xref: /openbmc/linux/Makefile (revision a76bcf55)
1c517d838SLinus TorvaldsVERSION = 4
21001354cSLinus TorvaldsPATCHLEVEL = 9
355922c9dSLinus TorvaldsSUBLEVEL = 0
4bc33b0caSLinus TorvaldsEXTRAVERSION = -rc4
51a695a90SLinus TorvaldsNAME = Psychotic Stoned Sheep
61da177e4SLinus Torvalds
71da177e4SLinus Torvalds# *DOCUMENTATION*
81da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
91da177e4SLinus Torvalds# More info can be located in ./README
101da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
111da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
121da177e4SLinus Torvalds
13a436bb7bSMasahiro Yamada# o Do not use make's built-in rules and variables
14d384e35aSLinus Nilsson#   (this increases performance and avoids hard-to-debug behaviour);
15a436bb7bSMasahiro Yamada# o Look for make include files relative to root of kernel src
16a436bb7bSMasahiro YamadaMAKEFLAGS += -rR --include-dir=$(CURDIR)
171da177e4SLinus Torvalds
18c051346bSH. Peter Anvin# Avoid funny character set dependencies
1906b5dc64SH. Peter Anvinunexport LC_ALL
20c051346bSH. Peter AnvinLC_COLLATE=C
21c051346bSH. Peter AnvinLC_NUMERIC=C
2207105202SMichal Marekexport LC_COLLATE LC_NUMERIC
23c051346bSH. Peter Anvin
24ab7474eaSBorislav Petkov# Avoid interference with shell env settings
25ab7474eaSBorislav Petkovunexport GREP_OPTIONS
26ab7474eaSBorislav Petkov
271da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
281da177e4SLinus Torvalds# to get the ordering right.
291da177e4SLinus Torvalds#
301da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
311da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
321da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
331da177e4SLinus Torvalds# unavoidable when linking the built-in.o targets which finally
341da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
351da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
361da177e4SLinus Torvalds# is now up to date.
371da177e4SLinus Torvalds#
381da177e4SLinus Torvalds# The only cases where we need to modify files which have global
391da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
401da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
411da177e4SLinus Torvalds# prepare rule.
421da177e4SLinus Torvalds
43066b7ed9SMichal Marek# Beautify output
44066b7ed9SMichal Marek# ---------------------------------------------------------------------------
45066b7ed9SMichal Marek#
46066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
47066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
48066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
49066b7ed9SMichal Marek#
50066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
51066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
52066b7ed9SMichal Marek#
53066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
54066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
55066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
56066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
57066b7ed9SMichal Marek#
58066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
59066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
60066b7ed9SMichal Marek#
61066b7ed9SMichal Marek#	$(Q)ln $@ :<
62066b7ed9SMichal Marek#
63066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
64066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
65066b7ed9SMichal Marek#
661da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
671da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
681da177e4SLinus Torvalds
691da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
701da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
711da177e4SLinus Torvaldsendif
721da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
731da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
741da177e4SLinus Torvaldsendif
751da177e4SLinus Torvalds
76066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
77066b7ed9SMichal Marek  quiet =
78066b7ed9SMichal Marek  Q =
79066b7ed9SMichal Marekelse
80066b7ed9SMichal Marek  quiet=quiet_
81066b7ed9SMichal Marek  Q = @
82066b7ed9SMichal Marekendif
83066b7ed9SMichal Marek
84066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
85066b7ed9SMichal Marek# commands
86066b7ed9SMichal Marek
87066b7ed9SMichal Marekifneq ($(filter 4.%,$(MAKE_VERSION)),)	# make-4
88066b7ed9SMichal Marekifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
89066b7ed9SMichal Marek  quiet=silent_
90066b7ed9SMichal Marekendif
91066b7ed9SMichal Marekelse					# make-3.8x
92066b7ed9SMichal Marekifneq ($(filter s% -s%,$(MAKEFLAGS)),)
93066b7ed9SMichal Marek  quiet=silent_
94066b7ed9SMichal Marekendif
95066b7ed9SMichal Marekendif
96066b7ed9SMichal Marek
97066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
98066b7ed9SMichal Marek
991da177e4SLinus Torvalds# kbuild supports saving output files in a separate directory.
1001da177e4SLinus Torvalds# To locate output files in a separate directory two syntaxes are supported.
1011da177e4SLinus Torvalds# In both cases the working directory must be the root of the kernel src.
1021da177e4SLinus Torvalds# 1) O=
1031da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1041da177e4SLinus Torvalds#
1051da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
1061da177e4SLinus Torvalds# Set the environment variable KBUILD_OUTPUT to point to the directory
1071da177e4SLinus Torvalds# where the output files shall be placed.
1081da177e4SLinus Torvalds# export KBUILD_OUTPUT=dir/to/store/output/files/
1091da177e4SLinus Torvalds# make
1101da177e4SLinus Torvalds#
1111da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1121da177e4SLinus Torvalds# variable.
1131da177e4SLinus Torvalds
1141da177e4SLinus Torvalds# KBUILD_SRC is set on invocation of make in OBJ directory
1151da177e4SLinus Torvalds# KBUILD_SRC is not intended to be used by the regular user (for now)
1161da177e4SLinus Torvaldsifeq ($(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 := $(O)
1221da177e4SLinus Torvaldsendif
1231da177e4SLinus Torvalds
1241da177e4SLinus Torvalds# That's our default target when none is given on the command line
1254f193362SPaul SmithPHONY := _all
1261da177e4SLinus Torvalds_all:
1271da177e4SLinus Torvalds
1281cacc9abSSam Ravnborg# Cancel implicit rules on top Makefile
1291cacc9abSSam Ravnborg$(CURDIR)/Makefile Makefile: ;
1301cacc9abSSam Ravnborg
13151193b76SRobert Jarzmikifneq ($(words $(subst :, ,$(CURDIR))), 1)
13251193b76SRobert Jarzmik  $(error main directory cannot contain spaces nor colons)
13351193b76SRobert Jarzmikendif
13451193b76SRobert Jarzmik
1351da177e4SLinus Torvaldsifneq ($(KBUILD_OUTPUT),)
1361da177e4SLinus Torvalds# Invoke a second make in the output directory, passing relevant variables
1371da177e4SLinus Torvalds# check that the output directory actually exists
1381da177e4SLinus Torvaldssaved-output := $(KBUILD_OUTPUT)
1391c9e70a5SMasahiro YamadaKBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
1401c9e70a5SMasahiro Yamada								&& /bin/pwd)
1411da177e4SLinus Torvalds$(if $(KBUILD_OUTPUT),, \
1421c9e70a5SMasahiro Yamada     $(error failed to create output directory "$(saved-output)"))
1431da177e4SLinus Torvalds
1440b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
1450b35786dSMilton Miller
1461cacc9abSSam Ravnborg$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
14716f89098SCharles Keepax	@:
1480b35786dSMilton Miller
1492e8d696bSMasahiro Yamadasub-make:
150745a2543SMasahiro Yamada	$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
151aa55c8e2SMasahiro Yamada	-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
1521da177e4SLinus Torvalds
1531da177e4SLinus Torvalds# Leave processing to above invocation of make
1541da177e4SLinus Torvaldsskip-makefile := 1
1551da177e4SLinus Torvaldsendif # ifneq ($(KBUILD_OUTPUT),)
1561da177e4SLinus Torvaldsendif # ifeq ($(KBUILD_SRC),)
1571da177e4SLinus Torvalds
1581da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
1591da177e4SLinus Torvaldsifeq ($(skip-makefile),)
1601da177e4SLinus Torvalds
1617ff52571SMasahiro Yamada# Do not print "Entering directory ...",
1627ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
1637ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
1647ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
1657ff52571SMasahiro Yamada
166aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
167aa55c8e2SMasahiro Yamada# C compilation.
168aa55c8e2SMasahiro Yamada#
169aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
170aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
171aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
172aa55c8e2SMasahiro Yamada#
173aa55c8e2SMasahiro Yamada# See the file "Documentation/sparse.txt" for more details, including
174aa55c8e2SMasahiro Yamada# where to get the "sparse" utility.
175aa55c8e2SMasahiro Yamada
176aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
177aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
178aa55c8e2SMasahiro Yamadaendif
179aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
180aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
181aa55c8e2SMasahiro Yamadaendif
182aa55c8e2SMasahiro Yamada
183aa55c8e2SMasahiro Yamada# Use make M=dir to specify directory of external module to build
184aa55c8e2SMasahiro Yamada# Old syntax make ... SUBDIRS=$PWD is still supported
185aa55c8e2SMasahiro Yamada# Setting the environment variable KBUILD_EXTMOD take precedence
186aa55c8e2SMasahiro Yamadaifdef SUBDIRS
187aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD ?= $(SUBDIRS)
188aa55c8e2SMasahiro Yamadaendif
189aa55c8e2SMasahiro Yamada
190aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
191aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
192aa55c8e2SMasahiro Yamadaendif
193aa55c8e2SMasahiro Yamada
1941da177e4SLinus Torvalds# If building an external module we do not care about the all: rule
1951da177e4SLinus Torvalds# but instead _all depend on modules
1964f193362SPaul SmithPHONY += all
1971da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
1981da177e4SLinus Torvalds_all: all
1991da177e4SLinus Torvaldselse
2001da177e4SLinus Torvalds_all: modules
2011da177e4SLinus Torvaldsendif
2021da177e4SLinus Torvalds
2039da0763bSMichal Marekifeq ($(KBUILD_SRC),)
2049da0763bSMichal Marek        # building in the source tree
2059da0763bSMichal Marek        srctree := .
2069da0763bSMichal Marekelse
2079da0763bSMichal Marek        ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
2089da0763bSMichal Marek                # building in a subdirectory of the source tree
2099da0763bSMichal Marek                srctree := ..
2109da0763bSMichal Marek        else
2119da0763bSMichal Marek                srctree := $(KBUILD_SRC)
2129da0763bSMichal Marek        endif
2139da0763bSMichal Marekendif
2147e1c0477SMichal Marekobjtree		:= .
