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
 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 $(CF)
 345 CFLAGS_MODULE   =
 346 AFLAGS_MODULE   =
 347 LDFLAGS_MODULE  =
 348 CFLAGS_KERNEL   =
 349 AFLAGS_KERNEL   =
 350 CFLAGS_GCOV     = -fprofile-arcs -ftest-coverage
 351
 352
 353 # Use USERINCLUDE when you must reference the UAPI directories only.
 354 USERINCLUDE    := \
 355                 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
 356                 -Iarch/$(hdr-arch)/include/generated/uapi \
 357                 -I$(srctree)/include/uapi \
 358                 -Iinclude/generated/uapi \
 359                 -include $(srctree)/include/linux/kconfig.h
 360
 361 # Use LINUXINCLUDE when you must reference the include/ directory.
 362 # Needed to be compatible with the O= option
 363 LINUXINCLUDE    := \
 364                 -I$(srctree)/arch/$(hdr-arch)/include \
 365                 -Iarch/$(hdr-arch)/include/generated \
 366                 $(if $(KBUILD_SRC), -I$(srctree)/include) \
 367                 -Iinclude \
 368                 $(USERINCLUDE)
 369
 370 KBUILD_CPPFLAGS := -D__KERNEL__
 371
 372 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 373                    -fno-strict-aliasing -fno-common \
 374                    -Werror-implicit-function-declaration \
 375                    -Wno-format-security \
 376                    -fno-delete-null-pointer-checks \
 377                    -Werror=format -Werror=int-to-pointer-cast -Werror=pointer-to-int-cast \
 378                    -w
 379
 380 KBUILD_AFLAGS_KERNEL :=
 381 KBUILD_CFLAGS_KERNEL :=
 382 KBUILD_AFLAGS   := -D__ASSEMBLY__
 383 KBUILD_AFLAGS_MODULE  := -DMODULE
 384 KBUILD_CFLAGS_MODULE  := -DMODULE
 385 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
 386
 387 -include $(srctree)/$(MTK_PROJECT)_mtk_cust.mak
 388 #MTK_INC += -I$(MTK_ROOT_CUSTOM)/$(MTK_PROJECT)/common
 389 LINUXINCLUDE    += $(MTK_INC)
 390 KBUILD_CFLAGS   += $(MTK_CFLAGS) $(MTK_CDEFS) -fno-pic
 391 KBUILD_CPPFLAGS += $(MTK_CPPFLAGS) $(MTK_CPPDEFS)
 392 KBUILD_AFLAGS   += $(MTK_AFLAGS) $(MTK_ADEFS)
 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          asm-generic
 528         $(Q)$(MAKE) $(build)=$(@)
 529
 530 # Objects we will link into vmlinux / subdirs we need to visit
 531 init-y          := init/
 532 drivers-y       := drivers/ sound/ firmware/
 533 net-y           := net/
 534 libs-y          := lib/
 535 core-y          := usr/
 536 endif # KBUILD_EXTMOD
 537
 538 ifeq ($(dot-config),1)
 539 # Read in config
 540 -include include/config/auto.conf
 541
 542 ifeq ($(KBUILD_EXTMOD),)
 543 # Read in dependencies to all Kconfig* files, make sure to run
 544 # oldconfig if changes are detected.
 545 -include include/config/auto.conf.cmd
 546
 547 # To avoid any implicit rule to kick in, define an empty command
 548 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 549
 550 # If .config is newer than include/config/auto.conf, someone tinkered
 551 # with it and forgot to run make oldconfig.
 552 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 553 # we execute the config step to be sure to catch updated Kconfig files
 554 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 555         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 556 else
 557 # external modules needs include/generated/autoconf.h and include/config/auto.conf
 558 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 559 PHONY += include/config/auto.conf
 560
 561 include/config/auto.conf:
 562         $(Q)test -e include/generated/autoconf.h -a -e $@ || (          \
 563         echo >&2;                                                       \
 564         echo >&2 "  ERROR: Kernel configuration is invalid.";           \
 565         echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
 566         echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";      \
 567         echo >&2 ;                                                      \
 568         /bin/false)
 569
 570 endif # KBUILD_EXTMOD
 571
 572 else
 573 # Dummy target needed, because used as prerequisite
 574 include/config/auto.conf: ;
 575 endif # $(dot-config)
 576
 577 # The all: target is the default when no target is given on the
 578 # command line.
 579 # This allow a user to issue only 'make' to build a kernel including modules
 580 # Defaults to vmlinux, but the arch makefile usually adds further targets
 581 all: vmlinux
 582
 583 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 584 KBUILD_CFLAGS   += -Os $(call cc-disable-warning,maybe-uninitialized,)
 585 else
 586 KBUILD_CFLAGS   += -O2
 587 endif
 588
 589 include $(srctree)/arch/$(SRCARCH)/Makefile
 590
 591 ifdef CONFIG_READABLE_ASM
 592 # Disable optimizations that make assembler listings hard to read.
 593 # reorder blocks reorders the control in the function
 594 # ipa clone creates specialized cloned functions
 595 # partial inlining inlines only parts of functions
 596 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
 597                  $(call cc-option,-fno-ipa-cp-clone,) \
 598                  $(call cc-option,-fno-partial-inlining)
 599 endif
 600
 601 ifneq ($(CONFIG_FRAME_WARN),0)
 602 KBUILD_CFLAGS += $(call cc-option,-Werror=frame-larger-than=1)
 603 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 604 endif
 605
 606 # Force gcc to behave correct even for buggy distributions
 607 ifndef CONFIG_CC_STACKPROTECTOR
 608 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
 609 endif
 610
 611 # This warning generated too much noise in a regular build.
 612 # Use make W=1 to enable this warning (see scripts/Makefile.build)
 613 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
 614
 615 ifdef CONFIG_FRAME_POINTER
 616 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
 617 else
 618 # Some targets (ARM with Thumb2, for example), can't be built with frame
 619 # pointers.  For those, we don't have FUNCTION_TRACER automatically
 620 # select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
 621 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
 622 # -fomit-frame-pointer with FUNCTION_TRACER.
 623 ifndef CONFIG_FUNCTION_TRACER
 624 KBUILD_CFLAGS   += -fomit-frame-pointer
 625 endif
 626 endif
 627
 628 KBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
 629
 630 ifdef CONFIG_DEBUG_INFO
 631 KBUILD_CFLAGS   += -g
 632 KBUILD_AFLAGS   += -gdwarf-2
 633 endif
 634
 635 ifdef CONFIG_DEBUG_INFO_REDUCED
 636 KBUILD_CFLAGS   += $(call cc-option, -femit-struct-debug-baseonly) \
 637                    $(call cc-option,-fno-var-tracking)
 638 endif
 639
 640 ifdef CONFIG_FUNCTION_TRACER
 641 ifdef CONFIG_HAVE_FENTRY
 642 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
 643 endif
 644 KBUILD_CFLAGS   += -pg $(CC_USING_FENTRY)
 645 KBUILD_AFLAGS   += $(CC_USING_FENTRY)
 646 ifdef CONFIG_DYNAMIC_FTRACE
 647         ifdef CONFIG_HAVE_C_RECORDMCOUNT
 648                 BUILD_C_RECORDMCOUNT := y
 649                 export BUILD_C_RECORDMCOUNT
 650         endif
 651 endif
 652 endif
 653
 654 # We trigger additional mismatches with less inlining
 655 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 656 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
 657 endif
 658
 659 # arch Makefile may override CC so keep this after arch Makefile is included
 660 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 661 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 662
 663 # warn about C99 declaration after statement
 664 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 665
 666 # disable pointer signed / unsigned warnings in gcc 4.0
 667 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
 668
 669 # disable invalid "can't wrap" optimizations for signed / pointers
 670 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
 671
 672 # conserve stack if available
 673 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
 674
 675 # use the deterministic mode of AR if available
 676 KBUILD_ARFLAGS := $(call ar-option,D)
 677
 678 # check for 'asm goto'
 679 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
 680         KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
 681 endif
 682
 683 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
 684 KBUILD_CPPFLAGS += $(KCPPFLAGS)
 685 KBUILD_AFLAGS += $(KAFLAGS)
 686 KBUILD_CFLAGS += $(KCFLAGS)
 687
 688 # Use --build-id when available.
 689 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 690                               $(call cc-ldoption, -Wl$(comma)--build-id,))
 691 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 692 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 693
 694 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
 695 LDFLAGS_vmlinux += $(call ld-option, -X,)
 696 endif
 697
 698 # Default kernel image to build when no specific target is given.
 699 # KBUILD_IMAGE may be overruled on the command line or
 700 # set in the environment
 701 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 702 # this default value
 703 export KBUILD_IMAGE ?= vmlinux
 704
 705 #
 706 # INSTALL_PATH specifies where to place the updated kernel and system map
 707 # images. Default is /boot, but you can set it to other values
 708 export  INSTALL_PATH ?= /boot
 709
 710 #
 711 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 712 # relocations required by build roots.  This is not defined in the
 713 # makefile but the argument can be passed to make if needed.
 714 #
 715
 716 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 717 export MODLIB
 718
 719 #
 720 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 721 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 722 #  the default option --strip-debug will be used.  Otherwise,
 723 #  INSTALL_MOD_STRIP value will be used as the options to the strip command.
 724
 725 ifdef INSTALL_MOD_STRIP
 726 ifeq ($(INSTALL_MOD_STRIP),1)
 727 mod_strip_cmd = $(STRIP) --strip-debug
 728 else
 729 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 730 endif # INSTALL_MOD_STRIP=1
 731 else
 732 mod_strip_cmd = true
 733 endif # INSTALL_MOD_STRIP
 734 export mod_strip_cmd
 735
 736
 737 ifdef CONFIG_MODULE_SIG_ALL
 738 MODSECKEY = ./signing_key.priv
 739 MODPUBKEY = ./signing_key.x509
 740 export MODPUBKEY
 741 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
 742 else
 743 mod_sign_cmd = true
 744 endif
 745 export mod_sign_cmd
 746
 747
 748 ifeq ($(KBUILD_EXTMOD),)
 749 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 750
 751 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 752                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 753                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 754
 755 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 756                      $(init-n) $(init-) \
 757                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 758                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 759
 760 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 761 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 762 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 763 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 764 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 765 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 766 libs-y          := $(libs-y1) $(libs-y2)
 767
 768 # Externally visible symbols (used by link-vmlinux.sh)
 769 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
 770 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 771 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
 772 export LDFLAGS_vmlinux
 773 # used by scripts/pacmage/Makefile
 774 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
 775
 776 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
 777
 778 # Final link of vmlinux
 779       cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
 780 quiet_cmd_link-vmlinux = LINK    $@
 781
 782 # Include targets which we want to
 783 # execute if the rest of the kernel build went well.
 784 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
 785 ifdef CONFIG_HEADERS_CHECK
 786         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 787 endif
 788 ifdef CONFIG_SAMPLES
 789         $(Q)$(MAKE) $(build)=samples
 790 endif
 791 ifdef CONFIG_BUILD_DOCSRC
 792         $(Q)$(MAKE) $(build)=Documentation
 793 endif
 794         +$(call if_changed,link-vmlinux)
 795
 796 # The actual objects are generated when descending,
 797 # make sure no implicit rule kicks in
 798 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
 799
 800 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 801 # Preset locale variables to speed up the build process. Limit locale
 802 # tweaks to this spot to avoid wrong language settings when running
 803 # make menuconfig etc.
 804 # Error messages still appears in the original language
 805
 806 PHONY += $(vmlinux-dirs)
 807 $(vmlinux-dirs): prepare scripts
 808         $(Q)$(MAKE) $(build)=$@
 809
 810 # Store (new) KERNELRELASE string in include/config/kernel.release
 811 include/config/kernel.release: include/config/auto.conf FORCE
 812         $(Q)rm -f $@
 813         $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
 814
 815
 816 # Things we need to do before we recursively start building the kernel
 817 # or the modules are listed in "prepare".
 818 # A multi level approach is used. prepareN is processed before prepareN-1.
 819 # archprepare is used in arch Makefiles and when processed asm symlink,
 820 # version.h and scripts_basic is processed / created.
 821
 822 # Listed in dependency order
 823 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 824
 825 # prepare3 is used to check if we are building in a separate output directory,
 826 # and if so do:
 827 # 1) Check that make has not been executed in the kernel src $(srctree)
 828 prepare3: include/config/kernel.release
 829 ifneq ($(KBUILD_SRC),)
 830         @$(kecho) '  Using $(srctree) as source for kernel'
 831         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 832                 echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
 833                 echo >&2 "  in the '$(srctree)' directory.";\
 834                 /bin/false; \
 835         fi;
 836 endif
 837
 838 # prepare2 creates a makefile if using a separate output directory
 839 prepare2: prepare3 outputmakefile asm-generic
 840
 841 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
 842                    include/config/auto.conf
 843         $(cmd_crmodverdir)
 844
 845 archprepare: archheaders archscripts prepare1 scripts_basic
 846
 847 prepare0: archprepare FORCE
 848         $(Q)$(MAKE) $(build)=.
 849
 850 # All the preparing..
 851 prepare: prepare0
 852
 853 # Generate some files
 854 # ---------------------------------------------------------------------------
 855
 856 # KERNELRELEASE can change from a few different places, meaning version.h
 857 # needs to be updated, so this check is forced on all builds
 858
 859 uts_len := 64
 860 define filechk_utsrelease.h
 861         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
 862           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
 863           exit 1;                                                         \
 864         fi;                                                               \
 865         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";                  \
 866         echo \#define BUILD_INFO \"$(MTK_BUILD_VERNO)\";                  \
 867         echo \#define BUILD_FINGERPRINT \"$(TARGET_PRODUCT)\";)
 868 endef
 869
 870 define filechk_version.h
 871         (echo \#define LINUX_VERSION_CODE $(shell                         \
 872         expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
 873         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
 874 endef
 875
 876 $(version_h): $(srctree)/Makefile FORCE
 877         $(call filechk,version.h)
 878
 879 include/generated/utsrelease.h: include/config/kernel.release FORCE
 880         $(call filechk,utsrelease.h)
 881
 882 PHONY += headerdep
 883 headerdep:
 884         $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
 885         $(srctree)/scripts/headerdep.pl -I$(srctree)/include
 886
 887 # ---------------------------------------------------------------------------
 888
 889 PHONY += depend dep
 890 depend dep:
 891         @echo '*** Warning: make $@ is unnecessary now.'
 892
 893 # ---------------------------------------------------------------------------
 894 # Firmware install
 895 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
 896 export INSTALL_FW_PATH
 897
 898 PHONY += firmware_install
 899 firmware_install: FORCE
 900         @mkdir -p $(objtree)/firmware
 901         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
 902
 903 # ---------------------------------------------------------------------------
 904 # Kernel headers
 905
 906 #Default location for installed headers
 907 export INSTALL_HDR_PATH = $(objtree)/usr
 908
 909 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
 910
 911 # If we do an all arch process set dst to asm-$(hdr-arch)
 912 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
 913
 914 PHONY += archheaders
 915 archheaders:
 916
 917 PHONY += archscripts
 918 archscripts:
 919
 920 PHONY += __headers
 921 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
 922         $(Q)$(MAKE) $(build)=scripts build_unifdef
 923
 924 PHONY += headers_install_all
 925 headers_install_all:
 926         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
 927
 928 PHONY += headers_install
 929 headers_install: __headers
 930         $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
 931           $(error Headers not exportable for the $(SRCARCH) architecture))
 932         $(Q)$(MAKE) $(hdr-inst)=include/uapi
 933         $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
 934
 935 PHONY += headers_check_all
 936 headers_check_all: headers_install_all
 937         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
 938
 939 PHONY += headers_check
 940 headers_check: headers_install
 941         $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
 942         $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
 943
 944 # ---------------------------------------------------------------------------
 945 # Modules
 946
 947 ifdef CONFIG_MODULES
 948
 949 # By default, build modules as well
 950
 951 all: modules
 952
 953 #       Build modules
 954 #
 955 #       A module can be listed more than once in obj-m resulting in
 956 #       duplicate lines in modules.order files.  Those are removed
 957 #       using awk while concatenating to the final file.
 958
 959 PHONY += modules
 960 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
 961         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
 962         @$(kecho) '  Building modules, stage 2.';
 963         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 964         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
 965
 966 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
 967         $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
 968
 969 %/modules.builtin: include/config/auto.conf
 970         $(Q)$(MAKE) $(modbuiltin)=$*
 971
 972
 973 # Target to prepare building external modules
 974 PHONY += modules_prepare
 975 modules_prepare: prepare scripts
 976
 977 # Target to install modules
 978 PHONY += modules_install
 979 modules_install: _modinst_ _modinst_post
 980
 981 PHONY += _modinst_
 982 _modinst_:
 983         @rm -rf $(MODLIB)/kernel
 984         @rm -f $(MODLIB)/source
 985         @mkdir -p $(MODLIB)/kernel
 986         @ln -s $(srctree) $(MODLIB)/source
 987         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
 988                 rm -f $(MODLIB)/build ; \
 989                 ln -s $(objtree) $(MODLIB)/build ; \
 990         fi
 991         @cp -f $(objtree)/modules.order $(MODLIB)/
 992         @cp -f $(objtree)/modules.builtin $(MODLIB)/
 993         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 994
 995 # This depmod is only for convenience to give the initial
 996 # boot a modules.dep even before / is mounted read-write.  However the
 997 # boot script depmod is the master version.
 998 PHONY += _modinst_post
 999 _modinst_post: _modinst_
1000         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1001         $(call cmd,depmod)
1002
1003 # MTK {
1004 # Target to install android modules
1005
1006 AMODLIB = $(INSTALL_MOD_PATH)/lib/modules
1007 export AMODLIB
1008 AMODSYMLIB = $(INSTALL_MOD_PATH)/../symbols/system/lib/modules
1009 export AMODSYMLIB
1010
1011 PHONY += android_modules_install
1012 android_modules_install: _android_modinst_
1013
1014 PHONY += _android_modinst_
1015 _android_modinst_:
1016         @if [ ! -d $(AMODLIB) ]; then \
1017                 mkdir -p $(AMODLIB); \
1018         fi
1019         @if [ ! -d $(AMODSYMLIB) ]; then \
1020                 mkdir -p $(AMODSYMLIB); \
1021         fi
1022         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.android.modinst
1023 # MTK }
1024
1025
1026 ifeq ($(CONFIG_MODULE_SIG), y)
1027 PHONY += modules_sign
1028 modules_sign:
1029         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1030 endif
1031
1032 else # CONFIG_MODULES
1033
1034 # Modules not configured
1035 # ---------------------------------------------------------------------------
1036
1037 modules modules_install: FORCE
1038         @echo >&2
1039         @echo >&2 "The present kernel configuration has modules disabled."
1040         @echo >&2 "Type 'make config' and enable loadable module support."
1041         @echo >&2 "Then build a kernel with module support enabled."
1042         @echo >&2
1043         @exit 1
1044
1045 endif # CONFIG_MODULES
1046
1047 ###
1048 # Cleaning is done on three levels.
1049 # make clean     Delete most generated files
1050 #                Leave enough to build external modules
1051 # make mrproper  Delete the current configuration, and all generated files
1052 # make distclean Remove editor backup files, patch leftover files and the like
1053
1054 # Directories & files removed with 'make clean'
1055 CLEAN_DIRS  += $(MODVERDIR)
1056
1057 # Directories & files removed with 'make mrproper'
1058 MRPROPER_DIRS  += include/config usr/include include/generated          \
1059                   arch/*/include/generated
1060 MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1061                   Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1062                   signing_key.priv signing_key.x509 x509.genkey         \
1063                   extra_certificates signing_key.x509.keyid             \
1064                   signing_key.x509.signer
1065
1066 # clean - Delete most, but leave enough to build external modules
1067 #
1068 clean: rm-dirs  := $(CLEAN_DIRS)
1069 clean: rm-files := $(CLEAN_FILES)
1070 clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1071
1072 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1073 $(clean-dirs):
1074         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1075
1076 vmlinuxclean:
1077         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1078
1079 clean: archclean vmlinuxclean
1080
1081 # mrproper - Delete all generated files, including .config
1082 #
1083 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1084 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1085 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1086
1087 PHONY += $(mrproper-dirs) mrproper archmrproper
1088 $(mrproper-dirs):
1089         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1090
1091 mrproper: clean archmrproper $(mrproper-dirs)
1092         $(call cmd,rmdirs)
1093         $(call cmd,rmfiles)
1094
1095 # distclean
1096 #
1097 PHONY += distclean
1098
1099 distclean: mrproper
1100         @find $(srctree) $(RCS_FIND_IGNORE) \
1101                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1102                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1103                 -o -name '.*.rej' \
1104                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1105                 -type f -print | xargs rm -f
1106
1107
1108 # Packaging of the kernel to various formats
1109 # ---------------------------------------------------------------------------
1110 # rpm target kept for backward compatibility
1111 package-dir     := $(srctree)/scripts/package
1112
1113 %src-pkg: FORCE
1114         $(Q)$(MAKE) $(build)=$(package-dir) $@
1115 %pkg: include/config/kernel.release FORCE
1116         $(Q)$(MAKE) $(build)=$(package-dir) $@
1117 rpm: include/config/kernel.release FORCE
1118         $(Q)$(MAKE) $(build)=$(package-dir) $@
1119
1120
1121 # Brief documentation of the typical targets used
1122 # ---------------------------------------------------------------------------
1123
1124 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1125 boards := $(notdir $(boards))
1126 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1127 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1128
1129 help:
1130         @echo  'Cleaning targets:'
1131         @echo  '  clean           - Remove most generated files but keep the config and'
1132         @echo  '                    enough build support to build external modules'
1133         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1134         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1135         @echo  ''
1136         @echo  'Configuration targets:'
1137         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1138         @echo  ''
1139         @echo  'Other generic targets:'
1140         @echo  '  all             - Build all targets marked with [*]'
1141         @echo  '* vmlinux         - Build the bare kernel'
1142         @echo  '* modules         - Build all modules'
1143         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1144         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1145         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1146         @echo  '  dir/            - Build all files in dir and below'
1147         @echo  '  dir/file.[oisS] - Build specified target only'
1148         @echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1149         @echo  '                    (requires a recent binutils and recent build (System.map))'
1150         @echo  '  dir/file.ko     - Build module including final link'
1151         @echo  '  modules_prepare - Set up for building external modules'
1152         @echo  '  tags/TAGS       - Generate tags file for editors'
1153         @echo  '  cscope          - Generate cscope index'
1154         @echo  '  gtags           - Generate GNU GLOBAL index'
1155         @echo  '  kernelrelease   - Output the release version string'
1156         @echo  '  kernelversion   - Output the version stored in Makefile'
1157         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1158          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1159          echo  ''
1160         @echo  'Static analysers'
1161         @echo  '  checkstack      - Generate a list of stack hogs'
1162         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1163         @echo  '  versioncheck    - Sanity check on version.h usage'
1164         @echo  '  includecheck    - Check for duplicate included header files'
1165         @echo  '  export_report   - List the usages of all exported symbols'
1166         @echo  '  headers_check   - Sanity check on exported headers'
1167         @echo  '  headerdep       - Detect inclusion cycles in headers'
1168         @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1169         @echo  ''
1170         @echo  'Kernel packaging:'
1171         @$(MAKE) $(build)=$(package-dir) help
1172         @echo  ''
1173         @echo  'Documentation targets:'
1174         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1175         @echo  ''
1176         @echo  'Architecture specific targets ($(SRCARCH)):'
1177         @$(if $(archhelp),$(archhelp),\
1178                 echo '  No architecture specific help defined for $(SRCARCH)')
1179         @echo  ''
1180         @$(if $(boards), \
1181                 $(foreach b, $(boards), \
1182                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1183                 echo '')
1184         @$(if $(board-dirs), \
1185                 $(foreach b, $(board-dirs), \
1186                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1187                 printf "  %-16s - Show all of the above\\n" help-boards; \
1188                 echo '')
1189
1190         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1191         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1192         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1193         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1194         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1195         @echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1196         @echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
1197         @echo  '                1: warnings which may be relevant and do not occur too often'
1198         @echo  '                2: warnings which occur quite often but may still be relevant'
1199         @echo  '                3: more obscure warnings, can most likely be ignored'
1200         @echo  '                Multiple levels can be combined with W=12 or W=123'
1201         @echo  ''
1202         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1203         @echo  'For further info see the ./README file'
1204
1205
1206 help-board-dirs := $(addprefix help-,$(board-dirs))
1207
1208 help-boards: $(help-board-dirs)
1209
1210 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1211
1212 $(help-board-dirs): help-%:
1213         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1214         @$(if $(boards-per-dir), \
1215                 $(foreach b, $(boards-per-dir), \
1216                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1217                 echo '')
1218
1219
1220 # Documentation targets
1221 # ---------------------------------------------------------------------------
1222 %docs: scripts_basic FORCE
1223         $(Q)$(MAKE) $(build)=scripts build_docproc
1224         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1225
1226 else # KBUILD_EXTMOD
1227
1228 ###
1229 # External module support.
1230 # When building external modules the kernel used as basis is considered
1231 # read-only, and no consistency checks are made and the make
1232 # system is not used on the basis kernel. If updates are required
1233 # in the basis kernel ordinary make commands (without M=...) must
1234 # be used.
1235 #
1236 # The following are the only valid targets when building external
1237 # modules.
1238 # make M=dir clean     Delete all automatically generated files
1239 # make M=dir modules   Make all modules in specified dir
1240 # make M=dir           Same as 'make M=dir modules'
1241 # make M=dir modules_install
1242 #                      Install the modules built in the module directory
1243 #                      Assumes install directory is already created
1244
1245 # We are always building modules
1246 KBUILD_MODULES := 1
1247 PHONY += crmodverdir
1248 crmodverdir:
1249         $(cmd_crmodverdir)
1250
1251 PHONY += $(objtree)/Module.symvers
1252 $(objtree)/Module.symvers:
1253         @test -e $(objtree)/Module.symvers || ( \
1254         echo; \
1255         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1256         echo "           is missing; modules will have no dependencies and modversions."; \
1257         echo )
1258
1259 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1260 PHONY += $(module-dirs) modules
1261 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1262         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1263
1264 modules: $(module-dirs)
1265         @$(kecho) '  Building modules, stage 2.';
1266         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1267
1268 PHONY += modules_install
1269 modules_install: _emodinst_ _emodinst_post
1270
1271 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1272 PHONY += _emodinst_
1273 _emodinst_:
1274         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1275         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1276
1277 PHONY += _emodinst_post
1278 _emodinst_post: _emodinst_
1279         $(call cmd,depmod)
1280
1281 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1282
1283 PHONY += $(clean-dirs) clean
1284 $(clean-dirs):
1285         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1286
1287 clean:  rm-dirs := $(MODVERDIR)
1288 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1289
1290 help:
1291         @echo  '  Building external modules.'
1292         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1293         @echo  ''
1294         @echo  '  modules         - default target, build the module(s)'
1295         @echo  '  modules_install - install the module'
1296         @echo  '  clean           - remove generated files in module directory only'
1297         @echo  ''
1298
1299 # Dummies...
1300 PHONY += prepare scripts
1301 prepare: ;
1302 scripts: ;
1303 endif # KBUILD_EXTMOD
1304
1305 clean: $(clean-dirs)
1306         $(call cmd,rmdirs)
1307         $(call cmd,rmfiles)
1308         @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1309                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1310                 -o -name '*.ko.*' \
1311                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1312                 -o -name '*.symtypes' -o -name 'modules.order' \
1313                 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1314                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1315
1316 # Generate tags for editors
1317 # ---------------------------------------------------------------------------
1318 quiet_cmd_tags = GEN     $@
1319       cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1320
1321 tags TAGS cscope gtags: FORCE
1322         $(call cmd,tags)
1323
1324 # Scripts to check various things for consistency
1325 # ---------------------------------------------------------------------------
1326
1327 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1328
1329 includecheck:
1330         find $(srctree)/* $(RCS_FIND_IGNORE) \
1331                 -name '*.[hcS]' -type f -print | sort \
1332                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1333
1334 versioncheck:
1335         find $(srctree)/* $(RCS_FIND_IGNORE) \
1336                 -name '*.[hcS]' -type f -print | sort \
1337                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1338
1339 coccicheck:
1340         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1341
1342 namespacecheck:
1343         $(PERL) $(srctree)/scripts/namespace.pl
1344
1345 export_report:
1346         $(PERL) $(srctree)/scripts/export_report.pl
1347
1348 endif #ifeq ($(config-targets),1)
1349 endif #ifeq ($(mixed-targets),1)
1350
1351 PHONY += checkstack kernelrelease kernelversion
1352
1353 # UML needs a little special treatment here.  It wants to use the host
1354 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1355 # else wants $(ARCH), including people doing cross-builds, which means
1356 # that $(SUBARCH) doesn't work here.
1357 ifeq ($(ARCH), um)
1358 CHECKSTACK_ARCH := $(SUBARCH)
1359 else
1360 CHECKSTACK_ARCH := $(ARCH)
1361 endif
1362 checkstack:
1363         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1364         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1365
1366 kernelrelease:
1367         @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1368
1369 kernelversion:
1370         @echo $(KERNELVERSION)
1371
1372 # Clear a bunch of variables before executing the submake
1373 tools/: FORCE
1374         $(Q)mkdir -p $(objtree)/tools
1375         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
1376
1377 tools/%: FORCE
1378         $(Q)mkdir -p $(objtree)/tools
1379         $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
1380
1381 # Single targets
1382 # ---------------------------------------------------------------------------
1383 # Single targets are compatible with:
1384 # - build with mixed source and output
1385 # - build with separate output dir 'make O=...'
1386 # - external modules
1387 #
1388 #  target-dir => where to store outputfile
1389 #  build-dir  => directory in kernel source tree to use
1390
1391 ifeq ($(KBUILD_EXTMOD),)
1392         build-dir  = $(patsubst %/,%,$(dir $@))
1393         target-dir = $(dir $@)
1394 else
1395         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1396         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1397         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1398 endif
1399
1400 %.s: %.c prepare scripts FORCE
1401         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1402 %.i: %.c prepare scripts FORCE
1403         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1404 %.o: %.c prepare scripts FORCE
1405         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1406 %.lst: %.c prepare scripts FORCE
1407         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1408 %.s: %.S prepare scripts FORCE
1409         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1410 %.o: %.S prepare scripts FORCE
1411         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1412 %.symtypes: %.c prepare scripts FORCE
1413         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1414
1415 # Modules
1416 /: prepare scripts FORCE
1417         $(cmd_crmodverdir)
1418         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1419         $(build)=$(build-dir)
1420 %/: prepare scripts FORCE
1421         $(cmd_crmodverdir)
1422         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1423         $(build)=$(build-dir)
1424 %.ko: prepare scripts FORCE
1425         $(cmd_crmodverdir)
1426         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1427         $(build)=$(build-dir) $(@:.ko=.o)
1428         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1429
1430 # FIXME Should go into a make.lib or something
1431 # ===========================================================================
1432
1433 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1434       cmd_rmdirs = rm -rf $(rm-dirs)
1435
1436 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1437       cmd_rmfiles = rm -f $(rm-files)
1438
1439 # Run depmod only if we have System.map and depmod is executable
1440 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1441       cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1442                    $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1443
1444 # Create temporary dir for module support files
1445 # clean it up only when building all modules
1446 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1447                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1448
1449 # read all saved command lines
1450
1451 targets := $(wildcard $(sort $(targets)))
1452 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1453
1454 ifneq ($(cmd_files),)
1455   $(cmd_files): ;       # Do not try to update included dependency files
1456   include $(cmd_files)
1457 endif
1458
1459 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1460 # Usage:
1461 # $(Q)$(MAKE) $(clean)=dir
1462 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1463
1464 endif   # skip-makefile
1465
1466 PHONY += FORCE
1467 FORCE:
1468
1469 # Declare the contents of the .PHONY variable as phony.  We keep that
1470 # information in a variable so we can use it in if_changed and friends.
1471 .PHONY: $(PHONY)