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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds55639352009-12-17 17:14:40 -08003SUBLEVEL = 33
Linus Torvaldsabe94c72010-01-29 13:57:50 -08004EXTRAVERSION = -rc6
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_COLLATE=C
22LC_NUMERIC=C
Michal Marek07105202010-01-08 12:25:37 +010023export LC_COLLATE LC_NUMERIC
H. Peter Anvinc0513462009-12-17 06:56:11 -080024
Linus Torvalds1da177e2005-04-16 15:20:36 -070025# We are using a recursive build, so we need to do a little thinking
26# to get the ordering right.
27#
28# Most importantly: sub-Makefiles should only ever modify files in
29# their own directory. If in some directory we have a dependency on
30# a file in another dir (which doesn't happen often, but it's often
31# unavoidable when linking the built-in.o targets which finally
32# turn into vmlinux), we will call a sub make in that other dir, and
33# after that we are sure that everything which is in that other dir
34# is now up to date.
35#
36# The only cases where we need to modify files which have global
37# effects are thus separated out and done before the recursive
38# descending is started. They are now explicitly listed as the
39# prepare rule.
40
41# To put more focus on warnings, be less verbose as default
42# Use 'make V=1' to see the full commands
43
Cheng Renquanb8b06182009-05-26 16:03:07 +080044ifeq ("$(origin V)", "command line")
45 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046endif
47ifndef KBUILD_VERBOSE
48 KBUILD_VERBOSE = 0
49endif
50
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040051# Call a source code checker (by default, "sparse") as part of the
52# C compilation.
53#
54# Use 'make C=1' to enable checking of only re-compiled files.
55# Use 'make C=2' to enable checking of *all* source files, regardless
56# of whether they are re-compiled or not.
57#
58# See the file "Documentation/sparse.txt" for more details, including
59# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Cheng Renquanb8b06182009-05-26 16:03:07 +080061ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063endif
64ifndef KBUILD_CHECKSRC
65 KBUILD_CHECKSRC = 0
66endif
67
68# Use make M=dir to specify directory of external module to build
69# Old syntax make ... SUBDIRS=$PWD is still supported
70# Setting the environment variable KBUILD_EXTMOD take precedence
71ifdef SUBDIRS
72 KBUILD_EXTMOD ?= $(SUBDIRS)
73endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Cheng Renquanb8b06182009-05-26 16:03:07 +080075ifeq ("$(origin M)", "command line")
76 KBUILD_EXTMOD := $(M)
77endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79# kbuild supports saving output files in a separate directory.
80# To locate output files in a separate directory two syntaxes are supported.
81# In both cases the working directory must be the root of the kernel src.
82# 1) O=
83# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020084#
Linus Torvalds1da177e2005-04-16 15:20:36 -070085# 2) Set KBUILD_OUTPUT
86# Set the environment variable KBUILD_OUTPUT to point to the directory
87# where the output files shall be placed.
88# export KBUILD_OUTPUT=dir/to/store/output/files/
89# make
90#
91# The O= assignment takes precedence over the KBUILD_OUTPUT environment
92# variable.
93
94
95# KBUILD_SRC is set on invocation of make in OBJ directory
96# KBUILD_SRC is not intended to be used by the regular user (for now)
97ifeq ($(KBUILD_SRC),)
98
99# OK, Make called in directory where kernel src resides
100# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800101ifeq ("$(origin O)", "command line")
102 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103endif
104
105# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500106PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107_all:
108
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100109# Cancel implicit rules on top Makefile
110$(CURDIR)/Makefile Makefile: ;
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112ifneq ($(KBUILD_OUTPUT),)
113# Invoke a second make in the output directory, passing relevant variables
114# check that the output directory actually exists
115saved-output := $(KBUILD_OUTPUT)
116KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
117$(if $(KBUILD_OUTPUT),, \
118 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Milton Miller0b357862007-09-21 18:09:02 -0500120PHONY += $(MAKECMDGOALS) sub-make
121
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100122$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500123 $(Q)@:
124
125sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200126 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
127 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500128 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
129 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
131# Leave processing to above invocation of make
132skip-makefile := 1
133endif # ifneq ($(KBUILD_OUTPUT),)
134endif # ifeq ($(KBUILD_SRC),)
135
136# We process the rest of the Makefile if this is the final invocation of make
137ifeq ($(skip-makefile),)
138
139# If building an external module we do not care about the all: rule
140# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500141PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142ifeq ($(KBUILD_EXTMOD),)
143_all: all
144else
145_all: modules
146endif
147
148srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149objtree := $(CURDIR)
150src := $(srctree)
151obj := $(objtree)
152
Mattia Dongili0f558c32006-02-19 13:50:37 +0100153VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
Amerigo Wang11294232009-06-19 03:40:26 -0400155export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
158# SUBARCH tells the usermode build what the underlying arch is. That is set
159# first, and if a usermode build is happening, the "ARCH=um" on the command
160# line overrides the setting of ARCH below. If a native build is happening,
161# then ARCH is assigned, getting whatever value it gets normally, and
162# SUBARCH is subsequently ignored.
163
164SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
165 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800166 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900167 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt3cc000b2009-04-11 08:39:27 +0900168 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170# Cross compiling and selecting different set of gcc/bin-utils
171# ---------------------------------------------------------------------------
172#
173# When performing cross compilation for other architectures ARCH shall be set
174# to the target architecture. (See arch/* for the possibilities).
