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1VERSION = 2
2PATCHLEVEL = 6
3SUBLEVEL = 14
4EXTRAVERSION =-rc2
5NAME=Affluent Albatross
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 print "Entering directory ..."
14MAKEFLAGS += --no-print-directory
15
16# We are using a recursive build, so we need to do a little thinking
17# to get the ordering right.
18#
19# Most importantly: sub-Makefiles should only ever modify files in
20# their own directory. If in some directory we have a dependency on
21# a file in another dir (which doesn't happen often, but it's often
22# unavoidable when linking the built-in.o targets which finally
23# turn into vmlinux), we will call a sub make in that other dir, and
24# after that we are sure that everything which is in that other dir
25# is now up to date.
26#
27# The only cases where we need to modify files which have global
28# effects are thus separated out and done before the recursive
29# descending is started. They are now explicitly listed as the
30# prepare rule.
31
32# To put more focus on warnings, be less verbose as default
33# Use 'make V=1' to see the full commands
34
35ifdef V
36 ifeq ("$(origin V)", "command line")
37 KBUILD_VERBOSE = $(V)
38 endif
39endif
40ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42endif
43
44# Call sparse as part of compilation of C files
45# Use 'make C=1' to enable sparse checking
46
47ifdef C
48 ifeq ("$(origin C)", "command line")
49 KBUILD_CHECKSRC = $(C)
50 endif
51endif
52ifndef KBUILD_CHECKSRC
53 KBUILD_CHECKSRC = 0
54endif
55
56# Use make M=dir to specify directory of external module to build
57# Old syntax make ... SUBDIRS=$PWD is still supported
58# Setting the environment variable KBUILD_EXTMOD take precedence
59ifdef SUBDIRS
60 KBUILD_EXTMOD ?= $(SUBDIRS)
61endif
62ifdef M
63 ifeq ("$(origin M)", "command line")
64 KBUILD_EXTMOD := $(M)
65 endif
66endif
67
68
69# kbuild supports saving output files in a separate directory.
70# To locate output files in a separate directory two syntaxes are supported.
71# In both cases the working directory must be the root of the kernel src.
72# 1) O=
73# Use "make O=dir/to/store/output/files/"
74#
75# 2) Set KBUILD_OUTPUT
76# Set the environment variable KBUILD_OUTPUT to point to the directory
77# where the output files shall be placed.
78# export KBUILD_OUTPUT=dir/to/store/output/files/
79# make
80#
81# The O= assignment takes precedence over the KBUILD_OUTPUT environment
82# variable.
83
84
85# KBUILD_SRC is set on invocation of make in OBJ directory
86# KBUILD_SRC is not intended to be used by the regular user (for now)
87ifeq ($(KBUILD_SRC),)
88
89# OK, Make called in directory where kernel src resides
90# Do we want to locate output files in a separate directory?
91ifdef O
92 ifeq ("$(origin O)", "command line")
93 KBUILD_OUTPUT := $(O)
94 endif
95endif
96
97# That's our default target when none is given on the command line
98.PHONY: _all
99_all:
100
101ifneq ($(KBUILD_OUTPUT),)
102# Invoke a second make in the output directory, passing relevant variables
103# check that the output directory actually exists
104saved-output := $(KBUILD_OUTPUT)
105KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
106$(if $(KBUILD_OUTPUT),, \
107 $(error output directory "$(saved-output)" does not exist))
108
109.PHONY: $(MAKECMDGOALS)
110
111$(filter-out _all,$(MAKECMDGOALS)) _all:
112 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
113 KBUILD_SRC=$(CURDIR) \
114 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
115
116# Leave processing to above invocation of make
117skip-makefile := 1
118endif # ifneq ($(KBUILD_OUTPUT),)
119endif # ifeq ($(KBUILD_SRC),)
120
121# We process the rest of the Makefile if this is the final invocation of make
122ifeq ($(skip-makefile),)
123
124# If building an external module we do not care about the all: rule
125# but instead _all depend on modules
126.PHONY: all
127ifeq ($(KBUILD_EXTMOD),)
128_all: all
129else
130_all: modules
131endif
132
133srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
134TOPDIR := $(srctree)
135# FIXME - TOPDIR is obsolete, use srctree/objtree
136objtree := $(CURDIR)
137src := $(srctree)
138obj := $(objtree)
139
140VPATH := $(srctree)
141
142export srctree objtree VPATH TOPDIR
143
144nullstring :=
145space := $(nullstring) # end of line
146
147# Take the contents of any files called localversion* and the config
148# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be
149# careful not to include files twice if building in the source
150# directory. LOCALVERSION from the command line override all of this
151
152localver := $(objtree)/localversion* $(srctree)/localversion*
153localver := $(sort $(wildcard $(localver)))
154# skip backup files (containing '~')
155localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f)))
156
157LOCALVERSION = $(subst $(space),, \
158 $(shell cat /dev/null $(localver)) \
159 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
160
161KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION)
162
163# SUBARCH tells the usermode build what the underlying arch is. That is set
164# first, and if a usermode build is happening, the "ARCH=um" on the command
165# line overrides the setting of ARCH below. If a native build is happening,
166# then ARCH is assigned, getting whatever value it gets normally, and
167# SUBARCH is subsequently ignored.
168
169SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
170 -e s/arm.*/arm/ -e s/sa110/arm/ \
171 -e s/s390x/s390/ -e s/parisc64/parisc/ )
172
173# Cross compiling and selecting different set of gcc/bin-utils
174# ---------------------------------------------------------------------------
175#
176# When performing cross compilation for other architectures ARCH shall be set
177# to the target architecture. (See arch/* for the possibilities).
178# ARCH can be set during invocation of make:
179# make ARCH=ia64
180# Another way is to have ARCH set in the environment.
181# The default ARCH is the host where make is executed.
182
183# CROSS_COMPILE specify the prefix used for all executables used
184# during compilation. Only gcc and related bin-utils executables
185# are prefixed with $(CROSS_COMPILE).
186# CROSS_COMPILE can be set on the command line
187# make CROSS_COMPILE=ia64-linux-
188# Alternatively CROSS_COMPILE can be set in the environment.
189# Default value for CROSS_COMPILE is not to prefix executables
190# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
191
192ARCH ?= $(SUBARCH)
193CROSS_COMPILE ?=
194
195# Architecture as present in compile.h
196UTS_MACHINE := $(ARCH)
197
198# SHELL used by kbuild
199CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
200 else if [ -x /bin/bash ]; then echo /bin/bash; \
201 else echo sh; fi ; fi)
202
203HOSTCC = gcc
204HOSTCXX = g++
205HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
206HOSTCXXFLAGS = -O2
207
208# Decide whether to build built-in, modular, or both.
209# Normally, just do built-in.
210
211KBUILD_MODULES :=
212KBUILD_BUILTIN := 1
213
214# If we have only "make modules", don't compile built-in objects.
215# When we're building modules with modversions, we need to consider
216# the built-in objects during the descend as well, in order to
217# make sure the checksums are uptodate before we record them.
218
219ifeq ($(MAKECMDGOALS),modules)
220 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
221endif
222
223# If we have "make <whatever> modules", compile modules
224# in addition to whatever we do anyway.
225# Just "make" or "make all" shall build modules as well
226
227ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
228 KBUILD_MODULES := 1
229endif
230
231ifeq ($(MAKECMDGOALS),)
232 KBUILD_MODULES := 1
233endif
234
235export KBUILD_MODULES KBUILD_BUILTIN
236export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
237
238# Beautify output
239# ---------------------------------------------------------------------------
240#
241# Normally, we echo the whole command before executing it. By making
242# that echo $($(quiet)$(cmd)), we now have the possibility to set
243# $(quiet) to choose other forms of output instead, e.g.
244#
245# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
246# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
247#
248# If $(quiet) is empty, the whole command will be printed.
249# If it is set to "quiet_", only the short version will be printed.
250# If it is set to "silent_", nothing wil be printed at all, since
251# the variable $(silent_cmd_cc_o_c) doesn't exist.
252#
253# A simple variant is to prefix commands with $(Q) - that's usefull
254# for commands that shall be hidden in non-verbose mode.
255#
256# $(Q)ln $@ :<
257#
258# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
259# If KBUILD_VERBOSE equals 1 then the above command is displayed.
260
261ifeq ($(KBUILD_VERBOSE),1)
262 quiet =
263 Q =
264else
265 quiet=quiet_
266 Q = @
267endif
268
269# If the user is running make -s (silent mode), suppress echoing of
270# commands
271
272ifneq ($(findstring s,$(MAKEFLAGS)),)
273 quiet=silent_
274endif
275
276export quiet Q KBUILD_VERBOSE
277
278######
279# cc support functions to be used (only) in arch/$(ARCH)/Makefile
280# See documentation in Documentation/kbuild/makefiles.txt
281
282# cc-option
283# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
284
285cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
286 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
287
288# For backward compatibility
289check_gcc = $(warning check_gcc is deprecated - use cc-option) \
290 $(call cc-option, $(1),$(2))
291
292# cc-option-yn
293# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
294cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
295 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
296
297# cc-option-align
298# Prefix align with either -falign or -malign
299cc-option-align = $(subst -functions=0,,\
300 $(call cc-option,-falign-functions=0,-malign-functions=0))
301
302# cc-version
303# Usage gcc-ver := $(call cc-version $(CC))
304cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
305 $(if $(1), $(1), $(CC)))
306
307
308# Look for make include files relative to root of kernel src
309MAKEFLAGS += --include-dir=$(srctree)
310
311# We need some generic definitions
312include $(srctree)/scripts/Kbuild.include
313
314# For maximum performance (+ possibly random breakage, uncomment
315# the following)
316
317#MAKEFLAGS += -rR
318
319# Make variables (CC, etc...)
320
321AS = $(CROSS_COMPILE)as
322LD = $(CROSS_COMPILE)ld
323CC = $(CROSS_COMPILE)gcc
324CPP = $(CC) -E
325AR = $(CROSS_COMPILE)ar
326NM = $(CROSS_COMPILE)nm
327STRIP = $(CROSS_COMPILE)strip
328OBJCOPY = $(CROSS_COMPILE)objcopy
329OBJDUMP = $(CROSS_COMPILE)objdump
330AWK = awk
331GENKSYMS = scripts/genksyms/genksyms
332DEPMOD = /sbin/depmod
333KALLSYMS = scripts/kallsyms
334PERL = perl
335CHECK = sparse
336
337CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ $(CF)
338MODFLAGS = -DMODULE
339CFLAGS_MODULE = $(MODFLAGS)
340AFLAGS_MODULE = $(MODFLAGS)
341LDFLAGS_MODULE = -r
342CFLAGS_KERNEL =
343AFLAGS_KERNEL =
344
345
346# Use LINUXINCLUDE when you must reference the include/ directory.
347# Needed to be compatible with the O= option
348LINUXINCLUDE := -Iinclude \
349 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include)
350
351CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
352
353CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
354 -fno-strict-aliasing -fno-common \
355 -ffreestanding
356AFLAGS := -D__ASSEMBLY__
357
358export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
359 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
360 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
361 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
362
363export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
364export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
365export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
366
367# When compiling out-of-tree modules, put MODVERDIR in the module
368# tree rather than in the kernel tree. The kernel tree might
369# even be read-only.
370export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
371
372# Files to ignore in find ... statements
373
374RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg \) -prune -o
375RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg
376
377# ===========================================================================
378# Rules shared between *config targets and build targets
379
380# Basic helpers built in scripts/
381.PHONY: scripts_basic
382scripts_basic:
383 $(Q)$(MAKE) $(build)=scripts/basic
384
385# To avoid any implicit rule to kick in, define an empty command.
386scripts/basic/%: scripts_basic ;
387
388.PHONY: outputmakefile
389# outputmakefile generate a Makefile to be placed in output directory, if
390# using a seperate output directory. This allows convinient use
391# of make in output directory
392outputmakefile:
393 $(Q)if test ! $(srctree) -ef $(objtree); then \
394 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
395 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
396 > $(objtree)/Makefile; \
397 echo ' GEN $(objtree)/Makefile'; \
398 fi
399
400# To make sure we do not include .config for any of the *config targets
401# catch them early, and hand them over to scripts/kconfig/Makefile
402# It is allowed to specify more targets when calling make, including
403# mixing *config targets and build targets.
404# For example 'make oldconfig all'.
405# Detect when mixed targets is specified, and make a second invocation
406# of make so .config is not included in this case either (for *config).
407
408no-dot-config-targets := clean mrproper distclean \
409 cscope TAGS tags help %docs check%
410
411config-targets := 0
412mixed-targets := 0
413dot-config := 1
414
415ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
416 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
417 dot-config := 0
418 endif
419endif
420
421ifeq ($(KBUILD_EXTMOD),)
422 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
423 config-targets := 1
424 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
425 mixed-targets := 1
426 endif
427 endif
428endif
429
430ifeq ($(mixed-targets),1)
431# ===========================================================================
432# We're called with mixed targets (*config and build targets).
433# Handle them one by one.
434
435%:: FORCE
436 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
437
438else
439ifeq ($(config-targets),1)
440# ===========================================================================
441# *config targets only - make sure prerequisites are updated, and descend
442# in scripts/kconfig to make the *config target
443
444# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
445# KBUILD_DEFCONFIG may point out an alternative default configuration
446# used for 'make defconfig'
447include $(srctree)/arch/$(ARCH)/Makefile
448export KBUILD_DEFCONFIG
449
450config %config: scripts_basic outputmakefile FORCE
451 $(Q)mkdir -p include/linux
452 $(Q)$(MAKE) $(build)=scripts/kconfig $@
453
454else
455# ===========================================================================
456# Build targets only - this includes vmlinux, arch specific targets, clean
457# targets and others. In general all targets except *config targets.
458
459ifeq ($(KBUILD_EXTMOD),)
460# Additional helpers built in scripts/
461# Carefully list dependencies so we do not try to build scripts twice
462# in parrallel
463.PHONY: scripts
464scripts: scripts_basic include/config/MARKER
465 $(Q)$(MAKE) $(build)=$(@)
466
467scripts_basic: include/linux/autoconf.h
468
469# Objects we will link into vmlinux / subdirs we need to visit
470init-y := init/
471drivers-y := drivers/ sound/
472net-y := net/
473libs-y := lib/
474core-y := usr/
475endif # KBUILD_EXTMOD
476
477ifeq ($(dot-config),1)
478# In this section, we need .config
479
480# Read in dependencies to all Kconfig* files, make sure to run
481# oldconfig if changes are detected.
482-include .config.cmd
483
484include .config
485
486# If .config needs to be updated, it will be done via the dependency
487# that autoconf has on .config.
488# To avoid any implicit rule to kick in, define an empty command
489.config: ;
490
491# If .config is newer than include/linux/autoconf.h, someone tinkered
492# with it and forgot to run make oldconfig
493include/linux/autoconf.h: .config
494 $(Q)mkdir -p include/linux
495 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
496else
497# Dummy target needed, because used as prerequisite
498include/linux/autoconf.h: ;
499endif
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 overriden in the arch makefile
505all: vmlinux
506
507ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
508CFLAGS += -Os
509else
510CFLAGS += -O2
511endif
512
513#Add align options if CONFIG_CC_* is not equal to 0
514add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
515CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
516CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
517CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
518CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
519
520ifdef CONFIG_FRAME_POINTER
521CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
522else
523CFLAGS += -fomit-frame-pointer
524endif
525
526ifdef CONFIG_DEBUG_INFO
527CFLAGS += -g
528endif
529
530include $(srctree)/arch/$(ARCH)/Makefile
531
532# arch Makefile may override CC so keep this after arch Makefile is included
533NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
534CHECKFLAGS += $(NOSTDINC_FLAGS)
535
536# warn about C99 declaration after statement
537CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
538
539# disable pointer signedness warnings in gcc 4.0
540CFLAGS += $(call cc-option,-Wno-pointer-sign,)
541
542# Default kernel image to build when no specific target is given.
543# KBUILD_IMAGE may be overruled on the commandline or
544# set in the environment
545# Also any assignments in arch/$(ARCH)/Makefile take precedence over
546# this default value
547export KBUILD_IMAGE ?= vmlinux
548
549#
550# INSTALL_PATH specifies where to place the updated kernel and system map
551# images. Default is /boot, but you can set it to other values
552export INSTALL_PATH ?= /boot
553
554# If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests
555# and try to determine if the current source tree is a release tree, of any sort,
556# or if is a pure development tree.
557#
558# A 'release tree' is any tree with a git TAG associated
559# with it. The primary goal of this is to make it safe for a native
560# git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to
561# continue developing against the current Linus tree, without having the Linus
562# tree overwrite the 2.6.9 tree when installed.
563#
564# Currently, only git is supported.
565# Other SCMs can edit scripts/setlocalversion and add the appropriate
566# checks as needed.
567
568
569ifdef CONFIG_LOCALVERSION_AUTO
570 localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree))
571 LOCALVERSION := $(LOCALVERSION)$(localversion-auto)
572endif
573
574#
575# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
576# relocations required by build roots. This is not defined in the
577# makefile but the arguement can be passed to make if needed.
578#
579
580MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
581export MODLIB
582
583
584ifeq ($(KBUILD_EXTMOD),)
585core-y += kernel/ mm/ fs/ ipc/ security/ crypto/
586
587vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
588 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
589 $(net-y) $(net-m) $(libs-y) $(libs-m)))
590
591vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
592 $(init-n) $(init-) \
593 $(core-n) $(core-) $(drivers-n) $(drivers-) \
594 $(net-n) $(net-) $(libs-n) $(libs-))))
595
596init-y := $(patsubst %/, %/built-in.o, $(init-y))
597core-y := $(patsubst %/, %/built-in.o, $(core-y))
598drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
599net-y := $(patsubst %/, %/built-in.o, $(net-y))
600libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
601libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
602libs-y := $(libs-y1) $(libs-y2)
603
604# Build vmlinux
605# ---------------------------------------------------------------------------
606# vmlinux is build from the objects selected by $(vmlinux-init) and
607# $(vmlinux-main). Most are built-in.o files from top-level directories
608# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
609# Ordering when linking is important, and $(vmlinux-init) must be first.
610#
611# vmlinux
612# ^
613# |
614# +-< $(vmlinux-init)
615# | +--< init/version.o + more
616# |
617# +--< $(vmlinux-main)
618# | +--< driver/built-in.o mm/built-in.o + more
619# |
620# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
621#
622# vmlinux version (uname -v) cannot be updated during normal
623# descending-into-subdirs phase since we do not yet know if we need to
624# update vmlinux.
625# Therefore this step is delayed until just before final link of vmlinux -
626# except in the kallsyms case where it is done just before adding the
627# symbols to the kernel.
628#
629# System.map is generated to document addresses of all kernel symbols
630
631vmlinux-init := $(head-y) $(init-y)
632vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
633vmlinux-all := $(vmlinux-init) $(vmlinux-main)
634vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
635
636# Rule to link vmlinux - also used during CONFIG_KALLSYMS
637# May be overridden by arch/$(ARCH)/Makefile
638quiet_cmd_vmlinux__ ?= LD $@
639 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
640 -T $(vmlinux-lds) $(vmlinux-init) \
641 --start-group $(vmlinux-main) --end-group \
642 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
643
644# Generate new vmlinux version
645quiet_cmd_vmlinux_version = GEN .version
646 cmd_vmlinux_version = set -e; \
647 if [ ! -r .version ]; then \
648 rm -f .version; \
649 echo 1 >.version; \
650 else \
651 mv .version .old_version; \
652 expr 0$$(cat .old_version) + 1 >.version; \
653 fi; \
654 $(MAKE) $(build)=init
655
656# Generate System.map
657quiet_cmd_sysmap = SYSMAP
658 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
659
660# Link of vmlinux
661# If CONFIG_KALLSYMS is set .version is already updated
662# Generate System.map and verify that the content is consistent
663
664define rule_vmlinux__
665 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
666
667 $(call cmd,vmlinux__)
668 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
669
670 $(Q)$(if $($(quiet)cmd_sysmap), \
671 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
672 $(cmd_sysmap) $@ System.map; \
673 if [ $$? -ne 0 ]; then \
674 rm -f $@; \
675 /bin/false; \
676 fi;
677 $(verify_kallsyms)
678endef
679
680
681ifdef CONFIG_KALLSYMS
682# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
683# It's a three stage process:
684# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
685# empty
686# Running kallsyms on that gives us .tmp_kallsyms1.o with
687# the right size - vmlinux version (uname -v) is updated during this step
688# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
689# but due to the added section, some addresses have shifted.
690# From here, we generate a correct .tmp_kallsyms2.o
691# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
692# o Verify that the System.map from vmlinux matches the map from
693# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
694# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
695# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
696# temporary bypass to allow the kernel to be built while the
697# maintainers work out what went wrong with kallsyms.
698
699ifdef CONFIG_KALLSYMS_EXTRA_PASS
700last_kallsyms := 3
701else
702last_kallsyms := 2
703endif
704
705kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
706
707define verify_kallsyms
708 $(Q)$(if $($(quiet)cmd_sysmap), \
709 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
710 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
711 $(Q)cmp -s System.map .tmp_System.map || \
712 (echo Inconsistent kallsyms data; \
713 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
714 rm .tmp_kallsyms* ; /bin/false )
715endef
716
717# Update vmlinux version before link
718# Use + in front of this rule to silent warning about make -j1
719# First command is ':' to allow us to use + in front of this rule
720cmd_ksym_ld = $(cmd_vmlinux__)
721define rule_ksym_ld
722 :
723 +$(call cmd,vmlinux_version)
724 $(call cmd,vmlinux__)
725 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
726endef
727
728# Generate .S file with all kernel symbols
729quiet_cmd_kallsyms = KSYM $@
730 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
731 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
732
733.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
734 $(call if_changed_dep,as_o_S)
735
736.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
737 $(call cmd,kallsyms)
738
739# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
740.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
741 $(call if_changed_rule,ksym_ld)
742
743.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
744 $(call if_changed,vmlinux__)
745
746.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
747 $(call if_changed,vmlinux__)
748
749# Needs to visit scripts/ before $(KALLSYMS) can be used.
750$(KALLSYMS): scripts ;
751
752# Generate some data for debugging strange kallsyms problems
753debug_kallsyms: .tmp_map$(last_kallsyms)
754
755.tmp_map%: .tmp_vmlinux% FORCE
756 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
757
758.tmp_map3: .tmp_map2
759
760.tmp_map2: .tmp_map1
761
762endif # ifdef CONFIG_KALLSYMS
763
764# vmlinux image - including updated kernel symbols
765vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
766 $(call if_changed_rule,vmlinux__)
767 $(Q)rm -f .old_version
768
769# The actual objects are generated when descending,
770# make sure no implicit rule kicks in
771$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
772
773# Handle descending into subdirectories listed in $(vmlinux-dirs)
774# Preset locale variables to speed up the build process. Limit locale
775# tweaks to this spot to avoid wrong language settings when running
776# make menuconfig etc.
777# Error messages still appears in the original language
778
779.PHONY: $(vmlinux-dirs)
780$(vmlinux-dirs): prepare scripts
781 $(Q)$(MAKE) $(build)=$@
782
783# Things we need to do before we recursively start building the kernel
784# or the modules are listed in "prepare".
785# A multi level approach is used. prepareN is processed before prepareN-1.
786# archprepare is used in arch Makefiles and when processed asm symlink,
787# version.h and scripts_basic is processed / created.
788
789# Listed in dependency order
790.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
791
792# prepare-all is deprecated, use prepare as valid replacement
793.PHONY: prepare-all
794
795# prepare3 is used to check if we are building in a separate output directory,
796# and if so do:
797# 1) Check that make has not been executed in the kernel src $(srctree)
798# 2) Create the include2 directory, used for the second asm symlink
799
800prepare3:
801ifneq ($(KBUILD_SRC),)
802 @echo ' Using $(srctree) as source for kernel'
803 $(Q)if [ -f $(srctree)/.config ]; then \
804 echo " $(srctree) is not clean, please run 'make mrproper'";\
805 echo " in the '$(srctree)' directory.";\
806 /bin/false; \
807 fi;
808 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
809 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
810endif
811
812# prepare2 creates a makefile if using a separate output directory
813prepare2: prepare3 outputmakefile
814
815prepare1: prepare2 include/linux/version.h include/asm \
816 include/config/MARKER
817ifneq ($(KBUILD_MODULES),)
818 $(Q)rm -rf $(MODVERDIR)
819 $(Q)mkdir -p $(MODVERDIR)
820endif
821
822archprepare: prepare1 scripts_basic
823
824prepare0: archprepare FORCE
825 $(Q)$(MAKE) $(build)=.
826
827# All the preparing..
828prepare prepare-all: prepare0
829
830# Leave this as default for preprocessing vmlinux.lds.S, which is now
831# done in arch/$(ARCH)/kernel/Makefile
832
833export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
834
835# Single targets
836# ---------------------------------------------------------------------------
837
838%.s: %.c scripts FORCE
839 $(Q)$(MAKE) $(build)=$(@D) $@
840%.i: %.c scripts FORCE
841 $(Q)$(MAKE) $(build)=$(@D) $@
842%.o: %.c scripts FORCE
843 $(Q)$(MAKE) $(build)=$(@D) $@
844%.ko: scripts FORCE
845 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
846 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
847%/: scripts prepare FORCE
848 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
849%.lst: %.c scripts FORCE
850 $(Q)$(MAKE) $(build)=$(@D) $@
851%.s: %.S scripts FORCE
852 $(Q)$(MAKE) $(build)=$(@D) $@
853%.o: %.S scripts FORCE
854 $(Q)$(MAKE) $(build)=$(@D) $@
855
856# FIXME: The asm symlink changes when $(ARCH) changes. That's
857# hard to detect, but I suppose "make mrproper" is a good idea
858# before switching between archs anyway.
859
860include/asm:
861 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
862 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
863 @ln -fsn asm-$(ARCH) $@
864
865# Split autoconf.h into include/linux/config/*
866
867include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
868 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
869 @scripts/basic/split-include include/linux/autoconf.h include/config
870 @touch $@
871
872# Generate some files
873# ---------------------------------------------------------------------------
874
875# KERNELRELEASE can change from a few different places, meaning version.h
876# needs to be updated, so this check is forced on all builds
877
878uts_len := 64
879
880define filechk_version.h
881 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
882 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
883 exit 1; \
884 fi; \
885 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
886 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
887 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
888 )
889endef
890
891include/linux/version.h: $(srctree)/Makefile FORCE
892 $(call filechk,version.h)
893
894# ---------------------------------------------------------------------------
895
896.PHONY: depend dep
897depend dep:
898 @echo '*** Warning: make $@ is unnecessary now.'
899
900# ---------------------------------------------------------------------------
901# Modules
902
903ifdef CONFIG_MODULES
904
905# By default, build modules as well
906
907all: modules
908
909# Build modules
910
911.PHONY: modules
912modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
913 @echo ' Building modules, stage 2.';
914 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
915
916
917# Target to prepare building external modules
918.PHONY: modules_prepare
919modules_prepare: prepare scripts
920
921# Target to install modules
922.PHONY: modules_install
923modules_install: _modinst_ _modinst_post
924
925.PHONY: _modinst_
926_modinst_:
927 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
928 echo "Warning: you may need to install module-init-tools"; \
929 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
930 sleep 1; \
931 fi
932 @rm -rf $(MODLIB)/kernel
933 @rm -f $(MODLIB)/source
934 @mkdir -p $(MODLIB)/kernel
935 @ln -s $(srctree) $(MODLIB)/source
936 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
937 rm -f $(MODLIB)/build ; \
938 ln -s $(objtree) $(MODLIB)/build ; \
939 fi
940 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
941
942# If System.map exists, run depmod. This deliberately does not have a
943# dependency on System.map since that would run the dependency tree on
944# vmlinux. This depmod is only for convenience to give the initial
945# boot a modules.dep even before / is mounted read-write. However the
946# boot script depmod is the master version.
947ifeq "$(strip $(INSTALL_MOD_PATH))" ""
948depmod_opts :=
949else
950depmod_opts := -b $(INSTALL_MOD_PATH) -r
951endif
952.PHONY: _modinst_post
953_modinst_post: _modinst_
954 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
955
956else # CONFIG_MODULES
957
958# Modules not configured
959# ---------------------------------------------------------------------------
960
961modules modules_install: FORCE
962 @echo
963 @echo "The present kernel configuration has modules disabled."
964 @echo "Type 'make config' and enable loadable module support."
965 @echo "Then build a kernel with module support enabled."
966 @echo
967 @exit 1
968
969endif # CONFIG_MODULES
970
971###
972# Cleaning is done on three levels.
973# make clean Delete most generated files
974# Leave enough to build external modules
975# make mrproper Delete the current configuration, and all generated files
976# make distclean Remove editor backup files, patch leftover files and the like
977
978# Directories & files removed with 'make clean'
979CLEAN_DIRS += $(MODVERDIR)
980CLEAN_FILES += vmlinux System.map \
981 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
982
983# Directories & files removed with 'make mrproper'
984MRPROPER_DIRS += include/config include2
985MRPROPER_FILES += .config .config.old include/asm .version \
986 include/linux/autoconf.h include/linux/version.h \
987 Module.symvers tags TAGS cscope*
988
989# clean - Delete most, but leave enough to build external modules
990#
991clean: rm-dirs := $(CLEAN_DIRS)
992clean: rm-files := $(CLEAN_FILES)
993clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
994
995.PHONY: $(clean-dirs) clean archclean
996$(clean-dirs):
997 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
998
999clean: archclean $(clean-dirs)
1000 $(call cmd,rmdirs)
1001 $(call cmd,rmfiles)
1002 @find . $(RCS_FIND_IGNORE) \
1003 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1004 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1005 -type f -print | xargs rm -f
1006
1007# mrproper - Delete all generated files, including .config
1008#
1009mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1010mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1011mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1012
1013.PHONY: $(mrproper-dirs) mrproper archmrproper
1014$(mrproper-dirs):
1015 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1016
1017mrproper: clean archmrproper $(mrproper-dirs)
1018 $(call cmd,rmdirs)
1019 $(call cmd,rmfiles)
1020
1021# distclean
1022#
1023.PHONY: distclean
1024
1025distclean: mrproper
1026 @find $(srctree) $(RCS_FIND_IGNORE) \
1027 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1028 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1029 -o -name '.*.rej' -o -size 0 \
1030 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1031 -type f -print | xargs rm -f
1032
1033
1034# Packaging of the kernel to various formats
1035# ---------------------------------------------------------------------------
1036# rpm target kept for backward compatibility
1037package-dir := $(srctree)/scripts/package
1038
1039.PHONY: %-pkg rpm
1040
1041%pkg: FORCE
1042 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1043rpm: FORCE
1044 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1045
1046
1047# Brief documentation of the typical targets used
1048# ---------------------------------------------------------------------------
1049
1050boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1051boards := $(notdir $(boards))
1052
1053help:
1054 @echo 'Cleaning targets:'
1055 @echo ' clean - remove most generated files but keep the config'
1056 @echo ' mrproper - remove all generated files + config + various backup files'
1057 @echo ''
1058 @echo 'Configuration targets:'
1059 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1060 @echo ''
1061 @echo 'Other generic targets:'
1062 @echo ' all - Build all targets marked with [*]'
1063 @echo '* vmlinux - Build the bare kernel'
1064 @echo '* modules - Build all modules'
1065 @echo ' modules_install - Install all modules'
1066 @echo ' dir/ - Build all files in dir and below'
1067 @echo ' dir/file.[ois] - Build specified target only'
1068 @echo ' dir/file.ko - Build module including final link'
1069 @echo ' rpm - Build a kernel as an RPM package'
1070 @echo ' tags/TAGS - Generate tags file for editors'
1071 @echo ' cscope - Generate cscope index'
1072 @echo ' kernelrelease - Output the release version string'
1073 @echo ''
1074 @echo 'Static analysers'
1075 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1076 @echo ' and init sections from non-init sections'
1077 @echo ' checkstack - Generate a list of stack hogs'
1078 @echo ' namespacecheck - Name space analysis on compiled kernel'
1079 @echo ''
1080 @echo 'Kernel packaging:'
1081 @$(MAKE) -f $(package-dir)/Makefile help
1082 @echo ''
1083 @echo 'Documentation targets:'
1084 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1085 @echo ''
1086 @echo 'Architecture specific targets ($(ARCH)):'
1087 @$(if $(archhelp),$(archhelp),\
1088 echo ' No architecture specific help defined for $(ARCH)')
1089 @echo ''
1090 @$(if $(boards), \
1091 $(foreach b, $(boards), \
1092 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1093 echo '')
1094
1095 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1096 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1097 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1098 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1099 @echo ''
1100 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1101 @echo 'For further info see the ./README file'
1102
1103
1104# Documentation targets
1105# ---------------------------------------------------------------------------
1106%docs: scripts_basic FORCE
1107 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1108
1109else # KBUILD_EXTMOD
1110
1111###
1112# External module support.
1113# When building external modules the kernel used as basis is considered
1114# read-only, and no consistency checks are made and the make
1115# system is not used on the basis kernel. If updates are required
1116# in the basis kernel ordinary make commands (without M=...) must
1117# be used.
1118#
1119# The following are the only valid targets when building external
1120# modules.
1121# make M=dir clean Delete all automatically generated files
1122# make M=dir modules Make all modules in specified dir
1123# make M=dir Same as 'make M=dir modules'
1124# make M=dir modules_install
1125# Install the modules build in the module directory
1126# Assumes install directory is already created
1127
1128# We are always building modules
1129KBUILD_MODULES := 1
1130.PHONY: crmodverdir
1131crmodverdir:
1132 $(Q)mkdir -p $(MODVERDIR)
1133
1134.PHONY: $(objtree)/Module.symvers
1135$(objtree)/Module.symvers:
1136 @test -e $(objtree)/Module.symvers || ( \
1137 echo; \
1138 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1139 echo " is missing; modules will have no dependencies and modversions."; \
1140 echo )
1141
1142module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1143.PHONY: $(module-dirs) modules
1144$(module-dirs): crmodverdir $(objtree)/Module.symvers
1145 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1146
1147modules: $(module-dirs)
1148 @echo ' Building modules, stage 2.';
1149 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1150
1151.PHONY: modules_install
1152modules_install:
1153 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1154
1155clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1156
1157.PHONY: $(clean-dirs) clean
1158$(clean-dirs):
1159 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1160
1161clean: rm-dirs := $(MODVERDIR)
1162clean: $(clean-dirs)
1163 $(call cmd,rmdirs)
1164 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1165 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1166 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1167 -type f -print | xargs rm -f
1168
1169help:
1170 @echo ' Building external modules.'
1171 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1172 @echo ''
1173 @echo ' modules - default target, build the module(s)'
1174 @echo ' modules_install - install the module'
1175 @echo ' clean - remove generated files in module directory only'
1176 @echo ''
1177endif # KBUILD_EXTMOD
1178
1179# Generate tags for editors
1180# ---------------------------------------------------------------------------
1181
1182#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1183#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1184#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1185
1186ifeq ($(src),$(obj))
1187__srctree =
1188else
1189__srctree = $(srctree)/
1190endif
1191
1192ALLSOURCE_ARCHS := $(ARCH)
1193
1194define all-sources
1195 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1196 \( -name include -o -name arch \) -prune -o \
1197 -name '*.[chS]' -print; \
1198 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1199 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1200 -name '*.[chS]' -print; \
1201 done ; \
1202 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1203 -name '*.[chS]' -print; \
1204 find $(__srctree)include $(RCS_FIND_IGNORE) \
1205 \( -name config -o -name 'asm-*' \) -prune \
1206 -o -name '*.[chS]' -print; \
1207 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1208 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1209 -name '*.[chS]' -print; \
1210 done ; \
1211 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1212 -name '*.[chS]' -print )
1213endef
1214
1215quiet_cmd_cscope-file = FILELST cscope.files
1216 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1217
1218quiet_cmd_cscope = MAKE cscope.out
1219 cmd_cscope = cscope -b
1220
1221cscope: FORCE
1222 $(call cmd,cscope-file)
1223 $(call cmd,cscope)
1224
1225quiet_cmd_TAGS = MAKE $@
1226define cmd_TAGS
1227 rm -f $@; \
1228 ETAGSF=`etags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1229 $(all-sources) | xargs etags $$ETAGSF -a
1230endef
1231
1232TAGS: FORCE
1233 $(call cmd,TAGS)
1234
1235
1236quiet_cmd_tags = MAKE $@
1237define cmd_tags
1238 rm -f $@; \
1239 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1240 $(all-sources) | xargs ctags $$CTAGSF -a
1241endef
1242
1243tags: FORCE
1244 $(call cmd,tags)
1245
1246
1247# Scripts to check various things for consistency
1248# ---------------------------------------------------------------------------
1249
1250configcheck:
1251 find * $(RCS_FIND_IGNORE) \
1252 -name '*.[hcS]' -type f -print | sort \
1253 | xargs $(PERL) -w scripts/checkconfig.pl
1254
1255includecheck:
1256 find * $(RCS_FIND_IGNORE) \
1257 -name '*.[hcS]' -type f -print | sort \
1258 | xargs $(PERL) -w scripts/checkincludes.pl
1259
1260versioncheck:
1261 find * $(RCS_FIND_IGNORE) \
1262 -name '*.[hcS]' -type f -print | sort \
1263 | xargs $(PERL) -w scripts/checkversion.pl
1264
1265buildcheck:
1266 $(PERL) $(srctree)/scripts/reference_discarded.pl
1267 $(PERL) $(srctree)/scripts/reference_init.pl
1268
1269namespacecheck:
1270 $(PERL) $(srctree)/scripts/namespace.pl
1271
1272endif #ifeq ($(config-targets),1)
1273endif #ifeq ($(mixed-targets),1)
1274
1275.PHONY: checkstack
1276checkstack:
1277 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1278 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1279
1280kernelrelease:
1281 @echo $(KERNELRELEASE)
1282
1283# FIXME Should go into a make.lib or something
1284# ===========================================================================
1285
1286quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1287 cmd_rmdirs = rm -rf $(rm-dirs)
1288
1289quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1290 cmd_rmfiles = rm -f $(rm-files)
1291
1292
1293a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1294 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1295 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1296
1297quiet_cmd_as_o_S = AS $@
1298cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1299
1300# read all saved command lines
1301
1302targets := $(wildcard $(sort $(targets)))
1303cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1304
1305ifneq ($(cmd_files),)
1306 $(cmd_files): ; # Do not try to update included dependency files
1307 include $(cmd_files)
1308endif
1309
1310# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1311# Usage:
1312# $(Q)$(MAKE) $(clean)=dir
1313clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1314
1315endif # skip-makefile
1316
1317FORCE: