Makefile 50.2 KB
Newer Older
L
Linus Torvalds 已提交
1 2
VERSION = 2
PATCHLEVEL = 6
L
Linus Torvalds 已提交
3
SUBLEVEL = 33
L
Linus Torvalds 已提交
4
EXTRAVERSION = -rc6
L
Linus Torvalds 已提交
5
NAME = Man-Eating Seals of Antiquity
L
Linus Torvalds 已提交
6 7 8 9 10 11 12

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

13 14
# Do not:
# o  use make's built-in rules and variables
15
#    (this increases performance and avoids hard-to-debug behaviour);
16 17
# o  print "Entering directory ...";
MAKEFLAGS += -rR --no-print-directory
L
Linus Torvalds 已提交
18

19
# Avoid funny character set dependencies
20
unexport LC_ALL
21 22
LC_COLLATE=C
LC_NUMERIC=C
23
export LC_COLLATE LC_NUMERIC
24

L
Linus Torvalds 已提交
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
# 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

44 45
ifeq ("$(origin V)", "command line")
  KBUILD_VERBOSE = $(V)
L
Linus Torvalds 已提交
46 47 48 49 50
endif
ifndef KBUILD_VERBOSE
  KBUILD_VERBOSE = 0
endif

51 52 53 54 55 56 57 58 59
# 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
60

61 62
ifeq ("$(origin C)", "command line")
  KBUILD_CHECKSRC = $(C)
L
Linus Torvalds 已提交
63 64 65 66 67 68 69 70 71 72 73 74
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

75 76 77
ifeq ("$(origin M)", "command line")
  KBUILD_EXTMOD := $(M)
endif
L
Linus Torvalds 已提交
78 79 80 81 82 83

# kbuild supports saving output files in a separate directory.
# To locate output files in a separate directory two syntaxes are supported.
# In both cases the working directory must be the root of the kernel src.
# 1) O=
# Use "make O=dir/to/store/output/files/"
S
Sam Ravnborg 已提交
84
#
L
Linus Torvalds 已提交
85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
# 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?
101 102
ifeq ("$(origin O)", "command line")
  KBUILD_OUTPUT := $(O)
L
Linus Torvalds 已提交
103 104 105
endif

# That's our default target when none is given on the command line
106
PHONY := _all
L
Linus Torvalds 已提交
107 108
_all:

109 110 111
# Cancel implicit rules on top Makefile
$(CURDIR)/Makefile Makefile: ;

L
Linus Torvalds 已提交
112 113 114 115 116 117 118 119
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))

120 121
PHONY += $(MAKECMDGOALS) sub-make

122
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
123 124 125
	$(Q)@:

sub-make: FORCE
126 127
	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
	KBUILD_SRC=$(CURDIR) \
128 129
	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
	$(filter-out _all sub-make,$(MAKECMDGOALS))
L
Linus Torvalds 已提交
130 131 132 133 134 135 136 137 138 139 140

# 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
141
PHONY += all
L
Linus Torvalds 已提交
142 143 144 145 146 147 148 149 150 151 152
ifeq ($(KBUILD_EXTMOD),)
_all: all
else
_all: modules
endif

srctree		:= $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
objtree		:= $(CURDIR)
src		:= $(srctree)
obj		:= $(objtree)

153
VPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
L
Linus Torvalds 已提交
154

155
export srctree objtree VPATH
L
Linus Torvalds 已提交
156 157 158 159 160 161 162 163 164 165


# 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/ \
166
				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
P
Paul Mundt 已提交
167
				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
168
				  -e s/sh[234].*/sh/ )
L
Linus Torvalds 已提交
169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185

# 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.
R
Roland McGrath 已提交
186 187
# A third alternative is to store a setting in .config so that plain
# "make" in the configured kernel build directory always uses that.
L
Linus Torvalds 已提交
188 189
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
190
export KBUILD_BUILDHOST := $(SUBARCH)
191 192
ARCH		?= $(SUBARCH)
CROSS_COMPILE	?=
R
Roland McGrath 已提交
193
CROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
L
Linus Torvalds 已提交
194 195

# Architecture as present in compile.h
196 197
UTS_MACHINE 	:= $(ARCH)
SRCARCH 	:= $(ARCH)
L
Linus Torvalds 已提交
198

199 200 201 202 203 204 205
# Additional ARCH settings for x86
ifeq ($(ARCH),i386)
        SRCARCH := x86
endif
ifeq ($(ARCH),x86_64)
        SRCARCH := x86
endif
206

S
Sam Ravnborg 已提交
207
# Additional ARCH settings for sparc
208
ifeq ($(ARCH),sparc64)
S
Sam Ravnborg 已提交
209
       SRCARCH := sparc
210
endif
211

212 213 214 215 216
# Additional ARCH settings for sh
ifeq ($(ARCH),sh64)
       SRCARCH := sh
endif

S
Sam Ravnborg 已提交
217 218 219
# Where to locate arch specific headers
hdr-arch  := $(SRCARCH)

220 221 222 223
ifeq ($(ARCH),m68knommu)
       hdr-arch  := m68k
endif

R
Roman Zippel 已提交
224 225
KCONFIG_CONFIG	?= .config

L
Linus Torvalds 已提交
226 227 228 229 230
# 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
231 232
HOSTCC       = gcc
HOSTCXX      = g++
233
HOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
S
Sam Ravnborg 已提交
234
HOSTCXXFLAGS = -O2
L
Linus Torvalds 已提交
235

S
Sam Ravnborg 已提交
236 237
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
L
Linus Torvalds 已提交
238 239 240 241 242 243 244

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
245
#	make sure the checksums are up to date before we record them.
L
Linus Torvalds 已提交
246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262

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

263
export KBUILD_MODULES KBUILD_BUILTIN
L
Linus Torvalds 已提交
264 265 266 267 268 269 270 271 272 273 274 275 276 277
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
278
# If it is set to "silent_", nothing will be printed at all, since
L
Linus Torvalds 已提交
279 280
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
A
Adrian Bunk 已提交
281
# A simple variant is to prefix commands with $(Q) - that's useful
L
Linus Torvalds 已提交
282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309
# 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)

310 311
# We need some generic definitions (do not try to remake the file).
$(srctree)/scripts/Kbuild.include: ;
312
include $(srctree)/scripts/Kbuild.include
L
Linus Torvalds 已提交
313 314 315 316 317 318 319 320 321 322 323 324 325 326

# 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
327
INSTALLKERNEL  := installkernel
L
Linus Torvalds 已提交
328 329 330 331 332
DEPMOD		= /sbin/depmod
KALLSYMS	= scripts/kallsyms
PERL		= perl
CHECK		= sparse

333 334
CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
		  -Wbitwise -Wno-return-void $(CF)
335 336 337
CFLAGS_MODULE   =
AFLAGS_MODULE   =
LDFLAGS_MODULE  =
L
Linus Torvalds 已提交
338 339
CFLAGS_KERNEL	=
AFLAGS_KERNEL	=
340
CFLAGS_GCOV	= -fprofile-arcs -ftest-coverage
L
Linus Torvalds 已提交
341 342 343 344


# Use LINUXINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
345
LINUXINCLUDE    := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
346
                   $(if $(KBUILD_SRC), -I$(srctree)/include) \
347
                   -include include/generated/autoconf.h
L
Linus Torvalds 已提交
348

349
KBUILD_CPPFLAGS := -D__KERNEL__
L
Linus Torvalds 已提交
350

351
KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
352
		   -fno-strict-aliasing -fno-common \
353
		   -Werror-implicit-function-declaration \
354 355
		   -Wno-format-security \
		   -fno-delete-null-pointer-checks
356
KBUILD_AFLAGS   := -D__ASSEMBLY__
357 358 359
KBUILD_AFLAGS_MODULE  := -DMODULE
KBUILD_CFLAGS_MODULE  := -DMODULE
KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
L
Linus Torvalds 已提交
360

R
Roman Zippel 已提交
361 362
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
363
KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
364

S
Sam Ravnborg 已提交
365
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
366
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
367 368
export CPP AR NM STRIP OBJCOPY OBJDUMP
export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
S
Sam Ravnborg 已提交
369
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
L
Linus Torvalds 已提交
370

371
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
372
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
373
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
374
export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
L
Linus Torvalds 已提交
375 376 377 378 379 380 381 382

# 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

383 384
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
385 386 387 388 389

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

# Basic helpers built in scripts/
390
PHONY += scripts_basic
L
Linus Torvalds 已提交
391 392
scripts_basic:
	$(Q)$(MAKE) $(build)=scripts/basic
393
	$(Q)rm -f .tmp_quiet_recordmcount
L
Linus Torvalds 已提交
394

395 396 397
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;

398
PHONY += outputmakefile
399 400 401
# 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
402
outputmakefile:
403
ifneq ($(KBUILD_SRC),)
404
	$(Q)ln -fsn $(srctree) source
405 406 407
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif
L
Linus Torvalds 已提交
408 409 410 411 412

# 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
413
# For example 'make oldconfig all'.
L
Linus Torvalds 已提交
414 415 416
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).

417
no-dot-config-targets := clean mrproper distclean \
418
			 cscope TAGS tags help %docs check% \
419
			 include/linux/version.h headers_% \
420
			 kernelversion
L
Linus Torvalds 已提交
421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457

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'
458
include $(srctree)/arch/$(SRCARCH)/Makefile
A
Al Viro 已提交
459
export KBUILD_DEFCONFIG KBUILD_KCONFIG
L
Linus Torvalds 已提交
460

S
Sam Ravnborg 已提交
461 462 463 464 465
config: scripts_basic outputmakefile FORCE
	$(Q)mkdir -p include/linux include/config
	$(Q)$(MAKE) $(build)=scripts/kconfig $@

%config: scripts_basic outputmakefile FORCE
R
Roman Zippel 已提交
466
	$(Q)mkdir -p include/linux include/config
L
Linus Torvalds 已提交
467 468 469 470 471 472 473 474 475 476
	$(Q)$(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
477
# in parallel
478
PHONY += scripts
M
Michal Marek 已提交
479
scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
L
Linus Torvalds 已提交
480 481 482 483
	$(Q)$(MAKE) $(build)=$(@)

# Objects we will link into vmlinux / subdirs we need to visit
init-y		:= init/
484
drivers-y	:= drivers/ sound/ firmware/
L
Linus Torvalds 已提交
485 486 487 488 489 490
net-y		:= net/
libs-y		:= lib/
core-y		:= usr/
endif # KBUILD_EXTMOD

ifeq ($(dot-config),1)
491 492
# Read in config
-include include/config/auto.conf
L
Linus Torvalds 已提交
493

494
ifeq ($(KBUILD_EXTMOD),)
L
Linus Torvalds 已提交
495 496
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
R
Roman Zippel 已提交
497
-include include/config/auto.conf.cmd
L
Linus Torvalds 已提交
498 499

# To avoid any implicit rule to kick in, define an empty command
R
Roman Zippel 已提交
500
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
L
Linus Torvalds 已提交
501

R
Roman Zippel 已提交
502
# If .config is newer than include/config/auto.conf, someone tinkered
503
# with it and forgot to run make oldconfig.
S
Sam Ravnborg 已提交
504
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
505
# we execute the config step to be sure to catch updated Kconfig files
M
Michal Marek 已提交
506
include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
L
Linus Torvalds 已提交
507
	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
508
else
509
# external modules needs include/generated/autoconf.h and include/config/auto.conf
510 511 512 513
# 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:
514
	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
515 516
	echo;								\
	echo "  ERROR: Kernel configuration is invalid.";		\
517
	echo "         include/generated/autoconf.h or $@ are missing.";\
518 519 520 521 522
	echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
	echo;								\
	/bin/false)

endif # KBUILD_EXTMOD
R
Roman Zippel 已提交
523

L
Linus Torvalds 已提交
524 525
else
# Dummy target needed, because used as prerequisite
R
Roman Zippel 已提交
526
include/config/auto.conf: ;
527
endif # $(dot-config)
L
Linus Torvalds 已提交
528 529 530 531

# 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
532
# Defaults vmlinux but it is usually overridden in the arch makefile
L
Linus Torvalds 已提交
533 534 535
all: vmlinux

ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
536
KBUILD_CFLAGS	+= -Os
L
Linus Torvalds 已提交
537
else
538
KBUILD_CFLAGS	+= -O2
L
Linus Torvalds 已提交
539 540
endif

R
Ralf Baechle 已提交
541 542
include $(srctree)/arch/$(SRCARCH)/Makefile

543
ifneq ($(CONFIG_FRAME_WARN),0)
544 545 546
KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
endif

547
# Force gcc to behave correct even for buggy distributions
T
Tejun Heo 已提交
548
ifndef CONFIG_CC_STACKPROTECTOR
549
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
T
Tejun Heo 已提交
550
endif
551

L
Linus Torvalds 已提交
552
ifdef CONFIG_FRAME_POINTER
553
KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
L
Linus Torvalds 已提交
554
else
555
KBUILD_CFLAGS	+= -fomit-frame-pointer
L
Linus Torvalds 已提交
556 557 558
endif

ifdef CONFIG_DEBUG_INFO
559
KBUILD_CFLAGS	+= -g
560
KBUILD_AFLAGS	+= -gdwarf-2
L
Linus Torvalds 已提交
561 562
endif

563 564 565 566
ifdef CONFIG_DEBUG_INFO_REDUCED
KBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly)
endif

567
ifdef CONFIG_FUNCTION_TRACER
568 569 570
KBUILD_CFLAGS	+= -pg
endif

571 572 573 574 575
# We trigger additional mismatches with less inlining
ifdef CONFIG_DEBUG_SECTION_MISMATCH
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
endif

576
# arch Makefile may override CC so keep this after arch Makefile is included
577
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
578 579
CHECKFLAGS     += $(NOSTDINC_FLAGS)

L
Linus Torvalds 已提交
580
# warn about C99 declaration after statement
581
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
L
Linus Torvalds 已提交
582

S
Sam Ravnborg 已提交
583
# disable pointer signed / unsigned warnings in gcc 4.0
584
KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
L
Linus Torvalds 已提交
585

586
# disable invalid "can't wrap" optimizations for signed / pointers
587
KBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
588

589 590 591
# conserve stack if available
KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)

592
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608
# But warn user when we do so
warn-assign = \
$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")

ifneq ($(KCPPFLAGS),)
        $(call warn-assign,CPPFLAGS)
        KBUILD_CPPFLAGS += $(KCPPFLAGS)
endif
ifneq ($(KAFLAGS),)
        $(call warn-assign,AFLAGS)
        KBUILD_AFLAGS += $(KAFLAGS)
endif
ifneq ($(KCFLAGS),)
        $(call warn-assign,CFLAGS)
        KBUILD_CFLAGS += $(KCFLAGS)
endif
609

R
Roland McGrath 已提交
610 611
# Use --build-id when available.
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
612
			      $(call cc-ldoption, -Wl$(comma)--build-id,))
613
KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
R
Roland McGrath 已提交
614 615
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)

616
ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
617
LDFLAGS_vmlinux	+= $(call ld-option, -X,)
618 619
endif

L
Linus Torvalds 已提交
620
# Default kernel image to build when no specific target is given.
S
Sam Ravnborg 已提交
621
# KBUILD_IMAGE may be overruled on the command line or
L
Linus Torvalds 已提交
622 623 624 625 626 627 628 629 630 631 632 633 634
# 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
635
# makefile but the argument can be passed to make if needed.
L
Linus Torvalds 已提交
636 637
#

638
MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
L
Linus Torvalds 已提交
639 640
export MODLIB

641
#
642 643 644 645 646
#  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.

647 648
ifdef INSTALL_MOD_STRIP
ifeq ($(INSTALL_MOD_STRIP),1)
649
mod_strip_cmd = $(STRIP) --strip-debug
650
else
651
mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
652 653
endif # INSTALL_MOD_STRIP=1
else
654
mod_strip_cmd = true
655 656 657
endif # INSTALL_MOD_STRIP
export mod_strip_cmd

L
Linus Torvalds 已提交
658 659

ifeq ($(KBUILD_EXTMOD),)
660
core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
L
Linus Torvalds 已提交
661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680

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
681
# vmlinux is built from the objects selected by $(vmlinux-init) and
L
Linus Torvalds 已提交
682
# $(vmlinux-main). Most are built-in.o files from top-level directories
683
# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
L
Linus Torvalds 已提交
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708
# 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) $(vmlinux-main)
709
vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
710
export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
L
Linus Torvalds 已提交
711 712 713 714 715 716 717

# 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                  \
718
      $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
L
Linus Torvalds 已提交
719 720 721 722

# Generate new vmlinux version
quiet_cmd_vmlinux_version = GEN     .version
      cmd_vmlinux_version = set -e;                     \
723 724 725 726 727 728 729
	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
730 731 732
	$(MAKE) $(build)=init

# Generate System.map
S
Sam Ravnborg 已提交
733
quiet_cmd_sysmap = SYSMAP
L
Linus Torvalds 已提交
734 735 736 737 738
      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
739 740
# 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
741
define rule_vmlinux__
742
	:
L
Linus Torvalds 已提交
743 744 745 746 747
	$(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))

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

748 749 750 751 752 753
	$(Q)$(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
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785
	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
786 787
	$(Q)$(if $($(quiet)cmd_sysmap),                                      \
	  echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
L
Linus Torvalds 已提交
788
	  $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
789 790 791
	$(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
792 793 794 795 796
		 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
797
# First command is ':' to allow us to use + in front of this rule
L
Linus Torvalds 已提交
798 799
cmd_ksym_ld = $(cmd_vmlinux__)
define rule_ksym_ld
S
Sam Ravnborg 已提交
800
	: 
L
Linus Torvalds 已提交
801 802 803 804 805 806 807
	+$(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    $@
808 809
      cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
                     $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
810

811
.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
L
Linus Torvalds 已提交
812 813
	$(call if_changed_dep,as_o_S)

814
.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
L
Linus Torvalds 已提交
815 816 817
	$(call cmd,kallsyms)

# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
818 819
.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
	$(call if_changed_rule,ksym_ld)
L
Linus Torvalds 已提交
820

821 822
.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
	$(call if_changed,vmlinux__)
L
Linus Torvalds 已提交
823

824 825
.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
	$(call if_changed,vmlinux__)
L
Linus Torvalds 已提交
826 827 828 829

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

S
Sam Ravnborg 已提交
830 831 832 833 834 835 836 837 838 839
# 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
840 841
endif # ifdef CONFIG_KALLSYMS

842 843 844 845 846
# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
# relevant sections renamed as per the linker script.
quiet_cmd_vmlinux-modpost = LD      $@
      cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
	 $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
S
Sam Ravnborg 已提交
847
	 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
848 849 850 851 852 853 854
define rule_vmlinux-modpost
	:
	+$(call cmd,vmlinux-modpost)
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
	$(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
endef

L
Linus Torvalds 已提交
855
# vmlinux image - including updated kernel symbols
856
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
857
ifdef CONFIG_HEADERS_CHECK
858
	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
M
Mathieu Desnoyers 已提交
859 860 861
endif
ifdef CONFIG_SAMPLES
	$(Q)$(MAKE) $(build)=samples
862 863 864
endif
ifdef CONFIG_BUILD_DOCSRC
	$(Q)$(MAKE) $(build)=Documentation
865
endif
866
	$(call vmlinux-modpost)
L
Linus Torvalds 已提交
867
	$(call if_changed_rule,vmlinux__)
868
	$(Q)rm -f .old_version
L
Linus Torvalds 已提交
869

870
# build vmlinux.o first to catch section mismatch errors early
S
Sam Ravnborg 已提交
871 872 873
ifdef CONFIG_KALLSYMS
.tmp_vmlinux1: vmlinux.o
endif
S
Sam Ravnborg 已提交
874 875 876

modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
877 878
	$(call if_changed_rule,vmlinux-modpost)

L
Linus Torvalds 已提交
879 880 881 882 883 884 885 886 887 888
# 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

889
PHONY += $(vmlinux-dirs)
890
$(vmlinux-dirs): prepare scripts
L
Linus Torvalds 已提交
891 892
	$(Q)$(MAKE) $(build)=$@

R
Roman Zippel 已提交
893
# Store (new) KERNELRELASE string in include/config/kernel.release
894 895
localversion = $(shell $(CONFIG_SHELL) \
	       $(srctree)/scripts/setlocalversion $(srctree))
R
Roman Zippel 已提交
896
include/config/kernel.release: include/config/auto.conf FORCE
897
	$(Q)rm -f $@
898
	$(Q)echo $(KERNELVERSION)$(localversion) > $@
899 900


L
Linus Torvalds 已提交
901
# Things we need to do before we recursively start building the kernel
902 903 904 905
# 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
906

907
# Listed in dependency order
908
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
909

910
# prepare3 is used to check if we are building in a separate output directory,
L
Linus Torvalds 已提交
911 912
# and if so do:
# 1) Check that make has not been executed in the kernel src $(srctree)
R
Roman Zippel 已提交
913
prepare3: include/config/kernel.release
L
Linus Torvalds 已提交
914
ifneq ($(KBUILD_SRC),)
915
	@$(kecho) '  Using $(srctree) as source for kernel'
R
Roman Zippel 已提交
916
	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
L
Linus Torvalds 已提交
917 918 919 920 921 922
		echo "  $(srctree) is not clean, please run 'make mrproper'";\
		echo "  in the '$(srctree)' directory.";\
		/bin/false; \
	fi;
endif

923 924
# prepare2 creates a makefile if using a separate output directory
prepare2: prepare3 outputmakefile
L
Linus Torvalds 已提交
925

926
prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
S
Sam Ravnborg 已提交
927
                   include/config/auto.conf
S
Sam Ravnborg 已提交
928
	$(cmd_crmodverdir)
L
Linus Torvalds 已提交
929

930 931 932
archprepare: prepare1 scripts_basic

prepare0: archprepare FORCE
933
	$(Q)$(MAKE) $(build)=.
934
	$(Q)$(MAKE) $(build)=. missing-syscalls
935

L
Linus Torvalds 已提交
936
# All the preparing..
937
prepare: prepare0
L
Linus Torvalds 已提交
938 939 940 941 942 943 944 945

# 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
946 947 948 949 950 951 952
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
953 954

define filechk_version.h
S
Sam Ravnborg 已提交
955 956 957
	(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
958 959
endef

S
Sam Ravnborg 已提交
960
include/linux/version.h: $(srctree)/Makefile FORCE
L
Linus Torvalds 已提交
961 962
	$(call filechk,version.h)

963
include/generated/utsrelease.h: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
964 965
	$(call filechk,utsrelease.h)

966 967 968 969
PHONY += headerdep
headerdep:
	$(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl

L
Linus Torvalds 已提交
970 971
# ---------------------------------------------------------------------------

972
PHONY += depend dep
L
Linus Torvalds 已提交
973 974 975
depend dep:
	@echo '*** Warning: make $@ is unnecessary now.'

976 977 978 979 980 981 982 983 984 985
# ---------------------------------------------------------------------------
# Firmware install
INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
export INSTALL_FW_PATH

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

986 987 988
# ---------------------------------------------------------------------------
# Kernel headers

989 990
#Default location for installed headers
export INSTALL_HDR_PATH = $(objtree)/usr
991

992
hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
993 994 995

# If we do an all arch process set dst to asm-$(hdr-arch)
hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
996 997 998

PHONY += __headers
__headers: include/linux/version.h scripts_basic FORCE
999
	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1000 1001

PHONY += headers_install_all
1002 1003
headers_install_all:
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1004

1005
PHONY += headers_install
1006
headers_install: __headers
1007
	$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
1008
	$(error Headers not exportable for the $(SRCARCH) architecture))
1009
	$(Q)$(MAKE) $(hdr-inst)=include
1010
	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
1011

1012 1013
PHONY += headers_check_all
headers_check_all: headers_install_all
1014
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1015

1016 1017
PHONY += headers_check
headers_check: headers_install
1018
	$(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1019
	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
1020

L
Linus Torvalds 已提交
1021 1022 1023 1024 1025
# ---------------------------------------------------------------------------
# Modules

ifdef CONFIG_MODULES

S
Sam Ravnborg 已提交
1026
# By default, build modules as well
L
Linus Torvalds 已提交
1027

1028
all: modules
L
Linus Torvalds 已提交
1029 1030

#	Build modules
T
Tejun Heo 已提交
1031 1032 1033 1034
#
#	A module can be listed more than once in obj-m resulting in
#	duplicate lines in modules.order files.  Those are removed
#	using awk while concatenating to the final file.
L
Linus Torvalds 已提交
1035

1036
PHONY += modules
L
Linus Torvalds 已提交
1037
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
T
Tejun Heo 已提交
1038
	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1039
	@$(kecho) '  Building modules, stage 2.';
S
Sam Ravnborg 已提交
1040
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1041
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
L
Linus Torvalds 已提交
1042

1043 1044 1045
modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin

1046
%/modules.builtin: include/config/auto.conf
1047 1048
	$(Q)$(MAKE) $(modbuiltin)=$*

L
Linus Torvalds 已提交
1049 1050

# Target to prepare building external modules
1051
PHONY += modules_prepare
1052
modules_prepare: prepare scripts
L
Linus Torvalds 已提交
1053 1054

# Target to install modules
1055
PHONY += modules_install
L
Linus Torvalds 已提交
1056 1057
modules_install: _modinst_ _modinst_post

1058
PHONY += _modinst_
1059
_modinst_: modules.builtin
1060
	@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
L
Linus Torvalds 已提交
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072
		echo "Warning: you may need to install module-init-tools"; \
		echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
		sleep 1; \
	fi
	@rm -rf $(MODLIB)/kernel
	@rm -f $(MODLIB)/source
	@mkdir -p $(MODLIB)/kernel
	@ln -s $(srctree) $(MODLIB)/source
	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
		rm -f $(MODLIB)/build ; \
		ln -s $(objtree) $(MODLIB)/build ; \
	fi
T
Tejun Heo 已提交
1073
	@cp -f $(objtree)/modules.order $(MODLIB)/
M
Michal Marek 已提交
1074
	@cp -f $(objtree)/modules.builtin $(MODLIB)/
S
Sam Ravnborg 已提交
1075
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
L
Linus Torvalds 已提交
1076

1077
# This depmod is only for convenience to give the initial
L
Linus Torvalds 已提交
1078 1079
# boot a modules.dep even before / is mounted read-write.  However the
# boot script depmod is the master version.
1080
PHONY += _modinst_post
L
Linus Torvalds 已提交
1081
_modinst_post: _modinst_
1082
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1083
	$(call cmd,depmod)
L
Linus Torvalds 已提交
1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112

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'
1113
MRPROPER_DIRS  += include/config usr/include include/generated
S
Sam Ravnborg 已提交
1114
MRPROPER_FILES += .config .config.old .version .old_version             \
1115
                  include/linux/version.h                               \
W
Wenji Huang 已提交
1116
		  Module.symvers tags TAGS cscope*
L
Linus Torvalds 已提交
1117 1118 1119 1120 1121

# clean - Delete most, but leave enough to build external modules
#
clean: rm-dirs  := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
1122
clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
L
Linus Torvalds 已提交
1123

1124
PHONY += $(clean-dirs) clean archclean
L
Linus Torvalds 已提交
1125 1126 1127 1128 1129 1130 1131
$(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
1132
		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1133
		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1134
		-o -name '*.symtypes' -o -name 'modules.order' \
1135
		-o -name modules.builtin -o -name '.tmp_*.o.*' \
1136
		-o -name '*.gcno' \) -type f -print | xargs rm -f
L
Linus Torvalds 已提交
1137 1138 1139 1140 1141 1142 1143

# 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)

1144
PHONY += $(mrproper-dirs) mrproper archmrproper
L
Linus Torvalds 已提交
1145 1146 1147 1148 1149 1150 1151 1152 1153
$(mrproper-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)

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

# distclean
#
1154
PHONY += distclean
L
Linus Torvalds 已提交
1155 1156 1157

distclean: mrproper
	@find $(srctree) $(RCS_FIND_IGNORE) \
S
Sam Ravnborg 已提交
1158
		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
L
Linus Torvalds 已提交
1159
		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
S
Sam Ravnborg 已提交
1160
		-o -name '.*.rej' -o -size 0 \
L
Linus Torvalds 已提交
1161 1162 1163 1164 1165 1166 1167 1168 1169
		-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
		-type f -print | xargs rm -f


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

1170
%pkg: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
1171
	$(Q)$(MAKE) $(build)=$(package-dir) $@
1172
rpm: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
1173
	$(Q)$(MAKE) $(build)=$(package-dir) $@
L
Linus Torvalds 已提交
1174 1175 1176 1177 1178


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

1179
boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
L
Linus Torvalds 已提交
1180
boards := $(notdir $(boards))
1181 1182
board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
board-dirs := $(sort $(notdir $(board-dirs:/=)))
L
Linus Torvalds 已提交
1183 1184 1185

help:
	@echo  'Cleaning targets:'
1186
	@echo  '  clean		  - Remove most generated files but keep the config and'
1187
	@echo  '                    enough build support to build external modules'
1188
	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1189
	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
L
Linus Torvalds 已提交
1190 1191 1192 1193 1194 1195 1196 1197
	@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'
1198
	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1199 1200
	@echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
	@echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
L
Linus Torvalds 已提交
1201
	@echo  '  dir/            - Build all files in dir and below'
1202 1203 1204
	@echo  '  dir/file.[oisS] - Build specified target only'
	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
	@echo  '                    (requires a recent binutils and recent build (System.map))'
1205
	@echo  '  dir/file.ko     - Build module including final link'
1206
	@echo  '  modules_prepare - Set up for building external modules'
L
Linus Torvalds 已提交
1207 1208
	@echo  '  tags/TAGS	  - Generate tags file for editors'
	@echo  '  cscope	  - Generate cscope index'
1209
	@echo  '  kernelrelease	  - Output the release version string'
1210
	@echo  '  kernelversion	  - Output the version stored in Makefile'
1211
	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1212
	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1213
	 echo  ''
L
Linus Torvalds 已提交
1214 1215 1216
	@echo  'Static analysers'
	@echo  '  checkstack      - Generate a list of stack hogs'
	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1217
	@echo  '  versioncheck    - Sanity check on version.h usage'
1218
	@echo  '  includecheck    - Check for duplicate included header files'
1219
	@echo  '  export_report   - List the usages of all exported symbols'
1220 1221
	@echo  '  headers_check   - Sanity check on exported headers'
	@echo  '  headerdep       - Detect inclusion cycles in headers'; \
1222
	 echo  ''
L
Linus Torvalds 已提交
1223
	@echo  'Kernel packaging:'
S
Sam Ravnborg 已提交
1224
	@$(MAKE) $(build)=$(package-dir) help
L
Linus Torvalds 已提交
1225 1226 1227 1228
	@echo  ''
	@echo  'Documentation targets:'
	@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
	@echo  ''
1229
	@echo  'Architecture specific targets ($(SRCARCH)):'
L
Linus Torvalds 已提交
1230
	@$(if $(archhelp),$(archhelp),\
1231
		echo '  No architecture specific help defined for $(SRCARCH)')
L
Linus Torvalds 已提交
1232 1233 1234 1235 1236
	@echo  ''
	@$(if $(boards), \
		$(foreach b, $(boards), \
		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
		echo '')
1237 1238 1239 1240 1241
	@$(if $(board-dirs), \
		$(foreach b, $(board-dirs), \
		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
		printf "  %-16s - Show all of the above\\n" help-boards; \
		echo '')
L
Linus Torvalds 已提交
1242 1243

	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1244
	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
L
Linus Torvalds 已提交
1245
	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1246 1247
	@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
1248 1249 1250 1251 1252
	@echo  ''
	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
	@echo  'For further info see the ./README file'


1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266
help-board-dirs := $(addprefix help-,$(board-dirs))

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

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

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


L
Linus Torvalds 已提交
1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
# 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
1288
#                      Install the modules built in the module directory
L
Linus Torvalds 已提交
1289 1290 1291 1292
#                      Assumes install directory is already created

# We are always building modules
KBUILD_MODULES := 1
1293
PHONY += crmodverdir
L
Linus Torvalds 已提交
1294
crmodverdir:
S
Sam Ravnborg 已提交
1295
	$(cmd_crmodverdir)
L
Linus Torvalds 已提交
1296

1297
PHONY += $(objtree)/Module.symvers
L
Linus Torvalds 已提交
1298 1299 1300 1301 1302 1303 1304 1305
$(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))
1306
PHONY += $(module-dirs) modules
L
Linus Torvalds 已提交
1307 1308 1309 1310
$(module-dirs): crmodverdir $(objtree)/Module.symvers
	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)

modules: $(module-dirs)
1311
	@$(kecho) '  Building modules, stage 2.';
S
Sam Ravnborg 已提交
1312
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
L
Linus Torvalds 已提交
1313

1314
PHONY += modules_install
1315
modules_install: _emodinst_ _emodinst_post
1316

1317 1318
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
PHONY += _emodinst_
1319 1320
_emodinst_:
	$(Q)mkdir -p $(MODLIB)/$(install-dir)
S
Sam Ravnborg 已提交
1321
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
L
Linus Torvalds 已提交
1322

1323
PHONY += _emodinst_post
1324 1325 1326
_emodinst_post: _emodinst_
	$(call cmd,depmod)

L
Linus Torvalds 已提交
1327 1328
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))

1329
PHONY += $(clean-dirs) clean
L
Linus Torvalds 已提交
1330 1331 1332 1333
$(clean-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)

clean:	rm-dirs := $(MODVERDIR)
1334
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
M
Michal Marek 已提交
1335 1336
                   $(KBUILD_EXTMOD)/modules.order \
                   $(KBUILD_EXTMOD)/modules.builtin
L
Linus Torvalds 已提交
1337 1338
clean: $(clean-dirs)
	$(call cmd,rmdirs)
1339
	$(call cmd,rmfiles)
L
Linus Torvalds 已提交
1340
	@find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
S
Sam Ravnborg 已提交
1341
		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1342 1343
		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
		-o -name '*.gcno' \) -type f -print | xargs rm -f
L
Linus Torvalds 已提交
1344 1345 1346 1347 1348 1349 1350 1351 1352

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  ''
1353 1354

# Dummies...
1355
PHONY += prepare scripts
1356 1357
prepare: ;
scripts: ;
L
Linus Torvalds 已提交
1358 1359 1360 1361
endif # KBUILD_EXTMOD

# Generate tags for editors
# ---------------------------------------------------------------------------
1362 1363
quiet_cmd_tags = GEN     $@
      cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
L
Linus Torvalds 已提交
1364

1365
tags TAGS cscope: FORCE
L
Linus Torvalds 已提交
1366 1367 1368 1369 1370 1371 1372 1373
	$(call cmd,tags)

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

includecheck:
	find * $(RCS_FIND_IGNORE) \
		-name '*.[hcS]' -type f -print | sort \
1374
		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
L
Linus Torvalds 已提交
1375 1376 1377 1378

versioncheck:
	find * $(RCS_FIND_IGNORE) \
		-name '*.[hcS]' -type f -print | sort \
1379
		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
L
Linus Torvalds 已提交
1380 1381 1382 1383

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

1384 1385 1386
export_report:
	$(PERL) $(srctree)/scripts/export_report.pl

L
Linus Torvalds 已提交
1387 1388 1389
endif #ifeq ($(config-targets),1)
endif #ifeq ($(mixed-targets),1)

1390
PHONY += checkstack kernelrelease kernelversion
J
Jeff Dike 已提交
1391

J
Jeff Dike 已提交
1392 1393 1394 1395 1396 1397 1398 1399 1400
# UML needs a little special treatment here.  It wants to use the host
# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
# else wants $(ARCH), including people doing cross-builds, which means
# that $(SUBARCH) doesn't work here.
ifeq ($(ARCH), um)
CHECKSTACK_ARCH := $(SUBARCH)
else
CHECKSTACK_ARCH := $(ARCH)
endif
L
Linus Torvalds 已提交
1401 1402
checkstack:
	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
J
Jeff Dike 已提交
1403
	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
L
Linus Torvalds 已提交
1404

1405 1406 1407
kernelrelease: include/config/kernel.release
	@echo $(KERNELRELEASE)

1408
kernelversion:
1409
	@echo $(KERNELVERSION)
L
Linus Torvalds 已提交
1410

1411 1412
# Single targets
# ---------------------------------------------------------------------------
1413
# Single targets are compatible with:
R
Robert P. J. Day 已提交
1414
# - build with mixed source and output
1415 1416 1417 1418 1419 1420 1421
# - 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
1422
        build-dir  = $(patsubst %/,%,$(dir $@))
1423 1424 1425 1426 1427 1428 1429
        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

1430
%.s: %.c prepare scripts FORCE
1431
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1432
%.i: %.c prepare scripts FORCE
1433
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1434
%.o: %.c prepare scripts FORCE
1435
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1436
%.lst: %.c prepare scripts FORCE
1437
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1438
%.s: %.S prepare scripts FORCE
1439
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1440
%.o: %.S prepare scripts FORCE
1441
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1442 1443
%.symtypes: %.c prepare scripts FORCE
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1444

1445
# Modules
S
Sam Ravnborg 已提交
1446 1447 1448 1449 1450
/: prepare scripts FORCE
	$(cmd_crmodverdir)
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
	$(build)=$(build-dir)
%/: prepare scripts FORCE
S
Sam Ravnborg 已提交
1451
	$(cmd_crmodverdir)
1452
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1453 1454
	$(build)=$(build-dir)
%.ko: prepare scripts FORCE
S
Sam Ravnborg 已提交
1455
	$(cmd_crmodverdir)
1456
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1457
	$(build)=$(build-dir) $(@:.ko=.o)
S
Sam Ravnborg 已提交
1458
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1459

L
Linus Torvalds 已提交
1460 1461 1462 1463 1464 1465 1466 1467 1468
# 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)

1469
# Run depmod only if we have System.map and depmod is executable
1470 1471
quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
      cmd_depmod = \
1472
	if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1473
		$(DEPMOD) -ae -F System.map                                     \
1474
		$(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) )     \
1475 1476 1477
		$(KERNELRELEASE);                                               \
	fi

S
Sam Ravnborg 已提交
1478
# Create temporary dir for module support files
1479 1480 1481
# clean it up only when building all modules
cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
L
Linus Torvalds 已提交
1482

1483
a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1484
	  $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1485
	  $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
L
Linus Torvalds 已提交
1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506

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

1507
PHONY += FORCE
L
Linus Torvalds 已提交
1508
FORCE:
1509 1510

# Declare the contents of the .PHONY variable as phony.  We keep that
1511
# information in a variable so we can use it in if_changed and friends.
1512
.PHONY: $(PHONY)