Makefile 52 KB

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  1. VERSION = 2
  2. PATCHLEVEL = 6
  3. SUBLEVEL = 32
  4. EXTRAVERSION =
  5. NAME = Man-Eating Seals of Antiquity
  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. ifeq ("$(origin V)", "command line")
  34. KBUILD_VERBOSE = $(V)
  35. endif
  36. ifndef KBUILD_VERBOSE
  37. KBUILD_VERBOSE = 0
  38. endif
  39. # Call a source code checker (by default, "sparse") as part of the
  40. # C compilation.
  41. #
  42. # Use 'make C=1' to enable checking of only re-compiled files.
  43. # Use 'make C=2' to enable checking of *all* source files, regardless
  44. # of whether they are re-compiled or not.
  45. #
  46. # See the file "Documentation/sparse.txt" for more details, including
  47. # where to get the "sparse" utility.
  48. ifeq ("$(origin C)", "command line")
  49. KBUILD_CHECKSRC = $(C)
  50. endif
  51. ifndef KBUILD_CHECKSRC
  52. KBUILD_CHECKSRC = 0
  53. endif
  54. # Use make M=dir to specify directory of external module to build
  55. # Old syntax make ... SUBDIRS=$PWD is still supported
  56. # Setting the environment variable KBUILD_EXTMOD take precedence
  57. ifdef SUBDIRS
  58. KBUILD_EXTMOD ?= $(SUBDIRS)
  59. endif
  60. ifeq ("$(origin M)", "command line")
  61. KBUILD_EXTMOD := $(M)
  62. endif
  63. # kbuild supports saving output files in a separate directory.
  64. # To locate output files in a separate directory two syntaxes are supported.
  65. # In both cases the working directory must be the root of the kernel src.
  66. # 1) O=
  67. # Use "make O=dir/to/store/output/files/"
  68. #
  69. # 2) Set KBUILD_OUTPUT
  70. # Set the environment variable KBUILD_OUTPUT to point to the directory
  71. # where the output files shall be placed.
  72. # export KBUILD_OUTPUT=dir/to/store/output/files/
  73. # make
  74. #
  75. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  76. # variable.
  77. # KBUILD_SRC is set on invocation of make in OBJ directory
  78. # KBUILD_SRC is not intended to be used by the regular user (for now)
  79. ifeq ($(KBUILD_SRC),)
  80. # OK, Make called in directory where kernel src resides
  81. # Do we want to locate output files in a separate directory?
  82. ifeq ("$(origin O)", "command line")
  83. KBUILD_OUTPUT := $(O)
  84. endif
  85. # That's our default target when none is given on the command line
  86. PHONY := _all
  87. _all:
  88. # Cancel implicit rules on top Makefile
  89. $(CURDIR)/Makefile Makefile: ;
  90. ifneq ($(KBUILD_OUTPUT),)
  91. # Invoke a second make in the output directory, passing relevant variables
  92. # check that the output directory actually exists
  93. saved-output := $(KBUILD_OUTPUT)
  94. KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  95. $(if $(KBUILD_OUTPUT),, \
  96. $(error output directory "$(saved-output)" does not exist))
  97. PHONY += $(MAKECMDGOALS) sub-make
  98. $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
  99. $(Q)@:
  100. sub-make: FORCE
  101. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  102. KBUILD_SRC=$(CURDIR) \
  103. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
  104. $(filter-out _all sub-make,$(MAKECMDGOALS))
  105. # Leave processing to above invocation of make
  106. skip-makefile := 1
  107. endif # ifneq ($(KBUILD_OUTPUT),)
  108. endif # ifeq ($(KBUILD_SRC),)
  109. # We process the rest of the Makefile if this is the final invocation of make
  110. ifeq ($(skip-makefile),)
  111. # If building an external module we do not care about the all: rule
  112. # but instead _all depend on modules
  113. PHONY += all
  114. ifeq ($(KBUILD_EXTMOD),)
  115. _all: all
  116. else
  117. _all: modules
  118. endif
  119. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  120. objtree := $(CURDIR)
  121. src := $(srctree)
  122. obj := $(objtree)
  123. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  124. export srctree objtree VPATH
  125. # SUBARCH tells the usermode build what the underlying arch is. That is set
  126. # first, and if a usermode build is happening, the "ARCH=um" on the command
  127. # line overrides the setting of ARCH below. If a native build is happening,
  128. # then ARCH is assigned, getting whatever value it gets normally, and
  129. # SUBARCH is subsequently ignored.
  130. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  131. -e s/arm.*/arm/ -e s/sa110/arm/ \
  132. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  133. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  134. -e s/sh[234].*/sh/ )
  135. # Cross compiling and selecting different set of gcc/bin-utils
  136. # ---------------------------------------------------------------------------
  137. #
  138. # When performing cross compilation for other architectures ARCH shall be set
  139. # to the target architecture. (See arch/* for the possibilities).
  140. # ARCH can be set during invocation of make:
  141. # make ARCH=ia64
  142. # Another way is to have ARCH set in the environment.
  143. # The default ARCH is the host where make is executed.
  144. # CROSS_COMPILE specify the prefix used for all executables used
  145. # during compilation. Only gcc and related bin-utils executables
  146. # are prefixed with $(CROSS_COMPILE).
  147. # CROSS_COMPILE can be set on the command line
  148. # make CROSS_COMPILE=ia64-linux-
  149. # Alternatively CROSS_COMPILE can be set in the environment.
  150. # Default value for CROSS_COMPILE is not to prefix executables
  151. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  152. export KBUILD_BUILDHOST := $(SUBARCH)
  153. ARCH ?= $(SUBARCH)
  154. CROSS_COMPILE ?=
  155. # Architecture as present in compile.h
  156. UTS_MACHINE := $(ARCH)
  157. SRCARCH := $(ARCH)
  158. # Additional ARCH settings for x86
  159. ifeq ($(ARCH),i386)
  160. SRCARCH := x86
  161. endif
  162. ifeq ($(ARCH),x86_64)
  163. SRCARCH := x86
  164. endif
  165. # Additional ARCH settings for sparc
  166. ifeq ($(ARCH),sparc64)
  167. SRCARCH := sparc
  168. endif
  169. # Additional ARCH settings for sh
  170. ifeq ($(ARCH),sh64)
  171. SRCARCH := sh
  172. endif
  173. # Where to locate arch specific headers
  174. hdr-arch := $(SRCARCH)
  175. ifeq ($(ARCH),m68knommu)
  176. hdr-arch := m68k
  177. endif
  178. KCONFIG_CONFIG ?= .config
  179. # SHELL used by kbuild
  180. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  181. else if [ -x /bin/bash ]; then echo /bin/bash; \
  182. else echo sh; fi ; fi)
  183. HOSTCC = gcc
  184. HOSTCXX = g++
  185. HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
  186. HOSTCXXFLAGS = -O2
  187. # Decide whether to build built-in, modular, or both.
  188. # Normally, just do built-in.
  189. KBUILD_MODULES :=
  190. KBUILD_BUILTIN := 1
  191. # If we have only "make modules", don't compile built-in objects.
  192. # When we're building modules with modversions, we need to consider
  193. # the built-in objects during the descend as well, in order to
  194. # make sure the checksums are up to date before we record them.
  195. ifeq ($(MAKECMDGOALS),modules)
  196. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  197. endif
  198. # If we have "make <whatever> modules", compile modules
  199. # in addition to whatever we do anyway.
  200. # Just "make" or "make all" shall build modules as well
  201. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  202. KBUILD_MODULES := 1
  203. endif
  204. ifeq ($(MAKECMDGOALS),)
  205. KBUILD_MODULES := 1
  206. endif
  207. export KBUILD_MODULES KBUILD_BUILTIN
  208. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  209. # Beautify output
  210. # ---------------------------------------------------------------------------
  211. #
  212. # Normally, we echo the whole command before executing it. By making
  213. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  214. # $(quiet) to choose other forms of output instead, e.g.
  215. #
  216. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  217. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  218. #
  219. # If $(quiet) is empty, the whole command will be printed.
  220. # If it is set to "quiet_", only the short version will be printed.
  221. # If it is set to "silent_", nothing will be printed at all, since
  222. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  223. #
  224. # A simple variant is to prefix commands with $(Q) - that's useful
  225. # for commands that shall be hidden in non-verbose mode.
  226. #
  227. # $(Q)ln $@ :<
  228. #
  229. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  230. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  231. ifeq ($(KBUILD_VERBOSE),1)
  232. quiet =
  233. Q =
  234. else
  235. quiet=quiet_
  236. Q = @
  237. endif
  238. # If the user is running make -s (silent mode), suppress echoing of
  239. # commands
  240. ifneq ($(findstring s,$(MAKEFLAGS)),)
  241. quiet=silent_
  242. endif
  243. export quiet Q KBUILD_VERBOSE
  244. # Look for make include files relative to root of kernel src
  245. MAKEFLAGS += --include-dir=$(srctree)
  246. # We need some generic definitions (do not try to remake the file).
  247. $(srctree)/scripts/Kbuild.include: ;
  248. include $(srctree)/scripts/Kbuild.include
  249. # Make variables (CC, etc...)
  250. AS = $(CROSS_COMPILE)as
  251. LD = $(CROSS_COMPILE)ld
  252. CC = $(CROSS_COMPILE)gcc
  253. CPP = $(CC) -E
  254. AR = $(CROSS_COMPILE)ar
  255. NM = $(CROSS_COMPILE)nm
  256. STRIP = $(CROSS_COMPILE)strip
  257. OBJCOPY = $(CROSS_COMPILE)objcopy
  258. OBJDUMP = $(CROSS_COMPILE)objdump
  259. AWK = awk
  260. GENKSYMS = scripts/genksyms/genksyms
  261. INSTALLKERNEL := installkernel
  262. DEPMOD = /sbin/depmod
  263. KALLSYMS = scripts/kallsyms
  264. PERL = perl
  265. CHECK = sparse
  266. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
  267. -Wbitwise -Wno-return-void $(CF)
  268. MODFLAGS = -DMODULE
  269. CFLAGS_MODULE = $(MODFLAGS)
  270. AFLAGS_MODULE = $(MODFLAGS)
  271. LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
  272. CFLAGS_KERNEL =
  273. AFLAGS_KERNEL =
  274. CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
  275. # Use LINUXINCLUDE when you must reference the include/ directory.
  276. # Needed to be compatible with the O= option
  277. LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
  278. $(if $(KBUILD_SRC), -I$(srctree)/include) \
  279. -include include/generated/autoconf.h
  280. KBUILD_CPPFLAGS := -D__KERNEL__
  281. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  282. -fno-strict-aliasing -fno-common \
  283. -Werror-implicit-function-declaration \
  284. -Wno-format-security \
  285. -fno-delete-null-pointer-checks
  286. KBUILD_AFLAGS := -D__ASSEMBLY__
  287. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  288. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  289. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  290. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  291. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  292. export CPP AR NM STRIP OBJCOPY OBJDUMP
  293. export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
  294. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  295. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  296. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
  297. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  298. # When compiling out-of-tree modules, put MODVERDIR in the module
  299. # tree rather than in the kernel tree. The kernel tree might
  300. # even be read-only.
  301. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  302. # Files to ignore in find ... statements
  303. 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
  304. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  305. # ===========================================================================
  306. # Rules shared between *config targets and build targets
  307. # Basic helpers built in scripts/
  308. PHONY += scripts_basic
  309. scripts_basic:
  310. $(Q)$(MAKE) $(build)=scripts/basic
  311. $(Q)rm -f .tmp_quiet_recordmcount
  312. # To avoid any implicit rule to kick in, define an empty command.
  313. scripts/basic/%: scripts_basic ;
  314. PHONY += outputmakefile
  315. # outputmakefile generates a Makefile in the output directory, if using a
  316. # separate output directory. This allows convenient use of make in the
  317. # output directory.
  318. outputmakefile:
  319. ifneq ($(KBUILD_SRC),)
  320. $(Q)ln -fsn $(srctree) source
  321. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  322. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  323. endif
  324. # To make sure we do not include .config for any of the *config targets
  325. # catch them early, and hand them over to scripts/kconfig/Makefile
  326. # It is allowed to specify more targets when calling make, including
  327. # mixing *config targets and build targets.
  328. # For example 'make oldconfig all'.
  329. # Detect when mixed targets is specified, and make a second invocation
  330. # of make so .config is not included in this case either (for *config).
  331. no-dot-config-targets := clean mrproper distclean \
  332. cscope TAGS tags help %docs check% \
  333. include/linux/version.h headers_% \
  334. kernelrelease kernelversion
  335. config-targets := 0
  336. mixed-targets := 0
  337. dot-config := 1
  338. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  339. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  340. dot-config := 0
  341. endif
  342. endif
  343. ifeq ($(KBUILD_EXTMOD),)
  344. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  345. config-targets := 1
  346. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  347. mixed-targets := 1
  348. endif
  349. endif
  350. endif
  351. ifeq ($(mixed-targets),1)
  352. # ===========================================================================
  353. # We're called with mixed targets (*config and build targets).
  354. # Handle them one by one.
  355. %:: FORCE
  356. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  357. else
  358. ifeq ($(config-targets),1)
  359. # ===========================================================================
  360. # *config targets only - make sure prerequisites are updated, and descend
  361. # in scripts/kconfig to make the *config target
  362. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  363. # KBUILD_DEFCONFIG may point out an alternative default configuration
  364. # used for 'make defconfig'
  365. include $(srctree)/arch/$(SRCARCH)/Makefile
  366. export KBUILD_DEFCONFIG KBUILD_KCONFIG
  367. config: scripts_basic outputmakefile FORCE
  368. $(Q)mkdir -p include/linux include/config
  369. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  370. %config: scripts_basic outputmakefile FORCE
  371. $(Q)mkdir -p include/linux include/config
  372. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  373. else
  374. # ===========================================================================
  375. # Build targets only - this includes vmlinux, arch specific targets, clean
  376. # targets and others. In general all targets except *config targets.
  377. ifeq ($(KBUILD_EXTMOD),)
  378. # Additional helpers built in scripts/
  379. # Carefully list dependencies so we do not try to build scripts twice
  380. # in parallel
  381. PHONY += scripts
  382. scripts: scripts_basic include/config/auto.conf
  383. $(Q)$(MAKE) $(build)=$(@)
  384. # Objects we will link into vmlinux / subdirs we need to visit
  385. init-y := init/
  386. drivers-y := drivers/ sound/ firmware/
  387. net-y := net/
  388. libs-y := lib/
  389. core-y := usr/
  390. endif # KBUILD_EXTMOD
  391. ifeq ($(dot-config),1)
  392. # Read in config
  393. -include include/config/auto.conf
  394. ifeq ($(KBUILD_EXTMOD),)
  395. # Read in dependencies to all Kconfig* files, make sure to run
  396. # oldconfig if changes are detected.
  397. -include include/config/auto.conf.cmd
  398. # To avoid any implicit rule to kick in, define an empty command
  399. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  400. # If .config is newer than include/config/auto.conf, someone tinkered
  401. # with it and forgot to run make oldconfig.
  402. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  403. # we execute the config step to be sure to catch updated Kconfig files
  404. include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  405. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  406. else
  407. # external modules needs include/generated/autoconf.h and include/config/auto.conf
  408. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  409. PHONY += include/config/auto.conf
  410. include/config/auto.conf:
  411. $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
  412. echo; \
  413. echo " ERROR: Kernel configuration is invalid."; \
  414. echo " include/generated/autoconf.h or $@ are missing.";\
  415. echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  416. echo; \
  417. /bin/false)
  418. endif # KBUILD_EXTMOD
  419. else
  420. # Dummy target needed, because used as prerequisite
  421. include/config/auto.conf: ;
  422. endif # $(dot-config)
  423. # The all: target is the default when no target is given on the
  424. # command line.
  425. # This allow a user to issue only 'make' to build a kernel including modules
  426. # Defaults vmlinux but it is usually overridden in the arch makefile
  427. all: vmlinux
  428. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  429. KBUILD_CFLAGS += -Os
  430. else
  431. KBUILD_CFLAGS += -O2
  432. endif
  433. include $(srctree)/arch/$(SRCARCH)/Makefile
  434. ifneq ($(CONFIG_FRAME_WARN),0)
  435. KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  436. endif
  437. # Force gcc to behave correct even for buggy distributions
  438. ifndef CONFIG_CC_STACKPROTECTOR
  439. KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
  440. endif
  441. ifdef CONFIG_FRAME_POINTER
  442. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  443. else
  444. KBUILD_CFLAGS += -fomit-frame-pointer
  445. endif
  446. ifdef CONFIG_DEBUG_INFO
  447. KBUILD_CFLAGS += -g
  448. KBUILD_AFLAGS += -gdwarf-2
  449. endif
  450. ifdef CONFIG_FUNCTION_TRACER
  451. KBUILD_CFLAGS += -pg
  452. endif
  453. # We trigger additional mismatches with less inlining
  454. ifdef CONFIG_DEBUG_SECTION_MISMATCH
  455. KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  456. endif
  457. # arch Makefile may override CC so keep this after arch Makefile is included
  458. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  459. CHECKFLAGS += $(NOSTDINC_FLAGS)
  460. # warn about C99 declaration after statement
  461. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  462. # disable pointer signed / unsigned warnings in gcc 4.0
  463. KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  464. # disable invalid "can't wrap" optimizations for signed / pointers
  465. KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
  466. # revert to pre-gcc-4.4 behaviour of .eh_frame
  467. KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
  468. # conserve stack if available
  469. KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
  470. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  471. # But warn user when we do so
  472. warn-assign = \
  473. $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
  474. ifneq ($(KCPPFLAGS),)
  475. $(call warn-assign,CPPFLAGS)
  476. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  477. endif
  478. ifneq ($(KAFLAGS),)
  479. $(call warn-assign,AFLAGS)
  480. KBUILD_AFLAGS += $(KAFLAGS)
  481. endif
  482. ifneq ($(KCFLAGS),)
  483. $(call warn-assign,CFLAGS)
  484. KBUILD_CFLAGS += $(KCFLAGS)
  485. endif
  486. # Use --build-id when available.
  487. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  488. $(call cc-ldoption, -Wl$(comma)--build-id,))
  489. LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  490. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  491. ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
  492. LDFLAGS_vmlinux += $(call ld-option, -X,)
  493. endif
  494. # Default kernel image to build when no specific target is given.
  495. # KBUILD_IMAGE may be overruled on the command line or
  496. # set in the environment
  497. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  498. # this default value
  499. export KBUILD_IMAGE ?= vmlinux
  500. #
  501. # INSTALL_PATH specifies where to place the updated kernel and system map
  502. # images. Default is /boot, but you can set it to other values
  503. export INSTALL_PATH ?= /boot
  504. #
  505. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  506. # relocations required by build roots. This is not defined in the
  507. # makefile but the argument can be passed to make if needed.
  508. #
  509. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  510. export MODLIB
  511. #
  512. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  513. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  514. # the default option --strip-debug will be used. Otherwise,
  515. # INSTALL_MOD_STRIP will used as the options to the strip command.
  516. ifdef INSTALL_MOD_STRIP
  517. ifeq ($(INSTALL_MOD_STRIP),1)
  518. mod_strip_cmd = $(STRIP) --strip-debug
  519. else
  520. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  521. endif # INSTALL_MOD_STRIP=1
  522. else
  523. mod_strip_cmd = true
  524. endif # INSTALL_MOD_STRIP
  525. export mod_strip_cmd
  526. ifeq ($(KBUILD_EXTMOD),)
  527. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  528. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  529. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  530. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  531. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  532. $(init-n) $(init-) \
  533. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  534. $(net-n) $(net-) $(libs-n) $(libs-))))
  535. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  536. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  537. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  538. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  539. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  540. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  541. libs-y := $(libs-y1) $(libs-y2)
  542. # Build vmlinux
  543. # ---------------------------------------------------------------------------
  544. # vmlinux is built from the objects selected by $(vmlinux-init) and
  545. # $(vmlinux-main). Most are built-in.o files from top-level directories
  546. # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  547. # Ordering when linking is important, and $(vmlinux-init) must be first.
  548. #
  549. # vmlinux
  550. # ^
  551. # |
  552. # +-< $(vmlinux-init)
  553. # | +--< init/version.o + more
  554. # |
  555. # +--< $(vmlinux-main)
  556. # | +--< driver/built-in.o mm/built-in.o + more
  557. # |
  558. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  559. #
  560. # vmlinux version (uname -v) cannot be updated during normal
  561. # descending-into-subdirs phase since we do not yet know if we need to
  562. # update vmlinux.
  563. # Therefore this step is delayed until just before final link of vmlinux -
  564. # except in the kallsyms case where it is done just before adding the
  565. # symbols to the kernel.
  566. #
  567. # System.map is generated to document addresses of all kernel symbols
  568. vmlinux-init := $(head-y) $(init-y)
  569. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  570. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  571. vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
  572. export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
  573. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  574. # May be overridden by arch/$(ARCH)/Makefile
  575. quiet_cmd_vmlinux__ ?= LD $@
  576. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  577. -T $(vmlinux-lds) $(vmlinux-init) \
  578. --start-group $(vmlinux-main) --end-group \
  579. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
  580. # Generate new vmlinux version
  581. quiet_cmd_vmlinux_version = GEN .version
  582. cmd_vmlinux_version = set -e; \
  583. if [ ! -r .version ]; then \
  584. rm -f .version; \
  585. echo 1 >.version; \
  586. else \
  587. mv .version .old_version; \
  588. expr 0$$(cat .old_version) + 1 >.version; \
  589. fi; \
  590. $(MAKE) $(build)=init
  591. # Generate System.map
  592. quiet_cmd_sysmap = SYSMAP
  593. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  594. # Link of vmlinux
  595. # If CONFIG_KALLSYMS is set .version is already updated
  596. # Generate System.map and verify that the content is consistent
  597. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  598. # First command is ':' to allow us to use + in front of the rule
  599. define rule_vmlinux__
  600. :
  601. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  602. $(call cmd,vmlinux__)
  603. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  604. $(Q)$(if $($(quiet)cmd_sysmap), \
  605. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  606. $(cmd_sysmap) $@ System.map; \
  607. if [ $$? -ne 0 ]; then \
  608. rm -f $@; \
  609. /bin/false; \
  610. fi;
  611. $(verify_kallsyms)
  612. endef
  613. ifdef CONFIG_KALLSYMS
  614. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  615. # It's a three stage process:
  616. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  617. # empty
  618. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  619. # the right size - vmlinux version (uname -v) is updated during this step
  620. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  621. # but due to the added section, some addresses have shifted.
  622. # From here, we generate a correct .tmp_kallsyms2.o
  623. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  624. # o Verify that the System.map from vmlinux matches the map from
  625. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  626. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  627. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  628. # temporary bypass to allow the kernel to be built while the
  629. # maintainers work out what went wrong with kallsyms.
