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Linus Torvalds55922c92011-05-29 17:43:36 -07001VERSION = 3
Linus Torvaldsc9eaa442014-04-13 14:18:35 -07002PATCHLEVEL = 15
Linus Torvalds55922c92011-05-29 17:43:36 -07003SUBLEVEL = 0
Linus Torvaldsc9eaa442014-04-13 14:18:35 -07004EXTRAVERSION = -rc1
Linus Torvalds38dbfb52014-02-02 16:42:13 -08005NAME = Shuffling Zombie Juror
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
7# *DOCUMENTATION*
8# To see a list of typical targets execute "make help"
9# More info can be located in ./README
10# Comments in this file are targeted only to the developer, do not
11# expect to learn how to build the kernel reading this file.
12
Oleg Verych15964862006-12-10 02:18:40 -080013# Do not:
14# o use make's built-in rules and variables
Linus Nilssond384e352008-01-20 17:10:01 +010015# (this increases performance and avoids hard-to-debug behaviour);
Oleg Verych15964862006-12-10 02:18:40 -080016# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
H. Peter Anvinc0513462009-12-17 06:56:11 -080019# Avoid funny character set dependencies
H. Peter Anvin06b5dc62009-12-17 15:51:37 -080020unexport LC_ALL
H. Peter Anvinc0513462009-12-17 06:56:11 -080021LC_COLLATE=C
22LC_NUMERIC=C
Michal Marek07105202010-01-08 12:25:37 +010023export LC_COLLATE LC_NUMERIC
H. Peter Anvinc0513462009-12-17 06:56:11 -080024
Borislav Petkovab7474e2013-11-11 15:27:43 +010025# Avoid interference with shell env settings
26unexport GREP_OPTIONS
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028# We are using a recursive build, so we need to do a little thinking
29# to get the ordering right.
30#
31# Most importantly: sub-Makefiles should only ever modify files in
32# their own directory. If in some directory we have a dependency on
33# a file in another dir (which doesn't happen often, but it's often
34# unavoidable when linking the built-in.o targets which finally
35# turn into vmlinux), we will call a sub make in that other dir, and
36# after that we are sure that everything which is in that other dir
37# is now up to date.
38#
39# The only cases where we need to modify files which have global
40# effects are thus separated out and done before the recursive
41# descending is started. They are now explicitly listed as the
42# prepare rule.
43
44# To put more focus on warnings, be less verbose as default
45# Use 'make V=1' to see the full commands
46
Cheng Renquanb8b06182009-05-26 16:03:07 +080047ifeq ("$(origin V)", "command line")
48 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070049endif
50ifndef KBUILD_VERBOSE
51 KBUILD_VERBOSE = 0
52endif
53
Robert P. J. Day1c7bafe2006-09-13 07:57:50 -040054# Call a source code checker (by default, "sparse") as part of the
55# C compilation.
56#
57# Use 'make C=1' to enable checking of only re-compiled files.
58# Use 'make C=2' to enable checking of *all* source files, regardless
59# of whether they are re-compiled or not.
60#
61# See the file "Documentation/sparse.txt" for more details, including
62# where to get the "sparse" utility.
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Cheng Renquanb8b06182009-05-26 16:03:07 +080064ifeq ("$(origin C)", "command line")
65 KBUILD_CHECKSRC = $(C)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066endif
67ifndef KBUILD_CHECKSRC
68 KBUILD_CHECKSRC = 0
69endif
70
71# Use make M=dir to specify directory of external module to build
72# Old syntax make ... SUBDIRS=$PWD is still supported
73# Setting the environment variable KBUILD_EXTMOD take precedence
74ifdef SUBDIRS
75 KBUILD_EXTMOD ?= $(SUBDIRS)
76endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Cheng Renquanb8b06182009-05-26 16:03:07 +080078ifeq ("$(origin M)", "command line")
79 KBUILD_EXTMOD := $(M)
80endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82# kbuild supports saving output files in a separate directory.
83# To locate output files in a separate directory two syntaxes are supported.
84# In both cases the working directory must be the root of the kernel src.
85# 1) O=
86# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +020087#
Linus Torvalds1da177e2005-04-16 15:20:36 -070088# 2) Set KBUILD_OUTPUT
89# Set the environment variable KBUILD_OUTPUT to point to the directory
90# where the output files shall be placed.
91# export KBUILD_OUTPUT=dir/to/store/output/files/
92# make
93#
94# The O= assignment takes precedence over the KBUILD_OUTPUT environment
95# variable.
96
97
98# KBUILD_SRC is set on invocation of make in OBJ directory
99# KBUILD_SRC is not intended to be used by the regular user (for now)
100ifeq ($(KBUILD_SRC),)
101
102# OK, Make called in directory where kernel src resides
103# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800104ifeq ("$(origin O)", "command line")
105 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106endif
107
108# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500109PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110_all:
111
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100112# Cancel implicit rules on top Makefile
113$(CURDIR)/Makefile Makefile: ;
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115ifneq ($(KBUILD_OUTPUT),)
116# Invoke a second make in the output directory, passing relevant variables
117# check that the output directory actually exists
118saved-output := $(KBUILD_OUTPUT)
Masahiro Yamada1c9e70a2014-03-31 16:41:36 +0900119KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
120 && /bin/pwd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121$(if $(KBUILD_OUTPUT),, \
Masahiro Yamada1c9e70a2014-03-31 16:41:36 +0900122 $(error failed to create output directory "$(saved-output)"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Milton Miller0b357862007-09-21 18:09:02 -0500124PHONY += $(MAKECMDGOALS) sub-make
125
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100126$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Charles Keepax16f89092012-10-15 13:49:12 +0100127 @:
Milton Miller0b357862007-09-21 18:09:02 -0500128
129sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200130 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
131 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500132 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
133 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135# Leave processing to above invocation of make
136skip-makefile := 1
137endif # ifneq ($(KBUILD_OUTPUT),)
138endif # ifeq ($(KBUILD_SRC),)
139
140# We process the rest of the Makefile if this is the final invocation of make
141ifeq ($(skip-makefile),)
142
143# If building an external module we do not care about the all: rule
144# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500145PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146ifeq ($(KBUILD_EXTMOD),)
147_all: all
148else
149_all: modules
150endif
151
152srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153objtree := $(CURDIR)
154src := $(srctree)
155obj := $(objtree)
156
Mattia Dongili0f558c32006-02-19 13:50:37 +0100157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Amerigo Wang11294232009-06-19 03:40:26 -0400159export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162# SUBARCH tells the usermode build what the underlying arch is. That is set
163# first, and if a usermode build is happening, the "ARCH=um" on the command
164# line overrides the setting of ARCH below. If a native build is happening,
165# then ARCH is assigned, getting whatever value it gets normally, and
166# SUBARCH is subsequently ignored.
167
David Woodhouseffee0de2012-12-20 21:51:55 +0000168SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
169 -e s/sun4u/sparc64/ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800171 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900172 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Will Deaconf1b99392013-01-18 19:00:47 +0000173 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175# Cross compiling and selecting different set of gcc/bin-utils
176# ---------------------------------------------------------------------------
177#
178# When performing cross compilation for other architectures ARCH shall be set
179# to the target architecture. (See arch/* for the possibilities).
180# ARCH can be set during invocation of make:
181# make ARCH=ia64
182# Another way is to have ARCH set in the environment.
183# The default ARCH is the host where make is executed.
184
185# CROSS_COMPILE specify the prefix used for all executables used
186# during compilation. Only gcc and related bin-utils executables
187# are prefixed with $(CROSS_COMPILE).
188# CROSS_COMPILE can be set on the command line
189# make CROSS_COMPILE=ia64-linux-
190# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800191# A third alternative is to store a setting in .config so that plain
192# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193# Default value for CROSS_COMPILE is not to prefix executables
194# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200195ARCH ?= $(SUBARCH)
Roland McGrath84336462009-12-21 16:24:06 -0800196CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200199UTS_MACHINE := $(ARCH)
200SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
Sam Ravnborgd746d642007-11-12 20:14:19 +0100202# Additional ARCH settings for x86
203ifeq ($(ARCH),i386)
204 SRCARCH := x86
205endif
206ifeq ($(ARCH),x86_64)
207 SRCARCH := x86
208endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200209
Sam Ravnborg5e538792008-12-02 23:17:12 -0800210# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000211ifeq ($(ARCH),sparc32)
212 SRCARCH := sparc
213endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200214ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800215 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200216endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200217
Paul Mundt3cc000b2009-04-11 08:39:27 +0900218# Additional ARCH settings for sh
219ifeq ($(ARCH),sh64)
220 SRCARCH := sh
221endif
222
Chris Metcalf18aecc22011-05-04 14:38:26 -0400223# Additional ARCH settings for tile
Chris Metcalf6738d322011-05-25 15:24:00 -0400224ifeq ($(ARCH),tilepro)
225 SRCARCH := tile
226endif
Chris Metcalf18aecc22011-05-04 14:38:26 -0400227ifeq ($(ARCH),tilegx)
228 SRCARCH := tile
229endif
230
Sam Ravnborg5e538792008-12-02 23:17:12 -0800231# Where to locate arch specific headers
232hdr-arch := $(SRCARCH)
233
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700234KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500235export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237# SHELL used by kbuild
238CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
239 else if [ -x /bin/bash ]; then echo /bin/bash; \
240 else echo sh; fi ; fi)
241
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200242HOSTCC = gcc
243HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800244HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200245HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Behan Webster61163ef2013-09-03 22:27:23 -0400247ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
248HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
249 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
250endif
251
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200252# Decide whether to build built-in, modular, or both.
253# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254
255KBUILD_MODULES :=
256KBUILD_BUILTIN := 1
257
258# If we have only "make modules", don't compile built-in objects.
259# When we're building modules with modversions, we need to consider
260# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200261# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
263ifeq ($(MAKECMDGOALS),modules)
264 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
265endif
266
267# If we have "make <whatever> modules", compile modules
268# in addition to whatever we do anyway.
269# Just "make" or "make all" shall build modules as well
270
271ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
272 KBUILD_MODULES := 1
273endif
274
275ifeq ($(MAKECMDGOALS),)
276 KBUILD_MODULES := 1
277endif
278
Sam Ravnborge579d352005-07-27 08:10:10 +0200279export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
281
282# Beautify output
283# ---------------------------------------------------------------------------
284#
285# Normally, we echo the whole command before executing it. By making
286# that echo $($(quiet)$(cmd)), we now have the possibility to set
287# $(quiet) to choose other forms of output instead, e.g.
288#
289# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
290# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
291#
292# If $(quiet) is empty, the whole command will be printed.
293# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200294# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295# the variable $(silent_cmd_cc_o_c) doesn't exist.
296#
Adrian Bunka58a4142006-01-10 00:08:17 +0100297# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298# for commands that shall be hidden in non-verbose mode.
299#
300# $(Q)ln $@ :<
301#
302# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
303# If KBUILD_VERBOSE equals 1 then the above command is displayed.
304
305ifeq ($(KBUILD_VERBOSE),1)
306 quiet =
307 Q =
308else
309 quiet=quiet_
310 Q = @
311endif
312
313# If the user is running make -s (silent mode), suppress echoing of
314# commands
315
Emil Medvee36aaea2014-01-06 02:58:40 -0600316ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
317ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
318 quiet=silent_
319endif
320else # make-3.8x
Jason Wessele6ac89f2012-01-05 16:46:30 -0600321ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 quiet=silent_
323endif
Emil Medvee36aaea2014-01-06 02:58:40 -0600324endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
326export quiet Q KBUILD_VERBOSE
327
Behan Webster61163ef2013-09-03 22:27:23 -0400328ifneq ($(CC),)
329ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
330COMPILER := clang
331else
332COMPILER := gcc
333endif
334export COMPILER
335endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337# Look for make include files relative to root of kernel src
338MAKEFLAGS += --include-dir=$(srctree)
339
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100340# We need some generic definitions (do not try to remake the file).
341$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800342include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344# Make variables (CC, etc...)
345
346AS = $(CROSS_COMPILE)as
347LD = $(CROSS_COMPILE)ld
348CC = $(CROSS_COMPILE)gcc
349CPP = $(CC) -E
350AR = $(CROSS_COMPILE)ar
351NM = $(CROSS_COMPILE)nm
352STRIP = $(CROSS_COMPILE)strip
353OBJCOPY = $(CROSS_COMPILE)objcopy
354OBJDUMP = $(CROSS_COMPILE)objdump
355AWK = awk
356GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200357INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358DEPMOD = /sbin/depmod
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359PERL = perl
360CHECK = sparse
361
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100362CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
363 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200364CFLAGS_MODULE =
365AFLAGS_MODULE =
366LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367CFLAGS_KERNEL =
368AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700369CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
371
David Howellsabbf1592012-10-02 18:01:26 +0100372# Use USERINCLUDE when you must reference the UAPI directories only.
373USERINCLUDE := \
374 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
375 -Iarch/$(hdr-arch)/include/generated/uapi \
376 -I$(srctree)/include/uapi \
377 -Iinclude/generated/uapi \
378 -include $(srctree)/include/linux/kconfig.h
379
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380# Use LINUXINCLUDE when you must reference the include/ directory.
381# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100382LINUXINCLUDE := \
383 -I$(srctree)/arch/$(hdr-arch)/include \
384 -Iarch/$(hdr-arch)/include/generated \
385 $(if $(KBUILD_SRC), -I$(srctree)/include) \
386 -Iinclude \
387 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100389KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200391KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700392 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300393 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800394 -Wno-format-security \
Behan Webster61163ef2013-09-03 22:27:23 -0400395 $(call cc-option,-fno-delete-null-pointer-checks,)
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200396KBUILD_AFLAGS_KERNEL :=
397KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200398KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200399KBUILD_AFLAGS_MODULE := -DMODULE
400KBUILD_CFLAGS_MODULE := -DMODULE
401KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700403# Read KERNELRELEASE from include/config/kernel.release (if it exists)
404KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Michal Marekcacd54e2011-05-30 13:36:07 +0200405KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100406
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200407export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100408export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200409export CPP AR NM STRIP OBJCOPY OBJDUMP
410export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200411export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
Sam Ravnborg06c50402007-10-15 22:17:25 +0200413export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700414export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200415export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200416export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200417export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200418export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
420# When compiling out-of-tree modules, put MODVERDIR in the module
421# tree rather than in the kernel tree. The kernel tree might
422# even be read-only.
423export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
424
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425# Files to ignore in find ... statements
426
Prarit Bhargavaae63b2d2014-02-06 07:51:42 -0500427export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
428 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
429 -prune -o
Jesper Juhl450c6072012-02-16 22:49:15 +0100430export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
431 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
433# ===========================================================================
434# Rules shared between *config targets and build targets
435
436# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500437PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438scripts_basic:
439 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500440 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200442# To avoid any implicit rule to kick in, define an empty command.
443scripts/basic/%: scripts_basic ;
444
Paul Smith4f193362006-03-05 17:14:10 -0500445PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200446# outputmakefile generates a Makefile in the output directory, if using a
447# separate output directory. This allows convenient use of make in the
448# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200450ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100451 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200452 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
453 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
454endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200456# Support for using generic headers in asm-generic
457PHONY += asm-generic
458asm-generic:
459 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
Catalin Marinas3c5994c2012-10-17 12:25:44 +0100460 src=asm obj=arch/$(SRCARCH)/include/generated/asm
461 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
462 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200463
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464# To make sure we do not include .config for any of the *config targets
465# catch them early, and hand them over to scripts/kconfig/Makefile
466# It is allowed to specify more targets when calling make, including
467# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200468# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469# Detect when mixed targets is specified, and make a second invocation
470# of make so .config is not included in this case either (for *config).
471
David Howells10b63952012-10-02 18:01:57 +0100472version_h := include/generated/uapi/linux/version.h
David Howellsd183e6f2012-10-02 18:01:56 +0100473
Roman Zippel3eb3c742007-01-10 14:45:28 +0100474no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800475 cscope gtags TAGS tags help %docs check% coccicheck \
David Howellsd183e6f2012-10-02 18:01:56 +0100476 $(version_h) headers_% archheaders archscripts \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700477 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
479config-targets := 0
480mixed-targets := 0
481dot-config := 1
482
483ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
484 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
485 dot-config := 0
486 endif
487endif
488
489ifeq ($(KBUILD_EXTMOD),)
490 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
491 config-targets := 1
492 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
493 mixed-targets := 1
494 endif
495 endif
496endif
497
498ifeq ($(mixed-targets),1)
499# ===========================================================================
500# We're called with mixed targets (*config and build targets).
501# Handle them one by one.
502
Masahiro Yamada9319f452014-04-09 15:51:35 +0900503PHONY += $(MAKECMDGOALS) __build_one_by_one
504
505$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
506 @:
507
508__build_one_by_one:
509 $(Q)set -e; \
510 for i in $(MAKECMDGOALS); do \
511 $(MAKE) -f $(srctree)/Makefile $$i; \
512 done
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
514else
515ifeq ($(config-targets),1)
516# ===========================================================================
517# *config targets only - make sure prerequisites are updated, and descend
518# in scripts/kconfig to make the *config target
519
520# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
521# KBUILD_DEFCONFIG may point out an alternative default configuration
522# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200523include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400524export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100526config: scripts_basic outputmakefile FORCE
527 $(Q)mkdir -p include/linux include/config
528 $(Q)$(MAKE) $(build)=scripts/kconfig $@
529
530%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700531 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 $(Q)$(MAKE) $(build)=scripts/kconfig $@
533
534else
535# ===========================================================================
536# Build targets only - this includes vmlinux, arch specific targets, clean
537# targets and others. In general all targets except *config targets.
538
539ifeq ($(KBUILD_EXTMOD),)
540# Additional helpers built in scripts/
541# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200542# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500543PHONY += scripts
Andreas Schwaba54292f2013-04-09 19:57:00 +0200544scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
545 asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 $(Q)$(MAKE) $(build)=$(@)
547
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548# Objects we will link into vmlinux / subdirs we need to visit
549init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100550drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551net-y := net/
552libs-y := lib/
553core-y := usr/
554endif # KBUILD_EXTMOD
555
556ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200557# Read in config
558-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200560ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561# Read in dependencies to all Kconfig* files, make sure to run
562# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700563-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700566$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567
Roman Zippelc955cca2006-06-08 22:12:39 -0700568# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100569# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200570# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100571# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100572include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
574else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200575# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200576# but do not care if they are up-to-date. Use auto.conf to trigger the test
577PHONY += include/config/auto.conf
578
579include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200580 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200581 echo >&2; \
582 echo >&2 " ERROR: Kernel configuration is invalid."; \
583 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
584 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
585 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200586 /bin/false)
587
588endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700589
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590else
591# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700592include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200593endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594
595# The all: target is the default when no target is given on the
596# command line.
597# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200598# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599all: vmlinux
600
601ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Arnd Bergmanne74fc972013-02-15 21:23:58 +0100602KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200604KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605endif
606
Paul Mundta1f42be2012-06-18 13:48:08 +0900607include $(srctree)/arch/$(SRCARCH)/Makefile
608
Andi Kleen1873e872012-03-28 11:51:18 -0700609ifdef CONFIG_READABLE_ASM
610# Disable optimizations that make assembler listings hard to read.
611# reorder blocks reorders the control in the function
612# ipa clone creates specialized cloned functions
613# partial inlining inlines only parts of functions
614KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
615 $(call cc-option,-fno-ipa-cp-clone,) \
616 $(call cc-option,-fno-partial-inlining)
617endif
618
Mike Frysinger08f67462009-06-04 16:29:08 -0700619ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100620KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
621endif
622
Kees Cook19952a92013-12-19 11:35:58 -0800623# Handle stack protector mode.
Kees Cook87796572013-12-19 11:35:59 -0800624ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
Kees Cook19952a92013-12-19 11:35:58 -0800625 stackp-flag := -fstack-protector
626 ifeq ($(call cc-option, $(stackp-flag)),)
Jan Beulich6c15b322014-02-25 15:01:48 -0800627 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
Fathi Boudra27b2a492014-02-25 15:01:46 -0800628 -fstack-protector not supported by compiler)
Kees Cook19952a92013-12-19 11:35:58 -0800629 endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800630else
631ifdef CONFIG_CC_STACKPROTECTOR_STRONG
Kees Cook87796572013-12-19 11:35:59 -0800632 stackp-flag := -fstack-protector-strong
633 ifeq ($(call cc-option, $(stackp-flag)),)
634 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
635 -fstack-protector-strong not supported by compiler)
636 endif
Kees Cook19952a92013-12-19 11:35:58 -0800637else
638 # Force off for distro compilers that enable stack protector by default.
639 stackp-flag := $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900640endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800641endif
Kees Cook19952a92013-12-19 11:35:58 -0800642KBUILD_CFLAGS += $(stackp-flag)
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100643
Behan Webster61163ef2013-09-03 22:27:23 -0400644ifeq ($(COMPILER),clang)
645KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
646KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
647KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
648KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
649KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
650# Quiet clang warning: comparison of unsigned expression < 0 is always false
651KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
652# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
653# source of a reference will be _MergedGlobals and not on of the whitelisted names.
654# See modpost pattern 2
655KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
656else
657
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400658# This warning generated too much noise in a regular build.
659# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200660KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Behan Webster61163ef2013-09-03 22:27:23 -0400661endif
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200664KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100666# Some targets (ARM with Thumb2, for example), can't be built with frame
667# pointers. For those, we don't have FUNCTION_TRACER automatically
668# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
669# incompatible with -fomit-frame-pointer with current GCC, so we don't use
670# -fomit-frame-pointer with FUNCTION_TRACER.
671ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200672KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100674endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675
676ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200677KBUILD_CFLAGS += -g
Geoff Levand7db43632013-12-11 23:34:40 +0000678KBUILD_AFLAGS += -Wa,--gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679endif
680
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200681ifdef CONFIG_DEBUG_INFO_REDUCED
Andi Kleene82c4bb2013-02-07 13:58:40 -0800682KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
683 $(call cc-option,-fno-var-tracking)
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200684endif
685
Steven Rostedt606576c2008-10-06 19:06:12 -0400686ifdef CONFIG_FUNCTION_TRACER
Steven Rostedta2546fa2011-02-09 13:15:59 -0500687ifdef CONFIG_HAVE_FENTRY
688CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
689endif
690KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
691KBUILD_AFLAGS += $(CC_USING_FENTRY)
Steven Rostedt72441cb2010-10-13 17:12:30 -0400692ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400693 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400694 BUILD_C_RECORDMCOUNT := y
695 export BUILD_C_RECORDMCOUNT
696 endif
697endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200698endif
699
Sam Ravnborg91341d42008-01-21 21:31:44 +0100700# We trigger additional mismatches with less inlining
701ifdef CONFIG_DEBUG_SECTION_MISMATCH
702KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
703endif
704
Sam Ravnborge8e69932005-04-30 16:51:42 -0700705# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700706NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700707CHECKFLAGS += $(NOSTDINC_FLAGS)
708
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200710KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200712# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200713KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400715# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700716KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700717
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700718# conserve stack if available
719KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
720
Sergei Trofimovich80970472013-09-13 14:51:40 -0700721# disallow errors like 'EXPORT_GPL(foo);' with missing header
722KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
723
724# require functions to have arguments in prototypes, not empty 'int foo()'
725KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
726
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800727# Prohibit date/time macros, which would make the build non-deterministic
728KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
729
Michal Marek40df7592011-04-20 13:45:30 +0200730# use the deterministic mode of AR if available
731KBUILD_ARFLAGS := $(call ar-option,D)
732
Jason Baronbf5438fc2010-09-17 11:09:00 -0400733# check for 'asm goto'
734ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
735 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
736endif
737
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900738include $(srctree)/scripts/Makefile.extrawarn
739
Sam Ravnborg06c50402007-10-15 22:17:25 +0200740# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Ozan Çağlayan70cfe022012-08-14 19:00:54 +0300741KBUILD_CPPFLAGS += $(KCPPFLAGS)
742KBUILD_AFLAGS += $(KAFLAGS)
743KBUILD_CFLAGS += $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200744
Roland McGrath18991192007-07-19 01:48:40 -0700745# Use --build-id when available.
746LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200747 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200748KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700749LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
750
David Howells5d7d18f2009-03-04 11:59:07 -0800751ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200752LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800753endif
754
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200756# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757# set in the environment
758# Also any assignments in arch/$(ARCH)/Makefile take precedence over
759# this default value
760export KBUILD_IMAGE ?= vmlinux
761
762#
763# INSTALL_PATH specifies where to place the updated kernel and system map
764# images. Default is /boot, but you can set it to other values
765export INSTALL_PATH ?= /boot
766
767#
Jason Cooperf4d4ffc2013-12-01 23:56:28 +0000768# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
769# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
770# an argument if needed. Otherwise it defaults to the kernel install path
771#
772export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
773
774#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
776# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200777# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778#
779
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100780MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781export MODLIB
782
Theodore Ts'oac031f22006-06-21 20:53:09 -0400783#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100784# INSTALL_MOD_STRIP, if defined, will cause modules to be
785# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
786# the default option --strip-debug will be used. Otherwise,
Gilles Espinasse177b2412011-01-09 08:59:49 +0100787# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100788
Theodore Ts'oac031f22006-06-21 20:53:09 -0400789ifdef INSTALL_MOD_STRIP
790ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100791mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400792else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100793mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400794endif # INSTALL_MOD_STRIP=1
795else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100796mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400797endif # INSTALL_MOD_STRIP
798export mod_strip_cmd
799
P J P1bf49dd2013-11-12 15:11:44 -0800800# Select initial ramdisk compression format, default is gzip(1).
801# This shall be used by the dracut(8) tool while creating an initramfs image.
802#
Jan Beulich7ac18152013-12-18 17:08:57 -0800803INITRD_COMPRESS-y := gzip
804INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
805INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
806INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
807INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
808INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
Linus Torvaldsb7000ad2013-12-20 16:52:45 -0800809# do not export INITRD_COMPRESS, since we didn't actually
810# choose a sane default compression above.
811# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Michal Marekd9d8d7e2013-01-25 13:41:31 +1030813ifdef CONFIG_MODULE_SIG_ALL
Rusty Russelle2a666d2012-10-19 11:53:15 +1030814MODSECKEY = ./signing_key.priv
815MODPUBKEY = ./signing_key.x509
816export MODPUBKEY
Michal Marek4bc94102013-01-25 13:41:12 +1030817mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
Rusty Russelle2a666d2012-10-19 11:53:15 +1030818else
819mod_sign_cmd = true
820endif
821export mod_sign_cmd
822
823
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100825core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826
827vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
828 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
829 $(net-y) $(net-m) $(libs-y) $(libs-m)))
830
831vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
832 $(init-n) $(init-) \
833 $(core-n) $(core-) $(drivers-n) $(drivers-) \
834 $(net-n) $(net-) $(libs-n) $(libs-))))
835
836init-y := $(patsubst %/, %/built-in.o, $(init-y))
837core-y := $(patsubst %/, %/built-in.o, $(core-y))
838drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
839net-y := $(patsubst %/, %/built-in.o, $(net-y))
840libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
841libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
842libs-y := $(libs-y1) $(libs-y2)
843
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200844# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200845export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
846export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
847export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200848export LDFLAGS_vmlinux
Michal Marek6615d6c2013-04-12 14:12:50 +0200849# used by scripts/pacmage/Makefile
850export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200852vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200854# Final link of vmlinux
855 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
856quiet_cmd_link-vmlinux = LINK $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200858# Include targets which we want to
859# execute if the rest of the kernel build went well.
860vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700861ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100862 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700863endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700864ifdef CONFIG_SAMPLES
865 $(Q)$(MAKE) $(build)=samples
866endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700867ifdef CONFIG_BUILD_DOCSRC
868 $(Q)$(MAKE) $(build)=Documentation
869endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200870 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200871
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872# The actual objects are generated when descending,
873# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200874$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
876# Handle descending into subdirectories listed in $(vmlinux-dirs)
877# Preset locale variables to speed up the build process. Limit locale
878# tweaks to this spot to avoid wrong language settings when running
879# make menuconfig etc.
880# Error messages still appears in the original language
881
Paul Smith4f193362006-03-05 17:14:10 -0500882PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200883$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 $(Q)$(MAKE) $(build)=$@
885
Michal Marek0d0e7712013-07-11 15:34:51 +0200886define filechk_kernel.release
887 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
888endef
889
Geert Uytterhoeven83a35e32013-06-28 11:27:31 +0200890# Store (new) KERNELRELEASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700891include/config/kernel.release: include/config/auto.conf FORCE
Michal Marek0d0e7712013-07-11 15:34:51 +0200892 $(call filechk,kernel.release)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100893
894
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200896# or the modules are listed in "prepare".
897# A multi level approach is used. prepareN is processed before prepareN-1.
898# archprepare is used in arch Makefiles and when processed asm symlink,
899# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200901# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500902PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200903
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200904# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905# and if so do:
906# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700907prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500909 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700910 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +0200911 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
912 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 /bin/false; \
914 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915endif
916
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200917# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200918prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919
David Howellsd183e6f2012-10-02 18:01:56 +0100920prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200921 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200922 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300924archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200925
926prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200927 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200928
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800930prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932# Generate some files
933# ---------------------------------------------------------------------------
934
935# KERNELRELEASE can change from a few different places, meaning version.h
936# needs to be updated, so this check is forced on all builds
937
938uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200939define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200941 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
942 exit 1; \
943 fi; \
944 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945endef
946
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200947define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +0100948 (echo \#define LINUX_VERSION_CODE $(shell \
949 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200950 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
951endef
952
David Howellsd183e6f2012-10-02 18:01:56 +0100953$(version_h): $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 $(call filechk,version.h)
955
Sam Ravnborg273b2812009-10-18 00:52:28 +0200956include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200957 $(call filechk,utsrelease.h)
958
Vegard Nossum179efcb2008-12-16 12:33:43 +0100959PHONY += headerdep
960headerdep:
Peter Foley9663d982011-04-26 17:17:11 -0400961 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
962 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +0100963
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964# ---------------------------------------------------------------------------
965
Paul Smith4f193362006-03-05 17:14:10 -0500966PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967depend dep:
968 @echo '*** Warning: make $@ is unnecessary now.'
969
970# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +0300971# Firmware install
972INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
973export INSTALL_FW_PATH
974
975PHONY += firmware_install
976firmware_install: FORCE
977 @mkdir -p $(objtree)/firmware
978 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
979
980# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100981# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +0100982
Sam Ravnborge6883b12008-06-05 16:43:46 +0200983#Default location for installed headers
984export INSTALL_HDR_PATH = $(objtree)/usr
985
Sam Ravnborge6883b12008-06-05 16:43:46 +0200986hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200987
988# If we do an all arch process set dst to asm-$(hdr-arch)
989hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +0200990
H. Peter Anvin052ad272011-11-17 13:17:35 -0800991PHONY += archheaders
992archheaders:
993
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300994PHONY += archscripts
995archscripts:
996
Sam Ravnborge6883b12008-06-05 16:43:46 +0200997PHONY += __headers
David Howellsd183e6f2012-10-02 18:01:56 +0100998__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -0700999 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001000
1001PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001002headers_install_all:
1003 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001004
David Woodhouse8d730cf2006-06-18 11:58:39 +01001005PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001006headers_install: __headers
David Howells10b63952012-10-02 18:01:57 +01001007 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1008 $(error Headers not exportable for the $(SRCARCH) architecture))
1009 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1010 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001011
Mike Frysinger1f857122007-02-14 00:33:02 -08001012PHONY += headers_check_all
1013headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001014 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001015
David Woodhouse68475352006-06-18 12:02:10 +01001016PHONY += headers_check
1017headers_check: headers_install
David Howells10b63952012-10-02 18:01:57 +01001018 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1019 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001020
David Woodhouse8d730cf2006-06-18 11:58:39 +01001021# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022# Modules
1023
1024ifdef CONFIG_MODULES
1025
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001026# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027
Michal Marek73d13932010-03-10 12:28:58 +01001028all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
1030# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001031#
1032# A module can be listed more than once in obj-m resulting in
1033# duplicate lines in modules.order files. Those are removed
1034# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035
Paul Smith4f193362006-03-05 17:14:10 -05001036PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001037modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001038 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001039 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001040 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001041 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042
Michal Mareka6c36632010-03-08 10:07:12 +01001043modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1044 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1045
Michal Marek73d13932010-03-10 12:28:58 +01001046%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001047 $(Q)$(MAKE) $(modbuiltin)=$*
1048
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049
1050# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001051PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001052modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053
1054# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001055PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056modules_install: _modinst_ _modinst_post
1057
Paul Smith4f193362006-03-05 17:14:10 -05001058PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001059_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 @rm -rf $(MODLIB)/kernel
1061 @rm -f $(MODLIB)/source
1062 @mkdir -p $(MODLIB)/kernel
1063 @ln -s $(srctree) $(MODLIB)/source
1064 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1065 rm -f $(MODLIB)/build ; \
1066 ln -s $(objtree) $(MODLIB)/build ; \
1067 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001068 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001069 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001070 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001072# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073# boot a modules.dep even before / is mounted read-write. However the
1074# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001075PHONY += _modinst_post
Linus Torvalds6d128e12013-07-10 19:02:51 -07001076_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001077 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001078 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079
Josh Boyerd890f512012-11-05 09:09:24 +10301080ifeq ($(CONFIG_MODULE_SIG), y)
1081PHONY += modules_sign
1082modules_sign:
1083 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1084endif
1085
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086else # CONFIG_MODULES
1087
1088# Modules not configured
1089# ---------------------------------------------------------------------------
1090
1091modules modules_install: FORCE
Michal Marek5369f552012-07-07 23:04:40 +02001092 @echo >&2
1093 @echo >&2 "The present kernel configuration has modules disabled."
1094 @echo >&2 "Type 'make config' and enable loadable module support."
1095 @echo >&2 "Then build a kernel with module support enabled."
1096 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 @exit 1
1098
1099endif # CONFIG_MODULES
1100
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101###
1102# Cleaning is done on three levels.
1103# make clean Delete most generated files
1104# Leave enough to build external modules
1105# make mrproper Delete the current configuration, and all generated files
1106# make distclean Remove editor backup files, patch leftover files and the like
1107
1108# Directories & files removed with 'make clean'
1109CLEAN_DIRS += $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
1111# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001112MRPROPER_DIRS += include/config usr/include include/generated \
Jason Cooper79192ca2014-04-07 18:30:29 +00001113 arch/*/include/generated .tmp_objdiff
David Howellsd183e6f2012-10-02 18:01:56 +01001114MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
Rusty Russelld5b71932012-10-02 14:35:24 +09301115 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1116 signing_key.priv signing_key.x509 x509.genkey \
1117 extra_certificates signing_key.x509.keyid \
Paul Gortmaker9c8cdb72014-02-13 16:28:58 -05001118 signing_key.x509.signer include/linux/version.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119
1120# clean - Delete most, but leave enough to build external modules
1121#
1122clean: rm-dirs := $(CLEAN_DIRS)
1123clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -07001124clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125
Pawel Mollbd1ee802012-10-29 11:23:02 +00001126PHONY += $(clean-dirs) clean archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127$(clean-dirs):
1128 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1129
Pawel Mollbd1ee802012-10-29 11:23:02 +00001130vmlinuxclean:
1131 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1132
1133clean: archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134
1135# mrproper - Delete all generated files, including .config
1136#
1137mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1138mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1139mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1140
Paul Smith4f193362006-03-05 17:14:10 -05001141PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142$(mrproper-dirs):
1143 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1144
1145mrproper: clean archmrproper $(mrproper-dirs)
1146 $(call cmd,rmdirs)
1147 $(call cmd,rmfiles)
1148
1149# distclean
1150#
Paul Smith4f193362006-03-05 17:14:10 -05001151PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152
1153distclean: mrproper
1154 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001155 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Masahiro Yamadaa03fcb502014-03-28 16:36:12 +09001157 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 -type f -print | xargs rm -f
1159
1160
1161# Packaging of the kernel to various formats
1162# ---------------------------------------------------------------------------
1163# rpm target kept for backward compatibility
1164package-dir := $(srctree)/scripts/package
1165
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001166%src-pkg: FORCE
1167 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001168%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001169 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001170rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001171 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
1173
1174# Brief documentation of the typical targets used
1175# ---------------------------------------------------------------------------
1176
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001177boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001179board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1180board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181
1182help:
1183 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001184 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001185 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001186 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001187 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 @echo ''
1189 @echo 'Configuration targets:'
1190 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1191 @echo ''
1192 @echo 'Other generic targets:'
1193 @echo ' all - Build all targets marked with [*]'
1194 @echo '* vmlinux - Build the bare kernel'
1195 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001196 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001197 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1198 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001200 @echo ' dir/file.[oisS] - Build specified target only'
1201 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1202 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001203 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001204 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 @echo ' tags/TAGS - Generate tags file for editors'
1206 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001207 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001208 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001209 @echo ' kernelversion - Output the version stored in Makefile'
Mike Marciniszync398ff02013-06-24 08:48:37 -04001210 @echo ' image_name - Output the image name'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001211 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001212 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001213 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 @echo ' checkstack - Generate a list of stack hogs'
1216 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001217 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001218 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001219 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001220 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001221 @echo ' headerdep - Detect inclusion cycles in headers'
1222 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1223 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001225 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 @echo ''
1227 @echo 'Documentation targets:'
1228 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1229 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001230 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001232 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 @echo ''
1234 @$(if $(boards), \
1235 $(foreach b, $(boards), \
1236 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1237 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001238 @$(if $(board-dirs), \
1239 $(foreach b, $(board-dirs), \
1240 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1241 printf " %-16s - Show all of the above\\n" help-boards; \
1242 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243
1244 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001245 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001247 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1248 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001249 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001250 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1251 @echo ' 1: warnings which may be relevant and do not occur too often'
1252 @echo ' 2: warnings which occur quite often but may still be relevant'
1253 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001254 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 @echo ''
1256 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1257 @echo 'For further info see the ./README file'
1258
1259
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001260help-board-dirs := $(addprefix help-,$(board-dirs))
1261
1262help-boards: $(help-board-dirs)
1263
1264boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1265
1266$(help-board-dirs): help-%:
1267 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1268 @$(if $(boards-per-dir), \
1269 $(foreach b, $(boards-per-dir), \
1270 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1271 echo '')
1272
1273
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274# Documentation targets
1275# ---------------------------------------------------------------------------
1276%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001277 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1279
1280else # KBUILD_EXTMOD
1281
1282###
1283# External module support.
1284# When building external modules the kernel used as basis is considered
1285# read-only, and no consistency checks are made and the make
1286# system is not used on the basis kernel. If updates are required
1287# in the basis kernel ordinary make commands (without M=...) must
1288# be used.
1289#
1290# The following are the only valid targets when building external
1291# modules.
1292# make M=dir clean Delete all automatically generated files
1293# make M=dir modules Make all modules in specified dir
1294# make M=dir Same as 'make M=dir modules'
1295# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001296# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297# Assumes install directory is already created
1298
1299# We are always building modules
1300KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001301PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001303 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304
Paul Smith4f193362006-03-05 17:14:10 -05001305PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306$(objtree)/Module.symvers:
1307 @test -e $(objtree)/Module.symvers || ( \
1308 echo; \
1309 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1310 echo " is missing; modules will have no dependencies and modversions."; \
1311 echo )
1312
1313module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001314PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315$(module-dirs): crmodverdir $(objtree)/Module.symvers
1316 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1317
1318modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001319 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001320 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321
Paul Smith4f193362006-03-05 17:14:10 -05001322PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001323modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001324
Paul Smith4f193362006-03-05 17:14:10 -05001325install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1326PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001327_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001328 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001329 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330
Paul Smith4f193362006-03-05 17:14:10 -05001331PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001332_emodinst_post: _emodinst_
1333 $(call cmd,depmod)
1334
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1336
Paul Smith4f193362006-03-05 17:14:10 -05001337PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338$(clean-dirs):
1339 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1340
1341clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001342clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343
1344help:
1345 @echo ' Building external modules.'
1346 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1347 @echo ''
1348 @echo ' modules - default target, build the module(s)'
1349 @echo ' modules_install - install the module'
1350 @echo ' clean - remove generated files in module directory only'
1351 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001352
1353# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001354PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001355prepare: ;
1356scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357endif # KBUILD_EXTMOD
1358
Michal Marek88d7be02010-09-06 12:00:08 +02001359clean: $(clean-dirs)
1360 $(call cmd,rmdirs)
1361 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001362 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001363 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
David Howellsaddbcdb2012-09-26 10:09:50 +01001364 -o -name '*.ko.*' \
Michal Marek88d7be02010-09-06 12:00:08 +02001365 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1366 -o -name '*.symtypes' -o -name 'modules.order' \
1367 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1368 -o -name '*.gcno' \) -type f -print | xargs rm -f
1369
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370# Generate tags for editors
1371# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001372quiet_cmd_tags = GEN $@
1373 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001375tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376 $(call cmd,tags)
1377
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378# Scripts to check various things for consistency
1379# ---------------------------------------------------------------------------
1380
Peter Foley279f3dd2011-04-26 17:15:01 -04001381PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1382
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001384 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001386 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387
1388versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001389 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001391 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392
Nicolas Palix74425ee2010-06-06 17:15:01 +02001393coccicheck:
1394 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1395
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396namespacecheck:
1397 $(PERL) $(srctree)/scripts/namespace.pl
1398
Adrian Bunk295ac052007-08-24 23:04:56 +02001399export_report:
1400 $(PERL) $(srctree)/scripts/export_report.pl
1401
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402endif #ifeq ($(config-targets),1)
1403endif #ifeq ($(mixed-targets),1)
1404
Mike Marciniszync398ff02013-06-24 08:48:37 -04001405PHONY += checkstack kernelrelease kernelversion image_name
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001406
Jeff Dike011e3a92006-12-13 00:34:12 -08001407# UML needs a little special treatment here. It wants to use the host
1408# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1409# else wants $(ARCH), including people doing cross-builds, which means
1410# that $(SUBARCH) doesn't work here.
1411ifeq ($(ARCH), um)
1412CHECKSTACK_ARCH := $(SUBARCH)
1413else
1414CHECKSTACK_ARCH := $(ARCH)
1415endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416checkstack:
1417 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001418 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001420kernelrelease:
1421 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001422
Sam Ravnborgcb584552006-01-09 21:20:34 +01001423kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001424 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
Mike Marciniszync398ff02013-06-24 08:48:37 -04001426image_name:
1427 @echo $(KBUILD_IMAGE)
1428
Borislav Petkovea01fa92012-04-11 18:36:18 +02001429# Clear a bunch of variables before executing the submake
1430tools/: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001431 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001432 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
Borislav Petkovea01fa92012-04-11 18:36:18 +02001433
1434tools/%: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001435 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001436 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
Borislav Petkovea01fa92012-04-11 18:36:18 +02001437
Sam Ravnborg06300b22006-01-25 07:13:18 +01001438# Single targets
1439# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001440# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001441# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001442# - build with separate output dir 'make O=...'
1443# - external modules
1444#
1445# target-dir => where to store outputfile
1446# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001447
Sam Ravnborg06300b22006-01-25 07:13:18 +01001448ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001449 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001450 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001451else
1452 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001453 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1454 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001455endif
1456
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001457%.s: %.c prepare scripts FORCE
1458 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1459%.i: %.c prepare scripts FORCE
1460 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1461%.o: %.c prepare scripts FORCE
1462 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1463%.lst: %.c prepare scripts FORCE
1464 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1465%.s: %.S prepare scripts FORCE
1466 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1467%.o: %.S prepare scripts FORCE
1468 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001469%.symtypes: %.c prepare scripts FORCE
1470 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001471
1472# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001473/: prepare scripts FORCE
1474 $(cmd_crmodverdir)
1475 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1476 $(build)=$(build-dir)
1477%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001478 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001479 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001480 $(build)=$(build-dir)
1481%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001482 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001483 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001484 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001485 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001486
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487# FIXME Should go into a make.lib or something
1488# ===========================================================================
1489
1490quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1491 cmd_rmdirs = rm -rf $(rm-dirs)
1492
1493quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1494 cmd_rmfiles = rm -f $(rm-files)
1495
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001496# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001497quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001498 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
Rusty Russellb92021b2013-03-15 15:04:17 +10301499 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001500
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001501# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001502# clean it up only when building all modules
1503cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1504 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506# read all saved command lines
1507
1508targets := $(wildcard $(sort $(targets)))
1509cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1510
1511ifneq ($(cmd_files),)
1512 $(cmd_files): ; # Do not try to update included dependency files
1513 include $(cmd_files)
1514endif
1515
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1517# Usage:
1518# $(Q)$(MAKE) $(clean)=dir
1519clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1520
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521endif # skip-makefile
1522
Paul Smith4f193362006-03-05 17:14:10 -05001523PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001525
Paul Smith4f193362006-03-05 17:14:10 -05001526# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001527# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001528.PHONY: $(PHONY)