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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 Torvalds95064a72006-09-12 18:41:36 -07004EXTRAVERSION = -rc7
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
312AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700314# Read KERNELRELEASE from include/config/kernel.release (if it exists)
315KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100316KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100317
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200318export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
319export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
320export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
321export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200324export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
326
327# When compiling out-of-tree modules, put MODVERDIR in the module
328# tree rather than in the kernel tree. The kernel tree might
329# even be read-only.
330export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
331
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332# Files to ignore in find ... statements
333
Trond Myklebust406119f2005-10-27 14:46:53 -0400334RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
335export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337# ===========================================================================
338# Rules shared between *config targets and build targets
339
340# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500341PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342scripts_basic:
343 $(Q)$(MAKE) $(build)=scripts/basic
344
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200345# To avoid any implicit rule to kick in, define an empty command.
346scripts/basic/%: scripts_basic ;
347
Paul Smith4f193362006-03-05 17:14:10 -0500348PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200349# outputmakefile generates a Makefile in the output directory, if using a
350# separate output directory. This allows convenient use of make in the
351# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200353ifneq ($(KBUILD_SRC),)
354 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
355 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
356endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
358# To make sure we do not include .config for any of the *config targets
359# catch them early, and hand them over to scripts/kconfig/Makefile
360# It is allowed to specify more targets when calling make, including
361# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200362# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363# Detect when mixed targets is specified, and make a second invocation
364# of make so .config is not included in this case either (for *config).
365
366no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700367 cscope TAGS tags help %docs check% \
Sam Ravnborg667918a2006-07-08 00:46:25 +0200368 include/linux/version.h headers_% \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700369 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
371config-targets := 0
372mixed-targets := 0
373dot-config := 1
374
375ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
376 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
377 dot-config := 0
378 endif
379endif
380
381ifeq ($(KBUILD_EXTMOD),)
382 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
383 config-targets := 1
384 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
385 mixed-targets := 1
386 endif
387 endif
388endif
389
390ifeq ($(mixed-targets),1)
391# ===========================================================================
392# We're called with mixed targets (*config and build targets).
393# Handle them one by one.
394
395%:: FORCE
396 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
397
398else
399ifeq ($(config-targets),1)
400# ===========================================================================
401# *config targets only - make sure prerequisites are updated, and descend
402# in scripts/kconfig to make the *config target
403
404# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
405# KBUILD_DEFCONFIG may point out an alternative default configuration
406# used for 'make defconfig'
407include $(srctree)/arch/$(ARCH)/Makefile
408export KBUILD_DEFCONFIG
409
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200410config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700411 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 $(Q)$(MAKE) $(build)=scripts/kconfig $@
413
414else
415# ===========================================================================
416# Build targets only - this includes vmlinux, arch specific targets, clean
417# targets and others. In general all targets except *config targets.
418
419ifeq ($(KBUILD_EXTMOD),)
420# Additional helpers built in scripts/
421# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200422# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500423PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700424scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 $(Q)$(MAKE) $(build)=$(@)
426
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427# Objects we will link into vmlinux / subdirs we need to visit
428init-y := init/
429drivers-y := drivers/ sound/
430net-y := net/
431libs-y := lib/
432core-y := usr/
433endif # KBUILD_EXTMOD
434
435ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200436# Read in config
437-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200439ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440# 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700445$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
Roman Zippelc955cca2006-06-08 22:12:39 -0700447# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100448# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200449# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100450# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700451include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
453else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200454# external modules needs include/linux/autoconf.h and include/config/auto.conf
455# but do not care if they are up-to-date. Use auto.conf to trigger the test
456PHONY += include/config/auto.conf
457
458include/config/auto.conf:
459 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
460 echo; \
461 echo " ERROR: Kernel configuration is invalid."; \
462 echo " include/linux/autoconf.h or $@ are missing."; \
463 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
464 echo; \
465 /bin/false)
466
467endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700468
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469else
470# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700471include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200472endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474# The all: target is the default when no target is given on the
475# command line.
476# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200477# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478all: vmlinux
479
480ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
481CFLAGS += -Os
482else
483CFLAGS += -O2
484endif
485
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200486include $(srctree)/arch/$(ARCH)/Makefile
487
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700489CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490else
491CFLAGS += -fomit-frame-pointer
492endif
493
Jan Beulich604bf5a2006-03-24 03:16:19 -0800494ifdef CONFIG_UNWIND_INFO
495CFLAGS += -fasynchronous-unwind-tables
496endif
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498ifdef CONFIG_DEBUG_INFO
499CFLAGS += -g
500endif
501
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200502# Force gcc to behave correct even for buggy distributions
503CFLAGS += $(call cc-option, -fno-stack-protector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
Sam Ravnborge8e69932005-04-30 16:51:42 -0700505# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700506NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700507CHECKFLAGS += $(NOSTDINC_FLAGS)
508
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509# warn about C99 declaration after statement
510CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
511
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200512# disable pointer signed / unsigned warnings in gcc 4.0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513CFLAGS += $(call cc-option,-Wno-pointer-sign,)
514
515# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200516# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517# set in the environment
518# Also any assignments in arch/$(ARCH)/Makefile take precedence over
519# this default value
520export KBUILD_IMAGE ?= vmlinux
521
522#
523# INSTALL_PATH specifies where to place the updated kernel and system map
524# images. Default is /boot, but you can set it to other values
525export INSTALL_PATH ?= /boot
526
527#
528# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
529# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200530# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531#
532
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100533MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534export MODLIB
535
Theodore Ts'oac031f22006-06-21 20:53:09 -0400536#
537# INSTALL_MOD_STRIP, if defined, will cause modules to be
538# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
539# the default option --strip-debug will be used. Otherwise,
540# INSTALL_MOD_STRIP will used as the options to the strip command.
541
542ifdef INSTALL_MOD_STRIP
543ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200544mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400545else
546mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
547endif # INSTALL_MOD_STRIP=1
548else
549mod_strip_cmd = true
550endif # INSTALL_MOD_STRIP
551export mod_strip_cmd
552
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
554ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100555core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
557vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
558 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
559 $(net-y) $(net-m) $(libs-y) $(libs-m)))
560
561vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
562 $(init-n) $(init-) \
563 $(core-n) $(core-) $(drivers-n) $(drivers-) \
564 $(net-n) $(net-) $(libs-n) $(libs-))))
565
566init-y := $(patsubst %/, %/built-in.o, $(init-y))
567core-y := $(patsubst %/, %/built-in.o, $(core-y))
568drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
569net-y := $(patsubst %/, %/built-in.o, $(net-y))
570libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
571libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
572libs-y := $(libs-y1) $(libs-y2)
573
574# Build vmlinux
575# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200576# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577# $(vmlinux-main). Most are built-in.o files from top-level directories
578# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
579# Ordering when linking is important, and $(vmlinux-init) must be first.
580#
581# vmlinux
582# ^
583# |
584# +-< $(vmlinux-init)
585# | +--< init/version.o + more
586# |
587# +--< $(vmlinux-main)
588# | +--< driver/built-in.o mm/built-in.o + more
589# |
590# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
591#
592# vmlinux version (uname -v) cannot be updated during normal
593# descending-into-subdirs phase since we do not yet know if we need to
594# update vmlinux.
595# Therefore this step is delayed until just before final link of vmlinux -
596# except in the kallsyms case where it is done just before adding the
597# symbols to the kernel.
598#
599# System.map is generated to document addresses of all kernel symbols
600
601vmlinux-init := $(head-y) $(init-y)
602vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
603vmlinux-all := $(vmlinux-init) $(vmlinux-main)
604vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
605
606# Rule to link vmlinux - also used during CONFIG_KALLSYMS
607# May be overridden by arch/$(ARCH)/Makefile
608quiet_cmd_vmlinux__ ?= LD $@
609 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
610 -T $(vmlinux-lds) $(vmlinux-init) \
611 --start-group $(vmlinux-main) --end-group \
612 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
613
614# Generate new vmlinux version
615quiet_cmd_vmlinux_version = GEN .version
616 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200617 if [ ! -r .version ]; then \
618 rm -f .version; \
619 echo 1 >.version; \
620 else \
621 mv .version .old_version; \
622 expr 0$$(cat .old_version) + 1 >.version; \
623 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 $(MAKE) $(build)=init
625
626# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200627quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
629
630# Link of vmlinux
631# If CONFIG_KALLSYMS is set .version is already updated
632# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700633# Use + in front of the vmlinux_version rule to silent warning with make -j2
634# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700636 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
638
639 $(call cmd,vmlinux__)
640 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
641
642 $(Q)$(if $($(quiet)cmd_sysmap), \
643 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
644 $(cmd_sysmap) $@ System.map; \
645 if [ $$? -ne 0 ]; then \
646 rm -f $@; \
647 /bin/false; \
648 fi;
649 $(verify_kallsyms)
650endef
651
652
653ifdef CONFIG_KALLSYMS
654# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
655# It's a three stage process:
656# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
657# empty
658# Running kallsyms on that gives us .tmp_kallsyms1.o with
659# the right size - vmlinux version (uname -v) is updated during this step
660# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
661# but due to the added section, some addresses have shifted.
662# From here, we generate a correct .tmp_kallsyms2.o
663# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
664# o Verify that the System.map from vmlinux matches the map from
665# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
666# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
667# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
668# temporary bypass to allow the kernel to be built while the
669# maintainers work out what went wrong with kallsyms.
670
671ifdef CONFIG_KALLSYMS_EXTRA_PASS
672last_kallsyms := 3
673else
674last_kallsyms := 2
675endif
676
677kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
678
679define verify_kallsyms
680 $(Q)$(if $($(quiet)cmd_sysmap), \
681 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
682 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
683 $(Q)cmp -s System.map .tmp_System.map || \
684 (echo Inconsistent kallsyms data; \
685 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
686 rm .tmp_kallsyms* ; /bin/false )
687endef
688
689# Update vmlinux version before link
690# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200691# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692cmd_ksym_ld = $(cmd_vmlinux__)
693define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200694 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 +$(call cmd,vmlinux_version)
696 $(call cmd,vmlinux__)
697 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
698endef
699
700# Generate .S file with all kernel symbols
701quiet_cmd_kallsyms = KSYM $@
702 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
703 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
704
705.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
706 $(call if_changed_dep,as_o_S)
707
708.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
709 $(call cmd,kallsyms)
710
711# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
712.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
713 $(call if_changed_rule,ksym_ld)
714
715.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
716 $(call if_changed,vmlinux__)
717
718.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
719 $(call if_changed,vmlinux__)
720
721# Needs to visit scripts/ before $(KALLSYMS) can be used.
722$(KALLSYMS): scripts ;
723
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000724# Generate some data for debugging strange kallsyms problems
725debug_kallsyms: .tmp_map$(last_kallsyms)
726
727.tmp_map%: .tmp_vmlinux% FORCE
728 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
729
730.tmp_map3: .tmp_map2
731
732.tmp_map2: .tmp_map1
733
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734endif # ifdef CONFIG_KALLSYMS
735
736# vmlinux image - including updated kernel symbols
737vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
738 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200739 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740
741# The actual objects are generated when descending,
742# make sure no implicit rule kicks in
743$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
744
745# Handle descending into subdirectories listed in $(vmlinux-dirs)
746# Preset locale variables to speed up the build process. Limit locale
747# tweaks to this spot to avoid wrong language settings when running
748# make menuconfig etc.
749# Error messages still appears in the original language
750
Paul Smith4f193362006-03-05 17:14:10 -0500751PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200752$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 $(Q)$(MAKE) $(build)=$@
754
Sam Ravnborgcb584552006-01-09 21:20:34 +0100755# Build the kernel release string
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700756# The KERNELRELEASE is stored in a file named include/config/kernel.release
Sam Ravnborgcb584552006-01-09 21:20:34 +0100757# to be used when executing for example make install or make modules_install
758#
759# Take the contents of any files called localversion* and the config
760# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
761# LOCALVERSION from the command line override all of this
762
763nullstring :=
764space := $(nullstring) # end of line
765
766___localver = $(objtree)/localversion* $(srctree)/localversion*
767__localver = $(sort $(wildcard $(___localver)))
768# skip backup files (containing '~')
769_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
770
771localver = $(subst $(space),, \
772 $(shell cat /dev/null $(_localver)) \
773 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200774
Sam Ravnborgcb584552006-01-09 21:20:34 +0100775# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
776# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200777# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100778#
779# Currently, only git is supported.
780# Other SCMs can edit scripts/setlocalversion and add the appropriate
781# checks as needed.
782ifdef CONFIG_LOCALVERSION_AUTO
783 _localver-auto = $(shell $(CONFIG_SHELL) \
784 $(srctree)/scripts/setlocalversion $(srctree))
785 localver-auto = $(LOCALVERSION)$(_localver-auto)
786endif
787
788localver-full = $(localver)$(localver-auto)
789
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700790# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100791kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700792include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100793 $(Q)rm -f $@
794 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100795
796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200798# or the modules are listed in "prepare".
799# A multi level approach is used. prepareN is processed before prepareN-1.
800# archprepare is used in arch Makefiles and when processed asm symlink,
801# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200803# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500804PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200805
806# prepare-all is deprecated, use prepare as valid replacement
Paul Smith4f193362006-03-05 17:14:10 -0500807PHONY += prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200809# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810# and if so do:
811# 1) Check that make has not been executed in the kernel src $(srctree)
812# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700813prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814ifneq ($(KBUILD_SRC),)
815 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700816 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 echo " $(srctree) is not clean, please run 'make mrproper'";\
818 echo " in the '$(srctree)' directory.";\
819 /bin/false; \
820 fi;
821 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
822 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
823endif
824
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200825# prepare2 creates a makefile if using a separate output directory
826prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200828prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
829 include/asm include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830ifneq ($(KBUILD_MODULES),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -0400832 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833endif
834
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200835archprepare: prepare1 scripts_basic
836
837prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200838 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200839
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200841prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200843# Leave this as default for preprocessing vmlinux.lds.S, which is now
844# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
846export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
847
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200848# FIXME: The asm symlink changes when $(ARCH) changes. That's
849# hard to detect, but I suppose "make mrproper" is a good idea
850# before switching between archs anyway.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
852include/asm:
853 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
854 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
855 @ln -fsn asm-$(ARCH) $@
856
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857# Generate some files
858# ---------------------------------------------------------------------------
859
860# KERNELRELEASE can change from a few different places, meaning version.h
861# needs to be updated, so this check is forced on all builds
862
863uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200864define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200866 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
867 exit 1; \
868 fi; \
869 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870endef
871
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200872define filechk_version.h
873 (echo \#define LINUX_VERSION_CODE $(shell \
874 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
875 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
876endef
877
878include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 $(call filechk,version.h)
880
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200881include/linux/utsrelease.h: include/config/kernel.release FORCE
882 $(call filechk,utsrelease.h)
883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884# ---------------------------------------------------------------------------
885
Paul Smith4f193362006-03-05 17:14:10 -0500886PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887depend dep:
888 @echo '*** Warning: make $@ is unnecessary now.'
889
890# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100891# Kernel headers
David Woodhouse1ab7a1f32006-09-16 12:15:55 -0700892INSTALL_HDR_PATH=$(objtree)/usr
David Woodhouse8d730cf2006-06-18 11:58:39 +0100893export INSTALL_HDR_PATH
894
895PHONY += headers_install
896headers_install: include/linux/version.h
897 $(Q)unifdef -Ux /dev/null
898 $(Q)rm -rf $(INSTALL_HDR_PATH)/include
899 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include
900
David Woodhouse68475352006-06-18 12:02:10 +0100901PHONY += headers_check
902headers_check: headers_install
903 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
904
David Woodhouse8d730cf2006-06-18 11:58:39 +0100905# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906# Modules
907
908ifdef CONFIG_MODULES
909
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200910# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
912all: modules
913
914# Build modules
915
Paul Smith4f193362006-03-05 17:14:10 -0500916PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
918 @echo ' Building modules, stage 2.';
919 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
920
921
922# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500923PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200924modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925
926# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500927PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928modules_install: _modinst_ _modinst_post
929
Paul Smith4f193362006-03-05 17:14:10 -0500930PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700932 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 echo "Warning: you may need to install module-init-tools"; \
934 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
935 sleep 1; \
936 fi
937 @rm -rf $(MODLIB)/kernel
938 @rm -f $(MODLIB)/source
939 @mkdir -p $(MODLIB)/kernel
940 @ln -s $(srctree) $(MODLIB)/source
941 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
942 rm -f $(MODLIB)/build ; \
943 ln -s $(objtree) $(MODLIB)/build ; \
944 fi
945 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
946
947# If System.map exists, run depmod. This deliberately does not have a
948# dependency on System.map since that would run the dependency tree on
949# vmlinux. This depmod is only for convenience to give the initial
950# boot a modules.dep even before / is mounted read-write. However the
951# boot script depmod is the master version.
952ifeq "$(strip $(INSTALL_MOD_PATH))" ""
953depmod_opts :=
954else
955depmod_opts := -b $(INSTALL_MOD_PATH) -r
956endif
Paul Smith4f193362006-03-05 17:14:10 -0500957PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958_modinst_post: _modinst_
959 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
960
961else # CONFIG_MODULES
962
963# Modules not configured
964# ---------------------------------------------------------------------------
965
966modules modules_install: FORCE
967 @echo
968 @echo "The present kernel configuration has modules disabled."
969 @echo "Type 'make config' and enable loadable module support."
970 @echo "Then build a kernel with module support enabled."
971 @echo
972 @exit 1
973
974endif # CONFIG_MODULES
975
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976###
977# Cleaning is done on three levels.
978# make clean Delete most generated files
979# Leave enough to build external modules
980# make mrproper Delete the current configuration, and all generated files
981# make distclean Remove editor backup files, patch leftover files and the like
982
983# Directories & files removed with 'make clean'
984CLEAN_DIRS += $(MODVERDIR)
985CLEAN_FILES += vmlinux System.map \
986 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
987
988# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f32006-09-16 12:15:55 -0700989MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +0100990MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200991 include/linux/autoconf.h include/linux/version.h \
992 include/linux/utsrelease.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700993 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
995# clean - Delete most, but leave enough to build external modules
996#
997clean: rm-dirs := $(CLEAN_DIRS)
998clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200999clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000
Paul Smith4f193362006-03-05 17:14:10 -05001001PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002$(clean-dirs):
1003 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1004
1005clean: archclean $(clean-dirs)
1006 $(call cmd,rmdirs)
1007 $(call cmd,rmfiles)
1008 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001009 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001010 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1011 -o -name '*.symtypes' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 -type f -print | xargs rm -f
1013
1014# mrproper - Delete all generated files, including .config
1015#
1016mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1017mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1018mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1019
Paul Smith4f193362006-03-05 17:14:10 -05001020PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021$(mrproper-dirs):
1022 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1023
1024mrproper: clean archmrproper $(mrproper-dirs)
1025 $(call cmd,rmdirs)
1026 $(call cmd,rmfiles)
1027
1028# distclean
1029#
Paul Smith4f193362006-03-05 17:14:10 -05001030PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031
1032distclean: mrproper
1033 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001034 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001036 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1038 -type f -print | xargs rm -f
1039
1040
1041# Packaging of the kernel to various formats
1042# ---------------------------------------------------------------------------
1043# rpm target kept for backward compatibility
1044package-dir := $(srctree)/scripts/package
1045
Zach Brown031ecc62006-06-08 22:12:37 -07001046%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001047 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001048rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001049 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050
1051
1052# Brief documentation of the typical targets used
1053# ---------------------------------------------------------------------------
1054
1055boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1056boards := $(notdir $(boards))
1057
1058help:
1059 @echo 'Cleaning targets:'
1060 @echo ' clean - remove most generated files but keep the config'
1061 @echo ' mrproper - remove all generated files + config + various backup files'
1062 @echo ''
1063 @echo 'Configuration targets:'
1064 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1065 @echo ''
1066 @echo 'Other generic targets:'
1067 @echo ' all - Build all targets marked with [*]'
1068 @echo '* vmlinux - Build the bare kernel'
1069 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001070 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 @echo ' dir/ - Build all files in dir and below'
1072 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001073 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 @echo ' rpm - Build a kernel as an RPM package'
1075 @echo ' tags/TAGS - Generate tags file for editors'
1076 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001077 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001078 @echo ' kernelversion - Output the version stored in Makefile'
David Woodhouse8d730cf2006-06-18 11:58:39 +01001079 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'
David Woodhouse1ab7a1f32006-09-16 12:15:55 -07001080 @echo ' (default: $(INSTALL_HDR_PATH))'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 @echo ''
1082 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 @echo ' checkstack - Generate a list of stack hogs'
1084 @echo ' namespacecheck - Name space analysis on compiled kernel'
1085 @echo ''
1086 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001087 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 @echo ''
1089 @echo 'Documentation targets:'
1090 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1091 @echo ''
1092 @echo 'Architecture specific targets ($(ARCH)):'
1093 @$(if $(archhelp),$(archhelp),\
1094 echo ' No architecture specific help defined for $(ARCH)')
1095 @echo ''
1096 @$(if $(boards), \
1097 $(foreach b, $(boards), \
1098 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1099 echo '')
1100
1101 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1102 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001103 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1104 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 @echo ''
1106 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1107 @echo 'For further info see the ./README file'
1108
1109
1110# Documentation targets
1111# ---------------------------------------------------------------------------
1112%docs: scripts_basic FORCE
1113 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1114
1115else # KBUILD_EXTMOD
1116
1117###
1118# External module support.
1119# When building external modules the kernel used as basis is considered
1120# read-only, and no consistency checks are made and the make
1121# system is not used on the basis kernel. If updates are required
1122# in the basis kernel ordinary make commands (without M=...) must
1123# be used.
1124#
1125# The following are the only valid targets when building external
1126# modules.
1127# make M=dir clean Delete all automatically generated files
1128# make M=dir modules Make all modules in specified dir
1129# make M=dir Same as 'make M=dir modules'
1130# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001131# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132# Assumes install directory is already created
1133
1134# We are always building modules
1135KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001136PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137crmodverdir:
1138 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -04001139 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140
Paul Smith4f193362006-03-05 17:14:10 -05001141PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142$(objtree)/Module.symvers:
1143 @test -e $(objtree)/Module.symvers || ( \
1144 echo; \
1145 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1146 echo " is missing; modules will have no dependencies and modversions."; \
1147 echo )
1148
1149module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001150PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151$(module-dirs): crmodverdir $(objtree)/Module.symvers
1152 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1153
1154modules: $(module-dirs)
1155 @echo ' Building modules, stage 2.';
1156 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1157
Paul Smith4f193362006-03-05 17:14:10 -05001158PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001159modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001160
Paul Smith4f193362006-03-05 17:14:10 -05001161install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1162PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001163_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001164 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1166
Sam Ravnborga67dc212006-01-28 23:51:57 +01001167# Run depmod only is we have System.map and depmod is executable
1168quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1169 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1170 $(DEPMOD) -ae -F System.map \
1171 $(if $(strip $(INSTALL_MOD_PATH)), \
1172 -b $(INSTALL_MOD_PATH) -r) \
1173 $(KERNELRELEASE); \
1174 fi
1175
Paul Smith4f193362006-03-05 17:14:10 -05001176PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001177_emodinst_post: _emodinst_
1178 $(call cmd,depmod)
1179
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1181
Paul Smith4f193362006-03-05 17:14:10 -05001182PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183$(clean-dirs):
1184 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1185
1186clean: rm-dirs := $(MODVERDIR)
1187clean: $(clean-dirs)
1188 $(call cmd,rmdirs)
1189 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001190 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1192 -type f -print | xargs rm -f
1193
1194help:
1195 @echo ' Building external modules.'
1196 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1197 @echo ''
1198 @echo ' modules - default target, build the module(s)'
1199 @echo ' modules_install - install the module'
1200 @echo ' clean - remove generated files in module directory only'
1201 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001202
1203# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001204PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001205prepare: ;
1206scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207endif # KBUILD_EXTMOD
1208
1209# Generate tags for editors
1210# ---------------------------------------------------------------------------
1211
1212#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1213#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1214#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1215
George Anzingerf182ae62005-07-07 17:56:06 -07001216ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217__srctree =
1218else
1219__srctree = $(srctree)/
1220endif
1221
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001222ifeq ($(ALLSOURCE_ARCHS),)
1223ifeq ($(ARCH),um)
1224ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1225else
1226ALLINCLUDE_ARCHS := $(ARCH)
1227endif
1228else
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001229#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001230ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1231endif
1232
Ian Campbella0674e82005-06-23 11:25:54 +01001233ALLSOURCE_ARCHS := $(ARCH)
1234
Masatake YAMATOe838db62006-06-22 12:21:20 +09001235define find-sources
1236 ( find $(__srctree) $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 \( -name include -o -name arch \) -prune -o \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001238 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001239 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1240 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001241 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001242 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001244 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 find $(__srctree)include $(RCS_FIND_IGNORE) \
1246 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001247 -o -name $1 -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001248 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001249 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001250 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001251 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001253 -name $1 -print )
1254endef
1255
1256define all-sources
1257 $(call find-sources,'*.[chS]')
1258endef
1259define all-kconfigs
1260 $(call find-sources,'Kconfig*')
1261endef
1262define all-defconfigs
1263 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264endef
1265
1266quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001267 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268
1269quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001270 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271
1272cscope: FORCE
1273 $(call cmd,cscope-file)
1274 $(call cmd,cscope)
1275
1276quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001277define cmd_TAGS
1278 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001279 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1280 echo "-I __initdata,__exitdata,__acquires,__releases \
1281 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1282 --extra=+f --c-kinds=+px"`; \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001283 $(all-sources) | xargs etags $$ETAGSF -a; \
1284 if test "x$$ETAGSF" = x; then \
1285 $(all-kconfigs) | xargs etags -a \
1286 --regex='/^config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1287 $(all-defconfigs) | xargs etags -a \
1288 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1289 fi
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001290endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001292TAGS: FORCE
1293 $(call cmd,TAGS)
1294
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295
1296quiet_cmd_tags = MAKE $@
1297define cmd_tags
1298 rm -f $@; \
Samuel Thibault54e08a22005-12-26 02:47:18 +01001299 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1300 echo "-I __initdata,__exitdata,__acquires,__releases \
1301 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1302 --extra=+f --c-kinds=+px"`; \
John Kacurf6333eb2005-10-29 00:25:13 -04001303 $(all-sources) | xargs ctags $$CTAGSF -a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304endef
1305
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306tags: FORCE
1307 $(call cmd,tags)
1308
1309
1310# Scripts to check various things for consistency
1311# ---------------------------------------------------------------------------
1312
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313includecheck:
1314 find * $(RCS_FIND_IGNORE) \
1315 -name '*.[hcS]' -type f -print | sort \
1316 | xargs $(PERL) -w scripts/checkincludes.pl
1317
1318versioncheck:
1319 find * $(RCS_FIND_IGNORE) \
1320 -name '*.[hcS]' -type f -print | sort \
1321 | xargs $(PERL) -w scripts/checkversion.pl
1322
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323namespacecheck:
1324 $(PERL) $(srctree)/scripts/namespace.pl
1325
1326endif #ifeq ($(config-targets),1)
1327endif #ifeq ($(mixed-targets),1)
1328
Roman Zippelc30a02e2006-06-08 22:12:50 -07001329PHONY += checkstack kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330checkstack:
1331 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1332 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1333
1334kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001335 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1336 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001337kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001338 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339
Sam Ravnborg06300b22006-01-25 07:13:18 +01001340# Single targets
1341# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001342# Single targets are compatible with:
1343# - build whith mixed source and output
1344# - build with separate output dir 'make O=...'
1345# - external modules
1346#
1347# target-dir => where to store outputfile
1348# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001349
Sam Ravnborg06300b22006-01-25 07:13:18 +01001350ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001351 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001352 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001353else
1354 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001355 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1356 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001357endif
1358
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001359%.s: %.c prepare scripts FORCE
1360 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1361%.i: %.c prepare scripts FORCE
1362 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1363%.o: %.c prepare scripts FORCE
1364 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1365%.lst: %.c prepare scripts FORCE
1366 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1367%.s: %.S prepare scripts FORCE
1368 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1369%.o: %.S prepare scripts FORCE
1370 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001371%.symtypes: %.c prepare scripts FORCE
1372 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001373
1374# Modules
1375/ %/: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001376 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001377 $(build)=$(build-dir)
1378%.ko: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001379 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001380 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001381 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1382
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383# FIXME Should go into a make.lib or something
1384# ===========================================================================
1385
1386quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1387 cmd_rmdirs = rm -rf $(rm-dirs)
1388
1389quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1390 cmd_rmfiles = rm -f $(rm-files)
1391
1392
1393a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1394 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001395 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396
1397quiet_cmd_as_o_S = AS $@
1398cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1399
1400# read all saved command lines
1401
1402targets := $(wildcard $(sort $(targets)))
1403cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1404
1405ifneq ($(cmd_files),)
1406 $(cmd_files): ; # Do not try to update included dependency files
1407 include $(cmd_files)
1408endif
1409
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1411# Usage:
1412# $(Q)$(MAKE) $(clean)=dir
1413clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1414
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415endif # skip-makefile
1416
Paul Smith4f193362006-03-05 17:14:10 -05001417PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001419
1420
1421# Declare the contents of the .PHONY variable as phony. We keep that
1422# information in a variable se we can use it in if_changed and friends.
1423.PHONY: $(PHONY)