Makefile 54 KB

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  1. VERSION = 2
  2. PATCHLEVEL = 6
  3. SUBLEVEL = 30
  4. EXTRAVERSION = -rc6
  5. NAME = Vindictive Armadillo
  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[234].*/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 ($(ARCH),x86_64)
  173. SRCARCH := x86
  174. endif
  175. # Additional ARCH settings for sparc
  176. ifeq ($(ARCH),sparc64)
  177. SRCARCH := sparc
  178. endif
  179. # Additional ARCH settings for sh
  180. ifeq ($(ARCH),sh64)
  181. SRCARCH := sh
  182. endif
  183. # Where to locate arch specific headers
  184. hdr-arch := $(SRCARCH)
  185. ifeq ($(ARCH),m68knommu)
  186. hdr-arch := m68k
  187. endif
  188. KCONFIG_CONFIG ?= .config
  189. # SHELL used by kbuild
  190. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  191. else if [ -x /bin/bash ]; then echo /bin/bash; \
  192. else echo sh; fi ; fi)
  193. HOSTCC = gcc
  194. HOSTCXX = g++
  195. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  196. HOSTCXXFLAGS = -O2
  197. # Decide whether to build built-in, modular, or both.
  198. # Normally, just do built-in.
  199. KBUILD_MODULES :=
  200. KBUILD_BUILTIN := 1
  201. # If we have only "make modules", don't compile built-in objects.
  202. # When we're building modules with modversions, we need to consider
  203. # the built-in objects during the descend as well, in order to
  204. # make sure the checksums are up to date before we record them.
  205. ifeq ($(MAKECMDGOALS),modules)
  206. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  207. endif
  208. # If we have "make <whatever> modules", compile modules
  209. # in addition to whatever we do anyway.
  210. # Just "make" or "make all" shall build modules as well
  211. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  212. KBUILD_MODULES := 1
  213. endif
  214. ifeq ($(MAKECMDGOALS),)
  215. KBUILD_MODULES := 1
  216. endif
  217. export KBUILD_MODULES KBUILD_BUILTIN
  218. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  219. # Beautify output
  220. # ---------------------------------------------------------------------------
  221. #
  222. # Normally, we echo the whole command before executing it. By making
  223. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  224. # $(quiet) to choose other forms of output instead, e.g.
  225. #
  226. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  227. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  228. #
  229. # If $(quiet) is empty, the whole command will be printed.
  230. # If it is set to "quiet_", only the short version will be printed.
  231. # If it is set to "silent_", nothing will be printed at all, since
  232. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  233. #
  234. # A simple variant is to prefix commands with $(Q) - that's useful
  235. # for commands that shall be hidden in non-verbose mode.
  236. #
  237. # $(Q)ln $@ :<
  238. #
  239. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  240. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  241. ifeq ($(KBUILD_VERBOSE),1)
  242. quiet =
  243. Q =
  244. else
  245. quiet=quiet_
  246. Q = @
  247. endif
  248. # If the user is running make -s (silent mode), suppress echoing of
  249. # commands
  250. ifneq ($(findstring s,$(MAKEFLAGS)),)
  251. quiet=silent_
  252. endif
  253. export quiet Q KBUILD_VERBOSE
  254. # Look for make include files relative to root of kernel src
  255. MAKEFLAGS += --include-dir=$(srctree)
  256. # We need some generic definitions (do not try to remake the file).
  257. $(srctree)/scripts/Kbuild.include: ;
  258. include $(srctree)/scripts/Kbuild.include
  259. # Make variables (CC, etc...)
  260. AS = $(CROSS_COMPILE)as
  261. LD = $(CROSS_COMPILE)ld
  262. CC = $(CROSS_COMPILE)gcc
  263. CPP = $(CC) -E
  264. AR = $(CROSS_COMPILE)ar
  265. NM = $(CROSS_COMPILE)nm
  266. STRIP = $(CROSS_COMPILE)strip
  267. OBJCOPY = $(CROSS_COMPILE)objcopy
  268. OBJDUMP = $(CROSS_COMPILE)objdump
  269. AWK = awk
  270. GENKSYMS = scripts/genksyms/genksyms
  271. DEPMOD = /sbin/depmod
  272. KALLSYMS = scripts/kallsyms
  273. PERL = perl
  274. CHECK = sparse
  275. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
  276. -Wbitwise -Wno-return-void $(CF)
  277. MODFLAGS = -DMODULE
  278. CFLAGS_MODULE = $(MODFLAGS)
  279. AFLAGS_MODULE = $(MODFLAGS)
  280. LDFLAGS_MODULE =
  281. CFLAGS_KERNEL =
  282. AFLAGS_KERNEL =
  283. # Use LINUXINCLUDE when you must reference the include/ directory.
  284. # Needed to be compatible with the O= option
  285. LINUXINCLUDE := -Iinclude \
  286. $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
  287. -I$(srctree)/arch/$(hdr-arch)/include \
  288. -include include/linux/autoconf.h
  289. KBUILD_CPPFLAGS := -D__KERNEL__
  290. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  291. -fno-strict-aliasing -fno-common \
  292. -Werror-implicit-function-declaration
  293. KBUILD_AFLAGS := -D__ASSEMBLY__
  294. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  295. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  296. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  297. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  298. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  299. export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
  300. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  301. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  302. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
  303. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  304. # When compiling out-of-tree modules, put MODVERDIR in the module
  305. # tree rather than in the kernel tree. The kernel tree might
  306. # even be read-only.
  307. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  308. # Files to ignore in find ... statements
  309. 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
  310. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  311. # ===========================================================================
  312. # Rules shared between *config targets and build targets
  313. # Basic helpers built in scripts/
  314. PHONY += scripts_basic
  315. scripts_basic:
  316. $(Q)$(MAKE) $(build)=scripts/basic
  317. # To avoid any implicit rule to kick in, define an empty command.
  318. scripts/basic/%: scripts_basic ;
  319. PHONY += outputmakefile
  320. # outputmakefile generates a Makefile in the output directory, if using a
  321. # separate output directory. This allows convenient use of make in the
  322. # output directory.
  323. outputmakefile:
  324. ifneq ($(KBUILD_SRC),)
  325. $(Q)ln -fsn $(srctree) source
  326. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  327. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  328. endif
  329. # To make sure we do not include .config for any of the *config targets
  330. # catch them early, and hand them over to scripts/kconfig/Makefile
  331. # It is allowed to specify more targets when calling make, including
  332. # mixing *config targets and build targets.
  333. # For example 'make oldconfig all'.
  334. # Detect when mixed targets is specified, and make a second invocation
  335. # of make so .config is not included in this case either (for *config).
  336. no-dot-config-targets := clean mrproper distclean \
  337. cscope TAGS tags help %docs check% \
  338. include/linux/version.h headers_% \
  339. kernelrelease kernelversion
  340. config-targets := 0
  341. mixed-targets := 0
  342. dot-config := 1
  343. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  344. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  345. dot-config := 0
  346. endif
  347. endif
  348. ifeq ($(KBUILD_EXTMOD),)
  349. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  350. config-targets := 1
  351. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  352. mixed-targets := 1
  353. endif
  354. endif
  355. endif
  356. ifeq ($(mixed-targets),1)
  357. # ===========================================================================
  358. # We're called with mixed targets (*config and build targets).
  359. # Handle them one by one.
  360. %:: FORCE
  361. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  362. else
  363. ifeq ($(config-targets),1)
  364. # ===========================================================================
  365. # *config targets only - make sure prerequisites are updated, and descend
  366. # in scripts/kconfig to make the *config target
  367. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  368. # KBUILD_DEFCONFIG may point out an alternative default configuration
  369. # used for 'make defconfig'
  370. include $(srctree)/arch/$(SRCARCH)/Makefile
  371. export KBUILD_DEFCONFIG KBUILD_KCONFIG
  372. config: scripts_basic outputmakefile FORCE
  373. $(Q)mkdir -p include/linux include/config
  374. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  375. %config: scripts_basic outputmakefile FORCE
  376. $(Q)mkdir -p include/linux include/config
  377. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  378. else
  379. # ===========================================================================
  380. # Build targets only - this includes vmlinux, arch specific targets, clean
  381. # targets and others. In general all targets except *config targets.
  382. ifeq ($(KBUILD_EXTMOD),)
  383. # Additional helpers built in scripts/
  384. # Carefully list dependencies so we do not try to build scripts twice
  385. # in parallel
  386. PHONY += scripts
  387. scripts: scripts_basic include/config/auto.conf
  388. $(Q)$(MAKE) $(build)=$(@)
  389. # Objects we will link into vmlinux / subdirs we need to visit
  390. init-y := init/
  391. drivers-y := drivers/ sound/ firmware/
  392. net-y := net/
  393. libs-y := lib/
  394. core-y := usr/
  395. endif # KBUILD_EXTMOD
  396. ifeq ($(dot-config),1)
  397. # Read in config
  398. -include include/config/auto.conf
  399. ifeq ($(KBUILD_EXTMOD),)
  400. # Read in dependencies to all Kconfig* files, make sure to run
  401. # oldconfig if changes are detected.
  402. -include include/config/auto.conf.cmd
  403. # To avoid any implicit rule to kick in, define an empty command
  404. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  405. # If .config is newer than include/config/auto.conf, someone tinkered
  406. # with it and forgot to run make oldconfig.
  407. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  408. # we execute the config step to be sure to catch updated Kconfig files
  409. include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  410. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  411. else
  412. # external modules needs include/linux/autoconf.h and include/config/auto.conf
  413. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  414. PHONY += include/config/auto.conf
  415. include/config/auto.conf:
  416. $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
  417. echo; \
  418. echo " ERROR: Kernel configuration is invalid."; \
  419. echo " include/linux/autoconf.h or $@ are missing."; \
  420. echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  421. echo; \
  422. /bin/false)
  423. endif # KBUILD_EXTMOD
  424. else
  425. # Dummy target needed, because used as prerequisite
  426. include/config/auto.conf: ;
  427. endif # $(dot-config)
  428. # The all: target is the default when no target is given on the
  429. # command line.
