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Linus Torvalds55922c92011-05-29 17:43:36 -07001VERSION = 3
Linus Torvalds38dbfb52014-02-02 16:42:13 -08002PATCHLEVEL = 14
Linus Torvalds55922c92011-05-29 17:43:36 -07003SUBLEVEL = 0
Linus Torvaldsb28a9602014-02-09 18:15:47 -08004EXTRAVERSION = -rc2
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)
123KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
124$(if $(KBUILD_OUTPUT),, \
125 $(error output directory "$(saved-output)" does not exist))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Milton Miller0b357862007-09-21 18:09:02 -0500127PHONY += $(MAKECMDGOALS) sub-make
128
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100129$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Charles Keepax16f89092012-10-15 13:49:12 +0100130 @:
Milton Miller0b357862007-09-21 18:09:02 -0500131
132sub-make: FORCE
Sam Ravnborg23a45e22005-07-27 09:12:07 +0200133 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
134 KBUILD_SRC=$(CURDIR) \
Milton Miller0b357862007-09-21 18:09:02 -0500135 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
136 $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
138# Leave processing to above invocation of make
139skip-makefile := 1
140endif # ifneq ($(KBUILD_OUTPUT),)
141endif # ifeq ($(KBUILD_SRC),)
142
143# We process the rest of the Makefile if this is the final invocation of make
144ifeq ($(skip-makefile),)
145
146# If building an external module we do not care about the all: rule
147# but instead _all depend on modules
Paul Smith4f193362006-03-05 17:14:10 -0500148PHONY += all
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149ifeq ($(KBUILD_EXTMOD),)
150_all: all
151else
152_all: modules
153endif
154
155srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156objtree := $(CURDIR)
157src := $(srctree)
158obj := $(objtree)
159
Mattia Dongili0f558c32006-02-19 13:50:37 +0100160VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
Amerigo Wang11294232009-06-19 03:40:26 -0400162export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165# SUBARCH tells the usermode build what the underlying arch is. That is set
166# first, and if a usermode build is happening, the "ARCH=um" on the command
167# line overrides the setting of ARCH below. If a native build is happening,
168# then ARCH is assigned, getting whatever value it gets normally, and
169# SUBARCH is subsequently ignored.
170
David Woodhouseffee0de2012-12-20 21:51:55 +0000171SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
172 -e s/sun4u/sparc64/ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800174 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900175 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Will Deaconf1b99392013-01-18 19:00:47 +0000176 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
178# Cross compiling and selecting different set of gcc/bin-utils
179# ---------------------------------------------------------------------------
180#
181# When performing cross compilation for other architectures ARCH shall be set
182# to the target architecture. (See arch/* for the possibilities).
183# ARCH can be set during invocation of make:
184# make ARCH=ia64
185# Another way is to have ARCH set in the environment.
186# The default ARCH is the host where make is executed.
187
188# CROSS_COMPILE specify the prefix used for all executables used
189# during compilation. Only gcc and related bin-utils executables
190# are prefixed with $(CROSS_COMPILE).
191# CROSS_COMPILE can be set on the command line
192# make CROSS_COMPILE=ia64-linux-
193# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800194# A third alternative is to store a setting in .config so that plain
195# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196# Default value for CROSS_COMPILE is not to prefix executables
197# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200198ARCH ?= $(SUBARCH)
Roland McGrath84336462009-12-21 16:24:06 -0800199CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200202UTS_MACHINE := $(ARCH)
203SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Sam Ravnborgd746d642007-11-12 20:14:19 +0100205# Additional ARCH settings for x86
206ifeq ($(ARCH),i386)
207 SRCARCH := x86
208endif
209ifeq ($(ARCH),x86_64)
210 SRCARCH := x86
211endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200212
Sam Ravnborg5e538792008-12-02 23:17:12 -0800213# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000214ifeq ($(ARCH),sparc32)
215 SRCARCH := sparc
216endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200217ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800218 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200219endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200220
Paul Mundt3cc000b2009-04-11 08:39:27 +0900221# Additional ARCH settings for sh
222ifeq ($(ARCH),sh64)
223 SRCARCH := sh
224endif
225
Chris Metcalf18aecc22011-05-04 14:38:26 -0400226# Additional ARCH settings for tile
Chris Metcalf6738d322011-05-25 15:24:00 -0400227ifeq ($(ARCH),tilepro)
228 SRCARCH := tile
229endif
Chris Metcalf18aecc22011-05-04 14:38:26 -0400230ifeq ($(ARCH),tilegx)
231 SRCARCH := tile
232endif
233
Sam Ravnborg5e538792008-12-02 23:17:12 -0800234# Where to locate arch specific headers
235hdr-arch := $(SRCARCH)
236
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700237KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500238export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240# SHELL used by kbuild
241CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
242 else if [ -x /bin/bash ]; then echo /bin/bash; \
243 else echo sh; fi ; fi)
244
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200245HOSTCC = gcc
246HOSTCXX = g++
Josh Triplett25583d42009-11-15 14:38:47 -0800247HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200248HOSTCXXFLAGS = -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200250# Decide whether to build built-in, modular, or both.
251# Normally, just do built-in.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
253KBUILD_MODULES :=
254KBUILD_BUILTIN := 1
255
256# If we have only "make modules", don't compile built-in objects.
257# When we're building modules with modversions, we need to consider
258# the built-in objects during the descend as well, in order to
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200259# make sure the checksums are up to date before we record them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261ifeq ($(MAKECMDGOALS),modules)
262 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
263endif
264
265# If we have "make <whatever> modules", compile modules
266# in addition to whatever we do anyway.
267# Just "make" or "make all" shall build modules as well
268
269ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
270 KBUILD_MODULES := 1
271endif
272
273ifeq ($(MAKECMDGOALS),)
274 KBUILD_MODULES := 1
275endif
276
Sam Ravnborge579d352005-07-27 08:10:10 +0200277export KBUILD_MODULES KBUILD_BUILTIN
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
279
280# Beautify output
281# ---------------------------------------------------------------------------
282#
283# Normally, we echo the whole command before executing it. By making
284# that echo $($(quiet)$(cmd)), we now have the possibility to set
285# $(quiet) to choose other forms of output instead, e.g.
286#
287# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
288# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
289#
290# If $(quiet) is empty, the whole command will be printed.
291# If it is set to "quiet_", only the short version will be printed.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200292# If it is set to "silent_", nothing will be printed at all, since
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293# the variable $(silent_cmd_cc_o_c) doesn't exist.
294#
Adrian Bunka58a4142006-01-10 00:08:17 +0100295# A simple variant is to prefix commands with $(Q) - that's useful
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296# for commands that shall be hidden in non-verbose mode.
297#
298# $(Q)ln $@ :<
299#
300# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
301# If KBUILD_VERBOSE equals 1 then the above command is displayed.
302
303ifeq ($(KBUILD_VERBOSE),1)
304 quiet =
305 Q =
306else
307 quiet=quiet_
308 Q = @
309endif
310
311# If the user is running make -s (silent mode), suppress echoing of
312# commands
313
Emil Medvee36aaea2014-01-06 02:58:40 -0600314ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
315ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
316 quiet=silent_
317endif
318else # make-3.8x
Jason Wessele6ac89f2012-01-05 16:46:30 -0600319ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 quiet=silent_
321endif
Emil Medvee36aaea2014-01-06 02:58:40 -0600322endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324export quiet Q KBUILD_VERBOSE
325
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
327# Look for make include files relative to root of kernel src
328MAKEFLAGS += --include-dir=$(srctree)
329
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100330# We need some generic definitions (do not try to remake the file).
331$(srctree)/scripts/Kbuild.include: ;
Oleg Verych15964862006-12-10 02:18:40 -0800332include $(srctree)/scripts/Kbuild.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
334# Make variables (CC, etc...)
335
336AS = $(CROSS_COMPILE)as
337LD = $(CROSS_COMPILE)ld
338CC = $(CROSS_COMPILE)gcc
339CPP = $(CC) -E
340AR = $(CROSS_COMPILE)ar
341NM = $(CROSS_COMPILE)nm
342STRIP = $(CROSS_COMPILE)strip
343OBJCOPY = $(CROSS_COMPILE)objcopy
344OBJDUMP = $(CROSS_COMPILE)objdump
345AWK = awk
346GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200347INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348DEPMOD = /sbin/depmod
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349PERL = perl
350CHECK = sparse
351
Hannes Eder80a7d1d92008-12-27 22:38:44 +0100352CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
353 -Wbitwise -Wno-return-void $(CF)
Sam Ravnborg65881692010-07-28 17:33:09 +0200354CFLAGS_MODULE =
355AFLAGS_MODULE =
356LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357CFLAGS_KERNEL =
358AFLAGS_KERNEL =
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700359CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361
David Howellsabbf1592012-10-02 18:01:26 +0100362# Use USERINCLUDE when you must reference the UAPI directories only.
363USERINCLUDE := \
364 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
365 -Iarch/$(hdr-arch)/include/generated/uapi \
366 -I$(srctree)/include/uapi \
367 -Iinclude/generated/uapi \
368 -include $(srctree)/include/linux/kconfig.h
369
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370# Use LINUXINCLUDE when you must reference the include/ directory.
371# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100372LINUXINCLUDE := \
373 -I$(srctree)/arch/$(hdr-arch)/include \
374 -Iarch/$(hdr-arch)/include/generated \
375 $(if $(KBUILD_SRC), -I$(srctree)/include) \
376 -Iinclude \
377 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
Sam Ravnborgd8672b42008-11-21 21:50:02 +0100379KBUILD_CPPFLAGS := -D__KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200381KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Dave Jones94bed2a2007-07-15 23:41:38 -0700382 -fno-strict-aliasing -fno-common \
Floris Kraaka8735822009-06-15 08:54:02 +0300383 -Werror-implicit-function-declaration \
Eugene Teoa3ca86a2009-07-15 14:59:10 +0800384 -Wno-format-security \
385 -fno-delete-null-pointer-checks
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200386KBUILD_AFLAGS_KERNEL :=
387KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg222d3942007-10-15 21:59:31 +0200388KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborg65881692010-07-28 17:33:09 +0200389KBUILD_AFLAGS_MODULE := -DMODULE
390KBUILD_CFLAGS_MODULE := -DMODULE
391KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700393# Read KERNELRELEASE from include/config/kernel.release (if it exists)
394KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
Michal Marekcacd54e2011-05-30 13:36:07 +0200395KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100396
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200397export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100398export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200399export CPP AR NM STRIP OBJCOPY OBJDUMP
400export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200401export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
Sam Ravnborg06c50402007-10-15 22:17:25 +0200403export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Peter Oberparleiter2521f2c2009-06-17 16:28:08 -0700404export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
Sam Ravnborg222d3942007-10-15 21:59:31 +0200405export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200406export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200407export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200408export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410# When compiling out-of-tree modules, put MODVERDIR in the module
411# tree rather than in the kernel tree. The kernel tree might
412# even be read-only.
413export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
414
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415# Files to ignore in find ... statements
416
Jesper Juhl450c6072012-02-16 22:49:15 +0100417RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
418 -o -name .pc -o -name .hg -o -name .git \) -prune -o
419export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
420 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
422# ===========================================================================
423# Rules shared between *config targets and build targets
424
425# Basic helpers built in scripts/
Paul Smith4f193362006-03-05 17:14:10 -0500426PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427scripts_basic:
428 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500429 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200431# To avoid any implicit rule to kick in, define an empty command.
432scripts/basic/%: scripts_basic ;
433
Paul Smith4f193362006-03-05 17:14:10 -0500434PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200435# outputmakefile generates a Makefile in the output directory, if using a
436# separate output directory. This allows convenient use of make in the
437# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200439ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100440 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200441 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
442 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
443endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200445# Support for using generic headers in asm-generic
446PHONY += asm-generic
447asm-generic:
448 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
Catalin Marinas3c5994c2012-10-17 12:25:44 +0100449 src=asm obj=arch/$(SRCARCH)/include/generated/asm
450 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
451 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200452
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453# To make sure we do not include .config for any of the *config targets
454# catch them early, and hand them over to scripts/kconfig/Makefile
455# It is allowed to specify more targets when calling make, including
456# mixing *config targets and build targets.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200457# For example 'make oldconfig all'.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458# Detect when mixed targets is specified, and make a second invocation
459# of make so .config is not included in this case either (for *config).
460
David Howells10b63952012-10-02 18:01:57 +0100461version_h := include/generated/uapi/linux/version.h
David Howellsd183e6f2012-10-02 18:01:56 +0100462
Roman Zippel3eb3c742007-01-10 14:45:28 +0100463no-dot-config-targets := clean mrproper distclean \
Jianbin Kangf4ed1002011-01-14 20:07:05 +0800464 cscope gtags TAGS tags help %docs check% coccicheck \
David Howellsd183e6f2012-10-02 18:01:56 +0100465 $(version_h) headers_% archheaders archscripts \
Linus Torvalds4aed2fd2010-08-06 09:30:52 -0700466 kernelversion %src-pkg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
468config-targets := 0
469mixed-targets := 0
470dot-config := 1
471
472ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
473 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
474 dot-config := 0
475 endif
476endif
477
478ifeq ($(KBUILD_EXTMOD),)
479 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
480 config-targets := 1
481 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
482 mixed-targets := 1
483 endif
484 endif
485endif
486
487ifeq ($(mixed-targets),1)
488# ===========================================================================
489# We're called with mixed targets (*config and build targets).
490# Handle them one by one.
491
492%:: FORCE
493 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
494
495else
496ifeq ($(config-targets),1)
497# ===========================================================================
498# *config targets only - make sure prerequisites are updated, and descend
499# in scripts/kconfig to make the *config target
500
501# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
502# KBUILD_DEFCONFIG may point out an alternative default configuration
503# used for 'make defconfig'
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200504include $(srctree)/arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400505export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100507config: scripts_basic outputmakefile FORCE
508 $(Q)mkdir -p include/linux include/config
509 $(Q)$(MAKE) $(build)=scripts/kconfig $@
510
511%config: scripts_basic outputmakefile FORCE
Roman Zippelc955cca2006-06-08 22:12:39 -0700512 $(Q)mkdir -p include/linux include/config
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 $(Q)$(MAKE) $(build)=scripts/kconfig $@
514
515else
516# ===========================================================================
517# Build targets only - this includes vmlinux, arch specific targets, clean
518# targets and others. In general all targets except *config targets.
519
520ifeq ($(KBUILD_EXTMOD),)
521# Additional helpers built in scripts/
522# Carefully list dependencies so we do not try to build scripts twice
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200523# in parallel
Paul Smith4f193362006-03-05 17:14:10 -0500524PHONY += scripts
Andreas Schwaba54292f2013-04-09 19:57:00 +0200525scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
526 asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 $(Q)$(MAKE) $(build)=$(@)
528
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529# Objects we will link into vmlinux / subdirs we need to visit
530init-y := init/
David Woodhouse4d2acfb2008-05-23 13:58:12 +0100531drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532net-y := net/
533libs-y := lib/
534core-y := usr/
535endif # KBUILD_EXTMOD
536
537ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200538# Read in config
539-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200541ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542# Read in dependencies to all Kconfig* files, make sure to run
543# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700544-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700547$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548
Roman Zippelc955cca2006-06-08 22:12:39 -0700549# If .config is newer than include/config/auto.conf, someone tinkered
Sam Ravnborg752625c2005-12-26 23:34:03 +0100550# with it and forgot to run make oldconfig.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200551# if auto.conf.cmd is missing then we are probably in a cleaned tree so
Sam Ravnborg752625c2005-12-26 23:34:03 +0100552# we execute the config step to be sure to catch updated Kconfig files
Michal Marekbc081dd2009-12-07 16:38:33 +0100553include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
555else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200556# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200557# but do not care if they are up-to-date. Use auto.conf to trigger the test
558PHONY += include/config/auto.conf
559
560include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200561 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200562 echo >&2; \
563 echo >&2 " ERROR: Kernel configuration is invalid."; \
564 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
565 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
566 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200567 /bin/false)
568
569endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700570
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571else
572# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700573include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200574endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575
576# The all: target is the default when no target is given on the
577# command line.
578# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200579# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580all: vmlinux
581
582ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Arnd Bergmanne74fc972013-02-15 21:23:58 +0100583KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200585KBUILD_CFLAGS += -O2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586endif
587
Paul Mundta1f42be2012-06-18 13:48:08 +0900588include $(srctree)/arch/$(SRCARCH)/Makefile
589
Andi Kleen1873e872012-03-28 11:51:18 -0700590ifdef CONFIG_READABLE_ASM
591# Disable optimizations that make assembler listings hard to read.
592# reorder blocks reorders the control in the function
593# ipa clone creates specialized cloned functions
594# partial inlining inlines only parts of functions
595KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
596 $(call cc-option,-fno-ipa-cp-clone,) \
597 $(call cc-option,-fno-partial-inlining)
598endif
599
Mike Frysinger08f67462009-06-04 16:29:08 -0700600ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100601KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
602endif
603
Kees Cook19952a92013-12-19 11:35:58 -0800604# Handle stack protector mode.
Kees Cook87796572013-12-19 11:35:59 -0800605ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
Kees Cook19952a92013-12-19 11:35:58 -0800606 stackp-flag := -fstack-protector
607 ifeq ($(call cc-option, $(stackp-flag)),)
608 $(warning Cannot use CONFIG_CC_STACKPROTECTOR: \
609 -fstack-protector not supported by compiler))
610 endif
Kees Cook87796572013-12-19 11:35:59 -0800611else ifdef CONFIG_CC_STACKPROTECTOR_STRONG
612 stackp-flag := -fstack-protector-strong
613 ifeq ($(call cc-option, $(stackp-flag)),)
614 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
615 -fstack-protector-strong not supported by compiler)
616 endif
Kees Cook19952a92013-12-19 11:35:58 -0800617else
618 # Force off for distro compilers that enable stack protector by default.
619 stackp-flag := $(call cc-option, -fno-stack-protector)
Tejun Heo5d707e92009-02-09 22:17:39 +0900620endif
Kees Cook19952a92013-12-19 11:35:58 -0800621KBUILD_CFLAGS += $(stackp-flag)
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100622
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400623# This warning generated too much noise in a regular build.
624# Use make W=1 to enable this warning (see scripts/Makefile.build)
Michal Marek8417da6f2011-05-02 12:51:15 +0200625KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Dave Jonesaf0e5d52011-04-21 17:28:13 -0400626
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200628KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100630# Some targets (ARM with Thumb2, for example), can't be built with frame
631# pointers. For those, we don't have FUNCTION_TRACER automatically
632# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
633# incompatible with -fomit-frame-pointer with current GCC, so we don't use
634# -fomit-frame-pointer with FUNCTION_TRACER.
635ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200636KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100638endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
640ifdef CONFIG_DEBUG_INFO
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200641KBUILD_CFLAGS += -g
Geoff Levand7db43632013-12-11 23:34:40 +0000642KBUILD_AFLAGS += -Wa,--gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643endif
644
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200645ifdef CONFIG_DEBUG_INFO_REDUCED
Andi Kleene82c4bb2013-02-07 13:58:40 -0800646KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
647 $(call cc-option,-fno-var-tracking)
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200648endif
649
Steven Rostedt606576c2008-10-06 19:06:12 -0400650ifdef CONFIG_FUNCTION_TRACER
Steven Rostedta2546fa2011-02-09 13:15:59 -0500651ifdef CONFIG_HAVE_FENTRY
652CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
653endif
654KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
655KBUILD_AFLAGS += $(CC_USING_FENTRY)
Steven Rostedt72441cb2010-10-13 17:12:30 -0400656ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400657 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400658 BUILD_C_RECORDMCOUNT := y
659 export BUILD_C_RECORDMCOUNT
660 endif
661endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200662endif
663
Sam Ravnborg91341d42008-01-21 21:31:44 +0100664# We trigger additional mismatches with less inlining
665ifdef CONFIG_DEBUG_SECTION_MISMATCH
666KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
667endif
668
Sam Ravnborge8e69932005-04-30 16:51:42 -0700669# arch Makefile may override CC so keep this after arch Makefile is included
Rik van Riele8f5bdb02005-05-16 21:53:46 -0700670NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700671CHECKFLAGS += $(NOSTDINC_FLAGS)
672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200674KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200676# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200677KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400679# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700680KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700681
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700682# conserve stack if available
683KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
684
Sergei Trofimovich80970472013-09-13 14:51:40 -0700685# disallow errors like 'EXPORT_GPL(foo);' with missing header
686KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
687
688# require functions to have arguments in prototypes, not empty 'int foo()'
689KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
690
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800691# Prohibit date/time macros, which would make the build non-deterministic
692KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
693
Michal Marek40df7592011-04-20 13:45:30 +0200694# use the deterministic mode of AR if available
695KBUILD_ARFLAGS := $(call ar-option,D)
696
Jason Baronbf5438fc2010-09-17 11:09:00 -0400697# check for 'asm goto'
698ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
699 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
700endif
701
Sam Ravnborg06c50402007-10-15 22:17:25 +0200702# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
Ozan Çağlayan70cfe022012-08-14 19:00:54 +0300703KBUILD_CPPFLAGS += $(KCPPFLAGS)
704KBUILD_AFLAGS += $(KAFLAGS)
705KBUILD_CFLAGS += $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200706
Roland McGrath18991192007-07-19 01:48:40 -0700707# Use --build-id when available.
708LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
Sam Ravnborgf86fd302009-09-19 10:14:33 +0200709 $(call cc-ldoption, -Wl$(comma)--build-id,))
Sam Ravnborg65881692010-07-28 17:33:09 +0200710KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700711LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
712
David Howells5d7d18f2009-03-04 11:59:07 -0800713ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200714LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800715endif
716
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200718# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719# set in the environment
720# Also any assignments in arch/$(ARCH)/Makefile take precedence over
721# this default value
722export KBUILD_IMAGE ?= vmlinux
723
724#
725# INSTALL_PATH specifies where to place the updated kernel and system map
726# images. Default is /boot, but you can set it to other values
727export INSTALL_PATH ?= /boot
728
729#
730# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
731# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200732# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733#
734
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100735MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736export MODLIB
737
Theodore Ts'oac031f22006-06-21 20:53:09 -0400738#
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100739# INSTALL_MOD_STRIP, if defined, will cause modules to be
740# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
741# the default option --strip-debug will be used. Otherwise,
Gilles Espinasse177b2412011-01-09 08:59:49 +0100742# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100743
Theodore Ts'oac031f22006-06-21 20:53:09 -0400744ifdef INSTALL_MOD_STRIP
745ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100746mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400747else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100748mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400749endif # INSTALL_MOD_STRIP=1
750else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100751mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400752endif # INSTALL_MOD_STRIP
753export mod_strip_cmd
754
P J P1bf49dd2013-11-12 15:11:44 -0800755# Select initial ramdisk compression format, default is gzip(1).
756# This shall be used by the dracut(8) tool while creating an initramfs image.
757#
Jan Beulich7ac18152013-12-18 17:08:57 -0800758INITRD_COMPRESS-y := gzip
759INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
760INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
761INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
762INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
763INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
Linus Torvaldsb7000ad2013-12-20 16:52:45 -0800764# do not export INITRD_COMPRESS, since we didn't actually
765# choose a sane default compression above.
766# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767
Michal Marekd9d8d7e2013-01-25 13:41:31 +1030768ifdef CONFIG_MODULE_SIG_ALL
Rusty Russelle2a666d2012-10-19 11:53:15 +1030769MODSECKEY = ./signing_key.priv
770MODPUBKEY = ./signing_key.x509
771export MODPUBKEY
Michal Marek4bc94102013-01-25 13:41:12 +1030772mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
Rusty Russelle2a666d2012-10-19 11:53:15 +1030773else
774mod_sign_cmd = true
775endif
776export mod_sign_cmd
777
778
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779ifeq ($(KBUILD_EXTMOD),)
Jens Axboe3a65dfe2005-11-04 08:43:35 +0100780core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781
782vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
783 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
784 $(net-y) $(net-m) $(libs-y) $(libs-m)))
785
786vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
787 $(init-n) $(init-) \
788 $(core-n) $(core-) $(drivers-n) $(drivers-) \
789 $(net-n) $(net-) $(libs-n) $(libs-))))
790
791init-y := $(patsubst %/, %/built-in.o, $(init-y))
792core-y := $(patsubst %/, %/built-in.o, $(core-y))
793drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
794net-y := $(patsubst %/, %/built-in.o, $(net-y))
795libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
796libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
797libs-y := $(libs-y1) $(libs-y2)
798
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200799# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200800export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
801export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
802export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200803export LDFLAGS_vmlinux
Michal Marek6615d6c2013-04-12 14:12:50 +0200804# used by scripts/pacmage/Makefile
805export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200807vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200809# Final link of vmlinux
810 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
811quiet_cmd_link-vmlinux = LINK $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200813# Include targets which we want to
814# execute if the rest of the kernel build went well.
815vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700816ifdef CONFIG_HEADERS_CHECK
David Woodhouse0e7af8d042006-10-13 16:04:23 +0100817 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
David Woodhouse0f836e5f2006-10-11 01:21:43 -0700818endif
Mathieu Desnoyers267c4022007-10-18 23:41:07 -0700819ifdef CONFIG_SAMPLES
820 $(Q)$(MAKE) $(build)=samples
821endif
Randy Dunlap3794f3e2008-08-12 15:09:06 -0700822ifdef CONFIG_BUILD_DOCSRC
823 $(Q)$(MAKE) $(build)=Documentation
824endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200825 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +0200826
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827# The actual objects are generated when descending,
828# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200829$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830
831# Handle descending into subdirectories listed in $(vmlinux-dirs)
832# Preset locale variables to speed up the build process. Limit locale
833# tweaks to this spot to avoid wrong language settings when running
834# make menuconfig etc.
835# Error messages still appears in the original language
836
Paul Smith4f193362006-03-05 17:14:10 -0500837PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200838$(vmlinux-dirs): prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 $(Q)$(MAKE) $(build)=$@
840
Michal Marek0d0e7712013-07-11 15:34:51 +0200841define filechk_kernel.release
842 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
843endef
844
Geert Uytterhoeven83a35e32013-06-28 11:27:31 +0200845# Store (new) KERNELRELEASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700846include/config/kernel.release: include/config/auto.conf FORCE
Michal Marek0d0e7712013-07-11 15:34:51 +0200847 $(call filechk,kernel.release)
Sam Ravnborgcb584552006-01-09 21:20:34 +0100848
849
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200851# or the modules are listed in "prepare".
852# A multi level approach is used. prepareN is processed before prepareN-1.
853# archprepare is used in arch Makefiles and when processed asm symlink,
854# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200856# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -0500857PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200858
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200859# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860# and if so do:
861# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -0700862prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -0500864 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -0700865 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +0200866 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
867 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 /bin/false; \
869 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870endif
871
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200872# prepare2 creates a makefile if using a separate output directory
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +0200873prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
David Howellsd183e6f2012-10-02 18:01:56 +0100875prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +0200876 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +0200877 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300879archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +0200880
881prepare0: archprepare FORCE
Sam Ravnborg8d36a622005-09-10 21:05:36 +0200882 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +0200883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884# All the preparing..
Robert P. J. Dayd395efb2007-02-14 00:33:01 -0800885prepare: prepare0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887# Generate some files
888# ---------------------------------------------------------------------------
889
890# KERNELRELEASE can change from a few different places, meaning version.h
891# needs to be updated, so this check is forced on all builds
892
893uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200894define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200896 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
897 exit 1; \
898 fi; \
899 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900endef
901
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200902define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +0100903 (echo \#define LINUX_VERSION_CODE $(shell \
904 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200905 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
906endef
907
David Howellsd183e6f2012-10-02 18:01:56 +0100908$(version_h): $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 $(call filechk,version.h)
910
Sam Ravnborg273b2812009-10-18 00:52:28 +0200911include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +0200912 $(call filechk,utsrelease.h)
913
Vegard Nossum179efcb2008-12-16 12:33:43 +0100914PHONY += headerdep
915headerdep:
Peter Foley9663d982011-04-26 17:17:11 -0400916 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
917 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +0100918
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919# ---------------------------------------------------------------------------
920
Paul Smith4f193362006-03-05 17:14:10 -0500921PHONY += depend dep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922depend dep:
923 @echo '*** Warning: make $@ is unnecessary now.'
924
925# ---------------------------------------------------------------------------
David Woodhouse88ecf812008-05-29 11:01:51 +0300926# Firmware install
927INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
928export INSTALL_FW_PATH
929
930PHONY += firmware_install
931firmware_install: FORCE
932 @mkdir -p $(objtree)/firmware
933 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
934
935# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +0100936# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +0100937
Sam Ravnborge6883b12008-06-05 16:43:46 +0200938#Default location for installed headers
939export INSTALL_HDR_PATH = $(objtree)/usr
940
Sam Ravnborge6883b12008-06-05 16:43:46 +0200941hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200942
943# If we do an all arch process set dst to asm-$(hdr-arch)
944hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
Sam Ravnborge6883b12008-06-05 16:43:46 +0200945
H. Peter Anvin052ad272011-11-17 13:17:35 -0800946PHONY += archheaders
947archheaders:
948
H. Peter Anvin6520fe52012-05-08 21:22:24 +0300949PHONY += archscripts
950archscripts:
951
Sam Ravnborge6883b12008-06-05 16:43:46 +0200952PHONY += __headers
David Howellsd183e6f2012-10-02 18:01:56 +0100953__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
Mike Waychisone1b702c2011-03-14 23:34:25 -0700954 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +0100955
956PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200957headers_install_all:
958 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +0100959
David Woodhouse8d730cf2006-06-18 11:58:39 +0100960PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +0200961headers_install: __headers
David Howells10b63952012-10-02 18:01:57 +0100962 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
963 $(error Headers not exportable for the $(SRCARCH) architecture))
964 $(Q)$(MAKE) $(hdr-inst)=include/uapi
965 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +0100966
Mike Frysinger1f857122007-02-14 00:33:02 -0800967PHONY += headers_check_all
968headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200969 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -0800970
David Woodhouse68475352006-06-18 12:02:10 +0100971PHONY += headers_check
972headers_check: headers_install
David Howells10b63952012-10-02 18:01:57 +0100973 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
974 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +0100975
David Woodhouse8d730cf2006-06-18 11:58:39 +0100976# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977# Modules
978
979ifdef CONFIG_MODULES
980
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200981# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Michal Marek73d13932010-03-10 12:28:58 +0100983all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984
985# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +0900986#
987# A module can be listed more than once in obj-m resulting in
988# duplicate lines in modules.order files. Those are removed
989# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990
Paul Smith4f193362006-03-05 17:14:10 -0500991PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +0200992modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +0900993 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -0500994 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +0200995 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
David Woodhouse44463f72008-07-25 14:17:19 -0400996 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997
Michal Mareka6c36632010-03-08 10:07:12 +0100998modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
999 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1000
Michal Marek73d13932010-03-10 12:28:58 +01001001%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001002 $(Q)$(MAKE) $(modbuiltin)=$*
1003
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
1005# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001006PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001007modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008
1009# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001010PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011modules_install: _modinst_ _modinst_post
1012
Paul Smith4f193362006-03-05 17:14:10 -05001013PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001014_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 @rm -rf $(MODLIB)/kernel
1016 @rm -f $(MODLIB)/source
1017 @mkdir -p $(MODLIB)/kernel
1018 @ln -s $(srctree) $(MODLIB)/source
1019 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1020 rm -f $(MODLIB)/build ; \
1021 ln -s $(objtree) $(MODLIB)/build ; \
1022 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001023 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001024 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001025 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001027# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028# boot a modules.dep even before / is mounted read-write. However the
1029# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001030PHONY += _modinst_post
Linus Torvalds6d128e12013-07-10 19:02:51 -07001031_modinst_post: _modinst_
David Woodhouse88ecf812008-05-29 11:01:51 +03001032 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001033 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034
Josh Boyerd890f512012-11-05 09:09:24 +10301035ifeq ($(CONFIG_MODULE_SIG), y)
1036PHONY += modules_sign
1037modules_sign:
1038 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1039endif
1040
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041else # CONFIG_MODULES
1042
1043# Modules not configured
1044# ---------------------------------------------------------------------------
1045
1046modules modules_install: FORCE
Michal Marek5369f552012-07-07 23:04:40 +02001047 @echo >&2
1048 @echo >&2 "The present kernel configuration has modules disabled."
1049 @echo >&2 "Type 'make config' and enable loadable module support."
1050 @echo >&2 "Then build a kernel with module support enabled."
1051 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 @exit 1
1053
1054endif # CONFIG_MODULES
1055
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056###
1057# Cleaning is done on three levels.
1058# make clean Delete most generated files
1059# Leave enough to build external modules
1060# make mrproper Delete the current configuration, and all generated files
1061# make distclean Remove editor backup files, patch leftover files and the like
1062
1063# Directories & files removed with 'make clean'
1064CLEAN_DIRS += $(MODVERDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
1066# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001067MRPROPER_DIRS += include/config usr/include include/generated \
1068 arch/*/include/generated
David Howellsd183e6f2012-10-02 18:01:56 +01001069MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
Rusty Russelld5b71932012-10-02 14:35:24 +09301070 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1071 signing_key.priv signing_key.x509 x509.genkey \
1072 extra_certificates signing_key.x509.keyid \
1073 signing_key.x509.signer
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074
1075# clean - Delete most, but leave enough to build external modules
1076#
1077clean: rm-dirs := $(CLEAN_DIRS)
1078clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -07001079clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080
Pawel Mollbd1ee802012-10-29 11:23:02 +00001081PHONY += $(clean-dirs) clean archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082$(clean-dirs):
1083 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1084
Pawel Mollbd1ee802012-10-29 11:23:02 +00001085vmlinuxclean:
1086 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1087
1088clean: archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089
1090# mrproper - Delete all generated files, including .config
1091#
1092mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1093mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1094mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1095
Paul Smith4f193362006-03-05 17:14:10 -05001096PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097$(mrproper-dirs):
1098 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1099
1100mrproper: clean archmrproper $(mrproper-dirs)
1101 $(call cmd,rmdirs)
1102 $(call cmd,rmfiles)
1103
1104# distclean
1105#
Paul Smith4f193362006-03-05 17:14:10 -05001106PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107
1108distclean: mrproper
1109 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001110 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
Michal Marekf4b129f2011-08-10 13:10:20 +02001112 -o -name '.*.rej' \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1114 -type f -print | xargs rm -f
1115
1116
1117# Packaging of the kernel to various formats
1118# ---------------------------------------------------------------------------
1119# rpm target kept for backward compatibility
1120package-dir := $(srctree)/scripts/package
1121
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001122%src-pkg: FORCE
1123 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001124%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001125 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001126rpm: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001127 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128
1129
1130# Brief documentation of the typical targets used
1131# ---------------------------------------------------------------------------
1132
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001133boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134boards := $(notdir $(boards))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001135board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1136board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137
1138help:
1139 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001140 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001141 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001142 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001143 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 @echo ''
1145 @echo 'Configuration targets:'
1146 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1147 @echo ''
1148 @echo 'Other generic targets:'
1149 @echo ' all - Build all targets marked with [*]'
1150 @echo '* vmlinux - Build the bare kernel'
1151 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001152 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
David Woodhouse88ecf812008-05-29 11:01:51 +03001153 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1154 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 @echo ' dir/ - Build all files in dir and below'
Joe Perches62718972010-01-13 09:31:44 -08001156 @echo ' dir/file.[oisS] - Build specified target only'
1157 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1158 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001159 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001160 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 @echo ' tags/TAGS - Generate tags file for editors'
1162 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001163 @echo ' gtags - Generate GNU GLOBAL index'
Zach Brown6d128842005-09-07 12:08:23 -07001164 @echo ' kernelrelease - Output the release version string'
Sam Ravnborgcb584552006-01-09 21:20:34 +01001165 @echo ' kernelversion - Output the version stored in Makefile'
Mike Marciniszync398ff02013-06-24 08:48:37 -04001166 @echo ' image_name - Output the image name'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001167 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001168 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001169 echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 @echo 'Static analysers'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 @echo ' checkstack - Generate a list of stack hogs'
1172 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001173 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001174 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001175 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001176 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001177 @echo ' headerdep - Detect inclusion cycles in headers'
1178 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1179 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001181 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 @echo ''
1183 @echo 'Documentation targets:'
1184 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1185 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001186 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001188 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 @echo ''
1190 @$(if $(boards), \
1191 $(foreach b, $(boards), \
1192 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1193 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001194 @$(if $(board-dirs), \
1195 $(foreach b, $(board-dirs), \
1196 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1197 printf " %-16s - Show all of the above\\n" help-boards; \
1198 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199
1200 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001201 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001203 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1204 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001205 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001206 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1207 @echo ' 1: warnings which may be relevant and do not occur too often'
1208 @echo ' 2: warnings which occur quite often but may still be relevant'
1209 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001210 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 @echo ''
1212 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1213 @echo 'For further info see the ./README file'
1214
1215
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001216help-board-dirs := $(addprefix help-,$(board-dirs))
1217
1218help-boards: $(help-board-dirs)
1219
1220boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1221
1222$(help-board-dirs): help-%:
1223 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1224 @$(if $(boards-per-dir), \
1225 $(foreach b, $(boards-per-dir), \
1226 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1227 echo '')
1228
1229
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230# Documentation targets
1231# ---------------------------------------------------------------------------
1232%docs: scripts_basic FORCE
Peter Foleybffd2022011-05-02 22:48:03 +02001233 $(Q)$(MAKE) $(build)=scripts build_docproc
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1235
1236else # KBUILD_EXTMOD
1237
1238###
1239# External module support.
1240# When building external modules the kernel used as basis is considered
1241# read-only, and no consistency checks are made and the make
1242# system is not used on the basis kernel. If updates are required
1243# in the basis kernel ordinary make commands (without M=...) must
1244# be used.
1245#
1246# The following are the only valid targets when building external
1247# modules.
1248# make M=dir clean Delete all automatically generated files
1249# make M=dir modules Make all modules in specified dir
1250# make M=dir Same as 'make M=dir modules'
1251# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001252# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253# Assumes install directory is already created
1254
1255# We are always building modules
1256KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001257PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001259 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
Paul Smith4f193362006-03-05 17:14:10 -05001261PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262$(objtree)/Module.symvers:
1263 @test -e $(objtree)/Module.symvers || ( \
1264 echo; \
1265 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1266 echo " is missing; modules will have no dependencies and modversions."; \
1267 echo )
1268
1269module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001270PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271$(module-dirs): crmodverdir $(objtree)/Module.symvers
1272 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1273
1274modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001275 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001276 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277
Paul Smith4f193362006-03-05 17:14:10 -05001278PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001279modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001280
Paul Smith4f193362006-03-05 17:14:10 -05001281install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1282PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001283_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001284 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001285 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286
Paul Smith4f193362006-03-05 17:14:10 -05001287PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001288_emodinst_post: _emodinst_
1289 $(call cmd,depmod)
1290
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1292
Paul Smith4f193362006-03-05 17:14:10 -05001293PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294$(clean-dirs):
1295 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1296
1297clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001298clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299
1300help:
1301 @echo ' Building external modules.'
1302 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1303 @echo ''
1304 @echo ' modules - default target, build the module(s)'
1305 @echo ' modules_install - install the module'
1306 @echo ' clean - remove generated files in module directory only'
1307 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001308
1309# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001310PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001311prepare: ;
1312scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313endif # KBUILD_EXTMOD
1314
Michal Marek88d7be02010-09-06 12:00:08 +02001315clean: $(clean-dirs)
1316 $(call cmd,rmdirs)
1317 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001318 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Michal Marek88d7be02010-09-06 12:00:08 +02001319 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
David Howellsaddbcdb2012-09-26 10:09:50 +01001320 -o -name '*.ko.*' \
Michal Marek88d7be02010-09-06 12:00:08 +02001321 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1322 -o -name '*.symtypes' -o -name 'modules.order' \
1323 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1324 -o -name '*.gcno' \) -type f -print | xargs rm -f
1325
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326# Generate tags for editors
1327# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001328quiet_cmd_tags = GEN $@
1329 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001331tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 $(call cmd,tags)
1333
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334# Scripts to check various things for consistency
1335# ---------------------------------------------------------------------------
1336
Peter Foley279f3dd2011-04-26 17:15:01 -04001337PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1338
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001340 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001342 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343
1344versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001345 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001347 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
Nicolas Palix74425ee2010-06-06 17:15:01 +02001349coccicheck:
1350 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1351
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352namespacecheck:
1353 $(PERL) $(srctree)/scripts/namespace.pl
1354
Adrian Bunk295ac052007-08-24 23:04:56 +02001355export_report:
1356 $(PERL) $(srctree)/scripts/export_report.pl
1357
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358endif #ifeq ($(config-targets),1)
1359endif #ifeq ($(mixed-targets),1)
1360
Mike Marciniszync398ff02013-06-24 08:48:37 -04001361PHONY += checkstack kernelrelease kernelversion image_name
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001362
Jeff Dike011e3a92006-12-13 00:34:12 -08001363# UML needs a little special treatment here. It wants to use the host
1364# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1365# else wants $(ARCH), including people doing cross-builds, which means
1366# that $(SUBARCH) doesn't work here.
1367ifeq ($(ARCH), um)
1368CHECKSTACK_ARCH := $(SUBARCH)
1369else
1370CHECKSTACK_ARCH := $(ARCH)
1371endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372checkstack:
1373 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001374 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001376kernelrelease:
1377 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001378
Sam Ravnborgcb584552006-01-09 21:20:34 +01001379kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001380 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381
Mike Marciniszync398ff02013-06-24 08:48:37 -04001382image_name:
1383 @echo $(KBUILD_IMAGE)
1384
Borislav Petkovea01fa92012-04-11 18:36:18 +02001385# Clear a bunch of variables before executing the submake
1386tools/: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001387 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001388 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
Borislav Petkovea01fa92012-04-11 18:36:18 +02001389
1390tools/%: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001391 $(Q)mkdir -p $(objtree)/tools
Borislav Petkova50e4332013-02-20 16:32:28 +01001392 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
Borislav Petkovea01fa92012-04-11 18:36:18 +02001393
Sam Ravnborg06300b22006-01-25 07:13:18 +01001394# Single targets
1395# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001396# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001397# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001398# - build with separate output dir 'make O=...'
1399# - external modules
1400#
1401# target-dir => where to store outputfile
1402# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001403
Sam Ravnborg06300b22006-01-25 07:13:18 +01001404ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001405 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001406 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001407else
1408 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001409 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1410 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001411endif
1412
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001413%.s: %.c prepare scripts FORCE
1414 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1415%.i: %.c prepare scripts FORCE
1416 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1417%.o: %.c prepare scripts FORCE
1418 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1419%.lst: %.c prepare scripts FORCE
1420 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1421%.s: %.S prepare scripts FORCE
1422 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1423%.o: %.S prepare scripts FORCE
1424 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001425%.symtypes: %.c prepare scripts FORCE
1426 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001427
1428# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001429/: prepare scripts FORCE
1430 $(cmd_crmodverdir)
1431 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1432 $(build)=$(build-dir)
1433%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001434 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001435 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001436 $(build)=$(build-dir)
1437%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001438 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001439 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001440 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001441 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001442
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443# FIXME Should go into a make.lib or something
1444# ===========================================================================
1445
1446quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1447 cmd_rmdirs = rm -rf $(rm-dirs)
1448
1449quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1450 cmd_rmfiles = rm -f $(rm-files)
1451
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001452# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001453quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001454 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
Rusty Russellb92021b2013-03-15 15:04:17 +10301455 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001456
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001457# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001458# clean it up only when building all modules
1459cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1460 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462# read all saved command lines
1463
1464targets := $(wildcard $(sort $(targets)))
1465cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1466
1467ifneq ($(cmd_files),)
1468 $(cmd_files): ; # Do not try to update included dependency files
1469 include $(cmd_files)
1470endif
1471
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1473# Usage:
1474# $(Q)$(MAKE) $(clean)=dir
1475clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1476
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477endif # skip-makefile
1478
Paul Smith4f193362006-03-05 17:14:10 -05001479PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001481
Paul Smith4f193362006-03-05 17:14:10 -05001482# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001483# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001484.PHONY: $(PHONY)