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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 Torvaldsd1db0ee2014-04-27 19:29:27 -07004EXTRAVERSION = -rc3
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 := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106endif
107
Borislav Petkov4a5838a2011-03-01 09:35:29 +0100108ifeq ("$(origin W)", "command line")
Sam Ravnborg28bc20d2011-04-27 22:15:27 +0200109 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
Borislav Petkov4a5838a2011-03-01 09:35:29 +0100110endif
111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112# That's our default target when none is given on the command line
Paul Smith4f193362006-03-05 17:14:10 -0500113PHONY := _all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114_all:
115
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100116# Cancel implicit rules on top Makefile
117$(CURDIR)/Makefile Makefile: ;
118
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119ifneq ($(KBUILD_OUTPUT),)
120# Invoke a second make in the output directory, passing relevant variables
121# check that the output directory actually exists
122saved-output := $(KBUILD_OUTPUT)
Masahiro Yamada1c9e70a2014-03-31 16:41:36 +0900123KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
124 && /bin/pwd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125$(if $(KBUILD_OUTPUT),, \
Masahiro Yamada1c9e70a2014-03-31 16:41:36 +0900126 $(error failed to create output directory "$(saved-output)"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Milton Miller0b357862007-09-21 18:09:02 -0500128PHONY += $(MAKECMDGOALS) sub-make
129
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100130$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Charles Keepax16f89092012-10-15 13:49:12 +0100131 @:
Milton Miller0b357862007-09-21 18:09:02 -0500132
133sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200134 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
135 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500136 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
137 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139# Leave processing to above invocation of make
140skip-makefile := 1
141endif # ifneq ($(KBUILD_OUTPUT),)
142endif # ifeq ($(KBUILD_SRC),)
143
144# We process the rest of the Makefile if this is the final invocation of make
145ifeq ($(skip-makefile),)
146
147# If building an external module we do not care about the all: rule
148# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500149PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150ifeq ($(KBUILD_EXTMOD),)
151_all: all
152else
153_all: modules
154endif
155
156srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157objtree := $(CURDIR)
158src := $(srctree)
159obj := $(objtree)
160
Mattia Dongili0f558c32006-02-19 13:50:37 +0100161VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
Amerigo Wang11294232009-06-19 03:40:26 -0400163export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166# SUBARCH tells the usermode build what the underlying arch is. That is set
167# first, and if a usermode build is happening, the "ARCH=um" on the command
168# line overrides the setting of ARCH below. If a native build is happening,
169# then ARCH is assigned, getting whatever value it gets normally, and
170# SUBARCH is subsequently ignored.
171
David Woodhouseffee0de2012-12-20 21:51:55 +0000172SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
173 -e s/sun4u/sparc64/ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800175 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900176 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Will Deaconf1b99392013-01-18 19:00:47 +0000177 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
179# Cross compiling and selecting different set of gcc/bin-utils
180# ---------------------------------------------------------------------------
181#
182# When performing cross compilation for other architectures ARCH shall be set
183# to the target architecture. (See arch/* for the possibilities).
184# ARCH can be set during invocation of make:
185# make ARCH=ia64
186# Another way is to have ARCH set in the environment.
187# The default ARCH is the host where make is executed.
188
189# CROSS_COMPILE specify the prefix used for all executables used
190# during compilation. Only gcc and related bin-utils executables
191# are prefixed with $(CROSS_COMPILE).
192# CROSS_COMPILE can be set on the command line
193# make CROSS_COMPILE=ia64-linux-
194# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800195# A third alternative is to store a setting in .config so that plain
196# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197# Default value for CROSS_COMPILE is not to prefix executables
198# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200199ARCH ?= $(SUBARCH)
Roland McGrath84336462009-12-21 16:24:06 -0800200CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
202# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200203UTS_MACHINE := $(ARCH)
204SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
Sam Ravnborgd746d642007-11-12 20:14:19 +0100206# Additional ARCH settings for x86
207ifeq ($(ARCH),i386)
208 SRCARCH := x86
209endif
210ifeq ($(ARCH),x86_64)
211 SRCARCH := x86
212endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200213
Sam Ravnborg5e538792008-12-02 23:17:12 -0800214# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000215ifeq ($(ARCH),sparc32)
216 SRCARCH := sparc
217endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200218ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800219 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200220endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200221
Paul Mundt3cc000b2009-04-11 08:39:27 +0900222# Additional ARCH settings for sh
223ifeq ($(ARCH),sh64)
224 SRCARCH := sh
225endif
226
Chris Metcalf18aecc22011-05-04 14:38:26 -0400227# Additional ARCH settings for tile
Chris Metcalf6738d322011-05-25 15:24:00 -0400228ifeq ($(ARCH),tilepro)
229 SRCARCH := tile
230endif
Chris Metcalf18aecc22011-05-04 14:38:26 -0400231ifeq ($(ARCH),tilegx)
232 SRCARCH := tile
233endif
234
Sam Ravnborg5e538792008-12-02 23:17:12 -0800235# Where to locate arch specific headers
236hdr-arch := $(SRCARCH)
237
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700238KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500239export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700240
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241# SHELL used by kbuild
242CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
243 else if [ -x /bin/bash ]; then echo /bin/bash; \
244 else echo sh; fi ; fi)
245
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200246HOSTCC = gcc
247HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800248HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200249HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Behan Webster61163ef2013-09-03 22:27:23 -0400251ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
252HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
253 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
254endif
255
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200256# Decide whether to build built-in, modular, or both.
257# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
259KBUILD_MODULES :=
260KBUILD_BUILTIN := 1
261
262# If we have only "make modules", don't compile built-in objects.
263# When we're building modules with modversions, we need to consider
264# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200265# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267ifeq ($(MAKECMDGOALS),modules)
268 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
269endif
270
271# If we have "make <whatever> modules", compile modules
272# in addition to whatever we do anyway.
273# Just "make" or "make all" shall build modules as well
274
275ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
276 KBUILD_MODULES := 1
277endif
278
279ifeq ($(MAKECMDGOALS),)
280 KBUILD_MODULES := 1
281endif
282
Sam Ravnborge579d352005-07-27 08:10:10 +0200283export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
285
286# Beautify output
287# ---------------------------------------------------------------------------
288#
289# Normally, we echo the whole command before executing it. By making
290# that echo $($(quiet)$(cmd)), we now have the possibility to set
291# $(quiet) to choose other forms of output instead, e.g.
292#
293# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
294# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
295#
296# If $(quiet) is empty, the whole command will be printed.
297# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200298# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299# the variable $(silent_cmd_cc_o_c) doesn't exist.
300#
Adrian Bunka58a4142006-01-10 00:08:17 +0100301# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302# for commands that shall be hidden in non-verbose mode.
303#
304# $(Q)ln $@ :<
305#
306# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
307# If KBUILD_VERBOSE equals 1 then the above command is displayed.
308
309ifeq ($(KBUILD_VERBOSE),1)
310 quiet =
311 Q =
312else
313 quiet=quiet_
314 Q = @
315endif
316
317# If the user is running make -s (silent mode), suppress echoing of
318# commands
319
Emil Medvee36aaea2014-01-06 02:58:40 -0600320ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
321ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
322 quiet=silent_
323endif
324else # make-3.8x
Jason Wessele6ac89f2012-01-05 16:46:30 -0600325ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 quiet=silent_
327endif
Emil Medvee36aaea2014-01-06 02:58:40 -0600328endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
330export quiet Q KBUILD_VERBOSE
331
Behan Webster61163ef2013-09-03 22:27:23 -0400332ifneq ($(CC),)
333ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
334COMPILER := clang
335else
336COMPILER := gcc
337endif
338export COMPILER
339endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
341# Look for make include files relative to root of kernel src
342MAKEFLAGS += --include-dir=$(srctree)
343
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100344# We need some generic definitions (do not try to remake the file).
345$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800346include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
348# Make variables (CC, etc...)
349
350AS = $(CROSS_COMPILE)as
351LD = $(CROSS_COMPILE)ld
352CC = $(CROSS_COMPILE)gcc
353CPP = $(CC) -E
354AR = $(CROSS_COMPILE)ar
355NM = $(CROSS_COMPILE)nm
356STRIP = $(CROSS_COMPILE)strip
357OBJCOPY = $(CROSS_COMPILE)objcopy
358OBJDUMP = $(CROSS_COMPILE)objdump
359AWK = awk
360GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200361INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362DEPMOD = /sbin/depmod
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363PERL = perl
364CHECK = sparse
365
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100366CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
367 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200368CFLAGS_MODULE =
369AFLAGS_MODULE =
370LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371CFLAGS_KERNEL =
372AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700373CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375
David Howellsabbf1592012-10-02 18:01:26 +0100376# Use USERINCLUDE when you must reference the UAPI directories only.
377USERINCLUDE := \
378 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
379 -Iarch/$(hdr-arch)/include/generated/uapi \
380 -I$(srctree)/include/uapi \
381 -Iinclude/generated/uapi \
382 -include $(srctree)/include/linux/kconfig.h
383
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384# Use LINUXINCLUDE when you must reference the include/ directory.
385# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100386LINUXINCLUDE := \
387 -I$(srctree)/arch/$(hdr-arch)/include \
388 -Iarch/$(hdr-arch)/include/generated \
389 $(if $(KBUILD_SRC), -I$(srctree)/include) \
390 -Iinclude \
391 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100393KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200395KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700396 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300397 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800398 -Wno-format-security \
Behan Webster61163ef2013-09-03 22:27:23 -0400399 $(call cc-option,-fno-delete-null-pointer-checks,)
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200400KBUILD_AFLAGS_KERNEL :=
401KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200402KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200403KBUILD_AFLAGS_MODULE := -DMODULE
404KBUILD_CFLAGS_MODULE := -DMODULE
405KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700407# Read KERNELRELEASE from include/config/kernel.release (if it exists)
408KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Michal Marekcacd54e2011-05-30 13:36:07 +0200409KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100410
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200411export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100412export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200413export CPP AR NM STRIP OBJCOPY OBJDUMP
414export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200415export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
Sam Ravnborg06c50402007-10-15 22:17:25 +0200417export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700418export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200419export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200420export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200421export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200422export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423
424# When compiling out-of-tree modules, put MODVERDIR in the module
425# tree rather than in the kernel tree. The kernel tree might
426# even be read-only.
427export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
428
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429# Files to ignore in find ... statements
430
Prarit Bhargavaae63b2d2014-02-06 07:51:42 -0500431export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
432 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
433 -prune -o
Jesper Juhl450c6072012-02-16 22:49:15 +0100434export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
435 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
437# ===========================================================================
438# Rules shared between *config targets and build targets
439
440# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500441PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442scripts_basic:
443 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500444 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200446# To avoid any implicit rule to kick in, define an empty command.
447scripts/basic/%: scripts_basic ;
448
Paul Smith4f193362006-03-05 17:14:10 -0500449PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200450# outputmakefile generates a Makefile in the output directory, if using a
451# separate output directory. This allows convenient use of make in the
452# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200454ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100455 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200456 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
457 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
458endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200460# Support for using generic headers in asm-generic
461PHONY += asm-generic
462asm-generic:
463 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
Catalin Marinas3c5994c2012-10-17 12:25:44 +0100464 src=asm obj=arch/$(SRCARCH)/include/generated/asm
465 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
466 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200467
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468# To make sure we do not include .config for any of the *config targets
469# catch them early, and hand them over to scripts/kconfig/Makefile
470# It is allowed to specify more targets when calling make, including
471# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200472# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473# Detect when mixed targets is specified, and make a second invocation
474# of make so .config is not included in this case either (for *config).
475
David Howells10b63952012-10-02 18:01:57 +0100476version_h := include/generated/uapi/linux/version.h
David Howellsd183e6f2012-10-02 18:01:56 +0100477
Roman Zippel3eb3c742007-01-10 14:45:28 +0100478no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800479 cscope gtags TAGS tags help %docs check% coccicheck \
David Howellsd183e6f2012-10-02 18:01:56 +0100480 $(version_h) headers_% archheaders archscripts \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700481 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
483config-targets := 0
484mixed-targets := 0
485dot-config := 1
486
487ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
488 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
489 dot-config := 0
490 endif
491endif
492
493ifeq ($(KBUILD_EXTMOD),)
494 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
495 config-targets := 1
496 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
497 mixed-targets := 1
498 endif
499 endif
500endif
501
502ifeq ($(mixed-targets),1)
503# ===========================================================================
504# We're called with mixed targets (*config and build targets).
505# Handle them one by one.
506
507%:: FORCE
508 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
509
510else
511ifeq ($(config-targets),1)
512# ===========================================================================
513# *config targets only - make sure prerequisites are updated, and descend
514# in scripts/kconfig to make the *config target
515
516# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
517# KBUILD_DEFCONFIG may point out an alternative default configuration
518# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200519include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400520export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100522config: scripts_basic outputmakefile FORCE
523 $(Q)mkdir -p include/linux include/config
524 $(Q)$(MAKE) $(build)=scripts/kconfig $@
525
526%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700527 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 $(Q)$(MAKE) $(build)=scripts/kconfig $@
529
530else
531# ===========================================================================
532# Build targets only - this includes vmlinux, arch specific targets, clean
533# targets and others. In general all targets except *config targets.
534
535ifeq ($(KBUILD_EXTMOD),)
536# Additional helpers built in scripts/
537# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200538# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500539PHONY += scripts
Andreas Schwaba54292f2013-04-09 19:57:00 +0200540scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
541 asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 $(Q)$(MAKE) $(build)=$(@)
543
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544# Objects we will link into vmlinux / subdirs we need to visit
545init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100546drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547net-y := net/
548libs-y := lib/
549core-y := usr/
550endif # KBUILD_EXTMOD
551
552ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200553# Read in config
554-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200556ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557# Read in dependencies to all Kconfig* files, make sure to run
558# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700559-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700562$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
Roman Zippelc955cca2006-06-08 22:12:39 -0700564# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100565# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200566# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100567# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100568include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
570else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200571# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200572# but do not care if they are up-to-date. Use auto.conf to trigger the test
573PHONY += include/config/auto.conf
574
575include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200576 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200577 echo >&2; \
578 echo >&2 " ERROR: Kernel configuration is invalid."; \
579 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
580 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
581 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200582 /bin/false)
583
584endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700585
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586else
587# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700588include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200589endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
591# The all: target is the default when no target is given on the
592# command line.
593# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200594# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595all: vmlinux
596
597ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Arnd Bergmanne74fc972013-02-15 21:23:58 +0100598KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200600KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601endif
602
Paul Mundta1f42be2012-06-18 13:48:08 +0900603include $(srctree)/arch/$(SRCARCH)/Makefile
604
Andi Kleen1873e872012-03-28 11:51:18 -0700605ifdef CONFIG_READABLE_ASM
606# Disable optimizations that make assembler listings hard to read.
607# reorder blocks reorders the control in the function
608# ipa clone creates specialized cloned functions
609# partial inlining inlines only parts of functions
610KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
611 $(call cc-option,-fno-ipa-cp-clone,) \
612 $(call cc-option,-fno-partial-inlining)
613endif
614
Mike Frysinger08f67462009-06-04 16:29:08 -0700615ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100616KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
617endif
618
Kees Cook19952a92013-12-19 11:35:58 -0800619# Handle stack protector mode.
