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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds28d03252009-06-24 16:25:37 -07003SUBLEVEL = 31
Linus Torvalds8e4a7182009-07-04 10:58:48 -07004EXTRAVERSION = -rc2
Linus Torvalds59a37592009-05-23 14:47:00 -07005NAME = Man-Eating Seals of Antiquity
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
19# We are using a recursive build, so we need to do a little thinking
20# to get the ordering right.
21#
22# Most importantly: sub-Makefiles should only ever modify files in
23# their own directory. If in some directory we have a dependency on
24# a file in another dir (which doesn't happen often, but it's often
25# unavoidable when linking the built-in.o targets which finally
26# turn into vmlinux), we will call a sub make in that other dir, and
27# after that we are sure that everything which is in that other dir
28# is now up to date.
29#
30# The only cases where we need to modify files which have global
31# effects are thus separated out and done before the recursive
32# descending is started. They are now explicitly listed as the
33# prepare rule.
34
35# To put more focus on warnings, be less verbose as default
36# Use 'make V=1' to see the full commands
37
Cheng Renquanb8b06182009-05-26 16:03:07 +080038ifeq ("$(origin V)", "command line")
39 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040endif
41ifndef KBUILD_VERBOSE
42 KBUILD_VERBOSE = 0
43endif
44
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040045# Call a source code checker (by default, "sparse") as part of the
46# C compilation.
47#
48# Use 'make C=1' to enable checking of only re-compiled files.
49# Use 'make C=2' to enable checking of *all* source files, regardless
50# of whether they are re-compiled or not.
51#
52# See the file "Documentation/sparse.txt" for more details, including
53# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Cheng Renquanb8b06182009-05-26 16:03:07 +080055ifeq ("$(origin C)", "command line")
56 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057endif
58ifndef KBUILD_CHECKSRC
59 KBUILD_CHECKSRC = 0
60endif
61
62# Use make M=dir to specify directory of external module to build
63# Old syntax make ... SUBDIRS=$PWD is still supported
64# Setting the environment variable KBUILD_EXTMOD take precedence
65ifdef SUBDIRS
66 KBUILD_EXTMOD ?= $(SUBDIRS)
67endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Cheng Renquanb8b06182009-05-26 16:03:07 +080069ifeq ("$(origin M)", "command line")
70 KBUILD_EXTMOD := $(M)
71endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73# kbuild supports saving output files in a separate directory.
74# To locate output files in a separate directory two syntaxes are supported.
75# In both cases the working directory must be the root of the kernel src.
76# 1) O=
77# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020078#
Linus Torvalds1da177e2005-04-16 15:20:36 -070079# 2) Set KBUILD_OUTPUT
80# Set the environment variable KBUILD_OUTPUT to point to the directory
81# where the output files shall be placed.
82# export KBUILD_OUTPUT=dir/to/store/output/files/
83# make
84#
85# The O= assignment takes precedence over the KBUILD_OUTPUT environment
86# variable.
87
88
89# KBUILD_SRC is set on invocation of make in OBJ directory
90# KBUILD_SRC is not intended to be used by the regular user (for now)
91ifeq ($(KBUILD_SRC),)
92
93# OK, Make called in directory where kernel src resides
94# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +080095ifeq ("$(origin O)", "command line")
96 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -070097endif
98
99# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500100PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101_all:
102
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100103# Cancel implicit rules on top Makefile
104$(CURDIR)/Makefile Makefile: ;
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106ifneq ($(KBUILD_OUTPUT),)
107# Invoke a second make in the output directory, passing relevant variables
108# check that the output directory actually exists
109saved-output := $(KBUILD_OUTPUT)
110KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
111$(if $(KBUILD_OUTPUT),, \
112 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Milton Miller0b357862007-09-21 18:09:02 -0500114PHONY += $(MAKECMDGOALS) sub-make
115
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100116$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500117 $(Q)@:
118
119sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200120 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
121 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500122 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
123 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
125# Leave processing to above invocation of make
126skip-makefile := 1
127endif # ifneq ($(KBUILD_OUTPUT),)
128endif # ifeq ($(KBUILD_SRC),)
129
130# We process the rest of the Makefile if this is the final invocation of make
131ifeq ($(skip-makefile),)
132
133# If building an external module we do not care about the all: rule
134# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500135PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136ifeq ($(KBUILD_EXTMOD),)
137_all: all
138else
139_all: modules
140endif
141
142srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143objtree := $(CURDIR)
144src := $(srctree)
145obj := $(objtree)
146
Mattia Dongili0f558c32006-02-19 13:50:37 +0100147VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Amerigo Wang11294232009-06-19 03:40:26 -0400149export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152# SUBARCH tells the usermode build what the underlying arch is. That is set
153# first, and if a usermode build is happening, the "ARCH=um" on the command
154# line overrides the setting of ARCH below. If a native build is happening,
155# then ARCH is assigned, getting whatever value it gets normally, and
156# SUBARCH is subsequently ignored.
157
158SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
159 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800160 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900161 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt3cc000b2009-04-11 08:39:27 +0900162 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164# Cross compiling and selecting different set of gcc/bin-utils
165# ---------------------------------------------------------------------------
166#
167# When performing cross compilation for other architectures ARCH shall be set
168# to the target architecture. (See arch/* for the possibilities).
169# ARCH can be set during invocation of make:
170# make ARCH=ia64
171# Another way is to have ARCH set in the environment.
172# The default ARCH is the host where make is executed.
173
174# CROSS_COMPILE specify the prefix used for all executables used
175# during compilation. Only gcc and related bin-utils executables
176# are prefixed with $(CROSS_COMPILE).
177# CROSS_COMPILE can be set on the command line
178# make CROSS_COMPILE=ia64-linux-
179# Alternatively CROSS_COMPILE can be set in the environment.
180# Default value for CROSS_COMPILE is not to prefix executables
181# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100182export KBUILD_BUILDHOST := $(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183ARCH ?= $(SUBARCH)
184CROSS_COMPILE ?=
185
186# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200187UTS_MACHINE := $(ARCH)
188SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
Sam Ravnborgd746d642007-11-12 20:14:19 +0100190# Additional ARCH settings for x86
191ifeq ($(ARCH),i386)
192 SRCARCH := x86
193endif
194ifeq ($(ARCH),x86_64)
195 SRCARCH := x86
196endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200197
Sam Ravnborg5e538792008-12-02 23:17:12 -0800198# Additional ARCH settings for sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200199ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800200 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200201endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200202
Paul Mundt3cc000b2009-04-11 08:39:27 +0900203# Additional ARCH settings for sh
204ifeq ($(ARCH),sh64)
205 SRCARCH := sh
206endif
207
Sam Ravnborg5e538792008-12-02 23:17:12 -0800208# Where to locate arch specific headers
209hdr-arch := $(SRCARCH)
210
Sam Ravnborg49148022009-01-16 21:58:10 +1000211ifeq ($(ARCH),m68knommu)
212 hdr-arch := m68k
213endif
214
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700215KCONFIG_CONFIG ?= .config
216
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217# SHELL used by kbuild
218CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
219 else if [ -x /bin/bash ]; then echo /bin/bash; \
220 else echo sh; fi ; fi)
221
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200222HOSTCC = gcc
223HOSTCXX = g++
224HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
225HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200227# Decide whether to build built-in, modular, or both.
228# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
230KBUILD_MODULES :=
231KBUILD_BUILTIN := 1
232
233# If we have only "make modules", don't compile built-in objects.
234# When we're building modules with modversions, we need to consider
235# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200236# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
238ifeq ($(MAKECMDGOALS),modules)
239 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
240endif
241
242# If we have "make <whatever> modules", compile modules
243# in addition to whatever we do anyway.
244# Just "make" or "make all" shall build modules as well
245
246ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
247 KBUILD_MODULES := 1
248endif
249
250ifeq ($(MAKECMDGOALS),)
251 KBUILD_MODULES := 1
252endif
253
Sam Ravnborge579d352005-07-27 08:10:10 +0200254export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
256
257# Beautify output
258# ---------------------------------------------------------------------------
259#
260# Normally, we echo the whole command before executing it. By making
261# that echo $($(quiet)$(cmd)), we now have the possibility to set
262# $(quiet) to choose other forms of output instead, e.g.
263#
264# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
265# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
266#
267# If $(quiet) is empty, the whole command will be printed.
268# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200269# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270# the variable $(silent_cmd_cc_o_c) doesn't exist.
271#
Adrian Bunka58a4142006-01-10 00:08:17 +0100272# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273# for commands that shall be hidden in non-verbose mode.
274#
275# $(Q)ln $@ :<
276#
277# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
278# If KBUILD_VERBOSE equals 1 then the above command is displayed.
279
280ifeq ($(KBUILD_VERBOSE),1)
281 quiet =
282 Q =
283else
284 quiet=quiet_
285 Q = @
286endif
287
288# If the user is running make -s (silent mode), suppress echoing of
289# commands
290
291ifneq ($(findstring s,$(MAKEFLAGS)),)
292 quiet=silent_
293endif
294
295export quiet Q KBUILD_VERBOSE
296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
298# Look for make include files relative to root of kernel src
299MAKEFLAGS += --include-dir=$(srctree)
300
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100301# We need some generic definitions (do not try to remake the file).
302$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800303include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305# Make variables (CC, etc...)
306
307AS = $(CROSS_COMPILE)as
308LD = $(CROSS_COMPILE)ld
309CC = $(CROSS_COMPILE)gcc
310CPP = $(CC) -E
311AR = $(CROSS_COMPILE)ar
312NM = $(CROSS_COMPILE)nm
313STRIP = $(CROSS_COMPILE)strip
314OBJCOPY = $(CROSS_COMPILE)objcopy
315OBJDUMP = $(CROSS_COMPILE)objdump
316AWK = awk
317GENKSYMS = scripts/genksyms/genksyms
318DEPMOD = /sbin/depmod
319KALLSYMS = scripts/kallsyms
320PERL = perl
321CHECK = sparse
322
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100323CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
324 -Wbitwise -Wno-return-void $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325MODFLAGS = -DMODULE
326CFLAGS_MODULE = $(MODFLAGS)
327AFLAGS_MODULE = $(MODFLAGS)
Roland McGrath114f5152007-07-23 01:12:08 -0700328LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329CFLAGS_KERNEL =
330AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700331CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
333
334# Use LINUXINCLUDE when you must reference the include/ directory.
335# Needed to be compatible with the O= option
336LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100337 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Sam Ravnborg5e4786f2008-06-22 21:48:26 +0200338 -I$(srctree)/arch/$(hdr-arch)/include \
339 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100341KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200343KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700344 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300345 -Werror-implicit-function-declaration \
346 -Wno-format-security
Sam Ravnborg222d3942007-10-15 21:59:31 +0200347KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700349# Read KERNELRELEASE from include/config/kernel.release (if it exists)
350KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100351KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100352
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200353export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100354export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200355export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
356export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
Sam Ravnborg06c50402007-10-15 22:17:25 +0200358export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700359export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200360export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362# When compiling out-of-tree modules, put MODVERDIR in the module
363# tree rather than in the kernel tree. The kernel tree might
364# even be read-only.
365export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367# Files to ignore in find ... statements
368
Trond Myklebust406119f2005-10-27 14:46:53 -0400369RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
370export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
372# ===========================================================================
373# Rules shared between *config targets and build targets
374
375# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500376PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377scripts_basic:
378 $(Q)$(MAKE) $(build)=scripts/basic
379
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200380# To avoid any implicit rule to kick in, define an empty command.
381scripts/basic/%: scripts_basic ;
382
Paul Smith4f193362006-03-05 17:14:10 -0500383PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200384# outputmakefile generates a Makefile in the output directory, if using a
385# separate output directory. This allows convenient use of make in the
386# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200388ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100389 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200390 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
391 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
392endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
394# To make sure we do not include .config for any of the *config targets
395# catch them early, and hand them over to scripts/kconfig/Makefile
396# It is allowed to specify more targets when calling make, including
397# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200398# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399# Detect when mixed targets is specified, and make a second invocation
400# of make so .config is not included in this case either (for *config).
401
Roman Zippel3eb3c742007-01-10 14:45:28 +0100402no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700403 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100404 include/linux/version.h headers_% \
405 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
407config-targets := 0
408mixed-targets := 0
409dot-config := 1
410
411ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
412 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
413 dot-config := 0
414 endif
415endif
416
417ifeq ($(KBUILD_EXTMOD),)
418 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
419 config-targets := 1
420 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
421 mixed-targets := 1
422 endif
423 endif
424endif
425
426ifeq ($(mixed-targets),1)
427# ===========================================================================
428# We're called with mixed targets (*config and build targets).
429# Handle them one by one.
430
431%:: FORCE
432 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
433
434else
435ifeq ($(config-targets),1)
436# ===========================================================================
437# *config targets only - make sure prerequisites are updated, and descend
438# in scripts/kconfig to make the *config target
439
440# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
441# KBUILD_DEFCONFIG may point out an alternative default configuration
442# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200443include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400444export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100446config: scripts_basic outputmakefile FORCE
447 $(Q)mkdir -p include/linux include/config
448 $(Q)$(MAKE) $(build)=scripts/kconfig $@
449
450%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700451 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 $(Q)$(MAKE) $(build)=scripts/kconfig $@
453
454else
455# ===========================================================================
456# Build targets only - this includes vmlinux, arch specific targets, clean
457# targets and others. In general all targets except *config targets.
458
459ifeq ($(KBUILD_EXTMOD),)
460# Additional helpers built in scripts/
461# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200462# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500463PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700464scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 $(Q)$(MAKE) $(build)=$(@)
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467# Objects we will link into vmlinux / subdirs we need to visit
468init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100469drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470net-y := net/
471libs-y := lib/
472core-y := usr/
473endif # KBUILD_EXTMOD
474
475ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200476# Read in config
477-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200479ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480# Read in dependencies to all Kconfig* files, make sure to run
481# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700482-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700485$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
Roman Zippelc955cca2006-06-08 22:12:39 -0700487# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100488# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200489# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100490# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700491include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
493else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200494# external modules needs include/linux/autoconf.h and include/config/auto.conf
495# but do not care if they are up-to-date. Use auto.conf to trigger the test
496PHONY += include/config/auto.conf
497
498include/config/auto.conf:
499 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
500 echo; \
501 echo " ERROR: Kernel configuration is invalid."; \
502 echo " include/linux/autoconf.h or $@ are missing."; \
503 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
504 echo; \
505 /bin/false)
506
507endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700508
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509else
510# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700511include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200512endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
514# The all: target is the default when no target is given on the
515# command line.
516# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200517# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518all: vmlinux
519
520ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200521KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200523KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524endif
525
Ralf Baechlebef5b542008-07-16 13:02:24 +0100526include $(srctree)/arch/$(SRCARCH)/Makefile
527
Mike Frysinger08f67462009-06-04 16:29:08 -0700528ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100529KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
530endif
531
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100532# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900533ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100534KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900535endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100536
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200538KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200540KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541endif
542
543ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200544KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200545KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546endif
547
Steven Rostedt606576c2008-10-06 19:06:12 -0400548ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200549KBUILD_CFLAGS += -pg
550endif
551
Sam Ravnborg91341d42008-01-21 21:31:44 +0100552# We trigger additional mismatches with less inlining
553ifdef CONFIG_DEBUG_SECTION_MISMATCH
554KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
555endif
556
Sam Ravnborge8e69932005-04-30 16:51:42 -0700557# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700558NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700559CHECKFLAGS += $(NOSTDINC_FLAGS)
560
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200562KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200564# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200565KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400567# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsd0115552009-03-19 15:53:19 -0700568KBUILD_CFLAGS += $(call cc-option,-fwrapv)
569
Kyle McMartin00308642009-03-23 15:25:49 -0400570# revert to pre-gcc-4.4 behaviour of .eh_frame
571KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
572
Sam Ravnborg06c50402007-10-15 22:17:25 +0200573# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100574# But warn user when we do so
575warn-assign = \
576$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
577
578ifneq ($(KCPPFLAGS),)
579 $(call warn-assign,CPPFLAGS)
580 KBUILD_CPPFLAGS += $(KCPPFLAGS)
581endif
582ifneq ($(KAFLAGS),)
583 $(call warn-assign,AFLAGS)
584 KBUILD_AFLAGS += $(KAFLAGS)
585endif
586ifneq ($(KCFLAGS),)
587 $(call warn-assign,CFLAGS)
588 KBUILD_CFLAGS += $(KCFLAGS)
589endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200590
Roland McGrath18991192007-07-19 01:48:40 -0700591# Use --build-id when available.
592LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
593 $(call ld-option, -Wl$(comma)--build-id,))
594LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
595LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
596
David Howells5d7d18f2009-03-04 11:59:07 -0800597ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
598LDFLAGS_vmlinux += -X
599endif
600
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200602# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603# set in the environment
604# Also any assignments in arch/$(ARCH)/Makefile take precedence over
605# this default value
606export KBUILD_IMAGE ?= vmlinux
607
608#
609# INSTALL_PATH specifies where to place the updated kernel and system map
610# images. Default is /boot, but you can set it to other values
611export INSTALL_PATH ?= /boot
612
613#
614# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
615# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200616# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617#
618
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100619MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620export MODLIB
621
Theodore Ts'oac031f22006-06-21 20:53:09 -0400622#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100623# INSTALL_MOD_STRIP, if defined, will cause modules to be
624# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
625# the default option --strip-debug will be used. Otherwise,
626# INSTALL_MOD_STRIP will used as the options to the strip command.
627
Theodore Ts'oac031f22006-06-21 20:53:09 -0400628ifdef INSTALL_MOD_STRIP
629ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100630mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400631else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100632mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400633endif # INSTALL_MOD_STRIP=1
634else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100635mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400636endif # INSTALL_MOD_STRIP
637export mod_strip_cmd
638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
640ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100641core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642
643vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
644 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
645 $(net-y) $(net-m) $(libs-y) $(libs-m)))
646
647vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
648 $(init-n) $(init-) \
649 $(core-n) $(core-) $(drivers-n) $(drivers-) \
650 $(net-n) $(net-) $(libs-n) $(libs-))))
651
652init-y := $(patsubst %/, %/built-in.o, $(init-y))
653core-y := $(patsubst %/, %/built-in.o, $(core-y))
654drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
655net-y := $(patsubst %/, %/built-in.o, $(net-y))
656libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
657libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
658libs-y := $(libs-y1) $(libs-y2)
659
660# Build vmlinux
661# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200662# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200664# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665# Ordering when linking is important, and $(vmlinux-init) must be first.
666#
667# vmlinux
668# ^
669# |
670# +-< $(vmlinux-init)
671# | +--< init/version.o + more
672# |
673# +--< $(vmlinux-main)
674# | +--< driver/built-in.o mm/built-in.o + more
675# |
676# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
677#
678# vmlinux version (uname -v) cannot be updated during normal
679# descending-into-subdirs phase since we do not yet know if we need to
680# update vmlinux.
681# Therefore this step is delayed until just before final link of vmlinux -
682# except in the kallsyms case where it is done just before adding the
683# symbols to the kernel.
684#
685# System.map is generated to document addresses of all kernel symbols
686
687vmlinux-init := $(head-y) $(init-y)
688vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
689vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200690vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100691export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
693# Rule to link vmlinux - also used during CONFIG_KALLSYMS
694# May be overridden by arch/$(ARCH)/Makefile
695quiet_cmd_vmlinux__ ?= LD $@
696 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
697 -T $(vmlinux-lds) $(vmlinux-init) \
698 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200699 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701# Generate new vmlinux version
702quiet_cmd_vmlinux_version = GEN .version
703 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200704 if [ ! -r .version ]; then \
705 rm -f .version; \
706 echo 1 >.version; \
707 else \
708 mv .version .old_version; \
709 expr 0$$(cat .old_version) + 1 >.version; \
710 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 $(MAKE) $(build)=init
712
713# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200714quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
716
717# Link of vmlinux
718# If CONFIG_KALLSYMS is set .version is already updated
719# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700720# Use + in front of the vmlinux_version rule to silent warning with make -j2
721# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700723 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
725
726 $(call cmd,vmlinux__)
727 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
728
Sam Ravnborg46352812006-08-08 21:41:18 +0200729 $(Q)$(if $($(quiet)cmd_sysmap), \
730 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
731 $(cmd_sysmap) $@ System.map; \
732 if [ $$? -ne 0 ]; then \
733 rm -f $@; \
734 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 fi;
736 $(verify_kallsyms)
737endef
738
739
740ifdef CONFIG_KALLSYMS
741# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
742# It's a three stage process:
743# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
744# empty
745# Running kallsyms on that gives us .tmp_kallsyms1.o with
746# the right size - vmlinux version (uname -v) is updated during this step
747# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
748# but due to the added section, some addresses have shifted.
749# From here, we generate a correct .tmp_kallsyms2.o
750# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
751# o Verify that the System.map from vmlinux matches the map from
752# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
753# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
754# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
755# temporary bypass to allow the kernel to be built while the
756# maintainers work out what went wrong with kallsyms.
757
758ifdef CONFIG_KALLSYMS_EXTRA_PASS
759last_kallsyms := 3
760else
761last_kallsyms := 2
762endif
763
764kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
765
766define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200767 $(Q)$(if $($(quiet)cmd_sysmap), \
768 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200770 $(Q)cmp -s System.map .tmp_System.map || \
771 (echo Inconsistent kallsyms data; \
772 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 rm .tmp_kallsyms* ; /bin/false )
774endef
775
776# Update vmlinux version before link
777# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200778# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779cmd_ksym_ld = $(cmd_vmlinux__)
780define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200781 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 +$(call cmd,vmlinux_version)
783 $(call cmd,vmlinux__)
784 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
785endef
786
787# Generate .S file with all kernel symbols
788quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100789 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
790 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100792.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 $(call if_changed_dep,as_o_S)
794
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100795.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 $(call cmd,kallsyms)
797
798# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100799.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
800 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100802.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
803 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100805.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
806 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807
808# Needs to visit scripts/ before $(KALLSYMS) can be used.
809$(KALLSYMS): scripts ;
810
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000811# Generate some data for debugging strange kallsyms problems
812debug_kallsyms: .tmp_map$(last_kallsyms)
813
814.tmp_map%: .tmp_vmlinux% FORCE
815 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
816
817.tmp_map3: .tmp_map2
818
819.tmp_map2: .tmp_map1
820
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821endif # ifdef CONFIG_KALLSYMS
822
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200823# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
824# relevant sections renamed as per the linker script.
825quiet_cmd_vmlinux-modpost = LD $@
826 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
827 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200828 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200829define rule_vmlinux-modpost
830 :
831 +$(call cmd,vmlinux-modpost)
832 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
833 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
834endef
835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100837vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700838ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100839 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700840endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700841ifdef CONFIG_SAMPLES
842 $(Q)$(MAKE) $(build)=samples
843endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700844ifdef CONFIG_BUILD_DOCSRC
845 $(Q)$(MAKE) $(build)=Documentation
846endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200847 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200849 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Sam Ravnborg310f8242008-01-21 22:57:09 +0100851# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100852ifdef CONFIG_KALLSYMS
853.tmp_vmlinux1: vmlinux.o
854endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200855
856modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
857vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200858 $(call if_changed_rule,vmlinux-modpost)
859
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860# The actual objects are generated when descending,
861# make sure no implicit rule kicks in
862$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
863
864# Handle descending into subdirectories listed in $(vmlinux-dirs)
865# Preset locale variables to speed up the build process. Limit locale
866# tweaks to this spot to avoid wrong language settings when running
867# make menuconfig etc.
868# Error messages still appears in the original language
869
Paul Smith4f193362006-03-05 17:14:10 -0500870PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200871$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 $(Q)$(MAKE) $(build)=$@
873
Sam Ravnborgcb584552006-01-09 21:20:34 +0100874# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100875#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400876# The KERNELRELEASE value built here is stored in the file
877# include/config/kernel.release, and is used when executing several
878# make targets, such as "make install" or "make modules_install."
879#
880# The eventual kernel release string consists of the following fields,
881# shown in a hierarchical format to show how smaller parts are concatenated
882# to form the larger and final value, with values coming from places like
883# the Makefile, kernel config options, make command line options and/or
884# SCM tag information.
885#
886# $(KERNELVERSION)
887# $(VERSION) eg, 2
888# $(PATCHLEVEL) eg, 6
889# $(SUBLEVEL) eg, 18
890# $(EXTRAVERSION) eg, -rc6
891# $(localver-full)
892# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100893# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400894# $(CONFIG_LOCALVERSION) (from kernel config setting)
895# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
896# ./scripts/setlocalversion (SCM tag, if one exists)
897# $(LOCALVERSION) (from make command line if provided)
898#
899# Note how the final $(localver-auto) string is included *only* if the
900# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
901# moment, only git is supported but other SCMs can edit the script
902# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100903
Oleg Verych76c32952007-02-06 02:18:22 +0100904pattern = ".*/localversion[^~]*"
905string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800906 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100907
Oleg Verych76c32952007-02-06 02:18:22 +0100908localver = $(subst $(space),, $(string) \
909 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200910
Sam Ravnborgcb584552006-01-09 21:20:34 +0100911# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
912# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200913# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100914#
Josh Huntb925dbf2009-02-12 10:16:05 -0800915# .scmversion is used when generating rpm packages so we do not loose
916# the version information from the SCM when we do the build of the kernel
917# from the copied source
Sam Ravnborgcb584552006-01-09 21:20:34 +0100918ifdef CONFIG_LOCALVERSION_AUTO
Josh Huntb925dbf2009-02-12 10:16:05 -0800919
920ifeq ($(wildcard .scmversion),)
921 _localver-auto = $(shell $(CONFIG_SHELL) \
922 $(srctree)/scripts/setlocalversion $(srctree))
923else
924 _localver-auto = $(shell cat .scmversion 2> /dev/null)
925endif
926
Sam Ravnborgcb584552006-01-09 21:20:34 +0100927 localver-auto = $(LOCALVERSION)$(_localver-auto)
928endif
929
930localver-full = $(localver)$(localver-auto)
931
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700932# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100933kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700934include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100935 $(Q)rm -f $@
936 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100937
938
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200940# or the modules are listed in "prepare".
941# A multi level approach is used. prepareN is processed before prepareN-1.
942# archprepare is used in arch Makefiles and when processed asm symlink,
943# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200945# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500946PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200947
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200948# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949# and if so do:
950# 1) Check that make has not been executed in the kernel src $(srctree)
951# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700952prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500954 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700955 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 echo " $(srctree) is not clean, please run 'make mrproper'";\
957 echo " in the '$(srctree)' directory.";\
958 /bin/false; \
959 fi;
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200960 $(Q)if [ ! -d include2 ]; then \
961 mkdir -p include2; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200962 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200963 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964endif
965
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200966# prepare2 creates a makefile if using a separate output directory
967prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968
Roman Zippel3eb3c742007-01-10 14:45:28 +0100969prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
970 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200971 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200973archprepare: prepare1 scripts_basic
974
975prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200976 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200977 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200978
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800980prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200982# Leave this as default for preprocessing vmlinux.lds.S, which is now
983# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984
985export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
986
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200987# The asm symlink changes when $(ARCH) changes.
988# Detect this and ask user to run make mrproper
Sam Ravnborgdcc2da12008-10-25 22:58:23 +0200989# If asm is a stale symlink (point to dir that does not exist) remove it
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200990define check-symlink
991 set -e; \
992 if [ -L include/asm ]; then \
993 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
994 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200995 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
996 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200997 exit 1; \
998 fi; \
Sam Ravnborgdcc2da12008-10-25 22:58:23 +0200999 test -e $$asmlink || rm include/asm; \
1000 elif [ -d include/asm ]; then \
1001 echo "ERROR: $@ is a directory but a symlink was expected";\
1002 exit 1; \
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001003 fi
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001004endef
1005
1006# We create the target directory of the symlink if it does
Anisse Astier5a9e67b2009-01-06 11:32:22 +01001007# not exist so the test in check-symlink works and we have a
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001008# directory for generated filesas used by some architectures.
1009define create-symlink
1010 if [ ! -L include/asm ]; then \
Mike Frysingerfd54f502008-11-06 03:31:35 -05001011 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001012 if [ ! -d include/asm-$(SRCARCH) ]; then \
1013 mkdir -p include/asm-$(SRCARCH); \
1014 fi; \
1015 ln -fsn asm-$(SRCARCH) $@; \
1016 fi
1017endef
1018
1019include/asm: FORCE
1020 $(Q)$(check-symlink)
1021 $(Q)$(create-symlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023# Generate some files
1024# ---------------------------------------------------------------------------
1025
1026# KERNELRELEASE can change from a few different places, meaning version.h
1027# needs to be updated, so this check is forced on all builds
1028
1029uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001030define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001032 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1033 exit 1; \
1034 fi; \
1035 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036endef
1037
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001038define filechk_version.h
1039 (echo \#define LINUX_VERSION_CODE $(shell \
1040 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1041 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1042endef
1043
1044include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 $(call filechk,version.h)
1046
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001047include/linux/utsrelease.h: include/config/kernel.release FORCE
1048 $(call filechk,utsrelease.h)
1049
Vegard Nossum179efcb2008-12-16 12:33:43 +01001050PHONY += headerdep
1051headerdep:
1052 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1053
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054# ---------------------------------------------------------------------------
1055
Paul Smith4f193362006-03-05 17:14:10 -05001056PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057depend dep:
1058 @echo '*** Warning: make $@ is unnecessary now.'
1059
1060# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001061# Firmware install
1062INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1063export INSTALL_FW_PATH
1064
1065PHONY += firmware_install
1066firmware_install: FORCE
1067 @mkdir -p $(objtree)/firmware
1068 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1069
1070# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001071# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001072
Sam Ravnborge6883b12008-06-05 16:43:46 +02001073#Default location for installed headers
1074export INSTALL_HDR_PATH = $(objtree)/usr
1075
Sam Ravnborge6883b12008-06-05 16:43:46 +02001076hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001077# Find out where the Kbuild file is located to support
1078# arch/$(ARCH)/include/asm
1079hdr-dir = $(strip \
1080 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1081 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1082
1083# If we do an all arch process set dst to asm-$(hdr-arch)
1084hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001085
1086PHONY += __headers
1087__headers: include/linux/version.h scripts_basic FORCE
1088 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001089
1090PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001091headers_install_all:
1092 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001093
David Woodhouse8d730cf2006-06-18 11:58:39 +01001094PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001095headers_install: __headers
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001096 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1097 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001098 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001099 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001100
Mike Frysinger1f857122007-02-14 00:33:02 -08001101PHONY += headers_check_all
1102headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001103 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001104
David Woodhouse68475352006-06-18 12:02:10 +01001105PHONY += headers_check
1106headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001107 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001108 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001109
David Woodhouse8d730cf2006-06-18 11:58:39 +01001110# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111# Modules
1112
1113ifdef CONFIG_MODULES
1114
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001115# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
1117all: modules
1118
1119# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001120#
1121# A module can be listed more than once in obj-m resulting in
1122# duplicate lines in modules.order files. Those are removed
1123# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124
Paul Smith4f193362006-03-05 17:14:10 -05001125PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001127 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001128 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001129 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001130 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131
1132
1133# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001134PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001135modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
1137# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001138PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139modules_install: _modinst_ _modinst_post
1140
Paul Smith4f193362006-03-05 17:14:10 -05001141PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001143 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 echo "Warning: you may need to install module-init-tools"; \
1145 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1146 sleep 1; \
1147 fi
1148 @rm -rf $(MODLIB)/kernel
1149 @rm -f $(MODLIB)/source
1150 @mkdir -p $(MODLIB)/kernel
1151 @ln -s $(srctree) $(MODLIB)/source
1152 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1153 rm -f $(MODLIB)/build ; \
1154 ln -s $(objtree) $(MODLIB)/build ; \
1155 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001156 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001157 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001159# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160# boot a modules.dep even before / is mounted read-write. However the
1161# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001162PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001164 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001165 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
1167else # CONFIG_MODULES
1168
1169# Modules not configured
1170# ---------------------------------------------------------------------------
1171
1172modules modules_install: FORCE
1173 @echo
1174 @echo "The present kernel configuration has modules disabled."
1175 @echo "Type 'make config' and enable loadable module support."
1176 @echo "Then build a kernel with module support enabled."
1177 @echo
1178 @exit 1
1179
1180endif # CONFIG_MODULES
1181
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182###
1183# Cleaning is done on three levels.
1184# make clean Delete most generated files
1185# Leave enough to build external modules
1186# make mrproper Delete the current configuration, and all generated files
1187# make distclean Remove editor backup files, patch leftover files and the like
1188
1189# Directories & files removed with 'make clean'
1190CLEAN_DIRS += $(MODVERDIR)
1191CLEAN_FILES += vmlinux System.map \
1192 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1193
1194# Directories & files removed with 'make mrproper'
Sam Ravnborgf14875a2009-04-18 23:51:08 +02001195MRPROPER_DIRS += include/config include2 usr/include include/generated
Tore Anderson50aa88e2006-01-07 15:34:40 +01001196MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001197 include/linux/autoconf.h include/linux/version.h \
1198 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001199 include/linux/bounds.h include/asm*/asm-offsets.h \
Alexey Dobriyanc28ca3a2008-06-23 04:05:40 +04001200 Module.symvers Module.markers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201
1202# clean - Delete most, but leave enough to build external modules
1203#
1204clean: rm-dirs := $(CLEAN_DIRS)
1205clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001206clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
Paul Smith4f193362006-03-05 17:14:10 -05001208PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209$(clean-dirs):
1210 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1211
1212clean: archclean $(clean-dirs)
1213 $(call cmd,rmdirs)
1214 $(call cmd,rmfiles)
1215 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001216 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001217 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001218 -o -name '*.symtypes' -o -name 'modules.order' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001219 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
1220 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221
1222# mrproper - Delete all generated files, including .config
1223#
1224mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1225mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1226mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1227
Paul Smith4f193362006-03-05 17:14:10 -05001228PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229$(mrproper-dirs):
1230 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1231
1232mrproper: clean archmrproper $(mrproper-dirs)
1233 $(call cmd,rmdirs)
1234 $(call cmd,rmfiles)
1235
1236# distclean
1237#
Paul Smith4f193362006-03-05 17:14:10 -05001238PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239
1240distclean: mrproper
1241 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001242 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001244 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1246 -type f -print | xargs rm -f
1247
1248
1249# Packaging of the kernel to various formats
1250# ---------------------------------------------------------------------------
1251# rpm target kept for backward compatibility
1252package-dir := $(srctree)/scripts/package
1253
Zach Brown031ecc62006-06-08 22:12:37 -07001254%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001255 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001256rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001257 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
1259
1260# Brief documentation of the typical targets used
1261# ---------------------------------------------------------------------------
1262
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001263boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001265board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1266board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
1268help:
1269 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001270 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001271 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001272 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001273 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 @echo ''
1275 @echo 'Configuration targets:'
1276 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1277 @echo ''
1278 @echo 'Other generic targets:'
1279 @echo ' all - Build all targets marked with [*]'
1280 @echo '* vmlinux - Build the bare kernel'
1281 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001282 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001283 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1284 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 @echo ' dir/ - Build all files in dir and below'
1286 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001287 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001288 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289 @echo ' tags/TAGS - Generate tags file for editors'
1290 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001291 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001292 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001293 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001294 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001295 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297 @echo ' checkstack - Generate a list of stack hogs'
1298 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001299 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001300 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001301 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001302 @echo ' headers_check - Sanity check on exported headers'
1303 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001304 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001306 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 @echo ''
1308 @echo 'Documentation targets:'
1309 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1310 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001311 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001313 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314 @echo ''
1315 @$(if $(boards), \
1316 $(foreach b, $(boards), \
1317 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1318 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001319 @$(if $(board-dirs), \
1320 $(foreach b, $(board-dirs), \
1321 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1322 printf " %-16s - Show all of the above\\n" help-boards; \
1323 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324
1325 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001326 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001328 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1329 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 @echo ''
1331 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1332 @echo 'For further info see the ./README file'
1333
1334
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001335help-board-dirs := $(addprefix help-,$(board-dirs))
1336
1337help-boards: $(help-board-dirs)
1338
1339boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1340
1341$(help-board-dirs): help-%:
1342 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1343 @$(if $(boards-per-dir), \
1344 $(foreach b, $(boards-per-dir), \
1345 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1346 echo '')
1347
1348
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349# Documentation targets
1350# ---------------------------------------------------------------------------
1351%docs: scripts_basic FORCE
1352 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1353
1354else # KBUILD_EXTMOD
1355
1356###
1357# External module support.
1358# When building external modules the kernel used as basis is considered
1359# read-only, and no consistency checks are made and the make
1360# system is not used on the basis kernel. If updates are required
1361# in the basis kernel ordinary make commands (without M=...) must
1362# be used.
1363#
1364# The following are the only valid targets when building external
1365# modules.
1366# make M=dir clean Delete all automatically generated files
1367# make M=dir modules Make all modules in specified dir
1368# make M=dir Same as 'make M=dir modules'
1369# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001370# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371# Assumes install directory is already created
1372
1373# We are always building modules
1374KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001375PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001377 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
Paul Smith4f193362006-03-05 17:14:10 -05001379PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380$(objtree)/Module.symvers:
1381 @test -e $(objtree)/Module.symvers || ( \
1382 echo; \
1383 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1384 echo " is missing; modules will have no dependencies and modversions."; \
1385 echo )
1386
1387module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001388PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389$(module-dirs): crmodverdir $(objtree)/Module.symvers
1390 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1391
1392modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001393 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001394 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395
Paul Smith4f193362006-03-05 17:14:10 -05001396PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001397modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001398
Paul Smith4f193362006-03-05 17:14:10 -05001399install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1400PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001401_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001402 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001403 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404
Paul Smith4f193362006-03-05 17:14:10 -05001405PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001406_emodinst_post: _emodinst_
1407 $(call cmd,depmod)
1408
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1410
Paul Smith4f193362006-03-05 17:14:10 -05001411PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412$(clean-dirs):
1413 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1414
1415clean: rm-dirs := $(MODVERDIR)
Frédéric Brière0c560422009-04-19 12:58:40 -04001416clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1417 $(KBUILD_EXTMOD)/Module.markers \
1418 $(KBUILD_EXTMOD)/modules.order
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419clean: $(clean-dirs)
1420 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001421 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001423 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001424 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1425 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426
1427help:
1428 @echo ' Building external modules.'
1429 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1430 @echo ''
1431 @echo ' modules - default target, build the module(s)'
1432 @echo ' modules_install - install the module'
1433 @echo ' clean - remove generated files in module directory only'
1434 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001435
1436# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001437PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001438prepare: ;
1439scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440endif # KBUILD_EXTMOD
1441
1442# Generate tags for editors
1443# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001444quiet_cmd_tags = GEN $@
1445 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
Sam Ravnborga680eed2008-12-03 22:24:13 +01001447tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 $(call cmd,tags)
1449
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450# Scripts to check various things for consistency
1451# ---------------------------------------------------------------------------
1452
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453includecheck:
1454 find * $(RCS_FIND_IGNORE) \
1455 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001456 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457
1458versioncheck:
1459 find * $(RCS_FIND_IGNORE) \
1460 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001461 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463namespacecheck:
1464 $(PERL) $(srctree)/scripts/namespace.pl
1465
Adrian Bunk295ac052007-08-24 23:04:56 +02001466export_report:
1467 $(PERL) $(srctree)/scripts/export_report.pl
1468
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469endif #ifeq ($(config-targets),1)
1470endif #ifeq ($(mixed-targets),1)
1471
Roman Zippelc30a02e2006-06-08 22:12:50 -07001472PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001473
Jeff Dike011e3a92006-12-13 00:34:12 -08001474# UML needs a little special treatment here. It wants to use the host
1475# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1476# else wants $(ARCH), including people doing cross-builds, which means
1477# that $(SUBARCH) doesn't work here.
1478ifeq ($(ARCH), um)
1479CHECKSTACK_ARCH := $(SUBARCH)
1480else
1481CHECKSTACK_ARCH := $(ARCH)
1482endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483checkstack:
1484 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001485 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486
1487kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001488 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1489 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001490kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001491 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492
Sam Ravnborg06300b22006-01-25 07:13:18 +01001493# Single targets
1494# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001495# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001496# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001497# - build with separate output dir 'make O=...'
1498# - external modules
1499#
1500# target-dir => where to store outputfile
1501# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001502
Sam Ravnborg06300b22006-01-25 07:13:18 +01001503ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001504 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001505 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001506else
1507 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001508 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1509 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001510endif
1511
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001512%.s: %.c prepare scripts FORCE
1513 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1514%.i: %.c prepare scripts FORCE
1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1516%.o: %.c prepare scripts FORCE
1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1518%.lst: %.c prepare scripts FORCE
1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1520%.s: %.S prepare scripts FORCE
1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1522%.o: %.S prepare scripts FORCE
1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001524%.symtypes: %.c prepare scripts FORCE
1525 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001526
1527# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001528/: prepare scripts FORCE
1529 $(cmd_crmodverdir)
1530 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1531 $(build)=$(build-dir)
1532%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001533 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001534 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001535 $(build)=$(build-dir)
1536%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001537 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001538 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001539 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001540 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001541
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542# FIXME Should go into a make.lib or something
1543# ===========================================================================
1544
1545quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1546 cmd_rmdirs = rm -rf $(rm-dirs)
1547
1548quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1549 cmd_rmfiles = rm -f $(rm-files)
1550
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001551# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001552quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1553 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001554 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001555 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001556 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001557 $(KERNELRELEASE); \
1558 fi
1559
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001560# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001561# clean it up only when building all modules
1562cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1563 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564
Sam Ravnborg222d3942007-10-15 21:59:31 +02001565a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001566 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001567 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568
1569quiet_cmd_as_o_S = AS $@
1570cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1571
1572# read all saved command lines
1573
1574targets := $(wildcard $(sort $(targets)))
1575cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1576
1577ifneq ($(cmd_files),)
1578 $(cmd_files): ; # Do not try to update included dependency files
1579 include $(cmd_files)
1580endif
1581
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1583# Usage:
1584# $(Q)$(MAKE) $(clean)=dir
1585clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1586
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587endif # skip-makefile
1588
Paul Smith4f193362006-03-05 17:14:10 -05001589PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001591
Paul Smith4f193362006-03-05 17:14:10 -05001592# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001593# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001594.PHONY: $(PHONY)