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  1. VERSION = 3
  2. PATCHLEVEL = 8
  3. SUBLEVEL = 0
  4. EXTRAVERSION =
  5. NAME = Unicycling Gorilla
  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. # Avoid funny character set dependencies
  17. unexport LC_ALL
  18. LC_COLLATE=C
  19. LC_NUMERIC=C
  20. export LC_COLLATE LC_NUMERIC
  21. # We are using a recursive build, so we need to do a little thinking
  22. # to get the ordering right.
  23. #
  24. # Most importantly: sub-Makefiles should only ever modify files in
  25. # their own directory. If in some directory we have a dependency on
  26. # a file in another dir (which doesn't happen often, but it's often
  27. # unavoidable when linking the built-in.o targets which finally
  28. # turn into vmlinux), we will call a sub make in that other dir, and
  29. # after that we are sure that everything which is in that other dir
  30. # is now up to date.
  31. #
  32. # The only cases where we need to modify files which have global
  33. # effects are thus separated out and done before the recursive
  34. # descending is started. They are now explicitly listed as the
  35. # prepare rule.
  36. # To put more focus on warnings, be less verbose as default
  37. # Use 'make V=1' to see the full commands
  38. ifeq ("$(origin V)", "command line")
  39. KBUILD_VERBOSE = $(V)
  40. endif
  41. ifndef KBUILD_VERBOSE
  42. KBUILD_VERBOSE = 0
  43. endif
  44. # Call a source code checker (by default, "sparse") as part of the
  45. # C compilation.
  46. #
  47. # Use 'make C=1' to enable checking of only re-compiled files.
  48. # Use 'make C=2' to enable checking of *all* source files, regardless
  49. # of whether they are re-compiled or not.
  50. #
  51. # See the file "Documentation/sparse.txt" for more details, including
  52. # where to get the "sparse" utility.
  53. ifeq ("$(origin C)", "command line")
  54. KBUILD_CHECKSRC = $(C)
  55. endif
  56. ifndef KBUILD_CHECKSRC
  57. KBUILD_CHECKSRC = 0
  58. endif
  59. # Use make M=dir to specify directory of external module to build
  60. # Old syntax make ... SUBDIRS=$PWD is still supported
  61. # Setting the environment variable KBUILD_EXTMOD take precedence
  62. ifdef SUBDIRS
  63. KBUILD_EXTMOD ?= $(SUBDIRS)
  64. endif
  65. ifeq ("$(origin M)", "command line")
  66. KBUILD_EXTMOD := $(M)
  67. endif
  68. # kbuild supports saving output files in a separate directory.
  69. # To locate output files in a separate directory two syntaxes are supported.
  70. # In both cases the working directory must be the root of the kernel src.
  71. # 1) O=
  72. # Use "make O=dir/to/store/output/files/"
  73. #
  74. # 2) Set KBUILD_OUTPUT
  75. # Set the environment variable KBUILD_OUTPUT to point to the directory
  76. # where the output files shall be placed.
  77. # export KBUILD_OUTPUT=dir/to/store/output/files/
  78. # make
  79. #
  80. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  81. # variable.
  82. # KBUILD_SRC is set on invocation of make in OBJ directory
  83. # KBUILD_SRC is not intended to be used by the regular user (for now)
  84. ifeq ($(KBUILD_SRC),)
  85. # OK, Make called in directory where kernel src resides
  86. # Do we want to locate output files in a separate directory?
  87. ifeq ("$(origin O)", "command line")
  88. KBUILD_OUTPUT := $(O)
  89. endif
  90. ifeq ("$(origin W)", "command line")
  91. export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
  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. @:
  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. objtree := $(CURDIR)
  129. src := $(srctree)
  130. obj := $(objtree)
  131. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  132. export srctree objtree VPATH
  133. # SUBARCH tells the usermode build what the underlying arch is. That is set
  134. # first, and if a usermode build is happening, the "ARCH=um" on the command
  135. # line overrides the setting of ARCH below. If a native build is happening,
  136. # then ARCH is assigned, getting whatever value it gets normally, and
  137. # SUBARCH is subsequently ignored.
  138. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  139. -e s/arm.*/arm/ -e s/sa110/arm/ \
  140. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  141. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  142. -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
  143. # Cross compiling and selecting different set of gcc/bin-utils
  144. # ---------------------------------------------------------------------------
  145. #
  146. # When performing cross compilation for other architectures ARCH shall be set
  147. # to the target architecture. (See arch/* for the possibilities).
  148. # ARCH can be set during invocation of make:
  149. # make ARCH=ia64
  150. # Another way is to have ARCH set in the environment.
  151. # The default ARCH is the host where make is executed.
  152. # CROSS_COMPILE specify the prefix used for all executables used
  153. # during compilation. Only gcc and related bin-utils executables
  154. # are prefixed with $(CROSS_COMPILE).
  155. # CROSS_COMPILE can be set on the command line
  156. # make CROSS_COMPILE=ia64-linux-
  157. # Alternatively CROSS_COMPILE can be set in the environment.
  158. # A third alternative is to store a setting in .config so that plain
  159. # "make" in the configured kernel build directory always uses that.
  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 ?= $(CONFIG_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),sparc32)
  177. SRCARCH := sparc
  178. endif
  179. ifeq ($(ARCH),sparc64)
  180. SRCARCH := sparc
  181. endif
  182. # Additional ARCH settings for sh
  183. ifeq ($(ARCH),sh64)
  184. SRCARCH := sh
  185. endif
  186. # Additional ARCH settings for tile
  187. ifeq ($(ARCH),tilepro)
  188. SRCARCH := tile
  189. endif
  190. ifeq ($(ARCH),tilegx)
  191. SRCARCH := tile
  192. endif
  193. # Where to locate arch specific headers
  194. hdr-arch := $(SRCARCH)
  195. KCONFIG_CONFIG ?= .config
  196. export KCONFIG_CONFIG
  197. # SHELL used by kbuild
  198. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  199. else if [ -x /bin/bash ]; then echo /bin/bash; \
  200. else echo sh; fi ; fi)
  201. HOSTCC = gcc
  202. HOSTCXX = g++
  203. HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
  204. HOSTCXXFLAGS = -O2
  205. # Decide whether to build built-in, modular, or both.
  206. # Normally, just do built-in.
  207. KBUILD_MODULES :=
  208. KBUILD_BUILTIN := 1
  209. # If we have only "make modules", don't compile built-in objects.
  210. # When we're building modules with modversions, we need to consider
  211. # the built-in objects during the descend as well, in order to
  212. # make sure the checksums are up to date before we record them.
  213. ifeq ($(MAKECMDGOALS),modules)
  214. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  215. endif
  216. # If we have "make <whatever> modules", compile modules
  217. # in addition to whatever we do anyway.
  218. # Just "make" or "make all" shall build modules as well
  219. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  220. KBUILD_MODULES := 1
  221. endif
  222. ifeq ($(MAKECMDGOALS),)
  223. KBUILD_MODULES := 1
  224. endif
  225. export KBUILD_MODULES KBUILD_BUILTIN
  226. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  227. # Beautify output
  228. # ---------------------------------------------------------------------------
  229. #
  230. # Normally, we echo the whole command before executing it. By making
  231. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  232. # $(quiet) to choose other forms of output instead, e.g.
  233. #
  234. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  235. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  236. #
  237. # If $(quiet) is empty, the whole command will be printed.
  238. # If it is set to "quiet_", only the short version will be printed.
  239. # If it is set to "silent_", nothing will be printed at all, since
  240. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  241. #
  242. # A simple variant is to prefix commands with $(Q) - that's useful
  243. # for commands that shall be hidden in non-verbose mode.
  244. #
  245. # $(Q)ln $@ :<
  246. #
  247. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  248. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  249. ifeq ($(KBUILD_VERBOSE),1)
  250. quiet =
  251. Q =
  252. else
  253. quiet=quiet_
  254. Q = @
  255. endif
  256. # If the user is running make -s (silent mode), suppress echoing of
  257. # commands
  258. ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
  259. quiet=silent_
  260. endif
  261. export quiet Q KBUILD_VERBOSE
  262. # Look for make include files relative to root of kernel src
  263. MAKEFLAGS += --include-dir=$(srctree)
  264. # We need some generic definitions (do not try to remake the file).
  265. $(srctree)/scripts/Kbuild.include: ;
  266. include $(srctree)/scripts/Kbuild.include
  267. # Make variables (CC, etc...)
  268. AS = $(CROSS_COMPILE)as
  269. LD = $(CROSS_COMPILE)ld
  270. CC = $(CROSS_COMPILE)gcc
  271. CPP = $(CC) -E
  272. AR = $(CROSS_COMPILE)ar
  273. NM = $(CROSS_COMPILE)nm
  274. STRIP = $(CROSS_COMPILE)strip
  275. OBJCOPY = $(CROSS_COMPILE)objcopy
  276. OBJDUMP = $(CROSS_COMPILE)objdump
  277. AWK = awk
  278. GENKSYMS = scripts/genksyms/genksyms
  279. INSTALLKERNEL := installkernel
  280. DEPMOD = /sbin/depmod
  281. PERL = perl
  282. CHECK = sparse
  283. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
  284. -Wbitwise -Wno-return-void $(CF)
  285. CFLAGS_MODULE =
  286. AFLAGS_MODULE =
  287. LDFLAGS_MODULE =
  288. CFLAGS_KERNEL =
  289. AFLAGS_KERNEL =
  290. CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
  291. # Use USERINCLUDE when you must reference the UAPI directories only.
  292. USERINCLUDE := \
  293. -I$(srctree)/arch/$(hdr-arch)/include/uapi \
  294. -Iarch/$(hdr-arch)/include/generated/uapi \
  295. -I$(srctree)/include/uapi \
  296. -Iinclude/generated/uapi \
  297. -include $(srctree)/include/linux/kconfig.h
  298. # Use LINUXINCLUDE when you must reference the include/ directory.
  299. # Needed to be compatible with the O= option
  300. LINUXINCLUDE := \
  301. -I$(srctree)/arch/$(hdr-arch)/include \
  302. -Iarch/$(hdr-arch)/include/generated \
  303. $(if $(KBUILD_SRC), -I$(srctree)/include) \
  304. -Iinclude \
  305. $(USERINCLUDE)
  306. KBUILD_CPPFLAGS := -D__KERNEL__
  307. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  308. -fno-strict-aliasing -fno-common \
  309. -Werror-implicit-function-declaration \
  310. -Wno-format-security \
  311. -fno-delete-null-pointer-checks
  312. KBUILD_AFLAGS_KERNEL :=
  313. KBUILD_CFLAGS_KERNEL :=
  314. KBUILD_AFLAGS := -D__ASSEMBLY__
  315. KBUILD_AFLAGS_MODULE := -DMODULE
  316. KBUILD_CFLAGS_MODULE := -DMODULE
  317. KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
  318. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  319. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  320. KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
  321. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  322. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  323. export CPP AR NM STRIP OBJCOPY OBJDUMP
  324. export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
  325. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  326. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  327. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
  328. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  329. export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
  330. export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
  331. export KBUILD_ARFLAGS
  332. # When compiling out-of-tree modules, put MODVERDIR in the module
  333. # tree rather than in the kernel tree. The kernel tree might
  334. # even be read-only.
