source: branches/2.2.9/mindi-busybox/Makefile @ 2859

Last change on this file since 2859 was 2859, checked in by bruno, 7 years ago
  • Update to upstream busybox 1.18.5
File size: 42.3 KB
Line 
1VERSION = 1
2PATCHLEVEL = 18
3SUBLEVEL = 5
4EXTRAVERSION = -rPBREV
5NAME = Unnamed
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 busybox), 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 := $(O)
94  endif
95endif
96
97# That's our default target when none is given on the command line
98PHONY := _all
99_all:
100
101ifneq ($(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
109PHONY += $(MAKECMDGOALS)
110
111$(filter-out _all,$(MAKECMDGOALS)) _all:
112    $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
113    KBUILD_SRC=$(CURDIR) \
114    KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
115
116# Leave processing to above invocation of make
117skip-makefile := 1
118endif # ifneq ($(KBUILD_OUTPUT),)
119endif # ifeq ($(KBUILD_SRC),)
120
121# We process the rest of the Makefile if this is the final invocation of make
122ifeq ($(skip-makefile),)
123
124# If building an external module we do not care about the all: rule
125# but instead _all depend on modules
126PHONY += all
127ifeq ($(KBUILD_EXTMOD),)
128_all: all
129else
130_all: modules
131endif
132
133srctree     := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
134TOPDIR      := $(srctree)
135# FIXME - TOPDIR is obsolete, use srctree/objtree
136objtree     := $(CURDIR)
137src     := $(srctree)
138obj     := $(objtree)
139
140VPATH       := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
141
142export srctree objtree VPATH TOPDIR
143
144
145# Cross compiling and selecting different set of gcc/bin-utils
146# ---------------------------------------------------------------------------
147#
148# When performing cross compilation for other architectures ARCH shall be set
149# to the target architecture. (See arch/* for the possibilities).
150# ARCH can be set during invocation of make:
151# make ARCH=ia64
152# Another way is to have ARCH set in the environment.
153# The default ARCH is the host where make is executed.
154
155# CROSS_COMPILE specify the prefix used for all executables used
156# during compilation. Only gcc and related bin-utils executables
157# are prefixed with $(CROSS_COMPILE).
158# CROSS_COMPILE can be set on the command line
159# make CROSS_COMPILE=ia64-linux-
160# Alternatively CROSS_COMPILE can be set in the environment.
161# Default value for CROSS_COMPILE is not to prefix executables
162# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
163
164CROSS_COMPILE ?=
165# bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config,
166# and it has not been included yet... thus using an awkward syntax.
167ifeq ($(CROSS_COMPILE),)
168CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null)
169CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE))
170CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE))
171#")
172endif
173
174# SUBARCH tells the usermode build what the underlying arch is.  That is set
175# first, and if a usermode build is happening, the "ARCH=um" on the command
176# line overrides the setting of ARCH below.  If a native build is happening,
177# then ARCH is assigned, getting whatever value it gets normally, and
178# SUBARCH is subsequently ignored.
179
180ifneq ($(CROSS_COMPILE),)
181SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1)
182else
183SUBARCH := $(shell uname -m)
184endif
185SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
186                     -e s/arm.*/arm/ -e s/sa110/arm/ \
187                     -e s/s390x/s390/ -e s/parisc64/parisc/ \
188                     -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
189
190ARCH ?= $(SUBARCH)
191
192# Architecture as present in compile.h
193UTS_MACHINE := $(ARCH)
194
195# SHELL used by kbuild
196CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
197      else if [ -x /bin/bash ]; then echo /bin/bash; \
198      else echo sh; fi ; fi)
199
200#   Decide whether to build built-in, modular, or both.
201#   Normally, just do built-in.
202
203KBUILD_MODULES :=
204KBUILD_BUILTIN := 1
205
206#   If we have only "make modules", don't compile built-in objects.
207#   When we're building modules with modversions, we need to consider
208#   the built-in objects during the descend as well, in order to
209#   make sure the checksums are uptodate before we record them.
210
211ifeq ($(MAKECMDGOALS),modules)
212  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
213endif
214
215#   If we have "make <whatever> modules", compile modules
216#   in addition to whatever we do anyway.
217#   Just "make" or "make all" shall build modules as well
218
219ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
220  KBUILD_MODULES := 1
221endif
222
223ifeq ($(MAKECMDGOALS),)
224  KBUILD_MODULES := 1
225endif
226
227export KBUILD_MODULES KBUILD_BUILTIN
228export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
229
230# Beautify output
231# ---------------------------------------------------------------------------
232#
233# Normally, we echo the whole command before executing it. By making
234# that echo $($(quiet)$(cmd)), we now have the possibility to set
235# $(quiet) to choose other forms of output instead, e.g.
236#
237#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
238#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
239#
240# If $(quiet) is empty, the whole command will be printed.
241# If it is set to "quiet_", only the short version will be printed.
242# If it is set to "silent_", nothing wil be printed at all, since
243# the variable $(silent_cmd_cc_o_c) doesn't exist.
244#
245# A simple variant is to prefix commands with $(Q) - that's useful
246# for commands that shall be hidden in non-verbose mode.
247#
248#   $(Q)ln $@ :<
249#
250# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
251# If KBUILD_VERBOSE equals 1 then the above command is displayed.
252
253ifeq ($(KBUILD_VERBOSE),1)
254  quiet =
255  Q =
256else
257  quiet=quiet_
258  Q = @
259endif
260
261# If the user is running make -s (silent mode), suppress echoing of
262# commands
263
264ifneq ($(findstring s,$(MAKEFLAGS)),)
265  quiet=silent_
266endif
267
268export quiet Q KBUILD_VERBOSE
269
270
271# Look for make include files relative to root of kernel src
272MAKEFLAGS += --include-dir=$(srctree)
273
274HOSTCC      = gcc
275HOSTCXX     = g++
276HOSTCFLAGS  :=
277HOSTCXXFLAGS    :=
278# We need some generic definitions
279include $(srctree)/scripts/Kbuild.include
280
281HOSTCFLAGS  += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,)
282HOSTCXXFLAGS    += -O2
283
284# For maximum performance (+ possibly random breakage, uncomment
285# the following)
286
287MAKEFLAGS += -rR
288
289# Make variables (CC, etc...)
290
291AS      = $(CROSS_COMPILE)as
292CC      = $(CROSS_COMPILE)gcc
293LD      = $(CC) -nostdlib
294CPP     = $(CC) -E
295AR      = $(CROSS_COMPILE)ar
296NM      = $(CROSS_COMPILE)nm
297STRIP       = $(CROSS_COMPILE)strip
298OBJCOPY     = $(CROSS_COMPILE)objcopy
299OBJDUMP     = $(CROSS_COMPILE)objdump
300AWK     = awk
301GENKSYMS    = scripts/genksyms/genksyms
302DEPMOD      = /sbin/depmod
303KALLSYMS    = scripts/kallsyms
304PERL        = perl
305CHECK       = sparse
306
307CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
308MODFLAGS    = -DMODULE
309CFLAGS_MODULE   = $(MODFLAGS)
310AFLAGS_MODULE   = $(MODFLAGS)
311LDFLAGS_MODULE  = -r
312CFLAGS_KERNEL   =
313AFLAGS_KERNEL   =
314
315
316# Use LINUXINCLUDE when you must reference the include/ directory.
317# Needed to be compatible with the O= option
318CFLAGS      := $(CFLAGS)
319# Added only to final link stage of busybox binary
320CFLAGS_busybox  := $(CFLAGS_busybox)
321CPPFLAGS    := $(CPPFLAGS)
322AFLAGS      := $(AFLAGS)
323LDFLAGS     := $(LDFLAGS)
324LDLIBS      :=
325
326# Read KERNELRELEASE from .kernelrelease (if it exists)
327KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
328KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
329
330export  VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
331    ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
332    CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
333    HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
334
335export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
336export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
337export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
338export FLTFLAGS
339
340# When compiling out-of-tree modules, put MODVERDIR in the module
341# tree rather than in the kernel tree. The kernel tree might
342# even be read-only.
343export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
344
345# Files to ignore in find ... statements
346
347RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
348export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
349
350# ===========================================================================
351# Rules shared between *config targets and build targets
352
353# Basic helpers built in scripts/
354PHONY += scripts_basic
355scripts_basic:
356    $(Q)$(MAKE) $(build)=scripts/basic
357
358# To avoid any implicit rule to kick in, define an empty command.
359scripts/basic/%: scripts_basic ;
360
361# This target generates Kbuild's and Config.in's from *.c files
362PHONY += gen_build_files
363gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c)
364    $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree)
365
366# bbox: we have helpers in applets/
367# we depend on scripts_basic, since scripts/basic/fixdep
368# must be built before any other host prog
369PHONY += applets_dir
370applets_dir: scripts_basic gen_build_files
371    $(Q)$(MAKE) $(build)=applets
372
373applets/%: applets_dir ;
374
375PHONY += outputmakefile
376# outputmakefile generates a Makefile in the output directory, if using a
377# separate output directory. This allows convenient use of make in the
378# output directory.
379outputmakefile:
380ifneq ($(KBUILD_SRC),)
381    $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
382        $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
383endif
384
385# To make sure we do not include .config for any of the *config targets
386# catch them early, and hand them over to scripts/kconfig/Makefile
387# It is allowed to specify more targets when calling make, including
388# mixing *config targets and build targets.
389# For example 'make oldconfig all'.
390# Detect when mixed targets is specified, and make a second invocation
391# of make so .config is not included in this case either (for *config).
392
393no-dot-config-targets := clean mrproper distclean \
394             cscope TAGS tags help %docs
395#bbox# check% is removed from above
396
397config-targets := 0
398mixed-targets  := 0
399dot-config     := 1
400
401ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
402    ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
403        dot-config := 0
404    endif
405endif
406
407ifeq ($(KBUILD_EXTMOD),)
408        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
409                config-targets := 1
410                ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
411                        mixed-targets := 1
412                endif
413        endif
414endif
415
416ifeq ($(mixed-targets),1)
417# ===========================================================================
418# We're called with mixed targets (*config and build targets).
419# Handle them one by one.
420
421%:: FORCE
422    $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
423
424else
425ifeq ($(config-targets),1)
426# ===========================================================================
427# *config targets only - make sure prerequisites are updated, and descend
428# in scripts/kconfig to make the *config target
429
430# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
431# KBUILD_DEFCONFIG may point out an alternative default configuration
432# used for 'make defconfig'
433-include $(srctree)/arch/$(ARCH)/Makefile
434export KBUILD_DEFCONFIG
435
436config: scripts_basic outputmakefile gen_build_files FORCE
437    $(Q)mkdir -p include
438    $(Q)$(MAKE) $(build)=scripts/kconfig $@
439    $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
440
441%config: scripts_basic outputmakefile gen_build_files FORCE
442    $(Q)mkdir -p include
443    $(Q)$(MAKE) $(build)=scripts/kconfig $@
444    $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
445
446else
447# ===========================================================================
448# Build targets only - this includes busybox, arch specific targets, clean
449# targets and others. In general all targets except *config targets.
450
451ifeq ($(KBUILD_EXTMOD),)
452# Additional helpers built in scripts/
453# Carefully list dependencies so we do not try to build scripts twice
454# in parallel
455PHONY += scripts
456scripts: gen_build_files scripts_basic include/config/MARKER
457    $(Q)$(MAKE) $(build)=$(@)
458
459scripts_basic: include/autoconf.h
460
461# Objects we will link into busybox / subdirs we need to visit
462core-y      := \
463        applets/ \
464
465libs-y      := \
466        archival/ \
467        archival/libarchive/ \
468        console-tools/ \
469        coreutils/ \
470        coreutils/libcoreutils/ \
471        debianutils/ \
472        e2fsprogs/ \
473        editors/ \
474        findutils/ \
475        init/ \
476        libbb/ \
477        libpwdgrp/ \
478        loginutils/ \
479        mailutils/ \
480        miscutils/ \
481        modutils/ \
482        networking/ \
483        networking/libiproute/ \
484        networking/udhcp/ \
485        printutils/ \
486        procps/ \
487        runit/ \
488        selinux/ \
489        shell/ \
490        sysklogd/ \
491        util-linux/ \
492        util-linux/volume_id/ \
493
494endif # KBUILD_EXTMOD
495
496ifeq ($(dot-config),1)
497# In this section, we need .config
498
499# Read in dependencies to all Kconfig* files, make sure to run
500# oldconfig if changes are detected.
501-include .kconfig.d
502
503-include .config
504
505# If .config needs to be updated, it will be done via the dependency
506# that autoconf has on .config.
507# To avoid any implicit rule to kick in, define an empty command
508.config .kconfig.d: ;
509
510# Now we can define CFLAGS etc according to .config
511include $(srctree)/Makefile.flags
512
513# If .config is newer than include/autoconf.h, someone tinkered
514# with it and forgot to run make oldconfig.
515# If kconfig.d is missing then we are probarly in a cleaned tree so
516# we execute the config step to be sure to catch updated Kconfig files
517include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files
518    $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
519
520include/usage.h: gen_build_files
521
522else
523# Dummy target needed, because used as prerequisite
524include/autoconf.h: ;
525endif
526
527# The all: target is the default when no target is given on the
528# command line.
529# This allow a user to issue only 'make' to build a kernel including modules
530# Defaults busybox but it is usually overridden in the arch makefile
531all: busybox doc
532
533-include $(srctree)/arch/$(ARCH)/Makefile
534
535# arch Makefile may override CC so keep this after arch Makefile is included
536#bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
537CHECKFLAGS += $(NOSTDINC_FLAGS)
538
539# Default kernel image to build when no specific target is given.
540# KBUILD_IMAGE may be overruled on the commandline or
541# set in the environment
542# Also any assignments in arch/$(ARCH)/Makefile take precedence over
543# this default value
544export KBUILD_IMAGE ?= busybox
545
546#
547# INSTALL_PATH specifies where to place the updated kernel and system map
548# images. Default is /boot, but you can set it to other values
549export  INSTALL_PATH ?= /boot
550
551#
552# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
553# relocations required by build roots.  This is not defined in the
554# makefile but the arguement can be passed to make if needed.
555#
556
557MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
558export MODLIB
559
560
561ifeq ($(KBUILD_EXTMOD),)
562busybox-dirs    := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m)))
563
564busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \
565             $(core-n) $(core-) $(libs-n) $(libs-) \
566        )))
567
568core-y      := $(patsubst %/, %/built-in.o, $(core-y))
569libs-y1     := $(patsubst %/, %/lib.a, $(libs-y))
570libs-y2     := $(patsubst %/, %/built-in.o, $(libs-y))
571libs-y      := $(libs-y1) $(libs-y2)
572
573# Build busybox
574# ---------------------------------------------------------------------------
575# busybox is build from the objects selected by $(busybox-init) and
576# $(busybox-main). Most are built-in.o files from top-level directories
577# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
578# Ordering when linking is important, and $(busybox-init) must be first.
579#
580# busybox
581#   ^
582#   |
583#   +-< $(busybox-init)
584#   |   +--< init/version.o + more
585#   |
586#   +--< $(busybox-main)
587#   |    +--< driver/built-in.o mm/built-in.o + more
588#   |
589#   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
590#
591# busybox version (uname -v) cannot be updated during normal
592# descending-into-subdirs phase since we do not yet know if we need to
593# update busybox.
594# Therefore this step is delayed until just before final link of busybox -
595# except in the kallsyms case where it is done just before adding the
596# symbols to the kernel.
597#
598# System.map is generated to document addresses of all kernel symbols
599
600busybox-all  := $(core-y) $(libs-y)
601
602# Rule to link busybox - also used during CONFIG_KALLSYMS
603# May be overridden by arch/$(ARCH)/Makefile
604quiet_cmd_busybox__ ?= LINK    $@
605      cmd_busybox__ ?= $(srctree)/scripts/trylink \
606      "$@" \
607      "$(CC)" \
608      "$(CFLAGS) $(CFLAGS_busybox)" \
609      "$(LDFLAGS) $(EXTRA_LDFLAGS)" \
610      "$(core-y)" \
611      "$(libs-y)" \
612      "$(LDLIBS)"
613
614# Generate System.map
615quiet_cmd_sysmap = SYSMAP
616      cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
617
618# Link of busybox
619# If CONFIG_KALLSYMS is set .version is already updated
620# Generate System.map and verify that the content is consistent
621# Use + in front of the busybox_version rule to silent warning with make -j2
622# First command is ':' to allow us to use + in front of the rule
623define rule_busybox__
624    :
625    $(call cmd,busybox__)
626    $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
627endef
628
629
630ifdef CONFIG_KALLSYMS
631# Generate section listing all symbols and add it into busybox $(kallsyms.o)
632# It's a three stage process:
633# o .tmp_busybox1 has all symbols and sections, but __kallsyms is
634#   empty
635#   Running kallsyms on that gives us .tmp_kallsyms1.o with
636#   the right size - busybox version (uname -v) is updated during this step
637# o .tmp_busybox2 now has a __kallsyms section of the right size,
638#   but due to the added section, some addresses have shifted.
639#   From here, we generate a correct .tmp_kallsyms2.o
640# o The correct .tmp_kallsyms2.o is linked into the final busybox.
641# o Verify that the System.map from busybox matches the map from
642#   .tmp_busybox2, just in case we did not generate kallsyms correctly.
643# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
644#   .tmp_busybox3 and .tmp_kallsyms3.o.  This is only meant as a
645#   temporary bypass to allow the kernel to be built while the
646#   maintainers work out what went wrong with kallsyms.
647
648ifdef CONFIG_KALLSYMS_EXTRA_PASS
649last_kallsyms := 3
650else
651last_kallsyms := 2
652endif
653
654kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
655
656define verify_kallsyms
657    $(Q)$(if $($(quiet)cmd_sysmap),                       \
658      echo '  $($(quiet)cmd_sysmap) .tmp_System.map' &&)  \
659      $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map
660    $(Q)cmp -s System.map .tmp_System.map ||              \
661        (echo Inconsistent kallsyms data;             \
662         echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
663         rm .tmp_kallsyms* ; /bin/false )
664endef
665
666# Update busybox version before link
667# Use + in front of this rule to silent warning about make -j1
668# First command is ':' to allow us to use + in front of this rule
669cmd_ksym_ld = $(cmd_busybox__)
670define rule_ksym_ld
671    :
672    +$(call cmd,busybox_version)
673    $(call cmd,busybox__)
674    $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
675endef
676
677# Generate .S file with all kernel symbols
678quiet_cmd_kallsyms = KSYM    $@
679      cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
680                     $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
681
682.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
683    $(call if_changed_dep,as_o_S)
684
685.tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
686    $(call cmd,kallsyms)
687
688# .tmp_busybox1 must be complete except kallsyms, so update busybox version
689.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
690    $(call if_changed_rule,ksym_ld)
691
692.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
693    $(call if_changed,busybox__)
694
695.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
696    $(call if_changed,busybox__)
697
698# Needs to visit scripts/ before $(KALLSYMS) can be used.
699$(KALLSYMS): scripts ;
700
701# Generate some data for debugging strange kallsyms problems
702debug_kallsyms: .tmp_map$(last_kallsyms)
703
704.tmp_map%: .tmp_busybox% FORCE
705    ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
706
707.tmp_map3: .tmp_map2
708
709.tmp_map2: .tmp_map1
710
711endif # ifdef CONFIG_KALLSYMS
712
713# busybox image - including updated kernel symbols
714busybox_unstripped: $(busybox-all) FORCE
715    $(call if_changed_rule,busybox__)
716    $(Q)rm -f .old_version
717
718busybox: busybox_unstripped
719ifeq ($(SKIP_STRIP),y)
720    $(Q)cp $< $@
721else
722    $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
723        busybox_unstripped -o $@
724# strip is confused by PIE executable and does not set exec bits
725    $(Q)chmod a+x $@
726endif
727
728# The actual objects are generated when descending,
729# make sure no implicit rule kicks in
730$(sort $(busybox-all)): $(busybox-dirs) ;
731
732# Handle descending into subdirectories listed in $(busybox-dirs)
733# Preset locale variables to speed up the build process. Limit locale
734# tweaks to this spot to avoid wrong language settings when running
735# make menuconfig etc.
736# Error messages still appears in the original language
737
738PHONY += $(busybox-dirs)
739$(busybox-dirs): prepare scripts
740    $(Q)$(MAKE) $(build)=$@
741
742# Build the kernel release string
743# The KERNELRELEASE is stored in a file named .kernelrelease
744# to be used when executing for example make install or make modules_install
745#
746# Take the contents of any files called localversion* and the config
747# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
748# LOCALVERSION from the command line override all of this
749
750nullstring :=
751space      := $(nullstring) # end of line
752
753___localver = $(objtree)/localversion* $(srctree)/localversion*
754__localver  = $(sort $(wildcard $(___localver)))
755# skip backup files (containing '~')
756_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
757
758localver = $(subst $(space),, \
759       $(shell cat /dev/null $(_localver)) \
760       $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
761
762# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
763# and if the SCM is know a tag from the SCM is appended.
764# The appended tag is determinded by the SCM used.
765#
766# Currently, only git is supported.
767# Other SCMs can edit scripts/setlocalversion and add the appropriate
768# checks as needed.
769ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO
770    _localver-auto = $(shell $(CONFIG_SHELL) \
771                      $(srctree)/scripts/setlocalversion $(srctree))
772    localver-auto  = $(LOCALVERSION)$(_localver-auto)
773endif
774
775localver-full = $(localver)$(localver-auto)
776
777# Store (new) KERNELRELASE string in .kernelrelease
778kernelrelease = $(KERNELVERSION)$(localver-full)
779.kernelrelease: FORCE
780    $(Q)rm -f $@
781    $(Q)echo $(kernelrelease) > $@
782
783
784# Things we need to do before we recursively start building the kernel
785# or the modules are listed in "prepare".
786# A multi level approach is used. prepareN is processed before prepareN-1.
787# archprepare is used in arch Makefiles and when processed asm symlink,
788# version.h and scripts_basic is processed / created.
789
790# Listed in dependency order
791PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
792
793# prepare-all is deprecated, use prepare as valid replacement
794PHONY += prepare-all
795
796# prepare3 is used to check if we are building in a separate output directory,
797# and if so do:
798# 1) Check that make has not been executed in the kernel src $(srctree)
799# 2) Create the include2 directory, used for the second asm symlink
800prepare3: .kernelrelease
801ifneq ($(KBUILD_SRC),)
802    @echo '  Using $(srctree) as source for busybox'
803    $(Q)if [ -f $(srctree)/.config ]; then \
804        echo $(srctree) is not clean, please run 'make mrproper'";\
805        echo "  in the '$(srctree)' directory.";\
806        /bin/false; \
807    fi;
808    $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
809    $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
810endif
811
812# prepare2 creates a makefile if using a separate output directory
813prepare2: prepare3 outputmakefile
814
815prepare1: prepare2 include/config/MARKER
816ifneq ($(KBUILD_MODULES),)
817    $(Q)mkdir -p $(MODVERDIR)
818    $(Q)rm -f $(MODVERDIR)/*
819endif
820
821archprepare: prepare1 scripts_basic applets_dir
822
823prepare0: archprepare FORCE
824    $(Q)$(MAKE) $(build)=.
825
826# All the preparing..
827prepare prepare-all: prepare0
828
829#   Leave this as default for preprocessing busybox.lds.S, which is now
830#   done in arch/$(ARCH)/kernel/Makefile
831
832export CPPFLAGS_busybox.lds += -P -C -U$(ARCH)
833
834#   FIXME: The asm symlink changes when $(ARCH) changes. That's
835#   hard to detect, but I suppose "make mrproper" is a good idea
836#   before switching between archs anyway.
837
838#bbox# include/asm:
839#bbox#  @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
840#bbox#  $(Q)if [ ! -d include ]; then mkdir -p include; fi;
841#bbox#  @ln -fsn asm-$(ARCH) $@
842
843#   Split autoconf.h into include/linux/config/*
844quiet_cmd_gen_bbconfigopts = GEN     include/bbconfigopts.h
845      cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs include/bbconfigopts.h include/bbconfigopts_bz2.h
846quiet_cmd_split_autoconf   = SPLIT   include/autoconf.h -> include/config/*
847      cmd_split_autoconf   = scripts/basic/split-include include/autoconf.h include/config
848#bbox# piggybacked generation of few .h files
849include/config/MARKER: scripts/basic/split-include include/autoconf.h
850    $(call cmd,split_autoconf)
851    $(call cmd,gen_bbconfigopts)
852    @touch $@
853
854# Generate some files
855# ---------------------------------------------------------------------------
856
857# KERNELRELEASE can change from a few different places, meaning version.h
858# needs to be updated, so this check is forced on all builds
859
860uts_len := 64
861
862define filechk_version.h
863    if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
864      echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
865      exit 1; \
866    fi; \
867    (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
868      echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
869     echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
870    )
871endef
872
873# ---------------------------------------------------------------------------
874
875PHONY += depend dep
876depend dep:
877    @echo '*** Warning: make $@ is unnecessary now.'
878
879# ---------------------------------------------------------------------------
880# Modules
881
882ifdef _BB_DISABLED_CONFIG_MODULES
883
884#   By default, build modules as well
885
886all: modules
887
888#   Build modules
889
890PHONY += modules
891modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox)
892    @echo '  Building modules, stage 2.';
893    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
894
895
896# Target to prepare building external modules
897PHONY += modules_prepare
898modules_prepare: prepare scripts
899
900# Target to install modules
901PHONY += modules_install
902modules_install: _modinst_ _modinst_post
903
904PHONY += _modinst_
905_modinst_:
906    @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
907        echo "Warning: you may need to install module-init-tools"; \
908        echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
909        sleep 1; \
910    fi
911    @rm -rf $(MODLIB)/kernel
912    @rm -f $(MODLIB)/source
913    @mkdir -p $(MODLIB)/kernel
914    @ln -s $(srctree) $(MODLIB)/source
915    @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
916        rm -f $(MODLIB)/build ; \
917        ln -s $(objtree) $(MODLIB)/build ; \
918    fi
919    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
920
921# If System.map exists, run depmod.  This deliberately does not have a
922# dependency on System.map since that would run the dependency tree on
923# busybox.  This depmod is only for convenience to give the initial
924# boot a modules.dep even before / is mounted read-write.  However the
925# boot script depmod is the master version.
926ifeq "$(strip $(INSTALL_MOD_PATH))" ""
927depmod_opts :=
928else
929depmod_opts := -b $(INSTALL_MOD_PATH) -r
930endif
931PHONY += _modinst_post
932_modinst_post: _modinst_
933    if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
934
935else # CONFIG_MODULES
936
937# Modules not configured
938# ---------------------------------------------------------------------------
939
940modules modules_install: FORCE
941    @echo
942    @echo "The present busybox configuration has modules disabled."
943    @echo "Type 'make config' and enable loadable module support."
944    @echo "Then build a kernel with module support enabled."
945    @echo
946    @exit 1
947
948endif # CONFIG_MODULES
949
950###
951# Cleaning is done on three levels.
952# make clean     Delete most generated files
953#                Leave enough to build external modules
954# make mrproper  Delete the current configuration, and all generated files
955# make distclean Remove editor backup files, patch leftover files and the like
956
957# Directories & files removed with 'make clean'
958CLEAN_DIRS  += $(MODVERDIR) _install 0_lib
959CLEAN_FILES +=  busybox busybox_unstripped* busybox.links \
960                System.map .kernelrelease \
961                .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map
962
963# Directories & files removed with 'make mrproper'
964MRPROPER_DIRS  += include/config include2
965MRPROPER_FILES += .config .config.old include/asm .version .old_version \
966          include/autoconf.h \
967          include/bbconfigopts.h \
968          include/usage_compressed.h \
969          include/applet_tables.h \
970          applets/usage \
971          .kernelrelease Module.symvers tags TAGS cscope* \
972          busybox_old
973
974# clean - Delete most, but leave enough to build external modules
975#
976clean: rm-dirs  := $(CLEAN_DIRS)
977clean: rm-files := $(CLEAN_FILES)
978clean-dirs      := $(addprefix _clean_,$(srctree) $(busybox-alldirs))
979
980PHONY += $(clean-dirs) clean archclean
981$(clean-dirs):
982    $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
983
984clean: archclean $(clean-dirs)
985    $(call cmd,rmdirs)
986    $(call cmd,rmfiles)
987    @find . $(RCS_FIND_IGNORE) \
988        \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
989        -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
990        -type f -print | xargs rm -f
991
992PHONY += doc-clean
993doc-clean: rm-files := docs/busybox.pod \
994          docs/BusyBox.html docs/busybox.1 docs/BusyBox.txt
995doc-clean:
996    $(call cmd,rmfiles)
997
998# mrproper - Delete all generated files, including .config
999#
1000mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1001mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1002mrproper-dirs      := $(addprefix _mrproper_,scripts)
1003
1004PHONY += $(mrproper-dirs) mrproper archmrproper
1005$(mrproper-dirs):
1006    $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1007
1008mrproper: clean archmrproper $(mrproper-dirs)
1009    $(call cmd,rmdirs)
1010    $(call cmd,rmfiles)
1011    @find -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f
1012    @find -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f
1013
1014# distclean
1015#
1016PHONY += distclean
1017
1018distclean: mrproper
1019    @find $(srctree) $(RCS_FIND_IGNORE) \
1020        \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1021        -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1022        -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \
1023        -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1024        -type f -print | xargs rm -f
1025
1026
1027# Packaging of the kernel to various formats
1028# ---------------------------------------------------------------------------
1029# rpm target kept for backward compatibility
1030package-dir := $(srctree)/scripts/package
1031
1032%pkg: FORCE
1033    $(Q)$(MAKE) $(build)=$(package-dir) $@
1034rpm: FORCE
1035    $(Q)$(MAKE) $(build)=$(package-dir) $@
1036
1037
1038# Brief documentation of the typical targets used
1039# ---------------------------------------------------------------------------
1040
1041boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1042boards := $(notdir $(boards))
1043
1044-include $(srctree)/Makefile.help
1045
1046# Documentation targets
1047# ---------------------------------------------------------------------------
1048%docs: scripts_basic FORCE
1049    $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1050
1051else # KBUILD_EXTMOD
1052
1053###
1054# External module support.
1055# When building external modules the kernel used as basis is considered
1056# read-only, and no consistency checks are made and the make
1057# system is not used on the basis kernel. If updates are required
1058# in the basis kernel ordinary make commands (without M=...) must
1059# be used.
1060#
1061# The following are the only valid targets when building external
1062# modules.
1063# make M=dir clean     Delete all automatically generated files
1064# make M=dir modules   Make all modules in specified dir
1065# make M=dir           Same as 'make M=dir modules'
1066# make M=dir modules_install
1067#                      Install the modules build in the module directory
1068#                      Assumes install directory is already created
1069
1070# We are always building modules
1071KBUILD_MODULES := 1
1072PHONY += crmodverdir
1073crmodverdir:
1074    $(Q)mkdir -p $(MODVERDIR)
1075    $(Q)rm -f $(MODVERDIR)/*
1076
1077PHONY += $(objtree)/Module.symvers
1078$(objtree)/Module.symvers:
1079    @test -e $(objtree)/Module.symvers || ( \
1080    echo; \
1081    echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1082    echo "           is missing; modules will have no dependencies and modversions."; \
1083    echo )
1084
1085module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1086PHONY += $(module-dirs) modules
1087$(module-dirs): crmodverdir $(objtree)/Module.symvers
1088    $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1089
1090modules: $(module-dirs)
1091    @echo '  Building modules, stage 2.';
1092    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1093
1094PHONY += modules_install
1095modules_install: _emodinst_ _emodinst_post
1096
1097install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1098PHONY += _emodinst_
1099_emodinst_:
1100    $(Q)mkdir -p $(MODLIB)/$(install-dir)
1101    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1102
1103# Run depmod only is we have System.map and depmod is executable
1104quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1105      cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1106                      $(DEPMOD) -ae -F System.map             \
1107                      $(if $(strip $(INSTALL_MOD_PATH)),      \
1108              -b $(INSTALL_MOD_PATH) -r)              \
1109              $(KERNELRELEASE);                       \
1110                   fi
1111
1112PHONY += _emodinst_post
1113_emodinst_post: _emodinst_
1114    $(call cmd,depmod)
1115
1116clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1117
1118PHONY += $(clean-dirs) clean
1119$(clean-dirs):
1120    $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1121
1122clean:  rm-dirs := $(MODVERDIR)
1123clean: $(clean-dirs)
1124    $(call cmd,rmdirs)
1125    @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1126        \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1127        -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1128        -type f -print | xargs rm -f
1129
1130help:
1131    @echo  '  Building external modules.'
1132    @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1133    @echo  ''
1134    @echo  '  modules         - default target, build the module(s)'
1135    @echo  '  modules_install - install the module'
1136    @echo  '  clean           - remove generated files in module directory only'
1137    @echo  ''
1138
1139# Dummies...
1140PHONY += prepare scripts
1141prepare: ;
1142scripts: ;
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 $(srctree) adds about 20M on i386 to the size of the output file!
1151
1152ifeq ($(src),$(obj))
1153__srctree =
1154else
1155__srctree = $(srctree)/
1156endif
1157
1158ifeq ($(ALLSOURCE_ARCHS),)
1159ifeq ($(ARCH),um)
1160ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1161else
1162ALLINCLUDE_ARCHS := $(ARCH)
1163endif
1164else
1165#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1166ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1167endif
1168
1169ALLSOURCE_ARCHS := $(ARCH)
1170
1171define all-sources
1172    ( find $(__srctree) $(RCS_FIND_IGNORE) \
1173           \( -name include -o -name arch \) -prune -o \
1174           -name '*.[chS]' -print; \
1175      for ARCH in $(ALLSOURCE_ARCHS) ; do \
1176           find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1177                -name '*.[chS]' -print; \
1178      done ; \
1179      find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1180           -name '*.[chS]' -print; \
1181      find $(__srctree)include $(RCS_FIND_IGNORE) \
1182           \( -name config -o -name 'asm-*' \) -prune \
1183           -o -name '*.[chS]' -print; \
1184      for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1185           find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1186                -name '*.[chS]' -print; \
1187      done ; \
1188      find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1189           -name '*.[chS]' -print )
1190endef
1191
1192quiet_cmd_cscope-file = FILELST cscope.files
1193      cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1194
1195quiet_cmd_cscope = MAKE    cscope.out
1196      cmd_cscope = cscope -b
1197
1198cscope: FORCE
1199    $(call cmd,cscope-file)
1200    $(call cmd,cscope)
1201
1202quiet_cmd_TAGS = MAKE   $@
1203define cmd_TAGS
1204    rm -f $@; \
1205    ETAGSF=`etags --version | grep -i exuberant >/dev/null &&     \
1206                echo "-I __initdata,__exitdata,__acquires,__releases  \
1207                      -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1208                      --extra=+f --c-kinds=+px"`;                     \
1209                $(all-sources) | xargs etags $$ETAGSF -a
1210endef
1211
1212TAGS: FORCE
1213    $(call cmd,TAGS)
1214
1215
1216quiet_cmd_tags = MAKE   $@
1217define cmd_tags
1218    rm -f $@; \
1219    CTAGSF=`ctags --version | grep -i exuberant >/dev/null &&     \
1220                echo "-I __initdata,__exitdata,__acquires,__releases  \
1221                      -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1222                      --extra=+f --c-kinds=+px"`;                     \
1223                $(all-sources) | xargs ctags $$CTAGSF -a
1224endef
1225
1226tags: FORCE
1227    $(call cmd,tags)
1228
1229
1230# Scripts to check various things for consistency
1231# ---------------------------------------------------------------------------
1232
1233includecheck:
1234    find * $(RCS_FIND_IGNORE) \
1235        -name '*.[hcS]' -type f -print | sort \
1236        | xargs $(PERL) -w scripts/checkincludes.pl
1237
1238versioncheck:
1239    find * $(RCS_FIND_IGNORE) \
1240        -name '*.[hcS]' -type f -print | sort \
1241        | xargs $(PERL) -w scripts/checkversion.pl
1242
1243namespacecheck:
1244    $(PERL) $(srctree)/scripts/namespace.pl
1245
1246endif #ifeq ($(config-targets),1)
1247endif #ifeq ($(mixed-targets),1)
1248
1249PHONY += checkstack
1250checkstack:
1251    $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \
1252    $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1253
1254kernelrelease:
1255    $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1256    $(error kernelrelease not valid - run 'make *config' to update it))
1257kernelversion:
1258    @echo $(KERNELVERSION)
1259
1260# Single targets
1261# ---------------------------------------------------------------------------
1262# Single targets are compatible with:
1263# - build whith mixed source and output
1264# - build with separate output dir 'make O=...'
1265# - external modules
1266#
1267#  target-dir => where to store outputfile
1268#  build-dir  => directory in kernel source tree to use
1269
1270ifeq ($(KBUILD_EXTMOD),)
1271        build-dir  = $(patsubst %/,%,$(dir $@))
1272        target-dir = $(dir $@)
1273else
1274        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1275        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1276        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1277endif
1278
1279%.s: %.c prepare scripts FORCE
1280    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1281%.i: %.c prepare scripts FORCE
1282    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1283%.o: %.c prepare scripts FORCE
1284    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1285%.lst: %.c prepare scripts FORCE
1286    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1287%.s: %.S prepare scripts FORCE
1288    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1289%.o: %.S prepare scripts FORCE
1290    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1291
1292# Modules
1293%/: prepare scripts FORCE
1294    $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1295    $(build)=$(build-dir)
1296/: prepare scripts FORCE
1297    $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1298    $(build)=$(build-dir)
1299
1300%.ko: prepare scripts FORCE
1301    $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1302    $(build)=$(build-dir) $(@:.ko=.o)
1303    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1304
1305# FIXME Should go into a make.lib or something
1306# ===========================================================================
1307
1308quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1309      cmd_rmdirs = rm -rf $(rm-dirs)
1310
1311quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1312      cmd_rmfiles = rm -f $(rm-files)
1313
1314
1315a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1316      $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1317      $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1318
1319quiet_cmd_as_o_S = AS      $@
1320cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1321
1322# read all saved command lines
1323
1324targets := $(wildcard $(sort $(targets)))
1325cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1326
1327ifneq ($(cmd_files),)
1328  $(cmd_files): ;   # Do not try to update included dependency files
1329  include $(cmd_files)
1330endif
1331
1332# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1333# Usage:
1334# $(Q)$(MAKE) $(clean)=dir
1335clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1336
1337endif   # skip-makefile
1338
1339PHONY += FORCE
1340FORCE:
1341
1342-include $(srctree)/Makefile.custom
1343
1344# Declare the contents of the .PHONY variable as phony.  We keep that
1345# information in a variable se we can use it in if_changed and friends.
1346.PHONY: $(PHONY)
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