Makefile 54 KB

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  1. FRED=42
  2. VERSION = 2
  3. PATCHLEVEL = 6
  4. SUBLEVEL = 26
  5. EXTRAVERSION =
  6. NAME = Rotary Wombat
  7. # *DOCUMENTATION*
  8. # To see a list of typical targets execute "make help"
  9. # More info can be located in ./README
  10. # Comments in this file are targeted only to the developer, do not
  11. # expect to learn how to build the kernel reading this file.
  12. # Do not:
  13. # o use make's built-in rules and variables
  14. # (this increases performance and avoids hard-to-debug behaviour);
  15. # o print "Entering directory ...";
  16. MAKEFLAGS += -rR --no-print-directory
  17. # We are using a recursive build, so we need to do a little thinking
  18. # to get the ordering right.
  19. #
  20. # Most importantly: sub-Makefiles should only ever modify files in
  21. # their own directory. If in some directory we have a dependency on
  22. # a file in another dir (which doesn't happen often, but it's often
  23. # unavoidable when linking the built-in.o targets which finally
  24. # turn into vmlinux), we will call a sub make in that other dir, and
  25. # after that we are sure that everything which is in that other dir
  26. # is now up to date.
  27. #
  28. # The only cases where we need to modify files which have global
  29. # effects are thus separated out and done before the recursive
  30. # descending is started. They are now explicitly listed as the
  31. # prepare rule.
  32. # To put more focus on warnings, be less verbose as default
  33. # Use 'make V=1' to see the full commands
  34. ifdef V
  35. ifeq ("$(origin V)", "command line")
  36. KBUILD_VERBOSE = $(V)
  37. endif
  38. endif
  39. ifndef KBUILD_VERBOSE
  40. KBUILD_VERBOSE = 0
  41. endif
  42. # Call a source code checker (by default, "sparse") as part of the
  43. # C compilation.
  44. #
  45. # Use 'make C=1' to enable checking of only re-compiled files.
  46. # Use 'make C=2' to enable checking of *all* source files, regardless
  47. # of whether they are re-compiled or not.
  48. #
  49. # See the file "Documentation/sparse.txt" for more details, including
  50. # where to get the "sparse" utility.
  51. ifdef C
  52. ifeq ("$(origin C)", "command line")
  53. KBUILD_CHECKSRC = $(C)
  54. endif
  55. endif
  56. ifndef KBUILD_CHECKSRC
  57. KBUILD_CHECKSRC = 0
  58. endif
  59. # Use make M=dir to specify directory of external module to build
  60. # Old syntax make ... SUBDIRS=$PWD is still supported
  61. # Setting the environment variable KBUILD_EXTMOD take precedence
  62. ifdef SUBDIRS
  63. KBUILD_EXTMOD ?= $(SUBDIRS)
  64. endif
  65. ifdef M
  66. ifeq ("$(origin M)", "command line")
  67. KBUILD_EXTMOD := $(M)
  68. endif
  69. endif
  70. # kbuild supports saving output files in a separate directory.
  71. # To locate output files in a separate directory two syntaxes are supported.
  72. # In both cases the working directory must be the root of the kernel src.
  73. # 1) O=
  74. # Use "make O=dir/to/store/output/files/"
  75. #
  76. # 2) Set KBUILD_OUTPUT
  77. # Set the environment variable KBUILD_OUTPUT to point to the directory
  78. # where the output files shall be placed.
  79. # export KBUILD_OUTPUT=dir/to/store/output/files/
  80. # make
  81. #
  82. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  83. # variable.
  84. # KBUILD_SRC is set on invocation of make in OBJ directory
  85. # KBUILD_SRC is not intended to be used by the regular user (for now)
  86. ifeq ($(KBUILD_SRC),)
  87. # OK, Make called in directory where kernel src resides
  88. # Do we want to locate output files in a separate directory?
  89. ifdef O
  90. ifeq ("$(origin O)", "command line")
  91. KBUILD_OUTPUT := $(O)
  92. endif
  93. endif
  94. # That's our default target when none is given on the command line
  95. PHONY := _all
  96. _all:
  97. # Cancel implicit rules on top Makefile
  98. $(CURDIR)/Makefile Makefile: ;
  99. ifneq ($(KBUILD_OUTPUT),)
  100. # Invoke a second make in the output directory, passing relevant variables
  101. # check that the output directory actually exists
  102. saved-output := $(KBUILD_OUTPUT)
  103. KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  104. $(if $(KBUILD_OUTPUT),, \
  105. $(error output directory "$(saved-output)" does not exist))
  106. PHONY += $(MAKECMDGOALS) sub-make
  107. $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
  108. $(Q)@:
  109. sub-make: FORCE
  110. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  111. KBUILD_SRC=$(CURDIR) \
  112. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
  113. $(filter-out _all sub-make,$(MAKECMDGOALS))
  114. # Leave processing to above invocation of make
  115. skip-makefile := 1
  116. endif # ifneq ($(KBUILD_OUTPUT),)
  117. endif # ifeq ($(KBUILD_SRC),)
  118. # We process the rest of the Makefile if this is the final invocation of make
  119. ifeq ($(skip-makefile),)
  120. # If building an external module we do not care about the all: rule
  121. # but instead _all depend on modules
  122. PHONY += all
  123. ifeq ($(KBUILD_EXTMOD),)
  124. _all: all
  125. else
  126. _all: modules
  127. endif
  128. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  129. TOPDIR := $(srctree)
  130. # FIXME - TOPDIR is obsolete, use srctree/objtree
  131. objtree := $(CURDIR)
  132. src := $(srctree)
  133. obj := $(objtree)
  134. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  135. export srctree objtree VPATH TOPDIR
  136. # SUBARCH tells the usermode build what the underlying arch is. That is set
  137. # first, and if a usermode build is happening, the "ARCH=um" on the command
  138. # line overrides the setting of ARCH below. If a native build is happening,
  139. # then ARCH is assigned, getting whatever value it gets normally, and
  140. # SUBARCH is subsequently ignored.
  141. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  142. -e s/arm.*/arm/ -e s/sa110/arm/ \
  143. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  144. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  145. -e s/sh.*/sh/ )
  146. # Cross compiling and selecting different set of gcc/bin-utils
  147. # ---------------------------------------------------------------------------
  148. #
  149. # When performing cross compilation for other architectures ARCH shall be set
  150. # to the target architecture. (See arch/* for the possibilities).
  151. # ARCH can be set during invocation of make:
  152. # make ARCH=ia64
  153. # Another way is to have ARCH set in the environment.
