blob: fe8ab312402f576159c1b7611b3cd8b218cae760 [file] [log] [blame]
Linus Torvalds55922c92011-05-29 17:43:36 -07001VERSION = 3
Linus Torvalds0d7614f2012-08-02 16:38:10 -07002PATCHLEVEL = 6
Linus Torvalds55922c92011-05-29 17:43:36 -07003SUBLEVEL = 0
Linus Torvalds0d7614f2012-08-02 16:38:10 -07004EXTRAVERSION = -rc1
Linus Torvalds1ea6b8f2011-11-07 16:16:02 -08005NAME = Saber-toothed Squirrel
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")
Sam Ravnborg28bc20d2011-04-27 22:15:27 +0200106 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
Borislav Petkov4a5838a2011-03-01 09:35:29 +0100107endif
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500110PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111_all:
112
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100113# Cancel implicit rules on top Makefile
114$(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
Chris Metcalf18aecc22011-05-04 14:38:26 -0400223# Additional ARCH settings for tile
Chris Metcalf6738d322011-05-25 15:24:00 -0400224ifeq ($(ARCH),tilepro)
225 SRCARCH := tile
226endif
Chris Metcalf18aecc22011-05-04 14:38:26 -0400227ifeq ($(ARCH),tilegx)
228 SRCARCH := tile
229endif
230
Sam Ravnborg5e538792008-12-02 23:17:12 -0800231# Where to locate arch specific headers
232hdr-arch := $(SRCARCH)
233
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700234KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500235export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237# SHELL used by kbuild
238CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
239 else if [ -x /bin/bash ]; then echo /bin/bash; \
240 else echo sh; fi ; fi)
241
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200242HOSTCC = gcc
243HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800244HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200245HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200247# Decide whether to build built-in, modular, or both.
248# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
250KBUILD_MODULES :=
251KBUILD_BUILTIN := 1
252
253# If we have only "make modules", don't compile built-in objects.
254# When we're building modules with modversions, we need to consider
255# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200256# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
258ifeq ($(MAKECMDGOALS),modules)
259 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
260endif
261
262# If we have "make <whatever> modules", compile modules
263# in addition to whatever we do anyway.
264# Just "make" or "make all" shall build modules as well
265
266ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
267 KBUILD_MODULES := 1
268endif
269
270ifeq ($(MAKECMDGOALS),)
271 KBUILD_MODULES := 1
272endif
273
Sam Ravnborge579d352005-07-27 08:10:10 +0200274export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
276
277# Beautify output
278# ---------------------------------------------------------------------------
279#
280# Normally, we echo the whole command before executing it. By making
281# that echo $($(quiet)$(cmd)), we now have the possibility to set
282# $(quiet) to choose other forms of output instead, e.g.
283#
284# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
285# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
286#
287# If $(quiet) is empty, the whole command will be printed.
288# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200289# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290# the variable $(silent_cmd_cc_o_c) doesn't exist.
291#
Adrian Bunka58a4142006-01-10 00:08:17 +0100292# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293# for commands that shall be hidden in non-verbose mode.
294#
295# $(Q)ln $@ :<
296#
297# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
298# If KBUILD_VERBOSE equals 1 then the above command is displayed.
299
300ifeq ($(KBUILD_VERBOSE),1)
301 quiet =
302 Q =
303else
304 quiet=quiet_
305 Q = @
306endif
307
308# If the user is running make -s (silent mode), suppress echoing of
309# commands
310
Jason Wessele6ac89f2012-01-05 16:46:30 -0600311ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 quiet=silent_
313endif
314
315export quiet Q KBUILD_VERBOSE
316
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317
318# Look for make include files relative to root of kernel src
319MAKEFLAGS += --include-dir=$(srctree)
320
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100321# We need some generic definitions (do not try to remake the file).
322$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800323include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
325# Make variables (CC, etc...)
