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1da177e4
LT
1VERSION = 2
2PATCHLEVEL = 6
c5976504 3SUBLEVEL = 29
8e0ee43b
LT
4EXTRAVERSION =
5NAME = Temporary Tasmanian Devil
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
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16# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
1da177e4
LT
18
19# We are using a recursive build, so we need to do a little thinking
20# to get the ordering right.
21#
22# Most importantly: sub-Makefiles should only ever modify files in
23# their own directory. If in some directory we have a dependency on
24# a file in another dir (which doesn't happen often, but it's often
25# unavoidable when linking the built-in.o targets which finally
26# turn into vmlinux), we will call a sub make in that other dir, and
27# after that we are sure that everything which is in that other dir
28# is now up to date.
29#
30# The only cases where we need to modify files which have global
31# effects are thus separated out and done before the recursive
32# descending is started. They are now explicitly listed as the
33# prepare rule.
34
35# To put more focus on warnings, be less verbose as default
36# Use 'make V=1' to see the full commands
37
38ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42endif
43ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45endif
46
1c7bafe7
RD
47# Call a source code checker (by default, "sparse") as part of the
48# C compilation.
49#
50# Use 'make C=1' to enable checking of only re-compiled files.
51# Use 'make C=2' to enable checking of *all* source files, regardless
52# of whether they are re-compiled or not.
53#
54# See the file "Documentation/sparse.txt" for more details, including
55# where to get the "sparse" utility.
1da177e4
LT
56
57ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61endif
62ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64endif
65
66# Use make M=dir to specify directory of external module to build
67# Old syntax make ... SUBDIRS=$PWD is still supported
68# Setting the environment variable KBUILD_EXTMOD take precedence
69ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71endif
72ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76endif
77
78
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
070b98bf 84#
1da177e4
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85# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(KBUILD_SRC),)
98
99# OK, Make called in directory where kernel src resides
100# Do we want to locate output files in a separate directory?
101ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
4f193362 108PHONY := _all
1da177e4
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109_all:
110
1cacc9ab
SR
111# Cancel implicit rules on top Makefile
112$(CURDIR)/Makefile Makefile: ;
113
1da177e4
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114ifneq ($(KBUILD_OUTPUT),)
115# Invoke a second make in the output directory, passing relevant variables
116# check that the output directory actually exists
117saved-output := $(KBUILD_OUTPUT)
118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
119$(if $(KBUILD_OUTPUT),, \
120 $(error output directory "$(saved-output)" does not exist))
1da177e4 121
0b35786d
MM
122PHONY += $(MAKECMDGOALS) sub-make
123
1cacc9ab 124$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
0b35786d
MM
125 $(Q)@:
126
127sub-make: FORCE
23a45e2c
SR
128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
129 KBUILD_SRC=$(CURDIR) \
0b35786d
MM
130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
131 $(filter-out _all sub-make,$(MAKECMDGOALS))
1da177e4
LT
132
133# Leave processing to above invocation of make
134skip-makefile := 1
135endif # ifneq ($(KBUILD_OUTPUT),)
136endif # ifeq ($(KBUILD_SRC),)
137
138# We process the rest of the Makefile if this is the final invocation of make
139ifeq ($(skip-makefile),)
140
141# If building an external module we do not care about the all: rule
142# but instead _all depend on modules
4f193362 143PHONY += all
1da177e4
LT
144ifeq ($(KBUILD_EXTMOD),)
145_all: all
146else
147_all: modules
148endif
149
150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
151TOPDIR := $(srctree)
152# FIXME - TOPDIR is obsolete, use srctree/objtree
153objtree := $(CURDIR)
154src := $(srctree)
155obj := $(objtree)
156
0f558c33 157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1da177e4
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158
159export srctree objtree VPATH TOPDIR
160
1da177e4
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161
162# SUBARCH tells the usermode build what the underlying arch is. That is set
163# first, and if a usermode build is happening, the "ARCH=um" on the command
164# line overrides the setting of ARCH below. If a native build is happening,
165# then ARCH is assigned, getting whatever value it gets normally, and
166# SUBARCH is subsequently ignored.
167
168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
39990b5e 170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
236b1957 171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
12760cb4 172 -e s/sh.*/sh/ )
1da177e4
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173
174# Cross compiling and selecting different set of gcc/bin-utils
175# ---------------------------------------------------------------------------
176#
177# When performing cross compilation for other architectures ARCH shall be set
178# to the target architecture. (See arch/* for the possibilities).
179# ARCH can be set during invocation of make:
180# make ARCH=ia64
181# Another way is to have ARCH set in the environment.
182# The default ARCH is the host where make is executed.
183
184# CROSS_COMPILE specify the prefix used for all executables used
185# during compilation. Only gcc and related bin-utils executables
186# are prefixed with $(CROSS_COMPILE).
187# CROSS_COMPILE can be set on the command line
188# make CROSS_COMPILE=ia64-linux-
189# Alternatively CROSS_COMPILE can be set in the environment.
190# Default value for CROSS_COMPILE is not to prefix executables
191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
4ce6efed 192export KBUILD_BUILDHOST := $(SUBARCH)
1da177e4
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193ARCH ?= $(SUBARCH)
194CROSS_COMPILE ?=
195
196# Architecture as present in compile.h
6752ed90
TG
197UTS_MACHINE := $(ARCH)
198SRCARCH := $(ARCH)
1da177e4 199
d746d647
SR
200# Additional ARCH settings for x86
201ifeq ($(ARCH),i386)
202 SRCARCH := x86
203endif
204ifeq ($(ARCH),x86_64)
205 SRCARCH := x86
206endif
74b469f2 207
5e538790 208# Additional ARCH settings for sparc
a439fe51 209ifeq ($(ARCH),sparc64)
5e538790 210 SRCARCH := sparc
a439fe51 211endif
2fb9b1bd 212
5e538790
SR
213# Where to locate arch specific headers
214hdr-arch := $(SRCARCH)
215
49148020
SR
216ifeq ($(ARCH),m68knommu)
217 hdr-arch := m68k
218endif
219
14cdd3c4
RZ
220KCONFIG_CONFIG ?= .config
221
1da177e4
LT
222# SHELL used by kbuild
223CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
224 else if [ -x /bin/bash ]; then echo /bin/bash; \
225 else echo sh; fi ; fi)
226
070b98bf
SR
227HOSTCC = gcc
228HOSTCXX = g++
229HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
230HOSTCXXFLAGS = -O2
1da177e4 231
070b98bf
SR
232# Decide whether to build built-in, modular, or both.
233# Normally, just do built-in.
1da177e4
LT
234
235KBUILD_MODULES :=
236KBUILD_BUILTIN := 1
237
238# If we have only "make modules", don't compile built-in objects.
239# When we're building modules with modversions, we need to consider
240# the built-in objects during the descend as well, in order to
070b98bf 241# make sure the checksums are up to date before we record them.
1da177e4
LT
242
243ifeq ($(MAKECMDGOALS),modules)
244 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
245endif
246
247# If we have "make <whatever> modules", compile modules
248# in addition to whatever we do anyway.
249# Just "make" or "make all" shall build modules as well
250
251ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
252 KBUILD_MODULES := 1
253endif
254
255ifeq ($(MAKECMDGOALS),)
256 KBUILD_MODULES := 1
257endif
258
e579d351 259export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
260export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
261
262# Beautify output
263# ---------------------------------------------------------------------------
264#
265# Normally, we echo the whole command before executing it. By making
266# that echo $($(quiet)$(cmd)), we now have the possibility to set
267# $(quiet) to choose other forms of output instead, e.g.
268#
269# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
270# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
271#
272# If $(quiet) is empty, the whole command will be printed.
273# If it is set to "quiet_", only the short version will be printed.
070b98bf 274# If it is set to "silent_", nothing will be printed at all, since
1da177e4
LT
275# the variable $(silent_cmd_cc_o_c) doesn't exist.
276#
a58a414f 277# A simple variant is to prefix commands with $(Q) - that's useful
1da177e4
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278# for commands that shall be hidden in non-verbose mode.
279#
280# $(Q)ln $@ :<
281#
282# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
283# If KBUILD_VERBOSE equals 1 then the above command is displayed.
284
285ifeq ($(KBUILD_VERBOSE),1)
286 quiet =
287 Q =
288else
289 quiet=quiet_
290 Q = @
291endif
292
293# If the user is running make -s (silent mode), suppress echoing of
294# commands
295
296ifneq ($(findstring s,$(MAKEFLAGS)),)
297 quiet=silent_
298endif
299
300export quiet Q KBUILD_VERBOSE
301
1da177e4
LT
302
303# Look for make include files relative to root of kernel src
304MAKEFLAGS += --include-dir=$(srctree)
305
1cacc9ab
SR
306# We need some generic definitions (do not try to remake the file).
307$(srctree)/scripts/Kbuild.include: ;
15964864 308include $(srctree)/scripts/Kbuild.include
1da177e4
LT
309
310# Make variables (CC, etc...)
311
312AS = $(CROSS_COMPILE)as
313LD = $(CROSS_COMPILE)ld
314CC = $(CROSS_COMPILE)gcc
315CPP = $(CC) -E
316AR = $(CROSS_COMPILE)ar
317NM = $(CROSS_COMPILE)nm
318STRIP = $(CROSS_COMPILE)strip
319OBJCOPY = $(CROSS_COMPILE)objcopy
320OBJDUMP = $(CROSS_COMPILE)objdump
321AWK = awk
322GENKSYMS = scripts/genksyms/genksyms
323DEPMOD = /sbin/depmod
324KALLSYMS = scripts/kallsyms
325PERL = perl
326CHECK = sparse
327
80a7d1d9
HE
328CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
329 -Wbitwise -Wno-return-void $(CF)
1da177e4
LT
330MODFLAGS = -DMODULE
331CFLAGS_MODULE = $(MODFLAGS)
332AFLAGS_MODULE = $(MODFLAGS)
114f5157 333LDFLAGS_MODULE =
1da177e4
LT
334CFLAGS_KERNEL =
335AFLAGS_KERNEL =
336
337
338# Use LINUXINCLUDE when you must reference the include/ directory.
339# Needed to be compatible with the O= option
340LINUXINCLUDE := -Iinclude \
2dd34b48 341 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
5e4786f7
SR
342 -I$(srctree)/arch/$(hdr-arch)/include \
343 -include include/linux/autoconf.h
1da177e4 344
d8672b40 345KBUILD_CPPFLAGS := -D__KERNEL__
1da177e4 346
a0f97e06 347KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
94bed2a9
DJ
348 -fno-strict-aliasing -fno-common \
349 -Werror-implicit-function-declaration
222d394d 350KBUILD_AFLAGS := -D__ASSEMBLY__
1da177e4 351
f1d28fb0
RZ
352# Read KERNELRELEASE from include/config/kernel.release (if it exists)
353KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
2244cbd8 354KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
cb58455c 355
070b98bf 356export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 357export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
070b98bf
SR
358export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
359export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 360
06c5040c 361export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
a0f97e06 362export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
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) $(build)=scripts/basic
382
cd05e6bd
JB
383# To avoid any implicit rule to kick in, define an empty command.
384scripts/basic/%: scripts_basic ;
385
4f193362 386PHONY += outputmakefile
fd5f0cd6
JB
387# outputmakefile generates a Makefile in the output directory, if using a
388# separate output directory. This allows convenient use of make in the
389# output directory.
1da177e4 390outputmakefile:
fd5f0cd6 391ifneq ($(KBUILD_SRC),)
92979997 392 $(Q)ln -fsn $(srctree) source
fd5f0cd6
JB
393 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
394 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
395endif
1da177e4
LT
396
397# To make sure we do not include .config for any of the *config targets
398# catch them early, and hand them over to scripts/kconfig/Makefile
399# It is allowed to specify more targets when calling make, including
400# mixing *config targets and build targets.
070b98bf 401# For example 'make oldconfig all'.
1da177e4
LT
402# Detect when mixed targets is specified, and make a second invocation
403# of make so .config is not included in this case either (for *config).
404
3eb3c740 405no-dot-config-targets := clean mrproper distclean \
c30a02e0 406 cscope TAGS tags help %docs check% \
3eb3c740
RZ
407 include/linux/version.h headers_% \
408 kernelrelease kernelversion
1da177e4
LT
409
410config-targets := 0
411mixed-targets := 0
412dot-config := 1
413
414ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
415 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
416 dot-config := 0
417 endif
418endif
419
420ifeq ($(KBUILD_EXTMOD),)
421 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
422 config-targets := 1
423 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
424 mixed-targets := 1
425 endif
426 endif
427endif
428
429ifeq ($(mixed-targets),1)
430# ===========================================================================
431# We're called with mixed targets (*config and build targets).
432# Handle them one by one.
433
434%:: FORCE
435 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
436
437else
438ifeq ($(config-targets),1)
439# ===========================================================================
440# *config targets only - make sure prerequisites are updated, and descend
441# in scripts/kconfig to make the *config target
442
443# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
444# KBUILD_DEFCONFIG may point out an alternative default configuration
445# used for 'make defconfig'
74b469f2 446include $(srctree)/arch/$(SRCARCH)/Makefile
61bee204 447export KBUILD_DEFCONFIG KBUILD_KCONFIG
1da177e4 448
31110ebb
SR
449config: scripts_basic outputmakefile FORCE
450 $(Q)mkdir -p include/linux include/config
451 $(Q)$(MAKE) $(build)=scripts/kconfig $@
452
453%config: scripts_basic outputmakefile FORCE
c955ccaf 454 $(Q)mkdir -p include/linux include/config
1da177e4
LT
455 $(Q)$(MAKE) $(build)=scripts/kconfig $@
456
457else
458# ===========================================================================
459# Build targets only - this includes vmlinux, arch specific targets, clean
460# targets and others. In general all targets except *config targets.
461
462ifeq ($(KBUILD_EXTMOD),)
463# Additional helpers built in scripts/
464# Carefully list dependencies so we do not try to build scripts twice
070b98bf 465# in parallel
4f193362 466PHONY += scripts
2e3646e5 467scripts: scripts_basic include/config/auto.conf
1da177e4
LT
468 $(Q)$(MAKE) $(build)=$(@)
469
1da177e4
LT
470# Objects we will link into vmlinux / subdirs we need to visit
471init-y := init/
4d2acfbf 472drivers-y := drivers/ sound/ firmware/
1da177e4
LT
473net-y := net/
474libs-y := lib/
475core-y := usr/
476endif # KBUILD_EXTMOD
477
478ifeq ($(dot-config),1)
9ee4e336
SR
479# Read in config
480-include include/config/auto.conf
1da177e4 481
9ee4e336 482ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
483# Read in dependencies to all Kconfig* files, make sure to run
484# oldconfig if changes are detected.
c955ccaf 485-include include/config/auto.conf.cmd
1da177e4 486
1da177e4 487# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 488$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 489
c955ccaf 490# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 491# with it and forgot to run make oldconfig.
070b98bf 492# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 493# we execute the config step to be sure to catch updated Kconfig files
14cdd3c4 494include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 495 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 496else
9ee4e336
SR
497# external modules needs include/linux/autoconf.h and include/config/auto.conf
498# but do not care if they are up-to-date. Use auto.conf to trigger the test
499PHONY += include/config/auto.conf
500
501include/config/auto.conf:
502 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
503 echo; \
504 echo " ERROR: Kernel configuration is invalid."; \
505 echo " include/linux/autoconf.h or $@ are missing."; \
506 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
507 echo; \
508 /bin/false)
509
510endif # KBUILD_EXTMOD
c955ccaf 511
1da177e4
LT
512else
513# Dummy target needed, because used as prerequisite
c955ccaf 514include/config/auto.conf: ;
9ee4e336 515endif # $(dot-config)
1da177e4
LT
516
517# The all: target is the default when no target is given on the
518# command line.
519# This allow a user to issue only 'make' to build a kernel including modules
070b98bf 520# Defaults vmlinux but it is usually overridden in the arch makefile
1da177e4
LT
521all: vmlinux
522
523ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
a0f97e06 524KBUILD_CFLAGS += -Os
1da177e4 525else
a0f97e06 526KBUILD_CFLAGS += -O2
1da177e4
LT
527endif
528
bef5b54b
RB
529include $(srctree)/arch/$(SRCARCH)/Makefile
530
35bb5b1e
AK
531ifneq (CONFIG_FRAME_WARN,0)
532KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
533endif
534
e06b8b98 535# Force gcc to behave correct even for buggy distributions
5d707e9c 536ifndef CONFIG_CC_STACKPROTECTOR
e06b8b98 537KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
5d707e9c 538endif
e06b8b98 539
1da177e4 540ifdef CONFIG_FRAME_POINTER
a0f97e06 541KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 542else
a0f97e06 543KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4
LT
544endif
545
546ifdef CONFIG_DEBUG_INFO
a0f97e06 547KBUILD_CFLAGS += -g
222d394d 548KBUILD_AFLAGS += -gdwarf-2
1da177e4
LT
549endif
550
606576ce 551ifdef CONFIG_FUNCTION_TRACER
16444a8a
ACM
552KBUILD_CFLAGS += -pg
553endif
554
91341d4b
SR
555# We trigger additional mismatches with less inlining
556ifdef CONFIG_DEBUG_SECTION_MISMATCH
557KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
558endif
559
e8e69931 560# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 561NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
562CHECKFLAGS += $(NOSTDINC_FLAGS)
563
1da177e4 564# warn about C99 declaration after statement
a0f97e06 565KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 566
070b98bf 567# disable pointer signed / unsigned warnings in gcc 4.0
a0f97e06 568KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
1da177e4 569
d0115552
LT
570# disable invalid "can't wrap" optimzations for signed / pointers
571KBUILD_CFLAGS += $(call cc-option,-fwrapv)
572
00308649
KM
573# revert to pre-gcc-4.4 behaviour of .eh_frame
574KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
575
06c5040c 576# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
69ee0b35
SR
577# But warn user when we do so
578warn-assign = \
579$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
580
581ifneq ($(KCPPFLAGS),)
582 $(call warn-assign,CPPFLAGS)
583 KBUILD_CPPFLAGS += $(KCPPFLAGS)
584endif
585ifneq ($(KAFLAGS),)
586 $(call warn-assign,AFLAGS)
587 KBUILD_AFLAGS += $(KAFLAGS)
588endif
589ifneq ($(KCFLAGS),)
590 $(call warn-assign,CFLAGS)
591 KBUILD_CFLAGS += $(KCFLAGS)
592endif
52bcc330 593
18991197
RM
594# Use --build-id when available.
595LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
596 $(call ld-option, -Wl$(comma)--build-id,))
597LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
598LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
599
1da177e4 600# Default kernel image to build when no specific target is given.
070b98bf 601# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
602# set in the environment
603# Also any assignments in arch/$(ARCH)/Makefile take precedence over
604# this default value
605export KBUILD_IMAGE ?= vmlinux
606
607#
608# INSTALL_PATH specifies where to place the updated kernel and system map
609# images. Default is /boot, but you can set it to other values
610export INSTALL_PATH ?= /boot
611
612#
613# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
614# relocations required by build roots. This is not defined in the
070b98bf 615# makefile but the argument can be passed to make if needed.
1da177e4
LT
616#
617
df9df036 618MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
619export MODLIB
620
ac031f26 621#
2ea03891
SR
622# INSTALL_MOD_STRIP, if defined, will cause modules to be
623# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
624# the default option --strip-debug will be used. Otherwise,
625# INSTALL_MOD_STRIP will used as the options to the strip command.
626
ac031f26
TT
627ifdef INSTALL_MOD_STRIP
628ifeq ($(INSTALL_MOD_STRIP),1)
2ea03891 629mod_strip_cmd = $(STRIP) --strip-debug
ac031f26 630else
2ea03891 631mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
ac031f26
TT
632endif # INSTALL_MOD_STRIP=1
633else
2ea03891 634mod_strip_cmd = true
ac031f26
TT
635endif # INSTALL_MOD_STRIP
636export mod_strip_cmd
637
1da177e4
LT
638
639ifeq ($(KBUILD_EXTMOD),)
3a65dfe8 640core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
641
642vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
643 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
644 $(net-y) $(net-m) $(libs-y) $(libs-m)))
645
646vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
647 $(init-n) $(init-) \
648 $(core-n) $(core-) $(drivers-n) $(drivers-) \
649 $(net-n) $(net-) $(libs-n) $(libs-))))
650
651init-y := $(patsubst %/, %/built-in.o, $(init-y))
652core-y := $(patsubst %/, %/built-in.o, $(core-y))
653drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
654net-y := $(patsubst %/, %/built-in.o, $(net-y))
655libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
656libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
657libs-y := $(libs-y1) $(libs-y2)
658
659# Build vmlinux
660# ---------------------------------------------------------------------------
070b98bf 661# vmlinux is built from the objects selected by $(vmlinux-init) and
1da177e4 662# $(vmlinux-main). Most are built-in.o files from top-level directories
2462566f 663# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
1da177e4
LT
664# Ordering when linking is important, and $(vmlinux-init) must be first.
665#
666# vmlinux
667# ^
668# |
669# +-< $(vmlinux-init)
670# | +--< init/version.o + more
671# |
672# +--< $(vmlinux-main)
673# | +--< driver/built-in.o mm/built-in.o + more
674# |
675# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
676#
677# vmlinux version (uname -v) cannot be updated during normal
678# descending-into-subdirs phase since we do not yet know if we need to
679# update vmlinux.
680# Therefore this step is delayed until just before final link of vmlinux -
681# except in the kallsyms case where it is done just before adding the
682# symbols to the kernel.
683#
684# System.map is generated to document addresses of all kernel symbols
685
686vmlinux-init := $(head-y) $(init-y)
687vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
688vmlinux-all := $(vmlinux-init) $(vmlinux-main)
6752ed90 689vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
85bd2fdd 690export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
1da177e4
LT
691
692# Rule to link vmlinux - also used during CONFIG_KALLSYMS
693# May be overridden by arch/$(ARCH)/Makefile
694quiet_cmd_vmlinux__ ?= LD $@
695 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
696 -T $(vmlinux-lds) $(vmlinux-init) \
697 --start-group $(vmlinux-main) --end-group \
741f98fe 698 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
1da177e4
LT
699
700# Generate new vmlinux version
701quiet_cmd_vmlinux_version = GEN .version
702 cmd_vmlinux_version = set -e; \
4e25d8bb
JB
703 if [ ! -r .version ]; then \
704 rm -f .version; \
705 echo 1 >.version; \
706 else \
707 mv .version .old_version; \
708 expr 0$$(cat .old_version) + 1 >.version; \
709 fi; \
1da177e4
LT
710 $(MAKE) $(build)=init
711
712# Generate System.map
070b98bf 713quiet_cmd_sysmap = SYSMAP
1da177e4
LT
714 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
715
716# Link of vmlinux
717# If CONFIG_KALLSYMS is set .version is already updated
718# Generate System.map and verify that the content is consistent
39ca371c
MR
719# Use + in front of the vmlinux_version rule to silent warning with make -j2
720# First command is ':' to allow us to use + in front of the rule
1da177e4 721define rule_vmlinux__
39ca371c 722 :
1da177e4
LT
723 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
724
725 $(call cmd,vmlinux__)
726 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
727
4635281c
SR
728 $(Q)$(if $($(quiet)cmd_sysmap), \
729 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
730 $(cmd_sysmap) $@ System.map; \
731 if [ $$? -ne 0 ]; then \
732 rm -f $@; \
733 /bin/false; \
1da177e4
LT
734 fi;
735 $(verify_kallsyms)
736endef
737
738
739ifdef CONFIG_KALLSYMS
740# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
741# It's a three stage process:
742# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
743# empty
744# Running kallsyms on that gives us .tmp_kallsyms1.o with
745# the right size - vmlinux version (uname -v) is updated during this step
746# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
747# but due to the added section, some addresses have shifted.
748# From here, we generate a correct .tmp_kallsyms2.o
749# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
750# o Verify that the System.map from vmlinux matches the map from
751# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
752# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
753# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
754# temporary bypass to allow the kernel to be built while the
755# maintainers work out what went wrong with kallsyms.
756
757ifdef CONFIG_KALLSYMS_EXTRA_PASS
758last_kallsyms := 3
759else
760last_kallsyms := 2
761endif
762
763kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
764
765define verify_kallsyms
4635281c
SR
766 $(Q)$(if $($(quiet)cmd_sysmap), \
767 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
1da177e4 768 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
4635281c
SR
769 $(Q)cmp -s System.map .tmp_System.map || \
770 (echo Inconsistent kallsyms data; \
771 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
1da177e4
LT
772 rm .tmp_kallsyms* ; /bin/false )
773endef
774
775# Update vmlinux version before link
776# Use + in front of this rule to silent warning about make -j1
72ba47c1 777# First command is ':' to allow us to use + in front of this rule
1da177e4
LT
778cmd_ksym_ld = $(cmd_vmlinux__)
779define rule_ksym_ld
72ba47c1 780 :
1da177e4
LT
781 +$(call cmd,vmlinux_version)
782 $(call cmd,vmlinux__)
783 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
784endef
785
786# Generate .S file with all kernel symbols
787quiet_cmd_kallsyms = KSYM $@
2ea03891
SR
788 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
789 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
9bb48247 790
2ea03891 791.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
1da177e4
LT
792 $(call if_changed_dep,as_o_S)
793
2ea03891 794.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
1da177e4
LT
795 $(call cmd,kallsyms)
796
797# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
2ea03891
SR
798.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
799 $(call if_changed_rule,ksym_ld)
1da177e4 800
2ea03891
SR
801.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
802 $(call if_changed,vmlinux__)
1da177e4 803
2ea03891
SR
804.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
805 $(call if_changed,vmlinux__)
1da177e4
LT
806
807# Needs to visit scripts/ before $(KALLSYMS) can be used.
808$(KALLSYMS): scripts ;
809
33bc25ea
SR
810# Generate some data for debugging strange kallsyms problems
811debug_kallsyms: .tmp_map$(last_kallsyms)
812
813.tmp_map%: .tmp_vmlinux% FORCE
814 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
815
816.tmp_map3: .tmp_map2
817
818.tmp_map2: .tmp_map1
819
1da177e4
LT
820endif # ifdef CONFIG_KALLSYMS
821
741f98fe
SR
822# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
823# relevant sections renamed as per the linker script.
824quiet_cmd_vmlinux-modpost = LD $@
825 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
826 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
90ebd878 827 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
741f98fe
SR
828define rule_vmlinux-modpost
829 :
830 +$(call cmd,vmlinux-modpost)
831 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
832 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
833endef
834
1da177e4 835# vmlinux image - including updated kernel symbols
310f8243 836vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
0f836e5f 837ifdef CONFIG_HEADERS_CHECK
0e7af8d0 838 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025
MD
839endif
840ifdef CONFIG_SAMPLES
841 $(Q)$(MAKE) $(build)=samples
3794f3e8
RD
842endif
843ifdef CONFIG_BUILD_DOCSRC
844 $(Q)$(MAKE) $(build)=Documentation
0f836e5f 845endif
741f98fe 846 $(call vmlinux-modpost)
1da177e4 847 $(call if_changed_rule,vmlinux__)
4e25d8bb 848 $(Q)rm -f .old_version
1da177e4 849
310f8243 850# build vmlinux.o first to catch section mismatch errors early
cf87dcd1
SR
851ifdef CONFIG_KALLSYMS
852.tmp_vmlinux1: vmlinux.o
853endif
90ebd878
SR
854
855modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
856vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
741f98fe
SR
857 $(call if_changed_rule,vmlinux-modpost)
858
1da177e4
LT
859# The actual objects are generated when descending,
860# make sure no implicit rule kicks in
861$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
862
863# Handle descending into subdirectories listed in $(vmlinux-dirs)
864# Preset locale variables to speed up the build process. Limit locale
865# tweaks to this spot to avoid wrong language settings when running
866# make menuconfig etc.
867# Error messages still appears in the original language
868
4f193362 869PHONY += $(vmlinux-dirs)
5bb78269 870$(vmlinux-dirs): prepare scripts
1da177e4
LT
871 $(Q)$(MAKE) $(build)=$@
872
cb58455c 873# Build the kernel release string
cb58455c 874#
1ef98856
RD
875# The KERNELRELEASE value built here is stored in the file
876# include/config/kernel.release, and is used when executing several
877# make targets, such as "make install" or "make modules_install."
878#
879# The eventual kernel release string consists of the following fields,
880# shown in a hierarchical format to show how smaller parts are concatenated
881# to form the larger and final value, with values coming from places like
882# the Makefile, kernel config options, make command line options and/or
883# SCM tag information.
884#
885# $(KERNELVERSION)
886# $(VERSION) eg, 2
887# $(PATCHLEVEL) eg, 6
888# $(SUBLEVEL) eg, 18
889# $(EXTRAVERSION) eg, -rc6
890# $(localver-full)
891# $(localver)
76c32956 892# localversion* (files without backups, containing '~')
1ef98856
RD
893# $(CONFIG_LOCALVERSION) (from kernel config setting)
894# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
895# ./scripts/setlocalversion (SCM tag, if one exists)
896# $(LOCALVERSION) (from make command line if provided)
897#
898# Note how the final $(localver-auto) string is included *only* if the
899# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
900# moment, only git is supported but other SCMs can edit the script
901# scripts/setlocalversion and add the appropriate checks as needed.
cb58455c 902
76c32956
OV
903pattern = ".*/localversion[^~]*"
904string = $(shell cat /dev/null \
fd19e44f 905 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
cb58455c 906
76c32956
OV
907localver = $(subst $(space),, $(string) \
908 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
070b98bf 909
cb58455c
SR
910# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
911# and if the SCM is know a tag from the SCM is appended.
070b98bf 912# The appended tag is determined by the SCM used.
cb58455c 913#
b925dbfe
JH
914# .scmversion is used when generating rpm packages so we do not loose
915# the version information from the SCM when we do the build of the kernel
916# from the copied source
cb58455c 917ifdef CONFIG_LOCALVERSION_AUTO
b925dbfe
JH
918
919ifeq ($(wildcard .scmversion),)
920 _localver-auto = $(shell $(CONFIG_SHELL) \
921 $(srctree)/scripts/setlocalversion $(srctree))
922else
923 _localver-auto = $(shell cat .scmversion 2> /dev/null)
924endif
925
cb58455c
SR
926 localver-auto = $(LOCALVERSION)$(_localver-auto)
927endif
928
929localver-full = $(localver)$(localver-auto)
930
f1d28fb0 931# Store (new) KERNELRELASE string in include/config/kernel.release
2244cbd8 932kernelrelease = $(KERNELVERSION)$(localver-full)
f1d28fb0 933include/config/kernel.release: include/config/auto.conf FORCE
2244cbd8
SR
934 $(Q)rm -f $@
935 $(Q)echo $(kernelrelease) > $@
cb58455c
SR
936
937
1da177e4 938# Things we need to do before we recursively start building the kernel
5bb78269
SR
939# or the modules are listed in "prepare".
940# A multi level approach is used. prepareN is processed before prepareN-1.
941# archprepare is used in arch Makefiles and when processed asm symlink,
942# version.h and scripts_basic is processed / created.
1da177e4 943
5bb78269 944# Listed in dependency order
4f193362 945PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 946
86feeaa8 947# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
948# and if so do:
949# 1) Check that make has not been executed in the kernel src $(srctree)
950# 2) Create the include2 directory, used for the second asm symlink
f1d28fb0 951prepare3: include/config/kernel.release
1da177e4 952ifneq ($(KBUILD_SRC),)
fd54f502 953 @$(kecho) ' Using $(srctree) as source for kernel'
c955ccaf 954 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1da177e4
LT
955 echo " $(srctree) is not clean, please run 'make mrproper'";\
956 echo " in the '$(srctree)' directory.";\
957 /bin/false; \
958 fi;
7a48bdd0
SR
959 $(Q)if [ ! -d include2 ]; then \
960 mkdir -p include2; \
2e57d051 961 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
7a48bdd0 962 fi
1da177e4
LT
963endif
964
86feeaa8
SR
965# prepare2 creates a makefile if using a separate output directory
966prepare2: prepare3 outputmakefile
1da177e4 967
3eb3c740
RZ
968prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
969 include/asm include/config/auto.conf
7bb9d092 970 $(cmd_crmodverdir)
1da177e4 971
5bb78269
SR
972archprepare: prepare1 scripts_basic
973
974prepare0: archprepare FORCE
8d36a623 975 $(Q)$(MAKE) $(build)=.
c53aeca0 976 $(Q)$(MAKE) $(build)=. missing-syscalls
86feeaa8 977
1da177e4 978# All the preparing..
d395efb5 979prepare: prepare0
1da177e4 980
070b98bf
SR
981# Leave this as default for preprocessing vmlinux.lds.S, which is now
982# done in arch/$(ARCH)/kernel/Makefile
1da177e4
LT
983
984export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
985
fc333b2d
SR
986# The asm symlink changes when $(ARCH) changes.
987# Detect this and ask user to run make mrproper
dcc2da1a 988# If asm is a stale symlink (point to dir that does not exist) remove it
2e57d051
SR
989define check-symlink
990 set -e; \
991 if [ -L include/asm ]; then \
992 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
993 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
fc333b2d
SR
994 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
995 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
2e57d051
SR
996 exit 1; \
997 fi; \
dcc2da1a
SR
998 test -e $$asmlink || rm include/asm; \
999 elif [ -d include/asm ]; then \
1000 echo "ERROR: $@ is a directory but a symlink was expected";\
1001 exit 1; \
fc333b2d 1002 fi
2e57d051
SR
1003endef
1004
1005# We create the target directory of the symlink if it does
5a9e67b1 1006# not exist so the test in check-symlink works and we have a
2e57d051
SR
1007# directory for generated filesas used by some architectures.
1008define create-symlink
1009 if [ ! -L include/asm ]; then \
fd54f502 1010 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
2e57d051
SR
1011 if [ ! -d include/asm-$(SRCARCH) ]; then \
1012 mkdir -p include/asm-$(SRCARCH); \
1013 fi; \
1014 ln -fsn asm-$(SRCARCH) $@; \
fc333b2d 1015 fi
2e57d051
SR
1016endef
1017
1018include/asm: FORCE
1019 $(Q)$(check-symlink)
1020 $(Q)$(create-symlink)
1da177e4 1021
1da177e4
LT
1022# Generate some files
1023# ---------------------------------------------------------------------------
1024
1025# KERNELRELEASE can change from a few different places, meaning version.h
1026# needs to be updated, so this check is forced on all builds
1027
1028uts_len := 64
63104eec
SR
1029define filechk_utsrelease.h
1030 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1031 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1032 exit 1; \
1033 fi; \
1034 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1035endef
1da177e4
LT
1036
1037define filechk_version.h
63104eec
SR
1038 (echo \#define LINUX_VERSION_CODE $(shell \
1039 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1040 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
1041endef
1042
63104eec 1043include/linux/version.h: $(srctree)/Makefile FORCE
1da177e4
LT
1044 $(call filechk,version.h)
1045
63104eec
SR
1046include/linux/utsrelease.h: include/config/kernel.release FORCE
1047 $(call filechk,utsrelease.h)
1048
179efcb4
VN
1049PHONY += headerdep
1050headerdep:
1051 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1052
1da177e4
LT
1053# ---------------------------------------------------------------------------
1054
4f193362 1055PHONY += depend dep
1da177e4
LT
1056depend dep:
1057 @echo '*** Warning: make $@ is unnecessary now.'
1058
88ecf814
DW
1059# ---------------------------------------------------------------------------
1060# Firmware install
1061INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1062export INSTALL_FW_PATH
1063
1064PHONY += firmware_install
1065firmware_install: FORCE
1066 @mkdir -p $(objtree)/firmware
1067 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1068
8d730cfb
DW
1069# ---------------------------------------------------------------------------
1070# Kernel headers
8d730cfb 1071
e6883b18
SR
1072#Default location for installed headers
1073export INSTALL_HDR_PATH = $(objtree)/usr
6d716275 1074
e6883b18 1075hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
2fb9b1bd
SR
1076# Find out where the Kbuild file is located to support
1077# arch/$(ARCH)/include/asm
1078hdr-dir = $(strip \
1079 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1080 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1081
1082# If we do an all arch process set dst to asm-$(hdr-arch)
1083hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
e6883b18
SR
1084
1085PHONY += __headers
1086__headers: include/linux/version.h scripts_basic FORCE
398477d4 1087 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
e6883b18
SR
1088
1089PHONY += headers_install_all
2fb9b1bd
SR
1090headers_install_all:
1091 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
6d716275 1092
8d730cfb 1093PHONY += headers_install
e6883b18 1094headers_install: __headers
2fb9b1bd
SR
1095 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1096 $(error Headers not exportable for the $(SRCARCH) architecture))
88181ec3 1097 $(Q)$(MAKE) $(hdr-inst)=include
2fb9b1bd 1098 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
8d730cfb 1099
1f85712e
MF
1100PHONY += headers_check_all
1101headers_check_all: headers_install_all
2fb9b1bd 1102 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1f85712e 1103
68475359
DW
1104PHONY += headers_check
1105headers_check: headers_install
88181ec3 1106 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
2fb9b1bd 1107 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
68475359 1108
1da177e4
LT
1109# ---------------------------------------------------------------------------
1110# Modules
1111
1112ifdef CONFIG_MODULES
1113
070b98bf 1114# By default, build modules as well
1da177e4
LT
1115
1116all: modules
1117
1118# Build modules
551559e1
TH
1119#
1120# A module can be listed more than once in obj-m resulting in
1121# duplicate lines in modules.order files. Those are removed
1122# using awk while concatenating to the final file.
1da177e4 1123
4f193362 1124PHONY += modules
1da177e4 1125modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
551559e1 1126 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
fd54f502 1127 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1128 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
44463f7d 1129 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1da177e4
LT
1130
1131
1132# Target to prepare building external modules
4f193362 1133PHONY += modules_prepare
5bb78269 1134modules_prepare: prepare scripts
1da177e4
LT
1135
1136# Target to install modules
4f193362 1137PHONY += modules_install
1da177e4
LT
1138modules_install: _modinst_ _modinst_post
1139
4f193362 1140PHONY += _modinst_
1da177e4 1141_modinst_:
ce454d4d 1142 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1da177e4
LT
1143 echo "Warning: you may need to install module-init-tools"; \
1144 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1145 sleep 1; \
1146 fi
1147 @rm -rf $(MODLIB)/kernel
1148 @rm -f $(MODLIB)/source
1149 @mkdir -p $(MODLIB)/kernel
1150 @ln -s $(srctree) $(MODLIB)/source
1151 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1152 rm -f $(MODLIB)/build ; \
1153 ln -s $(objtree) $(MODLIB)/build ; \
1154 fi
551559e1 1155 @cp -f $(objtree)/modules.order $(MODLIB)/
b805aa0e 1156 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1157
50a8ec31 1158# This depmod is only for convenience to give the initial
1da177e4
LT
1159# boot a modules.dep even before / is mounted read-write. However the
1160# boot script depmod is the master version.
4f193362 1161PHONY += _modinst_post
1da177e4 1162_modinst_post: _modinst_
88ecf814 1163 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
50a8ec31 1164 $(call cmd,depmod)
1da177e4
LT
1165
1166else # CONFIG_MODULES
1167
1168# Modules not configured
1169# ---------------------------------------------------------------------------
1170
1171modules modules_install: FORCE
1172 @echo
1173 @echo "The present kernel configuration has modules disabled."
1174 @echo "Type 'make config' and enable loadable module support."
1175 @echo "Then build a kernel with module support enabled."
1176 @echo
1177 @exit 1
1178
1179endif # CONFIG_MODULES
1180
1da177e4
LT
1181###
1182# Cleaning is done on three levels.
1183# make clean Delete most generated files
1184# Leave enough to build external modules
1185# make mrproper Delete the current configuration, and all generated files
1186# make distclean Remove editor backup files, patch leftover files and the like
1187
1188# Directories & files removed with 'make clean'
1189CLEAN_DIRS += $(MODVERDIR)
1190CLEAN_FILES += vmlinux System.map \
1191 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1192
1193# Directories & files removed with 'make mrproper'
1ab7a1f3 1194MRPROPER_DIRS += include/config include2 usr/include
50aa88e2 1195MRPROPER_FILES += .config .config.old include/asm .version .old_version \
3eb3c740
RZ
1196 include/linux/autoconf.h include/linux/version.h \
1197 include/linux/utsrelease.h \
7d3cc8b6 1198 include/linux/bounds.h include/asm*/asm-offsets.h \
c28ca3aa 1199 Module.symvers Module.markers tags TAGS cscope*
1da177e4
LT
1200
1201# clean - Delete most, but leave enough to build external modules
1202#
1203clean: rm-dirs := $(CLEAN_DIRS)
1204clean: rm-files := $(CLEAN_FILES)
3794f3e8 1205clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1da177e4 1206
4f193362 1207PHONY += $(clean-dirs) clean archclean
1da177e4
LT
1208$(clean-dirs):
1209 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1210
1211clean: archclean $(clean-dirs)
1212 $(call cmd,rmdirs)
1213 $(call cmd,rmfiles)
1214 @find . $(RCS_FIND_IGNORE) \
070b98bf 1215 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
15fde675 1216 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
d35cb360 1217 -o -name '*.symtypes' -o -name 'modules.order' \
6b36ab27 1218 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
1da177e4
LT
1219 -type f -print | xargs rm -f
1220
1221# mrproper - Delete all generated files, including .config
1222#
1223mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1224mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1225mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1226
4f193362 1227PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1228$(mrproper-dirs):
1229 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1230
1231mrproper: clean archmrproper $(mrproper-dirs)
1232 $(call cmd,rmdirs)
1233 $(call cmd,rmfiles)
1234
1235# distclean
1236#
4f193362 1237PHONY += distclean
1da177e4
LT
1238
1239distclean: mrproper
1240 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1241 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1242 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
070b98bf 1243 -o -name '.*.rej' -o -size 0 \
1da177e4
LT
1244 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1245 -type f -print | xargs rm -f
1246
1247
1248# Packaging of the kernel to various formats
1249# ---------------------------------------------------------------------------
1250# rpm target kept for backward compatibility
1251package-dir := $(srctree)/scripts/package
1252
031ecc6d 1253%pkg: include/config/kernel.release FORCE
6c2133e1 1254 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1255rpm: include/config/kernel.release FORCE
6c2133e1 1256 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1257
1258
1259# Brief documentation of the typical targets used
1260# ---------------------------------------------------------------------------
1261
5dffbe81 1262boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1da177e4 1263boards := $(notdir $(boards))
5dffbe81
SB
1264board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1265board-dirs := $(sort $(notdir $(board-dirs:/=)))
1da177e4
LT
1266
1267help:
1268 @echo 'Cleaning targets:'
5ea084ef 1269 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1270 @echo ' enough build support to build external modules'
5ea084ef 1271 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1272 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1273 @echo ''
1274 @echo 'Configuration targets:'
1275 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1276 @echo ''
1277 @echo 'Other generic targets:'
1278 @echo ' all - Build all targets marked with [*]'
1279 @echo '* vmlinux - Build the bare kernel'
1280 @echo '* modules - Build all modules'
9cc5d74c 1281 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
88ecf814
DW
1282 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1283 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1da177e4
LT
1284 @echo ' dir/ - Build all files in dir and below'
1285 @echo ' dir/file.[ois] - Build specified target only'
155ad605 1286 @echo ' dir/file.ko - Build module including final link'
243f40ce 1287 @echo ' prepare - Set up for building external modules'
1da177e4
LT
1288 @echo ' tags/TAGS - Generate tags file for editors'
1289 @echo ' cscope - Generate cscope index'
6d128842 1290 @echo ' kernelrelease - Output the release version string'
cb58455c 1291 @echo ' kernelversion - Output the version stored in Makefile'
2fb9b1bd 1292 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1293 echo ' (default: $(INSTALL_HDR_PATH))'; \
2fb9b1bd 1294 echo ''
1da177e4 1295 @echo 'Static analysers'
1da177e4
LT
1296 @echo ' checkstack - Generate a list of stack hogs'
1297 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1298 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1299 @echo ' includecheck - Check for duplicate included header files'
295ac051 1300 @echo ' export_report - List the usages of all exported symbols'
179efcb4
VN
1301 @echo ' headers_check - Sanity check on exported headers'
1302 @echo ' headerdep - Detect inclusion cycles in headers'; \
2fb9b1bd 1303 echo ''
1da177e4 1304 @echo 'Kernel packaging:'
6c2133e1 1305 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1306 @echo ''
1307 @echo 'Documentation targets:'
1308 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1309 @echo ''
01dee188 1310 @echo 'Architecture specific targets ($(SRCARCH)):'
1da177e4 1311 @$(if $(archhelp),$(archhelp),\
01dee188 1312 echo ' No architecture specific help defined for $(SRCARCH)')
1da177e4
LT
1313 @echo ''
1314 @$(if $(boards), \
1315 $(foreach b, $(boards), \
1316 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1317 echo '')
5dffbe81
SB
1318 @$(if $(board-dirs), \
1319 $(foreach b, $(board-dirs), \
1320 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1321 printf " %-16s - Show all of the above\\n" help-boards; \
1322 echo '')
1da177e4
LT
1323
1324 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1325 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1326 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1327 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1328 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1da177e4
LT
1329 @echo ''
1330 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1331 @echo 'For further info see the ./README file'
1332
1333
5dffbe81
SB
1334help-board-dirs := $(addprefix help-,$(board-dirs))
1335
1336help-boards: $(help-board-dirs)
1337
1338boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1339
1340$(help-board-dirs): help-%:
1341 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1342 @$(if $(boards-per-dir), \
1343 $(foreach b, $(boards-per-dir), \
1344 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1345 echo '')
1346
1347
1da177e4
LT
1348# Documentation targets
1349# ---------------------------------------------------------------------------
1350%docs: scripts_basic FORCE
1351 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1352
1353else # KBUILD_EXTMOD
1354
1355###
1356# External module support.
1357# When building external modules the kernel used as basis is considered
1358# read-only, and no consistency checks are made and the make
1359# system is not used on the basis kernel. If updates are required
1360# in the basis kernel ordinary make commands (without M=...) must
1361# be used.
1362#
1363# The following are the only valid targets when building external
1364# modules.
1365# make M=dir clean Delete all automatically generated files
1366# make M=dir modules Make all modules in specified dir
1367# make M=dir Same as 'make M=dir modules'
1368# make M=dir modules_install
070b98bf 1369# Install the modules built in the module directory
1da177e4
LT
1370# Assumes install directory is already created
1371
1372# We are always building modules
1373KBUILD_MODULES := 1
4f193362 1374PHONY += crmodverdir
1da177e4 1375crmodverdir:
7bb9d092 1376 $(cmd_crmodverdir)
1da177e4 1377
4f193362 1378PHONY += $(objtree)/Module.symvers
1da177e4
LT
1379$(objtree)/Module.symvers:
1380 @test -e $(objtree)/Module.symvers || ( \
1381 echo; \
1382 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1383 echo " is missing; modules will have no dependencies and modversions."; \
1384 echo )
1385
1386module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1387PHONY += $(module-dirs) modules
1da177e4
LT
1388$(module-dirs): crmodverdir $(objtree)/Module.symvers
1389 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1390
1391modules: $(module-dirs)
fd54f502 1392 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1393 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1394
4f193362 1395PHONY += modules_install
a67dc21a 1396modules_install: _emodinst_ _emodinst_post
e6304663 1397
4f193362
PS
1398install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1399PHONY += _emodinst_
a67dc21a 1400_emodinst_:
a67dc21a 1401 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1402 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1403
4f193362 1404PHONY += _emodinst_post
a67dc21a
SR
1405_emodinst_post: _emodinst_
1406 $(call cmd,depmod)
1407
1da177e4
LT
1408clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1409
4f193362 1410PHONY += $(clean-dirs) clean
1da177e4
LT
1411$(clean-dirs):
1412 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1413
1414clean: rm-dirs := $(MODVERDIR)
c34114f4 1415clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1da177e4
LT
1416clean: $(clean-dirs)
1417 $(call cmd,rmdirs)
c34114f4 1418 $(call cmd,rmfiles)
1da177e4 1419 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
070b98bf 1420 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1da177e4
LT
1421 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1422 -type f -print | xargs rm -f
1423
1424help:
1425 @echo ' Building external modules.'
1426 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1427 @echo ''
1428 @echo ' modules - default target, build the module(s)'
1429 @echo ' modules_install - install the module'
1430 @echo ' clean - remove generated files in module directory only'
1431 @echo ''
06300b21
SR
1432
1433# Dummies...
4f193362 1434PHONY += prepare scripts
06300b21
SR
1435prepare: ;
1436scripts: ;
1da177e4
LT
1437endif # KBUILD_EXTMOD
1438
1439# Generate tags for editors
1440# ---------------------------------------------------------------------------
a680eedc
SR
1441quiet_cmd_tags = GEN $@
1442 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1da177e4 1443
a680eedc 1444tags TAGS cscope: FORCE
1da177e4
LT
1445 $(call cmd,tags)
1446
1da177e4
LT
1447# Scripts to check various things for consistency
1448# ---------------------------------------------------------------------------
1449
1da177e4
LT
1450includecheck:
1451 find * $(RCS_FIND_IGNORE) \
1452 -name '*.[hcS]' -type f -print | sort \
80007434 1453 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1454
1455versioncheck:
1456 find * $(RCS_FIND_IGNORE) \
1457 -name '*.[hcS]' -type f -print | sort \
80007434 1458 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1459
1da177e4
LT
1460namespacecheck:
1461 $(PERL) $(srctree)/scripts/namespace.pl
1462
295ac051
AB
1463export_report:
1464 $(PERL) $(srctree)/scripts/export_report.pl
1465
1da177e4
LT
1466endif #ifeq ($(config-targets),1)
1467endif #ifeq ($(mixed-targets),1)
1468
c30a02e0 1469PHONY += checkstack kernelrelease kernelversion
e3ccf6e3 1470
011e3a9a
JD
1471# UML needs a little special treatment here. It wants to use the host
1472# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1473# else wants $(ARCH), including people doing cross-builds, which means
1474# that $(SUBARCH) doesn't work here.
1475ifeq ($(ARCH), um)
1476CHECKSTACK_ARCH := $(SUBARCH)
1477else
1478CHECKSTACK_ARCH := $(ARCH)
1479endif
1da177e4
LT
1480checkstack:
1481 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1482 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4
LT
1483
1484kernelrelease:
f1d28fb0
RZ
1485 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1486 $(error kernelrelease not valid - run 'make prepare' to update it))
cb58455c 1487kernelversion:
2244cbd8 1488 @echo $(KERNELVERSION)
1da177e4 1489
06300b21
SR
1490# Single targets
1491# ---------------------------------------------------------------------------
bc2546a6 1492# Single targets are compatible with:
e1b8513d 1493# - build with mixed source and output
bc2546a6
SR
1494# - build with separate output dir 'make O=...'
1495# - external modules
1496#
1497# target-dir => where to store outputfile
1498# build-dir => directory in kernel source tree to use
1499
1500ifeq ($(KBUILD_EXTMOD),)
aa360879 1501 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1502 target-dir = $(dir $@)
1503else
1504 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1505 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1506 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1507endif
1508
f6ecebd6 1509%.s: %.c prepare scripts FORCE
bc2546a6 1510 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1511%.i: %.c prepare scripts FORCE
bc2546a6 1512 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1513%.o: %.c prepare scripts FORCE
bc2546a6 1514 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1515%.lst: %.c prepare scripts FORCE
bc2546a6 1516 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1517%.s: %.S prepare scripts FORCE
bc2546a6 1518 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1519%.o: %.S prepare scripts FORCE
bc2546a6 1520 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1521%.symtypes: %.c prepare scripts FORCE
1522 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1523
bc2546a6 1524# Modules
31110ebb
SR
1525/: prepare scripts FORCE
1526 $(cmd_crmodverdir)
1527 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1528 $(build)=$(build-dir)
1529%/: prepare scripts FORCE
7bb9d092 1530 $(cmd_crmodverdir)
06300b21 1531 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1532 $(build)=$(build-dir)
1533%.ko: prepare scripts FORCE
7bb9d092 1534 $(cmd_crmodverdir)
06300b21 1535 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1536 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1537 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1538
1da177e4
LT
1539# FIXME Should go into a make.lib or something
1540# ===========================================================================
1541
1542quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1543 cmd_rmdirs = rm -rf $(rm-dirs)
1544
1545quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1546 cmd_rmfiles = rm -f $(rm-files)
1547
bc3c26fe 1548# Run depmod only if we have System.map and depmod is executable
50a8ec31
SR
1549quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1550 cmd_depmod = \
d8d2e78a 1551 if [ -r System.map -a -x $(DEPMOD) ]; then \
50a8ec31 1552 $(DEPMOD) -ae -F System.map \
75bccd88 1553 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
50a8ec31
SR
1554 $(KERNELRELEASE); \
1555 fi
1556
7bb9d092 1557# Create temporary dir for module support files
ab19f879
SR
1558# clean it up only when building all modules
1559cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1560 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1da177e4 1561
222d394d 1562a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
d8672b40 1563 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
5e8d780d 1564 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1da177e4
LT
1565
1566quiet_cmd_as_o_S = AS $@
1567cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1568
1569# read all saved command lines
1570
1571targets := $(wildcard $(sort $(targets)))
1572cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1573
1574ifneq ($(cmd_files),)
1575 $(cmd_files): ; # Do not try to update included dependency files
1576 include $(cmd_files)
1577endif
1578
1da177e4
LT
1579# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1580# Usage:
1581# $(Q)$(MAKE) $(clean)=dir
1582clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1583
1da177e4
LT
1584endif # skip-makefile
1585
4f193362 1586PHONY += FORCE
1da177e4 1587FORCE:
4f193362 1588
4f193362
PS
1589# Declare the contents of the .PHONY variable as phony. We keep that
1590# information in a variable se we can use it in if_changed and friends.
1591.PHONY: $(PHONY)