Kees Cook87796572013-12-19 11:35:59 -0800620ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
Kees Cook19952a92013-12-19 11:35:58 -0800621 stackp-flag := -fstack-protector
622 ifeq ($(call cc-option, $(stackp-flag)),)
Jan Beulich6c15b322014-02-25 15:01:48 -0800623 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
Fathi Boudra27b2a492014-02-25 15:01:46 -0800624 -fstack-protector not supported by compiler)
Kees Cook19952a92013-12-19 11:35:58 -0800625 endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800626else
627ifdef CONFIG_CC_STACKPROTECTOR_STRONG
Kees Cook87796572013-12-19 11:35:59 -0800628 stackp-flag := -fstack-protector-strong
629 ifeq ($(call cc-option, $(stackp-flag)),)
630 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
631 -fstack-protector-strong not supported by compiler)
632 endif
Kees Cook19952a92013-12-19 11:35:58 -0800633else
634 # Force off for distro compilers that enable stack protector by default.
635 stackp-flag := $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900636endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800637endif
Kees Cook19952a92013-12-19 11:35:58 -0800638KBUILD_CFLAGS += $(stackp-flag)
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100639
Behan Webster61163ef2013-09-03 22:27:23 -0400640ifeq ($(COMPILER),clang)
641KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
642KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
643KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
644KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
645KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
646# Quiet clang warning: comparison of unsigned expression < 0 is always false
647KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
648# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
649# source of a reference will be _MergedGlobals and not on of the whitelisted names.
650# See modpost pattern 2
651KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
652else
653
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400654# This warning generated too much noise in a regular build.
655# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200656KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Behan Webster61163ef2013-09-03 22:27:23 -0400657endif
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400658
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200660KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100662# Some targets (ARM with Thumb2, for example), can't be built with frame
663# pointers. For those, we don't have FUNCTION_TRACER automatically
664# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
665# incompatible with -fomit-frame-pointer with current GCC, so we don't use
666# -fomit-frame-pointer with FUNCTION_TRACER.
667ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200668KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100670endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671
672ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200673KBUILD_CFLAGS += -g
Geoff Levand7db43632013-12-11 23:34:40 +0000674KBUILD_AFLAGS += -Wa,--gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675endif
676
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200677ifdef CONFIG_DEBUG_INFO_REDUCED
Andi Kleene82c4bb2013-02-07 13:58:40 -0800678KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
679 $(call cc-option,-fno-var-tracking)
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200680endif
681
Steven Rostedt606576c2008-10-06 19:06:12 -0400682ifdef CONFIG_FUNCTION_TRACER
Steven Rostedta2546fa2011-02-09 13:15:59 -0500683ifdef CONFIG_HAVE_FENTRY
684CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
685endif
686KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
687KBUILD_AFLAGS += $(CC_USING_FENTRY)
Steven Rostedt72441cb2010-10-13 17:12:30 -0400688ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400689 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400690 BUILD_C_RECORDMCOUNT := y
691 export BUILD_C_RECORDMCOUNT
692 endif
693endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200694endif
695
Sam Ravnborg91341d42008-01-21 21:31:44 +0100696# We trigger additional mismatches with less inlining
697ifdef CONFIG_DEBUG_SECTION_MISMATCH
698KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
699endif
700
Sam Ravnborge8e69932005-04-30 16:51:42 -0700701# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700702NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700703CHECKFLAGS += $(NOSTDINC_FLAGS)
704
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200706KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200708# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200709KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400711# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700712KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700713
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700714# conserve stack if available
715KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
716
Sergei Trofimovich80970472013-09-13 14:51:40 -0700717# disallow errors like 'EXPORT_GPL(foo);' with missing header
718KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
719
720# require functions to have arguments in prototypes, not empty 'int foo()'
721KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
722
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800723# Prohibit date/time macros, which would make the build non-deterministic
724KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
725
Michal Marek40df7592011-04-20 13:45:30 +0200726# use the deterministic mode of AR if available
727KBUILD_ARFLAGS := $(call ar-option,D)
728
Jason Baronbf5438fc2010-09-17 11:09:00 -0400729# check for 'asm goto'
730ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
731 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
732endif
733
Sam Ravnborg06c50402007-10-15 22:17:25 +0200734# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Ozan Çağlayan70cfe022012-08-14 19:00:54 +0300735KBUILD_CPPFLAGS += $(KCPPFLAGS)
736KBUILD_AFLAGS += $(KAFLAGS)
737KBUILD_CFLAGS += $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200738
Roland McGrath18991192007-07-19 01:48:40 -0700739# Use --build-id when available.
740LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200741 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200742KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700743LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
744
David Howells5d7d18f2009-03-04 11:59:07 -0800745ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200746LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800747endif
748
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200750# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751# set in the environment
752# Also any assignments in arch/$(ARCH)/Makefile take precedence over
753# this default value
754export KBUILD_IMAGE ?= vmlinux
755
756#
757# INSTALL_PATH specifies where to place the updated kernel and system map
758# images. Default is /boot, but you can set it to other values
759export INSTALL_PATH ?= /boot
760
761#
Jason Cooperf4d4ffc2013-12-01 23:56:28 +0000762# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
763# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
764# an argument if needed. Otherwise it defaults to the kernel install path
765#
766export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
767
768#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
770# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200771# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772#
773
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100774MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775export MODLIB
776
Theodore Ts'oac031f22006-06-21 20:53:09 -0400777#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100778# INSTALL_MOD_STRIP, if defined, will cause modules to be
779# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
780# the default option --strip-debug will be used. Otherwise,
Gilles Espinasse177b2412011-01-09 08:59:49 +0100781# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100782
Theodore Ts'oac031f22006-06-21 20:53:09 -0400783ifdef INSTALL_MOD_STRIP
784ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100785mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400786else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100787mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400788endif # INSTALL_MOD_STRIP=1
789else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100790mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400791endif # INSTALL_MOD_STRIP
792export mod_strip_cmd
793
P J P1bf49dd2013-11-12 15:11:44 -0800794# Select initial ramdisk compression format, default is gzip(1).
795# This shall be used by the dracut(8) tool while creating an initramfs image.
796#
Jan Beulich7ac18152013-12-18 17:08:57 -0800797INITRD_COMPRESS-y := gzip
798INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
799INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
800INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
801INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
802INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
Linus Torvaldsb7000ad2013-12-20 16:52:45 -0800803# do not export INITRD_COMPRESS, since we didn't actually
804# choose a sane default compression above.
805# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
Michal Marekd9d8d7e2013-01-25 13:41:31 +1030807ifdef CONFIG_MODULE_SIG_ALL
Rusty Russelle2a666d2012-10-19 11:53:15 +1030808MODSECKEY = ./signing_key.priv
809MODPUBKEY = ./signing_key.x509
810export MODPUBKEY
Michal Marek4bc94102013-01-25 13:41:12 +1030811mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
Rusty Russelle2a666d2012-10-19 11:53:15 +1030812else
813mod_sign_cmd = true
814endif
815export mod_sign_cmd
816
817
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100819core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
822 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
823 $(net-y) $(net-m) $(libs-y) $(libs-m)))
824
825vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
826 $(init-n) $(init-) \
827 $(core-n) $(core-) $(drivers-n) $(drivers-) \
828 $(net-n) $(net-) $(libs-n) $(libs-))))
829
830init-y := $(patsubst %/, %/built-in.o, $(init-y))
831core-y := $(patsubst %/, %/built-in.o, $(core-y))
832drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
833net-y := $(patsubst %/, %/built-in.o, $(net-y))
834libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
835libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
836libs-y := $(libs-y1) $(libs-y2)
837
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200838# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200839export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
840export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
841export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200842export LDFLAGS_vmlinux
Michal Marek6615d6c2013-04-12 14:12:50 +0200843# used by scripts/pacmage/Makefile
844export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200846vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200848# Final link of vmlinux
849 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
850quiet_cmd_link-vmlinux = LINK $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200852# Include targets which we want to
853# execute if the rest of the kernel build went well.
854vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700855ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100856 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700857endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700858ifdef CONFIG_SAMPLES
859 $(Q)$(MAKE) $(build)=samples
860endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700861ifdef CONFIG_BUILD_DOCSRC
862 $(Q)$(MAKE) $(build)=Documentation
863endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200864 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200865
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866# The actual objects are generated when descending,
867# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200868$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
870# Handle descending into subdirectories listed in $(vmlinux-dirs)
871# Preset locale variables to speed up the build process. Limit locale
872# tweaks to this spot to avoid wrong language settings when running
873# make menuconfig etc.
874# Error messages still appears in the original language
875
Paul Smith4f193362006-03-05 17:14:10 -0500876PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200877$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 $(Q)$(MAKE) $(build)=$@
879
Michal Marek0d0e7712013-07-11 15:34:51 +0200880define filechk_kernel.release
881 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
882endef
883
Geert Uytterhoeven83a35e32013-06-28 11:27:31 +0200884# Store (new) KERNELRELEASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700885include/config/kernel.release: include/config/auto.conf FORCE
Michal Marek0d0e7712013-07-11 15:34:51 +0200886 $(call filechk,kernel.release)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100887
888
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200890# or the modules are listed in "prepare".
891# A multi level approach is used. prepareN is processed before prepareN-1.
892# archprepare is used in arch Makefiles and when processed asm symlink,
893# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200895# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500896PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200897
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200898# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899# and if so do:
900# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700901prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500903 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700904 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +0200905 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
906 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 /bin/false; \
908 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909endif
910
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200911# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200912prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913
David Howellsd183e6f2012-10-02 18:01:56 +0100914prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200915 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200916 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300918archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200919
920prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200921 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200922
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800924prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926# Generate some files
927# ---------------------------------------------------------------------------
928
929# KERNELRELEASE can change from a few different places, meaning version.h
930# needs to be updated, so this check is forced on all builds
931
932uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200933define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200935 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
936 exit 1; \
937 fi; \
938 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939endef
940
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200941define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +0100942 (echo \#define LINUX_VERSION_CODE $(shell \
943 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200944 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
945endef
946
David Howellsd183e6f2012-10-02 18:01:56 +0100947$(version_h): $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 $(call filechk,version.h)
949
Sam Ravnborg273b2812009-10-18 00:52:28 +0200950include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200951 $(call filechk,utsrelease.h)
952
Vegard Nossum179efcb2008-12-16 12:33:43 +0100953PHONY += headerdep
954headerdep:
Peter Foley9663d982011-04-26 17:17:11 -0400955 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
956 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +0100957
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958# ---------------------------------------------------------------------------
959
Paul Smith4f193362006-03-05 17:14:10 -0500960PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961depend dep:
962 @echo '*** Warning: make $@ is unnecessary now.'
