blob: 9e005e18c71c4b7adc83a200e1ae10782c751920 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
3SUBLEVEL = 12
Linus Torvalds7cef5672005-06-06 08:22:29 -07004EXTRAVERSION =-rc6
Linus Torvalds1da177e2005-04-16 15:20:36 -07005NAME=Woozy Numbat
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) KBUILD_VERBOSE=$(KBUILD_VERBOSE) \
114 KBUILD_CHECK=$(KBUILD_CHECK) KBUILD_EXTMOD="$(KBUILD_EXTMOD)" \
115 -f $(CURDIR)/Makefile $@
116
117# Leave processing to above invocation of make
118skip-makefile := 1
119endif # ifneq ($(KBUILD_OUTPUT),)
120endif # ifeq ($(KBUILD_SRC),)
121
122# We process the rest of the Makefile if this is the final invocation of make
123ifeq ($(skip-makefile),)
124
125# If building an external module we do not care about the all: rule
126# but instead _all depend on modules
127.PHONY: all
128ifeq ($(KBUILD_EXTMOD),)
129_all: all
130else
131_all: modules
132endif
133
134srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
135TOPDIR := $(srctree)
136# FIXME - TOPDIR is obsolete, use srctree/objtree
137objtree := $(CURDIR)
138src := $(srctree)
139obj := $(objtree)
140
141VPATH := $(srctree)
142
143export srctree objtree VPATH TOPDIR
144
145nullstring :=
146space := $(nullstring) # end of line
147
148# Take the contents of any files called localversion* and the config
149# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be
150# careful not to include files twice if building in the source
151# directory. LOCALVERSION from the command line override all of this
152
153localver := $(objtree)/localversion* $(srctree)/localversion*
154localver := $(sort $(wildcard $(localver)))
155# skip backup files (containing '~')
156localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f)))
157
158LOCALVERSION = $(subst $(space),, \
159 $(shell cat /dev/null $(localver)) \
160 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
161
162KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION)
163
164# SUBARCH tells the usermode build what the underlying arch is. That is set
165# first, and if a usermode build is happening, the "ARCH=um" on the command
166# line overrides the setting of ARCH below. If a native build is happening,
167# then ARCH is assigned, getting whatever value it gets normally, and
168# SUBARCH is subsequently ignored.
169
170SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
171 -e s/arm.*/arm/ -e s/sa110/arm/ \
172 -e s/s390x/s390/ -e s/parisc64/parisc/ )
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 KBUILD_VERBOSE
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 gcc-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# For maximum performance (+ possibly random breakage, uncomment
313# the following)
314
315#MAKEFLAGS += -rR
316
317# Make variables (CC, etc...)
318
319AS = $(CROSS_COMPILE)as
320LD = $(CROSS_COMPILE)ld
321CC = $(CROSS_COMPILE)gcc
322CPP = $(CC) -E
323AR = $(CROSS_COMPILE)ar
324NM = $(CROSS_COMPILE)nm
325STRIP = $(CROSS_COMPILE)strip
326OBJCOPY = $(CROSS_COMPILE)objcopy
327OBJDUMP = $(CROSS_COMPILE)objdump
328AWK = awk
329GENKSYMS = scripts/genksyms/genksyms
330DEPMOD = /sbin/depmod
331KALLSYMS = scripts/kallsyms
332PERL = perl
333CHECK = sparse
334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336MODFLAGS = -DMODULE
337CFLAGS_MODULE = $(MODFLAGS)
338AFLAGS_MODULE = $(MODFLAGS)
339LDFLAGS_MODULE = -r
340CFLAGS_KERNEL =
341AFLAGS_KERNEL =
342
343
344# Use LINUXINCLUDE when you must reference the include/ directory.
345# Needed to be compatible with the O= option
346LINUXINCLUDE := -Iinclude \
347 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include)
348
349CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
350
351CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \
352 -fno-strict-aliasing -fno-common \
353 -ffreestanding
354AFLAGS := -D__ASSEMBLY__
355
356export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
357 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
358 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
359 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
360
361export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
362export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
363export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
364
365# When compiling out-of-tree modules, put MODVERDIR in the module
366# tree rather than in the kernel tree. The kernel tree might
367# even be read-only.