  430. # This allow a user to issue only 'make' to build a kernel including modules
  431. # Defaults vmlinux but it is usually overridden in the arch makefile
  432. all: vmlinux
  433. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  434. KBUILD_CFLAGS += -Os
  435. else
  436. KBUILD_CFLAGS += -O2
  437. endif
  438. include $(srctree)/arch/$(SRCARCH)/Makefile
  439. ifneq (CONFIG_FRAME_WARN,0)
  440. KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  441. endif
  442. # Force gcc to behave correct even for buggy distributions
  443. ifndef CONFIG_CC_STACKPROTECTOR
  444. KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
  445. endif
  446. ifdef CONFIG_FRAME_POINTER
  447. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  448. else
  449. KBUILD_CFLAGS += -fomit-frame-pointer
  450. endif
  451. ifdef CONFIG_DEBUG_INFO
  452. KBUILD_CFLAGS += -g
  453. KBUILD_AFLAGS += -gdwarf-2
  454. endif
  455. ifdef CONFIG_FUNCTION_TRACER
  456. KBUILD_CFLAGS += -pg
  457. endif
  458. # We trigger additional mismatches with less inlining
  459. ifdef CONFIG_DEBUG_SECTION_MISMATCH
  460. KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  461. endif
  462. # arch Makefile may override CC so keep this after arch Makefile is included
  463. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  464. CHECKFLAGS += $(NOSTDINC_FLAGS)
  465. # warn about C99 declaration after statement
  466. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  467. # disable pointer signed / unsigned warnings in gcc 4.0
  468. KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  469. # disable invalid "can't wrap" optimizations for signed / pointers
  470. KBUILD_CFLAGS += $(call cc-option,-fwrapv)
  471. # revert to pre-gcc-4.4 behaviour of .eh_frame
  472. KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
  473. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  474. # But warn user when we do so
  475. warn-assign = \
  476. $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
  477. ifneq ($(KCPPFLAGS),)
  478. $(call warn-assign,CPPFLAGS)
  479. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  480. endif
  481. ifneq ($(KAFLAGS),)
  482. $(call warn-assign,AFLAGS)
  483. KBUILD_AFLAGS += $(KAFLAGS)
  484. endif
  485. ifneq ($(KCFLAGS),)
  486. $(call warn-assign,CFLAGS)
  487. KBUILD_CFLAGS += $(KCFLAGS)
  488. endif
  489. # Use --build-id when available.
  490. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  491. $(call ld-option, -Wl$(comma)--build-id,))
  492. LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  493. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  494. ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
  495. LDFLAGS_vmlinux += -X
  496. endif
  497. # Default kernel image to build when no specific target is given.
  498. # KBUILD_IMAGE may be overruled on the command line or
  499. # set in the environment
  500. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  501. # this default value
  502. export KBUILD_IMAGE ?= vmlinux
  503. #
  504. # INSTALL_PATH specifies where to place the updated kernel and system map
  505. # images. Default is /boot, but you can set it to other values
  506. export INSTALL_PATH ?= /boot
  507. #
  508. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  509. # relocations required by build roots. This is not defined in the
  510. # makefile but the argument can be passed to make if needed.
  511. #
  512. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  513. export MODLIB
  514. #
  515. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  516. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  517. # the default option --strip-debug will be used. Otherwise,
  518. # INSTALL_MOD_STRIP will used as the options to the strip command.
  519. ifdef INSTALL_MOD_STRIP
  520. ifeq ($(INSTALL_MOD_STRIP),1)
  521. mod_strip_cmd = $(STRIP) --strip-debug
  522. else
  523. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  524. endif # INSTALL_MOD_STRIP=1
  525. else
  526. mod_strip_cmd = true
  527. endif # INSTALL_MOD_STRIP
  528. export mod_strip_cmd
  529. ifeq ($(KBUILD_EXTMOD),)
  530. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  531. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  532. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  533. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  534. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  535. $(init-n) $(init-) \
  536. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  537. $(net-n) $(net-) $(libs-n) $(libs-))))
  538. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  539. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  540. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  541. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  542. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  543. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  544. libs-y := $(libs-y1) $(libs-y2)
  545. # Build vmlinux
  546. # ---------------------------------------------------------------------------
  547. # vmlinux is built from the objects selected by $(vmlinux-init) and
  548. # $(vmlinux-main). Most are built-in.o files from top-level directories
  549. # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  550. # Ordering when linking is important, and $(vmlinux-init) must be first.
  551. #
  552. # vmlinux
  553. # ^
  554. # |
  555. # +-< $(vmlinux-init)
  556. # | +--< init/version.o + more
  557. # |
  558. # +--< $(vmlinux-main)
  559. # | +--< driver/built-in.o mm/built-in.o + more
  560. # |
  561. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  562. #
  563. # vmlinux version (uname -v) cannot be updated during normal
  564. # descending-into-subdirs phase since we do not yet know if we need to
  565. # update vmlinux.
  566. # Therefore this step is delayed until just before final link of vmlinux -
  567. # except in the kallsyms case where it is done just before adding the
  568. # symbols to the kernel.
  569. #
  570. # System.map is generated to document addresses of all kernel symbols
  571. vmlinux-init := $(head-y) $(init-y)
  572. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  573. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  574. vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
  575. export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
  576. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  577. # May be overridden by arch/$(ARCH)/Makefile
  578. quiet_cmd_vmlinux__ ?= LD $@
  579. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  580. -T $(vmlinux-lds) $(vmlinux-init) \
  581. --start-group $(vmlinux-main) --end-group \
  582. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
  583. # Generate new vmlinux version
  584. quiet_cmd_vmlinux_version = GEN .version
  585. cmd_vmlinux_version = set -e; \
  586. if [ ! -r .version ]; then \
  587. rm -f .version; \
  588. echo 1 >.version; \
  589. else \
  590. mv .version .old_version; \
  591. expr 0$$(cat .old_version) + 1 >.version; \
  592. fi; \
  593. $(MAKE) $(build)=init
  594. # Generate System.map
  595. quiet_cmd_sysmap = SYSMAP
  596. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  597. # Link of vmlinux
  598. # If CONFIG_KALLSYMS is set .version is already updated
  599. # Generate System.map and verify that the content is consistent
  600. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  601. # First command is ':' to allow us to use + in front of the rule
  602. define rule_vmlinux__
  603. :
  604. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  605. $(call cmd,vmlinux__)
  606. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  607. $(Q)$(if $($(quiet)cmd_sysmap), \
  608. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  609. $(cmd_sysmap) $@ System.map; \
  610. if [ $$? -ne 0 ]; then \
  611. rm -f $@; \
  612. /bin/false; \
  613. fi;
  614. $(verify_kallsyms)
  615. endef
  616. ifdef CONFIG_KALLSYMS
  617. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  618. # It's a three stage process:
  619. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  620. # empty
  621. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  622. # the right size - vmlinux version (uname -v) is updated during this step
  623. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  624. # but due to the added section, some addresses have shifted.
