blob: 131950c02919fa467ec1d95155808292e2dfbece [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds6246b612006-04-02 20:22:10 -07003SUBLEVEL = 17
4EXTRAVERSION =-rc1
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 \
Andi Kleen6edfba12006-03-25 16:29:49 +0100309 -fno-strict-aliasing -fno-common
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310AFLAGS := -D__ASSEMBLY__
311
Sam Ravnborgcb584552006-01-09 21:20:34 +0100312# Read KERNELRELEASE from .kernelrelease (if it exists)
313KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100314KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100315
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100316export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
318 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
319 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
320
321export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
322export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
323export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
324
325# When compiling out-of-tree modules, put MODVERDIR in the module
326# tree rather than in the kernel tree. The kernel tree might
327# even be read-only.
328export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330# Files to ignore in find ... statements
331
Trond Myklebust406119f2005-10-27 14:46:53 -0400332RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
333export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
335# ===========================================================================
336# Rules shared between *config targets and build targets
337
338# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500339PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340scripts_basic:
341 $(Q)$(MAKE) $(build)=scripts/basic
342
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200343# To avoid any implicit rule to kick in, define an empty command.
344scripts/basic/%: scripts_basic ;
345
Paul Smith4f193362006-03-05 17:14:10 -0500346PHONY += outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347# outputmakefile generate a Makefile to be placed in output directory, if
348# using a seperate output directory. This allows convinient use
349# of make in output directory
350outputmakefile:
351 $(Q)if test ! $(srctree) -ef $(objtree); then \
352 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
353 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
354 > $(objtree)/Makefile; \
355 echo ' GEN $(objtree)/Makefile'; \
356 fi
357
358# To make sure we do not include .config for any of the *config targets
359# catch them early, and hand them over to scripts/kconfig/Makefile
360# It is allowed to specify more targets when calling make, including
361# mixing *config targets and build targets.
362# For example 'make oldconfig all'.
363# Detect when mixed targets is specified, and make a second invocation
364# of make so .config is not included in this case either (for *config).
365
366no-dot-config-targets := clean mrproper distclean \
Andreas Schwab6b6a4622005-12-12 00:37:03 -0800367 cscope TAGS tags help %docs check%
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
369config-targets := 0
370mixed-targets := 0
371dot-config := 1
372
373ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
374 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
375 dot-config := 0
376 endif
377endif
378
379ifeq ($(KBUILD_EXTMOD),)
380 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
381 config-targets := 1
382 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
383 mixed-targets := 1
384 endif
385 endif
386endif
387
388ifeq ($(mixed-targets),1)
389# ===========================================================================
390# We're called with mixed targets (*config and build targets).
391# Handle them one by one.
392
393%:: FORCE
394 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
395
396else
397ifeq ($(config-targets),1)
398# ===========================================================================
399# *config targets only - make sure prerequisites are updated, and descend
400# in scripts/kconfig to make the *config target
401
402# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
403# KBUILD_DEFCONFIG may point out an alternative default configuration
404# used for 'make defconfig'
405include $(srctree)/arch/$(ARCH)/Makefile
406export KBUILD_DEFCONFIG
407
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200408config %config: scripts_basic outputmakefile FORCE
409 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 $(Q)$(MAKE) $(build)=scripts/kconfig $@
Sam Ravnborg8c7f75d2006-01-21 12:07:56 +0100411 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
413else
414# ===========================================================================
415# Build targets only - this includes vmlinux, arch specific targets, clean
416# targets and others. In general all targets except *config targets.
417
418ifeq ($(KBUILD_EXTMOD),)
419# Additional helpers built in scripts/
420# Carefully list dependencies so we do not try to build scripts twice
421# in parrallel
Paul Smith4f193362006-03-05 17:14:10 -0500422PHONY += scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423scripts: scripts_basic include/config/MARKER
424 $(Q)$(MAKE) $(build)=$(@)
425
426scripts_basic: include/linux/autoconf.h
427
428# Objects we will link into vmlinux / subdirs we need to visit
429init-y := init/
430drivers-y := drivers/ sound/
431net-y := net/
432libs-y := lib/
433core-y := usr/
434endif # KBUILD_EXTMOD
435
436ifeq ($(dot-config),1)
437# In this section, we need .config
438
439# Read in dependencies to all Kconfig* files, make sure to run
440# oldconfig if changes are detected.
Sam Ravnborg752625c2005-12-26 23:34:03 +0100441-include .kconfig.d
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
443include .config
444
445# If .config needs to be updated, it will be done via the dependency
446# that autoconf has on .config.
447# To avoid any implicit rule to kick in, define an empty command
Sam Ravnborg752625c2005-12-26 23:34:03 +0100448.config .kconfig.d: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
450# If .config is newer than include/linux/autoconf.h, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100451# with it and forgot to run make oldconfig.
452# If kconfig.d is missing then we are probarly in a cleaned tree so
453# we execute the config step to be sure to catch updated Kconfig files
454include/linux/autoconf.h: .kconfig.d .config
Sam Ravnborg5011cdd2005-09-11 22:32:57 +0200455 $(Q)mkdir -p include/linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
457else
458# Dummy target needed, because used as prerequisite
459include/linux/autoconf.h: ;
460endif
461
462# The all: target is the default when no target is given on the
463# command line.
464# This allow a user to issue only 'make' to build a kernel including modules
465# Defaults vmlinux but it is usually overriden in the arch makefile
466all: vmlinux
467
468ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
469CFLAGS += -Os
470else
471CFLAGS += -O2
472endif
473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700475CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476else
477CFLAGS += -fomit-frame-pointer
478endif
479
Jan Beulich604bf5a2006-03-24 03:16:19 -0800480ifdef CONFIG_UNWIND_INFO
481CFLAGS += -fasynchronous-unwind-tables
482endif
483
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484ifdef CONFIG_DEBUG_INFO
485CFLAGS += -g
486endif
487
488include $(srctree)/arch/$(ARCH)/Makefile
489
Sam Ravnborge8e69932005-04-30 16:51:42 -0700490# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700491NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700492CHECKFLAGS += $(NOSTDINC_FLAGS)
493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494# warn about C99 declaration after statement
495CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
496
497# disable pointer signedness warnings in gcc 4.0
498CFLAGS += $(call cc-option,-Wno-pointer-sign,)
499
500# Default kernel image to build when no specific target is given.
501# KBUILD_IMAGE may be overruled on the commandline or
502# set in the environment
503# Also any assignments in arch/$(ARCH)/Makefile take precedence over
504# this default value
505export KBUILD_IMAGE ?= vmlinux
506
507#
508# INSTALL_PATH specifies where to place the updated kernel and system map
509# images. Default is /boot, but you can set it to other values
510export INSTALL_PATH ?= /boot
511
512#
513# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
514# relocations required by build roots. This is not defined in the
515# makefile but the arguement can be passed to make if needed.
516#
517
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100518MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519export MODLIB
520
521
522ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100523core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
525vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
526 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
527 $(net-y) $(net-m) $(libs-y) $(libs-m)))
528
529vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
530 $(init-n) $(init-) \
531 $(core-n) $(core-) $(drivers-n) $(drivers-) \
532 $(net-n) $(net-) $(libs-n) $(libs-))))
533
534init-y := $(patsubst %/, %/built-in.o, $(init-y))
535core-y := $(patsubst %/, %/built-in.o, $(core-y))
536drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
537net-y := $(patsubst %/, %/built-in.o, $(net-y))
538libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
539libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
540libs-y := $(libs-y1) $(libs-y2)
541
542# Build vmlinux
543# ---------------------------------------------------------------------------
544# vmlinux is build from the objects selected by $(vmlinux-init) and
545# $(vmlinux-main). Most are built-in.o files from top-level directories
546# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
547# Ordering when linking is important, and $(vmlinux-init) must be first.
548#
549# vmlinux
550# ^
551# |
552# +-< $(vmlinux-init)
553# | +--< init/version.o + more
554# |
555# +--< $(vmlinux-main)
556# | +--< driver/built-in.o mm/built-in.o + more
557# |
558# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
559#
560# vmlinux version (uname -v) cannot be updated during normal
561# descending-into-subdirs phase since we do not yet know if we need to
562# update vmlinux.
563# Therefore this step is delayed until just before final link of vmlinux -
564# except in the kallsyms case where it is done just before adding the
565# symbols to the kernel.
566#
567# System.map is generated to document addresses of all kernel symbols
568
569vmlinux-init := $(head-y) $(init-y)
570vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
571vmlinux-all := $(vmlinux-init) $(vmlinux-main)
572vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
573
574# Rule to link vmlinux - also used during CONFIG_KALLSYMS
575# May be overridden by arch/$(ARCH)/Makefile
576quiet_cmd_vmlinux__ ?= LD $@
577 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
578 -T $(vmlinux-lds) $(vmlinux-init) \
579 --start-group $(vmlinux-main) --end-group \
580 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
581
582# Generate new vmlinux version
583quiet_cmd_vmlinux_version = GEN .version
584 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200585 if [ ! -r .version ]; then \
586 rm -f .version; \
587 echo 1 >.version; \
588 else \
589 mv .version .old_version; \
590 expr 0$$(cat .old_version) + 1 >.version; \
591 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 $(MAKE) $(build)=init
593
594# Generate System.map
595quiet_cmd_sysmap = SYSMAP
596 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
597
598# Link of vmlinux
599# If CONFIG_KALLSYMS is set .version is already updated
600# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700601# Use + in front of the vmlinux_version rule to silent warning with make -j2
602# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700604 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
606
607 $(call cmd,vmlinux__)
608 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
609
610 $(Q)$(if $($(quiet)cmd_sysmap), \
611 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
612 $(cmd_sysmap) $@ System.map; \
613 if [ $$? -ne 0 ]; then \
614 rm -f $@; \
615 /bin/false; \
616 fi;
617 $(verify_kallsyms)
618endef
619
620
621ifdef CONFIG_KALLSYMS
622# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
623# It's a three stage process:
624# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
625# empty
626# Running kallsyms on that gives us .tmp_kallsyms1.o with
627# the right size - vmlinux version (uname -v) is updated during this step
628# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
629# but due to the added section, some addresses have shifted.
630# From here, we generate a correct .tmp_kallsyms2.o
631# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
632# o Verify that the System.map from vmlinux matches the map from
633# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
634# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
635# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
636# temporary bypass to allow the kernel to be built while the
637# maintainers work out what went wrong with kallsyms.
638
639ifdef CONFIG_KALLSYMS_EXTRA_PASS
640last_kallsyms := 3
641else
642last_kallsyms := 2
643endif
644
645kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
646
647define verify_kallsyms
648 $(Q)$(if $($(quiet)cmd_sysmap), \
649 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
650 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
651 $(Q)cmp -s System.map .tmp_System.map || \
652 (echo Inconsistent kallsyms data; \
653 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
654 rm .tmp_kallsyms* ; /bin/false )
655endef
656
657# Update vmlinux version before link
658# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200659# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660cmd_ksym_ld = $(cmd_vmlinux__)
661define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200662 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 +$(call cmd,vmlinux_version)
664 $(call cmd,vmlinux__)
665 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
666endef
667
668# Generate .S file with all kernel symbols
669quiet_cmd_kallsyms = KSYM $@
670 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
671 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
672
673.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
674 $(call if_changed_dep,as_o_S)
675
676.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
677 $(call cmd,kallsyms)
678
679# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
680.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
681 $(call if_changed_rule,ksym_ld)
682
683.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
684 $(call if_changed,vmlinux__)
685
686.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
687 $(call if_changed,vmlinux__)
688
689# Needs to visit scripts/ before $(KALLSYMS) can be used.
690$(KALLSYMS): scripts ;
691
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000692# Generate some data for debugging strange kallsyms problems
693debug_kallsyms: .tmp_map$(last_kallsyms)
694
695.tmp_map%: .tmp_vmlinux% FORCE
696 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
697
698.tmp_map3: .tmp_map2
699
700.tmp_map2: .tmp_map1
701
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702endif # ifdef CONFIG_KALLSYMS
703
704# vmlinux image - including updated kernel symbols
705vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
706 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200707 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708
709# The actual objects are generated when descending,
710# make sure no implicit rule kicks in
711$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
712
713# Handle descending into subdirectories listed in $(vmlinux-dirs)
714# Preset locale variables to speed up the build process. Limit locale
715# tweaks to this spot to avoid wrong language settings when running
716# make menuconfig etc.
717# Error messages still appears in the original language
718
Paul Smith4f193362006-03-05 17:14:10 -0500719PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200720$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 $(Q)$(MAKE) $(build)=$@
722
Sam Ravnborgcb584552006-01-09 21:20:34 +0100723# Build the kernel release string
724# The KERNELRELEASE is stored in a file named .kernelrelease
725# to be used when executing for example make install or make modules_install
726#
727# Take the contents of any files called localversion* and the config
728# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
729# LOCALVERSION from the command line override all of this
730
731nullstring :=
732space := $(nullstring) # end of line
733
734___localver = $(objtree)/localversion* $(srctree)/localversion*
735__localver = $(sort $(wildcard $(___localver)))
736# skip backup files (containing '~')
737_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
738
739localver = $(subst $(space),, \
740 $(shell cat /dev/null $(_localver)) \
741 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
742
743# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
744# and if the SCM is know a tag from the SCM is appended.
745# The appended tag is determinded by the SCM used.
746#
747# Currently, only git is supported.
748# Other SCMs can edit scripts/setlocalversion and add the appropriate
749# checks as needed.
750ifdef CONFIG_LOCALVERSION_AUTO
751 _localver-auto = $(shell $(CONFIG_SHELL) \
752 $(srctree)/scripts/setlocalversion $(srctree))
753 localver-auto = $(LOCALVERSION)$(_localver-auto)
754endif
755
756localver-full = $(localver)$(localver-auto)
757
758# Store (new) KERNELRELASE string in .kernelrelease
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100759kernelrelease = $(KERNELVERSION)$(localver-full)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100760.kernelrelease: FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100761 $(Q)rm -f $@
762 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100763
764
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200766# or the modules are listed in "prepare".
767# A multi level approach is used. prepareN is processed before prepareN-1.
768# archprepare is used in arch Makefiles and when processed asm symlink,
769# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200771# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500772PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200773
774# prepare-all is deprecated, use prepare as valid replacement
Paul Smith4f193362006-03-05 17:14:10 -0500775PHONY += prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200777# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778# and if so do:
779# 1) Check that make has not been executed in the kernel src $(srctree)
780# 2) Create the include2 directory, used for the second asm symlink
Sam Ravnborgcb584552006-01-09 21:20:34 +0100781prepare3: .kernelrelease
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782ifneq ($(KBUILD_SRC),)
783 @echo ' Using $(srctree) as source for kernel'
Sam Ravnborgd80e22462005-07-14 20:22:39 +0000784 $(Q)if [ -f $(srctree)/.config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 echo " $(srctree) is not clean, please run 'make mrproper'";\
786 echo " in the '$(srctree)' directory.";\
787 /bin/false; \
788 fi;
789 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
790 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
791endif
792
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200793# prepare2 creates a makefile if using a separate output directory
794prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200796prepare1: prepare2 include/linux/version.h include/asm \
Sam Ravnborgd80e22462005-07-14 20:22:39 +0000797 include/config/MARKER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798ifneq ($(KBUILD_MODULES),)
799 $(Q)rm -rf $(MODVERDIR)
800 $(Q)mkdir -p $(MODVERDIR)
801endif
802
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200803archprepare: prepare1 scripts_basic
804
805prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200806 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200807
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200809prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
811# Leave this as default for preprocessing vmlinux.lds.S, which is now
812# done in arch/$(ARCH)/kernel/Makefile
813
814export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
815
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816# FIXME: The asm symlink changes when $(ARCH) changes. That's
817# hard to detect, but I suppose "make mrproper" is a good idea
818# before switching between archs anyway.
819
820include/asm:
821 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
822 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
823 @ln -fsn asm-$(ARCH) $@
824
825# Split autoconf.h into include/linux/config/*
826
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200827include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
829 @scripts/basic/split-include include/linux/autoconf.h include/config
830 @touch $@
831
832# Generate some files
833# ---------------------------------------------------------------------------
834
835# KERNELRELEASE can change from a few different places, meaning version.h
836# needs to be updated, so this check is forced on all builds
837
838uts_len := 64
839
840define filechk_version.h
841 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
842 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
843 exit 1; \
844 fi; \
845 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
846 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
847 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
848 )
849endef
850
Jan Beulich44f329a2006-02-22 13:29:04 +0100851include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 $(call filechk,version.h)
853
854# ---------------------------------------------------------------------------
855
Paul Smith4f193362006-03-05 17:14:10 -0500856PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857depend dep:
858 @echo '*** Warning: make $@ is unnecessary now.'
859
860# ---------------------------------------------------------------------------
861# Modules
862
863ifdef CONFIG_MODULES
864
865# By default, build modules as well
866
867all: modules
868
869# Build modules
870
Paul Smith4f193362006-03-05 17:14:10 -0500871PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
873 @echo ' Building modules, stage 2.';
874 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
875
876
877# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500878PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200879modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
881# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500882PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883modules_install: _modinst_ _modinst_post
884
Paul Smith4f193362006-03-05 17:14:10 -0500885PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700887 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 echo "Warning: you may need to install module-init-tools"; \
889 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
890 sleep 1; \
891 fi
892 @rm -rf $(MODLIB)/kernel
893 @rm -f $(MODLIB)/source
894 @mkdir -p $(MODLIB)/kernel
895 @ln -s $(srctree) $(MODLIB)/source
896 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
897 rm -f $(MODLIB)/build ; \
898 ln -s $(objtree) $(MODLIB)/build ; \
899 fi
900 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
901
902# If System.map exists, run depmod. This deliberately does not have a
903# dependency on System.map since that would run the dependency tree on
904# vmlinux. This depmod is only for convenience to give the initial
905# boot a modules.dep even before / is mounted read-write. However the
906# boot script depmod is the master version.
907ifeq "$(strip $(INSTALL_MOD_PATH))" ""
908depmod_opts :=
909else
910depmod_opts := -b $(INSTALL_MOD_PATH) -r
911endif
Paul Smith4f193362006-03-05 17:14:10 -0500912PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913_modinst_post: _modinst_
914 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
915
916else # CONFIG_MODULES
917
918# Modules not configured
919# ---------------------------------------------------------------------------
920
921modules modules_install: FORCE
922 @echo
923 @echo "The present kernel configuration has modules disabled."
924 @echo "Type 'make config' and enable loadable module support."
925 @echo "Then build a kernel with module support enabled."
926 @echo
927 @exit 1
928
929endif # CONFIG_MODULES
930
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931###
932# Cleaning is done on three levels.
933# make clean Delete most generated files
934# Leave enough to build external modules
935# make mrproper Delete the current configuration, and all generated files
936# make distclean Remove editor backup files, patch leftover files and the like
937
938# Directories & files removed with 'make clean'
939CLEAN_DIRS += $(MODVERDIR)
940CLEAN_FILES += vmlinux System.map \
941 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
942
943# Directories & files removed with 'make mrproper'
944MRPROPER_DIRS += include/config include2
Tore Anderson50aa88e2006-01-07 15:34:40 +0100945MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 include/linux/autoconf.h include/linux/version.h \
Sam Ravnborgcb584552006-01-09 21:20:34 +0100947 .kernelrelease Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948
949# clean - Delete most, but leave enough to build external modules
950#
951clean: rm-dirs := $(CLEAN_DIRS)
952clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200953clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954
Paul Smith4f193362006-03-05 17:14:10 -0500955PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956$(clean-dirs):
957 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
958
959clean: archclean $(clean-dirs)
960 $(call cmd,rmdirs)
961 $(call cmd,rmfiles)
962 @find . $(RCS_FIND_IGNORE) \
963 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
964 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
965 -type f -print | xargs rm -f
966
967# mrproper - Delete all generated files, including .config
968#
969mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
970mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
971mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
972
Paul Smith4f193362006-03-05 17:14:10 -0500973PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974$(mrproper-dirs):
975 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
976
977mrproper: clean archmrproper $(mrproper-dirs)
978 $(call cmd,rmdirs)
979 $(call cmd,rmfiles)
980
981# distclean
982#
Paul Smith4f193362006-03-05 17:14:10 -0500983PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984
985distclean: mrproper
986 @find $(srctree) $(RCS_FIND_IGNORE) \
987 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
988 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
989 -o -name '.*.rej' -o -size 0 \
990 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
991 -type f -print | xargs rm -f
992
993
994# Packaging of the kernel to various formats
995# ---------------------------------------------------------------------------
996# rpm target kept for backward compatibility
997package-dir := $(srctree)/scripts/package
998
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999%pkg: FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001000 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001rpm: FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001002 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003
1004
1005# Brief documentation of the typical targets used
1006# ---------------------------------------------------------------------------
1007
1008boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1009boards := $(notdir $(boards))
1010
1011help:
1012 @echo 'Cleaning targets:'
1013 @echo ' clean - remove most generated files but keep the config'
1014 @echo ' mrproper - remove all generated files + config + various backup files'
1015 @echo ''
1016 @echo 'Configuration targets:'
1017 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1018 @echo ''
1019 @echo 'Other generic targets:'
1020 @echo ' all - Build all targets marked with [*]'
1021 @echo '* vmlinux - Build the bare kernel'
1022 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001023 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 @echo ' dir/ - Build all files in dir and below'
1025 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001026 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 @echo ' rpm - Build a kernel as an RPM package'
1028 @echo ' tags/TAGS - Generate tags file for editors'
1029 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001030 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001031 @echo ' kernelversion - Output the version stored in Makefile'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 @echo ''
1033 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 @echo ' checkstack - Generate a list of stack hogs'
1035 @echo ' namespacecheck - Name space analysis on compiled kernel'
1036 @echo ''
1037 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001038 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 @echo ''
1040 @echo 'Documentation targets:'
1041 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1042 @echo ''
1043 @echo 'Architecture specific targets ($(ARCH)):'
1044 @$(if $(archhelp),$(archhelp),\
1045 echo ' No architecture specific help defined for $(ARCH)')
1046 @echo ''
1047 @$(if $(boards), \
1048 $(foreach b, $(boards), \
1049 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1050 echo '')
1051
1052 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1053 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1054 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1055 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1056 @echo ''
1057 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1058 @echo 'For further info see the ./README file'
1059
1060
1061# Documentation targets
1062# ---------------------------------------------------------------------------
1063%docs: scripts_basic FORCE
1064 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1065
1066else # KBUILD_EXTMOD
1067
1068###
1069# External module support.
1070# When building external modules the kernel used as basis is considered
1071# read-only, and no consistency checks are made and the make
1072# system is not used on the basis kernel. If updates are required
1073# in the basis kernel ordinary make commands (without M=...) must
1074# be used.
1075#
1076# The following are the only valid targets when building external
1077# modules.
1078# make M=dir clean Delete all automatically generated files
1079# make M=dir modules Make all modules in specified dir
1080# make M=dir Same as 'make M=dir modules'
1081# make M=dir modules_install
1082# Install the modules build in the module directory
1083# Assumes install directory is already created
1084
1085# We are always building modules
1086KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001087PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088crmodverdir:
Sam Ravnborgfb3cbd22006-01-28 23:08:40 +01001089 $(Q)rm -rf $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 $(Q)mkdir -p $(MODVERDIR)
1091
Paul Smith4f193362006-03-05 17:14:10 -05001092PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093$(objtree)/Module.symvers:
1094 @test -e $(objtree)/Module.symvers || ( \
1095 echo; \
1096 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1097 echo " is missing; modules will have no dependencies and modversions."; \
1098 echo )
1099
1100module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001101PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102$(module-dirs): crmodverdir $(objtree)/Module.symvers
1103 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1104
1105modules: $(module-dirs)
1106 @echo ' Building modules, stage 2.';
1107 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1108
Paul Smith4f193362006-03-05 17:14:10 -05001109PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001110modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001111
Paul Smith4f193362006-03-05 17:14:10 -05001112install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1113PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001114_emodinst_:
1115 $(Q)rm -rf $(MODLIB)/$(install-dir)
1116 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1118
Sam Ravnborga67dc212006-01-28 23:51:57 +01001119# Run depmod only is we have System.map and depmod is executable
1120quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1121 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1122 $(DEPMOD) -ae -F System.map \
1123 $(if $(strip $(INSTALL_MOD_PATH)), \
1124 -b $(INSTALL_MOD_PATH) -r) \
1125 $(KERNELRELEASE); \
1126 fi
1127
Paul Smith4f193362006-03-05 17:14:10 -05001128PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001129_emodinst_post: _emodinst_
1130 $(call cmd,depmod)
1131
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1133
Paul Smith4f193362006-03-05 17:14:10 -05001134PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135$(clean-dirs):
1136 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1137
1138clean: rm-dirs := $(MODVERDIR)
1139clean: $(clean-dirs)
1140 $(call cmd,rmdirs)
1141 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1142 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1143 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1144 -type f -print | xargs rm -f
1145
1146help:
1147 @echo ' Building external modules.'
1148 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1149 @echo ''
1150 @echo ' modules - default target, build the module(s)'
1151 @echo ' modules_install - install the module'
1152 @echo ' clean - remove generated files in module directory only'
1153 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001154
1155# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001156PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001157prepare: ;
1158scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159endif # KBUILD_EXTMOD
1160
1161# Generate tags for editors
1162# ---------------------------------------------------------------------------
1163
1164#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1165#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1166#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1167
George Anzingerf182ae62005-07-07 17:56:06 -07001168ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169__srctree =
1170else
1171__srctree = $(srctree)/
1172endif
1173
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001174ifeq ($(ALLSOURCE_ARCHS),)
1175ifeq ($(ARCH),um)
1176ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1177else
1178ALLINCLUDE_ARCHS := $(ARCH)
1179endif
1180else
1181#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1182ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1183endif
1184
Ian Campbella0674e82005-06-23 11:25:54 +01001185ALLSOURCE_ARCHS := $(ARCH)
1186
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187define all-sources
1188 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1189 \( -name include -o -name arch \) -prune -o \
1190 -name '*.[chS]' -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001191 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1192 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1193 -name '*.[chS]' -print; \
1194 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1196 -name '*.[chS]' -print; \
1197 find $(__srctree)include $(RCS_FIND_IGNORE) \
1198 \( -name config -o -name 'asm-*' \) -prune \
1199 -o -name '*.[chS]' -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001200 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001201 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1202 -name '*.[chS]' -print; \
1203 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1205 -name '*.[chS]' -print )
1206endef
1207
1208quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001209 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
1211quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001212 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
1214cscope: FORCE
1215 $(call cmd,cscope-file)
1216 $(call cmd,cscope)
1217
1218quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001219define cmd_TAGS
1220 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001221 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1222 echo "-I __initdata,__exitdata,__acquires,__releases \
1223 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1224 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001225 $(all-sources) | xargs etags $$ETAGSF -a
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001226endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001228TAGS: FORCE
1229 $(call cmd,TAGS)
1230
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231
1232quiet_cmd_tags = MAKE $@
1233define cmd_tags
1234 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001235 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1236 echo "-I __initdata,__exitdata,__acquires,__releases \
1237 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1238 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001239 $(all-sources) | xargs ctags $$CTAGSF -a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240endef
1241
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242tags: FORCE
1243 $(call cmd,tags)
1244
1245
1246# Scripts to check various things for consistency
1247# ---------------------------------------------------------------------------
1248
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249includecheck:
1250 find * $(RCS_FIND_IGNORE) \
1251 -name '*.[hcS]' -type f -print | sort \
1252 | xargs $(PERL) -w scripts/checkincludes.pl
1253
1254versioncheck:
1255 find * $(RCS_FIND_IGNORE) \
1256 -name '*.[hcS]' -type f -print | sort \
1257 | xargs $(PERL) -w scripts/checkversion.pl
1258
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259namespacecheck:
1260 $(PERL) $(srctree)/scripts/namespace.pl
1261
1262endif #ifeq ($(config-targets),1)
1263endif #ifeq ($(mixed-targets),1)
1264
Paul Smith4f193362006-03-05 17:14:10 -05001265PHONY += checkstack
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266checkstack:
1267 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1268 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1269
1270kernelrelease:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001271 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \
1272 $(error kernelrelease not valid - run 'make *config' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001273kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001274 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275
Sam Ravnborg06300b22006-01-25 07:13:18 +01001276# Single targets
1277# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001278# Single targets are compatible with:
1279# - build whith mixed source and output
1280# - build with separate output dir 'make O=...'
1281# - external modules
1282#
1283# target-dir => where to store outputfile
1284# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001285
Sam Ravnborg06300b22006-01-25 07:13:18 +01001286ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001287 build-dir = $(dir $@)
1288 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001289else
1290 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001291 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1292 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001293endif
1294
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001295%.s: %.c prepare scripts FORCE
1296 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1297%.i: %.c prepare scripts FORCE
1298 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1299%.o: %.c prepare scripts FORCE
1300 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1301%.lst: %.c prepare scripts FORCE
1302 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1303%.s: %.S prepare scripts FORCE
1304 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1305%.o: %.S prepare scripts FORCE
1306 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1307
1308# Modules
1309/ %/: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001310 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001311 $(build)=$(build-dir)
1312%.ko: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001313 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001314 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001315 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1316
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317# FIXME Should go into a make.lib or something
1318# ===========================================================================
1319
1320quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1321 cmd_rmdirs = rm -rf $(rm-dirs)
1322
1323quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1324 cmd_rmfiles = rm -f $(rm-files)
1325
1326
1327a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1328 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1329 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1330
1331quiet_cmd_as_o_S = AS $@
1332cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1333
1334# read all saved command lines
1335
1336targets := $(wildcard $(sort $(targets)))
1337cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1338
1339ifneq ($(cmd_files),)
1340 $(cmd_files): ; # Do not try to update included dependency files
1341 include $(cmd_files)
1342endif
1343
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1345# Usage:
1346# $(Q)$(MAKE) $(clean)=dir
1347clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1348
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349endif # skip-makefile
1350
Paul Smith4f193362006-03-05 17:14:10 -05001351PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001353
1354
1355# Declare the contents of the .PHONY variable as phony. We keep that
1356# information in a variable se we can use it in if_changed and friends.
1357.PHONY: $(PHONY)