2151da177e4SLinus Torvaldssrc		:= $(srctree)
2161da177e4SLinus Torvaldsobj		:= $(objtree)
2171da177e4SLinus Torvalds
2180f558c33SMattia DongiliVPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
2191da177e4SLinus Torvalds
22011294235SAmerigo Wangexport srctree objtree VPATH
2211da177e4SLinus Torvalds
2221da177e4SLinus Torvalds# SUBARCH tells the usermode build what the underlying arch is.  That is set
2231da177e4SLinus Torvalds# first, and if a usermode build is happening, the "ARCH=um" on the command
2241da177e4SLinus Torvalds# line overrides the setting of ARCH below.  If a native build is happening,
2251da177e4SLinus Torvalds# then ARCH is assigned, getting whatever value it gets normally, and
2261da177e4SLinus Torvalds# SUBARCH is subsequently ignored.
2271da177e4SLinus Torvalds
228ffee0de4SDavid WoodhouseSUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
229ffee0de4SDavid Woodhouse				  -e s/sun4u/sparc64/ \
2301da177e4SLinus Torvalds				  -e s/arm.*/arm/ -e s/sa110/arm/ \
23139990b5eSLinus Torvalds				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
232236b1957SPaul Mundt				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
233f1b99392SWill Deacon				  -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
2341da177e4SLinus Torvalds
2351da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
2361da177e4SLinus Torvalds# ---------------------------------------------------------------------------
2371da177e4SLinus Torvalds#
2381da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
2391da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
2401da177e4SLinus Torvalds# ARCH can be set during invocation of make:
2411da177e4SLinus Torvalds# make ARCH=ia64
2421da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
2431da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
2441da177e4SLinus Torvalds
2451da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
2461da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
2471da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
2481da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
2491da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
2501da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
25184336466SRoland McGrath# A third alternative is to store a setting in .config so that plain
25284336466SRoland McGrath# "make" in the configured kernel build directory always uses that.
2531da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
2541da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
2552331d1a6SSam RavnborgARCH		?= $(SUBARCH)
25684336466SRoland McGrathCROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
2571da177e4SLinus Torvalds
2581da177e4SLinus Torvalds# Architecture as present in compile.h
2591da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
2606752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
2611da177e4SLinus Torvalds
262d746d647SSam Ravnborg# Additional ARCH settings for x86
263d746d647SSam Ravnborgifeq ($(ARCH),i386)
264d746d647SSam Ravnborg        SRCARCH := x86
265d746d647SSam Ravnborgendif
266d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
267d746d647SSam Ravnborg        SRCARCH := x86
268d746d647SSam Ravnborgendif
26974b469f2SSam Ravnborg
2705e538790SSam Ravnborg# Additional ARCH settings for sparc
271e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
272e69f58c0SNamhyung Kim       SRCARCH := sparc
273e69f58c0SNamhyung Kimendif
274a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
2755e538790SSam Ravnborg       SRCARCH := sparc
276a439fe51SSam Ravnborgendif
2772fb9b1bdSSam Ravnborg
2783cc000b5SPaul Mundt# Additional ARCH settings for sh
2793cc000b5SPaul Mundtifeq ($(ARCH),sh64)
2803cc000b5SPaul Mundt       SRCARCH := sh
2813cc000b5SPaul Mundtendif
2823cc000b5SPaul Mundt
28318aecc2bSChris Metcalf# Additional ARCH settings for tile
2846738d321SChris Metcalfifeq ($(ARCH),tilepro)
2856738d321SChris Metcalf       SRCARCH := tile
2866738d321SChris Metcalfendif
28718aecc2bSChris Metcalfifeq ($(ARCH),tilegx)
28818aecc2bSChris Metcalf       SRCARCH := tile
28918aecc2bSChris Metcalfendif
29018aecc2bSChris Metcalf
2915e538790SSam Ravnborg# Where to locate arch specific headers
2925e538790SSam Ravnborghdr-arch  := $(SRCARCH)
2935e538790SSam Ravnborg
29414cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
29541263fc6SBen Gardinerexport KCONFIG_CONFIG
29614cdd3c4SRoman Zippel
2971da177e4SLinus Torvalds# SHELL used by kbuild
2981da177e4SLinus TorvaldsCONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
2991da177e4SLinus Torvalds	  else if [ -x /bin/bash ]; then echo /bin/bash; \
3001da177e4SLinus Torvalds	  else echo sh; fi ; fi)
3011da177e4SLinus Torvalds
3021da177e4SLinus TorvaldsHOSTCC       = gcc
3031da177e4SLinus TorvaldsHOSTCXX      = g++
30451b97e35SKirill A. ShutemovHOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
3051da177e4SLinus TorvaldsHOSTCXXFLAGS = -O2
3061da177e4SLinus Torvalds
30761163efaSBehan Websterifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
30861163efaSBehan WebsterHOSTCFLAGS  += -Wno-unused-value -Wno-unused-parameter \
30961163efaSBehan Webster		-Wno-missing-field-initializers -fno-delete-null-pointer-checks
31061163efaSBehan Websterendif
31161163efaSBehan Webster
3121da177e4SLinus Torvalds# Decide whether to build built-in, modular, or both.
3131da177e4SLinus Torvalds# Normally, just do built-in.
3141da177e4SLinus Torvalds
3151da177e4SLinus TorvaldsKBUILD_MODULES :=
3161da177e4SLinus TorvaldsKBUILD_BUILTIN := 1
3171da177e4SLinus Torvalds
3181da177e4SLinus Torvalds# If we have only "make modules", don't compile built-in objects.
3191da177e4SLinus Torvalds# When we're building modules with modversions, we need to consider
3201da177e4SLinus Torvalds# the built-in objects during the descend as well, in order to
3211da177e4SLinus Torvalds# make sure the checksums are up to date before we record them.
3221da177e4SLinus Torvalds
3231da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),modules)
3241da177e4SLinus Torvalds  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
3251da177e4SLinus Torvaldsendif
3261da177e4SLinus Torvalds
3271da177e4SLinus Torvalds# If we have "make <whatever> modules", compile modules
3281da177e4SLinus Torvalds# in addition to whatever we do anyway.
3291da177e4SLinus Torvalds# Just "make" or "make all" shall build modules as well
3301da177e4SLinus Torvalds
3311da177e4SLinus Torvaldsifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
3321da177e4SLinus Torvalds  KBUILD_MODULES := 1
3331da177e4SLinus Torvaldsendif
3341da177e4SLinus Torvalds
3351da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),)
3361da177e4SLinus Torvalds  KBUILD_MODULES := 1
3371da177e4SLinus Torvaldsendif
3381da177e4SLinus Torvalds
339e579d351SSam Ravnborgexport KBUILD_MODULES KBUILD_BUILTIN
3401da177e4SLinus Torvaldsexport KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
3411da177e4SLinus Torvalds
3421cacc9abSSam Ravnborg# We need some generic definitions (do not try to remake the file).
343a436bb7bSMasahiro Yamadascripts/Kbuild.include: ;
344a436bb7bSMasahiro Yamadainclude scripts/Kbuild.include
3458ec4b4ffSSam Ravnborg
3461da177e4SLinus Torvalds# Make variables (CC, etc...)
3471da177e4SLinus TorvaldsAS		= $(CROSS_COMPILE)as
3481da177e4SLinus TorvaldsLD		= $(CROSS_COMPILE)ld
3491da177e4SLinus TorvaldsCC		= $(CROSS_COMPILE)gcc
3501da177e4SLinus TorvaldsCPP		= $(CC) -E
3511da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
3521da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
3531da177e4SLinus TorvaldsSTRIP		= $(CROSS_COMPILE)strip
3541da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
3551da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
3561da177e4SLinus TorvaldsAWK		= awk
3571da177e4SLinus TorvaldsGENKSYMS	= scripts/genksyms/genksyms
358caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
3591da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
3601da177e4SLinus TorvaldsPERL		= perl
361011bf125SMasahiro YamadaPYTHON		= python
3621da177e4SLinus TorvaldsCHECK		= sparse
3631da177e4SLinus Torvalds
36480a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
36580a7d1d9SHannes Eder		  -Wbitwise -Wno-return-void $(CF)
366b36fad65SMichal MarekNOSTDINC_FLAGS  =
3676588169dSSam RavnborgCFLAGS_MODULE   =
3686588169dSSam RavnborgAFLAGS_MODULE   =
3696588169dSSam RavnborgLDFLAGS_MODULE  =
3701da177e4SLinus TorvaldsCFLAGS_KERNEL	=
3711da177e4SLinus TorvaldsAFLAGS_KERNEL	=
372b36fad65SMichal MarekLDFLAGS_vmlinux =
373*a76bcf55SArnd BergmannCFLAGS_GCOV	= -fprofile-arcs -ftest-coverage -fno-tree-loop-im -Wno-maybe-uninitialized
374543c37cbSEmese RevfyCFLAGS_KCOV	:= $(call cc-option,-fsanitize-coverage=trace-pc,)
3751da177e4SLinus Torvalds
3761da177e4SLinus Torvalds
377abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
378abbf1590SDavid HowellsUSERINCLUDE    := \
379abbf1590SDavid Howells		-I$(srctree)/arch/$(hdr-arch)/include/uapi \
3803308b285SArnd Bergmann		-I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
381abbf1590SDavid Howells		-I$(srctree)/include/uapi \
3823308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
383abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
384abbf1590SDavid Howells
3851da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
3861da177e4SLinus Torvalds# Needed to be compatible with the O= option
387abbf1590SDavid HowellsLINUXINCLUDE    := \
388abbf1590SDavid Howells		-I$(srctree)/arch/$(hdr-arch)/include \
3893308b285SArnd Bergmann		-I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
3903308b285SArnd Bergmann		-I$(objtree)/arch/$(hdr-arch)/include/generated \
39196f13045SSam Ravnborg		$(if $(KBUILD_SRC), -I$(srctree)/include) \
3923308b285SArnd Bergmann		-I$(objtree)/include
393dc33db7cSArnd Bergmann
394dc33db7cSArnd BergmannLINUXINCLUDE	+= $(filter-out $(LINUXINCLUDE),$(USERINCLUDE))
3951da177e4SLinus Torvalds
396d8672b40SSam RavnborgKBUILD_CPPFLAGS := -D__KERNEL__
3971da177e4SLinus Torvalds
398a0f97e06SSam RavnborgKBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
39994bed2a9SDave Jones		   -fno-strict-aliasing -fno-common \
400a8735821SFloris Kraak		   -Werror-implicit-function-declaration \
40151b97e35SKirill A. Shutemov		   -Wno-format-security \
40251b97e35SKirill A. Shutemov		   -std=gnu89
403a1c48bb1SGeert Uytterhoeven
40480c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
40580c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
406222d394dSSam RavnborgKBUILD_AFLAGS   := -D__ASSEMBLY__
4076588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
4086588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
4096588169dSSam RavnborgKBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
4101da177e4SLinus Torvalds
411f1d28fb0SRoman Zippel# Read KERNELRELEASE from include/config/kernel.release (if it exists)
412f1d28fb0SRoman ZippelKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
413cacd54efSMichal MarekKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
414cb58455cSSam Ravnborg
415070b98bfSSam Ravnborgexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
41680ef88d6SSam Ravnborgexport ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
417caa27b66SSam Ravnborgexport CPP AR NM STRIP OBJCOPY OBJDUMP
418011bf125SMasahiro Yamadaexport MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
419070b98bfSSam Ravnborgexport HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
4201da177e4SLinus Torvalds
42106c5040cSSam Ravnborgexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
4225c9a8750SDmitry Vyukovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN
423222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
4246588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
42580c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
42640df759eSMichal Marekexport KBUILD_ARFLAGS
4271da177e4SLinus Torvalds
4281da177e4SLinus Torvalds# When compiling out-of-tree modules, put MODVERDIR in the module
4291da177e4SLinus Torvalds# tree rather than in the kernel tree. The kernel tree might
4301da177e4SLinus Torvalds# even be read-only.
