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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldsc8ddb272010-11-01 07:54:12 -04003SUBLEVEL = 37
Linus Torvalds3c0eee32011-01-04 16:50:19 -08004EXTRAVERSION =
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
Ben Gardiner41263fc2010-12-14 11:39:44 -0500227export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700228
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229# SHELL used by kbuild
230CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
231 else if [ -x /bin/bash ]; then echo /bin/bash; \
232 else echo sh; fi ; fi)
233
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200234HOSTCC = gcc
235HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800236HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200237HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200239# Decide whether to build built-in, modular, or both.
240# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
242KBUILD_MODULES :=
243KBUILD_BUILTIN := 1
244
245# If we have only "make modules", don't compile built-in objects.
246# When we're building modules with modversions, we need to consider
247# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200248# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
250ifeq ($(MAKECMDGOALS),modules)
251 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
252endif
253
254# If we have "make <whatever> modules", compile modules
255# in addition to whatever we do anyway.
256# Just "make" or "make all" shall build modules as well
257
258ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
259 KBUILD_MODULES := 1
260endif
261
262ifeq ($(MAKECMDGOALS),)
263 KBUILD_MODULES := 1
264endif
265
Sam Ravnborge579d352005-07-27 08:10:10 +0200266export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
268
269# Beautify output
270# ---------------------------------------------------------------------------
271#
272# Normally, we echo the whole command before executing it. By making
273# that echo $($(quiet)$(cmd)), we now have the possibility to set
274# $(quiet) to choose other forms of output instead, e.g.
275#
276# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
277# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
278#
279# If $(quiet) is empty, the whole command will be printed.
280# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200281# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282# the variable $(silent_cmd_cc_o_c) doesn't exist.
283#
Adrian Bunka58a4142006-01-10 00:08:17 +0100284# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285# for commands that shall be hidden in non-verbose mode.
286#
287# $(Q)ln $@ :<
288#
289# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
290# If KBUILD_VERBOSE equals 1 then the above command is displayed.
291
292ifeq ($(KBUILD_VERBOSE),1)
293 quiet =
294 Q =
295else
296 quiet=quiet_
297 Q = @
298endif
299
300# If the user is running make -s (silent mode), suppress echoing of
301# commands
302
303ifneq ($(findstring s,$(MAKEFLAGS)),)
304 quiet=silent_
305endif
306
307export quiet Q KBUILD_VERBOSE
308
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
310# Look for make include files relative to root of kernel src
311MAKEFLAGS += --include-dir=$(srctree)
312
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100313# We need some generic definitions (do not try to remake the file).
314$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800315include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
317# Make variables (CC, etc...)
318
319AS = $(CROSS_COMPILE)as
320LD = $(CROSS_COMPILE)ld
321CC = $(CROSS_COMPILE)gcc
322CPP = $(CC) -E
323AR = $(CROSS_COMPILE)ar
324NM = $(CROSS_COMPILE)nm
325STRIP = $(CROSS_COMPILE)strip
326OBJCOPY = $(CROSS_COMPILE)objcopy
327OBJDUMP = $(CROSS_COMPILE)objdump
328AWK = awk
329GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200330INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331DEPMOD = /sbin/depmod
332KALLSYMS = scripts/kallsyms
333PERL = perl
334CHECK = sparse
335
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100336CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
337 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200338CFLAGS_MODULE =
339AFLAGS_MODULE =
340LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341CFLAGS_KERNEL =
342AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700343CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345
346# Use LINUXINCLUDE when you must reference the include/ directory.
347# Needed to be compatible with the O= option
Sam Ravnborg24a675e2009-10-17 21:14:18 +0200348LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
Sam Ravnborg96f13042009-10-17 22:33:27 +0200349 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200350 -include include/generated/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100352KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200354KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700355 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300356 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800357 -Wno-format-security \
358 -fno-delete-null-pointer-checks
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200359KBUILD_AFLAGS_KERNEL :=
360KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200361KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200362KBUILD_AFLAGS_MODULE := -DMODULE
363KBUILD_CFLAGS_MODULE := -DMODULE
364KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700366# Read KERNELRELEASE from include/config/kernel.release (if it exists)
367KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100368KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100369
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200370export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100371export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200372export CPP AR NM STRIP OBJCOPY OBJDUMP
373export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200374export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Sam Ravnborg06c50402007-10-15 22:17:25 +0200376export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700377export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200378export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200379export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200380export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
382# When compiling out-of-tree modules, put MODVERDIR in the module
383# tree rather than in the kernel tree. The kernel tree might
384# even be read-only.
