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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 Torvalds5b394b22018-08-26 14:11:59 -07003PATCHLEVEL = 19
Greg Kroah-Hartman7d8dbef2019-11-10 11:27:57 +01004SUBLEVEL = 83
Greg Kroah-Hartman84df9522018-10-22 07:37:37 +01005EXTRAVERSION =
6NAME = "People's Front"
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 \
Masahiro Yamada63e31a62018-08-04 13:47:02 +0900227 %asm-generic kernelversion %src-pkg
Masahiro Yamadaa29d4d82018-07-20 16:46:35 +0900228no-sync-config-targets := $(no-dot-config-targets) install %install \
229 kernelrelease
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900230
Masahiro Yamadad7942412018-07-20 16:46:34 +0900231config-targets := 0
232mixed-targets := 0
233dot-config := 1
234may-sync-config := 1
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900235
236ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
237 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
238 dot-config := 0
239 endif
240endif
241
Masahiro Yamadad7942412018-07-20 16:46:34 +0900242ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
243 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
244 may-sync-config := 0
245 endif
246endif
247
248ifneq ($(KBUILD_EXTMOD),)
249 may-sync-config := 0
250endif
251
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900252ifeq ($(KBUILD_EXTMOD),)
253 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
254 config-targets := 1
255 ifneq ($(words $(MAKECMDGOALS)),1)
256 mixed-targets := 1
257 endif
258 endif
259endif
Masahiro Yamada22340a02018-02-11 17:40:29 +0900260
261# For "make -j clean all", "make -j mrproper defconfig all", etc.
262ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
263 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
264 mixed-targets := 1
265 endif
266endif
267
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900268# install and modules_install need also be processed one by one
269ifneq ($(filter install,$(MAKECMDGOALS)),)
270 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
271 mixed-targets := 1
272 endif
273endif
274
275ifeq ($(mixed-targets),1)
276# ===========================================================================
277# We're called with mixed targets (*config and build targets).
278# Handle them one by one.
279
280PHONY += $(MAKECMDGOALS) __build_one_by_one
281
282$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
283 @:
284
285__build_one_by_one:
286 $(Q)set -e; \
287 for i in $(MAKECMDGOALS); do \
288 $(MAKE) -f $(srctree)/Makefile $$i; \
289 done
290
291else
292
293# We need some generic definitions (do not try to remake the file).
294scripts/Kbuild.include: ;
295include scripts/Kbuild.include
296
297# Read KERNELRELEASE from include/config/kernel.release (if it exists)
298KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
299KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
300export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
301
Anders Roxellb2d35fa2018-09-04 12:47:21 +0200302include scripts/subarch.include
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304# Cross compiling and selecting different set of gcc/bin-utils
305# ---------------------------------------------------------------------------
306#
307# When performing cross compilation for other architectures ARCH shall be set
308# to the target architecture. (See arch/* for the possibilities).
309# ARCH can be set during invocation of make:
310# make ARCH=ia64
311# Another way is to have ARCH set in the environment.
312# The default ARCH is the host where make is executed.
313
314# CROSS_COMPILE specify the prefix used for all executables used
315# during compilation. Only gcc and related bin-utils executables
316# are prefixed with $(CROSS_COMPILE).
317# CROSS_COMPILE can be set on the command line
318# make CROSS_COMPILE=ia64-linux-
319# Alternatively CROSS_COMPILE can be set in the environment.
320# Default value for CROSS_COMPILE is not to prefix executables
321# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Sam Ravnborg2331d1a2009-10-11 23:22:58 +0200322ARCH ?= $(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
324# Architecture as present in compile.h
Thomas Gleixner6752ed92007-10-11 11:11:36 +0200325UTS_MACHINE := $(ARCH)
326SRCARCH := $(ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327
Sam Ravnborgd746d642007-11-12 20:14:19 +0100328# Additional ARCH settings for x86
329ifeq ($(ARCH),i386)
330 SRCARCH := x86
331endif
332ifeq ($(ARCH),x86_64)
333 SRCARCH := x86
334endif
Sam Ravnborg74b469f2007-10-25 19:42:04 +0200335
Sam Ravnborg5e538792008-12-02 23:17:12 -0800336# Additional ARCH settings for sparc
Namhyung Kime69f58c2010-10-25 05:48:23 +0000337ifeq ($(ARCH),sparc32)
338 SRCARCH := sparc
339endif
Sam Ravnborga439fe52008-07-27 23:00:59 +0200340ifeq ($(ARCH),sparc64)
Sam Ravnborg5e538792008-12-02 23:17:12 -0800341 SRCARCH := sparc
Sam Ravnborga439fe52008-07-27 23:00:59 +0200342endif
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +0200343
Paul Mundt3cc000b2009-04-11 08:39:27 +0900344# Additional ARCH settings for sh
345ifeq ($(ARCH),sh64)
346 SRCARCH := sh
347endif
348
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700349KCONFIG_CONFIG ?= .config
Ben Gardiner41263fc2010-12-14 11:39:44 -0500350export KCONFIG_CONFIG
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700351
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352# SHELL used by kbuild
353CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
354 else if [ -x /bin/bash ]; then echo /bin/bash; \
355 else echo sh; fi ; fi)
356
Masahiro Yamada6d79a7b2018-07-12 19:38:36 +0900357HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
358HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
359HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
Uwe Kleine-Königd7f14c62017-07-09 20:02:36 +0200360
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200361HOSTCC = gcc
362HOSTCXX = g++
Laura Abbott96f14fe2018-07-09 17:45:58 -0700363KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
Laura Abbottf92d19e2018-07-09 17:46:02 -0700364 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
365 $(HOSTCFLAGS)
366KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
367KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
368KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370# Make variables (CC, etc...)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371AS = $(CROSS_COMPILE)as
372LD = $(CROSS_COMPILE)ld
373CC = $(CROSS_COMPILE)gcc
374CPP = $(CC) -E
375AR = $(CROSS_COMPILE)ar
376NM = $(CROSS_COMPILE)nm
377STRIP = $(CROSS_COMPILE)strip
378OBJCOPY = $(CROSS_COMPILE)objcopy
379OBJDUMP = $(CROSS_COMPILE)objdump
Masahiro Yamada73a4f6d2017-12-10 01:02:28 +0900380LEX = flex
381YACC = bison
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382AWK = awk
383GENKSYMS = scripts/genksyms/genksyms
Sam Ravnborgcaa27b62009-07-20 21:37:11 +0200384INSTALLKERNEL := installkernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385DEPMOD = /sbin/depmod
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386PERL = perl
Masahiro Yamada011bf122014-07-18 13:40:11 +0900387PYTHON = python
Masahiro Yamadae9781b52018-03-13 18:12:02 +0900388PYTHON2 = python2
389PYTHON3 = python3
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390CHECK = sparse
391
Hannes Eder80a7d1d2008-12-27 22:38:44 +0100392CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
Luc Van Oostenryck6c49f352018-02-15 22:07:50 +0100393 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
Michal Marekb36fad62016-06-07 11:57:02 +0200394NOSTDINC_FLAGS =
Sam Ravnborg65881692010-07-28 17:33:09 +0200395CFLAGS_MODULE =
396AFLAGS_MODULE =
397LDFLAGS_MODULE =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398CFLAGS_KERNEL =
399AFLAGS_KERNEL =
Michal Marekb36fad62016-06-07 11:57:02 +0200400LDFLAGS_vmlinux =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
David Howellsabbf1592012-10-02 18:01:26 +0100402# Use USERINCLUDE when you must reference the UAPI directories only.
403USERINCLUDE := \
Masahiro Yamada9d022c52017-10-04 12:56:04 +0900404 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
405 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
David Howellsabbf1592012-10-02 18:01:26 +0100406 -I$(srctree)/include/uapi \
Arnd Bergmann3308b282016-06-15 17:45:45 +0200407 -I$(objtree)/include/generated/uapi \
David Howellsabbf1592012-10-02 18:01:26 +0100408 -include $(srctree)/include/linux/kconfig.h
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410# Use LINUXINCLUDE when you must reference the include/ directory.
