source: branches/3.2/mindi-busybox/Makefile @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
File size: 42.2 KB
Line 
1VERSION = 1
2PATCHLEVEL = 21
3SUBLEVEL = 1
4EXTRAVERSION =
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
300PKG_CONFIG  ?= $(CROSS_COMPILE)pkg-config
301AWK     = awk
302GENKSYMS    = scripts/genksyms/genksyms
303DEPMOD      = /sbin/depmod
304KALLSYMS    = scripts/kallsyms
305PERL        = perl
306CHECK       = sparse
307
308CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
309MODFLAGS    = -DMODULE
310CFLAGS_MODULE   = $(MODFLAGS)
311AFLAGS_MODULE   = $(MODFLAGS)
312LDFLAGS_MODULE  = -r
313CFLAGS_KERNEL   =
314AFLAGS_KERNEL   =
315
316
317# Use LINUXINCLUDE when you must reference the include/ directory.
318# Needed to be compatible with the O= option
319CFLAGS      := $(CFLAGS)
320# Added only to final link stage of busybox binary
321CFLAGS_busybox  := $(CFLAGS_busybox)
322CPPFLAGS    := $(CPPFLAGS)
323AFLAGS      := $(AFLAGS)
324LDFLAGS     := $(LDFLAGS)
325LDLIBS      :=
326
327# Read KERNELRELEASE from .kernelrelease (if it exists)
328KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
329KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
330
331export  VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
332    ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
333    CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
334    HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
335
336export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
337export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
338export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
339export FLTFLAGS
340
341# When compiling out-of-tree modules, put MODVERDIR in the module
342# tree rather than in the kernel tree. The kernel tree might
343# even be read-only.
344export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
345
346# Files to ignore in find ... statements
347
348RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
349export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
350
351# ===========================================================================
352# Rules shared between *config targets and build targets
353
354# Basic helpers built in scripts/
355PHONY += scripts_basic
356scripts_basic:
357    $(Q)$(MAKE) $(build)=scripts/basic
358
359# To avoid any implicit rule to kick in, define an empty command.
360scripts/basic/%: scripts_basic ;
361
362# This target generates Kbuild's and Config.in's from *.c files
363PHONY += gen_build_files
364gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c)
365    $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree)
366
367# bbox: we have helpers in applets/
368# we depend on scripts_basic, since scripts/basic/fixdep
369# must be built before any other host prog
370PHONY += applets_dir
371applets_dir: scripts_basic gen_build_files
372    $(Q)$(MAKE) $(build)=applets
373
374applets/%: applets_dir ;
375
376PHONY += outputmakefile
377# outputmakefile generates a Makefile in the output directory, if using a
378# separate output directory. This allows convenient use of make in the
379# output directory.
380outputmakefile:
381ifneq ($(KBUILD_SRC),)
382    $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
383        $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
384endif
385
386# To make sure we do not include .config for any of the *config targets
387# catch them early, and hand them over to scripts/kconfig/Makefile
388# It is allowed to specify more targets when calling make, including
389# mixing *config targets and build targets.
390# For example 'make oldconfig all'.
391# Detect when mixed targets is specified, and make a second invocation
392# of make so .config is not included in this case either (for *config).
393
394no-dot-config-targets := clean mrproper distclean \
395             cscope TAGS tags help %docs
396#bbox# check% is removed from above
397
398config-targets := 0
399mixed-targets  := 0
400dot-config     := 1
401
402ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
403    ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
404        dot-config := 0
405    endif
406endif
407
408ifeq ($(KBUILD_EXTMOD),)
409        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
410                config-targets := 1
411                ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
412                        mixed-targets := 1
413                endif
414        endif
415endif
416
417ifeq ($(mixed-targets),1)
418# ===========================================================================
419# We're called with mixed targets (*config and build targets).
420# Handle them one by one.
421
422%:: FORCE
423    $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
424
425else
426ifeq ($(config-targets),1)
427# ===========================================================================
428# *config targets only - make sure prerequisites are updated, and descend
429# in scripts/kconfig to make the *config target
430
431# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
432# KBUILD_DEFCONFIG may point out an alternative default configuration
433# used for 'make defconfig'
434-include $(srctree)/arch/$(ARCH)/Makefile
435export KBUILD_DEFCONFIG
436
437config: scripts_basic outputmakefile gen_build_files FORCE
438    $(Q)mkdir -p include
439    $(Q)$(MAKE) $(build)=scripts/kconfig $@
440    $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
441
442%config: scripts_basic outputmakefile gen_build_files FORCE
443    $(Q)mkdir -p include
444    $(Q)$(MAKE) $(build)=scripts/kconfig $@
445    $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
446
447else
448# ===========================================================================
449# Build targets only - this includes busybox, arch specific targets, clean
450# targets and others. In general all targets except *config targets.
451
452ifeq ($(KBUILD_EXTMOD),)
453# Additional helpers built in scripts/
454# Carefully list dependencies so we do not try to build scripts twice
455# in parallel
456PHONY += scripts
457scripts: gen_build_files scripts_basic include/config/MARKER
458    $(Q)$(MAKE) $(build)=$(@)
459
460scripts_basic: include/autoconf.h
461
462# Objects we will link into busybox / subdirs we need to visit
463core-y      := \
464        applets/ \
465
466libs-y      := \
467        archival/ \
468        archival/libarchive/ \
469        console-tools/ \
470        coreutils/ \
471        coreutils/libcoreutils/ \
472        debianutils/ \
473        e2fsprogs/ \
474        editors/ \
475        findutils/ \
476        init/ \
477        libbb/ \
478        libpwdgrp/ \
479        loginutils/ \
480        mailutils/ \
481        miscutils/ \
482        modutils/ \
483        networking/ \
484        networking/libiproute/ \
485        networking/udhcp/ \
486        printutils/ \
487        procps/ \
488        runit/ \
489        selinux/ \
490        shell/ \
491        sysklogd/ \
492        util-linux/ \
493        util-linux/volume_id/ \
494
495endif # KBUILD_EXTMOD
496
497ifeq ($(dot-config),1)
498# In this section, we need .config
499
500# Read in dependencies to all Kconfig* files, make sure to run
501# oldconfig if changes are detected.
502-include .kconfig.d
503
504-include .config
505
506# If .config needs to be updated, it will be done via the dependency
507# that autoconf has on .config.
508# To avoid any implicit rule to kick in, define an empty command
509.config .kconfig.d: ;
510
511# Now we can define CFLAGS etc according to .config
512include $(srctree)/Makefile.flags
513
514# If .config is newer than include/autoconf.h, someone tinkered
515# with it and forgot to run make oldconfig.
516# If kconfig.d is missing then we are probarly in a cleaned tree so
517# we execute the config step to be sure to catch updated Kconfig files
518include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files
519    $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
520
521include/usage.h: gen_build_files
522
523else
524# Dummy target needed, because used as prerequisite
525include/autoconf.h: ;
526endif
527
528# The all: target is the default when no target is given on the
529# command line.
530# This allow a user to issue only 'make' to build a kernel including modules
531# Defaults busybox but it is usually overridden in the arch makefile
532all: busybox doc
533
534-include $(srctree)/arch/$(ARCH)/Makefile
535
536# arch Makefile may override CC so keep this after arch Makefile is included
537#bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
538CHECKFLAGS += $(NOSTDINC_FLAGS)
539
540# Default kernel image to build when no specific target is given.
541# KBUILD_IMAGE may be overruled on the commandline or
542# set in the environment
543# Also any assignments in arch/$(ARCH)/Makefile take precedence over
544# this default value
545export KBUILD_IMAGE ?= busybox
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),)
563busybox-dirs    := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m)))
564
565busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \
566             $(core-n) $(core-) $(libs-n) $(libs-) \
567        )))
568
569core-y      := $(patsubst %/, %/built-in.o, $(core-y))
570libs-y1     := $(patsubst %/, %/lib.a, $(libs-y))
571libs-y2     := $(patsubst %/, %/built-in.o, $(libs-y))
572libs-y      := $(libs-y1) $(libs-y2)
573
574# Build busybox
575# ---------------------------------------------------------------------------
576# busybox is build from the objects selected by $(busybox-init) and
577# $(busybox-main). Most are built-in.o files from top-level directories
578# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
579# Ordering when linking is important, and $(busybox-init) must be first.
580#
581# busybox
582#   ^
583#   |
584#   +-< $(busybox-init)
585#   |   +--< init/version.o + more
586#   |
587#   +--< $(busybox-main)
588#   |    +--< driver/built-in.o mm/built-in.o + more
589#   |
590#   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
591#
592# busybox version (uname -v) cannot be updated during normal
593# descending-into-subdirs phase since we do not yet know if we need to
594# update busybox.
595# Therefore this step is delayed until just before final link of busybox -
596# except in the kallsyms case where it is done just before adding the
597# symbols to the kernel.
598#
599# System.map is generated to document addresses of all kernel symbols
600
601busybox-all  := $(core-y) $(libs-y)
602
603# Rule to link busybox - also used during CONFIG_KALLSYMS
604# May be overridden by arch/$(ARCH)/Makefile
605quiet_cmd_busybox__ ?= LINK    $@
606      cmd_busybox__ ?= $(srctree)/scripts/trylink \
607      "$@" \
608      "$(CC)" \
609      "$(CFLAGS) $(CFLAGS_busybox)" \
610      "$(LDFLAGS) $(EXTRA_LDFLAGS)" \
611      "$(core-y)" \
612      "$(libs-y)" \
613      "$(LDLIBS)"
614
615# Generate System.map
616quiet_cmd_sysmap = SYSMAP
617      cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
618
619# Link of busybox
620# If CONFIG_KALLSYMS is set .version is already updated
621# Generate System.map and verify that the content is consistent
622# Use + in front of the busybox_version rule to silent warning with make -j2
623# First command is ':' to allow us to use + in front of the rule
624define rule_busybox__
625    :
626    $(call cmd,busybox__)
627    $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
628endef
629
630
631ifdef CONFIG_KALLSYMS
632# Generate section listing all symbols and add it into busybox $(kallsyms.o)
633# It's a three stage process:
634# o .tmp_busybox1 has all symbols and sections, but __kallsyms is
635#   empty
636#   Running kallsyms on that gives us .tmp_kallsyms1.o with
637#   the right size - busybox version (uname -v) is updated during this step
638# o .tmp_busybox2 now has a __kallsyms section of the right size,
639#   but due to the added section, some addresses have shifted.
640#   From here, we generate a correct .tmp_kallsyms2.o
641# o The correct .tmp_kallsyms2.o is linked into the final busybox.
642# o Verify that the System.map from busybox matches the map from
643#   .tmp_busybox2, just in case we did not generate kallsyms correctly.
644# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
645#   .tmp_busybox3 and .tmp_kallsyms3.o.  This is only meant as a
646#   temporary bypass to allow the kernel to be built while the
647#   maintainers work out what went wrong with kallsyms.
648
649ifdef CONFIG_KALLSYMS_EXTRA_PASS
650last_kallsyms := 3
651else
652last_kallsyms := 2
653endif
654
655kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
656
657define verify_kallsyms
658    $(Q)$(if $($(quiet)cmd_sysmap),                       \
659      echo '  $($(quiet)cmd_sysmap) .tmp_System.map' &&)  \
660      $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map
661    $(Q)cmp -s System.map .tmp_System.map ||              \
662        (echo Inconsistent kallsyms data;             \
663         echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
664         rm .tmp_kallsyms* ; /bin/false )
665endef
666
667# Update busybox version before link
668# Use + in front of this rule to silent warning about make -j1
669# First command is ':' to allow us to use + in front of this rule
670cmd_ksym_ld = $(cmd_busybox__)
671define rule_ksym_ld
672    :
673    +$(call cmd,busybox_version)
674    $(call cmd,busybox__)
675    $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
676endef
677
678# Generate .S file with all kernel symbols
679quiet_cmd_kallsyms = KSYM    $@
680      cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
681                     $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
682
683.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
684    $(call if_changed_dep,as_o_S)
685
686.tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
687    $(call cmd,kallsyms)
688
689# .tmp_busybox1 must be complete except kallsyms, so update busybox version
690.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
691    $(call if_changed_rule,ksym_ld)
692
693.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
694    $(call if_changed,busybox__)
695
696.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
697    $(call if_changed,busybox__)
698
699# Needs to visit scripts/ before $(KALLSYMS) can be used.
700$(KALLSYMS): scripts ;
701
702# Generate some data for debugging strange kallsyms problems
703debug_kallsyms: .tmp_map$(last_kallsyms)
704
705.tmp_map%: .tmp_busybox% FORCE
706    ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
707
708.tmp_map3: .tmp_map2
709
710.tmp_map2: .tmp_map1
711
712endif # ifdef CONFIG_KALLSYMS
713
714# busybox image - including updated kernel symbols
715busybox_unstripped: $(busybox-all) FORCE
716    $(call if_changed_rule,busybox__)
717    $(Q)rm -f .old_version
718
719busybox: busybox_unstripped
720ifeq ($(SKIP_STRIP),y)
721    $(Q)cp $< $@
722else
723    $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
724        busybox_unstripped -o $@
725# strip is confused by PIE executable and does not set exec bits
726    $(Q)chmod a+x $@
727endif
728
729# The actual objects are generated when descending,
730# make sure no implicit rule kicks in
731$(sort $(busybox-all)): $(busybox-dirs) ;
732
733# Handle descending into subdirectories listed in $(busybox-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
739PHONY += $(busybox-dirs)
740$(busybox-dirs): prepare scripts
741    $(Q)$(MAKE) $(build)=$@
742
743# Build the kernel release string
744# The KERNELRELEASE is stored in a file named .kernelrelease
745# to be used when executing for example make install or make modules_install
746#
747# Take the contents of any files called localversion* and the config
748# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
749# LOCALVERSION from the command line override all of this
750
751nullstring :=
752space      := $(nullstring) # end of line
753
754___localver = $(objtree)/localversion* $(srctree)/localversion*
755__localver  = $(sort $(wildcard $(___localver)))
756# skip backup files (containing '~')
757_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
758
759localver = $(subst $(space),, \
760       $(shell cat /dev/null $(_localver)) \
761       $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
762
763# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
764# and if the SCM is know a tag from the SCM is appended.
765# The appended tag is determinded by the SCM used.
766#
767# Currently, only git is supported.
768# Other SCMs can edit scripts/setlocalversion and add the appropriate
769# checks as needed.
770ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO
771    _localver-auto = $(shell $(CONFIG_SHELL) \
772                      $(srctree)/scripts/setlocalversion $(srctree))
773    localver-auto  = $(LOCALVERSION)$(_localver-auto)
774endif
775
776localver-full = $(localver)$(localver-auto)
777
778# Store (new) KERNELRELASE string in .kernelrelease
779kernelrelease = $(KERNELVERSION)$(localver-full)
780.kernelrelease: FORCE
781    $(Q)rm -f $@
782    $(Q)echo $(kernelrelease) > $@
783
784
785# Things we need to do before we recursively start building the kernel
786# or the modules are listed in "prepare".
787# A multi level approach is used. prepareN is processed before prepareN-1.
788# archprepare is used in arch Makefiles and when processed asm symlink,
789# version.h and scripts_basic is processed / created.
790
791# Listed in dependency order
792PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
793
794# prepare-all is deprecated, use prepare as valid replacement
795PHONY += prepare-all
796
797# prepare3 is used to check if we are building in a separate output directory,
798# and if so do:
799# 1) Check that make has not been executed in the kernel src $(srctree)
800# 2) Create the include2 directory, used for the second asm symlink
801prepare3: .kernelrelease
802ifneq ($(KBUILD_SRC),)
803    @echo '  Using $(srctree) as source for busybox'
804    $(Q)if [ -f $(srctree)/.config ]; then \
805        echo $(srctree) is not clean, please run 'make mrproper'";\
806        echo "  in the '$(srctree)' directory.";\
807        /bin/false; \
808    fi;
809    $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
810    $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
811endif
812
813# prepare2 creates a makefile if using a separate output directory
814prepare2: prepare3 outputmakefile
815
816prepare1: prepare2 include/config/MARKER
817ifneq ($(KBUILD_MODULES),)
818    $(Q)mkdir -p $(MODVERDIR)
819    $(Q)rm -f $(MODVERDIR)/*
820endif
821
822archprepare: prepare1 scripts_basic applets_dir
823
824prepare0: archprepare FORCE
825    $(Q)$(MAKE) $(build)=.
826
827# All the preparing..
828prepare prepare-all: prepare0
829
830#   Leave this as default for preprocessing busybox.lds.S, which is now
831#   done in arch/$(ARCH)/kernel/Makefile
832
833export CPPFLAGS_busybox.lds += -P -C -U$(ARCH)
834
835#   FIXME: The asm symlink changes when $(ARCH) changes. That's
836#   hard to detect, but I suppose "make mrproper" is a good idea
837#   before switching between archs anyway.
838
839#bbox# include/asm:
840#bbox#  @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
841#bbox#  $(Q)if [ ! -d include ]; then mkdir -p include; fi;
842#bbox#  @ln -fsn asm-$(ARCH) $@
843
844#   Split autoconf.h into include/linux/config/*
845quiet_cmd_gen_bbconfigopts = GEN     include/bbconfigopts.h
846      cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs include/bbconfigopts.h include/bbconfigopts_bz2.h
847quiet_cmd_split_autoconf   = SPLIT   include/autoconf.h -> include/config/*
848      cmd_split_autoconf   = scripts/basic/split-include include/autoconf.h include/config
849#bbox# piggybacked generation of few .h files
850include/config/MARKER: scripts/basic/split-include include/autoconf.h
851    $(call cmd,split_autoconf)
852    $(call cmd,gen_bbconfigopts)
853    @touch $@
854
855# Generate some files
856# ---------------------------------------------------------------------------
857
858# KERNELRELEASE can change from a few different places, meaning version.h
859# needs to be updated, so this check is forced on all builds
860
861uts_len := 64
862
863define filechk_version.h
864    if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
865      echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
866      exit 1; \
867    fi; \
868    (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
869      echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
870     echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
871    )
872endef
873
874# ---------------------------------------------------------------------------
875
876PHONY += depend dep
877depend dep:
878    @echo '*** Warning: make $@ is unnecessary now.'
879
880# ---------------------------------------------------------------------------
881# Modules
882
883ifdef _BB_DISABLED_CONFIG_MODULES
884
885#   By default, build modules as well
886
887all: modules
888
889#   Build modules
890
891PHONY += modules
892modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox)
893    @echo '  Building modules, stage 2.';
894    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
895
896
897# Target to prepare building external modules
898PHONY += modules_prepare
899modules_prepare: prepare scripts
900
901# Target to install modules
902PHONY += modules_install
903modules_install: _modinst_ _modinst_post
904
905PHONY += _modinst_
906_modinst_:
907    @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
908        echo "Warning: you may need to install module-init-tools"; \
909        echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
910        sleep 1; \
911    fi
912    @rm -rf $(MODLIB)/kernel
913    @rm -f $(MODLIB)/source
914    @mkdir -p $(MODLIB)/kernel
915    @ln -s $(srctree) $(MODLIB)/source
916    @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
917        rm -f $(MODLIB)/build ; \
918        ln -s $(objtree) $(MODLIB)/build ; \
919    fi
920    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
921
922# If System.map exists, run depmod.  This deliberately does not have a
923# dependency on System.map since that would run the dependency tree on
924# busybox.  This depmod is only for convenience to give the initial
925# boot a modules.dep even before / is mounted read-write.  However the
926# boot script depmod is the master version.
927ifeq "$(strip $(INSTALL_MOD_PATH))" ""
928depmod_opts :=
929else
930depmod_opts := -b $(INSTALL_MOD_PATH) -r
931endif
932PHONY += _modinst_post
933_modinst_post: _modinst_
934    if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
935
936else # CONFIG_MODULES
937
938# Modules not configured
939# ---------------------------------------------------------------------------
940
941modules modules_install: FORCE
942    @echo
943    @echo "The present busybox configuration has modules disabled."
944    @echo "Type 'make config' and enable loadable module support."
945    @echo "Then build a kernel with module support enabled."
946    @echo
947    @exit 1
948
949endif # CONFIG_MODULES
950
951###
952# Cleaning is done on three levels.
953# make clean     Delete most generated files
954#                Leave enough to build external modules
955# make mrproper  Delete the current configuration, and all generated files
956# make distclean Remove editor backup files, patch leftover files and the like
957
958# Directories & files removed with 'make clean'
959CLEAN_DIRS  += $(MODVERDIR) _install 0_lib
960CLEAN_FILES +=  busybox busybox_unstripped* busybox.links \
961                System.map .kernelrelease \
962                .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map
963
964# Directories & files removed with 'make mrproper'
965MRPROPER_DIRS  += include/config include2
966MRPROPER_FILES += .config .config.old include/asm .version .old_version \
967          include/NUM_APPLETS.h \
968          include/autoconf.h \
969          include/bbconfigopts.h \
970          include/bbconfigopts_bz2.h \
971          include/usage_compressed.h \
972          include/applet_tables.h \
973          include/applets.h \
974          include/usage.h \
975          applets/usage \
976          .kernelrelease Module.symvers tags TAGS cscope* \
977          busybox_old
978
979# clean - Delete most, but leave enough to build external modules
980#
981clean: rm-dirs  := $(CLEAN_DIRS)
982clean: rm-files := $(CLEAN_FILES)
983clean-dirs      := $(addprefix _clean_,$(srctree) $(busybox-alldirs))
984
985PHONY += $(clean-dirs) clean archclean
986$(clean-dirs):
987    $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
988
989clean: archclean $(clean-dirs)
990    $(call cmd,rmdirs)
991    $(call cmd,rmfiles)
992    @find . $(RCS_FIND_IGNORE) \
993        \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
994        -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
995        -type f -print | xargs rm -f
996
997PHONY += doc-clean
998doc-clean: rm-files := docs/busybox.pod \
999          docs/BusyBox.html docs/busybox.1 docs/BusyBox.txt
1000doc-clean:
1001    $(call cmd,rmfiles)
1002
1003# mrproper - Delete all generated files, including .config
1004#
1005mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1006mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1007mrproper-dirs      := $(addprefix _mrproper_,scripts)
1008
1009PHONY += $(mrproper-dirs) mrproper archmrproper
1010$(mrproper-dirs):
1011    $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1012
1013mrproper: clean archmrproper $(mrproper-dirs)
1014    $(call cmd,rmdirs)
1015    $(call cmd,rmfiles)
1016    @find . -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f
1017    @find . -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f
1018
1019# distclean
1020#
1021PHONY += distclean
1022
1023distclean: mrproper
1024    @find $(srctree) $(RCS_FIND_IGNORE) \
1025        \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1026        -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1027        -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \
1028        -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1029        -type f -print | xargs rm -f
1030
1031
1032# Packaging of the kernel to various formats
1033# ---------------------------------------------------------------------------
1034# rpm target kept for backward compatibility
1035package-dir := $(srctree)/scripts/package
1036
1037%pkg: FORCE
1038    $(Q)$(MAKE) $(build)=$(package-dir) $@
1039rpm: FORCE
1040    $(Q)$(MAKE) $(build)=$(package-dir) $@
1041
1042
1043# Brief documentation of the typical targets used
1044# ---------------------------------------------------------------------------
1045
1046boards := $(wildcard $(srctree)/configs/*_defconfig)
1047boards := $(notdir $(boards))
1048
1049-include $(srctree)/Makefile.help
1050
1051# Documentation targets
1052# ---------------------------------------------------------------------------
1053%docs: scripts_basic FORCE
1054    $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1055
1056else # KBUILD_EXTMOD
1057
1058###
1059# External module support.
1060# When building external modules the kernel used as basis is considered
1061# read-only, and no consistency checks are made and the make
1062# system is not used on the basis kernel. If updates are required
1063# in the basis kernel ordinary make commands (without M=...) must
1064# be used.
1065#
1066# The following are the only valid targets when building external
1067# modules.
1068# make M=dir clean     Delete all automatically generated files
1069# make M=dir modules   Make all modules in specified dir
1070# make M=dir           Same as 'make M=dir modules'
1071# make M=dir modules_install
1072#                      Install the modules build in the module directory
1073#                      Assumes install directory is already created
1074
1075# We are always building modules
1076KBUILD_MODULES := 1
1077PHONY += crmodverdir
1078crmodverdir:
1079    $(Q)mkdir -p $(MODVERDIR)
1080    $(Q)rm -f $(MODVERDIR)/*
1081
1082PHONY += $(objtree)/Module.symvers
1083$(objtree)/Module.symvers:
1084    @test -e $(objtree)/Module.symvers || ( \
1085    echo; \
1086    echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1087    echo "           is missing; modules will have no dependencies and modversions."; \
1088    echo )
1089
1090module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1091PHONY += $(module-dirs) modules
1092$(module-dirs): crmodverdir $(objtree)/Module.symvers
1093    $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1094
1095modules: $(module-dirs)
1096    @echo '  Building modules, stage 2.';
1097    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1098
1099PHONY += modules_install
1100modules_install: _emodinst_ _emodinst_post
1101
1102install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1103PHONY += _emodinst_
1104_emodinst_:
1105    $(Q)mkdir -p $(MODLIB)/$(install-dir)
1106    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1107
1108# Run depmod only is we have System.map and depmod is executable
1109quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1110      cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1111                      $(DEPMOD) -ae -F System.map             \
1112                      $(if $(strip $(INSTALL_MOD_PATH)),      \
1113              -b $(INSTALL_MOD_PATH) -r)              \
1114              $(KERNELRELEASE);                       \
1115                   fi
1116
1117PHONY += _emodinst_post
1118_emodinst_post: _emodinst_
1119    $(call cmd,depmod)
1120
1121clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1122
1123PHONY += $(clean-dirs) clean
1124$(clean-dirs):
1125    $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1126
1127clean:  rm-dirs := $(MODVERDIR)
1128clean: $(clean-dirs)
1129    $(call cmd,rmdirs)
1130    @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1131        \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1132        -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1133        -type f -print | xargs rm -f
1134
1135# Dummies...
1136PHONY += prepare scripts
1137prepare: ;
1138scripts: ;
1139endif # KBUILD_EXTMOD
1140
1141# Generate tags for editors
1142# ---------------------------------------------------------------------------
1143
1144#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1145#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1146#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1147
1148ifeq ($(src),$(obj))
1149__srctree =
1150else
1151__srctree = $(srctree)/
1152endif
1153
1154ifeq ($(ALLSOURCE_ARCHS),)
1155ifeq ($(ARCH),um)
1156ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1157else
1158ALLINCLUDE_ARCHS := $(ARCH)
1159endif
1160else
1161#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1162ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1163endif
1164
1165ALLSOURCE_ARCHS := $(ARCH)
1166
1167define all-sources
1168    ( find $(__srctree) $(RCS_FIND_IGNORE) \
1169           \( -name include -o -name arch \) -prune -o \
1170           -name '*.[chS]' -print; \
1171      for ARCH in $(ALLSOURCE_ARCHS) ; do \
1172           find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1173                -name '*.[chS]' -print; \
1174      done ; \
1175      find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1176           -name '*.[chS]' -print; \
1177      find $(__srctree)include $(RCS_FIND_IGNORE) \
1178           \( -name config -o -name 'asm-*' \) -prune \
1179           -o -name '*.[chS]' -print; \
1180      for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1181           find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1182                -name '*.[chS]' -print; \
1183      done ; \
1184      find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1185           -name '*.[chS]' -print )
1186endef
1187
1188quiet_cmd_cscope-file = FILELST cscope.files
1189      cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1190
1191quiet_cmd_cscope = MAKE    cscope.out
1192      cmd_cscope = cscope -b
1193
1194cscope: FORCE
1195    $(call cmd,cscope-file)
1196    $(call cmd,cscope)
1197
1198quiet_cmd_TAGS = MAKE   $@
1199define cmd_TAGS
1200    rm -f $@; \
1201    ETAGSF=`etags --version | grep -i exuberant >/dev/null &&     \
1202                echo "-I __initdata,__exitdata,__acquires,__releases  \
1203                      -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1204                      --extra=+f --c-kinds=+px"`;                     \
1205                $(all-sources) | xargs etags $$ETAGSF -a
1206endef
1207
1208TAGS: FORCE
1209    $(call cmd,TAGS)
1210
1211
1212quiet_cmd_tags = MAKE   $@
1213define cmd_tags
1214    rm -f $@; \
1215    CTAGSF=`ctags --version | grep -i exuberant >/dev/null &&     \
1216                echo "-I __initdata,__exitdata,__acquires,__releases  \
1217                      -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1218                      --extra=+f --c-kinds=+px"`;                     \
1219                $(all-sources) | xargs ctags $$CTAGSF -a
1220endef
1221
1222tags: FORCE
1223    $(call cmd,tags)
1224
1225
1226# Scripts to check various things for consistency
1227# ---------------------------------------------------------------------------
1228
1229includecheck:
1230    find * $(RCS_FIND_IGNORE) \
1231        -name '*.[hcS]' -type f -print | sort \
1232        | xargs $(PERL) -w scripts/checkincludes.pl
1233
1234versioncheck:
1235    find * $(RCS_FIND_IGNORE) \
1236        -name '*.[hcS]' -type f -print | sort \
1237        | xargs $(PERL) -w scripts/checkversion.pl
1238
1239namespacecheck:
1240    $(PERL) $(srctree)/scripts/namespace.pl
1241
1242endif #ifeq ($(config-targets),1)
1243endif #ifeq ($(mixed-targets),1)
1244
1245PHONY += checkstack
1246checkstack:
1247    $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \
1248    $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1249
1250kernelrelease:
1251    $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1252    $(error kernelrelease not valid - run 'make *config' to update it))
1253kernelversion:
1254    @echo $(KERNELVERSION)
1255
1256# Single targets
1257# ---------------------------------------------------------------------------
1258# Single targets are compatible with:
1259# - build whith mixed source and output
1260# - build with separate output dir 'make O=...'
1261# - external modules
1262#
1263#  target-dir => where to store outputfile
1264#  build-dir  => directory in kernel source tree to use
1265
1266ifeq ($(KBUILD_EXTMOD),)
1267        build-dir  = $(patsubst %/,%,$(dir $@))
1268        target-dir = $(dir $@)
1269else
1270        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1271        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1272        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1273endif
1274
1275%.s: %.c prepare scripts FORCE
1276    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1277%.i: %.c prepare scripts FORCE
1278    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1279%.o: %.c prepare scripts FORCE
1280    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1281%.lst: %.c prepare scripts FORCE
1282    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1283%.s: %.S prepare scripts FORCE
1284    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1285%.o: %.S prepare scripts FORCE
1286    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1287
1288# Modules
1289%/: prepare scripts FORCE
1290    $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1291    $(build)=$(build-dir)
1292/: prepare scripts FORCE
1293    $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1294    $(build)=$(build-dir)
1295
1296%.ko: prepare scripts FORCE
1297    $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1298    $(build)=$(build-dir) $(@:.ko=.o)
1299    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1300
1301# FIXME Should go into a make.lib or something
1302# ===========================================================================
1303
1304quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1305      cmd_rmdirs = rm -rf $(rm-dirs)
1306
1307quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1308      cmd_rmfiles = rm -f $(rm-files)
1309
1310
1311a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1312      $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1313      $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1314
1315quiet_cmd_as_o_S = AS      $@
1316cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1317
1318# read all saved command lines
1319
1320targets := $(wildcard $(sort $(targets)))
1321cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1322
1323ifneq ($(cmd_files),)
1324  $(cmd_files): ;   # Do not try to update included dependency files
1325  include $(cmd_files)
1326endif
1327
1328# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1329# Usage:
1330# $(Q)$(MAKE) $(clean)=dir
1331clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1332
1333endif   # skip-makefile
1334
1335PHONY += FORCE
1336FORCE:
1337
1338-include $(srctree)/Makefile.custom
1339
1340# Declare the contents of the .PHONY variable as phony.  We keep that
1341# information in a variable se we can use it in if_changed and friends.
1342.PHONY: $(PHONY)
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