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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldsf695baf2007-07-22 13:41:00 -07003SUBLEVEL = 23
Linus Torvaldsbbf25010f2007-10-09 13:31:38 -07004EXTRAVERSION =
Linus Torvalds81cfe792007-09-19 16:01:13 -07005NAME = Arr Matey! A Hairy Bilge Rat!
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
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200189UTS_MACHINE := $(ARCH)
190SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700192KCONFIG_CONFIG ?= .config
193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194# SHELL used by kbuild
195CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
196 else if [ -x /bin/bash ]; then echo /bin/bash; \
197 else echo sh; fi ; fi)
198
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200199HOSTCC = gcc
200HOSTCXX = g++
201HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
202HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200204# Decide whether to build built-in, modular, or both.
205# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
207KBUILD_MODULES :=
208KBUILD_BUILTIN := 1
209
210# If we have only "make modules", don't compile built-in objects.
211# When we're building modules with modversions, we need to consider
212# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200213# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
215ifeq ($(MAKECMDGOALS),modules)
216 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
217endif
218
219# If we have "make <whatever> modules", compile modules
220# in addition to whatever we do anyway.
221# Just "make" or "make all" shall build modules as well
222
223ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
224 KBUILD_MODULES := 1
225endif
226
227ifeq ($(MAKECMDGOALS),)
228 KBUILD_MODULES := 1
229endif
230
Sam Ravnborge579d352005-07-27 08:10:10 +0200231export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
233
234# Beautify output
235# ---------------------------------------------------------------------------
236#
237# Normally, we echo the whole command before executing it. By making
238# that echo $($(quiet)$(cmd)), we now have the possibility to set
239# $(quiet) to choose other forms of output instead, e.g.
240#
241# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
242# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
243#
244# If $(quiet) is empty, the whole command will be printed.
245# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200246# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247# the variable $(silent_cmd_cc_o_c) doesn't exist.
248#
Adrian Bunka58a4142006-01-10 00:08:17 +0100249# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250# for commands that shall be hidden in non-verbose mode.
251#
252# $(Q)ln $@ :<
253#
254# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
255# If KBUILD_VERBOSE equals 1 then the above command is displayed.
256
257ifeq ($(KBUILD_VERBOSE),1)
258 quiet =
259 Q =
260else
261 quiet=quiet_
262 Q = @
263endif
264
265# If the user is running make -s (silent mode), suppress echoing of
266# commands
267
268ifneq ($(findstring s,$(MAKEFLAGS)),)
269 quiet=silent_
270endif
271
272export quiet Q KBUILD_VERBOSE
273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
275# Look for make include files relative to root of kernel src
276MAKEFLAGS += --include-dir=$(srctree)
277
Oleg Verych15964862006-12-10 02:18:40 -0800278# We need some generic definitions.
279include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
281# Make variables (CC, etc...)
282
283AS = $(CROSS_COMPILE)as
284LD = $(CROSS_COMPILE)ld
285CC = $(CROSS_COMPILE)gcc
286CPP = $(CC) -E
287AR = $(CROSS_COMPILE)ar
288NM = $(CROSS_COMPILE)nm
289STRIP = $(CROSS_COMPILE)strip
290OBJCOPY = $(CROSS_COMPILE)objcopy
291OBJDUMP = $(CROSS_COMPILE)objdump
292AWK = awk
293GENKSYMS = scripts/genksyms/genksyms
294DEPMOD = /sbin/depmod
295KALLSYMS = scripts/kallsyms
296PERL = perl
297CHECK = sparse
298
Al Viroaf4ca452005-10-21 02:55:38 -0400299CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300MODFLAGS = -DMODULE
301CFLAGS_MODULE = $(MODFLAGS)
302AFLAGS_MODULE = $(MODFLAGS)
Roland McGrath114f5152007-07-23 01:12:08 -0700303LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304CFLAGS_KERNEL =
305AFLAGS_KERNEL =
306
307
308# Use LINUXINCLUDE when you must reference the include/ directory.
309# Needed to be compatible with the O= option
310LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100311 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Zachary Amsdene623a3b2005-11-07 15:27:51 -0800312 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
314CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
315
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200316CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700317 -fno-strict-aliasing -fno-common \
318 -Werror-implicit-function-declaration
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200319AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700321# Read KERNELRELEASE from include/config/kernel.release (if it exists)
322KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100323KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100324
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200325export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200326export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200327export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
328export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
330export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200331export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
333
334# When compiling out-of-tree modules, put MODVERDIR in the module
335# tree rather than in the kernel tree. The kernel tree might
336# even be read-only.
337export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339# Files to ignore in find ... statements
340
Trond Myklebust406119f2005-10-27 14:46:53 -0400341RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
342export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344# ===========================================================================
345# Rules shared between *config targets and build targets
346
347# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500348PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349scripts_basic:
350 $(Q)$(MAKE) $(build)=scripts/basic
351
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200352# To avoid any implicit rule to kick in, define an empty command.
353scripts/basic/%: scripts_basic ;
354
Paul Smith4f193362006-03-05 17:14:10 -0500355PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200356# outputmakefile generates a Makefile in the output directory, if using a
357# separate output directory. This allows convenient use of make in the
358# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200360ifneq ($(KBUILD_SRC),)
361 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
362 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
363endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
365# To make sure we do not include .config for any of the *config targets
366# catch them early, and hand them over to scripts/kconfig/Makefile
367# It is allowed to specify more targets when calling make, including
368# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200369# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370# Detect when mixed targets is specified, and make a second invocation
371# of make so .config is not included in this case either (for *config).
372
Roman Zippel3eb3c742007-01-10 14:45:28 +0100373no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700374 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100375 include/linux/version.h headers_% \
376 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
378config-targets := 0
379mixed-targets := 0
380dot-config := 1
381
382ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
383 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
384 dot-config := 0
385 endif
386endif
387
388ifeq ($(KBUILD_EXTMOD),)
389 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
390 config-targets := 1
391 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
392 mixed-targets := 1
393 endif
394 endif
395endif
396
397ifeq ($(mixed-targets),1)
398# ===========================================================================
399# We're called with mixed targets (*config and build targets).
400# Handle them one by one.
401
402%:: FORCE
403 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
404
405else
406ifeq ($(config-targets),1)
407# ===========================================================================
408# *config targets only - make sure prerequisites are updated, and descend
409# in scripts/kconfig to make the *config target
410
411# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
412# KBUILD_DEFCONFIG may point out an alternative default configuration
413# used for 'make defconfig'
414include $(srctree)/arch/$(ARCH)/Makefile
415export KBUILD_DEFCONFIG
416
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200417config %config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700418 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 $(Q)$(MAKE) $(build)=scripts/kconfig $@
420
421else
422# ===========================================================================
423# Build targets only - this includes vmlinux, arch specific targets, clean
424# targets and others. In general all targets except *config targets.
425
426ifeq ($(KBUILD_EXTMOD),)
427# Additional helpers built in scripts/
428# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200429# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500430PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700431scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 $(Q)$(MAKE) $(build)=$(@)
433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434# Objects we will link into vmlinux / subdirs we need to visit
435init-y := init/
436drivers-y := drivers/ sound/
437net-y := net/
438libs-y := lib/
439core-y := usr/
440endif # KBUILD_EXTMOD
441
442ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200443# Read in config
444-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200446ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447# Read in dependencies to all Kconfig* files, make sure to run
448# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700449-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700452$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
Roman Zippelc955cca2006-06-08 22:12:39 -0700454# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100455# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200456# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100457# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700458include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
460else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200461# external modules needs include/linux/autoconf.h and include/config/auto.conf
462# but do not care if they are up-to-date. Use auto.conf to trigger the test
463PHONY += include/config/auto.conf
464
465include/config/auto.conf:
466 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
467 echo; \
468 echo " ERROR: Kernel configuration is invalid."; \
469 echo " include/linux/autoconf.h or $@ are missing."; \
470 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
471 echo; \
472 /bin/false)
473
474endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476else
477# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700478include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200479endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
481# The all: target is the default when no target is given on the
482# command line.
483# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200484# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485all: vmlinux
486
487ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
488CFLAGS += -Os
489else
490CFLAGS += -O2
491endif
492
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200493include $(srctree)/arch/$(ARCH)/Makefile
494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495ifdef CONFIG_FRAME_POINTER
Adrian Bunkaf332aa2007-07-13 06:18:47 +0200496CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497else
498CFLAGS += -fomit-frame-pointer
499endif
500
501ifdef CONFIG_DEBUG_INFO
502CFLAGS += -g
503endif
504
Sam Ravnborgc9eca0b2006-08-16 21:14:08 +0200505# Force gcc to behave correct even for buggy distributions
506CFLAGS += $(call cc-option, -fno-stack-protector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
Sam Ravnborge8e69932005-04-30 16:51:42 -0700508# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700509NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700510CHECKFLAGS += $(NOSTDINC_FLAGS)
511
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512# warn about C99 declaration after statement
513CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
514
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200515# disable pointer signed / unsigned warnings in gcc 4.0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516CFLAGS += $(call cc-option,-Wno-pointer-sign,)
517
Roland McGrath18991192007-07-19 01:48:40 -0700518# Use --build-id when available.
519LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
520 $(call ld-option, -Wl$(comma)--build-id,))
521LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
522LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
523
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200525# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526# set in the environment
527# Also any assignments in arch/$(ARCH)/Makefile take precedence over
528# this default value
529export KBUILD_IMAGE ?= vmlinux
530
531#
532# INSTALL_PATH specifies where to place the updated kernel and system map
533# images. Default is /boot, but you can set it to other values
534export INSTALL_PATH ?= /boot
535
536#
537# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
538# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200539# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540#
541
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100542MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543export MODLIB
544
Theodore Ts'oac031f22006-06-21 20:53:09 -0400545#
546# INSTALL_MOD_STRIP, if defined, will cause modules to be
547# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
548# the default option --strip-debug will be used. Otherwise,
549# INSTALL_MOD_STRIP will used as the options to the strip command.
550
551ifdef INSTALL_MOD_STRIP
552ifeq ($(INSTALL_MOD_STRIP),1)
Andreas Schwabe3402212006-07-05 18:57:48 +0200553mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400554else
555mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
556endif # INSTALL_MOD_STRIP=1
557else
558mod_strip_cmd = true
559endif # INSTALL_MOD_STRIP
560export mod_strip_cmd
561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562
563ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100564core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
566vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
567 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
568 $(net-y) $(net-m) $(libs-y) $(libs-m)))
569
570vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
571 $(init-n) $(init-) \
572 $(core-n) $(core-) $(drivers-n) $(drivers-) \
573 $(net-n) $(net-) $(libs-n) $(libs-))))
574
575init-y := $(patsubst %/, %/built-in.o, $(init-y))
576core-y := $(patsubst %/, %/built-in.o, $(core-y))
577drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
578net-y := $(patsubst %/, %/built-in.o, $(net-y))
579libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
580libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
581libs-y := $(libs-y1) $(libs-y2)
582
583# Build vmlinux
584# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200585# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200587# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588# Ordering when linking is important, and $(vmlinux-init) must be first.
589#
590# vmlinux
591# ^
592# |
593# +-< $(vmlinux-init)
594# | +--< init/version.o + more
595# |
596# +--< $(vmlinux-main)
597# | +--< driver/built-in.o mm/built-in.o + more
598# |
599# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
600#
601# vmlinux version (uname -v) cannot be updated during normal
602# descending-into-subdirs phase since we do not yet know if we need to
603# update vmlinux.
604# Therefore this step is delayed until just before final link of vmlinux -
605# except in the kallsyms case where it is done just before adding the
606# symbols to the kernel.
607#
608# System.map is generated to document addresses of all kernel symbols
609
610vmlinux-init := $(head-y) $(init-y)
611vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
612vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200613vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100614export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
616# Rule to link vmlinux - also used during CONFIG_KALLSYMS
617# May be overridden by arch/$(ARCH)/Makefile
618quiet_cmd_vmlinux__ ?= LD $@
619 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
620 -T $(vmlinux-lds) $(vmlinux-init) \
621 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200622 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
624# Generate new vmlinux version
625quiet_cmd_vmlinux_version = GEN .version
626 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200627 if [ ! -r .version ]; then \
628 rm -f .version; \
629 echo 1 >.version; \
630 else \
631 mv .version .old_version; \
632 expr 0$$(cat .old_version) + 1 >.version; \
633 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 $(MAKE) $(build)=init
635
636# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200637quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
639
640# Link of vmlinux
641# If CONFIG_KALLSYMS is set .version is already updated
642# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700643# Use + in front of the vmlinux_version rule to silent warning with make -j2
644# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700646 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
648
649 $(call cmd,vmlinux__)
650 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
651
Sam Ravnborg46352812006-08-08 21:41:18 +0200652 $(Q)$(if $($(quiet)cmd_sysmap), \
653 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
654 $(cmd_sysmap) $@ System.map; \
655 if [ $$? -ne 0 ]; then \
656 rm -f $@; \
657 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 fi;
659 $(verify_kallsyms)
660endef
661
662
663ifdef CONFIG_KALLSYMS
664# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
665# It's a three stage process:
666# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
667# empty
668# Running kallsyms on that gives us .tmp_kallsyms1.o with
669# the right size - vmlinux version (uname -v) is updated during this step
670# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
671# but due to the added section, some addresses have shifted.
672# From here, we generate a correct .tmp_kallsyms2.o
673# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
674# o Verify that the System.map from vmlinux matches the map from
675# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
676# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
677# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
678# temporary bypass to allow the kernel to be built while the
679# maintainers work out what went wrong with kallsyms.
680
681ifdef CONFIG_KALLSYMS_EXTRA_PASS
682last_kallsyms := 3
683else
684last_kallsyms := 2
685endif
686
687kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
688
689define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200690 $(Q)$(if $($(quiet)cmd_sysmap), \
691 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200693 $(Q)cmp -s System.map .tmp_System.map || \
694 (echo Inconsistent kallsyms data; \
695 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 rm .tmp_kallsyms* ; /bin/false )
697endef
698
699# Update vmlinux version before link
700# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200701# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702cmd_ksym_ld = $(cmd_vmlinux__)
703define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200704 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 +$(call cmd,vmlinux_version)
706 $(call cmd,vmlinux__)
707 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
708endef
709
710# Generate .S file with all kernel symbols
711quiet_cmd_kallsyms = KSYM $@
712 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
713 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
714
715.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
716 $(call if_changed_dep,as_o_S)
717
718.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
719 $(call cmd,kallsyms)
720
721# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
722.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
723 $(call if_changed_rule,ksym_ld)
724
725.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
726 $(call if_changed,vmlinux__)
727
728.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
729 $(call if_changed,vmlinux__)
730
731# Needs to visit scripts/ before $(KALLSYMS) can be used.
732$(KALLSYMS): scripts ;
733
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000734# Generate some data for debugging strange kallsyms problems
735debug_kallsyms: .tmp_map$(last_kallsyms)
736
737.tmp_map%: .tmp_vmlinux% FORCE
738 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
739
740.tmp_map3: .tmp_map2
741
742.tmp_map2: .tmp_map1
743
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744endif # ifdef CONFIG_KALLSYMS
745
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200746# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
747# relevant sections renamed as per the linker script.
748quiet_cmd_vmlinux-modpost = LD $@
749 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
750 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
751 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
752define rule_vmlinux-modpost
753 :
754 +$(call cmd,vmlinux-modpost)
755 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
756 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
757endef
758
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759# vmlinux image - including updated kernel symbols
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200760vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700761ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100762 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700763endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200764 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200766 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200768vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
769 $(call if_changed_rule,vmlinux-modpost)
770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771# The actual objects are generated when descending,
772# make sure no implicit rule kicks in
773$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
774
775# Handle descending into subdirectories listed in $(vmlinux-dirs)
776# Preset locale variables to speed up the build process. Limit locale
777# tweaks to this spot to avoid wrong language settings when running
778# make menuconfig etc.
779# Error messages still appears in the original language
780
Paul Smith4f193362006-03-05 17:14:10 -0500781PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200782$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 $(Q)$(MAKE) $(build)=$@
784
Sam Ravnborgcb584552006-01-09 21:20:34 +0100785# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100786#
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400787# The KERNELRELEASE value built here is stored in the file
788# include/config/kernel.release, and is used when executing several
789# make targets, such as "make install" or "make modules_install."
790#
791# The eventual kernel release string consists of the following fields,
792# shown in a hierarchical format to show how smaller parts are concatenated
793# to form the larger and final value, with values coming from places like
794# the Makefile, kernel config options, make command line options and/or
795# SCM tag information.
796#
797# $(KERNELVERSION)
798# $(VERSION) eg, 2
799# $(PATCHLEVEL) eg, 6
800# $(SUBLEVEL) eg, 18
801# $(EXTRAVERSION) eg, -rc6
802# $(localver-full)
803# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100804# localversion* (files without backups, containing '~')
Robert P. J. Day1ef988562006-09-12 12:38:19 -0400805# $(CONFIG_LOCALVERSION) (from kernel config setting)
806# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
807# ./scripts/setlocalversion (SCM tag, if one exists)
808# $(LOCALVERSION) (from make command line if provided)
809#
810# Note how the final $(localver-auto) string is included *only* if the
811# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
812# moment, only git is supported but other SCMs can edit the script
813# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100814
Oleg Verych76c32952007-02-06 02:18:22 +0100815pattern = ".*/localversion[^~]*"
816string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800817 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100818
Oleg Verych76c32952007-02-06 02:18:22 +0100819localver = $(subst $(space),, $(string) \
820 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200821
Sam Ravnborgcb584552006-01-09 21:20:34 +0100822# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
823# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200824# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100825#
826# Currently, only git is supported.
827# Other SCMs can edit scripts/setlocalversion and add the appropriate
828# checks as needed.
829ifdef CONFIG_LOCALVERSION_AUTO
830 _localver-auto = $(shell $(CONFIG_SHELL) \
831 $(srctree)/scripts/setlocalversion $(srctree))
832 localver-auto = $(LOCALVERSION)$(_localver-auto)
833endif
834
835localver-full = $(localver)$(localver-auto)
836
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700837# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100838kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700839include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100840 $(Q)rm -f $@
841 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100842
843
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200845# or the modules are listed in "prepare".
846# A multi level approach is used. prepareN is processed before prepareN-1.
847# archprepare is used in arch Makefiles and when processed asm symlink,
848# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200850# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500851PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200852
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200853# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854# and if so do:
855# 1) Check that make has not been executed in the kernel src $(srctree)
856# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700857prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858ifneq ($(KBUILD_SRC),)
859 @echo ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700860 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 echo " $(srctree) is not clean, please run 'make mrproper'";\
862 echo " in the '$(srctree)' directory.";\
863 /bin/false; \
864 fi;
865 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
866 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
867endif
868
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200869# prepare2 creates a makefile if using a separate output directory
870prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
Roman Zippel3eb3c742007-01-10 14:45:28 +0100872prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
873 include/asm include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874ifneq ($(KBUILD_MODULES),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -0400876 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877endif
878
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200879archprepare: prepare1 scripts_basic
880
881prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200882 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200883 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200884
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800886prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200888# Leave this as default for preprocessing vmlinux.lds.S, which is now
889# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
891export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
892
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200893# FIXME: The asm symlink changes when $(ARCH) changes. That's
894# hard to detect, but I suppose "make mrproper" is a good idea
895# before switching between archs anyway.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896
897include/asm:
898 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
899 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
900 @ln -fsn asm-$(ARCH) $@
901
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902# Generate some files
903# ---------------------------------------------------------------------------
904
905# KERNELRELEASE can change from a few different places, meaning version.h
906# needs to be updated, so this check is forced on all builds
907
908uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200909define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200911 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
912 exit 1; \
913 fi; \
914 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915endef
916
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200917define filechk_version.h
918 (echo \#define LINUX_VERSION_CODE $(shell \
919 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
920 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
921endef
922
923include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 $(call filechk,version.h)
925
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200926include/linux/utsrelease.h: include/config/kernel.release FORCE
927 $(call filechk,utsrelease.h)
928
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929# ---------------------------------------------------------------------------
930
Paul Smith4f193362006-03-05 17:14:10 -0500931PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932depend dep:
933 @echo '*** Warning: make $@ is unnecessary now.'
934
935# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100936# Kernel headers
David Woodhouse1ab7a1f32006-09-16 12:15:55 -0700937INSTALL_HDR_PATH=$(objtree)/usr
David Woodhouse8d730cf2006-06-18 11:58:39 +0100938export INSTALL_HDR_PATH
939
David Woodhouse6d716272006-09-24 22:16:03 +0100940HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
941
942PHONY += headers_install_all
Roman Zippel3eb3c742007-01-10 14:45:28 +0100943headers_install_all: include/linux/version.h scripts_basic FORCE
Linus Torvalds398477d2006-09-24 14:55:52 -0700944 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100945 $(Q)for arch in $(HDRARCHES); do \
Linus Torvalds398477d2006-09-24 14:55:52 -0700946 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
David Woodhouse6d716272006-09-24 22:16:03 +0100947 done
948
David Woodhouse8d730cf2006-06-18 11:58:39 +0100949PHONY += headers_install
Roman Zippel3eb3c742007-01-10 14:45:28 +0100950headers_install: include/linux/version.h scripts_basic FORCE
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100951 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +0100952 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
953 exit 1 ; fi
Sam Ravnborg07aea3a2006-07-23 20:47:50 +0200954 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200955 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
David Woodhouse8d730cf2006-06-18 11:58:39 +0100956
Mike Frysinger1f857122007-02-14 00:33:02 -0800957PHONY += headers_check_all
958headers_check_all: headers_install_all
959 $(Q)for arch in $(HDRARCHES); do \
960 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
961 done
962
David Woodhouse68475352006-06-18 12:02:10 +0100963PHONY += headers_check
964headers_check: headers_install
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200965 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +0100966
David Woodhouse8d730cf2006-06-18 11:58:39 +0100967# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968# Modules
969
970ifdef CONFIG_MODULES
971
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200972# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973
974all: modules
975
976# Build modules
977
Paul Smith4f193362006-03-05 17:14:10 -0500978PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
980 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200981 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
983
984# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500985PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200986modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987
988# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500989PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990modules_install: _modinst_ _modinst_post
991
Paul Smith4f193362006-03-05 17:14:10 -0500992PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -0700994 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 echo "Warning: you may need to install module-init-tools"; \
996 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
997 sleep 1; \
998 fi
999 @rm -rf $(MODLIB)/kernel
1000 @rm -f $(MODLIB)/source
1001 @mkdir -p $(MODLIB)/kernel
1002 @ln -s $(srctree) $(MODLIB)/source
1003 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1004 rm -f $(MODLIB)/build ; \
1005 ln -s $(objtree) $(MODLIB)/build ; \
1006 fi
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001007 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008
1009# If System.map exists, run depmod. This deliberately does not have a
1010# dependency on System.map since that would run the dependency tree on
1011# vmlinux. This depmod is only for convenience to give the initial
1012# boot a modules.dep even before / is mounted read-write. However the
1013# boot script depmod is the master version.
1014ifeq "$(strip $(INSTALL_MOD_PATH))" ""
1015depmod_opts :=
1016else
1017depmod_opts := -b $(INSTALL_MOD_PATH) -r
1018endif
Paul Smith4f193362006-03-05 17:14:10 -05001019PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020_modinst_post: _modinst_
1021 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1022
1023else # CONFIG_MODULES
1024
1025# Modules not configured
1026# ---------------------------------------------------------------------------
1027
1028modules modules_install: FORCE
1029 @echo
1030 @echo "The present kernel configuration has modules disabled."
1031 @echo "Type 'make config' and enable loadable module support."
1032 @echo "Then build a kernel with module support enabled."
1033 @echo
1034 @exit 1
1035
1036endif # CONFIG_MODULES
1037
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038###
1039# Cleaning is done on three levels.
1040# make clean Delete most generated files
1041# Leave enough to build external modules
1042# make mrproper Delete the current configuration, and all generated files
1043# make distclean Remove editor backup files, patch leftover files and the like
1044
1045# Directories & files removed with 'make clean'
1046CLEAN_DIRS += $(MODVERDIR)
1047CLEAN_FILES += vmlinux System.map \
1048 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1049
1050# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f32006-09-16 12:15:55 -07001051MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001052MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001053 include/linux/autoconf.h include/linux/version.h \
1054 include/linux/utsrelease.h \
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001055 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056
1057# clean - Delete most, but leave enough to build external modules
1058#
1059clean: rm-dirs := $(CLEAN_DIRS)
1060clean: rm-files := $(CLEAN_FILES)
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001061clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062
Paul Smith4f193362006-03-05 17:14:10 -05001063PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064$(clean-dirs):
1065 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1066
1067clean: archclean $(clean-dirs)
1068 $(call cmd,rmdirs)
1069 $(call cmd,rmfiles)
1070 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001071 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001072 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1073 -o -name '*.symtypes' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 -type f -print | xargs rm -f
1075
1076# mrproper - Delete all generated files, including .config
1077#
1078mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1079mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1080mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1081
Paul Smith4f193362006-03-05 17:14:10 -05001082PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083$(mrproper-dirs):
1084 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1085
1086mrproper: clean archmrproper $(mrproper-dirs)
1087 $(call cmd,rmdirs)
1088 $(call cmd,rmfiles)
1089
1090# distclean
1091#
Paul Smith4f193362006-03-05 17:14:10 -05001092PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093
1094distclean: mrproper
1095 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001096 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001098 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1100 -type f -print | xargs rm -f
1101
1102
1103# Packaging of the kernel to various formats
1104# ---------------------------------------------------------------------------
1105# rpm target kept for backward compatibility
1106package-dir := $(srctree)/scripts/package
1107
Zach Brown031ecc62006-06-08 22:12:37 -07001108%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001109 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001110rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001111 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112
1113
1114# Brief documentation of the typical targets used
1115# ---------------------------------------------------------------------------
1116
1117boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1118boards := $(notdir $(boards))
1119
1120help:
1121 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001122 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001123 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001124 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001125 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 @echo ''
1127 @echo 'Configuration targets:'
1128 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1129 @echo ''
1130 @echo 'Other generic targets:'
1131 @echo ' all - Build all targets marked with [*]'
1132 @echo '* vmlinux - Build the bare kernel'
1133 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001134 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 @echo ' dir/ - Build all files in dir and below'
1136 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001137 @echo ' dir/file.ko - Build module including final link'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 @echo ' rpm - Build a kernel as an RPM package'
1139 @echo ' tags/TAGS - Generate tags file for editors'
1140 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001141 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001142 @echo ' kernelversion - Output the version stored in Makefile'
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001143 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001144 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001145 echo ' (default: $(INSTALL_HDR_PATH))'; \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001146 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 @echo ''
1148 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 @echo ' checkstack - Generate a list of stack hogs'
1150 @echo ' namespacecheck - Name space analysis on compiled kernel'
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001151 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
David Woodhousef17b7ba2006-09-21 09:01:45 +01001152 echo ' headers_check - Sanity check on exported headers'; \
1153 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 @echo ''
1155 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001156 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 @echo ''
1158 @echo 'Documentation targets:'
1159 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1160 @echo ''
1161 @echo 'Architecture specific targets ($(ARCH)):'
1162 @$(if $(archhelp),$(archhelp),\
1163 echo ' No architecture specific help defined for $(ARCH)')
1164 @echo ''
1165 @$(if $(boards), \
1166 $(foreach b, $(boards), \
1167 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1168 echo '')
1169
1170 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001171 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001173 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1174 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 @echo ''
1176 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1177 @echo 'For further info see the ./README file'
1178
1179
1180# Documentation targets
1181# ---------------------------------------------------------------------------
1182%docs: scripts_basic FORCE
1183 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1184
1185else # KBUILD_EXTMOD
1186
1187###
1188# External module support.
1189# When building external modules the kernel used as basis is considered
1190# read-only, and no consistency checks are made and the make
1191# system is not used on the basis kernel. If updates are required
1192# in the basis kernel ordinary make commands (without M=...) must
1193# be used.
1194#
1195# The following are the only valid targets when building external
1196# modules.
1197# make M=dir clean Delete all automatically generated files
1198# make M=dir modules Make all modules in specified dir
1199# make M=dir Same as 'make M=dir modules'
1200# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001201# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202# Assumes install directory is already created
1203
1204# We are always building modules
1205KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001206PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207crmodverdir:
1208 $(Q)mkdir -p $(MODVERDIR)
Pavel Roskinfca1dff2006-04-24 15:55:27 -04001209 $(Q)rm -f $(MODVERDIR)/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
Paul Smith4f193362006-03-05 17:14:10 -05001211PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212$(objtree)/Module.symvers:
1213 @test -e $(objtree)/Module.symvers || ( \
1214 echo; \
1215 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1216 echo " is missing; modules will have no dependencies and modversions."; \
1217 echo )
1218
1219module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001220PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221$(module-dirs): crmodverdir $(objtree)/Module.symvers
1222 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1223
1224modules: $(module-dirs)
1225 @echo ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001226 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
Paul Smith4f193362006-03-05 17:14:10 -05001228PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001229modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001230
Paul Smith4f193362006-03-05 17:14:10 -05001231install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1232PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001233_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001234 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001235 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236
Sam Ravnborga67dc212006-01-28 23:51:57 +01001237# Run depmod only is we have System.map and depmod is executable
1238quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1239 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1240 $(DEPMOD) -ae -F System.map \
1241 $(if $(strip $(INSTALL_MOD_PATH)), \
1242 -b $(INSTALL_MOD_PATH) -r) \
1243 $(KERNELRELEASE); \
1244 fi
1245
Paul Smith4f193362006-03-05 17:14:10 -05001246PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001247_emodinst_post: _emodinst_
1248 $(call cmd,depmod)
1249
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1251
Paul Smith4f193362006-03-05 17:14:10 -05001252PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253$(clean-dirs):
1254 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1255
1256clean: rm-dirs := $(MODVERDIR)
1257clean: $(clean-dirs)
1258 $(call cmd,rmdirs)
1259 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001260 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1262 -type f -print | xargs rm -f
1263
1264help:
1265 @echo ' Building external modules.'
1266 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1267 @echo ''
1268 @echo ' modules - default target, build the module(s)'
1269 @echo ' modules_install - install the module'
1270 @echo ' clean - remove generated files in module directory only'
1271 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001272
1273# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001274PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001275prepare: ;
1276scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277endif # KBUILD_EXTMOD
1278
1279# Generate tags for editors
1280# ---------------------------------------------------------------------------
1281
1282#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1283#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1284#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1285
George Anzingerf182ae62005-07-07 17:56:06 -07001286ifeq ($(src),$(obj))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287__srctree =
1288else
1289__srctree = $(srctree)/
1290endif
1291
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001292ifeq ($(ALLSOURCE_ARCHS),)
1293ifeq ($(ARCH),um)
1294ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1295else
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001296ALLINCLUDE_ARCHS := $(SRCARCH)
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001297endif
1298else
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001299#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001300ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1301endif
1302
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001303# Take care of arch/x86
1304ifeq ($(ARCH), $(SRCARCH))
Ian Campbella0674e82005-06-23 11:25:54 +01001305ALLSOURCE_ARCHS := $(ARCH)
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001306else
1307ALLSOURCE_ARCHS := $(ARCH) $(SRCARCH)
1308endif
Ian Campbella0674e82005-06-23 11:25:54 +01001309
Masatake YAMATOe838db62006-06-22 12:21:20 +09001310define find-sources
Don Mullisdd7e54a2007-01-04 10:14:52 -08001311 ( for ARCH in $(ALLSOURCE_ARCHS) ; do \
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001312 find $(__srctree)arch/$${SRCARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001313 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001314 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001316 -name $1 -print; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 find $(__srctree)include $(RCS_FIND_IGNORE) \
1318 \( -name config -o -name 'asm-*' \) -prune \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001319 -o -name $1 -print; \
Paolo 'Blaisorblade' Giarrusso2ab23c92005-11-13 16:07:00 -08001320 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
Thomas Gleixner2eb4c952007-10-11 11:11:38 +02001321 find $(__srctree)include/asm-$${SRCARCH} $(RCS_FIND_IGNORE) \
Masatake YAMATOe838db62006-06-22 12:21:20 +09001322 -name $1 -print; \
Ian Campbella0674e82005-06-23 11:25:54 +01001323 done ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
Don Mullisdd7e54a2007-01-04 10:14:52 -08001325 -name $1 -print; \
1326 find $(__srctree) $(RCS_FIND_IGNORE) \
1327 \( -name include -o -name arch \) -prune -o \
1328 -name $1 -print; \
1329 )
Masatake YAMATOe838db62006-06-22 12:21:20 +09001330endef
1331
1332define all-sources
1333 $(call find-sources,'*.[chS]')
1334endef
1335define all-kconfigs
1336 $(call find-sources,'Kconfig*')
1337endef
1338define all-defconfigs
1339 $(call find-sources,'defconfig')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340endef
1341
Aron Griffisda7c0402006-09-21 00:27:02 -04001342define xtags
1343 if $1 --version 2>&1 | grep -iq exuberant; then \
1344 $(all-sources) | xargs $1 -a \
1345 -I __initdata,__exitdata,__acquires,__releases \
1346 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
Aneesh Kumar K.V91b943e2006-10-17 00:10:32 -07001347 --extra=+f --c-kinds=+px \
Aneesh Kumar K.Va412c172007-07-09 11:43:57 -07001348 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001349 $(all-kconfigs) | xargs $1 -a \
1350 --langdef=kconfig \
1351 --language-force=kconfig \
1352 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001353 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001354 --langdef=dotconfig \
1355 --language-force=dotconfig \
1356 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1357 elif $1 --version 2>&1 | grep -iq emacs; then \
1358 $(all-sources) | xargs $1 -a; \
1359 $(all-kconfigs) | xargs $1 -a \
1360 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
David Gibson18e39912006-10-04 02:15:32 -07001361 $(all-defconfigs) | xargs -r $1 -a \
Aron Griffisda7c0402006-09-21 00:27:02 -04001362 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1363 else \
1364 $(all-sources) | xargs $1 -a; \
1365 fi
1366endef
1367
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368quiet_cmd_cscope-file = FILELST cscope.files
Karl Hegbloomacbef452005-06-19 00:50:47 -07001369 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
1371quiet_cmd_cscope = MAKE cscope.out
Karl Hegbloomacbef452005-06-19 00:50:47 -07001372 cmd_cscope = cscope -b
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373
1374cscope: FORCE
1375 $(call cmd,cscope-file)
1376 $(call cmd,cscope)
1377
1378quiet_cmd_TAGS = MAKE $@
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001379define cmd_TAGS
1380 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001381 $(call xtags,etags)
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001382endef
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383
Sam Ravnborg66d609e2005-07-28 23:11:34 +02001384TAGS: FORCE
1385 $(call cmd,TAGS)
1386
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387quiet_cmd_tags = MAKE $@
1388define cmd_tags
1389 rm -f $@; \
Aron Griffisda7c0402006-09-21 00:27:02 -04001390 $(call xtags,ctags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391endef
1392
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393tags: FORCE
1394 $(call cmd,tags)
1395
1396
1397# Scripts to check various things for consistency
1398# ---------------------------------------------------------------------------
1399
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400includecheck:
1401 find * $(RCS_FIND_IGNORE) \
1402 -name '*.[hcS]' -type f -print | sort \
1403 | xargs $(PERL) -w scripts/checkincludes.pl
1404
1405versioncheck:
1406 find * $(RCS_FIND_IGNORE) \
1407 -name '*.[hcS]' -type f -print | sort \
1408 | xargs $(PERL) -w scripts/checkversion.pl
1409
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410namespacecheck:
1411 $(PERL) $(srctree)/scripts/namespace.pl
1412
1413endif #ifeq ($(config-targets),1)
1414endif #ifeq ($(mixed-targets),1)
1415
Roman Zippelc30a02e2006-06-08 22:12:50 -07001416PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001417
Jeff Dike011e3a92006-12-13 00:34:12 -08001418# UML needs a little special treatment here. It wants to use the host
1419# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1420# else wants $(ARCH), including people doing cross-builds, which means
1421# that $(SUBARCH) doesn't work here.
1422ifeq ($(ARCH), um)
1423CHECKSTACK_ARCH := $(SUBARCH)
1424else
1425CHECKSTACK_ARCH := $(ARCH)
1426endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427checkstack:
1428 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001429 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430
1431kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001432 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1433 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001434kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001435 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436
Sam Ravnborg06300b22006-01-25 07:13:18 +01001437# Single targets
1438# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001439# Single targets are compatible with:
1440# - build whith mixed source and output
1441# - build with separate output dir 'make O=...'
1442# - external modules
1443#
1444# target-dir => where to store outputfile
1445# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001446
Sam Ravnborg06300b22006-01-25 07:13:18 +01001447ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001448 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001449 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001450else
1451 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001452 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1453 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001454endif
1455
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001456%.s: %.c prepare scripts FORCE
1457 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1458%.i: %.c prepare scripts FORCE
1459 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1460%.o: %.c prepare scripts FORCE
1461 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1462%.lst: %.c prepare scripts FORCE
1463 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1464%.s: %.S prepare scripts FORCE
1465 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1466%.o: %.S prepare scripts FORCE
1467 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001468%.symtypes: %.c prepare scripts FORCE
1469 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001470
1471# Modules
1472/ %/: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001473 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001474 $(build)=$(build-dir)
1475%.ko: prepare scripts FORCE
Sam Ravnborg06300b22006-01-25 07:13:18 +01001476 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001477 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001478 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001479
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480# FIXME Should go into a make.lib or something
1481# ===========================================================================
1482
1483quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1484 cmd_rmdirs = rm -rf $(rm-dirs)
1485
1486quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1487 cmd_rmfiles = rm -f $(rm-files)
1488
1489
1490a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1491 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001492 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493
1494quiet_cmd_as_o_S = AS $@
1495cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1496
1497# read all saved command lines
1498
1499targets := $(wildcard $(sort $(targets)))
1500cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1501
1502ifneq ($(cmd_files),)
1503 $(cmd_files): ; # Do not try to update included dependency files
1504 include $(cmd_files)
1505endif
1506
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1508# Usage:
1509# $(Q)$(MAKE) $(clean)=dir
1510clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1511
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512endif # skip-makefile
1513
Paul Smith4f193362006-03-05 17:14:10 -05001514PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001516
Oleg Verych15964862006-12-10 02:18:40 -08001517# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1518Makefile: ;
Paul Smith4f193362006-03-05 17:14:10 -05001519
1520# Declare the contents of the .PHONY variable as phony. We keep that
1521# information in a variable se we can use it in if_changed and friends.
1522.PHONY: $(PHONY)