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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds55639352009-12-17 17:14:40 -08003SUBLEVEL = 33
4EXTRAVERSION = -rc1
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
H. Peter Anvinc0513462009-12-17 06:56:11 -080019# Avoid funny character set dependencies
H. Peter Anvin06b5dc62009-12-17 15:51:37 -080020unexport LC_ALL
H. Peter Anvinc0513462009-12-17 06:56:11 -080021LC_CTYPE=C
22LC_COLLATE=C
23LC_NUMERIC=C
H. Peter Anvin06b5dc62009-12-17 15:51:37 -080024export LC_CTYPE LC_COLLATE LC_NUMERIC
H. Peter Anvinc0513462009-12-17 06:56:11 -080025
Linus Torvalds1da177e2005-04-16 15:20:36 -070026# We are using a recursive build, so we need to do a little thinking
27# to get the ordering right.
28#
29# Most importantly: sub-Makefiles should only ever modify files in
30# their own directory. If in some directory we have a dependency on
31# a file in another dir (which doesn't happen often, but it's often
32# unavoidable when linking the built-in.o targets which finally
33# turn into vmlinux), we will call a sub make in that other dir, and
34# after that we are sure that everything which is in that other dir
35# is now up to date.
36#
37# The only cases where we need to modify files which have global
38# effects are thus separated out and done before the recursive
39# descending is started. They are now explicitly listed as the
40# prepare rule.
41
42# To put more focus on warnings, be less verbose as default
43# Use 'make V=1' to see the full commands
44
Cheng Renquanb8b06182009-05-26 16:03:07 +080045ifeq ("$(origin V)", "command line")
46 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047endif
48ifndef KBUILD_VERBOSE
49 KBUILD_VERBOSE = 0
50endif
51
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040052# Call a source code checker (by default, "sparse") as part of the
53# C compilation.
54#
55# Use 'make C=1' to enable checking of only re-compiled files.
56# Use 'make C=2' to enable checking of *all* source files, regardless
57# of whether they are re-compiled or not.
58#
59# See the file "Documentation/sparse.txt" for more details, including
60# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Cheng Renquanb8b06182009-05-26 16:03:07 +080062ifeq ("$(origin C)", "command line")
63 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070064endif
65ifndef KBUILD_CHECKSRC
66 KBUILD_CHECKSRC = 0
67endif
68
69# Use make M=dir to specify directory of external module to build
70# Old syntax make ... SUBDIRS=$PWD is still supported
71# Setting the environment variable KBUILD_EXTMOD take precedence
72ifdef SUBDIRS
73 KBUILD_EXTMOD ?= $(SUBDIRS)
74endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Cheng Renquanb8b06182009-05-26 16:03:07 +080076ifeq ("$(origin M)", "command line")
77 KBUILD_EXTMOD := $(M)
78endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80# kbuild supports saving output files in a separate directory.
81# To locate output files in a separate directory two syntaxes are supported.
82# In both cases the working directory must be the root of the kernel src.
83# 1) O=
84# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020085#
Linus Torvalds1da177e2005-04-16 15:20:36 -070086# 2) Set KBUILD_OUTPUT
87# Set the environment variable KBUILD_OUTPUT to point to the directory
88# where the output files shall be placed.
89# export KBUILD_OUTPUT=dir/to/store/output/files/
90# make
91#
92# The O= assignment takes precedence over the KBUILD_OUTPUT environment
93# variable.
94
95
96# KBUILD_SRC is set on invocation of make in OBJ directory
97# KBUILD_SRC is not intended to be used by the regular user (for now)
98ifeq ($(KBUILD_SRC),)
99
100# OK, Make called in directory where kernel src resides
101# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800102ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104endif
105
106# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500107PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108_all:
109
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100110# Cancel implicit rules on top Makefile
111$(CURDIR)/Makefile Makefile: ;
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113ifneq ($(KBUILD_OUTPUT),)
114# Invoke a second make in the output directory, passing relevant variables
115# check that the output directory actually exists
116saved-output := $(KBUILD_OUTPUT)
117KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
118$(if $(KBUILD_OUTPUT),, \
119 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Milton Miller0b357862007-09-21 18:09:02 -0500121PHONY += $(MAKECMDGOALS) sub-make
122
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100123$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500124 $(Q)@:
125
126sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200127 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
128 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500129 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
130 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
132# Leave processing to above invocation of make
133skip-makefile := 1
134endif # ifneq ($(KBUILD_OUTPUT),)
135endif # ifeq ($(KBUILD_SRC),)
136
137# We process the rest of the Makefile if this is the final invocation of make
138ifeq ($(skip-makefile),)
139
140# If building an external module we do not care about the all: rule
141# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500142PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143ifeq ($(KBUILD_EXTMOD),)
144_all: all
145else
146_all: modules
147endif
148
149srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150objtree := $(CURDIR)
151src := $(srctree)
152obj := $(objtree)
153
Mattia Dongili0f558c32006-02-19 13:50:37 +0100154VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Amerigo Wang11294232009-06-19 03:40:26 -0400156export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159# SUBARCH tells the usermode build what the underlying arch is. That is set
160# first, and if a usermode build is happening, the "ARCH=um" on the command
161# line overrides the setting of ARCH below. If a native build is happening,
162# then ARCH is assigned, getting whatever value it gets normally, and
163# SUBARCH is subsequently ignored.
