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Linus Torvalds55922c92011-05-29 17:43:36 -07001VERSION = 3
Linus Torvalds71715112014-06-15 17:45:28 -10002PATCHLEVEL = 16
Linus Torvalds55922c92011-05-29 17:43:36 -07003SUBLEVEL = 0
Linus Torvaldscd3de832014-07-06 12:37:51 -07004EXTRAVERSION = -rc4
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, $(MAKECMDGOALS)) _all: sub-make
Charles Keepax16f89092012-10-15 13:49:12 +0100127 @:
Milton Miller0b357862007-09-21 18:09:02 -0500128
Michal Marekc2e28dc2014-07-02 14:28:26 +0200129# Fake the "Entering directory" message once, so that IDEs/editors are
130# able to understand relative filenames.
Milton Miller0b357862007-09-21 18:09:02 -0500131sub-make: FORCE
Michal Marekc2e28dc2014-07-02 14:28:26 +0200132 @echo "make[1]: Entering directory \`$(KBUILD_OUTPUT)'"
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200133 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
134 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500135 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
136 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
138# Leave processing to above invocation of make
139skip-makefile := 1
140endif # ifneq ($(KBUILD_OUTPUT),)
141endif # ifeq ($(KBUILD_SRC),)
142
143# We process the rest of the Makefile if this is the final invocation of make
144ifeq ($(skip-makefile),)
145
146# If building an external module we do not care about the all: rule
147# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500148PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149ifeq ($(KBUILD_EXTMOD),)
150_all: all
151else
152_all: modules
153endif
154
Michal Marek9da07632014-04-25 23:25:18 +0200155ifeq ($(KBUILD_SRC),)
156 # building in the source tree
157 srctree := .
158else
159 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
160 # building in a subdirectory of the source tree
161 srctree := ..
162 else
163 srctree := $(KBUILD_SRC)
164 endif
165endif
Michal Marek7e1c0472014-04-25 17:29:45 +0200166objtree := .
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167src := $(srctree)
168obj := $(objtree)
169
Mattia Dongili0f558c32006-02-19 13:50:37 +0100170VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Amerigo Wang11294232009-06-19 03:40:26 -0400172export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175# SUBARCH tells the usermode build what the underlying arch is. That is set
176# first, and if a usermode build is happening, the "ARCH=um" on the command
177# line overrides the setting of ARCH below. If a native build is happening,
Masahiro Yamada38385f82014-04-28 16:26:18 +0900178# then ARCH is assigned, getting whatever value it gets normally, and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179# SUBARCH is subsequently ignored.
180
David Woodhouseffee0de2012-12-20 21:51:55 +0000181SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
182 -e s/sun4u/sparc64/ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800184 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900185 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Will Deaconf1b99392013-01-18 19:00:47 +0000186 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
188# Cross compiling and selecting different set of gcc/bin-utils
189# ---------------------------------------------------------------------------
190#
191# When performing cross compilation for other architectures ARCH shall be set
192# to the target architecture. (See arch/* for the possibilities).
193# ARCH can be set during invocation of make:
194# make ARCH=ia64
195# Another way is to have ARCH set in the environment.
196# The default ARCH is the host where make is executed.
197
198# CROSS_COMPILE specify the prefix used for all executables used
199# during compilation. Only gcc and related bin-utils executables
200# are prefixed with $(CROSS_COMPILE).
201# CROSS_COMPILE can be set on the command line
202# make CROSS_COMPILE=ia64-linux-
203# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800204# A third alternative is to store a setting in .config so that plain
205# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206# Default value for CROSS_COMPILE is not to prefix executables
207# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200208ARCH ?= $(SUBARCH)
Roland McGrath84336462009-12-21 16:24:06 -0800209CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200212UTS_MACHINE := $(ARCH)
213SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Sam Ravnborgd746d642007-11-12 20:14:19 +0100215# Additional ARCH settings for x86
216ifeq ($(ARCH),i386)
217 SRCARCH := x86
218endif
219ifeq ($(ARCH),x86_64)
220 SRCARCH := x86
221endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200222
Sam Ravnborg5e538792008-12-02 23:17:12 -0800223# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000224ifeq ($(ARCH),sparc32)
225 SRCARCH := sparc
226endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200227ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800228 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200229endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200230
Paul Mundt3cc000b2009-04-11 08:39:27 +0900231# Additional ARCH settings for sh
232ifeq ($(ARCH),sh64)
233 SRCARCH := sh
234endif
235
Chris Metcalf18aecc22011-05-04 14:38:26 -0400236# Additional ARCH settings for tile
Chris Metcalf6738d322011-05-25 15:24:00 -0400237ifeq ($(ARCH),tilepro)
238 SRCARCH := tile
239endif
Chris Metcalf18aecc22011-05-04 14:38:26 -0400240ifeq ($(ARCH),tilegx)
241 SRCARCH := tile
242endif
243
Sam Ravnborg5e538792008-12-02 23:17:12 -0800244# Where to locate arch specific headers
245hdr-arch := $(SRCARCH)
246
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700247KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500248export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700249
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250# SHELL used by kbuild
251CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
252 else if [ -x /bin/bash ]; then echo /bin/bash; \
253 else echo sh; fi ; fi)
254
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200255HOSTCC = gcc
256HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800257HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200258HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
Behan Webster61163ef2013-09-03 22:27:23 -0400260ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
261HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
262 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
263endif
264
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200265# Decide whether to build built-in, modular, or both.
266# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
268KBUILD_MODULES :=
269KBUILD_BUILTIN := 1
270
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900271# If we have only "make modules", don't compile built-in objects.
272# When we're building modules with modversions, we need to consider
273# the built-in objects during the descend as well, in order to
274# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
276ifeq ($(MAKECMDGOALS),modules)
277 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
278endif
279
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900280# If we have "make <whatever> modules", compile modules
281# in addition to whatever we do anyway.
282# Just "make" or "make all" shall build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283
284ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
285 KBUILD_MODULES := 1
286endif
287
288ifeq ($(MAKECMDGOALS),)
289 KBUILD_MODULES := 1
290endif
291
Sam Ravnborge579d352005-07-27 08:10:10 +0200292export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
294
295# Beautify output
296# ---------------------------------------------------------------------------
297#
298# Normally, we echo the whole command before executing it. By making
299# that echo $($(quiet)$(cmd)), we now have the possibility to set
300# $(quiet) to choose other forms of output instead, e.g.
301#
302# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
303# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
304#
305# If $(quiet) is empty, the whole command will be printed.
Masahiro Yamada38385f82014-04-28 16:26:18 +0900306# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200307# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308# the variable $(silent_cmd_cc_o_c) doesn't exist.
309#
Adrian Bunka58a4142006-01-10 00:08:17 +0100310# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311# for commands that shall be hidden in non-verbose mode.
312#
313# $(Q)ln $@ :<
314#
315# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
316# If KBUILD_VERBOSE equals 1 then the above command is displayed.
317
318ifeq ($(KBUILD_VERBOSE),1)
319 quiet =
320 Q =
321else
322 quiet=quiet_
323 Q = @
324endif
325
326# If the user is running make -s (silent mode), suppress echoing of
327# commands
328
Emil Medvee36aaea2014-01-06 02:58:40 -0600329ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
330ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
331 quiet=silent_
332endif
333else # make-3.8x
Jason Wessele6ac89f2012-01-05 16:46:30 -0600334ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 quiet=silent_
336endif
Emil Medvee36aaea2014-01-06 02:58:40 -0600337endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339export quiet Q KBUILD_VERBOSE
340
Behan Webster61163ef2013-09-03 22:27:23 -0400341ifneq ($(CC),)
342ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
343COMPILER := clang
344else
345COMPILER := gcc
346endif
347export COMPILER
348endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
350# Look for make include files relative to root of kernel src
351MAKEFLAGS += --include-dir=$(srctree)
352
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100353# We need some generic definitions (do not try to remake the file).
354$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800355include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
357# Make variables (CC, etc...)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358AS = $(CROSS_COMPILE)as
359LD = $(CROSS_COMPILE)ld
360CC = $(CROSS_COMPILE)gcc
361CPP = $(CC) -E
362AR = $(CROSS_COMPILE)ar
363NM = $(CROSS_COMPILE)nm
364STRIP = $(CROSS_COMPILE)strip
365OBJCOPY = $(CROSS_COMPILE)objcopy
366OBJDUMP = $(CROSS_COMPILE)objdump
367AWK = awk
368GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200369INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370DEPMOD = /sbin/depmod
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371PERL = perl
372CHECK = sparse
373
Hannes Eder80a7d1d92008-12-27 22:38:44 +0100374CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
375 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200376CFLAGS_MODULE =
377AFLAGS_MODULE =
378LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379CFLAGS_KERNEL =
380AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700381CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
383
David Howellsabbf1592012-10-02 18:01:26 +0100384# Use USERINCLUDE when you must reference the UAPI directories only.
385USERINCLUDE := \
386 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
387 -Iarch/$(hdr-arch)/include/generated/uapi \
388 -I$(srctree)/include/uapi \
389 -Iinclude/generated/uapi \
390 -include $(srctree)/include/linux/kconfig.h
391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392# Use LINUXINCLUDE when you must reference the include/ directory.
393# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100394LINUXINCLUDE := \
395 -I$(srctree)/arch/$(hdr-arch)/include \
396 -Iarch/$(hdr-arch)/include/generated \
397 $(if $(KBUILD_SRC), -I$(srctree)/include) \
398 -Iinclude \
399 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100401KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200403KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700404 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300405 -Werror-implicit-function-declaration \
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200406 -Wno-format-security
407
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200408KBUILD_AFLAGS_KERNEL :=
409KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200410KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200411KBUILD_AFLAGS_MODULE := -DMODULE
412KBUILD_CFLAGS_MODULE := -DMODULE
413KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700415# Read KERNELRELEASE from include/config/kernel.release (if it exists)
416KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Michal Marekcacd54e2011-05-30 13:36:07 +0200417KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100418
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200419export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100420export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200421export CPP AR NM STRIP OBJCOPY OBJDUMP
422export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200423export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Sam Ravnborg06c50402007-10-15 22:17:25 +0200425export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700426export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200427export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200428export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200429export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200430export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432# When compiling out-of-tree modules, put MODVERDIR in the module
433# tree rather than in the kernel tree. The kernel tree might
434# even be read-only.
