Makefile 54.4 KB
Newer Older
L
Linus Torvalds 已提交
1 2
VERSION = 2
PATCHLEVEL = 6
L
Linus Torvalds 已提交
3
SUBLEVEL = 26
L
Linus Torvalds 已提交
4
EXTRAVERSION =
L
Linus Torvalds 已提交
5
NAME = Rotary Wombat
L
Linus Torvalds 已提交
6 7 8 9 10 11 12

# *DOCUMENTATION*
# To see a list of typical targets execute "make help"
# More info can be located in ./README
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.

13 14
# Do not:
# o  use make's built-in rules and variables
15
#    (this increases performance and avoids hard-to-debug behaviour);
16 17
# o  print "Entering directory ...";
MAKEFLAGS += -rR --no-print-directory
L
Linus Torvalds 已提交
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

# We are using a recursive build, so we need to do a little thinking
# to get the ordering right.
#
# Most importantly: sub-Makefiles should only ever modify files in
# their own directory. If in some directory we have a dependency on
# a file in another dir (which doesn't happen often, but it's often
# unavoidable when linking the built-in.o targets which finally
# turn into vmlinux), we will call a sub make in that other dir, and
# after that we are sure that everything which is in that other dir
# is now up to date.
#
# The only cases where we need to modify files which have global
# effects are thus separated out and done before the recursive
# descending is started. They are now explicitly listed as the
# prepare rule.

# To put more focus on warnings, be less verbose as default
# Use 'make V=1' to see the full commands

ifdef V
  ifeq ("$(origin V)", "command line")
    KBUILD_VERBOSE = $(V)
  endif
endif
ifndef KBUILD_VERBOSE
  KBUILD_VERBOSE = 0
endif

47 48 49 50 51 52 53 54 55
# Call a source code checker (by default, "sparse") as part of the
# C compilation.
#
# Use 'make C=1' to enable checking of only re-compiled files.
# Use 'make C=2' to enable checking of *all* source files, regardless
# of whether they are re-compiled or not.
#
# See the file "Documentation/sparse.txt" for more details, including
# where to get the "sparse" utility.
L
Linus Torvalds 已提交
56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83

ifdef C
  ifeq ("$(origin C)", "command line")
    KBUILD_CHECKSRC = $(C)
  endif
endif
ifndef KBUILD_CHECKSRC
  KBUILD_CHECKSRC = 0
endif

# Use make M=dir to specify directory of external module to build
# Old syntax make ... SUBDIRS=$PWD is still supported
# Setting the environment variable KBUILD_EXTMOD take precedence
ifdef SUBDIRS
  KBUILD_EXTMOD ?= $(SUBDIRS)
endif
ifdef M
  ifeq ("$(origin M)", "command line")
    KBUILD_EXTMOD := $(M)
  endif
endif


# kbuild supports saving output files in a separate directory.
# To locate output files in a separate directory two syntaxes are supported.
# In both cases the working directory must be the root of the kernel src.
# 1) O=
# Use "make O=dir/to/store/output/files/"
S
Sam Ravnborg 已提交
84
#
L
Linus Torvalds 已提交
85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107
# 2) Set KBUILD_OUTPUT
# Set the environment variable KBUILD_OUTPUT to point to the directory
# where the output files shall be placed.
# export KBUILD_OUTPUT=dir/to/store/output/files/
# make
#
# The O= assignment takes precedence over the KBUILD_OUTPUT environment
# variable.


# KBUILD_SRC is set on invocation of make in OBJ directory
# KBUILD_SRC is not intended to be used by the regular user (for now)
ifeq ($(KBUILD_SRC),)

# OK, Make called in directory where kernel src resides
# Do we want to locate output files in a separate directory?
ifdef O
  ifeq ("$(origin O)", "command line")
    KBUILD_OUTPUT := $(O)
  endif
endif

# That's our default target when none is given on the command line
108
PHONY := _all
L
Linus Torvalds 已提交
109 110
_all:

111 112 113
# Cancel implicit rules on top Makefile
$(CURDIR)/Makefile Makefile: ;

L
Linus Torvalds 已提交
114 115 116 117 118 119 120 121
ifneq ($(KBUILD_OUTPUT),)
# Invoke a second make in the output directory, passing relevant variables
# check that the output directory actually exists
saved-output := $(KBUILD_OUTPUT)
KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
$(if $(KBUILD_OUTPUT),, \
     $(error output directory "$(saved-output)" does not exist))

122 123
PHONY += $(MAKECMDGOALS) sub-make

124
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
125 126 127
	$(Q)@:

sub-make: FORCE
128 129
	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
	KBUILD_SRC=$(CURDIR) \
130 131
	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
	$(filter-out _all sub-make,$(MAKECMDGOALS))
L
Linus Torvalds 已提交
132 133 134 135 136 137 138 139 140 141 142

# Leave processing to above invocation of make
skip-makefile := 1
endif # ifneq ($(KBUILD_OUTPUT),)
endif # ifeq ($(KBUILD_SRC),)

# We process the rest of the Makefile if this is the final invocation of make
ifeq ($(skip-makefile),)

# If building an external module we do not care about the all: rule
# but instead _all depend on modules
143
PHONY += all
L
Linus Torvalds 已提交
144 145 146 147 148 149 150 151 152 153 154 155 156
ifeq ($(KBUILD_EXTMOD),)
_all: all
else
_all: modules
endif

srctree		:= $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
TOPDIR		:= $(srctree)
# FIXME - TOPDIR is obsolete, use srctree/objtree
objtree		:= $(CURDIR)
src		:= $(srctree)
obj		:= $(objtree)

157
VPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
L
Linus Torvalds 已提交
158 159 160 161 162 163 164 165 166 167 168 169

export srctree objtree VPATH TOPDIR


# SUBARCH tells the usermode build what the underlying arch is.  That is set
# first, and if a usermode build is happening, the "ARCH=um" on the command
# line overrides the setting of ARCH below.  If a native build is happening,
# then ARCH is assigned, getting whatever value it gets normally, and 
# SUBARCH is subsequently ignored.

SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
				  -e s/arm.*/arm/ -e s/sa110/arm/ \
170
				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
P
Paul Mundt 已提交
171
				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
172
				  -e s/sh.*/sh/ )
L
Linus Torvalds 已提交
173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191

# Cross compiling and selecting different set of gcc/bin-utils
# ---------------------------------------------------------------------------
#
# When performing cross compilation for other architectures ARCH shall be set
# to the target architecture. (See arch/* for the possibilities).
# ARCH can be set during invocation of make:
# make ARCH=ia64
# Another way is to have ARCH set in the environment.
# The default ARCH is the host where make is executed.

