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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
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1da177e4
LT
1VERSION = 2
2PATCHLEVEL = 6
28d0325c 3SUBLEVEL = 31
4be3bd78 4EXTRAVERSION = -rc4
59a3759d 5NAME = Man-Eating Seals of Antiquity
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
d384e35a 15# (this increases performance and avoids hard-to-debug behaviour);
15964864
OV
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
b8b0618c
CR
38ifeq ("$(origin V)", "command line")
39 KBUILD_VERBOSE = $(V)
1da177e4
LT
40endif
41ifndef KBUILD_VERBOSE
42 KBUILD_VERBOSE = 0
43endif
44
1c7bafe7
RD
45# Call a source code checker (by default, "sparse") as part of the
46# C compilation.
47#
48# Use 'make C=1' to enable checking of only re-compiled files.
49# Use 'make C=2' to enable checking of *all* source files, regardless
50# of whether they are re-compiled or not.
51#
52# See the file "Documentation/sparse.txt" for more details, including
53# where to get the "sparse" utility.
1da177e4 54
b8b0618c
CR
55ifeq ("$(origin C)", "command line")
56 KBUILD_CHECKSRC = $(C)
1da177e4
LT
57endif
58ifndef KBUILD_CHECKSRC
59 KBUILD_CHECKSRC = 0
60endif
61
62# Use make M=dir to specify directory of external module to build
63# Old syntax make ... SUBDIRS=$PWD is still supported
64# Setting the environment variable KBUILD_EXTMOD take precedence
65ifdef SUBDIRS
66 KBUILD_EXTMOD ?= $(SUBDIRS)
67endif
1da177e4 68
b8b0618c
CR
69ifeq ("$(origin M)", "command line")
70 KBUILD_EXTMOD := $(M)
71endif
1da177e4
LT
72
73# kbuild supports saving output files in a separate directory.
74# To locate output files in a separate directory two syntaxes are supported.
75# In both cases the working directory must be the root of the kernel src.
76# 1) O=
77# Use "make O=dir/to/store/output/files/"
070b98bf 78#
1da177e4
LT
79# 2) Set KBUILD_OUTPUT
80# Set the environment variable KBUILD_OUTPUT to point to the directory
81# where the output files shall be placed.
82# export KBUILD_OUTPUT=dir/to/store/output/files/
83# make
84#
85# The O= assignment takes precedence over the KBUILD_OUTPUT environment
86# variable.
87
88
89# KBUILD_SRC is set on invocation of make in OBJ directory
90# KBUILD_SRC is not intended to be used by the regular user (for now)
91ifeq ($(KBUILD_SRC),)
92
93# OK, Make called in directory where kernel src resides
94# Do we want to locate output files in a separate directory?
b8b0618c
CR
95ifeq ("$(origin O)", "command line")
96 KBUILD_OUTPUT := $(O)
1da177e4
LT
97endif
98
99# That's our default target when none is given on the command line
4f193362 100PHONY := _all
1da177e4
LT
101_all:
102
1cacc9ab
SR
103# Cancel implicit rules on top Makefile
104$(CURDIR)/Makefile Makefile: ;
105
1da177e4
LT
106ifneq ($(KBUILD_OUTPUT),)
107# Invoke a second make in the output directory, passing relevant variables
108# check that the output directory actually exists
109saved-output := $(KBUILD_OUTPUT)
110KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
111$(if $(KBUILD_OUTPUT),, \
112 $(error output directory "$(saved-output)" does not exist))
1da177e4 113
0b35786d
MM
114PHONY += $(MAKECMDGOALS) sub-make
115
1cacc9ab 116$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
0b35786d
MM
117 $(Q)@:
118
119sub-make: FORCE
23a45e2c
SR
120 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
121 KBUILD_SRC=$(CURDIR) \
0b35786d
MM
122 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
123 $(filter-out _all sub-make,$(MAKECMDGOALS))
1da177e4
LT
124
125# Leave processing to above invocation of make
126skip-makefile := 1
127endif # ifneq ($(KBUILD_OUTPUT),)
128endif # ifeq ($(KBUILD_SRC),)
129
130# We process the rest of the Makefile if this is the final invocation of make
131ifeq ($(skip-makefile),)
132
133# If building an external module we do not care about the all: rule
134# but instead _all depend on modules
4f193362 135PHONY += all
1da177e4
LT
136ifeq ($(KBUILD_EXTMOD),)
137_all: all
138else
139_all: modules
140endif
141
142srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
1da177e4
LT
143objtree := $(CURDIR)
144src := $(srctree)
145obj := $(objtree)
146
0f558c33 147VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1da177e4 148
11294235 149export srctree objtree VPATH
1da177e4 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/ \
236b1957 161 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
3cc000b5 162 -e s/sh[234].*/sh/ )
1da177e4
LT
163
164# Cross compiling and selecting different set of gcc/bin-utils
165# ---------------------------------------------------------------------------
166#
167# When performing cross compilation for other architectures ARCH shall be set
168# to the target architecture. (See arch/* for the possibilities).
169# ARCH can be set during invocation of make:
170# make ARCH=ia64
171# Another way is to have ARCH set in the environment.
172# The default ARCH is the host where make is executed.
173
174# CROSS_COMPILE specify the prefix used for all executables used
175# during compilation. Only gcc and related bin-utils executables
176# are prefixed with $(CROSS_COMPILE).
177# CROSS_COMPILE can be set on the command line
178# make CROSS_COMPILE=ia64-linux-
179# Alternatively CROSS_COMPILE can be set in the environment.
180# Default value for CROSS_COMPILE is not to prefix executables
181# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
4ce6efed 182export KBUILD_BUILDHOST := $(SUBARCH)
1da177e4
LT
183ARCH ?= $(SUBARCH)
184CROSS_COMPILE ?=
185
186# Architecture as present in compile.h
6752ed90
TG
187UTS_MACHINE := $(ARCH)
188SRCARCH := $(ARCH)
1da177e4 189
d746d647
SR
190# Additional ARCH settings for x86
191ifeq ($(ARCH),i386)
192 SRCARCH := x86
193endif
194ifeq ($(ARCH),x86_64)
195 SRCARCH := x86
196endif
74b469f2 197
5e538790 198# Additional ARCH settings for sparc
a439fe51 199ifeq ($(ARCH),sparc64)
5e538790 200 SRCARCH := sparc
a439fe51 201endif
2fb9b1bd 202
3cc000b5
PM
203# Additional ARCH settings for sh
204ifeq ($(ARCH),sh64)
205 SRCARCH := sh
206endif
207
5e538790
SR
208# Where to locate arch specific headers
209hdr-arch := $(SRCARCH)
210
49148020
SR
211ifeq ($(ARCH),m68knommu)
212 hdr-arch := m68k
213endif
214
14cdd3c4
RZ
215KCONFIG_CONFIG ?= .config
216
1da177e4
LT
217# SHELL used by kbuild
218CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
219 else if [ -x /bin/bash ]; then echo /bin/bash; \
220 else echo sh; fi ; fi)
221
070b98bf
SR
222HOSTCC = gcc
223HOSTCXX = g++
224HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
225HOSTCXXFLAGS = -O2
1da177e4 226
070b98bf
SR
227# Decide whether to build built-in, modular, or both.