435export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437# Files to ignore in find ... statements
438
Prarit Bhargavaae63b2d2014-02-06 07:51:42 -0500439export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
440 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
441 -prune -o
Jesper Juhl450c6072012-02-16 22:49:15 +0100442export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
443 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
445# ===========================================================================
446# Rules shared between *config targets and build targets
447
448# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500449PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450scripts_basic:
451 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500452 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200454# To avoid any implicit rule to kick in, define an empty command.
455scripts/basic/%: scripts_basic ;
456
Paul Smith4f193362006-03-05 17:14:10 -0500457PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200458# outputmakefile generates a Makefile in the output directory, if using a
459# separate output directory. This allows convenient use of make in the
460# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200462ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100463 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200464 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
465 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
466endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200468# Support for using generic headers in asm-generic
469PHONY += asm-generic
470asm-generic:
471 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
Catalin Marinas3c5994c2012-10-17 12:25:44 +0100472 src=asm obj=arch/$(SRCARCH)/include/generated/asm
473 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
474 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476# To make sure we do not include .config for any of the *config targets
477# catch them early, and hand them over to scripts/kconfig/Makefile
478# It is allowed to specify more targets when calling make, including
479# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200480# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481# Detect when mixed targets is specified, and make a second invocation
482# of make so .config is not included in this case either (for *config).
483
David Howells10b63952012-10-02 18:01:57 +0100484version_h := include/generated/uapi/linux/version.h
David Howellsd183e6f2012-10-02 18:01:56 +0100485
Roman Zippel3eb3c742007-01-10 14:45:28 +0100486no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800487 cscope gtags TAGS tags help %docs check% coccicheck \
David Howellsd183e6f2012-10-02 18:01:56 +0100488 $(version_h) headers_% archheaders archscripts \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700489 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
491config-targets := 0
492mixed-targets := 0
493dot-config := 1
494
495ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
496 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
497 dot-config := 0
498 endif
499endif
500
501ifeq ($(KBUILD_EXTMOD),)
502 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
503 config-targets := 1
504 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
505 mixed-targets := 1
506 endif
507 endif
508endif
509
510ifeq ($(mixed-targets),1)
511# ===========================================================================
512# We're called with mixed targets (*config and build targets).
513# Handle them one by one.
514
Masahiro Yamada9319f452014-04-09 15:51:35 +0900515PHONY += $(MAKECMDGOALS) __build_one_by_one
516
517$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
518 @:
519
520__build_one_by_one:
521 $(Q)set -e; \
522 for i in $(MAKECMDGOALS); do \
523 $(MAKE) -f $(srctree)/Makefile $$i; \
524 done
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
526else
527ifeq ($(config-targets),1)
528# ===========================================================================
529# *config targets only - make sure prerequisites are updated, and descend
530# in scripts/kconfig to make the *config target
531
532# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
533# KBUILD_DEFCONFIG may point out an alternative default configuration
534# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200535include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400536export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100538config: scripts_basic outputmakefile FORCE
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100539 $(Q)$(MAKE) $(build)=scripts/kconfig $@
540
541%config: scripts_basic outputmakefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 $(Q)$(MAKE) $(build)=scripts/kconfig $@
543
544else
545# ===========================================================================
546# Build targets only - this includes vmlinux, arch specific targets, clean
547# targets and others. In general all targets except *config targets.
548
549ifeq ($(KBUILD_EXTMOD),)
550# Additional helpers built in scripts/
551# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200552# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500553PHONY += scripts
Andreas Schwaba54292f2013-04-09 19:57:00 +0200554scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
555 asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 $(Q)$(MAKE) $(build)=$(@)
557
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558# Objects we will link into vmlinux / subdirs we need to visit
559init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100560drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561net-y := net/
562libs-y := lib/
563core-y := usr/
564endif # KBUILD_EXTMOD
565
566ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200567# Read in config
568-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200570ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571# Read in dependencies to all Kconfig* files, make sure to run
572# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700573-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700576$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Roman Zippelc955cca2006-06-08 22:12:39 -0700578# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100579# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200580# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100581# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100582include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
584else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200585# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200586# but do not care if they are up-to-date. Use auto.conf to trigger the test
587PHONY += include/config/auto.conf
588
589include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200590 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200591 echo >&2; \
592 echo >&2 " ERROR: Kernel configuration is invalid."; \
593 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
594 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
595 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200596 /bin/false)
597
598endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600else
601# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700602include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200603endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
605# The all: target is the default when no target is given on the
606# command line.
607# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200608# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609all: vmlinux
610
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200611include $(srctree)/arch/$(SRCARCH)/Makefile
612
613KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
614
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Arnd Bergmanne74fc972013-02-15 21:23:58 +0100616KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200618KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619endif
620
Andi Kleen1873e872012-03-28 11:51:18 -0700621ifdef CONFIG_READABLE_ASM
622# Disable optimizations that make assembler listings hard to read.
623# reorder blocks reorders the control in the function
624# ipa clone creates specialized cloned functions
625# partial inlining inlines only parts of functions
626KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
627 $(call cc-option,-fno-ipa-cp-clone,) \
628 $(call cc-option,-fno-partial-inlining)
629endif
630
Mike Frysinger08f67462009-06-04 16:29:08 -0700631ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100632KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
633endif
634
Kees Cook19952a92013-12-19 11:35:58 -0800635# Handle stack protector mode.