# CROSS_COMPILE specify the prefix used for all executables used
# during compilation. Only gcc and related bin-utils executables
# are prefixed with $(CROSS_COMPILE).
# CROSS_COMPILE can be set on the command line
# make CROSS_COMPILE=ia64-linux-
# Alternatively CROSS_COMPILE can be set in the environment.
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
192
export KBUILD_BUILDHOST := $(SUBARCH)
L
Linus Torvalds 已提交
193 194 195 196
ARCH		?= $(SUBARCH)
CROSS_COMPILE	?=

# Architecture as present in compile.h
197 198
UTS_MACHINE 	:= $(ARCH)
SRCARCH 	:= $(ARCH)
L
Linus Torvalds 已提交
199

200 201 202 203 204 205 206
# Additional ARCH settings for x86
ifeq ($(ARCH),i386)
        SRCARCH := x86
endif
ifeq ($(ARCH),x86_64)
        SRCARCH := x86
endif
207

R
Roman Zippel 已提交
208 209
KCONFIG_CONFIG	?= .config

L
Linus Torvalds 已提交
210 211 212 213 214
# SHELL used by kbuild
CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
	  else if [ -x /bin/bash ]; then echo /bin/bash; \
	  else echo sh; fi ; fi)

S
Sam Ravnborg 已提交
215 216 217 218
HOSTCC       = gcc
HOSTCXX      = g++
HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
HOSTCXXFLAGS = -O2
L
Linus Torvalds 已提交
219

S
Sam Ravnborg 已提交
220 221
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
L
Linus Torvalds 已提交
222 223 224 225 226 227 228

KBUILD_MODULES :=
KBUILD_BUILTIN := 1

#	If we have only "make modules", don't compile built-in objects.
#	When we're building modules with modversions, we need to consider
#	the built-in objects during the descend as well, in order to
S
Sam Ravnborg 已提交
229
#	make sure the checksums are up to date before we record them.
L
Linus Torvalds 已提交
230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246

ifeq ($(MAKECMDGOALS),modules)
  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
endif

#	If we have "make <whatever> modules", compile modules
#	in addition to whatever we do anyway.
#	Just "make" or "make all" shall build modules as well

ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  KBUILD_MODULES := 1
endif

ifeq ($(MAKECMDGOALS),)
  KBUILD_MODULES := 1
endif

247
export KBUILD_MODULES KBUILD_BUILTIN
L
Linus Torvalds 已提交
248 249 250 251 252 253 254 255 256 257 258 259 260 261
export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD

# Beautify output
# ---------------------------------------------------------------------------
#
# Normally, we echo the whole command before executing it. By making
# that echo $($(quiet)$(cmd)), we now have the possibility to set
# $(quiet) to choose other forms of output instead, e.g.
#
#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
#
# If $(quiet) is empty, the whole command will be printed.
# If it is set to "quiet_", only the short version will be printed. 
S
Sam Ravnborg 已提交
262
# If it is set to "silent_", nothing will be printed at all, since
L
Linus Torvalds 已提交
263 264
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
A
Adrian Bunk 已提交
265
# A simple variant is to prefix commands with $(Q) - that's useful
L
Linus Torvalds 已提交
266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293
# for commands that shall be hidden in non-verbose mode.
#
#	$(Q)ln $@ :<
#
# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
# If KBUILD_VERBOSE equals 1 then the above command is displayed.

ifeq ($(KBUILD_VERBOSE),1)
  quiet =
  Q =
else
  quiet=quiet_
  Q = @
endif

# If the user is running make -s (silent mode), suppress echoing of
# commands

ifneq ($(findstring s,$(MAKEFLAGS)),)
  quiet=silent_
endif

export quiet Q KBUILD_VERBOSE


# Look for make include files relative to root of kernel src
MAKEFLAGS += --include-dir=$(srctree)

294 295
# We need some generic definitions (do not try to remake the file).
$(srctree)/scripts/Kbuild.include: ;
296
include $(srctree)/scripts/Kbuild.include
L
Linus Torvalds 已提交
297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315

# Make variables (CC, etc...)

AS		= $(CROSS_COMPILE)as
LD		= $(CROSS_COMPILE)ld
CC		= $(CROSS_COMPILE)gcc
CPP		= $(CC) -E
AR		= $(CROSS_COMPILE)ar
NM		= $(CROSS_COMPILE)nm
STRIP		= $(CROSS_COMPILE)strip
OBJCOPY		= $(CROSS_COMPILE)objcopy
OBJDUMP		= $(CROSS_COMPILE)objdump
AWK		= awk
GENKSYMS	= scripts/genksyms/genksyms
DEPMOD		= /sbin/depmod
KALLSYMS	= scripts/kallsyms
PERL		= perl
CHECK		= sparse

A
Al Viro 已提交
316
CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
L
Linus Torvalds 已提交
317 318 319
MODFLAGS	= -DMODULE
CFLAGS_MODULE   = $(MODFLAGS)
AFLAGS_MODULE   = $(MODFLAGS)
320
LDFLAGS_MODULE  =
L
Linus Torvalds 已提交
321 322 323 324 325 326 327
CFLAGS_KERNEL	=
AFLAGS_KERNEL	=


# Use LINUXINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
LINUXINCLUDE    := -Iinclude \
328
                   $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
329
		   -include include/linux/autoconf.h
L
Linus Torvalds 已提交
330

331
KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
L
Linus Torvalds 已提交
332

333
KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
334 335
		   -fno-strict-aliasing -fno-common \
		   -Werror-implicit-function-declaration
336
KBUILD_AFLAGS   := -D__ASSEMBLY__
L
Linus Torvalds 已提交
337

R
Roman Zippel 已提交
338 339
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
340
KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
341

S
Sam Ravnborg 已提交
342
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
343
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
S
Sam Ravnborg 已提交
344 345
export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
L
Linus Torvalds 已提交
346

347
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
348
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
349
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
L
Linus Torvalds 已提交
350 351 352 353 354 355 356 357

# When compiling out-of-tree modules, put MODVERDIR in the module
# tree rather than in the kernel tree. The kernel tree might
# even be read-only.
export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions

# Files to ignore in find ... statements

358 359
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
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
L
Linus Torvalds 已提交
360 361 362 363 364

# ===========================================================================
# Rules shared between *config targets and build targets

# Basic helpers built in scripts/
365
PHONY += scripts_basic
L
Linus Torvalds 已提交
366 367 368
scripts_basic:
	$(Q)$(MAKE) $(build)=scripts/basic

369 370 371
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;

372
PHONY += outputmakefile
373 374 375
# outputmakefile generates a Makefile in the output directory, if using a
# separate output directory. This allows convenient use of make in the
# output directory.
L
Linus Torvalds 已提交
376
outputmakefile:
377 378 379 380
ifneq ($(KBUILD_SRC),)
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif
L
Linus Torvalds 已提交
381 382 383 384 385

# To make sure we do not include .config for any of the *config targets
# catch them early, and hand them over to scripts/kconfig/Makefile
# It is allowed to specify more targets when calling make, including
# mixing *config targets and build targets.
S
Sam Ravnborg 已提交
386
# For example 'make oldconfig all'.
L
Linus Torvalds 已提交
387 388 389
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).

390
no-dot-config-targets := clean mrproper distclean \
391
			 cscope TAGS tags help %docs check% \
392 393
			 include/linux/version.h headers_% \
			 kernelrelease kernelversion
L
Linus Torvalds 已提交
394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430

config-targets := 0
mixed-targets  := 0
dot-config     := 1

ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
		dot-config := 0
	endif
endif

ifeq ($(KBUILD_EXTMOD),)
        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
                config-targets := 1
                ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
                        mixed-targets := 1
                endif
        endif
endif

ifeq ($(mixed-targets),1)
# ===========================================================================
# We're called with mixed targets (*config and build targets).
# Handle them one by one.

%:: FORCE
	$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@

else
ifeq ($(config-targets),1)
# ===========================================================================
# *config targets only - make sure prerequisites are updated, and descend
# in scripts/kconfig to make the *config target

# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
# KBUILD_DEFCONFIG may point out an alternative default configuration
# used for 'make defconfig'
431
include $(srctree)/arch/$(SRCARCH)/Makefile
L
Linus Torvalds 已提交
432 433
export KBUILD_DEFCONFIG

434
config %config: scripts_basic outputmakefile FORCE
R
Roman Zippel 已提交
435
	$(Q)mkdir -p include/linux include/config
L
Linus Torvalds 已提交
436 437 438 439 440 441 442 443 444 445
	$(Q)$(MAKE) $(build)=scripts/kconfig $@

else
# ===========================================================================
# Build targets only - this includes vmlinux, arch specific targets, clean
# targets and others. In general all targets except *config targets.

ifeq ($(KBUILD_EXTMOD),)
# Additional helpers built in scripts/
# Carefully list dependencies so we do not try to build scripts twice
S
Sam Ravnborg 已提交
446
# in parallel
447
PHONY += scripts
448
scripts: scripts_basic include/config/auto.conf
L
Linus Torvalds 已提交
449 450 451 452
	$(Q)$(MAKE) $(build)=$(@)

# Objects we will link into vmlinux / subdirs we need to visit
init-y		:= init/
453
drivers-y	:= drivers/ sound/ firmware/
L
Linus Torvalds 已提交
454 455 456 457 458 459
net-y		:= net/
libs-y		:= lib/
core-y		:= usr/
endif # KBUILD_EXTMOD

ifeq ($(dot-config),1)
460 461
# Read in config
-include include/config/auto.conf
L
Linus Torvalds 已提交
462

463
ifeq ($(KBUILD_EXTMOD),)
L
Linus Torvalds 已提交
464 465
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
R
Roman Zippel 已提交
466
-include include/config/auto.conf.cmd
L
Linus Torvalds 已提交
467 468

# To avoid any implicit rule to kick in, define an empty command
R
Roman Zippel 已提交
469
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
L
Linus Torvalds 已提交
470

R
Roman Zippel 已提交
471
# If .config is newer than include/config/auto.conf, someone tinkered
472
# with it and forgot to run make oldconfig.
S
Sam Ravnborg 已提交
473
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
474
# we execute the config step to be sure to catch updated Kconfig files
R
Roman Zippel 已提交
475
include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
L
Linus Torvalds 已提交
476
	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
477
else
478 479 480 481 482 483 484 485 486 487 488 489 490 491
# external modules needs include/linux/autoconf.h and include/config/auto.conf
# but do not care if they are up-to-date. Use auto.conf to trigger the test
PHONY += include/config/auto.conf

include/config/auto.conf:
	$(Q)test -e include/linux/autoconf.h -a -e $@ || (		\
	echo;								\
	echo "  ERROR: Kernel configuration is invalid.";		\
	echo "         include/linux/autoconf.h or $@ are missing.";	\
	echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
	echo;								\
	/bin/false)

endif # KBUILD_EXTMOD
R
Roman Zippel 已提交
492

L
Linus Torvalds 已提交
493 494
else
# Dummy target needed, because used as prerequisite
R
Roman Zippel 已提交
495
include/config/auto.conf: ;
496
endif # $(dot-config)
L
Linus Torvalds 已提交
497 498 499 500

# The all: target is the default when no target is given on the
# command line.
# This allow a user to issue only 'make' to build a kernel including modules
S
Sam Ravnborg 已提交
501
# Defaults vmlinux but it is usually overridden in the arch makefile
L
Linus Torvalds 已提交
502 503 504
all: vmlinux

ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
505
KBUILD_CFLAGS	+= -Os
L
Linus Torvalds 已提交
506
else
507
KBUILD_CFLAGS	+= -O2
L
Linus Torvalds 已提交
508 509
endif

R
Ralf Baechle 已提交
510 511
include $(srctree)/arch/$(SRCARCH)/Makefile

512 513 514 515
ifneq (CONFIG_FRAME_WARN,0)
KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
endif

516 517 518 519
# Force gcc to behave correct even for buggy distributions
# Arch Makefiles may override this setting
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)

L
Linus Torvalds 已提交
520
ifdef CONFIG_FRAME_POINTER
521
KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
L
Linus Torvalds 已提交
522
else
523
KBUILD_CFLAGS	+= -fomit-frame-pointer
L
Linus Torvalds 已提交
524 525 526
endif

ifdef CONFIG_DEBUG_INFO
527
KBUILD_CFLAGS	+= -g
528
KBUILD_AFLAGS	+= -gdwarf-2
L
Linus Torvalds 已提交
529 530
endif

531 532 533 534
ifdef CONFIG_FTRACE
KBUILD_CFLAGS	+= -pg
endif

535 536 537 538 539
# We trigger additional mismatches with less inlining
ifdef CONFIG_DEBUG_SECTION_MISMATCH
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
endif

540
# arch Makefile may override CC so keep this after arch Makefile is included
541
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
542 543
CHECKFLAGS     += $(NOSTDINC_FLAGS)

L
Linus Torvalds 已提交
544
# warn about C99 declaration after statement
545
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
L
Linus Torvalds 已提交
546

S
Sam Ravnborg 已提交
547
# disable pointer signed / unsigned warnings in gcc 4.0
548
KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
L
Linus Torvalds 已提交
549

550
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566
# But warn user when we do so
warn-assign = \
$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")

ifneq ($(KCPPFLAGS),)
        $(call warn-assign,CPPFLAGS)
        KBUILD_CPPFLAGS += $(KCPPFLAGS)
endif
ifneq ($(KAFLAGS),)
        $(call warn-assign,AFLAGS)
        KBUILD_AFLAGS += $(KAFLAGS)
endif
ifneq ($(KCFLAGS),)
        $(call warn-assign,CFLAGS)
        KBUILD_CFLAGS += $(KCFLAGS)
endif
567

R
Roland McGrath 已提交
568 569 570 571 572 573
# Use --build-id when available.
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
			      $(call ld-option, -Wl$(comma)--build-id,))
LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)

L
Linus Torvalds 已提交
574
# Default kernel image to build when no specific target is given.
S
Sam Ravnborg 已提交
575
# KBUILD_IMAGE may be overruled on the command line or
L
Linus Torvalds 已提交
576 577 578 579 580 581 582 583 584 585 586 587 588
# set in the environment
# Also any assignments in arch/$(ARCH)/Makefile take precedence over
# this default value
export KBUILD_IMAGE ?= vmlinux

#
# INSTALL_PATH specifies where to place the updated kernel and system map
# images. Default is /boot, but you can set it to other values
export	INSTALL_PATH ?= /boot

#
# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
# relocations required by build roots.  This is not defined in the
S
Sam Ravnborg 已提交
589
# makefile but the argument can be passed to make if needed.
L
Linus Torvalds 已提交
590 591
#

592
MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
L
Linus Torvalds 已提交
593 594
export MODLIB

595 596 597 598 599 600 601 602
#
#  INSTALL_MOD_STRIP, if defined, will cause modules to be
#  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
#  the default option --strip-debug will be used.  Otherwise,
#  INSTALL_MOD_STRIP will used as the options to the strip command.

ifdef INSTALL_MOD_STRIP
ifeq ($(INSTALL_MOD_STRIP),1)
A
Andreas Schwab 已提交
603
mod_strip_cmd = $(STRIP) --strip-debug
604 605 606 607 608 609 610 611
else
mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
endif # INSTALL_MOD_STRIP=1
else
mod_strip_cmd = true
endif # INSTALL_MOD_STRIP
export mod_strip_cmd

L
Linus Torvalds 已提交
612 613

ifeq ($(KBUILD_EXTMOD),)
614
core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
L
Linus Torvalds 已提交
615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634

vmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
		     $(net-y) $(net-m) $(libs-y) $(libs-m)))

vmlinux-alldirs	:= $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
		     $(init-n) $(init-) \
		     $(core-n) $(core-) $(drivers-n) $(drivers-) \
		     $(net-n)  $(net-)  $(libs-n)    $(libs-))))

init-y		:= $(patsubst %/, %/built-in.o, $(init-y))
core-y		:= $(patsubst %/, %/built-in.o, $(core-y))
drivers-y	:= $(patsubst %/, %/built-in.o, $(drivers-y))
net-y		:= $(patsubst %/, %/built-in.o, $(net-y))
libs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
libs-y2		:= $(patsubst %/, %/built-in.o, $(libs-y))
libs-y		:= $(libs-y1) $(libs-y2)

# Build vmlinux
# ---------------------------------------------------------------------------
S
Sam Ravnborg 已提交
635
# vmlinux is built from the objects selected by $(vmlinux-init) and
L
Linus Torvalds 已提交
636
# $(vmlinux-main). Most are built-in.o files from top-level directories
637
# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
L
Linus Torvalds 已提交
638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662
# Ordering when linking is important, and $(vmlinux-init) must be first.
#
# vmlinux
#   ^
#   |
#   +-< $(vmlinux-init)
#   |   +--< init/version.o + more
#   |
#   +--< $(vmlinux-main)
#   |    +--< driver/built-in.o mm/built-in.o + more
#   |
#   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
#
# vmlinux version (uname -v) cannot be updated during normal
# descending-into-subdirs phase since we do not yet know if we need to
# update vmlinux.
# Therefore this step is delayed until just before final link of vmlinux -
# except in the kallsyms case where it is done just before adding the
# symbols to the kernel.
#
# System.map is generated to document addresses of all kernel symbols

vmlinux-init := $(head-y) $(init-y)
vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
663
vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
664
export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
L
Linus Torvalds 已提交
665 666 667 668 669 670 671

# Rule to link vmlinux - also used during CONFIG_KALLSYMS
# May be overridden by arch/$(ARCH)/Makefile
quiet_cmd_vmlinux__ ?= LD      $@
      cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
      -T $(vmlinux-lds) $(vmlinux-init)                          \
      --start-group $(vmlinux-main) --end-group                  \
672
      $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
L
Linus Torvalds 已提交
673 674 675 676

# Generate new vmlinux version
quiet_cmd_vmlinux_version = GEN     .version
      cmd_vmlinux_version = set -e;                     \
677 678 679 680 681 682 683
	if [ ! -r .version ]; then			\
	  rm -f .version;				\
	  echo 1 >.version;				\
	else						\
	  mv .version .old_version;			\
	  expr 0$$(cat .old_version) + 1 >.version;	\
	fi;						\
L
Linus Torvalds 已提交
684 685 686
	$(MAKE) $(build)=init

# Generate System.map
S
Sam Ravnborg 已提交
687
quiet_cmd_sysmap = SYSMAP
L
Linus Torvalds 已提交
688 689 690 691 692
      cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap

# Link of vmlinux
# If CONFIG_KALLSYMS is set .version is already updated
# Generate System.map and verify that the content is consistent
693 694
# Use + in front of the vmlinux_version rule to silent warning with make -j2
# First command is ':' to allow us to use + in front of the rule
L
Linus Torvalds 已提交
695
define rule_vmlinux__
696
	:
L
Linus Torvalds 已提交
697 698 699 700 701
	$(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))

	$(call cmd,vmlinux__)
	$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd

702 703 704 705 706 707
	$(Q)$(if $($(quiet)cmd_sysmap),                                      \
	  echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
	$(cmd_sysmap) $@ System.map;                                         \
	if [ $$? -ne 0 ]; then                                               \
		rm -f $@;                                                    \
		/bin/false;                                                  \
L
Linus Torvalds 已提交
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739
	fi;
	$(verify_kallsyms)
endef


ifdef CONFIG_KALLSYMS
# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
# It's a three stage process:
# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
#   empty
#   Running kallsyms on that gives us .tmp_kallsyms1.o with
#   the right size - vmlinux version (uname -v) is updated during this step
# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
#   but due to the added section, some addresses have shifted.
#   From here, we generate a correct .tmp_kallsyms2.o
# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
# o Verify that the System.map from vmlinux matches the map from
#   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
#   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
#   temporary bypass to allow the kernel to be built while the
#   maintainers work out what went wrong with kallsyms.

ifdef CONFIG_KALLSYMS_EXTRA_PASS
last_kallsyms := 3
else
last_kallsyms := 2
endif

kallsyms.o := .tmp_kallsyms$(last_kallsyms).o

define verify_kallsyms
740 741
	$(Q)$(if $($(quiet)cmd_sysmap),                                      \
	  echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
L
Linus Torvalds 已提交
742
	  $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
743 744 745
	$(Q)cmp -s System.map .tmp_System.map ||                             \
		(echo Inconsistent kallsyms data;                            \
		 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
L
Linus Torvalds 已提交
746 747 748 749 750
		 rm .tmp_kallsyms* ; /bin/false )
endef

# Update vmlinux version before link
# Use + in front of this rule to silent warning about make -j1
S
Sam Ravnborg 已提交
751
# First command is ':' to allow us to use + in front of this rule
L
Linus Torvalds 已提交
752 753
cmd_ksym_ld = $(cmd_vmlinux__)
define rule_ksym_ld
S
Sam Ravnborg 已提交
754
	: 
L
Linus Torvalds 已提交
755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783
	+$(call cmd,vmlinux_version)
	$(call cmd,vmlinux__)
	$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
endef

# Generate .S file with all kernel symbols
quiet_cmd_kallsyms = KSYM    $@
      cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
                     $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@

.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
	$(call if_changed_dep,as_o_S)

.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
	$(call cmd,kallsyms)

# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
	$(call if_changed_rule,ksym_ld)

.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
	$(call if_changed,vmlinux__)

.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
	$(call if_changed,vmlinux__)

# Needs to visit scripts/ before $(KALLSYMS) can be used.
$(KALLSYMS): scripts ;

S
Sam Ravnborg 已提交
784 785 786 787 788 789 790 791 792 793
# Generate some data for debugging strange kallsyms problems
debug_kallsyms: .tmp_map$(last_kallsyms)

.tmp_map%: .tmp_vmlinux% FORCE
	($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@

.tmp_map3: .tmp_map2

.tmp_map2: .tmp_map1

L
Linus Torvalds 已提交
794 795
endif # ifdef CONFIG_KALLSYMS

796 797 798 799 800
# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
# relevant sections renamed as per the linker script.
quiet_cmd_vmlinux-modpost = LD      $@
      cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
	 $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
S
Sam Ravnborg 已提交
801
	 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
802 803 804 805 806 807 808
define rule_vmlinux-modpost
	:
	+$(call cmd,vmlinux-modpost)
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
	$(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
endef

L
Linus Torvalds 已提交
809
# vmlinux image - including updated kernel symbols
810
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
811
ifdef CONFIG_HEADERS_CHECK
812
	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
M
Mathieu Desnoyers 已提交
813 814 815
endif
ifdef CONFIG_SAMPLES
	$(Q)$(MAKE) $(build)=samples
816
endif
817
	$(call vmlinux-modpost)
L
Linus Torvalds 已提交
818
	$(call if_changed_rule,vmlinux__)
819
	$(Q)rm -f .old_version
L
Linus Torvalds 已提交
820

821
# build vmlinux.o first to catch section mismatch errors early
S
Sam Ravnborg 已提交
822 823 824
ifdef CONFIG_KALLSYMS
.tmp_vmlinux1: vmlinux.o
endif
S
Sam Ravnborg 已提交
825 826 827

modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
828 829
	$(call if_changed_rule,vmlinux-modpost)

L
Linus Torvalds 已提交
830 831 832 833 834 835 836 837 838 839
# The actual objects are generated when descending, 
# make sure no implicit rule kicks in
$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;

# Handle descending into subdirectories listed in $(vmlinux-dirs)
# Preset locale variables to speed up the build process. Limit locale
# tweaks to this spot to avoid wrong language settings when running
# make menuconfig etc.
# Error messages still appears in the original language

840
PHONY += $(vmlinux-dirs)
841
$(vmlinux-dirs): prepare scripts
L
Linus Torvalds 已提交
842 843
	$(Q)$(MAKE) $(build)=$@

844 845
# Build the kernel release string
#
846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862
# The KERNELRELEASE value built here is stored in the file
# include/config/kernel.release, and is used when executing several
# make targets, such as "make install" or "make modules_install."
#
# The eventual kernel release string consists of the following fields,
# shown in a hierarchical format to show how smaller parts are concatenated
# to form the larger and final value, with values coming from places like
# the Makefile, kernel config options, make command line options and/or
# SCM tag information.
#
#	$(KERNELVERSION)
#	  $(VERSION)			eg, 2
#	  $(PATCHLEVEL)			eg, 6
#	  $(SUBLEVEL)			eg, 18
#	  $(EXTRAVERSION)		eg, -rc6
#	$(localver-full)
#	  $(localver)
863
#	    localversion*		(files without backups, containing '~')
864 865 866 867 868 869 870 871 872
#	    $(CONFIG_LOCALVERSION)	(from kernel config setting)
#	  $(localver-auto)		(only if CONFIG_LOCALVERSION_AUTO is set)
#	    ./scripts/setlocalversion	(SCM tag, if one exists)
#	    $(LOCALVERSION)		(from make command line if provided)
#
#  Note how the final $(localver-auto) string is included *only* if the
# kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
# moment, only git is supported but other SCMs can edit the script
# scripts/setlocalversion and add the appropriate checks as needed.
873

874 875
pattern = ".*/localversion[^~]*"
string  = $(shell cat /dev/null \
876
	   `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
877

878 879
localver = $(subst $(space),, $(string) \
			      $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
S
Sam Ravnborg 已提交
880

881 882
# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
# and if the SCM is know a tag from the SCM is appended.
S
Sam Ravnborg 已提交
883
# The appended tag is determined by the SCM used.
884 885 886 887 888 889 890 891 892 893 894 895
#
# Currently, only git is supported.
# Other SCMs can edit scripts/setlocalversion and add the appropriate
# checks as needed.
ifdef CONFIG_LOCALVERSION_AUTO
	_localver-auto = $(shell $(CONFIG_SHELL) \
	                  $(srctree)/scripts/setlocalversion $(srctree))
	localver-auto  = $(LOCALVERSION)$(_localver-auto)
endif

localver-full = $(localver)$(localver-auto)

R
Roman Zippel 已提交
896
# Store (new) KERNELRELASE string in include/config/kernel.release
897
kernelrelease = $(KERNELVERSION)$(localver-full)
R
Roman Zippel 已提交
898
include/config/kernel.release: include/config/auto.conf FORCE
899 900
	$(Q)rm -f $@
	$(Q)echo $(kernelrelease) > $@
901 902


L
Linus Torvalds 已提交
903
# Things we need to do before we recursively start building the kernel
904 905 906 907
# or the modules are listed in "prepare".
# A multi level approach is used. prepareN is processed before prepareN-1.
# archprepare is used in arch Makefiles and when processed asm symlink,
# version.h and scripts_basic is processed / created.
L
Linus Torvalds 已提交
908

909
# Listed in dependency order
910
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
911

912
# prepare3 is used to check if we are building in a separate output directory,
L
Linus Torvalds 已提交
913 914 915
# and if so do:
# 1) Check that make has not been executed in the kernel src $(srctree)
# 2) Create the include2 directory, used for the second asm symlink
R
Roman Zippel 已提交
916
prepare3: include/config/kernel.release
L
Linus Torvalds 已提交
917 918
ifneq ($(KBUILD_SRC),)
	@echo '  Using $(srctree) as source for kernel'
R
Roman Zippel 已提交
919
	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
L
Linus Torvalds 已提交
920 921 922 923 924
		echo "  $(srctree) is not clean, please run 'make mrproper'";\
		echo "  in the '$(srctree)' directory.";\
		/bin/false; \
	fi;
	$(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
925
	$(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
L
Linus Torvalds 已提交
926 927
endif

928 929
# prepare2 creates a makefile if using a separate output directory
prepare2: prepare3 outputmakefile
L
Linus Torvalds 已提交
930

931 932
prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
                   include/asm include/config/auto.conf
S
Sam Ravnborg 已提交
933
	$(cmd_crmodverdir)
L
Linus Torvalds 已提交
934

935 936 937
archprepare: prepare1 scripts_basic

prepare0: archprepare FORCE
938
	$(Q)$(MAKE) $(build)=.
939
	$(Q)$(MAKE) $(build)=. missing-syscalls
940

L
Linus Torvalds 已提交
941
# All the preparing..
942
prepare: prepare0
L
Linus Torvalds 已提交
943

S
Sam Ravnborg 已提交
944 945
# Leave this as default for preprocessing vmlinux.lds.S, which is now
# done in arch/$(ARCH)/kernel/Makefile
L
Linus Torvalds 已提交
946 947 948

export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)

949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966
# The asm symlink changes when $(ARCH) changes.
# Detect this and ask user to run make mrproper

include/asm: FORCE
	$(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`;   \
	if [ -L include/asm ]; then                                     \
		if [ "$$asmlink" != "$(SRCARCH)" ]; then                \
			echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
			echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
			exit 1;                                         \
		fi;                                                     \
	else                                                            \
		echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';          \
		if [ ! -d include ]; then                               \
			mkdir -p include;                               \
		fi;                                                     \
		ln -fsn asm-$(SRCARCH) $@;                              \
	fi
L
Linus Torvalds 已提交
967 968 969 970 971 972 973 974

# Generate some files
# ---------------------------------------------------------------------------

# KERNELRELEASE can change from a few different places, meaning version.h
# needs to be updated, so this check is forced on all builds

uts_len := 64
S
Sam Ravnborg 已提交
975 976 977 978 979 980 981
define filechk_utsrelease.h
	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
	  exit 1;                                                         \
	fi;                                                               \
	(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
endef
L
Linus Torvalds 已提交
982 983

define filechk_version.h
S
Sam Ravnborg 已提交
984 985 986
	(echo \#define LINUX_VERSION_CODE $(shell                             \
	expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
L
Linus Torvalds 已提交
987 988
endef

S
Sam Ravnborg 已提交
989
include/linux/version.h: $(srctree)/Makefile FORCE
L
Linus Torvalds 已提交
990 991
	$(call filechk,version.h)

S
Sam Ravnborg 已提交
992 993 994
include/linux/utsrelease.h: include/config/kernel.release FORCE
	$(call filechk,utsrelease.h)

L
Linus Torvalds 已提交
995 996
# ---------------------------------------------------------------------------

997
PHONY += depend dep
L
Linus Torvalds 已提交
998 999 1000
depend dep:
	@echo '*** Warning: make $@ is unnecessary now.'

1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
# ---------------------------------------------------------------------------
# Firmware install
INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
export INSTALL_FW_PATH

PHONY += firmware_install
firmware_install: FORCE
	@mkdir -p $(objtree)/firmware
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install

1011 1012 1013
# ---------------------------------------------------------------------------
# Kernel headers

1014 1015
#Default location for installed headers
export INSTALL_HDR_PATH = $(objtree)/usr
1016

1017 1018 1019 1020 1021 1022 1023 1024
hdr-filter := generic um ppc
hdr-archs  := $(filter-out $(hdr-filter),                           \
                  $(patsubst $(srctree)/include/asm-%/Kbuild,%,     \
                      $(wildcard $(srctree)/include/asm-*/Kbuild)))
hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj

PHONY += __headers
__headers: include/linux/version.h scripts_basic FORCE
1025
	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1026 1027 1028

PHONY += headers_install_all
headers_install_all: __headers
1029 1030 1031
	$(Q)set -e; for arch in $(hdr-archs); do \
	 $(MAKE) ARCH=$$arch SRCARCH=$$arch $(hdr-inst)=include \
	         BIASMDIR=-bi-$$arch ;\
1032 1033
	 done

1034
PHONY += headers_install
1035 1036
headers_install: __headers
	$(Q)if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1037
	  echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
1038 1039 1040
	  exit 1 ; \
	fi
	$(Q)$(MAKE) $(hdr-inst)=include ARCH=$(SRCARCH)
1041

1042 1043
PHONY += headers_check_all
headers_check_all: headers_install_all
1044 1045 1046
	$(Q)set -e; for arch in $(hdr-archs); do \
	 $(MAKE) ARCH=$$arch SRCARCH=$$arch $(hdr-inst)=include \
	         BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1047 1048
	 done

1049 1050
PHONY += headers_check
headers_check: headers_install
1051
	$(Q)$(MAKE) $(hdr-inst)=include ARCH=$(SRCARCH) HDRCHECK=1
1052

L
Linus Torvalds 已提交
1053 1054 1055 1056 1057
# ---------------------------------------------------------------------------
# Modules

ifdef CONFIG_MODULES

S
Sam Ravnborg 已提交
1058
# By default, build modules as well
L
Linus Torvalds 已提交
1059 1060 1061 1062

all: modules

#	Build modules
T
Tejun Heo 已提交
1063 1064 1065 1066
#
#	A module can be listed more than once in obj-m resulting in
#	duplicate lines in modules.order files.  Those are removed
#	using awk while concatenating to the final file.
L
Linus Torvalds 已提交
1067

1068
PHONY += modules
L
Linus Torvalds 已提交
1069
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
T
Tejun Heo 已提交
1070
	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
L
Linus Torvalds 已提交
1071
	@echo '  Building modules, stage 2.';
S
Sam Ravnborg 已提交
1072
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
L
Linus Torvalds 已提交
1073 1074 1075


# Target to prepare building external modules
1076
PHONY += modules_prepare
1077
modules_prepare: prepare scripts
L
Linus Torvalds 已提交
1078 1079

# Target to install modules
1080
PHONY += modules_install
L
Linus Torvalds 已提交
1081 1082
modules_install: _modinst_ _modinst_post

1083
PHONY += _modinst_
L
Linus Torvalds 已提交
1084
_modinst_:
1085
	@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
L
Linus Torvalds 已提交
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097
		echo "Warning: you may need to install module-init-tools"; \
		echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
		sleep 1; \
	fi
	@rm -rf $(MODLIB)/kernel
	@rm -f $(MODLIB)/source
	@mkdir -p $(MODLIB)/kernel
	@ln -s $(srctree) $(MODLIB)/source
	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
		rm -f $(MODLIB)/build ; \
		ln -s $(objtree) $(MODLIB)/build ; \
	fi
T
Tejun Heo 已提交
1098
	@cp -f $(objtree)/modules.order $(MODLIB)/
S
Sam Ravnborg 已提交
1099
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
L
Linus Torvalds 已提交
1100

1101
# This depmod is only for convenience to give the initial
L
Linus Torvalds 已提交
1102 1103
# boot a modules.dep even before / is mounted read-write.  However the
# boot script depmod is the master version.
1104
PHONY += _modinst_post
L
Linus Torvalds 已提交
1105
_modinst_post: _modinst_
1106
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1107
	$(call cmd,depmod)
L
Linus Torvalds 已提交
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136

else # CONFIG_MODULES

# Modules not configured
# ---------------------------------------------------------------------------

modules modules_install: FORCE
	@echo
	@echo "The present kernel configuration has modules disabled."
	@echo "Type 'make config' and enable loadable module support."
	@echo "Then build a kernel with module support enabled."
	@echo
	@exit 1

endif # CONFIG_MODULES

###
# Cleaning is done on three levels.
# make clean     Delete most generated files
#                Leave enough to build external modules
# make mrproper  Delete the current configuration, and all generated files
# make distclean Remove editor backup files, patch leftover files and the like

# Directories & files removed with 'make clean'
CLEAN_DIRS  += $(MODVERDIR)
CLEAN_FILES +=	vmlinux System.map \
                .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map

# Directories & files removed with 'make mrproper'
1137
MRPROPER_DIRS  += include/config include2 usr/include
1138
MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1139 1140
                  include/linux/autoconf.h include/linux/version.h      \
                  include/linux/utsrelease.h                            \
1141
                  include/linux/bounds.h include/asm*/asm-offsets.h     \
R
Roman Zippel 已提交
1142
		  Module.symvers tags TAGS cscope*
L
Linus Torvalds 已提交
1143 1144 1145 1146 1147

# clean - Delete most, but leave enough to build external modules
#
clean: rm-dirs  := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
1148
clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
L
Linus Torvalds 已提交
1149

1150
PHONY += $(clean-dirs) clean archclean
L
Linus Torvalds 已提交
1151 1152 1153 1154 1155 1156 1157
$(clean-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)

clean: archclean $(clean-dirs)
	$(call cmd,rmdirs)
	$(call cmd,rmfiles)
	@find . $(RCS_FIND_IGNORE) \
S
Sam Ravnborg 已提交
1158
		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1159
		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1160 1161
		-o -name '*.symtypes' -o -name 'modules.order' \
		-o -name 'Module.markers' \) \
L
Linus Torvalds 已提交
1162 1163 1164 1165 1166 1167 1168 1169
		-type f -print | xargs rm -f

# mrproper - Delete all generated files, including .config
#
mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)

1170
PHONY += $(mrproper-dirs) mrproper archmrproper
L
Linus Torvalds 已提交
1171 1172 1173 1174 1175 1176 1177 1178 1179
$(mrproper-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)

mrproper: clean archmrproper $(mrproper-dirs)
	$(call cmd,rmdirs)
	$(call cmd,rmfiles)

# distclean
#
1180
PHONY += distclean
L
Linus Torvalds 已提交
1181 1182 1183

distclean: mrproper
	@find $(srctree) $(RCS_FIND_IGNORE) \
S
Sam Ravnborg 已提交
1184
		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
L
Linus Torvalds 已提交
1185
		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
S
Sam Ravnborg 已提交
1186
		-o -name '.*.rej' -o -size 0 \
L
Linus Torvalds 已提交
1187 1188 1189 1190 1191 1192 1193 1194 1195
		-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
		-type f -print | xargs rm -f


# Packaging of the kernel to various formats
# ---------------------------------------------------------------------------
# rpm target kept for backward compatibility
package-dir	:= $(srctree)/scripts/package

1196
%pkg: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
1197
	$(Q)$(MAKE) $(build)=$(package-dir) $@
1198
rpm: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
1199
	$(Q)$(MAKE) $(build)=$(package-dir) $@
L
Linus Torvalds 已提交
1200 1201 1202 1203 1204


# Brief documentation of the typical targets used
# ---------------------------------------------------------------------------

1205
boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
L
Linus Torvalds 已提交
1206
boards := $(notdir $(boards))
1207 1208
board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
board-dirs := $(sort $(notdir $(board-dirs:/=)))
L
Linus Torvalds 已提交
1209 1210 1211

help:
	@echo  'Cleaning targets:'
1212
	@echo  '  clean		  - Remove most generated files but keep the config and'
1213
	@echo  '                    enough build support to build external modules'
1214
	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1215
	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
L
Linus Torvalds 已提交
1216 1217 1218 1219 1220 1221 1222 1223
	@echo  ''
	@echo  'Configuration targets:'
	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
	@echo  ''
	@echo  'Other generic targets:'
	@echo  '  all		  - Build all targets marked with [*]'
	@echo  '* vmlinux	  - Build the bare kernel'
	@echo  '* modules	  - Build all modules'
1224
	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1225 1226
	@echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
	@echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
L
Linus Torvalds 已提交
1227 1228
	@echo  '  dir/            - Build all files in dir and below'
	@echo  '  dir/file.[ois]  - Build specified target only'
1229
	@echo  '  dir/file.ko     - Build module including final link'
1230
	@echo  '  prepare         - Set up for building external modules'
L
Linus Torvalds 已提交
1231 1232
	@echo  '  tags/TAGS	  - Generate tags file for editors'
	@echo  '  cscope	  - Generate cscope index'
1233
	@echo  '  kernelrelease	  - Output the release version string'
1234
	@echo  '  kernelversion	  - Output the version stored in Makefile'
1235
	@if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1236
	 echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1237
	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1238
	 fi
L
Linus Torvalds 已提交
1239 1240 1241 1242
	@echo  ''
	@echo  'Static analysers'
	@echo  '  checkstack      - Generate a list of stack hogs'
	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1243
	@echo  '  versioncheck    - Sanity check on version.h usage'
1244
	@echo  '  includecheck    - Check for duplicate included header files'
1245
	@echo  '  export_report   - List the usages of all exported symbols'
1246
	@if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1247 1248
	 echo  '  headers_check   - Sanity check on exported headers'; \
	 fi
L
Linus Torvalds 已提交
1249 1250
	@echo  ''
	@echo  'Kernel packaging:'
S
Sam Ravnborg 已提交
1251
	@$(MAKE) $(build)=$(package-dir) help
L
Linus Torvalds 已提交
1252 1253 1254 1255
	@echo  ''
	@echo  'Documentation targets:'
	@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
	@echo  ''
1256
	@echo  'Architecture specific targets ($(SRCARCH)):'
L
Linus Torvalds 已提交
1257
	@$(if $(archhelp),$(archhelp),\
1258
		echo '  No architecture specific help defined for $(SRCARCH)')
L
Linus Torvalds 已提交
1259 1260 1261 1262 1263
	@echo  ''
	@$(if $(boards), \
		$(foreach b, $(boards), \
		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
		echo '')
1264 1265 1266 1267 1268
	@$(if $(board-dirs), \
		$(foreach b, $(board-dirs), \
		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
		printf "  %-16s - Show all of the above\\n" help-boards; \
		echo '')
L
Linus Torvalds 已提交
1269 1270

	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1271
	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
L
Linus Torvalds 已提交
1272
	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1273 1274
	@echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
L
Linus Torvalds 已提交
1275 1276 1277 1278 1279
	@echo  ''
	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
	@echo  'For further info see the ./README file'


1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293
help-board-dirs := $(addprefix help-,$(board-dirs))

help-boards: $(help-board-dirs)

boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))

$(help-board-dirs): help-%:
	@echo  'Architecture specific targets ($(SRCARCH) $*):'
	@$(if $(boards-per-dir), \
		$(foreach b, $(boards-per-dir), \
		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
		echo '')


L
Linus Torvalds 已提交
1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314
# Documentation targets
# ---------------------------------------------------------------------------
%docs: scripts_basic FORCE
	$(Q)$(MAKE) $(build)=Documentation/DocBook $@

else # KBUILD_EXTMOD

###
# External module support.
# When building external modules the kernel used as basis is considered
# read-only, and no consistency checks are made and the make
# system is not used on the basis kernel. If updates are required
# in the basis kernel ordinary make commands (without M=...) must
# be used.
#
# The following are the only valid targets when building external
# modules.
# make M=dir clean     Delete all automatically generated files
# make M=dir modules   Make all modules in specified dir
# make M=dir	       Same as 'make M=dir modules'
# make M=dir modules_install
S
Sam Ravnborg 已提交
1315
#                      Install the modules built in the module directory
L
Linus Torvalds 已提交
1316 1317 1318 1319
#                      Assumes install directory is already created

# We are always building modules
KBUILD_MODULES := 1
1320
PHONY += crmodverdir
L
Linus Torvalds 已提交
1321
crmodverdir:
S
Sam Ravnborg 已提交
1322
	$(cmd_crmodverdir)
L
Linus Torvalds 已提交
1323

1324
PHONY += $(objtree)/Module.symvers
L
Linus Torvalds 已提交
1325 1326 1327 1328 1329 1330 1331 1332
$(objtree)/Module.symvers:
	@test -e $(objtree)/Module.symvers || ( \
	echo; \
	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
	echo "           is missing; modules will have no dependencies and modversions."; \
	echo )

module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1333
PHONY += $(module-dirs) modules
L
Linus Torvalds 已提交
1334 1335 1336 1337 1338
$(module-dirs): crmodverdir $(objtree)/Module.symvers
	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)

modules: $(module-dirs)
	@echo '  Building modules, stage 2.';
S
Sam Ravnborg 已提交
1339
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
L
Linus Torvalds 已提交
1340

1341
PHONY += modules_install
1342
modules_install: _emodinst_ _emodinst_post
1343

1344 1345
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
PHONY += _emodinst_
1346 1347
_emodinst_:
	$(Q)mkdir -p $(MODLIB)/$(install-dir)
S
Sam Ravnborg 已提交
1348
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
L
Linus Torvalds 已提交
1349

1350
PHONY += _emodinst_post
1351 1352 1353
_emodinst_post: _emodinst_
	$(call cmd,depmod)

L
Linus Torvalds 已提交
1354 1355
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))

1356
PHONY += $(clean-dirs) clean
L
Linus Torvalds 已提交
1357 1358 1359 1360
$(clean-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)

clean:	rm-dirs := $(MODVERDIR)
1361
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
L
Linus Torvalds 已提交
1362 1363
clean: $(clean-dirs)
	$(call cmd,rmdirs)
1364
	$(call cmd,rmfiles)
L
Linus Torvalds 已提交
1365
	@find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
S
Sam Ravnborg 已提交
1366
		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
L
Linus Torvalds 已提交
1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377
		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
		-type f -print | xargs rm -f

help:
	@echo  '  Building external modules.'
	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
	@echo  ''
	@echo  '  modules         - default target, build the module(s)'
	@echo  '  modules_install - install the module'
	@echo  '  clean           - remove generated files in module directory only'
	@echo  ''
1378 1379

# Dummies...
1380
PHONY += prepare scripts
1381 1382
prepare: ;
scripts: ;
L
Linus Torvalds 已提交
1383 1384 1385 1386 1387 1388 1389 1390 1391
endif # KBUILD_EXTMOD

# Generate tags for editors
# ---------------------------------------------------------------------------

#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
#Adding $(srctree) adds about 20M on i386 to the size of the output file!

1392
ifeq ($(src),$(obj))
L
Linus Torvalds 已提交
1393 1394 1395 1396 1397
__srctree =
else
__srctree = $(srctree)/
endif

1398 1399 1400 1401
ifeq ($(ALLSOURCE_ARCHS),)
ifeq ($(ARCH),um)
ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
else
1402
ALLINCLUDE_ARCHS := $(SRCARCH)
1403 1404
endif
else
1405
#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1406 1407 1408
ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
endif

1409
ALLSOURCE_ARCHS := $(SRCARCH)
1410

1411
define find-sources
1412 1413
        ( for arch in $(ALLSOURCE_ARCHS) ; do \
	       find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1414
	            -name $1 -print; \
1415
	  done ; \
L
Linus Torvalds 已提交
1416
	  find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1417
	       -name $1 -print; \
L
Linus Torvalds 已提交
1418 1419
	  find $(__srctree)include $(RCS_FIND_IGNORE) \
	       \( -name config -o -name 'asm-*' \) -prune \
1420
	       -o -name $1 -print; \
1421 1422
	  for arch in $(ALLINCLUDE_ARCHS) ; do \
	       find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1423
	            -name $1 -print; \
1424
	  done ; \
L
Linus Torvalds 已提交
1425
	  find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1426 1427
	       -name $1 -print; \
	  find $(__srctree) $(RCS_FIND_IGNORE) \
1428
	       \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1429 1430
	       -name $1 -print; \
	  )
1431 1432 1433 1434 1435 1436 1437 1438 1439 1440
endef

define all-sources
	$(call find-sources,'*.[chS]')
endef
define all-kconfigs
	$(call find-sources,'Kconfig*')
endef
define all-defconfigs
	$(call find-sources,'defconfig')
L
Linus Torvalds 已提交
1441 1442
endef

1443 1444 1445 1446
define xtags
	if $1 --version 2>&1 | grep -iq exuberant; then \
	    $(all-sources) | xargs $1 -a \
		-I __initdata,__exitdata,__acquires,__releases \
1447
		-I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
1448
		-I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1449
		--extra=+f --c-kinds=+px \
1450
		--regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1451 1452 1453
	    $(all-kconfigs) | xargs $1 -a \
		--langdef=kconfig \
		--language-force=kconfig \
1454
		--regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
1455
	    $(all-defconfigs) | xargs -r $1 -a \
1456 1457 1458 1459 1460 1461
		--langdef=dotconfig \
		--language-force=dotconfig \
		--regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
	elif $1 --version 2>&1 | grep -iq emacs; then \
	    $(all-sources) | xargs $1 -a; \
	    $(all-kconfigs) | xargs $1 -a \
1462
		--regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
1463
	    $(all-defconfigs) | xargs -r $1 -a \
1464 1465 1466 1467 1468 1469
		--regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
	else \
	    $(all-sources) | xargs $1 -a; \
	fi
endef

L
Linus Torvalds 已提交
1470
quiet_cmd_cscope-file = FILELST cscope.files
1471
      cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
L
Linus Torvalds 已提交
1472 1473

quiet_cmd_cscope = MAKE    cscope.out
1474
      cmd_cscope = cscope -b
L
Linus Torvalds 已提交
1475 1476 1477 1478 1479 1480

cscope: FORCE
	$(call cmd,cscope-file)
	$(call cmd,cscope)

quiet_cmd_TAGS = MAKE   $@
1481 1482
define cmd_TAGS
	rm -f $@; \
1483
	$(call xtags,etags)
1484 1485 1486 1487
endef

TAGS: FORCE
	$(call cmd,TAGS)
L
Linus Torvalds 已提交
1488 1489 1490 1491

quiet_cmd_tags = MAKE   $@
define cmd_tags
	rm -f $@; \
1492
	$(call xtags,ctags)
L
Linus Torvalds 已提交
1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504
endef

tags: FORCE
	$(call cmd,tags)


# Scripts to check various things for consistency
# ---------------------------------------------------------------------------

includecheck:
	find * $(RCS_FIND_IGNORE) \
		-name '*.[hcS]' -type f -print | sort \
1505
		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
L
Linus Torvalds 已提交
1506 1507 1508 1509

versioncheck:
	find * $(RCS_FIND_IGNORE) \
		-name '*.[hcS]' -type f -print | sort \
1510
		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
L
Linus Torvalds 已提交
1511 1512 1513 1514

namespacecheck:
	$(PERL) $(srctree)/scripts/namespace.pl

1515 1516 1517
export_report:
	$(PERL) $(srctree)/scripts/export_report.pl

L
Linus Torvalds 已提交
1518 1519 1520
endif #ifeq ($(config-targets),1)
endif #ifeq ($(mixed-targets),1)

1521
PHONY += checkstack kernelrelease kernelversion
J
Jeff Dike 已提交
1522

J
Jeff Dike 已提交
1523 1524 1525 1526 1527 1528 1529 1530 1531
# UML needs a little special treatment here.  It wants to use the host
# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
# else wants $(ARCH), including people doing cross-builds, which means
# that $(SUBARCH) doesn't work here.
ifeq ($(ARCH), um)
CHECKSTACK_ARCH := $(SUBARCH)
else
CHECKSTACK_ARCH := $(ARCH)
endif
L
Linus Torvalds 已提交
1532 1533
checkstack:
	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
J
Jeff Dike 已提交
1534
	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
L
Linus Torvalds 已提交
1535 1536

kernelrelease:
R
Roman Zippel 已提交
1537 1538
	$(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
	$(error kernelrelease not valid - run 'make prepare' to update it))
1539
kernelversion:
1540
	@echo $(KERNELVERSION)
L
Linus Torvalds 已提交
1541

1542 1543
# Single targets
# ---------------------------------------------------------------------------
1544
# Single targets are compatible with:
R
Robert P. J. Day 已提交
1545
# - build with mixed source and output
1546 1547 1548 1549 1550 1551 1552
# - build with separate output dir 'make O=...'
# - external modules
#
#  target-dir => where to store outputfile
#  build-dir  => directory in kernel source tree to use

ifeq ($(KBUILD_EXTMOD),)
S
Sam Ravnborg 已提交
1553
        build-dir  = $(patsubst %/,%,$(dir $@))
1554 1555 1556 1557 1558 1559 1560
        target-dir = $(dir $@)
else
        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
endif

1561
%.s: %.c prepare scripts FORCE
1562
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1563
%.i: %.c prepare scripts FORCE
1564
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1565
%.o: %.c prepare scripts FORCE
1566
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1567
%.lst: %.c prepare scripts FORCE
1568
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1569
%.s: %.S prepare scripts FORCE
1570
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1571
%.o: %.S prepare scripts FORCE
1572
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1573 1574
%.symtypes: %.c prepare scripts FORCE
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1575

1576 1577
# Modules
/ %/: prepare scripts FORCE
S
Sam Ravnborg 已提交
1578
	$(cmd_crmodverdir)
1579
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1580 1581
	$(build)=$(build-dir)
%.ko: prepare scripts FORCE
S
Sam Ravnborg 已提交
1582
	$(cmd_crmodverdir)
1583
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1584
	$(build)=$(build-dir) $(@:.ko=.o)
S
Sam Ravnborg 已提交
1585
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1586

L
Linus Torvalds 已提交
1587 1588 1589 1590 1591 1592 1593 1594 1595
# FIXME Should go into a make.lib or something 
# ===========================================================================

quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
      cmd_rmdirs = rm -rf $(rm-dirs)

quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
      cmd_rmfiles = rm -f $(rm-files)

1596
# Run depmod only if we have System.map and depmod is executable
1597 1598
quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
      cmd_depmod = \
1599
	if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1600 1601 1602 1603 1604
		$(DEPMOD) -ae -F System.map                                     \
		$(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r)   \
		$(KERNELRELEASE);                                               \
	fi

S
Sam Ravnborg 已提交
1605
# Create temporary dir for module support files
1606 1607 1608
# clean it up only when building all modules
cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
L
Linus Torvalds 已提交
1609

1610
a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1611
	  $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1612
	  $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
L
Linus Torvalds 已提交
1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633

quiet_cmd_as_o_S = AS      $@
cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<

# read all saved command lines

targets := $(wildcard $(sort $(targets)))
cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))

ifneq ($(cmd_files),)
  $(cmd_files): ;	# Do not try to update included dependency files
  include $(cmd_files)
endif

# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
# Usage:
# $(Q)$(MAKE) $(clean)=dir
clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj

endif	# skip-makefile

1634
PHONY += FORCE
L
Linus Torvalds 已提交
1635
FORCE:
1636 1637 1638 1639

# Declare the contents of the .PHONY variable as phony.  We keep that
# information in a variable se we can use it in if_changed and friends.
.PHONY: $(PHONY)