blob: 5be2ee8c90e4247b90ec1aed9421492226d5f7f8 [file] [log] [blame]
Linus Torvalds55922c92011-05-29 17:43:36 -07001VERSION = 3
Linus Torvaldsddffeb82012-10-14 14:41:04 -07002PATCHLEVEL = 7
Linus Torvalds55922c92011-05-29 17:43:36 -07003SUBLEVEL = 0
Linus Torvaldsddffeb82012-10-14 14:41:04 -07004EXTRAVERSION = -rc1
Linus Torvalds979570e2012-09-23 18:10:57 -07005NAME = Terrified Chipmunk
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 $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200345CFLAGS_MODULE =
346AFLAGS_MODULE =
347LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348CFLAGS_KERNEL =
349AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700350CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352
David Howellsabbf1592012-10-02 18:01:26 +0100353# Use USERINCLUDE when you must reference the UAPI directories only.
354USERINCLUDE := \
355 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
356 -Iarch/$(hdr-arch)/include/generated/uapi \
357 -I$(srctree)/include/uapi \
358 -Iinclude/generated/uapi \
359 -include $(srctree)/include/linux/kconfig.h
360
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361# Use LINUXINCLUDE when you must reference the include/ directory.
362# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100363LINUXINCLUDE := \
364 -I$(srctree)/arch/$(hdr-arch)/include \
365 -Iarch/$(hdr-arch)/include/generated \
366 $(if $(KBUILD_SRC), -I$(srctree)/include) \
367 -Iinclude \
368 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100370KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200372KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700373 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300374 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800375 -Wno-format-security \
376 -fno-delete-null-pointer-checks
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200377KBUILD_AFLAGS_KERNEL :=
378KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200379KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200380KBUILD_AFLAGS_MODULE := -DMODULE
381KBUILD_CFLAGS_MODULE := -DMODULE
382KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700384# Read KERNELRELEASE from include/config/kernel.release (if it exists)
385KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Michal Marekcacd54e2011-05-30 13:36:07 +0200386KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100387
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200388export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100389export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200390export CPP AR NM STRIP OBJCOPY OBJDUMP
391export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200392export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393
Sam Ravnborg06c50402007-10-15 22:17:25 +0200394export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700395export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200396export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200397export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200398export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200399export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
401# When compiling out-of-tree modules, put MODVERDIR in the module
402# tree rather than in the kernel tree. The kernel tree might
403# even be read-only.
404export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406# Files to ignore in find ... statements
407
Jesper Juhl450c6072012-02-16 22:49:15 +0100408RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
409 -o -name .pc -o -name .hg -o -name .git \) -prune -o
410export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
411 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
413# ===========================================================================
414# Rules shared between *config targets and build targets
415
416# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500417PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418scripts_basic:
419 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500420 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200422# To avoid any implicit rule to kick in, define an empty command.
423scripts/basic/%: scripts_basic ;
424
Paul Smith4f193362006-03-05 17:14:10 -0500425PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200426# outputmakefile generates a Makefile in the output directory, if using a
427# separate output directory. This allows convenient use of make in the
428# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200430ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100431 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200432 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
433 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
434endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200436# Support for using generic headers in asm-generic
437PHONY += asm-generic
438asm-generic:
439 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
440 obj=arch/$(SRCARCH)/include/generated/asm
441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442# To make sure we do not include .config for any of the *config targets
443# catch them early, and hand them over to scripts/kconfig/Makefile
444# It is allowed to specify more targets when calling make, including
445# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200446# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447# Detect when mixed targets is specified, and make a second invocation
448# of make so .config is not included in this case either (for *config).
449
David Howells10b63952012-10-02 18:01:57 +0100450version_h := include/generated/uapi/linux/version.h
David Howellsd183e6f2012-10-02 18:01:56 +0100451
Roman Zippel3eb3c742007-01-10 14:45:28 +0100452no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800453 cscope gtags TAGS tags help %docs check% coccicheck \
David Howellsd183e6f2012-10-02 18:01:56 +0100454 $(version_h) headers_% archheaders archscripts \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700455 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457config-targets := 0
458mixed-targets := 0
459dot-config := 1
460
461ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
462 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
463 dot-config := 0
464 endif
465endif
466
467ifeq ($(KBUILD_EXTMOD),)
468 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
469 config-targets := 1
470 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
471 mixed-targets := 1
472 endif
473 endif
474endif
475
476ifeq ($(mixed-targets),1)
477# ===========================================================================
478# We're called with mixed targets (*config and build targets).
479# Handle them one by one.
480
481%:: FORCE
482 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
483
484else
485ifeq ($(config-targets),1)
486# ===========================================================================
487# *config targets only - make sure prerequisites are updated, and descend
488# in scripts/kconfig to make the *config target
489
490# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
491# KBUILD_DEFCONFIG may point out an alternative default configuration
492# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200493include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400494export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100496config: scripts_basic outputmakefile FORCE
497 $(Q)mkdir -p include/linux include/config
498 $(Q)$(MAKE) $(build)=scripts/kconfig $@
499
500%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700501 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 $(Q)$(MAKE) $(build)=scripts/kconfig $@
503
504else
505# ===========================================================================
506# Build targets only - this includes vmlinux, arch specific targets, clean
507# targets and others. In general all targets except *config targets.
508
509ifeq ($(KBUILD_EXTMOD),)
510# Additional helpers built in scripts/
511# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200512# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500513PHONY += scripts
Michal Marekbc081dd2009-12-07 16:38:33 +0100514scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 $(Q)$(MAKE) $(build)=$(@)
516
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517# Objects we will link into vmlinux / subdirs we need to visit
518init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100519drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520net-y := net/
521libs-y := lib/
522core-y := usr/
523endif # KBUILD_EXTMOD
524
525ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200526# Read in config
527-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200529ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530# Read in dependencies to all Kconfig* files, make sure to run
531# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700532-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700535$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
Roman Zippelc955cca2006-06-08 22:12:39 -0700537# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100538# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200539# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100540# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100541include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
543else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200544# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200545# but do not care if they are up-to-date. Use auto.conf to trigger the test
546PHONY += include/config/auto.conf
547
548include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200549 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200550 echo >&2; \
551 echo >&2 " ERROR: Kernel configuration is invalid."; \
552 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
553 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
554 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200555 /bin/false)
556
557endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700558
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559else
560# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700561include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200562endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
564# The all: target is the default when no target is given on the
565# command line.
566# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200567# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568all: vmlinux
569
570ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200571KBUILD_CFLAGS += -Os
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200573KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574endif
575
Paul Mundta1f42be2012-06-18 13:48:08 +0900576include $(srctree)/arch/$(SRCARCH)/Makefile
577
Andi Kleen1873e872012-03-28 11:51:18 -0700578ifdef CONFIG_READABLE_ASM
579# Disable optimizations that make assembler listings hard to read.
580# reorder blocks reorders the control in the function
581# ipa clone creates specialized cloned functions
582# partial inlining inlines only parts of functions
583KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
584 $(call cc-option,-fno-ipa-cp-clone,) \
585 $(call cc-option,-fno-partial-inlining)
586endif
587
Mike Frysinger08f67462009-06-04 16:29:08 -0700588ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100589KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
590endif
591
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100592# Force gcc to behave correct even for buggy distributions
Tejun Heo5d707e92009-02-09 22:17:39 +0900593ifndef CONFIG_CC_STACKPROTECTOR
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100594KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900595endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100596
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400597# This warning generated too much noise in a regular build.
598# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200599KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400600
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200602KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100604# Some targets (ARM with Thumb2, for example), can't be built with frame
605# pointers. For those, we don't have FUNCTION_TRACER automatically
606# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
607# incompatible with -fomit-frame-pointer with current GCC, so we don't use
608# -fomit-frame-pointer with FUNCTION_TRACER.
609ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200610KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100612endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
614ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200615KBUILD_CFLAGS += -g
Sam Ravnborg222d3942007-10-15 21:59:31 +0200616KBUILD_AFLAGS += -gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617endif
618
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200619ifdef CONFIG_DEBUG_INFO_REDUCED
620KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly)
621endif
622
Steven Rostedt606576c2008-10-06 19:06:12 -0400623ifdef CONFIG_FUNCTION_TRACER
Steven Rostedta2546fa2011-02-09 13:15:59 -0500624ifdef CONFIG_HAVE_FENTRY
625CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
626endif
627KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
628KBUILD_AFLAGS += $(CC_USING_FENTRY)
Steven Rostedt72441cb2010-10-13 17:12:30 -0400629ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400630 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400631 BUILD_C_RECORDMCOUNT := y
632 export BUILD_C_RECORDMCOUNT
633 endif
634endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200635endif
636
Sam Ravnborg91341d42008-01-21 21:31:44 +0100637# We trigger additional mismatches with less inlining
638ifdef CONFIG_DEBUG_SECTION_MISMATCH
639KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
640endif
641
Sam Ravnborge8e69932005-04-30 16:51:42 -0700642# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700643NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700644CHECKFLAGS += $(NOSTDINC_FLAGS)
645
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200647KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200649# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200650KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400652# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700653KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700654
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700655# conserve stack if available
656KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
657
Michal Marek40df7592011-04-20 13:45:30 +0200658# use the deterministic mode of AR if available
659KBUILD_ARFLAGS := $(call ar-option,D)
660
Jason Baronbf5438fc2010-09-17 11:09:00 -0400661# check for 'asm goto'
662ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
663 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
664endif
665
Sam Ravnborg06c50402007-10-15 22:17:25 +0200666# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Ozan Çağlayan70cfe022012-08-14 19:00:54 +0300667KBUILD_CPPFLAGS += $(KCPPFLAGS)
668KBUILD_AFLAGS += $(KAFLAGS)
669KBUILD_CFLAGS += $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200670
Roland McGrath18991192007-07-19 01:48:40 -0700671# Use --build-id when available.
672LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200673 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200674KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700675LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
676
David Howells5d7d18f2009-03-04 11:59:07 -0800677ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200678LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800679endif
680
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200682# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683# set in the environment
684# Also any assignments in arch/$(ARCH)/Makefile take precedence over
685# this default value
686export KBUILD_IMAGE ?= vmlinux
687
688#
689# INSTALL_PATH specifies where to place the updated kernel and system map
690# images. Default is /boot, but you can set it to other values
691export INSTALL_PATH ?= /boot
692
693#
694# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
695# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200696# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697#
698
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100699MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700export MODLIB
701
Theodore Ts'oac031f22006-06-21 20:53:09 -0400702#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100703# INSTALL_MOD_STRIP, if defined, will cause modules to be
704# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
705# the default option --strip-debug will be used. Otherwise,
Gilles Espinasse177b2412011-01-09 08:59:49 +0100706# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100707
Theodore Ts'oac031f22006-06-21 20:53:09 -0400708ifdef INSTALL_MOD_STRIP
709ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100710mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400711else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100712mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400713endif # INSTALL_MOD_STRIP=1
714else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100715mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400716endif # INSTALL_MOD_STRIP
717export mod_strip_cmd
718
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
720ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100721core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722
723vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
724 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
725 $(net-y) $(net-m) $(libs-y) $(libs-m)))
726
727vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
728 $(init-n) $(init-) \
729 $(core-n) $(core-) $(drivers-n) $(drivers-) \
730 $(net-n) $(net-) $(libs-n) $(libs-))))
731
732init-y := $(patsubst %/, %/built-in.o, $(init-y))
733core-y := $(patsubst %/, %/built-in.o, $(core-y))
734drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
735net-y := $(patsubst %/, %/built-in.o, $(net-y))
736libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
737libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
738libs-y := $(libs-y1) $(libs-y2)
739
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200740# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200741export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
742export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
743export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200744export LDFLAGS_vmlinux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200746vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200748# Final link of vmlinux
749 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
750quiet_cmd_link-vmlinux = LINK $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200752# Include targets which we want to
753# execute if the rest of the kernel build went well.
754vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700755ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100756 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700757endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700758ifdef CONFIG_SAMPLES
759 $(Q)$(MAKE) $(build)=samples
760endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700761ifdef CONFIG_BUILD_DOCSRC
762 $(Q)$(MAKE) $(build)=Documentation
763endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200764 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200765
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766# The actual objects are generated when descending,
767# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200768$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769
770# Handle descending into subdirectories listed in $(vmlinux-dirs)
771# Preset locale variables to speed up the build process. Limit locale
772# tweaks to this spot to avoid wrong language settings when running
773# make menuconfig etc.
774# Error messages still appears in the original language
775
Paul Smith4f193362006-03-05 17:14:10 -0500776PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200777$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 $(Q)$(MAKE) $(build)=$@
779
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700780# Store (new) KERNELRELASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700781include/config/kernel.release: include/config/auto.conf FORCE
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100782 $(Q)rm -f $@
Michal Marek7263e712010-07-05 23:43:04 +0200783 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
Sam Ravnborgcb584552006-01-09 21:20:34 +0100784
785
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200787# or the modules are listed in "prepare".
788# A multi level approach is used. prepareN is processed before prepareN-1.
789# archprepare is used in arch Makefiles and when processed asm symlink,
790# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200792# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500793PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200794
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200795# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796# and if so do:
797# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700798prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500800 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700801 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +0200802 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
803 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 /bin/false; \
805 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806endif
807
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200808# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200809prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
David Howellsd183e6f2012-10-02 18:01:56 +0100811prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200812 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200813 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300815archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200816
817prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200818 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200819
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800821prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823# Generate some files
824# ---------------------------------------------------------------------------
825
826# KERNELRELEASE can change from a few different places, meaning version.h
827# needs to be updated, so this check is forced on all builds
828
829uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200830define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200832 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
833 exit 1; \
834 fi; \
835 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836endef
837
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200838define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +0100839 (echo \#define LINUX_VERSION_CODE $(shell \
840 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200841 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
842endef
843
David Howellsd183e6f2012-10-02 18:01:56 +0100844$(version_h): $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 $(call filechk,version.h)
846
Sam Ravnborg273b2812009-10-18 00:52:28 +0200847include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200848 $(call filechk,utsrelease.h)
849
Vegard Nossum179efcb2008-12-16 12:33:43 +0100850PHONY += headerdep
851headerdep:
Peter Foley9663d982011-04-26 17:17:11 -0400852 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
853 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +0100854
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855# ---------------------------------------------------------------------------
856
Paul Smith4f193362006-03-05 17:14:10 -0500857PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858depend dep:
859 @echo '*** Warning: make $@ is unnecessary now.'
860
861# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +0300862# Firmware install
863INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
864export INSTALL_FW_PATH
865
866PHONY += firmware_install
867firmware_install: FORCE
868 @mkdir -p $(objtree)/firmware
869 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
870
871# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100872# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +0100873
Sam Ravnborge6883b12008-06-05 16:43:46 +0200874#Default location for installed headers
875export INSTALL_HDR_PATH = $(objtree)/usr
876
Sam Ravnborge6883b12008-06-05 16:43:46 +0200877hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200878
879# If we do an all arch process set dst to asm-$(hdr-arch)
880hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +0200881
H. Peter Anvin052ad272011-11-17 13:17:35 -0800882PHONY += archheaders
883archheaders:
884
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300885PHONY += archscripts
886archscripts:
887
Sam Ravnborge6883b12008-06-05 16:43:46 +0200888PHONY += __headers
David Howellsd183e6f2012-10-02 18:01:56 +0100889__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -0700890 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100891
892PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200893headers_install_all:
894 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +0100895
David Woodhouse8d730cf2006-06-18 11:58:39 +0100896PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +0200897headers_install: __headers
David Howells10b63952012-10-02 18:01:57 +0100898 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
899 $(error Headers not exportable for the $(SRCARCH) architecture))
900 $(Q)$(MAKE) $(hdr-inst)=include/uapi
901 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +0100902
Mike Frysinger1f857122007-02-14 00:33:02 -0800903PHONY += headers_check_all
904headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200905 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -0800906
David Woodhouse68475352006-06-18 12:02:10 +0100907PHONY += headers_check
908headers_check: headers_install
David Howells10b63952012-10-02 18:01:57 +0100909 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
910 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +0100911
David Woodhouse8d730cf2006-06-18 11:58:39 +0100912# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913# Modules
914
915ifdef CONFIG_MODULES
916
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200917# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
Michal Marek73d13932010-03-10 12:28:58 +0100919all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920
921# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +0900922#
923# A module can be listed more than once in obj-m resulting in