  335. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  336. # Files to ignore in find ... statements
  337. RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
  338. -o -name .pc -o -name .hg -o -name .git \) -prune -o
  339. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
  340. --exclude CVS --exclude .pc --exclude .hg --exclude .git
  341. # ===========================================================================
  342. # Rules shared between *config targets and build targets
  343. # Basic helpers built in scripts/
  344. PHONY += scripts_basic
  345. scripts_basic:
  346. $(Q)$(MAKE) $(build)=scripts/basic
  347. $(Q)rm -f .tmp_quiet_recordmcount
  348. # To avoid any implicit rule to kick in, define an empty command.
  349. scripts/basic/%: scripts_basic ;
  350. PHONY += outputmakefile
  351. # outputmakefile generates a Makefile in the output directory, if using a
  352. # separate output directory. This allows convenient use of make in the
  353. # output directory.
  354. outputmakefile:
  355. ifneq ($(KBUILD_SRC),)
  356. $(Q)ln -fsn $(srctree) source
  357. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  358. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  359. endif
  360. # Support for using generic headers in asm-generic
  361. PHONY += asm-generic
  362. asm-generic:
  363. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
  364. src=asm obj=arch/$(SRCARCH)/include/generated/asm
  365. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
  366. src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
  367. # To make sure we do not include .config for any of the *config targets
  368. # catch them early, and hand them over to scripts/kconfig/Makefile
  369. # It is allowed to specify more targets when calling make, including
  370. # mixing *config targets and build targets.
  371. # For example 'make oldconfig all'.
  372. # Detect when mixed targets is specified, and make a second invocation
  373. # of make so .config is not included in this case either (for *config).
  374. version_h := include/generated/uapi/linux/version.h
  375. no-dot-config-targets := clean mrproper distclean \
  376. cscope gtags TAGS tags help %docs check% coccicheck \
  377. $(version_h) headers_% archheaders archscripts \
  378. kernelversion %src-pkg
  379. config-targets := 0
  380. mixed-targets := 0
  381. dot-config := 1
  382. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  383. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  384. dot-config := 0
  385. endif
  386. endif
  387. ifeq ($(KBUILD_EXTMOD),)
  388. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  389. config-targets := 1
  390. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  391. mixed-targets := 1
  392. endif
  393. endif
  394. endif
  395. ifeq ($(mixed-targets),1)
  396. # ===========================================================================
  397. # We're called with mixed targets (*config and build targets).
  398. # Handle them one by one.
  399. %:: FORCE
  400. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  401. else
  402. ifeq ($(config-targets),1)
  403. # ===========================================================================
  404. # *config targets only - make sure prerequisites are updated, and descend
  405. # in scripts/kconfig to make the *config target
  406. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  407. # KBUILD_DEFCONFIG may point out an alternative default configuration
  408. # used for 'make defconfig'
  409. include $(srctree)/arch/$(SRCARCH)/Makefile
  410. export KBUILD_DEFCONFIG KBUILD_KCONFIG
  411. config: scripts_basic outputmakefile FORCE
  412. $(Q)mkdir -p include/linux include/config
  413. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  414. %config: scripts_basic outputmakefile FORCE
  415. $(Q)mkdir -p include/linux include/config
  416. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  417. else
  418. # ===========================================================================
  419. # Build targets only - this includes vmlinux, arch specific targets, clean
  420. # targets and others. In general all targets except *config targets.
  421. ifeq ($(KBUILD_EXTMOD),)
  422. # Additional helpers built in scripts/
  423. # Carefully list dependencies so we do not try to build scripts twice
  424. # in parallel
  425. PHONY += scripts
  426. scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
  427. $(Q)$(MAKE) $(build)=$(@)
  428. # Objects we will link into vmlinux / subdirs we need to visit
  429. init-y := init/
  430. drivers-y := drivers/ sound/ firmware/
  431. net-y := net/
  432. libs-y := lib/
  433. core-y := usr/
  434. endif # KBUILD_EXTMOD
  435. ifeq ($(dot-config),1)
  436. # Read in config
  437. -include include/config/auto.conf
  438. ifeq ($(KBUILD_EXTMOD),)
  439. # Read in dependencies to all Kconfig* files, make sure to run
  440. # oldconfig if changes are detected.
  441. -include include/config/auto.conf.cmd
  442. # To avoid any implicit rule to kick in, define an empty command
  443. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  444. # If .config is newer than include/config/auto.conf, someone tinkered
  445. # with it and forgot to run make oldconfig.
  446. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  447. # we execute the config step to be sure to catch updated Kconfig files
  448. include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  449. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  450. else
  451. # external modules needs include/generated/autoconf.h and include/config/auto.conf
  452. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  453. PHONY += include/config/auto.conf
  454. include/config/auto.conf:
  455. $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
  456. echo >&2; \
  457. echo >&2 " ERROR: Kernel configuration is invalid."; \
  458. echo >&2 " include/generated/autoconf.h or $@ are missing.";\
  459. echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  460. echo >&2 ; \
  461. /bin/false)
  462. endif # KBUILD_EXTMOD
  463. else
  464. # Dummy target needed, because used as prerequisite
  465. include/config/auto.conf: ;
  466. endif # $(dot-config)
  467. # The all: target is the default when no target is given on the
  468. # command line.