368export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
369
370# The temporary file to save gcc -MD generated dependencies must not
371# contain a comma
372comma := ,
373depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
374
375# Files to ignore in find ... statements
376
377RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o
378RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc
379
380# ===========================================================================
381# Rules shared between *config targets and build targets
382
383# Basic helpers built in scripts/
384.PHONY: scripts_basic
385scripts_basic:
386 $(Q)$(MAKE) $(build)=scripts/basic
387
388.PHONY: outputmakefile
389# outputmakefile generate a Makefile to be placed in output directory, if
390# using a seperate output directory. This allows convinient use
391# of make in output directory
392outputmakefile:
393 $(Q)if test ! $(srctree) -ef $(objtree); then \
394 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
395 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
396 > $(objtree)/Makefile; \
397 echo ' GEN $(objtree)/Makefile'; \
398 fi
399
400# To make sure we do not include .config for any of the *config targets
401# catch them early, and hand them over to scripts/kconfig/Makefile
402# It is allowed to specify more targets when calling make, including
403# mixing *config targets and build targets.
404# For example 'make oldconfig all'.
405# Detect when mixed targets is specified, and make a second invocation
406# of make so .config is not included in this case either (for *config).
407
408no-dot-config-targets := clean mrproper distclean \
409 cscope TAGS tags help %docs check%
410
411config-targets := 0
412mixed-targets := 0
413dot-config := 1
414
415ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
416 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
417 dot-config := 0
418 endif
419endif
420
421ifeq ($(KBUILD_EXTMOD),)
422 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
423 config-targets := 1
424 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
425 mixed-targets := 1
426 endif
427 endif
428endif
429
430ifeq ($(mixed-targets),1)
431# ===========================================================================
432# We're called with mixed targets (*config and build targets).
433# Handle them one by one.
434
435%:: FORCE
436 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
437
438else
439ifeq ($(config-targets),1)
440# ===========================================================================
441# *config targets only - make sure prerequisites are updated, and descend
442# in scripts/kconfig to make the *config target
443
444# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
445# KBUILD_DEFCONFIG may point out an alternative default configuration
446# used for 'make defconfig'
447include $(srctree)/arch/$(ARCH)/Makefile
448export KBUILD_DEFCONFIG
449
450config: scripts_basic outputmakefile FORCE
451 $(Q)$(MAKE) $(build)=scripts/kconfig $@
452%config: scripts_basic outputmakefile FORCE
453 $(Q)$(MAKE) $(build)=scripts/kconfig $@
454
455else
456# ===========================================================================
457# Build targets only - this includes vmlinux, arch specific targets, clean
458# targets and others. In general all targets except *config targets.
459
460ifeq ($(KBUILD_EXTMOD),)
461# Additional helpers built in scripts/
462# Carefully list dependencies so we do not try to build scripts twice
463# in parrallel
464.PHONY: scripts
465scripts: scripts_basic include/config/MARKER
466 $(Q)$(MAKE) $(build)=$(@)
467
468scripts_basic: include/linux/autoconf.h
469
470# Objects we will link into vmlinux / subdirs we need to visit
471init-y := init/
472drivers-y := drivers/ sound/
473net-y := net/
474libs-y := lib/
475core-y := usr/
476endif # KBUILD_EXTMOD
477
478ifeq ($(dot-config),1)
479# In this section, we need .config
480
481# Read in dependencies to all Kconfig* files, make sure to run
482# oldconfig if changes are detected.
483-include .config.cmd
484
485include .config
486
487# If .config needs to be updated, it will be done via the dependency
488# that autoconf has on .config.
489# To avoid any implicit rule to kick in, define an empty command
490.config: ;
491
492# If .config is newer than include/linux/autoconf.h, someone tinkered
493# with it and forgot to run make oldconfig
494include/linux/autoconf.h: .config
495 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
496else
497# Dummy target needed, because used as prerequisite
498include/linux/autoconf.h: ;
499endif
500
501# The all: target is the default when no target is given on the
502# command line.
503# This allow a user to issue only 'make' to build a kernel including modules
504# Defaults vmlinux but it is usually overriden in the arch makefile
505all: vmlinux
506
507ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
508CFLAGS += -Os
509else
510CFLAGS += -O2
511endif
512
513#Add align options if CONFIG_CC_* is not equal to 0
514add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
515CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
516CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
517CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
518CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
519
520ifdef CONFIG_FRAME_POINTER
521CFLAGS += -fno-omit-frame-pointer
522else
523CFLAGS += -fomit-frame-pointer
524endif
525
526ifdef CONFIG_DEBUG_INFO
527CFLAGS += -g
528endif
529
530include $(srctree)/arch/$(ARCH)/Makefile
531
Sam Ravnborge8e69932005-04-30 16:51:42 -0700532# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700533NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700534CHECKFLAGS += $(NOSTDINC_FLAGS)
535
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536# warn about C99 declaration after statement
537CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
538
539# disable pointer signedness warnings in gcc 4.0
540CFLAGS += $(call cc-option,-Wno-pointer-sign,)
541
542# Default kernel image to build when no specific target is given.
543# KBUILD_IMAGE may be overruled on the commandline or
544# set in the environment
545# Also any assignments in arch/$(ARCH)/Makefile take precedence over
546# this default value
547export KBUILD_IMAGE ?= vmlinux
548
549#
550# INSTALL_PATH specifies where to place the updated kernel and system map
551# images. Default is /boot, but you can set it to other values
552export INSTALL_PATH ?= /boot
553
554#
555# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
556# relocations required by build roots. This is not defined in the
557# makefile but the arguement can be passed to make if needed.
558#
559
560MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
561export MODLIB
562
563
564ifeq ($(KBUILD_EXTMOD),)
565core-y += kernel/ mm/ fs/ ipc/ security/ crypto/
566
567vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
568 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
569 $(net-y) $(net-m) $(libs-y) $(libs-m)))
570
571vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
572 $(init-n) $(init-) \
573 $(core-n) $(core-) $(drivers-n) $(drivers-) \
574 $(net-n) $(net-) $(libs-n) $(libs-))))
575
576init-y := $(patsubst %/, %/built-in.o, $(init-y))
577core-y := $(patsubst %/, %/built-in.o, $(core-y))
578drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
579net-y := $(patsubst %/, %/built-in.o, $(net-y))
580libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
581libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
582libs-y := $(libs-y1) $(libs-y2)
583
584# Build vmlinux
585# ---------------------------------------------------------------------------
586# vmlinux is build from the objects selected by $(vmlinux-init) and
587# $(vmlinux-main). Most are built-in.o files from top-level directories
588# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
589# Ordering when linking is important, and $(vmlinux-init) must be first.
590#
591# vmlinux
592# ^
593# |
594# +-< $(vmlinux-init)
595# | +--< init/version.o + more
596# |
597# +--< $(vmlinux-main)
598# | +--< driver/built-in.o mm/built-in.o + more
599# |
600# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
601#
602# vmlinux version (uname -v) cannot be updated during normal
603# descending-into-subdirs phase since we do not yet know if we need to
604# update vmlinux.
605# Therefore this step is delayed until just before final link of vmlinux -
606# except in the kallsyms case where it is done just before adding the
607# symbols to the kernel.
608#
609# System.map is generated to document addresses of all kernel symbols
610
611vmlinux-init := $(head-y) $(init-y)
612vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
613vmlinux-all := $(vmlinux-init) $(vmlinux-main)
614vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
615
616# Rule to link vmlinux - also used during CONFIG_KALLSYMS
617# May be overridden by arch/$(ARCH)/Makefile
618quiet_cmd_vmlinux__ ?= LD $@
619 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
620 -T $(vmlinux-lds) $(vmlinux-init) \
621 --start-group $(vmlinux-main) --end-group \
622 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
623
624# Generate new vmlinux version
625quiet_cmd_vmlinux_version = GEN .version
626 cmd_vmlinux_version = set -e; \
627 . $(srctree)/scripts/mkversion > .tmp_version; \
628 mv -f .tmp_version .version; \
629 $(MAKE) $(build)=init
630
631# Generate System.map
632quiet_cmd_sysmap = SYSMAP
633 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
634
635# Link of vmlinux
636# If CONFIG_KALLSYMS is set .version is already updated
637# Generate System.map and verify that the content is consistent
638
639define rule_vmlinux__
640 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
641
642 $(call cmd,vmlinux__)
643 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
644
645 $(Q)$(if $($(quiet)cmd_sysmap), \
646 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
647 $(cmd_sysmap) $@ System.map; \
648 if [ $$? -ne 0 ]; then \
649 rm -f $@; \
650 /bin/false; \
651 fi;
652 $(verify_kallsyms)
653endef
654
655
656ifdef CONFIG_KALLSYMS
657# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
658# It's a three stage process:
659# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
660# empty
661# Running kallsyms on that gives us .tmp_kallsyms1.o with
662# the right size - vmlinux version (uname -v) is updated during this step
663# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
664# but due to the added section, some addresses have shifted.
665# From here, we generate a correct .tmp_kallsyms2.o
666# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
667# o Verify that the System.map from vmlinux matches the map from
668# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
669# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
670# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
671# temporary bypass to allow the kernel to be built while the
672# maintainers work out what went wrong with kallsyms.
673
674ifdef CONFIG_KALLSYMS_EXTRA_PASS
675last_kallsyms := 3
676else
677last_kallsyms := 2
678endif
679
680kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
681
682define verify_kallsyms
683 $(Q)$(if $($(quiet)cmd_sysmap), \
684 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
685 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
686 $(Q)cmp -s System.map .tmp_System.map || \
687 (echo Inconsistent kallsyms data; \
688 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
689 rm .tmp_kallsyms* ; /bin/false )
690endef
691
692# Update vmlinux version before link
693# Use + in front of this rule to silent warning about make -j1
694cmd_ksym_ld = $(cmd_vmlinux__)
695define rule_ksym_ld
696 +$(call cmd,vmlinux_version)
697 $(call cmd,vmlinux__)
698 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
699endef
700
701# Generate .S file with all kernel symbols
702quiet_cmd_kallsyms = KSYM $@
703 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
704 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
705
706.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
707 $(call if_changed_dep,as_o_S)
708
709.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
710 $(call cmd,kallsyms)
711
712# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
713.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
714 $(call if_changed_rule,ksym_ld)
715
716.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
717 $(call if_changed,vmlinux__)
718
719.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
720 $(call if_changed,vmlinux__)
721
722# Needs to visit scripts/ before $(KALLSYMS) can be used.
723$(KALLSYMS): scripts ;
724
725endif # ifdef CONFIG_KALLSYMS
726
727# vmlinux image - including updated kernel symbols
728vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
729 $(call if_changed_rule,vmlinux__)
730
731# The actual objects are generated when descending,
732# make sure no implicit rule kicks in
733$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
734
735# Handle descending into subdirectories listed in $(vmlinux-dirs)
736# Preset locale variables to speed up the build process. Limit locale
737# tweaks to this spot to avoid wrong language settings when running
738# make menuconfig etc.
739# Error messages still appears in the original language
740
741.PHONY: $(vmlinux-dirs)
742$(vmlinux-dirs): prepare-all scripts
743 $(Q)$(MAKE) $(build)=$@
744
745# Things we need to do before we recursively start building the kernel
746# or the modules are listed in "prepare-all".
747# A multi level approach is used. prepare1 is updated first, then prepare0.
748# prepare-all is the collection point for the prepare targets.
749
750.PHONY: prepare-all prepare prepare0 prepare1 prepare2
751
752# prepare2 is used to check if we are building in a separate output directory,
753# and if so do:
754# 1) Check that make has not been executed in the kernel src $(srctree)
755# 2) Create the include2 directory, used for the second asm symlink
756
757prepare2:
758ifneq ($(KBUILD_SRC),)
759 @echo ' Using $(srctree) as source for kernel'
760 $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \
761 echo " $(srctree) is not clean, please run 'make mrproper'";\
762 echo " in the '$(srctree)' directory.";\
763 /bin/false; \
764 fi;
765 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
766 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
767endif
768
769# prepare1 creates a makefile if using a separate output directory
770prepare1: prepare2 outputmakefile
771
772prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER
773ifneq ($(KBUILD_MODULES),)
774 $(Q)rm -rf $(MODVERDIR)
775 $(Q)mkdir -p $(MODVERDIR)
776endif
777
778# All the preparing..
779prepare-all: prepare0 prepare
780
781# Leave this as default for preprocessing vmlinux.lds.S, which is now
782# done in arch/$(ARCH)/kernel/Makefile
783
784export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
785
786# Single targets
787# ---------------------------------------------------------------------------
788
789%.s: %.c scripts FORCE
790 $(Q)$(MAKE) $(build)=$(@D) $@
791%.i: %.c scripts FORCE
792 $(Q)$(MAKE) $(build)=$(@D) $@
793%.o: %.c scripts FORCE
794 $(Q)$(MAKE) $(build)=$(@D) $@
795%/: scripts prepare FORCE
796 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
797%.lst: %.c scripts FORCE
798 $(Q)$(MAKE) $(build)=$(@D) $@
799%.s: %.S scripts FORCE
800 $(Q)$(MAKE) $(build)=$(@D) $@
801%.o: %.S scripts FORCE
802 $(Q)$(MAKE) $(build)=$(@D) $@
803
804# FIXME: The asm symlink changes when $(ARCH) changes. That's
805# hard to detect, but I suppose "make mrproper" is a good idea
806# before switching between archs anyway.
807
808include/asm:
809 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
810 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
811 @ln -fsn asm-$(ARCH) $@
812
813# Split autoconf.h into include/linux/config/*
814
815include/config/MARKER: include/linux/autoconf.h
816 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
817 @scripts/basic/split-include include/linux/autoconf.h include/config
818 @touch $@
819
820# Generate some files
821# ---------------------------------------------------------------------------
822
823# KERNELRELEASE can change from a few different places, meaning version.h
824# needs to be updated, so this check is forced on all builds
825
826uts_len := 64
827
828define filechk_version.h
829 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
830 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
831 exit 1; \
832 fi; \
833 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
834 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
835 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
836 )
837endef
838
839include/linux/version.h: $(srctree)/Makefile FORCE
840 $(call filechk,version.h)
841
842# ---------------------------------------------------------------------------
843
844.PHONY: depend dep
845depend dep:
846 @echo '*** Warning: make $@ is unnecessary now.'
847
848# ---------------------------------------------------------------------------
849# Modules
850
851ifdef CONFIG_MODULES
852
853# By default, build modules as well
854
855all: modules
856
857# Build modules
858
859.PHONY: modules
860modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
861 @echo ' Building modules, stage 2.';
862 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
863
864
865# Target to prepare building external modules
866.PHONY: modules_prepare
867modules_prepare: prepare-all scripts
868
869# Target to install modules
870.PHONY: modules_install
871modules_install: _modinst_ _modinst_post
872
873.PHONY: _modinst_
874_modinst_:
875 @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \
876 echo "Warning: you may need to install module-init-tools"; \
877 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
878 sleep 1; \
879 fi
880 @rm -rf $(MODLIB)/kernel
881 @rm -f $(MODLIB)/source
882 @mkdir -p $(MODLIB)/kernel
883 @ln -s $(srctree) $(MODLIB)/source
884 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
885 rm -f $(MODLIB)/build ; \
886 ln -s $(objtree) $(MODLIB)/build ; \
887 fi
888 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
889
890# If System.map exists, run depmod. This deliberately does not have a
891# dependency on System.map since that would run the dependency tree on
892# vmlinux. This depmod is only for convenience to give the initial
893# boot a modules.dep even before / is mounted read-write. However the
894# boot script depmod is the master version.
895ifeq "$(strip $(INSTALL_MOD_PATH))" ""
896depmod_opts :=
897else
898depmod_opts := -b $(INSTALL_MOD_PATH) -r
899endif
900.PHONY: _modinst_post
901_modinst_post: _modinst_
902 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
903
904else # CONFIG_MODULES
905
906# Modules not configured
907# ---------------------------------------------------------------------------
908
909modules modules_install: FORCE
910 @echo
911 @echo "The present kernel configuration has modules disabled."
912 @echo "Type 'make config' and enable loadable module support."
913 @echo "Then build a kernel with module support enabled."
914 @echo
915 @exit 1
916
917endif # CONFIG_MODULES
918
919# Generate asm-offsets.h
920# ---------------------------------------------------------------------------
921
922define filechk_gen-asm-offsets
923 (set -e; \
924 echo "#ifndef __ASM_OFFSETS_H__"; \
925 echo "#define __ASM_OFFSETS_H__"; \
926 echo "/*"; \
927 echo " * DO NOT MODIFY."; \
928 echo " *"; \
929 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
930 echo " *"; \
931 echo " */"; \
932 echo ""; \
933 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
934 echo ""; \
935 echo "#endif" )
936endef
937
938
939###
940# Cleaning is done on three levels.
941# make clean Delete most generated files
942# Leave enough to build external modules
943# make mrproper Delete the current configuration, and all generated files
944# make distclean Remove editor backup files, patch leftover files and the like
945
946# Directories & files removed with 'make clean'
947CLEAN_DIRS += $(MODVERDIR)
948CLEAN_FILES += vmlinux System.map \
949 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
950
951# Directories & files removed with 'make mrproper'
952MRPROPER_DIRS += include/config include2
953MRPROPER_FILES += .config .config.old include/asm .version \
954 include/linux/autoconf.h include/linux/version.h \
955 Module.symvers tags TAGS cscope*
956
957# clean - Delete most, but leave enough to build external modules
958#
959clean: rm-dirs := $(CLEAN_DIRS)
960clean: rm-files := $(CLEAN_FILES)
961clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs))
962
963.PHONY: $(clean-dirs) clean archclean
964$(clean-dirs):
965 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
966
967clean: archclean $(clean-dirs)
968 $(call cmd,rmdirs)
969 $(call cmd,rmfiles)
970 @find . $(RCS_FIND_IGNORE) \
971 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
972 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
973 -type f -print | xargs rm -f
974
975# mrproper - Delete all generated files, including .config
976#
977mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
978mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
979mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
980
981.PHONY: $(mrproper-dirs) mrproper archmrproper
982$(mrproper-dirs):
983 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
984
985mrproper: clean archmrproper $(mrproper-dirs)
986 $(call cmd,rmdirs)
987 $(call cmd,rmfiles)
988
989# distclean
990#
991.PHONY: distclean
992
993distclean: mrproper
994 @find $(srctree) $(RCS_FIND_IGNORE) \
995 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
996 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
997 -o -name '.*.rej' -o -size 0 \
998 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
999 -type f -print | xargs rm -f
1000
1001
1002# Packaging of the kernel to various formats
1003# ---------------------------------------------------------------------------
1004# rpm target kept for backward compatibility
1005package-dir := $(srctree)/scripts/package
1006
1007.PHONY: %-pkg rpm
1008
1009%pkg: FORCE
1010 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1011rpm: FORCE
1012 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1013
1014
1015# Brief documentation of the typical targets used
1016# ---------------------------------------------------------------------------
1017
1018boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1019boards := $(notdir $(boards))
1020
1021help:
1022 @echo 'Cleaning targets:'
1023 @echo ' clean - remove most generated files but keep the config'
1024 @echo ' mrproper - remove all generated files + config + various backup files'
1025 @echo ''
1026 @echo 'Configuration targets:'
1027 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1028 @echo ''
1029 @echo 'Other generic targets:'
1030 @echo ' all - Build all targets marked with [*]'
1031 @echo '* vmlinux - Build the bare kernel'
1032 @echo '* modules - Build all modules'
1033 @echo ' modules_install - Install all modules'
1034 @echo ' dir/ - Build all files in dir and below'
1035 @echo ' dir/file.[ois] - Build specified target only'
1036 @echo ' rpm - Build a kernel as an RPM package'
1037 @echo ' tags/TAGS - Generate tags file for editors'
1038 @echo ' cscope - Generate cscope index'
1039 @echo ''
1040 @echo 'Static analysers'
1041 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1042 @echo ' and init sections from non-init sections'
1043 @echo ' checkstack - Generate a list of stack hogs'
1044 @echo ' namespacecheck - Name space analysis on compiled kernel'
1045 @echo ''
1046 @echo 'Kernel packaging:'
1047 @$(MAKE) -f $(package-dir)/Makefile help
1048 @echo ''
1049 @echo 'Documentation targets:'
1050 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1051 @echo ''
1052 @echo 'Architecture specific targets ($(ARCH)):'
1053 @$(if $(archhelp),$(archhelp),\
1054 echo ' No architecture specific help defined for $(ARCH)')
1055 @echo ''
1056 @$(if $(boards), \
1057 $(foreach b, $(boards), \
1058 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1059 echo '')
1060
1061 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1062 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1063 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1064 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1065 @echo ''
1066 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1067 @echo 'For further info see the ./README file'
1068
1069
1070# Documentation targets
1071# ---------------------------------------------------------------------------
1072%docs: scripts_basic FORCE
1073 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1074
1075else # KBUILD_EXTMOD
1076
1077###
1078# External module support.
1079# When building external modules the kernel used as basis is considered
1080# read-only, and no consistency checks are made and the make
1081# system is not used on the basis kernel. If updates are required
1082# in the basis kernel ordinary make commands (without M=...) must
1083# be used.
1084#
1085# The following are the only valid targets when building external
1086# modules.
1087# make M=dir clean Delete all automatically generated files
1088# make M=dir modules Make all modules in specified dir
1089# make M=dir Same as 'make M=dir modules'
1090# make M=dir modules_install
1091# Install the modules build in the module directory
1092# Assumes install directory is already created
1093
1094# We are always building modules
1095KBUILD_MODULES := 1
1096.PHONY: crmodverdir
1097crmodverdir:
1098 $(Q)mkdir -p $(MODVERDIR)
1099
1100.PHONY: $(objtree)/Module.symvers
1101$(objtree)/Module.symvers:
1102 @test -e $(objtree)/Module.symvers || ( \
1103 echo; \
1104 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1105 echo " is missing; modules will have no dependencies and modversions."; \
1106 echo )
1107
1108module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1109.PHONY: $(module-dirs) modules
1110$(module-dirs): crmodverdir $(objtree)/Module.symvers
1111 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1112
1113modules: $(module-dirs)
1114 @echo ' Building modules, stage 2.';
1115 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1116
1117.PHONY: modules_install
1118modules_install:
1119 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1120
1121clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1122
1123.PHONY: $(clean-dirs) clean
1124$(clean-dirs):
1125 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1126
1127clean: rm-dirs := $(MODVERDIR)
1128clean: $(clean-dirs)
1129 $(call cmd,rmdirs)
1130 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1131 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1132 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1133 -type f -print | xargs rm -f
1134
1135help:
1136 @echo ' Building external modules.'
1137 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1138 @echo ''
1139 @echo ' modules - default target, build the module(s)'
1140 @echo ' modules_install - install the module'
1141 @echo ' clean - remove generated files in module directory only'
1142 @echo ''
1143endif # KBUILD_EXTMOD
1144
1145# Generate tags for editors
1146# ---------------------------------------------------------------------------
1147
1148#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1149#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1150#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1151
1152ifeq ($(KBUILD_OUTPUT),)
1153__srctree =
1154else
1155__srctree = $(srctree)/
1156endif
1157
1158define all-sources
1159 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1160 \( -name include -o -name arch \) -prune -o \
1161 -name '*.[chS]' -print; \
1162 find $(__srctree)arch/$(ARCH) $(RCS_FIND_IGNORE) \
1163 -name '*.[chS]' -print; \
1164 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1165 -name '*.[chS]' -print; \
1166 find $(__srctree)include $(RCS_FIND_IGNORE) \
1167 \( -name config -o -name 'asm-*' \) -prune \
1168 -o -name '*.[chS]' -print; \
1169 find $(__srctree)include/asm-$(ARCH) $(RCS_FIND_IGNORE) \
1170 -name '*.[chS]' -print; \
1171 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1172 -name '*.[chS]' -print )
1173endef
1174
1175quiet_cmd_cscope-file = FILELST cscope.files
1176 cmd_cscope-file = $(all-sources) > cscope.files
1177
1178quiet_cmd_cscope = MAKE cscope.out
1179 cmd_cscope = cscope -k -b -q
1180
1181cscope: FORCE
1182 $(call cmd,cscope-file)
1183 $(call cmd,cscope)
1184
1185quiet_cmd_TAGS = MAKE $@
1186cmd_TAGS = $(all-sources) | etags -
1187
1188# Exuberant ctags works better with -I
1189
1190quiet_cmd_tags = MAKE $@
1191define cmd_tags
1192 rm -f $@; \
Emanuele Giaquintaefcd5e32005-05-01 08:59:15 -07001193 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1194 $(all-sources) | xargs ctags $$CTAGSF -a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195endef
1196
1197TAGS: FORCE
1198 $(call cmd,TAGS)
1199
1200tags: FORCE
1201 $(call cmd,tags)
1202
1203
1204# Scripts to check various things for consistency
1205# ---------------------------------------------------------------------------
1206
1207configcheck:
1208 find * $(RCS_FIND_IGNORE) \
1209 -name '*.[hcS]' -type f -print | sort \
1210 | xargs $(PERL) -w scripts/checkconfig.pl
1211
1212includecheck:
1213 find * $(RCS_FIND_IGNORE) \
1214 -name '*.[hcS]' -type f -print | sort \
1215 | xargs $(PERL) -w scripts/checkincludes.pl
1216
1217versioncheck:
1218 find * $(RCS_FIND_IGNORE) \
1219 -name '*.[hcS]' -type f -print | sort \
1220 | xargs $(PERL) -w scripts/checkversion.pl
1221
1222buildcheck:
1223 $(PERL) $(srctree)/scripts/reference_discarded.pl
1224 $(PERL) $(srctree)/scripts/reference_init.pl
1225
1226namespacecheck:
1227 $(PERL) $(srctree)/scripts/namespace.pl
1228
1229endif #ifeq ($(config-targets),1)
1230endif #ifeq ($(mixed-targets),1)
1231
1232.PHONY: checkstack
1233checkstack:
1234 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1235 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1236
1237kernelrelease:
1238 @echo $(KERNELRELEASE)
1239
1240# FIXME Should go into a make.lib or something
1241# ===========================================================================
1242
1243quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1244 cmd_rmdirs = rm -rf $(rm-dirs)
1245
1246quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1247 cmd_rmfiles = rm -f $(rm-files)
1248
1249
1250a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1251 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1252 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1253
1254quiet_cmd_as_o_S = AS $@
1255cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1256
1257# read all saved command lines
1258
1259targets := $(wildcard $(sort $(targets)))
1260cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1261
1262ifneq ($(cmd_files),)
1263 $(cmd_files): ; # Do not try to update included dependency files
1264 include $(cmd_files)
1265endif
1266
1267# Execute command and generate cmd file
1268if_changed = $(if $(strip $? \
1269 $(filter-out $(cmd_$(1)),$(cmd_$@))\
1270 $(filter-out $(cmd_$@),$(cmd_$(1)))),\
1271 @set -e; \
1272 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
1273 $(cmd_$(1)); \
1274 echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd)
1275
1276
1277# execute the command and also postprocess generated .d dependencies
1278# file
1279if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
1280 $(filter-out $(cmd_$(1)),$(cmd_$@))\
1281 $(filter-out $(cmd_$@),$(cmd_$(1)))),\
1282 $(Q)set -e; \
1283 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
1284 $(cmd_$(1)); \
1285 scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
1286 rm -f $(depfile); \
1287 mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
1288
1289# Usage: $(call if_changed_rule,foo)
1290# will check if $(cmd_foo) changed, or any of the prequisites changed,
1291# and if so will execute $(rule_foo)
1292
1293if_changed_rule = $(if $(strip $? \
1294 $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
1295 $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
1296 $(Q)$(rule_$(1)))
1297
1298# If quiet is set, only print short version of command
1299
1300cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
1301
1302# filechk is used to check if the content of a generated file is updated.
1303# Sample usage:
1304# define filechk_sample
1305# echo $KERNELRELEASE
1306# endef
1307# version.h : Makefile
1308# $(call filechk,sample)
1309# The rule defined shall write to stdout the content of the new file.
1310# The existing file will be compared with the new one.
1311# - If no file exist it is created
1312# - If the content differ the new file is used
1313# - If they are equal no change, and no timestamp update
1314
1315define filechk
1316 @set -e; \
1317 echo ' CHK $@'; \
1318 mkdir -p $(dir $@); \
1319 $(filechk_$(1)) < $< > $@.tmp; \
1320 if [ -r $@ ] && cmp -s $@ $@.tmp; then \
1321 rm -f $@.tmp; \
1322 else \
1323 echo ' UPD $@'; \
1324 mv -f $@.tmp $@; \
1325 fi
1326endef
1327
1328# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir
1329# Usage:
1330# $(Q)$(MAKE) $(build)=dir
1331build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
1332
1333# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1334# Usage:
1335# $(Q)$(MAKE) $(clean)=dir
1336clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1337
1338# $(call descend,<dir>,<target>)
1339# Recursively call a sub-make in <dir> with target <target>
1340# Usage is deprecated, because make does not see this as an invocation of make.
1341descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2)
1342
1343endif # skip-makefile
1344
1345FORCE: