blob: 7d4e9c8da7295e628d8a7849b72e1d8651d8772c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001VERSION = 2
2PATCHLEVEL = 6
Linus Torvaldsc56eb8f2011-01-18 15:14:02 -08003SUBLEVEL = 38
Linus Torvalds521cb402011-03-14 18:20:32 -07004EXTRAVERSION =
Linus Torvaldscd072022010-10-14 16:26:43 -07005NAME = Flesh-Eating Bats with Fangs
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 := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103endif
104
Borislav Petkov4a5838a2011-03-01 09:35:29 +0100105ifeq ("$(origin W)", "command line")
106 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := 1
107endif
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500110PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111_all:
112
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100113# Cancel implicit rules on top Makefile
114$(CURDIR)/Makefile Makefile: ;
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116ifneq ($(KBUILD_OUTPUT),)
117# Invoke a second make in the output directory, passing relevant variables
118# check that the output directory actually exists
119saved-output := $(KBUILD_OUTPUT)
120KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
121$(if $(KBUILD_OUTPUT),, \
122 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Milton Miller0b357862007-09-21 18:09:02 -0500124PHONY += $(MAKECMDGOALS) sub-make
125
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100126$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Milton Miller0b357862007-09-21 18:09:02 -0500127 $(Q)@:
128
129sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200130 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
131 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500132 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
133 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135# Leave processing to above invocation of make
136skip-makefile := 1
137endif # ifneq ($(KBUILD_OUTPUT),)
138endif # ifeq ($(KBUILD_SRC),)
139
140# We process the rest of the Makefile if this is the final invocation of make
141ifeq ($(skip-makefile),)
142
143# If building an external module we do not care about the all: rule
144# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500145PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146ifeq ($(KBUILD_EXTMOD),)
147_all: all
148else
149_all: modules
150endif
151
152srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153objtree := $(CURDIR)
154src := $(srctree)
155obj := $(objtree)
156
Mattia Dongili0f558c32006-02-19 13:50:37 +0100157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Amerigo Wang11294232009-06-19 03:40:26 -0400159export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162# SUBARCH tells the usermode build what the underlying arch is. That is set
163# first, and if a usermode build is happening, the "ARCH=um" on the command
164# line overrides the setting of ARCH below. If a native build is happening,
165# then ARCH is assigned, getting whatever value it gets normally, and
166# SUBARCH is subsequently ignored.
167
168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Paul Mundt3cc000b2009-04-11 08:39:27 +0900172 -e s/sh[234].*/sh/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174# Cross compiling and selecting different set of gcc/bin-utils
175# ---------------------------------------------------------------------------
176#
177# When performing cross compilation for other architectures ARCH shall be set
178# to the target architecture. (See arch/* for the possibilities).
179# ARCH can be set during invocation of make:
180# make ARCH=ia64
181# Another way is to have ARCH set in the environment.
182# The default ARCH is the host where make is executed.
183
184# CROSS_COMPILE specify the prefix used for all executables used
185# during compilation. Only gcc and related bin-utils executables
186# are prefixed with $(CROSS_COMPILE).
187# CROSS_COMPILE can be set on the command line
188# make CROSS_COMPILE=ia64-linux-
189# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800190# A third alternative is to store a setting in .config so that plain
191# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192# Default value for CROSS_COMPILE is not to prefix executables
193# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg4ce6efe2008-03-23 21:38:54 +0100194export KBUILD_BUILDHOST := $(SUBARCH)
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200195ARCH ?= $(SUBARCH)
Roland McGrath84336462009-12-21 16:24:06 -0800196CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200199UTS_MACHINE := $(ARCH)
200SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
Sam Ravnborgd746d642007-11-12 20:14:19 +0100202# Additional ARCH settings for x86
203ifeq ($(ARCH),i386)
204 SRCARCH := x86
205endif
206ifeq ($(ARCH),x86_64)
207 SRCARCH := x86
208endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200209
Sam Ravnborg5e538792008-12-02 23:17:12 -0800210# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000211ifeq ($(ARCH),sparc32)
212 SRCARCH := sparc
213endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200214ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800215 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200216endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200217
Paul Mundt3cc000b2009-04-11 08:39:27 +0900218# Additional ARCH settings for sh
219ifeq ($(ARCH),sh64)
220 SRCARCH := sh
221endif
222
Sam Ravnborg5e538792008-12-02 23:17:12 -0800223# Where to locate arch specific headers
224hdr-arch := $(SRCARCH)
225
Sam Ravnborg49148022009-01-16 21:58:10 +1000226ifeq ($(ARCH),m68knommu)
227 hdr-arch := m68k
228endif
229
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700230KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500231export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233# SHELL used by kbuild
234CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
235 else if [ -x /bin/bash ]; then echo /bin/bash; \
236 else echo sh; fi ; fi)
237
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200238HOSTCC = gcc
239HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800240HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200241HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200243# Decide whether to build built-in, modular, or both.
244# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245
246KBUILD_MODULES :=
247KBUILD_BUILTIN := 1
248
249# If we have only "make modules", don't compile built-in objects.
250# When we're building modules with modversions, we need to consider
251# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200252# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
254ifeq ($(MAKECMDGOALS),modules)
255 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
256endif
257
258# If we have "make <whatever> modules", compile modules
259# in addition to whatever we do anyway.
260# Just "make" or "make all" shall build modules as well
261
262ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
263 KBUILD_MODULES := 1
264endif
265
266ifeq ($(MAKECMDGOALS),)
267 KBUILD_MODULES := 1
268endif
269
Sam Ravnborge579d352005-07-27 08:10:10 +0200270export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
272
273# Beautify output
274# ---------------------------------------------------------------------------
275#
276# Normally, we echo the whole command before executing it. By making
277# that echo $($(quiet)$(cmd)), we now have the possibility to set
278# $(quiet) to choose other forms of output instead, e.g.
279#
280# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
281# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
282#
283# If $(quiet) is empty, the whole command will be printed.
284# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200285# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286# the variable $(silent_cmd_cc_o_c) doesn't exist.
287#
Adrian Bunka58a4142006-01-10 00:08:17 +0100288# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289# for commands that shall be hidden in non-verbose mode.
290#
291# $(Q)ln $@ :<
292#
293# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
294# If KBUILD_VERBOSE equals 1 then the above command is displayed.
295
296ifeq ($(KBUILD_VERBOSE),1)
297 quiet =
298 Q =
299else
300 quiet=quiet_
301 Q = @
302endif
303
304# If the user is running make -s (silent mode), suppress echoing of
305# commands
306
307ifneq ($(findstring s,$(MAKEFLAGS)),)
308 quiet=silent_
309endif
310
311export quiet Q KBUILD_VERBOSE
312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
314# Look for make include files relative to root of kernel src
315MAKEFLAGS += --include-dir=$(srctree)
316
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100317# We need some generic definitions (do not try to remake the file).
318$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800319include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321# Make variables (CC, etc...)
322
323AS = $(CROSS_COMPILE)as
324LD = $(CROSS_COMPILE)ld
325CC = $(CROSS_COMPILE)gcc
326CPP = $(CC) -E
327AR = $(CROSS_COMPILE)ar
328NM = $(CROSS_COMPILE)nm
329STRIP = $(CROSS_COMPILE)strip
330OBJCOPY = $(CROSS_COMPILE)objcopy
331OBJDUMP = $(CROSS_COMPILE)objdump
332AWK = awk
333GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200334INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335DEPMOD = /sbin/depmod
336KALLSYMS = scripts/kallsyms
337PERL = perl
338CHECK = sparse
339
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100340CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
341 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200342CFLAGS_MODULE =
343AFLAGS_MODULE =
344LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345CFLAGS_KERNEL =
346AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700347CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
349
350# Use LINUXINCLUDE when you must reference the include/ directory.
351# Needed to be compatible with the O= option
Sam Ravnborg24a675e2009-10-17 21:14:18 +0200352LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
Sam Ravnborg96f13042009-10-17 22:33:27 +0200353 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200354 -include include/generated/autoconf.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100356KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200358KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700359 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300360 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800361 -Wno-format-security \
362 -fno-delete-null-pointer-checks
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200363KBUILD_AFLAGS_KERNEL :=
364KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200365KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200366KBUILD_AFLAGS_MODULE := -DMODULE
367KBUILD_CFLAGS_MODULE := -DMODULE
368KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700370# Read KERNELRELEASE from include/config/kernel.release (if it exists)
371KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100372KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100373
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200374export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100375export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200376export CPP AR NM STRIP OBJCOPY OBJDUMP
377export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200378export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
Sam Ravnborg06c50402007-10-15 22:17:25 +0200380export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700381export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200382export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200383export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200384export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386# When compiling out-of-tree modules, put MODVERDIR in the module
387# tree rather than in the kernel tree. The kernel tree might
388# even be read-only.
389export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
390
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391# Files to ignore in find ... statements
392
Trond Myklebust406119f2005-10-27 14:46:53 -0400393RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
394export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
396# ===========================================================================
397# Rules shared between *config targets and build targets
398
399# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500400PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401scripts_basic:
402 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500403 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200405# To avoid any implicit rule to kick in, define an empty command.
406scripts/basic/%: scripts_basic ;
407
Paul Smith4f193362006-03-05 17:14:10 -0500408PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200409# outputmakefile generates a Makefile in the output directory, if using a
410# separate output directory. This allows convenient use of make in the
411# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200413ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100414 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200415 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
416 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
417endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
419# To make sure we do not include .config for any of the *config targets
420# catch them early, and hand them over to scripts/kconfig/Makefile
421# It is allowed to specify more targets when calling make, including
422# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200423# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424# Detect when mixed targets is specified, and make a second invocation
425# of make so .config is not included in this case either (for *config).
426
Roman Zippel3eb3c742007-01-10 14:45:28 +0100427no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800428 cscope gtags TAGS tags help %docs check% coccicheck \
Roman Zippel3eb3c742007-01-10 14:45:28 +0100429 include/linux/version.h headers_% \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700430 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432config-targets := 0
433mixed-targets := 0
434dot-config := 1
435
436ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
437 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
438 dot-config := 0
439 endif
440endif
441
442ifeq ($(KBUILD_EXTMOD),)
443 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
444 config-targets := 1
445 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
446 mixed-targets := 1
447 endif
448 endif
449endif
450
451ifeq ($(mixed-targets),1)
452# ===========================================================================
453# We're called with mixed targets (*config and build targets).
