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 = 15
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
144nullstring :=
145space := $(nullstring) # end of line
146
147# Take the contents of any files called localversion* and the config
148# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be
149# careful not to include files twice if building in the source
150# directory. LOCALVERSION from the command line override all of this
151
152localver := $(objtree)/localversion* $(srctree)/localversion*
153localver := $(sort $(wildcard $(localver)))
154# skip backup files (containing '~')
155localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f)))
156
157LOCALVERSION = $(subst $(space),, \
158 $(shell cat /dev/null $(localver)) \
159 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
160
161KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION)
162
163# SUBARCH tells the usermode build what the underlying arch is. That is set
164# first, and if a usermode build is happening, the "ARCH=um" on the command
165# line overrides the setting of ARCH below. If a native build is happening,
166# then ARCH is assigned, getting whatever value it gets normally, and
167# SUBARCH is subsequently ignored.
168
169SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
170 -e s/arm.*/arm/ -e s/sa110/arm/ \
171 -e s/s390x/s390/ -e s/parisc64/parisc/ \
172 -e s/ppc64/powerpc/ )
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
192
193ARCH ?= $(SUBARCH)
194CROSS_COMPILE ?=
195
196# Architecture as present in compile.h
197UTS_MACHINE := $(ARCH)
198
199# SHELL used by kbuild
200CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
201 else if [ -x /bin/bash ]; then echo /bin/bash; \
202 else echo sh; fi ; fi)
203
204HOSTCC = gcc
205HOSTCXX = g++
206HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
207HOSTCXXFLAGS = -O2
208
209# Decide whether to build built-in, modular, or both.
210# Normally, just do built-in.
211
212KBUILD_MODULES :=
213KBUILD_BUILTIN := 1
214
215# If we have only "make modules", don't compile built-in objects.
216# When we're building modules with modversions, we need to consider
217# the built-in objects during the descend as well, in order to
218# make sure the checksums are uptodate before we record them.
219
220ifeq ($(MAKECMDGOALS),modules)
221 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
222endif
223
224# If we have "make <whatever> modules", compile modules
225# in addition to whatever we do anyway.
226# Just "make" or "make all" shall build modules as well
227
228ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
229 KBUILD_MODULES := 1
230endif
231
232ifeq ($(MAKECMDGOALS),)
233 KBUILD_MODULES := 1
234endif
235
236export KBUILD_MODULES KBUILD_BUILTIN
237export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
238
239# Beautify output
240# ---------------------------------------------------------------------------
241#
242# Normally, we echo the whole command before executing it. By making
243# that echo $($(quiet)$(cmd)), we now have the possibility to set
244# $(quiet) to choose other forms of output instead, e.g.
245#
246# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
247# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
248#
249# If $(quiet) is empty, the whole command will be printed.
250# If it is set to "quiet_", only the short version will be printed.
251# If it is set to "silent_", nothing wil be printed at all, since
252# the variable $(silent_cmd_cc_o_c) doesn't exist.
253#
254# A simple variant is to prefix commands with $(Q) - that's usefull
255# for commands that shall be hidden in non-verbose mode.
256#
257# $(Q)ln $@ :<
258#
259# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
260# If KBUILD_VERBOSE equals 1 then the above command is displayed.
261
262ifeq ($(KBUILD_VERBOSE),1)
263 quiet =
264 Q =
265else
266 quiet=quiet_
267 Q = @
268endif
269
270# If the user is running make -s (silent mode), suppress echoing of
271# commands
272
273ifneq ($(findstring s,$(MAKEFLAGS)),)
274 quiet=silent_
275endif
276
277export quiet Q KBUILD_VERBOSE
278
279######
280# cc support functions to be used (only) in arch/$(ARCH)/Makefile
281# See documentation in Documentation/kbuild/makefiles.txt
282
283# cc-option
284# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
285
286cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
287 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
288
289# For backward compatibility
290check_gcc = $(warning check_gcc is deprecated - use cc-option) \
291 $(call cc-option, $(1),$(2))
292
293# cc-option-yn
294# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
295cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
296 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
297
298# cc-option-align
299# Prefix align with either -falign or -malign
300cc-option-align = $(subst -functions=0,,\
301 $(call cc-option,-falign-functions=0,-malign-functions=0))
302
303# cc-version
304# Usage gcc-ver := $(call cc-version $(CC))
305cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
306 $(if $(1), $(1), $(CC)))
307
308
309# Look for make include files relative to root of kernel src
310MAKEFLAGS += --include-dir=$(srctree)
311
312# We need some generic definitions
313include $(srctree)/scripts/Kbuild.include
314
315# For maximum performance (+ possibly random breakage, uncomment
316# the following)
317
318#MAKEFLAGS += -rR
319
320# Make variables (CC, etc...)