  625. # From here, we generate a correct .tmp_kallsyms2.o
  626. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  627. # o Verify that the System.map from vmlinux matches the map from
  628. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  629. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  630. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  631. # temporary bypass to allow the kernel to be built while the
  632. # maintainers work out what went wrong with kallsyms.
  633. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  634. last_kallsyms := 3
  635. else
  636. last_kallsyms := 2
  637. endif
  638. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  639. define verify_kallsyms
  640. $(Q)$(if $($(quiet)cmd_sysmap), \
  641. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  642. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  643. $(Q)cmp -s System.map .tmp_System.map || \
  644. (echo Inconsistent kallsyms data; \
  645. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  646. rm .tmp_kallsyms* ; /bin/false )
  647. endef
  648. # Update vmlinux version before link
  649. # Use + in front of this rule to silent warning about make -j1
  650. # First command is ':' to allow us to use + in front of this rule
  651. cmd_ksym_ld = $(cmd_vmlinux__)
  652. define rule_ksym_ld
  653. :
  654. +$(call cmd,vmlinux_version)
  655. $(call cmd,vmlinux__)
  656. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  657. endef
  658. # Generate .S file with all kernel symbols
  659. quiet_cmd_kallsyms = KSYM $@
  660. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  661. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  662. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  663. $(call if_changed_dep,as_o_S)
  664. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  665. $(call cmd,kallsyms)
  666. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  667. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  668. $(call if_changed_rule,ksym_ld)
  669. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  670. $(call if_changed,vmlinux__)
  671. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  672. $(call if_changed,vmlinux__)
  673. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  674. $(KALLSYMS): scripts ;
  675. # Generate some data for debugging strange kallsyms problems
  676. debug_kallsyms: .tmp_map$(last_kallsyms)
  677. .tmp_map%: .tmp_vmlinux% FORCE
  678. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  679. .tmp_map3: .tmp_map2
  680. .tmp_map2: .tmp_map1
  681. endif # ifdef CONFIG_KALLSYMS
  682. # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
  683. # relevant sections renamed as per the linker script.
  684. quiet_cmd_vmlinux-modpost = LD $@
  685. cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
  686. $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
  687. $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
  688. define rule_vmlinux-modpost
  689. :
  690. +$(call cmd,vmlinux-modpost)
  691. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  692. $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
  693. endef
  694. # vmlinux image - including updated kernel symbols
  695. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
  696. ifdef CONFIG_HEADERS_CHECK
  697. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  698. endif
  699. ifdef CONFIG_SAMPLES
  700. $(Q)$(MAKE) $(build)=samples
  701. endif
  702. ifdef CONFIG_BUILD_DOCSRC
  703. $(Q)$(MAKE) $(build)=Documentation
  704. endif
  705. $(call vmlinux-modpost)
  706. $(call if_changed_rule,vmlinux__)
  707. $(Q)rm -f .old_version
  708. # build vmlinux.o first to catch section mismatch errors early
  709. ifdef CONFIG_KALLSYMS
  710. .tmp_vmlinux1: vmlinux.o
  711. endif
  712. modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
  713. vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
  714. $(call if_changed_rule,vmlinux-modpost)
  715. # The actual objects are generated when descending,
  716. # make sure no implicit rule kicks in
  717. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  718. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  719. # Preset locale variables to speed up the build process. Limit locale
  720. # tweaks to this spot to avoid wrong language settings when running
  721. # make menuconfig etc.
  722. # Error messages still appears in the original language
  723. PHONY += $(vmlinux-dirs)
  724. $(vmlinux-dirs): prepare scripts
  725. $(Q)$(MAKE) $(build)=$@
  726. # Build the kernel release string
  727. #
  728. # The KERNELRELEASE value built here is stored in the file
  729. # include/config/kernel.release, and is used when executing several
  730. # make targets, such as "make install" or "make modules_install."
  731. #
  732. # The eventual kernel release string consists of the following fields,
  733. # shown in a hierarchical format to show how smaller parts are concatenated
  734. # to form the larger and final value, with values coming from places like
  735. # the Makefile, kernel config options, make command line options and/or
  736. # SCM tag information.
  737. #
  738. # $(KERNELVERSION)
  739. # $(VERSION) eg, 2
  740. # $(PATCHLEVEL) eg, 6
  741. # $(SUBLEVEL) eg, 18
  742. # $(EXTRAVERSION) eg, -rc6
  743. # $(localver-full)
  744. # $(localver)
  745. # localversion* (files without backups, containing '~')
  746. # $(CONFIG_LOCALVERSION) (from kernel config setting)
  747. # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
  748. # ./scripts/setlocalversion (SCM tag, if one exists)
  749. # $(LOCALVERSION) (from make command line if provided)
  750. #
  751. # Note how the final $(localver-auto) string is included *only* if the
  752. # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
  753. # moment, only git is supported but other SCMs can edit the script
  754. # scripts/setlocalversion and add the appropriate checks as needed.
  755. pattern = ".*/localversion[^~]*"
  756. string = $(shell cat /dev/null \
  757. `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
  758. localver = $(subst $(space),, $(string) \
  759. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  760. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  761. # and if the SCM is know a tag from the SCM is appended.
  762. # The appended tag is determined by the SCM used.
  763. #
  764. # .scmversion is used when generating rpm packages so we do not loose
  765. # the version information from the SCM when we do the build of the kernel
  766. # from the copied source
  767. ifdef CONFIG_LOCALVERSION_AUTO
  768. ifeq ($(wildcard .scmversion),)
  769. _localver-auto = $(shell $(CONFIG_SHELL) \
  770. $(srctree)/scripts/setlocalversion $(srctree))
  771. else
  772. _localver-auto = $(shell cat .scmversion 2> /dev/null)
  773. endif
  774. localver-auto = $(LOCALVERSION)$(_localver-auto)
  775. endif
  776. localver-full = $(localver)$(localver-auto)
  777. # Store (new) KERNELRELASE string in include/config/kernel.release
  778. kernelrelease = $(KERNELVERSION)$(localver-full)
  779. include/config/kernel.release: include/config/auto.conf FORCE
  780. $(Q)rm -f $@
  781. $(Q)echo $(kernelrelease) > $@
  782. # Things we need to do before we recursively start building the kernel
  783. # or the modules are listed in "prepare".
  784. # A multi level approach is used. prepareN is processed before prepareN-1.
  785. # archprepare is used in arch Makefiles and when processed asm symlink,
  786. # version.h and scripts_basic is processed / created.
  787. # Listed in dependency order
  788. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  789. # prepare3 is used to check if we are building in a separate output directory,
  790. # and if so do:
  791. # 1) Check that make has not been executed in the kernel src $(srctree)
  792. # 2) Create the include2 directory, used for the second asm symlink
  793. prepare3: include/config/kernel.release
  794. ifneq ($(KBUILD_SRC),)
  795. @$(kecho) ' Using $(srctree) as source for kernel'
  796. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  797. echo " $(srctree) is not clean, please run 'make mrproper'";\
  798. echo " in the '$(srctree)' directory.";\
  799. /bin/false; \
  800. fi;
  801. $(Q)if [ ! -d include2 ]; then \
  802. mkdir -p include2; \
  803. ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
  804. fi
  805. endif
  806. # prepare2 creates a makefile if using a separate output directory
  807. prepare2: prepare3 outputmakefile
  808. prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
  809. include/asm include/config/auto.conf
  810. $(cmd_crmodverdir)
  811. archprepare: prepare1 scripts_basic
  812. prepare0: archprepare FORCE
  813. $(Q)$(MAKE) $(build)=.
  814. $(Q)$(MAKE) $(build)=. missing-syscalls
  815. # All the preparing..
  816. prepare: prepare0
  817. # Leave this as default for preprocessing vmlinux.lds.S, which is now
  818. # done in arch/$(ARCH)/kernel/Makefile
  819. export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
  820. # The asm symlink changes when $(ARCH) changes.
  821. # Detect this and ask user to run make mrproper
  822. # If asm is a stale symlink (point to dir that does not exist) remove it
  823. define check-symlink
  824. set -e; \
  825. if [ -L include/asm ]; then \
  826. asmlink=`readlink include/asm | cut -d '-' -f 2`; \
  827. if [ "$$asmlink" != "$(SRCARCH)" ]; then \
  828. echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
  829. echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
  830. exit 1; \
  831. fi; \
  832. test -e $$asmlink || rm include/asm; \
  833. elif [ -d include/asm ]; then \
  834. echo "ERROR: $@ is a directory but a symlink was expected";\
  835. exit 1; \
  836. fi
  837. endef
  838. # We create the target directory of the symlink if it does
  839. # not exist so the test in check-symlink works and we have a
  840. # directory for generated filesas used by some architectures.
  841. define create-symlink
  842. if [ ! -L include/asm ]; then \
  843. $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
  844. if [ ! -d include/asm-$(SRCARCH) ]; then \
  845. mkdir -p include/asm-$(SRCARCH); \
  846. fi; \
  847. ln -fsn asm-$(SRCARCH) $@; \
  848. fi
  849. endef
  850. include/asm: FORCE
  851. $(Q)$(check-symlink)
  852. $(Q)$(create-symlink)
  853. # Generate some files
  854. # ---------------------------------------------------------------------------
  855. # KERNELRELEASE can change from a few different places, meaning version.h
  856. # needs to be updated, so this check is forced on all builds
  857. uts_len := 64
  858. define filechk_utsrelease.h
  859. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  860. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  861. exit 1; \
  862. fi; \
  863. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  864. endef
  865. define filechk_version.h
  866. (echo \#define LINUX_VERSION_CODE $(shell \
  867. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  868. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  869. endef
  870. include/linux/version.h: $(srctree)/Makefile FORCE
  871. $(call filechk,version.h)
  872. include/linux/utsrelease.h: include/config/kernel.release FORCE
  873. $(call filechk,utsrelease.h)
  874. PHONY += headerdep
  875. headerdep:
  876. $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
  877. # ---------------------------------------------------------------------------
  878. PHONY += depend dep
  879. depend dep:
  880. @echo '*** Warning: make $@ is unnecessary now.'
  881. # ---------------------------------------------------------------------------
  882. # Firmware install
  883. INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
  884. export INSTALL_FW_PATH
  885. PHONY += firmware_install
  886. firmware_install: FORCE
  887. @mkdir -p $(objtree)/firmware
  888. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
  889. # ---------------------------------------------------------------------------
  890. # Kernel headers
  891. #Default location for installed headers
  892. export INSTALL_HDR_PATH = $(objtree)/usr
  893. hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
  894. # Find out where the Kbuild file is located to support
  895. # arch/$(ARCH)/include/asm
  896. hdr-dir = $(strip \
  897. $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
  898. arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
  899. # If we do an all arch process set dst to asm-$(hdr-arch)
  900. hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
  901. PHONY += __headers
  902. __headers: include/linux/version.h scripts_basic FORCE
  903. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  904. PHONY += headers_install_all
  905. headers_install_all:
  906. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
  907. PHONY += headers_install
  908. headers_install: __headers
  909. $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
  910. $(error Headers not exportable for the $(SRCARCH) architecture))
  911. $(Q)$(MAKE) $(hdr-inst)=include
  912. $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
  913. PHONY += headers_check_all
  914. headers_check_all: headers_install_all
  915. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
  916. PHONY += headers_check
  917. headers_check: headers_install
  918. $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
  919. $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
  920. # ---------------------------------------------------------------------------
  921. # Modules
  922. ifdef CONFIG_MODULES
  923. # By default, build modules as well
  924. all: modules
  925. # Build modules
  926. #
  927. # A module can be listed more than once in obj-m resulting in
  928. # duplicate lines in modules.order files. Those are removed
  929. # using awk while concatenating to the final file.
  930. PHONY += modules
  931. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  932. $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
  933. @$(kecho) ' Building modules, stage 2.';
  934. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  935. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
  936. # Target to prepare building external modules
  937. PHONY += modules_prepare
  938. modules_prepare: prepare scripts
  939. # Target to install modules
  940. PHONY += modules_install
  941. modules_install: _modinst_ _modinst_post
  942. PHONY += _modinst_
  943. _modinst_:
  944. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  945. echo "Warning: you may need to install module-init-tools"; \
  946. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  947. sleep 1; \
  948. fi
  949. @rm -rf $(MODLIB)/kernel
  950. @rm -f $(MODLIB)/source
  951. @mkdir -p $(MODLIB)/kernel
  952. @ln -s $(srctree) $(MODLIB)/source
  953. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  954. rm -f $(MODLIB)/build ; \
  955. ln -s $(objtree) $(MODLIB)/build ; \
  956. fi
  957. @cp -f $(objtree)/modules.order $(MODLIB)/
  958. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  959. # This depmod is only for convenience to give the initial
  960. # boot a modules.dep even before / is mounted read-write. However the
  961. # boot script depmod is the master version.
  962. PHONY += _modinst_post
  963. _modinst_post: _modinst_
  964. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
  965. $(call cmd,depmod)
  966. else # CONFIG_MODULES
  967. # Modules not configured
  968. # ---------------------------------------------------------------------------
  969. modules modules_install: FORCE
  970. @echo
  971. @echo "The present kernel configuration has modules disabled."
  972. @echo "Type 'make config' and enable loadable module support."
  973. @echo "Then build a kernel with module support enabled."
  974. @echo
  975. @exit 1
  976. endif # CONFIG_MODULES
  977. ###
  978. # Cleaning is done on three levels.
  979. # make clean Delete most generated files
  980. # Leave enough to build external modules
  981. # make mrproper Delete the current configuration, and all generated files
  982. # make distclean Remove editor backup files, patch leftover files and the like
  983. # Directories & files removed with 'make clean'
  984. CLEAN_DIRS += $(MODVERDIR)
  985. CLEAN_FILES += vmlinux System.map \
  986. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  987. # Directories & files removed with 'make mrproper'
  988. MRPROPER_DIRS += include/config include2 usr/include include/generated
  989. MRPROPER_FILES += .config .config.old include/asm .version .old_version \
  990. include/linux/autoconf.h include/linux/version.h \
  991. include/linux/utsrelease.h \
  992. include/linux/bounds.h include/asm*/asm-offsets.h \
  993. Module.symvers Module.markers tags TAGS cscope*
  994. # clean - Delete most, but leave enough to build external modules
  995. #
  996. clean: rm-dirs := $(CLEAN_DIRS)
  997. clean: rm-files := $(CLEAN_FILES)
  998. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
  999. PHONY += $(clean-dirs) clean archclean
  1000. $(clean-dirs):
  1001. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1002. clean: archclean $(clean-dirs)
  1003. $(call cmd,rmdirs)
  1004. $(call cmd,rmfiles)
  1005. @find . $(RCS_FIND_IGNORE) \
  1006. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1007. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  1008. -o -name '*.symtypes' -o -name 'modules.order' \
  1009. -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
  1010. -type f -print | xargs rm -f
  1011. # mrproper - Delete all generated files, including .config
  1012. #
  1013. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  1014. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  1015. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  1016. PHONY += $(mrproper-dirs) mrproper archmrproper
  1017. $(mrproper-dirs):
  1018. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  1019. mrproper: clean archmrproper $(mrproper-dirs)
  1020. $(call cmd,rmdirs)
  1021. $(call cmd,rmfiles)
  1022. # distclean
  1023. #
  1024. PHONY += distclean
  1025. distclean: mrproper
  1026. @find $(srctree) $(RCS_FIND_IGNORE) \
  1027. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  1028. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  1029. -o -name '.*.rej' -o -size 0 \
  1030. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  1031. -type f -print | xargs rm -f
  1032. # Packaging of the kernel to various formats
  1033. # ---------------------------------------------------------------------------
  1034. # rpm target kept for backward compatibility
  1035. package-dir := $(srctree)/scripts/package
  1036. %pkg: include/config/kernel.release FORCE
  1037. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1038. rpm: include/config/kernel.release FORCE
  1039. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1040. # Brief documentation of the typical targets used
  1041. # ---------------------------------------------------------------------------
  1042. boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
  1043. boards := $(notdir $(boards))
  1044. board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  1045. board-dirs := $(sort $(notdir $(board-dirs:/=)))
  1046. help:
  1047. @echo 'Cleaning targets:'
  1048. @echo ' clean - Remove most generated files but keep the config and'
  1049. @echo ' enough build support to build external modules'
  1050. @echo ' mrproper - Remove all generated files + config + various backup files'
  1051. @echo ' distclean - mrproper + remove editor backup and patch files'
  1052. @echo ''
  1053. @echo 'Configuration targets:'
  1054. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  1055. @echo ''
  1056. @echo 'Other generic targets:'
  1057. @echo ' all - Build all targets marked with [*]'
  1058. @echo '* vmlinux - Build the bare kernel'
  1059. @echo '* modules - Build all modules'
  1060. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  1061. @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
  1062. @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
  1063. @echo ' dir/ - Build all files in dir and below'
  1064. @echo ' dir/file.[ois] - Build specified target only'
  1065. @echo ' dir/file.ko - Build module including final link'
  1066. @echo ' modules_prepare - Set up for building external modules'
  1067. @echo ' tags/TAGS - Generate tags file for editors'
  1068. @echo ' cscope - Generate cscope index'
  1069. @echo ' kernelrelease - Output the release version string'
  1070. @echo ' kernelversion - Output the version stored in Makefile'
  1071. @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  1072. echo ' (default: $(INSTALL_HDR_PATH))'; \
  1073. echo ''
  1074. @echo 'Static analysers'
  1075. @echo ' checkstack - Generate a list of stack hogs'
  1076. @echo ' namespacecheck - Name space analysis on compiled kernel'
  1077. @echo ' versioncheck - Sanity check on version.h usage'
  1078. @echo ' includecheck - Check for duplicate included header files'
  1079. @echo ' export_report - List the usages of all exported symbols'
  1080. @echo ' headers_check - Sanity check on exported headers'
  1081. @echo ' headerdep - Detect inclusion cycles in headers'; \
  1082. echo ''
  1083. @echo 'Kernel packaging:'
  1084. @$(MAKE) $(build)=$(package-dir) help
  1085. @echo ''
  1086. @echo 'Documentation targets:'
  1087. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  1088. @echo ''
  1089. @echo 'Architecture specific targets ($(SRCARCH)):'
  1090. @$(if $(archhelp),$(archhelp),\
  1091. echo ' No architecture specific help defined for $(SRCARCH)')
  1092. @echo ''
  1093. @$(if $(boards), \
  1094. $(foreach b, $(boards), \
  1095. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  1096. echo '')
  1097. @$(if $(board-dirs), \
  1098. $(foreach b, $(board-dirs), \
  1099. printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
  1100. printf " %-16s - Show all of the above\\n" help-boards; \
  1101. echo '')
  1102. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1103. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  1104. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  1105. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  1106. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  1107. @echo ''
  1108. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  1109. @echo 'For further info see the ./README file'
  1110. help-board-dirs := $(addprefix help-,$(board-dirs))
  1111. help-boards: $(help-board-dirs)
  1112. boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
  1113. $(help-board-dirs): help-%:
  1114. @echo 'Architecture specific targets ($(SRCARCH) $*):'
  1115. @$(if $(boards-per-dir), \
  1116. $(foreach b, $(boards-per-dir), \
  1117. printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
  1118. echo '')
  1119. # Documentation targets
  1120. # ---------------------------------------------------------------------------
  1121. %docs: scripts_basic FORCE
  1122. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  1123. else # KBUILD_EXTMOD
  1124. ###
  1125. # External module support.
  1126. # When building external modules the kernel used as basis is considered
  1127. # read-only, and no consistency checks are made and the make
  1128. # system is not used on the basis kernel. If updates are required
  1129. # in the basis kernel ordinary make commands (without M=...) must
  1130. # be used.
  1131. #
  1132. # The following are the only valid targets when building external
  1133. # modules.
  1134. # make M=dir clean Delete all automatically generated files
  1135. # make M=dir modules Make all modules in specified dir
  1136. # make M=dir Same as 'make M=dir modules'
  1137. # make M=dir modules_install
  1138. # Install the modules built in the module directory
  1139. # Assumes install directory is already created
  1140. # We are always building modules
  1141. KBUILD_MODULES := 1
  1142. PHONY += crmodverdir
  1143. crmodverdir:
  1144. $(cmd_crmodverdir)
  1145. PHONY += $(objtree)/Module.symvers
  1146. $(objtree)/Module.symvers:
  1147. @test -e $(objtree)/Module.symvers || ( \
  1148. echo; \
  1149. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1150. echo " is missing; modules will have no dependencies and modversions."; \
  1151. echo )
  1152. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1153. PHONY += $(module-dirs) modules
  1154. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1155. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1156. modules: $(module-dirs)
  1157. @$(kecho) ' Building modules, stage 2.';
  1158. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1159. PHONY += modules_install
  1160. modules_install: _emodinst_ _emodinst_post
  1161. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1162. PHONY += _emodinst_
  1163. _emodinst_:
  1164. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1165. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1166. PHONY += _emodinst_post
  1167. _emodinst_post: _emodinst_
  1168. $(call cmd,depmod)
  1169. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1170. PHONY += $(clean-dirs) clean
  1171. $(clean-dirs):
  1172. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1173. clean: rm-dirs := $(MODVERDIR)
  1174. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
  1175. $(KBUILD_EXTMOD)/Module.markers \
  1176. $(KBUILD_EXTMOD)/modules.order
  1177. clean: $(clean-dirs)
  1178. $(call cmd,rmdirs)
  1179. $(call cmd,rmfiles)
  1180. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  1181. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1182. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  1183. -type f -print | xargs rm -f
  1184. help:
  1185. @echo ' Building external modules.'
