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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds2664b252006-01-16 23:44:47 -08003SUBLEVEL = 16
Linus Torvaldsbd71c2b2006-02-17 14:23:45 -08004EXTRAVERSION =-rc4
Linus Torvaldsdf7addb2005-12-18 16:36:54 -08005NAME=Sliding Snow Leopard
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
7# *DOCUMENTATION*
8# To see a list of typical targets execute "make help"
9# More info can be located in ./README
10# Comments in this file are targeted only to the developer, do not
11# expect to learn how to build the kernel reading this file.
12
13# Do not print "Entering directory ..."
14MAKEFLAGS += --no-print-directory
15
16# We are using a recursive build, so we need to do a little thinking
17# to get the ordering right.
18#
19# Most importantly: sub-Makefiles should only ever modify files in
20# their own directory. If in some directory we have a dependency on
21# a file in another dir (which doesn't happen often, but it's often
22# unavoidable when linking the built-in.o targets which finally
23# turn into vmlinux), we will call a sub make in that other dir, and
24# after that we are sure that everything which is in that other dir
25# is now up to date.
26#
27# The only cases where we need to modify files which have global
28# effects are thus separated out and done before the recursive
29# descending is started. They are now explicitly listed as the
30# prepare rule.
31
32# To put more focus on warnings, be less verbose as default
33# Use 'make V=1' to see the full commands
34
35ifdef V
36 ifeq ("$(origin V)", "command line")
37 KBUILD_VERBOSE = $(V)
38 endif
39endif
40ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42endif
43
44# Call sparse as part of compilation of C files
45# Use 'make C=1' to enable sparse checking
46
47ifdef C
48 ifeq ("$(origin C)", "command line")
49 KBUILD_CHECKSRC = $(C)
50 endif
51endif
52ifndef KBUILD_CHECKSRC
53 KBUILD_CHECKSRC = 0
54endif
55
56# Use make M=dir to specify directory of external module to build
57# Old syntax make ... SUBDIRS=$PWD is still supported
58# Setting the environment variable KBUILD_EXTMOD take precedence
59ifdef SUBDIRS
60 KBUILD_EXTMOD ?= $(SUBDIRS)
61endif
62ifdef M
63 ifeq ("$(origin M)", "command line")
64 KBUILD_EXTMOD := $(M)
65 endif
66endif
67
68
69# kbuild supports saving output files in a separate directory.
70# To locate output files in a separate directory two syntaxes are supported.
71# In both cases the working directory must be the root of the kernel src.
72# 1) O=
73# Use "make O=dir/to/store/output/files/"
74#
75# 2) Set KBUILD_OUTPUT
76# Set the environment variable KBUILD_OUTPUT to point to the directory
77# where the output files shall be placed.
78# export KBUILD_OUTPUT=dir/to/store/output/files/
79# make
80#
81# The O= assignment takes precedence over the KBUILD_OUTPUT environment
82# variable.
83
84
85# KBUILD_SRC is set on invocation of make in OBJ directory
86# KBUILD_SRC is not intended to be used by the regular user (for now)
87ifeq ($(KBUILD_SRC),)
88
89# OK, Make called in directory where kernel src resides
90# Do we want to locate output files in a separate directory?
91ifdef O
92 ifeq ("$(origin O)", "command line")
93 KBUILD_OUTPUT := $(O)
94 endif
95endif
96
97# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -050098PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -070099_all:
100
101ifneq ($(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
Paul Smith4f193362006-03-05 17:14:10 -0500109PHONY += $(MAKECMDGOALS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800111$(filter-out _all,$(MAKECMDGOALS)) _all:
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200112 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
113 KBUILD_SRC=$(CURDIR) \
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800114 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
116# Leave processing to above invocation of make
117skip-makefile := 1
118endif # ifneq ($(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
Paul Smith4f193362006-03-05 17:14:10 -0500126PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127ifeq ($(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
Mattia Dongili0f558c32006-02-19 13:50:37 +0100140VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142export srctree objtree VPATH TOPDIR
143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
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/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800153 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Martin Michlmayr89992572006-01-28 18:38:15 +0000154 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
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
186HOSTCC = gcc
187HOSTCXX = g++
188HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
189HOSTCXXFLAGS = -O2
190
191# Decide whether to build built-in, modular, or both.
192# Normally, just do built-in.
193
194KBUILD_MODULES :=
195KBUILD_BUILTIN := 1
196
197# 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.
201
202ifeq ($(MAKECMDGOALS),modules)
203 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
204endif
205
206# If we have "make <whatever> modules", compile modules
207# in addition to whatever we do anyway.
208# Just "make" or "make all" shall build modules as well
209
210ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
211 KBUILD_MODULES := 1
212endif
213
214ifeq ($(MAKECMDGOALS),)
215 KBUILD_MODULES := 1
216endif
217
Sam Ravnborge579d352005-07-27 08:10:10 +0200218export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219export 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#
Adrian Bunka58a4142006-01-10 00:08:17 +0100236# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237# 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
260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262# Look for make include files relative to root of kernel src
263MAKEFLAGS += --include-dir=$(srctree)
264
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000265# We need some generic definitions
Sam Ravnborg2a691472005-07-25 20:26:04 +0000266include $(srctree)/scripts/Kbuild.include
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268# For maximum performance (+ possibly random breakage, uncomment
269# the following)
270
271#MAKEFLAGS += -rR
272
273# 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
Al Viroaf4ca452005-10-21 02:55:38 -0400291CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292MODFLAGS = -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
302LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100303 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800304 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
306CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
307
Olaf Hering3c521e02005-07-21 21:02:09 +0200308CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 -fno-strict-aliasing -fno-common \
310 -ffreestanding
311AFLAGS := -D__ASSEMBLY__
312
Sam Ravnborgcb584552006-01-09 21:20:34 +0100313# Read KERNELRELEASE from .kernelrelease (if it exists)
314KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100315KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100316
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100317export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
319 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
320 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
321
322export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
323export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
324export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
325
326# When compiling out-of-tree modules, put MODVERDIR in the module
327# tree rather than in the kernel tree. The kernel tree might
328# even be read-only.
329export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
330
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331# Files to ignore in find ... statements
332
Trond Myklebust406119f2005-10-27 14:46:53 -0400333RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
334export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
336# ===========================================================================
337# Rules shared between *config targets and build targets
338
339# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500340PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341scripts_basic:
342 $(Q)$(MAKE) $(build)=scripts/basic
343
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200344# To avoid any implicit rule to kick in, define an empty command.
345scripts/basic/%: scripts_basic ;
346
Paul Smith4f193362006-03-05 17:14:10 -0500347PHONY += outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348# outputmakefile generate a Makefile to be placed in output directory, if
349# using a seperate output directory. This allows convinient use
350# of make in output directory
351outputmakefile:
352 $(Q)if test ! $(srctree) -ef $(objtree); then \
353 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
354 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
355 > $(objtree)/Makefile; \
356 echo ' GEN $(objtree)/Makefile'; \
357 fi
358
359# To make sure we do not include .config for any of the *config targets
360# catch them early, and hand them over to scripts/kconfig/Makefile
361# It is allowed to specify more targets when calling make, including
362# mixing *config targets and build targets.
363# For example 'make oldconfig all'.
364# Detect when mixed targets is specified, and make a second invocation
365# of make so .config is not included in this case either (for *config).
366
367no-dot-config-targets := clean mrproper distclean \
Andreas Schwab6b6a4622005-12-12 00:37:03 -0800368 cscope TAGS tags help %docs check%
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370config-targets := 0
371mixed-targets := 0
372dot-config := 1
373
374ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
375 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
376 dot-config := 0
377 endif
378endif
379
380ifeq ($(KBUILD_EXTMOD),)
381 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
382 config-targets := 1
383 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
384 mixed-targets := 1
385 endif
386 endif
387endif
388
389ifeq ($(mixed-targets),1)
390# ===========================================================================
391# We're called with mixed targets (*config and build targets).
392# Handle them one by one.
393
394%:: FORCE
395 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
396
397else
398ifeq ($(config-targets),1)
399# ===========================================================================
400# *config targets only - make sure prerequisites are updated, and descend
401# in scripts/kconfig to make the *config target
402
403# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
404# KBUILD_DEFCONFIG may point out an alternative default configuration
405# used for 'make defconfig'
406include $(srctree)/arch/$(ARCH)/Makefile
407export KBUILD_DEFCONFIG
408
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200409config %config: scripts_basic outputmakefile FORCE
410 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 $(Q)$(MAKE) $(build)=scripts/kconfig $@
Sam Ravnborg8c7f75d2006-01-21 12:07:56 +0100412 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
414else
415# ===========================================================================
416# Build targets only - this includes vmlinux, arch specific targets, clean
417# targets and others. In general all targets except *config targets.
418
419ifeq ($(KBUILD_EXTMOD),)
420# Additional helpers built in scripts/
421# Carefully list dependencies so we do not try to build scripts twice
422# in parrallel
Paul Smith4f193362006-03-05 17:14:10 -0500423PHONY += scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424scripts: scripts_basic include/config/MARKER
425 $(Q)$(MAKE) $(build)=$(@)
426
427scripts_basic: include/linux/autoconf.h
428
429# Objects we will link into vmlinux / subdirs we need to visit
430init-y := init/
431drivers-y := drivers/ sound/
432net-y := net/
433libs-y := lib/
434core-y := usr/
435endif # KBUILD_EXTMOD
436
437ifeq ($(dot-config),1)
438# In this section, we need .config
439
440# Read in dependencies to all Kconfig* files, make sure to run
441# oldconfig if changes are detected.
Sam Ravnborg752625c2005-12-26 23:34:03 +0100442-include .kconfig.d
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
444include .config
445
446# If .config needs to be updated, it will be done via the dependency
447# that autoconf has on .config.
448# To avoid any implicit rule to kick in, define an empty command
Sam Ravnborg752625c2005-12-26 23:34:03 +0100449.config .kconfig.d: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450
451# If .config is newer than include/linux/autoconf.h, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100452# with it and forgot to run make oldconfig.
453# If kconfig.d is missing then we are probarly in a cleaned tree so
454# we execute the config step to be sure to catch updated Kconfig files
455include/linux/autoconf.h: .kconfig.d .config
Sam Ravnborg5011cdd2005-09-11 22:32:57 +0200456 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
458else
459# Dummy target needed, because used as prerequisite
460include/linux/autoconf.h: ;
461endif
462
463# The all: target is the default when no target is given on the
464# command line.
465# This allow a user to issue only 'make' to build a kernel including modules
466# Defaults vmlinux but it is usually overriden in the arch makefile
467all: vmlinux
468
469ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
470CFLAGS += -Os
471else
472CFLAGS += -O2
473endif
474
475#Add align options if CONFIG_CC_* is not equal to 0
476add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
477CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
478CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
479CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
480CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
481
482ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700483CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484else
485CFLAGS += -fomit-frame-pointer
486endif
487
488ifdef CONFIG_DEBUG_INFO
489CFLAGS += -g
490endif
491
492include $(srctree)/arch/$(ARCH)/Makefile
493
Sam Ravnborge8e69932005-04-30 16:51:42 -0700494# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700495NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700496CHECKFLAGS += $(NOSTDINC_FLAGS)
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498# warn about C99 declaration after statement
499CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
500
501# disable pointer signedness warnings in gcc 4.0
502CFLAGS += $(call cc-option,-Wno-pointer-sign,)
503
504# Default kernel image to build when no specific target is given.
505# KBUILD_IMAGE may be overruled on the commandline or
506# set in the environment
507# Also any assignments in arch/$(ARCH)/Makefile take precedence over
508# this default value
509export KBUILD_IMAGE ?= vmlinux
510
511#
512# INSTALL_PATH specifies where to place the updated kernel and system map
513# images. Default is /boot, but you can set it to other values
514export INSTALL_PATH ?= /boot
515
516#
517# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
518# relocations required by build roots. This is not defined in the
519# makefile but the arguement can be passed to make if needed.
520#
521
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100522MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523export MODLIB
524
525
526ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100527core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
529vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
530 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
531 $(net-y) $(net-m) $(libs-y) $(libs-m)))
532
533vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
534 $(init-n) $(init-) \
535 $(core-n) $(core-) $(drivers-n) $(drivers-) \
536 $(net-n) $(net-) $(libs-n) $(libs-))))
537
538init-y := $(patsubst %/, %/built-in.o, $(init-y))
539core-y := $(patsubst %/, %/built-in.o, $(core-y))
540drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
541net-y := $(patsubst %/, %/built-in.o, $(net-y))
542libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
543libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
544libs-y := $(libs-y1) $(libs-y2)
545
546# Build vmlinux
547# ---------------------------------------------------------------------------
548# vmlinux is build from the objects selected by $(vmlinux-init) and
549# $(vmlinux-main). Most are built-in.o files from top-level directories
550# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
551# Ordering when linking is important, and $(vmlinux-init) must be first.
552#
553# vmlinux
554# ^
555# |
556# +-< $(vmlinux-init)
557# | +--< init/version.o + more
558# |
559# +--< $(vmlinux-main)
560# | +--< driver/built-in.o mm/built-in.o + more
561# |
562# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
563#
564# vmlinux version (uname -v) cannot be updated during normal
565# descending-into-subdirs phase since we do not yet know if we need to
566# update vmlinux.
567# Therefore this step is delayed until just before final link of vmlinux -
568# except in the kallsyms case where it is done just before adding the
569# symbols to the kernel.
570#
571# System.map is generated to document addresses of all kernel symbols
572
573vmlinux-init := $(head-y) $(init-y)
574vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
575vmlinux-all := $(vmlinux-init) $(vmlinux-main)
576vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
577
578# Rule to link vmlinux - also used during CONFIG_KALLSYMS
579# May be overridden by arch/$(ARCH)/Makefile
580quiet_cmd_vmlinux__ ?= LD $@
581 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
582 -T $(vmlinux-lds) $(vmlinux-init) \
583 --start-group $(vmlinux-main) --end-group \
584 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
585
586# Generate new vmlinux version
587quiet_cmd_vmlinux_version = GEN .version
588 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200589 if [ ! -r .version ]; then \
590 rm -f .version; \
591 echo 1 >.version; \
592 else \
593 mv .version .old_version; \
594 expr 0$$(cat .old_version) + 1 >.version; \
595 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 $(MAKE) $(build)=init
597
598# Generate System.map
599quiet_cmd_sysmap = SYSMAP
600 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
601
602# Link of vmlinux
603# If CONFIG_KALLSYMS is set .version is already updated
604# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700605# Use + in front of the vmlinux_version rule to silent warning with make -j2
606# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700608 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
610
611 $(call cmd,vmlinux__)
612 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
613
614 $(Q)$(if $($(quiet)cmd_sysmap), \
615 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
616 $(cmd_sysmap) $@ System.map; \
617 if [ $$? -ne 0 ]; then \
618 rm -f $@; \
619 /bin/false; \
620 fi;
621 $(verify_kallsyms)
622endef
623
624
625ifdef CONFIG_KALLSYMS
626# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
627# It's a three stage process:
628# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
629# empty
630# Running kallsyms on that gives us .tmp_kallsyms1.o with
631# the right size - vmlinux version (uname -v) is updated during this step
632# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
633# but due to the added section, some addresses have shifted.
634# From here, we generate a correct .tmp_kallsyms2.o
635# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
636# o Verify that the System.map from vmlinux matches the map from
637# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
638# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
639# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
640# temporary bypass to allow the kernel to be built while the
641# maintainers work out what went wrong with kallsyms.
642
643ifdef CONFIG_KALLSYMS_EXTRA_PASS
644last_kallsyms := 3
645else
646last_kallsyms := 2
647endif
648
649kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
650
651define verify_kallsyms
652 $(Q)$(if $($(quiet)cmd_sysmap), \
653 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
654 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
655 $(Q)cmp -s System.map .tmp_System.map || \
656 (echo Inconsistent kallsyms data; \
657 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
658 rm .tmp_kallsyms* ; /bin/false )
659endef
660
661# Update vmlinux version before link
662# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200663# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664cmd_ksym_ld = $(cmd_vmlinux__)
665define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200666 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 +$(call cmd,vmlinux_version)
668 $(call cmd,vmlinux__)
669 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
670endef
671
672# Generate .S file with all kernel symbols
673quiet_cmd_kallsyms = KSYM $@
674 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
675 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
676
677.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
678 $(call if_changed_dep,as_o_S)
679
680.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
681 $(call cmd,kallsyms)
682
683# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
684.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
685 $(call if_changed_rule,ksym_ld)
686
687.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
688 $(call if_changed,vmlinux__)
689
690.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
691 $(call if_changed,vmlinux__)
692
693# Needs to visit scripts/ before $(KALLSYMS) can be used.
694$(KALLSYMS): scripts ;
695
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000696# Generate some data for debugging strange kallsyms problems
697debug_kallsyms: .tmp_map$(last_kallsyms)
698
699.tmp_map%: .tmp_vmlinux% FORCE
700 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
701
702.tmp_map3: .tmp_map2
703
704.tmp_map2: .tmp_map1
705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706endif # ifdef CONFIG_KALLSYMS
707
708# vmlinux image - including updated kernel symbols
709vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
710 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200711 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713# The actual objects are generated when descending,
714# make sure no implicit rule kicks in
715$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
716
717# Handle descending into subdirectories listed in $(vmlinux-dirs)
718# Preset locale variables to speed up the build process. Limit locale
719# tweaks to this spot to avoid wrong language settings when running
720# make menuconfig etc.
721# Error messages still appears in the original language
722
Paul Smith4f193362006-03-05 17:14:10 -0500723PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200724$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 $(Q)$(MAKE) $(build)=$@
726
Sam Ravnborgcb584552006-01-09 21:20:34 +0100727# Build the kernel release string
728# The KERNELRELEASE is stored in a file named .kernelrelease
729# to be used when executing for example make install or make modules_install
730#
731# Take the contents of any files called localversion* and the config
732# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
733# LOCALVERSION from the command line override all of this
734
735nullstring :=
736space := $(nullstring) # end of line
737
738___localver = $(objtree)/localversion* $(srctree)/localversion*
739__localver = $(sort $(wildcard $(___localver)))
740# skip backup files (containing '~')
741_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
742
743localver = $(subst $(space),, \
744 $(shell cat /dev/null $(_localver)) \
745 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
746
747# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
748# and if the SCM is know a tag from the SCM is appended.
749# The appended tag is determinded by the SCM used.
750#
751# Currently, only git is supported.
752# Other SCMs can edit scripts/setlocalversion and add the appropriate
753# checks as needed.
754ifdef CONFIG_LOCALVERSION_AUTO
755 _localver-auto = $(shell $(CONFIG_SHELL) \
756 $(srctree)/scripts/setlocalversion $(srctree))
757 localver-auto = $(LOCALVERSION)$(_localver-auto)
758endif
759
760localver-full = $(localver)$(localver-auto)
761
762# Store (new) KERNELRELASE string in .kernelrelease
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100763kernelrelease = $(KERNELVERSION)$(localver-full)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100764.kernelrelease: FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100765 $(Q)rm -f $@
766 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100767
768
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200770# or the modules are listed in "prepare".
771# A multi level approach is used. prepareN is processed before prepareN-1.
772# archprepare is used in arch Makefiles and when processed asm symlink,
773# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200775# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500776PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200777
778# prepare-all is deprecated, use prepare as valid replacement
Paul Smith4f193362006-03-05 17:14:10 -0500779PHONY += prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200781# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782# and if so do:
783# 1) Check that make has not been executed in the kernel src $(srctree)
784# 2) Create the include2 directory, used for the second asm symlink
Sam Ravnborgcb584552006-01-09 21:20:34 +0100785prepare3: .kernelrelease
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786ifneq ($(KBUILD_SRC),)
787 @echo ' Using $(srctree) as source for kernel'
Sam Ravnborgd80e2242005-07-14 20:22:39 +0000788 $(Q)if [ -f $(srctree)/.config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 echo " $(srctree) is not clean, please run 'make mrproper'";\
790 echo " in the '$(srctree)' directory.";\
791 /bin/false; \
792 fi;
793 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
794 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
795endif
796
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200797# prepare2 creates a makefile if using a separate output directory
798prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200800prepare1: prepare2 include/linux/version.h include/asm \
Sam Ravnborgd80e2242005-07-14 20:22:39 +0000801 include/config/MARKER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802ifneq ($(KBUILD_MODULES),)
803 $(Q)rm -rf $(MODVERDIR)
804 $(Q)mkdir -p $(MODVERDIR)
805endif
806
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200807archprepare: prepare1 scripts_basic
808
809prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200810 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200813prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
815# Leave this as default for preprocessing vmlinux.lds.S, which is now
816# done in arch/$(ARCH)/kernel/Makefile
817
818export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
819
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820# FIXME: The asm symlink changes when $(ARCH) changes. That's
821# hard to detect, but I suppose "make mrproper" is a good idea
822# before switching between archs anyway.
823
824include/asm:
825 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
826 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
827 @ln -fsn asm-$(ARCH) $@
828
829# Split autoconf.h into include/linux/config/*
830
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200831include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
833 @scripts/basic/split-include include/linux/autoconf.h include/config
834 @touch $@
835
836# Generate some files
837# ---------------------------------------------------------------------------
838
839# KERNELRELEASE can change from a few different places, meaning version.h
840# needs to be updated, so this check is forced on all builds
841
842uts_len := 64
843
844define filechk_version.h
845 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
846 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
847 exit 1; \
848 fi; \
849 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
850 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
851 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
852 )
853endef
854
Jan Beulichc3f9da92006-02-22 13:29:04 +0100855include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 $(call filechk,version.h)
857
858# ---------------------------------------------------------------------------
859
Paul Smith4f193362006-03-05 17:14:10 -0500860PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861depend dep:
862 @echo '*** Warning: make $@ is unnecessary now.'
863
864# ---------------------------------------------------------------------------
865# Modules
866
867ifdef CONFIG_MODULES
868
869# By default, build modules as well
870
871all: modules
872
873# Build modules
874
Paul Smith4f193362006-03-05 17:14:10 -0500875PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
877 @echo ' Building modules, stage 2.';
878 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
879
880
881# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500882PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200883modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884
885# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500886PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887modules_install: _modinst_ _modinst_post
888
Paul Smith4f193362006-03-05 17:14:10 -0500889PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700891 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 echo "Warning: you may need to install module-init-tools"; \
893 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
894 sleep 1; \
895 fi
896 @rm -rf $(MODLIB)/kernel
897 @rm -f $(MODLIB)/source
898 @mkdir -p $(MODLIB)/kernel
899 @ln -s $(srctree) $(MODLIB)/source
900 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
901 rm -f $(MODLIB)/build ; \
902 ln -s $(objtree) $(MODLIB)/build ; \
903 fi
904 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
905
906# If System.map exists, run depmod. This deliberately does not have a
907# dependency on System.map since that would run the dependency tree on
908# vmlinux. This depmod is only for convenience to give the initial
909# boot a modules.dep even before / is mounted read-write. However the
910# boot script depmod is the master version.
911ifeq "$(strip $(INSTALL_MOD_PATH))" ""
912depmod_opts :=
913else
914depmod_opts := -b $(INSTALL_MOD_PATH) -r
915endif
Paul Smith4f193362006-03-05 17:14:10 -0500916PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917_modinst_post: _modinst_
918 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
919
920else # CONFIG_MODULES
921
922# Modules not configured
923# ---------------------------------------------------------------------------
924
925modules modules_install: FORCE
926 @echo
927 @echo "The present kernel configuration has modules disabled."
928 @echo "Type 'make config' and enable loadable module support."
929 @echo "Then build a kernel with module support enabled."
930 @echo
931 @exit 1
932
933endif # CONFIG_MODULES
934
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935###
936# Cleaning is done on three levels.
937# make clean Delete most generated files
938# Leave enough to build external modules
939# make mrproper Delete the current configuration, and all generated files
940# make distclean Remove editor backup files, patch leftover files and the like
941
942# Directories & files removed with 'make clean'
943CLEAN_DIRS += $(MODVERDIR)
944CLEAN_FILES += vmlinux System.map \
945 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
946
947# Directories & files removed with 'make mrproper'
948MRPROPER_DIRS += include/config include2
Tore Anderson50aa88e2006-01-07 15:34:40 +0100949MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 include/linux/autoconf.h include/linux/version.h \
Sam Ravnborgcb584552006-01-09 21:20:34 +0100951 .kernelrelease Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952
953# clean - Delete most, but leave enough to build external modules
954#
955clean: rm-dirs := $(CLEAN_DIRS)
956clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200957clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958
Paul Smith4f193362006-03-05 17:14:10 -0500959PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960$(clean-dirs):
961 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
962
963clean: archclean $(clean-dirs)
964 $(call cmd,rmdirs)
965 $(call cmd,rmfiles)
966 @find . $(RCS_FIND_IGNORE) \
967 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
968 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
969 -type f -print | xargs rm -f
970
971# mrproper - Delete all generated files, including .config
972#
973mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
974mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
975mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
976
Paul Smith4f193362006-03-05 17:14:10 -0500977PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978$(mrproper-dirs):
979 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
980
981mrproper: clean archmrproper $(mrproper-dirs)
982 $(call cmd,rmdirs)
983 $(call cmd,rmfiles)
984
985# distclean
986#
Paul Smith4f193362006-03-05 17:14:10 -0500987PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988
989distclean: mrproper
990 @find $(srctree) $(RCS_FIND_IGNORE) \
991 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
992 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
993 -o -name '.*.rej' -o -size 0 \
994 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
995 -type f -print | xargs rm -f
996
997
998# Packaging of the kernel to various formats
999# ---------------------------------------------------------------------------
1000# rpm target kept for backward compatibility
1001package-dir := $(srctree)/scripts/package
1002
Paul Smith4f193362006-03-05 17:14:10 -05001003PHONY += %-pkg rpm
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
1005%pkg: FORCE
1006 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1007rpm: FORCE
1008 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1009
1010
1011# Brief documentation of the typical targets used
1012# ---------------------------------------------------------------------------
1013
1014boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1015boards := $(notdir $(boards))
1016
1017help:
1018 @echo 'Cleaning targets:'
1019 @echo ' clean - remove most generated files but keep the config'
1020 @echo ' mrproper - remove all generated files + config + various backup files'
1021 @echo ''
1022 @echo 'Configuration targets:'
1023 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1024 @echo ''
1025 @echo 'Other generic targets:'
1026 @echo ' all - Build all targets marked with [*]'
1027 @echo '* vmlinux - Build the bare kernel'
1028 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001029 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 @echo ' dir/ - Build all files in dir and below'
1031 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001032 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 @echo ' rpm - Build a kernel as an RPM package'
1034 @echo ' tags/TAGS - Generate tags file for editors'
1035 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001036 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001037 @echo ' kernelversion - Output the version stored in Makefile'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 @echo ''
1039 @echo 'Static analysers'
1040 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1041 @echo ' and init sections from non-init sections'
1042 @echo ' checkstack - Generate a list of stack hogs'
1043 @echo ' namespacecheck - Name space analysis on compiled kernel'
1044 @echo ''
1045 @echo 'Kernel packaging:'
1046 @$(MAKE) -f $(package-dir)/Makefile help
1047 @echo ''
1048 @echo 'Documentation targets:'
1049 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1050 @echo ''
1051 @echo 'Architecture specific targets ($(ARCH)):'
1052 @$(if $(archhelp),$(archhelp),\
1053 echo ' No architecture specific help defined for $(ARCH)')
1054 @echo ''
1055 @$(if $(boards), \
1056 $(foreach b, $(boards), \
1057 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1058 echo '')
1059
1060 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1061 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1062 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1063 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1064 @echo ''
1065 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1066 @echo 'For further info see the ./README file'
1067
1068
1069# Documentation targets
1070# ---------------------------------------------------------------------------
1071%docs: scripts_basic FORCE
1072 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1073
1074else # KBUILD_EXTMOD
1075
1076###
1077# External module support.
1078# When building external modules the kernel used as basis is considered
1079# read-only, and no consistency checks are made and the make
1080# system is not used on the basis kernel. If updates are required
1081# in the basis kernel ordinary make commands (without M=...) must
1082# be used.
1083#
1084# The following are the only valid targets when building external
1085# modules.
1086# make M=dir clean Delete all automatically generated files
1087# make M=dir modules Make all modules in specified dir
1088# make M=dir Same as 'make M=dir modules'
1089# make M=dir modules_install
1090# Install the modules build in the module directory
1091# Assumes install directory is already created
1092
1093# We are always building modules
1094KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001095PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096crmodverdir:
Sam Ravnborgfb3cbd22006-01-28 23:08:40 +01001097 $(Q)rm -rf $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 $(Q)mkdir -p $(MODVERDIR)
1099
Paul Smith4f193362006-03-05 17:14:10 -05001100PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101$(objtree)/Module.symvers:
1102 @test -e $(objtree)/Module.symvers || ( \
1103 echo; \
1104 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1105 echo " is missing; modules will have no dependencies and modversions."; \
1106 echo )
1107
1108module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001109PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110$(module-dirs): crmodverdir $(objtree)/Module.symvers
1111 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1112
1113modules: $(module-dirs)
1114 @echo ' Building modules, stage 2.';
1115 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1116
Paul Smith4f193362006-03-05 17:14:10 -05001117PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001118modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001119
Paul Smith4f193362006-03-05 17:14:10 -05001120install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1121PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001122_emodinst_:
1123 $(Q)rm -rf $(MODLIB)/$(install-dir)
1124 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1126
Sam Ravnborga67dc212006-01-28 23:51:57 +01001127# Run depmod only is we have System.map and depmod is executable
1128quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1129 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1130 $(DEPMOD) -ae -F System.map \
1131 $(if $(strip $(INSTALL_MOD_PATH)), \
1132 -b $(INSTALL_MOD_PATH) -r) \
1133 $(KERNELRELEASE); \
1134 fi
1135
Paul Smith4f193362006-03-05 17:14:10 -05001136PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001137_emodinst_post: _emodinst_
1138 $(call cmd,depmod)
1139
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1141
Paul Smith4f193362006-03-05 17:14:10 -05001142PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143$(clean-dirs):
1144 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1145
1146clean: rm-dirs := $(MODVERDIR)
1147clean: $(clean-dirs)
1148 $(call cmd,rmdirs)
1149 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1150 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1151 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1152 -type f -print | xargs rm -f
1153
1154help:
1155 @echo ' Building external modules.'
1156 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1157 @echo ''
1158 @echo ' modules - default target, build the module(s)'
1159 @echo ' modules_install - install the module'
1160 @echo ' clean - remove generated files in module directory only'
1161 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001162
1163# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001164PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001165prepare: ;
1166scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167endif # KBUILD_EXTMOD
1168
1169# Generate tags for editors
1170# ---------------------------------------------------------------------------
1171
1172#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1173#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1174#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1175
George Anzingerf182ae62005-07-07 17:56:06 -07001176ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177__srctree =
1178else
1179__srctree = $(srctree)/
1180endif
1181
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001182ifeq ($(ALLSOURCE_ARCHS),)
1183ifeq ($(ARCH),um)
1184ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1185else
1186ALLINCLUDE_ARCHS := $(ARCH)
1187endif
1188else
1189#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1190ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1191endif
1192
Ian Campbella0674e82005-06-23 11:25:54 +01001193ALLSOURCE_ARCHS := $(ARCH)
1194
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195define all-sources
1196 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1197 \( -name include -o -name arch \) -prune -o \
1198 -name '*.[chS]' -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001199 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1200 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1201 -name '*.[chS]' -print; \
1202 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1204 -name '*.[chS]' -print; \
1205 find $(__srctree)include $(RCS_FIND_IGNORE) \
1206 \( -name config -o -name 'asm-*' \) -prune \
1207 -o -name '*.[chS]' -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001208 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001209 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1210 -name '*.[chS]' -print; \
1211 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1213 -name '*.[chS]' -print )
1214endef
1215
1216quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001217 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218
1219quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001220 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221
1222cscope: FORCE
1223 $(call cmd,cscope-file)
1224 $(call cmd,cscope)
1225
1226quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001227define cmd_TAGS
1228 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001229 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1230 echo "-I __initdata,__exitdata,__acquires,__releases \
1231 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1232 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001233 $(all-sources) | xargs etags $$ETAGSF -a
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001234endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001236TAGS: FORCE
1237 $(call cmd,TAGS)
1238
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239
1240quiet_cmd_tags = MAKE $@
1241define cmd_tags
1242 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001243 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1244 echo "-I __initdata,__exitdata,__acquires,__releases \
1245 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1246 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001247 $(all-sources) | xargs ctags $$CTAGSF -a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248endef
1249
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250tags: FORCE
1251 $(call cmd,tags)
1252
1253
1254# Scripts to check various things for consistency
1255# ---------------------------------------------------------------------------
1256
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257includecheck:
1258 find * $(RCS_FIND_IGNORE) \
1259 -name '*.[hcS]' -type f -print | sort \
1260 | xargs $(PERL) -w scripts/checkincludes.pl
1261
1262versioncheck:
1263 find * $(RCS_FIND_IGNORE) \
1264 -name '*.[hcS]' -type f -print | sort \
1265 | xargs $(PERL) -w scripts/checkversion.pl
1266
1267buildcheck:
1268 $(PERL) $(srctree)/scripts/reference_discarded.pl
1269 $(PERL) $(srctree)/scripts/reference_init.pl
1270
1271namespacecheck:
1272 $(PERL) $(srctree)/scripts/namespace.pl
1273
1274endif #ifeq ($(config-targets),1)
1275endif #ifeq ($(mixed-targets),1)
1276
Paul Smith4f193362006-03-05 17:14:10 -05001277PHONY += checkstack
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278checkstack:
1279 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1280 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1281
1282kernelrelease:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001283 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1284 $(error kernelrelease not valid - run 'make *config' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001285kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001286 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287
Sam Ravnborg06300b22006-01-25 07:13:18 +01001288# Single targets
1289# ---------------------------------------------------------------------------
1290# The directory part is taken from first prerequisite, so this
1291# works even with external modules
Sam Ravnborgf6ecebd2006-03-05 12:10:58 +01001292%.s: %.c prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001293 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
Sam Ravnborgf6ecebd2006-03-05 12:10:58 +01001294%.i: %.c prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001295 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
Sam Ravnborgf6ecebd2006-03-05 12:10:58 +01001296%.o: %.c prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001297 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
Sam Ravnborgf6ecebd2006-03-05 12:10:58 +01001298%.lst: %.c prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001299 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
Sam Ravnborgf6ecebd2006-03-05 12:10:58 +01001300%.s: %.S prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001301 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
Sam Ravnborgf6ecebd2006-03-05 12:10:58 +01001302%.o: %.S prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001303 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@)
1304
1305# For external modules we shall include any directory of the target,
1306# but usual case there is no directory part.
1307# make M=`pwd` module.o => $(dir $@)=./
1308# make M=`pwd` foo/module.o => $(dir $@)=foo/
1309# make M=`pwd` / => $(dir $@)=/
1310
1311ifeq ($(KBUILD_EXTMOD),)
1312 target-dir = $(@D)
1313else
1314 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1315 target-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1316endif
1317
1318/ %/: scripts prepare FORCE
1319 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1320 $(build)=$(target-dir)
1321%.ko: scripts FORCE
1322 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1323 $(build)=$(target-dir) $(@:.ko=.o)
1324 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1325
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326# FIXME Should go into a make.lib or something
1327# ===========================================================================
1328
1329quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1330 cmd_rmdirs = rm -rf $(rm-dirs)
1331
1332quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1333 cmd_rmfiles = rm -f $(rm-files)
1334
1335
1336a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1337 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1338 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1339
1340quiet_cmd_as_o_S = AS $@
1341cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1342
1343# read all saved command lines
1344
1345targets := $(wildcard $(sort $(targets)))
1346cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1347
1348ifneq ($(cmd_files),)
1349 $(cmd_files): ; # Do not try to update included dependency files
1350 include $(cmd_files)
1351endif
1352
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1354# Usage:
1355# $(Q)$(MAKE) $(clean)=dir
1356clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1357
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358endif # skip-makefile
1359
Paul Smith4f193362006-03-05 17:14:10 -05001360PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001362
1363
1364# Declare the contents of the .PHONY variable as phony. We keep that
1365# information in a variable se we can use it in if_changed and friends.
1366.PHONY: $(PHONY)