xref: /openbmc/linux/Makefile (revision 2f7ab1267dc9b2d1f29695aff3211c87483480f3)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2568035b0SLinus TorvaldsVERSION = 6
3568035b0SLinus TorvaldsPATCHLEVEL = 0
455922c9dSLinus TorvaldsSUBLEVEL = 0
5f76349cfSLinus TorvaldsEXTRAVERSION = -rc7
6568035b0SLinus TorvaldsNAME = Hurr durr I'ma ninja sloth
71da177e4SLinus Torvalds
81da177e4SLinus Torvalds# *DOCUMENTATION*
91da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
101da177e4SLinus Torvalds# More info can be located in ./README
111da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
121da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
131da177e4SLinus Torvalds
14121c2a13SMasahiro Yamada$(if $(filter __%, $(MAKECMDGOALS)), \
15121c2a13SMasahiro Yamada	$(error targets prefixed with '__' are only for internal use))
16121c2a13SMasahiro Yamada
17ba634eceSMasahiro Yamada# That's our default target when none is given on the command line
18121c2a13SMasahiro YamadaPHONY := __all
19121c2a13SMasahiro Yamada__all:
20ba634eceSMasahiro Yamada
211da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
221da177e4SLinus Torvalds# to get the ordering right.
231da177e4SLinus Torvalds#
241da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
251da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
261da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
27f49821eeSNicholas Piggin# unavoidable when linking the built-in.a targets which finally
281da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
291da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
301da177e4SLinus Torvalds# is now up to date.
311da177e4SLinus Torvalds#
321da177e4SLinus Torvalds# The only cases where we need to modify files which have global
331da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
341da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
351da177e4SLinus Torvalds# prepare rule.
361da177e4SLinus Torvalds
37221cc2d2SMasahiro Yamadaifneq ($(sub_make_done),1)
383812b8c5SMasahiro Yamada
393812b8c5SMasahiro Yamada# Do not use make's built-in rules and variables
403812b8c5SMasahiro Yamada# (this increases performance and avoids hard-to-debug behaviour)
413812b8c5SMasahiro YamadaMAKEFLAGS += -rR
423812b8c5SMasahiro Yamada
433812b8c5SMasahiro Yamada# Avoid funny character set dependencies
443812b8c5SMasahiro Yamadaunexport LC_ALL
453812b8c5SMasahiro YamadaLC_COLLATE=C
463812b8c5SMasahiro YamadaLC_NUMERIC=C
473812b8c5SMasahiro Yamadaexport LC_COLLATE LC_NUMERIC
483812b8c5SMasahiro Yamada
493812b8c5SMasahiro Yamada# Avoid interference with shell env settings
503812b8c5SMasahiro Yamadaunexport GREP_OPTIONS
513812b8c5SMasahiro Yamada
52066b7ed9SMichal Marek# Beautify output
53066b7ed9SMichal Marek# ---------------------------------------------------------------------------
54066b7ed9SMichal Marek#
55066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
56066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
57066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
58066b7ed9SMichal Marek#
59066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
60066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
61066b7ed9SMichal Marek#
62066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
63066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
64066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
65066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
66066b7ed9SMichal Marek#
67066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
68066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
69066b7ed9SMichal Marek#
70066b7ed9SMichal Marek#	$(Q)ln $@ :<
71066b7ed9SMichal Marek#
72066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
73066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
74505b12b3SRandy Dunlap# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
75066b7ed9SMichal Marek#
761da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
771da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
781da177e4SLinus Torvalds
791da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
801da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
811da177e4SLinus Torvaldsendif
821da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
831da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
841da177e4SLinus Torvaldsendif
851da177e4SLinus Torvalds
86066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
87066b7ed9SMichal Marek  quiet =
88066b7ed9SMichal Marek  Q =
89066b7ed9SMichal Marekelse
90066b7ed9SMichal Marek  quiet=quiet_
91066b7ed9SMichal Marek  Q = @
92066b7ed9SMichal Marekendif
93066b7ed9SMichal Marek
94066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
95066b7ed9SMichal Marek# commands
96066b7ed9SMichal Marek
976f0fa58eSMasahiro Yamadaifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
98066b7ed9SMichal Marek  quiet=silent_
9922149454SMasahiro Yamada  KBUILD_VERBOSE = 0
100066b7ed9SMichal Marekendif
101066b7ed9SMichal Marek
102066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
103066b7ed9SMichal Marek
104bcf637f5SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
105bcf637f5SMasahiro Yamada# C compilation.
106bcf637f5SMasahiro Yamada#
107bcf637f5SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
108bcf637f5SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
109bcf637f5SMasahiro Yamada# of whether they are re-compiled or not.
110bcf637f5SMasahiro Yamada#
111bcf637f5SMasahiro Yamada# See the file "Documentation/dev-tools/sparse.rst" for more details,
112bcf637f5SMasahiro Yamada# including where to get the "sparse" utility.
113bcf637f5SMasahiro Yamada
114bcf637f5SMasahiro Yamadaifeq ("$(origin C)", "command line")
115bcf637f5SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
116bcf637f5SMasahiro Yamadaendif
117bcf637f5SMasahiro Yamadaifndef KBUILD_CHECKSRC
118bcf637f5SMasahiro Yamada  KBUILD_CHECKSRC = 0
119bcf637f5SMasahiro Yamadaendif
120bcf637f5SMasahiro Yamada
121bcf637f5SMasahiro Yamadaexport KBUILD_CHECKSRC
122bcf637f5SMasahiro Yamada
123*2f7ab126SMiguel Ojeda# Enable "clippy" (a linter) as part of the Rust compilation.
124*2f7ab126SMiguel Ojeda#
125*2f7ab126SMiguel Ojeda# Use 'make CLIPPY=1' to enable it.
126*2f7ab126SMiguel Ojedaifeq ("$(origin CLIPPY)", "command line")
127*2f7ab126SMiguel Ojeda  KBUILD_CLIPPY := $(CLIPPY)
128*2f7ab126SMiguel Ojedaendif
129*2f7ab126SMiguel Ojeda
130*2f7ab126SMiguel Ojedaexport KBUILD_CLIPPY
131*2f7ab126SMiguel Ojeda
132bcf637f5SMasahiro Yamada# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
133bcf637f5SMasahiro Yamada# directory of external module to build. Setting M= takes precedence.
134bcf637f5SMasahiro Yamadaifeq ("$(origin M)", "command line")
135bcf637f5SMasahiro Yamada  KBUILD_EXTMOD := $(M)
136bcf637f5SMasahiro Yamadaendif
137bcf637f5SMasahiro Yamada
138bcf637f5SMasahiro Yamada$(if $(word 2, $(KBUILD_EXTMOD)), \
139bcf637f5SMasahiro Yamada	$(error building multiple external modules is not supported))
140bcf637f5SMasahiro Yamada
1419a68fd7fSMasahiro Yamada$(foreach x, % :, $(if $(findstring $x, $(KBUILD_EXTMOD)), \
1429a68fd7fSMasahiro Yamada	$(error module directory path cannot contain '$x')))
1439a68fd7fSMasahiro Yamada
14474ee585bSMasahiro Yamada# Remove trailing slashes
14574ee585bSMasahiro Yamadaifneq ($(filter %/, $(KBUILD_EXTMOD)),)
14674ee585bSMasahiro YamadaKBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).)
14774ee585bSMasahiro Yamadaendif
14874ee585bSMasahiro Yamada
149bcf637f5SMasahiro Yamadaexport KBUILD_EXTMOD
150bcf637f5SMasahiro Yamada
15125b146c5SMasahiro Yamada# Kbuild will save output files in the current working directory.
15225b146c5SMasahiro Yamada# This does not need to match to the root of the kernel source tree.
15325b146c5SMasahiro Yamada#
15425b146c5SMasahiro Yamada# For example, you can do this:
15525b146c5SMasahiro Yamada#
15625b146c5SMasahiro Yamada#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
15725b146c5SMasahiro Yamada#
15825b146c5SMasahiro Yamada# If you want to save output files in a different location, there are
15925b146c5SMasahiro Yamada# two syntaxes to specify it.
16025b146c5SMasahiro Yamada#
1611da177e4SLinus Torvalds# 1) O=
1621da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
1631da177e4SLinus Torvalds#
1641da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
16525b146c5SMasahiro Yamada# Set the environment variable KBUILD_OUTPUT to point to the output directory.
16625b146c5SMasahiro Yamada# export KBUILD_OUTPUT=dir/to/store/output/files/; make
1671da177e4SLinus Torvalds#
1681da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
1691da177e4SLinus Torvalds# variable.
1701da177e4SLinus Torvalds
17125b146c5SMasahiro Yamada# Do we want to change the working directory?
1721da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
1731da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
1741da177e4SLinus Torvaldsendif
1751da177e4SLinus Torvalds
17625b146c5SMasahiro Yamadaifneq ($(KBUILD_OUTPUT),)
17725b146c5SMasahiro Yamada# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
17825b146c5SMasahiro Yamada# expand a shell special character '~'. We use a somewhat tedious way here.
17925b146c5SMasahiro Yamadaabs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
18025b146c5SMasahiro Yamada$(if $(abs_objtree),, \
18125b146c5SMasahiro Yamada     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
18225b146c5SMasahiro Yamada
18325b146c5SMasahiro Yamada# $(realpath ...) resolves symlinks
18425b146c5SMasahiro Yamadaabs_objtree := $(realpath $(abs_objtree))
18525b146c5SMasahiro Yamadaelse
18625b146c5SMasahiro Yamadaabs_objtree := $(CURDIR)
18725b146c5SMasahiro Yamadaendif # ifneq ($(KBUILD_OUTPUT),)
18825b146c5SMasahiro Yamada
18925b146c5SMasahiro Yamadaifeq ($(abs_objtree),$(CURDIR))
19025b146c5SMasahiro Yamada# Suppress "Entering directory ..." unless we are changing the work directory.
19125b146c5SMasahiro YamadaMAKEFLAGS += --no-print-directory
19225b146c5SMasahiro Yamadaelse
19325b146c5SMasahiro Yamadaneed-sub-make := 1
19451193b76SRobert Jarzmikendif
19551193b76SRobert Jarzmik
19630cef68dSMasahiro Yamadathis-makefile := $(lastword $(MAKEFILE_LIST))
19730cef68dSMasahiro Yamadaabs_srctree := $(realpath $(dir $(this-makefile)))
1981da177e4SLinus Torvalds
19925b146c5SMasahiro Yamadaifneq ($(words $(subst :, ,$(abs_srctree))), 1)
20025b146c5SMasahiro Yamada$(error source directory cannot contain spaces or colons)
20125b146c5SMasahiro Yamadaendif
20225b146c5SMasahiro Yamada
20325b146c5SMasahiro Yamadaifneq ($(abs_srctree),$(abs_objtree))
20480463f1bSMasahiro Yamada# Look for make include files relative to root of kernel src
20580463f1bSMasahiro Yamada#
206d8285639SMasahiro Yamada# --included-dir is added for backward compatibility, but you should not rely on
207d8285639SMasahiro Yamada# it. Please add $(srctree)/ prefix to include Makefiles in the source tree.
20825b146c5SMasahiro YamadaMAKEFLAGS += --include-dir=$(abs_srctree)
20925b146c5SMasahiro Yamadaendif
2103812b8c5SMasahiro Yamada
211688931a5SMasahiro Yamadaifneq ($(filter 3.%,$(MAKE_VERSION)),)
212688931a5SMasahiro Yamada# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
213688931a5SMasahiro Yamada# We need to invoke sub-make to avoid implicit rules in the top Makefile.
214688931a5SMasahiro Yamadaneed-sub-make := 1
215688931a5SMasahiro Yamada# Cancel implicit rules for this Makefile.
21693fdddfeSMasahiro Yamada$(this-makefile): ;
217688931a5SMasahiro Yamadaendif
218688931a5SMasahiro Yamada
21925b146c5SMasahiro Yamadaexport abs_srctree abs_objtree
220221cc2d2SMasahiro Yamadaexport sub_make_done := 1
221221cc2d2SMasahiro Yamada
222688931a5SMasahiro Yamadaifeq ($(need-sub-make),1)
223688931a5SMasahiro Yamada
224121c2a13SMasahiro YamadaPHONY += $(MAKECMDGOALS) __sub-make
2250b35786dSMilton Miller
226121c2a13SMasahiro Yamada$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
22716f89098SCharles Keepax	@:
2280b35786dSMilton Miller
229c4e6fff1SCao jin# Invoke a second make in the output directory, passing relevant variables
230121c2a13SMasahiro Yamada__sub-make:
23125b146c5SMasahiro Yamada	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
2321da177e4SLinus Torvalds
233688931a5SMasahiro Yamadaendif # need-sub-make
234221cc2d2SMasahiro Yamadaendif # sub_make_done
235688931a5SMasahiro Yamada
2361da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
237688931a5SMasahiro Yamadaifeq ($(need-sub-make),)
2381da177e4SLinus Torvalds
2397ff52571SMasahiro Yamada# Do not print "Entering directory ...",
2407ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
2417ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
2427ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
2437ff52571SMasahiro Yamada
24425b146c5SMasahiro Yamadaifeq ($(abs_srctree),$(abs_objtree))
2459da0763bSMichal Marek        # building in the source tree
2469da0763bSMichal Marek        srctree := .
247051f278eSMasahiro Yamada	building_out_of_srctree :=
2489da0763bSMichal Marekelse
24925b146c5SMasahiro Yamada        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
2509da0763bSMichal Marek                # building in a subdirectory of the source tree
2519da0763bSMichal Marek                srctree := ..
2529da0763bSMichal Marek        else
25325b146c5SMasahiro Yamada                srctree := $(abs_srctree)
2549da0763bSMichal Marek        endif
255051f278eSMasahiro Yamada	building_out_of_srctree := 1
2569da0763bSMichal Marekendif
2572c1f4f12SMasahiro Yamada
25895fd3f87SMasahiro Yamadaifneq ($(KBUILD_ABS_SRCTREE),)
25995fd3f87SMasahiro Yamadasrctree := $(abs_srctree)
26095fd3f87SMasahiro Yamadaendif
2612c1f4f12SMasahiro Yamada
2627e1c0477SMichal Marekobjtree		:= .
2636b12de69SMasahiro YamadaVPATH		:= $(srctree)
2641da177e4SLinus Torvalds
265051f278eSMasahiro Yamadaexport building_out_of_srctree srctree objtree VPATH
2661da177e4SLinus Torvalds
2672c1f4f12SMasahiro Yamada# To make sure we do not include .config for any of the *config targets
2682c1f4f12SMasahiro Yamada# catch them early, and hand them over to scripts/kconfig/Makefile
2692c1f4f12SMasahiro Yamada# It is allowed to specify more targets when calling make, including
2702c1f4f12SMasahiro Yamada# mixing *config targets and build targets.
2712c1f4f12SMasahiro Yamada# For example 'make oldconfig all'.
2722c1f4f12SMasahiro Yamada# Detect when mixed targets is specified, and make a second invocation
2732c1f4f12SMasahiro Yamada# of make so .config is not included in this case either (for *config).
2742c1f4f12SMasahiro Yamada
2752c1f4f12SMasahiro Yamadaversion_h := include/generated/uapi/linux/version.h
2762c1f4f12SMasahiro Yamada
27722340a06SMasahiro Yamadaclean-targets := %clean mrproper cleandocs
27822340a06SMasahiro Yamadano-dot-config-targets := $(clean-targets) \
2792c1f4f12SMasahiro Yamada			 cscope gtags TAGS tags help% %docs check% coccicheck \
28059b2bd05SMasahiro Yamada			 $(version_h) headers headers_% archheaders archscripts \
2814623980dSDavid Engraf			 %asm-generic kernelversion %src-pkg dt_binding_check \
282*2f7ab126SMiguel Ojeda			 outputmakefile rustavailable rustfmt rustfmtcheck
283805b2e1dSMasahiro Yamada# Installation targets should not require compiler. Unfortunately, vdso_install
284805b2e1dSMasahiro Yamada# is an exception where build artifacts may be updated. This must be fixed.
285805b2e1dSMasahiro Yamadano-compiler-targets := $(no-dot-config-targets) install dtbs_install \
286805b2e1dSMasahiro Yamada			headers_install modules_install kernelrelease image_name
287993bdde9SMasahiro Yamadano-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
288993bdde9SMasahiro Yamada			  image_name
289*2f7ab126SMiguel Ojedasingle-targets := %.a %.i %.rsi %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
2902c1f4f12SMasahiro Yamada
2912042b548SMasahiro Yamadaconfig-build	:=
2922042b548SMasahiro Yamadamixed-build	:=
2932042b548SMasahiro Yamadaneed-config	:= 1
294805b2e1dSMasahiro Yamadaneed-compiler	:= 1
295d7942413SMasahiro Yamadamay-sync-config	:= 1
296394053f4SMasahiro Yamadasingle-build	:=
2972c1f4f12SMasahiro Yamada
2982c1f4f12SMasahiro Yamadaifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
2992c1f4f12SMasahiro Yamada	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
3002042b548SMasahiro Yamada		need-config :=
3012c1f4f12SMasahiro Yamada	endif
3022c1f4f12SMasahiro Yamadaendif
3032c1f4f12SMasahiro Yamada
304805b2e1dSMasahiro Yamadaifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
305805b2e1dSMasahiro Yamada	ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
306805b2e1dSMasahiro Yamada		need-compiler :=
307805b2e1dSMasahiro Yamada	endif
308805b2e1dSMasahiro Yamadaendif
309805b2e1dSMasahiro Yamada
310d7942413SMasahiro Yamadaifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
311d7942413SMasahiro Yamada	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
3122042b548SMasahiro Yamada		may-sync-config :=
313d7942413SMasahiro Yamada	endif
314d7942413SMasahiro Yamadaendif
315d7942413SMasahiro Yamada
316d7942413SMasahiro Yamadaifneq ($(KBUILD_EXTMOD),)
3172042b548SMasahiro Yamada	may-sync-config :=
318d7942413SMasahiro Yamadaendif
319d7942413SMasahiro Yamada
3202c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
321efbf9726SMasahiro Yamada        ifneq ($(filter %config,$(MAKECMDGOALS)),)
3222042b548SMasahiro Yamada		config-build := 1
3232c1f4f12SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
3242042b548SMasahiro Yamada			mixed-build := 1
3252c1f4f12SMasahiro Yamada                endif
3262c1f4f12SMasahiro Yamada        endif
3272c1f4f12SMasahiro Yamadaendif
32822340a06SMasahiro Yamada
329394053f4SMasahiro Yamada# We cannot build single targets and the others at the same time
330394053f4SMasahiro Yamadaifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
331394053f4SMasahiro Yamada	single-build := 1
332394053f4SMasahiro Yamada	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
333394053f4SMasahiro Yamada		mixed-build := 1
334394053f4SMasahiro Yamada	endif
335394053f4SMasahiro Yamadaendif
336394053f4SMasahiro Yamada
33722340a06SMasahiro Yamada# For "make -j clean all", "make -j mrproper defconfig all", etc.
33822340a06SMasahiro Yamadaifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
33922340a06SMasahiro Yamada        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
3402042b548SMasahiro Yamada		mixed-build := 1
34122340a06SMasahiro Yamada        endif
34222340a06SMasahiro Yamadaendif
34322340a06SMasahiro Yamada
3442c1f4f12SMasahiro Yamada# install and modules_install need also be processed one by one
3452c1f4f12SMasahiro Yamadaifneq ($(filter install,$(MAKECMDGOALS)),)
3462c1f4f12SMasahiro Yamada        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
3472042b548SMasahiro Yamada		mixed-build := 1
3482c1f4f12SMasahiro Yamada        endif
3492c1f4f12SMasahiro Yamadaendif
3502c1f4f12SMasahiro Yamada
3512042b548SMasahiro Yamadaifdef mixed-build
3522c1f4f12SMasahiro Yamada# ===========================================================================
3532c1f4f12SMasahiro Yamada# We're called with mixed targets (*config and build targets).
3542c1f4f12SMasahiro Yamada# Handle them one by one.
3552c1f4f12SMasahiro Yamada
3562c1f4f12SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
3572c1f4f12SMasahiro Yamada
358121c2a13SMasahiro Yamada$(MAKECMDGOALS): __build_one_by_one
3592c1f4f12SMasahiro Yamada	@:
3602c1f4f12SMasahiro Yamada
3612c1f4f12SMasahiro Yamada__build_one_by_one:
3622c1f4f12SMasahiro Yamada	$(Q)set -e; \
3632c1f4f12SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
3642c1f4f12SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
3652c1f4f12SMasahiro Yamada	done
3662c1f4f12SMasahiro Yamada
3672042b548SMasahiro Yamadaelse # !mixed-build
3682c1f4f12SMasahiro Yamada
3693204a7fbSMasahiro Yamadainclude $(srctree)/scripts/Kbuild.include
3702c1f4f12SMasahiro Yamada
3712c1f4f12SMasahiro Yamada# Read KERNELRELEASE from include/config/kernel.release (if it exists)
3722c1f4f12SMasahiro YamadaKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
3732c1f4f12SMasahiro YamadaKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
3742c1f4f12SMasahiro Yamadaexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
3752c1f4f12SMasahiro Yamada
3763204a7fbSMasahiro Yamadainclude $(srctree)/scripts/subarch.include
3771da177e4SLinus Torvalds
3781da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
3791da177e4SLinus Torvalds# ---------------------------------------------------------------------------
3801da177e4SLinus Torvalds#
3811da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
3821da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
3831da177e4SLinus Torvalds# ARCH can be set during invocation of make:
3841da177e4SLinus Torvalds# make ARCH=ia64
3851da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
3861da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
3871da177e4SLinus Torvalds
3881da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
3891da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
3901da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
3911da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
3921da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
3931da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
3941da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
3951da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
3962331d1a6SSam RavnborgARCH		?= $(SUBARCH)
3971da177e4SLinus Torvalds
3981da177e4SLinus Torvalds# Architecture as present in compile.h
3991da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
4006752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
4011da177e4SLinus Torvalds
402d746d647SSam Ravnborg# Additional ARCH settings for x86
403d746d647SSam Ravnborgifeq ($(ARCH),i386)
404d746d647SSam Ravnborg        SRCARCH := x86
405d746d647SSam Ravnborgendif
406d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
407d746d647SSam Ravnborg        SRCARCH := x86
408d746d647SSam Ravnborgendif
40974b469f2SSam Ravnborg
4105e538790SSam Ravnborg# Additional ARCH settings for sparc
411e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
412e69f58c0SNamhyung Kim       SRCARCH := sparc
413e69f58c0SNamhyung Kimendif
414a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
4155e538790SSam Ravnborg       SRCARCH := sparc
416a439fe51SSam Ravnborgendif
4172fb9b1bdSSam Ravnborg
4185f6e0fe0SMasahiro Yamada# Additional ARCH settings for parisc
4195f6e0fe0SMasahiro Yamadaifeq ($(ARCH),parisc64)
4205f6e0fe0SMasahiro Yamada       SRCARCH := parisc
4215f6e0fe0SMasahiro Yamadaendif
4225f6e0fe0SMasahiro Yamada
423f02aa48dSMasahiro Yamadaexport cross_compiling :=
424f02aa48dSMasahiro Yamadaifneq ($(SRCARCH),$(SUBARCH))
425f02aa48dSMasahiro Yamadacross_compiling := 1
426f02aa48dSMasahiro Yamadaendif
427f02aa48dSMasahiro Yamada
42814cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
42941263fc6SBen Gardinerexport KCONFIG_CONFIG
43014cdd3c4SRoman Zippel
4311da177e4SLinus Torvalds# SHELL used by kbuild
432858805b3SMasahiro YamadaCONFIG_SHELL := sh
4331da177e4SLinus Torvalds
4346d79a7b4SMasahiro YamadaHOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
4356d79a7b4SMasahiro YamadaHOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
4366d79a7b4SMasahiro YamadaHOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
437d7f14c66SUwe Kleine-König
438a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
439e9c28192SNathan Chancellorifneq ($(filter %/,$(LLVM)),)
440e9c28192SNathan ChancellorLLVM_PREFIX := $(LLVM)
441e9c28192SNathan Chancellorelse ifneq ($(filter -%,$(LLVM)),)
442e9c28192SNathan ChancellorLLVM_SUFFIX := $(LLVM)
443e9c28192SNathan Chancellorendif
444e9c28192SNathan Chancellor
445e9c28192SNathan ChancellorHOSTCC	= $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
446e9c28192SNathan ChancellorHOSTCXX	= $(LLVM_PREFIX)clang++$(LLVM_SUFFIX)
447a0d1c951SMasahiro Yamadaelse
4481da177e4SLinus TorvaldsHOSTCC	= gcc
4491da177e4SLinus TorvaldsHOSTCXX	= g++
450a0d1c951SMasahiro Yamadaendif
451*2f7ab126SMiguel OjedaHOSTRUSTC = rustc
452d5ea4fecSChun-Tse ShaoHOSTPKG_CONFIG	= pkg-config
4537f3a59dbSMasahiro Yamada
454f67695c9SElliot BermanKBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
4551e240781SArnd Bergmann			 -O2 -fomit-frame-pointer -std=gnu11 \
4564d94f910SMark Rutland			 -Wdeclaration-after-statement
457f67695c9SElliot BermanKBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
458f67695c9SElliot BermanKBUILD_USERLDFLAGS := $(USERLDFLAGS)
4597f3a59dbSMasahiro Yamada
460*2f7ab126SMiguel Ojeda# These flags apply to all Rust code in the tree, including the kernel and
461*2f7ab126SMiguel Ojeda# host programs.
462*2f7ab126SMiguel Ojedaexport rust_common_flags := --edition=2021 \
463*2f7ab126SMiguel Ojeda			    -Zbinary_dep_depinfo=y \
464*2f7ab126SMiguel Ojeda			    -Dunsafe_op_in_unsafe_fn -Drust_2018_idioms \
465*2f7ab126SMiguel Ojeda			    -Dunreachable_pub -Dnon_ascii_idents \
466*2f7ab126SMiguel Ojeda			    -Wmissing_docs \
467*2f7ab126SMiguel Ojeda			    -Drustdoc::missing_crate_level_docs \
468*2f7ab126SMiguel Ojeda			    -Dclippy::correctness -Dclippy::style \
469*2f7ab126SMiguel Ojeda			    -Dclippy::suspicious -Dclippy::complexity \
470*2f7ab126SMiguel Ojeda			    -Dclippy::perf \
471*2f7ab126SMiguel Ojeda			    -Dclippy::let_unit_value -Dclippy::mut_mut \
472*2f7ab126SMiguel Ojeda			    -Dclippy::needless_bitwise_bool \
473*2f7ab126SMiguel Ojeda			    -Dclippy::needless_continue \
474*2f7ab126SMiguel Ojeda			    -Wclippy::dbg_macro
475*2f7ab126SMiguel Ojeda
476f67695c9SElliot BermanKBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
477735aab1eSMasahiro YamadaKBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
478*2f7ab126SMiguel OjedaKBUILD_HOSTRUSTFLAGS := $(rust_common_flags) -O -Cstrip=debuginfo \
479*2f7ab126SMiguel Ojeda			-Zallow-features= $(HOSTRUSTFLAGS)
480f92d19e0SLaura AbbottKBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
481f92d19e0SLaura AbbottKBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
4821da177e4SLinus Torvalds
4831da177e4SLinus Torvalds# Make variables (CC, etc...)
4841da177e4SLinus TorvaldsCPP		= $(CC) -E
485a0d1c951SMasahiro Yamadaifneq ($(LLVM),)
486e9c28192SNathan ChancellorCC		= $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
487e9c28192SNathan ChancellorLD		= $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
488e9c28192SNathan ChancellorAR		= $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
489e9c28192SNathan ChancellorNM		= $(LLVM_PREFIX)llvm-nm$(LLVM_SUFFIX)
490e9c28192SNathan ChancellorOBJCOPY		= $(LLVM_PREFIX)llvm-objcopy$(LLVM_SUFFIX)
491e9c28192SNathan ChancellorOBJDUMP		= $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX)
492e9c28192SNathan ChancellorREADELF		= $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX)
493e9c28192SNathan ChancellorSTRIP		= $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
494a0d1c951SMasahiro Yamadaelse
495a0d1c951SMasahiro YamadaCC		= $(CROSS_COMPILE)gcc
496a0d1c951SMasahiro YamadaLD		= $(CROSS_COMPILE)ld
4971da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
4981da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
4991da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
5001da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
501eefb8c12SDmitry GolovinREADELF		= $(CROSS_COMPILE)readelf
502a0d1c951SMasahiro YamadaSTRIP		= $(CROSS_COMPILE)strip
503a0d1c951SMasahiro Yamadaendif
504*2f7ab126SMiguel OjedaRUSTC		= rustc
505*2f7ab126SMiguel OjedaRUSTDOC		= rustdoc
506*2f7ab126SMiguel OjedaRUSTFMT		= rustfmt
507*2f7ab126SMiguel OjedaCLIPPY_DRIVER	= clippy-driver
508*2f7ab126SMiguel OjedaBINDGEN		= bindgen
509*2f7ab126SMiguel OjedaCARGO		= cargo
510e83b9f55SAndrii NakryikoPAHOLE		= pahole
511c9a0f3b8SJiri OlsaRESOLVE_BTFIDS	= $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
51273a4f6dbSMasahiro YamadaLEX		= flex
51373a4f6dbSMasahiro YamadaYACC		= bison
5141da177e4SLinus TorvaldsAWK		= awk
515caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
516436e980eSDominique MartinetDEPMOD		= depmod
5171da177e4SLinus TorvaldsPERL		= perl
518e9781b52SMasahiro YamadaPYTHON3		= python3
5191da177e4SLinus TorvaldsCHECK		= sparse
520858805b3SMasahiro YamadaBASH		= bash
521e4a42c82SDenis EfremovKGZIP		= gzip
522e4a42c82SDenis EfremovKBZIP2		= bzip2
523e4a42c82SDenis EfremovKLZOP		= lzop
5248dfb61dcSDenis EfremovLZMA		= lzma
5258dfb61dcSDenis EfremovLZ4		= lz4c
5268dfb61dcSDenis EfremovXZ		= xz
52748f7ddf7SNick TerrellZSTD		= zstd
5288dfb61dcSDenis Efremov
5299741e07eSJiri OlsaPAHOLE_FLAGS	= $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
5309741e07eSJiri Olsa
53180a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
5326c49f359SLuc Van Oostenryck		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
5330c22be07SDouglas AndersonNOSTDINC_FLAGS :=
5346588169dSSam RavnborgCFLAGS_MODULE   =
535*2f7ab126SMiguel OjedaRUSTFLAGS_MODULE =
5366588169dSSam RavnborgAFLAGS_MODULE   =
5376588169dSSam RavnborgLDFLAGS_MODULE  =
5381da177e4SLinus TorvaldsCFLAGS_KERNEL	=
539*2f7ab126SMiguel OjedaRUSTFLAGS_KERNEL =
5401da177e4SLinus TorvaldsAFLAGS_KERNEL	=
541b36fad65SMichal MarekLDFLAGS_vmlinux =
5421da177e4SLinus Torvalds
543abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
544abbf1590SDavid HowellsUSERINCLUDE    := \
5459d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
5469d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
547abbf1590SDavid Howells		-I$(srctree)/include/uapi \
5483308b285SArnd Bergmann		-I$(objtree)/include/generated/uapi \
549ce6ed1c4SMasahiro Yamada                -include $(srctree)/include/linux/compiler-version.h \
550abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
551abbf1590SDavid Howells
5521da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
5531da177e4SLinus Torvalds# Needed to be compatible with the O= option
554abbf1590SDavid HowellsLINUXINCLUDE    := \
5559d022c54SMasahiro Yamada		-I$(srctree)/arch/$(SRCARCH)/include \
5569d022c54SMasahiro Yamada		-I$(objtree)/arch/$(SRCARCH)/include/generated \
557051f278eSMasahiro Yamada		$(if $(building_out_of_srctree),-I$(srctree)/include) \
558f8224f7fSMasahiro Yamada		-I$(objtree)/include \
559f8224f7fSMasahiro Yamada		$(USERINCLUDE)
5601da177e4SLinus Torvalds
56142a92bccSMasahiro YamadaKBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
562eeb5687aSMasahiro YamadaKBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
56342a92bccSMasahiro Yamada		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
564b89f25eaSLuc Van Oostenryck		   -Werror=implicit-function-declaration -Werror=implicit-int \
565172aad81SOlaf Hering		   -Werror=return-type -Wno-format-security \
566e8c07082SArnd Bergmann		   -std=gnu11
567433dc2ebSMasahiro YamadaKBUILD_CPPFLAGS := -D__KERNEL__
568*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS := $(rust_common_flags) \
569*2f7ab126SMiguel Ojeda		    --target=$(objtree)/rust/target.json \
570*2f7ab126SMiguel Ojeda		    -Cpanic=abort -Cembed-bitcode=n -Clto=n \
571*2f7ab126SMiguel Ojeda		    -Cforce-unwind-tables=n -Ccodegen-units=1 \
572*2f7ab126SMiguel Ojeda		    -Csymbol-mangling-version=v0 \
573*2f7ab126SMiguel Ojeda		    -Crelocation-model=static \
574*2f7ab126SMiguel Ojeda		    -Zfunction-sections=n \
575*2f7ab126SMiguel Ojeda		    -Dclippy::float_arithmetic
576*2f7ab126SMiguel Ojeda
57780c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
57880c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
579*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL :=
5806588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
5816588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
582*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_MODULE := --cfg MODULE
58310df0638SMasahiro YamadaKBUILD_LDFLAGS_MODULE :=
584d503ac53SMasahiro YamadaKBUILD_LDFLAGS :=
5855241ab4cSMasahiro YamadaCLANG_FLAGS :=
5861da177e4SLinus Torvalds
587*2f7ab126SMiguel Ojedaifeq ($(KBUILD_CLIPPY),1)
588*2f7ab126SMiguel Ojeda	RUSTC_OR_CLIPPY_QUIET := CLIPPY
589*2f7ab126SMiguel Ojeda	RUSTC_OR_CLIPPY = $(CLIPPY_DRIVER)
590*2f7ab126SMiguel Ojedaelse
591*2f7ab126SMiguel Ojeda	RUSTC_OR_CLIPPY_QUIET := RUSTC
592*2f7ab126SMiguel Ojeda	RUSTC_OR_CLIPPY = $(RUSTC)
593*2f7ab126SMiguel Ojedaendif
594*2f7ab126SMiguel Ojeda
595*2f7ab126SMiguel Ojedaifdef RUST_LIB_SRC
596*2f7ab126SMiguel Ojeda	export RUST_LIB_SRC
597*2f7ab126SMiguel Ojedaendif
598*2f7ab126SMiguel Ojeda
599*2f7ab126SMiguel Ojeda# Allows the usage of unstable features in stable compilers.
600*2f7ab126SMiguel Ojedaexport RUSTC_BOOTSTRAP := 1
601*2f7ab126SMiguel Ojeda
602d5ea4fecSChun-Tse Shaoexport ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
603*2f7ab126SMiguel Ojedaexport RUSTC RUSTDOC RUSTFMT RUSTC_OR_CLIPPY_QUIET RUSTC_OR_CLIPPY BINDGEN CARGO
604*2f7ab126SMiguel Ojedaexport HOSTRUSTC KBUILD_HOSTRUSTFLAGS
605d9b5665fSVasily Gorbikexport CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
606d8d2d382SMasahiro Yamadaexport PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
60748f7ddf7SNick Terrellexport KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
6087bac9870SVasily Gorbikexport KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
609f67695c9SElliot Bermanexport KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
6101da177e4SLinus Torvalds
611d503ac53SMasahiro Yamadaexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
6120e410e15SAndrey Konovalovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
613*2f7ab126SMiguel Ojedaexport KBUILD_RUSTFLAGS RUSTFLAGS_KERNEL RUSTFLAGS_MODULE
614222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
615*2f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE
616*2f7ab126SMiguel Ojedaexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL
6179741e07eSJiri Olsaexport PAHOLE_FLAGS
6181da177e4SLinus Torvalds
6191da177e4SLinus Torvalds# Files to ignore in find ... statements
6201da177e4SLinus Torvalds
621ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
622ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
623ae63b2d7SPrarit Bhargava			  -prune -o
624450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
625450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
6261da177e4SLinus Torvalds
6271da177e4SLinus Torvalds# ===========================================================================
6281da177e4SLinus Torvalds# Rules shared between *config targets and build targets
6291da177e4SLinus Torvalds
630312a3d09SCao jin# Basic helpers built in scripts/basic/
6314f193362SPaul SmithPHONY += scripts_basic
6321da177e4SLinus Torvaldsscripts_basic:
6331da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
6341da177e4SLinus Torvalds
6354f193362SPaul SmithPHONY += outputmakefile
6362728fcfaSMasahiro Yamadaifdef building_out_of_srctree
637e8e83a23SMasahiro Yamada# Before starting out-of-tree build, make sure the source tree is clean.
638fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
639fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
640fd5f0cd6SJan Beulich# output directory.
6413a51ff34SVladimir Kondratiev# At the same time when output Makefile generated, generate .gitignore to
6423a51ff34SVladimir Kondratiev# ignore whole output directory
6432728fcfaSMasahiro Yamada
6442728fcfaSMasahiro Yamadaquiet_cmd_makefile = GEN     Makefile
6452728fcfaSMasahiro Yamada      cmd_makefile = { \
6462728fcfaSMasahiro Yamada	echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \
6472728fcfaSMasahiro Yamada	echo "include $(srctree)/Makefile"; \
6482728fcfaSMasahiro Yamada	} > Makefile
6492728fcfaSMasahiro Yamada
6501da177e4SLinus Torvaldsoutputmakefile:
651e8e83a23SMasahiro Yamada	$(Q)if [ -f $(srctree)/.config -o \
652e8e83a23SMasahiro Yamada		 -d $(srctree)/include/config -o \
653e8e83a23SMasahiro Yamada		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
654e8e83a23SMasahiro Yamada		echo >&2 "***"; \
655e8e83a23SMasahiro Yamada		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
656e8e83a23SMasahiro Yamada		echo >&2 "*** in $(abs_srctree)";\
657e8e83a23SMasahiro Yamada		echo >&2 "***"; \
658e8e83a23SMasahiro Yamada		false; \
659e8e83a23SMasahiro Yamada	fi
66092979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
6612728fcfaSMasahiro Yamada	$(call cmd,makefile)
662156e7cbbSMasahiro Yamada	$(Q)test -e .gitignore || \
663156e7cbbSMasahiro Yamada	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
664fd5f0cd6SJan Beulichendif
6651da177e4SLinus Torvalds
666db07562aSNick Desaulniers# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
667db07562aSNick Desaulniers# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
668db07562aSNick Desaulniers# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
669db07562aSNick Desaulniers# and from include/config/auto.conf.cmd to detect the compiler upgrade.
6706072b2c4SMasahiro YamadaCC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
671db07562aSNick Desaulniers
672db07562aSNick Desaulniersifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
6736f5b41a2SNick Desaulniersinclude $(srctree)/scripts/Makefile.clang
674ae6b289aSChris Friesendif
675ae6b289aSChris Fries
67657fd251cSMasahiro Yamada# Include this also for config targets because some architectures need
67757fd251cSMasahiro Yamada# cc-cross-prefix to determine CROSS_COMPILE.
678805b2e1dSMasahiro Yamadaifdef need-compiler
67957fd251cSMasahiro Yamadainclude $(srctree)/scripts/Makefile.compiler
680805b2e1dSMasahiro Yamadaendif
68157fd251cSMasahiro Yamada
6822042b548SMasahiro Yamadaifdef config-build
6831da177e4SLinus Torvalds# ===========================================================================
6841da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
6851da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
6861da177e4SLinus Torvalds
6871da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
6881da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
6891da177e4SLinus Torvalds# used for 'make defconfig'
6903204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
691315bab4eSMasahiro Yamadaexport KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
6921da177e4SLinus Torvalds
69336de077bSMasahiro Yamadaconfig: outputmakefile scripts_basic FORCE
69431110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
69531110ebbSSam Ravnborg
69636de077bSMasahiro Yamada%config: outputmakefile scripts_basic FORCE
6971da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
6981da177e4SLinus Torvalds
6992042b548SMasahiro Yamadaelse #!config-build
7001da177e4SLinus Torvalds# ===========================================================================
7011da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
7021da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
7031da177e4SLinus Torvalds
7042c1f4f12SMasahiro Yamada# If building an external module we do not care about the all: rule
705121c2a13SMasahiro Yamada# but instead __all depend on modules
7062c1f4f12SMasahiro YamadaPHONY += all
7072c1f4f12SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
708121c2a13SMasahiro Yamada__all: all
7092c1f4f12SMasahiro Yamadaelse
710121c2a13SMasahiro Yamada__all: modules
7112c1f4f12SMasahiro Yamadaendif
7122c1f4f12SMasahiro Yamada
7132c1f4f12SMasahiro Yamada# Decide whether to build built-in, modular, or both.
7142c1f4f12SMasahiro Yamada# Normally, just do built-in.
7152c1f4f12SMasahiro Yamada
7162c1f4f12SMasahiro YamadaKBUILD_MODULES :=
7172c1f4f12SMasahiro YamadaKBUILD_BUILTIN := 1
7182c1f4f12SMasahiro Yamada
7192c1f4f12SMasahiro Yamada# If we have only "make modules", don't compile built-in objects.
7202c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),modules)
7214b50c8c4SMasahiro Yamada  KBUILD_BUILTIN :=
7222c1f4f12SMasahiro Yamadaendif
7232c1f4f12SMasahiro Yamada
7242c1f4f12SMasahiro Yamada# If we have "make <whatever> modules", compile modules
7252c1f4f12SMasahiro Yamada# in addition to whatever we do anyway.
7262c1f4f12SMasahiro Yamada# Just "make" or "make all" shall build modules as well
7272c1f4f12SMasahiro Yamada
7286ad7cbc0SNathan Huckleberryifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
7292c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
7302c1f4f12SMasahiro Yamadaendif
7312c1f4f12SMasahiro Yamada
7322c1f4f12SMasahiro Yamadaifeq ($(MAKECMDGOALS),)
7332c1f4f12SMasahiro Yamada  KBUILD_MODULES := 1
7342c1f4f12SMasahiro Yamadaendif
7352c1f4f12SMasahiro Yamada
7362c1f4f12SMasahiro Yamadaexport KBUILD_MODULES KBUILD_BUILTIN
7372c1f4f12SMasahiro Yamada
7382042b548SMasahiro Yamadaifdef need-config
739d93a18f2SMasahiro Yamadainclude include/config/auto.conf
740d93a18f2SMasahiro Yamadaendif
741d93a18f2SMasahiro Yamada
7421da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
7431da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
744d92cc4d5SMasahiro Yamadacore-y		:= init/ usr/ arch/$(SRCARCH)/
745f96182e9SMasahiro Yamadadrivers-y	:= drivers/ sound/
746d93a18f2SMasahiro Yamadadrivers-$(CONFIG_SAMPLES) += samples/
7478b5f4eb3SMasahiro Yamadadrivers-$(CONFIG_NET) += net/
7488b5f4eb3SMasahiro Yamadadrivers-y	+= virt/
7491da177e4SLinus Torvaldslibs-y		:= lib/
7501da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
7511da177e4SLinus Torvalds
752315bab4eSMasahiro Yamada# The all: target is the default when no target is given on the
753315bab4eSMasahiro Yamada# command line.
754315bab4eSMasahiro Yamada# This allow a user to issue only 'make' to build a kernel including modules
755315bab4eSMasahiro Yamada# Defaults to vmlinux, but the arch makefile usually adds further targets
756315bab4eSMasahiro Yamadaall: vmlinux
757315bab4eSMasahiro Yamada
7587d73c3e9SNick DesaulniersCFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage
7597d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
7607d73c3e9SNick DesaulniersCFLAGS_GCOV	+= -fno-tree-loop-im
7617d73c3e9SNick Desaulniersendif
7625aadfdebSMasahiro Yamadaexport CFLAGS_GCOV
763315bab4eSMasahiro Yamada
764b1f4ff74SPaulo Zanoni# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
765b1f4ff74SPaulo Zanoniifdef CONFIG_FUNCTION_TRACER
766b1f4ff74SPaulo Zanoni  CC_FLAGS_FTRACE := -pg
767b1f4ff74SPaulo Zanoniendif
768b1f4ff74SPaulo Zanoni
7693204a7fbSMasahiro Yamadainclude $(srctree)/arch/$(SRCARCH)/Makefile
770315bab4eSMasahiro Yamada
7712042b548SMasahiro Yamadaifdef need-config
7722042b548SMasahiro Yamadaifdef may-sync-config
773315bab4eSMasahiro Yamada# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
774315bab4eSMasahiro Yamada# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
775315bab4eSMasahiro Yamada# because some architectures define CROSS_COMPILE there.
776d2f8ae0eSMasahiro Yamadainclude include/config/auto.conf.cmd
7771da177e4SLinus Torvalds
77805850719SMasahiro Yamada$(KCONFIG_CONFIG):
77905850719SMasahiro Yamada	@echo >&2 '***'
78005850719SMasahiro Yamada	@echo >&2 '*** Configuration file "$@" not found!'
78105850719SMasahiro Yamada	@echo >&2 '***'
78205850719SMasahiro Yamada	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
78305850719SMasahiro Yamada	@echo >&2 '*** "make menuconfig" or "make xconfig").'
78405850719SMasahiro Yamada	@echo >&2 '***'
78505850719SMasahiro Yamada	@/bin/false
7861da177e4SLinus Torvalds
78761277981SUlf Magnusson# The actual configuration files used during the build are stored in
78861277981SUlf Magnusson# include/generated/ and include/config/. Update them if .config is newer than
78961277981SUlf Magnusson# include/config/auto.conf (which mirrors .config).
7909390dff6SMasahiro Yamada#
7919390dff6SMasahiro Yamada# This exploits the 'multi-target pattern rule' trick.
7929390dff6SMasahiro Yamada# The syncconfig should be executed only once to make all the targets.
793f463c351SMasahiro Yamada# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
794d952cfafSMasahiro Yamada#
795d952cfafSMasahiro Yamada# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
796d952cfafSMasahiro Yamada# so you cannot notice that Kconfig is waiting for the user input.
797*2f7ab126SMiguel Ojeda%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h %/generated/rustc_cfg: $(KCONFIG_CONFIG)
798d952cfafSMasahiro Yamada	$(Q)$(kecho) "  SYNC    $@"
799d952cfafSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
8002042b548SMasahiro Yamadaelse # !may-sync-config
801d7942413SMasahiro Yamada# External modules and some install targets need include/generated/autoconf.h
802d7942413SMasahiro Yamada# and include/config/auto.conf but do not care if they are up-to-date.
803d7942413SMasahiro Yamada# Use auto.conf to trigger the test
8049ee4e336SSam RavnborgPHONY += include/config/auto.conf
8059ee4e336SSam Ravnborg
8069ee4e336SSam Ravnborginclude/config/auto.conf:
807264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
8085369f550SMichal Marek	echo >&2;							\
8095369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
8105369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
8115369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
8125369f550SMichal Marek	echo >&2 ;							\
8139ee4e336SSam Ravnborg	/bin/false)
8149ee4e336SSam Ravnborg
815d7942413SMasahiro Yamadaendif # may-sync-config
8162042b548SMasahiro Yamadaendif # need-config
8171da177e4SLinus Torvalds
8187d73c3e9SNick DesaulniersKBUILD_CFLAGS	+= -fno-delete-null-pointer-checks
819ef6000b4SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
820bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
821bd664f6bSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
8226f303d60SLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
823a1c48bb1SGeert Uytterhoeven
82415f5db60SMasahiro Yamadaifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
825a0f97e06SSam RavnborgKBUILD_CFLAGS += -O2
826*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=2
82715f5db60SMasahiro Yamadaelse ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
82815f5db60SMasahiro YamadaKBUILD_CFLAGS += -Os
829*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Copt-level=s
8301da177e4SLinus Torvaldsendif
8311da177e4SLinus Torvalds
832*2f7ab126SMiguel Ojeda# Always set `debug-assertions` and `overflow-checks` because their default
833*2f7ab126SMiguel Ojeda# depends on `opt-level` and `debug-assertions`, respectively.
834*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n)
835*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Coverflow-checks=$(if $(CONFIG_RUST_OVERFLOW_CHECKS),y,n)
836*2f7ab126SMiguel Ojeda
83769102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
8387d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
8397d73c3e9SNick Desaulniers# gcc-10 renamed --param=allow-store-data-races=0 to
8407d73c3e9SNick Desaulniers# -fno-allow-store-data-races.
84169102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
842b1112139SSergei TrofimovichKBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
8437d73c3e9SNick Desaulniersendif
84469102311SJiri Kosina
8451873e870SAndi Kleenifdef CONFIG_READABLE_ASM
8461873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
8471873e870SAndi Kleen# reorder blocks reorders the control in the function
8481873e870SAndi Kleen# ipa clone creates specialized cloned functions
8491873e870SAndi Kleen# partial inlining inlines only parts of functions
8507d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
8511873e870SAndi Kleenendif
8521873e870SAndi Kleen
85308f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
854a83e4ca2SMasahiro YamadaKBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
85535bb5b1eSAndi Kleenendif
85635bb5b1eSAndi Kleen
857893ab004SMasahiro Yamadastackp-flags-y                                    := -fno-stack-protector
858050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
859050e9baaSLinus Torvaldsstackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
8602a61f474SMasahiro Yamada
8612a61f474SMasahiro YamadaKBUILD_CFLAGS += $(stackp-flags-y)
862e06b8b98SSam Ravnborg
8633fe617ccSLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror
864f0be87c4SLinus TorvaldsKBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds
865e92e2634SMasahiro YamadaKBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
8663fe617ccSLinus Torvalds
867*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings
868*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)
869*2f7ab126SMiguel Ojeda
870076f421dSMasahiro Yamadaifdef CONFIG_CC_IS_CLANG
871a1494304SMasahiro YamadaKBUILD_CPPFLAGS += -Qunused-arguments
872e8c07082SArnd Bergmann# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable.
873a1494304SMasahiro YamadaKBUILD_CFLAGS += -Wno-gnu
874d936eb23SLinus Torvaldselse
875d936eb23SLinus Torvalds
87649832c81SRandy Dunlap# gcc inanely warns about local variables called 'main'
87749832c81SRandy DunlapKBUILD_CFLAGS += -Wno-main
878cfe17c9bSMasahiro Yamadaendif
879cfe17c9bSMasahiro Yamada
880885480b0SNathan Chancellor# These warnings generated too much noise in a regular build.
881885480b0SNathan Chancellor# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
882885480b0SNathan ChancellorKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
8830a5f4176SSodagudi PrasadKBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
8846272cc38SNathan Chancellor
88549beadbdSLinus Torvalds# These result in bogus false positives
88649beadbdSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
88749beadbdSLinus Torvalds
8881da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
889a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
890*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += -Cforce-frame-pointers=y
8911da177e4SLinus Torvaldselse
8927e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
8937e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
8947e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
8957e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
8967e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
897*2f7ab126SMiguel Ojeda# In the Rust target specification, "frame-pointer" is set explicitly
898*2f7ab126SMiguel Ojeda# to "may-omit".
8997e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
900a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
9011da177e4SLinus Torvaldsendif
9027e9501fdSRabin Vincentendif
9031da177e4SLinus Torvalds
904f0fe00d4Sglider@google.com# Initialize all stack variables with a 0xAA pattern.
905f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_PATTERN
906709a972eSKees CookKBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
907709a972eSKees Cookendif
908709a972eSKees Cook
909f0fe00d4Sglider@google.com# Initialize all stack variables with a zero value.
910f0fe00d4Sglider@google.comifdef CONFIG_INIT_STACK_ALL_ZERO
911f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -ftrivial-auto-var-init=zero
912f02003c8SKees Cookifdef CONFIG_CC_IS_CLANG
913f02003c8SKees Cook# https://bugs.llvm.org/show_bug.cgi?id=45497
914f0fe00d4Sglider@google.comKBUILD_CFLAGS	+= -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
915f0fe00d4Sglider@google.comendif
916f02003c8SKees Cookendif
917f0fe00d4Sglider@google.com
91839218ff4SKees Cook# While VLAs have been removed, GCC produces unreachable stack probes
91939218ff4SKees Cook# for the randomize_kstack_offset feature. Disable it for all compilers.
92039218ff4SKees CookKBUILD_CFLAGS	+= $(call cc-option, -fno-stack-clash-protection)
92139218ff4SKees Cook
922a82adfd5SKees Cook# Clear used registers at func exit (to reduce data lifetime and ROP gadgets).
923a82adfd5SKees Cookifdef CONFIG_ZERO_CALL_USED_REGS
924a82adfd5SKees CookKBUILD_CFLAGS	+= -fzero-call-used-regs=used-gpr
925a82adfd5SKees Cookendif
926a82adfd5SKees Cook
927606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
9283b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_CC
92907d04081SVasily Gorbik  CC_FLAGS_FTRACE	+= -mrecord-mcount
9302f4df001SVasily Gorbik  ifdef CONFIG_HAVE_NOP_MCOUNT
9312f4df001SVasily Gorbik    ifeq ($(call cc-option-yn, -mnop-mcount),y)
9322f4df001SVasily Gorbik      CC_FLAGS_FTRACE	+= -mnop-mcount
9332f4df001SVasily Gorbik      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
9342f4df001SVasily Gorbik    endif
9352f4df001SVasily Gorbik  endif
93607d04081SVasily Gorbikendif
93722c8542dSSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
93822c8542dSSami Tolvanen  CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
93922c8542dSSami Tolvanenendif
9403b15cdc1SSami Tolvanenifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
9413b15cdc1SSami Tolvanen  ifdef CONFIG_HAVE_C_RECORDMCOUNT
9423b15cdc1SSami Tolvanen    BUILD_C_RECORDMCOUNT := y
9433b15cdc1SSami Tolvanen    export BUILD_C_RECORDMCOUNT
9443b15cdc1SSami Tolvanen  endif
9453b15cdc1SSami Tolvanenendif
946a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
9477d73c3e9SNick Desaulniers  # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
948f28bc3c3SVasily Gorbik  ifeq ($(call cc-option-yn, -mfentry),y)
949f28bc3c3SVasily Gorbik    CC_FLAGS_FTRACE	+= -mfentry
950f28bc3c3SVasily Gorbik    CC_FLAGS_USING	+= -DCC_USING_FENTRY
951a2546faeSSteven Rostedt  endif
952f28bc3c3SVasily Gorbikendif
953f28bc3c3SVasily Gorbikexport CC_FLAGS_FTRACE
954f28bc3c3SVasily GorbikKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
955f28bc3c3SVasily GorbikKBUILD_AFLAGS	+= $(CC_FLAGS_USING)
95616444a8aSArnaldo Carvalho de Meloendif
95716444a8aSArnaldo Carvalho de Melo
95891341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
95991341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
9607d73c3e9SNick DesaulniersKBUILD_CFLAGS += -fno-inline-functions-called-once
96191341d4bSSam Ravnborgendif
96291341d4bSSam Ravnborg
963*2f7ab126SMiguel Ojeda# `rustc`'s `-Zfunction-sections` applies to data too (as of 1.59.0).
96490ad4052SMasahiro Yamadaifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
965e85d1d65SMasahiro YamadaKBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
966*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS_KERNEL += -Zfunction-sections=y
967e85d1d65SMasahiro YamadaLDFLAGS_vmlinux += --gc-sections
96890ad4052SMasahiro Yamadaendif
96990ad4052SMasahiro Yamada
970d08b9f0cSSami Tolvanenifdef CONFIG_SHADOW_CALL_STACK
971d08b9f0cSSami TolvanenCC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
972d08b9f0cSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
973d08b9f0cSSami Tolvanenexport CC_FLAGS_SCS
974d08b9f0cSSami Tolvanenendif
975d08b9f0cSSami Tolvanen
976dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG
977dc5723b0SSami Tolvanenifdef CONFIG_LTO_CLANG_THIN
9782b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto=thin -fsplit-lto-unit
9797f69180bSMasahiro YamadaKBUILD_LDFLAGS	+= --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
980dc5723b0SSami Tolvanenelse
9812b868952SAlexander LobakinCC_FLAGS_LTO	:= -flto
982dc5723b0SSami Tolvanenendif
983dc5723b0SSami TolvanenCC_FLAGS_LTO	+= -fvisibility=hidden
98422d429e7SSami Tolvanen
98522d429e7SSami Tolvanen# Limit inlining across translation units to reduce binary size
98622d429e7SSami TolvanenKBUILD_LDFLAGS += -mllvm -import-instr-limit=5
98724845dcbSNick Desaulniers
9880236526dSTor Vic# Check for frame size exceeding threshold during prolog/epilog insertion
9890236526dSTor Vic# when using lld < 13.0.0.
99024845dcbSNick Desaulniersifneq ($(CONFIG_FRAME_WARN),0)
9910236526dSTor Vicifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
99224845dcbSNick DesaulniersKBUILD_LDFLAGS	+= -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN)
99324845dcbSNick Desaulniersendif
994dc5723b0SSami Tolvanenendif
9950236526dSTor Vicendif
996dc5723b0SSami Tolvanen
997dc5723b0SSami Tolvanenifdef CONFIG_LTO
9985e95325fSSami TolvanenKBUILD_CFLAGS	+= -fno-lto $(CC_FLAGS_LTO)
9995e95325fSSami TolvanenKBUILD_AFLAGS	+= -fno-lto
1000dc5723b0SSami Tolvanenexport CC_FLAGS_LTO
1001dc5723b0SSami Tolvanenendif
1002dc5723b0SSami Tolvanen
1003cf68fffbSSami Tolvanenifdef CONFIG_CFI_CLANG
1004cf68fffbSSami TolvanenCC_FLAGS_CFI	:= -fsanitize=cfi \
1005cf68fffbSSami Tolvanen		   -fsanitize-cfi-cross-dso \
1006cf68fffbSSami Tolvanen		   -fno-sanitize-cfi-canonical-jump-tables \
1007cf68fffbSSami Tolvanen		   -fno-sanitize-trap=cfi \
1008cf68fffbSSami Tolvanen		   -fno-sanitize-blacklist
1009cf68fffbSSami Tolvanen
1010cf68fffbSSami Tolvanenifdef CONFIG_CFI_PERMISSIVE
1011cf68fffbSSami TolvanenCC_FLAGS_CFI	+= -fsanitize-recover=cfi
1012cf68fffbSSami Tolvanenendif
1013cf68fffbSSami Tolvanen
1014cf68fffbSSami Tolvanen# If LTO flags are filtered out, we must also filter out CFI.
1015cf68fffbSSami TolvanenCC_FLAGS_LTO	+= $(CC_FLAGS_CFI)
1016cf68fffbSSami TolvanenKBUILD_CFLAGS	+= $(CC_FLAGS_CFI)
1017cf68fffbSSami Tolvanenexport CC_FLAGS_CFI
1018cf68fffbSSami Tolvanenendif
1019cf68fffbSSami Tolvanen
1020cf536e18SFeng Tangifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B
1021cf536e18SFeng TangKBUILD_CFLAGS += -falign-functions=64
102209c60546SFeng Tangendif
102309c60546SFeng Tang
1024e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
102504e85bbfSAlexey DobriyanNOSTDINC_FLAGS += -nostdinc
1026e8e69931SSam Ravnborg
10271da177e4SLinus Torvalds# warn about C99 declaration after statement
1028a33e7ae2SMasahiro YamadaKBUILD_CFLAGS += -Wdeclaration-after-statement
10291da177e4SLinus Torvalds
10300bb95f80SKees Cook# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
10318289f913SMasahiro YamadaKBUILD_CFLAGS += -Wvla
10320bb95f80SKees Cook
1033070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
1034fb073a4bSMasahiro YamadaKBUILD_CFLAGS += -Wno-pointer-sign
10351da177e4SLinus Torvalds
1036552a23a0SGustavo A. R. Silva# In order to make sure new function cast mismatches are not introduced
1037552a23a0SGustavo A. R. Silva# in the kernel (to avoid tripping CFI checking), the kernel should be
1038552a23a0SGustavo A. R. Silva# globally built with -Wcast-function-type.
1039552a23a0SGustavo A. R. SilvaKBUILD_CFLAGS += $(call cc-option, -Wcast-function-type)
1040552a23a0SGustavo A. R. Silva
1041217c3e01SStephen Rothwell# disable stringop warnings in gcc 8+
1042217c3e01SStephen RothwellKBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
1043217c3e01SStephen Rothwell
10445c45de21SLinus Torvalds# We'll want to enable this eventually, but it's not going away for 5.7 at least
10455a76021cSLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
10465c45de21SLinus Torvalds
1047adc71920SLinus Torvalds# Another good warning that we'll want to enable eventually
1048adc71920SLinus TorvaldsKBUILD_CFLAGS += $(call cc-disable-warning, restrict)
1049adc71920SLinus Torvalds
105078a5255fSLinus Torvalds# Enabled with W=2, disabled by default as noisy
10517d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
10527d73c3e9SNick DesaulniersKBUILD_CFLAGS += -Wno-maybe-uninitialized
10537d73c3e9SNick Desaulniersendif
105478a5255fSLinus Torvalds
105586cffecdSKees Cookifdef CONFIG_CC_IS_GCC
105686cffecdSKees Cook# The allocators already balk at large sizes, so silence the compiler
105786cffecdSKees Cook# warnings for bounds checks involving those possible values. While
105886cffecdSKees Cook# -Wno-alloc-size-larger-than would normally be used here, earlier versions
105986cffecdSKees Cook# of gcc (<9.1) weirdly don't handle the option correctly when _other_
106086cffecdSKees Cook# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX
106186cffecdSKees Cook# doesn't work (as it is documented to), silently resolving to "0" prior to
106286cffecdSKees Cook# version 9.1 (and producing an error more recently). Numeric values larger
106386cffecdSKees Cook# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently
106486cffecdSKees Cook# ignored, continuing to default to PTRDIFF_MAX. So, left with no other
106586cffecdSKees Cook# choice, we must perform a versioned check to disable this warning.
106686cffecdSKees Cook# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au
106786cffecdSKees CookKBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than)
106886cffecdSKees Cookendif
106986cffecdSKees Cook
1070fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
10718b42cf2fSMasahiro YamadaKBUILD_CFLAGS	+= -fno-strict-overflow
1072d0115552SLinus Torvalds
10733ce120b1SLinus Torvalds# Make sure -fstack-check isn't enabled (like gentoo apparently did)
10747d4eb0d8SMasahiro YamadaKBUILD_CFLAGS  += -fno-stack-check
10753ce120b1SLinus Torvalds
10768f7f5c9fSAndi Kleen# conserve stack if available
10777d73c3e9SNick Desaulniersifdef CONFIG_CC_IS_GCC
10787d73c3e9SNick DesaulniersKBUILD_CFLAGS   += -fconserve-stack
10797d73c3e9SNick Desaulniersendif
10808f7f5c9fSAndi Kleen
1081fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
108287de84c9SMasahiro YamadaKBUILD_CFLAGS   += -Werror=date-time
1083fe7c36c7SJosh Triplett
1084ea8daa7bSDaniel Wagner# enforce correct pointer usage
1085ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
1086ea8daa7bSDaniel Wagner
1087c834f0e8SKees Cook# Require designated initializers for all marked structures
1088c834f0e8SKees CookKBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
1089c834f0e8SKees Cook
1090a73619a8SMasahiro Yamada# change __FILE__ to the relative path from the srctree
1091a716bd74SDenys ZagoruiKBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
1092a73619a8SMasahiro Yamada
1093e0fe0bbeSMasahiro Yamada# include additional Makefiles when needed
1094e0fe0bbeSMasahiro Yamadainclude-y			:= scripts/Makefile.extrawarn
10956947fd96SMasahiro Yamadainclude-$(CONFIG_DEBUG_INFO)	+= scripts/Makefile.debug
1096e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KASAN)		+= scripts/Makefile.kasan
1097e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCSAN)		+= scripts/Makefile.kcsan
1098e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_UBSAN)		+= scripts/Makefile.ubsan
1099e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_KCOV)		+= scripts/Makefile.kcov
1100613f4b3eSKees Cookinclude-$(CONFIG_RANDSTRUCT)	+= scripts/Makefile.randstruct
1101e0fe0bbeSMasahiro Yamadainclude-$(CONFIG_GCC_PLUGINS)	+= scripts/Makefile.gcc-plugins
1102e0fe0bbeSMasahiro Yamada
1103e0fe0bbeSMasahiro Yamadainclude $(addprefix $(srctree)/, $(include-y))
1104a86fe353SMasahiro Yamada
1105132305b3SMasahiro Yamada# scripts/Makefile.gcc-plugins is intentionally included last.
1106132305b3SMasahiro Yamada# Do not add $(call cc-option,...) below this line. When you build the kernel
1107132305b3SMasahiro Yamada# from the clean source tree, the GCC plugins do not exist at this point.
1108bf5438fcSJason Baron
1109*2f7ab126SMiguel Ojeda# Add user supplied CPPFLAGS, AFLAGS, CFLAGS and RUSTFLAGS as the last assignments
11108cc7af75SMasahiro YamadaKBUILD_CPPFLAGS += $(KCPPFLAGS)
11118cc7af75SMasahiro YamadaKBUILD_AFLAGS   += $(KAFLAGS)
11128cc7af75SMasahiro YamadaKBUILD_CFLAGS   += $(KCFLAGS)
1113*2f7ab126SMiguel OjedaKBUILD_RUSTFLAGS += $(KRUSTFLAGS)
111452bcc330SSam Ravnborg
1115a9684337SBill WendlingKBUILD_LDFLAGS_MODULE += --build-id=sha1
1116a9684337SBill WendlingLDFLAGS_vmlinux += --build-id=sha1
111718991197SRoland McGrath
11180d362be5SNick DesaulniersKBUILD_LDFLAGS	+= -z noexecstack
11190d362be5SNick Desaulniersifeq ($(CONFIG_LD_IS_BFD),y)
11200d362be5SNick DesaulniersKBUILD_LDFLAGS	+= $(call ld-option,--no-warn-rwx-segments)
11210d362be5SNick Desaulniersendif
11220d362be5SNick Desaulniers
11235d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1124d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
11255d7d18f5SDavid Howellsendif
11265d7d18f5SDavid Howells
11275cf896fbSPeter Collingbourneifeq ($(CONFIG_RELR),y)
112827f2a4dbSNick DesaulniersLDFLAGS_vmlinux	+= --pack-dyn-relocs=relr --use-android-relr-tags
11295cf896fbSPeter Collingbourneendif
11305cf896fbSPeter Collingbourne
113159612b24SNathan Chancellor# We never want expected sections to be placed heuristically by the
113259612b24SNathan Chancellor# linker. All sections should be explicitly named in the linker script.
113359612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN
113459612b24SNathan ChancellorLDFLAGS_vmlinux += --orphan-handling=warn
113559612b24SNathan Chancellorendif
113659612b24SNathan Chancellor
11377f3a59dbSMasahiro Yamada# Align the bit size of userspace programs with the kernel
11387f58b487SMasahiro YamadaKBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
11397f58b487SMasahiro YamadaKBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
11407f3a59dbSMasahiro Yamada
114180591e61SLuc Van Oostenryck# make the checker run with the right architecture
114280591e61SLuc Van OostenryckCHECKFLAGS += --arch=$(ARCH)
114380591e61SLuc Van Oostenryck
114414516765SLuc Van Oostenryck# insure the checker run with the right endianness
114514516765SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
114614516765SLuc Van Oostenryck
11471f2f01b1SLuc Van Oostenryck# the checker needs the correct machine size
11481f2f01b1SLuc Van OostenryckCHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
11491f2f01b1SLuc Van Oostenryck
11501da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
11511da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
11521da177e4SLinus Torvalds# set in the environment
11531da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
11541da177e4SLinus Torvalds# this default value
11551da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
11561da177e4SLinus Torvalds
11571da177e4SLinus Torvalds#
11581da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
11591da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
11601da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
11611da177e4SLinus Torvalds
11621da177e4SLinus Torvalds#
1163f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1164f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1165f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
1166f4d4ffc0SJason Cooper#
1167f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1168f4d4ffc0SJason Cooper
1169f4d4ffc0SJason Cooper#
11701da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
11711da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
1172070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
11731da177e4SLinus Torvalds#
11741da177e4SLinus Torvalds
1175df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
11761da177e4SLinus Torvaldsexport MODLIB
11771da177e4SLinus Torvalds
1178e00d8880SMasahiro YamadaPHONY += prepare0
1179e2a666d5SRusty Russell
1180ccae4cfaSMasahiro Yamadaexport extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
11817f69180bSMasahiro Yamadaexport MODORDER := $(extmod_prefix)modules.order
11827f69180bSMasahiro Yamadaexport MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
118347801c97SMasahiro Yamada
11841da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
11854c928904SMasahiro Yamadacore-y			+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/
11864c928904SMasahiro Yamadacore-$(CONFIG_BLOCK)	+= block/
1187ed29b0b4SJens Axboecore-$(CONFIG_IO_URING)	+= io_uring/
1188*2f7ab126SMiguel Ojedacore-$(CONFIG_RUST)	+= rust/
11891da177e4SLinus Torvalds
119023febe37SMasahiro Yamadavmlinux-dirs	:= $(patsubst %/,%,$(filter %/, \
11911da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
119295fb6317SMasahiro Yamada		     $(libs-y) $(libs-m)))
11931da177e4SLinus Torvalds
11941eaca4b9SMasahiro Yamadavmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
119523febe37SMasahiro Yamada		     $(patsubst %/,%,$(filter %/, $(core-) \
119695fb6317SMasahiro Yamada			$(drivers-) $(libs-))))
11971da177e4SLinus Torvalds
1198c99f3918SMasahiro Yamadabuild-dirs	:= $(vmlinux-dirs)
119976cd306dSMasahiro Yamadaclean-dirs	:= $(vmlinux-alldirs)
1200c99f3918SMasahiro Yamada
120111314751SMasahiro Yamadasubdir-modorder := $(addsuffix /modules.order, $(build-dirs))
120211314751SMasahiro Yamada
12031f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
1204f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1205f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1206f0d50ca0SMasahiro Yamadaifdef CONFIG_MODULES
1207f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1208f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1209f0d50ca0SMasahiro Yamadaelse
1210f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1211f0d50ca0SMasahiro Yamadaendif
1212f0d50ca0SMasahiro YamadaKBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1213f0d50ca0SMasahiro Yamada
1214f0d50ca0SMasahiro Yamadaexport KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
121595698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
121685f0ae7eSMasahiro Yamada# used by scripts/Makefile.package
1217233c741dSMasahiro Yamadaexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
12181da177e4SLinus Torvalds
1219d151e971SMasahiro Yamadavmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
12201da177e4SLinus Torvalds
12213fdc7d3fSMasahiro Yamada# Recurse until adjust_autoksyms.sh is satisfied
12223fdc7d3fSMasahiro YamadaPHONY += autoksyms_recursive
12232441e78bSNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
12241f50b80aSMasahiro Yamada# For the kernel to actually contain only the needed exported symbols,
12251f50b80aSMasahiro Yamada# we have to build modules as well to determine what those symbols are.
12261f50b80aSMasahiro Yamada# (this can be evaluated only once include/config/auto.conf has been included)
12271f50b80aSMasahiro YamadaKBUILD_MODULES := 1
1228fb2d99beSMasahiro Yamada
1229fb2d99beSMasahiro Yamadaautoksyms_recursive: descend modules.order
1230fb2d99beSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
123153632ba8SMasahiro Yamada	  "$(MAKE) -f $(srctree)/Makefile autoksyms_recursive"
12321f50b80aSMasahiro Yamadaendif
12331f50b80aSMasahiro Yamada
123407a422bbSMasahiro Yamadaautoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
123507a422bbSMasahiro Yamada
123688694cffSQuentin Perretquiet_cmd_autoksyms_h = GEN     $@
123788694cffSQuentin Perret      cmd_autoksyms_h = mkdir -p $(dir $@); \
123888694cffSQuentin Perret			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
123988694cffSQuentin Perret
124007a422bbSMasahiro Yamada$(autoksyms_h):
124188694cffSQuentin Perret	$(call cmd,autoksyms_h)
124223121ca2SNicolas Pitre
1243fbe6e37dSNicholas PigginARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1244fbe6e37dSNicholas Piggin
1245fbe6e37dSNicholas Piggin# Final link of vmlinux with optional arch pass after final link
1246fbe6e37dSNicholas Piggincmd_link-vmlinux =                                                 \
12473ec8a5b3SMasahiro Yamada	$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";    \
1248fbe6e37dSNicholas Piggin	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
12492441e78bSNicolas Pitre
12503fdc7d3fSMasahiro Yamadavmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
12510b956e20SRasmus Villemoes	+$(call if_changed_dep,link-vmlinux)
1252741f98feSSam Ravnborg
1253392885eeSMasahiro Yamadatargets := vmlinux
1254392885eeSMasahiro Yamada
12551da177e4SLinus Torvalds# The actual objects are generated when descending,
12561da177e4SLinus Torvalds# make sure no implicit rule kicks in
1257b2c88554SMasahiro Yamada$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
12581da177e4SLinus Torvalds
1259ba97df45SMasahiro Yamadafilechk_kernel.release = \
12600d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
12610d0e7718SMichal Marek
126283a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
126324512795SMasahiro Yamadainclude/config/kernel.release: FORCE
12640d0e7718SMichal Marek	$(call filechk,kernel.release)
1265cb58455cSSam Ravnborg
1266d8821622SMasahiro Yamada# Additional helpers built in scripts/
1267d8821622SMasahiro Yamada# Carefully list dependencies so we do not try to build scripts twice
1268d8821622SMasahiro Yamada# in parallel
1269d8821622SMasahiro YamadaPHONY += scripts
127060df1aeeSMasahiro Yamadascripts: scripts_basic scripts_dtc
1271d8821622SMasahiro Yamada	$(Q)$(MAKE) $(build)=$(@)
1272cb58455cSSam Ravnborg
12731da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
12745bb78269SSam Ravnborg# or the modules are listed in "prepare".
12755bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
12765bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
12775bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
12781da177e4SLinus Torvalds
1279a5139fb3SMasahiro YamadaPHONY += prepare archprepare
12805bb78269SSam Ravnborg
128136de077bSMasahiro Yamadaarchprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
12823044dd05SMasahiro Yamada	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
12831476fee5SMasahiro Yamada	include/generated/autoconf.h remove-stale-files
12845bb78269SSam Ravnborg
128565bba042SMasahiro Yamadaprepare0: archprepare
128660df1aeeSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/mod
12878d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
128886feeaa8SSam Ravnborg
12891da177e4SLinus Torvalds# All the preparing..
12900d989ac2SMasahiro Yamadaprepare: prepare0
1291*2f7ab126SMiguel Ojedaifdef CONFIG_RUST
1292*2f7ab126SMiguel Ojeda	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v
1293*2f7ab126SMiguel Ojeda	$(Q)$(MAKE) $(build)=rust
1294*2f7ab126SMiguel Ojedaendif
1295b9ab5ebbSJosh Poimboeuf
12961476fee5SMasahiro YamadaPHONY += remove-stale-files
12971476fee5SMasahiro Yamadaremove-stale-files:
12981476fee5SMasahiro Yamada	$(Q)$(srctree)/scripts/remove-stale-files
12991476fee5SMasahiro Yamada
13002c1f4f12SMasahiro Yamada# Support for using generic headers in asm-generic
13017d0e5c20SMasahiro Yamadaasm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
13027d0e5c20SMasahiro Yamada
13032c1f4f12SMasahiro YamadaPHONY += asm-generic uapi-asm-generic
13042c1f4f12SMasahiro Yamadaasm-generic: uapi-asm-generic
1305037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1306037fc336SMasahiro Yamada	generic=include/asm-generic
13072c1f4f12SMasahiro Yamadauapi-asm-generic:
1308037fc336SMasahiro Yamada	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1309037fc336SMasahiro Yamada	generic=include/uapi/asm-generic
13102c1f4f12SMasahiro Yamada
13111da177e4SLinus Torvalds# Generate some files
13121da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13131da177e4SLinus Torvalds
13141da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
13151da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
13161da177e4SLinus Torvalds
13171da177e4SLinus Torvaldsuts_len := 64
131863104eecSSam Ravnborgdefine filechk_utsrelease.h
13191da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
13201da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
13211da177e4SLinus Torvalds	  exit 1;                                                         \
13221da177e4SLinus Torvalds	fi;                                                               \
1323ad774086SMasahiro Yamada	echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
13241da177e4SLinus Torvaldsendef
13251da177e4SLinus Torvalds
132663104eecSSam Ravnborgdefine filechk_version.h
13279b82f13eSSasha Levin	if [ $(SUBLEVEL) -gt 255 ]; then                                 \
1328ad774086SMasahiro Yamada		echo \#define LINUX_VERSION_CODE $(shell                 \
1329207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
13309b82f13eSSasha Levin	else                                                             \
13319b82f13eSSasha Levin		echo \#define LINUX_VERSION_CODE $(shell                 \
1332207da4c8SMasahiro Yamada		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
13339b82f13eSSasha Levin	fi;                                                              \
13349b82f13eSSasha Levin	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
133588a68672SSasha Levin	((c) > 255 ? 255 : (c)))';                                       \
133688a68672SSasha Levin	echo \#define LINUX_VERSION_MAJOR $(VERSION);                    \
133788a68672SSasha Levin	echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL);            \
133888a68672SSasha Levin	echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
133963104eecSSam Ravnborgendef
134063104eecSSam Ravnborg
13415c816641SMasahiro Yamada$(version_h): PATCHLEVEL := $(or $(PATCHLEVEL), 0)
13425c816641SMasahiro Yamada$(version_h): SUBLEVEL := $(or $(SUBLEVEL), 0)
134343fee2b2SMasahiro Yamada$(version_h): FORCE
13441da177e4SLinus Torvalds	$(call filechk,version.h)
13451da177e4SLinus Torvalds
1346273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
134763104eecSSam Ravnborg	$(call filechk,utsrelease.h)
134863104eecSSam Ravnborg
1349179efcb4SVegard NossumPHONY += headerdep
1350179efcb4SVegard Nossumheaderdep:
13519663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
13529663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1353179efcb4SVegard Nossum
13541da177e4SLinus Torvalds# ---------------------------------------------------------------------------
13558d730cfbSDavid Woodhouse# Kernel headers
13568d730cfbSDavid Woodhouse
1357e6883b18SSam Ravnborg#Default location for installed headers
1358e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1359e6883b18SSam Ravnborg
136059b2bd05SMasahiro Yamadaquiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
136159b2bd05SMasahiro Yamada      cmd_headers_install = \
136259b2bd05SMasahiro Yamada	mkdir -p $(INSTALL_HDR_PATH); \
136359b2bd05SMasahiro Yamada	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
136459b2bd05SMasahiro Yamada	usr/include $(INSTALL_HDR_PATH)
13656d716275SDavid Woodhouse
13668d730cfbSDavid WoodhousePHONY += headers_install
136759b2bd05SMasahiro Yamadaheaders_install: headers
136859b2bd05SMasahiro Yamada	$(call cmd,headers_install)
13694f193362SPaul Smith
13701da177e4SLinus TorvaldsPHONY += archheaders archscripts
13711da177e4SLinus Torvalds
1372a5bae54cSMasahiro Yamadahdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
13731da177e4SLinus Torvalds
137459b2bd05SMasahiro YamadaPHONY += headers
137559b2bd05SMasahiro Yamadaheaders: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
13761b620d53SMasahiro Yamada	$(if $(filter um, $(SRCARCH)), $(error Headers not exportable for UML))
1377d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1378d5470d14SMasahiro Yamada	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
13791f85712eSMike Frysinger
1380e949f4c2SMasahiro Yamadaifdef CONFIG_HEADERS_INSTALL
138159b2bd05SMasahiro Yamadaprepare: headers
1382e949f4c2SMasahiro Yamadaendif
138368475359SDavid Woodhouse
1384bdd7714bSMasahiro YamadaPHONY += scripts_unifdef
1385bdd7714bSMasahiro Yamadascripts_unifdef: scripts_basic
1386bdd7714bSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
1387bdd7714bSMasahiro Yamada
13888d730cfbSDavid Woodhouse# ---------------------------------------------------------------------------
138914ccc638SMasahiro Yamada# Install
139014ccc638SMasahiro Yamada
139114ccc638SMasahiro Yamada# Many distributions have the custom install script, /sbin/installkernel.
139275ef3122SRandy Dunlap# If DKMS is installed, 'make install' will eventually recurse back
139375ef3122SRandy Dunlap# to this Makefile to build and install external modules.
139414ccc638SMasahiro Yamada# Cancel sub_make_done so that options such as M=, V=, etc. are parsed.
139514ccc638SMasahiro Yamada
1396f774f5bbSMasahiro Yamadaquiet_cmd_install = INSTALL $(INSTALL_PATH)
1397f774f5bbSMasahiro Yamada      cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh
139814ccc638SMasahiro Yamada
139914ccc638SMasahiro Yamada# ---------------------------------------------------------------------------
14001bb0b18aSMasahiro Yamada# Tools
14011bb0b18aSMasahiro Yamada
140203f16cd0SJosh Poimboeufifdef CONFIG_OBJTOOL
14030d989ac2SMasahiro Yamadaprepare: tools/objtool
14040d989ac2SMasahiro Yamadaendif
14050d989ac2SMasahiro Yamada
14060d989ac2SMasahiro Yamadaifdef CONFIG_BPF
14070d989ac2SMasahiro Yamadaifdef CONFIG_DEBUG_INFO_BTF
14080d989ac2SMasahiro Yamadaprepare: tools/bpf/resolve_btfids
14090d989ac2SMasahiro Yamadaendif
14100d989ac2SMasahiro Yamadaendif
14110d989ac2SMasahiro Yamada
14120d989ac2SMasahiro YamadaPHONY += resolve_btfids_clean
14130d989ac2SMasahiro Yamada
14140d989ac2SMasahiro Yamadaresolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
14150d989ac2SMasahiro Yamada
14160d989ac2SMasahiro Yamada# tools/bpf/resolve_btfids directory might not exist
14170d989ac2SMasahiro Yamada# in output directory, skip its clean in that case
14180d989ac2SMasahiro Yamadaresolve_btfids_clean:
14190d989ac2SMasahiro Yamadaifneq ($(wildcard $(resolve_btfids_O)),)
14200d989ac2SMasahiro Yamada	$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
14210d989ac2SMasahiro Yamadaendif
14220d989ac2SMasahiro Yamada
14231bb0b18aSMasahiro Yamada# Clear a bunch of variables before executing the submake
14241bb0b18aSMasahiro Yamadaifeq ($(quiet),silent_)
14251bb0b18aSMasahiro Yamadatools_silent=s
14261bb0b18aSMasahiro Yamadaendif
14271bb0b18aSMasahiro Yamada
14281bb0b18aSMasahiro Yamadatools/: FORCE
14291bb0b18aSMasahiro Yamada	$(Q)mkdir -p $(objtree)/tools
14301bb0b18aSMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
14311bb0b18aSMasahiro Yamada
14321bb0b18aSMasahiro Yamadatools/%: FORCE
14331bb0b18aSMasahiro Yamada	$(Q)mkdir -p $(objtree)/tools
14341bb0b18aSMasahiro Yamada	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
14351bb0b18aSMasahiro Yamada
14361bb0b18aSMasahiro Yamada# ---------------------------------------------------------------------------
14375a5da78bSShuah Khan# Kernel selftest
14385a5da78bSShuah Khan
14395a5da78bSShuah KhanPHONY += kselftest
14404062eba9SGuillaume Tuckerkselftest: headers
14412bc84526SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
14425a5da78bSShuah Khan
14434062eba9SGuillaume Tuckerkselftest-%: headers FORCE
144417eac6c2SShuah Khan	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1445dcb825a9SWang Long
14463d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
14473d6dee7aSBamvor Jian Zhangkselftest-merge:
14483d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
14496d3db46cSDan Rue	$(Q)find $(srctree)/tools/testing/selftests -name config | \
14506d3db46cSDan Rue		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
14513e4c6948SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
14523d6dee7aSBamvor Jian Zhang
14535a5da78bSShuah Khan# ---------------------------------------------------------------------------
145437c8a5faSRob Herring# Devicetree files
145537c8a5faSRob Herring
145637c8a5faSRob Herringifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
145737c8a5faSRob Herringdtstree := arch/$(SRCARCH)/boot/dts
145837c8a5faSRob Herringendif
145937c8a5faSRob Herring
146037c8a5faSRob Herringifneq ($(dtstree),)
146137c8a5faSRob Herring
1462ee476203SMasahiro Yamada%.dtb: dtbs_prepare
146375e89534SRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
146437c8a5faSRob Herring
1465ee476203SMasahiro Yamada%.dtbo: dtbs_prepare
146675e89534SRob Herring	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1467ce88c9c7SViresh Kumar
1468ee476203SMasahiro YamadaPHONY += dtbs dtbs_prepare dtbs_install dtbs_check
1469ee476203SMasahiro Yamadadtbs: dtbs_prepare
147037c8a5faSRob Herring	$(Q)$(MAKE) $(build)=$(dtstree)
147137c8a5faSRob Herring
1472ee476203SMasahiro Yamada# include/config/kernel.release is actually needed when installing DTBs because
1473ee476203SMasahiro Yamada# INSTALL_DTBS_PATH contains $(KERNELRELEASE). However, we do not want to make
1474ee476203SMasahiro Yamada# dtbs_install depend on it as dtbs_install may run as root.
1475ee476203SMasahiro Yamadadtbs_prepare: include/config/kernel.release scripts_dtc
1476ee476203SMasahiro Yamada
147775e89534SRob Herringifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1478e10c4321SMasahiro Yamadaexport CHECK_DTBS=y
1479b5154bf6SMasahiro Yamadadtbs: dt_binding_check
1480b5154bf6SMasahiro Yamadaendif
1481b5154bf6SMasahiro Yamada
1482b5154bf6SMasahiro Yamadadtbs_check: dtbs
14834f0e3a57SRob Herring
148437c8a5faSRob Herringdtbs_install:
14852431f22aSMasahiro Yamada	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
148637c8a5faSRob Herring
148737c8a5faSRob Herringifdef CONFIG_OF_EARLY_FLATTREE
148837c8a5faSRob Herringall: dtbs
148937c8a5faSRob Herringendif
149037c8a5faSRob Herring
149137c8a5faSRob Herringendif
149237c8a5faSRob Herring
149337c8a5faSRob HerringPHONY += scripts_dtc
149437c8a5faSRob Herringscripts_dtc: scripts_basic
149537c8a5faSRob Herring	$(Q)$(MAKE) $(build)=scripts/dtc
149637c8a5faSRob Herring
1497e10c4321SMasahiro Yamadaifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1498e10c4321SMasahiro Yamadaexport CHECK_DT_BINDING=y
1499e10c4321SMasahiro Yamadaendif
1500e10c4321SMasahiro Yamada
1501c473a8d0SMasahiro YamadaPHONY += dt_binding_check
15024f0e3a57SRob Herringdt_binding_check: scripts_dtc
15034f0e3a57SRob Herring	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
15044f0e3a57SRob Herring
150537c8a5faSRob Herring# ---------------------------------------------------------------------------
15061da177e4SLinus Torvalds# Modules
15071da177e4SLinus Torvalds
15081da177e4SLinus Torvaldsifdef CONFIG_MODULES
15091da177e4SLinus Torvalds
15101da177e4SLinus Torvalds# By default, build modules as well
15111da177e4SLinus Torvalds
151273d1393eSMichal Marekall: modules
15131da177e4SLinus Torvalds
15144b50c8c4SMasahiro Yamada# When we're building modules with modversions, we need to consider
15154b50c8c4SMasahiro Yamada# the built-in objects during the descend as well, in order to
15164b50c8c4SMasahiro Yamada# make sure the checksums are up to date before we record them.
15174b50c8c4SMasahiro Yamadaifdef CONFIG_MODVERSIONS
15184b50c8c4SMasahiro Yamada  KBUILD_BUILTIN := 1
15194b50c8c4SMasahiro Yamadaendif
15204b50c8c4SMasahiro Yamada
15211da177e4SLinus Torvalds# Build modules
1522551559e1STejun Heo#
1523551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1524551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1525551559e1STejun Heo# using awk while concatenating to the final file.
15261da177e4SLinus Torvalds
15274f193362SPaul SmithPHONY += modules
1528596b0474SMasahiro Yamadamodules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
15291da177e4SLinus Torvalds
1530b2c88554SMasahiro Yamadacmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1531b2c88554SMasahiro Yamada
1532b2c88554SMasahiro Yamadamodules.order: $(subdir-modorder) FORCE
1533b2c88554SMasahiro Yamada	$(call if_changed,modules_order)
1534b2c88554SMasahiro Yamada
1535b2c88554SMasahiro Yamadatargets += modules.order
1536a6c36632SMichal Marek
15371da177e4SLinus Torvalds# Target to prepare building external modules
15384f193362SPaul SmithPHONY += modules_prepare
1539059bc9fcSMasahiro Yamadamodules_prepare: prepare
1540596b0474SMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts scripts/module.lds
15411da177e4SLinus Torvalds
1542961ab4a3SMasahiro Yamadaexport modules_sign_only :=
15431da177e4SLinus Torvalds
1544961ab4a3SMasahiro Yamadaifeq ($(CONFIG_MODULE_SIG),y)
1545961ab4a3SMasahiro YamadaPHONY += modules_sign
1546961ab4a3SMasahiro Yamadamodules_sign: modules_install
1547961ab4a3SMasahiro Yamada	@:
1548961ab4a3SMasahiro Yamada
1549961ab4a3SMasahiro Yamada# modules_sign is a subset of modules_install.
1550961ab4a3SMasahiro Yamada# 'make modules_install modules_sign' is equivalent to 'make modules_install'.
1551961ab4a3SMasahiro Yamadaifeq ($(filter modules_install,$(MAKECMDGOALS)),)
1552961ab4a3SMasahiro Yamadamodules_sign_only := y
1553961ab4a3SMasahiro Yamadaendif
1554961ab4a3SMasahiro Yamadaendif
1555961ab4a3SMasahiro Yamada
1556961ab4a3SMasahiro Yamadamodinst_pre :=
1557961ab4a3SMasahiro Yamadaifneq ($(filter modules_install,$(MAKECMDGOALS)),)
1558961ab4a3SMasahiro Yamadamodinst_pre := __modinst_pre
1559961ab4a3SMasahiro Yamadaendif
1560961ab4a3SMasahiro Yamada
1561961ab4a3SMasahiro Yamadamodules_install: $(modinst_pre)
15623e3005dfSMasahiro YamadaPHONY += __modinst_pre
15633e3005dfSMasahiro Yamada__modinst_pre:
15641da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
15651da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
15661da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
15678e9b4667SMasahiro Yamada	@ln -s $(abspath $(srctree)) $(MODLIB)/source
15681da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
15691da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
15707e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
15711da177e4SLinus Torvalds	fi
15721bd9a468SMasahiro Yamada	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
15732c6d9636SMasahiro Yamada	@cp -f modules.builtin $(MODLIB)/
15742c6d9636SMasahiro Yamada	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
15751da177e4SLinus Torvalds
15761da177e4SLinus Torvaldsendif # CONFIG_MODULES
15771da177e4SLinus Torvalds
15781da177e4SLinus Torvalds###
15791da177e4SLinus Torvalds# Cleaning is done on three levels.
15801da177e4SLinus Torvalds# make clean     Delete most generated files
15811da177e4SLinus Torvalds#                Leave enough to build external modules
15821da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
15831da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
15841da177e4SLinus Torvalds
15851da177e4SLinus Torvalds# Directories & files removed with 'make clean'
158669bc8d38SMasahiro YamadaCLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
15873d32285fSMasahiro Yamada	       modules.builtin modules.builtin.modinfo modules.nsdeps \
1588*2f7ab126SMiguel Ojeda	       compile_commands.json .thinlto-cache rust/test rust/doc
15891da177e4SLinus Torvalds
15901da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
15910663c68cSMasahiro YamadaMRPROPER_FILES += include/config include/generated          \
1592b0d6207bSMasahiro Yamada		  arch/$(SRCARCH)/include/generated .objdiff \
15930663c68cSMasahiro Yamada		  debian snap tar-install \
15940663c68cSMasahiro Yamada		  .config .config.old .version \
159546457133SMasahiro Yamada		  Module.symvers \
15965cca3606SMasahiro Yamada		  certs/signing_key.pem \
1597b31f2a49SNayna Jain		  certs/x509.genkey \
1598b31f2a49SNayna Jain		  vmlinux-gdb.py \
1599*2f7ab126SMiguel Ojeda		  *.spec \
1600*2f7ab126SMiguel Ojeda		  rust/target.json rust/libmacros.so
16011da177e4SLinus Torvalds
16021da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
16031da177e4SLinus Torvalds#
16041da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
16051da177e4SLinus Torvalds
160676cd306dSMasahiro YamadaPHONY += archclean vmlinuxclean
16071da177e4SLinus Torvalds
1608bd1ee804SPawel Mollvmlinuxclean:
1609bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1610fbe6e37dSNicholas Piggin	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1611bd1ee804SPawel Moll
161250d3a3f8SJiri Olsaclean: archclean vmlinuxclean resolve_btfids_clean
16131da177e4SLinus Torvalds
16141da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
16151da177e4SLinus Torvalds#
16161da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1617cb43fb57SMauro Carvalho Chehabmrproper-dirs      := $(addprefix _mrproper_,scripts)
16181da177e4SLinus Torvalds
1619b421b8a6SMasahiro YamadaPHONY += $(mrproper-dirs) mrproper
16201da177e4SLinus Torvalds$(mrproper-dirs):
16211da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
16221da177e4SLinus Torvalds
1623b421b8a6SMasahiro Yamadamrproper: clean $(mrproper-dirs)
16241da177e4SLinus Torvalds	$(call cmd,rmfiles)
1625*2f7ab126SMiguel Ojeda	@find . $(RCS_FIND_IGNORE) \
1626*2f7ab126SMiguel Ojeda		\( -name '*.rmeta' \) \
1627*2f7ab126SMiguel Ojeda		-type f -print | xargs rm -f
16281da177e4SLinus Torvalds
16291da177e4SLinus Torvalds# distclean
16301da177e4SLinus Torvalds#
16314f193362SPaul SmithPHONY += distclean
16321da177e4SLinus Torvalds
16331da177e4SLinus Torvaldsdistclean: mrproper
163419c8d912SMasahiro Yamada	@find . $(RCS_FIND_IGNORE) \
16351da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1636f78271dfSMasahiro Yamada		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
16377a02cec5SMasahiro Yamada		-o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \
16387a02cec5SMasahiro Yamada		-o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \
16391da177e4SLinus Torvalds		-type f -print | xargs rm -f
16401da177e4SLinus Torvalds
16411da177e4SLinus Torvalds
16421da177e4SLinus Torvalds# Packaging of the kernel to various formats
16431da177e4SLinus Torvalds# ---------------------------------------------------------------------------
16441da177e4SLinus Torvalds
1645bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1646000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1647031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1648000ec95fSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
16491da177e4SLinus Torvalds
16501da177e4SLinus Torvalds# Brief documentation of the typical targets used
16511da177e4SLinus Torvalds# ---------------------------------------------------------------------------
16521da177e4SLinus Torvalds
16535dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1654a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
16555dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
16565dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
16571da177e4SLinus Torvalds
1658fe69b420SMasahiro YamadaPHONY += help
16591da177e4SLinus Torvaldshelp:
16601da177e4SLinus Torvalds	@echo  'Cleaning targets:'
16615ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
16625cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
16635ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
16645cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
16651da177e4SLinus Torvalds	@echo  ''
16661da177e4SLinus Torvalds	@echo  'Configuration targets:'
16671da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
16681da177e4SLinus Torvalds	@echo  ''
16691da177e4SLinus Torvalds	@echo  'Other generic targets:'
16701da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
16711da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
16721da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
16739cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
16741da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
167540ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1676433db3e2SVinícius Tinti	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1677433db3e2SVinícius Tinti	@echo  '                    (requires compiler support for LLVM assembly generation)'
167862718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
167962718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1680155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1681c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
16821da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
16831da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1684f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
16853f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
16863f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
16873f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
16882fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
168959df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
16902fb9b1bdSSam Ravnborg	 echo  ''
169131b8cc80SRandy Dunlap	@echo  'Static analysers:'
16921da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1693aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1694ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1695295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
169674425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
16977f855fc8SMasahiro Yamada	@echo  '  coccicheck      - Check with Coccinelle'
16986ad7cbc0SNathan Huckleberry	@echo  '  clang-analyzer  - Check with clang static analyzer'
16996ad7cbc0SNathan Huckleberry	@echo  '  clang-tidy      - Check with clang-tidy'
170074425eeeSNicolas Palix	@echo  ''
1701eb8305aeSMatthias Maennich	@echo  'Tools:'
1702eb8305aeSMatthias Maennich	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
1703eb8305aeSMatthias Maennich	@echo  ''
170431b8cc80SRandy Dunlap	@echo  'Kernel selftest:'
1705e51d8dacSShuah Khan	@echo  '  kselftest         - Build and run kernel selftest'
17065a5da78bSShuah Khan	@echo  '                      Build, install, and boot kernel before'
17075a5da78bSShuah Khan	@echo  '                      running kselftest on it'
1708e51d8dacSShuah Khan	@echo  '                      Run as root for full coverage'
1709e51d8dacSShuah Khan	@echo  '  kselftest-all     - Build kernel selftest'
1710e51d8dacSShuah Khan	@echo  '  kselftest-install - Build and install kernel selftest'
1711dcb825a9SWang Long	@echo  '  kselftest-clean   - Remove all generated kselftest files'
1712e51d8dacSShuah Khan	@echo  '  kselftest-merge   - Merge all the config dependencies of'
1713e51d8dacSShuah Khan	@echo  '		      kselftest to existing .config.'
17145a5da78bSShuah Khan	@echo  ''
1715*2f7ab126SMiguel Ojeda	@echo  'Rust targets:'
1716*2f7ab126SMiguel Ojeda	@echo  '  rustavailable   - Checks whether the Rust toolchain is'
1717*2f7ab126SMiguel Ojeda	@echo  '		    available and, if not, explains why.'
1718*2f7ab126SMiguel Ojeda	@echo  '  rustfmt	  - Reformat all the Rust code in the kernel'
1719*2f7ab126SMiguel Ojeda	@echo  '  rustfmtcheck	  - Checks if all the Rust code in the kernel'
1720*2f7ab126SMiguel Ojeda	@echo  '		    is formatted, printing a diff otherwise.'
1721*2f7ab126SMiguel Ojeda	@echo  '  rustdoc	  - Generate Rust documentation'
1722*2f7ab126SMiguel Ojeda	@echo  '		    (requires kernel .config)'
1723*2f7ab126SMiguel Ojeda	@echo  '  rusttest        - Runs the Rust tests'
1724*2f7ab126SMiguel Ojeda	@echo  '                    (requires kernel .config; downloads external repos)'
1725*2f7ab126SMiguel Ojeda	@echo  '  rust-analyzer	  - Generate rust-project.json rust-analyzer support file'
1726*2f7ab126SMiguel Ojeda	@echo  '		    (requires kernel .config)'
1727*2f7ab126SMiguel Ojeda	@echo  '  dir/file.[os]   - Build specified target only'
1728*2f7ab126SMiguel Ojeda	@echo  '  dir/file.rsi    - Build macro expanded source, similar to C preprocessing.'
1729*2f7ab126SMiguel Ojeda	@echo  '                    Run with RUSTFMT=n to skip reformatting if needed.'
1730*2f7ab126SMiguel Ojeda	@echo  '                    The output is not intended to be compilable.'
1731*2f7ab126SMiguel Ojeda	@echo  '  dir/file.ll     - Build the LLVM assembly file'
1732*2f7ab126SMiguel Ojeda	@echo  ''
173337c8a5faSRob Herring	@$(if $(dtstree), \
173437c8a5faSRob Herring		echo 'Devicetree:'; \
173537c8a5faSRob Herring		echo '* dtbs             - Build device tree blobs for enabled boards'; \
173637c8a5faSRob Herring		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
17377aa8dd91SStephen Boyd		echo '  dt_binding_check - Validate device tree binding documents'; \
17387aa8dd91SStephen Boyd		echo '  dtbs_check       - Validate device tree source files';\
173937c8a5faSRob Herring		echo '')
174037c8a5faSRob Herring
174131b8cc80SRandy Dunlap	@echo 'Userspace tools targets:'
174231b8cc80SRandy Dunlap	@echo '  use "make tools/help"'
174331b8cc80SRandy Dunlap	@echo '  or  "cd tools; make help"'
174431b8cc80SRandy Dunlap	@echo  ''
17451da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1746000ec95fSMasahiro Yamada	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
17471da177e4SLinus Torvalds	@echo  ''
17481da177e4SLinus Torvalds	@echo  'Documentation targets:'
1749cb43fb57SMauro Carvalho Chehab	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
17501da177e4SLinus Torvalds	@echo  ''
175101dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
17525c816641SMasahiro Yamada	@$(or $(archhelp),\
175301dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
17541da177e4SLinus Torvalds	@echo  ''
17551da177e4SLinus Torvalds	@$(if $(boards), \
17561da177e4SLinus Torvalds		$(foreach b, $(boards), \
17574234448bSGeert Uytterhoeven		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
17581da177e4SLinus Torvalds		echo '')
17595dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
17605dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
17615dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
17625dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
17635dffbe81SSegher Boessenkool		echo '')
17641da177e4SLinus Torvalds
17651da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
176645d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
17671da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1768a64c0440SGeert Uytterhoeven	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
1769a64c0440SGeert Uytterhoeven	@echo  '                       (sparse by default)'
1770701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1771af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1772e27128dbSMasahiro Yamada	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
177328bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
177428bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
177528bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1776c77d06e7SYann Droneaud	@echo  '		e: warnings are being treated as errors'
1777a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
17781da177e4SLinus Torvalds	@echo  ''
17791da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
17801da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
17811da177e4SLinus Torvalds
17821da177e4SLinus Torvalds
17835dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
17845dffbe81SSegher Boessenkool
17855dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
17865dffbe81SSegher Boessenkool
1787fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
17885dffbe81SSegher Boessenkool
17895dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
17905dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
17915dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
17925dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
17935dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
17945dffbe81SSegher Boessenkool		echo '')
17955dffbe81SSegher Boessenkool
17965dffbe81SSegher Boessenkool
17971da177e4SLinus Torvalds# Documentation targets
17981da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1799e8939222SJani NikulaDOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1800e8939222SJani Nikula	       linkcheckdocs dochelp refcheckdocs
180122cba31bSJani NikulaPHONY += $(DOC_TARGETS)
1802bc7b752aSMasahiro Yamada$(DOC_TARGETS):
1803cb43fb57SMauro Carvalho Chehab	$(Q)$(MAKE) $(build)=Documentation $@
18041da177e4SLinus Torvalds
1805*2f7ab126SMiguel Ojeda
1806*2f7ab126SMiguel Ojeda# Rust targets
1807*2f7ab126SMiguel Ojeda# ---------------------------------------------------------------------------
1808*2f7ab126SMiguel Ojeda
1809*2f7ab126SMiguel Ojeda# "Is Rust available?" target
1810*2f7ab126SMiguel OjedaPHONY += rustavailable
1811*2f7ab126SMiguel Ojedarustavailable:
1812*2f7ab126SMiguel Ojeda	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/rust_is_available.sh -v && echo "Rust is available!"
1813*2f7ab126SMiguel Ojeda
1814*2f7ab126SMiguel Ojeda# Documentation target
1815*2f7ab126SMiguel Ojeda#
1816*2f7ab126SMiguel Ojeda# Using the singular to avoid running afoul of `no-dot-config-targets`.
1817*2f7ab126SMiguel OjedaPHONY += rustdoc
1818*2f7ab126SMiguel Ojedarustdoc: prepare
1819*2f7ab126SMiguel Ojeda	$(Q)$(MAKE) $(build)=rust $@
1820*2f7ab126SMiguel Ojeda
1821*2f7ab126SMiguel Ojeda# Testing target
1822*2f7ab126SMiguel OjedaPHONY += rusttest
1823*2f7ab126SMiguel Ojedarusttest: prepare
1824*2f7ab126SMiguel Ojeda	$(Q)$(MAKE) $(build)=rust $@
1825*2f7ab126SMiguel Ojeda
1826*2f7ab126SMiguel Ojeda# Formatting targets
1827*2f7ab126SMiguel OjedaPHONY += rustfmt rustfmtcheck
1828*2f7ab126SMiguel Ojeda
1829*2f7ab126SMiguel Ojeda# We skip `rust/alloc` since we want to minimize the diff w.r.t. upstream.
1830*2f7ab126SMiguel Ojeda#
1831*2f7ab126SMiguel Ojeda# We match using absolute paths since `find` does not resolve them
1832*2f7ab126SMiguel Ojeda# when matching, which is a problem when e.g. `srctree` is `..`.
1833*2f7ab126SMiguel Ojeda# We `grep` afterwards in order to remove the directory entry itself.
1834*2f7ab126SMiguel Ojedarustfmt:
1835*2f7ab126SMiguel Ojeda	$(Q)find $(abs_srctree) -type f -name '*.rs' \
1836*2f7ab126SMiguel Ojeda		-o -path $(abs_srctree)/rust/alloc -prune \
1837*2f7ab126SMiguel Ojeda		-o -path $(abs_objtree)/rust/test -prune \
1838*2f7ab126SMiguel Ojeda		| grep -Fv $(abs_srctree)/rust/alloc \
1839*2f7ab126SMiguel Ojeda		| grep -Fv $(abs_objtree)/rust/test \
1840*2f7ab126SMiguel Ojeda		| grep -Fv generated \
1841*2f7ab126SMiguel Ojeda		| xargs $(RUSTFMT) $(rustfmt_flags)
1842*2f7ab126SMiguel Ojeda
1843*2f7ab126SMiguel Ojedarustfmtcheck: rustfmt_flags = --check
1844*2f7ab126SMiguel Ojedarustfmtcheck: rustfmt
1845*2f7ab126SMiguel Ojeda
1846*2f7ab126SMiguel Ojeda# IDE support targets
1847*2f7ab126SMiguel OjedaPHONY += rust-analyzer
1848*2f7ab126SMiguel Ojedarust-analyzer:
1849*2f7ab126SMiguel Ojeda	$(Q)$(MAKE) $(build)=rust $@
1850*2f7ab126SMiguel Ojeda
185167274c08SMasahiro Yamada# Misc
185267274c08SMasahiro Yamada# ---------------------------------------------------------------------------
185367274c08SMasahiro Yamada
185467274c08SMasahiro YamadaPHONY += scripts_gdb
18557a739ce5SMasahiro Yamadascripts_gdb: prepare0
18561e5ff84fSMasahiro Yamada	$(Q)$(MAKE) $(build)=scripts/gdb
18578d2e5200SMasahiro Yamada	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
185867274c08SMasahiro Yamada
185967274c08SMasahiro Yamadaifdef CONFIG_GDB_SCRIPTS
186067274c08SMasahiro Yamadaall: scripts_gdb
186167274c08SMasahiro Yamadaendif
186267274c08SMasahiro Yamada
18631da177e4SLinus Torvaldselse # KBUILD_EXTMOD
18641da177e4SLinus Torvalds
18651da177e4SLinus Torvalds###
18661da177e4SLinus Torvalds# External module support.
18671da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
18681da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
18691da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
187011122b86SMasahiro Yamada# in the basis kernel ordinary make commands (without M=...) must be used.
18711da177e4SLinus Torvalds
18726212804fSMasahiro Yamada# We are always building only modules.
18736212804fSMasahiro YamadaKBUILD_BUILTIN :=
18741da177e4SLinus TorvaldsKBUILD_MODULES := 1
18751da177e4SLinus Torvalds
1876c99f3918SMasahiro Yamadabuild-dirs := $(KBUILD_EXTMOD)
18773d32285fSMasahiro Yamada$(MODORDER): descend
18783d32285fSMasahiro Yamada	@:
18793d32285fSMasahiro Yamada
18807f69180bSMasahiro Yamadacompile_commands.json: $(extmod_prefix)compile_commands.json
18813d32285fSMasahiro YamadaPHONY += compile_commands.json
18823d32285fSMasahiro Yamada
188376cd306dSMasahiro Yamadaclean-dirs := $(KBUILD_EXTMOD)
18843d32285fSMasahiro Yamadaclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1885dc5723b0SSami Tolvanen	$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
18861da177e4SLinus Torvalds
18876072b2c4SMasahiro YamadaPHONY += prepare
18886072b2c4SMasahiro Yamada# now expand this into a simple variable to reduce the cost of shell evaluations
18896072b2c4SMasahiro Yamadaprepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
18906072b2c4SMasahiro Yamadaprepare:
1891129ab0d2SMasahiro Yamada	@if [ "$(CC_VERSION_TEXT)" != "$(CONFIG_CC_VERSION_TEXT)" ]; then \
18926072b2c4SMasahiro Yamada		echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
1893129ab0d2SMasahiro Yamada		echo >&2 "  The kernel was built by: $(CONFIG_CC_VERSION_TEXT)"; \
18946072b2c4SMasahiro Yamada		echo >&2 "  You are using:           $(CC_VERSION_TEXT)"; \
18956072b2c4SMasahiro Yamada	fi
18966072b2c4SMasahiro Yamada
1897fe69b420SMasahiro YamadaPHONY += help
18981da177e4SLinus Torvaldshelp:
18991da177e4SLinus Torvalds	@echo  '  Building external modules.'
19001da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
19011da177e4SLinus Torvalds	@echo  ''
19021da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
19031da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
19041da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
19051da177e4SLinus Torvalds	@echo  ''
190606300b21SSam Ravnborg
1907596b0474SMasahiro Yamada# no-op for external module builds
19086072b2c4SMasahiro YamadaPHONY += modules_prepare
1909596b0474SMasahiro Yamada
19101da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
19111da177e4SLinus Torvalds
19123e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
19133e3005dfSMasahiro Yamada# Modules
19143e3005dfSMasahiro Yamada
19153e3005dfSMasahiro YamadaPHONY += modules modules_install
19163e3005dfSMasahiro Yamada
19173e3005dfSMasahiro Yamadaifdef CONFIG_MODULES
19183e3005dfSMasahiro Yamada
19191a998be6SMasahiro Yamadamodules: modules_check
19203e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
19213e3005dfSMasahiro Yamada
19221a998be6SMasahiro YamadaPHONY += modules_check
19231a998be6SMasahiro Yamadamodules_check: $(MODORDER)
19241a998be6SMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
19251a998be6SMasahiro Yamada
19263ac42b21SMasahiro Yamadaquiet_cmd_depmod = DEPMOD  $(MODLIB)
19273e3005dfSMasahiro Yamada      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
19283e3005dfSMasahiro Yamada                   $(KERNELRELEASE)
19293e3005dfSMasahiro Yamada
19303e3005dfSMasahiro Yamadamodules_install:
19313e3005dfSMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
19323e3005dfSMasahiro Yamada	$(call cmd,depmod)
19333e3005dfSMasahiro Yamada
19343e3005dfSMasahiro Yamadaelse # CONFIG_MODULES
19353e3005dfSMasahiro Yamada
19363e3005dfSMasahiro Yamada# Modules not configured
19373e3005dfSMasahiro Yamada# ---------------------------------------------------------------------------
19383e3005dfSMasahiro Yamada
19393e3005dfSMasahiro Yamadamodules modules_install:
19403e3005dfSMasahiro Yamada	@echo >&2 '***'
19413e3005dfSMasahiro Yamada	@echo >&2 '*** The present kernel configuration has modules disabled.'
19423e3005dfSMasahiro Yamada	@echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
19433e3005dfSMasahiro Yamada	@echo >&2 '*** to enable CONFIG_MODULES.'
19443e3005dfSMasahiro Yamada	@echo >&2 '***'
19453e3005dfSMasahiro Yamada	@exit 1
19463e3005dfSMasahiro Yamada
19473e3005dfSMasahiro Yamadaendif # CONFIG_MODULES
19483e3005dfSMasahiro Yamada
1949b1fbfcb4SMasahiro Yamada# Single targets
1950b1fbfcb4SMasahiro Yamada# ---------------------------------------------------------------------------
1951b1fbfcb4SMasahiro Yamada# To build individual files in subdirectories, you can do like this:
1952b1fbfcb4SMasahiro Yamada#
1953b1fbfcb4SMasahiro Yamada#   make foo/bar/baz.s
1954b1fbfcb4SMasahiro Yamada#
1955b1fbfcb4SMasahiro Yamada# The supported suffixes for single-target are listed in 'single-targets'
1956b1fbfcb4SMasahiro Yamada#
1957b1fbfcb4SMasahiro Yamada# To build only under specific subdirectories, you can do like this:
1958b1fbfcb4SMasahiro Yamada#
1959b1fbfcb4SMasahiro Yamada#   make foo/bar/baz/
1960b1fbfcb4SMasahiro Yamada
1961b1fbfcb4SMasahiro Yamadaifdef single-build
1962b1fbfcb4SMasahiro Yamada
1963b1fbfcb4SMasahiro Yamada# .ko is special because modpost is needed
1964b1fbfcb4SMasahiro Yamadasingle-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1965fc93a4cdSMasahiro Yamadasingle-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \
1966fc93a4cdSMasahiro Yamada		$(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko)))
1967b1fbfcb4SMasahiro Yamada
1968b1fbfcb4SMasahiro Yamada$(single-ko): single_modpost
1969b1fbfcb4SMasahiro Yamada	@:
1970b1fbfcb4SMasahiro Yamada$(single-no-ko): descend
1971b1fbfcb4SMasahiro Yamada	@:
1972b1fbfcb4SMasahiro Yamada
1973b1fbfcb4SMasahiro Yamadaifeq ($(KBUILD_EXTMOD),)
1974b1fbfcb4SMasahiro Yamada# For the single build of in-tree modules, use a temporary file to avoid
1975b1fbfcb4SMasahiro Yamada# the situation of modules_install installing an invalid modules.order.
1976b1fbfcb4SMasahiro YamadaMODORDER := .modules.tmp
1977b1fbfcb4SMasahiro Yamadaendif
1978b1fbfcb4SMasahiro Yamada
1979b1fbfcb4SMasahiro YamadaPHONY += single_modpost
1980596b0474SMasahiro Yamadasingle_modpost: $(single-no-ko) modules_prepare
19817f69180bSMasahiro Yamada	$(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
1982b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1983b1fbfcb4SMasahiro Yamada
1984b1fbfcb4SMasahiro YamadaKBUILD_MODULES := 1
1985b1fbfcb4SMasahiro Yamada
19867f69180bSMasahiro Yamadaexport KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
1987b1fbfcb4SMasahiro Yamada
1988b1fbfcb4SMasahiro Yamada# trim unrelated directories
1989b1fbfcb4SMasahiro Yamadabuild-dirs := $(foreach d, $(build-dirs), \
1990b1fbfcb4SMasahiro Yamada			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1991b1fbfcb4SMasahiro Yamada
1992b1fbfcb4SMasahiro Yamadaendif
1993b1fbfcb4SMasahiro Yamada
1994b480fec9SMasahiro Yamadaifndef CONFIG_MODULES
1995b480fec9SMasahiro YamadaKBUILD_MODULES :=
1996b480fec9SMasahiro Yamadaendif
1997b480fec9SMasahiro Yamada
1998c99f3918SMasahiro Yamada# Handle descending into subdirectories listed in $(build-dirs)
1999c99f3918SMasahiro Yamada# Preset locale variables to speed up the build process. Limit locale
2000c99f3918SMasahiro Yamada# tweaks to this spot to avoid wrong language settings when running
2001c99f3918SMasahiro Yamada# make menuconfig etc.
2002c99f3918SMasahiro Yamada# Error messages still appears in the original language
2003c99f3918SMasahiro YamadaPHONY += descend $(build-dirs)
2004c99f3918SMasahiro Yamadadescend: $(build-dirs)
2005c99f3918SMasahiro Yamada$(build-dirs): prepare
2006b1fbfcb4SMasahiro Yamada	$(Q)$(MAKE) $(build)=$@ \
200720b1be59SMasahiro Yamada	single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
2008b1fbfcb4SMasahiro Yamada	need-builtin=1 need-modorder=1
2009c99f3918SMasahiro Yamada
201076cd306dSMasahiro Yamadaclean-dirs := $(addprefix _clean_, $(clean-dirs))
201176cd306dSMasahiro YamadaPHONY += $(clean-dirs) clean
201276cd306dSMasahiro Yamada$(clean-dirs):
201376cd306dSMasahiro Yamada	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
201476cd306dSMasahiro Yamada
201588d7be03SMichal Marekclean: $(clean-dirs)
201688d7be03SMichal Marek	$(call cmd,rmfiles)
20175c816641SMasahiro Yamada	@find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
2018*2f7ab126SMiguel Ojeda		\( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \
20194f0e3a57SRob Herring		-o -name '*.ko.*' \
2020ce88c9c7SViresh Kumar		-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
2021ef46d9b3SMasahiro Yamada		-o -name '*.dwo' -o -name '*.lst' \
20229413e764SMasahiro Yamada		-o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \
202388d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
20249a8dfb39SMasahiro Yamada		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
20254fa8bc94SMasahiro Yamada		-o -name '*.asn1.[ch]' \
202688d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
2027b0d6207bSMasahiro Yamada		-o -name '.tmp_*' \
20286b90bd4bSEmese Revfy		-o -name '*.c.[012]*.*' \
2029433db3e2SVinícius Tinti		-o -name '*.ll' \
203038e89184SSami Tolvanen		-o -name '*.gcno' \
203138e89184SSami Tolvanen		-o -name '*.*.symversions' \) -type f -print | xargs rm -f
203288d7be03SMichal Marek
20331da177e4SLinus Torvalds# Generate tags for editors
20341da177e4SLinus Torvalds# ---------------------------------------------------------------------------
2035a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
2036858805b3SMasahiro Yamada      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
20371da177e4SLinus Torvalds
2038f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
20391da177e4SLinus Torvalds	$(call cmd,tags)
20401da177e4SLinus Torvalds
2041eb8305aeSMatthias Maennich# Script to generate missing namespace dependencies
2042eb8305aeSMatthias Maennich# ---------------------------------------------------------------------------
2043eb8305aeSMatthias Maennich
2044eb8305aeSMatthias MaennichPHONY += nsdeps
2045bff9c62bSMasahiro Yamadansdeps: export KBUILD_NSDEPS=1
2046eb8305aeSMatthias Maennichnsdeps: modules
2047bff9c62bSMasahiro Yamada	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
2048eb8305aeSMatthias Maennich
20493d32285fSMasahiro Yamada# Clang Tooling
20503d32285fSMasahiro Yamada# ---------------------------------------------------------------------------
20513d32285fSMasahiro Yamada
20523d32285fSMasahiro Yamadaquiet_cmd_gen_compile_commands = GEN     $@
20533d32285fSMasahiro Yamada      cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
20543d32285fSMasahiro Yamada
20557f69180bSMasahiro Yamada$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
20563d32285fSMasahiro Yamada	$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
20573d32285fSMasahiro Yamada	$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
20583d32285fSMasahiro Yamada	$(call if_changed,gen_compile_commands)
20593d32285fSMasahiro Yamada
20607f69180bSMasahiro Yamadatargets += $(extmod_prefix)compile_commands.json
20613d32285fSMasahiro Yamada
20626ad7cbc0SNathan HuckleberryPHONY += clang-tidy clang-analyzer
20636ad7cbc0SNathan Huckleberry
20646ad7cbc0SNathan Huckleberryifdef CONFIG_CC_IS_CLANG
20656ad7cbc0SNathan Huckleberryquiet_cmd_clang_tools = CHECK   $<
20666ad7cbc0SNathan Huckleberry      cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
20676ad7cbc0SNathan Huckleberry
20687f69180bSMasahiro Yamadaclang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
20696ad7cbc0SNathan Huckleberry	$(call cmd,clang_tools)
20706ad7cbc0SNathan Huckleberryelse
20716ad7cbc0SNathan Huckleberryclang-tidy clang-analyzer:
20726ad7cbc0SNathan Huckleberry	@echo "$@ requires CC=clang" >&2
20736ad7cbc0SNathan Huckleberry	@false
20746ad7cbc0SNathan Huckleberryendif
20756ad7cbc0SNathan Huckleberry
20761da177e4SLinus Torvalds# Scripts to check various things for consistency
20771da177e4SLinus Torvalds# ---------------------------------------------------------------------------
20781da177e4SLinus Torvalds
20797dfbea4cSJacob KellerPHONY += includecheck versioncheck coccicheck export_report
2080279f3dd3SPeter Foley
20811da177e4SLinus Torvaldsincludecheck:
2082436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
20831da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
208480007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
20851da177e4SLinus Torvalds
20861da177e4SLinus Torvaldsversioncheck:
20872ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
20881da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
208980007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
20901da177e4SLinus Torvalds
209174425eeeSNicolas Palixcoccicheck:
2092858805b3SMasahiro Yamada	$(Q)$(BASH) $(srctree)/scripts/$@
209374425eeeSNicolas Palix
2094295ac051SAdrian Bunkexport_report:
2095295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
2096295ac051SAdrian Bunk
2097c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
2098e3ccf6e3SJeff Dike
2099011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
2100011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
2101011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
2102011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
2103011e3a9aSJeff Dikeifeq ($(ARCH), um)
2104011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
2105011e3a9aSJeff Dikeelse
2106011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
2107011e3a9aSJeff Dikeendif
21081da177e4SLinus Torvaldscheckstack:
21091da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
211075dd4747SMasahiro Yamada	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
21111da177e4SLinus Torvalds
21127b8ea53dSAmerigo Wangkernelrelease:
21137b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
211401ab1788SAmerigo Wang
2115cb58455cSSam Ravnborgkernelversion:
21162244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
21171da177e4SLinus Torvalds
2118c398ff00SMike Marciniszynimage_name:
2119c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
2120c398ff00SMike Marciniszyn
21211da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
21220663c68cSMasahiro Yamada      cmd_rmfiles = rm -rf $(rm-files)
21231da177e4SLinus Torvalds
2124392885eeSMasahiro Yamada# read saved command lines for existing targets
2125392885eeSMasahiro Yamadaexisting-targets := $(wildcard $(sort $(targets)))
21261da177e4SLinus Torvalds
2127b999923cSMasahiro Yamada-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
21281da177e4SLinus Torvalds
212946b7c492SSZ Lin (林上智)endif # config-build
21302042b548SMasahiro Yamadaendif # mixed-build
2131688931a5SMasahiro Yamadaendif # need-sub-make
21321da177e4SLinus Torvalds
21334f193362SPaul SmithPHONY += FORCE
21341da177e4SLinus TorvaldsFORCE:
21354f193362SPaul Smith
2136bd412d81SUlf Magnusson# Declare the contents of the PHONY variable as phony.  We keep that
2137fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
21384f193362SPaul Smith.PHONY: $(PHONY)
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