  1186. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1187. @echo ''
  1188. @echo ' modules - default target, build the module(s)'
  1189. @echo ' modules_install - install the module'
  1190. @echo ' clean - remove generated files in module directory only'
  1191. @echo ''
  1192. # Dummies...
  1193. PHONY += prepare scripts
  1194. prepare: ;
  1195. scripts: ;
  1196. endif # KBUILD_EXTMOD
  1197. # Generate tags for editors
  1198. # ---------------------------------------------------------------------------
  1199. quiet_cmd_tags = GEN $@
  1200. cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
  1201. tags TAGS cscope: FORCE
  1202. $(call cmd,tags)
  1203. # Scripts to check various things for consistency
  1204. # ---------------------------------------------------------------------------
  1205. includecheck:
  1206. find * $(RCS_FIND_IGNORE) \
  1207. -name '*.[hcS]' -type f -print | sort \
  1208. | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
  1209. versioncheck:
  1210. find * $(RCS_FIND_IGNORE) \
  1211. -name '*.[hcS]' -type f -print | sort \
  1212. | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
  1213. namespacecheck:
  1214. $(PERL) $(srctree)/scripts/namespace.pl
  1215. export_report:
  1216. $(PERL) $(srctree)/scripts/export_report.pl
  1217. endif #ifeq ($(config-targets),1)
  1218. endif #ifeq ($(mixed-targets),1)
  1219. PHONY += checkstack kernelrelease kernelversion
  1220. # UML needs a little special treatment here. It wants to use the host
  1221. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1222. # else wants $(ARCH), including people doing cross-builds, which means
  1223. # that $(SUBARCH) doesn't work here.
  1224. ifeq ($(ARCH), um)
  1225. CHECKSTACK_ARCH := $(SUBARCH)
  1226. else
  1227. CHECKSTACK_ARCH := $(ARCH)
  1228. endif
  1229. checkstack:
  1230. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1231. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1232. kernelrelease:
  1233. $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  1234. $(error kernelrelease not valid - run 'make prepare' to update it))
  1235. kernelversion:
  1236. @echo $(KERNELVERSION)
  1237. # Single targets
  1238. # ---------------------------------------------------------------------------
  1239. # Single targets are compatible with:
  1240. # - build with mixed source and output
  1241. # - build with separate output dir 'make O=...'
  1242. # - external modules
  1243. #
  1244. # target-dir => where to store outputfile
  1245. # build-dir => directory in kernel source tree to use
  1246. ifeq ($(KBUILD_EXTMOD),)
  1247. build-dir = $(patsubst %/,%,$(dir $@))
  1248. target-dir = $(dir $@)
  1249. else
  1250. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1251. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1252. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1253. endif
  1254. %.s: %.c prepare scripts FORCE
  1255. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1256. %.i: %.c prepare scripts FORCE
  1257. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1258. %.o: %.c prepare scripts FORCE
  1259. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1260. %.lst: %.c prepare scripts FORCE
  1261. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1262. %.s: %.S prepare scripts FORCE
  1263. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1264. %.o: %.S prepare scripts FORCE
  1265. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1266. %.symtypes: %.c prepare scripts FORCE
  1267. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1268. # Modules
  1269. /: prepare scripts FORCE
  1270. $(cmd_crmodverdir)
  1271. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1272. $(build)=$(build-dir)
  1273. %/: prepare scripts FORCE
  1274. $(cmd_crmodverdir)
  1275. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1276. $(build)=$(build-dir)
  1277. %.ko: prepare scripts FORCE
  1278. $(cmd_crmodverdir)
  1279. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1280. $(build)=$(build-dir) $(@:.ko=.o)
  1281. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1282. # FIXME Should go into a make.lib or something
  1283. # ===========================================================================
  1284. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1285. cmd_rmdirs = rm -rf $(rm-dirs)
  1286. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1287. cmd_rmfiles = rm -f $(rm-files)
  1288. # Run depmod only if we have System.map and depmod is executable
  1289. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1290. cmd_depmod = \
  1291. if [ -r System.map -a -x $(DEPMOD) ]; then \
  1292. $(DEPMOD) -ae -F System.map \
  1293. $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
  1294. $(KERNELRELEASE); \
  1295. fi
  1296. # Create temporary dir for module support files
  1297. # clean it up only when building all modules
  1298. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1299. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1300. a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
  1301. $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
  1302. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1303. quiet_cmd_as_o_S = AS $@
  1304. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1305. # read all saved command lines
  1306. targets := $(wildcard $(sort $(targets)))
  1307. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1308. ifneq ($(cmd_files),)
  1309. $(cmd_files): ; # Do not try to update included dependency files
  1310. include $(cmd_files)
  1311. endif
  1312. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1313. # Usage:
  1314. # $(Q)$(MAKE) $(clean)=dir
  1315. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1316. endif # skip-makefile
  1317. PHONY += FORCE
  1318. FORCE:
  1319. # Declare the contents of the .PHONY variable as phony. We keep that
  1320. # information in a variable so we can use it in if_changed and friends.
  1321. .PHONY: $(PHONY)