228# Normally, just do built-in.
1da177e4
LT
229
230KBUILD_MODULES :=
231KBUILD_BUILTIN := 1
232
233# If we have only "make modules", don't compile built-in objects.
234# When we're building modules with modversions, we need to consider
235# the built-in objects during the descend as well, in order to
070b98bf 236# make sure the checksums are up to date before we record them.
1da177e4
LT
237
238ifeq ($(MAKECMDGOALS),modules)
239 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
240endif
241
242# If we have "make <whatever> modules", compile modules
243# in addition to whatever we do anyway.
244# Just "make" or "make all" shall build modules as well
245
246ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
247 KBUILD_MODULES := 1
248endif
249
250ifeq ($(MAKECMDGOALS),)
251 KBUILD_MODULES := 1
252endif
253
e579d351 254export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
255export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
256
257# Beautify output
258# ---------------------------------------------------------------------------
259#
260# Normally, we echo the whole command before executing it. By making
261# that echo $($(quiet)$(cmd)), we now have the possibility to set
262# $(quiet) to choose other forms of output instead, e.g.
263#
264# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
265# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
266#
267# If $(quiet) is empty, the whole command will be printed.
268# If it is set to "quiet_", only the short version will be printed.
070b98bf 269# If it is set to "silent_", nothing will be printed at all, since
1da177e4
LT
270# the variable $(silent_cmd_cc_o_c) doesn't exist.
271#
a58a414f 272# A simple variant is to prefix commands with $(Q) - that's useful
1da177e4
LT
273# for commands that shall be hidden in non-verbose mode.
274#
275# $(Q)ln $@ :<
276#
277# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
278# If KBUILD_VERBOSE equals 1 then the above command is displayed.
279
280ifeq ($(KBUILD_VERBOSE),1)
281 quiet =
282 Q =
283else
284 quiet=quiet_
285 Q = @
286endif
287
288# If the user is running make -s (silent mode), suppress echoing of
289# commands
290
291ifneq ($(findstring s,$(MAKEFLAGS)),)
292 quiet=silent_
293endif
294
295export quiet Q KBUILD_VERBOSE
296
1da177e4
LT
297
298# Look for make include files relative to root of kernel src
299MAKEFLAGS += --include-dir=$(srctree)
300
1cacc9ab
SR
301# We need some generic definitions (do not try to remake the file).
302$(srctree)/scripts/Kbuild.include: ;
15964864 303include $(srctree)/scripts/Kbuild.include
1da177e4
LT
304
305# Make variables (CC, etc...)
306
307AS = $(CROSS_COMPILE)as
308LD = $(CROSS_COMPILE)ld
309CC = $(CROSS_COMPILE)gcc
310CPP = $(CC) -E
311AR = $(CROSS_COMPILE)ar
312NM = $(CROSS_COMPILE)nm
313STRIP = $(CROSS_COMPILE)strip
314OBJCOPY = $(CROSS_COMPILE)objcopy
315OBJDUMP = $(CROSS_COMPILE)objdump
316AWK = awk
317GENKSYMS = scripts/genksyms/genksyms
318DEPMOD = /sbin/depmod
319KALLSYMS = scripts/kallsyms
320PERL = perl
321CHECK = sparse
322
80a7d1d9
HE
323CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
324 -Wbitwise -Wno-return-void $(CF)
1da177e4
LT
325MODFLAGS = -DMODULE
326CFLAGS_MODULE = $(MODFLAGS)
327AFLAGS_MODULE = $(MODFLAGS)
114f5157 328LDFLAGS_MODULE =
1da177e4
LT
329CFLAGS_KERNEL =
330AFLAGS_KERNEL =
2521f2c2 331CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
1da177e4
LT
332
333
334# Use LINUXINCLUDE when you must reference the include/ directory.
335# Needed to be compatible with the O= option
336LINUXINCLUDE := -Iinclude \
2dd34b48 337 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
5e4786f7
SR
338 -I$(srctree)/arch/$(hdr-arch)/include \
339 -include include/linux/autoconf.h
1da177e4 340
d8672b40 341KBUILD_CPPFLAGS := -D__KERNEL__
1da177e4 342
a0f97e06 343KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
94bed2a9 344 -fno-strict-aliasing -fno-common \
a8735821 345 -Werror-implicit-function-declaration \
a3ca86ae
ET
346 -Wno-format-security \
347 -fno-delete-null-pointer-checks
222d394d 348KBUILD_AFLAGS := -D__ASSEMBLY__
1da177e4 349
f1d28fb0
RZ
350# Read KERNELRELEASE from include/config/kernel.release (if it exists)
351KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
2244cbd8 352KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
cb58455c 353
070b98bf 354export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 355export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
070b98bf
SR
356export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
357export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 358
06c5040c 359export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
2521f2c2 360export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
222d394d 361export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
1da177e4
LT
362
363# When compiling out-of-tree modules, put MODVERDIR in the module
364# tree rather than in the kernel tree. The kernel tree might
365# even be read-only.
366export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
367
1da177e4
LT
368# Files to ignore in find ... statements
369
406119f4
TM
370RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
371export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
372
373# ===========================================================================
374# Rules shared between *config targets and build targets
375
376# Basic helpers built in scripts/
4f193362 377PHONY += scripts_basic
1da177e4
LT
378scripts_basic:
379 $(Q)$(MAKE) $(build)=scripts/basic
380
cd05e6bd
JB
381# To avoid any implicit rule to kick in, define an empty command.
382scripts/basic/%: scripts_basic ;
383
4f193362 384PHONY += outputmakefile
fd5f0cd6
JB
385# outputmakefile generates a Makefile in the output directory, if using a
386# separate output directory. This allows convenient use of make in the
387# output directory.
1da177e4 388outputmakefile:
fd5f0cd6 389ifneq ($(KBUILD_SRC),)
92979997 390 $(Q)ln -fsn $(srctree) source
fd5f0cd6
JB
391 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
392 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
393endif
1da177e4
LT
394
395# To make sure we do not include .config for any of the *config targets
396# catch them early, and hand them over to scripts/kconfig/Makefile
397# It is allowed to specify more targets when calling make, including
398# mixing *config targets and build targets.
070b98bf 399# For example 'make oldconfig all'.
1da177e4
LT
400# Detect when mixed targets is specified, and make a second invocation
401# of make so .config is not included in this case either (for *config).
402
3eb3c740 403no-dot-config-targets := clean mrproper distclean \
c30a02e0 404 cscope TAGS tags help %docs check% \
3eb3c740
RZ
405 include/linux/version.h headers_% \
406 kernelrelease kernelversion
1da177e4
LT
407
408config-targets := 0
409mixed-targets := 0
410dot-config := 1
411
412ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
413 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
414 dot-config := 0
415 endif
416endif
417
418ifeq ($(KBUILD_EXTMOD),)
419 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
420 config-targets := 1
421 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
422 mixed-targets := 1
423 endif
424 endif
425endif
426
427ifeq ($(mixed-targets),1)
428# ===========================================================================
429# We're called with mixed targets (*config and build targets).
430# Handle them one by one.
431
432%:: FORCE
433 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
434
435else
436ifeq ($(config-targets),1)
437# ===========================================================================
438# *config targets only - make sure prerequisites are updated, and descend
439# in scripts/kconfig to make the *config target
440
441# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
442# KBUILD_DEFCONFIG may point out an alternative default configuration
443# used for 'make defconfig'
74b469f2 444include $(srctree)/arch/$(SRCARCH)/Makefile
61bee204 445export KBUILD_DEFCONFIG KBUILD_KCONFIG
1da177e4 446
31110ebb
SR
447config: scripts_basic outputmakefile FORCE
448 $(Q)mkdir -p include/linux include/config
449 $(Q)$(MAKE) $(build)=scripts/kconfig $@
450
451%config: scripts_basic outputmakefile FORCE
c955ccaf 452 $(Q)mkdir -p include/linux include/config
1da177e4
LT
453 $(Q)$(MAKE) $(build)=scripts/kconfig $@
454
455else
456# ===========================================================================
457# Build targets only - this includes vmlinux, arch specific targets, clean
458# targets and others. In general all targets except *config targets.
459
460ifeq ($(KBUILD_EXTMOD),)
461# Additional helpers built in scripts/
462# Carefully list dependencies so we do not try to build scripts twice
070b98bf 463# in parallel
4f193362 464PHONY += scripts
2e3646e5 465scripts: scripts_basic include/config/auto.conf
1da177e4
LT
466 $(Q)$(MAKE) $(build)=$(@)
467
1da177e4
LT
468# Objects we will link into vmlinux / subdirs we need to visit
469init-y := init/
4d2acfbf 470drivers-y := drivers/ sound/ firmware/
1da177e4
LT
471net-y := net/
472libs-y := lib/
473core-y := usr/
474endif # KBUILD_EXTMOD
475
476ifeq ($(dot-config),1)
9ee4e336
SR
477# Read in config
478-include include/config/auto.conf
1da177e4 479
9ee4e336 480ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
481# Read in dependencies to all Kconfig* files, make sure to run
482# oldconfig if changes are detected.
c955ccaf 483-include include/config/auto.conf.cmd
1da177e4 484
1da177e4 485# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 486$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 487
c955ccaf 488# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 489# with it and forgot to run make oldconfig.
070b98bf 490# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 491# we execute the config step to be sure to catch updated Kconfig files
14cdd3c4 492include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 493 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 494else
9ee4e336
SR
495# external modules needs include/linux/autoconf.h and include/config/auto.conf
496# but do not care if they are up-to-date. Use auto.conf to trigger the test
497PHONY += include/config/auto.conf
498
499include/config/auto.conf:
500 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
501 echo; \
502 echo " ERROR: Kernel configuration is invalid."; \
503 echo " include/linux/autoconf.h or $@ are missing."; \
504 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
505 echo; \
506 /bin/false)
507
508endif # KBUILD_EXTMOD
c955ccaf 509
1da177e4
LT
510else
511# Dummy target needed, because used as prerequisite
c955ccaf 512include/config/auto.conf: ;
9ee4e336 513endif # $(dot-config)
1da177e4
LT
514
515# The all: target is the default when no target is given on the
516# command line.
517# This allow a user to issue only 'make' to build a kernel including modules
070b98bf 518# Defaults vmlinux but it is usually overridden in the arch makefile
1da177e4
LT
519all: vmlinux
520
521ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
a0f97e06 522KBUILD_CFLAGS += -Os
1da177e4 523else
a0f97e06 524KBUILD_CFLAGS += -O2
1da177e4
LT
525endif
526
bef5b54b
RB
527include $(srctree)/arch/$(SRCARCH)/Makefile
528
08f67461 529ifneq ($(CONFIG_FRAME_WARN),0)
35bb5b1e
AK
530KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
531endif
532
e06b8b98 533# Force gcc to behave correct even for buggy distributions
5d707e9c 534ifndef CONFIG_CC_STACKPROTECTOR
e06b8b98 535KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
5d707e9c 536endif
e06b8b98 537
1da177e4 538ifdef CONFIG_FRAME_POINTER
a0f97e06 539KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 540else
a0f97e06 541KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4
LT
542endif
543
544ifdef CONFIG_DEBUG_INFO
a0f97e06 545KBUILD_CFLAGS += -g
222d394d 546KBUILD_AFLAGS += -gdwarf-2
1da177e4
LT
547endif
548
606576ce 549ifdef CONFIG_FUNCTION_TRACER
16444a8a
ACM
550KBUILD_CFLAGS += -pg
551endif
552
91341d4b
SR
553# We trigger additional mismatches with less inlining
554ifdef CONFIG_DEBUG_SECTION_MISMATCH
555KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
556endif
557
e8e69931 558# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 559NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
560CHECKFLAGS += $(NOSTDINC_FLAGS)
561
1da177e4 562# warn about C99 declaration after statement
a0f97e06 563KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 564
070b98bf 565# disable pointer signed / unsigned warnings in gcc 4.0
a0f97e06 566KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
1da177e4 567
fe8d0a41 568# disable invalid "can't wrap" optimizations for signed / pointers
a137802e 569KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
d0115552 570
00308649
KM
571# revert to pre-gcc-4.4 behaviour of .eh_frame
572KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
573
06c5040c 574# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
69ee0b35
SR
575# But warn user when we do so
576warn-assign = \
577$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
578
579ifneq ($(KCPPFLAGS),)
580 $(call warn-assign,CPPFLAGS)
581 KBUILD_CPPFLAGS += $(KCPPFLAGS)
582endif
583ifneq ($(KAFLAGS),)
584 $(call warn-assign,AFLAGS)
585 KBUILD_AFLAGS += $(KAFLAGS)
586endif
587ifneq ($(KCFLAGS),)
588 $(call warn-assign,CFLAGS)
589 KBUILD_CFLAGS += $(KCFLAGS)
590endif
52bcc330 591
18991197
RM
592# Use --build-id when available.
593LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
594 $(call ld-option, -Wl$(comma)--build-id,))
595LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
596LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
597
5d7d18f5
DH
598ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
599LDFLAGS_vmlinux += -X
600endif
601
1da177e4 602# Default kernel image to build when no specific target is given.
070b98bf 603# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
604# set in the environment
605# Also any assignments in arch/$(ARCH)/Makefile take precedence over
606# this default value
607export KBUILD_IMAGE ?= vmlinux
608
609#
610# INSTALL_PATH specifies where to place the updated kernel and system map
611# images. Default is /boot, but you can set it to other values
612export INSTALL_PATH ?= /boot
613
614#
615# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
616# relocations required by build roots. This is not defined in the
070b98bf 617# makefile but the argument can be passed to make if needed.
1da177e4
LT
618#
619
df9df036 620MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
621export MODLIB
622
ac031f26 623#
2ea03891
SR
624# INSTALL_MOD_STRIP, if defined, will cause modules to be
625# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
626# the default option --strip-debug will be used. Otherwise,
627# INSTALL_MOD_STRIP will used as the options to the strip command.
628
ac031f26
TT
629ifdef INSTALL_MOD_STRIP
630ifeq ($(INSTALL_MOD_STRIP),1)
2ea03891 631mod_strip_cmd = $(STRIP) --strip-debug
ac031f26 632else
2ea03891 633mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
ac031f26
TT
634endif # INSTALL_MOD_STRIP=1
635else
2ea03891 636mod_strip_cmd = true
ac031f26
TT
637endif # INSTALL_MOD_STRIP
638export mod_strip_cmd
639
1da177e4
LT
640
641ifeq ($(KBUILD_EXTMOD),)
3a65dfe8 642core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
643
644vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
645 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
646 $(net-y) $(net-m) $(libs-y) $(libs-m)))
647
648vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
649 $(init-n) $(init-) \
650 $(core-n) $(core-) $(drivers-n) $(drivers-) \
651 $(net-n) $(net-) $(libs-n) $(libs-))))
652
653init-y := $(patsubst %/, %/built-in.o, $(init-y))
654core-y := $(patsubst %/, %/built-in.o, $(core-y))
655drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
656net-y := $(patsubst %/, %/built-in.o, $(net-y))
657libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
658libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
659libs-y := $(libs-y1) $(libs-y2)
660
661# Build vmlinux
662# ---------------------------------------------------------------------------
070b98bf 663# vmlinux is built from the objects selected by $(vmlinux-init) and
1da177e4 664# $(vmlinux-main). Most are built-in.o files from top-level directories
2462566f 665# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
1da177e4
LT
666# Ordering when linking is important, and $(vmlinux-init) must be first.
667#
668# vmlinux
669# ^
670# |
671# +-< $(vmlinux-init)
672# | +--< init/version.o + more
673# |
674# +--< $(vmlinux-main)
675# | +--< driver/built-in.o mm/built-in.o + more
676# |
677# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
678#
679# vmlinux version (uname -v) cannot be updated during normal
680# descending-into-subdirs phase since we do not yet know if we need to
681# update vmlinux.
682# Therefore this step is delayed until just before final link of vmlinux -
683# except in the kallsyms case where it is done just before adding the
684# symbols to the kernel.
685#
686# System.map is generated to document addresses of all kernel symbols
687
688vmlinux-init := $(head-y) $(init-y)
689vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
690vmlinux-all := $(vmlinux-init) $(vmlinux-main)
6752ed90 691vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
85bd2fdd 692export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
1da177e4
LT
693
694# Rule to link vmlinux - also used during CONFIG_KALLSYMS
695# May be overridden by arch/$(ARCH)/Makefile
696quiet_cmd_vmlinux__ ?= LD $@
697 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
698 -T $(vmlinux-lds) $(vmlinux-init) \
699 --start-group $(vmlinux-main) --end-group \
741f98fe 700 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
1da177e4
LT
701
702# Generate new vmlinux version
703quiet_cmd_vmlinux_version = GEN .version
704 cmd_vmlinux_version = set -e; \
4e25d8bb
JB
705 if [ ! -r .version ]; then \
706 rm -f .version; \
707 echo 1 >.version; \
708 else \
709 mv .version .old_version; \
710 expr 0$$(cat .old_version) + 1 >.version; \
711 fi; \
1da177e4
LT
712 $(MAKE) $(build)=init
713
714# Generate System.map
070b98bf 715quiet_cmd_sysmap = SYSMAP
1da177e4
LT
716 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
717
718# Link of vmlinux
719# If CONFIG_KALLSYMS is set .version is already updated
720# Generate System.map and verify that the content is consistent
39ca371c
MR
721# Use + in front of the vmlinux_version rule to silent warning with make -j2
722# First command is ':' to allow us to use + in front of the rule
1da177e4 723define rule_vmlinux__
39ca371c 724 :
1da177e4
LT
725 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
726
727 $(call cmd,vmlinux__)
728 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
729
4635281c
SR
730 $(Q)$(if $($(quiet)cmd_sysmap), \
731 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
732 $(cmd_sysmap) $@ System.map; \
733 if [ $$? -ne 0 ]; then \
734 rm -f $@; \
735 /bin/false; \
1da177e4
LT
736 fi;
737 $(verify_kallsyms)
738endef
739
740
741ifdef CONFIG_KALLSYMS
742# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
743# It's a three stage process:
744# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
745# empty
746# Running kallsyms on that gives us .tmp_kallsyms1.o with
747# the right size - vmlinux version (uname -v) is updated during this step
748# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
749# but due to the added section, some addresses have shifted.
750# From here, we generate a correct .tmp_kallsyms2.o
751# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
752# o Verify that the System.map from vmlinux matches the map from
753# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
754# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
755# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
756# temporary bypass to allow the kernel to be built while the
757# maintainers work out what went wrong with kallsyms.
758
759ifdef CONFIG_KALLSYMS_EXTRA_PASS
760last_kallsyms := 3
761else
762last_kallsyms := 2
763endif
764
765kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
766
767define verify_kallsyms
4635281c
SR
768 $(Q)$(if $($(quiet)cmd_sysmap), \
769 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
1da177e4 770 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
4635281c
SR
771 $(Q)cmp -s System.map .tmp_System.map || \
772 (echo Inconsistent kallsyms data; \
773 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
1da177e4
LT
774 rm .tmp_kallsyms* ; /bin/false )
775endef
776
777# Update vmlinux version before link
778# Use + in front of this rule to silent warning about make -j1
72ba47c1 779# First command is ':' to allow us to use + in front of this rule
1da177e4
LT
780cmd_ksym_ld = $(cmd_vmlinux__)
781define rule_ksym_ld
72ba47c1 782 :
1da177e4
LT
783 +$(call cmd,vmlinux_version)
784 $(call cmd,vmlinux__)
785 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
786endef
787
788# Generate .S file with all kernel symbols
789quiet_cmd_kallsyms = KSYM $@
2ea03891
SR
790 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
791 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
9bb48247 792
2ea03891 793.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
1da177e4
LT
794 $(call if_changed_dep,as_o_S)
795
2ea03891 796.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
1da177e4
LT
797 $(call cmd,kallsyms)
798
799# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
2ea03891
SR
800.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
801 $(call if_changed_rule,ksym_ld)
1da177e4 802
2ea03891
SR
803.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
804 $(call if_changed,vmlinux__)
1da177e4 805
2ea03891
SR
806.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
807 $(call if_changed,vmlinux__)
1da177e4
LT
808
809# Needs to visit scripts/ before $(KALLSYMS) can be used.
810$(KALLSYMS): scripts ;
811
33bc25ea
SR
812# Generate some data for debugging strange kallsyms problems
813debug_kallsyms: .tmp_map$(last_kallsyms)
814
815.tmp_map%: .tmp_vmlinux% FORCE
816 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
817
818.tmp_map3: .tmp_map2
819
820.tmp_map2: .tmp_map1
821
1da177e4
LT
822endif # ifdef CONFIG_KALLSYMS
823
741f98fe
SR
824# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
825# relevant sections renamed as per the linker script.
826quiet_cmd_vmlinux-modpost = LD $@
827 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
828 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
90ebd878 829 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
741f98fe
SR
830define rule_vmlinux-modpost
831 :
832 +$(call cmd,vmlinux-modpost)
833 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
834 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
835endef
836
1da177e4 837# vmlinux image - including updated kernel symbols
310f8243 838vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
0f836e5f 839ifdef CONFIG_HEADERS_CHECK
0e7af8d0 840 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025
MD
841endif
842ifdef CONFIG_SAMPLES
843 $(Q)$(MAKE) $(build)=samples
3794f3e8
RD
844endif
845ifdef CONFIG_BUILD_DOCSRC
846 $(Q)$(MAKE) $(build)=Documentation
0f836e5f 847endif
741f98fe 848 $(call vmlinux-modpost)
1da177e4 849 $(call if_changed_rule,vmlinux__)
4e25d8bb 850 $(Q)rm -f .old_version
1da177e4 851
310f8243 852# build vmlinux.o first to catch section mismatch errors early
cf87dcd1
SR
853ifdef CONFIG_KALLSYMS
854.tmp_vmlinux1: vmlinux.o
855endif
90ebd878
SR
856
857modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
858vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
741f98fe
SR
859 $(call if_changed_rule,vmlinux-modpost)
860
1da177e4
LT
861# The actual objects are generated when descending,
862# make sure no implicit rule kicks in
863$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
864
865# Handle descending into subdirectories listed in $(vmlinux-dirs)
866# Preset locale variables to speed up the build process. Limit locale
867# tweaks to this spot to avoid wrong language settings when running
868# make menuconfig etc.
869# Error messages still appears in the original language
870
4f193362 871PHONY += $(vmlinux-dirs)
5bb78269 872$(vmlinux-dirs): prepare scripts
1da177e4
LT
873 $(Q)$(MAKE) $(build)=$@
874
cb58455c 875# Build the kernel release string
cb58455c 876#
1ef98856
RD
877# The KERNELRELEASE value built here is stored in the file
878# include/config/kernel.release, and is used when executing several
879# make targets, such as "make install" or "make modules_install."
880#
881# The eventual kernel release string consists of the following fields,
882# shown in a hierarchical format to show how smaller parts are concatenated
883# to form the larger and final value, with values coming from places like
884# the Makefile, kernel config options, make command line options and/or
885# SCM tag information.
886#
887# $(KERNELVERSION)
888# $(VERSION) eg, 2
889# $(PATCHLEVEL) eg, 6
890# $(SUBLEVEL) eg, 18
891# $(EXTRAVERSION) eg, -rc6
892# $(localver-full)
893# $(localver)
76c32956 894# localversion* (files without backups, containing '~')
1ef98856
RD
895# $(CONFIG_LOCALVERSION) (from kernel config setting)
896# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
897# ./scripts/setlocalversion (SCM tag, if one exists)
898# $(LOCALVERSION) (from make command line if provided)
899#
900# Note how the final $(localver-auto) string is included *only* if the
901# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
902# moment, only git is supported but other SCMs can edit the script
903# scripts/setlocalversion and add the appropriate checks as needed.
cb58455c 904
76c32956
OV
905pattern = ".*/localversion[^~]*"
906string = $(shell cat /dev/null \
fd19e44f 907 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
cb58455c 908
76c32956
OV
909localver = $(subst $(space),, $(string) \
910 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
070b98bf 911
cb58455c
SR
912# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
913# and if the SCM is know a tag from the SCM is appended.
070b98bf 914# The appended tag is determined by the SCM used.
cb58455c 915#
b925dbfe
JH
916# .scmversion is used when generating rpm packages so we do not loose
917# the version information from the SCM when we do the build of the kernel
918# from the copied source
cb58455c 919ifdef CONFIG_LOCALVERSION_AUTO
b925dbfe
JH
920
921ifeq ($(wildcard .scmversion),)
922 _localver-auto = $(shell $(CONFIG_SHELL) \
923 $(srctree)/scripts/setlocalversion $(srctree))
924else
925 _localver-auto = $(shell cat .scmversion 2> /dev/null)
926endif
927
cb58455c
SR
928 localver-auto = $(LOCALVERSION)$(_localver-auto)
929endif
930
931localver-full = $(localver)$(localver-auto)
932
f1d28fb0 933# Store (new) KERNELRELASE string in include/config/kernel.release
2244cbd8 934kernelrelease = $(KERNELVERSION)$(localver-full)
f1d28fb0 935include/config/kernel.release: include/config/auto.conf FORCE
2244cbd8
SR
936 $(Q)rm -f $@
937 $(Q)echo $(kernelrelease) > $@
cb58455c
SR
938
939
1da177e4 940# Things we need to do before we recursively start building the kernel
5bb78269
SR
941# or the modules are listed in "prepare".
942# A multi level approach is used. prepareN is processed before prepareN-1.
943# archprepare is used in arch Makefiles and when processed asm symlink,
944# version.h and scripts_basic is processed / created.
1da177e4 945
5bb78269 946# Listed in dependency order
4f193362 947PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 948
86feeaa8 949# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
950# and if so do:
951# 1) Check that make has not been executed in the kernel src $(srctree)
952# 2) Create the include2 directory, used for the second asm symlink
f1d28fb0 953prepare3: include/config/kernel.release
1da177e4 954ifneq ($(KBUILD_SRC),)
fd54f502 955 @$(kecho) ' Using $(srctree) as source for kernel'
c955ccaf 956 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1da177e4
LT
957 echo " $(srctree) is not clean, please run 'make mrproper'";\
958 echo " in the '$(srctree)' directory.";\
959 /bin/false; \
960 fi;
7a48bdd0
SR
961 $(Q)if [ ! -d include2 ]; then \
962 mkdir -p include2; \
2e57d051 963 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
7a48bdd0 964 fi
1da177e4
LT
965endif
966
86feeaa8
SR
967# prepare2 creates a makefile if using a separate output directory
968prepare2: prepare3 outputmakefile
1da177e4 969
3eb3c740
RZ
970prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
971 include/asm include/config/auto.conf
7bb9d092 972 $(cmd_crmodverdir)
1da177e4 973
5bb78269
SR
974archprepare: prepare1 scripts_basic
975
976prepare0: archprepare FORCE
8d36a623 977 $(Q)$(MAKE) $(build)=.
c53aeca0 978 $(Q)$(MAKE) $(build)=. missing-syscalls
86feeaa8 979
1da177e4 980# All the preparing..
d395efb5 981prepare: prepare0
1da177e4 982
070b98bf
SR
983# Leave this as default for preprocessing vmlinux.lds.S, which is now
984# done in arch/$(ARCH)/kernel/Makefile
1da177e4
LT
985
986export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
987
fc333b2d
SR
988# The asm symlink changes when $(ARCH) changes.
989# Detect this and ask user to run make mrproper
dcc2da1a 990# If asm is a stale symlink (point to dir that does not exist) remove it
2e57d051
SR
991define check-symlink
992 set -e; \
993 if [ -L include/asm ]; then \
994 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
995 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
fc333b2d
SR
996 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
997 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
2e57d051
SR
998 exit 1; \
999 fi; \
dcc2da1a
SR
1000 test -e $$asmlink || rm include/asm; \
1001 elif [ -d include/asm ]; then \
1002 echo "ERROR: $@ is a directory but a symlink was expected";\
1003 exit 1; \
fc333b2d 1004 fi
2e57d051
SR
1005endef
1006
1007# We create the target directory of the symlink if it does
5a9e67b1 1008# not exist so the test in check-symlink works and we have a
2e57d051
SR
1009# directory for generated filesas used by some architectures.
1010define create-symlink
1011 if [ ! -L include/asm ]; then \
fd54f502 1012 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
2e57d051
SR
1013 if [ ! -d include/asm-$(SRCARCH) ]; then \
1014 mkdir -p include/asm-$(SRCARCH); \
1015 fi; \
1016 ln -fsn asm-$(SRCARCH) $@; \
fc333b2d 1017 fi
2e57d051
SR
1018endef
1019
1020include/asm: FORCE
1021 $(Q)$(check-symlink)
1022 $(Q)$(create-symlink)
1da177e4 1023
1da177e4
LT
1024# Generate some files
1025# ---------------------------------------------------------------------------
1026
1027# KERNELRELEASE can change from a few different places, meaning version.h
1028# needs to be updated, so this check is forced on all builds
1029
1030uts_len := 64
63104eec
SR
1031define filechk_utsrelease.h
1032 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1033 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1034 exit 1; \
1035 fi; \
1036 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1037endef
1da177e4
LT
1038
1039define filechk_version.h
63104eec
SR
1040 (echo \#define LINUX_VERSION_CODE $(shell \
1041 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1042 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
1043endef
1044
63104eec 1045include/linux/version.h: $(srctree)/Makefile FORCE
1da177e4
LT
1046 $(call filechk,version.h)
1047
63104eec
SR
1048include/linux/utsrelease.h: include/config/kernel.release FORCE
1049 $(call filechk,utsrelease.h)
1050
179efcb4
VN
1051PHONY += headerdep
1052headerdep:
1053 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1054
1da177e4
LT
1055# ---------------------------------------------------------------------------
1056
4f193362 1057PHONY += depend dep
1da177e4
LT
1058depend dep:
1059 @echo '*** Warning: make $@ is unnecessary now.'
1060
88ecf814
DW
1061# ---------------------------------------------------------------------------
1062# Firmware install
1063INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1064export INSTALL_FW_PATH
1065
1066PHONY += firmware_install
1067firmware_install: FORCE
1068 @mkdir -p $(objtree)/firmware
1069 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1070
8d730cfb
DW
1071# ---------------------------------------------------------------------------
1072# Kernel headers
8d730cfb 1073
e6883b18
SR
1074#Default location for installed headers
1075export INSTALL_HDR_PATH = $(objtree)/usr
6d716275 1076
e6883b18 1077hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
2fb9b1bd
SR
1078# Find out where the Kbuild file is located to support
1079# arch/$(ARCH)/include/asm
1080hdr-dir = $(strip \
1081 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1082 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1083
1084# If we do an all arch process set dst to asm-$(hdr-arch)
1085hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
e6883b18
SR
1086
1087PHONY += __headers
1088__headers: include/linux/version.h scripts_basic FORCE
398477d4 1089 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
e6883b18
SR
1090
1091PHONY += headers_install_all
2fb9b1bd
SR
1092headers_install_all:
1093 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
6d716275 1094
8d730cfb 1095PHONY += headers_install
e6883b18 1096headers_install: __headers
2fb9b1bd
SR
1097 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1098 $(error Headers not exportable for the $(SRCARCH) architecture))
88181ec3 1099 $(Q)$(MAKE) $(hdr-inst)=include
2fb9b1bd 1100 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
8d730cfb 1101
1f85712e
MF
1102PHONY += headers_check_all
1103headers_check_all: headers_install_all
2fb9b1bd 1104 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1f85712e 1105
68475359
DW
1106PHONY += headers_check
1107headers_check: headers_install
88181ec3 1108 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
2fb9b1bd 1109 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
68475359 1110
1da177e4
LT
1111# ---------------------------------------------------------------------------
1112# Modules
1113
1114ifdef CONFIG_MODULES
1115
070b98bf 1116# By default, build modules as well
1da177e4
LT
1117
1118all: modules
1119
1120# Build modules
551559e1
TH
1121#
1122# A module can be listed more than once in obj-m resulting in
1123# duplicate lines in modules.order files. Those are removed
1124# using awk while concatenating to the final file.
1da177e4 1125
4f193362 1126PHONY += modules
1da177e4 1127modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
551559e1 1128 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
fd54f502 1129 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1130 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
44463f7d 1131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1da177e4
LT
1132
1133
1134# Target to prepare building external modules
4f193362 1135PHONY += modules_prepare
5bb78269 1136modules_prepare: prepare scripts
1da177e4
LT
1137
1138# Target to install modules
4f193362 1139PHONY += modules_install
1da177e4
LT
1140modules_install: _modinst_ _modinst_post
1141
4f193362 1142PHONY += _modinst_
1da177e4 1143_modinst_:
ce454d4d 1144 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1da177e4
LT
1145 echo "Warning: you may need to install module-init-tools"; \
1146 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1147 sleep 1; \
1148 fi
1149 @rm -rf $(MODLIB)/kernel
1150 @rm -f $(MODLIB)/source
1151 @mkdir -p $(MODLIB)/kernel
1152 @ln -s $(srctree) $(MODLIB)/source
1153 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1154 rm -f $(MODLIB)/build ; \
1155 ln -s $(objtree) $(MODLIB)/build ; \
1156 fi
551559e1 1157 @cp -f $(objtree)/modules.order $(MODLIB)/
b805aa0e 1158 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1159
50a8ec31 1160# This depmod is only for convenience to give the initial
1da177e4
LT
1161# boot a modules.dep even before / is mounted read-write. However the
1162# boot script depmod is the master version.
4f193362 1163PHONY += _modinst_post
1da177e4 1164_modinst_post: _modinst_
88ecf814 1165 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
50a8ec31 1166 $(call cmd,depmod)
1da177e4
LT
1167
1168else # CONFIG_MODULES
1169
1170# Modules not configured
1171# ---------------------------------------------------------------------------
1172
1173modules modules_install: FORCE
1174 @echo
1175 @echo "The present kernel configuration has modules disabled."
1176 @echo "Type 'make config' and enable loadable module support."
1177 @echo "Then build a kernel with module support enabled."
1178 @echo
1179 @exit 1
1180
1181endif # CONFIG_MODULES
1182
1da177e4
LT
1183###
1184# Cleaning is done on three levels.
1185# make clean Delete most generated files
1186# Leave enough to build external modules
1187# make mrproper Delete the current configuration, and all generated files
1188# make distclean Remove editor backup files, patch leftover files and the like
1189
1190# Directories & files removed with 'make clean'
1191CLEAN_DIRS += $(MODVERDIR)
1192CLEAN_FILES += vmlinux System.map \
1193 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1194
1195# Directories & files removed with 'make mrproper'
f14875a3 1196MRPROPER_DIRS += include/config include2 usr/include include/generated
50aa88e2 1197MRPROPER_FILES += .config .config.old include/asm .version .old_version \
3eb3c740
RZ
1198 include/linux/autoconf.h include/linux/version.h \
1199 include/linux/utsrelease.h \
7d3cc8b6 1200 include/linux/bounds.h include/asm*/asm-offsets.h \
c28ca3aa 1201 Module.symvers Module.markers tags TAGS cscope*
1da177e4
LT
1202
1203# clean - Delete most, but leave enough to build external modules
1204#
1205clean: rm-dirs := $(CLEAN_DIRS)
1206clean: rm-files := $(CLEAN_FILES)
3794f3e8 1207clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1da177e4 1208
4f193362 1209PHONY += $(clean-dirs) clean archclean
1da177e4
LT
1210$(clean-dirs):
1211 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1212
1213clean: archclean $(clean-dirs)
1214 $(call cmd,rmdirs)
1215 $(call cmd,rmfiles)
1216 @find . $(RCS_FIND_IGNORE) \
070b98bf 1217 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
15fde675 1218 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
d35cb360 1219 -o -name '*.symtypes' -o -name 'modules.order' \
2521f2c2
PO
1220 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
1221 -o -name '*.gcno' \) -type f -print | xargs rm -f
1da177e4
LT
1222
1223# mrproper - Delete all generated files, including .config
1224#
1225mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1226mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1227mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1228
4f193362 1229PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1230$(mrproper-dirs):
1231 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1232
1233mrproper: clean archmrproper $(mrproper-dirs)
1234 $(call cmd,rmdirs)
1235 $(call cmd,rmfiles)
1236
1237# distclean
1238#
4f193362 1239PHONY += distclean
1da177e4
LT
1240
1241distclean: mrproper
1242 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1243 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1244 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
070b98bf 1245 -o -name '.*.rej' -o -size 0 \
1da177e4
LT
1246 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1247 -type f -print | xargs rm -f
1248
1249
1250# Packaging of the kernel to various formats
1251# ---------------------------------------------------------------------------
1252# rpm target kept for backward compatibility
1253package-dir := $(srctree)/scripts/package
1254
031ecc6d 1255%pkg: include/config/kernel.release FORCE
6c2133e1 1256 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1257rpm: include/config/kernel.release FORCE
6c2133e1 1258 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1259
1260
1261# Brief documentation of the typical targets used
1262# ---------------------------------------------------------------------------
1263
5dffbe81 1264boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1da177e4 1265boards := $(notdir $(boards))
5dffbe81
SB
1266board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1267board-dirs := $(sort $(notdir $(board-dirs:/=)))
1da177e4
LT
1268
1269help:
1270 @echo 'Cleaning targets:'
5ea084ef 1271 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1272 @echo ' enough build support to build external modules'
5ea084ef 1273 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1274 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1275 @echo ''
1276 @echo 'Configuration targets:'
1277 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1278 @echo ''
1279 @echo 'Other generic targets:'
1280 @echo ' all - Build all targets marked with [*]'
1281 @echo '* vmlinux - Build the bare kernel'
1282 @echo '* modules - Build all modules'
9cc5d74c 1283 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
88ecf814
DW
1284 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1285 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1da177e4
LT
1286 @echo ' dir/ - Build all files in dir and below'
1287 @echo ' dir/file.[ois] - Build specified target only'
155ad605 1288 @echo ' dir/file.ko - Build module including final link'
c4d5ee67 1289 @echo ' modules_prepare - Set up for building external modules'
1da177e4
LT
1290 @echo ' tags/TAGS - Generate tags file for editors'
1291 @echo ' cscope - Generate cscope index'
6d128842 1292 @echo ' kernelrelease - Output the release version string'
cb58455c 1293 @echo ' kernelversion - Output the version stored in Makefile'
2fb9b1bd 1294 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1295 echo ' (default: $(INSTALL_HDR_PATH))'; \
2fb9b1bd 1296 echo ''
1da177e4 1297 @echo 'Static analysers'
1da177e4
LT
1298 @echo ' checkstack - Generate a list of stack hogs'
1299 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1300 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1301 @echo ' includecheck - Check for duplicate included header files'
295ac051 1302 @echo ' export_report - List the usages of all exported symbols'
179efcb4
VN
1303 @echo ' headers_check - Sanity check on exported headers'
1304 @echo ' headerdep - Detect inclusion cycles in headers'; \
2fb9b1bd 1305 echo ''
1da177e4 1306 @echo 'Kernel packaging:'
6c2133e1 1307 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1308 @echo ''
1309 @echo 'Documentation targets:'
1310 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1311 @echo ''
01dee188 1312 @echo 'Architecture specific targets ($(SRCARCH)):'
1da177e4 1313 @$(if $(archhelp),$(archhelp),\
01dee188 1314 echo ' No architecture specific help defined for $(SRCARCH)')
1da177e4
LT
1315 @echo ''
1316 @$(if $(boards), \
1317 $(foreach b, $(boards), \
1318 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1319 echo '')
5dffbe81
SB
1320 @$(if $(board-dirs), \
1321 $(foreach b, $(board-dirs), \
1322 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1323 printf " %-16s - Show all of the above\\n" help-boards; \
1324 echo '')
1da177e4
LT
1325
1326 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1327 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1328 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1329 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1330 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1da177e4
LT
1331 @echo ''
1332 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1333 @echo 'For further info see the ./README file'
1334
1335
5dffbe81
SB
1336help-board-dirs := $(addprefix help-,$(board-dirs))
1337
1338help-boards: $(help-board-dirs)
1339
1340boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1341
1342$(help-board-dirs): help-%:
1343 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1344 @$(if $(boards-per-dir), \
1345 $(foreach b, $(boards-per-dir), \
1346 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1347 echo '')
1348
1349
1da177e4
LT
1350# Documentation targets
1351# ---------------------------------------------------------------------------
1352%docs: scripts_basic FORCE
1353 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1354
1355else # KBUILD_EXTMOD
1356
1357###
1358# External module support.
1359# When building external modules the kernel used as basis is considered
1360# read-only, and no consistency checks are made and the make
1361# system is not used on the basis kernel. If updates are required
1362# in the basis kernel ordinary make commands (without M=...) must
1363# be used.
1364#
1365# The following are the only valid targets when building external
1366# modules.
1367# make M=dir clean Delete all automatically generated files
1368# make M=dir modules Make all modules in specified dir
1369# make M=dir Same as 'make M=dir modules'
1370# make M=dir modules_install
070b98bf 1371# Install the modules built in the module directory
1da177e4
LT
1372# Assumes install directory is already created
1373
1374# We are always building modules
1375KBUILD_MODULES := 1
4f193362 1376PHONY += crmodverdir
1da177e4 1377crmodverdir:
7bb9d092 1378 $(cmd_crmodverdir)
1da177e4 1379
4f193362 1380PHONY += $(objtree)/Module.symvers
1da177e4
LT
1381$(objtree)/Module.symvers:
1382 @test -e $(objtree)/Module.symvers || ( \
1383 echo; \
1384 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1385 echo " is missing; modules will have no dependencies and modversions."; \
1386 echo )
1387
1388module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1389PHONY += $(module-dirs) modules
1da177e4
LT
1390$(module-dirs): crmodverdir $(objtree)/Module.symvers
1391 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1392
1393modules: $(module-dirs)
fd54f502 1394 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1395 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1396
4f193362 1397PHONY += modules_install
a67dc21a 1398modules_install: _emodinst_ _emodinst_post
e6304663 1399
4f193362
PS
1400install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1401PHONY += _emodinst_
a67dc21a 1402_emodinst_:
a67dc21a 1403 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1404 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1405
4f193362 1406PHONY += _emodinst_post
a67dc21a
SR
1407_emodinst_post: _emodinst_
1408 $(call cmd,depmod)
1409
1da177e4
LT
1410clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1411
4f193362 1412PHONY += $(clean-dirs) clean
1da177e4
LT
1413$(clean-dirs):
1414 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1415
1416clean: rm-dirs := $(MODVERDIR)
0c56042a
FB
1417clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1418 $(KBUILD_EXTMOD)/Module.markers \
1419 $(KBUILD_EXTMOD)/modules.order
1da177e4
LT
1420clean: $(clean-dirs)
1421 $(call cmd,rmdirs)
c34114f4 1422 $(call cmd,rmfiles)
1da177e4 1423 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
070b98bf 1424 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
2521f2c2
PO
1425 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1426 -o -name '*.gcno' \) -type f -print | xargs rm -f
1da177e4
LT
1427
1428help:
1429 @echo ' Building external modules.'
1430 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1431 @echo ''
1432 @echo ' modules - default target, build the module(s)'
1433 @echo ' modules_install - install the module'
1434 @echo ' clean - remove generated files in module directory only'
1435 @echo ''
06300b21
SR
1436
1437# Dummies...
4f193362 1438PHONY += prepare scripts
06300b21
SR
1439prepare: ;
1440scripts: ;
1da177e4
LT
1441endif # KBUILD_EXTMOD
1442
1443# Generate tags for editors
1444# ---------------------------------------------------------------------------
a680eedc
SR
1445quiet_cmd_tags = GEN $@
1446 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1da177e4 1447
a680eedc 1448tags TAGS cscope: FORCE
1da177e4
LT
1449 $(call cmd,tags)
1450
1da177e4
LT
1451# Scripts to check various things for consistency
1452# ---------------------------------------------------------------------------
1453
1da177e4
LT
1454includecheck:
1455 find * $(RCS_FIND_IGNORE) \
1456 -name '*.[hcS]' -type f -print | sort \
80007434 1457 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1458
1459versioncheck:
1460 find * $(RCS_FIND_IGNORE) \
1461 -name '*.[hcS]' -type f -print | sort \
80007434 1462 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1463
1da177e4
LT
1464namespacecheck:
1465 $(PERL) $(srctree)/scripts/namespace.pl
1466
295ac051
AB
1467export_report:
1468 $(PERL) $(srctree)/scripts/export_report.pl
1469
1da177e4
LT
1470endif #ifeq ($(config-targets),1)
1471endif #ifeq ($(mixed-targets),1)
1472
c30a02e0 1473PHONY += checkstack kernelrelease kernelversion
e3ccf6e3 1474
011e3a9a
JD
1475# UML needs a little special treatment here. It wants to use the host
1476# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1477# else wants $(ARCH), including people doing cross-builds, which means
1478# that $(SUBARCH) doesn't work here.
1479ifeq ($(ARCH), um)
1480CHECKSTACK_ARCH := $(SUBARCH)
1481else
1482CHECKSTACK_ARCH := $(ARCH)
1483endif
1da177e4
LT
1484checkstack:
1485 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1486 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4
LT
1487
1488kernelrelease:
f1d28fb0
RZ
1489 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1490 $(error kernelrelease not valid - run 'make prepare' to update it))
cb58455c 1491kernelversion:
2244cbd8 1492 @echo $(KERNELVERSION)
1da177e4 1493
06300b21
SR
1494# Single targets
1495# ---------------------------------------------------------------------------
bc2546a6 1496# Single targets are compatible with:
e1b8513d 1497# - build with mixed source and output
bc2546a6
SR
1498# - build with separate output dir 'make O=...'
1499# - external modules
1500#
1501# target-dir => where to store outputfile
1502# build-dir => directory in kernel source tree to use
1503
1504ifeq ($(KBUILD_EXTMOD),)
aa360879 1505 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1506 target-dir = $(dir $@)
1507else
1508 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1509 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1510 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1511endif
1512
f6ecebd6 1513%.s: %.c prepare scripts FORCE
bc2546a6 1514 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1515%.i: %.c prepare scripts FORCE
bc2546a6 1516 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1517%.o: %.c prepare scripts FORCE
bc2546a6 1518 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1519%.lst: %.c prepare scripts FORCE
bc2546a6 1520 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1521%.s: %.S prepare scripts FORCE
bc2546a6 1522 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1523%.o: %.S prepare scripts FORCE
bc2546a6 1524 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1525%.symtypes: %.c prepare scripts FORCE
1526 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1527
bc2546a6 1528# Modules
31110ebb
SR
1529/: prepare scripts FORCE
1530 $(cmd_crmodverdir)
1531 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1532 $(build)=$(build-dir)
1533%/: prepare scripts FORCE
7bb9d092 1534 $(cmd_crmodverdir)
06300b21 1535 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1536 $(build)=$(build-dir)
1537%.ko: prepare scripts FORCE
7bb9d092 1538 $(cmd_crmodverdir)
06300b21 1539 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1540 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1541 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1542
1da177e4
LT
1543# FIXME Should go into a make.lib or something
1544# ===========================================================================
1545
1546quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1547 cmd_rmdirs = rm -rf $(rm-dirs)
1548
1549quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1550 cmd_rmfiles = rm -f $(rm-files)
1551
bc3c26fe 1552# Run depmod only if we have System.map and depmod is executable
50a8ec31
SR
1553quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1554 cmd_depmod = \
d8d2e78a 1555 if [ -r System.map -a -x $(DEPMOD) ]; then \
50a8ec31 1556 $(DEPMOD) -ae -F System.map \
75bccd88 1557 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
50a8ec31
SR
1558 $(KERNELRELEASE); \
1559 fi
1560
7bb9d092 1561# Create temporary dir for module support files
ab19f879
SR
1562# clean it up only when building all modules
1563cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1564 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1da177e4 1565
222d394d 1566a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
d8672b40 1567 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
5e8d780d 1568 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1da177e4
LT
1569
1570quiet_cmd_as_o_S = AS $@
1571cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1572
1573# read all saved command lines
1574
1575targets := $(wildcard $(sort $(targets)))
1576cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1577
1578ifneq ($(cmd_files),)
1579 $(cmd_files): ; # Do not try to update included dependency files
1580 include $(cmd_files)
1581endif
1582
1da177e4
LT
1583# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1584# Usage:
1585# $(Q)$(MAKE) $(clean)=dir
1586clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1587
1da177e4
LT
1588endif # skip-makefile
1589
4f193362 1590PHONY += FORCE
1da177e4 1591FORCE:
4f193362 1592
4f193362 1593# Declare the contents of the .PHONY variable as phony. We keep that
fe8d0a41 1594# information in a variable so we can use it in if_changed and friends.
4f193362 1595.PHONY: $(PHONY)