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[PATCH] Kconfig refactoring for better menu nesting
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1da177e4
LT
1VERSION = 2
2PATCHLEVEL = 6
d223a601 3SUBLEVEL = 19
0215ffb0 4EXTRAVERSION =
e478bec0 5NAME=Avast! A bilge rat!
1da177e4
LT
6
7# *DOCUMENTATION*
8# To see a list of typical targets execute "make help"
9# More info can be located in ./README
10# Comments in this file are targeted only to the developer, do not
11# expect to learn how to build the kernel reading this file.
12
13# Do not print "Entering directory ..."
14MAKEFLAGS += --no-print-directory
15
16# We are using a recursive build, so we need to do a little thinking
17# to get the ordering right.
18#
19# Most importantly: sub-Makefiles should only ever modify files in
20# their own directory. If in some directory we have a dependency on
21# a file in another dir (which doesn't happen often, but it's often
22# unavoidable when linking the built-in.o targets which finally
23# turn into vmlinux), we will call a sub make in that other dir, and
24# after that we are sure that everything which is in that other dir
25# is now up to date.
26#
27# The only cases where we need to modify files which have global
28# effects are thus separated out and done before the recursive
29# descending is started. They are now explicitly listed as the
30# prepare rule.
31
32# To put more focus on warnings, be less verbose as default
33# Use 'make V=1' to see the full commands
34
35ifdef V
36 ifeq ("$(origin V)", "command line")
37 KBUILD_VERBOSE = $(V)
38 endif
39endif
40ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42endif
43
1c7bafe7
RD
44# Call a source code checker (by default, "sparse") as part of the
45# C compilation.
46#
47# Use 'make C=1' to enable checking of only re-compiled files.
48# Use 'make C=2' to enable checking of *all* source files, regardless
49# of whether they are re-compiled or not.
50#
51# See the file "Documentation/sparse.txt" for more details, including
52# where to get the "sparse" utility.
1da177e4
LT
53
54ifdef C
55 ifeq ("$(origin C)", "command line")
56 KBUILD_CHECKSRC = $(C)
57 endif
58endif
59ifndef KBUILD_CHECKSRC
60 KBUILD_CHECKSRC = 0
61endif
62
63# Use make M=dir to specify directory of external module to build
64# Old syntax make ... SUBDIRS=$PWD is still supported
65# Setting the environment variable KBUILD_EXTMOD take precedence
66ifdef SUBDIRS
67 KBUILD_EXTMOD ?= $(SUBDIRS)
68endif
69ifdef M
70 ifeq ("$(origin M)", "command line")
71 KBUILD_EXTMOD := $(M)
72 endif
73endif
74
75
76# kbuild supports saving output files in a separate directory.
77# To locate output files in a separate directory two syntaxes are supported.
78# In both cases the working directory must be the root of the kernel src.
79# 1) O=
80# Use "make O=dir/to/store/output/files/"
070b98bf 81#
1da177e4
LT
82# 2) Set KBUILD_OUTPUT
83# Set the environment variable KBUILD_OUTPUT to point to the directory
84# where the output files shall be placed.
85# export KBUILD_OUTPUT=dir/to/store/output/files/
86# make
87#
88# The O= assignment takes precedence over the KBUILD_OUTPUT environment
89# variable.
90
91
92# KBUILD_SRC is set on invocation of make in OBJ directory
93# KBUILD_SRC is not intended to be used by the regular user (for now)
94ifeq ($(KBUILD_SRC),)
95
96# OK, Make called in directory where kernel src resides
97# Do we want to locate output files in a separate directory?
98ifdef O
99 ifeq ("$(origin O)", "command line")
100 KBUILD_OUTPUT := $(O)
101 endif
102endif
103
104# That's our default target when none is given on the command line
4f193362 105PHONY := _all
1da177e4
LT
106_all:
107
108ifneq ($(KBUILD_OUTPUT),)
109# Invoke a second make in the output directory, passing relevant variables
110# check that the output directory actually exists
111saved-output := $(KBUILD_OUTPUT)
112KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
113$(if $(KBUILD_OUTPUT),, \
114 $(error output directory "$(saved-output)" does not exist))
115
4f193362 116PHONY += $(MAKECMDGOALS)
1da177e4 117
36cbbe5e 118$(filter-out _all,$(MAKECMDGOALS)) _all:
23a45e2c
SR
119 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
120 KBUILD_SRC=$(CURDIR) \
36cbbe5e 121 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
1da177e4
LT
122
123# Leave processing to above invocation of make
124skip-makefile := 1
125endif # ifneq ($(KBUILD_OUTPUT),)
126endif # ifeq ($(KBUILD_SRC),)
127
128# We process the rest of the Makefile if this is the final invocation of make
129ifeq ($(skip-makefile),)
130
131# If building an external module we do not care about the all: rule
132# but instead _all depend on modules
4f193362 133PHONY += all
1da177e4
LT
134ifeq ($(KBUILD_EXTMOD),)
135_all: all
136else
137_all: modules
138endif
139
140srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
141TOPDIR := $(srctree)
142# FIXME - TOPDIR is obsolete, use srctree/objtree
143objtree := $(CURDIR)
144src := $(srctree)
145obj := $(objtree)
146
0f558c33 147VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1da177e4
LT
148
149export srctree objtree VPATH TOPDIR
150
1da177e4
LT
151
152# SUBARCH tells the usermode build what the underlying arch is. That is set
153# first, and if a usermode build is happening, the "ARCH=um" on the command
154# line overrides the setting of ARCH below. If a native build is happening,
155# then ARCH is assigned, getting whatever value it gets normally, and
156# SUBARCH is subsequently ignored.
157
158SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
159 -e s/arm.*/arm/ -e s/sa110/arm/ \
39990b5e 160 -e s/s390x/s390/ -e s/parisc64/parisc/ \
8999257c 161 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
1da177e4
LT
162
163# Cross compiling and selecting different set of gcc/bin-utils
164# ---------------------------------------------------------------------------
165#
166# When performing cross compilation for other architectures ARCH shall be set
167# to the target architecture. (See arch/* for the possibilities).
168# ARCH can be set during invocation of make:
169# make ARCH=ia64
170# Another way is to have ARCH set in the environment.
171# The default ARCH is the host where make is executed.
172
173# CROSS_COMPILE specify the prefix used for all executables used
174# during compilation. Only gcc and related bin-utils executables
175# are prefixed with $(CROSS_COMPILE).
176# CROSS_COMPILE can be set on the command line
177# make CROSS_COMPILE=ia64-linux-
178# Alternatively CROSS_COMPILE can be set in the environment.
179# Default value for CROSS_COMPILE is not to prefix executables
180# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
181
182ARCH ?= $(SUBARCH)
183CROSS_COMPILE ?=
184
185# Architecture as present in compile.h
186UTS_MACHINE := $(ARCH)
187
14cdd3c4
RZ
188KCONFIG_CONFIG ?= .config
189
1da177e4
LT
190# SHELL used by kbuild
191CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
192 else if [ -x /bin/bash ]; then echo /bin/bash; \
193 else echo sh; fi ; fi)
194
070b98bf
SR
195HOSTCC = gcc
196HOSTCXX = g++
197HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
198HOSTCXXFLAGS = -O2
1da177e4 199
070b98bf
SR
200# Decide whether to build built-in, modular, or both.
201# Normally, just do built-in.
1da177e4
LT
202
203KBUILD_MODULES :=
204KBUILD_BUILTIN := 1
205
206# If we have only "make modules", don't compile built-in objects.
207# When we're building modules with modversions, we need to consider
208# the built-in objects during the descend as well, in order to
070b98bf 209# make sure the checksums are up to date before we record them.
1da177e4
LT
210
211ifeq ($(MAKECMDGOALS),modules)
212 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
213endif
214
215# If we have "make <whatever> modules", compile modules
216# in addition to whatever we do anyway.
217# Just "make" or "make all" shall build modules as well
218
219ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
220 KBUILD_MODULES := 1
221endif
222
223ifeq ($(MAKECMDGOALS),)
224 KBUILD_MODULES := 1
225endif
226
e579d351 227export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
228export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
229
230# Beautify output
231# ---------------------------------------------------------------------------
232#
233# Normally, we echo the whole command before executing it. By making
234# that echo $($(quiet)$(cmd)), we now have the possibility to set
235# $(quiet) to choose other forms of output instead, e.g.
236#
237# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
238# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
239#
240# If $(quiet) is empty, the whole command will be printed.
241# If it is set to "quiet_", only the short version will be printed.
070b98bf 242# If it is set to "silent_", nothing will be printed at all, since
1da177e4
LT
243# the variable $(silent_cmd_cc_o_c) doesn't exist.
244#
a58a414f 245# A simple variant is to prefix commands with $(Q) - that's useful
1da177e4
LT
246# for commands that shall be hidden in non-verbose mode.
247#
248# $(Q)ln $@ :<
249#
250# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
251# If KBUILD_VERBOSE equals 1 then the above command is displayed.
252
253ifeq ($(KBUILD_VERBOSE),1)
254 quiet =
255 Q =
256else
257 quiet=quiet_
258 Q = @
259endif
260
261# If the user is running make -s (silent mode), suppress echoing of
262# commands
263
264ifneq ($(findstring s,$(MAKEFLAGS)),)
265 quiet=silent_
266endif
267
268export quiet Q KBUILD_VERBOSE
269
1da177e4
LT
270
271# Look for make include files relative to root of kernel src
272MAKEFLAGS += --include-dir=$(srctree)
273
8ec4b4ff 274# We need some generic definitions
2a691470 275include $(srctree)/scripts/Kbuild.include
8ec4b4ff 276
566f81ca 277# Do not use make's built-in rules and variables
070b98bf 278# This increases performance and avoid hard-to-debug behavour
566f81ca 279MAKEFLAGS += -rR
1da177e4
LT
280
281# Make variables (CC, etc...)
282
283AS = $(CROSS_COMPILE)as
284LD = $(CROSS_COMPILE)ld
285CC = $(CROSS_COMPILE)gcc
286CPP = $(CC) -E
287AR = $(CROSS_COMPILE)ar
288NM = $(CROSS_COMPILE)nm
289STRIP = $(CROSS_COMPILE)strip
290OBJCOPY = $(CROSS_COMPILE)objcopy
291OBJDUMP = $(CROSS_COMPILE)objdump
292AWK = awk
293GENKSYMS = scripts/genksyms/genksyms
294DEPMOD = /sbin/depmod
295KALLSYMS = scripts/kallsyms
296PERL = perl
297CHECK = sparse
298
af4ca457 299CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
1da177e4
LT
300MODFLAGS = -DMODULE
301CFLAGS_MODULE = $(MODFLAGS)
302AFLAGS_MODULE = $(MODFLAGS)
303LDFLAGS_MODULE = -r
304CFLAGS_KERNEL =
305AFLAGS_KERNEL =
306
307
308# Use LINUXINCLUDE when you must reference the include/ directory.
309# Needed to be compatible with the O= option
310LINUXINCLUDE := -Iinclude \
2dd34b48 311 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
e623a3b8 312 -include include/linux/autoconf.h
1da177e4
LT
313
314CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
315
070b98bf
SR
316CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
317 -fno-strict-aliasing -fno-common
318AFLAGS := -D__ASSEMBLY__
1da177e4 319
f1d28fb0
RZ
320# Read KERNELRELEASE from include/config/kernel.release (if it exists)
321KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
2244cbd8 322KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
cb58455c 323
070b98bf
SR
324export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
325export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
326export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
327export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4
LT
328
329export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
070b98bf 330export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
1da177e4
LT
331export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
332
333# When compiling out-of-tree modules, put MODVERDIR in the module
334# tree rather than in the kernel tree. The kernel tree might
335# even be read-only.
336export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
337
1da177e4
LT
338# Files to ignore in find ... statements
339
406119f4
TM
340RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
341export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
342
343# ===========================================================================
344# Rules shared between *config targets and build targets
345
346# Basic helpers built in scripts/
4f193362 347PHONY += scripts_basic
1da177e4
LT
348scripts_basic:
349 $(Q)$(MAKE) $(build)=scripts/basic
350
cd05e6bd
JB
351# To avoid any implicit rule to kick in, define an empty command.
352scripts/basic/%: scripts_basic ;
353
4f193362 354PHONY += outputmakefile
fd5f0cd6
JB
355# outputmakefile generates a Makefile in the output directory, if using a
356# separate output directory. This allows convenient use of make in the
357# output directory.
1da177e4 358outputmakefile:
fd5f0cd6
JB
359ifneq ($(KBUILD_SRC),)
360 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
361 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
362endif
1da177e4
LT
363
364# To make sure we do not include .config for any of the *config targets
365# catch them early, and hand them over to scripts/kconfig/Makefile
366# It is allowed to specify more targets when calling make, including
367# mixing *config targets and build targets.
070b98bf 368# For example 'make oldconfig all'.
1da177e4
LT
369# Detect when mixed targets is specified, and make a second invocation
370# of make so .config is not included in this case either (for *config).
371
372no-dot-config-targets := clean mrproper distclean \
c30a02e0 373 cscope TAGS tags help %docs check% \
667918a4 374 include/linux/version.h headers_% \
c30a02e0 375 kernelrelease kernelversion
1da177e4
LT
376
377config-targets := 0
378mixed-targets := 0
379dot-config := 1
380
381ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
382 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
383 dot-config := 0
384 endif
385endif
386
387ifeq ($(KBUILD_EXTMOD),)
388 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
389 config-targets := 1
390 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
391 mixed-targets := 1
392 endif
393 endif
394endif
395
396ifeq ($(mixed-targets),1)
397# ===========================================================================
398# We're called with mixed targets (*config and build targets).
399# Handle them one by one.
400
401%:: FORCE
402 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
403
404else
405ifeq ($(config-targets),1)
406# ===========================================================================
407# *config targets only - make sure prerequisites are updated, and descend
408# in scripts/kconfig to make the *config target
409
410# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
411# KBUILD_DEFCONFIG may point out an alternative default configuration
412# used for 'make defconfig'
413include $(srctree)/arch/$(ARCH)/Makefile
414export KBUILD_DEFCONFIG
415
cd05e6bd 416config %config: scripts_basic outputmakefile FORCE
c955ccaf 417 $(Q)mkdir -p include/linux include/config
1da177e4
LT
418 $(Q)$(MAKE) $(build)=scripts/kconfig $@
419
420else
421# ===========================================================================
422# Build targets only - this includes vmlinux, arch specific targets, clean
423# targets and others. In general all targets except *config targets.
424
425ifeq ($(KBUILD_EXTMOD),)
426# Additional helpers built in scripts/
427# Carefully list dependencies so we do not try to build scripts twice
070b98bf 428# in parallel
4f193362 429PHONY += scripts
2e3646e5 430scripts: scripts_basic include/config/auto.conf
1da177e4
LT
431 $(Q)$(MAKE) $(build)=$(@)
432
1da177e4
LT
433# Objects we will link into vmlinux / subdirs we need to visit
434init-y := init/
435drivers-y := drivers/ sound/
436net-y := net/
437libs-y := lib/
438core-y := usr/
439endif # KBUILD_EXTMOD
440
441ifeq ($(dot-config),1)
9ee4e336
SR
442# Read in config
443-include include/config/auto.conf
1da177e4 444
9ee4e336 445ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
446# Read in dependencies to all Kconfig* files, make sure to run
447# oldconfig if changes are detected.
c955ccaf 448-include include/config/auto.conf.cmd
1da177e4 449
1da177e4 450# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 451$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 452
c955ccaf 453# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 454# with it and forgot to run make oldconfig.
070b98bf 455# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 456# we execute the config step to be sure to catch updated Kconfig files
14cdd3c4 457include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 458 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 459else
9ee4e336
SR
460# external modules needs include/linux/autoconf.h and include/config/auto.conf
461# but do not care if they are up-to-date. Use auto.conf to trigger the test
462PHONY += include/config/auto.conf
463
464include/config/auto.conf:
465 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
466 echo; \
467 echo " ERROR: Kernel configuration is invalid."; \
468 echo " include/linux/autoconf.h or $@ are missing."; \
469 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
470 echo; \
471 /bin/false)
472
473endif # KBUILD_EXTMOD
c955ccaf 474
1da177e4
LT
475else
476# Dummy target needed, because used as prerequisite
c955ccaf 477include/config/auto.conf: ;
9ee4e336 478endif # $(dot-config)
1da177e4
LT
479
480# The all: target is the default when no target is given on the
481# command line.
482# This allow a user to issue only 'make' to build a kernel including modules
070b98bf 483# Defaults vmlinux but it is usually overridden in the arch makefile
1da177e4
LT
484all: vmlinux
485
486ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
487CFLAGS += -Os
488else
489CFLAGS += -O2
490endif
491
c9eca0b9
SR
492include $(srctree)/arch/$(ARCH)/Makefile
493
1da177e4 494ifdef CONFIG_FRAME_POINTER
0030cbf0 495CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
1da177e4
LT
496else
497CFLAGS += -fomit-frame-pointer
498endif
499
604bf5a2
JB
500ifdef CONFIG_UNWIND_INFO
501CFLAGS += -fasynchronous-unwind-tables
690a973f 502LDFLAGS_vmlinux += --eh-frame-hdr
604bf5a2
JB
503endif
504
1da177e4
LT
505ifdef CONFIG_DEBUG_INFO
506CFLAGS += -g
507endif
508
c9eca0b9
SR
509# Force gcc to behave correct even for buggy distributions
510CFLAGS += $(call cc-option, -fno-stack-protector)
1da177e4 511
e8e69931 512# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 513NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
514CHECKFLAGS += $(NOSTDINC_FLAGS)
515
1da177e4
LT
516# warn about C99 declaration after statement
517CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
518
070b98bf 519# disable pointer signed / unsigned warnings in gcc 4.0
1da177e4
LT
520CFLAGS += $(call cc-option,-Wno-pointer-sign,)
521
522# Default kernel image to build when no specific target is given.
070b98bf 523# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
524# set in the environment
525# Also any assignments in arch/$(ARCH)/Makefile take precedence over
526# this default value
527export KBUILD_IMAGE ?= vmlinux
528
529#
530# INSTALL_PATH specifies where to place the updated kernel and system map
531# images. Default is /boot, but you can set it to other values
532export INSTALL_PATH ?= /boot
533
534#
535# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
536# relocations required by build roots. This is not defined in the
070b98bf 537# makefile but the argument can be passed to make if needed.
1da177e4
LT
538#
539
df9df036 540MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
541export MODLIB
542
ac031f26
TT
543#
544# INSTALL_MOD_STRIP, if defined, will cause modules to be
545# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
546# the default option --strip-debug will be used. Otherwise,
547# INSTALL_MOD_STRIP will used as the options to the strip command.
548
549ifdef INSTALL_MOD_STRIP
550ifeq ($(INSTALL_MOD_STRIP),1)
e340221a 551mod_strip_cmd = $(STRIP) --strip-debug
ac031f26
TT
552else
553mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
554endif # INSTALL_MOD_STRIP=1
555else
556mod_strip_cmd = true
557endif # INSTALL_MOD_STRIP
558export mod_strip_cmd
559
1da177e4
LT
560
561ifeq ($(KBUILD_EXTMOD),)
3a65dfe8 562core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
563
564vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
565 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
566 $(net-y) $(net-m) $(libs-y) $(libs-m)))
567
568vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
569 $(init-n) $(init-) \
570 $(core-n) $(core-) $(drivers-n) $(drivers-) \
571 $(net-n) $(net-) $(libs-n) $(libs-))))
572
573init-y := $(patsubst %/, %/built-in.o, $(init-y))
574core-y := $(patsubst %/, %/built-in.o, $(core-y))
575drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
576net-y := $(patsubst %/, %/built-in.o, $(net-y))
577libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
578libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
579libs-y := $(libs-y1) $(libs-y2)
580
581# Build vmlinux
582# ---------------------------------------------------------------------------
070b98bf 583# vmlinux is built from the objects selected by $(vmlinux-init) and
1da177e4
LT
584# $(vmlinux-main). Most are built-in.o files from top-level directories
585# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
586# Ordering when linking is important, and $(vmlinux-init) must be first.
587#
588# vmlinux
589# ^
590# |
591# +-< $(vmlinux-init)
592# | +--< init/version.o + more
593# |
594# +--< $(vmlinux-main)
595# | +--< driver/built-in.o mm/built-in.o + more
596# |
597# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
598#
599# vmlinux 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 vmlinux.
602# Therefore this step is delayed until just before final link of vmlinux -
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
608vmlinux-init := $(head-y) $(init-y)
609vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
610vmlinux-all := $(vmlinux-init) $(vmlinux-main)
611vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
612
613# Rule to link vmlinux - also used during CONFIG_KALLSYMS
614# May be overridden by arch/$(ARCH)/Makefile
615quiet_cmd_vmlinux__ ?= LD $@
616 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
617 -T $(vmlinux-lds) $(vmlinux-init) \
618 --start-group $(vmlinux-main) --end-group \
619 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
620
621# Generate new vmlinux version
622quiet_cmd_vmlinux_version = GEN .version
623 cmd_vmlinux_version = set -e; \
4e25d8bb
JB
624 if [ ! -r .version ]; then \
625 rm -f .version; \
626 echo 1 >.version; \
627 else \
628 mv .version .old_version; \
629 expr 0$$(cat .old_version) + 1 >.version; \
630 fi; \
1da177e4
LT
631 $(MAKE) $(build)=init
632
633# Generate System.map
070b98bf 634quiet_cmd_sysmap = SYSMAP
1da177e4
LT
635 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
636
637# Link of vmlinux
638# If CONFIG_KALLSYMS is set .version is already updated
639# Generate System.map and verify that the content is consistent
39ca371c
MR
640# Use + in front of the vmlinux_version rule to silent warning with make -j2
641# First command is ':' to allow us to use + in front of the rule
1da177e4 642define rule_vmlinux__
39ca371c 643 :
1da177e4
LT
644 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
645
646 $(call cmd,vmlinux__)
647 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
648
4635281c
SR
649 $(Q)$(if $($(quiet)cmd_sysmap), \
650 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
651 $(cmd_sysmap) $@ System.map; \
652 if [ $$? -ne 0 ]; then \
653 rm -f $@; \
654 /bin/false; \
1da177e4
LT
655 fi;
656 $(verify_kallsyms)
657endef
658
659
660ifdef CONFIG_KALLSYMS
661# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
662# It's a three stage process:
663# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
664# empty
665# Running kallsyms on that gives us .tmp_kallsyms1.o with
666# the right size - vmlinux version (uname -v) is updated during this step
667# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
668# but due to the added section, some addresses have shifted.
669# From here, we generate a correct .tmp_kallsyms2.o
670# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
671# o Verify that the System.map from vmlinux matches the map from
672# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
673# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
674# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
675# temporary bypass to allow the kernel to be built while the
676# maintainers work out what went wrong with kallsyms.
677
678ifdef CONFIG_KALLSYMS_EXTRA_PASS
679last_kallsyms := 3
680else
681last_kallsyms := 2
682endif
683
684kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
685
686define verify_kallsyms
4635281c
SR
687 $(Q)$(if $($(quiet)cmd_sysmap), \
688 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
1da177e4 689 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
4635281c
SR
690 $(Q)cmp -s System.map .tmp_System.map || \
691 (echo Inconsistent kallsyms data; \
692 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
1da177e4
LT
693 rm .tmp_kallsyms* ; /bin/false )
694endef
695
696# Update vmlinux version before link
697# Use + in front of this rule to silent warning about make -j1
72ba47c1 698# First command is ':' to allow us to use + in front of this rule
1da177e4
LT
699cmd_ksym_ld = $(cmd_vmlinux__)
700define rule_ksym_ld
72ba47c1 701 :
1da177e4
LT
702 +$(call cmd,vmlinux_version)
703 $(call cmd,vmlinux__)
704 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
705endef
706
707# Generate .S file with all kernel symbols
708quiet_cmd_kallsyms = KSYM $@
709 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
710 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
711
712.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
713 $(call if_changed_dep,as_o_S)
714
715.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
716 $(call cmd,kallsyms)
717
718# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
719.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
720 $(call if_changed_rule,ksym_ld)
721
722.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
723 $(call if_changed,vmlinux__)
724
725.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
726 $(call if_changed,vmlinux__)
727
728# Needs to visit scripts/ before $(KALLSYMS) can be used.
729$(KALLSYMS): scripts ;
730
33bc25ea
SR
731# Generate some data for debugging strange kallsyms problems
732debug_kallsyms: .tmp_map$(last_kallsyms)
733
734.tmp_map%: .tmp_vmlinux% FORCE
735 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
736
737.tmp_map3: .tmp_map2
738
739.tmp_map2: .tmp_map1
740
1da177e4
LT
741endif # ifdef CONFIG_KALLSYMS
742
743# vmlinux image - including updated kernel symbols
744vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
0f836e5f 745ifdef CONFIG_HEADERS_CHECK
0e7af8d0 746 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
0f836e5f 747endif
1da177e4 748 $(call if_changed_rule,vmlinux__)
12715d20 749 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
4e25d8bb 750 $(Q)rm -f .old_version
1da177e4
LT
751
752# The actual objects are generated when descending,
753# make sure no implicit rule kicks in
754$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
755
756# Handle descending into subdirectories listed in $(vmlinux-dirs)
757# Preset locale variables to speed up the build process. Limit locale
758# tweaks to this spot to avoid wrong language settings when running
759# make menuconfig etc.
760# Error messages still appears in the original language
761
4f193362 762PHONY += $(vmlinux-dirs)
5bb78269 763$(vmlinux-dirs): prepare scripts
1da177e4
LT
764 $(Q)$(MAKE) $(build)=$@
765
cb58455c 766# Build the kernel release string
cb58455c 767#
1ef98856
RD
768# The KERNELRELEASE value built here is stored in the file
769# include/config/kernel.release, and is used when executing several
770# make targets, such as "make install" or "make modules_install."
771#
772# The eventual kernel release string consists of the following fields,
773# shown in a hierarchical format to show how smaller parts are concatenated
774# to form the larger and final value, with values coming from places like
775# the Makefile, kernel config options, make command line options and/or
776# SCM tag information.
777#
778# $(KERNELVERSION)
779# $(VERSION) eg, 2
780# $(PATCHLEVEL) eg, 6
781# $(SUBLEVEL) eg, 18
782# $(EXTRAVERSION) eg, -rc6
783# $(localver-full)
784# $(localver)
785# localversion* (all localversion* files)
786# $(CONFIG_LOCALVERSION) (from kernel config setting)
787# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
788# ./scripts/setlocalversion (SCM tag, if one exists)
789# $(LOCALVERSION) (from make command line if provided)
790#
791# Note how the final $(localver-auto) string is included *only* if the
792# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
793# moment, only git is supported but other SCMs can edit the script
794# scripts/setlocalversion and add the appropriate checks as needed.
cb58455c
SR
795
796nullstring :=
797space := $(nullstring) # end of line
798
799___localver = $(objtree)/localversion* $(srctree)/localversion*
800__localver = $(sort $(wildcard $(___localver)))
801# skip backup files (containing '~')
802_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
803
804localver = $(subst $(space),, \
805 $(shell cat /dev/null $(_localver)) \
806 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
070b98bf 807
cb58455c
SR
808# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
809# and if the SCM is know a tag from the SCM is appended.
070b98bf 810# The appended tag is determined by the SCM used.
cb58455c
SR
811#
812# Currently, only git is supported.
813# Other SCMs can edit scripts/setlocalversion and add the appropriate
814# checks as needed.
815ifdef CONFIG_LOCALVERSION_AUTO
816 _localver-auto = $(shell $(CONFIG_SHELL) \
817 $(srctree)/scripts/setlocalversion $(srctree))
818 localver-auto = $(LOCALVERSION)$(_localver-auto)
819endif
820
821localver-full = $(localver)$(localver-auto)
822
f1d28fb0 823# Store (new) KERNELRELASE string in include/config/kernel.release
2244cbd8 824kernelrelease = $(KERNELVERSION)$(localver-full)
f1d28fb0 825include/config/kernel.release: include/config/auto.conf FORCE
2244cbd8
SR
826 $(Q)rm -f $@
827 $(Q)echo $(kernelrelease) > $@
cb58455c
SR
828
829
1da177e4 830# Things we need to do before we recursively start building the kernel
5bb78269
SR
831# or the modules are listed in "prepare".
832# A multi level approach is used. prepareN is processed before prepareN-1.
833# archprepare is used in arch Makefiles and when processed asm symlink,
834# version.h and scripts_basic is processed / created.
1da177e4 835
5bb78269 836# Listed in dependency order
4f193362 837PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269
SR
838
839# prepare-all is deprecated, use prepare as valid replacement
4f193362 840PHONY += prepare-all
1da177e4 841
86feeaa8 842# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
843# and if so do:
844# 1) Check that make has not been executed in the kernel src $(srctree)
845# 2) Create the include2 directory, used for the second asm symlink
f1d28fb0 846prepare3: include/config/kernel.release
1da177e4
LT
847ifneq ($(KBUILD_SRC),)
848 @echo ' Using $(srctree) as source for kernel'
c955ccaf 849 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1da177e4
LT
850 echo " $(srctree) is not clean, please run 'make mrproper'";\
851 echo " in the '$(srctree)' directory.";\
852 /bin/false; \
853 fi;
854 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
855 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
856endif
857
86feeaa8
SR
858# prepare2 creates a makefile if using a separate output directory
859prepare2: prepare3 outputmakefile
1da177e4 860
63104eec
SR
861prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
862 include/asm include/config/auto.conf
1da177e4 863ifneq ($(KBUILD_MODULES),)
1da177e4 864 $(Q)mkdir -p $(MODVERDIR)
fca1dff2 865 $(Q)rm -f $(MODVERDIR)/*
1da177e4
LT
866endif
867
5bb78269
SR
868archprepare: prepare1 scripts_basic
869
870prepare0: archprepare FORCE
8d36a623 871 $(Q)$(MAKE) $(build)=.
86feeaa8 872
1da177e4 873# All the preparing..
5bb78269 874prepare prepare-all: prepare0
1da177e4 875
070b98bf
SR
876# Leave this as default for preprocessing vmlinux.lds.S, which is now
877# done in arch/$(ARCH)/kernel/Makefile
1da177e4
LT
878
879export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
880
070b98bf
SR
881# FIXME: The asm symlink changes when $(ARCH) changes. That's
882# hard to detect, but I suppose "make mrproper" is a good idea
883# before switching between archs anyway.
1da177e4
LT
884
885include/asm:
886 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
887 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
888 @ln -fsn asm-$(ARCH) $@
889
1da177e4
LT
890# Generate some files
891# ---------------------------------------------------------------------------
892
893# KERNELRELEASE can change from a few different places, meaning version.h
894# needs to be updated, so this check is forced on all builds
895
896uts_len := 64
63104eec
SR
897define filechk_utsrelease.h
898 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
899 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
900 exit 1; \
901 fi; \
902 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
903endef
1da177e4
LT
904
905define filechk_version.h
63104eec
SR
906 (echo \#define LINUX_VERSION_CODE $(shell \
907 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
908 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
909endef
910
63104eec 911include/linux/version.h: $(srctree)/Makefile FORCE
1da177e4
LT
912 $(call filechk,version.h)
913
63104eec
SR
914include/linux/utsrelease.h: include/config/kernel.release FORCE
915 $(call filechk,utsrelease.h)
916
1da177e4
LT
917# ---------------------------------------------------------------------------
918
4f193362 919PHONY += depend dep
1da177e4
LT
920depend dep:
921 @echo '*** Warning: make $@ is unnecessary now.'
922
8d730cfb
DW
923# ---------------------------------------------------------------------------
924# Kernel headers
1ab7a1f3 925INSTALL_HDR_PATH=$(objtree)/usr
8d730cfb
DW
926export INSTALL_HDR_PATH
927
6d716275
DW
928HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
929
930PHONY += headers_install_all
398477d4
LT
931headers_install_all: include/linux/version.h scripts_basic FORCE
932 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
6d716275 933 $(Q)for arch in $(HDRARCHES); do \
398477d4 934 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
6d716275
DW
935 done
936
8d730cfb 937PHONY += headers_install
07aea3a7 938headers_install: include/linux/version.h scripts_basic FORCE
0e7af8d0 939 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
f17b7bad
DW
940 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
941 exit 1 ; fi
07aea3a7 942 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
b805aa0e 943 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
8d730cfb 944
68475359
DW
945PHONY += headers_check
946headers_check: headers_install
b805aa0e 947 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
68475359 948
1da177e4
LT
949# ---------------------------------------------------------------------------
950# Modules
951
952ifdef CONFIG_MODULES
953
070b98bf 954# By default, build modules as well
1da177e4
LT
955
956all: modules
957
958# Build modules
959
4f193362 960PHONY += modules
1da177e4
LT
961modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
962 @echo ' Building modules, stage 2.';
b805aa0e 963 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4
LT
964
965
966# Target to prepare building external modules
4f193362 967PHONY += modules_prepare
5bb78269 968modules_prepare: prepare scripts
1da177e4
LT
969
970# Target to install modules
4f193362 971PHONY += modules_install
1da177e4
LT
972modules_install: _modinst_ _modinst_post
973
4f193362 974PHONY += _modinst_
1da177e4 975_modinst_:
ce454d4d 976 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1da177e4
LT
977 echo "Warning: you may need to install module-init-tools"; \
978 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
979 sleep 1; \
980 fi
981 @rm -rf $(MODLIB)/kernel
982 @rm -f $(MODLIB)/source
983 @mkdir -p $(MODLIB)/kernel
984 @ln -s $(srctree) $(MODLIB)/source
985 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
986 rm -f $(MODLIB)/build ; \
987 ln -s $(objtree) $(MODLIB)/build ; \
988 fi
b805aa0e 989 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4
LT
990
991# If System.map exists, run depmod. This deliberately does not have a
992# dependency on System.map since that would run the dependency tree on
993# vmlinux. This depmod is only for convenience to give the initial
994# boot a modules.dep even before / is mounted read-write. However the
995# boot script depmod is the master version.
996ifeq "$(strip $(INSTALL_MOD_PATH))" ""
997depmod_opts :=
998else
999depmod_opts := -b $(INSTALL_MOD_PATH) -r
1000endif
4f193362 1001PHONY += _modinst_post
1da177e4
LT
1002_modinst_post: _modinst_
1003 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1004
1005else # CONFIG_MODULES
1006
1007# Modules not configured
1008# ---------------------------------------------------------------------------
1009
1010modules modules_install: FORCE
1011 @echo
1012 @echo "The present kernel configuration has modules disabled."
1013 @echo "Type 'make config' and enable loadable module support."
1014 @echo "Then build a kernel with module support enabled."
1015 @echo
1016 @exit 1
1017
1018endif # CONFIG_MODULES
1019
1da177e4
LT
1020###
1021# Cleaning is done on three levels.
1022# make clean Delete most generated files
1023# Leave enough to build external modules
1024# make mrproper Delete the current configuration, and all generated files
1025# make distclean Remove editor backup files, patch leftover files and the like
1026
1027# Directories & files removed with 'make clean'
1028CLEAN_DIRS += $(MODVERDIR)
1029CLEAN_FILES += vmlinux System.map \
1030 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1031
1032# Directories & files removed with 'make mrproper'
1ab7a1f3 1033MRPROPER_DIRS += include/config include2 usr/include
50aa88e2 1034MRPROPER_FILES += .config .config.old include/asm .version .old_version \
63104eec
SR
1035 include/linux/autoconf.h include/linux/version.h \
1036 include/linux/utsrelease.h \
f1d28fb0 1037 Module.symvers tags TAGS cscope*
1da177e4
LT
1038
1039# clean - Delete most, but leave enough to build external modules
1040#
1041clean: rm-dirs := $(CLEAN_DIRS)
1042clean: rm-files := $(CLEAN_FILES)
86feeaa8 1043clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1da177e4 1044
4f193362 1045PHONY += $(clean-dirs) clean archclean
1da177e4
LT
1046$(clean-dirs):
1047 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1048
1049clean: archclean $(clean-dirs)
1050 $(call cmd,rmdirs)
1051 $(call cmd,rmfiles)
1052 @find . $(RCS_FIND_IGNORE) \
070b98bf 1053 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
15fde675
AG
1054 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1055 -o -name '*.symtypes' \) \
1da177e4
LT
1056 -type f -print | xargs rm -f
1057
1058# mrproper - Delete all generated files, including .config
1059#
1060mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1061mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1062mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1063
4f193362 1064PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1065$(mrproper-dirs):
1066 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1067
1068mrproper: clean archmrproper $(mrproper-dirs)
1069 $(call cmd,rmdirs)
1070 $(call cmd,rmfiles)
1071
1072# distclean
1073#
4f193362 1074PHONY += distclean
1da177e4
LT
1075
1076distclean: mrproper
1077 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1078 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1079 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
070b98bf 1080 -o -name '.*.rej' -o -size 0 \
1da177e4
LT
1081 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1082 -type f -print | xargs rm -f
1083
1084
1085# Packaging of the kernel to various formats
1086# ---------------------------------------------------------------------------
1087# rpm target kept for backward compatibility
1088package-dir := $(srctree)/scripts/package
1089
031ecc6d 1090%pkg: include/config/kernel.release FORCE
6c2133e1 1091 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1092rpm: include/config/kernel.release FORCE
6c2133e1 1093 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1094
1095
1096# Brief documentation of the typical targets used
1097# ---------------------------------------------------------------------------
1098
1099boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1100boards := $(notdir $(boards))
1101
1102help:
1103 @echo 'Cleaning targets:'
5cc8d246
JJ
1104 @echo ' clean - remove most generated files but keep the config and'
1105 @echo ' enough build support to build external modules'
1da177e4 1106 @echo ' mrproper - remove all generated files + config + various backup files'
5cc8d246 1107 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1108 @echo ''
1109 @echo 'Configuration targets:'
1110 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1111 @echo ''
1112 @echo 'Other generic targets:'
1113 @echo ' all - Build all targets marked with [*]'
1114 @echo '* vmlinux - Build the bare kernel'
1115 @echo '* modules - Build all modules'
9cc5d74c 1116 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1da177e4
LT
1117 @echo ' dir/ - Build all files in dir and below'
1118 @echo ' dir/file.[ois] - Build specified target only'
155ad605 1119 @echo ' dir/file.ko - Build module including final link'
1da177e4
LT
1120 @echo ' rpm - Build a kernel as an RPM package'
1121 @echo ' tags/TAGS - Generate tags file for editors'
1122 @echo ' cscope - Generate cscope index'
6d128842 1123 @echo ' kernelrelease - Output the release version string'
cb58455c 1124 @echo ' kernelversion - Output the version stored in Makefile'
f17b7bad
DW
1125 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1126 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1127 fi
1ab7a1f3 1128 @echo ' (default: $(INSTALL_HDR_PATH))'
1da177e4
LT
1129 @echo ''
1130 @echo 'Static analysers'
1da177e4
LT
1131 @echo ' checkstack - Generate a list of stack hogs'
1132 @echo ' namespacecheck - Name space analysis on compiled kernel'
f17b7bad
DW
1133 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1134 echo ' headers_check - Sanity check on exported headers'; \
1135 fi
1da177e4
LT
1136 @echo ''
1137 @echo 'Kernel packaging:'
6c2133e1 1138 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1139 @echo ''
1140 @echo 'Documentation targets:'
1141 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1142 @echo ''
1143 @echo 'Architecture specific targets ($(ARCH)):'
1144 @$(if $(archhelp),$(archhelp),\
1145 echo ' No architecture specific help defined for $(ARCH)')
1146 @echo ''
1147 @$(if $(boards), \
1148 $(foreach b, $(boards), \
1149 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1150 echo '')
1151
1152 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1153 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1154 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1155 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1156 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1da177e4
LT
1157 @echo ''
1158 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1159 @echo 'For further info see the ./README file'
1160
1161
1162# Documentation targets
1163# ---------------------------------------------------------------------------
1164%docs: scripts_basic FORCE
1165 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1166
1167else # KBUILD_EXTMOD
1168
1169###
1170# External module support.
1171# When building external modules the kernel used as basis is considered
1172# read-only, and no consistency checks are made and the make
1173# system is not used on the basis kernel. If updates are required
1174# in the basis kernel ordinary make commands (without M=...) must
1175# be used.
1176#
1177# The following are the only valid targets when building external
1178# modules.
1179# make M=dir clean Delete all automatically generated files
1180# make M=dir modules Make all modules in specified dir
1181# make M=dir Same as 'make M=dir modules'
1182# make M=dir modules_install
070b98bf 1183# Install the modules built in the module directory
1da177e4
LT
1184# Assumes install directory is already created
1185
1186# We are always building modules
1187KBUILD_MODULES := 1
4f193362 1188PHONY += crmodverdir
1da177e4
LT
1189crmodverdir:
1190 $(Q)mkdir -p $(MODVERDIR)
fca1dff2 1191 $(Q)rm -f $(MODVERDIR)/*
1da177e4 1192
4f193362 1193PHONY += $(objtree)/Module.symvers
1da177e4
LT
1194$(objtree)/Module.symvers:
1195 @test -e $(objtree)/Module.symvers || ( \
1196 echo; \
1197 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1198 echo " is missing; modules will have no dependencies and modversions."; \
1199 echo )
1200
1201module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1202PHONY += $(module-dirs) modules
1da177e4
LT
1203$(module-dirs): crmodverdir $(objtree)/Module.symvers
1204 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1205
1206modules: $(module-dirs)
1207 @echo ' Building modules, stage 2.';
b805aa0e 1208 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1209
4f193362 1210PHONY += modules_install
a67dc21a 1211modules_install: _emodinst_ _emodinst_post
e6304663 1212
4f193362
PS
1213install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1214PHONY += _emodinst_
a67dc21a 1215_emodinst_:
a67dc21a 1216 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1217 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1218
a67dc21a
SR
1219# Run depmod only is we have System.map and depmod is executable
1220quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1221 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1222 $(DEPMOD) -ae -F System.map \
1223 $(if $(strip $(INSTALL_MOD_PATH)), \
1224 -b $(INSTALL_MOD_PATH) -r) \
1225 $(KERNELRELEASE); \
1226 fi
1227
4f193362 1228PHONY += _emodinst_post
a67dc21a
SR
1229_emodinst_post: _emodinst_
1230 $(call cmd,depmod)
1231
1da177e4
LT
1232clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1233
4f193362 1234PHONY += $(clean-dirs) clean
1da177e4
LT
1235$(clean-dirs):
1236 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1237
1238clean: rm-dirs := $(MODVERDIR)
1239clean: $(clean-dirs)
1240 $(call cmd,rmdirs)
1241 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
070b98bf 1242 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1da177e4
LT
1243 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1244 -type f -print | xargs rm -f
1245
1246help:
1247 @echo ' Building external modules.'
1248 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1249 @echo ''
1250 @echo ' modules - default target, build the module(s)'
1251 @echo ' modules_install - install the module'
1252 @echo ' clean - remove generated files in module directory only'
1253 @echo ''
06300b21
SR
1254
1255# Dummies...
4f193362 1256PHONY += prepare scripts
06300b21
SR
1257prepare: ;
1258scripts: ;
1da177e4
LT
1259endif # KBUILD_EXTMOD
1260
1261# Generate tags for editors
1262# ---------------------------------------------------------------------------
1263
1264#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1265#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1266#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1267
f182ae62 1268ifeq ($(src),$(obj))
1da177e4
LT
1269__srctree =
1270else
1271__srctree = $(srctree)/
1272endif
1273
2ab23c95
PBG
1274ifeq ($(ALLSOURCE_ARCHS),)
1275ifeq ($(ARCH),um)
1276ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1277else
1278ALLINCLUDE_ARCHS := $(ARCH)
1279endif
1280else
070b98bf 1281#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
2ab23c95
PBG
1282ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1283endif
1284
a0674e88
IC
1285ALLSOURCE_ARCHS := $(ARCH)
1286
e838db68
MY
1287define find-sources
1288 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1da177e4 1289 \( -name include -o -name arch \) -prune -o \
e838db68 1290 -name $1 -print; \
a0674e88
IC
1291 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1292 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
e838db68 1293 -name $1 -print; \
a0674e88 1294 done ; \
1da177e4 1295 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
e838db68 1296 -name $1 -print; \
1da177e4
LT
1297 find $(__srctree)include $(RCS_FIND_IGNORE) \
1298 \( -name config -o -name 'asm-*' \) -prune \
e838db68 1299 -o -name $1 -print; \
2ab23c95 1300 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
a0674e88 1301 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
e838db68 1302 -name $1 -print; \
a0674e88 1303 done ; \
1da177e4 1304 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
e838db68
MY
1305 -name $1 -print )
1306endef
1307
1308define all-sources
1309 $(call find-sources,'*.[chS]')
1310endef
1311define all-kconfigs
1312 $(call find-sources,'Kconfig*')
1313endef
1314define all-defconfigs
1315 $(call find-sources,'defconfig')
1da177e4
LT
1316endef
1317
da7c0408
AG
1318define xtags
1319 if $1 --version 2>&1 | grep -iq exuberant; then \
1320 $(all-sources) | xargs $1 -a \
1321 -I __initdata,__exitdata,__acquires,__releases \
1322 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
91b943ee
AK
1323 --extra=+f --c-kinds=+px \
1324 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
da7c0408
AG
1325 $(all-kconfigs) | xargs $1 -a \
1326 --langdef=kconfig \
1327 --language-force=kconfig \
1328 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
18e39913 1329 $(all-defconfigs) | xargs -r $1 -a \
da7c0408
AG
1330 --langdef=dotconfig \
1331 --language-force=dotconfig \
1332 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1333 elif $1 --version 2>&1 | grep -iq emacs; then \
1334 $(all-sources) | xargs $1 -a; \
1335 $(all-kconfigs) | xargs $1 -a \
1336 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
18e39913 1337 $(all-defconfigs) | xargs -r $1 -a \
da7c0408
AG
1338 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1339 else \
1340 $(all-sources) | xargs $1 -a; \
1341 fi
1342endef
1343
1da177e4 1344quiet_cmd_cscope-file = FILELST cscope.files
acbef459 1345 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1da177e4
LT
1346
1347quiet_cmd_cscope = MAKE cscope.out
acbef459 1348 cmd_cscope = cscope -b
1da177e4
LT
1349
1350cscope: FORCE
1351 $(call cmd,cscope-file)
1352 $(call cmd,cscope)
1353
1354quiet_cmd_TAGS = MAKE $@
66d609ec
SR
1355define cmd_TAGS
1356 rm -f $@; \
da7c0408 1357 $(call xtags,etags)
66d609ec
SR
1358endef
1359
1360TAGS: FORCE
1361 $(call cmd,TAGS)
1da177e4 1362
1da177e4
LT
1363quiet_cmd_tags = MAKE $@
1364define cmd_tags
1365 rm -f $@; \
da7c0408 1366 $(call xtags,ctags)
1da177e4
LT
1367endef
1368
1da177e4
LT
1369tags: FORCE
1370 $(call cmd,tags)
1371
1372
1373# Scripts to check various things for consistency
1374# ---------------------------------------------------------------------------
1375
1da177e4
LT
1376includecheck:
1377 find * $(RCS_FIND_IGNORE) \
1378 -name '*.[hcS]' -type f -print | sort \
1379 | xargs $(PERL) -w scripts/checkincludes.pl
1380
1381versioncheck:
1382 find * $(RCS_FIND_IGNORE) \
1383 -name '*.[hcS]' -type f -print | sort \
1384 | xargs $(PERL) -w scripts/checkversion.pl
1385
1da177e4
LT
1386namespacecheck:
1387 $(PERL) $(srctree)/scripts/namespace.pl
1388
1389endif #ifeq ($(config-targets),1)
1390endif #ifeq ($(mixed-targets),1)
1391
c30a02e0 1392PHONY += checkstack kernelrelease kernelversion
e3ccf6e3
JD
1393
1394# Use $(SUBARCH) here instead of $(ARCH) so that this works for UML.
1395# In the UML case, $(SUBARCH) is the name of the underlying
1396# architecture, while for all other arches, it is the same as $(ARCH).
1da177e4
LT
1397checkstack:
1398 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
e3ccf6e3 1399 $(PERL) $(src)/scripts/checkstack.pl $(SUBARCH)
1da177e4
LT
1400
1401kernelrelease:
f1d28fb0
RZ
1402 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1403 $(error kernelrelease not valid - run 'make prepare' to update it))
cb58455c 1404kernelversion:
2244cbd8 1405 @echo $(KERNELVERSION)
1da177e4 1406
06300b21
SR
1407# Single targets
1408# ---------------------------------------------------------------------------
bc2546a6
SR
1409# Single targets are compatible with:
1410# - build whith mixed source and output
1411# - build with separate output dir 'make O=...'
1412# - external modules
1413#
1414# target-dir => where to store outputfile
1415# build-dir => directory in kernel source tree to use
1416
1417ifeq ($(KBUILD_EXTMOD),)
aa360879 1418 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1419 target-dir = $(dir $@)
1420else
1421 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1422 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1423 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1424endif
1425
f6ecebd6 1426%.s: %.c prepare scripts FORCE
bc2546a6 1427 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1428%.i: %.c prepare scripts FORCE
bc2546a6 1429 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1430%.o: %.c prepare scripts FORCE
bc2546a6 1431 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1432%.lst: %.c prepare scripts FORCE
bc2546a6 1433 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1434%.s: %.S prepare scripts FORCE
bc2546a6 1435 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1436%.o: %.S prepare scripts FORCE
bc2546a6 1437 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1438%.symtypes: %.c prepare scripts FORCE
1439 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1440
bc2546a6
SR
1441# Modules
1442/ %/: prepare scripts FORCE
06300b21 1443 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1444 $(build)=$(build-dir)
1445%.ko: prepare scripts FORCE
06300b21 1446 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1447 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1448 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1449
1da177e4
LT
1450# FIXME Should go into a make.lib or something
1451# ===========================================================================
1452
1453quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1454 cmd_rmdirs = rm -rf $(rm-dirs)
1455
1456quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1457 cmd_rmfiles = rm -f $(rm-files)
1458
1459
1460a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1461 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
5e8d780d 1462 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1da177e4
LT
1463
1464quiet_cmd_as_o_S = AS $@
1465cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1466
1467# read all saved command lines
1468
1469targets := $(wildcard $(sort $(targets)))
1470cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1471
1472ifneq ($(cmd_files),)
1473 $(cmd_files): ; # Do not try to update included dependency files
1474 include $(cmd_files)
1475endif
1476
1da177e4
LT
1477# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1478# Usage:
1479# $(Q)$(MAKE) $(clean)=dir
1480clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1481
1da177e4
LT
1482endif # skip-makefile
1483
4f193362 1484PHONY += FORCE
1da177e4 1485FORCE:
4f193362
PS
1486
1487
1488# Declare the contents of the .PHONY variable as phony. We keep that
1489# information in a variable se we can use it in if_changed and friends.
1490.PHONY: $(PHONY)