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1da177e4
LT
1VERSION = 2
2PATCHLEVEL = 6
39403865 3SUBLEVEL = 22
7dcca30a 4EXTRAVERSION =
188e1f81 5NAME = Holy Dancing Manatees, Batman!
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
15964864
OV
13# Do not:
14# o use make's built-in rules and variables
15# (this increases performance and avoid hard-to-debug behavour);
16# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
1da177e4
LT
18
19# We are using a recursive build, so we need to do a little thinking
20# to get the ordering right.
21#
22# Most importantly: sub-Makefiles should only ever modify files in
23# their own directory. If in some directory we have a dependency on
24# a file in another dir (which doesn't happen often, but it's often
25# unavoidable when linking the built-in.o targets which finally
26# turn into vmlinux), we will call a sub make in that other dir, and
27# after that we are sure that everything which is in that other dir
28# is now up to date.
29#
30# The only cases where we need to modify files which have global
31# effects are thus separated out and done before the recursive
32# descending is started. They are now explicitly listed as the
33# prepare rule.
34
35# To put more focus on warnings, be less verbose as default
36# Use 'make V=1' to see the full commands
37
38ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42endif
43ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45endif
46
1c7bafe7
RD
47# Call a source code checker (by default, "sparse") as part of the
48# C compilation.
49#
50# Use 'make C=1' to enable checking of only re-compiled files.
51# Use 'make C=2' to enable checking of *all* source files, regardless
52# of whether they are re-compiled or not.
53#
54# See the file "Documentation/sparse.txt" for more details, including
55# where to get the "sparse" utility.
1da177e4
LT
56
57ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61endif
62ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64endif
65
66# Use make M=dir to specify directory of external module to build
67# Old syntax make ... SUBDIRS=$PWD is still supported
68# Setting the environment variable KBUILD_EXTMOD take precedence
69ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71endif
72ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76endif
77
78
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
070b98bf 84#
1da177e4
LT
85# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(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?
101ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
4f193362 108PHONY := _all
1da177e4
LT
109_all:
110
111ifneq ($(KBUILD_OUTPUT),)
112# Invoke a second make in the output directory, passing relevant variables
113# check that the output directory actually exists
114saved-output := $(KBUILD_OUTPUT)
115KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
116$(if $(KBUILD_OUTPUT),, \
117 $(error output directory "$(saved-output)" does not exist))
118
4f193362 119PHONY += $(MAKECMDGOALS)
1da177e4 120
36cbbe5e 121$(filter-out _all,$(MAKECMDGOALS)) _all:
23a45e2c
SR
122 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
123 KBUILD_SRC=$(CURDIR) \
36cbbe5e 124 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
1da177e4
LT
125
126# Leave processing to above invocation of make
127skip-makefile := 1
128endif # ifneq ($(KBUILD_OUTPUT),)
129endif # ifeq ($(KBUILD_SRC),)
130
131# We process the rest of the Makefile if this is the final invocation of make
132ifeq ($(skip-makefile),)
133
134# If building an external module we do not care about the all: rule
135# but instead _all depend on modules
4f193362 136PHONY += all
1da177e4
LT
137ifeq ($(KBUILD_EXTMOD),)
138_all: all
139else
140_all: modules
141endif
142
143srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
144TOPDIR := $(srctree)
145# FIXME - TOPDIR is obsolete, use srctree/objtree
146objtree := $(CURDIR)
147src := $(srctree)
148obj := $(objtree)
149
0f558c33 150VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1da177e4
LT
151
152export srctree objtree VPATH TOPDIR
153
1da177e4
LT
154
155# SUBARCH tells the usermode build what the underlying arch is. That is set
156# first, and if a usermode build is happening, the "ARCH=um" on the command
157# line overrides the setting of ARCH below. If a native build is happening,
158# then ARCH is assigned, getting whatever value it gets normally, and
159# SUBARCH is subsequently ignored.
160
161SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
162 -e s/arm.*/arm/ -e s/sa110/arm/ \
39990b5e 163 -e s/s390x/s390/ -e s/parisc64/parisc/ \
8999257c 164 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
1da177e4
LT
165
166# Cross compiling and selecting different set of gcc/bin-utils
167# ---------------------------------------------------------------------------
168#
169# When performing cross compilation for other architectures ARCH shall be set
170# to the target architecture. (See arch/* for the possibilities).
171# ARCH can be set during invocation of make:
172# make ARCH=ia64
173# Another way is to have ARCH set in the environment.
174# The default ARCH is the host where make is executed.
175
176# CROSS_COMPILE specify the prefix used for all executables used
177# during compilation. Only gcc and related bin-utils executables
178# are prefixed with $(CROSS_COMPILE).
179# CROSS_COMPILE can be set on the command line
180# make CROSS_COMPILE=ia64-linux-
181# Alternatively CROSS_COMPILE can be set in the environment.
182# Default value for CROSS_COMPILE is not to prefix executables
183# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
184
185ARCH ?= $(SUBARCH)
186CROSS_COMPILE ?=
187
188# Architecture as present in compile.h
189UTS_MACHINE := $(ARCH)
190
14cdd3c4
RZ
191KCONFIG_CONFIG ?= .config
192
1da177e4
LT
193# SHELL used by kbuild
194CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
195 else if [ -x /bin/bash ]; then echo /bin/bash; \
196 else echo sh; fi ; fi)
197
070b98bf
SR
198HOSTCC = gcc
199HOSTCXX = g++
200HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
201HOSTCXXFLAGS = -O2
1da177e4 202
070b98bf
SR
203# Decide whether to build built-in, modular, or both.
204# Normally, just do built-in.
1da177e4
LT
205
206KBUILD_MODULES :=
207KBUILD_BUILTIN := 1
208
209# If we have only "make modules", don't compile built-in objects.
210# When we're building modules with modversions, we need to consider
211# the built-in objects during the descend as well, in order to
070b98bf 212# make sure the checksums are up to date before we record them.
1da177e4
LT
213
214ifeq ($(MAKECMDGOALS),modules)
215 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
216endif
217
218# If we have "make <whatever> modules", compile modules
219# in addition to whatever we do anyway.
220# Just "make" or "make all" shall build modules as well
221
222ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
223 KBUILD_MODULES := 1
224endif
225
226ifeq ($(MAKECMDGOALS),)
227 KBUILD_MODULES := 1
228endif
229
e579d351 230export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
231export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
232
233# Beautify output
234# ---------------------------------------------------------------------------
235#
236# Normally, we echo the whole command before executing it. By making
237# that echo $($(quiet)$(cmd)), we now have the possibility to set
238# $(quiet) to choose other forms of output instead, e.g.
239#
240# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
241# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
242#
243# If $(quiet) is empty, the whole command will be printed.
244# If it is set to "quiet_", only the short version will be printed.
070b98bf 245# If it is set to "silent_", nothing will be printed at all, since
1da177e4
LT
246# the variable $(silent_cmd_cc_o_c) doesn't exist.
247#
a58a414f 248# A simple variant is to prefix commands with $(Q) - that's useful
1da177e4
LT
249# for commands that shall be hidden in non-verbose mode.
250#
251# $(Q)ln $@ :<
252#
253# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
254# If KBUILD_VERBOSE equals 1 then the above command is displayed.
255
256ifeq ($(KBUILD_VERBOSE),1)
257 quiet =
258 Q =
259else
260 quiet=quiet_
261 Q = @
262endif
263
264# If the user is running make -s (silent mode), suppress echoing of
265# commands
266
267ifneq ($(findstring s,$(MAKEFLAGS)),)
268 quiet=silent_
269endif
270
271export quiet Q KBUILD_VERBOSE
272
1da177e4
LT
273
274# Look for make include files relative to root of kernel src
275MAKEFLAGS += --include-dir=$(srctree)
276
15964864
OV
277# We need some generic definitions.
278include $(srctree)/scripts/Kbuild.include
1da177e4
LT
279
280# Make variables (CC, etc...)
281
282AS = $(CROSS_COMPILE)as
283LD = $(CROSS_COMPILE)ld
284CC = $(CROSS_COMPILE)gcc
285CPP = $(CC) -E
286AR = $(CROSS_COMPILE)ar
287NM = $(CROSS_COMPILE)nm
288STRIP = $(CROSS_COMPILE)strip
289OBJCOPY = $(CROSS_COMPILE)objcopy
290OBJDUMP = $(CROSS_COMPILE)objdump
291AWK = awk
292GENKSYMS = scripts/genksyms/genksyms
293DEPMOD = /sbin/depmod
294KALLSYMS = scripts/kallsyms
295PERL = perl
296CHECK = sparse
297
af4ca457 298CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
1da177e4
LT
299MODFLAGS = -DMODULE
300CFLAGS_MODULE = $(MODFLAGS)
301AFLAGS_MODULE = $(MODFLAGS)
302LDFLAGS_MODULE = -r
303CFLAGS_KERNEL =
304AFLAGS_KERNEL =
305
306
307# Use LINUXINCLUDE when you must reference the include/ directory.
308# Needed to be compatible with the O= option
309LINUXINCLUDE := -Iinclude \
2dd34b48 310 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
e623a3b8 311 -include include/linux/autoconf.h
1da177e4
LT
312
313CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
314
070b98bf
SR
315CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
316 -fno-strict-aliasing -fno-common
317AFLAGS := -D__ASSEMBLY__
1da177e4 318
f1d28fb0
RZ
319# Read KERNELRELEASE from include/config/kernel.release (if it exists)
320KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
2244cbd8 321KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
cb58455c 322
070b98bf
SR
323export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
324export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
325export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
326export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4
LT
327
328export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
070b98bf 329export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
1da177e4
LT
330export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
331
332# When compiling out-of-tree modules, put MODVERDIR in the module
333# tree rather than in the kernel tree. The kernel tree might
334# even be read-only.
335export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
336
1da177e4
LT
337# Files to ignore in find ... statements
338
406119f4
TM
339RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
340export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
341
342# ===========================================================================
343# Rules shared between *config targets and build targets
344
345# Basic helpers built in scripts/
4f193362 346PHONY += scripts_basic
1da177e4
LT
347scripts_basic:
348 $(Q)$(MAKE) $(build)=scripts/basic
349
cd05e6bd
JB
350# To avoid any implicit rule to kick in, define an empty command.
351scripts/basic/%: scripts_basic ;
352
4f193362 353PHONY += outputmakefile
fd5f0cd6
JB
354# outputmakefile generates a Makefile in the output directory, if using a
355# separate output directory. This allows convenient use of make in the
356# output directory.
1da177e4 357outputmakefile:
fd5f0cd6
JB
358ifneq ($(KBUILD_SRC),)
359 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
360 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
361endif
1da177e4
LT
362
363# To make sure we do not include .config for any of the *config targets
364# catch them early, and hand them over to scripts/kconfig/Makefile
365# It is allowed to specify more targets when calling make, including
366# mixing *config targets and build targets.
070b98bf 367# For example 'make oldconfig all'.
1da177e4
LT
368# Detect when mixed targets is specified, and make a second invocation
369# of make so .config is not included in this case either (for *config).
370
3eb3c740 371no-dot-config-targets := clean mrproper distclean \
c30a02e0 372 cscope TAGS tags help %docs check% \
3eb3c740
RZ
373 include/linux/version.h headers_% \
374 kernelrelease kernelversion
1da177e4
LT
375
376config-targets := 0
377mixed-targets := 0
378dot-config := 1
379
380ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
381 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
382 dot-config := 0
383 endif
384endif
385
386ifeq ($(KBUILD_EXTMOD),)
387 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
388 config-targets := 1
389 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
390 mixed-targets := 1
391 endif
392 endif
393endif
394
395ifeq ($(mixed-targets),1)
396# ===========================================================================
397# We're called with mixed targets (*config and build targets).
398# Handle them one by one.
399
400%:: FORCE
401 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
402
403else
404ifeq ($(config-targets),1)
405# ===========================================================================
406# *config targets only - make sure prerequisites are updated, and descend
407# in scripts/kconfig to make the *config target
408
409# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
410# KBUILD_DEFCONFIG may point out an alternative default configuration
411# used for 'make defconfig'
412include $(srctree)/arch/$(ARCH)/Makefile
413export KBUILD_DEFCONFIG
414
cd05e6bd 415config %config: scripts_basic outputmakefile FORCE
c955ccaf 416 $(Q)mkdir -p include/linux include/config
1da177e4
LT
417 $(Q)$(MAKE) $(build)=scripts/kconfig $@
418
419else
420# ===========================================================================
421# Build targets only - this includes vmlinux, arch specific targets, clean
422# targets and others. In general all targets except *config targets.
423
424ifeq ($(KBUILD_EXTMOD),)
425# Additional helpers built in scripts/
426# Carefully list dependencies so we do not try to build scripts twice
070b98bf 427# in parallel
4f193362 428PHONY += scripts
2e3646e5 429scripts: scripts_basic include/config/auto.conf
1da177e4
LT
430 $(Q)$(MAKE) $(build)=$(@)
431
1da177e4
LT
432# Objects we will link into vmlinux / subdirs we need to visit
433init-y := init/
434drivers-y := drivers/ sound/
435net-y := net/
436libs-y := lib/
437core-y := usr/
438endif # KBUILD_EXTMOD
439
440ifeq ($(dot-config),1)
9ee4e336
SR
441# Read in config
442-include include/config/auto.conf
1da177e4 443
9ee4e336 444ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
445# Read in dependencies to all Kconfig* files, make sure to run
446# oldconfig if changes are detected.
c955ccaf 447-include include/config/auto.conf.cmd
1da177e4 448
1da177e4 449# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 450$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 451
c955ccaf 452# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 453# with it and forgot to run make oldconfig.
070b98bf 454# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 455# we execute the config step to be sure to catch updated Kconfig files
14cdd3c4 456include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 457 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 458else
9ee4e336
SR
459# external modules needs include/linux/autoconf.h and include/config/auto.conf
460# but do not care if they are up-to-date. Use auto.conf to trigger the test
461PHONY += include/config/auto.conf
462
463include/config/auto.conf:
464 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
465 echo; \
466 echo " ERROR: Kernel configuration is invalid."; \
467 echo " include/linux/autoconf.h or $@ are missing."; \
468 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
469 echo; \
470 /bin/false)
471
472endif # KBUILD_EXTMOD
c955ccaf 473
1da177e4
LT
474else
475# Dummy target needed, because used as prerequisite
c955ccaf 476include/config/auto.conf: ;
9ee4e336 477endif # $(dot-config)
1da177e4
LT
478
479# The all: target is the default when no target is given on the
480# command line.
481# This allow a user to issue only 'make' to build a kernel including modules
070b98bf 482# Defaults vmlinux but it is usually overridden in the arch makefile
1da177e4
LT
483all: vmlinux
484
485ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
486CFLAGS += -Os
487else
488CFLAGS += -O2
489endif
490
c9eca0b9
SR
491include $(srctree)/arch/$(ARCH)/Makefile
492
1da177e4 493ifdef CONFIG_FRAME_POINTER
b4652239 494CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
1da177e4
LT
495else
496CFLAGS += -fomit-frame-pointer
497endif
498
499ifdef CONFIG_DEBUG_INFO
500CFLAGS += -g
501endif
502
c9eca0b9
SR
503# Force gcc to behave correct even for buggy distributions
504CFLAGS += $(call cc-option, -fno-stack-protector)
1da177e4 505
e8e69931 506# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 507NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
508CHECKFLAGS += $(NOSTDINC_FLAGS)
509
1da177e4
LT
510# warn about C99 declaration after statement
511CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
512
070b98bf 513# disable pointer signed / unsigned warnings in gcc 4.0
1da177e4
LT
514CFLAGS += $(call cc-option,-Wno-pointer-sign,)
515
516# Default kernel image to build when no specific target is given.
070b98bf 517# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
518# set in the environment
519# Also any assignments in arch/$(ARCH)/Makefile take precedence over
520# this default value
521export KBUILD_IMAGE ?= vmlinux
522
523#
524# INSTALL_PATH specifies where to place the updated kernel and system map
525# images. Default is /boot, but you can set it to other values
526export INSTALL_PATH ?= /boot
527
528#
529# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
530# relocations required by build roots. This is not defined in the
070b98bf 531# makefile but the argument can be passed to make if needed.
1da177e4
LT
532#
533
df9df036 534MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
535export MODLIB
536
ac031f26
TT
537#
538# INSTALL_MOD_STRIP, if defined, will cause modules to be
539# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
540# the default option --strip-debug will be used. Otherwise,
541# INSTALL_MOD_STRIP will used as the options to the strip command.
542
543ifdef INSTALL_MOD_STRIP
544ifeq ($(INSTALL_MOD_STRIP),1)
e340221a 545mod_strip_cmd = $(STRIP) --strip-debug
ac031f26
TT
546else
547mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
548endif # INSTALL_MOD_STRIP=1
549else
550mod_strip_cmd = true
551endif # INSTALL_MOD_STRIP
552export mod_strip_cmd
553
1da177e4
LT
554
555ifeq ($(KBUILD_EXTMOD),)
3a65dfe8 556core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
557
558vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
559 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
560 $(net-y) $(net-m) $(libs-y) $(libs-m)))
561
562vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
563 $(init-n) $(init-) \
564 $(core-n) $(core-) $(drivers-n) $(drivers-) \
565 $(net-n) $(net-) $(libs-n) $(libs-))))
566
567init-y := $(patsubst %/, %/built-in.o, $(init-y))
568core-y := $(patsubst %/, %/built-in.o, $(core-y))
569drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
570net-y := $(patsubst %/, %/built-in.o, $(net-y))
571libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
572libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
573libs-y := $(libs-y1) $(libs-y2)
574
575# Build vmlinux
576# ---------------------------------------------------------------------------
070b98bf 577# vmlinux is built from the objects selected by $(vmlinux-init) and
1da177e4 578# $(vmlinux-main). Most are built-in.o files from top-level directories
2462566f 579# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
1da177e4
LT
580# Ordering when linking is important, and $(vmlinux-init) must be first.
581#
582# vmlinux
583# ^
584# |
585# +-< $(vmlinux-init)
586# | +--< init/version.o + more
587# |
588# +--< $(vmlinux-main)
589# | +--< driver/built-in.o mm/built-in.o + more
590# |
591# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
592#
593# vmlinux version (uname -v) cannot be updated during normal
594# descending-into-subdirs phase since we do not yet know if we need to
595# update vmlinux.
596# Therefore this step is delayed until just before final link of vmlinux -
597# except in the kallsyms case where it is done just before adding the
598# symbols to the kernel.
599#
600# System.map is generated to document addresses of all kernel symbols
601
602vmlinux-init := $(head-y) $(init-y)
603vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
604vmlinux-all := $(vmlinux-init) $(vmlinux-main)
605vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
85bd2fdd 606export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
1da177e4
LT
607
608# Rule to link vmlinux - also used during CONFIG_KALLSYMS
609# May be overridden by arch/$(ARCH)/Makefile
610quiet_cmd_vmlinux__ ?= LD $@
611 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
612 -T $(vmlinux-lds) $(vmlinux-init) \
613 --start-group $(vmlinux-main) --end-group \
614 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
615
616# Generate new vmlinux version
617quiet_cmd_vmlinux_version = GEN .version
618 cmd_vmlinux_version = set -e; \
4e25d8bb
JB
619 if [ ! -r .version ]; then \
620 rm -f .version; \
621 echo 1 >.version; \
622 else \
623 mv .version .old_version; \
624 expr 0$$(cat .old_version) + 1 >.version; \
625 fi; \
1da177e4
LT
626 $(MAKE) $(build)=init
627
628# Generate System.map
070b98bf 629quiet_cmd_sysmap = SYSMAP
1da177e4
LT
630 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
631
632# Link of vmlinux
633# If CONFIG_KALLSYMS is set .version is already updated
634# Generate System.map and verify that the content is consistent
39ca371c
MR
635# Use + in front of the vmlinux_version rule to silent warning with make -j2
636# First command is ':' to allow us to use + in front of the rule
1da177e4 637define rule_vmlinux__
39ca371c 638 :
1da177e4
LT
639 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
640
641 $(call cmd,vmlinux__)
642 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
643
4635281c
SR
644 $(Q)$(if $($(quiet)cmd_sysmap), \
645 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
646 $(cmd_sysmap) $@ System.map; \
647 if [ $$? -ne 0 ]; then \
648 rm -f $@; \
649 /bin/false; \
1da177e4
LT
650 fi;
651 $(verify_kallsyms)
652endef
653
654
655ifdef CONFIG_KALLSYMS
656# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
657# It's a three stage process:
658# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
659# empty
660# Running kallsyms on that gives us .tmp_kallsyms1.o with
661# the right size - vmlinux version (uname -v) is updated during this step
662# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
663# but due to the added section, some addresses have shifted.
664# From here, we generate a correct .tmp_kallsyms2.o
665# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
666# o Verify that the System.map from vmlinux matches the map from
667# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
668# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
669# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
670# temporary bypass to allow the kernel to be built while the
671# maintainers work out what went wrong with kallsyms.
672
673ifdef CONFIG_KALLSYMS_EXTRA_PASS
674last_kallsyms := 3
675else
676last_kallsyms := 2
677endif
678
679kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
680
681define verify_kallsyms
4635281c
SR
682 $(Q)$(if $($(quiet)cmd_sysmap), \
683 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
1da177e4 684 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
4635281c
SR
685 $(Q)cmp -s System.map .tmp_System.map || \
686 (echo Inconsistent kallsyms data; \
687 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
1da177e4
LT
688 rm .tmp_kallsyms* ; /bin/false )
689endef
690
691# Update vmlinux version before link
692# Use + in front of this rule to silent warning about make -j1
72ba47c1 693# First command is ':' to allow us to use + in front of this rule
1da177e4
LT
694cmd_ksym_ld = $(cmd_vmlinux__)
695define rule_ksym_ld
72ba47c1 696 :
1da177e4
LT
697 +$(call cmd,vmlinux_version)
698 $(call cmd,vmlinux__)
699 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
700endef
701
702# Generate .S file with all kernel symbols
703quiet_cmd_kallsyms = KSYM $@
704 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
705 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
706
707.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
708 $(call if_changed_dep,as_o_S)
709
710.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
711 $(call cmd,kallsyms)
712
713# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
714.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
715 $(call if_changed_rule,ksym_ld)
716
717.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
718 $(call if_changed,vmlinux__)
719
720.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
721 $(call if_changed,vmlinux__)
722
723# Needs to visit scripts/ before $(KALLSYMS) can be used.
724$(KALLSYMS): scripts ;
725
33bc25ea
SR
726# Generate some data for debugging strange kallsyms problems
727debug_kallsyms: .tmp_map$(last_kallsyms)
728
729.tmp_map%: .tmp_vmlinux% FORCE
730 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
731
732.tmp_map3: .tmp_map2
733
734.tmp_map2: .tmp_map1
735
1da177e4
LT
736endif # ifdef CONFIG_KALLSYMS
737
738# vmlinux image - including updated kernel symbols
739vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
0f836e5f 740ifdef CONFIG_HEADERS_CHECK
0e7af8d0 741 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
0f836e5f 742endif
1da177e4 743 $(call if_changed_rule,vmlinux__)
12715d20 744 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
4e25d8bb 745 $(Q)rm -f .old_version
1da177e4
LT
746
747# The actual objects are generated when descending,
748# make sure no implicit rule kicks in
749$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
750
751# Handle descending into subdirectories listed in $(vmlinux-dirs)
752# Preset locale variables to speed up the build process. Limit locale
753# tweaks to this spot to avoid wrong language settings when running
754# make menuconfig etc.
755# Error messages still appears in the original language
756
4f193362 757PHONY += $(vmlinux-dirs)
5bb78269 758$(vmlinux-dirs): prepare scripts
1da177e4
LT
759 $(Q)$(MAKE) $(build)=$@
760
cb58455c 761# Build the kernel release string
cb58455c 762#
1ef98856
RD
763# The KERNELRELEASE value built here is stored in the file
764# include/config/kernel.release, and is used when executing several
765# make targets, such as "make install" or "make modules_install."
766#
767# The eventual kernel release string consists of the following fields,
768# shown in a hierarchical format to show how smaller parts are concatenated
769# to form the larger and final value, with values coming from places like
770# the Makefile, kernel config options, make command line options and/or
771# SCM tag information.
772#
773# $(KERNELVERSION)
774# $(VERSION) eg, 2
775# $(PATCHLEVEL) eg, 6
776# $(SUBLEVEL) eg, 18
777# $(EXTRAVERSION) eg, -rc6
778# $(localver-full)
779# $(localver)
76c32956 780# localversion* (files without backups, containing '~')
1ef98856
RD
781# $(CONFIG_LOCALVERSION) (from kernel config setting)
782# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
783# ./scripts/setlocalversion (SCM tag, if one exists)
784# $(LOCALVERSION) (from make command line if provided)
785#
786# Note how the final $(localver-auto) string is included *only* if the
787# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
788# moment, only git is supported but other SCMs can edit the script
789# scripts/setlocalversion and add the appropriate checks as needed.
cb58455c 790
76c32956
OV
791pattern = ".*/localversion[^~]*"
792string = $(shell cat /dev/null \
fd19e44f 793 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
cb58455c 794
76c32956
OV
795localver = $(subst $(space),, $(string) \
796 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
070b98bf 797
cb58455c
SR
798# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
799# and if the SCM is know a tag from the SCM is appended.
070b98bf 800# The appended tag is determined by the SCM used.
cb58455c
SR
801#
802# Currently, only git is supported.
803# Other SCMs can edit scripts/setlocalversion and add the appropriate
804# checks as needed.
805ifdef CONFIG_LOCALVERSION_AUTO
806 _localver-auto = $(shell $(CONFIG_SHELL) \
807 $(srctree)/scripts/setlocalversion $(srctree))
808 localver-auto = $(LOCALVERSION)$(_localver-auto)
809endif
810
811localver-full = $(localver)$(localver-auto)
812
f1d28fb0 813# Store (new) KERNELRELASE string in include/config/kernel.release
2244cbd8 814kernelrelease = $(KERNELVERSION)$(localver-full)
f1d28fb0 815include/config/kernel.release: include/config/auto.conf FORCE
2244cbd8
SR
816 $(Q)rm -f $@
817 $(Q)echo $(kernelrelease) > $@
cb58455c
SR
818
819
1da177e4 820# Things we need to do before we recursively start building the kernel
5bb78269
SR
821# or the modules are listed in "prepare".
822# A multi level approach is used. prepareN is processed before prepareN-1.
823# archprepare is used in arch Makefiles and when processed asm symlink,
824# version.h and scripts_basic is processed / created.
1da177e4 825
5bb78269 826# Listed in dependency order
4f193362 827PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 828
86feeaa8 829# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
830# and if so do:
831# 1) Check that make has not been executed in the kernel src $(srctree)
832# 2) Create the include2 directory, used for the second asm symlink
f1d28fb0 833prepare3: include/config/kernel.release
1da177e4
LT
834ifneq ($(KBUILD_SRC),)
835 @echo ' Using $(srctree) as source for kernel'
c955ccaf 836 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1da177e4
LT
837 echo " $(srctree) is not clean, please run 'make mrproper'";\
838 echo " in the '$(srctree)' directory.";\
839 /bin/false; \
840 fi;
841 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
842 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
843endif
844
86feeaa8
SR
845# prepare2 creates a makefile if using a separate output directory
846prepare2: prepare3 outputmakefile
1da177e4 847
3eb3c740
RZ
848prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
849 include/asm include/config/auto.conf
1da177e4 850ifneq ($(KBUILD_MODULES),)
1da177e4 851 $(Q)mkdir -p $(MODVERDIR)
fca1dff2 852 $(Q)rm -f $(MODVERDIR)/*
1da177e4
LT
853endif
854
5bb78269
SR
855archprepare: prepare1 scripts_basic
856
857prepare0: archprepare FORCE
8d36a623 858 $(Q)$(MAKE) $(build)=.
c53aeca0 859 $(Q)$(MAKE) $(build)=. missing-syscalls
86feeaa8 860
1da177e4 861# All the preparing..
d395efb5 862prepare: prepare0
1da177e4 863
070b98bf
SR
864# Leave this as default for preprocessing vmlinux.lds.S, which is now
865# done in arch/$(ARCH)/kernel/Makefile
1da177e4
LT
866
867export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
868
070b98bf
SR
869# FIXME: The asm symlink changes when $(ARCH) changes. That's
870# hard to detect, but I suppose "make mrproper" is a good idea
871# before switching between archs anyway.
1da177e4
LT
872
873include/asm:
874 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
875 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
876 @ln -fsn asm-$(ARCH) $@
877
1da177e4
LT
878# Generate some files
879# ---------------------------------------------------------------------------
880
881# KERNELRELEASE can change from a few different places, meaning version.h
882# needs to be updated, so this check is forced on all builds
883
884uts_len := 64
63104eec
SR
885define filechk_utsrelease.h
886 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
887 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
888 exit 1; \
889 fi; \
890 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
891endef
1da177e4
LT
892
893define filechk_version.h
63104eec
SR
894 (echo \#define LINUX_VERSION_CODE $(shell \
895 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
896 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
897endef
898
63104eec 899include/linux/version.h: $(srctree)/Makefile FORCE
1da177e4
LT
900 $(call filechk,version.h)
901
63104eec
SR
902include/linux/utsrelease.h: include/config/kernel.release FORCE
903 $(call filechk,utsrelease.h)
904
1da177e4
LT
905# ---------------------------------------------------------------------------
906
4f193362 907PHONY += depend dep
1da177e4
LT
908depend dep:
909 @echo '*** Warning: make $@ is unnecessary now.'
910
8d730cfb
DW
911# ---------------------------------------------------------------------------
912# Kernel headers
1ab7a1f3 913INSTALL_HDR_PATH=$(objtree)/usr
8d730cfb
DW
914export INSTALL_HDR_PATH
915
6d716275
DW
916HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
917
918PHONY += headers_install_all
3eb3c740 919headers_install_all: include/linux/version.h scripts_basic FORCE
398477d4 920 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
6d716275 921 $(Q)for arch in $(HDRARCHES); do \
398477d4 922 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
6d716275
DW
923 done
924
8d730cfb 925PHONY += headers_install
3eb3c740 926headers_install: include/linux/version.h scripts_basic FORCE
0e7af8d0 927 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
f17b7bad
DW
928 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
929 exit 1 ; fi
07aea3a7 930 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
b805aa0e 931 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
8d730cfb 932
1f85712e
MF
933PHONY += headers_check_all
934headers_check_all: headers_install_all
935 $(Q)for arch in $(HDRARCHES); do \
936 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
937 done
938
68475359
DW
939PHONY += headers_check
940headers_check: headers_install
b805aa0e 941 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
68475359 942
1da177e4
LT
943# ---------------------------------------------------------------------------
944# Modules
945
946ifdef CONFIG_MODULES
947
070b98bf 948# By default, build modules as well
1da177e4
LT
949
950all: modules
951
952# Build modules
953
4f193362 954PHONY += modules
1da177e4
LT
955modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
956 @echo ' Building modules, stage 2.';
b805aa0e 957 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4
LT
958
959
960# Target to prepare building external modules
4f193362 961PHONY += modules_prepare
5bb78269 962modules_prepare: prepare scripts
1da177e4
LT
963
964# Target to install modules
4f193362 965PHONY += modules_install
1da177e4
LT
966modules_install: _modinst_ _modinst_post
967
4f193362 968PHONY += _modinst_
1da177e4 969_modinst_:
ce454d4d 970 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1da177e4
LT
971 echo "Warning: you may need to install module-init-tools"; \
972 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
973 sleep 1; \
974 fi
975 @rm -rf $(MODLIB)/kernel
976 @rm -f $(MODLIB)/source
977 @mkdir -p $(MODLIB)/kernel
978 @ln -s $(srctree) $(MODLIB)/source
979 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
980 rm -f $(MODLIB)/build ; \
981 ln -s $(objtree) $(MODLIB)/build ; \
982 fi
b805aa0e 983 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4
LT
984
985# If System.map exists, run depmod. This deliberately does not have a
986# dependency on System.map since that would run the dependency tree on
987# vmlinux. This depmod is only for convenience to give the initial
988# boot a modules.dep even before / is mounted read-write. However the
989# boot script depmod is the master version.
990ifeq "$(strip $(INSTALL_MOD_PATH))" ""
991depmod_opts :=
992else
993depmod_opts := -b $(INSTALL_MOD_PATH) -r
994endif
4f193362 995PHONY += _modinst_post
1da177e4
LT
996_modinst_post: _modinst_
997 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
998
999else # CONFIG_MODULES
1000
1001# Modules not configured
1002# ---------------------------------------------------------------------------
1003
1004modules modules_install: FORCE
1005 @echo
1006 @echo "The present kernel configuration has modules disabled."
1007 @echo "Type 'make config' and enable loadable module support."
1008 @echo "Then build a kernel with module support enabled."
1009 @echo
1010 @exit 1
1011
1012endif # CONFIG_MODULES
1013
1da177e4
LT
1014###
1015# Cleaning is done on three levels.
1016# make clean Delete most generated files
1017# Leave enough to build external modules
1018# make mrproper Delete the current configuration, and all generated files
1019# make distclean Remove editor backup files, patch leftover files and the like
1020
1021# Directories & files removed with 'make clean'
1022CLEAN_DIRS += $(MODVERDIR)
1023CLEAN_FILES += vmlinux System.map \
1024 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1025
1026# Directories & files removed with 'make mrproper'
1ab7a1f3 1027MRPROPER_DIRS += include/config include2 usr/include
50aa88e2 1028MRPROPER_FILES += .config .config.old include/asm .version .old_version \
3eb3c740
RZ
1029 include/linux/autoconf.h include/linux/version.h \
1030 include/linux/utsrelease.h \
f1d28fb0 1031 Module.symvers tags TAGS cscope*
1da177e4
LT
1032
1033# clean - Delete most, but leave enough to build external modules
1034#
1035clean: rm-dirs := $(CLEAN_DIRS)
1036clean: rm-files := $(CLEAN_FILES)
86feeaa8 1037clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1da177e4 1038
4f193362 1039PHONY += $(clean-dirs) clean archclean
1da177e4
LT
1040$(clean-dirs):
1041 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1042
1043clean: archclean $(clean-dirs)
1044 $(call cmd,rmdirs)
1045 $(call cmd,rmfiles)
1046 @find . $(RCS_FIND_IGNORE) \
070b98bf 1047 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
15fde675
AG
1048 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1049 -o -name '*.symtypes' \) \
1da177e4
LT
1050 -type f -print | xargs rm -f
1051
1052# mrproper - Delete all generated files, including .config
1053#
1054mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1055mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1056mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1057
4f193362 1058PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1059$(mrproper-dirs):
1060 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1061
1062mrproper: clean archmrproper $(mrproper-dirs)
1063 $(call cmd,rmdirs)
1064 $(call cmd,rmfiles)
1065
1066# distclean
1067#
4f193362 1068PHONY += distclean
1da177e4
LT
1069
1070distclean: mrproper
1071 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1072 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1073 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
070b98bf 1074 -o -name '.*.rej' -o -size 0 \
1da177e4
LT
1075 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1076 -type f -print | xargs rm -f
1077
1078
1079# Packaging of the kernel to various formats
1080# ---------------------------------------------------------------------------
1081# rpm target kept for backward compatibility
1082package-dir := $(srctree)/scripts/package
1083
031ecc6d 1084%pkg: include/config/kernel.release FORCE
6c2133e1 1085 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1086rpm: include/config/kernel.release FORCE
6c2133e1 1087 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1088
1089
1090# Brief documentation of the typical targets used
1091# ---------------------------------------------------------------------------
1092
1093boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1094boards := $(notdir $(boards))
1095
1096help:
1097 @echo 'Cleaning targets:'
5ea084ef 1098 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1099 @echo ' enough build support to build external modules'
5ea084ef 1100 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1101 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1102 @echo ''
1103 @echo 'Configuration targets:'
1104 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1105 @echo ''
1106 @echo 'Other generic targets:'
1107 @echo ' all - Build all targets marked with [*]'
1108 @echo '* vmlinux - Build the bare kernel'
1109 @echo '* modules - Build all modules'
9cc5d74c 1110 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1da177e4
LT
1111 @echo ' dir/ - Build all files in dir and below'
1112 @echo ' dir/file.[ois] - Build specified target only'
155ad605 1113 @echo ' dir/file.ko - Build module including final link'
1da177e4
LT
1114 @echo ' rpm - Build a kernel as an RPM package'
1115 @echo ' tags/TAGS - Generate tags file for editors'
1116 @echo ' cscope - Generate cscope index'
6d128842 1117 @echo ' kernelrelease - Output the release version string'
cb58455c 1118 @echo ' kernelversion - Output the version stored in Makefile'
59df3230 1119 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
f17b7bad 1120 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1121 echo ' (default: $(INSTALL_HDR_PATH))'; \
f17b7bad 1122 fi
1da177e4
LT
1123 @echo ''
1124 @echo 'Static analysers'
1da177e4
LT
1125 @echo ' checkstack - Generate a list of stack hogs'
1126 @echo ' namespacecheck - Name space analysis on compiled kernel'
59df3230 1127 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
f17b7bad
DW
1128 echo ' headers_check - Sanity check on exported headers'; \
1129 fi
1da177e4
LT
1130 @echo ''
1131 @echo 'Kernel packaging:'
6c2133e1 1132 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1133 @echo ''
1134 @echo 'Documentation targets:'
1135 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1136 @echo ''
1137 @echo 'Architecture specific targets ($(ARCH)):'
1138 @$(if $(archhelp),$(archhelp),\
1139 echo ' No architecture specific help defined for $(ARCH)')
1140 @echo ''
1141 @$(if $(boards), \
1142 $(foreach b, $(boards), \
1143 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1144 echo '')
1145
1146 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1147 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1148 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1149 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1150 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1da177e4
LT
1151 @echo ''
1152 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1153 @echo 'For further info see the ./README file'
1154
1155
1156# Documentation targets
1157# ---------------------------------------------------------------------------
1158%docs: scripts_basic FORCE
1159 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1160
1161else # KBUILD_EXTMOD
1162
1163###
1164# External module support.
1165# When building external modules the kernel used as basis is considered
1166# read-only, and no consistency checks are made and the make
1167# system is not used on the basis kernel. If updates are required
1168# in the basis kernel ordinary make commands (without M=...) must
1169# be used.
1170#
1171# The following are the only valid targets when building external
1172# modules.
1173# make M=dir clean Delete all automatically generated files
1174# make M=dir modules Make all modules in specified dir
1175# make M=dir Same as 'make M=dir modules'
1176# make M=dir modules_install
070b98bf 1177# Install the modules built in the module directory
1da177e4
LT
1178# Assumes install directory is already created
1179
1180# We are always building modules
1181KBUILD_MODULES := 1
4f193362 1182PHONY += crmodverdir
1da177e4
LT
1183crmodverdir:
1184 $(Q)mkdir -p $(MODVERDIR)
fca1dff2 1185 $(Q)rm -f $(MODVERDIR)/*
1da177e4 1186
4f193362 1187PHONY += $(objtree)/Module.symvers
1da177e4
LT
1188$(objtree)/Module.symvers:
1189 @test -e $(objtree)/Module.symvers || ( \
1190 echo; \
1191 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1192 echo " is missing; modules will have no dependencies and modversions."; \
1193 echo )
1194
1195module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1196PHONY += $(module-dirs) modules
1da177e4
LT
1197$(module-dirs): crmodverdir $(objtree)/Module.symvers
1198 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1199
1200modules: $(module-dirs)
1201 @echo ' Building modules, stage 2.';
b805aa0e 1202 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1203
4f193362 1204PHONY += modules_install
a67dc21a 1205modules_install: _emodinst_ _emodinst_post
e6304663 1206
4f193362
PS
1207install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1208PHONY += _emodinst_
a67dc21a 1209_emodinst_:
a67dc21a 1210 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1211 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1212
a67dc21a
SR
1213# Run depmod only is we have System.map and depmod is executable
1214quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1215 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1216 $(DEPMOD) -ae -F System.map \
1217 $(if $(strip $(INSTALL_MOD_PATH)), \
1218 -b $(INSTALL_MOD_PATH) -r) \
1219 $(KERNELRELEASE); \
1220 fi
1221
4f193362 1222PHONY += _emodinst_post
a67dc21a
SR
1223_emodinst_post: _emodinst_
1224 $(call cmd,depmod)
1225
1da177e4
LT
1226clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1227
4f193362 1228PHONY += $(clean-dirs) clean
1da177e4
LT
1229$(clean-dirs):
1230 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1231
1232clean: rm-dirs := $(MODVERDIR)
1233clean: $(clean-dirs)
1234 $(call cmd,rmdirs)
1235 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
070b98bf 1236 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1da177e4
LT
1237 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1238 -type f -print | xargs rm -f
1239
1240help:
1241 @echo ' Building external modules.'
1242 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1243 @echo ''
1244 @echo ' modules - default target, build the module(s)'
1245 @echo ' modules_install - install the module'
1246 @echo ' clean - remove generated files in module directory only'
1247 @echo ''
06300b21
SR
1248
1249# Dummies...
4f193362 1250PHONY += prepare scripts
06300b21
SR
1251prepare: ;
1252scripts: ;
1da177e4
LT
1253endif # KBUILD_EXTMOD
1254
1255# Generate tags for editors
1256# ---------------------------------------------------------------------------
1257
1258#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1259#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1260#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1261
f182ae62 1262ifeq ($(src),$(obj))
1da177e4
LT
1263__srctree =
1264else
1265__srctree = $(srctree)/
1266endif
1267
2ab23c95
PBG
1268ifeq ($(ALLSOURCE_ARCHS),)
1269ifeq ($(ARCH),um)
1270ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1271else
1272ALLINCLUDE_ARCHS := $(ARCH)
1273endif
1274else
070b98bf 1275#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
2ab23c95
PBG
1276ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1277endif
1278
a0674e88
IC
1279ALLSOURCE_ARCHS := $(ARCH)
1280
e838db68 1281define find-sources
dd7e54ad 1282 ( for ARCH in $(ALLSOURCE_ARCHS) ; do \
a0674e88 1283 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
e838db68 1284 -name $1 -print; \
a0674e88 1285 done ; \
1da177e4 1286 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
e838db68 1287 -name $1 -print; \
1da177e4
LT
1288 find $(__srctree)include $(RCS_FIND_IGNORE) \
1289 \( -name config -o -name 'asm-*' \) -prune \
e838db68 1290 -o -name $1 -print; \
2ab23c95 1291 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
a0674e88 1292 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
e838db68 1293 -name $1 -print; \
a0674e88 1294 done ; \
1da177e4 1295 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
dd7e54ad
DM
1296 -name $1 -print; \
1297 find $(__srctree) $(RCS_FIND_IGNORE) \
1298 \( -name include -o -name arch \) -prune -o \
1299 -name $1 -print; \
1300 )
e838db68
MY
1301endef
1302
1303define all-sources
1304 $(call find-sources,'*.[chS]')
1305endef
1306define all-kconfigs
1307 $(call find-sources,'Kconfig*')
1308endef
1309define all-defconfigs
1310 $(call find-sources,'defconfig')
1da177e4
LT
1311endef
1312
da7c0408
AG
1313define xtags
1314 if $1 --version 2>&1 | grep -iq exuberant; then \
1315 $(all-sources) | xargs $1 -a \
1316 -I __initdata,__exitdata,__acquires,__releases \
1317 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
91b943ee
AK
1318 --extra=+f --c-kinds=+px \
1319 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
da7c0408
AG
1320 $(all-kconfigs) | xargs $1 -a \
1321 --langdef=kconfig \
1322 --language-force=kconfig \
1323 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
18e39913 1324 $(all-defconfigs) | xargs -r $1 -a \
da7c0408
AG
1325 --langdef=dotconfig \
1326 --language-force=dotconfig \
1327 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1328 elif $1 --version 2>&1 | grep -iq emacs; then \
1329 $(all-sources) | xargs $1 -a; \
1330 $(all-kconfigs) | xargs $1 -a \
1331 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
18e39913 1332 $(all-defconfigs) | xargs -r $1 -a \
da7c0408
AG
1333 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1334 else \
1335 $(all-sources) | xargs $1 -a; \
1336 fi
1337endef
1338
1da177e4 1339quiet_cmd_cscope-file = FILELST cscope.files
acbef459 1340 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1da177e4
LT
1341
1342quiet_cmd_cscope = MAKE cscope.out
acbef459 1343 cmd_cscope = cscope -b
1da177e4
LT
1344
1345cscope: FORCE
1346 $(call cmd,cscope-file)
1347 $(call cmd,cscope)
1348
1349quiet_cmd_TAGS = MAKE $@
66d609ec
SR
1350define cmd_TAGS
1351 rm -f $@; \
da7c0408 1352 $(call xtags,etags)
66d609ec
SR
1353endef
1354
1355TAGS: FORCE
1356 $(call cmd,TAGS)
1da177e4 1357
1da177e4
LT
1358quiet_cmd_tags = MAKE $@
1359define cmd_tags
1360 rm -f $@; \
da7c0408 1361 $(call xtags,ctags)
1da177e4
LT
1362endef
1363
1da177e4
LT
1364tags: FORCE
1365 $(call cmd,tags)
1366
1367
1368# Scripts to check various things for consistency
1369# ---------------------------------------------------------------------------
1370
1da177e4
LT
1371includecheck:
1372 find * $(RCS_FIND_IGNORE) \
1373 -name '*.[hcS]' -type f -print | sort \
1374 | xargs $(PERL) -w scripts/checkincludes.pl
1375
1376versioncheck:
1377 find * $(RCS_FIND_IGNORE) \
1378 -name '*.[hcS]' -type f -print | sort \
1379 | xargs $(PERL) -w scripts/checkversion.pl
1380
1da177e4
LT
1381namespacecheck:
1382 $(PERL) $(srctree)/scripts/namespace.pl
1383
1384endif #ifeq ($(config-targets),1)
1385endif #ifeq ($(mixed-targets),1)
1386
c30a02e0 1387PHONY += checkstack kernelrelease kernelversion
e3ccf6e3 1388
011e3a9a
JD
1389# UML needs a little special treatment here. It wants to use the host
1390# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1391# else wants $(ARCH), including people doing cross-builds, which means
1392# that $(SUBARCH) doesn't work here.
1393ifeq ($(ARCH), um)
1394CHECKSTACK_ARCH := $(SUBARCH)
1395else
1396CHECKSTACK_ARCH := $(ARCH)
1397endif
1da177e4
LT
1398checkstack:
1399 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1400 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4
LT
1401
1402kernelrelease:
f1d28fb0
RZ
1403 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1404 $(error kernelrelease not valid - run 'make prepare' to update it))
cb58455c 1405kernelversion:
2244cbd8 1406 @echo $(KERNELVERSION)
1da177e4 1407
06300b21
SR
1408# Single targets
1409# ---------------------------------------------------------------------------
bc2546a6
SR
1410# Single targets are compatible with:
1411# - build whith mixed source and output
1412# - build with separate output dir 'make O=...'
1413# - external modules
1414#
1415# target-dir => where to store outputfile
1416# build-dir => directory in kernel source tree to use
1417
1418ifeq ($(KBUILD_EXTMOD),)
aa360879 1419 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1420 target-dir = $(dir $@)
1421else
1422 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1423 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1424 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1425endif
1426
f6ecebd6 1427%.s: %.c prepare scripts FORCE
bc2546a6 1428 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1429%.i: %.c prepare scripts FORCE
bc2546a6 1430 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1431%.o: %.c prepare scripts FORCE
bc2546a6 1432 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1433%.lst: %.c prepare scripts FORCE
bc2546a6 1434 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1435%.s: %.S prepare scripts FORCE
bc2546a6 1436 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1437%.o: %.S prepare scripts FORCE
bc2546a6 1438 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1439%.symtypes: %.c prepare scripts FORCE
1440 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1441
bc2546a6
SR
1442# Modules
1443/ %/: prepare scripts FORCE
06300b21 1444 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1445 $(build)=$(build-dir)
1446%.ko: prepare scripts FORCE
06300b21 1447 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1448 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1449 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1450
1da177e4
LT
1451# FIXME Should go into a make.lib or something
1452# ===========================================================================
1453
1454quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1455 cmd_rmdirs = rm -rf $(rm-dirs)
1456
1457quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1458 cmd_rmfiles = rm -f $(rm-files)
1459
1460
1461a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1462 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
5e8d780d 1463 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1da177e4
LT
1464
1465quiet_cmd_as_o_S = AS $@
1466cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1467
1468# read all saved command lines
1469
1470targets := $(wildcard $(sort $(targets)))
1471cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1472
1473ifneq ($(cmd_files),)
1474 $(cmd_files): ; # Do not try to update included dependency files
1475 include $(cmd_files)
1476endif
1477
1da177e4
LT
1478# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1479# Usage:
1480# $(Q)$(MAKE) $(clean)=dir
1481clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1482
1da177e4
LT
1483endif # skip-makefile
1484
4f193362 1485PHONY += FORCE
1da177e4 1486FORCE:
4f193362 1487
15964864
OV
1488# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1489Makefile: ;
4f193362
PS
1490
1491# Declare the contents of the .PHONY variable as phony. We keep that
1492# information in a variable se we can use it in if_changed and friends.
1493.PHONY: $(PHONY)