source: branches/2.2.5/mindi-busybox/Makefile @ 1768

Last change on this file since 1768 was 1768, checked in by bruno, 12 years ago

Better output for mindi-busybox revision

File size: 40.5 KB
Line 
1VERSION = 1
2PATCHLEVEL = 7
3SUBLEVEL = 2
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# SUBARCH tells the usermode build what the underlying arch is.  That is set
146# first, and if a usermode build is happening, the "ARCH=um" on the command
147# line overrides the setting of ARCH below.  If a native build is happening,
148# then ARCH is assigned, getting whatever value it gets normally, and
149# SUBARCH is subsequently ignored.
150
151SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
152                  -e s/arm.*/arm/ -e s/sa110/arm/ \
153                  -e s/s390x/s390/ -e s/parisc64/parisc/ \
154                  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
155
156# Cross compiling and selecting different set of gcc/bin-utils
157# ---------------------------------------------------------------------------
158#
159# When performing cross compilation for other architectures ARCH shall be set
160# to the target architecture. (See arch/* for the possibilities).
161# ARCH can be set during invocation of make:
162# make ARCH=ia64
163# Another way is to have ARCH set in the environment.
164# The default ARCH is the host where make is executed.
165
166# CROSS_COMPILE specify the prefix used for all executables used
167# during compilation. Only gcc and related bin-utils executables
168# are prefixed with $(CROSS_COMPILE).
169# CROSS_COMPILE can be set on the command line
170# make CROSS_COMPILE=ia64-linux-
171# Alternatively CROSS_COMPILE can be set in the environment.
172# Default value for CROSS_COMPILE is not to prefix executables
173# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
174
175ARCH        ?= $(SUBARCH)
176CROSS_COMPILE   ?=
177
178# Architecture as present in compile.h
179UTS_MACHINE := $(ARCH)
180
181# SHELL used by kbuild
182CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
183      else if [ -x /bin/bash ]; then echo /bin/bash; \
184      else echo sh; fi ; fi)
185
186#   Decide whether to build built-in, modular, or both.
187#   Normally, just do built-in.
188
189KBUILD_MODULES :=
190KBUILD_BUILTIN := 1
191
192#   If we have only "make modules", don't compile built-in objects.
193#   When we're building modules with modversions, we need to consider
194#   the built-in objects during the descend as well, in order to
195#   make sure the checksums are uptodate before we record them.
196
197ifeq ($(MAKECMDGOALS),modules)
198  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
199endif
200
201#   If we have "make <whatever> modules", compile modules
202#   in addition to whatever we do anyway.
203#   Just "make" or "make all" shall build modules as well
204
205ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
206  KBUILD_MODULES := 1
207endif
208
209ifeq ($(MAKECMDGOALS),)
210  KBUILD_MODULES := 1
211endif
212
213export KBUILD_MODULES KBUILD_BUILTIN
214export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
215
216# Beautify output
217# ---------------------------------------------------------------------------
218#
219# Normally, we echo the whole command before executing it. By making
220# that echo $($(quiet)$(cmd)), we now have the possibility to set
221# $(quiet) to choose other forms of output instead, e.g.
222#
223#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
224#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
225#
226# If $(quiet) is empty, the whole command will be printed.
227# If it is set to "quiet_", only the short version will be printed.
228# If it is set to "silent_", nothing wil be printed at all, since
229# the variable $(silent_cmd_cc_o_c) doesn't exist.
230#
231# A simple variant is to prefix commands with $(Q) - that's useful
232# for commands that shall be hidden in non-verbose mode.
233#
234#   $(Q)ln $@ :<
235#
236# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
237# If KBUILD_VERBOSE equals 1 then the above command is displayed.
238
239ifeq ($(KBUILD_VERBOSE),1)
240  quiet =
241  Q =
242else
243  quiet=quiet_
244  Q = @
245endif
246
247# If the user is running make -s (silent mode), suppress echoing of
248# commands
249
250ifneq ($(findstring s,$(MAKEFLAGS)),)
251  quiet=silent_
252endif
253
254export quiet Q KBUILD_VERBOSE
255
256
257# Look for make include files relative to root of kernel src
258MAKEFLAGS += --include-dir=$(srctree)
259
260HOSTCC      = gcc
261HOSTCXX     = g++
262HOSTCFLAGS  :=
263HOSTCXXFLAGS    :=
264# We need some generic definitions
265include $(srctree)/scripts/Kbuild.include
266
267HOSTCFLAGS  += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,)
268HOSTCXXFLAGS    += -O2
269
270# For maximum performance (+ possibly random breakage, uncomment
271# the following)
272
273MAKEFLAGS += -rR
274
275# Make variables (CC, etc...)
276
277AS      = $(CROSS_COMPILE)as
278CC      = $(CROSS_COMPILE)gcc
279LD      = $(CC) -nostdlib
280CPP     = $(CC) -E
281AR      = $(CROSS_COMPILE)ar
282NM      = $(CROSS_COMPILE)nm
283STRIP       = $(CROSS_COMPILE)strip
284OBJCOPY     = $(CROSS_COMPILE)objcopy
285OBJDUMP     = $(CROSS_COMPILE)objdump
286AWK     = awk
287GENKSYMS    = scripts/genksyms/genksyms
288DEPMOD      = /sbin/depmod
289KALLSYMS    = scripts/kallsyms
290PERL        = perl
291CHECK       = sparse
292
293CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
294MODFLAGS    = -DMODULE
295CFLAGS_MODULE   = $(MODFLAGS)
296AFLAGS_MODULE   = $(MODFLAGS)
297LDFLAGS_MODULE  = -r
298CFLAGS_KERNEL   =
299AFLAGS_KERNEL   =
300
301
302# Use LINUXINCLUDE when you must reference the include/ directory.
303# Needed to be compatible with the O= option
304CFLAGS      := $(CFLAGS)
305CPPFLAGS    := $(CPPFLAGS)
306AFLAGS      := $(AFLAGS)
307LDFLAGS     := $(LDFLAGS)
308LDLIBS      :=
309
310# Read KERNELRELEASE from .kernelrelease (if it exists)
311KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
312KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
313
314export  VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
315    ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
316    CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
317    HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
318
319export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
320export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
321export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
322export FLTFLAGS
323
324# When compiling out-of-tree modules, put MODVERDIR in the module
325# tree rather than in the kernel tree. The kernel tree might
326# even be read-only.
327export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
328
329# Files to ignore in find ... statements
330
331RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
332export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
333
334# ===========================================================================
335# Rules shared between *config targets and build targets
336
337# Basic helpers built in scripts/
338PHONY += scripts_basic
339scripts_basic:
340    $(Q)$(MAKE) $(build)=scripts/basic
341
342# To avoid any implicit rule to kick in, define an empty command.
343scripts/basic/%: scripts_basic ;
344
345PHONY += outputmakefile
346# outputmakefile generates a Makefile in the output directory, if using a
347# separate output directory. This allows convenient use of make in the
348# output directory.
349outputmakefile:
350ifneq ($(KBUILD_SRC),)
351    $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
352        $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
353endif
354
355# To make sure we do not include .config for any of the *config targets
356# catch them early, and hand them over to scripts/kconfig/Makefile
357# It is allowed to specify more targets when calling make, including
358# mixing *config targets and build targets.
359# For example 'make oldconfig all'.
360# Detect when mixed targets is specified, and make a second invocation
361# of make so .config is not included in this case either (for *config).
362
363no-dot-config-targets := clean mrproper distclean \
364             cscope TAGS tags help %docs check%
365
366config-targets := 0
367mixed-targets  := 0
368dot-config     := 1
369
370ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
371    ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
372        dot-config := 0
373    endif
374endif
375
376ifeq ($(KBUILD_EXTMOD),)
377        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
378                config-targets := 1
379                ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
380                        mixed-targets := 1
381                endif
382        endif
383endif
384
385ifeq ($(mixed-targets),1)
386# ===========================================================================
387# We're called with mixed targets (*config and build targets).
388# Handle them one by one.
389
390%:: FORCE
391    $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
392
393else
394ifeq ($(config-targets),1)
395# ===========================================================================
396# *config targets only - make sure prerequisites are updated, and descend
397# in scripts/kconfig to make the *config target
398
399# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
400# KBUILD_DEFCONFIG may point out an alternative default configuration
401# used for 'make defconfig'
402-include $(srctree)/arch/$(ARCH)/Makefile
403export KBUILD_DEFCONFIG
404
405config %config: scripts_basic outputmakefile FORCE
406    $(Q)mkdir -p include
407    $(Q)$(MAKE) $(build)=scripts/kconfig $@
408    $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
409
410else
411# ===========================================================================
412# Build targets only - this includes busybox, arch specific targets, clean
413# targets and others. In general all targets except *config targets.
414
415ifeq ($(KBUILD_EXTMOD),)
416# Additional helpers built in scripts/
417# Carefully list dependencies so we do not try to build scripts twice
418# in parrallel
419PHONY += scripts
420scripts: scripts_basic include/config/MARKER
421    $(Q)$(MAKE) $(build)=$(@)
422
423scripts_basic: include/autoconf.h
424
425# Objects we will link into busybox / subdirs we need to visit
426core-y      := \
427        applets/ \
428
429libs-y      := \
430        archival/ \
431        archival/libunarchive/ \
432        console-tools/ \
433        coreutils/ \
434        coreutils/libcoreutils/ \
435        debianutils/ \
436        e2fsprogs/ \
437        editors/ \
438        findutils/ \
439        init/ \
440        ipsvd/ \
441        libbb/ \
442        libpwdgrp/ \
443        loginutils/ \
444        miscutils/ \
445        modutils/ \
446        networking/ \
447        networking/libiproute/ \
448        networking/udhcp/ \
449        procps/ \
450        runit/ \
451        selinux/ \
452        shell/ \
453        sysklogd/ \
454        util-linux/ \
455
456endif # KBUILD_EXTMOD
457
458ifeq ($(dot-config),1)
459# In this section, we need .config
460
461# Read in dependencies to all Kconfig* files, make sure to run
462# oldconfig if changes are detected.
463-include .kconfig.d
464
465-include .config
466
467# If .config needs to be updated, it will be done via the dependency
468# that autoconf has on .config.
469# To avoid any implicit rule to kick in, define an empty command
470.config .kconfig.d: ;
471
472# Now we can define CFLAGS etc according to .config
473include $(srctree)/Makefile.flags
474
475# If .config is newer than include/autoconf.h, someone tinkered
476# with it and forgot to run make oldconfig.
477# If kconfig.d is missing then we are probarly in a cleaned tree so
478# we execute the config step to be sure to catch updated Kconfig files
479include/autoconf.h: .kconfig.d .config
480    $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
481
482else
483# Dummy target needed, because used as prerequisite
484include/autoconf.h: ;
485endif
486
487# The all: target is the default when no target is given on the
488# command line.
489# This allow a user to issue only 'make' to build a kernel including modules
490# Defaults busybox but it is usually overridden in the arch makefile
491all: busybox
492
493-include $(srctree)/arch/$(ARCH)/Makefile
494
495# arch Makefile may override CC so keep this after arch Makefile is included
496#bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
497CHECKFLAGS += $(NOSTDINC_FLAGS)
498
499# warn about C99 declaration after statement
500CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
501
502# disable pointer signedness warnings in gcc 4.0
503CFLAGS += $(call cc-option,-Wno-pointer-sign,)
504
505# Default kernel image to build when no specific target is given.
506# KBUILD_IMAGE may be overruled on the commandline or
507# set in the environment
508# Also any assignments in arch/$(ARCH)/Makefile take precedence over
509# this default value
510export KBUILD_IMAGE ?= busybox
511
512#
513# INSTALL_PATH specifies where to place the updated kernel and system map
514# images. Default is /boot, but you can set it to other values
515export  INSTALL_PATH ?= /boot
516
517#
518# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
519# relocations required by build roots.  This is not defined in the
520# makefile but the arguement can be passed to make if needed.
521#
522
523MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
524export MODLIB
525
526
527ifeq ($(KBUILD_EXTMOD),)
528busybox-dirs    := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m)))
529
530busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \
531             $(core-n) $(core-) $(libs-n) $(libs-) \
532        )))
533
534core-y      := $(patsubst %/, %/built-in.o, $(core-y))
535libs-y1     := $(patsubst %/, %/lib.a, $(libs-y))
536libs-y2     := $(patsubst %/, %/built-in.o, $(libs-y))
537libs-y      := $(libs-y1) $(libs-y2)
538
539# Build busybox
540# ---------------------------------------------------------------------------
541# busybox is build from the objects selected by $(busybox-init) and
542# $(busybox-main). Most are built-in.o files from top-level directories
543# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
544# Ordering when linking is important, and $(busybox-init) must be first.
545#
546# busybox
547#   ^
548#   |
549#   +-< $(busybox-init)
550#   |   +--< init/version.o + more
551#   |
552#   +--< $(busybox-main)
553#   |    +--< driver/built-in.o mm/built-in.o + more
554#   |
555#   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
556#
557# busybox version (uname -v) cannot be updated during normal
558# descending-into-subdirs phase since we do not yet know if we need to
559# update busybox.
560# Therefore this step is delayed until just before final link of busybox -
561# except in the kallsyms case where it is done just before adding the
562# symbols to the kernel.
563#
564# System.map is generated to document addresses of all kernel symbols
565
566busybox-all  := $(core-y) $(libs-y)
567
568# Rule to link busybox - also used during CONFIG_KALLSYMS
569# May be overridden by arch/$(ARCH)/Makefile
570quiet_cmd_busybox__ ?= LINK    $@
571      cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) $(LDFLAGS) \
572      -o $@ -Wl,-Map -Wl,$@.map \
573      -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
574      -Wl,--start-group $(busybox-all) -Wl,--end-group \
575      $(LDLIBS)
576
577# Generate System.map
578quiet_cmd_sysmap = SYSMAP
579      cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
580
581# Link of busybox
582# If CONFIG_KALLSYMS is set .version is already updated
583# Generate System.map and verify that the content is consistent
584# Use + in front of the busybox_version rule to silent warning with make -j2
585# First command is ':' to allow us to use + in front of the rule
586define rule_busybox__
587    :
588    $(call cmd,busybox__)
589    $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
590endef
591
592
593ifdef CONFIG_KALLSYMS
594# Generate section listing all symbols and add it into busybox $(kallsyms.o)
595# It's a three stage process:
596# o .tmp_busybox1 has all symbols and sections, but __kallsyms is
597#   empty
598#   Running kallsyms on that gives us .tmp_kallsyms1.o with
599#   the right size - busybox version (uname -v) is updated during this step
600# o .tmp_busybox2 now has a __kallsyms section of the right size,
601#   but due to the added section, some addresses have shifted.
602#   From here, we generate a correct .tmp_kallsyms2.o
603# o The correct .tmp_kallsyms2.o is linked into the final busybox.
604# o Verify that the System.map from busybox matches the map from
605#   .tmp_busybox2, just in case we did not generate kallsyms correctly.
606# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
607#   .tmp_busybox3 and .tmp_kallsyms3.o.  This is only meant as a
608#   temporary bypass to allow the kernel to be built while the
609#   maintainers work out what went wrong with kallsyms.
610
611ifdef CONFIG_KALLSYMS_EXTRA_PASS
612last_kallsyms := 3
613else
614last_kallsyms := 2
615endif
616
617kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
618
619define verify_kallsyms
620    $(Q)$(if $($(quiet)cmd_sysmap),                       \
621      echo '  $($(quiet)cmd_sysmap) .tmp_System.map' &&)  \
622      $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map
623    $(Q)cmp -s System.map .tmp_System.map ||              \
624        (echo Inconsistent kallsyms data;             \
625         echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
626         rm .tmp_kallsyms* ; /bin/false )
627endef
628
629# Update busybox version before link
630# Use + in front of this rule to silent warning about make -j1
631# First command is ':' to allow us to use + in front of this rule
632cmd_ksym_ld = $(cmd_busybox__)
633define rule_ksym_ld
634    :
635    +$(call cmd,busybox_version)
636    $(call cmd,busybox__)
637    $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
638endef
639
640# Generate .S file with all kernel symbols
641quiet_cmd_kallsyms = KSYM    $@
642      cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
643                     $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
644
645.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
646    $(call if_changed_dep,as_o_S)
647
648.tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
649    $(call cmd,kallsyms)
650
651# .tmp_busybox1 must be complete except kallsyms, so update busybox version
652.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
653    $(call if_changed_rule,ksym_ld)
654
655.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
656    $(call if_changed,busybox__)
657
658.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
659    $(call if_changed,busybox__)
660
661# Needs to visit scripts/ before $(KALLSYMS) can be used.
662$(KALLSYMS): scripts ;
663
664# Generate some data for debugging strange kallsyms problems
665debug_kallsyms: .tmp_map$(last_kallsyms)
666
667.tmp_map%: .tmp_busybox% FORCE
668    ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
669
670.tmp_map3: .tmp_map2
671
672.tmp_map2: .tmp_map1
673
674endif # ifdef CONFIG_KALLSYMS
675
676# busybox image - including updated kernel symbols
677busybox_unstripped: $(busybox-all) FORCE
678    $(call if_changed_rule,busybox__)
679    $(Q)rm -f .old_version
680
681busybox: busybox_unstripped
682ifeq ($(SKIP_STRIP),y)
683    $(Q)cp $< $@
684else
685    $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
686        busybox_unstripped -o $@
687endif
688
689# The actual objects are generated when descending,
690# make sure no implicit rule kicks in
691$(sort $(busybox-all)): $(busybox-dirs) ;
692
693# Handle descending into subdirectories listed in $(busybox-dirs)
694# Preset locale variables to speed up the build process. Limit locale
695# tweaks to this spot to avoid wrong language settings when running
696# make menuconfig etc.
697# Error messages still appears in the original language
698
699PHONY += $(busybox-dirs)
700$(busybox-dirs): prepare scripts
701    $(Q)$(MAKE) $(build)=$@
702
703# Build the kernel release string
704# The KERNELRELEASE is stored in a file named .kernelrelease
705# to be used when executing for example make install or make modules_install
706#
707# Take the contents of any files called localversion* and the config
708# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
709# LOCALVERSION from the command line override all of this
710
711nullstring :=
712space      := $(nullstring) # end of line
713
714___localver = $(objtree)/localversion* $(srctree)/localversion*
715__localver  = $(sort $(wildcard $(___localver)))
716# skip backup files (containing '~')
717_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
718
719localver = $(subst $(space),, \
720       $(shell cat /dev/null $(_localver)) \
721       $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
722
723# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
724# and if the SCM is know a tag from the SCM is appended.
725# The appended tag is determinded by the SCM used.
726#
727# Currently, only git is supported.
728# Other SCMs can edit scripts/setlocalversion and add the appropriate
729# checks as needed.
730ifdef CONFIG_LOCALVERSION_AUTO
731    _localver-auto = $(shell $(CONFIG_SHELL) \
732                      $(srctree)/scripts/setlocalversion $(srctree))
733    localver-auto  = $(LOCALVERSION)$(_localver-auto)
734endif
735
736localver-full = $(localver)$(localver-auto)
737
738# Store (new) KERNELRELASE string in .kernelrelease
739kernelrelease = $(KERNELVERSION)$(localver-full)
740.kernelrelease: FORCE
741    $(Q)rm -f $@
742    $(Q)echo $(kernelrelease) > $@
743
744
745# Things we need to do before we recursively start building the kernel
746# or the modules are listed in "prepare".
747# A multi level approach is used. prepareN is processed before prepareN-1.
748# archprepare is used in arch Makefiles and when processed asm symlink,
749# version.h and scripts_basic is processed / created.
750
751# Listed in dependency order
752PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
753
754# prepare-all is deprecated, use prepare as valid replacement
755PHONY += prepare-all
756
757# prepare3 is used to check if we are building in a separate output directory,
758# and if so do:
759# 1) Check that make has not been executed in the kernel src $(srctree)
760# 2) Create the include2 directory, used for the second asm symlink
761prepare3: .kernelrelease
762ifneq ($(KBUILD_SRC),)
763    @echo '  Using $(srctree) as source for busybox'
764    $(Q)if [ -f $(srctree)/.config ]; then \
765        echo "  $(srctree) is not clean, please run 'make mrproper'";\
766        echo "  in the '$(srctree)' directory.";\
767        /bin/false; \
768    fi;
769    $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
770    $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
771endif
772
773# prepare2 creates a makefile if using a separate output directory
774prepare2: prepare3 outputmakefile
775
776prepare1: prepare2 include/config/MARKER
777ifneq ($(KBUILD_MODULES),)
778    $(Q)mkdir -p $(MODVERDIR)
779    $(Q)rm -f $(MODVERDIR)/*
780endif
781
782archprepare: prepare1 scripts_basic
783
784prepare0: archprepare FORCE
785    $(Q)$(MAKE) $(build)=.
786
787# All the preparing..
788prepare prepare-all: prepare0
789
790#   Leave this as default for preprocessing busybox.lds.S, which is now
791#   done in arch/$(ARCH)/kernel/Makefile
792
793export CPPFLAGS_busybox.lds += -P -C -U$(ARCH)
794
795#   FIXME: The asm symlink changes when $(ARCH) changes. That's
796#   hard to detect, but I suppose "make mrproper" is a good idea
797#   before switching between archs anyway.
798
799#bbox# include/asm:
800#bbox#  @echo '  SYMLINK $@ -> include/asm-$(ARCH)'
801#bbox#  $(Q)if [ ! -d include ]; then mkdir -p include; fi;
802#bbox#  @ln -fsn asm-$(ARCH) $@
803
804#   Split autoconf.h into include/linux/config/*
805quiet_cmd_gen_bbconfigopts = GEN     include/bbconfigopts.h
806      cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs > include/bbconfigopts.h
807quiet_cmd_split_autoconf   = SPLIT   include/autoconf.h -> include/config/*
808      cmd_split_autoconf   = scripts/basic/split-include include/autoconf.h include/config
809#bbox# piggybacked generation of few .h files
810include/config/MARKER: scripts/basic/split-include include/autoconf.h
811    $(call cmd,split_autoconf)
812    $(call cmd,gen_bbconfigopts)
813    @touch $@
814
815# Generate some files
816# ---------------------------------------------------------------------------
817
818# KERNELRELEASE can change from a few different places, meaning version.h
819# needs to be updated, so this check is forced on all builds
820
821uts_len := 64
822
823define filechk_version.h
824    if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
825      echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
826      exit 1; \
827    fi; \
828    (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
829      echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
830     echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
831    )
832endef
833
834# ---------------------------------------------------------------------------
835
836PHONY += depend dep
837depend dep:
838    @echo '*** Warning: make $@ is unnecessary now.'
839
840# ---------------------------------------------------------------------------
841# Modules
842
843ifdef CONFIG_MODULES
844
845#   By default, build modules as well
846
847all: modules
848
849#   Build modules
850
851PHONY += modules
852modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox)
853    @echo '  Building modules, stage 2.';
854    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
855
856
857# Target to prepare building external modules
858PHONY += modules_prepare
859modules_prepare: prepare scripts
860
861# Target to install modules
862PHONY += modules_install
863modules_install: _modinst_ _modinst_post
864
865PHONY += _modinst_
866_modinst_:
867    @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
868        echo "Warning: you may need to install module-init-tools"; \
869        echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
870        sleep 1; \
871    fi
872    @rm -rf $(MODLIB)/kernel
873    @rm -f $(MODLIB)/source
874    @mkdir -p $(MODLIB)/kernel
875    @ln -s $(srctree) $(MODLIB)/source
876    @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
877        rm -f $(MODLIB)/build ; \
878        ln -s $(objtree) $(MODLIB)/build ; \
879    fi
880    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
881
882# If System.map exists, run depmod.  This deliberately does not have a
883# dependency on System.map since that would run the dependency tree on
884# busybox.  This depmod is only for convenience to give the initial
885# boot a modules.dep even before / is mounted read-write.  However the
886# boot script depmod is the master version.
887ifeq "$(strip $(INSTALL_MOD_PATH))" ""
888depmod_opts :=
889else
890depmod_opts := -b $(INSTALL_MOD_PATH) -r
891endif
892PHONY += _modinst_post
893_modinst_post: _modinst_
894    if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
895
896else # CONFIG_MODULES
897
898# Modules not configured
899# ---------------------------------------------------------------------------
900
901modules modules_install: FORCE
902    @echo
903    @echo "The present busybox configuration has modules disabled."
904    @echo "Type 'make config' and enable loadable module support."
905    @echo "Then build a kernel with module support enabled."
906    @echo
907    @exit 1
908
909endif # CONFIG_MODULES
910
911###
912# Cleaning is done on three levels.
913# make clean     Delete most generated files
914#                Leave enough to build external modules
915# make mrproper  Delete the current configuration, and all generated files
916# make distclean Remove editor backup files, patch leftover files and the like
917
918# Directories & files removed with 'make clean'
919CLEAN_DIRS  += $(MODVERDIR)
920CLEAN_FILES +=  busybox* System.map .kernelrelease \
921                .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map
922
923# Directories & files removed with 'make mrproper'
924MRPROPER_DIRS  += include/config include2
925MRPROPER_FILES += .config .config.old include/asm .version .old_version \
926          include/autoconf.h \
927          include/bbconfigopts.h \
928          include/usage_compressed.h \
929          .kernelrelease Module.symvers tags TAGS cscope*
930
931# clean - Delete most, but leave enough to build external modules
932#
933clean: rm-dirs  := $(CLEAN_DIRS)
934clean: rm-files := $(CLEAN_FILES)
935clean-dirs      := $(addprefix _clean_,$(srctree) $(busybox-alldirs))
936
937PHONY += $(clean-dirs) clean archclean
938$(clean-dirs):
939    $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
940
941clean: archclean $(clean-dirs)
942    $(call cmd,rmdirs)
943    $(call cmd,rmfiles)
944    @find . $(RCS_FIND_IGNORE) \
945        \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
946        -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
947        -type f -print | xargs rm -f
948
949# mrproper - Delete all generated files, including .config
950#
951mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
952mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
953mrproper-dirs      := $(addprefix _mrproper_,scripts)
954
955PHONY += $(mrproper-dirs) mrproper archmrproper
956$(mrproper-dirs):
957    $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
958
959mrproper: clean archmrproper $(mrproper-dirs)
960    $(call cmd,rmdirs)
961    $(call cmd,rmfiles)
962
963# distclean
964#
965PHONY += distclean
966
967distclean: mrproper
968    @find $(srctree) $(RCS_FIND_IGNORE) \
969        \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
970        -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
971        -o -name '.*.rej' -o -size 0 \
972        -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
973        -type f -print | xargs rm -f
974
975
976# Packaging of the kernel to various formats
977# ---------------------------------------------------------------------------
978# rpm target kept for backward compatibility
979package-dir := $(srctree)/scripts/package
980
981%pkg: FORCE
982    $(Q)$(MAKE) $(build)=$(package-dir) $@
983rpm: FORCE
984    $(Q)$(MAKE) $(build)=$(package-dir) $@
985
986
987# Brief documentation of the typical targets used
988# ---------------------------------------------------------------------------
989
990boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
991boards := $(notdir $(boards))
992
993-include $(srctree)/Makefile.help
994
995# Documentation targets
996# ---------------------------------------------------------------------------
997%docs: scripts_basic FORCE
998    $(Q)$(MAKE) $(build)=Documentation/DocBook $@
999
1000else # KBUILD_EXTMOD
1001
1002###
1003# External module support.
1004# When building external modules the kernel used as basis is considered
1005# read-only, and no consistency checks are made and the make
1006# system is not used on the basis kernel. If updates are required
1007# in the basis kernel ordinary make commands (without M=...) must
1008# be used.
1009#
1010# The following are the only valid targets when building external
1011# modules.
1012# make M=dir clean     Delete all automatically generated files
1013# make M=dir modules   Make all modules in specified dir
1014# make M=dir           Same as 'make M=dir modules'
1015# make M=dir modules_install
1016#                      Install the modules build in the module directory
1017#                      Assumes install directory is already created
1018
1019# We are always building modules
1020KBUILD_MODULES := 1
1021PHONY += crmodverdir
1022crmodverdir:
1023    $(Q)mkdir -p $(MODVERDIR)
1024    $(Q)rm -f $(MODVERDIR)/*
1025
1026PHONY += $(objtree)/Module.symvers
1027$(objtree)/Module.symvers:
1028    @test -e $(objtree)/Module.symvers || ( \
1029    echo; \
1030    echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1031    echo "           is missing; modules will have no dependencies and modversions."; \
1032    echo )
1033
1034module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1035PHONY += $(module-dirs) modules
1036$(module-dirs): crmodverdir $(objtree)/Module.symvers
1037    $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1038
1039modules: $(module-dirs)
1040    @echo '  Building modules, stage 2.';
1041    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1042
1043PHONY += modules_install
1044modules_install: _emodinst_ _emodinst_post
1045
1046install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1047PHONY += _emodinst_
1048_emodinst_:
1049    $(Q)mkdir -p $(MODLIB)/$(install-dir)
1050    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1051
1052# Run depmod only is we have System.map and depmod is executable
1053quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1054      cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1055                      $(DEPMOD) -ae -F System.map             \
1056                      $(if $(strip $(INSTALL_MOD_PATH)),      \
1057              -b $(INSTALL_MOD_PATH) -r)              \
1058              $(KERNELRELEASE);                       \
1059                   fi
1060
1061PHONY += _emodinst_post
1062_emodinst_post: _emodinst_
1063    $(call cmd,depmod)
1064
1065clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1066
1067PHONY += $(clean-dirs) clean
1068$(clean-dirs):
1069    $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1070
1071clean:  rm-dirs := $(MODVERDIR)
1072clean: $(clean-dirs)
1073    $(call cmd,rmdirs)
1074    @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1075        \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1076        -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1077        -type f -print | xargs rm -f
1078
1079help:
1080    @echo  '  Building external modules.'
1081    @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1082    @echo  ''
1083    @echo  '  modules         - default target, build the module(s)'
1084    @echo  '  modules_install - install the module'
1085    @echo  '  clean           - remove generated files in module directory only'
1086    @echo  ''
1087
1088# Dummies...
1089PHONY += prepare scripts
1090prepare: ;
1091scripts: ;
1092endif # KBUILD_EXTMOD
1093
1094# Generate tags for editors
1095# ---------------------------------------------------------------------------
1096
1097#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1098#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1099#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1100
1101ifeq ($(src),$(obj))
1102__srctree =
1103else
1104__srctree = $(srctree)/
1105endif
1106
1107ifeq ($(ALLSOURCE_ARCHS),)
1108ifeq ($(ARCH),um)
1109ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1110else
1111ALLINCLUDE_ARCHS := $(ARCH)
1112endif
1113else
1114#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1115ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1116endif
1117
1118ALLSOURCE_ARCHS := $(ARCH)
1119
1120define all-sources
1121    ( find $(__srctree) $(RCS_FIND_IGNORE) \
1122           \( -name include -o -name arch \) -prune -o \
1123           -name '*.[chS]' -print; \
1124      for ARCH in $(ALLSOURCE_ARCHS) ; do \
1125           find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1126                -name '*.[chS]' -print; \
1127      done ; \
1128      find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1129           -name '*.[chS]' -print; \
1130      find $(__srctree)include $(RCS_FIND_IGNORE) \
1131           \( -name config -o -name 'asm-*' \) -prune \
1132           -o -name '*.[chS]' -print; \
1133      for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1134           find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1135                -name '*.[chS]' -print; \
1136      done ; \
1137      find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1138           -name '*.[chS]' -print )
1139endef
1140
1141quiet_cmd_cscope-file = FILELST cscope.files
1142      cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1143
1144quiet_cmd_cscope = MAKE    cscope.out
1145      cmd_cscope = cscope -b
1146
1147cscope: FORCE
1148    $(call cmd,cscope-file)
1149    $(call cmd,cscope)
1150
1151quiet_cmd_TAGS = MAKE   $@
1152define cmd_TAGS
1153    rm -f $@; \
1154    ETAGSF=`etags --version | grep -i exuberant >/dev/null &&     \
1155                echo "-I __initdata,__exitdata,__acquires,__releases  \
1156                      -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1157                      --extra=+f --c-kinds=+px"`;                     \
1158                $(all-sources) | xargs etags $$ETAGSF -a
1159endef
1160
1161TAGS: FORCE
1162    $(call cmd,TAGS)
1163
1164
1165quiet_cmd_tags = MAKE   $@
1166define cmd_tags
1167    rm -f $@; \
1168    CTAGSF=`ctags --version | grep -i exuberant >/dev/null &&     \
1169                echo "-I __initdata,__exitdata,__acquires,__releases  \
1170                      -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL              \
1171                      --extra=+f --c-kinds=+px"`;                     \
1172                $(all-sources) | xargs ctags $$CTAGSF -a
1173endef
1174
1175tags: FORCE
1176    $(call cmd,tags)
1177
1178
1179# Scripts to check various things for consistency
1180# ---------------------------------------------------------------------------
1181
1182includecheck:
1183    find * $(RCS_FIND_IGNORE) \
1184        -name '*.[hcS]' -type f -print | sort \
1185        | xargs $(PERL) -w scripts/checkincludes.pl
1186
1187versioncheck:
1188    find * $(RCS_FIND_IGNORE) \
1189        -name '*.[hcS]' -type f -print | sort \
1190        | xargs $(PERL) -w scripts/checkversion.pl
1191
1192namespacecheck:
1193    $(PERL) $(srctree)/scripts/namespace.pl
1194
1195endif #ifeq ($(config-targets),1)
1196endif #ifeq ($(mixed-targets),1)
1197
1198PHONY += checkstack
1199checkstack:
1200    $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \
1201    $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1202
1203kernelrelease:
1204    $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1205    $(error kernelrelease not valid - run 'make *config' to update it))
1206kernelversion:
1207    @echo $(KERNELVERSION)
1208
1209# Single targets
1210# ---------------------------------------------------------------------------
1211# Single targets are compatible with:
1212# - build whith mixed source and output
1213# - build with separate output dir 'make O=...'
1214# - external modules
1215#
1216#  target-dir => where to store outputfile
1217#  build-dir  => directory in kernel source tree to use
1218
1219ifeq ($(KBUILD_EXTMOD),)
1220        build-dir  = $(patsubst %/,%,$(dir $@))
1221        target-dir = $(dir $@)
1222else
1223        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1224        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1225        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1226endif
1227
1228%.s: %.c prepare scripts FORCE
1229    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1230%.i: %.c prepare scripts FORCE
1231    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1232%.o: %.c prepare scripts FORCE
1233    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1234%.lst: %.c prepare scripts FORCE
1235    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1236%.s: %.S prepare scripts FORCE
1237    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1238%.o: %.S prepare scripts FORCE
1239    $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1240
1241# Modules
1242/ %/: prepare scripts FORCE
1243    $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1244    $(build)=$(build-dir)
1245%.ko: prepare scripts FORCE
1246    $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1247    $(build)=$(build-dir) $(@:.ko=.o)
1248    $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1249
1250# FIXME Should go into a make.lib or something
1251# ===========================================================================
1252
1253quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1254      cmd_rmdirs = rm -rf $(rm-dirs)
1255
1256quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1257      cmd_rmfiles = rm -f $(rm-files)
1258
1259
1260a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1261      $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1262      $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1263
1264quiet_cmd_as_o_S = AS      $@
1265cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1266
1267# read all saved command lines
1268
1269targets := $(wildcard $(sort $(targets)))
1270cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1271
1272ifneq ($(cmd_files),)
1273  $(cmd_files): ;   # Do not try to update included dependency files
1274  include $(cmd_files)
1275endif
1276
1277# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1278# Usage:
1279# $(Q)$(MAKE) $(clean)=dir
1280clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1281
1282endif   # skip-makefile
1283
1284PHONY += FORCE
1285FORCE:
1286
1287-include $(srctree)/Makefile.custom
1288
1289# Declare the contents of the .PHONY variable as phony.  We keep that
1290# information in a variable se we can use it in if_changed and friends.
1291.PHONY: $(PHONY)
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