blob: a192280a883d139594c7ec4aa1bd9914e206a0d0 [file] [log] [blame]
Linus Torvalds55922c92011-05-29 17:43:36 -07001VERSION = 3
Linus Torvalds7d1311b2014-08-16 10:40:26 -06002PATCHLEVEL = 17
Linus Torvalds55922c92011-05-29 17:43:36 -07003SUBLEVEL = 0
Linus Torvalds0f33be02014-09-21 15:43:02 -07004EXTRAVERSION = -rc6
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
Masahiro Yamada011bf122014-07-18 13:40:11 +0900375PYTHON = python
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376CHECK = sparse
377
Hannes Eder80a7d1d92008-12-27 22:38:44 +0100378CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
379 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200380CFLAGS_MODULE =
381AFLAGS_MODULE =
382LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383CFLAGS_KERNEL =
384AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700385CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
387
David Howellsabbf1592012-10-02 18:01:26 +0100388# Use USERINCLUDE when you must reference the UAPI directories only.
389USERINCLUDE := \
390 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
391 -Iarch/$(hdr-arch)/include/generated/uapi \
392 -I$(srctree)/include/uapi \
393 -Iinclude/generated/uapi \
394 -include $(srctree)/include/linux/kconfig.h
395
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396# Use LINUXINCLUDE when you must reference the include/ directory.
397# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100398LINUXINCLUDE := \
399 -I$(srctree)/arch/$(hdr-arch)/include \
400 -Iarch/$(hdr-arch)/include/generated \
401 $(if $(KBUILD_SRC), -I$(srctree)/include) \
402 -Iinclude \
403 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100405KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200407KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700408 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300409 -Werror-implicit-function-declaration \
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200410 -Wno-format-security
411
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200412KBUILD_AFLAGS_KERNEL :=
413KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200414KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200415KBUILD_AFLAGS_MODULE := -DMODULE
416KBUILD_CFLAGS_MODULE := -DMODULE
417KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700419# Read KERNELRELEASE from include/config/kernel.release (if it exists)
420KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Michal Marekcacd54e2011-05-30 13:36:07 +0200421KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100422
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200423export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100424export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200425export CPP AR NM STRIP OBJCOPY OBJDUMP
Masahiro Yamada011bf122014-07-18 13:40:11 +0900426export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200427export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Sam Ravnborg06c50402007-10-15 22:17:25 +0200429export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700430export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200431export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200432export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200433export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200434export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435
436# When compiling out-of-tree modules, put MODVERDIR in the module
437# tree rather than in the kernel tree. The kernel tree might
438# even be read-only.
439export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
440
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441# Files to ignore in find ... statements
442
Prarit Bhargavaae63b2d2014-02-06 07:51:42 -0500443export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
444 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
445 -prune -o
Jesper Juhl450c6072012-02-16 22:49:15 +0100446export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
447 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
449# ===========================================================================
450# Rules shared between *config targets and build targets
451
452# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500453PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454scripts_basic:
455 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500456 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200458# To avoid any implicit rule to kick in, define an empty command.
459scripts/basic/%: scripts_basic ;
460
Paul Smith4f193362006-03-05 17:14:10 -0500461PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200462# outputmakefile generates a Makefile in the output directory, if using a
463# separate output directory. This allows convenient use of make in the
464# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200466ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100467 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200468 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
469 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
470endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200472# Support for using generic headers in asm-generic
473PHONY += asm-generic
474asm-generic:
475 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
Catalin Marinas3c5994c2012-10-17 12:25:44 +0100476 src=asm obj=arch/$(SRCARCH)/include/generated/asm
477 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
478 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200479
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480# To make sure we do not include .config for any of the *config targets
481# catch them early, and hand them over to scripts/kconfig/Makefile
482# It is allowed to specify more targets when calling make, including
483# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200484# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485# Detect when mixed targets is specified, and make a second invocation
486# of make so .config is not included in this case either (for *config).
487
David Howells10b63952012-10-02 18:01:57 +0100488version_h := include/generated/uapi/linux/version.h
David Howellsd183e6f2012-10-02 18:01:56 +0100489
Roman Zippel3eb3c742007-01-10 14:45:28 +0100490no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800491 cscope gtags TAGS tags help %docs check% coccicheck \
David Howellsd183e6f2012-10-02 18:01:56 +0100492 $(version_h) headers_% archheaders archscripts \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700493 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
495config-targets := 0
496mixed-targets := 0
497dot-config := 1
498
499ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
500 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
501 dot-config := 0
502 endif
503endif
504
505ifeq ($(KBUILD_EXTMOD),)
506 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
507 config-targets := 1
508 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
509 mixed-targets := 1
510 endif
511 endif
512endif
513
514ifeq ($(mixed-targets),1)
515# ===========================================================================
516# We're called with mixed targets (*config and build targets).
517# Handle them one by one.
518
Masahiro Yamada9319f452014-04-09 15:51:35 +0900519PHONY += $(MAKECMDGOALS) __build_one_by_one
520
521$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
522 @:
523
524__build_one_by_one:
525 $(Q)set -e; \
526 for i in $(MAKECMDGOALS); do \
527 $(MAKE) -f $(srctree)/Makefile $$i; \
528 done
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530else
531ifeq ($(config-targets),1)
532# ===========================================================================
533# *config targets only - make sure prerequisites are updated, and descend
534# in scripts/kconfig to make the *config target
535
536# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
537# KBUILD_DEFCONFIG may point out an alternative default configuration
538# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200539include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400540export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100542config: scripts_basic outputmakefile FORCE
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100543 $(Q)$(MAKE) $(build)=scripts/kconfig $@
544
545%config: scripts_basic outputmakefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 $(Q)$(MAKE) $(build)=scripts/kconfig $@
547
548else
549# ===========================================================================
550# Build targets only - this includes vmlinux, arch specific targets, clean
551# targets and others. In general all targets except *config targets.
552
553ifeq ($(KBUILD_EXTMOD),)
554# Additional helpers built in scripts/
555# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200556# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500557PHONY += scripts
Andreas Schwaba54292f2013-04-09 19:57:00 +0200558scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
559 asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 $(Q)$(MAKE) $(build)=$(@)
561
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562# Objects we will link into vmlinux / subdirs we need to visit
563init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100564drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565net-y := net/
566libs-y := lib/
567core-y := usr/
568endif # KBUILD_EXTMOD
569
570ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200571# Read in config
572-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200574ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575# Read in dependencies to all Kconfig* files, make sure to run
576# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700577-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700580$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
Roman Zippelc955cca2006-06-08 22:12:39 -0700582# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100583# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200584# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100585# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100586include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
588else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200589# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200590# but do not care if they are up-to-date. Use auto.conf to trigger the test
591PHONY += include/config/auto.conf
592
593include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200594 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200595 echo >&2; \
596 echo >&2 " ERROR: Kernel configuration is invalid."; \
597 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
598 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
599 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200600 /bin/false)
601
602endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700603
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604else
605# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700606include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200607endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
609# The all: target is the default when no target is given on the
610# command line.
611# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200612# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613all: vmlinux
614
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200615include $(srctree)/arch/$(SRCARCH)/Makefile
616
617KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
618
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Arnd Bergmanne74fc972013-02-15 21:23:58 +0100620KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200622KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623endif
624
Jiri Kosina69102312014-08-06 16:08:43 -0700625# Tell gcc to never replace conditional load with a non-conditional one
626KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
627
Andi Kleen1873e872012-03-28 11:51:18 -0700628ifdef CONFIG_READABLE_ASM
629# Disable optimizations that make assembler listings hard to read.
630# reorder blocks reorders the control in the function
631# ipa clone creates specialized cloned functions
632# partial inlining inlines only parts of functions
633KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
634 $(call cc-option,-fno-ipa-cp-clone,) \
635 $(call cc-option,-fno-partial-inlining)
636endif
637
Mike Frysinger08f67462009-06-04 16:29:08 -0700638ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100639KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
640endif
641
Kees Cook19952a92013-12-19 11:35:58 -0800642# Handle stack protector mode.
Kees Cook13324292014-08-06 16:03:31 -0700643#
644# Since kbuild can potentially perform two passes (first with the old
645# .config values and then with updated .config values), we cannot error out
646# if a desired compiler option is unsupported. If we were to error, kbuild
647# could never get to the second pass and actually notice that we changed
648# the option to something that was supported.
649#
650# Additionally, we don't want to fallback and/or silently change which compiler
651# flags will be used, since that leads to producing kernels with different
652# security feature characteristics depending on the compiler used. ("But I
653# selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
654#
655# The middle ground is to warn here so that the failed option is obvious, but
656# to let the build fail with bad compiler flags so that we can't produce a
657# kernel when there is a CONFIG and compiler mismatch.
658#
Kees Cook87796572013-12-19 11:35:59 -0800659ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
Kees Cook19952a92013-12-19 11:35:58 -0800660 stackp-flag := -fstack-protector
661 ifeq ($(call cc-option, $(stackp-flag)),)
Jan Beulich6c15b322014-02-25 15:01:48 -0800662 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
Fathi Boudra27b2a492014-02-25 15:01:46 -0800663 -fstack-protector not supported by compiler)
Kees Cook19952a92013-12-19 11:35:58 -0800664 endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800665else
666ifdef CONFIG_CC_STACKPROTECTOR_STRONG
Kees Cook87796572013-12-19 11:35:59 -0800667 stackp-flag := -fstack-protector-strong
668 ifeq ($(call cc-option, $(stackp-flag)),)
669 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
670 -fstack-protector-strong not supported by compiler)
671 endif
Kees Cook19952a92013-12-19 11:35:58 -0800672else
673 # Force off for distro compilers that enable stack protector by default.
674 stackp-flag := $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900675endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800676endif
Kees Cook19952a92013-12-19 11:35:58 -0800677KBUILD_CFLAGS += $(stackp-flag)
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100678
Behan Webster61163ef2013-09-03 22:27:23 -0400679ifeq ($(COMPILER),clang)
680KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
681KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
682KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
683KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
684KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
685# Quiet clang warning: comparison of unsigned expression < 0 is always false
686KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
687# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
688# source of a reference will be _MergedGlobals and not on of the whitelisted names.
689# See modpost pattern 2
690KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
Behan Webster26ea6bb2014-07-31 21:08:25 -0700691KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
Behan Webster61163ef2013-09-03 22:27:23 -0400692else
693
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400694# This warning generated too much noise in a regular build.
695# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200696KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Behan Webster61163ef2013-09-03 22:27:23 -0400697endif
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400698
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200700KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100702# Some targets (ARM with Thumb2, for example), can't be built with frame
703# pointers. For those, we don't have FUNCTION_TRACER automatically
704# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
705# incompatible with -fomit-frame-pointer with current GCC, so we don't use
706# -fomit-frame-pointer with FUNCTION_TRACER.
707ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200708KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100710endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711
Linus Torvalds2062afb2014-07-26 14:52:01 -0700712KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714ifdef CONFIG_DEBUG_INFO
Andi Kleen866ced92014-07-30 20:50:18 +0200715ifdef CONFIG_DEBUG_INFO_SPLIT
716KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
717else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200718KBUILD_CFLAGS += -g
Andi Kleen866ced92014-07-30 20:50:18 +0200719endif
Behan Webster22883282014-02-14 15:19:17 -0800720KBUILD_AFLAGS += -Wa,-gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721endif
Andi Kleenbfaf2dd2014-07-30 20:50:19 +0200722ifdef CONFIG_DEBUG_INFO_DWARF4
723KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
724endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200726ifdef CONFIG_DEBUG_INFO_REDUCED
Andi Kleene82c4bb2013-02-07 13:58:40 -0800727KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
728 $(call cc-option,-fno-var-tracking)
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200729endif
730
Steven Rostedt606576c2008-10-06 19:06:12 -0400731ifdef CONFIG_FUNCTION_TRACER
Steven Rostedta2546fa2011-02-09 13:15:59 -0500732ifdef CONFIG_HAVE_FENTRY
733CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
734endif
735KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
736KBUILD_AFLAGS += $(CC_USING_FENTRY)
Steven Rostedt72441cb2010-10-13 17:12:30 -0400737ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400738 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400739 BUILD_C_RECORDMCOUNT := y
740 export BUILD_C_RECORDMCOUNT
741 endif
742endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200743endif
744
Sam Ravnborg91341d42008-01-21 21:31:44 +0100745# We trigger additional mismatches with less inlining
746ifdef CONFIG_DEBUG_SECTION_MISMATCH
747KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
748endif
749
Sam Ravnborge8e69932005-04-30 16:51:42 -0700750# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700751NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700752CHECKFLAGS += $(NOSTDINC_FLAGS)
753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200755KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200757# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200758KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400760# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700761KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700762
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700763# conserve stack if available
764KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
765
Sergei Trofimovich80970472013-09-13 14:51:40 -0700766# disallow errors like 'EXPORT_GPL(foo);' with missing header
767KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
768
769# require functions to have arguments in prototypes, not empty 'int foo()'
770KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
771
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800772# Prohibit date/time macros, which would make the build non-deterministic
773KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
774
Michal Marek40df7592011-04-20 13:45:30 +0200775# use the deterministic mode of AR if available
776KBUILD_ARFLAGS := $(call ar-option,D)
777
Jason Baronbf5438fc2010-09-17 11:09:00 -0400778# check for 'asm goto'
779ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
780 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
781endif
782
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900783include $(srctree)/scripts/Makefile.extrawarn
784
Sam Ravnborg06c50402007-10-15 22:17:25 +0200785# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Ozan Çağlayan70cfe022012-08-14 19:00:54 +0300786KBUILD_CPPFLAGS += $(KCPPFLAGS)
787KBUILD_AFLAGS += $(KAFLAGS)
788KBUILD_CFLAGS += $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200789
Roland McGrath18991192007-07-19 01:48:40 -0700790# Use --build-id when available.
791LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200792 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200793KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700794LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
795
David Howells5d7d18f2009-03-04 11:59:07 -0800796ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200797LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800798endif
799
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200801# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802# set in the environment
803# Also any assignments in arch/$(ARCH)/Makefile take precedence over
804# this default value
805export KBUILD_IMAGE ?= vmlinux
806
807#
808# INSTALL_PATH specifies where to place the updated kernel and system map
809# images. Default is /boot, but you can set it to other values
810export INSTALL_PATH ?= /boot
811
812#
Jason Cooperf4d4ffc2013-12-01 23:56:28 +0000813# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
814# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
815# an argument if needed. Otherwise it defaults to the kernel install path
816#
817export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
818
819#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
821# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200822# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823#
824
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100825MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826export MODLIB
827
Theodore Ts'oac031f22006-06-21 20:53:09 -0400828#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900829# INSTALL_MOD_STRIP, if defined, will cause modules to be
830# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
831# the default option --strip-debug will be used. Otherwise,
832# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100833
Theodore Ts'oac031f22006-06-21 20:53:09 -0400834ifdef INSTALL_MOD_STRIP
835ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100836mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400837else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100838mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400839endif # INSTALL_MOD_STRIP=1
840else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100841mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400842endif # INSTALL_MOD_STRIP
843export mod_strip_cmd
844
P J P1bf49dd2013-11-12 15:11:44 -0800845# Select initial ramdisk compression format, default is gzip(1).
846# This shall be used by the dracut(8) tool while creating an initramfs image.
847#
Jan Beulich7ac18152013-12-18 17:08:57 -0800848INITRD_COMPRESS-y := gzip
849INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
850INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
851INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
852INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
853INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
Linus Torvaldsb7000ad2013-12-20 16:52:45 -0800854# do not export INITRD_COMPRESS, since we didn't actually
855# choose a sane default compression above.
856# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
Michal Marekd9d8d7e2013-01-25 13:41:31 +1030858ifdef CONFIG_MODULE_SIG_ALL
Rusty Russelle2a666d2012-10-19 11:53:15 +1030859MODSECKEY = ./signing_key.priv
860MODPUBKEY = ./signing_key.x509
861export MODPUBKEY
Michal Marek4bc94102013-01-25 13:41:12 +1030862mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
Rusty Russelle2a666d2012-10-19 11:53:15 +1030863else
864mod_sign_cmd = true
865endif
866export mod_sign_cmd
867
868
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100870core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
872vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
873 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
874 $(net-y) $(net-m) $(libs-y) $(libs-m)))
875
876vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
877 $(init-n) $(init-) \
878 $(core-n) $(core-) $(drivers-n) $(drivers-) \
879 $(net-n) $(net-) $(libs-n) $(libs-))))
880
881init-y := $(patsubst %/, %/built-in.o, $(init-y))
882core-y := $(patsubst %/, %/built-in.o, $(core-y))
883drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
884net-y := $(patsubst %/, %/built-in.o, $(net-y))
885libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
886libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
887libs-y := $(libs-y1) $(libs-y2)
888
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200889# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200890export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
891export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
892export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200893export LDFLAGS_vmlinux
Michal Marek6615d6c2013-04-12 14:12:50 +0200894# used by scripts/pacmage/Makefile
895export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200897vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200899# Final link of vmlinux
900 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
901quiet_cmd_link-vmlinux = LINK $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200903# Include targets which we want to
904# execute if the rest of the kernel build went well.
905vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700906ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100907 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700908endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700909ifdef CONFIG_SAMPLES
910 $(Q)$(MAKE) $(build)=samples
911endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700912ifdef CONFIG_BUILD_DOCSRC
913 $(Q)$(MAKE) $(build)=Documentation
914endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200915 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200916
Masahiro Yamada38385f82014-04-28 16:26:18 +0900917# The actual objects are generated when descending,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200919$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920
921# Handle descending into subdirectories listed in $(vmlinux-dirs)
922# Preset locale variables to speed up the build process. Limit locale
923# tweaks to this spot to avoid wrong language settings when running
924# make menuconfig etc.
925# Error messages still appears in the original language
926
Paul Smith4f193362006-03-05 17:14:10 -0500927PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200928$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 $(Q)$(MAKE) $(build)=$@
930
Michal Marek0d0e7712013-07-11 15:34:51 +0200931define filechk_kernel.release
932 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
933endef
934
Geert Uytterhoeven83a35e32013-06-28 11:27:31 +0200935# Store (new) KERNELRELEASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700936include/config/kernel.release: include/config/auto.conf FORCE
Michal Marek0d0e7712013-07-11 15:34:51 +0200937 $(call filechk,kernel.release)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100938
939
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200941# or the modules are listed in "prepare".
942# A multi level approach is used. prepareN is processed before prepareN-1.
943# archprepare is used in arch Makefiles and when processed asm symlink,
944# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200946# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500947PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200948
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200949# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950# and if so do:
951# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700952prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500954 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700955 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +0200956 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
957 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 /bin/false; \
959 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960endif
961
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200962# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200963prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964
David Howellsd183e6f2012-10-02 18:01:56 +0100965prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200966 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200967 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300969archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200970
971prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200972 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200973
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800975prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977# Generate some files
978# ---------------------------------------------------------------------------
979
980# KERNELRELEASE can change from a few different places, meaning version.h
981# needs to be updated, so this check is forced on all builds
982
983uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200984define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200986 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
987 exit 1; \
988 fi; \
989 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990endef
991
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200992define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +0100993 (echo \#define LINUX_VERSION_CODE $(shell \
994 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200995 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
996endef
997
David Howellsd183e6f2012-10-02 18:01:56 +0100998$(version_h): $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 $(call filechk,version.h)
1000
Sam Ravnborg273b2812009-10-18 00:52:28 +02001001include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001002 $(call filechk,utsrelease.h)
1003
Vegard Nossum179efcb2008-12-16 12:33:43 +01001004PHONY += headerdep
1005headerdep:
Peter Foley9663d982011-04-26 17:17:11 -04001006 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1007 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +01001008
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009# ---------------------------------------------------------------------------
1010
Paul Smith4f193362006-03-05 17:14:10 -05001011PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012depend dep:
1013 @echo '*** Warning: make $@ is unnecessary now.'
1014
1015# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +03001016# Firmware install
1017INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1018export INSTALL_FW_PATH
1019
1020PHONY += firmware_install
1021firmware_install: FORCE
1022 @mkdir -p $(objtree)/firmware
1023 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1024
1025# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001026# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001027
Sam Ravnborge6883b12008-06-05 16:43:46 +02001028#Default location for installed headers
1029export INSTALL_HDR_PATH = $(objtree)/usr
1030
Sam Ravnborge6883b12008-06-05 16:43:46 +02001031hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001032
1033# If we do an all arch process set dst to asm-$(hdr-arch)
1034hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001035
H. Peter Anvin052ad272011-11-17 13:17:35 -08001036PHONY += archheaders
1037archheaders:
1038
H. Peter Anvin6520fe52012-05-08 21:22:24 +03001039PHONY += archscripts
1040archscripts:
1041
Sam Ravnborge6883b12008-06-05 16:43:46 +02001042PHONY += __headers
David Howellsd183e6f2012-10-02 18:01:56 +01001043__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -07001044 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001045
1046PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001047headers_install_all:
1048 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001049
David Woodhouse8d730cf2006-06-18 11:58:39 +01001050PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001051headers_install: __headers
David Howells10b63952012-10-02 18:01:57 +01001052 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1053 $(error Headers not exportable for the $(SRCARCH) architecture))
1054 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1055 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001056
Mike Frysinger1f857122007-02-14 00:33:02 -08001057PHONY += headers_check_all
1058headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001059 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001060
David Woodhouse68475352006-06-18 12:02:10 +01001061PHONY += headers_check
1062headers_check: headers_install
David Howells10b63952012-10-02 18:01:57 +01001063 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1064 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001065
David Woodhouse8d730cf2006-06-18 11:58:39 +01001066# ---------------------------------------------------------------------------
Shuah Khan5a5da782014-08-07 13:07:46 -06001067# Kernel selftest
1068
1069PHONY += kselftest
1070kselftest:
1071 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1072
1073# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074# Modules
1075
1076ifdef CONFIG_MODULES
1077
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001078# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079
Michal Marek73d13932010-03-10 12:28:58 +01001080all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001082# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001083#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001084# A module can be listed more than once in obj-m resulting in
1085# duplicate lines in modules.order files. Those are removed
1086# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087
Paul Smith4f193362006-03-05 17:14:10 -05001088PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001089modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001090 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001091 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001092 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001093 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094
Michal Mareka6c36632010-03-08 10:07:12 +01001095modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1096 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1097
Michal Marek73d13932010-03-10 12:28:58 +01001098%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001099 $(Q)$(MAKE) $(modbuiltin)=$*
1100
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101
1102# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001103PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001104modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105
1106# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001107PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108modules_install: _modinst_ _modinst_post
1109
Paul Smith4f193362006-03-05 17:14:10 -05001110PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001111_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 @rm -rf $(MODLIB)/kernel
1113 @rm -f $(MODLIB)/source
1114 @mkdir -p $(MODLIB)/kernel
Michal Marek890676c2014-04-25 17:36:14 +02001115 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1117 rm -f $(MODLIB)/build ; \
Michal Marek7e1c0472014-04-25 17:29:45 +02001118 ln -s $(CURDIR) $(MODLIB)/build ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001120 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001121 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001122 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001124# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125# boot a modules.dep even before / is mounted read-write. However the
1126# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001127PHONY += _modinst_post
Linus Torvalds6d128e12013-07-10 19:02:51 -07001128_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001129 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001130 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131
Josh Boyerd890f512012-11-05 09:09:24 +10301132ifeq ($(CONFIG_MODULE_SIG), y)
1133PHONY += modules_sign
1134modules_sign:
1135 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1136endif
1137
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138else # CONFIG_MODULES
1139
1140# Modules not configured
1141# ---------------------------------------------------------------------------
1142
1143modules modules_install: FORCE
Michal Marek5369f552012-07-07 23:04:40 +02001144 @echo >&2
1145 @echo >&2 "The present kernel configuration has modules disabled."
1146 @echo >&2 "Type 'make config' and enable loadable module support."
1147 @echo >&2 "Then build a kernel with module support enabled."
1148 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 @exit 1
1150
1151endif # CONFIG_MODULES
1152
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153###
1154# Cleaning is done on three levels.
1155# make clean Delete most generated files
1156# Leave enough to build external modules
1157# make mrproper Delete the current configuration, and all generated files
1158# make distclean Remove editor backup files, patch leftover files and the like
1159
1160# Directories & files removed with 'make clean'
1161CLEAN_DIRS += $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162
1163# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001164MRPROPER_DIRS += include/config usr/include include/generated \
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001165 arch/*/include/generated .tmp_objdiff
David Howellsd183e6f2012-10-02 18:01:56 +01001166MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
Rusty Russelld5b71932012-10-02 14:35:24 +09301167 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1168 signing_key.priv signing_key.x509 x509.genkey \
1169 extra_certificates signing_key.x509.keyid \
Paul Gortmaker9c8cdb72014-02-13 16:28:58 -05001170 signing_key.x509.signer include/linux/version.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
1172# clean - Delete most, but leave enough to build external modules
1173#
1174clean: rm-dirs := $(CLEAN_DIRS)
1175clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -07001176clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177
Pawel Mollbd1ee802012-10-29 11:23:02 +00001178PHONY += $(clean-dirs) clean archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179$(clean-dirs):
1180 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1181
Pawel Mollbd1ee802012-10-29 11:23:02 +00001182vmlinuxclean:
1183 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1184
1185clean: archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
1187# mrproper - Delete all generated files, including .config
1188#
1189mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1190mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1191mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1192
Paul Smith4f193362006-03-05 17:14:10 -05001193PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194$(mrproper-dirs):
1195 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1196
1197mrproper: clean archmrproper $(mrproper-dirs)
1198 $(call cmd,rmdirs)
1199 $(call cmd,rmfiles)
1200
1201# distclean
1202#
Paul Smith4f193362006-03-05 17:14:10 -05001203PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
1205distclean: mrproper
1206 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001207 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Masahiro Yamadaa03fcb502014-03-28 16:36:12 +09001209 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 -type f -print | xargs rm -f
1211
1212
1213# Packaging of the kernel to various formats
1214# ---------------------------------------------------------------------------
1215# rpm target kept for backward compatibility
Michal Marekc79624c2014-07-04 22:53:52 +02001216package-dir := scripts/package
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001218%src-pkg: FORCE
1219 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001220%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001221 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001222rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001223 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
1225
1226# Brief documentation of the typical targets used
1227# ---------------------------------------------------------------------------
1228
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001229boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001231board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1232board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233
1234help:
1235 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001236 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001237 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001238 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001239 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 @echo ''
1241 @echo 'Configuration targets:'
1242 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1243 @echo ''
1244 @echo 'Other generic targets:'
1245 @echo ' all - Build all targets marked with [*]'
1246 @echo '* vmlinux - Build the bare kernel'
1247 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001248 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001249 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1250 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001252 @echo ' dir/file.[oisS] - Build specified target only'
1253 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1254 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001255 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001256 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257 @echo ' tags/TAGS - Generate tags file for editors'
1258 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001259 @echo ' gtags - Generate GNU GLOBAL index'
Michal Marek3f1d9a62014-07-11 15:57:24 +02001260 @echo ' kernelrelease - Output the release version string (use with make -s)'
1261 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1262 @echo ' image_name - Output the image name (use with make -s)'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001263 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001264 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001265 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 @echo ' checkstack - Generate a list of stack hogs'
1268 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001269 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001270 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001271 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001272 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001273 @echo ' headerdep - Detect inclusion cycles in headers'
1274 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1275 @echo ''
Shuah Khan5a5da782014-08-07 13:07:46 -06001276 @echo 'Kernel selftest'
1277 @echo ' kselftest - Build and run kernel selftest (run as root)'
1278 @echo ' Build, install, and boot kernel before'
1279 @echo ' running kselftest on it'
1280 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001282 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 @echo ''
1284 @echo 'Documentation targets:'
1285 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1286 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001287 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001289 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 @echo ''
1291 @$(if $(boards), \
1292 $(foreach b, $(boards), \
1293 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1294 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001295 @$(if $(board-dirs), \
1296 $(foreach b, $(board-dirs), \
1297 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1298 printf " %-16s - Show all of the above\\n" help-boards; \
1299 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300
1301 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001302 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001304 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1305 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001306 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001307 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1308 @echo ' 1: warnings which may be relevant and do not occur too often'
1309 @echo ' 2: warnings which occur quite often but may still be relevant'
1310 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001311 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 @echo ''
1313 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1314 @echo 'For further info see the ./README file'
1315
1316
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001317help-board-dirs := $(addprefix help-,$(board-dirs))
1318
1319help-boards: $(help-board-dirs)
1320
1321boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1322
1323$(help-board-dirs): help-%:
1324 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1325 @$(if $(boards-per-dir), \
1326 $(foreach b, $(boards-per-dir), \
1327 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1328 echo '')
1329
1330
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331# Documentation targets
1332# ---------------------------------------------------------------------------
1333%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001334 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1336
1337else # KBUILD_EXTMOD
1338
1339###
1340# External module support.
1341# When building external modules the kernel used as basis is considered
1342# read-only, and no consistency checks are made and the make
1343# system is not used on the basis kernel. If updates are required
1344# in the basis kernel ordinary make commands (without M=...) must
1345# be used.
1346#
1347# The following are the only valid targets when building external
1348# modules.
1349# make M=dir clean Delete all automatically generated files
1350# make M=dir modules Make all modules in specified dir
1351# make M=dir Same as 'make M=dir modules'
1352# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001353# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354# Assumes install directory is already created
1355
1356# We are always building modules
1357KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001358PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001360 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361
Paul Smith4f193362006-03-05 17:14:10 -05001362PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363$(objtree)/Module.symvers:
1364 @test -e $(objtree)/Module.symvers || ( \
1365 echo; \
1366 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1367 echo " is missing; modules will have no dependencies and modversions."; \
1368 echo )
1369
1370module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001371PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372$(module-dirs): crmodverdir $(objtree)/Module.symvers
1373 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1374
1375modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001376 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001377 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
Paul Smith4f193362006-03-05 17:14:10 -05001379PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001380modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001381
Paul Smith4f193362006-03-05 17:14:10 -05001382install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1383PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001384_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001385 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001386 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387
Paul Smith4f193362006-03-05 17:14:10 -05001388PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001389_emodinst_post: _emodinst_
1390 $(call cmd,depmod)
1391
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1393
Paul Smith4f193362006-03-05 17:14:10 -05001394PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395$(clean-dirs):
1396 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1397
1398clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001399clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400
1401help:
1402 @echo ' Building external modules.'
1403 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1404 @echo ''
1405 @echo ' modules - default target, build the module(s)'
1406 @echo ' modules_install - install the module'
1407 @echo ' clean - remove generated files in module directory only'
1408 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001409
1410# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001411PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001412prepare: ;
1413scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414endif # KBUILD_EXTMOD
1415
Michal Marek88d7be02010-09-06 12:00:08 +02001416clean: $(clean-dirs)
1417 $(call cmd,rmdirs)
1418 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001419 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001420 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
David Howellsaddbcdb2012-09-26 10:09:50 +01001421 -o -name '*.ko.*' \
Andi Kleen866ced92014-07-30 20:50:18 +02001422 -o -name '*.dwo' \
Michal Marek88d7be02010-09-06 12:00:08 +02001423 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1424 -o -name '*.symtypes' -o -name 'modules.order' \
1425 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1426 -o -name '*.gcno' \) -type f -print | xargs rm -f
1427
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428# Generate tags for editors
1429# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001430quiet_cmd_tags = GEN $@
1431 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001433tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 $(call cmd,tags)
1435
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436# Scripts to check various things for consistency
1437# ---------------------------------------------------------------------------
1438
Peter Foley279f3dd2011-04-26 17:15:01 -04001439PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1440
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001442 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001444 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445
1446versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001447 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001449 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
Nicolas Palix74425ee2010-06-06 17:15:01 +02001451coccicheck:
1452 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1453
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454namespacecheck:
1455 $(PERL) $(srctree)/scripts/namespace.pl
1456
Adrian Bunk295ac052007-08-24 23:04:56 +02001457export_report:
1458 $(PERL) $(srctree)/scripts/export_report.pl
1459
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460endif #ifeq ($(config-targets),1)
1461endif #ifeq ($(mixed-targets),1)
1462
Mike Marciniszync398ff02013-06-24 08:48:37 -04001463PHONY += checkstack kernelrelease kernelversion image_name
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001464
Jeff Dike011e3a92006-12-13 00:34:12 -08001465# UML needs a little special treatment here. It wants to use the host
1466# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1467# else wants $(ARCH), including people doing cross-builds, which means
1468# that $(SUBARCH) doesn't work here.
1469ifeq ($(ARCH), um)
1470CHECKSTACK_ARCH := $(SUBARCH)
1471else
1472CHECKSTACK_ARCH := $(ARCH)
1473endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474checkstack:
1475 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001476 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001478kernelrelease:
1479 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001480
Sam Ravnborgcb584552006-01-09 21:20:34 +01001481kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001482 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483
Mike Marciniszync398ff02013-06-24 08:48:37 -04001484image_name:
1485 @echo $(KBUILD_IMAGE)
1486
Borislav Petkovea01fa92012-04-11 18:36:18 +02001487# Clear a bunch of variables before executing the submake
1488tools/: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001489 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001490 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
Borislav Petkovea01fa92012-04-11 18:36:18 +02001491
1492tools/%: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001493 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001494 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
Borislav Petkovea01fa92012-04-11 18:36:18 +02001495
Sam Ravnborg06300b22006-01-25 07:13:18 +01001496# Single targets
1497# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001498# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001499# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001500# - build with separate output dir 'make O=...'
1501# - external modules
1502#
1503# target-dir => where to store outputfile
1504# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001505
Sam Ravnborg06300b22006-01-25 07:13:18 +01001506ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001507 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001508 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001509else
1510 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001511 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1512 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001513endif
1514
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001515%.s: %.c prepare scripts FORCE
1516 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1517%.i: %.c prepare scripts FORCE
1518 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1519%.o: %.c prepare scripts FORCE
1520 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1521%.lst: %.c prepare scripts FORCE
1522 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1523%.s: %.S prepare scripts FORCE
1524 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1525%.o: %.S prepare scripts FORCE
1526 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001527%.symtypes: %.c prepare scripts FORCE
1528 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001529
1530# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001531/: prepare scripts FORCE
1532 $(cmd_crmodverdir)
1533 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1534 $(build)=$(build-dir)
1535%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001536 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001537 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001538 $(build)=$(build-dir)
1539%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001540 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001541 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001542 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001543 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001544
Masahiro Yamada38385f82014-04-28 16:26:18 +09001545# FIXME Should go into a make.lib or something
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546# ===========================================================================
1547
1548quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1549 cmd_rmdirs = rm -rf $(rm-dirs)
1550
1551quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1552 cmd_rmfiles = rm -f $(rm-files)
1553
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001554# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001555quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001556 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
Rusty Russellb92021b2013-03-15 15:04:17 +10301557 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001558
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001559# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001560# clean it up only when building all modules
1561cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1562 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564# read all saved command lines
1565
1566targets := $(wildcard $(sort $(targets)))
1567cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1568
1569ifneq ($(cmd_files),)
1570 $(cmd_files): ; # Do not try to update included dependency files
1571 include $(cmd_files)
1572endif
1573
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1575# Usage:
1576# $(Q)$(MAKE) $(clean)=dir
1577clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1578
Linus Torvalds1da177e2005-04-16 15:20:36 -07001579endif # skip-makefile
1580
Paul Smith4f193362006-03-05 17:14:10 -05001581PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001583
Paul Smith4f193362006-03-05 17:14:10 -05001584# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001585# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001586.PHONY: $(PHONY)