Makefile

   1 VERSION = 2
   2 PATCHLEVEL = 6
   3 SUBLEVEL = 32
   4 EXTRAVERSION = .15
   5 NAME = Man-Eating Seals of Antiquity
   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 # We are using a recursive build, so we need to do a little thinking
  20 # to get the ordering right.
  21 #
  22 # Most importantly: sub-Makefiles should only ever modify files in
  23 # their own directory. If in some directory we have a dependency on
  24 # a file in another dir (which doesn't happen often, but it's often
  25 # unavoidable when linking the built-in.o targets which finally
  26 # turn into vmlinux), we will call a sub make in that other dir, and
  27 # after that we are sure that everything which is in that other dir
  28 # is now up to date.
  29 #
  30 # The only cases where we need to modify files which have global
  31 # effects are thus separated out and done before the recursive
  32 # descending is started. They are now explicitly listed as the
  33 # prepare rule.
  34
  35 # To put more focus on warnings, be less verbose as default
  36 # Use 'make V=1' to see the full commands
  37
  38 ifeq ("$(origin V)", "command line")
  39   KBUILD_VERBOSE = $(V)
  40 endif
  41 ifndef KBUILD_VERBOSE
  42   KBUILD_VERBOSE = 0
  43 endif
  44
  45 # Call a source code checker (by default, "sparse") as part of the
  46 # C compilation.
  47 #
  48 # Use 'make C=1' to enable checking of only re-compiled files.
  49 # Use 'make C=2' to enable checking of *all* source files, regardless
  50 # of whether they are re-compiled or not.
  51 #
  52 # See the file "Documentation/sparse.txt" for more details, including
  53 # where to get the "sparse" utility.
  54
  55 ifeq ("$(origin C)", "command line")
  56   KBUILD_CHECKSRC = $(C)
  57 endif
  58 ifndef KBUILD_CHECKSRC
  59   KBUILD_CHECKSRC = 0
  60 endif
  61
  62 # Use make M=dir to specify directory of external module to build
  63 # Old syntax make ... SUBDIRS=$PWD is still supported
  64 # Setting the environment variable KBUILD_EXTMOD take precedence
  65 ifdef SUBDIRS
  66   KBUILD_EXTMOD ?= $(SUBDIRS)
  67 endif
  68
  69 ifeq ("$(origin M)", "command line")
  70   KBUILD_EXTMOD := $(M)
  71 endif
  72
  73 # kbuild supports saving output files in a separate directory.
  74 # To locate output files in a separate directory two syntaxes are supported.
  75 # In both cases the working directory must be the root of the kernel src.
  76 # 1) O=
  77 # Use "make O=dir/to/store/output/files/"
  78 #
  79 # 2) Set KBUILD_OUTPUT
  80 # Set the environment variable KBUILD_OUTPUT to point to the directory
  81 # where the output files shall be placed.
  82 # export KBUILD_OUTPUT=dir/to/store/output/files/
  83 # make
  84 #
  85 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
  86 # variable.
  87
  88
  89 # KBUILD_SRC is set on invocation of make in OBJ directory
  90 # KBUILD_SRC is not intended to be used by the regular user (for now)
  91 ifeq ($(KBUILD_SRC),)
  92
  93 # OK, Make called in directory where kernel src resides
  94 # Do we want to locate output files in a separate directory?
  95 ifeq ("$(origin O)", "command line")
  96   KBUILD_OUTPUT := $(O)
  97 endif
  98
  99 # That's our default target when none is given on the command line
 100 PHONY := _all
 101 _all:
 102
 103 # Cancel implicit rules on top Makefile
 104 $(CURDIR)/Makefile Makefile: ;
 105
 106 ifneq ($(KBUILD_OUTPUT),)
 107 # Invoke a second make in the output directory, passing relevant variables
 108 # check that the output directory actually exists
 109 saved-output := $(KBUILD_OUTPUT)
 110 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 111 $(if $(KBUILD_OUTPUT),, \
 112      $(error output directory "$(saved-output)" does not exist))
 113
 114 PHONY += $(MAKECMDGOALS) sub-make
 115
 116 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
 117         $(Q)@:
 118
 119 sub-make: FORCE
 120         $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
 121         KBUILD_SRC=$(CURDIR) \
 122         KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
 123         $(filter-out _all sub-make,$(MAKECMDGOALS))
 124
 125 # Leave processing to above invocation of make
 126 skip-makefile := 1
 127 endif # ifneq ($(KBUILD_OUTPUT),)
 128 endif # ifeq ($(KBUILD_SRC),)
 129
 130 # We process the rest of the Makefile if this is the final invocation of make
 131 ifeq ($(skip-makefile),)
 132
 133 # If building an external module we do not care about the all: rule
 134 # but instead _all depend on modules
 135 PHONY += all
 136 ifeq ($(KBUILD_EXTMOD),)
 137 _all: all
 138 else
 139 _all: modules
 140 endif
 141
 142 srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
 143 objtree         := $(CURDIR)
 144 src             := $(srctree)
 145 obj             := $(objtree)
 146
 147 VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 148
 149 export srctree objtree VPATH
 150
 151
 152 # SUBARCH tells the usermode build what the underlying arch is.  That is set
 153 # first, and if a usermode build is happening, the "ARCH=um" on the command
 154 # line overrides the setting of ARCH below.  If a native build is happening,
 155 # then ARCH is assigned, getting whatever value it gets normally, and
 156 # SUBARCH is subsequently ignored.
 157
 158 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 159                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 160                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
 161                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
 162                                   -e s/sh[234].*/sh/ )
 163
 164 SUBARCH := arm
 165
 166 # Cross compiling and selecting different set of gcc/bin-utils
 167 # ---------------------------------------------------------------------------
 168 #
 169 # When performing cross compilation for other architectures ARCH shall be set
 170 # to the target architecture. (See arch/* for the possibilities).
 171 # ARCH can be set during invocation of make:
 172 # make ARCH=ia64
 173 # Another way is to have ARCH set in the environment.
 174 # The default ARCH is the host where make is executed.
 175
 176 # CROSS_COMPILE specify the prefix used for all executables used
 177 # during compilation. Only gcc and related bin-utils executables
 178 # are prefixed with $(CROSS_COMPILE).
 179 # CROSS_COMPILE can be set on the command line
 180 # make CROSS_COMPILE=ia64-linux-
 181 # Alternatively CROSS_COMPILE can be set in the environment.
 182 # Default value for CROSS_COMPILE is not to prefix executables
 183 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 184 export KBUILD_BUILDHOST := $(SUBARCH)
 185 ARCH            ?= $(SUBARCH)
 186 CROSS_COMPILE   ?= arm-eabi-
 187
 188 # Architecture as present in compile.h
 189 UTS_MACHINE     := $(ARCH)
 190 SRCARCH         := $(ARCH)
 191
 192 # Additional ARCH settings for x86
 193 ifeq ($(ARCH),i386)
 194         SRCARCH := x86
 195 endif
 196 ifeq ($(ARCH),x86_64)
 197         SRCARCH := x86
 198 endif
 199
 200 # Additional ARCH settings for sparc
 201 ifeq ($(ARCH),sparc64)
 202        SRCARCH := sparc
 203 endif
 204
 205 # Additional ARCH settings for sh
 206 ifeq ($(ARCH),sh64)
 207        SRCARCH := sh
 208 endif
 209
 210 # Where to locate arch specific headers
 211 hdr-arch  := $(SRCARCH)
 212
 213 ifeq ($(ARCH),m68knommu)
 214        hdr-arch  := m68k
 215 endif
 216
 217 KCONFIG_CONFIG  ?= .config
 218
 219 # SHELL used by kbuild
 220 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 221           else if [ -x /bin/bash ]; then echo /bin/bash; \
 222           else echo sh; fi ; fi)
 223
 224 HOSTCC       = gcc
 225 HOSTCXX      = g++
 226 HOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
 227 HOSTCXXFLAGS = -O2
 228
 229 # Decide whether to build built-in, modular, or both.
 230 # Normally, just do built-in.
 231
 232 KBUILD_MODULES :=
 233 KBUILD_BUILTIN := 1
 234
 235 #       If we have only "make modules", don't compile built-in objects.
 236 #       When we're building modules with modversions, we need to consider
 237 #       the built-in objects during the descend as well, in order to
 238 #       make sure the checksums are up to date before we record them.
 239
 240 ifeq ($(MAKECMDGOALS),modules)
 241   KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 242 endif
 243
 244 #       If we have "make <whatever> modules", compile modules
 245 #       in addition to whatever we do anyway.
 246 #       Just "make" or "make all" shall build modules as well
 247
 248 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 249   KBUILD_MODULES := 1
 250 endif
 251
 252 ifeq ($(MAKECMDGOALS),)
 253   KBUILD_MODULES := 1
 254 endif
 255
 256 export KBUILD_MODULES KBUILD_BUILTIN
 257 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 258
 259 # Beautify output
 260 # ---------------------------------------------------------------------------
 261 #
 262 # Normally, we echo the whole command before executing it. By making
 263 # that echo $($(quiet)$(cmd)), we now have the possibility to set
 264 # $(quiet) to choose other forms of output instead, e.g.
 265 #
 266 #         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 267 #         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 268 #
 269 # If $(quiet) is empty, the whole command will be printed.
 270 # If it is set to "quiet_", only the short version will be printed.
 271 # If it is set to "silent_", nothing will be printed at all, since
 272 # the variable $(silent_cmd_cc_o_c) doesn't exist.
 273 #
 274 # A simple variant is to prefix commands with $(Q) - that's useful
 275 # for commands that shall be hidden in non-verbose mode.
 276 #
 277 #       $(Q)ln $@ :<
 278 #
 279 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 280 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
 281
 282 ifeq ($(KBUILD_VERBOSE),1)
 283   quiet =
 284   Q =
 285 else
 286   quiet=quiet_
 287   Q = @
 288 endif
 289
 290 # If the user is running make -s (silent mode), suppress echoing of
 291 # commands
 292
 293 ifneq ($(findstring s,$(MAKEFLAGS)),)
 294   quiet=silent_
 295 endif
 296
 297 export quiet Q KBUILD_VERBOSE
 298
 299
 300 # Look for make include files relative to root of kernel src
 301 MAKEFLAGS += --include-dir=$(srctree)
 302
 303 # We need some generic definitions (do not try to remake the file).
 304 $(srctree)/scripts/Kbuild.include: ;
 305 include $(srctree)/scripts/Kbuild.include
 306
 307 # Make variables (CC, etc...)
 308
 309 AS              = $(CROSS_COMPILE)as
 310 LD              = $(CROSS_COMPILE)ld
 311 CC              = $(CROSS_COMPILE)gcc
 312 CPP             = $(CC) -E
 313 AR              = $(CROSS_COMPILE)ar
 314 NM              = $(CROSS_COMPILE)nm
 315 STRIP           = $(CROSS_COMPILE)strip
 316 OBJCOPY         = $(CROSS_COMPILE)objcopy
 317 OBJDUMP         = $(CROSS_COMPILE)objdump
 318 AWK             = awk
 319 GENKSYMS        = scripts/genksyms/genksyms
 320 INSTALLKERNEL  := installkernel
 321 DEPMOD          = /sbin/depmod
 322 KALLSYMS        = scripts/kallsyms
 323 PERL            = perl
 324 CHECK           = sparse
 325
 326 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
 327                   -Wbitwise -Wno-return-void $(CF)
 328 MODFLAGS        = -DMODULE
 329 CFLAGS_MODULE   = $(MODFLAGS)
 330 AFLAGS_MODULE   = $(MODFLAGS)
 331 LDFLAGS_MODULE  = -T $(srctree)/scripts/module-common.lds
 332 CFLAGS_KERNEL   =
 333 AFLAGS_KERNEL   =
 334 CFLAGS_GCOV     = -fprofile-arcs -ftest-coverage
 335
 336
 337 # Use LINUXINCLUDE when you must reference the include/ directory.
 338 # Needed to be compatible with the O= option
 339 LINUXINCLUDE    := -Iinclude \
 340                    $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 341                    -I$(srctree)/arch/$(hdr-arch)/include               \
 342                    -include include/linux/autoconf.h
 343
 344 KBUILD_CPPFLAGS := -D__KERNEL__
 345
 346 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 347                    -fno-strict-aliasing -fno-common \
 348                    -Werror-implicit-function-declaration \
 349                    -Wno-format-security \
 350                    -fno-delete-null-pointer-checks
 351 KBUILD_AFLAGS   := -D__ASSEMBLY__
 352
 353 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
 354 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 355 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 356
 357 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 358 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 359 export CPP AR NM STRIP OBJCOPY OBJDUMP
 360 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
 361 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 362
 363 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 364 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
 365 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 366
 367 # When compiling out-of-tree modules, put MODVERDIR in the module
 368 # tree rather than in the kernel tree. The kernel tree might
 369 # even be read-only.
 370 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 371
 372 # Files to ignore in find ... statements
 373
 374 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
 375 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 376
 377 # ===========================================================================
 378 # Rules shared between *config targets and build targets
 379
 380 # Basic helpers built in scripts/
 381 PHONY += scripts_basic
 382 scripts_basic:
 383         $(Q)$(MAKE) $(build)=scripts/basic
 384
 385 # To avoid any implicit rule to kick in, define an empty command.
 386 scripts/basic/%: scripts_basic ;
 387
 388 PHONY += outputmakefile
 389 # outputmakefile generates a Makefile in the output directory, if using a
 390 # separate output directory. This allows convenient use of make in the
 391 # output directory.
 392 outputmakefile:
 393 ifneq ($(KBUILD_SRC),)
 394         $(Q)ln -fsn $(srctree) source
 395         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 396             $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 397 endif
 398
 399 # To make sure we do not include .config for any of the *config targets
 400 # catch them early, and hand them over to scripts/kconfig/Makefile
 401 # It is allowed to specify more targets when calling make, including
 402 # mixing *config targets and build targets.
 403 # For example 'make oldconfig all'.
 404 # Detect when mixed targets is specified, and make a second invocation
 405 # of make so .config is not included in this case either (for *config).
 406
 407 no-dot-config-targets := clean mrproper distclean \
 408                          cscope TAGS tags help %docs check% \
 409                          include/linux/version.h headers_% \
 410                          kernelrelease kernelversion
 411
 412 config-targets := 0
 413 mixed-targets  := 0
 414 dot-config     := 1
 415
 416 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 417         ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 418                 dot-config := 0
 419         endif
 420 endif
 421
 422 ifeq ($(KBUILD_EXTMOD),)
 423         ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 424                 config-targets := 1
 425                 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 426                         mixed-targets := 1
 427                 endif
 428         endif
 429 endif
 430
 431 ifeq ($(mixed-targets),1)
 432 # ===========================================================================
 433 # We're called with mixed targets (*config and build targets).
 434 # Handle them one by one.
 435
 436 %:: FORCE
 437         $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 438
 439 else
 440 ifeq ($(config-targets),1)
 441 # ===========================================================================
 442 # *config targets only - make sure prerequisites are updated, and descend
 443 # in scripts/kconfig to make the *config target
 444
 445 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 446 # KBUILD_DEFCONFIG may point out an alternative default configuration
 447 # used for 'make defconfig'
 448 include $(srctree)/arch/$(SRCARCH)/Makefile
 449 export KBUILD_DEFCONFIG KBUILD_KCONFIG
 450
 451 config: scripts_basic outputmakefile FORCE
 452         $(Q)mkdir -p include/linux include/config
 453         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 454
 455 %config: scripts_basic outputmakefile FORCE
 456         $(Q)mkdir -p include/linux include/config
 457         $(Q)$(MAKE) $(build)=scripts/kconfig $@
 458
 459 else
 460 # ===========================================================================
 461 # Build targets only - this includes vmlinux, arch specific targets, clean
 462 # targets and others. In general all targets except *config targets.
 463
 464 ifeq ($(KBUILD_EXTMOD),)
 465 # Additional helpers built in scripts/
 466 # Carefully list dependencies so we do not try to build scripts twice
 467 # in parallel
 468 PHONY += scripts
 469 scripts: scripts_basic include/config/auto.conf
 470         $(Q)$(MAKE) $(build)=$(@)
 471
 472 # Objects we will link into vmlinux / subdirs we need to visit
 473 init-y          := init/
 474 drivers-y       := drivers/ sound/ firmware/
 475 net-y           := net/
 476 libs-y          := lib/
 477 core-y          := usr/
 478 endif # KBUILD_EXTMOD
 479
 480 ifeq ($(dot-config),1)
 481 # Read in config
 482 -include include/config/auto.conf
 483
 484 ifeq ($(KBUILD_EXTMOD),)
 485 # Read in dependencies to all Kconfig* files, make sure to run
 486 # oldconfig if changes are detected.
 487 -include include/config/auto.conf.cmd
 488
 489 # To avoid any implicit rule to kick in, define an empty command
 490 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 491
 492 # If .config is newer than include/config/auto.conf, someone tinkered
 493 # with it and forgot to run make oldconfig.
 494 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
 495 # we execute the config step to be sure to catch updated Kconfig files
 496 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 497         $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 498 else
 499 # external modules needs include/linux/autoconf.h and include/config/auto.conf
 500 # but do not care if they are up-to-date. Use auto.conf to trigger the test
 501 PHONY += include/config/auto.conf
 502
 503 include/config/auto.conf:
 504         $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
 505         echo;                                                           \
 506         echo "  ERROR: Kernel configuration is invalid.";               \
 507         echo "         include/linux/autoconf.h or $@ are missing.";    \
 508         echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 509         echo;                                                           \
 510         /bin/false)
 511
 512 endif # KBUILD_EXTMOD
 513
 514 else
 515 # Dummy target needed, because used as prerequisite
 516 include/config/auto.conf: ;
 517 endif # $(dot-config)
 518
 519 # The all: target is the default when no target is given on the
 520 # command line.
 521 # This allow a user to issue only 'make' to build a kernel including modules
 522 # Defaults vmlinux but it is usually overridden in the arch makefile
 523 all: vmlinux
 524
 525 #ifdef CONFIG_MACH_HTCLEO
 526 KBUILD_CFLAGS   += -march=armv7-a -mtune=cortex-a8 -mfpu=vfpv3
 527 #endif
 528
 529 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 530 KBUILD_CFLAGS   += -Os
 531 else
 532 KBUILD_CFLAGS   += -O2
 533 endif
 534
 535 include $(srctree)/arch/$(SRCARCH)/Makefile
 536
 537 ifneq ($(CONFIG_FRAME_WARN),0)
 538 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 539 endif
 540
 541 # Force gcc to behave correct even for buggy distributions
 542 ifndef CONFIG_CC_STACKPROTECTOR
 543 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
 544 endif
 545
 546 ifdef CONFIG_FRAME_POINTER
 547 KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
 548 else
 549 KBUILD_CFLAGS   += -fomit-frame-pointer
 550 endif
 551
 552 ifdef CONFIG_DEBUG_INFO
 553 KBUILD_CFLAGS   += -g
 554 KBUILD_AFLAGS   += -gdwarf-2
 555 endif
 556
 557 ifdef CONFIG_FUNCTION_TRACER
 558 KBUILD_CFLAGS   += -pg
 559 endif
 560
 561 # We trigger additional mismatches with less inlining
 562 ifdef CONFIG_DEBUG_SECTION_MISMATCH
 563 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
 564 endif
 565
 566 # arch Makefile may override CC so keep this after arch Makefile is included
 567 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 568 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 569
 570 # warn about C99 declaration after statement
 571 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 572
 573 # disable pointer signed / unsigned warnings in gcc 4.0
 574 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 575
 576 # disable invalid "can't wrap" optimizations for signed / pointers
 577 KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
 578
 579 # revert to pre-gcc-4.4 behaviour of .eh_frame
 580 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 581
 582 # conserve stack if available
 583 KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
 584
 585 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
 586 # But warn user when we do so
 587 warn-assign = \
 588 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
 589
 590 ifneq ($(KCPPFLAGS),)
 591         $(call warn-assign,CPPFLAGS)
 592         KBUILD_CPPFLAGS += $(KCPPFLAGS)
 593 endif
 594 ifneq ($(KAFLAGS),)
 595         $(call warn-assign,AFLAGS)
 596         KBUILD_AFLAGS += $(KAFLAGS)
 597 endif
 598 ifneq ($(KCFLAGS),)
 599         $(call warn-assign,CFLAGS)
 600         KBUILD_CFLAGS += $(KCFLAGS)
 601 endif
 602
 603 # Use --build-id when available.
 604 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 605                               $(call cc-ldoption, -Wl$(comma)--build-id,))
 606 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 607 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 608
 609 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
 610 LDFLAGS_vmlinux += $(call ld-option, -X,)
 611 endif
 612
 613 # Default kernel image to build when no specific target is given.
 614 # KBUILD_IMAGE may be overruled on the command line or
 615 # set in the environment
 616 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
 617 # this default value
 618 export KBUILD_IMAGE ?= vmlinux
 619
 620 #
 621 # INSTALL_PATH specifies where to place the updated kernel and system map
 622 # images. Default is /boot, but you can set it to other values
 623 export  INSTALL_PATH ?= /boot
 624
 625 #
 626 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 627 # relocations required by build roots.  This is not defined in the
 628 # makefile but the argument can be passed to make if needed.
 629 #
 630
 631 MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 632 export MODLIB
 633
 634 #
 635 #  INSTALL_MOD_STRIP, if defined, will cause modules to be
 636 #  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 637 #  the default option --strip-debug will be used.  Otherwise,
 638 #  INSTALL_MOD_STRIP will used as the options to the strip command.
 639
 640 ifdef INSTALL_MOD_STRIP
 641 ifeq ($(INSTALL_MOD_STRIP),1)
 642 mod_strip_cmd = $(STRIP) --strip-debug
 643 else
 644 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 645 endif # INSTALL_MOD_STRIP=1
 646 else
 647 mod_strip_cmd = true
 648 endif # INSTALL_MOD_STRIP
 649 export mod_strip_cmd
 650
 651
 652 ifeq ($(KBUILD_EXTMOD),)
 653 core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 654
 655 vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 656                      $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 657                      $(net-y) $(net-m) $(libs-y) $(libs-m)))
 658
 659 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 660                      $(init-n) $(init-) \
 661                      $(core-n) $(core-) $(drivers-n) $(drivers-) \
 662                      $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 663
 664 init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 665 core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 666 drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 667 net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 668 libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 669 libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 670 libs-y          := $(libs-y1) $(libs-y2)
 671
 672 # Build vmlinux
 673 # ---------------------------------------------------------------------------
 674 # vmlinux is built from the objects selected by $(vmlinux-init) and
 675 # $(vmlinux-main). Most are built-in.o files from top-level directories
 676 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
 677 # Ordering when linking is important, and $(vmlinux-init) must be first.
 678 #
 679 # vmlinux
 680 #   ^
 681 #   |
 682 #   +-< $(vmlinux-init)
 683 #   |   +--< init/version.o + more
 684 #   |
 685 #   +--< $(vmlinux-main)
 686 #   |    +--< driver/built-in.o mm/built-in.o + more
 687 #   |
 688 #   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 689 #
 690 # vmlinux version (uname -v) cannot be updated during normal
 691 # descending-into-subdirs phase since we do not yet know if we need to
 692 # update vmlinux.
 693 # Therefore this step is delayed until just before final link of vmlinux -
 694 # except in the kallsyms case where it is done just before adding the
 695 # symbols to the kernel.
 696 #
 697 # System.map is generated to document addresses of all kernel symbols
 698
 699 vmlinux-init := $(head-y) $(init-y)
 700 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 701 vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 702 vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
 703 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 704
 705 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
 706 # May be overridden by arch/$(ARCH)/Makefile
 707 quiet_cmd_vmlinux__ ?= LD      $@
 708       cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 709       -T $(vmlinux-lds) $(vmlinux-init)                          \
 710       --start-group $(vmlinux-main) --end-group                  \
 711       $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
 712
 713 # Generate new vmlinux version
 714 quiet_cmd_vmlinux_version = GEN     .version
 715       cmd_vmlinux_version = set -e;                     \
 716         if [ ! -r .version ]; then                      \
 717           rm -f .version;                               \
 718           echo 1 >.version;                             \
 719         else                                            \
 720           mv .version .old_version;                     \
 721           expr 0$$(cat .old_version) + 1 >.version;     \
 722         fi;                                             \
 723         $(MAKE) $(build)=init
 724
 725 # Generate System.map
 726 quiet_cmd_sysmap = SYSMAP
 727       cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 728
 729 # Link of vmlinux
 730 # If CONFIG_KALLSYMS is set .version is already updated
 731 # Generate System.map and verify that the content is consistent
 732 # Use + in front of the vmlinux_version rule to silent warning with make -j2
 733 # First command is ':' to allow us to use + in front of the rule
 734 define rule_vmlinux__
 735         :
 736         $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 737
 738         $(call cmd,vmlinux__)
 739         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 740
 741         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 742           echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 743         $(cmd_sysmap) $@ System.map;                                         \
 744         if [ $$? -ne 0 ]; then                                               \
 745                 rm -f $@;                                                    \
 746                 /bin/false;                                                  \
 747         fi;
 748         $(verify_kallsyms)
 749 endef
 750
 751
 752 ifdef CONFIG_KALLSYMS
 753 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 754 # It's a three stage process:
 755 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 756 #   empty
 757 #   Running kallsyms on that gives us .tmp_kallsyms1.o with
 758 #   the right size - vmlinux version (uname -v) is updated during this step
 759 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 760 #   but due to the added section, some addresses have shifted.
 761 #   From here, we generate a correct .tmp_kallsyms2.o
 762 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 763 # o Verify that the System.map from vmlinux matches the map from
 764 #   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 765 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 766 #   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 767 #   temporary bypass to allow the kernel to be built while the
 768 #   maintainers work out what went wrong with kallsyms.
 769
 770 ifdef CONFIG_KALLSYMS_EXTRA_PASS
 771 last_kallsyms := 3
 772 else
 773 last_kallsyms := 2
 774 endif
 775
 776 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 777
 778 define verify_kallsyms
 779         $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 780           echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 781           $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 782         $(Q)cmp -s System.map .tmp_System.map ||                             \
 783                 (echo Inconsistent kallsyms data;                            \
 784                  echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 785                  rm .tmp_kallsyms* ; /bin/false )
 786 endef
 787
 788 # Update vmlinux version before link
 789 # Use + in front of this rule to silent warning about make -j1
 790 # First command is ':' to allow us to use + in front of this rule
 791 cmd_ksym_ld = $(cmd_vmlinux__)
 792 define rule_ksym_ld
 793         :
 794         +$(call cmd,vmlinux_version)
 795         $(call cmd,vmlinux__)
 796         $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 797 endef
 798
 799 # Generate .S file with all kernel symbols
 800 quiet_cmd_kallsyms = KSYM    $@
 801       cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 802                      $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 803
 804 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 805         $(call if_changed_dep,as_o_S)
 806
 807 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 808         $(call cmd,kallsyms)
 809
 810 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 811 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 812         $(call if_changed_rule,ksym_ld)
 813
 814 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 815         $(call if_changed,vmlinux__)
 816
 817 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 818         $(call if_changed,vmlinux__)
 819
 820 # Needs to visit scripts/ before $(KALLSYMS) can be used.
 821 $(KALLSYMS): scripts ;
 822
 823 # Generate some data for debugging strange kallsyms problems
 824 debug_kallsyms: .tmp_map$(last_kallsyms)
 825
 826 .tmp_map%: .tmp_vmlinux% FORCE
 827         ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 828
 829 .tmp_map3: .tmp_map2
 830
 831 .tmp_map2: .tmp_map1
 832
 833 endif # ifdef CONFIG_KALLSYMS
 834
 835 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 836 # relevant sections renamed as per the linker script.
 837 quiet_cmd_vmlinux-modpost = LD      $@
 838       cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 839          $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
 840          $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 841 define rule_vmlinux-modpost
 842         :
 843         +$(call cmd,vmlinux-modpost)
 844         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 845         $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
 846 endef
 847
 848 # vmlinux image - including updated kernel symbols
 849 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
 850 ifdef CONFIG_HEADERS_CHECK
 851         $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 852 endif
 853 ifdef CONFIG_SAMPLES
 854         $(Q)$(MAKE) $(build)=samples
 855 endif
 856 ifdef CONFIG_BUILD_DOCSRC
 857         $(Q)$(MAKE) $(build)=Documentation
 858 endif
 859         $(call vmlinux-modpost)
 860         $(call if_changed_rule,vmlinux__)
 861         $(Q)rm -f .old_version
 862
 863 # build vmlinux.o first to catch section mismatch errors early
 864 ifdef CONFIG_KALLSYMS
 865 .tmp_vmlinux1: vmlinux.o
 866 endif
 867
 868 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
 869 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
 870         $(call if_changed_rule,vmlinux-modpost)
 871
 872 # The actual objects are generated when descending,
 873 # make sure no implicit rule kicks in
 874 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 875
 876 # Handle descending into subdirectories listed in $(vmlinux-dirs)
 877 # Preset locale variables to speed up the build process. Limit locale
 878 # tweaks to this spot to avoid wrong language settings when running
 879 # make menuconfig etc.
 880 # Error messages still appears in the original language
 881
 882 PHONY += $(vmlinux-dirs)
 883 $(vmlinux-dirs): prepare scripts
 884         $(Q)$(MAKE) $(build)=$@
 885
 886 # Build the kernel release string
 887 #
 888 # The KERNELRELEASE value built here is stored in the file
 889 # include/config/kernel.release, and is used when executing several
 890 # make targets, such as "make install" or "make modules_install."
 891 #
 892 # The eventual kernel release string consists of the following fields,
 893 # shown in a hierarchical format to show how smaller parts are concatenated
 894 # to form the larger and final value, with values coming from places like
 895 # the Makefile, kernel config options, make command line options and/or
 896 # SCM tag information.
 897 #
 898 #       $(KERNELVERSION)
 899 #         $(VERSION)                    eg, 2
 900 #         $(PATCHLEVEL)                 eg, 6
 901 #         $(SUBLEVEL)                   eg, 18
 902 #         $(EXTRAVERSION)               eg, -rc6
 903 #       $(localver-full)
 904 #         $(localver)
 905 #           localversion*               (files without backups, containing '~')
 906 #           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 907 #         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 908 #           ./scripts/setlocalversion   (SCM tag, if one exists)
 909 #           $(LOCALVERSION)             (from make command line if provided)
 910 #
 911 #  Note how the final $(localver-auto) string is included *only* if the
 912 # kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 913 # moment, only git is supported but other SCMs can edit the script
 914 # scripts/setlocalversion and add the appropriate checks as needed.
 915
 916 pattern = ".*/localversion[^~]*"
 917 string  = $(shell cat /dev/null \
 918            `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 919
 920 localver = $(subst $(space),, $(string) \
 921                               $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 922
 923 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 924 # and if the SCM is know a tag from the SCM is appended.
 925 # The appended tag is determined by the SCM used.
 926 #
 927 # .scmversion is used when generating rpm packages so we do not loose
 928 # the version information from the SCM when we do the build of the kernel
 929 # from the copied source
 930 ifdef CONFIG_LOCALVERSION_AUTO
 931
 932 ifeq ($(wildcard .scmversion),)
 933         _localver-auto = $(shell $(CONFIG_SHELL) \
 934                          $(srctree)/scripts/setlocalversion $(srctree))
 935 else
 936         _localver-auto = $(shell cat .scmversion 2> /dev/null)
 937 endif
 938
 939         localver-auto  = $(LOCALVERSION)$(_localver-auto)
 940 endif
 941
 942 localver-full = $(localver)$(localver-auto)
 943
 944 # Store (new) KERNELRELASE string in include/config/kernel.release
 945 kernelrelease = $(KERNELVERSION)$(localver-full)
 946 include/config/kernel.release: include/config/auto.conf FORCE
 947         $(Q)rm -f $@
 948         $(Q)echo $(kernelrelease) > $@
 949
 950
 951 # Things we need to do before we recursively start building the kernel
 952 # or the modules are listed in "prepare".
 953 # A multi level approach is used. prepareN is processed before prepareN-1.
 954 # archprepare is used in arch Makefiles and when processed asm symlink,
 955 # version.h and scripts_basic is processed / created.
 956
 957 # Listed in dependency order
 958 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 959
 960 # prepare3 is used to check if we are building in a separate output directory,
 961 # and if so do:
 962 # 1) Check that make has not been executed in the kernel src $(srctree)
 963 # 2) Create the include2 directory, used for the second asm symlink
 964 prepare3: include/config/kernel.release
 965 ifneq ($(KBUILD_SRC),)
 966         @$(kecho) '  Using $(srctree) as source for kernel'
 967         $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 968                 echo "  $(srctree) is not clean, please run 'make mrproper'";\
 969                 echo "  in the '$(srctree)' directory.";\
 970                 /bin/false; \
 971         fi;
 972         $(Q)if [ ! -d include2 ]; then                                  \
 973             mkdir -p include2;                                          \
 974             ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
 975         fi
 976 endif
 977
 978 # prepare2 creates a makefile if using a separate output directory
 979 prepare2: prepare3 outputmakefile
 980
 981 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 982                    include/asm include/config/auto.conf
 983         $(cmd_crmodverdir)
 984
 985 archprepare: prepare1 scripts_basic
 986
 987 prepare0: archprepare FORCE
 988         $(Q)$(MAKE) $(build)=.
 989         $(Q)$(MAKE) $(build)=. missing-syscalls
 990
 991 # All the preparing..
 992 prepare: prepare0
 993
 994 # The asm symlink changes when $(ARCH) changes.
 995 # Detect this and ask user to run make mrproper
 996 # If asm is a stale symlink (point to dir that does not exist) remove it
 997 define check-symlink
 998         set -e;                                                            \
 999         if [ -L include/asm ]; then                                        \
1000                 asmlink=`readlink include/asm | cut -d '-' -f 2`;          \
1001                 if [ "$$asmlink" != "$(SRCARCH)" ]; then                   \
1002                         echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
1003                         echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
1004                         exit 1;                                            \
1005                 fi;                                                        \
1006                 test -e $$asmlink || rm include/asm;                       \
1007         elif [ -d include/asm ]; then                                      \
1008                 echo "ERROR: $@ is a directory but a symlink was expected";\
1009                 exit 1;                                                    \
1010         fi
1011 endef
1012
1013 # We create the target directory of the symlink if it does
1014 # not exist so the test in check-symlink works and we have a
1015 # directory for generated filesas used by some architectures.
1016 define create-symlink
1017         if [ ! -L include/asm ]; then                                      \
1018                         $(kecho) '  SYMLINK $@ -> include/asm-$(SRCARCH)'; \
1019                         if [ ! -d include/asm-$(SRCARCH) ]; then           \
1020                                 mkdir -p include/asm-$(SRCARCH);           \
1021                         fi;                                                \
1022                         ln -fsn asm-$(SRCARCH) $@;                         \
1023         fi
1024 endef
1025
1026 include/asm: FORCE
1027         $(Q)$(check-symlink)
1028         $(Q)$(create-symlink)
1029
1030 # Generate some files
1031 # ---------------------------------------------------------------------------
1032
1033 # KERNELRELEASE can change from a few different places, meaning version.h
1034 # needs to be updated, so this check is forced on all builds
1035
1036 uts_len := 64
1037 define filechk_utsrelease.h
1038         if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1039           echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1040           exit 1;                                                         \
1041         fi;                                                               \
1042         (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1043 endef
1044
1045 define filechk_version.h
1046         (echo \#define LINUX_VERSION_CODE $(shell                             \
1047         expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
1048         echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1049 endef
1050
1051 include/linux/version.h: $(srctree)/Makefile FORCE
1052         $(call filechk,version.h)
1053
1054 include/linux/utsrelease.h: include/config/kernel.release FORCE
1055         $(call filechk,utsrelease.h)
1056
1057 PHONY += headerdep
1058 headerdep:
1059         $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1060
1061 # ---------------------------------------------------------------------------
1062
1063 PHONY += depend dep
1064 depend dep:
1065         @echo '*** Warning: make $@ is unnecessary now.'
1066
1067 # ---------------------------------------------------------------------------
1068 # Firmware install
1069 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1070 export INSTALL_FW_PATH
1071
1072 PHONY += firmware_install
1073 firmware_install: FORCE
1074         @mkdir -p $(objtree)/firmware
1075         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1076
1077 # ---------------------------------------------------------------------------
1078 # Kernel headers
1079
1080 #Default location for installed headers
1081 export INSTALL_HDR_PATH = $(objtree)/usr
1082
1083 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1084 # Find out where the Kbuild file is located to support
1085 # arch/$(ARCH)/include/asm
1086 hdr-dir = $(strip                                                         \
1087           $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1088                arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1089
1090 # If we do an all arch process set dst to asm-$(hdr-arch)
1091 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1092
1093 PHONY += __headers
1094 __headers: include/linux/version.h scripts_basic FORCE
1095         $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1096
1097 PHONY += headers_install_all
1098 headers_install_all:
1099         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1100
1101 PHONY += headers_install
1102 headers_install: __headers
1103         $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1104         $(error Headers not exportable for the $(SRCARCH) architecture))
1105         $(Q)$(MAKE) $(hdr-inst)=include
1106         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1107
1108 PHONY += headers_check_all
1109 headers_check_all: headers_install_all
1110         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1111
1112 PHONY += headers_check
1113 headers_check: headers_install
1114         $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1115         $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1116
1117 # ---------------------------------------------------------------------------
1118 # Modules
1119
1120 ifdef CONFIG_MODULES
1121
1122 # By default, build modules as well
1123
1124 all: modules
1125
1126 #       Build modules
1127 #
1128 #       A module can be listed more than once in obj-m resulting in
1129 #       duplicate lines in modules.order files.  Those are removed
1130 #       using awk while concatenating to the final file.
1131
1132 PHONY += modules
1133 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1134         $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1135         @$(kecho) '  Building modules, stage 2.';
1136         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1137         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1138
1139
1140 # Target to prepare building external modules
1141 PHONY += modules_prepare
1142 modules_prepare: prepare scripts
1143
1144 # Target to install modules
1145 PHONY += modules_install
1146 modules_install: _modinst_ _modinst_post
1147
1148 PHONY += _modinst_
1149 _modinst_:
1150         @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1151                 echo "Warning: you may need to install module-init-tools"; \
1152                 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1153                 sleep 1; \
1154         fi
1155         @rm -rf $(MODLIB)/kernel
1156         @rm -f $(MODLIB)/source
1157         @mkdir -p $(MODLIB)/kernel
1158         @ln -s $(srctree) $(MODLIB)/source
1159         @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1160                 rm -f $(MODLIB)/build ; \
1161                 ln -s $(objtree) $(MODLIB)/build ; \
1162         fi
1163         @cp -f $(objtree)/modules.order $(MODLIB)/
1164         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1165
1166 # This depmod is only for convenience to give the initial
1167 # boot a modules.dep even before / is mounted read-write.  However the
1168 # boot script depmod is the master version.
1169 PHONY += _modinst_post
1170 _modinst_post: _modinst_
1171         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1172         $(call cmd,depmod)
1173
1174 else # CONFIG_MODULES
1175
1176 # Modules not configured
1177 # ---------------------------------------------------------------------------
1178
1179 modules modules_install: FORCE
1180         @echo
1181         @echo "The present kernel configuration has modules disabled."
1182         @echo "Type 'make config' and enable loadable module support."
1183         @echo "Then build a kernel with module support enabled."
1184         @echo
1185         @exit 1
1186
1187 endif # CONFIG_MODULES
1188
1189 ###
1190 # Cleaning is done on three levels.
1191 # make clean     Delete most generated files
1192 #                Leave enough to build external modules
1193 # make mrproper  Delete the current configuration, and all generated files
1194 # make distclean Remove editor backup files, patch leftover files and the like
1195
1196 # Directories & files removed with 'make clean'
1197 CLEAN_DIRS  += $(MODVERDIR)
1198 CLEAN_FILES +=  vmlinux System.map \
1199                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1200
1201 # Directories & files removed with 'make mrproper'
1202 MRPROPER_DIRS  += include/config include2 usr/include include/generated
1203 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1204                   include/linux/autoconf.h include/linux/version.h      \
1205                   include/linux/utsrelease.h                            \
1206                   include/linux/bounds.h include/asm*/asm-offsets.h     \
1207                   Module.symvers Module.markers tags TAGS cscope*
1208
1209 # clean - Delete most, but leave enough to build external modules
1210 #
1211 clean: rm-dirs  := $(CLEAN_DIRS)
1212 clean: rm-files := $(CLEAN_FILES)
1213 clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1214
1215 PHONY += $(clean-dirs) clean archclean
1216 $(clean-dirs):
1217         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1218
1219 clean: archclean $(clean-dirs)
1220         $(call cmd,rmdirs)
1221         $(call cmd,rmfiles)
1222         @find . $(RCS_FIND_IGNORE) \
1223                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1224                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1225                 -o -name '*.symtypes' -o -name 'modules.order' \
1226                 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
1227                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1228
1229 # mrproper - Delete all generated files, including .config
1230 #
1231 mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1232 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1233 mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1234
1235 PHONY += $(mrproper-dirs) mrproper archmrproper
1236 $(mrproper-dirs):
1237         $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1238
1239 mrproper: clean archmrproper $(mrproper-dirs)
1240         $(call cmd,rmdirs)
1241         $(call cmd,rmfiles)
1242
1243 # distclean
1244 #
1245 PHONY += distclean
1246
1247 distclean: mrproper
1248         @find $(srctree) $(RCS_FIND_IGNORE) \
1249                 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1250                 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1251                 -o -name '.*.rej' -o -size 0 \
1252                 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1253                 -type f -print | xargs rm -f
1254
1255
1256 # Packaging of the kernel to various formats
1257 # ---------------------------------------------------------------------------
1258 # rpm target kept for backward compatibility
1259 package-dir     := $(srctree)/scripts/package
1260
1261 %pkg: include/config/kernel.release FORCE
1262         $(Q)$(MAKE) $(build)=$(package-dir) $@
1263 rpm: include/config/kernel.release FORCE
1264         $(Q)$(MAKE) $(build)=$(package-dir) $@
1265
1266
1267 # Brief documentation of the typical targets used
1268 # ---------------------------------------------------------------------------
1269
1270 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1271 boards := $(notdir $(boards))
1272 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1273 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1274
1275 help:
1276         @echo  'Cleaning targets:'
1277         @echo  '  clean           - Remove most generated files but keep the config and'
1278         @echo  '                    enough build support to build external modules'
1279         @echo  '  mrproper        - Remove all generated files + config + various backup files'
1280         @echo  '  distclean       - mrproper + remove editor backup and patch files'
1281         @echo  ''
1282         @echo  'Configuration targets:'
1283         @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1284         @echo  ''
1285         @echo  'Other generic targets:'
1286         @echo  '  all             - Build all targets marked with [*]'
1287         @echo  '* vmlinux         - Build the bare kernel'
1288         @echo  '* modules         - Build all modules'
1289         @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1290         @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1291         @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1292         @echo  '  dir/            - Build all files in dir and below'
1293         @echo  '  dir/file.[ois]  - Build specified target only'
1294         @echo  '  dir/file.ko     - Build module including final link'
1295         @echo  '  modules_prepare - Set up for building external modules'
1296         @echo  '  tags/TAGS       - Generate tags file for editors'
1297         @echo  '  cscope          - Generate cscope index'
1298         @echo  '  kernelrelease   - Output the release version string'
1299         @echo  '  kernelversion   - Output the version stored in Makefile'
1300         @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1301          echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1302          echo  ''
1303         @echo  'Static analysers'
1304         @echo  '  checkstack      - Generate a list of stack hogs'
1305         @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1306         @echo  '  versioncheck    - Sanity check on version.h usage'
1307         @echo  '  includecheck    - Check for duplicate included header files'
1308         @echo  '  export_report   - List the usages of all exported symbols'
1309         @echo  '  headers_check   - Sanity check on exported headers'
1310         @echo  '  headerdep       - Detect inclusion cycles in headers'; \
1311          echo  ''
1312         @echo  'Kernel packaging:'
1313         @$(MAKE) $(build)=$(package-dir) help
1314         @echo  ''
1315         @echo  'Documentation targets:'
1316         @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1317         @echo  ''
1318         @echo  'Architecture specific targets ($(SRCARCH)):'
1319         @$(if $(archhelp),$(archhelp),\
1320                 echo '  No architecture specific help defined for $(SRCARCH)')
1321         @echo  ''
1322         @$(if $(boards), \
1323                 $(foreach b, $(boards), \
1324                 printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1325                 echo '')
1326         @$(if $(board-dirs), \
1327                 $(foreach b, $(board-dirs), \
1328                 printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1329                 printf "  %-16s - Show all of the above\\n" help-boards; \
1330                 echo '')
1331
1332         @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1333         @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1334         @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1335         @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1336         @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1337         @echo  ''
1338         @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1339         @echo  'For further info see the ./README file'
1340
1341
1342 help-board-dirs := $(addprefix help-,$(board-dirs))
1343
1344 help-boards: $(help-board-dirs)
1345
1346 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1347
1348 $(help-board-dirs): help-%:
1349         @echo  'Architecture specific targets ($(SRCARCH) $*):'
1350         @$(if $(boards-per-dir), \
1351                 $(foreach b, $(boards-per-dir), \
1352                 printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1353                 echo '')
1354
1355
1356 # Documentation targets
1357 # ---------------------------------------------------------------------------
1358 %docs: scripts_basic FORCE
1359         $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1360
1361 else # KBUILD_EXTMOD
1362
1363 ###
1364 # External module support.
1365 # When building external modules the kernel used as basis is considered
1366 # read-only, and no consistency checks are made and the make
1367 # system is not used on the basis kernel. If updates are required
1368 # in the basis kernel ordinary make commands (without M=...) must
1369 # be used.
1370 #
1371 # The following are the only valid targets when building external
1372 # modules.
1373 # make M=dir clean     Delete all automatically generated files
1374 # make M=dir modules   Make all modules in specified dir
1375 # make M=dir           Same as 'make M=dir modules'
1376 # make M=dir modules_install
1377 #                      Install the modules built in the module directory
1378 #                      Assumes install directory is already created
1379
1380 # We are always building modules
1381 KBUILD_MODULES := 1
1382 PHONY += crmodverdir
1383 crmodverdir:
1384         $(cmd_crmodverdir)
1385
1386 PHONY += $(objtree)/Module.symvers
1387 $(objtree)/Module.symvers:
1388         @test -e $(objtree)/Module.symvers || ( \
1389         echo; \
1390         echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1391         echo "           is missing; modules will have no dependencies and modversions."; \
1392         echo )
1393
1394 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1395 PHONY += $(module-dirs) modules
1396 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1397         $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1398
1399 modules: $(module-dirs)
1400         @$(kecho) '  Building modules, stage 2.';
1401         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1402
1403 PHONY += modules_install
1404 modules_install: _emodinst_ _emodinst_post
1405
1406 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1407 PHONY += _emodinst_
1408 _emodinst_:
1409         $(Q)mkdir -p $(MODLIB)/$(install-dir)
1410         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1411
1412 PHONY += _emodinst_post
1413 _emodinst_post: _emodinst_
1414         $(call cmd,depmod)
1415
1416 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1417
1418 PHONY += $(clean-dirs) clean
1419 $(clean-dirs):
1420         $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1421
1422 clean:  rm-dirs := $(MODVERDIR)
1423 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1424                    $(KBUILD_EXTMOD)/Module.markers \
1425                    $(KBUILD_EXTMOD)/modules.order
1426 clean: $(clean-dirs)
1427         $(call cmd,rmdirs)
1428         $(call cmd,rmfiles)
1429         @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1430                 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1431                 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1432                 -o -name '*.gcno' \) -type f -print | xargs rm -f
1433
1434 help:
1435         @echo  '  Building external modules.'
1436         @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1437         @echo  ''
1438         @echo  '  modules         - default target, build the module(s)'
1439         @echo  '  modules_install - install the module'
1440         @echo  '  clean           - remove generated files in module directory only'
1441         @echo  ''
1442
1443 # Dummies...
1444 PHONY += prepare scripts
1445 prepare: ;
1446 scripts: ;
1447 endif # KBUILD_EXTMOD
1448
1449 # Generate tags for editors
1450 # ---------------------------------------------------------------------------
1451 quiet_cmd_tags = GEN     $@
1452       cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1453
1454 tags TAGS cscope: FORCE
1455         $(call cmd,tags)
1456
1457 # Scripts to check various things for consistency
1458 # ---------------------------------------------------------------------------
1459
1460 includecheck:
1461         find * $(RCS_FIND_IGNORE) \
1462                 -name '*.[hcS]' -type f -print | sort \
1463                 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1464
1465 versioncheck:
1466         find * $(RCS_FIND_IGNORE) \
1467                 -name '*.[hcS]' -type f -print | sort \
1468                 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1469
1470 namespacecheck:
1471         $(PERL) $(srctree)/scripts/namespace.pl
1472
1473 export_report:
1474         $(PERL) $(srctree)/scripts/export_report.pl
1475
1476 endif #ifeq ($(config-targets),1)
1477 endif #ifeq ($(mixed-targets),1)
1478
1479 PHONY += checkstack kernelrelease kernelversion
1480
1481 # UML needs a little special treatment here.  It wants to use the host
1482 # toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1483 # else wants $(ARCH), including people doing cross-builds, which means
1484 # that $(SUBARCH) doesn't work here.
1485 ifeq ($(ARCH), um)
1486 CHECKSTACK_ARCH := $(SUBARCH)
1487 else
1488 CHECKSTACK_ARCH := $(ARCH)
1489 endif
1490 checkstack:
1491         $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1492         $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1493
1494 kernelrelease:
1495         $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1496         $(error kernelrelease not valid - run 'make prepare' to update it))
1497 kernelversion:
1498         @echo $(KERNELVERSION)
1499
1500 # Single targets
1501 # ---------------------------------------------------------------------------
1502 # Single targets are compatible with:
1503 # - build with mixed source and output
1504 # - build with separate output dir 'make O=...'
1505 # - external modules
1506 #
1507 #  target-dir => where to store outputfile
1508 #  build-dir  => directory in kernel source tree to use
1509
1510 ifeq ($(KBUILD_EXTMOD),)
1511         build-dir  = $(patsubst %/,%,$(dir $@))
1512         target-dir = $(dir $@)
1513 else
1514         zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1515         build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1516         target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1517 endif
1518
1519 %.s: %.c prepare scripts FORCE
1520         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1521 %.i: %.c prepare scripts FORCE
1522         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1523 %.o: %.c prepare scripts FORCE
1524         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1525 %.lst: %.c prepare scripts FORCE
1526         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1527 %.s: %.S prepare scripts FORCE
1528         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1529 %.o: %.S prepare scripts FORCE
1530         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1531 %.symtypes: %.c prepare scripts FORCE
1532         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1533
1534 # Modules
1535 /: prepare scripts FORCE
1536         $(cmd_crmodverdir)
1537         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1538         $(build)=$(build-dir)
1539 %/: prepare scripts FORCE
1540         $(cmd_crmodverdir)
1541         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1542         $(build)=$(build-dir)
1543 %.ko: prepare scripts FORCE
1544         $(cmd_crmodverdir)
1545         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1546         $(build)=$(build-dir) $(@:.ko=.o)
1547         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1548
1549 # FIXME Should go into a make.lib or something
1550 # ===========================================================================
1551
1552 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1553       cmd_rmdirs = rm -rf $(rm-dirs)
1554
1555 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1556       cmd_rmfiles = rm -f $(rm-files)
1557
1558 # Run depmod only if we have System.map and depmod is executable
1559 quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1560       cmd_depmod = \
1561         if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1562                 $(DEPMOD) -ae -F System.map                                     \
1563                 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) )     \
1564                 $(KERNELRELEASE);                                               \
1565         fi
1566
1567 # Create temporary dir for module support files
1568 # clean it up only when building all modules
1569 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1570                   $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1571
1572 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1573           $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1574           $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1575
1576 quiet_cmd_as_o_S = AS      $@
1577 cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1578
1579 # read all saved command lines
1580
1581 targets := $(wildcard $(sort $(targets)))
1582 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1583
1584 ifneq ($(cmd_files),)
1585   $(cmd_files): ;       # Do not try to update included dependency files
1586   include $(cmd_files)
1587 endif
1588
1589 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1590 # Usage:
1591 # $(Q)$(MAKE) $(clean)=dir
1592 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1593
1594 endif   # skip-makefile
1595
1596 PHONY += FORCE
1597 FORCE:
1598
1599 # Declare the contents of the .PHONY variable as phony.  We keep that
1600 # information in a variable so we can use it in if_changed and friends.
1601 .PHONY: $(PHONY)