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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldsc8ddb272010-11-01 07:54:12 -04003SUBLEVEL = 37
4EXTRAVERSION = -rc1
Linus Torvaldscd072022010-10-14 16:26:43 -07005NAME = Flesh-Eating Bats with Fangs
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
Linus Nilssond384e352008-01-20 17:10:01 +010015# (this increases performance and avoids hard-to-debug behaviour);
Oleg Verych15964862006-12-10 02:18:40 -080016# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
H. Peter Anvinc0513462009-12-17 06:56:11 -080019# Avoid funny character set dependencies
H. Peter Anvin06b5dc62009-12-17 15:51:37 -080020unexport LC_ALL
H. Peter Anvinc0513462009-12-17 06:56:11 -080021LC_COLLATE=C
22LC_NUMERIC=C
Michal Marek07105202010-01-08 12:25:37 +010023export LC_COLLATE LC_NUMERIC
H. Peter Anvinc0513462009-12-17 06:56:11 -080024
Linus Torvalds1da177e2005-04-16 15:20:36 -070025# We are using a recursive build, so we need to do a little thinking
26# to get the ordering right.
27#
28# Most importantly: sub-Makefiles should only ever modify files in
29# their own directory. If in some directory we have a dependency on
30# a file in another dir (which doesn't happen often, but it's often
31# unavoidable when linking the built-in.o targets which finally
32# turn into vmlinux), we will call a sub make in that other dir, and
33# after that we are sure that everything which is in that other dir
34# is now up to date.
35#
36# The only cases where we need to modify files which have global
37# effects are thus separated out and done before the recursive
38# descending is started. They are now explicitly listed as the
39# prepare rule.
40
41# To put more focus on warnings, be less verbose as default
42# Use 'make V=1' to see the full commands
43
Cheng Renquanb8b06182009-05-26 16:03:07 +080044ifeq ("$(origin V)", "command line")
45 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046endif
47ifndef KBUILD_VERBOSE
48 KBUILD_VERBOSE = 0
49endif
50
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040051# Call a source code checker (by default, "sparse") as part of the
52# C compilation.
53#
54# Use 'make C=1' to enable checking of only re-compiled files.
55# Use 'make C=2' to enable checking of *all* source files, regardless
56# of whether they are re-compiled or not.
57#
58# See the file "Documentation/sparse.txt" for more details, including
59# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Cheng Renquanb8b06182009-05-26 16:03:07 +080061ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063endif
64ifndef KBUILD_CHECKSRC
65 KBUILD_CHECKSRC = 0
66endif
67
68# Use make M=dir to specify directory of external module to build
69# Old syntax make ... SUBDIRS=$PWD is still supported
70# Setting the environment variable KBUILD_EXTMOD take precedence
71ifdef SUBDIRS
72 KBUILD_EXTMOD ?= $(SUBDIRS)
73endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Cheng Renquanb8b06182009-05-26 16:03:07 +080075ifeq ("$(origin M)", "command line")
76 KBUILD_EXTMOD := $(M)
77endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020084#
Linus Torvalds1da177e2005-04-16 15:20:36 -070085# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(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?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800101ifeq ("$(origin O)", "command line")
102 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103endif
104
105# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500106PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107_all:
108
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100109# Cancel implicit rules on top Makefile
110$(CURDIR)/Makefile Makefile: ;
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112ifneq ($(KBUILD_OUTPUT),)
113# Invoke a second make in the output directory, passing relevant variables
114# check that the output directory actually exists
115saved-output := $(KBUILD_OUTPUT)
116KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
117$(if $(KBUILD_OUTPUT),, \
118 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Milton Miller0b357862007-09-21 18:09:02 -0500120PHONY += $(MAKECMDGOALS) sub-make
121
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100122$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500123 $(Q)@:
124
125sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200126 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
127 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500128 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
129 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
131# Leave processing to above invocation of make
132skip-makefile := 1
133endif # ifneq ($(KBUILD_OUTPUT),)
134endif # ifeq ($(KBUILD_SRC),)
135
136# We process the rest of the Makefile if this is the final invocation of make
137ifeq ($(skip-makefile),)
138
139# If building an external module we do not care about the all: rule
140# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500141PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142ifeq ($(KBUILD_EXTMOD),)
143_all: all
144else
145_all: modules
146endif
147
148srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149objtree := $(CURDIR)
150src := $(srctree)
151obj := $(objtree)
152
Mattia Dongili0f558c32006-02-19 13:50:37 +0100153VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
Amerigo Wang11294232009-06-19 03:40:26 -0400155export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
158# SUBARCH tells the usermode build what the underlying arch is. That is set
159# first, and if a usermode build is happening, the "ARCH=um" on the command
160# line overrides the setting of ARCH below. If a native build is happening,
161# then ARCH is assigned, getting whatever value it gets normally, and
162# SUBARCH is subsequently ignored.
163
164SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
165 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800166 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900167 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt3cc000b2009-04-11 08:39:27 +0900168 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170# Cross compiling and selecting different set of gcc/bin-utils
171# ---------------------------------------------------------------------------
172#
173# When performing cross compilation for other architectures ARCH shall be set
174# to the target architecture. (See arch/* for the possibilities).
175# ARCH can be set during invocation of make:
176# make ARCH=ia64
177# Another way is to have ARCH set in the environment.
178# The default ARCH is the host where make is executed.
179
180# CROSS_COMPILE specify the prefix used for all executables used
181# during compilation. Only gcc and related bin-utils executables
182# are prefixed with $(CROSS_COMPILE).
183# CROSS_COMPILE can be set on the command line
184# make CROSS_COMPILE=ia64-linux-
185# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800186# A third alternative is to store a setting in .config so that plain
187# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188# Default value for CROSS_COMPILE is not to prefix executables
189# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100190export KBUILD_BUILDHOST := $(SUBARCH)
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200191ARCH ?= $(SUBARCH)
Roland McGrath84336462009-12-21 16:24:06 -0800192CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
194# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200195UTS_MACHINE := $(ARCH)
196SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Sam Ravnborgd746d642007-11-12 20:14:19 +0100198# Additional ARCH settings for x86
199ifeq ($(ARCH),i386)
200 SRCARCH := x86
201endif
202ifeq ($(ARCH),x86_64)
203 SRCARCH := x86
204endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200205
Sam Ravnborg5e538792008-12-02 23:17:12 -0800206# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000207ifeq ($(ARCH),sparc32)
208 SRCARCH := sparc
209endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200210ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800211 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200212endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200213
Paul Mundt3cc000b2009-04-11 08:39:27 +0900214# Additional ARCH settings for sh
215ifeq ($(ARCH),sh64)
216 SRCARCH := sh
217endif
218
Sam Ravnborg5e538792008-12-02 23:17:12 -0800219# Where to locate arch specific headers
220hdr-arch := $(SRCARCH)
221
Sam Ravnborg49148022009-01-16 21:58:10 +1000222ifeq ($(ARCH),m68knommu)
223 hdr-arch := m68k
224endif
225
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700226KCONFIG_CONFIG ?= .config
227
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228# SHELL used by kbuild
229CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
230 else if [ -x /bin/bash ]; then echo /bin/bash; \
231 else echo sh; fi ; fi)
232
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200233HOSTCC = gcc
234HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800235HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200236HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200238# Decide whether to build built-in, modular, or both.
239# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
241KBUILD_MODULES :=
242KBUILD_BUILTIN := 1
243
244# If we have only "make modules", don't compile built-in objects.
245# When we're building modules with modversions, we need to consider
246# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200247# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
249ifeq ($(MAKECMDGOALS),modules)
250 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
251endif
252
253# If we have "make <whatever> modules", compile modules
254# in addition to whatever we do anyway.
255# Just "make" or "make all" shall build modules as well
256
257ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
258 KBUILD_MODULES := 1
259endif
260
261ifeq ($(MAKECMDGOALS),)
262 KBUILD_MODULES := 1
263endif
264
Sam Ravnborge579d352005-07-27 08:10:10 +0200265export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
267
268# Beautify output
269# ---------------------------------------------------------------------------
270#
271# Normally, we echo the whole command before executing it. By making
272# that echo $($(quiet)$(cmd)), we now have the possibility to set
273# $(quiet) to choose other forms of output instead, e.g.
274#
275# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
276# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
277#
278# If $(quiet) is empty, the whole command will be printed.
279# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200280# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281# the variable $(silent_cmd_cc_o_c) doesn't exist.
282#
Adrian Bunka58a4142006-01-10 00:08:17 +0100283# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284# for commands that shall be hidden in non-verbose mode.
285#
286# $(Q)ln $@ :<
287#
288# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
289# If KBUILD_VERBOSE equals 1 then the above command is displayed.
290
291ifeq ($(KBUILD_VERBOSE),1)
292 quiet =
293 Q =
294else
295 quiet=quiet_
296 Q = @
297endif
298
299# If the user is running make -s (silent mode), suppress echoing of
300# commands
301
302ifneq ($(findstring s,$(MAKEFLAGS)),)
303 quiet=silent_
304endif
305
306export quiet Q KBUILD_VERBOSE
307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
309# Look for make include files relative to root of kernel src
310MAKEFLAGS += --include-dir=$(srctree)
311
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100312# We need some generic definitions (do not try to remake the file).
313$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800314include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
316# Make variables (CC, etc...)
317
318AS = $(CROSS_COMPILE)as
319LD = $(CROSS_COMPILE)ld
320CC = $(CROSS_COMPILE)gcc
321CPP = $(CC) -E
322AR = $(CROSS_COMPILE)ar
323NM = $(CROSS_COMPILE)nm
324STRIP = $(CROSS_COMPILE)strip
325OBJCOPY = $(CROSS_COMPILE)objcopy
326OBJDUMP = $(CROSS_COMPILE)objdump
327AWK = awk
328GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200329INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330DEPMOD = /sbin/depmod
331KALLSYMS = scripts/kallsyms
332PERL = perl
333CHECK = sparse
334
Hannes Eder80a7d1d92008-12-27 22:38:44 +0100335CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
336 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200337CFLAGS_MODULE =
338AFLAGS_MODULE =
339LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340CFLAGS_KERNEL =
341AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700342CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344
345# Use LINUXINCLUDE when you must reference the include/ directory.
346# Needed to be compatible with the O= option
Sam Ravnborg24a675e2009-10-17 21:14:18 +0200347LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
Sam Ravnborg96f13042009-10-17 22:33:27 +0200348 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200349 -include include/generated/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100351KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200353KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700354 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300355 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800356 -Wno-format-security \
357 -fno-delete-null-pointer-checks
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200358KBUILD_AFLAGS_KERNEL :=
359KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200360KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200361KBUILD_AFLAGS_MODULE := -DMODULE
362KBUILD_CFLAGS_MODULE := -DMODULE
363KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700365# Read KERNELRELEASE from include/config/kernel.release (if it exists)
366KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100367KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100368
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200369export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100370export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200371export CPP AR NM STRIP OBJCOPY OBJDUMP
372export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200373export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
Sam Ravnborg06c50402007-10-15 22:17:25 +0200375export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700376export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200377export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200378export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200379export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381# When compiling out-of-tree modules, put MODVERDIR in the module
382# tree rather than in the kernel tree. The kernel tree might
383# even be read-only.
384export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386# Files to ignore in find ... statements
387
Trond Myklebust406119f2005-10-27 14:46:53 -0400388RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
389export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
391# ===========================================================================
392# Rules shared between *config targets and build targets
393
394# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500395PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396scripts_basic:
397 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500398 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200400# To avoid any implicit rule to kick in, define an empty command.
401scripts/basic/%: scripts_basic ;
402
Paul Smith4f193362006-03-05 17:14:10 -0500403PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200404# outputmakefile generates a Makefile in the output directory, if using a
405# separate output directory. This allows convenient use of make in the
406# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200408ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100409 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200410 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
411 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
412endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
414# To make sure we do not include .config for any of the *config targets
415# catch them early, and hand them over to scripts/kconfig/Makefile
416# It is allowed to specify more targets when calling make, including
417# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200418# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419# Detect when mixed targets is specified, and make a second invocation
420# of make so .config is not included in this case either (for *config).
421
Roman Zippel3eb3c742007-01-10 14:45:28 +0100422no-dot-config-targets := clean mrproper distclean \
Nicolas Palix74425ee2010-06-06 17:15:01 +0200423 cscope TAGS tags help %docs check% coccicheck \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100424 include/linux/version.h headers_% \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700425 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
427config-targets := 0
428mixed-targets := 0
429dot-config := 1
430
431ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
432 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
433 dot-config := 0
434 endif
435endif
436
437ifeq ($(KBUILD_EXTMOD),)
438 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
439 config-targets := 1
440 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
441 mixed-targets := 1
442 endif
443 endif
444endif
445
446ifeq ($(mixed-targets),1)
447# ===========================================================================
448# We're called with mixed targets (*config and build targets).
449# Handle them one by one.
450
451%:: FORCE
452 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
453
454else
455ifeq ($(config-targets),1)
456# ===========================================================================
457# *config targets only - make sure prerequisites are updated, and descend
458# in scripts/kconfig to make the *config target
459
460# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
461# KBUILD_DEFCONFIG may point out an alternative default configuration
462# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200463include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400464export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100466config: scripts_basic outputmakefile FORCE
467 $(Q)mkdir -p include/linux include/config
468 $(Q)$(MAKE) $(build)=scripts/kconfig $@
469
470%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700471 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 $(Q)$(MAKE) $(build)=scripts/kconfig $@
473
474else
475# ===========================================================================
476# Build targets only - this includes vmlinux, arch specific targets, clean
477# targets and others. In general all targets except *config targets.
478
479ifeq ($(KBUILD_EXTMOD),)
480# Additional helpers built in scripts/
481# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200482# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500483PHONY += scripts
Michal Marekbc081dd2009-12-07 16:38:33 +0100484scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 $(Q)$(MAKE) $(build)=$(@)
486
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487# Objects we will link into vmlinux / subdirs we need to visit
488init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100489drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490net-y := net/
491libs-y := lib/
492core-y := usr/
493endif # KBUILD_EXTMOD
494
495ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200496# Read in config
497-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200499ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500# Read in dependencies to all Kconfig* files, make sure to run
501# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700502-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700505$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506
Roman Zippelc955cca2006-06-08 22:12:39 -0700507# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100508# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200509# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100510# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100511include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
513else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200514# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200515# but do not care if they are up-to-date. Use auto.conf to trigger the test
516PHONY += include/config/auto.conf
517
518include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200519 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200520 echo; \
521 echo " ERROR: Kernel configuration is invalid."; \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200522 echo " include/generated/autoconf.h or $@ are missing.";\
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200523 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
524 echo; \
525 /bin/false)
526
527endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529else
530# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700531include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200532endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
534# The all: target is the default when no target is given on the
535# command line.
536# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200537# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538all: vmlinux
539
540ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200541KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200543KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544endif
545
Ralf Baechlebef5b542008-07-16 13:02:24 +0100546include $(srctree)/arch/$(SRCARCH)/Makefile
547
Mike Frysinger08f67462009-06-04 16:29:08 -0700548ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100549KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
550endif
551
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100552# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900553ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100554KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900555endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100556
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200558KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100560# Some targets (ARM with Thumb2, for example), can't be built with frame
561# pointers. For those, we don't have FUNCTION_TRACER automatically
562# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
563# incompatible with -fomit-frame-pointer with current GCC, so we don't use
564# -fomit-frame-pointer with FUNCTION_TRACER.
565ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200566KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100568endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
570ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200571KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200572KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573endif
574
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200575ifdef CONFIG_DEBUG_INFO_REDUCED
576KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
577endif
578
Steven Rostedt606576c2008-10-06 19:06:12 -0400579ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200580KBUILD_CFLAGS += -pg
Steven Rostedt72441cb2010-10-13 17:12:30 -0400581ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400582 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400583 BUILD_C_RECORDMCOUNT := y
584 export BUILD_C_RECORDMCOUNT
585 endif
586endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200587endif
588
Sam Ravnborg91341d42008-01-21 21:31:44 +0100589# We trigger additional mismatches with less inlining
590ifdef CONFIG_DEBUG_SECTION_MISMATCH
591KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
592endif
593
Sam Ravnborge8e69932005-04-30 16:51:42 -0700594# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700595NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700596CHECKFLAGS += $(NOSTDINC_FLAGS)
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200599KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200601# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200602KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400604# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700605KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700606
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700607# conserve stack if available
608KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
609
Jason Baronbf5438fc2010-09-17 11:09:00 -0400610# check for 'asm goto'
611ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
612 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
613endif
614
Sam Ravnborg06c50402007-10-15 22:17:25 +0200615# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100616# But warn user when we do so
617warn-assign = \
618$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
619
620ifneq ($(KCPPFLAGS),)
621 $(call warn-assign,CPPFLAGS)
622 KBUILD_CPPFLAGS += $(KCPPFLAGS)
623endif
624ifneq ($(KAFLAGS),)
625 $(call warn-assign,AFLAGS)
626 KBUILD_AFLAGS += $(KAFLAGS)
627endif
628ifneq ($(KCFLAGS),)
629 $(call warn-assign,CFLAGS)
630 KBUILD_CFLAGS += $(KCFLAGS)
631endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200632
Roland McGrath18991192007-07-19 01:48:40 -0700633# Use --build-id when available.
634LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200635 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200636KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700637LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
638
David Howells5d7d18f2009-03-04 11:59:07 -0800639ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200640LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800641endif
642
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200644# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645# set in the environment
646# Also any assignments in arch/$(ARCH)/Makefile take precedence over
647# this default value
648export KBUILD_IMAGE ?= vmlinux
649
650#
651# INSTALL_PATH specifies where to place the updated kernel and system map
652# images. Default is /boot, but you can set it to other values
653export INSTALL_PATH ?= /boot
654
655#
656# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
657# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200658# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659#
660
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100661MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662export MODLIB
663
Theodore Ts'oac031f22006-06-21 20:53:09 -0400664#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100665# INSTALL_MOD_STRIP, if defined, will cause modules to be
666# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
667# the default option --strip-debug will be used. Otherwise,
668# INSTALL_MOD_STRIP will used as the options to the strip command.
669
Theodore Ts'oac031f22006-06-21 20:53:09 -0400670ifdef INSTALL_MOD_STRIP
671ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100672mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400673else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100674mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400675endif # INSTALL_MOD_STRIP=1
676else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100677mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400678endif # INSTALL_MOD_STRIP
679export mod_strip_cmd
680
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681
682ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100683core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
685vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
686 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
687 $(net-y) $(net-m) $(libs-y) $(libs-m)))
688
689vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
690 $(init-n) $(init-) \
691 $(core-n) $(core-) $(drivers-n) $(drivers-) \
692 $(net-n) $(net-) $(libs-n) $(libs-))))
693
694init-y := $(patsubst %/, %/built-in.o, $(init-y))
695core-y := $(patsubst %/, %/built-in.o, $(core-y))
696drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
697net-y := $(patsubst %/, %/built-in.o, $(net-y))
698libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
699libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
700libs-y := $(libs-y1) $(libs-y2)
701
702# Build vmlinux
703# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200704# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200706# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707# Ordering when linking is important, and $(vmlinux-init) must be first.
708#
709# vmlinux
710# ^
711# |
712# +-< $(vmlinux-init)
713# | +--< init/version.o + more
714# |
715# +--< $(vmlinux-main)
716# | +--< driver/built-in.o mm/built-in.o + more
717# |
718# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
719#
720# vmlinux version (uname -v) cannot be updated during normal
721# descending-into-subdirs phase since we do not yet know if we need to
722# update vmlinux.
723# Therefore this step is delayed until just before final link of vmlinux -
724# except in the kallsyms case where it is done just before adding the
725# symbols to the kernel.
726#
727# System.map is generated to document addresses of all kernel symbols
728
729vmlinux-init := $(head-y) $(init-y)
730vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
731vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200732vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100733export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734
735# Rule to link vmlinux - also used during CONFIG_KALLSYMS
736# May be overridden by arch/$(ARCH)/Makefile
737quiet_cmd_vmlinux__ ?= LD $@
738 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
739 -T $(vmlinux-lds) $(vmlinux-init) \
740 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200741 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742
743# Generate new vmlinux version
744quiet_cmd_vmlinux_version = GEN .version
745 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200746 if [ ! -r .version ]; then \
747 rm -f .version; \
748 echo 1 >.version; \
749 else \
750 mv .version .old_version; \
751 expr 0$$(cat .old_version) + 1 >.version; \
752 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 $(MAKE) $(build)=init
754
755# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200756quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
758
759# Link of vmlinux
760# If CONFIG_KALLSYMS is set .version is already updated
761# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700762# Use + in front of the vmlinux_version rule to silent warning with make -j2
763# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700765 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
767
768 $(call cmd,vmlinux__)
769 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
770
Sam Ravnborg46352812006-08-08 21:41:18 +0200771 $(Q)$(if $($(quiet)cmd_sysmap), \
772 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
773 $(cmd_sysmap) $@ System.map; \
774 if [ $$? -ne 0 ]; then \
775 rm -f $@; \
776 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 fi;
778 $(verify_kallsyms)
779endef
780
781
782ifdef CONFIG_KALLSYMS
783# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
784# It's a three stage process:
785# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
786# empty
787# Running kallsyms on that gives us .tmp_kallsyms1.o with
788# the right size - vmlinux version (uname -v) is updated during this step
789# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
790# but due to the added section, some addresses have shifted.
791# From here, we generate a correct .tmp_kallsyms2.o
792# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
793# o Verify that the System.map from vmlinux matches the map from
794# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
795# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
796# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
797# temporary bypass to allow the kernel to be built while the
798# maintainers work out what went wrong with kallsyms.
799
800ifdef CONFIG_KALLSYMS_EXTRA_PASS
801last_kallsyms := 3
802else
803last_kallsyms := 2
804endif
805
806kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
807
808define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200809 $(Q)$(if $($(quiet)cmd_sysmap), \
810 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200812 $(Q)cmp -s System.map .tmp_System.map || \
813 (echo Inconsistent kallsyms data; \
814 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 rm .tmp_kallsyms* ; /bin/false )
816endef
817
818# Update vmlinux version before link
819# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200820# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821cmd_ksym_ld = $(cmd_vmlinux__)
822define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200823 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 +$(call cmd,vmlinux_version)
825 $(call cmd,vmlinux__)
826 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
827endef
828
829# Generate .S file with all kernel symbols
830quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100831 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
832 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100834.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 $(call if_changed_dep,as_o_S)
836
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100837.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 $(call cmd,kallsyms)
839
840# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100841.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
842 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100844.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
845 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100847.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
848 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
850# Needs to visit scripts/ before $(KALLSYMS) can be used.
851$(KALLSYMS): scripts ;
852
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000853# Generate some data for debugging strange kallsyms problems
854debug_kallsyms: .tmp_map$(last_kallsyms)
855
856.tmp_map%: .tmp_vmlinux% FORCE
857 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
858
859.tmp_map3: .tmp_map2
860
861.tmp_map2: .tmp_map1
862
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863endif # ifdef CONFIG_KALLSYMS
864
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200865# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
866# relevant sections renamed as per the linker script.
867quiet_cmd_vmlinux-modpost = LD $@
868 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
869 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200870 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200871define rule_vmlinux-modpost
872 :
873 +$(call cmd,vmlinux-modpost)
874 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
875 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
876endef
877
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100879vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700880ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100881 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700882endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700883ifdef CONFIG_SAMPLES
884 $(Q)$(MAKE) $(build)=samples
885endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700886ifdef CONFIG_BUILD_DOCSRC
887 $(Q)$(MAKE) $(build)=Documentation
888endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200889 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200891 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
Sam Ravnborg310f8242008-01-21 22:57:09 +0100893# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100894ifdef CONFIG_KALLSYMS
895.tmp_vmlinux1: vmlinux.o
896endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200897
898modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
899vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200900 $(call if_changed_rule,vmlinux-modpost)
901
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902# The actual objects are generated when descending,
903# make sure no implicit rule kicks in
904$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
905
906# Handle descending into subdirectories listed in $(vmlinux-dirs)
907# Preset locale variables to speed up the build process. Limit locale
908# tweaks to this spot to avoid wrong language settings when running
909# make menuconfig etc.
910# Error messages still appears in the original language
911
Paul Smith4f193362006-03-05 17:14:10 -0500912PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200913$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 $(Q)$(MAKE) $(build)=$@
915
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700916# Store (new) KERNELRELASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700917include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100918 $(Q)rm -f $@
Michal Marek7263e712010-07-05 23:43:04 +0200919 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100920
921
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200923# or the modules are listed in "prepare".
924# A multi level approach is used. prepareN is processed before prepareN-1.
925# archprepare is used in arch Makefiles and when processed asm symlink,
926# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200928# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500929PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200930
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200931# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932# and if so do:
933# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700934prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500936 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700937 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 echo " $(srctree) is not clean, please run 'make mrproper'";\
939 echo " in the '$(srctree)' directory.";\
940 /bin/false; \
941 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942endif
943
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200944# prepare2 creates a makefile if using a separate output directory
945prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
Sam Ravnborg273b2812009-10-18 00:52:28 +0200947prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200948 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200949 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200951archprepare: prepare1 scripts_basic
952
953prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200954 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200955 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200956
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800958prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960# Generate some files
961# ---------------------------------------------------------------------------
962
963# KERNELRELEASE can change from a few different places, meaning version.h
964# needs to be updated, so this check is forced on all builds
965
966uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200967define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200969 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
970 exit 1; \
971 fi; \
972 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973endef
974
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200975define filechk_version.h
976 (echo \#define LINUX_VERSION_CODE $(shell \
977 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
978 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
979endef
980
981include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 $(call filechk,version.h)
983
Sam Ravnborg273b2812009-10-18 00:52:28 +0200984include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200985 $(call filechk,utsrelease.h)
986
Vegard Nossum179efcb2008-12-16 12:33:43 +0100987PHONY += headerdep
988headerdep:
989 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
990
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991# ---------------------------------------------------------------------------
992
Paul Smith4f193362006-03-05 17:14:10 -0500993PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994depend dep:
995 @echo '*** Warning: make $@ is unnecessary now.'
996
997# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +0300998# Firmware install
999INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1000export INSTALL_FW_PATH
1001
1002PHONY += firmware_install
1003firmware_install: FORCE
1004 @mkdir -p $(objtree)/firmware
1005 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1006
1007# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001008# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001009
Sam Ravnborge6883b12008-06-05 16:43:46 +02001010#Default location for installed headers
1011export INSTALL_HDR_PATH = $(objtree)/usr
1012
Sam Ravnborge6883b12008-06-05 16:43:46 +02001013hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001014
1015# If we do an all arch process set dst to asm-$(hdr-arch)
1016hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001017
1018PHONY += __headers
1019__headers: include/linux/version.h scripts_basic FORCE
1020 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001021
1022PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001023headers_install_all:
1024 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001025
David Woodhouse8d730cf2006-06-18 11:58:39 +01001026PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001027headers_install: __headers
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001028 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001029 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001030 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001031 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001032
Mike Frysinger1f857122007-02-14 00:33:02 -08001033PHONY += headers_check_all
1034headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001035 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001036
David Woodhouse68475352006-06-18 12:02:10 +01001037PHONY += headers_check
1038headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001039 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001040 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001041
David Woodhouse8d730cf2006-06-18 11:58:39 +01001042# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043# Modules
1044
1045ifdef CONFIG_MODULES
1046
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001047# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048
Michal Marek73d13932010-03-10 12:28:58 +01001049all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050
1051# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001052#
1053# A module can be listed more than once in obj-m resulting in
1054# duplicate lines in modules.order files. Those are removed
1055# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056
Paul Smith4f193362006-03-05 17:14:10 -05001057PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001058modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001059 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001060 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001061 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001062 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063
Michal Mareka6c36632010-03-08 10:07:12 +01001064modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1065 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1066
Michal Marek73d13932010-03-10 12:28:58 +01001067%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001068 $(Q)$(MAKE) $(modbuiltin)=$*
1069
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
1071# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001072PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001073modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074
1075# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001076PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077modules_install: _modinst_ _modinst_post
1078
Paul Smith4f193362006-03-05 17:14:10 -05001079PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001080_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001081 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 echo "Warning: you may need to install module-init-tools"; \
1083 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1084 sleep 1; \
1085 fi
1086 @rm -rf $(MODLIB)/kernel
1087 @rm -f $(MODLIB)/source
1088 @mkdir -p $(MODLIB)/kernel
1089 @ln -s $(srctree) $(MODLIB)/source
1090 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1091 rm -f $(MODLIB)/build ; \
1092 ln -s $(objtree) $(MODLIB)/build ; \
1093 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001094 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001095 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001096 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001098# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099# boot a modules.dep even before / is mounted read-write. However the
1100# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001101PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001103 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001104 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105
1106else # CONFIG_MODULES
1107
1108# Modules not configured
1109# ---------------------------------------------------------------------------
1110
1111modules modules_install: FORCE
1112 @echo
1113 @echo "The present kernel configuration has modules disabled."
1114 @echo "Type 'make config' and enable loadable module support."
1115 @echo "Then build a kernel with module support enabled."
1116 @echo
1117 @exit 1
1118
1119endif # CONFIG_MODULES
1120
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121###
1122# Cleaning is done on three levels.
1123# make clean Delete most generated files
1124# Leave enough to build external modules
1125# make mrproper Delete the current configuration, and all generated files
1126# make distclean Remove editor backup files, patch leftover files and the like
1127
1128# Directories & files removed with 'make clean'
1129CLEAN_DIRS += $(MODVERDIR)
1130CLEAN_FILES += vmlinux System.map \
1131 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1132
1133# Directories & files removed with 'make mrproper'
Sam Ravnborg96f13042009-10-17 22:33:27 +02001134MRPROPER_DIRS += include/config usr/include include/generated
Sam Ravnborgf7f16b72009-10-18 00:00:43 +02001135MRPROPER_FILES += .config .config.old .version .old_version \
Sam Ravnborg264a2682009-10-18 00:49:24 +02001136 include/linux/version.h \
Wenji Huang8723eae2009-11-19 08:44:32 +08001137 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138
1139# clean - Delete most, but leave enough to build external modules
1140#
1141clean: rm-dirs := $(CLEAN_DIRS)
1142clean: rm-files := $(CLEAN_FILES)
Michal Marekc47f2142010-09-03 15:00:22 +02001143clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144
Paul Smith4f193362006-03-05 17:14:10 -05001145PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146$(clean-dirs):
1147 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1148
Michal Marek88d7be02010-09-06 12:00:08 +02001149clean: archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150
1151# mrproper - Delete all generated files, including .config
1152#
1153mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1154mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1155mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1156
Paul Smith4f193362006-03-05 17:14:10 -05001157PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158$(mrproper-dirs):
1159 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1160
1161mrproper: clean archmrproper $(mrproper-dirs)
1162 $(call cmd,rmdirs)
1163 $(call cmd,rmfiles)
1164
1165# distclean
1166#
Paul Smith4f193362006-03-05 17:14:10 -05001167PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
1169distclean: mrproper
1170 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001171 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001173 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1175 -type f -print | xargs rm -f
1176
1177
1178# Packaging of the kernel to various formats
1179# ---------------------------------------------------------------------------
1180# rpm target kept for backward compatibility
1181package-dir := $(srctree)/scripts/package
1182
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001183%src-pkg: FORCE
1184 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001185%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001186 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001187rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001188 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189
1190
1191# Brief documentation of the typical targets used
1192# ---------------------------------------------------------------------------
1193
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001194boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001195boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001196board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1197board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198
1199help:
1200 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001201 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001202 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001203 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001204 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 @echo ''
1206 @echo 'Configuration targets:'
1207 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1208 @echo ''
1209 @echo 'Other generic targets:'
1210 @echo ' all - Build all targets marked with [*]'
1211 @echo '* vmlinux - Build the bare kernel'
1212 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001213 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001214 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1215 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001217 @echo ' dir/file.[oisS] - Build specified target only'
1218 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1219 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001220 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001221 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 @echo ' tags/TAGS - Generate tags file for editors'
1223 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001224 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001225 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001226 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001227 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001228 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 @echo ' checkstack - Generate a list of stack hogs'
1231 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001232 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001233 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001234 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001235 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001236 @echo ' headerdep - Detect inclusion cycles in headers'
1237 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1238 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001240 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 @echo ''
1242 @echo 'Documentation targets:'
1243 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1244 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001245 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001247 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 @echo ''
1249 @$(if $(boards), \
1250 $(foreach b, $(boards), \
1251 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1252 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001253 @$(if $(board-dirs), \
1254 $(foreach b, $(board-dirs), \
1255 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1256 printf " %-16s - Show all of the above\\n" help-boards; \
1257 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
1259 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001260 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001262 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1263 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 @echo ''
1265 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1266 @echo 'For further info see the ./README file'
1267
1268
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001269help-board-dirs := $(addprefix help-,$(board-dirs))
1270
1271help-boards: $(help-board-dirs)
1272
1273boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1274
1275$(help-board-dirs): help-%:
1276 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1277 @$(if $(boards-per-dir), \
1278 $(foreach b, $(boards-per-dir), \
1279 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1280 echo '')
1281
1282
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283# Documentation targets
1284# ---------------------------------------------------------------------------
1285%docs: scripts_basic FORCE
1286 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1287
1288else # KBUILD_EXTMOD
1289
1290###
1291# External module support.
1292# When building external modules the kernel used as basis is considered
1293# read-only, and no consistency checks are made and the make
1294# system is not used on the basis kernel. If updates are required
1295# in the basis kernel ordinary make commands (without M=...) must
1296# be used.
1297#
1298# The following are the only valid targets when building external
1299# modules.
1300# make M=dir clean Delete all automatically generated files
1301# make M=dir modules Make all modules in specified dir
1302# make M=dir Same as 'make M=dir modules'
1303# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001304# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305# Assumes install directory is already created
1306
1307# We are always building modules
1308KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001309PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001311 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312
Paul Smith4f193362006-03-05 17:14:10 -05001313PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314$(objtree)/Module.symvers:
1315 @test -e $(objtree)/Module.symvers || ( \
1316 echo; \
1317 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1318 echo " is missing; modules will have no dependencies and modversions."; \
1319 echo )
1320
1321module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001322PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323$(module-dirs): crmodverdir $(objtree)/Module.symvers
1324 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1325
1326modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001327 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001328 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329
Paul Smith4f193362006-03-05 17:14:10 -05001330PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001331modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001332
Paul Smith4f193362006-03-05 17:14:10 -05001333install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1334PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001335_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001336 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001337 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338
Paul Smith4f193362006-03-05 17:14:10 -05001339PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001340_emodinst_post: _emodinst_
1341 $(call cmd,depmod)
1342
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1344
Paul Smith4f193362006-03-05 17:14:10 -05001345PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346$(clean-dirs):
1347 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1348
1349clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001350clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351
1352help:
1353 @echo ' Building external modules.'
1354 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1355 @echo ''
1356 @echo ' modules - default target, build the module(s)'
1357 @echo ' modules_install - install the module'
1358 @echo ' clean - remove generated files in module directory only'
1359 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001360
1361# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001362PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001363prepare: ;
1364scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365endif # KBUILD_EXTMOD
1366
Michal Marek88d7be02010-09-06 12:00:08 +02001367clean: $(clean-dirs)
1368 $(call cmd,rmdirs)
1369 $(call cmd,rmfiles)
1370 @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1371 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1372 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1373 -o -name '*.symtypes' -o -name 'modules.order' \
1374 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1375 -o -name '*.gcno' \) -type f -print | xargs rm -f
1376
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377# Generate tags for editors
1378# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001379quiet_cmd_tags = GEN $@
1380 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381
Sam Ravnborga680eed2008-12-03 22:24:13 +01001382tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 $(call cmd,tags)
1384
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385# Scripts to check various things for consistency
1386# ---------------------------------------------------------------------------
1387
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388includecheck:
1389 find * $(RCS_FIND_IGNORE) \
1390 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001391 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392
1393versioncheck:
1394 find * $(RCS_FIND_IGNORE) \
1395 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001396 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397
Nicolas Palix74425ee2010-06-06 17:15:01 +02001398coccicheck:
1399 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1400
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401namespacecheck:
1402 $(PERL) $(srctree)/scripts/namespace.pl
1403
Adrian Bunk295ac052007-08-24 23:04:56 +02001404export_report:
1405 $(PERL) $(srctree)/scripts/export_report.pl
1406
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407endif #ifeq ($(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 $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001423 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001425kernelrelease:
1426 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001427
Sam Ravnborgcb584552006-01-09 21:20:34 +01001428kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001429 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430
Sam Ravnborg06300b22006-01-25 07:13:18 +01001431# Single targets
1432# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001433# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001434# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001435# - build with separate output dir 'make O=...'
1436# - external modules
1437#
1438# target-dir => where to store outputfile
1439# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001440
Sam Ravnborg06300b22006-01-25 07:13:18 +01001441ifeq ($(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
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001466/: prepare scripts FORCE
1467 $(cmd_crmodverdir)
1468 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1469 $(build)=$(build-dir)
1470%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001471 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001472 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001473 $(build)=$(build-dir)
1474%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001475 $(cmd_crmodverdir)
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
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001489# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001490quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1491 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001492 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001493 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd882009-03-07 13:57:25 +01001494 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001495 $(KERNELRELEASE); \
1496 fi
1497
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001498# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001499# clean it up only when building all modules
1500cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1501 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502
Sam Ravnborg222d3942007-10-15 21:59:31 +02001503a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborg80c00ba2010-07-28 19:11:27 +02001504 $(KBUILD_AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001505 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001506 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507
1508quiet_cmd_as_o_S = AS $@
1509cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1510
1511# read all saved command lines
1512
1513targets := $(wildcard $(sort $(targets)))
1514cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1515
1516ifneq ($(cmd_files),)
1517 $(cmd_files): ; # Do not try to update included dependency files
1518 include $(cmd_files)
1519endif
1520
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1522# Usage:
1523# $(Q)$(MAKE) $(clean)=dir
1524clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1525
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526endif # skip-makefile
1527
Paul Smith4f193362006-03-05 17:14:10 -05001528PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001530
Paul Smith4f193362006-03-05 17:14:10 -05001531# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001532# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001533.PHONY: $(PHONY)