326
327AS = $(CROSS_COMPILE)as
328LD = $(CROSS_COMPILE)ld
329CC = $(CROSS_COMPILE)gcc
330CPP = $(CC) -E
331AR = $(CROSS_COMPILE)ar
332NM = $(CROSS_COMPILE)nm
333STRIP = $(CROSS_COMPILE)strip
334OBJCOPY = $(CROSS_COMPILE)objcopy
335OBJDUMP = $(CROSS_COMPILE)objdump
336AWK = awk
337GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200338INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339DEPMOD = /sbin/depmod
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340PERL = perl
341CHECK = sparse
342
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100343CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
344 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200345CFLAGS_MODULE =
346AFLAGS_MODULE =
347LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348CFLAGS_KERNEL =
349AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700350CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352
353# Use LINUXINCLUDE when you must reference the include/ directory.
354# Needed to be compatible with the O= option
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200355LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include \
356 -Iarch/$(hdr-arch)/include/generated -Iinclude \
Sam Ravnborg96f13042009-10-17 22:33:27 +0200357 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Michal Marek2a11c8e2011-07-20 17:38:57 +0200358 -include $(srctree)/include/linux/kconfig.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100360KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200362KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700363 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300364 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800365 -Wno-format-security \
366 -fno-delete-null-pointer-checks
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200367KBUILD_AFLAGS_KERNEL :=
368KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200369KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200370KBUILD_AFLAGS_MODULE := -DMODULE
371KBUILD_CFLAGS_MODULE := -DMODULE
372KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700374# Read KERNELRELEASE from include/config/kernel.release (if it exists)
375KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Michal Marekcacd54e2011-05-30 13:36:07 +0200376KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100377
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200378export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100379export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200380export CPP AR NM STRIP OBJCOPY OBJDUMP
381export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200382export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Sam Ravnborg06c50402007-10-15 22:17:25 +0200384export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700385export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200386export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200387export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200388export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200389export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
391# When compiling out-of-tree modules, put MODVERDIR in the module
392# tree rather than in the kernel tree. The kernel tree might
393# even be read-only.
394export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
395
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396# Files to ignore in find ... statements
397
Jesper Juhl450c6072012-02-16 22:49:15 +0100398RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
399 -o -name .pc -o -name .hg -o -name .git \) -prune -o
400export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
401 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403# ===========================================================================
404# Rules shared between *config targets and build targets
405
406# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500407PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408scripts_basic:
409 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500410 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200412# To avoid any implicit rule to kick in, define an empty command.
413scripts/basic/%: scripts_basic ;
414
Paul Smith4f193362006-03-05 17:14:10 -0500415PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200416# outputmakefile generates a Makefile in the output directory, if using a
417# separate output directory. This allows convenient use of make in the
418# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200420ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100421 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200422 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
423 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
424endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200426# Support for using generic headers in asm-generic
427PHONY += asm-generic
428asm-generic:
429 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
430 obj=arch/$(SRCARCH)/include/generated/asm
431
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432# To make sure we do not include .config for any of the *config targets
433# catch them early, and hand them over to scripts/kconfig/Makefile
434# It is allowed to specify more targets when calling make, including
435# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200436# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437# Detect when mixed targets is specified, and make a second invocation
438# of make so .config is not included in this case either (for *config).
439
Roman Zippel3eb3c742007-01-10 14:45:28 +0100440no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800441 cscope gtags TAGS tags help %docs check% coccicheck \
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300442 include/linux/version.h headers_% archheaders archscripts \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700443 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
445config-targets := 0
446mixed-targets := 0
447dot-config := 1
448
449ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
450 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
451 dot-config := 0
452 endif
453endif
454
455ifeq ($(KBUILD_EXTMOD),)
456 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
457 config-targets := 1
458 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
459 mixed-targets := 1
460 endif
461 endif
462endif
463
464ifeq ($(mixed-targets),1)
465# ===========================================================================
466# We're called with mixed targets (*config and build targets).
467# Handle them one by one.
468
469%:: FORCE
470 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
471
472else
473ifeq ($(config-targets),1)
474# ===========================================================================
475# *config targets only - make sure prerequisites are updated, and descend
476# in scripts/kconfig to make the *config target
477
478# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
479# KBUILD_DEFCONFIG may point out an alternative default configuration
480# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200481include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400482export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100484config: scripts_basic outputmakefile FORCE
485 $(Q)mkdir -p include/linux include/config
486 $(Q)$(MAKE) $(build)=scripts/kconfig $@
487
488%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700489 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 $(Q)$(MAKE) $(build)=scripts/kconfig $@
491
492else
493# ===========================================================================
494# Build targets only - this includes vmlinux, arch specific targets, clean
495# targets and others. In general all targets except *config targets.
496
497ifeq ($(KBUILD_EXTMOD),)
498# Additional helpers built in scripts/
499# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200500# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500501PHONY += scripts
Michal Marekbc081dd2009-12-07 16:38:33 +0100502scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 $(Q)$(MAKE) $(build)=$(@)
504
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505# Objects we will link into vmlinux / subdirs we need to visit
506init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100507drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508net-y := net/
509libs-y := lib/
510core-y := usr/
511endif # KBUILD_EXTMOD
512
513ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200514# Read in config
515-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200517ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518# Read in dependencies to all Kconfig* files, make sure to run
519# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700520-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700523$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
Roman Zippelc955cca2006-06-08 22:12:39 -0700525# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100526# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200527# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100528# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100529include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
531else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200532# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200533# but do not care if they are up-to-date. Use auto.conf to trigger the test
534PHONY += include/config/auto.conf
535
536include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200537 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200538 echo >&2; \
539 echo >&2 " ERROR: Kernel configuration is invalid."; \
540 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
541 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
542 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200543 /bin/false)
544
545endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547else
548# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700549include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200550endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551
552# The all: target is the default when no target is given on the
553# command line.
554# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200555# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556all: vmlinux
557
558ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200559KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200561KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562endif
563
Paul Mundta1f42be2012-06-18 13:48:08 +0900564include $(srctree)/arch/$(SRCARCH)/Makefile
565
Andi Kleen1873e872012-03-28 11:51:18 -0700566ifdef CONFIG_READABLE_ASM
567# Disable optimizations that make assembler listings hard to read.
568# reorder blocks reorders the control in the function
569# ipa clone creates specialized cloned functions
570# partial inlining inlines only parts of functions
571KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
572 $(call cc-option,-fno-ipa-cp-clone,) \
573 $(call cc-option,-fno-partial-inlining)
574endif
575
Mike Frysinger08f67462009-06-04 16:29:08 -0700576ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100577KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
578endif
579
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100580# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900581ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100582KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900583endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100584
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400585# This warning generated too much noise in a regular build.
586# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200587KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400588
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200590KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100592# Some targets (ARM with Thumb2, for example), can't be built with frame
593# pointers. For those, we don't have FUNCTION_TRACER automatically
594# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
595# incompatible with -fomit-frame-pointer with current GCC, so we don't use
596# -fomit-frame-pointer with FUNCTION_TRACER.
597ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200598KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100600endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
602ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200603KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200604KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605endif
606
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200607ifdef CONFIG_DEBUG_INFO_REDUCED
608KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
609endif
610
Steven Rostedt606576c2008-10-06 19:06:12 -0400611ifdef CONFIG_FUNCTION_TRACER
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200612KBUILD_CFLAGS += -pg
Steven Rostedt72441cb2010-10-13 17:12:30 -0400613ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400614 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400615 BUILD_C_RECORDMCOUNT := y
616 export BUILD_C_RECORDMCOUNT
617 endif
618endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200619endif
620
Sam Ravnborg91341d42008-01-21 21:31:44 +0100621# We trigger additional mismatches with less inlining
622ifdef CONFIG_DEBUG_SECTION_MISMATCH
623KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
624endif
625
Sam Ravnborge8e69932005-04-30 16:51:42 -0700626# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700627NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700628CHECKFLAGS += $(NOSTDINC_FLAGS)
629
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200631KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200633# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200634KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400636# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700637KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700638
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700639# conserve stack if available
640KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
641
Michal Marek40df7592011-04-20 13:45:30 +0200642# use the deterministic mode of AR if available
643KBUILD_ARFLAGS := $(call ar-option,D)
644
Jason Baronbf5438fc2010-09-17 11:09:00 -0400645# check for 'asm goto'
646ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
647 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
648endif
649
Sam Ravnborg06c50402007-10-15 22:17:25 +0200650# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Ozan Çağlayan70cfe022012-08-14 19:00:54 +0300651KBUILD_CPPFLAGS += $(KCPPFLAGS)
652KBUILD_AFLAGS += $(KAFLAGS)
653KBUILD_CFLAGS += $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200654
Roland McGrath18991192007-07-19 01:48:40 -0700655# Use --build-id when available.
656LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200657 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200658KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700659LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
660
David Howells5d7d18f2009-03-04 11:59:07 -0800661ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200662LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800663endif
664
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200666# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667# set in the environment
668# Also any assignments in arch/$(ARCH)/Makefile take precedence over
669# this default value
670export KBUILD_IMAGE ?= vmlinux
671
672#
673# INSTALL_PATH specifies where to place the updated kernel and system map
674# images. Default is /boot, but you can set it to other values
675export INSTALL_PATH ?= /boot
676
677#
678# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
679# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200680# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681#
682
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100683MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684export MODLIB
685
Theodore Ts'oac031f22006-06-21 20:53:09 -0400686#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100687# INSTALL_MOD_STRIP, if defined, will cause modules to be
688# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
689# the default option --strip-debug will be used. Otherwise,
Gilles Espinasse177b2412011-01-09 08:59:49 +0100690# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100691
Theodore Ts'oac031f22006-06-21 20:53:09 -0400692ifdef INSTALL_MOD_STRIP
693ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100694mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400695else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100696mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400697endif # INSTALL_MOD_STRIP=1
698else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100699mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400700endif # INSTALL_MOD_STRIP
701export mod_strip_cmd
702
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703
704ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100705core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
707vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
708 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
709 $(net-y) $(net-m) $(libs-y) $(libs-m)))
710
711vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
712 $(init-n) $(init-) \
713 $(core-n) $(core-) $(drivers-n) $(drivers-) \
714 $(net-n) $(net-) $(libs-n) $(libs-))))
715
716init-y := $(patsubst %/, %/built-in.o, $(init-y))
717core-y := $(patsubst %/, %/built-in.o, $(core-y))
718drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
719net-y := $(patsubst %/, %/built-in.o, $(net-y))
720libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
721libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
722libs-y := $(libs-y1) $(libs-y2)
723
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200724# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200725export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
726export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
727export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200728export LDFLAGS_vmlinux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200730vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200732# Final link of vmlinux
733 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
734quiet_cmd_link-vmlinux = LINK $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200736# Include targets which we want to
737# execute if the rest of the kernel build went well.
738vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700739ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100740 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700741endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700742ifdef CONFIG_SAMPLES
743 $(Q)$(MAKE) $(build)=samples
744endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700745ifdef CONFIG_BUILD_DOCSRC
746 $(Q)$(MAKE) $(build)=Documentation
747endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200748 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200749
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750# The actual objects are generated when descending,
751# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200752$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753
754# Handle descending into subdirectories listed in $(vmlinux-dirs)
755# Preset locale variables to speed up the build process. Limit locale
756# tweaks to this spot to avoid wrong language settings when running
757# make menuconfig etc.
758# Error messages still appears in the original language
759
Paul Smith4f193362006-03-05 17:14:10 -0500760PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200761$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 $(Q)$(MAKE) $(build)=$@
763
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700764# Store (new) KERNELRELASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700765include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100766 $(Q)rm -f $@
Michal Marek7263e712010-07-05 23:43:04 +0200767 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100768
769
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200771# or the modules are listed in "prepare".
772# A multi level approach is used. prepareN is processed before prepareN-1.
773# archprepare is used in arch Makefiles and when processed asm symlink,
774# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200776# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500777PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200778
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200779# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780# and if so do:
781# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700782prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500784 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700785 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +0200786 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
787 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 /bin/false; \
789 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790endif
791
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200792# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200793prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794
Sam Ravnborg273b2812009-10-18 00:52:28 +0200795prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200796 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200797 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300799archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200800
801prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200802 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200803
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800805prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807# Generate some files
808# ---------------------------------------------------------------------------
809
810# KERNELRELEASE can change from a few different places, meaning version.h
811# needs to be updated, so this check is forced on all builds
812
813uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200814define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200816 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
817 exit 1; \
818 fi; \
819 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820endef
821
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200822define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +0100823 (echo \#define LINUX_VERSION_CODE $(shell \
824 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200825 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
826endef
827
828include/linux/version.h: $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 $(call filechk,version.h)
830
Sam Ravnborg273b2812009-10-18 00:52:28 +0200831include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200832 $(call filechk,utsrelease.h)
833
Vegard Nossum179efcb2008-12-16 12:33:43 +0100834PHONY += headerdep
835headerdep:
Peter Foley9663d982011-04-26 17:17:11 -0400836 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
837 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +0100838
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839# ---------------------------------------------------------------------------
840
Paul Smith4f193362006-03-05 17:14:10 -0500841PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842depend dep:
843 @echo '*** Warning: make $@ is unnecessary now.'
844
845# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +0300846# Firmware install
847INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
848export INSTALL_FW_PATH
849
850PHONY += firmware_install
851firmware_install: FORCE
852 @mkdir -p $(objtree)/firmware
853 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
854
855# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100856# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +0100857
Sam Ravnborge6883b12008-06-05 16:43:46 +0200858#Default location for installed headers
859export INSTALL_HDR_PATH = $(objtree)/usr
860
Sam Ravnborge6883b12008-06-05 16:43:46 +0200861hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200862
863# If we do an all arch process set dst to asm-$(hdr-arch)
864hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +0200865
H. Peter Anvin052ad272011-11-17 13:17:35 -0800866PHONY += archheaders
867archheaders:
868
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300869PHONY += archscripts
870archscripts:
871
Sam Ravnborge6883b12008-06-05 16:43:46 +0200872PHONY += __headers
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300873__headers: include/linux/version.h scripts_basic asm-generic archheaders archscripts FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -0700874 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100875
876PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200877headers_install_all:
878 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +0100879
David Woodhouse8d730cf2006-06-18 11:58:39 +0100880PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +0200881headers_install: __headers
Sam Ravnborgc95fa082009-10-17 22:47:31 +0200882 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200883 $(error Headers not exportable for the $(SRCARCH) architecture))
Sam Ravnborg88181ec2008-06-09 21:24:28 +0200884 $(Q)$(MAKE) $(hdr-inst)=include
Sam Ravnborgc95fa082009-10-17 22:47:31 +0200885 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +0100886
Mike Frysinger1f857122007-02-14 00:33:02 -0800887PHONY += headers_check_all
888headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200889 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -0800890
David Woodhouse68475352006-06-18 12:02:10 +0100891PHONY += headers_check
892headers_check: headers_install
Sam Ravnborg88181ec2008-06-09 21:24:28 +0200893 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
Sam Ravnborgc95fa082009-10-17 22:47:31 +0200894 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +0100895
David Woodhouse8d730cf2006-06-18 11:58:39 +0100896# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897# Modules
898
899ifdef CONFIG_MODULES
900
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200901# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902
Michal Marek73d13932010-03-10 12:28:58 +0100903all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904
905# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +0900906#
907# A module can be listed more than once in obj-m resulting in
908# duplicate lines in modules.order files. Those are removed
909# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910
Paul Smith4f193362006-03-05 17:14:10 -0500911PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +0200912modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +0900913 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -0500914 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200915 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -0400916 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917
Michal Mareka6c36632010-03-08 10:07:12 +0100918modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
919 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
920
Michal Marek73d13932010-03-10 12:28:58 +0100921%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +0100922 $(Q)$(MAKE) $(modbuiltin)=$*
923
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924
925# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500926PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200927modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928
929# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500930PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931modules_install: _modinst_ _modinst_post
932
Paul Smith4f193362006-03-05 17:14:10 -0500933PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +0200934_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 @rm -rf $(MODLIB)/kernel
936 @rm -f $(MODLIB)/source
937 @mkdir -p $(MODLIB)/kernel
938 @ln -s $(srctree) $(MODLIB)/source
939 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
940 rm -f $(MODLIB)/build ; \
941 ln -s $(objtree) $(MODLIB)/build ; \
942 fi
Tejun Heo551559e2007-12-07 21:04:30 +0900943 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +0100944 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200945 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
Sam Ravnborg50a8ec32007-10-18 21:24:21 +0200947# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948# boot a modules.dep even before / is mounted read-write. However the
949# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -0500950PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +0300952 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +0200953 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954
955else # CONFIG_MODULES
956
957# Modules not configured
958# ---------------------------------------------------------------------------
959
960modules modules_install: FORCE
Michal Marek5369f552012-07-07 23:04:40 +0200961 @echo >&2
962 @echo >&2 "The present kernel configuration has modules disabled."
963 @echo >&2 "Type 'make config' and enable loadable module support."
964 @echo >&2 "Then build a kernel with module support enabled."
965 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 @exit 1
967
968endif # CONFIG_MODULES
969
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970###
971# Cleaning is done on three levels.
972# make clean Delete most generated files
973# Leave enough to build external modules
974# make mrproper Delete the current configuration, and all generated files
975# make distclean Remove editor backup files, patch leftover files and the like
976
977# Directories & files removed with 'make clean'
978CLEAN_DIRS += $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979
980# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200981MRPROPER_DIRS += include/config usr/include include/generated \
982 arch/*/include/generated
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200983MRPROPER_FILES += .config .config.old .version .old_version \
Sam Ravnborg264a2682009-10-18 00:49:24 +0200984 include/linux/version.h \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800985 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
987# clean - Delete most, but leave enough to build external modules
988#
989clean: rm-dirs := $(CLEAN_DIRS)
990clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -0700991clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
Paul Smith4f193362006-03-05 17:14:10 -0500993PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994$(clean-dirs):
995 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
996
Michal Marek88d7be02010-09-06 12:00:08 +0200997clean: archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
999# mrproper - Delete all generated files, including .config
1000#
1001mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1002mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1003mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1004
Paul Smith4f193362006-03-05 17:14:10 -05001005PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006$(mrproper-dirs):
1007 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1008
1009mrproper: clean archmrproper $(mrproper-dirs)
1010 $(call cmd,rmdirs)
1011 $(call cmd,rmfiles)
1012
1013# distclean
1014#
Paul Smith4f193362006-03-05 17:14:10 -05001015PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016
1017distclean: mrproper
1018 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001019 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Michal Marekf4b129f2011-08-10 13:10:20 +02001021 -o -name '.*.rej' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1023 -type f -print | xargs rm -f
1024
1025
1026# Packaging of the kernel to various formats
1027# ---------------------------------------------------------------------------
1028# rpm target kept for backward compatibility
1029package-dir := $(srctree)/scripts/package
1030
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001031%src-pkg: FORCE
1032 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001033%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001034 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001035rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001036 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037
1038
1039# Brief documentation of the typical targets used
1040# ---------------------------------------------------------------------------
1041
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001042boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001044board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1045board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046
1047help:
1048 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001049 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001050 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001051 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001052 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 @echo ''
1054 @echo 'Configuration targets:'
1055 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1056 @echo ''
1057 @echo 'Other generic targets:'
1058 @echo ' all - Build all targets marked with [*]'
1059 @echo '* vmlinux - Build the bare kernel'
1060 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001061 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001062 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1063 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001065 @echo ' dir/file.[oisS] - Build specified target only'
1066 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1067 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001068 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001069 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 @echo ' tags/TAGS - Generate tags file for editors'
1071 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001072 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001073 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001074 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001075 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001076 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001077 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 @echo ' checkstack - Generate a list of stack hogs'
1080 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001081 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001082 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001083 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001084 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001085 @echo ' headerdep - Detect inclusion cycles in headers'
1086 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1087 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001089 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 @echo ''
1091 @echo 'Documentation targets:'
1092 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1093 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001094 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001096 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 @echo ''
1098 @$(if $(boards), \
1099 $(foreach b, $(boards), \
1100 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1101 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001102 @$(if $(board-dirs), \
1103 $(foreach b, $(board-dirs), \
1104 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1105 printf " %-16s - Show all of the above\\n" help-boards; \
1106 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107
1108 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001109 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001111 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1112 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001113 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001114 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1115 @echo ' 1: warnings which may be relevant and do not occur too often'
1116 @echo ' 2: warnings which occur quite often but may still be relevant'
1117 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001118 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 @echo ''
1120 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1121 @echo 'For further info see the ./README file'
1122
1123
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001124help-board-dirs := $(addprefix help-,$(board-dirs))
1125
1126help-boards: $(help-board-dirs)
1127
1128boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1129
1130$(help-board-dirs): help-%:
1131 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1132 @$(if $(boards-per-dir), \
1133 $(foreach b, $(boards-per-dir), \
1134 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1135 echo '')
1136
1137
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138# Documentation targets
1139# ---------------------------------------------------------------------------
1140%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001141 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1143
1144else # KBUILD_EXTMOD
1145
1146###
1147# External module support.
1148# When building external modules the kernel used as basis is considered
1149# read-only, and no consistency checks are made and the make
1150# system is not used on the basis kernel. If updates are required
1151# in the basis kernel ordinary make commands (without M=...) must
1152# be used.
1153#
1154# The following are the only valid targets when building external
1155# modules.
1156# make M=dir clean Delete all automatically generated files
1157# make M=dir modules Make all modules in specified dir
1158# make M=dir Same as 'make M=dir modules'
1159# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001160# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161# Assumes install directory is already created
1162
1163# We are always building modules
1164KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001165PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001167 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
Paul Smith4f193362006-03-05 17:14:10 -05001169PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170$(objtree)/Module.symvers:
1171 @test -e $(objtree)/Module.symvers || ( \
1172 echo; \
1173 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1174 echo " is missing; modules will have no dependencies and modversions."; \
1175 echo )
1176
1177module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001178PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179$(module-dirs): crmodverdir $(objtree)/Module.symvers
1180 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1181
1182modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001183 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001184 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185
Paul Smith4f193362006-03-05 17:14:10 -05001186PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001187modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001188
Paul Smith4f193362006-03-05 17:14:10 -05001189install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1190PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001191_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001192 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001193 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
Paul Smith4f193362006-03-05 17:14:10 -05001195PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001196_emodinst_post: _emodinst_
1197 $(call cmd,depmod)
1198
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1200
Paul Smith4f193362006-03-05 17:14:10 -05001201PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202$(clean-dirs):
1203 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1204
1205clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001206clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
1208help:
1209 @echo ' Building external modules.'
1210 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1211 @echo ''
1212 @echo ' modules - default target, build the module(s)'
1213 @echo ' modules_install - install the module'
1214 @echo ' clean - remove generated files in module directory only'
1215 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001216
1217# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001218PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001219prepare: ;
1220scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221endif # KBUILD_EXTMOD
1222
Michal Marek88d7be02010-09-06 12:00:08 +02001223clean: $(clean-dirs)
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +02001224 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
Michal Marek88d7be02010-09-06 12:00:08 +02001225 $(call cmd,rmdirs)
1226 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001227 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001228 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1229 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1230 -o -name '*.symtypes' -o -name 'modules.order' \
1231 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1232 -o -name '*.gcno' \) -type f -print | xargs rm -f
1233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234# Generate tags for editors
1235# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001236quiet_cmd_tags = GEN $@
1237 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001239tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 $(call cmd,tags)
1241
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242# Scripts to check various things for consistency
1243# ---------------------------------------------------------------------------
1244
Peter Foley279f3dd2011-04-26 17:15:01 -04001245PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1246
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001248 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001250 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251
1252versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001253 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001255 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256
Nicolas Palix74425ee2010-06-06 17:15:01 +02001257coccicheck:
1258 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1259
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260namespacecheck:
1261 $(PERL) $(srctree)/scripts/namespace.pl
1262
Adrian Bunk295ac052007-08-24 23:04:56 +02001263export_report:
1264 $(PERL) $(srctree)/scripts/export_report.pl
1265
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266endif #ifeq ($(config-targets),1)
1267endif #ifeq ($(mixed-targets),1)
1268
Roman Zippelc30a02e2006-06-08 22:12:50 -07001269PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001270
Jeff Dike011e3a92006-12-13 00:34:12 -08001271# UML needs a little special treatment here. It wants to use the host
1272# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1273# else wants $(ARCH), including people doing cross-builds, which means
1274# that $(SUBARCH) doesn't work here.
1275ifeq ($(ARCH), um)
1276CHECKSTACK_ARCH := $(SUBARCH)
1277else
1278CHECKSTACK_ARCH := $(ARCH)
1279endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280checkstack:
1281 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001282 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001284kernelrelease:
1285 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001286
Sam Ravnborgcb584552006-01-09 21:20:34 +01001287kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001288 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289
Borislav Petkovea01fa92012-04-11 18:36:18 +02001290# Clear a bunch of variables before executing the submake
1291tools/: FORCE
1292 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/
1293
1294tools/%: FORCE
1295 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/ $*
1296
Sam Ravnborg06300b22006-01-25 07:13:18 +01001297# Single targets
1298# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001299# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001300# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001301# - build with separate output dir 'make O=...'
1302# - external modules
1303#
1304# target-dir => where to store outputfile
1305# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001306
Sam Ravnborg06300b22006-01-25 07:13:18 +01001307ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001308 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001309 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001310else
1311 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001312 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1313 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001314endif
1315
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001316%.s: %.c prepare scripts FORCE
1317 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1318%.i: %.c prepare scripts FORCE
1319 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1320%.o: %.c prepare scripts FORCE
1321 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1322%.lst: %.c prepare scripts FORCE
1323 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1324%.s: %.S prepare scripts FORCE
1325 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1326%.o: %.S prepare scripts FORCE
1327 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001328%.symtypes: %.c prepare scripts FORCE
1329 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001330
1331# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001332/: prepare scripts FORCE
1333 $(cmd_crmodverdir)
1334 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1335 $(build)=$(build-dir)
1336%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001337 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001338 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001339 $(build)=$(build-dir)
1340%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001341 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001342 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001343 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001344 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001345
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346# FIXME Should go into a make.lib or something
1347# ===========================================================================
1348
1349quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1350 cmd_rmdirs = rm -rf $(rm-dirs)
1351
1352quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1353 cmd_rmfiles = rm -f $(rm-files)
1354
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001355# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001356quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001357 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1358 $(KERNELRELEASE)
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001359
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001360# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001361# clean it up only when building all modules
1362cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1363 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365# read all saved command lines
1366
1367targets := $(wildcard $(sort $(targets)))
1368cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1369
1370ifneq ($(cmd_files),)
1371 $(cmd_files): ; # Do not try to update included dependency files
1372 include $(cmd_files)
1373endif
1374
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1376# Usage:
1377# $(Q)$(MAKE) $(clean)=dir
1378clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1379
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380endif # skip-makefile
1381
Paul Smith4f193362006-03-05 17:14:10 -05001382PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001384
Paul Smith4f193362006-03-05 17:14:10 -05001385# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001386# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001387.PHONY: $(PHONY)