963
964# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +0300965# Firmware install
966INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
967export INSTALL_FW_PATH
968
969PHONY += firmware_install
970firmware_install: FORCE
971 @mkdir -p $(objtree)/firmware
972 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
973
974# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100975# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +0100976
Sam Ravnborge6883b12008-06-05 16:43:46 +0200977#Default location for installed headers
978export INSTALL_HDR_PATH = $(objtree)/usr
979
Sam Ravnborge6883b12008-06-05 16:43:46 +0200980hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200981
982# If we do an all arch process set dst to asm-$(hdr-arch)
983hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +0200984
H. Peter Anvin052ad272011-11-17 13:17:35 -0800985PHONY += archheaders
986archheaders:
987
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300988PHONY += archscripts
989archscripts:
990
Sam Ravnborge6883b12008-06-05 16:43:46 +0200991PHONY += __headers
David Howellsd183e6f2012-10-02 18:01:56 +0100992__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -0700993 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100994
995PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200996headers_install_all:
997 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +0100998
David Woodhouse8d730cf2006-06-18 11:58:39 +0100999PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001000headers_install: __headers
David Howells10b63952012-10-02 18:01:57 +01001001 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1002 $(error Headers not exportable for the $(SRCARCH) architecture))
1003 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1004 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001005
Mike Frysinger1f857122007-02-14 00:33:02 -08001006PHONY += headers_check_all
1007headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001008 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001009
David Woodhouse68475352006-06-18 12:02:10 +01001010PHONY += headers_check
1011headers_check: headers_install
David Howells10b63952012-10-02 18:01:57 +01001012 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1013 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001014
David Woodhouse8d730cf2006-06-18 11:58:39 +01001015# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016# Modules
1017
1018ifdef CONFIG_MODULES
1019
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001020# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021
Michal Marek73d13932010-03-10 12:28:58 +01001022all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
1024# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001025#
1026# A module can be listed more than once in obj-m resulting in
1027# duplicate lines in modules.order files. Those are removed
1028# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
Paul Smith4f193362006-03-05 17:14:10 -05001030PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001031modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001032 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001033 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001034 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -04001035 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036
Michal Mareka6c36632010-03-08 10:07:12 +01001037modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1038 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1039
Michal Marek73d13932010-03-10 12:28:58 +01001040%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001041 $(Q)$(MAKE) $(modbuiltin)=$*
1042
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043
1044# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001045PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001046modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
1048# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001049PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050modules_install: _modinst_ _modinst_post
1051
Paul Smith4f193362006-03-05 17:14:10 -05001052PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001053_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 @rm -rf $(MODLIB)/kernel
1055 @rm -f $(MODLIB)/source
1056 @mkdir -p $(MODLIB)/kernel
1057 @ln -s $(srctree) $(MODLIB)/source
1058 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1059 rm -f $(MODLIB)/build ; \
1060 ln -s $(objtree) $(MODLIB)/build ; \
1061 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001062 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001063 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001064 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001066# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067# boot a modules.dep even before / is mounted read-write. However the
1068# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001069PHONY += _modinst_post
Linus Torvalds6d128e12013-07-10 19:02:51 -07001070_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001071 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001072 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073
Josh Boyerd890f512012-11-05 09:09:24 +10301074ifeq ($(CONFIG_MODULE_SIG), y)
1075PHONY += modules_sign
1076modules_sign:
1077 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1078endif
1079
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080else # CONFIG_MODULES
1081
1082# Modules not configured
1083# ---------------------------------------------------------------------------
1084
1085modules modules_install: FORCE
Michal Marek5369f552012-07-07 23:04:40 +02001086 @echo >&2
1087 @echo >&2 "The present kernel configuration has modules disabled."
1088 @echo >&2 "Type 'make config' and enable loadable module support."
1089 @echo >&2 "Then build a kernel with module support enabled."
1090 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 @exit 1
1092
1093endif # CONFIG_MODULES
1094
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095###
1096# Cleaning is done on three levels.
1097# make clean Delete most generated files
1098# Leave enough to build external modules
1099# make mrproper Delete the current configuration, and all generated files
1100# make distclean Remove editor backup files, patch leftover files and the like
1101
1102# Directories & files removed with 'make clean'
1103CLEAN_DIRS += $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104
1105# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001106MRPROPER_DIRS += include/config usr/include include/generated \
Jason Cooper79192ca2014-04-07 18:30:29 +00001107 arch/*/include/generated .tmp_objdiff
David Howellsd183e6f2012-10-02 18:01:56 +01001108MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
Rusty Russelld5b71932012-10-02 14:35:24 +09301109 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1110 signing_key.priv signing_key.x509 x509.genkey \
1111 extra_certificates signing_key.x509.keyid \
Paul Gortmaker9c8cdb72014-02-13 16:28:58 -05001112 signing_key.x509.signer include/linux/version.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113
1114# clean - Delete most, but leave enough to build external modules
1115#
1116clean: rm-dirs := $(CLEAN_DIRS)
1117clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -07001118clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119
Pawel Mollbd1ee802012-10-29 11:23:02 +00001120PHONY += $(clean-dirs) clean archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121$(clean-dirs):
1122 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1123
Pawel Mollbd1ee802012-10-29 11:23:02 +00001124vmlinuxclean:
1125 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1126
1127clean: archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128
1129# mrproper - Delete all generated files, including .config
1130#
1131mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1132mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1133mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1134
Paul Smith4f193362006-03-05 17:14:10 -05001135PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136$(mrproper-dirs):
1137 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1138
1139mrproper: clean archmrproper $(mrproper-dirs)
1140 $(call cmd,rmdirs)
1141 $(call cmd,rmfiles)
1142
1143# distclean
1144#
Paul Smith4f193362006-03-05 17:14:10 -05001145PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146
1147distclean: mrproper
1148 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001149 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Masahiro Yamadaa03fcb502014-03-28 16:36:12 +09001151 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 -type f -print | xargs rm -f
1153
1154
1155# Packaging of the kernel to various formats
1156# ---------------------------------------------------------------------------
1157# rpm target kept for backward compatibility
1158package-dir := $(srctree)/scripts/package
1159
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001160%src-pkg: FORCE
1161 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001162%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001163 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001164rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001165 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
1167
1168# Brief documentation of the typical targets used
1169# ---------------------------------------------------------------------------
1170
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001171boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001173board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1174board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175
1176help:
1177 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001178 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001179 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001180 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001181 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 @echo ''
1183 @echo 'Configuration targets:'
1184 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1185 @echo ''
1186 @echo 'Other generic targets:'
1187 @echo ' all - Build all targets marked with [*]'
1188 @echo '* vmlinux - Build the bare kernel'
1189 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001190 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001191 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1192 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001194 @echo ' dir/file.[oisS] - Build specified target only'
1195 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1196 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001197 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001198 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 @echo ' tags/TAGS - Generate tags file for editors'
1200 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001201 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001202 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001203 @echo ' kernelversion - Output the version stored in Makefile'
Mike Marciniszync398ff02013-06-24 08:48:37 -04001204 @echo ' image_name - Output the image name'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001205 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001206 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001207 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209 @echo ' checkstack - Generate a list of stack hogs'
1210 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001211 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001212 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001213 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001214 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001215 @echo ' headerdep - Detect inclusion cycles in headers'
1216 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1217 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001219 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 @echo ''
1221 @echo 'Documentation targets:'
1222 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1223 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001224 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001226 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 @echo ''
1228 @$(if $(boards), \
1229 $(foreach b, $(boards), \
1230 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1231 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001232 @$(if $(board-dirs), \
1233 $(foreach b, $(board-dirs), \
1234 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1235 printf " %-16s - Show all of the above\\n" help-boards; \
1236 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237
1238 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001239 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001241 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1242 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001243 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001244 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1245 @echo ' 1: warnings which may be relevant and do not occur too often'
1246 @echo ' 2: warnings which occur quite often but may still be relevant'
1247 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001248 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 @echo ''
1250 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1251 @echo 'For further info see the ./README file'
1252
1253
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001254help-board-dirs := $(addprefix help-,$(board-dirs))
1255
1256help-boards: $(help-board-dirs)
1257
1258boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1259
1260$(help-board-dirs): help-%:
1261 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1262 @$(if $(boards-per-dir), \
1263 $(foreach b, $(boards-per-dir), \
1264 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1265 echo '')
1266
1267
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268# Documentation targets
1269# ---------------------------------------------------------------------------
1270%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001271 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1273
1274else # KBUILD_EXTMOD
1275
1276###
1277# External module support.
1278# When building external modules the kernel used as basis is considered
1279# read-only, and no consistency checks are made and the make
1280# system is not used on the basis kernel. If updates are required
1281# in the basis kernel ordinary make commands (without M=...) must
1282# be used.
1283#
1284# The following are the only valid targets when building external
1285# modules.
1286# make M=dir clean Delete all automatically generated files
1287# make M=dir modules Make all modules in specified dir
1288# make M=dir Same as 'make M=dir modules'
1289# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001290# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291# Assumes install directory is already created
1292
1293# We are always building modules
1294KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001295PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001297 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298
Paul Smith4f193362006-03-05 17:14:10 -05001299PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300$(objtree)/Module.symvers:
1301 @test -e $(objtree)/Module.symvers || ( \
1302 echo; \
1303 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1304 echo " is missing; modules will have no dependencies and modversions."; \
1305 echo )
1306
1307module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001308PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309$(module-dirs): crmodverdir $(objtree)/Module.symvers
1310 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1311
1312modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001313 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001314 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315
Paul Smith4f193362006-03-05 17:14:10 -05001316PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001317modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001318
Paul Smith4f193362006-03-05 17:14:10 -05001319install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1320PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001321_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001322 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001323 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324
Paul Smith4f193362006-03-05 17:14:10 -05001325PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001326_emodinst_post: _emodinst_
1327 $(call cmd,depmod)
1328
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1330
Paul Smith4f193362006-03-05 17:14:10 -05001331PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332$(clean-dirs):
1333 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1334
1335clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001336clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337
1338help:
1339 @echo ' Building external modules.'
1340 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1341 @echo ''
1342 @echo ' modules - default target, build the module(s)'
1343 @echo ' modules_install - install the module'
1344 @echo ' clean - remove generated files in module directory only'
1345 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001346
1347# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001348PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001349prepare: ;
1350scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351endif # KBUILD_EXTMOD
1352
Michal Marek88d7be02010-09-06 12:00:08 +02001353clean: $(clean-dirs)
1354 $(call cmd,rmdirs)
1355 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001356 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001357 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
David Howellsaddbcdb2012-09-26 10:09:50 +01001358 -o -name '*.ko.*' \
Michal Marek88d7be02010-09-06 12:00:08 +02001359 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1360 -o -name '*.symtypes' -o -name 'modules.order' \
1361 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1362 -o -name '*.gcno' \) -type f -print | xargs rm -f
1363
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364# Generate tags for editors
1365# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001366quiet_cmd_tags = GEN $@
1367 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001369tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 $(call cmd,tags)
1371
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372# Scripts to check various things for consistency
1373# ---------------------------------------------------------------------------
1374
Peter Foley279f3dd2011-04-26 17:15:01 -04001375PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1376
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001378 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001380 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381
1382versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001383 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001385 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
Nicolas Palix74425ee2010-06-06 17:15:01 +02001387coccicheck:
1388 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1389
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390namespacecheck:
1391 $(PERL) $(srctree)/scripts/namespace.pl
1392
Adrian Bunk295ac052007-08-24 23:04:56 +02001393export_report:
1394 $(PERL) $(srctree)/scripts/export_report.pl
1395
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396endif #ifeq ($(config-targets),1)
1397endif #ifeq ($(mixed-targets),1)
1398
Mike Marciniszync398ff02013-06-24 08:48:37 -04001399PHONY += checkstack kernelrelease kernelversion image_name
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001400
Jeff Dike011e3a92006-12-13 00:34:12 -08001401# UML needs a little special treatment here. It wants to use the host
1402# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1403# else wants $(ARCH), including people doing cross-builds, which means
1404# that $(SUBARCH) doesn't work here.
1405ifeq ($(ARCH), um)
1406CHECKSTACK_ARCH := $(SUBARCH)
1407else
1408CHECKSTACK_ARCH := $(ARCH)
1409endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410checkstack:
1411 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001412 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001414kernelrelease:
1415 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001416
Sam Ravnborgcb584552006-01-09 21:20:34 +01001417kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001418 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419
Mike Marciniszync398ff02013-06-24 08:48:37 -04001420image_name:
1421 @echo $(KBUILD_IMAGE)
1422
Borislav Petkovea01fa92012-04-11 18:36:18 +02001423# Clear a bunch of variables before executing the submake
1424tools/: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001425 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001426 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
Borislav Petkovea01fa92012-04-11 18:36:18 +02001427
1428tools/%: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001429 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001430 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
Borislav Petkovea01fa92012-04-11 18:36:18 +02001431
Sam Ravnborg06300b22006-01-25 07:13:18 +01001432# Single targets
1433# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001434# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001435# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001436# - build with separate output dir 'make O=...'
1437# - external modules
1438#
1439# target-dir => where to store outputfile
1440# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001441
Sam Ravnborg06300b22006-01-25 07:13:18 +01001442ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001443 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001444 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001445else
1446 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001447 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1448 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001449endif
1450
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001451%.s: %.c prepare scripts FORCE
1452 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1453%.i: %.c prepare scripts FORCE
1454 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1455%.o: %.c prepare scripts FORCE
1456 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1457%.lst: %.c prepare scripts FORCE
1458 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1459%.s: %.S prepare scripts FORCE
1460 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1461%.o: %.S prepare scripts FORCE
1462 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001463%.symtypes: %.c prepare scripts FORCE
1464 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001465
1466# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001467/: prepare scripts FORCE
1468 $(cmd_crmodverdir)
1469 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1470 $(build)=$(build-dir)
1471%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001472 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001473 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001474 $(build)=$(build-dir)
1475%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001476 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001477 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001478 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001479 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001480
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481# FIXME Should go into a make.lib or something
1482# ===========================================================================
1483
1484quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1485 cmd_rmdirs = rm -rf $(rm-dirs)
1486
1487quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1488 cmd_rmfiles = rm -f $(rm-files)
1489
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001490# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001491quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001492 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
Rusty Russellb92021b2013-03-15 15:04:17 +10301493 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001494
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001495# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001496# clean it up only when building all modules
1497cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1498 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500# read all saved command lines
1501
1502targets := $(wildcard $(sort $(targets)))
1503cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1504
1505ifneq ($(cmd_files),)
1506 $(cmd_files): ; # Do not try to update included dependency files
1507 include $(cmd_files)
1508endif
1509
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1511# Usage:
1512# $(Q)$(MAKE) $(clean)=dir
1513clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1514
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515endif # skip-makefile
1516
Paul Smith4f193362006-03-05 17:14:10 -05001517PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001519
Paul Smith4f193362006-03-05 17:14:10 -05001520# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001521# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001522.PHONY: $(PHONY)