321
322AS = $(CROSS_COMPILE)as
323LD = $(CROSS_COMPILE)ld
324CC = $(CROSS_COMPILE)gcc
325CPP = $(CC) -E
326AR = $(CROSS_COMPILE)ar
327NM = $(CROSS_COMPILE)nm
328STRIP = $(CROSS_COMPILE)strip
329OBJCOPY = $(CROSS_COMPILE)objcopy
330OBJDUMP = $(CROSS_COMPILE)objdump
331AWK = awk
332GENKSYMS = scripts/genksyms/genksyms
333DEPMOD = /sbin/depmod
334KALLSYMS = scripts/kallsyms
335PERL = perl
336CHECK = sparse
337
338CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
339MODFLAGS = -DMODULE
340CFLAGS_MODULE = $(MODFLAGS)
341AFLAGS_MODULE = $(MODFLAGS)
342LDFLAGS_MODULE = -r
343CFLAGS_KERNEL =
344AFLAGS_KERNEL =
345
346
347# Use LINUXINCLUDE when you must reference the include/ directory.
348# Needed to be compatible with the O= option
349LINUXINCLUDE := -Iinclude \
350 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
351 -include include/linux/autoconf.h
352
353CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
354
355CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
356 -fno-strict-aliasing -fno-common \
357 -ffreestanding
358AFLAGS := -D__ASSEMBLY__
359
360export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
361 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
362 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
363 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
364
365export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
366export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
367export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
368
369# When compiling out-of-tree modules, put MODVERDIR in the module
370# tree rather than in the kernel tree. The kernel tree might
371# even be read-only.
372export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
373
374# Files to ignore in find ... statements
375
376RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
377export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
378
379# ===========================================================================
380# Rules shared between *config targets and build targets
381
382# Basic helpers built in scripts/
383.PHONY: scripts_basic
384scripts_basic:
385 $(Q)$(MAKE) $(build)=scripts/basic
386
387# To avoid any implicit rule to kick in, define an empty command.
388scripts/basic/%: scripts_basic ;
389
390.PHONY: outputmakefile
391# outputmakefile generate a Makefile to be placed in output directory, if
392# using a seperate output directory. This allows convinient use
393# of make in output directory
394outputmakefile:
395 $(Q)if test ! $(srctree) -ef $(objtree); then \
396 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
397 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
398 > $(objtree)/Makefile; \
399 echo ' GEN $(objtree)/Makefile'; \
400 fi
401
402# To make sure we do not include .config for any of the *config targets
403# catch them early, and hand them over to scripts/kconfig/Makefile
404# It is allowed to specify more targets when calling make, including
405# mixing *config targets and build targets.
406# For example 'make oldconfig all'.
407# Detect when mixed targets is specified, and make a second invocation
408# of make so .config is not included in this case either (for *config).
409
410no-dot-config-targets := clean mrproper distclean \
411 cscope TAGS tags help %docs check%
412
413config-targets := 0
414mixed-targets := 0
415dot-config := 1
416
417ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
418 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
419 dot-config := 0
420 endif
421endif
422
423ifeq ($(KBUILD_EXTMOD),)
424 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
425 config-targets := 1
426 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
427 mixed-targets := 1
428 endif
429 endif
430endif
431
432ifeq ($(mixed-targets),1)
433# ===========================================================================
434# We're called with mixed targets (*config and build targets).
435# Handle them one by one.
436
437%:: FORCE
438 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
439
440else
441ifeq ($(config-targets),1)
442# ===========================================================================
443# *config targets only - make sure prerequisites are updated, and descend
444# in scripts/kconfig to make the *config target
445
446# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
447# KBUILD_DEFCONFIG may point out an alternative default configuration
448# used for 'make defconfig'
449include $(srctree)/arch/$(ARCH)/Makefile
450export KBUILD_DEFCONFIG
451
452config %config: scripts_basic outputmakefile FORCE
453 $(Q)mkdir -p include/linux
454 $(Q)$(MAKE) $(build)=scripts/kconfig $@
455
456else
457# ===========================================================================
458# Build targets only - this includes vmlinux, arch specific targets, clean
459# targets and others. In general all targets except *config targets.
460
461ifeq ($(KBUILD_EXTMOD),)
462# Additional helpers built in scripts/
463# Carefully list dependencies so we do not try to build scripts twice
464# in parrallel
465.PHONY: scripts
466scripts: scripts_basic include/config/MARKER
467 $(Q)$(MAKE) $(build)=$(@)
468
469scripts_basic: include/linux/autoconf.h
470
471# Objects we will link into vmlinux / subdirs we need to visit
472init-y := init/
473drivers-y := drivers/ sound/
474net-y := net/
475libs-y := lib/
476core-y := usr/
477endif # KBUILD_EXTMOD
478
479ifeq ($(dot-config),1)
480# In this section, we need .config
481
482# Read in dependencies to all Kconfig* files, make sure to run
483# oldconfig if changes are detected.
484-include .config.cmd
485
486include .config
487
488# If .config needs to be updated, it will be done via the dependency
489# that autoconf has on .config.
490# To avoid any implicit rule to kick in, define an empty command
491.config: ;
492
493# If .config is newer than include/linux/autoconf.h, someone tinkered
494# with it and forgot to run make oldconfig
495include/linux/autoconf.h: .config
496 $(Q)mkdir -p include/linux
497 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
498else
499# Dummy target needed, because used as prerequisite
500include/linux/autoconf.h: ;
501endif
502
503# The all: target is the default when no target is given on the
504# command line.
505# This allow a user to issue only 'make' to build a kernel including modules
506# Defaults vmlinux but it is usually overriden in the arch makefile
507all: vmlinux
508
509ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
510CFLAGS += -Os
511else
512CFLAGS += -O2
513endif
514
515#Add align options if CONFIG_CC_* is not equal to 0
516add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
517CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
518CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
519CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
520CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
521
522ifdef CONFIG_FRAME_POINTER
523CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
524else
525CFLAGS += -fomit-frame-pointer
526endif
527
528ifdef CONFIG_DEBUG_INFO
529CFLAGS += -g
530endif
531
532include $(srctree)/arch/$(ARCH)/Makefile
533
534# arch Makefile may override CC so keep this after arch Makefile is included
535NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
536CHECKFLAGS += $(NOSTDINC_FLAGS)
537
538# warn about C99 declaration after statement
539CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
540
541# disable pointer signedness warnings in gcc 4.0
542CFLAGS += $(call cc-option,-Wno-pointer-sign,)
543
544# Default kernel image to build when no specific target is given.
545# KBUILD_IMAGE may be overruled on the commandline or
546# set in the environment
547# Also any assignments in arch/$(ARCH)/Makefile take precedence over
548# this default value
549export KBUILD_IMAGE ?= vmlinux
550
551#
552# INSTALL_PATH specifies where to place the updated kernel and system map
553# images. Default is /boot, but you can set it to other values
554export INSTALL_PATH ?= /boot
555
556# If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests
557# and try to determine if the current source tree is a release tree, of any sort,
558# or if is a pure development tree.
559#
560# A 'release tree' is any tree with a git TAG associated
561# with it. The primary goal of this is to make it safe for a native
562# git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to
563# continue developing against the current Linus tree, without having the Linus
564# tree overwrite the 2.6.9 tree when installed.
565#
566# Currently, only git is supported.
567# Other SCMs can edit scripts/setlocalversion and add the appropriate
568# checks as needed.
569
570
571ifdef CONFIG_LOCALVERSION_AUTO
572 localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree))
573 LOCALVERSION := $(LOCALVERSION)$(localversion-auto)
574endif
575
576#
577# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
578# relocations required by build roots. This is not defined in the
579# makefile but the arguement can be passed to make if needed.
580#
581
582MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
583export MODLIB
584
585
586ifeq ($(KBUILD_EXTMOD),)
587core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
588
589vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
590 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
591 $(net-y) $(net-m) $(libs-y) $(libs-m)))
592
593vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
594 $(init-n) $(init-) \
595 $(core-n) $(core-) $(drivers-n) $(drivers-) \
596 $(net-n) $(net-) $(libs-n) $(libs-))))
597
598init-y := $(patsubst %/, %/built-in.o, $(init-y))
599core-y := $(patsubst %/, %/built-in.o, $(core-y))
600drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
601net-y := $(patsubst %/, %/built-in.o, $(net-y))
602libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
603libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
604libs-y := $(libs-y1) $(libs-y2)
605
606# Build vmlinux
607# ---------------------------------------------------------------------------
608# vmlinux is build from the objects selected by $(vmlinux-init) and
609# $(vmlinux-main). Most are built-in.o files from top-level directories
610# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
611# Ordering when linking is important, and $(vmlinux-init) must be first.
612#
613# vmlinux
614# ^
615# |
616# +-< $(vmlinux-init)
617# | +--< init/version.o + more
618# |
619# +--< $(vmlinux-main)
620# | +--< driver/built-in.o mm/built-in.o + more
621# |
622# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
623#
624# vmlinux version (uname -v) cannot be updated during normal
625# descending-into-subdirs phase since we do not yet know if we need to
626# update vmlinux.
627# Therefore this step is delayed until just before final link of vmlinux -
628# except in the kallsyms case where it is done just before adding the
629# symbols to the kernel.
630#
631# System.map is generated to document addresses of all kernel symbols
632
633vmlinux-init := $(head-y) $(init-y)
634vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
635vmlinux-all := $(vmlinux-init) $(vmlinux-main)
636vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
637
638# Rule to link vmlinux - also used during CONFIG_KALLSYMS
639# May be overridden by arch/$(ARCH)/Makefile
640quiet_cmd_vmlinux__ ?= LD $@
641 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
642 -T $(vmlinux-lds) $(vmlinux-init) \
643 --start-group $(vmlinux-main) --end-group \
644 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
645
646# Generate new vmlinux version
647quiet_cmd_vmlinux_version = GEN .version
648 cmd_vmlinux_version = set -e; \
649 if [ ! -r .version ]; then \
650 rm -f .version; \
651 echo 1 >.version; \
652 else \
653 mv .version .old_version; \
654 expr 0$$(cat .old_version) + 1 >.version; \
655 fi; \
656 $(MAKE) $(build)=init
657
658# Generate System.map
659quiet_cmd_sysmap = SYSMAP
660 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
661
662# Link of vmlinux
663# If CONFIG_KALLSYMS is set .version is already updated
664# Generate System.map and verify that the content is consistent
665# Use + in front of the vmlinux_version rule to silent warning with make -j2
666# First command is ':' to allow us to use + in front of the rule
667define rule_vmlinux__
668 :
669 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
670
671 $(call cmd,vmlinux__)
672 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
673
674 $(Q)$(if $($(quiet)cmd_sysmap), \
675 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
676 $(cmd_sysmap) $@ System.map; \
677 if [ $$? -ne 0 ]; then \
678 rm -f $@; \
679 /bin/false; \
680 fi;
681 $(verify_kallsyms)
682endef
683
684
685ifdef CONFIG_KALLSYMS
686# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
687# It's a three stage process:
688# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
689# empty
690# Running kallsyms on that gives us .tmp_kallsyms1.o with
691# the right size - vmlinux version (uname -v) is updated during this step
692# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
693# but due to the added section, some addresses have shifted.
694# From here, we generate a correct .tmp_kallsyms2.o
695# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
696# o Verify that the System.map from vmlinux matches the map from
697# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
698# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
699# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
700# temporary bypass to allow the kernel to be built while the
701# maintainers work out what went wrong with kallsyms.
702
703ifdef CONFIG_KALLSYMS_EXTRA_PASS
704last_kallsyms := 3
705else
706last_kallsyms := 2
707endif
708
709kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
710
711define verify_kallsyms
712 $(Q)$(if $($(quiet)cmd_sysmap), \
713 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
714 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
715 $(Q)cmp -s System.map .tmp_System.map || \
716 (echo Inconsistent kallsyms data; \
717 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
718 rm .tmp_kallsyms* ; /bin/false )
719endef
720
721# Update vmlinux version before link
722# Use + in front of this rule to silent warning about make -j1
723# First command is ':' to allow us to use + in front of this rule
724cmd_ksym_ld = $(cmd_vmlinux__)
725define rule_ksym_ld
726 :
727 +$(call cmd,vmlinux_version)
728 $(call cmd,vmlinux__)
729 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
730endef
731
732# Generate .S file with all kernel symbols
733quiet_cmd_kallsyms = KSYM $@
734 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
735 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
736
737.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
738 $(call if_changed_dep,as_o_S)
739
740.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
741 $(call cmd,kallsyms)
742
743# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
744.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
745 $(call if_changed_rule,ksym_ld)
746
747.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
748 $(call if_changed,vmlinux__)
749
750.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
751 $(call if_changed,vmlinux__)
752
753# Needs to visit scripts/ before $(KALLSYMS) can be used.
754$(KALLSYMS): scripts ;
755
756# Generate some data for debugging strange kallsyms problems
757debug_kallsyms: .tmp_map$(last_kallsyms)
758
759.tmp_map%: .tmp_vmlinux% FORCE
760 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
761
762.tmp_map3: .tmp_map2
763
764.tmp_map2: .tmp_map1
765
766endif # ifdef CONFIG_KALLSYMS
767
768# vmlinux image - including updated kernel symbols
769vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
770 $(call if_changed_rule,vmlinux__)
771 $(Q)rm -f .old_version
772
773# The actual objects are generated when descending,
774# make sure no implicit rule kicks in
775$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
776
777# Handle descending into subdirectories listed in $(vmlinux-dirs)
778# Preset locale variables to speed up the build process. Limit locale
779# tweaks to this spot to avoid wrong language settings when running
780# make menuconfig etc.
781# Error messages still appears in the original language
782
783.PHONY: $(vmlinux-dirs)
784$(vmlinux-dirs): prepare scripts
785 $(Q)$(MAKE) $(build)=$@
786
787# Things we need to do before we recursively start building the kernel
788# or the modules are listed in "prepare".
789# A multi level approach is used. prepareN is processed before prepareN-1.
790# archprepare is used in arch Makefiles and when processed asm symlink,
791# version.h and scripts_basic is processed / created.
792
793# Listed in dependency order
794.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
795
796# prepare-all is deprecated, use prepare as valid replacement
797.PHONY: prepare-all
798
799# prepare3 is used to check if we are building in a separate output directory,
800# and if so do:
801# 1) Check that make has not been executed in the kernel src $(srctree)
802# 2) Create the include2 directory, used for the second asm symlink
803
804prepare3:
805ifneq ($(KBUILD_SRC),)
806 @echo ' Using $(srctree) as source for kernel'
807 $(Q)if [ -f $(srctree)/.config ]; then \
808 echo " $(srctree) is not clean, please run 'make mrproper'";\
809 echo " in the '$(srctree)' directory.";\
810 /bin/false; \
811 fi;
812 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
813 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
814endif
815
816# prepare2 creates a makefile if using a separate output directory
817prepare2: prepare3 outputmakefile
818
819prepare1: prepare2 include/linux/version.h include/asm \
820 include/config/MARKER
821ifneq ($(KBUILD_MODULES),)
822 $(Q)rm -rf $(MODVERDIR)
823 $(Q)mkdir -p $(MODVERDIR)
824endif
825
826archprepare: prepare1 scripts_basic
827
828prepare0: archprepare FORCE
829 $(Q)$(MAKE) $(build)=.
830
831# All the preparing..
832prepare prepare-all: prepare0
833
834# Leave this as default for preprocessing vmlinux.lds.S, which is now
835# done in arch/$(ARCH)/kernel/Makefile
836
837export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
838
839# Single targets
840# ---------------------------------------------------------------------------
841
842%.s: %.c scripts FORCE
843 $(Q)$(MAKE) $(build)=$(@D) $@
844%.i: %.c scripts FORCE
845 $(Q)$(MAKE) $(build)=$(@D) $@
846%.o: %.c scripts FORCE
847 $(Q)$(MAKE) $(build)=$(@D) $@
848%.ko: scripts FORCE
849 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
850 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
851%/: scripts prepare FORCE
852 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
853%.lst: %.c scripts FORCE
854 $(Q)$(MAKE) $(build)=$(@D) $@
855%.s: %.S scripts FORCE
856 $(Q)$(MAKE) $(build)=$(@D) $@
857%.o: %.S scripts FORCE
858 $(Q)$(MAKE) $(build)=$(@D) $@
859
860# FIXME: The asm symlink changes when $(ARCH) changes. That's
861# hard to detect, but I suppose "make mrproper" is a good idea
862# before switching between archs anyway.