411# Needed to be compatible with the O= option
David Howellsabbf1592012-10-02 18:01:26 +0100412LINUXINCLUDE := \
Masahiro Yamada9d022c52017-10-04 12:56:04 +0900413 -I$(srctree)/arch/$(SRCARCH)/include \
414 -I$(objtree)/arch/$(SRCARCH)/include/generated \
David Howellsabbf1592012-10-02 18:01:26 +0100415 $(if $(KBUILD_SRC), -I$(srctree)/include) \
Masahiro Yamadaf8224f72017-06-06 16:15:28 +0900416 -I$(objtree)/include \
417 $(USERINCLUDE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
Masahiro Yamada433dc2e2017-10-12 18:22:25 +0900419KBUILD_AFLAGS := -D__ASSEMBLY__
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200420KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
Arnd Bergmann8c970232017-07-26 15:36:23 +0200421 -fno-strict-aliasing -fno-common -fshort-wchar \
Floris Kraaka8735822009-06-15 08:54:02 +0300422 -Werror-implicit-function-declaration \
Kirill A. Shutemov51b97e32014-10-20 12:23:12 +0300423 -Wno-format-security \
Masahiro Yamada433dc2e2017-10-12 18:22:25 +0900424 -std=gnu89
425KBUILD_CPPFLAGS := -D__KERNEL__
Sam Ravnborg80c00ba2010-07-28 19:11:27 +0200426KBUILD_AFLAGS_KERNEL :=
427KBUILD_CFLAGS_KERNEL :=
Sam Ravnborg65881692010-07-28 17:33:09 +0200428KBUILD_AFLAGS_MODULE := -DMODULE
429KBUILD_CFLAGS_MODULE := -DMODULE
430KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
Masahiro Yamadad503ac52018-08-24 08:20:39 +0900431KBUILD_LDFLAGS :=
Masahiro Yamada433dc2e2017-10-12 18:22:25 +0900432GCC_PLUGINS_CFLAGS :=
Masahiro Yamada4c5a4422019-07-29 18:15:17 +0900433CLANG_FLAGS :=
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
Laura Abbott96f14fe2018-07-09 17:45:58 -0700435export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
Laura Abbott8377bd22018-07-09 17:46:01 -0700436export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS
Masahiro Yamadae9781b52018-03-13 18:12:02 +0900437export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
Laura Abbott10844ae2018-07-09 17:45:59 -0700438export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Masahiro Yamadad503ac52018-08-24 08:20:39 +0900440export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_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 ($(CROSS_COMPILE),)
Masahiro Yamada4c5a4422019-07-29 18:15:17 +0900486CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
Nick Desaulniersf66a52d2019-02-11 11:30:04 -0800487GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
Masahiro Yamada1637d5d2018-11-06 12:04:55 +0900488CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)
Stefan Agneref8c4ed2018-09-17 19:31:57 -0700489GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
Chris Friesae6b2892017-11-07 11:46:13 -0800490endif
491ifneq ($(GCC_TOOLCHAIN),)
Masahiro Yamada1637d5d2018-11-06 12:04:55 +0900492CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
Chris Friesae6b2892017-11-07 11:46:13 -0800493endif
Masahiro Yamada1637d5d2018-11-06 12:04:55 +0900494CLANG_FLAGS += -no-integrated-as
Nathan Chancellor27f23352019-06-11 11:43:31 -0700495CLANG_FLAGS += -Werror=unknown-warning-option
Masahiro Yamada1637d5d2018-11-06 12:04:55 +0900496KBUILD_CFLAGS += $(CLANG_FLAGS)
497KBUILD_AFLAGS += $(CLANG_FLAGS)
Joel Stanleyf4c27d52018-11-12 14:51:15 +1030498export CLANG_FLAGS
Chris Friesae6b2892017-11-07 11:46:13 -0800499endif
500
Peter Zijlstrad5028ba2018-02-06 09:46:13 +0100501RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
Andy Lutomirski2e549b22018-08-16 12:41:15 -0700502RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
Peter Zijlstrad5028ba2018-02-06 09:46:13 +0100503RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
Andy Lutomirski2e549b22018-08-16 12:41:15 -0700504RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
Peter Zijlstrad5028ba2018-02-06 09:46:13 +0100505RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
Andy Lutomirski2e549b22018-08-16 12:41:15 -0700506RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
Peter Zijlstrad5028ba2018-02-06 09:46:13 +0100507export RETPOLINE_CFLAGS
Andy Lutomirski2e549b22018-08-16 12:41:15 -0700508export RETPOLINE_VDSO_CFLAGS
Peter Zijlstrad5028ba2018-02-06 09:46:13 +0100509
Michal Kubecek8438ee72018-05-16 07:51:36 +0200510KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
511KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
512
Masahiro Yamada315bab42018-06-08 09:21:43 +0900513# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
514# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
515# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
516# and from include/config/auto.conf.cmd to detect the compiler upgrade.
517CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1)
518
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519ifeq ($(config-targets),1)
520# ===========================================================================
521# *config targets only - make sure prerequisites are updated, and descend
522# in scripts/kconfig to make the *config target
523
524# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
525# KBUILD_DEFCONFIG may point out an alternative default configuration
526# used for 'make defconfig'
Masahiro Yamadaa436bb72015-03-27 20:43:36 +0900527include arch/$(SRCARCH)/Makefile
Masahiro Yamada315bab42018-06-08 09:21:43 +0900528export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100530config: scripts_basic outputmakefile FORCE
Sam Ravnborg31110eb2008-12-13 23:00:45 +0100531 $(Q)$(MAKE) $(build)=scripts/kconfig $@
532
533%config: scripts_basic outputmakefile FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 $(Q)$(MAKE) $(build)=scripts/kconfig $@
535
536else
537# ===========================================================================
538# Build targets only - this includes vmlinux, arch specific targets, clean
539# targets and others. In general all targets except *config targets.
540
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +0900541# If building an external module we do not care about the all: rule
542# but instead _all depend on modules
543PHONY += all
544ifeq ($(KBUILD_EXTMOD),)
545_all: all
546else
547_all: modules
548endif
549
550# Decide whether to build built-in, modular, or both.
551# Normally, just do built-in.
552
553KBUILD_MODULES :=
554KBUILD_BUILTIN := 1
555
556# If we have only "make modules", don't compile built-in objects.
557# When we're building modules with modversions, we need to consider
558# the built-in objects during the descend as well, in order to
559# make sure the checksums are up to date before we record them.
560
561ifeq ($(MAKECMDGOALS),modules)
562 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
563endif
564
565# If we have "make <whatever> modules", compile modules
566# in addition to whatever we do anyway.
567# Just "make" or "make all" shall build modules as well
568
569ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
570 KBUILD_MODULES := 1
571endif
572
573ifeq ($(MAKECMDGOALS),)
574 KBUILD_MODULES := 1
575endif
576
577export KBUILD_MODULES KBUILD_BUILTIN
578
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579ifeq ($(KBUILD_EXTMOD),)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580# Objects we will link into vmlinux / subdirs we need to visit
581init-y := init/
Markus Trippelsdorfdf85b2d2017-09-16 11:01:16 +0200582drivers-y := drivers/ sound/ firmware/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583net-y := net/
584libs-y := lib/
585core-y := usr/
Feng Wu37d9fe42015-09-22 16:47:29 +0800586virt-y := virt/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587endif # KBUILD_EXTMOD
588
589ifeq ($(dot-config),1)
Masahiro Yamada0a16d2e2018-07-20 16:46:32 +0900590include include/config/auto.conf
Masahiro Yamada315bab42018-06-08 09:21:43 +0900591endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592
Masahiro Yamada315bab42018-06-08 09:21:43 +0900593# The all: target is the default when no target is given on the
594# command line.
595# This allow a user to issue only 'make' to build a kernel including modules
596# Defaults to vmlinux, but the arch makefile usually adds further targets
597all: vmlinux
598
599CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
600 $(call cc-option,-fno-tree-loop-im) \
601 $(call cc-disable-warning,maybe-uninitialized,)
Masahiro Yamada5aadfde2018-05-28 18:22:04 +0900602export CFLAGS_GCOV
Masahiro Yamada315bab42018-06-08 09:21:43 +0900603
Paulo Zanonib1f4ff72018-09-10 10:59:56 -0700604# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
605ifdef CONFIG_FUNCTION_TRACER
606 CC_FLAGS_FTRACE := -pg
607endif
608
Masahiro Yamada315bab42018-06-08 09:21:43 +0900609# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
610# values of the respective KBUILD_* variables
611ARCH_CPPFLAGS :=
612ARCH_AFLAGS :=
613ARCH_CFLAGS :=
614include arch/$(SRCARCH)/Makefile
615
616ifeq ($(dot-config),1)
Masahiro Yamadad7942412018-07-20 16:46:34 +0900617ifeq ($(may-sync-config),1)
Masahiro Yamada315bab42018-06-08 09:21:43 +0900618# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
619# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
620# because some architectures define CROSS_COMPILE there.
Masahiro Yamada98bdd332019-05-12 11:13:48 +0900621include include/config/auto.conf.cmd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623# To avoid any implicit rule to kick in, define an empty command
Masahiro Yamada638ecaf2019-02-22 16:40:10 +0900624$(KCONFIG_CONFIG): ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
Ulf Magnusson61277982018-02-13 08:58:20 +0100626# The actual configuration files used during the build are stored in
627# include/generated/ and include/config/. Update them if .config is newer than
628# include/config/auto.conf (which mirrors .config).
Masahiro Yamada638ecaf2019-02-22 16:40:10 +0900629#
630# This exploits the 'multi-target pattern rule' trick.
631# The syncconfig should be executed only once to make all the targets.
632%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG)
Masahiro Yamada911a91c2018-03-01 15:34:37 +0900633 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634else
Masahiro Yamadad7942412018-07-20 16:46:34 +0900635# External modules and some install targets need include/generated/autoconf.h
636# and include/config/auto.conf but do not care if they are up-to-date.
637# Use auto.conf to trigger the test
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200638PHONY += include/config/auto.conf
639
640include/config/auto.conf:
Sam Ravnborg264a2682009-10-18 00:49:24 +0200641 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
Michal Marek5369f552012-07-07 23:04:40 +0200642 echo >&2; \
643 echo >&2 " ERROR: Kernel configuration is invalid."; \
644 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
645 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
646 echo >&2 ; \
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200647 /bin/false)
648
Masahiro Yamadad7942412018-07-20 16:46:34 +0900649endif # may-sync-config
Sam Ravnborg9ee4e332006-08-07 21:01:36 +0200650endif # $(dot-config)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200652KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
Linus Torvaldsef6000b2016-10-12 10:23:41 -0700653KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
Linus Torvaldsbd664f62017-07-12 19:25:47 -0700654KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
655KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
656KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
Linus Torvalds76343a12019-05-01 11:05:41 -0700657KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
Geert Uytterhoevena1c48bb2014-05-27 09:54:12 +0200658
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
Matthias Kaehlckec21bcc22019-04-23 12:04:23 -0700660KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661else
Arnd Bergmann815eb712016-04-25 17:35:28 +0200662ifdef CONFIG_PROFILE_ALL_BRANCHES
Arnd Bergmanna76bcf52016-11-10 17:44:44 +0100663KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
Arnd Bergmann815eb712016-04-25 17:35:28 +0200664else
665KBUILD_CFLAGS += -O2
666endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667endif
668
Arnd Bergmanna76bcf52016-11-10 17:44:44 +0100669KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
670 $(call cc-disable-warning,maybe-uninitialized,))
671
Jiri Kosina69102312014-08-06 16:08:43 -0700672# Tell gcc to never replace conditional load with a non-conditional one
673KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
674
Victor Chibotarud677a4d2017-11-17 15:30:50 -0800675include scripts/Makefile.kcov
Emese Revfy6b90bd42016-05-24 00:09:38 +0200676include scripts/Makefile.gcc-plugins
677
Andi Kleen1873e872012-03-28 11:51:18 -0700678ifdef CONFIG_READABLE_ASM
679# Disable optimizations that make assembler listings hard to read.
