Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1VERSION = 2
2PATCHLEVEL = 6
3SUBLEVEL = 16
4EXTRAVERSION =
5NAME=Sliding Snow Leopard
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
13# Do not print "Entering directory ..."
14MAKEFLAGS += --no-print-directory
15
16# We are using a recursive build, so we need to do a little thinking
17# to get the ordering right.
18#
19# Most importantly: sub-Makefiles should only ever modify files in
20# their own directory. If in some directory we have a dependency on
21# a file in another dir (which doesn't happen often, but it's often
22# unavoidable when linking the built-in.o targets which finally
23# turn into vmlinux), we will call a sub make in that other dir, and
24# after that we are sure that everything which is in that other dir
25# is now up to date.
26#
27# The only cases where we need to modify files which have global
28# effects are thus separated out and done before the recursive
29# descending is started. They are now explicitly listed as the
30# prepare rule.
31
32# To put more focus on warnings, be less verbose as default
33# Use 'make V=1' to see the full commands
34
35ifdef V
36 ifeq ("$(origin V)", "command line")
37 KBUILD_VERBOSE = $(V)
38 endif
39endif
40ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42endif
43
44# Call sparse as part of compilation of C files
45# Use 'make C=1' to enable sparse checking
46
47ifdef C
48 ifeq ("$(origin C)", "command line")
49 KBUILD_CHECKSRC = $(C)
50 endif
51endif
52ifndef KBUILD_CHECKSRC
53 KBUILD_CHECKSRC = 0
54endif
55
56# Use make M=dir to specify directory of external module to build
57# Old syntax make ... SUBDIRS=$PWD is still supported
58# Setting the environment variable KBUILD_EXTMOD take precedence
59ifdef SUBDIRS
60 KBUILD_EXTMOD ?= $(SUBDIRS)
61endif
62ifdef M
63 ifeq ("$(origin M)", "command line")
64 KBUILD_EXTMOD := $(M)
65 endif
66endif
67
68
69# kbuild supports saving output files in a separate directory.
70# To locate output files in a separate directory two syntaxes are supported.
71# In both cases the working directory must be the root of the kernel src.
72# 1) O=
73# Use "make O=dir/to/store/output/files/"
74#
75# 2) Set KBUILD_OUTPUT
76# Set the environment variable KBUILD_OUTPUT to point to the directory
77# where the output files shall be placed.
78# export KBUILD_OUTPUT=dir/to/store/output/files/
79# make
80#
81# The O= assignment takes precedence over the KBUILD_OUTPUT environment
82# variable.
83
84
85# KBUILD_SRC is set on invocation of make in OBJ directory
86# KBUILD_SRC is not intended to be used by the regular user (for now)
87ifeq ($(KBUILD_SRC),)
88
89# OK, Make called in directory where kernel src resides
90# Do we want to locate output files in a separate directory?
91ifdef O
92 ifeq ("$(origin O)", "command line")
93 KBUILD_OUTPUT := $(O)
94 endif
95endif
96
97# That's our default target when none is given on the command line
98.PHONY: _all
99_all:
100
101ifneq ($(KBUILD_OUTPUT),)
102# Invoke a second make in the output directory, passing relevant variables
103# check that the output directory actually exists
104saved-output := $(KBUILD_OUTPUT)
105KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
106$(if $(KBUILD_OUTPUT),, \
107 $(error output directory "$(saved-output)" does not exist))
108
109.PHONY: $(MAKECMDGOALS)
110
111$(filter-out _all,$(MAKECMDGOALS)) _all:
112 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
113 KBUILD_SRC=$(CURDIR) \
114 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
115
116# Leave processing to above invocation of make
117skip-makefile := 1
118endif # ifneq ($(KBUILD_OUTPUT),)
119endif # ifeq ($(KBUILD_SRC),)
120
121# We process the rest of the Makefile if this is the final invocation of make
122ifeq ($(skip-makefile),)
123
124# If building an external module we do not care about the all: rule
125# but instead _all depend on modules
126.PHONY: all
127ifeq ($(KBUILD_EXTMOD),)
128_all: all
129else
130_all: modules
131endif
132
133srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
134TOPDIR := $(srctree)
135# FIXME - TOPDIR is obsolete, use srctree/objtree
136objtree := $(CURDIR)
137src := $(srctree)
138obj := $(objtree)
139
140VPATH := $(srctree)
141
142export srctree objtree VPATH TOPDIR
143
144
145# SUBARCH tells the usermode build what the underlying arch is. That is set
146# first, and if a usermode build is happening, the "ARCH=um" on the command
147# line overrides the setting of ARCH below. If a native build is happening,
148# then ARCH is assigned, getting whatever value it gets normally, and
149# SUBARCH is subsequently ignored.
150
151SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
152 -e s/arm.*/arm/ -e s/sa110/arm/ \
153 -e s/s390x/s390/ -e s/parisc64/parisc/ \
154 -e s/ppc.*/powerpc/ )
155
156# Cross compiling and selecting different set of gcc/bin-utils
157# ---------------------------------------------------------------------------
158#
159# When performing cross compilation for other architectures ARCH shall be set
160# to the target architecture. (See arch/* for the possibilities).
161# ARCH can be set during invocation of make:
162# make ARCH=ia64
163# Another way is to have ARCH set in the environment.
164# The default ARCH is the host where make is executed.
165
166# CROSS_COMPILE specify the prefix used for all executables used
167# during compilation. Only gcc and related bin-utils executables
168# are prefixed with $(CROSS_COMPILE).
169# CROSS_COMPILE can be set on the command line
170# make CROSS_COMPILE=ia64-linux-
171# Alternatively CROSS_COMPILE can be set in the environment.
172# Default value for CROSS_COMPILE is not to prefix executables
173# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
174
175ARCH ?= $(SUBARCH)
176CROSS_COMPILE ?=
177
178# Architecture as present in compile.h
179UTS_MACHINE := $(ARCH)
180
181# SHELL used by kbuild
182CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
183 else if [ -x /bin/bash ]; then echo /bin/bash; \
184 else echo sh; fi ; fi)
185
186HOSTCC = gcc
187HOSTCXX = g++
188HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
189HOSTCXXFLAGS = -O2
190
191# Decide whether to build built-in, modular, or both.
192# Normally, just do built-in.
193
194KBUILD_MODULES :=
195KBUILD_BUILTIN := 1
196
197# If we have only "make modules", don't compile built-in objects.
198# When we're building modules with modversions, we need to consider
199# the built-in objects during the descend as well, in order to
200# make sure the checksums are uptodate before we record them.
201
202ifeq ($(MAKECMDGOALS),modules)
203 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
204endif
205
206# If we have "make <whatever> modules", compile modules
207# in addition to whatever we do anyway.
208# Just "make" or "make all" shall build modules as well
209
210ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
211 KBUILD_MODULES := 1
212endif
213
214ifeq ($(MAKECMDGOALS),)
215 KBUILD_MODULES := 1
216endif
217
218export KBUILD_MODULES KBUILD_BUILTIN
219export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
220
221# Beautify output
222# ---------------------------------------------------------------------------
223#
224# Normally, we echo the whole command before executing it. By making
225# that echo $($(quiet)$(cmd)), we now have the possibility to set
226# $(quiet) to choose other forms of output instead, e.g.
227#
228# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
229# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
230#
231# If $(quiet) is empty, the whole command will be printed.
232# If it is set to "quiet_", only the short version will be printed.
233# If it is set to "silent_", nothing wil be printed at all, since
234# the variable $(silent_cmd_cc_o_c) doesn't exist.
235#
236# A simple variant is to prefix commands with $(Q) - that's useful
237# for commands that shall be hidden in non-verbose mode.
238#
239# $(Q)ln $@ :<
240#
241# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
242# If KBUILD_VERBOSE equals 1 then the above command is displayed.
243
244ifeq ($(KBUILD_VERBOSE),1)
245 quiet =
246 Q =
247else
248 quiet=quiet_
249 Q = @
250endif
251
252# If the user is running make -s (silent mode), suppress echoing of
253# commands
254
255ifneq ($(findstring s,$(MAKEFLAGS)),)
256 quiet=silent_
257endif
258
259export quiet Q KBUILD_VERBOSE
260
261######
262# cc support functions to be used (only) in arch/$(ARCH)/Makefile
263# See documentation in Documentation/kbuild/makefiles.txt
264
265# as-option
266# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
267
268as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
269 -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
270 else echo "$(2)"; fi ;)
271
272# cc-option
273# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
274
275cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
276 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
277
278# cc-option-yn
279# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
280cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
281 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
282
283# cc-option-align
284# Prefix align with either -falign or -malign
285cc-option-align = $(subst -functions=0,,\
286 $(call cc-option,-falign-functions=0,-malign-functions=0))
287
288# cc-version
289# Usage gcc-ver := $(call cc-version $(CC))
290cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
291 $(if $(1), $(1), $(CC)))
292
293
294# Look for make include files relative to root of kernel src
295MAKEFLAGS += --include-dir=$(srctree)
296
297# We need some generic definitions
298include $(srctree)/scripts/Kbuild.include
299
300# For maximum performance (+ possibly random breakage, uncomment
301# the following)
302
303#MAKEFLAGS += -rR
304
305# Make variables (CC, etc...)
306
307AS = $(CROSS_COMPILE)as
308LD = $(CROSS_COMPILE)ld
309CC = $(CROSS_COMPILE)gcc
310CPP = $(CC) -E
311AR = $(CROSS_COMPILE)ar
312NM = $(CROSS_COMPILE)nm
313STRIP = $(CROSS_COMPILE)strip
314OBJCOPY = $(CROSS_COMPILE)objcopy
315OBJDUMP = $(CROSS_COMPILE)objdump
316AWK = awk
317GENKSYMS = scripts/genksyms/genksyms
318DEPMOD = /sbin/depmod
319KALLSYMS = scripts/kallsyms
320PERL = perl
321CHECK = sparse
322
323CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
324MODFLAGS = -DMODULE
325CFLAGS_MODULE = $(MODFLAGS)
326AFLAGS_MODULE = $(MODFLAGS)
327LDFLAGS_MODULE = -r
328CFLAGS_KERNEL =
329AFLAGS_KERNEL =
330
331
332# Use LINUXINCLUDE when you must reference the include/ directory.
333# Needed to be compatible with the O= option
334LINUXINCLUDE := -Iinclude \
335 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
336 -include include/linux/autoconf.h
337
338CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
339
340CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
341 -fno-strict-aliasing -fno-common \
342 -ffreestanding
343AFLAGS := -D__ASSEMBLY__
344
345# Read KERNELRELEASE from .kernelrelease (if it exists)
346KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
347KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
348
349export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
350 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
351 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
352 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
353
354export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
355export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
356export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
357
358# When compiling out-of-tree modules, put MODVERDIR in the module
359# tree rather than in the kernel tree. The kernel tree might
360# even be read-only.
361export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
362
363# Files to ignore in find ... statements
364
365RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
366export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
367
368# ===========================================================================
369# Rules shared between *config targets and build targets
370
371# Basic helpers built in scripts/
372.PHONY: scripts_basic
373scripts_basic:
374 $(Q)$(MAKE) $(build)=scripts/basic
375
376# To avoid any implicit rule to kick in, define an empty command.
377scripts/basic/%: scripts_basic ;
378
379.PHONY: outputmakefile
380# outputmakefile generate a Makefile to be placed in output directory, if
381# using a seperate output directory. This allows convinient use
382# of make in output directory
383outputmakefile:
384 $(Q)if test ! $(srctree) -ef $(objtree); then \
385 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
386 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
387 > $(objtree)/Makefile; \
388 echo ' GEN $(objtree)/Makefile'; \
389 fi
390
391# To make sure we do not include .config for any of the *config targets
392# catch them early, and hand them over to scripts/kconfig/Makefile
393# It is allowed to specify more targets when calling make, including
394# mixing *config targets and build targets.
395# For example 'make oldconfig all'.
396# Detect when mixed targets is specified, and make a second invocation
397# of make so .config is not included in this case either (for *config).
398
399no-dot-config-targets := clean mrproper distclean \
400 cscope TAGS tags help %docs check%
401
402config-targets := 0
403mixed-targets := 0
404dot-config := 1
405
406ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
407 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
408 dot-config := 0
409 endif
410endif
411
412ifeq ($(KBUILD_EXTMOD),)
413 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
414 config-targets := 1
415 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
416 mixed-targets := 1
417 endif
418 endif
419endif
420
421ifeq ($(mixed-targets),1)
422# ===========================================================================
423# We're called with mixed targets (*config and build targets).
424# Handle them one by one.
425
426%:: FORCE
427 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
428
429else
430ifeq ($(config-targets),1)
431# ===========================================================================
432# *config targets only - make sure prerequisites are updated, and descend
433# in scripts/kconfig to make the *config target
434
435# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
436# KBUILD_DEFCONFIG may point out an alternative default configuration
437# used for 'make defconfig'
438include $(srctree)/arch/$(ARCH)/Makefile
439export KBUILD_DEFCONFIG
440
441config %config: scripts_basic outputmakefile FORCE
442 $(Q)mkdir -p include/linux
443 $(Q)$(MAKE) $(build)=scripts/kconfig $@
444 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
445
446else
447# ===========================================================================
448# Build targets only - this includes vmlinux, arch specific targets, clean
449# targets and others. In general all targets except *config targets.
450
451ifeq ($(KBUILD_EXTMOD),)
452# Additional helpers built in scripts/
453# Carefully list dependencies so we do not try to build scripts twice
454# in parrallel
455.PHONY: scripts
456scripts: scripts_basic include/config/MARKER
457 $(Q)$(MAKE) $(build)=$(@)
458
459scripts_basic: include/linux/autoconf.h
460
461# Objects we will link into vmlinux / subdirs we need to visit
462init-y := init/
463drivers-y := drivers/ sound/
464net-y := net/
465libs-y := lib/
466core-y := usr/
467endif # KBUILD_EXTMOD
468
469ifeq ($(dot-config),1)
470# In this section, we need .config
471
472# Read in dependencies to all Kconfig* files, make sure to run
473# oldconfig if changes are detected.
474-include .kconfig.d
475
476include .config
477
478# If .config needs to be updated, it will be done via the dependency
479# that autoconf has on .config.
480# To avoid any implicit rule to kick in, define an empty command
481.config .kconfig.d: ;
482
483# If .config is newer than include/linux/autoconf.h, someone tinkered
484# with it and forgot to run make oldconfig.
485# If kconfig.d is missing then we are probarly in a cleaned tree so
486# we execute the config step to be sure to catch updated Kconfig files
487include/linux/autoconf.h: .kconfig.d .config
488 $(Q)mkdir -p include/linux
489 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
490else
491# Dummy target needed, because used as prerequisite
492include/linux/autoconf.h: ;
493endif
494
495# The all: target is the default when no target is given on the
496# command line.