863
864include/asm:
865 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
866 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
867 @ln -fsn asm-$(ARCH) $@
868
869# Split autoconf.h into include/linux/config/*
870
871include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
872 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
873 @scripts/basic/split-include include/linux/autoconf.h include/config
874 @touch $@
875
876# Generate some files
877# ---------------------------------------------------------------------------
878
879# KERNELRELEASE can change from a few different places, meaning version.h
880# needs to be updated, so this check is forced on all builds
881
882uts_len := 64
883
884define filechk_version.h
885 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
886 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
887 exit 1; \
888 fi; \
889 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
890 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
891 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
892 )
893endef
894
895include/linux/version.h: $(srctree)/Makefile FORCE
896 $(call filechk,version.h)
897
898# ---------------------------------------------------------------------------
899
900.PHONY: depend dep
901depend dep:
902 @echo '*** Warning: make $@ is unnecessary now.'
903
904# ---------------------------------------------------------------------------
905# Modules
906
907ifdef CONFIG_MODULES
908
909# By default, build modules as well
910
911all: modules
912
913# Build modules
914
915.PHONY: modules
916modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
917 @echo ' Building modules, stage 2.';
918 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
919
920
921# Target to prepare building external modules
922.PHONY: modules_prepare
923modules_prepare: prepare scripts
924
925# Target to install modules
926.PHONY: modules_install
927modules_install: _modinst_ _modinst_post
928
929.PHONY: _modinst_
930_modinst_:
931 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
932 echo "Warning: you may need to install module-init-tools"; \
933 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
934 sleep 1; \
935 fi
936 @rm -rf $(MODLIB)/kernel
937 @rm -f $(MODLIB)/source
938 @mkdir -p $(MODLIB)/kernel
939 @ln -s $(srctree) $(MODLIB)/source
940 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
941 rm -f $(MODLIB)/build ; \
942 ln -s $(objtree) $(MODLIB)/build ; \
943 fi
944 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
945
946# If System.map exists, run depmod. This deliberately does not have a
947# dependency on System.map since that would run the dependency tree on
948# vmlinux. This depmod is only for convenience to give the initial
949# boot a modules.dep even before / is mounted read-write. However the
950# boot script depmod is the master version.
951ifeq "$(strip $(INSTALL_MOD_PATH))" ""
952depmod_opts :=
953else
954depmod_opts := -b $(INSTALL_MOD_PATH) -r
955endif
956.PHONY: _modinst_post
957_modinst_post: _modinst_
958 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
959
960else # CONFIG_MODULES
961
962# Modules not configured
963# ---------------------------------------------------------------------------
964
965modules modules_install: FORCE
966 @echo
967 @echo "The present kernel configuration has modules disabled."
968 @echo "Type 'make config' and enable loadable module support."
969 @echo "Then build a kernel with module support enabled."
970 @echo
971 @exit 1
972
973endif # CONFIG_MODULES
974
975###
976# Cleaning is done on three levels.
977# make clean Delete most generated files
978# Leave enough to build external modules
979# make mrproper Delete the current configuration, and all generated files
980# make distclean Remove editor backup files, patch leftover files and the like
981
982# Directories & files removed with 'make clean'
983CLEAN_DIRS += $(MODVERDIR)
984CLEAN_FILES += vmlinux System.map \
985 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
986
987# Directories & files removed with 'make mrproper'
988MRPROPER_DIRS += include/config include2
989MRPROPER_FILES += .config .config.old include/asm .version \
990 include/linux/autoconf.h include/linux/version.h \
991 Module.symvers tags TAGS cscope*
992
993# clean - Delete most, but leave enough to build external modules
994#
995clean: rm-dirs := $(CLEAN_DIRS)
996clean: rm-files := $(CLEAN_FILES)
997clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
998
999.PHONY: $(clean-dirs) clean archclean
1000$(clean-dirs):
1001 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1002
1003clean: archclean $(clean-dirs)
1004 $(call cmd,rmdirs)
1005 $(call cmd,rmfiles)
1006 @find . $(RCS_FIND_IGNORE) \
1007 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1008 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1009 -type f -print | xargs rm -f
1010
1011# mrproper - Delete all generated files, including .config
1012#
1013mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1014mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1015mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1016
1017.PHONY: $(mrproper-dirs) mrproper archmrproper
1018$(mrproper-dirs):
1019 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1020
1021mrproper: clean archmrproper $(mrproper-dirs)
1022 $(call cmd,rmdirs)
1023 $(call cmd,rmfiles)
1024
1025# distclean
1026#
1027.PHONY: distclean
1028
1029distclean: mrproper
1030 @find $(srctree) $(RCS_FIND_IGNORE) \
1031 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1032 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1033 -o -name '.*.rej' -o -size 0 \
1034 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1035 -type f -print | xargs rm -f
1036
1037
1038# Packaging of the kernel to various formats
1039# ---------------------------------------------------------------------------
1040# rpm target kept for backward compatibility
1041package-dir := $(srctree)/scripts/package
1042
1043.PHONY: %-pkg rpm
1044
1045%pkg: FORCE
1046 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1047rpm: FORCE
1048 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1049
1050
1051# Brief documentation of the typical targets used
1052# ---------------------------------------------------------------------------
1053
1054boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1055boards := $(notdir $(boards))
1056
1057help:
1058 @echo 'Cleaning targets:'
1059 @echo ' clean - remove most generated files but keep the config'
1060 @echo ' mrproper - remove all generated files + config + various backup files'
1061 @echo ''
1062 @echo 'Configuration targets:'
1063 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1064 @echo ''
1065 @echo 'Other generic targets:'
1066 @echo ' all - Build all targets marked with [*]'
1067 @echo '* vmlinux - Build the bare kernel'
1068 @echo '* modules - Build all modules'
1069 @echo ' modules_install - Install all modules'
1070 @echo ' dir/ - Build all files in dir and below'
1071 @echo ' dir/file.[ois] - Build specified target only'
1072 @echo ' dir/file.ko - Build module including final link'
1073 @echo ' rpm - Build a kernel as an RPM package'
1074 @echo ' tags/TAGS - Generate tags file for editors'
1075 @echo ' cscope - Generate cscope index'
1076 @echo ' kernelrelease - Output the release version string'
1077 @echo ''
1078 @echo 'Static analysers'
1079 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1080 @echo ' and init sections from non-init sections'
1081 @echo ' checkstack - Generate a list of stack hogs'
1082 @echo ' namespacecheck - Name space analysis on compiled kernel'
1083 @echo ''
1084 @echo 'Kernel packaging:'
1085 @$(MAKE) -f $(package-dir)/Makefile help
1086 @echo ''
1087 @echo 'Documentation targets:'
1088 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1089 @echo ''
1090 @echo 'Architecture specific targets ($(ARCH)):'
1091 @$(if $(archhelp),$(archhelp),\
1092 echo ' No architecture specific help defined for $(ARCH)')
1093 @echo ''
1094 @$(if $(boards), \
1095 $(foreach b, $(boards), \
1096 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1097 echo '')
1098
1099 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1100 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1101 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1102 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1103 @echo ''
1104 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1105 @echo 'For further info see the ./README file'
1106
1107
1108# Documentation targets
1109# ---------------------------------------------------------------------------
1110%docs: scripts_basic FORCE
1111 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1112
1113else # KBUILD_EXTMOD
1114
1115###
1116# External module support.
1117# When building external modules the kernel used as basis is considered
1118# read-only, and no consistency checks are made and the make
1119# system is not used on the basis kernel. If updates are required
1120# in the basis kernel ordinary make commands (without M=...) must
1121# be used.
1122#
1123# The following are the only valid targets when building external
1124# modules.
1125# make M=dir clean Delete all automatically generated files
1126# make M=dir modules Make all modules in specified dir
1127# make M=dir Same as 'make M=dir modules'
1128# make M=dir modules_install
1129# Install the modules build in the module directory
1130# Assumes install directory is already created
1131
1132# We are always building modules
1133KBUILD_MODULES := 1
1134.PHONY: crmodverdir
1135crmodverdir:
1136 $(Q)mkdir -p $(MODVERDIR)
1137
1138.PHONY: $(objtree)/Module.symvers
1139$(objtree)/Module.symvers:
1140 @test -e $(objtree)/Module.symvers || ( \
1141 echo; \
1142 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1143 echo " is missing; modules will have no dependencies and modversions."; \
1144 echo )
1145
1146module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1147.PHONY: $(module-dirs) modules
1148$(module-dirs): crmodverdir $(objtree)/Module.symvers
1149 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1150
1151modules: $(module-dirs)
1152 @echo ' Building modules, stage 2.';
1153 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1154
1155.PHONY: modules_install
1156modules_install:
1157 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1158
1159clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1160
1161.PHONY: $(clean-dirs) clean
1162$(clean-dirs):
1163 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1164
1165clean: rm-dirs := $(MODVERDIR)
1166clean: $(clean-dirs)
1167 $(call cmd,rmdirs)
1168 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1169 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1170 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1171 -type f -print | xargs rm -f
1172
1173help:
1174 @echo ' Building external modules.'
1175 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1176 @echo ''
1177 @echo ' modules - default target, build the module(s)'
1178 @echo ' modules_install - install the module'
1179 @echo ' clean - remove generated files in module directory only'
1180 @echo ''
1181endif # KBUILD_EXTMOD
1182
1183# Generate tags for editors
1184# ---------------------------------------------------------------------------
1185
1186#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1187#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1188#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1189
1190ifeq ($(src),$(obj))
1191__srctree =
1192else
1193__srctree = $(srctree)/
1194endif
1195
1196ifeq ($(ALLSOURCE_ARCHS),)
1197ifeq ($(ARCH),um)
1198ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1199else
1200ALLINCLUDE_ARCHS := $(ARCH)
1201endif
1202else
1203#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1204ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1205endif
1206
1207ALLSOURCE_ARCHS := $(ARCH)
1208
1209define all-sources
1210 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1211 \( -name include -o -name arch \) -prune -o \
1212 -name '*.[chS]' -print; \
1213 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1214 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1215 -name '*.[chS]' -print; \
1216 done ; \
1217 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1218 -name '*.[chS]' -print; \
1219 find $(__srctree)include $(RCS_FIND_IGNORE) \
1220 \( -name config -o -name 'asm-*' \) -prune \
1221 -o -name '*.[chS]' -print; \
1222 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1223 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1224 -name '*.[chS]' -print; \
1225 done ; \
1226 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1227 -name '*.[chS]' -print )
1228endef
1229
1230quiet_cmd_cscope-file = FILELST cscope.files
1231 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1232
1233quiet_cmd_cscope = MAKE cscope.out
1234 cmd_cscope = cscope -b
1235
1236cscope: FORCE
1237 $(call cmd,cscope-file)
1238 $(call cmd,cscope)
1239
1240quiet_cmd_TAGS = MAKE $@
1241define cmd_TAGS
1242 rm -f $@; \
1243 ETAGSF=`etags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1244 $(all-sources) | xargs etags $$ETAGSF -a
1245endef
1246
1247TAGS: FORCE
1248 $(call cmd,TAGS)
1249
1250
1251quiet_cmd_tags = MAKE $@
1252define cmd_tags
1253 rm -f $@; \
1254 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1255 $(all-sources) | xargs ctags $$CTAGSF -a
1256endef
1257
1258tags: FORCE
1259 $(call cmd,tags)
1260
1261
1262# Scripts to check various things for consistency
1263# ---------------------------------------------------------------------------
1264
1265includecheck:
1266 find * $(RCS_FIND_IGNORE) \
1267 -name '*.[hcS]' -type f -print | sort \
1268 | xargs $(PERL) -w scripts/checkincludes.pl
1269
1270versioncheck:
1271 find * $(RCS_FIND_IGNORE) \
1272 -name '*.[hcS]' -type f -print | sort \
1273 | xargs $(PERL) -w scripts/checkversion.pl
1274
1275buildcheck:
1276 $(PERL) $(srctree)/scripts/reference_discarded.pl
1277 $(PERL) $(srctree)/scripts/reference_init.pl
1278
1279namespacecheck:
1280 $(PERL) $(srctree)/scripts/namespace.pl
1281
1282endif #ifeq ($(config-targets),1)
1283endif #ifeq ($(mixed-targets),1)
1284
1285.PHONY: checkstack
1286checkstack:
1287 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1288 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1289
1290kernelrelease:
1291 @echo $(KERNELRELEASE)
1292
1293# FIXME Should go into a make.lib or something
1294# ===========================================================================
1295
1296quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1297 cmd_rmdirs = rm -rf $(rm-dirs)
1298
1299quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1300 cmd_rmfiles = rm -f $(rm-files)
1301
1302
1303a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1304 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1305 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1306
1307quiet_cmd_as_o_S = AS $@
1308cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1309
1310# read all saved command lines
1311
1312targets := $(wildcard $(sort $(targets)))
1313cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1314
1315ifneq ($(cmd_files),)
1316 $(cmd_files): ; # Do not try to update included dependency files
1317 include $(cmd_files)
1318endif
1319
1320# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1321# Usage:
1322# $(Q)$(MAKE) $(clean)=dir
1323clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1324
1325endif # skip-makefile
1326
1327FORCE: