path: root/Makefile (plain)
blob: 111adc0cbbd06a4d4cff044de06f15102c8a5a9f

1	VERSION = 1
2	PATCHLEVEL = 22
3	SUBLEVEL = 1
4	EXTRAVERSION =
5	NAME = bionic
6
7	# prevent local tree builds in bionic,
8	# but allow initial version check (SUBMAKE)
9	ifeq (,$(filter s, $(MAKEFLAGS)))
10	KBUILD_OUTPUT ?= $(OUT)/obj/busybox
11	endif
12
13	# *DOCUMENTATION*
14	# To see a list of typical targets execute "make help"
15	# More info can be located in ./README
16	# Comments in this file are targeted only to the developer, do not
17	# expect to learn how to build the kernel reading this file.
18
19	# Do not print "Entering directory ..."
20	MAKEFLAGS += --no-print-directory
21
22	# We are using a recursive build, so we need to do a little thinking
23	# to get the ordering right.
24	#
25	# Most importantly: sub-Makefiles should only ever modify files in
26	# their own directory. If in some directory we have a dependency on
27	# a file in another dir (which doesn't happen often, but it's often
28	# unavoidable when linking the built-in.o targets which finally
29	# turn into busybox), we will call a sub make in that other dir, and
30	# after that we are sure that everything which is in that other dir
31	# is now up to date.
32	#
33	# The only cases where we need to modify files which have global
34	# effects are thus separated out and done before the recursive
35	# descending is started. They are now explicitly listed as the
36	# prepare rule.
37
38	# To put more focus on warnings, be less verbose as default
39	# Use 'make V=1' to see the full commands
40
41	ifdef V
42	ifeq ("$(origin V)", "command line")
43	KBUILD_VERBOSE = $(V)
44	endif
45	endif
46	ifndef KBUILD_VERBOSE
47	KBUILD_VERBOSE = 0
48	endif
49
50	# Call sparse as part of compilation of C files
51	# Use 'make C=1' to enable sparse checking
52
53	ifdef C
54	ifeq ("$(origin C)", "command line")
55	KBUILD_CHECKSRC = $(C)
56	endif
57	endif
58	ifndef KBUILD_CHECKSRC
59	KBUILD_CHECKSRC = 0
60	endif
61
62	# Use make M=dir to specify directory of external module to build
63	# Old syntax make ... SUBDIRS=$PWD is still supported
64	# Setting the environment variable KBUILD_EXTMOD take precedence
65	ifdef SUBDIRS
66	KBUILD_EXTMOD ?= $(SUBDIRS)
67	endif
68	ifdef M
69	ifeq ("$(origin M)", "command line")
70	KBUILD_EXTMOD := $(M)
71	endif
72	endif
73
74
75	# kbuild supports saving output files in a separate directory.
76	# To locate output files in a separate directory two syntaxes are supported.
77	# In both cases the working directory must be the root of the kernel src.
78	# 1) O=
79	# Use "make O=dir/to/store/output/files/"
80	#
81	# 2) Set KBUILD_OUTPUT
82	# Set the environment variable KBUILD_OUTPUT to point to the directory
83	# where the output files shall be placed.
84	# export KBUILD_OUTPUT=dir/to/store/output/files/
85	# make
86	#
87	# The O= assignment takes precedence over the KBUILD_OUTPUT environment
88	# variable.
89
90
91	# KBUILD_SRC is set on invocation of make in OBJ directory
92	# KBUILD_SRC is not intended to be used by the regular user (for now)
93	ifeq ($(KBUILD_SRC),)
94
95	# OK, Make called in directory where kernel src resides
96	# Do we want to locate output files in a separate directory?
97	ifdef O
98	ifeq ("$(origin O)", "command line")
99	KBUILD_OUTPUT := $(O)
100	endif
101	endif
102
103	# That's our default target when none is given on the command line
104	PHONY := _all
105	_all:
106
107	ifneq ($(KBUILD_OUTPUT),)
108	# Invoke a second make in the output directory, passing relevant variables
109	# check that the output directory actually exists
110	saved-output := $(KBUILD_OUTPUT)
111	KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
112	$(if $(KBUILD_OUTPUT),, \
113	$(warning output directory "$(saved-output)" does not exist) \
114	$(error On AOSP repo, type 'mma' to build or set O=out/<folder> ))
115
116	PHONY += $(MAKECMDGOALS)
117
118	$(filter-out _all,$(MAKECMDGOALS)) _all:
119	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
120	KBUILD_SRC=$(CURDIR) \
121	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
122
123	# Leave processing to above invocation of make
124	skip-makefile := 1
125	endif # ifneq ($(KBUILD_OUTPUT),)
126	endif # ifeq ($(KBUILD_SRC),)
127
128	# We process the rest of the Makefile if this is the final invocation of make
129	ifeq ($(skip-makefile),)
130
131	# If building an external module we do not care about the all: rule
132	# but instead _all depend on modules
133	PHONY += all
134	ifeq ($(KBUILD_EXTMOD),)
135	_all: all
136	else
137	_all: modules
138	endif
139
140	srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
141	TOPDIR := $(srctree)
142	# FIXME - TOPDIR is obsolete, use srctree/objtree
143	objtree := $(CURDIR)
144	src := $(srctree)
145	obj := $(objtree)
146
147	VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
148
149	export srctree objtree VPATH TOPDIR
150
151
152	# Cross compiling and selecting different set of gcc/bin-utils
153	# ---------------------------------------------------------------------------
154	#
155	# When performing cross compilation for other architectures ARCH shall be set
156	# to the target architecture. (See arch/* for the possibilities).
157	# ARCH can be set during invocation of make:
158	# make ARCH=ia64
159	# Another way is to have ARCH set in the environment.
160	# The default ARCH is the host where make is executed.
161
162	# CROSS_COMPILE specify the prefix used for all executables used
163	# during compilation. Only gcc and related bin-utils executables
164	# are prefixed with $(CROSS_COMPILE).
165	# CROSS_COMPILE can be set on the command line
166	# make CROSS_COMPILE=ia64-linux-
167	# Alternatively CROSS_COMPILE can be set in the environment.
168	# Default value for CROSS_COMPILE is not to prefix executables
169	# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
170
171	CROSS_COMPILE ?=
172	# bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config,
173	# and it has not been included yet... thus using an awkward syntax.
174	ifeq ($(CROSS_COMPILE),)
175	CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null)
176	CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE))
177	CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE))
178	#")
179	endif
180
181	# SUBARCH tells the usermode build what the underlying arch is. That is set
182	# first, and if a usermode build is happening, the "ARCH=um" on the command
183	# line overrides the setting of ARCH below. If a native build is happening,
184	# then ARCH is assigned, getting whatever value it gets normally, and
185	# SUBARCH is subsequently ignored.
186
187	ifneq ($(CROSS_COMPILE),)
188	SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1)
189	else
190	SUBARCH := $(shell uname -m)
191	endif
192	SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
193	-e s/arm.*/arm/ -e s/sa110/arm/ \
194	-e s/s390x/s390/ -e s/parisc64/parisc/ \
195	-e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
196
197	ARCH ?= $(SUBARCH)
198
199	# Architecture as present in compile.h
200	UTS_MACHINE := $(ARCH)
201
202	# SHELL used by kbuild
203	CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
204	else if [ -x /bin/bash ]; then echo /bin/bash; \
205	else echo sh; fi ; fi)
206
207	# Decide whether to build built-in, modular, or both.
208	# Normally, just do built-in.
209
210	KBUILD_MODULES :=
211	KBUILD_BUILTIN := 1
212
213	# If we have only "make modules", don't compile built-in objects.
214	# When we're building modules with modversions, we need to consider
215	# the built-in objects during the descend as well, in order to
216	# make sure the checksums are uptodate before we record them.
217
218	ifeq ($(MAKECMDGOALS),modules)
219	KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
220	endif
221
222	# If we have "make <whatever> modules", compile modules
223	# in addition to whatever we do anyway.
224	# Just "make" or "make all" shall build modules as well
225
226	ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
227	KBUILD_MODULES := 1
228	endif
229
230	ifeq ($(MAKECMDGOALS),)
231	KBUILD_MODULES := 1
232	endif
233
234	export KBUILD_MODULES KBUILD_BUILTIN
235	export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
236
237	# Beautify output
238	# ---------------------------------------------------------------------------
239	#
240	# Normally, we echo the whole command before executing it. By making
241	# that echo $($(quiet)$(cmd)), we now have the possibility to set
242	# $(quiet) to choose other forms of output instead, e.g.
243	#
244	# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
245	# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
246	#
247	# If $(quiet) is empty, the whole command will be printed.
248	# If it is set to "quiet_", only the short version will be printed.
249	# If it is set to "silent_", nothing wil be printed at all, since
250	# the variable $(silent_cmd_cc_o_c) doesn't exist.
251	#
252	# A simple variant is to prefix commands with $(Q) - that's useful
253	# for commands that shall be hidden in non-verbose mode.
254	#
255	# $(Q)ln $@ :<
256	#
257	# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
258	# If KBUILD_VERBOSE equals 1 then the above command is displayed.
259
260	ifeq ($(KBUILD_VERBOSE),1)
261	quiet =
262	Q =
263	else
264	quiet=quiet_
265	Q = @
266	endif
267
268	# If the user is running make -s (silent mode), suppress echoing of
269	# commands
270
271	ifneq ($(findstring s,$(MAKEFLAGS)),)
272	quiet=silent_
273	endif
274
275	export quiet Q KBUILD_VERBOSE
276
277
278	# Look for make include files relative to root of kernel src
279	MAKEFLAGS += --include-dir=$(srctree)
280
281	HOSTCC = gcc
282	HOSTCXX = g++
283	HOSTCFLAGS :=
284	HOSTCXXFLAGS :=
285	# We need some generic definitions
286	include $(srctree)/scripts/Kbuild.include
287
288	HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,)
289	HOSTCXXFLAGS += -O2
290
291	# For maximum performance (+ possibly random breakage, uncomment
292	# the following)
293
294	MAKEFLAGS += -rR
295
296	# Make variables (CC, etc...)
297
298	AS = $(CROSS_COMPILE)as
299	CC = $(CROSS_COMPILE)gcc
300	LD = $(CC) -nostdlib
301	CPP = $(CC) -E
302	AR = $(CROSS_COMPILE)ar
303	NM = $(CROSS_COMPILE)nm
304	STRIP = $(CROSS_COMPILE)strip
305	OBJCOPY = $(CROSS_COMPILE)objcopy
306	OBJDUMP = $(CROSS_COMPILE)objdump
307	PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config
308	AWK = awk
309	GENKSYMS = scripts/genksyms/genksyms
310	DEPMOD = /sbin/depmod
311	KALLSYMS = scripts/kallsyms
312	PERL = perl
313	CHECK = sparse
314
315	CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
316	MODFLAGS = -DMODULE
317	CFLAGS_MODULE = $(MODFLAGS)
318	AFLAGS_MODULE = $(MODFLAGS)
319	LDFLAGS_MODULE = -r
320	CFLAGS_KERNEL =
321	AFLAGS_KERNEL =
322
323
324	# Use LINUXINCLUDE when you must reference the include/ directory.
325	# Needed to be compatible with the O= option
326	CFLAGS := $(CFLAGS)
327	# Added only to final link stage of busybox binary
328	CFLAGS_busybox := $(CFLAGS_busybox)
329	CPPFLAGS := $(CPPFLAGS)
330	AFLAGS := $(AFLAGS)
331	LDFLAGS := $(LDFLAGS)
332	LDLIBS :=
333
334	# Read KERNELRELEASE from .kernelrelease (if it exists)
335	KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
336	KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
337
338	export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
339	ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
340	CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
341	HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
342
343	export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
344	export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
345	export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
346	export FLTFLAGS
347
348	# When compiling out-of-tree modules, put MODVERDIR in the module
349	# tree rather than in the kernel tree. The kernel tree might
350	# even be read-only.
351	export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
352
353	# Files to ignore in find ... statements
354
355	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
356	export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
357
358	# ===========================================================================
359	# Rules shared between *config targets and build targets
360
361	# Basic helpers built in scripts/
362	PHONY += scripts_basic
363	scripts_basic:
364	$(Q)$(MAKE) $(build)=scripts/basic
365
366	# To avoid any implicit rule to kick in, define an empty command.
367	scripts/basic/%: scripts_basic ;
368
369	# This target generates Kbuild's and Config.in's from *.c files
370	PHONY += gen_build_files
371	gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c)
372	$(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree)
373
374	# bbox: we have helpers in applets/
375	# we depend on scripts_basic, since scripts/basic/fixdep
376	# must be built before any other host prog
377	PHONY += applets_dir
378	applets_dir: scripts_basic gen_build_files
379	$(Q)$(MAKE) $(build)=applets
380
381	applets/%: applets_dir ;
382
383	PHONY += outputmakefile
384	# outputmakefile generates a Makefile in the output directory, if using a
385	# separate output directory. This allows convenient use of make in the
386	# output directory.
387	outputmakefile:
388	ifneq ($(KBUILD_SRC),)
389	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
390	$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
391	endif
392
393	# To make sure we do not include .config for any of the *config targets
394	# catch them early, and hand them over to scripts/kconfig/Makefile
395	# It is allowed to specify more targets when calling make, including
396	# mixing *config targets and build targets.
397	# For example 'make oldconfig all'.
398	# Detect when mixed targets is specified, and make a second invocation
399	# of make so .config is not included in this case either (for *config).
400
401	no-dot-config-targets := clean mrproper distclean \
402	cscope TAGS tags help %docs
403	#bbox# check% is removed from above
404
405	config-targets := 0
406	mixed-targets := 0
407	dot-config := 1
408
409	ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
410	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
411	dot-config := 0
412	endif
413	endif
414
415	ifeq ($(KBUILD_EXTMOD),)
416	ifneq ($(filter config %config,$(MAKECMDGOALS)),)
417	config-targets := 1
418	ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
419	mixed-targets := 1
420	endif
421	endif
422	endif
423
424	ifeq ($(mixed-targets),1)
425	# ===========================================================================
426	# We're called with mixed targets (*config and build targets).
427	# Handle them one by one.
428
429	%:: FORCE
430	$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
431
432	else
433	ifeq ($(config-targets),1)
434	# ===========================================================================
435	# *config targets only - make sure prerequisites are updated, and descend
436	# in scripts/kconfig to make the *config target
437
438	# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
439	# KBUILD_DEFCONFIG may point out an alternative default configuration
440	# used for 'make defconfig'
441	-include $(srctree)/arch/$(ARCH)/Makefile
442	export KBUILD_DEFCONFIG
443
444	config: scripts_basic outputmakefile gen_build_files FORCE
445	$(Q)mkdir -p include
446	$(Q)$(MAKE) $(build)=scripts/kconfig $@
447	$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
448
449	%config: scripts_basic outputmakefile gen_build_files FORCE
450	$(Q)mkdir -p include
451	$(Q)$(MAKE) $(build)=scripts/kconfig $@
452	$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
453
454	else
455	# ===========================================================================
456	# Build targets only - this includes busybox, arch specific targets, clean
457	# targets and others. In general all targets except *config targets.
458
459	ifeq ($(KBUILD_EXTMOD),)
460	# Additional helpers built in scripts/
461	# Carefully list dependencies so we do not try to build scripts twice
462	# in parallel
463	PHONY += scripts
464	scripts: gen_build_files scripts_basic include/config/MARKER
465	$(Q)$(MAKE) $(build)=$(@)
466
467	scripts_basic: include/autoconf.h
468
469	# Objects we will link into busybox / subdirs we need to visit
470	core-y := \
471	applets/ \
472
473	libs-y := \
474	archival/ \
475	archival/libarchive/ \
476	console-tools/ \
477	coreutils/ \
478	coreutils/libcoreutils/ \
479	debianutils/ \
480	e2fsprogs/ \
481	editors/ \
482	findutils/ \
483	init/ \
484	libbb/ \
485	libpwdgrp/ \
486	loginutils/ \
487	mailutils/ \
488	miscutils/ \
489	modutils/ \
490	networking/ \
491	networking/libiproute/ \
492	networking/udhcp/ \
493	printutils/ \
494	procps/ \
495	runit/ \
496	selinux/ \
497	shell/ \
498	sysklogd/ \
499	util-linux/ \
500	util-linux/volume_id/ \
501
502	endif # KBUILD_EXTMOD
503
504	ifeq ($(dot-config),1)
505	# In this section, we need .config
506
507	# Read in dependencies to all Kconfig* files, make sure to run
508	# oldconfig if changes are detected.
509	-include .kconfig.d
510
511	-include .config
512
513	# If .config needs to be updated, it will be done via the dependency
514	# that autoconf has on .config.
515	# To avoid any implicit rule to kick in, define an empty command
516	.config .kconfig.d: ;
517
518	# Now we can define CFLAGS etc according to .config
519	include $(srctree)/Makefile.flags
520
521	# If .config is newer than include/autoconf.h, someone tinkered
522	# with it and forgot to run make oldconfig.
523	# If kconfig.d is missing then we are probarly in a cleaned tree so
524	# we execute the config step to be sure to catch updated Kconfig files
525	include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files
526	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
527
528	include/usage.h: gen_build_files
529
530	else
531	# Dummy target needed, because used as prerequisite
532	include/autoconf.h: ;
533	endif
534
535	# The all: target is the default when no target is given on the
536	# command line.
537	# This allow a user to issue only 'make' to build a kernel including modules
538	# Defaults busybox but it is usually overridden in the arch makefile
539	all: busybox doc
540
541	-include $(srctree)/arch/$(ARCH)/Makefile
542
543	# arch Makefile may override CC so keep this after arch Makefile is included
544	#bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
545	CHECKFLAGS += $(NOSTDINC_FLAGS)
546
547	# Default kernel image to build when no specific target is given.
548	# KBUILD_IMAGE may be overruled on the commandline or
549	# set in the environment
550	# Also any assignments in arch/$(ARCH)/Makefile take precedence over
551	# this default value
552	export KBUILD_IMAGE ?= busybox
553
554	#
555	# INSTALL_PATH specifies where to place the updated kernel and system map
556	# images. Default is /boot, but you can set it to other values
557	export INSTALL_PATH ?= /boot
558
559	#
560	# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
561	# relocations required by build roots. This is not defined in the
562	# makefile but the arguement can be passed to make if needed.
563	#
564
565	MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
566	export MODLIB
567
568
569	ifeq ($(KBUILD_EXTMOD),)
570	busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m)))
571
572	busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \
573	$(core-n) $(core-) $(libs-n) $(libs-) \
574	)))
575
576	core-y := $(patsubst %/, %/built-in.o, $(core-y))
577	libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
578	libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
579	libs-y := $(libs-y1) $(libs-y2)
580
581	# Build busybox
582	# ---------------------------------------------------------------------------
583	# busybox is build from the objects selected by $(busybox-init) and
584	# $(busybox-main). Most are built-in.o files from top-level directories
585	# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
586	# Ordering when linking is important, and $(busybox-init) must be first.
587	#
588	# busybox
589	# ^
590	# |
591	# +-< $(busybox-init)
592	# | +--< init/version.o + more
593	# |
594	# +--< $(busybox-main)
595	# | +--< driver/built-in.o mm/built-in.o + more
596	# |
597	# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
598	#
599	# busybox version (uname -v) cannot be updated during normal
600	# descending-into-subdirs phase since we do not yet know if we need to
601	# update busybox.
602	# Therefore this step is delayed until just before final link of busybox -
603	# except in the kallsyms case where it is done just before adding the
604	# symbols to the kernel.
605	#
606	# System.map is generated to document addresses of all kernel symbols
607
608	busybox-all := $(core-y) $(libs-y)
609
610	# Rule to link busybox - also used during CONFIG_KALLSYMS
611	# May be overridden by arch/$(ARCH)/Makefile
612	quiet_cmd_busybox__ ?= LINK $@
613	cmd_busybox__ ?= $(srctree)/scripts/trylink \
614	"$@" \
615	"$(CC)" \
616	"$(CFLAGS) $(CFLAGS_busybox)" \
617	"$(LDFLAGS) $(EXTRA_LDFLAGS)" \
618	"$(core-y)" \
619	"$(libs-y)" \
620	"$(LDLIBS)"
621
622	# Generate System.map
623	quiet_cmd_sysmap = SYSMAP
624	cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
625
626	# Link of busybox
627	# If CONFIG_KALLSYMS is set .version is already updated
628	# Generate System.map and verify that the content is consistent
629	# Use + in front of the busybox_version rule to silent warning with make -j2
630	# First command is ':' to allow us to use + in front of the rule
631	define rule_busybox__
632	:
633	$(call cmd,busybox__)
634	$(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
635	endef
636
637
638	ifdef CONFIG_KALLSYMS
639	# Generate section listing all symbols and add it into busybox $(kallsyms.o)
640	# It's a three stage process:
641	# o .tmp_busybox1 has all symbols and sections, but __kallsyms is
642	# empty
643	# Running kallsyms on that gives us .tmp_kallsyms1.o with
644	# the right size - busybox version (uname -v) is updated during this step
645	# o .tmp_busybox2 now has a __kallsyms section of the right size,
646	# but due to the added section, some addresses have shifted.
647	# From here, we generate a correct .tmp_kallsyms2.o
648	# o The correct .tmp_kallsyms2.o is linked into the final busybox.
649	# o Verify that the System.map from busybox matches the map from
650	# .tmp_busybox2, just in case we did not generate kallsyms correctly.
651	# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
652	# .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a
653	# temporary bypass to allow the kernel to be built while the
654	# maintainers work out what went wrong with kallsyms.
655
656	ifdef CONFIG_KALLSYMS_EXTRA_PASS
657	last_kallsyms := 3
658	else
659	last_kallsyms := 2
660	endif
661
662	kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
663
664	define verify_kallsyms
665	$(Q)$(if $($(quiet)cmd_sysmap), \
666	echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
667	$(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map
668	$(Q)cmp -s System.map .tmp_System.map || \
669	(echo Inconsistent kallsyms data; \
670	echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
671	rm .tmp_kallsyms* ; /bin/false )
672	endef
673
674	# Update busybox version before link
675	# Use + in front of this rule to silent warning about make -j1
676	# First command is ':' to allow us to use + in front of this rule
677	cmd_ksym_ld = $(cmd_busybox__)
678	define rule_ksym_ld
679	:
680	+$(call cmd,busybox_version)
681	$(call cmd,busybox__)
682	$(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
683	endef
684
685	# Generate .S file with all kernel symbols
686	quiet_cmd_kallsyms = KSYM $@
687	cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
688	$(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
689
690	.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
691	$(call if_changed_dep,as_o_S)
692
693	.tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
694	$(call cmd,kallsyms)
695
696	# .tmp_busybox1 must be complete except kallsyms, so update busybox version
697	.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
698	$(call if_changed_rule,ksym_ld)
699
700	.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
701	$(call if_changed,busybox__)
702
703	.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
704	$(call if_changed,busybox__)
705
706	# Needs to visit scripts/ before $(KALLSYMS) can be used.
707	$(KALLSYMS): scripts ;
708
709	# Generate some data for debugging strange kallsyms problems
710	debug_kallsyms: .tmp_map$(last_kallsyms)
711
712	.tmp_map%: .tmp_busybox% FORCE
713	($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
714
715	.tmp_map3: .tmp_map2
716
717	.tmp_map2: .tmp_map1
718
719	endif # ifdef CONFIG_KALLSYMS
720
721	# busybox image - including updated kernel symbols
722	busybox_unstripped: $(busybox-all) FORCE
723	$(call if_changed_rule,busybox__)
724	$(Q)rm -f .old_version
725
726	busybox: busybox_unstripped
727	ifeq ($(SKIP_STRIP),y)
728	$(Q)cp $< $@
729	else
730	$(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
731	busybox_unstripped -o $@
732	# strip is confused by PIE executable and does not set exec bits
733	$(Q)chmod a+x $@
734	endif
735
736	# The actual objects are generated when descending,
737	# make sure no implicit rule kicks in
738	$(sort $(busybox-all)): $(busybox-dirs) ;
739
740	# Handle descending into subdirectories listed in $(busybox-dirs)
741	# Preset locale variables to speed up the build process. Limit locale
742	# tweaks to this spot to avoid wrong language settings when running
743	# make menuconfig etc.
744	# Error messages still appears in the original language
745
746	PHONY += $(busybox-dirs)
747	$(busybox-dirs): prepare scripts
748	$(Q)$(MAKE) $(build)=$@
749
750	# Build the kernel release string
751	# The KERNELRELEASE is stored in a file named .kernelrelease
752	# to be used when executing for example make install or make modules_install
753	#
754	# Take the contents of any files called localversion* and the config
755	# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
756	# LOCALVERSION from the command line override all of this
757
758	nullstring :=
759	space := $(nullstring) # end of line
760
761	___localver = $(objtree)/localversion* $(srctree)/localversion*
762	__localver = $(sort $(wildcard $(___localver)))
763	# skip backup files (containing '~')
764	_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
765
766	localver = $(subst $(space),, \
767	$(shell cat /dev/null $(_localver)) \
768	$(patsubst "%",%,$(CONFIG_LOCALVERSION)))
769
770	# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
771	# and if the SCM is know a tag from the SCM is appended.
772	# The appended tag is determinded by the SCM used.
773	#
774	# Currently, only git is supported.
775	# Other SCMs can edit scripts/setlocalversion and add the appropriate
776	# checks as needed.
777	ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO
778	_localver-auto = $(shell $(CONFIG_SHELL) \
779	$(srctree)/scripts/setlocalversion $(srctree))
780	localver-auto = $(LOCALVERSION)$(_localver-auto)
781	endif
782
783	localver-full = $(localver)$(localver-auto)
784
785	# Store (new) KERNELRELASE string in .kernelrelease
786	kernelrelease = $(KERNELVERSION)$(localver-full)
787	.kernelrelease: FORCE
788	$(Q)rm -f $@
789	$(Q)echo $(kernelrelease) > $@
790
791
792	# Things we need to do before we recursively start building the kernel
793	# or the modules are listed in "prepare".
794	# A multi level approach is used. prepareN is processed before prepareN-1.
795	# archprepare is used in arch Makefiles and when processed asm symlink,
796	# version.h and scripts_basic is processed / created.
797
798	# Listed in dependency order
799	PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
800
801	# prepare-all is deprecated, use prepare as valid replacement
802	PHONY += prepare-all
803
804	# prepare3 is used to check if we are building in a separate output directory,
805	# and if so do:
806	# 1) Check that make has not been executed in the kernel src $(srctree)
807	# 2) Create the include2 directory, used for the second asm symlink
808	prepare3: .kernelrelease
809	ifneq ($(KBUILD_SRC),)
810	@echo ' Using $(srctree) as source for busybox'
811	$(Q)if [ -f $(srctree)/.config ]; then \
812	echo " $(srctree) is not clean, please run 'make mrproper'";\
813	echo " in the '$(srctree)' directory.";\
814	/bin/false; \
815	fi;
816	$(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
817	$(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
818	endif
819
820	# prepare2 creates a makefile if using a separate output directory
821	prepare2: prepare3 outputmakefile
822
823	prepare1: prepare2 include/config/MARKER
824	ifneq ($(KBUILD_MODULES),)
825	$(Q)mkdir -p $(MODVERDIR)
826	$(Q)rm -f $(MODVERDIR)/*
827	endif
828
829	archprepare: prepare1 scripts_basic applets_dir
830
831	prepare0: archprepare FORCE
832	$(Q)$(MAKE) $(build)=.
833
834	# All the preparing..
835	prepare prepare-all: prepare0
836
837	# Leave this as default for preprocessing busybox.lds.S, which is now
838	# done in arch/$(ARCH)/kernel/Makefile
839
840	export CPPFLAGS_busybox.lds += -P -C -U$(ARCH)
841
842	# FIXME: The asm symlink changes when $(ARCH) changes. That's
843	# hard to detect, but I suppose "make mrproper" is a good idea
844	# before switching between archs anyway.
845
846	#bbox# include/asm:
847	#bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
848	#bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi;
849	#bbox# @ln -fsn asm-$(ARCH) $@
850
851	# Split autoconf.h into include/linux/config/*
852	quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h
853	cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs include/bbconfigopts.h include/bbconfigopts_bz2.h
854	quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/*
855	cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config
856	#bbox# piggybacked generation of few .h files
857	include/config/MARKER: scripts/basic/split-include include/autoconf.h
858	$(call cmd,split_autoconf)
859	$(call cmd,gen_bbconfigopts)
860	@touch $@
861
862	# Generate some files
863	# ---------------------------------------------------------------------------
864
865	# KERNELRELEASE can change from a few different places, meaning version.h
866	# needs to be updated, so this check is forced on all builds
867
868	uts_len := 64
869
870	define filechk_version.h
871	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
872	echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
873	exit 1; \
874	fi; \
875	(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
876	echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
877	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
878	)
879	endef
880
881	# ---------------------------------------------------------------------------
882
883	PHONY += depend dep
884	depend dep:
885	@echo '*** Warning: make $@ is unnecessary now.'
886
887	# ---------------------------------------------------------------------------
888	# Modules
889
890	ifdef _BB_DISABLED_CONFIG_MODULES
891
892	# By default, build modules as well
893
894	all: modules
895
896	# Build modules
897
898	PHONY += modules
899	modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox)
900	@echo ' Building modules, stage 2.';
901	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
902
903
904	# Target to prepare building external modules
905	PHONY += modules_prepare
906	modules_prepare: prepare scripts
907
908	# Target to install modules
909	PHONY += modules_install
910	modules_install: _modinst_ _modinst_post
911
912	PHONY += _modinst_
913	_modinst_:
914	@if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
915	echo "Warning: you may need to install module-init-tools"; \
916	echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
917	sleep 1; \
918	fi
919	@rm -rf $(MODLIB)/kernel
920	@rm -f $(MODLIB)/source
921	@mkdir -p $(MODLIB)/kernel
922	@ln -s $(srctree) $(MODLIB)/source
923	@if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
924	rm -f $(MODLIB)/build ; \
925	ln -s $(objtree) $(MODLIB)/build ; \
926	fi
927	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
928
929	# If System.map exists, run depmod. This deliberately does not have a
930	# dependency on System.map since that would run the dependency tree on
931	# busybox. This depmod is only for convenience to give the initial
932	# boot a modules.dep even before / is mounted read-write. However the
933	# boot script depmod is the master version.
934	ifeq "$(strip $(INSTALL_MOD_PATH))" ""
935	depmod_opts :=
936	else
937	depmod_opts := -b $(INSTALL_MOD_PATH) -r
938	endif
939	PHONY += _modinst_post
940	_modinst_post: _modinst_
941	if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
942
943	else # CONFIG_MODULES
944
945	# Modules not configured
946	# ---------------------------------------------------------------------------
947
948	modules modules_install: FORCE
949	@echo
950	@echo "The present busybox configuration has modules disabled."
951	@echo "Type 'make config' and enable loadable module support."
952	@echo "Then build a kernel with module support enabled."
953	@echo
954	@exit 1
955
956	endif # CONFIG_MODULES
957
958	###
959	# Cleaning is done on three levels.
960	# make clean Delete most generated files
961	# Leave enough to build external modules
962	# make mrproper Delete the current configuration, and all generated files
963	# make distclean Remove editor backup files, patch leftover files and the like
964
965	# Directories & files removed with 'make clean'
966	CLEAN_DIRS += $(MODVERDIR) _install 0_lib
967	CLEAN_FILES += busybox busybox_unstripped* busybox.links \
968	System.map .kernelrelease \
969	.tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map
970
971	# Directories & files removed with 'make mrproper'
972	MRPROPER_DIRS += include/config include2
973	MRPROPER_FILES += .config .config.old include/asm .version .old_version \
974	include/NUM_APPLETS.h \
975	include/autoconf.h \
976	include/bbconfigopts.h \
977	include/bbconfigopts_bz2.h \
978	include/usage_compressed.h \
979	include/applet_tables.h \
980	include/applets.h \
981	include/usage.h \
982	applets/usage \
983	.kernelrelease Module.symvers tags TAGS cscope* \
984	busybox_old
985
986	MRPROPER_FILES += include-full/*.h \
987	include-minimal/*.h
988
989	# clean - Delete most, but leave enough to build external modules
990	#
991	clean: rm-dirs := $(CLEAN_DIRS)
992	clean: rm-files := $(CLEAN_FILES)
993	clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs))
994
995	PHONY += $(clean-dirs) clean archclean
996	$(clean-dirs):
997	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
998
999	clean: 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	PHONY += doc-clean
1008	doc-clean: rm-files := docs/busybox.pod \
1009	docs/BusyBox.html docs/busybox.1 docs/BusyBox.txt
1010	doc-clean:
1011	$(call cmd,rmfiles)
1012
1013	# mrproper - Delete all generated files, including .config
1014	#
1015	mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1016	mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1017	mrproper-dirs := $(addprefix _mrproper_,scripts)
1018
1019	PHONY += $(mrproper-dirs) mrproper archmrproper
1020	$(mrproper-dirs):
1021	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1022
1023	mrproper: clean archmrproper $(mrproper-dirs)
1024	$(call cmd,rmdirs)
1025	$(call cmd,rmfiles)
1026	@find . -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f
1027	@find . -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f
1028
1029	# distclean
1030	#
1031	PHONY += distclean
1032
1033	distclean: mrproper
1034	@find $(srctree) $(RCS_FIND_IGNORE) \
1035	\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1036	-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1037	-o -name '.*.rej' -o -name '*.tmp' -o -size 0 \
1038	-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1039	-type f -print | xargs rm -f
1040
1041
1042	# Packaging of the kernel to various formats
1043	# ---------------------------------------------------------------------------
1044	# rpm target kept for backward compatibility
1045	package-dir := $(srctree)/scripts/package
1046
1047	%pkg: FORCE
1048	$(Q)$(MAKE) $(build)=$(package-dir) $@
1049	rpm: FORCE
1050	$(Q)$(MAKE) $(build)=$(package-dir) $@
1051
1052
1053	# Brief documentation of the typical targets used
1054	# ---------------------------------------------------------------------------
1055
1056	boards := $(wildcard $(srctree)/configs/*_defconfig)
1057	boards := $(notdir $(boards))
1058
1059	-include $(srctree)/Makefile.help
1060
1061	# Documentation targets
1062	# ---------------------------------------------------------------------------
1063	%docs: scripts_basic FORCE
1064	$(Q)$(MAKE) $(build)=Documentation/DocBook $@
1065
1066	else # KBUILD_EXTMOD
1067
1068	###
1069	# External module support.
1070	# When building external modules the kernel used as basis is considered
1071	# read-only, and no consistency checks are made and the make
1072	# system is not used on the basis kernel. If updates are required
1073	# in the basis kernel ordinary make commands (without M=...) must
1074	# be used.
1075	#
1076	# The following are the only valid targets when building external
1077	# modules.
1078	# make M=dir clean Delete all automatically generated files
1079	# make M=dir modules Make all modules in specified dir
1080	# make M=dir Same as 'make M=dir modules'
1081	# make M=dir modules_install
1082	# Install the modules build in the module directory
1083	# Assumes install directory is already created
1084
1085	# We are always building modules
1086	KBUILD_MODULES := 1
1087	PHONY += crmodverdir
1088	crmodverdir:
1089	$(Q)mkdir -p $(MODVERDIR)
1090	$(Q)rm -f $(MODVERDIR)/*
1091
1092	PHONY += $(objtree)/Module.symvers
1093	$(objtree)/Module.symvers:
1094	@test -e $(objtree)/Module.symvers || ( \
1095	echo; \
1096	echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1097	echo " is missing; modules will have no dependencies and modversions."; \
1098	echo )
1099
1100	module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1101	PHONY += $(module-dirs) modules
1102	$(module-dirs): crmodverdir $(objtree)/Module.symvers
1103	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1104
1105	modules: $(module-dirs)
1106	@echo ' Building modules, stage 2.';
1107	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1108
1109	PHONY += modules_install
1110	modules_install: _emodinst_ _emodinst_post
1111
1112	install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1113	PHONY += _emodinst_
1114	_emodinst_:
1115	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1116	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1117
1118	# Run depmod only is we have System.map and depmod is executable
1119	quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1120	cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1121	$(DEPMOD) -ae -F System.map \
1122	$(if $(strip $(INSTALL_MOD_PATH)), \
1123	-b $(INSTALL_MOD_PATH) -r) \
1124	$(KERNELRELEASE); \
1125	fi
1126
1127	PHONY += _emodinst_post
1128	_emodinst_post: _emodinst_
1129	$(call cmd,depmod)
1130
1131	clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1132
1133	PHONY += $(clean-dirs) clean
1134	$(clean-dirs):
1135	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1136
1137	clean: rm-dirs := $(MODVERDIR)
1138	clean: $(clean-dirs)
1139	$(call cmd,rmdirs)
1140	@find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1141	\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1142	-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1143	-type f -print | xargs rm -f
1144
1145	# Dummies...
1146	PHONY += prepare scripts
1147	prepare: ;
1148	scripts: ;
1149	endif # KBUILD_EXTMOD
1150
1151	# Generate tags for editors
1152	# ---------------------------------------------------------------------------
1153
1154	#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1155	#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1156	#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1157
1158	ifeq ($(src),$(obj))
1159	__srctree =
1160	else
1161	__srctree = $(srctree)/
1162	endif
1163
1164	ifeq ($(ALLSOURCE_ARCHS),)
1165	ifeq ($(ARCH),um)
1166	ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1167	else
1168	ALLINCLUDE_ARCHS := $(ARCH)
1169	endif
1170	else
1171	#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1172	ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1173	endif
1174
1175	ALLSOURCE_ARCHS := $(ARCH)
1176
1177	define all-sources
1178	( find $(__srctree) $(RCS_FIND_IGNORE) \
1179	\( -name include -o -name arch \) -prune -o \
1180	-name '*.[chS]' -print; \
1181	for ARCH in $(ALLSOURCE_ARCHS) ; do \
1182	find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1183	-name '*.[chS]' -print; \
1184	done ; \
1185	find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1186	-name '*.[chS]' -print; \
1187	find $(__srctree)include $(RCS_FIND_IGNORE) \
1188	\( -name config -o -name 'asm-*' \) -prune \
1189	-o -name '*.[chS]' -print; \
1190	for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1191	find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1192	-name '*.[chS]' -print; \
1193	done ; \
1194	find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1195	-name '*.[chS]' -print )
1196	endef
1197
1198	quiet_cmd_cscope-file = FILELST cscope.files
1199	cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1200
1201	quiet_cmd_cscope = MAKE cscope.out
1202	cmd_cscope = cscope -b
1203
1204	cscope: FORCE
1205	$(call cmd,cscope-file)
1206	$(call cmd,cscope)
1207
1208	quiet_cmd_TAGS = MAKE $@
1209	define cmd_TAGS
1210	rm -f $@; \
1211	ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1212	echo "-I __initdata,__exitdata,__acquires,__releases \
1213	-I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1214	--extra=+f --c-kinds=+px"`; \
1215	$(all-sources) | xargs etags $$ETAGSF -a
1216	endef
1217
1218	TAGS: FORCE
1219	$(call cmd,TAGS)
1220
1221
1222	quiet_cmd_tags = MAKE $@
1223	define cmd_tags
1224	rm -f $@; \
1225	CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1226	echo "-I __initdata,__exitdata,__acquires,__releases \
1227	-I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1228	--extra=+f --c-kinds=+px"`; \
1229	$(all-sources) | xargs ctags $$CTAGSF -a
1230	endef
1231
1232	tags: FORCE
1233	$(call cmd,tags)
1234
1235
1236	# Scripts to check various things for consistency
1237	# ---------------------------------------------------------------------------
1238
1239	includecheck:
1240	find * $(RCS_FIND_IGNORE) \
1241	-name '*.[hcS]' -type f -print | sort \
1242	| xargs $(PERL) -w scripts/checkincludes.pl
1243
1244	versioncheck:
1245	find * $(RCS_FIND_IGNORE) \
1246	-name '*.[hcS]' -type f -print | sort \
1247	| xargs $(PERL) -w scripts/checkversion.pl
1248
1249	namespacecheck:
1250	$(PERL) $(srctree)/scripts/namespace.pl
1251
1252	endif #ifeq ($(config-targets),1)
1253	endif #ifeq ($(mixed-targets),1)
1254
1255	PHONY += checkstack
1256	checkstack:
1257	$(OBJDUMP) -d busybox $$(find . -name '*.ko') | \
1258	$(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1259
1260	kernelrelease:
1261	$(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1262	$(error kernelrelease not valid - run 'make *config' to update it))
1263	kernelversion:
1264	@echo $(KERNELVERSION)
1265
1266	# Single targets
1267	# ---------------------------------------------------------------------------
1268	# Single targets are compatible with:
1269	# - build whith mixed source and output
1270	# - build with separate output dir 'make O=...'
1271	# - external modules
1272	#
1273	# target-dir => where to store outputfile
1274	# build-dir => directory in kernel source tree to use
1275
1276	ifeq ($(KBUILD_EXTMOD),)
1277	build-dir = $(patsubst %/,%,$(dir $@))
1278	target-dir = $(dir $@)
1279	else
1280	zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1281	build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1282	target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1283	endif
1284
1285	%.s: %.c prepare scripts FORCE
1286	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1287	%.i: %.c prepare scripts FORCE
1288	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1289	%.o: %.c prepare scripts FORCE
1290	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1291	%.lst: %.c prepare scripts FORCE
1292	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1293	%.s: %.S prepare scripts FORCE
1294	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1295	%.o: %.S prepare scripts FORCE
1296	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1297
1298	# Modules
1299	%/: prepare scripts FORCE
1300	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1301	$(build)=$(build-dir)
1302	/: prepare scripts FORCE
1303	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1304	$(build)=$(build-dir)
1305
1306	%.ko: prepare scripts FORCE
1307	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1308	$(build)=$(build-dir) $(@:.ko=.o)
1309	$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1310
1311	# FIXME Should go into a make.lib or something
1312	# ===========================================================================
1313
1314	quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1315	cmd_rmdirs = rm -rf $(rm-dirs)
1316
1317	quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1318	cmd_rmfiles = rm -f $(rm-files)
1319
1320
1321	a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1322	$(NOSTDINC_FLAGS) $(CPPFLAGS) \
1323	$(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1324
1325	quiet_cmd_as_o_S = AS $@
1326	cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1327
1328	# read all saved command lines
1329
1330	targets := $(wildcard $(sort $(targets)))
1331	cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1332
1333	ifneq ($(cmd_files),)
1334	$(cmd_files): ; # Do not try to update included dependency files
1335	include $(cmd_files)
1336	endif
1337
1338	# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1339	# Usage:
1340	# $(Q)$(MAKE) $(clean)=dir
1341	clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1342
1343	endif # skip-makefile
1344
1345	PHONY += FORCE
1346	FORCE:
1347
1348	show-sources:
1349	@for f in $(busybox-dirs) ; do \
1350	$(MAKE) $(build)=$$f show-src ; \
1351	done
1352
1353	-include $(srctree)/Makefile.custom
1354
1355	# Declare the contents of the .PHONY variable as phony. We keep that
1356	# information in a variable se we can use it in if_changed and friends.
1357	.PHONY: $(PHONY)
1358