Makefile 47.4 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1
VERSION = 3
Linus Torvalds's avatar
Linus Torvalds committed
2
PATCHLEVEL = 11
Greg Kroah-Hartman's avatar
Greg Kroah-Hartman committed
3
SUBLEVEL = 2
Linus Torvalds's avatar
Linus Torvalds committed
4
EXTRAVERSION =
Linus Torvalds's avatar
Linus Torvalds committed
5
NAME = Linux for Workgroups
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

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


# 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.

168
169
SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
				  -e s/sun4u/sparc64/ \
Linus Torvalds's avatar
Linus Torvalds committed
170
				  -e s/arm.*/arm/ -e s/sa110/arm/ \
171
				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt's avatar
Paul Mundt committed
172
				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
173
				  -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
Linus Torvalds's avatar
Linus Torvalds committed
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190

# 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
191
192
# 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
193
194
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
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
355
356
357
358
359
360
# Use USERINCLUDE when you must reference the UAPI directories only.
USERINCLUDE    := \
		-I$(srctree)/arch/$(hdr-arch)/include/uapi \
		-Iarch/$(hdr-arch)/include/generated/uapi \
		-I$(srctree)/include/uapi \
		-Iinclude/generated/uapi \
                -include $(srctree)/include/linux/kconfig.h

Linus Torvalds's avatar
Linus Torvalds committed
361
362
# Use LINUXINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
363
364
365
366
367
368
LINUXINCLUDE    := \
		-I$(srctree)/arch/$(hdr-arch)/include \
		-Iarch/$(hdr-arch)/include/generated \
		$(if $(KBUILD_SRC), -I$(srctree)/include) \
		-Iinclude \
		$(USERINCLUDE)
Linus Torvalds's avatar
Linus Torvalds committed
369

370
KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds's avatar
Linus Torvalds committed
371

372
KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
373
		   -fno-strict-aliasing -fno-common \
374
		   -Werror-implicit-function-declaration \
375
376
		   -Wno-format-security \
		   -fno-delete-null-pointer-checks
377
378
KBUILD_AFLAGS_KERNEL :=
KBUILD_CFLAGS_KERNEL :=
379
KBUILD_AFLAGS   := -D__ASSEMBLY__
380
381
382
KBUILD_AFLAGS_MODULE  := -DMODULE
KBUILD_CFLAGS_MODULE  := -DMODULE
KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds's avatar
Linus Torvalds committed
383

Roman Zippel's avatar
Roman Zippel committed
384
385
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
386
KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
387

388
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
389
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
390
391
export CPP AR NM STRIP OBJCOPY OBJDUMP
export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
392
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds's avatar
Linus Torvalds committed
393

394
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
395
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
396
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
397
export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
398
export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
399
export KBUILD_ARFLAGS
Linus Torvalds's avatar
Linus Torvalds committed
400
401
402
403
404
405
406
407

# 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
408
409
410
411
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
412
413
414
415
416

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

# Basic helpers built in scripts/
417
PHONY += scripts_basic
Linus Torvalds's avatar
Linus Torvalds committed
418
419
scripts_basic:
	$(Q)$(MAKE) $(build)=scripts/basic
420
	$(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds's avatar
Linus Torvalds committed
421

422
423
424
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;

425
PHONY += outputmakefile
426
427
428
# 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
429
outputmakefile:
430
ifneq ($(KBUILD_SRC),)
431
	$(Q)ln -fsn $(srctree) source
432
433
434
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif
Linus Torvalds's avatar
Linus Torvalds committed
435

Sam Ravnborg's avatar
Sam Ravnborg committed
436
437
438
439
# Support for using generic headers in asm-generic
PHONY += asm-generic
asm-generic:
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
440
441
442
	            src=asm obj=arch/$(SRCARCH)/include/generated/asm
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
	            src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
Sam Ravnborg's avatar
Sam Ravnborg committed
443

Linus Torvalds's avatar
Linus Torvalds committed
444
445
446
447
# 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.
448
# For example 'make oldconfig all'.
Linus Torvalds's avatar
Linus Torvalds committed
449
450
451
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).

452
version_h := include/generated/uapi/linux/version.h
David Howells's avatar
David Howells committed
453

454
no-dot-config-targets := clean mrproper distclean \
455
			 cscope gtags TAGS tags help %docs check% coccicheck \
David Howells's avatar
David Howells committed
456
			 $(version_h) headers_% archheaders archscripts \
457
			 kernelversion %src-pkg
Linus Torvalds's avatar
Linus Torvalds committed
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494

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'
495
include $(srctree)/arch/$(SRCARCH)/Makefile
496
export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds's avatar
Linus Torvalds committed
497

498
499
500
501
502
config: scripts_basic outputmakefile FORCE
	$(Q)mkdir -p include/linux include/config
	$(Q)$(MAKE) $(build)=scripts/kconfig $@

%config: scripts_basic outputmakefile FORCE
503
	$(Q)mkdir -p include/linux include/config
Linus Torvalds's avatar
Linus Torvalds committed
504
505
506
507
508
509
510
511
512
513
	$(Q)$(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
514
# in parallel
515
PHONY += scripts
516
517
scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
	 asm-generic
Linus Torvalds's avatar
Linus Torvalds committed
518
519
520
521
	$(Q)$(MAKE) $(build)=$(@)

# Objects we will link into vmlinux / subdirs we need to visit
init-y		:= init/
522
drivers-y	:= drivers/ sound/ firmware/
Linus Torvalds's avatar
Linus Torvalds committed
523
524
525
526
527
528
net-y		:= net/
libs-y		:= lib/
core-y		:= usr/
endif # KBUILD_EXTMOD

ifeq ($(dot-config),1)
529
530
# Read in config
-include include/config/auto.conf
Linus Torvalds's avatar
Linus Torvalds committed
531

532
ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds's avatar
Linus Torvalds committed
533
534
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
535
-include include/config/auto.conf.cmd
Linus Torvalds's avatar
Linus Torvalds committed
536
537

# To avoid any implicit rule to kick in, define an empty command
538
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds's avatar
Linus Torvalds committed
539

540
# If .config is newer than include/config/auto.conf, someone tinkered
541
# with it and forgot to run make oldconfig.
542
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
543
# we execute the config step to be sure to catch updated Kconfig files
544
include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds's avatar
Linus Torvalds committed
545
	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
546
else
547
# external modules needs include/generated/autoconf.h and include/config/auto.conf
548
549
550
551
# 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:
552
	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
Michal Marek's avatar
Michal Marek committed
553
554
555
556
557
	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 ;							\
558
559
560
	/bin/false)

endif # KBUILD_EXTMOD
561

Linus Torvalds's avatar
Linus Torvalds committed
562
563
else
# Dummy target needed, because used as prerequisite
564
include/config/auto.conf: ;
565
endif # $(dot-config)
Linus Torvalds's avatar
Linus Torvalds committed
566
567
568
569

# 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
570
# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds's avatar
Linus Torvalds committed
571
572
573
all: vmlinux

ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
574
KBUILD_CFLAGS	+= -Os $(call cc-disable-warning,maybe-uninitialized,)
Linus Torvalds's avatar
Linus Torvalds committed
575
else
576
KBUILD_CFLAGS	+= -O2
Linus Torvalds's avatar
Linus Torvalds committed
577
578
endif

579
580
include $(srctree)/arch/$(SRCARCH)/Makefile

Andi Kleen's avatar
Andi Kleen committed
581
582
583
584
585
586
587
588
589
590
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

591
ifneq ($(CONFIG_FRAME_WARN),0)
592
593
594
KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
endif

595
# Force gcc to behave correct even for buggy distributions
Tejun Heo's avatar
Tejun Heo committed
596
ifndef CONFIG_CC_STACKPROTECTOR
597
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo's avatar
Tejun Heo committed
598
endif
599

600
601
# This warning generated too much noise in a regular build.
# Use make W=1 to enable this warning (see scripts/Makefile.build)
602
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
603

Linus Torvalds's avatar
Linus Torvalds committed
604
ifdef CONFIG_FRAME_POINTER
605
KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds's avatar
Linus Torvalds committed
606
else
607
608
609
610
611
612
# 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
613
KBUILD_CFLAGS	+= -fomit-frame-pointer
Linus Torvalds's avatar
Linus Torvalds committed
614
endif
615
endif
Linus Torvalds's avatar
Linus Torvalds committed
616
617

ifdef CONFIG_DEBUG_INFO
618
KBUILD_CFLAGS	+= -g
619
KBUILD_AFLAGS	+= -gdwarf-2
Linus Torvalds's avatar
Linus Torvalds committed
620
621
endif

622
ifdef CONFIG_DEBUG_INFO_REDUCED
623
624
KBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly) \
		   $(call cc-option,-fno-var-tracking)
625
626
endif

627
ifdef CONFIG_FUNCTION_TRACER
628
629
630
631
632
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)
633
ifdef CONFIG_DYNAMIC_FTRACE
634
	ifdef CONFIG_HAVE_C_RECORDMCOUNT
635
636
637
638
		BUILD_C_RECORDMCOUNT := y
		export BUILD_C_RECORDMCOUNT
	endif
endif
639
640
endif

641
642
643
644
645
# We trigger additional mismatches with less inlining
ifdef CONFIG_DEBUG_SECTION_MISMATCH
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
endif

646
# arch Makefile may override CC so keep this after arch Makefile is included
647
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
648
649
CHECKFLAGS     += $(NOSTDINC_FLAGS)

Linus Torvalds's avatar
Linus Torvalds committed
650
# warn about C99 declaration after statement
651
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds's avatar
Linus Torvalds committed
652

653
# disable pointer signed / unsigned warnings in gcc 4.0
654
KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds's avatar
Linus Torvalds committed
655

656
# disable invalid "can't wrap" optimizations for signed / pointers
657
KBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
658

659
660
661
# conserve stack if available
KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)

662
663
664
# use the deterministic mode of AR if available
KBUILD_ARFLAGS := $(call ar-option,D)

665
666
667
668
669
# check for 'asm goto'
ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
	KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
endif

670
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
671
672
673
KBUILD_CPPFLAGS += $(KCPPFLAGS)
KBUILD_AFLAGS += $(KAFLAGS)
KBUILD_CFLAGS += $(KCFLAGS)
674

Roland McGrath's avatar
Roland McGrath committed
675
676
# Use --build-id when available.
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
677
			      $(call cc-ldoption, -Wl$(comma)--build-id,))
678
KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath's avatar
Roland McGrath committed
679
680
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)

681
ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
682
LDFLAGS_vmlinux	+= $(call ld-option, -X,)
683
684
endif

Linus Torvalds's avatar
Linus Torvalds committed
685
# Default kernel image to build when no specific target is given.
686
# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds's avatar
Linus Torvalds committed
687
688
689
690
691
692
693
694
695
696
697
698
699
# 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
700
# makefile but the argument can be passed to make if needed.
Linus Torvalds's avatar
Linus Torvalds committed
701
702
#

703
MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds's avatar
Linus Torvalds committed
704
705
export MODLIB

706
#
707
708
709
#  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,
710
#  INSTALL_MOD_STRIP value will be used as the options to the strip command.
711

712
713
ifdef INSTALL_MOD_STRIP
ifeq ($(INSTALL_MOD_STRIP),1)
714
mod_strip_cmd = $(STRIP) --strip-debug
715
else
716
mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
717
718
endif # INSTALL_MOD_STRIP=1
else
719
mod_strip_cmd = true
720
721
722
endif # INSTALL_MOD_STRIP
export mod_strip_cmd

Linus Torvalds's avatar
Linus Torvalds committed
723

724
ifdef CONFIG_MODULE_SIG_ALL
725
726
727
MODSECKEY = ./signing_key.priv
MODPUBKEY = ./signing_key.x509
export MODPUBKEY
728
mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
729
730
731
732
733
734
else
mod_sign_cmd = true
endif
export mod_sign_cmd


Linus Torvalds's avatar
Linus Torvalds committed
735
ifeq ($(KBUILD_EXTMOD),)
736
core-y		+= kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds's avatar
Linus Torvalds committed
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754

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)

755
# Externally visible symbols (used by link-vmlinux.sh)
756
757
758
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
759
export LDFLAGS_vmlinux
760
761
# used by scripts/pacmage/Makefile
export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
762

763
vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds's avatar
Linus Torvalds committed
764

765
766
767
# 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
768

769
770
771
# Include targets which we want to
# execute if the rest of the kernel build went well.
vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
772
ifdef CONFIG_HEADERS_CHECK
773
	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
774
775
776
endif
ifdef CONFIG_SAMPLES
	$(Q)$(MAKE) $(build)=samples
777
778
779
endif
ifdef CONFIG_BUILD_DOCSRC
	$(Q)$(MAKE) $(build)=Documentation
780
endif
781
	+$(call if_changed,link-vmlinux)
782

Linus Torvalds's avatar
Linus Torvalds committed
783
784
# The actual objects are generated when descending, 
# make sure no implicit rule kicks in
785
$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds's avatar
Linus Torvalds committed
786
787
788
789
790
791
792

# 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

793
PHONY += $(vmlinux-dirs)
794
$(vmlinux-dirs): prepare scripts
Linus Torvalds's avatar
Linus Torvalds committed
795
796
	$(Q)$(MAKE) $(build)=$@

797
# Store (new) KERNELRELEASE string in include/config/kernel.release
Roman Zippel's avatar
Roman Zippel committed
798
include/config/kernel.release: include/config/auto.conf FORCE
799
	$(Q)rm -f $@
800
	$(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
801
802


Linus Torvalds's avatar
Linus Torvalds committed
803
# Things we need to do before we recursively start building the kernel
804
805
806
807
# 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
808

809
# Listed in dependency order
810
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
811

812
# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds's avatar
Linus Torvalds committed
813
814
# and if so do:
# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippel's avatar
Roman Zippel committed
815
prepare3: include/config/kernel.release
Linus Torvalds's avatar
Linus Torvalds committed
816
ifneq ($(KBUILD_SRC),)
817
	@$(kecho) '  Using $(srctree) as source for kernel'
818
	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek's avatar
Michal Marek committed
819
820
		echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
		echo >&2 "  in the '$(srctree)' directory.";\
Linus Torvalds's avatar
Linus Torvalds committed
821
822
823
824
		/bin/false; \
	fi;
endif

825
# prepare2 creates a makefile if using a separate output directory
Sam Ravnborg's avatar
Sam Ravnborg committed
826
prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds's avatar
Linus Torvalds committed
827

David Howells's avatar
David Howells committed
828
prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
Sam Ravnborg's avatar
Sam Ravnborg committed
829
                   include/config/auto.conf
Sam Ravnborg's avatar
Sam Ravnborg committed
830
	$(cmd_crmodverdir)
Linus Torvalds's avatar
Linus Torvalds committed
831

832
archprepare: archheaders archscripts prepare1 scripts_basic
833
834

prepare0: archprepare FORCE
835
	$(Q)$(MAKE) $(build)=.
836

Linus Torvalds's avatar
Linus Torvalds committed
837
# All the preparing..
838
prepare: prepare0
Linus Torvalds's avatar
Linus Torvalds committed
839
840
841
842
843
844
845
846

# 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
847
848
849
850
851
852
853
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
854
855

define filechk_version.h
Jesper Juhl's avatar
Jesper Juhl committed
856
857
	(echo \#define LINUX_VERSION_CODE $(shell                         \
	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg's avatar
Sam Ravnborg committed
858
	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
Linus Torvalds's avatar
Linus Torvalds committed
859
860
endef

David Howells's avatar
David Howells committed
861
$(version_h): $(srctree)/Makefile FORCE
Linus Torvalds's avatar
Linus Torvalds committed
862
863
	$(call filechk,version.h)

864
include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg's avatar
Sam Ravnborg committed
865
866
	$(call filechk,utsrelease.h)

867
868
PHONY += headerdep
headerdep:
869
870
	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
871

Linus Torvalds's avatar
Linus Torvalds committed
872
873
# ---------------------------------------------------------------------------

874
PHONY += depend dep
Linus Torvalds's avatar
Linus Torvalds committed
875
876
877
depend dep:
	@echo '*** Warning: make $@ is unnecessary now.'

878
879
880
881
882
883
884
885
886
887
# ---------------------------------------------------------------------------
# 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

888
889
890
# ---------------------------------------------------------------------------
# Kernel headers

891
892
#Default location for installed headers
export INSTALL_HDR_PATH = $(objtree)/usr
893

894
hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
895
896
897

# 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)
898

899
900
901
PHONY += archheaders
archheaders:

902
903
904
PHONY += archscripts
archscripts:

905
PHONY += __headers
David Howells's avatar
David Howells committed
906
__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
907
	$(Q)$(MAKE) $(build)=scripts build_unifdef
908
909

PHONY += headers_install_all
910
911
headers_install_all:
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
912

913
PHONY += headers_install
914
headers_install: __headers
915
916
917
918
	$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
	  $(error Headers not exportable for the $(SRCARCH) architecture))
	$(Q)$(MAKE) $(hdr-inst)=include/uapi
	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
919

920
921
PHONY += headers_check_all
headers_check_all: headers_install_all
922
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
923

924
925
PHONY += headers_check
headers_check: headers_install
926
927
	$(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
928

Linus Torvalds's avatar
Linus Torvalds committed
929
930
931
932
933
# ---------------------------------------------------------------------------
# Modules

ifdef CONFIG_MODULES

934
# By default, build modules as well
Linus Torvalds's avatar
Linus Torvalds committed
935

936
all: modules
Linus Torvalds's avatar
Linus Torvalds committed
937
938

#	Build modules
Tejun Heo's avatar
Tejun Heo committed
939
940
941
942
#
#	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
943

944
PHONY += modules
945
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo's avatar
Tejun Heo committed
946
	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
947
	@$(kecho) '  Building modules, stage 2.';
Sam Ravnborg's avatar
Sam Ravnborg committed
948
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
949
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds's avatar
Linus Torvalds committed
950

951
952
953
modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin

954
%/modules.builtin: include/config/auto.conf
955
956
	$(Q)$(MAKE) $(modbuiltin)=$*

Linus Torvalds's avatar
Linus Torvalds committed
957
958

# Target to prepare building external modules
959
PHONY += modules_prepare
960
modules_prepare: prepare scripts
Linus Torvalds's avatar
Linus Torvalds committed
961
962

# Target to install modules
963
PHONY += modules_install
Linus Torvalds's avatar
Linus Torvalds committed
964
965
modules_install: _modinst_ _modinst_post

966
PHONY += _modinst_
967
_modinst_:
Linus Torvalds's avatar
Linus Torvalds committed
968
969
970
971
972
973
974
975
	@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
976
	@cp -f $(objtree)/modules.order $(MODLIB)/
977
	@cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborg's avatar
Sam Ravnborg committed
978
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds's avatar
Linus Torvalds committed
979

980
# This depmod is only for convenience to give the initial
Linus Torvalds's avatar
Linus Torvalds committed
981
982
# boot a modules.dep even before / is mounted read-write.  However the
# boot script depmod is the master version.
983
PHONY += _modinst_post
984
_modinst_post: _modinst_
985
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
986
	$(call cmd,depmod)
Linus Torvalds's avatar
Linus Torvalds committed
987

988
989
990
991
992
993
ifeq ($(CONFIG_MODULE_SIG), y)
PHONY += modules_sign
modules_sign:
	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
endif

Linus Torvalds's avatar
Linus Torvalds committed
994
995
996
997
998
999
else # CONFIG_MODULES

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

modules modules_install: FORCE
Michal Marek's avatar
Michal Marek committed
1000
1001
1002
1003
1004
	@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
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
	@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
1020
1021
MRPROPER_DIRS  += include/config usr/include include/generated          \
                  arch/*/include/generated
David Howells's avatar
David Howells committed
1022
MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1023
1024
1025
1026
		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
		  signing_key.priv signing_key.x509 x509.genkey		\
		  extra_certificates signing_key.x509.keyid		\
		  signing_key.x509.signer
Linus Torvalds's avatar
Linus Torvalds committed
1027
1028
1029
1030
1031

# clean - Delete most, but leave enough to build external modules
#
clean: rm-dirs  := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
1032
clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds's avatar
Linus Torvalds committed
1033

1034
PHONY += $(clean-dirs) clean archclean vmlinuxclean
Linus Torvalds's avatar
Linus Torvalds committed
1035
1036
1037
$(clean-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)

1038
1039
1040
1041
vmlinuxclean:
	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean

clean: archclean vmlinuxclean
Linus Torvalds's avatar
Linus Torvalds committed
1042
1043
1044
1045
1046
1047
1048

# 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)

1049
PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds's avatar
Linus Torvalds committed
1050
1051
1052
1053
1054
1055
1056
1057
1058
$(mrproper-dirs):
	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)

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

# distclean
#
1059
PHONY += distclean
Linus Torvalds's avatar
Linus Torvalds committed
1060
1061
1062

distclean: mrproper
	@find $(srctree) $(RCS_FIND_IGNORE) \
1063
		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds's avatar
Linus Torvalds committed
1064
		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1065
		-o -name '.*.rej' \
Linus Torvalds's avatar
Linus Torvalds committed
1066
1067
1068
1069
1070
1071
1072
1073
1074
		-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
		-type f -print | xargs rm -f


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

1075
1076
%src-pkg: FORCE
	$(Q)$(MAKE) $(build)=$(package-dir) $@
1077
%pkg: include/config/kernel.release FORCE
1078
	$(Q)$(MAKE) $(build)=$(package-dir) $@
1079
rpm: include/config/kernel.release FORCE
1080
	$(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds's avatar
Linus Torvalds committed
1081
1082
1083
1084
1085


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

1086
boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds's avatar
Linus Torvalds committed
1087
boards := $(notdir $(boards))
1088
1089
board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds's avatar
Linus Torvalds committed
1090
1091
1092

help:
	@echo  'Cleaning targets:'
1093
	@echo  '  clean		  - Remove most generated files but keep the config and'
1094
	@echo  '                    enough build support to build external modules'
1095
	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1096
	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
Linus Torvalds's avatar
Linus Torvalds committed
1097
1098
1099
1100
1101
1102
1103
1104
	@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'
1105
	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1106
1107
	@echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
	@echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds's avatar
Linus Torvalds committed
1108
	@echo  '  dir/            - Build all files in dir and below'
1109
1110
1111
	@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))'
1112
	@echo  '  dir/file.ko     - Build module including final link'
1113
	@echo  '  modules_prepare - Set up for building external modules'
Linus Torvalds's avatar
Linus Torvalds committed
1114
1115
	@echo  '  tags/TAGS	  - Generate tags file for editors'
	@echo  '  cscope	  - Generate cscope index'
1116
	@echo  '  gtags           - Generate GNU GLOBAL index'
1117
	@echo  '  kernelrelease	  - Output the release version string'
1118
	@echo  '  kernelversion	  - Output the version stored in Makefile'
1119
	@echo  '  image_name	  - Output the image name'
1120
	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1121
	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1122
	 echo  ''
Linus Torvalds's avatar
Linus Torvalds committed
1123
1124
1125
	@echo  'Static analysers'
	@echo  '  checkstack      - Generate a list of stack hogs'
	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1126
	@echo  '  versioncheck    - Sanity check on version.h usage'
1127
	@echo  '  includecheck    - Check for duplicate included header files'
1128
	@echo  '  export_report   - List the usages of all exported symbols'
1129
	@echo  '  headers_check   - Sanity check on exported headers'
1130
1131
1132
	@echo  '  headerdep       - Detect inclusion cycles in headers'