Makefile 44 KB

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  1. VERSION = 2
  2. PATCHLEVEL = 6
  3. SUBLEVEL = 15
  4. EXTRAVERSION =
  5. NAME=Sliding Snow Leopard
  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 print "Entering directory ..."
  12. MAKEFLAGS += --no-print-directory
  13. # We are using a recursive build, so we need to do a little thinking
  14. # to get the ordering right.
  15. #
  16. # Most importantly: sub-Makefiles should only ever modify files in
  17. # their own directory. If in some directory we have a dependency on
  18. # a file in another dir (which doesn't happen often, but it's often
  19. # unavoidable when linking the built-in.o targets which finally
  20. # turn into vmlinux), we will call a sub make in that other dir, and
  21. # after that we are sure that everything which is in that other dir
  22. # is now up to date.
  23. #
  24. # The only cases where we need to modify files which have global
  25. # effects are thus separated out and done before the recursive
  26. # descending is started. They are now explicitly listed as the
  27. # prepare rule.
  28. # To put more focus on warnings, be less verbose as default
  29. # Use 'make V=1' to see the full commands
  30. ifdef V
  31. ifeq ("$(origin V)", "command line")
  32. KBUILD_VERBOSE = $(V)
  33. endif
  34. endif
  35. ifndef KBUILD_VERBOSE
  36. KBUILD_VERBOSE = 0
  37. endif
  38. # Call sparse as part of compilation of C files
  39. # Use 'make C=1' to enable sparse checking
  40. ifdef C
  41. ifeq ("$(origin C)", "command line")
  42. KBUILD_CHECKSRC = $(C)
  43. endif
  44. endif
  45. ifndef KBUILD_CHECKSRC
  46. KBUILD_CHECKSRC = 0
  47. endif
  48. # Use make M=dir to specify directory of external module to build
  49. # Old syntax make ... SUBDIRS=$PWD is still supported
  50. # Setting the environment variable KBUILD_EXTMOD take precedence
  51. ifdef SUBDIRS
  52. KBUILD_EXTMOD ?= $(SUBDIRS)
  53. endif
  54. ifdef M
  55. ifeq ("$(origin M)", "command line")
  56. KBUILD_EXTMOD := $(M)
  57. endif
  58. endif
  59. # kbuild supports saving output files in a separate directory.
  60. # To locate output files in a separate directory two syntaxes are supported.
  61. # In both cases the working directory must be the root of the kernel src.
  62. # 1) O=
  63. # Use "make O=dir/to/store/output/files/"
  64. #
  65. # 2) Set KBUILD_OUTPUT
  66. # Set the environment variable KBUILD_OUTPUT to point to the directory
  67. # where the output files shall be placed.
  68. # export KBUILD_OUTPUT=dir/to/store/output/files/
  69. # make
  70. #
  71. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  72. # variable.
  73. # KBUILD_SRC is set on invocation of make in OBJ directory
  74. # KBUILD_SRC is not intended to be used by the regular user (for now)
  75. ifeq ($(KBUILD_SRC),)
  76. # OK, Make called in directory where kernel src resides
  77. # Do we want to locate output files in a separate directory?
  78. ifdef O
  79. ifeq ("$(origin O)", "command line")
  80. KBUILD_OUTPUT := $(O)
  81. endif
  82. endif
  83. # That's our default target when none is given on the command line
  84. .PHONY: _all
  85. _all:
  86. ifneq ($(KBUILD_OUTPUT),)
  87. # Invoke a second make in the output directory, passing relevant variables
  88. # check that the output directory actually exists
  89. saved-output := $(KBUILD_OUTPUT)
  90. KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  91. $(if $(KBUILD_OUTPUT),, \
  92. $(error output directory "$(saved-output)" does not exist))
  93. .PHONY: $(MAKECMDGOALS) cdbuilddir
  94. $(MAKECMDGOALS) _all: cdbuilddir
  95. cdbuilddir:
  96. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  97. KBUILD_SRC=$(CURDIR) \
  98. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $(MAKECMDGOALS)
  99. # Leave processing to above invocation of make
  100. skip-makefile := 1
  101. endif # ifneq ($(KBUILD_OUTPUT),)
  102. endif # ifeq ($(KBUILD_SRC),)
  103. # We process the rest of the Makefile if this is the final invocation of make
  104. ifeq ($(skip-makefile),)
  105. # If building an external module we do not care about the all: rule
  106. # but instead _all depend on modules
  107. .PHONY: all
  108. ifeq ($(KBUILD_EXTMOD),)
  109. _all: all
  110. else
  111. _all: modules
  112. endif
  113. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  114. TOPDIR := $(srctree)
  115. # FIXME - TOPDIR is obsolete, use srctree/objtree
  116. objtree := $(CURDIR)
  117. src := $(srctree)
  118. obj := $(objtree)
  119. VPATH := $(srctree)
  120. export srctree objtree VPATH TOPDIR
  121. # SUBARCH tells the usermode build what the underlying arch is. That is set
  122. # first, and if a usermode build is happening, the "ARCH=um" on the command
  123. # line overrides the setting of ARCH below. If a native build is happening,
  124. # then ARCH is assigned, getting whatever value it gets normally, and
  125. # SUBARCH is subsequently ignored.
