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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldsf695baf2007-07-22 13:41:00 -07003SUBLEVEL = 23
4EXTRAVERSION =-rc1
Linus Torvalds188e1f82007-06-16 19:09:12 -07005NAME = Holy Dancing Manatees, Batman!
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)
Roland McGrath114f5152007-07-23 01:12:08 -0700302LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303CFLAGS_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 \
Dave Jones94bed2a2007-07-15 23:41:38 -0700316 -fno-strict-aliasing -fno-common \
317 -Werror-implicit-function-declaration
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200318AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700320# Read KERNELRELEASE from include/config/kernel.release (if it exists)
321KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100322KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100323
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200324export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
325export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
326export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
327export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200330export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
332
333# When compiling out-of-tree modules, put MODVERDIR in the module
334# tree rather than in the kernel tree. The kernel tree might
335# even be read-only.
336export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338# Files to ignore in find ... statements
339
Trond Myklebust406119f2005-10-27 14:46:53 -0400340RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
341export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343# ===========================================================================
344# Rules shared between *config targets and build targets
345
346# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500347PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348scripts_basic:
349 $(Q)$(MAKE) $(build)=scripts/basic
350
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200351# To avoid any implicit rule to kick in, define an empty command.
352scripts/basic/%: scripts_basic ;
353
Paul Smith4f193362006-03-05 17:14:10 -0500354PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200355# outputmakefile generates a Makefile in the output directory, if using a
356# separate output directory. This allows convenient use of make in the
357# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200359ifneq ($(KBUILD_SRC),)
360 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
361 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
362endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
364# To make sure we do not include .config for any of the *config targets
365# catch them early, and hand them over to scripts/kconfig/Makefile
366# It is allowed to specify more targets when calling make, including
367# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200368# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369# Detect when mixed targets is specified, and make a second invocation
370# of make so .config is not included in this case either (for *config).
371
Roman Zippel3eb3c742007-01-10 14:45:28 +0100372no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700373 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100374 include/linux/version.h headers_% \
375 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
377config-targets := 0
378mixed-targets := 0
379dot-config := 1
380
381ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
382 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
383 dot-config := 0
384 endif
385endif
386
387ifeq ($(KBUILD_EXTMOD),)
388 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
389 config-targets := 1
390 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
391 mixed-targets := 1
392 endif
393 endif
394endif
395
396ifeq ($(mixed-targets),1)
397# ===========================================================================
398# We're called with mixed targets (*config and build targets).
399# Handle them one by one.
400
401%:: FORCE
402 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
403
404else
405ifeq ($(config-targets),1)
406# ===========================================================================
407# *config targets only - make sure prerequisites are updated, and descend
408# in scripts/kconfig to make the *config target
409
410# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
411# KBUILD_DEFCONFIG may point out an alternative default configuration
412# used for 'make defconfig'
413include $(srctree)/arch/$(ARCH)/Makefile
414export KBUILD_DEFCONFIG
415
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200416config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700417 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 $(Q)$(MAKE) $(build)=scripts/kconfig $@
419
420else
421# ===========================================================================
422# Build targets only - this includes vmlinux, arch specific targets, clean
423# targets and others. In general all targets except *config targets.
424
425ifeq ($(KBUILD_EXTMOD),)
426# Additional helpers built in scripts/
427# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200428# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500429PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700430scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 $(Q)$(MAKE) $(build)=$(@)
432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433# Objects we will link into vmlinux / subdirs we need to visit
434init-y := init/
435drivers-y := drivers/ sound/
436net-y := net/
437libs-y := lib/
438core-y := usr/
439endif # KBUILD_EXTMOD
440
441ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200442# Read in config
443-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200445ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446# Read in dependencies to all Kconfig* files, make sure to run
447# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700448-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700451$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
Roman Zippelc955cca2006-06-08 22:12:39 -0700453# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100454# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200455# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100456# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700457include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
459else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200460# external modules needs include/linux/autoconf.h and include/config/auto.conf
461# but do not care if they are up-to-date. Use auto.conf to trigger the test
462PHONY += include/config/auto.conf
463
464include/config/auto.conf:
465 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
466 echo; \
467 echo " ERROR: Kernel configuration is invalid."; \
468 echo " include/linux/autoconf.h or $@ are missing."; \
469 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
470 echo; \
471 /bin/false)
472
473endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700474
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475else
476# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700477include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200478endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
480# The all: target is the default when no target is given on the
481# command line.
482# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200483# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484all: vmlinux
485
486ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
487CFLAGS += -Os
488else
489CFLAGS += -O2
490endif
491
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200492include $(srctree)/arch/$(ARCH)/Makefile
493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494ifdef CONFIG_FRAME_POINTER
Adrian Bunkaf332aa2007-07-13 06:18:47 +0200495CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496else
497CFLAGS += -fomit-frame-pointer
498endif
499
500ifdef CONFIG_DEBUG_INFO
501CFLAGS += -g
502endif
503
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200504# Force gcc to behave correct even for buggy distributions
505CFLAGS += $(call cc-option, -fno-stack-protector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506
Sam Ravnborge8e69932005-04-30 16:51:42 -0700507# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700508NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700509CHECKFLAGS += $(NOSTDINC_FLAGS)
510
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511# warn about C99 declaration after statement
512CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
513
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200514# disable pointer signed / unsigned warnings in gcc 4.0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515CFLAGS += $(call cc-option,-Wno-pointer-sign,)
516
Roland McGrath18991192007-07-19 01:48:40 -0700517# Use --build-id when available.
518LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
519 $(call ld-option, -Wl$(comma)--build-id,))
520LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
521LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200524# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525# set in the environment
526# Also any assignments in arch/$(ARCH)/Makefile take precedence over
527# this default value
528export KBUILD_IMAGE ?= vmlinux
529
530#
531# INSTALL_PATH specifies where to place the updated kernel and system map
532# images. Default is /boot, but you can set it to other values
533export INSTALL_PATH ?= /boot
534
535#
536# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
537# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200538# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539#
540
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100541MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542export MODLIB
543
Theodore Ts'oac031f22006-06-21 20:53:09 -0400544#
545# INSTALL_MOD_STRIP, if defined, will cause modules to be
546# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
547# the default option --strip-debug will be used. Otherwise,
548# INSTALL_MOD_STRIP will used as the options to the strip command.
549
550ifdef INSTALL_MOD_STRIP
551ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200552mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400553else
554mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
555endif # INSTALL_MOD_STRIP=1
556else
557mod_strip_cmd = true
558endif # INSTALL_MOD_STRIP
559export mod_strip_cmd
560
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
562ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100563core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
565vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
566 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
567 $(net-y) $(net-m) $(libs-y) $(libs-m)))
568
569vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
570 $(init-n) $(init-) \
571 $(core-n) $(core-) $(drivers-n) $(drivers-) \
572 $(net-n) $(net-) $(libs-n) $(libs-))))
573
574init-y := $(patsubst %/, %/built-in.o, $(init-y))
575core-y := $(patsubst %/, %/built-in.o, $(core-y))
576drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
577net-y := $(patsubst %/, %/built-in.o, $(net-y))
578libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
579libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
580libs-y := $(libs-y1) $(libs-y2)
581
582# Build vmlinux
583# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200584# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200586# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587# Ordering when linking is important, and $(vmlinux-init) must be first.
588#
589# vmlinux
590# ^
591# |
592# +-< $(vmlinux-init)
593# | +--< init/version.o + more
594# |
595# +--< $(vmlinux-main)
596# | +--< driver/built-in.o mm/built-in.o + more
597# |
598# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
599#
600# vmlinux version (uname -v) cannot be updated during normal
601# descending-into-subdirs phase since we do not yet know if we need to
602# update vmlinux.
603# Therefore this step is delayed until just before final link of vmlinux -
604# except in the kallsyms case where it is done just before adding the
605# symbols to the kernel.
606#
607# System.map is generated to document addresses of all kernel symbols
608
609vmlinux-init := $(head-y) $(init-y)
610vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
611vmlinux-all := $(vmlinux-init) $(vmlinux-main)
612vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100613export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614
615# Rule to link vmlinux - also used during CONFIG_KALLSYMS
616# May be overridden by arch/$(ARCH)/Makefile
617quiet_cmd_vmlinux__ ?= LD $@
618 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
619 -T $(vmlinux-lds) $(vmlinux-init) \
620 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200621 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
623# Generate new vmlinux version
624quiet_cmd_vmlinux_version = GEN .version
625 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200626 if [ ! -r .version ]; then \
627 rm -f .version; \
628 echo 1 >.version; \
629 else \
630 mv .version .old_version; \
631 expr 0$$(cat .old_version) + 1 >.version; \
632 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 $(MAKE) $(build)=init
634
635# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200636quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
638
639# Link of vmlinux
640# If CONFIG_KALLSYMS is set .version is already updated
641# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700642# Use + in front of the vmlinux_version rule to silent warning with make -j2
643# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700645 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
647
648 $(call cmd,vmlinux__)
649 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
650
Sam Ravnborg46352812006-08-08 21:41:18 +0200651 $(Q)$(if $($(quiet)cmd_sysmap), \
652 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
653 $(cmd_sysmap) $@ System.map; \
654 if [ $$? -ne 0 ]; then \
655 rm -f $@; \
656 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 fi;
658 $(verify_kallsyms)
659endef
660
661
662ifdef CONFIG_KALLSYMS
663# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
664# It's a three stage process:
665# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
666# empty
667# Running kallsyms on that gives us .tmp_kallsyms1.o with
668# the right size - vmlinux version (uname -v) is updated during this step
669# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
670# but due to the added section, some addresses have shifted.
671# From here, we generate a correct .tmp_kallsyms2.o
672# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
673# o Verify that the System.map from vmlinux matches the map from
674# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
675# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
676# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
677# temporary bypass to allow the kernel to be built while the
678# maintainers work out what went wrong with kallsyms.
679
680ifdef CONFIG_KALLSYMS_EXTRA_PASS
681last_kallsyms := 3
682else
683last_kallsyms := 2
684endif
685
686kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
687
688define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200689 $(Q)$(if $($(quiet)cmd_sysmap), \
690 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200692 $(Q)cmp -s System.map .tmp_System.map || \
693 (echo Inconsistent kallsyms data; \
694 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 rm .tmp_kallsyms* ; /bin/false )
696endef
697
698# Update vmlinux version before link
699# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200700# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701cmd_ksym_ld = $(cmd_vmlinux__)
702define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200703 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 +$(call cmd,vmlinux_version)
705 $(call cmd,vmlinux__)
706 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
707endef
708
709# Generate .S file with all kernel symbols
710quiet_cmd_kallsyms = KSYM $@
711 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
712 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
713
714.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
715 $(call if_changed_dep,as_o_S)
716
717.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
718 $(call cmd,kallsyms)
719
720# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
721.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
722 $(call if_changed_rule,ksym_ld)
723
724.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
725 $(call if_changed,vmlinux__)
726
727.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
728 $(call if_changed,vmlinux__)
729
730# Needs to visit scripts/ before $(KALLSYMS) can be used.
731$(KALLSYMS): scripts ;
732
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000733# Generate some data for debugging strange kallsyms problems
734debug_kallsyms: .tmp_map$(last_kallsyms)
735
736.tmp_map%: .tmp_vmlinux% FORCE
737 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
738
739.tmp_map3: .tmp_map2
740
741.tmp_map2: .tmp_map1
742
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743endif # ifdef CONFIG_KALLSYMS
744
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200745# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
746# relevant sections renamed as per the linker script.
747quiet_cmd_vmlinux-modpost = LD $@
748 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
749 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
750 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
751define rule_vmlinux-modpost
752 :
753 +$(call cmd,vmlinux-modpost)
754 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
755 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
756endef
757
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758# vmlinux image - including updated kernel symbols
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200759vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700760ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100761 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700762endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200763 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200765 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200767vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
768 $(call if_changed_rule,vmlinux-modpost)
769
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770# The actual objects are generated when descending,
771# make sure no implicit rule kicks in
772$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
773
774# Handle descending into subdirectories listed in $(vmlinux-dirs)
775# Preset locale variables to speed up the build process. Limit locale
776# tweaks to this spot to avoid wrong language settings when running
777# make menuconfig etc.
778# Error messages still appears in the original language
779
Paul Smith4f193362006-03-05 17:14:10 -0500780PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200781$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 $(Q)$(MAKE) $(build)=$@
783
Sam Ravnborgcb584552006-01-09 21:20:34 +0100784# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100785#
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400786# The KERNELRELEASE value built here is stored in the file
787# include/config/kernel.release, and is used when executing several
788# make targets, such as "make install" or "make modules_install."
789#
790# The eventual kernel release string consists of the following fields,
791# shown in a hierarchical format to show how smaller parts are concatenated
792# to form the larger and final value, with values coming from places like
793# the Makefile, kernel config options, make command line options and/or
794# SCM tag information.
795#
796# $(KERNELVERSION)
797# $(VERSION) eg, 2
798# $(PATCHLEVEL) eg, 6
799# $(SUBLEVEL) eg, 18
800# $(EXTRAVERSION) eg, -rc6
801# $(localver-full)
802# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100803# localversion* (files without backups, containing '~')
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400804# $(CONFIG_LOCALVERSION) (from kernel config setting)
805# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
806# ./scripts/setlocalversion (SCM tag, if one exists)
807# $(LOCALVERSION) (from make command line if provided)
808#
809# Note how the final $(localver-auto) string is included *only* if the
810# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
811# moment, only git is supported but other SCMs can edit the script
812# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100813
Oleg Verych76c32952007-02-06 02:18:22 +0100814pattern = ".*/localversion[^~]*"
815string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800816 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100817
Oleg Verych76c32952007-02-06 02:18:22 +0100818localver = $(subst $(space),, $(string) \
819 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200820
Sam Ravnborgcb584552006-01-09 21:20:34 +0100821# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
822# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200823# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100824#
825# Currently, only git is supported.
826# Other SCMs can edit scripts/setlocalversion and add the appropriate
827# checks as needed.
828ifdef CONFIG_LOCALVERSION_AUTO
829 _localver-auto = $(shell $(CONFIG_SHELL) \
830 $(srctree)/scripts/setlocalversion $(srctree))
831 localver-auto = $(LOCALVERSION)$(_localver-auto)
832endif
833
834localver-full = $(localver)$(localver-auto)
835
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700836# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100837kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700838include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100839 $(Q)rm -f $@
840 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100841
842
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200844# or the modules are listed in "prepare".
845# A multi level approach is used. prepareN is processed before prepareN-1.
846# archprepare is used in arch Makefiles and when processed asm symlink,
847# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200849# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500850PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200851
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200852# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853# and if so do:
854# 1) Check that make has not been executed in the kernel src $(srctree)
855# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700856prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857ifneq ($(KBUILD_SRC),)
858 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700859 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 echo " $(srctree) is not clean, please run 'make mrproper'";\
861 echo " in the '$(srctree)' directory.";\
862 /bin/false; \
863 fi;
864 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
865 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
866endif
867
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200868# prepare2 creates a makefile if using a separate output directory
869prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
Roman Zippel3eb3c742007-01-10 14:45:28 +0100871prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
872 include/asm include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873ifneq ($(KBUILD_MODULES),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -0400875 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876endif
877
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200878archprepare: prepare1 scripts_basic
879
880prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200881 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200882 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800885prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200887# Leave this as default for preprocessing vmlinux.lds.S, which is now
888# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889
890export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
891
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200892# FIXME: The asm symlink changes when $(ARCH) changes. That's
893# hard to detect, but I suppose "make mrproper" is a good idea
894# before switching between archs anyway.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895
896include/asm:
897 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
898 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
899 @ln -fsn asm-$(ARCH) $@
900
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901# Generate some files
902# ---------------------------------------------------------------------------
903
904# KERNELRELEASE can change from a few different places, meaning version.h
905# needs to be updated, so this check is forced on all builds
906
907uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200908define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200910 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
911 exit 1; \
912 fi; \
913 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914endef
915
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200916define filechk_version.h
917 (echo \#define LINUX_VERSION_CODE $(shell \
918 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
919 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
920endef
921
922include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 $(call filechk,version.h)
924
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200925include/linux/utsrelease.h: include/config/kernel.release FORCE
926 $(call filechk,utsrelease.h)
927
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928# ---------------------------------------------------------------------------
929
Paul Smith4f193362006-03-05 17:14:10 -0500930PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931depend dep:
932 @echo '*** Warning: make $@ is unnecessary now.'
933
934# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100935# Kernel headers
David Woodhouse1ab7a1f32006-09-16 12:15:55 -0700936INSTALL_HDR_PATH=$(objtree)/usr
David Woodhouse8d730cf2006-06-18 11:58:39 +0100937export INSTALL_HDR_PATH
938
David Woodhouse6d716272006-09-24 22:16:03 +0100939HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
940
941PHONY += headers_install_all
Roman Zippel3eb3c742007-01-10 14:45:28 +0100942headers_install_all: include/linux/version.h scripts_basic FORCE
Linus Torvalds398477d2006-09-24 14:55:52 -0700943 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100944 $(Q)for arch in $(HDRARCHES); do \
Linus Torvalds398477d2006-09-24 14:55:52 -0700945 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
David Woodhouse6d716272006-09-24 22:16:03 +0100946 done
947
David Woodhouse8d730cf2006-06-18 11:58:39 +0100948PHONY += headers_install
Roman Zippel3eb3c742007-01-10 14:45:28 +0100949headers_install: include/linux/version.h scripts_basic FORCE
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100950 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +0100951 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
952 exit 1 ; fi
Sam Ravnborg07aea3a2006-07-23 20:47:50 +0200953 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200954 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
David Woodhouse8d730cf2006-06-18 11:58:39 +0100955
Mike Frysinger1f857122007-02-14 00:33:02 -0800956PHONY += headers_check_all
957headers_check_all: headers_install_all
958 $(Q)for arch in $(HDRARCHES); do \
959 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
960 done
961
David Woodhouse68475352006-06-18 12:02:10 +0100962PHONY += headers_check
963headers_check: headers_install
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200964 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +0100965
David Woodhouse8d730cf2006-06-18 11:58:39 +0100966# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967# Modules
968
969ifdef CONFIG_MODULES
970
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200971# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972
973all: modules
974
975# Build modules
976
Paul Smith4f193362006-03-05 17:14:10 -0500977PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
979 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200980 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
982
983# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500984PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200985modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
987# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500988PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989modules_install: _modinst_ _modinst_post
990
Paul Smith4f193362006-03-05 17:14:10 -0500991PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700993 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 echo "Warning: you may need to install module-init-tools"; \
995 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
996 sleep 1; \
997 fi
998 @rm -rf $(MODLIB)/kernel
999 @rm -f $(MODLIB)/source
1000 @mkdir -p $(MODLIB)/kernel
1001 @ln -s $(srctree) $(MODLIB)/source
1002 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1003 rm -f $(MODLIB)/build ; \
1004 ln -s $(objtree) $(MODLIB)/build ; \
1005 fi
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001006 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007
1008# If System.map exists, run depmod. This deliberately does not have a
1009# dependency on System.map since that would run the dependency tree on
1010# vmlinux. This depmod is only for convenience to give the initial
1011# boot a modules.dep even before / is mounted read-write. However the
1012# boot script depmod is the master version.
1013ifeq "$(strip $(INSTALL_MOD_PATH))" ""
1014depmod_opts :=
1015else
1016depmod_opts := -b $(INSTALL_MOD_PATH) -r
1017endif
Paul Smith4f193362006-03-05 17:14:10 -05001018PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019_modinst_post: _modinst_
1020 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1021
1022else # CONFIG_MODULES
1023
1024# Modules not configured
1025# ---------------------------------------------------------------------------
1026
1027modules modules_install: FORCE
1028 @echo
1029 @echo "The present kernel configuration has modules disabled."
1030 @echo "Type 'make config' and enable loadable module support."
1031 @echo "Then build a kernel with module support enabled."
1032 @echo
1033 @exit 1
1034
1035endif # CONFIG_MODULES
1036
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037###
1038# Cleaning is done on three levels.
1039# make clean Delete most generated files
1040# Leave enough to build external modules
1041# make mrproper Delete the current configuration, and all generated files
1042# make distclean Remove editor backup files, patch leftover files and the like
1043
1044# Directories & files removed with 'make clean'
1045CLEAN_DIRS += $(MODVERDIR)
1046CLEAN_FILES += vmlinux System.map \
1047 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1048
1049# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f32006-09-16 12:15:55 -07001050MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001051MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001052 include/linux/autoconf.h include/linux/version.h \
1053 include/linux/utsrelease.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001054 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055
1056# clean - Delete most, but leave enough to build external modules
1057#
1058clean: rm-dirs := $(CLEAN_DIRS)
1059clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001060clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
Paul Smith4f193362006-03-05 17:14:10 -05001062PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063$(clean-dirs):
1064 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1065
1066clean: archclean $(clean-dirs)
1067 $(call cmd,rmdirs)
1068 $(call cmd,rmfiles)
1069 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001070 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001071 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1072 -o -name '*.symtypes' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 -type f -print | xargs rm -f
1074
1075# mrproper - Delete all generated files, including .config
1076#
1077mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1078mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1079mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1080
Paul Smith4f193362006-03-05 17:14:10 -05001081PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082$(mrproper-dirs):
1083 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1084
1085mrproper: clean archmrproper $(mrproper-dirs)
1086 $(call cmd,rmdirs)
1087 $(call cmd,rmfiles)
1088
1089# distclean
1090#
Paul Smith4f193362006-03-05 17:14:10 -05001091PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092
1093distclean: mrproper
1094 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001095 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001097 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1099 -type f -print | xargs rm -f
1100
1101
1102# Packaging of the kernel to various formats
1103# ---------------------------------------------------------------------------
1104# rpm target kept for backward compatibility
1105package-dir := $(srctree)/scripts/package
1106
Zach Brown031ecc62006-06-08 22:12:37 -07001107%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001108 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001109rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001110 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111
1112
1113# Brief documentation of the typical targets used
1114# ---------------------------------------------------------------------------
1115
1116boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1117boards := $(notdir $(boards))
1118
1119help:
1120 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001121 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001122 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001123 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001124 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 @echo ''
1126 @echo 'Configuration targets:'
1127 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1128 @echo ''
1129 @echo 'Other generic targets:'
1130 @echo ' all - Build all targets marked with [*]'
1131 @echo '* vmlinux - Build the bare kernel'
1132 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001133 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 @echo ' dir/ - Build all files in dir and below'
1135 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001136 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 @echo ' rpm - Build a kernel as an RPM package'
1138 @echo ' tags/TAGS - Generate tags file for editors'
1139 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001140 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001141 @echo ' kernelversion - Output the version stored in Makefile'
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001142 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001143 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001144 echo ' (default: $(INSTALL_HDR_PATH))'; \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001145 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 @echo ''
1147 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 @echo ' checkstack - Generate a list of stack hogs'
1149 @echo ' namespacecheck - Name space analysis on compiled kernel'
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001150 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001151 echo ' headers_check - Sanity check on exported headers'; \
1152 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 @echo ''
1154 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001155 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 @echo ''
1157 @echo 'Documentation targets:'
1158 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1159 @echo ''
1160 @echo 'Architecture specific targets ($(ARCH)):'
1161 @$(if $(archhelp),$(archhelp),\
1162 echo ' No architecture specific help defined for $(ARCH)')
1163 @echo ''
1164 @$(if $(boards), \
1165 $(foreach b, $(boards), \
1166 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1167 echo '')
1168
1169 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001170 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001172 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1173 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 @echo ''
1175 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1176 @echo 'For further info see the ./README file'
1177
1178
1179# Documentation targets
1180# ---------------------------------------------------------------------------
1181%docs: scripts_basic FORCE
1182 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1183
1184else # KBUILD_EXTMOD
1185
1186###
1187# External module support.
1188# When building external modules the kernel used as basis is considered
1189# read-only, and no consistency checks are made and the make
1190# system is not used on the basis kernel. If updates are required
1191# in the basis kernel ordinary make commands (without M=...) must
1192# be used.
1193#
1194# The following are the only valid targets when building external
1195# modules.
1196# make M=dir clean Delete all automatically generated files
1197# make M=dir modules Make all modules in specified dir
1198# make M=dir Same as 'make M=dir modules'
1199# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001200# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201# Assumes install directory is already created
1202
1203# We are always building modules
1204KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001205PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206crmodverdir:
1207 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -04001208 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209
Paul Smith4f193362006-03-05 17:14:10 -05001210PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211$(objtree)/Module.symvers:
1212 @test -e $(objtree)/Module.symvers || ( \
1213 echo; \
1214 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1215 echo " is missing; modules will have no dependencies and modversions."; \
1216 echo )
1217
1218module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001219PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220$(module-dirs): crmodverdir $(objtree)/Module.symvers
1221 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1222
1223modules: $(module-dirs)
1224 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001225 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226
Paul Smith4f193362006-03-05 17:14:10 -05001227PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001228modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001229
Paul Smith4f193362006-03-05 17:14:10 -05001230install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1231PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001232_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001233 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001234 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235
Sam Ravnborga67dc212006-01-28 23:51:57 +01001236# Run depmod only is we have System.map and depmod is executable
1237quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1238 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1239 $(DEPMOD) -ae -F System.map \
1240 $(if $(strip $(INSTALL_MOD_PATH)), \
1241 -b $(INSTALL_MOD_PATH) -r) \
1242 $(KERNELRELEASE); \
1243 fi
1244
Paul Smith4f193362006-03-05 17:14:10 -05001245PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001246_emodinst_post: _emodinst_
1247 $(call cmd,depmod)
1248
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1250
Paul Smith4f193362006-03-05 17:14:10 -05001251PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252$(clean-dirs):
1253 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1254
1255clean: rm-dirs := $(MODVERDIR)
1256clean: $(clean-dirs)
1257 $(call cmd,rmdirs)
1258 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001259 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1261 -type f -print | xargs rm -f
1262
1263help:
1264 @echo ' Building external modules.'
1265 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1266 @echo ''
1267 @echo ' modules - default target, build the module(s)'
1268 @echo ' modules_install - install the module'
1269 @echo ' clean - remove generated files in module directory only'
1270 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001271
1272# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001273PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001274prepare: ;
1275scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276endif # KBUILD_EXTMOD
1277
1278# Generate tags for editors
1279# ---------------------------------------------------------------------------
1280
1281#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1282#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1283#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1284
George Anzingerf182ae62005-07-07 17:56:06 -07001285ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286__srctree =
1287else
1288__srctree = $(srctree)/
1289endif
1290
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001291ifeq ($(ALLSOURCE_ARCHS),)
1292ifeq ($(ARCH),um)
1293ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1294else
1295ALLINCLUDE_ARCHS := $(ARCH)
1296endif
1297else
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001298#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001299ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1300endif
1301
Ian Campbella0674e82005-06-23 11:25:54 +01001302ALLSOURCE_ARCHS := $(ARCH)
1303
Masatake YAMATOe838db62006-06-22 12:21:20 +09001304define find-sources
Don Mullisdd7e54a2007-01-04 10:14:52 -08001305 ( for ARCH in $(ALLSOURCE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001306 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001307 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001308 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001310 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 find $(__srctree)include $(RCS_FIND_IGNORE) \
1312 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001313 -o -name $1 -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001314 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Ian Campbella0674e82005-06-23 11:25:54 +01001315 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001316 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001317 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001319 -name $1 -print; \
1320 find $(__srctree) $(RCS_FIND_IGNORE) \
1321 \( -name include -o -name arch \) -prune -o \
1322 -name $1 -print; \
1323 )
Masatake YAMATOe838db62006-06-22 12:21:20 +09001324endef
1325
1326define all-sources
1327 $(call find-sources,'*.[chS]')
1328endef
1329define all-kconfigs
1330 $(call find-sources,'Kconfig*')
1331endef
1332define all-defconfigs
1333 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334endef
1335
Aron Griffisda7c0402006-09-21 00:27:02 -04001336define xtags
1337 if $1 --version 2>&1 | grep -iq exuberant; then \
1338 $(all-sources) | xargs $1 -a \
1339 -I __initdata,__exitdata,__acquires,__releases \
1340 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
Aneesh Kumar K.V91b943e2006-10-17 00:10:32 -07001341 --extra=+f --c-kinds=+px \
Aneesh Kumar K.Va412c172007-07-09 11:43:57 -07001342 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001343 $(all-kconfigs) | xargs $1 -a \
1344 --langdef=kconfig \
1345 --language-force=kconfig \
1346 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001347 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001348 --langdef=dotconfig \
1349 --language-force=dotconfig \
1350 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1351 elif $1 --version 2>&1 | grep -iq emacs; then \
1352 $(all-sources) | xargs $1 -a; \
1353 $(all-kconfigs) | xargs $1 -a \
1354 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001355 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001356 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1357 else \
1358 $(all-sources) | xargs $1 -a; \
1359 fi
1360endef
1361
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001363 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364
1365quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001366 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367
1368cscope: FORCE
1369 $(call cmd,cscope-file)
1370 $(call cmd,cscope)
1371
1372quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001373define cmd_TAGS
1374 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001375 $(call xtags,etags)
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001376endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001378TAGS: FORCE
1379 $(call cmd,TAGS)
1380
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381quiet_cmd_tags = MAKE $@
1382define cmd_tags
1383 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001384 $(call xtags,ctags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385endef
1386
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387tags: FORCE
1388 $(call cmd,tags)
1389
1390
1391# Scripts to check various things for consistency
1392# ---------------------------------------------------------------------------
1393
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394includecheck:
1395 find * $(RCS_FIND_IGNORE) \
1396 -name '*.[hcS]' -type f -print | sort \
1397 | xargs $(PERL) -w scripts/checkincludes.pl
1398
1399versioncheck:
1400 find * $(RCS_FIND_IGNORE) \
1401 -name '*.[hcS]' -type f -print | sort \
1402 | xargs $(PERL) -w scripts/checkversion.pl
1403
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404namespacecheck:
1405 $(PERL) $(srctree)/scripts/namespace.pl
1406
1407endif #ifeq ($(config-targets),1)
1408endif #ifeq ($(mixed-targets),1)
1409
Roman Zippelc30a02e2006-06-08 22:12:50 -07001410PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001411
Jeff Dike011e3a92006-12-13 00:34:12 -08001412# UML needs a little special treatment here. It wants to use the host
1413# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1414# else wants $(ARCH), including people doing cross-builds, which means
1415# that $(SUBARCH) doesn't work here.
1416ifeq ($(ARCH), um)
1417CHECKSTACK_ARCH := $(SUBARCH)
1418else
1419CHECKSTACK_ARCH := $(ARCH)
1420endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421checkstack:
1422 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001423 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
1425kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001426 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1427 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001428kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001429 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430
Sam Ravnborg06300b22006-01-25 07:13:18 +01001431# Single targets
1432# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001433# Single targets are compatible with:
1434# - build whith mixed source and output
1435# - build with separate output dir 'make O=...'
1436# - external modules
1437#
1438# target-dir => where to store outputfile
1439# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001440
Sam Ravnborg06300b22006-01-25 07:13:18 +01001441ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001442 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001443 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001444else
1445 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001446 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1447 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001448endif
1449
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001450%.s: %.c prepare scripts FORCE
1451 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1452%.i: %.c prepare scripts FORCE
1453 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1454%.o: %.c prepare scripts FORCE
1455 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1456%.lst: %.c prepare scripts FORCE
1457 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1458%.s: %.S prepare scripts FORCE
1459 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1460%.o: %.S prepare scripts FORCE
1461 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001462%.symtypes: %.c prepare scripts FORCE
1463 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001464
1465# Modules
1466/ %/: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001467 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001468 $(build)=$(build-dir)
1469%.ko: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001470 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001471 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001472 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001473
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474# FIXME Should go into a make.lib or something
1475# ===========================================================================
1476
1477quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1478 cmd_rmdirs = rm -rf $(rm-dirs)
1479
1480quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1481 cmd_rmfiles = rm -f $(rm-files)
1482
1483
1484a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1485 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001486 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487
1488quiet_cmd_as_o_S = AS $@
1489cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1490
1491# read all saved command lines
1492
1493targets := $(wildcard $(sort $(targets)))
1494cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1495
1496ifneq ($(cmd_files),)
1497 $(cmd_files): ; # Do not try to update included dependency files
1498 include $(cmd_files)
1499endif
1500
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1502# Usage:
1503# $(Q)$(MAKE) $(clean)=dir
1504clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1505
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506endif # skip-makefile
1507
Paul Smith4f193362006-03-05 17:14:10 -05001508PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001510
Oleg Verych15964862006-12-10 02:18:40 -08001511# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1512Makefile: ;
Paul Smith4f193362006-03-05 17:14:10 -05001513
1514# Declare the contents of the .PHONY variable as phony. We keep that
1515# information in a variable se we can use it in if_changed and friends.
1516.PHONY: $(PHONY)