Makefile 50.5 KB
Newer Older
L
Linus Torvalds 已提交
1 2
VERSION = 2
PATCHLEVEL = 6
L
Linus Torvalds 已提交
3
SUBLEVEL = 36
L
Linus Torvalds 已提交
4
EXTRAVERSION = -rc6
L
Linus Torvalds 已提交
5
NAME = Sheep on Meth
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
ARCH		?= $(SUBARCH)
R
Roland McGrath 已提交
192
CROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
L
Linus Torvalds 已提交
193 194

# Architecture as present in compile.h
195 196
UTS_MACHINE 	:= $(ARCH)
SRCARCH 	:= $(ARCH)
L
Linus Torvalds 已提交
197

198 199 200 201 202 203 204
# Additional ARCH settings for x86
ifeq ($(ARCH),i386)
        SRCARCH := x86
endif
ifeq ($(ARCH),x86_64)
        SRCARCH := x86
endif
205

S
Sam Ravnborg 已提交
206
# Additional ARCH settings for sparc
207
ifeq ($(ARCH),sparc64)
S
Sam Ravnborg 已提交
208
       SRCARCH := sparc
209
endif
210

211 212 213 214 215
# Additional ARCH settings for sh
ifeq ($(ARCH),sh64)
       SRCARCH := sh
endif

S
Sam Ravnborg 已提交
216 217 218
# Where to locate arch specific headers
hdr-arch  := $(SRCARCH)

219 220 221 222
ifeq ($(ARCH),m68knommu)
       hdr-arch  := m68k
endif

R
Roman Zippel 已提交
223 224
KCONFIG_CONFIG	?= .config

L
Linus Torvalds 已提交
225 226 227 228 229
# 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
230 231
HOSTCC       = gcc
HOSTCXX      = g++
232
HOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
S
Sam Ravnborg 已提交
233
HOSTCXXFLAGS = -O2
L
Linus Torvalds 已提交
234

S
Sam Ravnborg 已提交
235 236
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
L
Linus Torvalds 已提交
237 238 239 240 241 242 243

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
244
#	make sure the checksums are up to date before we record them.
L
Linus Torvalds 已提交
245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261

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

262
export KBUILD_MODULES KBUILD_BUILTIN
L
Linus Torvalds 已提交
263 264 265 266 267 268 269 270 271 272 273 274 275 276
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
277
# If it is set to "silent_", nothing will be printed at all, since
L
Linus Torvalds 已提交
278 279
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
A
Adrian Bunk 已提交
280
# A simple variant is to prefix commands with $(Q) - that's useful
L
Linus Torvalds 已提交
281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
# 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)

309 310
# We need some generic definitions (do not try to remake the file).
$(srctree)/scripts/Kbuild.include: ;
311
include $(srctree)/scripts/Kbuild.include
L
Linus Torvalds 已提交
312 313 314 315 316 317 318 319 320 321 322 323 324 325

# 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
326
INSTALLKERNEL  := installkernel
L
Linus Torvalds 已提交
327 328 329 330 331
DEPMOD		= /sbin/depmod
KALLSYMS	= scripts/kallsyms
PERL		= perl
CHECK		= sparse

332 333
CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
		  -Wbitwise -Wno-return-void $(CF)
334 335 336
CFLAGS_MODULE   =
AFLAGS_MODULE   =
LDFLAGS_MODULE  =
L
Linus Torvalds 已提交
337 338
CFLAGS_KERNEL	=
AFLAGS_KERNEL	=
339
CFLAGS_GCOV	= -fprofile-arcs -ftest-coverage
L
Linus Torvalds 已提交
340 341 342 343


# Use LINUXINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
344
LINUXINCLUDE    := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
345
                   $(if $(KBUILD_SRC), -I$(srctree)/include) \
346
                   -include include/generated/autoconf.h
L
Linus Torvalds 已提交
347

348
KBUILD_CPPFLAGS := -D__KERNEL__
L
Linus Torvalds 已提交
349

350
KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
351
		   -fno-strict-aliasing -fno-common \
352
		   -Werror-implicit-function-declaration \
353 354
		   -Wno-format-security \
		   -fno-delete-null-pointer-checks
355 356
KBUILD_AFLAGS_KERNEL :=
KBUILD_CFLAGS_KERNEL :=
357
KBUILD_AFLAGS   := -D__ASSEMBLY__
358 359 360
KBUILD_AFLAGS_MODULE  := -DMODULE
KBUILD_CFLAGS_MODULE  := -DMODULE
KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
L
Linus Torvalds 已提交
361

R
Roman Zippel 已提交
362 363
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
364
KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
365

S
Sam Ravnborg 已提交
366
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
367
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
368 369
export CPP AR NM STRIP OBJCOPY OBJDUMP
export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
S
Sam Ravnborg 已提交
370
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
L
Linus Torvalds 已提交
371

372
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
373
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
374
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
375
export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
376
export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
L
Linus Torvalds 已提交
377 378 379 380 381 382 383 384

# 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

385 386
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
387 388 389 390 391

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

# Basic helpers built in scripts/
392
PHONY += scripts_basic
L
Linus Torvalds 已提交
393 394
scripts_basic:
	$(Q)$(MAKE) $(build)=scripts/basic
395
	$(Q)rm -f .tmp_quiet_recordmcount
L
Linus Torvalds 已提交
396

397 398 399
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;

400
PHONY += outputmakefile
401 402 403
# 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
404
outputmakefile:
405
ifneq ($(KBUILD_SRC),)
406
	$(Q)ln -fsn $(srctree) source
407 408 409
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif
L
Linus Torvalds 已提交
410 411 412 413 414

# 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
415
# For example 'make oldconfig all'.
L
Linus Torvalds 已提交
416 417 418
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).

419
no-dot-config-targets := clean mrproper distclean \
420
			 cscope TAGS tags help %docs check% coccicheck \
421
			 include/linux/version.h headers_% \
422
			 kernelversion %src-pkg
L
Linus Torvalds 已提交
423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459

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'
460
include $(srctree)/arch/$(SRCARCH)/Makefile
A
Al Viro 已提交
461
export KBUILD_DEFCONFIG KBUILD_KCONFIG
L
Linus Torvalds 已提交
462

S
Sam Ravnborg 已提交
463 464 465 466 467
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
468
	$(Q)mkdir -p include/linux include/config
L
Linus Torvalds 已提交
469 470 471 472 473 474 475 476 477 478
	$(Q)$(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
479
# in parallel
480
PHONY += scripts
M
Michal Marek 已提交
481
scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
L
Linus Torvalds 已提交
482 483 484 485
	$(Q)$(MAKE) $(build)=$(@)

# Objects we will link into vmlinux / subdirs we need to visit
init-y		:= init/
486
drivers-y	:= drivers/ sound/ firmware/
L
Linus Torvalds 已提交
487 488 489 490 491 492
net-y		:= net/
libs-y		:= lib/
core-y		:= usr/
endif # KBUILD_EXTMOD

ifeq ($(dot-config),1)
493 494
# Read in config
-include include/config/auto.conf
L
Linus Torvalds 已提交
495

496
ifeq ($(KBUILD_EXTMOD),)
L
Linus Torvalds 已提交
497 498
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
R
Roman Zippel 已提交
499
-include include/config/auto.conf.cmd
L
Linus Torvalds 已提交
500 501

# To avoid any implicit rule to kick in, define an empty command
R
Roman Zippel 已提交
502
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
L
Linus Torvalds 已提交
503

R
Roman Zippel 已提交
504
# If .config is newer than include/config/auto.conf, someone tinkered
505
# with it and forgot to run make oldconfig.
S
Sam Ravnborg 已提交
506
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
507
# we execute the config step to be sure to catch updated Kconfig files
M
Michal Marek 已提交
508
include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
L
Linus Torvalds 已提交
509
	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
510
else
511
# external modules needs include/generated/autoconf.h and include/config/auto.conf
512 513 514 515
# 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:
516
	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
517 518
	echo;								\
	echo "  ERROR: Kernel configuration is invalid.";		\
519
	echo "         include/generated/autoconf.h or $@ are missing.";\
520 521 522 523 524
	echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
	echo;								\
	/bin/false)

endif # KBUILD_EXTMOD
R
Roman Zippel 已提交
525

L
Linus Torvalds 已提交
526 527
else
# Dummy target needed, because used as prerequisite
R
Roman Zippel 已提交
528
include/config/auto.conf: ;
529
endif # $(dot-config)
L
Linus Torvalds 已提交
530 531 532 533

# 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
M
Michal Marek 已提交
534
# Defaults to vmlinux, but the arch makefile usually adds further targets
L
Linus Torvalds 已提交
535 536 537
all: vmlinux

ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
538
KBUILD_CFLAGS	+= -Os
L
Linus Torvalds 已提交
539
else
540
KBUILD_CFLAGS	+= -O2
L
Linus Torvalds 已提交
541 542
endif

R
Ralf Baechle 已提交
543 544
include $(srctree)/arch/$(SRCARCH)/Makefile

545
ifneq ($(CONFIG_FRAME_WARN),0)
546 547 548
KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
endif

549
# Force gcc to behave correct even for buggy distributions
T
Tejun Heo 已提交
550
ifndef CONFIG_CC_STACKPROTECTOR
551
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
T
Tejun Heo 已提交
552
endif
553

L
Linus Torvalds 已提交
554
ifdef CONFIG_FRAME_POINTER
555
KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
L
Linus Torvalds 已提交
556
else
557
KBUILD_CFLAGS	+= -fomit-frame-pointer
L
Linus Torvalds 已提交
558 559 560
endif

ifdef CONFIG_DEBUG_INFO
561
KBUILD_CFLAGS	+= -g
562
KBUILD_AFLAGS	+= -gdwarf-2
L
Linus Torvalds 已提交
563 564
endif

565 566 567 568
ifdef CONFIG_DEBUG_INFO_REDUCED
KBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly)
endif

569
ifdef CONFIG_FUNCTION_TRACER
570 571 572
KBUILD_CFLAGS	+= -pg
endif

573 574 575 576 577
# We trigger additional mismatches with less inlining
ifdef CONFIG_DEBUG_SECTION_MISMATCH
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
endif

578
# arch Makefile may override CC so keep this after arch Makefile is included
579
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
580 581
CHECKFLAGS     += $(NOSTDINC_FLAGS)

L
Linus Torvalds 已提交
582
# warn about C99 declaration after statement
583
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
L
Linus Torvalds 已提交
584

S
Sam Ravnborg 已提交
585
# disable pointer signed / unsigned warnings in gcc 4.0
586
KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
L
Linus Torvalds 已提交
587

588
# disable invalid "can't wrap" optimizations for signed / pointers
589
KBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
590

591 592 593
# conserve stack if available
KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)

594
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610
# 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
611

R
Roland McGrath 已提交
612 613
# Use --build-id when available.
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
614
			      $(call cc-ldoption, -Wl$(comma)--build-id,))
615
KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
R
Roland McGrath 已提交
616 617
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)

618
ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
619
LDFLAGS_vmlinux	+= $(call ld-option, -X,)
620 621
endif

L
Linus Torvalds 已提交
622
# Default kernel image to build when no specific target is given.
S
Sam Ravnborg 已提交
623
# KBUILD_IMAGE may be overruled on the command line or
L
Linus Torvalds 已提交
624 625 626 627 628 629 630 631 632 633 634 635 636
# 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
637
# makefile but the argument can be passed to make if needed.
L
Linus Torvalds 已提交
638 639
#

640
MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
L
Linus Torvalds 已提交
641 642
export MODLIB

643
#
644 645 646 647 648
#  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.

649 650
ifdef INSTALL_MOD_STRIP
ifeq ($(INSTALL_MOD_STRIP),1)
651
mod_strip_cmd = $(STRIP) --strip-debug
652
else
653
mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
654 655
endif # INSTALL_MOD_STRIP=1
else
656
mod_strip_cmd = true
657 658 659
endif # INSTALL_MOD_STRIP
export mod_strip_cmd

L
Linus Torvalds 已提交
660 661

ifeq ($(KBUILD_EXTMOD),)
662
core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
L
Linus Torvalds 已提交
663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682

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
683
# vmlinux is built from the objects selected by $(vmlinux-init) and
L
Linus Torvalds 已提交
684
# $(vmlinux-main). Most are built-in.o files from top-level directories
685
# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
L
Linus Torvalds 已提交
686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710
# 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) $(vmlinux-main)
711
vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
712
export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
L
Linus Torvalds 已提交
713 714 715 716 717 718 719

# 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                  \
720
      $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
L
Linus Torvalds 已提交
721 722 723 724

# Generate new vmlinux version
quiet_cmd_vmlinux_version = GEN     .version
      cmd_vmlinux_version = set -e;                     \
725 726 727 728 729 730 731
	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
732 733 734
	$(MAKE) $(build)=init

# Generate System.map
S
Sam Ravnborg 已提交
735
quiet_cmd_sysmap = SYSMAP
L
Linus Torvalds 已提交
736 737 738 739 740
      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
741 742
# 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
743
define rule_vmlinux__
744
	:
L
Linus Torvalds 已提交
745 746 747 748 749
	$(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))

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

750 751 752 753 754 755
	$(Q)$(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
756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787
	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
788 789
	$(Q)$(if $($(quiet)cmd_sysmap),                                      \
	  echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
L
Linus Torvalds 已提交
790
	  $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
791 792 793
	$(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
794 795 796 797 798
		 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
799
# First command is ':' to allow us to use + in front of this rule
L
Linus Torvalds 已提交
800 801
cmd_ksym_ld = $(cmd_vmlinux__)
define rule_ksym_ld
S
Sam Ravnborg 已提交
802
	: 
L
Linus Torvalds 已提交
803 804 805 806 807 808 809
	+$(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    $@
810 811
      cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
                     $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
812

813
.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
L
Linus Torvalds 已提交
814 815
	$(call if_changed_dep,as_o_S)

816
.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
L
Linus Torvalds 已提交
817 818 819
	$(call cmd,kallsyms)

# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
820 821
.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
	$(call if_changed_rule,ksym_ld)
L
Linus Torvalds 已提交
822

823 824
.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
	$(call if_changed,vmlinux__)
L
Linus Torvalds 已提交
825

826 827
.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
	$(call if_changed,vmlinux__)
L
Linus Torvalds 已提交
828 829 830 831

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

S
Sam Ravnborg 已提交
832 833 834 835 836 837 838 839 840 841
# 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
842 843
endif # ifdef CONFIG_KALLSYMS

844 845 846 847 848
# 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
849
	 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
850 851 852 853 854 855 856
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
857
# vmlinux image - including updated kernel symbols
858
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
859
ifdef CONFIG_HEADERS_CHECK
860
	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
M
Mathieu Desnoyers 已提交
861 862 863
endif
ifdef CONFIG_SAMPLES
	$(Q)$(MAKE) $(build)=samples
864 865 866
endif
ifdef CONFIG_BUILD_DOCSRC
	$(Q)$(MAKE) $(build)=Documentation
867
endif
868
	$(call vmlinux-modpost)
L
Linus Torvalds 已提交
869
	$(call if_changed_rule,vmlinux__)
870
	$(Q)rm -f .old_version
L
Linus Torvalds 已提交
871

872
# build vmlinux.o first to catch section mismatch errors early
S
Sam Ravnborg 已提交
873 874 875
ifdef CONFIG_KALLSYMS
.tmp_vmlinux1: vmlinux.o
endif
S
Sam Ravnborg 已提交
876 877 878

modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
879 880
	$(call if_changed_rule,vmlinux-modpost)

L
Linus Torvalds 已提交
881 882 883 884 885 886 887 888 889 890
# 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

891
PHONY += $(vmlinux-dirs)
892
$(vmlinux-dirs): prepare scripts
L
Linus Torvalds 已提交
893 894
	$(Q)$(MAKE) $(build)=$@

R
Roman Zippel 已提交
895 896
# Store (new) KERNELRELASE string in include/config/kernel.release
include/config/kernel.release: include/config/auto.conf FORCE
897
	$(Q)rm -f $@
898
	$(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
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
1037
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
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_:
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 1171
%src-pkg: FORCE
	$(Q)$(MAKE) $(build)=$(package-dir) $@
1172
%pkg: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
1173
	$(Q)$(MAKE) $(build)=$(package-dir) $@
1174
rpm: include/config/kernel.release FORCE
S
Sam Ravnborg 已提交
1175
	$(Q)$(MAKE) $(build)=$(package-dir) $@
L
Linus Torvalds 已提交
1176 1177 1178 1179 1180


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

1181
boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
L
Linus Torvalds 已提交
1182
boards := $(notdir $(boards))
1183 1184
board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
board-dirs := $(sort $(notdir $(board-dirs:/=)))
L
Linus Torvalds 已提交
1185 1186 1187

help:
	@echo  'Cleaning targets:'
1188
	@echo  '  clean		  - Remove most generated files but keep the config and'
1189
	@echo  '                    enough build support to build external modules'
1190
	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1191
	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
L
Linus Torvalds 已提交
1192 1193 1194 1195 1196 1197 1198 1199
	@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'
1200
	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1201 1202
	@echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
	@echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
L
Linus Torvalds 已提交
1203
	@echo  '  dir/            - Build all files in dir and below'
1204 1205 1206
	@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))'
1207
	@echo  '  dir/file.ko     - Build module including final link'
1208
	@echo  '  modules_prepare - Set up for building external modules'
L
Linus Torvalds 已提交
1209 1210
	@echo  '  tags/TAGS	  - Generate tags file for editors'
	@echo  '  cscope	  - Generate cscope index'
1211
	@echo  '  kernelrelease	  - Output the release version string'
1212
	@echo  '  kernelversion	  - Output the version stored in Makefile'
1213
	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1214
	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1215
	 echo  ''
L
Linus Torvalds 已提交
1216 1217 1218
	@echo  'Static analysers'
	@echo  '  checkstack      - Generate a list of stack hogs'
	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1219
	@echo  '  versioncheck    - Sanity check on version.h usage'
1220
	@echo  '  includecheck    - Check for duplicate included header files'
1221
	@echo  '  export_report   - List the usages of all exported symbols'
1222
	@echo  '  headers_check   - Sanity check on exported headers'
1223 1224 1225
	@echo  '  headerdep       - Detect inclusion cycles in headers'
	@$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
	@echo  ''
L
Linus Torvalds 已提交
1226
	@echo  'Kernel packaging:'
S
Sam Ravnborg 已提交
1227
	@$(MAKE) $(build)=$(package-dir) help
L
Linus Torvalds 已提交
1228 1229 1230 1231
	@echo  ''
	@echo  'Documentation targets:'
	@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
	@echo  ''
1232
	@echo  'Architecture specific targets ($(SRCARCH)):'
L
Linus Torvalds 已提交
1233
	@$(if $(archhelp),$(archhelp),\
1234
		echo '  No architecture specific help defined for $(SRCARCH)')
L
Linus Torvalds 已提交
1235 1236 1237 1238 1239
	@echo  ''
	@$(if $(boards), \
		$(foreach b, $(boards), \
		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
		echo '')
1240 1241 1242 1243 1244
	@$(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
1245 1246

	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1247
	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
L
Linus Torvalds 已提交
1248
	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1249 1250
	@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
1251 1252 1253 1254 1255
	@echo  ''
	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
	@echo  'For further info see the ./README file'


1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
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
1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290
# 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
1291
#                      Install the modules built in the module directory
L
Linus Torvalds 已提交
1292 1293 1294 1295
#                      Assumes install directory is already created

# We are always building modules
KBUILD_MODULES := 1
1296
PHONY += crmodverdir
L
Linus Torvalds 已提交
1297
crmodverdir:
S
Sam Ravnborg 已提交
1298
	$(cmd_crmodverdir)
L
Linus Torvalds 已提交
1299

1300
PHONY += $(objtree)/Module.symvers
L
Linus Torvalds 已提交
1301 1302 1303 1304 1305 1306 1307 1308
$(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))
1309
PHONY += $(module-dirs) modules
L
Linus Torvalds 已提交
1310 1311 1312 1313
$(module-dirs): crmodverdir $(objtree)/Module.symvers
	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)

modules: $(module-dirs)
1314
	@$(kecho) '  Building modules, stage 2.';
S
Sam Ravnborg 已提交
1315
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
L
Linus Torvalds 已提交
1316

1317
PHONY += modules_install
1318
modules_install: _emodinst_ _emodinst_post
1319

1320 1321
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
PHONY += _emodinst_
1322 1323
_emodinst_:
	$(Q)mkdir -p $(MODLIB)/$(install-dir)
S
Sam Ravnborg 已提交
1324
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
L
Linus Torvalds 已提交
1325

1326
PHONY += _emodinst_post
1327 1328 1329
_emodinst_post: _emodinst_
	$(call cmd,depmod)

L
Linus Torvalds 已提交
1330 1331
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))

1332
PHONY += $(clean-dirs) clean
L
Linus Torvalds 已提交
1333 1334 1335 1336
$(clean-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)

clean:	rm-dirs := $(MODVERDIR)
1337
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
M
Michal Marek 已提交
1338 1339
                   $(KBUILD_EXTMOD)/modules.order \
                   $(KBUILD_EXTMOD)/modules.builtin
L
Linus Torvalds 已提交
1340 1341
clean: $(clean-dirs)
	$(call cmd,rmdirs)
1342
	$(call cmd,rmfiles)
L
Linus Torvalds 已提交
1343
	@find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
S
Sam Ravnborg 已提交
1344
		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1345 1346
		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
		-o -name '*.gcno' \) -type f -print | xargs rm -f
L
Linus Torvalds 已提交
1347 1348 1349 1350 1351 1352 1353 1354 1355

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  ''
1356 1357

# Dummies...
1358
PHONY += prepare scripts
1359 1360
prepare: ;
scripts: ;
L
Linus Torvalds 已提交
1361 1362 1363 1364
endif # KBUILD_EXTMOD

# Generate tags for editors
# ---------------------------------------------------------------------------
1365 1366
quiet_cmd_tags = GEN     $@
      cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
L
Linus Torvalds 已提交
1367

1368
tags TAGS cscope: FORCE
L
Linus Torvalds 已提交
1369 1370 1371 1372 1373 1374 1375 1376
	$(call cmd,tags)

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

includecheck:
	find * $(RCS_FIND_IGNORE) \
		-name '*.[hcS]' -type f -print | sort \
1377
		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
L
Linus Torvalds 已提交
1378 1379 1380 1381

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

1384 1385 1386
coccicheck:
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@

L
Linus Torvalds 已提交
1387 1388 1389
namespacecheck:
	$(PERL) $(srctree)/scripts/namespace.pl

1390 1391 1392
export_report:
	$(PERL) $(srctree)/scripts/export_report.pl

L
Linus Torvalds 已提交
1393 1394 1395
endif #ifeq ($(config-targets),1)
endif #ifeq ($(mixed-targets),1)

1396
PHONY += checkstack kernelrelease kernelversion
J
Jeff Dike 已提交
1397

J
Jeff Dike 已提交
1398 1399 1400 1401 1402 1403 1404 1405 1406
# 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
1407 1408
checkstack:
	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
J
Jeff Dike 已提交
1409
	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
L
Linus Torvalds 已提交
1410

1411 1412
kernelrelease:
	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1413

1414
kernelversion:
1415
	@echo $(KERNELVERSION)
L
Linus Torvalds 已提交
1416

1417 1418
# Single targets
# ---------------------------------------------------------------------------
1419
# Single targets are compatible with:
R
Robert P. J. Day 已提交
1420
# - build with mixed source and output
1421 1422 1423 1424 1425 1426 1427
# - 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
1428
        build-dir  = $(patsubst %/,%,$(dir $@))
1429 1430 1431 1432 1433 1434 1435
        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

1436
%.s: %.c prepare scripts FORCE
1437
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1438
%.i: %.c prepare scripts FORCE
1439
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1440
%.o: %.c prepare scripts FORCE
1441
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1442
%.lst: %.c prepare scripts FORCE
1443
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1444
%.s: %.S prepare scripts FORCE
1445
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1446
%.o: %.S prepare scripts FORCE
1447
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1448 1449
%.symtypes: %.c prepare scripts FORCE
	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1450

1451
# Modules
S
Sam Ravnborg 已提交
1452 1453 1454 1455 1456
/: 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
1457
	$(cmd_crmodverdir)
1458
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1459 1460
	$(build)=$(build-dir)
%.ko: prepare scripts FORCE
S
Sam Ravnborg 已提交
1461
	$(cmd_crmodverdir)
1462
	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1463
	$(build)=$(build-dir) $(@:.ko=.o)
S
Sam Ravnborg 已提交
1464
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1465

L
Linus Torvalds 已提交
1466 1467 1468 1469 1470 1471 1472 1473 1474
# 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)

1475
# Run depmod only if we have System.map and depmod is executable
1476 1477
quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
      cmd_depmod = \
1478
	if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1479
		$(DEPMOD) -ae -F System.map                                     \
1480
		$(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) )     \
1481 1482 1483
		$(KERNELRELEASE);                                               \
	fi

S
Sam Ravnborg 已提交
1484
# Create temporary dir for module support files
1485 1486 1487
# 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
1488

1489
a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1490
	  $(KBUILD_AFLAGS_KERNEL)                              \
1491
	  $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1492
	  $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
L
Linus Torvalds 已提交
1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513

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

1514
PHONY += FORCE
L
Linus Torvalds 已提交
1515
FORCE:
1516 1517

# Declare the contents of the .PHONY variable as phony.  We keep that
1518
# information in a variable so we can use it in if_changed and friends.
1519
.PHONY: $(PHONY)