heads' kernel

Makefile 56KB

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  1. VERSION = 4
  2. PATCHLEVEL = 4
  3. SUBLEVEL = 52
  4. EXTRAVERSION = -gnu
  5. NAME = Blurry Fish Butt
  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. # o Do not use make's built-in rules and variables
  12. # (this increases performance and avoids hard-to-debug behaviour);
  13. # o Look for make include files relative to root of kernel src
  14. MAKEFLAGS += -rR --include-dir=$(CURDIR)
  15. # Avoid funny character set dependencies
  16. unexport LC_ALL
  17. LC_COLLATE=C
  18. LC_NUMERIC=C
  19. export LC_COLLATE LC_NUMERIC
  20. # Avoid interference with shell env settings
  21. unexport GREP_OPTIONS
  22. # We are using a recursive build, so we need to do a little thinking
  23. # to get the ordering right.
  24. #
  25. # Most importantly: sub-Makefiles should only ever modify files in
  26. # their own directory. If in some directory we have a dependency on
  27. # a file in another dir (which doesn't happen often, but it's often
  28. # unavoidable when linking the built-in.o targets which finally
  29. # turn into vmlinux), we will call a sub make in that other dir, and
  30. # after that we are sure that everything which is in that other dir
  31. # is now up to date.
  32. #
  33. # The only cases where we need to modify files which have global
  34. # effects are thus separated out and done before the recursive
  35. # descending is started. They are now explicitly listed as the
  36. # prepare rule.
  37. # Beautify output
  38. # ---------------------------------------------------------------------------
  39. #
  40. # Normally, we echo the whole command before executing it. By making
  41. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  42. # $(quiet) to choose other forms of output instead, e.g.
  43. #
  44. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  45. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  46. #
  47. # If $(quiet) is empty, the whole command will be printed.
  48. # If it is set to "quiet_", only the short version will be printed.
  49. # If it is set to "silent_", nothing will be printed at all, since
  50. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  51. #
  52. # A simple variant is to prefix commands with $(Q) - that's useful
  53. # for commands that shall be hidden in non-verbose mode.
  54. #
  55. # $(Q)ln $@ :<
  56. #
  57. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  58. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  59. #
  60. # To put more focus on warnings, be less verbose as default
  61. # Use 'make V=1' to see the full commands
  62. ifeq ("$(origin V)", "command line")
  63. KBUILD_VERBOSE = $(V)
  64. endif
  65. ifndef KBUILD_VERBOSE
  66. KBUILD_VERBOSE = 0
  67. endif
  68. ifeq ($(KBUILD_VERBOSE),1)
  69. quiet =
  70. Q =
  71. else
  72. quiet=quiet_
  73. Q = @
  74. endif
  75. # If the user is running make -s (silent mode), suppress echoing of
  76. # commands
  77. ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
  78. ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
  79. quiet=silent_
  80. endif
  81. else # make-3.8x
  82. ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
  83. quiet=silent_
  84. endif
  85. endif
  86. export quiet Q KBUILD_VERBOSE
  87. # kbuild supports saving output files in a separate directory.
  88. # To locate output files in a separate directory two syntaxes are supported.
  89. # In both cases the working directory must be the root of the kernel src.
  90. # 1) O=
  91. # Use "make O=dir/to/store/output/files/"
  92. #
  93. # 2) Set KBUILD_OUTPUT
  94. # Set the environment variable KBUILD_OUTPUT to point to the directory
  95. # where the output files shall be placed.
  96. # export KBUILD_OUTPUT=dir/to/store/output/files/
  97. # make
  98. #
  99. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  100. # variable.
  101. # KBUILD_SRC is set on invocation of make in OBJ directory
  102. # KBUILD_SRC is not intended to be used by the regular user (for now)
  103. ifeq ($(KBUILD_SRC),)
  104. # OK, Make called in directory where kernel src resides
  105. # Do we want to locate output files in a separate directory?
  106. ifeq ("$(origin O)", "command line")
  107. KBUILD_OUTPUT := $(O)
  108. endif
  109. # That's our default target when none is given on the command line
  110. PHONY := _all
  111. _all:
  112. # Cancel implicit rules on top Makefile
  113. $(CURDIR)/Makefile Makefile: ;
  114. ifneq ($(words $(subst :, ,$(CURDIR))), 1)
  115. $(error main directory cannot contain spaces nor colons)
  116. endif
  117. ifneq ($(KBUILD_OUTPUT),)
  118. # Invoke a second make in the output directory, passing relevant variables
  119. # check that the output directory actually exists
  120. saved-output := $(KBUILD_OUTPUT)
  121. KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
  122. && /bin/pwd)
  123. $(if $(KBUILD_OUTPUT),, \
  124. $(error failed to create output directory "$(saved-output)"))
  125. PHONY += $(MAKECMDGOALS) sub-make
  126. $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
  127. @:
  128. sub-make: FORCE
  129. $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
  130. -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
  131. # Leave processing to above invocation of make
  132. skip-makefile := 1
  133. endif # ifneq ($(KBUILD_OUTPUT),)
  134. endif # ifeq ($(KBUILD_SRC),)
  135. # We process the rest of the Makefile if this is the final invocation of make
  136. ifeq ($(skip-makefile),)
  137. # Do not print "Entering directory ...",
  138. # but we want to display it when entering to the output directory
  139. # so that IDEs/editors are able to understand relative filenames.
  140. MAKEFLAGS += --no-print-directory
  141. # Call a source code checker (by default, "sparse") as part of the
  142. # C compilation.
  143. #
  144. # Use 'make C=1' to enable checking of only re-compiled files.
  145. # Use 'make C=2' to enable checking of *all* source files, regardless
  146. # of whether they are re-compiled or not.
  147. #
  148. # See the file "Documentation/sparse.txt" for more details, including
  149. # where to get the "sparse" utility.
  150. ifeq ("$(origin C)", "command line")
  151. KBUILD_CHECKSRC = $(C)
  152. endif
  153. ifndef KBUILD_CHECKSRC
  154. KBUILD_CHECKSRC = 0
  155. endif
  156. # Use make M=dir to specify directory of external module to build
  157. # Old syntax make ... SUBDIRS=$PWD is still supported
  158. # Setting the environment variable KBUILD_EXTMOD take precedence
  159. ifdef SUBDIRS
  160. KBUILD_EXTMOD ?= $(SUBDIRS)
  161. endif
  162. ifeq ("$(origin M)", "command line")
  163. KBUILD_EXTMOD := $(M)
  164. endif
  165. # If building an external module we do not care about the all: rule
  166. # but instead _all depend on modules
  167. PHONY += all
  168. ifeq ($(KBUILD_EXTMOD),)
  169. _all: all
  170. else
  171. _all: modules
  172. endif
  173. ifeq ($(KBUILD_SRC),)
  174. # building in the source tree
  175. srctree := .
  176. else
  177. ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
  178. # building in a subdirectory of the source tree
  179. srctree := ..
  180. else
  181. srctree := $(KBUILD_SRC)
  182. endif
  183. endif
  184. objtree := .
  185. src := $(srctree)
  186. obj := $(objtree)
  187. VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  188. export srctree objtree VPATH
  189. # SUBARCH tells the usermode build what the underlying arch is. That is set
  190. # first, and if a usermode build is happening, the "ARCH=um" on the command
  191. # line overrides the setting of ARCH below. If a native build is happening,
  192. # then ARCH is assigned, getting whatever value it gets normally, and
  193. # SUBARCH is subsequently ignored.
  194. SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
  195. -e s/sun4u/sparc64/ \
  196. -e s/arm.*/arm/ -e s/sa110/arm/ \
  197. -e s/s390x/s390/ -e s/parisc64/parisc/ \
  198. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  199. -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
  200. # Cross compiling and selecting different set of gcc/bin-utils
  201. # ---------------------------------------------------------------------------
  202. #
  203. # When performing cross compilation for other architectures ARCH shall be set
  204. # to the target architecture. (See arch/* for the possibilities).
  205. # ARCH can be set during invocation of make:
  206. # make ARCH=ia64
  207. # Another way is to have ARCH set in the environment.
  208. # The default ARCH is the host where make is executed.
  209. # CROSS_COMPILE specify the prefix used for all executables used
  210. # during compilation. Only gcc and related bin-utils executables
  211. # are prefixed with $(CROSS_COMPILE).
  212. # CROSS_COMPILE can be set on the command line
  213. # make CROSS_COMPILE=ia64-linux-
  214. # Alternatively CROSS_COMPILE can be set in the environment.
  215. # A third alternative is to store a setting in .config so that plain
  216. # "make" in the configured kernel build directory always uses that.
  217. # Default value for CROSS_COMPILE is not to prefix executables
  218. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  219. ARCH ?= $(SUBARCH)
  220. CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
  221. # Architecture as present in compile.h
  222. UTS_MACHINE := $(ARCH)
  223. SRCARCH := $(ARCH)
  224. # Additional ARCH settings for x86
  225. ifeq ($(ARCH),i386)
  226. SRCARCH := x86
  227. endif
  228. ifeq ($(ARCH),x86_64)
  229. SRCARCH := x86
  230. endif
  231. # Additional ARCH settings for sparc
  232. ifeq ($(ARCH),sparc32)
  233. SRCARCH := sparc
  234. endif
  235. ifeq ($(ARCH),sparc64)
  236. SRCARCH := sparc
  237. endif
  238. # Additional ARCH settings for sh
  239. ifeq ($(ARCH),sh64)
  240. SRCARCH := sh
  241. endif
  242. # Additional ARCH settings for tile
  243. ifeq ($(ARCH),tilepro)
  244. SRCARCH := tile
  245. endif
  246. ifeq ($(ARCH),tilegx)
  247. SRCARCH := tile
  248. endif
  249. # Where to locate arch specific headers
  250. hdr-arch := $(SRCARCH)
  251. KCONFIG_CONFIG ?= .config
  252. export KCONFIG_CONFIG
  253. # SHELL used by kbuild
  254. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  255. else if [ -x /bin/bash ]; then echo /bin/bash; \
  256. else echo sh; fi ; fi)
  257. HOSTCC = gcc
  258. HOSTCXX = g++
  259. HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
  260. HOSTCFLAGS = -W -Wno-unused-parameter -Wno-missing-field-initializers -fno-delete-null-pointer-checks
  261. HOSTCFLAGS += $(call cc-option, -Wno-empty-body)
  262. HOSTCXXFLAGS = -O2 -Wall -W -Wno-array-bounds
  263. ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
  264. HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
  265. -Wno-missing-field-initializers -fno-delete-null-pointer-checks
  266. endif
  267. # Decide whether to build built-in, modular, or both.
  268. # Normally, just do built-in.
  269. KBUILD_MODULES :=
  270. KBUILD_BUILTIN := 1
  271. # If we have only "make modules", don't compile built-in objects.
  272. # When we're building modules with modversions, we need to consider
  273. # the built-in objects during the descend as well, in order to
  274. # make sure the checksums are up to date before we record them.
  275. ifeq ($(MAKECMDGOALS),modules)
  276. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  277. endif
  278. # If we have "make <whatever> modules", compile modules
  279. # in addition to whatever we do anyway.
  280. # Just "make" or "make all" shall build modules as well
  281. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  282. KBUILD_MODULES := 1
  283. endif
  284. ifeq ($(MAKECMDGOALS),)
  285. KBUILD_MODULES := 1
  286. endif
  287. export KBUILD_MODULES KBUILD_BUILTIN
  288. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  289. # We need some generic definitions (do not try to remake the file).
  290. scripts/Kbuild.include: ;
  291. include scripts/Kbuild.include
  292. # Make variables (CC, etc...)
  293. AS = $(CROSS_COMPILE)as
  294. LD = $(CROSS_COMPILE)ld
  295. CC = $(CROSS_COMPILE)gcc
  296. CPP = $(CC) -E
  297. AR = $(CROSS_COMPILE)ar
  298. NM = $(CROSS_COMPILE)nm
  299. STRIP = $(CROSS_COMPILE)strip
  300. OBJCOPY = $(CROSS_COMPILE)objcopy
  301. OBJDUMP = $(CROSS_COMPILE)objdump
  302. AWK = awk
  303. GENKSYMS = scripts/genksyms/genksyms
  304. INSTALLKERNEL := installkernel
  305. DEPMOD = /sbin/depmod
  306. PERL = perl
  307. PYTHON = python
  308. CHECK = sparse
  309. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
  310. -Wbitwise -Wno-return-void $(CF)
  311. CFLAGS_MODULE =
  312. AFLAGS_MODULE =
  313. LDFLAGS_MODULE =
  314. CFLAGS_KERNEL =
  315. AFLAGS_KERNEL =
  316. CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im
  317. # Use USERINCLUDE when you must reference the UAPI directories only.
  318. USERINCLUDE := \
  319. -I$(srctree)/arch/$(hdr-arch)/include/uapi \
  320. -Iarch/$(hdr-arch)/include/generated/uapi \
  321. -I$(srctree)/include/uapi \
  322. -Iinclude/generated/uapi \
  323. -include $(srctree)/include/linux/kconfig.h
  324. # Use LINUXINCLUDE when you must reference the include/ directory.
  325. # Needed to be compatible with the O= option
  326. LINUXINCLUDE := \
  327. -I$(srctree)/arch/$(hdr-arch)/include \
  328. -Iarch/$(hdr-arch)/include/generated/uapi \
  329. -Iarch/$(hdr-arch)/include/generated \
  330. $(if $(KBUILD_SRC), -I$(srctree)/include) \
  331. -Iinclude \
  332. $(USERINCLUDE)
  333. KBUILD_CPPFLAGS := -D__KERNEL__
  334. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  335. -fno-strict-aliasing -fno-common \
  336. -Werror-implicit-function-declaration \
  337. -Wno-format-security \
  338. -std=gnu89 $(call cc-option,-fno-PIE)
  339. KBUILD_AFLAGS_KERNEL :=
  340. KBUILD_CFLAGS_KERNEL :=
  341. KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
  342. KBUILD_AFLAGS_MODULE := -DMODULE
  343. KBUILD_CFLAGS_MODULE := -DMODULE
  344. KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
  345. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  346. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  347. KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
  348. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  349. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  350. export CPP AR NM STRIP OBJCOPY OBJDUMP
  351. export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
  352. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  353. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  354. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KASAN
  355. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  356. export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
  357. export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
  358. export KBUILD_ARFLAGS
  359. # When compiling out-of-tree modules, put MODVERDIR in the module
  360. # tree rather than in the kernel tree. The kernel tree might
  361. # even be read-only.
  362. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  363. # Files to ignore in find ... statements
  364. export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
  365. -name CVS -o -name .pc -o -name .hg -o -name .git \) \
  366. -prune -o
  367. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
  368. --exclude CVS --exclude .pc --exclude .hg --exclude .git
  369. # ===========================================================================
  370. # Rules shared between *config targets and build targets
  371. # Basic helpers built in scripts/
  372. PHONY += scripts_basic gcc-plugins
  373. scripts_basic: gcc-plugins
  374. $(Q)$(MAKE) $(build)=scripts/basic
  375. $(Q)rm -f .tmp_quiet_recordmcount
  376. # To avoid any implicit rule to kick in, define an empty command.
  377. scripts/basic/%: scripts_basic ;
  378. PHONY += outputmakefile
  379. # outputmakefile generates a Makefile in the output directory, if using a
  380. # separate output directory. This allows convenient use of make in the
  381. # output directory.
  382. outputmakefile:
  383. ifneq ($(KBUILD_SRC),)
  384. $(Q)ln -fsn $(srctree) source
  385. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  386. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  387. endif
  388. # Support for using generic headers in asm-generic
  389. PHONY += asm-generic
  390. asm-generic:
  391. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
  392. src=asm obj=arch/$(SRCARCH)/include/generated/asm
  393. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
  394. src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
  395. # To make sure we do not include .config for any of the *config targets
  396. # catch them early, and hand them over to scripts/kconfig/Makefile
  397. # It is allowed to specify more targets when calling make, including
  398. # mixing *config targets and build targets.
  399. # For example 'make oldconfig all'.
  400. # Detect when mixed targets is specified, and make a second invocation
  401. # of make so .config is not included in this case either (for *config).
  402. version_h := include/generated/uapi/linux/version.h
  403. old_version_h := include/linux/version.h
  404. no-dot-config-targets := clean mrproper distclean \
  405. cscope gtags TAGS tags help% %docs check% coccicheck \
  406. $(version_h) headers_% archheaders archscripts \
  407. kernelversion %src-pkg
  408. config-targets := 0
  409. mixed-targets := 0
  410. dot-config := 1
  411. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  412. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  413. dot-config := 0
  414. endif
  415. endif
  416. ifeq ($(KBUILD_EXTMOD),)
  417. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  418. config-targets := 1
  419. ifneq ($(words $(MAKECMDGOALS)),1)
  420. mixed-targets := 1
  421. endif
  422. endif
  423. endif
  424. # install and module_install need also be processed one by one
  425. ifneq ($(filter install,$(MAKECMDGOALS)),)
  426. ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
  427. mixed-targets := 1
  428. endif
  429. endif
  430. ifeq ($(mixed-targets),1)
  431. # ===========================================================================
  432. # We're called with mixed targets (*config and build targets).
  433. # Handle them one by one.
  434. PHONY += $(MAKECMDGOALS) __build_one_by_one
  435. $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
  436. @:
  437. __build_one_by_one:
  438. $(Q)set -e; \
  439. for i in $(MAKECMDGOALS); do \
  440. $(MAKE) -f $(srctree)/Makefile $$i; \
  441. done
  442. else
  443. ifeq ($(config-targets),1)
  444. # ===========================================================================
  445. # *config targets only - make sure prerequisites are updated, and descend
  446. # in scripts/kconfig to make the *config target
  447. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  448. # KBUILD_DEFCONFIG may point out an alternative default configuration
  449. # used for 'make defconfig'
  450. include arch/$(SRCARCH)/Makefile
  451. export KBUILD_DEFCONFIG KBUILD_KCONFIG
  452. config: scripts_basic outputmakefile FORCE
  453. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  454. %config: scripts_basic outputmakefile FORCE
  455. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  456. else
  457. # ===========================================================================
  458. # Build targets only - this includes vmlinux, arch specific targets, clean
  459. # targets and others. In general all targets except *config targets.
  460. ifeq ($(KBUILD_EXTMOD),)
  461. # Additional helpers built in scripts/
  462. # Carefully list dependencies so we do not try to build scripts twice
  463. # in parallel
  464. PHONY += scripts
  465. scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
  466. asm-generic
  467. $(Q)$(MAKE) $(build)=$(@)
  468. # Objects we will link into vmlinux / subdirs we need to visit
  469. init-y := init/
  470. drivers-y := drivers/ sound/ firmware/
  471. net-y := net/
  472. libs-y := lib/
  473. core-y := usr/
  474. virt-y := virt/
  475. endif # KBUILD_EXTMOD
  476. ifeq ($(dot-config),1)
  477. # Read in config
  478. -include include/config/auto.conf
  479. ifeq ($(KBUILD_EXTMOD),)
  480. # Read in dependencies to all Kconfig* files, make sure to run
  481. # oldconfig if changes are detected.
  482. -include include/config/auto.conf.cmd
  483. # To avoid any implicit rule to kick in, define an empty command
  484. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  485. # If .config is newer than include/config/auto.conf, someone tinkered
  486. # with it and forgot to run make oldconfig.
  487. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  488. # we execute the config step to be sure to catch updated Kconfig files
  489. include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  490. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  491. else
  492. # external modules needs include/generated/autoconf.h and include/config/auto.conf
  493. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  494. PHONY += include/config/auto.conf
  495. include/config/auto.conf:
  496. $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
  497. echo >&2; \
  498. echo >&2 " ERROR: Kernel configuration is invalid."; \
  499. echo >&2 " include/generated/autoconf.h or $@ are missing.";\
  500. echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  501. echo >&2 ; \
  502. /bin/false)
  503. endif # KBUILD_EXTMOD
  504. else
  505. # Dummy target needed, because used as prerequisite
  506. include/config/auto.conf: ;
  507. endif # $(dot-config)
  508. # The all: target is the default when no target is given on the
  509. # command line.
  510. # This allow a user to issue only 'make' to build a kernel including modules
  511. # Defaults to vmlinux, but the arch makefile usually adds further targets
  512. all: vmlinux
  513. # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
  514. # values of the respective KBUILD_* variables
  515. ARCH_CPPFLAGS :=
  516. ARCH_AFLAGS :=
  517. ARCH_CFLAGS :=
  518. include arch/$(SRCARCH)/Makefile
  519. KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
  520. KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
  521. KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
  522. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  523. KBUILD_CFLAGS += -Os
  524. else
  525. ifdef CONFIG_PROFILE_ALL_BRANCHES
  526. KBUILD_CFLAGS += -O2
  527. else
  528. KBUILD_CFLAGS += -O2
  529. endif
  530. endif
  531. # Tell gcc to never replace conditional load with a non-conditional one
  532. KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
  533. include scripts/Makefile.gcc-plugins
  534. ifdef CONFIG_READABLE_ASM
  535. # Disable optimizations that make assembler listings hard to read.
  536. # reorder blocks reorders the control in the function
  537. # ipa clone creates specialized cloned functions
  538. # partial inlining inlines only parts of functions
  539. KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
  540. $(call cc-option,-fno-ipa-cp-clone,) \
  541. $(call cc-option,-fno-partial-inlining)
  542. endif
  543. ifneq ($(CONFIG_FRAME_WARN),0)
  544. KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  545. endif
  546. # Handle stack protector mode.
  547. #
  548. # Since kbuild can potentially perform two passes (first with the old
  549. # .config values and then with updated .config values), we cannot error out
  550. # if a desired compiler option is unsupported. If we were to error, kbuild
  551. # could never get to the second pass and actually notice that we changed
  552. # the option to something that was supported.
  553. #
  554. # Additionally, we don't want to fallback and/or silently change which compiler
  555. # flags will be used, since that leads to producing kernels with different
  556. # security feature characteristics depending on the compiler used. ("But I
  557. # selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
  558. #
  559. # The middle ground is to warn here so that the failed option is obvious, but
  560. # to let the build fail with bad compiler flags so that we can't produce a
  561. # kernel when there is a CONFIG and compiler mismatch.
  562. #
  563. ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
  564. stackp-flag := -fstack-protector
  565. ifeq ($(call cc-option, $(stackp-flag)),)
  566. $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
  567. -fstack-protector not supported by compiler)
  568. endif
  569. else
  570. ifdef CONFIG_CC_STACKPROTECTOR_STRONG
  571. stackp-flag := -fstack-protector-strong
  572. ifeq ($(call cc-option, $(stackp-flag)),)
  573. $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
  574. -fstack-protector-strong not supported by compiler)
  575. endif
  576. else
  577. # Force off for distro compilers that enable stack protector by default.
  578. stackp-flag := $(call cc-option, -fno-stack-protector)
  579. endif
  580. endif
  581. KBUILD_CFLAGS += $(stackp-flag)
  582. ifeq ($(cc-name),clang)
  583. KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
  584. KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
  585. KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
  586. KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
  587. KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
  588. # Quiet clang warning: comparison of unsigned expression < 0 is always false
  589. KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
  590. # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
  591. # source of a reference will be _MergedGlobals and not on of the whitelisted names.
  592. # See modpost pattern 2
  593. KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
  594. KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
  595. else
  596. # These warnings generated too much noise in a regular build.
  597. # Use make W=1 to enable them (see scripts/Makefile.build)
  598. KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
  599. KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
  600. endif
  601. ifdef CONFIG_FRAME_POINTER
  602. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  603. else
  604. # Some targets (ARM with Thumb2, for example), can't be built with frame
  605. # pointers. For those, we don't have FUNCTION_TRACER automatically
  606. # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
  607. # incompatible with -fomit-frame-pointer with current GCC, so we don't use
  608. # -fomit-frame-pointer with FUNCTION_TRACER.
  609. ifndef CONFIG_FUNCTION_TRACER
  610. KBUILD_CFLAGS += -fomit-frame-pointer
  611. endif
  612. endif
  613. KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
  614. ifdef CONFIG_DEBUG_INFO
  615. ifdef CONFIG_DEBUG_INFO_SPLIT
  616. KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
  617. else
  618. KBUILD_CFLAGS += -g
  619. endif
  620. KBUILD_AFLAGS += -Wa,--gdwarf-2
  621. endif
  622. ifdef CONFIG_DEBUG_INFO_DWARF4
  623. KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
  624. endif
  625. ifdef CONFIG_DEBUG_INFO_REDUCED
  626. KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
  627. $(call cc-option,-fno-var-tracking)
  628. endif
  629. ifdef CONFIG_FUNCTION_TRACER
  630. ifndef CC_FLAGS_FTRACE
  631. CC_FLAGS_FTRACE := -pg
  632. endif
  633. export CC_FLAGS_FTRACE
  634. ifdef CONFIG_HAVE_FENTRY
  635. CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
  636. endif
  637. KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
  638. KBUILD_AFLAGS += $(CC_USING_FENTRY)
  639. ifdef CONFIG_DYNAMIC_FTRACE
  640. ifdef CONFIG_HAVE_C_RECORDMCOUNT
  641. BUILD_C_RECORDMCOUNT := y
  642. export BUILD_C_RECORDMCOUNT
  643. endif
  644. endif
  645. endif
  646. # We trigger additional mismatches with less inlining
  647. ifdef CONFIG_DEBUG_SECTION_MISMATCH
  648. KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  649. endif
  650. # arch Makefile may override CC so keep this after arch Makefile is included
  651. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  652. CHECKFLAGS += $(NOSTDINC_FLAGS)
  653. # warn about C99 declaration after statement
  654. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  655. # disable pointer signed / unsigned warnings in gcc 4.0
  656. KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
  657. # disable invalid "can't wrap" optimizations for signed / pointers
  658. KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
  659. # conserve stack if available
  660. KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
  661. # disallow errors like 'EXPORT_GPL(foo);' with missing header
  662. KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
  663. # require functions to have arguments in prototypes, not empty 'int foo()'
  664. KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
  665. # Prohibit date/time macros, which would make the build non-deterministic
  666. KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
  667. # use the deterministic mode of AR if available
  668. KBUILD_ARFLAGS := $(call ar-option,D)
  669. # check for 'asm goto'
  670. ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
  671. KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
  672. KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
  673. endif
  674. include scripts/Makefile.kasan
  675. include scripts/Makefile.extrawarn
  676. # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
  677. # last assignments
  678. KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
  679. KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
  680. KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
  681. # Use --build-id when available.
  682. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  683. $(call cc-ldoption, -Wl$(comma)--build-id,))
  684. KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  685. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  686. ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
  687. LDFLAGS_vmlinux += $(call ld-option, -X,)
  688. endif
  689. # Default kernel image to build when no specific target is given.
  690. # KBUILD_IMAGE may be overruled on the command line or
  691. # set in the environment
  692. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  693. # this default value
  694. export KBUILD_IMAGE ?= vmlinux
  695. #
  696. # INSTALL_PATH specifies where to place the updated kernel and system map
  697. # images. Default is /boot, but you can set it to other values
  698. export INSTALL_PATH ?= /boot
  699. #
  700. # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
  701. # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
  702. # an argument if needed. Otherwise it defaults to the kernel install path
  703. #
  704. export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
  705. #
  706. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  707. # relocations required by build roots. This is not defined in the
  708. # makefile but the argument can be passed to make if needed.
  709. #
  710. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  711. export MODLIB
  712. #
  713. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  714. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  715. # the default option --strip-debug will be used. Otherwise,
  716. # INSTALL_MOD_STRIP value will be used as the options to the strip command.
  717. ifdef INSTALL_MOD_STRIP
  718. ifeq ($(INSTALL_MOD_STRIP),1)
  719. mod_strip_cmd = $(STRIP) --strip-debug
  720. else
  721. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  722. endif # INSTALL_MOD_STRIP=1
  723. else
  724. mod_strip_cmd = true
  725. endif # INSTALL_MOD_STRIP
  726. export mod_strip_cmd
  727. # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
  728. # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
  729. # or CONFIG_MODULE_COMPRESS_XZ.
  730. mod_compress_cmd = true
  731. ifdef CONFIG_MODULE_COMPRESS
  732. ifdef CONFIG_MODULE_COMPRESS_GZIP
  733. mod_compress_cmd = gzip -n -f
  734. endif # CONFIG_MODULE_COMPRESS_GZIP
  735. ifdef CONFIG_MODULE_COMPRESS_XZ
  736. mod_compress_cmd = xz -f
  737. endif # CONFIG_MODULE_COMPRESS_XZ
  738. endif # CONFIG_MODULE_COMPRESS
  739. export mod_compress_cmd
  740. # Select initial ramdisk compression format, default is gzip(1).
  741. # This shall be used by the dracut(8) tool while creating an initramfs image.
  742. #
  743. INITRD_COMPRESS-y := gzip
  744. INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
  745. INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
  746. INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
  747. INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
  748. INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
  749. # do not export INITRD_COMPRESS, since we didn't actually
  750. # choose a sane default compression above.
  751. # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
  752. ifdef CONFIG_MODULE_SIG_ALL
  753. $(eval $(call config_filename,MODULE_SIG_KEY))
  754. mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
  755. else
  756. mod_sign_cmd = true
  757. endif
  758. export mod_sign_cmd
  759. ifeq ($(KBUILD_EXTMOD),)
  760. core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ grsecurity/
  761. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  762. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  763. $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
  764. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  765. $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
  766. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  767. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  768. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  769. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  770. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  771. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  772. libs-y := $(libs-y1) $(libs-y2)
  773. virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
  774. # Externally visible symbols (used by link-vmlinux.sh)
  775. export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
  776. export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
  777. export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
  778. export LDFLAGS_vmlinux
  779. # used by scripts/pacmage/Makefile
  780. export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
  781. vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
  782. # Final link of vmlinux
  783. cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
  784. quiet_cmd_link-vmlinux = LINK $@
  785. # Include targets which we want to
  786. # execute if the rest of the kernel build went well.
  787. vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
  788. ifdef CONFIG_HEADERS_CHECK
  789. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  790. endif
  791. ifdef CONFIG_SAMPLES
  792. $(Q)$(MAKE) $(build)=samples
  793. endif
  794. ifdef CONFIG_BUILD_DOCSRC
  795. $(Q)$(MAKE) $(build)=Documentation
  796. endif
  797. ifdef CONFIG_GDB_SCRIPTS
  798. $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
  799. endif
  800. +$(call if_changed,link-vmlinux)
  801. # The actual objects are generated when descending,
  802. # make sure no implicit rule kicks in
  803. $(filter-out $(init-y),$(vmlinux-deps)): KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  804. $(filter-out $(init-y),$(vmlinux-deps)): KBUILD_AFLAGS += $(GCC_PLUGINS_AFLAGS)
  805. $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
  806. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  807. # Preset locale variables to speed up the build process. Limit locale
  808. # tweaks to this spot to avoid wrong language settings when running
  809. # make menuconfig etc.
  810. # Error messages still appears in the original language
  811. PHONY += $(vmlinux-dirs)
  812. $(vmlinux-dirs): gcc-plugins prepare scripts
  813. $(Q)$(MAKE) $(build)=$@
  814. define filechk_kernel.release
  815. echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
  816. endef
  817. # Store (new) KERNELRELEASE string in include/config/kernel.release
  818. include/config/kernel.release: include/config/auto.conf FORCE
  819. $(call filechk,kernel.release)
  820. # Things we need to do before we recursively start building the kernel
  821. # or the modules are listed in "prepare".
  822. # A multi level approach is used. prepareN is processed before prepareN-1.
  823. # archprepare is used in arch Makefiles and when processed asm symlink,
  824. # version.h and scripts_basic is processed / created.
  825. # Listed in dependency order
  826. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  827. # prepare3 is used to check if we are building in a separate output directory,
  828. # and if so do:
  829. # 1) Check that make has not been executed in the kernel src $(srctree)
  830. prepare3: include/config/kernel.release
  831. ifneq ($(KBUILD_SRC),)
  832. @$(kecho) ' Using $(srctree) as source for kernel'
  833. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  834. echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
  835. echo >&2 " in the '$(srctree)' directory.";\
  836. /bin/false; \
  837. fi;
  838. endif
  839. # prepare2 creates a makefile if using a separate output directory
  840. prepare2: prepare3 outputmakefile asm-generic
  841. prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
  842. include/config/auto.conf
  843. $(cmd_crmodverdir)
  844. archprepare: archheaders archscripts prepare1 scripts_basic
  845. prepare0: KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  846. prepare0: KBUILD_AFLAGS += $(GCC_PLUGINS_AFLAGS)
  847. prepare0: archprepare FORCE
  848. $(Q)$(MAKE) $(build)=.
  849. # All the preparing..
  850. prepare: KBUILD_CFLAGS := $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS))
  851. prepare: prepare0
  852. # Generate some files
  853. # ---------------------------------------------------------------------------
  854. # KERNELRELEASE can change from a few different places, meaning version.h
  855. # needs to be updated, so this check is forced on all builds
  856. uts_len := 64
  857. define filechk_utsrelease.h
  858. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  859. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  860. exit 1; \
  861. fi; \
  862. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  863. endef
  864. define filechk_version.h
  865. (echo \#define LINUX_VERSION_CODE $(shell \
  866. expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
  867. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  868. endef
  869. $(version_h): $(srctree)/Makefile FORCE
  870. $(call filechk,version.h)
  871. $(Q)rm -f $(old_version_h)
  872. include/generated/utsrelease.h: include/config/kernel.release FORCE
  873. $(call filechk,utsrelease.h)
  874. PHONY += headerdep
  875. headerdep:
  876. $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
  877. $(srctree)/scripts/headerdep.pl -I$(srctree)/include
  878. # ---------------------------------------------------------------------------
  879. # Firmware install
  880. INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
  881. export INSTALL_FW_PATH
  882. PHONY += firmware_install
  883. firmware_install: FORCE
  884. @mkdir -p $(objtree)/firmware
  885. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
  886. # ---------------------------------------------------------------------------
  887. # Kernel headers
  888. #Default location for installed headers
  889. export INSTALL_HDR_PATH = $(objtree)/usr
  890. # If we do an all arch process set dst to asm-$(hdr-arch)
  891. hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
  892. PHONY += archheaders
  893. archheaders:
  894. PHONY += archscripts
  895. archscripts:
  896. PHONY += __headers
  897. __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
  898. $(Q)$(MAKE) $(build)=scripts build_unifdef
  899. PHONY += headers_install_all
  900. headers_install_all:
  901. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
  902. PHONY += headers_install
  903. headers_install: __headers
  904. $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
  905. $(error Headers not exportable for the $(SRCARCH) architecture))
  906. $(Q)$(MAKE) $(hdr-inst)=include/uapi
  907. $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
  908. PHONY += headers_check_all
  909. headers_check_all: headers_install_all
  910. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
  911. PHONY += headers_check
  912. headers_check: headers_install
  913. $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
  914. $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
  915. # ---------------------------------------------------------------------------
  916. # Kernel selftest
  917. PHONY += kselftest
  918. kselftest:
  919. $(Q)$(MAKE) -C tools/testing/selftests run_tests
  920. kselftest-clean:
  921. $(Q)$(MAKE) -C tools/testing/selftests clean
  922. # ---------------------------------------------------------------------------
  923. # Modules
  924. ifdef CONFIG_MODULES
  925. # By default, build modules as well
  926. all: modules
  927. # Build modules
  928. #
  929. # A module can be listed more than once in obj-m resulting in
  930. # duplicate lines in modules.order files. Those are removed
  931. # using awk while concatenating to the final file.
  932. PHONY += modules
  933. modules: KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  934. modules: KBUILD_AFLAGS += $(GCC_PLUGINS_AFLAGS)
  935. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
  936. $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
  937. @$(kecho) ' Building modules, stage 2.';
  938. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  939. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
  940. modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
  941. $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
  942. %/modules.builtin: include/config/auto.conf
  943. $(Q)$(MAKE) $(modbuiltin)=$*
  944. # Target to prepare building external modules
  945. PHONY += modules_prepare
  946. modules_prepare: gcc-plugins prepare scripts
  947. # Target to install modules
  948. PHONY += modules_install
  949. modules_install: _modinst_ _modinst_post
  950. PHONY += _modinst_
  951. _modinst_:
  952. @rm -rf $(MODLIB)/kernel
  953. @rm -f $(MODLIB)/source
  954. @mkdir -p $(MODLIB)/kernel
  955. @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
  956. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  957. rm -f $(MODLIB)/build ; \
  958. ln -s $(CURDIR) $(MODLIB)/build ; \
  959. fi
  960. @cp -f $(objtree)/modules.order $(MODLIB)/
  961. @cp -f $(objtree)/modules.builtin $(MODLIB)/
  962. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  963. # This depmod is only for convenience to give the initial
  964. # boot a modules.dep even before / is mounted read-write. However the
  965. # boot script depmod is the master version.
  966. PHONY += _modinst_post
  967. _modinst_post: _modinst_
  968. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
  969. $(call cmd,depmod)
  970. ifeq ($(CONFIG_MODULE_SIG), y)
  971. PHONY += modules_sign
  972. modules_sign:
  973. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
  974. endif
  975. else # CONFIG_MODULES
  976. # Modules not configured
  977. # ---------------------------------------------------------------------------
  978. modules modules_install: FORCE
  979. @echo >&2
  980. @echo >&2 "The present kernel configuration has modules disabled."
  981. @echo >&2 "Type 'make config' and enable loadable module support."
  982. @echo >&2 "Then build a kernel with module support enabled."
  983. @echo >&2
  984. @exit 1
  985. endif # CONFIG_MODULES
  986. ###
  987. # Cleaning is done on three levels.
  988. # make clean Delete most generated files
  989. # Leave enough to build external modules
  990. # make mrproper Delete the current configuration, and all generated files
  991. # make distclean Remove editor backup files, patch leftover files and the like
  992. # Directories & files removed with 'make clean'
  993. CLEAN_DIRS += $(MODVERDIR)
  994. # Directories & files removed with 'make mrproper'
  995. MRPROPER_DIRS += include/config usr/include include/generated \
  996. arch/*/include/generated .tmp_objdiff
  997. MRPROPER_FILES += .config .config.old .version .old_version \
  998. Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
  999. signing_key.pem signing_key.priv signing_key.x509 \
  1000. x509.genkey extra_certificates signing_key.x509.keyid \
  1001. signing_key.x509.signer vmlinux-gdb.py \
  1002. tools/gcc/size_overflow_plugin/size_overflow_hash_aux.h \
  1003. tools/gcc/size_overflow_plugin/size_overflow_hash.h \
  1004. tools/gcc/size_overflow_plugin/disable_size_overflow_hash.h \
  1005. tools/gcc/randomize_layout_seed.h
  1006. # clean - Delete most, but leave enough to build external modules
  1007. #
  1008. clean: rm-dirs := $(CLEAN_DIRS)
  1009. clean: rm-files := $(CLEAN_FILES)
  1010. clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
  1011. PHONY += $(clean-dirs) clean archclean vmlinuxclean
  1012. $(clean-dirs):
  1013. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1014. vmlinuxclean:
  1015. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
  1016. clean: archclean vmlinuxclean
  1017. # mrproper - Delete all generated files, including .config
  1018. #
  1019. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  1020. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  1021. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  1022. PHONY += $(mrproper-dirs) mrproper archmrproper
  1023. $(mrproper-dirs):
  1024. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  1025. mrproper: clean archmrproper $(mrproper-dirs)
  1026. $(call cmd,rmdirs)
  1027. $(call cmd,rmfiles)
  1028. # distclean
  1029. #
  1030. PHONY += distclean
  1031. distclean: mrproper
  1032. @find $(srctree) $(RCS_FIND_IGNORE) \
  1033. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  1034. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  1035. -o -name '.*.rej' -o -name '*.so' -o -name '*%' -o -name 'core' \) \
  1036. -type f -print | xargs rm -f
  1037. # Packaging of the kernel to various formats
  1038. # ---------------------------------------------------------------------------
  1039. # rpm target kept for backward compatibility
  1040. package-dir := scripts/package
  1041. %src-pkg: FORCE
  1042. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1043. %pkg: include/config/kernel.release FORCE
  1044. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1045. rpm: include/config/kernel.release FORCE
  1046. $(Q)$(MAKE) $(build)=$(package-dir) $@
  1047. # Brief documentation of the typical targets used
  1048. # ---------------------------------------------------------------------------
  1049. boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
  1050. boards := $(sort $(notdir $(boards)))
  1051. board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  1052. board-dirs := $(sort $(notdir $(board-dirs:/=)))
  1053. help:
  1054. @echo 'Cleaning targets:'
  1055. @echo ' clean - Remove most generated files but keep the config and'
  1056. @echo ' enough build support to build external modules'
  1057. @echo ' mrproper - Remove all generated files + config + various backup files'
  1058. @echo ' distclean - mrproper + remove editor backup and patch files'
  1059. @echo ''
  1060. @echo 'Configuration targets:'
  1061. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  1062. @echo ''
  1063. @echo 'Other generic targets:'
  1064. @echo ' all - Build all targets marked with [*]'
  1065. @echo '* vmlinux - Build the bare kernel'
  1066. @echo '* modules - Build all modules'
  1067. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  1068. @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
  1069. @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
  1070. @echo ' dir/ - Build all files in dir and below'
  1071. @echo ' dir/file.[ois] - Build specified target only'
  1072. @echo ' dir/file.lst - Build specified mixed source/assembly target only'
  1073. @echo ' (requires a recent binutils and recent build (System.map))'
  1074. @echo ' dir/file.ko - Build module including final link'
  1075. @echo ' modules_prepare - Set up for building external modules'
  1076. @echo ' tags/TAGS - Generate tags file for editors'
  1077. @echo ' cscope - Generate cscope index'
  1078. @echo ' gtags - Generate GNU GLOBAL index'
  1079. @echo ' kernelrelease - Output the release version string (use with make -s)'
  1080. @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
  1081. @echo ' image_name - Output the image name (use with make -s)'
  1082. @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  1083. echo ' (default: $(INSTALL_HDR_PATH))'; \
  1084. echo ''
  1085. @echo 'Static analysers'
  1086. @echo ' checkstack - Generate a list of stack hogs'
  1087. @echo ' namespacecheck - Name space analysis on compiled kernel'
  1088. @echo ' versioncheck - Sanity check on version.h usage'
  1089. @echo ' includecheck - Check for duplicate included header files'
  1090. @echo ' export_report - List the usages of all exported symbols'
  1091. @echo ' headers_check - Sanity check on exported headers'
  1092. @echo ' headerdep - Detect inclusion cycles in headers'
  1093. @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
  1094. @echo ''
  1095. @echo 'Kernel selftest'
  1096. @echo ' kselftest - Build and run kernel selftest (run as root)'
  1097. @echo ' Build, install, and boot kernel before'
  1098. @echo ' running kselftest on it'
  1099. @echo ' kselftest-clean - Remove all generated kselftest files'
  1100. @echo ''
  1101. @echo 'Kernel packaging:'
  1102. @$(MAKE) $(build)=$(package-dir) help
  1103. @echo ''
  1104. @echo 'Documentation targets:'
  1105. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  1106. @echo ''
  1107. @echo 'Architecture specific targets ($(SRCARCH)):'
  1108. @$(if $(archhelp),$(archhelp),\
  1109. echo ' No architecture specific help defined for $(SRCARCH)')
  1110. @echo ''
  1111. @$(if $(boards), \
  1112. $(foreach b, $(boards), \
  1113. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  1114. echo '')
  1115. @$(if $(board-dirs), \
  1116. $(foreach b, $(board-dirs), \
  1117. printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
  1118. printf " %-16s - Show all of the above\\n" help-boards; \
  1119. echo '')
  1120. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1121. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  1122. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  1123. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  1124. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  1125. @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
  1126. @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
  1127. @echo ' 1: warnings which may be relevant and do not occur too often'
  1128. @echo ' 2: warnings which occur quite often but may still be relevant'
  1129. @echo ' 3: more obscure warnings, can most likely be ignored'
  1130. @echo ' Multiple levels can be combined with W=12 or W=123'
  1131. @echo ''
  1132. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  1133. @echo 'For further info see the ./README file'
  1134. help-board-dirs := $(addprefix help-,$(board-dirs))
  1135. help-boards: $(help-board-dirs)
  1136. boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
  1137. $(help-board-dirs): help-%:
  1138. @echo 'Architecture specific targets ($(SRCARCH) $*):'
  1139. @$(if $(boards-per-dir), \
  1140. $(foreach b, $(boards-per-dir), \
  1141. printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
  1142. echo '')
  1143. # Documentation targets
  1144. # ---------------------------------------------------------------------------
  1145. %docs: scripts_basic FORCE
  1146. $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
  1147. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  1148. else # KBUILD_EXTMOD
  1149. ###
  1150. # External module support.
  1151. # When building external modules the kernel used as basis is considered
  1152. # read-only, and no consistency checks are made and the make
  1153. # system is not used on the basis kernel. If updates are required
  1154. # in the basis kernel ordinary make commands (without M=...) must
  1155. # be used.
  1156. #
  1157. # The following are the only valid targets when building external
  1158. # modules.
  1159. # make M=dir clean Delete all automatically generated files
  1160. # make M=dir modules Make all modules in specified dir
  1161. # make M=dir Same as 'make M=dir modules'
  1162. # make M=dir modules_install
  1163. # Install the modules built in the module directory
  1164. # Assumes install directory is already created
  1165. # We are always building modules
  1166. KBUILD_MODULES := 1
  1167. PHONY += crmodverdir
  1168. crmodverdir:
  1169. $(cmd_crmodverdir)
  1170. PHONY += $(objtree)/Module.symvers
  1171. $(objtree)/Module.symvers:
  1172. @test -e $(objtree)/Module.symvers || ( \
  1173. echo; \
  1174. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1175. echo " is missing; modules will have no dependencies and modversions."; \
  1176. echo )
  1177. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1178. PHONY += $(module-dirs) modules
  1179. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1180. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1181. modules: KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  1182. modules: KBUILD_AFLAGS += $(GCC_PLUGINS_AFLAGS)
  1183. modules: $(module-dirs)
  1184. @$(kecho) ' Building modules, stage 2.';
  1185. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1186. PHONY += modules_install
  1187. modules_install: _emodinst_ _emodinst_post
  1188. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1189. PHONY += _emodinst_
  1190. _emodinst_:
  1191. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1192. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1193. PHONY += _emodinst_post
  1194. _emodinst_post: _emodinst_
  1195. $(call cmd,depmod)
  1196. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1197. PHONY += $(clean-dirs) clean
  1198. $(clean-dirs):
  1199. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1200. clean: rm-dirs := $(MODVERDIR)
  1201. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1202. help:
  1203. @echo ' Building external modules.'
  1204. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1205. @echo ''
  1206. @echo ' modules - default target, build the module(s)'
  1207. @echo ' modules_install - install the module'
  1208. @echo ' clean - remove generated files in module directory only'
  1209. @echo ''
  1210. # Dummies...
  1211. PHONY += prepare scripts
  1212. prepare: ;
  1213. scripts: ;
  1214. endif # KBUILD_EXTMOD
  1215. clean: $(clean-dirs)
  1216. $(call cmd,rmdirs)
  1217. $(call cmd,rmfiles)
  1218. @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
  1219. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1220. -o -name '*.ko.*' \
  1221. -o -name '*.dwo' \
  1222. -o -name '*.su' \
  1223. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  1224. -o -name '*.symtypes' -o -name 'modules.order' \
  1225. -o -name modules.builtin -o -name '.tmp_*.o.*' \
  1226. -o -name '*.gcno' \) -type f -print | xargs rm -f
  1227. # Generate tags for editors
  1228. # ---------------------------------------------------------------------------
  1229. quiet_cmd_tags = GEN $@
  1230. cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
  1231. tags TAGS cscope gtags: FORCE
  1232. $(call cmd,tags)
  1233. # Scripts to check various things for consistency
  1234. # ---------------------------------------------------------------------------
  1235. PHONY += includecheck versioncheck coccicheck namespacecheck export_report
  1236. includecheck:
  1237. find $(srctree)/* $(RCS_FIND_IGNORE) \
  1238. -name '*.[hcS]' -type f -print | sort \
  1239. | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
  1240. versioncheck:
  1241. find $(srctree)/* $(RCS_FIND_IGNORE) \
  1242. -name '*.[hcS]' -type f -print | sort \
  1243. | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
  1244. coccicheck:
  1245. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
  1246. namespacecheck:
  1247. $(PERL) $(srctree)/scripts/namespace.pl
  1248. export_report:
  1249. $(PERL) $(srctree)/scripts/export_report.pl
  1250. endif #ifeq ($(config-targets),1)
  1251. endif #ifeq ($(mixed-targets),1)
  1252. PHONY += checkstack kernelrelease kernelversion image_name
  1253. # UML needs a little special treatment here. It wants to use the host
  1254. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1255. # else wants $(ARCH), including people doing cross-builds, which means
  1256. # that $(SUBARCH) doesn't work here.
  1257. ifeq ($(ARCH), um)
  1258. CHECKSTACK_ARCH := $(SUBARCH)
  1259. else
  1260. CHECKSTACK_ARCH := $(ARCH)
  1261. endif
  1262. checkstack:
  1263. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1264. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1265. kernelrelease:
  1266. @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
  1267. kernelversion:
  1268. @echo $(KERNELVERSION)
  1269. image_name:
  1270. @echo $(KBUILD_IMAGE)
  1271. # Clear a bunch of variables before executing the submake
  1272. tools/: FORCE
  1273. $(Q)mkdir -p $(objtree)/tools
  1274. $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
  1275. tools/%: FORCE
  1276. $(Q)mkdir -p $(objtree)/tools
  1277. $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
  1278. # Single targets
  1279. # ---------------------------------------------------------------------------
  1280. # Single targets are compatible with:
  1281. # - build with mixed source and output
  1282. # - build with separate output dir 'make O=...'
  1283. # - external modules
  1284. #
  1285. # target-dir => where to store outputfile
  1286. # build-dir => directory in kernel source tree to use
  1287. ifeq ($(KBUILD_EXTMOD),)
  1288. build-dir = $(patsubst %/,%,$(dir $@))
  1289. target-dir = $(dir $@)
  1290. else
  1291. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1292. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1293. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1294. endif
  1295. %.s: KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  1296. %.s: KBUILD_AFLAGS += $(GCC_PLUGINS_AFLAGS)
  1297. %.s: %.c gcc-plugins prepare scripts FORCE
  1298. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1299. %.i: %.c prepare scripts FORCE
  1300. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1301. %.o: KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  1302. %.o: KBUILD_AFLAGS += $(GCC_PLUGINS_AFLAGS)
  1303. %.o: %.c gcc-plugins prepare scripts FORCE
  1304. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1305. %.lst: %.c prepare scripts FORCE
  1306. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1307. %.s: %.S gcc-plugins prepare scripts FORCE
  1308. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1309. %.o: %.S gcc-plugins prepare scripts FORCE
  1310. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1311. %.symtypes: %.c prepare scripts FORCE
  1312. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1313. # Modules
  1314. /: prepare scripts FORCE
  1315. $(cmd_crmodverdir)
  1316. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1317. $(build)=$(build-dir)
  1318. # Make sure the latest headers are built for Documentation
  1319. Documentation/: headers_install
  1320. %/: KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  1321. %/: KBUILD_AFLAGS += $(GCC_PLUGINS_AFLAGS)
  1322. %/: gcc-plugins prepare scripts FORCE
  1323. $(cmd_crmodverdir)
  1324. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1325. $(build)=$(build-dir)
  1326. %.ko: KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
  1327. %.ko: KBUILD_AFLAGS += $(GCC_PLUGINS_AFLAGS)
  1328. %.ko: gcc-plugins prepare scripts FORCE
  1329. $(cmd_crmodverdir)
  1330. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1331. $(build)=$(build-dir) $(@:.ko=.o)
  1332. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1333. # FIXME Should go into a make.lib or something
  1334. # ===========================================================================
  1335. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1336. cmd_rmdirs = rm -rf $(rm-dirs)
  1337. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1338. cmd_rmfiles = rm -f $(rm-files)
  1339. # Run depmod only if we have System.map and depmod is executable
  1340. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1341. cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
  1342. $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
  1343. # Create temporary dir for module support files
  1344. # clean it up only when building all modules
  1345. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1346. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1347. # read all saved command lines
  1348. targets := $(wildcard $(sort $(targets)))
  1349. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1350. ifneq ($(cmd_files),)
  1351. $(cmd_files): ; # Do not try to update included dependency files
  1352. include $(cmd_files)
  1353. endif
  1354. endif # skip-makefile
  1355. PHONY += FORCE
  1356. FORCE:
  1357. # Declare the contents of the .PHONY variable as phony. We keep that
  1358. # information in a variable so we can use it in if_changed and friends.
  1359. .PHONY: $(PHONY)