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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds57f8f7b2008-10-23 20:06:52 -07003SUBLEVEL = 28
Linus Torvalds4a6908a2008-12-24 15:26:37 -08004EXTRAVERSION =
Linus Torvalds061e41f2008-12-01 19:59:23 -08005NAME = Erotic Pickled Herring
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
38ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42endif
43ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45endif
46
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040047# Call a source code checker (by default, "sparse") as part of the
48# C compilation.
49#
50# Use 'make C=1' to enable checking of only re-compiled files.
51# Use 'make C=2' to enable checking of *all* source files, regardless
52# of whether they are re-compiled or not.
53#
54# See the file "Documentation/sparse.txt" for more details, including
55# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61endif
62ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64endif
65
66# Use make M=dir to specify directory of external module to build
67# Old syntax make ... SUBDIRS=$PWD is still supported
68# Setting the environment variable KBUILD_EXTMOD take precedence
69ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71endif
72ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76endif
77
78
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020084#
Linus Torvalds1da177e2005-04-16 15:20:36 -070085# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(KBUILD_SRC),)
98
99# OK, Make called in directory where kernel src resides
100# Do we want to locate output files in a separate directory?
101ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105endif
106
107# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500108PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109_all:
110
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100111# Cancel implicit rules on top Makefile
112$(CURDIR)/Makefile Makefile: ;
113
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114ifneq ($(KBUILD_OUTPUT),)
115# Invoke a second make in the output directory, passing relevant variables
116# check that the output directory actually exists
117saved-output := $(KBUILD_OUTPUT)
118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
119$(if $(KBUILD_OUTPUT),, \
120 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Milton Miller0b357862007-09-21 18:09:02 -0500122PHONY += $(MAKECMDGOALS) sub-make
123
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100124$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500125 $(Q)@:
126
127sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
129 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
131 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133# Leave processing to above invocation of make
134skip-makefile := 1
135endif # ifneq ($(KBUILD_OUTPUT),)
136endif # ifeq ($(KBUILD_SRC),)
137
138# We process the rest of the Makefile if this is the final invocation of make
139ifeq ($(skip-makefile),)
140
141# If building an external module we do not care about the all: rule
142# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500143PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144ifeq ($(KBUILD_EXTMOD),)
145_all: all
146else
147_all: modules
148endif
149
150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
151TOPDIR := $(srctree)
152# FIXME - TOPDIR is obsolete, use srctree/objtree
153objtree := $(CURDIR)
154src := $(srctree)
155obj := $(objtree)
156
Mattia Dongili0f558c32006-02-19 13:50:37 +0100157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159export srctree objtree VPATH TOPDIR
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162# SUBARCH tells the usermode build what the underlying arch is. That is set
163# first, and if a usermode build is happening, the "ARCH=um" on the command
164# line overrides the setting of ARCH below. If a native build is happening,
165# then ARCH is assigned, getting whatever value it gets normally, and
166# SUBARCH is subsequently ignored.
167
168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt12760cb2007-11-23 14:24:25 +0900172 -e s/sh.*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174# Cross compiling and selecting different set of gcc/bin-utils
175# ---------------------------------------------------------------------------
176#
177# When performing cross compilation for other architectures ARCH shall be set
178# to the target architecture. (See arch/* for the possibilities).
179# ARCH can be set during invocation of make:
180# make ARCH=ia64
181# Another way is to have ARCH set in the environment.
182# The default ARCH is the host where make is executed.
183
184# CROSS_COMPILE specify the prefix used for all executables used
185# during compilation. Only gcc and related bin-utils executables
186# are prefixed with $(CROSS_COMPILE).
187# CROSS_COMPILE can be set on the command line
188# make CROSS_COMPILE=ia64-linux-
189# Alternatively CROSS_COMPILE can be set in the environment.
190# Default value for CROSS_COMPILE is not to prefix executables
191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100192export KBUILD_BUILDHOST := $(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193ARCH ?= $(SUBARCH)
194CROSS_COMPILE ?=
195
196# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200197UTS_MACHINE := $(ARCH)
198SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Sam Ravnborgd746d642007-11-12 20:14:19 +0100200# Additional ARCH settings for x86
201ifeq ($(ARCH),i386)
202 SRCARCH := x86
203endif
204ifeq ($(ARCH),x86_64)
205 SRCARCH := x86
206endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200207
Sam Ravnborg5e538792008-12-02 23:17:12 -0800208# Additional ARCH settings for sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200209ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800210 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200211endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200212
Sam Ravnborg5e538792008-12-02 23:17:12 -0800213# Where to locate arch specific headers
214hdr-arch := $(SRCARCH)
215
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700216KCONFIG_CONFIG ?= .config
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218# SHELL used by kbuild
219CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
220 else if [ -x /bin/bash ]; then echo /bin/bash; \
221 else echo sh; fi ; fi)
222
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200223HOSTCC = gcc
224HOSTCXX = g++
225HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
226HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200228# Decide whether to build built-in, modular, or both.
229# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
231KBUILD_MODULES :=
232KBUILD_BUILTIN := 1
233
234# If we have only "make modules", don't compile built-in objects.
235# When we're building modules with modversions, we need to consider
236# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200237# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
239ifeq ($(MAKECMDGOALS),modules)
240 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
241endif
242
243# If we have "make <whatever> modules", compile modules
244# in addition to whatever we do anyway.
245# Just "make" or "make all" shall build modules as well
246
247ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
248 KBUILD_MODULES := 1
249endif
250
251ifeq ($(MAKECMDGOALS),)
252 KBUILD_MODULES := 1
253endif
254
Sam Ravnborge579d352005-07-27 08:10:10 +0200255export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
257
258# Beautify output
259# ---------------------------------------------------------------------------
260#
261# Normally, we echo the whole command before executing it. By making
262# that echo $($(quiet)$(cmd)), we now have the possibility to set
263# $(quiet) to choose other forms of output instead, e.g.
264#
265# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
266# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
267#
268# If $(quiet) is empty, the whole command will be printed.
269# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200270# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271# the variable $(silent_cmd_cc_o_c) doesn't exist.
272#
Adrian Bunka58a4142006-01-10 00:08:17 +0100273# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274# for commands that shall be hidden in non-verbose mode.
275#
276# $(Q)ln $@ :<
277#
278# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
279# If KBUILD_VERBOSE equals 1 then the above command is displayed.
280
281ifeq ($(KBUILD_VERBOSE),1)
282 quiet =
283 Q =
284else
285 quiet=quiet_
286 Q = @
287endif
288
289# If the user is running make -s (silent mode), suppress echoing of
290# commands
291
292ifneq ($(findstring s,$(MAKEFLAGS)),)
293 quiet=silent_
294endif
295
296export quiet Q KBUILD_VERBOSE
297
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
299# Look for make include files relative to root of kernel src
300MAKEFLAGS += --include-dir=$(srctree)
301
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100302# We need some generic definitions (do not try to remake the file).
303$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800304include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
306# Make variables (CC, etc...)
307
308AS = $(CROSS_COMPILE)as
309LD = $(CROSS_COMPILE)ld
310CC = $(CROSS_COMPILE)gcc
311CPP = $(CC) -E
312AR = $(CROSS_COMPILE)ar
313NM = $(CROSS_COMPILE)nm
314STRIP = $(CROSS_COMPILE)strip
315OBJCOPY = $(CROSS_COMPILE)objcopy
316OBJDUMP = $(CROSS_COMPILE)objdump
317AWK = awk
318GENKSYMS = scripts/genksyms/genksyms
319DEPMOD = /sbin/depmod
320KALLSYMS = scripts/kallsyms
321PERL = perl
322CHECK = sparse
323
Al Viroaf4ca452005-10-21 02:55:38 -0400324CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(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 =
331
332
333# Use LINUXINCLUDE when you must reference the include/ directory.
334# Needed to be compatible with the O= option
335LINUXINCLUDE := -Iinclude \
Russell King2dd34b42005-10-30 22:42:11 +0100336 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
Sam Ravnborg5e4786f2008-06-22 21:48:26 +0200337 -I$(srctree)/arch/$(hdr-arch)/include \
338 -include include/linux/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100340KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200342KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700343 -fno-strict-aliasing -fno-common \
344 -Werror-implicit-function-declaration
Sam Ravnborg222d3942007-10-15 21:59:31 +0200345KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700347# Read KERNELRELEASE from include/config/kernel.release (if it exists)
348KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100349KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100350
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200351export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100352export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200353export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
354export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
Sam Ravnborg06c50402007-10-15 22:17:25 +0200356export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200357export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
Sam Ravnborg222d3942007-10-15 21:59:31 +0200358export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360# When compiling out-of-tree modules, put MODVERDIR in the module
361# tree rather than in the kernel tree. The kernel tree might
362# even be read-only.
363export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
364
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365# Files to ignore in find ... statements
366
Trond Myklebust406119f2005-10-27 14:46:53 -0400367RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
368export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370# ===========================================================================
371# Rules shared between *config targets and build targets
372
373# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500374PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375scripts_basic:
376 $(Q)$(MAKE) $(build)=scripts/basic
377
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200378# To avoid any implicit rule to kick in, define an empty command.
379scripts/basic/%: scripts_basic ;
380
Paul Smith4f193362006-03-05 17:14:10 -0500381PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200382# outputmakefile generates a Makefile in the output directory, if using a
383# separate output directory. This allows convenient use of make in the
384# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200386ifneq ($(KBUILD_SRC),)
387 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
388 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
389endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
391# To make sure we do not include .config for any of the *config targets
392# catch them early, and hand them over to scripts/kconfig/Makefile
393# It is allowed to specify more targets when calling make, including
394# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200395# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396# Detect when mixed targets is specified, and make a second invocation
397# of make so .config is not included in this case either (for *config).
398
Roman Zippel3eb3c742007-01-10 14:45:28 +0100399no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700400 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100401 include/linux/version.h headers_% \
402 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
404config-targets := 0
405mixed-targets := 0
406dot-config := 1
407
408ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
409 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
410 dot-config := 0
411 endif
412endif
413
414ifeq ($(KBUILD_EXTMOD),)
415 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
416 config-targets := 1
417 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
418 mixed-targets := 1
419 endif
420 endif
421endif
422
423ifeq ($(mixed-targets),1)
424# ===========================================================================
425# We're called with mixed targets (*config and build targets).
426# Handle them one by one.
427
428%:: FORCE
429 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
430
431else
432ifeq ($(config-targets),1)
433# ===========================================================================
434# *config targets only - make sure prerequisites are updated, and descend
435# in scripts/kconfig to make the *config target
436
437# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
438# KBUILD_DEFCONFIG may point out an alternative default configuration
439# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200440include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400441export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100443config: scripts_basic outputmakefile FORCE
444 $(Q)mkdir -p include/linux include/config
445 $(Q)$(MAKE) $(build)=scripts/kconfig $@
446
447%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700448 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 $(Q)$(MAKE) $(build)=scripts/kconfig $@
450
451else
452# ===========================================================================
453# Build targets only - this includes vmlinux, arch specific targets, clean
454# targets and others. In general all targets except *config targets.
455
456ifeq ($(KBUILD_EXTMOD),)
457# Additional helpers built in scripts/
458# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200459# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500460PHONY += scripts
Roman Zippel2e3646e2006-06-08 22:12:42 -0700461scripts: scripts_basic include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 $(Q)$(MAKE) $(build)=$(@)
463
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464# Objects we will link into vmlinux / subdirs we need to visit
465init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100466drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467net-y := net/
468libs-y := lib/
469core-y := usr/
470endif # KBUILD_EXTMOD
471
472ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200473# Read in config
474-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200476ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477# Read in dependencies to all Kconfig* files, make sure to run
478# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700479-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700482$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
Roman Zippelc955cca2006-06-08 22:12:39 -0700484# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100485# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200486# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100487# we execute the config step to be sure to catch updated Kconfig files
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700488include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
490else
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200491# external modules needs include/linux/autoconf.h and include/config/auto.conf
492# but do not care if they are up-to-date. Use auto.conf to trigger the test
493PHONY += include/config/auto.conf
494
495include/config/auto.conf:
496 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
497 echo; \
498 echo " ERROR: Kernel configuration is invalid."; \
499 echo " include/linux/autoconf.h or $@ are missing."; \
500 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
501 echo; \
502 /bin/false)
503
504endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700505
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506else
507# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700508include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200509endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
511# The all: target is the default when no target is given on the
512# command line.
513# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200514# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515all: vmlinux
516
517ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200518KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200520KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521endif
522
Ralf Baechlebef5b542008-07-16 13:02:24 +0100523include $(srctree)/arch/$(SRCARCH)/Makefile
524
Andi Kleen35bb5b12008-02-22 15:15:03 +0100525ifneq (CONFIG_FRAME_WARN,0)
526KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
527endif
528
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100529# Force gcc to behave correct even for buggy distributions
530# Arch Makefiles may override this setting
531KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200534KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200536KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537endif
538
539ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200540KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200541KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542endif
543
Steven Rostedt606576c2008-10-06 19:06:12 -0400544ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200545KBUILD_CFLAGS += -pg
546endif
547
Sam Ravnborg91341d42008-01-21 21:31:44 +0100548# We trigger additional mismatches with less inlining
549ifdef CONFIG_DEBUG_SECTION_MISMATCH
550KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
551endif
552
Sam Ravnborge8e69932005-04-30 16:51:42 -0700553# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700554NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700555CHECKFLAGS += $(NOSTDINC_FLAGS)
556
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200558KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200560# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200561KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562
Sam Ravnborg06c50402007-10-15 22:17:25 +0200563# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100564# But warn user when we do so
565warn-assign = \
566$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
567
568ifneq ($(KCPPFLAGS),)
569 $(call warn-assign,CPPFLAGS)
570 KBUILD_CPPFLAGS += $(KCPPFLAGS)
571endif
572ifneq ($(KAFLAGS),)
573 $(call warn-assign,AFLAGS)
574 KBUILD_AFLAGS += $(KAFLAGS)
575endif
576ifneq ($(KCFLAGS),)
577 $(call warn-assign,CFLAGS)
578 KBUILD_CFLAGS += $(KCFLAGS)
579endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200580
Roland McGrath18991192007-07-19 01:48:40 -0700581# Use --build-id when available.
582LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
583 $(call ld-option, -Wl$(comma)--build-id,))
584LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
585LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200588# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589# set in the environment
590# Also any assignments in arch/$(ARCH)/Makefile take precedence over
591# this default value
592export KBUILD_IMAGE ?= vmlinux
593
594#
595# INSTALL_PATH specifies where to place the updated kernel and system map
596# images. Default is /boot, but you can set it to other values
597export INSTALL_PATH ?= /boot
598
599#
600# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
601# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200602# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603#
604
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100605MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606export MODLIB
607
Jan Beulich9bb48242008-12-16 11:30:08 +0000608strip-symbols := $(srctree)/scripts/strip-symbols \
609 $(wildcard $(srctree)/arch/$(ARCH)/scripts/strip-symbols)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400610
Theodore Ts'oac031f22006-06-21 20:53:09 -0400611#
Jan Beulichad7a9532008-12-16 11:28:14 +0000612# INSTALL_MOD_STRIP, if defined, will cause modules to be stripped while
613# they get installed. If INSTALL_MOD_STRIP is '1', then the default
614# options (see below) will be used. Otherwise, INSTALL_MOD_STRIP will
615# be used as the option(s) to the objcopy command.
Theodore Ts'oac031f22006-06-21 20:53:09 -0400616ifdef INSTALL_MOD_STRIP
617ifeq ($(INSTALL_MOD_STRIP),1)
Jan Beulich9bb48242008-12-16 11:30:08 +0000618mod_strip_cmd = $(OBJCOPY) --strip-debug
619ifeq ($(CONFIG_KALLSYMS_ALL),$(CONFIG_KALLSYMS_STRIP_GENERATED))
620mod_strip_cmd += --wildcard $(addprefix --strip-symbols ,$(strip-symbols))
621endif
Theodore Ts'oac031f22006-06-21 20:53:09 -0400622else
Jan Beulichad7a9532008-12-16 11:28:14 +0000623mod_strip_cmd = $(OBJCOPY) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400624endif # INSTALL_MOD_STRIP=1
625else
Jan Beulichad7a9532008-12-16 11:28:14 +0000626mod_strip_cmd = false
Theodore Ts'oac031f22006-06-21 20:53:09 -0400627endif # INSTALL_MOD_STRIP
628export mod_strip_cmd
629
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630
631ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100632core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
634vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
635 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
636 $(net-y) $(net-m) $(libs-y) $(libs-m)))
637
638vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
639 $(init-n) $(init-) \
640 $(core-n) $(core-) $(drivers-n) $(drivers-) \
641 $(net-n) $(net-) $(libs-n) $(libs-))))
642
643init-y := $(patsubst %/, %/built-in.o, $(init-y))
644core-y := $(patsubst %/, %/built-in.o, $(core-y))
645drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
646net-y := $(patsubst %/, %/built-in.o, $(net-y))
647libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
648libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
649libs-y := $(libs-y1) $(libs-y2)
650
651# Build vmlinux
652# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200653# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200655# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656# Ordering when linking is important, and $(vmlinux-init) must be first.
657#
658# vmlinux
659# ^
660# |
661# +-< $(vmlinux-init)
662# | +--< init/version.o + more
663# |
664# +--< $(vmlinux-main)
665# | +--< driver/built-in.o mm/built-in.o + more
666# |
667# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
668#
669# vmlinux version (uname -v) cannot be updated during normal
670# descending-into-subdirs phase since we do not yet know if we need to
671# update vmlinux.
672# Therefore this step is delayed until just before final link of vmlinux -
673# except in the kallsyms case where it is done just before adding the
674# symbols to the kernel.
675#
676# System.map is generated to document addresses of all kernel symbols
677
678vmlinux-init := $(head-y) $(init-y)
679vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
680vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200681vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100682export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683
684# Rule to link vmlinux - also used during CONFIG_KALLSYMS
685# May be overridden by arch/$(ARCH)/Makefile
686quiet_cmd_vmlinux__ ?= LD $@
687 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
688 -T $(vmlinux-lds) $(vmlinux-init) \
689 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200690 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691
692# Generate new vmlinux version
693quiet_cmd_vmlinux_version = GEN .version
694 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200695 if [ ! -r .version ]; then \
696 rm -f .version; \
697 echo 1 >.version; \
698 else \
699 mv .version .old_version; \
700 expr 0$$(cat .old_version) + 1 >.version; \
701 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 $(MAKE) $(build)=init
703
704# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200705quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
707
708# Link of vmlinux
709# If CONFIG_KALLSYMS is set .version is already updated
710# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700711# Use + in front of the vmlinux_version rule to silent warning with make -j2
712# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700714 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
716
717 $(call cmd,vmlinux__)
718 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
719
Sam Ravnborg46352812006-08-08 21:41:18 +0200720 $(Q)$(if $($(quiet)cmd_sysmap), \
721 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
722 $(cmd_sysmap) $@ System.map; \
723 if [ $$? -ne 0 ]; then \
724 rm -f $@; \
725 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 fi;
727 $(verify_kallsyms)
728endef
729
730
731ifdef CONFIG_KALLSYMS
732# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
733# It's a three stage process:
734# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
735# empty
736# Running kallsyms on that gives us .tmp_kallsyms1.o with
737# the right size - vmlinux version (uname -v) is updated during this step
738# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
739# but due to the added section, some addresses have shifted.
740# From here, we generate a correct .tmp_kallsyms2.o
741# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
742# o Verify that the System.map from vmlinux matches the map from
743# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
744# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
745# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
746# temporary bypass to allow the kernel to be built while the
747# maintainers work out what went wrong with kallsyms.
748
749ifdef CONFIG_KALLSYMS_EXTRA_PASS
750last_kallsyms := 3
751else
752last_kallsyms := 2
753endif
754
755kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
Jan Beulich9bb48242008-12-16 11:30:08 +0000756kallsyms.h := $(wildcard include/config/kallsyms/*.h) $(wildcard include/config/kallsyms/*/*.h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
758define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200759 $(Q)$(if $($(quiet)cmd_sysmap), \
760 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200762 $(Q)cmp -s System.map .tmp_System.map || \
763 (echo Inconsistent kallsyms data; \
764 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 rm .tmp_kallsyms* ; /bin/false )
766endef
767
768# Update vmlinux version before link
769# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200770# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771cmd_ksym_ld = $(cmd_vmlinux__)
772define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200773 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 +$(call cmd,vmlinux_version)
775 $(call cmd,vmlinux__)
776 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
777endef
778
779# Generate .S file with all kernel symbols
780quiet_cmd_kallsyms = KSYM $@
Jan Beulich9bb48242008-12-16 11:30:08 +0000781 cmd_kallsyms = { test $* -eq 0 || $(NM) -n $<; } \
782 | $(KALLSYMS) $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) >$@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
Jan Beulich9bb48242008-12-16 11:30:08 +0000784quiet_cmd_kstrip = STRIP $@
785 cmd_kstrip = $(OBJCOPY) --wildcard $(addprefix --strip$(if $(CONFIG_RELOCATABLE),-unneeded)-symbols ,$(filter %/scripts/strip-symbols,$^)) $< $@
786
787$(foreach n,0 1 2 3,.tmp_kallsyms$(n).o): KBUILD_AFLAGS += -Wa,--strip-local-absolute
788$(foreach n,0 1 2 3,.tmp_kallsyms$(n).o): %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 $(call if_changed_dep,as_o_S)
790
Jan Beulich9bb48242008-12-16 11:30:08 +0000791ifeq ($(CONFIG_KALLSYMS_STRIP_GENERATED),y)
792strip-ext := .stripped
793endif
794
795.tmp_kallsyms%.S: .tmp_vmlinux%$(strip-ext) $(KALLSYMS) $(kallsyms.h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 $(call cmd,kallsyms)
797
Jan Beulich9bb48242008-12-16 11:30:08 +0000798# make -jN seems to have problems with intermediate files, see bug #3330.
799.SECONDARY: $(foreach n,1 2 3,.tmp_vmlinux$(n).stripped)
800.tmp_vmlinux%.stripped: .tmp_vmlinux% $(strip-symbols) $(kallsyms.h)
801 $(call cmd,kstrip)
802
803ifneq ($(CONFIG_DEBUG_INFO),y)
804.tmp_vmlinux%: LDFLAGS_vmlinux += -S
805endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Jan Beulich9bb48242008-12-16 11:30:08 +0000807.tmp_vmlinux%: $(vmlinux-lds) $(vmlinux-all) FORCE
808 $(if $(filter 1,$*),$(call if_changed_rule,ksym_ld),$(call if_changed,vmlinux__))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809
Jan Beulich9bb48242008-12-16 11:30:08 +0000810.tmp_vmlinux0$(strip-ext):
811 $(Q)echo "placeholder" >$@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Jan Beulich9bb48242008-12-16 11:30:08 +0000813.tmp_vmlinux1: .tmp_kallsyms0.o
814.tmp_vmlinux2: .tmp_kallsyms1.o
815.tmp_vmlinux3: .tmp_kallsyms2.o
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816
817# Needs to visit scripts/ before $(KALLSYMS) can be used.
818$(KALLSYMS): scripts ;
819
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000820# Generate some data for debugging strange kallsyms problems
821debug_kallsyms: .tmp_map$(last_kallsyms)
822
823.tmp_map%: .tmp_vmlinux% FORCE
824 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
825
826.tmp_map3: .tmp_map2
827
828.tmp_map2: .tmp_map1
829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830endif # ifdef CONFIG_KALLSYMS
831
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200832# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
833# relevant sections renamed as per the linker script.
834quiet_cmd_vmlinux-modpost = LD $@
835 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
836 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200837 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200838define rule_vmlinux-modpost
839 :
840 +$(call cmd,vmlinux-modpost)
841 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
842 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
843endef
844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100846vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700847ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100848 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700849endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700850ifdef CONFIG_SAMPLES
851 $(Q)$(MAKE) $(build)=samples
852endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700853ifdef CONFIG_BUILD_DOCSRC
854 $(Q)$(MAKE) $(build)=Documentation
855endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200856 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200858 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
Sam Ravnborg310f8242008-01-21 22:57:09 +0100860# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100861ifdef CONFIG_KALLSYMS
862.tmp_vmlinux1: vmlinux.o
863endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200864
865modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
866vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200867 $(call if_changed_rule,vmlinux-modpost)
868
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869# The actual objects are generated when descending,
870# make sure no implicit rule kicks in
871$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
872
873# Handle descending into subdirectories listed in $(vmlinux-dirs)
874# Preset locale variables to speed up the build process. Limit locale
875# tweaks to this spot to avoid wrong language settings when running
876# make menuconfig etc.
877# Error messages still appears in the original language
878
Paul Smith4f193362006-03-05 17:14:10 -0500879PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200880$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 $(Q)$(MAKE) $(build)=$@
882
Sam Ravnborgcb584552006-01-09 21:20:34 +0100883# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100884#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400885# The KERNELRELEASE value built here is stored in the file
886# include/config/kernel.release, and is used when executing several
887# make targets, such as "make install" or "make modules_install."
888#
889# The eventual kernel release string consists of the following fields,
890# shown in a hierarchical format to show how smaller parts are concatenated
891# to form the larger and final value, with values coming from places like
892# the Makefile, kernel config options, make command line options and/or
893# SCM tag information.
894#
895# $(KERNELVERSION)
896# $(VERSION) eg, 2
897# $(PATCHLEVEL) eg, 6
898# $(SUBLEVEL) eg, 18
899# $(EXTRAVERSION) eg, -rc6
900# $(localver-full)
901# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100902# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400903# $(CONFIG_LOCALVERSION) (from kernel config setting)
904# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
905# ./scripts/setlocalversion (SCM tag, if one exists)
906# $(LOCALVERSION) (from make command line if provided)
907#
908# Note how the final $(localver-auto) string is included *only* if the
909# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
910# moment, only git is supported but other SCMs can edit the script
911# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100912
Oleg Verych76c32952007-02-06 02:18:22 +0100913pattern = ".*/localversion[^~]*"
914string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800915 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100916
Oleg Verych76c32952007-02-06 02:18:22 +0100917localver = $(subst $(space),, $(string) \
918 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200919
Sam Ravnborgcb584552006-01-09 21:20:34 +0100920# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
921# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200922# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100923#
924# Currently, only git is supported.
925# Other SCMs can edit scripts/setlocalversion and add the appropriate
926# checks as needed.
927ifdef CONFIG_LOCALVERSION_AUTO
928 _localver-auto = $(shell $(CONFIG_SHELL) \
929 $(srctree)/scripts/setlocalversion $(srctree))
930 localver-auto = $(LOCALVERSION)$(_localver-auto)
931endif
932
933localver-full = $(localver)$(localver-auto)
934
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700935# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100936kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700937include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100938 $(Q)rm -f $@
939 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100940
941
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200943# or the modules are listed in "prepare".
944# A multi level approach is used. prepareN is processed before prepareN-1.
945# archprepare is used in arch Makefiles and when processed asm symlink,
946# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200948# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500949PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200950
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200951# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952# and if so do:
953# 1) Check that make has not been executed in the kernel src $(srctree)
954# 2) Create the include2 directory, used for the second asm symlink
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700955prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500957 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700958 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 echo " $(srctree) is not clean, please run 'make mrproper'";\
960 echo " in the '$(srctree)' directory.";\
961 /bin/false; \
962 fi;
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200963 $(Q)if [ ! -d include2 ]; then \
964 mkdir -p include2; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200965 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
Sam Ravnborg7a48bdd2008-08-06 21:56:53 +0200966 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967endif
968
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200969# prepare2 creates a makefile if using a separate output directory
970prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
Roman Zippel3eb3c742007-01-10 14:45:28 +0100972prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
973 include/asm include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200974 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200976archprepare: prepare1 scripts_basic
977
978prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200979 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200980 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200981
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800983prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200985# Leave this as default for preprocessing vmlinux.lds.S, which is now
986# done in arch/$(ARCH)/kernel/Makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987
988export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
989
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200990# The asm symlink changes when $(ARCH) changes.
991# Detect this and ask user to run make mrproper
Sam Ravnborgdcc2da12008-10-25 22:58:23 +0200992# If asm is a stale symlink (point to dir that does not exist) remove it
Sam Ravnborg2e57d052008-06-22 21:42:06 +0200993define check-symlink
994 set -e; \
995 if [ -L include/asm ]; then \
996 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
997 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
Sam Ravnborgfc333b22007-10-17 23:30:14 +0200998 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
999 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001000 exit 1; \
1001 fi; \
Sam Ravnborgdcc2da12008-10-25 22:58:23 +02001002 test -e $$asmlink || rm include/asm; \
1003 elif [ -d include/asm ]; then \
1004 echo "ERROR: $@ is a directory but a symlink was expected";\
1005 exit 1; \
Sam Ravnborgfc333b22007-10-17 23:30:14 +02001006 fi
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001007endef
1008
1009# We create the target directory of the symlink if it does
1010# not exist so the test in chack-symlink works and we have a
1011# directory for generated filesas used by some architectures.
1012define create-symlink
1013 if [ ! -L include/asm ]; then \
Mike Frysingerfd54f502008-11-06 03:31:35 -05001014 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
Sam Ravnborg2e57d052008-06-22 21:42:06 +02001015 if [ ! -d include/asm-$(SRCARCH) ]; then \
1016 mkdir -p include/asm-$(SRCARCH); \
1017 fi; \
1018 ln -fsn asm-$(SRCARCH) $@; \
1019 fi
1020endef
1021
1022include/asm: FORCE
1023 $(Q)$(check-symlink)
1024 $(Q)$(create-symlink)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026# Generate some files
1027# ---------------------------------------------------------------------------
1028
1029# KERNELRELEASE can change from a few different places, meaning version.h
1030# needs to be updated, so this check is forced on all builds
1031
1032uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001033define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001035 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1036 exit 1; \
1037 fi; \
1038 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039endef
1040
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001041define filechk_version.h
1042 (echo \#define LINUX_VERSION_CODE $(shell \
1043 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1044 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1045endef
1046
1047include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 $(call filechk,version.h)
1049
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001050include/linux/utsrelease.h: include/config/kernel.release FORCE
1051 $(call filechk,utsrelease.h)
1052
Vegard Nossum179efcb2008-12-16 12:33:43 +01001053PHONY += headerdep
1054headerdep:
1055 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1056
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057# ---------------------------------------------------------------------------
1058
Paul Smith4f193362006-03-05 17:14:10 -05001059PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060depend dep:
1061 @echo '*** Warning: make $@ is unnecessary now.'
1062
1063# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001064# Firmware install
1065INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1066export INSTALL_FW_PATH
1067
1068PHONY += firmware_install
1069firmware_install: FORCE
1070 @mkdir -p $(objtree)/firmware
1071 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1072
1073# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001074# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001075
Sam Ravnborge6883b12008-06-05 16:43:46 +02001076#Default location for installed headers
1077export INSTALL_HDR_PATH = $(objtree)/usr
1078
Sam Ravnborge6883b12008-06-05 16:43:46 +02001079hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001080# Find out where the Kbuild file is located to support
1081# arch/$(ARCH)/include/asm
1082hdr-dir = $(strip \
1083 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1084 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1085
1086# If we do an all arch process set dst to asm-$(hdr-arch)
1087hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001088
1089PHONY += __headers
1090__headers: include/linux/version.h scripts_basic FORCE
1091 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001092
1093PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001094headers_install_all:
1095 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001096
David Woodhouse8d730cf2006-06-18 11:58:39 +01001097PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001098headers_install: __headers
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001099 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1100 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001101 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001102 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001103
Mike Frysinger1f857122007-02-14 00:33:02 -08001104PHONY += headers_check_all
1105headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001106 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001107
David Woodhouse68475352006-06-18 12:02:10 +01001108PHONY += headers_check
1109headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001110 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001111 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001112
David Woodhouse8d730cf2006-06-18 11:58:39 +01001113# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114# Modules
1115
1116ifdef CONFIG_MODULES
1117
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001118# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119
1120all: modules
1121
1122# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001123#
1124# A module can be listed more than once in obj-m resulting in
1125# duplicate lines in modules.order files. Those are removed
1126# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127
Paul Smith4f193362006-03-05 17:14:10 -05001128PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001130 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001131 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001132 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001133 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134
1135
1136# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001137PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001138modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
1140# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001141PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142modules_install: _modinst_ _modinst_post
1143
Paul Smith4f193362006-03-05 17:14:10 -05001144PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001146 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 echo "Warning: you may need to install module-init-tools"; \
1148 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1149 sleep 1; \
1150 fi
1151 @rm -rf $(MODLIB)/kernel
1152 @rm -f $(MODLIB)/source
1153 @mkdir -p $(MODLIB)/kernel
1154 @ln -s $(srctree) $(MODLIB)/source
1155 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1156 rm -f $(MODLIB)/build ; \
1157 ln -s $(objtree) $(MODLIB)/build ; \
1158 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001159 @cp -f $(objtree)/modules.order $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001160 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001162# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163# boot a modules.dep even before / is mounted read-write. However the
1164# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001165PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001167 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001168 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169
1170else # CONFIG_MODULES
1171
1172# Modules not configured
1173# ---------------------------------------------------------------------------
1174
1175modules modules_install: FORCE
1176 @echo
1177 @echo "The present kernel configuration has modules disabled."
1178 @echo "Type 'make config' and enable loadable module support."
1179 @echo "Then build a kernel with module support enabled."
1180 @echo
1181 @exit 1
1182
1183endif # CONFIG_MODULES
1184
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185###
1186# Cleaning is done on three levels.
1187# make clean Delete most generated files
1188# Leave enough to build external modules
1189# make mrproper Delete the current configuration, and all generated files
1190# make distclean Remove editor backup files, patch leftover files and the like
1191
1192# Directories & files removed with 'make clean'
1193CLEAN_DIRS += $(MODVERDIR)
1194CLEAN_FILES += vmlinux System.map \
1195 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1196
1197# Directories & files removed with 'make mrproper'
David Woodhouse1ab7a1f2006-09-16 12:15:55 -07001198MRPROPER_DIRS += include/config include2 usr/include
Tore Anderson50aa88e2006-01-07 15:34:40 +01001199MRPROPER_FILES += .config .config.old include/asm .version .old_version \
Roman Zippel3eb3c742007-01-10 14:45:28 +01001200 include/linux/autoconf.h include/linux/version.h \
1201 include/linux/utsrelease.h \
Jan Blunck7d3cc8b2008-05-16 13:54:59 +02001202 include/linux/bounds.h include/asm*/asm-offsets.h \
Alexey Dobriyanc28ca3a2008-06-23 04:05:40 +04001203 Module.symvers Module.markers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
1205# clean - Delete most, but leave enough to build external modules
1206#
1207clean: rm-dirs := $(CLEAN_DIRS)
1208clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001209clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210
Paul Smith4f193362006-03-05 17:14:10 -05001211PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212$(clean-dirs):
1213 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1214
1215clean: archclean $(clean-dirs)
1216 $(call cmd,rmdirs)
1217 $(call cmd,rmfiles)
1218 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001219 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001220 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001221 -o -name '*.symtypes' -o -name 'modules.order' \
Alexey Dobriyan6b36ab22008-06-07 01:47:09 +04001222 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 -type f -print | xargs rm -f
1224
1225# mrproper - Delete all generated files, including .config
1226#
1227mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1228mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1229mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1230
Paul Smith4f193362006-03-05 17:14:10 -05001231PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232$(mrproper-dirs):
1233 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1234
1235mrproper: clean archmrproper $(mrproper-dirs)
1236 $(call cmd,rmdirs)
1237 $(call cmd,rmfiles)
1238
1239# distclean
1240#
Paul Smith4f193362006-03-05 17:14:10 -05001241PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
1243distclean: mrproper
1244 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001245 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001247 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1249 -type f -print | xargs rm -f
1250
1251
1252# Packaging of the kernel to various formats
1253# ---------------------------------------------------------------------------
1254# rpm target kept for backward compatibility
1255package-dir := $(srctree)/scripts/package
1256
Zach Brown031ecc62006-06-08 22:12:37 -07001257%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001258 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001259rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001260 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261
1262
1263# Brief documentation of the typical targets used
1264# ---------------------------------------------------------------------------
1265
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001266boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001268board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1269board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270
1271help:
1272 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001273 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001274 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001275 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001276 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 @echo ''
1278 @echo 'Configuration targets:'
1279 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1280 @echo ''
1281 @echo 'Other generic targets:'
1282 @echo ' all - Build all targets marked with [*]'
1283 @echo '* vmlinux - Build the bare kernel'
1284 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001285 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001286 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1287 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 @echo ' dir/ - Build all files in dir and below'
1289 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001290 @echo ' dir/file.ko - Build module including final link'
Valdis.Kletnieks@vt.edu243f40c2007-12-28 21:22:48 -05001291 @echo ' prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 @echo ' tags/TAGS - Generate tags file for editors'
1293 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001294 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001295 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001296 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001297 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001298 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 @echo ' checkstack - Generate a list of stack hogs'
1301 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001302 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001303 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001304 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001305 @echo ' headers_check - Sanity check on exported headers'
1306 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001307 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001309 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 @echo ''
1311 @echo 'Documentation targets:'
1312 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1313 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001314 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001316 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 @echo ''
1318 @$(if $(boards), \
1319 $(foreach b, $(boards), \
1320 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1321 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001322 @$(if $(board-dirs), \
1323 $(foreach b, $(board-dirs), \
1324 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1325 printf " %-16s - Show all of the above\\n" help-boards; \
1326 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327
1328 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001329 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001331 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1332 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 @echo ''
1334 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1335 @echo 'For further info see the ./README file'
1336
1337
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001338help-board-dirs := $(addprefix help-,$(board-dirs))
1339
1340help-boards: $(help-board-dirs)
1341
1342boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1343
1344$(help-board-dirs): help-%:
1345 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1346 @$(if $(boards-per-dir), \
1347 $(foreach b, $(boards-per-dir), \
1348 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1349 echo '')
1350
1351
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352# Documentation targets
1353# ---------------------------------------------------------------------------
1354%docs: scripts_basic FORCE
1355 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1356
1357else # KBUILD_EXTMOD
1358
1359###
1360# External module support.
1361# When building external modules the kernel used as basis is considered
1362# read-only, and no consistency checks are made and the make
1363# system is not used on the basis kernel. If updates are required
1364# in the basis kernel ordinary make commands (without M=...) must
1365# be used.
1366#
1367# The following are the only valid targets when building external
1368# modules.
1369# make M=dir clean Delete all automatically generated files
1370# make M=dir modules Make all modules in specified dir
1371# make M=dir Same as 'make M=dir modules'
1372# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001373# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374# Assumes install directory is already created
1375
1376# We are always building modules
1377KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001378PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001380 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381
Paul Smith4f193362006-03-05 17:14:10 -05001382PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383$(objtree)/Module.symvers:
1384 @test -e $(objtree)/Module.symvers || ( \
1385 echo; \
1386 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1387 echo " is missing; modules will have no dependencies and modversions."; \
1388 echo )
1389
1390module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001391PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392$(module-dirs): crmodverdir $(objtree)/Module.symvers
1393 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1394
1395modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001396 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001397 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398
Paul Smith4f193362006-03-05 17:14:10 -05001399PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001400modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001401
Paul Smith4f193362006-03-05 17:14:10 -05001402install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1403PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001404_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001405 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001406 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407
Paul Smith4f193362006-03-05 17:14:10 -05001408PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001409_emodinst_post: _emodinst_
1410 $(call cmd,depmod)
1411
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1413
Paul Smith4f193362006-03-05 17:14:10 -05001414PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415$(clean-dirs):
1416 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1417
1418clean: rm-dirs := $(MODVERDIR)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001419clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420clean: $(clean-dirs)
1421 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001422 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001424 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1426 -type f -print | xargs rm -f
1427
1428help:
1429 @echo ' Building external modules.'
1430 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1431 @echo ''
1432 @echo ' modules - default target, build the module(s)'
1433 @echo ' modules_install - install the module'
1434 @echo ' clean - remove generated files in module directory only'
1435 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001436
1437# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001438PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001439prepare: ;
1440scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441endif # KBUILD_EXTMOD
1442
1443# Generate tags for editors
1444# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001445quiet_cmd_tags = GEN $@
1446 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447
Sam Ravnborga680eed2008-12-03 22:24:13 +01001448tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 $(call cmd,tags)
1450
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451# Scripts to check various things for consistency
1452# ---------------------------------------------------------------------------
1453
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454includecheck:
1455 find * $(RCS_FIND_IGNORE) \
1456 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001457 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
1459versioncheck:
1460 find * $(RCS_FIND_IGNORE) \
1461 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001462 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464namespacecheck:
1465 $(PERL) $(srctree)/scripts/namespace.pl
1466
Adrian Bunk295ac052007-08-24 23:04:56 +02001467export_report:
1468 $(PERL) $(srctree)/scripts/export_report.pl
1469
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470endif #ifeq ($(config-targets),1)
1471endif #ifeq ($(mixed-targets),1)
1472
Roman Zippelc30a02e2006-06-08 22:12:50 -07001473PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001474
Jeff Dike011e3a92006-12-13 00:34:12 -08001475# UML needs a little special treatment here. It wants to use the host
1476# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1477# else wants $(ARCH), including people doing cross-builds, which means
1478# that $(SUBARCH) doesn't work here.
1479ifeq ($(ARCH), um)
1480CHECKSTACK_ARCH := $(SUBARCH)
1481else
1482CHECKSTACK_ARCH := $(ARCH)
1483endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484checkstack:
1485 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001486 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487
1488kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001489 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1490 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001491kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001492 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493
Sam Ravnborg06300b22006-01-25 07:13:18 +01001494# Single targets
1495# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001496# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001497# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001498# - build with separate output dir 'make O=...'
1499# - external modules
1500#
1501# target-dir => where to store outputfile
1502# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001503
Sam Ravnborg06300b22006-01-25 07:13:18 +01001504ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001505 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001506 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001507else
1508 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001509 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1510 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001511endif
1512
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001513%.s: %.c prepare scripts FORCE
1514 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1515%.i: %.c prepare scripts FORCE
1516 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1517%.o: %.c prepare scripts FORCE
1518 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1519%.lst: %.c prepare scripts FORCE
1520 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1521%.s: %.S prepare scripts FORCE
1522 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1523%.o: %.S prepare scripts FORCE
1524 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001525%.symtypes: %.c prepare scripts FORCE
1526 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001527
1528# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001529/: prepare scripts FORCE
1530 $(cmd_crmodverdir)
1531 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1532 $(build)=$(build-dir)
1533%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001534 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001535 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001536 $(build)=$(build-dir)
1537%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001538 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001539 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001540 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001541 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001542
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543# FIXME Should go into a make.lib or something
1544# ===========================================================================
1545
1546quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1547 cmd_rmdirs = rm -rf $(rm-dirs)
1548
1549quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1550 cmd_rmfiles = rm -f $(rm-files)
1551
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001552# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001553quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1554 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001555 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001556 $(DEPMOD) -ae -F System.map \
1557 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1558 $(KERNELRELEASE); \
1559 fi
1560
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001561# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001562# clean it up only when building all modules
1563cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1564 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
Sam Ravnborg222d3942007-10-15 21:59:31 +02001566a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001567 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001568 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569
1570quiet_cmd_as_o_S = AS $@
1571cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1572
1573# read all saved command lines
1574
1575targets := $(wildcard $(sort $(targets)))
1576cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1577
1578ifneq ($(cmd_files),)
1579 $(cmd_files): ; # Do not try to update included dependency files
1580 include $(cmd_files)
1581endif
1582
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1584# Usage:
1585# $(Q)$(MAKE) $(clean)=dir
1586clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1587
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588endif # skip-makefile
1589
Paul Smith4f193362006-03-05 17:14:10 -05001590PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001592
Paul Smith4f193362006-03-05 17:14:10 -05001593# Declare the contents of the .PHONY variable as phony. We keep that
1594# information in a variable se we can use it in if_changed and friends.
1595.PHONY: $(PHONY)