  469. # This allow a user to issue only 'make' to build a kernel including modules
  470. # Defaults to vmlinux, but the arch makefile usually adds further targets
  471. all: vmlinux
  472. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  473. KBUILD_CFLAGS += -Os
  474. else
  475. KBUILD_CFLAGS += -O2
  476. endif
  477. include $(srctree)/arch/$(SRCARCH)/Makefile
  478. ifdef CONFIG_READABLE_ASM
  479. # Disable optimizations that make assembler listings hard to read.
  480. # reorder blocks reorders the control in the function
  481. # ipa clone creates specialized cloned functions
  482. # partial inlining inlines only parts of functions
  483. KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
  484. $(call cc-option,-fno-ipa-cp-clone,) \
  485. $(call cc-option,-fno-partial-inlining)
  486. endif
  487. ifneq ($(CONFIG_FRAME_WARN),0)
  488. KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  489. endif
  490. # Force gcc to behave correct even for buggy distributions
  491. ifndef CONFIG_CC_STACKPROTECTOR
  492. KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
  493. endif
  494. # This warning generated too much noise in a regular build.
  495. # Use make W=1 to enable this warning (see scripts/Makefile.build)
  496. KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
  497. ifdef CONFIG_FRAME_POINTER
  498. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  499. else
  500. # Some targets (ARM with Thumb2, for example), can't be built with frame
  501. # pointers. For those, we don't have FUNCTION_TRACER automatically
  502. # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
  503. # incompatible with -fomit-frame-pointer with current GCC, so we don't use
  504. # -fomit-frame-pointer with FUNCTION_TRACER.
  505. ifndef CONFIG_FUNCTION_TRACER
  506. KBUILD_CFLAGS += -fomit-frame-pointer
  507. endif
  508. endif
  509. ifdef CONFIG_DEBUG_INFO
  510. KBUILD_CFLAGS += -g
  511. KBUILD_AFLAGS += -gdwarf-2
  512. endif
  513. ifdef CONFIG_DEBUG_INFO_REDUCED
  514. KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
  515. endif
  516. ifdef CONFIG_FUNCTION_TRACER
  517. ifdef CONFIG_HAVE_FENTRY
  518. CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
  519. endif
  520. KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
  521. KBUILD_AFLAGS += $(CC_USING_FENTRY)
  522. ifdef CONFIG_DYNAMIC_FTRACE
  523. ifdef CONFIG_HAVE_C_RECORDMCOUNT
  524. BUILD_C_RECORDMCOUNT := y
  525. export BUILD_C_RECORDMCOUNT
  526. endif
  527. endif
  528. endif
  529. # We trigger additional mismatches with less inlining
  530. ifdef CONFIG_DEBUG_SECTION_MISMATCH
  531. KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  532. endif
  533. # arch Makefile may override CC so keep this after arch Makefile is included
  534. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  535. CHECKFLAGS += $(NOSTDINC_FLAGS)
  536. # warn about C99 declaration after statement
  537. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  538. # disable pointer signed / unsigned warnings in gcc 4.0
  539. KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
  540. # disable invalid "can't wrap" optimizations for signed / pointers
  541. KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
  542. # conserve stack if available
  543. KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
  544. # use the deterministic mode of AR if available
  545. KBUILD_ARFLAGS := $(call ar-option,D)
  546. # check for 'asm goto'
  547. ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
  548. KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
  549. endif
  550. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  551. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  552. KBUILD_AFLAGS += $(KAFLAGS)
  553. KBUILD_CFLAGS += $(KCFLAGS)
  554. # Use --build-id when available.
  555. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  556. $(call cc-ldoption, -Wl$(comma)--build-id,))
  557. KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  558. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  559. ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
  560. LDFLAGS_vmlinux += $(call ld-option, -X,)
  561. endif
  562. # Default kernel image to build when no specific target is given.
  563. # KBUILD_IMAGE may be overruled on the command line or
  564. # set in the environment
  565. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  566. # this default value
  567. export KBUILD_IMAGE ?= vmlinux
  568. #
  569. # INSTALL_PATH specifies where to place the updated kernel and system map
  570. # images. Default is /boot, but you can set it to other values
  571. export INSTALL_PATH ?= /boot
  572. #
  573. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  574. # relocations required by build roots. This is not defined in the
  575. # makefile but the argument can be passed to make if needed.
  576. #
  577. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  578. export MODLIB
  579. #
  580. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  581. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  582. # the default option --strip-debug will be used. Otherwise,
  583. # INSTALL_MOD_STRIP value will be used as the options to the strip command.