4311da177e4SLinus Torvaldsexport MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
4321da177e4SLinus Torvalds
4331da177e4SLinus Torvalds# Files to ignore in find ... statements
4341da177e4SLinus Torvalds
435ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
436ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
437ae63b2d7SPrarit Bhargava			  -prune -o
438450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
439450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
4401da177e4SLinus Torvalds
4411da177e4SLinus Torvalds# ===========================================================================
4421da177e4SLinus Torvalds# Rules shared between *config targets and build targets
4431da177e4SLinus Torvalds
4441da177e4SLinus Torvalds# Basic helpers built in scripts/
4454f193362SPaul SmithPHONY += scripts_basic
4461da177e4SLinus Torvaldsscripts_basic:
4471da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
448638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
4491da177e4SLinus Torvalds
450cd05e6bdSJan Beulich# To avoid any implicit rule to kick in, define an empty command.
451cd05e6bdSJan Beulichscripts/basic/%: scripts_basic ;
452cd05e6bdSJan Beulich
4534f193362SPaul SmithPHONY += outputmakefile
454fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
455fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
456fd5f0cd6SJan Beulich# output directory.
4571da177e4SLinus Torvaldsoutputmakefile:
458fd5f0cd6SJan Beulichifneq ($(KBUILD_SRC),)
45992979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
460fd5f0cd6SJan Beulich	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
461fd5f0cd6SJan Beulich	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
462fd5f0cd6SJan Beulichendif
4631da177e4SLinus Torvalds
464d8ecc5cdSSam Ravnborg# Support for using generic headers in asm-generic
465d8ecc5cdSSam RavnborgPHONY += asm-generic
466d8ecc5cdSSam Ravnborgasm-generic:
467d8ecc5cdSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
4683c5994c8SCatalin Marinas	            src=asm obj=arch/$(SRCARCH)/include/generated/asm
4693c5994c8SCatalin Marinas	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
4703c5994c8SCatalin Marinas	            src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
471d8ecc5cdSSam Ravnborg
4721da177e4SLinus Torvalds# To make sure we do not include .config for any of the *config targets
4731da177e4SLinus Torvalds# catch them early, and hand them over to scripts/kconfig/Makefile
4741da177e4SLinus Torvalds# It is allowed to specify more targets when calling make, including
4751da177e4SLinus Torvalds# mixing *config targets and build targets.
4761da177e4SLinus Torvalds# For example 'make oldconfig all'.
4771da177e4SLinus Torvalds# Detect when mixed targets is specified, and make a second invocation
4781da177e4SLinus Torvalds# of make so .config is not included in this case either (for *config).
4791da177e4SLinus Torvalds
48010b63956SDavid Howellsversion_h := include/generated/uapi/linux/version.h
481223c24a7SMichal Marekold_version_h := include/linux/version.h
482d183e6f5SDavid Howells
4833eb3c740SRoman Zippelno-dot-config-targets := clean mrproper distclean \
484fbae4d58SMichal Marek			 cscope gtags TAGS tags help% %docs check% coccicheck \
485d183e6f5SDavid Howells			 $(version_h) headers_% archheaders archscripts \
4864aed2fd8SLinus Torvalds			 kernelversion %src-pkg
4871da177e4SLinus Torvalds
4881da177e4SLinus Torvaldsconfig-targets := 0
4891da177e4SLinus Torvaldsmixed-targets  := 0
4901da177e4SLinus Torvaldsdot-config     := 1
4911da177e4SLinus Torvalds
4921da177e4SLinus Torvaldsifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
4931da177e4SLinus Torvalds	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
4941da177e4SLinus Torvalds		dot-config := 0
4951da177e4SLinus Torvalds	endif
4961da177e4SLinus Torvaldsendif
4971da177e4SLinus Torvalds
4981da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
4991da177e4SLinus Torvalds        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
5001da177e4SLinus Torvalds                config-targets := 1
501d0d38cd9SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
5021da177e4SLinus Torvalds                        mixed-targets := 1
5031da177e4SLinus Torvalds                endif
5041da177e4SLinus Torvalds        endif
5051da177e4SLinus Torvaldsendif
506a85a41edSMichal Marek# install and module_install need also be processed one by one
507a85a41edSMichal Marekifneq ($(filter install,$(MAKECMDGOALS)),)
508a85a41edSMichal Marek        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
509a85a41edSMichal Marek	        mixed-targets := 1
510a85a41edSMichal Marek        endif
511a85a41edSMichal Marekendif
5121da177e4SLinus Torvalds
5131da177e4SLinus Torvaldsifeq ($(mixed-targets),1)
5141da177e4SLinus Torvalds# ===========================================================================
5151da177e4SLinus Torvalds# We're called with mixed targets (*config and build targets).
5161da177e4SLinus Torvalds# Handle them one by one.
5171da177e4SLinus Torvalds
5189319f453SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
5199319f453SMasahiro Yamada
5209319f453SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
5219319f453SMasahiro Yamada	@:
5229319f453SMasahiro Yamada
5239319f453SMasahiro Yamada__build_one_by_one:
5249319f453SMasahiro Yamada	$(Q)set -e; \
5259319f453SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
5269319f453SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
5279319f453SMasahiro Yamada	done
5281da177e4SLinus Torvalds
5291da177e4SLinus Torvaldselse
5301da177e4SLinus Torvaldsifeq ($(config-targets),1)
5311da177e4SLinus Torvalds# ===========================================================================
5321da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
5331da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
5341da177e4SLinus Torvalds
5351da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
5361da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
5371da177e4SLinus Torvalds# used for 'make defconfig'
538a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
53961bee204SAl Viroexport KBUILD_DEFCONFIG KBUILD_KCONFIG
5401da177e4SLinus Torvalds
54131110ebbSSam Ravnborgconfig: scripts_basic outputmakefile FORCE
54231110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
54331110ebbSSam Ravnborg
54431110ebbSSam Ravnborg%config: scripts_basic outputmakefile FORCE
5451da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
5461da177e4SLinus Torvalds
5471da177e4SLinus Torvaldselse
5481da177e4SLinus Torvalds# ===========================================================================
5491da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
5501da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
5511da177e4SLinus Torvalds
5521da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
5531da177e4SLinus Torvalds# Additional helpers built in scripts/
5541da177e4SLinus Torvalds# Carefully list dependencies so we do not try to build scripts twice
555070b98bfSSam Ravnborg# in parallel
5564f193362SPaul SmithPHONY += scripts
557a54292f5SAndreas Schwabscripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
5586b90bd4bSEmese Revfy	 asm-generic gcc-plugins
5591da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(@)
5601da177e4SLinus Torvalds
5611da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
5621da177e4SLinus Torvaldsinit-y		:= init/
5634d2acfbfSDavid Woodhousedrivers-y	:= drivers/ sound/ firmware/
5641da177e4SLinus Torvaldsnet-y		:= net/
5651da177e4SLinus Torvaldslibs-y		:= lib/
5661da177e4SLinus Torvaldscore-y		:= usr/
56737d9fe47SFeng Wuvirt-y		:= virt/
5681da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
5691da177e4SLinus Torvalds
5701da177e4SLinus Torvaldsifeq ($(dot-config),1)
5719ee4e336SSam Ravnborg# Read in config
5729ee4e336SSam Ravnborg-include include/config/auto.conf
5731da177e4SLinus Torvalds
5749ee4e336SSam Ravnborgifeq ($(KBUILD_EXTMOD),)
5751da177e4SLinus Torvalds# Read in dependencies to all Kconfig* files, make sure to run
5761da177e4SLinus Torvalds# oldconfig if changes are detected.
577c955ccafSRoman Zippel-include include/config/auto.conf.cmd
5781da177e4SLinus Torvalds
5791da177e4SLinus Torvalds# To avoid any implicit rule to kick in, define an empty command
58014cdd3c4SRoman Zippel$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
5811da177e4SLinus Torvalds
582c955ccafSRoman Zippel# If .config is newer than include/config/auto.conf, someone tinkered
583752625cfSSam Ravnborg# with it and forgot to run make oldconfig.
584070b98bfSSam Ravnborg# if auto.conf.cmd is missing then we are probably in a cleaned tree so
585752625cfSSam Ravnborg# we execute the config step to be sure to catch updated Kconfig files
586bc081dd6SMichal Marekinclude/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
5871da177e4SLinus Torvalds	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
5881da177e4SLinus Torvaldselse
589264a2683SSam Ravnborg# external modules needs include/generated/autoconf.h and include/config/auto.conf
5909ee4e336SSam Ravnborg# but do not care if they are up-to-date. Use auto.conf to trigger the test
5919ee4e336SSam RavnborgPHONY += include/config/auto.conf
5929ee4e336SSam Ravnborg
5939ee4e336SSam Ravnborginclude/config/auto.conf:
594264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
5955369f550SMichal Marek	echo >&2;							\
5965369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
5975369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
5985369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
5995369f550SMichal Marek	echo >&2 ;							\
6009ee4e336SSam Ravnborg	/bin/false)
6019ee4e336SSam Ravnborg
6029ee4e336SSam Ravnborgendif # KBUILD_EXTMOD
603c955ccafSRoman Zippel
6041da177e4SLinus Torvaldselse
6051da177e4SLinus Torvalds# Dummy target needed, because used as prerequisite
606c955ccafSRoman Zippelinclude/config/auto.conf: ;
6079ee4e336SSam Ravnborgendif # $(dot-config)
6081da177e4SLinus Torvalds
6091da177e4SLinus Torvalds# The all: target is the default when no target is given on the
6101da177e4SLinus Torvalds# command line.
6111da177e4SLinus Torvalds# This allow a user to issue only 'make' to build a kernel including modules
612c8447161SMichal Marek# Defaults to vmlinux, but the arch makefile usually adds further targets
6131da177e4SLinus Torvaldsall: vmlinux
6141da177e4SLinus Torvalds
6156dd3f13eSMichal Marek# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
6166dd3f13eSMichal Marek# values of the respective KBUILD_* variables
6176dd3f13eSMichal MarekARCH_CPPFLAGS :=
6186dd3f13eSMichal MarekARCH_AFLAGS :=
6196dd3f13eSMichal MarekARCH_CFLAGS :=
620a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
621a1c48bb1SGeert Uytterhoeven
622a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
623ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
624a1c48bb1SGeert Uytterhoeven
625b67067f1SNicholas Pigginifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
626b67067f1SNicholas PigginKBUILD_CFLAGS	+= $(call cc-option,-ffunction-sections,)
627b67067f1SNicholas PigginKBUILD_CFLAGS	+= $(call cc-option,-fdata-sections,)
628b67067f1SNicholas Pigginendif
629b67067f1SNicholas Piggin
6301da177e4SLinus Torvaldsifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
631*a76bcf55SArnd BergmannKBUILD_CFLAGS	+= -Os $(call cc-disable-warning,maybe-uninitialized,)
6321da177e4SLinus Torvaldselse
633815eb71eSArnd Bergmannifdef CONFIG_PROFILE_ALL_BRANCHES
634*a76bcf55SArnd BergmannKBUILD_CFLAGS	+= -O2 $(call cc-disable-warning,maybe-uninitialized,)
635815eb71eSArnd Bergmannelse
636a0f97e06SSam RavnborgKBUILD_CFLAGS   += -O2
6371da177e4SLinus Torvaldsendif
638815eb71eSArnd Bergmannendif
6391da177e4SLinus Torvalds
640*a76bcf55SArnd BergmannKBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
641*a76bcf55SArnd Bergmann			$(call cc-disable-warning,maybe-uninitialized,))
642*a76bcf55SArnd Bergmann
64369102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
64469102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
64569102311SJiri Kosina
6466b90bd4bSEmese Revfyinclude scripts/Makefile.gcc-plugins
6476b90bd4bSEmese Revfy
6481873e870SAndi Kleenifdef CONFIG_READABLE_ASM
6491873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
6501873e870SAndi Kleen# reorder blocks reorders the control in the function
6511873e870SAndi Kleen# ipa clone creates specialized cloned functions
6521873e870SAndi Kleen# partial inlining inlines only parts of functions
6531873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
6541873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
6551873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
6561873e870SAndi Kleenendif
6571873e870SAndi Kleen
65808f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
65935bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
66035bb5b1eSAndi Kleenendif
66135bb5b1eSAndi Kleen
662c965b105SKees Cook# This selects the stack protector compiler flag. Testing it is delayed
663c965b105SKees Cook# until after .config has been reprocessed, in the prepare-compiler-check
664c965b105SKees Cook# target.
6658779657dSKees Cookifdef CONFIG_CC_STACKPROTECTOR_REGULAR
66619952a92SKees Cook  stackp-flag := -fstack-protector
667c965b105SKees Cook  stackp-name := REGULAR
6686c15b327SJan Beulichelse
6696c15b327SJan Beulichifdef CONFIG_CC_STACKPROTECTOR_STRONG
6708779657dSKees Cook  stackp-flag := -fstack-protector-strong
671c965b105SKees Cook  stackp-name := STRONG
67219952a92SKees Cookelse
67319952a92SKees Cook  # Force off for distro compilers that enable stack protector by default.
67419952a92SKees Cook  stackp-flag := $(call cc-option, -fno-stack-protector)
67519952a92SKees Cookendif
6766c15b327SJan Beulichendif
677c965b105SKees Cook# Find arch-specific stack protector compiler sanity-checking script.
678c965b105SKees Cookifdef CONFIG_CC_STACKPROTECTOR
679228d96c6SKees Cook  stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
680228d96c6SKees Cook  stackp-check := $(wildcard $(stackp-path))
681c965b105SKees Cookendif
68219952a92SKees CookKBUILD_CFLAGS += $(stackp-flag)
683e06b8b98SSam Ravnborg
6845631d9c4SMichal Marekifeq ($(cc-name),clang)
68561163efaSBehan WebsterKBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
68661163efaSBehan WebsterKBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
68761163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
68861163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
68961163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, gnu)
69061163efaSBehan Webster# Quiet clang warning: comparison of unsigned expression < 0 is always false
69161163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
69261163efaSBehan Webster# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
69361163efaSBehan Webster# source of a reference will be _MergedGlobals and not on of the whitelisted names.
69461163efaSBehan Webster# See modpost pattern 2
69561163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
69626ea6bb1SBehan WebsterKBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
69761163efaSBehan Websterelse
69861163efaSBehan Webster
699c9c6837dSArnd Bergmann# These warnings generated too much noise in a regular build.
700c9c6837dSArnd Bergmann# Use make W=1 to enable them (see scripts/Makefile.build)
7018417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
702c9c6837dSArnd BergmannKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
70361163efaSBehan Websterendif
704af0e5d56SDave Jones
7051da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
706a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
7071da177e4SLinus Torvaldselse
7087e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
7097e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
7107e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
7117e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
7127e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
7137e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
714a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
7151da177e4SLinus Torvaldsendif
7167e9501fdSRabin Vincentendif
7171da177e4SLinus Torvalds
7182062afb4SLinus TorvaldsKBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
7192062afb4SLinus Torvalds
7201da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
721866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
722866ced95SAndi KleenKBUILD_CFLAGS   += $(call cc-option, -gsplit-dwarf, -g)
723866ced95SAndi Kleenelse
724a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -g
725866ced95SAndi Kleenendif
7262288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
7271da177e4SLinus Torvaldsendif
728bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
729bfaf2dd3SAndi KleenKBUILD_CFLAGS	+= $(call cc-option, -gdwarf-4,)
730bfaf2dd3SAndi Kleenendif
7311da177e4SLinus Torvalds
732d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
733e82c4bb8SAndi KleenKBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly) \
734e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
735d6f4ceb7SAndi Kleenendif
736d6f4ceb7SAndi Kleen
737606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
738c0a80c0cSHeiko Carstensifndef CC_FLAGS_FTRACE
739c0a80c0cSHeiko CarstensCC_FLAGS_FTRACE := -pg
740c0a80c0cSHeiko Carstensendif
741c0a80c0cSHeiko Carstensexport CC_FLAGS_FTRACE
742a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
743a2546faeSSteven RostedtCC_USING_FENTRY	:= $(call cc-option, -mfentry -DCC_USING_FENTRY)
744a2546faeSSteven Rostedtendif
745c0a80c0cSHeiko CarstensKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
746a2546faeSSteven RostedtKBUILD_AFLAGS	+= $(CC_USING_FENTRY)
74772441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
748cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
74972441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
75072441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
75172441cb1SSteven Rostedt	endif
75272441cb1SSteven Rostedtendif
75316444a8aSArnaldo Carvalho de Meloendif
75416444a8aSArnaldo Carvalho de Melo
75591341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
75691341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
75791341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
75891341d4bSSam Ravnborgendif
75991341d4bSSam Ravnborg
760e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
761e8f5bdb0SRik van RielNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
762e8e69931SSam RavnborgCHECKFLAGS     += $(NOSTDINC_FLAGS)
763e8e69931SSam Ravnborg
7641da177e4SLinus Torvalds# warn about C99 declaration after statement
765a0f97e06SSam RavnborgKBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
7661da177e4SLinus Torvalds
767070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
7688417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
7691da177e4SLinus Torvalds
770fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
771a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
772d0115552SLinus Torvalds
7738f7f5c9fSAndi Kleen# conserve stack if available
7748f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
7758f7f5c9fSAndi Kleen
77680970472SSergei Trofimovich# disallow errors like 'EXPORT_GPL(foo);' with missing header
77780970472SSergei TrofimovichKBUILD_CFLAGS   += $(call cc-option,-Werror=implicit-int)
77880970472SSergei Trofimovich
77980970472SSergei Trofimovich# require functions to have arguments in prototypes, not empty 'int foo()'
78080970472SSergei TrofimovichKBUILD_CFLAGS   += $(call cc-option,-Werror=strict-prototypes)
78180970472SSergei Trofimovich
782fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
783fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
784fe7c36c7SJosh Triplett
785ea8daa7bSDaniel Wagner# enforce correct pointer usage
786ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
787ea8daa7bSDaniel Wagner
78840df759eSMichal Marek# use the deterministic mode of AR if available
78940df759eSMichal MarekKBUILD_ARFLAGS := $(call ar-option,D)
79040df759eSMichal Marek
791bf5438fcSJason Baron# check for 'asm goto'
792bf5438fcSJason Baronifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
793bf5438fcSJason Baron	KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
794c0ccf6f9SAnton Blanchard	KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
795bf5438fcSJason Baronendif
796bf5438fcSJason Baron
797a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
798a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
799c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
800a86fe353SMasahiro Yamada
80161754c18SMichal Marek# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
80261754c18SMichal Marek# last assignments
80361754c18SMichal MarekKBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
80461754c18SMichal MarekKBUILD_AFLAGS   += $(ARCH_AFLAGS)   $(KAFLAGS)
80561754c18SMichal MarekKBUILD_CFLAGS   += $(ARCH_CFLAGS)   $(KCFLAGS)
80652bcc330SSam Ravnborg
80718991197SRoland McGrath# Use --build-id when available.
80818991197SRoland McGrathLDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
809f86fd306SSam Ravnborg			      $(call cc-ldoption, -Wl$(comma)--build-id,))
8106588169dSSam RavnborgKBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
81118991197SRoland McGrathLDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
81218991197SRoland McGrath
813b67067f1SNicholas Pigginifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
814b67067f1SNicholas PigginLDFLAGS_vmlinux	+= $(call ld-option, --gc-sections,)
815b67067f1SNicholas Pigginendif
816b67067f1SNicholas Piggin
8175d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
818d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
8195d7d18f5SDavid Howellsendif
8205d7d18f5SDavid Howells
8211da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
8221da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
8231da177e4SLinus Torvalds# set in the environment
8241da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
8251da177e4SLinus Torvalds# this default value
8261da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
8271da177e4SLinus Torvalds
8281da177e4SLinus Torvalds#
8291da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
8301da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
8311da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
8321da177e4SLinus Torvalds
8331da177e4SLinus Torvalds#
834f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
835f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
836f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
837f4d4ffc0SJason Cooper#
838f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
839f4d4ffc0SJason Cooper
840f4d4ffc0SJason Cooper#
8411da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
8421da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
843070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
8441da177e4SLinus Torvalds#
8451da177e4SLinus Torvalds
846df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
8471da177e4SLinus Torvaldsexport MODLIB
8481da177e4SLinus Torvalds
849ac031f26STheodore Ts'o#
8502ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
8512ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
8522ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
853177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
8542ea03891SSam Ravnborg
855ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
856ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
8572ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
858ac031f26STheodore Ts'oelse
8592ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
860ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
861ac031f26STheodore Ts'oelse
8622ea03891SSam Ravnborgmod_strip_cmd = true
863ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
864ac031f26STheodore Ts'oexport mod_strip_cmd
865ac031f26STheodore Ts'o
866beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
867beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
868beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
869beb50df3SBertrand Jacquin
870beb50df3SBertrand Jacquinmod_compress_cmd = true
871beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
872beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
8733d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
874beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
875beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
8763d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
877beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
878beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
879beb50df3SBertrand Jacquinexport mod_compress_cmd
880beb50df3SBertrand Jacquin
8811bf49dd4SP J P# Select initial ramdisk compression format, default is gzip(1).
8821bf49dd4SP J P# This shall be used by the dracut(8) tool while creating an initramfs image.
8831bf49dd4SP J P#
8847ac18156SJan BeulichINITRD_COMPRESS-y                  := gzip
8857ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
8867ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZMA)  := lzma
8877ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_XZ)    := xz
8887ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZO)   := lzo
8897ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZ4)   := lz4
890b7000adeSLinus Torvalds# do not export INITRD_COMPRESS, since we didn't actually
891b7000adeSLinus Torvalds# choose a sane default compression above.
892b7000adeSLinus Torvalds# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
8931da177e4SLinus Torvalds
894d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
8953ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
8963ee550f1SDavid Woodhouse
8973ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
898e2a666d5SRusty Russellelse
899e2a666d5SRusty Russellmod_sign_cmd = true
900e2a666d5SRusty Russellendif
901e2a666d5SRusty Russellexport mod_sign_cmd
902e2a666d5SRusty Russell
903e2a666d5SRusty Russell
9041da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
905cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
9061da177e4SLinus Torvalds
9071da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
9081da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
90937d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
9101da177e4SLinus Torvalds
9111da177e4SLinus Torvaldsvmlinux-alldirs	:= $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
91237d9fe47SFeng Wu		     $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
9131da177e4SLinus Torvalds
9141da177e4SLinus Torvaldsinit-y		:= $(patsubst %/, %/built-in.o, $(init-y))
9151da177e4SLinus Torvaldscore-y		:= $(patsubst %/, %/built-in.o, $(core-y))
9161da177e4SLinus Torvaldsdrivers-y	:= $(patsubst %/, %/built-in.o, $(drivers-y))
9171da177e4SLinus Torvaldsnet-y		:= $(patsubst %/, %/built-in.o, $(net-y))
9181da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
9191da177e4SLinus Torvaldslibs-y2		:= $(patsubst %/, %/built-in.o, $(libs-y))
9201da177e4SLinus Torvaldslibs-y		:= $(libs-y1) $(libs-y2)
92137d9fe47SFeng Wuvirt-y		:= $(patsubst %/, %/built-in.o, $(virt-y))
9221da177e4SLinus Torvalds
9231f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
92495698570SSam Ravnborgexport KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
92537d9fe47SFeng Wuexport KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
92695698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
9271f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
9286615d6c3SMichal Marek# used by scripts/pacmage/Makefile
92937d9fe47SFeng Wuexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
9301da177e4SLinus Torvalds
9311f2bfbd0SSam Ravnborgvmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
9321da177e4SLinus Torvalds
9332441e78bSNicolas Pitre# Include targets which we want to execute sequentially if the rest of the
9342441e78bSNicolas Pitre# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
9352441e78bSNicolas Pitre# evaluated more than once.
9362441e78bSNicolas PitrePHONY += vmlinux_prereq
9372441e78bSNicolas Pitrevmlinux_prereq: $(vmlinux-deps) FORCE
9380f836e5fSDavid Woodhouseifdef CONFIG_HEADERS_CHECK
9390e7af8d0SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
9400f836e5fSDavid Woodhouseendif
9413ee7b3faSJan Kiszkaifdef CONFIG_GDB_SCRIPTS
9423ee7b3faSJan Kiszka	$(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
9433ee7b3faSJan Kiszkaendif
9442441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
945ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
9462441e78bSNicolas Pitre	  "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile vmlinux_prereq"
9472441e78bSNicolas Pitreendif
94823121ca2SNicolas Pitre
94923121ca2SNicolas Pitre# standalone target for easier testing
95023121ca2SNicolas Pitreinclude/generated/autoksyms.h: FORCE
951ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
95223121ca2SNicolas Pitre
953fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
954fbe6e37dSNicholas Piggin
955fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
956fbe6e37dSNicholas Piggin    cmd_link-vmlinux =                                                 \
957fbe6e37dSNicholas Piggin	$(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ;       \
958fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
9592441e78bSNicolas Pitre
960edf69470SNicolas Pitrevmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
9611f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
962741f98feSSam Ravnborg
963dd92478aSNicolas Pitre# Build samples along the rest of the kernel
964dd92478aSNicolas Pitreifdef CONFIG_SAMPLES
965dd92478aSNicolas Pitrevmlinux-dirs += samples
966dd92478aSNicolas Pitreendif
967dd92478aSNicolas Pitre
9681da177e4SLinus Torvalds# The actual objects are generated when descending,
9691da177e4SLinus Torvalds# make sure no implicit rule kicks in
9701f2bfbd0SSam Ravnborg$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
9711da177e4SLinus Torvalds
9721da177e4SLinus Torvalds# Handle descending into subdirectories listed in $(vmlinux-dirs)
9731da177e4SLinus Torvalds# Preset locale variables to speed up the build process. Limit locale
9741da177e4SLinus Torvalds# tweaks to this spot to avoid wrong language settings when running
9751da177e4SLinus Torvalds# make menuconfig etc.
9761da177e4SLinus Torvalds# Error messages still appears in the original language
9771da177e4SLinus Torvalds
9784f193362SPaul SmithPHONY += $(vmlinux-dirs)
9795bb78269SSam Ravnborg$(vmlinux-dirs): prepare scripts
9801da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$@
9811da177e4SLinus Torvalds
9820d0e7718SMichal Marekdefine filechk_kernel.release
9830d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
9840d0e7718SMichal Marekendef
9850d0e7718SMichal Marek
98683a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
987f1d28fb0SRoman Zippelinclude/config/kernel.release: include/config/auto.conf FORCE
9880d0e7718SMichal Marek	$(call filechk,kernel.release)
989cb58455cSSam Ravnborg
990cb58455cSSam Ravnborg
9911da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
9925bb78269SSam Ravnborg# or the modules are listed in "prepare".
9935bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
9945bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
9955bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
9961da177e4SLinus Torvalds
9975bb78269SSam Ravnborg# Listed in dependency order
9984f193362SPaul SmithPHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
9995bb78269SSam Ravnborg
100086feeaa8SSam Ravnborg# prepare3 is used to check if we are building in a separate output directory,
10011da177e4SLinus Torvalds# and if so do:
10021da177e4SLinus Torvalds# 1) Check that make has not been executed in the kernel src $(srctree)
1003f1d28fb0SRoman Zippelprepare3: include/config/kernel.release
10041da177e4SLinus Torvaldsifneq ($(KBUILD_SRC),)
1005fd54f502SMike Frysinger	@$(kecho) '  Using $(srctree) as source for kernel'
1006c955ccafSRoman Zippel	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
10075369f550SMichal Marek		echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
10085369f550SMichal Marek		echo >&2 "  in the '$(srctree)' directory.";\
10091da177e4SLinus Torvalds		/bin/false; \
10101da177e4SLinus Torvalds	fi;
10111da177e4SLinus Torvaldsendif
10121da177e4SLinus Torvalds
1013c965b105SKees Cook# prepare2 creates a makefile if using a separate output directory.
1014c965b105SKees Cook# From this point forward, .config has been reprocessed, so any rules
1015c965b105SKees Cook# that need to depend on updated CONFIG_* values can be checked here.
1016c965b105SKees Cookprepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
10171da177e4SLinus Torvalds
1018d183e6f5SDavid Howellsprepare1: prepare2 $(version_h) include/generated/utsrelease.h \
1019f7f16b77SSam Ravnborg                   include/config/auto.conf
10207bb9d092SSam Ravnborg	$(cmd_crmodverdir)
1021f2355416SNicolas Pitre	$(Q)test -e include/generated/autoksyms.h || \
1022f2355416SNicolas Pitre	    touch   include/generated/autoksyms.h
10231da177e4SLinus Torvalds
10246520fe55SH. Peter Anvinarchprepare: archheaders archscripts prepare1 scripts_basic
10255bb78269SSam Ravnborg
10266b90bd4bSEmese Revfyprepare0: archprepare gcc-plugins
10278d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
102886feeaa8SSam Ravnborg
10291da177e4SLinus Torvalds# All the preparing..
1030b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1031b9ab5ebbSJosh Poimboeuf
10323b27a0c8SJosh Poimboeufifdef CONFIG_STACK_VALIDATION
1033c2bb9e32SSteven Rostedt  has_libelf := $(call try-run,\
1034c2bb9e32SSteven Rostedt		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
10353b27a0c8SJosh Poimboeuf  ifeq ($(has_libelf),1)
10363b27a0c8SJosh Poimboeuf    objtool_target := tools/objtool FORCE
10373b27a0c8SJosh Poimboeuf  else
1038b573d802SJean Delvare    $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
10393b27a0c8SJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
10403b27a0c8SJosh Poimboeuf    export SKIP_STACK_VALIDATION
10413b27a0c8SJosh Poimboeuf  endif
10423b27a0c8SJosh Poimboeufendif
10433b27a0c8SJosh Poimboeuf
1044b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
10453b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
10461da177e4SLinus Torvalds
1047c965b105SKees Cook# Check for CONFIG flags that require compiler support. Abort the build
1048c965b105SKees Cook# after .config has been processed, but before the kernel build starts.
1049c965b105SKees Cook#
1050c965b105SKees Cook# For security-sensitive CONFIG options, we don't want to fallback and/or
1051c965b105SKees Cook# silently change which compiler flags will be used, since that leads to
1052c965b105SKees Cook# producing kernels with different security feature characteristics
1053c965b105SKees Cook# depending on the compiler used. (For example, "But I selected
1054c965b105SKees Cook# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
1055c965b105SKees CookPHONY += prepare-compiler-check
1056c965b105SKees Cookprepare-compiler-check: FORCE
1057c965b105SKees Cook# Make sure compiler supports requested stack protector flag.
1058c965b105SKees Cookifdef stackp-name
1059c965b105SKees Cook  ifeq ($(call cc-option, $(stackp-flag)),)
1060c965b105SKees Cook	@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1061c965b105SKees Cook		  $(stackp-flag) not supported by compiler >&2 && exit 1
1062c965b105SKees Cook  endif
1063c965b105SKees Cookendif
1064c965b105SKees Cook# Make sure compiler does not have buggy stack-protector support.
1065c965b105SKees Cookifdef stackp-check
1066c965b105SKees Cook  ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
1067c965b105SKees Cook	@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1068c965b105SKees Cook                  $(stackp-flag) available but compiler is broken >&2 && exit 1
1069c965b105SKees Cook  endif
1070c965b105SKees Cookendif
1071c965b105SKees Cook	@:
1072c965b105SKees Cook
10731da177e4SLinus Torvalds# Generate some files
10741da177e4SLinus Torvalds# ---------------------------------------------------------------------------
10751da177e4SLinus Torvalds
10761da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
10771da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
10781da177e4SLinus Torvalds
10791da177e4SLinus Torvaldsuts_len := 64
108063104eecSSam Ravnborgdefine filechk_utsrelease.h
10811da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
10821da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
10831da177e4SLinus Torvalds	  exit 1;                                                         \
10841da177e4SLinus Torvalds	fi;                                                               \
108563104eecSSam Ravnborg	(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
10861da177e4SLinus Torvaldsendef
10871da177e4SLinus Torvalds
108863104eecSSam Ravnborgdefine filechk_version.h
108963104eecSSam Ravnborg	(echo \#define LINUX_VERSION_CODE $(shell                         \
109078d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
109163104eecSSam Ravnborg	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
109263104eecSSam Ravnborgendef
109363104eecSSam Ravnborg
1094d183e6f5SDavid Howells$(version_h): $(srctree)/Makefile FORCE
10951da177e4SLinus Torvalds	$(call filechk,version.h)
1096223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
10971da177e4SLinus Torvalds
1098273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
109963104eecSSam Ravnborg	$(call filechk,utsrelease.h)
110063104eecSSam Ravnborg
1101179efcb4SVegard NossumPHONY += headerdep
1102179efcb4SVegard Nossumheaderdep:
11039663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
11049663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1105179efcb4SVegard Nossum
11061da177e4SLinus Torvalds# ---------------------------------------------------------------------------
110788ecf814SDavid Woodhouse# Firmware install
110888ecf814SDavid WoodhouseINSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
110988ecf814SDavid Woodhouseexport INSTALL_FW_PATH
111088ecf814SDavid Woodhouse
111188ecf814SDavid WoodhousePHONY += firmware_install
11122e8d696bSMasahiro Yamadafirmware_install:
111388ecf814SDavid Woodhouse	@mkdir -p $(objtree)/firmware
111488ecf814SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
111588ecf814SDavid Woodhouse
111688ecf814SDavid Woodhouse# ---------------------------------------------------------------------------
11178d730cfbSDavid Woodhouse# Kernel headers
11188d730cfbSDavid Woodhouse
1119e6883b18SSam Ravnborg#Default location for installed headers
1120e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1121e6883b18SSam Ravnborg
11222fb9b1bdSSam Ravnborg# If we do an all arch process set dst to asm-$(hdr-arch)
11232fb9b1bdSSam Ravnborghdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1124e6883b18SSam Ravnborg
1125052ad274SH. Peter AnvinPHONY += archheaders
1126052ad274SH. Peter Anvinarchheaders:
1127052ad274SH. Peter Anvin
11286520fe55SH. Peter AnvinPHONY += archscripts
11296520fe55SH. Peter Anvinarchscripts:
11306520fe55SH. Peter Anvin
1131e6883b18SSam RavnborgPHONY += __headers
11322e8d696bSMasahiro Yamada__headers: $(version_h) scripts_basic asm-generic archheaders archscripts
1133e1b702cfSMike Waychison	$(Q)$(MAKE) $(build)=scripts build_unifdef
11346d716275SDavid Woodhouse
11356d716275SDavid WoodhousePHONY += headers_install_all
11362fb9b1bdSSam Ravnborgheaders_install_all:
11372fb9b1bdSSam Ravnborg	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
11386d716275SDavid Woodhouse
11398d730cfbSDavid WoodhousePHONY += headers_install
1140e6883b18SSam Ravnborgheaders_install: __headers
114110b63956SDavid Howells	$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
11422fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
114310b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=include/uapi
114410b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
11458d730cfbSDavid Woodhouse
11461f85712eSMike FrysingerPHONY += headers_check_all
11471f85712eSMike Frysingerheaders_check_all: headers_install_all
11482fb9b1bdSSam Ravnborg	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
11491f85712eSMike Frysinger
115068475359SDavid WoodhousePHONY += headers_check
115168475359SDavid Woodhouseheaders_check: headers_install
115210b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
115310b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
115468475359SDavid Woodhouse
11558d730cfbSDavid Woodhouse# ---------------------------------------------------------------------------
11565a5da78bSShuah Khan# Kernel selftest
11575a5da78bSShuah Khan
11585a5da78bSShuah KhanPHONY += kselftest
11595a5da78bSShuah Khankselftest:
11605a5da78bSShuah Khan	$(Q)$(MAKE) -C tools/testing/selftests run_tests
11615a5da78bSShuah Khan
1162dcb825a9SWang Longkselftest-clean:
1163dcb825a9SWang Long	$(Q)$(MAKE) -C tools/testing/selftests clean
1164dcb825a9SWang Long
11653d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
11663d6dee7aSBamvor Jian Zhangkselftest-merge:
11673d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
11683d6dee7aSBamvor Jian Zhang	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
11693d6dee7aSBamvor Jian Zhang		-m $(objtree)/.config \
11703d6dee7aSBamvor Jian Zhang		$(srctree)/tools/testing/selftests/*/config
11713d6dee7aSBamvor Jian Zhang	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
11723d6dee7aSBamvor Jian Zhang
11735a5da78bSShuah Khan# ---------------------------------------------------------------------------
11741da177e4SLinus Torvalds# Modules
11751da177e4SLinus Torvalds
11761da177e4SLinus Torvaldsifdef CONFIG_MODULES
11771da177e4SLinus Torvalds
11781da177e4SLinus Torvalds# By default, build modules as well
11791da177e4SLinus Torvalds
118073d1393eSMichal Marekall: modules
11811da177e4SLinus Torvalds
11821da177e4SLinus Torvalds# Build modules
1183551559e1STejun Heo#
1184551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1185551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1186551559e1STejun Heo# using awk while concatenating to the final file.
11871da177e4SLinus Torvalds
11884f193362SPaul SmithPHONY += modules
11892da30e70SMichal Marekmodules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1190551559e1STejun Heo	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1191fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1192b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
119344463f7dSDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
11941da177e4SLinus Torvalds
1195a6c36632SMichal Marekmodules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1196a6c36632SMichal Marek	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1197a6c36632SMichal Marek
119873d1393eSMichal Marek%/modules.builtin: include/config/auto.conf
1199a6c36632SMichal Marek	$(Q)$(MAKE) $(modbuiltin)=$*
1200a6c36632SMichal Marek
12011da177e4SLinus Torvalds
12021da177e4SLinus Torvalds# Target to prepare building external modules
12034f193362SPaul SmithPHONY += modules_prepare
12045bb78269SSam Ravnborgmodules_prepare: prepare scripts
12051da177e4SLinus Torvalds
12061da177e4SLinus Torvalds# Target to install modules
12074f193362SPaul SmithPHONY += modules_install
12081da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
12091da177e4SLinus Torvalds
12104f193362SPaul SmithPHONY += _modinst_
12112da30e70SMichal Marek_modinst_:
12121da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
12131da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
12141da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
1215890676c6SMichal Marek	@ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
12161da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
12171da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
12187e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
12191da177e4SLinus Torvalds	fi
1220551559e1STejun Heo	@cp -f $(objtree)/modules.order $(MODLIB)/
1221bc081dd6SMichal Marek	@cp -f $(objtree)/modules.builtin $(MODLIB)/
1222b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
12231da177e4SLinus Torvalds
122450a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
12251da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
12261da177e4SLinus Torvalds# boot script depmod is the master version.
12274f193362SPaul SmithPHONY += _modinst_post
12286d128e1eSLinus Torvalds_modinst_post: _modinst_
122988ecf814SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
123050a8ec31SSam Ravnborg	$(call cmd,depmod)
12311da177e4SLinus Torvalds
1232d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1233d890f510SJosh BoyerPHONY += modules_sign
1234d890f510SJosh Boyermodules_sign:
1235d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1236d890f510SJosh Boyerendif
1237d890f510SJosh Boyer
12381da177e4SLinus Torvaldselse # CONFIG_MODULES
12391da177e4SLinus Torvalds
12401da177e4SLinus Torvalds# Modules not configured
12411da177e4SLinus Torvalds# ---------------------------------------------------------------------------
12421da177e4SLinus Torvalds
1243612e47ceSMasahiro YamadaPHONY += modules modules_install
1244612e47ceSMasahiro Yamadamodules modules_install:
12455369f550SMichal Marek	@echo >&2
12465369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
12475369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
12485369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
12495369f550SMichal Marek	@echo >&2
12501da177e4SLinus Torvalds	@exit 1
12511da177e4SLinus Torvalds
12521da177e4SLinus Torvaldsendif # CONFIG_MODULES
12531da177e4SLinus Torvalds
12541da177e4SLinus Torvalds###
12551da177e4SLinus Torvalds# Cleaning is done on three levels.
12561da177e4SLinus Torvalds# make clean     Delete most generated files
12571da177e4SLinus Torvalds#                Leave enough to build external modules
12581da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
12591da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
12601da177e4SLinus Torvalds
12611da177e4SLinus Torvalds# Directories & files removed with 'make clean'
12621da177e4SLinus TorvaldsCLEAN_DIRS  += $(MODVERDIR)
12631da177e4SLinus Torvalds
12641da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1265d8ecc5cdSSam RavnborgMRPROPER_DIRS  += include/config usr/include include/generated          \
126679192ca8SJason Cooper		  arch/*/include/generated .tmp_objdiff
1267c22bd32cSMasahiro YamadaMRPROPER_FILES += .config .config.old .version .old_version \
1268d5b71936SRusty Russell		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1269fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1270fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
12713ee7b3faSJan Kiszka		  signing_key.x509.signer vmlinux-gdb.py
12721da177e4SLinus Torvalds
12731da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
12741da177e4SLinus Torvalds#
12751da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
12761da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
1277fb68d4beSGerard Snitselaarclean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
12781da177e4SLinus Torvalds
1279bd1ee804SPawel MollPHONY += $(clean-dirs) clean archclean vmlinuxclean
12801da177e4SLinus Torvalds$(clean-dirs):
12811da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
12821da177e4SLinus Torvalds
1283bd1ee804SPawel Mollvmlinuxclean:
1284bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1285fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1286bd1ee804SPawel Moll
1287bd1ee804SPawel Mollclean: archclean vmlinuxclean
12881da177e4SLinus Torvalds
12891da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
12901da177e4SLinus Torvalds#
12911da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
12921da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
12931da177e4SLinus Torvaldsmrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
12941da177e4SLinus Torvalds
12954f193362SPaul SmithPHONY += $(mrproper-dirs) mrproper archmrproper
12961da177e4SLinus Torvalds$(mrproper-dirs):
12971da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
12981da177e4SLinus Torvalds
12991da177e4SLinus Torvaldsmrproper: clean archmrproper $(mrproper-dirs)
13001da177e4SLinus Torvalds	$(call cmd,rmdirs)
13011da177e4SLinus Torvalds	$(call cmd,rmfiles)
13021da177e4SLinus Torvalds
13031da177e4SLinus Torvalds# distclean
13041da177e4SLinus Torvalds#
13054f193362SPaul SmithPHONY += distclean
13061da177e4SLinus Torvalds
13071da177e4SLinus Torvaldsdistclean: mrproper
13081da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
13091da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
13101da177e4SLinus Torvalds		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1311a03fcb50SMasahiro Yamada		-o -name '.*.rej' -o -name '*%'  -o -name 'core' \) \
13121da177e4SLinus Torvalds		-type f -print | xargs rm -f
13131da177e4SLinus Torvalds
13141da177e4SLinus Torvalds
13151da177e4SLinus Torvalds# Packaging of the kernel to various formats
13161da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13171da177e4SLinus Torvalds# rpm target kept for backward compatibility
1318c79624c1SMichal Marekpackage-dir	:= scripts/package
13191da177e4SLinus Torvalds
1320bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1321bafb6747SArnaldo Carvalho de Melo	$(Q)$(MAKE) $(build)=$(package-dir) $@
1322031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
13236c2133e1SSam Ravnborg	$(Q)$(MAKE) $(build)=$(package-dir) $@
1324031ecc6dSZach Brownrpm: include/config/kernel.release FORCE
13256c2133e1SSam Ravnborg	$(Q)$(MAKE) $(build)=$(package-dir) $@
13261da177e4SLinus Torvalds
13271da177e4SLinus Torvalds
13281da177e4SLinus Torvalds# Brief documentation of the typical targets used
13291da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13301da177e4SLinus Torvalds
13315dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1332a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
13335dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
13345dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
13351da177e4SLinus Torvalds
1336fe69b420SMasahiro YamadaPHONY += help
13371da177e4SLinus Torvaldshelp:
13381da177e4SLinus Torvalds	@echo  'Cleaning targets:'
13395ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
13405cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
13415ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
13425cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
13431da177e4SLinus Torvalds	@echo  ''
13441da177e4SLinus Torvalds	@echo  'Configuration targets:'
13451da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
13461da177e4SLinus Torvalds	@echo  ''
13471da177e4SLinus Torvalds	@echo  'Other generic targets:'
13481da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
13491da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
13501da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
13519cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
135288ecf814SDavid Woodhouse	@echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
135388ecf814SDavid Woodhouse	@echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
13541da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
135540ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
135662718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
135762718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1358155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1359c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
13601da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
13611da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1362f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
13633f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
13643f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
13653f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
13662fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
136759df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
13682fb9b1bdSSam Ravnborg	 echo  ''
13691da177e4SLinus Torvalds	@echo  'Static analysers'
13701da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
13711da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1372aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1373ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1374295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1375179efcb4SVegard Nossum	@echo  '  headers_check   - Sanity check on exported headers'
137674425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
137774425eeeSNicolas Palix	@$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
137874425eeeSNicolas Palix	@echo  ''
13795a5da78bSShuah Khan	@echo  'Kernel selftest'
13805a5da78bSShuah Khan	@echo  '  kselftest       - Build and run kernel selftest (run as root)'
13815a5da78bSShuah Khan	@echo  '                    Build, install, and boot kernel before'
13825a5da78bSShuah Khan	@echo  '                    running kselftest on it'
1383dcb825a9SWang Long	@echo  '  kselftest-clean - Remove all generated kselftest files'
13843d6dee7aSBamvor Jian Zhang	@echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existed'
13853d6dee7aSBamvor Jian Zhang	@echo  '                    .config.'
13865a5da78bSShuah Khan	@echo  ''
13871da177e4SLinus Torvalds	@echo  'Kernel packaging:'
13886c2133e1SSam Ravnborg	@$(MAKE) $(build)=$(package-dir) help
13891da177e4SLinus Torvalds	@echo  ''
13901da177e4SLinus Torvalds	@echo  'Documentation targets:'
1391ebc88ef0SJani Nikula	@$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp
1392ebc88ef0SJani Nikula	@echo  ''
13931da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
13941da177e4SLinus Torvalds	@echo  ''
139501dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
13961da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
139701dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
13981da177e4SLinus Torvalds	@echo  ''
13991da177e4SLinus Torvalds	@$(if $(boards), \
14001da177e4SLinus Torvalds		$(foreach b, $(boards), \
14011da177e4SLinus Torvalds		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
14021da177e4SLinus Torvalds		echo '')
14035dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
14045dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
14055dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
14065dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
14075dffbe81SSegher Boessenkool		echo '')
14081da177e4SLinus Torvalds
14091da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
141045d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
14111da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1412701842e3SDustin Kirkland	@echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1413701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1414af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
141528bc20dcSSam Ravnborg	@echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
141628bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
141728bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
141828bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1419a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
14201da177e4SLinus Torvalds	@echo  ''
14211da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
14221da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
14231da177e4SLinus Torvalds
14241da177e4SLinus Torvalds
14255dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
14265dffbe81SSegher Boessenkool
14275dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
14285dffbe81SSegher Boessenkool
1429fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
14305dffbe81SSegher Boessenkool
14315dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
14325dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
14335dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
14345dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
14355dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
14365dffbe81SSegher Boessenkool		echo '')
14375dffbe81SSegher Boessenkool
14385dffbe81SSegher Boessenkool
14391da177e4SLinus Torvalds# Documentation targets
14401da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1441d565127dSMauro Carvalho ChehabDOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs
144222cba31bSJani NikulaPHONY += $(DOC_TARGETS)
144322cba31bSJani Nikula$(DOC_TARGETS): scripts_basic FORCE
1444b479bfd0SBen Hutchings	$(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
144522cba31bSJani Nikula	$(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@
14461da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=Documentation/DocBook $@
14471da177e4SLinus Torvalds
14481da177e4SLinus Torvaldselse # KBUILD_EXTMOD
14491da177e4SLinus Torvalds
14501da177e4SLinus Torvalds###
14511da177e4SLinus Torvalds# External module support.
14521da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
14531da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
14541da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
14551da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
14561da177e4SLinus Torvalds# be used.
14571da177e4SLinus Torvalds#
14581da177e4SLinus Torvalds# The following are the only valid targets when building external
14591da177e4SLinus Torvalds# modules.
14601da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
14611da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
14621da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
14631da177e4SLinus Torvalds# make M=dir modules_install
1464070b98bfSSam Ravnborg#                      Install the modules built in the module directory
14651da177e4SLinus Torvalds#                      Assumes install directory is already created
14661da177e4SLinus Torvalds
14671da177e4SLinus Torvalds# We are always building modules
14681da177e4SLinus TorvaldsKBUILD_MODULES := 1
14694f193362SPaul SmithPHONY += crmodverdir
14701da177e4SLinus Torvaldscrmodverdir:
14717bb9d092SSam Ravnborg	$(cmd_crmodverdir)
14721da177e4SLinus Torvalds
14734f193362SPaul SmithPHONY += $(objtree)/Module.symvers
14741da177e4SLinus Torvalds$(objtree)/Module.symvers:
14751da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
14761da177e4SLinus Torvalds	echo; \
14771da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
14781da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
14791da177e4SLinus Torvalds	echo )
14801da177e4SLinus Torvalds
14811da177e4SLinus Torvaldsmodule-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
14824f193362SPaul SmithPHONY += $(module-dirs) modules
14831da177e4SLinus Torvalds$(module-dirs): crmodverdir $(objtree)/Module.symvers
14841da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
14851da177e4SLinus Torvalds
14861da177e4SLinus Torvaldsmodules: $(module-dirs)
1487fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1488b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
14891da177e4SLinus Torvalds
14904f193362SPaul SmithPHONY += modules_install
1491a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1492a67dc21aSSam Ravnborg
1493a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
14944f193362SPaul SmithPHONY += _emodinst_
1495a67dc21aSSam Ravnborg_emodinst_:
1496a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1497b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
14981da177e4SLinus Torvalds
14994f193362SPaul SmithPHONY += _emodinst_post
1500a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1501a67dc21aSSam Ravnborg	$(call cmd,depmod)
1502a67dc21aSSam Ravnborg
15031da177e4SLinus Torvaldsclean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
15041da177e4SLinus Torvalds
15054f193362SPaul SmithPHONY += $(clean-dirs) clean
15061da177e4SLinus Torvalds$(clean-dirs):
15071da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
15081da177e4SLinus Torvalds
15091da177e4SLinus Torvaldsclean:	rm-dirs := $(MODVERDIR)
151088d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
15111da177e4SLinus Torvalds
1512fe69b420SMasahiro YamadaPHONY += help
15131da177e4SLinus Torvaldshelp:
15141da177e4SLinus Torvalds	@echo  '  Building external modules.'
15151da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
15161da177e4SLinus Torvalds	@echo  ''
15171da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
15181da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
15191da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
15201da177e4SLinus Torvalds	@echo  ''
152106300b21SSam Ravnborg
152206300b21SSam Ravnborg# Dummies...
15234f193362SPaul SmithPHONY += prepare scripts
152406300b21SSam Ravnborgprepare: ;
152506300b21SSam Ravnborgscripts: ;
15261da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
15271da177e4SLinus Torvalds
152888d7be03SMichal Marekclean: $(clean-dirs)
152988d7be03SMichal Marek	$(call cmd,rmdirs)
153088d7be03SMichal Marek	$(call cmd,rmfiles)
153143f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
153288d7be03SMichal Marek		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1533addbcdbbSDavid Howells		-o -name '*.ko.*' \
1534866ced95SAndi Kleen		-o -name '*.dwo'  \
1535d523b255SRasmus Villemoes		-o -name '*.su'  \
153688d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
153788d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
153888d7be03SMichal Marek		-o -name modules.builtin -o -name '.tmp_*.o.*' \
15396b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
154088d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
154188d7be03SMichal Marek
15421da177e4SLinus Torvalds# Generate tags for editors
15431da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1544a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1545a680eedcSSam Ravnborg      cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
15461da177e4SLinus Torvalds
1547f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
15481da177e4SLinus Torvalds	$(call cmd,tags)
15491da177e4SLinus Torvalds
15501da177e4SLinus Torvalds# Scripts to check various things for consistency
15511da177e4SLinus Torvalds# ---------------------------------------------------------------------------
15521da177e4SLinus Torvalds
1553279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1554279f3dd3SPeter Foley
15551da177e4SLinus Torvaldsincludecheck:
1556436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
15571da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
155880007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
15591da177e4SLinus Torvalds
15601da177e4SLinus Torvaldsversioncheck:
15612ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
15621da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
156380007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
15641da177e4SLinus Torvalds
156574425eeeSNicolas Palixcoccicheck:
156674425eeeSNicolas Palix	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
156774425eeeSNicolas Palix
15681da177e4SLinus Torvaldsnamespacecheck:
15691da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
15701da177e4SLinus Torvalds
1571295ac051SAdrian Bunkexport_report:
1572295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1573295ac051SAdrian Bunk
15741da177e4SLinus Torvaldsendif #ifeq ($(config-targets),1)
15751da177e4SLinus Torvaldsendif #ifeq ($(mixed-targets),1)
15761da177e4SLinus Torvalds
1577c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1578e3ccf6e3SJeff Dike
1579011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1580011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1581011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1582011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1583011e3a9aSJeff Dikeifeq ($(ARCH), um)
1584011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1585011e3a9aSJeff Dikeelse
1586011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1587011e3a9aSJeff Dikeendif
15881da177e4SLinus Torvaldscheckstack:
15891da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1590011e3a9aSJeff Dike	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
15911da177e4SLinus Torvalds
15927b8ea53dSAmerigo Wangkernelrelease:
15937b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
159401ab1788SAmerigo Wang
1595cb58455cSSam Ravnborgkernelversion:
15962244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
15971da177e4SLinus Torvalds
1598c398ff00SMike Marciniszynimage_name:
1599c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1600c398ff00SMike Marciniszyn
1601ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1602ea01fa9fSBorislav Petkovtools/: FORCE
1603bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1604e17cf3a8SJosh Poimboeuf	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
1605ea01fa9fSBorislav Petkov
1606ea01fa9fSBorislav Petkovtools/%: FORCE
1607bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1608e17cf3a8SJosh Poimboeuf	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
1609ea01fa9fSBorislav Petkov
161006300b21SSam Ravnborg# Single targets
161106300b21SSam Ravnborg# ---------------------------------------------------------------------------
1612bc2546a6SSam Ravnborg# Single targets are compatible with:
1613e1b8513dSRobert P. J. Day# - build with mixed source and output
1614bc2546a6SSam Ravnborg# - build with separate output dir 'make O=...'
1615bc2546a6SSam Ravnborg# - external modules
1616bc2546a6SSam Ravnborg#
1617bc2546a6SSam Ravnborg#  target-dir => where to store outputfile
1618bc2546a6SSam Ravnborg#  build-dir  => directory in kernel source tree to use
161906300b21SSam Ravnborg
162006300b21SSam Ravnborgifeq ($(KBUILD_EXTMOD),)
1621aa360879SSam Ravnborg        build-dir  = $(patsubst %/,%,$(dir $@))
1622bc2546a6SSam Ravnborg        target-dir = $(dir $@)
162306300b21SSam Ravnborgelse
162406300b21SSam Ravnborg        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1625bc2546a6SSam Ravnborg        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1626bc2546a6SSam Ravnborg        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
162706300b21SSam Ravnborgendif
162806300b21SSam Ravnborg
1629bc2546a6SSam Ravnborg%.s: %.c prepare scripts FORCE
1630bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1631bc2546a6SSam Ravnborg%.i: %.c prepare scripts FORCE
1632bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1633bc2546a6SSam Ravnborg%.o: %.c prepare scripts FORCE
1634bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1635bc2546a6SSam Ravnborg%.lst: %.c prepare scripts FORCE
1636bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1637bc2546a6SSam Ravnborg%.s: %.S prepare scripts FORCE
1638bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1639bc2546a6SSam Ravnborg%.o: %.S prepare scripts FORCE
1640bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
164115fde675SAndreas Gruenbacher%.symtypes: %.c prepare scripts FORCE
164215fde675SAndreas Gruenbacher	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1643bc2546a6SSam Ravnborg
1644bc2546a6SSam Ravnborg# Modules
164531110ebbSSam Ravnborg/: prepare scripts FORCE
164631110ebbSSam Ravnborg	$(cmd_crmodverdir)
164731110ebbSSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
164831110ebbSSam Ravnborg	$(build)=$(build-dir)
16498e2faea8SPeter Foley# Make sure the latest headers are built for Documentation
1650ddea05faSArnd BergmannDocumentation/ samples/: headers_install
165131110ebbSSam Ravnborg%/: prepare scripts FORCE
16527bb9d092SSam Ravnborg	$(cmd_crmodverdir)
165306300b21SSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1654bc2546a6SSam Ravnborg	$(build)=$(build-dir)
1655bc2546a6SSam Ravnborg%.ko: prepare scripts FORCE
16567bb9d092SSam Ravnborg	$(cmd_crmodverdir)
165706300b21SSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1658bc2546a6SSam Ravnborg	$(build)=$(build-dir) $(@:.ko=.o)
1659b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
166006300b21SSam Ravnborg
16611da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
16621da177e4SLinus Torvalds# ===========================================================================
16631da177e4SLinus Torvalds
16641da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
16651da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
16661da177e4SLinus Torvalds
16671da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
16681da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
16691da177e4SLinus Torvalds
1670bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
167150a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1672569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1673b92021b0SRusty Russell                   $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
167450a8ec31SSam Ravnborg
16757bb9d092SSam Ravnborg# Create temporary dir for module support files
1676ab19f879SSam Ravnborg# clean it up only when building all modules
1677ab19f879SSam Ravnborgcmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1678ab19f879SSam Ravnborg                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
16791da177e4SLinus Torvalds
16801da177e4SLinus Torvalds# read all saved command lines
16811da177e4SLinus Torvalds
16821da177e4SLinus Torvaldstargets := $(wildcard $(sort $(targets)))
16831da177e4SLinus Torvaldscmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
16841da177e4SLinus Torvalds
16851da177e4SLinus Torvaldsifneq ($(cmd_files),)
16861da177e4SLinus Torvalds  $(cmd_files): ;	# Do not try to update included dependency files
16871da177e4SLinus Torvalds  include $(cmd_files)
16881da177e4SLinus Torvaldsendif
16891da177e4SLinus Torvalds
16901da177e4SLinus Torvaldsendif	# skip-makefile
16911da177e4SLinus Torvalds
16924f193362SPaul SmithPHONY += FORCE
16931da177e4SLinus TorvaldsFORCE:
16944f193362SPaul Smith
16954f193362SPaul Smith# Declare the contents of the .PHONY variable as phony.  We keep that
1696fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
16974f193362SPaul Smith.PHONY: $(PHONY)
1698