Makefile 47.1 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 47 48 49 50 51 52
# 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
53 54 55 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

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
81
#
L
Linus Torvalds 已提交
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
# 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
105
PHONY := _all
L
Linus Torvalds 已提交
106 107 108 109 110 111 112 113 114 115
_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))

116
PHONY += $(MAKECMDGOALS)
L
Linus Torvalds 已提交
117

118
$(filter-out _all,$(MAKECMDGOALS)) _all:
119 120
	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
	KBUILD_SRC=$(CURDIR) \
121
	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
L
Linus Torvalds 已提交
122 123 124 125 126 127 128 129 130 131 132

# 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
133
PHONY += all
L
Linus Torvalds 已提交
134 135 136 137 138 139 140 141 142 143 144 145 146
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)

147
VPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
L
Linus Torvalds 已提交
148 149 150 151 152 153 154 155 156 157 158 159

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/ \
160
				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
161
				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
L
Linus Torvalds 已提交
162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187

# 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
188 189
KCONFIG_CONFIG	?= .config

L
Linus Torvalds 已提交
190 191 192 193 194
# 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
195 196 197 198
HOSTCC       = gcc
HOSTCXX      = g++
HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
HOSTCXXFLAGS = -O2
L
Linus Torvalds 已提交
199

S
Sam Ravnborg 已提交
200 201
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
L
Linus Torvalds 已提交
202 203 204 205 206 207 208

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
209
#	make sure the checksums are up to date before we record them.
L
Linus Torvalds 已提交
210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226

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

227
export KBUILD_MODULES KBUILD_BUILTIN
L
Linus Torvalds 已提交
228 229 230 231 232 233 234 235 236 237 238 239 240 241
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
242
# If it is set to "silent_", nothing will be printed at all, since
L
Linus Torvalds 已提交
243 244
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
A
Adrian Bunk 已提交
245
# A simple variant is to prefix commands with $(Q) - that's useful
L
Linus Torvalds 已提交
246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273
# 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
274
# We need some generic definitions
S
Sam Ravnborg 已提交
275
include  $(srctree)/scripts/Kbuild.include
S
Sam Ravnborg 已提交
276

277
# Do not use make's built-in rules and variables
S
Sam Ravnborg 已提交
278
# This increases performance and avoid hard-to-debug behavour
279
MAKEFLAGS += -rR
L
Linus Torvalds 已提交
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298

# 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
299
CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
L
Linus Torvalds 已提交
300 301 302 303 304 305 306 307 308 309 310
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 \
311
                   $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
312
		   -include include/linux/autoconf.h
L
Linus Torvalds 已提交
313 314 315

CPPFLAGS        := -D__KERNEL__ $(LINUXINCLUDE)

S
Sam Ravnborg 已提交
316 317 318
CFLAGS          := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
                   -fno-strict-aliasing -fno-common
AFLAGS          := -D__ASSEMBLY__
L
Linus Torvalds 已提交
319

R
Roman Zippel 已提交
320 321
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
322
KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
323

S
Sam Ravnborg 已提交
324 325 326 327
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
328 329

export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
S
Sam Ravnborg 已提交
330
export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
L
Linus Torvalds 已提交
331 332 333 334 335 336 337 338 339
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

340 341
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
342 343 344 345 346

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

# Basic helpers built in scripts/
347
PHONY += scripts_basic
L
Linus Torvalds 已提交
348 349 350
scripts_basic:
	$(Q)$(MAKE) $(build)=scripts/basic

351 352 353
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;

354
PHONY += outputmakefile
355 356 357
# 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
358
outputmakefile:
359 360 361 362
ifneq ($(KBUILD_SRC),)
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif
L
Linus Torvalds 已提交
363 364 365 366 367

# 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
368
# For example 'make oldconfig all'.
L
Linus Torvalds 已提交
369 370 371 372
# 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 \
373
			 cscope TAGS tags help %docs check% \
374
			 include/linux/version.h headers_% \
375
			 kernelrelease kernelversion
L
Linus Torvalds 已提交
376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415

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

416
config %config: scripts_basic outputmakefile FORCE
R
Roman Zippel 已提交
417
	$(Q)mkdir -p include/linux include/config
L
Linus Torvalds 已提交
418 419 420 421 422 423 424 425 426 427
	$(Q)$(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
428
# in parallel
429
PHONY += scripts
430
scripts: scripts_basic include/config/auto.conf
L
Linus Torvalds 已提交
431 432 433 434 435 436 437 438 439 440 441
	$(Q)$(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)
442 443
# Read in config
-include include/config/auto.conf
L
Linus Torvalds 已提交
444

445
ifeq ($(KBUILD_EXTMOD),)
L
Linus Torvalds 已提交
446 447
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
R
Roman Zippel 已提交
448
-include include/config/auto.conf.cmd
L
Linus Torvalds 已提交
449 450

# To avoid any implicit rule to kick in, define an empty command
R
Roman Zippel 已提交
451
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
L
Linus Torvalds 已提交
452

R
Roman Zippel 已提交
453
# If .config is newer than include/config/auto.conf, someone tinkered
454
# with it and forgot to run make oldconfig.
S
Sam Ravnborg 已提交
455
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
456
# we execute the config step to be sure to catch updated Kconfig files
R
Roman Zippel 已提交
457
include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
L
Linus Torvalds 已提交
458
	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
459
else
460 461 462 463 464 465 466 467 468 469 470 471 472 473
# 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
474

L
Linus Torvalds 已提交
475 476
else
# Dummy target needed, because used as prerequisite
R
Roman Zippel 已提交
477
include/config/auto.conf: ;
478
endif # $(dot-config)
L
Linus Torvalds 已提交
479 480 481 482

# 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
483
# Defaults vmlinux but it is usually overridden in the arch makefile
L
Linus Torvalds 已提交
484 485 486 487 488 489 490 491
all: vmlinux

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

492 493
include $(srctree)/arch/$(ARCH)/Makefile

L
Linus Torvalds 已提交
494
ifdef CONFIG_FRAME_POINTER
495
CFLAGS		+= -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
L
Linus Torvalds 已提交
496 497 498 499
else
CFLAGS		+= -fomit-frame-pointer
endif

J
Jan Beulich 已提交
500 501 502 503
ifdef CONFIG_UNWIND_INFO
CFLAGS		+= -fasynchronous-unwind-tables
endif

L
Linus Torvalds 已提交
504 505 506 507
ifdef CONFIG_DEBUG_INFO
CFLAGS		+= -g
endif

508 509
# Force gcc to behave correct even for buggy distributions
CFLAGS          += $(call cc-option, -fno-stack-protector)
L
Linus Torvalds 已提交
510

511
# arch Makefile may override CC so keep this after arch Makefile is included
512
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
513 514
CHECKFLAGS     += $(NOSTDINC_FLAGS)

L
Linus Torvalds 已提交
515 516 517
# warn about C99 declaration after statement
CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)

S
Sam Ravnborg 已提交
518
# disable pointer signed / unsigned warnings in gcc 4.0
L
Linus Torvalds 已提交
519 520 521
CFLAGS += $(call cc-option,-Wno-pointer-sign,)

# Default kernel image to build when no specific target is given.
S
Sam Ravnborg 已提交
522
# KBUILD_IMAGE may be overruled on the command line or
L
Linus Torvalds 已提交
523 524 525 526 527 528 529 530 531 532 533 534 535
# 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
536
# makefile but the argument can be passed to make if needed.
L
Linus Torvalds 已提交
537 538
#

539
MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
L
Linus Torvalds 已提交
540 541
export MODLIB

542 543 544 545 546 547 548 549
#
#  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
550
mod_strip_cmd = $(STRIP) --strip-debug
551 552 553 554 555 556 557 558
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
559 560

ifeq ($(KBUILD_EXTMOD),)
561
core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
L
Linus Torvalds 已提交
562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581

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
582
# vmlinux is built from the objects selected by $(vmlinux-init) and
L
Linus Torvalds 已提交
583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622
# $(vmlinux-main). Most are built-in.o files from top-level directories
# in the kernel tree, others are specified in arch/$(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;                     \
623 624 625 626 627 628 629
	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
630 631 632
	$(MAKE) $(build)=init

# Generate System.map
S
Sam Ravnborg 已提交
633
quiet_cmd_sysmap = SYSMAP
L
Linus Torvalds 已提交
634 635 636 637 638
      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
639 640
# 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
641
define rule_vmlinux__
642
	:
L
Linus Torvalds 已提交
643 644 645 646 647
	$(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))

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

648 649 650 651 652 653
	$(Q)$(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
654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685
	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
686 687
	$(Q)$(if $($(quiet)cmd_sysmap),                                      \
	  echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
L
Linus Torvalds 已提交
688
	  $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
689 690 691
	$(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
692 693 694 695 696
		 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
697
# First command is ':' to allow us to use + in front of this rule
L
Linus Torvalds 已提交
698 699
cmd_ksym_ld = $(cmd_vmlinux__)
define rule_ksym_ld
S
Sam Ravnborg 已提交
700
	: 
L
Linus Torvalds 已提交
701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729
	+$(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
730 731 732 733 734 735 736 737 738 739
# 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
740 741 742 743 744
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__)
745
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
746
	$(Q)rm -f .old_version
L
Linus Torvalds 已提交
747 748 749 750 751 752 753 754 755 756 757

# 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

758
PHONY += $(vmlinux-dirs)
759
$(vmlinux-dirs): prepare scripts
L
Linus Torvalds 已提交
760 761
	$(Q)$(MAKE) $(build)=$@

762
# Build the kernel release string
R
Roman Zippel 已提交
763
# The KERNELRELEASE is stored in a file named include/config/kernel.release
764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780
# 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
781

782 783
# 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
784
# The appended tag is determined by the SCM used.
785 786 787 788 789 790 791 792 793 794 795 796
#
# 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
797
# Store (new) KERNELRELASE string in include/config/kernel.release
798
kernelrelease = $(KERNELVERSION)$(localver-full)
R
Roman Zippel 已提交
799
include/config/kernel.release: include/config/auto.conf FORCE
800 801
	$(Q)rm -f $@
	$(Q)echo $(kernelrelease) > $@
802 803


L
Linus Torvalds 已提交
804
# Things we need to do before we recursively start building the kernel
805 806 807 808
# 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
809

810
# Listed in dependency order
811
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
812 813

# prepare-all is deprecated, use prepare as valid replacement
814
PHONY += prepare-all
L
Linus Torvalds 已提交
815

816
# prepare3 is used to check if we are building in a separate output directory,
L
Linus Torvalds 已提交
817 818 819
# and if so do:
# 1) Check that make has not been executed in the kernel src $(srctree)
# 2) Create the include2 directory, used for the second asm symlink
R
Roman Zippel 已提交
820
prepare3: include/config/kernel.release
L
Linus Torvalds 已提交
821 822
ifneq ($(KBUILD_SRC),)
	@echo '  Using $(srctree) as source for kernel'
R
Roman Zippel 已提交
823
	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
L
Linus Torvalds 已提交
824 825 826 827 828 829 830 831
		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

832 833
# prepare2 creates a makefile if using a separate output directory
prepare2: prepare3 outputmakefile
L
Linus Torvalds 已提交
834

S
Sam Ravnborg 已提交
835 836
prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
                   include/asm include/config/auto.conf
L
Linus Torvalds 已提交
837 838
ifneq ($(KBUILD_MODULES),)
	$(Q)mkdir -p $(MODVERDIR)
839
	$(Q)rm -f $(MODVERDIR)/*
L
Linus Torvalds 已提交
840 841
endif

842 843 844
archprepare: prepare1 scripts_basic

prepare0: archprepare FORCE
845
	$(Q)$(MAKE) $(build)=.
846

L
Linus Torvalds 已提交
847
# All the preparing..
848
prepare prepare-all: prepare0
L
Linus Torvalds 已提交
849

S
Sam Ravnborg 已提交
850 851
# Leave this as default for preprocessing vmlinux.lds.S, which is now
# done in arch/$(ARCH)/kernel/Makefile
L
Linus Torvalds 已提交
852 853 854

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

S
Sam Ravnborg 已提交
855 856 857
# 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
858 859 860 861 862 863 864 865 866 867 868 869 870

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
871 872 873 874 875 876 877
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
878 879

define filechk_version.h
S
Sam Ravnborg 已提交
880 881 882
	(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
883 884
endef

S
Sam Ravnborg 已提交
885
include/linux/version.h: $(srctree)/Makefile FORCE
L
Linus Torvalds 已提交
886 887
	$(call filechk,version.h)

S
Sam Ravnborg 已提交
888 889 890
include/linux/utsrelease.h: include/config/kernel.release FORCE
	$(call filechk,utsrelease.h)

L
Linus Torvalds 已提交
891 892
# ---------------------------------------------------------------------------

893
PHONY += depend dep
L
Linus Torvalds 已提交
894 895 896
depend dep:
	@echo '*** Warning: make $@ is unnecessary now.'

897 898
# ---------------------------------------------------------------------------
# Kernel headers
899
INSTALL_HDR_PATH=$(objtree)/usr
900 901 902
export INSTALL_HDR_PATH

PHONY += headers_install
S
Sam Ravnborg 已提交
903 904
headers_install: include/linux/version.h scripts_basic FORCE
	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
905
	$(Q)rm -rf $(INSTALL_HDR_PATH)/include
S
Sam Ravnborg 已提交
906
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
907

908 909
PHONY += headers_check
headers_check: headers_install
S
Sam Ravnborg 已提交
910
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
911

L
Linus Torvalds 已提交
912 913 914 915 916
# ---------------------------------------------------------------------------
# Modules

ifdef CONFIG_MODULES

S
Sam Ravnborg 已提交
917
# By default, build modules as well
L
Linus Torvalds 已提交
918 919 920 921 922

all: modules

#	Build modules

923
PHONY += modules
L
Linus Torvalds 已提交
924 925
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
	@echo '  Building modules, stage 2.';
S
Sam Ravnborg 已提交
926
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
L
Linus Torvalds 已提交
927 928 929


# Target to prepare building external modules
930
PHONY += modules_prepare
931
modules_prepare: prepare scripts
L
Linus Torvalds 已提交
932 933

# Target to install modules
934
PHONY += modules_install
L
Linus Torvalds 已提交
935 936
modules_install: _modinst_ _modinst_post

937
PHONY += _modinst_
L
Linus Torvalds 已提交
938
_modinst_:
939
	@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
L
Linus Torvalds 已提交
940 941 942 943 944 945 946 947 948 949 950 951
		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
952
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
L
Linus Torvalds 已提交
953 954 955 956 957 958 959 960 961 962 963

# 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
964
PHONY += _modinst_post
L
Linus Torvalds 已提交
965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995
_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'
996
MRPROPER_DIRS  += include/config include2 usr/include
997
MRPROPER_FILES += .config .config.old include/asm .version .old_version \
S
Sam Ravnborg 已提交
998 999
                  include/linux/autoconf.h include/linux/version.h      \
                  include/linux/utsrelease.h                            \
R
Roman Zippel 已提交
1000
		  Module.symvers tags TAGS cscope*
L
Linus Torvalds 已提交
1001 1002 1003 1004 1005

# clean - Delete most, but leave enough to build external modules
#
clean: rm-dirs  := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
1006
clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
L
Linus Torvalds 已提交
1007

1008
PHONY += $(clean-dirs) clean archclean
L
Linus Torvalds 已提交
1009 1010 1011 1012 1013 1014 1015
$(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
1016
		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1017 1018
		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
		-o -name '*.symtypes' \) \
L
Linus Torvalds 已提交
1019 1020 1021 1022 1023 1024 1025 1026
		-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)

1027
PHONY += $(mrproper-dirs) mrproper archmrproper
L
Linus Torvalds 已提交
1028 1029 1030 1031 1032 1033 1034 1035 1036
$(mrproper-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)

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

# distclean
#
1037
PHONY += distclean
L
Linus Torvalds 已提交
1038 1039 1040

distclean: mrproper
	@find $(srctree) $(RCS_FIND_IGNORE) \
S
Sam Ravnborg 已提交
1041
		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
L
Linus Torvalds 已提交
1042
		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
S
Sam Ravnborg 已提交
1043
		-o -name '.*.rej' -o -size 0 \
L
Linus Torvalds 已提交
1044 1045 1046 1047 1048 1049 1050 1051 1052
		-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
		-type f -print | xargs rm -f


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

1053
%pkg: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
1054
	$(Q)$(MAKE) $(build)=$(package-dir) $@
1055
rpm: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
1056
	$(Q)$(MAKE) $(build)=$(package-dir) $@
L
Linus Torvalds 已提交
1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068


# 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'
1069
	@echo  '  distclean	  - mrproper + patch files'
L
Linus Torvalds 已提交
1070 1071 1072 1073 1074 1075 1076 1077
	@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'
1078
	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
L
Linus Torvalds 已提交
1079 1080
	@echo  '  dir/            - Build all files in dir and below'
	@echo  '  dir/file.[ois]  - Build specified target only'
1081
	@echo  '  dir/file.ko     - Build module including final link'
L
Linus Torvalds 已提交
1082 1083 1084
	@echo  '  rpm		  - Build a kernel as an RPM package'
	@echo  '  tags/TAGS	  - Generate tags file for editors'
	@echo  '  cscope	  - Generate cscope index'
1085
	@echo  '  kernelrelease	  - Output the release version string'
1086
	@echo  '  kernelversion	  - Output the version stored in Makefile'
1087
	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'
1088
	@echo  '                    (default: $(INSTALL_HDR_PATH))'
L
Linus Torvalds 已提交
1089 1090 1091 1092
	@echo  ''
	@echo  'Static analysers'
	@echo  '  checkstack      - Generate a list of stack hogs'
	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1093
	@echo  '  headers_check   - Sanity check on exported headers'
L
Linus Torvalds 已提交
1094 1095
	@echo  ''
	@echo  'Kernel packaging:'
S
Sam Ravnborg 已提交
1096
	@$(MAKE) $(build)=$(package-dir) help
L
Linus Torvalds 已提交
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110
	@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'
1111
	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
L
Linus Torvalds 已提交
1112
	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1113 1114
	@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
1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
	@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
1141
#                      Install the modules built in the module directory
L
Linus Torvalds 已提交
1142 1143 1144 1145
#                      Assumes install directory is already created

# We are always building modules
KBUILD_MODULES := 1
1146
PHONY += crmodverdir
L
Linus Torvalds 已提交
1147 1148
crmodverdir:
	$(Q)mkdir -p $(MODVERDIR)
1149
	$(Q)rm -f $(MODVERDIR)/*
L
Linus Torvalds 已提交
1150

1151
PHONY += $(objtree)/Module.symvers
L
Linus Torvalds 已提交
1152 1153 1154 1155 1156 1157 1158 1159
$(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))
1160
PHONY += $(module-dirs) modules
L
Linus Torvalds 已提交
1161 1162 1163 1164 1165
$(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
1166
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
L
Linus Torvalds 已提交
1167

1168
PHONY += modules_install
1169
modules_install: _emodinst_ _emodinst_post
1170

1171 1172
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
PHONY += _emodinst_
1173 1174
_emodinst_:
	$(Q)mkdir -p $(MODLIB)/$(install-dir)
S
Sam Ravnborg 已提交
1175
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
L
Linus Torvalds 已提交
1176

1177 1178 1179 1180 1181 1182 1183 1184 1185
# 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

1186
PHONY += _emodinst_post
1187 1188 1189
_emodinst_post: _emodinst_
	$(call cmd,depmod)

L
Linus Torvalds 已提交
1190 1191
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))

1192
PHONY += $(clean-dirs) clean
L
Linus Torvalds 已提交
1193 1194 1195 1196 1197 1198 1199
$(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
1200
		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
L
Linus Torvalds 已提交
1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211
		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
		-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  ''
1212 1213

# Dummies...
1214
PHONY += prepare scripts
1215 1216
prepare: ;
scripts: ;
L
Linus Torvalds 已提交
1217 1218 1219 1220 1221 1222 1223 1224 1225
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!

1226
ifeq ($(src),$(obj))
L
Linus Torvalds 已提交
1227 1228 1229 1230 1231
__srctree =
else
__srctree = $(srctree)/
endif

1232 1233 1234 1235 1236 1237 1238
ifeq ($(ALLSOURCE_ARCHS),)
ifeq ($(ARCH),um)
ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
else
ALLINCLUDE_ARCHS := $(ARCH)
endif
else
S
Sam Ravnborg 已提交
1239
#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1240 1241 1242
ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
endif

1243 1244
ALLSOURCE_ARCHS := $(ARCH)

1245 1246
define find-sources
        ( find $(__srctree) $(RCS_FIND_IGNORE) \
L
Linus Torvalds 已提交
1247
	       \( -name include -o -name arch \) -prune -o \
1248
	       -name $1 -print; \
1249 1250
	  for ARCH in $(ALLSOURCE_ARCHS) ; do \
	       find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1251
	            -name $1 -print; \
1252
	  done ; \
L
Linus Torvalds 已提交
1253
	  find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1254
	       -name $1 -print; \
L
Linus Torvalds 已提交
1255 1256
	  find $(__srctree)include $(RCS_FIND_IGNORE) \
	       \( -name config -o -name 'asm-*' \) -prune \
1257
	       -o -name $1 -print; \
1258
	  for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1259
	       find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1260
	            -name $1 -print; \
1261
	  done ; \
L
Linus Torvalds 已提交
1262
	  find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273
	       -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
1274 1275 1276
endef

quiet_cmd_cscope-file = FILELST cscope.files
1277
      cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
L
Linus Torvalds 已提交
1278 1279

quiet_cmd_cscope = MAKE    cscope.out
1280
      cmd_cscope = cscope -b
L
Linus Torvalds 已提交
1281 1282 1283 1284 1285 1286

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

quiet_cmd_TAGS = MAKE   $@
1287 1288
define cmd_TAGS
	rm -f $@; \
1289 1290 1291 1292
	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"`;                     \
1293 1294 1295 1296 1297 1298 1299
                $(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
1300 1301 1302 1303
endef

TAGS: FORCE
	$(call cmd,TAGS)
L
Linus Torvalds 已提交
1304 1305 1306 1307 1308


quiet_cmd_tags = MAKE   $@
define cmd_tags
	rm -f $@; \
1309 1310 1311 1312
	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"`;                     \
1313
                $(all-sources) | xargs ctags $$CTAGSF -a
L
Linus Torvalds 已提交
1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338
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)

1339
PHONY += checkstack kernelrelease kernelversion
L
Linus Torvalds 已提交
1340 1341 1342 1343 1344
checkstack:
	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
	$(PERL) $(src)/scripts/checkstack.pl $(ARCH)

kernelrelease:
R
Roman Zippel 已提交
1345 1346
	$(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
	$(error kernelrelease not valid - run 'make prepare' to update it))
1347
kernelversion:
1348
	@echo $(KERNELVERSION)
L
Linus Torvalds 已提交
1349

1350 1351
# Single targets
# ---------------------------------------------------------------------------
1352 1353 1354 1355 1356 1357 1358 1359 1360
# 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
1361
        build-dir  = $(patsubst %/,%,$(dir $@))
1362 1363 1364 1365 1366 1367 1368
        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

1369
%.s: %.c prepare scripts FORCE
1370
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1371
%.i: %.c prepare scripts FORCE
1372
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1373
%.o: %.c prepare scripts FORCE
1374
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1375
%.lst: %.c prepare scripts FORCE
1376
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1377
%.s: %.S prepare scripts FORCE
1378
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1379
%.o: %.S prepare scripts FORCE
1380
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1381 1382
%.symtypes: %.c prepare scripts FORCE
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1383

1384 1385
# Modules
/ %/: prepare scripts FORCE
1386
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1387 1388
	$(build)=$(build-dir)
%.ko: prepare scripts FORCE
1389
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1390
	$(build)=$(build-dir) $(@:.ko=.o)
S
Sam Ravnborg 已提交
1391
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1392

L
Linus Torvalds 已提交
1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404
# 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) \
1405
	  $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
L
Linus Torvalds 已提交
1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426

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

1427
PHONY += FORCE
L
Linus Torvalds 已提交
1428
FORCE:
1429 1430 1431 1432 1433


# 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)