  584. ifdef INSTALL_MOD_STRIP
  585. ifeq ($(INSTALL_MOD_STRIP),1)
  586. mod_strip_cmd = $(STRIP) --strip-debug
  587. else
  588. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  589. endif # INSTALL_MOD_STRIP=1
  590. else
  591. mod_strip_cmd = true
  592. endif # INSTALL_MOD_STRIP
  593. export mod_strip_cmd
  594. ifeq ($(CONFIG_MODULE_SIG),y)
  595. MODSECKEY = ./signing_key.priv
  596. MODPUBKEY = ./signing_key.x509
  597. export MODPUBKEY
  598. mod_sign_cmd = perl $(srctree)/scripts/sign-file $(MODSECKEY) $(MODPUBKEY)
  599. else
  600. mod_sign_cmd = true
  601. endif
  602. export mod_sign_cmd
  603. ifeq ($(KBUILD_EXTMOD),)
  604. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  605. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  606. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  607. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  608. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  609. $(init-n) $(init-) \
  610. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  611. $(net-n) $(net-) $(libs-n) $(libs-))))
  612. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  613. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  614. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  615. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  616. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  617. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  618. libs-y := $(libs-y1) $(libs-y2)
  619. # Externally visible symbols (used by link-vmlinux.sh)
  620. export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
  621. export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  622. export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
  623. export LDFLAGS_vmlinux
  624. vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
  625. # Final link of vmlinux
  626. cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
  627. quiet_cmd_link-vmlinux = LINK $@
  628. # Include targets which we want to
  629. # execute if the rest of the kernel build went well.
  630. vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
  631. ifdef CONFIG_HEADERS_CHECK
  632. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  633. endif
  634. ifdef CONFIG_SAMPLES
  635. $(Q)$(MAKE) $(build)=samples
  636. endif
  637. ifdef CONFIG_BUILD_DOCSRC
  638. $(Q)$(MAKE) $(build)=Documentation
  639. endif
  640. +$(call if_changed,link-vmlinux)
  641. # The actual objects are generated when descending,
  642. # make sure no implicit rule kicks in
  643. $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
  644. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  645. # Preset locale variables to speed up the build process. Limit locale
  646. # tweaks to this spot to avoid wrong language settings when running
  647. # make menuconfig etc.
  648. # Error messages still appears in the original language
  649. PHONY += $(vmlinux-dirs)
  650. $(vmlinux-dirs): prepare scripts
  651. $(Q)$(MAKE) $(build)=$@
  652. # Store (new) KERNELRELASE string in include/config/kernel.release
  653. include/config/kernel.release: include/config/auto.conf FORCE
  654. $(Q)rm -f $@
  655. $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
  656. # Things we need to do before we recursively start building the kernel
  657. # or the modules are listed in "prepare".
  658. # A multi level approach is used. prepareN is processed before prepareN-1.
  659. # archprepare is used in arch Makefiles and when processed asm symlink,
  660. # version.h and scripts_basic is processed / created.
  661. # Listed in dependency order
  662. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  663. # prepare3 is used to check if we are building in a separate output directory,
  664. # and if so do:
  665. # 1) Check that make has not been executed in the kernel src $(srctree)
  666. prepare3: include/config/kernel.release
  667. ifneq ($(KBUILD_SRC),)
  668. @$(kecho) ' Using $(srctree) as source for kernel'
  669. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  670. echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
  671. echo >&2 " in the '$(srctree)' directory.";\
  672. /bin/false; \
  673. fi;
  674. endif
  675. # prepare2 creates a makefile if using a separate output directory
  676. prepare2: prepare3 outputmakefile asm-generic
  677. prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
  678. include/config/auto.conf
  679. $(cmd_crmodverdir)
  680. archprepare: archheaders archscripts prepare1 scripts_basic
  681. prepare0: archprepare FORCE
  682. $(Q)$(MAKE) $(build)=.
  683. # All the preparing..
  684. prepare: prepare0
  685. # Generate some files
  686. # ---------------------------------------------------------------------------
  687. # KERNELRELEASE can change from a few different places, meaning version.h
  688. # needs to be updated, so this check is forced on all builds
  689. uts_len := 64
  690. define filechk_utsrelease.h
  691. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  692. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  693. exit 1; \
  694. fi; \
  695. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  696. endef
  697. define filechk_version.h
  698. (echo \#define LINUX_VERSION_CODE $(shell \
  699. expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
  700. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  701. endef
  702. $(version_h): $(srctree)/Makefile FORCE
  703. $(call filechk,version.h)
  704. include/generated/utsrelease.h: include/config/kernel.release FORCE
  705. $(call filechk,utsrelease.h)
  706. PHONY += headerdep
  707. headerdep:
  708. $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
  709. $(srctree)/scripts/headerdep.pl -I$(srctree)/include
  710. # ---------------------------------------------------------------------------
  711. PHONY += depend dep
  712. depend dep:
  713. @echo '*** Warning: make $@ is unnecessary now.'
  714. # ---------------------------------------------------------------------------
  715. # Firmware install
  716. INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
  717. export INSTALL_FW_PATH
  718. PHONY += firmware_install
  719. firmware_install: FORCE
  720. @mkdir -p $(objtree)/firmware
  721. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
  722. # ---------------------------------------------------------------------------
  723. # Kernel headers
  724. #Default location for installed headers
  725. export INSTALL_HDR_PATH = $(objtree)/usr
  726. hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
  727. # If we do an all arch process set dst to asm-$(hdr-arch)
  728. hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
  729. PHONY += archheaders
  730. archheaders:
  731. PHONY += archscripts
  732. archscripts:
  733. PHONY += __headers
  734. __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
  735. $(Q)$(MAKE) $(build)=scripts build_unifdef
  736. PHONY += headers_install_all
  737. headers_install_all:
  738. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
  739. PHONY += headers_install
  740. headers_install: __headers
  741. $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
  742. $(error Headers not exportable for the $(SRCARCH) architecture))
  743. $(Q)$(MAKE) $(hdr-inst)=include/uapi
  744. $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
  745. PHONY += headers_check_all
  746. headers_check_all: headers_install_all
  747. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
  748. PHONY += headers_check
  749. headers_check: headers_install
  750. $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
  751. $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
  752. # ---------------------------------------------------------------------------
  753. # Modules
  754. ifdef CONFIG_MODULES
  755. # By default, build modules as well
  756. all: modules
  757. # Build modules
  758. #
  759. # A module can be listed more than once in obj-m resulting in
  760. # duplicate lines in modules.order files. Those are removed
  761. # using awk while concatenating to the final file.
  762. PHONY += modules
  763. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
  764. $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
  765. @$(kecho) ' Building modules, stage 2.';
  766. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  767. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
  768. modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
  769. $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
  770. %/modules.builtin: include/config/auto.conf
  771. $(Q)$(MAKE) $(modbuiltin)=$*
  772. # Target to prepare building external modules
  773. PHONY += modules_prepare
  774. modules_prepare: prepare scripts
  775. # Target to install modules
  776. PHONY += modules_install
  777. modules_install: _modinst_ _modinst_post
  778. PHONY += _modinst_
  779. _modinst_:
  780. @rm -rf $(MODLIB)/kernel
  781. @rm -f $(MODLIB)/source
  782. @mkdir -p $(MODLIB)/kernel
  783. @ln -s $(srctree) $(MODLIB)/source
  784. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  785. rm -f $(MODLIB)/build ; \
  786. ln -s $(objtree) $(MODLIB)/build ; \
  787. fi
  788. @cp -f $(objtree)/modules.order $(MODLIB)/
  789. @cp -f $(objtree)/modules.builtin $(MODLIB)/
  790. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  791. # This depmod is only for convenience to give the initial
  792. # boot a modules.dep even before / is mounted read-write. However the
  793. # boot script depmod is the master version.
  794. PHONY += _modinst_post
  795. _modinst_post: _modinst_
  796. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
  797. $(call cmd,depmod)
  798. ifeq ($(CONFIG_MODULE_SIG), y)
  799. PHONY += modules_sign
  800. modules_sign:
  801. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
  802. endif
  803. else # CONFIG_MODULES
  804. # Modules not configured
  805. # ---------------------------------------------------------------------------
  806. modules modules_install: FORCE
  807. @echo >&2
  808. @echo >&2 "The present kernel configuration has modules disabled."
  809. @echo >&2 "Type 'make config' and enable loadable module support."
  810. @echo >&2 "Then build a kernel with module support enabled."
  811. @echo >&2
  812. @exit 1
  813. endif # CONFIG_MODULES
  814. ###
  815. # Cleaning is done on three levels.
  816. # make clean Delete most generated files
  817. # Leave enough to build external modules
  818. # make mrproper Delete the current configuration, and all generated files
  819. # make distclean Remove editor backup files, patch leftover files and the like
  820. # Directories & files removed with 'make clean'
  821. CLEAN_DIRS += $(MODVERDIR)
  822. # Directories & files removed with 'make mrproper'
  823. MRPROPER_DIRS += include/config usr/include include/generated \
  824. arch/*/include/generated
  825. MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
  826. Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
  827. signing_key.priv signing_key.x509 x509.genkey \
  828. extra_certificates signing_key.x509.keyid \
  829. signing_key.x509.signer
  830. # clean - Delete most, but leave enough to build external modules
  831. #
  832. clean: rm-dirs := $(CLEAN_DIRS)
  833. clean: rm-files := $(CLEAN_FILES)
  834. clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
  835. PHONY += $(clean-dirs) clean archclean vmlinuxclean
  836. $(clean-dirs):
  837. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  838. vmlinuxclean:
  839. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
  840. clean: archclean vmlinuxclean
  841. # mrproper - Delete all generated files, including .config
  842. #
  843. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  844. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  845. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  846. PHONY += $(mrproper-dirs) mrproper archmrproper
  847. $(mrproper-dirs):
  848. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  849. mrproper: clean archmrproper $(mrproper-dirs)
  850. $(call cmd,rmdirs)
  851. $(call cmd,rmfiles)
  852. # distclean
  853. #
  854. PHONY += distclean
  855. distclean: mrproper
  856. @find $(srctree) $(RCS_FIND_IGNORE) \
  857. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  858. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  859. -o -name '.*.rej' \
  860. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  861. -type f -print | xargs rm -f
  862. # Packaging of the kernel to various formats
  863. # ---------------------------------------------------------------------------
  864. # rpm target kept for backward compatibility
  865. package-dir := $(srctree)/scripts/package
  866. %src-pkg: FORCE
  867. $(Q)$(MAKE) $(build)=$(package-dir) $@
  868. %pkg: include/config/kernel.release FORCE
  869. $(Q)$(MAKE) $(build)=$(package-dir) $@
  870. rpm: include/config/kernel.release FORCE
  871. $(Q)$(MAKE) $(build)=$(package-dir) $@
  872. # Brief documentation of the typical targets used
  873. # ---------------------------------------------------------------------------
  874. boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
  875. boards := $(notdir $(boards))
  876. board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  877. board-dirs := $(sort $(notdir $(board-dirs:/=)))
  878. help:
  879. @echo 'Cleaning targets:'
  880. @echo ' clean - Remove most generated files but keep the config and'
  881. @echo ' enough build support to build external modules'
  882. @echo ' mrproper - Remove all generated files + config + various backup files'
  883. @echo ' distclean - mrproper + remove editor backup and patch files'
  884. @echo ''
  885. @echo 'Configuration targets:'
  886. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  887. @echo ''
  888. @echo 'Other generic targets:'
  889. @echo ' all - Build all targets marked with [*]'
  890. @echo '* vmlinux - Build the bare kernel'
  891. @echo '* modules - Build all modules'
  892. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  893. @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
  894. @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
  895. @echo ' dir/ - Build all files in dir and below'
