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1da177e4
LT
1VERSION = 2
2PATCHLEVEL = 6
17d857be 3SUBLEVEL = 32
22763c5c 4EXTRAVERSION =
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)
2331d1a6
SR
183ARCH ?= $(SUBARCH)
184CROSS_COMPILE ?=
1da177e4
LT
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++
25583d4b 224HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
070b98bf 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
caa27b66 318INSTALLKERNEL := installkernel
1da177e4
LT
319DEPMOD = /sbin/depmod
320KALLSYMS = scripts/kallsyms
321PERL = perl
322CHECK = sparse
323
80a7d1d9
HE
324CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
325 -Wbitwise -Wno-return-void $(CF)
1da177e4
LT
326MODFLAGS = -DMODULE
327CFLAGS_MODULE = $(MODFLAGS)
328AFLAGS_MODULE = $(MODFLAGS)
405d967d 329LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
1da177e4
LT
330CFLAGS_KERNEL =
331AFLAGS_KERNEL =
2521f2c2 332CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
1da177e4
LT
333
334
335# Use LINUXINCLUDE when you must reference the include/ directory.
336# Needed to be compatible with the O= option
337LINUXINCLUDE := -Iinclude \
2dd34b48 338 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
5e4786f7
SR
339 -I$(srctree)/arch/$(hdr-arch)/include \
340 -include include/linux/autoconf.h
1da177e4 341
d8672b40 342KBUILD_CPPFLAGS := -D__KERNEL__
1da177e4 343
a0f97e06 344KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
94bed2a9 345 -fno-strict-aliasing -fno-common \
a8735821 346 -Werror-implicit-function-declaration \
a3ca86ae
ET
347 -Wno-format-security \
348 -fno-delete-null-pointer-checks
222d394d 349KBUILD_AFLAGS := -D__ASSEMBLY__
1da177e4 350
f1d28fb0
RZ
351# Read KERNELRELEASE from include/config/kernel.release (if it exists)
352KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
2244cbd8 353KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
cb58455c 354
070b98bf 355export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 356export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
caa27b66
SR
357export CPP AR NM STRIP OBJCOPY OBJDUMP
358export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
070b98bf 359export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 360
06c5040c 361export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
2521f2c2 362export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
222d394d 363export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
1da177e4
LT
364
365# When compiling out-of-tree modules, put MODVERDIR in the module
366# tree rather than in the kernel tree. The kernel tree might
367# even be read-only.
368export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
369
1da177e4
LT
370# Files to ignore in find ... statements
371
406119f4
TM
372RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
373export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
374
375# ===========================================================================
376# Rules shared between *config targets and build targets
377
378# Basic helpers built in scripts/
4f193362 379PHONY += scripts_basic
1da177e4
LT
380scripts_basic:
381 $(Q)$(MAKE) $(build)=scripts/basic
638adb05 382 $(Q)rm -f .tmp_quiet_recordmcount
1da177e4 383
cd05e6bd
JB
384# To avoid any implicit rule to kick in, define an empty command.
385scripts/basic/%: scripts_basic ;
386
4f193362 387PHONY += outputmakefile
fd5f0cd6
JB
388# outputmakefile generates a Makefile in the output directory, if using a
389# separate output directory. This allows convenient use of make in the
390# output directory.
1da177e4 391outputmakefile:
fd5f0cd6 392ifneq ($(KBUILD_SRC),)
92979997 393 $(Q)ln -fsn $(srctree) source
fd5f0cd6
JB
394 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
395 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
396endif
1da177e4
LT
397
398# To make sure we do not include .config for any of the *config targets
399# catch them early, and hand them over to scripts/kconfig/Makefile
400# It is allowed to specify more targets when calling make, including
401# mixing *config targets and build targets.
070b98bf 402# For example 'make oldconfig all'.
1da177e4
LT
403# Detect when mixed targets is specified, and make a second invocation
404# of make so .config is not included in this case either (for *config).
405
3eb3c740 406no-dot-config-targets := clean mrproper distclean \
c30a02e0 407 cscope TAGS tags help %docs check% \
3eb3c740
RZ
408 include/linux/version.h headers_% \
409 kernelrelease kernelversion
1da177e4
LT
410
411config-targets := 0
412mixed-targets := 0
413dot-config := 1
414
415ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
416 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
417 dot-config := 0
418 endif
419endif
420
421ifeq ($(KBUILD_EXTMOD),)
422 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
423 config-targets := 1
424 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
425 mixed-targets := 1
426 endif
427 endif
428endif
429
430ifeq ($(mixed-targets),1)
431# ===========================================================================
432# We're called with mixed targets (*config and build targets).
433# Handle them one by one.
434
435%:: FORCE
436 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
437
438else
439ifeq ($(config-targets),1)
440# ===========================================================================
441# *config targets only - make sure prerequisites are updated, and descend
442# in scripts/kconfig to make the *config target
443
444# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
445# KBUILD_DEFCONFIG may point out an alternative default configuration
446# used for 'make defconfig'
74b469f2 447include $(srctree)/arch/$(SRCARCH)/Makefile
61bee204 448export KBUILD_DEFCONFIG KBUILD_KCONFIG
1da177e4 449
31110ebb
SR
450config: scripts_basic outputmakefile FORCE
451 $(Q)mkdir -p include/linux include/config
452 $(Q)$(MAKE) $(build)=scripts/kconfig $@
453
454%config: scripts_basic outputmakefile FORCE
c955ccaf 455 $(Q)mkdir -p include/linux include/config
1da177e4
LT
456 $(Q)$(MAKE) $(build)=scripts/kconfig $@
457
458else
459# ===========================================================================
460# Build targets only - this includes vmlinux, arch specific targets, clean
461# targets and others. In general all targets except *config targets.
