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Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvalds57d54882010-03-08 10:45:44 -08003SUBLEVEL = 34
Linus Torvalds220bf992010-03-19 18:17:57 -07004EXTRAVERSION = -rc2
Linus Torvalds59a37592009-05-23 14:47:00 -07005NAME = Man-Eating Seals of Antiquity
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
7# *DOCUMENTATION*
8# To see a list of typical targets execute "make help"
9# More info can be located in ./README
10# Comments in this file are targeted only to the developer, do not
11# expect to learn how to build the kernel reading this file.
12
Oleg Verych15964862006-12-10 02:18:40 -080013# Do not:
14# o use make's built-in rules and variables
Linus Nilssond384e352008-01-20 17:10:01 +010015# (this increases performance and avoids hard-to-debug behaviour);
Oleg Verych15964862006-12-10 02:18:40 -080016# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
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.
186# Default value for CROSS_COMPILE is not to prefix executables
187# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100188export KBUILD_BUILDHOST := $(SUBARCH)
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200189ARCH ?= $(SUBARCH)
190CROSS_COMPILE ?=
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
192# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200193UTS_MACHINE := $(ARCH)
194SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Sam Ravnborgd746d642007-11-12 20:14:19 +0100196# Additional ARCH settings for x86
197ifeq ($(ARCH),i386)
198 SRCARCH := x86
199endif
200ifeq ($(ARCH),x86_64)
201 SRCARCH := x86
202endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200203
Sam Ravnborg5e538792008-12-02 23:17:12 -0800204# Additional ARCH settings for sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200205ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800206 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200207endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200208
Paul Mundt3cc000b2009-04-11 08:39:27 +0900209# Additional ARCH settings for sh
210ifeq ($(ARCH),sh64)
211 SRCARCH := sh
212endif
213
Sam Ravnborg5e538792008-12-02 23:17:12 -0800214# Where to locate arch specific headers
215hdr-arch := $(SRCARCH)
216
Sam Ravnborg49148022009-01-16 21:58:10 +1000217ifeq ($(ARCH),m68knommu)
218 hdr-arch := m68k
219endif
220
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700221KCONFIG_CONFIG ?= .config
222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223# SHELL used by kbuild
224CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
225 else if [ -x /bin/bash ]; then echo /bin/bash; \
226 else echo sh; fi ; fi)
227
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200228HOSTCC = gcc
229HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800230HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200231HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200233# Decide whether to build built-in, modular, or both.
234# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
236KBUILD_MODULES :=
237KBUILD_BUILTIN := 1
238
239# If we have only "make modules", don't compile built-in objects.
240# When we're building modules with modversions, we need to consider
241# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200242# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
244ifeq ($(MAKECMDGOALS),modules)
245 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
246endif
247
248# If we have "make <whatever> modules", compile modules
249# in addition to whatever we do anyway.
250# Just "make" or "make all" shall build modules as well
251
252ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
253 KBUILD_MODULES := 1
254endif
255
256ifeq ($(MAKECMDGOALS),)
257 KBUILD_MODULES := 1
258endif
259
Sam Ravnborge579d352005-07-27 08:10:10 +0200260export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
262
263# Beautify output
264# ---------------------------------------------------------------------------
265#
266# Normally, we echo the whole command before executing it. By making
267# that echo $($(quiet)$(cmd)), we now have the possibility to set
268# $(quiet) to choose other forms of output instead, e.g.
269#
270# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
271# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
272#
273# If $(quiet) is empty, the whole command will be printed.
274# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200275# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276# the variable $(silent_cmd_cc_o_c) doesn't exist.
277#
Adrian Bunka58a4142006-01-10 00:08:17 +0100278# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279# for commands that shall be hidden in non-verbose mode.
280#
281# $(Q)ln $@ :<
282#
283# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
284# If KBUILD_VERBOSE equals 1 then the above command is displayed.
285
286ifeq ($(KBUILD_VERBOSE),1)
287 quiet =
288 Q =
289else
290 quiet=quiet_
291 Q = @
292endif
293
294# If the user is running make -s (silent mode), suppress echoing of
295# commands
296
297ifneq ($(findstring s,$(MAKEFLAGS)),)
298 quiet=silent_
299endif
300
301export quiet Q KBUILD_VERBOSE
302
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304# Look for make include files relative to root of kernel src
305MAKEFLAGS += --include-dir=$(srctree)
306
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100307# We need some generic definitions (do not try to remake the file).
308$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800309include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
311# Make variables (CC, etc...)
312
313AS = $(CROSS_COMPILE)as
314LD = $(CROSS_COMPILE)ld
315CC = $(CROSS_COMPILE)gcc
316CPP = $(CC) -E
317AR = $(CROSS_COMPILE)ar
318NM = $(CROSS_COMPILE)nm
319STRIP = $(CROSS_COMPILE)strip
320OBJCOPY = $(CROSS_COMPILE)objcopy
321OBJDUMP = $(CROSS_COMPILE)objdump
322AWK = awk
323GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200324INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325DEPMOD = /sbin/depmod
326KALLSYMS = scripts/kallsyms
327PERL = perl
328CHECK = sparse
329
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100330CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
331 -Wbitwise -Wno-return-void $(CF)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332MODFLAGS = -DMODULE
333CFLAGS_MODULE = $(MODFLAGS)
334AFLAGS_MODULE = $(MODFLAGS)
Tejun Heo405d9672009-06-24 15:13:38 +0900335LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336CFLAGS_KERNEL =
337AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700338CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340
341# Use LINUXINCLUDE when you must reference the include/ directory.
342# Needed to be compatible with the O= option
Sam Ravnborg24a675e2009-10-17 21:14:18 +0200343LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
Sam Ravnborg96f13042009-10-17 22:33:27 +0200344 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200345 -include include/generated/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100347KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200349KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700350 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300351 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800352 -Wno-format-security \
353 -fno-delete-null-pointer-checks
Sam Ravnborg222d3942007-10-15 21:59:31 +0200354KBUILD_AFLAGS := -D__ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700356# Read KERNELRELEASE from include/config/kernel.release (if it exists)
357KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100358KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100359
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200360export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100361export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200362export CPP AR NM STRIP OBJCOPY OBJDUMP
363export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200364export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
Sam Ravnborg06c50402007-10-15 22:17:25 +0200366export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700367export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200368export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370# When compiling out-of-tree modules, put MODVERDIR in the module
371# tree rather than in the kernel tree. The kernel tree might
372# even be read-only.
373export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
374
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375# Files to ignore in find ... statements
376
Trond Myklebust406119f2005-10-27 14:46:53 -0400377RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
378export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
380# ===========================================================================
381# Rules shared between *config targets and build targets
382
383# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500384PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385scripts_basic:
386 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500387 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200389# To avoid any implicit rule to kick in, define an empty command.
390scripts/basic/%: scripts_basic ;
391
Paul Smith4f193362006-03-05 17:14:10 -0500392PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200393# outputmakefile generates a Makefile in the output directory, if using a
394# separate output directory. This allows convenient use of make in the
395# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200397ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100398 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200399 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
400 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
401endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403# To make sure we do not include .config for any of the *config targets
404# catch them early, and hand them over to scripts/kconfig/Makefile
405# It is allowed to specify more targets when calling make, including
406# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200407# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408# Detect when mixed targets is specified, and make a second invocation
409# of make so .config is not included in this case either (for *config).
410
Roman Zippel3eb3c742007-01-10 14:45:28 +0100411no-dot-config-targets := clean mrproper distclean \
Roman Zippelc30a02e2006-06-08 22:12:50 -0700412 cscope TAGS tags help %docs check% \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100413 include/linux/version.h headers_% \
414 kernelrelease kernelversion
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
416config-targets := 0
417mixed-targets := 0
418dot-config := 1
419
420ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
421 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
422 dot-config := 0
423 endif
424endif
425
426ifeq ($(KBUILD_EXTMOD),)
427 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
428 config-targets := 1
429 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
430 mixed-targets := 1
431 endif
432 endif
433endif
434
435ifeq ($(mixed-targets),1)
436# ===========================================================================
437# We're called with mixed targets (*config and build targets).
438# Handle them one by one.
439
440%:: FORCE
441 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
442
443else
444ifeq ($(config-targets),1)
445# ===========================================================================
446# *config targets only - make sure prerequisites are updated, and descend
447# in scripts/kconfig to make the *config target
448
449# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
450# KBUILD_DEFCONFIG may point out an alternative default configuration
451# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200452include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400453export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100455config: scripts_basic outputmakefile FORCE
456 $(Q)mkdir -p include/linux include/config
457 $(Q)$(MAKE) $(build)=scripts/kconfig $@
458
459%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700460 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 $(Q)$(MAKE) $(build)=scripts/kconfig $@
462
463else
464# ===========================================================================
465# Build targets only - this includes vmlinux, arch specific targets, clean
466# targets and others. In general all targets except *config targets.
467
468ifeq ($(KBUILD_EXTMOD),)
469# Additional helpers built in scripts/
470# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200471# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500472PHONY += scripts
Michal Marekbc081dd2009-12-07 16:38:33 +0100473scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 $(Q)$(MAKE) $(build)=$(@)
475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476# Objects we will link into vmlinux / subdirs we need to visit
477init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100478drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479net-y := net/
480libs-y := lib/
481core-y := usr/
482endif # KBUILD_EXTMOD
483
484ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200485# Read in config
486-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200488ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489# Read in dependencies to all Kconfig* files, make sure to run
490# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700491-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700494$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
Roman Zippelc955cca2006-06-08 22:12:39 -0700496# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100497# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200498# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100499# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100500include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
502else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200503# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200504# but do not care if they are up-to-date. Use auto.conf to trigger the test
505PHONY += include/config/auto.conf
506
507include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200508 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200509 echo; \
510 echo " ERROR: Kernel configuration is invalid."; \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200511 echo " include/generated/autoconf.h or $@ are missing.";\
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200512 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
513 echo; \
514 /bin/false)
515
516endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518else
519# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700520include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200521endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
523# The all: target is the default when no target is given on the
524# command line.
525# This allow a user to issue only 'make' to build a kernel including modules
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200526# Defaults vmlinux but it is usually overridden in the arch makefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527all: vmlinux
528
529ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200530KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200532KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533endif
534
Ralf Baechlebef5b542008-07-16 13:02:24 +0100535include $(srctree)/arch/$(SRCARCH)/Makefile
536
Mike Frysinger08f67462009-06-04 16:29:08 -0700537ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100538KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
539endif
540
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100541# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900542ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100543KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900544endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100545
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200547KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200549KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550endif
551
552ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200553KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200554KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555endif
556
Steven Rostedt606576c2008-10-06 19:06:12 -0400557ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200558KBUILD_CFLAGS += -pg
559endif
560
Sam Ravnborg91341d42008-01-21 21:31:44 +0100561# We trigger additional mismatches with less inlining
562ifdef CONFIG_DEBUG_SECTION_MISMATCH
563KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
564endif
565
Sam Ravnborge8e69932005-04-30 16:51:42 -0700566# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700567NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700568CHECKFLAGS += $(NOSTDINC_FLAGS)
569
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200571KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200573# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200574KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400576# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700577KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700578
Kyle McMartin00308642009-03-23 15:25:49 -0400579# revert to pre-gcc-4.4 behaviour of .eh_frame
580KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
581
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700582# conserve stack if available
583KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
584
Sam Ravnborg06c50402007-10-15 22:17:25 +0200585# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100586# But warn user when we do so
587warn-assign = \
588$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
589
590ifneq ($(KCPPFLAGS),)
591 $(call warn-assign,CPPFLAGS)
592 KBUILD_CPPFLAGS += $(KCPPFLAGS)
593endif
594ifneq ($(KAFLAGS),)
595 $(call warn-assign,AFLAGS)
596 KBUILD_AFLAGS += $(KAFLAGS)
597endif
598ifneq ($(KCFLAGS),)
599 $(call warn-assign,CFLAGS)
600 KBUILD_CFLAGS += $(KCFLAGS)
601endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200602
Roland McGrath18991192007-07-19 01:48:40 -0700603# Use --build-id when available.
604LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200605 $(call cc-ldoption, -Wl$(comma)--build-id,))
Roland McGrath18991192007-07-19 01:48:40 -0700606LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
607LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
608
David Howells5d7d18f2009-03-04 11:59:07 -0800609ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200610LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800611endif
612
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200614# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615# set in the environment
616# Also any assignments in arch/$(ARCH)/Makefile take precedence over
617# this default value
618export KBUILD_IMAGE ?= vmlinux
619
620#
621# INSTALL_PATH specifies where to place the updated kernel and system map
622# images. Default is /boot, but you can set it to other values
623export INSTALL_PATH ?= /boot
624
625#
626# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
627# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200628# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629#
630
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100631MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632export MODLIB
633
Theodore Ts'oac031f22006-06-21 20:53:09 -0400634#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100635# INSTALL_MOD_STRIP, if defined, will cause modules to be
636# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
637# the default option --strip-debug will be used. Otherwise,
638# INSTALL_MOD_STRIP will used as the options to the strip command.
639
Theodore Ts'oac031f22006-06-21 20:53:09 -0400640ifdef INSTALL_MOD_STRIP
641ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100642mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400643else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100644mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400645endif # INSTALL_MOD_STRIP=1
646else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100647mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400648endif # INSTALL_MOD_STRIP
649export mod_strip_cmd
650
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
652ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100653core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
655vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
656 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
657 $(net-y) $(net-m) $(libs-y) $(libs-m)))
658
659vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
660 $(init-n) $(init-) \
661 $(core-n) $(core-) $(drivers-n) $(drivers-) \
662 $(net-n) $(net-) $(libs-n) $(libs-))))
663
664init-y := $(patsubst %/, %/built-in.o, $(init-y))
665core-y := $(patsubst %/, %/built-in.o, $(core-y))
666drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
667net-y := $(patsubst %/, %/built-in.o, $(net-y))
668libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
669libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
670libs-y := $(libs-y1) $(libs-y2)
671
672# Build vmlinux
673# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200674# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200676# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677# Ordering when linking is important, and $(vmlinux-init) must be first.
678#
679# vmlinux
680# ^
681# |
682# +-< $(vmlinux-init)
683# | +--< init/version.o + more
684# |
685# +--< $(vmlinux-main)
686# | +--< driver/built-in.o mm/built-in.o + more
687# |
688# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
689#
690# vmlinux version (uname -v) cannot be updated during normal
691# descending-into-subdirs phase since we do not yet know if we need to
692# update vmlinux.
693# Therefore this step is delayed until just before final link of vmlinux -
694# except in the kallsyms case where it is done just before adding the
695# symbols to the kernel.
696#
697# System.map is generated to document addresses of all kernel symbols
698
699vmlinux-init := $(head-y) $(init-y)
700vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
701vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200702vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100703export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
705# Rule to link vmlinux - also used during CONFIG_KALLSYMS
706# May be overridden by arch/$(ARCH)/Makefile
707quiet_cmd_vmlinux__ ?= LD $@
708 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
709 -T $(vmlinux-lds) $(vmlinux-init) \
710 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200711 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713# Generate new vmlinux version
714quiet_cmd_vmlinux_version = GEN .version
715 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200716 if [ ! -r .version ]; then \
717 rm -f .version; \
718 echo 1 >.version; \
719 else \
720 mv .version .old_version; \
721 expr 0$$(cat .old_version) + 1 >.version; \
722 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 $(MAKE) $(build)=init
724
725# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200726quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
728
729# Link of vmlinux
730# If CONFIG_KALLSYMS is set .version is already updated
731# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700732# Use + in front of the vmlinux_version rule to silent warning with make -j2
733# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700735 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
737
738 $(call cmd,vmlinux__)
739 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
740
Sam Ravnborg46352812006-08-08 21:41:18 +0200741 $(Q)$(if $($(quiet)cmd_sysmap), \
742 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
743 $(cmd_sysmap) $@ System.map; \
744 if [ $$? -ne 0 ]; then \
745 rm -f $@; \
746 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 fi;
748 $(verify_kallsyms)
749endef
750
751
752ifdef CONFIG_KALLSYMS
753# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
754# It's a three stage process:
755# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
756# empty
757# Running kallsyms on that gives us .tmp_kallsyms1.o with
758# the right size - vmlinux version (uname -v) is updated during this step
759# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
760# but due to the added section, some addresses have shifted.
761# From here, we generate a correct .tmp_kallsyms2.o
762# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
763# o Verify that the System.map from vmlinux matches the map from
764# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
765# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
766# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
767# temporary bypass to allow the kernel to be built while the
768# maintainers work out what went wrong with kallsyms.
769
770ifdef CONFIG_KALLSYMS_EXTRA_PASS
771last_kallsyms := 3
772else
773last_kallsyms := 2
774endif
775
776kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
777
778define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200779 $(Q)$(if $($(quiet)cmd_sysmap), \
780 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200782 $(Q)cmp -s System.map .tmp_System.map || \
783 (echo Inconsistent kallsyms data; \
784 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 rm .tmp_kallsyms* ; /bin/false )
786endef
787
788# Update vmlinux version before link
789# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200790# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791cmd_ksym_ld = $(cmd_vmlinux__)
792define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200793 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 +$(call cmd,vmlinux_version)
795 $(call cmd,vmlinux__)
796 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
797endef
798
799# Generate .S file with all kernel symbols
800quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100801 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
802 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100804.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 $(call if_changed_dep,as_o_S)
806
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100807.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 $(call cmd,kallsyms)
809
810# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100811.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
812 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100814.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
815 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100817.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
818 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
820# Needs to visit scripts/ before $(KALLSYMS) can be used.
821$(KALLSYMS): scripts ;
822
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000823# Generate some data for debugging strange kallsyms problems
824debug_kallsyms: .tmp_map$(last_kallsyms)
825
826.tmp_map%: .tmp_vmlinux% FORCE
827 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
828
829.tmp_map3: .tmp_map2
830
831.tmp_map2: .tmp_map1
832
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833endif # ifdef CONFIG_KALLSYMS
834
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200835# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
836# relevant sections renamed as per the linker script.
837quiet_cmd_vmlinux-modpost = LD $@
838 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
839 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200840 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200841define rule_vmlinux-modpost
842 :
843 +$(call cmd,vmlinux-modpost)
844 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
845 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
846endef
847
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100849vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700850ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100851 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700852endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700853ifdef CONFIG_SAMPLES
854 $(Q)$(MAKE) $(build)=samples
855endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700856ifdef CONFIG_BUILD_DOCSRC
857 $(Q)$(MAKE) $(build)=Documentation
858endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200859 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200861 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862
Sam Ravnborg310f8242008-01-21 22:57:09 +0100863# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100864ifdef CONFIG_KALLSYMS
865.tmp_vmlinux1: vmlinux.o
866endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200867
868modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
869vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200870 $(call if_changed_rule,vmlinux-modpost)
871
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872# The actual objects are generated when descending,
873# make sure no implicit rule kicks in
874$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
875
876# Handle descending into subdirectories listed in $(vmlinux-dirs)
877# Preset locale variables to speed up the build process. Limit locale
878# tweaks to this spot to avoid wrong language settings when running
879# make menuconfig etc.
880# Error messages still appears in the original language
881
Paul Smith4f193362006-03-05 17:14:10 -0500882PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200883$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 $(Q)$(MAKE) $(build)=$@
Michal Marekbc081dd2009-12-07 16:38:33 +0100885ifdef CONFIG_MODULES
886 $(Q)$(MAKE) $(modbuiltin)=$@
887endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888
Sam Ravnborgcb584552006-01-09 21:20:34 +0100889# Build the kernel release string
Sam Ravnborgcb584552006-01-09 21:20:34 +0100890#
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400891# The KERNELRELEASE value built here is stored in the file
892# include/config/kernel.release, and is used when executing several
893# make targets, such as "make install" or "make modules_install."
894#
895# The eventual kernel release string consists of the following fields,
896# shown in a hierarchical format to show how smaller parts are concatenated
897# to form the larger and final value, with values coming from places like
898# the Makefile, kernel config options, make command line options and/or
899# SCM tag information.
900#
901# $(KERNELVERSION)
902# $(VERSION) eg, 2
903# $(PATCHLEVEL) eg, 6
904# $(SUBLEVEL) eg, 18
905# $(EXTRAVERSION) eg, -rc6
906# $(localver-full)
907# $(localver)
Oleg Verych76c32952007-02-06 02:18:22 +0100908# localversion* (files without backups, containing '~')
Robert P. J. Day1ef98852006-09-12 12:38:19 -0400909# $(CONFIG_LOCALVERSION) (from kernel config setting)
910# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
911# ./scripts/setlocalversion (SCM tag, if one exists)
912# $(LOCALVERSION) (from make command line if provided)
913#
914# Note how the final $(localver-auto) string is included *only* if the
915# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
916# moment, only git is supported but other SCMs can edit the script
917# scripts/setlocalversion and add the appropriate checks as needed.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100918
Oleg Verych76c32952007-02-06 02:18:22 +0100919pattern = ".*/localversion[^~]*"
920string = $(shell cat /dev/null \
Linus Torvaldsfd19e442007-02-12 15:05:15 -0800921 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100922
Oleg Verych76c32952007-02-06 02:18:22 +0100923localver = $(subst $(space),, $(string) \
924 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200925
Sam Ravnborgcb584552006-01-09 21:20:34 +0100926# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
927# and if the SCM is know a tag from the SCM is appended.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200928# The appended tag is determined by the SCM used.
Sam Ravnborgcb584552006-01-09 21:20:34 +0100929#
Josh Huntb925dbf2009-02-12 10:16:05 -0800930# .scmversion is used when generating rpm packages so we do not loose
931# the version information from the SCM when we do the build of the kernel
932# from the copied source
Sam Ravnborgcb584552006-01-09 21:20:34 +0100933ifdef CONFIG_LOCALVERSION_AUTO
Josh Huntb925dbf2009-02-12 10:16:05 -0800934
935ifeq ($(wildcard .scmversion),)
936 _localver-auto = $(shell $(CONFIG_SHELL) \
937 $(srctree)/scripts/setlocalversion $(srctree))
938else
939 _localver-auto = $(shell cat .scmversion 2> /dev/null)
940endif
941
Sam Ravnborgcb584552006-01-09 21:20:34 +0100942 localver-auto = $(LOCALVERSION)$(_localver-auto)
943endif
944
945localver-full = $(localver)$(localver-auto)
946
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700947# Store (new) KERNELRELASE string in include/config/kernel.release
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100948kernelrelease = $(KERNELVERSION)$(localver-full)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700949include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100950 $(Q)rm -f $@
951 $(Q)echo $(kernelrelease) > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100952
953
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200955# or the modules are listed in "prepare".
956# A multi level approach is used. prepareN is processed before prepareN-1.
957# archprepare is used in arch Makefiles and when processed asm symlink,
958# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200960# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500961PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200962
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200963# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964# and if so do:
965# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700966prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500968 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700969 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 echo " $(srctree) is not clean, please run 'make mrproper'";\
971 echo " in the '$(srctree)' directory.";\
972 /bin/false; \
973 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974endif
975
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200976# prepare2 creates a makefile if using a separate output directory
977prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978
Sam Ravnborg273b2812009-10-18 00:52:28 +0200979prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200980 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200981 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200983archprepare: prepare1 scripts_basic
984
985prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200986 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200987 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200988
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800990prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992# Generate some files
993# ---------------------------------------------------------------------------
994
995# KERNELRELEASE can change from a few different places, meaning version.h
996# needs to be updated, so this check is forced on all builds
997
998uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200999define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001001 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1002 exit 1; \
1003 fi; \
1004 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005endef
1006
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001007define filechk_version.h
1008 (echo \#define LINUX_VERSION_CODE $(shell \
1009 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1010 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1011endef
1012
1013include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 $(call filechk,version.h)
1015
Sam Ravnborg273b2812009-10-18 00:52:28 +02001016include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001017 $(call filechk,utsrelease.h)
1018
Vegard Nossum179efcb2008-12-16 12:33:43 +01001019PHONY += headerdep
1020headerdep:
1021 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1022
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023# ---------------------------------------------------------------------------
1024
Paul Smith4f193362006-03-05 17:14:10 -05001025PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026depend dep:
1027 @echo '*** Warning: make $@ is unnecessary now.'
1028
1029# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001030# Firmware install
1031INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1032export INSTALL_FW_PATH
1033
1034PHONY += firmware_install
1035firmware_install: FORCE
1036 @mkdir -p $(objtree)/firmware
1037 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1038
1039# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001040# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001041
Sam Ravnborge6883b12008-06-05 16:43:46 +02001042#Default location for installed headers
1043export INSTALL_HDR_PATH = $(objtree)/usr
1044
Sam Ravnborge6883b12008-06-05 16:43:46 +02001045hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001046
1047# If we do an all arch process set dst to asm-$(hdr-arch)
1048hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001049
1050PHONY += __headers
1051__headers: include/linux/version.h scripts_basic FORCE
1052 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001053
1054PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001055headers_install_all:
1056 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001057
David Woodhouse8d730cf2006-06-18 11:58:39 +01001058PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001059headers_install: __headers
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001060 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001061 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001062 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001063 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001064
Mike Frysinger1f857122007-02-14 00:33:02 -08001065PHONY += headers_check_all
1066headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001067 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001068
David Woodhouse68475352006-06-18 12:02:10 +01001069PHONY += headers_check
1070headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001071 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001072 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001073
David Woodhouse8d730cf2006-06-18 11:58:39 +01001074# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075# Modules
1076
1077ifdef CONFIG_MODULES
1078
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001079# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080
1081all: modules
1082
1083# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001084#
1085# A module can be listed more than once in obj-m resulting in
1086# duplicate lines in modules.order files. Those are removed
1087# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088
Paul Smith4f193362006-03-05 17:14:10 -05001089PHONY += modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
Tejun Heo551559e2007-12-07 21:04:30 +09001091 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Michal Marekbc081dd2009-12-07 16:38:33 +01001092 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.builtin) > $(objtree)/modules.builtin
Mike Frysingerfd54f502008-11-06 03:31:35 -05001093 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001094 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001095 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096
1097
1098# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001099PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001100modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101
1102# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001103PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104modules_install: _modinst_ _modinst_post
1105
Paul Smith4f193362006-03-05 17:14:10 -05001106PHONY += _modinst_
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001108 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 echo "Warning: you may need to install module-init-tools"; \
1110 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1111 sleep 1; \
1112 fi
1113 @rm -rf $(MODLIB)/kernel
1114 @rm -f $(MODLIB)/source
1115 @mkdir -p $(MODLIB)/kernel
1116 @ln -s $(srctree) $(MODLIB)/source
1117 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1118 rm -f $(MODLIB)/build ; \
1119 ln -s $(objtree) $(MODLIB)/build ; \
1120 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001121 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001122 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001123 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001125# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126# boot a modules.dep even before / is mounted read-write. However the
1127# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001128PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001130 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001131 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132
1133else # CONFIG_MODULES
1134
1135# Modules not configured
1136# ---------------------------------------------------------------------------
1137
1138modules modules_install: FORCE
1139 @echo
1140 @echo "The present kernel configuration has modules disabled."
1141 @echo "Type 'make config' and enable loadable module support."
1142 @echo "Then build a kernel with module support enabled."
1143 @echo
1144 @exit 1
1145
1146endif # CONFIG_MODULES
1147
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148###
1149# Cleaning is done on three levels.
1150# make clean Delete most generated files
1151# Leave enough to build external modules
1152# make mrproper Delete the current configuration, and all generated files
1153# make distclean Remove editor backup files, patch leftover files and the like
1154
1155# Directories & files removed with 'make clean'
1156CLEAN_DIRS += $(MODVERDIR)
1157CLEAN_FILES += vmlinux System.map \
1158 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1159
1160# Directories & files removed with 'make mrproper'
Sam Ravnborg96f13042009-10-17 22:33:27 +02001161MRPROPER_DIRS += include/config usr/include include/generated
Sam Ravnborgf7f16b72009-10-18 00:00:43 +02001162MRPROPER_FILES += .config .config.old .version .old_version \
Sam Ravnborg264a2682009-10-18 00:49:24 +02001163 include/linux/version.h \
Wenji Huang8723eae2009-11-19 08:44:32 +08001164 Module.symvers tags TAGS cscope*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
1166# clean - Delete most, but leave enough to build external modules
1167#
1168clean: rm-dirs := $(CLEAN_DIRS)
1169clean: rm-files := $(CLEAN_FILES)
Randy Dunlap3794f3e2008-08-12 15:09:06 -07001170clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
Paul Smith4f193362006-03-05 17:14:10 -05001172PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173$(clean-dirs):
1174 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1175
1176clean: archclean $(clean-dirs)
1177 $(call cmd,rmdirs)
1178 $(call cmd,rmfiles)
1179 @find . $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001180 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001181 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Mathieu Desnoyersd35cb362008-07-21 14:21:38 -07001182 -o -name '*.symtypes' -o -name 'modules.order' \
Michal Marekd9bdcc72009-12-08 16:03:10 +01001183 -o -name modules.builtin -o -name '.tmp_*.o.*' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001184 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185
1186# mrproper - Delete all generated files, including .config
1187#
1188mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1189mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1190mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1191
Paul Smith4f193362006-03-05 17:14:10 -05001192PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193$(mrproper-dirs):
1194 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1195
1196mrproper: clean archmrproper $(mrproper-dirs)
1197 $(call cmd,rmdirs)
1198 $(call cmd,rmfiles)
1199
1200# distclean
1201#
Paul Smith4f193362006-03-05 17:14:10 -05001202PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
1204distclean: mrproper
1205 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001206 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001208 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1210 -type f -print | xargs rm -f
1211
1212
1213# Packaging of the kernel to various formats
1214# ---------------------------------------------------------------------------
1215# rpm target kept for backward compatibility
1216package-dir := $(srctree)/scripts/package
1217
Zach Brown031ecc62006-06-08 22:12:37 -07001218%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001219 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001220rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001221 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222
1223
1224# Brief documentation of the typical targets used
1225# ---------------------------------------------------------------------------
1226
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001227boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001229board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1230board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231
1232help:
1233 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001234 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001235 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001236 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001237 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 @echo ''
1239 @echo 'Configuration targets:'
1240 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1241 @echo ''
1242 @echo 'Other generic targets:'
1243 @echo ' all - Build all targets marked with [*]'
1244 @echo '* vmlinux - Build the bare kernel'
1245 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001246 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001247 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1248 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 @echo ' dir/ - Build all files in dir and below'
1250 @echo ' dir/file.[ois] - Build specified target only'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001251 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001252 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 @echo ' tags/TAGS - Generate tags file for editors'
1254 @echo ' cscope - Generate cscope index'
Zach Brown6d128842005-09-07 12:08:23 -07001255 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001256 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001257 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001258 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001259 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 @echo ' checkstack - Generate a list of stack hogs'
1262 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001263 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001264 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001265 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001266 @echo ' headers_check - Sanity check on exported headers'
1267 @echo ' headerdep - Detect inclusion cycles in headers'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001268 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001270 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 @echo ''
1272 @echo 'Documentation targets:'
1273 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1274 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001275 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001277 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 @echo ''
1279 @$(if $(boards), \
1280 $(foreach b, $(boards), \
1281 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1282 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001283 @$(if $(board-dirs), \
1284 $(foreach b, $(board-dirs), \
1285 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1286 printf " %-16s - Show all of the above\\n" help-boards; \
1287 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288
1289 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001290 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001292 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1293 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 @echo ''
1295 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1296 @echo 'For further info see the ./README file'
1297
1298
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001299help-board-dirs := $(addprefix help-,$(board-dirs))
1300
1301help-boards: $(help-board-dirs)
1302
1303boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1304
1305$(help-board-dirs): help-%:
1306 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1307 @$(if $(boards-per-dir), \
1308 $(foreach b, $(boards-per-dir), \
1309 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1310 echo '')
1311
1312
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313# Documentation targets
1314# ---------------------------------------------------------------------------
1315%docs: scripts_basic FORCE
1316 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1317
1318else # KBUILD_EXTMOD
1319
1320###
1321# External module support.
1322# When building external modules the kernel used as basis is considered
1323# read-only, and no consistency checks are made and the make
1324# system is not used on the basis kernel. If updates are required
1325# in the basis kernel ordinary make commands (without M=...) must
1326# be used.
1327#
1328# The following are the only valid targets when building external
1329# modules.
1330# make M=dir clean Delete all automatically generated files
1331# make M=dir modules Make all modules in specified dir
1332# make M=dir Same as 'make M=dir modules'
1333# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001334# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335# Assumes install directory is already created
1336
1337# We are always building modules
1338KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001339PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001341 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342
Paul Smith4f193362006-03-05 17:14:10 -05001343PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344$(objtree)/Module.symvers:
1345 @test -e $(objtree)/Module.symvers || ( \
1346 echo; \
1347 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1348 echo " is missing; modules will have no dependencies and modversions."; \
1349 echo )
1350
1351module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001352PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353$(module-dirs): crmodverdir $(objtree)/Module.symvers
1354 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1355
1356modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001357 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001358 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359
Paul Smith4f193362006-03-05 17:14:10 -05001360PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001361modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001362
Paul Smith4f193362006-03-05 17:14:10 -05001363install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1364PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001365_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001366 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001367 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368
Paul Smith4f193362006-03-05 17:14:10 -05001369PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001370_emodinst_post: _emodinst_
1371 $(call cmd,depmod)
1372
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1374
Paul Smith4f193362006-03-05 17:14:10 -05001375PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376$(clean-dirs):
1377 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1378
1379clean: rm-dirs := $(MODVERDIR)
Frédéric Brière0c560422009-04-19 12:58:40 -04001380clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
Michal Marekbc081dd2009-12-07 16:38:33 +01001381 $(KBUILD_EXTMOD)/modules.order \
1382 $(KBUILD_EXTMOD)/modules.builtin
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383clean: $(clean-dirs)
1384 $(call cmd,rmdirs)
Mike Frysingerc34114f2007-07-31 19:45:34 -04001385 $(call cmd,rmfiles)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001387 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -07001388 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1389 -o -name '*.gcno' \) -type f -print | xargs rm -f
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390
1391help:
1392 @echo ' Building external modules.'
1393 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1394 @echo ''
1395 @echo ' modules - default target, build the module(s)'
1396 @echo ' modules_install - install the module'
1397 @echo ' clean - remove generated files in module directory only'
1398 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001399
1400# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001401PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001402prepare: ;
1403scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404endif # KBUILD_EXTMOD
1405
1406# Generate tags for editors
1407# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001408quiet_cmd_tags = GEN $@
1409 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410
Sam Ravnborga680eed2008-12-03 22:24:13 +01001411tags TAGS cscope: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 $(call cmd,tags)
1413
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414# Scripts to check various things for consistency
1415# ---------------------------------------------------------------------------
1416
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417includecheck:
1418 find * $(RCS_FIND_IGNORE) \
1419 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001420 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421
1422versioncheck:
1423 find * $(RCS_FIND_IGNORE) \
1424 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001425 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427namespacecheck:
1428 $(PERL) $(srctree)/scripts/namespace.pl
1429
Adrian Bunk295ac052007-08-24 23:04:56 +02001430export_report:
1431 $(PERL) $(srctree)/scripts/export_report.pl
1432
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433endif #ifeq ($(config-targets),1)
1434endif #ifeq ($(mixed-targets),1)
1435
Roman Zippelc30a02e2006-06-08 22:12:50 -07001436PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001437
Jeff Dike011e3a92006-12-13 00:34:12 -08001438# UML needs a little special treatment here. It wants to use the host
1439# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1440# else wants $(ARCH), including people doing cross-builds, which means
1441# that $(SUBARCH) doesn't work here.
1442ifeq ($(ARCH), um)
1443CHECKSTACK_ARCH := $(SUBARCH)
1444else
1445CHECKSTACK_ARCH := $(ARCH)
1446endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447checkstack:
1448 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001449 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
1451kernelrelease:
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001452 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1453 $(error kernelrelease not valid - run 'make prepare' to update it))
Sam Ravnborgcb584552006-01-09 21:20:34 +01001454kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001455 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456
Sam Ravnborg06300b22006-01-25 07:13:18 +01001457# Single targets
1458# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001459# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001460# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001461# - build with separate output dir 'make O=...'
1462# - external modules
1463#
1464# target-dir => where to store outputfile
1465# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001466
Sam Ravnborg06300b22006-01-25 07:13:18 +01001467ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001468 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001469 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001470else
1471 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001472 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1473 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001474endif
1475
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001476%.s: %.c prepare scripts FORCE
1477 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1478%.i: %.c prepare scripts FORCE
1479 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1480%.o: %.c prepare scripts FORCE
1481 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1482%.lst: %.c prepare scripts FORCE
1483 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1484%.s: %.S prepare scripts FORCE
1485 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1486%.o: %.S prepare scripts FORCE
1487 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001488%.symtypes: %.c prepare scripts FORCE
1489 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001490
1491# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001492/: prepare scripts FORCE
1493 $(cmd_crmodverdir)
1494 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1495 $(build)=$(build-dir)
1496%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001497 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001498 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001499 $(build)=$(build-dir)
1500%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001501 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001502 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001503 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001504 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001505
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506# FIXME Should go into a make.lib or something
1507# ===========================================================================
1508
1509quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1510 cmd_rmdirs = rm -rf $(rm-dirs)
1511
1512quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1513 cmd_rmfiles = rm -f $(rm-files)
1514
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001515# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001516quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1517 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001518 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001519 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001520 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001521 $(KERNELRELEASE); \
1522 fi
1523
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001524# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001525# clean it up only when building all modules
1526cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1527 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528
Sam Ravnborg222d3942007-10-15 21:59:31 +02001529a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001530 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001531 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532
1533quiet_cmd_as_o_S = AS $@
1534cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1535
1536# read all saved command lines
1537
1538targets := $(wildcard $(sort $(targets)))
1539cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1540
1541ifneq ($(cmd_files),)
1542 $(cmd_files): ; # Do not try to update included dependency files
1543 include $(cmd_files)
1544endif
1545
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1547# Usage:
1548# $(Q)$(MAKE) $(clean)=dir
1549clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1550
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551endif # skip-makefile
1552
Paul Smith4f193362006-03-05 17:14:10 -05001553PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001555
Paul Smith4f193362006-03-05 17:14:10 -05001556# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001557# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001558.PHONY: $(PHONY)