  154. # The default ARCH is the host where make is executed.
  155. # CROSS_COMPILE specify the prefix used for all executables used
  156. # during compilation. Only gcc and related bin-utils executables
  157. # are prefixed with $(CROSS_COMPILE).
  158. # CROSS_COMPILE can be set on the command line
  159. # make CROSS_COMPILE=ia64-linux-
  160. # Alternatively CROSS_COMPILE can be set in the environment.
  161. # Default value for CROSS_COMPILE is not to prefix executables
  162. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  163. export KBUILD_BUILDHOST := $(SUBARCH)
  164. ARCH ?= $(SUBARCH)
  165. CROSS_COMPILE ?=
  166. # Architecture as present in compile.h
  167. UTS_MACHINE := $(ARCH)
  168. SRCARCH := $(ARCH)
  169. # Additional ARCH settings for x86
  170. ifeq ($(ARCH),i386)
  171. SRCARCH := x86
  172. endif
  173. ifeq ($(ARCH),x86_64)
  174. SRCARCH := x86
  175. endif
  176. KCONFIG_CONFIG ?= .config
  177. # SHELL used by kbuild
  178. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  179. else if [ -x /bin/bash ]; then echo /bin/bash; \
  180. else echo sh; fi ; fi)
  181. HOSTCC = gcc
  182. HOSTCXX = g++
  183. HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  184. HOSTCXXFLAGS = -O2
  185. # Decide whether to build built-in, modular, or both.
  186. # Normally, just do built-in.
  187. KBUILD_MODULES :=
  188. KBUILD_BUILTIN := 1
  189. # If we have only "make modules", don't compile built-in objects.
  190. # When we're building modules with modversions, we need to consider
  191. # the built-in objects during the descend as well, in order to
  192. # make sure the checksums are up to date before we record them.
  193. ifeq ($(MAKECMDGOALS),modules)
  194. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  195. endif
  196. # If we have "make <whatever> modules", compile modules
  197. # in addition to whatever we do anyway.
  198. # Just "make" or "make all" shall build modules as well
  199. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  200. KBUILD_MODULES := 1
  201. endif
  202. ifeq ($(MAKECMDGOALS),)
  203. KBUILD_MODULES := 1
  204. endif
  205. export KBUILD_MODULES KBUILD_BUILTIN
  206. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  207. # Beautify output
  208. # ---------------------------------------------------------------------------
  209. #
  210. # Normally, we echo the whole command before executing it. By making
  211. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  212. # $(quiet) to choose other forms of output instead, e.g.
  213. #
  214. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  215. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  216. #
  217. # If $(quiet) is empty, the whole command will be printed.
  218. # If it is set to "quiet_", only the short version will be printed.
  219. # If it is set to "silent_", nothing will be printed at all, since
  220. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  221. #
  222. # A simple variant is to prefix commands with $(Q) - that's useful
  223. # for commands that shall be hidden in non-verbose mode.
  224. #
  225. # $(Q)ln $@ :<
  226. #
  227. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  228. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  229. ifeq ($(KBUILD_VERBOSE),1)
  230. quiet =
  231. Q =
  232. else
  233. quiet=quiet_
  234. Q = @
  235. endif
  236. # If the user is running make -s (silent mode), suppress echoing of
  237. # commands
  238. ifneq ($(findstring s,$(MAKEFLAGS)),)
  239. quiet=silent_
  240. endif
  241. export quiet Q KBUILD_VERBOSE
  242. # Look for make include files relative to root of kernel src
  243. MAKEFLAGS += --include-dir=$(srctree)
  244. # We need some generic definitions (do not try to remake the file).
  245. $(srctree)/scripts/Kbuild.include: ;
  246. include $(srctree)/scripts/Kbuild.include
  247. # Make variables (CC, etc...)
  248. AS = $(CROSS_COMPILE)as
  249. LD = $(CROSS_COMPILE)ld
  250. CC = $(CROSS_COMPILE)gcc
  251. CPP = $(CC) -E
  252. AR = $(CROSS_COMPILE)ar
  253. NM = $(CROSS_COMPILE)nm
  254. STRIP = $(CROSS_COMPILE)strip
  255. OBJCOPY = $(CROSS_COMPILE)objcopy
  256. OBJDUMP = $(CROSS_COMPILE)objdump
  257. AWK = awk
  258. GENKSYMS = scripts/genksyms/genksyms
  259. DEPMOD = /sbin/depmod
  260. KALLSYMS = scripts/kallsyms
  261. PERL = perl
  262. CHECK = sparse
  263. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
  264. MODFLAGS = -DMODULE
  265. CFLAGS_MODULE = $(MODFLAGS)
  266. AFLAGS_MODULE = $(MODFLAGS)
  267. LDFLAGS_MODULE =
  268. CFLAGS_KERNEL =
  269. AFLAGS_KERNEL =
  270. # Use LINUXINCLUDE when you must reference the include/ directory.
  271. # Needed to be compatible with the O= option
  272. LINUXINCLUDE := -Iinclude \
  273. $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
  274. -include include/linux/autoconf.h
  275. KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
  276. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  277. -fno-strict-aliasing -fno-common \
  278. -Werror-implicit-function-declaration
  279. KBUILD_AFLAGS := -D__ASSEMBLY__
  280. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  281. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  282. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  283. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  284. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  285. export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
  286. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  287. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  288. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
  289. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  290. # When compiling out-of-tree modules, put MODVERDIR in the module
  291. # tree rather than in the kernel tree. The kernel tree might
  292. # even be read-only.
  293. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  294. # Files to ignore in find ... statements
  295. RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
  296. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  297. # ===========================================================================
  298. # Rules shared between *config targets and build targets
  299. # Basic helpers built in scripts/
  300. PHONY += scripts_basic
  301. scripts_basic:
  302. $(Q)$(MAKE) $(build)=scripts/basic
  303. # To avoid any implicit rule to kick in, define an empty command.
  304. scripts/basic/%: scripts_basic ;
  305. PHONY += outputmakefile
  306. # outputmakefile generates a Makefile in the output directory, if using a
  307. # separate output directory. This allows convenient use of make in the
  308. # output directory.
  309. outputmakefile:
  310. ifneq ($(KBUILD_SRC),)
  311. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  312. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  313. endif
  314. # To make sure we do not include .config for any of the *config targets
  315. # catch them early, and hand them over to scripts/kconfig/Makefile
  316. # It is allowed to specify more targets when calling make, including
  317. # mixing *config targets and build targets.
