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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldscc016442006-12-13 17:14:23 -08003SUBLEVEL = 20
Linus Torvalds62d0cfc2007-02-04 10:44:54 -08004EXTRAVERSION =
Linus Torvalds3bf8ba32006-12-23 20:00:32 -08005NAME = Homicidal Dwarf Hamster
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
Oleg Verych15964862006-12-10 02:18:40 -080013# Do not:
14# o use make's built-in rules and variables
15# (this increases performance and avoid hard-to-debug behavour);
16# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19# We are using a recursive build, so we need to do a little thinking
20# to get the ordering right.
21#
22# Most importantly: sub-Makefiles should only ever modify files in
23# their own directory. If in some directory we have a dependency on
24# a file in another dir (which doesn't happen often, but it's often
25# unavoidable when linking the built-in.o targets which finally
26# turn into vmlinux), we will call a sub make in that other dir, and
27# after that we are sure that everything which is in that other dir
28# is now up to date.
29#
30# The only cases where we need to modify files which have global
31# effects are thus separated out and done before the recursive
32# descending is started. They are now explicitly listed as the
33# prepare rule.
34
35# To put more focus on warnings, be less verbose as default
36# Use 'make V=1' to see the full commands
37
38ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42endif
43ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45endif
46
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040047# Call a source code checker (by default, "sparse") as part of the
48# C compilation.
49#
50# Use 'make C=1' to enable checking of only re-compiled files.
51# Use 'make C=2' to enable checking of *all* source files, regardless
52# of whether they are re-compiled or not.
53#
54# See the file "Documentation/sparse.txt" for more details, including
55# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61endif
62ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64endif
65
66# Use make M=dir to specify directory of external module to build
67# Old syntax make ... SUBDIRS=$PWD is still supported
68# Setting the environment variable KBUILD_EXTMOD take precedence
69ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71endif
72ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76endif
77
78
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020084#
Linus Torvalds1da177e2005-04-16 15:20:36 -070085# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(KBUILD_SRC),)
98
99# OK, Make called in directory where kernel src resides
100# Do we want to locate output files in a separate directory?
101ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500108PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109_all:
110
111ifneq ($(KBUILD_OUTPUT),)
112# Invoke a second make in the output directory, passing relevant variables
113# check that the output directory actually exists
114saved-output := $(KBUILD_OUTPUT)
115KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
116$(if $(KBUILD_OUTPUT),, \
117 $(error output directory "$(saved-output)" does not exist))
118
Paul Smith4f193362006-03-05 17:14:10 -0500119PHONY += $(MAKECMDGOALS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800121$(filter-out _all,$(MAKECMDGOALS)) _all:
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200122 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
123 KBUILD_SRC=$(CURDIR) \
Benjamin LaHaise36cbbe52006-02-15 15:17:35 -0800124 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
126# Leave processing to above invocation of make
127skip-makefile := 1
128endif # ifneq ($(KBUILD_OUTPUT),)
129endif # ifeq ($(KBUILD_SRC),)
130
131# We process the rest of the Makefile if this is the final invocation of make
132ifeq ($(skip-makefile),)
133
134# If building an external module we do not care about the all: rule
135# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500136PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137ifeq ($(KBUILD_EXTMOD),)
138_all: all
139else
140_all: modules
141endif
142
143srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
144TOPDIR := $(srctree)
145# FIXME - TOPDIR is obsolete, use srctree/objtree
146objtree := $(CURDIR)
147src := $(srctree)
148obj := $(objtree)
149
Mattia Dongili0f558c32006-02-19 13:50:37 +0100150VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152export srctree objtree VPATH TOPDIR
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155# SUBARCH tells the usermode build what the underlying arch is. That is set
156# first, and if a usermode build is happening, the "ARCH=um" on the command
157# line overrides the setting of ARCH below. If a native build is happening,
158# then ARCH is assigned, getting whatever value it gets normally, and
159# SUBARCH is subsequently ignored.
160
161SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
162 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800163 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Martin Michlmayr89992572006-01-28 18:38:15 +0000164 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166# Cross compiling and selecting different set of gcc/bin-utils
167# ---------------------------------------------------------------------------
168#
169# When performing cross compilation for other architectures ARCH shall be set
170# to the target architecture. (See arch/* for the possibilities).
171# ARCH can be set during invocation of make:
172# make ARCH=ia64
173# Another way is to have ARCH set in the environment.
174# The default ARCH is the host where make is executed.
175
176# CROSS_COMPILE specify the prefix used for all executables used
177# during compilation. Only gcc and related bin-utils executables
178# are prefixed with $(CROSS_COMPILE).
179# CROSS_COMPILE can be set on the command line
180# make CROSS_COMPILE=ia64-linux-
181# Alternatively CROSS_COMPILE can be set in the environment.
182# Default value for CROSS_COMPILE is not to prefix executables
183# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
184
185ARCH ?= $(SUBARCH)
186CROSS_COMPILE ?=
187
188# Architecture as present in compile.h
189UTS_MACHINE := $(ARCH)
190
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700191KCONFIG_CONFIG ?= .config
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193# SHELL used by kbuild
194CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
195 else if [ -x /bin/bash ]; then echo /bin/bash; \
196 else echo sh; fi ; fi)
197
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200198HOSTCC = gcc
199HOSTCXX = g++
200HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
201HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200203# Decide whether to build built-in, modular, or both.
204# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206KBUILD_MODULES :=
207KBUILD_BUILTIN := 1
208
209# If we have only "make modules", don't compile built-in objects.
210# When we're building modules with modversions, we need to consider
211# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200212# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
214ifeq ($(MAKECMDGOALS),modules)
215 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
216endif
217
218# If we have "make <whatever> modules", compile modules
219# in addition to whatever we do anyway.
220# Just "make" or "make all" shall build modules as well
221
222ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
223 KBUILD_MODULES := 1
224endif
225
226ifeq ($(MAKECMDGOALS),)
227 KBUILD_MODULES := 1
228endif
229
Sam Ravnborge579d352005-07-27 08:10:10 +0200230export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
232
233# Beautify output
234# ---------------------------------------------------------------------------
235#
236# Normally, we echo the whole command before executing it. By making
237# that echo $($(quiet)$(cmd)), we now have the possibility to set
238# $(quiet) to choose other forms of output instead, e.g.
239#
240# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
241# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
242#
243# If $(quiet) is empty, the whole command will be printed.
244# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200245# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246# the variable $(silent_cmd_cc_o_c) doesn't exist.
247#
Adrian Bunka58a4142006-01-10 00:08:17 +0100248# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249# for commands that shall be hidden in non-verbose mode.
250#
251# $(Q)ln $@ :<
252#
253# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
254# If KBUILD_VERBOSE equals 1 then the above command is displayed.
255
256ifeq ($(KBUILD_VERBOSE),1)
257 quiet =
258 Q =
259else
260 quiet=quiet_
261 Q = @
262endif
263
264# If the user is running make -s (silent mode), suppress echoing of
265# commands
266
267ifneq ($(findstring s,$(MAKEFLAGS)),)
268 quiet=silent_
269endif
270
271export quiet Q KBUILD_VERBOSE
272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
274# Look for make include files relative to root of kernel src
275MAKEFLAGS += --include-dir=$(srctree)
276
Oleg Verych15964862006-12-10 02:18:40 -0800277# We need some generic definitions.
278include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
280# Make variables (CC, etc...)
281
282AS = $(CROSS_COMPILE)as
283LD = $(CROSS_COMPILE)ld
284CC = $(CROSS_COMPILE)gcc
285CPP = $(CC) -E
286AR = $(CROSS_COMPILE)ar
287NM = $(CROSS_COMPILE)nm
288STRIP = $(CROSS_COMPILE)strip
289OBJCOPY = $(CROSS_COMPILE)objcopy
290OBJDUMP = $(CROSS_COMPILE)objdump
291AWK = awk
292GENKSYMS = scripts/genksyms/genksyms
293DEPMOD = /sbin/depmod
294KALLSYMS = scripts/kallsyms
295PERL = perl
296CHECK = sparse
297
Al Viroaf4ca452005-10-21 02:55:38 -0400298CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299MODFLAGS = -DMODULE
300CFLAGS_MODULE = $(MODFLAGS)
301AFLAGS_MODULE = $(MODFLAGS)
302LDFLAGS_MODULE = -r
303CFLAGS_KERNEL =
304AFLAGS_KERNEL =
305
306
307# Use LINUXINCLUDE when you must reference the include/ directory.
308# Needed to be compatible with the O= option
309LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100310 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800311 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
313CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
314
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200315CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
316 -fno-strict-aliasing -fno-common
317AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700319# Read KERNELRELEASE from include/config/kernel.release (if it exists)
320KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100321KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100322
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200323export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
324export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
325export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
326export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
328export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200329export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
331
332# When compiling out-of-tree modules, put MODVERDIR in the module
333# tree rather than in the kernel tree. The kernel tree might
334# even be read-only.
335export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
336
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337# Files to ignore in find ... statements
338
Trond Myklebust406119f2005-10-27 14:46:53 -0400339RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
340export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
342# ===========================================================================
343# Rules shared between *config targets and build targets
344
345# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500346PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347scripts_basic:
348 $(Q)$(MAKE) $(build)=scripts/basic
349
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200350# To avoid any implicit rule to kick in, define an empty command.
351scripts/basic/%: scripts_basic ;
352
Paul Smith4f193362006-03-05 17:14:10 -0500353PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200354# outputmakefile generates a Makefile in the output directory, if using a
355# separate output directory. This allows convenient use of make in the
356# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200358ifneq ($(KBUILD_SRC),)
359 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
360 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
361endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
363# To make sure we do not include .config for any of the *config targets
364# catch them early, and hand them over to scripts/kconfig/Makefile
365# It is allowed to specify more targets when calling make, including
366# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200367# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368# Detect when mixed targets is specified, and make a second invocation
369# of make so .config is not included in this case either (for *config).
370
Roman Zippel3eb3c742007-01-10 14:45:28 +0100371no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700372 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100373 include/linux/version.h headers_% \
374 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
376config-targets := 0
377mixed-targets := 0
378dot-config := 1
379
380ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
381 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
382 dot-config := 0
383 endif
384endif
385
386ifeq ($(KBUILD_EXTMOD),)
387 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
388 config-targets := 1
389 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
390 mixed-targets := 1
391 endif
392 endif
393endif
394
395ifeq ($(mixed-targets),1)
396# ===========================================================================
397# We're called with mixed targets (*config and build targets).
398# Handle them one by one.
399
400%:: FORCE
401 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
402
403else
404ifeq ($(config-targets),1)
405# ===========================================================================
406# *config targets only - make sure prerequisites are updated, and descend
407# in scripts/kconfig to make the *config target
408
409# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
410# KBUILD_DEFCONFIG may point out an alternative default configuration
411# used for 'make defconfig'
412include $(srctree)/arch/$(ARCH)/Makefile
413export KBUILD_DEFCONFIG
414
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200415config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700416 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 $(Q)$(MAKE) $(build)=scripts/kconfig $@
418
419else
420# ===========================================================================
421# Build targets only - this includes vmlinux, arch specific targets, clean
422# targets and others. In general all targets except *config targets.
423
424ifeq ($(KBUILD_EXTMOD),)
425# Additional helpers built in scripts/
426# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200427# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500428PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700429scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 $(Q)$(MAKE) $(build)=$(@)
431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432# Objects we will link into vmlinux / subdirs we need to visit
433init-y := init/
434drivers-y := drivers/ sound/
435net-y := net/
436libs-y := lib/
437core-y := usr/
438endif # KBUILD_EXTMOD
439
440ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200441# Read in config
442-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200444ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445# Read in dependencies to all Kconfig* files, make sure to run
446# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700447-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700450$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
Roman Zippelc955cca2006-06-08 22:12:39 -0700452# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100453# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200454# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100455# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700456include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
458else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200459# external modules needs include/linux/autoconf.h and include/config/auto.conf
460# but do not care if they are up-to-date. Use auto.conf to trigger the test
461PHONY += include/config/auto.conf
462
463include/config/auto.conf:
464 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
465 echo; \
466 echo " ERROR: Kernel configuration is invalid."; \
467 echo " include/linux/autoconf.h or $@ are missing."; \
468 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
469 echo; \
470 /bin/false)
471
472endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474else
475# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700476include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200477endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
479# The all: target is the default when no target is given on the
480# command line.
481# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200482# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483all: vmlinux
484
485ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
486CFLAGS += -Os
487else
488CFLAGS += -O2
489endif
490
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200491include $(srctree)/arch/$(ARCH)/Makefile
492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493ifdef CONFIG_FRAME_POINTER
Matthias Urlichs0030cbf2005-06-23 00:10:05 -0700494CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495else
496CFLAGS += -fomit-frame-pointer
497endif
498
499ifdef CONFIG_DEBUG_INFO
500CFLAGS += -g
501endif
502
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200503# Force gcc to behave correct even for buggy distributions
504CFLAGS += $(call cc-option, -fno-stack-protector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
Sam Ravnborge8e69932005-04-30 16:51:42 -0700506# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700507NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700508CHECKFLAGS += $(NOSTDINC_FLAGS)
509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510# warn about C99 declaration after statement
511CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
512
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200513# disable pointer signed / unsigned warnings in gcc 4.0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514CFLAGS += $(call cc-option,-Wno-pointer-sign,)
515
516# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200517# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518# set in the environment
519# Also any assignments in arch/$(ARCH)/Makefile take precedence over
520# this default value
521export KBUILD_IMAGE ?= vmlinux
522
523#
524# INSTALL_PATH specifies where to place the updated kernel and system map
525# images. Default is /boot, but you can set it to other values
526export INSTALL_PATH ?= /boot
527
528#
529# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
530# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200531# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532#
533
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100534MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535export MODLIB
536
Theodore Ts'oac031f22006-06-21 20:53:09 -0400537#
538# INSTALL_MOD_STRIP, if defined, will cause modules to be
539# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
540# the default option --strip-debug will be used. Otherwise,
541# INSTALL_MOD_STRIP will used as the options to the strip command.
542
543ifdef INSTALL_MOD_STRIP
544ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200545mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400546else
547mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
548endif # INSTALL_MOD_STRIP=1
549else
550mod_strip_cmd = true
551endif # INSTALL_MOD_STRIP
552export mod_strip_cmd
553
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554
555ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100556core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
559 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
560 $(net-y) $(net-m) $(libs-y) $(libs-m)))
561
562vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
563 $(init-n) $(init-) \
564 $(core-n) $(core-) $(drivers-n) $(drivers-) \
565 $(net-n) $(net-) $(libs-n) $(libs-))))
566
567init-y := $(patsubst %/, %/built-in.o, $(init-y))
568core-y := $(patsubst %/, %/built-in.o, $(core-y))
569drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
570net-y := $(patsubst %/, %/built-in.o, $(net-y))
571libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
572libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
573libs-y := $(libs-y1) $(libs-y2)
574
575# Build vmlinux
576# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200577# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578# $(vmlinux-main). Most are built-in.o files from top-level directories
579# in the kernel tree, others are specified in arch/$(ARCH)Makefile.
580# Ordering when linking is important, and $(vmlinux-init) must be first.
581#
582# vmlinux
583# ^
584# |
585# +-< $(vmlinux-init)
586# | +--< init/version.o + more
587# |
588# +--< $(vmlinux-main)
589# | +--< driver/built-in.o mm/built-in.o + more
590# |
591# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
592#
593# vmlinux version (uname -v) cannot be updated during normal
594# descending-into-subdirs phase since we do not yet know if we need to
595# update vmlinux.
596# Therefore this step is delayed until just before final link of vmlinux -
597# except in the kallsyms case where it is done just before adding the
598# symbols to the kernel.
599#
600# System.map is generated to document addresses of all kernel symbols
601
602vmlinux-init := $(head-y) $(init-y)
603vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
604vmlinux-all := $(vmlinux-init) $(vmlinux-main)
605vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
606
607# Rule to link vmlinux - also used during CONFIG_KALLSYMS
608# May be overridden by arch/$(ARCH)/Makefile
609quiet_cmd_vmlinux__ ?= LD $@
610 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
611 -T $(vmlinux-lds) $(vmlinux-init) \
612 --start-group $(vmlinux-main) --end-group \
613 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
614
615# Generate new vmlinux version
616quiet_cmd_vmlinux_version = GEN .version
617 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200618 if [ ! -r .version ]; then \
619 rm -f .version; \
620 echo 1 >.version; \
621 else \
622 mv .version .old_version; \
623 expr 0$$(cat .old_version) + 1 >.version; \
624 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 $(MAKE) $(build)=init
626
627# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200628quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
630
631# Link of vmlinux
632# If CONFIG_KALLSYMS is set .version is already updated
633# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700634# Use + in front of the vmlinux_version rule to silent warning with make -j2
635# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700637 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
639
640 $(call cmd,vmlinux__)
641 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
642
Sam Ravnborg46352812006-08-08 21:41:18 +0200643 $(Q)$(if $($(quiet)cmd_sysmap), \
644 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
645 $(cmd_sysmap) $@ System.map; \
646 if [ $$? -ne 0 ]; then \
647 rm -f $@; \
648 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 fi;
650 $(verify_kallsyms)
651endef
652
653
654ifdef CONFIG_KALLSYMS
655# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
656# It's a three stage process:
657# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
658# empty
659# Running kallsyms on that gives us .tmp_kallsyms1.o with
660# the right size - vmlinux version (uname -v) is updated during this step
661# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
662# but due to the added section, some addresses have shifted.
663# From here, we generate a correct .tmp_kallsyms2.o
664# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
665# o Verify that the System.map from vmlinux matches the map from
666# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
667# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
668# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
669# temporary bypass to allow the kernel to be built while the
670# maintainers work out what went wrong with kallsyms.
671
672ifdef CONFIG_KALLSYMS_EXTRA_PASS
673last_kallsyms := 3
674else
675last_kallsyms := 2
676endif
677
678kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
679
680define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200681 $(Q)$(if $($(quiet)cmd_sysmap), \
682 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200684 $(Q)cmp -s System.map .tmp_System.map || \
685 (echo Inconsistent kallsyms data; \
686 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 rm .tmp_kallsyms* ; /bin/false )
688endef
689
690# Update vmlinux version before link
691# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200692# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693cmd_ksym_ld = $(cmd_vmlinux__)
694define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200695 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 +$(call cmd,vmlinux_version)
697 $(call cmd,vmlinux__)
698 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
699endef
700
701# Generate .S file with all kernel symbols
702quiet_cmd_kallsyms = KSYM $@
703 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
704 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
705
706.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
707 $(call if_changed_dep,as_o_S)
708
709.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
710 $(call cmd,kallsyms)
711
712# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
713.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
714 $(call if_changed_rule,ksym_ld)
715
716.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
717 $(call if_changed,vmlinux__)
718
719.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
720 $(call if_changed,vmlinux__)
721
722# Needs to visit scripts/ before $(KALLSYMS) can be used.
723$(KALLSYMS): scripts ;
724
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000725# Generate some data for debugging strange kallsyms problems
726debug_kallsyms: .tmp_map$(last_kallsyms)
727
728.tmp_map%: .tmp_vmlinux% FORCE
729 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
730
731.tmp_map3: .tmp_map2
732
733.tmp_map2: .tmp_map1
734
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735endif # ifdef CONFIG_KALLSYMS
736
737# vmlinux image - including updated kernel symbols
738vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700739ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100740 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700741endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 $(call if_changed_rule,vmlinux__)
Sam Ravnborg12715d22006-08-08 20:43:39 +0200743 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200744 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
746# The actual objects are generated when descending,
747# make sure no implicit rule kicks in
748$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
749
750# Handle descending into subdirectories listed in $(vmlinux-dirs)
751# Preset locale variables to speed up the build process. Limit locale
752# tweaks to this spot to avoid wrong language settings when running
753# make menuconfig etc.
754# Error messages still appears in the original language
755
Paul Smith4f193362006-03-05 17:14:10 -0500756PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200757$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 $(Q)$(MAKE) $(build)=$@
759
Sam Ravnborgcb584552006-01-09 21:20:34 +0100760# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100761#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400762# The KERNELRELEASE value built here is stored in the file
763# include/config/kernel.release, and is used when executing several
764# make targets, such as "make install" or "make modules_install."
765#
766# The eventual kernel release string consists of the following fields,
767# shown in a hierarchical format to show how smaller parts are concatenated
768# to form the larger and final value, with values coming from places like
769# the Makefile, kernel config options, make command line options and/or
770# SCM tag information.
771#
772# $(KERNELVERSION)
773# $(VERSION) eg, 2
774# $(PATCHLEVEL) eg, 6
775# $(SUBLEVEL) eg, 18
776# $(EXTRAVERSION) eg, -rc6
777# $(localver-full)
778# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100779# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400780# $(CONFIG_LOCALVERSION) (from kernel config setting)
781# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
782# ./scripts/setlocalversion (SCM tag, if one exists)
783# $(LOCALVERSION) (from make command line if provided)
784#
785# Note how the final $(localver-auto) string is included *only* if the
786# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
787# moment, only git is supported but other SCMs can edit the script
788# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100789
Oleg Verych76c32952007-02-06 02:18:22 +0100790pattern = ".*/localversion[^~]*"
791string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800792 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100793
Oleg Verych76c32952007-02-06 02:18:22 +0100794localver = $(subst $(space),, $(string) \
795 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200796
Sam Ravnborgcb584552006-01-09 21:20:34 +0100797# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
798# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200799# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100800#
801# Currently, only git is supported.
802# Other SCMs can edit scripts/setlocalversion and add the appropriate
803# checks as needed.
804ifdef CONFIG_LOCALVERSION_AUTO
805 _localver-auto = $(shell $(CONFIG_SHELL) \
806 $(srctree)/scripts/setlocalversion $(srctree))
807 localver-auto = $(LOCALVERSION)$(_localver-auto)
808endif
809
810localver-full = $(localver)$(localver-auto)
811
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700812# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100813kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700814include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100815 $(Q)rm -f $@
816 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100817
818
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200820# or the modules are listed in "prepare".
821# A multi level approach is used. prepareN is processed before prepareN-1.
822# archprepare is used in arch Makefiles and when processed asm symlink,
823# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200825# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500826PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200827
828# prepare-all is deprecated, use prepare as valid replacement
Paul Smith4f193362006-03-05 17:14:10 -0500829PHONY += prepare-all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200831# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832# and if so do:
833# 1) Check that make has not been executed in the kernel src $(srctree)
834# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700835prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836ifneq ($(KBUILD_SRC),)
837 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700838 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 echo " $(srctree) is not clean, please run 'make mrproper'";\
840 echo " in the '$(srctree)' directory.";\
841 /bin/false; \
842 fi;
843 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
844 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
845endif
846
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200847# prepare2 creates a makefile if using a separate output directory
848prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
Roman Zippel3eb3c742007-01-10 14:45:28 +0100850prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
851 include/asm include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852ifneq ($(KBUILD_MODULES),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -0400854 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855endif
856
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200857archprepare: prepare1 scripts_basic
858
859prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200860 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200861
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862# All the preparing..
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200863prepare prepare-all: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200865# Leave this as default for preprocessing vmlinux.lds.S, which is now
866# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867
868export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
869
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200870# FIXME: The asm symlink changes when $(ARCH) changes. That's
871# hard to detect, but I suppose "make mrproper" is a good idea
872# before switching between archs anyway.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873
874include/asm:
875 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
876 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
877 @ln -fsn asm-$(ARCH) $@
878
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879# Generate some files
880# ---------------------------------------------------------------------------
881
882# KERNELRELEASE can change from a few different places, meaning version.h
883# needs to be updated, so this check is forced on all builds
884
885uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200886define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200888 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
889 exit 1; \
890 fi; \
891 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892endef
893
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200894define filechk_version.h
895 (echo \#define LINUX_VERSION_CODE $(shell \
896 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
897 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
898endef
899
900include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 $(call filechk,version.h)
902
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200903include/linux/utsrelease.h: include/config/kernel.release FORCE
904 $(call filechk,utsrelease.h)
905
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906# ---------------------------------------------------------------------------
907
Paul Smith4f193362006-03-05 17:14:10 -0500908PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909depend dep:
910 @echo '*** Warning: make $@ is unnecessary now.'
911
912# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100913# Kernel headers
David Woodhouse1ab7a1f2006-09-16 12:15:55 -0700914INSTALL_HDR_PATH=$(objtree)/usr
David Woodhouse8d730cf2006-06-18 11:58:39 +0100915export INSTALL_HDR_PATH
916
David Woodhouse6d716272006-09-24 22:16:03 +0100917HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
918
919PHONY += headers_install_all
Roman Zippel3eb3c742007-01-10 14:45:28 +0100920headers_install_all: include/linux/version.h scripts_basic FORCE
Linus Torvalds398477d2006-09-24 14:55:52 -0700921 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100922 $(Q)for arch in $(HDRARCHES); do \
Linus Torvalds398477d2006-09-24 14:55:52 -0700923 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
David Woodhouse6d716272006-09-24 22:16:03 +0100924 done
925
David Woodhouse8d730cf2006-06-18 11:58:39 +0100926PHONY += headers_install
Roman Zippel3eb3c742007-01-10 14:45:28 +0100927headers_install: include/linux/version.h scripts_basic FORCE
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100928 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +0100929 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
930 exit 1 ; fi
Sam Ravnborg07aea3a2006-07-23 20:47:50 +0200931 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200932 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
David Woodhouse8d730cf2006-06-18 11:58:39 +0100933
David Woodhouse68475352006-06-18 12:02:10 +0100934PHONY += headers_check
935headers_check: headers_install
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200936 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +0100937
David Woodhouse8d730cf2006-06-18 11:58:39 +0100938# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939# Modules
940
941ifdef CONFIG_MODULES
942
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200943# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
945all: modules
946
947# Build modules
948
Paul Smith4f193362006-03-05 17:14:10 -0500949PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
951 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200952 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953
954
955# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500956PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200957modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958
959# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500960PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961modules_install: _modinst_ _modinst_post
962
Paul Smith4f193362006-03-05 17:14:10 -0500963PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700965 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 echo "Warning: you may need to install module-init-tools"; \
967 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
968 sleep 1; \
969 fi
970 @rm -rf $(MODLIB)/kernel
971 @rm -f $(MODLIB)/source
972 @mkdir -p $(MODLIB)/kernel
973 @ln -s $(srctree) $(MODLIB)/source
974 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
975 rm -f $(MODLIB)/build ; \
976 ln -s $(objtree) $(MODLIB)/build ; \
977 fi
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200978 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979
980# If System.map exists, run depmod. This deliberately does not have a
981# dependency on System.map since that would run the dependency tree on
982# vmlinux. This depmod is only for convenience to give the initial
983# boot a modules.dep even before / is mounted read-write. However the
984# boot script depmod is the master version.
985ifeq "$(strip $(INSTALL_MOD_PATH))" ""
986depmod_opts :=
987else
988depmod_opts := -b $(INSTALL_MOD_PATH) -r
989endif
Paul Smith4f193362006-03-05 17:14:10 -0500990PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991_modinst_post: _modinst_
992 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
993
994else # CONFIG_MODULES
995
996# Modules not configured
997# ---------------------------------------------------------------------------
998
999modules modules_install: FORCE
1000 @echo
1001 @echo "The present kernel configuration has modules disabled."
1002 @echo "Type 'make config' and enable loadable module support."
1003 @echo "Then build a kernel with module support enabled."
1004 @echo
1005 @exit 1
1006
1007endif # CONFIG_MODULES
1008
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009###
1010# Cleaning is done on three levels.
1011# make clean Delete most generated files
1012# Leave enough to build external modules
1013# make mrproper Delete the current configuration, and all generated files
1014# make distclean Remove editor backup files, patch leftover files and the like
1015
1016# Directories & files removed with 'make clean'
1017CLEAN_DIRS += $(MODVERDIR)
1018CLEAN_FILES += vmlinux System.map \
1019 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1020
1021# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f2006-09-16 12:15:55 -07001022MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001023MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001024 include/linux/autoconf.h include/linux/version.h \
1025 include/linux/utsrelease.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001026 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027
1028# clean - Delete most, but leave enough to build external modules
1029#
1030clean: rm-dirs := $(CLEAN_DIRS)
1031clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001032clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
Paul Smith4f193362006-03-05 17:14:10 -05001034PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035$(clean-dirs):
1036 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1037
1038clean: archclean $(clean-dirs)
1039 $(call cmd,rmdirs)
1040 $(call cmd,rmfiles)
1041 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001042 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001043 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1044 -o -name '*.symtypes' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 -type f -print | xargs rm -f
1046
1047# mrproper - Delete all generated files, including .config
1048#
1049mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1050mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1051mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1052
Paul Smith4f193362006-03-05 17:14:10 -05001053PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054$(mrproper-dirs):
1055 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1056
1057mrproper: clean archmrproper $(mrproper-dirs)
1058 $(call cmd,rmdirs)
1059 $(call cmd,rmfiles)
1060
1061# distclean
1062#
Paul Smith4f193362006-03-05 17:14:10 -05001063PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064
1065distclean: mrproper
1066 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001067 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001069 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1071 -type f -print | xargs rm -f
1072
1073
1074# Packaging of the kernel to various formats
1075# ---------------------------------------------------------------------------
1076# rpm target kept for backward compatibility
1077package-dir := $(srctree)/scripts/package
1078
Zach Brown031ecc62006-06-08 22:12:37 -07001079%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001080 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001081rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001082 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
1084
1085# Brief documentation of the typical targets used
1086# ---------------------------------------------------------------------------
1087
1088boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1089boards := $(notdir $(boards))
1090
1091help:
1092 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001093 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001094 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001095 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001096 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 @echo ''
1098 @echo 'Configuration targets:'
1099 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1100 @echo ''
1101 @echo 'Other generic targets:'
1102 @echo ' all - Build all targets marked with [*]'
1103 @echo '* vmlinux - Build the bare kernel'
1104 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001105 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 @echo ' dir/ - Build all files in dir and below'
1107 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001108 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 @echo ' rpm - Build a kernel as an RPM package'
1110 @echo ' tags/TAGS - Generate tags file for editors'
1111 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001112 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001113 @echo ' kernelversion - Output the version stored in Makefile'
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001114 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001115 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001116 echo ' (default: $(INSTALL_HDR_PATH))'; \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001117 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 @echo ''
1119 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 @echo ' checkstack - Generate a list of stack hogs'
1121 @echo ' namespacecheck - Name space analysis on compiled kernel'
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001122 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001123 echo ' headers_check - Sanity check on exported headers'; \
1124 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 @echo ''
1126 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001127 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 @echo ''
1129 @echo 'Documentation targets:'
1130 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1131 @echo ''
1132 @echo 'Architecture specific targets ($(ARCH)):'
1133 @$(if $(archhelp),$(archhelp),\
1134 echo ' No architecture specific help defined for $(ARCH)')
1135 @echo ''
1136 @$(if $(boards), \
1137 $(foreach b, $(boards), \
1138 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1139 echo '')
1140
1141 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001142 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001144 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1145 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 @echo ''
1147 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1148 @echo 'For further info see the ./README file'
1149
1150
1151# Documentation targets
1152# ---------------------------------------------------------------------------
1153%docs: scripts_basic FORCE
1154 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1155
1156else # KBUILD_EXTMOD
1157
1158###
1159# External module support.
1160# When building external modules the kernel used as basis is considered
1161# read-only, and no consistency checks are made and the make
1162# system is not used on the basis kernel. If updates are required
1163# in the basis kernel ordinary make commands (without M=...) must
1164# be used.
1165#
1166# The following are the only valid targets when building external
1167# modules.
1168# make M=dir clean Delete all automatically generated files
1169# make M=dir modules Make all modules in specified dir
1170# make M=dir Same as 'make M=dir modules'
1171# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001172# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173# Assumes install directory is already created
1174
1175# We are always building modules
1176KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001177PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178crmodverdir:
1179 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -04001180 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181
Paul Smith4f193362006-03-05 17:14:10 -05001182PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183$(objtree)/Module.symvers:
1184 @test -e $(objtree)/Module.symvers || ( \
1185 echo; \
1186 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1187 echo " is missing; modules will have no dependencies and modversions."; \
1188 echo )
1189
1190module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001191PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192$(module-dirs): crmodverdir $(objtree)/Module.symvers
1193 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1194
1195modules: $(module-dirs)
1196 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001197 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198
Paul Smith4f193362006-03-05 17:14:10 -05001199PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001200modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001201
Paul Smith4f193362006-03-05 17:14:10 -05001202install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1203PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001204_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001205 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001206 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
Sam Ravnborga67dc212006-01-28 23:51:57 +01001208# Run depmod only is we have System.map and depmod is executable
1209quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1210 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1211 $(DEPMOD) -ae -F System.map \
1212 $(if $(strip $(INSTALL_MOD_PATH)), \
1213 -b $(INSTALL_MOD_PATH) -r) \
1214 $(KERNELRELEASE); \
1215 fi
1216
Paul Smith4f193362006-03-05 17:14:10 -05001217PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001218_emodinst_post: _emodinst_
1219 $(call cmd,depmod)
1220
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1222
Paul Smith4f193362006-03-05 17:14:10 -05001223PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224$(clean-dirs):
1225 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1226
1227clean: rm-dirs := $(MODVERDIR)
1228clean: $(clean-dirs)
1229 $(call cmd,rmdirs)
1230 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001231 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1233 -type f -print | xargs rm -f
1234
1235help:
1236 @echo ' Building external modules.'
1237 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1238 @echo ''
1239 @echo ' modules - default target, build the module(s)'
1240 @echo ' modules_install - install the module'
1241 @echo ' clean - remove generated files in module directory only'
1242 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001243
1244# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001245PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001246prepare: ;
1247scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248endif # KBUILD_EXTMOD
1249
1250# Generate tags for editors
1251# ---------------------------------------------------------------------------
1252
1253#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1254#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1255#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1256
George Anzingerf182ae62005-07-07 17:56:06 -07001257ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258__srctree =
1259else
1260__srctree = $(srctree)/
1261endif
1262
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001263ifeq ($(ALLSOURCE_ARCHS),)
1264ifeq ($(ARCH),um)
1265ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1266else
1267ALLINCLUDE_ARCHS := $(ARCH)
1268endif
1269else
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001270#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001271ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1272endif
1273
Ian Campbella0674e82005-06-23 11:25:54 +01001274ALLSOURCE_ARCHS := $(ARCH)
1275
Masatake YAMATOe838db62006-06-22 12:21:20 +09001276define find-sources
1277 ( find $(__srctree) $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 \( -name include -o -name arch \) -prune -o \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001279 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001280 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1281 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001282 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001283 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001285 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286 find $(__srctree)include $(RCS_FIND_IGNORE) \
1287 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001288 -o -name $1 -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001289 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001290 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001291 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001292 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001294 -name $1 -print )
1295endef
1296
1297define all-sources
1298 $(call find-sources,'*.[chS]')
1299endef
1300define all-kconfigs
1301 $(call find-sources,'Kconfig*')
1302endef
1303define all-defconfigs
1304 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305endef
1306
Aron Griffisda7c0402006-09-21 00:27:02 -04001307define xtags
1308 if $1 --version 2>&1 | grep -iq exuberant; then \
1309 $(all-sources) | xargs $1 -a \
1310 -I __initdata,__exitdata,__acquires,__releases \
1311 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
Aneesh Kumar K.V91b943e2006-10-17 00:10:32 -07001312 --extra=+f --c-kinds=+px \
1313 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001314 $(all-kconfigs) | xargs $1 -a \
1315 --langdef=kconfig \
1316 --language-force=kconfig \
1317 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001318 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001319 --langdef=dotconfig \
1320 --language-force=dotconfig \
1321 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1322 elif $1 --version 2>&1 | grep -iq emacs; then \
1323 $(all-sources) | xargs $1 -a; \
1324 $(all-kconfigs) | xargs $1 -a \
1325 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001326 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001327 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1328 else \
1329 $(all-sources) | xargs $1 -a; \
1330 fi
1331endef
1332
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001334 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335
1336quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001337 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338
1339cscope: FORCE
1340 $(call cmd,cscope-file)
1341 $(call cmd,cscope)
1342
1343quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001344define cmd_TAGS
1345 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001346 $(call xtags,etags)
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001347endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001349TAGS: FORCE
1350 $(call cmd,TAGS)
1351
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352quiet_cmd_tags = MAKE $@
1353define cmd_tags
1354 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001355 $(call xtags,ctags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356endef
1357
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358tags: FORCE
1359 $(call cmd,tags)
1360
1361
1362# Scripts to check various things for consistency
1363# ---------------------------------------------------------------------------
1364
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365includecheck:
1366 find * $(RCS_FIND_IGNORE) \
1367 -name '*.[hcS]' -type f -print | sort \
1368 | xargs $(PERL) -w scripts/checkincludes.pl
1369
1370versioncheck:
1371 find * $(RCS_FIND_IGNORE) \
1372 -name '*.[hcS]' -type f -print | sort \
1373 | xargs $(PERL) -w scripts/checkversion.pl
1374
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375namespacecheck:
1376 $(PERL) $(srctree)/scripts/namespace.pl
1377
1378endif #ifeq ($(config-targets),1)
1379endif #ifeq ($(mixed-targets),1)
1380
Roman Zippelc30a02e2006-06-08 22:12:50 -07001381PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001382
Jeff Dike011e3a92006-12-13 00:34:12 -08001383# UML needs a little special treatment here. It wants to use the host
1384# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1385# else wants $(ARCH), including people doing cross-builds, which means
1386# that $(SUBARCH) doesn't work here.
1387ifeq ($(ARCH), um)
1388CHECKSTACK_ARCH := $(SUBARCH)
1389else
1390CHECKSTACK_ARCH := $(ARCH)
1391endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392checkstack:
1393 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001394 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395
1396kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001397 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1398 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001399kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001400 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401
Sam Ravnborg06300b22006-01-25 07:13:18 +01001402# Single targets
1403# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001404# Single targets are compatible with:
1405# - build whith mixed source and output
1406# - build with separate output dir 'make O=...'
1407# - external modules
1408#
1409# target-dir => where to store outputfile
1410# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001411
Sam Ravnborg06300b22006-01-25 07:13:18 +01001412ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001413 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001414 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001415else
1416 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001417 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1418 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001419endif
1420
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001421%.s: %.c prepare scripts FORCE
1422 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1423%.i: %.c prepare scripts FORCE
1424 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1425%.o: %.c prepare scripts FORCE
1426 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1427%.lst: %.c prepare scripts FORCE
1428 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1429%.s: %.S prepare scripts FORCE
1430 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1431%.o: %.S prepare scripts FORCE
1432 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001433%.symtypes: %.c prepare scripts FORCE
1434 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001435
1436# Modules
1437/ %/: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001438 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001439 $(build)=$(build-dir)
1440%.ko: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001441 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001442 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001443 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001444
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445# FIXME Should go into a make.lib or something
1446# ===========================================================================
1447
1448quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1449 cmd_rmdirs = rm -rf $(rm-dirs)
1450
1451quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1452 cmd_rmfiles = rm -f $(rm-files)
1453
1454
1455a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1456 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001457 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
1459quiet_cmd_as_o_S = AS $@
1460cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1461
1462# read all saved command lines
1463
1464targets := $(wildcard $(sort $(targets)))
1465cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1466
1467ifneq ($(cmd_files),)
1468 $(cmd_files): ; # Do not try to update included dependency files
1469 include $(cmd_files)
1470endif
1471
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1473# Usage:
1474# $(Q)$(MAKE) $(clean)=dir
1475clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1476
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477endif # skip-makefile
1478
Paul Smith4f193362006-03-05 17:14:10 -05001479PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001481
Oleg Verych15964862006-12-10 02:18:40 -08001482# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1483Makefile: ;
Paul Smith4f193362006-03-05 17:14:10 -05001484
1485# Declare the contents of the .PHONY variable as phony. We keep that
1486# information in a variable se we can use it in if_changed and friends.
1487.PHONY: $(PHONY)