(vmlinux-dirs)
  679. $(vmlinux-dirs): prepare scripts
  680. $(Q)$(MAKE) $(build)=$@
  681. # Build the kernel release string
  682. #
  683. # The KERNELRELEASE value built here is stored in the file
  684. # include/config/kernel.release, and is used when executing several
  685. # make targets, such as "make install" or "make modules_install."
  686. #
  687. # The eventual kernel release string consists of the following fields,
  688. # shown in a hierarchical format to show how smaller parts are concatenated
  689. # to form the larger and final value, with values coming from places like
  690. # the Makefile, kernel config options, make command line options and/or
  691. # SCM tag information.
  692. #
  693. # $(KERNELVERSION)
  694. # $(VERSION) eg, 2
  695. # $(PATCHLEVEL) eg, 6
  696. # $(SUBLEVEL) eg, 18
  697. # $(EXTRAVERSION) eg, -rc6
  698. # $(localver-full)
  699. # $(localver)
  700. # localversion* (files without backups, containing '~')
  701. # $(CONFIG_LOCALVERSION) (from kernel config setting)
  702. # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
  703. # ./scripts/setlocalversion (SCM tag, if one exists)
  704. # $(LOCALVERSION) (from make command line if provided)
  705. #
  706. # Note how the final $(localver-auto) string is included *only* if the
  707. # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
  708. # moment, only git is supported but other SCMs can edit the script
  709. # scripts/setlocalversion and add the appropriate checks as needed.
  710. pattern = ".*/localversion[^~]*"
  711. string = $(shell cat /dev/null \
  712. `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
  713. localver = $(subst $(space),, $(string) \
  714. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  715. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  716. # and if the SCM is know a tag from the SCM is appended.
  717. # The appended tag is determined by the SCM used.
  718. #
  719. # Currently, only git is supported.
  720. # Other SCMs can edit scripts/setlocalversion and add the appropriate
  721. # checks as needed.
  722. ifdef CONFIG_LOCALVERSION_AUTO
  723. _localver-auto = $(shell $(CONFIG_SHELL) \
  724. $(srctree)/scripts/setlocalversion $(srctree))
  725. localver-auto = $(LOCALVERSION)$(_localver-auto)
  726. endif
  727. localver-full = $(localver)$(localver-auto)
  728. # Store (new) KERNELRELASE string in include/config/kernel.release
  729. kernelrelease = $(KERNELVERSION)$(localver-full)
  730. include/config/kernel.release: include/config/auto.conf FORCE
  731. $(Q)rm -f $@
  732. $(Q)echo $(kernelrelease) > $@
  733. # Things we need to do before we recursively start building the kernel
  734. # or the modules are listed in "prepare".
  735. # A multi level approach is used. prepareN is processed before prepareN-1.
  736. # archprepare is used in arch Makefiles and when processed asm symlink,
  737. # version.h and scripts_basic is processed / created.
  738. # Listed in dependency order
  739. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  740. # prepare3 is used to check if we are building in a separate output directory,
  741. # and if so do:
  742. # 1) Check that make has not been executed in the kernel src $(srctree)
  743. # 2) Create the include2 directory, used for the second asm symlink
  744. prepare3: include/config/kernel.release
  745. ifneq ($(KBUILD_SRC),)
  746. @echo ' Using $(srctree) as source for kernel'
  747. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  748. echo " $(srctree) is not clean, please run 'make mrproper'";\
  749. echo " in the '$(srctree)' directory.";\
  750. /bin/false; \
  751. fi;
  752. $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
  753. $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
  754. endif
  755. # prepare2 creates a makefile if using a separate output directory
  756. prepare2: prepare3 outputmakefile
  757. prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
  758. include/asm include/config/auto.conf
  759. $(cmd_crmodverdir)
  760. archprepare: prepare1 scripts_basic
  761. prepare0: archprepare FORCE
  762. $(Q)$(MAKE) $(build)=.
  763. $(Q)$(MAKE) $(build)=. missing-syscalls
  764. # All the preparing..
  765. prepare: prepare0
  766. # Leave this as default for preprocessing vmlinux.lds.S, which is now
  767. # done in arch/$(ARCH)/kernel/Makefile
  768. export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
  769. # The asm symlink changes when $(ARCH) changes.
  770. # Detect this and ask user to run make mrproper
  771. include/asm: FORCE
  772. $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
  773. if [ -L include/asm ]; then \
  774. if [ "$$asmlink" != "$(SRCARCH)" ]; then \
  775. echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
  776. echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
  777. exit 1; \
  778. fi; \
  779. else \
  780. echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
  781. if [ ! -d include ]; then \
  782. mkdir -p include; \
  783. fi; \
  784. ln -fsn asm-$(SRCARCH) $@; \
  785. fi
  786. # Generate some files
  787. # ---------------------------------------------------------------------------
  788. # KERNELRELEASE can change from a few different places, meaning version.h
  789. # needs to be updated, so this check is forced on all builds
  790. uts_len := 64
  791. define filechk_utsrelease.h
  792. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  793. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  794. exit 1; \
  795. fi; \
  796. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  797. endef
  798. define filechk_version.h
  799. (echo \#define LINUX_VERSION_CODE $(shell \
  800. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  801. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  802. endef
  803. include/linux/version.h: $(srctree)/Makefile FORCE
  804. $(call filechk,version.h)
  805. include/linux/utsrelease.h: include/config/kernel.release FORCE
  806. $(call filechk,utsrelease.h)
  807. # ---------------------------------------------------------------------------
  808. PHONY += depend dep
  809. depend dep:
  810. @echo '*** Warning: make $@ is unnecessary now.'
  811. # ---------------------------------------------------------------------------
  812. # Kernel headers
  813. INSTALL_HDR_PATH=$(objtree)/usr
  814. export INSTALL_HDR_PATH
  815. HDRFILTER=generic i386 x86_64
  816. HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
  817. PHONY += headers_install_all
  818. headers_install_all: include/linux/version.h scripts_basic FORCE
  819. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  820. $(Q)for arch in $(HDRARCHES); do \
  821. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
  822. done
  823. PHONY += headers_install
  824. headers_install: include/linux/version.h scripts_basic FORCE
  825. @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  826. echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
  827. exit 1 ; fi
  828. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  829. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
  830. PHONY += headers_check_all
  831. headers_check_all: headers_install_all
  832. $(Q)for arch in $(HDRARCHES); do \
  833. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
  834. done
  835. PHONY += headers_check
  836. headers_check: headers_install
  837. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
  838. # ---------------------------------------------------------------------------
  839. # Modules
  840. ifdef CONFIG_MODULES
  841. # By default, build modules as well
  842. all: modules
  843. # Build modules
  844. PHONY += modules
  845. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  846. @echo ' Building modules, stage 2.';
  847. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  848. # Target to prepare building external modules
  849. PHONY += modules_prepare
  850. modules_prepare: prepare scripts
  851. # Target to install modules
  852. PHONY += modules_install
  853. modules_install: _modinst_ _modinst_post
  854. PHONY += _modinst_
  855. _modinst_:
  856. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  857. echo "Warning: you may need to install module-init-tools"; \
  858. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  859. sleep 1; \
  860. fi
  861. @rm -rf $(MODLIB)/kernel
  862. @rm -f $(MODLIB)/source
  863. @mkdir -p $(MODLIB)/kernel
  864. @ln -s $(srctree) $(MODLIB)/source
  865. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  866. rm -f $(MODLIB)/build ; \
  867. ln -s $(objtree) $(MODLIB)/build ; \
  868. fi
  869. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  870. # This depmod is only for convenience to give the initial
  871. # boot a modules.dep even before / is mounted read-write. However the
  872. # boot script depmod is the master version.
  873. PHONY += _modinst_post
  874. _modinst_post: _modinst_
  875. $(call cmd,depmod)
  876. else # CONFIG_MODULES
  877. # Modules not configured
  878. # ---------------------------------------------------------------------------
  879. modules modules_install: FORCE
  880. @echo
  881. @echo "The present kernel configuration has modules disabled."
  882. @echo "Type 'make config' and enable loadable module support."
  883. @echo "Then build a kernel with module support enabled."
  884. @echo
  885. @exit 1
  886. endif # CONFIG_MODULES
  887. ###
  888. # Cleaning is done on three levels.
  889. # make clean Delete most generated files
  890. # Leave enough to build external modules
  891. # make mrproper Delete the current configuration, and all generated files
  892. # make distclean Remove editor backup files, patch leftover files and the like
  893. # Directories & files removed with 'make clean'
  894. CLEAN_DIRS += $(MODVERDIR)
  895. CLEAN_FILES += vmlinux System.map \
  896. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  897. # Directories & files removed with 'make mrproper'
  898. MRPROPER_DIRS += include/config include2 usr/include
  899. MRPROPER_FILES += .config .config.old include/asm .version .old_version \
  900. include/linux/autoconf.h include/linux/version.h \
  901. include/linux/utsrelease.h \
  902. Module.symvers tags TAGS cscope*
  903. # clean - Delete most, but leave enough to build external modules
  904. #
  905. clean: rm-dirs := $(CLEAN_DIRS)
  906. clean: rm-files := $(CLEAN_FILES)
  907. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
  908. PHONY += $(clean-dirs) clean archclean
  909. $(clean-dirs):
  910. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  911. clean: archclean $(clean-dirs)
  912. $(call cmd,rmdirs)
  913. $(call cmd,rmfiles)
  914. @find . $(RCS_FIND_IGNORE) \
  915. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  916. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  917. -o -name '*.symtypes' \) \
  918. -type f -print | xargs rm -f
  919. # mrproper - Delete all generated files, including .config
  920. #
  921. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  922. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  923. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  924. PHONY += $(mrproper-dirs) mrproper archmrproper
  925. $(mrproper-dirs):
  926. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  927. mrproper: clean archmrproper $(mrproper-dirs)
  928. $(call cmd,rmdirs)
  929. $(call cmd,rmfiles)
  930. # distclean
  931. #
  932. PHONY += distclean
  933. distclean: mrproper
  934. @find $(srctree) $(RCS_FIND_IGNORE) \
  935. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  936. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  937. -o -name '.*.rej' -o -size 0 \
  938. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  939. -type f -print | xargs rm -f
  940. # Packaging of the kernel to various formats
  941. # ---------------------------------------------------------------------------
  942. # rpm target kept for backward compatibility
  943. package-dir := $(srctree)/scripts/package
  944. %pkg: include/config/kernel.release FORCE
  945. $(Q)$(MAKE) $(build)=$(package-dir) $@
  946. rpm: include/config/kernel.release FORCE
  947. $(Q)$(MAKE) $(build)=$(package-dir) $@
  948. # Brief documentation of the typical targets used
  949. # ---------------------------------------------------------------------------
  950. boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
  951. boards := $(notdir $(boards))
  952. help:
  953. @echo 'Cleaning targets:'
  954. @echo ' clean - Remove most generated files but keep the config and'
  955. @echo ' enough build support to build external modules'
  956. @echo ' mrproper - Remove all generated files + config + various backup files'
  957. @echo ' distclean - mrproper + remove editor backup and patch files'
  958. @echo ''
  959. @echo 'Configuration targets:'
  960. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  961. @echo ''
  962. @echo 'Other generic targets:'
  963. @echo ' all - Build all targets marked with [*]'
  964. @echo '* vmlinux - Build the bare kernel'
  965. @echo '* modules - Build all modules'
  966. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  967. @echo ' dir/ - Build all files in dir and below'
  968. @echo ' dir/file.[ois] - Build specified target only'
  969. @echo ' dir/file.ko - Build module including final link'
  970. @echo ' rpm - Build a kernel as an RPM package'
  971. @echo ' tags/TAGS - Generate tags file for editors'
  972. @echo ' cscope - Generate cscope index'
  973. @echo ' kernelrelease - Output the release version string'
  974. @echo ' kernelversion - Output the version stored in Makefile'
  975. @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  976. echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  977. echo ' (default: $(INSTALL_HDR_PATH))'; \
  978. fi
  979. @echo ''
  980. @echo 'Static analysers'
  981. @echo ' checkstack - Generate a list of stack hogs'
  982. @echo ' namespacecheck - Name space analysis on compiled kernel'
  983. @echo ' export_report - List the usages of all exported symbols'
  984. @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  985. echo ' headers_check - Sanity check on exported headers'; \
  986. fi
  987. @echo ''
  988. @echo 'Kernel packaging:'
  989. @$(MAKE) $(build)=$(package-dir) help
  990. @echo ''
  991. @echo 'Documentation targets:'
  992. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  993. @echo ''
  994. @echo 'Architecture specific targets ($(ARCH)):'
  995. @$(if $(archhelp),$(archhelp),\
  996. echo ' No architecture specific help defined for $(ARCH)')
  997. @echo ''
  998. @$(if $(boards), \
  999. $(foreach b, $(boards), \
  1000. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  1001. echo '')
  1002. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1003. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  1004. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  1005. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  1006. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  1007. @echo ''
  1008. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  1009. @echo 'For further info see the ./README file'
  1010. # Documentation targets
  1011. # ---------------------------------------------------------------------------
  1012. %docs: scripts_basic FORCE
  1013. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  1014. else # KBUILD_EXTMOD
  1015. ###
  1016. # External module support.
  1017. # When building external modules the kernel used as basis is considered
  1018. # read-only, and no consistency checks are made and the make
  1019. # system is not used on the basis kernel. If updates are required
  1020. # in the basis kernel ordinary make commands (without M=...) must
  1021. # be used.
  1022. #
  1023. # The following are the only valid targets when building external
  1024. # modules.
  1025. # make M=dir clean Delete all automatically generated files
  1026. # make M=dir modules Make all modules in specified dir
  1027. # make M=dir Same as 'make M=dir modules'
  1028. # make M=dir modules_install
  1029. # Install the modules built in the module directory
  1030. # Assumes install directory is already created
  1031. # We are always building modules
  1032. KBUILD_MODULES := 1
  1033. PHONY += crmodverdir
  1034. crmodverdir:
  1035. $(cmd_crmodverdir)
  1036. PHONY += $(objtree)/Module.symvers
  1037. $(objtree)/Module.symvers:
  1038. @test -e $(objtree)/Module.symvers || ( \
  1039. echo; \
  1040. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1041. echo " is missing; modules will have no dependencies and modversions."; \
  1042. echo )
  1043. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1044. PHONY += $(module-dirs) modules
  1045. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1046. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1047. modules: $(module-dirs)
  1048. @echo ' Building modules, stage 2.';
  1049. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1050. PHONY += modules_install
  1051. modules_install: _emodinst_ _emodinst_post
  1052. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1053. PHONY += _emodinst_
  1054. _emodinst_:
  1055. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1056. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1057. PHONY += _emodinst_post
  1058. _emodinst_post: _emodinst_
  1059. $(call cmd,depmod)
  1060. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1061. PHONY += $(clean-dirs) clean
  1062. $(clean-dirs):
  1063. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1064. clean: rm-dirs := $(MODVERDIR)
  1065. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1066. clean: $(clean-dirs)
  1067. $(call cmd,rmdirs)
  1068. $(call cmd,rmfiles)
  1069. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  1070. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1071. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  1072. -type f -print | xargs rm -f
  1073. help:
  1074. @echo ' Building external modules.'
  1075. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1076. @echo ''
  1077. @echo ' modules - default target, build the module(s)'
  1078. @echo ' modules_install - install the module'
  1079. @echo ' clean - remove generated files in module directory only'
  1080. @echo ''
  1081. # Dummies...
  1082. PHONY += prepare scripts
  1083. prepare: ;
  1084. scripts: ;
  1085. endif # KBUILD_EXTMOD
  1086. # Generate tags for editors
  1087. # ---------------------------------------------------------------------------
  1088. #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
  1089. #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
  1090. #Adding $(srctree) adds about 20M on i386 to the size of the output file!
  1091. ifeq ($(src),$(obj))
  1092. __srctree =
  1093. else
  1094. __srctree = $(srctree)/
  1095. endif
  1096. ifeq ($(ALLSOURCE_ARCHS),)
  1097. ifeq ($(ARCH),um)
  1098. ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
  1099. else
  1100. ALLINCLUDE_ARCHS := $(SRCARCH)
  1101. endif
  1102. else
  1103. #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
  1104. ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
  1105. endif
  1106. # Take care of arch/x86
  1107. ifeq ($(ARCH), $(SRCARCH))
  1108. ALLSOURCE_ARCHS := $(ARCH)
  1109. else
  1110. ALLSOURCE_ARCHS := $(ARCH) $(SRCARCH)
  1111. endif
  1112. define find-sources
  1113. ( for arch in $(ALLSOURCE_ARCHS) ; do \
  1114. find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
  1115. -name $1 -print; \
  1116. done ; \
  1117. find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
  1118. -name $1 -print; \
  1119. find $(__srctree)include $(RCS_FIND_IGNORE) \
  1120. \( -name config -o -name 'asm-*' \) -prune \
  1121. -o -name $1 -print; \
  1122. for arch in $(ALLINCLUDE_ARCHS) ; do \
  1123. find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
  1124. -name $1 -print; \
  1125. done ; \
  1126. find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
  1127. -name $1 -print; \
  1128. find $(__srctree) $(RCS_FIND_IGNORE) \
  1129. \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
  1130. -name $1 -print; \
  1131. )
  1132. endef
  1133. define all-sources
  1134. $(call find-sources,'*.[chS]')
  1135. endef
  1136. define all-kconfigs
  1137. $(call find-sources,'Kconfig*')
  1138. endef
  1139. define all-defconfigs
  1140. $(call find-sources,'defconfig')
  1141. endef
  1142. define xtags
  1143. if $1 --version 2>&1 | grep -iq exuberant; then \
  1144. $(all-sources) | xargs $1 -a \
  1145. -I __initdata,__exitdata,__acquires,__releases \
  1146. -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
  1147. --extra=+f --c-kinds=+px \
  1148. --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
  1149. $(all-kconfigs) | xargs $1 -a \
  1150. --langdef=kconfig \
  1151. --language-force=kconfig \
  1152. --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
  1153. $(all-defconfigs) | xargs -r $1 -a \
  1154. --langdef=dotconfig \
  1155. --language-force=dotconfig \
  1156. --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
  1157. elif $1 --version 2>&1 | grep -iq emacs; then \
  1158. $(all-sources) | xargs $1 -a; \
  1159. $(all-kconfigs) | xargs $1 -a \
  1160. --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
  1161. $(all-defconfigs) | xargs -r $1 -a \
  1162. --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
  1163. else \
  1164. $(all-sources) | xargs $1 -a; \
  1165. fi
  1166. endef
  1167. quiet_cmd_cscope-file = FILELST cscope.files
  1168. cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
  1169. quiet_cmd_cscope = MAKE cscope.out
  1170. cmd_cscope = cscope -b
  1171. cscope: FORCE
  1172. $(call cmd,cscope-file)
  1173. $(call cmd,cscope)
  1174. quiet_cmd_TAGS = MAKE $@
  1175. define cmd_TAGS
  1176. rm -f $@; \
  1177. $(call xtags,etags)
  1178. endef
  1179. TAGS: FORCE
  1180. $(call cmd,TAGS)
  1181. quiet_cmd_tags = MAKE $@
  1182. define cmd_tags
  1183. rm -f $@; \
  1184. $(call xtags,ctags)
  1185. endef
  1186. tags: FORCE
  1187. $(call cmd,tags)
  1188. # Scripts to check various things for consistency
  1189. # ---------------------------------------------------------------------------
  1190. includecheck:
  1191. find * $(RCS_FIND_IGNORE) \
  1192. -name '*.[hcS]' -type f -print | sort \
  1193. | xargs $(PERL) -w scripts/checkincludes.pl
  1194. versioncheck:
  1195. find * $(RCS_FIND_IGNORE) \
  1196. -name '*.[hcS]' -type f -print | sort \
  1197. | xargs $(PERL) -w scripts/checkversion.pl
  1198. namespacecheck:
  1199. $(PERL) $(srctree)/scripts/namespace.pl
  1200. export_report:
  1201. $(PERL) $(srctree)/scripts/export_report.pl
  1202. endif #ifeq ($(config-targets),1)
  1203. endif #ifeq ($(mixed-targets),1)
  1204. PHONY += checkstack kernelrelease kernelversion
  1205. # UML needs a little special treatment here. It wants to use the host
  1206. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1207. # else wants $(ARCH), including people doing cross-builds, which means
  1208. # that $(SUBARCH) doesn't work here.