680# reorder blocks reorders the control in the function
681# ipa clone creates specialized cloned functions
682# partial inlining inlines only parts of functions
683KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
684 $(call cc-option,-fno-ipa-cp-clone,) \
685 $(call cc-option,-fno-partial-inlining)
686endif
687
Mike Frysinger08f67462009-06-04 16:29:08 -0700688ifneq ($(CONFIG_FRAME_WARN),0)
Andi Kleen35bb5b12008-02-22 15:15:03 +0100689KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
690endif
691
Masahiro Yamada2a61f472018-05-28 18:22:00 +0900692stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
Linus Torvalds050e9ba2018-06-14 12:21:18 +0900693stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
694stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
Masahiro Yamada2a61f472018-05-28 18:22:00 +0900695
696KBUILD_CFLAGS += $(stackp-flags-y)
Sam Ravnborge06b8b92008-02-13 22:43:28 +0100697
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900698ifeq ($(cc-name),clang)
699KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900700KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
701KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900702# Quiet clang warning: comparison of unsigned expression < 0 is always false
703KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
704# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
705# source of a reference will be _MergedGlobals and not on of the whitelisted names.
706# See modpost pattern 2
707KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
708KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900709else
710
711# These warnings generated too much noise in a regular build.
712# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
713KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
Masahiro Yamadacfe17c92017-11-27 21:15:13 +0900714endif
715
Sodagudi Prasad0a5f4172018-02-06 15:46:51 -0800716KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717ifdef CONFIG_FRAME_POINTER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200718KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719else
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100720# Some targets (ARM with Thumb2, for example), can't be built with frame
721# pointers. For those, we don't have FUNCTION_TRACER automatically
722# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
723# incompatible with -fomit-frame-pointer with current GCC, so we don't use
724# -fomit-frame-pointer with FUNCTION_TRACER.
725ifndef CONFIG_FUNCTION_TRACER
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200726KBUILD_CFLAGS += -fomit-frame-pointer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727endif
Rabin Vincent7e9501f2010-08-10 19:20:53 +0100728endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729
Linus Torvalds2062afb2014-07-26 14:52:01 -0700730KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
731
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732ifdef CONFIG_DEBUG_INFO
Andi Kleen866ced92014-07-30 20:50:18 +0200733ifdef CONFIG_DEBUG_INFO_SPLIT
734KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
735else
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200736KBUILD_CFLAGS += -g
Andi Kleen866ced92014-07-30 20:50:18 +0200737endif
Behan Webster22883282014-02-14 15:19:17 -0800738KBUILD_AFLAGS += -Wa,-gdwarf-2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739endif
Andi Kleenbfaf2dd2014-07-30 20:50:19 +0200740ifdef CONFIG_DEBUG_INFO_DWARF4
741KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
742endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200744ifdef CONFIG_DEBUG_INFO_REDUCED
Andi Kleene82c4bb2013-02-07 13:58:40 -0800745KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
746 $(call cc-option,-fno-var-tracking)
Andi Kleend6f4ceb2010-07-14 15:43:52 +0200747endif
748
Steven Rostedt606576c2008-10-06 19:06:12 -0400749ifdef CONFIG_FUNCTION_TRACER
Vasily Gorbik07d04082018-08-06 15:17:44 +0200750ifdef CONFIG_FTRACE_MCOUNT_RECORD
751 # gcc 5 supports generating the mcount tables directly
752 ifeq ($(call cc-option-yn,-mrecord-mcount),y)
753 CC_FLAGS_FTRACE += -mrecord-mcount
754 export CC_USING_RECORD_MCOUNT := 1
755 endif
Vasily Gorbik2f4df002018-08-06 15:17:46 +0200756 ifdef CONFIG_HAVE_NOP_MCOUNT
757 ifeq ($(call cc-option-yn, -mnop-mcount),y)
758 CC_FLAGS_FTRACE += -mnop-mcount
759 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
760 endif
761 endif
Steven Rostedta2546fa2011-02-09 13:15:59 -0500762endif
Steven Rostedta2546fa2011-02-09 13:15:59 -0500763ifdef CONFIG_HAVE_FENTRY
Vasily Gorbikf28bc3c2018-08-06 15:17:42 +0200764 ifeq ($(call cc-option-yn, -mfentry),y)
765 CC_FLAGS_FTRACE += -mfentry
766 CC_FLAGS_USING += -DCC_USING_FENTRY
767 endif
Steven Rostedta2546fa2011-02-09 13:15:59 -0500768endif
Vasily Gorbikf28bc3c2018-08-06 15:17:42 +0200769export CC_FLAGS_FTRACE
770KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
771KBUILD_AFLAGS += $(CC_FLAGS_USING)
Steven Rostedt72441cb2010-10-13 17:12:30 -0400772ifdef CONFIG_DYNAMIC_FTRACE
Steven Rostedtcf4db252010-10-14 23:32:44 -0400773 ifdef CONFIG_HAVE_C_RECORDMCOUNT
Steven Rostedt72441cb2010-10-13 17:12:30 -0400774 BUILD_C_RECORDMCOUNT := y
775 export BUILD_C_RECORDMCOUNT
776 endif
777endif
Arnaldo Carvalho de Melo16444a82008-05-12 21:20:42 +0200778endif
779
Sam Ravnborg91341d42008-01-21 21:31:44 +0100780# We trigger additional mismatches with less inlining
781ifdef CONFIG_DEBUG_SECTION_MISMATCH
782KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
783endif
784
Masahiro Yamada90ad4052017-04-14 15:17:26 +0900785ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
Masahiro Yamadae85d1d62018-08-22 22:51:09 +0900786KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
787LDFLAGS_vmlinux += --gc-sections
Masahiro Yamada90ad4052017-04-14 15:17:26 +0900788endif
789
Sam Ravnborge8e69932005-04-30 16:51:42 -0700790# arch Makefile may override CC so keep this after arch Makefile is included
Masahiro Yamadae08d6de2018-05-28 18:21:38 +0900791NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
Sam Ravnborge8e69932005-04-30 16:51:42 -0700792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793# warn about C99 declaration after statement
Sam Ravnborga0f97e02007-10-14 22:21:35 +0200794KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200796# disable pointer signed / unsigned warnings in gcc 4.0
Michal Marek8417da6f2011-05-02 12:51:15 +0200797KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
Stephen Rothwell217c3e02018-08-31 07:47:28 +1000799# disable stringop warnings in gcc 8+
800KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
801
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +0400802# disable invalid "can't wrap" optimizations for signed / pointers
Linus Torvaldsa1378022009-07-12 11:25:04 -0700803KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
Linus Torvaldsd0115552009-03-19 15:53:19 -0700804
Daniel Borkmann87e0d4f2018-03-21 01:18:24 +0100805# clang sets -fmerge-all-constants by default as optimization, but this
806# is non-conforming behavior for C and in fact breaks the kernel, so we
807# need to disable it here generally.
808KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants)
809
810# for gcc -fno-merge-all-constants disables everything, but it is fine
811# to have actual conforming behavior enabled.
812KBUILD_CFLAGS += $(call cc-option,-fmerge-constants)
813
Linus Torvalds3ce120b2017-12-29 17:34:43 -0800814# Make sure -fstack-check isn't enabled (like gentoo apparently did)
815KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
816
Andi Kleen8f7f5c92009-09-18 12:49:37 -0700817# conserve stack if available
818KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
819
Sergei Trofimovich80970472013-09-13 14:51:40 -0700820# disallow errors like 'EXPORT_GPL(foo);' with missing header
821KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
822
823# require functions to have arguments in prototypes, not empty 'int foo()'
824KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
825
Josh Triplettfe7c36c2013-12-23 13:56:06 -0800826# Prohibit date/time macros, which would make the build non-deterministic
827KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
828
Daniel Wagnerea8daa72016-03-08 09:29:09 +0100829# enforce correct pointer usage
830KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
831
Kees Cookc834f0e2017-03-20 17:14:11 -0700832# Require designated initializers for all marked structures
833KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
834
Masahiro Yamadaa73619a2018-03-30 13:15:26 +0900835# change __FILE__ to the relative path from the srctree
836KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
837
Seth Forsheeb17eae52019-07-17 11:06:26 -0500838# ensure -fcf-protection is disabled when using retpoline as it is
839# incompatible with -mindirect-branch=thunk-extern
840ifdef CONFIG_RETPOLINE
841KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
842endif
843
Michal Marek40df7592011-04-20 13:45:30 +0200844# use the deterministic mode of AR if available
845KBUILD_ARFLAGS := $(call ar-option,D)
846
Masahiro Yamadaa436bb72015-03-27 20:43:36 +0900847include scripts/Makefile.kasan
848include scripts/Makefile.extrawarn
Andrey Ryabininc6d30852016-01-20 15:00:55 -0800849include scripts/Makefile.ubsan
Masahiro Yamadaa86fe352014-04-14 18:27:10 +0900850
Michal Marek61754c12015-07-01 17:19:30 +0200851# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
852# last assignments
853KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
854KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
855KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
Sam Ravnborg52bcc332007-10-15 22:03:58 +0200856
Roland McGrath18991192007-07-19 01:48:40 -0700857# Use --build-id when available.
Masahiro Yamada0da4fab2018-02-23 13:56:52 +0900858LDFLAGS_BUILD_ID := $(call ld-option, --build-id)
Sam Ravnborg65881692010-07-28 17:33:09 +0200859KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
Roland McGrath18991192007-07-19 01:48:40 -0700860LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
861
David Howells5d7d18f2009-03-04 11:59:07 -0800862ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
Andi Kleend79a2712009-09-16 22:36:55 +0200863LDFLAGS_vmlinux += $(call ld-option, -X,)
David Howells5d7d18f2009-03-04 11:59:07 -0800864endif
865
Luc Van Oostenryck14516762018-05-28 20:27:35 +0200866# insure the checker run with the right endianness
867CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
868
Luc Van Oostenryck1f2f01b2018-05-30 22:48:38 +0200869# the checker needs the correct machine size
870CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
871
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872# Default kernel image to build when no specific target is given.
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200873# KBUILD_IMAGE may be overruled on the command line or
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874# set in the environment
875# Also any assignments in arch/$(ARCH)/Makefile take precedence over
876# this default value
877export KBUILD_IMAGE ?= vmlinux
878
879#
880# INSTALL_PATH specifies where to place the updated kernel and system map
881# images. Default is /boot, but you can set it to other values
882export INSTALL_PATH ?= /boot
883
884#
Jason Cooperf4d4ffc2013-12-01 23:56:28 +0000885# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
886# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
887# an argument if needed. Otherwise it defaults to the kernel install path
888#
889export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
890
891#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
893# relocations required by build roots. This is not defined in the
Sam Ravnborg070b98b2006-06-25 00:07:55 +0200894# makefile but the argument can be passed to make if needed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895#
896
Sam Ravnborgdf9df032006-01-16 12:46:07 +0100897MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898export MODLIB
899
Theodore Ts'oac031f22006-06-21 20:53:09 -0400900#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +0900901# INSTALL_MOD_STRIP, if defined, will cause modules to be
902# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
903# the default option --strip-debug will be used. Otherwise,
904# INSTALL_MOD_STRIP value will be used as the options to the strip command.
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100905
Theodore Ts'oac031f22006-06-21 20:53:09 -0400906ifdef INSTALL_MOD_STRIP
907ifeq ($(INSTALL_MOD_STRIP),1)
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100908mod_strip_cmd = $(STRIP) --strip-debug
Theodore Ts'oac031f22006-06-21 20:53:09 -0400909else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100910mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
Theodore Ts'oac031f22006-06-21 20:53:09 -0400911endif # INSTALL_MOD_STRIP=1
912else
Sam Ravnborg2ea03892009-01-14 21:38:20 +0100913mod_strip_cmd = true
Theodore Ts'oac031f22006-06-21 20:53:09 -0400914endif # INSTALL_MOD_STRIP
915export mod_strip_cmd
916
Bertrand Jacquinbeb50df2014-08-27 20:31:56 +0930917# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
918# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
919# or CONFIG_MODULE_COMPRESS_XZ.
920
921mod_compress_cmd = true
922ifdef CONFIG_MODULE_COMPRESS
923 ifdef CONFIG_MODULE_COMPRESS_GZIP
Jason A. Donenfeld3d1450d2015-07-07 20:26:07 +0200924 mod_compress_cmd = gzip -n -f
Bertrand Jacquinbeb50df2014-08-27 20:31:56 +0930925 endif # CONFIG_MODULE_COMPRESS_GZIP
926 ifdef CONFIG_MODULE_COMPRESS_XZ
Jason A. Donenfeld3d1450d2015-07-07 20:26:07 +0200927 mod_compress_cmd = xz -f
Bertrand Jacquinbeb50df2014-08-27 20:31:56 +0930928 endif # CONFIG_MODULE_COMPRESS_XZ
929endif # CONFIG_MODULE_COMPRESS
930export mod_compress_cmd
931
P J P1bf49dd2013-11-12 15:11:44 -0800932# Select initial ramdisk compression format, default is gzip(1).
933# This shall be used by the dracut(8) tool while creating an initramfs image.
934#
Jan Beulich7ac18152013-12-18 17:08:57 -0800935INITRD_COMPRESS-y := gzip
936INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
937INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
938INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
939INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
940INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
Linus Torvaldsb7000ad2013-12-20 16:52:45 -0800941# do not export INITRD_COMPRESS, since we didn't actually
942# choose a sane default compression above.
943# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
Michal Marekd9d8d7e2013-01-25 13:41:31 +1030945ifdef CONFIG_MODULE_SIG_ALL
David Woodhouse3ee550f2015-08-14 16:17:16 +0100946$(eval $(call config_filename,MODULE_SIG_KEY))
947
948mod_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 +1030949else
950mod_sign_cmd = true
951endif
952export mod_sign_cmd
953
Rolf Eike Beer0603e3a2019-03-26 12:48:39 -0500954HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
955
Josh Poimboeuf9f0c18a2017-02-15 12:21:17 -0600956ifdef CONFIG_STACK_VALIDATION
957 has_libelf := $(call try-run,\
Rolf Eike Beer0603e3a2019-03-26 12:48:39 -0500958 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
Josh Poimboeuf9f0c18a2017-02-15 12:21:17 -0600959 ifeq ($(has_libelf),1)
960 objtool_target := tools/objtool FORCE
961 else
Josh Poimboeuf9f0c18a2017-02-15 12:21:17 -0600962 SKIP_STACK_VALIDATION := 1
963 export SKIP_STACK_VALIDATION
964 endif
965endif
966
Rusty Russelle2a666d2012-10-19 11:53:15 +1030967
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968ifeq ($(KBUILD_EXTMOD),)
David Howellscfc411e2015-08-14 15:20:41 +0100969core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970
971vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
972 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
Feng Wu37d9fe42015-09-22 16:47:29 +0800973 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974
975vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
Feng Wu37d9fe42015-09-22 16:47:29 +0800976 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977
Nicholas Pigginf49821e2018-02-11 00:25:04 +1000978init-y := $(patsubst %/, %/built-in.a, $(init-y))
979core-y := $(patsubst %/, %/built-in.a, $(core-y))
980drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y))
981net-y := $(patsubst %/, %/built-in.a, $(net-y))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
Nicholas Pigginf49821e2018-02-11 00:25:04 +1000983libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
984virt-y := $(patsubst %/, %/built-in.a, $(virt-y))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200986# Externally visible symbols (used by link-vmlinux.sh)
Sam Ravnborg95698572012-05-05 10:18:40 +0200987export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
Nicholas Piggin3a166fc2017-06-20 01:52:05 +1000988export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
989export KBUILD_VMLINUX_LIBS := $(libs-y1)
Sam Ravnborg95698572012-05-05 10:18:40 +0200990export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200991export LDFLAGS_vmlinux
Cao jin312a3d02017-08-02 10:31:06 +0800992# used by scripts/package/Makefile
Feng Wu37d9fe42015-09-22 16:47:29 +0800993export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
Nicholas Piggin3a166fc2017-06-20 01:52:05 +1000995vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996
Masahiro Yamada3fdc7d32018-03-16 16:37:15 +0900997# Recurse until adjust_autoksyms.sh is satisfied
998PHONY += autoksyms_recursive
999autoksyms_recursive: $(vmlinux-deps)
Nicolas Pitre2441e782016-04-22 15:25:00 -04001000ifdef CONFIG_TRIM_UNUSED_KSYMS
Nicolas Ferreba79d402016-04-25 17:55:08 +02001001 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
Nicolas Pitre86556392016-12-02 15:11:50 -05001002 "$(MAKE) -f $(srctree)/Makefile vmlinux"
Nicolas Pitre2441e782016-04-22 15:25:00 -04001003endif
Nicolas Pitre23121ca2016-01-26 21:50:18 -05001004
Masahiro Yamada1f50b802018-03-16 16:37:13 +09001005# For the kernel to actually contain only the needed exported symbols,
1006# we have to build modules as well to determine what those symbols are.
1007# (this can be evaluated only once include/config/auto.conf has been included)
1008ifdef CONFIG_TRIM_UNUSED_KSYMS
1009 KBUILD_MODULES := 1
1010endif
1011
Masahiro Yamada07a422b2018-03-16 16:37:12 +09001012autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1013
1014$(autoksyms_h):
1015 $(Q)mkdir -p $(dir $@)
1016 $(Q)touch $@
Nicolas Pitre23121ca2016-01-26 21:50:18 -05001017
Nicholas Pigginfbe6e372016-08-24 22:29:21 +10001018ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1019
1020# Final link of vmlinux with optional arch pass after final link
Cao jin312a3d02017-08-02 10:31:06 +08001021cmd_link-vmlinux = \
Masahiro Yamadad503ac52018-08-24 08:20:39 +09001022 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \
Nicholas Pigginfbe6e372016-08-24 22:29:21 +10001023 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
Nicolas Pitre2441e782016-04-22 15:25:00 -04001024
Masahiro Yamada3fdc7d32018-03-16 16:37:15 +09001025vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1026ifdef CONFIG_HEADERS_CHECK
1027 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
1028endif
1029ifdef CONFIG_GDB_SCRIPTS
1030 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1031endif
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +02001032 +$(call if_changed,link-vmlinux)
Sam Ravnborg741f98f2007-07-17 10:54:06 +02001033
Masahiro Yamada3fca1702018-08-08 11:14:14 +09001034# Build samples along the rest of the kernel. This needs headers_install.
Nicolas Pitredd924782016-02-28 22:00:00 -05001035ifdef CONFIG_SAMPLES
1036vmlinux-dirs += samples
Masahiro Yamada3fca1702018-08-08 11:14:14 +09001037samples: headers_install
Nicolas Pitredd924782016-02-28 22:00:00 -05001038endif
1039
Masahiro Yamada38385f82014-04-28 16:26:18 +09001040# The actual objects are generated when descending,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041# make sure no implicit rule kicks in
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +02001042$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043
1044# Handle descending into subdirectories listed in $(vmlinux-dirs)
1045# Preset locale variables to speed up the build process. Limit locale
1046# tweaks to this spot to avoid wrong language settings when running
1047# make menuconfig etc.
1048# Error messages still appears in the original language
1049
Paul Smith4f193362006-03-05 17:14:10 -05001050PHONY += $(vmlinux-dirs)
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001051$(vmlinux-dirs): prepare scripts
Masahiro Yamadaf7adc312017-11-08 01:31:46 +09001052 $(Q)$(MAKE) $(build)=$@ need-builtin=1
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053
Michal Marek0d0e7712013-07-11 15:34:51 +02001054define filechk_kernel.release
1055 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1056endef
1057
Geert Uytterhoeven83a35e32013-06-28 11:27:31 +02001058# Store (new) KERNELRELEASE string in include/config/kernel.release
Masahiro Yamada20639452018-07-20 16:46:36 +09001059include/config/kernel.release: $(srctree)/Makefile FORCE
Michal Marek0d0e7712013-07-11 15:34:51 +02001060 $(call filechk,kernel.release)
Sam Ravnborgcb584552006-01-09 21:20:34 +01001061
Masahiro Yamadad8821622018-03-16 16:37:11 +09001062# Additional helpers built in scripts/
1063# Carefully list dependencies so we do not try to build scripts twice
1064# in parallel
1065PHONY += scripts
Masahiro Yamada20639452018-07-20 16:46:36 +09001066scripts: scripts_basic asm-generic gcc-plugins $(autoksyms_h)
Masahiro Yamadad8821622018-03-16 16:37:11 +09001067 $(Q)$(MAKE) $(build)=$(@)
Sam Ravnborgcb584552006-01-09 21:20:34 +01001068
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069# Things we need to do before we recursively start building the kernel
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001070# or the modules are listed in "prepare".
1071# A multi level approach is used. prepareN is processed before prepareN-1.
1072# archprepare is used in arch Makefiles and when processed asm symlink,
1073# version.h and scripts_basic is processed / created.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001075# Listed in dependency order
Paul Smith4f193362006-03-05 17:14:10 -05001076PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001077
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001078# prepare3 is used to check if we are building in a separate output directory,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079# and if so do:
1080# 1) Check that make has not been executed in the kernel src $(srctree)
Roman Zippelf1d28fb2006-06-08 22:12:43 -07001081prepare3: include/config/kernel.release
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082ifneq ($(KBUILD_SRC),)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001083 @$(kecho) ' Using $(srctree) as source for kernel'
Roman Zippelc955cca2006-06-08 22:12:39 -07001084 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
Michal Marek5369f552012-07-07 23:04:40 +02001085 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
1086 echo >&2 " in the '$(srctree)' directory.";\
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 /bin/false; \
1088 fi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089endif
1090
Kees Cookc965b102016-07-26 15:21:17 -07001091# prepare2 creates a makefile if using a separate output directory.
1092# From this point forward, .config has been reprocessed, so any rules
1093# that need to depend on updated CONFIG_* values can be checked here.
Masahiro Yamada2a61f472018-05-28 18:22:00 +09001094prepare2: prepare3 outputmakefile asm-generic
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095
Masahiro Yamada20639452018-07-20 16:46:36 +09001096prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001097 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
H. Peter Anvin6520fe52012-05-08 21:22:24 +03001099archprepare: archheaders archscripts prepare1 scripts_basic
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001100
Emese Revfy6b90bd42016-05-24 00:09:38 +02001101prepare0: archprepare gcc-plugins
Sam Ravnborg8d36a622005-09-10 21:05:36 +02001102 $(Q)$(MAKE) $(build)=.
Sam Ravnborg86feeaa2005-09-09 19:28:28 +02001103
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104# All the preparing..
Josh Poimboeufb9ab5eb2016-02-28 22:22:42 -06001105prepare: prepare0 prepare-objtool
1106
Masahiro Yamada2c1f4f12017-10-04 12:56:06 +09001107# Support for using generic headers in asm-generic
1108PHONY += asm-generic uapi-asm-generic
1109asm-generic: uapi-asm-generic
1110 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1111 src=asm obj=arch/$(SRCARCH)/include/generated/asm
1112uapi-asm-generic:
1113 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1114 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
1115
Josh Poimboeufb9ab5eb2016-02-28 22:22:42 -06001116PHONY += prepare-objtool
Josh Poimboeuf3b27a0c2016-03-03 11:39:30 -06001117prepare-objtool: $(objtool_target)
Masahiro Yamadaae206a12018-12-18 14:25:41 +09001118ifeq ($(SKIP_STACK_VALIDATION),1)
1119ifdef CONFIG_UNWINDER_ORC
1120 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1121 @false
1122else
1123 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1124endif
1125endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127# Generate some files
1128# ---------------------------------------------------------------------------
1129
1130# KERNELRELEASE can change from a few different places, meaning version.h
1131# needs to be updated, so this check is forced on all builds
1132
1133uts_len := 64
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001134define filechk_utsrelease.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001136 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1137 exit 1; \
1138 fi; \
1139 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140endef
1141
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001142define filechk_version.h
Jesper Juhl450c6072012-02-16 22:49:15 +01001143 (echo \#define LINUX_VERSION_CODE $(shell \
1144 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001145 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1146endef
1147
Masahiro Yamada43fee2b2018-07-25 14:16:11 +09001148$(version_h): FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 $(call filechk,version.h)
Michal Marek223c24a2014-11-27 16:13:17 +01001150 $(Q)rm -f $(old_version_h)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151
Sam Ravnborg273b2812009-10-18 00:52:28 +02001152include/generated/utsrelease.h: include/config/kernel.release FORCE
Sam Ravnborg63104ee2006-07-03 23:30:54 +02001153 $(call filechk,utsrelease.h)
1154
Vegard Nossum179efcb2008-12-16 12:33:43 +01001155PHONY += headerdep
1156headerdep:
Peter Foley9663d982011-04-26 17:17:11 -04001157 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1158 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
Vegard Nossum179efcb2008-12-16 12:33:43 +01001159
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160# ---------------------------------------------------------------------------
David Woodhouse8d730cf2006-06-18 11:58:39 +01001161# Kernel headers
David Woodhouse8d730cf2006-06-18 11:58:39 +01001162
Sam Ravnborge6883b12008-06-05 16:43:46 +02001163#Default location for installed headers
1164export INSTALL_HDR_PATH = $(objtree)/usr
1165
Masahiro Yamada9d022c52017-10-04 12:56:04 +09001166# If we do an all arch process set dst to include/arch-$(SRCARCH)
1167hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include)
Sam Ravnborge6883b12008-06-05 16:43:46 +02001168
H. Peter Anvin052ad272011-11-17 13:17:35 -08001169PHONY += archheaders
1170archheaders:
1171
H. Peter Anvin6520fe52012-05-08 21:22:24 +03001172PHONY += archscripts
1173archscripts:
1174
Sam Ravnborge6883b12008-06-05 16:43:46 +02001175PHONY += __headers
Masahiro Yamadaa9d9a402017-07-10 03:32:59 +09001176__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
Mike Waychisone1b702c2011-03-14 23:34:25 -07001177 $(Q)$(MAKE) $(build)=scripts build_unifdef
David Woodhouse6d716272006-09-24 22:16:03 +01001178
1179PHONY += headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001180headers_install_all:
1181 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
David Woodhouse6d716272006-09-24 22:16:03 +01001182
David Woodhouse8d730cf2006-06-18 11:58:39 +01001183PHONY += headers_install
Sam Ravnborge6883b12008-06-05 16:43:46 +02001184headers_install: __headers
Masahiro Yamada9d022c52017-10-04 12:56:04 +09001185 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
David Howells10b63952012-10-02 18:01:57 +01001186 $(error Headers not exportable for the $(SRCARCH) architecture))
Masahiro Yamadaa8ff49a2017-07-10 03:32:35 +09001187 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
Masahiro Yamada9d022c52017-10-04 12:56:04 +09001188 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst)
David Woodhouse8d730cf2006-06-18 11:58:39 +01001189
Mike Frysinger1f857122007-02-14 00:33:02 -08001190PHONY += headers_check_all
1191headers_check_all: headers_install_all
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001192 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
Mike Frysinger1f857122007-02-14 00:33:02 -08001193
David Woodhouse68475352006-06-18 12:02:10 +01001194PHONY += headers_check
1195headers_check: headers_install
Masahiro Yamadaa8ff49a2017-07-10 03:32:35 +09001196 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
Masahiro Yamada9d022c52017-10-04 12:56:04 +09001197 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
David Woodhouse68475352006-06-18 12:02:10 +01001198
David Woodhouse8d730cf2006-06-18 11:58:39 +01001199# ---------------------------------------------------------------------------
Shuah Khan5a5da782014-08-07 13:07:46 -06001200# Kernel selftest
1201
1202PHONY += kselftest
1203kselftest:
Shuah Khan2bc84522017-09-06 16:44:35 -06001204 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
Shuah Khan5a5da782014-08-07 13:07:46 -06001205
Shuah Khan801d2e92017-08-18 15:54:41 -06001206PHONY += kselftest-clean
Wang Longdcb825a2015-10-08 02:41:18 +00001207kselftest-clean:
Shuah Khan2bc84522017-09-06 16:44:35 -06001208 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
Wang Longdcb825a2015-10-08 02:41:18 +00001209
Bamvor Jian Zhang3d6dee72016-01-08 15:27:34 +08001210PHONY += kselftest-merge
1211kselftest-merge:
1212 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1213 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1214 -m $(objtree)/.config \
1215 $(srctree)/tools/testing/selftests/*/config
1216 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1217
Shuah Khan5a5da782014-08-07 13:07:46 -06001218# ---------------------------------------------------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219# Modules
1220
1221ifdef CONFIG_MODULES
1222
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001223# By default, build modules as well
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
Michal Marek73d13932010-03-10 12:28:58 +01001225all: modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001227# Build modules
Tejun Heo551559e2007-12-07 21:04:30 +09001228#
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001229# A module can be listed more than once in obj-m resulting in
1230# duplicate lines in modules.order files. Those are removed
1231# using awk while concatenating to the final file.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232
Paul Smith4f193362006-03-05 17:14:10 -05001233PHONY += modules
Michal Marek2da30e72010-06-07 22:22:12 +02001234modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
Tejun Heo551559e2007-12-07 21:04:30 +09001235 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
Mike Frysingerfd54f502008-11-06 03:31:35 -05001236 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001237 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238
Michal Mareka6c36632010-03-08 10:07:12 +01001239modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1240 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1241
Masahiro Yamada20639452018-07-20 16:46:36 +09001242%/modules.builtin: include/config/auto.conf include/config/tristate.conf
Michal Mareka6c36632010-03-08 10:07:12 +01001243 $(Q)$(MAKE) $(modbuiltin)=$*
1244
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245
1246# Target to prepare building external modules
Paul Smith4f193362006-03-05 17:14:10 -05001247PHONY += modules_prepare
Sam Ravnborg5bb78262005-09-11 22:30:22 +02001248modules_prepare: prepare scripts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
1250# Target to install modules
Paul Smith4f193362006-03-05 17:14:10 -05001251PHONY += modules_install
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252modules_install: _modinst_ _modinst_post
1253
Paul Smith4f193362006-03-05 17:14:10 -05001254PHONY += _modinst_
Michal Marek2da30e72010-06-07 22:22:12 +02001255_modinst_:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 @rm -rf $(MODLIB)/kernel
1257 @rm -f $(MODLIB)/source
1258 @mkdir -p $(MODLIB)/kernel
Masahiro Yamada8e9b4662017-08-20 15:04:11 +09001259 @ln -s $(abspath $(srctree)) $(MODLIB)/source
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1261 rm -f $(MODLIB)/build ; \
Michal Marek7e1c0472014-04-25 17:29:45 +02001262 ln -s $(CURDIR) $(MODLIB)/build ; \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 fi
Tejun Heo551559e2007-12-07 21:04:30 +09001264 @cp -f $(objtree)/modules.order $(MODLIB)/
Michal Marekbc081dd2009-12-07 16:38:33 +01001265 @cp -f $(objtree)/modules.builtin $(MODLIB)/
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001266 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001268# This depmod is only for convenience to give the initial
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269# boot a modules.dep even before / is mounted read-write. However the
1270# boot script depmod is the master version.
Paul Smith4f193362006-03-05 17:14:10 -05001271PHONY += _modinst_post
Linus Torvalds6d128e12013-07-10 19:02:51 -07001272_modinst_post: _modinst_
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001273 $(call cmd,depmod)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274
Josh Boyerd890f512012-11-05 09:09:24 +10301275ifeq ($(CONFIG_MODULE_SIG), y)
1276PHONY += modules_sign
1277modules_sign:
1278 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1279endif
1280
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281else # CONFIG_MODULES
1282
1283# Modules not configured
1284# ---------------------------------------------------------------------------
1285
Masahiro Yamada612e47c2016-03-13 09:39:22 +09001286PHONY += modules modules_install
1287modules modules_install:
Michal Marek5369f552012-07-07 23:04:40 +02001288 @echo >&2
1289 @echo >&2 "The present kernel configuration has modules disabled."
1290 @echo >&2 "Type 'make config' and enable loadable module support."
1291 @echo >&2 "Then build a kernel with module support enabled."
1292 @echo >&2
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 @exit 1
1294
1295endif # CONFIG_MODULES
1296
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297###
1298# Cleaning is done on three levels.
1299# make clean Delete most generated files
1300# Leave enough to build external modules
1301# make mrproper Delete the current configuration, and all generated files
1302# make distclean Remove editor backup files, patch leftover files and the like
1303
1304# Directories & files removed with 'make clean'
Masahiro Yamadafbfa9be2018-03-16 16:37:14 +09001305CLEAN_DIRS += $(MODVERDIR) include/ksym
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
1307# Directories & files removed with 'make mrproper'
Sam Ravnborgd8ecc5c2011-04-27 22:29:49 +02001308MRPROPER_DIRS += include/config usr/include include/generated \
Masahiro Yamada3fbb43d2014-04-28 16:32:43 +09001309 arch/*/include/generated .tmp_objdiff
Masahiro Yamada278ae602017-09-22 14:31:13 +09001310MRPROPER_FILES += .config .config.old .version \
Rusty Russelld5b71932012-10-02 14:35:24 +09301311 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
David Woodhousefb117942015-07-20 21:16:30 +01001312 signing_key.pem signing_key.priv signing_key.x509 \
1313 x509.genkey extra_certificates signing_key.x509.keyid \
Jan Kiszka3ee7b3f2015-02-17 13:46:36 -08001314 signing_key.x509.signer vmlinux-gdb.py
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315
1316# clean - Delete most, but leave enough to build external modules
1317#
1318clean: rm-dirs := $(CLEAN_DIRS)
1319clean: rm-files := $(CLEAN_FILES)
Gerard Snitselaarfb68d4b2012-02-04 02:55:59 -07001320clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321
Pawel Mollbd1ee802012-10-29 11:23:02 +00001322PHONY += $(clean-dirs) clean archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323$(clean-dirs):
1324 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1325
Pawel Mollbd1ee802012-10-29 11:23:02 +00001326vmlinuxclean:
1327 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
Nicholas Pigginfbe6e372016-08-24 22:29:21 +10001328 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
Pawel Mollbd1ee802012-10-29 11:23:02 +00001329
1330clean: archclean vmlinuxclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331
1332# mrproper - Delete all generated files, including .config
1333#
1334mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1335mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
Mauro Carvalho Chehabcb43fb52017-05-14 11:50:01 -03001336mrproper-dirs := $(addprefix _mrproper_,scripts)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337
Paul Smith4f193362006-03-05 17:14:10 -05001338PHONY += $(mrproper-dirs) mrproper archmrproper
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339$(mrproper-dirs):
1340 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1341
1342mrproper: clean archmrproper $(mrproper-dirs)
1343 $(call cmd,rmdirs)
1344 $(call cmd,rmfiles)
1345
1346# distclean
1347#
Paul Smith4f193362006-03-05 17:14:10 -05001348PHONY += distclean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349
1350distclean: mrproper
1351 @find $(srctree) $(RCS_FIND_IGNORE) \
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001352 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
Masahiro Yamadaf78271d2017-01-22 23:02:32 +09001353 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1354 -o -name 'core' \) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 -type f -print | xargs rm -f
1356
1357
1358# Packaging of the kernel to various formats
1359# ---------------------------------------------------------------------------
Michal Marekc79624c2014-07-04 22:53:52 +02001360package-dir := scripts/package
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361
Arnaldo Carvalho de Melobafb6742010-06-07 07:44:25 -03001362%src-pkg: FORCE
1363 $(Q)$(MAKE) $(build)=$(package-dir) $@
Zach Brown031ecc62006-06-08 22:12:37 -07001364%pkg: include/config/kernel.release FORCE
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001365 $(Q)$(MAKE) $(build)=$(package-dir) $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366
1367
1368# Brief documentation of the typical targets used
1369# ---------------------------------------------------------------------------
1370
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001371boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
Konstantin Khlebnikova1e7b7b2014-10-28 17:18:20 +04001372boards := $(sort $(notdir $(boards)))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001373board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1374board-dirs := $(sort $(notdir $(board-dirs:/=)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375
Masahiro Yamadafe69b422016-03-13 09:39:55 +09001376PHONY += help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377help:
1378 @echo 'Cleaning targets:'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001379 @echo ' clean - Remove most generated files but keep the config and'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001380 @echo ' enough build support to build external modules'
Samuel Tardieu5ea084e2006-12-12 19:09:40 +01001381 @echo ' mrproper - Remove all generated files + config + various backup files'
Jesper Juhl5cc8d242006-09-24 14:01:08 +02001382 @echo ' distclean - mrproper + remove editor backup and patch files'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 @echo ''
1384 @echo 'Configuration targets:'
1385 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1386 @echo ''
1387 @echo 'Other generic targets:'
1388 @echo ' all - Build all targets marked with [*]'
1389 @echo '* vmlinux - Build the bare kernel'
1390 @echo '* modules - Build all modules'
Bodo Eggert9cc5d742005-11-23 20:11:34 +01001391 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 @echo ' dir/ - Build all files in dir and below'
Wang YanQing40ab87a2015-12-11 00:35:19 +08001393 @echo ' dir/file.[ois] - Build specified target only'
Vinícius Tinti433db3e2017-04-24 13:04:58 -07001394 @echo ' dir/file.ll - Build the LLVM assembly file'
1395 @echo ' (requires compiler support for LLVM assembly generation)'
Joe Perches62718972010-01-13 09:31:44 -08001396 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1397 @echo ' (requires a recent binutils and recent build (System.map))'
Sam Ravnborg155ad602005-07-07 17:56:08 -07001398 @echo ' dir/file.ko - Build module including final link'
Robert P. J. Dayc4d5ee62009-04-24 12:35:23 -04001399 @echo ' modules_prepare - Set up for building external modules'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 @echo ' tags/TAGS - Generate tags file for editors'
1401 @echo ' cscope - Generate cscope index'
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001402 @echo ' gtags - Generate GNU GLOBAL index'
Michal Marek3f1d9a62014-07-11 15:57:24 +02001403 @echo ' kernelrelease - Output the release version string (use with make -s)'
1404 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1405 @echo ' image_name - Output the image name (use with make -s)'
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001406 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
Geert Uytterhoeven59df3232007-01-29 13:47:01 +01001407 echo ' (default: $(INSTALL_HDR_PATH))'; \
Sam Ravnborg2fb9b1b2008-06-21 00:24:17 +02001408 echo ''
Randy Dunlap31b8cc82017-05-08 15:55:08 -07001409 @echo 'Static analysers:'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 @echo ' checkstack - Generate a list of stack hogs'
1411 @echo ' namespacecheck - Name space analysis on compiled kernel'
Sam Ravnborgaa025e72007-11-14 21:34:55 +01001412 @echo ' versioncheck - Sanity check on version.h usage'
Randy Dunlapec2d9872007-11-04 12:01:55 -08001413 @echo ' includecheck - Check for duplicate included header files'
Adrian Bunk295ac052007-08-24 23:04:56 +02001414 @echo ' export_report - List the usages of all exported symbols'
Vegard Nossum179efcb2008-12-16 12:33:43 +01001415 @echo ' headers_check - Sanity check on exported headers'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001416 @echo ' headerdep - Detect inclusion cycles in headers'
Masahiro Yamada7f855fc82017-11-14 18:47:20 +09001417 @echo ' coccicheck - Check with Coccinelle'
Nicolas Palix74425ee2010-06-06 17:15:01 +02001418 @echo ''
Randy Dunlap31b8cc82017-05-08 15:55:08 -07001419 @echo 'Kernel selftest:'
Shuah Khan5a5da782014-08-07 13:07:46 -06001420 @echo ' kselftest - Build and run kernel selftest (run as root)'
1421 @echo ' Build, install, and boot kernel before'
1422 @echo ' running kselftest on it'
Wang Longdcb825a2015-10-08 02:41:18 +00001423 @echo ' kselftest-clean - Remove all generated kselftest files'
Randy Dunlapbbfe63b2017-10-06 17:17:52 -07001424 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
Bamvor Jian Zhang3d6dee72016-01-08 15:27:34 +08001425 @echo ' .config.'
Shuah Khan5a5da782014-08-07 13:07:46 -06001426 @echo ''
Randy Dunlap31b8cc82017-05-08 15:55:08 -07001427 @echo 'Userspace tools targets:'
1428 @echo ' use "make tools/help"'
1429 @echo ' or "cd tools; make help"'
1430 @echo ''
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 @echo 'Kernel packaging:'
Sam Ravnborg6c2133e2006-03-21 07:22:35 +01001432 @$(MAKE) $(build)=$(package-dir) help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433 @echo ''
1434 @echo 'Documentation targets:'
Mauro Carvalho Chehabcb43fb52017-05-14 11:50:01 -03001435 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436 @echo ''
Andres Salomon01dee182008-04-25 22:34:58 -04001437 @echo 'Architecture specific targets ($(SRCARCH)):'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438 @$(if $(archhelp),$(archhelp),\
Andres Salomon01dee182008-04-25 22:34:58 -04001439 echo ' No architecture specific help defined for $(SRCARCH)')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440 @echo ''
1441 @$(if $(boards), \
1442 $(foreach b, $(boards), \
1443 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1444 echo '')
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001445 @$(if $(board-dirs), \
1446 $(foreach b, $(board-dirs), \
1447 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1448 printf " %-16s - Show all of the above\\n" help-boards; \
1449 echo '')
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
1451 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
Sam Ravnborg45d506b2006-08-08 21:35:14 +02001452 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
Cao jin9ba26a72017-06-06 17:07:53 +08001454 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
Dustin Kirkland701842e2006-05-23 15:57:23 -05001455 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
Ingo Molnaraf07ce32011-06-16 13:26:23 +02001456 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
Sam Ravnborg28bc20d2011-04-27 22:15:27 +02001457 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1458 @echo ' 1: warnings which may be relevant and do not occur too often'
1459 @echo ' 2: warnings which occur quite often but may still be relevant'
1460 @echo ' 3: more obscure warnings, can most likely be ignored'
Michal Mareka6de5532011-04-29 14:45:31 +02001461 @echo ' Multiple levels can be combined with W=12 or W=123'
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 @echo ''
1463 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1464 @echo 'For further info see the ./README file'
1465
1466
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001467help-board-dirs := $(addprefix help-,$(board-dirs))
1468
1469help-boards: $(help-board-dirs)
1470
Michal Marekfbae4d52014-11-28 13:31:43 +01001471boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
Segher Boessenkool5dffbe82008-04-06 22:16:07 +02001472
1473$(help-board-dirs): help-%:
1474 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1475 @$(if $(boards-per-dir), \
1476 $(foreach b, $(boards-per-dir), \
1477 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1478 echo '')
1479
1480
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481# Documentation targets
1482# ---------------------------------------------------------------------------
Jani Nikulae8939222017-10-09 18:26:15 +03001483DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1484 linkcheckdocs dochelp refcheckdocs
Jani Nikula22cba312016-05-19 15:14:05 +03001485PHONY += $(DOC_TARGETS)
1486$(DOC_TARGETS): scripts_basic FORCE
Mauro Carvalho Chehabcb43fb52017-05-14 11:50:01 -03001487 $(Q)$(MAKE) $(build)=Documentation $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488
1489else # KBUILD_EXTMOD
1490
1491###
1492# External module support.
1493# When building external modules the kernel used as basis is considered
1494# read-only, and no consistency checks are made and the make
1495# system is not used on the basis kernel. If updates are required
1496# in the basis kernel ordinary make commands (without M=...) must
1497# be used.
1498#
1499# The following are the only valid targets when building external
1500# modules.
1501# make M=dir clean Delete all automatically generated files
1502# make M=dir modules Make all modules in specified dir
1503# make M=dir Same as 'make M=dir modules'
1504# make M=dir modules_install
Sam Ravnborg070b98b2006-06-25 00:07:55 +02001505# Install the modules built in the module directory
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506# Assumes install directory is already created
1507
1508# We are always building modules
1509KBUILD_MODULES := 1
Paul Smith4f193362006-03-05 17:14:10 -05001510PHONY += crmodverdir
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511crmodverdir:
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001512 $(cmd_crmodverdir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513
Paul Smith4f193362006-03-05 17:14:10 -05001514PHONY += $(objtree)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515$(objtree)/Module.symvers:
1516 @test -e $(objtree)/Module.symvers || ( \
1517 echo; \
1518 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1519 echo " is missing; modules will have no dependencies and modversions."; \
1520 echo )
1521
1522module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
Paul Smith4f193362006-03-05 17:14:10 -05001523PHONY += $(module-dirs) modules
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524$(module-dirs): crmodverdir $(objtree)/Module.symvers
1525 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1526
1527modules: $(module-dirs)
Mike Frysingerfd54f502008-11-06 03:31:35 -05001528 @$(kecho) ' Building modules, stage 2.';
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001529 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530
Paul Smith4f193362006-03-05 17:14:10 -05001531PHONY += modules_install
Sam Ravnborga67dc212006-01-28 23:51:57 +01001532modules_install: _emodinst_ _emodinst_post
Adrian Bunke6304662006-02-14 15:58:15 +01001533
Paul Smith4f193362006-03-05 17:14:10 -05001534install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1535PHONY += _emodinst_
Sam Ravnborga67dc212006-01-28 23:51:57 +01001536_emodinst_:
Sam Ravnborga67dc212006-01-28 23:51:57 +01001537 $(Q)mkdir -p $(MODLIB)/$(install-dir)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001538 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539
Paul Smith4f193362006-03-05 17:14:10 -05001540PHONY += _emodinst_post
Sam Ravnborga67dc212006-01-28 23:51:57 +01001541_emodinst_post: _emodinst_
1542 $(call cmd,depmod)
1543
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1545
Paul Smith4f193362006-03-05 17:14:10 -05001546PHONY += $(clean-dirs) clean
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547$(clean-dirs):
1548 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1549
1550clean: rm-dirs := $(MODVERDIR)
Michal Marek88d7be02010-09-06 12:00:08 +02001551clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552
Masahiro Yamadafe69b422016-03-13 09:39:55 +09001553PHONY += help
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554help:
1555 @echo ' Building external modules.'
1556 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1557 @echo ''
1558 @echo ' modules - default target, build the module(s)'
1559 @echo ' modules_install - install the module'
1560 @echo ' clean - remove generated files in module directory only'
1561 @echo ''
Sam Ravnborg06300b22006-01-25 07:13:18 +01001562
1563# Dummies...
Paul Smith4f193362006-03-05 17:14:10 -05001564PHONY += prepare scripts
Sam Ravnborg06300b22006-01-25 07:13:18 +01001565prepare: ;
1566scripts: ;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567endif # KBUILD_EXTMOD
1568
Michal Marek88d7be02010-09-06 12:00:08 +02001569clean: $(clean-dirs)
1570 $(call cmd,rmdirs)
1571 $(call cmd,rmfiles)
Kevin Cernekee43f67c92011-05-10 15:47:16 -07001572 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
Masahiro Yamadaef46d9b2017-11-17 01:49:13 +09001573 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
Masahiro Yamada74ce1892017-11-02 11:51:25 +09001574 -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \
Masahiro Yamadaef46d9b2017-11-17 01:49:13 +09001575 -o -name '*.dwo' -o -name '*.lst' \
Rasmus Villemoesd523b252015-08-20 11:53:29 +02001576 -o -name '*.su' \
Michal Marek88d7be02010-09-06 12:00:08 +02001577 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
Masahiro Yamada9a8dfb32018-03-23 22:04:31 +09001578 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
Masahiro Yamada4fa8bc92018-03-23 22:04:37 +09001579 -o -name '*.asn1.[ch]' \
Michal Marek88d7be02010-09-06 12:00:08 +02001580 -o -name '*.symtypes' -o -name 'modules.order' \
1581 -o -name modules.builtin -o -name '.tmp_*.o.*' \
Emese Revfy6b90bd42016-05-24 00:09:38 +02001582 -o -name '*.c.[012]*.*' \
Vinícius Tinti433db3e2017-04-24 13:04:58 -07001583 -o -name '*.ll' \
Michal Marek88d7be02010-09-06 12:00:08 +02001584 -o -name '*.gcno' \) -type f -print | xargs rm -f
1585
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586# Generate tags for editors
1587# ---------------------------------------------------------------------------
Sam Ravnborga680eed2008-12-03 22:24:13 +01001588quiet_cmd_tags = GEN $@
1589 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590
Jianbin Kangf4ed1002011-01-14 20:07:05 +08001591tags TAGS cscope gtags: FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 $(call cmd,tags)
1593
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594# Scripts to check various things for consistency
1595# ---------------------------------------------------------------------------
1596
Peter Foley279f3dd2011-04-26 17:15:01 -04001597PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1598
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599includecheck:
Peter Foley436f8762011-04-26 17:18:29 -04001600 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001602 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603
1604versioncheck:
Peter Foley2ee2d292011-04-26 17:19:28 -04001605 find $(srctree)/* $(RCS_FIND_IGNORE) \
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606 -name '*.[hcS]' -type f -print | sort \
Geert Uytterhoeven80007432007-11-05 11:51:44 +01001607 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
Linus Torvalds1da177e2005-04-16 15:20:36 -07001608
Nicolas Palix74425ee2010-06-06 17:15:01 +02001609coccicheck:
1610 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1611
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612namespacecheck:
1613 $(PERL) $(srctree)/scripts/namespace.pl
1614
Adrian Bunk295ac052007-08-24 23:04:56 +02001615export_report:
1616 $(PERL) $(srctree)/scripts/export_report.pl
1617
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618endif #ifeq ($(config-targets),1)
1619endif #ifeq ($(mixed-targets),1)
1620
Mike Marciniszync398ff02013-06-24 08:48:37 -04001621PHONY += checkstack kernelrelease kernelversion image_name
Jeff Dikee3ccf6e2006-09-27 01:50:37 -07001622
Jeff Dike011e3a92006-12-13 00:34:12 -08001623# UML needs a little special treatment here. It wants to use the host
1624# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1625# else wants $(ARCH), including people doing cross-builds, which means
1626# that $(SUBARCH) doesn't work here.
1627ifeq ($(ARCH), um)
1628CHECKSTACK_ARCH := $(SUBARCH)
1629else
1630CHECKSTACK_ARCH := $(ARCH)
1631endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632checkstack:
1633 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
Jeff Dike011e3a92006-12-13 00:34:12 -08001634 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635
Amerigo Wang7b8ea532010-08-20 05:36:06 -04001636kernelrelease:
1637 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
Amerigo Wang01ab1782010-06-28 10:45:21 +08001638
Sam Ravnborgcb584552006-01-09 21:20:34 +01001639kernelversion:
Sam Ravnborg2244cbd2006-01-16 12:12:12 +01001640 @echo $(KERNELVERSION)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641
Mike Marciniszync398ff02013-06-24 08:48:37 -04001642image_name:
1643 @echo $(KBUILD_IMAGE)
1644
Borislav Petkovea01fa92012-04-11 18:36:18 +02001645# Clear a bunch of variables before executing the submake
1646tools/: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001647 $(Q)mkdir -p $(objtree)/tools
Masahiro Yamada8e9b4662017-08-20 15:04:11 +09001648 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
Borislav Petkovea01fa92012-04-11 18:36:18 +02001649
1650tools/%: FORCE
David Howellsbf351822012-11-05 21:02:08 +00001651 $(Q)mkdir -p $(objtree)/tools
Masahiro Yamada8e9b4662017-08-20 15:04:11 +09001652 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
Borislav Petkovea01fa92012-04-11 18:36:18 +02001653
Sam Ravnborg06300b22006-01-25 07:13:18 +01001654# Single targets
1655# ---------------------------------------------------------------------------
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001656# Single targets are compatible with:
Robert P. J. Daye1b85132008-02-03 15:14:02 +02001657# - build with mixed source and output
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001658# - build with separate output dir 'make O=...'
1659# - external modules
1660#
1661# target-dir => where to store outputfile
1662# build-dir => directory in kernel source tree to use
Sam Ravnborg06300b22006-01-25 07:13:18 +01001663
Sam Ravnborg06300b22006-01-25 07:13:18 +01001664ifeq ($(KBUILD_EXTMOD),)
Sam Ravnborgaa360872006-04-06 08:25:31 +02001665 build-dir = $(patsubst %/,%,$(dir $@))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001666 target-dir = $(dir $@)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001667else
1668 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001669 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1670 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
Sam Ravnborg06300b22006-01-25 07:13:18 +01001671endif
1672
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001673%.s: %.c prepare scripts FORCE
1674 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1675%.i: %.c prepare scripts FORCE
1676 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1677%.o: %.c prepare scripts FORCE
1678 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1679%.lst: %.c prepare scripts FORCE
1680 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1681%.s: %.S prepare scripts FORCE
1682 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1683%.o: %.S prepare scripts FORCE
1684 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Andreas Gruenbacher15fde672006-05-09 20:37:30 +02001685%.symtypes: %.c prepare scripts FORCE
1686 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Vinícius Tinti433db3e2017-04-24 13:04:58 -07001687%.ll: %.c prepare scripts FORCE
1688 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001689
1690# Modules
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001691/: prepare scripts FORCE
1692 $(cmd_crmodverdir)
1693 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1694 $(build)=$(build-dir)
Peter Foley8e2faea2014-09-25 11:23:58 -07001695# Make sure the latest headers are built for Documentation
Arnd Bergmannddea05f2016-07-04 16:39:35 +02001696Documentation/ samples/: headers_install
Sam Ravnborg31110eb2008-12-13 23:00:45 +01001697%/: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001698 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001699 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001700 $(build)=$(build-dir)
1701%.ko: prepare scripts FORCE
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001702 $(cmd_crmodverdir)
Sam Ravnborg06300b22006-01-25 07:13:18 +01001703 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
Sam Ravnborgbc2546a2006-04-05 12:57:21 +02001704 $(build)=$(build-dir) $(@:.ko=.o)
Sam Ravnborgb805aa02006-08-08 21:36:08 +02001705 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
Sam Ravnborg06300b22006-01-25 07:13:18 +01001706
Masahiro Yamada38385f82014-04-28 16:26:18 +09001707# FIXME Should go into a make.lib or something
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708# ===========================================================================
1709
1710quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1711 cmd_rmdirs = rm -rf $(rm-dirs)
1712
1713quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1714 cmd_rmfiles = rm -f $(rm-files)
1715
Uwe Kleine-Königbc3c26f2008-04-21 22:53:56 +00001716# Run depmod only if we have System.map and depmod is executable
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001717quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
Michal Marek569658d2011-06-15 22:15:47 +02001718 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
Masahiro Yamada5a144a12018-05-09 16:23:48 +09001719 $(KERNELRELEASE)
Sam Ravnborg50a8ec32007-10-18 21:24:21 +02001720
Sam Ravnborg7bb9d092007-10-19 22:20:02 +02001721# Create temporary dir for module support files
Sam Ravnborgab19f872007-10-22 11:23:07 +02001722# clean it up only when building all modules
1723cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1724 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726# read all saved command lines
1727
Masahiro Yamada2982c952017-11-13 19:29:35 +09001728cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729
1730ifneq ($(cmd_files),)
1731 $(cmd_files): ; # Do not try to update included dependency files
1732 include $(cmd_files)
1733endif
1734
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735endif # skip-makefile
1736
Paul Smith4f193362006-03-05 17:14:10 -05001737PHONY += FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738FORCE:
Paul Smith4f193362006-03-05 17:14:10 -05001739
Ulf Magnussonbd412d82018-07-05 12:33:07 +09001740# Declare the contents of the PHONY variable as phony. We keep that
Kirill Smelkovfe8d0a42009-04-09 15:34:34 +04001741# information in a variable so we can use it in if_changed and friends.
Paul Smith4f193362006-03-05 17:14:10 -05001742.PHONY: $(PHONY)