497# This allow a user to issue only 'make' to build a kernel including modules
498# Defaults vmlinux but it is usually overriden in the arch makefile
499all: vmlinux
500
501ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
502CFLAGS += -Os
503else
504CFLAGS += -O2
505endif
506
507#Add align options if CONFIG_CC_* is not equal to 0
508add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
509CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
510CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
511CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
512CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
513
514ifdef CONFIG_FRAME_POINTER
515CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
516else
517CFLAGS += -fomit-frame-pointer
518endif
519
520ifdef CONFIG_DEBUG_INFO
521CFLAGS += -g
522endif
523
524include $(srctree)/arch/$(ARCH)/Makefile
525
526# arch Makefile may override CC so keep this after arch Makefile is included
527NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
528CHECKFLAGS += $(NOSTDINC_FLAGS)
529
530# warn about C99 declaration after statement
531CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
532
533# disable pointer signedness warnings in gcc 4.0
534CFLAGS += $(call cc-option,-Wno-pointer-sign,)
535
536# Default kernel image to build when no specific target is given.
537# KBUILD_IMAGE may be overruled on the commandline or
538# set in the environment
539# Also any assignments in arch/$(ARCH)/Makefile take precedence over
540# this default value
541export KBUILD_IMAGE ?= vmlinux
542
543#
544# INSTALL_PATH specifies where to place the updated kernel and system map
545# images. Default is /boot, but you can set it to other values
546export INSTALL_PATH ?= /boot
547
548#
549# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
550# relocations required by build roots. This is not defined in the
551# makefile but the arguement can be passed to make if needed.
552#
553
554MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
555export MODLIB
556
557
558ifeq ($(KBUILD_EXTMOD),)
559core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
560
561vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
562 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
563 $(net-y) $(net-m) $(libs-y) $(libs-m)))
564
565vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
566 $(init-n) $(init-) \
567 $(core-n) $(core-) $(drivers-n) $(drivers-) \
568 $(net-n) $(net-) $(libs-n) $(libs-))))
569
570init-y := $(patsubst %/, %/built-in.o, $(init-y))
571core-y := $(patsubst %/, %/built-in.o, $(core-y))
572drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
573net-y := $(patsubst %/, %/built-in.o, $(net-y))
574libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
575libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
576libs-y := $(libs-y1) $(libs-y2)
577
578# Build vmlinux
579# ---------------------------------------------------------------------------
580# vmlinux is build from the objects selected by $(vmlinux-init) and
581# $(vmlinux-main). Most are built-in.o files from top-level directories
582# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
583# Ordering when linking is important, and $(vmlinux-init) must be first.
584#
585# vmlinux
586# ^
587# |
588# +-< $(vmlinux-init)
589# | +--< init/version.o + more
590# |
591# +--< $(vmlinux-main)
592# | +--< driver/built-in.o mm/built-in.o + more
593# |
594# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
595#
596# vmlinux version (uname -v) cannot be updated during normal
597# descending-into-subdirs phase since we do not yet know if we need to
598# update vmlinux.
599# Therefore this step is delayed until just before final link of vmlinux -
600# except in the kallsyms case where it is done just before adding the
601# symbols to the kernel.
602#
603# System.map is generated to document addresses of all kernel symbols
604
605vmlinux-init := $(head-y) $(init-y)
606vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
607vmlinux-all := $(vmlinux-init) $(vmlinux-main)
608vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
609
610# Rule to link vmlinux - also used during CONFIG_KALLSYMS
611# May be overridden by arch/$(ARCH)/Makefile
612quiet_cmd_vmlinux__ ?= LD $@
613 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
614 -T $(vmlinux-lds) $(vmlinux-init) \
615 --start-group $(vmlinux-main) --end-group \
616 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
617
618# Generate new vmlinux version
619quiet_cmd_vmlinux_version = GEN .version
620 cmd_vmlinux_version = set -e; \
621 if [ ! -r .version ]; then \
622 rm -f .version; \
623 echo 1 >.version; \
624 else \
625 mv .version .old_version; \
626 expr 0$$(cat .old_version) + 1 >.version; \
627 fi; \
628 $(MAKE) $(build)=init
629
630# Generate System.map
631quiet_cmd_sysmap = SYSMAP
632 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
633
634# Link of vmlinux
635# If CONFIG_KALLSYMS is set .version is already updated
636# Generate System.map and verify that the content is consistent
637# Use + in front of the vmlinux_version rule to silent warning with make -j2
638# First command is ':' to allow us to use + in front of the rule
639define rule_vmlinux__
640 :
641 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
642
643 $(call cmd,vmlinux__)
644 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
645
646 $(Q)$(if $($(quiet)cmd_sysmap), \
647 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
648 $(cmd_sysmap) $@ System.map; \
649 if [ $$? -ne 0 ]; then \
650 rm -f $@; \
651 /bin/false; \
652 fi;
653 $(verify_kallsyms)
654endef
655
656
657ifdef CONFIG_KALLSYMS
658# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
659# It's a three stage process:
660# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
661# empty
662# Running kallsyms on that gives us .tmp_kallsyms1.o with
663# the right size - vmlinux version (uname -v) is updated during this step
664# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
665# but due to the added section, some addresses have shifted.
666# From here, we generate a correct .tmp_kallsyms2.o
667# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
668# o Verify that the System.map from vmlinux matches the map from
669# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
670# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
671# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
672# temporary bypass to allow the kernel to be built while the
673# maintainers work out what went wrong with kallsyms.
674
675ifdef CONFIG_KALLSYMS_EXTRA_PASS
676last_kallsyms := 3
677else
678last_kallsyms := 2
679endif
680
681kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
682
683define verify_kallsyms
684 $(Q)$(if $($(quiet)cmd_sysmap), \
685 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
686 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
687 $(Q)cmp -s System.map .tmp_System.map || \
688 (echo Inconsistent kallsyms data; \
689 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
690 rm .tmp_kallsyms* ; /bin/false )
691endef
692
693# Update vmlinux version before link
694# Use + in front of this rule to silent warning about make -j1
695# First command is ':' to allow us to use + in front of this rule
696cmd_ksym_ld = $(cmd_vmlinux__)
697define rule_ksym_ld
698 :
699 +$(call cmd,vmlinux_version)
700 $(call cmd,vmlinux__)
701 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
702endef
703
704# Generate .S file with all kernel symbols
705quiet_cmd_kallsyms = KSYM $@
706 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
707 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
708
709.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
710 $(call if_changed_dep,as_o_S)
711
712.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
713 $(call cmd,kallsyms)
714
715# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
716.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
717 $(call if_changed_rule,ksym_ld)
718
719.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
720 $(call if_changed,vmlinux__)
721
722.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
723 $(call if_changed,vmlinux__)
724
725# Needs to visit scripts/ before $(KALLSYMS) can be used.
726$(KALLSYMS): scripts ;
727
728# Generate some data for debugging strange kallsyms problems
729debug_kallsyms: .tmp_map$(last_kallsyms)
730
731.tmp_map%: .tmp_vmlinux% FORCE
732 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
733
734.tmp_map3: .tmp_map2
735
736.tmp_map2: .tmp_map1
737
738endif # ifdef CONFIG_KALLSYMS
739
740# vmlinux image - including updated kernel symbols
741vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
742 $(call if_changed_rule,vmlinux__)
743 $(Q)rm -f .old_version
744
745# The actual objects are generated when descending,
746# make sure no implicit rule kicks in
747$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
748
749# Handle descending into subdirectories listed in $(vmlinux-dirs)
750# Preset locale variables to speed up the build process. Limit locale
751# tweaks to this spot to avoid wrong language settings when running
752# make menuconfig etc.
753# Error messages still appears in the original language
754
755.PHONY: $(vmlinux-dirs)
756$(vmlinux-dirs): prepare scripts
757 $(Q)$(MAKE) $(build)=$@
758
759# Build the kernel release string
760# The KERNELRELEASE is stored in a file named .kernelrelease
761# to be used when executing for example make install or make modules_install
762#
763# Take the contents of any files called localversion* and the config
764# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
765# LOCALVERSION from the command line override all of this
766
767nullstring :=
768space := $(nullstring) # end of line
769
770___localver = $(objtree)/localversion* $(srctree)/localversion*
771__localver = $(sort $(wildcard $(___localver)))
772# skip backup files (containing '~')
773_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
774
775localver = $(subst $(space),, \
776 $(shell cat /dev/null $(_localver)) \
777 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
778
779# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
780# and if the SCM is know a tag from the SCM is appended.
781# The appended tag is determinded by the SCM used.
782#
783# Currently, only git is supported.
784# Other SCMs can edit scripts/setlocalversion and add the appropriate
785# checks as needed.
786ifdef CONFIG_LOCALVERSION_AUTO
787 _localver-auto = $(shell $(CONFIG_SHELL) \
788 $(srctree)/scripts/setlocalversion $(srctree))
789 localver-auto = $(LOCALVERSION)$(_localver-auto)
790endif
791
792localver-full = $(localver)$(localver-auto)
793
794# Store (new) KERNELRELASE string in .kernelrelease
795kernelrelease = $(KERNELVERSION)$(localver-full)
796.kernelrelease: FORCE
797 $(Q)rm -f $@
798 $(Q)echo $(kernelrelease) > $@
799
800
801# Things we need to do before we recursively start building the kernel
802# or the modules are listed in "prepare".
803# A multi level approach is used. prepareN is processed before prepareN-1.
804# archprepare is used in arch Makefiles and when processed asm symlink,
805# version.h and scripts_basic is processed / created.
806
807# Listed in dependency order
808.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
809
810# prepare-all is deprecated, use prepare as valid replacement
811.PHONY: prepare-all
812
813# prepare3 is used to check if we are building in a separate output directory,
814# and if so do:
815# 1) Check that make has not been executed in the kernel src $(srctree)
816# 2) Create the include2 directory, used for the second asm symlink
817prepare3: .kernelrelease
818ifneq ($(KBUILD_SRC),)
819 @echo ' Using $(srctree) as source for kernel'
820 $(Q)if [ -f $(srctree)/.config ]; then \
821 echo " $(srctree) is not clean, please run 'make mrproper'";\
822 echo " in the '$(srctree)' directory.";\
823 /bin/false; \
824 fi;
825 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
826 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
827endif
828
829# prepare2 creates a makefile if using a separate output directory
830prepare2: prepare3 outputmakefile
831
832prepare1: prepare2 include/linux/version.h include/asm \
833 include/config/MARKER
834ifneq ($(KBUILD_MODULES),)
835 $(Q)rm -rf $(MODVERDIR)
836 $(Q)mkdir -p $(MODVERDIR)
837endif
838
839archprepare: prepare1 scripts_basic
840
841prepare0: archprepare FORCE
842 $(Q)$(MAKE) $(build)=.
843
844# All the preparing..
845prepare prepare-all: prepare0
846
847# Leave this as default for preprocessing vmlinux.lds.S, which is now
848# done in arch/$(ARCH)/kernel/Makefile
849
850export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
851
852# Single targets
853# ---------------------------------------------------------------------------
854
855%.s: %.c scripts FORCE
856 $(Q)$(MAKE) $(build)=$(@D) $@
857%.i: %.c scripts FORCE
858 $(Q)$(MAKE) $(build)=$(@D) $@
859%.o: %.c scripts FORCE
860 $(Q)$(MAKE) $(build)=$(@D) $@
861%.ko: scripts FORCE
862 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
863 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
864%/: scripts prepare FORCE
865 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
866%.lst: %.c scripts FORCE
867 $(Q)$(MAKE) $(build)=$(@D) $@
868%.s: %.S scripts FORCE
869 $(Q)$(MAKE) $(build)=$(@D) $@
870%.o: %.S scripts FORCE
871 $(Q)$(MAKE) $(build)=$(@D) $@
872
873# FIXME: The asm symlink changes when $(ARCH) changes. That's
874# hard to detect, but I suppose "make mrproper" is a good idea
875# before switching between archs anyway.
876
877include/asm:
878 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
879 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
880 @ln -fsn asm-$(ARCH) $@
881
882# Split autoconf.h into include/linux/config/*
883
884include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
885 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
886 @scripts/basic/split-include include/linux/autoconf.h include/config
887 @touch $@
888
889# Generate some files
890# ---------------------------------------------------------------------------
891
892# KERNELRELEASE can change from a few different places, meaning version.h
893# needs to be updated, so this check is forced on all builds
894
895uts_len := 64
896
897define filechk_version.h
898 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
899 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
900 exit 1; \
901 fi; \
902 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
903 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
904 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
905 )
906endef
907
908include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
909 $(call filechk,version.h)
910
911# ---------------------------------------------------------------------------
912
913.PHONY: depend dep
914depend dep:
915 @echo '*** Warning: make $@ is unnecessary now.'
916
917# ---------------------------------------------------------------------------
918# Modules
919
920ifdef CONFIG_MODULES
921
922# By default, build modules as well
923
924all: modules
925
926# Build modules
927
928.PHONY: modules
929modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
930 @echo ' Building modules, stage 2.';
931 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
932
933
934# Target to prepare building external modules
935.PHONY: modules_prepare
936modules_prepare: prepare scripts
937
938# Target to install modules
939.PHONY: modules_install
940modules_install: _modinst_ _modinst_post
941
942.PHONY: _modinst_
943_modinst_:
944 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
945 echo "Warning: you may need to install module-init-tools"; \
946 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
947 sleep 1; \
948 fi
949 @rm -rf $(MODLIB)/kernel
950 @rm -f $(MODLIB)/source
951 @mkdir -p $(MODLIB)/kernel
952 @ln -s $(srctree) $(MODLIB)/source
953 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
954 rm -f $(MODLIB)/build ; \
955 ln -s $(objtree) $(MODLIB)/build ; \
956 fi
957 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
958
959# If System.map exists, run depmod. This deliberately does not have a
960# dependency on System.map since that would run the dependency tree on
961# vmlinux. This depmod is only for convenience to give the initial
962# boot a modules.dep even before / is mounted read-write. However the
963# boot script depmod is the master version.
964ifeq "$(strip $(INSTALL_MOD_PATH))" ""
965depmod_opts :=
966else
967depmod_opts := -b $(INSTALL_MOD_PATH) -r
968endif
969.PHONY: _modinst_post
970_modinst_post: _modinst_
971 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
972
973else # CONFIG_MODULES
974
975# Modules not configured
976# ---------------------------------------------------------------------------
977
978modules modules_install: FORCE
979 @echo
980 @echo "The present kernel configuration has modules disabled."
981 @echo "Type 'make config' and enable loadable module support."
982 @echo "Then build a kernel with module support enabled."
983 @echo
984 @exit 1
985
986endif # CONFIG_MODULES
987
988###
989# Cleaning is done on three levels.