462
463ifeq ($(KBUILD_EXTMOD),)
464# Additional helpers built in scripts/
465# Carefully list dependencies so we do not try to build scripts twice
070b98bf 466# in parallel
4f193362 467PHONY += scripts
2e3646e5 468scripts: scripts_basic include/config/auto.conf
1da177e4
LT
469 $(Q)$(MAKE) $(build)=$(@)
470
1da177e4
LT
471# Objects we will link into vmlinux / subdirs we need to visit
472init-y := init/
4d2acfbf 473drivers-y := drivers/ sound/ firmware/
1da177e4
LT
474net-y := net/
475libs-y := lib/
476core-y := usr/
477endif # KBUILD_EXTMOD
478
479ifeq ($(dot-config),1)
9ee4e336
SR
480# Read in config
481-include include/config/auto.conf
1da177e4 482
9ee4e336 483ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
484# Read in dependencies to all Kconfig* files, make sure to run
485# oldconfig if changes are detected.
c955ccaf 486-include include/config/auto.conf.cmd
1da177e4 487
1da177e4 488# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 489$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 490
c955ccaf 491# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 492# with it and forgot to run make oldconfig.
070b98bf 493# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 494# we execute the config step to be sure to catch updated Kconfig files
14cdd3c4 495include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 496 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 497else
9ee4e336
SR
498# external modules needs include/linux/autoconf.h and include/config/auto.conf
499# but do not care if they are up-to-date. Use auto.conf to trigger the test
500PHONY += include/config/auto.conf
501
502include/config/auto.conf:
503 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
504 echo; \
505 echo " ERROR: Kernel configuration is invalid."; \
506 echo " include/linux/autoconf.h or $@ are missing."; \
507 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
508 echo; \
509 /bin/false)
510
511endif # KBUILD_EXTMOD
c955ccaf 512
1da177e4
LT
513else
514# Dummy target needed, because used as prerequisite
c955ccaf 515include/config/auto.conf: ;
9ee4e336 516endif # $(dot-config)
1da177e4
LT
517
518# The all: target is the default when no target is given on the
519# command line.
520# This allow a user to issue only 'make' to build a kernel including modules
070b98bf 521# Defaults vmlinux but it is usually overridden in the arch makefile
1da177e4
LT
522all: vmlinux
523
524ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
a0f97e06 525KBUILD_CFLAGS += -Os
1da177e4 526else
a0f97e06 527KBUILD_CFLAGS += -O2
1da177e4
LT
528endif
529
bef5b54b
RB
530include $(srctree)/arch/$(SRCARCH)/Makefile
531
08f67461 532ifneq ($(CONFIG_FRAME_WARN),0)
35bb5b1e
AK
533KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
534endif
535
e06b8b98 536# Force gcc to behave correct even for buggy distributions
5d707e9c 537ifndef CONFIG_CC_STACKPROTECTOR
e06b8b98 538KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
5d707e9c 539endif
e06b8b98 540
1da177e4 541ifdef CONFIG_FRAME_POINTER
a0f97e06 542KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 543else
a0f97e06 544KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4
LT
545endif
546
547ifdef CONFIG_DEBUG_INFO
a0f97e06 548KBUILD_CFLAGS += -g
222d394d 549KBUILD_AFLAGS += -gdwarf-2
1da177e4
LT
550endif
551
606576ce 552ifdef CONFIG_FUNCTION_TRACER
16444a8a
ACM
553KBUILD_CFLAGS += -pg
554endif
555
91341d4b
SR
556# We trigger additional mismatches with less inlining
557ifdef CONFIG_DEBUG_SECTION_MISMATCH
558KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
559endif
560
e8e69931 561# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 562NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
563CHECKFLAGS += $(NOSTDINC_FLAGS)
564
1da177e4 565# warn about C99 declaration after statement
a0f97e06 566KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 567
070b98bf 568# disable pointer signed / unsigned warnings in gcc 4.0
a0f97e06 569KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
1da177e4 570
fe8d0a41 571# disable invalid "can't wrap" optimizations for signed / pointers
a137802e 572KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
d0115552 573
00308649
KM
574# revert to pre-gcc-4.4 behaviour of .eh_frame
575KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
576
8f7f5c9f
AK
577# conserve stack if available
578KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
579
06c5040c 580# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
69ee0b35
SR
581# But warn user when we do so
582warn-assign = \
583$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
584
585ifneq ($(KCPPFLAGS),)
586 $(call warn-assign,CPPFLAGS)
587 KBUILD_CPPFLAGS += $(KCPPFLAGS)
588endif
589ifneq ($(KAFLAGS),)
590 $(call warn-assign,AFLAGS)
591 KBUILD_AFLAGS += $(KAFLAGS)
592endif
593ifneq ($(KCFLAGS),)
594 $(call warn-assign,CFLAGS)
595 KBUILD_CFLAGS += $(KCFLAGS)
596endif
52bcc330 597
18991197
RM
598# Use --build-id when available.
599LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
f86fd306 600 $(call cc-ldoption, -Wl$(comma)--build-id,))
18991197
RM
601LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
602LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
603
5d7d18f5 604ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
d79a2719 605LDFLAGS_vmlinux += $(call ld-option, -X,)
5d7d18f5
DH
606endif
607
1da177e4 608# Default kernel image to build when no specific target is given.
070b98bf 609# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
610# set in the environment
611# Also any assignments in arch/$(ARCH)/Makefile take precedence over
612# this default value
613export KBUILD_IMAGE ?= vmlinux
614
615#
616# INSTALL_PATH specifies where to place the updated kernel and system map
617# images. Default is /boot, but you can set it to other values
618export INSTALL_PATH ?= /boot
619
620#
621# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
622# relocations required by build roots. This is not defined in the
070b98bf 623# makefile but the argument can be passed to make if needed.
1da177e4
LT
624#
625
df9df036 626MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
627export MODLIB
628
ac031f26 629#
2ea03891
SR
630# INSTALL_MOD_STRIP, if defined, will cause modules to be
631# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
632# the default option --strip-debug will be used. Otherwise,
633# INSTALL_MOD_STRIP will used as the options to the strip command.