385export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387# Files to ignore in find ... statements
388
Trond Myklebust406119f2005-10-27 14:46:53 -0400389RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
390export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392# ===========================================================================
393# Rules shared between *config targets and build targets
394
395# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500396PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397scripts_basic:
398 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500399 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200401# To avoid any implicit rule to kick in, define an empty command.
402scripts/basic/%: scripts_basic ;
403
Paul Smith4f193362006-03-05 17:14:10 -0500404PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200405# outputmakefile generates a Makefile in the output directory, if using a
406# separate output directory. This allows convenient use of make in the
407# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200409ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100410 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200411 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
412 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
413endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
415# To make sure we do not include .config for any of the *config targets
416# catch them early, and hand them over to scripts/kconfig/Makefile
417# It is allowed to specify more targets when calling make, including
418# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200419# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420# Detect when mixed targets is specified, and make a second invocation
421# of make so .config is not included in this case either (for *config).
422
Roman Zippel3eb3c742007-01-10 14:45:28 +0100423no-dot-config-targets := clean mrproper distclean \
Nicolas Palix74425ee2010-06-06 17:15:01 +0200424 cscope TAGS tags help %docs check% coccicheck \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100425 include/linux/version.h headers_% \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700426 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
428config-targets := 0
429mixed-targets := 0
430dot-config := 1
431
432ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
433 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
434 dot-config := 0
435 endif
436endif
437
438ifeq ($(KBUILD_EXTMOD),)
439 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
440 config-targets := 1
441 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
442 mixed-targets := 1
443 endif
444 endif
445endif
446
447ifeq ($(mixed-targets),1)
448# ===========================================================================
449# We're called with mixed targets (*config and build targets).
450# Handle them one by one.
451
452%:: FORCE
453 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
454
455else
456ifeq ($(config-targets),1)
457# ===========================================================================
458# *config targets only - make sure prerequisites are updated, and descend
459# in scripts/kconfig to make the *config target
460
461# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
462# KBUILD_DEFCONFIG may point out an alternative default configuration
463# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200464include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400465export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100467config: scripts_basic outputmakefile FORCE
468 $(Q)mkdir -p include/linux include/config
469 $(Q)$(MAKE) $(build)=scripts/kconfig $@
470
471%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700472 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 $(Q)$(MAKE) $(build)=scripts/kconfig $@
474
475else
476# ===========================================================================
477# Build targets only - this includes vmlinux, arch specific targets, clean
478# targets and others. In general all targets except *config targets.
479
480ifeq ($(KBUILD_EXTMOD),)
481# Additional helpers built in scripts/
482# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200483# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500484PHONY += scripts
Michal Marekbc081dd2009-12-07 16:38:33 +0100485scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 $(Q)$(MAKE) $(build)=$(@)
487
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488# Objects we will link into vmlinux / subdirs we need to visit
489init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100490drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491net-y := net/
492libs-y := lib/
493core-y := usr/
494endif # KBUILD_EXTMOD
495
496ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200497# Read in config
498-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200500ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501# Read in dependencies to all Kconfig* files, make sure to run
502# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700503-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700506$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507
Roman Zippelc955cca2006-06-08 22:12:39 -0700508# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100509# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200510# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100511# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100512include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
514else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200515# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200516# but do not care if they are up-to-date. Use auto.conf to trigger the test
517PHONY += include/config/auto.conf
518
519include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200520 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200521 echo; \
522 echo " ERROR: Kernel configuration is invalid."; \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200523 echo " include/generated/autoconf.h or $@ are missing.";\
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200524 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
525 echo; \
526 /bin/false)
527
528endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700529
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530else
531# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700532include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200533endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
535# The all: target is the default when no target is given on the
536# command line.
537# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200538# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539all: vmlinux
540
541ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200542KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200544KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545endif
546
Ralf Baechlebef5b542008-07-16 13:02:24 +0100547include $(srctree)/arch/$(SRCARCH)/Makefile
548
Mike Frysinger08f67462009-06-04 16:29:08 -0700549ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100550KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
551endif
552
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100553# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900554ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100555KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900556endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100557
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200559KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100561# Some targets (ARM with Thumb2, for example), can't be built with frame
562# pointers. For those, we don't have FUNCTION_TRACER automatically
563# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
564# incompatible with -fomit-frame-pointer with current GCC, so we don't use
565# -fomit-frame-pointer with FUNCTION_TRACER.
566ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200567KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100569endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
571ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200572KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200573KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574endif
575
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200576ifdef CONFIG_DEBUG_INFO_REDUCED
577KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
578endif
579
Steven Rostedt606576c2008-10-06 19:06:12 -0400580ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200581KBUILD_CFLAGS += -pg
Steven Rostedt72441cb2010-10-13 17:12:30 -0400582ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400583 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400584 BUILD_C_RECORDMCOUNT := y
585 export BUILD_C_RECORDMCOUNT
586 endif
587endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200588endif
589
Sam Ravnborg91341d42008-01-21 21:31:44 +0100590# We trigger additional mismatches with less inlining
591ifdef CONFIG_DEBUG_SECTION_MISMATCH
592KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
593endif
594
Sam Ravnborge8e69932005-04-30 16:51:42 -0700595# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700596NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700597CHECKFLAGS += $(NOSTDINC_FLAGS)
598
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200600KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200602# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200603KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400605# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700606KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700607
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700608# conserve stack if available
609KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
610
Jason Baronbf5438fc2010-09-17 11:09:00 -0400611# check for 'asm goto'
612ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
613 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
614endif
615
Sam Ravnborg06c50402007-10-15 22:17:25 +0200616# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100617# But warn user when we do so
618warn-assign = \
619$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
620
621ifneq ($(KCPPFLAGS),)
622 $(call warn-assign,CPPFLAGS)
623 KBUILD_CPPFLAGS += $(KCPPFLAGS)
624endif
625ifneq ($(KAFLAGS),)
626 $(call warn-assign,AFLAGS)
627 KBUILD_AFLAGS += $(KAFLAGS)
628endif
629ifneq ($(KCFLAGS),)
630 $(call warn-assign,CFLAGS)
631 KBUILD_CFLAGS += $(KCFLAGS)
632endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200633
Roland McGrath18991192007-07-19 01:48:40 -0700634# Use --build-id when available.
635LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200636 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200637KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700638LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
639
David Howells5d7d18f2009-03-04 11:59:07 -0800640ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200641LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800642endif
643
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200645# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646# set in the environment
647# Also any assignments in arch/$(ARCH)/Makefile take precedence over
648# this default value
649export KBUILD_IMAGE ?= vmlinux
650
651#
652# INSTALL_PATH specifies where to place the updated kernel and system map
653# images. Default is /boot, but you can set it to other values
654export INSTALL_PATH ?= /boot
655
656#
657# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
658# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200659# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660#
661
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100662MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663export MODLIB
664
Theodore Ts'oac031f22006-06-21 20:53:09 -0400665#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100666# INSTALL_MOD_STRIP, if defined, will cause modules to be
667# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
668# the default option --strip-debug will be used. Otherwise,
669# INSTALL_MOD_STRIP will used as the options to the strip command.
670
Theodore Ts'oac031f22006-06-21 20:53:09 -0400671ifdef INSTALL_MOD_STRIP
672ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100673mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400674else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100675mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400676endif # INSTALL_MOD_STRIP=1
677else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100678mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400679endif # INSTALL_MOD_STRIP
680export mod_strip_cmd
681
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
683ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100684core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
686vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
687 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
688 $(net-y) $(net-m) $(libs-y) $(libs-m)))
689
690vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
691 $(init-n) $(init-) \
692 $(core-n) $(core-) $(drivers-n) $(drivers-) \
693 $(net-n) $(net-) $(libs-n) $(libs-))))
694
695init-y := $(patsubst %/, %/built-in.o, $(init-y))
696core-y := $(patsubst %/, %/built-in.o, $(core-y))
697drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
698net-y := $(patsubst %/, %/built-in.o, $(net-y))
699libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
700libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
701libs-y := $(libs-y1) $(libs-y2)
702
703# Build vmlinux
704# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200705# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200707# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708# Ordering when linking is important, and $(vmlinux-init) must be first.
709#
710# vmlinux
711# ^
712# |
713# +-< $(vmlinux-init)
714# | +--< init/version.o + more
715# |
716# +--< $(vmlinux-main)
717# | +--< driver/built-in.o mm/built-in.o + more
718# |
719# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
720#
721# vmlinux version (uname -v) cannot be updated during normal
722# descending-into-subdirs phase since we do not yet know if we need to
723# update vmlinux.
724# Therefore this step is delayed until just before final link of vmlinux -
725# except in the kallsyms case where it is done just before adding the
726# symbols to the kernel.
727#
728# System.map is generated to document addresses of all kernel symbols
729
730vmlinux-init := $(head-y) $(init-y)
731vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
732vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200733vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100734export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
736# Rule to link vmlinux - also used during CONFIG_KALLSYMS
737# May be overridden by arch/$(ARCH)/Makefile
738quiet_cmd_vmlinux__ ?= LD $@
739 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
740 -T $(vmlinux-lds) $(vmlinux-init) \
741 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200742 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743
744# Generate new vmlinux version
745quiet_cmd_vmlinux_version = GEN .version
746 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200747 if [ ! -r .version ]; then \
748 rm -f .version; \
749 echo 1 >.version; \
750 else \
751 mv .version .old_version; \
752 expr 0$$(cat .old_version) + 1 >.version; \
753 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 $(MAKE) $(build)=init
755
756# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200757quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
759
760# Link of vmlinux
761# If CONFIG_KALLSYMS is set .version is already updated
762# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700763# Use + in front of the vmlinux_version rule to silent warning with make -j2
764# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700766 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
768
769 $(call cmd,vmlinux__)
770 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
771
Sam Ravnborg46352812006-08-08 21:41:18 +0200772 $(Q)$(if $($(quiet)cmd_sysmap), \
773 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
774 $(cmd_sysmap) $@ System.map; \
775 if [ $$? -ne 0 ]; then \
776 rm -f $@; \
777 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 fi;
779 $(verify_kallsyms)
780endef
781
782
783ifdef CONFIG_KALLSYMS
784# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
785# It's a three stage process:
786# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
787# empty
788# Running kallsyms on that gives us .tmp_kallsyms1.o with
789# the right size - vmlinux version (uname -v) is updated during this step
790# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
791# but due to the added section, some addresses have shifted.
792# From here, we generate a correct .tmp_kallsyms2.o
793# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
794# o Verify that the System.map from vmlinux matches the map from
795# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
796# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
797# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
798# temporary bypass to allow the kernel to be built while the
799# maintainers work out what went wrong with kallsyms.
800
801ifdef CONFIG_KALLSYMS_EXTRA_PASS
802last_kallsyms := 3
803else
804last_kallsyms := 2
805endif
806
807kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
808
809define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200810 $(Q)$(if $($(quiet)cmd_sysmap), \
811 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200813 $(Q)cmp -s System.map .tmp_System.map || \
814 (echo Inconsistent kallsyms data; \
815 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 rm .tmp_kallsyms* ; /bin/false )
817endef
818
819# Update vmlinux version before link
820# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200821# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822cmd_ksym_ld = $(cmd_vmlinux__)
823define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200824 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 +$(call cmd,vmlinux_version)
826 $(call cmd,vmlinux__)
827 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
828endef
829
830# Generate .S file with all kernel symbols
831quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100832 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
833 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100835.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 $(call if_changed_dep,as_o_S)
837
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100838.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 $(call cmd,kallsyms)
840
841# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100842.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
843 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100845.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
846 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100848.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
849 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
851# Needs to visit scripts/ before $(KALLSYMS) can be used.
852$(KALLSYMS): scripts ;
853
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000854# Generate some data for debugging strange kallsyms problems
855debug_kallsyms: .tmp_map$(last_kallsyms)
856
857.tmp_map%: .tmp_vmlinux% FORCE
858 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
859
860.tmp_map3: .tmp_map2
861
862.tmp_map2: .tmp_map1
863
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864endif # ifdef CONFIG_KALLSYMS
865
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200866# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
867# relevant sections renamed as per the linker script.
868quiet_cmd_vmlinux-modpost = LD $@
869 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
870 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200871 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200872define rule_vmlinux-modpost
873 :
874 +$(call cmd,vmlinux-modpost)
875 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
876 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
877endef
878
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100880vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700881ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100882 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700883endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700884ifdef CONFIG_SAMPLES
885 $(Q)$(MAKE) $(build)=samples
886endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700887ifdef CONFIG_BUILD_DOCSRC
888 $(Q)$(MAKE) $(build)=Documentation
889endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200890 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200892 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893
Sam Ravnborg310f8242008-01-21 22:57:09 +0100894# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100895ifdef CONFIG_KALLSYMS
896.tmp_vmlinux1: vmlinux.o
897endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200898
899modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
900vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200901 $(call if_changed_rule,vmlinux-modpost)
902
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903# The actual objects are generated when descending,
904# make sure no implicit rule kicks in
905$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
906
907# Handle descending into subdirectories listed in $(vmlinux-dirs)
908# Preset locale variables to speed up the build process. Limit locale
909# tweaks to this spot to avoid wrong language settings when running
910# make menuconfig etc.
911# Error messages still appears in the original language
912
Paul Smith4f193362006-03-05 17:14:10 -0500913PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200914$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 $(Q)$(MAKE) $(build)=$@
916
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700917# Store (new) KERNELRELASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700918include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100919 $(Q)rm -f $@
Michal Marek7263e712010-07-05 23:43:04 +0200920 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100921
922
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200924# or the modules are listed in "prepare".
925# A multi level approach is used. prepareN is processed before prepareN-1.
926# archprepare is used in arch Makefiles and when processed asm symlink,
927# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200929# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500930PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200931
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200932# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933# and if so do:
934# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700935prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500937 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700938 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 echo " $(srctree) is not clean, please run 'make mrproper'";\
940 echo " in the '$(srctree)' directory.";\
941 /bin/false; \
942 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943endif
944
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200945# prepare2 creates a makefile if using a separate output directory
946prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947
Sam Ravnborg273b2812009-10-18 00:52:28 +0200948prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200949 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200950 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200952archprepare: prepare1 scripts_basic
953
954prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200955 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200956 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200957
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800959prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961# Generate some files
962# ---------------------------------------------------------------------------
963
964# KERNELRELEASE can change from a few different places, meaning version.h
965# needs to be updated, so this check is forced on all builds
966
967uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200968define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200970 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
971 exit 1; \
972 fi; \
973 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974endef
975
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200976define filechk_version.h
977 (echo \#define LINUX_VERSION_CODE $(shell \
978 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
979 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
980endef
981
982include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 $(call filechk,version.h)
984
Sam Ravnborg273b2812009-10-18 00:52:28 +0200985include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200986 $(call filechk,utsrelease.h)
987
Vegard Nossum179efcb2008-12-16 12:33:43 +0100988PHONY += headerdep
989headerdep:
990 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992# ---------------------------------------------------------------------------
993
Paul Smith4f193362006-03-05 17:14:10 -0500994PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995depend dep:
996 @echo '*** Warning: make $@ is unnecessary now.'
997
998# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +0300999# Firmware install
1000INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1001export INSTALL_FW_PATH
1002
1003PHONY += firmware_install
1004firmware_install: FORCE
1005 @mkdir -p $(objtree)/firmware
1006 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1007
1008# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001009# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001010
Sam Ravnborge6883b12008-06-05 16:43:46 +02001011#Default location for installed headers
1012export INSTALL_HDR_PATH = $(objtree)/usr
1013
Sam Ravnborge6883b12008-06-05 16:43:46 +02001014hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001015
1016# If we do an all arch process set dst to asm-$(hdr-arch)
1017hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001018
1019PHONY += __headers
1020__headers: include/linux/version.h scripts_basic FORCE
1021 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001022
1023PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001024headers_install_all:
1025 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001026
David Woodhouse8d730cf2006-06-18 11:58:39 +01001027PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001028headers_install: __headers
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001029 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001030 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001031 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001032 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001033
Mike Frysinger1f857122007-02-14 00:33:02 -08001034PHONY += headers_check_all
1035headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001036 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001037
David Woodhouse68475352006-06-18 12:02:10 +01001038PHONY += headers_check
1039headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001040 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001041 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001042
David Woodhouse8d730cf2006-06-18 11:58:39 +01001043# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044# Modules
1045
1046ifdef CONFIG_MODULES
1047
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001048# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049
Michal Marek73d13932010-03-10 12:28:58 +01001050all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051
1052# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001053#
1054# A module can be listed more than once in obj-m resulting in
1055# duplicate lines in modules.order files. Those are removed
1056# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057
Paul Smith4f193362006-03-05 17:14:10 -05001058PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001059modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001060 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001061 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001062 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001063 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064
Michal Mareka6c36632010-03-08 10:07:12 +01001065modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1066 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1067
Michal Marek73d13932010-03-10 12:28:58 +01001068%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001069 $(Q)$(MAKE) $(modbuiltin)=$*
1070
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071
1072# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001073PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001074modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075
1076# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001077PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078modules_install: _modinst_ _modinst_post
1079
Paul Smith4f193362006-03-05 17:14:10 -05001080PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001081_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001082 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 echo "Warning: you may need to install module-init-tools"; \
1084 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1085 sleep 1; \
1086 fi
1087 @rm -rf $(MODLIB)/kernel
1088 @rm -f $(MODLIB)/source
1089 @mkdir -p $(MODLIB)/kernel
1090 @ln -s $(srctree) $(MODLIB)/source
1091 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1092 rm -f $(MODLIB)/build ; \
1093 ln -s $(objtree) $(MODLIB)/build ; \
1094 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001095 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001096 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001097 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001099# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100# boot a modules.dep even before / is mounted read-write. However the
1101# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001102PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001104 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001105 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106
1107else # CONFIG_MODULES
1108
1109# Modules not configured
1110# ---------------------------------------------------------------------------
1111
1112modules modules_install: FORCE
1113 @echo
1114 @echo "The present kernel configuration has modules disabled."
1115 @echo "Type 'make config' and enable loadable module support."
1116 @echo "Then build a kernel with module support enabled."
1117 @echo
1118 @exit 1
1119
1120endif # CONFIG_MODULES
1121
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122###
1123# Cleaning is done on three levels.
1124# make clean Delete most generated files
1125# Leave enough to build external modules
1126# make mrproper Delete the current configuration, and all generated files
1127# make distclean Remove editor backup files, patch leftover files and the like
1128
1129# Directories & files removed with 'make clean'
1130CLEAN_DIRS += $(MODVERDIR)
1131CLEAN_FILES += vmlinux System.map \
1132 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1133
1134# Directories & files removed with 'make mrproper'
Sam Ravnborg96f13042009-10-17 22:33:27 +02001135MRPROPER_DIRS += include/config usr/include include/generated
Sam Ravnborgf7f16b72009-10-18 00:00:43 +02001136MRPROPER_FILES += .config .config.old .version .old_version \
Sam Ravnborg264a2682009-10-18 00:49:24 +02001137 include/linux/version.h \
Wenji Huang8723eae2009-11-19 08:44:32 +08001138 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
1140# clean - Delete most, but leave enough to build external modules
1141#
1142clean: rm-dirs := $(CLEAN_DIRS)
1143clean: rm-files := $(CLEAN_FILES)
Michal Marekc47f2142010-09-03 15:00:22 +02001144clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145
Paul Smith4f193362006-03-05 17:14:10 -05001146PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147$(clean-dirs):
1148 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1149
Michal Marek88d7be02010-09-06 12:00:08 +02001150clean: archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
1152# mrproper - Delete all generated files, including .config
1153#
1154mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1155mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1156mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1157
Paul Smith4f193362006-03-05 17:14:10 -05001158PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159$(mrproper-dirs):
1160 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1161
1162mrproper: clean archmrproper $(mrproper-dirs)
1163 $(call cmd,rmdirs)
1164 $(call cmd,rmfiles)
1165
1166# distclean
1167#
Paul Smith4f193362006-03-05 17:14:10 -05001168PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169
1170distclean: mrproper
1171 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001172 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001174 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1176 -type f -print | xargs rm -f
1177
1178
1179# Packaging of the kernel to various formats
1180# ---------------------------------------------------------------------------
1181# rpm target kept for backward compatibility
1182package-dir := $(srctree)/scripts/package
1183
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001184%src-pkg: FORCE
1185 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001186%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001187 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001188rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001189 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190
1191
1192# Brief documentation of the typical targets used
1193# ---------------------------------------------------------------------------
1194
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001195boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001197board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1198board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199
1200help:
1201 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001202 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001203 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001204 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001205 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206 @echo ''
1207 @echo 'Configuration targets:'
1208 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1209 @echo ''
1210 @echo 'Other generic targets:'
1211 @echo ' all - Build all targets marked with [*]'
1212 @echo '* vmlinux - Build the bare kernel'
1213 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001214 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001215 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1216 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001218 @echo ' dir/file.[oisS] - Build specified target only'
1219 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1220 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001221 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001222 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 @echo ' tags/TAGS - Generate tags file for editors'
1224 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001225 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001226 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001227 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001228 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001229 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 @echo ' checkstack - Generate a list of stack hogs'
1232 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001233 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001234 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001235 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001236 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001237 @echo ' headerdep - Detect inclusion cycles in headers'
1238 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1239 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001241 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 @echo ''
1243 @echo 'Documentation targets:'
1244 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1245 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001246 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001248 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 @echo ''
1250 @$(if $(boards), \
1251 $(foreach b, $(boards), \
1252 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1253 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001254 @$(if $(board-dirs), \
1255 $(foreach b, $(board-dirs), \
1256 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1257 printf " %-16s - Show all of the above\\n" help-boards; \
1258 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259
1260 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001261 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001263 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1264 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 @echo ''
1266 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1267 @echo 'For further info see the ./README file'
1268
1269
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001270help-board-dirs := $(addprefix help-,$(board-dirs))
1271
1272help-boards: $(help-board-dirs)
1273
1274boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1275
1276$(help-board-dirs): help-%:
1277 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1278 @$(if $(boards-per-dir), \
1279 $(foreach b, $(boards-per-dir), \
1280 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1281 echo '')
1282
1283
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284# Documentation targets
1285# ---------------------------------------------------------------------------
1286%docs: scripts_basic FORCE
1287 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1288
1289else # KBUILD_EXTMOD
1290
1291###
1292# External module support.
1293# When building external modules the kernel used as basis is considered
1294# read-only, and no consistency checks are made and the make
1295# system is not used on the basis kernel. If updates are required
1296# in the basis kernel ordinary make commands (without M=...) must
1297# be used.
1298#
1299# The following are the only valid targets when building external
1300# modules.
1301# make M=dir clean Delete all automatically generated files
1302# make M=dir modules Make all modules in specified dir
1303# make M=dir Same as 'make M=dir modules'
1304# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001305# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306# Assumes install directory is already created
1307
1308# We are always building modules
1309KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001310PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001312 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
Paul Smith4f193362006-03-05 17:14:10 -05001314PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315$(objtree)/Module.symvers:
1316 @test -e $(objtree)/Module.symvers || ( \
1317 echo; \
1318 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1319 echo " is missing; modules will have no dependencies and modversions."; \
1320 echo )
1321
1322module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001323PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324$(module-dirs): crmodverdir $(objtree)/Module.symvers
1325 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1326
1327modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001328 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001329 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330
Paul Smith4f193362006-03-05 17:14:10 -05001331PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001332modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001333
Paul Smith4f193362006-03-05 17:14:10 -05001334install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1335PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001336_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001337 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001338 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339
Paul Smith4f193362006-03-05 17:14:10 -05001340PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001341_emodinst_post: _emodinst_
1342 $(call cmd,depmod)
1343
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1345
Paul Smith4f193362006-03-05 17:14:10 -05001346PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347$(clean-dirs):
1348 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1349
1350clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001351clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352
1353help:
1354 @echo ' Building external modules.'
1355 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1356 @echo ''
1357 @echo ' modules - default target, build the module(s)'
1358 @echo ' modules_install - install the module'
1359 @echo ' clean - remove generated files in module directory only'
1360 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001361
1362# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001363PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001364prepare: ;
1365scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366endif # KBUILD_EXTMOD
1367
Michal Marek88d7be02010-09-06 12:00:08 +02001368clean: $(clean-dirs)
1369 $(call cmd,rmdirs)
1370 $(call cmd,rmfiles)
1371 @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1372 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1373 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1374 -o -name '*.symtypes' -o -name 'modules.order' \
1375 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1376 -o -name '*.gcno' \) -type f -print | xargs rm -f
1377
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378# Generate tags for editors
1379# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001380quiet_cmd_tags = GEN $@
1381 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382
Sam Ravnborga680eed2008-12-03 22:24:13 +01001383tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 $(call cmd,tags)
1385
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386# Scripts to check various things for consistency
1387# ---------------------------------------------------------------------------
1388
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389includecheck:
1390 find * $(RCS_FIND_IGNORE) \
1391 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001392 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393
1394versioncheck:
1395 find * $(RCS_FIND_IGNORE) \
1396 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001397 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398
Nicolas Palix74425ee2010-06-06 17:15:01 +02001399coccicheck:
1400 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1401
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402namespacecheck:
1403 $(PERL) $(srctree)/scripts/namespace.pl
1404
Adrian Bunk295ac052007-08-24 23:04:56 +02001405export_report:
1406 $(PERL) $(srctree)/scripts/export_report.pl
1407
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408endif #ifeq ($(config-targets),1)
1409endif #ifeq ($(mixed-targets),1)
1410
Roman Zippelc30a02e2006-06-08 22:12:50 -07001411PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001412
Jeff Dike011e3a92006-12-13 00:34:12 -08001413# UML needs a little special treatment here. It wants to use the host
1414# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1415# else wants $(ARCH), including people doing cross-builds, which means
1416# that $(SUBARCH) doesn't work here.
1417ifeq ($(ARCH), um)
1418CHECKSTACK_ARCH := $(SUBARCH)
1419else
1420CHECKSTACK_ARCH := $(ARCH)
1421endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422checkstack:
1423 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001424 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001426kernelrelease:
1427 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001428
Sam Ravnborgcb584552006-01-09 21:20:34 +01001429kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001430 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431
Sam Ravnborg06300b22006-01-25 07:13:18 +01001432# Single targets
1433# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001434# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001435# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001436# - build with separate output dir 'make O=...'
1437# - external modules
1438#
1439# target-dir => where to store outputfile
1440# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001441
Sam Ravnborg06300b22006-01-25 07:13:18 +01001442ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001443 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001444 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001445else
1446 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001447 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1448 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001449endif
1450
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001451%.s: %.c prepare scripts FORCE
1452 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1453%.i: %.c prepare scripts FORCE
1454 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1455%.o: %.c prepare scripts FORCE
1456 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1457%.lst: %.c prepare scripts FORCE
1458 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1459%.s: %.S prepare scripts FORCE
1460 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1461%.o: %.S prepare scripts FORCE
1462 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001463%.symtypes: %.c prepare scripts FORCE
1464 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001465
1466# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001467/: prepare scripts FORCE
1468 $(cmd_crmodverdir)
1469 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1470 $(build)=$(build-dir)
1471%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001472 $(cmd_crmodverdir)
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 Ravnborg7bb9d092007-10-19 22:20:02 +02001476 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001477 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001478 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001479 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001480
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481# FIXME Should go into a make.lib or something
1482# ===========================================================================
1483
1484quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1485 cmd_rmdirs = rm -rf $(rm-dirs)
1486
1487quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1488 cmd_rmfiles = rm -f $(rm-files)
1489
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001490# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001491quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1492 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001493 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001494 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001495 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001496 $(KERNELRELEASE); \
1497 fi
1498
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001499# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001500# clean it up only when building all modules
1501cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1502 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503
Sam Ravnborg222d3942007-10-15 21:59:31 +02001504a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborg80c00ba2010-07-28 19:11:27 +02001505 $(KBUILD_AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001506 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001507 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508
1509quiet_cmd_as_o_S = AS $@
1510cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1511
1512# read all saved command lines
1513
1514targets := $(wildcard $(sort $(targets)))
1515cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1516
1517ifneq ($(cmd_files),)
1518 $(cmd_files): ; # Do not try to update included dependency files
1519 include $(cmd_files)
1520endif
1521
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1523# Usage:
1524# $(Q)$(MAKE) $(clean)=dir
1525clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1526
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527endif # skip-makefile
1528
Paul Smith4f193362006-03-05 17:14:10 -05001529PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001531
Paul Smith4f193362006-03-05 17:14:10 -05001532# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001533# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001534.PHONY: $(PHONY)