Makefile

   1 VERSION = 3
   2 PATCHLEVEL = 10
   3 SUBLEVEL = 54
   4 EXTRAVERSION =
   5 NAME = TOSSUG Baby Fish
   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/x86/ -e s/x86_64/x86/ \
 169                                   -e s/sun4u/sparc64/ \
 170                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 171                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 172                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
 173                                   -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
 174
 175 # Cross compiling and selecting different set of gcc/bin-utils
 176 # ---------------------------------------------------------------------------
 177 #
 178 # When performing cross compilation for other architectures ARCH shall be set
 179 # to the target architecture. (See arch/* for the possibilities).
 180 # ARCH can be set during invocation of make:
 181 # make ARCH=ia64
 182 # Another way is to have ARCH set in the environment.
 183 # The default ARCH is the host where make is executed.
 184
 185 # CROSS_COMPILE specify the prefix used for all executables used
 186 # during compilation. Only gcc and related bin-utils executables
 187 # are prefixed with $(CROSS_COMPILE).
 188 # CROSS_COMPILE can be set on the command line
 189 # make CROSS_COMPILE=ia64-linux-
 190 # Alternatively CROSS_COMPILE can be set in the environment.
 191 # A third alternative is to store a setting in .config so that plain
 192 # "make" in the configured kernel build directory always uses that.
 193 # Default value for CROSS_COMPILE is not to prefix executables
 194 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 195 #ARCH           ?= $(SUBARCH)
 196 #CROSS_COMPILE  ?= $(CONFIG_CROSS_COMPILE:"%"=%)
 197 ifeq ($(TARGET_ARCH), arm)
 198 ARCH            ?= arm
 199 CROSS_COMPILE   ?= arm-eabi-
 200 else
 201 ARCH            ?= arm64
 202 CROSS_COMPILE   ?= aarch64-linux-android-
 203 endif
 204
 205 # Architecture as present in compile.h
 206 UTS_MACHINE     := $(ARCH)
 207 SRCARCH         := $(ARCH)
 208
 209 # Additional ARCH settings for x86
 210 ifeq ($(ARCH),i386)
 211         SRCARCH := x86
 212 endif
 213 ifeq ($(ARCH),x86_64)
 214         SRCARCH := x86
 215 endif
 216
 217 # Additional ARCH settings for sparc
 218 ifeq ($(ARCH),sparc32)
 219        SRCARCH := sparc
 220 endif
 221 ifeq ($(ARCH),sparc64)
 222        SRCARCH := sparc
 223 endif
 224
 225 # Additional ARCH settings for sh
 226 ifeq ($(ARCH),sh64)
 227        SRCARCH := sh
 228 endif
 229
 230 # Additional ARCH settings for tile
 231 ifeq ($(ARCH),tilepro)
 232        SRCARCH := tile
 233 endif
 234 ifeq ($(ARCH),tilegx)
 235        SRCARCH := tile
 236 endif
 237
 238 # Where to locate arch specific headers
 239 hdr-arch  := $(SRCARCH)
 240
 241 KCONFIG_CONFIG  ?= .config
 242 export KCONFIG_CONFIG
 243
 244 # SHELL used by kbuild
 245 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 246           else if [ -x /bin/bash ]; then echo /bin/bash; \
 247           else echo sh; fi ; fi)
 248
 249 HOSTCC       = gcc
 250 HOSTCXX      = g++
 251 HOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
 252 HOSTCXXFLAGS = -O2
 253
 254 # Decide whether to build built-in, modular, or both.
 255 # Normally, just do built-in.
 256
 257 KBUILD_MODULES :=
 258 KBUILD_BUILTIN := 1
 259
 260 #       If we have only "make modules", don't compile built-in objects.
 261 #       When we're building modules with modversions, we need to consider
 262 #       the built-in objects during the descend as well, in order to
 263 #       make sure the checksums are up to date before we record them.
 264
 265 ifeq ($(MAKECMDGOALS),modules)
 266   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 267 endif
 268
 269 #       If we have "make <whatever> modules", compile modules
 270 #       in addition to whatever we do anyway.
 271 #       Just "make" or "make all" shall build modules as well
 272
 273 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 274   KBUILD_MODULES := 1
 275 endif
 276
 277 ifeq ($(MAKECMDGOALS),)
 278   KBUILD_MODULES := 1
 279 endif
 280
 281 export KBUILD_MODULES KBUILD_BUILTIN
 282 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 283
 284 # Beautify output
 285 # ---------------------------------------------------------------------------
 286 #
 287 # Normally, we echo the whole command before executing it. By making
 288 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 289 # $(quiet) to choose other forms of output instead, e.g.
 290 #
 291 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 292 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 293 #
 294 # If $(quiet) is empty, the whole command will be printed.
 295 # If it is set to "quiet_", only the short version will be printed.
 296 # If it is set to "silent_", nothing will be printed at all, since
 297 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 298 #
 299 # A simple variant is to prefix commands with $(Q) - that's useful
 300 # for commands that shall be hidden in non-verbose mode.
 301 #
 302 #       $(Q)ln $@ :<
 303 #
 304 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 305 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 306
 307 ifeq ($(KBUILD_VERBOSE),1)
 308   quiet =
 309   Q =
 310 else
 311   quiet=quiet_
 312   Q = @
 313 endif
 314
 315 # If the user is running make -s (silent mode), suppress echoing of
 316 # commands
 317
 318 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
 319   quiet=silent_
 320 endif
 321
 322 export quiet Q KBUILD_VERBOSE
 323
 324
 325 # Look for make include files relative to root of kernel src
 326 MAKEFLAGS += --include-dir=$(srctree)
 327
 328 # We need some generic definitions (do not try to remake the file).
 329 $(srctree)/scripts/Kbuild.include: ;
 330 include $(srctree)/scripts/Kbuild.include
 331
 332 # Make variables (CC, etc...)
 333
 334 AS              = $(CROSS_COMPILE)as
 335 LD              = $(CROSS_COMPILE)ld
 336 CC              = $(CROSS_COMPILE)gcc
 337 CPP             = $(CC) -E
 338 AR              = $(CROSS_COMPILE)ar
 339 NM              = $(CROSS_COMPILE)nm
 340 STRIP           = $(CROSS_COMPILE)strip
 341 OBJCOPY         = $(CROSS_COMPILE)objcopy
 342 OBJDUMP         = $(CROSS_COMPILE)objdump
 343 AWK             = awk
 344 GENKSYMS        = scripts/genksyms/genksyms
 345 INSTALLKERNEL  := installkernel
 346 DEPMOD          = /sbin/depmod
 347 PERL            = perl
 348 CHECK           = sparse
 349
 350 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
 351                   -Wbitwise -Wno-return-void $(CF)
 352 CFLAGS_MODULE   =
 353 AFLAGS_MODULE   =
 354 LDFLAGS_MODULE  =
 355 CFLAGS_KERNEL   =
 356 AFLAGS_KERNEL   =
 357 CFLAGS_GCOV     = -fprofile-arcs -ftest-coverage
 358
 359
 360 # Use USERINCLUDE when you must reference the UAPI directories only.
 361 USERINCLUDE    := \
 362                 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
 363                 -Iarch/$(hdr-arch)/include/generated/uapi \
 364                 -I$(srctree)/include/uapi \
 365                 -Iinclude/generated/uapi \
 366                 -include $(srctree)/include/linux/kconfig.h
 367
 368 # Use LINUXINCLUDE when you must reference the include/ directory.
 369 # Needed to be compatible with the O= option
 370 LINUXINCLUDE    := \
 371                 -I$(srctree)/arch/$(hdr-arch)/include \
 372                 -Iarch/$(hdr-arch)/include/generated \
 373                 $(if $(KBUILD_SRC), -I$(srctree)/include) \
 374                 -Iinclude \
 375                 $(USERINCLUDE)
 376
 377 KBUILD_CPPFLAGS := -D__KERNEL__
 378
 379 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 380                    -fno-strict-aliasing -fno-common \
 381                    -Werror-implicit-function-declaration \
 382                    -Wno-format-security \
 383                    -fno-delete-null-pointer-checks \
 384                    -Werror=format -Werror=int-to-pointer-cast -Werror=pointer-to-int-cast
 385
 386 KBUILD_AFLAGS_KERNEL :=
 387 KBUILD_CFLAGS_KERNEL :=
 388 KBUILD_AFLAGS   := -D__ASSEMBLY__
 389 KBUILD_AFLAGS_MODULE  := -DMODULE
 390 KBUILD_CFLAGS_MODULE  := -DMODULE
 391 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
 392
 393 -include $(srctree)/$(MTK_PROJECT)_mtk_cust.mak
 394 #MTK_INC += -I$(MTK_ROOT_CUSTOM)/$(MTK_PROJECT)/common
 395 LINUXINCLUDE    += $(MTK_INC)
 396 KBUILD_CFLAGS   += $(MTK_CFLAGS) $(MTK_CDEFS) -fno-pic
 397 KBUILD_CPPFLAGS += $(MTK_CPPFLAGS) $(MTK_CPPDEFS)
 398 KBUILD_AFLAGS   += $(MTK_AFLAGS) $(MTK_ADEFS)
 399
 400 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 401 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 402 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
 403
 404 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 405 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 406 export CPP AR NM STRIP OBJCOPY OBJDUMP
 407 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
 408 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 409
 410 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 411 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
 412 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 413 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
 414 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
 415 export KBUILD_ARFLAGS
 416
 417 # When compiling out-of-tree modules, put MODVERDIR in the module
 418 # tree rather than in the kernel tree. The kernel tree might
 419 # even be read-only.
 420 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 421
 422 # Files to ignore in find ... statements
 423
 424 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
 425                    -o -name .pc -o -name .hg -o -name .git \) -prune -o
 426 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
 427                          --exclude CVS --exclude .pc --exclude .hg --exclude .git
 428
 429 # ===========================================================================
 430 # Rules shared between *config targets and build targets
 431
 432 # Basic helpers built in scripts/
 433 PHONY += scripts_basic
 434 scripts_basic:
 435         $(Q)$(MAKE) $(build)=scripts/basic
 436         $(Q)rm -f .tmp_quiet_recordmcount
 437
 438 # To avoid any implicit rule to kick in, define an empty command.
 439 scripts/basic/%: scripts_basic ;
 440
 441 PHONY += outputmakefile
 442 # outputmakefile generates a Makefile in the output directory, if using a
 443 # separate output directory. This allows convenient use of make in the
 444 # output directory.
 445 outputmakefile:
 446 ifneq ($(KBUILD_SRC),)
 447         $(Q)ln -fsn $(srctree) source
 448         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 449             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 450 endif
 451
 452 # Support for using generic headers in asm-generic
 453 PHONY += asm-generic
 454 asm-generic:
 455         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
 456                     src=asm obj=arch/$(SRCARCH)/include/generated/asm
 457         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
 458                     src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
 459
 460 # To make sure we do not include .config for any of the *config targets
 461 # catch them early, and hand them over to scripts/kconfig/Makefile
 462 # It is allowed to specify more targets when calling make, including
 463 # mixing *config targets and build targets.
 464 # For example 'make oldconfig all'.
 465 # Detect when mixed targets is specified, and make a second invocation
 466 # of make so .config is not included in this case either (for *config).
 467
 468 version_h := include/generated/uapi/linux/version.h
 469
 470 no-dot-config-targets := clean mrproper distclean \
 471                          cscope gtags TAGS tags help %docs check% coccicheck \
 472                          $(version_h) headers_% archheaders archscripts \
 473                          kernelversion %src-pkg
 474
 475 config-targets := 0
 476 mixed-targets  := 0
 477 dot-config     := 1
 478
 479 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 480         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 481                 dot-config := 0
 482         endif
 483 endif
 484
 485 ifeq ($(KBUILD_EXTMOD),)
 486         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 487                 config-targets := 1
 488                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 489                         mixed-targets := 1
 490                 endif
 491         endif
 492 endif
 493
 494 ifeq ($(mixed-targets),1)
 495 # ===========================================================================
 496 # We're called with mixed targets (*config and build targets).
 497 # Handle them one by one.
 498
 499 %:: FORCE
 500         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 501
 502 else
 503 ifeq ($(config-targets),1)
 504 # ===========================================================================
 505 # *config targets only - make sure prerequisites are updated, and descend
 506 # in scripts/kconfig to make the *config target
 507
 508 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 509 # KBUILD_DEFCONFIG may point out an alternative default configuration
 510 # used for 'make defconfig'
 511 include $(srctree)/arch/$(SRCARCH)/Makefile
 512 export KBUILD_DEFCONFIG KBUILD_KCONFIG
 513
 514 config: scripts_basic outputmakefile FORCE
 515         $(Q)mkdir -p include/linux include/config
 516         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 517
 518 %config: scripts_basic outputmakefile FORCE
 519         $(Q)mkdir -p include/linux include/config
 520         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 521
 522 else
 523 # ===========================================================================
 524 # Build targets only - this includes vmlinux, arch specific targets, clean
 525 # targets and others. In general all targets except *config targets.
 526
 527 ifeq ($(KBUILD_EXTMOD),)
 528 # Additional helpers built in scripts/
 529 # Carefully list dependencies so we do not try to build scripts twice
 530 # in parallel
 531 PHONY += scripts
 532 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
 533          asm-generic
 534         $(Q)$(MAKE) $(build)=$(@)
 535
 536 # Objects we will link into vmlinux / subdirs we need to visit
 537 init-y          := init/
 538 drivers-y       := drivers/ sound/ firmware/
 539 net-y           := net/
 540 libs-y          := lib/
 541 core-y          := usr/
 542 endif # KBUILD_EXTMOD
 543
 544 ifeq ($(dot-config),1)
 545 # Read in config
 546 -include include/config/auto.conf
 547
 548 ifeq ($(KBUILD_EXTMOD),)
 549 # Read in dependencies to all Kconfig* files, make sure to run
 550 # oldconfig if changes are detected.
 551 -include include/config/auto.conf.cmd
 552
 553 # To avoid any implicit rule to kick in, define an empty command
 554 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 555
 556 # If .config is newer than include/config/auto.conf, someone tinkered
 557 # with it and forgot to run make oldconfig.
 558 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 559 # we execute the config step to be sure to catch updated Kconfig files
 560 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 561         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 562 else
 563 # external modules needs include/generated/autoconf.h and include/config/auto.conf
 564 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 565 PHONY += include/config/auto.conf
 566
 567 include/config/auto.conf:
 568         $(Q)test -e include/generated/autoconf.h -a -e $@ || (          \
 569         echo >&2;                                                       \
 570         echo >&2 "  ERROR: Kernel configuration is invalid.";           \
 571         echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
 572         echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";      \
 573         echo >&2 ;                                                      \
 574         /bin/false)
 575
 576 endif # KBUILD_EXTMOD
 577
 578 else
 579 # Dummy target needed, because used as prerequisite
 580 include/config/auto.conf: ;
 581 endif # $(dot-config)
 582
 583 # The all: target is the default when no target is given on the
 584 # command line.
 585 # This allow a user to issue only 'make' to build a kernel including modules
 586 # Defaults to vmlinux, but the arch makefile usually adds further targets
 587 all: vmlinux
 588
 589 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 590 KBUILD_CFLAGS   += -Os $(call cc-disable-warning,maybe-uninitialized,)
 591 else
 592 KBUILD_CFLAGS   += -O2
 593 endif
 594
 595 include $(srctree)/arch/$(SRCARCH)/Makefile
 596
 597 ifdef CONFIG_READABLE_ASM
 598 # Disable optimizations that make assembler listings hard to read.
 599 # reorder blocks reorders the control in the function
 600 # ipa clone creates specialized cloned functions
 601 # partial inlining inlines only parts of functions
 602 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
 603                  $(call cc-option,-fno-ipa-cp-clone,) \
 604                  $(call cc-option,-fno-partial-inlining)
 605 endif
 606
 607 ifneq ($(CONFIG_FRAME_WARN),0)
 608 KBUILD_CFLAGS += $(call cc-option,-Werror=frame-larger-than=1)
 609 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 610 endif
 611
 612 # Force gcc to behave correct even for buggy distributions
 613 ifndef CONFIG_CC_STACKPROTECTOR
 614 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
 615 endif
 616
 617 # This warning generated too much noise in a regular build.
 618 # Use make W=1 to enable this warning (see scripts/Makefile.build)
 619 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
 620
 621 ifdef CONFIG_FRAME_POINTER
 622 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
 623 else
 624 # Some targets (ARM with Thumb2, for example), can't be built with frame
 625 # pointers.  For those, we don't have FUNCTION_TRACER automatically
 626 # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
 627 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
 628 # -fomit-frame-pointer with FUNCTION_TRACER.
 629 ifndef CONFIG_FUNCTION_TRACER
 630 KBUILD_CFLAGS   += -fomit-frame-pointer
 631 endif
 632 endif
 633
 634 KBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
 635
 636 ifdef CONFIG_DEBUG_INFO
 637 KBUILD_CFLAGS   += -g
 638 KBUILD_AFLAGS   += -gdwarf-2
 639 endif
 640
 641 ifdef CONFIG_DEBUG_INFO_REDUCED
 642 KBUILD_CFLAGS   += $(call cc-option, -femit-struct-debug-baseonly) \
 643                    $(call cc-option,-fno-var-tracking)
 644 endif
 645
 646 ifdef CONFIG_FUNCTION_TRACER
 647 ifdef CONFIG_HAVE_FENTRY
 648 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
 649 endif
 650 KBUILD_CFLAGS   += -pg $(CC_USING_FENTRY)
 651 KBUILD_AFLAGS   += $(CC_USING_FENTRY)
 652 ifdef CONFIG_DYNAMIC_FTRACE
 653         ifdef CONFIG_HAVE_C_RECORDMCOUNT
 654                 BUILD_C_RECORDMCOUNT := y
 655                 export BUILD_C_RECORDMCOUNT
 656         endif
 657 endif
 658 endif
 659
 660 # We trigger additional mismatches with less inlining
 661 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 662 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
 663 endif
 664
 665 # arch Makefile may override CC so keep this after arch Makefile is included
 666 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 667 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 668
 669 # warn about C99 declaration after statement
 670 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 671
 672 # disable pointer signed / unsigned warnings in gcc 4.0
 673 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
 674
 675 # disable invalid "can't wrap" optimizations for signed / pointers
 676 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
 677
 678 # conserve stack if available
 679 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
 680
 681 # use the deterministic mode of AR if available
 682 KBUILD_ARFLAGS := $(call ar-option,D)
 683
 684 # check for 'asm goto'
 685 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
 686         KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
 687 endif
 688
 689 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
 690 KBUILD_CPPFLAGS += $(KCPPFLAGS)
 691 KBUILD_AFLAGS += $(KAFLAGS)
 692 KBUILD_CFLAGS += $(KCFLAGS)
 693
 694 # Use --build-id when available.
 695 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 696                               $(call cc-ldoption, -Wl$(comma)--build-id,))
 697 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 698 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 699
 700 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
 701 LDFLAGS_vmlinux += $(call ld-option, -X,)
 702 endif
 703
 704 # Default kernel image to build when no specific target is given.
 705 # KBUILD_IMAGE may be overruled on the command line or
 706 # set in the environment
 707 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 708 # this default value
 709 export KBUILD_IMAGE ?= vmlinux
 710
 711 #
 712 # INSTALL_PATH specifies where to place the updated kernel and system map
 713 # images. Default is /boot, but you can set it to other values
 714 export  INSTALL_PATH ?= /boot
 715
 716 #
 717 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 718 # relocations required by build roots.  This is not defined in the
 719 # makefile but the argument can be passed to make if needed.
 720 #
 721
 722 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 723 export MODLIB
 724
 725 #
 726 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 727 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 728 #  the default option --strip-debug will be used.  Otherwise,
 729 #  INSTALL_MOD_STRIP value will be used as the options to the strip command.
 730
 731 ifdef INSTALL_MOD_STRIP
 732 ifeq ($(INSTALL_MOD_STRIP),1)
 733 mod_strip_cmd = $(STRIP) --strip-debug
 734 else
 735 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 736 endif # INSTALL_MOD_STRIP=1
 737 else
 738 mod_strip_cmd = true
 739 endif # INSTALL_MOD_STRIP
 740 export mod_strip_cmd
 741
 742
 743 ifdef CONFIG_MODULE_SIG_ALL
 744 MODSECKEY = ./signing_key.priv
 745 MODPUBKEY = ./signing_key.x509
 746 export MODPUBKEY
 747 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
 748 else
 749 mod_sign_cmd = true
 750 endif
 751 export mod_sign_cmd
 752
 753
 754 ifeq ($(KBUILD_EXTMOD),)
 755 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 756
 757 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 758                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 759                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 760
 761 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 762                      $(init-n) $(init-) \
 763                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 764                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 765
 766 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 767 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 768 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 769 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 770 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 771 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 772 libs-y          := $(libs-y1) $(libs-y2)
 773
 774 # Externally visible symbols (used by link-vmlinux.sh)
 775 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
 776 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 777 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
 778 export LDFLAGS_vmlinux
 779 # used by scripts/pacmage/Makefile
 780 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
 781
 782 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
 783
 784 # Final link of vmlinux
 785       cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
 786 quiet_cmd_link-vmlinux = LINK    $@
 787
 788 # Include targets which we want to
 789 # execute if the rest of the kernel build went well.
 790 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
 791 ifdef CONFIG_HEADERS_CHECK
 792         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 793 endif
 794 ifdef CONFIG_SAMPLES
 795         $(Q)$(MAKE) $(build)=samples
 796 endif
 797 ifdef CONFIG_BUILD_DOCSRC
 798         $(Q)$(MAKE) $(build)=Documentation
 799 endif
 800         +$(call if_changed,link-vmlinux)
 801
 802 # The actual objects are generated when descending,
 803 # make sure no implicit rule kicks in
 804 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
 805
 806 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 807 # Preset locale variables to speed up the build process. Limit locale
 808 # tweaks to this spot to avoid wrong language settings when running
 809 # make menuconfig etc.
 810 # Error messages still appears in the original language
 811
 812 PHONY += $(vmlinux-dirs)
 813 $(vmlinux-dirs): prepare scripts
 814         $(Q)$(MAKE) $(build)=$@
 815
 816 # Store (new) KERNELRELASE string in include/config/kernel.release
 817 include/config/kernel.release: include/config/auto.conf FORCE
 818         $(Q)rm -f $@
 819         $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
 820
 821
 822 # Things we need to do before we recursively start building the kernel
 823 # or the modules are listed in "prepare".
 824 # A multi level approach is used. prepareN is processed before prepareN-1.
 825 # archprepare is used in arch Makefiles and when processed asm symlink,
 826 # version.h and scripts_basic is processed / created.
 827
 828 # Listed in dependency order
 829 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 830
 831 # prepare3 is used to check if we are building in a separate output directory,
 832 # and if so do:
 833 # 1) Check that make has not been executed in the kernel src $(srctree)
 834 prepare3: include/config/kernel.release
 835 ifneq ($(KBUILD_SRC),)
 836         @$(kecho) '  Using $(srctree) as source for kernel'
 837         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 838                 echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
 839                 echo >&2 "  in the '$(srctree)' directory.";\
 840                 /bin/false; \
 841         fi;
 842 endif
 843
 844 # prepare2 creates a makefile if using a separate output directory
 845 prepare2: prepare3 outputmakefile asm-generic
 846
 847 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
 848                    include/config/auto.conf
 849         $(cmd_crmodverdir)
 850
 851 archprepare: archheaders archscripts prepare1 scripts_basic
 852
 853 prepare0: archprepare FORCE
 854         $(Q)$(MAKE) $(build)=.
 855
 856 # All the preparing..
 857 prepare: prepare0
 858
 859 # Generate some files
 860 # ---------------------------------------------------------------------------
 861
 862 # KERNELRELEASE can change from a few different places, meaning version.h
 863 # needs to be updated, so this check is forced on all builds
 864
 865 uts_len := 64
 866 define filechk_utsrelease.h
 867         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 868           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 869           exit 1;                                                         \
 870         fi;                                                               \
 871         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";                  \
 872         echo \#define BUILD_INFO \"$(MTK_BUILD_VERNO)\";                  \
 873         echo \#define BUILD_FINGERPRINT \"$(TARGET_PRODUCT)\";)
 874 endef
 875
 876 define filechk_version.h
 877         (echo \#define LINUX_VERSION_CODE $(shell                         \
 878         expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
 879         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 880 endef
 881
 882 $(version_h): $(srctree)/Makefile FORCE
 883         $(call filechk,version.h)
 884
 885 include/generated/utsrelease.h: include/config/kernel.release FORCE
 886         $(call filechk,utsrelease.h)
 887
 888 PHONY += headerdep
 889 headerdep:
 890         $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
 891         $(srctree)/scripts/headerdep.pl -I$(srctree)/include
 892
 893 # ---------------------------------------------------------------------------
 894
 895 PHONY += depend dep
 896 depend dep:
 897         @echo '*** Warning: make $@ is unnecessary now.'
 898
 899 # ---------------------------------------------------------------------------
 900 # Firmware install
 901 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
 902 export INSTALL_FW_PATH
 903
 904 PHONY += firmware_install
 905 firmware_install: FORCE
 906         @mkdir -p $(objtree)/firmware
 907         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
 908
 909 # ---------------------------------------------------------------------------
 910 # Kernel headers
 911
 912 #Default location for installed headers
 913 export INSTALL_HDR_PATH = $(objtree)/usr
 914
 915 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
 916
 917 # If we do an all arch process set dst to asm-$(hdr-arch)
 918 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
 919
 920 PHONY += archheaders
 921 archheaders:
 922
 923 PHONY += archscripts
 924 archscripts:
 925
 926 PHONY += __headers
 927 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
 928         $(Q)$(MAKE) $(build)=scripts build_unifdef
 929
 930 PHONY += headers_install_all
 931 headers_install_all:
 932         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
 933
 934 PHONY += headers_install
 935 headers_install: __headers
 936         $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
 937           $(error Headers not exportable for the $(SRCARCH) architecture))
 938         $(Q)$(MAKE) $(hdr-inst)=include/uapi
 939         $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
 940
 941 PHONY += headers_check_all
 942 headers_check_all: headers_install_all
 943         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
 944
 945 PHONY += headers_check
 946 headers_check: headers_install
 947         $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
 948         $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
 949
 950 # ---------------------------------------------------------------------------
 951 # Modules
 952
 953 ifdef CONFIG_MODULES
 954
 955 # By default, build modules as well
 956
 957 all: modules
 958
 959 #       Build modules
 960 #
 961 #       A module can be listed more than once in obj-m resulting in
 962 #       duplicate lines in modules.order files.  Those are removed
 963 #       using awk while concatenating to the final file.
 964
 965 PHONY += modules
 966 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
 967         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
 968         @$(kecho) '  Building modules, stage 2.';
 969         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 970         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
 971
 972 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
 973         $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
 974
 975 %/modules.builtin: include/config/auto.conf
 976         $(Q)$(MAKE) $(modbuiltin)=$*
 977
 978
 979 # Target to prepare building external modules
 980 PHONY += modules_prepare
 981 modules_prepare: prepare scripts
 982
 983 # Target to install modules
 984 PHONY += modules_install
 985 modules_install: _modinst_ _modinst_post
 986
 987 PHONY += _modinst_
 988 _modinst_:
 989         @rm -rf $(MODLIB)/kernel
 990         @rm -f $(MODLIB)/source
 991         @mkdir -p $(MODLIB)/kernel
 992         @ln -s $(srctree) $(MODLIB)/source
 993         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 994                 rm -f $(MODLIB)/build ; \
 995                 ln -s $(objtree) $(MODLIB)/build ; \
 996         fi
 997         @cp -f $(objtree)/modules.order $(MODLIB)/
 998         @cp -f $(objtree)/modules.builtin $(MODLIB)/
 999         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1000
1001 # This depmod is only for convenience to give the initial
1002 # boot a modules.dep even before / is mounted read-write.  However the
1003 # boot script depmod is the master version.
1004 PHONY += _modinst_post
1005 _modinst_post: _modinst_
1006         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1007         $(call cmd,depmod)
1008
1009 # MTK {
1010 # Target to install android modules
1011
1012 AMODLIB = $(INSTALL_MOD_PATH)/lib/modules
1013 export AMODLIB
1014 AMODSYMLIB = $(INSTALL_MOD_PATH)/../symbols/system/lib/modules
1015 export AMODSYMLIB
1016
1017 PHONY += android_modules_install
1018 android_modules_install: _android_modinst_
1019
1020 PHONY += _android_modinst_
1021 _android_modinst_:
1022         @if [ ! -d $(AMODLIB) ]; then \
1023                 mkdir -p $(AMODLIB); \
1024         fi
1025         @if [ ! -d $(AMODSYMLIB) ]; then \
1026                 mkdir -p $(AMODSYMLIB); \
1027         fi
1028         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.android.modinst
1029 # MTK }
1030
1031
1032 ifeq ($(CONFIG_MODULE_SIG), y)
1033 PHONY += modules_sign
1034 modules_sign:
1035         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1036 endif
1037
1038 else # CONFIG_MODULES
1039
1040 # Modules not configured
1041 # ---------------------------------------------------------------------------
1042
1043 modules modules_install: FORCE
1044         @echo >&2
1045         @echo >&2 "The present kernel configuration has modules disabled."
1046         @echo >&2 "Type 'make config' and enable loadable module support."
1047         @echo >&2 "Then build a kernel with module support enabled."
1048         @echo >&2
1049         @exit 1
1050
1051 endif # CONFIG_MODULES
1052
1053 ###
1054 # Cleaning is done on three levels.
1055 # make clean     Delete most generated files
1056 #                Leave enough to build external modules
1057 # make mrproper  Delete the current configuration, and all generated files
1058 # make distclean Remove editor backup files, patch leftover files and the like
1059
1060 # Directories & files removed with 'make clean'
1061 CLEAN_DIRS  += $(MODVERDIR)
1062
1063 # Directories & files removed with 'make mrproper'
1064 MRPROPER_DIRS  += include/config usr/include include/generated          \
1065                   arch/*/include/generated
1066 MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1067                   Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1068                   signing_key.priv signing_key.x509 x509.genkey         \
1069                   extra_certificates signing_key.x509.keyid             \
1070                   signing_key.x509.signer
1071
1072 # clean - Delete most, but leave enough to build external modules
1073 #
1074 clean: rm-dirs  := $(CLEAN_DIRS)
1075 clean: rm-files := $(CLEAN_FILES)
1076 clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1077
1078 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1079 $(clean-dirs):
1080         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1081
1082 vmlinuxclean:
1083         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1084
1085 clean: archclean vmlinuxclean
1086
1087 # mrproper - Delete all generated files, including .config
1088 #
1089 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1090 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1091 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1092
1093 PHONY += $(mrproper-dirs) mrproper archmrproper
1094 $(mrproper-dirs):
1095         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1096
1097 mrproper: clean archmrproper $(mrproper-dirs)
1098         $(call cmd,rmdirs)
1099         $(call cmd,rmfiles)
1100
1101 # distclean
1102 #
1103 PHONY += distclean
1104
1105 distclean: mrproper
1106         @find $(srctree) $(RCS_FIND_IGNORE) \
1107                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1108                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1109                 -o -name '.*.rej' \
1110                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1111                 -type f -print | xargs rm -f
1112
1113
1114 # Packaging of the kernel to various formats
1115 # ---------------------------------------------------------------------------
1116 # rpm target kept for backward compatibility
1117 package-dir     := $(srctree)/scripts/package
1118
1119 %src-pkg: FORCE
1120         $(Q)$(MAKE) $(build)=$(package-dir) $@
1121 %pkg: include/config/kernel.release FORCE
1122         $(Q)$(MAKE) $(build)=$(package-dir) $@
1123 rpm: include/config/kernel.release FORCE
1124         $(Q)$(MAKE) $(build)=$(package-dir) $@
1125
1126
1127 # Brief documentation of the typical targets used
1128 # ---------------------------------------------------------------------------
1129
1130 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1131 boards := $(notdir $(boards))
1132 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1133 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1134
1135 help:
1136         @echo  'Cleaning targets:'
1137         @echo  '  clean           - Remove most generated files but keep the config and'
1138         @echo  '                    enough build support to build external modules'
1139         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1140         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1141         @echo  ''
1142         @echo  'Configuration targets:'
1143         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1144         @echo  ''
1145         @echo  'Other generic targets:'
1146         @echo  '  all             - Build all targets marked with [*]'
1147         @echo  '* vmlinux         - Build the bare kernel'
1148         @echo  '* modules         - Build all modules'
1149         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1150         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1151         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1152         @echo  '  dir/            - Build all files in dir and below'
1153         @echo  '  dir/file.[oisS] - Build specified target only'
1154         @echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1155         @echo  '                    (requires a recent binutils and recent build (System.map))'
1156         @echo  '  dir/file.ko     - Build module including final link'
1157         @echo  '  modules_prepare - Set up for building external modules'
1158         @echo  '  tags/TAGS       - Generate tags file for editors'
1159         @echo  '  cscope          - Generate cscope index'
1160         @echo  '  gtags           - Generate GNU GLOBAL index'
1161         @echo  '  kernelrelease   - Output the release version string'
1162         @echo  '  kernelversion   - Output the version stored in Makefile'
1163         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1164          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1165          echo  ''
1166         @echo  'Static analysers'
1167         @echo  '  checkstack      - Generate a list of stack hogs'
1168         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1169         @echo  '  versioncheck    - Sanity check on version.h usage'
1170         @echo  '  includecheck    - Check for duplicate included header files'
1171         @echo  '  export_report   - List the usages of all exported symbols'
1172         @echo  '  headers_check   - Sanity check on exported headers'
1173         @echo  '  headerdep       - Detect inclusion cycles in headers'
1174         @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1175         @echo  ''
1176         @echo  'Kernel packaging:'
1177         @$(MAKE) $(build)=$(package-dir) help
1178         @echo  ''
1179         @echo  'Documentation targets:'
1180         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1181         @echo  ''
1182         @echo  'Architecture specific targets ($(SRCARCH)):'
1183         @$(if $(archhelp),$(archhelp),\
1184                 echo '  No architecture specific help defined for $(SRCARCH)')
1185         @echo  ''
1186         @$(if $(boards), \
1187                 $(foreach b, $(boards), \
1188                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1189                 echo '')
1190         @$(if $(board-dirs), \
1191                 $(foreach b, $(board-dirs), \
1192                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1193                 printf "  %-16s - Show all of the above\\n" help-boards; \
1194                 echo '')
1195
1196         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1197         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1198         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1199         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1200         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1201         @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1202         @echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
1203         @echo  '                1: warnings which may be relevant and do not occur too often'
1204         @echo  '                2: warnings which occur quite often but may still be relevant'
1205         @echo  '                3: more obscure warnings, can most likely be ignored'
1206         @echo  '                Multiple levels can be combined with W=12 or W=123'
1207         @echo  ''
1208         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1209         @echo  'For further info see the ./README file'
1210
1211
1212 help-board-dirs := $(addprefix help-,$(board-dirs))
1213
1214 help-boards: $(help-board-dirs)
1215
1216 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1217
1218 $(help-board-dirs): help-%:
1219         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1220         @$(if $(boards-per-dir), \
1221                 $(foreach b, $(boards-per-dir), \
1222                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1223                 echo '')
1224
1225
1226 # Documentation targets
1227 # ---------------------------------------------------------------------------
1228 %docs: scripts_basic FORCE
1229         $(Q)$(MAKE) $(build)=scripts build_docproc
1230         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1231
1232 else # KBUILD_EXTMOD
1233
1234 ###
1235 # External module support.
1236 # When building external modules the kernel used as basis is considered
1237 # read-only, and no consistency checks are made and the make
1238 # system is not used on the basis kernel. If updates are required
1239 # in the basis kernel ordinary make commands (without M=...) must
1240 # be used.
1241 #
1242 # The following are the only valid targets when building external
1243 # modules.
1244 # make M=dir clean     Delete all automatically generated files
1245 # make M=dir modules   Make all modules in specified dir
1246 # make M=dir           Same as 'make M=dir modules'
1247 # make M=dir modules_install
1248 #                      Install the modules built in the module directory
1249 #                      Assumes install directory is already created
1250
1251 # We are always building modules
1252 KBUILD_MODULES := 1
1253 PHONY += crmodverdir
1254 crmodverdir:
1255         $(cmd_crmodverdir)
1256
1257 PHONY += $(objtree)/Module.symvers
1258 $(objtree)/Module.symvers:
1259         @test -e $(objtree)/Module.symvers || ( \
1260         echo; \
1261         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1262         echo "           is missing; modules will have no dependencies and modversions."; \
1263         echo )
1264
1265 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1266 PHONY += $(module-dirs) modules
1267 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1268         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1269
1270 modules: $(module-dirs)
1271         @$(kecho) '  Building modules, stage 2.';
1272         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1273
1274 PHONY += modules_install
1275 modules_install: _emodinst_ _emodinst_post
1276
1277 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1278 PHONY += _emodinst_
1279 _emodinst_:
1280         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1281         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1282
1283 PHONY += _emodinst_post
1284 _emodinst_post: _emodinst_
1285         $(call cmd,depmod)
1286
1287 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1288
1289 PHONY += $(clean-dirs) clean
1290 $(clean-dirs):
1291         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1292
1293 clean:  rm-dirs := $(MODVERDIR)
1294 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1295
1296 help:
1297         @echo  '  Building external modules.'
1298         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1299         @echo  ''
1300         @echo  '  modules         - default target, build the module(s)'
1301         @echo  '  modules_install - install the module'
1302         @echo  '  clean           - remove generated files in module directory only'
1303         @echo  ''
1304
1305 # Dummies...
1306 PHONY += prepare scripts
1307 prepare: ;
1308 scripts: ;
1309 endif # KBUILD_EXTMOD
1310
1311 clean: $(clean-dirs)
1312         $(call cmd,rmdirs)
1313         $(call cmd,rmfiles)
1314         @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1315                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1316                 -o -name '*.ko.*' \
1317                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1318                 -o -name '*.symtypes' -o -name 'modules.order' \
1319                 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1320                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1321
1322 # Generate tags for editors
1323 # ---------------------------------------------------------------------------
1324 quiet_cmd_tags = GEN     $@
1325       cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1326
1327 tags TAGS cscope gtags: FORCE
1328         $(call cmd,tags)
1329
1330 # Scripts to check various things for consistency
1331 # ---------------------------------------------------------------------------
1332
1333 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1334
1335 includecheck:
1336         find $(srctree)/* $(RCS_FIND_IGNORE) \
1337                 -name '*.[hcS]' -type f -print | sort \
1338                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1339
1340 versioncheck:
1341         find $(srctree)/* $(RCS_FIND_IGNORE) \
1342                 -name '*.[hcS]' -type f -print | sort \
1343                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1344
1345 coccicheck:
1346         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1347
1348 namespacecheck:
1349         $(PERL) $(srctree)/scripts/namespace.pl
1350
1351 export_report:
1352         $(PERL) $(srctree)/scripts/export_report.pl
1353
1354 endif #ifeq ($(config-targets),1)
1355 endif #ifeq ($(mixed-targets),1)
1356
1357 PHONY += checkstack kernelrelease kernelversion
1358
1359 # UML needs a little special treatment here.  It wants to use the host
1360 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1361 # else wants $(ARCH), including people doing cross-builds, which means
1362 # that $(SUBARCH) doesn't work here.
1363 ifeq ($(ARCH), um)
1364 CHECKSTACK_ARCH := $(SUBARCH)
1365 else
1366 CHECKSTACK_ARCH := $(ARCH)
1367 endif
1368 checkstack:
1369         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1370         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1371
1372 kernelrelease:
1373         @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1374
1375 kernelversion:
1376         @echo $(KERNELVERSION)
1377
1378 # Clear a bunch of variables before executing the submake
1379 tools/: FORCE
1380         $(Q)mkdir -p $(objtree)/tools
1381         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
1382
1383 tools/%: FORCE
1384         $(Q)mkdir -p $(objtree)/tools
1385         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
1386
1387 # Single targets
1388 # ---------------------------------------------------------------------------
1389 # Single targets are compatible with:
1390 # - build with mixed source and output
1391 # - build with separate output dir 'make O=...'
1392 # - external modules
1393 #
1394 #  target-dir => where to store outputfile
1395 #  build-dir  => directory in kernel source tree to use
1396
1397 ifeq ($(KBUILD_EXTMOD),)
1398         build-dir  = $(patsubst %/,%,$(dir $@))
1399         target-dir = $(dir $@)
1400 else
1401         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1402         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1403         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1404 endif
1405
1406 %.s: %.c prepare scripts FORCE
1407         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1408 %.i: %.c prepare scripts FORCE
1409         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1410 %.o: %.c prepare scripts FORCE
1411         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1412 %.lst: %.c prepare scripts FORCE
1413         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1414 %.s: %.S prepare scripts FORCE
1415         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1416 %.o: %.S prepare scripts FORCE
1417         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1418 %.symtypes: %.c prepare scripts FORCE
1419         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1420
1421 # Modules
1422 /: prepare scripts FORCE
1423         $(cmd_crmodverdir)
1424         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1425         $(build)=$(build-dir)
1426 %/: prepare scripts FORCE
1427         $(cmd_crmodverdir)
1428         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1429         $(build)=$(build-dir)
1430 %.ko: prepare scripts FORCE
1431         $(cmd_crmodverdir)
1432         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1433         $(build)=$(build-dir) $(@:.ko=.o)
1434         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1435
1436 # FIXME Should go into a make.lib or something
1437 # ===========================================================================
1438
1439 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1440       cmd_rmdirs = rm -rf $(rm-dirs)
1441
1442 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1443       cmd_rmfiles = rm -f $(rm-files)
1444
1445 # Run depmod only if we have System.map and depmod is executable
1446 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1447       cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1448                    $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1449
1450 # Create temporary dir for module support files
1451 # clean it up only when building all modules
1452 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1453                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1454
1455 # read all saved command lines
1456
1457 targets := $(wildcard $(sort $(targets)))
1458 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1459
1460 ifneq ($(cmd_files),)
1461   $(cmd_files): ;       # Do not try to update included dependency files
1462   include $(cmd_files)
1463 endif
1464
1465 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1466 # Usage:
1467 # $(Q)$(MAKE) $(clean)=dir
1468 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1469
1470 endif   # skip-makefile
1471
1472 PHONY += FORCE
1473 FORCE:
1474
1475 # Declare the contents of the .PHONY variable as phony.  We keep that
1476 # information in a variable so we can use it in if_changed and friends.
1477 .PHONY: $(PHONY)