924# duplicate lines in modules.order files. Those are removed
925# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926
Paul Smith4f193362006-03-05 17:14:10 -0500927PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +0200928modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +0900929 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -0500930 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200931 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -0400932 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933
Michal Mareka6c36632010-03-08 10:07:12 +0100934modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
935 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
936
Michal Marek73d13932010-03-10 12:28:58 +0100937%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +0100938 $(Q)$(MAKE) $(modbuiltin)=$*
939
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940
941# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -0500942PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200943modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
945# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -0500946PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947modules_install: _modinst_ _modinst_post
948
Paul Smith4f193362006-03-05 17:14:10 -0500949PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +0200950_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 @rm -rf $(MODLIB)/kernel
952 @rm -f $(MODLIB)/source
953 @mkdir -p $(MODLIB)/kernel
954 @ln -s $(srctree) $(MODLIB)/source
955 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
956 rm -f $(MODLIB)/build ; \
957 ln -s $(objtree) $(MODLIB)/build ; \
958 fi
Tejun Heo551559e2007-12-07 21:04:30 +0900959 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +0100960 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200961 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962
Sam Ravnborg50a8ec32007-10-18 21:24:21 +0200963# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964# boot a modules.dep even before / is mounted read-write. However the
965# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -0500966PHONY += _modinst_post
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +0300968 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +0200969 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970
971else # CONFIG_MODULES
972
973# Modules not configured
974# ---------------------------------------------------------------------------
975
976modules modules_install: FORCE
Michal Marek5369f552012-07-07 23:04:40 +0200977 @echo >&2
978 @echo >&2 "The present kernel configuration has modules disabled."
979 @echo >&2 "Type 'make config' and enable loadable module support."
980 @echo >&2 "Then build a kernel with module support enabled."
981 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 @exit 1
983
984endif # CONFIG_MODULES
985
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986###
987# Cleaning is done on three levels.
988# make clean Delete most generated files
989# Leave enough to build external modules
990# make mrproper Delete the current configuration, and all generated files
991# make distclean Remove editor backup files, patch leftover files and the like
992
993# Directories & files removed with 'make clean'
994CLEAN_DIRS += $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995
996# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200997MRPROPER_DIRS += include/config usr/include include/generated \
998 arch/*/include/generated
David Howellsd183e6f2012-10-02 18:01:56 +0100999MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
Rusty Russelld5b71932012-10-02 14:35:24 +09301000 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1001 signing_key.priv signing_key.x509 x509.genkey \
1002 extra_certificates signing_key.x509.keyid \
1003 signing_key.x509.signer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
1005# clean - Delete most, but leave enough to build external modules
1006#
1007clean: rm-dirs := $(CLEAN_DIRS)
1008clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -07001009clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010
Paul Smith4f193362006-03-05 17:14:10 -05001011PHONY += $(clean-dirs) clean archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012$(clean-dirs):
1013 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1014
Michal Marek88d7be02010-09-06 12:00:08 +02001015clean: archclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016
1017# mrproper - Delete all generated files, including .config
1018#
1019mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1020mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1021mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1022
Paul Smith4f193362006-03-05 17:14:10 -05001023PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024$(mrproper-dirs):
1025 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1026
1027mrproper: clean archmrproper $(mrproper-dirs)
1028 $(call cmd,rmdirs)
1029 $(call cmd,rmfiles)
1030
1031# distclean
1032#
Paul Smith4f193362006-03-05 17:14:10 -05001033PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034
1035distclean: mrproper
1036 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001037 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Michal Marekf4b129f2011-08-10 13:10:20 +02001039 -o -name '.*.rej' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1041 -type f -print | xargs rm -f
1042
1043
1044# Packaging of the kernel to various formats
1045# ---------------------------------------------------------------------------
1046# rpm target kept for backward compatibility
1047package-dir := $(srctree)/scripts/package
1048
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001049%src-pkg: FORCE
1050 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001051%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001052 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001053rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001054 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055
1056
1057# Brief documentation of the typical targets used
1058# ---------------------------------------------------------------------------
1059
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001060boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001062board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1063board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064
1065help:
1066 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001067 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001068 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001069 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001070 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 @echo ''
1072 @echo 'Configuration targets:'
1073 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1074 @echo ''
1075 @echo 'Other generic targets:'
1076 @echo ' all - Build all targets marked with [*]'
1077 @echo '* vmlinux - Build the bare kernel'
1078 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001079 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001080 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1081 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001083 @echo ' dir/file.[oisS] - Build specified target only'
1084 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1085 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001086 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001087 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 @echo ' tags/TAGS - Generate tags file for editors'
1089 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001090 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001091 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001092 @echo ' kernelversion - Output the version stored in Makefile'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001093 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001094 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001095 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 @echo ' checkstack - Generate a list of stack hogs'
1098 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001099 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001100 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001101 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001102 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001103 @echo ' headerdep - Detect inclusion cycles in headers'
1104 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1105 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001107 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 @echo ''
1109 @echo 'Documentation targets:'
1110 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1111 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001112 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001114 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 @echo ''
1116 @$(if $(boards), \
1117 $(foreach b, $(boards), \
1118 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1119 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001120 @$(if $(board-dirs), \
1121 $(foreach b, $(board-dirs), \
1122 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1123 printf " %-16s - Show all of the above\\n" help-boards; \
1124 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125
1126 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001127 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001129 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1130 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001131 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001132 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1133 @echo ' 1: warnings which may be relevant and do not occur too often'
1134 @echo ' 2: warnings which occur quite often but may still be relevant'
1135 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001136 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 @echo ''
1138 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1139 @echo 'For further info see the ./README file'
1140
1141
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001142help-board-dirs := $(addprefix help-,$(board-dirs))
1143
1144help-boards: $(help-board-dirs)
1145
1146boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1147
1148$(help-board-dirs): help-%:
1149 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1150 @$(if $(boards-per-dir), \
1151 $(foreach b, $(boards-per-dir), \
1152 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1153 echo '')
1154
1155
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156# Documentation targets
1157# ---------------------------------------------------------------------------
1158%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001159 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1161
1162else # KBUILD_EXTMOD
1163
1164###
1165# External module support.
1166# When building external modules the kernel used as basis is considered
1167# read-only, and no consistency checks are made and the make
1168# system is not used on the basis kernel. If updates are required
1169# in the basis kernel ordinary make commands (without M=...) must
1170# be used.
1171#
1172# The following are the only valid targets when building external
1173# modules.
1174# make M=dir clean Delete all automatically generated files
1175# make M=dir modules Make all modules in specified dir
1176# make M=dir Same as 'make M=dir modules'
1177# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001178# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179# Assumes install directory is already created
1180
1181# We are always building modules
1182KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001183PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001185 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
Paul Smith4f193362006-03-05 17:14:10 -05001187PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188$(objtree)/Module.symvers:
1189 @test -e $(objtree)/Module.symvers || ( \
1190 echo; \
1191 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1192 echo " is missing; modules will have no dependencies and modversions."; \
1193 echo )
1194
1195module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001196PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197$(module-dirs): crmodverdir $(objtree)/Module.symvers
1198 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1199
1200modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001201 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001202 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203
Paul Smith4f193362006-03-05 17:14:10 -05001204PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001205modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001206
Paul Smith4f193362006-03-05 17:14:10 -05001207install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1208PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001209_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001210 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001211 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212
Paul Smith4f193362006-03-05 17:14:10 -05001213PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001214_emodinst_post: _emodinst_
1215 $(call cmd,depmod)
1216
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1218
Paul Smith4f193362006-03-05 17:14:10 -05001219PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220$(clean-dirs):
1221 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1222
1223clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001224clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
1226help:
1227 @echo ' Building external modules.'
1228 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1229 @echo ''
1230 @echo ' modules - default target, build the module(s)'
1231 @echo ' modules_install - install the module'
1232 @echo ' clean - remove generated files in module directory only'
1233 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001234
1235# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001236PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001237prepare: ;
1238scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239endif # KBUILD_EXTMOD
1240
Michal Marek88d7be02010-09-06 12:00:08 +02001241clean: $(clean-dirs)
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +02001242 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
Michal Marek88d7be02010-09-06 12:00:08 +02001243 $(call cmd,rmdirs)
1244 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001245 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001246 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
David Howellsaddbcdb2012-09-26 10:09:50 +01001247 -o -name '*.ko.*' \
Michal Marek88d7be02010-09-06 12:00:08 +02001248 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1249 -o -name '*.symtypes' -o -name 'modules.order' \
1250 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1251 -o -name '*.gcno' \) -type f -print | xargs rm -f
1252
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253# Generate tags for editors
1254# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001255quiet_cmd_tags = GEN $@
1256 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001258tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 $(call cmd,tags)
1260
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261# Scripts to check various things for consistency
1262# ---------------------------------------------------------------------------
1263
Peter Foley279f3dd2011-04-26 17:15:01 -04001264PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1265
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001267 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001269 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270
1271versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001272 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001274 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275
Nicolas Palix74425ee2010-06-06 17:15:01 +02001276coccicheck:
1277 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1278
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279namespacecheck:
1280 $(PERL) $(srctree)/scripts/namespace.pl
1281
Adrian Bunk295ac052007-08-24 23:04:56 +02001282export_report:
1283 $(PERL) $(srctree)/scripts/export_report.pl
1284
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285endif #ifeq ($(config-targets),1)
1286endif #ifeq ($(mixed-targets),1)
1287
Roman Zippelc30a02e2006-06-08 22:12:50 -07001288PHONY += checkstack kernelrelease kernelversion
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001289
Jeff Dike011e3a92006-12-13 00:34:12 -08001290# UML needs a little special treatment here. It wants to use the host
1291# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1292# else wants $(ARCH), including people doing cross-builds, which means
1293# that $(SUBARCH) doesn't work here.
1294ifeq ($(ARCH), um)
1295CHECKSTACK_ARCH := $(SUBARCH)
1296else
1297CHECKSTACK_ARCH := $(ARCH)
1298endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299checkstack:
1300 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001301 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001303kernelrelease:
1304 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001305
Sam Ravnborgcb584552006-01-09 21:20:34 +01001306kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001307 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308
Borislav Petkovea01fa92012-04-11 18:36:18 +02001309# Clear a bunch of variables before executing the submake
1310tools/: FORCE
1311 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/
1312
1313tools/%: FORCE
1314 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/ $*
1315
Sam Ravnborg06300b22006-01-25 07:13:18 +01001316# Single targets
1317# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001318# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001319# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001320# - build with separate output dir 'make O=...'
1321# - external modules
1322#
1323# target-dir => where to store outputfile
1324# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001325
Sam Ravnborg06300b22006-01-25 07:13:18 +01001326ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001327 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001328 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001329else
1330 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001331 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1332 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001333endif
1334
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001335%.s: %.c prepare scripts FORCE
1336 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1337%.i: %.c prepare scripts FORCE
1338 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1339%.o: %.c prepare scripts FORCE
1340 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1341%.lst: %.c prepare scripts FORCE
1342 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1343%.s: %.S prepare scripts FORCE
1344 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1345%.o: %.S prepare scripts FORCE
1346 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001347%.symtypes: %.c prepare scripts FORCE
1348 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001349
1350# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001351/: prepare scripts FORCE
1352 $(cmd_crmodverdir)
1353 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1354 $(build)=$(build-dir)
1355%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001356 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001357 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001358 $(build)=$(build-dir)
1359%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001360 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001361 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001362 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001363 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001364
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365# FIXME Should go into a make.lib or something
1366# ===========================================================================
1367
1368quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1369 cmd_rmdirs = rm -rf $(rm-dirs)
1370
1371quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1372 cmd_rmfiles = rm -f $(rm-files)
1373
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001374# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001375quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001376 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1377 $(KERNELRELEASE)
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001378
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001379# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001380# clean it up only when building all modules
1381cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1382 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384# read all saved command lines
1385
1386targets := $(wildcard $(sort $(targets)))
1387cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1388
1389ifneq ($(cmd_files),)
1390 $(cmd_files): ; # Do not try to update included dependency files
1391 include $(cmd_files)
1392endif
1393
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1395# Usage:
1396# $(Q)$(MAKE) $(clean)=dir
1397clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1398
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399endif # skip-makefile
1400
Paul Smith4f193362006-03-05 17:14:10 -05001401PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001403
Paul Smith4f193362006-03-05 17:14:10 -05001404# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001405# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001406.PHONY: $(PHONY)