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[/] [test_project/] [trunk/] [linux_sd_driver/] [Makefile] - Blame information for rev 82

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Line No. Rev Author Line
1 62 marcus.erl
VERSION = 2
2
PATCHLEVEL = 6
3
SUBLEVEL = 24
4
EXTRAVERSION =
5
NAME = Arr Matey! A Hairy Bilge Rat!
6
 
7
# *DOCUMENTATION*
8
# To see a list of typical targets execute "make help"
9
# More info can be located in ./README
10
# Comments in this file are targeted only to the developer, do not
11
# expect to learn how to build the kernel reading this file.
12
 
13
# Do not:
14
# o  use make's built-in rules and variables
15
#    (this increases performance and avoids hard-to-debug behaviour);
16
# o  print "Entering directory ...";
17
MAKEFLAGS += -rR --no-print-directory
18
 
19
# We are using a recursive build, so we need to do a little thinking
20
# to get the ordering right.
21
#
22
# Most importantly: sub-Makefiles should only ever modify files in
23
# their own directory. If in some directory we have a dependency on
24
# a file in another dir (which doesn't happen often, but it's often
25
# unavoidable when linking the built-in.o targets which finally
26
# turn into vmlinux), we will call a sub make in that other dir, and
27
# after that we are sure that everything which is in that other dir
28
# is now up to date.
29
#
30
# The only cases where we need to modify files which have global
31
# effects are thus separated out and done before the recursive
32
# descending is started. They are now explicitly listed as the
33
# prepare rule.
34
 
35
# To put more focus on warnings, be less verbose as default
36
# Use 'make V=1' to see the full commands
37
 
38
ifdef V
39
  ifeq ("$(origin V)", "command line")
40
    KBUILD_VERBOSE = $(V)
41
  endif
42
endif
43
ifndef KBUILD_VERBOSE
44
  KBUILD_VERBOSE = 0
45
endif
46
 
47
# Call a source code checker (by default, "sparse") as part of the
48
# C compilation.
49
#
50
# Use 'make C=1' to enable checking of only re-compiled files.
51
# Use 'make C=2' to enable checking of *all* source files, regardless
52
# of whether they are re-compiled or not.
53
#
54
# See the file "Documentation/sparse.txt" for more details, including
55
# where to get the "sparse" utility.
56
 
57
ifdef C
58
  ifeq ("$(origin C)", "command line")
59
    KBUILD_CHECKSRC = $(C)
60
  endif
61
endif
62
ifndef KBUILD_CHECKSRC
63
  KBUILD_CHECKSRC = 0
64
endif
65
 
66
# Use make M=dir to specify directory of external module to build
67
# Old syntax make ... SUBDIRS=$PWD is still supported
68
# Setting the environment variable KBUILD_EXTMOD take precedence
69
ifdef SUBDIRS
70
  KBUILD_EXTMOD ?= $(SUBDIRS)
71
endif
72
ifdef M
73
  ifeq ("$(origin M)", "command line")
74
    KBUILD_EXTMOD := $(M)
75
  endif
76
endif
77
 
78
 
79
# kbuild supports saving output files in a separate directory.
80
# To locate output files in a separate directory two syntaxes are supported.
81
# In both cases the working directory must be the root of the kernel src.
82
# 1) O=
83
# Use "make O=dir/to/store/output/files/"
84
#
85
# 2) Set KBUILD_OUTPUT
86
# Set the environment variable KBUILD_OUTPUT to point to the directory
87
# where the output files shall be placed.
88
# export KBUILD_OUTPUT=dir/to/store/output/files/
89
# make
90
#
91
# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92
# variable.
93
 
94
 
95
# KBUILD_SRC is set on invocation of make in OBJ directory
96
# KBUILD_SRC is not intended to be used by the regular user (for now)
97
ifeq ($(KBUILD_SRC),)
98
 
99
# OK, Make called in directory where kernel src resides
100
# Do we want to locate output files in a separate directory?
101
ifdef O
102
  ifeq ("$(origin O)", "command line")
103
    KBUILD_OUTPUT := $(O)
104
  endif
105
endif
106
 
107
# That's our default target when none is given on the command line
108
PHONY := _all
109
_all:
110
 
111
# Cancel implicit rules on top Makefile
112
$(CURDIR)/Makefile Makefile: ;
113
 
114
ifneq ($(KBUILD_OUTPUT),)
115
# Invoke a second make in the output directory, passing relevant variables
116
# check that the output directory actually exists
117
saved-output := $(KBUILD_OUTPUT)
118
KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
119
$(if $(KBUILD_OUTPUT),, \
120
     $(error output directory "$(saved-output)" does not exist))
121
 
122
PHONY += $(MAKECMDGOALS) sub-make
123
 
124
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
125
        $(Q)@:
126
 
127
sub-make: FORCE
128
        $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
129
        KBUILD_SRC=$(CURDIR) \
130
        KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
131
        $(filter-out _all sub-make,$(MAKECMDGOALS))
132
 
133
# Leave processing to above invocation of make
134
skip-makefile := 1
135
endif # ifneq ($(KBUILD_OUTPUT),)
136
endif # ifeq ($(KBUILD_SRC),)
137
 
138
# We process the rest of the Makefile if this is the final invocation of make
139
ifeq ($(skip-makefile),)
140
 
141
# If building an external module we do not care about the all: rule
142
# but instead _all depend on modules
143
PHONY += all
144
ifeq ($(KBUILD_EXTMOD),)
145
_all: all
146
else
147
_all: modules
148
endif
149
 
150
srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
151
TOPDIR          := $(srctree)
152
# FIXME - TOPDIR is obsolete, use srctree/objtree
153
objtree         := $(CURDIR)
154
src             := $(srctree)
155
obj             := $(objtree)
156
 
157
VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
158
 
159
export srctree objtree VPATH TOPDIR
160
 
161
 
162
# SUBARCH tells the usermode build what the underlying arch is.  That is set
163
# first, and if a usermode build is happening, the "ARCH=um" on the command
164
# line overrides the setting of ARCH below.  If a native build is happening,
165
# then ARCH is assigned, getting whatever value it gets normally, and
166
# SUBARCH is subsequently ignored.
167
 
168
SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169
                                  -e s/arm.*/arm/ -e s/sa110/arm/ \
170
                                  -e s/s390x/s390/ -e s/parisc64/parisc/ \
171
                                  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
172
                                  -e s/sh[234].*/sh/ )
173
 
174
# Cross compiling and selecting different set of gcc/bin-utils
175
# ---------------------------------------------------------------------------
176
#
177
# When performing cross compilation for other architectures ARCH shall be set
178
# to the target architecture. (See arch/* for the possibilities).
179
# ARCH can be set during invocation of make:
180
# make ARCH=ia64
181
# Another way is to have ARCH set in the environment.
182
# The default ARCH is the host where make is executed.
183
 
184
# CROSS_COMPILE specify the prefix used for all executables used
185
# during compilation. Only gcc and related bin-utils executables
186
# are prefixed with $(CROSS_COMPILE).
187
# CROSS_COMPILE can be set on the command line
188
# make CROSS_COMPILE=ia64-linux-
189
# Alternatively CROSS_COMPILE can be set in the environment.
190
# Default value for CROSS_COMPILE is not to prefix executables
191
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
192
 
193
#ARCH           ?= $(SUBARCH)
194
#CROSS_COMPILE  ?=
195
ARCH            = or32
196
CROSS_COMPILE   = or32-elf-
197
 
198
 
199
# Architecture as present in compile.h
200
UTS_MACHINE     := $(ARCH)
201
SRCARCH         := $(ARCH)
202
 
203
# Additional ARCH settings for x86
204
ifeq ($(ARCH),i386)
205
        SRCARCH := x86
206
endif
207
ifeq ($(ARCH),x86_64)
208
        SRCARCH := x86
209
endif
210
 
211
KCONFIG_CONFIG  ?= .config
212
 
213
# SHELL used by kbuild
214
CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
215
          else if [ -x /bin/bash ]; then echo /bin/bash; \
216
          else echo sh; fi ; fi)
217
 
218
HOSTCC       = gcc
219
HOSTCXX      = g++
220 82 tac2
HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
221
HOSTCXXFLAGS = -O2
222 62 marcus.erl
 
223
# Decide whether to build built-in, modular, or both.
224
# Normally, just do built-in.
225
 
226
KBUILD_MODULES :=
227
KBUILD_BUILTIN := 1
228
 
229
#       If we have only "make modules", don't compile built-in objects.
230
#       When we're building modules with modversions, we need to consider
231
#       the built-in objects during the descend as well, in order to
232
#       make sure the checksums are up to date before we record them.
233
 
234
ifeq ($(MAKECMDGOALS),modules)
235
  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
236
endif
237
 
238
#       If we have "make  modules", compile modules
239
#       in addition to whatever we do anyway.
240
#       Just "make" or "make all" shall build modules as well
241
 
242
ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
243
  KBUILD_MODULES := 1
244
endif
245
 
246
ifeq ($(MAKECMDGOALS),)
247
  KBUILD_MODULES := 1
248
endif
249
 
250
export KBUILD_MODULES KBUILD_BUILTIN
251
export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
252
 
253
# Beautify output
254
# ---------------------------------------------------------------------------
255
#
256
# Normally, we echo the whole command before executing it. By making
257
# that echo $($(quiet)$(cmd)), we now have the possibility to set
258
# $(quiet) to choose other forms of output instead, e.g.
259
#
260
#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
261
#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
262
#
263
# If $(quiet) is empty, the whole command will be printed.
264
# If it is set to "quiet_", only the short version will be printed.
265
# If it is set to "silent_", nothing will be printed at all, since
266
# the variable $(silent_cmd_cc_o_c) doesn't exist.
267
#
268
# A simple variant is to prefix commands with $(Q) - that's useful
269
# for commands that shall be hidden in non-verbose mode.
270
#
271
#       $(Q)ln $@ :<
272
#
273
# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
274
# If KBUILD_VERBOSE equals 1 then the above command is displayed.
275
 
276
ifeq ($(KBUILD_VERBOSE),1)
277
  quiet =
278
  Q =
279
else
280
  quiet=quiet_
281
  Q = @
282
endif
283
 
284
# If the user is running make -s (silent mode), suppress echoing of
285
# commands
286
 
287
ifneq ($(findstring s,$(MAKEFLAGS)),)
288
  quiet=silent_
289
endif
290
 
291
export quiet Q KBUILD_VERBOSE
292
 
293
 
294
# Look for make include files relative to root of kernel src
295
MAKEFLAGS += --include-dir=$(srctree)
296
 
297
# We need some generic definitions (do not try to remake the file).
298
$(srctree)/scripts/Kbuild.include: ;
299
include $(srctree)/scripts/Kbuild.include
300
 
301
# Make variables (CC, etc...)
302
 
303
AS              = $(CROSS_COMPILE)as
304
LD              = $(CROSS_COMPILE)ld
305
CC              = $(CROSS_COMPILE)gcc
306
CPP             = $(CC) -E
307
AR              = $(CROSS_COMPILE)ar
308
NM              = $(CROSS_COMPILE)nm
309
STRIP           = $(CROSS_COMPILE)strip
310
OBJCOPY         = $(CROSS_COMPILE)objcopy
311
OBJDUMP         = $(CROSS_COMPILE)objdump
312
AWK             = awk
313
GENKSYMS        = scripts/genksyms/genksyms
314
DEPMOD          = /sbin/depmod
315
KALLSYMS        = scripts/kallsyms
316
PERL            = perl
317
CHECK           = sparse
318
 
319
CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
320
MODFLAGS        = -DMODULE
321
CFLAGS_MODULE   = $(MODFLAGS)
322
AFLAGS_MODULE   = $(MODFLAGS)
323
LDFLAGS_MODULE  =
324
CFLAGS_KERNEL   =
325
AFLAGS_KERNEL   =
326
 
327
 
328
# Use LINUXINCLUDE when you must reference the include/ directory.
329
# Needed to be compatible with the O= option
330
LINUXINCLUDE    := -Iinclude \
331
                   $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
332
                   -include include/linux/autoconf.h
333
 
334
KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
335
 
336
KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
337
                   -fno-strict-aliasing -fno-common \
338
                   -Werror-implicit-function-declaration
339
KBUILD_AFLAGS   := -D__ASSEMBLY__
340
 
341
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
342
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
343
KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
344
 
345
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
346
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
347
export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
348
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
349
 
350
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
351
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
352
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
353
 
354
# When compiling out-of-tree modules, put MODVERDIR in the module
355
# tree rather than in the kernel tree. The kernel tree might
356
# even be read-only.
357
export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
358
 
359
# Files to ignore in find ... statements
360
 
361
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
362
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
363
 
364
# ===========================================================================
365
# Rules shared between *config targets and build targets
366
 
367
# Basic helpers built in scripts/
368
PHONY += scripts_basic
369
scripts_basic:
370
        $(Q)$(MAKE) $(build)=scripts/basic
371
 
372
# To avoid any implicit rule to kick in, define an empty command.
373
scripts/basic/%: scripts_basic ;
374
 
375
PHONY += outputmakefile
376
# outputmakefile generates a Makefile in the output directory, if using a
377
# separate output directory. This allows convenient use of make in the
378
# output directory.
379
outputmakefile:
380
ifneq ($(KBUILD_SRC),)
381
        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
382
            $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
383
endif
384
 
385
# To make sure we do not include .config for any of the *config targets
386
# catch them early, and hand them over to scripts/kconfig/Makefile
387
# It is allowed to specify more targets when calling make, including
388
# mixing *config targets and build targets.
389
# For example 'make oldconfig all'.
390
# Detect when mixed targets is specified, and make a second invocation
391
# of make so .config is not included in this case either (for *config).
392
 
393
no-dot-config-targets := clean mrproper distclean \
394
                         cscope TAGS tags help %docs check% \
395
                         include/linux/version.h headers_% \
396
                         kernelrelease kernelversion
397
 
398
config-targets := 0
399
mixed-targets  := 0
400
dot-config     := 1
401
 
402
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
403
        ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
404
                dot-config := 0
405
        endif
406
endif
407
 
408
ifeq ($(KBUILD_EXTMOD),)
409
        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
410
                config-targets := 1
411
                ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
412
                        mixed-targets := 1
413
                endif
414
        endif
415
endif
416
 
417
ifeq ($(mixed-targets),1)
418
# ===========================================================================
419
# We're called with mixed targets (*config and build targets).
420
# Handle them one by one.
421
 
422
%:: FORCE
423
        $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
424
 
425
else
426
ifeq ($(config-targets),1)
427
# ===========================================================================
428
# *config targets only - make sure prerequisites are updated, and descend
429
# in scripts/kconfig to make the *config target
430
 
431
# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
432
# KBUILD_DEFCONFIG may point out an alternative default configuration
433
# used for 'make defconfig'
434
include $(srctree)/arch/$(SRCARCH)/Makefile
435
export KBUILD_DEFCONFIG
436
 
437
config %config: scripts_basic outputmakefile FORCE
438
        $(Q)mkdir -p include/linux include/config
439
        $(Q)$(MAKE) $(build)=scripts/kconfig $@
440
 
441
else
442
# ===========================================================================
443
# Build targets only - this includes vmlinux, arch specific targets, clean
444
# targets and others. In general all targets except *config targets.
445
 
446
ifeq ($(KBUILD_EXTMOD),)
447
# Additional helpers built in scripts/
448
# Carefully list dependencies so we do not try to build scripts twice
449
# in parallel
450
PHONY += scripts
451
scripts: scripts_basic include/config/auto.conf
452
        $(Q)$(MAKE) $(build)=$(@)
453
 
454
# Objects we will link into vmlinux / subdirs we need to visit
455
init-y          := init/
456
drivers-y       := drivers/ sound/
457
net-y           := net/
458
libs-y          := lib/
459
core-y          := usr/
460
endif # KBUILD_EXTMOD
461
 
462
ifeq ($(dot-config),1)
463
# Read in config
464
-include include/config/auto.conf
465
 
466
ifeq ($(KBUILD_EXTMOD),)
467
# Read in dependencies to all Kconfig* files, make sure to run
468
# oldconfig if changes are detected.
469
-include include/config/auto.conf.cmd
470
 
471
# To avoid any implicit rule to kick in, define an empty command
472
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
473
 
474
# If .config is newer than include/config/auto.conf, someone tinkered
475
# with it and forgot to run make oldconfig.
476
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
477
# we execute the config step to be sure to catch updated Kconfig files
478
include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
479
        $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
480
else
481
# external modules needs include/linux/autoconf.h and include/config/auto.conf
482
# but do not care if they are up-to-date. Use auto.conf to trigger the test
483
PHONY += include/config/auto.conf
484
 
485
include/config/auto.conf:
486
        $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
487
        echo;                                                           \
488
        echo "  ERROR: Kernel configuration is invalid.";               \
489
        echo "         include/linux/autoconf.h or $@ are missing.";    \
490
        echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";    \
491
        echo;                                                           \
492
        /bin/false)
493
 
494
endif # KBUILD_EXTMOD
495
 
496
else
497
# Dummy target needed, because used as prerequisite
498
include/config/auto.conf: ;
499
endif # $(dot-config)
500
 
501
# The all: target is the default when no target is given on the
502
# command line.
503
# This allow a user to issue only 'make' to build a kernel including modules
504
# Defaults vmlinux but it is usually overridden in the arch makefile
505
all: vmlinux
506
 
507
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
508
KBUILD_CFLAGS   += -Os
509
else
510
KBUILD_CFLAGS   += -O2
511
endif
512
 
513
include $(srctree)/arch/$(SRCARCH)/Makefile
514
 
515
ifdef CONFIG_FRAME_POINTER
516
KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
517
else
518
KBUILD_CFLAGS   += -fomit-frame-pointer
519
endif
520
 
521
ifdef CONFIG_DEBUG_INFO
522
KBUILD_CFLAGS   += -g
523
KBUILD_AFLAGS   += -gdwarf-2
524
endif
525
 
526
# Force gcc to behave correct even for buggy distributions
527
KBUILD_CFLAGS         += $(call cc-option, -fno-stack-protector)
528
 
529
# arch Makefile may override CC so keep this after arch Makefile is included
530
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
531
CHECKFLAGS     += $(NOSTDINC_FLAGS)
532
 
533
# warn about C99 declaration after statement
534
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
535
 
536
# disable pointer signed / unsigned warnings in gcc 4.0
537
KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
538
 
539
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
540
# But warn user when we do so
541
warn-assign = \
542
$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
543
 
544
ifneq ($(KCPPFLAGS),)
545
        $(call warn-assign,CPPFLAGS)
546
        KBUILD_CPPFLAGS += $(KCPPFLAGS)
547
endif
548
ifneq ($(KAFLAGS),)
549
        $(call warn-assign,AFLAGS)
550
        KBUILD_AFLAGS += $(KAFLAGS)
551
endif
552
ifneq ($(KCFLAGS),)
553
        $(call warn-assign,CFLAGS)
554
        KBUILD_CFLAGS += $(KCFLAGS)
555
endif
556
 
557
# Use --build-id when available.
558
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
559
                              $(call ld-option, -Wl$(comma)--build-id,))
560
LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
561
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
562
 
563
# Default kernel image to build when no specific target is given.
564
# KBUILD_IMAGE may be overruled on the command line or
565
# set in the environment
566
# Also any assignments in arch/$(ARCH)/Makefile take precedence over
567
# this default value
568
export KBUILD_IMAGE ?= vmlinux
569
 
570
#
571
# INSTALL_PATH specifies where to place the updated kernel and system map
572
# images. Default is /boot, but you can set it to other values
573
export  INSTALL_PATH ?= /boot
574
 
575
#
576
# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
577
# relocations required by build roots.  This is not defined in the
578
# makefile but the argument can be passed to make if needed.
579
#
580
 
581
MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
582
export MODLIB
583
 
584
#
585
#  INSTALL_MOD_STRIP, if defined, will cause modules to be
586
#  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
587
#  the default option --strip-debug will be used.  Otherwise,
588
#  INSTALL_MOD_STRIP will used as the options to the strip command.
589
 
590
ifdef INSTALL_MOD_STRIP
591
ifeq ($(INSTALL_MOD_STRIP),1)
592
mod_strip_cmd = $(STRIP) --strip-debug
593
else
594
mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
595
endif # INSTALL_MOD_STRIP=1
596
else
597
mod_strip_cmd = true
598
endif # INSTALL_MOD_STRIP
599
export mod_strip_cmd
600
 
601
 
602
ifeq ($(KBUILD_EXTMOD),)
603
core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
604
 
605
vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
606
                     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
607
                     $(net-y) $(net-m) $(libs-y) $(libs-m)))
608
 
609
vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
610
                     $(init-n) $(init-) \
611
                     $(core-n) $(core-) $(drivers-n) $(drivers-) \
612
                     $(net-n)  $(net-)  $(libs-n)    $(libs-))))
613
 
614
init-y          := $(patsubst %/, %/built-in.o, $(init-y))
615
core-y          := $(patsubst %/, %/built-in.o, $(core-y))
616
drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
617
net-y           := $(patsubst %/, %/built-in.o, $(net-y))
618
libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
619
libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
620
libs-y          := $(libs-y1) $(libs-y2)
621
 
622
# Build vmlinux
623
# ---------------------------------------------------------------------------
624
# vmlinux is built from the objects selected by $(vmlinux-init) and
625
# $(vmlinux-main). Most are built-in.o files from top-level directories
626
# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
627
# Ordering when linking is important, and $(vmlinux-init) must be first.
628
#
629
# vmlinux
630
#   ^
631
#   |
632
#   +-< $(vmlinux-init)
633
#   |   +--< init/version.o + more
634
#   |
635
#   +--< $(vmlinux-main)
636
#   |    +--< driver/built-in.o mm/built-in.o + more
637
#   |
638
#   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
639
#
640
# vmlinux version (uname -v) cannot be updated during normal
641
# descending-into-subdirs phase since we do not yet know if we need to
642
# update vmlinux.
643
# Therefore this step is delayed until just before final link of vmlinux -
644
# except in the kallsyms case where it is done just before adding the
645
# symbols to the kernel.
646
#
647
# System.map is generated to document addresses of all kernel symbols
648
 
649
vmlinux-init := $(head-y) $(init-y)
650
vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
651
vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
652
vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
653
export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
654
 
655
# Rule to link vmlinux - also used during CONFIG_KALLSYMS
656
# May be overridden by arch/$(ARCH)/Makefile
657
quiet_cmd_vmlinux__ ?= LD      $@
658
      cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
659
      -T $(vmlinux-lds) $(vmlinux-init)                          \
660
      --start-group $(vmlinux-main) --end-group                  \
661
      $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
662
 
663
# Generate new vmlinux version
664
quiet_cmd_vmlinux_version = GEN     .version
665
      cmd_vmlinux_version = set -e;                     \
666
        if [ ! -r .version ]; then                      \
667
          rm -f .version;                               \
668
          echo 1 >.version;                             \
669
        else                                            \
670
          mv .version .old_version;                     \
671
          expr 0$$(cat .old_version) + 1 >.version;     \
672
        fi;                                             \
673
        $(MAKE) $(build)=init
674
 
675
# Generate System.map
676
quiet_cmd_sysmap = SYSMAP
677
      cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
678
 
679
# Link of vmlinux
680
# If CONFIG_KALLSYMS is set .version is already updated
681
# Generate System.map and verify that the content is consistent
682
# Use + in front of the vmlinux_version rule to silent warning with make -j2
683
# First command is ':' to allow us to use + in front of the rule
684
define rule_vmlinux__
685
        :
686
        $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
687
 
688
        $(call cmd,vmlinux__)
689
        $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
690
 
691
        $(Q)$(if $($(quiet)cmd_sysmap),                                      \
692
          echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
693
        $(cmd_sysmap) $@ System.map;                                         \
694
        if [ $$? -ne 0 ]; then                                               \
695
                rm -f $@;                                                    \
696
                /bin/false;                                                  \
697
        fi;
698
        $(verify_kallsyms)
699
endef
700
 
701
 
702
ifdef CONFIG_KALLSYMS
703
# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
704
# It's a three stage process:
705
# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
706
#   empty
707
#   Running kallsyms on that gives us .tmp_kallsyms1.o with
708
#   the right size - vmlinux version (uname -v) is updated during this step
709
# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
710
#   but due to the added section, some addresses have shifted.
711
#   From here, we generate a correct .tmp_kallsyms2.o
712
# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
713
# o Verify that the System.map from vmlinux matches the map from
714
#   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
715
# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
716
#   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
717
#   temporary bypass to allow the kernel to be built while the
718
#   maintainers work out what went wrong with kallsyms.
719
 
720
ifdef CONFIG_KALLSYMS_EXTRA_PASS
721
last_kallsyms := 3
722
else
723
last_kallsyms := 2
724
endif
725
 
726
kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
727
 
728
define verify_kallsyms
729
        $(Q)$(if $($(quiet)cmd_sysmap),                                      \
730
          echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
731
          $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
732
        $(Q)cmp -s System.map .tmp_System.map ||                             \
733
                (echo Inconsistent kallsyms data;                            \
734
                 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
735
                 rm .tmp_kallsyms* ; /bin/false )
736
endef
737
 
738
# Update vmlinux version before link
739
# Use + in front of this rule to silent warning about make -j1
740
# First command is ':' to allow us to use + in front of this rule
741
cmd_ksym_ld = $(cmd_vmlinux__)
742
define rule_ksym_ld
743
        :
744
        +$(call cmd,vmlinux_version)
745
        $(call cmd,vmlinux__)
746
        $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
747
endef
748
 
749
# Generate .S file with all kernel symbols
750
quiet_cmd_kallsyms = KSYM    $@
751
      cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
752
                     $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
753
 
754
.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
755
        $(call if_changed_dep,as_o_S)
756
 
757
.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
758
        $(call cmd,kallsyms)
759
 
760
# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
761
.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
762
        $(call if_changed_rule,ksym_ld)
763
 
764
.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
765
        $(call if_changed,vmlinux__)
766
 
767
.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
768
        $(call if_changed,vmlinux__)
769
 
770
# Needs to visit scripts/ before $(KALLSYMS) can be used.
771
$(KALLSYMS): scripts ;
772
 
773
# Generate some data for debugging strange kallsyms problems
774
debug_kallsyms: .tmp_map$(last_kallsyms)
775
 
776
.tmp_map%: .tmp_vmlinux% FORCE
777
        ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
778
 
779
.tmp_map3: .tmp_map2
780
 
781
.tmp_map2: .tmp_map1
782
 
783
endif # ifdef CONFIG_KALLSYMS
784
 
785
# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
786
# relevant sections renamed as per the linker script.
787
quiet_cmd_vmlinux-modpost = LD      $@
788
      cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
789
         $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
790
         $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
791
define rule_vmlinux-modpost
792
        :
793
        +$(call cmd,vmlinux-modpost)
794
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
795
        $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
796
endef
797
 
798
# vmlinux image - including updated kernel symbols
799
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
800
ifdef CONFIG_HEADERS_CHECK
801
        $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
802
endif
803
ifdef CONFIG_SAMPLES
804
        $(Q)$(MAKE) $(build)=samples
805
endif
806
        $(call vmlinux-modpost)
807
        $(call if_changed_rule,vmlinux__)
808
        $(Q)rm -f .old_version
809
        $(OBJCOPY) -O binary vmlinux vmlinux.bin
810 78 AlbertVeli
        $(OBJCOPY) -O elf32-big -g -R .text -R .rodata -R .initrd vmlinux vmlinux.reload
811 62 marcus.erl
 
812
vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
813
        $(call if_changed_rule,vmlinux-modpost)
814
 
815
# The actual objects are generated when descending,
816
# make sure no implicit rule kicks in
817
$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
818
 
819
# Handle descending into subdirectories listed in $(vmlinux-dirs)
820
# Preset locale variables to speed up the build process. Limit locale
821
# tweaks to this spot to avoid wrong language settings when running
822
# make menuconfig etc.
823
# Error messages still appears in the original language
824
 
825
PHONY += $(vmlinux-dirs)
826
$(vmlinux-dirs): prepare scripts
827
        $(Q)$(MAKE) $(build)=$@
828
 
829
# Build the kernel release string
830
#
831
# The KERNELRELEASE value built here is stored in the file
832
# include/config/kernel.release, and is used when executing several
833
# make targets, such as "make install" or "make modules_install."
834
#
835
# The eventual kernel release string consists of the following fields,
836
# shown in a hierarchical format to show how smaller parts are concatenated
837
# to form the larger and final value, with values coming from places like
838
# the Makefile, kernel config options, make command line options and/or
839
# SCM tag information.
840
#
841
#       $(KERNELVERSION)
842
#         $(VERSION)                    eg, 2
843
#         $(PATCHLEVEL)                 eg, 6
844
#         $(SUBLEVEL)                   eg, 18
845
#         $(EXTRAVERSION)               eg, -rc6
846
#       $(localver-full)
847
#         $(localver)
848
#           localversion*               (files without backups, containing '~')
849
#           $(CONFIG_LOCALVERSION)      (from kernel config setting)
850
#         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
851
#           ./scripts/setlocalversion   (SCM tag, if one exists)
852
#           $(LOCALVERSION)             (from make command line if provided)
853
#
854
#  Note how the final $(localver-auto) string is included *only* if the
855
# kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
856
# moment, only git is supported but other SCMs can edit the script
857
# scripts/setlocalversion and add the appropriate checks as needed.
858
 
859
pattern = ".*/localversion[^~]*"
860
string  = $(shell cat /dev/null \
861
           `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
862
 
863
localver = $(subst $(space),, $(string) \
864
                              $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
865
 
866
# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
867
# and if the SCM is know a tag from the SCM is appended.
868
# The appended tag is determined by the SCM used.
869
#
870
# Currently, only git is supported.
871
# Other SCMs can edit scripts/setlocalversion and add the appropriate
872
# checks as needed.
873
ifdef CONFIG_LOCALVERSION_AUTO
874
        _localver-auto = $(shell $(CONFIG_SHELL) \
875
                          $(srctree)/scripts/setlocalversion $(srctree))
876
        localver-auto  = $(LOCALVERSION)$(_localver-auto)
877
endif
878
 
879
localver-full = $(localver)$(localver-auto)
880
 
881
# Store (new) KERNELRELASE string in include/config/kernel.release
882
kernelrelease = $(KERNELVERSION)$(localver-full)
883
include/config/kernel.release: include/config/auto.conf FORCE
884
        $(Q)rm -f $@
885
        $(Q)echo $(kernelrelease) > $@
886
 
887
 
888
# Things we need to do before we recursively start building the kernel
889
# or the modules are listed in "prepare".
890
# A multi level approach is used. prepareN is processed before prepareN-1.
891
# archprepare is used in arch Makefiles and when processed asm symlink,
892
# version.h and scripts_basic is processed / created.
893
 
894
# Listed in dependency order
895
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
896
 
897
# prepare3 is used to check if we are building in a separate output directory,
898
# and if so do:
899
# 1) Check that make has not been executed in the kernel src $(srctree)
900
# 2) Create the include2 directory, used for the second asm symlink
901
prepare3: include/config/kernel.release
902
ifneq ($(KBUILD_SRC),)
903
        @echo '  Using $(srctree) as source for kernel'
904
        $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
905
                echo "  $(srctree) is not clean, please run 'make mrproper'";\
906
                echo "  in the '$(srctree)' directory.";\
907
                /bin/false; \
908
        fi;
909
        $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
910
        $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
911
endif
912
 
913
# prepare2 creates a makefile if using a separate output directory
914
prepare2: prepare3 outputmakefile
915
 
916
prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
917
                   include/asm include/config/auto.conf
918
        $(cmd_crmodverdir)
919
 
920
archprepare: prepare1 scripts_basic
921
 
922
prepare0: archprepare FORCE
923
        $(Q)$(MAKE) $(build)=.
924
        $(Q)$(MAKE) $(build)=. missing-syscalls
925
 
926
# All the preparing..
927
prepare: prepare0
928
 
929
# Leave this as default for preprocessing vmlinux.lds.S, which is now
930
# done in arch/$(ARCH)/kernel/Makefile
931
 
932
export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
933
 
934
# The asm symlink changes when $(ARCH) changes.
935
# Detect this and ask user to run make mrproper
936
 
937
include/asm: FORCE
938
        $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`;   \
939
        if [ -L include/asm ]; then                                     \
940
                if [ "$$asmlink" != "$(SRCARCH)" ]; then                \
941
                        echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
942
                        echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
943
                        exit 1;                                         \
944
                fi;                                                     \
945
        else                                                            \
946
                echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';          \
947
                if [ ! -d include ]; then                               \
948
                        mkdir -p include;                               \
949
                fi;                                                     \
950
                ln -fsn asm-$(SRCARCH) $@;                              \
951
        fi
952
 
953
# Generate some files
954
# ---------------------------------------------------------------------------
955
 
956
# KERNELRELEASE can change from a few different places, meaning version.h
957
# needs to be updated, so this check is forced on all builds
958
 
959
uts_len := 64
960
define filechk_utsrelease.h
961
        if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
962
          echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
963
          exit 1;                                                         \
964
        fi;                                                               \
965
        (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
966
endef
967
 
968
define filechk_version.h
969
        (echo \#define LINUX_VERSION_CODE $(shell                             \
970
        expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
971
        echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
972
endef
973
 
974
include/linux/version.h: $(srctree)/Makefile FORCE
975
        $(call filechk,version.h)
976
 
977
include/linux/utsrelease.h: include/config/kernel.release FORCE
978
        $(call filechk,utsrelease.h)
979
 
980
# ---------------------------------------------------------------------------
981
 
982
PHONY += depend dep
983
depend dep:
984
        @echo '*** Warning: make $@ is unnecessary now.'
985
 
986
# ---------------------------------------------------------------------------
987
# Kernel headers
988
INSTALL_HDR_PATH=$(objtree)/usr
989
export INSTALL_HDR_PATH
990
 
991
HDRFILTER=generic i386 x86_64
992
HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
993
 
994
PHONY += headers_install_all
995
headers_install_all: include/linux/version.h scripts_basic FORCE
996
        $(Q)$(MAKE) $(build)=scripts scripts/unifdef
997
        $(Q)for arch in $(HDRARCHES); do \
998
         $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
999
         done
1000
 
1001
PHONY += headers_install
1002
headers_install: include/linux/version.h scripts_basic FORCE
1003
        @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1004
          echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
1005
          exit 1 ; fi
1006
        $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1007
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
1008
 
1009
PHONY += headers_check_all
1010
headers_check_all: headers_install_all
1011
        $(Q)for arch in $(HDRARCHES); do \
1012
         $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1013
         done
1014
 
1015
PHONY += headers_check
1016
headers_check: headers_install
1017
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
1018
 
1019
# ---------------------------------------------------------------------------
1020
# Modules
1021
 
1022
ifdef CONFIG_MODULES
1023
 
1024
# By default, build modules as well
1025
 
1026
all: modules
1027
 
1028
#       Build modules
1029
 
1030
PHONY += modules
1031
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1032
        @echo '  Building modules, stage 2.';
1033
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1034
 
1035
 
1036
# Target to prepare building external modules
1037
PHONY += modules_prepare
1038
modules_prepare: prepare scripts
1039
 
1040
# Target to install modules
1041
PHONY += modules_install
1042
modules_install: _modinst_ _modinst_post
1043
 
1044
PHONY += _modinst_
1045
_modinst_:
1046
        @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1047
                echo "Warning: you may need to install module-init-tools"; \
1048
                echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1049
                sleep 1; \
1050
        fi
1051
        @rm -rf $(MODLIB)/kernel
1052
        @rm -f $(MODLIB)/source
1053
        @mkdir -p $(MODLIB)/kernel
1054
        @ln -s $(srctree) $(MODLIB)/source
1055
        @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1056
                rm -f $(MODLIB)/build ; \
1057
                ln -s $(objtree) $(MODLIB)/build ; \
1058
        fi
1059
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1060
 
1061
# This depmod is only for convenience to give the initial
1062
# boot a modules.dep even before / is mounted read-write.  However the
1063
# boot script depmod is the master version.
1064
PHONY += _modinst_post
1065
_modinst_post: _modinst_
1066
        $(call cmd,depmod)
1067
 
1068
else # CONFIG_MODULES
1069
 
1070
# Modules not configured
1071
# ---------------------------------------------------------------------------
1072
 
1073
modules modules_install: FORCE
1074
        @echo
1075
        @echo "The present kernel configuration has modules disabled."
1076
        @echo "Type 'make config' and enable loadable module support."
1077
        @echo "Then build a kernel with module support enabled."
1078
        @echo
1079
        @exit 1
1080
 
1081
endif # CONFIG_MODULES
1082
 
1083
###
1084
# Cleaning is done on three levels.
1085
# make clean     Delete most generated files
1086
#                Leave enough to build external modules
1087
# make mrproper  Delete the current configuration, and all generated files
1088
# make distclean Remove editor backup files, patch leftover files and the like
1089
 
1090
# Directories & files removed with 'make clean'
1091
CLEAN_DIRS  += $(MODVERDIR)
1092
CLEAN_FILES +=  vmlinux System.map \
1093
                .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1094
 
1095
# Directories & files removed with 'make mrproper'
1096
MRPROPER_DIRS  += include/config include2 usr/include
1097
MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1098
                  include/linux/autoconf.h include/linux/version.h      \
1099
                  include/linux/utsrelease.h                            \
1100
                  Module.symvers tags TAGS cscope*
1101
 
1102
# clean - Delete most, but leave enough to build external modules
1103
#
1104
clean: rm-dirs  := $(CLEAN_DIRS)
1105
clean: rm-files := $(CLEAN_FILES)
1106
clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1107
 
1108
PHONY += $(clean-dirs) clean archclean
1109
$(clean-dirs):
1110
        $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1111
 
1112
clean: archclean $(clean-dirs)
1113
        $(call cmd,rmdirs)
1114
        $(call cmd,rmfiles)
1115
        @find . $(RCS_FIND_IGNORE) \
1116
                \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1117
                -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1118
                -o -name '*.symtypes' \) \
1119
                -type f -print | xargs rm -f
1120
 
1121
# mrproper - Delete all generated files, including .config
1122
#
1123
mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1124
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1125
mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1126
 
1127
PHONY += $(mrproper-dirs) mrproper archmrproper
1128
$(mrproper-dirs):
1129
        $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1130
 
1131
mrproper: clean archmrproper $(mrproper-dirs)
1132
        $(call cmd,rmdirs)
1133
        $(call cmd,rmfiles)
1134
 
1135
# distclean
1136
#
1137
PHONY += distclean
1138
 
1139
distclean: mrproper
1140
        @find $(srctree) $(RCS_FIND_IGNORE) \
1141
                \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1142
                -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1143
                -o -name '.*.rej' -o -size 0 \
1144
                -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1145
                -type f -print | xargs rm -f
1146
 
1147
 
1148
# Packaging of the kernel to various formats
1149
# ---------------------------------------------------------------------------
1150
# rpm target kept for backward compatibility
1151
package-dir     := $(srctree)/scripts/package
1152
 
1153
%pkg: include/config/kernel.release FORCE
1154
        $(Q)$(MAKE) $(build)=$(package-dir) $@
1155
rpm: include/config/kernel.release FORCE
1156
        $(Q)$(MAKE) $(build)=$(package-dir) $@
1157
 
1158
 
1159
# Brief documentation of the typical targets used
1160
# ---------------------------------------------------------------------------
1161
 
1162
boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1163
boards := $(notdir $(boards))
1164
 
1165
help:
1166
        @echo  'Cleaning targets:'
1167
        @echo  '  clean           - Remove most generated files but keep the config and'
1168
        @echo  '                    enough build support to build external modules'
1169
        @echo  '  mrproper        - Remove all generated files + config + various backup files'
1170
        @echo  '  distclean       - mrproper + remove editor backup and patch files'
1171
        @echo  ''
1172
        @echo  'Configuration targets:'
1173
        @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1174
        @echo  ''
1175
        @echo  'Other generic targets:'
1176
        @echo  '  all             - Build all targets marked with [*]'
1177
        @echo  '* vmlinux         - Build the bare kernel'
1178
        @echo  '* modules         - Build all modules'
1179
        @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1180
        @echo  '  dir/            - Build all files in dir and below'
1181
        @echo  '  dir/file.[ois]  - Build specified target only'
1182
        @echo  '  dir/file.ko     - Build module including final link'
1183
        @echo  '  rpm             - Build a kernel as an RPM package'
1184
        @echo  '  tags/TAGS       - Generate tags file for editors'
1185
        @echo  '  cscope          - Generate cscope index'
1186
        @echo  '  kernelrelease   - Output the release version string'
1187
        @echo  '  kernelversion   - Output the version stored in Makefile'
1188
        @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1189
         echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1190
         echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1191
         fi
1192
        @echo  ''
1193
        @echo  'Static analysers'
1194
        @echo  '  checkstack      - Generate a list of stack hogs'
1195
        @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1196
        @echo  '  export_report   - List the usages of all exported symbols'
1197
        @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1198
         echo  '  headers_check   - Sanity check on exported headers'; \
1199
         fi
1200
        @echo  ''
1201
        @echo  'Kernel packaging:'
1202
        @$(MAKE) $(build)=$(package-dir) help
1203
        @echo  ''
1204
        @echo  'Documentation targets:'
1205
        @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1206
        @echo  ''
1207
        @echo  'Architecture specific targets ($(ARCH)):'
1208
        @$(if $(archhelp),$(archhelp),\
1209
                echo '  No architecture specific help defined for $(ARCH)')
1210
        @echo  ''
1211
        @$(if $(boards), \
1212
                $(foreach b, $(boards), \
1213
                printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1214
                echo '')
1215
 
1216
        @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1217
        @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1218
        @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1219
        @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1220
        @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1221
        @echo  ''
1222
        @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1223
        @echo  'For further info see the ./README file'
1224
 
1225
 
1226
# Documentation targets
1227
# ---------------------------------------------------------------------------
1228
%docs: scripts_basic FORCE
1229
        $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1230
 
1231
else # KBUILD_EXTMOD
1232
 
1233
###
1234
# External module support.
1235
# When building external modules the kernel used as basis is considered
1236
# read-only, and no consistency checks are made and the make
1237
# system is not used on the basis kernel. If updates are required
1238
# in the basis kernel ordinary make commands (without M=...) must
1239
# be used.
1240
#
1241
# The following are the only valid targets when building external
1242
# modules.
1243
# make M=dir clean     Delete all automatically generated files
1244
# make M=dir modules   Make all modules in specified dir
1245
# make M=dir           Same as 'make M=dir modules'
1246
# make M=dir modules_install
1247
#                      Install the modules built in the module directory
1248
#                      Assumes install directory is already created
1249
 
1250
# We are always building modules
1251
KBUILD_MODULES := 1
1252
PHONY += crmodverdir
1253
crmodverdir:
1254
        $(cmd_crmodverdir)
1255
 
1256
PHONY += $(objtree)/Module.symvers
1257
$(objtree)/Module.symvers:
1258
        @test -e $(objtree)/Module.symvers || ( \
1259
        echo; \
1260
        echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1261
        echo "           is missing; modules will have no dependencies and modversions."; \
1262
        echo )
1263
 
1264
module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1265
PHONY += $(module-dirs) modules
1266
$(module-dirs): crmodverdir $(objtree)/Module.symvers
1267
        $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1268
 
1269
modules: $(module-dirs)
1270
        @echo '  Building modules, stage 2.';
1271
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1272
 
1273
PHONY += modules_install
1274
modules_install: _emodinst_ _emodinst_post
1275
 
1276
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1277
PHONY += _emodinst_
1278
_emodinst_:
1279
        $(Q)mkdir -p $(MODLIB)/$(install-dir)
1280
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1281
 
1282
PHONY += _emodinst_post
1283
_emodinst_post: _emodinst_
1284
        $(call cmd,depmod)
1285
 
1286
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1287
 
1288
PHONY += $(clean-dirs) clean
1289
$(clean-dirs):
1290
        $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1291
 
1292
clean:  rm-dirs := $(MODVERDIR)
1293
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1294
clean: $(clean-dirs)
1295
        $(call cmd,rmdirs)
1296
        $(call cmd,rmfiles)
1297
        @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1298
                \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1299
                -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1300
                -type f -print | xargs rm -f
1301
 
1302
help:
1303
        @echo  '  Building external modules.'
1304
        @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1305
        @echo  ''
1306
        @echo  '  modules         - default target, build the module(s)'
1307
        @echo  '  modules_install - install the module'
1308
        @echo  '  clean           - remove generated files in module directory only'
1309
        @echo  ''
1310
 
1311
# Dummies...
1312
PHONY += prepare scripts
1313
prepare: ;
1314
scripts: ;
1315
endif # KBUILD_EXTMOD
1316
 
1317
# Generate tags for editors
1318
# ---------------------------------------------------------------------------
1319
 
1320
#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1321
#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1322
#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1323
 
1324
ifeq ($(src),$(obj))
1325
__srctree =
1326
else
1327
__srctree = $(srctree)/
1328
endif
1329
 
1330
ifeq ($(ALLSOURCE_ARCHS),)
1331
ifeq ($(ARCH),um)
1332
ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1333
else
1334
ALLINCLUDE_ARCHS := $(SRCARCH)
1335
endif
1336
else
1337
#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1338
ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1339
endif
1340
 
1341
ALLSOURCE_ARCHS := $(SRCARCH)
1342
 
1343
define find-sources
1344
        ( for arch in $(ALLSOURCE_ARCHS) ; do \
1345
               find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1346
                    -name $1 -print; \
1347
          done ; \
1348
          find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1349
               -name $1 -print; \
1350
          find $(__srctree)include $(RCS_FIND_IGNORE) \
1351
               \( -name config -o -name 'asm-*' \) -prune \
1352
               -o -name $1 -print; \
1353
          for arch in $(ALLINCLUDE_ARCHS) ; do \
1354
               find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1355
                    -name $1 -print; \
1356
          done ; \
1357
          find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1358
               -name $1 -print; \
1359
          find $(__srctree) $(RCS_FIND_IGNORE) \
1360
               \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1361
               -name $1 -print; \
1362
          )
1363
endef
1364
 
1365
define all-sources
1366
        $(call find-sources,'*.[chS]')
1367
endef
1368
define all-kconfigs
1369
        $(call find-sources,'Kconfig*')
1370
endef
1371
define all-defconfigs
1372
        $(call find-sources,'defconfig')
1373
endef
1374
 
1375
define xtags
1376
        if $1 --version 2>&1 | grep -iq exuberant; then \
1377
            $(all-sources) | xargs $1 -a \
1378
                -I __initdata,__exitdata,__acquires,__releases \
1379
                -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1380
                --extra=+f --c-kinds=+px \
1381
                --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1382
            $(all-kconfigs) | xargs $1 -a \
1383
                --langdef=kconfig \
1384
                --language-force=kconfig \
1385
                --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1386
            $(all-defconfigs) | xargs -r $1 -a \
1387
                --langdef=dotconfig \
1388
                --language-force=dotconfig \
1389
                --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1390
        elif $1 --version 2>&1 | grep -iq emacs; then \
1391
            $(all-sources) | xargs $1 -a; \
1392
            $(all-kconfigs) | xargs $1 -a \
1393
                --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1394
            $(all-defconfigs) | xargs -r $1 -a \
1395
                --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1396
        else \
1397
            $(all-sources) | xargs $1 -a; \
1398
        fi
1399
endef
1400
 
1401
quiet_cmd_cscope-file = FILELST cscope.files
1402
      cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1403
 
1404
quiet_cmd_cscope = MAKE    cscope.out
1405
      cmd_cscope = cscope -b
1406
 
1407
cscope: FORCE
1408
        $(call cmd,cscope-file)
1409
        $(call cmd,cscope)
1410
 
1411
quiet_cmd_TAGS = MAKE   $@
1412
define cmd_TAGS
1413
        rm -f $@; \
1414
        $(call xtags,etags)
1415
endef
1416
 
1417
TAGS: FORCE
1418
        $(call cmd,TAGS)
1419
 
1420
quiet_cmd_tags = MAKE   $@
1421
define cmd_tags
1422
        rm -f $@; \
1423
        $(call xtags,ctags)
1424
endef
1425
 
1426
tags: FORCE
1427
        $(call cmd,tags)
1428
 
1429
 
1430
# Scripts to check various things for consistency
1431
# ---------------------------------------------------------------------------
1432
 
1433
includecheck:
1434
        find * $(RCS_FIND_IGNORE) \
1435
                -name '*.[hcS]' -type f -print | sort \
1436
                | xargs $(PERL) -w scripts/checkincludes.pl
1437
 
1438
versioncheck:
1439
        find * $(RCS_FIND_IGNORE) \
1440
                -name '*.[hcS]' -type f -print | sort \
1441
                | xargs $(PERL) -w scripts/checkversion.pl
1442
 
1443
namespacecheck:
1444
        $(PERL) $(srctree)/scripts/namespace.pl
1445
 
1446
export_report:
1447
        $(PERL) $(srctree)/scripts/export_report.pl
1448
 
1449
endif #ifeq ($(config-targets),1)
1450
endif #ifeq ($(mixed-targets),1)
1451
 
1452
PHONY += checkstack kernelrelease kernelversion
1453
 
1454
# UML needs a little special treatment here.  It wants to use the host
1455
# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1456
# else wants $(ARCH), including people doing cross-builds, which means
1457
# that $(SUBARCH) doesn't work here.
1458
ifeq ($(ARCH), um)
1459
CHECKSTACK_ARCH := $(SUBARCH)
1460
else
1461
CHECKSTACK_ARCH := $(ARCH)
1462
endif
1463
checkstack:
1464
        $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1465
        $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1466
 
1467
kernelrelease:
1468
        $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1469
        $(error kernelrelease not valid - run 'make prepare' to update it))
1470
kernelversion:
1471
        @echo $(KERNELVERSION)
1472
 
1473
# Single targets
1474
# ---------------------------------------------------------------------------
1475
# Single targets are compatible with:
1476
# - build whith mixed source and output
1477
# - build with separate output dir 'make O=...'
1478
# - external modules
1479
#
1480
#  target-dir => where to store outputfile
1481
#  build-dir  => directory in kernel source tree to use
1482
 
1483
ifeq ($(KBUILD_EXTMOD),)
1484
        build-dir  = $(patsubst %/,%,$(dir $@))
1485
        target-dir = $(dir $@)
1486
else
1487
        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1488
        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1489
        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1490
endif
1491
 
1492
%.s: %.c prepare scripts FORCE
1493
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1494
%.i: %.c prepare scripts FORCE
1495
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1496
%.o: %.c prepare scripts FORCE
1497
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1498
%.lst: %.c prepare scripts FORCE
1499
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1500
%.s: %.S prepare scripts FORCE
1501
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1502
%.o: %.S prepare scripts FORCE
1503
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1504
%.symtypes: %.c prepare scripts FORCE
1505
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1506
 
1507
# Modules
1508
/ %/: prepare scripts FORCE
1509
        $(cmd_crmodverdir)
1510
        $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1511
        $(build)=$(build-dir)
1512
%.ko: prepare scripts FORCE
1513
        $(cmd_crmodverdir)
1514
        $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1515
        $(build)=$(build-dir) $(@:.ko=.o)
1516
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1517
 
1518
# FIXME Should go into a make.lib or something
1519
# ===========================================================================
1520
 
1521
quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1522
      cmd_rmdirs = rm -rf $(rm-dirs)
1523
 
1524
quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1525
      cmd_rmfiles = rm -f $(rm-files)
1526
 
1527
# Run depmod only is we have System.map and depmod is executable
1528
# and we build for the host arch
1529
quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1530
      cmd_depmod = \
1531
        if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1532
                $(DEPMOD) -ae -F System.map                                     \
1533
                $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r)   \
1534
                $(KERNELRELEASE);                                               \
1535
        fi
1536
 
1537
# Create temporary dir for module support files
1538
# clean it up only when building all modules
1539
cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1540
                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1541
 
1542
a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1543
          $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1544
          $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1545
 
1546
quiet_cmd_as_o_S = AS      $@
1547
cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1548
 
1549
# read all saved command lines
1550
 
1551
targets := $(wildcard $(sort $(targets)))
1552
cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1553
 
1554
ifneq ($(cmd_files),)
1555
  $(cmd_files): ;       # Do not try to update included dependency files
1556
  include $(cmd_files)
1557
endif
1558
 
1559
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1560
# Usage:
1561
# $(Q)$(MAKE) $(clean)=dir
1562
clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1563
 
1564
endif   # skip-makefile
1565
 
1566
PHONY += FORCE
1567
FORCE:
1568
 
1569
# Declare the contents of the .PHONY variable as phony.  We keep that
1570
# information in a variable se we can use it in if_changed and friends.
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.PHONY: $(PHONY)

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