Makefile 55 KB

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  1. VERSION = 2
  2. PATCHLEVEL = 6
  3. SUBLEVEL = 27
  4. EXTRAVERSION =
  5. NAME = Rotary Wombat
  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 avoids hard-to-debug behaviour);
  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. # Cancel implicit rules on top Makefile
  97. $(CURDIR)/Makefile Makefile: ;
  98. ifneq ($(KBUILD_OUTPUT),)
  99. # Invoke a second make in the output directory, passing relevant variables
  100. # check that the output directory actually exists
  101. saved-output := $(KBUILD_OUTPUT)
  102. KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  103. $(if $(KBUILD_OUTPUT),, \
  104. $(error output directory "$(saved-output)" does not exist))
  105. PHONY += $(MAKECMDGOALS) sub-make
  106. $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
  107. $(Q)@:
  108. sub-make: FORCE
  109. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  110. KBUILD_SRC=$(CURDIR) \
  111. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
  112. $(filter-out _all sub-make,$(MAKECMDGOALS))
  113. # Leave processing to above invocation of make
  114. skip-makefile := 1
  115. endif # ifneq ($(KBUILD_OUTPUT),)
  116. endif # ifeq ($(KBUILD_SRC),)
  117. # We process the rest of the Makefile if this is the final invocation of make
  118. ifeq ($(skip-makefile),)
  119. # If building an external module we do not care about the all: rule
  120. # but instead _all depend on modules
  121. PHONY += all
  122. ifeq ($(KBUILD_EXTMOD),)
  123. _all: all
  124. else
  125. _all: modules
  126. endif
  127. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  128. TOPDIR := $(srctree)
  129. # FIXME - TOPDIR is obsolete, use srctree/objtree
  130. objtree := $(CURDIR)
  131. src := $(srctree)
  132. obj := $(objtree)
  133. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  134. export srctree objtree VPATH TOPDIR
  135. # SUBARCH tells the usermode build what the underlying arch is. That is set
  136. # first, and if a usermode build is happening, the "ARCH=um" on the command
  137. # line overrides the setting of ARCH below. If a native build is happening,
  138. # then ARCH is assigned, getting whatever value it gets normally, and
  139. # SUBARCH is subsequently ignored.
  140. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  141. -e s/arm.*/arm/ -e s/sa110/arm/ \
  142. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  143. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  144. -e s/sh.*/sh/ )
  145. # Cross compiling and selecting different set of gcc/bin-utils
  146. # ---------------------------------------------------------------------------
  147. #
  148. # When performing cross compilation for other architectures ARCH shall be set
  149. # to the target architecture. (See arch/* for the possibilities).
  150. # ARCH can be set during invocation of make:
  151. # make ARCH=ia64
  152. # Another way is to have ARCH set in the environment.
  153. # The default ARCH is the host where make is executed.
  154. # CROSS_COMPILE specify the prefix used for all executables used
  155. # during compilation. Only gcc and related bin-utils executables
  156. # are prefixed with $(CROSS_COMPILE).
  157. # CROSS_COMPILE can be set on the command line
  158. # make CROSS_COMPILE=ia64-linux-
  159. # Alternatively CROSS_COMPILE can be set in the environment.
  160. # Default value for CROSS_COMPILE is not to prefix executables
  161. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  162. export KBUILD_BUILDHOST := $(SUBARCH)
  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. endif
  172. ifeq ($(ARCH),x86_64)
  173. SRCARCH := x86
  174. endif
  175. # Where to locate arch specific headers
  176. ifeq ($(ARCH),sparc64)
  177. hdr-arch := sparc
  178. else
  179. hdr-arch := $(SRCARCH)
  180. endif
  181. KCONFIG_CONFIG ?= .config
  182. # SHELL used by kbuild
  183. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  184. else if [ -x /bin/bash ]; then echo /bin/bash; \
  185. else echo sh; fi ; fi)
  186. HOSTCC = gcc
  187. HOSTCXX = g++
  188. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  189. HOSTCXXFLAGS = -O2
  190. # Decide whether to build built-in, modular, or both.
  191. # Normally, just do built-in.
  192. KBUILD_MODULES :=
  193. KBUILD_BUILTIN := 1
  194. # If we have only "make modules", don't compile built-in objects.
  195. # When we're building modules with modversions, we need to consider
  196. # the built-in objects during the descend as well, in order to
  197. # make sure the checksums are up to date before we record them.
  198. ifeq ($(MAKECMDGOALS),modules)
  199. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  200. endif
  201. # If we have "make <whatever> modules", compile modules
  202. # in addition to whatever we do anyway.
  203. # Just "make" or "make all" shall build modules as well
  204. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  205. KBUILD_MODULES := 1
  206. endif
  207. ifeq ($(MAKECMDGOALS),)
  208. KBUILD_MODULES := 1
  209. endif
  210. export KBUILD_MODULES KBUILD_BUILTIN
  211. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  212. # Beautify output
  213. # ---------------------------------------------------------------------------
  214. #
  215. # Normally, we echo the whole command before executing it. By making
  216. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  217. # $(quiet) to choose other forms of output instead, e.g.
  218. #
  219. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  220. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  221. #
  222. # If $(quiet) is empty, the whole command will be printed.
  223. # If it is set to "quiet_", only the short version will be printed.
  224. # If it is set to "silent_", nothing will be printed at all, since
  225. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  226. #
  227. # A simple variant is to prefix commands with $(Q) - that's useful
  228. # for commands that shall be hidden in non-verbose mode.
  229. #
  230. # $(Q)ln $@ :<
  231. #
  232. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  233. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  234. ifeq ($(KBUILD_VERBOSE),1)
  235. quiet =
  236. Q =
  237. else
  238. quiet=quiet_
  239. Q = @
  240. endif
  241. # If the user is running make -s (silent mode), suppress echoing of
  242. # commands
  243. ifneq ($(findstring s,$(MAKEFLAGS)),)
  244. quiet=silent_
  245. endif
  246. export quiet Q KBUILD_VERBOSE
  247. # Look for make include files relative to root of kernel src
  248. MAKEFLAGS += --include-dir=$(srctree)
  249. # We need some generic definitions (do not try to remake the file).
  250. $(srctree)/scripts/Kbuild.include: ;
  251. include $(srctree)/scripts/Kbuild.include
  252. # Make variables (CC, etc...)
  253. AS = $(CROSS_COMPILE)as
  254. LD = $(CROSS_COMPILE)ld
  255. CC = $(CROSS_COMPILE)gcc
  256. CPP = $(CC) -E
  257. AR = $(CROSS_COMPILE)ar
  258. NM = $(CROSS_COMPILE)nm
  259. STRIP = $(CROSS_COMPILE)strip
  260. OBJCOPY = $(CROSS_COMPILE)objcopy
  261. OBJDUMP = $(CROSS_COMPILE)objdump
  262. AWK = awk
  263. GENKSYMS = scripts/genksyms/genksyms
  264. DEPMOD = /sbin/depmod
  265. KALLSYMS = scripts/kallsyms
  266. PERL = perl
  267. CHECK = sparse
  268. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
  269. MODFLAGS = -DMODULE
  270. CFLAGS_MODULE = $(MODFLAGS)
  271. AFLAGS_MODULE = $(MODFLAGS)
  272. LDFLAGS_MODULE =
  273. CFLAGS_KERNEL =
  274. AFLAGS_KERNEL =
  275. # Use LINUXINCLUDE when you must reference the include/ directory.
  276. # Needed to be compatible with the O= option
  277. LINUXINCLUDE := -Iinclude \
  278. $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
  279. -I$(srctree)/arch/$(hdr-arch)/include \
  280. -include include/linux/autoconf.h
  281. KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
  282. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  283. -fno-strict-aliasing -fno-common \
  284. -Werror-implicit-function-declaration
  285. KBUILD_AFLAGS := -D__ASSEMBLY__
  286. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  287. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  288. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  289. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  290. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  291. export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
  292. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  293. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  294. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
  295. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  296. # When compiling out-of-tree modules, put MODVERDIR in the module
  297. # tree rather than in the kernel tree. The kernel tree might
  298. # even be read-only.
  299. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  300. # Files to ignore in find ... statements
  301. 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
  302. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  303. # ===========================================================================
  304. # Rules shared between *config targets and build targets
  305. # Basic helpers built in scripts/
  306. PHONY += scripts_basic
  307. scripts_basic:
  308. $(Q)$(MAKE) $(build)=scripts/basic
  309. # To avoid any implicit rule to kick in, define an empty command.
  310. scripts/basic/%: scripts_basic ;
  311. PHONY += outputmakefile
  312. # outputmakefile generates a Makefile in the output directory, if using a
  313. # separate output directory. This allows convenient use of make in the
  314. # output directory.
  315. outputmakefile:
  316. ifneq ($(KBUILD_SRC),)
  317. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  318. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  319. endif
  320. # To make sure we do not include .config for any of the *config targets
  321. # catch them early, and hand them over to scripts/kconfig/Makefile
  322. # It is allowed to specify more targets when calling make, including
  323. # mixing *config targets and build targets.
  324. # For example 'make oldconfig all'.
  325. # Detect when mixed targets is specified, and make a second invocation
  326. # of make so .config is not included in this case either (for *config).
  327. no-dot-config-targets := clean mrproper distclean \
  328. cscope TAGS tags help %docs check% \
  329. include/linux/version.h headers_% \
  330. kernelrelease kernelversion
  331. config-targets := 0
  332. mixed-targets := 0
  333. dot-config := 1
  334. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  335. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  336. dot-config := 0
  337. endif
  338. endif
  339. ifeq ($(KBUILD_EXTMOD),)
  340. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  341. config-targets := 1
  342. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  343. mixed-targets := 1
  344. endif
  345. endif
  346. endif
  347. ifeq ($(mixed-targets),1)
  348. # ===========================================================================
  349. # We're called with mixed targets (*config and build targets).
  350. # Handle them one by one.
  351. %:: FORCE
  352. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  353. else
  354. ifeq ($(config-targets),1)
  355. # ===========================================================================
  356. # *config targets only - make sure prerequisites are updated, and descend
  357. # in scripts/kconfig to make the *config target
  358. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  359. # KBUILD_DEFCONFIG may point out an alternative default configuration
  360. # used for 'make defconfig'
  361. include $(srctree)/arch/$(SRCARCH)/Makefile
  362. export KBUILD_DEFCONFIG
  363. config %config: scripts_basic outputmakefile FORCE
  364. $(Q)mkdir -p include/linux include/config
  365. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  366. else
  367. # ===========================================================================
  368. # Build targets only - this includes vmlinux, arch specific targets, clean
  369. # targets and others. In general all targets except *config targets.
  370. ifeq ($(KBUILD_EXTMOD),)
  371. # Additional helpers built in scripts/
  372. # Carefully list dependencies so we do not try to build scripts twice
  373. # in parallel
  374. PHONY += scripts
  375. scripts: scripts_basic include/config/auto.conf
  376. $(Q)$(MAKE) $(build)=$(@)
  377. # Objects we will link into vmlinux / subdirs we need to visit
  378. init-y := init/
  379. drivers-y := drivers/ sound/ firmware/
  380. net-y := net/
  381. libs-y := lib/
  382. core-y := usr/
  383. endif # KBUILD_EXTMOD
  384. ifeq ($(dot-config),1)
  385. # Read in config
  386. -include include/config/auto.conf
  387. ifeq ($(KBUILD_EXTMOD),)
  388. # Read in dependencies to all Kconfig* files, make sure to run
  389. # oldconfig if changes are detected.
  390. -include include/config/auto.conf.cmd
  391. # To avoid any implicit rule to kick in, define an empty command
  392. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  393. # If .config is newer than include/config/auto.conf, someone tinkered
  394. # with it and forgot to run make oldconfig.
  395. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  396. # we execute the config step to be sure to catch updated Kconfig files
  397. include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  398. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  399. else
  400. # external modules needs include/linux/autoconf.h and include/config/auto.conf
  401. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  402. PHONY += include/config/auto.conf
  403. include/config/auto.conf:
  404. $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
  405. echo; \
  406. echo " ERROR: Kernel configuration is invalid."; \
  407. echo " include/linux/autoconf.h or $@ are missing."; \
  408. echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  409. echo; \
  410. /bin/false)
  411. endif # KBUILD_EXTMOD
  412. else
  413. # Dummy target needed, because used as prerequisite
  414. include/config/auto.conf: ;
  415. endif # $(dot-config)
  416. # The all: target is the default when no target is given on the
  417. # command line.
  418. # This allow a user to issue only 'make' to build a kernel including modules
  419. # Defaults vmlinux but it is usually overridden in the arch makefile
  420. all: vmlinux
  421. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  422. KBUILD_CFLAGS += -Os
  423. else
  424. KBUILD_CFLAGS += -O2
  425. endif
  426. include $(srctree)/arch/$(SRCARCH)/Makefile
  427. ifneq (CONFIG_FRAME_WARN,0)
  428. KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  429. endif
  430. # Force gcc to behave correct even for buggy distributions
  431. # Arch Makefiles may override this setting
  432. KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
  433. ifdef CONFIG_FRAME_POINTER
  434. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  435. else
  436. KBUILD_CFLAGS += -fomit-frame-pointer
  437. endif
  438. ifdef CONFIG_DEBUG_INFO
  439. KBUILD_CFLAGS += -g
  440. KBUILD_AFLAGS += -gdwarf-2
  441. endif
  442. ifdef CONFIG_FTRACE
  443. KBUILD_CFLAGS += -pg
  444. endif
  445. # We trigger additional mismatches with less inlining
  446. ifdef CONFIG_DEBUG_SECTION_MISMATCH
  447. KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  448. endif
  449. # arch Makefile may override CC so keep this after arch Makefile is included
  450. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  451. CHECKFLAGS += $(NOSTDINC_FLAGS)
  452. # warn about C99 declaration after statement
  453. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  454. # disable pointer signed / unsigned warnings in gcc 4.0
  455. KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  456. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  457. # But warn user when we do so
  458. warn-assign = \
  459. $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
  460. ifneq ($(KCPPFLAGS),)
  461. $(call warn-assign,CPPFLAGS)
  462. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  463. endif
  464. ifneq ($(KAFLAGS),)
  465. $(call warn-assign,AFLAGS)
  466. KBUILD_AFLAGS += $(KAFLAGS)
  467. endif
  468. ifneq ($(KCFLAGS),)
  469. $(call warn-assign,CFLAGS)
  470. KBUILD_CFLAGS += $(KCFLAGS)
  471. endif
  472. # Use --build-id when available.
  473. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  474. $(call ld-option, -Wl$(comma)--build-id,))
  475. LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  476. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  477. # Default kernel image to build when no specific target is given.
  478. # KBUILD_IMAGE may be overruled on the command line or
  479. # set in the environment
  480. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  481. # this default value
  482. export KBUILD_IMAGE ?= vmlinux
  483. #
  484. # INSTALL_PATH specifies where to place the updated kernel and system map
  485. # images. Default is /boot, but you can set it to other values
  486. export INSTALL_PATH ?= /boot
  487. #
  488. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  489. # relocations required by build roots. This is not defined in the
  490. # makefile but the argument can be passed to make if needed.
  491. #
  492. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  493. export MODLIB
  494. #
  495. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  496. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  497. # the default option --strip-debug will be used. Otherwise,
  498. # INSTALL_MOD_STRIP will used as the options to the strip command.
  499. ifdef INSTALL_MOD_STRIP
  500. ifeq ($(INSTALL_MOD_STRIP),1)
  501. mod_strip_cmd = $(STRIP) --strip-debug
  502. else
  503. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  504. endif # INSTALL_MOD_STRIP=1
  505. else
  506. mod_strip_cmd = true
  507. endif # INSTALL_MOD_STRIP
  508. export mod_strip_cmd
  509. ifeq ($(KBUILD_EXTMOD),)
  510. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  511. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  512. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  513. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  514. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  515. $(init-n) $(init-) \
  516. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  517. $(net-n) $(net-) $(libs-n) $(libs-))))
  518. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  519. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  520. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  521. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  522. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  523. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  524. libs-y := $(libs-y1) $(libs-y2)
  525. # Build vmlinux
  526. # ---------------------------------------------------------------------------
  527. # vmlinux is built from the objects selected by $(vmlinux-init) and
  528. # $(vmlinux-main). Most are built-in.o files from top-level directories
  529. # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  530. # Ordering when linking is important, and $(vmlinux-init) must be first.
  531. #
  532. # vmlinux
  533. # ^
  534. # |
  535. # +-< $(vmlinux-init)
  536. # | +--< init/version.o + more
  537. # |
  538. # +--< $(vmlinux-main)
  539. # | +--< driver/built-in.o mm/built-in.o + more
  540. # |
  541. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  542. #
  543. # vmlinux version (uname -v) cannot be updated during normal
  544. # descending-into-subdirs phase since we do not yet know if we need to
  545. # update vmlinux.
  546. # Therefore this step is delayed until just before final link of vmlinux -
  547. # except in the kallsyms case where it is done just before adding the
  548. # symbols to the kernel.
  549. #
  550. # System.map is generated to document addresses of all kernel symbols
  551. vmlinux-init := $(head-y) $(init-y)
  552. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  553. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  554. vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
  555. export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
  556. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  557. # May be overridden by arch/$(ARCH)/Makefile
  558. quiet_cmd_vmlinux__ ?= LD $@
  559. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  560. -T $(vmlinux-lds) $(vmlinux-init) \
  561. --start-group $(vmlinux-main) --end-group \
  562. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
  563. # Generate new vmlinux version
  564. quiet_cmd_vmlinux_version = GEN .version
  565. cmd_vmlinux_version = set -e; \
  566. if [ ! -r .version ]; then \
  567. rm -f .version; \
  568. echo 1 >.version; \
  569. else \
  570. mv .version .old_version; \
  571. expr 0$$(cat .old_version) + 1 >.version; \
  572. fi; \
  573. $(MAKE) $(build)=init
  574. # Generate System.map
  575. quiet_cmd_sysmap = SYSMAP
  576. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  577. # Link of vmlinux
  578. # If CONFIG_KALLSYMS is set .version is already updated
  579. # Generate System.map and verify that the content is consistent
  580. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  581. # First command is ':' to allow us to use + in front of the rule
  582. define rule_vmlinux__
  583. :
  584. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  585. $(call cmd,vmlinux__)
  586. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  587. $(Q)$(if $($(quiet)cmd_sysmap), \
  588. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  589. $(cmd_sysmap) $@ System.map; \
  590. if [ $$? -ne 0 ]; then \
  591. rm -f $@; \
  592. /bin/false; \
  593. fi;
  594. $(verify_kallsyms)
  595. endef
  596. ifdef CONFIG_KALLSYMS
  597. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  598. # It's a three stage process:
  599. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  600. # empty
  601. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  602. # the right size - vmlinux version (uname -v) is updated during this step
  603. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  604. # but due to the added section, some addresses have shifted.
  605. # From here, we generate a correct .tmp_kallsyms2.o
  606. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  607. # o Verify that the System.map from vmlinux matches the map from
  608. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  609. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  610. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  611. # temporary bypass to allow the kernel to be built while the
  612. # maintainers work out what went wrong with kallsyms.
  613. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  614. last_kallsyms := 3
  615. else
  616. last_kallsyms := 2
  617. endif
  618. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  619. define verify_kallsyms
  620. $(Q)$(if $($(quiet)cmd_sysmap), \
  621. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  622. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  623. $(Q)cmp -s System.map .tmp_System.map || \
  624. (echo Inconsistent kallsyms data; \
  625. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  626. rm .tmp_kallsyms* ; /bin/false )
  627. endef
  628. # Update vmlinux version before link
  629. # Use + in front of this rule to silent warning about make -j1
  630. # First command is ':' to allow us to use + in front of this rule
  631. cmd_ksym_ld = $(cmd_vmlinux__)
  632. define rule_ksym_ld
  633. :
  634. +$(call cmd,vmlinux_version)
  635. $(call cmd,vmlinux__)
  636. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  637. endef
  638. # Generate .S file with all kernel symbols
  639. quiet_cmd_kallsyms = KSYM $@
  640. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  641. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  642. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  643. $(call if_changed_dep,as_o_S)
  644. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  645. $(call cmd,kallsyms)
  646. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  647. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  648. $(call if_changed_rule,ksym_ld)
  649. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  650. $(call if_changed,vmlinux__)
  651. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  652. $(call if_changed,vmlinux__)
  653. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  654. $(KALLSYMS): scripts ;
  655. # Generate some data for debugging strange kallsyms problems
  656. debug_kallsyms: .tmp_map$(last_kallsyms)
  657. .tmp_map%: .tmp_vmlinux% FORCE
  658. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  659. .tmp_map3: .tmp_map2
  660. .tmp_map2: .tmp_map1
  661. endif # ifdef CONFIG_KALLSYMS
  662. # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
  663. # relevant sections renamed as per the linker script.
  664. quiet_cmd_vmlinux-modpost = LD $@
  665. cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
  666. $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
  667. $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
  668. define rule_vmlinux-modpost
  669. :
  670. +$(call cmd,vmlinux-modpost)
  671. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  672. $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
  673. endef
  674. # vmlinux image - including updated kernel symbols
  675. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
  676. ifdef CONFIG_HEADERS_CHECK
  677. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  678. endif
  679. ifdef CONFIG_SAMPLES
  680. $(Q)$(MAKE) $(build)=samples
  681. endif
  682. ifdef CONFIG_BUILD_DOCSRC
  683. $(Q)$(MAKE) $(build)=Documentation
  684. endif
  685. $(call vmlinux-modpost)
  686. $(call if_changed_rule,vmlinux__)
  687. $(Q)rm -f .old_version
  688. # build vmlinux.o first to catch section mismatch errors early
  689. ifdef CONFIG_KALLSYMS
  690. .tmp_vmlinux1: vmlinux.o
  691. endif
  692. modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
  693. vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
  694. $(call if_changed_rule,vmlinux-modpost)
  695. # The actual objects are generated when descending,
  696. # make sure no implicit rule kicks in
  697. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  698. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  699. # Preset locale variables to speed up the build process. Limit locale
  700. # tweaks to this spot to avoid wrong language settings when running
  701. # make menuconfig etc.
  702. # Error messages still appears in the original language
  703. PHONY += $(vmlinux-dirs)
  704. $(vmlinux-dirs): prepare scripts
  705. $(Q)$(MAKE) $(build)=$@
  706. # Build the kernel release string
  707. #
  708. # The KERNELRELEASE value built here is stored in the file
  709. # include/config/kernel.release, and is used when executing several
  710. # make targets, such as "make install" or "make modules_install."
  711. #
  712. # The eventual kernel release string consists of the following fields,
  713. # shown in a hierarchical format to show how smaller parts are concatenated
  714. # to form the larger and final value, with values coming from places like
  715. # the Makefile, kernel config options, make command line options and/or
  716. # SCM tag information.
  717. #
  718. # $(KERNELVERSION)
  719. # $(VERSION) eg, 2
  720. # $(PATCHLEVEL) eg, 6
  721. # $(SUBLEVEL) eg, 18
  722. # $(EXTRAVERSION) eg, -rc6
  723. # $(localver-full)
  724. # $(localver)
  725. # localversion* (files without backups, containing '~')
  726. # $(CONFIG_LOCALVERSION) (from kernel config setting)
  727. # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
  728. # ./scripts/setlocalversion (SCM tag, if one exists)
  729. # $(LOCALVERSION) (from make command line if provided)
  730. #
  731. # Note how the final $(localver-auto) string is included *only* if the
  732. # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
  733. # moment, only git is supported but other SCMs can edit the script
  734. # scripts/setlocalversion and add the appropriate checks as needed.
  735. pattern = ".*/localversion[^~]*"
  736. string = $(shell cat /dev/null \
  737. `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
  738. localver = $(subst $(space),, $(string) \
  739. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  740. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  741. # and if the SCM is know a tag from the SCM is appended.
  742. # The appended tag is determined by the SCM used.
  743. #
  744. # Currently, only git is supported.
  745. # Other SCMs can edit scripts/setlocalversion and add the appropriate
  746. # checks as needed.
  747. ifdef CONFIG_LOCALVERSION_AUTO
  748. _localver-auto = $(shell $(CONFIG_SHELL) \
  749. $(srctree)/scripts/setlocalversion $(srctree))
  750. localver-auto = $(LOCALVERSION)$(_localver-auto)
  751. endif
  752. localver-full = $(localver)$(localver-auto)
  753. # Store (new) KERNELRELASE string in include/config/kernel.release
  754. kernelrelease = $(KERNELVERSION)$(localver-full)
  755. include/config/kernel.release: include/config/auto.conf FORCE
  756. $(Q)rm -f $@
  757. $(Q)echo $(kernelrelease) > $@
  758. # Things we need to do before we recursively start building the kernel
  759. # or the modules are listed in "prepare".
  760. # A multi level approach is used. prepareN is processed before prepareN-1.
  761. # archprepare is used in arch Makefiles and when processed asm symlink,
  762. # version.h and scripts_basic is processed / created.
  763. # Listed in dependency order
  764. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  765. # prepare3 is used to check if we are building in a separate output directory,
  766. # and if so do:
  767. # 1) Check that make has not been executed in the kernel src $(srctree)
  768. # 2) Create the include2 directory, used for the second asm symlink
  769. prepare3: include/config/kernel.release
  770. ifneq ($(KBUILD_SRC),)
  771. @echo ' Using $(srctree) as source for kernel'
  772. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  773. echo " $(srctree) is not clean, please run 'make mrproper'";\
  774. echo " in the '$(srctree)' directory.";\
  775. /bin/false; \
  776. fi;
  777. $(Q)if [ ! -d include2 ]; then \
  778. mkdir -p include2; \
  779. ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
  780. fi
  781. endif
  782. # prepare2 creates a makefile if using a separate output directory
  783. prepare2: prepare3 outputmakefile
  784. prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
  785. include/asm include/config/auto.conf
  786. $(cmd_crmodverdir)
  787. archprepare: prepare1 scripts_basic
  788. prepare0: archprepare FORCE
  789. $(Q)$(MAKE) $(build)=.
  790. $(Q)$(MAKE) $(build)=. missing-syscalls
  791. # All the preparing..
  792. prepare: prepare0
  793. # Leave this as default for preprocessing vmlinux.lds.S, which is now
  794. # done in arch/$(ARCH)/kernel/Makefile
  795. export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
  796. # The asm symlink changes when $(ARCH) changes.
  797. # Detect this and ask user to run make mrproper
  798. define check-symlink
  799. set -e; \
  800. if [ -L include/asm ]; then \
  801. asmlink=`readlink include/asm | cut -d '-' -f 2`; \
  802. if [ "$$asmlink" != "$(SRCARCH)" ]; then \
  803. echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
  804. echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
  805. exit 1; \
  806. fi; \
  807. fi
  808. endef
  809. # We create the target directory of the symlink if it does
  810. # not exist so the test in chack-symlink works and we have a
  811. # directory for generated filesas used by some architectures.
  812. define create-symlink
  813. if [ ! -L include/asm ]; then \
  814. echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
  815. if [ ! -d include/asm-$(SRCARCH) ]; then \
  816. mkdir -p include/asm-$(SRCARCH); \
  817. fi; \
  818. ln -fsn asm-$(SRCARCH) $@; \
  819. fi
  820. endef
  821. include/asm: FORCE
  822. $(Q)$(check-symlink)
  823. $(Q)$(create-symlink)
  824. # Generate some files
  825. # ---------------------------------------------------------------------------
  826. # KERNELRELEASE can change from a few different places, meaning version.h
  827. # needs to be updated, so this check is forced on all builds
  828. uts_len := 64
  829. define filechk_utsrelease.h
  830. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  831. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  832. exit 1; \
  833. fi; \
  834. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  835. endef
  836. define filechk_version.h
  837. (echo \#define LINUX_VERSION_CODE $(shell \
  838. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  839. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  840. endef
  841. include/linux/version.h: $(srctree)/Makefile FORCE
  842. $(call filechk,version.h)
  843. include/linux/utsrelease.h: include/config/kernel.release FORCE
  844. $(call filechk,utsrelease.h)
  845. # ---------------------------------------------------------------------------
  846. PHONY += depend dep
  847. depend dep:
  848. @echo '*** Warning: make $@ is unnecessary now.'
  849. # ---------------------------------------------------------------------------
  850. # Firmware install
  851. INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
  852. export INSTALL_FW_PATH
  853. PHONY += firmware_install
  854. firmware_install: FORCE
  855. @mkdir -p $(objtree)/firmware
  856. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
  857. # ---------------------------------------------------------------------------
  858. # Kernel headers
  859. #Default location for installed headers
  860. export INSTALL_HDR_PATH = $(objtree)/usr
  861. hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
  862. # Find out where the Kbuild file is located to support
  863. # arch/$(ARCH)/include/asm
  864. hdr-dir = $(strip \
  865. $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
  866. arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
  867. # If we do an all arch process set dst to asm-$(hdr-arch)
  868. hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
  869. PHONY += __headers
  870. __headers: include/linux/version.h scripts_basic FORCE
  871. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  872. PHONY += headers_install_all
  873. headers_install_all:
  874. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
  875. PHONY += headers_install
  876. headers_install: __headers
  877. $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
  878. $(error Headers not exportable for the $(SRCARCH) architecture))
  879. $(Q)$(MAKE) $(hdr-inst)=include
  880. $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
  881. PHONY += headers_check_all
  882. headers_check_all: headers_install_all
  883. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
  884. PHONY += headers_check
  885. headers_check: headers_install
  886. $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
  887. $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
  888. # ---------------------------------------------------------------------------
  889. # Modules
  890. ifdef CONFIG_MODULES
  891. # By default, build modules as well
  892. all: modules
  893. # Build modules
  894. #
  895. # A module can be listed more than once in obj-m resulting in
  896. # duplicate lines in modules.order files. Those are removed
  897. # using awk while concatenating to the final file.
  898. PHONY += modules
  899. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  900. $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
  901. @echo ' Building modules, stage 2.';
  902. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  903. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
  904. # Target to prepare building external modules
  905. PHONY += modules_prepare
  906. modules_prepare: prepare scripts
  907. # Target to install modules
  908. PHONY += modules_install
  909. modules_install: _modinst_ _modinst_post
  910. PHONY += _modinst_
  911. _modinst_:
  912. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  913. echo "Warning: you may need to install module-init-tools"; \
  914. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  915. sleep 1; \
  916. fi
  917. @rm -rf $(MODLIB)/kernel
  918. @rm -f $(MODLIB)/source
  919. @mkdir -p $(MODLIB)/kernel
  920. @ln -s $(srctree) $(MODLIB)/source
  921. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  922. rm -f $(MODLIB)/build ; \
  923. ln -s $(objtree) $(MODLIB)/build ; \
  924. fi
  925. @cp -f $(objtree)/modules.order $(MODLIB)/
  926. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  927. # This depmod is only for convenience to give the initial
  928. # boot a modules.dep even before / is mounted read-write. However the
  929. # boot script depmod is the master version.
  930. PHONY += _modinst_post
  931. _modinst_post: _modinst_
  932. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
  933. $(call cmd,depmod)
  934. else # CONFIG_MODULES
  935. # Modules not configured
  936. # ---------------------------------------------------------------------------
  937. modules modules_install: FORCE
  938. @echo
  939. @echo "The present kernel configuration has modules disabled."
  940. @echo "Type 'make config' and enable loadable module support."
  941. @echo "Then build a kernel with module support enabled."
  942. @echo
  943. @exit 1
  944. endif # CONFIG_MODULES
  945. ###
  946. # Cleaning is done on three levels.
  947. # make clean Delete most generated files
  948. # Leave enough to build external modules
  949. # make mrproper Delete the current configuration, and all generated files
  950. # make distclean Remove editor backup files, patch leftover files and the like
  951. # Directories & files removed with 'make clean'
  952. CLEAN_DIRS += $(MODVERDIR)
  953. CLEAN_FILES += vmlinux System.map \
  954. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  955. # Directories & files removed with 'make mrproper'
  956. MRPROPER_DIRS += include/config include2 usr/include
  957. MRPROPER_FILES += .config .config.old include/asm .version .old_version \
  958. include/linux/autoconf.h include/linux/version.h \
  959. include/linux/utsrelease.h \
  960. include/linux/bounds.h include/asm*/asm-offsets.h \
  961. Module.symvers Module.markers tags TAGS cscope*
  962. # clean - Delete most, but leave enough to build external modules
  963. #
  964. clean: rm-dirs := $(CLEAN_DIRS)
  965. clean: rm-files := $(CLEAN_FILES)
  966. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
  967. PHONY += $(clean-dirs) clean archclean
  968. $(clean-dirs):
  969. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  970. clean: archclean $(clean-dirs)
  971. $(call cmd,rmdirs)
  972. $(call cmd,rmfiles)
  973. @find . $(RCS_FIND_IGNORE) \
  974. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  975. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  976. -o -name '*.symtypes' -o -name 'modules.order' \
  977. -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
  978. -type f -print | xargs rm -f
  979. # mrproper - Delete all generated files, including .config
  980. #
  981. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  982. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  983. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  984. PHONY += $(mrproper-dirs) mrproper archmrproper
  985. $(mrproper-dirs):
  986. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  987. mrproper: clean archmrproper $(mrproper-dirs)
  988. $(call cmd,rmdirs)
  989. $(call cmd,rmfiles)
  990. # distclean
  991. #
  992. PHONY += distclean
  993. distclean: mrproper
  994. @find $(srctree) $(RCS_FIND_IGNORE) \
  995. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  996. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  997. -o -name '.*.rej' -o -size 0 \
  998. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  999. -type f -print | xargs rm -f
  1000. # Packaging of the kernel to various formats
  1001. # ---------------------------------------------------------------------------
  1002. # rpm target kept for backward compatibility
  1003. package-dir := $(srctree)/scripts/package
  1004. %pkg: include/config/kernel.release FORCE
  1005. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1006. rpm: include/config/kernel.release FORCE
  1007. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1008. # Brief documentation of the typical targets used
  1009. # ---------------------------------------------------------------------------
  1010. boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
  1011. boards := $(notdir $(boards))
  1012. board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  1013. board-dirs := $(sort $(notdir $(board-dirs:/=)))
  1014. help:
  1015. @echo 'Cleaning targets:'
  1016. @echo ' clean - Remove most generated files but keep the config and'
  1017. @echo ' enough build support to build external modules'
  1018. @echo ' mrproper - Remove all generated files + config + various backup files'
  1019. @echo ' distclean - mrproper + remove editor backup and patch files'
  1020. @echo ''
  1021. @echo 'Configuration targets:'
  1022. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  1023. @echo ''
  1024. @echo 'Other generic targets:'
  1025. @echo ' all - Build all targets marked with [*]'
  1026. @echo '* vmlinux - Build the bare kernel'
  1027. @echo '* modules - Build all modules'
  1028. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  1029. @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
  1030. @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
  1031. @echo ' dir/ - Build all files in dir and below'
  1032. @echo ' dir/file.[ois] - Build specified target only'
  1033. @echo ' dir/file.ko - Build module including final link'
  1034. @echo ' prepare - Set up for building external modules'
  1035. @echo ' tags/TAGS - Generate tags file for editors'
  1036. @echo ' cscope - Generate cscope index'
  1037. @echo ' kernelrelease - Output the release version string'
  1038. @echo ' kernelversion - Output the version stored in Makefile'
  1039. @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  1040. echo ' (default: $(INSTALL_HDR_PATH))'; \
  1041. echo ''
  1042. @echo 'Static analysers'
  1043. @echo ' checkstack - Generate a list of stack hogs'
  1044. @echo ' namespacecheck - Name space analysis on compiled kernel'
  1045. @echo ' versioncheck - Sanity check on version.h usage'
  1046. @echo ' includecheck - Check for duplicate included header files'
  1047. @echo ' export_report - List the usages of all exported symbols'
  1048. @echo ' headers_check - Sanity check on exported headers'; \
  1049. echo ''
  1050. @echo 'Kernel packaging:'
  1051. @$(MAKE) $(build)=$(package-dir) help
  1052. @echo ''
  1053. @echo 'Documentation targets:'
  1054. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  1055. @echo ''
  1056. @echo 'Architecture specific targets ($(SRCARCH)):'
  1057. @$(if $(archhelp),$(archhelp),\
  1058. echo ' No architecture specific help defined for $(SRCARCH)')
  1059. @echo ''
  1060. @$(if $(boards), \
  1061. $(foreach b, $(boards), \
  1062. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  1063. echo '')
  1064. @$(if $(board-dirs), \
  1065. $(foreach b, $(board-dirs), \
  1066. printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
  1067. printf " %-16s - Show all of the above\\n" help-boards; \
  1068. echo '')
  1069. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1070. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  1071. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  1072. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  1073. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  1074. @echo ''
  1075. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  1076. @echo 'For further info see the ./README file'
  1077. help-board-dirs := $(addprefix help-,$(board-dirs))
  1078. help-boards: $(help-board-dirs)
  1079. boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
  1080. $(help-board-dirs): help-%:
  1081. @echo 'Architecture specific targets ($(SRCARCH) $*):'
  1082. @$(if $(boards-per-dir), \
  1083. $(foreach b, $(boards-per-dir), \
  1084. printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
  1085. echo '')
  1086. # Documentation targets
  1087. # ---------------------------------------------------------------------------
  1088. %docs: scripts_basic FORCE
  1089. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  1090. else # KBUILD_EXTMOD
  1091. ###
  1092. # External module support.
  1093. # When building external modules the kernel used as basis is considered
  1094. # read-only, and no consistency checks are made and the make
  1095. # system is not used on the basis kernel. If updates are required
  1096. # in the basis kernel ordinary make commands (without M=...) must
  1097. # be used.
  1098. #
  1099. # The following are the only valid targets when building external
  1100. # modules.
  1101. # make M=dir clean Delete all automatically generated files
  1102. # make M=dir modules Make all modules in specified dir
  1103. # make M=dir Same as 'make M=dir modules'
  1104. # make M=dir modules_install
  1105. # Install the modules built in the module directory
  1106. # Assumes install directory is already created
  1107. # We are always building modules
  1108. KBUILD_MODULES := 1
  1109. PHONY += crmodverdir
  1110. crmodverdir:
  1111. $(cmd_crmodverdir)
  1112. PHONY += $(objtree)/Module.symvers
  1113. $(objtree)/Module.symvers:
  1114. @test -e $(objtree)/Module.symvers || ( \
  1115. echo; \
  1116. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1117. echo " is missing; modules will have no dependencies and modversions."; \
  1118. echo )
  1119. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1120. PHONY += $(module-dirs) modules
  1121. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1122. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1123. modules: $(module-dirs)
  1124. @echo ' Building modules, stage 2.';
  1125. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1126. PHONY += modules_install
  1127. modules_install: _emodinst_ _emodinst_post
  1128. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1129. PHONY += _emodinst_
  1130. _emodinst_:
  1131. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1132. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1133. PHONY += _emodinst_post
  1134. _emodinst_post: _emodinst_
  1135. $(call cmd,depmod)
  1136. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1137. PHONY += $(clean-dirs) clean
  1138. $(clean-dirs):
  1139. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1140. clean: rm-dirs := $(MODVERDIR)
  1141. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1142. clean: $(clean-dirs)
  1143. $(call cmd,rmdirs)
  1144. $(call cmd,rmfiles)
  1145. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  1146. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1147. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  1148. -type f -print | xargs rm -f
  1149. help:
  1150. @echo ' Building external modules.'
  1151. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1152. @echo ''
  1153. @echo ' modules - default target, build the module(s)'
  1154. @echo ' modules_install - install the module'
  1155. @echo ' clean - remove generated files in module directory only'
  1156. @echo ''
  1157. # Dummies...
  1158. PHONY += prepare scripts
  1159. prepare: ;
  1160. scripts: ;
  1161. endif # KBUILD_EXTMOD
  1162. # Generate tags for editors
  1163. # ---------------------------------------------------------------------------
  1164. #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
  1165. #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
  1166. #Adding $(srctree) adds about 20M on i386 to the size of the output file!
  1167. ifeq ($(src),$(obj))
  1168. __srctree =
  1169. else
  1170. __srctree = $(srctree)/
  1171. endif
  1172. ifeq ($(ALLSOURCE_ARCHS),)
  1173. ifeq ($(ARCH),um)
  1174. ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
  1175. else
  1176. ALLINCLUDE_ARCHS := $(SRCARCH)
  1177. endif
  1178. else
  1179. #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
  1180. ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
  1181. endif
  1182. ALLSOURCE_ARCHS := $(SRCARCH)
  1183. define find-sources
  1184. ( for arch in $(ALLSOURCE_ARCHS) ; do \
  1185. find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
  1186. -name $1 -print; \
  1187. done ; \
  1188. find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
  1189. -name $1 -print; \
  1190. find $(__srctree)include $(RCS_FIND_IGNORE) \
  1191. \( -name config -o -name 'asm-*' \) -prune \
  1192. -o -name $1 -print; \
  1193. for arch in $(ALLINCLUDE_ARCHS) ; do \
  1194. test -e $(__srctree)include/asm-$${arch} && \
  1195. find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
  1196. -name $1 -print; \
  1197. test -e $(__srctree)arch/$${arch}/include/asm && \
  1198. find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
  1199. -name $1 -print; \
  1200. done ; \
  1201. find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
  1202. -name $1 -print; \
  1203. find $(__srctree) $(RCS_FIND_IGNORE) \
  1204. \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
  1205. -name $1 -print; \
  1206. )
  1207. endef
  1208. define all-sources
  1209. $(call find-sources,'*.[chS]')
  1210. endef
  1211. define all-kconfigs
  1212. $(call find-sources,'Kconfig*')
  1213. endef
  1214. define all-defconfigs
  1215. $(call find-sources,'defconfig')
  1216. endef
  1217. define xtags
  1218. if $1 --version 2>&1 | grep -iq exuberant; then \
  1219. $(all-sources) | xargs $1 -a \
  1220. -I __initdata,__exitdata,__acquires,__releases \
  1221. -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
  1222. -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
  1223. --extra=+f --c-kinds=+px \
  1224. --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
  1225. $(all-kconfigs) | xargs $1 -a \
  1226. --langdef=kconfig \
  1227. --language-force=kconfig \
  1228. --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
  1229. $(all-defconfigs) | xargs -r $1 -a \
  1230. --langdef=dotconfig \
  1231. --language-force=dotconfig \
  1232. --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
  1233. elif $1 --version 2>&1 | grep -iq emacs; then \
  1234. $(all-sources) | xargs $1 -a; \
  1235. $(all-kconfigs) | xargs $1 -a \
  1236. --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
  1237. $(all-defconfigs) | xargs -r $1 -a \
  1238. --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
  1239. else \
  1240. $(all-sources) | xargs $1 -a; \
  1241. fi
  1242. endef
  1243. quiet_cmd_cscope-file = FILELST cscope.files
  1244. cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
  1245. quiet_cmd_cscope = MAKE cscope.out
  1246. cmd_cscope = cscope -b -f cscope.out
  1247. cscope: FORCE
  1248. $(call cmd,cscope-file)
  1249. $(call cmd,cscope)
  1250. quiet_cmd_TAGS = MAKE $@
  1251. define cmd_TAGS
  1252. rm -f $@; \
  1253. $(call xtags,etags)
  1254. endef
  1255. TAGS: FORCE
  1256. $(call cmd,TAGS)
  1257. quiet_cmd_tags = MAKE $@
  1258. define cmd_tags
  1259. rm -f $@; \
  1260. $(call xtags,ctags)
  1261. endef
  1262. tags: FORCE
  1263. $(call cmd,tags)
  1264. # Scripts to check various things for consistency
  1265. # ---------------------------------------------------------------------------
  1266. includecheck:
  1267. find * $(RCS_FIND_IGNORE) \
  1268. -name '*.[hcS]' -type f -print | sort \
  1269. | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
  1270. versioncheck:
  1271. find * $(RCS_FIND_IGNORE) \
  1272. -name '*.[hcS]' -type f -print | sort \
  1273. | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
  1274. namespacecheck:
  1275. $(PERL) $(srctree)/scripts/namespace.pl
  1276. export_report:
  1277. $(PERL) $(srctree)/scripts/export_report.pl
  1278. endif #ifeq ($(config-targets),1)
  1279. endif #ifeq ($(mixed-targets),1)
  1280. PHONY += checkstack kernelrelease kernelversion
  1281. # UML needs a little special treatment here. It wants to use the host
  1282. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1283. # else wants $(ARCH), including people doing cross-builds, which means
  1284. # that $(SUBARCH) doesn't work here.
  1285. ifeq ($(ARCH), um)
  1286. CHECKSTACK_ARCH := $(SUBARCH)
  1287. else
  1288. CHECKSTACK_ARCH := $(ARCH)
  1289. endif
  1290. checkstack:
  1291. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1292. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1293. kernelrelease:
  1294. $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  1295. $(error kernelrelease not valid - run 'make prepare' to update it))
  1296. kernelversion:
  1297. @echo $(KERNELVERSION)
  1298. # Single targets
  1299. # ---------------------------------------------------------------------------
  1300. # Single targets are compatible with:
  1301. # - build with mixed source and output
  1302. # - build with separate output dir 'make O=...'
  1303. # - external modules
  1304. #
  1305. # target-dir => where to store outputfile
  1306. # build-dir => directory in kernel source tree to use
  1307. ifeq ($(KBUILD_EXTMOD),)
  1308. build-dir = $(patsubst %/,%,$(dir $@))
  1309. target-dir = $(dir $@)
  1310. else
  1311. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1312. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1313. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1314. endif
  1315. %.s: %.c prepare scripts FORCE
  1316. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1317. %.i: %.c prepare scripts FORCE
  1318. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1319. %.o: %.c prepare scripts FORCE
  1320. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1321. %.lst: %.c prepare scripts FORCE
  1322. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1323. %.s: %.S prepare scripts FORCE
  1324. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1325. %.o: %.S prepare scripts FORCE
  1326. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1327. %.symtypes: %.c prepare scripts FORCE
  1328. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1329. # Modules
  1330. / %/: prepare scripts FORCE
  1331. $(cmd_crmodverdir)
  1332. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1333. $(build)=$(build-dir)
  1334. %.ko: prepare scripts FORCE
  1335. $(cmd_crmodverdir)
  1336. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1337. $(build)=$(build-dir) $(@:.ko=.o)
  1338. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1339. # FIXME Should go into a make.lib or something
  1340. # ===========================================================================
  1341. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1342. cmd_rmdirs = rm -rf $(rm-dirs)
  1343. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1344. cmd_rmfiles = rm -f $(rm-files)
  1345. # Run depmod only if we have System.map and depmod is executable
  1346. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1347. cmd_depmod = \
  1348. if [ -r System.map -a -x $(DEPMOD) ]; then \
  1349. $(DEPMOD) -ae -F System.map \
  1350. $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
  1351. $(KERNELRELEASE); \
  1352. fi
  1353. # Create temporary dir for module support files
  1354. # clean it up only when building all modules
  1355. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1356. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1357. a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
  1358. $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
  1359. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1360. quiet_cmd_as_o_S = AS $@
  1361. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1362. # read all saved command lines
  1363. targets := $(wildcard $(sort $(targets)))
  1364. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1365. ifneq ($(cmd_files),)
  1366. $(cmd_files): ; # Do not try to update included dependency files
  1367. include $(cmd_files)
  1368. endif
  1369. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1370. # Usage:
  1371. # $(Q)$(MAKE) $(clean)=dir
  1372. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1373. endif # skip-makefile
  1374. PHONY += FORCE
  1375. FORCE:
  1376. # Declare the contents of the .PHONY variable as phony. We keep that
  1377. # information in a variable se we can use it in if_changed and friends.
  1378. .PHONY: $(PHONY)