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Denis Vlasenko7d219aa2006-10-05 10:17:08 +00001VERSION = 1
Denis Vlasenkoa883fa42006-12-13 23:52:32 +00002PATCHLEVEL = 3
3SUBLEVEL = 0
4EXTRAVERSION =
Denis Vlasenkoda8f43f2006-10-09 19:47:38 +00005NAME = Unnamed
Denis Vlasenko7d219aa2006-10-05 10:17:08 +00006
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.
Eric Andersenc4996011999-10-20 22:08:37 +000018#
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000019# 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.
Erik Andersen9ffdaa62000-02-11 21:55:04 +000026#
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000027# 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.
Eric Andersenc4996011999-10-20 22:08:37 +000031
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000032# To put more focus on warnings, be less verbose as default
33# Use 'make V=1' to see the full commands
Rob Landleyd9872aa2006-05-27 21:24:16 +000034
Bernhard Reutner-Fischer7b8ff222006-06-13 14:20:17 +000035ifdef V
36 ifeq ("$(origin V)", "command line")
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000037 KBUILD_VERBOSE = $(V)
Bernhard Reutner-Fischer7b8ff222006-06-13 14:20:17 +000038 endif
39endif
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000040ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42endif
43
44# Call sparse as part of compilation of C files
45# Use 'make C=1' to enable sparse checking
46
47ifdef C
48 ifeq ("$(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 := $(M)
Bernhard Reutner-Fischer7b8ff222006-06-13 14:20:17 +000065 endif
66endif
67
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000068
69# kbuild supports saving output files in a separate directory.
70# To locate output files in a separate directory two syntaxes are supported.
71# In both cases the working directory must be the root of the kernel src.
72# 1) O=
73# Use "make O=dir/to/store/output/files/"
74#
75# 2) Set KBUILD_OUTPUT
76# Set the environment variable KBUILD_OUTPUT to point to the directory
77# where the output files shall be placed.
78# export KBUILD_OUTPUT=dir/to/store/output/files/
79# make
80#
81# The O= assignment takes precedence over the KBUILD_OUTPUT environment
82# variable.
83
84
85# KBUILD_SRC is set on invocation of make in OBJ directory
86# KBUILD_SRC is not intended to be used by the regular user (for now)
87ifeq ($(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 := $(O)
94 endif
Eric Andersen7daa0762004-10-08 07:46:08 +000095endif
96
Denis Vlasenko7d219aa2006-10-05 10:17:08 +000097# That's our default target when none is given on the command line
98PHONY := _all
99_all:
Bernhard Reutner-Fischer5d261262006-03-01 22:54:48 +0000100
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000101ifneq ($(KBUILD_OUTPUT),)
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000102# Invoke a second make in the output directory, passing relevant variables
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000103# check that the output directory actually exists
104saved-output := $(KBUILD_OUTPUT)
105KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
106$(if $(KBUILD_OUTPUT),, \
Eric Andersen7daa0762004-10-08 07:46:08 +0000107 $(error output directory "$(saved-output)" does not exist))
108
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000109PHONY += $(MAKECMDGOALS)
Eric Andersen7daa0762004-10-08 07:46:08 +0000110
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000111$(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 $@
Eric Andersen7daa0762004-10-08 07:46:08 +0000115
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000116# Leave processing to above invocation of make
117skip-makefile := 1
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000118endif # ifneq ($(KBUILD_OUTPUT),)
119endif # ifeq ($(KBUILD_SRC),)
Eric Andersen7daa0762004-10-08 07:46:08 +0000120
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000121# We process the rest of the Makefile if this is the final invocation of make
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000122ifeq ($(skip-makefile),)
Eric Andersen7daa0762004-10-08 07:46:08 +0000123
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000124# 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),)
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000128_all: all
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000129else
130_all: modules
131endif
Glenn L McGrath6376b582003-09-24 15:48:29 +0000132
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000133srctree := $(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
Bernhard Reutner-Fischer4d635252005-10-07 10:53:15 +0000143
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000144
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000145# 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.
Bernhard Reutner-Fischer07a79e72006-03-09 09:03:37 +0000150
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000151SUBARCH := $(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/ )
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000155
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000156# Cross compiling and selecting different set of gcc/bin-utils
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000157# ---------------------------------------------------------------------------
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000158#
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.
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000165
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000166# 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
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000174
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000175ARCH ?= $(SUBARCH)
176CROSS_COMPILE ?=
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000177
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000178# Architecture as present in compile.h
179UTS_MACHINE := $(ARCH)
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000180
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000181# 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)
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000185
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000186HOSTCC = gcc
187HOSTCXX = g++
188HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
189HOSTCXXFLAGS = -O2
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000190
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000191# Decide whether to build built-in, modular, or both.
192# Normally, just do built-in.
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000193
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000194KBUILD_MODULES :=
195KBUILD_BUILTIN := 1
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000196
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000197# If we have only "make modules", don't compile built-in objects.
198# When we're building modules with modversions, we need to consider
199# the built-in objects during the descend as well, in order to
200# make sure the checksums are uptodate before we record them.
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000201
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000202ifeq ($(MAKECMDGOALS),modules)
203 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
204endif
Rob Landleya167ec52006-01-31 02:42:50 +0000205
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000206# If we have "make <whatever> modules", compile modules
207# in addition to whatever we do anyway.
208# Just "make" or "make all" shall build modules as well
209
210ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
211 KBUILD_MODULES := 1
212endif
213
214ifeq ($(MAKECMDGOALS),)
215 KBUILD_MODULES := 1
216endif
217
218export KBUILD_MODULES KBUILD_BUILTIN
219export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
220
221# Beautify output
222# ---------------------------------------------------------------------------
223#
224# Normally, we echo the whole command before executing it. By making
225# that echo $($(quiet)$(cmd)), we now have the possibility to set
226# $(quiet) to choose other forms of output instead, e.g.
227#
228# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
229# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
230#
231# If $(quiet) is empty, the whole command will be printed.
232# If it is set to "quiet_", only the short version will be printed.
233# If it is set to "silent_", nothing wil be printed at all, since
234# the variable $(silent_cmd_cc_o_c) doesn't exist.
235#
236# A simple variant is to prefix commands with $(Q) - that's useful
237# for commands that shall be hidden in non-verbose mode.
238#
239# $(Q)ln $@ :<
240#
241# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
242# If KBUILD_VERBOSE equals 1 then the above command is displayed.
243
244ifeq ($(KBUILD_VERBOSE),1)
245 quiet =
246 Q =
247else
248 quiet=quiet_
249 Q = @
250endif
251
252# If the user is running make -s (silent mode), suppress echoing of
253# commands
254
255ifneq ($(findstring s,$(MAKEFLAGS)),)
256 quiet=silent_
257endif
258
259export quiet Q KBUILD_VERBOSE
Rob Landleya167ec52006-01-31 02:42:50 +0000260
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000261
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000262# Look for make include files relative to root of kernel src
263MAKEFLAGS += --include-dir=$(srctree)
Bernhard Reutner-Fischera9d89132005-10-07 18:45:03 +0000264
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000265# We need some generic definitions
Denis Vlasenko14aa9f72006-10-31 23:03:09 +0000266include $(srctree)/scripts/Kbuild.include
Bernhard Reutner-Fischere28d1d62006-05-26 13:22:57 +0000267
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000268# For maximum performance (+ possibly random breakage, uncomment
269# the following)
Eric Andersen00814662001-04-26 23:29:10 +0000270
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000271MAKEFLAGS += -rR
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000272
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000273# Make variables (CC, etc...)
274
275AS = $(CROSS_COMPILE)as
276LD = $(CROSS_COMPILE)ld
277CC = $(CROSS_COMPILE)gcc
278CPP = $(CC) -E
279AR = $(CROSS_COMPILE)ar
280NM = $(CROSS_COMPILE)nm
281STRIP = $(CROSS_COMPILE)strip
282OBJCOPY = $(CROSS_COMPILE)objcopy
283OBJDUMP = $(CROSS_COMPILE)objdump
284AWK = awk
285GENKSYMS = scripts/genksyms/genksyms
286DEPMOD = /sbin/depmod
287KALLSYMS = scripts/kallsyms
288PERL = perl
289CHECK = sparse
290
291CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
292MODFLAGS = -DMODULE
293CFLAGS_MODULE = $(MODFLAGS)
294AFLAGS_MODULE = $(MODFLAGS)
295LDFLAGS_MODULE = -r
296CFLAGS_KERNEL =
297AFLAGS_KERNEL =
298
299
300# Use LINUXINCLUDE when you must reference the include/ directory.
301# Needed to be compatible with the O= option
302CFLAGS :=
303CPPFLAGS :=
304AFLAGS :=
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000305
306# Read KERNELRELEASE from .kernelrelease (if it exists)
307KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
308KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
309
310export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
311 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
312 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
313 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
314
315export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
316export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
317export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
318
319# When compiling out-of-tree modules, put MODVERDIR in the module
320# tree rather than in the kernel tree. The kernel tree might
321# even be read-only.
322export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
323
324# Files to ignore in find ... statements
325
326RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
327export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
328
329# ===========================================================================
330# Rules shared between *config targets and build targets
331
332# Basic helpers built in scripts/
333PHONY += scripts_basic
334scripts_basic:
335 $(Q)$(MAKE) $(build)=scripts/basic
336
337# To avoid any implicit rule to kick in, define an empty command.
338scripts/basic/%: scripts_basic ;
339
340PHONY += outputmakefile
341# outputmakefile generates a Makefile in the output directory, if using a
342# separate output directory. This allows convenient use of make in the
343# output directory.
344outputmakefile:
345ifneq ($(KBUILD_SRC),)
346 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
347 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
348endif
349
350# To make sure we do not include .config for any of the *config targets
351# catch them early, and hand them over to scripts/kconfig/Makefile
352# It is allowed to specify more targets when calling make, including
353# mixing *config targets and build targets.
354# For example 'make oldconfig all'.
355# Detect when mixed targets is specified, and make a second invocation
356# of make so .config is not included in this case either (for *config).
357
358no-dot-config-targets := clean mrproper distclean \
359 cscope TAGS tags help %docs check%
360
361config-targets := 0
362mixed-targets := 0
363dot-config := 1
364
365ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
366 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
367 dot-config := 0
368 endif
369endif
370
371ifeq ($(KBUILD_EXTMOD),)
372 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
373 config-targets := 1
374 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
375 mixed-targets := 1
376 endif
377 endif
378endif
379
380ifeq ($(mixed-targets),1)
381# ===========================================================================
382# We're called with mixed targets (*config and build targets).
383# Handle them one by one.
384
385%:: FORCE
386 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
387
388else
389ifeq ($(config-targets),1)
390# ===========================================================================
391# *config targets only - make sure prerequisites are updated, and descend
392# in scripts/kconfig to make the *config target
393
394# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
395# KBUILD_DEFCONFIG may point out an alternative default configuration
396# used for 'make defconfig'
397-include $(srctree)/arch/$(ARCH)/Makefile
398export KBUILD_DEFCONFIG
399
400config %config: scripts_basic outputmakefile FORCE
Denis Vlasenko665b02c2006-10-11 21:24:42 +0000401 $(Q)mkdir -p include
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000402 $(Q)$(MAKE) $(build)=scripts/kconfig $@
403 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
404
405else
406# ===========================================================================
407# Build targets only - this includes busybox, arch specific targets, clean
408# targets and others. In general all targets except *config targets.
409
410ifeq ($(KBUILD_EXTMOD),)
411# Additional helpers built in scripts/
412# Carefully list dependencies so we do not try to build scripts twice
413# in parrallel
414PHONY += scripts
415scripts: scripts_basic include/config/MARKER
416 $(Q)$(MAKE) $(build)=$(@)
417
418scripts_basic: include/autoconf.h
419
420# Objects we will link into busybox / subdirs we need to visit
421core-y := \
422 applets/ \
423
424libs-y := \
425 archival/ \
426 archival/libunarchive/ \
427 console-tools/ \
428 coreutils/ \
429 coreutils/libcoreutils/ \
430 debianutils/ \
431 e2fsprogs/ \
432 e2fsprogs/blkid/ \
433 e2fsprogs/e2p/ \
434 e2fsprogs/ext2fs/ \
435 e2fsprogs/uuid/ \
436 editors/ \
437 findutils/ \
438 init/ \
439 libbb/ \
440 libpwdgrp/ \
441 loginutils/ \
442 miscutils/ \
443 modutils/ \
444 networking/ \
445 networking/libiproute/ \
446 networking/udhcp/ \
447 procps/ \
448 runit/ \
449 shell/ \
450 sysklogd/ \
451 util-linux/ \
452
453endif # KBUILD_EXTMOD
454
455ifeq ($(dot-config),1)
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000456# In this section, we need .config
Eric Andersen7daa0762004-10-08 07:46:08 +0000457
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000458# Read in dependencies to all Kconfig* files, make sure to run
459# oldconfig if changes are detected.
460-include .kconfig.d
Bernhard Reutner-Fischer5c071bc2005-10-05 07:40:46 +0000461
Denis Vlasenko8bf7bb82006-10-05 17:42:55 +0000462-include .config
Bernhard Reutner-Fischer7ca61b62006-01-15 14:04:57 +0000463
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000464# If .config needs to be updated, it will be done via the dependency
465# that autoconf has on .config.
466# To avoid any implicit rule to kick in, define an empty command
467.config .kconfig.d: ;
Bernhard Reutner-Fischer5d261262006-03-01 22:54:48 +0000468
Denis Vlasenkob54b2082006-10-27 09:05:40 +0000469# Now we can define CFLAGS etc according to .config
470include $(srctree)/Makefile.flags
471
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000472# If .config is newer than include/autoconf.h, someone tinkered
473# with it and forgot to run make oldconfig.
474# If kconfig.d is missing then we are probarly in a cleaned tree so
475# we execute the config step to be sure to catch updated Kconfig files
476include/autoconf.h: .kconfig.d .config
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000477 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000478
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000479else
480# Dummy target needed, because used as prerequisite
481include/autoconf.h: ;
Bernhard Reutner-Fischer08c5a172006-01-25 15:58:04 +0000482endif
483
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000484# The all: target is the default when no target is given on the
485# command line.
486# This allow a user to issue only 'make' to build a kernel including modules
487# Defaults busybox but it is usually overriden in the arch makefile
488all: busybox
489
490-include $(srctree)/arch/$(ARCH)/Makefile
491
492# arch Makefile may override CC so keep this after arch Makefile is included
493#bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
494CHECKFLAGS += $(NOSTDINC_FLAGS)
495
496# warn about C99 declaration after statement
497CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
498
499# disable pointer signedness warnings in gcc 4.0
500CFLAGS += $(call cc-option,-Wno-pointer-sign,)
501
502# Default kernel image to build when no specific target is given.
503# KBUILD_IMAGE may be overruled on the commandline or
504# set in the environment
505# Also any assignments in arch/$(ARCH)/Makefile take precedence over
506# this default value
507export KBUILD_IMAGE ?= busybox
508
509#
510# INSTALL_PATH specifies where to place the updated kernel and system map
511# images. Default is /boot, but you can set it to other values
512export INSTALL_PATH ?= /boot
513
514#
515# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
516# relocations required by build roots. This is not defined in the
517# makefile but the arguement can be passed to make if needed.
518#
519
520MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
521export MODLIB
522
523
524ifeq ($(KBUILD_EXTMOD),)
525busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m)))
526
527busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \
528 $(core-n) $(core-) $(libs-n) $(libs-) \
529 )))
530
531core-y := $(patsubst %/, %/built-in.o, $(core-y))
532libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
533libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
534libs-y := $(libs-y1) $(libs-y2)
535
536
537# Build busybox
538# ---------------------------------------------------------------------------
539# busybox is build from the objects selected by $(busybox-init) and
540# $(busybox-main). Most are built-in.o files from top-level directories
541# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
542# Ordering when linking is important, and $(busybox-init) must be first.
543#
544# busybox
545# ^
546# |
547# +-< $(busybox-init)
548# | +--< init/version.o + more
549# |
550# +--< $(busybox-main)
551# | +--< driver/built-in.o mm/built-in.o + more
552# |
553# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
554#
555# busybox version (uname -v) cannot be updated during normal
556# descending-into-subdirs phase since we do not yet know if we need to
557# update busybox.
558# Therefore this step is delayed until just before final link of busybox -
559# except in the kallsyms case where it is done just before adding the
560# symbols to the kernel.
561#
562# System.map is generated to document addresses of all kernel symbols
563
564busybox-all := $(core-y) $(libs-y)
565
566# Rule to link busybox - also used during CONFIG_KALLSYMS
567# May be overridden by arch/$(ARCH)/Makefile
568quiet_cmd_busybox__ ?= LINK $@
Denis Vlasenkocba9ef52006-10-10 21:00:47 +0000569ifdef CONFIG_STATIC
Bernhard Reutner-Fischer9729e652006-12-13 17:44:24 +0000570 cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) $(LDFLAGS) \
Denis Vlasenkocba9ef52006-10-10 21:00:47 +0000571 -static \
572 -o $@ \
573 -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
574 -Wl,--start-group $(busybox-all) -Wl,--end-group
575else
Bernhard Reutner-Fischer9729e652006-12-13 17:44:24 +0000576 cmd_busybox__ ?= $(srctree)/scripts/trylink $(CC) -o $@ $(LDFLAGS) \
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000577 -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \
Denis Vlasenkocba9ef52006-10-10 21:00:47 +0000578 -Wl,--start-group $(busybox-all) -Wl,--end-group
579endif
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000580
581# Generate System.map
582quiet_cmd_sysmap = SYSMAP
583 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
584
585# Link of busybox
586# If CONFIG_KALLSYMS is set .version is already updated
587# Generate System.map and verify that the content is consistent
588# Use + in front of the busybox_version rule to silent warning with make -j2
589# First command is ':' to allow us to use + in front of the rule
590define rule_busybox__
591 :
592 $(call cmd,busybox__)
593 $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
594endef
595
596
597ifdef CONFIG_KALLSYMS
598# Generate section listing all symbols and add it into busybox $(kallsyms.o)
599# It's a three stage process:
600# o .tmp_busybox1 has all symbols and sections, but __kallsyms is
601# empty
602# Running kallsyms on that gives us .tmp_kallsyms1.o with
603# the right size - busybox version (uname -v) is updated during this step
604# o .tmp_busybox2 now has a __kallsyms section of the right size,
605# but due to the added section, some addresses have shifted.
606# From here, we generate a correct .tmp_kallsyms2.o
607# o The correct .tmp_kallsyms2.o is linked into the final busybox.
608# o Verify that the System.map from busybox matches the map from
609# .tmp_busybox2, just in case we did not generate kallsyms correctly.
610# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
611# .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a
612# temporary bypass to allow the kernel to be built while the
613# maintainers work out what went wrong with kallsyms.
614
615ifdef CONFIG_KALLSYMS_EXTRA_PASS
616last_kallsyms := 3
617else
618last_kallsyms := 2
Bernhard Reutner-Fischer7ca61b62006-01-15 14:04:57 +0000619endif
Bernhard Reutner-Fischer7ca61b62006-01-15 14:04:57 +0000620
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000621kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
Bernhard Reutner-Fischer7ca61b62006-01-15 14:04:57 +0000622
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000623define verify_kallsyms
624 $(Q)$(if $($(quiet)cmd_sysmap), \
625 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
626 $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map
627 $(Q)cmp -s System.map .tmp_System.map || \
628 (echo Inconsistent kallsyms data; \
629 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
630 rm .tmp_kallsyms* ; /bin/false )
631endef
632
633# Update busybox version before link
634# Use + in front of this rule to silent warning about make -j1
635# First command is ':' to allow us to use + in front of this rule
636cmd_ksym_ld = $(cmd_busybox__)
637define rule_ksym_ld
638 :
639 +$(call cmd,busybox_version)
640 $(call cmd,busybox__)
641 $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd
642endef
643
644# Generate .S file with all kernel symbols
645quiet_cmd_kallsyms = KSYM $@
646 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
647 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
648
649.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
650 $(call if_changed_dep,as_o_S)
651
652.tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS)
653 $(call cmd,kallsyms)
654
655# .tmp_busybox1 must be complete except kallsyms, so update busybox version
656.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE
657 $(call if_changed_rule,ksym_ld)
658
659.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE
660 $(call if_changed,busybox__)
661
662.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE
663 $(call if_changed,busybox__)
664
665# Needs to visit scripts/ before $(KALLSYMS) can be used.
666$(KALLSYMS): scripts ;
667
668# Generate some data for debugging strange kallsyms problems
669debug_kallsyms: .tmp_map$(last_kallsyms)
670
671.tmp_map%: .tmp_busybox% FORCE
672 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
673
674.tmp_map3: .tmp_map2
675
676.tmp_map2: .tmp_map1
677
678endif # ifdef CONFIG_KALLSYMS
679
680# busybox image - including updated kernel symbols
681busybox_unstripped: $(busybox-all) FORCE
682 $(call if_changed_rule,busybox__)
683 $(Q)rm -f .old_version
Bernhard Reutner-Fischercfc5d862006-03-02 09:44:32 +0000684
685busybox: busybox_unstripped
Denis Vlasenko4e33e072006-10-16 18:24:57 +0000686 $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000687 busybox_unstripped -o $@
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000688
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000689# The actual objects are generated when descending,
690# make sure no implicit rule kicks in
691$(sort $(busybox-all)): $(busybox-dirs) ;
Mike Frysinger586ea612006-04-21 01:18:07 +0000692
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000693# 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
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000698
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000699PHONY += $(busybox-dirs)
700$(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)
Eric Andersen13879102004-08-26 23:13:00 +0000734endif
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000735
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000736localver-full = $(localver)$(localver-auto)
Eric Andersen1f30a412002-04-13 13:39:48 +0000737
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000738# Store (new) KERNELRELASE string in .kernelrelease
739kernelrelease = $(KERNELVERSION)$(localver-full)
740.kernelrelease: FORCE
741 $(Q)rm -f $@
742 $(Q)echo $(kernelrelease) > $@
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000743
Rob Landleyd9872aa2006-05-27 21:24:16 +0000744
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000745# 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.
Rob Landleyd9872aa2006-05-27 21:24:16 +0000750
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000751# Listed in dependency order
752PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Rob Landley16890752005-09-02 00:41:53 +0000753
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000754# prepare-all is deprecated, use prepare as valid replacement
755PHONY += prepare-all
Rob Landleyd9872aa2006-05-27 21:24:16 +0000756
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000757# 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 kernel'
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; \
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000768 fi;
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000769 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
770 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
771endif
Eric Andersen85208e22002-04-12 12:05:57 +0000772
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000773# prepare2 creates a makefile if using a separate output directory
774prepare2: prepare3 outputmakefile
Eric Andersencc8ed391999-10-05 16:24:54 +0000775
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000776prepare1: prepare2 include/config/MARKER
777ifneq ($(KBUILD_MODULES),)
778 $(Q)mkdir -p $(MODVERDIR)
779 $(Q)rm -f $(MODVERDIR)/*
780endif
Eric Andersencc8ed391999-10-05 16:24:54 +0000781
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000782archprepare: prepare1 scripts_basic
Mark Whitleydd23b8b2000-07-10 23:00:47 +0000783
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000784prepare0: archprepare FORCE
785 $(Q)$(MAKE) $(build)=.
Matt Kraai4e05da82001-11-19 19:47:56 +0000786
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000787# All the preparing..
788prepare prepare-all: prepare0
Bernhard Reutner-Fischerfa61ca72006-06-16 17:19:39 +0000789
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000790# Leave this as default for preprocessing busybox.lds.S, which is now
791# done in arch/$(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) $@
803
804# Split autoconf.h into include/linux/config/*
805#bbox# piggybacked generation of few .h files
806include/config/MARKER: scripts/basic/split-include include/autoconf.h
807 @echo ' SPLIT include/autoconf.h -> include/config/*'
808 @scripts/basic/split-include include/autoconf.h include/config
809 @echo ' GEN include/bbconfigopts.h'
Denis Vlasenko18684092006-10-05 17:11:08 +0000810 @$(srctree)/scripts/mkconfigs >include/bbconfigopts.h
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000811 @touch $@
812
813# Generate some files
814# ---------------------------------------------------------------------------
815
816# KERNELRELEASE can change from a few different places, meaning version.h
817# needs to be updated, so this check is forced on all builds
818
819uts_len := 64
820
821define filechk_version.h
822 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
823 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
824 exit 1; \
825 fi; \
826 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
827 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
828 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
829 )
830endef
831
832# ---------------------------------------------------------------------------
833
834PHONY += depend dep
835depend dep:
836 @echo '*** Warning: make $@ is unnecessary now.'
837
838# ---------------------------------------------------------------------------
839# Modules
840
841ifdef CONFIG_MODULES
842
843# By default, build modules as well
844
845all: modules
846
847# Build modules
848
849PHONY += modules
850modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox)
851 @echo ' Building modules, stage 2.';
852 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
Bernhard Reutner-Fischerfa61ca72006-06-16 17:19:39 +0000853
Bernhard Reutner-Fischer07a79e72006-03-09 09:03:37 +0000854
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000855# Target to prepare building external modules
856PHONY += modules_prepare
857modules_prepare: prepare scripts
Bernhard Reutner-Fischerdf100942006-03-13 19:04:00 +0000858
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000859# Target to install modules
860PHONY += modules_install
861modules_install: _modinst_ _modinst_post
862
863PHONY += _modinst_
864_modinst_:
865 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
866 echo "Warning: you may need to install module-init-tools"; \
867 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
868 sleep 1; \
869 fi
870 @rm -rf $(MODLIB)/kernel
871 @rm -f $(MODLIB)/source
872 @mkdir -p $(MODLIB)/kernel
873 @ln -s $(srctree) $(MODLIB)/source
874 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
875 rm -f $(MODLIB)/build ; \
876 ln -s $(objtree) $(MODLIB)/build ; \
877 fi
878 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
879
880# If System.map exists, run depmod. This deliberately does not have a
881# dependency on System.map since that would run the dependency tree on
882# busybox. This depmod is only for convenience to give the initial
883# boot a modules.dep even before / is mounted read-write. However the
884# boot script depmod is the master version.
885ifeq "$(strip $(INSTALL_MOD_PATH))" ""
886depmod_opts :=
887else
888depmod_opts := -b $(INSTALL_MOD_PATH) -r
889endif
890PHONY += _modinst_post
891_modinst_post: _modinst_
892 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
893
894else # CONFIG_MODULES
895
896# Modules not configured
897# ---------------------------------------------------------------------------
898
899modules modules_install: FORCE
900 @echo
Denis Vlasenkoeb98be02006-11-30 22:40:32 +0000901 @echo "The present busybox configuration has modules disabled."
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000902 @echo "Type 'make config' and enable loadable module support."
903 @echo "Then build a kernel with module support enabled."
904 @echo
905 @exit 1
906
907endif # CONFIG_MODULES
908
909###
910# Cleaning is done on three levels.
911# make clean Delete most generated files
912# Leave enough to build external modules
913# make mrproper Delete the current configuration, and all generated files
914# make distclean Remove editor backup files, patch leftover files and the like
915
916# Directories & files removed with 'make clean'
917CLEAN_DIRS += $(MODVERDIR)
Denis Vlasenko8bf7bb82006-10-05 17:42:55 +0000918CLEAN_FILES += busybox* System.map \
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000919 .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map
920
921# Directories & files removed with 'make mrproper'
922MRPROPER_DIRS += include/config include2
923MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Denis Vlasenko8bf7bb82006-10-05 17:42:55 +0000924 include/autoconf.h \
925 include/bbconfigopts.h \
926 include/usage_compressed.h \
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000927 .kernelrelease Module.symvers tags TAGS cscope*
928
929# clean - Delete most, but leave enough to build external modules
930#
931clean: rm-dirs := $(CLEAN_DIRS)
932clean: rm-files := $(CLEAN_FILES)
933clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs))
934
935PHONY += $(clean-dirs) clean archclean
936$(clean-dirs):
937 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
938
939clean: archclean $(clean-dirs)
940 $(call cmd,rmdirs)
941 $(call cmd,rmfiles)
942 @find . $(RCS_FIND_IGNORE) \
943 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
944 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
945 -type f -print | xargs rm -f
946
947# mrproper - Delete all generated files, including .config
948#
949mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
950mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
Denis Vlasenko8bf7bb82006-10-05 17:42:55 +0000951mrproper-dirs := $(addprefix _mrproper_,scripts)
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000952
953PHONY += $(mrproper-dirs) mrproper archmrproper
954$(mrproper-dirs):
955 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
956
957mrproper: clean archmrproper $(mrproper-dirs)
958 $(call cmd,rmdirs)
959 $(call cmd,rmfiles)
960
961# distclean
962#
963PHONY += distclean
964
965distclean: mrproper
966 @find $(srctree) $(RCS_FIND_IGNORE) \
967 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
968 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
969 -o -name '.*.rej' -o -size 0 \
970 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
971 -type f -print | xargs rm -f
972
973
974# Packaging of the kernel to various formats
975# ---------------------------------------------------------------------------
976# rpm target kept for backward compatibility
977package-dir := $(srctree)/scripts/package
978
979%pkg: FORCE
980 $(Q)$(MAKE) $(build)=$(package-dir) $@
981rpm: FORCE
982 $(Q)$(MAKE) $(build)=$(package-dir) $@
983
984
985# Brief documentation of the typical targets used
986# ---------------------------------------------------------------------------
987
988boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
989boards := $(notdir $(boards))
990
Denis Vlasenko14aa9f72006-10-31 23:03:09 +0000991-include $(srctree)/Makefile.help
Denis Vlasenko7d219aa2006-10-05 10:17:08 +0000992
993# Documentation targets
994# ---------------------------------------------------------------------------
995%docs: scripts_basic FORCE
996 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
997
998else # KBUILD_EXTMOD
999
1000###
1001# External module support.
1002# When building external modules the kernel used as basis is considered
1003# read-only, and no consistency checks are made and the make
1004# system is not used on the basis kernel. If updates are required
1005# in the basis kernel ordinary make commands (without M=...) must
1006# be used.
1007#
1008# The following are the only valid targets when building external
1009# modules.
1010# make M=dir clean Delete all automatically generated files
1011# make M=dir modules Make all modules in specified dir
1012# make M=dir Same as 'make M=dir modules'
1013# make M=dir modules_install
1014# Install the modules build in the module directory
1015# Assumes install directory is already created
1016
1017# We are always building modules
1018KBUILD_MODULES := 1
1019PHONY += crmodverdir
1020crmodverdir:
1021 $(Q)mkdir -p $(MODVERDIR)
1022 $(Q)rm -f $(MODVERDIR)/*
1023
1024PHONY += $(objtree)/Module.symvers
1025$(objtree)/Module.symvers:
1026 @test -e $(objtree)/Module.symvers || ( \
1027 echo; \
1028 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1029 echo " is missing; modules will have no dependencies and modversions."; \
1030 echo )
1031
1032module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1033PHONY += $(module-dirs) modules
1034$(module-dirs): crmodverdir $(objtree)/Module.symvers
1035 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1036
1037modules: $(module-dirs)
1038 @echo ' Building modules, stage 2.';
1039 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1040
1041PHONY += modules_install
1042modules_install: _emodinst_ _emodinst_post
1043
1044install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1045PHONY += _emodinst_
1046_emodinst_:
1047 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1048 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1049
1050# Run depmod only is we have System.map and depmod is executable
1051quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1052 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1053 $(DEPMOD) -ae -F System.map \
1054 $(if $(strip $(INSTALL_MOD_PATH)), \
1055 -b $(INSTALL_MOD_PATH) -r) \
1056 $(KERNELRELEASE); \
1057 fi
1058
1059PHONY += _emodinst_post
1060_emodinst_post: _emodinst_
1061 $(call cmd,depmod)
1062
1063clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1064
1065PHONY += $(clean-dirs) clean
1066$(clean-dirs):
1067 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1068
1069clean: rm-dirs := $(MODVERDIR)
1070clean: $(clean-dirs)
1071 $(call cmd,rmdirs)
1072 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1073 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1074 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1075 -type f -print | xargs rm -f
1076
1077help:
1078 @echo ' Building external modules.'
1079 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1080 @echo ''
1081 @echo ' modules - default target, build the module(s)'
1082 @echo ' modules_install - install the module'
1083 @echo ' clean - remove generated files in module directory only'
1084 @echo ''
1085
1086# Dummies...
1087PHONY += prepare scripts
1088prepare: ;
1089scripts: ;
1090endif # KBUILD_EXTMOD
1091
1092# Generate tags for editors
1093# ---------------------------------------------------------------------------
1094
1095#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1096#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1097#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1098
1099ifeq ($(src),$(obj))
1100__srctree =
1101else
1102__srctree = $(srctree)/
1103endif
1104
1105ifeq ($(ALLSOURCE_ARCHS),)
1106ifeq ($(ARCH),um)
1107ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1108else
1109ALLINCLUDE_ARCHS := $(ARCH)
1110endif
1111else
1112#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1113ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1114endif
1115
1116ALLSOURCE_ARCHS := $(ARCH)
1117
1118define all-sources
1119 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1120 \( -name include -o -name arch \) -prune -o \
1121 -name '*.[chS]' -print; \
1122 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1123 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1124 -name '*.[chS]' -print; \
1125 done ; \
1126 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1127 -name '*.[chS]' -print; \
1128 find $(__srctree)include $(RCS_FIND_IGNORE) \
1129 \( -name config -o -name 'asm-*' \) -prune \
1130 -o -name '*.[chS]' -print; \
1131 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1132 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1133 -name '*.[chS]' -print; \
1134 done ; \
1135 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1136 -name '*.[chS]' -print )
1137endef
1138
1139quiet_cmd_cscope-file = FILELST cscope.files
1140 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1141
1142quiet_cmd_cscope = MAKE cscope.out
1143 cmd_cscope = cscope -b
1144
1145cscope: FORCE
1146 $(call cmd,cscope-file)
1147 $(call cmd,cscope)
1148
1149quiet_cmd_TAGS = MAKE $@
1150define cmd_TAGS
1151 rm -f $@; \
1152 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1153 echo "-I __initdata,__exitdata,__acquires,__releases \
1154 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1155 --extra=+f --c-kinds=+px"`; \
1156 $(all-sources) | xargs etags $$ETAGSF -a
1157endef
1158
1159TAGS: FORCE
1160 $(call cmd,TAGS)
1161
1162
1163quiet_cmd_tags = MAKE $@
1164define cmd_tags
1165 rm -f $@; \
1166 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1167 echo "-I __initdata,__exitdata,__acquires,__releases \
1168 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1169 --extra=+f --c-kinds=+px"`; \
1170 $(all-sources) | xargs ctags $$CTAGSF -a
1171endef
1172
1173tags: FORCE
1174 $(call cmd,tags)
1175
1176
1177# Scripts to check various things for consistency
1178# ---------------------------------------------------------------------------
1179
1180includecheck:
1181 find * $(RCS_FIND_IGNORE) \
1182 -name '*.[hcS]' -type f -print | sort \
1183 | xargs $(PERL) -w scripts/checkincludes.pl
1184
1185versioncheck:
1186 find * $(RCS_FIND_IGNORE) \
1187 -name '*.[hcS]' -type f -print | sort \
1188 | xargs $(PERL) -w scripts/checkversion.pl
1189
1190namespacecheck:
1191 $(PERL) $(srctree)/scripts/namespace.pl
1192
1193endif #ifeq ($(config-targets),1)
1194endif #ifeq ($(mixed-targets),1)
1195
1196PHONY += checkstack
1197checkstack:
1198 $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \
1199 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1200
1201kernelrelease:
1202 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1203 $(error kernelrelease not valid - run 'make *config' to update it))
1204kernelversion:
1205 @echo $(KERNELVERSION)
1206
1207# Single targets
1208# ---------------------------------------------------------------------------
1209# Single targets are compatible with:
1210# - build whith mixed source and output
1211# - build with separate output dir 'make O=...'
1212# - external modules
1213#
1214# target-dir => where to store outputfile
1215# build-dir => directory in kernel source tree to use
1216
1217ifeq ($(KBUILD_EXTMOD),)
1218 build-dir = $(patsubst %/,%,$(dir $@))
1219 target-dir = $(dir $@)
1220else
1221 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1222 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1223 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1224endif
1225
1226%.s: %.c prepare scripts FORCE
1227 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1228%.i: %.c prepare scripts FORCE
1229 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1230%.o: %.c prepare scripts FORCE
1231 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1232%.lst: %.c prepare scripts FORCE
1233 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1234%.s: %.S prepare scripts FORCE
1235 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1236%.o: %.S prepare scripts FORCE
1237 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1238
1239# Modules
1240/ %/: prepare scripts FORCE
1241 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1242 $(build)=$(build-dir)
1243%.ko: prepare scripts FORCE
1244 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1245 $(build)=$(build-dir) $(@:.ko=.o)
1246 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1247
1248# FIXME Should go into a make.lib or something
1249# ===========================================================================
1250
1251quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1252 cmd_rmdirs = rm -rf $(rm-dirs)
1253
1254quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1255 cmd_rmfiles = rm -f $(rm-files)
1256
1257
1258a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1259 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1260 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1261
1262quiet_cmd_as_o_S = AS $@
1263cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1264
1265# read all saved command lines
1266
1267targets := $(wildcard $(sort $(targets)))
1268cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1269
1270ifneq ($(cmd_files),)
1271 $(cmd_files): ; # Do not try to update included dependency files
1272 include $(cmd_files)
1273endif
1274
1275# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1276# Usage:
1277# $(Q)$(MAKE) $(clean)=dir
1278clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1279
1280endif # skip-makefile
1281
1282PHONY += FORCE
1283FORCE:
1284
Denis Vlasenko14aa9f72006-10-31 23:03:09 +00001285-include $(srctree)/Makefile.custom
Denis Vlasenko7d219aa2006-10-05 10:17:08 +00001286
1287# Declare the contents of the .PHONY variable as phony. We keep that
1288# information in a variable se we can use it in if_changed and friends.
1289.PHONY: $(PHONY)