  318. # For example 'make oldconfig all'.
  319. # Detect when mixed targets is specified, and make a second invocation
  320. # of make so .config is not included in this case either (for *config).
  321. no-dot-config-targets := clean mrproper distclean \
  322. cscope TAGS tags help %docs check% \
  323. include/linux/version.h headers_% \
  324. kernelrelease kernelversion
  325. config-targets := 0
  326. mixed-targets := 0
  327. dot-config := 1
  328. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  329. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  330. dot-config := 0
  331. endif
  332. endif
  333. ifeq ($(KBUILD_EXTMOD),)
  334. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  335. config-targets := 1
  336. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  337. mixed-targets := 1
  338. endif
  339. endif
  340. endif
  341. ifeq ($(mixed-targets),1)
  342. # ===========================================================================
  343. # We're called with mixed targets (*config and build targets).
  344. # Handle them one by one.
  345. %:: FORCE
  346. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  347. else
  348. ifeq ($(config-targets),1)
  349. # ===========================================================================
  350. # *config targets only - make sure prerequisites are updated, and descend
  351. # in scripts/kconfig to make the *config target
  352. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  353. # KBUILD_DEFCONFIG may point out an alternative default configuration
  354. # used for 'make defconfig'
  355. include $(srctree)/arch/$(SRCARCH)/Makefile
  356. export KBUILD_DEFCONFIG
  357. config %config: scripts_basic outputmakefile FORCE
  358. $(Q)mkdir -p include/linux include/config
  359. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  360. else
  361. # ===========================================================================
  362. # Build targets only - this includes vmlinux, arch specific targets, clean
  363. # targets and others. In general all targets except *config targets.
  364. ifeq ($(KBUILD_EXTMOD),)
  365. # Additional helpers built in scripts/
  366. # Carefully list dependencies so we do not try to build scripts twice
  367. # in parallel
  368. PHONY += scripts
  369. scripts: scripts_basic include/config/auto.conf
  370. $(Q)$(MAKE) $(build)=$(@)
  371. # Objects we will link into vmlinux / subdirs we need to visit
  372. init-y := init/
  373. drivers-y := drivers/ sound/
  374. net-y := net/
  375. libs-y := lib/
  376. core-y := usr/
  377. endif # KBUILD_EXTMOD
  378. ifeq ($(dot-config),1)
  379. # Read in config
  380. -include include/config/auto.conf
  381. ifeq ($(KBUILD_EXTMOD),)
  382. # Read in dependencies to all Kconfig* files, make sure to run
  383. # oldconfig if changes are detected.
  384. -include include/config/auto.conf.cmd
  385. # To avoid any implicit rule to kick in, define an empty command
  386. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  387. # If .config is newer than include/config/auto.conf, someone tinkered
  388. # with it and forgot to run make oldconfig.
  389. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  390. # we execute the config step to be sure to catch updated Kconfig files
  391. include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  392. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  393. else
  394. # external modules needs include/linux/autoconf.h and include/config/auto.conf
  395. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  396. PHONY += include/config/auto.conf
  397. include/config/auto.conf:
  398. $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
  399. echo; \
  400. echo " ERROR: Kernel configuration is invalid."; \
  401. echo " include/linux/autoconf.h or $@ are missing."; \
  402. echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  403. echo; \
  404. /bin/false)
  405. endif # KBUILD_EXTMOD
  406. else
  407. # Dummy target needed, because used as prerequisite
  408. include/config/auto.conf: ;
  409. endif # $(dot-config)
  410. # The all: target is the default when no target is given on the
  411. # command line.
  412. # This allow a user to issue only 'make' to build a kernel including modules
  413. # Defaults vmlinux but it is usually overridden in the arch makefile
  414. all: vmlinux
  415. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  416. KBUILD_CFLAGS += -Os
  417. else
  418. KBUILD_CFLAGS += -O2
  419. endif
  420. ifneq (CONFIG_FRAME_WARN,0)
  421. KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  422. endif
  423. # Force gcc to behave correct even for buggy distributions
  424. # Arch Makefiles may override this setting
  425. KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
  426. include $(srctree)/arch/$(SRCARCH)/Makefile
  427. ifdef CONFIG_FRAME_POINTER
  428. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  429. else
  430. KBUILD_CFLAGS += -fomit-frame-pointer
  431. endif
  432. ifdef CONFIG_DEBUG_INFO
  433. KBUILD_CFLAGS += -g
  434. KBUILD_AFLAGS += -gdwarf-2
  435. endif
  436. ifdef CONFIG_FTRACE
  437. KBUILD_CFLAGS += -pg
  438. endif
  439. # We trigger additional mismatches with less inlining
  440. ifdef CONFIG_DEBUG_SECTION_MISMATCH
  441. KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  442. endif
  443. # arch Makefile may override CC so keep this after arch Makefile is included
  444. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  445. CHECKFLAGS += $(NOSTDINC_FLAGS)
  446. # warn about C99 declaration after statement
  447. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  448. # disable pointer signed / unsigned warnings in gcc 4.0
  449. KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  450. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  451. # But warn user when we do so
  452. warn-assign = \
  453. $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
  454. ifneq ($(KCPPFLAGS),)
  455. $(call warn-assign,CPPFLAGS)
  456. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  457. endif
  458. ifneq ($(KAFLAGS),)
  459. $(call warn-assign,AFLAGS)
  460. KBUILD_AFLAGS += $(KAFLAGS)
  461. endif
  462. ifneq ($(KCFLAGS),)
  463. $(call warn-assign,CFLAGS)
  464. KBUILD_CFLAGS += $(KCFLAGS)
  465. endif
  466. # Use --build-id when available.
  467. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  468. $(call ld-option, -Wl$(comma)--build-id,))
  469. LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  470. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  471. # Default kernel image to build when no specific target is given.
  472. # KBUILD_IMAGE may be overruled on the command line or
  473. # set in the environment
  474. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  475. # this default value
  476. export KBUILD_IMAGE ?= vmlinux
  477. #
  478. # INSTALL_PATH specifies where to place the updated kernel and system map
  479. # images. Default is /boot, but you can set it to other values
  480. export INSTALL_PATH ?= /boot
  481. #
  482. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  483. # relocations required by build roots. This is not defined in the
  484. # makefile but the argument can be passed to make if needed.
  485. #
  486. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  487. export MODLIB
  488. #
  489. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  490. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  491. # the default option --strip-debug will be used. Otherwise,
  492. # INSTALL_MOD_STRIP will used as the options to the strip command.
  493. ifdef INSTALL_MOD_STRIP
  494. ifeq ($(INSTALL_MOD_STRIP),1)
  495. mod_strip_cmd = $(STRIP) --strip-debug
  496. else
  497. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  498. endif # INSTALL_MOD_STRIP=1
  499. else
  500. mod_strip_cmd = true
  501. endif # INSTALL_MOD_STRIP
  502. export mod_strip_cmd
  503. ifeq ($(KBUILD_EXTMOD),)
  504. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  505. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  506. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  507. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  508. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  509. $(init-n) $(init-) \
  510. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  511. $(net-n) $(net-) $(libs-n) $(libs-))))
  512. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  513. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  514. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  515. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  516. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  517. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  518. libs-y := $(libs-y1) $(libs-y2)
  519. # Build vmlinux
  520. # ---------------------------------------------------------------------------
  521. # vmlinux is built from the objects selected by $(vmlinux-init) and
  522. # $(vmlinux-main). Most are built-in.o files from top-level directories
  523. # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  524. # Ordering when linking is important, and $(vmlinux-init) must be first.
  525. #
  526. # vmlinux
  527. # ^
  528. # |
  529. # +-< $(vmlinux-init)
  530. # | +--< init/version.o + more
  531. # |
  532. # +--< $(vmlinux-main)
  533. # | +--< driver/built-in.o mm/built-in.o + more
  534. # |
  535. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  536. #
  537. # vmlinux version (uname -v) cannot be updated during normal
  538. # descending-into-subdirs phase since we do not yet know if we need to
  539. # update vmlinux.
  540. # Therefore this step is delayed until just before final link of vmlinux -
  541. # except in the kallsyms case where it is done just before adding the
  542. # symbols to the kernel.
  543. #
  544. # System.map is generated to document addresses of all kernel symbols
  545. vmlinux-init := $(head-y) $(init-y)
  546. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  547. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  548. vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
  549. export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
  550. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  551. # May be overridden by arch/$(ARCH)/Makefile
  552. quiet_cmd_vmlinux__ ?= LD $@
  553. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  554. -T $(vmlinux-lds) $(vmlinux-init) \
  555. --start-group $(vmlinux-main) --end-group \
  556. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
  557. # Generate new vmlinux version
  558. quiet_cmd_vmlinux_version = GEN .version
  559. cmd_vmlinux_version = set -e; \
  560. if [ ! -r .version ]; then \
  561. rm -f .version; \
  562. echo 1 >.version; \
  563. else \
  564. mv .version .old_version; \
  565. expr 0$$(cat .old_version) + 1 >.version; \
  566. fi; \
  567. $(MAKE) $(build)=init
  568. # Generate System.map
  569. quiet_cmd_sysmap = SYSMAP
  570. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  571. # Link of vmlinux
  572. # If CONFIG_KALLSYMS is set .version is already updated
  573. # Generate System.map and verify that the content is consistent
  574. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  575. # First command is ':' to allow us to use + in front of the rule
  576. define rule_vmlinux__
  577. :
  578. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  579. $(call cmd,vmlinux__)
  580. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  581. $(Q)$(if $($(quiet)cmd_sysmap), \
  582. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  583. $(cmd_sysmap) $@ System.map; \
  584. if [ $$? -ne 0 ]; then \
  585. rm -f $@; \
  586. /bin/false; \
  587. fi;
  588. $(verify_kallsyms)
  589. endef
  590. ifdef CONFIG_KALLSYMS
  591. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  592. # It's a three stage process:
  593. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  594. # empty
  595. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  596. # the right size - vmlinux version (uname -v) is updated during this step
  597. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  598. # but due to the added section, some addresses have shifted.
  599. # From here, we generate a correct .tmp_kallsyms2.o
  600. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  601. # o Verify that the System.map from vmlinux matches the map from
  602. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  603. # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
  604. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  605. # temporary bypass to allow the kernel to be built while the
  606. # maintainers work out what went wrong with kallsyms.
  607. ifdef CONFIG_KALLSYMS_EXTRA_PASS
  608. last_kallsyms := 3
  609. else
  610. last_kallsyms := 2
  611. endif
  612. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  613. define verify_kallsyms
  614. $(Q)$(if $($(quiet)cmd_sysmap), \
  615. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  616. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  617. $(Q)cmp -s System.map .tmp_System.map || \
  618. (echo Inconsistent kallsyms data; \
  619. echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
  620. rm .tmp_kallsyms* ; /bin/false )
  621. endef
  622. # Update vmlinux version before link
  623. # Use + in front of this rule to silent warning about make -j1
  624. # First command is ':' to allow us to use + in front of this rule
  625. cmd_ksym_ld = $(cmd_vmlinux__)
  626. define rule_ksym_ld
  627. :
  628. +$(call cmd,vmlinux_version)
  629. $(call cmd,vmlinux__)
  630. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  631. endef
  632. # Generate .S file with all kernel symbols
  633. quiet_cmd_kallsyms = KSYM $@
  634. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  635. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  636. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  637. $(call if_changed_dep,as_o_S)
  638. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  639. $(call cmd,kallsyms)
  640. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  641. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  642. $(call if_changed_rule,ksym_ld)
  643. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  644. $(call if_changed,vmlinux__)
  645. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  646. $(call if_changed,vmlinux__)
  647. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  648. $(KALLSYMS): scripts ;
  649. # Generate some data for debugging strange kallsyms problems
  650. debug_kallsyms: .tmp_map$(last_kallsyms)
  651. .tmp_map%: .tmp_vmlinux% FORCE
  652. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  653. .tmp_map3: .tmp_map2
  654. .tmp_map2: .tmp_map1
  655. endif # ifdef CONFIG_KALLSYMS
  656. # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
  657. # relevant sections renamed as per the linker script.
  658. quiet_cmd_vmlinux-modpost = LD $@
  659. cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
  660. $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
  661. $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
  662. define rule_vmlinux-modpost
  663. :
  664. +$(call cmd,vmlinux-modpost)
  665. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  666. $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
  667. endef
  668. # vmlinux image - including updated kernel symbols
  669. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
  670. ifdef CONFIG_HEADERS_CHECK
  671. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  672. endif
  673. ifdef CONFIG_SAMPLES
  674. $(Q)$(MAKE) $(build)=samples
  675. endif
  676. $(call vmlinux-modpost)
  677. $(call if_changed_rule,vmlinux__)
  678. $(Q)rm -f .old_version
  679. # build vmlinux.o first to catch section mismatch errors early
  680. ifdef CONFIG_KALLSYMS
  681. .tmp_vmlinux1: vmlinux.o
  682. endif
  683. modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
  684. vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
  685. $(call if_changed_rule,vmlinux-modpost)
  686. # The actual objects are generated when descending,
  687. # make sure no implicit rule kicks in
  688. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  689. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  690. # Preset locale variables to speed up the build process. Limit locale
  691. # tweaks to this spot to avoid wrong language settings when running
  692. # make menuconfig etc.
  693. # Error messages still appears in the original language
  694. PHONY += $(vmlinux-dirs)
  695. $(vmlinux-dirs): prepare scripts
  696. $(Q)$(MAKE) $(build)=$@
  697. # Build the kernel release string
  698. #
  699. # The KERNELRELEASE value built here is stored in the file
  700. # include/config/kernel.release, and is used when executing several
  701. # make targets, such as "make install" or "make modules_install."
  702. #
  703. # The eventual kernel release string consists of the following fields,
  704. # shown in a hierarchical format to show how smaller parts are concatenated
  705. # to form the larger and final value, with values coming from places like
  706. # the Makefile, kernel config options, make command line options and/or
  707. # SCM tag information.
  708. #
  709. # $(KERNELVERSION)
  710. # $(VERSION) eg, 2
  711. # $(PATCHLEVEL) eg, 6
  712. # $(SUBLEVEL) eg, 18
  713. # $(EXTRAVERSION) eg, -rc6
  714. # $(localver-full)
  715. # $(localver)
  716. # localversion* (files without backups, containing '~')
  717. # $(CONFIG_LOCALVERSION) (from kernel config setting)
  718. # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
  719. # ./scripts/setlocalversion (SCM tag, if one exists)
  720. # $(LOCALVERSION) (from make command line if provided)
  721. #
  722. # Note how the final $(localver-auto) string is included *only* if the
  723. # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
  724. # moment, only git is supported but other SCMs can edit the script
  725. # scripts/setlocalversion and add the appropriate checks as needed.
  726. pattern = ".*/localversion[^~]*"
  727. string = $(shell cat /dev/null \
  728. `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
  729. localver = $(subst $(space),, $(string) \
  730. $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
  731. # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
  732. # and if the SCM is know a tag from the SCM is appended.
  733. # The appended tag is determined by the SCM used.
  734. #
  735. # Currently, only git is supported.
  736. # Other SCMs can edit scripts/setlocalversion and add the appropriate
  737. # checks as needed.
  738. ifdef CONFIG_LOCALVERSION_AUTO
  739. _localver-auto = $(shell $(CONFIG_SHELL) \
  740. $(srctree)/scripts/setlocalversion $(srctree))
  741. localver-auto = $(LOCALVERSION)$(_localver-auto)
  742. endif
  743. localver-full = $(localver)$(localver-auto)
  744. # Store (new) KERNELRELASE string in include/config/kernel.release
  745. kernelrelease = $(KERNELVERSION)$(localver-full)
  746. include/config/kernel.release: include/config/auto.conf FORCE
  747. $(Q)rm -f $@
  748. $(Q)echo $(kernelrelease) > $@
  749. # Things we need to do before we recursively start building the kernel
  750. # or the modules are listed in "prepare".
  751. # A multi level approach is used. prepareN is processed before prepareN-1.
  752. # archprepare is used in arch Makefiles and when processed asm symlink,
  753. # version.h and scripts_basic is processed / created.
  754. # Listed in dependency order
  755. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  756. # prepare3 is used to check if we are building in a separate output directory,
  757. # and if so do:
  758. # 1) Check that make has not been executed in the kernel src $(srctree)
  759. # 2) Create the include2 directory, used for the second asm symlink
  760. prepare3: include/config/kernel.release
  761. ifneq ($(KBUILD_SRC),)
  762. @echo ' Using $(srctree) as source for kernel'
  763. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  764. echo " $(srctree) is not clean, please run 'make mrproper'";\
  765. echo " in the '$(srctree)' directory.";\
  766. /bin/false; \
  767. fi;
  768. $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
  769. $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
  770. endif
  771. # prepare2 creates a makefile if using a separate output directory
  772. prepare2: prepare3 outputmakefile
  773. prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
  774. include/asm include/config/auto.conf
  775. $(cmd_crmodverdir)
  776. archprepare: prepare1 scripts_basic
  777. prepare0: archprepare FORCE
  778. $(Q)$(MAKE) $(build)=.
  779. $(Q)$(MAKE) $(build)=. missing-syscalls
  780. # All the preparing..
  781. prepare: prepare0
  782. # Leave this as default for preprocessing vmlinux.lds.S, which is now
  783. # done in arch/$(ARCH)/kernel/Makefile
  784. export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
  785. # The asm symlink changes when $(ARCH) changes.
  786. # Detect this and ask user to run make mrproper
  787. include/asm: FORCE
  788. $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
  789. if [ -L include/asm ]; then \
  790. if [ "$$asmlink" != "$(SRCARCH)" ]; then \
  791. echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
  792. echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
  793. exit 1; \
  794. fi; \
  795. else \
  796. echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
  797. if [ ! -d include ]; then \
  798. mkdir -p include; \
  799. fi; \
  800. ln -fsn asm-$(SRCARCH) $@; \
  801. fi
  802. # Generate some files
  803. # ---------------------------------------------------------------------------
  804. # KERNELRELEASE can change from a few different places, meaning version.h
  805. # needs to be updated, so this check is forced on all builds
  806. uts_len := 64
  807. define filechk_utsrelease.h
  808. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  809. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  810. exit 1; \
  811. fi; \
  812. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  813. endef
  814. define filechk_version.h
  815. (echo \#define LINUX_VERSION_CODE $(shell \
  816. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  817. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  818. endef
  819. include/linux/version.h: $(srctree)/Makefile FORCE
  820. $(call filechk,version.h)
  821. include/linux/utsrelease.h: include/config/kernel.release FORCE
  822. $(call filechk,utsrelease.h)
  823. # ---------------------------------------------------------------------------
  824. PHONY += depend dep
  825. depend dep:
  826. @echo '*** Warning: make $@ is unnecessary now.'
  827. # ---------------------------------------------------------------------------
  828. # Kernel headers
  829. INSTALL_HDR_PATH=$(objtree)/usr
  830. export INSTALL_HDR_PATH
  831. HDRFILTER=generic i386 x86_64
  832. HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
  833. PHONY += headers_install_all
  834. headers_install_all: include/linux/version.h scripts_basic FORCE
  835. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  836. $(Q)for arch in $(HDRARCHES); do \
  837. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
  838. done
  839. PHONY += headers_install
  840. headers_install: include/linux/version.h scripts_basic FORCE
  841. @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  842. echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
  843. exit 1 ; fi
  844. $(Q)$(MAKE) $(build)=scripts scripts/unifdef
  845. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
  846. PHONY += headers_check_all
  847. headers_check_all: headers_install_all
  848. $(Q)for arch in $(HDRARCHES); do \
  849. $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
  850. done
  851. PHONY += headers_check
  852. headers_check: headers_install
  853. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
  854. # ---------------------------------------------------------------------------
  855. # Modules
  856. ifdef CONFIG_MODULES
  857. # By default, build modules as well
  858. all: modules
  859. # Build modules
  860. #
  861. # A module can be listed more than once in obj-m resulting in
  862. # duplicate lines in modules.order files. Those are removed
  863. # using awk while concatenating to the final file.
  864. PHONY += modules
  865. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
  866. $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
  867. @echo ' Building modules, stage 2.';
  868. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  869. # Target to prepare building external modules
  870. PHONY += modules_prepare
  871. modules_prepare: prepare scripts
  872. # Target to install modules
  873. PHONY += modules_install
  874. modules_install: _modinst_ _modinst_post
  875. PHONY += _modinst_
  876. _modinst_:
  877. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  878. echo "Warning: you may need to install module-init-tools"; \
  879. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  880. sleep 1; \
  881. fi
  882. @rm -rf $(MODLIB)/kernel
  883. @rm -f $(MODLIB)/source
  884. @mkdir -p $(MODLIB)/kernel
  885. @ln -s $(srctree) $(MODLIB)/source
  886. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  887. rm -f $(MODLIB)/build ; \
  888. ln -s $(objtree) $(MODLIB)/build ; \
  889. fi
  890. @cp -f $(objtree)/modules.order $(MODLIB)/
  891. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  892. # This depmod is only for convenience to give the initial
  893. # boot a modules.dep even before / is mounted read-write. However the
  894. # boot script depmod is the master version.
  895. PHONY += _modinst_post
  896. _modinst_post: _modinst_
  897. $(call cmd,depmod)
  898. else # CONFIG_MODULES
  899. # Modules not configured
  900. # ---------------------------------------------------------------------------
  901. modules modules_install: FORCE
  902. @echo
  903. @echo "The present kernel configuration has modules disabled."
  904. @echo "Type 'make config' and enable loadable module support."
  905. @echo "Then build a kernel with module support enabled."
  906. @echo
  907. @exit 1
  908. endif # CONFIG_MODULES
  909. ###
  910. # Cleaning is done on three levels.
  911. # make clean Delete most generated files
  912. # Leave enough to build external modules
  913. # make mrproper Delete the current configuration, and all generated files
  914. # make distclean Remove editor backup files, patch leftover files and the like
  915. # Directories & files removed with 'make clean'
  916. CLEAN_DIRS += $(MODVERDIR)
  917. CLEAN_FILES += vmlinux System.map \
  918. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  919. # Directories & files removed with 'make mrproper'
  920. MRPROPER_DIRS += include/config include2 usr/include
  921. MRPROPER_FILES += .config .config.old include/asm .version .old_version \
  922. include/linux/autoconf.h include/linux/version.h \
  923. include/linux/utsrelease.h \
  924. include/linux/bounds.h include/asm*/asm-offsets.h \
  925. Module.symvers tags TAGS cscope*
  926. # clean - Delete most, but leave enough to build external modules
  927. #
  928. clean: rm-dirs := $(CLEAN_DIRS)
  929. clean: rm-files := $(CLEAN_FILES)
  930. clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
  931. PHONY += $(clean-dirs) clean archclean
  932. $(clean-dirs):
  933. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  934. clean: archclean $(clean-dirs)
  935. $(call cmd,rmdirs)
  936. $(call cmd,rmfiles)
  937. @find . $(RCS_FIND_IGNORE) \
  938. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  939. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  940. -o -name '*.symtypes' -o -name 'modules.order' \) \
  941. -type f -print | xargs rm -f
  942. # mrproper - Delete all generated files, including .config
  943. #
  944. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  945. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  946. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  947. PHONY += $(mrproper-dirs) mrproper archmrproper
  948. $(mrproper-dirs):
  949. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  950. mrproper: clean archmrproper $(mrproper-dirs)
  951. $(call cmd,rmdirs)
  952. $(call cmd,rmfiles)
  953. # distclean
  954. #
  955. PHONY += distclean
  956. distclean: mrproper
  957. @find $(srctree) $(RCS_FIND_IGNORE) \
  958. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  959. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  960. -o -name '.*.rej' -o -size 0 \
  961. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  962. -type f -print | xargs rm -f
  963. # Packaging of the kernel to various formats
  964. # ---------------------------------------------------------------------------
  965. # rpm target kept for backward compatibility
  966. package-dir := $(srctree)/scripts/package
  967. %pkg: include/config/kernel.release FORCE
  968. $(Q)$(MAKE) $(build)=$(package-dir) $@
  969. rpm: include/config/kernel.release FORCE
  970. $(Q)$(MAKE) $(build)=$(package-dir) $@
  971. # Brief documentation of the typical targets used
  972. # ---------------------------------------------------------------------------
  973. boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
  974. boards := $(notdir $(boards))
  975. board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  976. board-dirs := $(sort $(notdir $(board-dirs:/=)))
  977. help:
  978. @echo 'Cleaning targets:'
  979. @echo ' clean - Remove most generated files but keep the config and'
  980. @echo ' enough build support to build external modules'
