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Ubuntu Raring Kernel Makefile

By: SamerAfach on Aug 30th, 2013  |  syntax: Make  |  size: 48.81 KB  |  views: 52  |  expires: Never
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  1. VERSION = 3
  2. PATCHLEVEL = 8
  3. SUBLEVEL = 13
  4. EXTRAVERSION = .6
  5. NAME = Remoralised Urchins Update
  6.  
  7. # *DOCUMENTATION*
  8. # To see a list of typical targets execute "make help"
  9. # More info can be located in ./README
  10. # Comments in this file are targeted only to the developer, do not
  11. # expect to learn how to build the kernel reading this file.
  12.  
  13. # Do not:
  14. # o  use make's built-in rules and variables
  15. #    (this increases performance and avoids hard-to-debug behaviour);
  16. # o  print "Entering directory ...";
  17. MAKEFLAGS += -rR --no-print-directory
  18.  
  19. # Avoid funny character set dependencies
  20. unexport LC_ALL
  21. LC_COLLATE=C
  22. LC_NUMERIC=C
  23. export LC_COLLATE LC_NUMERIC
  24.  
  25. # We are using a recursive build, so we need to do a little thinking
  26. # to get the ordering right.
  27. #
  28. # Most importantly: sub-Makefiles should only ever modify files in
  29. # their own directory. If in some directory we have a dependency on
  30. # a file in another dir (which doesn't happen often, but it's often
  31. # unavoidable when linking the built-in.o targets which finally
  32. # turn into vmlinux), we will call a sub make in that other dir, and
  33. # after that we are sure that everything which is in that other dir
  34. # is now up to date.
  35. #
  36. # The only cases where we need to modify files which have global
  37. # effects are thus separated out and done before the recursive
  38. # descending is started. They are now explicitly listed as the
  39. # prepare rule.
  40.  
  41. # To put more focus on warnings, be less verbose as default
  42. # Use 'make V=1' to see the full commands
  43.  
  44. ifeq ("$(origin V)", "command line")
  45.   KBUILD_VERBOSE = $(V)
  46. endif
  47. ifndef KBUILD_VERBOSE
  48.   KBUILD_VERBOSE = 0
  49. endif
  50.  
  51. # Call a source code checker (by default, "sparse") as part of the
  52. # C compilation.
  53. #
  54. # Use 'make C=1' to enable checking of only re-compiled files.
  55. # Use 'make C=2' to enable checking of *all* source files, regardless
  56. # of whether they are re-compiled or not.
  57. #
  58. # See the file "Documentation/sparse.txt" for more details, including
  59. # where to get the "sparse" utility.
  60.  
  61. ifeq ("$(origin C)", "command line")
  62.   KBUILD_CHECKSRC = $(C)
  63. endif
  64. ifndef KBUILD_CHECKSRC
  65.   KBUILD_CHECKSRC = 0
  66. endif
  67.  
  68. # Use make M=dir to specify directory of external module to build
  69. # Old syntax make ... SUBDIRS=$PWD is still supported
  70. # Setting the environment variable KBUILD_EXTMOD take precedence
  71. ifdef SUBDIRS
  72.   KBUILD_EXTMOD ?= $(SUBDIRS)
  73. endif
  74.  
  75. ifeq ("$(origin M)", "command line")
  76.   KBUILD_EXTMOD := $(M)
  77. endif
  78.  
  79. # kbuild supports saving output files in a separate directory.
  80. # To locate output files in a separate directory two syntaxes are supported.
  81. # In both cases the working directory must be the root of the kernel src.
  82. # 1) O=
  83. # Use "make O=dir/to/store/output/files/"
  84. #
  85. # 2) Set KBUILD_OUTPUT
  86. # Set the environment variable KBUILD_OUTPUT to point to the directory
  87. # where the output files shall be placed.
  88. # export KBUILD_OUTPUT=dir/to/store/output/files/
  89. # make
  90. #
  91. # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  92. # variable.
  93.  
  94.  
  95. # KBUILD_SRC is set on invocation of make in OBJ directory
  96. # KBUILD_SRC is not intended to be used by the regular user (for now)
  97. ifeq ($(KBUILD_SRC),)
  98.  
  99. # OK, Make called in directory where kernel src resides
  100. # Do we want to locate output files in a separate directory?
  101. ifeq ("$(origin O)", "command line")
  102.   KBUILD_OUTPUT := $(O)
  103. endif
  104.  
  105. ifeq ("$(origin W)", "command line")
  106.   export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
  107. endif
  108.  
  109. # That's our default target when none is given on the command line
  110. PHONY := _all
  111. _all:
  112.  
  113. # Cancel implicit rules on top Makefile
  114. $(CURDIR)/Makefile Makefile: ;
  115.  
  116. ifneq ($(KBUILD_OUTPUT),)
  117. # Invoke a second make in the output directory, passing relevant variables
  118. # check that the output directory actually exists
  119. saved-output := $(KBUILD_OUTPUT)
  120. KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
  121. $(if $(KBUILD_OUTPUT),, \
  122.      $(error output directory "$(saved-output)" does not exist))
  123.  
  124. PHONY += $(MAKECMDGOALS) sub-make
  125.  
  126. $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
  127.         @:
  128.  
  129. sub-make: FORCE
  130.         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
  131.         KBUILD_SRC=$(CURDIR) \
  132.         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
  133.         $(filter-out _all sub-make,$(MAKECMDGOALS))
  134.  
  135. # Leave processing to above invocation of make
  136. skip-makefile := 1
  137. endif # ifneq ($(KBUILD_OUTPUT),)
  138. endif # ifeq ($(KBUILD_SRC),)
  139.  
  140. # We process the rest of the Makefile if this is the final invocation of make
  141. ifeq ($(skip-makefile),)
  142.  
  143. # If building an external module we do not care about the all: rule
  144. # but instead _all depend on modules
  145. PHONY += all
  146. ifeq ($(KBUILD_EXTMOD),)
  147. _all: all
  148. else
  149. _all: modules
  150. endif
  151.  
  152. srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
  153. objtree         := $(CURDIR)
  154. src             := $(srctree)
  155. obj             := $(objtree)
  156.  
  157. VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
  158.  
  159. export srctree objtree VPATH
  160.  
  161.  
  162. # SUBARCH tells the usermode build what the underlying arch is.  That is set
  163. # first, and if a usermode build is happening, the "ARCH=um" on the command
  164. # line overrides the setting of ARCH below.  If a native build is happening,
  165. # then ARCH is assigned, getting whatever value it gets normally, and
  166. # SUBARCH is subsequently ignored.
  167.  
  168. SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
  169.                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
  170.                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
  171.                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  172.                                   -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
  173.  
  174. # Cross compiling and selecting different set of gcc/bin-utils
  175. # ---------------------------------------------------------------------------
  176. #
  177. # When performing cross compilation for other architectures ARCH shall be set
  178. # to the target architecture. (See arch/* for the possibilities).
  179. # ARCH can be set during invocation of make:
  180. # make ARCH=ia64
  181. # Another way is to have ARCH set in the environment.
  182. # The default ARCH is the host where make is executed.
  183.  
  184. # CROSS_COMPILE specify the prefix used for all executables used
  185. # during compilation. Only gcc and related bin-utils executables
  186. # are prefixed with $(CROSS_COMPILE).
  187. # CROSS_COMPILE can be set on the command line
  188. # make CROSS_COMPILE=ia64-linux-
  189. # Alternatively CROSS_COMPILE can be set in the environment.
  190. # A third alternative is to store a setting in .config so that plain
  191. # "make" in the configured kernel build directory always uses that.
  192. # Default value for CROSS_COMPILE is not to prefix executables
  193. # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
  194. export KBUILD_BUILDHOST := $(SUBARCH)
  195. ARCH            ?= $(SUBARCH)
  196. CROSS_COMPILE   ?= $(CONFIG_CROSS_COMPILE:"%"=%)
  197.  
  198. # Architecture as present in compile.h
  199. UTS_MACHINE     := $(ARCH)
  200. SRCARCH         := $(ARCH)
  201.  
  202. # Additional ARCH settings for x86
  203. ifeq ($(ARCH),i386)
  204.         SRCARCH := x86
  205. endif
  206. ifeq ($(ARCH),x86_64)
  207.         SRCARCH := x86
  208. endif
  209.  
  210. # Additional ARCH settings for sparc
  211. ifeq ($(ARCH),sparc32)
  212.        SRCARCH := sparc
  213. endif
  214. ifeq ($(ARCH),sparc64)
  215.        SRCARCH := sparc
  216. endif
  217.  
  218. # Additional ARCH settings for sh
  219. ifeq ($(ARCH),sh64)
  220.        SRCARCH := sh
  221. endif
  222.  
  223. # Additional ARCH settings for tile
  224. ifeq ($(ARCH),tilepro)
  225.        SRCARCH := tile
  226. endif
  227. ifeq ($(ARCH),tilegx)
  228.        SRCARCH := tile
  229. endif
  230.  
  231. # Where to locate arch specific headers
  232. hdr-arch  := $(SRCARCH)
  233.  
  234. KCONFIG_CONFIG  ?= .config
  235. export KCONFIG_CONFIG
  236.  
  237. # SHELL used by kbuild
  238. CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  239.           else if [ -x /bin/bash ]; then echo /bin/bash; \
  240.           else echo sh; fi ; fi)
  241.  
  242. HOSTCC       = gcc
  243. HOSTCXX      = g++
  244. HOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
  245. HOSTCXXFLAGS = -O2
  246.  
  247. # Decide whether to build built-in, modular, or both.
  248. # Normally, just do built-in.
  249.  
  250. KBUILD_MODULES :=
  251. KBUILD_BUILTIN := 1
  252.  
  253. #       If we have only "make modules", don't compile built-in objects.
  254. #       When we're building modules with modversions, we need to consider
  255. #       the built-in objects during the descend as well, in order to
  256. #       make sure the checksums are up to date before we record them.
  257.  
  258. ifeq ($(MAKECMDGOALS),modules)
  259.   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
  260. endif
  261.  
  262. #       If we have "make <whatever> modules", compile modules
  263. #       in addition to whatever we do anyway.
  264. #       Just "make" or "make all" shall build modules as well
  265.  
  266. ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  267.   KBUILD_MODULES := 1
  268. endif
  269.  
  270. ifeq ($(MAKECMDGOALS),)
  271.   KBUILD_MODULES := 1
  272. endif
  273.  
  274. export KBUILD_MODULES KBUILD_BUILTIN
  275. export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
  276.  
  277. # Beautify output
  278. # ---------------------------------------------------------------------------
  279. #
  280. # Normally, we echo the whole command before executing it. By making
  281. # that echo $($(quiet)$(cmd)), we now have the possibility to set
  282. # $(quiet) to choose other forms of output instead, e.g.
  283. #
  284. #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
  285. #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
  286. #
  287. # If $(quiet) is empty, the whole command will be printed.
  288. # If it is set to "quiet_", only the short version will be printed.
  289. # If it is set to "silent_", nothing will be printed at all, since
  290. # the variable $(silent_cmd_cc_o_c) doesn't exist.
  291. #
  292. # A simple variant is to prefix commands with $(Q) - that's useful
  293. # for commands that shall be hidden in non-verbose mode.
  294. #
  295. #       $(Q)ln $@ :<
  296. #
  297. # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
  298. # If KBUILD_VERBOSE equals 1 then the above command is displayed.
  299.  
  300. ifeq ($(KBUILD_VERBOSE),1)
  301.   quiet =
  302.   Q =
  303. else
  304.   quiet=quiet_
  305.   Q = @
  306. endif
  307.  
  308. # If the user is running make -s (silent mode), suppress echoing of
  309. # commands
  310.  
  311. ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
  312.   quiet=silent_
  313. endif
  314.  
  315. export quiet Q KBUILD_VERBOSE
  316.  
  317.  
  318. # Look for make include files relative to root of kernel src
  319. MAKEFLAGS += --include-dir=$(srctree)
  320.  
  321. # We need some generic definitions (do not try to remake the file).
  322. $(srctree)/scripts/Kbuild.include: ;
  323. include $(srctree)/scripts/Kbuild.include
  324.  
  325. # Make variables (CC, etc...)
  326.  
  327. AS              = $(CROSS_COMPILE)as
  328. LD              = $(CROSS_COMPILE)ld
  329. CC              = $(CROSS_COMPILE)gcc
  330. CPP             = $(CC) -E
  331. AR              = $(CROSS_COMPILE)ar
  332. NM              = $(CROSS_COMPILE)nm
  333. STRIP           = $(CROSS_COMPILE)strip
  334. OBJCOPY         = $(CROSS_COMPILE)objcopy
  335. OBJDUMP         = $(CROSS_COMPILE)objdump
  336. AWK             = awk
  337. GENKSYMS        = scripts/genksyms/genksyms
  338. INSTALLKERNEL  := installkernel
  339. DEPMOD          = /sbin/depmod
  340. PERL            = perl
  341. CHECK           = sparse
  342.  
  343. CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
  344.                   -Wbitwise -Wno-return-void $(CF)
  345. CFLAGS_MODULE   =
  346. AFLAGS_MODULE   =
  347. LDFLAGS_MODULE  =
  348. CFLAGS_KERNEL   =
  349. AFLAGS_KERNEL   =
  350. CFLAGS_GCOV     = -fprofile-arcs -ftest-coverage
  351.  
  352. # Prefer linux-backports-modules
  353. ifneq ($(KBUILD_SRC),)
  354. ifneq ($(shell if test -e $(KBUILD_OUTPUT)/ubuntu-build; then echo yes; fi),yes)
  355. UBUNTUINCLUDE := -I/usr/src/linux-headers-lbm-$(KERNELRELEASE)
  356. endif
  357. endif
  358.  
  359. # Use USERINCLUDE when you must reference the UAPI directories only.
  360. USERINCLUDE    := \
  361.                 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
  362.                 -Iarch/$(hdr-arch)/include/generated/uapi \
  363.                 -I$(srctree)/include/uapi \
  364.                 -Iinclude/generated/uapi \
  365.                 -include $(srctree)/include/linux/kconfig.h
  366.  
  367. # Use LINUXINCLUDE when you must reference the include/ directory.
  368. # Needed to be compatible with the O= option
  369. LINUXINCLUDE    := \
  370.                 $(UBUNTUINCLUDE) \
  371.                 -I$(srctree)/arch/$(hdr-arch)/include \
  372.                 -Iarch/$(hdr-arch)/include/generated \
  373.                 $(if $(KBUILD_SRC), -I$(srctree)/include) \
  374.                 -Iinclude \
  375.                 $(USERINCLUDE)
  376.  
  377. # UBUNTU: Include our third party driver stuff too
  378. LINUXINCLUDE   += -Iubuntu/include $(if $(KBUILD_SRC),-I$(srctree)/ubuntu/include)
  379.  
  380. KBUILD_CPPFLAGS := -D__KERNEL__
  381.  
  382. KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
  383.                    -fno-strict-aliasing -fno-common \
  384.                    -Werror-implicit-function-declaration \
  385.                    -Wno-format-security \
  386.                    -fno-delete-null-pointer-checks
  387. KBUILD_AFLAGS_KERNEL :=
  388. KBUILD_CFLAGS_KERNEL :=
  389. KBUILD_AFLAGS   := -D__ASSEMBLY__
  390. KBUILD_AFLAGS_MODULE  := -DMODULE
  391. KBUILD_CFLAGS_MODULE  := -DMODULE
  392. KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
  393.  
  394. # Read KERNELRELEASE from include/config/kernel.release (if it exists)
  395. KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
  396. KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
  397.  
  398. export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
  399. export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
  400. export CPP AR NM STRIP OBJCOPY OBJDUMP
  401. export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
  402. export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
  403.  
  404. export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
  405. export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
  406. export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
  407. export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
  408. export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
  409. export KBUILD_ARFLAGS
  410.  
  411. # When compiling out-of-tree modules, put MODVERDIR in the module
  412. # tree rather than in the kernel tree. The kernel tree might
  413. # even be read-only.
  414. export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
  415.  
  416. # Files to ignore in find ... statements
  417.  
  418. RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
  419.                    -o -name .pc -o -name .hg -o -name .git \) -prune -o
  420. export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
  421.                          --exclude CVS --exclude .pc --exclude .hg --exclude .git
  422.  
  423. # ===========================================================================
  424. # Rules shared between *config targets and build targets
  425.  
  426. # Basic helpers built in scripts/
  427. PHONY += scripts_basic
  428. scripts_basic:
  429.         $(Q)$(MAKE) $(build)=scripts/basic
  430.         $(Q)rm -f .tmp_quiet_recordmcount
  431.  
  432. # To avoid any implicit rule to kick in, define an empty command.
  433. scripts/basic/%: scripts_basic ;
  434.  
  435. PHONY += outputmakefile
  436. # outputmakefile generates a Makefile in the output directory, if using a
  437. # separate output directory. This allows convenient use of make in the
  438. # output directory.
  439. outputmakefile:
  440. ifneq ($(KBUILD_SRC),)
  441.         $(Q)ln -fsn $(srctree) source
  442.         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
  443.             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
  444. endif
  445.  
  446. # Support for using generic headers in asm-generic
  447. PHONY += asm-generic
  448. asm-generic:
  449.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
  450.                     src=asm obj=arch/$(SRCARCH)/include/generated/asm
  451.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
  452.                     src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
  453.  
  454. # To make sure we do not include .config for any of the *config targets
  455. # catch them early, and hand them over to scripts/kconfig/Makefile
  456. # It is allowed to specify more targets when calling make, including
  457. # mixing *config targets and build targets.
  458. # For example 'make oldconfig all'.
  459. # Detect when mixed targets is specified, and make a second invocation
  460. # of make so .config is not included in this case either (for *config).
  461.  
  462. version_h := include/generated/uapi/linux/version.h
  463.  
  464. no-dot-config-targets := clean mrproper distclean \
  465.                          cscope gtags TAGS tags help %docs check% coccicheck \
  466.                          $(version_h) headers_% archheaders archscripts \
  467.                          kernelversion %src-pkg
  468.  
  469. config-targets := 0
  470. mixed-targets  := 0
  471. dot-config     := 1
  472.  
  473. ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
  474.         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
  475.                 dot-config := 0
  476.         endif
  477. endif
  478.  
  479. ifeq ($(KBUILD_EXTMOD),)
  480.         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
  481.                 config-targets := 1
  482.                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
  483.                         mixed-targets := 1
  484.                 endif
  485.         endif
  486. endif
  487.  
  488. ifeq ($(mixed-targets),1)
  489. # ===========================================================================
  490. # We're called with mixed targets (*config and build targets).
  491. # Handle them one by one.
  492.  
  493. %:: FORCE
  494.         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
  495.  
  496. else
  497. ifeq ($(config-targets),1)
  498. # ===========================================================================
  499. # *config targets only - make sure prerequisites are updated, and descend
  500. # in scripts/kconfig to make the *config target
  501.  
  502. # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
  503. # KBUILD_DEFCONFIG may point out an alternative default configuration
  504. # used for 'make defconfig'
  505. include $(srctree)/arch/$(SRCARCH)/Makefile
  506. export KBUILD_DEFCONFIG KBUILD_KCONFIG
  507.  
  508. config: scripts_basic outputmakefile FORCE
  509.         $(Q)mkdir -p include/linux include/config
  510.         $(Q)$(MAKE) $(build)=scripts/kconfig $@
  511.  
  512. %config: scripts_basic outputmakefile FORCE
  513.         $(Q)mkdir -p include/linux include/config
  514.         $(Q)$(MAKE) $(build)=scripts/kconfig $@
  515.  
  516. else
  517. # ===========================================================================
  518. # Build targets only - this includes vmlinux, arch specific targets, clean
  519. # targets and others. In general all targets except *config targets.
  520.  
  521. ifeq ($(KBUILD_EXTMOD),)
  522. # Additional helpers built in scripts/
  523. # Carefully list dependencies so we do not try to build scripts twice
  524. # in parallel
  525. PHONY += scripts
  526. scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
  527.         $(Q)$(MAKE) $(build)=$(@)
  528.  
  529. # Objects we will link into vmlinux / subdirs we need to visit
  530. init-y          := init/
  531. drivers-y       := drivers/ sound/ firmware/ ubuntu/
  532. net-y           := net/
  533. libs-y          := lib/
  534. core-y          := usr/
  535. endif # KBUILD_EXTMOD
  536.  
  537. ifeq ($(dot-config),1)
  538. # Read in config
  539. -include include/config/auto.conf
  540.  
  541. ifeq ($(KBUILD_EXTMOD),)
  542. # Read in dependencies to all Kconfig* files, make sure to run
  543. # oldconfig if changes are detected.
  544. -include include/config/auto.conf.cmd
  545.  
  546. # To avoid any implicit rule to kick in, define an empty command
  547. $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
  548.  
  549. # If .config is newer than include/config/auto.conf, someone tinkered
  550. # with it and forgot to run make oldconfig.
  551. # if auto.conf.cmd is missing then we are probably in a cleaned tree so
  552. # we execute the config step to be sure to catch updated Kconfig files
  553. include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
  554.         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
  555. else
  556. # external modules needs include/generated/autoconf.h and include/config/auto.conf
  557. # but do not care if they are up-to-date. Use auto.conf to trigger the test
  558. PHONY += include/config/auto.conf
  559.  
  560. include/config/auto.conf:
  561.         $(Q)test -e include/generated/autoconf.h -a -e $@ || (          \
  562.         echo >&2;                                                       \
  563.         echo >&2 "  ERROR: Kernel configuration is invalid.";           \
  564.         echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
  565.         echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";      \
  566.         echo >&2 ;                                                      \
  567.         /bin/false)
  568.  
  569. endif # KBUILD_EXTMOD
  570.  
  571. else
  572. # Dummy target needed, because used as prerequisite
  573. include/config/auto.conf: ;
  574. endif # $(dot-config)
  575.  
  576. # The all: target is the default when no target is given on the
  577. # command line.
  578. # This allow a user to issue only 'make' to build a kernel including modules
  579. # Defaults to vmlinux, but the arch makefile usually adds further targets
  580. all: vmlinux
  581.  
  582. ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
  583. KBUILD_CFLAGS   += -Os
  584. else
  585. KBUILD_CFLAGS   += -O2
  586. endif
  587.  
  588. include $(srctree)/arch/$(SRCARCH)/Makefile
  589.  
  590. ifdef CONFIG_READABLE_ASM
  591. # Disable optimizations that make assembler listings hard to read.
  592. # reorder blocks reorders the control in the function
  593. # ipa clone creates specialized cloned functions
  594. # partial inlining inlines only parts of functions
  595. KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
  596.                  $(call cc-option,-fno-ipa-cp-clone,) \
  597.                  $(call cc-option,-fno-partial-inlining)
  598. endif
  599.  
  600. ifneq ($(CONFIG_FRAME_WARN),0)
  601. KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
  602. endif
  603.  
  604. # Force gcc to behave correct even for buggy distributions
  605. ifndef CONFIG_CC_STACKPROTECTOR
  606. KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
  607. endif
  608.  
  609. # This warning generated too much noise in a regular build.
  610. # Use make W=1 to enable this warning (see scripts/Makefile.build)
  611. KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
  612.  
  613. ifdef CONFIG_FRAME_POINTER
  614. KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
  615. else
  616. # Some targets (ARM with Thumb2, for example), can't be built with frame
  617. # pointers.  For those, we don't have FUNCTION_TRACER automatically
  618. # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
  619. # incompatible with -fomit-frame-pointer with current GCC, so we don't use
  620. # -fomit-frame-pointer with FUNCTION_TRACER.
  621. ifndef CONFIG_FUNCTION_TRACER
  622. KBUILD_CFLAGS   += -fomit-frame-pointer
  623. endif
  624. endif
  625.  
  626. ifdef CONFIG_DEBUG_INFO
  627. KBUILD_CFLAGS   += -g
  628. KBUILD_AFLAGS   += -gdwarf-2
  629. endif
  630.  
  631. ifdef CONFIG_DEBUG_INFO_REDUCED
  632. KBUILD_CFLAGS   += $(call cc-option, -femit-struct-debug-baseonly)
  633. endif
  634.  
  635. ifdef CONFIG_FUNCTION_TRACER
  636. ifdef CONFIG_HAVE_FENTRY
  637. CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
  638. endif
  639. KBUILD_CFLAGS   += -pg $(CC_USING_FENTRY)
  640. KBUILD_AFLAGS   += $(CC_USING_FENTRY)
  641. ifdef CONFIG_DYNAMIC_FTRACE
  642.         ifdef CONFIG_HAVE_C_RECORDMCOUNT
  643.                 BUILD_C_RECORDMCOUNT := y
  644.                 export BUILD_C_RECORDMCOUNT
  645.         endif
  646. endif
  647. endif
  648.  
  649. # We trigger additional mismatches with less inlining
  650. ifdef CONFIG_DEBUG_SECTION_MISMATCH
  651. KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
  652. endif
  653.  
  654. # arch Makefile may override CC so keep this after arch Makefile is included
  655. NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
  656. CHECKFLAGS     += $(NOSTDINC_FLAGS)
  657.  
  658. # warn about C99 declaration after statement
  659. KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
  660.  
  661. # disable pointer signed / unsigned warnings in gcc 4.0
  662. KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
  663.  
  664. # disable invalid "can't wrap" optimizations for signed / pointers
  665. KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
  666.  
  667. # conserve stack if available
  668. KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
  669.  
  670. # use the deterministic mode of AR if available
  671. KBUILD_ARFLAGS := $(call ar-option,D)
  672.  
  673. # check for 'asm goto'
  674. ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
  675.         KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
  676. endif
  677.  
  678. # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
  679. KBUILD_CPPFLAGS += $(KCPPFLAGS)
  680. KBUILD_AFLAGS += $(KAFLAGS)
  681. KBUILD_CFLAGS += $(KCFLAGS)
  682.  
  683. # Use --build-id when available.
  684. LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
  685.                               $(call cc-ldoption, -Wl$(comma)--build-id,))
  686. KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
  687. LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
  688.  
  689. ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
  690. LDFLAGS_vmlinux += $(call ld-option, -X,)
  691. endif
  692.  
  693. # Default kernel image to build when no specific target is given.
  694. # KBUILD_IMAGE may be overruled on the command line or
  695. # set in the environment
  696. # Also any assignments in arch/$(ARCH)/Makefile take precedence over
  697. # this default value
  698. export KBUILD_IMAGE ?= vmlinux
  699.  
  700. #
  701. # INSTALL_PATH specifies where to place the updated kernel and system map
  702. # images. Default is /boot, but you can set it to other values
  703. export  INSTALL_PATH ?= /boot
  704.  
  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.  
  711. MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
  712. export MODLIB
  713.  
  714. #
  715. #  INSTALL_MOD_STRIP, if defined, will cause modules to be
  716. #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
  717. #  the default option --strip-debug will be used.  Otherwise,
  718. #  INSTALL_MOD_STRIP value will be used as the options to the strip command.
  719.  
  720. ifdef INSTALL_MOD_STRIP
  721. ifeq ($(INSTALL_MOD_STRIP),1)
  722. mod_strip_cmd = $(STRIP) --strip-debug
  723. else
  724. mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
  725. endif # INSTALL_MOD_STRIP=1
  726. else
  727. mod_strip_cmd = true
  728. endif # INSTALL_MOD_STRIP
  729. export mod_strip_cmd
  730.  
  731.  
  732. ifeq ($(CONFIG_MODULE_SIG),y)
  733. MODSECKEY = ./signing_key.priv
  734. MODPUBKEY = ./signing_key.x509
  735. export MODPUBKEY
  736. mod_sign_cmd = perl $(srctree)/scripts/sign-file $(MODSECKEY) $(MODPUBKEY)
  737. else
  738. mod_sign_cmd = true
  739. endif
  740. export mod_sign_cmd
  741.  
  742.  
  743. ifeq ($(KBUILD_EXTMOD),)
  744. core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
  745.  
  746. vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
  747.                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
  748.                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
  749.  
  750. vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
  751.                      $(init-n) $(init-) \
  752.                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
  753.                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
  754.  
  755. init-y          := $(patsubst %/, %/built-in.o, $(init-y))
  756. core-y          := $(patsubst %/, %/built-in.o, $(core-y))
  757. drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
  758. net-y           := $(patsubst %/, %/built-in.o, $(net-y))
  759. libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
  760. libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
  761. libs-y          := $(libs-y1) $(libs-y2)
  762.  
  763. # Externally visible symbols (used by link-vmlinux.sh)
  764. export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
  765. export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
  766. export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
  767. export LDFLAGS_vmlinux
  768.  
  769. vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
  770.  
  771. # Final link of vmlinux
  772.       cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
  773. quiet_cmd_link-vmlinux = LINK    $@
  774.  
  775. # Include targets which we want to
  776. # execute if the rest of the kernel build went well.
  777. vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
  778. ifdef CONFIG_HEADERS_CHECK
  779.         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
  780. endif
  781. ifdef CONFIG_SAMPLES
  782.         $(Q)$(MAKE) $(build)=samples
  783. endif
  784. ifdef CONFIG_BUILD_DOCSRC
  785.         $(Q)$(MAKE) $(build)=Documentation
  786. endif
  787.         +$(call if_changed,link-vmlinux)
  788.  
  789. # The actual objects are generated when descending,
  790. # make sure no implicit rule kicks in
  791. $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
  792.  
  793. # Handle descending into subdirectories listed in $(vmlinux-dirs)
  794. # Preset locale variables to speed up the build process. Limit locale
  795. # tweaks to this spot to avoid wrong language settings when running
  796. # make menuconfig etc.
  797. # Error messages still appears in the original language
  798.  
  799. PHONY += $(vmlinux-dirs)
  800. $(vmlinux-dirs): prepare scripts
  801.         $(Q)$(MAKE) $(build)=$@
  802.  
  803. # Store (new) KERNELRELASE string in include/config/kernel.release
  804. include/config/kernel.release: include/config/auto.conf FORCE
  805.         $(Q)rm -f $@
  806.         $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
  807.  
  808.  
  809. # Things we need to do before we recursively start building the kernel
  810. # or the modules are listed in "prepare".
  811. # A multi level approach is used. prepareN is processed before prepareN-1.
  812. # archprepare is used in arch Makefiles and when processed asm symlink,
  813. # version.h and scripts_basic is processed / created.
  814.  
  815. # Listed in dependency order
  816. PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
  817.  
  818. # prepare3 is used to check if we are building in a separate output directory,
  819. # and if so do:
  820. # 1) Check that make has not been executed in the kernel src $(srctree)
  821. prepare3: include/config/kernel.release
  822. ifneq ($(KBUILD_SRC),)
  823.         @$(kecho) '  Using $(srctree) as source for kernel'
  824.         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
  825.                 echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
  826.                 echo >&2 "  in the '$(srctree)' directory.";\
  827.                 /bin/false; \
  828.         fi;
  829. endif
  830.  
  831. # prepare2 creates a makefile if using a separate output directory
  832. prepare2: prepare3 outputmakefile asm-generic
  833.  
  834. prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
  835.                    include/config/auto.conf
  836.         $(cmd_crmodverdir)
  837.  
  838. archprepare: archheaders archscripts prepare1 scripts_basic
  839.  
  840. prepare0: archprepare FORCE
  841.         $(Q)$(MAKE) $(build)=.
  842.  
  843. # All the preparing..
  844. prepare: prepare0
  845.  
  846. # Generate some files
  847. # ---------------------------------------------------------------------------
  848.  
  849. # KERNELRELEASE can change from a few different places, meaning version.h
  850. # needs to be updated, so this check is forced on all builds
  851.  
  852. uts_len := 64
  853. define filechk_utsrelease.h
  854.         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
  855.           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
  856.           exit 1;                                                         \
  857.         fi;                                                               \
  858.         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
  859. endef
  860.  
  861. define filechk_version.h
  862.         (echo \#define LINUX_VERSION_CODE $(shell                         \
  863.         expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
  864.         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
  865. endef
  866.  
  867. $(version_h): $(srctree)/Makefile FORCE
  868.         $(call filechk,version.h)
  869.  
  870. include/generated/utsrelease.h: include/config/kernel.release FORCE
  871.         $(call filechk,utsrelease.h)
  872.  
  873. PHONY += headerdep
  874. headerdep:
  875.         $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
  876.         $(srctree)/scripts/headerdep.pl -I$(srctree)/include
  877.  
  878. # ---------------------------------------------------------------------------
  879.  
  880. PHONY += depend dep
  881. depend dep:
  882.         @echo '*** Warning: make $@ is unnecessary now.'
  883.  
  884. # ---------------------------------------------------------------------------
  885. # Firmware install
  886. INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
  887. export INSTALL_FW_PATH
  888.  
  889. PHONY += firmware_install
  890. firmware_install: FORCE
  891.         @mkdir -p $(objtree)/firmware
  892.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
  893.  
  894. # ---------------------------------------------------------------------------
  895. # Kernel headers
  896.  