  1209. ifeq ($(ARCH), um)
  1210. CHECKSTACK_ARCH := $(SUBARCH)
  1211. else
  1212. CHECKSTACK_ARCH := $(ARCH)
  1213. endif
  1214. checkstack:
  1215. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1216. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1217. kernelrelease:
  1218. $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  1219. $(error kernelrelease not valid - run 'make prepare' to update it))
  1220. kernelversion:
  1221. @echo $(KERNELVERSION)
  1222. # Single targets
  1223. # ---------------------------------------------------------------------------
  1224. # Single targets are compatible with:
  1225. # - build whith mixed source and output
  1226. # - build with separate output dir 'make O=...'
  1227. # - external modules
  1228. #
  1229. # target-dir => where to store outputfile
  1230. # build-dir => directory in kernel source tree to use
  1231. ifeq ($(KBUILD_EXTMOD),)
  1232. build-dir = $(patsubst %/,%,$(dir $@))
  1233. target-dir = $(dir $@)
  1234. else
  1235. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1236. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1237. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1238. endif
  1239. %.s: %.c prepare scripts FORCE
  1240. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1241. %.i: %.c prepare scripts FORCE
  1242. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1243. %.o: %.c prepare scripts FORCE
  1244. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1245. %.lst: %.c prepare scripts FORCE
  1246. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1247. %.s: %.S prepare scripts FORCE
  1248. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1249. %.o: %.S prepare scripts FORCE
  1250. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1251. %.symtypes: %.c prepare scripts FORCE
  1252. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1253. # Modules
  1254. / %/: prepare scripts FORCE
  1255. $(cmd_crmodverdir)
  1256. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1257. $(build)=$(build-dir)
  1258. %.ko: prepare scripts FORCE
  1259. $(cmd_crmodverdir)
  1260. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1261. $(build)=$(build-dir) $(@:.ko=.o)
  1262. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1263. # FIXME Should go into a make.lib or something
  1264. # ===========================================================================
  1265. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1266. cmd_rmdirs = rm -rf $(rm-dirs)
  1267. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1268. cmd_rmfiles = rm -f $(rm-files)
  1269. # Run depmod only is we have System.map and depmod is executable
  1270. # and we build for the host arch
  1271. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1272. cmd_depmod = \
  1273. if [ -r System.map -a -x $(DEPMOD) ]; then \
  1274. $(DEPMOD) -ae -F System.map \
  1275. $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
  1276. $(KERNELRELEASE); \
  1277. fi
  1278. # Create temporary dir for module support files
  1279. # clean it up only when building all modules
  1280. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1281. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1282. a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
  1283. $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
  1284. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1285. quiet_cmd_as_o_S = AS $@
  1286. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1287. # read all saved command lines
  1288. targets := $(wildcard $(sort $(targets)))
  1289. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1290. ifneq ($(cmd_files),)
  1291. $(cmd_files): ; # Do not try to update included dependency files
  1292. include $(cmd_files)
  1293. endif
  1294. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1295. # Usage:
  1296. # $(Q)$(MAKE) $(clean)=dir
  1297. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1298. endif # skip-makefile
  1299. PHONY += FORCE
  1300. FORCE:
  1301. # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
  1302. Makefile: ;
  1303. # Declare the contents of the .PHONY variable as phony. We keep that
  1304. # information in a variable se we can use it in if_changed and friends.
  1305. .PHONY: $(PHONY)