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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001# SPDX-License-Identifier: GPL-2.0
Linus Torvaldsc517d832015-02-22 18:21:14 -08002VERSION = 4
Linus Torvalds60cc43f2018-04-15 18:24:20 -07003PATCHLEVEL = 17
Linus Torvalds55922c92011-05-29 17:43:36 -07004SUBLEVEL = 0
Linus Torvalds75bc37f2018-05-06 16:57:38 -10005EXTRAVERSION = -rc4
6NAME = Merciless Moray
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
8# *DOCUMENTATION*
9# To see a list of typical targets execute "make help"
10# More info can be located in ./README
11# Comments in this file are targeted only to the developer, do not
12# expect to learn how to build the kernel reading this file.
13
Masahiro Yamadaba634ec2017-10-04 12:56:05 +090014# That's our default target when none is given on the command line
15PHONY := _all
16_all:
17
Masahiro Yamadaa436bb72015-03-27 20:43:36 +090018# o Do not use make's built-in rules and variables
19# (this increases performance and avoids hard-to-debug behaviour);
20# o Look for make include files relative to root of kernel src
21MAKEFLAGS += -rR --include-dir=$(CURDIR)
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
H. Peter Anvinc0513462009-12-17 06:56:11 -080023# Avoid funny character set dependencies
H. Peter Anvin06b5dc62009-12-17 15:51:37 -080024unexport LC_ALL
H. Peter Anvinc0513462009-12-17 06:56:11 -080025LC_COLLATE=C
26LC_NUMERIC=C
Michal Marek07105202010-01-08 12:25:37 +010027export LC_COLLATE LC_NUMERIC
H. Peter Anvinc0513462009-12-17 06:56:11 -080028
Borislav Petkovab7474e2013-11-11 15:27:43 +010029# Avoid interference with shell env settings
30unexport GREP_OPTIONS
31
Linus Torvalds1da177e2005-04-16 15:20:36 -070032# We are using a recursive build, so we need to do a little thinking
33# to get the ordering right.
34#
35# Most importantly: sub-Makefiles should only ever modify files in
36# their own directory. If in some directory we have a dependency on
37# a file in another dir (which doesn't happen often, but it's often
Nicholas Pigginf49821e2018-02-11 00:25:04 +100038# unavoidable when linking the built-in.a targets which finally
Linus Torvalds1da177e2005-04-16 15:20:36 -070039# turn into vmlinux), we will call a sub make in that other dir, and
40# after that we are sure that everything which is in that other dir
41# is now up to date.
42#
43# The only cases where we need to modify files which have global
44# effects are thus separated out and done before the recursive
45# descending is started. They are now explicitly listed as the
46# prepare rule.
47
Michal Marek066b7ed2014-07-04 14:29:30 +020048# Beautify output
49# ---------------------------------------------------------------------------
50#
51# Normally, we echo the whole command before executing it. By making
52# that echo $($(quiet)$(cmd)), we now have the possibility to set
53# $(quiet) to choose other forms of output instead, e.g.
54#
55# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
56# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
57#
58# If $(quiet) is empty, the whole command will be printed.
59# If it is set to "quiet_", only the short version will be printed.
60# If it is set to "silent_", nothing will be printed at all, since
61# the variable $(silent_cmd_cc_o_c) doesn't exist.
62#
63# A simple variant is to prefix commands with $(Q) - that's useful
64# for commands that shall be hidden in non-verbose mode.
65#
66# $(Q)ln $@ :<
67#
68# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
69# If KBUILD_VERBOSE equals 1 then the above command is displayed.
70#
Linus Torvalds1da177e2005-04-16 15:20:36 -070071# To put more focus on warnings, be less verbose as default
72# Use 'make V=1' to see the full commands
73
Cheng Renquanb8b06182009-05-26 16:03:07 +080074ifeq ("$(origin V)", "command line")
75 KBUILD_VERBOSE = $(V)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076endif
77ifndef KBUILD_VERBOSE
78 KBUILD_VERBOSE = 0
79endif
80
Michal Marek066b7ed2014-07-04 14:29:30 +020081ifeq ($(KBUILD_VERBOSE),1)
82 quiet =
83 Q =
84else
85 quiet=quiet_
86 Q = @
87endif
88
89# If the user is running make -s (silent mode), suppress echoing of
90# commands
91
Masahiro Yamada6f0fa582017-05-19 20:42:30 +090092ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
Michal Marek066b7ed2014-07-04 14:29:30 +020093 quiet=silent_
Josh Poimboeufe572d082017-01-18 22:16:55 -060094 tools_silent=s
Michal Marek066b7ed2014-07-04 14:29:30 +020095endif
Michal Marek066b7ed2014-07-04 14:29:30 +020096
97export quiet Q KBUILD_VERBOSE
98
Linus Torvalds1da177e2005-04-16 15:20:36 -070099# kbuild supports saving output files in a separate directory.
100# To locate output files in a separate directory two syntaxes are supported.
101# In both cases the working directory must be the root of the kernel src.
102# 1) O=
103# Use "make O=dir/to/store/output/files/"
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200104#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105# 2) Set KBUILD_OUTPUT
106# Set the environment variable KBUILD_OUTPUT to point to the directory
107# where the output files shall be placed.
108# export KBUILD_OUTPUT=dir/to/store/output/files/
109# make
110#
111# The O= assignment takes precedence over the KBUILD_OUTPUT environment
112# variable.
113
Cao jinc4e6fff2017-06-30 10:45:43 +0800114# KBUILD_SRC is not intended to be used by the regular user (for now),
115# it is set on invocation of make with KBUILD_OUTPUT or O= specified.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116ifeq ($(KBUILD_SRC),)
117
118# OK, Make called in directory where kernel src resides
119# Do we want to locate output files in a separate directory?
Cheng Renquanb8b06182009-05-26 16:03:07 +0800120ifeq ("$(origin O)", "command line")
121 KBUILD_OUTPUT := $(O)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122endif
123
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100124# Cancel implicit rules on top Makefile
125$(CURDIR)/Makefile Makefile: ;
126
Robert Jarzmik51193b72016-04-02 21:38:53 +0200127ifneq ($(words $(subst :, ,$(CURDIR))), 1)
128 $(error main directory cannot contain spaces nor colons)
129endif
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131ifneq ($(KBUILD_OUTPUT),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132# check that the output directory actually exists
133saved-output := $(KBUILD_OUTPUT)
Masahiro Yamada028568d2017-10-02 17:07:28 +0900134KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
Bjørn Forsman16f82592017-11-05 10:44:16 +0100135 && pwd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136$(if $(KBUILD_OUTPUT),, \
Masahiro Yamada1c9e70a2014-03-31 16:41:36 +0900137 $(error failed to create output directory "$(saved-output)"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Milton Miller0b357862007-09-21 18:09:02 -0500139PHONY += $(MAKECMDGOALS) sub-make
140
Sam Ravnborg1cacc9a2007-12-06 22:20:11 +0100141$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
Charles Keepax16f89092012-10-15 13:49:12 +0100142 @:
Milton Miller0b357862007-09-21 18:09:02 -0500143
Cao jinc4e6fff2017-06-30 10:45:43 +0800144# Invoke a second make in the output directory, passing relevant variables
Masahiro Yamada2e8d6962016-03-13 09:13:55 +0900145sub-make:
Masahiro Yamada745a2542014-09-09 20:02:23 +0900146 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
Masahiro Yamadaaa55c8e2014-09-09 20:02:24 +0900147 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
149# Leave processing to above invocation of make
150skip-makefile := 1
151endif # ifneq ($(KBUILD_OUTPUT),)
152endif # ifeq ($(KBUILD_SRC),)
153
154# We process the rest of the Makefile if this is the final invocation of make
155ifeq ($(skip-makefile),)
156
Masahiro Yamada7ff52572014-09-09 20:02:22 +0900157# Do not print "Entering directory ...",
158# but we want to display it when entering to the output directory
159# so that IDEs/editors are able to understand relative filenames.
160MAKEFLAGS += --no-print-directory
161
Masahiro Yamadaaa55c8e2014-09-09 20:02:24 +0900162# Call a source code checker (by default, "sparse") as part of the
163# C compilation.
164#
165# Use 'make C=1' to enable checking of only re-compiled files.
166# Use 'make C=2' to enable checking of *all* source files, regardless
167# of whether they are re-compiled or not.
168#
Cao jin036db112017-03-24 17:03:17 +0800169# See the file "Documentation/dev-tools/sparse.rst" for more details,
170# including where to get the "sparse" utility.
Masahiro Yamadaaa55c8e2014-09-09 20:02:24 +0900171
172ifeq ("$(origin C)", "command line")
173 KBUILD_CHECKSRC = $(C)
174endif
175ifndef KBUILD_CHECKSRC
176 KBUILD_CHECKSRC = 0
177endif
178
179# Use make M=dir to specify directory of external module to build
180# Old syntax make ... SUBDIRS=$PWD is still supported
181# Setting the environment variable KBUILD_EXTMOD take precedence
182ifdef SUBDIRS
183 KBUILD_EXTMOD ?= $(SUBDIRS)
184endif
185
186ifeq ("$(origin M)", "command line")
187 KBUILD_EXTMOD := $(M)
188endif
189
Michal Marek9da07632014-04-25 23:25:18 +0200190ifeq ($(KBUILD_SRC),)
191 # building in the source tree
192 srctree := .