  630. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  631. last_kallsyms := 3
  632. else
  633. last_kallsyms := 2
  634. endif
  635. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  636. define verify_kallsyms
  637. $(Q)$(if $($(quiet)cmd_sysmap), \
  638. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  639. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  640. $(Q)cmp -s System.map .tmp_System.map || \
  641. (echo Inconsistent kallsyms data; \
  642. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  643. rm .tmp_kallsyms* ; /bin/false )
  644. endef
  645. # Update vmlinux version before link
  646. # Use + in front of this rule to silent warning about make -j1
  647. # First command is ':' to allow us to use + in front of this rule
  648. cmd_ksym_ld = $(cmd_vmlinux__)
  649. define rule_ksym_ld
  650. :
  651. +$(call cmd,vmlinux_version)
  652. $(call cmd,vmlinux__)
  653. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  654. endef
  655. # Generate .S file with all kernel symbols
  656. quiet_cmd_kallsyms = KSYM $@
  657. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  658. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  659. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  660. $(call if_changed_dep,as_o_S)
  661. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  662. $(call cmd,kallsyms)
  663. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  664. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  665. $(call if_changed_rule,ksym_ld)
  666. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  667. $(call if_changed,vmlinux__)
  668. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  669. $(call if_changed,vmlinux__)
  670. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  671. $(KALLSYMS): scripts ;
  672. # Generate some data for debugging strange kallsyms problems
  673. debug_kallsyms: .tmp_map$(last_kallsyms)
  674. .tmp_map%: .tmp_vmlinux% FORCE
  675. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  676. .tmp_map3: .tmp_map2
  677. .tmp_map2: .tmp_map1
  678. endif # ifdef CONFIG_KALLSYMS
  679. # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
  680. # relevant sections renamed as per the linker script.
  681. quiet_cmd_vmlinux-modpost = LD $@
  682. cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
  683. $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
  684. $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
  685. define rule_vmlinux-modpost
  686. :
  687. +$(call cmd,vmlinux-modpost)
  688. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  689. $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
  690. endef
  691. # vmlinux image - including updated kernel symbols
  692. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
  693. ifdef CONFIG_HEADERS_CHECK
  694. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  695. endif
  696. ifdef CONFIG_SAMPLES
  697. $(Q)$(MAKE) $(build)=samples
  698. endif
  699. ifdef CONFIG_BUILD_DOCSRC
  700. $(Q)$(MAKE) $(build)=Documentation
  701. endif
  702. $(call vmlinux-modpost)
  703. $(call if_changed_rule,vmlinux__)
  704. $(Q)rm -f .old_version
  705. # build vmlinux.o first to catch section mismatch errors early
  706. ifdef CONFIG_KALLSYMS
  707. .tmp_vmlinux1: vmlinux.o
  708. endif
  709. modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
  710. vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
  711. $(call if_changed_rule,vmlinux-modpost)
  712. # The actual objects are generated when descending,
  713. # make sure no implicit rule kicks in
  714. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  715. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  716. # Preset locale variables to speed up the build process. Limit locale
  717. # tweaks to this spot to avoid wrong language settings when running
  718. # make menuconfig etc.
  719. # Error messages still appears in the original language
  720. PHONY += $(vmlinux-dirs)
  721. $(vmlinux-dirs): prepare scripts
  722. $(Q)$(MAKE) $(build)=$@
  723. # Build the kernel release string
  724. #
  725. # The KERNELRELEASE value built here is stored in the file
  726. # include/config/kernel.release, and is used when executing several
  727. # make targets, such as "make install" or "make modules_install."
  728. #
  729. # The eventual kernel release string consists of the following fields,
  730. # shown in a hierarchical format to show how smaller parts are concatenated
  731. # to form the larger and final value, with values coming from places like
  732. # the Makefile, kernel config options, make command line options and/or
  733. # SCM tag information.
  734. #
  735. # $(KERNELVERSION)
  736. # $(VERSION) eg, 2
  737. # $(PATCHLEVEL) eg, 6
  738. # $(SUBLEVEL) eg, 18
  739. # $(EXTRAVERSION) eg, -rc6
  740. # $(localver-full)
  741. # $(localver)
  742. # localversion* (files without backups, containing '~')
  743. # $(CONFIG_LOCALVERSION) (from kernel config setting)
  744. # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
  745. # ./scripts/setlocalversion (SCM tag, if one exists)
  746. # $(LOCALVERSION) (from make command line if provided)
  747. #
  748. # Note how the final $(localver-auto) string is included *only* if the
  749. # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
  750. # moment, only git is supported but other SCMs can edit the script
  751. # scripts/setlocalversion and add the appropriate checks as needed.
  752. pattern = ".*/localversion[^~]*"
  753. string = $(shell cat /dev/null \
  754. `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
  755. localver = $(subst $(space),, $(string) \
  756. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  757. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  758. # and if the SCM is know a tag from the SCM is appended.
  759. # The appended tag is determined by the SCM used.
  760. #
  761. # .scmversion is used when generating rpm packages so we do not loose
  762. # the version information from the SCM when we do the build of the kernel
  763. # from the copied source
  764. ifdef CONFIG_LOCALVERSION_AUTO
  765. ifeq ($(wildcard .scmversion),)
  766. _localver-auto = $(shell $(CONFIG_SHELL) \
  767. $(srctree)/scripts/setlocalversion $(srctree))
  768. else
  769. _localver-auto = $(shell cat .scmversion 2> /dev/null)
  770. endif
  771. localver-auto = $(LOCALVERSION)$(_localver-auto)
  772. endif
  773. localver-full = $(localver)$(localver-auto)
  774. # Store (new) KERNELRELASE string in include/config/kernel.release
  775. kernelrelease = $(KERNELVERSION)$(localver-full)
  776. include/config/kernel.release: include/config/auto.conf FORCE
  777. $(Q)rm -f $@
  778. $(Q)echo $(kernelrelease) > $@
  779. # Things we need to do before we recursively start building the kernel
  780. # or the modules are listed in "prepare".
  781. # A multi level approach is used. prepareN is processed before prepareN-1.
  782. # archprepare is used in arch Makefiles and when processed asm symlink,
  783. # version.h and scripts_basic is processed / created.
  784. # Listed in dependency order
  785. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  786. # prepare3 is used to check if we are building in a separate output directory,
  787. # and if so do:
  788. # 1) Check that make has not been executed in the kernel src $(srctree)
  789. prepare3: include/config/kernel.release
  790. ifneq ($(KBUILD_SRC),)
  791. @$(kecho) ' Using $(srctree) as source for kernel'
  792. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  793. echo " $(srctree) is not clean, please run 'make mrproper'";\
  794. echo " in the '$(srctree)' directory.";\
  795. /bin/false; \
  796. fi;
  797. endif
  798. # prepare2 creates a makefile if using a separate output directory
  799. prepare2: prepare3 outputmakefile
  800. prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
  801. include/config/auto.conf
  802. $(cmd_crmodverdir)
  803. archprepare: prepare1 scripts_basic
  804. prepare0: archprepare FORCE
  805. $(Q)$(MAKE) $(build)=.
  806. $(Q)$(MAKE) $(build)=. missing-syscalls
  807. # All the preparing..
  808. prepare: prepare0
  809. # Generate some files
  810. # ---------------------------------------------------------------------------
  811. # KERNELRELEASE can change from a few different places, meaning version.h
  812. # needs to be updated, so this check is forced on all builds
  813. uts_len := 64
  814. define filechk_utsrelease.h
  815. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  816. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  817. exit 1; \
  818. fi; \
  819. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  820. endef
  821. define filechk_version.h
  822. (echo \#define LINUX_VERSION_CODE $(shell \
  823. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  824. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  825. endef
  826. include/linux/version.h: $(srctree)/Makefile FORCE
  827. $(call filechk,version.h)
  828. include/generated/utsrelease.h: include/config/kernel.release FORCE
  829. $(call filechk,utsrelease.h)
  830. PHONY += headerdep
  831. headerdep:
  832. $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
  833. # ---------------------------------------------------------------------------
  834. PHONY += depend dep
  835. depend dep:
  836. @echo '*** Warning: make $@ is unnecessary now.'
  837. # ---------------------------------------------------------------------------
  838. # Firmware install
  839. INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
  840. export INSTALL_FW_PATH
  841. PHONY += firmware_install
  842. firmware_install: FORCE
  843. @mkdir -p $(objtree)/firmware
  844. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
  845. # ---------------------------------------------------------------------------
  846. # Kernel headers
  847. #Default location for installed headers
  848. export INSTALL_HDR_PATH = $(objtree)/usr
  849. hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
  850. # If we do an all arch process set dst to asm-$(hdr-arch)
  851. hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
  852. PHONY += __headers
  853. __headers: include/linux/version.h scripts_basic FORCE
  854. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  855. PHONY += headers_install_all
  856. headers_install_all:
  857. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
  858. PHONY += headers_install
  859. headers_install: __headers
  860. $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
  861. $(error Headers not exportable for the $(SRCARCH) architecture))
  862. $(Q)$(MAKE) $(hdr-inst)=include
  863. $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
  864. PHONY += headers_check_all
  865. headers_check_all: headers_install_all
  866. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
  867. PHONY += headers_check
  868. headers_check: headers_install
  869. $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
  870. $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
  871. # ---------------------------------------------------------------------------
  872. # Modules
  873. ifdef CONFIG_MODULES
  874. # By default, build modules as well
  875. all: modules
  876. # Build modules
  877. #
  878. # A module can be listed more than once in obj-m resulting in
  879. # duplicate lines in modules.order files. Those are removed
  880. # using awk while concatenating to the final file.
  881. PHONY += modules
  882. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  883. $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
  884. @$(kecho) ' Building modules, stage 2.';
  885. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  886. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
  887. # Target to prepare building external modules
  888. PHONY += modules_prepare
  889. modules_prepare: prepare scripts
  890. # Target to install modules
  891. PHONY += modules_install
  892. modules_install: _modinst_ _modinst_post
  893. PHONY += _modinst_
  894. _modinst_:
  895. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  896. echo "Warning: you may need to install module-init-tools"; \
  897. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  898. sleep 1; \
  899. fi
  900. @rm -rf $(MODLIB)/kernel
  901. @rm -f $(MODLIB)/source
  902. @mkdir -p $(MODLIB)/kernel
  903. @ln -s $(srctree) $(MODLIB)/source
  904. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  905. rm -f $(MODLIB)/build ; \
  906. ln -s $(objtree) $(MODLIB)/build ; \
  907. fi
  908. @cp -f $(objtree)/modules.order $(MODLIB)/
  909. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  910. # This depmod is only for convenience to give the initial
  911. # boot a modules.dep even before / is mounted read-write. However the
  912. # boot script depmod is the master version.
  913. PHONY += _modinst_post
  914. _modinst_post: _modinst_
  915. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
  916. $(call cmd,depmod)
  917. else # CONFIG_MODULES
  918. # Modules not configured
  919. # ---------------------------------------------------------------------------
  920. modules modules_install: FORCE
  921. @echo
  922. @echo "The present kernel configuration has modules disabled."
  923. @echo "Type 'make config' and enable loadable module support."
  924. @echo "Then build a kernel with module support enabled."
  925. @echo
  926. @exit 1
  927. endif # CONFIG_MODULES
  928. ###
  929. # Cleaning is done on three levels.
  930. # make clean Delete most generated files
  931. # Leave enough to build external modules
  932. # make mrproper Delete the current configuration, and all generated files
  933. # make distclean Remove editor backup files, patch leftover files and the like
  934. # Directories & files removed with 'make clean'
  935. CLEAN_DIRS += $(MODVERDIR)
  936. CLEAN_FILES += vmlinux System.map \
  937. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  938. # Directories & files removed with 'make mrproper'
  939. MRPROPER_DIRS += include/config usr/include include/generated
  940. MRPROPER_FILES += .config .config.old .version .old_version \
  941. include/linux/version.h \
  942. Module.symvers tags TAGS cscope*
  943. # clean - Delete most, but leave enough to build external modules
  944. #
  945. clean: rm-dirs := $(CLEAN_DIRS)
  946. clean: rm-files := $(CLEAN_FILES)
  947. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
  948. PHONY += $(clean-dirs) clean archclean
  949. $(clean-dirs):
  950. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  951. clean: archclean $(clean-dirs)
  952. $(call cmd,rmdirs)
  953. $(call cmd,rmfiles)
  954. @find . $(RCS_FIND_IGNORE) \
  955. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  956. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  957. -o -name '*.symtypes' -o -name 'modules.order' \
  958. -o -name '.tmp_*.o.*' \
  959. -o -name '*.gcno' \) -type f -print | xargs rm -f
  960. # mrproper - Delete all generated files, including .config
  961. #
  962. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  963. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  964. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  965. PHONY += $(mrproper-dirs) mrproper archmrproper
  966. $(mrproper-dirs):
  967. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  968. mrproper: clean archmrproper $(mrproper-dirs)
  969. $(call cmd,rmdirs)
  970. $(call cmd,rmfiles)
  971. # distclean
  972. #
  973. PHONY += distclean
  974. distclean: mrproper
  975. @find $(srctree) $(RCS_FIND_IGNORE) \
  976. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  977. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  978. -o -name '.*.rej' -o -size 0 \
  979. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  980. -type f -print | xargs rm -f
  981. # Packaging of the kernel to various formats
  982. # ---------------------------------------------------------------------------
  983. # rpm target kept for backward compatibility
  984. package-dir := $(srctree)/scripts/package
  985. %pkg: include/config/kernel.release FORCE
  986. $(Q)$(MAKE) $(build)=$(package-dir) $@
  987. rpm: include/config/kernel.release FORCE
  988. $(Q)$(MAKE) $(build)=$(package-dir) $@
  989. # Brief documentation of the typical targets used
  990. # ---------------------------------------------------------------------------
  991. boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
  992. boards := $(notdir $(boards))
  993. board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  994. board-dirs := $(sort $(notdir $(board-dirs:/=)))
  995. help:
  996. @echo 'Cleaning targets:'
  997. @echo ' clean - Remove most generated files but keep the config and'
  998. @echo ' enough build support to build external modules'
  999. @echo ' mrproper - Remove all generated files + config + various backup files'
  1000. @echo ' distclean - mrproper + remove editor backup and patch files'
  1001. @echo ''
  1002. @echo 'Configuration targets:'
  1003. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  1004. @echo ''
  1005. @echo 'Other generic targets:'
  1006. @echo ' all - Build all targets marked with [*]'
  1007. @echo '* vmlinux - Build the bare kernel'
  1008. @echo '* modules - Build all modules'
  1009. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  1010. @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
  1011. @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
  1012. @echo ' dir/ - Build all files in dir and below'
  1013. @echo ' dir/file.[ois] - Build specified target only'
  1014. @echo ' dir/file.ko - Build module including final link'
  1015. @echo ' modules_prepare - Set up for building external modules'
  1016. @echo ' tags/TAGS - Generate tags file for editors'
  1017. @echo ' cscope - Generate cscope index'
  1018. @echo ' kernelrelease - Output the release version string'
  1019. @echo ' kernelversion - Output the version stored in Makefile'
  1020. @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  1021. echo ' (default: $(INSTALL_HDR_PATH))'; \
  1022. echo ''
  1023. @echo 'Static analysers'
  1024. @echo ' checkstack - Generate a list of stack hogs'
  1025. @echo ' namespacecheck - Name space analysis on compiled kernel'
  1026. @echo ' versioncheck - Sanity check on version.h usage'
  1027. @echo ' includecheck - Check for duplicate included header files'
  1028. @echo ' export_report - List the usages of all exported symbols'
  1029. @echo ' headers_check - Sanity check on exported headers'
  1030. @echo ' headerdep - Detect inclusion cycles in headers'; \
  1031. echo ''
  1032. @echo 'Kernel packaging:'
  1033. @$(MAKE) $(build)=$(package-dir) help
  1034. @echo ''
  1035. @echo 'Documentation targets:'
  1036. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  1037. @echo ''
  1038. @echo 'Architecture specific targets ($(SRCARCH)):'
  1039. @$(if $(archhelp),$(archhelp),\
  1040. echo ' No architecture specific help defined for $(SRCARCH)')
  1041. @echo ''
  1042. @$(if $(boards), \
  1043. $(foreach b, $(boards), \
  1044. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  1045. echo '')
  1046. @$(if $(board-dirs), \
  1047. $(foreach b, $(board-dirs), \
  1048. printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
  1049. printf " %-16s - Show all of the above\\n" help-boards; \
  1050. echo '')
  1051. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1052. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  1053. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  1054. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  1055. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  1056. @echo ''
  1057. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  1058. @echo 'For further info see the ./README file'
  1059. help-board-dirs := $(addprefix help-,$(board-dirs))
  1060. help-boards: $(help-board-dirs)
  1061. boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
  1062. $(help-board-dirs): help-%:
  1063. @echo 'Architecture specific targets ($(SRCARCH) $*):'
  1064. @$(if $(boards-per-dir), \
  1065. $(foreach b, $(boards-per-dir), \
  1066. printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
  1067. echo '')
  1068. # Documentation targets
  1069. # ---------------------------------------------------------------------------
  1070. %docs: scripts_basic FORCE
  1071. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  1072. else # KBUILD_EXTMOD
  1073. ###
  1074. # External module support.
  1075. # When building external modules the kernel used as basis is considered
  1076. # read-only, and no consistency checks are made and the make
  1077. # system is not used on the basis kernel. If updates are required
  1078. # in the basis kernel ordinary make commands (without M=...) must
  1079. # be used.
  1080. #
  1081. # The following are the only valid targets when building external
  1082. # modules.
  1083. # make M=dir clean Delete all automatically generated files
  1084. # make M=dir modules Make all modules in specified dir
  1085. # make M=dir Same as 'make M=dir modules'
  1086. # make M=dir modules_install
  1087. # Install the modules built in the module directory
  1088. # Assumes install directory is already created
  1089. # We are always building modules
  1090. KBUILD_MODULES := 1
  1091. PHONY += crmodverdir
  1092. crmodverdir:
  1093. $(cmd_crmodverdir)
  1094. PHONY += $(objtree)/Module.symvers
  1095. $(objtree)/Module.symvers:
  1096. @test -e $(objtree)/Module.symvers || ( \
  1097. echo; \
  1098. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1099. echo " is missing; modules will have no dependencies and modversions."; \
  1100. echo )
  1101. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1102. PHONY += $(module-dirs) modules
  1103. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1104. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1105. modules: $(module-dirs)
  1106. @$(kecho) ' Building modules, stage 2.';
  1107. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1108. PHONY += modules_install
  1109. modules_install: _emodinst_ _emodinst_post
  1110. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1111. PHONY += _emodinst_
  1112. _emodinst_:
  1113. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1114. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1115. PHONY += _emodinst_post
  1116. _emodinst_post: _emodinst_
  1117. $(call cmd,depmod)
  1118. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1119. PHONY += $(clean-dirs) clean
  1120. $(clean-dirs):
  1121. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1122. clean: rm-dirs := $(MODVERDIR)
  1123. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
  1124. $(KBUILD_EXTMOD)/modules.order
  1125. clean: $(clean-dirs)
  1126. $(call cmd,rmdirs)
  1127. $(call cmd,rmfiles)
  1128. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  1129. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1130. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  1131. -o -name '*.gcno' \) -type f -print | xargs rm -f
  1132. help:
  1133. @echo ' Building external modules.'
  1134. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1135. @echo ''
  1136. @echo ' modules - default target, build the module(s)'
  1137. @echo ' modules_install - install the module'
  1138. @echo ' clean - remove generated files in module directory only'
  1139. @echo ''
  1140. # Dummies...
  1141. PHONY += prepare scripts
  1142. prepare: ;
  1143. scripts: ;
  1144. endif # KBUILD_EXTMOD
  1145. # Generate tags for editors
  1146. # ---------------------------------------------------------------------------
  1147. quiet_cmd_tags = GEN $@
  1148. cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
  1149. tags TAGS cscope: FORCE
  1150. $(call cmd,tags)
  1151. # Scripts to check various things for consistency
  1152. # ---------------------------------------------------------------------------
  1153. includecheck:
  1154. find * $(RCS_FIND_IGNORE) \
  1155. -name '*.[hcS]' -type f -print | sort \
  1156. | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
  1157. versioncheck:
  1158. find * $(RCS_FIND_IGNORE) \
  1159. -name '*.[hcS]' -type f -print | sort \
  1160. | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
  1161. namespacecheck:
  1162. $(PERL) $(srctree)/scripts/namespace.pl
  1163. export_report:
  1164. $(PERL) $(srctree)/scripts/export_report.pl
  1165. endif #ifeq ($(config-targets),1)
  1166. endif #ifeq ($(mixed-targets),1)
  1167. PHONY += checkstack kernelrelease kernelversion
  1168. # UML needs a little special treatment here. It wants to use the host
  1169. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1170. # else wants $(ARCH), including people doing cross-builds, which means
  1171. # that $(SUBARCH) doesn't work here.
  1172. ifeq ($(ARCH), um)
  1173. CHECKSTACK_ARCH := $(SUBARCH)
  1174. else
  1175. CHECKSTACK_ARCH := $(ARCH)
  1176. endif
  1177. checkstack:
  1178. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1179. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1180. kernelrelease:
  1181. $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  1182. $(error kernelrelease not valid - run 'make prepare' to update it))
  1183. kernelversion:
  1184. @echo $(KERNELVERSION)
  1185. # Single targets
  1186. # ---------------------------------------------------------------------------
  1187. # Single targets are compatible with:
  1188. # - build with mixed source and output
  1189. # - build with separate output dir 'make O=...'
  1190. # - external modules
  1191. #
  1192. # target-dir => where to store outputfile
  1193. # build-dir => directory in kernel source tree to use
  1194. ifeq ($(KBUILD_EXTMOD),)
  1195. build-dir = $(patsubst %/,%,$(dir $@))
  1196. target-dir = $(dir $@)
  1197. else
  1198. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1199. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1200. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1201. endif
  1202. %.s: %.c prepare scripts FORCE
  1203. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1204. %.i: %.c prepare scripts FORCE
  1205. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1206. %.o: %.c prepare scripts FORCE
  1207. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1208. %.lst: %.c prepare scripts FORCE
  1209. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1210. %.s: %.S prepare scripts FORCE
  1211. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1212. %.o: %.S prepare scripts FORCE
  1213. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1214. %.symtypes: %.c prepare scripts FORCE
  1215. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1216. # Modules
  1217. /: prepare scripts FORCE
  1218. $(cmd_crmodverdir)
  1219. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1220. $(build)=$(build-dir)
  1221. %/: prepare scripts FORCE
  1222. $(cmd_crmodverdir)
  1223. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1224. $(build)=$(build-dir)
  1225. %.ko: prepare scripts FORCE
  1226. $(cmd_crmodverdir)
  1227. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1228. $(build)=$(build-dir) $(@:.ko=.o)
  1229. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1230. # FIXME Should go into a make.lib or something
  1231. # ===========================================================================
  1232. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1233. cmd_rmdirs = rm -rf $(rm-dirs)
  1234. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1235. cmd_rmfiles = rm -f $(rm-files)
  1236. # Run depmod only if we have System.map and depmod is executable
  1237. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1238. cmd_depmod = \
  1239. if [ -r System.map -a -x $(DEPMOD) ]; then \
  1240. $(DEPMOD) -ae -F System.map \
  1241. $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
  1242. $(KERNELRELEASE); \
  1243. fi
  1244. # Create temporary dir for module support files
  1245. # clean it up only when building all modules
  1246. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1247. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1248. a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
  1249. $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
  1250. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1251. quiet_cmd_as_o_S = AS $@
  1252. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1253. # read all saved command lines
  1254. targets := $(wildcard $(sort $(targets)))
  1255. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1256. ifneq ($(cmd_files),)
  1257. $(cmd_files): ; # Do not try to update included dependency files
  1258. include $(cmd_files)
  1259. endif
  1260. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1261. # Usage:
  1262. # $(Q)$(MAKE) $(clean)=dir
  1263. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1264. endif # skip-makefile
  1265. PHONY += FORCE
  1266. FORCE:
  1267. # Declare the contents of the .PHONY variable as phony. We keep that
  1268. # information in a variable so we can use it in if_changed and friends.
  1269. .PHONY: $(PHONY)