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1da177e4
LT
1VERSION = 2
2PATCHLEVEL = 6
19af3554 3SUBLEVEL = 25
f764e514 4EXTRAVERSION =
101142c3 5NAME = Funky Weasel is Jiggy wit it
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
38ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42endif
43ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45endif
46
1c7bafe7
RD
47# Call a source code checker (by default, "sparse") as part of the
48# C compilation.
49#
50# Use 'make C=1' to enable checking of only re-compiled files.
51# Use 'make C=2' to enable checking of *all* source files, regardless
52# of whether they are re-compiled or not.
53#
54# See the file "Documentation/sparse.txt" for more details, including
55# where to get the "sparse" utility.
1da177e4
LT
56
57ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61endif
62ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64endif
65
66# Use make M=dir to specify directory of external module to build
67# Old syntax make ... SUBDIRS=$PWD is still supported
68# Setting the environment variable KBUILD_EXTMOD take precedence
69ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71endif
72ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76endif
77
78
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
070b98bf 84#
1da177e4
LT
85# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(KBUILD_SRC),)
98
99# OK, Make called in directory where kernel src resides
100# Do we want to locate output files in a separate directory?
101ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
4f193362 108PHONY := _all
1da177e4
LT
109_all:
110
1cacc9ab
SR
111# Cancel implicit rules on top Makefile
112$(CURDIR)/Makefile Makefile: ;
113
1da177e4
LT
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
LT
158
159export srctree objtree VPATH TOPDIR
160
1da177e4
LT
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
LT
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
LT
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
14cdd3c4
RZ
208KCONFIG_CONFIG ?= .config
209
1da177e4
LT
210# SHELL used by kbuild
211CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
212 else if [ -x /bin/bash ]; then echo /bin/bash; \
213 else echo sh; fi ; fi)
214
070b98bf
SR
215HOSTCC = gcc
216HOSTCXX = g++
217HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
218HOSTCXXFLAGS = -O2
1da177e4 219
070b98bf
SR
220# Decide whether to build built-in, modular, or both.
221# Normally, just do built-in.
1da177e4
LT
222
223KBUILD_MODULES :=
224KBUILD_BUILTIN := 1
225
226# If we have only "make modules", don't compile built-in objects.
227# When we're building modules with modversions, we need to consider
228# the built-in objects during the descend as well, in order to
070b98bf 229# make sure the checksums are up to date before we record them.
1da177e4
LT
230
231ifeq ($(MAKECMDGOALS),modules)
232 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
233endif
234
235# If we have "make <whatever> modules", compile modules
236# in addition to whatever we do anyway.
237# Just "make" or "make all" shall build modules as well
238
239ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
240 KBUILD_MODULES := 1
241endif
242
243ifeq ($(MAKECMDGOALS),)
244 KBUILD_MODULES := 1
245endif
246
e579d351 247export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
248export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
249
250# Beautify output
251# ---------------------------------------------------------------------------
252#
253# Normally, we echo the whole command before executing it. By making
254# that echo $($(quiet)$(cmd)), we now have the possibility to set
255# $(quiet) to choose other forms of output instead, e.g.
256#
257# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
258# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
259#
260# If $(quiet) is empty, the whole command will be printed.
261# If it is set to "quiet_", only the short version will be printed.
070b98bf 262# If it is set to "silent_", nothing will be printed at all, since
1da177e4
LT
263# the variable $(silent_cmd_cc_o_c) doesn't exist.
264#
a58a414f 265# A simple variant is to prefix commands with $(Q) - that's useful
1da177e4
LT
266# for commands that shall be hidden in non-verbose mode.
267#
268# $(Q)ln $@ :<
269#
270# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
271# If KBUILD_VERBOSE equals 1 then the above command is displayed.
272
273ifeq ($(KBUILD_VERBOSE),1)
274 quiet =
275 Q =
276else
277 quiet=quiet_
278 Q = @
279endif
280
281# If the user is running make -s (silent mode), suppress echoing of
282# commands
283
284ifneq ($(findstring s,$(MAKEFLAGS)),)
285 quiet=silent_
286endif
287
288export quiet Q KBUILD_VERBOSE
289
1da177e4
LT
290
291# Look for make include files relative to root of kernel src
292MAKEFLAGS += --include-dir=$(srctree)
293
1cacc9ab
SR
294# We need some generic definitions (do not try to remake the file).
295$(srctree)/scripts/Kbuild.include: ;
15964864 296include $(srctree)/scripts/Kbuild.include
1da177e4
LT
297
298# Make variables (CC, etc...)
299
300AS = $(CROSS_COMPILE)as
301LD = $(CROSS_COMPILE)ld
302CC = $(CROSS_COMPILE)gcc
303CPP = $(CC) -E
304AR = $(CROSS_COMPILE)ar
305NM = $(CROSS_COMPILE)nm
306STRIP = $(CROSS_COMPILE)strip
307OBJCOPY = $(CROSS_COMPILE)objcopy
308OBJDUMP = $(CROSS_COMPILE)objdump
309AWK = awk
310GENKSYMS = scripts/genksyms/genksyms
311DEPMOD = /sbin/depmod
312KALLSYMS = scripts/kallsyms
313PERL = perl
314CHECK = sparse
315
af4ca457 316CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
1da177e4
LT
317MODFLAGS = -DMODULE
318CFLAGS_MODULE = $(MODFLAGS)
319AFLAGS_MODULE = $(MODFLAGS)
114f5157 320LDFLAGS_MODULE =
1da177e4
LT
321CFLAGS_KERNEL =
322AFLAGS_KERNEL =
323
324
325# Use LINUXINCLUDE when you must reference the include/ directory.
326# Needed to be compatible with the O= option
327LINUXINCLUDE := -Iinclude \
2dd34b48 328 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
e623a3b8 329 -include include/linux/autoconf.h
1da177e4 330
06c5040c 331KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
1da177e4 332
a0f97e06 333KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
94bed2a9
DJ
334 -fno-strict-aliasing -fno-common \
335 -Werror-implicit-function-declaration
222d394d 336KBUILD_AFLAGS := -D__ASSEMBLY__
1da177e4 337
f1d28fb0
RZ
338# Read KERNELRELEASE from include/config/kernel.release (if it exists)
339KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
2244cbd8 340KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
cb58455c 341
070b98bf 342export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 343export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
070b98bf
SR
344export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
345export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 346
06c5040c 347export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
a0f97e06 348export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
222d394d 349export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
1da177e4
LT
350
351# When compiling out-of-tree modules, put MODVERDIR in the module
352# tree rather than in the kernel tree. The kernel tree might
353# even be read-only.