  126. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  127. -e s/arm.*/arm/ -e s/sa110/arm/ \
  128. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  129. -e s/ppc64/powerpc/ )
  130. # Cross compiling and selecting different set of gcc/bin-utils
  131. # ---------------------------------------------------------------------------
  132. #
  133. # When performing cross compilation for other architectures ARCH shall be set
  134. # to the target architecture. (See arch/* for the possibilities).
  135. # ARCH can be set during invocation of make:
  136. # make ARCH=ia64
  137. # Another way is to have ARCH set in the environment.
  138. # The default ARCH is the host where make is executed.
  139. # CROSS_COMPILE specify the prefix used for all executables used
  140. # during compilation. Only gcc and related bin-utils executables
  141. # are prefixed with $(CROSS_COMPILE).
  142. # CROSS_COMPILE can be set on the command line
  143. # make CROSS_COMPILE=ia64-linux-
  144. # Alternatively CROSS_COMPILE can be set in the environment.
  145. # Default value for CROSS_COMPILE is not to prefix executables
  146. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  147. ARCH ?= $(SUBARCH)
  148. CROSS_COMPILE ?=
  149. # Architecture as present in compile.h
  150. UTS_MACHINE := $(ARCH)
  151. # SHELL used by kbuild
  152. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  153. else if [ -x /bin/bash ]; then echo /bin/bash; \
  154. else echo sh; fi ; fi)
  155. HOSTCC = gcc
  156. HOSTCXX = g++
  157. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  158. HOSTCXXFLAGS = -O2
  159. # Decide whether to build built-in, modular, or both.
  160. # Normally, just do built-in.
  161. KBUILD_MODULES :=
  162. KBUILD_BUILTIN := 1
  163. # If we have only "make modules", don't compile built-in objects.
  164. # When we're building modules with modversions, we need to consider
  165. # the built-in objects during the descend as well, in order to
  166. # make sure the checksums are uptodate before we record them.
  167. ifeq ($(MAKECMDGOALS),modules)
  168. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  169. endif
  170. # If we have "make <whatever> modules", compile modules
  171. # in addition to whatever we do anyway.
  172. # Just "make" or "make all" shall build modules as well
  173. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  174. KBUILD_MODULES := 1
  175. endif
  176. ifeq ($(MAKECMDGOALS),)
  177. KBUILD_MODULES := 1
  178. endif
  179. export KBUILD_MODULES KBUILD_BUILTIN
  180. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  181. # Beautify output
  182. # ---------------------------------------------------------------------------
  183. #
  184. # Normally, we echo the whole command before executing it. By making
  185. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  186. # $(quiet) to choose other forms of output instead, e.g.
  187. #
  188. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  189. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  190. #
  191. # If $(quiet) is empty, the whole command will be printed.
  192. # If it is set to "quiet_", only the short version will be printed.
  193. # If it is set to "silent_", nothing wil be printed at all, since
  194. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  195. #
  196. # A simple variant is to prefix commands with $(Q) - that's useful
  197. # for commands that shall be hidden in non-verbose mode.
  198. #
  199. # $(Q)ln $@ :<
  200. #
  201. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  202. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  203. ifeq ($(KBUILD_VERBOSE),1)
  204. quiet =
  205. Q =
  206. else
  207. quiet=quiet_
  208. Q = @
  209. endif
  210. # If the user is running make -s (silent mode), suppress echoing of
  211. # commands
  212. ifneq ($(findstring s,$(MAKEFLAGS)),)
  213. quiet=silent_
  214. endif
  215. export quiet Q KBUILD_VERBOSE
  216. ######
  217. # cc support functions to be used (only) in arch/$(ARCH)/Makefile
  218. # See documentation in Documentation/kbuild/makefiles.txt
  219. # cc-option
  220. # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
  221. cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
  222. > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
  223. # cc-option-yn
  224. # Usage: flag := $(call cc-option-yn, -march=winchip-c6)
  225. cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
  226. > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
  227. # cc-option-align
  228. # Prefix align with either -falign or -malign
  229. cc-option-align = $(subst -functions=0,,\
  230. $(call cc-option,-falign-functions=0,-malign-functions=0))
  231. # cc-version
  232. # Usage gcc-ver := $(call cc-version $(CC))
  233. cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
  234. $(if $(1), $(1), $(CC)))
  235. # Look for make include files relative to root of kernel src
  236. MAKEFLAGS += --include-dir=$(srctree)
  237. # We need some generic definitions
  238. include $(srctree)/scripts/Kbuild.include
  239. # For maximum performance (+ possibly random breakage, uncomment
  240. # the following)
  241. #MAKEFLAGS += -rR
  242. # Make variables (CC, etc...)
  243. AS = $(CROSS_COMPILE)as
  244. LD = $(CROSS_COMPILE)ld
  245. CC = $(CROSS_COMPILE)gcc
  246. CPP = $(CC) -E
  247. AR = $(CROSS_COMPILE)ar
  248. NM = $(CROSS_COMPILE)nm
  249. STRIP = $(CROSS_COMPILE)strip
  250. OBJCOPY = $(CROSS_COMPILE)objcopy
  251. OBJDUMP = $(CROSS_COMPILE)objdump
  252. AWK = awk
  253. GENKSYMS = scripts/genksyms/genksyms
  254. DEPMOD = /sbin/depmod
  255. KALLSYMS = scripts/kallsyms
  256. PERL = perl
  257. CHECK = sparse
  258. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
  259. MODFLAGS = -DMODULE
  260. CFLAGS_MODULE = $(MODFLAGS)
  261. AFLAGS_MODULE = $(MODFLAGS)
  262. LDFLAGS_MODULE = -r
  263. CFLAGS_KERNEL =
  264. AFLAGS_KERNEL =
  265. # Use LINUXINCLUDE when you must reference the include/ directory.
