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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds120bda22006-07-05 21:09:49 -07003SUBLEVEL = 18
Linus Torvalds82d68972006-07-15 14:53:08 -07004EXTRAVERSION = -rc2
Linus Torvalds1def6302006-06-05 17:57:02 -07005NAME=Crazed Snow-Weasel
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 = $(V)
38 endif
39endif
40ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42endif
43
Dustin Kirkland701842e2006-05-23 15:57:23 -050044# Call checker as part of compilation of C files
45# Use 'make C=1' to enable checking (sparse, by default)
46# Override with 'make C=1 CHECK=checker_executable CHECKFLAGS=....'
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48ifdef C
49 ifeq ("$(origin C)", "command line")
50 KBUILD_CHECKSRC = $(C)
51 endif
52endif
53ifndef KBUILD_CHECKSRC
54 KBUILD_CHECKSRC = 0
55endif
56
57# Use make M=dir to specify directory of external module to build
58# Old syntax make ... SUBDIRS=$PWD is still supported
59# Setting the environment variable KBUILD_EXTMOD take precedence
60ifdef SUBDIRS
61 KBUILD_EXTMOD ?= $(SUBDIRS)
62endif
63ifdef M
64 ifeq ("$(origin M)", "command line")
65 KBUILD_EXTMOD := $(M)
66 endif
67endif
68
69
70# kbuild supports saving output files in a separate directory.
71# To locate output files in a separate directory two syntaxes are supported.
72# In both cases the working directory must be the root of the kernel src.
73# 1) O=
74# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020075#
Linus Torvalds1da177e2005-04-16 15:20:36 -070076# 2) Set KBUILD_OUTPUT
77# Set the environment variable KBUILD_OUTPUT to point to the directory
78# where the output files shall be placed.
79# export KBUILD_OUTPUT=dir/to/store/output/files/
80# make
81#
82# The O= assignment takes precedence over the KBUILD_OUTPUT environment
83# variable.
84
85
86# KBUILD_SRC is set on invocation of make in OBJ directory
87# KBUILD_SRC is not intended to be used by the regular user (for now)
88ifeq ($(KBUILD_SRC),)
89
90# OK, Make called in directory where kernel src resides
91# Do we want to locate output files in a separate directory?
92ifdef O
93 ifeq ("$(origin O)", "command line")
94 KBUILD_OUTPUT := $(O)
95 endif
96endif
97
98# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -050099PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100_all:
101
102ifneq ($(KBUILD_OUTPUT),)
103# Invoke a second make in the output directory, passing relevant variables
104# check that the output directory actually exists
105saved-output := $(KBUILD_OUTPUT)
106KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
107$(if $(KBUILD_OUTPUT),, \
108 $(error output directory "$(saved-output)" does not exist))
109
Paul Smith4f193362006-03-05 17:14:10 -0500110PHONY += $(MAKECMDGOALS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800112$(filter-out _all,$(MAKECMDGOALS)) _all:
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200113 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
114 KBUILD_SRC=$(CURDIR) \
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800115 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116
117# Leave processing to above invocation of make
118skip-makefile := 1
119endif # ifneq ($(KBUILD_OUTPUT),)
120endif # ifeq ($(KBUILD_SRC),)
121
122# We process the rest of the Makefile if this is the final invocation of make
123ifeq ($(skip-makefile),)
124
125# If building an external module we do not care about the all: rule
126# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500127PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128ifeq ($(KBUILD_EXTMOD),)
129_all: all
130else
131_all: modules
132endif
133
134srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
135TOPDIR := $(srctree)
136# FIXME - TOPDIR is obsolete, use srctree/objtree
137objtree := $(CURDIR)
138src := $(srctree)
139obj := $(objtree)
140
Mattia Dongili0f558c32006-02-19 13:50:37 +0100141VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
143export srctree objtree VPATH TOPDIR
144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146# SUBARCH tells the usermode build what the underlying arch is. That is set
147# first, and if a usermode build is happening, the "ARCH=um" on the command
148# line overrides the setting of ARCH below. If a native build is happening,
149# then ARCH is assigned, getting whatever value it gets normally, and
150# SUBARCH is subsequently ignored.
151
152SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
153 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800154 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Martin Michlmayr89992572006-01-28 18:38:15 +0000155 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157# Cross compiling and selecting different set of gcc/bin-utils
158# ---------------------------------------------------------------------------
159#
160# When performing cross compilation for other architectures ARCH shall be set
161# to the target architecture. (See arch/* for the possibilities).
162# ARCH can be set during invocation of make:
163# make ARCH=ia64
164# Another way is to have ARCH set in the environment.
165# The default ARCH is the host where make is executed.
166
167# CROSS_COMPILE specify the prefix used for all executables used
168# during compilation. Only gcc and related bin-utils executables
169# are prefixed with $(CROSS_COMPILE).
170# CROSS_COMPILE can be set on the command line
171# make CROSS_COMPILE=ia64-linux-
172# Alternatively CROSS_COMPILE can be set in the environment.
173# Default value for CROSS_COMPILE is not to prefix executables
174# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
175
176ARCH ?= $(SUBARCH)
177CROSS_COMPILE ?=
178
179# Architecture as present in compile.h
180UTS_MACHINE := $(ARCH)
181
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700182KCONFIG_CONFIG ?= .config
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184# SHELL used by kbuild
185CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
186 else if [ -x /bin/bash ]; then echo /bin/bash; \
187 else echo sh; fi ; fi)
188
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200189HOSTCC = gcc
190HOSTCXX = g++
191HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
192HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200194# Decide whether to build built-in, modular, or both.
195# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196
197KBUILD_MODULES :=
198KBUILD_BUILTIN := 1
199
200# If we have only "make modules", don't compile built-in objects.
201# When we're building modules with modversions, we need to consider
202# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200203# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205ifeq ($(MAKECMDGOALS),modules)
206 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
207endif
208
209# If we have "make <whatever> modules", compile modules
210# in addition to whatever we do anyway.
211# Just "make" or "make all" shall build modules as well
212
213ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
214 KBUILD_MODULES := 1
215endif
216
217ifeq ($(MAKECMDGOALS),)
218 KBUILD_MODULES := 1
219endif
220
Sam Ravnborge579d352005-07-27 08:10:10 +0200221export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
223
224# Beautify output
225# ---------------------------------------------------------------------------
226#
227# Normally, we echo the whole command before executing it. By making
228# that echo $($(quiet)$(cmd)), we now have the possibility to set
229# $(quiet) to choose other forms of output instead, e.g.
230#
231# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
232# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
233#
234# If $(quiet) is empty, the whole command will be printed.
235# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200236# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237# the variable $(silent_cmd_cc_o_c) doesn't exist.
238#
Adrian Bunka58a4142006-01-10 00:08:17 +0100239# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240# for commands that shall be hidden in non-verbose mode.
241#
242# $(Q)ln $@ :<
243#
244# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
245# If KBUILD_VERBOSE equals 1 then the above command is displayed.
246
247ifeq ($(KBUILD_VERBOSE),1)
248 quiet =
249 Q =
250else
251 quiet=quiet_
252 Q = @
253endif
254
255# If the user is running make -s (silent mode), suppress echoing of
256# commands
257
258ifneq ($(findstring s,$(MAKEFLAGS)),)
259 quiet=silent_
260endif
261
262export quiet Q KBUILD_VERBOSE
263
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
265# Look for make include files relative to root of kernel src
266MAKEFLAGS += --include-dir=$(srctree)
267
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000268# We need some generic definitions
Sam Ravnborg2a691472005-07-25 20:26:04 +0000269include $(srctree)/scripts/Kbuild.include
Sam Ravnborg8ec4b4f2005-07-25 20:10:36 +0000270
Sam Ravnborg566f81c2006-06-10 09:15:27 +0200271# Do not use make's built-in rules and variables
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200272# This increases performance and avoid hard-to-debug behavour
Sam Ravnborg566f81c2006-06-10 09:15:27 +0200273MAKEFLAGS += -rR
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
275# Make variables (CC, etc...)
276
277AS = $(CROSS_COMPILE)as
278LD = $(CROSS_COMPILE)ld
279CC = $(CROSS_COMPILE)gcc
280CPP = $(CC) -E
281AR = $(CROSS_COMPILE)ar
282NM = $(CROSS_COMPILE)nm
283STRIP = $(CROSS_COMPILE)strip
284OBJCOPY = $(CROSS_COMPILE)objcopy
285OBJDUMP = $(CROSS_COMPILE)objdump
286AWK = awk
287GENKSYMS = scripts/genksyms/genksyms
288DEPMOD = /sbin/depmod
289KALLSYMS = scripts/kallsyms
290PERL = perl
291CHECK = sparse
292
Al Viroaf4ca452005-10-21 02:55:38 -0400293CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294MODFLAGS = -DMODULE
295CFLAGS_MODULE = $(MODFLAGS)
296AFLAGS_MODULE = $(MODFLAGS)
297LDFLAGS_MODULE = -r
298CFLAGS_KERNEL =
299AFLAGS_KERNEL =
300
301
302# Use LINUXINCLUDE when you must reference the include/ directory.
303# Needed to be compatible with the O= option
304LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100305 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800306 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
309
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200310CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
311 -fno-strict-aliasing -fno-common
Sam Ravnborg34c162f2006-07-02 20:21:49 +0200312# Force gcc to behave correct even for buggy distributions
313CFLAGS += $(call cc-option, -fno-stack-protector-all \
314 -fno-stack-protector)
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200315AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700317# Read KERNELRELEASE from include/config/kernel.release (if it exists)
318KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100319KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100320
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200321export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
322export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
323export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
324export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
326export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200327export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
329
330# When compiling out-of-tree modules, put MODVERDIR in the module
331# tree rather than in the kernel tree. The kernel tree might
332# even be read-only.
333export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335# Files to ignore in find ... statements
336
Trond Myklebust406119f2005-10-27 14:46:53 -0400337RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
338export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340# ===========================================================================
341# Rules shared between *config targets and build targets
342
343# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500344PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345scripts_basic:
346 $(Q)$(MAKE) $(build)=scripts/basic
347
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200348# To avoid any implicit rule to kick in, define an empty command.
349scripts/basic/%: scripts_basic ;
350
Paul Smith4f193362006-03-05 17:14:10 -0500351PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200352# outputmakefile generates a Makefile in the output directory, if using a
353# separate output directory. This allows convenient use of make in the
354# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200356ifneq ($(KBUILD_SRC),)
357 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
358 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
359endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361# To make sure we do not include .config for any of the *config targets
362# catch them early, and hand them over to scripts/kconfig/Makefile
363# It is allowed to specify more targets when calling make, including
364# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200365# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366# Detect when mixed targets is specified, and make a second invocation
367# of make so .config is not included in this case either (for *config).
368
369no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700370 cscope TAGS tags help %docs check% \
371 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
373config-targets := 0
374mixed-targets := 0
375dot-config := 1
376
377ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
378 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
379 dot-config := 0
380 endif
381endif
382
383ifeq ($(KBUILD_EXTMOD),)
384 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
385 config-targets := 1
386 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
387 mixed-targets := 1
388 endif
389 endif
390endif
391
392ifeq ($(mixed-targets),1)
393# ===========================================================================
394# We're called with mixed targets (*config and build targets).
395# Handle them one by one.
396
397%:: FORCE
398 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
399
400else
401ifeq ($(config-targets),1)
402# ===========================================================================
403# *config targets only - make sure prerequisites are updated, and descend
404# in scripts/kconfig to make the *config target
405
406# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
407# KBUILD_DEFCONFIG may point out an alternative default configuration
408# used for 'make defconfig'
409include $(srctree)/arch/$(ARCH)/Makefile
410export KBUILD_DEFCONFIG
411
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200412config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700413 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 $(Q)$(MAKE) $(build)=scripts/kconfig $@
415
416else
417# ===========================================================================
418# Build targets only - this includes vmlinux, arch specific targets, clean
419# targets and others. In general all targets except *config targets.
420
421ifeq ($(KBUILD_EXTMOD),)
422# Additional helpers built in scripts/
423# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200424# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500425PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700426scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 $(Q)$(MAKE) $(build)=$(@)
428
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429# 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 ($(dot-config),1)
438# In this section, we need .config
439
440# Read in dependencies to all Kconfig* files, make sure to run
441# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700442-include include/config/auto.conf.cmd
443-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700446$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
Roman Zippelc955cca2006-06-08 22:12:39 -0700448# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100449# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200450# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100451# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700452include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Roman Zippel3041e472006-06-18 21:09:09 -0700453ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
455else
Roman Zippel3041e472006-06-18 21:09:09 -0700456 $(error kernel configuration not valid - run 'make prepare' in $(srctree) to update it)
457endif
Roman Zippelc955cca2006-06-08 22:12:39 -0700458
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459else
460# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700461include/config/auto.conf: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462endif
463
464# The all: target is the default when no target is given on the
465# command line.
466# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200467# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468all: vmlinux
469
470ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
471CFLAGS += -Os
472else
473CFLAGS += -O2
474endif
475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700477CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478else
479CFLAGS += -fomit-frame-pointer
480endif
481
Jan Beulich604bf5a2006-03-24 03:16:19 -0800482ifdef CONFIG_UNWIND_INFO
483CFLAGS += -fasynchronous-unwind-tables
484endif
485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486ifdef CONFIG_DEBUG_INFO
487CFLAGS += -g
488endif
489
490include $(srctree)/arch/$(ARCH)/Makefile
491
Sam Ravnborge8e69932005-04-30 16:51:42 -0700492# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700493NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700494CHECKFLAGS += $(NOSTDINC_FLAGS)
495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496# warn about C99 declaration after statement
497CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
498
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200499# disable pointer signed / unsigned warnings in gcc 4.0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500CFLAGS += $(call cc-option,-Wno-pointer-sign,)
501
502# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200503# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504# set in the environment
505# Also any assignments in arch/$(ARCH)/Makefile take precedence over
506# this default value
507export KBUILD_IMAGE ?= vmlinux
508
509#
510# INSTALL_PATH specifies where to place the updated kernel and system map
511# images. Default is /boot, but you can set it to other values
512export INSTALL_PATH ?= /boot
513
514#
515# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
516# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200517# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518#
519
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100520MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521export MODLIB
522
Theodore Ts'oac031f22006-06-21 20:53:09 -0400523#
524# INSTALL_MOD_STRIP, if defined, will cause modules to be
525# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
526# the default option --strip-debug will be used. Otherwise,
527# INSTALL_MOD_STRIP will used as the options to the strip command.
528
529ifdef INSTALL_MOD_STRIP
530ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200531mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400532else
533mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
534endif # INSTALL_MOD_STRIP=1
535else
536mod_strip_cmd = true
537endif # INSTALL_MOD_STRIP
538export mod_strip_cmd
539
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
541ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100542core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
544vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
545 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
546 $(net-y) $(net-m) $(libs-y) $(libs-m)))
547
548vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
549 $(init-n) $(init-) \
550 $(core-n) $(core-) $(drivers-n) $(drivers-) \
551 $(net-n) $(net-) $(libs-n) $(libs-))))
552
553init-y := $(patsubst %/, %/built-in.o, $(init-y))
554core-y := $(patsubst %/, %/built-in.o, $(core-y))
555drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
556net-y := $(patsubst %/, %/built-in.o, $(net-y))
557libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
558libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
559libs-y := $(libs-y1) $(libs-y2)
560
561# Build vmlinux
562# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200563# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564# $(vmlinux-main). Most are built-in.o files from top-level directories
565# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
566# Ordering when linking is important, and $(vmlinux-init) must be first.
567#
568# vmlinux
569# ^
570# |
571# +-< $(vmlinux-init)
572# | +--< init/version.o + more
573# |
574# +--< $(vmlinux-main)
575# | +--< driver/built-in.o mm/built-in.o + more
576# |
577# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
578#
579# vmlinux version (uname -v) cannot be updated during normal
580# descending-into-subdirs phase since we do not yet know if we need to
581# update vmlinux.
582# Therefore this step is delayed until just before final link of vmlinux -
583# except in the kallsyms case where it is done just before adding the
584# symbols to the kernel.
585#
586# System.map is generated to document addresses of all kernel symbols
587
588vmlinux-init := $(head-y) $(init-y)
589vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
590vmlinux-all := $(vmlinux-init) $(vmlinux-main)
591vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
592
593# Rule to link vmlinux - also used during CONFIG_KALLSYMS
594# May be overridden by arch/$(ARCH)/Makefile
595quiet_cmd_vmlinux__ ?= LD $@
596 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
597 -T $(vmlinux-lds) $(vmlinux-init) \
598 --start-group $(vmlinux-main) --end-group \
599 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
600
601# Generate new vmlinux version
602quiet_cmd_vmlinux_version = GEN .version
603 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200604 if [ ! -r .version ]; then \
605 rm -f .version; \
606 echo 1 >.version; \
607 else \
608 mv .version .old_version; \
609 expr 0$$(cat .old_version) + 1 >.version; \
610 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 $(MAKE) $(build)=init
612
613# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200614quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
616
617# Link of vmlinux
618# If CONFIG_KALLSYMS is set .version is already updated
619# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700620# Use + in front of the vmlinux_version rule to silent warning with make -j2
621# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700623 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
625
626 $(call cmd,vmlinux__)
627 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
628
629 $(Q)$(if $($(quiet)cmd_sysmap), \
630 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
631 $(cmd_sysmap) $@ System.map; \
632 if [ $$? -ne 0 ]; then \
633 rm -f $@; \
634 /bin/false; \
635 fi;
636 $(verify_kallsyms)
637endef
638
639
640ifdef CONFIG_KALLSYMS
641# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
642# It's a three stage process:
643# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
644# empty
645# Running kallsyms on that gives us .tmp_kallsyms1.o with
646# the right size - vmlinux version (uname -v) is updated during this step
647# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
648# but due to the added section, some addresses have shifted.
649# From here, we generate a correct .tmp_kallsyms2.o
650# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
651# o Verify that the System.map from vmlinux matches the map from
652# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
653# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
654# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
655# temporary bypass to allow the kernel to be built while the
656# maintainers work out what went wrong with kallsyms.
657
658ifdef CONFIG_KALLSYMS_EXTRA_PASS
659last_kallsyms := 3
660else
661last_kallsyms := 2
662endif
663
664kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
665
666define verify_kallsyms
667 $(Q)$(if $($(quiet)cmd_sysmap), \
668 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
669 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
670 $(Q)cmp -s System.map .tmp_System.map || \
671 (echo Inconsistent kallsyms data; \
672 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
673 rm .tmp_kallsyms* ; /bin/false )
674endef
675
676# Update vmlinux version before link
677# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200678# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679cmd_ksym_ld = $(cmd_vmlinux__)
680define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200681 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 +$(call cmd,vmlinux_version)
683 $(call cmd,vmlinux__)
684 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
685endef
686
687# Generate .S file with all kernel symbols
688quiet_cmd_kallsyms = KSYM $@
689 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
690 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
691
692.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
693 $(call if_changed_dep,as_o_S)
694
695.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
696 $(call cmd,kallsyms)
697
698# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
699.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
700 $(call if_changed_rule,ksym_ld)
701
702.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
703 $(call if_changed,vmlinux__)
704
705.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
706 $(call if_changed,vmlinux__)
707
708# Needs to visit scripts/ before $(KALLSYMS) can be used.
709$(KALLSYMS): scripts ;
710
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000711# Generate some data for debugging strange kallsyms problems
712debug_kallsyms: .tmp_map$(last_kallsyms)
713
714.tmp_map%: .tmp_vmlinux% FORCE
715 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
716
717.tmp_map3: .tmp_map2
718
719.tmp_map2: .tmp_map1
720
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721endif # ifdef CONFIG_KALLSYMS
722
723# vmlinux image - including updated kernel symbols
724vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
725 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200726 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
728# The actual objects are generated when descending,
729# make sure no implicit rule kicks in
730$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
731
732# Handle descending into subdirectories listed in $(vmlinux-dirs)
733# Preset locale variables to speed up the build process. Limit locale
734# tweaks to this spot to avoid wrong language settings when running
735# make menuconfig etc.
736# Error messages still appears in the original language
737
Paul Smith4f193362006-03-05 17:14:10 -0500738PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200739$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 $(Q)$(MAKE) $(build)=$@
741
Sam Ravnborgcb584552006-01-09 21:20:34 +0100742# Build the kernel release string
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700743# The KERNELRELEASE is stored in a file named include/config/kernel.release
Sam Ravnborgcb584552006-01-09 21:20:34 +0100744# to be used when executing for example make install or make modules_install
745#
746# Take the contents of any files called localversion* and the config
747# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
748# LOCALVERSION from the command line override all of this
749
750nullstring :=
751space := $(nullstring) # end of line
752
753___localver = $(objtree)/localversion* $(srctree)/localversion*
754__localver = $(sort $(wildcard $(___localver)))
755# skip backup files (containing '~')
756_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
757
758localver = $(subst $(space),, \
759 $(shell cat /dev/null $(_localver)) \
760 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200761
Sam Ravnborgcb584552006-01-09 21:20:34 +0100762# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
763# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200764# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100765#
766# Currently, only git is supported.
767# Other SCMs can edit scripts/setlocalversion and add the appropriate
768# checks as needed.
769ifdef CONFIG_LOCALVERSION_AUTO
770 _localver-auto = $(shell $(CONFIG_SHELL) \
771 $(srctree)/scripts/setlocalversion $(srctree))
772 localver-auto = $(LOCALVERSION)$(_localver-auto)
773endif
774
775localver-full = $(localver)$(localver-auto)
776
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700777# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100778kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700779include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100780 $(Q)rm -f $@
781 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100782
783
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200785# or the modules are listed in "prepare".
786# A multi level approach is used. prepareN is processed before prepareN-1.
787# archprepare is used in arch Makefiles and when processed asm symlink,
788# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200790# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500791PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200792
793# prepare-all is deprecated, use prepare as valid replacement
Paul Smith4f193362006-03-05 17:14:10 -0500794PHONY += prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200796# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797# and if so do:
798# 1) Check that make has not been executed in the kernel src $(srctree)
799# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700800prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801ifneq ($(KBUILD_SRC),)
802 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700803 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 echo " $(srctree) is not clean, please run 'make mrproper'";\
805 echo " in the '$(srctree)' directory.";\
806 /bin/false; \
807 fi;
808 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
809 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
810endif
811
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200812# prepare2 creates a makefile if using a separate output directory
813prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200815prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
816 include/asm include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817ifneq ($(KBUILD_MODULES),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -0400819 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820endif
821
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200822archprepare: prepare1 scripts_basic
823
824prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200825 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200826
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200828prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200830# Leave this as default for preprocessing vmlinux.lds.S, which is now
831# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
833export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
834
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200835# FIXME: The asm symlink changes when $(ARCH) changes. That's
836# hard to detect, but I suppose "make mrproper" is a good idea
837# before switching between archs anyway.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
839include/asm:
840 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
841 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
842 @ln -fsn asm-$(ARCH) $@
843
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844# Generate some files
845# ---------------------------------------------------------------------------
846
847# KERNELRELEASE can change from a few different places, meaning version.h
848# needs to be updated, so this check is forced on all builds
849
850uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200851define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200853 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
854 exit 1; \
855 fi; \
856 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857endef
858
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200859define filechk_version.h
860 (echo \#define LINUX_VERSION_CODE $(shell \
861 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
862 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
863endef
864
865include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 $(call filechk,version.h)
867
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200868include/linux/utsrelease.h: include/config/kernel.release FORCE
869 $(call filechk,utsrelease.h)
870
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871# ---------------------------------------------------------------------------
872
Paul Smith4f193362006-03-05 17:14:10 -0500873PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874depend dep:
875 @echo '*** Warning: make $@ is unnecessary now.'
876
877# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100878# Kernel headers
879INSTALL_HDR_PATH=$(MODLIB)/abi
880export INSTALL_HDR_PATH
881
882PHONY += headers_install
883headers_install: include/linux/version.h
884 $(Q)unifdef -Ux /dev/null
885 $(Q)rm -rf $(INSTALL_HDR_PATH)/include
886 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include
887
David Woodhouse68475352006-06-18 12:02:10 +0100888PHONY += headers_check
889headers_check: headers_install
890 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
891
David Woodhouse8d730cf2006-06-18 11:58:39 +0100892# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893# Modules
894
895ifdef CONFIG_MODULES
896
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200897# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898
899all: modules
900
901# Build modules
902
Paul Smith4f193362006-03-05 17:14:10 -0500903PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
905 @echo ' Building modules, stage 2.';
906 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
907
908
909# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500910PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200911modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912
913# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500914PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915modules_install: _modinst_ _modinst_post
916
Paul Smith4f193362006-03-05 17:14:10 -0500917PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700919 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 echo "Warning: you may need to install module-init-tools"; \
921 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
922 sleep 1; \
923 fi
924 @rm -rf $(MODLIB)/kernel
925 @rm -f $(MODLIB)/source
926 @mkdir -p $(MODLIB)/kernel
927 @ln -s $(srctree) $(MODLIB)/source
928 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
929 rm -f $(MODLIB)/build ; \
930 ln -s $(objtree) $(MODLIB)/build ; \
931 fi
932 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
933
934# If System.map exists, run depmod. This deliberately does not have a
935# dependency on System.map since that would run the dependency tree on
936# vmlinux. This depmod is only for convenience to give the initial
937# boot a modules.dep even before / is mounted read-write. However the
938# boot script depmod is the master version.
939ifeq "$(strip $(INSTALL_MOD_PATH))" ""
940depmod_opts :=
941else
942depmod_opts := -b $(INSTALL_MOD_PATH) -r
943endif
Paul Smith4f193362006-03-05 17:14:10 -0500944PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945_modinst_post: _modinst_
946 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
947
948else # CONFIG_MODULES
949
950# Modules not configured
951# ---------------------------------------------------------------------------
952
953modules modules_install: FORCE
954 @echo
955 @echo "The present kernel configuration has modules disabled."
956 @echo "Type 'make config' and enable loadable module support."
957 @echo "Then build a kernel with module support enabled."
958 @echo
959 @exit 1
960
961endif # CONFIG_MODULES
962
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963###
964# Cleaning is done on three levels.
965# make clean Delete most generated files
966# Leave enough to build external modules
967# make mrproper Delete the current configuration, and all generated files
968# make distclean Remove editor backup files, patch leftover files and the like
969
970# Directories & files removed with 'make clean'
971CLEAN_DIRS += $(MODVERDIR)
972CLEAN_FILES += vmlinux System.map \
973 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
974
975# Directories & files removed with 'make mrproper'
976MRPROPER_DIRS += include/config include2
Tore Anderson50aa88e2006-01-07 15:34:40 +0100977MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200978 include/linux/autoconf.h include/linux/version.h \
979 include/linux/utsrelease.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700980 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
982# clean - Delete most, but leave enough to build external modules
983#
984clean: rm-dirs := $(CLEAN_DIRS)
985clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200986clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987
Paul Smith4f193362006-03-05 17:14:10 -0500988PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989$(clean-dirs):
990 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
991
992clean: archclean $(clean-dirs)
993 $(call cmd,rmdirs)
994 $(call cmd,rmfiles)
995 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200996 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +0200997 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
998 -o -name '*.symtypes' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 -type f -print | xargs rm -f
1000
1001# mrproper - Delete all generated files, including .config
1002#
1003mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1004mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1005mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1006
Paul Smith4f193362006-03-05 17:14:10 -05001007PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008$(mrproper-dirs):
1009 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1010
1011mrproper: clean archmrproper $(mrproper-dirs)
1012 $(call cmd,rmdirs)
1013 $(call cmd,rmfiles)
1014
1015# distclean
1016#
Paul Smith4f193362006-03-05 17:14:10 -05001017PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018
1019distclean: mrproper
1020 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001021 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001023 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1025 -type f -print | xargs rm -f
1026
1027
1028# Packaging of the kernel to various formats
1029# ---------------------------------------------------------------------------
1030# rpm target kept for backward compatibility
1031package-dir := $(srctree)/scripts/package
1032
Zach Brown031ecc62006-06-08 22:12:37 -07001033%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001034 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001035rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001036 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037
1038
1039# Brief documentation of the typical targets used
1040# ---------------------------------------------------------------------------
1041
1042boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1043boards := $(notdir $(boards))
1044
1045help:
1046 @echo 'Cleaning targets:'
1047 @echo ' clean - remove most generated files but keep the config'
1048 @echo ' mrproper - remove all generated files + config + various backup files'
1049 @echo ''
1050 @echo 'Configuration targets:'
1051 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1052 @echo ''
1053 @echo 'Other generic targets:'
1054 @echo ' all - Build all targets marked with [*]'
1055 @echo '* vmlinux - Build the bare kernel'
1056 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001057 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 @echo ' dir/ - Build all files in dir and below'
1059 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001060 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 @echo ' rpm - Build a kernel as an RPM package'
1062 @echo ' tags/TAGS - Generate tags file for editors'
1063 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001064 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001065 @echo ' kernelversion - Output the version stored in Makefile'
David Woodhouse8d730cf2006-06-18 11:58:39 +01001066 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'
1067 @echo ' (default: /lib/modules/$$VERSION/abi)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 @echo ''
1069 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 @echo ' checkstack - Generate a list of stack hogs'
1071 @echo ' namespacecheck - Name space analysis on compiled kernel'
1072 @echo ''
1073 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001074 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 @echo ''
1076 @echo 'Documentation targets:'
1077 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1078 @echo ''
1079 @echo 'Architecture specific targets ($(ARCH)):'
1080 @$(if $(archhelp),$(archhelp),\
1081 echo ' No architecture specific help defined for $(ARCH)')
1082 @echo ''
1083 @$(if $(boards), \
1084 $(foreach b, $(boards), \
1085 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1086 echo '')
1087
1088 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1089 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001090 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1091 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 @echo ''
1093 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1094 @echo 'For further info see the ./README file'
1095
1096
1097# Documentation targets
1098# ---------------------------------------------------------------------------
1099%docs: scripts_basic FORCE
1100 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1101
1102else # KBUILD_EXTMOD
1103
1104###
1105# External module support.
1106# When building external modules the kernel used as basis is considered
1107# read-only, and no consistency checks are made and the make
1108# system is not used on the basis kernel. If updates are required
1109# in the basis kernel ordinary make commands (without M=...) must
1110# be used.
1111#
1112# The following are the only valid targets when building external
1113# modules.
1114# make M=dir clean Delete all automatically generated files
1115# make M=dir modules Make all modules in specified dir
1116# make M=dir Same as 'make M=dir modules'
1117# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001118# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119# Assumes install directory is already created
1120
1121# We are always building modules
1122KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001123PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124crmodverdir:
1125 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -04001126 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127
Paul Smith4f193362006-03-05 17:14:10 -05001128PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129$(objtree)/Module.symvers:
1130 @test -e $(objtree)/Module.symvers || ( \
1131 echo; \
1132 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1133 echo " is missing; modules will have no dependencies and modversions."; \
1134 echo )
1135
1136module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001137PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138$(module-dirs): crmodverdir $(objtree)/Module.symvers
1139 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1140
1141modules: $(module-dirs)
1142 @echo ' Building modules, stage 2.';
1143 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1144
Paul Smith4f193362006-03-05 17:14:10 -05001145PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001146modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001147
Paul Smith4f193362006-03-05 17:14:10 -05001148install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1149PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001150_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001151 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1153
Sam Ravnborga67dc212006-01-28 23:51:57 +01001154# Run depmod only is we have System.map and depmod is executable
1155quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1156 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1157 $(DEPMOD) -ae -F System.map \
1158 $(if $(strip $(INSTALL_MOD_PATH)), \
1159 -b $(INSTALL_MOD_PATH) -r) \
1160 $(KERNELRELEASE); \
1161 fi
1162
Paul Smith4f193362006-03-05 17:14:10 -05001163PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001164_emodinst_post: _emodinst_
1165 $(call cmd,depmod)
1166
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1168
Paul Smith4f193362006-03-05 17:14:10 -05001169PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170$(clean-dirs):
1171 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1172
1173clean: rm-dirs := $(MODVERDIR)
1174clean: $(clean-dirs)
1175 $(call cmd,rmdirs)
1176 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001177 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1179 -type f -print | xargs rm -f
1180
1181help:
1182 @echo ' Building external modules.'
1183 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1184 @echo ''
1185 @echo ' modules - default target, build the module(s)'
1186 @echo ' modules_install - install the module'
1187 @echo ' clean - remove generated files in module directory only'
1188 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001189
1190# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001191PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001192prepare: ;
1193scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194endif # KBUILD_EXTMOD
1195
1196# Generate tags for editors
1197# ---------------------------------------------------------------------------
1198
1199#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1200#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1201#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1202
George Anzingerf182ae62005-07-07 17:56:06 -07001203ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204__srctree =
1205else
1206__srctree = $(srctree)/
1207endif
1208
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001209ifeq ($(ALLSOURCE_ARCHS),)
1210ifeq ($(ARCH),um)
1211ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1212else
1213ALLINCLUDE_ARCHS := $(ARCH)
1214endif
1215else
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001216#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001217ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1218endif
1219
Ian Campbella0674e82005-06-23 11:25:54 +01001220ALLSOURCE_ARCHS := $(ARCH)
1221
Masatake YAMATOe838db62006-06-22 12:21:20 +09001222define find-sources
1223 ( find $(__srctree) $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 \( -name include -o -name arch \) -prune -o \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001225 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001226 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1227 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001228 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001229 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001231 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 find $(__srctree)include $(RCS_FIND_IGNORE) \
1233 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001234 -o -name $1 -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001235 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001236 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001237 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001238 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001240 -name $1 -print )
1241endef
1242
1243define all-sources
1244 $(call find-sources,'*.[chS]')
1245endef
1246define all-kconfigs
1247 $(call find-sources,'Kconfig*')
1248endef
1249define all-defconfigs
1250 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251endef
1252
1253quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001254 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255
1256quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001257 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
1259cscope: FORCE
1260 $(call cmd,cscope-file)
1261 $(call cmd,cscope)
1262
1263quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001264define cmd_TAGS
1265 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001266 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1267 echo "-I __initdata,__exitdata,__acquires,__releases \
1268 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1269 --extra=+f --c-kinds=+px"`; \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001270 $(all-sources) | xargs etags $$ETAGSF -a; \
1271 if test "x$$ETAGSF" = x; then \
1272 $(all-kconfigs) | xargs etags -a \
1273 --regex='/^config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1274 $(all-defconfigs) | xargs etags -a \
1275 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1276 fi
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001277endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001279TAGS: FORCE
1280 $(call cmd,TAGS)
1281
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
1283quiet_cmd_tags = MAKE $@
1284define cmd_tags
1285 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001286 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1287 echo "-I __initdata,__exitdata,__acquires,__releases \
1288 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1289 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001290 $(all-sources) | xargs ctags $$CTAGSF -a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291endef
1292
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293tags: FORCE
1294 $(call cmd,tags)
1295
1296
1297# Scripts to check various things for consistency
1298# ---------------------------------------------------------------------------
1299
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300includecheck:
1301 find * $(RCS_FIND_IGNORE) \
1302 -name '*.[hcS]' -type f -print | sort \
1303 | xargs $(PERL) -w scripts/checkincludes.pl
1304
1305versioncheck:
1306 find * $(RCS_FIND_IGNORE) \
1307 -name '*.[hcS]' -type f -print | sort \
1308 | xargs $(PERL) -w scripts/checkversion.pl
1309
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310namespacecheck:
1311 $(PERL) $(srctree)/scripts/namespace.pl
1312
1313endif #ifeq ($(config-targets),1)
1314endif #ifeq ($(mixed-targets),1)
1315
Roman Zippelc30a02e2006-06-08 22:12:50 -07001316PHONY += checkstack kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317checkstack:
1318 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1319 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1320
1321kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001322 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1323 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001324kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001325 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326
Sam Ravnborg06300b22006-01-25 07:13:18 +01001327# Single targets
1328# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001329# Single targets are compatible with:
1330# - build whith mixed source and output
1331# - build with separate output dir 'make O=...'
1332# - external modules
1333#
1334# target-dir => where to store outputfile
1335# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001336
Sam Ravnborg06300b22006-01-25 07:13:18 +01001337ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001338 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001339 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001340else
1341 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001342 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1343 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001344endif
1345
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001346%.s: %.c prepare scripts FORCE
1347 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1348%.i: %.c prepare scripts FORCE
1349 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1350%.o: %.c prepare scripts FORCE
1351 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1352%.lst: %.c prepare scripts FORCE
1353 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1354%.s: %.S prepare scripts FORCE
1355 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1356%.o: %.S prepare scripts FORCE
1357 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001358%.symtypes: %.c prepare scripts FORCE
1359 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001360
1361# Modules
1362/ %/: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001363 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001364 $(build)=$(build-dir)
1365%.ko: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001366 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001367 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001368 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1369
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370# FIXME Should go into a make.lib or something
1371# ===========================================================================
1372
1373quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1374 cmd_rmdirs = rm -rf $(rm-dirs)
1375
1376quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1377 cmd_rmfiles = rm -f $(rm-files)
1378
1379
1380a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1381 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001382 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383
1384quiet_cmd_as_o_S = AS $@
1385cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1386
1387# read all saved command lines
1388
1389targets := $(wildcard $(sort $(targets)))
1390cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1391
1392ifneq ($(cmd_files),)
1393 $(cmd_files): ; # Do not try to update included dependency files
1394 include $(cmd_files)
1395endif
1396
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1398# Usage:
1399# $(Q)$(MAKE) $(clean)=dir
1400clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1401
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402endif # skip-makefile
1403
Paul Smith4f193362006-03-05 17:14:10 -05001404PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001406
1407
1408# Declare the contents of the .PHONY variable as phony. We keep that
1409# information in a variable se we can use it in if_changed and friends.
1410.PHONY: $(PHONY)