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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 Torvalds71715112014-06-15 17:45:28 -10004EXTRAVERSION = -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
Michal Marek066b7ed2014-07-04 14:29:30 +020044# Beautify output
45# ---------------------------------------------------------------------------
46#
47# Normally, we echo the whole command before executing it. By making
48# that echo $($(quiet)$(cmd)), we now have the possibility to set
49# $(quiet) to choose other forms of output instead, e.g.
50#
51# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
52# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
53#
54# If $(quiet) is empty, the whole command will be printed.
55# If it is set to "quiet_", only the short version will be printed.
56# If it is set to "silent_", nothing will be printed at all, since
57# the variable $(silent_cmd_cc_o_c) doesn't exist.
58#
59# A simple variant is to prefix commands with $(Q) - that's useful
60# for commands that shall be hidden in non-verbose mode.
61#
62# $(Q)ln $@ :<
63#
64# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
65# If KBUILD_VERBOSE equals 1 then the above command is displayed.
66#
Linus Torvalds1da177e2005-04-16 15:20:36 -070067# To put more focus on warnings, be less verbose as default
68# Use 'make V=1' to see the full commands
69
Cheng Renquanb8b06182009-05-26 16:03:07 +080070ifeq ("$(origin V)", "command line")
71 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072endif
73ifndef KBUILD_VERBOSE
74 KBUILD_VERBOSE = 0
75endif
76
Michal Marek066b7ed2014-07-04 14:29:30 +020077ifeq ($(KBUILD_VERBOSE),1)
78 quiet =
79 Q =
80else
81 quiet=quiet_
82 Q = @
83endif
84
85# If the user is running make -s (silent mode), suppress echoing of
86# commands
87
88ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
89ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
90 quiet=silent_
91endif
92else # make-3.8x
93ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
94 quiet=silent_
95endif
96endif
97
98export quiet Q KBUILD_VERBOSE
99
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -0400100# Call a source code checker (by default, "sparse") as part of the
101# C compilation.
102#
103# Use 'make C=1' to enable checking of only re-compiled files.
104# Use 'make C=2' to enable checking of *all* source files, regardless
105# of whether they are re-compiled or not.
106#
107# See the file "Documentation/sparse.txt" for more details, including
108# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Cheng Renquanb8b06182009-05-26 16:03:07 +0800110ifeq ("$(origin C)", "command line")
111 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112endif
113ifndef KBUILD_CHECKSRC
114 KBUILD_CHECKSRC = 0
115endif
116
117# Use make M=dir to specify directory of external module to build
118# Old syntax make ... SUBDIRS=$PWD is still supported
119# Setting the environment variable KBUILD_EXTMOD take precedence
120ifdef SUBDIRS
121 KBUILD_EXTMOD ?= $(SUBDIRS)
122endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Cheng Renquanb8b06182009-05-26 16:03:07 +0800124ifeq ("$(origin M)", "command line")
125 KBUILD_EXTMOD := $(M)
126endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
128# kbuild supports saving output files in a separate directory.
129# To locate output files in a separate directory two syntaxes are supported.
130# In both cases the working directory must be the root of the kernel src.
131# 1) O=
132# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200133#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134# 2) Set KBUILD_OUTPUT
135# Set the environment variable KBUILD_OUTPUT to point to the directory
136# where the output files shall be placed.
137# export KBUILD_OUTPUT=dir/to/store/output/files/
138# make
139#
140# The O= assignment takes precedence over the KBUILD_OUTPUT environment
141# variable.
142
143
144# KBUILD_SRC is set on invocation of make in OBJ directory
145# KBUILD_SRC is not intended to be used by the regular user (for now)
146ifeq ($(KBUILD_SRC),)
147
148# OK, Make called in directory where kernel src resides
149# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800150ifeq ("$(origin O)", "command line")
151 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152endif
153
154# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500155PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156_all:
157
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100158# Cancel implicit rules on top Makefile
159$(CURDIR)/Makefile Makefile: ;
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161ifneq ($(KBUILD_OUTPUT),)
162# Invoke a second make in the output directory, passing relevant variables
163# check that the output directory actually exists
164saved-output := $(KBUILD_OUTPUT)
Masahiro Yamada1c9e70a2014-03-31 16:41:36 +0900165KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
166 && /bin/pwd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167$(if $(KBUILD_OUTPUT),, \
Masahiro Yamada1c9e70a2014-03-31 16:41:36 +0900168 $(error failed to create output directory "$(saved-output)"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Milton Miller0b357862007-09-21 18:09:02 -0500170PHONY += $(MAKECMDGOALS) sub-make
171
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100172$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Charles Keepax16f89092012-10-15 13:49:12 +0100173 @:
Milton Miller0b357862007-09-21 18:09:02 -0500174
Michal Marekc2e28dc2014-07-02 14:28:26 +0200175# Fake the "Entering directory" message once, so that IDEs/editors are
176# able to understand relative filenames.
Michal Marek066b7ed2014-07-04 14:29:30 +0200177 echodir := @echo
178 quiet_echodir := @echo
179silent_echodir := @:
Milton Miller0b357862007-09-21 18:09:02 -0500180sub-make: FORCE
Michal Marek066b7ed2014-07-04 14:29:30 +0200181 $($(quiet)echodir) "make[1]: Entering directory \`$(KBUILD_OUTPUT)'"
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200182 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
183 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500184 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
185 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
187# Leave processing to above invocation of make
188skip-makefile := 1
189endif # ifneq ($(KBUILD_OUTPUT),)
190endif # ifeq ($(KBUILD_SRC),)
191
192# We process the rest of the Makefile if this is the final invocation of make
193ifeq ($(skip-makefile),)
194
195# If building an external module we do not care about the all: rule
196# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500197PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198ifeq ($(KBUILD_EXTMOD),)
199_all: all
200else
201_all: modules
202endif
203
Michal Marek9da07632014-04-25 23:25:18 +0200204ifeq ($(KBUILD_SRC),)
205 # building in the source tree
206 srctree := .
207else
208 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
209 # building in a subdirectory of the source tree
210 srctree := ..
211 else
212 srctree := $(KBUILD_SRC)
213 endif
214endif
Michal Marek7e1c0472014-04-25 17:29:45 +0200215objtree := .
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216src := $(srctree)
217obj := $(objtree)
218
Mattia Dongili0f558c32006-02-19 13:50:37 +0100219VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
Amerigo Wang11294232009-06-19 03:40:26 -0400221export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224# SUBARCH tells the usermode build what the underlying arch is. That is set
225# first, and if a usermode build is happening, the "ARCH=um" on the command
226# line overrides the setting of ARCH below. If a native build is happening,
Masahiro Yamada38385f82014-04-28 16:26:18 +0900227# then ARCH is assigned, getting whatever value it gets normally, and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228# SUBARCH is subsequently ignored.
229
David Woodhouseffee0de2012-12-20 21:51:55 +0000230SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
231 -e s/sun4u/sparc64/ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800233 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900234 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Will Deaconf1b99392013-01-18 19:00:47 +0000235 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
237# Cross compiling and selecting different set of gcc/bin-utils
238# ---------------------------------------------------------------------------
239#
240# When performing cross compilation for other architectures ARCH shall be set
241# to the target architecture. (See arch/* for the possibilities).
242# ARCH can be set during invocation of make:
243# make ARCH=ia64
244# Another way is to have ARCH set in the environment.
245# The default ARCH is the host where make is executed.
246
247# CROSS_COMPILE specify the prefix used for all executables used
248# during compilation. Only gcc and related bin-utils executables
249# are prefixed with $(CROSS_COMPILE).
250# CROSS_COMPILE can be set on the command line
251# make CROSS_COMPILE=ia64-linux-
252# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800253# A third alternative is to store a setting in .config so that plain
254# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255# Default value for CROSS_COMPILE is not to prefix executables
256# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200257ARCH ?= $(SUBARCH)
Roland McGrath84336462009-12-21 16:24:06 -0800258CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200261UTS_MACHINE := $(ARCH)
262SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
Sam Ravnborgd746d642007-11-12 20:14:19 +0100264# Additional ARCH settings for x86
265ifeq ($(ARCH),i386)
266 SRCARCH := x86
267endif
268ifeq ($(ARCH),x86_64)
269 SRCARCH := x86
270endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200271
Sam Ravnborg5e538792008-12-02 23:17:12 -0800272# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000273ifeq ($(ARCH),sparc32)
274 SRCARCH := sparc
275endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200276ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800277 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200278endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200279
Paul Mundt3cc000b2009-04-11 08:39:27 +0900280# Additional ARCH settings for sh
281ifeq ($(ARCH),sh64)
282 SRCARCH := sh
283endif
284
Chris Metcalf18aecc22011-05-04 14:38:26 -0400285# Additional ARCH settings for tile
Chris Metcalf6738d322011-05-25 15:24:00 -0400286ifeq ($(ARCH),tilepro)
287 SRCARCH := tile
288endif
Chris Metcalf18aecc22011-05-04 14:38:26 -0400289ifeq ($(ARCH),tilegx)
290 SRCARCH := tile
291endif
292
Sam Ravnborg5e538792008-12-02 23:17:12 -0800293# Where to locate arch specific headers
294hdr-arch := $(SRCARCH)
295
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700296KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500297export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299# SHELL used by kbuild
300CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
301 else if [ -x /bin/bash ]; then echo /bin/bash; \
302 else echo sh; fi ; fi)
303
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200304HOSTCC = gcc
305HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800306HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200307HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
Behan Webster61163ef2013-09-03 22:27:23 -0400309ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
310HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
311 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
312endif
313
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200314# Decide whether to build built-in, modular, or both.
315# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
317KBUILD_MODULES :=
318KBUILD_BUILTIN := 1
319
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900320# If we have only "make modules", don't compile built-in objects.
321# When we're building modules with modversions, we need to consider
322# the built-in objects during the descend as well, in order to
323# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
325ifeq ($(MAKECMDGOALS),modules)
326 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
327endif
328
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900329# If we have "make <whatever> modules", compile modules
330# in addition to whatever we do anyway.
331# Just "make" or "make all" shall build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
333ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
334 KBUILD_MODULES := 1
335endif
336
337ifeq ($(MAKECMDGOALS),)
338 KBUILD_MODULES := 1
339endif
340
Sam Ravnborge579d352005-07-27 08:10:10 +0200341export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
343
Behan Webster61163ef2013-09-03 22:27:23 -0400344ifneq ($(CC),)
345ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
346COMPILER := clang
347else
348COMPILER := gcc
349endif
350export COMPILER
351endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
353# Look for make include files relative to root of kernel src
354MAKEFLAGS += --include-dir=$(srctree)
355
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100356# We need some generic definitions (do not try to remake the file).
357$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800358include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360# Make variables (CC, etc...)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361AS = $(CROSS_COMPILE)as
362LD = $(CROSS_COMPILE)ld
363CC = $(CROSS_COMPILE)gcc
364CPP = $(CC) -E
365AR = $(CROSS_COMPILE)ar
366NM = $(CROSS_COMPILE)nm
367STRIP = $(CROSS_COMPILE)strip
368OBJCOPY = $(CROSS_COMPILE)objcopy
369OBJDUMP = $(CROSS_COMPILE)objdump
370AWK = awk
371GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200372INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373DEPMOD = /sbin/depmod
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374PERL = perl
375CHECK = sparse
376
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100377CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
378 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200379CFLAGS_MODULE =
380AFLAGS_MODULE =
381LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382CFLAGS_KERNEL =
383AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700384CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386
David Howellsabbf1592012-10-02 18:01:26 +0100387# Use USERINCLUDE when you must reference the UAPI directories only.
388USERINCLUDE := \
389 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
390 -Iarch/$(hdr-arch)/include/generated/uapi \
391 -I$(srctree)/include/uapi \
392 -Iinclude/generated/uapi \
393 -include $(srctree)/include/linux/kconfig.h
394
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395# Use LINUXINCLUDE when you must reference the include/ directory.
396# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100397LINUXINCLUDE := \
398 -I$(srctree)/arch/$(hdr-arch)/include \
399 -Iarch/$(hdr-arch)/include/generated \
400 $(if $(KBUILD_SRC), -I$(srctree)/include) \
401 -Iinclude \
402 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100404KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200406KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700407 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300408 -Werror-implicit-function-declaration \
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200409 -Wno-format-security
410
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200411KBUILD_AFLAGS_KERNEL :=
412KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200413KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200414KBUILD_AFLAGS_MODULE := -DMODULE
415KBUILD_CFLAGS_MODULE := -DMODULE
416KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700418# Read KERNELRELEASE from include/config/kernel.release (if it exists)
419KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Michal Marekcacd54e2011-05-30 13:36:07 +0200420KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100421
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200422export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100423export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200424export CPP AR NM STRIP OBJCOPY OBJDUMP
425export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200426export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
Sam Ravnborg06c50402007-10-15 22:17:25 +0200428export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700429export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200430export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200431export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200432export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200433export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
435# When compiling out-of-tree modules, put MODVERDIR in the module
436# tree rather than in the kernel tree. The kernel tree might
437# even be read-only.
438export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
439
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440# Files to ignore in find ... statements
441
Prarit Bhargavaae63b2d2014-02-06 07:51:42 -0500442export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
443 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
444 -prune -o
Jesper Juhl450c6072012-02-16 22:49:15 +0100445export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
446 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
448# ===========================================================================
449# Rules shared between *config targets and build targets
450
451# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500452PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453scripts_basic:
454 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500455 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200457# To avoid any implicit rule to kick in, define an empty command.
458scripts/basic/%: scripts_basic ;
459
Paul Smith4f193362006-03-05 17:14:10 -0500460PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200461# outputmakefile generates a Makefile in the output directory, if using a
462# separate output directory. This allows convenient use of make in the
463# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200465ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100466 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200467 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
468 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
469endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200471# Support for using generic headers in asm-generic
472PHONY += asm-generic
473asm-generic:
474 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
Catalin Marinas3c5994c2012-10-17 12:25:44 +0100475 src=asm obj=arch/$(SRCARCH)/include/generated/asm
476 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
477 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200478
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479# To make sure we do not include .config for any of the *config targets
480# catch them early, and hand them over to scripts/kconfig/Makefile
481# It is allowed to specify more targets when calling make, including
482# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200483# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484# Detect when mixed targets is specified, and make a second invocation
485# of make so .config is not included in this case either (for *config).
486
David Howells10b63952012-10-02 18:01:57 +0100487version_h := include/generated/uapi/linux/version.h
David Howellsd183e6f2012-10-02 18:01:56 +0100488
Roman Zippel3eb3c742007-01-10 14:45:28 +0100489no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800490 cscope gtags TAGS tags help %docs check% coccicheck \
David Howellsd183e6f2012-10-02 18:01:56 +0100491 $(version_h) headers_% archheaders archscripts \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700492 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
494config-targets := 0
495mixed-targets := 0
496dot-config := 1
497
498ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
499 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
500 dot-config := 0
501 endif
502endif
503
504ifeq ($(KBUILD_EXTMOD),)
505 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
506 config-targets := 1
507 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
508 mixed-targets := 1
509 endif
510 endif
511endif
512
513ifeq ($(mixed-targets),1)
514# ===========================================================================
515# We're called with mixed targets (*config and build targets).
516# Handle them one by one.
517
Masahiro Yamada9319f452014-04-09 15:51:35 +0900518PHONY += $(MAKECMDGOALS) __build_one_by_one
519
520$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
521 @:
522
523__build_one_by_one:
524 $(Q)set -e; \
525 for i in $(MAKECMDGOALS); do \
526 $(MAKE) -f $(srctree)/Makefile $$i; \
527 done
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
529else
530ifeq ($(config-targets),1)
531# ===========================================================================
532# *config targets only - make sure prerequisites are updated, and descend
533# in scripts/kconfig to make the *config target
534
535# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
536# KBUILD_DEFCONFIG may point out an alternative default configuration
537# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200538include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400539export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100541config: scripts_basic outputmakefile FORCE
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100542 $(Q)$(MAKE) $(build)=scripts/kconfig $@
543
544%config: scripts_basic outputmakefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 $(Q)$(MAKE) $(build)=scripts/kconfig $@
546
547else
548# ===========================================================================
549# Build targets only - this includes vmlinux, arch specific targets, clean
550# targets and others. In general all targets except *config targets.
551
552ifeq ($(KBUILD_EXTMOD),)
553# Additional helpers built in scripts/
554# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200555# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500556PHONY += scripts
Andreas Schwaba54292f2013-04-09 19:57:00 +0200557scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
558 asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 $(Q)$(MAKE) $(build)=$(@)
560
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561# Objects we will link into vmlinux / subdirs we need to visit
562init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100563drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564net-y := net/
565libs-y := lib/
566core-y := usr/
567endif # KBUILD_EXTMOD
568
569ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200570# Read in config
571-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200573ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574# Read in dependencies to all Kconfig* files, make sure to run
575# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700576-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700579$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
Roman Zippelc955cca2006-06-08 22:12:39 -0700581# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100582# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200583# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100584# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100585include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
587else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200588# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200589# but do not care if they are up-to-date. Use auto.conf to trigger the test
590PHONY += include/config/auto.conf
591
592include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200593 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200594 echo >&2; \
595 echo >&2 " ERROR: Kernel configuration is invalid."; \
596 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
597 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
598 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200599 /bin/false)
600
601endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603else
604# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700605include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200606endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
608# The all: target is the default when no target is given on the
609# command line.
610# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200611# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612all: vmlinux
613
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200614include $(srctree)/arch/$(SRCARCH)/Makefile
615
616KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
617
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Arnd Bergmanne74fc972013-02-15 21:23:58 +0100619KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200621KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622endif
623
Andi Kleen1873e872012-03-28 11:51:18 -0700624ifdef CONFIG_READABLE_ASM
625# Disable optimizations that make assembler listings hard to read.
626# reorder blocks reorders the control in the function
627# ipa clone creates specialized cloned functions
628# partial inlining inlines only parts of functions
629KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
630 $(call cc-option,-fno-ipa-cp-clone,) \
631 $(call cc-option,-fno-partial-inlining)
632endif
633
Mike Frysinger08f67462009-06-04 16:29:08 -0700634ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100635KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
636endif
637
Kees Cook19952a92013-12-19 11:35:58 -0800638# Handle stack protector mode.
Kees Cook87796572013-12-19 11:35:59 -0800639ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
Kees Cook19952a92013-12-19 11:35:58 -0800640 stackp-flag := -fstack-protector
641 ifeq ($(call cc-option, $(stackp-flag)),)
Jan Beulich6c15b322014-02-25 15:01:48 -0800642 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
Fathi Boudra27b2a492014-02-25 15:01:46 -0800643 -fstack-protector not supported by compiler)
Kees Cook19952a92013-12-19 11:35:58 -0800644 endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800645else
646ifdef CONFIG_CC_STACKPROTECTOR_STRONG
Kees Cook87796572013-12-19 11:35:59 -0800647 stackp-flag := -fstack-protector-strong
648 ifeq ($(call cc-option, $(stackp-flag)),)
649 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
650 -fstack-protector-strong not supported by compiler)
651 endif
Kees Cook19952a92013-12-19 11:35:58 -0800652else
653 # Force off for distro compilers that enable stack protector by default.
654 stackp-flag := $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900655endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800656endif
Kees Cook19952a92013-12-19 11:35:58 -0800657KBUILD_CFLAGS += $(stackp-flag)
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100658
Behan Webster61163ef2013-09-03 22:27:23 -0400659ifeq ($(COMPILER),clang)
660KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
661KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
662KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
663KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
664KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
665# Quiet clang warning: comparison of unsigned expression < 0 is always false
666KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
667# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
668# source of a reference will be _MergedGlobals and not on of the whitelisted names.
669# See modpost pattern 2
670KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
671else
672
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400673# This warning generated too much noise in a regular build.
674# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200675KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Behan Webster61163ef2013-09-03 22:27:23 -0400676endif
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400677
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200679KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100681# Some targets (ARM with Thumb2, for example), can't be built with frame
682# pointers. For those, we don't have FUNCTION_TRACER automatically
683# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
684# incompatible with -fomit-frame-pointer with current GCC, so we don't use
685# -fomit-frame-pointer with FUNCTION_TRACER.
686ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200687KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100689endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
691ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200692KBUILD_CFLAGS += -g
Behan Webster22883282014-02-14 15:19:17 -0800693KBUILD_AFLAGS += -Wa,-gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694endif
695
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200696ifdef CONFIG_DEBUG_INFO_REDUCED
Andi Kleene82c4bb2013-02-07 13:58:40 -0800697KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
698 $(call cc-option,-fno-var-tracking)
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200699endif
700
Steven Rostedt606576c2008-10-06 19:06:12 -0400701ifdef CONFIG_FUNCTION_TRACER
Steven Rostedta2546fa2011-02-09 13:15:59 -0500702ifdef CONFIG_HAVE_FENTRY
703CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
704endif
705KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
706KBUILD_AFLAGS += $(CC_USING_FENTRY)
Steven Rostedt72441cb2010-10-13 17:12:30 -0400707ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400708 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400709 BUILD_C_RECORDMCOUNT := y
710 export BUILD_C_RECORDMCOUNT
711 endif
712endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200713endif
714
Sam Ravnborg91341d42008-01-21 21:31:44 +0100715# We trigger additional mismatches with less inlining
716ifdef CONFIG_DEBUG_SECTION_MISMATCH
717KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
718endif
719
Sam Ravnborge8e69932005-04-30 16:51:42 -0700720# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700721NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700722CHECKFLAGS += $(NOSTDINC_FLAGS)
723
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200725KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200727# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200728KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400730# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700731KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700732
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700733# conserve stack if available
734KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
735
Sergei Trofimovich80970472013-09-13 14:51:40 -0700736# disallow errors like 'EXPORT_GPL(foo);' with missing header
737KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
738
739# require functions to have arguments in prototypes, not empty 'int foo()'
740KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
741
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800742# Prohibit date/time macros, which would make the build non-deterministic
743KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
744
Michal Marek40df7592011-04-20 13:45:30 +0200745# use the deterministic mode of AR if available
746KBUILD_ARFLAGS := $(call ar-option,D)
747
Jason Baronbf5438fc2010-09-17 11:09:00 -0400748# check for 'asm goto'
749ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
750 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
751endif
752
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900753include $(srctree)/scripts/Makefile.extrawarn
754
Sam Ravnborg06c50402007-10-15 22:17:25 +0200755# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Ozan Çağlayan70cfe022012-08-14 19:00:54 +0300756KBUILD_CPPFLAGS += $(KCPPFLAGS)
757KBUILD_AFLAGS += $(KAFLAGS)
758KBUILD_CFLAGS += $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200759
Roland McGrath18991192007-07-19 01:48:40 -0700760# Use --build-id when available.
761LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200762 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200763KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700764LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
765
David Howells5d7d18f2009-03-04 11:59:07 -0800766ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200767LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800768endif
769
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200771# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772# set in the environment
773# Also any assignments in arch/$(ARCH)/Makefile take precedence over
774# this default value
775export KBUILD_IMAGE ?= vmlinux
776
777#
778# INSTALL_PATH specifies where to place the updated kernel and system map
779# images. Default is /boot, but you can set it to other values
780export INSTALL_PATH ?= /boot
781
782#
Jason Cooperf4d4ffc2013-12-01 23:56:28 +0000783# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
784# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
785# an argument if needed. Otherwise it defaults to the kernel install path
786#
787export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
788
789#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
791# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200792# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793#
794
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100795MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796export MODLIB
797
Theodore Ts'oac031f22006-06-21 20:53:09 -0400798#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900799# INSTALL_MOD_STRIP, if defined, will cause modules to be
800# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
801# the default option --strip-debug will be used. Otherwise,
802# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100803
Theodore Ts'oac031f22006-06-21 20:53:09 -0400804ifdef INSTALL_MOD_STRIP
805ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100806mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400807else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100808mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400809endif # INSTALL_MOD_STRIP=1
810else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100811mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400812endif # INSTALL_MOD_STRIP
813export mod_strip_cmd
814
P J P1bf49dd2013-11-12 15:11:44 -0800815# Select initial ramdisk compression format, default is gzip(1).
816# This shall be used by the dracut(8) tool while creating an initramfs image.
817#
Jan Beulich7ac18152013-12-18 17:08:57 -0800818INITRD_COMPRESS-y := gzip
819INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
820INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
821INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
822INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
823INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
Linus Torvaldsb7000ad2013-12-20 16:52:45 -0800824# do not export INITRD_COMPRESS, since we didn't actually
825# choose a sane default compression above.
826# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827
Michal Marekd9d8d7e2013-01-25 13:41:31 +1030828ifdef CONFIG_MODULE_SIG_ALL
Rusty Russelle2a666d2012-10-19 11:53:15 +1030829MODSECKEY = ./signing_key.priv
830MODPUBKEY = ./signing_key.x509
831export MODPUBKEY
Michal Marek4bc94102013-01-25 13:41:12 +1030832mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
Rusty Russelle2a666d2012-10-19 11:53:15 +1030833else
834mod_sign_cmd = true
835endif
836export mod_sign_cmd
837
838
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100840core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841
842vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
843 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
844 $(net-y) $(net-m) $(libs-y) $(libs-m)))
845
846vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
847 $(init-n) $(init-) \
848 $(core-n) $(core-) $(drivers-n) $(drivers-) \
849 $(net-n) $(net-) $(libs-n) $(libs-))))
850
851init-y := $(patsubst %/, %/built-in.o, $(init-y))
852core-y := $(patsubst %/, %/built-in.o, $(core-y))
853drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
854net-y := $(patsubst %/, %/built-in.o, $(net-y))
855libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
856libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
857libs-y := $(libs-y1) $(libs-y2)
858
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200859# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200860export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
861export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
862export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200863export LDFLAGS_vmlinux
Michal Marek6615d6c2013-04-12 14:12:50 +0200864# used by scripts/pacmage/Makefile
865export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200867vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200869# Final link of vmlinux
870 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
871quiet_cmd_link-vmlinux = LINK $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200873# Include targets which we want to
874# execute if the rest of the kernel build went well.
875vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700876ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100877 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700878endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700879ifdef CONFIG_SAMPLES
880 $(Q)$(MAKE) $(build)=samples
881endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700882ifdef CONFIG_BUILD_DOCSRC
883 $(Q)$(MAKE) $(build)=Documentation
884endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200885 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200886
Masahiro Yamada38385f82014-04-28 16:26:18 +0900887# The actual objects are generated when descending,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200889$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890
891# Handle descending into subdirectories listed in $(vmlinux-dirs)
892# Preset locale variables to speed up the build process. Limit locale
893# tweaks to this spot to avoid wrong language settings when running
894# make menuconfig etc.
895# Error messages still appears in the original language
896
Paul Smith4f193362006-03-05 17:14:10 -0500897PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200898$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 $(Q)$(MAKE) $(build)=$@
900
Michal Marek0d0e7712013-07-11 15:34:51 +0200901define filechk_kernel.release
902 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
903endef
904
Geert Uytterhoeven83a35e32013-06-28 11:27:31 +0200905# Store (new) KERNELRELEASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700906include/config/kernel.release: include/config/auto.conf FORCE
Michal Marek0d0e7712013-07-11 15:34:51 +0200907 $(call filechk,kernel.release)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100908
909
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200911# or the modules are listed in "prepare".
912# A multi level approach is used. prepareN is processed before prepareN-1.
913# archprepare is used in arch Makefiles and when processed asm symlink,
914# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200916# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500917PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200918
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200919# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920# and if so do:
921# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700922prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500924 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700925 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +0200926 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
927 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 /bin/false; \
929 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930endif
931
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200932# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200933prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934
David Howellsd183e6f2012-10-02 18:01:56 +0100935prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200936 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200937 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300939archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200940
941prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200942 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200943
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800945prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947# Generate some files
948# ---------------------------------------------------------------------------
949
950# KERNELRELEASE can change from a few different places, meaning version.h
951# needs to be updated, so this check is forced on all builds
952
953uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200954define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200956 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
957 exit 1; \
958 fi; \
959 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960endef
961
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200962define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +0100963 (echo \#define LINUX_VERSION_CODE $(shell \
964 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200965 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
966endef
967
David Howellsd183e6f2012-10-02 18:01:56 +0100968$(version_h): $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 $(call filechk,version.h)
970
Sam Ravnborg273b2812009-10-18 00:52:28 +0200971include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200972 $(call filechk,utsrelease.h)
973
Vegard Nossum179efcb2008-12-16 12:33:43 +0100974PHONY += headerdep
975headerdep:
Peter Foley9663d982011-04-26 17:17:11 -0400976 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
977 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +0100978
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979# ---------------------------------------------------------------------------
980
Paul Smith4f193362006-03-05 17:14:10 -0500981PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982depend dep:
983 @echo '*** Warning: make $@ is unnecessary now.'
984
985# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +0300986# Firmware install
987INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
988export INSTALL_FW_PATH
989
990PHONY += firmware_install
991firmware_install: FORCE
992 @mkdir -p $(objtree)/firmware
993 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
994
995# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100996# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +0100997
Sam Ravnborge6883b12008-06-05 16:43:46 +0200998#Default location for installed headers
999export INSTALL_HDR_PATH = $(objtree)/usr
1000
Sam Ravnborge6883b12008-06-05 16:43:46 +02001001hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001002
1003# If we do an all arch process set dst to asm-$(hdr-arch)
1004hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001005
H. Peter Anvin052ad272011-11-17 13:17:35 -08001006PHONY += archheaders
1007archheaders:
1008
H. Peter Anvin6520fe52012-05-08 21:22:24 +03001009PHONY += archscripts
1010archscripts:
1011
Sam Ravnborge6883b12008-06-05 16:43:46 +02001012PHONY += __headers
David Howellsd183e6f2012-10-02 18:01:56 +01001013__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -07001014 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001015
1016PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001017headers_install_all:
1018 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001019
David Woodhouse8d730cf2006-06-18 11:58:39 +01001020PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001021headers_install: __headers
David Howells10b63952012-10-02 18:01:57 +01001022 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1023 $(error Headers not exportable for the $(SRCARCH) architecture))
1024 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1025 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001026
Mike Frysinger1f857122007-02-14 00:33:02 -08001027PHONY += headers_check_all
1028headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001029 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001030
David Woodhouse68475352006-06-18 12:02:10 +01001031PHONY += headers_check
1032headers_check: headers_install
David Howells10b63952012-10-02 18:01:57 +01001033 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1034 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001035
David Woodhouse8d730cf2006-06-18 11:58:39 +01001036# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037# Modules
1038
1039ifdef CONFIG_MODULES
1040
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001041# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042
Michal Marek73d13932010-03-10 12:28:58 +01001043all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001045# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001046#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001047# A module can be listed more than once in obj-m resulting in
1048# duplicate lines in modules.order files. Those are removed
1049# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050
Paul Smith4f193362006-03-05 17:14:10 -05001051PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001052modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001053 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001054 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001055 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001056 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057
Michal Mareka6c36632010-03-08 10:07:12 +01001058modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1059 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1060
Michal Marek73d13932010-03-10 12:28:58 +01001061%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001062 $(Q)$(MAKE) $(modbuiltin)=$*
1063
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064
1065# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001066PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001067modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
1069# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001070PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071modules_install: _modinst_ _modinst_post
1072
Paul Smith4f193362006-03-05 17:14:10 -05001073PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001074_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 @rm -rf $(MODLIB)/kernel
1076 @rm -f $(MODLIB)/source
1077 @mkdir -p $(MODLIB)/kernel
Michal Marek890676c2014-04-25 17:36:14 +02001078 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1080 rm -f $(MODLIB)/build ; \
Michal Marek7e1c0472014-04-25 17:29:45 +02001081 ln -s $(CURDIR) $(MODLIB)/build ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001083 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001084 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001085 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001087# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088# boot a modules.dep even before / is mounted read-write. However the
1089# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001090PHONY += _modinst_post
Linus Torvalds6d128e12013-07-10 19:02:51 -07001091_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001092 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001093 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094
Josh Boyerd890f512012-11-05 09:09:24 +10301095ifeq ($(CONFIG_MODULE_SIG), y)
1096PHONY += modules_sign
1097modules_sign:
1098 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1099endif
1100
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101else # CONFIG_MODULES
1102
1103# Modules not configured
1104# ---------------------------------------------------------------------------
1105
1106modules modules_install: FORCE
Michal Marek5369f552012-07-07 23:04:40 +02001107 @echo >&2
1108 @echo >&2 "The present kernel configuration has modules disabled."
1109 @echo >&2 "Type 'make config' and enable loadable module support."
1110 @echo >&2 "Then build a kernel with module support enabled."
1111 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 @exit 1
1113
1114endif # CONFIG_MODULES
1115
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116###
1117# Cleaning is done on three levels.
1118# make clean Delete most generated files
1119# Leave enough to build external modules
1120# make mrproper Delete the current configuration, and all generated files
1121# make distclean Remove editor backup files, patch leftover files and the like
1122
1123# Directories & files removed with 'make clean'
1124CLEAN_DIRS += $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125
1126# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001127MRPROPER_DIRS += include/config usr/include include/generated \
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001128 arch/*/include/generated .tmp_objdiff
David Howellsd183e6f2012-10-02 18:01:56 +01001129MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
Rusty Russelld5b71932012-10-02 14:35:24 +09301130 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1131 signing_key.priv signing_key.x509 x509.genkey \
1132 extra_certificates signing_key.x509.keyid \
Paul Gortmaker9c8cdb72014-02-13 16:28:58 -05001133 signing_key.x509.signer include/linux/version.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134
1135# clean - Delete most, but leave enough to build external modules
1136#
1137clean: rm-dirs := $(CLEAN_DIRS)
1138clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -07001139clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140
Pawel Mollbd1ee802012-10-29 11:23:02 +00001141PHONY += $(clean-dirs) clean archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142$(clean-dirs):
1143 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1144
Pawel Mollbd1ee802012-10-29 11:23:02 +00001145vmlinuxclean:
1146 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1147
1148clean: archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149
1150# mrproper - Delete all generated files, including .config
1151#
1152mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1153mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1154mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1155
Paul Smith4f193362006-03-05 17:14:10 -05001156PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157$(mrproper-dirs):
1158 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1159
1160mrproper: clean archmrproper $(mrproper-dirs)
1161 $(call cmd,rmdirs)
1162 $(call cmd,rmfiles)
1163
1164# distclean
1165#
Paul Smith4f193362006-03-05 17:14:10 -05001166PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167
1168distclean: mrproper
1169 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001170 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Masahiro Yamadaa03fcb502014-03-28 16:36:12 +09001172 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 -type f -print | xargs rm -f
1174
1175
1176# Packaging of the kernel to various formats
1177# ---------------------------------------------------------------------------
1178# rpm target kept for backward compatibility
1179package-dir := $(srctree)/scripts/package
1180
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001181%src-pkg: FORCE
1182 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001183%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001184 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001185rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001186 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187
1188
1189# Brief documentation of the typical targets used
1190# ---------------------------------------------------------------------------
1191
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001192boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001194board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1195board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196
1197help:
1198 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001199 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001200 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001201 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001202 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 @echo ''
1204 @echo 'Configuration targets:'
1205 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1206 @echo ''
1207 @echo 'Other generic targets:'
1208 @echo ' all - Build all targets marked with [*]'
1209 @echo '* vmlinux - Build the bare kernel'
1210 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001211 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001212 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1213 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001215 @echo ' dir/file.[oisS] - Build specified target only'
1216 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1217 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001218 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001219 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 @echo ' tags/TAGS - Generate tags file for editors'
1221 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001222 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001223 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001224 @echo ' kernelversion - Output the version stored in Makefile'
Mike Marciniszync398ff02013-06-24 08:48:37 -04001225 @echo ' image_name - Output the image name'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001226 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001227 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001228 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 @echo ' checkstack - Generate a list of stack hogs'
1231 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001232 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001233 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001234 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001235 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001236 @echo ' headerdep - Detect inclusion cycles in headers'
1237 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1238 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001240 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 @echo ''
1242 @echo 'Documentation targets:'
1243 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1244 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001245 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001247 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248 @echo ''
1249 @$(if $(boards), \
1250 $(foreach b, $(boards), \
1251 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1252 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001253 @$(if $(board-dirs), \
1254 $(foreach b, $(board-dirs), \
1255 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1256 printf " %-16s - Show all of the above\\n" help-boards; \
1257 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
1259 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001260 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001262 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1263 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001264 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001265 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1266 @echo ' 1: warnings which may be relevant and do not occur too often'
1267 @echo ' 2: warnings which occur quite often but may still be relevant'
1268 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001269 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 @echo ''
1271 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1272 @echo 'For further info see the ./README file'
1273
1274
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001275help-board-dirs := $(addprefix help-,$(board-dirs))
1276
1277help-boards: $(help-board-dirs)
1278
1279boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1280
1281$(help-board-dirs): help-%:
1282 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1283 @$(if $(boards-per-dir), \
1284 $(foreach b, $(boards-per-dir), \
1285 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1286 echo '')
1287
1288
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289# Documentation targets
1290# ---------------------------------------------------------------------------
1291%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001292 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1294
1295else # KBUILD_EXTMOD
1296
1297###
1298# External module support.
1299# When building external modules the kernel used as basis is considered
1300# read-only, and no consistency checks are made and the make
1301# system is not used on the basis kernel. If updates are required
1302# in the basis kernel ordinary make commands (without M=...) must
1303# be used.
1304#
1305# The following are the only valid targets when building external
1306# modules.
1307# make M=dir clean Delete all automatically generated files
1308# make M=dir modules Make all modules in specified dir
1309# make M=dir Same as 'make M=dir modules'
1310# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001311# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312# Assumes install directory is already created
1313
1314# We are always building modules
1315KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001316PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001318 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319
Paul Smith4f193362006-03-05 17:14:10 -05001320PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321$(objtree)/Module.symvers:
1322 @test -e $(objtree)/Module.symvers || ( \
1323 echo; \
1324 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1325 echo " is missing; modules will have no dependencies and modversions."; \
1326 echo )
1327
1328module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001329PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330$(module-dirs): crmodverdir $(objtree)/Module.symvers
1331 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1332
1333modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001334 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001335 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336
Paul Smith4f193362006-03-05 17:14:10 -05001337PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001338modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001339
Paul Smith4f193362006-03-05 17:14:10 -05001340install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1341PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001342_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001343 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001344 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
Paul Smith4f193362006-03-05 17:14:10 -05001346PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001347_emodinst_post: _emodinst_
1348 $(call cmd,depmod)
1349
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1351
Paul Smith4f193362006-03-05 17:14:10 -05001352PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353$(clean-dirs):
1354 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1355
1356clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001357clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358
1359help:
1360 @echo ' Building external modules.'
1361 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1362 @echo ''
1363 @echo ' modules - default target, build the module(s)'
1364 @echo ' modules_install - install the module'
1365 @echo ' clean - remove generated files in module directory only'
1366 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001367
1368# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001369PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001370prepare: ;
1371scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372endif # KBUILD_EXTMOD
1373
Michal Marek88d7be02010-09-06 12:00:08 +02001374clean: $(clean-dirs)
1375 $(call cmd,rmdirs)
1376 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001377 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001378 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
David Howellsaddbcdb2012-09-26 10:09:50 +01001379 -o -name '*.ko.*' \
Michal Marek88d7be02010-09-06 12:00:08 +02001380 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1381 -o -name '*.symtypes' -o -name 'modules.order' \
1382 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1383 -o -name '*.gcno' \) -type f -print | xargs rm -f
1384
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385# Generate tags for editors
1386# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001387quiet_cmd_tags = GEN $@
1388 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001390tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 $(call cmd,tags)
1392
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393# Scripts to check various things for consistency
1394# ---------------------------------------------------------------------------
1395
Peter Foley279f3dd2011-04-26 17:15:01 -04001396PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1397
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001399 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001401 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402
1403versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001404 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001406 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407
Nicolas Palix74425ee2010-06-06 17:15:01 +02001408coccicheck:
1409 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1410
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411namespacecheck:
1412 $(PERL) $(srctree)/scripts/namespace.pl
1413
Adrian Bunk295ac052007-08-24 23:04:56 +02001414export_report:
1415 $(PERL) $(srctree)/scripts/export_report.pl
1416
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417endif #ifeq ($(config-targets),1)
1418endif #ifeq ($(mixed-targets),1)
1419
Mike Marciniszync398ff02013-06-24 08:48:37 -04001420PHONY += checkstack kernelrelease kernelversion image_name
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001421
Jeff Dike011e3a92006-12-13 00:34:12 -08001422# UML needs a little special treatment here. It wants to use the host
1423# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1424# else wants $(ARCH), including people doing cross-builds, which means
1425# that $(SUBARCH) doesn't work here.
1426ifeq ($(ARCH), um)
1427CHECKSTACK_ARCH := $(SUBARCH)
1428else
1429CHECKSTACK_ARCH := $(ARCH)
1430endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431checkstack:
1432 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001433 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001435kernelrelease:
1436 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001437
Sam Ravnborgcb584552006-01-09 21:20:34 +01001438kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001439 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440
Mike Marciniszync398ff02013-06-24 08:48:37 -04001441image_name:
1442 @echo $(KBUILD_IMAGE)
1443
Borislav Petkovea01fa92012-04-11 18:36:18 +02001444# Clear a bunch of variables before executing the submake
1445tools/: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001446 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001447 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
Borislav Petkovea01fa92012-04-11 18:36:18 +02001448
1449tools/%: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001450 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001451 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
Borislav Petkovea01fa92012-04-11 18:36:18 +02001452
Sam Ravnborg06300b22006-01-25 07:13:18 +01001453# Single targets
1454# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001455# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001456# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001457# - build with separate output dir 'make O=...'
1458# - external modules
1459#
1460# target-dir => where to store outputfile
1461# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001462
Sam Ravnborg06300b22006-01-25 07:13:18 +01001463ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001464 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001465 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001466else
1467 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001468 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1469 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001470endif
1471
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001472%.s: %.c prepare scripts FORCE
1473 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1474%.i: %.c prepare scripts FORCE
1475 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1476%.o: %.c prepare scripts FORCE
1477 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1478%.lst: %.c prepare scripts FORCE
1479 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1480%.s: %.S prepare scripts FORCE
1481 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1482%.o: %.S prepare scripts FORCE
1483 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001484%.symtypes: %.c prepare scripts FORCE
1485 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001486
1487# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001488/: prepare scripts FORCE
1489 $(cmd_crmodverdir)
1490 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1491 $(build)=$(build-dir)
1492%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001493 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001494 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001495 $(build)=$(build-dir)
1496%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001497 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001498 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001499 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001500 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001501
Masahiro Yamada38385f82014-04-28 16:26:18 +09001502# FIXME Should go into a make.lib or something
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503# ===========================================================================
1504
1505quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1506 cmd_rmdirs = rm -rf $(rm-dirs)
1507
1508quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1509 cmd_rmfiles = rm -f $(rm-files)
1510
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001511# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001512quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001513 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
Rusty Russellb92021b2013-03-15 15:04:17 +10301514 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001515
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001516# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001517# clean it up only when building all modules
1518cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1519 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521# read all saved command lines
1522
1523targets := $(wildcard $(sort $(targets)))
1524cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1525
1526ifneq ($(cmd_files),)
1527 $(cmd_files): ; # Do not try to update included dependency files
1528 include $(cmd_files)
1529endif
1530
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1532# Usage:
1533# $(Q)$(MAKE) $(clean)=dir
1534clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1535
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536endif # skip-makefile
1537
Paul Smith4f193362006-03-05 17:14:10 -05001538PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001540
Paul Smith4f193362006-03-05 17:14:10 -05001541# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001542# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001543.PHONY: $(PHONY)