634
ac031f26
TT
635ifdef INSTALL_MOD_STRIP
636ifeq ($(INSTALL_MOD_STRIP),1)
2ea03891 637mod_strip_cmd = $(STRIP) --strip-debug
ac031f26 638else
2ea03891 639mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
ac031f26
TT
640endif # INSTALL_MOD_STRIP=1
641else
2ea03891 642mod_strip_cmd = true
ac031f26
TT
643endif # INSTALL_MOD_STRIP
644export mod_strip_cmd
645
1da177e4
LT
646
647ifeq ($(KBUILD_EXTMOD),)
3a65dfe8 648core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
649
650vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
651 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
652 $(net-y) $(net-m) $(libs-y) $(libs-m)))
653
654vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
655 $(init-n) $(init-) \
656 $(core-n) $(core-) $(drivers-n) $(drivers-) \
657 $(net-n) $(net-) $(libs-n) $(libs-))))
658
659init-y := $(patsubst %/, %/built-in.o, $(init-y))
660core-y := $(patsubst %/, %/built-in.o, $(core-y))
661drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
662net-y := $(patsubst %/, %/built-in.o, $(net-y))
663libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
664libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
665libs-y := $(libs-y1) $(libs-y2)
666
667# Build vmlinux
668# ---------------------------------------------------------------------------
070b98bf 669# vmlinux is built from the objects selected by $(vmlinux-init) and
1da177e4 670# $(vmlinux-main). Most are built-in.o files from top-level directories
2462566f 671# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
1da177e4
LT
672# Ordering when linking is important, and $(vmlinux-init) must be first.
673#
674# vmlinux
675# ^
676# |
677# +-< $(vmlinux-init)
678# | +--< init/version.o + more
679# |
680# +--< $(vmlinux-main)
681# | +--< driver/built-in.o mm/built-in.o + more
682# |
683# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
684#
685# vmlinux version (uname -v) cannot be updated during normal
686# descending-into-subdirs phase since we do not yet know if we need to
687# update vmlinux.
688# Therefore this step is delayed until just before final link of vmlinux -
689# except in the kallsyms case where it is done just before adding the
690# symbols to the kernel.
691#
692# System.map is generated to document addresses of all kernel symbols
693
694vmlinux-init := $(head-y) $(init-y)
695vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
696vmlinux-all := $(vmlinux-init) $(vmlinux-main)
6752ed90 697vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
85bd2fdd 698export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
1da177e4
LT
699
700# Rule to link vmlinux - also used during CONFIG_KALLSYMS
701# May be overridden by arch/$(ARCH)/Makefile
702quiet_cmd_vmlinux__ ?= LD $@
703 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
704 -T $(vmlinux-lds) $(vmlinux-init) \
705 --start-group $(vmlinux-main) --end-group \
741f98fe 706 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
1da177e4
LT
707
708# Generate new vmlinux version
709quiet_cmd_vmlinux_version = GEN .version
710 cmd_vmlinux_version = set -e; \
4e25d8bb
JB
711 if [ ! -r .version ]; then \
712 rm -f .version; \
713 echo 1 >.version; \
714 else \
715 mv .version .old_version; \
716 expr 0$$(cat .old_version) + 1 >.version; \
717 fi; \
1da177e4
LT
718 $(MAKE) $(build)=init
719
720# Generate System.map
070b98bf 721quiet_cmd_sysmap = SYSMAP
1da177e4
LT
722 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
723
724# Link of vmlinux
725# If CONFIG_KALLSYMS is set .version is already updated
726# Generate System.map and verify that the content is consistent
39ca371c
MR
727# Use + in front of the vmlinux_version rule to silent warning with make -j2
728# First command is ':' to allow us to use + in front of the rule
1da177e4 729define rule_vmlinux__
39ca371c 730 :
1da177e4
LT
731 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
732
733 $(call cmd,vmlinux__)
734 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
735
4635281c
SR
736 $(Q)$(if $($(quiet)cmd_sysmap), \
737 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
738 $(cmd_sysmap) $@ System.map; \
739 if [ $$? -ne 0 ]; then \
740 rm -f $@; \
741 /bin/false; \
1da177e4
LT
742 fi;
743 $(verify_kallsyms)
744endef
745
746
747ifdef CONFIG_KALLSYMS
748# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
749# It's a three stage process:
750# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
751# empty
752# Running kallsyms on that gives us .tmp_kallsyms1.o with
753# the right size - vmlinux version (uname -v) is updated during this step
754# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
755# but due to the added section, some addresses have shifted.
756# From here, we generate a correct .tmp_kallsyms2.o
757# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
758# o Verify that the System.map from vmlinux matches the map from
759# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
760# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
761# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
762# temporary bypass to allow the kernel to be built while the
763# maintainers work out what went wrong with kallsyms.
764
765ifdef CONFIG_KALLSYMS_EXTRA_PASS
766last_kallsyms := 3
767else
768last_kallsyms := 2
769endif
770
771kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
772
773define verify_kallsyms
4635281c
SR
774 $(Q)$(if $($(quiet)cmd_sysmap), \
775 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
1da177e4 776 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
4635281c
SR
777 $(Q)cmp -s System.map .tmp_System.map || \
778 (echo Inconsistent kallsyms data; \
779 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
1da177e4
LT
780 rm .tmp_kallsyms* ; /bin/false )
781endef
782
783# Update vmlinux version before link
784# Use + in front of this rule to silent warning about make -j1
72ba47c1 785# First command is ':' to allow us to use + in front of this rule
1da177e4
LT
786cmd_ksym_ld = $(cmd_vmlinux__)
787define rule_ksym_ld
72ba47c1 788 :
1da177e4
LT
789 +$(call cmd,vmlinux_version)
790 $(call cmd,vmlinux__)
791 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
792endef
793
794# Generate .S file with all kernel symbols
795quiet_cmd_kallsyms = KSYM $@
2ea03891
SR
796 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
797 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
9bb48247 798
2ea03891 799.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
1da177e4
LT
800 $(call if_changed_dep,as_o_S)
801
2ea03891 802.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
1da177e4
LT
803 $(call cmd,kallsyms)
804
805# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
2ea03891
SR
806.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
807 $(call if_changed_rule,ksym_ld)
1da177e4 808
2ea03891
SR
809.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
810 $(call if_changed,vmlinux__)
1da177e4 811
2ea03891
SR
812.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
813 $(call if_changed,vmlinux__)
1da177e4
LT
814
815# Needs to visit scripts/ before $(KALLSYMS) can be used.
816$(KALLSYMS): scripts ;
817
33bc25ea
SR
818# Generate some data for debugging strange kallsyms problems
819debug_kallsyms: .tmp_map$(last_kallsyms)
820
821.tmp_map%: .tmp_vmlinux% FORCE
822 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
823
824.tmp_map3: .tmp_map2
825
826.tmp_map2: .tmp_map1
827
1da177e4
LT
828endif # ifdef CONFIG_KALLSYMS
829
741f98fe
SR
830# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
831# relevant sections renamed as per the linker script.
832quiet_cmd_vmlinux-modpost = LD $@
833 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
834 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
90ebd878 835 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
741f98fe
SR
836define rule_vmlinux-modpost
837 :
838 +$(call cmd,vmlinux-modpost)
839 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
840 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
841endef
842
1da177e4 843# vmlinux image - including updated kernel symbols
310f8243 844vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
0f836e5f 845ifdef CONFIG_HEADERS_CHECK
0e7af8d0 846 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025
MD
847endif
848ifdef CONFIG_SAMPLES
849 $(Q)$(MAKE) $(build)=samples
3794f3e8
RD
850endif
851ifdef CONFIG_BUILD_DOCSRC
852 $(Q)$(MAKE) $(build)=Documentation
0f836e5f 853endif
741f98fe 854 $(call vmlinux-modpost)
1da177e4 855 $(call if_changed_rule,vmlinux__)
4e25d8bb 856 $(Q)rm -f .old_version
1da177e4 857
310f8243 858# build vmlinux.o first to catch section mismatch errors early
cf87dcd1
SR
859ifdef CONFIG_KALLSYMS
860.tmp_vmlinux1: vmlinux.o
861endif
90ebd878
SR
862
863modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
864vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
741f98fe
SR
865 $(call if_changed_rule,vmlinux-modpost)
866
1da177e4
LT
867# The actual objects are generated when descending,
868# make sure no implicit rule kicks in
869$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
870
871# Handle descending into subdirectories listed in $(vmlinux-dirs)
872# Preset locale variables to speed up the build process. Limit locale
873# tweaks to this spot to avoid wrong language settings when running
874# make menuconfig etc.
875# Error messages still appears in the original language
876
4f193362 877PHONY += $(vmlinux-dirs)
5bb78269 878$(vmlinux-dirs): prepare scripts
1da177e4
LT
879 $(Q)$(MAKE) $(build)=$@
880
cb58455c 881# Build the kernel release string
cb58455c 882#
1ef98856
RD
883# The KERNELRELEASE value built here is stored in the file
884# include/config/kernel.release, and is used when executing several
885# make targets, such as "make install" or "make modules_install."
886#
887# The eventual kernel release string consists of the following fields,
888# shown in a hierarchical format to show how smaller parts are concatenated
889# to form the larger and final value, with values coming from places like
890# the Makefile, kernel config options, make command line options and/or
891# SCM tag information.
892#
893# $(KERNELVERSION)
894# $(VERSION) eg, 2
895# $(PATCHLEVEL) eg, 6
896# $(SUBLEVEL) eg, 18
897# $(EXTRAVERSION) eg, -rc6
898# $(localver-full)
899# $(localver)
76c32956 900# localversion* (files without backups, containing '~')
1ef98856
RD
901# $(CONFIG_LOCALVERSION) (from kernel config setting)
902# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
903# ./scripts/setlocalversion (SCM tag, if one exists)
904# $(LOCALVERSION) (from make command line if provided)
905#
906# Note how the final $(localver-auto) string is included *only* if the
907# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
908# moment, only git is supported but other SCMs can edit the script
909# scripts/setlocalversion and add the appropriate checks as needed.
cb58455c 910
76c32956
OV
911pattern = ".*/localversion[^~]*"
912string = $(shell cat /dev/null \
fd19e44f 913 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
cb58455c 914
76c32956
OV
915localver = $(subst $(space),, $(string) \
916 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
070b98bf 917
cb58455c
SR
918# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
919# and if the SCM is know a tag from the SCM is appended.
070b98bf 920# The appended tag is determined by the SCM used.
cb58455c 921#
b925dbfe
JH
922# .scmversion is used when generating rpm packages so we do not loose
923# the version information from the SCM when we do the build of the kernel
924# from the copied source
cb58455c 925ifdef CONFIG_LOCALVERSION_AUTO
b925dbfe
JH
926
927ifeq ($(wildcard .scmversion),)
928 _localver-auto = $(shell $(CONFIG_SHELL) \
929 $(srctree)/scripts/setlocalversion $(srctree))
930else
931 _localver-auto = $(shell cat .scmversion 2> /dev/null)
932endif
933
cb58455c
SR
934 localver-auto = $(LOCALVERSION)$(_localver-auto)
935endif
936
937localver-full = $(localver)$(localver-auto)
938
f1d28fb0 939# Store (new) KERNELRELASE string in include/config/kernel.release
2244cbd8 940kernelrelease = $(KERNELVERSION)$(localver-full)
f1d28fb0 941include/config/kernel.release: include/config/auto.conf FORCE
2244cbd8
SR
942 $(Q)rm -f $@
943 $(Q)echo $(kernelrelease) > $@
cb58455c
SR
944
945
1da177e4 946# Things we need to do before we recursively start building the kernel
5bb78269
SR
947# or the modules are listed in "prepare".
948# A multi level approach is used. prepareN is processed before prepareN-1.
949# archprepare is used in arch Makefiles and when processed asm symlink,
950# version.h and scripts_basic is processed / created.
1da177e4 951
5bb78269 952# Listed in dependency order
4f193362 953PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 954
86feeaa8 955# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
956# and if so do:
957# 1) Check that make has not been executed in the kernel src $(srctree)
958# 2) Create the include2 directory, used for the second asm symlink
f1d28fb0 959prepare3: include/config/kernel.release
1da177e4 960ifneq ($(KBUILD_SRC),)
fd54f502 961 @$(kecho) ' Using $(srctree) as source for kernel'
c955ccaf 962 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1da177e4
LT
963 echo " $(srctree) is not clean, please run 'make mrproper'";\
964 echo " in the '$(srctree)' directory.";\
965 /bin/false; \
966 fi;
7a48bdd0
SR
967 $(Q)if [ ! -d include2 ]; then \
968 mkdir -p include2; \
2e57d051 969 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
7a48bdd0 970 fi
1da177e4
LT
971endif
972
86feeaa8
SR
973# prepare2 creates a makefile if using a separate output directory
974prepare2: prepare3 outputmakefile
1da177e4 975
3eb3c740
RZ
976prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
977 include/asm include/config/auto.conf
7bb9d092 978 $(cmd_crmodverdir)
1da177e4 979
5bb78269
SR
980archprepare: prepare1 scripts_basic
981
982prepare0: archprepare FORCE
8d36a623 983 $(Q)$(MAKE) $(build)=.
c53aeca0 984 $(Q)$(MAKE) $(build)=. missing-syscalls
86feeaa8 985
1da177e4 986# All the preparing..
d395efb5 987prepare: prepare0
1da177e4 988
fc333b2d
SR
989# The asm symlink changes when $(ARCH) changes.
990# Detect this and ask user to run make mrproper
dcc2da1a 991# If asm is a stale symlink (point to dir that does not exist) remove it
2e57d051
SR
992define check-symlink
993 set -e; \
994 if [ -L include/asm ]; then \
995 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
996 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
fc333b2d
SR
997 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
998 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
2e57d051
SR
999 exit 1; \
1000 fi; \
dcc2da1a
SR
1001 test -e $$asmlink || rm include/asm; \
1002 elif [ -d include/asm ]; then \
1003 echo "ERROR: $@ is a directory but a symlink was expected";\
1004 exit 1; \
fc333b2d 1005 fi
2e57d051
SR
1006endef
1007
1008# We create the target directory of the symlink if it does
5a9e67b1 1009# not exist so the test in check-symlink works and we have a
2e57d051
SR
1010# directory for generated filesas used by some architectures.
1011define create-symlink
1012 if [ ! -L include/asm ]; then \
fd54f502 1013 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
2e57d051
SR
1014 if [ ! -d include/asm-$(SRCARCH) ]; then \
1015 mkdir -p include/asm-$(SRCARCH); \
1016 fi; \
1017 ln -fsn asm-$(SRCARCH) $@; \
fc333b2d 1018 fi
2e57d051
SR
1019endef
1020
1021include/asm: FORCE
1022 $(Q)$(check-symlink)
1023 $(Q)$(create-symlink)
1da177e4 1024
1da177e4
LT
1025# Generate some files
1026# ---------------------------------------------------------------------------
1027
1028# KERNELRELEASE can change from a few different places, meaning version.h
1029# needs to be updated, so this check is forced on all builds
1030
1031uts_len := 64
63104eec
SR
1032define filechk_utsrelease.h
1033 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1034 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1035 exit 1; \
1036 fi; \
1037 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1038endef
1da177e4
LT
1039
1040define filechk_version.h
63104eec
SR
1041 (echo \#define LINUX_VERSION_CODE $(shell \
1042 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1043 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
1044endef
1045
63104eec 1046include/linux/version.h: $(srctree)/Makefile FORCE
1da177e4
LT
1047 $(call filechk,version.h)
1048
63104eec
SR
1049include/linux/utsrelease.h: include/config/kernel.release FORCE
1050 $(call filechk,utsrelease.h)
1051
179efcb4
VN
1052PHONY += headerdep
1053headerdep:
1054 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1055
1da177e4
LT
1056# ---------------------------------------------------------------------------
1057
4f193362 1058PHONY += depend dep
1da177e4
LT
1059depend dep:
1060 @echo '*** Warning: make $@ is unnecessary now.'
1061
88ecf814
DW
1062# ---------------------------------------------------------------------------
1063# Firmware install
1064INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1065export INSTALL_FW_PATH
1066
1067PHONY += firmware_install
1068firmware_install: FORCE
1069 @mkdir -p $(objtree)/firmware
1070 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1071
8d730cfb
DW
1072# ---------------------------------------------------------------------------
1073# Kernel headers
8d730cfb 1074
e6883b18
SR
1075#Default location for installed headers
1076export INSTALL_HDR_PATH = $(objtree)/usr
6d716275 1077
e6883b18 1078hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
2fb9b1bd
SR
1079# Find out where the Kbuild file is located to support
1080# arch/$(ARCH)/include/asm
1081hdr-dir = $(strip \
1082 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1083 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1084
1085# If we do an all arch process set dst to asm-$(hdr-arch)
1086hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
e6883b18
SR
1087
1088PHONY += __headers
1089__headers: include/linux/version.h scripts_basic FORCE
398477d4 1090 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
e6883b18
SR
1091
1092PHONY += headers_install_all
2fb9b1bd
SR
1093headers_install_all:
1094 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
6d716275 1095
8d730cfb 1096PHONY += headers_install
e6883b18 1097headers_install: __headers
2fb9b1bd
SR
1098 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1099 $(error Headers not exportable for the $(SRCARCH) architecture))
88181ec3 1100 $(Q)$(MAKE) $(hdr-inst)=include
2fb9b1bd 1101 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
8d730cfb 1102
1f85712e
MF
1103PHONY += headers_check_all
1104headers_check_all: headers_install_all
2fb9b1bd 1105 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1f85712e 1106
68475359
DW
1107PHONY += headers_check
1108headers_check: headers_install
88181ec3 1109 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
2fb9b1bd 1110 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
68475359 1111
1da177e4
LT
1112# ---------------------------------------------------------------------------
1113# Modules
1114
1115ifdef CONFIG_MODULES
1116
070b98bf 1117# By default, build modules as well
1da177e4
LT
1118
1119all: modules
1120
1121# Build modules
551559e1
TH
1122#
1123# A module can be listed more than once in obj-m resulting in
1124# duplicate lines in modules.order files. Those are removed
1125# using awk while concatenating to the final file.
1da177e4 1126
4f193362 1127PHONY += modules
1da177e4 1128modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
551559e1 1129 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
fd54f502 1130 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
44463f7d 1132 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1da177e4
LT
1133
1134
1135# Target to prepare building external modules
4f193362 1136PHONY += modules_prepare
5bb78269 1137modules_prepare: prepare scripts
1da177e4
LT
1138
1139# Target to install modules
4f193362 1140PHONY += modules_install
1da177e4
LT
1141modules_install: _modinst_ _modinst_post
1142
4f193362 1143PHONY += _modinst_
1da177e4 1144_modinst_:
ce454d4d 1145 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1da177e4
LT
1146 echo "Warning: you may need to install module-init-tools"; \
1147 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1148 sleep 1; \
1149 fi
1150 @rm -rf $(MODLIB)/kernel
1151 @rm -f $(MODLIB)/source
1152 @mkdir -p $(MODLIB)/kernel
1153 @ln -s $(srctree) $(MODLIB)/source
1154 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1155 rm -f $(MODLIB)/build ; \
1156 ln -s $(objtree) $(MODLIB)/build ; \
1157 fi
551559e1 1158 @cp -f $(objtree)/modules.order $(MODLIB)/
b805aa0e 1159 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1160
50a8ec31 1161# This depmod is only for convenience to give the initial
1da177e4
LT
1162# boot a modules.dep even before / is mounted read-write. However the
1163# boot script depmod is the master version.
4f193362 1164PHONY += _modinst_post
1da177e4 1165_modinst_post: _modinst_
88ecf814 1166 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
50a8ec31 1167 $(call cmd,depmod)
1da177e4
LT
1168
1169else # CONFIG_MODULES
1170
1171# Modules not configured
1172# ---------------------------------------------------------------------------
1173
1174modules modules_install: FORCE
1175 @echo
1176 @echo "The present kernel configuration has modules disabled."
1177 @echo "Type 'make config' and enable loadable module support."
1178 @echo "Then build a kernel with module support enabled."
1179 @echo
1180 @exit 1
1181
1182endif # CONFIG_MODULES
1183
1da177e4
LT
1184###
1185# Cleaning is done on three levels.
1186# make clean Delete most generated files
1187# Leave enough to build external modules
1188# make mrproper Delete the current configuration, and all generated files
1189# make distclean Remove editor backup files, patch leftover files and the like
1190
1191# Directories & files removed with 'make clean'
1192CLEAN_DIRS += $(MODVERDIR)
1193CLEAN_FILES += vmlinux System.map \
1194 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1195
1196# Directories & files removed with 'make mrproper'
f14875a3 1197MRPROPER_DIRS += include/config include2 usr/include include/generated
50aa88e2 1198MRPROPER_FILES += .config .config.old include/asm .version .old_version \
3eb3c740
RZ
1199 include/linux/autoconf.h include/linux/version.h \
1200 include/linux/utsrelease.h \
7d3cc8b6 1201 include/linux/bounds.h include/asm*/asm-offsets.h \
c28ca3aa 1202 Module.symvers Module.markers tags TAGS cscope*
1da177e4
LT
1203
1204# clean - Delete most, but leave enough to build external modules
1205#
1206clean: rm-dirs := $(CLEAN_DIRS)
1207clean: rm-files := $(CLEAN_FILES)
3794f3e8 1208clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1da177e4 1209
4f193362 1210PHONY += $(clean-dirs) clean archclean
1da177e4
LT
1211$(clean-dirs):
1212 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1213
1214clean: archclean $(clean-dirs)
1215 $(call cmd,rmdirs)
1216 $(call cmd,rmfiles)
1217 @find . $(RCS_FIND_IGNORE) \
070b98bf 1218 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
15fde675 1219 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
d35cb360 1220 -o -name '*.symtypes' -o -name 'modules.order' \
2521f2c2
PO
1221 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
1222 -o -name '*.gcno' \) -type f -print | xargs rm -f
1da177e4
LT
1223
1224# mrproper - Delete all generated files, including .config
1225#
1226mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1227mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1228mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1229
4f193362 1230PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1231$(mrproper-dirs):
1232 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1233
1234mrproper: clean archmrproper $(mrproper-dirs)
1235 $(call cmd,rmdirs)
1236 $(call cmd,rmfiles)
1237
1238# distclean
1239#
4f193362 1240PHONY += distclean
1da177e4
LT
1241
1242distclean: mrproper
1243 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1244 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1245 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
070b98bf 1246 -o -name '.*.rej' -o -size 0 \
1da177e4
LT
1247 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1248 -type f -print | xargs rm -f
1249
1250
1251# Packaging of the kernel to various formats
1252# ---------------------------------------------------------------------------
1253# rpm target kept for backward compatibility
1254package-dir := $(srctree)/scripts/package
1255
031ecc6d 1256%pkg: include/config/kernel.release FORCE
6c2133e1 1257 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1258rpm: include/config/kernel.release FORCE
6c2133e1 1259 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1260
1261
1262# Brief documentation of the typical targets used
1263# ---------------------------------------------------------------------------
1264
5dffbe81 1265boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1da177e4 1266boards := $(notdir $(boards))
5dffbe81
SB
1267board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1268board-dirs := $(sort $(notdir $(board-dirs:/=)))
1da177e4
LT
1269
1270help:
1271 @echo 'Cleaning targets:'
5ea084ef 1272 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1273 @echo ' enough build support to build external modules'
5ea084ef 1274 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1275 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1276 @echo ''
1277 @echo 'Configuration targets:'
1278 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1279 @echo ''
1280 @echo 'Other generic targets:'
1281 @echo ' all - Build all targets marked with [*]'
1282 @echo '* vmlinux - Build the bare kernel'
1283 @echo '* modules - Build all modules'
9cc5d74c 1284 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
88ecf814
DW
1285 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1286 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1da177e4
LT
1287 @echo ' dir/ - Build all files in dir and below'
1288 @echo ' dir/file.[ois] - Build specified target only'
155ad605 1289 @echo ' dir/file.ko - Build module including final link'
c4d5ee67 1290 @echo ' modules_prepare - Set up for building external modules'
1da177e4
LT
1291 @echo ' tags/TAGS - Generate tags file for editors'
1292 @echo ' cscope - Generate cscope index'
6d128842 1293 @echo ' kernelrelease - Output the release version string'
cb58455c 1294 @echo ' kernelversion - Output the version stored in Makefile'
2fb9b1bd 1295 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1296 echo ' (default: $(INSTALL_HDR_PATH))'; \
2fb9b1bd 1297 echo ''
1da177e4 1298 @echo 'Static analysers'
1da177e4
LT
1299 @echo ' checkstack - Generate a list of stack hogs'
1300 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1301 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1302 @echo ' includecheck - Check for duplicate included header files'
295ac051 1303 @echo ' export_report - List the usages of all exported symbols'
179efcb4
VN
1304 @echo ' headers_check - Sanity check on exported headers'
1305 @echo ' headerdep - Detect inclusion cycles in headers'; \
2fb9b1bd 1306 echo ''
1da177e4 1307 @echo 'Kernel packaging:'
6c2133e1 1308 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1309 @echo ''
1310 @echo 'Documentation targets:'
1311 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1312 @echo ''
01dee188 1313 @echo 'Architecture specific targets ($(SRCARCH)):'
1da177e4 1314 @$(if $(archhelp),$(archhelp),\
01dee188 1315 echo ' No architecture specific help defined for $(SRCARCH)')
1da177e4
LT
1316 @echo ''
1317 @$(if $(boards), \
1318 $(foreach b, $(boards), \
1319 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1320 echo '')
5dffbe81
SB
1321 @$(if $(board-dirs), \
1322 $(foreach b, $(board-dirs), \
1323 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1324 printf " %-16s - Show all of the above\\n" help-boards; \
1325 echo '')
1da177e4
LT
1326
1327 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1328 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1329 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1330 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1331 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1da177e4
LT
1332 @echo ''
1333 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1334 @echo 'For further info see the ./README file'
1335
1336
5dffbe81
SB
1337help-board-dirs := $(addprefix help-,$(board-dirs))
1338
1339help-boards: $(help-board-dirs)
1340
1341boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1342
1343$(help-board-dirs): help-%:
1344 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1345 @$(if $(boards-per-dir), \
1346 $(foreach b, $(boards-per-dir), \
1347 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1348 echo '')
1349
1350
1da177e4
LT
1351# Documentation targets
1352# ---------------------------------------------------------------------------
1353%docs: scripts_basic FORCE
1354 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1355
1356else # KBUILD_EXTMOD
1357
1358###
1359# External module support.
1360# When building external modules the kernel used as basis is considered
1361# read-only, and no consistency checks are made and the make
1362# system is not used on the basis kernel. If updates are required
1363# in the basis kernel ordinary make commands (without M=...) must
1364# be used.
1365#
1366# The following are the only valid targets when building external
1367# modules.
1368# make M=dir clean Delete all automatically generated files
1369# make M=dir modules Make all modules in specified dir
1370# make M=dir Same as 'make M=dir modules'
1371# make M=dir modules_install
070b98bf 1372# Install the modules built in the module directory
1da177e4
LT
1373# Assumes install directory is already created
1374
1375# We are always building modules
1376KBUILD_MODULES := 1
4f193362 1377PHONY += crmodverdir
1da177e4 1378crmodverdir:
7bb9d092 1379 $(cmd_crmodverdir)
1da177e4 1380
4f193362 1381PHONY += $(objtree)/Module.symvers
1da177e4
LT
1382$(objtree)/Module.symvers:
1383 @test -e $(objtree)/Module.symvers || ( \
1384 echo; \
1385 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1386 echo " is missing; modules will have no dependencies and modversions."; \
1387 echo )
1388
1389module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1390PHONY += $(module-dirs) modules
1da177e4
LT
1391$(module-dirs): crmodverdir $(objtree)/Module.symvers
1392 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1393
1394modules: $(module-dirs)
fd54f502 1395 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1396 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1397
4f193362 1398PHONY += modules_install
a67dc21a 1399modules_install: _emodinst_ _emodinst_post
e6304663 1400
4f193362
PS
1401install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1402PHONY += _emodinst_
a67dc21a 1403_emodinst_:
a67dc21a 1404 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1405 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1406
4f193362 1407PHONY += _emodinst_post
a67dc21a
SR
1408_emodinst_post: _emodinst_
1409 $(call cmd,depmod)
1410
1da177e4
LT
1411clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1412
4f193362 1413PHONY += $(clean-dirs) clean
1da177e4
LT
1414$(clean-dirs):
1415 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1416
1417clean: rm-dirs := $(MODVERDIR)
0c56042a
FB
1418clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1419 $(KBUILD_EXTMOD)/Module.markers \
1420 $(KBUILD_EXTMOD)/modules.order
1da177e4
LT
1421clean: $(clean-dirs)
1422 $(call cmd,rmdirs)
c34114f4 1423 $(call cmd,rmfiles)
1da177e4 1424 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
070b98bf 1425 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
2521f2c2
PO
1426 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1427 -o -name '*.gcno' \) -type f -print | xargs rm -f
1da177e4
LT
1428
1429help:
1430 @echo ' Building external modules.'
