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Linus Torvalds55922c92011-05-29 17:43:36 -07001VERSION = 3
Linus Torvaldsc9eaa442014-04-13 14:18:35 -07002PATCHLEVEL = 15
Linus Torvalds55922c92011-05-29 17:43:36 -07003SUBLEVEL = 0
Linus Torvaldsc9eaa442014-04-13 14:18:35 -07004EXTRAVERSION = -rc1
Linus Torvalds38dbfb52014-02-02 16:42:13 -08005NAME = Shuffling Zombie Juror
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
Borislav Petkovab7474e2013-11-11 15:27:43 +010025# Avoid interference with shell env settings
26unexport GREP_OPTIONS
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028# We are using a recursive build, so we need to do a little thinking
29# to get the ordering right.
30#
31# Most importantly: sub-Makefiles should only ever modify files in
32# their own directory. If in some directory we have a dependency on
33# a file in another dir (which doesn't happen often, but it's often
34# unavoidable when linking the built-in.o targets which finally
35# turn into vmlinux), we will call a sub make in that other dir, and
36# after that we are sure that everything which is in that other dir
37# is now up to date.
38#
39# The only cases where we need to modify files which have global
40# effects are thus separated out and done before the recursive
41# descending is started. They are now explicitly listed as the
42# prepare rule.
43
44# To put more focus on warnings, be less verbose as default
45# Use 'make V=1' to see the full commands
46
Cheng Renquanb8b06182009-05-26 16:03:07 +080047ifeq ("$(origin V)", "command line")
48 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070049endif
50ifndef KBUILD_VERBOSE
51 KBUILD_VERBOSE = 0
52endif
53
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040054# Call a source code checker (by default, "sparse") as part of the
55# C compilation.
56#
57# Use 'make C=1' to enable checking of only re-compiled files.
58# Use 'make C=2' to enable checking of *all* source files, regardless
59# of whether they are re-compiled or not.
60#
61# See the file "Documentation/sparse.txt" for more details, including
62# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Cheng Renquanb8b06182009-05-26 16:03:07 +080064ifeq ("$(origin C)", "command line")
65 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066endif
67ifndef KBUILD_CHECKSRC
68 KBUILD_CHECKSRC = 0
69endif
70
71# Use make M=dir to specify directory of external module to build
72# Old syntax make ... SUBDIRS=$PWD is still supported
73# Setting the environment variable KBUILD_EXTMOD take precedence
74ifdef SUBDIRS
75 KBUILD_EXTMOD ?= $(SUBDIRS)
76endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Cheng Renquanb8b06182009-05-26 16:03:07 +080078ifeq ("$(origin M)", "command line")
79 KBUILD_EXTMOD := $(M)
80endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82# kbuild supports saving output files in a separate directory.
83# To locate output files in a separate directory two syntaxes are supported.
84# In both cases the working directory must be the root of the kernel src.
85# 1) O=
86# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020087#
Linus Torvalds1da177e2005-04-16 15:20:36 -070088# 2) Set KBUILD_OUTPUT
89# Set the environment variable KBUILD_OUTPUT to point to the directory
90# where the output files shall be placed.
91# export KBUILD_OUTPUT=dir/to/store/output/files/
92# make
93#
94# The O= assignment takes precedence over the KBUILD_OUTPUT environment
95# variable.
96
97
98# KBUILD_SRC is set on invocation of make in OBJ directory
99# KBUILD_SRC is not intended to be used by the regular user (for now)
100ifeq ($(KBUILD_SRC),)
101
102# OK, Make called in directory where kernel src resides
103# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800104ifeq ("$(origin O)", "command line")
105 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106endif
107
108# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500109PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110_all:
111
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100112# Cancel implicit rules on top Makefile
113$(CURDIR)/Makefile Makefile: ;
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115ifneq ($(KBUILD_OUTPUT),)
116# Invoke a second make in the output directory, passing relevant variables
117# check that the output directory actually exists
118saved-output := $(KBUILD_OUTPUT)
Masahiro Yamada1c9e70a2014-03-31 16:41:36 +0900119KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
120 && /bin/pwd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121$(if $(KBUILD_OUTPUT),, \
Masahiro Yamada1c9e70a2014-03-31 16:41:36 +0900122 $(error failed to create output directory "$(saved-output)"))
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
Charles Keepax16f89092012-10-15 13:49:12 +0100127 @:
Milton Miller0b357862007-09-21 18:09:02 -0500128
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,
Masahiro Yamada38385f82014-04-28 16:26:18 +0900165# then ARCH is assigned, getting whatever value it gets normally, and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166# SUBARCH is subsequently ignored.
167
David Woodhouseffee0de2012-12-20 21:51:55 +0000168SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
169 -e s/sun4u/sparc64/ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800171 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900172 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Will Deaconf1b99392013-01-18 19:00:47 +0000173 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175# Cross compiling and selecting different set of gcc/bin-utils
176# ---------------------------------------------------------------------------
177#
178# When performing cross compilation for other architectures ARCH shall be set
179# to the target architecture. (See arch/* for the possibilities).
180# ARCH can be set during invocation of make:
181# make ARCH=ia64
182# Another way is to have ARCH set in the environment.
183# The default ARCH is the host where make is executed.
184
185# CROSS_COMPILE specify the prefix used for all executables used
186# during compilation. Only gcc and related bin-utils executables
187# are prefixed with $(CROSS_COMPILE).
188# CROSS_COMPILE can be set on the command line
189# make CROSS_COMPILE=ia64-linux-
190# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800191# A third alternative is to store a setting in .config so that plain
192# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193# Default value for CROSS_COMPILE is not to prefix executables
194# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
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
Behan Webster61163ef2013-09-03 22:27:23 -0400247ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
248HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
249 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
250endif
251
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200252# Decide whether to build built-in, modular, or both.
253# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
255KBUILD_MODULES :=
256KBUILD_BUILTIN := 1
257
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900258# If we have only "make modules", don't compile built-in objects.
259# When we're building modules with modversions, we need to consider
260# the built-in objects during the descend as well, in order to
261# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
263ifeq ($(MAKECMDGOALS),modules)
264 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
265endif
266
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900267# If we have "make <whatever> modules", compile modules
268# in addition to whatever we do anyway.
269# Just "make" or "make all" shall build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
271ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
272 KBUILD_MODULES := 1
273endif
274
275ifeq ($(MAKECMDGOALS),)
276 KBUILD_MODULES := 1
277endif
278
Sam Ravnborge579d352005-07-27 08:10:10 +0200279export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
281
282# Beautify output
283# ---------------------------------------------------------------------------
284#
285# Normally, we echo the whole command before executing it. By making
286# that echo $($(quiet)$(cmd)), we now have the possibility to set
287# $(quiet) to choose other forms of output instead, e.g.
288#
289# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
290# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
291#
292# If $(quiet) is empty, the whole command will be printed.
Masahiro Yamada38385f82014-04-28 16:26:18 +0900293# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200294# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295# the variable $(silent_cmd_cc_o_c) doesn't exist.
296#
Adrian Bunka58a4142006-01-10 00:08:17 +0100297# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298# for commands that shall be hidden in non-verbose mode.
299#
300# $(Q)ln $@ :<
301#
302# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
303# If KBUILD_VERBOSE equals 1 then the above command is displayed.
304
305ifeq ($(KBUILD_VERBOSE),1)
306 quiet =
307 Q =
308else
309 quiet=quiet_
310 Q = @
311endif
312
313# If the user is running make -s (silent mode), suppress echoing of
314# commands
315
Emil Medvee36aaea2014-01-06 02:58:40 -0600316ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
317ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
318 quiet=silent_
319endif
320else # make-3.8x
Jason Wessele6ac89f2012-01-05 16:46:30 -0600321ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 quiet=silent_
323endif
Emil Medvee36aaea2014-01-06 02:58:40 -0600324endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
326export quiet Q KBUILD_VERBOSE
327
Behan Webster61163ef2013-09-03 22:27:23 -0400328ifneq ($(CC),)
329ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
330COMPILER := clang
331else
332COMPILER := gcc
333endif
334export COMPILER
335endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337# Look for make include files relative to root of kernel src
338MAKEFLAGS += --include-dir=$(srctree)
339
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100340# We need some generic definitions (do not try to remake the file).
341$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800342include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344# Make variables (CC, etc...)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345AS = $(CROSS_COMPILE)as
346LD = $(CROSS_COMPILE)ld
347CC = $(CROSS_COMPILE)gcc
348CPP = $(CC) -E
349AR = $(CROSS_COMPILE)ar
350NM = $(CROSS_COMPILE)nm
351STRIP = $(CROSS_COMPILE)strip
352OBJCOPY = $(CROSS_COMPILE)objcopy
353OBJDUMP = $(CROSS_COMPILE)objdump
354AWK = awk
355GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200356INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357DEPMOD = /sbin/depmod
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358PERL = perl
359CHECK = sparse
360
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100361CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
362 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200363CFLAGS_MODULE =
364AFLAGS_MODULE =
365LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366CFLAGS_KERNEL =
367AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700368CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370
David Howellsabbf1592012-10-02 18:01:26 +0100371# Use USERINCLUDE when you must reference the UAPI directories only.
372USERINCLUDE := \
373 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
374 -Iarch/$(hdr-arch)/include/generated/uapi \
375 -I$(srctree)/include/uapi \
376 -Iinclude/generated/uapi \
377 -include $(srctree)/include/linux/kconfig.h
378
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379# Use LINUXINCLUDE when you must reference the include/ directory.
380# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100381LINUXINCLUDE := \
382 -I$(srctree)/arch/$(hdr-arch)/include \
383 -Iarch/$(hdr-arch)/include/generated \
384 $(if $(KBUILD_SRC), -I$(srctree)/include) \
385 -Iinclude \
386 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100388KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200390KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700391 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300392 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800393 -Wno-format-security \
Behan Webster61163ef2013-09-03 22:27:23 -0400394 $(call cc-option,-fno-delete-null-pointer-checks,)
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200395KBUILD_AFLAGS_KERNEL :=
396KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200397KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200398KBUILD_AFLAGS_MODULE := -DMODULE
399KBUILD_CFLAGS_MODULE := -DMODULE
400KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700402# Read KERNELRELEASE from include/config/kernel.release (if it exists)
403KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Michal Marekcacd54e2011-05-30 13:36:07 +0200404KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100405
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200406export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100407export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200408export CPP AR NM STRIP OBJCOPY OBJDUMP
409export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200410export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411
Sam Ravnborg06c50402007-10-15 22:17:25 +0200412export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700413export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200414export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200415export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200416export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200417export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
419# When compiling out-of-tree modules, put MODVERDIR in the module
420# tree rather than in the kernel tree. The kernel tree might
421# even be read-only.
422export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424# Files to ignore in find ... statements
425
Prarit Bhargavaae63b2d2014-02-06 07:51:42 -0500426export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
427 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
428 -prune -o
Jesper Juhl450c6072012-02-16 22:49:15 +0100429export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
430 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432# ===========================================================================
433# Rules shared between *config targets and build targets
434
435# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500436PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437scripts_basic:
438 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500439 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200441# To avoid any implicit rule to kick in, define an empty command.
442scripts/basic/%: scripts_basic ;
443
Paul Smith4f193362006-03-05 17:14:10 -0500444PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200445# outputmakefile generates a Makefile in the output directory, if using a
446# separate output directory. This allows convenient use of make in the
447# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200449ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100450 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200451 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
452 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
453endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200455# Support for using generic headers in asm-generic
456PHONY += asm-generic
457asm-generic:
458 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
Catalin Marinas3c5994c2012-10-17 12:25:44 +0100459 src=asm obj=arch/$(SRCARCH)/include/generated/asm
460 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
461 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200462
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463# To make sure we do not include .config for any of the *config targets
464# catch them early, and hand them over to scripts/kconfig/Makefile
465# It is allowed to specify more targets when calling make, including
466# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200467# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468# Detect when mixed targets is specified, and make a second invocation
469# of make so .config is not included in this case either (for *config).
470
David Howells10b63952012-10-02 18:01:57 +0100471version_h := include/generated/uapi/linux/version.h
David Howellsd183e6f2012-10-02 18:01:56 +0100472
Roman Zippel3eb3c742007-01-10 14:45:28 +0100473no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800474 cscope gtags TAGS tags help %docs check% coccicheck \
David Howellsd183e6f2012-10-02 18:01:56 +0100475 $(version_h) headers_% archheaders archscripts \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700476 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
478config-targets := 0
479mixed-targets := 0
480dot-config := 1
481
482ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
483 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
484 dot-config := 0
485 endif
486endif
487
488ifeq ($(KBUILD_EXTMOD),)
489 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
490 config-targets := 1
491 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
492 mixed-targets := 1
493 endif
494 endif
495endif
496
497ifeq ($(mixed-targets),1)
498# ===========================================================================
499# We're called with mixed targets (*config and build targets).
500# Handle them one by one.
501
Masahiro Yamada9319f452014-04-09 15:51:35 +0900502PHONY += $(MAKECMDGOALS) __build_one_by_one
503
504$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
505 @:
506
507__build_one_by_one:
508 $(Q)set -e; \
509 for i in $(MAKECMDGOALS); do \
510 $(MAKE) -f $(srctree)/Makefile $$i; \
511 done
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
513else
514ifeq ($(config-targets),1)
515# ===========================================================================
516# *config targets only - make sure prerequisites are updated, and descend
517# in scripts/kconfig to make the *config target
518
519# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
520# KBUILD_DEFCONFIG may point out an alternative default configuration
521# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200522include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400523export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100525config: scripts_basic outputmakefile FORCE
526 $(Q)mkdir -p include/linux include/config
527 $(Q)$(MAKE) $(build)=scripts/kconfig $@
528
529%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700530 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 $(Q)$(MAKE) $(build)=scripts/kconfig $@
532
533else
534# ===========================================================================
535# Build targets only - this includes vmlinux, arch specific targets, clean
536# targets and others. In general all targets except *config targets.
537
538ifeq ($(KBUILD_EXTMOD),)
539# Additional helpers built in scripts/
540# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200541# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500542PHONY += scripts
Andreas Schwaba54292f2013-04-09 19:57:00 +0200543scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
544 asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 $(Q)$(MAKE) $(build)=$(@)
546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547# Objects we will link into vmlinux / subdirs we need to visit
548init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100549drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550net-y := net/
551libs-y := lib/
552core-y := usr/
553endif # KBUILD_EXTMOD
554
555ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200556# Read in config
557-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200559ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560# Read in dependencies to all Kconfig* files, make sure to run
561# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700562-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700565$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
Roman Zippelc955cca2006-06-08 22:12:39 -0700567# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100568# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200569# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100570# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100571include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
573else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200574# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200575# but do not care if they are up-to-date. Use auto.conf to trigger the test
576PHONY += include/config/auto.conf
577
578include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200579 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200580 echo >&2; \
581 echo >&2 " ERROR: Kernel configuration is invalid."; \
582 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
583 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
584 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200585 /bin/false)
586
587endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700588
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589else
590# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700591include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200592endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
594# The all: target is the default when no target is given on the
595# command line.
596# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200597# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598all: vmlinux
599
600ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Arnd Bergmanne74fc972013-02-15 21:23:58 +0100601KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200603KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604endif
605
Paul Mundta1f42be2012-06-18 13:48:08 +0900606include $(srctree)/arch/$(SRCARCH)/Makefile
607
Andi Kleen1873e872012-03-28 11:51:18 -0700608ifdef CONFIG_READABLE_ASM
609# Disable optimizations that make assembler listings hard to read.
610# reorder blocks reorders the control in the function
611# ipa clone creates specialized cloned functions
612# partial inlining inlines only parts of functions
613KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
614 $(call cc-option,-fno-ipa-cp-clone,) \
615 $(call cc-option,-fno-partial-inlining)
616endif
617
Mike Frysinger08f67462009-06-04 16:29:08 -0700618ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100619KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
620endif
621
Kees Cook19952a92013-12-19 11:35:58 -0800622# Handle stack protector mode.
Kees Cook87796572013-12-19 11:35:59 -0800623ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
Kees Cook19952a92013-12-19 11:35:58 -0800624 stackp-flag := -fstack-protector
625 ifeq ($(call cc-option, $(stackp-flag)),)
Jan Beulich6c15b322014-02-25 15:01:48 -0800626 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
Fathi Boudra27b2a492014-02-25 15:01:46 -0800627 -fstack-protector not supported by compiler)
Kees Cook19952a92013-12-19 11:35:58 -0800628 endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800629else
630ifdef CONFIG_CC_STACKPROTECTOR_STRONG
Kees Cook87796572013-12-19 11:35:59 -0800631 stackp-flag := -fstack-protector-strong
632 ifeq ($(call cc-option, $(stackp-flag)),)
633 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
634 -fstack-protector-strong not supported by compiler)
635 endif
Kees Cook19952a92013-12-19 11:35:58 -0800636else
637 # Force off for distro compilers that enable stack protector by default.
638 stackp-flag := $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900639endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800640endif
Kees Cook19952a92013-12-19 11:35:58 -0800641KBUILD_CFLAGS += $(stackp-flag)
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100642
Behan Webster61163ef2013-09-03 22:27:23 -0400643ifeq ($(COMPILER),clang)
644KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
645KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
646KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
647KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
648KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
649# Quiet clang warning: comparison of unsigned expression < 0 is always false
650KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
651# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
652# source of a reference will be _MergedGlobals and not on of the whitelisted names.
653# See modpost pattern 2
654KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
655else
656
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400657# This warning generated too much noise in a regular build.
658# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200659KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Behan Webster61163ef2013-09-03 22:27:23 -0400660endif
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400661
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200663KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100665# Some targets (ARM with Thumb2, for example), can't be built with frame
666# pointers. For those, we don't have FUNCTION_TRACER automatically
667# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
668# incompatible with -fomit-frame-pointer with current GCC, so we don't use
669# -fomit-frame-pointer with FUNCTION_TRACER.
670ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200671KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100673endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674
675ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200676KBUILD_CFLAGS += -g
Geoff Levand7db43632013-12-11 23:34:40 +0000677KBUILD_AFLAGS += -Wa,--gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678endif
679
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200680ifdef CONFIG_DEBUG_INFO_REDUCED
Andi Kleene82c4bb2013-02-07 13:58:40 -0800681KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
682 $(call cc-option,-fno-var-tracking)
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200683endif
684
Steven Rostedt606576c2008-10-06 19:06:12 -0400685ifdef CONFIG_FUNCTION_TRACER
Steven Rostedta2546fa2011-02-09 13:15:59 -0500686ifdef CONFIG_HAVE_FENTRY
687CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
688endif
689KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
690KBUILD_AFLAGS += $(CC_USING_FENTRY)
Steven Rostedt72441cb2010-10-13 17:12:30 -0400691ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400692 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400693 BUILD_C_RECORDMCOUNT := y
694 export BUILD_C_RECORDMCOUNT
695 endif
696endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200697endif
698
Sam Ravnborg91341d42008-01-21 21:31:44 +0100699# We trigger additional mismatches with less inlining
700ifdef CONFIG_DEBUG_SECTION_MISMATCH
701KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
702endif
703
Sam Ravnborge8e69932005-04-30 16:51:42 -0700704# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700705NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700706CHECKFLAGS += $(NOSTDINC_FLAGS)
707
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200709KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200711# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200712KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400714# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700715KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700716
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700717# conserve stack if available
718KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
719
Sergei Trofimovich80970472013-09-13 14:51:40 -0700720# disallow errors like 'EXPORT_GPL(foo);' with missing header
721KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
722
723# require functions to have arguments in prototypes, not empty 'int foo()'
724KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
725
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800726# Prohibit date/time macros, which would make the build non-deterministic
727KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
728
Michal Marek40df7592011-04-20 13:45:30 +0200729# use the deterministic mode of AR if available
730KBUILD_ARFLAGS := $(call ar-option,D)
731
Jason Baronbf5438fc2010-09-17 11:09:00 -0400732# check for 'asm goto'
733ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
734 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
735endif
736
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900737include $(srctree)/scripts/Makefile.extrawarn
738
Sam Ravnborg06c50402007-10-15 22:17:25 +0200739# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Ozan Çağlayan70cfe022012-08-14 19:00:54 +0300740KBUILD_CPPFLAGS += $(KCPPFLAGS)
741KBUILD_AFLAGS += $(KAFLAGS)
742KBUILD_CFLAGS += $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200743
Roland McGrath18991192007-07-19 01:48:40 -0700744# Use --build-id when available.
745LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200746 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200747KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700748LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
749
David Howells5d7d18f2009-03-04 11:59:07 -0800750ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200751LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800752endif
753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200755# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756# set in the environment
757# Also any assignments in arch/$(ARCH)/Makefile take precedence over
758# this default value
759export KBUILD_IMAGE ?= vmlinux
760
761#
762# INSTALL_PATH specifies where to place the updated kernel and system map
763# images. Default is /boot, but you can set it to other values
764export INSTALL_PATH ?= /boot
765
766#
Jason Cooperf4d4ffc2013-12-01 23:56:28 +0000767# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
768# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
769# an argument if needed. Otherwise it defaults to the kernel install path
770#
771export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
772
773#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
775# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200776# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777#
778
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100779MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780export MODLIB
781
Theodore Ts'oac031f22006-06-21 20:53:09 -0400782#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900783# INSTALL_MOD_STRIP, if defined, will cause modules to be
784# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
785# the default option --strip-debug will be used. Otherwise,
786# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100787
Theodore Ts'oac031f22006-06-21 20:53:09 -0400788ifdef INSTALL_MOD_STRIP
789ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100790mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400791else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100792mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400793endif # INSTALL_MOD_STRIP=1
794else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100795mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400796endif # INSTALL_MOD_STRIP
797export mod_strip_cmd
798
P J P1bf49dd2013-11-12 15:11:44 -0800799# Select initial ramdisk compression format, default is gzip(1).
800# This shall be used by the dracut(8) tool while creating an initramfs image.
801#
Jan Beulich7ac18152013-12-18 17:08:57 -0800802INITRD_COMPRESS-y := gzip
803INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
804INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
805INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
806INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
807INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
Linus Torvaldsb7000ad2013-12-20 16:52:45 -0800808# do not export INITRD_COMPRESS, since we didn't actually
809# choose a sane default compression above.
810# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811
Michal Marekd9d8d7e2013-01-25 13:41:31 +1030812ifdef CONFIG_MODULE_SIG_ALL
Rusty Russelle2a666d2012-10-19 11:53:15 +1030813MODSECKEY = ./signing_key.priv
814MODPUBKEY = ./signing_key.x509
815export MODPUBKEY
Michal Marek4bc94102013-01-25 13:41:12 +1030816mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
Rusty Russelle2a666d2012-10-19 11:53:15 +1030817else
818mod_sign_cmd = true
819endif
820export mod_sign_cmd
821
822
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100824core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
826vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
827 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
828 $(net-y) $(net-m) $(libs-y) $(libs-m)))
829
830vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
831 $(init-n) $(init-) \
832 $(core-n) $(core-) $(drivers-n) $(drivers-) \
833 $(net-n) $(net-) $(libs-n) $(libs-))))
834
835init-y := $(patsubst %/, %/built-in.o, $(init-y))
836core-y := $(patsubst %/, %/built-in.o, $(core-y))
837drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
838net-y := $(patsubst %/, %/built-in.o, $(net-y))
839libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
840libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
841libs-y := $(libs-y1) $(libs-y2)
842
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200843# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200844export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
845export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
846export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200847export LDFLAGS_vmlinux
Michal Marek6615d6c2013-04-12 14:12:50 +0200848# used by scripts/pacmage/Makefile
849export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200851vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200853# Final link of vmlinux
854 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
855quiet_cmd_link-vmlinux = LINK $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200857# Include targets which we want to
858# execute if the rest of the kernel build went well.
859vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700860ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100861 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700862endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700863ifdef CONFIG_SAMPLES
864 $(Q)$(MAKE) $(build)=samples
865endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700866ifdef CONFIG_BUILD_DOCSRC
867 $(Q)$(MAKE) $(build)=Documentation
868endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200869 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200870
Masahiro Yamada38385f82014-04-28 16:26:18 +0900871# The actual objects are generated when descending,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200873$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
875# Handle descending into subdirectories listed in $(vmlinux-dirs)
876# Preset locale variables to speed up the build process. Limit locale
877# tweaks to this spot to avoid wrong language settings when running
878# make menuconfig etc.
879# Error messages still appears in the original language
880
Paul Smith4f193362006-03-05 17:14:10 -0500881PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200882$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 $(Q)$(MAKE) $(build)=$@
884
Michal Marek0d0e7712013-07-11 15:34:51 +0200885define filechk_kernel.release
886 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
887endef
888
Geert Uytterhoeven83a35e32013-06-28 11:27:31 +0200889# Store (new) KERNELRELEASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700890include/config/kernel.release: include/config/auto.conf FORCE
Michal Marek0d0e7712013-07-11 15:34:51 +0200891 $(call filechk,kernel.release)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100892
893
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200895# or the modules are listed in "prepare".
896# A multi level approach is used. prepareN is processed before prepareN-1.
897# archprepare is used in arch Makefiles and when processed asm symlink,
898# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200900# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500901PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200902
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200903# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904# and if so do:
905# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700906prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500908 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700909 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +0200910 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
911 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 /bin/false; \
913 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914endif
915
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200916# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200917prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
David Howellsd183e6f2012-10-02 18:01:56 +0100919prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200920 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200921 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300923archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200924
925prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200926 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200927
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800929prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931# Generate some files
932# ---------------------------------------------------------------------------
933
934# KERNELRELEASE can change from a few different places, meaning version.h
935# needs to be updated, so this check is forced on all builds
936
937uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200938define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200940 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
941 exit 1; \
942 fi; \
943 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944endef
945
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200946define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +0100947 (echo \#define LINUX_VERSION_CODE $(shell \
948 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200949 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
950endef
951
David Howellsd183e6f2012-10-02 18:01:56 +0100952$(version_h): $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 $(call filechk,version.h)
954
Sam Ravnborg273b2812009-10-18 00:52:28 +0200955include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200956 $(call filechk,utsrelease.h)
957
Vegard Nossum179efcb2008-12-16 12:33:43 +0100958PHONY += headerdep
959headerdep:
Peter Foley9663d982011-04-26 17:17:11 -0400960 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
961 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +0100962
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963# ---------------------------------------------------------------------------
964
Paul Smith4f193362006-03-05 17:14:10 -0500965PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966depend dep:
967 @echo '*** Warning: make $@ is unnecessary now.'
968
969# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +0300970# Firmware install
971INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
972export INSTALL_FW_PATH
973
974PHONY += firmware_install
975firmware_install: FORCE
976 @mkdir -p $(objtree)/firmware
977 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
978
979# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100980# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +0100981
Sam Ravnborge6883b12008-06-05 16:43:46 +0200982#Default location for installed headers
983export INSTALL_HDR_PATH = $(objtree)/usr
984
Sam Ravnborge6883b12008-06-05 16:43:46 +0200985hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200986
987# If we do an all arch process set dst to asm-$(hdr-arch)
988hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +0200989
H. Peter Anvin052ad272011-11-17 13:17:35 -0800990PHONY += archheaders
991archheaders:
992
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300993PHONY += archscripts
994archscripts:
995
Sam Ravnborge6883b12008-06-05 16:43:46 +0200996PHONY += __headers
David Howellsd183e6f2012-10-02 18:01:56 +0100997__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -0700998 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100999
1000PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001001headers_install_all:
1002 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001003
David Woodhouse8d730cf2006-06-18 11:58:39 +01001004PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001005headers_install: __headers
David Howells10b63952012-10-02 18:01:57 +01001006 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1007 $(error Headers not exportable for the $(SRCARCH) architecture))
1008 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1009 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001010
Mike Frysinger1f857122007-02-14 00:33:02 -08001011PHONY += headers_check_all
1012headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001013 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001014
David Woodhouse68475352006-06-18 12:02:10 +01001015PHONY += headers_check
1016headers_check: headers_install
David Howells10b63952012-10-02 18:01:57 +01001017 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1018 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001019
David Woodhouse8d730cf2006-06-18 11:58:39 +01001020# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021# Modules
1022
1023ifdef CONFIG_MODULES
1024
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001025# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026
Michal Marek73d13932010-03-10 12:28:58 +01001027all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001029# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001030#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001031# A module can be listed more than once in obj-m resulting in
1032# duplicate lines in modules.order files. Those are removed
1033# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034
Paul Smith4f193362006-03-05 17:14:10 -05001035PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001036modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001037 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001038 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001039 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001040 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
Michal Mareka6c36632010-03-08 10:07:12 +01001042modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1043 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1044
Michal Marek73d13932010-03-10 12:28:58 +01001045%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001046 $(Q)$(MAKE) $(modbuiltin)=$*
1047
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048
1049# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001050PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001051modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052
1053# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001054PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055modules_install: _modinst_ _modinst_post
1056
Paul Smith4f193362006-03-05 17:14:10 -05001057PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001058_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 @rm -rf $(MODLIB)/kernel
1060 @rm -f $(MODLIB)/source
1061 @mkdir -p $(MODLIB)/kernel
1062 @ln -s $(srctree) $(MODLIB)/source
1063 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1064 rm -f $(MODLIB)/build ; \
1065 ln -s $(objtree) $(MODLIB)/build ; \
1066 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001067 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001068 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001069 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001071# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072# boot a modules.dep even before / is mounted read-write. However the
1073# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001074PHONY += _modinst_post
Linus Torvalds6d128e12013-07-10 19:02:51 -07001075_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001076 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001077 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078
Josh Boyerd890f512012-11-05 09:09:24 +10301079ifeq ($(CONFIG_MODULE_SIG), y)
1080PHONY += modules_sign
1081modules_sign:
1082 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1083endif
1084
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085else # CONFIG_MODULES
1086
1087# Modules not configured
1088# ---------------------------------------------------------------------------
1089
1090modules modules_install: FORCE
Michal Marek5369f552012-07-07 23:04:40 +02001091 @echo >&2
1092 @echo >&2 "The present kernel configuration has modules disabled."
1093 @echo >&2 "Type 'make config' and enable loadable module support."
1094 @echo >&2 "Then build a kernel with module support enabled."
1095 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 @exit 1
1097
1098endif # CONFIG_MODULES
1099
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100###
1101# Cleaning is done on three levels.
1102# make clean Delete most generated files
1103# Leave enough to build external modules
1104# make mrproper Delete the current configuration, and all generated files
1105# make distclean Remove editor backup files, patch leftover files and the like
1106
1107# Directories & files removed with 'make clean'
1108CLEAN_DIRS += $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109
1110# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001111MRPROPER_DIRS += include/config usr/include include/generated \
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001112 arch/*/include/generated .tmp_objdiff
David Howellsd183e6f2012-10-02 18:01:56 +01001113MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
Rusty Russelld5b71932012-10-02 14:35:24 +09301114 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1115 signing_key.priv signing_key.x509 x509.genkey \
1116 extra_certificates signing_key.x509.keyid \
Paul Gortmaker9c8cdb72014-02-13 16:28:58 -05001117 signing_key.x509.signer include/linux/version.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
1119# clean - Delete most, but leave enough to build external modules
1120#
1121clean: rm-dirs := $(CLEAN_DIRS)
1122clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -07001123clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124
Pawel Mollbd1ee802012-10-29 11:23:02 +00001125PHONY += $(clean-dirs) clean archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126$(clean-dirs):
1127 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1128
Pawel Mollbd1ee802012-10-29 11:23:02 +00001129vmlinuxclean:
1130 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1131
1132clean: archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
1134# mrproper - Delete all generated files, including .config
1135#
1136mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1137mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1138mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1139
Paul Smith4f193362006-03-05 17:14:10 -05001140PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141$(mrproper-dirs):
1142 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1143
1144mrproper: clean archmrproper $(mrproper-dirs)
1145 $(call cmd,rmdirs)
1146 $(call cmd,rmfiles)
1147
1148# distclean
1149#
Paul Smith4f193362006-03-05 17:14:10 -05001150PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
1152distclean: mrproper
1153 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001154 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Masahiro Yamadaa03fcb502014-03-28 16:36:12 +09001156 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157 -type f -print | xargs rm -f
1158
1159
1160# Packaging of the kernel to various formats
1161# ---------------------------------------------------------------------------
1162# rpm target kept for backward compatibility
1163package-dir := $(srctree)/scripts/package
1164
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001165%src-pkg: FORCE
1166 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001167%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001168 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001169rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001170 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
1172
1173# Brief documentation of the typical targets used
1174# ---------------------------------------------------------------------------
1175
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001176boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001178board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1179board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180
1181help:
1182 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001183 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001184 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001185 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001186 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 @echo ''
1188 @echo 'Configuration targets:'
1189 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1190 @echo ''
1191 @echo 'Other generic targets:'
1192 @echo ' all - Build all targets marked with [*]'
1193 @echo '* vmlinux - Build the bare kernel'
1194 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001195 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001196 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1197 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001199 @echo ' dir/file.[oisS] - Build specified target only'
1200 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1201 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001202 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001203 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 @echo ' tags/TAGS - Generate tags file for editors'
1205 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001206 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001207 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001208 @echo ' kernelversion - Output the version stored in Makefile'
Mike Marciniszync398ff02013-06-24 08:48:37 -04001209 @echo ' image_name - Output the image name'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001210 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001211 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001212 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 @echo ' checkstack - Generate a list of stack hogs'
1215 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001216 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001217 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001218 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001219 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001220 @echo ' headerdep - Detect inclusion cycles in headers'
1221 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1222 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001224 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 @echo ''
1226 @echo 'Documentation targets:'
1227 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1228 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001229 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001231 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 @echo ''
1233 @$(if $(boards), \
1234 $(foreach b, $(boards), \
1235 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1236 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001237 @$(if $(board-dirs), \
1238 $(foreach b, $(board-dirs), \
1239 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1240 printf " %-16s - Show all of the above\\n" help-boards; \
1241 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
1243 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001244 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001246 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1247 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001248 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001249 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1250 @echo ' 1: warnings which may be relevant and do not occur too often'
1251 @echo ' 2: warnings which occur quite often but may still be relevant'
1252 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001253 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 @echo ''
1255 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1256 @echo 'For further info see the ./README file'
1257
1258
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001259help-board-dirs := $(addprefix help-,$(board-dirs))
1260
1261help-boards: $(help-board-dirs)
1262
1263boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1264
1265$(help-board-dirs): help-%:
1266 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1267 @$(if $(boards-per-dir), \
1268 $(foreach b, $(boards-per-dir), \
1269 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1270 echo '')
1271
1272
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273# Documentation targets
1274# ---------------------------------------------------------------------------
1275%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001276 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1278
1279else # KBUILD_EXTMOD
1280
1281###
1282# External module support.
1283# When building external modules the kernel used as basis is considered
1284# read-only, and no consistency checks are made and the make
1285# system is not used on the basis kernel. If updates are required
1286# in the basis kernel ordinary make commands (without M=...) must
1287# be used.
1288#
1289# The following are the only valid targets when building external
1290# modules.
1291# make M=dir clean Delete all automatically generated files
1292# make M=dir modules Make all modules in specified dir
1293# make M=dir Same as 'make M=dir modules'
1294# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001295# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296# Assumes install directory is already created
1297
1298# We are always building modules
1299KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001300PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001302 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303
Paul Smith4f193362006-03-05 17:14:10 -05001304PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305$(objtree)/Module.symvers:
1306 @test -e $(objtree)/Module.symvers || ( \
1307 echo; \
1308 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1309 echo " is missing; modules will have no dependencies and modversions."; \
1310 echo )
1311
1312module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001313PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314$(module-dirs): crmodverdir $(objtree)/Module.symvers
1315 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1316
1317modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001318 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001319 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320
Paul Smith4f193362006-03-05 17:14:10 -05001321PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001322modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001323
Paul Smith4f193362006-03-05 17:14:10 -05001324install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1325PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001326_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001327 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001328 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329
Paul Smith4f193362006-03-05 17:14:10 -05001330PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001331_emodinst_post: _emodinst_
1332 $(call cmd,depmod)
1333
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1335
Paul Smith4f193362006-03-05 17:14:10 -05001336PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337$(clean-dirs):
1338 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1339
1340clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001341clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342
1343help:
1344 @echo ' Building external modules.'
1345 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1346 @echo ''
1347 @echo ' modules - default target, build the module(s)'
1348 @echo ' modules_install - install the module'
1349 @echo ' clean - remove generated files in module directory only'
1350 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001351
1352# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001353PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001354prepare: ;
1355scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356endif # KBUILD_EXTMOD
1357
Michal Marek88d7be02010-09-06 12:00:08 +02001358clean: $(clean-dirs)
1359 $(call cmd,rmdirs)
1360 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001361 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001362 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
David Howellsaddbcdb2012-09-26 10:09:50 +01001363 -o -name '*.ko.*' \
Michal Marek88d7be02010-09-06 12:00:08 +02001364 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1365 -o -name '*.symtypes' -o -name 'modules.order' \
1366 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1367 -o -name '*.gcno' \) -type f -print | xargs rm -f
1368
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369# Generate tags for editors
1370# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001371quiet_cmd_tags = GEN $@
1372 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001374tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375 $(call cmd,tags)
1376
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377# Scripts to check various things for consistency
1378# ---------------------------------------------------------------------------
1379
Peter Foley279f3dd2011-04-26 17:15:01 -04001380PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1381
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001383 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001385 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
1387versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001388 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001390 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391
Nicolas Palix74425ee2010-06-06 17:15:01 +02001392coccicheck:
1393 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1394
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395namespacecheck:
1396 $(PERL) $(srctree)/scripts/namespace.pl
1397
Adrian Bunk295ac052007-08-24 23:04:56 +02001398export_report:
1399 $(PERL) $(srctree)/scripts/export_report.pl
1400
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401endif #ifeq ($(config-targets),1)
1402endif #ifeq ($(mixed-targets),1)
1403
Mike Marciniszync398ff02013-06-24 08:48:37 -04001404PHONY += checkstack kernelrelease kernelversion image_name
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001405
Jeff Dike011e3a92006-12-13 00:34:12 -08001406# UML needs a little special treatment here. It wants to use the host
1407# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1408# else wants $(ARCH), including people doing cross-builds, which means
1409# that $(SUBARCH) doesn't work here.
1410ifeq ($(ARCH), um)
1411CHECKSTACK_ARCH := $(SUBARCH)
1412else
1413CHECKSTACK_ARCH := $(ARCH)
1414endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415checkstack:
1416 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001417 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001419kernelrelease:
1420 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001421
Sam Ravnborgcb584552006-01-09 21:20:34 +01001422kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001423 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
Mike Marciniszync398ff02013-06-24 08:48:37 -04001425image_name:
1426 @echo $(KBUILD_IMAGE)
1427
Borislav Petkovea01fa92012-04-11 18:36:18 +02001428# Clear a bunch of variables before executing the submake
1429tools/: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001430 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001431 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
Borislav Petkovea01fa92012-04-11 18:36:18 +02001432
1433tools/%: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001434 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001435 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
Borislav Petkovea01fa92012-04-11 18:36:18 +02001436
Sam Ravnborg06300b22006-01-25 07:13:18 +01001437# Single targets
1438# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001439# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001440# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001441# - build with separate output dir 'make O=...'
1442# - external modules
1443#
1444# target-dir => where to store outputfile
1445# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001446
Sam Ravnborg06300b22006-01-25 07:13:18 +01001447ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001448 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001449 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001450else
1451 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001452 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1453 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001454endif
1455
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001456%.s: %.c prepare scripts FORCE
1457 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1458%.i: %.c prepare scripts FORCE
1459 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1460%.o: %.c prepare scripts FORCE
1461 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1462%.lst: %.c prepare scripts FORCE
1463 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1464%.s: %.S prepare scripts FORCE
1465 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1466%.o: %.S prepare scripts FORCE
1467 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001468%.symtypes: %.c prepare scripts FORCE
1469 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001470
1471# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001472/: prepare scripts FORCE
1473 $(cmd_crmodverdir)
1474 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1475 $(build)=$(build-dir)
1476%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001477 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001478 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001479 $(build)=$(build-dir)
1480%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001481 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001482 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001483 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001484 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001485
Masahiro Yamada38385f82014-04-28 16:26:18 +09001486# FIXME Should go into a make.lib or something
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487# ===========================================================================
1488
1489quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1490 cmd_rmdirs = rm -rf $(rm-dirs)
1491
1492quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1493 cmd_rmfiles = rm -f $(rm-files)
1494
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001495# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001496quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001497 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
Rusty Russellb92021b2013-03-15 15:04:17 +10301498 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001499
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001500# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001501# clean it up only when building all modules
1502cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1503 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505# read all saved command lines
1506
1507targets := $(wildcard $(sort $(targets)))
1508cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1509
1510ifneq ($(cmd_files),)
1511 $(cmd_files): ; # Do not try to update included dependency files
1512 include $(cmd_files)
1513endif
1514
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1516# Usage:
1517# $(Q)$(MAKE) $(clean)=dir
1518clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1519
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520endif # skip-makefile
1521
Paul Smith4f193362006-03-05 17:14:10 -05001522PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001524
Paul Smith4f193362006-03-05 17:14:10 -05001525# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001526# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001527.PHONY: $(PHONY)