990# make clean Delete most generated files
991# Leave enough to build external modules
992# make mrproper Delete the current configuration, and all generated files
993# make distclean Remove editor backup files, patch leftover files and the like
994
995# Directories & files removed with 'make clean'
996CLEAN_DIRS += $(MODVERDIR)
997CLEAN_FILES += vmlinux System.map \
998 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
999
1000# Directories & files removed with 'make mrproper'
1001MRPROPER_DIRS += include/config include2
1002MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1003 include/linux/autoconf.h include/linux/version.h \
1004 .kernelrelease Module.symvers tags TAGS cscope*
1005
1006# clean - Delete most, but leave enough to build external modules
1007#
1008clean: rm-dirs := $(CLEAN_DIRS)
1009clean: rm-files := $(CLEAN_FILES)
1010clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1011
1012.PHONY: $(clean-dirs) clean archclean
1013$(clean-dirs):
1014 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1015
1016clean: archclean $(clean-dirs)
1017 $(call cmd,rmdirs)
1018 $(call cmd,rmfiles)
1019 @find . $(RCS_FIND_IGNORE) \
1020 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1021 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1022 -type f -print | xargs rm -f
1023
1024# mrproper - Delete all generated files, including .config
1025#
1026mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1027mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1028mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1029
1030.PHONY: $(mrproper-dirs) mrproper archmrproper
1031$(mrproper-dirs):
1032 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1033
1034mrproper: clean archmrproper $(mrproper-dirs)
1035 $(call cmd,rmdirs)
1036 $(call cmd,rmfiles)
1037
1038# distclean
1039#
1040.PHONY: distclean
1041
1042distclean: mrproper
1043 @find $(srctree) $(RCS_FIND_IGNORE) \
1044 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1045 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1046 -o -name '.*.rej' -o -size 0 \
1047 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1048 -type f -print | xargs rm -f
1049
1050
1051# Packaging of the kernel to various formats
1052# ---------------------------------------------------------------------------
1053# rpm target kept for backward compatibility
1054package-dir := $(srctree)/scripts/package
1055
1056.PHONY: %-pkg rpm
1057
1058%pkg: FORCE
1059 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1060rpm: FORCE
1061 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1062
1063
1064# Brief documentation of the typical targets used
1065# ---------------------------------------------------------------------------
1066
1067boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1068boards := $(notdir $(boards))
1069
1070help:
1071 @echo 'Cleaning targets:'
1072 @echo ' clean - remove most generated files but keep the config'
1073 @echo ' mrproper - remove all generated files + config + various backup files'
1074 @echo ''
1075 @echo 'Configuration targets:'
1076 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1077 @echo ''
1078 @echo 'Other generic targets:'
1079 @echo ' all - Build all targets marked with [*]'
1080 @echo '* vmlinux - Build the bare kernel'
1081 @echo '* modules - Build all modules'
1082 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1083 @echo ' dir/ - Build all files in dir and below'
1084 @echo ' dir/file.[ois] - Build specified target only'
1085 @echo ' dir/file.ko - Build module including final link'
1086 @echo ' rpm - Build a kernel as an RPM package'
1087 @echo ' tags/TAGS - Generate tags file for editors'
1088 @echo ' cscope - Generate cscope index'
1089 @echo ' kernelrelease - Output the release version string'
1090 @echo ' kernelversion - Output the version stored in Makefile'
1091 @echo ''
1092 @echo 'Static analysers'
1093 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1094 @echo ' and init sections from non-init sections'
1095 @echo ' checkstack - Generate a list of stack hogs'
1096 @echo ' namespacecheck - Name space analysis on compiled kernel'
1097 @echo ''
1098 @echo 'Kernel packaging:'
1099 @$(MAKE) -f $(package-dir)/Makefile help
1100 @echo ''
1101 @echo 'Documentation targets:'
1102 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1103 @echo ''
1104 @echo 'Architecture specific targets ($(ARCH)):'
1105 @$(if $(archhelp),$(archhelp),\
1106 echo ' No architecture specific help defined for $(ARCH)')
1107 @echo ''
1108 @$(if $(boards), \
1109 $(foreach b, $(boards), \
1110 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1111 echo '')
1112
1113 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1114 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1115 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1116 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1117 @echo ''
1118 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1119 @echo 'For further info see the ./README file'
1120
1121
1122# Documentation targets
1123# ---------------------------------------------------------------------------
1124%docs: scripts_basic FORCE
1125 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1126
1127else # KBUILD_EXTMOD
1128
1129###
1130# External module support.
1131# When building external modules the kernel used as basis is considered
1132# read-only, and no consistency checks are made and the make
1133# system is not used on the basis kernel. If updates are required
1134# in the basis kernel ordinary make commands (without M=...) must
1135# be used.
1136#
1137# The following are the only valid targets when building external
1138# modules.
1139# make M=dir clean Delete all automatically generated files
1140# make M=dir modules Make all modules in specified dir
1141# make M=dir Same as 'make M=dir modules'
1142# make M=dir modules_install
1143# Install the modules build in the module directory
1144# Assumes install directory is already created
1145
1146# We are always building modules
1147KBUILD_MODULES := 1
1148.PHONY: crmodverdir
1149crmodverdir:
1150 $(Q)mkdir -p $(MODVERDIR)
1151
1152.PHONY: $(objtree)/Module.symvers
1153$(objtree)/Module.symvers:
1154 @test -e $(objtree)/Module.symvers || ( \
1155 echo; \
1156 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1157 echo " is missing; modules will have no dependencies and modversions."; \
1158 echo )
1159
1160module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1161.PHONY: $(module-dirs) modules
1162$(module-dirs): crmodverdir $(objtree)/Module.symvers
1163 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1164
1165modules: $(module-dirs)
1166 @echo ' Building modules, stage 2.';
1167 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1168
1169.PHONY: modules_install
1170modules_install:
1171 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1172
1173clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1174
1175.PHONY: $(clean-dirs) clean
1176$(clean-dirs):
1177 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1178
1179clean: rm-dirs := $(MODVERDIR)
1180clean: $(clean-dirs)
1181 $(call cmd,rmdirs)
1182 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1183 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1184 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1185 -type f -print | xargs rm -f
1186
1187help:
1188 @echo ' Building external modules.'
1189 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1190 @echo ''
1191 @echo ' modules - default target, build the module(s)'
1192 @echo ' modules_install - install the module'
1193 @echo ' clean - remove generated files in module directory only'
1194 @echo ''
1195endif # KBUILD_EXTMOD
1196
1197# Generate tags for editors
1198# ---------------------------------------------------------------------------
1199
1200#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1201#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1202#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1203
1204ifeq ($(src),$(obj))
1205__srctree =
1206else
1207__srctree = $(srctree)/
1208endif
1209
1210ifeq ($(ALLSOURCE_ARCHS),)
1211ifeq ($(ARCH),um)
1212ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1213else
1214ALLINCLUDE_ARCHS := $(ARCH)
1215endif
1216else
1217#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1218ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1219endif
1220
1221ALLSOURCE_ARCHS := $(ARCH)
1222
1223define all-sources
1224 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1225 \( -name include -o -name arch \) -prune -o \
1226 -name '*.[chS]' -print; \
1227 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1228 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1229 -name '*.[chS]' -print; \
1230 done ; \
1231 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1232 -name '*.[chS]' -print; \
1233 find $(__srctree)include $(RCS_FIND_IGNORE) \
1234 \( -name config -o -name 'asm-*' \) -prune \
1235 -o -name '*.[chS]' -print; \
1236 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1237 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1238 -name '*.[chS]' -print; \
1239 done ; \
1240 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1241 -name '*.[chS]' -print )
1242endef
1243
1244quiet_cmd_cscope-file = FILELST cscope.files
1245 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1246
1247quiet_cmd_cscope = MAKE cscope.out
1248 cmd_cscope = cscope -b
1249
1250cscope: FORCE
1251 $(call cmd,cscope-file)
1252 $(call cmd,cscope)
1253
1254quiet_cmd_TAGS = MAKE $@
1255define cmd_TAGS
1256 rm -f $@; \
1257 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1258 echo "-I __initdata,__exitdata,__acquires,__releases \
1259 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1260 --extra=+f --c-kinds=+px"`; \
1261 $(all-sources) | xargs etags $$ETAGSF -a
1262endef
1263
1264TAGS: FORCE
1265 $(call cmd,TAGS)
1266
1267
1268quiet_cmd_tags = MAKE $@
1269define cmd_tags
1270 rm -f $@; \
1271 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1272 echo "-I __initdata,__exitdata,__acquires,__releases \
1273 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1274 --extra=+f --c-kinds=+px"`; \
1275 $(all-sources) | xargs ctags $$CTAGSF -a
1276endef
1277
1278tags: FORCE
1279 $(call cmd,tags)
1280
1281
1282# Scripts to check various things for consistency
1283# ---------------------------------------------------------------------------
1284
1285includecheck:
1286 find * $(RCS_FIND_IGNORE) \
1287 -name '*.[hcS]' -type f -print | sort \
1288 | xargs $(PERL) -w scripts/checkincludes.pl
1289
1290versioncheck:
1291 find * $(RCS_FIND_IGNORE) \
1292 -name '*.[hcS]' -type f -print | sort \
1293 | xargs $(PERL) -w scripts/checkversion.pl
1294
1295buildcheck:
1296 $(PERL) $(srctree)/scripts/reference_discarded.pl
1297 $(PERL) $(srctree)/scripts/reference_init.pl
1298
1299namespacecheck:
1300 $(PERL) $(srctree)/scripts/namespace.pl
1301
1302endif #ifeq ($(config-targets),1)
1303endif #ifeq ($(mixed-targets),1)
1304
1305.PHONY: checkstack
1306checkstack:
1307 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1308 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1309
1310kernelrelease:
1311 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1312 $(error kernelrelease not valid - run 'make *config' to update it))
1313kernelversion:
1314 @echo $(KERNELVERSION)
1315
1316# FIXME Should go into a make.lib or something
1317# ===========================================================================
1318
1319quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1320 cmd_rmdirs = rm -rf $(rm-dirs)
1321
1322quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1323 cmd_rmfiles = rm -f $(rm-files)
1324
1325
1326a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1327 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1328 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1329
1330quiet_cmd_as_o_S = AS $@
1331cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1332
1333# read all saved command lines
1334
1335targets := $(wildcard $(sort $(targets)))
1336cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1337
1338ifneq ($(cmd_files),)
1339 $(cmd_files): ; # Do not try to update included dependency files
1340 include $(cmd_files)
1341endif
1342
1343# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1344# Usage:
1345# $(Q)$(MAKE) $(clean)=dir
1346clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1347
1348endif # skip-makefile
1349
1350FORCE: