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1	VERSION = 2
2	PATCHLEVEL = 6
3	SUBLEVEL = 35
4	EXTRAVERSION =
5	NAME = Sheep on Meth
6
7	# DOCUMENTATION
8	# To see a list of typical targets execute "make help"
9	# More info can be located in ./README
10	# Comments in this file are targeted only to the developer, do not
11	# expect to learn how to build the kernel reading this file.
12
13	# Do not:
14	# o use make's built-in rules and variables
15	# (this increases performance and avoids hard-to-debug behaviour);
16	# o print "Entering directory ...";
17	MAKEFLAGS += -rR --no-print-directory
18
19	# Avoid funny character set dependencies
20	unexport LC_ALL
21	LC_COLLATE=C
22	LC_NUMERIC=C
23	export LC_COLLATE LC_NUMERIC
24
25	# We are using a recursive build, so we need to do a little thinking
26	# to get the ordering right.
27	#
28	# Most importantly: sub-Makefiles should only ever modify files in
29	# their own directory. If in some directory we have a dependency on
30	# a file in another dir (which doesn't happen often, but it's often
31	# unavoidable when linking the built-in.o targets which finally
32	# turn into vmlinux), we will call a sub make in that other dir, and
33	# after that we are sure that everything which is in that other dir
34	# is now up to date.
35	#
36	# The only cases where we need to modify files which have global
37	# effects are thus separated out and done before the recursive
38	# descending is started. They are now explicitly listed as the
39	# prepare rule.
40
41	# To put more focus on warnings, be less verbose as default
42	# Use 'make V=1' to see the full commands
43
44	ifeq ("$(origin V)", "command line")
45	KBUILD_VERBOSE = $(V)
46	endif
47	ifndef KBUILD_VERBOSE
48	KBUILD_VERBOSE = 0
49	endif
50
51	# Call a source code checker (by default, "sparse") as part of the
52	# C compilation.
53	#
54	# Use 'make C=1' to enable checking of only re-compiled files.
55	# Use 'make C=2' to enable checking of all source files, regardless
56	# of whether they are re-compiled or not.
57	#
58	# See the file "Documentation/sparse.txt" for more details, including
59	# where to get the "sparse" utility.
60
61	ifeq ("$(origin C)", "command line")
62	KBUILD_CHECKSRC = $(C)
63	endif
64	ifndef KBUILD_CHECKSRC
65	KBUILD_CHECKSRC = 0
66	endif
67
68	# Use make M=dir to specify directory of external module to build
69	# Old syntax make ... SUBDIRS=$PWD is still supported
70	# Setting the environment variable KBUILD_EXTMOD take precedence
71	ifdef SUBDIRS
72	KBUILD_EXTMOD ?= $(SUBDIRS)
73	endif
74
75	ifeq ("$(origin M)", "command line")
76	KBUILD_EXTMOD := $(M)
77	endif
78
79	# kbuild supports saving output files in a separate directory.
80	# To locate output files in a separate directory two syntaxes are supported.
81	# In both cases the working directory must be the root of the kernel src.
82	# 1) O=
83	# Use "make O=dir/to/store/output/files/"
84	#
85	# 2) Set KBUILD_OUTPUT
86	# Set the environment variable KBUILD_OUTPUT to point to the directory
87	# where the output files shall be placed.
88	# export KBUILD_OUTPUT=dir/to/store/output/files/
89	# make
90	#
91	# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92	# variable.
93
94
95	# KBUILD_SRC is set on invocation of make in OBJ directory
96	# KBUILD_SRC is not intended to be used by the regular user (for now)
97	ifeq ($(KBUILD_SRC),)
98
99	# OK, Make called in directory where kernel src resides
100	# Do we want to locate output files in a separate directory?
101	ifeq ("$(origin O)", "command line")
102	KBUILD_OUTPUT := $(O)
103	endif
104
105	# That's our default target when none is given on the command line
106	PHONY := _all
107	_all:
108
109	# Cancel implicit rules on top Makefile
110	$(CURDIR)/Makefile Makefile: ;
111
112	ifneq ($(KBUILD_OUTPUT),)
113	# Invoke a second make in the output directory, passing relevant variables
114	# check that the output directory actually exists
115	saved-output := $(KBUILD_OUTPUT)
116	KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
117	$(if $(KBUILD_OUTPUT),, \
118	$(error output directory "$(saved-output)" does not exist))
119
120	PHONY += $(MAKECMDGOALS) sub-make
121
122	$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
123	$(Q)@:
124
125	sub-make: FORCE
126	$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
127	KBUILD_SRC=$(CURDIR) \
128	KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
129	$(filter-out _all sub-make,$(MAKECMDGOALS))
130
131	# Leave processing to above invocation of make
132	skip-makefile := 1
133	endif # ifneq ($(KBUILD_OUTPUT),)
134	endif # ifeq ($(KBUILD_SRC),)
135
136	# We process the rest of the Makefile if this is the final invocation of make
137	ifeq ($(skip-makefile),)
138
139	# If building an external module we do not care about the all: rule
140	# but instead _all depend on modules
141	PHONY += all
142	ifeq ($(KBUILD_EXTMOD),)
143	_all: all
144	else
145	_all: modules
146	endif
147
148	srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
149	objtree := $(CURDIR)
150	src := $(srctree)
151	obj := $(objtree)
152
153	VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
154
155	export srctree objtree VPATH
156
157
158	# SUBARCH tells the usermode build what the underlying arch is. That is set
159	# first, and if a usermode build is happening, the "ARCH=um" on the command
160	# line overrides the setting of ARCH below. If a native build is happening,
161	# then ARCH is assigned, getting whatever value it gets normally, and
162	# SUBARCH is subsequently ignored.
163
164	SUBARCH := $(shell uname -m \| sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
165	-e s/arm.*/arm/ -e s/sa110/arm/ \
166	-e s/s390x/s390/ -e s/parisc64/parisc/ \
167	-e s/ppc./powerpc/ -e s/mips./mips/ \
168	-e s/sh[234].*/sh/ )
169
170	# Cross compiling and selecting different set of gcc/bin-utils
171	# ---------------------------------------------------------------------------
172	#
173	# When performing cross compilation for other architectures ARCH shall be set
174	# to the target architecture. (See arch/* for the possibilities).
175	# ARCH can be set during invocation of make:
176	# make ARCH=ia64
177	# Another way is to have ARCH set in the environment.
178	# The default ARCH is the host where make is executed.
179
180	# CROSS_COMPILE specify the prefix used for all executables used
181	# during compilation. Only gcc and related bin-utils executables
182	# are prefixed with $(CROSS_COMPILE).
183	# CROSS_COMPILE can be set on the command line
184	# make CROSS_COMPILE=ia64-linux-
185	# Alternatively CROSS_COMPILE can be set in the environment.
186	# A third alternative is to store a setting in .config so that plain
187	# "make" in the configured kernel build directory always uses that.
188	# Default value for CROSS_COMPILE is not to prefix executables
189	# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
190	export KBUILD_BUILDHOST := $(SUBARCH)
191	ARCH ?= $(SUBARCH)
192	CROSS_COMPILE ?=
193	CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
194
195	# Architecture as present in compile.h
196	UTS_MACHINE := $(ARCH)
197	SRCARCH := $(ARCH)
198
199	# Additional ARCH settings for x86
200	ifeq ($(ARCH),i386)
201	SRCARCH := x86
202	endif
203	ifeq ($(ARCH),x86_64)
204	SRCARCH := x86
205	endif
206
207	# Additional ARCH settings for sparc
208	ifeq ($(ARCH),sparc64)
209	SRCARCH := sparc
210	endif
211
212	# Additional ARCH settings for sh
213	ifeq ($(ARCH),sh64)
214	SRCARCH := sh
215	endif
216
217	# Where to locate arch specific headers
218	hdr-arch := $(SRCARCH)
219
220	ifeq ($(ARCH),m68knommu)
221	hdr-arch := m68k
222	endif
223
224	KCONFIG_CONFIG ?= .config
225
226	# SHELL used by kbuild
227	CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
228	else if [ -x /bin/bash ]; then echo /bin/bash; \
229	else echo sh; fi ; fi)
230
231	HOSTCC = gcc
232	HOSTCXX = g++
233	HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
234	HOSTCXXFLAGS = -O2
235
236	# Decide whether to build built-in, modular, or both.
237	# Normally, just do built-in.
238
239	KBUILD_MODULES :=
240	KBUILD_BUILTIN := 1
241
242	# If we have only "make modules", don't compile built-in objects.
243	# When we're building modules with modversions, we need to consider
244	# the built-in objects during the descend as well, in order to
245	# make sure the checksums are up to date before we record them.
246
247	ifeq ($(MAKECMDGOALS),modules)
248	KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
249	endif
250
251	# If we have "make <whatever> modules", compile modules
252	# in addition to whatever we do anyway.
253	# Just "make" or "make all" shall build modules as well
254
255	ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
256	KBUILD_MODULES := 1
257	endif
258
259	ifeq ($(MAKECMDGOALS),)
260	KBUILD_MODULES := 1
261	endif
262
263	export KBUILD_MODULES KBUILD_BUILTIN
264	export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
265
266	# Beautify output
267	# ---------------------------------------------------------------------------
268	#
269	# Normally, we echo the whole command before executing it. By making
270	# that echo $($(quiet)$(cmd)), we now have the possibility to set
271	# $(quiet) to choose other forms of output instead, e.g.
272	#
273	# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
274	# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
275	#
276	# If $(quiet) is empty, the whole command will be printed.
277	# If it is set to "quiet_", only the short version will be printed.
278	# If it is set to "silent_", nothing will be printed at all, since
279	# the variable $(silent_cmd_cc_o_c) doesn't exist.
280	#
281	# A simple variant is to prefix commands with $(Q) - that's useful
282	# for commands that shall be hidden in non-verbose mode.
283	#
284	# $(Q)ln $@ :<
285	#
286	# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
287	# If KBUILD_VERBOSE equals 1 then the above command is displayed.
288
289	ifeq ($(KBUILD_VERBOSE),1)
290	quiet =
291	Q =
292	else
293	quiet=quiet_
294	Q = @
295	endif
296
297	# If the user is running make -s (silent mode), suppress echoing of
298	# commands
299
300	ifneq ($(findstring s,$(MAKEFLAGS)),)
301	quiet=silent_
302	endif
303
304	export quiet Q KBUILD_VERBOSE
305
306
307	# Look for make include files relative to root of kernel src
308	MAKEFLAGS += --include-dir=$(srctree)
309
310	# We need some generic definitions (do not try to remake the file).
311	$(srctree)/scripts/Kbuild.include: ;
312	include $(srctree)/scripts/Kbuild.include
313
314	# Make variables (CC, etc...)
315
316	AS = $(CROSS_COMPILE)as
317	LD = $(CROSS_COMPILE)ld
318	CC = $(CROSS_COMPILE)gcc
319	CPP = $(CC) -E
320	AR = $(CROSS_COMPILE)ar
321	NM = $(CROSS_COMPILE)nm
322	STRIP = $(CROSS_COMPILE)strip
323	OBJCOPY = $(CROSS_COMPILE)objcopy
324	OBJDUMP = $(CROSS_COMPILE)objdump
325	AWK = awk
326	GENKSYMS = scripts/genksyms/genksyms
327	INSTALLKERNEL := installkernel
328	DEPMOD = /sbin/depmod
329	KALLSYMS = scripts/kallsyms
330	PERL = perl
331	CHECK = sparse
332
333	CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
334	-Wbitwise -Wno-return-void $(CF)
335	MODFLAGS = -DMODULE
336	CFLAGS_MODULE = $(MODFLAGS)
337	AFLAGS_MODULE = $(MODFLAGS)
338	LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
339	CFLAGS_KERNEL =
340	AFLAGS_KERNEL =
341	CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
342
343
344	# Use LINUXINCLUDE when you must reference the include/ directory.
345	# Needed to be compatible with the O= option
346	LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
347	$(if $(KBUILD_SRC), -I$(srctree)/include) \
348	-include include/generated/autoconf.h
349
350	KBUILD_CPPFLAGS := -D__KERNEL__
351
352	KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
353	-fno-strict-aliasing -fno-common \
354	-Werror-implicit-function-declaration \
355	-Wno-format-security \
356	-fno-delete-null-pointer-checks
357	KBUILD_AFLAGS := -D__ASSEMBLY__
358
359	# Read KERNELRELEASE from include/config/kernel.release (if it exists)
360	KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
361	KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
362
363	export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
364	export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
365	export CPP AR NM STRIP OBJCOPY OBJDUMP
366	export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
367	export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
368
369	export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
370	export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
371	export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
372
373	# When compiling out-of-tree modules, put MODVERDIR in the module
374	# tree rather than in the kernel tree. The kernel tree might
375	# even be read-only.
376	export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
377
378	# Files to ignore in find ... statements
379
380	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
381	export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
382
383	# ===========================================================================
384	# Rules shared between *config targets and build targets
385
386	# Basic helpers built in scripts/
387	PHONY += scripts_basic
388	scripts_basic:
389	$(Q)$(MAKE) $(build)=scripts/basic
390	$(Q)rm -f .tmp_quiet_recordmcount
391
392	# To avoid any implicit rule to kick in, define an empty command.
393	scripts/basic/%: scripts_basic ;
394
395	PHONY += outputmakefile
396	# outputmakefile generates a Makefile in the output directory, if using a
397	# separate output directory. This allows convenient use of make in the
398	# output directory.
399	outputmakefile:
400	ifneq ($(KBUILD_SRC),)
401	$(Q)ln -fsn $(srctree) source
402	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
403	$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
404	endif
405
406	# To make sure we do not include .config for any of the *config targets
407	# catch them early, and hand them over to scripts/kconfig/Makefile
408	# It is allowed to specify more targets when calling make, including
409	# mixing *config targets and build targets.
410	# For example 'make oldconfig all'.
411	# Detect when mixed targets is specified, and make a second invocation
412	# of make so .config is not included in this case either (for *config).
413
414	no-dot-config-targets := clean mrproper distclean \
415	cscope TAGS tags help %docs check% \
416	include/linux/version.h headers_% \
417	kernelrelease kernelversion
418
419	config-targets := 0
420	mixed-targets := 0
421	dot-config := 1
422
423	ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
424	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
425	dot-config := 0
426	endif
427	endif
428
429	ifeq ($(KBUILD_EXTMOD),)
430	ifneq ($(filter config %config,$(MAKECMDGOALS)),)
431	config-targets := 1
432	ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
433	mixed-targets := 1
434	endif
435	endif
436	endif
437
438	ifeq ($(mixed-targets),1)
439	# ===========================================================================
440	# We're called with mixed targets (*config and build targets).
441	# Handle them one by one.
442
443	%:: FORCE
444	$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
445
446	else
447	ifeq ($(config-targets),1)
448	# ===========================================================================
449	# *config targets only - make sure prerequisites are updated, and descend
450	# in scripts/kconfig to make the *config target
451
452	# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
453	# KBUILD_DEFCONFIG may point out an alternative default configuration
454	# used for 'make defconfig'
455	include $(srctree)/arch/$(SRCARCH)/Makefile
456	export KBUILD_DEFCONFIG KBUILD_KCONFIG
457
458	config: scripts_basic outputmakefile FORCE
459	$(Q)mkdir -p include/linux include/config
460	$(Q)$(MAKE) $(build)=scripts/kconfig $@
461
462	%config: scripts_basic outputmakefile FORCE
463	$(Q)mkdir -p include/linux include/config
464	$(Q)$(MAKE) $(build)=scripts/kconfig $@
465
466	else
467	# ===========================================================================
468	# Build targets only - this includes vmlinux, arch specific targets, clean
469	# targets and others. In general all targets except *config targets.
470
471	ifeq ($(KBUILD_EXTMOD),)
472	# Additional helpers built in scripts/
473	# Carefully list dependencies so we do not try to build scripts twice
474	# in parallel
475	PHONY += scripts
476	scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
477	$(Q)$(MAKE) $(build)=$(@)
478
479	# Objects we will link into vmlinux / subdirs we need to visit
480	init-y := init/
481	drivers-y := drivers/ sound/ firmware/
482	net-y := net/
483	libs-y := lib/
484	core-y := usr/
485	endif # KBUILD_EXTMOD
486
487	ifeq ($(dot-config),1)
488	# Read in config
489	-include include/config/auto.conf
490
491	ifeq ($(KBUILD_EXTMOD),)
492	# Read in dependencies to all Kconfig* files, make sure to run
493	# oldconfig if changes are detected.
494	-include include/config/auto.conf.cmd
495
496	# To avoid any implicit rule to kick in, define an empty command
497	$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
498
499	# If .config is newer than include/config/auto.conf, someone tinkered
500	# with it and forgot to run make oldconfig.
501	# if auto.conf.cmd is missing then we are probably in a cleaned tree so
502	# we execute the config step to be sure to catch updated Kconfig files
503	include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
504	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
505	else
506	# external modules needs include/generated/autoconf.h and include/config/auto.conf
507	# but do not care if they are up-to-date. Use auto.conf to trigger the test
508	PHONY += include/config/auto.conf
509
510	include/config/auto.conf:
511	$(Q)test -e include/generated/autoconf.h -a -e $@ \|\| ( \
512	echo; \
513	echo " ERROR: Kernel configuration is invalid."; \
514	echo " include/generated/autoconf.h or $@ are missing.";\
515	echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
516	echo; \
517	/bin/false)
518
519	endif # KBUILD_EXTMOD
520
521	else
522	# Dummy target needed, because used as prerequisite
523	include/config/auto.conf: ;
524	endif # $(dot-config)
525
526	# The all: target is the default when no target is given on the
527	# command line.
528	# This allow a user to issue only 'make' to build a kernel including modules
529	# Defaults vmlinux but it is usually overridden in the arch makefile
530	all: vmlinux
531
532	ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
533	KBUILD_CFLAGS += -Os
534	else
535	KBUILD_CFLAGS += -O2
536	endif
537
538	include $(srctree)/arch/$(SRCARCH)/Makefile
539
540	ifneq ($(CONFIG_FRAME_WARN),0)
541	KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
542	endif
543
544	# Force gcc to behave correct even for buggy distributions
545	ifndef CONFIG_CC_STACKPROTECTOR
546	KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
547	endif
548
549	ifdef CONFIG_FRAME_POINTER
550	KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
551	else
552	KBUILD_CFLAGS += -fomit-frame-pointer
553	endif
554
555	ifdef CONFIG_DEBUG_INFO
556	KBUILD_CFLAGS += -g
557	KBUILD_AFLAGS += -gdwarf-2
558	endif
559
560	ifdef CONFIG_FUNCTION_TRACER
561	KBUILD_CFLAGS += -pg
562	endif
563
564	# We trigger additional mismatches with less inlining
565	ifdef CONFIG_DEBUG_SECTION_MISMATCH
566	KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
567	endif
568
569	# arch Makefile may override CC so keep this after arch Makefile is included
570	NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
571	CHECKFLAGS += $(NOSTDINC_FLAGS)
572
573	# warn about C99 declaration after statement
574	KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
575
576	# disable pointer signed / unsigned warnings in gcc 4.0
577	KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
578
579	# disable invalid "can't wrap" optimizations for signed / pointers
580	KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
581
582	# conserve stack if available
583	KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
584
585	# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
586	# But warn user when we do so
587	warn-assign = \
588	$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
589
590	ifneq ($(KCPPFLAGS),)
591	$(call warn-assign,CPPFLAGS)
592	KBUILD_CPPFLAGS += $(KCPPFLAGS)
593	endif
594	ifneq ($(KAFLAGS),)
595	$(call warn-assign,AFLAGS)
596	KBUILD_AFLAGS += $(KAFLAGS)
597	endif
598	ifneq ($(KCFLAGS),)
599	$(call warn-assign,CFLAGS)
600	KBUILD_CFLAGS += $(KCFLAGS)
601	endif
602
603	# Use --build-id when available.
604	LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
605	$(call cc-ldoption, -Wl$(comma)--build-id,))
606	LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
607	LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
608
609	ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
610	LDFLAGS_vmlinux += $(call ld-option, -X,)
611	endif
612
613	# Default kernel image to build when no specific target is given.
614	# KBUILD_IMAGE may be overruled on the command line or
615	# set in the environment
616	# Also any assignments in arch/$(ARCH)/Makefile take precedence over
617	# this default value
618	export KBUILD_IMAGE ?= vmlinux
619
620	#
621	# INSTALL_PATH specifies where to place the updated kernel and system map
622	# images. Default is /boot, but you can set it to other values
623	export INSTALL_PATH ?= /boot
624
625	#
626	# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
627	# relocations required by build roots. This is not defined in the
628	# makefile but the argument can be passed to make if needed.
629	#
630
631	MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
632	export MODLIB
633
634	#
635	# INSTALL_MOD_STRIP, if defined, will cause modules to be
636	# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
637	# the default option --strip-debug will be used. Otherwise,
638	# INSTALL_MOD_STRIP will used as the options to the strip command.
639
640	ifdef INSTALL_MOD_STRIP
641	ifeq ($(INSTALL_MOD_STRIP),1)
642	mod_strip_cmd = $(STRIP) --strip-debug
643	else
644	mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
645	endif # INSTALL_MOD_STRIP=1
646	else
647	mod_strip_cmd = true
648	endif # INSTALL_MOD_STRIP
649	export mod_strip_cmd
650
651
652	ifeq ($(KBUILD_EXTMOD),)
653	core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
654
655	vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
656	$(core-y) $(core-m) $(drivers-y) $(drivers-m) \
657	$(net-y) $(net-m) $(libs-y) $(libs-m)))
658
659	vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
660	$(init-n) $(init-) \
661	$(core-n) $(core-) $(drivers-n) $(drivers-) \
662	$(net-n) $(net-) $(libs-n) $(libs-))))
663
664	init-y := $(patsubst %/, %/built-in.o, $(init-y))
665	core-y := $(patsubst %/, %/built-in.o, $(core-y))
666	drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
667	net-y := $(patsubst %/, %/built-in.o, $(net-y))
668	libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
669	libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
670	libs-y := $(libs-y1) $(libs-y2)
671
672	# Build vmlinux
673	# ---------------------------------------------------------------------------
674	# vmlinux is built from the objects selected by $(vmlinux-init) and
675	# $(vmlinux-main). Most are built-in.o files from top-level directories
676	# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
677	# Ordering when linking is important, and $(vmlinux-init) must be first.
678	#
679	# vmlinux
680	# ^
681	# \|
682	# +-< $(vmlinux-init)
683	# \| +--< init/version.o + more
684	# \|
685	# +--< $(vmlinux-main)
686	# \| +--< driver/built-in.o mm/built-in.o + more
687	# \|
688	# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
689	#
690	# vmlinux version (uname -v) cannot be updated during normal
691	# descending-into-subdirs phase since we do not yet know if we need to
692	# update vmlinux.
693	# Therefore this step is delayed until just before final link of vmlinux -
694	# except in the kallsyms case where it is done just before adding the
695	# symbols to the kernel.
696	#
697	# System.map is generated to document addresses of all kernel symbols
698
699	vmlinux-init := $(head-y) $(init-y)
700	vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
701	vmlinux-all := $(vmlinux-init) $(vmlinux-main)
702	vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
703	export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
704
705	# Rule to link vmlinux - also used during CONFIG_KALLSYMS
706	# May be overridden by arch/$(ARCH)/Makefile
707	quiet_cmd_vmlinux__ ?= LD $@
708	cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
709	-T $(vmlinux-lds) $(vmlinux-init) \
710	--start-group $(vmlinux-main) --end-group \
711	$(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
712
713	# Generate new vmlinux version
714	quiet_cmd_vmlinux_version = GEN .version
715	cmd_vmlinux_version = set -e; \
716	if [ ! -r .version ]; then \
717	rm -f .version; \
718	echo 1 >.version; \
719	else \
720	mv .version .old_version; \
721	expr 0$$(cat .old_version) + 1 >.version; \
722	fi; \
723	$(MAKE) $(build)=init
724
725	# Generate System.map
726	quiet_cmd_sysmap = SYSMAP
727	cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
728
729	# Link of vmlinux
730	# If CONFIG_KALLSYMS is set .version is already updated
731	# Generate System.map and verify that the content is consistent
732	# Use + in front of the vmlinux_version rule to silent warning with make -j2
733	# First command is ':' to allow us to use + in front of the rule
734	define rule_vmlinux__
735	:
736	$(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
737
738	$(call cmd,vmlinux__)
739	$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
740
741	$(Q)$(if $($(quiet)cmd_sysmap), \
742	echo ' $($(quiet)cmd_sysmap) System.map' &&) \
743	$(cmd_sysmap) $@ System.map; \
744	if [ $$? -ne 0 ]; then \
745	rm -f $@; \
746	/bin/false; \
747	fi;
748	$(verify_kallsyms)
749	endef
750
751
752	ifdef CONFIG_KALLSYMS
753	# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
754	# It's a three stage process:
755	# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
756	# empty
757	# Running kallsyms on that gives us .tmp_kallsyms1.o with
758	# the right size - vmlinux version (uname -v) is updated during this step
759	# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
760	# but due to the added section, some addresses have shifted.
761	# From here, we generate a correct .tmp_kallsyms2.o
762	# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
763	# o Verify that the System.map from vmlinux matches the map from
764	# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
765	# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
766	# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
767	# temporary bypass to allow the kernel to be built while the
768	# maintainers work out what went wrong with kallsyms.
769
770	ifdef CONFIG_KALLSYMS_EXTRA_PASS
771	last_kallsyms := 3
772	else
773	last_kallsyms := 2
774	endif
775
776	kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
777
778	define verify_kallsyms
779	$(Q)$(if $($(quiet)cmd_sysmap), \
780	echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
781	$(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
782	$(Q)cmp -s System.map .tmp_System.map \|\| \
783	(echo Inconsistent kallsyms data; \
784	echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
785	rm .tmp_kallsyms* ; /bin/false )
786	endef
787
788	# Update vmlinux version before link
789	# Use + in front of this rule to silent warning about make -j1
790	# First command is ':' to allow us to use + in front of this rule
791	cmd_ksym_ld = $(cmd_vmlinux__)
792	define rule_ksym_ld
793	:
794	+$(call cmd,vmlinux_version)
795	$(call cmd,vmlinux__)
796	$(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
797	endef
798
799	# Generate .S file with all kernel symbols
800	quiet_cmd_kallsyms = KSYM $@
801	cmd_kallsyms = $(NM) -n $< \| $(KALLSYMS) \
802	$(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
803
804	.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
805	$(call if_changed_dep,as_o_S)
806
807	.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
808	$(call cmd,kallsyms)
809
810	# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
811	.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
812	$(call if_changed_rule,ksym_ld)
813
814	.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
815	$(call if_changed,vmlinux__)
816
817	.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
818	$(call if_changed,vmlinux__)
819
820	# Needs to visit scripts/ before $(KALLSYMS) can be used.
821	$(KALLSYMS): scripts ;
822
823	# Generate some data for debugging strange kallsyms problems
824	debug_kallsyms: .tmp_map$(last_kallsyms)
825
826	.tmp_map%: .tmp_vmlinux% FORCE
827	($(OBJDUMP) -h $< \| $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) \| sort > $@
828
829	.tmp_map3: .tmp_map2
830
831	.tmp_map2: .tmp_map1
832
833	endif # ifdef CONFIG_KALLSYMS
834
835	# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
836	# relevant sections renamed as per the linker script.
837	quiet_cmd_vmlinux-modpost = LD $@
838	cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
839	$(vmlinux-init) --start-group $(vmlinux-main) --end-group \
840	$(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
841	define rule_vmlinux-modpost
842	:
843	+$(call cmd,vmlinux-modpost)
844	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
845	$(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
846	endef
847
848	# vmlinux image - including updated kernel symbols
849	vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
850	ifdef CONFIG_HEADERS_CHECK
851	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
852	endif
853	ifdef CONFIG_SAMPLES
854	$(Q)$(MAKE) $(build)=samples
855	endif
856	ifdef CONFIG_BUILD_DOCSRC
857	$(Q)$(MAKE) $(build)=Documentation
858	endif
859	$(call vmlinux-modpost)
860	$(call if_changed_rule,vmlinux__)
861	$(Q)rm -f .old_version
862
863	# build vmlinux.o first to catch section mismatch errors early
864	ifdef CONFIG_KALLSYMS
865	.tmp_vmlinux1: vmlinux.o
866	endif
867
868	modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
869	vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
870	$(call if_changed_rule,vmlinux-modpost)
871
872	# The actual objects are generated when descending,
873	# make sure no implicit rule kicks in
874	$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
875
876	# Handle descending into subdirectories listed in $(vmlinux-dirs)
877	# Preset locale variables to speed up the build process. Limit locale
878	# tweaks to this spot to avoid wrong language settings when running
879	# make menuconfig etc.
880	# Error messages still appears in the original language
881
882	PHONY += $(vmlinux-dirs)
883	$(vmlinux-dirs): prepare scripts
884	$(Q)$(MAKE) $(build)=$@
885
886	# Store (new) KERNELRELASE string in include/config/kernel.release
887	include/config/kernel.release: include/config/auto.conf FORCE
888	$(Q)rm -f $@
889	$(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
890
891
892	# Things we need to do before we recursively start building the kernel
893	# or the modules are listed in "prepare".
894	# A multi level approach is used. prepareN is processed before prepareN-1.
895	# archprepare is used in arch Makefiles and when processed asm symlink,
896	# version.h and scripts_basic is processed / created.
897
898	# Listed in dependency order
899	PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
900
901	# prepare3 is used to check if we are building in a separate output directory,
902	# and if so do:
903	# 1) Check that make has not been executed in the kernel src $(srctree)
904	prepare3: include/config/kernel.release
905	ifneq ($(KBUILD_SRC),)
906	@$(kecho) ' Using $(srctree) as source for kernel'
907	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
908	echo " $(srctree) is not clean, please run 'make mrproper'";\
909	echo " in the '$(srctree)' directory.";\
910	/bin/false; \
911	fi;
912	endif
913
914	# prepare2 creates a makefile if using a separate output directory
915	prepare2: prepare3 outputmakefile
916
917	prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
918	include/config/auto.conf
919	$(cmd_crmodverdir)
920
921	archprepare: prepare1 scripts_basic
922
923	prepare0: archprepare FORCE
924	$(Q)$(MAKE) $(build)=.
925	$(Q)$(MAKE) $(build)=. missing-syscalls
926
927	# All the preparing..
928	prepare: prepare0
929
930	# Generate some files
931	# ---------------------------------------------------------------------------
932
933	# KERNELRELEASE can change from a few different places, meaning version.h
934	# needs to be updated, so this check is forced on all builds
935
936	uts_len := 64
937	define filechk_utsrelease.h
938	if [ `echo -n "$(KERNELRELEASE)" \| wc -c ` -gt $(uts_len) ]; then \
939	echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
940	exit 1; \
941	fi; \
942	(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
943	endef
944
945	define filechk_version.h
946	(echo \#define LINUX_VERSION_CODE $(shell \
947	expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
948	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
949	endef
950
951	include/linux/version.h: $(srctree)/Makefile FORCE
952	$(call filechk,version.h)
953
954	include/generated/utsrelease.h: include/config/kernel.release FORCE
955	$(call filechk,utsrelease.h)
956
957	PHONY += headerdep
958	headerdep:
959	$(Q)find include/ -name '*.h' \| xargs --max-args 1 scripts/headerdep.pl
960
961	# ---------------------------------------------------------------------------
962
963	PHONY += depend dep
964	depend dep:
965	@echo '*** Warning: make $@ is unnecessary now.'
966
967	# ---------------------------------------------------------------------------
968	# Firmware install
969	INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
970	export INSTALL_FW_PATH
971
972	PHONY += firmware_install
973	firmware_install: FORCE
974	@mkdir -p $(objtree)/firmware
975	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
976
977	# ---------------------------------------------------------------------------
978	# Kernel headers
979
980	#Default location for installed headers
981	export INSTALL_HDR_PATH = $(objtree)/usr
982
983	hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
984
985	# If we do an all arch process set dst to asm-$(hdr-arch)
986	hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
987
988	PHONY += __headers
989	__headers: include/linux/version.h scripts_basic FORCE
990	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
991
992	PHONY += headers_install_all
993	headers_install_all:
994	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
995
996	PHONY += headers_install
997	headers_install: __headers
998	$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
999	$(error Headers not exportable for the $(SRCARCH) architecture))
1000	$(Q)$(MAKE) $(hdr-inst)=include
1001	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
1002
1003	PHONY += headers_check_all
1004	headers_check_all: headers_install_all
1005	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1006
1007	PHONY += headers_check
1008	headers_check: headers_install
1009	$(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1010	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
1011
1012	# ---------------------------------------------------------------------------
1013	# Modules
1014
1015	ifdef CONFIG_MODULES
1016
1017	# By default, build modules as well
1018
1019	all: modules
1020
1021	# Build modules
1022	#
1023	# A module can be listed more than once in obj-m resulting in
1024	# duplicate lines in modules.order files. Those are removed
1025	# using awk while concatenating to the final file.
1026
1027	PHONY += modules
1028	modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1029	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1030	@$(kecho) ' Building modules, stage 2.';
1031	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1032	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1033
1034	modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1035	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1036
1037	%/modules.builtin: include/config/auto.conf
1038	$(Q)$(MAKE) $(modbuiltin)=$*
1039
1040
1041	# Target to prepare building external modules
1042	PHONY += modules_prepare
1043	modules_prepare: prepare scripts
1044
1045	# Target to install modules
1046	PHONY += modules_install
1047	modules_install: _modinst_ _modinst_post
1048
1049	PHONY += _modinst_
1050	_modinst_:
1051	@if [ -z "`$(DEPMOD) -V 2>/dev/null \| grep module-init-tools`" ]; then \
1052	echo "Warning: you may need to install module-init-tools"; \
1053	echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1054	sleep 1; \
1055	fi
1056	@rm -rf $(MODLIB)/kernel
1057	@rm -f $(MODLIB)/source
1058	@mkdir -p $(MODLIB)/kernel
1059	@ln -s $(srctree) $(MODLIB)/source
1060	@if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1061	rm -f $(MODLIB)/build ; \
1062	ln -s $(objtree) $(MODLIB)/build ; \
1063	fi
1064	@cp -f $(objtree)/modules.order $(MODLIB)/
1065	@cp -f $(objtree)/modules.builtin $(MODLIB)/
1066	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1067
1068	# This depmod is only for convenience to give the initial
1069	# boot a modules.dep even before / is mounted read-write. However the
1070	# boot script depmod is the master version.
1071	PHONY += _modinst_post
1072	_modinst_post: _modinst_
1073	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1074	$(call cmd,depmod)
1075
1076	else # CONFIG_MODULES
1077
1078	# Modules not configured
1079	# ---------------------------------------------------------------------------
1080
1081	modules modules_install: FORCE
1082	@echo
1083	@echo "The present kernel configuration has modules disabled."
1084	@echo "Type 'make config' and enable loadable module support."
1085	@echo "Then build a kernel with module support enabled."
1086	@echo
1087	@exit 1
1088
1089	endif # CONFIG_MODULES
1090
1091	###
1092	# Cleaning is done on three levels.
1093	# make clean Delete most generated files
1094	# Leave enough to build external modules
1095	# make mrproper Delete the current configuration, and all generated files
1096	# make distclean Remove editor backup files, patch leftover files and the like
1097
1098	# Directories & files removed with 'make clean'
1099	CLEAN_DIRS += $(MODVERDIR)
1100	CLEAN_FILES += vmlinux System.map \
1101	.tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1102
1103	# Directories & files removed with 'make mrproper'
1104	MRPROPER_DIRS += include/config usr/include include/generated
1105	MRPROPER_FILES += .config .config.old .version .old_version \
1106	include/linux/version.h \
1107	Module.symvers tags TAGS cscope*
1108
1109	# clean - Delete most, but leave enough to build external modules
1110	#
1111	clean: rm-dirs := $(CLEAN_DIRS)
1112	clean: rm-files := $(CLEAN_FILES)
1113	clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1114
1115	PHONY += $(clean-dirs) clean archclean
1116	$(clean-dirs):
1117	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1118
1119	clean: archclean $(clean-dirs)
1120	$(call cmd,rmdirs)
1121	$(call cmd,rmfiles)
1122	@find . $(RCS_FIND_IGNORE) \
1123	\( -name '.[oas]' -o -name '.ko' -o -name '.*.cmd' \
1124	-o -name '..d' -o -name '..tmp' -o -name '*.mod.c' \
1125	-o -name '*.symtypes' -o -name 'modules.order' \
1126	-o -name modules.builtin -o -name '.tmp_.o.' \
1127	-o -name '*.gcno' \) -type f -print \| xargs rm -f
1128
1129	# mrproper - Delete all generated files, including .config
1130	#
1131	mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1132	mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1133	mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1134
1135	PHONY += $(mrproper-dirs) mrproper archmrproper
1136	$(mrproper-dirs):
1137	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1138
1139	mrproper: clean archmrproper $(mrproper-dirs)
1140	$(call cmd,rmdirs)
1141	$(call cmd,rmfiles)
1142
1143	# distclean
1144	#
1145	PHONY += distclean
1146
1147	distclean: mrproper
1148	@find $(srctree) $(RCS_FIND_IGNORE) \
1149	\( -name '.orig' -o -name '.rej' -o -name '*~' \
1150	-o -name '.bak' -o -name '##' -o -name '.*.orig' \
1151	-o -name '.*.rej' -o -size 0 \
1152	-o -name '%' -o -name '..cmd' -o -name 'core' \) \
1153	-type f -print \| xargs rm -f
1154
1155
1156	# Packaging of the kernel to various formats
1157	# ---------------------------------------------------------------------------
1158	# rpm target kept for backward compatibility
1159	package-dir := $(srctree)/scripts/package
1160
1161	%pkg: include/config/kernel.release FORCE
1162	$(Q)$(MAKE) $(build)=$(package-dir) $@
1163	rpm: include/config/kernel.release FORCE
1164	$(Q)$(MAKE) $(build)=$(package-dir) $@
1165
1166
1167	# Brief documentation of the typical targets used
1168	# ---------------------------------------------------------------------------
1169
1170	boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1171	boards := $(notdir $(boards))
1172	board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs//_defconfig))
1173	board-dirs := $(sort $(notdir $(board-dirs:/=)))
1174
1175	help:
1176	@echo 'Cleaning targets:'
1177	@echo ' clean - Remove most generated files but keep the config and'
1178	@echo ' enough build support to build external modules'
1179	@echo ' mrproper - Remove all generated files + config + various backup files'
1180	@echo ' distclean - mrproper + remove editor backup and patch files'
1181	@echo ''
1182	@echo 'Configuration targets:'
1183	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1184	@echo ''
1185	@echo 'Other generic targets:'
1186	@echo ' all - Build all targets marked with [*]'
1187	@echo '* vmlinux - Build the bare kernel'
1188	@echo '* modules - Build all modules'
1189	@echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1190	@echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1191	@echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1192	@echo ' dir/ - Build all files in dir and below'
1193	@echo ' dir/file.[oisS] - Build specified target only'
1194	@echo ' dir/file.lst - Build specified mixed source/assembly target only'
1195	@echo ' (requires a recent binutils and recent build (System.map))'
1196	@echo ' dir/file.ko - Build module including final link'
1197	@echo ' modules_prepare - Set up for building external modules'
1198	@echo ' tags/TAGS - Generate tags file for editors'
1199	@echo ' cscope - Generate cscope index'
1200	@echo ' kernelrelease - Output the release version string'
1201	@echo ' kernelversion - Output the version stored in Makefile'
1202	@echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1203	echo ' (default: $(INSTALL_HDR_PATH))'; \
1204	echo ''
1205	@echo 'Static analysers'
1206	@echo ' checkstack - Generate a list of stack hogs'
1207	@echo ' namespacecheck - Name space analysis on compiled kernel'
1208	@echo ' versioncheck - Sanity check on version.h usage'
1209	@echo ' includecheck - Check for duplicate included header files'
1210	@echo ' export_report - List the usages of all exported symbols'
1211	@echo ' headers_check - Sanity check on exported headers'
1212	@echo ' headerdep - Detect inclusion cycles in headers'; \
1213	echo ''
1214	@echo 'Kernel packaging:'
1215	@$(MAKE) $(build)=$(package-dir) help
1216	@echo ''
1217	@echo 'Documentation targets:'
1218	@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1219	@echo ''
1220	@echo 'Architecture specific targets ($(SRCARCH)):'
1221	@$(if $(archhelp),$(archhelp),\
1222	echo ' No architecture specific help defined for $(SRCARCH)')
1223	@echo ''
1224	@$(if $(boards), \
1225	$(foreach b, $(boards), \
1226	printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1227	echo '')
1228	@$(if $(board-dirs), \
1229	$(foreach b, $(board-dirs), \
1230	printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1231	printf " %-16s - Show all of the above\\n" help-boards; \
1232	echo '')
1233
1234	@echo ' make V=0\|1 [targets] 0 => quiet build (default), 1 => verbose build'
1235	@echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1236	@echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1237	@echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1238	@echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1239	@echo ''
1240	@echo 'Execute "make" or "make all" to build all targets marked with [*] '
1241	@echo 'For further info see the ./README file'
1242
1243
1244	help-board-dirs := $(addprefix help-,$(board-dirs))
1245
1246	help-boards: $(help-board-dirs)
1247
1248	boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$/_defconfig))
1249
1250	$(help-board-dirs): help-%:
1251	@echo 'Architecture specific targets ($(SRCARCH) $*):'
1252	@$(if $(boards-per-dir), \
1253	$(foreach b, $(boards-per-dir), \
1254	printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1255	echo '')
1256
1257
1258	# Documentation targets
1259	# ---------------------------------------------------------------------------
1260	%docs: scripts_basic FORCE
1261	$(Q)$(MAKE) $(build)=Documentation/DocBook $@
1262
1263	else # KBUILD_EXTMOD
1264
1265	###
1266	# External module support.
1267	# When building external modules the kernel used as basis is considered
1268	# read-only, and no consistency checks are made and the make
1269	# system is not used on the basis kernel. If updates are required
1270	# in the basis kernel ordinary make commands (without M=...) must
1271	# be used.
1272	#
1273	# The following are the only valid targets when building external
1274	# modules.
1275	# make M=dir clean Delete all automatically generated files
1276	# make M=dir modules Make all modules in specified dir
1277	# make M=dir Same as 'make M=dir modules'
1278	# make M=dir modules_install
1279	# Install the modules built in the module directory
1280	# Assumes install directory is already created
1281
1282	# We are always building modules
1283	KBUILD_MODULES := 1
1284	PHONY += crmodverdir
1285	crmodverdir:
1286	$(cmd_crmodverdir)
1287
1288	PHONY += $(objtree)/Module.symvers
1289	$(objtree)/Module.symvers:
1290	@test -e $(objtree)/Module.symvers \|\| ( \
1291	echo; \
1292	echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1293	echo " is missing; modules will have no dependencies and modversions."; \
1294	echo )
1295
1296	module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1297	PHONY += $(module-dirs) modules
1298	$(module-dirs): crmodverdir $(objtree)/Module.symvers
1299	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1300
1301	modules: $(module-dirs)
1302	@$(kecho) ' Building modules, stage 2.';
1303	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1304
1305	PHONY += modules_install
1306	modules_install: _emodinst_ _emodinst_post
1307
1308	install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1309	PHONY += _emodinst_
1310	_emodinst_:
1311	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1312	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1313
1314	PHONY += _emodinst_post
1315	_emodinst_post: _emodinst_
1316	$(call cmd,depmod)
1317
1318	clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1319
1320	PHONY += $(clean-dirs) clean
1321	$(clean-dirs):
1322	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1323
1324	clean: rm-dirs := $(MODVERDIR)
1325	clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1326	$(KBUILD_EXTMOD)/modules.order \
1327	$(KBUILD_EXTMOD)/modules.builtin
1328	clean: $(clean-dirs)
1329	$(call cmd,rmdirs)
1330	$(call cmd,rmfiles)
1331	@find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1332	\( -name '.[oas]' -o -name '.ko' -o -name '.*.cmd' \
1333	-o -name '..d' -o -name '..tmp' -o -name '*.mod.c' \
1334	-o -name '*.gcno' \) -type f -print \| xargs rm -f
1335
1336	help:
1337	@echo ' Building external modules.'
1338	@echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1339	@echo ''
1340	@echo ' modules - default target, build the module(s)'
1341	@echo ' modules_install - install the module'
1342	@echo ' clean - remove generated files in module directory only'
1343	@echo ''
1344
1345	# Dummies...
1346	PHONY += prepare scripts
1347	prepare: ;
1348	scripts: ;
1349	endif # KBUILD_EXTMOD
1350
1351	# Generate tags for editors
1352	# ---------------------------------------------------------------------------
1353	quiet_cmd_tags = GEN $@
1354	cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1355
1356	tags TAGS cscope: FORCE
1357	$(call cmd,tags)
1358
1359	# Scripts to check various things for consistency
1360	# ---------------------------------------------------------------------------
1361
1362	includecheck:
1363	find * $(RCS_FIND_IGNORE) \
1364	-name '*.[hcS]' -type f -print \| sort \
1365	\| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1366
1367	versioncheck:
1368	find * $(RCS_FIND_IGNORE) \
1369	-name '*.[hcS]' -type f -print \| sort \
1370	\| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1371
1372	namespacecheck:
1373	$(PERL) $(srctree)/scripts/namespace.pl
1374
1375	export_report:
1376	$(PERL) $(srctree)/scripts/export_report.pl
1377
1378	endif #ifeq ($(config-targets),1)
1379	endif #ifeq ($(mixed-targets),1)
1380
1381	PHONY += checkstack kernelrelease kernelversion
1382
1383	# UML needs a little special treatment here. It wants to use the host
1384	# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1385	# else wants $(ARCH), including people doing cross-builds, which means
1386	# that $(SUBARCH) doesn't work here.
1387	ifeq ($(ARCH), um)
1388	CHECKSTACK_ARCH := $(SUBARCH)
1389	else
1390	CHECKSTACK_ARCH := $(ARCH)
1391	endif
1392	checkstack:
1393	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') \| \
1394	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1395
1396	kernelrelease:
1397	$(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1398	$(error kernelrelease not valid - run 'make prepare' to update it))
1399	kernelversion:
1400	@echo $(KERNELVERSION)
1401
1402	# Single targets
1403	# ---------------------------------------------------------------------------
1404	# Single targets are compatible with:
1405	# - build with mixed source and output
1406	# - build with separate output dir 'make O=...'
1407	# - external modules
1408	#
1409	# target-dir => where to store outputfile
1410	# build-dir => directory in kernel source tree to use
1411
1412	ifeq ($(KBUILD_EXTMOD),)
1413	build-dir = $(patsubst %/,%,$(dir $@))
1414	target-dir = $(dir $@)
1415	else
1416	zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1417	build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1418	target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1419	endif
1420
1421	%.s: %.c prepare scripts FORCE
1422	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1423	%.i: %.c prepare scripts FORCE
1424	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1425	%.o: %.c prepare scripts FORCE
1426	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1427	%.lst: %.c prepare scripts FORCE
1428	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1429	%.s: %.S prepare scripts FORCE
1430	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1431	%.o: %.S prepare scripts FORCE
1432	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1433	%.symtypes: %.c prepare scripts FORCE
1434	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1435
1436	# Modules
1437	/: prepare scripts FORCE
1438	$(cmd_crmodverdir)
1439	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1440	$(build)=$(build-dir)
1441	%/: prepare scripts FORCE
1442	$(cmd_crmodverdir)
1443	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1444	$(build)=$(build-dir)
1445	%.ko: prepare scripts FORCE
1446	$(cmd_crmodverdir)
1447	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1448	$(build)=$(build-dir) $(@:.ko=.o)
1449	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1450
1451	# FIXME Should go into a make.lib or something
1452	# ===========================================================================
1453
1454	quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1455	cmd_rmdirs = rm -rf $(rm-dirs)
1456
1457	quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1458	cmd_rmfiles = rm -f $(rm-files)
1459
1460	# Run depmod only if we have System.map and depmod is executable
1461	quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1462	cmd_depmod = \
1463	if [ -r System.map -a -x $(DEPMOD) ]; then \
1464	$(DEPMOD) -ae -F System.map \
1465	$(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
1466	$(KERNELRELEASE); \
1467	fi
1468
1469	# Create temporary dir for module support files
1470	# clean it up only when building all modules
1471	cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1472	$(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1473
1474	a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1475	$(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1476	$(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1477
1478	quiet_cmd_as_o_S = AS $@
1479	cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1480
1481	# read all saved command lines
1482
1483	targets := $(wildcard $(sort $(targets)))
1484	cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1485
1486	ifneq ($(cmd_files),)
1487	$(cmd_files): ; # Do not try to update included dependency files
1488	include $(cmd_files)
1489	endif
1490
1491	# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1492	# Usage:
1493	# $(Q)$(MAKE) $(clean)=dir
1494	clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1495
1496	endif # skip-makefile
1497
1498	PHONY += FORCE
1499	FORCE:
1500
1501	# Declare the contents of the .PHONY variable as phony. We keep that
1502	# information in a variable so we can use it in if_changed and friends.
1503	.PHONY: $(PHONY)
1504

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