1431 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1432 @echo ''
1433 @echo ' modules - default target, build the module(s)'
1434 @echo ' modules_install - install the module'
1435 @echo ' clean - remove generated files in module directory only'
1436 @echo ''
06300b21
SR
1437
1438# Dummies...
4f193362 1439PHONY += prepare scripts
06300b21
SR
1440prepare: ;
1441scripts: ;
1da177e4
LT
1442endif # KBUILD_EXTMOD
1443
1444# Generate tags for editors
1445# ---------------------------------------------------------------------------
a680eedc
SR
1446quiet_cmd_tags = GEN $@
1447 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1da177e4 1448
a680eedc 1449tags TAGS cscope: FORCE
1da177e4
LT
1450 $(call cmd,tags)
1451
1da177e4
LT
1452# Scripts to check various things for consistency
1453# ---------------------------------------------------------------------------
1454
1da177e4
LT
1455includecheck:
1456 find * $(RCS_FIND_IGNORE) \
1457 -name '*.[hcS]' -type f -print | sort \
80007434 1458 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1459
1460versioncheck:
1461 find * $(RCS_FIND_IGNORE) \
1462 -name '*.[hcS]' -type f -print | sort \
80007434 1463 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1464
1da177e4
LT
1465namespacecheck:
1466 $(PERL) $(srctree)/scripts/namespace.pl
1467
295ac051
AB
1468export_report:
1469 $(PERL) $(srctree)/scripts/export_report.pl
1470
1da177e4
LT
1471endif #ifeq ($(config-targets),1)
1472endif #ifeq ($(mixed-targets),1)
1473
c30a02e0 1474PHONY += checkstack kernelrelease kernelversion
e3ccf6e3 1475
011e3a9a
JD
1476# UML needs a little special treatment here. It wants to use the host
1477# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1478# else wants $(ARCH), including people doing cross-builds, which means
1479# that $(SUBARCH) doesn't work here.
1480ifeq ($(ARCH), um)
1481CHECKSTACK_ARCH := $(SUBARCH)
1482else
1483CHECKSTACK_ARCH := $(ARCH)
1484endif
1da177e4
LT
1485checkstack:
1486 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1487 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4
LT
1488
1489kernelrelease:
f1d28fb0
RZ
1490 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1491 $(error kernelrelease not valid - run 'make prepare' to update it))
cb58455c 1492kernelversion:
2244cbd8 1493 @echo $(KERNELVERSION)
1da177e4 1494
06300b21
SR
1495# Single targets
1496# ---------------------------------------------------------------------------
bc2546a6 1497# Single targets are compatible with:
e1b8513d 1498# - build with mixed source and output
bc2546a6
SR
1499# - build with separate output dir 'make O=...'
1500# - external modules
1501#
1502# target-dir => where to store outputfile
1503# build-dir => directory in kernel source tree to use
1504
1505ifeq ($(KBUILD_EXTMOD),)
aa360879 1506 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1507 target-dir = $(dir $@)
1508else
1509 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1510 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1511 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1512endif
1513
f6ecebd6 1514%.s: %.c prepare scripts FORCE
bc2546a6 1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1516%.i: %.c prepare scripts FORCE
bc2546a6 1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1518%.o: %.c prepare scripts FORCE
bc2546a6 1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1520%.lst: %.c prepare scripts FORCE
bc2546a6 1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1522%.s: %.S prepare scripts FORCE
bc2546a6 1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1524%.o: %.S prepare scripts FORCE
bc2546a6 1525 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1526%.symtypes: %.c prepare scripts FORCE
1527 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1528
bc2546a6 1529# Modules
31110ebb
SR
1530/: prepare scripts FORCE
1531 $(cmd_crmodverdir)
1532 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1533 $(build)=$(build-dir)
1534%/: prepare scripts FORCE
7bb9d092 1535 $(cmd_crmodverdir)
06300b21 1536 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1537 $(build)=$(build-dir)
1538%.ko: prepare scripts FORCE
7bb9d092 1539 $(cmd_crmodverdir)
06300b21 1540 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1541 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1542 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1543
1da177e4
LT
1544# FIXME Should go into a make.lib or something
1545# ===========================================================================
1546
1547quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1548 cmd_rmdirs = rm -rf $(rm-dirs)
1549
1550quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1551 cmd_rmfiles = rm -f $(rm-files)
1552
bc3c26fe 1553# Run depmod only if we have System.map and depmod is executable
50a8ec31
SR
1554quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1555 cmd_depmod = \
d8d2e78a 1556 if [ -r System.map -a -x $(DEPMOD) ]; then \
50a8ec31 1557 $(DEPMOD) -ae -F System.map \
75bccd88 1558 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
50a8ec31
SR
1559 $(KERNELRELEASE); \
1560 fi
1561
7bb9d092 1562# Create temporary dir for module support files
ab19f879
SR
1563# clean it up only when building all modules
1564cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1565 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1da177e4 1566
222d394d 1567a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
d8672b40 1568 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
5e8d780d 1569 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1da177e4
LT
1570
1571quiet_cmd_as_o_S = AS $@
1572cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1573
1574# read all saved command lines
1575
1576targets := $(wildcard $(sort $(targets)))
1577cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1578
1579ifneq ($(cmd_files),)
1580 $(cmd_files): ; # Do not try to update included dependency files
1581 include $(cmd_files)
1582endif
1583
1da177e4
LT
1584# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1585# Usage:
1586# $(Q)$(MAKE) $(clean)=dir
1587clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1588
1da177e4
LT
1589endif # skip-makefile
1590
4f193362 1591PHONY += FORCE
1da177e4 1592FORCE:
4f193362 1593
4f193362 1594# Declare the contents of the .PHONY variable as phony. We keep that
fe8d0a41 1595# information in a variable so we can use it in if_changed and friends.
4f193362 1596.PHONY: $(PHONY)