Makefile 46.9 KB
Newer Older
L
Linus Torvalds 已提交
1 2
VERSION = 2
PATCHLEVEL = 6
L
Linus Torvalds 已提交
3
SUBLEVEL = 18
L
Linus Torvalds 已提交
4 5
EXTRAVERSION =
NAME=Avast! A bilge rat!
L
Linus Torvalds 已提交
6 7 8 9 10 11 12 13 14 15 16 17 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

# *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.

# Do not print "Entering directory ..."
MAKEFLAGS += --no-print-directory

# 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

44 45 46
# Call checker as part of compilation of C files
# Use 'make C=1' to enable checking (sparse, by default)
# Override with 'make C=1 CHECK=checker_executable CHECKFLAGS=....'
L
Linus Torvalds 已提交
47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74

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
75
#
L
Linus Torvalds 已提交
76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98
# 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
99
PHONY := _all
L
Linus Torvalds 已提交
100 101 102 103 104 105 106 107 108 109
_all:

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))

110
PHONY += $(MAKECMDGOALS)
L
Linus Torvalds 已提交
111

112
$(filter-out _all,$(MAKECMDGOALS)) _all:
113 114
	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
	KBUILD_SRC=$(CURDIR) \
115
	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
L
Linus Torvalds 已提交
116 117 118 119 120 121 122 123 124 125 126

# 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
127
PHONY += all
L
Linus Torvalds 已提交
128 129 130 131 132 133 134 135 136 137 138 139 140
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)

141
VPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
L
Linus Torvalds 已提交
142 143 144 145 146 147 148 149 150 151 152 153

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/ \
154
				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
155
				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
L
Linus Torvalds 已提交
156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181

# 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

ARCH		?= $(SUBARCH)
CROSS_COMPILE	?=

# Architecture as present in compile.h
UTS_MACHINE := $(ARCH)

R
Roman Zippel 已提交
182 183
KCONFIG_CONFIG	?= .config

L
Linus Torvalds 已提交
184 185 186 187 188
# 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
189 190 191 192
HOSTCC       = gcc
HOSTCXX      = g++
HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
HOSTCXXFLAGS = -O2
L
Linus Torvalds 已提交
193

S
Sam Ravnborg 已提交
194 195
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
L
Linus Torvalds 已提交
196 197 198 199 200 201 202

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
203
#	make sure the checksums are up to date before we record them.
L
Linus Torvalds 已提交
204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220

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

221
export KBUILD_MODULES KBUILD_BUILTIN
L
Linus Torvalds 已提交
222 223 224 225 226 227 228 229 230 231 232 233 234 235
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
236
# If it is set to "silent_", nothing will be printed at all, since
L
Linus Torvalds 已提交
237 238
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
A
Adrian Bunk 已提交
239
# A simple variant is to prefix commands with $(Q) - that's useful
L
Linus Torvalds 已提交
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267
# 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)

S
Sam Ravnborg 已提交
268
# We need some generic definitions
S
Sam Ravnborg 已提交
269
include  $(srctree)/scripts/Kbuild.include
S
Sam Ravnborg 已提交
270

271
# Do not use make's built-in rules and variables
S
Sam Ravnborg 已提交
272
# This increases performance and avoid hard-to-debug behavour
273
MAKEFLAGS += -rR
L
Linus Torvalds 已提交
274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292

# 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
293
CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
L
Linus Torvalds 已提交
294 295 296 297 298 299 300 301 302 303 304
MODFLAGS	= -DMODULE
CFLAGS_MODULE   = $(MODFLAGS)
AFLAGS_MODULE   = $(MODFLAGS)
LDFLAGS_MODULE  = -r
CFLAGS_KERNEL	=
AFLAGS_KERNEL	=


# Use LINUXINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
LINUXINCLUDE    := -Iinclude \
305
                   $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
306
		   -include include/linux/autoconf.h
L
Linus Torvalds 已提交
307 308 309

CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)

S
Sam Ravnborg 已提交
310 311 312
CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
                   -fno-strict-aliasing -fno-common
AFLAGS          := -D__ASSEMBLY__
L
Linus Torvalds 已提交
313

R
Roman Zippel 已提交
314 315
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
316
KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
317

S
Sam Ravnborg 已提交
318 319 320 321
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
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
322 323

export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
S
Sam Ravnborg 已提交
324
export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
L
Linus Torvalds 已提交
325 326 327 328 329 330 331 332 333
export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE

# 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

334 335
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
336 337 338 339 340

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

# Basic helpers built in scripts/
341
PHONY += scripts_basic
L
Linus Torvalds 已提交
342 343 344
scripts_basic:
	$(Q)$(MAKE) $(build)=scripts/basic

345 346 347
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;

348
PHONY += outputmakefile
349 350 351
# 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
352
outputmakefile:
353 354 355 356
ifneq ($(KBUILD_SRC),)
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif
L
Linus Torvalds 已提交
357 358 359 360 361

# 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
362
# For example 'make oldconfig all'.
L
Linus Torvalds 已提交
363 364 365 366
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).

no-dot-config-targets := clean mrproper distclean \
367
			 cscope TAGS tags help %docs check% \
368
			 include/linux/version.h headers_% \
369
			 kernelrelease kernelversion
L
Linus Torvalds 已提交
370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409

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'
include $(srctree)/arch/$(ARCH)/Makefile
export KBUILD_DEFCONFIG

410
config %config: scripts_basic outputmakefile FORCE
R
Roman Zippel 已提交
411
	$(Q)mkdir -p include/linux include/config
L
Linus Torvalds 已提交
412 413 414 415 416 417 418 419 420 421
	$(Q)$(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
422
# in parallel
423
PHONY += scripts
424
scripts: scripts_basic include/config/auto.conf
L
Linus Torvalds 已提交
425 426 427 428 429 430 431 432 433 434 435
	$(Q)$(MAKE) $(build)=$(@)

# Objects we will link into vmlinux / subdirs we need to visit
init-y		:= init/
drivers-y	:= drivers/ sound/
net-y		:= net/
libs-y		:= lib/
core-y		:= usr/
endif # KBUILD_EXTMOD

ifeq ($(dot-config),1)
436 437
# Read in config
-include include/config/auto.conf
L
Linus Torvalds 已提交
438

439
ifeq ($(KBUILD_EXTMOD),)
L
Linus Torvalds 已提交
440 441
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
R
Roman Zippel 已提交
442
-include include/config/auto.conf.cmd
L
Linus Torvalds 已提交
443 444

# To avoid any implicit rule to kick in, define an empty command
R
Roman Zippel 已提交
445
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
L
Linus Torvalds 已提交
446

R
Roman Zippel 已提交
447
# If .config is newer than include/config/auto.conf, someone tinkered
448
# with it and forgot to run make oldconfig.
S
Sam Ravnborg 已提交
449
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
450
# we execute the config step to be sure to catch updated Kconfig files
R
Roman Zippel 已提交
451
include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
L
Linus Torvalds 已提交
452
	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
453
else
454 455 456 457 458 459 460 461 462 463 464 465 466 467
# 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
468

L
Linus Torvalds 已提交
469 470
else
# Dummy target needed, because used as prerequisite
R
Roman Zippel 已提交
471
include/config/auto.conf: ;
472
endif # $(dot-config)
L
Linus Torvalds 已提交
473 474 475 476

# 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
477
# Defaults vmlinux but it is usually overridden in the arch makefile
L
Linus Torvalds 已提交
478 479 480 481 482 483 484 485
all: vmlinux

ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
CFLAGS		+= -Os
else
CFLAGS		+= -O2
endif

486 487
include $(srctree)/arch/$(ARCH)/Makefile

L
Linus Torvalds 已提交
488
ifdef CONFIG_FRAME_POINTER
489
CFLAGS		+= -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
L
Linus Torvalds 已提交
490 491 492 493
else
CFLAGS		+= -fomit-frame-pointer
endif

J
Jan Beulich 已提交
494 495 496 497
ifdef CONFIG_UNWIND_INFO
CFLAGS		+= -fasynchronous-unwind-tables
endif

L
Linus Torvalds 已提交
498 499 500 501
ifdef CONFIG_DEBUG_INFO
CFLAGS		+= -g
endif

502 503
# Force gcc to behave correct even for buggy distributions
CFLAGS          += $(call cc-option, -fno-stack-protector)
L
Linus Torvalds 已提交
504

505
# arch Makefile may override CC so keep this after arch Makefile is included
506
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
507 508
CHECKFLAGS     += $(NOSTDINC_FLAGS)

L
Linus Torvalds 已提交
509 510 511
# warn about C99 declaration after statement
CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)

S
Sam Ravnborg 已提交
512
# disable pointer signed / unsigned warnings in gcc 4.0
L
Linus Torvalds 已提交
513 514 515
CFLAGS += $(call cc-option,-Wno-pointer-sign,)

# Default kernel image to build when no specific target is given.
S
Sam Ravnborg 已提交
516
# KBUILD_IMAGE may be overruled on the command line or
L
Linus Torvalds 已提交
517 518 519 520 521 522 523 524 525 526 527 528 529
# 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
530
# makefile but the argument can be passed to make if needed.
L
Linus Torvalds 已提交
531 532
#

533
MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
L
Linus Torvalds 已提交
534 535
export MODLIB

536 537 538 539 540 541 542 543
#
#  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
544
mod_strip_cmd = $(STRIP) --strip-debug
545 546 547 548 549 550 551 552
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
553 554

ifeq ($(KBUILD_EXTMOD),)
555
core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
L
Linus Torvalds 已提交
556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575

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
576
# vmlinux is built from the objects selected by $(vmlinux-init) and
L
Linus Torvalds 已提交
577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616
# $(vmlinux-main). Most are built-in.o files from top-level directories
# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
# 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) $(vmlinux-main)
vmlinux-lds  := arch/$(ARCH)/kernel/vmlinux.lds

# 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                  \
      $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)

# Generate new vmlinux version
quiet_cmd_vmlinux_version = GEN     .version
      cmd_vmlinux_version = set -e;                     \
617 618 619 620 621 622 623
	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
624 625 626
	$(MAKE) $(build)=init

# Generate System.map
S
Sam Ravnborg 已提交
627
quiet_cmd_sysmap = SYSMAP
L
Linus Torvalds 已提交
628 629 630 631 632
      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
633 634
# 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
635
define rule_vmlinux__
636
	:
L
Linus Torvalds 已提交
637 638 639 640 641
	$(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))

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

642 643 644 645 646 647
	$(Q)$(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
648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679
	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
680 681
	$(Q)$(if $($(quiet)cmd_sysmap),                                      \
	  echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
L
Linus Torvalds 已提交
682
	  $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
683 684 685
	$(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
686 687 688 689 690
		 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
691
# First command is ':' to allow us to use + in front of this rule
L
Linus Torvalds 已提交
692 693
cmd_ksym_ld = $(cmd_vmlinux__)
define rule_ksym_ld
S
Sam Ravnborg 已提交
694
	: 
L
Linus Torvalds 已提交
695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723
	+$(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
724 725 726 727 728 729 730 731 732 733
# 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
734 735 736 737 738
endif # ifdef CONFIG_KALLSYMS

# vmlinux image - including updated kernel symbols
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
	$(call if_changed_rule,vmlinux__)
739
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
740
	$(Q)rm -f .old_version
L
Linus Torvalds 已提交
741 742 743 744 745 746 747 748 749 750 751

# 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

752
PHONY += $(vmlinux-dirs)
753
$(vmlinux-dirs): prepare scripts
L
Linus Torvalds 已提交
754 755
	$(Q)$(MAKE) $(build)=$@

756
# Build the kernel release string
R
Roman Zippel 已提交
757
# The KERNELRELEASE is stored in a file named include/config/kernel.release
758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774
# to be used when executing for example make install or make modules_install
#
# Take the contents of any files called localversion* and the config
# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
# LOCALVERSION from the command line override all of this

nullstring :=
space      := $(nullstring) # end of line

___localver = $(objtree)/localversion* $(srctree)/localversion*
__localver  = $(sort $(wildcard $(___localver)))
# skip backup files (containing '~')
_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))

localver = $(subst $(space),, \
	   $(shell cat /dev/null $(_localver)) \
	   $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
S
Sam Ravnborg 已提交
775

776 777
# 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
778
# The appended tag is determined by the SCM used.
779 780 781 782 783 784 785 786 787 788 789 790
#
# 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
791
# Store (new) KERNELRELASE string in include/config/kernel.release
792
kernelrelease = $(KERNELVERSION)$(localver-full)
R
Roman Zippel 已提交
793
include/config/kernel.release: include/config/auto.conf FORCE
794 795
	$(Q)rm -f $@
	$(Q)echo $(kernelrelease) > $@
796 797


L
Linus Torvalds 已提交
798
# Things we need to do before we recursively start building the kernel
799 800 801 802
# 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
803

804
# Listed in dependency order
805
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
806 807

# prepare-all is deprecated, use prepare as valid replacement
808
PHONY += prepare-all
L
Linus Torvalds 已提交
809

810
# prepare3 is used to check if we are building in a separate output directory,
L
Linus Torvalds 已提交
811 812 813
# and if so do:
# 1) Check that make has not been executed in the kernel src $(srctree)
# 2) Create the include2 directory, used for the second asm symlink
R
Roman Zippel 已提交
814
prepare3: include/config/kernel.release
L
Linus Torvalds 已提交
815 816
ifneq ($(KBUILD_SRC),)
	@echo '  Using $(srctree) as source for kernel'
R
Roman Zippel 已提交
817
	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
L
Linus Torvalds 已提交
818 819 820 821 822 823 824 825
		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;
	$(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
endif

826 827
# prepare2 creates a makefile if using a separate output directory
prepare2: prepare3 outputmakefile
L
Linus Torvalds 已提交
828

S
Sam Ravnborg 已提交
829 830
prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
                   include/asm include/config/auto.conf
L
Linus Torvalds 已提交
831 832
ifneq ($(KBUILD_MODULES),)
	$(Q)mkdir -p $(MODVERDIR)
833
	$(Q)rm -f $(MODVERDIR)/*
L
Linus Torvalds 已提交
834 835
endif

836 837 838
archprepare: prepare1 scripts_basic

prepare0: archprepare FORCE
839
	$(Q)$(MAKE) $(build)=.
840

L
Linus Torvalds 已提交
841
# All the preparing..
842
prepare prepare-all: prepare0
L
Linus Torvalds 已提交
843

S
Sam Ravnborg 已提交
844 845
# Leave this as default for preprocessing vmlinux.lds.S, which is now
# done in arch/$(ARCH)/kernel/Makefile
L
Linus Torvalds 已提交
846 847 848

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

S
Sam Ravnborg 已提交
849 850 851
# FIXME: The asm symlink changes when $(ARCH) changes. That's
# hard to detect, but I suppose "make mrproper" is a good idea
# before switching between archs anyway.
L
Linus Torvalds 已提交
852 853 854 855 856 857 858 859 860 861 862 863 864

include/asm:
	@echo '  SYMLINK $@ -> include/asm-$(ARCH)'
	$(Q)if [ ! -d include ]; then mkdir -p include; fi;
	@ln -fsn asm-$(ARCH) $@

# 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
865 866 867 868 869 870 871
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
872 873

define filechk_version.h
S
Sam Ravnborg 已提交
874 875 876
	(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
877 878
endef

S
Sam Ravnborg 已提交
879
include/linux/version.h: $(srctree)/Makefile FORCE
L
Linus Torvalds 已提交
880 881
	$(call filechk,version.h)

S
Sam Ravnborg 已提交
882 883 884
include/linux/utsrelease.h: include/config/kernel.release FORCE
	$(call filechk,utsrelease.h)

L
Linus Torvalds 已提交
885 886
# ---------------------------------------------------------------------------

887
PHONY += depend dep
L
Linus Torvalds 已提交
888 889 890
depend dep:
	@echo '*** Warning: make $@ is unnecessary now.'

891 892
# ---------------------------------------------------------------------------
# Kernel headers
893
INSTALL_HDR_PATH=$(objtree)/usr
894 895 896
export INSTALL_HDR_PATH

PHONY += headers_install
S
Sam Ravnborg 已提交
897 898
headers_install: include/linux/version.h scripts_basic FORCE
	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
899
	$(Q)rm -rf $(INSTALL_HDR_PATH)/include
S
Sam Ravnborg 已提交
900
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
901

902 903
PHONY += headers_check
headers_check: headers_install
S
Sam Ravnborg 已提交
904
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
905

L
Linus Torvalds 已提交
906 907 908 909 910
# ---------------------------------------------------------------------------
# Modules

ifdef CONFIG_MODULES

S
Sam Ravnborg 已提交
911
# By default, build modules as well
L
Linus Torvalds 已提交
912 913 914 915 916

all: modules

#	Build modules

917
PHONY += modules
L
Linus Torvalds 已提交
918 919
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
	@echo '  Building modules, stage 2.';
S
Sam Ravnborg 已提交
920
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
L
Linus Torvalds 已提交
921 922 923


# Target to prepare building external modules
924
PHONY += modules_prepare
925
modules_prepare: prepare scripts
L
Linus Torvalds 已提交
926 927

# Target to install modules
928
PHONY += modules_install
L
Linus Torvalds 已提交
929 930
modules_install: _modinst_ _modinst_post

931
PHONY += _modinst_
L
Linus Torvalds 已提交
932
_modinst_:
933
	@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
L
Linus Torvalds 已提交
934 935 936 937 938 939 940 941 942 943 944 945
		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
S
Sam Ravnborg 已提交
946
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
L
Linus Torvalds 已提交
947 948 949 950 951 952 953 954 955 956 957

# If System.map exists, run depmod.  This deliberately does not have a
# dependency on System.map since that would run the dependency tree on
# vmlinux.  This depmod is only for convenience to give the initial
# boot a modules.dep even before / is mounted read-write.  However the
# boot script depmod is the master version.
ifeq "$(strip $(INSTALL_MOD_PATH))" ""
depmod_opts	:=
else
depmod_opts	:= -b $(INSTALL_MOD_PATH) -r
endif
958
PHONY += _modinst_post
L
Linus Torvalds 已提交
959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989
_modinst_post: _modinst_
	if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi

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'
990
MRPROPER_DIRS  += include/config include2 usr/include
991
MRPROPER_FILES += .config .config.old include/asm .version .old_version \
S
Sam Ravnborg 已提交
992 993
                  include/linux/autoconf.h include/linux/version.h      \
                  include/linux/utsrelease.h                            \
R
Roman Zippel 已提交
994
		  Module.symvers tags TAGS cscope*
L
Linus Torvalds 已提交
995 996 997 998 999

# clean - Delete most, but leave enough to build external modules
#
clean: rm-dirs  := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
1000
clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
L
Linus Torvalds 已提交
1001

1002
PHONY += $(clean-dirs) clean archclean
L
Linus Torvalds 已提交
1003 1004 1005 1006 1007 1008 1009
$(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
1010
		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1011 1012
		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
		-o -name '*.symtypes' \) \
L
Linus Torvalds 已提交
1013 1014 1015 1016 1017 1018 1019 1020
		-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)

1021
PHONY += $(mrproper-dirs) mrproper archmrproper
L
Linus Torvalds 已提交
1022 1023 1024 1025 1026 1027 1028 1029 1030
$(mrproper-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)

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

# distclean
#
1031
PHONY += distclean
L
Linus Torvalds 已提交
1032 1033 1034

distclean: mrproper
	@find $(srctree) $(RCS_FIND_IGNORE) \
S
Sam Ravnborg 已提交
1035
		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
L
Linus Torvalds 已提交
1036
		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
S
Sam Ravnborg 已提交
1037
		-o -name '.*.rej' -o -size 0 \
L
Linus Torvalds 已提交
1038 1039 1040 1041 1042 1043 1044 1045 1046
		-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
		-type f -print | xargs rm -f


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

1047
%pkg: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
1048
	$(Q)$(MAKE) $(build)=$(package-dir) $@
1049
rpm: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
1050
	$(Q)$(MAKE) $(build)=$(package-dir) $@
L
Linus Torvalds 已提交
1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062


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

boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
boards := $(notdir $(boards))

help:
	@echo  'Cleaning targets:'
	@echo  '  clean		  - remove most generated files but keep the config'
	@echo  '  mrproper	  - remove all generated files + config + various backup files'
1063
	@echo  '  distclean	  - mrproper + patch files'
L
Linus Torvalds 已提交
1064 1065 1066 1067 1068 1069 1070 1071
	@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'
1072
	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
L
Linus Torvalds 已提交
1073 1074
	@echo  '  dir/            - Build all files in dir and below'
	@echo  '  dir/file.[ois]  - Build specified target only'
1075
	@echo  '  dir/file.ko     - Build module including final link'
L
Linus Torvalds 已提交
1076 1077 1078
	@echo  '  rpm		  - Build a kernel as an RPM package'
	@echo  '  tags/TAGS	  - Generate tags file for editors'
	@echo  '  cscope	  - Generate cscope index'
1079
	@echo  '  kernelrelease	  - Output the release version string'
1080
	@echo  '  kernelversion	  - Output the version stored in Makefile'
1081
	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'
1082
	@echo  '                    (default: $(INSTALL_HDR_PATH))'
L
Linus Torvalds 已提交
1083 1084 1085 1086
	@echo  ''
	@echo  'Static analysers'
	@echo  '  checkstack      - Generate a list of stack hogs'
	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1087
	@echo  '  headers_check   - Sanity check on exported headers'
L
Linus Torvalds 已提交
1088 1089
	@echo  ''
	@echo  'Kernel packaging:'
S
Sam Ravnborg 已提交
1090
	@$(MAKE) $(build)=$(package-dir) help
L
Linus Torvalds 已提交
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104
	@echo  ''
	@echo  'Documentation targets:'
	@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
	@echo  ''
	@echo  'Architecture specific targets ($(ARCH)):'
	@$(if $(archhelp),$(archhelp),\
		echo '  No architecture specific help defined for $(ARCH)')
	@echo  ''
	@$(if $(boards), \
		$(foreach b, $(boards), \
		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
		echo '')

	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1105
	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
L
Linus Torvalds 已提交
1106
	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1107 1108
	@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
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
	@echo  ''
	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
	@echo  'For further info see the ./README file'


# 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
1135
#                      Install the modules built in the module directory
L
Linus Torvalds 已提交
1136 1137 1138 1139
#                      Assumes install directory is already created

# We are always building modules
KBUILD_MODULES := 1
1140
PHONY += crmodverdir
L
Linus Torvalds 已提交
1141 1142
crmodverdir:
	$(Q)mkdir -p $(MODVERDIR)
1143
	$(Q)rm -f $(MODVERDIR)/*
L
Linus Torvalds 已提交
1144

1145
PHONY += $(objtree)/Module.symvers
L
Linus Torvalds 已提交
1146 1147 1148 1149 1150 1151 1152 1153
$(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))
1154
PHONY += $(module-dirs) modules
L
Linus Torvalds 已提交
1155 1156 1157 1158 1159
$(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
1160
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
L
Linus Torvalds 已提交
1161

1162
PHONY += modules_install
1163
modules_install: _emodinst_ _emodinst_post
1164

1165 1166
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
PHONY += _emodinst_
1167 1168
_emodinst_:
	$(Q)mkdir -p $(MODLIB)/$(install-dir)
S
Sam Ravnborg 已提交
1169
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
L
Linus Torvalds 已提交
1170

1171 1172 1173 1174 1175 1176 1177 1178 1179
# Run depmod only is we have System.map and depmod is executable
quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
      cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
                      $(DEPMOD) -ae -F System.map             \
                      $(if $(strip $(INSTALL_MOD_PATH)),      \
		      -b $(INSTALL_MOD_PATH) -r)              \
		      $(KERNELRELEASE);                       \
                   fi

1180
PHONY += _emodinst_post
1181 1182 1183
_emodinst_post: _emodinst_
	$(call cmd,depmod)

L
Linus Torvalds 已提交
1184 1185
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))

1186
PHONY += $(clean-dirs) clean
L
Linus Torvalds 已提交
1187 1188 1189 1190 1191 1192 1193
$(clean-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)

clean:	rm-dirs := $(MODVERDIR)
clean: $(clean-dirs)
	$(call cmd,rmdirs)
	@find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
S
Sam Ravnborg 已提交
1194
		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
L
Linus Torvalds 已提交
1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205
		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
		-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  ''
1206 1207

# Dummies...
1208
PHONY += prepare scripts
1209 1210
prepare: ;
scripts: ;
L
Linus Torvalds 已提交
1211 1212 1213 1214 1215 1216 1217 1218 1219
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!

1220
ifeq ($(src),$(obj))
L
Linus Torvalds 已提交
1221 1222 1223 1224 1225
__srctree =
else
__srctree = $(srctree)/
endif

1226 1227 1228 1229 1230 1231 1232
ifeq ($(ALLSOURCE_ARCHS),)
ifeq ($(ARCH),um)
ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
else
ALLINCLUDE_ARCHS := $(ARCH)
endif
else
S
Sam Ravnborg 已提交
1233
#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1234 1235 1236
ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
endif

1237 1238
ALLSOURCE_ARCHS := $(ARCH)

1239 1240
define find-sources
        ( find $(__srctree) $(RCS_FIND_IGNORE) \
L
Linus Torvalds 已提交
1241
	       \( -name include -o -name arch \) -prune -o \
1242
	       -name $1 -print; \
1243 1244
	  for ARCH in $(ALLSOURCE_ARCHS) ; do \
	       find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1245
	            -name $1 -print; \
1246
	  done ; \
L
Linus Torvalds 已提交
1247
	  find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1248
	       -name $1 -print; \
L
Linus Torvalds 已提交
1249 1250
	  find $(__srctree)include $(RCS_FIND_IGNORE) \
	       \( -name config -o -name 'asm-*' \) -prune \
1251
	       -o -name $1 -print; \
1252
	  for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1253
	       find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1254
	            -name $1 -print; \
1255
	  done ; \
L
Linus Torvalds 已提交
1256
	  find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267
	       -name $1 -print )
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
1268 1269 1270
endef

quiet_cmd_cscope-file = FILELST cscope.files
1271
      cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
L
Linus Torvalds 已提交
1272 1273

quiet_cmd_cscope = MAKE    cscope.out
1274
      cmd_cscope = cscope -b
L
Linus Torvalds 已提交
1275 1276 1277 1278 1279 1280

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

quiet_cmd_TAGS = MAKE   $@
1281 1282
define cmd_TAGS
	rm -f $@; \
1283 1284 1285 1286
	ETAGSF=`etags --version | grep -i exuberant >/dev/null &&     \
                echo "-I __initdata,__exitdata,__acquires,__releases  \
                      -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
                      --extra=+f --c-kinds=+px"`;                     \
1287 1288 1289 1290 1291 1292 1293
                $(all-sources) | xargs etags $$ETAGSF -a;             \
	if test "x$$ETAGSF" = x; then                                 \
		$(all-kconfigs) | xargs etags -a                      \
		--regex='/^config[ \t]+\([a-zA-Z0-9_]+\)/\1/';        \
		$(all-defconfigs) | xargs etags -a                    \
		--regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/';     \
	fi
1294 1295 1296 1297
endef

TAGS: FORCE
	$(call cmd,TAGS)
L
Linus Torvalds 已提交
1298 1299 1300 1301 1302


quiet_cmd_tags = MAKE   $@
define cmd_tags
	rm -f $@; \
1303 1304 1305 1306
	CTAGSF=`ctags --version | grep -i exuberant >/dev/null &&     \
                echo "-I __initdata,__exitdata,__acquires,__releases  \
                      -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
                      --extra=+f --c-kinds=+px"`;                     \
1307
                $(all-sources) | xargs ctags $$CTAGSF -a
L
Linus Torvalds 已提交
1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332
endef

tags: FORCE
	$(call cmd,tags)


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

includecheck:
	find * $(RCS_FIND_IGNORE) \
		-name '*.[hcS]' -type f -print | sort \
		| xargs $(PERL) -w scripts/checkincludes.pl

versioncheck:
	find * $(RCS_FIND_IGNORE) \
		-name '*.[hcS]' -type f -print | sort \
		| xargs $(PERL) -w scripts/checkversion.pl

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

endif #ifeq ($(config-targets),1)
endif #ifeq ($(mixed-targets),1)

1333
PHONY += checkstack kernelrelease kernelversion
L
Linus Torvalds 已提交
1334 1335 1336 1337 1338
checkstack:
	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
	$(PERL) $(src)/scripts/checkstack.pl $(ARCH)

kernelrelease:
R
Roman Zippel 已提交
1339 1340
	$(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
	$(error kernelrelease not valid - run 'make prepare' to update it))
1341
kernelversion:
1342
	@echo $(KERNELVERSION)
L
Linus Torvalds 已提交
1343

1344 1345
# Single targets
# ---------------------------------------------------------------------------
1346 1347 1348 1349 1350 1351 1352 1353 1354
# Single targets are compatible with:
# - build whith mixed source and output
# - 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
1355
        build-dir  = $(patsubst %/,%,$(dir $@))
1356 1357 1358 1359 1360 1361 1362
        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

1363
%.s: %.c prepare scripts FORCE
1364
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1365
%.i: %.c prepare scripts FORCE
1366
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1367
%.o: %.c prepare scripts FORCE
1368
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1369
%.lst: %.c prepare scripts FORCE
1370
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1371
%.s: %.S prepare scripts FORCE
1372
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1373
%.o: %.S prepare scripts FORCE
1374
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1375 1376
%.symtypes: %.c prepare scripts FORCE
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1377

1378 1379
# Modules
/ %/: prepare scripts FORCE
1380
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1381 1382
	$(build)=$(build-dir)
%.ko: prepare scripts FORCE
1383
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1384
	$(build)=$(build-dir) $(@:.ko=.o)
S
Sam Ravnborg 已提交
1385
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1386

L
Linus Torvalds 已提交
1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398
# 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)


a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
	  $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1399
	  $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
L
Linus Torvalds 已提交
1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420

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

1421
PHONY += FORCE
L
Linus Torvalds 已提交
1422
FORCE:
1423 1424 1425 1426 1427


# 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)