164
165SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
166 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800167 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900168 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt3cc000b2009-04-11 08:39:27 +0900169 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171# Cross compiling and selecting different set of gcc/bin-utils
172# ---------------------------------------------------------------------------
173#
174# When performing cross compilation for other architectures ARCH shall be set
175# to the target architecture. (See arch/* for the possibilities).
176# ARCH can be set during invocation of make:
177# make ARCH=ia64
178# Another way is to have ARCH set in the environment.
179# The default ARCH is the host where make is executed.
180
181# CROSS_COMPILE specify the prefix used for all executables used
182# during compilation. Only gcc and related bin-utils executables
183# are prefixed with $(CROSS_COMPILE).
184# CROSS_COMPILE can be set on the command line
185# make CROSS_COMPILE=ia64-linux-
186# Alternatively CROSS_COMPILE can be set in the environment.
187# Default value for CROSS_COMPILE is not to prefix executables
188# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100189export KBUILD_BUILDHOST := $(SUBARCH)
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200190ARCH ?= $(SUBARCH)
191CROSS_COMPILE ?=
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200194UTS_MACHINE := $(ARCH)
195SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196
Sam Ravnborgd746d642007-11-12 20:14:19 +0100197# Additional ARCH settings for x86
198ifeq ($(ARCH),i386)
199 SRCARCH := x86
200endif
201ifeq ($(ARCH),x86_64)
202 SRCARCH := x86
203endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200204
Sam Ravnborg5e538792008-12-02 23:17:12 -0800205# Additional ARCH settings for sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200206ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800207 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200208endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200209
Paul Mundt3cc000b2009-04-11 08:39:27 +0900210# Additional ARCH settings for sh
211ifeq ($(ARCH),sh64)
212 SRCARCH := sh
213endif
214
Sam Ravnborg5e538792008-12-02 23:17:12 -0800215# Where to locate arch specific headers
216hdr-arch := $(SRCARCH)
217
Sam Ravnborg49148022009-01-16 21:58:10 +1000218ifeq ($(ARCH),m68knommu)
219 hdr-arch := m68k
220endif
221
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700222KCONFIG_CONFIG ?= .config
223
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224# SHELL used by kbuild
225CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
226 else if [ -x /bin/bash ]; then echo /bin/bash; \
227 else echo sh; fi ; fi)
228
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200229HOSTCC = gcc
230HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800231HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200232HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200234# Decide whether to build built-in, modular, or both.
235# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
237KBUILD_MODULES :=
238KBUILD_BUILTIN := 1
239
240# If we have only "make modules", don't compile built-in objects.
241# When we're building modules with modversions, we need to consider
242# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200243# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
245ifeq ($(MAKECMDGOALS),modules)
246 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
247endif
248
249# If we have "make <whatever> modules", compile modules
250# in addition to whatever we do anyway.
251# Just "make" or "make all" shall build modules as well
252
253ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
254 KBUILD_MODULES := 1
255endif
256
257ifeq ($(MAKECMDGOALS),)
258 KBUILD_MODULES := 1
259endif
260
Sam Ravnborge579d352005-07-27 08:10:10 +0200261export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
263
264# Beautify output
265# ---------------------------------------------------------------------------
266#
267# Normally, we echo the whole command before executing it. By making
268# that echo $($(quiet)$(cmd)), we now have the possibility to set
269# $(quiet) to choose other forms of output instead, e.g.
270#
271# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
272# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
273#
274# If $(quiet) is empty, the whole command will be printed.
275# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200276# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277# the variable $(silent_cmd_cc_o_c) doesn't exist.
278#
Adrian Bunka58a4142006-01-10 00:08:17 +0100279# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280# for commands that shall be hidden in non-verbose mode.
281#
282# $(Q)ln $@ :<
283#
284# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
285# If KBUILD_VERBOSE equals 1 then the above command is displayed.
286
287ifeq ($(KBUILD_VERBOSE),1)
288 quiet =
289 Q =
290else
291 quiet=quiet_
292 Q = @
293endif
294
295# If the user is running make -s (silent mode), suppress echoing of
296# commands
297
298ifneq ($(findstring s,$(MAKEFLAGS)),)
299 quiet=silent_
300endif
301
302export quiet Q KBUILD_VERBOSE
303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
305# Look for make include files relative to root of kernel src
306MAKEFLAGS += --include-dir=$(srctree)
307
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100308# We need some generic definitions (do not try to remake the file).
309$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800310include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312# Make variables (CC, etc...)
313
314AS = $(CROSS_COMPILE)as
315LD = $(CROSS_COMPILE)ld
316CC = $(CROSS_COMPILE)gcc
317CPP = $(CC) -E
318AR = $(CROSS_COMPILE)ar
319NM = $(CROSS_COMPILE)nm
320STRIP = $(CROSS_COMPILE)strip
321OBJCOPY = $(CROSS_COMPILE)objcopy
322OBJDUMP = $(CROSS_COMPILE)objdump
323AWK = awk
324GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200325INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326DEPMOD = /sbin/depmod
327KALLSYMS = scripts/kallsyms
328PERL = perl
329CHECK = sparse
330
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100331CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
332 -Wbitwise -Wno-return-void $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333MODFLAGS = -DMODULE
334CFLAGS_MODULE = $(MODFLAGS)
335AFLAGS_MODULE = $(MODFLAGS)
Tejun Heo405d9672009-06-24 15:13:38 +0900336LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337CFLAGS_KERNEL =
338AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700339CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
341
342# Use LINUXINCLUDE when you must reference the include/ directory.
343# Needed to be compatible with the O= option
Sam Ravnborg24a675e2009-10-17 21:14:18 +0200344LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
Sam Ravnborg96f13042009-10-17 22:33:27 +0200345 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200346 -include include/generated/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100348KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200350KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700351 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300352 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800353 -Wno-format-security \
354 -fno-delete-null-pointer-checks
Sam Ravnborg222d3942007-10-15 21:59:31 +0200355KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700357# Read KERNELRELEASE from include/config/kernel.release (if it exists)
358KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100359KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100360
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200361export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100362export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200363export CPP AR NM STRIP OBJCOPY OBJDUMP
364export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200365export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
Sam Ravnborg06c50402007-10-15 22:17:25 +0200367export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700368export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200369export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
371# When compiling out-of-tree modules, put MODVERDIR in the module
372# tree rather than in the kernel tree. The kernel tree might
373# even be read-only.
374export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
375
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376# Files to ignore in find ... statements
377
Trond Myklebust406119f2005-10-27 14:46:53 -0400378RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
379export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
381# ===========================================================================
382# Rules shared between *config targets and build targets
383
384# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500385PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386scripts_basic:
387 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500388 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200390# To avoid any implicit rule to kick in, define an empty command.
391scripts/basic/%: scripts_basic ;
392
Paul Smith4f193362006-03-05 17:14:10 -0500393PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200394# outputmakefile generates a Makefile in the output directory, if using a
395# separate output directory. This allows convenient use of make in the
396# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200398ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100399 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200400 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
401 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
402endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
404# To make sure we do not include .config for any of the *config targets
405# catch them early, and hand them over to scripts/kconfig/Makefile
406# It is allowed to specify more targets when calling make, including
407# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200408# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409# Detect when mixed targets is specified, and make a second invocation
410# of make so .config is not included in this case either (for *config).
411
Roman Zippel3eb3c742007-01-10 14:45:28 +0100412no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700413 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100414 include/linux/version.h headers_% \
415 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
417config-targets := 0
418mixed-targets := 0
419dot-config := 1
420
421ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
422 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
423 dot-config := 0
424 endif
425endif
426
427ifeq ($(KBUILD_EXTMOD),)
428 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
429 config-targets := 1
430 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
431 mixed-targets := 1
432 endif
433 endif
434endif
435
436ifeq ($(mixed-targets),1)
437# ===========================================================================
438# We're called with mixed targets (*config and build targets).
439# Handle them one by one.
440
441%:: FORCE
442 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
443
444else
445ifeq ($(config-targets),1)
446# ===========================================================================
447# *config targets only - make sure prerequisites are updated, and descend
448# in scripts/kconfig to make the *config target
449
450# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
451# KBUILD_DEFCONFIG may point out an alternative default configuration
452# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200453include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400454export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100456config: scripts_basic outputmakefile FORCE
457 $(Q)mkdir -p include/linux include/config
458 $(Q)$(MAKE) $(build)=scripts/kconfig $@
459
460%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700461 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 $(Q)$(MAKE) $(build)=scripts/kconfig $@
463
464else
465# ===========================================================================
466# Build targets only - this includes vmlinux, arch specific targets, clean
467# targets and others. In general all targets except *config targets.
468
469ifeq ($(KBUILD_EXTMOD),)
470# Additional helpers built in scripts/
471# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200472# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500473PHONY += scripts
Michal Marekbc081dd2009-12-07 16:38:33 +0100474scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 $(Q)$(MAKE) $(build)=$(@)
476
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477# Objects we will link into vmlinux / subdirs we need to visit
478init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100479drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480net-y := net/
481libs-y := lib/
482core-y := usr/
483endif # KBUILD_EXTMOD
484
485ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200486# Read in config
487-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200489ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490# Read in dependencies to all Kconfig* files, make sure to run
491# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700492-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700495$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
Roman Zippelc955cca2006-06-08 22:12:39 -0700497# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100498# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200499# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100500# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100501include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
503else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200504# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200505# but do not care if they are up-to-date. Use auto.conf to trigger the test
506PHONY += include/config/auto.conf
507
508include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200509 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200510 echo; \
511 echo " ERROR: Kernel configuration is invalid."; \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200512 echo " include/generated/autoconf.h or $@ are missing.";\
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200513 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
514 echo; \
515 /bin/false)
516
517endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700518
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519else
520# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700521include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200522endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
524# The all: target is the default when no target is given on the
525# command line.
526# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200527# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528all: vmlinux
529
530ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200531KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200533KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534endif
535
Ralf Baechlebef5b542008-07-16 13:02:24 +0100536include $(srctree)/arch/$(SRCARCH)/Makefile
537
Mike Frysinger08f67462009-06-04 16:29:08 -0700538ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100539KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
540endif
541
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100542# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900543ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100544KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900545endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200548KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200550KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551endif
552
553ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200554KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200555KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556endif
557
Steven Rostedt606576c2008-10-06 19:06:12 -0400558ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200559KBUILD_CFLAGS += -pg
560endif
561
Sam Ravnborg91341d42008-01-21 21:31:44 +0100562# We trigger additional mismatches with less inlining
563ifdef CONFIG_DEBUG_SECTION_MISMATCH
564KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
565endif
566
Sam Ravnborge8e69932005-04-30 16:51:42 -0700567# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700568NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700569CHECKFLAGS += $(NOSTDINC_FLAGS)
570
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200572KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200574# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200575KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400577# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700578KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700579
Kyle McMartin00308642009-03-23 15:25:49 -0400580# revert to pre-gcc-4.4 behaviour of .eh_frame
581KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
582
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700583# conserve stack if available
584KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
585
Sam Ravnborg06c50402007-10-15 22:17:25 +0200586# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100587# But warn user when we do so
588warn-assign = \
589$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
590
591ifneq ($(KCPPFLAGS),)
592 $(call warn-assign,CPPFLAGS)
593 KBUILD_CPPFLAGS += $(KCPPFLAGS)
594endif
595ifneq ($(KAFLAGS),)
596 $(call warn-assign,AFLAGS)
597 KBUILD_AFLAGS += $(KAFLAGS)
598endif
599ifneq ($(KCFLAGS),)
600 $(call warn-assign,CFLAGS)
601 KBUILD_CFLAGS += $(KCFLAGS)
602endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200603
Roland McGrath18991192007-07-19 01:48:40 -0700604# Use --build-id when available.
605LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200606 $(call cc-ldoption, -Wl$(comma)--build-id,))
Roland McGrath18991192007-07-19 01:48:40 -0700607LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
608LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
609
David Howells5d7d18f2009-03-04 11:59:07 -0800610ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200611LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800612endif
613
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200615# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616# set in the environment
617# Also any assignments in arch/$(ARCH)/Makefile take precedence over
618# this default value
619export KBUILD_IMAGE ?= vmlinux
620
621#
622# INSTALL_PATH specifies where to place the updated kernel and system map
623# images. Default is /boot, but you can set it to other values
624export INSTALL_PATH ?= /boot
625
626#
627# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
628# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200629# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630#
631
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100632MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633export MODLIB
634
Theodore Ts'oac031f22006-06-21 20:53:09 -0400635#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100636# INSTALL_MOD_STRIP, if defined, will cause modules to be
637# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
638# the default option --strip-debug will be used. Otherwise,
639# INSTALL_MOD_STRIP will used as the options to the strip command.
640
Theodore Ts'oac031f22006-06-21 20:53:09 -0400641ifdef INSTALL_MOD_STRIP
642ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100643mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400644else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100645mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400646endif # INSTALL_MOD_STRIP=1
647else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100648mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400649endif # INSTALL_MOD_STRIP
650export mod_strip_cmd
651
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
653ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100654core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655
656vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
657 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
658 $(net-y) $(net-m) $(libs-y) $(libs-m)))
659
660vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
661 $(init-n) $(init-) \
662 $(core-n) $(core-) $(drivers-n) $(drivers-) \
663 $(net-n) $(net-) $(libs-n) $(libs-))))
664
665init-y := $(patsubst %/, %/built-in.o, $(init-y))
666core-y := $(patsubst %/, %/built-in.o, $(core-y))
667drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
668net-y := $(patsubst %/, %/built-in.o, $(net-y))
669libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
670libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
671libs-y := $(libs-y1) $(libs-y2)
672
673# Build vmlinux
674# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200675# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200677# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678# Ordering when linking is important, and $(vmlinux-init) must be first.
679#
680# vmlinux
681# ^
682# |
683# +-< $(vmlinux-init)
684# | +--< init/version.o + more
685# |
686# +--< $(vmlinux-main)
687# | +--< driver/built-in.o mm/built-in.o + more
688# |
689# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
690#
691# vmlinux version (uname -v) cannot be updated during normal
692# descending-into-subdirs phase since we do not yet know if we need to
693# update vmlinux.
694# Therefore this step is delayed until just before final link of vmlinux -
695# except in the kallsyms case where it is done just before adding the
696# symbols to the kernel.
697#
698# System.map is generated to document addresses of all kernel symbols
699
700vmlinux-init := $(head-y) $(init-y)
701vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
702vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200703vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100704export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705
706# Rule to link vmlinux - also used during CONFIG_KALLSYMS
707# May be overridden by arch/$(ARCH)/Makefile
708quiet_cmd_vmlinux__ ?= LD $@
709 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
710 -T $(vmlinux-lds) $(vmlinux-init) \
711 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200712 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
714# Generate new vmlinux version
715quiet_cmd_vmlinux_version = GEN .version
716 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200717 if [ ! -r .version ]; then \
718 rm -f .version; \
719 echo 1 >.version; \
720 else \
721 mv .version .old_version; \
722 expr 0$$(cat .old_version) + 1 >.version; \
723 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 $(MAKE) $(build)=init
725
726# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200727quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
729
730# Link of vmlinux
731# If CONFIG_KALLSYMS is set .version is already updated
732# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700733# Use + in front of the vmlinux_version rule to silent warning with make -j2
734# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700736 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
738
739 $(call cmd,vmlinux__)
740 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
741
Sam Ravnborg46352812006-08-08 21:41:18 +0200742 $(Q)$(if $($(quiet)cmd_sysmap), \
743 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
744 $(cmd_sysmap) $@ System.map; \
745 if [ $$? -ne 0 ]; then \
746 rm -f $@; \
747 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 fi;
749 $(verify_kallsyms)
750endef
751
752
753ifdef CONFIG_KALLSYMS
754# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
755# It's a three stage process:
756# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
757# empty
758# Running kallsyms on that gives us .tmp_kallsyms1.o with
759# the right size - vmlinux version (uname -v) is updated during this step
760# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
761# but due to the added section, some addresses have shifted.
762# From here, we generate a correct .tmp_kallsyms2.o
763# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
764# o Verify that the System.map from vmlinux matches the map from
765# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
766# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
767# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
768# temporary bypass to allow the kernel to be built while the
769# maintainers work out what went wrong with kallsyms.
770
771ifdef CONFIG_KALLSYMS_EXTRA_PASS
772last_kallsyms := 3
773else
774last_kallsyms := 2
775endif
776
777kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
778
779define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200780 $(Q)$(if $($(quiet)cmd_sysmap), \
781 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200783 $(Q)cmp -s System.map .tmp_System.map || \
784 (echo Inconsistent kallsyms data; \
785 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 rm .tmp_kallsyms* ; /bin/false )
787endef
788
789# Update vmlinux version before link
790# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200791# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792cmd_ksym_ld = $(cmd_vmlinux__)
793define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200794 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 +$(call cmd,vmlinux_version)
796 $(call cmd,vmlinux__)
797 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
798endef
799
800# Generate .S file with all kernel symbols
801quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100802 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
803 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100805.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 $(call if_changed_dep,as_o_S)
807
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100808.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 $(call cmd,kallsyms)
810
811# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100812.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
813 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100815.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
816 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100818.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
819 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821# Needs to visit scripts/ before $(KALLSYMS) can be used.
822$(KALLSYMS): scripts ;
823
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000824# Generate some data for debugging strange kallsyms problems
825debug_kallsyms: .tmp_map$(last_kallsyms)
826
827.tmp_map%: .tmp_vmlinux% FORCE
828 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
829
830.tmp_map3: .tmp_map2
831
832.tmp_map2: .tmp_map1
833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834endif # ifdef CONFIG_KALLSYMS
835
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200836# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
837# relevant sections renamed as per the linker script.
838quiet_cmd_vmlinux-modpost = LD $@
839 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
840 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200841 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200842define rule_vmlinux-modpost
843 :
844 +$(call cmd,vmlinux-modpost)
845 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
846 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
847endef
848
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100850vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700851ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100852 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700853endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700854ifdef CONFIG_SAMPLES
855 $(Q)$(MAKE) $(build)=samples
856endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700857ifdef CONFIG_BUILD_DOCSRC
858 $(Q)$(MAKE) $(build)=Documentation
859endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200860 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200862 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
Sam Ravnborg310f8242008-01-21 22:57:09 +0100864# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100865ifdef CONFIG_KALLSYMS
866.tmp_vmlinux1: vmlinux.o
867endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200868
869modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
870vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200871 $(call if_changed_rule,vmlinux-modpost)
872
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873# The actual objects are generated when descending,
874# make sure no implicit rule kicks in
875$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
876
877# Handle descending into subdirectories listed in $(vmlinux-dirs)
878# Preset locale variables to speed up the build process. Limit locale
879# tweaks to this spot to avoid wrong language settings when running
880# make menuconfig etc.
881# Error messages still appears in the original language
882
Paul Smith4f193362006-03-05 17:14:10 -0500883PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200884$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 $(Q)$(MAKE) $(build)=$@
Michal Marekbc081dd2009-12-07 16:38:33 +0100886ifdef CONFIG_MODULES
887 $(Q)$(MAKE) $(modbuiltin)=$@
888endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889
Sam Ravnborgcb584552006-01-09 21:20:34 +0100890# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100891#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400892# The KERNELRELEASE value built here is stored in the file
893# include/config/kernel.release, and is used when executing several
894# make targets, such as "make install" or "make modules_install."
895#
896# The eventual kernel release string consists of the following fields,
897# shown in a hierarchical format to show how smaller parts are concatenated
898# to form the larger and final value, with values coming from places like
899# the Makefile, kernel config options, make command line options and/or
900# SCM tag information.
901#
902# $(KERNELVERSION)
903# $(VERSION) eg, 2
904# $(PATCHLEVEL) eg, 6
905# $(SUBLEVEL) eg, 18
906# $(EXTRAVERSION) eg, -rc6
907# $(localver-full)
908# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100909# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400910# $(CONFIG_LOCALVERSION) (from kernel config setting)
911# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
912# ./scripts/setlocalversion (SCM tag, if one exists)
913# $(LOCALVERSION) (from make command line if provided)
914#
915# Note how the final $(localver-auto) string is included *only* if the
916# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
917# moment, only git is supported but other SCMs can edit the script
918# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100919
Oleg Verych76c32952007-02-06 02:18:22 +0100920pattern = ".*/localversion[^~]*"
921string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800922 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100923
Oleg Verych76c32952007-02-06 02:18:22 +0100924localver = $(subst $(space),, $(string) \
925 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200926
Sam Ravnborgcb584552006-01-09 21:20:34 +0100927# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
928# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200929# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100930#
Josh Huntb925dbf2009-02-12 10:16:05 -0800931# .scmversion is used when generating rpm packages so we do not loose
932# the version information from the SCM when we do the build of the kernel
933# from the copied source
Sam Ravnborgcb584552006-01-09 21:20:34 +0100934ifdef CONFIG_LOCALVERSION_AUTO
Josh Huntb925dbf2009-02-12 10:16:05 -0800935
936ifeq ($(wildcard .scmversion),)
937 _localver-auto = $(shell $(CONFIG_SHELL) \
938 $(srctree)/scripts/setlocalversion $(srctree))
939else
940 _localver-auto = $(shell cat .scmversion 2> /dev/null)
941endif
942
Sam Ravnborgcb584552006-01-09 21:20:34 +0100943 localver-auto = $(LOCALVERSION)$(_localver-auto)
944endif
945
946localver-full = $(localver)$(localver-auto)
947
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700948# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100949kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700950include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100951 $(Q)rm -f $@
952 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100953
954
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200956# or the modules are listed in "prepare".
957# A multi level approach is used. prepareN is processed before prepareN-1.
958# archprepare is used in arch Makefiles and when processed asm symlink,
959# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200961# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500962PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200963
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200964# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965# and if so do:
966# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700967prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500969 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700970 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 echo " $(srctree) is not clean, please run 'make mrproper'";\
972 echo " in the '$(srctree)' directory.";\
973 /bin/false; \
974 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975endif
976
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200977# prepare2 creates a makefile if using a separate output directory
978prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979
Sam Ravnborg273b2812009-10-18 00:52:28 +0200980prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200981 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200982 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200984archprepare: prepare1 scripts_basic
985
986prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200987 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200988 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200989
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800991prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993# Generate some files
994# ---------------------------------------------------------------------------
995
996# KERNELRELEASE can change from a few different places, meaning version.h
997# needs to be updated, so this check is forced on all builds
998
999uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001000define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001002 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1003 exit 1; \
1004 fi; \
1005 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006endef
1007
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001008define filechk_version.h
1009 (echo \#define LINUX_VERSION_CODE $(shell \
1010 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1011 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1012endef
1013
1014include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 $(call filechk,version.h)
1016
Sam Ravnborg273b2812009-10-18 00:52:28 +02001017include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001018 $(call filechk,utsrelease.h)
1019
Vegard Nossum179efcb2008-12-16 12:33:43 +01001020PHONY += headerdep
1021headerdep:
1022 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1023
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024# ---------------------------------------------------------------------------
1025
Paul Smith4f193362006-03-05 17:14:10 -05001026PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027depend dep:
1028 @echo '*** Warning: make $@ is unnecessary now.'
1029
1030# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001031# Firmware install
1032INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1033export INSTALL_FW_PATH
1034
1035PHONY += firmware_install
1036firmware_install: FORCE
1037 @mkdir -p $(objtree)/firmware
1038 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1039
1040# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001041# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001042
Sam Ravnborge6883b12008-06-05 16:43:46 +02001043#Default location for installed headers
1044export INSTALL_HDR_PATH = $(objtree)/usr
1045
Sam Ravnborge6883b12008-06-05 16:43:46 +02001046hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001047
1048# If we do an all arch process set dst to asm-$(hdr-arch)
1049hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001050
1051PHONY += __headers
1052__headers: include/linux/version.h scripts_basic FORCE
1053 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001054
1055PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001056headers_install_all:
1057 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001058
David Woodhouse8d730cf2006-06-18 11:58:39 +01001059PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001060headers_install: __headers
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001061 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001062 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001063 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001064 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001065
Mike Frysinger1f857122007-02-14 00:33:02 -08001066PHONY += headers_check_all
1067headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001068 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001069
David Woodhouse68475352006-06-18 12:02:10 +01001070PHONY += headers_check
1071headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001072 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001073 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001074
David Woodhouse8d730cf2006-06-18 11:58:39 +01001075# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076# Modules
1077
1078ifdef CONFIG_MODULES
1079
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001080# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081
1082all: modules
1083
1084# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001085#
1086# A module can be listed more than once in obj-m resulting in
1087# duplicate lines in modules.order files. Those are removed
1088# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089
Paul Smith4f193362006-03-05 17:14:10 -05001090PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001092 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Michal Marekbc081dd2009-12-07 16:38:33 +01001093 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.builtin) > $(objtree)/modules.builtin
Mike Frysingerfd54f502008-11-06 03:31:35 -05001094 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001095 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001096 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097
1098
1099# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001100PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001101modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102
1103# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001104PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105modules_install: _modinst_ _modinst_post
1106
Paul Smith4f193362006-03-05 17:14:10 -05001107PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001109 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 echo "Warning: you may need to install module-init-tools"; \
1111 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1112 sleep 1; \
1113 fi
1114 @rm -rf $(MODLIB)/kernel
1115 @rm -f $(MODLIB)/source
1116 @mkdir -p $(MODLIB)/kernel
1117 @ln -s $(srctree) $(MODLIB)/source
1118 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1119 rm -f $(MODLIB)/build ; \
1120 ln -s $(objtree) $(MODLIB)/build ; \
1121 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001122 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001123 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001124 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001126# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127# boot a modules.dep even before / is mounted read-write. However the
1128# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001129PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001132 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
1134else # CONFIG_MODULES
1135
1136# Modules not configured
1137# ---------------------------------------------------------------------------
1138
1139modules modules_install: FORCE
1140 @echo
1141 @echo "The present kernel configuration has modules disabled."
1142 @echo "Type 'make config' and enable loadable module support."
1143 @echo "Then build a kernel with module support enabled."
1144 @echo
1145 @exit 1
1146
1147endif # CONFIG_MODULES
1148
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149###
1150# Cleaning is done on three levels.
1151# make clean Delete most generated files
1152# Leave enough to build external modules
1153# make mrproper Delete the current configuration, and all generated files
1154# make distclean Remove editor backup files, patch leftover files and the like
1155
1156# Directories & files removed with 'make clean'
1157CLEAN_DIRS += $(MODVERDIR)
1158CLEAN_FILES += vmlinux System.map \
1159 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1160
1161# Directories & files removed with 'make mrproper'
Sam Ravnborg96f13042009-10-17 22:33:27 +02001162MRPROPER_DIRS += include/config usr/include include/generated
Sam Ravnborgf7f16b72009-10-18 00:00:43 +02001163MRPROPER_FILES += .config .config.old .version .old_version \
Sam Ravnborg264a2682009-10-18 00:49:24 +02001164 include/linux/version.h \
Wenji Huang8723eae2009-11-19 08:44:32 +08001165 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
1167# clean - Delete most, but leave enough to build external modules
1168#
1169clean: rm-dirs := $(CLEAN_DIRS)
1170clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001171clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
Paul Smith4f193362006-03-05 17:14:10 -05001173PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174$(clean-dirs):
1175 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1176
1177clean: archclean $(clean-dirs)
1178 $(call cmd,rmdirs)
1179 $(call cmd,rmfiles)
1180 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001181 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001182 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001183 -o -name '*.symtypes' -o -name 'modules.order' \
Michal Marekd9bdcc72009-12-08 16:03:10 +01001184 -o -name modules.builtin -o -name '.tmp_*.o.*' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001185 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
1187# mrproper - Delete all generated files, including .config
1188#
1189mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1190mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1191mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1192
Paul Smith4f193362006-03-05 17:14:10 -05001193PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194$(mrproper-dirs):
1195 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1196
1197mrproper: clean archmrproper $(mrproper-dirs)
1198 $(call cmd,rmdirs)
1199 $(call cmd,rmfiles)
1200
1201# distclean
1202#
Paul Smith4f193362006-03-05 17:14:10 -05001203PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
1205distclean: mrproper
1206 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001207 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001209 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1211 -type f -print | xargs rm -f
1212
1213
1214# Packaging of the kernel to various formats
1215# ---------------------------------------------------------------------------
1216# rpm target kept for backward compatibility
1217package-dir := $(srctree)/scripts/package
1218
Zach Brown031ecc62006-06-08 22:12:37 -07001219%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001220 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001221rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001222 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
1224
1225# Brief documentation of the typical targets used
1226# ---------------------------------------------------------------------------
1227
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001228boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001230board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1231board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232
1233help:
1234 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001235 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001236 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001237 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001238 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 @echo ''
1240 @echo 'Configuration targets:'
1241 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1242 @echo ''
1243 @echo 'Other generic targets:'
1244 @echo ' all - Build all targets marked with [*]'
1245 @echo '* vmlinux - Build the bare kernel'
1246 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001247 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001248 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1249 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 @echo ' dir/ - Build all files in dir and below'
1251 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001252 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001253 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 @echo ' tags/TAGS - Generate tags file for editors'
1255 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001256 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001257 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001258 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001259 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001260 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 @echo ' checkstack - Generate a list of stack hogs'
1263 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001264 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001265 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001266 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001267 @echo ' headers_check - Sanity check on exported headers'
1268 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001269 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001271 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 @echo ''
1273 @echo 'Documentation targets:'
1274 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1275 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001276 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001278 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 @echo ''
1280 @$(if $(boards), \
1281 $(foreach b, $(boards), \
1282 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1283 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001284 @$(if $(board-dirs), \
1285 $(foreach b, $(board-dirs), \
1286 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1287 printf " %-16s - Show all of the above\\n" help-boards; \
1288 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289
1290 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001291 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001293 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1294 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 @echo ''
1296 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1297 @echo 'For further info see the ./README file'
1298
1299
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001300help-board-dirs := $(addprefix help-,$(board-dirs))
1301
1302help-boards: $(help-board-dirs)
1303
1304boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1305
1306$(help-board-dirs): help-%:
1307 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1308 @$(if $(boards-per-dir), \
1309 $(foreach b, $(boards-per-dir), \
1310 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1311 echo '')
1312
1313
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314# Documentation targets
1315# ---------------------------------------------------------------------------
1316%docs: scripts_basic FORCE
1317 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1318
1319else # KBUILD_EXTMOD
1320
1321###
1322# External module support.
1323# When building external modules the kernel used as basis is considered
1324# read-only, and no consistency checks are made and the make
1325# system is not used on the basis kernel. If updates are required
1326# in the basis kernel ordinary make commands (without M=...) must
1327# be used.
1328#
1329# The following are the only valid targets when building external
1330# modules.
1331# make M=dir clean Delete all automatically generated files
1332# make M=dir modules Make all modules in specified dir
1333# make M=dir Same as 'make M=dir modules'
1334# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001335# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336# Assumes install directory is already created
1337
1338# We are always building modules
1339KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001340PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001342 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343
Paul Smith4f193362006-03-05 17:14:10 -05001344PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345$(objtree)/Module.symvers:
1346 @test -e $(objtree)/Module.symvers || ( \
1347 echo; \
1348 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1349 echo " is missing; modules will have no dependencies and modversions."; \
1350 echo )
1351
1352module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001353PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354$(module-dirs): crmodverdir $(objtree)/Module.symvers
1355 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1356
1357modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001358 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001359 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
Paul Smith4f193362006-03-05 17:14:10 -05001361PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001362modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001363
Paul Smith4f193362006-03-05 17:14:10 -05001364install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1365PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001366_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001367 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001368 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369
Paul Smith4f193362006-03-05 17:14:10 -05001370PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001371_emodinst_post: _emodinst_
1372 $(call cmd,depmod)
1373
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1375
Paul Smith4f193362006-03-05 17:14:10 -05001376PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377$(clean-dirs):
1378 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1379
1380clean: rm-dirs := $(MODVERDIR)
Frédéric Brière0c560422009-04-19 12:58:40 -04001381clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
Michal Marekbc081dd2009-12-07 16:38:33 +01001382 $(KBUILD_EXTMOD)/modules.order \
1383 $(KBUILD_EXTMOD)/modules.builtin
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384clean: $(clean-dirs)
1385 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001386 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001388 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001389 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1390 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391
1392help:
1393 @echo ' Building external modules.'
1394 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1395 @echo ''
1396 @echo ' modules - default target, build the module(s)'
1397 @echo ' modules_install - install the module'
1398 @echo ' clean - remove generated files in module directory only'
1399 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001400
1401# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001402PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001403prepare: ;
1404scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405endif # KBUILD_EXTMOD
1406
1407# Generate tags for editors
1408# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001409quiet_cmd_tags = GEN $@
1410 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411
Sam Ravnborga680eed2008-12-03 22:24:13 +01001412tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 $(call cmd,tags)
1414
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415# Scripts to check various things for consistency
1416# ---------------------------------------------------------------------------
1417
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418includecheck:
1419 find * $(RCS_FIND_IGNORE) \
1420 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001421 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422
1423versioncheck:
1424 find * $(RCS_FIND_IGNORE) \
1425 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001426 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428namespacecheck:
1429 $(PERL) $(srctree)/scripts/namespace.pl
1430
Adrian Bunk295ac052007-08-24 23:04:56 +02001431export_report:
1432 $(PERL) $(srctree)/scripts/export_report.pl
1433
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434endif #ifeq ($(config-targets),1)
1435endif #ifeq ($(mixed-targets),1)
1436
Roman Zippelc30a02e2006-06-08 22:12:50 -07001437PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001438
Jeff Dike011e3a92006-12-13 00:34:12 -08001439# UML needs a little special treatment here. It wants to use the host
1440# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1441# else wants $(ARCH), including people doing cross-builds, which means
1442# that $(SUBARCH) doesn't work here.
1443ifeq ($(ARCH), um)
1444CHECKSTACK_ARCH := $(SUBARCH)
1445else
1446CHECKSTACK_ARCH := $(ARCH)
1447endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448checkstack:
1449 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001450 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451
1452kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001453 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1454 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001455kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001456 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457
Sam Ravnborg06300b22006-01-25 07:13:18 +01001458# Single targets
1459# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001460# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001461# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001462# - build with separate output dir 'make O=...'
1463# - external modules
1464#
1465# target-dir => where to store outputfile
1466# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001467
Sam Ravnborg06300b22006-01-25 07:13:18 +01001468ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001469 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001470 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001471else
1472 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001473 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1474 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001475endif
1476
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001477%.s: %.c prepare scripts FORCE
1478 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1479%.i: %.c prepare scripts FORCE
1480 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1481%.o: %.c prepare scripts FORCE
1482 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1483%.lst: %.c prepare scripts FORCE
1484 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1485%.s: %.S prepare scripts FORCE
1486 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1487%.o: %.S prepare scripts FORCE
1488 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001489%.symtypes: %.c prepare scripts FORCE
1490 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001491
1492# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001493/: prepare scripts FORCE
1494 $(cmd_crmodverdir)
1495 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1496 $(build)=$(build-dir)
1497%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001498 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001499 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001500 $(build)=$(build-dir)
1501%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001502 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001503 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001504 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001505 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001506
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507# FIXME Should go into a make.lib or something
1508# ===========================================================================
1509
1510quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1511 cmd_rmdirs = rm -rf $(rm-dirs)
1512
1513quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1514 cmd_rmfiles = rm -f $(rm-files)
1515
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001516# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001517quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1518 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001519 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001520 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001521 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001522 $(KERNELRELEASE); \
1523 fi
1524
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001525# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001526# clean it up only when building all modules
1527cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1528 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529
Sam Ravnborg222d3942007-10-15 21:59:31 +02001530a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001531 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001532 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533
1534quiet_cmd_as_o_S = AS $@
1535cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1536
1537# read all saved command lines
1538
1539targets := $(wildcard $(sort $(targets)))
1540cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1541
1542ifneq ($(cmd_files),)
1543 $(cmd_files): ; # Do not try to update included dependency files
1544 include $(cmd_files)
1545endif
1546
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1548# Usage:
1549# $(Q)$(MAKE) $(clean)=dir
1550clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1551
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552endif # skip-makefile
1553
Paul Smith4f193362006-03-05 17:14:10 -05001554PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001556
Paul Smith4f193362006-03-05 17:14:10 -05001557# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001558# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001559.PHONY: $(PHONY)