454# Handle them one by one.
455
456%:: FORCE
457 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
458
459else
460ifeq ($(config-targets),1)
461# ===========================================================================
462# *config targets only - make sure prerequisites are updated, and descend
463# in scripts/kconfig to make the *config target
464
465# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
466# KBUILD_DEFCONFIG may point out an alternative default configuration
467# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200468include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400469export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100471config: scripts_basic outputmakefile FORCE
472 $(Q)mkdir -p include/linux include/config
473 $(Q)$(MAKE) $(build)=scripts/kconfig $@
474
475%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700476 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 $(Q)$(MAKE) $(build)=scripts/kconfig $@
478
479else
480# ===========================================================================
481# Build targets only - this includes vmlinux, arch specific targets, clean
482# targets and others. In general all targets except *config targets.
483
484ifeq ($(KBUILD_EXTMOD),)
485# Additional helpers built in scripts/
486# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200487# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500488PHONY += scripts
Michal Marekbc081dd2009-12-07 16:38:33 +0100489scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 $(Q)$(MAKE) $(build)=$(@)
491
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492# Objects we will link into vmlinux / subdirs we need to visit
493init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100494drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495net-y := net/
496libs-y := lib/
497core-y := usr/
498endif # KBUILD_EXTMOD
499
500ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200501# Read in config
502-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200504ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505# Read in dependencies to all Kconfig* files, make sure to run
506# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700507-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700510$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
Roman Zippelc955cca2006-06-08 22:12:39 -0700512# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100513# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200514# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100515# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100516include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
518else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200519# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200520# but do not care if they are up-to-date. Use auto.conf to trigger the test
521PHONY += include/config/auto.conf
522
523include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200524 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200525 echo; \
526 echo " ERROR: Kernel configuration is invalid."; \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200527 echo " include/generated/autoconf.h or $@ are missing.";\
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200528 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
529 echo; \
530 /bin/false)
531
532endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700533
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534else
535# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700536include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200537endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
539# The all: target is the default when no target is given on the
540# command line.
541# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200542# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543all: vmlinux
544
545ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200546KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200548KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549endif
550
Ralf Baechlebef5b542008-07-16 13:02:24 +0100551include $(srctree)/arch/$(SRCARCH)/Makefile
552
Mike Frysinger08f67462009-06-04 16:29:08 -0700553ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100554KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
555endif
556
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100557# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900558ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100559KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900560endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200563KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100565# Some targets (ARM with Thumb2, for example), can't be built with frame
566# pointers. For those, we don't have FUNCTION_TRACER automatically
567# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
568# incompatible with -fomit-frame-pointer with current GCC, so we don't use
569# -fomit-frame-pointer with FUNCTION_TRACER.
570ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200571KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100573endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
575ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200576KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200577KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578endif
579
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200580ifdef CONFIG_DEBUG_INFO_REDUCED
581KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
582endif
583
Steven Rostedt606576c2008-10-06 19:06:12 -0400584ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200585KBUILD_CFLAGS += -pg
Steven Rostedt72441cb2010-10-13 17:12:30 -0400586ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400587 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400588 BUILD_C_RECORDMCOUNT := y
589 export BUILD_C_RECORDMCOUNT
590 endif
591endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200592endif
593
Sam Ravnborg91341d42008-01-21 21:31:44 +0100594# We trigger additional mismatches with less inlining
595ifdef CONFIG_DEBUG_SECTION_MISMATCH
596KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
597endif
598
Sam Ravnborge8e69932005-04-30 16:51:42 -0700599# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb2005-05-16 21:53:46 -0700600NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700601CHECKFLAGS += $(NOSTDINC_FLAGS)
602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200604KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200606# disable pointer signed / unsigned warnings in gcc 4.0
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200607KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400609# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700610KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700611
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700612# conserve stack if available
613KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
614
Jason Baronbf5438fc2010-09-17 11:09:00 -0400615# check for 'asm goto'
616ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
617 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
618endif
619
Sam Ravnborg06c50402007-10-15 22:17:25 +0200620# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Sam Ravnborg69ee0b32007-11-04 19:00:46 +0100621# But warn user when we do so
622warn-assign = \
623$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
624
625ifneq ($(KCPPFLAGS),)
626 $(call warn-assign,CPPFLAGS)
627 KBUILD_CPPFLAGS += $(KCPPFLAGS)
628endif
629ifneq ($(KAFLAGS),)
630 $(call warn-assign,AFLAGS)
631 KBUILD_AFLAGS += $(KAFLAGS)
632endif
633ifneq ($(KCFLAGS),)
634 $(call warn-assign,CFLAGS)
635 KBUILD_CFLAGS += $(KCFLAGS)
636endif
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200637
Roland McGrath18991192007-07-19 01:48:40 -0700638# Use --build-id when available.
639LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200640 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200641KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700642LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
643
David Howells5d7d18f2009-03-04 11:59:07 -0800644ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200645LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800646endif
647
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200649# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650# set in the environment
651# Also any assignments in arch/$(ARCH)/Makefile take precedence over
652# this default value
653export KBUILD_IMAGE ?= vmlinux
654
655#
656# INSTALL_PATH specifies where to place the updated kernel and system map
657# images. Default is /boot, but you can set it to other values
658export INSTALL_PATH ?= /boot
659
660#
661# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
662# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200663# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664#
665
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100666MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667export MODLIB
668
Theodore Ts'oac031f22006-06-21 20:53:09 -0400669#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100670# INSTALL_MOD_STRIP, if defined, will cause modules to be
671# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
672# the default option --strip-debug will be used. Otherwise,
Gilles Espinasse177b2412011-01-09 08:59:49 +0100673# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100674
Theodore Ts'oac031f22006-06-21 20:53:09 -0400675ifdef INSTALL_MOD_STRIP
676ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100677mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400678else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100679mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400680endif # INSTALL_MOD_STRIP=1
681else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100682mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400683endif # INSTALL_MOD_STRIP
684export mod_strip_cmd
685
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
687ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100688core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
690vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
691 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
692 $(net-y) $(net-m) $(libs-y) $(libs-m)))
693
694vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
695 $(init-n) $(init-) \
696 $(core-n) $(core-) $(drivers-n) $(drivers-) \
697 $(net-n) $(net-) $(libs-n) $(libs-))))
698
699init-y := $(patsubst %/, %/built-in.o, $(init-y))
700core-y := $(patsubst %/, %/built-in.o, $(core-y))
701drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
702net-y := $(patsubst %/, %/built-in.o, $(net-y))
703libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
704libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
705libs-y := $(libs-y1) $(libs-y2)
706
707# Build vmlinux
708# ---------------------------------------------------------------------------
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200709# vmlinux is built from the objects selected by $(vmlinux-init) and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710# $(vmlinux-main). Most are built-in.o files from top-level directories
Uwe Zeisberger24625662006-10-05 16:24:45 +0200711# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712# Ordering when linking is important, and $(vmlinux-init) must be first.
713#
714# vmlinux
715# ^
716# |
717# +-< $(vmlinux-init)
718# | +--< init/version.o + more
719# |
720# +--< $(vmlinux-main)
721# | +--< driver/built-in.o mm/built-in.o + more
722# |
723# +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
724#
725# vmlinux version (uname -v) cannot be updated during normal
726# descending-into-subdirs phase since we do not yet know if we need to
727# update vmlinux.
728# Therefore this step is delayed until just before final link of vmlinux -
729# except in the kallsyms case where it is done just before adding the
730# symbols to the kernel.
731#
732# System.map is generated to document addresses of all kernel symbols
733
734vmlinux-init := $(head-y) $(init-y)
735vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
736vmlinux-all := $(vmlinux-init) $(vmlinux-main)
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200737vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg85bd2fd2007-02-26 15:33:52 +0100738export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
740# Rule to link vmlinux - also used during CONFIG_KALLSYMS
741# May be overridden by arch/$(ARCH)/Makefile
742quiet_cmd_vmlinux__ ?= LD $@
743 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
744 -T $(vmlinux-lds) $(vmlinux-init) \
745 --start-group $(vmlinux-main) --end-group \
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200746 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747
748# Generate new vmlinux version
749quiet_cmd_vmlinux_version = GEN .version
750 cmd_vmlinux_version = set -e; \
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200751 if [ ! -r .version ]; then \
752 rm -f .version; \
753 echo 1 >.version; \
754 else \
755 mv .version .old_version; \
756 expr 0$$(cat .old_version) + 1 >.version; \
757 fi; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 $(MAKE) $(build)=init
759
760# Generate System.map
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200761quiet_cmd_sysmap = SYSMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
763
764# Link of vmlinux
765# If CONFIG_KALLSYMS is set .version is already updated
766# Generate System.map and verify that the content is consistent
Mark Rustad39ca3712005-10-17 16:43:34 -0700767# Use + in front of the vmlinux_version rule to silent warning with make -j2
768# First command is ':' to allow us to use + in front of the rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769define rule_vmlinux__
Mark Rustad39ca3712005-10-17 16:43:34 -0700770 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
772
773 $(call cmd,vmlinux__)
774 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
775
Sam Ravnborg46352812006-08-08 21:41:18 +0200776 $(Q)$(if $($(quiet)cmd_sysmap), \
777 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
778 $(cmd_sysmap) $@ System.map; \
779 if [ $$? -ne 0 ]; then \
780 rm -f $@; \
781 /bin/false; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 fi;
783 $(verify_kallsyms)
784endef
785
786
787ifdef CONFIG_KALLSYMS
788# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
789# It's a three stage process:
790# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
791# empty
792# Running kallsyms on that gives us .tmp_kallsyms1.o with
793# the right size - vmlinux version (uname -v) is updated during this step
794# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
795# but due to the added section, some addresses have shifted.
796# From here, we generate a correct .tmp_kallsyms2.o
797# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
798# o Verify that the System.map from vmlinux matches the map from
799# .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
800# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
801# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
802# temporary bypass to allow the kernel to be built while the
803# maintainers work out what went wrong with kallsyms.
804
805ifdef CONFIG_KALLSYMS_EXTRA_PASS
806last_kallsyms := 3
807else
808last_kallsyms := 2
809endif
810
811kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
812
813define verify_kallsyms
Sam Ravnborg46352812006-08-08 21:41:18 +0200814 $(Q)$(if $($(quiet)cmd_sysmap), \
815 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
Sam Ravnborg46352812006-08-08 21:41:18 +0200817 $(Q)cmp -s System.map .tmp_System.map || \
818 (echo Inconsistent kallsyms data; \
819 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 rm .tmp_kallsyms* ; /bin/false )
821endef
822
823# Update vmlinux version before link
824# Use + in front of this rule to silent warning about make -j1
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200825# First command is ':' to allow us to use + in front of this rule
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826cmd_ksym_ld = $(cmd_vmlinux__)
827define rule_ksym_ld
Sam Ravnborg72ba47c2005-07-27 11:39:37 +0200828 :
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 +$(call cmd,vmlinux_version)
830 $(call cmd,vmlinux__)
831 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
832endef
833
834# Generate .S file with all kernel symbols
835quiet_cmd_kallsyms = KSYM $@
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100836 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
837 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100839.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 $(call if_changed_dep,as_o_S)
841
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100842.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 $(call cmd,kallsyms)
844
845# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100846.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
847 $(call if_changed_rule,ksym_ld)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100849.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
850 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100852.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
853 $(call if_changed,vmlinux__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
855# Needs to visit scripts/ before $(KALLSYMS) can be used.
856$(KALLSYMS): scripts ;
857
Sam Ravnborg33bc25e2005-07-14 20:19:08 +0000858# Generate some data for debugging strange kallsyms problems
859debug_kallsyms: .tmp_map$(last_kallsyms)
860
861.tmp_map%: .tmp_vmlinux% FORCE
862 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
863
864.tmp_map3: .tmp_map2
865
866.tmp_map2: .tmp_map1
867
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868endif # ifdef CONFIG_KALLSYMS
869
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200870# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
871# relevant sections renamed as per the linker script.
872quiet_cmd_vmlinux-modpost = LD $@
873 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
874 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200875 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200876define rule_vmlinux-modpost
877 :
878 +$(call cmd,vmlinux-modpost)
879 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
880 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
881endef
882
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883# vmlinux image - including updated kernel symbols
Sam Ravnborg310f8242008-01-21 22:57:09 +0100884vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
David Woodhouse0f836e52006-10-11 01:21:43 -0700885ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100886 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e52006-10-11 01:21:43 -0700887endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700888ifdef CONFIG_SAMPLES
889 $(Q)$(MAKE) $(build)=samples
890endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700891ifdef CONFIG_BUILD_DOCSRC
892 $(Q)$(MAKE) $(build)=Documentation
893endif
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200894 $(call vmlinux-modpost)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 $(call if_changed_rule,vmlinux__)
Jan Beulich4e25d8b2005-09-08 17:07:35 +0200896 $(Q)rm -f .old_version
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897
Sam Ravnborg310f8242008-01-21 22:57:09 +0100898# build vmlinux.o first to catch section mismatch errors early
Sam Ravnborgcf87dcd2008-02-13 22:50:24 +0100899ifdef CONFIG_KALLSYMS
900.tmp_vmlinux1: vmlinux.o
901endif
Sam Ravnborg90ebd872008-05-01 19:31:35 +0200902
903modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
904vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200905 $(call if_changed_rule,vmlinux-modpost)
906
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907# The actual objects are generated when descending,
908# make sure no implicit rule kicks in
909$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
910
911# Handle descending into subdirectories listed in $(vmlinux-dirs)
912# Preset locale variables to speed up the build process. Limit locale
913# tweaks to this spot to avoid wrong language settings when running
914# make menuconfig etc.
915# Error messages still appears in the original language
916
Paul Smith4f193362006-03-05 17:14:10 -0500917PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200918$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 $(Q)$(MAKE) $(build)=$@
920
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700921# Store (new) KERNELRELASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700922include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100923 $(Q)rm -f $@
Michal Marek7263e712010-07-05 23:43:04 +0200924 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100925
926
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200928# or the modules are listed in "prepare".
929# A multi level approach is used. prepareN is processed before prepareN-1.
930# archprepare is used in arch Makefiles and when processed asm symlink,
931# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200933# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500934PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200935
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200936# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937# and if so do:
938# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700939prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500941 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700942 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 echo " $(srctree) is not clean, please run 'make mrproper'";\
944 echo " in the '$(srctree)' directory.";\
945 /bin/false; \
946 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947endif
948
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200949# prepare2 creates a makefile if using a separate output directory
950prepare2: prepare3 outputmakefile
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951
Sam Ravnborg273b2812009-10-18 00:52:28 +0200952prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200953 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200954 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200956archprepare: prepare1 scripts_basic
957
958prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200959 $(Q)$(MAKE) $(build)=.
Sam Ravnborgc53aeca2007-03-27 22:50:29 +0200960 $(Q)$(MAKE) $(build)=. missing-syscalls
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200961
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800963prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965# Generate some files
966# ---------------------------------------------------------------------------
967
968# KERNELRELEASE can change from a few different places, meaning version.h
969# needs to be updated, so this check is forced on all builds
970
971uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200972define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200974 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
975 exit 1; \
976 fi; \
977 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978endef
979
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200980define filechk_version.h
981 (echo \#define LINUX_VERSION_CODE $(shell \
982 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
983 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
984endef
985
986include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 $(call filechk,version.h)
988
Sam Ravnborg273b2812009-10-18 00:52:28 +0200989include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200990 $(call filechk,utsrelease.h)
991
Vegard Nossum179efcb2008-12-16 12:33:43 +0100992PHONY += headerdep
993headerdep:
994 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
995
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996# ---------------------------------------------------------------------------
997
Paul Smith4f193362006-03-05 17:14:10 -0500998PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999depend dep:
1000 @echo '*** Warning: make $@ is unnecessary now.'
1001
1002# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001003# Firmware install
1004INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1005export INSTALL_FW_PATH
1006
1007PHONY += firmware_install
1008firmware_install: FORCE
1009 @mkdir -p $(objtree)/firmware
1010 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1011
1012# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001013# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001014
Sam Ravnborge6883b12008-06-05 16:43:46 +02001015#Default location for installed headers
1016export INSTALL_HDR_PATH = $(objtree)/usr
1017
Sam Ravnborge6883b12008-06-05 16:43:46 +02001018hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001019
1020# If we do an all arch process set dst to asm-$(hdr-arch)
1021hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001022
1023PHONY += __headers
1024__headers: include/linux/version.h scripts_basic FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -07001025 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001026
1027PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001028headers_install_all:
1029 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001030
David Woodhouse8d730cf2006-06-18 11:58:39 +01001031PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001032headers_install: __headers
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001033 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001034 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001035 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001036 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001037
Mike Frysinger1f857122007-02-14 00:33:02 -08001038PHONY += headers_check_all
1039headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001040 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001041
David Woodhouse68475352006-06-18 12:02:10 +01001042PHONY += headers_check
1043headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +02001044 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborgc95fa082009-10-17 22:47:31 +02001045 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001046
David Woodhouse8d730cf2006-06-18 11:58:39 +01001047# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048# Modules
1049
1050ifdef CONFIG_MODULES
1051
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001052# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053
Michal Marek73d13932010-03-10 12:28:58 +01001054all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055
1056# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001057#
1058# A module can be listed more than once in obj-m resulting in
1059# duplicate lines in modules.order files. Those are removed
1060# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
Paul Smith4f193362006-03-05 17:14:10 -05001062PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001063modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001064 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001065 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001066 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001067 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
Michal Mareka6c36632010-03-08 10:07:12 +01001069modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1070 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1071
Michal Marek73d13932010-03-10 12:28:58 +01001072%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001073 $(Q)$(MAKE) $(modbuiltin)=$*
1074
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075
1076# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001077PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001078modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079
1080# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001081PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082modules_install: _modinst_ _modinst_post
1083
Paul Smith4f193362006-03-05 17:14:10 -05001084PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001085_modinst_:
Tom Rinice454d42005-07-15 07:56:36 -07001086 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 echo "Warning: you may need to install module-init-tools"; \
1088 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1089 sleep 1; \
1090 fi
1091 @rm -rf $(MODLIB)/kernel
1092 @rm -f $(MODLIB)/source
1093 @mkdir -p $(MODLIB)/kernel
1094 @ln -s $(srctree) $(MODLIB)/source
1095 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1096 rm -f $(MODLIB)/build ; \
1097 ln -s $(objtree) $(MODLIB)/build ; \
1098 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001099 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001100 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001101 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001103# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104# boot a modules.dep even before / is mounted read-write. However the
1105# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001106PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001108 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001109 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
1111else # CONFIG_MODULES
1112
1113# Modules not configured
1114# ---------------------------------------------------------------------------
1115
1116modules modules_install: FORCE
1117 @echo
1118 @echo "The present kernel configuration has modules disabled."
1119 @echo "Type 'make config' and enable loadable module support."
1120 @echo "Then build a kernel with module support enabled."
1121 @echo
1122 @exit 1
1123
1124endif # CONFIG_MODULES
1125
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126###
1127# Cleaning is done on three levels.
1128# make clean Delete most generated files
1129# Leave enough to build external modules
1130# make mrproper Delete the current configuration, and all generated files
1131# make distclean Remove editor backup files, patch leftover files and the like
1132
1133# Directories & files removed with 'make clean'
1134CLEAN_DIRS += $(MODVERDIR)
1135CLEAN_FILES += vmlinux System.map \
1136 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1137
1138# Directories & files removed with 'make mrproper'
Sam Ravnborg96f13042009-10-17 22:33:27 +02001139MRPROPER_DIRS += include/config usr/include include/generated
Sam Ravnborgf7f16b72009-10-18 00:00:43 +02001140MRPROPER_FILES += .config .config.old .version .old_version \
Sam Ravnborg264a2682009-10-18 00:49:24 +02001141 include/linux/version.h \
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001142 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143
1144# clean - Delete most, but leave enough to build external modules
1145#
1146clean: rm-dirs := $(CLEAN_DIRS)
1147clean: rm-files := $(CLEAN_FILES)
Michal Marekc47f2142010-09-03 15:00:22 +02001148clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149
Paul Smith4f193362006-03-05 17:14:10 -05001150PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151$(clean-dirs):
1152 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1153
Michal Marek88d7be02010-09-06 12:00:08 +02001154clean: archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155
1156# mrproper - Delete all generated files, including .config
1157#
1158mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1159mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1160mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1161
Paul Smith4f193362006-03-05 17:14:10 -05001162PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163$(mrproper-dirs):
1164 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1165
1166mrproper: clean archmrproper $(mrproper-dirs)
1167 $(call cmd,rmdirs)
1168 $(call cmd,rmfiles)
1169
1170# distclean
1171#
Paul Smith4f193362006-03-05 17:14:10 -05001172PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173
1174distclean: mrproper
1175 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001176 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001178 -o -name '.*.rej' -o -size 0 \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1180 -type f -print | xargs rm -f
1181
1182
1183# Packaging of the kernel to various formats
1184# ---------------------------------------------------------------------------
1185# rpm target kept for backward compatibility
1186package-dir := $(srctree)/scripts/package
1187
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001188%src-pkg: FORCE
1189 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001190%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001191 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001192rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001193 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
1195
1196# Brief documentation of the typical targets used
1197# ---------------------------------------------------------------------------
1198
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001199boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001201board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1202board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
1204help:
1205 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001206 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001207 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001208 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001209 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 @echo ''
1211 @echo 'Configuration targets:'
1212 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1213 @echo ''
1214 @echo 'Other generic targets:'
1215 @echo ' all - Build all targets marked with [*]'
1216 @echo '* vmlinux - Build the bare kernel'
1217 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001218 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001219 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1220 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001222 @echo ' dir/file.[oisS] - Build specified target only'
1223 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1224 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001225 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001226 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 @echo ' tags/TAGS - Generate tags file for editors'
1228 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001229 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001230 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001231 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001232 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001233 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001234 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 @echo ' checkstack - Generate a list of stack hogs'
1237 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001238 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001239 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001240 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001241 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001242 @echo ' headerdep - Detect inclusion cycles in headers'
1243 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1244 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001246 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 @echo ''
1248 @echo 'Documentation targets:'
1249 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1250 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001251 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001253 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 @echo ''
1255 @$(if $(boards), \
1256 $(foreach b, $(boards), \
1257 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1258 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001259 @$(if $(board-dirs), \
1260 $(foreach b, $(board-dirs), \
1261 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1262 printf " %-16s - Show all of the above\\n" help-boards; \
1263 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264
1265 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001266 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001268 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1269 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Borislav Petkov4a5838a2011-03-01 09:35:29 +01001270 @echo ' make W=1 [targets] Enable extra gcc checks'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271 @echo ''
1272 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1273 @echo 'For further info see the ./README file'
1274
1275
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001276help-board-dirs := $(addprefix help-,$(board-dirs))
1277
1278help-boards: $(help-board-dirs)
1279
1280boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1281
1282$(help-board-dirs): help-%:
1283 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1284 @$(if $(boards-per-dir), \
1285 $(foreach b, $(boards-per-dir), \
1286 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1287 echo '')
1288
1289
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290# Documentation targets
1291# ---------------------------------------------------------------------------
1292%docs: scripts_basic FORCE
1293 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1294
1295else # KBUILD_EXTMOD
1296
1297###
1298# External module support.
1299# When building external modules the kernel used as basis is considered
1300# read-only, and no consistency checks are made and the make
1301# system is not used on the basis kernel. If updates are required
1302# in the basis kernel ordinary make commands (without M=...) must
1303# be used.
1304#
1305# The following are the only valid targets when building external
1306# modules.
1307# make M=dir clean Delete all automatically generated files
1308# make M=dir modules Make all modules in specified dir
1309# make M=dir Same as 'make M=dir modules'
1310# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001311# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312# Assumes install directory is already created
1313
1314# We are always building modules
1315KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001316PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001318 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319
Paul Smith4f193362006-03-05 17:14:10 -05001320PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321$(objtree)/Module.symvers:
1322 @test -e $(objtree)/Module.symvers || ( \
1323 echo; \
1324 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1325 echo " is missing; modules will have no dependencies and modversions."; \
1326 echo )
1327
1328module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001329PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330$(module-dirs): crmodverdir $(objtree)/Module.symvers
1331 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1332
1333modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001334 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001335 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336
Paul Smith4f193362006-03-05 17:14:10 -05001337PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001338modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001339
Paul Smith4f193362006-03-05 17:14:10 -05001340install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1341PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001342_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001343 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001344 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
Paul Smith4f193362006-03-05 17:14:10 -05001346PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001347_emodinst_post: _emodinst_
1348 $(call cmd,depmod)
1349
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1351
Paul Smith4f193362006-03-05 17:14:10 -05001352PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353$(clean-dirs):
1354 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1355
1356clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001357clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358
1359help:
1360 @echo ' Building external modules.'
1361 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1362 @echo ''
1363 @echo ' modules - default target, build the module(s)'
1364 @echo ' modules_install - install the module'
1365 @echo ' clean - remove generated files in module directory only'
1366 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001367
1368# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001369PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001370prepare: ;
1371scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372endif # KBUILD_EXTMOD
1373
Michal Marek88d7be02010-09-06 12:00:08 +02001374clean: $(clean-dirs)
1375 $(call cmd,rmdirs)
1376 $(call cmd,rmfiles)
1377 @find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1378 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1379 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1380 -o -name '*.symtypes' -o -name 'modules.order' \
1381 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1382 -o -name '*.gcno' \) -type f -print | xargs rm -f
1383
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384# Generate tags for editors
1385# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001386quiet_cmd_tags = GEN $@
1387 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001389tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 $(call cmd,tags)
1391
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392# Scripts to check various things for consistency
1393# ---------------------------------------------------------------------------
1394
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395includecheck:
1396 find * $(RCS_FIND_IGNORE) \
1397 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001398 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399
1400versioncheck:
1401 find * $(RCS_FIND_IGNORE) \
1402 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001403 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404
Nicolas Palix74425ee2010-06-06 17:15:01 +02001405coccicheck:
1406 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1407
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408namespacecheck:
1409 $(PERL) $(srctree)/scripts/namespace.pl
1410
Adrian Bunk295ac052007-08-24 23:04:56 +02001411export_report:
1412 $(PERL) $(srctree)/scripts/export_report.pl
1413
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414endif #ifeq ($(config-targets),1)
1415endif #ifeq ($(mixed-targets),1)
1416
Roman Zippelc30a02e2006-06-08 22:12:50 -07001417PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001418
Jeff Dike011e3a92006-12-13 00:34:12 -08001419# UML needs a little special treatment here. It wants to use the host
1420# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1421# else wants $(ARCH), including people doing cross-builds, which means
1422# that $(SUBARCH) doesn't work here.
1423ifeq ($(ARCH), um)
1424CHECKSTACK_ARCH := $(SUBARCH)
1425else
1426CHECKSTACK_ARCH := $(ARCH)
1427endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428checkstack:
1429 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001430 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001432kernelrelease:
1433 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001434
Sam Ravnborgcb584552006-01-09 21:20:34 +01001435kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001436 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437
Sam Ravnborg06300b22006-01-25 07:13:18 +01001438# Single targets
1439# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001440# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001441# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001442# - build with separate output dir 'make O=...'
1443# - external modules
1444#
1445# target-dir => where to store outputfile
1446# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001447
Sam Ravnborg06300b22006-01-25 07:13:18 +01001448ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001449 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001450 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001451else
1452 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001453 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1454 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001455endif
1456
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001457%.s: %.c prepare scripts FORCE
1458 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1459%.i: %.c prepare scripts FORCE
1460 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1461%.o: %.c prepare scripts FORCE
1462 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1463%.lst: %.c prepare scripts FORCE
1464 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1465%.s: %.S prepare scripts FORCE
1466 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1467%.o: %.S prepare scripts FORCE
1468 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001469%.symtypes: %.c prepare scripts FORCE
1470 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001471
1472# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001473/: prepare scripts FORCE
1474 $(cmd_crmodverdir)
1475 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1476 $(build)=$(build-dir)
1477%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001478 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001479 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001480 $(build)=$(build-dir)
1481%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001482 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001483 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001484 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001485 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001486
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487# FIXME Should go into a make.lib or something
1488# ===========================================================================
1489
1490quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1491 cmd_rmdirs = rm -rf $(rm-dirs)
1492
1493quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1494 cmd_rmfiles = rm -f $(rm-files)
1495
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001496# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001497quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1498 cmd_depmod = \
Sam Ravnborgd8d2e782007-10-22 11:30:45 +02001499 if [ -r System.map -a -x $(DEPMOD) ]; then \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001500 $(DEPMOD) -ae -F System.map \
Gilles Espinasse75bccd82009-03-07 13:57:25 +01001501 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001502 $(KERNELRELEASE); \
1503 fi
1504
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001505# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001506# clean it up only when building all modules
1507cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1508 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509
Sam Ravnborg222d3942007-10-15 21:59:31 +02001510a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
Sam Ravnborg80c00ba2010-07-28 19:11:27 +02001511 $(KBUILD_AFLAGS_KERNEL) \
Sam Ravnborgd8672b42008-11-21 21:50:02 +01001512 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
Sam Ravnborg5e8d7802006-07-01 09:58:02 +02001513 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514
1515quiet_cmd_as_o_S = AS $@
1516cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1517
1518# read all saved command lines
1519
1520targets := $(wildcard $(sort $(targets)))
1521cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1522
1523ifneq ($(cmd_files),)
1524 $(cmd_files): ; # Do not try to update included dependency files
1525 include $(cmd_files)
1526endif
1527
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1529# Usage:
1530# $(Q)$(MAKE) $(clean)=dir
1531clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1532
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533endif # skip-makefile
1534
Paul Smith4f193362006-03-05 17:14:10 -05001535PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001537
Paul Smith4f193362006-03-05 17:14:10 -05001538# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001539# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001540.PHONY: $(PHONY)