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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
3SUBLEVEL = 12
Linus Torvaldsa2755a82005-04-20 16:24:21 -07004EXTRAVERSION =-rc3
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
335NOSTDINC_FLAGS = -nostdinc -isystem $(shell $(CC) -print-file-name=include)
336CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__
337CHECKFLAGS += $(NOSTDINC_FLAGS)
338MODFLAGS = -DMODULE
339CFLAGS_MODULE = $(MODFLAGS)
340AFLAGS_MODULE = $(MODFLAGS)
341LDFLAGS_MODULE = -r
342CFLAGS_KERNEL =
343AFLAGS_KERNEL =
344
345
346# Use LINUXINCLUDE when you must reference the include/ directory.
347# Needed to be compatible with the O= option
348LINUXINCLUDE := -Iinclude \
349 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include)
350
351CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
352
353CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \
354 -fno-strict-aliasing -fno-common \
355 -ffreestanding
356AFLAGS := -D__ASSEMBLY__
357
358export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
359 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
360 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
361 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
362
363export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
364export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
365export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
366
367# When compiling out-of-tree modules, put MODVERDIR in the module
368# tree rather than in the kernel tree. The kernel tree might
369# even be read-only.
370export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
371
372# The temporary file to save gcc -MD generated dependencies must not
373# contain a comma
374comma := ,
375depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
376
377# Files to ignore in find ... statements
378
379RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o
380RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc
381
382# ===========================================================================
383# Rules shared between *config targets and build targets
384
385# Basic helpers built in scripts/
386.PHONY: scripts_basic
387scripts_basic:
388 $(Q)$(MAKE) $(build)=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: scripts_basic outputmakefile FORCE
453 $(Q)$(MAKE) $(build)=scripts/kconfig $@
454%config: scripts_basic outputmakefile FORCE
455 $(Q)$(MAKE) $(build)=scripts/kconfig $@
456
457else
458# ===========================================================================
459# Build targets only - this includes vmlinux, arch specific targets, clean
460# targets and others. In general all targets except *config targets.
461
462ifeq ($(KBUILD_EXTMOD),)
463# Additional helpers built in scripts/
464# Carefully list dependencies so we do not try to build scripts twice
465# in parrallel
466.PHONY: scripts
467scripts: scripts_basic include/config/MARKER
468 $(Q)$(MAKE) $(build)=$(@)
469
470scripts_basic: include/linux/autoconf.h
471
472# Objects we will link into vmlinux / subdirs we need to visit
473init-y := init/
474drivers-y := drivers/ sound/
475net-y := net/
476libs-y := lib/
477core-y := usr/
478endif # KBUILD_EXTMOD
479
480ifeq ($(dot-config),1)
481# In this section, we need .config
482
483# Read in dependencies to all Kconfig* files, make sure to run
484# oldconfig if changes are detected.
485-include .config.cmd
486
487include .config
488
489# If .config needs to be updated, it will be done via the dependency
490# that autoconf has on .config.
491# To avoid any implicit rule to kick in, define an empty command
492.config: ;
493
494# If .config is newer than include/linux/autoconf.h, someone tinkered
495# with it and forgot to run make oldconfig
496include/linux/autoconf.h: .config
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
524else
525CFLAGS += -fomit-frame-pointer
526endif
527
528ifdef CONFIG_DEBUG_INFO
529CFLAGS += -g
530endif
531
532include $(srctree)/arch/$(ARCH)/Makefile
533
534# warn about C99 declaration after statement
535CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
536
537# disable pointer signedness warnings in gcc 4.0
538CFLAGS += $(call cc-option,-Wno-pointer-sign,)
539
540# Default kernel image to build when no specific target is given.
541# KBUILD_IMAGE may be overruled on the commandline or
542# set in the environment
543# Also any assignments in arch/$(ARCH)/Makefile take precedence over
544# this default value
545export KBUILD_IMAGE ?= vmlinux
546
547#
548# INSTALL_PATH specifies where to place the updated kernel and system map
549# images. Default is /boot, but you can set it to other values
550export INSTALL_PATH ?= /boot
551
552#
553# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
554# relocations required by build roots. This is not defined in the
555# makefile but the arguement can be passed to make if needed.
556#
557
558MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
559export MODLIB
560
561
562ifeq ($(KBUILD_EXTMOD),)
563core-y += kernel/ mm/ fs/ ipc/ security/ crypto/
564
565vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
566 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
567 $(net-y) $(net-m) $(libs-y) $(libs-m)))
568
569vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
570 $(init-n) $(init-) \
571 $(core-n) $(core-) $(drivers-n) $(drivers-) \
572 $(net-n) $(net-) $(libs-n) $(libs-))))
573
574init-y := $(patsubst %/, %/built-in.o, $(init-y))
575core-y := $(patsubst %/, %/built-in.o, $(core-y))
576drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
577net-y := $(patsubst %/, %/built-in.o, $(net-y))
578libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
579libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
580libs-y := $(libs-y1) $(libs-y2)
581
582# Build vmlinux
583# ---------------------------------------------------------------------------
584# vmlinux is build from the objects selected by $(vmlinux-init) and
585# $(vmlinux-main). Most are built-in.o files from top-level directories
586# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
587# Ordering when linking is important, and $(vmlinux-init) must be first.
588#
589# vmlinux
590# ^
591# |
592# +-< $(vmlinux-init)
593# | +--< init/version.o + more
594# |
595# +--< $(vmlinux-main)
596# | +--< driver/built-in.o mm/built-in.o + more
597# |
598# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
599#
600# vmlinux version (uname -v) cannot be updated during normal
601# descending-into-subdirs phase since we do not yet know if we need to
602# update vmlinux.
603# Therefore this step is delayed until just before final link of vmlinux -
604# except in the kallsyms case where it is done just before adding the
605# symbols to the kernel.
606#
607# System.map is generated to document addresses of all kernel symbols
608
609vmlinux-init := $(head-y) $(init-y)
610vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
611vmlinux-all := $(vmlinux-init) $(vmlinux-main)
612vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
613
614# Rule to link vmlinux - also used during CONFIG_KALLSYMS
615# May be overridden by arch/$(ARCH)/Makefile
616quiet_cmd_vmlinux__ ?= LD $@
617 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
618 -T $(vmlinux-lds) $(vmlinux-init) \
619 --start-group $(vmlinux-main) --end-group \
620 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
621
622# Generate new vmlinux version
623quiet_cmd_vmlinux_version = GEN .version
624 cmd_vmlinux_version = set -e; \
625 . $(srctree)/scripts/mkversion > .tmp_version; \
626 mv -f .tmp_version .version; \
627 $(MAKE) $(build)=init
628
629# Generate System.map
630quiet_cmd_sysmap = SYSMAP
631 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
632
633# Link of vmlinux
634# If CONFIG_KALLSYMS is set .version is already updated
635# Generate System.map and verify that the content is consistent
636
637define rule_vmlinux__
638 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
639
640 $(call cmd,vmlinux__)
641 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
642
643 $(Q)$(if $($(quiet)cmd_sysmap), \
644 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
645 $(cmd_sysmap) $@ System.map; \
646 if [ $$? -ne 0 ]; then \
647 rm -f $@; \
648 /bin/false; \
649 fi;
650 $(verify_kallsyms)
651endef
652
653
654ifdef CONFIG_KALLSYMS
655# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
656# It's a three stage process:
657# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
658# empty
659# Running kallsyms on that gives us .tmp_kallsyms1.o with
660# the right size - vmlinux version (uname -v) is updated during this step
661# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
662# but due to the added section, some addresses have shifted.
663# From here, we generate a correct .tmp_kallsyms2.o
664# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
665# o Verify that the System.map from vmlinux matches the map from
666# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
667# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
668# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
669# temporary bypass to allow the kernel to be built while the
670# maintainers work out what went wrong with kallsyms.
671
672ifdef CONFIG_KALLSYMS_EXTRA_PASS
673last_kallsyms := 3
674else
675last_kallsyms := 2
676endif
677
678kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
679
680define verify_kallsyms
681 $(Q)$(if $($(quiet)cmd_sysmap), \
682 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
683 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
684 $(Q)cmp -s System.map .tmp_System.map || \
685 (echo Inconsistent kallsyms data; \
686 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
687 rm .tmp_kallsyms* ; /bin/false )
688endef
689
690# Update vmlinux version before link
691# Use + in front of this rule to silent warning about make -j1
692cmd_ksym_ld = $(cmd_vmlinux__)
693define rule_ksym_ld
694 +$(call cmd,vmlinux_version)
695 $(call cmd,vmlinux__)
696 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
697endef
698
699# Generate .S file with all kernel symbols
700quiet_cmd_kallsyms = KSYM $@
701 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
702 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
703
704.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
705 $(call if_changed_dep,as_o_S)
706
707.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
708 $(call cmd,kallsyms)
709
710# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
711.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
712 $(call if_changed_rule,ksym_ld)
713
714.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
715 $(call if_changed,vmlinux__)
716
717.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
718 $(call if_changed,vmlinux__)
719
720# Needs to visit scripts/ before $(KALLSYMS) can be used.
721$(KALLSYMS): scripts ;
722
723endif # ifdef CONFIG_KALLSYMS
724
725# vmlinux image - including updated kernel symbols
726vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
727 $(call if_changed_rule,vmlinux__)
728
729# The actual objects are generated when descending,
730# make sure no implicit rule kicks in
731$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
732
733# Handle descending into subdirectories listed in $(vmlinux-dirs)
734# Preset locale variables to speed up the build process. Limit locale
735# tweaks to this spot to avoid wrong language settings when running
736# make menuconfig etc.
737# Error messages still appears in the original language
738
739.PHONY: $(vmlinux-dirs)
740$(vmlinux-dirs): prepare-all scripts
741 $(Q)$(MAKE) $(build)=$@
742
743# Things we need to do before we recursively start building the kernel
744# or the modules are listed in "prepare-all".
745# A multi level approach is used. prepare1 is updated first, then prepare0.
746# prepare-all is the collection point for the prepare targets.
747
748.PHONY: prepare-all prepare prepare0 prepare1 prepare2
749
750# prepare2 is used to check if we are building in a separate output directory,
751# and if so do:
752# 1) Check that make has not been executed in the kernel src $(srctree)
753# 2) Create the include2 directory, used for the second asm symlink
754
755prepare2:
756ifneq ($(KBUILD_SRC),)
757 @echo ' Using $(srctree) as source for kernel'
758 $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \
759 echo " $(srctree) is not clean, please run 'make mrproper'";\
760 echo " in the '$(srctree)' directory.";\
761 /bin/false; \
762 fi;
763 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
764 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
765endif
766
767# prepare1 creates a makefile if using a separate output directory
768prepare1: prepare2 outputmakefile
769
770prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER
771ifneq ($(KBUILD_MODULES),)
772 $(Q)rm -rf $(MODVERDIR)
773 $(Q)mkdir -p $(MODVERDIR)
774endif
775
776# All the preparing..
777prepare-all: prepare0 prepare
778
779# Leave this as default for preprocessing vmlinux.lds.S, which is now
780# done in arch/$(ARCH)/kernel/Makefile
781
782export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
783
784# Single targets
785# ---------------------------------------------------------------------------
786
787%.s: %.c scripts FORCE
788 $(Q)$(MAKE) $(build)=$(@D) $@
789%.i: %.c scripts FORCE
790 $(Q)$(MAKE) $(build)=$(@D) $@
791%.o: %.c scripts FORCE
792 $(Q)$(MAKE) $(build)=$(@D) $@
793%/: scripts prepare FORCE
794 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
795%.lst: %.c scripts FORCE
796 $(Q)$(MAKE) $(build)=$(@D) $@
797%.s: %.S scripts FORCE
798 $(Q)$(MAKE) $(build)=$(@D) $@
799%.o: %.S scripts FORCE
800 $(Q)$(MAKE) $(build)=$(@D) $@
801
802# FIXME: The asm symlink changes when $(ARCH) changes. That's
803# hard to detect, but I suppose "make mrproper" is a good idea
804# before switching between archs anyway.
805
806include/asm:
807 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
808 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
809 @ln -fsn asm-$(ARCH) $@
810
811# Split autoconf.h into include/linux/config/*
812
813include/config/MARKER: include/linux/autoconf.h
814 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
815 @scripts/basic/split-include include/linux/autoconf.h include/config
816 @touch $@
817
818# Generate some files
819# ---------------------------------------------------------------------------
820
821# KERNELRELEASE can change from a few different places, meaning version.h
822# needs to be updated, so this check is forced on all builds
823
824uts_len := 64
825
826define filechk_version.h
827 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
828 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
829 exit 1; \
830 fi; \
831 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
832 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
833 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
834 )
835endef
836
837include/linux/version.h: $(srctree)/Makefile FORCE
838 $(call filechk,version.h)
839
840# ---------------------------------------------------------------------------
841
842.PHONY: depend dep
843depend dep:
844 @echo '*** Warning: make $@ is unnecessary now.'
845
846# ---------------------------------------------------------------------------
847# Modules
848
849ifdef CONFIG_MODULES
850
851# By default, build modules as well
852
853all: modules
854
855# Build modules
856
857.PHONY: modules
858modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
859 @echo ' Building modules, stage 2.';
860 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
861
862
863# Target to prepare building external modules
864.PHONY: modules_prepare
865modules_prepare: prepare-all scripts
866
867# Target to install modules
868.PHONY: modules_install
869modules_install: _modinst_ _modinst_post
870
871.PHONY: _modinst_
872_modinst_:
873 @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \
874 echo "Warning: you may need to install module-init-tools"; \
875 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
876 sleep 1; \
877 fi
878 @rm -rf $(MODLIB)/kernel
879 @rm -f $(MODLIB)/source
880 @mkdir -p $(MODLIB)/kernel
881 @ln -s $(srctree) $(MODLIB)/source
882 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
883 rm -f $(MODLIB)/build ; \
884 ln -s $(objtree) $(MODLIB)/build ; \
885 fi
886 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
887
888# If System.map exists, run depmod. This deliberately does not have a
889# dependency on System.map since that would run the dependency tree on
890# vmlinux. This depmod is only for convenience to give the initial
891# boot a modules.dep even before / is mounted read-write. However the
892# boot script depmod is the master version.
893ifeq "$(strip $(INSTALL_MOD_PATH))" ""
894depmod_opts :=
895else
896depmod_opts := -b $(INSTALL_MOD_PATH) -r
897endif
898.PHONY: _modinst_post
899_modinst_post: _modinst_
900 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
901
902else # CONFIG_MODULES
903
904# Modules not configured
905# ---------------------------------------------------------------------------
906
907modules modules_install: FORCE
908 @echo
909 @echo "The present kernel configuration has modules disabled."
910 @echo "Type 'make config' and enable loadable module support."
911 @echo "Then build a kernel with module support enabled."
912 @echo
913 @exit 1
914
915endif # CONFIG_MODULES
916
917# Generate asm-offsets.h
918# ---------------------------------------------------------------------------
919
920define filechk_gen-asm-offsets
921 (set -e; \
922 echo "#ifndef __ASM_OFFSETS_H__"; \
923 echo "#define __ASM_OFFSETS_H__"; \
924 echo "/*"; \
925 echo " * DO NOT MODIFY."; \
926 echo " *"; \
927 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
928 echo " *"; \
929 echo " */"; \
930 echo ""; \
931 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
932 echo ""; \
933 echo "#endif" )
934endef
935
936
937###
938# Cleaning is done on three levels.
939# make clean Delete most generated files
940# Leave enough to build external modules
941# make mrproper Delete the current configuration, and all generated files
942# make distclean Remove editor backup files, patch leftover files and the like
943
944# Directories & files removed with 'make clean'
945CLEAN_DIRS += $(MODVERDIR)
946CLEAN_FILES += vmlinux System.map \
947 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
948
949# Directories & files removed with 'make mrproper'
950MRPROPER_DIRS += include/config include2
951MRPROPER_FILES += .config .config.old include/asm .version \
952 include/linux/autoconf.h include/linux/version.h \
953 Module.symvers tags TAGS cscope*
954
955# clean - Delete most, but leave enough to build external modules
956#
957clean: rm-dirs := $(CLEAN_DIRS)
958clean: rm-files := $(CLEAN_FILES)
959clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs))
960
961.PHONY: $(clean-dirs) clean archclean
962$(clean-dirs):
963 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
964
965clean: archclean $(clean-dirs)
966 $(call cmd,rmdirs)
967 $(call cmd,rmfiles)
968 @find . $(RCS_FIND_IGNORE) \
969 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
970 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
971 -type f -print | xargs rm -f
972
973# mrproper - Delete all generated files, including .config
974#
975mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
976mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
977mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
978
979.PHONY: $(mrproper-dirs) mrproper archmrproper
980$(mrproper-dirs):
981 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
982
983mrproper: clean archmrproper $(mrproper-dirs)
984 $(call cmd,rmdirs)
985 $(call cmd,rmfiles)
986
987# distclean
988#
989.PHONY: distclean
990
991distclean: mrproper
992 @find $(srctree) $(RCS_FIND_IGNORE) \
993 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
994 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
995 -o -name '.*.rej' -o -size 0 \
996 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
997 -type f -print | xargs rm -f
998
999
1000# Packaging of the kernel to various formats
1001# ---------------------------------------------------------------------------
1002# rpm target kept for backward compatibility
1003package-dir := $(srctree)/scripts/package
1004
1005.PHONY: %-pkg rpm
1006
1007%pkg: FORCE
1008 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1009rpm: FORCE
1010 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1011
1012
1013# Brief documentation of the typical targets used
1014# ---------------------------------------------------------------------------
1015
1016boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1017boards := $(notdir $(boards))
1018
1019help:
1020 @echo 'Cleaning targets:'
1021 @echo ' clean - remove most generated files but keep the config'
1022 @echo ' mrproper - remove all generated files + config + various backup files'
1023 @echo ''
1024 @echo 'Configuration targets:'
1025 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1026 @echo ''
1027 @echo 'Other generic targets:'
1028 @echo ' all - Build all targets marked with [*]'
1029 @echo '* vmlinux - Build the bare kernel'
1030 @echo '* modules - Build all modules'
1031 @echo ' modules_install - Install all modules'
1032 @echo ' dir/ - Build all files in dir and below'
1033 @echo ' dir/file.[ois] - Build specified target only'
1034 @echo ' rpm - Build a kernel as an RPM package'
1035 @echo ' tags/TAGS - Generate tags file for editors'
1036 @echo ' cscope - Generate cscope index'
1037 @echo ''
1038 @echo 'Static analysers'
1039 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1040 @echo ' and init sections from non-init sections'
1041 @echo ' checkstack - Generate a list of stack hogs'
1042 @echo ' namespacecheck - Name space analysis on compiled kernel'
1043 @echo ''
1044 @echo 'Kernel packaging:'
1045 @$(MAKE) -f $(package-dir)/Makefile help
1046 @echo ''
1047 @echo 'Documentation targets:'
1048 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1049 @echo ''
1050 @echo 'Architecture specific targets ($(ARCH)):'
1051 @$(if $(archhelp),$(archhelp),\
1052 echo ' No architecture specific help defined for $(ARCH)')
1053 @echo ''
1054 @$(if $(boards), \
1055 $(foreach b, $(boards), \
1056 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1057 echo '')
1058
1059 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1060 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1061 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1062 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1063 @echo ''
1064 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1065 @echo 'For further info see the ./README file'
1066
1067
1068# Documentation targets
1069# ---------------------------------------------------------------------------
1070%docs: scripts_basic FORCE
1071 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1072
1073else # KBUILD_EXTMOD
1074
1075###
1076# External module support.
1077# When building external modules the kernel used as basis is considered
1078# read-only, and no consistency checks are made and the make
1079# system is not used on the basis kernel. If updates are required
1080# in the basis kernel ordinary make commands (without M=...) must
1081# be used.
1082#
1083# The following are the only valid targets when building external
1084# modules.
1085# make M=dir clean Delete all automatically generated files
1086# make M=dir modules Make all modules in specified dir
1087# make M=dir Same as 'make M=dir modules'
1088# make M=dir modules_install
1089# Install the modules build in the module directory
1090# Assumes install directory is already created
1091
1092# We are always building modules
1093KBUILD_MODULES := 1
1094.PHONY: crmodverdir
1095crmodverdir:
1096 $(Q)mkdir -p $(MODVERDIR)
1097
1098.PHONY: $(objtree)/Module.symvers
1099$(objtree)/Module.symvers:
1100 @test -e $(objtree)/Module.symvers || ( \
1101 echo; \
1102 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1103 echo " is missing; modules will have no dependencies and modversions."; \
1104 echo )
1105
1106module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1107.PHONY: $(module-dirs) modules
1108$(module-dirs): crmodverdir $(objtree)/Module.symvers
1109 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1110
1111modules: $(module-dirs)
1112 @echo ' Building modules, stage 2.';
1113 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1114
1115.PHONY: modules_install
1116modules_install:
1117 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1118
1119clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1120
1121.PHONY: $(clean-dirs) clean
1122$(clean-dirs):
1123 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1124
1125clean: rm-dirs := $(MODVERDIR)
1126clean: $(clean-dirs)
1127 $(call cmd,rmdirs)
1128 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1129 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1130 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1131 -type f -print | xargs rm -f
1132
1133help:
1134 @echo ' Building external modules.'
1135 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1136 @echo ''
1137 @echo ' modules - default target, build the module(s)'
1138 @echo ' modules_install - install the module'
1139 @echo ' clean - remove generated files in module directory only'
1140 @echo ''
1141endif # KBUILD_EXTMOD
1142
1143# Generate tags for editors
1144# ---------------------------------------------------------------------------
1145
1146#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1147#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1148#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1149
1150ifeq ($(KBUILD_OUTPUT),)
1151__srctree =
1152else
1153__srctree = $(srctree)/
1154endif
1155
1156define all-sources
1157 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1158 \( -name include -o -name arch \) -prune -o \
1159 -name '*.[chS]' -print; \
1160 find $(__srctree)arch/$(ARCH) $(RCS_FIND_IGNORE) \
1161 -name '*.[chS]' -print; \
1162 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1163 -name '*.[chS]' -print; \
1164 find $(__srctree)include $(RCS_FIND_IGNORE) \
1165 \( -name config -o -name 'asm-*' \) -prune \
1166 -o -name '*.[chS]' -print; \
1167 find $(__srctree)include/asm-$(ARCH) $(RCS_FIND_IGNORE) \
1168 -name '*.[chS]' -print; \
1169 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1170 -name '*.[chS]' -print )
1171endef
1172
1173quiet_cmd_cscope-file = FILELST cscope.files
1174 cmd_cscope-file = $(all-sources) > cscope.files
1175
1176quiet_cmd_cscope = MAKE cscope.out
1177 cmd_cscope = cscope -k -b -q
1178
1179cscope: FORCE
1180 $(call cmd,cscope-file)
1181 $(call cmd,cscope)
1182
1183quiet_cmd_TAGS = MAKE $@
1184cmd_TAGS = $(all-sources) | etags -
1185
1186# Exuberant ctags works better with -I
1187
1188quiet_cmd_tags = MAKE $@
1189define cmd_tags
1190 rm -f $@; \
1191 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL"`; \
1192 $(all-sources) | xargs ctags $$CTAGSF -a --extra=+f
1193endef
1194
1195TAGS: FORCE
1196 $(call cmd,TAGS)
1197
1198tags: FORCE
1199 $(call cmd,tags)
1200
1201
1202# Scripts to check various things for consistency
1203# ---------------------------------------------------------------------------
1204
1205configcheck:
1206 find * $(RCS_FIND_IGNORE) \
1207 -name '*.[hcS]' -type f -print | sort \
1208 | xargs $(PERL) -w scripts/checkconfig.pl
1209
1210includecheck:
1211 find * $(RCS_FIND_IGNORE) \
1212 -name '*.[hcS]' -type f -print | sort \
1213 | xargs $(PERL) -w scripts/checkincludes.pl
1214
1215versioncheck:
1216 find * $(RCS_FIND_IGNORE) \
1217 -name '*.[hcS]' -type f -print | sort \
1218 | xargs $(PERL) -w scripts/checkversion.pl
1219
1220buildcheck:
1221 $(PERL) $(srctree)/scripts/reference_discarded.pl
1222 $(PERL) $(srctree)/scripts/reference_init.pl
1223
1224namespacecheck:
1225 $(PERL) $(srctree)/scripts/namespace.pl
1226
1227endif #ifeq ($(config-targets),1)
1228endif #ifeq ($(mixed-targets),1)
1229
1230.PHONY: checkstack
1231checkstack:
1232 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1233 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1234
1235kernelrelease:
1236 @echo $(KERNELRELEASE)
1237
1238# FIXME Should go into a make.lib or something
1239# ===========================================================================
1240
1241quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1242 cmd_rmdirs = rm -rf $(rm-dirs)
1243
1244quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1245 cmd_rmfiles = rm -f $(rm-files)
1246
1247
1248a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1249 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1250 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1251
1252quiet_cmd_as_o_S = AS $@
1253cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1254
1255# read all saved command lines
1256
1257targets := $(wildcard $(sort $(targets)))
1258cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1259
1260ifneq ($(cmd_files),)
1261 $(cmd_files): ; # Do not try to update included dependency files
1262 include $(cmd_files)
1263endif
1264
1265# Execute command and generate cmd file
1266if_changed = $(if $(strip $? \
1267 $(filter-out $(cmd_$(1)),$(cmd_$@))\
1268 $(filter-out $(cmd_$@),$(cmd_$(1)))),\
1269 @set -e; \
1270 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
1271 $(cmd_$(1)); \
1272 echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd)
1273
1274
1275# execute the command and also postprocess generated .d dependencies
1276# file
1277if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
1278 $(filter-out $(cmd_$(1)),$(cmd_$@))\
1279 $(filter-out $(cmd_$@),$(cmd_$(1)))),\
1280 $(Q)set -e; \
1281 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \
1282 $(cmd_$(1)); \
1283 scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
1284 rm -f $(depfile); \
1285 mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)
1286
1287# Usage: $(call if_changed_rule,foo)
1288# will check if $(cmd_foo) changed, or any of the prequisites changed,
1289# and if so will execute $(rule_foo)
1290
1291if_changed_rule = $(if $(strip $? \
1292 $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\
1293 $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\
1294 $(Q)$(rule_$(1)))
1295
1296# If quiet is set, only print short version of command
1297
1298cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1))
1299
1300# filechk is used to check if the content of a generated file is updated.
1301# Sample usage:
1302# define filechk_sample
1303# echo $KERNELRELEASE
1304# endef
1305# version.h : Makefile
1306# $(call filechk,sample)
1307# The rule defined shall write to stdout the content of the new file.
1308# The existing file will be compared with the new one.
1309# - If no file exist it is created
1310# - If the content differ the new file is used
1311# - If they are equal no change, and no timestamp update
1312
1313define filechk
1314 @set -e; \
1315 echo ' CHK $@'; \
1316 mkdir -p $(dir $@); \
1317 $(filechk_$(1)) < $< > $@.tmp; \
1318 if [ -r $@ ] && cmp -s $@ $@.tmp; then \
1319 rm -f $@.tmp; \
1320 else \
1321 echo ' UPD $@'; \
1322 mv -f $@.tmp $@; \
1323 fi
1324endef
1325
1326# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir
1327# Usage:
1328# $(Q)$(MAKE) $(build)=dir
1329build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
1330
1331# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1332# Usage:
1333# $(Q)$(MAKE) $(clean)=dir
1334clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1335
1336# $(call descend,<dir>,<target>)
1337# Recursively call a sub-make in <dir> with target <target>
1338# Usage is deprecated, because make does not see this as an invocation of make.
1339descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2)
1340
1341endif # skip-makefile
1342
1343FORCE: