Makefile 51 KB

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  1. VERSION = 2
  2. PATCHLEVEL = 6
  3. SUBLEVEL = 39
  4. EXTRAVERSION = -rc1
  5. NAME = Flesh-Eating Bats with Fangs
  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 := 1
  92. endif
  93. # That's our default target when none is given on the command line
  94. PHONY := _all
  95. _all:
  96. # Cancel implicit rules on top Makefile
  97. $(CURDIR)/Makefile Makefile: ;
  98. ifneq ($(KBUILD_OUTPUT),)
  99. # Invoke a second make in the output directory, passing relevant variables
  100. # check that the output directory actually exists
  101. saved-output := $(KBUILD_OUTPUT)
  102. KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  103. $(if $(KBUILD_OUTPUT),, \
  104. $(error output directory "$(saved-output)" does not exist))
  105. PHONY += $(MAKECMDGOALS) sub-make
  106. $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
  107. $(Q)@:
  108. sub-make: FORCE
  109. $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  110. KBUILD_SRC=$(CURDIR) \
  111. KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
  112. $(filter-out _all sub-make,$(MAKECMDGOALS))
  113. # Leave processing to above invocation of make
  114. skip-makefile := 1
  115. endif # ifneq ($(KBUILD_OUTPUT),)
  116. endif # ifeq ($(KBUILD_SRC),)
  117. # We process the rest of the Makefile if this is the final invocation of make
  118. ifeq ($(skip-makefile),)
  119. # If building an external module we do not care about the all: rule
  120. # but instead _all depend on modules
  121. PHONY += all
  122. ifeq ($(KBUILD_EXTMOD),)
  123. _all: all
  124. else
  125. _all: modules
  126. endif
  127. srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  128. 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/ )
  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. # Where to locate arch specific headers
  187. hdr-arch := $(SRCARCH)
  188. ifeq ($(ARCH),m68knommu)
  189. hdr-arch := m68k
  190. endif
  191. KCONFIG_CONFIG ?= .config
  192. export KCONFIG_CONFIG
  193. # SHELL used by kbuild
  194. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  195. else if [ -x /bin/bash ]; then echo /bin/bash; \
  196. else echo sh; fi ; fi)
  197. HOSTCC = gcc
  198. HOSTCXX = g++
  199. HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
  200. HOSTCXXFLAGS = -O2
  201. # Decide whether to build built-in, modular, or both.
  202. # Normally, just do built-in.
  203. KBUILD_MODULES :=
  204. KBUILD_BUILTIN := 1
  205. # If we have only "make modules", don't compile built-in objects.
  206. # When we're building modules with modversions, we need to consider
  207. # the built-in objects during the descend as well, in order to
  208. # make sure the checksums are up to date before we record them.
  209. ifeq ($(MAKECMDGOALS),modules)
  210. KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  211. endif
  212. # If we have "make <whatever> modules", compile modules
  213. # in addition to whatever we do anyway.
  214. # Just "make" or "make all" shall build modules as well
  215. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  216. KBUILD_MODULES := 1
  217. endif
  218. ifeq ($(MAKECMDGOALS),)
  219. KBUILD_MODULES := 1
  220. endif
  221. export KBUILD_MODULES KBUILD_BUILTIN
  222. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  223. # Beautify output
  224. # ---------------------------------------------------------------------------
  225. #
  226. # Normally, we echo the whole command before executing it. By making
  227. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  228. # $(quiet) to choose other forms of output instead, e.g.
  229. #
  230. # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  231. # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
  232. #
  233. # If $(quiet) is empty, the whole command will be printed.
  234. # If it is set to "quiet_", only the short version will be printed.
  235. # If it is set to "silent_", nothing will be printed at all, since
  236. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  237. #
  238. # A simple variant is to prefix commands with $(Q) - that's useful
  239. # for commands that shall be hidden in non-verbose mode.
  240. #
  241. # $(Q)ln $@ :<
  242. #
  243. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  244. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  245. ifeq ($(KBUILD_VERBOSE),1)
  246. quiet =
  247. Q =
  248. else
  249. quiet=quiet_
  250. Q = @
  251. endif
  252. # If the user is running make -s (silent mode), suppress echoing of
  253. # commands
  254. ifneq ($(findstring s,$(MAKEFLAGS)),)
  255. quiet=silent_
  256. endif
  257. export quiet Q KBUILD_VERBOSE
  258. # Look for make include files relative to root of kernel src
  259. MAKEFLAGS += --include-dir=$(srctree)
  260. # We need some generic definitions (do not try to remake the file).
  261. $(srctree)/scripts/Kbuild.include: ;
  262. include $(srctree)/scripts/Kbuild.include
  263. # Make variables (CC, etc...)
  264. AS = $(CROSS_COMPILE)as
  265. LD = $(CROSS_COMPILE)ld
  266. CC = $(CROSS_COMPILE)gcc
  267. CPP = $(CC) -E
  268. AR = $(CROSS_COMPILE)ar
  269. NM = $(CROSS_COMPILE)nm
  270. STRIP = $(CROSS_COMPILE)strip
  271. OBJCOPY = $(CROSS_COMPILE)objcopy
  272. OBJDUMP = $(CROSS_COMPILE)objdump
  273. AWK = awk
  274. GENKSYMS = scripts/genksyms/genksyms
  275. INSTALLKERNEL := installkernel
  276. DEPMOD = /sbin/depmod
  277. KALLSYMS = scripts/kallsyms
  278. PERL = perl
  279. CHECK = sparse
  280. CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
  281. -Wbitwise -Wno-return-void $(CF)
  282. CFLAGS_MODULE =
  283. AFLAGS_MODULE =
  284. LDFLAGS_MODULE =
  285. CFLAGS_KERNEL =
  286. AFLAGS_KERNEL =
  287. CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
  288. # Use LINUXINCLUDE when you must reference the include/ directory.
  289. # Needed to be compatible with the O= option
  290. LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
  291. $(if $(KBUILD_SRC), -I$(srctree)/include) \
  292. -include include/generated/autoconf.h
  293. KBUILD_CPPFLAGS := -D__KERNEL__
  294. KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  295. -fno-strict-aliasing -fno-common \
  296. -Werror-implicit-function-declaration \
  297. -Wno-format-security \
  298. -fno-delete-null-pointer-checks
  299. KBUILD_AFLAGS_KERNEL :=
  300. KBUILD_CFLAGS_KERNEL :=
  301. KBUILD_AFLAGS := -D__ASSEMBLY__
  302. KBUILD_AFLAGS_MODULE := -DMODULE
  303. KBUILD_CFLAGS_MODULE := -DMODULE
  304. KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
  305. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  306. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  307. KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
  308. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  309. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  310. export CPP AR NM STRIP OBJCOPY OBJDUMP
  311. export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
  312. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  313. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  314. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
  315. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  316. export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
  317. export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
  318. # When compiling out-of-tree modules, put MODVERDIR in the module
  319. # tree rather than in the kernel tree. The kernel tree might
  320. # even be read-only.
  321. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  322. # Files to ignore in find ... statements
  323. RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
  324. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
  325. # ===========================================================================
  326. # Rules shared between *config targets and build targets
  327. # Basic helpers built in scripts/
  328. PHONY += scripts_basic
  329. scripts_basic:
  330. $(Q)$(MAKE) $(build)=scripts/basic
  331. $(Q)rm -f .tmp_quiet_recordmcount
  332. # To avoid any implicit rule to kick in, define an empty command.
  333. scripts/basic/%: scripts_basic ;
  334. PHONY += outputmakefile
  335. # outputmakefile generates a Makefile in the output directory, if using a
  336. # separate output directory. This allows convenient use of make in the
  337. # output directory.
  338. outputmakefile:
  339. ifneq ($(KBUILD_SRC),)
  340. $(Q)ln -fsn $(srctree) source
  341. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  342. $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  343. endif
  344. # To make sure we do not include .config for any of the *config targets
  345. # catch them early, and hand them over to scripts/kconfig/Makefile
  346. # It is allowed to specify more targets when calling make, including
  347. # mixing *config targets and build targets.
  348. # For example 'make oldconfig all'.
  349. # Detect when mixed targets is specified, and make a second invocation
  350. # of make so .config is not included in this case either (for *config).
  351. no-dot-config-targets := clean mrproper distclean \
  352. cscope gtags TAGS tags help %docs check% coccicheck \
  353. include/linux/version.h headers_% \
  354. kernelversion %src-pkg
  355. config-targets := 0
  356. mixed-targets := 0
  357. dot-config := 1
  358. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  359. ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  360. dot-config := 0
  361. endif
  362. endif
  363. ifeq ($(KBUILD_EXTMOD),)
  364. ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  365. config-targets := 1
  366. ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  367. mixed-targets := 1
  368. endif
  369. endif
  370. endif
  371. ifeq ($(mixed-targets),1)
  372. # ===========================================================================
  373. # We're called with mixed targets (*config and build targets).
  374. # Handle them one by one.
  375. %:: FORCE
  376. $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  377. else
  378. ifeq ($(config-targets),1)
  379. # ===========================================================================
  380. # *config targets only - make sure prerequisites are updated, and descend
  381. # in scripts/kconfig to make the *config target
  382. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  383. # KBUILD_DEFCONFIG may point out an alternative default configuration
  384. # used for 'make defconfig'
  385. include $(srctree)/arch/$(SRCARCH)/Makefile
  386. export KBUILD_DEFCONFIG KBUILD_KCONFIG
  387. config: scripts_basic outputmakefile FORCE
  388. $(Q)mkdir -p include/linux include/config
  389. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  390. %config: scripts_basic outputmakefile FORCE
  391. $(Q)mkdir -p include/linux include/config
  392. $(Q)$(MAKE) $(build)=scripts/kconfig $@
  393. else
  394. # ===========================================================================
  395. # Build targets only - this includes vmlinux, arch specific targets, clean
  396. # targets and others. In general all targets except *config targets.
  397. ifeq ($(KBUILD_EXTMOD),)
  398. # Additional helpers built in scripts/
  399. # Carefully list dependencies so we do not try to build scripts twice
  400. # in parallel
  401. PHONY += scripts
  402. scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
  403. $(Q)$(MAKE) $(build)=$(@)
  404. # Objects we will link into vmlinux / subdirs we need to visit
  405. init-y := init/
  406. drivers-y := drivers/ sound/ firmware/
  407. net-y := net/
  408. libs-y := lib/
  409. core-y := usr/
  410. endif # KBUILD_EXTMOD
  411. ifeq ($(dot-config),1)
  412. # Read in config
  413. -include include/config/auto.conf
  414. ifeq ($(KBUILD_EXTMOD),)
  415. # Read in dependencies to all Kconfig* files, make sure to run
  416. # oldconfig if changes are detected.
  417. -include include/config/auto.conf.cmd
  418. # To avoid any implicit rule to kick in, define an empty command
  419. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  420. # If .config is newer than include/config/auto.conf, someone tinkered
  421. # with it and forgot to run make oldconfig.
  422. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  423. # we execute the config step to be sure to catch updated Kconfig files
  424. include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  425. $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  426. else
  427. # external modules needs include/generated/autoconf.h and include/config/auto.conf
  428. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  429. PHONY += include/config/auto.conf
  430. include/config/auto.conf:
  431. $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
  432. echo; \
  433. echo " ERROR: Kernel configuration is invalid."; \
  434. echo " include/generated/autoconf.h or $@ are missing.";\
  435. echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
  436. echo; \
  437. /bin/false)
  438. endif # KBUILD_EXTMOD
  439. else
  440. # Dummy target needed, because used as prerequisite
  441. include/config/auto.conf: ;
  442. endif # $(dot-config)
  443. # The all: target is the default when no target is given on the
  444. # command line.
  445. # This allow a user to issue only 'make' to build a kernel including modules
  446. # Defaults to vmlinux, but the arch makefile usually adds further targets
  447. all: vmlinux
  448. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  449. KBUILD_CFLAGS += -Os
  450. else
  451. KBUILD_CFLAGS += -O2
  452. endif
  453. include $(srctree)/arch/$(SRCARCH)/Makefile
  454. ifneq ($(CONFIG_FRAME_WARN),0)
  455. KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  456. endif
  457. # Force gcc to behave correct even for buggy distributions
  458. ifndef CONFIG_CC_STACKPROTECTOR
  459. KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
  460. endif
  461. ifdef CONFIG_FRAME_POINTER
  462. KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  463. else
  464. # Some targets (ARM with Thumb2, for example), can't be built with frame
  465. # pointers. For those, we don't have FUNCTION_TRACER automatically
  466. # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
  467. # incompatible with -fomit-frame-pointer with current GCC, so we don't use
  468. # -fomit-frame-pointer with FUNCTION_TRACER.
  469. ifndef CONFIG_FUNCTION_TRACER
  470. KBUILD_CFLAGS += -fomit-frame-pointer
  471. endif
  472. endif
  473. ifdef CONFIG_DEBUG_INFO
  474. KBUILD_CFLAGS += -g
  475. KBUILD_AFLAGS += -gdwarf-2
  476. endif
  477. ifdef CONFIG_DEBUG_INFO_REDUCED
  478. KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
  479. endif
  480. ifdef CONFIG_FUNCTION_TRACER
  481. KBUILD_CFLAGS += -pg
  482. ifdef CONFIG_DYNAMIC_FTRACE
  483. ifdef CONFIG_HAVE_C_RECORDMCOUNT
  484. BUILD_C_RECORDMCOUNT := y
  485. export BUILD_C_RECORDMCOUNT
  486. endif
  487. endif
  488. endif
  489. # We trigger additional mismatches with less inlining
  490. ifdef CONFIG_DEBUG_SECTION_MISMATCH
  491. KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  492. endif
  493. # arch Makefile may override CC so keep this after arch Makefile is included
  494. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  495. CHECKFLAGS += $(NOSTDINC_FLAGS)
  496. # warn about C99 declaration after statement
  497. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  498. # disable pointer signed / unsigned warnings in gcc 4.0
  499. KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
  500. # disable invalid "can't wrap" optimizations for signed / pointers
  501. KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
  502. # conserve stack if available
  503. KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
  504. # check for 'asm goto'
  505. ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
  506. KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
  507. endif
  508. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  509. # But warn user when we do so
  510. warn-assign = \
  511. $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
  512. ifneq ($(KCPPFLAGS),)
  513. $(call warn-assign,CPPFLAGS)
  514. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  515. endif
  516. ifneq ($(KAFLAGS),)
  517. $(call warn-assign,AFLAGS)
  518. KBUILD_AFLAGS += $(KAFLAGS)
  519. endif
  520. ifneq ($(KCFLAGS),)
  521. $(call warn-assign,CFLAGS)
  522. KBUILD_CFLAGS += $(KCFLAGS)
  523. endif
  524. # Use --build-id when available.
  525. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  526. $(call cc-ldoption, -Wl$(comma)--build-id,))
  527. KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  528. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  529. ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
  530. LDFLAGS_vmlinux += $(call ld-option, -X,)
  531. endif
  532. # Default kernel image to build when no specific target is given.
  533. # KBUILD_IMAGE may be overruled on the command line or
  534. # set in the environment
  535. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  536. # this default value
  537. export KBUILD_IMAGE ?= vmlinux
  538. #
  539. # INSTALL_PATH specifies where to place the updated kernel and system map
  540. # images. Default is /boot, but you can set it to other values
  541. export INSTALL_PATH ?= /boot
  542. #
  543. # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
  544. # relocations required by build roots. This is not defined in the
  545. # makefile but the argument can be passed to make if needed.
  546. #
  547. MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  548. export MODLIB
  549. #
  550. # INSTALL_MOD_STRIP, if defined, will cause modules to be
  551. # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
  552. # the default option --strip-debug will be used. Otherwise,
  553. # INSTALL_MOD_STRIP value will be used as the options to the strip command.
  554. ifdef INSTALL_MOD_STRIP
  555. ifeq ($(INSTALL_MOD_STRIP),1)
  556. mod_strip_cmd = $(STRIP) --strip-debug
  557. else
  558. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  559. endif # INSTALL_MOD_STRIP=1
  560. else
  561. mod_strip_cmd = true
  562. endif # INSTALL_MOD_STRIP
  563. export mod_strip_cmd
  564. ifeq ($(KBUILD_EXTMOD),)
  565. core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  566. vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  567. $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  568. $(net-y) $(net-m) $(libs-y) $(libs-m)))
  569. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  570. $(init-n) $(init-) \
  571. $(core-n) $(core-) $(drivers-n) $(drivers-) \
  572. $(net-n) $(net-) $(libs-n) $(libs-))))
  573. init-y := $(patsubst %/, %/built-in.o, $(init-y))
  574. core-y := $(patsubst %/, %/built-in.o, $(core-y))
  575. drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
  576. net-y := $(patsubst %/, %/built-in.o, $(net-y))
  577. libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
  578. libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
  579. libs-y := $(libs-y1) $(libs-y2)
  580. # Build vmlinux
  581. # ---------------------------------------------------------------------------
  582. # vmlinux is built from the objects selected by $(vmlinux-init) and
  583. # $(vmlinux-main). Most are built-in.o files from top-level directories
  584. # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
  585. # Ordering when linking is important, and $(vmlinux-init) must be first.
  586. #
  587. # vmlinux
  588. # ^
  589. # |
  590. # +-< $(vmlinux-init)
  591. # | +--< init/version.o + more
  592. # |
  593. # +--< $(vmlinux-main)
  594. # | +--< driver/built-in.o mm/built-in.o + more
  595. # |
  596. # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
  597. #
  598. # vmlinux version (uname -v) cannot be updated during normal
  599. # descending-into-subdirs phase since we do not yet know if we need to
  600. # update vmlinux.
  601. # Therefore this step is delayed until just before final link of vmlinux -
  602. # except in the kallsyms case where it is done just before adding the
  603. # symbols to the kernel.
  604. #
  605. # System.map is generated to document addresses of all kernel symbols
  606. vmlinux-init := $(head-y) $(init-y)
  607. vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  608. vmlinux-all := $(vmlinux-init) $(vmlinux-main)
  609. vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
  610. export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
  611. # Rule to link vmlinux - also used during CONFIG_KALLSYMS
  612. # May be overridden by arch/$(ARCH)/Makefile
  613. quiet_cmd_vmlinux__ ?= LD $@
  614. cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
  615. -T $(vmlinux-lds) $(vmlinux-init) \
  616. --start-group $(vmlinux-main) --end-group \
  617. $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
  618. # Generate new vmlinux version
  619. quiet_cmd_vmlinux_version = GEN .version
  620. cmd_vmlinux_version = set -e; \
  621. if [ ! -r .version ]; then \
  622. rm -f .version; \
  623. echo 1 >.version; \
  624. else \
  625. mv .version .old_version; \
  626. expr 0$$(cat .old_version) + 1 >.version; \
  627. fi; \
  628. $(MAKE) $(build)=init
  629. # Generate System.map
  630. quiet_cmd_sysmap = SYSMAP
  631. cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
  632. # Link of vmlinux
  633. # If CONFIG_KALLSYMS is set .version is already updated
  634. # Generate System.map and verify that the content is consistent
  635. # Use + in front of the vmlinux_version rule to silent warning with make -j2
  636. # First command is ':' to allow us to use + in front of the rule
  637. define rule_vmlinux__
  638. :
  639. $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
  640. $(call cmd,vmlinux__)
  641. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  642. $(Q)$(if $($(quiet)cmd_sysmap), \
  643. echo ' $($(quiet)cmd_sysmap) System.map' &&) \
  644. $(cmd_sysmap) $@ System.map; \
  645. if [ $$? -ne 0 ]; then \
  646. rm -f $@; \
  647. /bin/false; \
  648. fi;
  649. $(verify_kallsyms)
  650. endef
  651. ifdef CONFIG_KALLSYMS
  652. # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
  653. # It's a three stage process:
  654. # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
  655. # empty
  656. # Running kallsyms on that gives us .tmp_kallsyms1.o with
  657. # the right size - vmlinux version (uname -v) is updated during this step
  658. # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
  659. # but due to the added section, some addresses have shifted.
  660. # From here, we generate a correct .tmp_kallsyms2.o
  661. # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
  662. # o Verify that the System.map from vmlinux matches the map from
  663. # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
  664. # o If 'make KALLSYMS_EXTRA_PASS=1" was used, do an extra pass using
  665. # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
  666. # temporary bypass to allow the kernel to be built while the
  667. # maintainers work out what went wrong with kallsyms.
  668. last_kallsyms := 2
  669. ifdef KALLSYMS_EXTRA_PASS
  670. ifneq ($(KALLSYMS_EXTRA_PASS),0)
  671. last_kallsyms := 3
  672. endif
  673. endif
  674. kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
  675. define verify_kallsyms
  676. $(Q)$(if $($(quiet)cmd_sysmap), \
  677. echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
  678. $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
  679. $(Q)cmp -s System.map .tmp_System.map || \
  680. (echo Inconsistent kallsyms data; \
  681. echo This is a bug - please report about it; \
  682. echo Try "make KALLSYMS_EXTRA_PASS=1" as a workaround; \
  683. rm .tmp_kallsyms* ; /bin/false )
  684. endef
  685. # Update vmlinux version before link
  686. # Use + in front of this rule to silent warning about make -j1
  687. # First command is ':' to allow us to use + in front of this rule
  688. cmd_ksym_ld = $(cmd_vmlinux__)
  689. define rule_ksym_ld
  690. :
  691. +$(call cmd,vmlinux_version)
  692. $(call cmd,vmlinux__)
  693. $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
  694. endef
  695. # Generate .S file with all kernel symbols
  696. quiet_cmd_kallsyms = KSYM $@
  697. cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
  698. $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
  699. .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
  700. $(call if_changed_dep,as_o_S)
  701. .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
  702. $(call cmd,kallsyms)
  703. # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
  704. .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
  705. $(call if_changed_rule,ksym_ld)
  706. .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
  707. $(call if_changed,vmlinux__)
  708. .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
  709. $(call if_changed,vmlinux__)
  710. # Needs to visit scripts/ before $(KALLSYMS) can be used.
  711. $(KALLSYMS): scripts ;
  712. # Generate some data for debugging strange kallsyms problems
  713. debug_kallsyms: .tmp_map$(last_kallsyms)
  714. .tmp_map%: .tmp_vmlinux% FORCE
  715. ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
  716. .tmp_map3: .tmp_map2
  717. .tmp_map2: .tmp_map1
  718. endif # ifdef CONFIG_KALLSYMS
  719. # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
  720. # relevant sections renamed as per the linker script.
  721. quiet_cmd_vmlinux-modpost = LD $@
  722. cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
  723. $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
  724. $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
  725. define rule_vmlinux-modpost
  726. :
  727. +$(call cmd,vmlinux-modpost)
  728. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
  729. $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
  730. endef
  731. # vmlinux image - including updated kernel symbols
  732. vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
  733. ifdef CONFIG_HEADERS_CHECK
  734. $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  735. endif
  736. ifdef CONFIG_SAMPLES
  737. $(Q)$(MAKE) $(build)=samples
  738. endif
  739. ifdef CONFIG_BUILD_DOCSRC
  740. $(Q)$(MAKE) $(build)=Documentation
  741. endif
  742. $(call vmlinux-modpost)
  743. $(call if_changed_rule,vmlinux__)
  744. $(Q)rm -f .old_version
  745. # build vmlinux.o first to catch section mismatch errors early
  746. ifdef CONFIG_KALLSYMS
  747. .tmp_vmlinux1: vmlinux.o
  748. endif
  749. modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
  750. vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
  751. $(call if_changed_rule,vmlinux-modpost)
  752. # The actual objects are generated when descending,
  753. # make sure no implicit rule kicks in
  754. $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
  755. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  756. # Preset locale variables to speed up the build process. Limit locale
  757. # tweaks to this spot to avoid wrong language settings when running
  758. # make menuconfig etc.
  759. # Error messages still appears in the original language
  760. PHONY += $(vmlinux-dirs)
  761. $(vmlinux-dirs): prepare scripts
  762. $(Q)$(MAKE) $(build)=$@
  763. # Store (new) KERNELRELASE string in include/config/kernel.release
  764. include/config/kernel.release: include/config/auto.conf FORCE
  765. $(Q)rm -f $@
  766. $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
  767. # Things we need to do before we recursively start building the kernel
  768. # or the modules are listed in "prepare".
  769. # A multi level approach is used. prepareN is processed before prepareN-1.
  770. # archprepare is used in arch Makefiles and when processed asm symlink,
  771. # version.h and scripts_basic is processed / created.
  772. # Listed in dependency order
  773. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  774. # prepare3 is used to check if we are building in a separate output directory,
  775. # and if so do:
  776. # 1) Check that make has not been executed in the kernel src $(srctree)
  777. prepare3: include/config/kernel.release
  778. ifneq ($(KBUILD_SRC),)
  779. @$(kecho) ' Using $(srctree) as source for kernel'
  780. $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  781. echo " $(srctree) is not clean, please run 'make mrproper'";\
  782. echo " in the '$(srctree)' directory.";\
  783. /bin/false; \
  784. fi;
  785. endif
  786. # prepare2 creates a makefile if using a separate output directory
  787. prepare2: prepare3 outputmakefile
  788. prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
  789. include/config/auto.conf
  790. $(cmd_crmodverdir)
  791. archprepare: prepare1 scripts_basic
  792. prepare0: archprepare FORCE
  793. $(Q)$(MAKE) $(build)=.
  794. $(Q)$(MAKE) $(build)=. missing-syscalls
  795. # All the preparing..
  796. prepare: prepare0
  797. # Generate some files
  798. # ---------------------------------------------------------------------------
  799. # KERNELRELEASE can change from a few different places, meaning version.h
  800. # needs to be updated, so this check is forced on all builds
  801. uts_len := 64
  802. define filechk_utsrelease.h
  803. if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  804. echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
  805. exit 1; \
  806. fi; \
  807. (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  808. endef
  809. define filechk_version.h
  810. (echo \#define LINUX_VERSION_CODE $(shell \
  811. expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
  812. echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  813. endef
  814. include/linux/version.h: $(srctree)/Makefile FORCE
  815. $(call filechk,version.h)
  816. include/generated/utsrelease.h: include/config/kernel.release FORCE
  817. $(call filechk,utsrelease.h)
  818. PHONY += headerdep
  819. headerdep:
  820. $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
  821. # ---------------------------------------------------------------------------
  822. PHONY += depend dep
  823. depend dep:
  824. @echo '*** Warning: make $@ is unnecessary now.'
  825. # ---------------------------------------------------------------------------
  826. # Firmware install
  827. INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
  828. export INSTALL_FW_PATH
  829. PHONY += firmware_install
  830. firmware_install: FORCE
  831. @mkdir -p $(objtree)/firmware
  832. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
  833. # ---------------------------------------------------------------------------
  834. # Kernel headers
  835. #Default location for installed headers
  836. export INSTALL_HDR_PATH = $(objtree)/usr
  837. hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
  838. # If we do an all arch process set dst to asm-$(hdr-arch)
  839. hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
  840. PHONY += __headers
  841. __headers: include/linux/version.h scripts_basic FORCE
  842. $(Q)$(MAKE) $(build)=scripts build_unifdef
  843. PHONY += headers_install_all
  844. headers_install_all:
  845. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
  846. PHONY += headers_install
  847. headers_install: __headers
  848. $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
  849. $(error Headers not exportable for the $(SRCARCH) architecture))
  850. $(Q)$(MAKE) $(hdr-inst)=include
  851. $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
  852. PHONY += headers_check_all
  853. headers_check_all: headers_install_all
  854. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
  855. PHONY += headers_check
  856. headers_check: headers_install
  857. $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
  858. $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
  859. # ---------------------------------------------------------------------------
  860. # Modules
  861. ifdef CONFIG_MODULES
  862. # By default, build modules as well
  863. all: modules
  864. # Build modules
  865. #
  866. # A module can be listed more than once in obj-m resulting in
  867. # duplicate lines in modules.order files. Those are removed
  868. # using awk while concatenating to the final file.
  869. PHONY += modules
  870. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
  871. $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
  872. @$(kecho) ' Building modules, stage 2.';
  873. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  874. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
  875. modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
  876. $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
  877. %/modules.builtin: include/config/auto.conf
  878. $(Q)$(MAKE) $(modbuiltin)=$*
  879. # Target to prepare building external modules
  880. PHONY += modules_prepare
  881. modules_prepare: prepare scripts
  882. # Target to install modules
  883. PHONY += modules_install
  884. modules_install: _modinst_ _modinst_post
  885. PHONY += _modinst_
  886. _modinst_:
  887. @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
  888. echo "Warning: you may need to install module-init-tools"; \
  889. echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
  890. sleep 1; \
  891. fi
  892. @rm -rf $(MODLIB)/kernel
  893. @rm -f $(MODLIB)/source
  894. @mkdir -p $(MODLIB)/kernel
  895. @ln -s $(srctree) $(MODLIB)/source
  896. @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
  897. rm -f $(MODLIB)/build ; \
  898. ln -s $(objtree) $(MODLIB)/build ; \
  899. fi
  900. @cp -f $(objtree)/modules.order $(MODLIB)/
  901. @cp -f $(objtree)/modules.builtin $(MODLIB)/
  902. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  903. # This depmod is only for convenience to give the initial
  904. # boot a modules.dep even before / is mounted read-write. However the
  905. # boot script depmod is the master version.
  906. PHONY += _modinst_post
  907. _modinst_post: _modinst_
  908. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
  909. $(call cmd,depmod)
  910. else # CONFIG_MODULES
  911. # Modules not configured
  912. # ---------------------------------------------------------------------------
  913. modules modules_install: FORCE
  914. @echo
  915. @echo "The present kernel configuration has modules disabled."
  916. @echo "Type 'make config' and enable loadable module support."
  917. @echo "Then build a kernel with module support enabled."
  918. @echo
  919. @exit 1
  920. endif # CONFIG_MODULES
  921. ###
  922. # Cleaning is done on three levels.
  923. # make clean Delete most generated files
  924. # Leave enough to build external modules
  925. # make mrproper Delete the current configuration, and all generated files
  926. # make distclean Remove editor backup files, patch leftover files and the like
  927. # Directories & files removed with 'make clean'
  928. CLEAN_DIRS += $(MODVERDIR)
  929. CLEAN_FILES += vmlinux System.map \
  930. .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
  931. # Directories & files removed with 'make mrproper'
  932. MRPROPER_DIRS += include/config usr/include include/generated
  933. MRPROPER_FILES += .config .config.old .version .old_version \
  934. include/linux/version.h \
  935. Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
  936. # clean - Delete most, but leave enough to build external modules
  937. #
  938. clean: rm-dirs := $(CLEAN_DIRS)
  939. clean: rm-files := $(CLEAN_FILES)
  940. clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation)
  941. PHONY += $(clean-dirs) clean archclean
  942. $(clean-dirs):
  943. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  944. clean: archclean
  945. # mrproper - Delete all generated files, including .config
  946. #
  947. mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
  948. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  949. mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
  950. PHONY += $(mrproper-dirs) mrproper archmrproper
  951. $(mrproper-dirs):
  952. $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  953. mrproper: clean archmrproper $(mrproper-dirs)
  954. $(call cmd,rmdirs)
  955. $(call cmd,rmfiles)
  956. # distclean
  957. #
  958. PHONY += distclean
  959. distclean: mrproper
  960. @find $(srctree) $(RCS_FIND_IGNORE) \
  961. \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  962. -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  963. -o -name '.*.rej' -o -size 0 \
  964. -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  965. -type f -print | xargs rm -f
  966. # Packaging of the kernel to various formats
  967. # ---------------------------------------------------------------------------
  968. # rpm target kept for backward compatibility
  969. package-dir := $(srctree)/scripts/package
  970. %src-pkg: FORCE
  971. $(Q)$(MAKE) $(build)=$(package-dir) $@
  972. %pkg: include/config/kernel.release FORCE
  973. $(Q)$(MAKE) $(build)=$(package-dir) $@
  974. rpm: include/config/kernel.release FORCE
  975. $(Q)$(MAKE) $(build)=$(package-dir) $@
  976. # Brief documentation of the typical targets used
  977. # ---------------------------------------------------------------------------
  978. boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
  979. boards := $(notdir $(boards))
  980. board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  981. board-dirs := $(sort $(notdir $(board-dirs:/=)))
  982. help:
  983. @echo 'Cleaning targets:'
  984. @echo ' clean - Remove most generated files but keep the config and'
  985. @echo ' enough build support to build external modules'
  986. @echo ' mrproper - Remove all generated files + config + various backup files'
  987. @echo ' distclean - mrproper + remove editor backup and patch files'
  988. @echo ''
  989. @echo 'Configuration targets:'
  990. @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  991. @echo ''
  992. @echo 'Other generic targets:'
  993. @echo ' all - Build all targets marked with [*]'
  994. @echo '* vmlinux - Build the bare kernel'
  995. @echo '* modules - Build all modules'
  996. @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  997. @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
  998. @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
  999. @echo ' dir/ - Build all files in dir and below'
  1000. @echo ' dir/file.[oisS] - Build specified target only'
  1001. @echo ' dir/file.lst - Build specified mixed source/assembly target only'
  1002. @echo ' (requires a recent binutils and recent build (System.map))'
  1003. @echo ' dir/file.ko - Build module including final link'
  1004. @echo ' modules_prepare - Set up for building external modules'
  1005. @echo ' tags/TAGS - Generate tags file for editors'
  1006. @echo ' cscope - Generate cscope index'
  1007. @echo ' gtags - Generate GNU GLOBAL index'
  1008. @echo ' kernelrelease - Output the release version string'
  1009. @echo ' kernelversion - Output the version stored in Makefile'
  1010. @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  1011. echo ' (default: $(INSTALL_HDR_PATH))'; \
  1012. echo ''
  1013. @echo 'Static analysers'
  1014. @echo ' checkstack - Generate a list of stack hogs'
  1015. @echo ' namespacecheck - Name space analysis on compiled kernel'
  1016. @echo ' versioncheck - Sanity check on version.h usage'
  1017. @echo ' includecheck - Check for duplicate included header files'
  1018. @echo ' export_report - List the usages of all exported symbols'
  1019. @echo ' headers_check - Sanity check on exported headers'
  1020. @echo ' headerdep - Detect inclusion cycles in headers'
  1021. @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
  1022. @echo ''
  1023. @echo 'Kernel packaging:'
  1024. @$(MAKE) $(build)=$(package-dir) help
  1025. @echo ''
  1026. @echo 'Documentation targets:'
  1027. @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  1028. @echo ''
  1029. @echo 'Architecture specific targets ($(SRCARCH)):'
  1030. @$(if $(archhelp),$(archhelp),\
  1031. echo ' No architecture specific help defined for $(SRCARCH)')
  1032. @echo ''
  1033. @$(if $(boards), \
  1034. $(foreach b, $(boards), \
  1035. printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  1036. echo '')
  1037. @$(if $(board-dirs), \
  1038. $(foreach b, $(board-dirs), \
  1039. printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
  1040. printf " %-16s - Show all of the above\\n" help-boards; \
  1041. echo '')
  1042. @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1043. @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
  1044. @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
  1045. @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
  1046. @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
  1047. @echo ' make W=1 [targets] Enable extra gcc checks'
  1048. @echo ''
  1049. @echo 'Execute "make" or "make all" to build all targets marked with [*] '
  1050. @echo 'For further info see the ./README file'
  1051. help-board-dirs := $(addprefix help-,$(board-dirs))
  1052. help-boards: $(help-board-dirs)
  1053. boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
  1054. $(help-board-dirs): help-%:
  1055. @echo 'Architecture specific targets ($(SRCARCH) $*):'
  1056. @$(if $(boards-per-dir), \
  1057. $(foreach b, $(boards-per-dir), \
  1058. printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
  1059. echo '')
  1060. # Documentation targets
  1061. # ---------------------------------------------------------------------------
  1062. %docs: scripts_basic FORCE
  1063. $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  1064. else # KBUILD_EXTMOD
  1065. ###
  1066. # External module support.
  1067. # When building external modules the kernel used as basis is considered
  1068. # read-only, and no consistency checks are made and the make
  1069. # system is not used on the basis kernel. If updates are required
  1070. # in the basis kernel ordinary make commands (without M=...) must
  1071. # be used.
  1072. #
  1073. # The following are the only valid targets when building external
  1074. # modules.
  1075. # make M=dir clean Delete all automatically generated files
  1076. # make M=dir modules Make all modules in specified dir
  1077. # make M=dir Same as 'make M=dir modules'
  1078. # make M=dir modules_install
  1079. # Install the modules built in the module directory
  1080. # Assumes install directory is already created
  1081. # We are always building modules
  1082. KBUILD_MODULES := 1
  1083. PHONY += crmodverdir
  1084. crmodverdir:
  1085. $(cmd_crmodverdir)
  1086. PHONY += $(objtree)/Module.symvers
  1087. $(objtree)/Module.symvers:
  1088. @test -e $(objtree)/Module.symvers || ( \
  1089. echo; \
  1090. echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1091. echo " is missing; modules will have no dependencies and modversions."; \
  1092. echo )
  1093. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1094. PHONY += $(module-dirs) modules
  1095. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1096. $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1097. modules: $(module-dirs)
  1098. @$(kecho) ' Building modules, stage 2.';
  1099. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1100. PHONY += modules_install
  1101. modules_install: _emodinst_ _emodinst_post
  1102. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1103. PHONY += _emodinst_
  1104. _emodinst_:
  1105. $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1106. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1107. PHONY += _emodinst_post
  1108. _emodinst_post: _emodinst_
  1109. $(call cmd,depmod)
  1110. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1111. PHONY += $(clean-dirs) clean
  1112. $(clean-dirs):
  1113. $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1114. clean: rm-dirs := $(MODVERDIR)
  1115. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1116. help:
  1117. @echo ' Building external modules.'
  1118. @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
  1119. @echo ''
  1120. @echo ' modules - default target, build the module(s)'
  1121. @echo ' modules_install - install the module'
  1122. @echo ' clean - remove generated files in module directory only'
  1123. @echo ''
  1124. # Dummies...
  1125. PHONY += prepare scripts
  1126. prepare: ;
  1127. scripts: ;
  1128. endif # KBUILD_EXTMOD
  1129. clean: $(clean-dirs)
  1130. $(call cmd,rmdirs)
  1131. $(call cmd,rmfiles)
  1132. @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
  1133. \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1134. -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  1135. -o -name '*.symtypes' -o -name 'modules.order' \
  1136. -o -name modules.builtin -o -name '.tmp_*.o.*' \
  1137. -o -name '*.gcno' \) -type f -print | xargs rm -f
  1138. # Generate tags for editors
  1139. # ---------------------------------------------------------------------------
  1140. quiet_cmd_tags = GEN $@
  1141. cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
  1142. tags TAGS cscope gtags: FORCE
  1143. $(call cmd,tags)
  1144. # Scripts to check various things for consistency
  1145. # ---------------------------------------------------------------------------
  1146. includecheck:
  1147. find * $(RCS_FIND_IGNORE) \
  1148. -name '*.[hcS]' -type f -print | sort \
  1149. | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
  1150. versioncheck:
  1151. find * $(RCS_FIND_IGNORE) \
  1152. -name '*.[hcS]' -type f -print | sort \
  1153. | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
  1154. coccicheck:
  1155. $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
  1156. namespacecheck:
  1157. $(PERL) $(srctree)/scripts/namespace.pl
  1158. export_report:
  1159. $(PERL) $(srctree)/scripts/export_report.pl
  1160. endif #ifeq ($(config-targets),1)
  1161. endif #ifeq ($(mixed-targets),1)
  1162. PHONY += checkstack kernelrelease kernelversion
  1163. # UML needs a little special treatment here. It wants to use the host
  1164. # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
  1165. # else wants $(ARCH), including people doing cross-builds, which means
  1166. # that $(SUBARCH) doesn't work here.
  1167. ifeq ($(ARCH), um)
  1168. CHECKSTACK_ARCH := $(SUBARCH)
  1169. else
  1170. CHECKSTACK_ARCH := $(ARCH)
  1171. endif
  1172. checkstack:
  1173. $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1174. $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1175. kernelrelease:
  1176. @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
  1177. kernelversion:
  1178. @echo $(KERNELVERSION)
  1179. # Single targets
  1180. # ---------------------------------------------------------------------------
  1181. # Single targets are compatible with:
  1182. # - build with mixed source and output
  1183. # - build with separate output dir 'make O=...'
  1184. # - external modules
  1185. #
  1186. # target-dir => where to store outputfile
  1187. # build-dir => directory in kernel source tree to use
  1188. ifeq ($(KBUILD_EXTMOD),)
  1189. build-dir = $(patsubst %/,%,$(dir $@))
  1190. target-dir = $(dir $@)
  1191. else
  1192. zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1193. build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1194. target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1195. endif
  1196. %.s: %.c prepare scripts FORCE
  1197. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1198. %.i: %.c prepare scripts FORCE
  1199. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1200. %.o: %.c prepare scripts FORCE
  1201. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1202. %.lst: %.c prepare scripts FORCE
  1203. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1204. %.s: %.S prepare scripts FORCE
  1205. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1206. %.o: %.S prepare scripts FORCE
  1207. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1208. %.symtypes: %.c prepare scripts FORCE
  1209. $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1210. # Modules
  1211. /: prepare scripts FORCE
  1212. $(cmd_crmodverdir)
  1213. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1214. $(build)=$(build-dir)
  1215. %/: prepare scripts FORCE
  1216. $(cmd_crmodverdir)
  1217. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1218. $(build)=$(build-dir)
  1219. %.ko: prepare scripts FORCE
  1220. $(cmd_crmodverdir)
  1221. $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1222. $(build)=$(build-dir) $(@:.ko=.o)
  1223. $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1224. # FIXME Should go into a make.lib or something
  1225. # ===========================================================================
  1226. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
  1227. cmd_rmdirs = rm -rf $(rm-dirs)
  1228. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
  1229. cmd_rmfiles = rm -f $(rm-files)
  1230. # Run depmod only if we have System.map and depmod is executable
  1231. quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
  1232. cmd_depmod = \
  1233. if [ -r System.map -a -x $(DEPMOD) ]; then \
  1234. $(DEPMOD) -ae -F System.map \
  1235. $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
  1236. $(KERNELRELEASE); \
  1237. fi
  1238. # Create temporary dir for module support files
  1239. # clean it up only when building all modules
  1240. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1241. $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1242. a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
  1243. $(KBUILD_AFLAGS_KERNEL) \
  1244. $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
  1245. $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
  1246. quiet_cmd_as_o_S = AS $@
  1247. cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
  1248. # read all saved command lines
  1249. targets := $(wildcard $(sort $(targets)))
  1250. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1251. ifneq ($(cmd_files),)
  1252. $(cmd_files): ; # Do not try to update included dependency files
  1253. include $(cmd_files)
  1254. endif
  1255. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1256. # Usage:
  1257. # $(Q)$(MAKE) $(clean)=dir
  1258. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1259. endif # skip-makefile
  1260. PHONY += FORCE
  1261. FORCE:
  1262. # Declare the contents of the .PHONY variable as phony. We keep that
  1263. # information in a variable so we can use it in if_changed and friends.
  1264. .PHONY: $(PHONY)