175# ARCH can be set during invocation of make:
176# make ARCH=ia64
177# Another way is to have ARCH set in the environment.
178# The default ARCH is the host where make is executed.
179
180# CROSS_COMPILE specify the prefix used for all executables used
181# during compilation. Only gcc and related bin-utils executables
182# are prefixed with $(CROSS_COMPILE).
183# CROSS_COMPILE can be set on the command line
184# make CROSS_COMPILE=ia64-linux-
185# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800186# A third alternative is to store a setting in .config so that plain
187# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188# Default value for CROSS_COMPILE is not to prefix executables
189# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100190export KBUILD_BUILDHOST := $(SUBARCH)
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200191ARCH ?= $(SUBARCH)
192CROSS_COMPILE ?=
Roland McGrath84336462009-12-21 16:24:06 -0800193CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
195# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200196UTS_MACHINE := $(ARCH)
197SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Sam Ravnborgd746d642007-11-12 20:14:19 +0100199# Additional ARCH settings for x86
200ifeq ($(ARCH),i386)
201 SRCARCH := x86
202endif
203ifeq ($(ARCH),x86_64)
204 SRCARCH := x86
205endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200206
Sam Ravnborg5e538792008-12-02 23:17:12 -0800207# Additional ARCH settings for sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200208ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800209 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200210endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200211
Paul Mundt3cc000b2009-04-11 08:39:27 +0900212# Additional ARCH settings for sh
213ifeq ($(ARCH),sh64)
214 SRCARCH := sh
215endif
216
Sam Ravnborg5e538792008-12-02 23:17:12 -0800217# Where to locate arch specific headers
218hdr-arch := $(SRCARCH)
219
Sam Ravnborg49148022009-01-16 21:58:10 +1000220ifeq ($(ARCH),m68knommu)
221 hdr-arch := m68k
222endif
223
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700224KCONFIG_CONFIG ?= .config
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226# SHELL used by kbuild
227CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
228 else if [ -x /bin/bash ]; then echo /bin/bash; \
229 else echo sh; fi ; fi)
230
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200231HOSTCC = gcc
232HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800233HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200234HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200236# Decide whether to build built-in, modular, or both.
237# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
239KBUILD_MODULES :=
240KBUILD_BUILTIN := 1
241
242# If we have only "make modules", don't compile built-in objects.
243# When we're building modules with modversions, we need to consider
244# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200245# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247ifeq ($(MAKECMDGOALS),modules)
248 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
249endif
250
251# If we have "make <whatever> modules", compile modules
252# in addition to whatever we do anyway.
253# Just "make" or "make all" shall build modules as well
254
255ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
256 KBUILD_MODULES := 1
257endif
258
259ifeq ($(MAKECMDGOALS),)
260 KBUILD_MODULES := 1
261endif
262
Sam Ravnborge579d352005-07-27 08:10:10 +0200263export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
265
266# Beautify output
267# ---------------------------------------------------------------------------
268#
269# Normally, we echo the whole command before executing it. By making
270# that echo $($(quiet)$(cmd)), we now have the possibility to set
271# $(quiet) to choose other forms of output instead, e.g.
272#
273# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
274# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
275#
276# If $(quiet) is empty, the whole command will be printed.
277# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200278# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279# the variable $(silent_cmd_cc_o_c) doesn't exist.
280#
Adrian Bunka58a4142006-01-10 00:08:17 +0100281# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282# for commands that shall be hidden in non-verbose mode.
283#
284# $(Q)ln $@ :<
285#
286# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
287# If KBUILD_VERBOSE equals 1 then the above command is displayed.
288
289ifeq ($(KBUILD_VERBOSE),1)
290 quiet =
291 Q =
292else
293 quiet=quiet_
294 Q = @
295endif
296
297# If the user is running make -s (silent mode), suppress echoing of
298# commands
299
300ifneq ($(findstring s,$(MAKEFLAGS)),)
301 quiet=silent_
302endif
303
304export quiet Q KBUILD_VERBOSE
305
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
307# Look for make include files relative to root of kernel src
308MAKEFLAGS += --include-dir=$(srctree)
309
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100310# We need some generic definitions (do not try to remake the file).
311$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800312include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
314# Make variables (CC, etc...)
315
316AS = $(CROSS_COMPILE)as
317LD = $(CROSS_COMPILE)ld
318CC = $(CROSS_COMPILE)gcc
319CPP = $(CC) -E
320AR = $(CROSS_COMPILE)ar
321NM = $(CROSS_COMPILE)nm
322STRIP = $(CROSS_COMPILE)strip
323OBJCOPY = $(CROSS_COMPILE)objcopy
324OBJDUMP = $(CROSS_COMPILE)objdump
325AWK = awk
326GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200327INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328DEPMOD = /sbin/depmod
329KALLSYMS = scripts/kallsyms
330PERL = perl
331CHECK = sparse
332
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100333CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
334 -Wbitwise -Wno-return-void $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335MODFLAGS = -DMODULE
336CFLAGS_MODULE = $(MODFLAGS)
337AFLAGS_MODULE = $(MODFLAGS)
Tejun Heo405d9672009-06-24 15:13:38 +0900338LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339CFLAGS_KERNEL =
340AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700341CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343
344# Use LINUXINCLUDE when you must reference the include/ directory.
345# Needed to be compatible with the O= option
Sam Ravnborg24a675e2009-10-17 21:14:18 +0200346LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
Sam Ravnborg96f13042009-10-17 22:33:27 +0200347 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200348 -include include/generated/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100350KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200352KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700353 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300354 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800355 -Wno-format-security \
356 -fno-delete-null-pointer-checks
Sam Ravnborg222d3942007-10-15 21:59:31 +0200357KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700359# Read KERNELRELEASE from include/config/kernel.release (if it exists)
360KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100361KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100362
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200363export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100364export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200365export CPP AR NM STRIP OBJCOPY OBJDUMP
366export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200367export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
Sam Ravnborg06c50402007-10-15 22:17:25 +0200369export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700370export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200371export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
373# When compiling out-of-tree modules, put MODVERDIR in the module
374# tree rather than in the kernel tree. The kernel tree might
375# even be read-only.
376export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378# Files to ignore in find ... statements
379
Trond Myklebust406119f2005-10-27 14:46:53 -0400380RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
381export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
383# ===========================================================================
384# Rules shared between *config targets and build targets
385
386# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500387PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388scripts_basic:
389 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500390 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200392# To avoid any implicit rule to kick in, define an empty command.
393scripts/basic/%: scripts_basic ;
394
Paul Smith4f193362006-03-05 17:14:10 -0500395PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200396# outputmakefile generates a Makefile in the output directory, if using a
397# separate output directory. This allows convenient use of make in the
398# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200400ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100401 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200402 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
403 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
404endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
406# To make sure we do not include .config for any of the *config targets
407# catch them early, and hand them over to scripts/kconfig/Makefile
408# It is allowed to specify more targets when calling make, including
409# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200410# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411# Detect when mixed targets is specified, and make a second invocation
412# of make so .config is not included in this case either (for *config).
413
Roman Zippel3eb3c742007-01-10 14:45:28 +0100414no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700415 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100416 include/linux/version.h headers_% \
417 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
419config-targets := 0
420mixed-targets := 0
421dot-config := 1
422
423ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
424 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
425 dot-config := 0
426 endif
427endif
428
429ifeq ($(KBUILD_EXTMOD),)
430 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
431 config-targets := 1
432 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
433 mixed-targets := 1
434 endif
435 endif
436endif
437
438ifeq ($(mixed-targets),1)
439# ===========================================================================
440# We're called with mixed targets (*config and build targets).
441# Handle them one by one.
442
443%:: FORCE
444 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
445
446else
447ifeq ($(config-targets),1)
448# ===========================================================================
449# *config targets only - make sure prerequisites are updated, and descend
450# in scripts/kconfig to make the *config target
451
452# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
453# KBUILD_DEFCONFIG may point out an alternative default configuration
454# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200455include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400456export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100458config: scripts_basic outputmakefile FORCE
459 $(Q)mkdir -p include/linux include/config
460 $(Q)$(MAKE) $(build)=scripts/kconfig $@
461
462%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700463 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 $(Q)$(MAKE) $(build)=scripts/kconfig $@
465
466else
467# ===========================================================================
468# Build targets only - this includes vmlinux, arch specific targets, clean
469# targets and others. In general all targets except *config targets.
470
471ifeq ($(KBUILD_EXTMOD),)
472# Additional helpers built in scripts/
473# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200474# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500475PHONY += scripts
Michal Marekbc081dd2009-12-07 16:38:33 +0100476scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 $(Q)$(MAKE) $(build)=$(@)
478
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479# Objects we will link into vmlinux / subdirs we need to visit
480init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100481drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482net-y := net/
483libs-y := lib/
484core-y := usr/
485endif # KBUILD_EXTMOD
486
487ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200488# Read in config
489-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200491ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492# Read in dependencies to all Kconfig* files, make sure to run
493# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700494-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700497$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
Roman Zippelc955cca2006-06-08 22:12:39 -0700499# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100500# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200501# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100502# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100503include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
505else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200506# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200507# but do not care if they are up-to-date. Use auto.conf to trigger the test
508PHONY += include/config/auto.conf
509
510include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200511 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200512 echo; \
513 echo " ERROR: Kernel configuration is invalid."; \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200514 echo " include/generated/autoconf.h or $@ are missing.";\
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200515 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
516 echo; \
517 /bin/false)
518
519endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521else
522# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700523include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200524endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
526# The all: target is the default when no target is given on the
527# command line.
528# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200529# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530all: vmlinux
531
532ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200533KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200535KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536endif
537
Ralf Baechlebef5b542008-07-16 13:02:24 +0100538include $(srctree)/arch/$(SRCARCH)/Makefile
539
Mike Frysinger08f67462009-06-04 16:29:08 -0700540ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100541KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
542endif
543
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100544# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900545ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100546KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900547endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100548
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200550KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200552KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553endif
554
555ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200556KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200557KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558endif
559
Steven Rostedt606576c2008-10-06 19:06:12 -0400560ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200561KBUILD_CFLAGS += -pg
562endif
563
Sam Ravnborg91341d42008-01-21 21:31:44 +0100564# We trigger additional mismatches with less inlining
565ifdef CONFIG_DEBUG_SECTION_MISMATCH
566KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
567endif
568
Sam Ravnborge8e69932005-04-30 16:51:42 -0700569# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700570NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700571CHECKFLAGS += $(NOSTDINC_FLAGS)
572
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200574KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200576# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200577KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400579# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700580KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700581
Kyle McMartin00308642009-03-23 15:25:49 -0400582# revert to pre-gcc-4.4 behaviour of .eh_frame
583KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
584
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700585# conserve stack if available
586KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
587
Sam Ravnborg06c50402007-10-15 22:17:25 +0200588# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100589# But warn user when we do so
590warn-assign = \
591$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
592
593ifneq ($(KCPPFLAGS),)
594 $(call warn-assign,CPPFLAGS)
595 KBUILD_CPPFLAGS += $(KCPPFLAGS)
596endif
597ifneq ($(KAFLAGS),)
598 $(call warn-assign,AFLAGS)
599 KBUILD_AFLAGS += $(KAFLAGS)
600endif
601ifneq ($(KCFLAGS),)
602 $(call warn-assign,CFLAGS)
603 KBUILD_CFLAGS += $(KCFLAGS)
604endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200605
Roland McGrath18991192007-07-19 01:48:40 -0700606# Use --build-id when available.
607LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200608 $(call cc-ldoption, -Wl$(comma)--build-id,))
Roland McGrath18991192007-07-19 01:48:40 -0700609LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
610LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
611
David Howells5d7d18f2009-03-04 11:59:07 -0800612ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200613LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800614endif
615
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200617# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618# set in the environment
619# Also any assignments in arch/$(ARCH)/Makefile take precedence over
620# this default value
621export KBUILD_IMAGE ?= vmlinux
622
623#
624# INSTALL_PATH specifies where to place the updated kernel and system map
625# images. Default is /boot, but you can set it to other values
626export INSTALL_PATH ?= /boot
627
628#
629# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
630# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200631# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632#
633
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100634MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635export MODLIB
636
Theodore Ts'oac031f22006-06-21 20:53:09 -0400637#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100638# INSTALL_MOD_STRIP, if defined, will cause modules to be
639# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
640# the default option --strip-debug will be used. Otherwise,
641# INSTALL_MOD_STRIP will used as the options to the strip command.
642
Theodore Ts'oac031f22006-06-21 20:53:09 -0400643ifdef INSTALL_MOD_STRIP
644ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100645mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400646else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100647mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400648endif # INSTALL_MOD_STRIP=1
649else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100650mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400651endif # INSTALL_MOD_STRIP
652export mod_strip_cmd
653
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
655ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100656core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
658vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
659 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
660 $(net-y) $(net-m) $(libs-y) $(libs-m)))
661
662vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
663 $(init-n) $(init-) \
664 $(core-n) $(core-) $(drivers-n) $(drivers-) \
665 $(net-n) $(net-) $(libs-n) $(libs-))))
666
667init-y := $(patsubst %/, %/built-in.o, $(init-y))
668core-y := $(patsubst %/, %/built-in.o, $(core-y))
669drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
670net-y := $(patsubst %/, %/built-in.o, $(net-y))
671libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
672libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
673libs-y := $(libs-y1) $(libs-y2)
674
675# Build vmlinux
676# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200677# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200679# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680# Ordering when linking is important, and $(vmlinux-init) must be first.
681#
682# vmlinux
683# ^
684# |
685# +-< $(vmlinux-init)
686# | +--< init/version.o + more
687# |
688# +--< $(vmlinux-main)
689# | +--< driver/built-in.o mm/built-in.o + more
690# |
691# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
692#
693# vmlinux version (uname -v) cannot be updated during normal
694# descending-into-subdirs phase since we do not yet know if we need to
695# update vmlinux.
696# Therefore this step is delayed until just before final link of vmlinux -
697# except in the kallsyms case where it is done just before adding the
698# symbols to the kernel.
699#
700# System.map is generated to document addresses of all kernel symbols
701
702vmlinux-init := $(head-y) $(init-y)
703vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
704vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200705vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100706export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
708# Rule to link vmlinux - also used during CONFIG_KALLSYMS
709# May be overridden by arch/$(ARCH)/Makefile
710quiet_cmd_vmlinux__ ?= LD $@
711 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
712 -T $(vmlinux-lds) $(vmlinux-init) \
713 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200714 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
716# Generate new vmlinux version
717quiet_cmd_vmlinux_version = GEN .version
718 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200719 if [ ! -r .version ]; then \
720 rm -f .version; \
721 echo 1 >.version; \
722 else \
723 mv .version .old_version; \
724 expr 0$$(cat .old_version) + 1 >.version; \
725 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 $(MAKE) $(build)=init
727
728# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200729quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
731
732# Link of vmlinux
733# If CONFIG_KALLSYMS is set .version is already updated
734# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700735# Use + in front of the vmlinux_version rule to silent warning with make -j2
736# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700738 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
740
741 $(call cmd,vmlinux__)
742 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
743
Sam Ravnborg46352812006-08-08 21:41:18 +0200744 $(Q)$(if $($(quiet)cmd_sysmap), \
745 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
746 $(cmd_sysmap) $@ System.map; \
747 if [ $$? -ne 0 ]; then \
748 rm -f $@; \
749 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 fi;
751 $(verify_kallsyms)
752endef
753
754
755ifdef CONFIG_KALLSYMS
756# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
757# It's a three stage process:
758# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
759# empty
760# Running kallsyms on that gives us .tmp_kallsyms1.o with
761# the right size - vmlinux version (uname -v) is updated during this step
762# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
763# but due to the added section, some addresses have shifted.
764# From here, we generate a correct .tmp_kallsyms2.o
765# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
766# o Verify that the System.map from vmlinux matches the map from
767# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
768# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
769# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
770# temporary bypass to allow the kernel to be built while the
771# maintainers work out what went wrong with kallsyms.
772
773ifdef CONFIG_KALLSYMS_EXTRA_PASS
774last_kallsyms := 3
775else
776last_kallsyms := 2
777endif
778
779kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
780
781define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200782 $(Q)$(if $($(quiet)cmd_sysmap), \
783 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200785 $(Q)cmp -s System.map .tmp_System.map || \
786 (echo Inconsistent kallsyms data; \
787 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 rm .tmp_kallsyms* ; /bin/false )
789endef
790
791# Update vmlinux version before link
792# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200793# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794cmd_ksym_ld = $(cmd_vmlinux__)
795define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200796 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 +$(call cmd,vmlinux_version)
798 $(call cmd,vmlinux__)
799 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
800endef
801
802# Generate .S file with all kernel symbols
803quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100804 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
805 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100807.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 $(call if_changed_dep,as_o_S)
809
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100810.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 $(call cmd,kallsyms)
812
813# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100814.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
815 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100817.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
818 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100820.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
821 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822
823# Needs to visit scripts/ before $(KALLSYMS) can be used.
824$(KALLSYMS): scripts ;
825
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000826# Generate some data for debugging strange kallsyms problems
827debug_kallsyms: .tmp_map$(last_kallsyms)
828
829.tmp_map%: .tmp_vmlinux% FORCE
830 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
831
832.tmp_map3: .tmp_map2
833
834.tmp_map2: .tmp_map1
835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836endif # ifdef CONFIG_KALLSYMS
837
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200838# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
839# relevant sections renamed as per the linker script.
840quiet_cmd_vmlinux-modpost = LD $@
841 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
842 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200843 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200844define rule_vmlinux-modpost
845 :
846 +$(call cmd,vmlinux-modpost)
847 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
848 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
849endef
850
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100852vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700853ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100854 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700855endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700856ifdef CONFIG_SAMPLES
857 $(Q)$(MAKE) $(build)=samples
858endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700859ifdef CONFIG_BUILD_DOCSRC
860 $(Q)$(MAKE) $(build)=Documentation
861endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200862 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200864 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865
Sam Ravnborg310f8242008-01-21 22:57:09 +0100866# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100867ifdef CONFIG_KALLSYMS
868.tmp_vmlinux1: vmlinux.o
869endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200870
871modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
872vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200873 $(call if_changed_rule,vmlinux-modpost)
874
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875# The actual objects are generated when descending,
876# make sure no implicit rule kicks in
877$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
878
879# Handle descending into subdirectories listed in $(vmlinux-dirs)
880# Preset locale variables to speed up the build process. Limit locale
881# tweaks to this spot to avoid wrong language settings when running
882# make menuconfig etc.
883# Error messages still appears in the original language
884
Paul Smith4f193362006-03-05 17:14:10 -0500885PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200886$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 $(Q)$(MAKE) $(build)=$@
Michal Marekbc081dd2009-12-07 16:38:33 +0100888ifdef CONFIG_MODULES
889 $(Q)$(MAKE) $(modbuiltin)=$@
890endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891
Sam Ravnborgcb584552006-01-09 21:20:34 +0100892# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100893#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400894# The KERNELRELEASE value built here is stored in the file
895# include/config/kernel.release, and is used when executing several
896# make targets, such as "make install" or "make modules_install."
897#
898# The eventual kernel release string consists of the following fields,
899# shown in a hierarchical format to show how smaller parts are concatenated
900# to form the larger and final value, with values coming from places like
901# the Makefile, kernel config options, make command line options and/or
902# SCM tag information.
903#
904# $(KERNELVERSION)
905# $(VERSION) eg, 2
906# $(PATCHLEVEL) eg, 6
907# $(SUBLEVEL) eg, 18
908# $(EXTRAVERSION) eg, -rc6
909# $(localver-full)
910# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100911# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400912# $(CONFIG_LOCALVERSION) (from kernel config setting)
913# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
914# ./scripts/setlocalversion (SCM tag, if one exists)
915# $(LOCALVERSION) (from make command line if provided)
916#
917# Note how the final $(localver-auto) string is included *only* if the
918# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
919# moment, only git is supported but other SCMs can edit the script
920# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100921
Oleg Verych76c32952007-02-06 02:18:22 +0100922pattern = ".*/localversion[^~]*"
923string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800924 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100925
Oleg Verych76c32952007-02-06 02:18:22 +0100926localver = $(subst $(space),, $(string) \
927 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200928
Sam Ravnborgcb584552006-01-09 21:20:34 +0100929# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
930# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200931# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100932#
Josh Huntb925dbf2009-02-12 10:16:05 -0800933# .scmversion is used when generating rpm packages so we do not loose
934# the version information from the SCM when we do the build of the kernel
935# from the copied source
Sam Ravnborgcb584552006-01-09 21:20:34 +0100936ifdef CONFIG_LOCALVERSION_AUTO
Josh Huntb925dbf2009-02-12 10:16:05 -0800937
938ifeq ($(wildcard .scmversion),)
939 _localver-auto = $(shell $(CONFIG_SHELL) \
940 $(srctree)/scripts/setlocalversion $(srctree))
941else
942 _localver-auto = $(shell cat .scmversion 2> /dev/null)
943endif
944
Sam Ravnborgcb584552006-01-09 21:20:34 +0100945 localver-auto = $(LOCALVERSION)$(_localver-auto)
946endif
947
948localver-full = $(localver)$(localver-auto)
949
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700950# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100951kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700952include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100953 $(Q)rm -f $@
954 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100955
956
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200958# or the modules are listed in "prepare".
959# A multi level approach is used. prepareN is processed before prepareN-1.
960# archprepare is used in arch Makefiles and when processed asm symlink,
961# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200963# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500964PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200965
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200966# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967# and if so do:
968# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700969prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500971 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700972 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 echo " $(srctree) is not clean, please run 'make mrproper'";\
974 echo " in the '$(srctree)' directory.";\
975 /bin/false; \
976 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977endif
978
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200979# prepare2 creates a makefile if using a separate output directory
980prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
Sam Ravnborg273b2812009-10-18 00:52:28 +0200982prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200983 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200984 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200986archprepare: prepare1 scripts_basic
987
988prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200989 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200990 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800993prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995# Generate some files
996# ---------------------------------------------------------------------------
997
998# KERNELRELEASE can change from a few different places, meaning version.h
999# needs to be updated, so this check is forced on all builds
1000
1001uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001002define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001004 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1005 exit 1; \
1006 fi; \
1007 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008endef
1009
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001010define filechk_version.h
1011 (echo \#define LINUX_VERSION_CODE $(shell \
1012 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1013 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1014endef
1015
1016include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 $(call filechk,version.h)
1018
Sam Ravnborg273b2812009-10-18 00:52:28 +02001019include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001020 $(call filechk,utsrelease.h)
1021
Vegard Nossum179efcb2008-12-16 12:33:43 +01001022PHONY += headerdep
1023headerdep:
1024 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1025
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026# ---------------------------------------------------------------------------
1027
Paul Smith4f193362006-03-05 17:14:10 -05001028PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029depend dep:
1030 @echo '*** Warning: make $@ is unnecessary now.'
1031
1032# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001033# Firmware install
1034INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1035export INSTALL_FW_PATH
1036
1037PHONY += firmware_install
1038firmware_install: FORCE
1039 @mkdir -p $(objtree)/firmware
1040 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1041
1042# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001043# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001044
Sam Ravnborge6883b12008-06-05 16:43:46 +02001045#Default location for installed headers
1046export INSTALL_HDR_PATH = $(objtree)/usr
1047
Sam Ravnborge6883b12008-06-05 16:43:46 +02001048hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001049
1050# If we do an all arch process set dst to asm-$(hdr-arch)
1051hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001052
1053PHONY += __headers
1054__headers: include/linux/version.h scripts_basic FORCE
1055 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001056
1057PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001058headers_install_all:
1059 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001060
David Woodhouse8d730cf2006-06-18 11:58:39 +01001061PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001062headers_install: __headers
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001063 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001064 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001065 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001066 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001067
Mike Frysinger1f857122007-02-14 00:33:02 -08001068PHONY += headers_check_all
1069headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001070 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001071
David Woodhouse68475352006-06-18 12:02:10 +01001072PHONY += headers_check
1073headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001074 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001075 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001076
David Woodhouse8d730cf2006-06-18 11:58:39 +01001077# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078# Modules
1079
1080ifdef CONFIG_MODULES
1081
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001082# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
1084all: modules
1085
1086# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001087#
1088# A module can be listed more than once in obj-m resulting in
1089# duplicate lines in modules.order files. Those are removed
1090# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091
Paul Smith4f193362006-03-05 17:14:10 -05001092PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001094 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Michal Marekbc081dd2009-12-07 16:38:33 +01001095 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.builtin) > $(objtree)/modules.builtin
Mike Frysingerfd54f502008-11-06 03:31:35 -05001096 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001097 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001098 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099
1100
1101# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001102PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001103modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104
1105# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001106PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107modules_install: _modinst_ _modinst_post
1108
Paul Smith4f193362006-03-05 17:14:10 -05001109PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001111 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 echo "Warning: you may need to install module-init-tools"; \
1113 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1114 sleep 1; \
1115 fi
1116 @rm -rf $(MODLIB)/kernel
1117 @rm -f $(MODLIB)/source
1118 @mkdir -p $(MODLIB)/kernel
1119 @ln -s $(srctree) $(MODLIB)/source
1120 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1121 rm -f $(MODLIB)/build ; \
1122 ln -s $(objtree) $(MODLIB)/build ; \
1123 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001124 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001125 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001126 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001128# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129# boot a modules.dep even before / is mounted read-write. However the
1130# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001131PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001133 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001134 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135
1136else # CONFIG_MODULES
1137
1138# Modules not configured
1139# ---------------------------------------------------------------------------
1140
1141modules modules_install: FORCE
1142 @echo
1143 @echo "The present kernel configuration has modules disabled."
1144 @echo "Type 'make config' and enable loadable module support."
1145 @echo "Then build a kernel with module support enabled."
1146 @echo
1147 @exit 1
1148
1149endif # CONFIG_MODULES
1150
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151###
1152# Cleaning is done on three levels.
1153# make clean Delete most generated files
1154# Leave enough to build external modules
1155# make mrproper Delete the current configuration, and all generated files
1156# make distclean Remove editor backup files, patch leftover files and the like
1157
1158# Directories & files removed with 'make clean'
1159CLEAN_DIRS += $(MODVERDIR)
1160CLEAN_FILES += vmlinux System.map \
1161 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1162
1163# Directories & files removed with 'make mrproper'
Sam Ravnborg96f13042009-10-17 22:33:27 +02001164MRPROPER_DIRS += include/config usr/include include/generated
Sam Ravnborgf7f16b72009-10-18 00:00:43 +02001165MRPROPER_FILES += .config .config.old .version .old_version \
Sam Ravnborg264a2682009-10-18 00:49:24 +02001166 include/linux/version.h \
Wenji Huang8723eae2009-11-19 08:44:32 +08001167 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
1169# clean - Delete most, but leave enough to build external modules
1170#
1171clean: rm-dirs := $(CLEAN_DIRS)
1172clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001173clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174
Paul Smith4f193362006-03-05 17:14:10 -05001175PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176$(clean-dirs):
1177 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1178
1179clean: archclean $(clean-dirs)
1180 $(call cmd,rmdirs)
1181 $(call cmd,rmfiles)
1182 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001183 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001184 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001185 -o -name '*.symtypes' -o -name 'modules.order' \
Michal Marekd9bdcc72009-12-08 16:03:10 +01001186 -o -name modules.builtin -o -name '.tmp_*.o.*' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001187 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188
1189# mrproper - Delete all generated files, including .config
1190#
1191mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1192mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1193mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1194
Paul Smith4f193362006-03-05 17:14:10 -05001195PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196$(mrproper-dirs):
1197 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1198
1199mrproper: clean archmrproper $(mrproper-dirs)
1200 $(call cmd,rmdirs)
1201 $(call cmd,rmfiles)
1202
1203# distclean
1204#
Paul Smith4f193362006-03-05 17:14:10 -05001205PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
1207distclean: mrproper
1208 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001209 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001211 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1213 -type f -print | xargs rm -f
1214
1215
1216# Packaging of the kernel to various formats
1217# ---------------------------------------------------------------------------
1218# rpm target kept for backward compatibility
1219package-dir := $(srctree)/scripts/package
1220
Zach Brown031ecc62006-06-08 22:12:37 -07001221%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001222 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001223rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001224 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
1226
1227# Brief documentation of the typical targets used
1228# ---------------------------------------------------------------------------
1229
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001230boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001232board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1233board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
1235help:
1236 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001237 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001238 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001239 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001240 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 @echo ''
1242 @echo 'Configuration targets:'
1243 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1244 @echo ''
1245 @echo 'Other generic targets:'
1246 @echo ' all - Build all targets marked with [*]'
1247 @echo '* vmlinux - Build the bare kernel'
1248 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001249 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001250 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1251 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 @echo ' dir/ - Build all files in dir and below'
1253 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001254 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001255 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 @echo ' tags/TAGS - Generate tags file for editors'
1257 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001258 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001259 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001260 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001261 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001262 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 @echo ' checkstack - Generate a list of stack hogs'
1265 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001266 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001267 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001268 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001269 @echo ' headers_check - Sanity check on exported headers'
1270 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001271 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001273 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 @echo ''
1275 @echo 'Documentation targets:'
1276 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1277 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001278 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001280 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 @echo ''
1282 @$(if $(boards), \
1283 $(foreach b, $(boards), \
1284 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1285 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001286 @$(if $(board-dirs), \
1287 $(foreach b, $(board-dirs), \
1288 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1289 printf " %-16s - Show all of the above\\n" help-boards; \
1290 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291
1292 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001293 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001295 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1296 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297 @echo ''
1298 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1299 @echo 'For further info see the ./README file'
1300
1301
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001302help-board-dirs := $(addprefix help-,$(board-dirs))
1303
1304help-boards: $(help-board-dirs)
1305
1306boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1307
1308$(help-board-dirs): help-%:
1309 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1310 @$(if $(boards-per-dir), \
1311 $(foreach b, $(boards-per-dir), \
1312 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1313 echo '')
1314
1315
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316# Documentation targets
1317# ---------------------------------------------------------------------------
1318%docs: scripts_basic FORCE
1319 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1320
1321else # KBUILD_EXTMOD
1322
1323###
1324# External module support.
1325# When building external modules the kernel used as basis is considered
1326# read-only, and no consistency checks are made and the make
1327# system is not used on the basis kernel. If updates are required
1328# in the basis kernel ordinary make commands (without M=...) must
1329# be used.
1330#
1331# The following are the only valid targets when building external
1332# modules.
1333# make M=dir clean Delete all automatically generated files
1334# make M=dir modules Make all modules in specified dir
1335# make M=dir Same as 'make M=dir modules'
1336# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001337# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338# Assumes install directory is already created
1339
1340# We are always building modules
1341KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001342PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001344 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
Paul Smith4f193362006-03-05 17:14:10 -05001346PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347$(objtree)/Module.symvers:
1348 @test -e $(objtree)/Module.symvers || ( \
1349 echo; \
1350 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1351 echo " is missing; modules will have no dependencies and modversions."; \
1352 echo )
1353
1354module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001355PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356$(module-dirs): crmodverdir $(objtree)/Module.symvers
1357 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1358
1359modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001360 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001361 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362
Paul Smith4f193362006-03-05 17:14:10 -05001363PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001364modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001365
Paul Smith4f193362006-03-05 17:14:10 -05001366install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1367PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001368_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001369 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001370 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371
Paul Smith4f193362006-03-05 17:14:10 -05001372PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001373_emodinst_post: _emodinst_
1374 $(call cmd,depmod)
1375
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1377
Paul Smith4f193362006-03-05 17:14:10 -05001378PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379$(clean-dirs):
1380 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1381
1382clean: rm-dirs := $(MODVERDIR)
Frédéric Brière0c560422009-04-19 12:58:40 -04001383clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
Michal Marekbc081dd2009-12-07 16:38:33 +01001384 $(KBUILD_EXTMOD)/modules.order \
1385 $(KBUILD_EXTMOD)/modules.builtin
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386clean: $(clean-dirs)
1387 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001388 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001390 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001391 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1392 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393
1394help:
1395 @echo ' Building external modules.'
1396 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1397 @echo ''
1398 @echo ' modules - default target, build the module(s)'
1399 @echo ' modules_install - install the module'
1400 @echo ' clean - remove generated files in module directory only'
1401 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001402
1403# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001404PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001405prepare: ;
1406scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407endif # KBUILD_EXTMOD
1408
1409# Generate tags for editors
1410# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001411quiet_cmd_tags = GEN $@
1412 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
Sam Ravnborga680eed2008-12-03 22:24:13 +01001414tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 $(call cmd,tags)
1416
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417# Scripts to check various things for consistency
1418# ---------------------------------------------------------------------------
1419
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420includecheck:
1421 find * $(RCS_FIND_IGNORE) \
1422 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001423 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
1425versioncheck:
1426 find * $(RCS_FIND_IGNORE) \
1427 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001428 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430namespacecheck:
1431 $(PERL) $(srctree)/scripts/namespace.pl
1432
Adrian Bunk295ac052007-08-24 23:04:56 +02001433export_report:
1434 $(PERL) $(srctree)/scripts/export_report.pl
1435
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436endif #ifeq ($(config-targets),1)
1437endif #ifeq ($(mixed-targets),1)
1438
Roman Zippelc30a02e2006-06-08 22:12:50 -07001439PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001440
Jeff Dike011e3a92006-12-13 00:34:12 -08001441# UML needs a little special treatment here. It wants to use the host
1442# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1443# else wants $(ARCH), including people doing cross-builds, which means
1444# that $(SUBARCH) doesn't work here.
1445ifeq ($(ARCH), um)
1446CHECKSTACK_ARCH := $(SUBARCH)
1447else
1448CHECKSTACK_ARCH := $(ARCH)
1449endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450checkstack:
1451 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001452 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453
1454kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001455 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1456 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001457kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001458 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001459
Sam Ravnborg06300b22006-01-25 07:13:18 +01001460# Single targets
1461# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001462# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001463# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001464# - build with separate output dir 'make O=...'
1465# - external modules
1466#
1467# target-dir => where to store outputfile
1468# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001469
Sam Ravnborg06300b22006-01-25 07:13:18 +01001470ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001471 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001472 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001473else
1474 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001475 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1476 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001477endif
1478
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001479%.s: %.c prepare scripts FORCE
1480 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1481%.i: %.c prepare scripts FORCE
1482 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1483%.o: %.c prepare scripts FORCE
1484 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1485%.lst: %.c prepare scripts FORCE
1486 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1487%.s: %.S prepare scripts FORCE
1488 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1489%.o: %.S prepare scripts FORCE
1490 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001491%.symtypes: %.c prepare scripts FORCE
1492 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001493
1494# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001495/: prepare scripts FORCE
1496 $(cmd_crmodverdir)
1497 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1498 $(build)=$(build-dir)
1499%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001500 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001501 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001502 $(build)=$(build-dir)
1503%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001504 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001505 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001506 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001507 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001508
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509# FIXME Should go into a make.lib or something
1510# ===========================================================================
1511
1512quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1513 cmd_rmdirs = rm -rf $(rm-dirs)
1514
1515quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1516 cmd_rmfiles = rm -f $(rm-files)
1517
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001518# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001519quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1520 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001521 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001522 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001523 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001524 $(KERNELRELEASE); \
1525 fi
1526
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001527# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001528# clean it up only when building all modules
1529cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1530 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531
Sam Ravnborg222d3942007-10-15 21:59:31 +02001532a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001533 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001534 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
1536quiet_cmd_as_o_S = AS $@
1537cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1538
1539# read all saved command lines
1540
1541targets := $(wildcard $(sort $(targets)))
1542cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1543
1544ifneq ($(cmd_files),)
1545 $(cmd_files): ; # Do not try to update included dependency files
1546 include $(cmd_files)
1547endif
1548
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1550# Usage:
1551# $(Q)$(MAKE) $(clean)=dir
1552clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1553
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554endif # skip-makefile
1555
Paul Smith4f193362006-03-05 17:14:10 -05001556PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001558
Paul Smith4f193362006-03-05 17:14:10 -05001559# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001560# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001561.PHONY: $(PHONY)