  897. #Default location for installed headers
  898. export INSTALL_HDR_PATH = $(objtree)/usr
  899.  
  900. hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
  901.  
  902. # If we do an all arch process set dst to asm-$(hdr-arch)
  903. hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
  904.  
  905. PHONY += archheaders
  906. archheaders:
  907.  
  908. PHONY += archscripts
  909. archscripts:
  910.  
  911. PHONY += __headers
  912. __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
  913.         $(Q)$(MAKE) $(build)=scripts build_unifdef
  914.  
  915. PHONY += headers_install_all
  916. headers_install_all:
  917.         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
  918.  
  919. PHONY += headers_install
  920. headers_install: __headers
  921.         $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
  922.           $(error Headers not exportable for the $(SRCARCH) architecture))
  923.         $(Q)$(MAKE) $(hdr-inst)=include/uapi
  924.         $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
  925.         $(Q)$(MAKE) $(hdr-inst)=ubuntu/include dst=include oldheaders=
  926.  
  927. PHONY += headers_check_all
  928. headers_check_all: headers_install_all
  929.         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
  930.  
  931. PHONY += headers_check
  932. headers_check: headers_install
  933.         $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
  934.         $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
  935.         $(Q)$(MAKE) $(hdr-inst)=ubuntu/include dst=include oldheaders= HDRCHECK=1
  936.  
  937. # ---------------------------------------------------------------------------
  938. # Modules
  939.  
  940. ifdef CONFIG_MODULES
  941.  
  942. # By default, build modules as well
  943.  
  944. all: modules
  945.  
  946. #       Build modules
  947. #
  948. #       A module can be listed more than once in obj-m resulting in
  949. #       duplicate lines in modules.order files.  Those are removed
  950. #       using awk while concatenating to the final file.
  951.  
  952. PHONY += modules
  953. modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
  954.         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
  955.         @$(kecho) '  Building modules, stage 2.';
  956.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  957.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
  958.  
  959. modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
  960.         $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
  961.  
  962. %/modules.builtin: include/config/auto.conf
  963.         $(Q)$(MAKE) $(modbuiltin)=$*
  964.  
  965.  
  966. # Target to prepare building external modules
  967. PHONY += modules_prepare
  968. modules_prepare: prepare scripts
  969.  
  970. # Target to install modules
  971. PHONY += modules_install
  972. modules_install: _modinst_ _modinst_post
  973.  
  974. PHONY += _modinst_
  975. _modinst_:
  976.         @rm -rf $(MODLIB)/kernel
  977.         @rm -f $(MODLIB)/source
  978.         @mkdir -p $(MODLIB)/kernel
  979.         @ln -s $(srctree) $(MODLIB)/source
  980.         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
  981.                 rm -f $(MODLIB)/build ; \
  982.                 ln -s $(objtree) $(MODLIB)/build ; \
  983.         fi
  984.         @cp -f $(objtree)/modules.order $(MODLIB)/
  985.         @cp -f $(objtree)/modules.builtin $(MODLIB)/
  986.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  987.  
  988. # This depmod is only for convenience to give the initial
  989. # boot a modules.dep even before / is mounted read-write.  However the
  990. # boot script depmod is the master version.
  991. PHONY += _modinst_post
  992. _modinst_post: _modinst_
  993.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
  994.         $(call cmd,depmod)
  995.  
  996. ifeq ($(CONFIG_MODULE_SIG), y)
  997. PHONY += modules_sign
  998. modules_sign:
  999.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
  1000. endif
  1001.  
  1002. else # CONFIG_MODULES
  1003.  
  1004. # Modules not configured
  1005. # ---------------------------------------------------------------------------
  1006.  
  1007. modules modules_install: FORCE
  1008.         @echo >&2
  1009.         @echo >&2 "The present kernel configuration has modules disabled."
  1010.         @echo >&2 "Type 'make config' and enable loadable module support."
  1011.         @echo >&2 "Then build a kernel with module support enabled."
  1012.         @echo >&2
  1013.         @exit 1
  1014.  
  1015. endif # CONFIG_MODULES
  1016.  
  1017. ###
  1018. # Cleaning is done on three levels.
  1019. # make clean     Delete most generated files
  1020. #                Leave enough to build external modules
  1021. # make mrproper  Delete the current configuration, and all generated files
  1022. # make distclean Remove editor backup files, patch leftover files and the like
  1023.  
  1024. # Directories & files removed with 'make clean'
  1025. CLEAN_DIRS  += $(MODVERDIR)
  1026.  
  1027. # Directories & files removed with 'make mrproper'
  1028. MRPROPER_DIRS  += include/config usr/include include/generated          \
  1029.                   arch/*/include/generated
  1030. MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
  1031.                   Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
  1032.                   signing_key.priv signing_key.x509 x509.genkey         \
  1033.                   extra_certificates signing_key.x509.keyid             \
  1034.                   signing_key.x509.signer
  1035.  
  1036. # clean - Delete most, but leave enough to build external modules
  1037. #
  1038. clean: rm-dirs  := $(CLEAN_DIRS)
  1039. clean: rm-files := $(CLEAN_FILES)
  1040. clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
  1041.  
  1042. PHONY += $(clean-dirs) clean archclean vmlinuxclean
  1043. $(clean-dirs):
  1044.         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1045.  
  1046. vmlinuxclean:
  1047.         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
  1048.  
  1049. clean: archclean vmlinuxclean
  1050.  
  1051. # mrproper - Delete all generated files, including .config
  1052. #
  1053. mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
  1054. mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
  1055. mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
  1056.  
  1057. PHONY += $(mrproper-dirs) mrproper archmrproper
  1058. $(mrproper-dirs):
  1059.         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
  1060.  
  1061. mrproper: clean archmrproper $(mrproper-dirs)
  1062.         $(call cmd,rmdirs)
  1063.         $(call cmd,rmfiles)
  1064.  
  1065. # distclean
  1066. #
  1067. PHONY += distclean
  1068.  
  1069. distclean: mrproper
  1070.         @find $(srctree) $(RCS_FIND_IGNORE) \
  1071.                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
  1072.                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
  1073.                 -o -name '.*.rej' \
  1074.                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
  1075.                 -type f -print | xargs rm -f
  1076.  
  1077.  
  1078. # Packaging of the kernel to various formats
  1079. # ---------------------------------------------------------------------------
  1080. # rpm target kept for backward compatibility
  1081. package-dir     := $(srctree)/scripts/package
  1082.  
  1083. %src-pkg: FORCE
  1084.         $(Q)$(MAKE) $(build)=$(package-dir) $@
  1085. %pkg: include/config/kernel.release FORCE
  1086.         $(Q)$(MAKE) $(build)=$(package-dir) $@
  1087. rpm: include/config/kernel.release FORCE
  1088.         $(Q)$(MAKE) $(build)=$(package-dir) $@
  1089.  
  1090.  
  1091. # Brief documentation of the typical targets used
  1092. # ---------------------------------------------------------------------------
  1093.  
  1094. boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
  1095. boards := $(notdir $(boards))
  1096. board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
  1097. board-dirs := $(sort $(notdir $(board-dirs:/=)))
  1098.  
  1099. help:
  1100.         @echo  'Cleaning targets:'
  1101.         @echo  '  clean           - Remove most generated files but keep the config and'
  1102.         @echo  '                    enough build support to build external modules'
  1103.         @echo  '  mrproper        - Remove all generated files + config + various backup files'
  1104.         @echo  '  distclean       - mrproper + remove editor backup and patch files'
  1105.         @echo  ''
  1106.         @echo  'Configuration targets:'
  1107.         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
  1108.         @echo  ''
  1109.         @echo  'Other generic targets:'
  1110.         @echo  '  all             - Build all targets marked with [*]'
  1111.         @echo  '* vmlinux         - Build the bare kernel'
  1112.         @echo  '* modules         - Build all modules'
  1113.         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
  1114.         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
  1115.         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
  1116.         @echo  '  dir/            - Build all files in dir and below'
  1117.         @echo  '  dir/file.[oisS] - Build specified target only'
  1118.         @echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
  1119.         @echo  '                    (requires a recent binutils and recent build (System.map))'
  1120.         @echo  '  dir/file.ko     - Build module including final link'
  1121.         @echo  '  modules_prepare - Set up for building external modules'
  1122.         @echo  '  tags/TAGS       - Generate tags file for editors'
  1123.         @echo  '  cscope          - Generate cscope index'
  1124.         @echo  '  gtags           - Generate GNU GLOBAL index'
  1125.         @echo  '  kernelrelease   - Output the release version string'
  1126.         @echo  '  kernelversion   - Output the version stored in Makefile'
  1127.         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
  1128.          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
  1129.          echo  ''
  1130.         @echo  'Static analysers'
  1131.         @echo  '  checkstack      - Generate a list of stack hogs'
  1132.         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
  1133.         @echo  '  versioncheck    - Sanity check on version.h usage'
  1134.         @echo  '  includecheck    - Check for duplicate included header files'
  1135.         @echo  '  export_report   - List the usages of all exported symbols'
  1136.         @echo  '  headers_check   - Sanity check on exported headers'
  1137.         @echo  '  headerdep       - Detect inclusion cycles in headers'
  1138.         @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
  1139.         @echo  ''
  1140.         @echo  'Kernel packaging:'
  1141.         @$(MAKE) $(build)=$(package-dir) help
  1142.         @echo  ''
  1143.         @echo  'Documentation targets:'
  1144.         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
  1145.         @echo  ''
  1146.         @echo  'Architecture specific targets ($(SRCARCH)):'
  1147.         @$(if $(archhelp),$(archhelp),\
  1148.                 echo '  No architecture specific help defined for $(SRCARCH)')
  1149.         @echo  ''
  1150.         @$(if $(boards), \
  1151.                 $(foreach b, $(boards), \
  1152.                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
  1153.                 echo '')
  1154.         @$(if $(board-dirs), \
  1155.                 $(foreach b, $(board-dirs), \
  1156.                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
  1157.                 printf "  %-16s - Show all of the above\\n" help-boards; \
  1158.                 echo '')
  1159.  
  1160.         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
  1161.         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
  1162.         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
  1163.         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
  1164.         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
  1165.         @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
  1166.         @echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
  1167.         @echo  '                1: warnings which may be relevant and do not occur too often'
  1168.         @echo  '                2: warnings which occur quite often but may still be relevant'
  1169.         @echo  '                3: more obscure warnings, can most likely be ignored'
  1170.         @echo  '                Multiple levels can be combined with W=12 or W=123'
  1171.         @echo  ''
  1172.         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
  1173.         @echo  'For further info see the ./README file'
  1174.  
  1175.  
  1176. help-board-dirs := $(addprefix help-,$(board-dirs))
  1177.  
  1178. help-boards: $(help-board-dirs)
  1179.  
  1180. boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
  1181.  
  1182. $(help-board-dirs): help-%:
  1183.         @echo  'Architecture specific targets ($(SRCARCH) $*):'
  1184.         @$(if $(boards-per-dir), \
  1185.                 $(foreach b, $(boards-per-dir), \
  1186.                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
  1187.                 echo '')
  1188.  
  1189.  
  1190. # Documentation targets
  1191. # ---------------------------------------------------------------------------
  1192. %docs: scripts_basic FORCE
  1193.         $(Q)$(MAKE) $(build)=scripts build_docproc
  1194.         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
  1195.  
  1196. else # KBUILD_EXTMOD
  1197.  
  1198. ###
  1199. # External module support.
  1200. # When building external modules the kernel used as basis is considered
  1201. # read-only, and no consistency checks are made and the make
  1202. # system is not used on the basis kernel. If updates are required
  1203. # in the basis kernel ordinary make commands (without M=...) must
  1204. # be used.
  1205. #
  1206. # The following are the only valid targets when building external
  1207. # modules.
  1208. # make M=dir clean     Delete all automatically generated files
  1209. # make M=dir modules   Make all modules in specified dir
  1210. # make M=dir           Same as 'make M=dir modules'
  1211. # make M=dir modules_install
  1212. #                      Install the modules built in the module directory
  1213. #                      Assumes install directory is already created
  1214.  
  1215. # We are always building modules
  1216. KBUILD_MODULES := 1
  1217. PHONY += crmodverdir
  1218. crmodverdir:
  1219.         $(cmd_crmodverdir)
  1220.  
  1221. PHONY += $(objtree)/Module.symvers
  1222. $(objtree)/Module.symvers:
  1223.         @test -e $(objtree)/Module.symvers || ( \
  1224.         echo; \
  1225.         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
  1226.         echo "           is missing; modules will have no dependencies and modversions."; \
  1227.         echo )
  1228.  
  1229. module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
  1230. PHONY += $(module-dirs) modules
  1231. $(module-dirs): crmodverdir $(objtree)/Module.symvers
  1232.         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
  1233.  
  1234. modules: $(module-dirs)
  1235.         @$(kecho) '  Building modules, stage 2.';
  1236.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1237.  
  1238. PHONY += modules_install
  1239. modules_install: _emodinst_ _emodinst_post
  1240.  
  1241. install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
  1242. PHONY += _emodinst_
  1243. _emodinst_:
  1244.         $(Q)mkdir -p $(MODLIB)/$(install-dir)
  1245.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
  1246.  
  1247. PHONY += _emodinst_post
  1248. _emodinst_post: _emodinst_
  1249.         $(call cmd,depmod)
  1250.  
  1251. clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
  1252.  
  1253. PHONY += $(clean-dirs) clean
  1254. $(clean-dirs):
  1255.         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
  1256.  
  1257. clean:  rm-dirs := $(MODVERDIR)
  1258. clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
  1259.  
  1260. help:
  1261.         @echo  '  Building external modules.'
  1262.         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
  1263.         @echo  ''
  1264.         @echo  '  modules         - default target, build the module(s)'
  1265.         @echo  '  modules_install - install the module'
  1266.         @echo  '  clean           - remove generated files in module directory only'
  1267.         @echo  ''
  1268.  
  1269. # Dummies...
  1270. PHONY += prepare scripts
  1271. prepare: ;
  1272. scripts: ;
  1273. endif # KBUILD_EXTMOD
  1274.  
  1275. clean: $(clean-dirs)
  1276.         $(call cmd,rmdirs)
  1277.         $(call cmd,rmfiles)
  1278.         @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
  1279.                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
  1280.                 -o -name '*.ko.*' \
  1281.                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
  1282.                 -o -name '*.symtypes' -o -name 'modules.order' \
  1283.                 -o -name modules.builtin -o -name '.tmp_*.o.*' \
  1284.                 -o -name '*.gcno' \) -type f -print | xargs rm -f
  1285.  
  1286. # Generate tags for editors
  1287. # ---------------------------------------------------------------------------
  1288. quiet_cmd_tags = GEN     $@
  1289.       cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
  1290.  
  1291. tags TAGS cscope gtags: FORCE
  1292.         $(call cmd,tags)
  1293.  
  1294. # Scripts to check various things for consistency
  1295. # ---------------------------------------------------------------------------
  1296.  
  1297. PHONY += includecheck versioncheck coccicheck namespacecheck export_report
  1298.  
  1299. includecheck:
  1300.         find $(srctree)/* $(RCS_FIND_IGNORE) \
  1301.                 -name '*.[hcS]' -type f -print | sort \
  1302.                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
  1303.  
  1304. versioncheck:
  1305.         find $(srctree)/* $(RCS_FIND_IGNORE) \
  1306.                 -name '*.[hcS]' -type f -print | sort \
  1307.                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
  1308.  
  1309. coccicheck:
  1310.         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
  1311.  
  1312. namespacecheck:
  1313.         $(PERL) $(srctree)/scripts/namespace.pl
  1314.  
  1315. export_report:
  1316.         $(PERL) $(srctree)/scripts/export_report.pl
  1317.  
  1318. endif #ifeq ($(config-targets),1)
  1319. endif #ifeq ($(mixed-targets),1)
  1320.  
  1321. PHONY += checkstack kernelrelease kernelversion
  1322.  
  1323. # UML needs a little special treatment here.  It wants to use the host
  1324. # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
  1325. # else wants $(ARCH), including people doing cross-builds, which means
  1326. # that $(SUBARCH) doesn't work here.
  1327. ifeq ($(ARCH), um)
  1328. CHECKSTACK_ARCH := $(SUBARCH)
  1329. else
  1330. CHECKSTACK_ARCH := $(ARCH)
  1331. endif
  1332. checkstack:
  1333.         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
  1334.         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
  1335.  
  1336. kernelrelease:
  1337.         @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
  1338.  
  1339. kernelversion:
  1340.         @echo $(KERNELVERSION)
  1341.  
  1342. # Clear a bunch of variables before executing the submake
  1343. tools/: FORCE
  1344.         $(Q)mkdir -p $(objtree)/tools
  1345.         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/
  1346.  
  1347. tools/%: FORCE
  1348.         $(Q)mkdir -p $(objtree)/tools
  1349.         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ $*
  1350.  
  1351. # Single targets
  1352. # ---------------------------------------------------------------------------
  1353. # Single targets are compatible with:
  1354. # - build with mixed source and output
  1355. # - build with separate output dir 'make O=...'
  1356. # - external modules
  1357. #
  1358. #  target-dir => where to store outputfile
  1359. #  build-dir  => directory in kernel source tree to use
  1360.  
  1361. ifeq ($(KBUILD_EXTMOD),)
  1362.         build-dir  = $(patsubst %/,%,$(dir $@))
  1363.         target-dir = $(dir $@)
  1364. else
  1365.         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
  1366.         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
  1367.         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
  1368. endif
  1369.  
  1370. %.s: %.c prepare scripts FORCE
  1371.         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1372. %.i: %.c prepare scripts FORCE
  1373.         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1374. %.o: %.c prepare scripts FORCE
  1375.         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1376. %.lst: %.c prepare scripts FORCE
  1377.         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1378. %.s: %.S prepare scripts FORCE
  1379.         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1380. %.o: %.S prepare scripts FORCE
  1381.         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1382. %.symtypes: %.c prepare scripts FORCE
  1383.         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
  1384.  
  1385. # Modules
  1386. /: prepare scripts FORCE
  1387.         $(cmd_crmodverdir)
  1388.         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1389.         $(build)=$(build-dir)
  1390. %/: prepare scripts FORCE
  1391.         $(cmd_crmodverdir)
  1392.         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
  1393.         $(build)=$(build-dir)
  1394. %.ko: prepare scripts FORCE
  1395.         $(cmd_crmodverdir)
  1396.         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
  1397.         $(build)=$(build-dir) $(@:.ko=.o)
  1398.         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
  1399.  
  1400. # FIXME Should go into a make.lib or something
  1401. # ===========================================================================
  1402.  
  1403. quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
  1404.       cmd_rmdirs = rm -rf $(rm-dirs)
  1405.  
  1406. quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
  1407.       cmd_rmfiles = rm -f $(rm-files)
  1408.  
  1409. # Run depmod only if we have System.map and depmod is executable
  1410. quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
  1411.       cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
  1412.                    $(KERNELRELEASE)
  1413.  
  1414. # Create temporary dir for module support files
  1415. # clean it up only when building all modules
  1416. cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
  1417.                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
  1418.  
  1419. # read all saved command lines
  1420.  
  1421. targets := $(wildcard $(sort $(targets)))
  1422. cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  1423.  
  1424. ifneq ($(cmd_files),)
  1425.   $(cmd_files): ;       # Do not try to update included dependency files
  1426.   include $(cmd_files)
  1427. endif
  1428.  
  1429. # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
  1430. # Usage:
  1431. # $(Q)$(MAKE) $(clean)=dir
  1432. clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
  1433.  
  1434. endif   # skip-makefile
  1435.  
  1436. PHONY += FORCE
  1437. FORCE:
  1438.  
  1439. # Declare the contents of the .PHONY variable as phony.  We keep that
  1440. # information in a variable so we can use it in if_changed and friends.
  1441. .PHONY: $(PHONY)