193else
194 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
195 # building in a subdirectory of the source tree
196 srctree := ..
197 else
198 srctree := $(KBUILD_SRC)
199 endif
200endif
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900201
202export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
203
Michal Marek7e1c0472014-04-25 17:29:45 +0200204objtree := .
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205src := $(srctree)
206obj := $(objtree)
207
Mattia Dongili0f558c32006-02-19 13:50:37 +0100208VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
Amerigo Wang11294232009-06-19 03:40:26 -0400210export srctree objtree VPATH
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900212# To make sure we do not include .config for any of the *config targets
213# catch them early, and hand them over to scripts/kconfig/Makefile
214# It is allowed to specify more targets when calling make, including
215# mixing *config targets and build targets.
216# For example 'make oldconfig all'.
217# Detect when mixed targets is specified, and make a second invocation
218# of make so .config is not included in this case either (for *config).
219
220version_h := include/generated/uapi/linux/version.h
221old_version_h := include/linux/version.h
222
Masahiro Yamada22340a02018-02-11 17:40:29 +0900223clean-targets := %clean mrproper cleandocs
224no-dot-config-targets := $(clean-targets) \
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900225 cscope gtags TAGS tags help% %docs check% coccicheck \
226 $(version_h) headers_% archheaders archscripts \
227 kernelversion %src-pkg
228
229config-targets := 0
230mixed-targets := 0
231dot-config := 1
232
233ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
234 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
235 dot-config := 0
236 endif
237endif
238
239ifeq ($(KBUILD_EXTMOD),)
240 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
241 config-targets := 1
242 ifneq ($(words $(MAKECMDGOALS)),1)
243 mixed-targets := 1
244 endif
245 endif
246endif
Masahiro Yamada22340a02018-02-11 17:40:29 +0900247
248# For "make -j clean all", "make -j mrproper defconfig all", etc.
249ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
250 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
251 mixed-targets := 1
252 endif
253endif
254
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900255# install and modules_install need also be processed one by one
256ifneq ($(filter install,$(MAKECMDGOALS)),)
257 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
258 mixed-targets := 1
259 endif
260endif
261
262ifeq ($(mixed-targets),1)
263# ===========================================================================
264# We're called with mixed targets (*config and build targets).
265# Handle them one by one.
266
267PHONY += $(MAKECMDGOALS) __build_one_by_one
268
269$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
270 @:
271
272__build_one_by_one:
273 $(Q)set -e; \
274 for i in $(MAKECMDGOALS); do \
275 $(MAKE) -f $(srctree)/Makefile $$i; \
276 done
277
278else
279
280# We need some generic definitions (do not try to remake the file).
281scripts/Kbuild.include: ;
282include scripts/Kbuild.include
283
284# Read KERNELRELEASE from include/config/kernel.release (if it exists)
285KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
286KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
287export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289# SUBARCH tells the usermode build what the underlying arch is. That is set
290# first, and if a usermode build is happening, the "ARCH=um" on the command
291# line overrides the setting of ARCH below. If a native build is happening,
Masahiro Yamada38385f82014-04-28 16:26:18 +0900292# then ARCH is assigned, getting whatever value it gets normally, and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293# SUBARCH is subsequently ignored.
294
David Woodhouseffee0de2012-12-20 21:51:55 +0000295SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
296 -e s/sun4u/sparc64/ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 -e s/arm.*/arm/ -e s/sa110/arm/ \
Linus Torvalds39990b52005-11-11 14:27:32 -0800298 -e s/s390x/s390/ -e s/parisc64/parisc/ \
Paul Mundt236b1952007-11-02 12:22:47 +0900299 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
Palmer Dabbeltfbe934d2017-07-10 18:08:08 -0700300 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
301 -e s/riscv.*/riscv/)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
303# Cross compiling and selecting different set of gcc/bin-utils
304# ---------------------------------------------------------------------------
305#
306# When performing cross compilation for other architectures ARCH shall be set
307# to the target architecture. (See arch/* for the possibilities).
308# ARCH can be set during invocation of make:
309# make ARCH=ia64
310# Another way is to have ARCH set in the environment.
311# The default ARCH is the host where make is executed.
312
313# CROSS_COMPILE specify the prefix used for all executables used
314# during compilation. Only gcc and related bin-utils executables
315# are prefixed with $(CROSS_COMPILE).
316# CROSS_COMPILE can be set on the command line
317# make CROSS_COMPILE=ia64-linux-
318# Alternatively CROSS_COMPILE can be set in the environment.
Roland McGrath84336462009-12-21 16:24:06 -0800319# A third alternative is to store a setting in .config so that plain
320# "make" in the configured kernel build directory always uses that.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321# Default value for CROSS_COMPILE is not to prefix executables
322# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200323ARCH ?= $(SUBARCH)
Roland McGrath84336462009-12-21 16:24:06 -0800324CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
326# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200327UTS_MACHINE := $(ARCH)
328SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
Sam Ravnborgd746d642007-11-12 20:14:19 +0100330# Additional ARCH settings for x86
331ifeq ($(ARCH),i386)
332 SRCARCH := x86
333endif
334ifeq ($(ARCH),x86_64)
335 SRCARCH := x86
336endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200337
Sam Ravnborg5e538792008-12-02 23:17:12 -0800338# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000339ifeq ($(ARCH),sparc32)
340 SRCARCH := sparc
341endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200342ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800343 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200344endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200345
Paul Mundt3cc000b2009-04-11 08:39:27 +0900346# Additional ARCH settings for sh
347ifeq ($(ARCH),sh64)
348 SRCARCH := sh
349endif
350
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700351KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500352export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700353
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354# SHELL used by kbuild
355CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
356 else if [ -x /bin/bash ]; then echo /bin/bash; \
357 else echo sh; fi ; fi)
358
Uwe Kleine-Königd7f14c62017-07-09 20:02:36 +0200359HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS)
360HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS)
361HOST_LFS_LIBS := $(shell getconf LFS_LIBS)
362
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200363HOSTCC = gcc
364HOSTCXX = g++
Uwe Kleine-Königd7f14c62017-07-09 20:02:36 +0200365HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
366 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
367HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
368HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
369HOST_LOADLIBES := $(HOST_LFS_LIBS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371# Make variables (CC, etc...)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372AS = $(CROSS_COMPILE)as
373LD = $(CROSS_COMPILE)ld
374CC = $(CROSS_COMPILE)gcc
375CPP = $(CC) -E
376AR = $(CROSS_COMPILE)ar
377NM = $(CROSS_COMPILE)nm
378STRIP = $(CROSS_COMPILE)strip
379OBJCOPY = $(CROSS_COMPILE)objcopy
380OBJDUMP = $(CROSS_COMPILE)objdump
Masahiro Yamada73a4f6d2017-12-10 01:02:28 +0900381LEX = flex
382YACC = bison
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383AWK = awk
384GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200385INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386DEPMOD = /sbin/depmod
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387PERL = perl
Masahiro Yamada011bf122014-07-18 13:40:11 +0900388PYTHON = python
Masahiro Yamadae9781b52018-03-13 18:12:02 +0900389PYTHON2 = python2
390PYTHON3 = python3
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391CHECK = sparse
392
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100393CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
Luc Van Oostenryck6c49f352018-02-15 22:07:50 +0100394 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
Michal Marekb36fad62016-06-07 11:57:02 +0200395NOSTDINC_FLAGS =
Sam Ravnborg65881692010-07-28 17:33:09 +0200396CFLAGS_MODULE =
397AFLAGS_MODULE =
398LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399CFLAGS_KERNEL =
400AFLAGS_KERNEL =
Michal Marekb36fad62016-06-07 11:57:02 +0200401LDFLAGS_vmlinux =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
David Howellsabbf1592012-10-02 18:01:26 +0100403# Use USERINCLUDE when you must reference the UAPI directories only.
404USERINCLUDE := \
Masahiro Yamada9d022c52017-10-04 12:56:04 +0900405 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
406 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
David Howellsabbf1592012-10-02 18:01:26 +0100407 -I$(srctree)/include/uapi \
Arnd Bergmann3308b282016-06-15 17:45:45 +0200408 -I$(objtree)/include/generated/uapi \
David Howellsabbf1592012-10-02 18:01:26 +0100409 -include $(srctree)/include/linux/kconfig.h
410
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411# Use LINUXINCLUDE when you must reference the include/ directory.
412# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100413LINUXINCLUDE := \
Masahiro Yamada9d022c52017-10-04 12:56:04 +0900414 -I$(srctree)/arch/$(SRCARCH)/include \
415 -I$(objtree)/arch/$(SRCARCH)/include/generated \
David Howellsabbf1592012-10-02 18:01:26 +0100416 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Masahiro Yamadaf8224f72017-06-06 16:15:28 +0900417 -I$(objtree)/include \
418 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Masahiro Yamada433dc2e2017-10-12 18:22:25 +0900420KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200421KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Arnd Bergmann8c970232017-07-26 15:36:23 +0200422 -fno-strict-aliasing -fno-common -fshort-wchar \
Floris Kraaka8735822009-06-15 08:54:02 +0300423 -Werror-implicit-function-declaration \
Kirill A. Shutemov51b97e32014-10-20 12:23:12 +0300424 -Wno-format-security \
Masahiro Yamada433dc2e2017-10-12 18:22:25 +0900425 -std=gnu89
426KBUILD_CPPFLAGS := -D__KERNEL__
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200427KBUILD_AFLAGS_KERNEL :=
428KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg65881692010-07-28 17:33:09 +0200429KBUILD_AFLAGS_MODULE := -DMODULE
430KBUILD_CFLAGS_MODULE := -DMODULE
431KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Masahiro Yamadace99d0b2018-03-16 16:37:09 +0900432LDFLAGS :=
Masahiro Yamada433dc2e2017-10-12 18:22:25 +0900433GCC_PLUGINS_CFLAGS :=
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
Sam Ravnborg80ef88d2007-11-17 15:37:31 +0100435export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
Uwe Kleine-Königd7f14c62017-07-09 20:02:36 +0200436export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
Masahiro Yamadae9781b52018-03-13 18:12:02 +0900437export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200438export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Sam Ravnborg06c50402007-10-15 22:17:25 +0200440export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
Andrey Konovalov0e410e12018-02-06 15:36:00 -0800441export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
442export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
Sam Ravnborg222d3942007-10-15 21:59:31 +0200443export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
Sam Ravnborg65881692010-07-28 17:33:09 +0200444export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200445export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
Michal Marek40df7592011-04-20 13:45:30 +0200446export KBUILD_ARFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
448# When compiling out-of-tree modules, put MODVERDIR in the module
449# tree rather than in the kernel tree. The kernel tree might
450# even be read-only.
451export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
452
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453# Files to ignore in find ... statements
454
Prarit Bhargavaae63b2d2014-02-06 07:51:42 -0500455export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
456 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
457 -prune -o
Jesper Juhl450c6072012-02-16 22:49:15 +0100458export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
459 --exclude CVS --exclude .pc --exclude .hg --exclude .git
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
461# ===========================================================================
462# Rules shared between *config targets and build targets
463
Cao jin312a3d02017-08-02 10:31:06 +0800464# Basic helpers built in scripts/basic/
Paul Smith4f193362006-03-05 17:14:10 -0500465PHONY += scripts_basic
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466scripts_basic:
467 $(Q)$(MAKE) $(build)=scripts/basic
Steven Rostedt638adb02009-11-17 10:48:25 -0500468 $(Q)rm -f .tmp_quiet_recordmcount
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
Jan Beulichcd05e6b2005-09-06 11:47:04 +0200470# To avoid any implicit rule to kick in, define an empty command.
471scripts/basic/%: scripts_basic ;
472
Paul Smith4f193362006-03-05 17:14:10 -0500473PHONY += outputmakefile
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200474# outputmakefile generates a Makefile in the output directory, if using a
475# separate output directory. This allows convenient use of make in the
476# output directory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477outputmakefile:
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200478ifneq ($(KBUILD_SRC),)
Andi Kleen92979992009-01-10 04:56:13 +0100479 $(Q)ln -fsn $(srctree) source
Jan Beulichfd5f0cd2006-05-02 12:33:20 +0200480 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
481 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
482endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483
Chris Friesae6b2892017-11-07 11:46:13 -0800484ifeq ($(cc-name),clang)
485ifneq ($(CROSS_COMPILE),)
486CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%))
487GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..)
488endif
489ifneq ($(GCC_TOOLCHAIN),)
490CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN)
491endif
492KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
493KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
Stefan Agner0f0e8de2018-03-19 22:12:53 +0100494KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
495KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
Chris Friesae6b2892017-11-07 11:46:13 -0800496endif
497
Peter Zijlstrad5028ba2018-02-06 09:46:13 +0100498RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
499RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
500RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
501export RETPOLINE_CFLAGS
502
Peter Zijlstrae501ce92018-01-17 11:42:07 +0100503# check for 'asm goto'
504ifeq ($(call shell-cached,$(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
505 CC_HAVE_ASM_GOTO := 1
506 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
507 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
508endif
509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510ifeq ($(config-targets),1)
511# ===========================================================================
512# *config targets only - make sure prerequisites are updated, and descend
513# in scripts/kconfig to make the *config target
514
515# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
516# KBUILD_DEFCONFIG may point out an alternative default configuration
517# used for 'make defconfig'
Masahiro Yamadaa436bb72015-03-27 20:43:36 +0900518include arch/$(SRCARCH)/Makefile
Al Viro61bee202008-08-25 04:51:27 -0400519export KBUILD_DEFCONFIG KBUILD_KCONFIG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100521config: scripts_basic outputmakefile FORCE
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100522 $(Q)$(MAKE) $(build)=scripts/kconfig $@
523
524%config: scripts_basic outputmakefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 $(Q)$(MAKE) $(build)=scripts/kconfig $@
526
527else
528# ===========================================================================
529# Build targets only - this includes vmlinux, arch specific targets, clean
530# targets and others. In general all targets except *config targets.
531
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900532# If building an external module we do not care about the all: rule
533# but instead _all depend on modules
534PHONY += all
535ifeq ($(KBUILD_EXTMOD),)
536_all: all
537else
538_all: modules
539endif
540
541# Decide whether to build built-in, modular, or both.
542# Normally, just do built-in.
543
544KBUILD_MODULES :=
545KBUILD_BUILTIN := 1
546
547# If we have only "make modules", don't compile built-in objects.
548# When we're building modules with modversions, we need to consider
549# the built-in objects during the descend as well, in order to
550# make sure the checksums are up to date before we record them.
551
552ifeq ($(MAKECMDGOALS),modules)
553 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
554endif
555
556# If we have "make <whatever> modules", compile modules
557# in addition to whatever we do anyway.
558# Just "make" or "make all" shall build modules as well
559
560ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
561 KBUILD_MODULES := 1
562endif
563
564ifeq ($(MAKECMDGOALS),)
565 KBUILD_MODULES := 1
566endif
567
568export KBUILD_MODULES KBUILD_BUILTIN
569
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571# Objects we will link into vmlinux / subdirs we need to visit
572init-y := init/
Markus Trippelsdorfdf85b2d2017-09-16 11:01:16 +0200573drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574net-y := net/
575libs-y := lib/
576core-y := usr/
Feng Wu37d9fe42015-09-22 16:47:29 +0800577virt-y := virt/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578endif # KBUILD_EXTMOD
579
580ifeq ($(dot-config),1)
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200581# Read in config
582-include include/config/auto.conf
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200584ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585# Read in dependencies to all Kconfig* files, make sure to run
586# oldconfig if changes are detected.
Roman Zippelc955cca2006-06-08 22:12:39 -0700587-include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589# To avoid any implicit rule to kick in, define an empty command
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700590$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Ulf Magnusson61277982018-02-13 08:58:20 +0100592# The actual configuration files used during the build are stored in
593# include/generated/ and include/config/. Update them if .config is newer than
594# include/config/auto.conf (which mirrors .config).
Michal Marekbc081dd2009-12-07 16:38:33 +0100595include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
Masahiro Yamada911a91c2018-03-01 15:34:37 +0900596 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597else
Sam Ravnborg264a2682009-10-18 00:49:24 +0200598# external modules needs include/generated/autoconf.h and include/config/auto.conf
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200599# but do not care if they are up-to-date. Use auto.conf to trigger the test
600PHONY += include/config/auto.conf
601
602include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200603 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200604 echo >&2; \
605 echo >&2 " ERROR: Kernel configuration is invalid."; \
606 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
607 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
608 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200609 /bin/false)
610
611endif # KBUILD_EXTMOD
Roman Zippelc955cca2006-06-08 22:12:39 -0700612
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613else
614# Dummy target needed, because used as prerequisite
Roman Zippelc955cca2006-06-08 22:12:39 -0700615include/config/auto.conf: ;
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200616endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
618# The all: target is the default when no target is given on the
619# command line.
620# This allow a user to issue only 'make' to build a kernel including modules
Michal Marekc8447162010-06-03 10:54:58 +0200621# Defaults to vmlinux, but the arch makefile usually adds further targets
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622all: vmlinux
623
Masahiro Yamada433dc2e2017-10-12 18:22:25 +0900624KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
625KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
626CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
Masahiro Yamada433dc2e2017-10-12 18:22:25 +0900627export CFLAGS_GCOV CFLAGS_KCOV
628
Michal Marek6dd3f132015-07-16 18:23:53 +0200629# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
630# values of the respective KBUILD_* variables
631ARCH_CPPFLAGS :=
632ARCH_AFLAGS :=
633ARCH_CFLAGS :=
Masahiro Yamadaa436bb72015-03-27 20:43:36 +0900634include arch/$(SRCARCH)/Makefile
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200635
636KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
Linus Torvaldsef6000b2016-10-12 10:23:41 -0700637KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
Linus Torvaldsbd664f62017-07-12 19:25:47 -0700638KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
639KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
640KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200641
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Behan Webster6748cb32017-03-27 18:19:09 -0700643KBUILD_CFLAGS += $(call cc-option,-Oz,-Os)
644KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645else
Arnd Bergmann815eb712016-04-25 17:35:28 +0200646ifdef CONFIG_PROFILE_ALL_BRANCHES
Arnd Bergmanna76bcf52016-11-10 17:44:44 +0100647KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
Arnd Bergmann815eb712016-04-25 17:35:28 +0200648else
649KBUILD_CFLAGS += -O2
650endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651endif
652
Arnd Bergmanna76bcf52016-11-10 17:44:44 +0100653KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
654 $(call cc-disable-warning,maybe-uninitialized,))
655
Jiri Kosina69102312014-08-06 16:08:43 -0700656# Tell gcc to never replace conditional load with a non-conditional one
657KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
658
Victor Chibotarud677a4d2017-11-17 15:30:50 -0800659include scripts/Makefile.kcov
Emese Revfy6b90bd42016-05-24 00:09:38 +0200660include scripts/Makefile.gcc-plugins
661
Andi Kleen1873e872012-03-28 11:51:18 -0700662ifdef CONFIG_READABLE_ASM
663# Disable optimizations that make assembler listings hard to read.
664# reorder blocks reorders the control in the function
665# ipa clone creates specialized cloned functions
666# partial inlining inlines only parts of functions
667KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
668 $(call cc-option,-fno-ipa-cp-clone,) \
669 $(call cc-option,-fno-partial-inlining)
670endif
671
Mike Frysinger08f67462009-06-04 16:29:08 -0700672ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100673KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
674endif
675
Kees Cookc965b102016-07-26 15:21:17 -0700676# This selects the stack protector compiler flag. Testing it is delayed
677# until after .config has been reprocessed, in the prepare-compiler-check
678# target.
Kees Cook44c6dc92018-02-06 15:37:45 -0800679ifdef CONFIG_CC_STACKPROTECTOR_AUTO
680 stackp-flag := $(call cc-option,-fstack-protector-strong,$(call cc-option,-fstack-protector))
681 stackp-name := AUTO
682else
Kees Cook87796572013-12-19 11:35:59 -0800683ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
Kees Cook19952a92013-12-19 11:35:58 -0800684 stackp-flag := -fstack-protector
Kees Cookc965b102016-07-26 15:21:17 -0700685 stackp-name := REGULAR
Jan Beulich6c15b322014-02-25 15:01:48 -0800686else
687ifdef CONFIG_CC_STACKPROTECTOR_STRONG
Kees Cook87796572013-12-19 11:35:59 -0800688 stackp-flag := -fstack-protector-strong
Kees Cookc965b102016-07-26 15:21:17 -0700689 stackp-name := STRONG
Kees Cook19952a92013-12-19 11:35:58 -0800690else
Kees Cook44c6dc92018-02-06 15:37:45 -0800691 # If either there is no stack protector for this architecture or
692 # CONFIG_CC_STACKPROTECTOR_NONE is selected, we're done, and $(stackp-name)
693 # is empty, skipping all remaining stack protector tests.
694 #
Kees Cook19952a92013-12-19 11:35:58 -0800695 # Force off for distro compilers that enable stack protector by default.
Kees Cook44c6dc92018-02-06 15:37:45 -0800696 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
697endif
Tejun Heo5d707e92009-02-09 22:17:39 +0900698endif
Jan Beulich6c15b322014-02-25 15:01:48 -0800699endif
Kees Cookc965b102016-07-26 15:21:17 -0700700# Find arch-specific stack protector compiler sanity-checking script.
Kees Cook2bc2f682018-02-06 15:37:41 -0800701ifdef stackp-name
Kees Cook44c6dc92018-02-06 15:37:45 -0800702ifneq ($(stackp-flag),)
Kees Cook228d96c2016-07-26 14:26:20 -0700703 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
704 stackp-check := $(wildcard $(stackp-path))
Kees Cook2b838392018-02-06 15:37:38 -0800705 # If the wildcard test matches a test script, run it to check functionality.
706 ifdef stackp-check
707 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
708 stackp-broken := y
709 endif
710 endif
Kees Cook2bc2f682018-02-06 15:37:41 -0800711 ifndef stackp-broken
712 # If the stack protector is functional, enable code that depends on it.
713 KBUILD_CPPFLAGS += -DCONFIG_CC_STACKPROTECTOR
Kees Cook44c6dc92018-02-06 15:37:45 -0800714 # Either we've already detected the flag (for AUTO) or we'll fail the
715 # build in the prepare-compiler-check rule (for specific flag).
716 KBUILD_CFLAGS += $(stackp-flag)
717 else
718 # We have to make sure stack protector is unconditionally disabled if
719 # the compiler is broken (in case we're going to continue the build in
720 # AUTO mode).
721 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
Kees Cook2bc2f682018-02-06 15:37:41 -0800722 endif
Kees Cookc965b102016-07-26 15:21:17 -0700723endif
Kees Cook44c6dc92018-02-06 15:37:45 -0800724endif
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100725
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900726ifeq ($(cc-name),clang)
727KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900728KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
729KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
730KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
731# Quiet clang warning: comparison of unsigned expression < 0 is always false
732KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
733# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
734# source of a reference will be _MergedGlobals and not on of the whitelisted names.
735# See modpost pattern 2
736KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
737KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900738else
739
740# These warnings generated too much noise in a regular build.
741# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
742KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900743endif
744
Sodagudi Prasad0a5f4172018-02-06 15:46:51 -0800745KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200747KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100749# Some targets (ARM with Thumb2, for example), can't be built with frame
750# pointers. For those, we don't have FUNCTION_TRACER automatically
751# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
752# incompatible with -fomit-frame-pointer with current GCC, so we don't use
753# -fomit-frame-pointer with FUNCTION_TRACER.
754ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200755KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100757endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758
Linus Torvalds2062afb2014-07-26 14:52:01 -0700759KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
760
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761ifdef CONFIG_DEBUG_INFO
Andi Kleen866ced92014-07-30 20:50:18 +0200762ifdef CONFIG_DEBUG_INFO_SPLIT
763KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
764else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200765KBUILD_CFLAGS += -g
Andi Kleen866ced92014-07-30 20:50:18 +0200766endif
Behan Webster22883282014-02-14 15:19:17 -0800767KBUILD_AFLAGS += -Wa,-gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768endif
Andi Kleenbfaf2dd2014-07-30 20:50:19 +0200769ifdef CONFIG_DEBUG_INFO_DWARF4
770KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
771endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200773ifdef CONFIG_DEBUG_INFO_REDUCED
Andi Kleene82c4bb2013-02-07 13:58:40 -0800774KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
775 $(call cc-option,-fno-var-tracking)
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200776endif
777
Steven Rostedt606576c2008-10-06 19:06:12 -0400778ifdef CONFIG_FUNCTION_TRACER
Heiko Carstensc0a80c02015-01-09 13:06:33 +0100779ifndef CC_FLAGS_FTRACE
780CC_FLAGS_FTRACE := -pg
781endif
782export CC_FLAGS_FTRACE
Steven Rostedta2546fa2011-02-09 13:15:59 -0500783ifdef CONFIG_HAVE_FENTRY
784CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
785endif
Heiko Carstensc0a80c02015-01-09 13:06:33 +0100786KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
Steven Rostedta2546fa2011-02-09 13:15:59 -0500787KBUILD_AFLAGS += $(CC_USING_FENTRY)
Steven Rostedt72441cb2010-10-13 17:12:30 -0400788ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400789 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400790 BUILD_C_RECORDMCOUNT := y
791 export BUILD_C_RECORDMCOUNT
792 endif
793endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200794endif
795
Sam Ravnborg91341d42008-01-21 21:31:44 +0100796# We trigger additional mismatches with less inlining
797ifdef CONFIG_DEBUG_SECTION_MISMATCH
798KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
799endif
800
Masahiro Yamada90ad4052017-04-14 15:17:26 +0900801ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
802KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,)
803KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
804endif
805
Sam Ravnborge8e69932005-04-30 16:51:42 -0700806# arch Makefile may override CC so keep this after arch Makefile is included
Douglas Anderson4e562072017-10-16 10:12:46 -0700807NOSTDINC_FLAGS += -nostdinc -isystem $(call shell-cached,$(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700808CHECKFLAGS += $(NOSTDINC_FLAGS)
809
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200811KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200813# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200814KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400816# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700817KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700818
Daniel Borkmann87e0d4f2018-03-21 01:18:24 +0100819# clang sets -fmerge-all-constants by default as optimization, but this
820# is non-conforming behavior for C and in fact breaks the kernel, so we
821# need to disable it here generally.
822KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants)
823
824# for gcc -fno-merge-all-constants disables everything, but it is fine
825# to have actual conforming behavior enabled.
826KBUILD_CFLAGS += $(call cc-option,-fmerge-constants)
827
Linus Torvalds3ce120b2017-12-29 17:34:43 -0800828# Make sure -fstack-check isn't enabled (like gentoo apparently did)
829KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
830
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700831# conserve stack if available
832KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
833
Sergei Trofimovich80970472013-09-13 14:51:40 -0700834# disallow errors like 'EXPORT_GPL(foo);' with missing header
835KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
836
837# require functions to have arguments in prototypes, not empty 'int foo()'
838KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
839
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800840# Prohibit date/time macros, which would make the build non-deterministic
841KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
842
Daniel Wagnerea8daa72016-03-08 09:29:09 +0100843# enforce correct pointer usage
844KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
845
Kees Cookc834f0e2017-03-20 17:14:11 -0700846# Require designated initializers for all marked structures
847KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
848
Masahiro Yamadaa73619a2018-03-30 13:15:26 +0900849# change __FILE__ to the relative path from the srctree
850KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
851
Michal Marek40df7592011-04-20 13:45:30 +0200852# use the deterministic mode of AR if available
853KBUILD_ARFLAGS := $(call ar-option,D)
854
Masahiro Yamadaa436bb72015-03-27 20:43:36 +0900855include scripts/Makefile.kasan
856include scripts/Makefile.extrawarn
Andrey Ryabininc6d30852016-01-20 15:00:55 -0800857include scripts/Makefile.ubsan
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900858
Michal Marek61754c12015-07-01 17:19:30 +0200859# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
860# last assignments
861KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
862KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
863KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200864
Roland McGrath18991192007-07-19 01:48:40 -0700865# Use --build-id when available.
Masahiro Yamada0da4fab2018-02-23 13:56:52 +0900866LDFLAGS_BUILD_ID := $(call ld-option, --build-id)
Sam Ravnborg65881692010-07-28 17:33:09 +0200867KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700868LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
869
Nicholas Pigginb67067f2016-08-24 22:29:20 +1000870ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
871LDFLAGS_vmlinux += $(call ld-option, --gc-sections,)
872endif
873
David Howells5d7d18f2009-03-04 11:59:07 -0800874ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200875LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800876endif
877
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200879# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880# set in the environment
881# Also any assignments in arch/$(ARCH)/Makefile take precedence over
882# this default value
883export KBUILD_IMAGE ?= vmlinux
884
885#
886# INSTALL_PATH specifies where to place the updated kernel and system map
887# images. Default is /boot, but you can set it to other values
888export INSTALL_PATH ?= /boot
889
890#
Jason Cooperf4d4ffc2013-12-01 23:56:28 +0000891# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
892# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
893# an argument if needed. Otherwise it defaults to the kernel install path
894#
895export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
896
897#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
899# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200900# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901#
902
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100903MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904export MODLIB
905
Theodore Ts'oac031f22006-06-21 20:53:09 -0400906#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900907# INSTALL_MOD_STRIP, if defined, will cause modules to be
908# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
909# the default option --strip-debug will be used. Otherwise,
910# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100911
Theodore Ts'oac031f22006-06-21 20:53:09 -0400912ifdef INSTALL_MOD_STRIP
913ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100914mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400915else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100916mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400917endif # INSTALL_MOD_STRIP=1
918else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100919mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400920endif # INSTALL_MOD_STRIP
921export mod_strip_cmd
922
Bertrand Jacquinbeb50df2014-08-27 20:31:56 +0930923# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
924# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
925# or CONFIG_MODULE_COMPRESS_XZ.
926
927mod_compress_cmd = true
928ifdef CONFIG_MODULE_COMPRESS
929 ifdef CONFIG_MODULE_COMPRESS_GZIP
Jason A. Donenfeld3d1450d2015-07-07 20:26:07 +0200930 mod_compress_cmd = gzip -n -f
Bertrand Jacquinbeb50df2014-08-27 20:31:56 +0930931 endif # CONFIG_MODULE_COMPRESS_GZIP
932 ifdef CONFIG_MODULE_COMPRESS_XZ
Jason A. Donenfeld3d1450d2015-07-07 20:26:07 +0200933 mod_compress_cmd = xz -f
Bertrand Jacquinbeb50df2014-08-27 20:31:56 +0930934 endif # CONFIG_MODULE_COMPRESS_XZ
935endif # CONFIG_MODULE_COMPRESS
936export mod_compress_cmd
937
P J P1bf49dd2013-11-12 15:11:44 -0800938# Select initial ramdisk compression format, default is gzip(1).
939# This shall be used by the dracut(8) tool while creating an initramfs image.
940#
Jan Beulich7ac18152013-12-18 17:08:57 -0800941INITRD_COMPRESS-y := gzip
942INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
943INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
944INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
945INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
946INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
Linus Torvaldsb7000ad2013-12-20 16:52:45 -0800947# do not export INITRD_COMPRESS, since we didn't actually
948# choose a sane default compression above.
949# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950
Michal Marekd9d8d7e2013-01-25 13:41:31 +1030951ifdef CONFIG_MODULE_SIG_ALL
David Woodhouse3ee550f2015-08-14 16:17:16 +0100952$(eval $(call config_filename,MODULE_SIG_KEY))
953
954mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
Rusty Russelle2a666d2012-10-19 11:53:15 +1030955else
956mod_sign_cmd = true
957endif
958export mod_sign_cmd
959
Josh Poimboeuf9f0c18a2017-02-15 12:21:17 -0600960ifdef CONFIG_STACK_VALIDATION
961 has_libelf := $(call try-run,\
962 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
963 ifeq ($(has_libelf),1)
964 objtool_target := tools/objtool FORCE
965 else
Josh Poimboeuf11af8472017-10-13 15:02:00 -0500966 ifdef CONFIG_UNWINDER_ORC
967 $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
Josh Poimboeuf3dd40cb2017-10-03 20:10:36 -0500968 else
969 $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
970 endif
Josh Poimboeuf9f0c18a2017-02-15 12:21:17 -0600971 SKIP_STACK_VALIDATION := 1
972 export SKIP_STACK_VALIDATION
973 endif
974endif
975
Rusty Russelle2a666d2012-10-19 11:53:15 +1030976
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977ifeq ($(KBUILD_EXTMOD),)
David Howellscfc411e2015-08-14 15:20:41 +0100978core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979
980vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
981 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
Feng Wu37d9fe42015-09-22 16:47:29 +0800982 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983
984vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
Feng Wu37d9fe42015-09-22 16:47:29 +0800985 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
Nicholas Pigginf49821e2018-02-11 00:25:04 +1000987init-y := $(patsubst %/, %/built-in.a, $(init-y))
988core-y := $(patsubst %/, %/built-in.a, $(core-y))
989drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y))
990net-y := $(patsubst %/, %/built-in.a, $(net-y))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
Nicholas Pigginf49821e2018-02-11 00:25:04 +1000992libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
993virt-y := $(patsubst %/, %/built-in.a, $(virt-y))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200995# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200996export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
Nicholas Piggin3a166fc2017-06-20 01:52:05 +1000997export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
998export KBUILD_VMLINUX_LIBS := $(libs-y1)
Sam Ravnborg95698572012-05-05 10:18:40 +0200999export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +02001000export LDFLAGS_vmlinux
Cao jin312a3d02017-08-02 10:31:06 +08001001# used by scripts/package/Makefile
Feng Wu37d9fe42015-09-22 16:47:29 +08001002export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003
Nicholas Piggin3a166fc2017-06-20 01:52:05 +10001004vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005
Masahiro Yamada3fdc7d32018-03-16 16:37:15 +09001006# Recurse until adjust_autoksyms.sh is satisfied
1007PHONY += autoksyms_recursive
1008autoksyms_recursive: $(vmlinux-deps)
Nicolas Pitre2441e782016-04-22 15:25:00 -04001009ifdef CONFIG_TRIM_UNUSED_KSYMS
Nicolas Ferreba79d402016-04-25 17:55:08 +02001010 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
Nicolas Pitre86556392016-12-02 15:11:50 -05001011 "$(MAKE) -f $(srctree)/Makefile vmlinux"
Nicolas Pitre2441e782016-04-22 15:25:00 -04001012endif
Nicolas Pitre23121ca2016-01-26 21:50:18 -05001013
Masahiro Yamada1f50b802018-03-16 16:37:13 +09001014# For the kernel to actually contain only the needed exported symbols,
1015# we have to build modules as well to determine what those symbols are.
1016# (this can be evaluated only once include/config/auto.conf has been included)
1017ifdef CONFIG_TRIM_UNUSED_KSYMS
1018 KBUILD_MODULES := 1
1019endif
1020
Masahiro Yamada07a422b2018-03-16 16:37:12 +09001021autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1022
1023$(autoksyms_h):
1024 $(Q)mkdir -p $(dir $@)
1025 $(Q)touch $@
Nicolas Pitre23121ca2016-01-26 21:50:18 -05001026
Nicholas Pigginfbe6e372016-08-24 22:29:21 +10001027ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1028
1029# Final link of vmlinux with optional arch pass after final link
Cao jin312a3d02017-08-02 10:31:06 +08001030cmd_link-vmlinux = \
1031 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \
Nicholas Pigginfbe6e372016-08-24 22:29:21 +10001032 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
Nicolas Pitre2441e782016-04-22 15:25:00 -04001033
Masahiro Yamada3fdc7d32018-03-16 16:37:15 +09001034vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1035ifdef CONFIG_HEADERS_CHECK
1036 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
1037endif
1038ifdef CONFIG_GDB_SCRIPTS
1039 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1040endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +02001041 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +02001042
Nicolas Pitredd924782016-02-28 22:00:00 -05001043# Build samples along the rest of the kernel
1044ifdef CONFIG_SAMPLES
1045vmlinux-dirs += samples
1046endif
1047
Masahiro Yamada38385f82014-04-28 16:26:18 +09001048# The actual objects are generated when descending,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +02001050$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051
1052# Handle descending into subdirectories listed in $(vmlinux-dirs)
1053# Preset locale variables to speed up the build process. Limit locale
1054# tweaks to this spot to avoid wrong language settings when running
1055# make menuconfig etc.
1056# Error messages still appears in the original language
1057
Paul Smith4f193362006-03-05 17:14:10 -05001058PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001059$(vmlinux-dirs): prepare scripts
Masahiro Yamadaf7adc312017-11-08 01:31:46 +09001060 $(Q)$(MAKE) $(build)=$@ need-builtin=1
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
Michal Marek0d0e7712013-07-11 15:34:51 +02001062define filechk_kernel.release
1063 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1064endef
1065
Geert Uytterhoeven83a35e32013-06-28 11:27:31 +02001066# Store (new) KERNELRELEASE string in include/config/kernel.release
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001067include/config/kernel.release: include/config/auto.conf FORCE
Michal Marek0d0e7712013-07-11 15:34:51 +02001068 $(call filechk,kernel.release)
Sam Ravnborgcb584552006-01-09 21:20:34 +01001069
Masahiro Yamadad8821622018-03-16 16:37:11 +09001070# Additional helpers built in scripts/
1071# Carefully list dependencies so we do not try to build scripts twice
1072# in parallel
1073PHONY += scripts
1074scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
Masahiro Yamada07a422b2018-03-16 16:37:12 +09001075 asm-generic gcc-plugins $(autoksyms_h)
Masahiro Yamadad8821622018-03-16 16:37:11 +09001076 $(Q)$(MAKE) $(build)=$(@)
Sam Ravnborgcb584552006-01-09 21:20:34 +01001077
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001079# or the modules are listed in "prepare".
1080# A multi level approach is used. prepareN is processed before prepareN-1.
1081# archprepare is used in arch Makefiles and when processed asm symlink,
1082# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001084# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -05001085PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001086
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001087# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088# and if so do:
1089# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001090prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001092 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -07001093 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +02001094 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
1095 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 /bin/false; \
1097 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098endif
1099
Kees Cookc965b102016-07-26 15:21:17 -07001100# prepare2 creates a makefile if using a separate output directory.
1101# From this point forward, .config has been reprocessed, so any rules
1102# that need to depend on updated CONFIG_* values can be checked here.
1103prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104
Masahiro Yamada07a422b2018-03-16 16:37:12 +09001105prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
Sam Ravnborgf7f16b72009-10-18 00:00:43 +02001106 include/config/auto.conf
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001107 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108
H. Peter Anvin6520fe52012-05-08 21:22:24 +03001109archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001110
Emese Revfy6b90bd42016-05-24 00:09:38 +02001111prepare0: archprepare gcc-plugins
Sam Ravnborg8d36a622005-09-10 21:05:36 +02001112 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001113
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114# All the preparing..
Josh Poimboeufb9ab5eb2016-02-28 22:22:42 -06001115prepare: prepare0 prepare-objtool
1116
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +09001117# Support for using generic headers in asm-generic
1118PHONY += asm-generic uapi-asm-generic
1119asm-generic: uapi-asm-generic
1120 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1121 src=asm obj=arch/$(SRCARCH)/include/generated/asm
1122uapi-asm-generic:
1123 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1124 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
1125
Josh Poimboeufb9ab5eb2016-02-28 22:22:42 -06001126PHONY += prepare-objtool
Josh Poimboeuf3b27a0c2016-03-03 11:39:30 -06001127prepare-objtool: $(objtool_target)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128
Kees Cookc965b102016-07-26 15:21:17 -07001129# Check for CONFIG flags that require compiler support. Abort the build
1130# after .config has been processed, but before the kernel build starts.
1131#
1132# For security-sensitive CONFIG options, we don't want to fallback and/or
1133# silently change which compiler flags will be used, since that leads to
1134# producing kernels with different security feature characteristics
1135# depending on the compiler used. (For example, "But I selected
1136# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
1137PHONY += prepare-compiler-check
1138prepare-compiler-check: FORCE
1139# Make sure compiler supports requested stack protector flag.
1140ifdef stackp-name
Kees Cook44c6dc92018-02-06 15:37:45 -08001141 # Warn about CONFIG_CC_STACKPROTECTOR_AUTO having found no option.
1142 ifeq ($(stackp-flag),)
1143 @echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1144 Compiler does not support any known stack-protector >&2
1145 else
1146 # Fail if specifically requested stack protector is missing.
Kees Cookc965b102016-07-26 15:21:17 -07001147 ifeq ($(call cc-option, $(stackp-flag)),)
1148 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1149 $(stackp-flag) not supported by compiler >&2 && exit 1
1150 endif
Kees Cook44c6dc92018-02-06 15:37:45 -08001151 endif
Kees Cookc965b102016-07-26 15:21:17 -07001152endif
Kees Cook44c6dc92018-02-06 15:37:45 -08001153# Make sure compiler does not have buggy stack-protector support. If a
1154# specific stack-protector was requested, fail the build, otherwise warn.
Kees Cook2b838392018-02-06 15:37:38 -08001155ifdef stackp-broken
Kees Cook44c6dc92018-02-06 15:37:45 -08001156 ifeq ($(stackp-name),AUTO)
1157 @echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1158 $(stackp-flag) available but compiler is broken: disabling >&2
1159 else
Kees Cookc965b102016-07-26 15:21:17 -07001160 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1161 $(stackp-flag) available but compiler is broken >&2 && exit 1
Kees Cook44c6dc92018-02-06 15:37:45 -08001162 endif
Kees Cookc965b102016-07-26 15:21:17 -07001163endif
1164 @:
1165
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166# Generate some files
1167# ---------------------------------------------------------------------------
1168
1169# KERNELRELEASE can change from a few different places, meaning version.h
1170# needs to be updated, so this check is forced on all builds
1171
1172uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001173define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001175 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1176 exit 1; \
1177 fi; \
1178 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179endef
1180
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001181define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +01001182 (echo \#define LINUX_VERSION_CODE $(shell \
1183 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001184 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1185endef
1186
David Howellsd183e6f2012-10-02 18:01:56 +01001187$(version_h): $(srctree)/Makefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 $(call filechk,version.h)
Michal Marek223c24a2014-11-27 16:13:17 +01001189 $(Q)rm -f $(old_version_h)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190
Sam Ravnborg273b2812009-10-18 00:52:28 +02001191include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001192 $(call filechk,utsrelease.h)
1193
Vegard Nossum179efcb2008-12-16 12:33:43 +01001194PHONY += headerdep
1195headerdep:
Peter Foley9663d982011-04-26 17:17:11 -04001196 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1197 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +01001198
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001200# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001201
Sam Ravnborge6883b12008-06-05 16:43:46 +02001202#Default location for installed headers
1203export INSTALL_HDR_PATH = $(objtree)/usr
1204
Masahiro Yamada9d022c52017-10-04 12:56:04 +09001205# If we do an all arch process set dst to include/arch-$(SRCARCH)
1206hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001207
H. Peter Anvin052ad272011-11-17 13:17:35 -08001208PHONY += archheaders
1209archheaders:
1210
H. Peter Anvin6520fe52012-05-08 21:22:24 +03001211PHONY += archscripts
1212archscripts:
1213
Sam Ravnborge6883b12008-06-05 16:43:46 +02001214PHONY += __headers
Masahiro Yamadaa9d9a402017-07-10 03:32:59 +09001215__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
Mike Waychisone1b702c2011-03-14 23:34:25 -07001216 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001217
1218PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001219headers_install_all:
1220 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001221
David Woodhouse8d730cf2006-06-18 11:58:39 +01001222PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001223headers_install: __headers
Masahiro Yamada9d022c52017-10-04 12:56:04 +09001224 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
David Howells10b63952012-10-02 18:01:57 +01001225 $(error Headers not exportable for the $(SRCARCH) architecture))
Masahiro Yamadaa8ff49a2017-07-10 03:32:35 +09001226 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
Masahiro Yamada9d022c52017-10-04 12:56:04 +09001227 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001228
Mike Frysinger1f857122007-02-14 00:33:02 -08001229PHONY += headers_check_all
1230headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001231 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001232
David Woodhouse68475352006-06-18 12:02:10 +01001233PHONY += headers_check
1234headers_check: headers_install
Masahiro Yamadaa8ff49a2017-07-10 03:32:35 +09001235 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
Masahiro Yamada9d022c52017-10-04 12:56:04 +09001236 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001237
David Woodhouse8d730cf2006-06-18 11:58:39 +01001238# ---------------------------------------------------------------------------
Shuah Khan5a5da782014-08-07 13:07:46 -06001239# Kernel selftest
1240
1241PHONY += kselftest
1242kselftest:
Shuah Khan2bc84522017-09-06 16:44:35 -06001243 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
Shuah Khan5a5da782014-08-07 13:07:46 -06001244
Shuah Khan801d2e92017-08-18 15:54:41 -06001245PHONY += kselftest-clean
Wang Longdcb825a2015-10-08 02:41:18 +00001246kselftest-clean:
Shuah Khan2bc84522017-09-06 16:44:35 -06001247 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
Wang Longdcb825a2015-10-08 02:41:18 +00001248
Bamvor Jian Zhang3d6dee72016-01-08 15:27:34 +08001249PHONY += kselftest-merge
1250kselftest-merge:
1251 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1252 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1253 -m $(objtree)/.config \
1254 $(srctree)/tools/testing/selftests/*/config
1255 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1256
Shuah Khan5a5da782014-08-07 13:07:46 -06001257# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258# Modules
1259
1260ifdef CONFIG_MODULES
1261
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001262# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263
Michal Marek73d13932010-03-10 12:28:58 +01001264all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001266# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001267#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001268# A module can be listed more than once in obj-m resulting in
1269# duplicate lines in modules.order files. Those are removed
1270# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271
Paul Smith4f193362006-03-05 17:14:10 -05001272PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001273modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001274 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001275 @$(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
Michal Mareka6c36632010-03-08 10:07:12 +01001278modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1279 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1280
Michal Marek73d13932010-03-10 12:28:58 +01001281%/modules.builtin: include/config/auto.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001282 $(Q)$(MAKE) $(modbuiltin)=$*
1283
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284
1285# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001286PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001287modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288
1289# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001290PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291modules_install: _modinst_ _modinst_post
1292
Paul Smith4f193362006-03-05 17:14:10 -05001293PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001294_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 @rm -rf $(MODLIB)/kernel
1296 @rm -f $(MODLIB)/source
1297 @mkdir -p $(MODLIB)/kernel
Masahiro Yamada8e9b4662017-08-20 15:04:11 +09001298 @ln -s $(abspath $(srctree)) $(MODLIB)/source
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1300 rm -f $(MODLIB)/build ; \
Michal Marek7e1c0472014-04-25 17:29:45 +02001301 ln -s $(CURDIR) $(MODLIB)/build ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001303 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001304 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001305 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001307# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308# boot a modules.dep even before / is mounted read-write. However the
1309# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001310PHONY += _modinst_post
Linus Torvalds6d128e12013-07-10 19:02:51 -07001311_modinst_post: _modinst_
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001312 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
Josh Boyerd890f512012-11-05 09:09:24 +10301314ifeq ($(CONFIG_MODULE_SIG), y)
1315PHONY += modules_sign
1316modules_sign:
1317 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1318endif
1319
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320else # CONFIG_MODULES
1321
1322# Modules not configured
1323# ---------------------------------------------------------------------------
1324
Masahiro Yamada612e47c2016-03-13 09:39:22 +09001325PHONY += modules modules_install
1326modules modules_install:
Michal Marek5369f552012-07-07 23:04:40 +02001327 @echo >&2
1328 @echo >&2 "The present kernel configuration has modules disabled."
1329 @echo >&2 "Type 'make config' and enable loadable module support."
1330 @echo >&2 "Then build a kernel with module support enabled."
1331 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 @exit 1
1333
1334endif # CONFIG_MODULES
1335
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336###
1337# Cleaning is done on three levels.
1338# make clean Delete most generated files
1339# Leave enough to build external modules
1340# make mrproper Delete the current configuration, and all generated files
1341# make distclean Remove editor backup files, patch leftover files and the like
1342
1343# Directories & files removed with 'make clean'
Masahiro Yamadafbfa9be2018-03-16 16:37:14 +09001344CLEAN_DIRS += $(MODVERDIR) include/ksym
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
1346# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001347MRPROPER_DIRS += include/config usr/include include/generated \
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001348 arch/*/include/generated .tmp_objdiff
Masahiro Yamada278ae602017-09-22 14:31:13 +09001349MRPROPER_FILES += .config .config.old .version \
Rusty Russelld5b71932012-10-02 14:35:24 +09301350 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
David Woodhousefb117942015-07-20 21:16:30 +01001351 signing_key.pem signing_key.priv signing_key.x509 \
1352 x509.genkey extra_certificates signing_key.x509.keyid \
Jan Kiszka3ee7b3f2015-02-17 13:46:36 -08001353 signing_key.x509.signer vmlinux-gdb.py
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354
1355# clean - Delete most, but leave enough to build external modules
1356#
1357clean: rm-dirs := $(CLEAN_DIRS)
1358clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -07001359clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
Pawel Mollbd1ee802012-10-29 11:23:02 +00001361PHONY += $(clean-dirs) clean archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362$(clean-dirs):
1363 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1364
Pawel Mollbd1ee802012-10-29 11:23:02 +00001365vmlinuxclean:
1366 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
Nicholas Pigginfbe6e372016-08-24 22:29:21 +10001367 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
Pawel Mollbd1ee802012-10-29 11:23:02 +00001368
1369clean: archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
1371# mrproper - Delete all generated files, including .config
1372#
1373mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1374mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
Mauro Carvalho Chehabcb43fb52017-05-14 11:50:01 -03001375mrproper-dirs := $(addprefix _mrproper_,scripts)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376
Paul Smith4f193362006-03-05 17:14:10 -05001377PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378$(mrproper-dirs):
1379 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1380
1381mrproper: clean archmrproper $(mrproper-dirs)
1382 $(call cmd,rmdirs)
1383 $(call cmd,rmfiles)
1384
1385# distclean
1386#
Paul Smith4f193362006-03-05 17:14:10 -05001387PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388
1389distclean: mrproper
1390 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001391 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Masahiro Yamadaf78271d2017-01-22 23:02:32 +09001392 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1393 -o -name 'core' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 -type f -print | xargs rm -f
1395
1396
1397# Packaging of the kernel to various formats
1398# ---------------------------------------------------------------------------
1399# rpm target kept for backward compatibility
Michal Marekc79624c2014-07-04 22:53:52 +02001400package-dir := scripts/package
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001402%src-pkg: FORCE
1403 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001404%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001405 $(Q)$(MAKE) $(build)=$(package-dir) $@
Masahiro Yamadaebaad7d2017-11-15 18:19:20 +09001406rpm: rpm-pkg
1407 @echo " WARNING: \"rpm\" target will be removed after Linux 4.18"
1408 @echo " Please use \"rpm-pkg\" instead."
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409
1410
1411# Brief documentation of the typical targets used
1412# ---------------------------------------------------------------------------
1413
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001414boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Konstantin Khlebnikova1e7b7b2014-10-28 17:18:20 +04001415boards := $(sort $(notdir $(boards)))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001416board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1417board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418
Masahiro Yamadafe69b422016-03-13 09:39:55 +09001419PHONY += help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420help:
1421 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001422 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001423 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001424 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001425 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426 @echo ''
1427 @echo 'Configuration targets:'
1428 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1429 @echo ''
1430 @echo 'Other generic targets:'
1431 @echo ' all - Build all targets marked with [*]'
1432 @echo '* vmlinux - Build the bare kernel'
1433 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001434 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 @echo ' dir/ - Build all files in dir and below'
Wang YanQing40ab87a2015-12-11 00:35:19 +08001436 @echo ' dir/file.[ois] - Build specified target only'
Vinícius Tinti433db3e2017-04-24 13:04:58 -07001437 @echo ' dir/file.ll - Build the LLVM assembly file'
1438 @echo ' (requires compiler support for LLVM assembly generation)'
Joe Perches62718972010-01-13 09:31:44 -08001439 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1440 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001441 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001442 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 @echo ' tags/TAGS - Generate tags file for editors'
1444 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001445 @echo ' gtags - Generate GNU GLOBAL index'
Michal Marek3f1d9a62014-07-11 15:57:24 +02001446 @echo ' kernelrelease - Output the release version string (use with make -s)'
1447 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1448 @echo ' image_name - Output the image name (use with make -s)'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001449 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001450 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001451 echo ''
Randy Dunlap31b8cc82017-05-08 15:55:08 -07001452 @echo 'Static analysers:'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453 @echo ' checkstack - Generate a list of stack hogs'
1454 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001455 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001456 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001457 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001458 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001459 @echo ' headerdep - Detect inclusion cycles in headers'
Masahiro Yamada7f855fc82017-11-14 18:47:20 +09001460 @echo ' coccicheck - Check with Coccinelle'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001461 @echo ''
Randy Dunlap31b8cc82017-05-08 15:55:08 -07001462 @echo 'Kernel selftest:'
Shuah Khan5a5da782014-08-07 13:07:46 -06001463 @echo ' kselftest - Build and run kernel selftest (run as root)'
1464 @echo ' Build, install, and boot kernel before'
1465 @echo ' running kselftest on it'
Wang Longdcb825a2015-10-08 02:41:18 +00001466 @echo ' kselftest-clean - Remove all generated kselftest files'
Randy Dunlapbbfe63b2017-10-06 17:17:52 -07001467 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
Bamvor Jian Zhang3d6dee72016-01-08 15:27:34 +08001468 @echo ' .config.'
Shuah Khan5a5da782014-08-07 13:07:46 -06001469 @echo ''
Randy Dunlap31b8cc82017-05-08 15:55:08 -07001470 @echo 'Userspace tools targets:'
1471 @echo ' use "make tools/help"'
1472 @echo ' or "cd tools; make help"'
1473 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001475 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 @echo ''
1477 @echo 'Documentation targets:'
Mauro Carvalho Chehabcb43fb52017-05-14 11:50:01 -03001478 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001480 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001482 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 @echo ''
1484 @$(if $(boards), \
1485 $(foreach b, $(boards), \
1486 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1487 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001488 @$(if $(board-dirs), \
1489 $(foreach b, $(board-dirs), \
1490 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1491 printf " %-16s - Show all of the above\\n" help-boards; \
1492 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493
1494 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001495 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Cao jin9ba26a72017-06-06 17:07:53 +08001497 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001498 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001499 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001500 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1501 @echo ' 1: warnings which may be relevant and do not occur too often'
1502 @echo ' 2: warnings which occur quite often but may still be relevant'
1503 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001504 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 @echo ''
1506 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1507 @echo 'For further info see the ./README file'
1508
1509
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001510help-board-dirs := $(addprefix help-,$(board-dirs))
1511
1512help-boards: $(help-board-dirs)
1513
Michal Marekfbae4d52014-11-28 13:31:43 +01001514boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001515
1516$(help-board-dirs): help-%:
1517 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1518 @$(if $(boards-per-dir), \
1519 $(foreach b, $(boards-per-dir), \
1520 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1521 echo '')
1522
1523
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524# Documentation targets
1525# ---------------------------------------------------------------------------
Jani Nikulae8939222017-10-09 18:26:15 +03001526DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1527 linkcheckdocs dochelp refcheckdocs
Jani Nikula22cba312016-05-19 15:14:05 +03001528PHONY += $(DOC_TARGETS)
1529$(DOC_TARGETS): scripts_basic FORCE
Mauro Carvalho Chehabcb43fb52017-05-14 11:50:01 -03001530 $(Q)$(MAKE) $(build)=Documentation $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531
1532else # KBUILD_EXTMOD
1533
1534###
1535# External module support.
1536# When building external modules the kernel used as basis is considered
1537# read-only, and no consistency checks are made and the make
1538# system is not used on the basis kernel. If updates are required
1539# in the basis kernel ordinary make commands (without M=...) must
1540# be used.
1541#
1542# The following are the only valid targets when building external
1543# modules.
1544# make M=dir clean Delete all automatically generated files
1545# make M=dir modules Make all modules in specified dir
1546# make M=dir Same as 'make M=dir modules'
1547# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001548# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549# Assumes install directory is already created
1550
1551# We are always building modules
1552KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001553PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001555 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556
Paul Smith4f193362006-03-05 17:14:10 -05001557PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558$(objtree)/Module.symvers:
1559 @test -e $(objtree)/Module.symvers || ( \
1560 echo; \
1561 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1562 echo " is missing; modules will have no dependencies and modversions."; \
1563 echo )
1564
1565module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001566PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567$(module-dirs): crmodverdir $(objtree)/Module.symvers
1568 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1569
1570modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001571 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001572 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573
Paul Smith4f193362006-03-05 17:14:10 -05001574PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001575modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001576
Paul Smith4f193362006-03-05 17:14:10 -05001577install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1578PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001579_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001580 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001581 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582
Paul Smith4f193362006-03-05 17:14:10 -05001583PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001584_emodinst_post: _emodinst_
1585 $(call cmd,depmod)
1586
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1588
Paul Smith4f193362006-03-05 17:14:10 -05001589PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590$(clean-dirs):
1591 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1592
1593clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001594clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595
Masahiro Yamadafe69b422016-03-13 09:39:55 +09001596PHONY += help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597help:
1598 @echo ' Building external modules.'
1599 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1600 @echo ''
1601 @echo ' modules - default target, build the module(s)'
1602 @echo ' modules_install - install the module'
1603 @echo ' clean - remove generated files in module directory only'
1604 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001605
1606# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001607PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001608prepare: ;
1609scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610endif # KBUILD_EXTMOD
1611
Michal Marek88d7be02010-09-06 12:00:08 +02001612clean: $(clean-dirs)
1613 $(call cmd,rmdirs)
1614 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001615 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Masahiro Yamadaef46d9b2017-11-17 01:49:13 +09001616 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
Masahiro Yamada74ce1892017-11-02 11:51:25 +09001617 -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \
Masahiro Yamadaef46d9b2017-11-17 01:49:13 +09001618 -o -name '*.dwo' -o -name '*.lst' \
Rasmus Villemoesd523b252015-08-20 11:53:29 +02001619 -o -name '*.su' \
Michal Marek88d7be02010-09-06 12:00:08 +02001620 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Masahiro Yamada9a8dfb32018-03-23 22:04:31 +09001621 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
Masahiro Yamada4fa8bc92018-03-23 22:04:37 +09001622 -o -name '*.asn1.[ch]' \
Michal Marek88d7be02010-09-06 12:00:08 +02001623 -o -name '*.symtypes' -o -name 'modules.order' \
1624 -o -name modules.builtin -o -name '.tmp_*.o.*' \
Douglas Anderson3298b692017-10-16 10:12:45 -07001625 -o -name .cache.mk \
Emese Revfy6b90bd42016-05-24 00:09:38 +02001626 -o -name '*.c.[012]*.*' \
Vinícius Tinti433db3e2017-04-24 13:04:58 -07001627 -o -name '*.ll' \
Michal Marek88d7be02010-09-06 12:00:08 +02001628 -o -name '*.gcno' \) -type f -print | xargs rm -f
1629
Linus Torvalds1da177e2005-04-16 15:20:36 -07001630# Generate tags for editors
1631# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001632quiet_cmd_tags = GEN $@
1633 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001635tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636 $(call cmd,tags)
1637
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638# Scripts to check various things for consistency
1639# ---------------------------------------------------------------------------
1640
Peter Foley279f3dd2011-04-26 17:15:01 -04001641PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1642
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001644 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001646 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647
1648versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001649 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001651 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652
Nicolas Palix74425ee2010-06-06 17:15:01 +02001653coccicheck:
1654 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1655
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656namespacecheck:
1657 $(PERL) $(srctree)/scripts/namespace.pl
1658
Adrian Bunk295ac052007-08-24 23:04:56 +02001659export_report:
1660 $(PERL) $(srctree)/scripts/export_report.pl
1661
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662endif #ifeq ($(config-targets),1)
1663endif #ifeq ($(mixed-targets),1)
1664
Mike Marciniszync398ff02013-06-24 08:48:37 -04001665PHONY += checkstack kernelrelease kernelversion image_name
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001666
Jeff Dike011e3a92006-12-13 00:34:12 -08001667# UML needs a little special treatment here. It wants to use the host
1668# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1669# else wants $(ARCH), including people doing cross-builds, which means
1670# that $(SUBARCH) doesn't work here.
1671ifeq ($(ARCH), um)
1672CHECKSTACK_ARCH := $(SUBARCH)
1673else
1674CHECKSTACK_ARCH := $(ARCH)
1675endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676checkstack:
1677 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001678 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001680kernelrelease:
1681 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001682
Sam Ravnborgcb584552006-01-09 21:20:34 +01001683kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001684 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685
Mike Marciniszync398ff02013-06-24 08:48:37 -04001686image_name:
1687 @echo $(KBUILD_IMAGE)
1688
Borislav Petkovea01fa92012-04-11 18:36:18 +02001689# Clear a bunch of variables before executing the submake
1690tools/: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001691 $(Q)mkdir -p $(objtree)/tools
Masahiro Yamada8e9b4662017-08-20 15:04:11 +09001692 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
Borislav Petkovea01fa92012-04-11 18:36:18 +02001693
1694tools/%: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001695 $(Q)mkdir -p $(objtree)/tools
Masahiro Yamada8e9b4662017-08-20 15:04:11 +09001696 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
Borislav Petkovea01fa92012-04-11 18:36:18 +02001697
Sam Ravnborg06300b22006-01-25 07:13:18 +01001698# Single targets
1699# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001700# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001701# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001702# - build with separate output dir 'make O=...'
1703# - external modules
1704#
1705# target-dir => where to store outputfile
1706# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001707
Sam Ravnborg06300b22006-01-25 07:13:18 +01001708ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001709 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001710 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001711else
1712 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001713 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1714 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001715endif
1716
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001717%.s: %.c prepare scripts FORCE
1718 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1719%.i: %.c prepare scripts FORCE
1720 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1721%.o: %.c prepare scripts FORCE
1722 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1723%.lst: %.c prepare scripts FORCE
1724 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1725%.s: %.S prepare scripts FORCE
1726 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1727%.o: %.S prepare scripts FORCE
1728 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001729%.symtypes: %.c prepare scripts FORCE
1730 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Vinícius Tinti433db3e2017-04-24 13:04:58 -07001731%.ll: %.c prepare scripts FORCE
1732 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001733
1734# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001735/: prepare scripts FORCE
1736 $(cmd_crmodverdir)
1737 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1738 $(build)=$(build-dir)
Peter Foley8e2faea2014-09-25 11:23:58 -07001739# Make sure the latest headers are built for Documentation
Arnd Bergmannddea05f2016-07-04 16:39:35 +02001740Documentation/ samples/: headers_install
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001741%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001742 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001743 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001744 $(build)=$(build-dir)
1745%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001746 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001747 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001748 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001749 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001750
Masahiro Yamada38385f82014-04-28 16:26:18 +09001751# FIXME Should go into a make.lib or something
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752# ===========================================================================
1753
1754quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1755 cmd_rmdirs = rm -rf $(rm-dirs)
1756
1757quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1758 cmd_rmfiles = rm -f $(rm-files)
1759
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001760# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001761quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001762 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
Rusty Russellb92021b2013-03-15 15:04:17 +10301763 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001764
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001765# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001766# clean it up only when building all modules
1767cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1768 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770# read all saved command lines
1771
Masahiro Yamada2982c952017-11-13 19:29:35 +09001772cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773
1774ifneq ($(cmd_files),)
1775 $(cmd_files): ; # Do not try to update included dependency files
1776 include $(cmd_files)
1777endif
1778
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779endif # skip-makefile
1780
Paul Smith4f193362006-03-05 17:14:10 -05001781PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001783
Paul Smith4f193362006-03-05 17:14:10 -05001784# Declare the contents of the .PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001785# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001786.PHONY: $(PHONY)