  896. @echo ' dir/file.[oisS] - Build specified target only'
  897. @echo ' dir/file.lst - Build specified mixed source/assembly target only'
  898. @echo ' (requires a recent binutils and recent build (System.map))'
  899. @echo ' dir/file.ko - Build module including final link'
  900. @echo ' modules_prepare - Set up for building external modules'
  901. @echo ' tags/TAGS - Generate tags file for editors'
  902. @echo ' cscope - Generate cscope index'
  903. @echo ' gtags - Generate GNU GLOBAL index'
  904. @echo ' kernelrelease - Output the release version string'
  905. @echo ' kernelversion - Output the version stored in Makefile'
  906. @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  907. echo ' (default: $(INSTALL_HDR_PATH))'; \
  908. echo ''
  909. @echo 'Static analysers'
  910. @echo ' checkstack - Generate a list of stack hogs'
  911. @echo ' namespacecheck - Name space analysis on compiled kernel'
  912. @echo ' versioncheck - Sanity check on version.h usage'
  913. @echo ' includecheck - Check for duplicate included header files'
  914. @echo ' export_report - List the usages of all exported symbols'
  915. @echo ' headers_check - Sanity check on exported headers'
  916. @echo ' headerdep - Detect inclusion cycles in headers'
  917. @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
  918. @echo ''
  919. @echo 'Kernel packaging:'
  920. @$(MAKE) $(build)=$(package-dir) help
  921. @echo ''
  922. @echo 'Documentation targets:'
  923. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  924. @echo ''
  925. @echo 'Architecture specific targets ($(SRCARCH)):'
  926. @$(if $(archhelp),$(archhelp),\
  927. echo ' No architecture specific help defined for $(SRCARCH)')
  928. @echo ''
  929. @$(if $(boards), \
  930. $(foreach b, $(boards), \
  931. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  932. echo '')
  933. @$(if $(board-dirs), \
  934. $(foreach b, $(board-dirs), \
  935. printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
  936. printf " %-16s - Show all of the above\\n" help-boards; \
  937. echo '')
  938. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  939. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  940. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  941. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  942. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  943. @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
  944. @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
  945. @echo ' 1: warnings which may be relevant and do not occur too often'
  946. @echo ' 2: warnings which occur quite often but may still be relevant'
  947. @echo ' 3: more obscure warnings, can most likely be ignored'
  948. @echo ' Multiple levels can be combined with W=12 or W=123'
  949. @echo ''
  950. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  951. @echo 'For further info see the ./README file'
  952. help-board-dirs := $(addprefix help-,$(board-dirs))
  953. help-boards: $(help-board-dirs)
  954. boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
  955. $(help-board-dirs): help-%:
  956. @echo 'Architecture specific targets ($(SRCARCH) $*):'
  957. @$(if $(boards-per-dir), \
  958. $(foreach b, $(boards-per-dir), \
  959. printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
  960. echo '')
  961. # Documentation targets
  962. # ---------------------------------------------------------------------------
  963. %docs: scripts_basic FORCE
  964. $(Q)$(MAKE) $(build)=scripts build_docproc
  965. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  966. else # KBUILD_EXTMOD
  967. ###
  968. # External module support.
  969. # When building external modules the kernel used as basis is considered
  970. # read-only, and no consistency checks are made and the make
  971. # system is not used on the basis kernel. If updates are required
  972. # in the basis kernel ordinary make commands (without M=...) must
  973. # be used.
  974. #
  975. # The following are the only valid targets when building external
  976. # modules.
  977. # make M=dir clean Delete all automatically generated files
  978. # make M=dir modules Make all modules in specified dir
  979. # make M=dir Same as 'make M=dir modules'
  980. # make M=dir modules_install
  981. # Install the modules built in the module directory
  982. # Assumes install directory is already created
  983. # We are always building modules
  984. KBUILD_MODULES := 1
  985. PHONY += crmodverdir
  986. crmodverdir:
  987. $(cmd_crmodverdir)
  988. PHONY += $(objtree)/Module.symvers
  989. $(objtree)/Module.symvers:
  990. @test -e $(objtree)/Module.symvers || ( \
  991. echo; \
  992. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  993. echo " is missing; modules will have no dependencies and modversions."; \
  994. echo )
  995. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  996. PHONY += $(module-dirs) modules
  997. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  998. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  999. modules: $(module-dirs)
  1000. @$(kecho) ' Building modules, stage 2.';
  1001. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1002. PHONY += modules_install
  1003. modules_install: _emodinst_ _emodinst_post
  1004. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1005. PHONY += _emodinst_
  1006. _emodinst_:
  1007. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1008. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1009. PHONY += _emodinst_post
  1010. _emodinst_post: _emodinst_
  1011. $(call cmd,depmod)
  1012. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1013. PHONY += $(clean-dirs) clean
  1014. $(clean-dirs):
  1015. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1016. clean: rm-dirs := $(MODVERDIR)
  1017. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1018. help:
  1019. @echo ' Building external modules.'
  1020. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1021. @echo ''
  1022. @echo ' modules - default target, build the module(s)'
  1023. @echo ' modules_install - install the module'
  1024. @echo ' clean - remove generated files in module directory only'
  1025. @echo ''
  1026. # Dummies...
  1027. PHONY += prepare scripts
  1028. prepare: ;
  1029. scripts: ;
  1030. endif # KBUILD_EXTMOD
  1031. clean: $(clean-dirs)
  1032. $(call cmd,rmdirs)
  1033. $(call cmd,rmfiles)
  1034. @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
  1035. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1036. -o -name '*.ko.*' \
  1037. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  1038. -o -name '*.symtypes' -o -name 'modules.order' \
  1039. -o -name modules.builtin -o -name '.tmp_*.o.*' \
  1040. -o -name '*.gcno' \) -type f -print | xargs rm -f
  1041. # Generate tags for editors
  1042. # ---------------------------------------------------------------------------
  1043. quiet_cmd_tags = GEN $@
  1044. cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
  1045. tags TAGS cscope gtags: FORCE
  1046. $(call cmd,tags)
  1047. # Scripts to check various things for consistency
  1048. # ---------------------------------------------------------------------------
  1049. PHONY += includecheck versioncheck coccicheck namespacecheck export_report
  1050. includecheck:
  1051. find $(srctree)/* $(RCS_FIND_IGNORE) \
  1052. -name '*.[hcS]' -type f -print | sort \
  1053. | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
  1054. versioncheck:
  1055. find $(srctree)/* $(RCS_FIND_IGNORE) \
  1056. -name '*.[hcS]' -type f -print | sort \
  1057. | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
  1058. coccicheck:
  1059. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
  1060. namespacecheck:
  1061. $(PERL) $(srctree)/scripts/namespace.pl
  1062. export_report:
  1063. $(PERL) $(srctree)/scripts/export_report.pl
  1064. endif #ifeq ($(config-targets),1)
  1065. endif #ifeq ($(mixed-targets),1)
  1066. PHONY += checkstack kernelrelease kernelversion
  1067. # UML needs a little special treatment here. It wants to use the host
  1068. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1069. # else wants $(ARCH), including people doing cross-builds, which means
  1070. # that $(SUBARCH) doesn't work here.
  1071. ifeq ($(ARCH), um)
  1072. CHECKSTACK_ARCH := $(SUBARCH)
  1073. else
  1074. CHECKSTACK_ARCH := $(ARCH)
  1075. endif
  1076. checkstack:
  1077. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1078. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1079. kernelrelease:
  1080. @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
  1081. kernelversion:
  1082. @echo $(KERNELVERSION)
  1083. # Clear a bunch of variables before executing the submake
  1084. tools/: FORCE
  1085. $(Q)mkdir -p $(objtree)/tools
  1086. $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/
  1087. tools/%: FORCE
  1088. $(Q)mkdir -p $(objtree)/tools
  1089. $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ $*
  1090. # Single targets
  1091. # ---------------------------------------------------------------------------
  1092. # Single targets are compatible with:
  1093. # - build with mixed source and output
  1094. # - build with separate output dir 'make O=...'
  1095. # - external modules
  1096. #
  1097. # target-dir => where to store outputfile
  1098. # build-dir => directory in kernel source tree to use
  1099. ifeq ($(KBUILD_EXTMOD),)
  1100. build-dir = $(patsubst %/,%,$(dir $@))
  1101. target-dir = $(dir $@)
  1102. else
  1103. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1104. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1105. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1106. endif
  1107. %.s: %.c prepare scripts FORCE
  1108. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1109. %.i: %.c prepare scripts FORCE
  1110. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1111. %.o: %.c prepare scripts FORCE
  1112. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1113. %.lst: %.c prepare scripts FORCE
  1114. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1115. %.s: %.S prepare scripts FORCE
  1116. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1117. %.o: %.S prepare scripts FORCE
  1118. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1119. %.symtypes: %.c prepare scripts FORCE
  1120. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1121. # Modules
  1122. /: prepare scripts FORCE
  1123. $(cmd_crmodverdir)
  1124. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1125. $(build)=$(build-dir)
  1126. %/: prepare scripts FORCE
  1127. $(cmd_crmodverdir)
  1128. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1129. $(build)=$(build-dir)
  1130. %.ko: prepare scripts FORCE
  1131. $(cmd_crmodverdir)
  1132. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1133. $(build)=$(build-dir) $(@:.ko=.o)
  1134. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1135. # FIXME Should go into a make.lib or something
  1136. # ===========================================================================
  1137. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1138. cmd_rmdirs = rm -rf $(rm-dirs)
  1139. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1140. cmd_rmfiles = rm -f $(rm-files)
  1141. # Run depmod only if we have System.map and depmod is executable
  1142. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1143. cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
  1144. $(KERNELRELEASE)
  1145. # Create temporary dir for module support files
  1146. # clean it up only when building all modules
  1147. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1148. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1149. # read all saved command lines
  1150. targets := $(wildcard $(sort $(targets)))
  1151. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1152. ifneq ($(cmd_files),)
  1153. $(cmd_files): ; # Do not try to update included dependency files
  1154. include $(cmd_files)
  1155. endif
  1156. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1157. # Usage:
  1158. # $(Q)$(MAKE) $(clean)=dir
  1159. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1160. endif # skip-makefile
  1161. PHONY += FORCE
  1162. FORCE:
  1163. # Declare the contents of the .PHONY variable as phony. We keep that
  1164. # information in a variable so we can use it in if_changed and friends.
  1165. .PHONY: $(PHONY)