  981. @echo ' mrproper - Remove all generated files + config + various backup files'
  982. @echo ' distclean - mrproper + remove editor backup and patch files'
  983. @echo ''
  984. @echo 'Configuration targets:'
  985. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  986. @echo ''
  987. @echo 'Other generic targets:'
  988. @echo ' all - Build all targets marked with [*]'
  989. @echo '* vmlinux - Build the bare kernel'
  990. @echo '* modules - Build all modules'
  991. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  992. @echo ' dir/ - Build all files in dir and below'
  993. @echo ' dir/file.[ois] - Build specified target only'
  994. @echo ' dir/file.ko - Build module including final link'
  995. @echo ' prepare - Set up for building external modules'
  996. @echo ' tags/TAGS - Generate tags file for editors'
  997. @echo ' cscope - Generate cscope index'
  998. @echo ' kernelrelease - Output the release version string'
  999. @echo ' kernelversion - Output the version stored in Makefile'
  1000. @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  1001. echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  1002. echo ' (default: $(INSTALL_HDR_PATH))'; \
  1003. fi
  1004. @echo ''
  1005. @echo 'Static analysers'
  1006. @echo ' checkstack - Generate a list of stack hogs'
  1007. @echo ' namespacecheck - Name space analysis on compiled kernel'
  1008. @echo ' versioncheck - Sanity check on version.h usage'
  1009. @echo ' includecheck - Check for duplicate included header files'
  1010. @echo ' export_report - List the usages of all exported symbols'
  1011. @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
  1012. echo ' headers_check - Sanity check on exported headers'; \
  1013. fi
  1014. @echo ''
  1015. @echo 'Kernel packaging:'
  1016. @$(MAKE) $(build)=$(package-dir) help
  1017. @echo ''
  1018. @echo 'Documentation targets:'
  1019. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  1020. @echo ''
  1021. @echo 'Architecture specific targets ($(SRCARCH)):'
  1022. @$(if $(archhelp),$(archhelp),\
  1023. echo ' No architecture specific help defined for $(SRCARCH)')
  1024. @echo ''
  1025. @$(if $(boards), \
  1026. $(foreach b, $(boards), \
  1027. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  1028. echo '')
  1029. @$(if $(board-dirs), \
  1030. $(foreach b, $(board-dirs), \
  1031. printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
  1032. printf " %-16s - Show all of the above\\n" help-boards; \
  1033. echo '')
  1034. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1035. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  1036. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  1037. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  1038. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  1039. @echo ''
  1040. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  1041. @echo 'For further info see the ./README file'
  1042. help-board-dirs := $(addprefix help-,$(board-dirs))
  1043. help-boards: $(help-board-dirs)
  1044. boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
  1045. $(help-board-dirs): help-%:
  1046. @echo 'Architecture specific targets ($(SRCARCH) $*):'
  1047. @$(if $(boards-per-dir), \
  1048. $(foreach b, $(boards-per-dir), \
  1049. printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
  1050. echo '')
  1051. # Documentation targets
  1052. # ---------------------------------------------------------------------------
  1053. %docs: scripts_basic FORCE
  1054. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  1055. else # KBUILD_EXTMOD
  1056. ###
  1057. # External module support.
  1058. # When building external modules the kernel used as basis is considered
  1059. # read-only, and no consistency checks are made and the make
  1060. # system is not used on the basis kernel. If updates are required
  1061. # in the basis kernel ordinary make commands (without M=...) must
  1062. # be used.
  1063. #
  1064. # The following are the only valid targets when building external
  1065. # modules.
  1066. # make M=dir clean Delete all automatically generated files
  1067. # make M=dir modules Make all modules in specified dir
  1068. # make M=dir Same as 'make M=dir modules'
  1069. # make M=dir modules_install
  1070. # Install the modules built in the module directory
  1071. # Assumes install directory is already created
  1072. # We are always building modules
  1073. KBUILD_MODULES := 1
  1074. PHONY += crmodverdir
  1075. crmodverdir:
  1076. $(cmd_crmodverdir)
  1077. PHONY += $(objtree)/Module.symvers
  1078. $(objtree)/Module.symvers:
  1079. @test -e $(objtree)/Module.symvers || ( \
  1080. echo; \
  1081. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1082. echo " is missing; modules will have no dependencies and modversions."; \
  1083. echo )
  1084. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1085. PHONY += $(module-dirs) modules
  1086. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1087. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1088. modules: $(module-dirs)
  1089. @echo ' Building modules, stage 2.';
  1090. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1091. PHONY += modules_install
  1092. modules_install: _emodinst_ _emodinst_post
  1093. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1094. PHONY += _emodinst_
  1095. _emodinst_:
  1096. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1097. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1098. PHONY += _emodinst_post
  1099. _emodinst_post: _emodinst_
  1100. $(call cmd,depmod)
  1101. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1102. PHONY += $(clean-dirs) clean
  1103. $(clean-dirs):
  1104. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1105. clean: rm-dirs := $(MODVERDIR)
  1106. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1107. clean: $(clean-dirs)
  1108. $(call cmd,rmdirs)
  1109. $(call cmd,rmfiles)
  1110. @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
  1111. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1112. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
  1113. -type f -print | xargs rm -f
  1114. help:
  1115. @echo ' Building external modules.'
  1116. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1117. @echo ''
  1118. @echo ' modules - default target, build the module(s)'
  1119. @echo ' modules_install - install the module'
  1120. @echo ' clean - remove generated files in module directory only'
  1121. @echo ''
  1122. # Dummies...
  1123. PHONY += prepare scripts
  1124. prepare: ;
  1125. scripts: ;
  1126. endif # KBUILD_EXTMOD
  1127. # Generate tags for editors
  1128. # ---------------------------------------------------------------------------
  1129. #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
  1130. #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
  1131. #Adding $(srctree) adds about 20M on i386 to the size of the output file!