Kees Cook87796572013-12-19 11:35:59 -0800636ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
Kees Cook19952a92013-12-19 11:35:58 -0800637 stackp-flag := -fstack-protector
638 ifeq ($(call cc-option, $(stackp-flag)),)
Jan Beulich6c15b322014-02-25 15:01:48 -0800639 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
Fathi Boudra27b2a492014-02-25 15:01:46 -0800640 -fstack-protector not supported by compiler)
Kees Cook19952a92013-12-19 11:35:58 -0800641 endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800642else
643ifdef CONFIG_CC_STACKPROTECTOR_STRONG
Kees Cook87796572013-12-19 11:35:59 -0800644 stackp-flag := -fstack-protector-strong
645 ifeq ($(call cc-option, $(stackp-flag)),)
646 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
647 -fstack-protector-strong not supported by compiler)
648 endif
Kees Cook19952a92013-12-19 11:35:58 -0800649else
650 # Force off for distro compilers that enable stack protector by default.
651 stackp-flag := $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900652endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800653endif
Kees Cook19952a92013-12-19 11:35:58 -0800654KBUILD_CFLAGS += $(stackp-flag)
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100655
Behan Webster61163ef2013-09-03 22:27:23 -0400656ifeq ($(COMPILER),clang)
657KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
658KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
659KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
660KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
661KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
662# Quiet clang warning: comparison of unsigned expression < 0 is always false
663KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
664# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
665# source of a reference will be _MergedGlobals and not on of the whitelisted names.
666# See modpost pattern 2
667KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
668else
669
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400670# This warning generated too much noise in a regular build.
671# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200672KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Behan Webster61163ef2013-09-03 22:27:23 -0400673endif
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400674
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200676KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100678# Some targets (ARM with Thumb2, for example), can't be built with frame
679# pointers. For those, we don't have FUNCTION_TRACER automatically
680# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
681# incompatible with -fomit-frame-pointer with current GCC, so we don't use
682# -fomit-frame-pointer with FUNCTION_TRACER.
683ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200684KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100686endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200689KBUILD_CFLAGS += -g
Behan Webster22883282014-02-14 15:19:17 -0800690KBUILD_AFLAGS += -Wa,-gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691endif
692
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200693ifdef CONFIG_DEBUG_INFO_REDUCED
Andi Kleene82c4bb2013-02-07 13:58:40 -0800694KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
695 $(call cc-option,-fno-var-tracking)
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200696endif
697
Steven Rostedt606576c2008-10-06 19:06:12 -0400698ifdef CONFIG_FUNCTION_TRACER
Steven Rostedta2546fa2011-02-09 13:15:59 -0500699ifdef CONFIG_HAVE_FENTRY
700CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
701endif
702KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
703KBUILD_AFLAGS += $(CC_USING_FENTRY)
Steven Rostedt72441cb2010-10-13 17:12:30 -0400704ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400705 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400706 BUILD_C_RECORDMCOUNT := y
707 export BUILD_C_RECORDMCOUNT
708 endif
709endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200710endif
711
Sam Ravnborg91341d42008-01-21 21:31:44 +0100712# We trigger additional mismatches with less inlining
713ifdef CONFIG_DEBUG_SECTION_MISMATCH
714KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
715endif
716
Sam Ravnborge8e69932005-04-30 16:51:42 -0700717# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700718NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700719CHECKFLAGS += $(NOSTDINC_FLAGS)
720
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200722KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200724# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200725KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400727# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700728KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700729
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700730# conserve stack if available
731KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
732
Sergei Trofimovich80970472013-09-13 14:51:40 -0700733# disallow errors like 'EXPORT_GPL(foo);' with missing header
734KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
735
736# require functions to have arguments in prototypes, not empty 'int foo()'
737KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
738
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800739# Prohibit date/time macros, which would make the build non-deterministic
740KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
741
Michal Marek40df7592011-04-20 13:45:30 +0200742# use the deterministic mode of AR if available
743KBUILD_ARFLAGS := $(call ar-option,D)
744
Jason Baronbf5438fc2010-09-17 11:09:00 -0400745# check for 'asm goto'
746ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
747 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
748endif
749
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900750include $(srctree)/scripts/Makefile.extrawarn
751
Sam Ravnborg06c50402007-10-15 22:17:25 +0200752# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Ozan Çağlayan70cfe022012-08-14 19:00:54 +0300753KBUILD_CPPFLAGS += $(KCPPFLAGS)
754KBUILD_AFLAGS += $(KAFLAGS)
755KBUILD_CFLAGS += $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200756
Roland McGrath18991192007-07-19 01:48:40 -0700757# Use --build-id when available.
758LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200759 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200760KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700761LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
762
David Howells5d7d18f2009-03-04 11:59:07 -0800763ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200764LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800765endif
766
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200768# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769# set in the environment
770# Also any assignments in arch/$(ARCH)/Makefile take precedence over
771# this default value
772export KBUILD_IMAGE ?= vmlinux
773
774#
775# INSTALL_PATH specifies where to place the updated kernel and system map
776# images. Default is /boot, but you can set it to other values
777export INSTALL_PATH ?= /boot
778
779#
Jason Cooperf4d4ffc2013-12-01 23:56:28 +0000780# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
781# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
782# an argument if needed. Otherwise it defaults to the kernel install path
783#
784export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
785
786#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
788# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200789# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790#
791
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100792MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793export MODLIB
794
Theodore Ts'oac031f22006-06-21 20:53:09 -0400795#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900796# INSTALL_MOD_STRIP, if defined, will cause modules to be
797# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
798# the default option --strip-debug will be used. Otherwise,
799# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100800
Theodore Ts'oac031f22006-06-21 20:53:09 -0400801ifdef INSTALL_MOD_STRIP
802ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100803mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400804else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100805mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400806endif # INSTALL_MOD_STRIP=1
807else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100808mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400809endif # INSTALL_MOD_STRIP
810export mod_strip_cmd
811
P J P1bf49dd2013-11-12 15:11:44 -0800812# Select initial ramdisk compression format, default is gzip(1).
813# This shall be used by the dracut(8) tool while creating an initramfs image.
814#
Jan Beulich7ac18152013-12-18 17:08:57 -0800815INITRD_COMPRESS-y := gzip
816INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
817INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
818INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
819INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
820INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
Linus Torvaldsb7000ad2013-12-20 16:52:45 -0800821# do not export INITRD_COMPRESS, since we didn't actually
822# choose a sane default compression above.
823# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
Michal Marekd9d8d7e2013-01-25 13:41:31 +1030825ifdef CONFIG_MODULE_SIG_ALL
Rusty Russelle2a666d2012-10-19 11:53:15 +1030826MODSECKEY = ./signing_key.priv
827MODPUBKEY = ./signing_key.x509
828export MODPUBKEY
Michal Marek4bc94102013-01-25 13:41:12 +1030829mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
Rusty Russelle2a666d2012-10-19 11:53:15 +1030830else
831mod_sign_cmd = true
832endif
833export mod_sign_cmd
834
835
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100837core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
839vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
840 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
841 $(net-y) $(net-m) $(libs-y) $(libs-m)))
842
843vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
844 $(init-n) $(init-) \
845 $(core-n) $(core-) $(drivers-n) $(drivers-) \
846 $(net-n) $(net-) $(libs-n) $(libs-))))
847
848init-y := $(patsubst %/, %/built-in.o, $(init-y))
849core-y := $(patsubst %/, %/built-in.o, $(core-y))
850drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
851net-y := $(patsubst %/, %/built-in.o, $(net-y))
852libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
853libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
854libs-y := $(libs-y1) $(libs-y2)
855
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200856# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200857export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
858export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
859export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200860export LDFLAGS_vmlinux
Michal Marek6615d6c2013-04-12 14:12:50 +0200861# used by scripts/pacmage/Makefile
862export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200864vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200866# Final link of vmlinux
867 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
868quiet_cmd_link-vmlinux = LINK $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200870# Include targets which we want to
871# execute if the rest of the kernel build went well.
872vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700873ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100874 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700875endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700876ifdef CONFIG_SAMPLES
877 $(Q)$(MAKE) $(build)=samples
878endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700879ifdef CONFIG_BUILD_DOCSRC
880 $(Q)$(MAKE) $(build)=Documentation
881endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200882 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200883
Masahiro Yamada38385f82014-04-28 16:26:18 +0900884# The actual objects are generated when descending,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200886$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887
888# Handle descending into subdirectories listed in $(vmlinux-dirs)
889# Preset locale variables to speed up the build process. Limit locale
890# tweaks to this spot to avoid wrong language settings when running
891# make menuconfig etc.
892# Error messages still appears in the original language
893
Paul Smith4f193362006-03-05 17:14:10 -0500894PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200895$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 $(Q)$(MAKE) $(build)=$@
897
Michal Marek0d0e7712013-07-11 15:34:51 +0200898define filechk_kernel.release
899 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
900endef
901
Geert Uytterhoeven83a35e32013-06-28 11:27:31 +0200902# Store (new) KERNELRELEASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700903include/config/kernel.release: include/config/auto.conf FORCE
Michal Marek0d0e7712013-07-11 15:34:51 +0200904 $(call filechk,kernel.release)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100905
906
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200908# or the modules are listed in "prepare".
909# A multi level approach is used. prepareN is processed before prepareN-1.
910# archprepare is used in arch Makefiles and when processed asm symlink,
911# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200913# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500914PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200915
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200916# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917# and if so do:
918# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700919prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500921 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700922 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +0200923 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
924 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 /bin/false; \
926 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927endif
928
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200929# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200930prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
David Howellsd183e6f2012-10-02 18:01:56 +0100932prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200933 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200934 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300936archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200937
938prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200939 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200940
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800942prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944# Generate some files
945# ---------------------------------------------------------------------------
946
947# KERNELRELEASE can change from a few different places, meaning version.h
948# needs to be updated, so this check is forced on all builds
949
950uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200951define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200953 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
954 exit 1; \
955 fi; \
956 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957endef
958
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200959define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +0100960 (echo \#define LINUX_VERSION_CODE $(shell \
961 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200962 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
963endef
964
David Howellsd183e6f2012-10-02 18:01:56 +0100965$(version_h): $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 $(call filechk,version.h)
967
Sam Ravnborg273b2812009-10-18 00:52:28 +0200968include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200969 $(call filechk,utsrelease.h)
970
Vegard Nossum179efcb2008-12-16 12:33:43 +0100971PHONY += headerdep
972headerdep:
Peter Foley9663d982011-04-26 17:17:11 -0400973 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
974 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +0100975
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976# ---------------------------------------------------------------------------
977
Paul Smith4f193362006-03-05 17:14:10 -0500978PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979depend dep:
980 @echo '*** Warning: make $@ is unnecessary now.'
981
982# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +0300983# Firmware install
984INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
985export INSTALL_FW_PATH
986
987PHONY += firmware_install
988firmware_install: FORCE
989 @mkdir -p $(objtree)/firmware
990 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
991
992# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100993# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +0100994
Sam Ravnborge6883b12008-06-05 16:43:46 +0200995#Default location for installed headers
996export INSTALL_HDR_PATH = $(objtree)/usr
997
Sam Ravnborge6883b12008-06-05 16:43:46 +0200998hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200999
1000# If we do an all arch process set dst to asm-$(hdr-arch)
1001hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001002
H. Peter Anvin052ad272011-11-17 13:17:35 -08001003PHONY += archheaders
1004archheaders:
1005
H. Peter Anvin6520fe52012-05-08 21:22:24 +03001006PHONY += archscripts
1007archscripts:
1008
Sam Ravnborge6883b12008-06-05 16:43:46 +02001009PHONY += __headers
David Howellsd183e6f2012-10-02 18:01:56 +01001010__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -07001011 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001012
1013PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001014headers_install_all:
1015 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001016
David Woodhouse8d730cf2006-06-18 11:58:39 +01001017PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001018headers_install: __headers
David Howells10b63952012-10-02 18:01:57 +01001019 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1020 $(error Headers not exportable for the $(SRCARCH) architecture))
1021 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1022 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001023
Mike Frysinger1f857122007-02-14 00:33:02 -08001024PHONY += headers_check_all
1025headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001026 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001027
David Woodhouse68475352006-06-18 12:02:10 +01001028PHONY += headers_check
1029headers_check: headers_install
David Howells10b63952012-10-02 18:01:57 +01001030 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1031 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001032
David Woodhouse8d730cf2006-06-18 11:58:39 +01001033# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034# Modules
1035
1036ifdef CONFIG_MODULES
1037
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001038# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039
Michal Marek73d13932010-03-10 12:28:58 +01001040all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001042# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001043#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001044# A module can be listed more than once in obj-m resulting in
1045# duplicate lines in modules.order files. Those are removed
1046# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
Paul Smith4f193362006-03-05 17:14:10 -05001048PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001049modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001050 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001051 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001052 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001053 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054
Michal Mareka6c36632010-03-08 10:07:12 +01001055modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1056 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1057
Michal Marek73d13932010-03-10 12:28:58 +01001058%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001059 $(Q)$(MAKE) $(modbuiltin)=$*
1060
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
1062# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001063PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001064modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
1066# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001067PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068modules_install: _modinst_ _modinst_post
1069
Paul Smith4f193362006-03-05 17:14:10 -05001070PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001071_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 @rm -rf $(MODLIB)/kernel
1073 @rm -f $(MODLIB)/source
1074 @mkdir -p $(MODLIB)/kernel
Michal Marek890676c2014-04-25 17:36:14 +02001075 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1077 rm -f $(MODLIB)/build ; \
Michal Marek7e1c0472014-04-25 17:29:45 +02001078 ln -s $(CURDIR) $(MODLIB)/build ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001080 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001081 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001082 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001084# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085# boot a modules.dep even before / is mounted read-write. However the
1086# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001087PHONY += _modinst_post
Linus Torvalds6d128e12013-07-10 19:02:51 -07001088_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001089 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001090 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091
Josh Boyerd890f512012-11-05 09:09:24 +10301092ifeq ($(CONFIG_MODULE_SIG), y)
1093PHONY += modules_sign
1094modules_sign:
1095 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1096endif
1097
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098else # CONFIG_MODULES
1099
1100# Modules not configured
1101# ---------------------------------------------------------------------------
1102
1103modules modules_install: FORCE
Michal Marek5369f552012-07-07 23:04:40 +02001104 @echo >&2
1105 @echo >&2 "The present kernel configuration has modules disabled."
1106 @echo >&2 "Type 'make config' and enable loadable module support."
1107 @echo >&2 "Then build a kernel with module support enabled."
1108 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 @exit 1
1110
1111endif # CONFIG_MODULES
1112
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113###
1114# Cleaning is done on three levels.
1115# make clean Delete most generated files
1116# Leave enough to build external modules
1117# make mrproper Delete the current configuration, and all generated files
1118# make distclean Remove editor backup files, patch leftover files and the like
1119
1120# Directories & files removed with 'make clean'
1121CLEAN_DIRS += $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122
1123# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001124MRPROPER_DIRS += include/config usr/include include/generated \
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001125 arch/*/include/generated .tmp_objdiff
David Howellsd183e6f2012-10-02 18:01:56 +01001126MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
Rusty Russelld5b71932012-10-02 14:35:24 +09301127 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1128 signing_key.priv signing_key.x509 x509.genkey \
1129 extra_certificates signing_key.x509.keyid \
Paul Gortmaker9c8cdb72014-02-13 16:28:58 -05001130 signing_key.x509.signer include/linux/version.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131
1132# clean - Delete most, but leave enough to build external modules
1133#
1134clean: rm-dirs := $(CLEAN_DIRS)
1135clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -07001136clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137
Pawel Mollbd1ee802012-10-29 11:23:02 +00001138PHONY += $(clean-dirs) clean archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139$(clean-dirs):
1140 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1141
Pawel Mollbd1ee802012-10-29 11:23:02 +00001142vmlinuxclean:
1143 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1144
1145clean: archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146
1147# mrproper - Delete all generated files, including .config
1148#
1149mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1150mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1151mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1152
Paul Smith4f193362006-03-05 17:14:10 -05001153PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154$(mrproper-dirs):
1155 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1156
1157mrproper: clean archmrproper $(mrproper-dirs)
1158 $(call cmd,rmdirs)
1159 $(call cmd,rmfiles)
1160
1161# distclean
1162#
Paul Smith4f193362006-03-05 17:14:10 -05001163PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164
1165distclean: mrproper
1166 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001167 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Masahiro Yamadaa03fcb502014-03-28 16:36:12 +09001169 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 -type f -print | xargs rm -f
1171
1172
1173# Packaging of the kernel to various formats
1174# ---------------------------------------------------------------------------
1175# rpm target kept for backward compatibility
1176package-dir := $(srctree)/scripts/package
1177
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001178%src-pkg: FORCE
1179 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001180%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001181 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001182rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001183 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184
1185
1186# Brief documentation of the typical targets used
1187# ---------------------------------------------------------------------------
1188
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001189boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001191board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1192board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193
1194help:
1195 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001196 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001197 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001198 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001199 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 @echo ''
1201 @echo 'Configuration targets:'
1202 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1203 @echo ''
1204 @echo 'Other generic targets:'
1205 @echo ' all - Build all targets marked with [*]'
1206 @echo '* vmlinux - Build the bare kernel'
1207 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001208 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001209 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1210 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001212 @echo ' dir/file.[oisS] - Build specified target only'
1213 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1214 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001215 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001216 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 @echo ' tags/TAGS - Generate tags file for editors'
1218 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001219 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001220 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001221 @echo ' kernelversion - Output the version stored in Makefile'
Mike Marciniszync398ff02013-06-24 08:48:37 -04001222 @echo ' image_name - Output the image name'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001223 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001224 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001225 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 @echo ' checkstack - Generate a list of stack hogs'
1228 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001229 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001230 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001231 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001232 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001233 @echo ' headerdep - Detect inclusion cycles in headers'
1234 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1235 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001237 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 @echo ''
1239 @echo 'Documentation targets:'
1240 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1241 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001242 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001244 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 @echo ''
1246 @$(if $(boards), \
1247 $(foreach b, $(boards), \
1248 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1249 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001250 @$(if $(board-dirs), \
1251 $(foreach b, $(board-dirs), \
1252 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1253 printf " %-16s - Show all of the above\\n" help-boards; \
1254 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255
1256 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001257 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001259 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1260 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001261 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001262 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1263 @echo ' 1: warnings which may be relevant and do not occur too often'
1264 @echo ' 2: warnings which occur quite often but may still be relevant'
1265 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001266 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 @echo ''
1268 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1269 @echo 'For further info see the ./README file'
1270
1271
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001272help-board-dirs := $(addprefix help-,$(board-dirs))
1273
1274help-boards: $(help-board-dirs)
1275
1276boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1277
1278$(help-board-dirs): help-%:
1279 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1280 @$(if $(boards-per-dir), \
1281 $(foreach b, $(boards-per-dir), \
1282 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1283 echo '')
1284
1285
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286# Documentation targets
1287# ---------------------------------------------------------------------------
1288%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001289 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1291
1292else # KBUILD_EXTMOD
1293
1294###
1295# External module support.
1296# When building external modules the kernel used as basis is considered
1297# read-only, and no consistency checks are made and the make
1298# system is not used on the basis kernel. If updates are required
1299# in the basis kernel ordinary make commands (without M=...) must
1300# be used.
1301#
1302# The following are the only valid targets when building external
1303# modules.
1304# make M=dir clean Delete all automatically generated files
1305# make M=dir modules Make all modules in specified dir
1306# make M=dir Same as 'make M=dir modules'
1307# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001308# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309# Assumes install directory is already created
1310
1311# We are always building modules
1312KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001313PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001315 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316
Paul Smith4f193362006-03-05 17:14:10 -05001317PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318$(objtree)/Module.symvers:
1319 @test -e $(objtree)/Module.symvers || ( \
1320 echo; \
1321 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1322 echo " is missing; modules will have no dependencies and modversions."; \
1323 echo )
1324
1325module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001326PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327$(module-dirs): crmodverdir $(objtree)/Module.symvers
1328 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1329
1330modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001331 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001332 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333
Paul Smith4f193362006-03-05 17:14:10 -05001334PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001335modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001336
Paul Smith4f193362006-03-05 17:14:10 -05001337install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1338PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001339_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001340 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001341 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342
Paul Smith4f193362006-03-05 17:14:10 -05001343PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001344_emodinst_post: _emodinst_
1345 $(call cmd,depmod)
1346
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1348
Paul Smith4f193362006-03-05 17:14:10 -05001349PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350$(clean-dirs):
1351 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1352
1353clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001354clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355
1356help:
1357 @echo ' Building external modules.'
1358 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1359 @echo ''
1360 @echo ' modules - default target, build the module(s)'
1361 @echo ' modules_install - install the module'
1362 @echo ' clean - remove generated files in module directory only'
1363 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001364
1365# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001366PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001367prepare: ;
1368scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369endif # KBUILD_EXTMOD
1370
Michal Marek88d7be02010-09-06 12:00:08 +02001371clean: $(clean-dirs)
1372 $(call cmd,rmdirs)
1373 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001374 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001375 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
David Howellsaddbcdb2012-09-26 10:09:50 +01001376 -o -name '*.ko.*' \
Michal Marek88d7be02010-09-06 12:00:08 +02001377 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1378 -o -name '*.symtypes' -o -name 'modules.order' \
1379 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1380 -o -name '*.gcno' \) -type f -print | xargs rm -f
1381
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382# Generate tags for editors
1383# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001384quiet_cmd_tags = GEN $@
1385 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001387tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388 $(call cmd,tags)
1389
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390# Scripts to check various things for consistency
1391# ---------------------------------------------------------------------------
1392
Peter Foley279f3dd2011-04-26 17:15:01 -04001393PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1394
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001396 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001398 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399
1400versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001401 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001403 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404
Nicolas Palix74425ee2010-06-06 17:15:01 +02001405coccicheck:
1406 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1407
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408namespacecheck:
1409 $(PERL) $(srctree)/scripts/namespace.pl
1410
Adrian Bunk295ac052007-08-24 23:04:56 +02001411export_report:
1412 $(PERL) $(srctree)/scripts/export_report.pl
1413
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414endif #ifeq ($(config-targets),1)
1415endif #ifeq ($(mixed-targets),1)
1416
Mike Marciniszync398ff02013-06-24 08:48:37 -04001417PHONY += checkstack kernelrelease kernelversion image_name
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001418
Jeff Dike011e3a92006-12-13 00:34:12 -08001419# UML needs a little special treatment here. It wants to use the host
1420# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1421# else wants $(ARCH), including people doing cross-builds, which means
1422# that $(SUBARCH) doesn't work here.
1423ifeq ($(ARCH), um)
1424CHECKSTACK_ARCH := $(SUBARCH)
1425else
1426CHECKSTACK_ARCH := $(ARCH)
1427endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428checkstack:
1429 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001430 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001432kernelrelease:
1433 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001434
Sam Ravnborgcb584552006-01-09 21:20:34 +01001435kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001436 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437
Mike Marciniszync398ff02013-06-24 08:48:37 -04001438image_name:
1439 @echo $(KBUILD_IMAGE)
1440
Borislav Petkovea01fa92012-04-11 18:36:18 +02001441# Clear a bunch of variables before executing the submake
1442tools/: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001443 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001444 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
Borislav Petkovea01fa92012-04-11 18:36:18 +02001445
1446tools/%: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001447 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001448 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
Borislav Petkovea01fa92012-04-11 18:36:18 +02001449
Sam Ravnborg06300b22006-01-25 07:13:18 +01001450# Single targets
1451# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001452# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001453# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001454# - build with separate output dir 'make O=...'
1455# - external modules
1456#
1457# target-dir => where to store outputfile
1458# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001459
Sam Ravnborg06300b22006-01-25 07:13:18 +01001460ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001461 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001462 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001463else
1464 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001465 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1466 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001467endif
1468
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001469%.s: %.c prepare scripts FORCE
1470 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1471%.i: %.c prepare scripts FORCE
1472 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1473%.o: %.c prepare scripts FORCE
1474 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1475%.lst: %.c prepare scripts FORCE
1476 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1477%.s: %.S prepare scripts FORCE
1478 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1479%.o: %.S prepare scripts FORCE
1480 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001481%.symtypes: %.c prepare scripts FORCE
1482 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001483
1484# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001485/: prepare scripts FORCE
1486 $(cmd_crmodverdir)
1487 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1488 $(build)=$(build-dir)
1489%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001490 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001491 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001492 $(build)=$(build-dir)
1493%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001494 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001495 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001496 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001497 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001498
Masahiro Yamada38385f82014-04-28 16:26:18 +09001499# FIXME Should go into a make.lib or something
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500# ===========================================================================
1501
1502quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1503 cmd_rmdirs = rm -rf $(rm-dirs)
1504
1505quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1506 cmd_rmfiles = rm -f $(rm-files)
1507
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001508# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001509quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001510 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
Rusty Russellb92021b2013-03-15 15:04:17 +10301511 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001512
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001513# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001514# clean it up only when building all modules
1515cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1516 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518# read all saved command lines
1519
1520targets := $(wildcard $(sort $(targets)))
1521cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1522
1523ifneq ($(cmd_files),)
1524 $(cmd_files): ; # Do not try to update included dependency files
1525 include $(cmd_files)
1526endif
1527
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1529# Usage:
1530# $(Q)$(MAKE) $(clean)=dir
1531clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1532
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533endif # skip-makefile
1534
Paul Smith4f193362006-03-05 17:14:10 -05001535PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001537
Paul Smith4f193362006-03-05 17:14:10 -05001538# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001539# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001540.PHONY: $(PHONY)