  266. # Needed to be compatible with the O= option
  267. LINUXINCLUDE := -Iinclude \
  268. $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
  269. -include include/linux/autoconf.h
  270. CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
  271. CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  272. -fno-strict-aliasing -fno-common \
  273. -ffreestanding
  274. AFLAGS := -D__ASSEMBLY__
  275. # Read KERNELRELEASE from .kernelrelease (if it exists)
  276. KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
  277. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  278. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
  279. ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
  280. CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
  281. HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  282. export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  283. export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
  284. export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  285. # When compiling out-of-tree modules, put MODVERDIR in the module
  286. # tree rather than in the kernel tree. The kernel tree might
  287. # even be read-only.
  288. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  289. # Files to ignore in find ... statements
  290. 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
  291. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  292. # ===========================================================================
  293. # Rules shared between *config targets and build targets
  294. # Basic helpers built in scripts/
  295. .PHONY: scripts_basic
  296. scripts_basic:
  297. $(Q)$(MAKE) $(build)=scripts/basic
  298. # To avoid any implicit rule to kick in, define an empty command.
  299. scripts/basic/%: scripts_basic ;
  300. .PHONY: outputmakefile
  301. # outputmakefile generate a Makefile to be placed in output directory, if
  302. # using a seperate output directory. This allows convinient use
  303. # of make in output directory
  304. outputmakefile:
  305. $(Q)if test ! $(srctree) -ef $(objtree); then \
  306. $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  307. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
  308. > $(objtree)/Makefile; \
  309. echo ' GEN $(objtree)/Makefile'; \
  310. fi
  311. # To make sure we do not include .config for any of the *config targets
  312. # catch them early, and hand them over to scripts/kconfig/Makefile
  313. # It is allowed to specify more targets when calling make, including
  314. # mixing *config targets and build targets.
  315. # For example 'make oldconfig all'.
  316. # Detect when mixed targets is specified, and make a second invocation
  317. # of make so .config is not included in this case either (for *config).
  318. no-dot-config-targets := clean mrproper distclean \
  319. cscope TAGS tags help %docs check%
  320. config-targets := 0
  321. mixed-targets := 0
  322. dot-config := 1
  323. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  324. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  325. dot-config := 0
  326. endif
  327. endif
  328. ifeq ($(KBUILD_EXTMOD),)
  329. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  330. config-targets := 1
  331. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  332. mixed-targets := 1
  333. endif
  334. endif
  335. endif
  336. ifeq ($(mixed-targets),1)
  337. # ===========================================================================
  338. # We're called with mixed targets (*config and build targets).
  339. # Handle them one by one.
  340. %:: FORCE
  341. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  342. else
  343. ifeq ($(config-targets),1)
  344. # ===========================================================================
  345. # *config targets only - make sure prerequisites are updated, and descend
  346. # in scripts/kconfig to make the *config target
  347. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  348. # KBUILD_DEFCONFIG may point out an alternative default configuration
  349. # used for 'make defconfig'
  350. include $(srctree)/arch/$(ARCH)/Makefile
  351. export KBUILD_DEFCONFIG
  352. config %config: scripts_basic outputmakefile FORCE
  353. $(Q)mkdir -p include/linux
  354. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  355. $(Q)$(MAKE) .kernelrelease
  356. else
  357. # ===========================================================================
  358. # Build targets only - this includes vmlinux, arch specific targets, clean
  359. # targets and others. In general all targets except *config targets.
  360. ifeq ($(KBUILD_EXTMOD),)
  361. # Additional helpers built in scripts/
  362. # Carefully list dependencies so we do not try to build scripts twice
  363. # in parrallel
  364. .PHONY: scripts
  365. scripts: scripts_basic include/config/MARKER
  366. $(Q)$(MAKE) $(build)=$(@)
  367. scripts_basic: include/linux/autoconf.h
  368. # Objects we will link into vmlinux / subdirs we need to visit
  369. init-y := init/
  370. drivers-y := drivers/ sound/
  371. net-y := net/
  372. libs-y := lib/
  373. core-y := usr/
  374. endif # KBUILD_EXTMOD
  375. ifeq ($(dot-config),1)
  376. # In this section, we need .config
  377. # Read in dependencies to all Kconfig* files, make sure to run
  378. # oldconfig if changes are detected.
  379. -include .kconfig.d
  380. include .config
  381. # If .config needs to be updated, it will be done via the dependency
  382. # that autoconf has on .config.
  383. # To avoid any implicit rule to kick in, define an empty command
  384. .config .kconfig.d: ;
  385. # If .config is newer than include/linux/autoconf.h, someone tinkered
  386. # with it and forgot to run make oldconfig.
  387. # If kconfig.d is missing then we are probarly in a cleaned tree so
  388. # we execute the config step to be sure to catch updated Kconfig files
  389. include/linux/autoconf.h: .kconfig.d .config
  390. $(Q)mkdir -p include/linux
  391. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  392. else
  393. # Dummy target needed, because used as prerequisite
  394. include/linux/autoconf.h: ;
  395. endif
  396. # The all: target is the default when no target is given on the
  397. # command line.
  398. # This allow a user to issue only 'make' to build a kernel including modules
  399. # Defaults vmlinux but it is usually overriden in the arch makefile
  400. all: vmlinux
  401. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  402. CFLAGS += -Os
  403. else
  404. CFLAGS += -O2
  405. endif
  406. #Add align options if CONFIG_CC_* is not equal to 0
  407. add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
  408. CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
  409. CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
  410. CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
  411. CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
  412. ifdef CONFIG_FRAME_POINTER
  413. CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
  414. else
  415. CFLAGS += -fomit-frame-pointer
  416. endif
  417. ifdef CONFIG_DEBUG_INFO
  418. CFLAGS += -g
  419. endif
  420. include $(srctree)/arch/$(ARCH)/Makefile
  421. # arch Makefile may override CC so keep this after arch Makefile is included
  422. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  423. CHECKFLAGS += $(NOSTDINC_FLAGS)
  424. # warn about C99 declaration after statement
  425. CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  426. # disable pointer signedness warnings in gcc 4.0
  427. CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  428. # Default kernel image to build when no specific target is given.
  429. # KBUILD_IMAGE may be overruled on the commandline or
  430. # set in the environment
  431. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  432. # this default value
  433. export KBUILD_IMAGE ?= vmlinux
  434. #
  435. # INSTALL_PATH specifies where to place the updated kernel and system map
  436. # images. Default is /boot, but you can set it to other values
  437. export INSTALL_PATH ?= /boot
  438. #
  439. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  440. # relocations required by build roots. This is not defined in the
  441. # makefile but the arguement can be passed to make if needed.
  442. #
  443. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  444. export MODLIB
  445. ifeq ($(KBUILD_EXTMOD),)
  446. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  447. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  448. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  449. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  450. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  451. $(init-n) $(init-) \
  452. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  453. $(net-n) $(net-) $(libs-n) $(libs-))))
  454. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  455. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  456. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  457. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  458. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  459. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  460. libs-y := $(libs-y1) $(libs-y2)
  461. # Build vmlinux
  462. # ---------------------------------------------------------------------------
  463. # vmlinux is build from the objects selected by $(vmlinux-init) and
  464. # $(vmlinux-main). Most are built-in.o files from top-level directories
  465. # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
  466. # Ordering when linking is important, and $(vmlinux-init) must be first.
  467. #
  468. # vmlinux
  469. # ^
  470. # |
  471. # +-< $(vmlinux-init)
  472. # | +--< init/version.o + more
  473. # |
  474. # +--< $(vmlinux-main)
  475. # | +--< driver/built-in.o mm/built-in.o + more
  476. # |
  477. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  478. #
  479. # vmlinux version (uname -v) cannot be updated during normal
  480. # descending-into-subdirs phase since we do not yet know if we need to
  481. # update vmlinux.
  482. # Therefore this step is delayed until just before final link of vmlinux -
  483. # except in the kallsyms case where it is done just before adding the
  484. # symbols to the kernel.
  485. #
  486. # System.map is generated to document addresses of all kernel symbols
  487. vmlinux-init := $(head-y) $(init-y)
  488. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  489. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  490. vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
  491. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  492. # May be overridden by arch/$(ARCH)/Makefile
  493. quiet_cmd_vmlinux__ ?= LD $@
  494. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  495. -T $(vmlinux-lds) $(vmlinux-init) \
  496. --start-group $(vmlinux-main) --end-group \
  497. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
  498. # Generate new vmlinux version
  499. quiet_cmd_vmlinux_version = GEN .version
  500. cmd_vmlinux_version = set -e; \
  501. if [ ! -r .version ]; then \
  502. rm -f .version; \
  503. echo 1 >.version; \
  504. else \
  505. mv .version .old_version; \
  506. expr 0$$(cat .old_version) + 1 >.version; \
  507. fi; \
  508. $(MAKE) $(build)=init
  509. # Generate System.map
  510. quiet_cmd_sysmap = SYSMAP
  511. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  512. # Link of vmlinux
  513. # If CONFIG_KALLSYMS is set .version is already updated
  514. # Generate System.map and verify that the content is consistent
  515. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  516. # First command is ':' to allow us to use + in front of the rule
  517. define rule_vmlinux__
  518. :
  519. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  520. $(call cmd,vmlinux__)
  521. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  522. $(Q)$(if $($(quiet)cmd_sysmap), \
  523. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  524. $(cmd_sysmap) $@ System.map; \
  525. if [ $$? -ne 0 ]; then \
  526. rm -f $@; \
  527. /bin/false; \
  528. fi;
  529. $(verify_kallsyms)
  530. endef
  531. ifdef CONFIG_KALLSYMS
  532. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  533. # It's a three stage process:
  534. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  535. # empty
  536. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  537. # the right size - vmlinux version (uname -v) is updated during this step
  538. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  539. # but due to the added section, some addresses have shifted.
  540. # From here, we generate a correct .tmp_kallsyms2.o
  541. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  542. # o Verify that the System.map from vmlinux matches the map from
  543. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  544. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  545. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  546. # temporary bypass to allow the kernel to be built while the
  547. # maintainers work out what went wrong with kallsyms.
  548. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  549. last_kallsyms := 3
  550. else
  551. last_kallsyms := 2
  552. endif
  553. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  554. define verify_kallsyms
  555. $(Q)$(if $($(quiet)cmd_sysmap), \
  556. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  557. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  558. $(Q)cmp -s System.map .tmp_System.map || \
  559. (echo Inconsistent kallsyms data; \
  560. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  561. rm .tmp_kallsyms* ; /bin/false )
  562. endef
  563. # Update vmlinux version before link
  564. # Use + in front of this rule to silent warning about make -j1
  565. # First command is ':' to allow us to use + in front of this rule
  566. cmd_ksym_ld = $(cmd_vmlinux__)
  567. define rule_ksym_ld
  568. :
  569. +$(call cmd,vmlinux_version)
  570. $(call cmd,vmlinux__)
  571. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  572. endef
  573. # Generate .S file with all kernel symbols
  574. quiet_cmd_kallsyms = KSYM $@
  575. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  576. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  577. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  578. $(call if_changed_dep,as_o_S)
  579. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  580. $(call cmd,kallsyms)
  581. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  582. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  583. $(call if_changed_rule,ksym_ld)
  584. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  585. $(call if_changed,vmlinux__)
  586. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  587. $(call if_changed,vmlinux__)
  588. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  589. $(KALLSYMS): scripts ;
  590. # Generate some data for debugging strange kallsyms problems
  591. debug_kallsyms: .tmp_map$(last_kallsyms)
  592. .tmp_map%: .tmp_vmlinux% FORCE
  593. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  594. .tmp_map3: .tmp_map2
  595. .tmp_map2: .tmp_map1
  596. endif # ifdef CONFIG_KALLSYMS
  597. # vmlinux image - including updated kernel symbols
  598. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
  599. $(call if_changed_rule,vmlinux__)
  600. $(Q)rm -f .old_version
  601. # The actual objects are generated when descending,
  602. # make sure no implicit rule kicks in
  603. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  604. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  605. # Preset locale variables to speed up the build process. Limit locale
  606. # tweaks to this spot to avoid wrong language settings when running
  607. # make menuconfig etc.
  608. # Error messages still appears in the original language
  609. .PHONY: $(vmlinux-dirs)
  610. $(vmlinux-dirs): prepare scripts
  611. $(Q)$(MAKE) $(build)=$@
  612. # Build the kernel release string
  613. # The KERNELRELEASE is stored in a file named .kernelrelease
  614. # to be used when executing for example make install or make modules_install
  615. #
  616. # Take the contents of any files called localversion* and the config
  617. # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
  618. # LOCALVERSION from the command line override all of this
  619. nullstring :=
  620. space := $(nullstring) # end of line
  621. ___localver = $(objtree)/localversion* $(srctree)/localversion*
  622. __localver = $(sort $(wildcard $(___localver)))
  623. # skip backup files (containing '~')
  624. _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
  625. localver = $(subst $(space),, \
  626. $(shell cat /dev/null $(_localver)) \
  627. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  628. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  629. # and if the SCM is know a tag from the SCM is appended.
  630. # The appended tag is determinded by the SCM used.
  631. #
  632. # Currently, only git is supported.
  633. # Other SCMs can edit scripts/setlocalversion and add the appropriate
  634. # checks as needed.
  635. ifdef CONFIG_LOCALVERSION_AUTO
  636. _localver-auto = $(shell $(CONFIG_SHELL) \
  637. $(srctree)/scripts/setlocalversion $(srctree))
  638. localver-auto = $(LOCALVERSION)$(_localver-auto)
  639. endif
  640. localver-full = $(localver)$(localver-auto)
  641. # Store (new) KERNELRELASE string in .kernelrelease
  642. kernelrelease = $(KERNELVERSION)$(localver-full)
  643. .kernelrelease: FORCE
  644. $(Q)rm -f $@
  645. $(Q)echo $(kernelrelease) > $@
  646. # Things we need to do before we recursively start building the kernel
  647. # or the modules are listed in "prepare".
  648. # A multi level approach is used. prepareN is processed before prepareN-1.
  649. # archprepare is used in arch Makefiles and when processed asm symlink,
  650. # version.h and scripts_basic is processed / created.
  651. # Listed in dependency order
  652. .PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
  653. # prepare-all is deprecated, use prepare as valid replacement
  654. .PHONY: prepare-all
  655. # prepare3 is used to check if we are building in a separate output directory,
  656. # and if so do:
  657. # 1) Check that make has not been executed in the kernel src $(srctree)
  658. # 2) Create the include2 directory, used for the second asm symlink
  659. prepare3: .kernelrelease
  660. ifneq ($(KBUILD_SRC),)
  661. @echo ' Using $(srctree) as source for kernel'
  662. $(Q)if [ -f $(srctree)/.config ]; then \
  663. echo " $(srctree) is not clean, please run 'make mrproper'";\
  664. echo " in the '$(srctree)' directory.";\
  665. /bin/false; \
  666. fi;
  667. $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
  668. $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
  669. endif
  670. # prepare2 creates a makefile if using a separate output directory
  671. prepare2: prepare3 outputmakefile
  672. prepare1: prepare2 include/linux/version.h include/asm \
  673. include/config/MARKER
  674. ifneq ($(KBUILD_MODULES),)
  675. $(Q)rm -rf $(MODVERDIR)
  676. $(Q)mkdir -p $(MODVERDIR)
  677. endif
  678. archprepare: prepare1 scripts_basic
  679. prepare0: archprepare FORCE
  680. $(Q)$(MAKE) $(build)=.
  681. # All the preparing..
  682. prepare prepare-all: prepare0
  683. # Leave this as default for preprocessing vmlinux.lds.S, which is now
  684. # done in arch/$(ARCH)/kernel/Makefile
  685. export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
  686. # Single targets
  687. # ---------------------------------------------------------------------------
  688. %.s: %.c scripts FORCE
  689. $(Q)$(MAKE) $(build)=$(@D) $@
  690. %.i: %.c scripts FORCE
  691. $(Q)$(MAKE) $(build)=$(@D) $@
  692. %.o: %.c scripts FORCE
  693. $(Q)$(MAKE) $(build)=$(@D) $@
  694. %.ko: scripts FORCE
  695. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
  696. $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
  697. %/: scripts prepare FORCE
  698. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
  699. %.lst: %.c scripts FORCE
  700. $(Q)$(MAKE) $(build)=$(@D) $@
  701. %.s: %.S scripts FORCE
  702. $(Q)$(MAKE) $(build)=$(@D) $@
  703. %.o: %.S scripts FORCE
  704. $(Q)$(MAKE) $(build)=$(@D) $@
  705. # FIXME: The asm symlink changes when $(ARCH) changes. That's
  706. # hard to detect, but I suppose "make mrproper" is a good idea
  707. # before switching between archs anyway.
  708. include/asm:
  709. @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
  710. $(Q)if [ ! -d include ]; then mkdir -p include; fi;
  711. @ln -fsn asm-$(ARCH) $@
  712. # Split autoconf.h into include/linux/config/*
  713. include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
  714. @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
  715. @scripts/basic/split-include include/linux/autoconf.h include/config
  716. @touch $@
  717. # Generate some files
  718. # ---------------------------------------------------------------------------
  719. # KERNELRELEASE can change from a few different places, meaning version.h
  720. # needs to be updated, so this check is forced on all builds
  721. uts_len := 64
  722. define filechk_version.h
  723. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  724. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  725. exit 1; \
  726. fi; \
  727. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
  728. echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
  729. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
  730. )
  731. endef
  732. include/linux/version.h: $(srctree)/Makefile .config FORCE
  733. $(call filechk,version.h)
  734. # ---------------------------------------------------------------------------
  735. .PHONY: depend dep
  736. depend dep:
  737. @echo '*** Warning: make $@ is unnecessary now.'
  738. # ---------------------------------------------------------------------------
  739. # Modules
  740. ifdef CONFIG_MODULES
  741. # By default, build modules as well
  742. all: modules
  743. # Build modules
  744. .PHONY: modules
  745. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  746. @echo ' Building modules, stage 2.';
  747. $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
  748. # Target to prepare building external modules
  749. .PHONY: modules_prepare
  750. modules_prepare: prepare scripts
  751. # Target to install modules
  752. .PHONY: modules_install
  753. modules_install: _modinst_ _modinst_post
  754. .PHONY: _modinst_
  755. _modinst_:
  756. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  757. echo "Warning: you may need to install module-init-tools"; \
  758. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  759. sleep 1; \
  760. fi
  761. @rm -rf $(MODLIB)/kernel
  762. @rm -f $(MODLIB)/source
  763. @mkdir -p $(MODLIB)/kernel
  764. @ln -s $(srctree) $(MODLIB)/source
  765. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  766. rm -f $(MODLIB)/build ; \
  767. ln -s $(objtree) $(MODLIB)/build ; \
  768. fi
  769. $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
  770. # If System.map exists, run depmod. This deliberately does not have a
  771. # dependency on System.map since that would run the dependency tree on
  772. # vmlinux. This depmod is only for convenience to give the initial
  773. # boot a modules.dep even before / is mounted read-write. However the
  774. # boot script depmod is the master version.
  775. ifeq "$(strip $(INSTALL_MOD_PATH))" ""
  776. depmod_opts :=
  777. else
  778. depmod_opts := -b $(INSTALL_MOD_PATH) -r
  779. endif
  780. .PHONY: _modinst_post
  781. _modinst_post: _modinst_
  782. if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
  783. else # CONFIG_MODULES
  784. # Modules not configured
  785. # ---------------------------------------------------------------------------
  786. modules modules_install: FORCE
  787. @echo
  788. @echo "The present kernel configuration has modules disabled."
  789. @echo "Type 'make config' and enable loadable module support."
  790. @echo "Then build a kernel with module support enabled."
  791. @echo
  792. @exit 1
  793. endif # CONFIG_MODULES
  794. ###
  795. # Cleaning is done on three levels.
  796. # make clean Delete most generated files
  797. # Leave enough to build external modules
  798. # make mrproper Delete the current configuration, and all generated files
  799. # make distclean Remove editor backup files, patch leftover files and the like
  800. # Directories & files removed with 'make clean'
  801. CLEAN_DIRS += $(MODVERDIR)
  802. CLEAN_FILES += vmlinux System.map \
  803. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  804. # Directories & files removed with 'make mrproper'
  805. MRPROPER_DIRS += include/config include2
  806. MRPROPER_FILES += .config .config.old include/asm .version .old_version \
  807. include/linux/autoconf.h include/linux/version.h \
  808. .kernelrelease Module.symvers tags TAGS cscope*
  809. # clean - Delete most, but leave enough to build external modules
  810. #
  811. clean: rm-dirs := $(CLEAN_DIRS)
  812. clean: rm-files := $(CLEAN_FILES)
  813. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
  814. .PHONY: $(clean-dirs) clean archclean
  815. $(clean-dirs):
  816. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  817. clean: archclean $(clean-dirs)
  818. $(call cmd,rmdirs)
  819. $(call cmd,rmfiles)
  820. @find . $(RCS_FIND_IGNORE) \
  821. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  822. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  823. -type f -print | xargs rm -f
  824. # mrproper - Delete all generated files, including .config
  825. #
  826. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  827. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  828. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  829. .PHONY: $(mrproper-dirs) mrproper archmrproper
  830. $(mrproper-dirs):
  831. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  832. mrproper: clean archmrproper $(mrproper-dirs)
  833. $(call cmd,rmdirs)
  834. $(call cmd,rmfiles)
  835. # distclean
  836. #
  837. .PHONY: distclean
  838. distclean: mrproper
  839. @find $(srctree) $(RCS_FIND_IGNORE) \
  840. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  841. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  842. -o -name '.*.rej' -o -size 0 \
  843. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  844. -type f -print | xargs rm -f
  845. # Packaging of the kernel to various formats
  846. # ---------------------------------------------------------------------------
  847. # rpm target kept for backward compatibility
  848. package-dir := $(srctree)/scripts/package
  849. .PHONY: %-pkg rpm
  850. %pkg: FORCE
  851. $(Q)$(MAKE) -f $(package-dir)/Makefile $@
  852. rpm: FORCE
  853. $(Q)$(MAKE) -f $(package-dir)/Makefile $@
  854. # Brief documentation of the typical targets used
  855. # ---------------------------------------------------------------------------
  856. boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
  857. boards := $(notdir $(boards))
  858. help:
  859. @echo 'Cleaning targets:'
  860. @echo ' clean - remove most generated files but keep the config'
  861. @echo ' mrproper - remove all generated files + config + various backup files'
  862. @echo ''
  863. @echo 'Configuration targets:'
  864. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  865. @echo ''
  866. @echo 'Other generic targets:'
  867. @echo ' all - Build all targets marked with [*]'
  868. @echo '* vmlinux - Build the bare kernel'
  869. @echo '* modules - Build all modules'
  870. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  871. @echo ' dir/ - Build all files in dir and below'
  872. @echo ' dir/file.[ois] - Build specified target only'
  873. @echo ' dir/file.ko - Build module including final link'
  874. @echo ' rpm - Build a kernel as an RPM package'
  875. @echo ' tags/TAGS - Generate tags file for editors'
  876. @echo ' cscope - Generate cscope index'
  877. @echo ' kernelrelease - Output the release version string'
  878. @echo ' kernelversion - Output the version stored in Makefile'
  879. @echo ''
  880. @echo 'Static analysers'
  881. @echo ' buildcheck - List dangling references to vmlinux discarded sections'
  882. @echo ' and init sections from non-init sections'
  883. @echo ' checkstack - Generate a list of stack hogs'
  884. @echo ' namespacecheck - Name space analysis on compiled kernel'
  885. @echo ''
  886. @echo 'Kernel packaging:'
  887. @$(MAKE) -f $(package-dir)/Makefile help
  888. @echo ''
  889. @echo 'Documentation targets:'
  890. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  891. @echo ''
  892. @echo 'Architecture specific targets ($(ARCH)):'
  893. @$(if $(archhelp),$(archhelp),\
  894. echo ' No architecture specific help defined for $(ARCH)')
  895. @echo ''
  896. @$(if $(boards), \
  897. $(foreach b, $(boards), \
  898. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  899. echo '')
  900. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  901. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  902. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
  903. @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
  904. @echo ''
  905. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  906. @echo 'For further info see the ./README file'
  907. # Documentation targets
  908. # ---------------------------------------------------------------------------
  909. %docs: scripts_basic FORCE
  910. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  911. else # KBUILD_EXTMOD
  912. ###
  913. # External module support.
  914. # When building external modules the kernel used as basis is considered
  915. # read-only, and no consistency checks are made and the make
  916. # system is not used on the basis kernel. If updates are required
  917. # in the basis kernel ordinary make commands (without M=...) must
  918. # be used.
  919. #
  920. # The following are the only valid targets when building external
  921. # modules.
  922. # make M=dir clean Delete all automatically generated files
  923. # make M=dir modules Make all modules in specified dir
  924. # make M=dir Same as 'make M=dir modules'
  925. # make M=dir modules_install
  926. # Install the modules build in the module directory
  927. # Assumes install directory is already created
  928. # We are always building modules
  929. KBUILD_MODULES := 1
  930. .PHONY: crmodverdir
  931. crmodverdir:
  932. $(Q)mkdir -p $(MODVERDIR)
  933. .PHONY: $(objtree)/Module.symvers
  934. $(objtree)/Module.symvers:
  935. @test -e $(objtree)/Module.symvers || ( \
  936. echo; \
  937. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  938. echo " is missing; modules will have no dependencies and modversions."; \
  939. echo )
  940. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  941. .PHONY: $(module-dirs) modules
  942. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  943. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  944. modules: $(module-dirs)
  945. @echo ' Building modules, stage 2.';
  946. $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
  947. .PHONY: modules_install
  948. modules_install:
  949. $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
  950. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  951. .PHONY: $(clean-dirs) clean
  952. $(clean-dirs):
  953. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  954. clean: rm-dirs := $(MODVERDIR)
  955. clean: $(clean-dirs)
  956. $(call cmd,rmdirs)
  957. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  958. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  959. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  960. -type f -print | xargs rm -f
  961. help:
  962. @echo ' Building external modules.'
  963. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  964. @echo ''
  965. @echo ' modules - default target, build the module(s)'
  966. @echo ' modules_install - install the module'
  967. @echo ' clean - remove generated files in module directory only'
  968. @echo ''
  969. endif # KBUILD_EXTMOD
  970. # Generate tags for editors
  971. # ---------------------------------------------------------------------------
  972. #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
  973. #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
  974. #Adding $(srctree) adds about 20M on i386 to the size of the output file!
  975. ifeq ($(src),$(obj))
  976. __srctree =
  977. else
  978. __srctree = $(srctree)/
  979. endif
  980. ifeq ($(ALLSOURCE_ARCHS),)
  981. ifeq ($(ARCH),um)
  982. ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
  983. else
  984. ALLINCLUDE_ARCHS := $(ARCH)
  985. endif
  986. else
  987. #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
  988. ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
  989. endif
  990. ALLSOURCE_ARCHS := $(ARCH)
  991. define all-sources
  992. ( find $(__srctree) $(RCS_FIND_IGNORE) \
  993. \( -name include -o -name arch \) -prune -o \
  994. -name '*.[chS]' -print; \
  995. for ARCH in $(ALLSOURCE_ARCHS) ; do \
  996. find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
  997. -name '*.[chS]' -print; \
  998. done ; \
  999. find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
  1000. -name '*.[chS]' -print; \
  1001. find $(__srctree)include $(RCS_FIND_IGNORE) \
  1002. \( -name config -o -name 'asm-*' \) -prune \
  1003. -o -name '*.[chS]' -print; \
  1004. for ARCH in $(ALLINCLUDE_ARCHS) ; do \
  1005. find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
  1006. -name '*.[chS]' -print; \
  1007. done ; \
  1008. find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
  1009. -name '*.[chS]' -print )
  1010. endef
  1011. quiet_cmd_cscope-file = FILELST cscope.files
  1012. cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
  1013. quiet_cmd_cscope = MAKE cscope.out
  1014. cmd_cscope = cscope -b
  1015. cscope: FORCE
  1016. $(call cmd,cscope-file)
  1017. $(call cmd,cscope)
  1018. quiet_cmd_TAGS = MAKE $@
  1019. define cmd_TAGS
  1020. rm -f $@; \
  1021. ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
  1022. echo "-I __initdata,__exitdata,__acquires,__releases \
  1023. -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
  1024. --extra=+f --c-kinds=+px"`; \
  1025. $(all-sources) | xargs etags $$ETAGSF -a
  1026. endef
  1027. TAGS: FORCE
  1028. $(call cmd,TAGS)
  1029. quiet_cmd_tags = MAKE $@
  1030. define cmd_tags
  1031. rm -f $@; \
  1032. CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
  1033. echo "-I __initdata,__exitdata,__acquires,__releases \
  1034. -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
  1035. --extra=+f --c-kinds=+px"`; \
  1036. $(all-sources) | xargs ctags $$CTAGSF -a
  1037. endef
  1038. tags: FORCE
  1039. $(call cmd,tags)
  1040. # Scripts to check various things for consistency
  1041. # ---------------------------------------------------------------------------
  1042. includecheck:
  1043. find * $(RCS_FIND_IGNORE) \
  1044. -name '*.[hcS]' -type f -print | sort \
  1045. | xargs $(PERL) -w scripts/checkincludes.pl
  1046. versioncheck:
  1047. find * $(RCS_FIND_IGNORE) \
  1048. -name '*.[hcS]' -type f -print | sort \
  1049. | xargs $(PERL) -w scripts/checkversion.pl
  1050. buildcheck:
  1051. $(PERL) $(srctree)/scripts/reference_discarded.pl
  1052. $(PERL) $(srctree)/scripts/reference_init.pl
  1053. namespacecheck:
  1054. $(PERL) $(srctree)/scripts/namespace.pl
  1055. endif #ifeq ($(config-targets),1)
  1056. endif #ifeq ($(mixed-targets),1)
  1057. .PHONY: checkstack
  1058. checkstack:
  1059. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1060. $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
  1061. kernelrelease:
  1062. $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
  1063. $(error kernelrelease not valid - run 'make *config' to update it))
  1064. kernelversion:
  1065. @echo $(KERNELVERSION)
  1066. # FIXME Should go into a make.lib or something
  1067. # ===========================================================================
  1068. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1069. cmd_rmdirs = rm -rf $(rm-dirs)
  1070. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1071. cmd_rmfiles = rm -f $(rm-files)
  1072. a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
  1073. $(NOSTDINC_FLAGS) $(CPPFLAGS) \
  1074. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
  1075. quiet_cmd_as_o_S = AS $@
  1076. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1077. # read all saved command lines
  1078. targets := $(wildcard $(sort $(targets)))
  1079. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1080. ifneq ($(cmd_files),)
  1081. $(cmd_files): ; # Do not try to update included dependency files
  1082. include $(cmd_files)
  1083. endif
  1084. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1085. # Usage:
  1086. # $(Q)$(MAKE) $(clean)=dir
  1087. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1088. endif # skip-makefile
  1089. FORCE: