Makefile 46.2 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1
VERSION = 3
Linus Torvalds's avatar
Linus Torvalds committed
2
PATCHLEVEL = 6
Linus Torvalds's avatar
Linus Torvalds committed
3
SUBLEVEL = 0
Linus Torvalds's avatar
Linus Torvalds committed
4
EXTRAVERSION =
Linus Torvalds's avatar
Linus Torvalds committed
5
NAME = Terrified Chipmunk
Linus Torvalds's avatar
Linus Torvalds committed
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
Linus Torvalds's avatar
Linus Torvalds committed
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

Linus Torvalds's avatar
Linus Torvalds committed
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)
Linus Torvalds's avatar
Linus Torvalds committed
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.
Linus Torvalds's avatar
Linus Torvalds committed
60

61 62
ifeq ("$(origin C)", "command line")
  KBUILD_CHECKSRC = $(C)
Linus Torvalds's avatar
Linus Torvalds committed
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
Linus Torvalds's avatar
Linus Torvalds committed
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/"
84
#
Linus Torvalds's avatar
Linus Torvalds committed
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)
Linus Torvalds's avatar
Linus Torvalds committed
103 104
endif

Borislav Petkov's avatar
Borislav Petkov committed
105
ifeq ("$(origin W)", "command line")
106
  export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
Borislav Petkov's avatar
Borislav Petkov committed
107 108
endif

Linus Torvalds's avatar
Linus Torvalds committed
109
# That's our default target when none is given on the command line
110
PHONY := _all
Linus Torvalds's avatar
Linus Torvalds committed
111 112
_all:

113 114 115
# Cancel implicit rules on top Makefile
$(CURDIR)/Makefile Makefile: ;

Linus Torvalds's avatar
Linus Torvalds committed
116 117 118 119 120 121 122 123
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))

124 125
PHONY += $(MAKECMDGOALS) sub-make

126
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
127 128 129
	$(Q)@:

sub-make: FORCE
130 131
	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
	KBUILD_SRC=$(CURDIR) \
132 133
	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
	$(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds's avatar
Linus Torvalds committed
134 135 136 137 138 139 140 141 142 143 144

# 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
145
PHONY += all
Linus Torvalds's avatar
Linus Torvalds committed
146 147 148 149 150 151 152 153 154 155 156
ifeq ($(KBUILD_EXTMOD),)
_all: all
else
_all: modules
endif

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

157
VPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds's avatar
Linus Torvalds committed
158

159
export srctree objtree VPATH
Linus Torvalds's avatar
Linus Torvalds committed
160 161 162 163 164 165 166 167 168 169


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

SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
				  -e s/arm.*/arm/ -e s/sa110/arm/ \
170
				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt's avatar
Paul Mundt committed
171
				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
172
				  -e s/sh[234].*/sh/ )
Linus Torvalds's avatar
Linus Torvalds committed
173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189

# 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.
Roland McGrath's avatar
Roland McGrath committed
190 191
# A third alternative is to store a setting in .config so that plain
# "make" in the configured kernel build directory always uses that.
Linus Torvalds's avatar
Linus Torvalds committed
192 193
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
194
export KBUILD_BUILDHOST := $(SUBARCH)
195
ARCH		?= $(SUBARCH)
Roland McGrath's avatar
Roland McGrath committed
196
CROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds's avatar
Linus Torvalds committed
197 198

# Architecture as present in compile.h
199 200
UTS_MACHINE 	:= $(ARCH)
SRCARCH 	:= $(ARCH)
Linus Torvalds's avatar
Linus Torvalds committed
201

202 203 204 205 206 207 208
# Additional ARCH settings for x86
ifeq ($(ARCH),i386)
        SRCARCH := x86
endif
ifeq ($(ARCH),x86_64)
        SRCARCH := x86
endif
209

Sam Ravnborg's avatar
Sam Ravnborg committed
210
# Additional ARCH settings for sparc
Namhyung Kim's avatar
Namhyung Kim committed
211 212 213
ifeq ($(ARCH),sparc32)
       SRCARCH := sparc
endif
214
ifeq ($(ARCH),sparc64)
Sam Ravnborg's avatar
Sam Ravnborg committed
215
       SRCARCH := sparc
216
endif
217

218 219 220 221 222
# Additional ARCH settings for sh
ifeq ($(ARCH),sh64)
       SRCARCH := sh
endif

223
# Additional ARCH settings for tile
224 225 226
ifeq ($(ARCH),tilepro)
       SRCARCH := tile
endif
227 228 229 230
ifeq ($(ARCH),tilegx)
       SRCARCH := tile
endif

Sam Ravnborg's avatar
Sam Ravnborg committed
231 232 233
# Where to locate arch specific headers
hdr-arch  := $(SRCARCH)

234
KCONFIG_CONFIG	?= .config
235
export KCONFIG_CONFIG
236

Linus Torvalds's avatar
Linus Torvalds committed
237 238 239 240 241
# 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)

242 243
HOSTCC       = gcc
HOSTCXX      = g++
244
HOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
245
HOSTCXXFLAGS = -O2
Linus Torvalds's avatar
Linus Torvalds committed
246

247 248
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
Linus Torvalds's avatar
Linus Torvalds committed
249 250 251 252 253 254 255

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
256
#	make sure the checksums are up to date before we record them.
Linus Torvalds's avatar
Linus Torvalds committed
257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273

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

274
export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds's avatar
Linus Torvalds committed
275 276 277 278 279 280 281 282 283 284 285 286 287 288
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. 
289
# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds's avatar
Linus Torvalds committed
290 291
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
Adrian Bunk's avatar
Adrian Bunk committed
292
# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds's avatar
Linus Torvalds committed
293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310
# 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

311
ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
Linus Torvalds's avatar
Linus Torvalds committed
312 313 314 315 316 317 318 319 320
  quiet=silent_
endif

export quiet Q KBUILD_VERBOSE


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

321 322
# We need some generic definitions (do not try to remake the file).
$(srctree)/scripts/Kbuild.include: ;
323
include $(srctree)/scripts/Kbuild.include
Linus Torvalds's avatar
Linus Torvalds committed
324 325 326 327 328 329 330 331 332 333 334 335 336 337

# 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
338
INSTALLKERNEL  := installkernel
Linus Torvalds's avatar
Linus Torvalds committed
339 340 341 342
DEPMOD		= /sbin/depmod
PERL		= perl
CHECK		= sparse

343 344
CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
		  -Wbitwise -Wno-return-void $(CF)
345 346 347
CFLAGS_MODULE   =
AFLAGS_MODULE   =
LDFLAGS_MODULE  =
Linus Torvalds's avatar
Linus Torvalds committed
348 349
CFLAGS_KERNEL	=
AFLAGS_KERNEL	=
350
CFLAGS_GCOV	= -fprofile-arcs -ftest-coverage
Linus Torvalds's avatar
Linus Torvalds committed
351 352 353 354


# Use LINUXINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
Sam Ravnborg's avatar
Sam Ravnborg committed
355 356
LINUXINCLUDE    := -I$(srctree)/arch/$(hdr-arch)/include \
                   -Iarch/$(hdr-arch)/include/generated -Iinclude \
357
                   $(if $(KBUILD_SRC), -I$(srctree)/include) \
358
                   -include $(srctree)/include/linux/kconfig.h
Linus Torvalds's avatar
Linus Torvalds committed
359

360
KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds's avatar
Linus Torvalds committed
361

362
KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
363
		   -fno-strict-aliasing -fno-common \
364
		   -Werror-implicit-function-declaration \
365 366
		   -Wno-format-security \
		   -fno-delete-null-pointer-checks
367 368
KBUILD_AFLAGS_KERNEL :=
KBUILD_CFLAGS_KERNEL :=
369
KBUILD_AFLAGS   := -D__ASSEMBLY__
370 371 372
KBUILD_AFLAGS_MODULE  := -DMODULE
KBUILD_CFLAGS_MODULE  := -DMODULE
KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds's avatar
Linus Torvalds committed
373

Roman Zippel's avatar
Roman Zippel committed
374 375
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
376
KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
377

378
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
379
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
380 381
export CPP AR NM STRIP OBJCOPY OBJDUMP
export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
382
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds's avatar
Linus Torvalds committed
383

384
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
385
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
386
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
387
export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
388
export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
389
export KBUILD_ARFLAGS
Linus Torvalds's avatar
Linus Torvalds committed
390 391 392 393 394 395 396 397

# 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

Jesper Juhl's avatar
Jesper Juhl committed
398 399 400 401
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
Linus Torvalds's avatar
Linus Torvalds committed
402 403 404 405 406

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

# Basic helpers built in scripts/
407
PHONY += scripts_basic
Linus Torvalds's avatar
Linus Torvalds committed
408 409
scripts_basic:
	$(Q)$(MAKE) $(build)=scripts/basic
410
	$(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds's avatar
Linus Torvalds committed
411

412 413 414
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;

415
PHONY += outputmakefile
416 417 418
# outputmakefile generates a Makefile in the output directory, if using a
# separate output directory. This allows convenient use of make in the
# output directory.
Linus Torvalds's avatar
Linus Torvalds committed
419
outputmakefile:
420
ifneq ($(KBUILD_SRC),)
421
	$(Q)ln -fsn $(srctree) source
422 423 424
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif
Linus Torvalds's avatar
Linus Torvalds committed
425

Sam Ravnborg's avatar
Sam Ravnborg committed
426 427 428 429 430 431
# Support for using generic headers in asm-generic
PHONY += asm-generic
asm-generic:
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
	            obj=arch/$(SRCARCH)/include/generated/asm

Linus Torvalds's avatar
Linus Torvalds committed
432 433 434 435
# 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.
436
# For example 'make oldconfig all'.
Linus Torvalds's avatar
Linus Torvalds committed
437 438 439
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).

440
no-dot-config-targets := clean mrproper distclean \
441
			 cscope gtags TAGS tags help %docs check% coccicheck \
442
			 include/linux/version.h headers_% archheaders archscripts \
443
			 kernelversion %src-pkg
Linus Torvalds's avatar
Linus Torvalds committed
444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480

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'
481
include $(srctree)/arch/$(SRCARCH)/Makefile
482
export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds's avatar
Linus Torvalds committed
483

484 485 486 487 488
config: scripts_basic outputmakefile FORCE
	$(Q)mkdir -p include/linux include/config
	$(Q)$(MAKE) $(build)=scripts/kconfig $@

%config: scripts_basic outputmakefile FORCE
489
	$(Q)mkdir -p include/linux include/config
Linus Torvalds's avatar
Linus Torvalds committed
490 491 492 493 494 495 496 497 498 499
	$(Q)$(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
500
# in parallel
501
PHONY += scripts
502
scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds's avatar
Linus Torvalds committed
503 504 505 506
	$(Q)$(MAKE) $(build)=$(@)

# Objects we will link into vmlinux / subdirs we need to visit
init-y		:= init/
507
drivers-y	:= drivers/ sound/ firmware/
Linus Torvalds's avatar
Linus Torvalds committed
508 509 510 511 512 513
net-y		:= net/
libs-y		:= lib/
core-y		:= usr/
endif # KBUILD_EXTMOD

ifeq ($(dot-config),1)
514 515
# Read in config
-include include/config/auto.conf
Linus Torvalds's avatar
Linus Torvalds committed
516

517
ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds's avatar
Linus Torvalds committed
518 519
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
520
-include include/config/auto.conf.cmd
Linus Torvalds's avatar
Linus Torvalds committed
521 522

# To avoid any implicit rule to kick in, define an empty command
523
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds's avatar
Linus Torvalds committed
524

525
# If .config is newer than include/config/auto.conf, someone tinkered
526
# with it and forgot to run make oldconfig.
527
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
528
# we execute the config step to be sure to catch updated Kconfig files
529
include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds's avatar
Linus Torvalds committed
530
	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
531
else
532
# external modules needs include/generated/autoconf.h and include/config/auto.conf
533 534 535 536
# 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:
537
	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
Michal Marek's avatar
Michal Marek committed
538 539 540 541 542
	echo >&2;							\
	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
	echo >&2 ;							\
543 544 545
	/bin/false)

endif # KBUILD_EXTMOD
546

Linus Torvalds's avatar
Linus Torvalds committed
547 548
else
# Dummy target needed, because used as prerequisite
549
include/config/auto.conf: ;
550
endif # $(dot-config)
Linus Torvalds's avatar
Linus Torvalds committed
551 552 553 554

# 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
Michal Marek's avatar
Michal Marek committed
555
# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds's avatar
Linus Torvalds committed
556 557 558
all: vmlinux

ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
559
KBUILD_CFLAGS	+= -Os
Linus Torvalds's avatar
Linus Torvalds committed
560
else
561
KBUILD_CFLAGS	+= -O2
Linus Torvalds's avatar
Linus Torvalds committed
562 563
endif

564 565
include $(srctree)/arch/$(SRCARCH)/Makefile

Andi Kleen's avatar
Andi Kleen committed
566 567 568 569 570 571 572 573 574 575
ifdef CONFIG_READABLE_ASM
# Disable optimizations that make assembler listings hard to read.
# reorder blocks reorders the control in the function
# ipa clone creates specialized cloned functions
# partial inlining inlines only parts of functions
KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
                 $(call cc-option,-fno-ipa-cp-clone,) \
                 $(call cc-option,-fno-partial-inlining)
endif

576
ifneq ($(CONFIG_FRAME_WARN),0)
577 578 579
KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
endif

580
# Force gcc to behave correct even for buggy distributions
Tejun Heo's avatar
Tejun Heo committed
581
ifndef CONFIG_CC_STACKPROTECTOR
582
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo's avatar
Tejun Heo committed
583
endif
584

585 586
# This warning generated too much noise in a regular build.
# Use make W=1 to enable this warning (see scripts/Makefile.build)
587
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
588

Linus Torvalds's avatar
Linus Torvalds committed
589
ifdef CONFIG_FRAME_POINTER
590
KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds's avatar
Linus Torvalds committed
591
else
592 593 594 595 596 597
# Some targets (ARM with Thumb2, for example), can't be built with frame
# pointers.  For those, we don't have FUNCTION_TRACER automatically
# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
# incompatible with -fomit-frame-pointer with current GCC, so we don't use
# -fomit-frame-pointer with FUNCTION_TRACER.
ifndef CONFIG_FUNCTION_TRACER
598
KBUILD_CFLAGS	+= -fomit-frame-pointer
Linus Torvalds's avatar
Linus Torvalds committed
599
endif
600
endif
Linus Torvalds's avatar
Linus Torvalds committed
601 602

ifdef CONFIG_DEBUG_INFO
603
KBUILD_CFLAGS	+= -g
604
KBUILD_AFLAGS	+= -gdwarf-2
Linus Torvalds's avatar
Linus Torvalds committed
605 606
endif

607 608 609 610
ifdef CONFIG_DEBUG_INFO_REDUCED
KBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly)
endif

611
ifdef CONFIG_FUNCTION_TRACER
612 613 614 615 616
ifdef CONFIG_HAVE_FENTRY
CC_USING_FENTRY	:= $(call cc-option, -mfentry -DCC_USING_FENTRY)
endif
KBUILD_CFLAGS	+= -pg $(CC_USING_FENTRY)
KBUILD_AFLAGS	+= $(CC_USING_FENTRY)
617
ifdef CONFIG_DYNAMIC_FTRACE
618
	ifdef CONFIG_HAVE_C_RECORDMCOUNT
619 620 621 622
		BUILD_C_RECORDMCOUNT := y
		export BUILD_C_RECORDMCOUNT
	endif
endif
623 624
endif

625 626 627 628 629
# We trigger additional mismatches with less inlining
ifdef CONFIG_DEBUG_SECTION_MISMATCH
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
endif

630
# arch Makefile may override CC so keep this after arch Makefile is included
631
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
632 633
CHECKFLAGS     += $(NOSTDINC_FLAGS)

Linus Torvalds's avatar
Linus Torvalds committed
634
# warn about C99 declaration after statement
635
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds's avatar
Linus Torvalds committed
636

637
# disable pointer signed / unsigned warnings in gcc 4.0
638
KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds's avatar
Linus Torvalds committed
639

640
# disable invalid "can't wrap" optimizations for signed / pointers
641
KBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
642

643 644 645
# conserve stack if available
KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)

646 647 648
# use the deterministic mode of AR if available
KBUILD_ARFLAGS := $(call ar-option,D)

649 650 651 652 653
# check for 'asm goto'
ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
	KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
endif

654
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670
# 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
671

Roland McGrath's avatar
Roland McGrath committed
672 673
# Use --build-id when available.
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
674
			      $(call cc-ldoption, -Wl$(comma)--build-id,))
675
KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath's avatar
Roland McGrath committed
676 677
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)

678
ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
679
LDFLAGS_vmlinux	+= $(call ld-option, -X,)
680 681
endif

Linus Torvalds's avatar
Linus Torvalds committed
682
# Default kernel image to build when no specific target is given.
683
# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds's avatar
Linus Torvalds committed
684 685 686 687 688 689 690 691 692 693 694 695 696
# 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
697
# makefile but the argument can be passed to make if needed.
Linus Torvalds's avatar
Linus Torvalds committed
698 699
#

700
MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds's avatar
Linus Torvalds committed
701 702
export MODLIB

703
#
704 705 706
#  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,
707
#  INSTALL_MOD_STRIP value will be used as the options to the strip command.
708

709 710
ifdef INSTALL_MOD_STRIP
ifeq ($(INSTALL_MOD_STRIP),1)
711
mod_strip_cmd = $(STRIP) --strip-debug
712
else
713
mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
714 715
endif # INSTALL_MOD_STRIP=1
else
716
mod_strip_cmd = true
717 718 719
endif # INSTALL_MOD_STRIP
export mod_strip_cmd

Linus Torvalds's avatar
Linus Torvalds committed
720 721

ifeq ($(KBUILD_EXTMOD),)
722
core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds's avatar
Linus Torvalds committed
723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740

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)

741
# Externally visible symbols (used by link-vmlinux.sh)
742 743 744
export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
745
export LDFLAGS_vmlinux
746

747
vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds's avatar
Linus Torvalds committed
748

749 750 751
# Final link of vmlinux
      cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
quiet_cmd_link-vmlinux = LINK    $@
Linus Torvalds's avatar
Linus Torvalds committed
752

753 754 755
# Include targets which we want to
# execute if the rest of the kernel build went well.
vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
756
ifdef CONFIG_HEADERS_CHECK
757
	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
758 759 760
endif
ifdef CONFIG_SAMPLES
	$(Q)$(MAKE) $(build)=samples
761 762 763
endif
ifdef CONFIG_BUILD_DOCSRC
	$(Q)$(MAKE) $(build)=Documentation
764
endif
765
	+$(call if_changed,link-vmlinux)
766

Linus Torvalds's avatar
Linus Torvalds committed
767 768
# The actual objects are generated when descending, 
# make sure no implicit rule kicks in
769
$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds's avatar
Linus Torvalds committed
770 771 772 773 774 775 776

# 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

777
PHONY += $(vmlinux-dirs)
778
$(vmlinux-dirs): prepare scripts
Linus Torvalds's avatar
Linus Torvalds committed
779 780
	$(Q)$(MAKE) $(build)=$@

Roman Zippel's avatar
Roman Zippel committed
781 782
# Store (new) KERNELRELASE string in include/config/kernel.release
include/config/kernel.release: include/config/auto.conf FORCE
783
	$(Q)rm -f $@
784
	$(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
785 786


Linus Torvalds's avatar
Linus Torvalds committed
787
# Things we need to do before we recursively start building the kernel
788 789 790 791
# 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.
Linus Torvalds's avatar
Linus Torvalds committed
792

793
# Listed in dependency order
794
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
795

796
# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds's avatar
Linus Torvalds committed
797 798
# and if so do:
# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippel's avatar
Roman Zippel committed
799
prepare3: include/config/kernel.release
Linus Torvalds's avatar
Linus Torvalds committed
800
ifneq ($(KBUILD_SRC),)
801
	@$(kecho) '  Using $(srctree) as source for kernel'
802
	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek's avatar
Michal Marek committed
803 804
		echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
		echo >&2 "  in the '$(srctree)' directory.";\
Linus Torvalds's avatar
Linus Torvalds committed
805 806 807 808
		/bin/false; \
	fi;
endif

809
# prepare2 creates a makefile if using a separate output directory
Sam Ravnborg's avatar
Sam Ravnborg committed
810
prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds's avatar
Linus Torvalds committed
811

812
prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
Sam Ravnborg's avatar
Sam Ravnborg committed
813
                   include/config/auto.conf
Sam Ravnborg's avatar
Sam Ravnborg committed
814
	$(cmd_crmodverdir)
Linus Torvalds's avatar
Linus Torvalds committed
815

816
archprepare: archheaders archscripts prepare1 scripts_basic
817 818

prepare0: archprepare FORCE
819
	$(Q)$(MAKE) $(build)=.
820

Linus Torvalds's avatar
Linus Torvalds committed
821
# All the preparing..
822
prepare: prepare0
Linus Torvalds's avatar
Linus Torvalds committed
823 824 825 826 827 828 829 830

# 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
Sam Ravnborg's avatar
Sam Ravnborg committed
831 832 833 834 835 836 837
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
Linus Torvalds's avatar
Linus Torvalds committed
838 839

define filechk_version.h
Jesper Juhl's avatar
Jesper Juhl committed
840 841
	(echo \#define LINUX_VERSION_CODE $(shell                         \
	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg's avatar
Sam Ravnborg committed
842
	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
Linus Torvalds's avatar
Linus Torvalds committed
843 844
endef

Sam Ravnborg's avatar
Sam Ravnborg committed
845
include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds's avatar
Linus Torvalds committed
846 847
	$(call filechk,version.h)

848
include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg's avatar
Sam Ravnborg committed
849 850
	$(call filechk,utsrelease.h)

851 852
PHONY += headerdep
headerdep:
853 854
	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
855

Linus Torvalds's avatar
Linus Torvalds committed
856 857
# ---------------------------------------------------------------------------

858
PHONY += depend dep
Linus Torvalds's avatar
Linus Torvalds committed
859 860 861
depend dep:
	@echo '*** Warning: make $@ is unnecessary now.'

862 863 864 865 866 867 868 869 870 871
# ---------------------------------------------------------------------------
# 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

872 873 874
# ---------------------------------------------------------------------------
# Kernel headers

875 876
#Default location for installed headers
export INSTALL_HDR_PATH = $(objtree)/usr
877

878
hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
879 880 881

# 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)
882

883 884 885
PHONY += archheaders
archheaders:

886 887 888
PHONY += archscripts
archscripts:

889
PHONY += __headers
890
__headers: include/linux/version.h scripts_basic asm-generic archheaders archscripts FORCE
891
	$(Q)$(MAKE) $(build)=scripts build_unifdef
892 893

PHONY += headers_install_all
894 895
headers_install_all:
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
896

897
PHONY += headers_install
898
headers_install: __headers
899
	$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
900
	$(error Headers not exportable for the $(SRCARCH) architecture))
901
	$(Q)$(MAKE) $(hdr-inst)=include
902
	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
903

904 905
PHONY += headers_check_all
headers_check_all: headers_install_all
906
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
907

908 909
PHONY += headers_check
headers_check: headers_install
910
	$(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
911
	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
912

Linus Torvalds's avatar
Linus Torvalds committed
913 914 915 916 917
# ---------------------------------------------------------------------------
# Modules

ifdef CONFIG_MODULES

918
# By default, build modules as well
Linus Torvalds's avatar
Linus Torvalds committed
919

920
all: modules
Linus Torvalds's avatar
Linus Torvalds committed
921 922

#	Build modules
Tejun Heo's avatar
Tejun Heo committed
923 924 925 926
#
#	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.
Linus Torvalds's avatar
Linus Torvalds committed
927

928
PHONY += modules
929
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo's avatar
Tejun Heo committed
930
	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
931
	@$(kecho) '  Building modules, stage 2.';
Sam Ravnborg's avatar
Sam Ravnborg committed
932
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
933
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds's avatar
Linus Torvalds committed
934

935 936 937
modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin

938
%/modules.builtin: include/config/auto.conf
939 940
	$(Q)$(MAKE) $(modbuiltin)=$*

Linus Torvalds's avatar
Linus Torvalds committed
941 942

# Target to prepare building external modules
943
PHONY += modules_prepare
944
modules_prepare: prepare scripts
Linus Torvalds's avatar
Linus Torvalds committed
945 946

# Target to install modules
947
PHONY += modules_install
Linus Torvalds's avatar
Linus Torvalds committed
948 949
modules_install: _modinst_ _modinst_post

950
PHONY += _modinst_
951
_modinst_:
Linus Torvalds's avatar
Linus Torvalds committed
952 953 954 955 956 957 958 959
	@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
Tejun Heo's avatar
Tejun Heo committed
960
	@cp -f $(objtree)/modules.order $(MODLIB)/
961
	@cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborg's avatar
Sam Ravnborg committed
962
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds's avatar
Linus Torvalds committed
963

964
# This depmod is only for convenience to give the initial
Linus Torvalds's avatar
Linus Torvalds committed
965 966
# boot a modules.dep even before / is mounted read-write.  However the
# boot script depmod is the master version.
967
PHONY += _modinst_post
Linus Torvalds's avatar
Linus Torvalds committed
968
_modinst_post: _modinst_
969
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
970
	$(call cmd,depmod)
Linus Torvalds's avatar
Linus Torvalds committed
971 972 973 974 975 976 977

else # CONFIG_MODULES

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

modules modules_install: FORCE
Michal Marek's avatar
Michal Marek committed
978 979 980 981 982
	@echo >&2
	@echo >&2 "The present kernel configuration has modules disabled."
	@echo >&2 "Type 'make config' and enable loadable module support."
	@echo >&2 "Then build a kernel with module support enabled."
	@echo >&2
Linus Torvalds's avatar
Linus Torvalds committed
983 984 985 986 987 988 989 990 991 992 993 994 995 996 997
	@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)

# Directories & files removed with 'make mrproper'
Sam Ravnborg's avatar
Sam Ravnborg committed
998 999
MRPROPER_DIRS  += include/config usr/include include/generated          \
                  arch/*/include/generated
Sam Ravnborg's avatar
Sam Ravnborg committed
1000
MRPROPER_FILES += .config .config.old .version .old_version             \
1001
                  include/linux/version.h                               \
1002
		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
Linus Torvalds's avatar
Linus Torvalds committed
1003 1004 1005 1006 1007

# clean - Delete most, but leave enough to build external modules
#
clean: rm-dirs  := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
1008
clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds's avatar
Linus Torvalds committed
1009

1010
PHONY += $(clean-dirs) clean archclean
Linus Torvalds's avatar
Linus Torvalds committed
1011 1012 1013
$(clean-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)

1014
clean: archclean
Linus Torvalds's avatar
Linus Torvalds committed
1015 1016 1017 1018 1019 1020 1021

# 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)

1022
PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds's avatar
Linus Torvalds committed
1023 1024 1025 1026 1027 1028 1029 1030 1031
$(mrproper-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)

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

# distclean
#
1032
PHONY += distclean
Linus Torvalds's avatar
Linus Torvalds committed
1033 1034 1035

distclean: mrproper
	@find $(srctree) $(RCS_FIND_IGNORE) \
1036
		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds's avatar
Linus Torvalds committed
1037
		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1038
		-o -name '.*.rej' \
Linus Torvalds's avatar
Linus Torvalds committed
1039 1040 1041 1042 1043 1044 1045 1046 1047
		-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
		-type f -print | xargs rm -f


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

1048 1049
%src-pkg: FORCE
	$(Q)$(MAKE) $(build)=$(package-dir) $@
1050
%pkg: include/config/kernel.release FORCE
1051
	$(Q)$(MAKE) $(build)=$(package-dir) $@
1052
rpm: include/config/kernel.release FORCE
1053
	$(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds's avatar
Linus Torvalds committed
1054 1055 1056 1057 1058


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

1059
boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds's avatar
Linus Torvalds committed
1060
boards := $(notdir $(boards))
1061 1062
board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds's avatar
Linus Torvalds committed
1063 1064 1065

help:
	@echo  'Cleaning targets:'
1066
	@echo  '  clean		  - Remove most generated files but keep the config and'
1067
	@echo  '                    enough build support to build external modules'
1068
	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1069
	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
Linus Torvalds's avatar
Linus Torvalds committed
1070 1071 1072 1073 1074 1075 1076 1077
	@echo  ''
	@echo  'Configuration targets:'
	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
	@echo  ''
	@echo  'Other generic targets:'