  1132. ifeq ($(src),$(obj))
  1133. __srctree =
  1134. else
  1135. __srctree = $(srctree)/
  1136. endif
  1137. ifeq ($(ALLSOURCE_ARCHS),)
  1138. ifeq ($(ARCH),um)
  1139. ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
  1140. else
  1141. ALLINCLUDE_ARCHS := $(SRCARCH)
  1142. endif
  1143. else
  1144. #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
  1145. ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
  1146. endif
  1147. ALLSOURCE_ARCHS := $(SRCARCH)
  1148. define find-sources
  1149. ( for arch in $(ALLSOURCE_ARCHS) ; do \
  1150. find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
  1151. -name $1 -print; \
  1152. done ; \
  1153. find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
  1154. -name $1 -print; \
  1155. find $(__srctree)include $(RCS_FIND_IGNORE) \
  1156. \( -name config -o -name 'asm-*' \) -prune \
  1157. -o -name $1 -print; \
  1158. for arch in $(ALLINCLUDE_ARCHS) ; do \
  1159. find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
  1160. -name $1 -print; \
  1161. done ; \
  1162. find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
  1163. -name $1 -print; \
  1164. find $(__srctree) $(RCS_FIND_IGNORE) \
  1165. \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
  1166. -name $1 -print; \
  1167. )
  1168. endef
  1169. define all-sources
  1170. $(call find-sources,'*.[chS]')
  1171. endef
  1172. define all-kconfigs
  1173. $(call find-sources,'Kconfig*')
  1174. endef
  1175. define all-defconfigs
  1176. $(call find-sources,'defconfig')
  1177. endef
  1178. define xtags
  1179. if $1 --version 2>&1 | grep -iq exuberant; then \
  1180. $(all-sources) | xargs $1 -a \
  1181. -I __initdata,__exitdata,__acquires,__releases \
  1182. -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
  1183. -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
  1184. --extra=+f --c-kinds=+px \
  1185. --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
  1186. $(all-kconfigs) | xargs $1 -a \
  1187. --langdef=kconfig \
  1188. --language-force=kconfig \
  1189. --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
  1190. $(all-defconfigs) | xargs -r $1 -a \
  1191. --langdef=dotconfig \
  1192. --language-force=dotconfig \
  1193. --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
  1194. elif $1 --version 2>&1 | grep -iq emacs; then \
  1195. $(all-sources) | xargs $1 -a; \
  1196. $(all-kconfigs) | xargs $1 -a \
  1197. --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
  1198. $(all-defconfigs) | xargs -r $1 -a \
  1199. --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
  1200. else \
  1201. $(all-sources) | xargs $1 -a; \
  1202. fi
  1203. endef
  1204. quiet_cmd_cscope-file = FILELST cscope.files
  1205. cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
  1206. quiet_cmd_cscope = MAKE cscope.out
  1207. cmd_cscope = cscope -b
  1208. cscope: FORCE
  1209. $(call cmd,cscope-file)
  1210. $(call cmd,cscope)
  1211. quiet_cmd_TAGS = MAKE $@
  1212. define cmd_TAGS
  1213. rm -f $@; \
  1214. $(call xtags,etags)
  1215. endef
  1216. TAGS: FORCE
  1217. $(call cmd,TAGS)
  1218. quiet_cmd_tags = MAKE $@
  1219. define cmd_tags
  1220. rm -f $@; \
  1221. $(call xtags,ctags)
  1222. endef
  1223. tags: FORCE
  1224. $(call cmd,tags)
  1225. # Scripts to check various things for consistency
  1226. # ---------------------------------------------------------------------------
  1227. includecheck:
  1228. find * $(RCS_FIND_IGNORE) \
  1229. -name '*.[hcS]' -type f -print | sort \
  1230. | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
  1231. versioncheck:
  1232. find * $(RCS_FIND_IGNORE) \
  1233. -name '*.[hcS]' -type f -print | sort \
  1234. | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
  1235. namespacecheck:
  1236. $(PERL) $(srctree)/scripts/namespace.pl
  1237. export_report:
  1238. $(PERL) $(srctree)/scripts/export_report.pl
  1239. endif #ifeq ($(config-targets),1)
  1240. endif #ifeq ($(mixed-targets),1)
  1241. PHONY += checkstack kernelrelease kernelversion
  1242. # UML needs a little special treatment here. It wants to use the host
  1243. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1244. # else wants $(ARCH), including people doing cross-builds, which means
  1245. # that $(SUBARCH) doesn't work here.
  1246. ifeq ($(ARCH), um)
  1247. CHECKSTACK_ARCH := $(SUBARCH)
  1248. else
  1249. CHECKSTACK_ARCH := $(ARCH)
  1250. endif
  1251. checkstack:
  1252. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1253. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1254. kernelrelease:
  1255. $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
  1256. $(error kernelrelease not valid - run 'make prepare' to update it))
  1257. kernelversion:
  1258. @echo $(KERNELVERSION)
  1259. # Single targets
  1260. # ---------------------------------------------------------------------------
  1261. # Single targets are compatible with:
  1262. # - build with mixed source and output
  1263. # - build with separate output dir 'make O=...'
  1264. # - external modules
  1265. #
  1266. # target-dir => where to store outputfile
  1267. # build-dir => directory in kernel source tree to use
  1268. ifeq ($(KBUILD_EXTMOD),)
  1269. build-dir = $(patsubst %/,%,$(dir $@))
  1270. target-dir = $(dir $@)
  1271. else
  1272. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1273. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1274. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1275. endif
  1276. %.s: %.c prepare scripts FORCE
  1277. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1278. %.i: %.c prepare scripts FORCE
  1279. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1280. %.o: %.c prepare scripts FORCE
  1281. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1282. %.lst: %.c prepare scripts FORCE
  1283. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1284. %.s: %.S prepare scripts FORCE
  1285. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1286. %.o: %.S prepare scripts FORCE
  1287. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1288. %.symtypes: %.c prepare scripts FORCE
  1289. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1290. # Modules
  1291. / %/: prepare scripts FORCE
  1292. $(cmd_crmodverdir)
  1293. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1294. $(build)=$(build-dir)
  1295. %.ko: prepare scripts FORCE
  1296. $(cmd_crmodverdir)
  1297. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1298. $(build)=$(build-dir) $(@:.ko=.o)
  1299. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1300. # FIXME Should go into a make.lib or something
  1301. # ===========================================================================
  1302. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1303. cmd_rmdirs = rm -rf $(rm-dirs)
  1304. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1305. cmd_rmfiles = rm -f $(rm-files)
  1306. # Run depmod only if we have System.map and depmod is executable
  1307. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1308. cmd_depmod = \
  1309. if [ -r System.map -a -x $(DEPMOD) ]; then \
  1310. $(DEPMOD) -ae -F System.map \
  1311. $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
  1312. $(KERNELRELEASE); \
  1313. fi
  1314. # Create temporary dir for module support files
  1315. # clean it up only when building all modules
  1316. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1317. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1318. a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
  1319. $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
  1320. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1321. quiet_cmd_as_o_S = AS $@
  1322. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1323. # read all saved command lines
  1324. targets := $(wildcard $(sort $(targets)))
  1325. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1326. ifneq ($(cmd_files),)
  1327. $(cmd_files): ; # Do not try to update included dependency files
  1328. include $(cmd_files)
  1329. endif
  1330. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1331. # Usage:
  1332. # $(Q)$(MAKE) $(clean)=dir
  1333. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1334. endif # skip-makefile
  1335. PHONY += FORCE
  1336. FORCE:
  1337. # Declare the contents of the .PHONY variable as phony. We keep that
  1338. # information in a variable se we can use it in if_changed and friends.
  1339. .PHONY: $(PHONY)