xref: /openbmc/linux/Makefile (revision cfe17c9b)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2c517d838SLinus TorvaldsVERSION = 4
34fbd8d19SLinus TorvaldsPATCHLEVEL = 15
455922c9dSLinus TorvaldsSUBLEVEL = 0
5ae64f9bdSLinus TorvaldsEXTRAVERSION = -rc2
6566cf877SLinus TorvaldsNAME = Fearless Coyote
71da177e4SLinus Torvalds
81da177e4SLinus Torvalds# *DOCUMENTATION*
91da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
101da177e4SLinus Torvalds# More info can be located in ./README
111da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
121da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
131da177e4SLinus Torvalds
14ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
15ba634eceSMasahiro YamadaPHONY := _all
16ba634eceSMasahiro Yamada_all:
17ba634eceSMasahiro Yamada
18a436bb7bSMasahiro Yamada# o Do not use make's built-in rules and variables
19d384e35aSLinus Nilsson#   (this increases performance and avoids hard-to-debug behaviour);
20a436bb7bSMasahiro Yamada# o Look for make include files relative to root of kernel src
21a436bb7bSMasahiro YamadaMAKEFLAGS += -rR --include-dir=$(CURDIR)
221da177e4SLinus Torvalds
23c051346bSH. Peter Anvin# Avoid funny character set dependencies
2406b5dc64SH. Peter Anvinunexport LC_ALL
25c051346bSH. Peter AnvinLC_COLLATE=C
26c051346bSH. Peter AnvinLC_NUMERIC=C
2707105202SMichal Marekexport LC_COLLATE LC_NUMERIC
28c051346bSH. Peter Anvin
29ab7474eaSBorislav Petkov# Avoid interference with shell env settings
30ab7474eaSBorislav Petkovunexport GREP_OPTIONS
31ab7474eaSBorislav Petkov
321da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
331da177e4SLinus Torvalds# to get the ordering right.
341da177e4SLinus Torvalds#
351da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
361da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
371da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
381da177e4SLinus Torvalds# unavoidable when linking the built-in.o targets which finally
391da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
401da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
411da177e4SLinus Torvalds# is now up to date.
421da177e4SLinus Torvalds#
431da177e4SLinus Torvalds# The only cases where we need to modify files which have global
441da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
451da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
461da177e4SLinus Torvalds# prepare rule.
471da177e4SLinus Torvalds
48066b7ed9SMichal Marek# Beautify output
49066b7ed9SMichal Marek# ---------------------------------------------------------------------------
50066b7ed9SMichal Marek#
51066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
52066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
53066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
54066b7ed9SMichal Marek#
55066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
56066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
57066b7ed9SMichal Marek#
58066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
59066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
60066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
61066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
62066b7ed9SMichal Marek#
63066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
64066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
65066b7ed9SMichal Marek#
66066b7ed9SMichal Marek#	$(Q)ln $@ :<
67066b7ed9SMichal Marek#
68066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
69066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
70066b7ed9SMichal Marek#
711da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
721da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
731da177e4SLinus Torvalds
741da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
751da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
761da177e4SLinus Torvaldsendif
771da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
781da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
791da177e4SLinus Torvaldsendif
801da177e4SLinus Torvalds
81066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
82066b7ed9SMichal Marek  quiet =
83066b7ed9SMichal Marek  Q =
84066b7ed9SMichal Marekelse
85066b7ed9SMichal Marek  quiet=quiet_
86066b7ed9SMichal Marek  Q = @
87066b7ed9SMichal Marekendif
88066b7ed9SMichal Marek
89066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
90066b7ed9SMichal Marek# commands
91066b7ed9SMichal Marek
926f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
93066b7ed9SMichal Marek  quiet=silent_
94e572d088SJosh Poimboeuf  tools_silent=s
95066b7ed9SMichal Marekendif
96066b7ed9SMichal Marek
97066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
98066b7ed9SMichal Marek
991da177e4SLinus Torvalds# kbuild supports saving output files in a separate directory.
1001da177e4SLinus Torvalds# To locate output files in a separate directory two syntaxes are supported.
1011da177e4SLinus Torvalds# In both cases the working directory must be the root of the kernel src.
1021da177e4SLinus Torvalds# 1) O=
1031da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1041da177e4SLinus Torvalds#
1051da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
1061da177e4SLinus Torvalds# Set the environment variable KBUILD_OUTPUT to point to the directory
1071da177e4SLinus Torvalds# where the output files shall be placed.
1081da177e4SLinus Torvalds# export KBUILD_OUTPUT=dir/to/store/output/files/
1091da177e4SLinus Torvalds# make
1101da177e4SLinus Torvalds#
1111da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1121da177e4SLinus Torvalds# variable.
1131da177e4SLinus Torvalds
114c4e6fff1SCao jin# KBUILD_SRC is not intended to be used by the regular user (for now),
115c4e6fff1SCao jin# it is set on invocation of make with KBUILD_OUTPUT or O= specified.
1161da177e4SLinus Torvaldsifeq ($(KBUILD_SRC),)
1171da177e4SLinus Torvalds
1181da177e4SLinus Torvalds# OK, Make called in directory where kernel src resides
1191da177e4SLinus Torvalds# Do we want to locate output files in a separate directory?
1201da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1211da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1221da177e4SLinus Torvaldsendif
1231da177e4SLinus Torvalds
1241cacc9abSSam Ravnborg# Cancel implicit rules on top Makefile
1251cacc9abSSam Ravnborg$(CURDIR)/Makefile Makefile: ;
1261cacc9abSSam Ravnborg
12751193b76SRobert Jarzmikifneq ($(words $(subst :, ,$(CURDIR))), 1)
12851193b76SRobert Jarzmik  $(error main directory cannot contain spaces nor colons)
12951193b76SRobert Jarzmikendif
13051193b76SRobert Jarzmik
1311da177e4SLinus Torvaldsifneq ($(KBUILD_OUTPUT),)
1321da177e4SLinus Torvalds# check that the output directory actually exists
1331da177e4SLinus Torvaldssaved-output := $(KBUILD_OUTPUT)
134028568d8SMasahiro YamadaKBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
13516f8259cSBjørn Forsman								&& pwd)
1361da177e4SLinus Torvalds$(if $(KBUILD_OUTPUT),, \
1371c9e70a5SMasahiro Yamada     $(error failed to create output directory "$(saved-output)"))
1381da177e4SLinus Torvalds
1390b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
1400b35786dSMilton Miller
1411cacc9abSSam Ravnborg$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
14216f89098SCharles Keepax	@:
1430b35786dSMilton Miller
144c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
1452e8d696bSMasahiro Yamadasub-make:
146745a2543SMasahiro Yamada	$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
147aa55c8e2SMasahiro Yamada	-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
1481da177e4SLinus Torvalds
1491da177e4SLinus Torvalds# Leave processing to above invocation of make
1501da177e4SLinus Torvaldsskip-makefile := 1
1511da177e4SLinus Torvaldsendif # ifneq ($(KBUILD_OUTPUT),)
1521da177e4SLinus Torvaldsendif # ifeq ($(KBUILD_SRC),)
1531da177e4SLinus Torvalds
1541da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
1551da177e4SLinus Torvaldsifeq ($(skip-makefile),)
1561da177e4SLinus Torvalds
1577ff52571SMasahiro Yamada# Do not print "Entering directory ...",
1587ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
1597ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
1607ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
1617ff52571SMasahiro Yamada
162aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
163aa55c8e2SMasahiro Yamada# C compilation.
164aa55c8e2SMasahiro Yamada#
165aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
166aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
167aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
168aa55c8e2SMasahiro Yamada#
169036db11cSCao jin# See the file "Documentation/dev-tools/sparse.rst" for more details,
170036db11cSCao jin# including where to get the "sparse" utility.
171aa55c8e2SMasahiro Yamada
172aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
173aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
174aa55c8e2SMasahiro Yamadaendif
175aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
176aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
177aa55c8e2SMasahiro Yamadaendif
178aa55c8e2SMasahiro Yamada
179aa55c8e2SMasahiro Yamada# Use make M=dir to specify directory of external module to build
180aa55c8e2SMasahiro Yamada# Old syntax make ... SUBDIRS=$PWD is still supported
181aa55c8e2SMasahiro Yamada# Setting the environment variable KBUILD_EXTMOD take precedence
182aa55c8e2SMasahiro Yamadaifdef SUBDIRS
183aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD ?= $(SUBDIRS)
184aa55c8e2SMasahiro Yamadaendif
185aa55c8e2SMasahiro Yamada
186aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
187aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
188aa55c8e2SMasahiro Yamadaendif
189aa55c8e2SMasahiro Yamada
1909da0763bSMichal Marekifeq ($(KBUILD_SRC),)
1919da0763bSMichal Marek        # building in the source tree
1929da0763bSMichal Marek        srctree := .
1939da0763bSMichal Marekelse
1949da0763bSMichal Marek        ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
1959da0763bSMichal Marek                # building in a subdirectory of the source tree
1969da0763bSMichal Marek                srctree := ..
1979da0763bSMichal Marek        else
1989da0763bSMichal Marek                srctree := $(KBUILD_SRC)
1999da0763bSMichal Marek        endif
2009da0763bSMichal Marekendif
2012c1f4f12SMasahiro Yamada
2022c1f4f12SMasahiro Yamadaexport KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
2032c1f4f12SMasahiro Yamada
2047e1c0477SMichal Marekobjtree		:= .
2051da177e4SLinus Torvaldssrc		:= $(srctree)
2061da177e4SLinus Torvaldsobj		:= $(objtree)
2071da177e4SLinus Torvalds
2080f558c33SMattia DongiliVPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
2091da177e4SLinus Torvalds
21011294235SAmerigo Wangexport srctree objtree VPATH
2111da177e4SLinus Torvalds
2122c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
2132c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
2142c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
2152c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
2162c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
2172c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
2182c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
2192c1f4f12SMasahiro Yamada
2202c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
2212c1f4f12SMasahiro Yamadaold_version_h := include/linux/version.h
2222c1f4f12SMasahiro Yamada
2232c1f4f12SMasahiro Yamadano-dot-config-targets := clean mrproper distclean \
2242c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
2252c1f4f12SMasahiro Yamada			 $(version_h) headers_% archheaders archscripts \
2262c1f4f12SMasahiro Yamada			 kernelversion %src-pkg
2272c1f4f12SMasahiro Yamada
2282c1f4f12SMasahiro Yamadaconfig-targets := 0
2292c1f4f12SMasahiro Yamadamixed-targets  := 0
2302c1f4f12SMasahiro Yamadadot-config     := 1
2312c1f4f12SMasahiro Yamada
2322c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2332c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
2342c1f4f12SMasahiro Yamada		dot-config := 0
2352c1f4f12SMasahiro Yamada	endif
2362c1f4f12SMasahiro Yamadaendif
2372c1f4f12SMasahiro Yamada
2382c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
2392c1f4f12SMasahiro Yamada        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
2402c1f4f12SMasahiro Yamada                config-targets := 1
2412c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
2422c1f4f12SMasahiro Yamada                        mixed-targets := 1
2432c1f4f12SMasahiro Yamada                endif
2442c1f4f12SMasahiro Yamada        endif
2452c1f4f12SMasahiro Yamadaendif
2462c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
2472c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
2482c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
2492c1f4f12SMasahiro Yamada	        mixed-targets := 1
2502c1f4f12SMasahiro Yamada        endif
2512c1f4f12SMasahiro Yamadaendif
2522c1f4f12SMasahiro Yamada
2532c1f4f12SMasahiro Yamadaifeq ($(mixed-targets),1)
2542c1f4f12SMasahiro Yamada# ===========================================================================
2552c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
2562c1f4f12SMasahiro Yamada# Handle them one by one.
2572c1f4f12SMasahiro Yamada
2582c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
2592c1f4f12SMasahiro Yamada
2602c1f4f12SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
2612c1f4f12SMasahiro Yamada	@:
2622c1f4f12SMasahiro Yamada
2632c1f4f12SMasahiro Yamada__build_one_by_one:
2642c1f4f12SMasahiro Yamada	$(Q)set -e; \
2652c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
2662c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
2672c1f4f12SMasahiro Yamada	done
2682c1f4f12SMasahiro Yamada
2692c1f4f12SMasahiro Yamadaelse
2702c1f4f12SMasahiro Yamada
2712c1f4f12SMasahiro Yamada# We need some generic definitions (do not try to remake the file).
2722c1f4f12SMasahiro Yamadascripts/Kbuild.include: ;
2732c1f4f12SMasahiro Yamadainclude scripts/Kbuild.include
2742c1f4f12SMasahiro Yamada
2752c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
2762c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
2772c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
2782c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
2792c1f4f12SMasahiro Yamada
2801da177e4SLinus Torvalds# SUBARCH tells the usermode build what the underlying arch is.  That is set
2811da177e4SLinus Torvalds# first, and if a usermode build is happening, the "ARCH=um" on the command
2821da177e4SLinus Torvalds# line overrides the setting of ARCH below.  If a native build is happening,
2831da177e4SLinus Torvalds# then ARCH is assigned, getting whatever value it gets normally, and
2841da177e4SLinus Torvalds# SUBARCH is subsequently ignored.
2851da177e4SLinus Torvalds
286ffee0de4SDavid WoodhouseSUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
287ffee0de4SDavid Woodhouse				  -e s/sun4u/sparc64/ \
2881da177e4SLinus Torvalds				  -e s/arm.*/arm/ -e s/sa110/arm/ \
28939990b5eSLinus Torvalds				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
290236b1957SPaul Mundt				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
291fbe934d6SPalmer Dabbelt				  -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
292fbe934d6SPalmer Dabbelt				  -e s/riscv.*/riscv/)
2931da177e4SLinus Torvalds
2941da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
2951da177e4SLinus Torvalds# ---------------------------------------------------------------------------
2961da177e4SLinus Torvalds#
2971da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
2981da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
2991da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3001da177e4SLinus Torvalds# make ARCH=ia64
3011da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3021da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3031da177e4SLinus Torvalds
3041da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3051da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3061da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3071da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3081da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3091da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
31084336466SRoland McGrath# A third alternative is to store a setting in .config so that plain
31184336466SRoland McGrath# "make" in the configured kernel build directory always uses that.
3121da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3131da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3142331d1a6SSam RavnborgARCH		?= $(SUBARCH)
31584336466SRoland McGrathCROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
3161da177e4SLinus Torvalds
3171da177e4SLinus Torvalds# Architecture as present in compile.h
3181da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
3196752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
3201da177e4SLinus Torvalds
321d746d647SSam Ravnborg# Additional ARCH settings for x86
322d746d647SSam Ravnborgifeq ($(ARCH),i386)
323d746d647SSam Ravnborg        SRCARCH := x86
324d746d647SSam Ravnborgendif
325d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
326d746d647SSam Ravnborg        SRCARCH := x86
327d746d647SSam Ravnborgendif
32874b469f2SSam Ravnborg
3295e538790SSam Ravnborg# Additional ARCH settings for sparc
330e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
331e69f58c0SNamhyung Kim       SRCARCH := sparc
332e69f58c0SNamhyung Kimendif
333a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
3345e538790SSam Ravnborg       SRCARCH := sparc
335a439fe51SSam Ravnborgendif
3362fb9b1bdSSam Ravnborg
3373cc000b5SPaul Mundt# Additional ARCH settings for sh
3383cc000b5SPaul Mundtifeq ($(ARCH),sh64)
3393cc000b5SPaul Mundt       SRCARCH := sh
3403cc000b5SPaul Mundtendif
3413cc000b5SPaul Mundt
34218aecc2bSChris Metcalf# Additional ARCH settings for tile
3436738d321SChris Metcalfifeq ($(ARCH),tilepro)
3446738d321SChris Metcalf       SRCARCH := tile
3456738d321SChris Metcalfendif
34618aecc2bSChris Metcalfifeq ($(ARCH),tilegx)
34718aecc2bSChris Metcalf       SRCARCH := tile
34818aecc2bSChris Metcalfendif
34918aecc2bSChris Metcalf
35014cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
35141263fc6SBen Gardinerexport KCONFIG_CONFIG
35214cdd3c4SRoman Zippel
3531da177e4SLinus Torvalds# SHELL used by kbuild
3541da177e4SLinus TorvaldsCONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
3551da177e4SLinus Torvalds	  else if [ -x /bin/bash ]; then echo /bin/bash; \
3561da177e4SLinus Torvalds	  else echo sh; fi ; fi)
3571da177e4SLinus Torvalds
358d7f14c66SUwe Kleine-KönigHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS)
359d7f14c66SUwe Kleine-KönigHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS)
360d7f14c66SUwe Kleine-KönigHOST_LFS_LIBS := $(shell getconf LFS_LIBS)
361d7f14c66SUwe Kleine-König
3621da177e4SLinus TorvaldsHOSTCC       = gcc
3631da177e4SLinus TorvaldsHOSTCXX      = g++
364d7f14c66SUwe Kleine-KönigHOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
365d7f14c66SUwe Kleine-König		-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
366d7f14c66SUwe Kleine-KönigHOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
367d7f14c66SUwe Kleine-KönigHOSTLDFLAGS  := $(HOST_LFS_LDFLAGS)
368d7f14c66SUwe Kleine-KönigHOST_LOADLIBES := $(HOST_LFS_LIBS)
3691da177e4SLinus Torvalds
3701da177e4SLinus Torvalds# Make variables (CC, etc...)
3711da177e4SLinus TorvaldsAS		= $(CROSS_COMPILE)as
3721da177e4SLinus TorvaldsLD		= $(CROSS_COMPILE)ld
3731da177e4SLinus TorvaldsCC		= $(CROSS_COMPILE)gcc
3741da177e4SLinus TorvaldsCPP		= $(CC) -E
3751da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
3761da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
3771da177e4SLinus TorvaldsSTRIP		= $(CROSS_COMPILE)strip
3781da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
3791da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
3801da177e4SLinus TorvaldsAWK		= awk
3811da177e4SLinus TorvaldsGENKSYMS	= scripts/genksyms/genksyms
382caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
3831da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
3841da177e4SLinus TorvaldsPERL		= perl
385011bf125SMasahiro YamadaPYTHON		= python
3861da177e4SLinus TorvaldsCHECK		= sparse
3871da177e4SLinus Torvalds
38880a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
38980a7d1d9SHannes Eder		  -Wbitwise -Wno-return-void $(CF)
390b36fad65SMichal MarekNOSTDINC_FLAGS  =
3916588169dSSam RavnborgCFLAGS_MODULE   =
3926588169dSSam RavnborgAFLAGS_MODULE   =
3936588169dSSam RavnborgLDFLAGS_MODULE  =
3941da177e4SLinus TorvaldsCFLAGS_KERNEL	=
3951da177e4SLinus TorvaldsAFLAGS_KERNEL	=
396b36fad65SMichal MarekLDFLAGS_vmlinux =
3971da177e4SLinus Torvalds
398abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
399abbf1590SDavid HowellsUSERINCLUDE    := \
4009d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
4019d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
402abbf1590SDavid Howells		-I$(srctree)/include/uapi \
4033308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
404abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
405abbf1590SDavid Howells
4061da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
4071da177e4SLinus Torvalds# Needed to be compatible with the O= option
408abbf1590SDavid HowellsLINUXINCLUDE    := \
4099d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
4109d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
41196f13045SSam Ravnborg		$(if $(KBUILD_SRC), -I$(srctree)/include) \
412f8224f7fSMasahiro Yamada		-I$(objtree)/include \
413f8224f7fSMasahiro Yamada		$(USERINCLUDE)
4141da177e4SLinus Torvalds
415433dc2ebSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__
416a0f97e06SSam RavnborgKBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
4178c97023cSArnd Bergmann		   -fno-strict-aliasing -fno-common -fshort-wchar \
418a8735821SFloris Kraak		   -Werror-implicit-function-declaration \
41951b97e35SKirill A. Shutemov		   -Wno-format-security \
420433dc2ebSMasahiro Yamada		   -std=gnu89
421433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
42280c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
42380c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
4246588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
4256588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
4266588169dSSam RavnborgKBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
427433dc2ebSMasahiro YamadaGCC_PLUGINS_CFLAGS :=
4281da177e4SLinus Torvalds
42980ef88d6SSam Ravnborgexport ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
430d7f14c66SUwe Kleine-Königexport CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
431011bf125SMasahiro Yamadaexport MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
432070b98bfSSam Ravnborgexport HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
4331da177e4SLinus Torvalds
43406c5040cSSam Ravnborgexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
435433dc2ebSMasahiro Yamadaexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_KASAN CFLAGS_UBSAN
436222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
4376588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
43880c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
43940df759eSMichal Marekexport KBUILD_ARFLAGS
4401da177e4SLinus Torvalds
4411da177e4SLinus Torvalds# When compiling out-of-tree modules, put MODVERDIR in the module
4421da177e4SLinus Torvalds# tree rather than in the kernel tree. The kernel tree might
4431da177e4SLinus Torvalds# even be read-only.
4441da177e4SLinus Torvaldsexport MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
4451da177e4SLinus Torvalds
4461da177e4SLinus Torvalds# Files to ignore in find ... statements
4471da177e4SLinus Torvalds
448ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
449ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
450ae63b2d7SPrarit Bhargava			  -prune -o
451450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
452450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
4531da177e4SLinus Torvalds
4541da177e4SLinus Torvalds# ===========================================================================
4551da177e4SLinus Torvalds# Rules shared between *config targets and build targets
4561da177e4SLinus Torvalds
457312a3d09SCao jin# Basic helpers built in scripts/basic/
4584f193362SPaul SmithPHONY += scripts_basic
4591da177e4SLinus Torvaldsscripts_basic:
4601da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
461638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
4621da177e4SLinus Torvalds
463cd05e6bdSJan Beulich# To avoid any implicit rule to kick in, define an empty command.
464cd05e6bdSJan Beulichscripts/basic/%: scripts_basic ;
465cd05e6bdSJan Beulich
4664f193362SPaul SmithPHONY += outputmakefile
467fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
468fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
469fd5f0cd6SJan Beulich# output directory.
4701da177e4SLinus Torvaldsoutputmakefile:
471fd5f0cd6SJan Beulichifneq ($(KBUILD_SRC),)
47292979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
473fd5f0cd6SJan Beulich	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
474fd5f0cd6SJan Beulich	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
475fd5f0cd6SJan Beulichendif
4761da177e4SLinus Torvalds
477ae6b289aSChris Friesifeq ($(cc-name),clang)
478ae6b289aSChris Friesifneq ($(CROSS_COMPILE),)
479ae6b289aSChris FriesCLANG_TARGET	:= --target=$(notdir $(CROSS_COMPILE:%-=%))
480ae6b289aSChris FriesGCC_TOOLCHAIN	:= $(realpath $(dir $(shell which $(LD)))/..)
481ae6b289aSChris Friesendif
482ae6b289aSChris Friesifneq ($(GCC_TOOLCHAIN),)
483ae6b289aSChris FriesCLANG_GCC_TC	:= --gcc-toolchain=$(GCC_TOOLCHAIN)
484ae6b289aSChris Friesendif
485ae6b289aSChris FriesKBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
486ae6b289aSChris FriesKBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
487ae6b289aSChris Friesendif
488ae6b289aSChris Fries
4891da177e4SLinus Torvaldsifeq ($(config-targets),1)
4901da177e4SLinus Torvalds# ===========================================================================
4911da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
4921da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
4931da177e4SLinus Torvalds
4941da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
4951da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
4961da177e4SLinus Torvalds# used for 'make defconfig'
497a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
49861bee204SAl Viroexport KBUILD_DEFCONFIG KBUILD_KCONFIG
4991da177e4SLinus Torvalds
50031110ebbSSam Ravnborgconfig: scripts_basic outputmakefile FORCE
50131110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
50231110ebbSSam Ravnborg
50331110ebbSSam Ravnborg%config: scripts_basic outputmakefile FORCE
5041da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
5051da177e4SLinus Torvalds
5061da177e4SLinus Torvaldselse
5071da177e4SLinus Torvalds# ===========================================================================
5081da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
5091da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
5101da177e4SLinus Torvalds
5112c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
5122c1f4f12SMasahiro Yamada# but instead _all depend on modules
5132c1f4f12SMasahiro YamadaPHONY += all
5142c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
5152c1f4f12SMasahiro Yamada_all: all
5162c1f4f12SMasahiro Yamadaelse
5172c1f4f12SMasahiro Yamada_all: modules
5182c1f4f12SMasahiro Yamadaendif
5192c1f4f12SMasahiro Yamada
5202c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
5212c1f4f12SMasahiro Yamada# Normally, just do built-in.
5222c1f4f12SMasahiro Yamada
5232c1f4f12SMasahiro YamadaKBUILD_MODULES :=
5242c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
5252c1f4f12SMasahiro Yamada
5262c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
5272c1f4f12SMasahiro Yamada# When we're building modules with modversions, we need to consider
5282c1f4f12SMasahiro Yamada# the built-in objects during the descend as well, in order to
5292c1f4f12SMasahiro Yamada# make sure the checksums are up to date before we record them.
5302c1f4f12SMasahiro Yamada
5312c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
5322c1f4f12SMasahiro Yamada  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
5332c1f4f12SMasahiro Yamadaendif
5342c1f4f12SMasahiro Yamada
5352c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
5362c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
5372c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
5382c1f4f12SMasahiro Yamada
5392c1f4f12SMasahiro Yamadaifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
5402c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
5412c1f4f12SMasahiro Yamadaendif
5422c1f4f12SMasahiro Yamada
5432c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
5442c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
5452c1f4f12SMasahiro Yamadaendif
5462c1f4f12SMasahiro Yamada
5472c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
5482c1f4f12SMasahiro Yamada
5491da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
5501da177e4SLinus Torvalds# Additional helpers built in scripts/
5511da177e4SLinus Torvalds# Carefully list dependencies so we do not try to build scripts twice
552070b98bfSSam Ravnborg# in parallel
5534f193362SPaul SmithPHONY += scripts
554a54292f5SAndreas Schwabscripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
5556b90bd4bSEmese Revfy	 asm-generic gcc-plugins
5561da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(@)
5571da177e4SLinus Torvalds
5581da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
5591da177e4SLinus Torvaldsinit-y		:= init/
560df85b2d7SMarkus Trippelsdorfdrivers-y	:= drivers/ sound/ firmware/
5611da177e4SLinus Torvaldsnet-y		:= net/
5621da177e4SLinus Torvaldslibs-y		:= lib/
5631da177e4SLinus Torvaldscore-y		:= usr/
56437d9fe47SFeng Wuvirt-y		:= virt/
5651da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
5661da177e4SLinus Torvalds
5671da177e4SLinus Torvaldsifeq ($(dot-config),1)
5689ee4e336SSam Ravnborg# Read in config
5699ee4e336SSam Ravnborg-include include/config/auto.conf
5701da177e4SLinus Torvalds
5719ee4e336SSam Ravnborgifeq ($(KBUILD_EXTMOD),)
5721da177e4SLinus Torvalds# Read in dependencies to all Kconfig* files, make sure to run
5731da177e4SLinus Torvalds# oldconfig if changes are detected.
574c955ccafSRoman Zippel-include include/config/auto.conf.cmd
5751da177e4SLinus Torvalds
5761da177e4SLinus Torvalds# To avoid any implicit rule to kick in, define an empty command
57714cdd3c4SRoman Zippel$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
5781da177e4SLinus Torvalds
579c955ccafSRoman Zippel# If .config is newer than include/config/auto.conf, someone tinkered
580752625cfSSam Ravnborg# with it and forgot to run make oldconfig.
581070b98bfSSam Ravnborg# if auto.conf.cmd is missing then we are probably in a cleaned tree so
582752625cfSSam Ravnborg# we execute the config step to be sure to catch updated Kconfig files
583bc081dd6SMichal Marekinclude/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
5841da177e4SLinus Torvalds	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
5851da177e4SLinus Torvaldselse
586264a2683SSam Ravnborg# external modules needs include/generated/autoconf.h and include/config/auto.conf
5879ee4e336SSam Ravnborg# but do not care if they are up-to-date. Use auto.conf to trigger the test
5889ee4e336SSam RavnborgPHONY += include/config/auto.conf
5899ee4e336SSam Ravnborg
5909ee4e336SSam Ravnborginclude/config/auto.conf:
591264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
5925369f550SMichal Marek	echo >&2;							\
5935369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
5945369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
5955369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
5965369f550SMichal Marek	echo >&2 ;							\
5979ee4e336SSam Ravnborg	/bin/false)
5989ee4e336SSam Ravnborg
5999ee4e336SSam Ravnborgendif # KBUILD_EXTMOD
600c955ccafSRoman Zippel
6011da177e4SLinus Torvaldselse
6021da177e4SLinus Torvalds# Dummy target needed, because used as prerequisite
603c955ccafSRoman Zippelinclude/config/auto.conf: ;
6049ee4e336SSam Ravnborgendif # $(dot-config)
6051da177e4SLinus Torvalds
60686556392SNicolas Pitre# For the kernel to actually contain only the needed exported symbols,
60786556392SNicolas Pitre# we have to build modules as well to determine what those symbols are.
60886556392SNicolas Pitre# (this can be evaluated only once include/config/auto.conf has been included)
60986556392SNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
61086556392SNicolas Pitre  KBUILD_MODULES := 1
61186556392SNicolas Pitreendif
61286556392SNicolas Pitre
6131da177e4SLinus Torvalds# The all: target is the default when no target is given on the
6141da177e4SLinus Torvalds# command line.
6151da177e4SLinus Torvalds# This allow a user to issue only 'make' to build a kernel including modules
616c8447161SMichal Marek# Defaults to vmlinux, but the arch makefile usually adds further targets
6171da177e4SLinus Torvaldsall: vmlinux
6181da177e4SLinus Torvalds
619433dc2ebSMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fno-PIE)
620433dc2ebSMasahiro YamadaKBUILD_AFLAGS	+= $(call cc-option,-fno-PIE)
621433dc2ebSMasahiro YamadaCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
622433dc2ebSMasahiro Yamadaexport CFLAGS_GCOV CFLAGS_KCOV
623433dc2ebSMasahiro Yamada
6246dd3f13eSMichal Marek# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
6256dd3f13eSMichal Marek# values of the respective KBUILD_* variables
6266dd3f13eSMichal MarekARCH_CPPFLAGS :=
6276dd3f13eSMichal MarekARCH_AFLAGS :=
6286dd3f13eSMichal MarekARCH_CFLAGS :=
629a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
630a1c48bb1SGeert Uytterhoeven
631a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
632ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
633bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
634bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
635bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, int-in-bool-context)
636a1c48bb1SGeert Uytterhoeven
6371da177e4SLinus Torvaldsifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
6386748cb3cSBehan WebsterKBUILD_CFLAGS	+= $(call cc-option,-Oz,-Os)
6396748cb3cSBehan WebsterKBUILD_CFLAGS	+= $(call cc-disable-warning,maybe-uninitialized,)
6401da177e4SLinus Torvaldselse
641815eb71eSArnd Bergmannifdef CONFIG_PROFILE_ALL_BRANCHES
642a76bcf55SArnd BergmannKBUILD_CFLAGS	+= -O2 $(call cc-disable-warning,maybe-uninitialized,)
643815eb71eSArnd Bergmannelse
644a0f97e06SSam RavnborgKBUILD_CFLAGS   += -O2
6451da177e4SLinus Torvaldsendif
646815eb71eSArnd Bergmannendif
6471da177e4SLinus Torvalds
648a76bcf55SArnd BergmannKBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
649a76bcf55SArnd Bergmann			$(call cc-disable-warning,maybe-uninitialized,))
650a76bcf55SArnd Bergmann
65169102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
65269102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
65369102311SJiri Kosina
6547292ae3dSGleb Fotengauer-Malinovskiy# check for 'asm goto'
6554e562071SDouglas Andersonifeq ($(call shell-cached,$(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
6567292ae3dSGleb Fotengauer-Malinovskiy	KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
6577292ae3dSGleb Fotengauer-Malinovskiy	KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
6587292ae3dSGleb Fotengauer-Malinovskiyendif
6597292ae3dSGleb Fotengauer-Malinovskiy
660d677a4d6SVictor Chibotaruinclude scripts/Makefile.kcov
6616b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins
6626b90bd4bSEmese Revfy
6631873e870SAndi Kleenifdef CONFIG_READABLE_ASM
6641873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
6651873e870SAndi Kleen# reorder blocks reorders the control in the function
6661873e870SAndi Kleen# ipa clone creates specialized cloned functions
6671873e870SAndi Kleen# partial inlining inlines only parts of functions
6681873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
6691873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
6701873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
6711873e870SAndi Kleenendif
6721873e870SAndi Kleen
67308f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
67435bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
67535bb5b1eSAndi Kleenendif
67635bb5b1eSAndi Kleen
677c965b105SKees Cook# This selects the stack protector compiler flag. Testing it is delayed
678c965b105SKees Cook# until after .config has been reprocessed, in the prepare-compiler-check
679c965b105SKees Cook# target.
6808779657dSKees Cookifdef CONFIG_CC_STACKPROTECTOR_REGULAR
68119952a92SKees Cook  stackp-flag := -fstack-protector
682c965b105SKees Cook  stackp-name := REGULAR
6836c15b327SJan Beulichelse
6846c15b327SJan Beulichifdef CONFIG_CC_STACKPROTECTOR_STRONG
6858779657dSKees Cook  stackp-flag := -fstack-protector-strong
686c965b105SKees Cook  stackp-name := STRONG
68719952a92SKees Cookelse
68819952a92SKees Cook  # Force off for distro compilers that enable stack protector by default.
68919952a92SKees Cook  stackp-flag := $(call cc-option, -fno-stack-protector)
69019952a92SKees Cookendif
6916c15b327SJan Beulichendif
692c965b105SKees Cook# Find arch-specific stack protector compiler sanity-checking script.
693c965b105SKees Cookifdef CONFIG_CC_STACKPROTECTOR
694228d96c6SKees Cook  stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
695228d96c6SKees Cook  stackp-check := $(wildcard $(stackp-path))
696c965b105SKees Cookendif
69719952a92SKees CookKBUILD_CFLAGS += $(stackp-flag)
698e06b8b98SSam Ravnborg
699*cfe17c9bSMasahiro Yamadaifeq ($(cc-name),clang)
700*cfe17c9bSMasahiro YamadaKBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
701*cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
702*cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
703*cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, gnu)
704*cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
705*cfe17c9bSMasahiro Yamada# Quiet clang warning: comparison of unsigned expression < 0 is always false
706*cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
707*cfe17c9bSMasahiro Yamada# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
708*cfe17c9bSMasahiro Yamada# source of a reference will be _MergedGlobals and not on of the whitelisted names.
709*cfe17c9bSMasahiro Yamada# See modpost pattern 2
710*cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
711*cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
712*cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
713*cfe17c9bSMasahiro YamadaKBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
714*cfe17c9bSMasahiro Yamadaelse
715*cfe17c9bSMasahiro Yamada
716*cfe17c9bSMasahiro Yamada# These warnings generated too much noise in a regular build.
717*cfe17c9bSMasahiro Yamada# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
718*cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
719*cfe17c9bSMasahiro YamadaKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
720*cfe17c9bSMasahiro Yamadaendif
721*cfe17c9bSMasahiro Yamada
7221da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
723a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
7241da177e4SLinus Torvaldselse
7257e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
7267e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
7277e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
7287e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
7297e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
7307e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
731a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
7321da177e4SLinus Torvaldsendif
7337e9501fdSRabin Vincentendif
7341da177e4SLinus Torvalds
7352062afb4SLinus TorvaldsKBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
7362062afb4SLinus Torvalds
7371da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
738866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
739866ced95SAndi KleenKBUILD_CFLAGS   += $(call cc-option, -gsplit-dwarf, -g)
740866ced95SAndi Kleenelse
741a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -g
742866ced95SAndi Kleenendif
7432288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
7441da177e4SLinus Torvaldsendif
745bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
746bfaf2dd3SAndi KleenKBUILD_CFLAGS	+= $(call cc-option, -gdwarf-4,)
747bfaf2dd3SAndi Kleenendif
7481da177e4SLinus Torvalds
749d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
750e82c4bb8SAndi KleenKBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly) \
751e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
752d6f4ceb7SAndi Kleenendif
753d6f4ceb7SAndi Kleen
754606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
755c0a80c0cSHeiko Carstensifndef CC_FLAGS_FTRACE
756c0a80c0cSHeiko CarstensCC_FLAGS_FTRACE := -pg
757c0a80c0cSHeiko Carstensendif
758c0a80c0cSHeiko Carstensexport CC_FLAGS_FTRACE
759a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
760a2546faeSSteven RostedtCC_USING_FENTRY	:= $(call cc-option, -mfentry -DCC_USING_FENTRY)
761a2546faeSSteven Rostedtendif
762c0a80c0cSHeiko CarstensKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
763a2546faeSSteven RostedtKBUILD_AFLAGS	+= $(CC_USING_FENTRY)
76472441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
765cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
76672441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
76772441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
76872441cb1SSteven Rostedt	endif
76972441cb1SSteven Rostedtendif
77016444a8aSArnaldo Carvalho de Meloendif
77116444a8aSArnaldo Carvalho de Melo
77291341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
77391341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
77491341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
77591341d4bSSam Ravnborgendif
77691341d4bSSam Ravnborg
77790ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
77890ad4052SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-ffunction-sections,)
77990ad4052SMasahiro YamadaKBUILD_CFLAGS	+= $(call cc-option,-fdata-sections,)
78090ad4052SMasahiro Yamadaendif
78190ad4052SMasahiro Yamada
782e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
7834e562071SDouglas AndersonNOSTDINC_FLAGS += -nostdinc -isystem $(call shell-cached,$(CC) -print-file-name=include)
784e8e69931SSam RavnborgCHECKFLAGS     += $(NOSTDINC_FLAGS)
785e8e69931SSam Ravnborg
7861da177e4SLinus Torvalds# warn about C99 declaration after statement
787a0f97e06SSam RavnborgKBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
7881da177e4SLinus Torvalds
789070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
7908417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
7911da177e4SLinus Torvalds
792fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
793a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
794d0115552SLinus Torvalds
7958f7f5c9fSAndi Kleen# conserve stack if available
7968f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
7978f7f5c9fSAndi Kleen
79880970472SSergei Trofimovich# disallow errors like 'EXPORT_GPL(foo);' with missing header
79980970472SSergei TrofimovichKBUILD_CFLAGS   += $(call cc-option,-Werror=implicit-int)
80080970472SSergei Trofimovich
80180970472SSergei Trofimovich# require functions to have arguments in prototypes, not empty 'int foo()'
80280970472SSergei TrofimovichKBUILD_CFLAGS   += $(call cc-option,-Werror=strict-prototypes)
80380970472SSergei Trofimovich
804fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
805fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
806fe7c36c7SJosh Triplett
807ea8daa7bSDaniel Wagner# enforce correct pointer usage
808ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
809ea8daa7bSDaniel Wagner
810c834f0e8SKees Cook# Require designated initializers for all marked structures
811c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
812c834f0e8SKees Cook
81340df759eSMichal Marek# use the deterministic mode of AR if available
81440df759eSMichal MarekKBUILD_ARFLAGS := $(call ar-option,D)
81540df759eSMichal Marek
816a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
817a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
818c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
819a86fe353SMasahiro Yamada
82061754c18SMichal Marek# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
82161754c18SMichal Marek# last assignments
82261754c18SMichal MarekKBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
82361754c18SMichal MarekKBUILD_AFLAGS   += $(ARCH_AFLAGS)   $(KAFLAGS)
82461754c18SMichal MarekKBUILD_CFLAGS   += $(ARCH_CFLAGS)   $(KCFLAGS)
82552bcc330SSam Ravnborg
82618991197SRoland McGrath# Use --build-id when available.
827bd74370bSRabin VincentLDFLAGS_BUILD_ID := $(patsubst -Wl$(comma)%,%,\
828f86fd306SSam Ravnborg			      $(call cc-ldoption, -Wl$(comma)--build-id,))
8296588169dSSam RavnborgKBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
83018991197SRoland McGrathLDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
83118991197SRoland McGrath
832b67067f1SNicholas Pigginifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
833b67067f1SNicholas PigginLDFLAGS_vmlinux	+= $(call ld-option, --gc-sections,)
834b67067f1SNicholas Pigginendif
835b67067f1SNicholas Piggin
8365d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
837d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
8385d7d18f5SDavid Howellsendif
8395d7d18f5SDavid Howells
8401da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
8411da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
8421da177e4SLinus Torvalds# set in the environment
8431da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
8441da177e4SLinus Torvalds# this default value
8451da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
8461da177e4SLinus Torvalds
8471da177e4SLinus Torvalds#
8481da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
8491da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
8501da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
8511da177e4SLinus Torvalds
8521da177e4SLinus Torvalds#
853f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
854f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
855f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
856f4d4ffc0SJason Cooper#
857f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
858f4d4ffc0SJason Cooper
859f4d4ffc0SJason Cooper#
8601da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
8611da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
862070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
8631da177e4SLinus Torvalds#
8641da177e4SLinus Torvalds
865df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
8661da177e4SLinus Torvaldsexport MODLIB
8671da177e4SLinus Torvalds
868ac031f26STheodore Ts'o#
8692ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
8702ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
8712ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
872177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
8732ea03891SSam Ravnborg
874ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
875ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
8762ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
877ac031f26STheodore Ts'oelse
8782ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
879ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
880ac031f26STheodore Ts'oelse
8812ea03891SSam Ravnborgmod_strip_cmd = true
882ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
883ac031f26STheodore Ts'oexport mod_strip_cmd
884ac031f26STheodore Ts'o
885beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
886beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
887beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
888beb50df3SBertrand Jacquin
889beb50df3SBertrand Jacquinmod_compress_cmd = true
890beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
891beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
8923d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
893beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
894beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
8953d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
896beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
897beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
898beb50df3SBertrand Jacquinexport mod_compress_cmd
899beb50df3SBertrand Jacquin
9001bf49dd4SP J P# Select initial ramdisk compression format, default is gzip(1).
9011bf49dd4SP J P# This shall be used by the dracut(8) tool while creating an initramfs image.
9021bf49dd4SP J P#
9037ac18156SJan BeulichINITRD_COMPRESS-y                  := gzip
9047ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
9057ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZMA)  := lzma
9067ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_XZ)    := xz
9077ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZO)   := lzo
9087ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZ4)   := lz4
909b7000adeSLinus Torvalds# do not export INITRD_COMPRESS, since we didn't actually
910b7000adeSLinus Torvalds# choose a sane default compression above.
911b7000adeSLinus Torvalds# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
9121da177e4SLinus Torvalds
913d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
9143ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
9153ee550f1SDavid Woodhouse
9163ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
917e2a666d5SRusty Russellelse
918e2a666d5SRusty Russellmod_sign_cmd = true
919e2a666d5SRusty Russellendif
920e2a666d5SRusty Russellexport mod_sign_cmd
921e2a666d5SRusty Russell
9229f0c18aeSJosh Poimboeufifdef CONFIG_STACK_VALIDATION
9239f0c18aeSJosh Poimboeuf  has_libelf := $(call try-run,\
9249f0c18aeSJosh Poimboeuf		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
9259f0c18aeSJosh Poimboeuf  ifeq ($(has_libelf),1)
9269f0c18aeSJosh Poimboeuf    objtool_target := tools/objtool FORCE
9279f0c18aeSJosh Poimboeuf  else
92811af8474SJosh Poimboeuf    ifdef CONFIG_UNWINDER_ORC
92911af8474SJosh Poimboeuf      $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
9303dd40cb3SJosh Poimboeuf    else
9313dd40cb3SJosh Poimboeuf      $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
9323dd40cb3SJosh Poimboeuf    endif
9339f0c18aeSJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
9349f0c18aeSJosh Poimboeuf    export SKIP_STACK_VALIDATION
9359f0c18aeSJosh Poimboeuf  endif
9369f0c18aeSJosh Poimboeufendif
9379f0c18aeSJosh Poimboeuf
938e2a666d5SRusty Russell
9391da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
940cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
9411da177e4SLinus Torvalds
9421da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
9431da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
94437d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
9451da177e4SLinus Torvalds
9461da177e4SLinus Torvaldsvmlinux-alldirs	:= $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
94737d9fe47SFeng Wu		     $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
9481da177e4SLinus Torvalds
9491da177e4SLinus Torvaldsinit-y		:= $(patsubst %/, %/built-in.o, $(init-y))
9501da177e4SLinus Torvaldscore-y		:= $(patsubst %/, %/built-in.o, $(core-y))
9511da177e4SLinus Torvaldsdrivers-y	:= $(patsubst %/, %/built-in.o, $(drivers-y))
9521da177e4SLinus Torvaldsnet-y		:= $(patsubst %/, %/built-in.o, $(net-y))
9531da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
9543a166fc2SNicholas Pigginlibs-y2		:= $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y)))
95537d9fe47SFeng Wuvirt-y		:= $(patsubst %/, %/built-in.o, $(virt-y))
9561da177e4SLinus Torvalds
9571f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
95895698570SSam Ravnborgexport KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
9593a166fc2SNicholas Pigginexport KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
9603a166fc2SNicholas Pigginexport KBUILD_VMLINUX_LIBS := $(libs-y1)
96195698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
9621f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
963312a3d09SCao jin# used by scripts/package/Makefile
96437d9fe47SFeng Wuexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
9651da177e4SLinus Torvalds
9663a166fc2SNicholas Pigginvmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
9671da177e4SLinus Torvalds
9682441e78bSNicolas Pitre# Include targets which we want to execute sequentially if the rest of the
9692441e78bSNicolas Pitre# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
9702441e78bSNicolas Pitre# evaluated more than once.
9712441e78bSNicolas PitrePHONY += vmlinux_prereq
9722441e78bSNicolas Pitrevmlinux_prereq: $(vmlinux-deps) FORCE
9730f836e5fSDavid Woodhouseifdef CONFIG_HEADERS_CHECK
9740e7af8d0SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
9750f836e5fSDavid Woodhouseendif
9763ee7b3faSJan Kiszkaifdef CONFIG_GDB_SCRIPTS
9778e9b4667SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
9783ee7b3faSJan Kiszkaendif
9792441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
980ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
98186556392SNicolas Pitre	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
9822441e78bSNicolas Pitreendif
98323121ca2SNicolas Pitre
98423121ca2SNicolas Pitre# standalone target for easier testing
98523121ca2SNicolas Pitreinclude/generated/autoksyms.h: FORCE
986ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
98723121ca2SNicolas Pitre
988fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
989fbe6e37dSNicholas Piggin
990fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
991fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
992fbe6e37dSNicholas Piggin	$(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ;    \
993fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
9942441e78bSNicolas Pitre
995edf69470SNicolas Pitrevmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
9961f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
997741f98feSSam Ravnborg
998dd92478aSNicolas Pitre# Build samples along the rest of the kernel
999dd92478aSNicolas Pitreifdef CONFIG_SAMPLES
1000dd92478aSNicolas Pitrevmlinux-dirs += samples
1001dd92478aSNicolas Pitreendif
1002dd92478aSNicolas Pitre
10031da177e4SLinus Torvalds# The actual objects are generated when descending,
10041da177e4SLinus Torvalds# make sure no implicit rule kicks in
10051f2bfbd0SSam Ravnborg$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
10061da177e4SLinus Torvalds
10071da177e4SLinus Torvalds# Handle descending into subdirectories listed in $(vmlinux-dirs)
10081da177e4SLinus Torvalds# Preset locale variables to speed up the build process. Limit locale
10091da177e4SLinus Torvalds# tweaks to this spot to avoid wrong language settings when running
10101da177e4SLinus Torvalds# make menuconfig etc.
10111da177e4SLinus Torvalds# Error messages still appears in the original language
10121da177e4SLinus Torvalds
10134f193362SPaul SmithPHONY += $(vmlinux-dirs)
10145bb78269SSam Ravnborg$(vmlinux-dirs): prepare scripts
1015f7adc312SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ need-builtin=1
10161da177e4SLinus Torvalds
10170d0e7718SMichal Marekdefine filechk_kernel.release
10180d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
10190d0e7718SMichal Marekendef
10200d0e7718SMichal Marek
102183a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
1022f1d28fb0SRoman Zippelinclude/config/kernel.release: include/config/auto.conf FORCE
10230d0e7718SMichal Marek	$(call filechk,kernel.release)
1024cb58455cSSam Ravnborg
1025cb58455cSSam Ravnborg
10261da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
10275bb78269SSam Ravnborg# or the modules are listed in "prepare".
10285bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
10295bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
10305bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
10311da177e4SLinus Torvalds
10325bb78269SSam Ravnborg# Listed in dependency order
10334f193362SPaul SmithPHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
10345bb78269SSam Ravnborg
103586feeaa8SSam Ravnborg# prepare3 is used to check if we are building in a separate output directory,
10361da177e4SLinus Torvalds# and if so do:
10371da177e4SLinus Torvalds# 1) Check that make has not been executed in the kernel src $(srctree)
1038f1d28fb0SRoman Zippelprepare3: include/config/kernel.release
10391da177e4SLinus Torvaldsifneq ($(KBUILD_SRC),)
1040fd54f502SMike Frysinger	@$(kecho) '  Using $(srctree) as source for kernel'
1041c955ccafSRoman Zippel	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
10425369f550SMichal Marek		echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
10435369f550SMichal Marek		echo >&2 "  in the '$(srctree)' directory.";\
10441da177e4SLinus Torvalds		/bin/false; \
10451da177e4SLinus Torvalds	fi;
10461da177e4SLinus Torvaldsendif
10471da177e4SLinus Torvalds
1048c965b105SKees Cook# prepare2 creates a makefile if using a separate output directory.
1049c965b105SKees Cook# From this point forward, .config has been reprocessed, so any rules
1050c965b105SKees Cook# that need to depend on updated CONFIG_* values can be checked here.
1051c965b105SKees Cookprepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
10521da177e4SLinus Torvalds
1053d183e6f5SDavid Howellsprepare1: prepare2 $(version_h) include/generated/utsrelease.h \
1054f7f16b77SSam Ravnborg                   include/config/auto.conf
10557bb9d092SSam Ravnborg	$(cmd_crmodverdir)
10561da177e4SLinus Torvalds
10576520fe55SH. Peter Anvinarchprepare: archheaders archscripts prepare1 scripts_basic
10585bb78269SSam Ravnborg
10596b90bd4bSEmese Revfyprepare0: archprepare gcc-plugins
10608d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
106186feeaa8SSam Ravnborg
10621da177e4SLinus Torvalds# All the preparing..
1063b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1064b9ab5ebbSJosh Poimboeuf
10652c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
10662c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
10672c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
10682c1f4f12SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
10692c1f4f12SMasahiro Yamada	            src=asm obj=arch/$(SRCARCH)/include/generated/asm
10702c1f4f12SMasahiro Yamadauapi-asm-generic:
10712c1f4f12SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
10722c1f4f12SMasahiro Yamada	            src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
10732c1f4f12SMasahiro Yamada
1074b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
10753b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
10761da177e4SLinus Torvalds
1077c965b105SKees Cook# Check for CONFIG flags that require compiler support. Abort the build
1078c965b105SKees Cook# after .config has been processed, but before the kernel build starts.
1079c965b105SKees Cook#
1080c965b105SKees Cook# For security-sensitive CONFIG options, we don't want to fallback and/or
1081c965b105SKees Cook# silently change which compiler flags will be used, since that leads to
1082c965b105SKees Cook# producing kernels with different security feature characteristics
1083c965b105SKees Cook# depending on the compiler used. (For example, "But I selected
1084c965b105SKees Cook# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
1085c965b105SKees CookPHONY += prepare-compiler-check
1086c965b105SKees Cookprepare-compiler-check: FORCE
1087c965b105SKees Cook# Make sure compiler supports requested stack protector flag.
1088c965b105SKees Cookifdef stackp-name
1089c965b105SKees Cook  ifeq ($(call cc-option, $(stackp-flag)),)
1090c965b105SKees Cook	@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1091c965b105SKees Cook		  $(stackp-flag) not supported by compiler >&2 && exit 1
1092c965b105SKees Cook  endif
1093c965b105SKees Cookendif
1094c965b105SKees Cook# Make sure compiler does not have buggy stack-protector support.
1095c965b105SKees Cookifdef stackp-check
1096c965b105SKees Cook  ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
1097c965b105SKees Cook	@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1098c965b105SKees Cook                  $(stackp-flag) available but compiler is broken >&2 && exit 1
1099c965b105SKees Cook  endif
1100c965b105SKees Cookendif
1101c965b105SKees Cook	@:
1102c965b105SKees Cook
11031da177e4SLinus Torvalds# Generate some files
11041da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11051da177e4SLinus Torvalds
11061da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
11071da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
11081da177e4SLinus Torvalds
11091da177e4SLinus Torvaldsuts_len := 64
111063104eecSSam Ravnborgdefine filechk_utsrelease.h
11111da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
11121da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
11131da177e4SLinus Torvalds	  exit 1;                                                         \
11141da177e4SLinus Torvalds	fi;                                                               \
111563104eecSSam Ravnborg	(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
11161da177e4SLinus Torvaldsendef
11171da177e4SLinus Torvalds
111863104eecSSam Ravnborgdefine filechk_version.h
111963104eecSSam Ravnborg	(echo \#define LINUX_VERSION_CODE $(shell                         \
112078d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
112163104eecSSam Ravnborg	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
112263104eecSSam Ravnborgendef
112363104eecSSam Ravnborg
1124d183e6f5SDavid Howells$(version_h): $(srctree)/Makefile FORCE
11251da177e4SLinus Torvalds	$(call filechk,version.h)
1126223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
11271da177e4SLinus Torvalds
1128273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
112963104eecSSam Ravnborg	$(call filechk,utsrelease.h)
113063104eecSSam Ravnborg
1131179efcb4SVegard NossumPHONY += headerdep
1132179efcb4SVegard Nossumheaderdep:
11339663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
11349663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1135179efcb4SVegard Nossum
11361da177e4SLinus Torvalds# ---------------------------------------------------------------------------
11378d730cfbSDavid Woodhouse# Kernel headers
11388d730cfbSDavid Woodhouse
1139e6883b18SSam Ravnborg#Default location for installed headers
1140e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1141e6883b18SSam Ravnborg
11429d022c54SMasahiro Yamada# If we do an all arch process set dst to include/arch-$(SRCARCH)
11439d022c54SMasahiro Yamadahdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include)
1144e6883b18SSam Ravnborg
1145052ad274SH. Peter AnvinPHONY += archheaders
1146052ad274SH. Peter Anvinarchheaders:
1147052ad274SH. Peter Anvin
11486520fe55SH. Peter AnvinPHONY += archscripts
11496520fe55SH. Peter Anvinarchscripts:
11506520fe55SH. Peter Anvin
1151e6883b18SSam RavnborgPHONY += __headers
1152a9d9a400SMasahiro Yamada__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
1153e1b702cfSMike Waychison	$(Q)$(MAKE) $(build)=scripts build_unifdef
11546d716275SDavid Woodhouse
11556d716275SDavid WoodhousePHONY += headers_install_all
11562fb9b1bdSSam Ravnborgheaders_install_all:
11572fb9b1bdSSam Ravnborg	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
11586d716275SDavid Woodhouse
11598d730cfbSDavid WoodhousePHONY += headers_install
1160e6883b18SSam Ravnborgheaders_install: __headers
11619d022c54SMasahiro Yamada	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
11622fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1163a8ff49a1SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
11649d022c54SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst)
11658d730cfbSDavid Woodhouse
11661f85712eSMike FrysingerPHONY += headers_check_all
11671f85712eSMike Frysingerheaders_check_all: headers_install_all
11682fb9b1bdSSam Ravnborg	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
11691f85712eSMike Frysinger
117068475359SDavid WoodhousePHONY += headers_check
117168475359SDavid Woodhouseheaders_check: headers_install
1172a8ff49a1SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
11739d022c54SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
117468475359SDavid Woodhouse
11758d730cfbSDavid Woodhouse# ---------------------------------------------------------------------------
11765a5da78bSShuah Khan# Kernel selftest
11775a5da78bSShuah Khan
11785a5da78bSShuah KhanPHONY += kselftest
11795a5da78bSShuah Khankselftest:
11802bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
11815a5da78bSShuah Khan
1182801d2e9fSShuah KhanPHONY += kselftest-clean
1183dcb825a9SWang Longkselftest-clean:
11842bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
1185dcb825a9SWang Long
11863d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
11873d6dee7aSBamvor Jian Zhangkselftest-merge:
11883d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
11893d6dee7aSBamvor Jian Zhang	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
11903d6dee7aSBamvor Jian Zhang		-m $(objtree)/.config \
11913d6dee7aSBamvor Jian Zhang		$(srctree)/tools/testing/selftests/*/config
11923d6dee7aSBamvor Jian Zhang	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
11933d6dee7aSBamvor Jian Zhang
11945a5da78bSShuah Khan# ---------------------------------------------------------------------------
11951da177e4SLinus Torvalds# Modules
11961da177e4SLinus Torvalds
11971da177e4SLinus Torvaldsifdef CONFIG_MODULES
11981da177e4SLinus Torvalds
11991da177e4SLinus Torvalds# By default, build modules as well
12001da177e4SLinus Torvalds
120173d1393eSMichal Marekall: modules
12021da177e4SLinus Torvalds
12031da177e4SLinus Torvalds# Build modules
1204551559e1STejun Heo#
1205551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1206551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1207551559e1STejun Heo# using awk while concatenating to the final file.
12081da177e4SLinus Torvalds
12094f193362SPaul SmithPHONY += modules
12102da30e70SMichal Marekmodules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1211551559e1STejun Heo	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1212fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1213b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
12141da177e4SLinus Torvalds
1215a6c36632SMichal Marekmodules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1216a6c36632SMichal Marek	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1217a6c36632SMichal Marek
121873d1393eSMichal Marek%/modules.builtin: include/config/auto.conf
1219a6c36632SMichal Marek	$(Q)$(MAKE) $(modbuiltin)=$*
1220a6c36632SMichal Marek
12211da177e4SLinus Torvalds
12221da177e4SLinus Torvalds# Target to prepare building external modules
12234f193362SPaul SmithPHONY += modules_prepare
12245bb78269SSam Ravnborgmodules_prepare: prepare scripts
12251da177e4SLinus Torvalds
12261da177e4SLinus Torvalds# Target to install modules
12274f193362SPaul SmithPHONY += modules_install
12281da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
12291da177e4SLinus Torvalds
12304f193362SPaul SmithPHONY += _modinst_
12312da30e70SMichal Marek_modinst_:
12321da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
12331da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
12341da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
12358e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
12361da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
12371da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
12387e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
12391da177e4SLinus Torvalds	fi
1240551559e1STejun Heo	@cp -f $(objtree)/modules.order $(MODLIB)/
1241bc081dd6SMichal Marek	@cp -f $(objtree)/modules.builtin $(MODLIB)/
1242b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
12431da177e4SLinus Torvalds
124450a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
12451da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
12461da177e4SLinus Torvalds# boot script depmod is the master version.
12474f193362SPaul SmithPHONY += _modinst_post
12486d128e1eSLinus Torvalds_modinst_post: _modinst_
124950a8ec31SSam Ravnborg	$(call cmd,depmod)
12501da177e4SLinus Torvalds
1251d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1252d890f510SJosh BoyerPHONY += modules_sign
1253d890f510SJosh Boyermodules_sign:
1254d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1255d890f510SJosh Boyerendif
1256d890f510SJosh Boyer
12571da177e4SLinus Torvaldselse # CONFIG_MODULES
12581da177e4SLinus Torvalds
12591da177e4SLinus Torvalds# Modules not configured
12601da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12611da177e4SLinus Torvalds
1262612e47ceSMasahiro YamadaPHONY += modules modules_install
1263612e47ceSMasahiro Yamadamodules modules_install:
12645369f550SMichal Marek	@echo >&2
12655369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
12665369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
12675369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
12685369f550SMichal Marek	@echo >&2
12691da177e4SLinus Torvalds	@exit 1
12701da177e4SLinus Torvalds
12711da177e4SLinus Torvaldsendif # CONFIG_MODULES
12721da177e4SLinus Torvalds
12731da177e4SLinus Torvalds###
12741da177e4SLinus Torvalds# Cleaning is done on three levels.
12751da177e4SLinus Torvalds# make clean     Delete most generated files
12761da177e4SLinus Torvalds#                Leave enough to build external modules
12771da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
12781da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
12791da177e4SLinus Torvalds
12801da177e4SLinus Torvalds# Directories & files removed with 'make clean'
12811da177e4SLinus TorvaldsCLEAN_DIRS  += $(MODVERDIR)
12821da177e4SLinus Torvalds
12831da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1284d8ecc5cdSSam RavnborgMRPROPER_DIRS  += include/config usr/include include/generated          \
128579192ca8SJason Cooper		  arch/*/include/generated .tmp_objdiff
1286278ae604SMasahiro YamadaMRPROPER_FILES += .config .config.old .version \
1287d5b71936SRusty Russell		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1288fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1289fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
12903ee7b3faSJan Kiszka		  signing_key.x509.signer vmlinux-gdb.py
12911da177e4SLinus Torvalds
12921da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
12931da177e4SLinus Torvalds#
12941da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
12951da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
1296fb68d4beSGerard Snitselaarclean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
12971da177e4SLinus Torvalds
1298bd1ee804SPawel MollPHONY += $(clean-dirs) clean archclean vmlinuxclean
12991da177e4SLinus Torvalds$(clean-dirs):
13001da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
13011da177e4SLinus Torvalds
1302bd1ee804SPawel Mollvmlinuxclean:
1303bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1304fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1305bd1ee804SPawel Moll
1306bd1ee804SPawel Mollclean: archclean vmlinuxclean
13071da177e4SLinus Torvalds
13081da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
13091da177e4SLinus Torvalds#
13101da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
13111da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1312cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
13131da177e4SLinus Torvalds
13144f193362SPaul SmithPHONY += $(mrproper-dirs) mrproper archmrproper
13151da177e4SLinus Torvalds$(mrproper-dirs):
13161da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
13171da177e4SLinus Torvalds
13181da177e4SLinus Torvaldsmrproper: clean archmrproper $(mrproper-dirs)
13191da177e4SLinus Torvalds	$(call cmd,rmdirs)
13201da177e4SLinus Torvalds	$(call cmd,rmfiles)
13211da177e4SLinus Torvalds
13221da177e4SLinus Torvalds# distclean
13231da177e4SLinus Torvalds#
13244f193362SPaul SmithPHONY += distclean
13251da177e4SLinus Torvalds
13261da177e4SLinus Torvaldsdistclean: mrproper
13271da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
13281da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1329f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
1330f78271dfSMasahiro Yamada		-o -name 'core' \) \
13311da177e4SLinus Torvalds		-type f -print | xargs rm -f
13321da177e4SLinus Torvalds
13331da177e4SLinus Torvalds
13341da177e4SLinus Torvalds# Packaging of the kernel to various formats
13351da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13361da177e4SLinus Torvalds# rpm target kept for backward compatibility
1337c79624c1SMichal Marekpackage-dir	:= scripts/package
13381da177e4SLinus Torvalds
1339bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1340bafb6747SArnaldo Carvalho de Melo	$(Q)$(MAKE) $(build)=$(package-dir) $@
1341031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
13426c2133e1SSam Ravnborg	$(Q)$(MAKE) $(build)=$(package-dir) $@
1343ebaad7d3SMasahiro Yamadarpm: rpm-pkg
1344ebaad7d3SMasahiro Yamada	@echo "  WARNING: \"rpm\" target will be removed after Linux 4.18"
1345ebaad7d3SMasahiro Yamada	@echo "           Please use \"rpm-pkg\" instead."
13461da177e4SLinus Torvalds
13471da177e4SLinus Torvalds
13481da177e4SLinus Torvalds# Brief documentation of the typical targets used
13491da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13501da177e4SLinus Torvalds
13515dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1352a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
13535dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
13545dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
13551da177e4SLinus Torvalds
1356fe69b420SMasahiro YamadaPHONY += help
13571da177e4SLinus Torvaldshelp:
13581da177e4SLinus Torvalds	@echo  'Cleaning targets:'
13595ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
13605cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
13615ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
13625cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
13631da177e4SLinus Torvalds	@echo  ''
13641da177e4SLinus Torvalds	@echo  'Configuration targets:'
13651da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
13661da177e4SLinus Torvalds	@echo  ''
13671da177e4SLinus Torvalds	@echo  'Other generic targets:'
13681da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
13691da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
13701da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
13719cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
13721da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
137340ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1374433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1375433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
137662718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
137762718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1378155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1379c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
13801da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
13811da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1382f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
13833f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
13843f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
13853f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
13862fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
138759df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
13882fb9b1bdSSam Ravnborg	 echo  ''
138931b8cc80SRandy Dunlap	@echo  'Static analysers:'
13901da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
13911da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1392aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1393ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1394295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1395179efcb4SVegard Nossum	@echo  '  headers_check   - Sanity check on exported headers'
139674425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
13977f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
139874425eeeSNicolas Palix	@echo  ''
139931b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
14005a5da78bSShuah Khan	@echo  '  kselftest       - Build and run kernel selftest (run as root)'
14015a5da78bSShuah Khan	@echo  '                    Build, install, and boot kernel before'
14025a5da78bSShuah Khan	@echo  '                    running kselftest on it'
1403dcb825a9SWang Long	@echo  '  kselftest-clean - Remove all generated kselftest files'
1404bbfe63b6SRandy Dunlap	@echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existing'
14053d6dee7aSBamvor Jian Zhang	@echo  '                    .config.'
14065a5da78bSShuah Khan	@echo  ''
140731b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
140831b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
140931b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
141031b8cc80SRandy Dunlap	@echo  ''
14111da177e4SLinus Torvalds	@echo  'Kernel packaging:'
14126c2133e1SSam Ravnborg	@$(MAKE) $(build)=$(package-dir) help
14131da177e4SLinus Torvalds	@echo  ''
14141da177e4SLinus Torvalds	@echo  'Documentation targets:'
1415cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
14161da177e4SLinus Torvalds	@echo  ''
141701dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
14181da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
141901dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
14201da177e4SLinus Torvalds	@echo  ''
14211da177e4SLinus Torvalds	@$(if $(boards), \
14221da177e4SLinus Torvalds		$(foreach b, $(boards), \
14231da177e4SLinus Torvalds		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
14241da177e4SLinus Torvalds		echo '')
14255dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
14265dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
14275dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
14285dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
14295dffbe81SSegher Boessenkool		echo '')
14301da177e4SLinus Torvalds
14311da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
143245d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
14331da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
14349ba26a72SCao jin	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1435701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1436af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
143728bc20dcSSam Ravnborg	@echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
143828bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
143928bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
144028bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1441a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
14421da177e4SLinus Torvalds	@echo  ''
14431da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
14441da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
14451da177e4SLinus Torvalds
14461da177e4SLinus Torvalds
14475dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
14485dffbe81SSegher Boessenkool
14495dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
14505dffbe81SSegher Boessenkool
1451fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
14525dffbe81SSegher Boessenkool
14535dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
14545dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
14555dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
14565dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
14575dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
14585dffbe81SSegher Boessenkool		echo '')
14595dffbe81SSegher Boessenkool
14605dffbe81SSegher Boessenkool
14611da177e4SLinus Torvalds# Documentation targets
14621da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1463e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1464e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
146522cba31bSJani NikulaPHONY += $(DOC_TARGETS)
146622cba31bSJani Nikula$(DOC_TARGETS): scripts_basic FORCE
1467cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
14681da177e4SLinus Torvalds
14691da177e4SLinus Torvaldselse # KBUILD_EXTMOD
14701da177e4SLinus Torvalds
14711da177e4SLinus Torvalds###
14721da177e4SLinus Torvalds# External module support.
14731da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
14741da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
14751da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
14761da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
14771da177e4SLinus Torvalds# be used.
14781da177e4SLinus Torvalds#
14791da177e4SLinus Torvalds# The following are the only valid targets when building external
14801da177e4SLinus Torvalds# modules.
14811da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
14821da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
14831da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
14841da177e4SLinus Torvalds# make M=dir modules_install
1485070b98bfSSam Ravnborg#                      Install the modules built in the module directory
14861da177e4SLinus Torvalds#                      Assumes install directory is already created
14871da177e4SLinus Torvalds
14881da177e4SLinus Torvalds# We are always building modules
14891da177e4SLinus TorvaldsKBUILD_MODULES := 1
14904f193362SPaul SmithPHONY += crmodverdir
14911da177e4SLinus Torvaldscrmodverdir:
14927bb9d092SSam Ravnborg	$(cmd_crmodverdir)
14931da177e4SLinus Torvalds
14944f193362SPaul SmithPHONY += $(objtree)/Module.symvers
14951da177e4SLinus Torvalds$(objtree)/Module.symvers:
14961da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
14971da177e4SLinus Torvalds	echo; \
14981da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
14991da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
15001da177e4SLinus Torvalds	echo )
15011da177e4SLinus Torvalds
15021da177e4SLinus Torvaldsmodule-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
15034f193362SPaul SmithPHONY += $(module-dirs) modules
15041da177e4SLinus Torvalds$(module-dirs): crmodverdir $(objtree)/Module.symvers
15051da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
15061da177e4SLinus Torvalds
15071da177e4SLinus Torvaldsmodules: $(module-dirs)
1508fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1509b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
15101da177e4SLinus Torvalds
15114f193362SPaul SmithPHONY += modules_install
1512a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1513a67dc21aSSam Ravnborg
1514a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
15154f193362SPaul SmithPHONY += _emodinst_
1516a67dc21aSSam Ravnborg_emodinst_:
1517a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1518b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
15191da177e4SLinus Torvalds
15204f193362SPaul SmithPHONY += _emodinst_post
1521a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1522a67dc21aSSam Ravnborg	$(call cmd,depmod)
1523a67dc21aSSam Ravnborg
15241da177e4SLinus Torvaldsclean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
15251da177e4SLinus Torvalds
15264f193362SPaul SmithPHONY += $(clean-dirs) clean
15271da177e4SLinus Torvalds$(clean-dirs):
15281da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
15291da177e4SLinus Torvalds
15301da177e4SLinus Torvaldsclean:	rm-dirs := $(MODVERDIR)
153188d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
15321da177e4SLinus Torvalds
1533fe69b420SMasahiro YamadaPHONY += help
15341da177e4SLinus Torvaldshelp:
15351da177e4SLinus Torvalds	@echo  '  Building external modules.'
15361da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
15371da177e4SLinus Torvalds	@echo  ''
15381da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
15391da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
15401da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
15411da177e4SLinus Torvalds	@echo  ''
154206300b21SSam Ravnborg
154306300b21SSam Ravnborg# Dummies...
15444f193362SPaul SmithPHONY += prepare scripts
154506300b21SSam Ravnborgprepare: ;
154606300b21SSam Ravnborgscripts: ;
15471da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
15481da177e4SLinus Torvalds
154988d7be03SMichal Marekclean: $(clean-dirs)
155088d7be03SMichal Marek	$(call cmd,rmdirs)
155188d7be03SMichal Marek	$(call cmd,rmfiles)
155243f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1553ef46d9b3SMasahiro Yamada		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
155474ce1896SMasahiro Yamada		-o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \
1555ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
1556d523b255SRasmus Villemoes		-o -name '*.su'  \
155788d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
155888d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
155988d7be03SMichal Marek		-o -name modules.builtin -o -name '.tmp_*.o.*' \
15603298b690SDouglas Anderson		-o -name .cache.mk \
15616b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
1562433db3e2SVinícius Tinti		-o -name '*.ll' \
156388d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
156488d7be03SMichal Marek
15651da177e4SLinus Torvalds# Generate tags for editors
15661da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1567a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1568a680eedcSSam Ravnborg      cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
15691da177e4SLinus Torvalds
1570f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
15711da177e4SLinus Torvalds	$(call cmd,tags)
15721da177e4SLinus Torvalds
15731da177e4SLinus Torvalds# Scripts to check various things for consistency
15741da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15751da177e4SLinus Torvalds
1576279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1577279f3dd3SPeter Foley
15781da177e4SLinus Torvaldsincludecheck:
1579436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
15801da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
158180007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
15821da177e4SLinus Torvalds
15831da177e4SLinus Torvaldsversioncheck:
15842ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
15851da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
158680007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
15871da177e4SLinus Torvalds
158874425eeeSNicolas Palixcoccicheck:
158974425eeeSNicolas Palix	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
159074425eeeSNicolas Palix
15911da177e4SLinus Torvaldsnamespacecheck:
15921da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
15931da177e4SLinus Torvalds
1594295ac051SAdrian Bunkexport_report:
1595295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1596295ac051SAdrian Bunk
15971da177e4SLinus Torvaldsendif #ifeq ($(config-targets),1)
15981da177e4SLinus Torvaldsendif #ifeq ($(mixed-targets),1)
15991da177e4SLinus Torvalds
1600c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1601e3ccf6e3SJeff Dike
1602011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1603011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1604011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1605011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1606011e3a9aSJeff Dikeifeq ($(ARCH), um)
1607011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1608011e3a9aSJeff Dikeelse
1609011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1610011e3a9aSJeff Dikeendif
16111da177e4SLinus Torvaldscheckstack:
16121da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1613011e3a9aSJeff Dike	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
16141da177e4SLinus Torvalds
16157b8ea53dSAmerigo Wangkernelrelease:
16167b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
161701ab1788SAmerigo Wang
1618cb58455cSSam Ravnborgkernelversion:
16192244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
16201da177e4SLinus Torvalds
1621c398ff00SMike Marciniszynimage_name:
1622c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1623c398ff00SMike Marciniszyn
1624ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1625ea01fa9fSBorislav Petkovtools/: FORCE
1626bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
16278e9b4667SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
1628ea01fa9fSBorislav Petkov
1629ea01fa9fSBorislav Petkovtools/%: FORCE
1630bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
16318e9b4667SMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
1632ea01fa9fSBorislav Petkov
163306300b21SSam Ravnborg# Single targets
163406300b21SSam Ravnborg# ---------------------------------------------------------------------------
1635bc2546a6SSam Ravnborg# Single targets are compatible with:
1636e1b8513dSRobert P. J. Day# - build with mixed source and output
1637bc2546a6SSam Ravnborg# - build with separate output dir 'make O=...'
1638bc2546a6SSam Ravnborg# - external modules
1639bc2546a6SSam Ravnborg#
1640bc2546a6SSam Ravnborg#  target-dir => where to store outputfile
1641bc2546a6SSam Ravnborg#  build-dir  => directory in kernel source tree to use
164206300b21SSam Ravnborg
164306300b21SSam Ravnborgifeq ($(KBUILD_EXTMOD),)
1644aa360879SSam Ravnborg        build-dir  = $(patsubst %/,%,$(dir $@))
1645bc2546a6SSam Ravnborg        target-dir = $(dir $@)
164606300b21SSam Ravnborgelse
164706300b21SSam Ravnborg        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1648bc2546a6SSam Ravnborg        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1649bc2546a6SSam Ravnborg        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
165006300b21SSam Ravnborgendif
165106300b21SSam Ravnborg
1652bc2546a6SSam Ravnborg%.s: %.c prepare scripts FORCE
1653bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1654bc2546a6SSam Ravnborg%.i: %.c prepare scripts FORCE
1655bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1656bc2546a6SSam Ravnborg%.o: %.c prepare scripts FORCE
1657bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1658bc2546a6SSam Ravnborg%.lst: %.c prepare scripts FORCE
1659bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1660bc2546a6SSam Ravnborg%.s: %.S prepare scripts FORCE
1661bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1662bc2546a6SSam Ravnborg%.o: %.S prepare scripts FORCE
1663bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
166415fde675SAndreas Gruenbacher%.symtypes: %.c prepare scripts FORCE
166515fde675SAndreas Gruenbacher	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1666433db3e2SVinícius Tinti%.ll: %.c prepare scripts FORCE
1667433db3e2SVinícius Tinti	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1668bc2546a6SSam Ravnborg
1669bc2546a6SSam Ravnborg# Modules
167031110ebbSSam Ravnborg/: prepare scripts FORCE
167131110ebbSSam Ravnborg	$(cmd_crmodverdir)
167231110ebbSSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
167331110ebbSSam Ravnborg	$(build)=$(build-dir)
16748e2faea8SPeter Foley# Make sure the latest headers are built for Documentation
1675ddea05faSArnd BergmannDocumentation/ samples/: headers_install
167631110ebbSSam Ravnborg%/: prepare scripts FORCE
16777bb9d092SSam Ravnborg	$(cmd_crmodverdir)
167806300b21SSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1679bc2546a6SSam Ravnborg	$(build)=$(build-dir)
1680bc2546a6SSam Ravnborg%.ko: prepare scripts FORCE
16817bb9d092SSam Ravnborg	$(cmd_crmodverdir)
168206300b21SSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1683bc2546a6SSam Ravnborg	$(build)=$(build-dir) $(@:.ko=.o)
1684b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
168506300b21SSam Ravnborg
16861da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
16871da177e4SLinus Torvalds# ===========================================================================
16881da177e4SLinus Torvalds
16891da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
16901da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
16911da177e4SLinus Torvalds
16921da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
16931da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
16941da177e4SLinus Torvalds
1695bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
169650a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1697569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1698b92021b0SRusty Russell                   $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
169950a8ec31SSam Ravnborg
17007bb9d092SSam Ravnborg# Create temporary dir for module support files
1701ab19f879SSam Ravnborg# clean it up only when building all modules
1702ab19f879SSam Ravnborgcmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1703ab19f879SSam Ravnborg                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
17041da177e4SLinus Torvalds
17051da177e4SLinus Torvalds# read all saved command lines
17061da177e4SLinus Torvalds
17072982c953SMasahiro Yamadacmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
17081da177e4SLinus Torvalds
17091da177e4SLinus Torvaldsifneq ($(cmd_files),)
17101da177e4SLinus Torvalds  $(cmd_files): ;	# Do not try to update included dependency files
17111da177e4SLinus Torvalds  include $(cmd_files)
17121da177e4SLinus Torvaldsendif
17131da177e4SLinus Torvalds
17141da177e4SLinus Torvaldsendif	# skip-makefile
17151da177e4SLinus Torvalds
17164f193362SPaul SmithPHONY += FORCE
17171da177e4SLinus TorvaldsFORCE:
17184f193362SPaul Smith
17194f193362SPaul Smith# Declare the contents of the .PHONY variable as phony.  We keep that
1720fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
17214f193362SPaul Smith.PHONY: $(PHONY)
1722