354export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
355
1da177e4
LT
356# Files to ignore in find ... statements
357
406119f4
TM
358RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
359export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
360
361# ===========================================================================
362# Rules shared between *config targets and build targets
363
364# Basic helpers built in scripts/
4f193362 365PHONY += scripts_basic
1da177e4
LT
366scripts_basic:
367 $(Q)$(MAKE) $(build)=scripts/basic
368
cd05e6bd
JB
369# To avoid any implicit rule to kick in, define an empty command.
370scripts/basic/%: scripts_basic ;
371
4f193362 372PHONY += outputmakefile
fd5f0cd6
JB
373# outputmakefile generates a Makefile in the output directory, if using a
374# separate output directory. This allows convenient use of make in the
375# output directory.
1da177e4 376outputmakefile:
fd5f0cd6
JB
377ifneq ($(KBUILD_SRC),)
378 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
379 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
380endif
1da177e4
LT
381
382# To make sure we do not include .config for any of the *config targets
383# catch them early, and hand them over to scripts/kconfig/Makefile
384# It is allowed to specify more targets when calling make, including
385# mixing *config targets and build targets.
070b98bf 386# For example 'make oldconfig all'.
1da177e4
LT
387# Detect when mixed targets is specified, and make a second invocation
388# of make so .config is not included in this case either (for *config).
389
3eb3c740 390no-dot-config-targets := clean mrproper distclean \
c30a02e0 391 cscope TAGS tags help %docs check% \
3eb3c740
RZ
392 include/linux/version.h headers_% \
393 kernelrelease kernelversion
1da177e4
LT
394
395config-targets := 0
396mixed-targets := 0
397dot-config := 1
398
399ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
400 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
401 dot-config := 0
402 endif
403endif
404
405ifeq ($(KBUILD_EXTMOD),)
406 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
407 config-targets := 1
408 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
409 mixed-targets := 1
410 endif
411 endif
412endif
413
414ifeq ($(mixed-targets),1)
415# ===========================================================================
416# We're called with mixed targets (*config and build targets).
417# Handle them one by one.
418
419%:: FORCE
420 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
421
422else
423ifeq ($(config-targets),1)
424# ===========================================================================
425# *config targets only - make sure prerequisites are updated, and descend
426# in scripts/kconfig to make the *config target
427
428# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
429# KBUILD_DEFCONFIG may point out an alternative default configuration
430# used for 'make defconfig'
74b469f2 431include $(srctree)/arch/$(SRCARCH)/Makefile
1da177e4
LT
432export KBUILD_DEFCONFIG
433
cd05e6bd 434config %config: scripts_basic outputmakefile FORCE
c955ccaf 435 $(Q)mkdir -p include/linux include/config
1da177e4
LT
436 $(Q)$(MAKE) $(build)=scripts/kconfig $@
437
438else
439# ===========================================================================
440# Build targets only - this includes vmlinux, arch specific targets, clean
441# targets and others. In general all targets except *config targets.
442
443ifeq ($(KBUILD_EXTMOD),)
444# Additional helpers built in scripts/
445# Carefully list dependencies so we do not try to build scripts twice
070b98bf 446# in parallel
4f193362 447PHONY += scripts
2e3646e5 448scripts: scripts_basic include/config/auto.conf
1da177e4
LT
449 $(Q)$(MAKE) $(build)=$(@)
450
1da177e4
LT
451# Objects we will link into vmlinux / subdirs we need to visit
452init-y := init/
453drivers-y := drivers/ sound/
454net-y := net/
455libs-y := lib/
456core-y := usr/
457endif # KBUILD_EXTMOD
458
459ifeq ($(dot-config),1)
9ee4e336
SR
460# Read in config
461-include include/config/auto.conf
1da177e4 462
9ee4e336 463ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
464# Read in dependencies to all Kconfig* files, make sure to run
465# oldconfig if changes are detected.
c955ccaf 466-include include/config/auto.conf.cmd
1da177e4 467
1da177e4 468# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 469$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 470
c955ccaf 471# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 472# with it and forgot to run make oldconfig.
070b98bf 473# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 474# we execute the config step to be sure to catch updated Kconfig files
14cdd3c4 475include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 476 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 477else
9ee4e336
SR
478# external modules needs include/linux/autoconf.h and include/config/auto.conf
479# but do not care if they are up-to-date. Use auto.conf to trigger the test
480PHONY += include/config/auto.conf
481
482include/config/auto.conf:
483 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
484 echo; \
485 echo " ERROR: Kernel configuration is invalid."; \
486 echo " include/linux/autoconf.h or $@ are missing."; \
487 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
488 echo; \
489 /bin/false)
490
491endif # KBUILD_EXTMOD
c955ccaf 492
1da177e4
LT
493else
494# Dummy target needed, because used as prerequisite
c955ccaf 495include/config/auto.conf: ;
9ee4e336 496endif # $(dot-config)
1da177e4
LT
497
498# The all: target is the default when no target is given on the
499# command line.
500# This allow a user to issue only 'make' to build a kernel including modules
070b98bf 501# Defaults vmlinux but it is usually overridden in the arch makefile
1da177e4
LT
502all: vmlinux
503
504ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
a0f97e06 505KBUILD_CFLAGS += -Os
1da177e4 506else
a0f97e06 507KBUILD_CFLAGS += -O2
1da177e4
LT
508endif
509
35bb5b1e
AK
510ifneq (CONFIG_FRAME_WARN,0)
511KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
512endif
513
e06b8b98
SR
514# Force gcc to behave correct even for buggy distributions
515# Arch Makefiles may override this setting
516KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
517
74b469f2 518include $(srctree)/arch/$(SRCARCH)/Makefile
c9eca0b9 519
1da177e4 520ifdef CONFIG_FRAME_POINTER
a0f97e06 521KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 522else
a0f97e06 523KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4
LT
524endif
525
526ifdef CONFIG_DEBUG_INFO
a0f97e06 527KBUILD_CFLAGS += -g
222d394d 528KBUILD_AFLAGS += -gdwarf-2
1da177e4
LT
529endif
530
91341d4b
SR
531# We trigger additional mismatches with less inlining
532ifdef CONFIG_DEBUG_SECTION_MISMATCH
533KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
534endif
535
e8e69931 536# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 537NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
538CHECKFLAGS += $(NOSTDINC_FLAGS)
539
1da177e4 540# warn about C99 declaration after statement
a0f97e06 541KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 542
070b98bf 543# disable pointer signed / unsigned warnings in gcc 4.0
a0f97e06 544KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
1da177e4 545
06c5040c 546# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
69ee0b35
SR
547# But warn user when we do so
548warn-assign = \
549$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
550
551ifneq ($(KCPPFLAGS),)
552 $(call warn-assign,CPPFLAGS)
553 KBUILD_CPPFLAGS += $(KCPPFLAGS)
554endif
555ifneq ($(KAFLAGS),)
556 $(call warn-assign,AFLAGS)
557 KBUILD_AFLAGS += $(KAFLAGS)
558endif
559ifneq ($(KCFLAGS),)
560 $(call warn-assign,CFLAGS)
561 KBUILD_CFLAGS += $(KCFLAGS)
562endif
52bcc330 563
18991197
RM
564# Use --build-id when available.
565LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
566 $(call ld-option, -Wl$(comma)--build-id,))
567LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
568LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
569
1da177e4 570# Default kernel image to build when no specific target is given.
070b98bf 571# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
572# set in the environment
573# Also any assignments in arch/$(ARCH)/Makefile take precedence over
574# this default value
575export KBUILD_IMAGE ?= vmlinux
576
577#
578# INSTALL_PATH specifies where to place the updated kernel and system map
579# images. Default is /boot, but you can set it to other values
580export INSTALL_PATH ?= /boot
581
582#
583# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
584# relocations required by build roots. This is not defined in the
070b98bf 585# makefile but the argument can be passed to make if needed.
1da177e4
LT
586#
587
df9df036 588MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
589export MODLIB
590
ac031f26
TT
591#
592# INSTALL_MOD_STRIP, if defined, will cause modules to be
593# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
594# the default option --strip-debug will be used. Otherwise,
595# INSTALL_MOD_STRIP will used as the options to the strip command.
596
597ifdef INSTALL_MOD_STRIP
598ifeq ($(INSTALL_MOD_STRIP),1)
e340221a 599mod_strip_cmd = $(STRIP) --strip-debug
ac031f26
TT
600else
601mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
602endif # INSTALL_MOD_STRIP=1
603else
604mod_strip_cmd = true
605endif # INSTALL_MOD_STRIP
606export mod_strip_cmd
607
1da177e4
LT
608
609ifeq ($(KBUILD_EXTMOD),)
3a65dfe8 610core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
611
612vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
613 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
614 $(net-y) $(net-m) $(libs-y) $(libs-m)))
615
616vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
617 $(init-n) $(init-) \
618 $(core-n) $(core-) $(drivers-n) $(drivers-) \
619 $(net-n) $(net-) $(libs-n) $(libs-))))
620
621init-y := $(patsubst %/, %/built-in.o, $(init-y))
622core-y := $(patsubst %/, %/built-in.o, $(core-y))
623drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
624net-y := $(patsubst %/, %/built-in.o, $(net-y))
625libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
626libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
627libs-y := $(libs-y1) $(libs-y2)
628
629# Build vmlinux
630# ---------------------------------------------------------------------------
070b98bf 631# vmlinux is built from the objects selected by $(vmlinux-init) and
1da177e4 632# $(vmlinux-main). Most are built-in.o files from top-level directories
2462566f 633# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
1da177e4
LT
634# Ordering when linking is important, and $(vmlinux-init) must be first.
635#
636# vmlinux
637# ^
638# |
639# +-< $(vmlinux-init)
640# | +--< init/version.o + more
641# |
642# +--< $(vmlinux-main)
643# | +--< driver/built-in.o mm/built-in.o + more
644# |
645# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
646#
647# vmlinux version (uname -v) cannot be updated during normal
648# descending-into-subdirs phase since we do not yet know if we need to
649# update vmlinux.
650# Therefore this step is delayed until just before final link of vmlinux -
651# except in the kallsyms case where it is done just before adding the
652# symbols to the kernel.
653#
654# System.map is generated to document addresses of all kernel symbols
655
656vmlinux-init := $(head-y) $(init-y)
657vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
658vmlinux-all := $(vmlinux-init) $(vmlinux-main)
6752ed90 659vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
85bd2fdd 660export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
1da177e4
LT
661
662# Rule to link vmlinux - also used during CONFIG_KALLSYMS
663# May be overridden by arch/$(ARCH)/Makefile
664quiet_cmd_vmlinux__ ?= LD $@
665 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
666 -T $(vmlinux-lds) $(vmlinux-init) \
667 --start-group $(vmlinux-main) --end-group \
741f98fe 668 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
1da177e4
LT
669
670# Generate new vmlinux version
671quiet_cmd_vmlinux_version = GEN .version
672 cmd_vmlinux_version = set -e; \
4e25d8bb
JB
673 if [ ! -r .version ]; then \
674 rm -f .version; \
675 echo 1 >.version; \
676 else \
677 mv .version .old_version; \
678 expr 0$$(cat .old_version) + 1 >.version; \
679 fi; \
1da177e4
LT
680 $(MAKE) $(build)=init
681
682# Generate System.map
070b98bf 683quiet_cmd_sysmap = SYSMAP
1da177e4
LT
684 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
685
686# Link of vmlinux
687# If CONFIG_KALLSYMS is set .version is already updated
688# Generate System.map and verify that the content is consistent
39ca371c
MR
689# Use + in front of the vmlinux_version rule to silent warning with make -j2
690# First command is ':' to allow us to use + in front of the rule
1da177e4 691define rule_vmlinux__
39ca371c 692 :
1da177e4
LT
693 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
694
695 $(call cmd,vmlinux__)
696 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
697
4635281c
SR
698 $(Q)$(if $($(quiet)cmd_sysmap), \
699 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
700 $(cmd_sysmap) $@ System.map; \
701 if [ $$? -ne 0 ]; then \
702 rm -f $@; \
703 /bin/false; \
1da177e4
LT
704 fi;
705 $(verify_kallsyms)
706endef
707
708
709ifdef CONFIG_KALLSYMS
710# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
711# It's a three stage process:
712# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
713# empty
714# Running kallsyms on that gives us .tmp_kallsyms1.o with
715# the right size - vmlinux version (uname -v) is updated during this step
716# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
717# but due to the added section, some addresses have shifted.
718# From here, we generate a correct .tmp_kallsyms2.o
719# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
720# o Verify that the System.map from vmlinux matches the map from
721# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
722# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
723# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
724# temporary bypass to allow the kernel to be built while the
725# maintainers work out what went wrong with kallsyms.
726
727ifdef CONFIG_KALLSYMS_EXTRA_PASS
728last_kallsyms := 3
729else
730last_kallsyms := 2
731endif
732
733kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
734
735define verify_kallsyms
4635281c
SR
736 $(Q)$(if $($(quiet)cmd_sysmap), \
737 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
1da177e4 738 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
4635281c
SR
739 $(Q)cmp -s System.map .tmp_System.map || \
740 (echo Inconsistent kallsyms data; \
741 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
1da177e4
LT
742 rm .tmp_kallsyms* ; /bin/false )
743endef
744
745# Update vmlinux version before link
746# Use + in front of this rule to silent warning about make -j1
72ba47c1 747# First command is ':' to allow us to use + in front of this rule
1da177e4
LT
748cmd_ksym_ld = $(cmd_vmlinux__)
749define rule_ksym_ld
72ba47c1 750 :
1da177e4
LT
751 +$(call cmd,vmlinux_version)
752 $(call cmd,vmlinux__)
753 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
754endef
755
756# Generate .S file with all kernel symbols
757quiet_cmd_kallsyms = KSYM $@
758 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
759 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
760
761.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
762 $(call if_changed_dep,as_o_S)
763
764.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
765 $(call cmd,kallsyms)
766
767# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
768.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
769 $(call if_changed_rule,ksym_ld)
770
771.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
772 $(call if_changed,vmlinux__)
773
774.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
775 $(call if_changed,vmlinux__)
776
777# Needs to visit scripts/ before $(KALLSYMS) can be used.
778$(KALLSYMS): scripts ;
779
33bc25ea
SR
780# Generate some data for debugging strange kallsyms problems
781debug_kallsyms: .tmp_map$(last_kallsyms)
782
783.tmp_map%: .tmp_vmlinux% FORCE
784 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
785
786.tmp_map3: .tmp_map2
787
788.tmp_map2: .tmp_map1
789
1da177e4
LT
790endif # ifdef CONFIG_KALLSYMS
791
741f98fe
SR
792# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
793# relevant sections renamed as per the linker script.
794quiet_cmd_vmlinux-modpost = LD $@
795 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
796 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
797 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
798define rule_vmlinux-modpost
799 :
800 +$(call cmd,vmlinux-modpost)
801 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
802 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
803endef
804
1da177e4 805# vmlinux image - including updated kernel symbols
310f8243 806vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
0f836e5f 807ifdef CONFIG_HEADERS_CHECK
0e7af8d0 808 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025
MD
809endif
810ifdef CONFIG_SAMPLES
811 $(Q)$(MAKE) $(build)=samples
0f836e5f 812endif
741f98fe 813 $(call vmlinux-modpost)
1da177e4 814 $(call if_changed_rule,vmlinux__)
4e25d8bb 815 $(Q)rm -f .old_version
1da177e4 816
310f8243 817# build vmlinux.o first to catch section mismatch errors early
cf87dcd1
SR
818ifdef CONFIG_KALLSYMS
819.tmp_vmlinux1: vmlinux.o
820endif
310f8243 821vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE
741f98fe
SR
822 $(call if_changed_rule,vmlinux-modpost)
823
1da177e4
LT
824# The actual objects are generated when descending,
825# make sure no implicit rule kicks in
826$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
827
828# Handle descending into subdirectories listed in $(vmlinux-dirs)
829# Preset locale variables to speed up the build process. Limit locale
830# tweaks to this spot to avoid wrong language settings when running
831# make menuconfig etc.
832# Error messages still appears in the original language
833
4f193362 834PHONY += $(vmlinux-dirs)
5bb78269 835$(vmlinux-dirs): prepare scripts
1da177e4
LT
836 $(Q)$(MAKE) $(build)=$@
837
cb58455c 838# Build the kernel release string
cb58455c 839#
1ef98856
RD
840# The KERNELRELEASE value built here is stored in the file
841# include/config/kernel.release, and is used when executing several
842# make targets, such as "make install" or "make modules_install."
843#
844# The eventual kernel release string consists of the following fields,
845# shown in a hierarchical format to show how smaller parts are concatenated
846# to form the larger and final value, with values coming from places like
847# the Makefile, kernel config options, make command line options and/or
848# SCM tag information.
849#
850# $(KERNELVERSION)
851# $(VERSION) eg, 2
852# $(PATCHLEVEL) eg, 6
853# $(SUBLEVEL) eg, 18
854# $(EXTRAVERSION) eg, -rc6
855# $(localver-full)
856# $(localver)
76c32956 857# localversion* (files without backups, containing '~')
1ef98856
RD
858# $(CONFIG_LOCALVERSION) (from kernel config setting)
859# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
860# ./scripts/setlocalversion (SCM tag, if one exists)
861# $(LOCALVERSION) (from make command line if provided)
862#
863# Note how the final $(localver-auto) string is included *only* if the
864# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
865# moment, only git is supported but other SCMs can edit the script
866# scripts/setlocalversion and add the appropriate checks as needed.
cb58455c 867
76c32956
OV
868pattern = ".*/localversion[^~]*"
869string = $(shell cat /dev/null \
fd19e44f 870 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
cb58455c 871
76c32956
OV
872localver = $(subst $(space),, $(string) \
873 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
070b98bf 874
cb58455c
SR
875# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
876# and if the SCM is know a tag from the SCM is appended.
070b98bf 877# The appended tag is determined by the SCM used.
cb58455c
SR
878#
879# Currently, only git is supported.
880# Other SCMs can edit scripts/setlocalversion and add the appropriate
881# checks as needed.
882ifdef CONFIG_LOCALVERSION_AUTO
883 _localver-auto = $(shell $(CONFIG_SHELL) \
884 $(srctree)/scripts/setlocalversion $(srctree))
885 localver-auto = $(LOCALVERSION)$(_localver-auto)
886endif
887
888localver-full = $(localver)$(localver-auto)
889
f1d28fb0 890# Store (new) KERNELRELASE string in include/config/kernel.release
2244cbd8 891kernelrelease = $(KERNELVERSION)$(localver-full)
f1d28fb0 892include/config/kernel.release: include/config/auto.conf FORCE
2244cbd8
SR
893 $(Q)rm -f $@
894 $(Q)echo $(kernelrelease) > $@
cb58455c
SR
895
896
1da177e4 897# Things we need to do before we recursively start building the kernel
5bb78269
SR
898# or the modules are listed in "prepare".
899# A multi level approach is used. prepareN is processed before prepareN-1.
900# archprepare is used in arch Makefiles and when processed asm symlink,
901# version.h and scripts_basic is processed / created.
1da177e4 902
5bb78269 903# Listed in dependency order
4f193362 904PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 905
86feeaa8 906# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
907# and if so do:
908# 1) Check that make has not been executed in the kernel src $(srctree)
909# 2) Create the include2 directory, used for the second asm symlink
f1d28fb0 910prepare3: include/config/kernel.release
1da177e4
LT
911ifneq ($(KBUILD_SRC),)
912 @echo ' Using $(srctree) as source for kernel'
c955ccaf 913 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1da177e4
LT
914 echo " $(srctree) is not clean, please run 'make mrproper'";\
915 echo " in the '$(srctree)' directory.";\
916 /bin/false; \
917 fi;
918 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
96a388de 919 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
1da177e4
LT
920endif
921
86feeaa8
SR
922# prepare2 creates a makefile if using a separate output directory
923prepare2: prepare3 outputmakefile
1da177e4 924
3eb3c740
RZ
925prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
926 include/asm include/config/auto.conf
7bb9d092 927 $(cmd_crmodverdir)
1da177e4 928
5bb78269
SR
929archprepare: prepare1 scripts_basic
930
931prepare0: archprepare FORCE
8d36a623 932 $(Q)$(MAKE) $(build)=.
c53aeca0 933 $(Q)$(MAKE) $(build)=. missing-syscalls
86feeaa8 934
1da177e4 935# All the preparing..
d395efb5 936prepare: prepare0
1da177e4 937
070b98bf
SR
938# Leave this as default for preprocessing vmlinux.lds.S, which is now
939# done in arch/$(ARCH)/kernel/Makefile
1da177e4
LT
940
941export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
942
fc333b2d
SR
943# The asm symlink changes when $(ARCH) changes.
944# Detect this and ask user to run make mrproper
945
946include/asm: FORCE
947 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
948 if [ -L include/asm ]; then \
949 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
950 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
951 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
952 exit 1; \
953 fi; \
954 else \
955 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
956 if [ ! -d include ]; then \
957 mkdir -p include; \
958 fi; \
959 ln -fsn asm-$(SRCARCH) $@; \
960 fi
1da177e4 961
1da177e4
LT
962# Generate some files
963# ---------------------------------------------------------------------------
964
965# KERNELRELEASE can change from a few different places, meaning version.h
966# needs to be updated, so this check is forced on all builds
967
968uts_len := 64
63104eec
SR
969define filechk_utsrelease.h
970 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
971 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
972 exit 1; \
973 fi; \
974 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
975endef
1da177e4
LT
976
977define filechk_version.h
63104eec
SR
978 (echo \#define LINUX_VERSION_CODE $(shell \
979 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
980 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
981endef
982
63104eec 983include/linux/version.h: $(srctree)/Makefile FORCE
1da177e4
LT
984 $(call filechk,version.h)
985
63104eec
SR
986include/linux/utsrelease.h: include/config/kernel.release FORCE
987 $(call filechk,utsrelease.h)
988
1da177e4
LT
989# ---------------------------------------------------------------------------
990
4f193362 991PHONY += depend dep
1da177e4
LT
992depend dep:
993 @echo '*** Warning: make $@ is unnecessary now.'
994
8d730cfb
DW
995# ---------------------------------------------------------------------------
996# Kernel headers
1ab7a1f3 997INSTALL_HDR_PATH=$(objtree)/usr
8d730cfb
DW
998export INSTALL_HDR_PATH
999
96a388de
TG
1000HDRFILTER=generic i386 x86_64
1001HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
6d716275
DW
1002
1003PHONY += headers_install_all
3eb3c740 1004headers_install_all: include/linux/version.h scripts_basic FORCE
398477d4 1005 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
6d716275 1006 $(Q)for arch in $(HDRARCHES); do \
398477d4 1007 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
6d716275
DW
1008 done
1009
8d730cfb 1010PHONY += headers_install
3eb3c740 1011headers_install: include/linux/version.h scripts_basic FORCE
96a388de
TG
1012 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1013 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
f17b7bad 1014 exit 1 ; fi
07aea3a7 1015 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
96a388de 1016 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
8d730cfb 1017
1f85712e
MF
1018PHONY += headers_check_all
1019headers_check_all: headers_install_all
1020 $(Q)for arch in $(HDRARCHES); do \
1021 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1022 done
1023
68475359
DW
1024PHONY += headers_check
1025headers_check: headers_install
96a388de 1026 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
68475359 1027
1da177e4
LT
1028# ---------------------------------------------------------------------------
1029# Modules
1030
1031ifdef CONFIG_MODULES
1032
070b98bf 1033# By default, build modules as well
1da177e4
LT
1034
1035all: modules
1036
1037# Build modules
551559e1
TH
1038#
1039# A module can be listed more than once in obj-m resulting in
1040# duplicate lines in modules.order files. Those are removed
1041# using awk while concatenating to the final file.
1da177e4 1042
4f193362 1043PHONY += modules
1da177e4 1044modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
551559e1 1045 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1da177e4 1046 @echo ' Building modules, stage 2.';
b805aa0e 1047 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4
LT
1048
1049
1050# Target to prepare building external modules
4f193362 1051PHONY += modules_prepare
5bb78269 1052modules_prepare: prepare scripts
1da177e4
LT
1053
1054# Target to install modules
4f193362 1055PHONY += modules_install
1da177e4
LT
1056modules_install: _modinst_ _modinst_post
1057
4f193362 1058PHONY += _modinst_
1da177e4 1059_modinst_:
ce454d4d 1060 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1da177e4
LT
1061 echo "Warning: you may need to install module-init-tools"; \
1062 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1063 sleep 1; \
1064 fi
1065 @rm -rf $(MODLIB)/kernel
1066 @rm -f $(MODLIB)/source
1067 @mkdir -p $(MODLIB)/kernel
1068 @ln -s $(srctree) $(MODLIB)/source
1069 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1070 rm -f $(MODLIB)/build ; \
1071 ln -s $(objtree) $(MODLIB)/build ; \
1072 fi
551559e1 1073 @cp -f $(objtree)/modules.order $(MODLIB)/
b805aa0e 1074 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1075
50a8ec31 1076# This depmod is only for convenience to give the initial
1da177e4
LT
1077# boot a modules.dep even before / is mounted read-write. However the
1078# boot script depmod is the master version.
4f193362 1079PHONY += _modinst_post
1da177e4 1080_modinst_post: _modinst_
50a8ec31 1081 $(call cmd,depmod)
1da177e4
LT
1082
1083else # CONFIG_MODULES
1084
1085# Modules not configured
1086# ---------------------------------------------------------------------------
1087
1088modules modules_install: FORCE
1089 @echo
1090 @echo "The present kernel configuration has modules disabled."
1091 @echo "Type 'make config' and enable loadable module support."
1092 @echo "Then build a kernel with module support enabled."
1093 @echo
1094 @exit 1
1095
1096endif # CONFIG_MODULES
1097
1da177e4
LT
1098###
1099# Cleaning is done on three levels.
1100# make clean Delete most generated files
1101# Leave enough to build external modules
1102# make mrproper Delete the current configuration, and all generated files
1103# make distclean Remove editor backup files, patch leftover files and the like
1104
1105# Directories & files removed with 'make clean'
1106CLEAN_DIRS += $(MODVERDIR)
1107CLEAN_FILES += vmlinux System.map \
1108 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1109
1110# Directories & files removed with 'make mrproper'
1ab7a1f3 1111MRPROPER_DIRS += include/config include2 usr/include
50aa88e2 1112MRPROPER_FILES += .config .config.old include/asm .version .old_version \
3eb3c740
RZ
1113 include/linux/autoconf.h include/linux/version.h \
1114 include/linux/utsrelease.h \
f1d28fb0 1115 Module.symvers tags TAGS cscope*
1da177e4
LT
1116
1117# clean - Delete most, but leave enough to build external modules
1118#
1119clean: rm-dirs := $(CLEAN_DIRS)
1120clean: rm-files := $(CLEAN_FILES)
86feeaa8 1121clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1da177e4 1122
4f193362 1123PHONY += $(clean-dirs) clean archclean
1da177e4
LT
1124$(clean-dirs):
1125 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1126
1127clean: archclean $(clean-dirs)
1128 $(call cmd,rmdirs)
1129 $(call cmd,rmfiles)
1130 @find . $(RCS_FIND_IGNORE) \
070b98bf 1131 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
15fde675 1132 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
551559e1 1133 -o -name '*.symtypes' -o -name 'modules.order' \) \
1da177e4
LT
1134 -type f -print | xargs rm -f
1135
1136# mrproper - Delete all generated files, including .config
1137#
1138mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1139mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1140mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1141
4f193362 1142PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1143$(mrproper-dirs):
1144 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1145
1146mrproper: clean archmrproper $(mrproper-dirs)
1147 $(call cmd,rmdirs)
1148 $(call cmd,rmfiles)
1149
1150# distclean
1151#
4f193362 1152PHONY += distclean
1da177e4
LT
1153
1154distclean: mrproper
1155 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1156 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1157 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
070b98bf 1158 -o -name '.*.rej' -o -size 0 \
1da177e4
LT
1159 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1160 -type f -print | xargs rm -f
1161
1162
1163# Packaging of the kernel to various formats
1164# ---------------------------------------------------------------------------
1165# rpm target kept for backward compatibility
1166package-dir := $(srctree)/scripts/package
1167
031ecc6d 1168%pkg: include/config/kernel.release FORCE
6c2133e1 1169 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1170rpm: include/config/kernel.release FORCE
6c2133e1 1171 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1172
1173
1174# Brief documentation of the typical targets used
1175# ---------------------------------------------------------------------------
1176
1177boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1178boards := $(notdir $(boards))
1179
1180help:
1181 @echo 'Cleaning targets:'
5ea084ef 1182 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1183 @echo ' enough build support to build external modules'
5ea084ef 1184 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1185 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1186 @echo ''
1187 @echo 'Configuration targets:'
1188 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1189 @echo ''
1190 @echo 'Other generic targets:'
1191 @echo ' all - Build all targets marked with [*]'
1192 @echo '* vmlinux - Build the bare kernel'
1193 @echo '* modules - Build all modules'
9cc5d74c 1194 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1da177e4
LT
1195 @echo ' dir/ - Build all files in dir and below'
1196 @echo ' dir/file.[ois] - Build specified target only'
155ad605 1197 @echo ' dir/file.ko - Build module including final link'
243f40ce 1198 @echo ' prepare - Set up for building external modules'
1da177e4
LT
1199 @echo ' tags/TAGS - Generate tags file for editors'
1200 @echo ' cscope - Generate cscope index'
6d128842 1201 @echo ' kernelrelease - Output the release version string'
cb58455c 1202 @echo ' kernelversion - Output the version stored in Makefile'
91e034ef 1203 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
f17b7bad 1204 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1205 echo ' (default: $(INSTALL_HDR_PATH))'; \
f17b7bad 1206 fi
1da177e4
LT
1207 @echo ''
1208 @echo 'Static analysers'
1da177e4
LT
1209 @echo ' checkstack - Generate a list of stack hogs'
1210 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1211 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1212 @echo ' includecheck - Check for duplicate included header files'
295ac051 1213 @echo ' export_report - List the usages of all exported symbols'
91e034ef 1214 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
f17b7bad
DW
1215 echo ' headers_check - Sanity check on exported headers'; \
1216 fi
1da177e4
LT
1217 @echo ''
1218 @echo 'Kernel packaging:'
6c2133e1 1219 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1220 @echo ''
1221 @echo 'Documentation targets:'
1222 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1223 @echo ''
1224 @echo 'Architecture specific targets ($(ARCH)):'
1225 @$(if $(archhelp),$(archhelp),\
1226 echo ' No architecture specific help defined for $(ARCH)')
1227 @echo ''
1228 @$(if $(boards), \
1229 $(foreach b, $(boards), \
1230 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1231 echo '')
1232
1233 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1234 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1235 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1236 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1237 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1da177e4
LT
1238 @echo ''
1239 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1240 @echo 'For further info see the ./README file'
1241
1242
1243# Documentation targets
1244# ---------------------------------------------------------------------------
1245%docs: scripts_basic FORCE
1246 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1247
1248else # KBUILD_EXTMOD
1249
1250###
1251# External module support.
1252# When building external modules the kernel used as basis is considered
1253# read-only, and no consistency checks are made and the make
1254# system is not used on the basis kernel. If updates are required
1255# in the basis kernel ordinary make commands (without M=...) must
1256# be used.
1257#
1258# The following are the only valid targets when building external
1259# modules.
1260# make M=dir clean Delete all automatically generated files
1261# make M=dir modules Make all modules in specified dir
1262# make M=dir Same as 'make M=dir modules'
1263# make M=dir modules_install
070b98bf 1264# Install the modules built in the module directory
1da177e4
LT
1265# Assumes install directory is already created
1266
1267# We are always building modules
1268KBUILD_MODULES := 1
4f193362 1269PHONY += crmodverdir
1da177e4 1270crmodverdir:
7bb9d092 1271 $(cmd_crmodverdir)
1da177e4 1272
4f193362 1273PHONY += $(objtree)/Module.symvers
1da177e4
LT
1274$(objtree)/Module.symvers:
1275 @test -e $(objtree)/Module.symvers || ( \
1276 echo; \
1277 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1278 echo " is missing; modules will have no dependencies and modversions."; \
1279 echo )
1280
1281module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1282PHONY += $(module-dirs) modules
1da177e4
LT
1283$(module-dirs): crmodverdir $(objtree)/Module.symvers
1284 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1285
1286modules: $(module-dirs)
1287 @echo ' Building modules, stage 2.';
b805aa0e 1288 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1289
4f193362 1290PHONY += modules_install
a67dc21a 1291modules_install: _emodinst_ _emodinst_post
e6304663 1292
4f193362
PS
1293install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1294PHONY += _emodinst_
a67dc21a 1295_emodinst_:
a67dc21a 1296 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1297 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1298
4f193362 1299PHONY += _emodinst_post
a67dc21a
SR
1300_emodinst_post: _emodinst_
1301 $(call cmd,depmod)
1302
1da177e4
LT
1303clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1304
4f193362 1305PHONY += $(clean-dirs) clean
1da177e4
LT
1306$(clean-dirs):
1307 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1308
1309clean: rm-dirs := $(MODVERDIR)
c34114f4 1310clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1da177e4
LT
1311clean: $(clean-dirs)
1312 $(call cmd,rmdirs)
c34114f4 1313 $(call cmd,rmfiles)
1da177e4 1314 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
070b98bf 1315 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1da177e4
LT
1316 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1317 -type f -print | xargs rm -f
1318
1319help:
1320 @echo ' Building external modules.'
1321 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1322 @echo ''
1323 @echo ' modules - default target, build the module(s)'
1324 @echo ' modules_install - install the module'
1325 @echo ' clean - remove generated files in module directory only'
1326 @echo ''
06300b21
SR
1327
1328# Dummies...
4f193362 1329PHONY += prepare scripts
06300b21
SR
1330prepare: ;
1331scripts: ;
1da177e4
LT
1332endif # KBUILD_EXTMOD
1333
1334# Generate tags for editors
1335# ---------------------------------------------------------------------------
1336
1337#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1338#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1339#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1340
f182ae62 1341ifeq ($(src),$(obj))
1da177e4
LT
1342__srctree =
1343else
1344__srctree = $(srctree)/
1345endif
1346
2ab23c95
PBG
1347ifeq ($(ALLSOURCE_ARCHS),)
1348ifeq ($(ARCH),um)
1349ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1350else
2eb4c950 1351ALLINCLUDE_ARCHS := $(SRCARCH)
2ab23c95
PBG
1352endif
1353else
d384e35a 1354#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
2ab23c95
PBG
1355ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1356endif
1357
d0974b11 1358ALLSOURCE_ARCHS := $(SRCARCH)
a0674e88 1359
e838db68 1360define find-sources
f8bea58b
YL
1361 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1362 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
e838db68 1363 -name $1 -print; \
a0674e88 1364 done ; \
1da177e4 1365 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
e838db68 1366 -name $1 -print; \
1da177e4
LT
1367 find $(__srctree)include $(RCS_FIND_IGNORE) \
1368 \( -name config -o -name 'asm-*' \) -prune \
e838db68 1369 -o -name $1 -print; \
f8bea58b
YL
1370 for arch in $(ALLINCLUDE_ARCHS) ; do \
1371 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
e838db68 1372 -name $1 -print; \
a0674e88 1373 done ; \
1da177e4 1374 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
dd7e54ad
DM
1375 -name $1 -print; \
1376 find $(__srctree) $(RCS_FIND_IGNORE) \
37ab7a26 1377 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
dd7e54ad
DM
1378 -name $1 -print; \
1379 )
e838db68
MY
1380endef
1381
1382define all-sources
1383 $(call find-sources,'*.[chS]')
1384endef
1385define all-kconfigs
1386 $(call find-sources,'Kconfig*')
1387endef
1388define all-defconfigs
1389 $(call find-sources,'defconfig')
1da177e4
LT
1390endef
1391
da7c0408
AG
1392define xtags
1393 if $1 --version 2>&1 | grep -iq exuberant; then \
1394 $(all-sources) | xargs $1 -a \
1395 -I __initdata,__exitdata,__acquires,__releases \
2c81210a 1396 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
da7c0408 1397 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
91b943ee 1398 --extra=+f --c-kinds=+px \
a412c172 1399 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
da7c0408
AG
1400 $(all-kconfigs) | xargs $1 -a \
1401 --langdef=kconfig \
1402 --language-force=kconfig \
80ff2624 1403 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
18e39913 1404 $(all-defconfigs) | xargs -r $1 -a \
da7c0408
AG
1405 --langdef=dotconfig \
1406 --language-force=dotconfig \
1407 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1408 elif $1 --version 2>&1 | grep -iq emacs; then \
1409 $(all-sources) | xargs $1 -a; \
1410 $(all-kconfigs) | xargs $1 -a \
80ff2624 1411 --regex='/^[ \t]*(menu|)config[ \t]+\([a-zA-Z0-9_]+\)/\2/'; \
18e39913 1412 $(all-defconfigs) | xargs -r $1 -a \
da7c0408
AG
1413 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1414 else \
1415 $(all-sources) | xargs $1 -a; \
1416 fi
1417endef
1418
1da177e4 1419quiet_cmd_cscope-file = FILELST cscope.files
acbef459 1420 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1da177e4
LT
1421
1422quiet_cmd_cscope = MAKE cscope.out
acbef459 1423 cmd_cscope = cscope -b
1da177e4
LT
1424
1425cscope: FORCE
1426 $(call cmd,cscope-file)
1427 $(call cmd,cscope)
1428
1429quiet_cmd_TAGS = MAKE $@
66d609ec
SR
1430define cmd_TAGS
1431 rm -f $@; \
da7c0408 1432 $(call xtags,etags)
66d609ec
SR
1433endef
1434
1435TAGS: FORCE
1436 $(call cmd,TAGS)
1da177e4 1437
1da177e4
LT
1438quiet_cmd_tags = MAKE $@
1439define cmd_tags
1440 rm -f $@; \
da7c0408 1441 $(call xtags,ctags)
1da177e4
LT
1442endef
1443
1da177e4
LT
1444tags: FORCE
1445 $(call cmd,tags)
1446
1447
1448# Scripts to check various things for consistency
1449# ---------------------------------------------------------------------------
1450
1da177e4
LT
1451includecheck:
1452 find * $(RCS_FIND_IGNORE) \
1453 -name '*.[hcS]' -type f -print | sort \
80007434 1454 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1455
1456versioncheck:
1457 find * $(RCS_FIND_IGNORE) \
1458 -name '*.[hcS]' -type f -print | sort \
80007434 1459 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1460
1da177e4
LT
1461namespacecheck:
1462 $(PERL) $(srctree)/scripts/namespace.pl
1463
295ac051
AB
1464export_report:
1465 $(PERL) $(srctree)/scripts/export_report.pl
1466
1da177e4
LT
1467endif #ifeq ($(config-targets),1)
1468endif #ifeq ($(mixed-targets),1)
1469
c30a02e0 1470PHONY += checkstack kernelrelease kernelversion
e3ccf6e3 1471
011e3a9a
JD
1472# UML needs a little special treatment here. It wants to use the host
1473# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1474# else wants $(ARCH), including people doing cross-builds, which means
1475# that $(SUBARCH) doesn't work here.
1476ifeq ($(ARCH), um)
1477CHECKSTACK_ARCH := $(SUBARCH)
1478else
1479CHECKSTACK_ARCH := $(ARCH)
1480endif
1da177e4
LT
1481checkstack:
1482 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1483 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4
LT
1484
1485kernelrelease:
f1d28fb0
RZ
1486 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1487 $(error kernelrelease not valid - run 'make prepare' to update it))
cb58455c 1488kernelversion:
2244cbd8 1489 @echo $(KERNELVERSION)
1da177e4 1490
06300b21
SR
1491# Single targets
1492# ---------------------------------------------------------------------------
bc2546a6 1493# Single targets are compatible with:
e1b8513d 1494# - build with mixed source and output
bc2546a6
SR
1495# - build with separate output dir 'make O=...'
1496# - external modules
1497#
1498# target-dir => where to store outputfile
1499# build-dir => directory in kernel source tree to use
1500
1501ifeq ($(KBUILD_EXTMOD),)
aa360879 1502 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1503 target-dir = $(dir $@)
1504else
1505 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1506 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1507 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1508endif
1509
f6ecebd6 1510%.s: %.c prepare scripts FORCE
bc2546a6 1511 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1512%.i: %.c prepare scripts FORCE
bc2546a6 1513 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1514%.o: %.c prepare scripts FORCE
bc2546a6 1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1516%.lst: %.c prepare scripts FORCE
bc2546a6 1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1518%.s: %.S prepare scripts FORCE
bc2546a6 1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1520%.o: %.S prepare scripts FORCE
bc2546a6 1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1522%.symtypes: %.c prepare scripts FORCE
1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1524
bc2546a6
SR
1525# Modules
1526/ %/: prepare scripts FORCE
7bb9d092 1527 $(cmd_crmodverdir)
06300b21 1528 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1529 $(build)=$(build-dir)
1530%.ko: prepare scripts FORCE
7bb9d092 1531 $(cmd_crmodverdir)
06300b21 1532 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1533 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1534 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1535
1da177e4
LT
1536# FIXME Should go into a make.lib or something
1537# ===========================================================================
1538
1539quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1540 cmd_rmdirs = rm -rf $(rm-dirs)
1541
1542quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1543 cmd_rmfiles = rm -f $(rm-files)
1544
bc3c26fe 1545# Run depmod only if we have System.map and depmod is executable
50a8ec31
SR
1546quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1547 cmd_depmod = \
d8d2e78a 1548 if [ -r System.map -a -x $(DEPMOD) ]; then \
50a8ec31
SR
1549 $(DEPMOD) -ae -F System.map \
1550 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1551 $(KERNELRELEASE); \
1552 fi
1553
7bb9d092 1554# Create temporary dir for module support files
ab19f879
SR
1555# clean it up only when building all modules
1556cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1557 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1da177e4 1558
222d394d 1559a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
06c5040c 1560 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
5e8d780d 1561 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1da177e4
LT
1562
1563quiet_cmd_as_o_S = AS $@
1564cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1565
1566# read all saved command lines
1567
1568targets := $(wildcard $(sort $(targets)))
1569cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1570
1571ifneq ($(cmd_files),)
1572 $(cmd_files): ; # Do not try to update included dependency files
1573 include $(cmd_files)
1574endif
1575
1da177e4
LT
1576# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1577# Usage:
1578# $(Q)$(MAKE) $(clean)=dir
1579clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1580
1da177e4
LT
1581endif # skip-makefile
1582
4f193362 1583PHONY += FORCE
1da177e4 1584FORCE:
4f193362 1585
4f193362
PS
1586# Declare the contents of the .PHONY variable as phony. We keep that
1587# information in a variable se we can use it in if_changed and friends.
1588.PHONY: $(PHONY)