xref: /openbmc/linux/Makefile (revision ba79d401)
1 c517d838SLinus TorvaldsVERSION = 4
2 f55532a0SLinus TorvaldsPATCHLEVEL = 6
3 55922c9dSLinus TorvaldsSUBLEVEL = 0
4 f55532a0SLinus TorvaldsEXTRAVERSION = -rc1
5 25cb62b7SLinus TorvaldsNAME = Blurry Fish Butt
6 1da177e4SLinus Torvalds
7 1da177e4SLinus Torvalds# *DOCUMENTATION*
8 1da177e4SLinus Torvalds# To see a list of typical targets execute "make help"
9 1da177e4SLinus Torvalds# More info can be located in ./README
10 1da177e4SLinus Torvalds# Comments in this file are targeted only to the developer, do not
11 1da177e4SLinus Torvalds# expect to learn how to build the kernel reading this file.
12 1da177e4SLinus Torvalds
13 a436bb7bSMasahiro Yamada# o Do not use make's built-in rules and variables
14 d384e35aSLinus Nilsson#   (this increases performance and avoids hard-to-debug behaviour);
15 a436bb7bSMasahiro Yamada# o Look for make include files relative to root of kernel src
16 a436bb7bSMasahiro YamadaMAKEFLAGS += -rR --include-dir=$(CURDIR)
17 1da177e4SLinus Torvalds
18 c051346bSH. Peter Anvin# Avoid funny character set dependencies
19 06b5dc64SH. Peter Anvinunexport LC_ALL
20 c051346bSH. Peter AnvinLC_COLLATE=C
21 c051346bSH. Peter AnvinLC_NUMERIC=C
22 07105202SMichal Marekexport LC_COLLATE LC_NUMERIC
23 c051346bSH. Peter Anvin
24 ab7474eaSBorislav Petkov# Avoid interference with shell env settings
25 ab7474eaSBorislav Petkovunexport GREP_OPTIONS
26 ab7474eaSBorislav Petkov
27 1da177e4SLinus Torvalds# We are using a recursive build, so we need to do a little thinking
28 1da177e4SLinus Torvalds# to get the ordering right.
29 1da177e4SLinus Torvalds#
30 1da177e4SLinus Torvalds# Most importantly: sub-Makefiles should only ever modify files in
31 1da177e4SLinus Torvalds# their own directory. If in some directory we have a dependency on
32 1da177e4SLinus Torvalds# a file in another dir (which doesn't happen often, but it's often
33 1da177e4SLinus Torvalds# unavoidable when linking the built-in.o targets which finally
34 1da177e4SLinus Torvalds# turn into vmlinux), we will call a sub make in that other dir, and
35 1da177e4SLinus Torvalds# after that we are sure that everything which is in that other dir
36 1da177e4SLinus Torvalds# is now up to date.
37 1da177e4SLinus Torvalds#
38 1da177e4SLinus Torvalds# The only cases where we need to modify files which have global
39 1da177e4SLinus Torvalds# effects are thus separated out and done before the recursive
40 1da177e4SLinus Torvalds# descending is started. They are now explicitly listed as the
41 1da177e4SLinus Torvalds# prepare rule.
42 1da177e4SLinus Torvalds
43 066b7ed9SMichal Marek# Beautify output
44 066b7ed9SMichal Marek# ---------------------------------------------------------------------------
45 066b7ed9SMichal Marek#
46 066b7ed9SMichal Marek# Normally, we echo the whole command before executing it. By making
47 066b7ed9SMichal Marek# that echo $($(quiet)$(cmd)), we now have the possibility to set
48 066b7ed9SMichal Marek# $(quiet) to choose other forms of output instead, e.g.
49 066b7ed9SMichal Marek#
50 066b7ed9SMichal Marek#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
51 066b7ed9SMichal Marek#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
52 066b7ed9SMichal Marek#
53 066b7ed9SMichal Marek# If $(quiet) is empty, the whole command will be printed.
54 066b7ed9SMichal Marek# If it is set to "quiet_", only the short version will be printed.
55 066b7ed9SMichal Marek# If it is set to "silent_", nothing will be printed at all, since
56 066b7ed9SMichal Marek# the variable $(silent_cmd_cc_o_c) doesn't exist.
57 066b7ed9SMichal Marek#
58 066b7ed9SMichal Marek# A simple variant is to prefix commands with $(Q) - that's useful
59 066b7ed9SMichal Marek# for commands that shall be hidden in non-verbose mode.
60 066b7ed9SMichal Marek#
61 066b7ed9SMichal Marek#	$(Q)ln $@ :<
62 066b7ed9SMichal Marek#
63 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
64 066b7ed9SMichal Marek# If KBUILD_VERBOSE equals 1 then the above command is displayed.
65 066b7ed9SMichal Marek#
66 1da177e4SLinus Torvalds# To put more focus on warnings, be less verbose as default
67 1da177e4SLinus Torvalds# Use 'make V=1' to see the full commands
68 1da177e4SLinus Torvalds
69 1da177e4SLinus Torvaldsifeq ("$(origin V)", "command line")
70 1da177e4SLinus Torvalds  KBUILD_VERBOSE = $(V)
71 1da177e4SLinus Torvaldsendif
72 1da177e4SLinus Torvaldsifndef KBUILD_VERBOSE
73 1da177e4SLinus Torvalds  KBUILD_VERBOSE = 0
74 1da177e4SLinus Torvaldsendif
75 1da177e4SLinus Torvalds
76 066b7ed9SMichal Marekifeq ($(KBUILD_VERBOSE),1)
77 066b7ed9SMichal Marek  quiet =
78 066b7ed9SMichal Marek  Q =
79 066b7ed9SMichal Marekelse
80 066b7ed9SMichal Marek  quiet=quiet_
81 066b7ed9SMichal Marek  Q = @
82 066b7ed9SMichal Marekendif
83 066b7ed9SMichal Marek
84 066b7ed9SMichal Marek# If the user is running make -s (silent mode), suppress echoing of
85 066b7ed9SMichal Marek# commands
86 066b7ed9SMichal Marek
87 066b7ed9SMichal Marekifneq ($(filter 4.%,$(MAKE_VERSION)),)	# make-4
88 066b7ed9SMichal Marekifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
89 066b7ed9SMichal Marek  quiet=silent_
90 066b7ed9SMichal Marekendif
91 066b7ed9SMichal Marekelse					# make-3.8x
92 066b7ed9SMichal Marekifneq ($(filter s% -s%,$(MAKEFLAGS)),)
93 066b7ed9SMichal Marek  quiet=silent_
94 066b7ed9SMichal Marekendif
95 066b7ed9SMichal Marekendif
96 066b7ed9SMichal Marek
97 066b7ed9SMichal Marekexport quiet Q KBUILD_VERBOSE
98 066b7ed9SMichal Marek
99 1da177e4SLinus Torvalds# kbuild supports saving output files in a separate directory.
100 1da177e4SLinus Torvalds# To locate output files in a separate directory two syntaxes are supported.
101 1da177e4SLinus Torvalds# In both cases the working directory must be the root of the kernel src.
102 1da177e4SLinus Torvalds# 1) O=
103 1da177e4SLinus Torvalds# Use "make O=dir/to/store/output/files/"
104 1da177e4SLinus Torvalds#
105 1da177e4SLinus Torvalds# 2) Set KBUILD_OUTPUT
106 1da177e4SLinus Torvalds# Set the environment variable KBUILD_OUTPUT to point to the directory
107 1da177e4SLinus Torvalds# where the output files shall be placed.
108 1da177e4SLinus Torvalds# export KBUILD_OUTPUT=dir/to/store/output/files/
109 1da177e4SLinus Torvalds# make
110 1da177e4SLinus Torvalds#
111 1da177e4SLinus Torvalds# The O= assignment takes precedence over the KBUILD_OUTPUT environment
112 1da177e4SLinus Torvalds# variable.
113 1da177e4SLinus Torvalds
114 1da177e4SLinus Torvalds# KBUILD_SRC is set on invocation of make in OBJ directory
115 1da177e4SLinus Torvalds# KBUILD_SRC is not intended to be used by the regular user (for now)
116 1da177e4SLinus Torvaldsifeq ($(KBUILD_SRC),)
117 1da177e4SLinus Torvalds
118 1da177e4SLinus Torvalds# OK, Make called in directory where kernel src resides
119 1da177e4SLinus Torvalds# Do we want to locate output files in a separate directory?
120 1da177e4SLinus Torvaldsifeq ("$(origin O)", "command line")
121 1da177e4SLinus Torvalds  KBUILD_OUTPUT := $(O)
122 1da177e4SLinus Torvaldsendif
123 1da177e4SLinus Torvalds
124 1da177e4SLinus Torvalds# That's our default target when none is given on the command line
125 4f193362SPaul SmithPHONY := _all
126 1da177e4SLinus Torvalds_all:
127 1da177e4SLinus Torvalds
128 1cacc9abSSam Ravnborg# Cancel implicit rules on top Makefile
129 1cacc9abSSam Ravnborg$(CURDIR)/Makefile Makefile: ;
130 1cacc9abSSam Ravnborg
131 1da177e4SLinus Torvaldsifneq ($(KBUILD_OUTPUT),)
132 1da177e4SLinus Torvalds# Invoke a second make in the output directory, passing relevant variables
133 1da177e4SLinus Torvalds# check that the output directory actually exists
134 1da177e4SLinus Torvaldssaved-output := $(KBUILD_OUTPUT)
135 1c9e70a5SMasahiro YamadaKBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
136 1c9e70a5SMasahiro Yamada								&& /bin/pwd)
137 1da177e4SLinus Torvalds$(if $(KBUILD_OUTPUT),, \
138 1c9e70a5SMasahiro Yamada     $(error failed to create output directory "$(saved-output)"))
139 1da177e4SLinus Torvalds
140 0b35786dSMilton MillerPHONY += $(MAKECMDGOALS) sub-make
141 0b35786dSMilton Miller
142 1cacc9abSSam Ravnborg$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
143 16f89098SCharles Keepax	@:
144 0b35786dSMilton Miller
145 2e8d696bSMasahiro Yamadasub-make:
146 745a2543SMasahiro Yamada	$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
147 aa55c8e2SMasahiro Yamada	-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
148 1da177e4SLinus Torvalds
149 1da177e4SLinus Torvalds# Leave processing to above invocation of make
150 1da177e4SLinus Torvaldsskip-makefile := 1
151 1da177e4SLinus Torvaldsendif # ifneq ($(KBUILD_OUTPUT),)
152 1da177e4SLinus Torvaldsendif # ifeq ($(KBUILD_SRC),)
153 1da177e4SLinus Torvalds
154 1da177e4SLinus Torvalds# We process the rest of the Makefile if this is the final invocation of make
155 1da177e4SLinus Torvaldsifeq ($(skip-makefile),)
156 1da177e4SLinus Torvalds
157 7ff52571SMasahiro Yamada# Do not print "Entering directory ...",
158 7ff52571SMasahiro Yamada# but we want to display it when entering to the output directory
159 7ff52571SMasahiro Yamada# so that IDEs/editors are able to understand relative filenames.
160 7ff52571SMasahiro YamadaMAKEFLAGS += --no-print-directory
161 7ff52571SMasahiro Yamada
162 aa55c8e2SMasahiro Yamada# Call a source code checker (by default, "sparse") as part of the
163 aa55c8e2SMasahiro Yamada# C compilation.
164 aa55c8e2SMasahiro Yamada#
165 aa55c8e2SMasahiro Yamada# Use 'make C=1' to enable checking of only re-compiled files.
166 aa55c8e2SMasahiro Yamada# Use 'make C=2' to enable checking of *all* source files, regardless
167 aa55c8e2SMasahiro Yamada# of whether they are re-compiled or not.
168 aa55c8e2SMasahiro Yamada#
169 aa55c8e2SMasahiro Yamada# See the file "Documentation/sparse.txt" for more details, including
170 aa55c8e2SMasahiro Yamada# where to get the "sparse" utility.
171 aa55c8e2SMasahiro Yamada
172 aa55c8e2SMasahiro Yamadaifeq ("$(origin C)", "command line")
173 aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = $(C)
174 aa55c8e2SMasahiro Yamadaendif
175 aa55c8e2SMasahiro Yamadaifndef KBUILD_CHECKSRC
176 aa55c8e2SMasahiro Yamada  KBUILD_CHECKSRC = 0
177 aa55c8e2SMasahiro Yamadaendif
178 aa55c8e2SMasahiro Yamada
179 aa55c8e2SMasahiro Yamada# Use make M=dir to specify directory of external module to build
180 aa55c8e2SMasahiro Yamada# Old syntax make ... SUBDIRS=$PWD is still supported
181 aa55c8e2SMasahiro Yamada# Setting the environment variable KBUILD_EXTMOD take precedence
182 aa55c8e2SMasahiro Yamadaifdef SUBDIRS
183 aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD ?= $(SUBDIRS)
184 aa55c8e2SMasahiro Yamadaendif
185 aa55c8e2SMasahiro Yamada
186 aa55c8e2SMasahiro Yamadaifeq ("$(origin M)", "command line")
187 aa55c8e2SMasahiro Yamada  KBUILD_EXTMOD := $(M)
188 aa55c8e2SMasahiro Yamadaendif
189 aa55c8e2SMasahiro Yamada
190 1da177e4SLinus Torvalds# If building an external module we do not care about the all: rule
191 1da177e4SLinus Torvalds# but instead _all depend on modules
192 4f193362SPaul SmithPHONY += all
193 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
194 1da177e4SLinus Torvalds_all: all
195 1da177e4SLinus Torvaldselse
196 1da177e4SLinus Torvalds_all: modules
197 1da177e4SLinus Torvaldsendif
198 1da177e4SLinus Torvalds
199 9da0763bSMichal Marekifeq ($(KBUILD_SRC),)
200 9da0763bSMichal Marek        # building in the source tree
201 9da0763bSMichal Marek        srctree := .
202 9da0763bSMichal Marekelse
203 9da0763bSMichal Marek        ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
204 9da0763bSMichal Marek                # building in a subdirectory of the source tree
205 9da0763bSMichal Marek                srctree := ..
206 9da0763bSMichal Marek        else
207 9da0763bSMichal Marek                srctree := $(KBUILD_SRC)
208 9da0763bSMichal Marek        endif
209 9da0763bSMichal Marekendif
210 7e1c0477SMichal Marekobjtree		:= .
211 1da177e4SLinus Torvaldssrc		:= $(srctree)
212 1da177e4SLinus Torvaldsobj		:= $(objtree)
213 1da177e4SLinus Torvalds
214 0f558c33SMattia DongiliVPATH		:= $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
215 1da177e4SLinus Torvalds
216 11294235SAmerigo Wangexport srctree objtree VPATH
217 1da177e4SLinus Torvalds
218 1da177e4SLinus Torvalds# SUBARCH tells the usermode build what the underlying arch is.  That is set
219 1da177e4SLinus Torvalds# first, and if a usermode build is happening, the "ARCH=um" on the command
220 1da177e4SLinus Torvalds# line overrides the setting of ARCH below.  If a native build is happening,
221 1da177e4SLinus Torvalds# then ARCH is assigned, getting whatever value it gets normally, and
222 1da177e4SLinus Torvalds# SUBARCH is subsequently ignored.
223 1da177e4SLinus Torvalds
224 ffee0de4SDavid WoodhouseSUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
225 ffee0de4SDavid Woodhouse				  -e s/sun4u/sparc64/ \
226 1da177e4SLinus Torvalds				  -e s/arm.*/arm/ -e s/sa110/arm/ \
227 39990b5eSLinus Torvalds				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
228 236b1957SPaul Mundt				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
229 f1b99392SWill Deacon				  -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
230 1da177e4SLinus Torvalds
231 1da177e4SLinus Torvalds# Cross compiling and selecting different set of gcc/bin-utils
232 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
233 1da177e4SLinus Torvalds#
234 1da177e4SLinus Torvalds# When performing cross compilation for other architectures ARCH shall be set
235 1da177e4SLinus Torvalds# to the target architecture. (See arch/* for the possibilities).
236 1da177e4SLinus Torvalds# ARCH can be set during invocation of make:
237 1da177e4SLinus Torvalds# make ARCH=ia64
238 1da177e4SLinus Torvalds# Another way is to have ARCH set in the environment.
239 1da177e4SLinus Torvalds# The default ARCH is the host where make is executed.
240 1da177e4SLinus Torvalds
241 1da177e4SLinus Torvalds# CROSS_COMPILE specify the prefix used for all executables used
242 1da177e4SLinus Torvalds# during compilation. Only gcc and related bin-utils executables
243 1da177e4SLinus Torvalds# are prefixed with $(CROSS_COMPILE).
244 1da177e4SLinus Torvalds# CROSS_COMPILE can be set on the command line
245 1da177e4SLinus Torvalds# make CROSS_COMPILE=ia64-linux-
246 1da177e4SLinus Torvalds# Alternatively CROSS_COMPILE can be set in the environment.
247 84336466SRoland McGrath# A third alternative is to store a setting in .config so that plain
248 84336466SRoland McGrath# "make" in the configured kernel build directory always uses that.
249 1da177e4SLinus Torvalds# Default value for CROSS_COMPILE is not to prefix executables
250 1da177e4SLinus Torvalds# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
251 2331d1a6SSam RavnborgARCH		?= $(SUBARCH)
252 84336466SRoland McGrathCROSS_COMPILE	?= $(CONFIG_CROSS_COMPILE:"%"=%)
253 1da177e4SLinus Torvalds
254 1da177e4SLinus Torvalds# Architecture as present in compile.h
255 1da177e4SLinus TorvaldsUTS_MACHINE 	:= $(ARCH)
256 6752ed90SThomas GleixnerSRCARCH 	:= $(ARCH)
257 1da177e4SLinus Torvalds
258 d746d647SSam Ravnborg# Additional ARCH settings for x86
259 d746d647SSam Ravnborgifeq ($(ARCH),i386)
260 d746d647SSam Ravnborg        SRCARCH := x86
261 d746d647SSam Ravnborgendif
262 d746d647SSam Ravnborgifeq ($(ARCH),x86_64)
263 d746d647SSam Ravnborg        SRCARCH := x86
264 d746d647SSam Ravnborgendif
265 74b469f2SSam Ravnborg
266 5e538790SSam Ravnborg# Additional ARCH settings for sparc
267 e69f58c0SNamhyung Kimifeq ($(ARCH),sparc32)
268 e69f58c0SNamhyung Kim       SRCARCH := sparc
269 e69f58c0SNamhyung Kimendif
270 a439fe51SSam Ravnborgifeq ($(ARCH),sparc64)
271 5e538790SSam Ravnborg       SRCARCH := sparc
272 a439fe51SSam Ravnborgendif
273 2fb9b1bdSSam Ravnborg
274 3cc000b5SPaul Mundt# Additional ARCH settings for sh
275 3cc000b5SPaul Mundtifeq ($(ARCH),sh64)
276 3cc000b5SPaul Mundt       SRCARCH := sh
277 3cc000b5SPaul Mundtendif
278 3cc000b5SPaul Mundt
279 18aecc2bSChris Metcalf# Additional ARCH settings for tile
280 6738d321SChris Metcalfifeq ($(ARCH),tilepro)
281 6738d321SChris Metcalf       SRCARCH := tile
282 6738d321SChris Metcalfendif
283 18aecc2bSChris Metcalfifeq ($(ARCH),tilegx)
284 18aecc2bSChris Metcalf       SRCARCH := tile
285 18aecc2bSChris Metcalfendif
286 18aecc2bSChris Metcalf
287 5e538790SSam Ravnborg# Where to locate arch specific headers
288 5e538790SSam Ravnborghdr-arch  := $(SRCARCH)
289 5e538790SSam Ravnborg
290 14cdd3c4SRoman ZippelKCONFIG_CONFIG	?= .config
291 41263fc6SBen Gardinerexport KCONFIG_CONFIG
292 14cdd3c4SRoman Zippel
293 1da177e4SLinus Torvalds# SHELL used by kbuild
294 1da177e4SLinus TorvaldsCONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
295 1da177e4SLinus Torvalds	  else if [ -x /bin/bash ]; then echo /bin/bash; \
296 1da177e4SLinus Torvalds	  else echo sh; fi ; fi)
297 1da177e4SLinus Torvalds
298 1da177e4SLinus TorvaldsHOSTCC       = gcc
299 1da177e4SLinus TorvaldsHOSTCXX      = g++
300 51b97e35SKirill A. ShutemovHOSTCFLAGS   = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
301 1da177e4SLinus TorvaldsHOSTCXXFLAGS = -O2
302 1da177e4SLinus Torvalds
303 61163efaSBehan Websterifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
304 61163efaSBehan WebsterHOSTCFLAGS  += -Wno-unused-value -Wno-unused-parameter \
305 61163efaSBehan Webster		-Wno-missing-field-initializers -fno-delete-null-pointer-checks
306 61163efaSBehan Websterendif
307 61163efaSBehan Webster
308 1da177e4SLinus Torvalds# Decide whether to build built-in, modular, or both.
309 1da177e4SLinus Torvalds# Normally, just do built-in.
310 1da177e4SLinus Torvalds
311 1da177e4SLinus TorvaldsKBUILD_MODULES :=
312 1da177e4SLinus TorvaldsKBUILD_BUILTIN := 1
313 1da177e4SLinus Torvalds
314 1da177e4SLinus Torvalds# If we have only "make modules", don't compile built-in objects.
315 1da177e4SLinus Torvalds# When we're building modules with modversions, we need to consider
316 1da177e4SLinus Torvalds# the built-in objects during the descend as well, in order to
317 1da177e4SLinus Torvalds# make sure the checksums are up to date before we record them.
318 1da177e4SLinus Torvalds
319 1da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),modules)
320 1da177e4SLinus Torvalds  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
321 1da177e4SLinus Torvaldsendif
322 1da177e4SLinus Torvalds
323 1da177e4SLinus Torvalds# If we have "make <whatever> modules", compile modules
324 1da177e4SLinus Torvalds# in addition to whatever we do anyway.
325 1da177e4SLinus Torvalds# Just "make" or "make all" shall build modules as well
326 1da177e4SLinus Torvalds
327 1da177e4SLinus Torvaldsifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
328 1da177e4SLinus Torvalds  KBUILD_MODULES := 1
329 1da177e4SLinus Torvaldsendif
330 1da177e4SLinus Torvalds
331 1da177e4SLinus Torvaldsifeq ($(MAKECMDGOALS),)
332 1da177e4SLinus Torvalds  KBUILD_MODULES := 1
333 1da177e4SLinus Torvaldsendif
334 1da177e4SLinus Torvalds
335 e579d351SSam Ravnborgexport KBUILD_MODULES KBUILD_BUILTIN
336 1da177e4SLinus Torvaldsexport KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
337 1da177e4SLinus Torvalds
338 1cacc9abSSam Ravnborg# We need some generic definitions (do not try to remake the file).
339 a436bb7bSMasahiro Yamadascripts/Kbuild.include: ;
340 a436bb7bSMasahiro Yamadainclude scripts/Kbuild.include
341 8ec4b4ffSSam Ravnborg
342 1da177e4SLinus Torvalds# Make variables (CC, etc...)
343 1da177e4SLinus TorvaldsAS		= $(CROSS_COMPILE)as
344 1da177e4SLinus TorvaldsLD		= $(CROSS_COMPILE)ld
345 1da177e4SLinus TorvaldsCC		= $(CROSS_COMPILE)gcc
346 1da177e4SLinus TorvaldsCPP		= $(CC) -E
347 1da177e4SLinus TorvaldsAR		= $(CROSS_COMPILE)ar
348 1da177e4SLinus TorvaldsNM		= $(CROSS_COMPILE)nm
349 1da177e4SLinus TorvaldsSTRIP		= $(CROSS_COMPILE)strip
350 1da177e4SLinus TorvaldsOBJCOPY		= $(CROSS_COMPILE)objcopy
351 1da177e4SLinus TorvaldsOBJDUMP		= $(CROSS_COMPILE)objdump
352 1da177e4SLinus TorvaldsAWK		= awk
353 1da177e4SLinus TorvaldsGENKSYMS	= scripts/genksyms/genksyms
354 caa27b66SSam RavnborgINSTALLKERNEL  := installkernel
355 1da177e4SLinus TorvaldsDEPMOD		= /sbin/depmod
356 1da177e4SLinus TorvaldsPERL		= perl
357 011bf125SMasahiro YamadaPYTHON		= python
358 1da177e4SLinus TorvaldsCHECK		= sparse
359 1da177e4SLinus Torvalds
360 80a7d1d9SHannes EderCHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
361 80a7d1d9SHannes Eder		  -Wbitwise -Wno-return-void $(CF)
362 6588169dSSam RavnborgCFLAGS_MODULE   =
363 6588169dSSam RavnborgAFLAGS_MODULE   =
364 6588169dSSam RavnborgLDFLAGS_MODULE  =
365 1da177e4SLinus TorvaldsCFLAGS_KERNEL	=
366 1da177e4SLinus TorvaldsAFLAGS_KERNEL	=
367 2521f2c2SPeter OberparleiterCFLAGS_GCOV	= -fprofile-arcs -ftest-coverage
368 5c9a8750SDmitry VyukovCFLAGS_KCOV	= -fsanitize-coverage=trace-pc
369 1da177e4SLinus Torvalds
370 1da177e4SLinus Torvalds
371 abbf1590SDavid Howells# Use USERINCLUDE when you must reference the UAPI directories only.
372 abbf1590SDavid HowellsUSERINCLUDE    := \
373 abbf1590SDavid Howells		-I$(srctree)/arch/$(hdr-arch)/include/uapi \
374 abbf1590SDavid Howells		-Iarch/$(hdr-arch)/include/generated/uapi \
375 abbf1590SDavid Howells		-I$(srctree)/include/uapi \
376 abbf1590SDavid Howells		-Iinclude/generated/uapi \
377 abbf1590SDavid Howells                -include $(srctree)/include/linux/kconfig.h
378 abbf1590SDavid Howells
379 1da177e4SLinus Torvalds# Use LINUXINCLUDE when you must reference the include/ directory.
380 1da177e4SLinus Torvalds# Needed to be compatible with the O= option
381 abbf1590SDavid HowellsLINUXINCLUDE    := \
382 abbf1590SDavid Howells		-I$(srctree)/arch/$(hdr-arch)/include \
383 90ac086bSMichal Marek		-Iarch/$(hdr-arch)/include/generated/uapi \
384 abbf1590SDavid Howells		-Iarch/$(hdr-arch)/include/generated \
385 96f13045SSam Ravnborg		$(if $(KBUILD_SRC), -I$(srctree)/include) \
386 abbf1590SDavid Howells		-Iinclude \
387 abbf1590SDavid Howells		$(USERINCLUDE)
388 1da177e4SLinus Torvalds
389 d8672b40SSam RavnborgKBUILD_CPPFLAGS := -D__KERNEL__
390 1da177e4SLinus Torvalds
391 a0f97e06SSam RavnborgKBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
392 94bed2a9SDave Jones		   -fno-strict-aliasing -fno-common \
393 a8735821SFloris Kraak		   -Werror-implicit-function-declaration \
394 51b97e35SKirill A. Shutemov		   -Wno-format-security \
395 51b97e35SKirill A. Shutemov		   -std=gnu89
396 a1c48bb1SGeert Uytterhoeven
397 80c00ba9SSam RavnborgKBUILD_AFLAGS_KERNEL :=
398 80c00ba9SSam RavnborgKBUILD_CFLAGS_KERNEL :=
399 222d394dSSam RavnborgKBUILD_AFLAGS   := -D__ASSEMBLY__
400 6588169dSSam RavnborgKBUILD_AFLAGS_MODULE  := -DMODULE
401 6588169dSSam RavnborgKBUILD_CFLAGS_MODULE  := -DMODULE
402 6588169dSSam RavnborgKBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
403 1da177e4SLinus Torvalds
404 f1d28fb0SRoman Zippel# Read KERNELRELEASE from include/config/kernel.release (if it exists)
405 f1d28fb0SRoman ZippelKERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
406 cacd54efSMichal MarekKERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
407 cb58455cSSam Ravnborg
408 070b98bfSSam Ravnborgexport VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
409 80ef88d6SSam Ravnborgexport ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
410 caa27b66SSam Ravnborgexport CPP AR NM STRIP OBJCOPY OBJDUMP
411 011bf125SMasahiro Yamadaexport MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
412 070b98bfSSam Ravnborgexport HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
413 1da177e4SLinus Torvalds
414 06c5040cSSam Ravnborgexport KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
415 5c9a8750SDmitry Vyukovexport KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN
416 222d394dSSam Ravnborgexport KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
417 6588169dSSam Ravnborgexport KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
418 80c00ba9SSam Ravnborgexport KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
419 40df759eSMichal Marekexport KBUILD_ARFLAGS
420 1da177e4SLinus Torvalds
421 1da177e4SLinus Torvalds# When compiling out-of-tree modules, put MODVERDIR in the module
422 1da177e4SLinus Torvalds# tree rather than in the kernel tree. The kernel tree might
423 1da177e4SLinus Torvalds# even be read-only.
424 1da177e4SLinus Torvaldsexport MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
425 1da177e4SLinus Torvalds
426 1da177e4SLinus Torvalds# Files to ignore in find ... statements
427 1da177e4SLinus Torvalds
428 ae63b2d7SPrarit Bhargavaexport RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
429 ae63b2d7SPrarit Bhargava			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
430 ae63b2d7SPrarit Bhargava			  -prune -o
431 450c6076SJesper Juhlexport RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
432 450c6076SJesper Juhl			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
433 1da177e4SLinus Torvalds
434 1da177e4SLinus Torvalds# ===========================================================================
435 1da177e4SLinus Torvalds# Rules shared between *config targets and build targets
436 1da177e4SLinus Torvalds
437 1da177e4SLinus Torvalds# Basic helpers built in scripts/
438 4f193362SPaul SmithPHONY += scripts_basic
439 1da177e4SLinus Torvaldsscripts_basic:
440 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/basic
441 638adb05SSteven Rostedt	$(Q)rm -f .tmp_quiet_recordmcount
442 1da177e4SLinus Torvalds
443 cd05e6bdSJan Beulich# To avoid any implicit rule to kick in, define an empty command.
444 cd05e6bdSJan Beulichscripts/basic/%: scripts_basic ;
445 cd05e6bdSJan Beulich
446 4f193362SPaul SmithPHONY += outputmakefile
447 fd5f0cd6SJan Beulich# outputmakefile generates a Makefile in the output directory, if using a
448 fd5f0cd6SJan Beulich# separate output directory. This allows convenient use of make in the
449 fd5f0cd6SJan Beulich# output directory.
450 1da177e4SLinus Torvaldsoutputmakefile:
451 fd5f0cd6SJan Beulichifneq ($(KBUILD_SRC),)
452 92979997SAndi Kleen	$(Q)ln -fsn $(srctree) source
453 fd5f0cd6SJan Beulich	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
454 fd5f0cd6SJan Beulich	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
455 fd5f0cd6SJan Beulichendif
456 1da177e4SLinus Torvalds
457 d8ecc5cdSSam Ravnborg# Support for using generic headers in asm-generic
458 d8ecc5cdSSam RavnborgPHONY += asm-generic
459 d8ecc5cdSSam Ravnborgasm-generic:
460 d8ecc5cdSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
461 3c5994c8SCatalin Marinas	            src=asm obj=arch/$(SRCARCH)/include/generated/asm
462 3c5994c8SCatalin Marinas	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
463 3c5994c8SCatalin Marinas	            src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
464 d8ecc5cdSSam Ravnborg
465 1da177e4SLinus Torvalds# To make sure we do not include .config for any of the *config targets
466 1da177e4SLinus Torvalds# catch them early, and hand them over to scripts/kconfig/Makefile
467 1da177e4SLinus Torvalds# It is allowed to specify more targets when calling make, including
468 1da177e4SLinus Torvalds# mixing *config targets and build targets.
469 1da177e4SLinus Torvalds# For example 'make oldconfig all'.
470 1da177e4SLinus Torvalds# Detect when mixed targets is specified, and make a second invocation
471 1da177e4SLinus Torvalds# of make so .config is not included in this case either (for *config).
472 1da177e4SLinus Torvalds
473 10b63956SDavid Howellsversion_h := include/generated/uapi/linux/version.h
474 223c24a7SMichal Marekold_version_h := include/linux/version.h
475 d183e6f5SDavid Howells
476 3eb3c740SRoman Zippelno-dot-config-targets := clean mrproper distclean \
477 fbae4d58SMichal Marek			 cscope gtags TAGS tags help% %docs check% coccicheck \
478 d183e6f5SDavid Howells			 $(version_h) headers_% archheaders archscripts \
479 4aed2fd8SLinus Torvalds			 kernelversion %src-pkg
480 1da177e4SLinus Torvalds
481 1da177e4SLinus Torvaldsconfig-targets := 0
482 1da177e4SLinus Torvaldsmixed-targets  := 0
483 1da177e4SLinus Torvaldsdot-config     := 1
484 1da177e4SLinus Torvalds
485 1da177e4SLinus Torvaldsifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
486 1da177e4SLinus Torvalds	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
487 1da177e4SLinus Torvalds		dot-config := 0
488 1da177e4SLinus Torvalds	endif
489 1da177e4SLinus Torvaldsendif
490 1da177e4SLinus Torvalds
491 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
492 1da177e4SLinus Torvalds        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
493 1da177e4SLinus Torvalds                config-targets := 1
494 d0d38cd9SMasahiro Yamada                ifneq ($(words $(MAKECMDGOALS)),1)
495 1da177e4SLinus Torvalds                        mixed-targets := 1
496 1da177e4SLinus Torvalds                endif
497 1da177e4SLinus Torvalds        endif
498 1da177e4SLinus Torvaldsendif
499 a85a41edSMichal Marek# install and module_install need also be processed one by one
500 a85a41edSMichal Marekifneq ($(filter install,$(MAKECMDGOALS)),)
501 a85a41edSMichal Marek        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
502 a85a41edSMichal Marek	        mixed-targets := 1
503 a85a41edSMichal Marek        endif
504 a85a41edSMichal Marekendif
505 1da177e4SLinus Torvalds
506 1da177e4SLinus Torvaldsifeq ($(mixed-targets),1)
507 1da177e4SLinus Torvalds# ===========================================================================
508 1da177e4SLinus Torvalds# We're called with mixed targets (*config and build targets).
509 1da177e4SLinus Torvalds# Handle them one by one.
510 1da177e4SLinus Torvalds
511 9319f453SMasahiro YamadaPHONY += $(MAKECMDGOALS) __build_one_by_one
512 9319f453SMasahiro Yamada
513 9319f453SMasahiro Yamada$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
514 9319f453SMasahiro Yamada	@:
515 9319f453SMasahiro Yamada
516 9319f453SMasahiro Yamada__build_one_by_one:
517 9319f453SMasahiro Yamada	$(Q)set -e; \
518 9319f453SMasahiro Yamada	for i in $(MAKECMDGOALS); do \
519 9319f453SMasahiro Yamada		$(MAKE) -f $(srctree)/Makefile $$i; \
520 9319f453SMasahiro Yamada	done
521 1da177e4SLinus Torvalds
522 1da177e4SLinus Torvaldselse
523 1da177e4SLinus Torvaldsifeq ($(config-targets),1)
524 1da177e4SLinus Torvalds# ===========================================================================
525 1da177e4SLinus Torvalds# *config targets only - make sure prerequisites are updated, and descend
526 1da177e4SLinus Torvalds# in scripts/kconfig to make the *config target
527 1da177e4SLinus Torvalds
528 1da177e4SLinus Torvalds# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
529 1da177e4SLinus Torvalds# KBUILD_DEFCONFIG may point out an alternative default configuration
530 1da177e4SLinus Torvalds# used for 'make defconfig'
531 a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
532 61bee204SAl Viroexport KBUILD_DEFCONFIG KBUILD_KCONFIG
533 1da177e4SLinus Torvalds
534 31110ebbSSam Ravnborgconfig: scripts_basic outputmakefile FORCE
535 31110ebbSSam Ravnborg	$(Q)$(MAKE) $(build)=scripts/kconfig $@
536 31110ebbSSam Ravnborg
537 31110ebbSSam Ravnborg%config: scripts_basic outputmakefile FORCE
538 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=scripts/kconfig $@
539 1da177e4SLinus Torvalds
540 1da177e4SLinus Torvaldselse
541 1da177e4SLinus Torvalds# ===========================================================================
542 1da177e4SLinus Torvalds# Build targets only - this includes vmlinux, arch specific targets, clean
543 1da177e4SLinus Torvalds# targets and others. In general all targets except *config targets.
544 1da177e4SLinus Torvalds
545 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
546 1da177e4SLinus Torvalds# Additional helpers built in scripts/
547 1da177e4SLinus Torvalds# Carefully list dependencies so we do not try to build scripts twice
548 070b98bfSSam Ravnborg# in parallel
549 4f193362SPaul SmithPHONY += scripts
550 a54292f5SAndreas Schwabscripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
551 a54292f5SAndreas Schwab	 asm-generic
552 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(@)
553 1da177e4SLinus Torvalds
554 1da177e4SLinus Torvalds# Objects we will link into vmlinux / subdirs we need to visit
555 1da177e4SLinus Torvaldsinit-y		:= init/
556 4d2acfbfSDavid Woodhousedrivers-y	:= drivers/ sound/ firmware/
557 1da177e4SLinus Torvaldsnet-y		:= net/
558 1da177e4SLinus Torvaldslibs-y		:= lib/
559 1da177e4SLinus Torvaldscore-y		:= usr/
560 37d9fe47SFeng Wuvirt-y		:= virt/
561 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
562 1da177e4SLinus Torvalds
563 1da177e4SLinus Torvaldsifeq ($(dot-config),1)
564 9ee4e336SSam Ravnborg# Read in config
565 9ee4e336SSam Ravnborg-include include/config/auto.conf
566 1da177e4SLinus Torvalds
567 9ee4e336SSam Ravnborgifeq ($(KBUILD_EXTMOD),)
568 1da177e4SLinus Torvalds# Read in dependencies to all Kconfig* files, make sure to run
569 1da177e4SLinus Torvalds# oldconfig if changes are detected.
570 c955ccafSRoman Zippel-include include/config/auto.conf.cmd
571 1da177e4SLinus Torvalds
572 1da177e4SLinus Torvalds# To avoid any implicit rule to kick in, define an empty command
573 14cdd3c4SRoman Zippel$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
574 1da177e4SLinus Torvalds
575 c955ccafSRoman Zippel# If .config is newer than include/config/auto.conf, someone tinkered
576 752625cfSSam Ravnborg# with it and forgot to run make oldconfig.
577 070b98bfSSam Ravnborg# if auto.conf.cmd is missing then we are probably in a cleaned tree so
578 752625cfSSam Ravnborg# we execute the config step to be sure to catch updated Kconfig files
579 bc081dd6SMichal Marekinclude/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
580 1da177e4SLinus Torvalds	$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
581 1da177e4SLinus Torvaldselse
582 264a2683SSam Ravnborg# external modules needs include/generated/autoconf.h and include/config/auto.conf
583 9ee4e336SSam Ravnborg# but do not care if they are up-to-date. Use auto.conf to trigger the test
584 9ee4e336SSam RavnborgPHONY += include/config/auto.conf
585 9ee4e336SSam Ravnborg
586 9ee4e336SSam Ravnborginclude/config/auto.conf:
587 264a2683SSam Ravnborg	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
588 5369f550SMichal Marek	echo >&2;							\
589 5369f550SMichal Marek	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
590 5369f550SMichal Marek	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
591 5369f550SMichal Marek	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
592 5369f550SMichal Marek	echo >&2 ;							\
593 9ee4e336SSam Ravnborg	/bin/false)
594 9ee4e336SSam Ravnborg
595 9ee4e336SSam Ravnborgendif # KBUILD_EXTMOD
596 c955ccafSRoman Zippel
597 1da177e4SLinus Torvaldselse
598 1da177e4SLinus Torvalds# Dummy target needed, because used as prerequisite
599 c955ccafSRoman Zippelinclude/config/auto.conf: ;
600 9ee4e336SSam Ravnborgendif # $(dot-config)
601 1da177e4SLinus Torvalds
602 1da177e4SLinus Torvalds# The all: target is the default when no target is given on the
603 1da177e4SLinus Torvalds# command line.
604 1da177e4SLinus Torvalds# This allow a user to issue only 'make' to build a kernel including modules
605 c8447161SMichal Marek# Defaults to vmlinux, but the arch makefile usually adds further targets
606 1da177e4SLinus Torvaldsall: vmlinux
607 1da177e4SLinus Torvalds
608 6dd3f13eSMichal Marek# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
609 6dd3f13eSMichal Marek# values of the respective KBUILD_* variables
610 6dd3f13eSMichal MarekARCH_CPPFLAGS :=
611 6dd3f13eSMichal MarekARCH_AFLAGS :=
612 6dd3f13eSMichal MarekARCH_CFLAGS :=
613 a436bb7bSMasahiro Yamadainclude arch/$(SRCARCH)/Makefile
614 a1c48bb1SGeert Uytterhoeven
615 a1c48bb1SGeert UytterhoevenKBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
616 a1c48bb1SGeert Uytterhoeven
617 1da177e4SLinus Torvaldsifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
618 e74fc973SArnd BergmannKBUILD_CFLAGS	+= -Os $(call cc-disable-warning,maybe-uninitialized,)
619 1da177e4SLinus Torvaldselse
620 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -O2
621 1da177e4SLinus Torvaldsendif
622 1da177e4SLinus Torvalds
623 69102311SJiri Kosina# Tell gcc to never replace conditional load with a non-conditional one
624 69102311SJiri KosinaKBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
625 69102311SJiri Kosina
626 1873e870SAndi Kleenifdef CONFIG_READABLE_ASM
627 1873e870SAndi Kleen# Disable optimizations that make assembler listings hard to read.
628 1873e870SAndi Kleen# reorder blocks reorders the control in the function
629 1873e870SAndi Kleen# ipa clone creates specialized cloned functions
630 1873e870SAndi Kleen# partial inlining inlines only parts of functions
631 1873e870SAndi KleenKBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
632 1873e870SAndi Kleen                 $(call cc-option,-fno-ipa-cp-clone,) \
633 1873e870SAndi Kleen                 $(call cc-option,-fno-partial-inlining)
634 1873e870SAndi Kleenendif
635 1873e870SAndi Kleen
636 08f67461SMike Frysingerifneq ($(CONFIG_FRAME_WARN),0)
637 35bb5b1eSAndi KleenKBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
638 35bb5b1eSAndi Kleenendif
639 35bb5b1eSAndi Kleen
640 19952a92SKees Cook# Handle stack protector mode.
641 1332429bSKees Cook#
642 1332429bSKees Cook# Since kbuild can potentially perform two passes (first with the old
643 1332429bSKees Cook# .config values and then with updated .config values), we cannot error out
644 1332429bSKees Cook# if a desired compiler option is unsupported. If we were to error, kbuild
645 1332429bSKees Cook# could never get to the second pass and actually notice that we changed
646 1332429bSKees Cook# the option to something that was supported.
647 1332429bSKees Cook#
648 1332429bSKees Cook# Additionally, we don't want to fallback and/or silently change which compiler
649 1332429bSKees Cook# flags will be used, since that leads to producing kernels with different
650 1332429bSKees Cook# security feature characteristics depending on the compiler used. ("But I
651 1332429bSKees Cook# selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
652 1332429bSKees Cook#
653 1332429bSKees Cook# The middle ground is to warn here so that the failed option is obvious, but
654 1332429bSKees Cook# to let the build fail with bad compiler flags so that we can't produce a
655 1332429bSKees Cook# kernel when there is a CONFIG and compiler mismatch.
656 1332429bSKees Cook#
657 8779657dSKees Cookifdef CONFIG_CC_STACKPROTECTOR_REGULAR
658 19952a92SKees Cook  stackp-flag := -fstack-protector
659 19952a92SKees Cook  ifeq ($(call cc-option, $(stackp-flag)),)
660 6c15b327SJan Beulich    $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
661 27b2a49aSFathi Boudra             -fstack-protector not supported by compiler)
662 5d707e9cSTejun Heo  endif
663 6c15b327SJan Beulichelse
664 6c15b327SJan Beulichifdef CONFIG_CC_STACKPROTECTOR_STRONG
665 8779657dSKees Cook  stackp-flag := -fstack-protector-strong
666 8779657dSKees Cook  ifeq ($(call cc-option, $(stackp-flag)),)
667 8779657dSKees Cook    $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
668 8779657dSKees Cook	      -fstack-protector-strong not supported by compiler)
669 8779657dSKees Cook  endif
670 19952a92SKees Cookelse
671 19952a92SKees Cook  # Force off for distro compilers that enable stack protector by default.
672 19952a92SKees Cook  stackp-flag := $(call cc-option, -fno-stack-protector)
673 19952a92SKees Cookendif
674 6c15b327SJan Beulichendif
675 19952a92SKees CookKBUILD_CFLAGS += $(stackp-flag)
676 e06b8b98SSam Ravnborg
677 5c9a8750SDmitry Vyukovifdef CONFIG_KCOV
678 5c9a8750SDmitry Vyukov  ifeq ($(call cc-option, $(CFLAGS_KCOV)),)
679 5c9a8750SDmitry Vyukov    $(warning Cannot use CONFIG_KCOV: \
680 5c9a8750SDmitry Vyukov             -fsanitize-coverage=trace-pc is not supported by compiler)
681 5c9a8750SDmitry Vyukov    CFLAGS_KCOV =
682 5c9a8750SDmitry Vyukov  endif
683 5c9a8750SDmitry Vyukovendif
684 5c9a8750SDmitry Vyukov
685 5631d9c4SMichal Marekifeq ($(cc-name),clang)
686 61163efaSBehan WebsterKBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
687 61163efaSBehan WebsterKBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
688 61163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
689 61163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
690 61163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, gnu)
691 61163efaSBehan Webster# Quiet clang warning: comparison of unsigned expression < 0 is always false
692 61163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
693 61163efaSBehan Webster# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
694 61163efaSBehan Webster# source of a reference will be _MergedGlobals and not on of the whitelisted names.
695 61163efaSBehan Webster# See modpost pattern 2
696 61163efaSBehan WebsterKBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
697 26ea6bb1SBehan WebsterKBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
698 61163efaSBehan Websterelse
699 61163efaSBehan Webster
700 af0e5d56SDave Jones# This warning generated too much noise in a regular build.
701 af0e5d56SDave Jones# Use make W=1 to enable this warning (see scripts/Makefile.build)
702 8417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
703 61163efaSBehan Websterendif
704 af0e5d56SDave Jones
705 1da177e4SLinus Torvaldsifdef CONFIG_FRAME_POINTER
706 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
707 1da177e4SLinus Torvaldselse
708 7e9501fdSRabin Vincent# Some targets (ARM with Thumb2, for example), can't be built with frame
709 7e9501fdSRabin Vincent# pointers.  For those, we don't have FUNCTION_TRACER automatically
710 7e9501fdSRabin Vincent# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
711 7e9501fdSRabin Vincent# incompatible with -fomit-frame-pointer with current GCC, so we don't use
712 7e9501fdSRabin Vincent# -fomit-frame-pointer with FUNCTION_TRACER.
713 7e9501fdSRabin Vincentifndef CONFIG_FUNCTION_TRACER
714 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -fomit-frame-pointer
715 1da177e4SLinus Torvaldsendif
716 7e9501fdSRabin Vincentendif
717 1da177e4SLinus Torvalds
718 2062afb4SLinus TorvaldsKBUILD_CFLAGS   += $(call cc-option, -fno-var-tracking-assignments)
719 2062afb4SLinus Torvalds
720 1da177e4SLinus Torvaldsifdef CONFIG_DEBUG_INFO
721 866ced95SAndi Kleenifdef CONFIG_DEBUG_INFO_SPLIT
722 866ced95SAndi KleenKBUILD_CFLAGS   += $(call cc-option, -gsplit-dwarf, -g)
723 866ced95SAndi Kleenelse
724 a0f97e06SSam RavnborgKBUILD_CFLAGS	+= -g
725 866ced95SAndi Kleenendif
726 2288328cSBehan WebsterKBUILD_AFLAGS	+= -Wa,-gdwarf-2
727 1da177e4SLinus Torvaldsendif
728 bfaf2dd3SAndi Kleenifdef CONFIG_DEBUG_INFO_DWARF4
729 bfaf2dd3SAndi KleenKBUILD_CFLAGS	+= $(call cc-option, -gdwarf-4,)
730 bfaf2dd3SAndi Kleenendif
731 1da177e4SLinus Torvalds
732 d6f4ceb7SAndi Kleenifdef CONFIG_DEBUG_INFO_REDUCED
733 e82c4bb8SAndi KleenKBUILD_CFLAGS 	+= $(call cc-option, -femit-struct-debug-baseonly) \
734 e82c4bb8SAndi Kleen		   $(call cc-option,-fno-var-tracking)
735 d6f4ceb7SAndi Kleenendif
736 d6f4ceb7SAndi Kleen
737 606576ceSSteven Rostedtifdef CONFIG_FUNCTION_TRACER
738 c0a80c0cSHeiko Carstensifndef CC_FLAGS_FTRACE
739 c0a80c0cSHeiko CarstensCC_FLAGS_FTRACE := -pg
740 c0a80c0cSHeiko Carstensendif
741 c0a80c0cSHeiko Carstensexport CC_FLAGS_FTRACE
742 a2546faeSSteven Rostedtifdef CONFIG_HAVE_FENTRY
743 a2546faeSSteven RostedtCC_USING_FENTRY	:= $(call cc-option, -mfentry -DCC_USING_FENTRY)
744 a2546faeSSteven Rostedtendif
745 c0a80c0cSHeiko CarstensKBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
746 a2546faeSSteven RostedtKBUILD_AFLAGS	+= $(CC_USING_FENTRY)
747 72441cb1SSteven Rostedtifdef CONFIG_DYNAMIC_FTRACE
748 cf4db259SSteven Rostedt	ifdef CONFIG_HAVE_C_RECORDMCOUNT
749 72441cb1SSteven Rostedt		BUILD_C_RECORDMCOUNT := y
750 72441cb1SSteven Rostedt		export BUILD_C_RECORDMCOUNT
751 72441cb1SSteven Rostedt	endif
752 72441cb1SSteven Rostedtendif
753 16444a8aSArnaldo Carvalho de Meloendif
754 16444a8aSArnaldo Carvalho de Melo
755 91341d4bSSam Ravnborg# We trigger additional mismatches with less inlining
756 91341d4bSSam Ravnborgifdef CONFIG_DEBUG_SECTION_MISMATCH
757 91341d4bSSam RavnborgKBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
758 91341d4bSSam Ravnborgendif
759 91341d4bSSam Ravnborg
760 e8e69931SSam Ravnborg# arch Makefile may override CC so keep this after arch Makefile is included
761 e8f5bdb0SRik van RielNOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
762 e8e69931SSam RavnborgCHECKFLAGS     += $(NOSTDINC_FLAGS)
763 e8e69931SSam Ravnborg
764 1da177e4SLinus Torvalds# warn about C99 declaration after statement
765 a0f97e06SSam RavnborgKBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
766 1da177e4SLinus Torvalds
767 070b98bfSSam Ravnborg# disable pointer signed / unsigned warnings in gcc 4.0
768 8417da6fSMichal MarekKBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
769 1da177e4SLinus Torvalds
770 fe8d0a41SKirill Smelkov# disable invalid "can't wrap" optimizations for signed / pointers
771 a137802eSLinus TorvaldsKBUILD_CFLAGS	+= $(call cc-option,-fno-strict-overflow)
772 d0115552SLinus Torvalds
773 8f7f5c9fSAndi Kleen# conserve stack if available
774 8f7f5c9fSAndi KleenKBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
775 8f7f5c9fSAndi Kleen
776 80970472SSergei Trofimovich# disallow errors like 'EXPORT_GPL(foo);' with missing header
777 80970472SSergei TrofimovichKBUILD_CFLAGS   += $(call cc-option,-Werror=implicit-int)
778 80970472SSergei Trofimovich
779 80970472SSergei Trofimovich# require functions to have arguments in prototypes, not empty 'int foo()'
780 80970472SSergei TrofimovichKBUILD_CFLAGS   += $(call cc-option,-Werror=strict-prototypes)
781 80970472SSergei Trofimovich
782 fe7c36c7SJosh Triplett# Prohibit date/time macros, which would make the build non-deterministic
783 fe7c36c7SJosh TriplettKBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
784 fe7c36c7SJosh Triplett
785 ea8daa7bSDaniel Wagner# enforce correct pointer usage
786 ea8daa7bSDaniel WagnerKBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
787 ea8daa7bSDaniel Wagner
788 40df759eSMichal Marek# use the deterministic mode of AR if available
789 40df759eSMichal MarekKBUILD_ARFLAGS := $(call ar-option,D)
790 40df759eSMichal Marek
791 bf5438fcSJason Baron# check for 'asm goto'
792 bf5438fcSJason Baronifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
793 bf5438fcSJason Baron	KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
794 c0ccf6f9SAnton Blanchard	KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
795 bf5438fcSJason Baronendif
796 bf5438fcSJason Baron
797 a436bb7bSMasahiro Yamadainclude scripts/Makefile.kasan
798 a436bb7bSMasahiro Yamadainclude scripts/Makefile.extrawarn
799 c6d30853SAndrey Ryabinininclude scripts/Makefile.ubsan
800 a86fe353SMasahiro Yamada
801 61754c18SMichal Marek# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
802 61754c18SMichal Marek# last assignments
803 61754c18SMichal MarekKBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
804 61754c18SMichal MarekKBUILD_AFLAGS   += $(ARCH_AFLAGS)   $(KAFLAGS)
805 61754c18SMichal MarekKBUILD_CFLAGS   += $(ARCH_CFLAGS)   $(KCFLAGS)
806 52bcc330SSam Ravnborg
807 18991197SRoland McGrath# Use --build-id when available.
808 18991197SRoland McGrathLDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
809 f86fd306SSam Ravnborg			      $(call cc-ldoption, -Wl$(comma)--build-id,))
810 6588169dSSam RavnborgKBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
811 18991197SRoland McGrathLDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
812 18991197SRoland McGrath
813 5d7d18f5SDavid Howellsifeq ($(CONFIG_STRIP_ASM_SYMS),y)
814 d79a2719SAndi KleenLDFLAGS_vmlinux	+= $(call ld-option, -X,)
815 5d7d18f5SDavid Howellsendif
816 5d7d18f5SDavid Howells
817 1da177e4SLinus Torvalds# Default kernel image to build when no specific target is given.
818 1da177e4SLinus Torvalds# KBUILD_IMAGE may be overruled on the command line or
819 1da177e4SLinus Torvalds# set in the environment
820 1da177e4SLinus Torvalds# Also any assignments in arch/$(ARCH)/Makefile take precedence over
821 1da177e4SLinus Torvalds# this default value
822 1da177e4SLinus Torvaldsexport KBUILD_IMAGE ?= vmlinux
823 1da177e4SLinus Torvalds
824 1da177e4SLinus Torvalds#
825 1da177e4SLinus Torvalds# INSTALL_PATH specifies where to place the updated kernel and system map
826 1da177e4SLinus Torvalds# images. Default is /boot, but you can set it to other values
827 1da177e4SLinus Torvaldsexport	INSTALL_PATH ?= /boot
828 1da177e4SLinus Torvalds
829 1da177e4SLinus Torvalds#
830 f4d4ffc0SJason Cooper# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
831 f4d4ffc0SJason Cooper# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
832 f4d4ffc0SJason Cooper# an argument if needed. Otherwise it defaults to the kernel install path
833 f4d4ffc0SJason Cooper#
834 f4d4ffc0SJason Cooperexport INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
835 f4d4ffc0SJason Cooper
836 f4d4ffc0SJason Cooper#
837 1da177e4SLinus Torvalds# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
838 1da177e4SLinus Torvalds# relocations required by build roots.  This is not defined in the
839 070b98bfSSam Ravnborg# makefile but the argument can be passed to make if needed.
840 1da177e4SLinus Torvalds#
841 1da177e4SLinus Torvalds
842 df9df036SSam RavnborgMODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
843 1da177e4SLinus Torvaldsexport MODLIB
844 1da177e4SLinus Torvalds
845 ac031f26STheodore Ts'o#
846 2ea03891SSam Ravnborg# INSTALL_MOD_STRIP, if defined, will cause modules to be
847 2ea03891SSam Ravnborg# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
848 2ea03891SSam Ravnborg# the default option --strip-debug will be used.  Otherwise,
849 177b241dSGilles Espinasse# INSTALL_MOD_STRIP value will be used as the options to the strip command.
850 2ea03891SSam Ravnborg
851 ac031f26STheodore Ts'oifdef INSTALL_MOD_STRIP
852 ac031f26STheodore Ts'oifeq ($(INSTALL_MOD_STRIP),1)
853 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) --strip-debug
854 ac031f26STheodore Ts'oelse
855 2ea03891SSam Ravnborgmod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
856 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP=1
857 ac031f26STheodore Ts'oelse
858 2ea03891SSam Ravnborgmod_strip_cmd = true
859 ac031f26STheodore Ts'oendif # INSTALL_MOD_STRIP
860 ac031f26STheodore Ts'oexport mod_strip_cmd
861 ac031f26STheodore Ts'o
862 beb50df3SBertrand Jacquin# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
863 beb50df3SBertrand Jacquin# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
864 beb50df3SBertrand Jacquin# or CONFIG_MODULE_COMPRESS_XZ.
865 beb50df3SBertrand Jacquin
866 beb50df3SBertrand Jacquinmod_compress_cmd = true
867 beb50df3SBertrand Jacquinifdef CONFIG_MODULE_COMPRESS
868 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_GZIP
869 3d1450d5SJason A. Donenfeld    mod_compress_cmd = gzip -n -f
870 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_GZIP
871 beb50df3SBertrand Jacquin  ifdef CONFIG_MODULE_COMPRESS_XZ
872 3d1450d5SJason A. Donenfeld    mod_compress_cmd = xz -f
873 beb50df3SBertrand Jacquin  endif # CONFIG_MODULE_COMPRESS_XZ
874 beb50df3SBertrand Jacquinendif # CONFIG_MODULE_COMPRESS
875 beb50df3SBertrand Jacquinexport mod_compress_cmd
876 beb50df3SBertrand Jacquin
877 1bf49dd4SP J P# Select initial ramdisk compression format, default is gzip(1).
878 1bf49dd4SP J P# This shall be used by the dracut(8) tool while creating an initramfs image.
879 1bf49dd4SP J P#
880 7ac18156SJan BeulichINITRD_COMPRESS-y                  := gzip
881 7ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
882 7ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZMA)  := lzma
883 7ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_XZ)    := xz
884 7ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZO)   := lzo
885 7ac18156SJan BeulichINITRD_COMPRESS-$(CONFIG_RD_LZ4)   := lz4
886 b7000adeSLinus Torvalds# do not export INITRD_COMPRESS, since we didn't actually
887 b7000adeSLinus Torvalds# choose a sane default compression above.
888 b7000adeSLinus Torvalds# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
889 1da177e4SLinus Torvalds
890 d9d8d7edSMichal Marekifdef CONFIG_MODULE_SIG_ALL
891 3ee550f1SDavid Woodhouse$(eval $(call config_filename,MODULE_SIG_KEY))
892 3ee550f1SDavid Woodhouse
893 3ee550f1SDavid Woodhousemod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
894 e2a666d5SRusty Russellelse
895 e2a666d5SRusty Russellmod_sign_cmd = true
896 e2a666d5SRusty Russellendif
897 e2a666d5SRusty Russellexport mod_sign_cmd
898 e2a666d5SRusty Russell
899 e2a666d5SRusty Russell
900 1da177e4SLinus Torvaldsifeq ($(KBUILD_EXTMOD),)
901 cfc411e7SDavid Howellscore-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
902 1da177e4SLinus Torvalds
903 1da177e4SLinus Torvaldsvmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
904 1da177e4SLinus Torvalds		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
905 37d9fe47SFeng Wu		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
906 1da177e4SLinus Torvalds
907 1da177e4SLinus Torvaldsvmlinux-alldirs	:= $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
908 37d9fe47SFeng Wu		     $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
909 1da177e4SLinus Torvalds
910 1da177e4SLinus Torvaldsinit-y		:= $(patsubst %/, %/built-in.o, $(init-y))
911 1da177e4SLinus Torvaldscore-y		:= $(patsubst %/, %/built-in.o, $(core-y))
912 1da177e4SLinus Torvaldsdrivers-y	:= $(patsubst %/, %/built-in.o, $(drivers-y))
913 1da177e4SLinus Torvaldsnet-y		:= $(patsubst %/, %/built-in.o, $(net-y))
914 1da177e4SLinus Torvaldslibs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
915 1da177e4SLinus Torvaldslibs-y2		:= $(patsubst %/, %/built-in.o, $(libs-y))
916 1da177e4SLinus Torvaldslibs-y		:= $(libs-y1) $(libs-y2)
917 37d9fe47SFeng Wuvirt-y		:= $(patsubst %/, %/built-in.o, $(virt-y))
918 1da177e4SLinus Torvalds
919 1f2bfbd0SSam Ravnborg# Externally visible symbols (used by link-vmlinux.sh)
920 95698570SSam Ravnborgexport KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
921 37d9fe47SFeng Wuexport KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
922 95698570SSam Ravnborgexport KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
923 1f2bfbd0SSam Ravnborgexport LDFLAGS_vmlinux
924 6615d6c3SMichal Marek# used by scripts/pacmage/Makefile
925 37d9fe47SFeng Wuexport KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
926 1da177e4SLinus Torvalds
927 1f2bfbd0SSam Ravnborgvmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
928 1da177e4SLinus Torvalds
929 1f2bfbd0SSam Ravnborg# Final link of vmlinux
930 1f2bfbd0SSam Ravnborg      cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
931 1f2bfbd0SSam Ravnborgquiet_cmd_link-vmlinux = LINK    $@
932 1da177e4SLinus Torvalds
933 1f2bfbd0SSam Ravnborg# Include targets which we want to
934 1f2bfbd0SSam Ravnborg# execute if the rest of the kernel build went well.
935 1f2bfbd0SSam Ravnborgvmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
936 23121ca2SNicolas Pitreifdef CONFIG_TRIM_UNUSED_KSYMS
937 *ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
938 23121ca2SNicolas Pitre	  "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile autoksyms_recursive"
939 23121ca2SNicolas Pitreendif
940 0f836e5fSDavid Woodhouseifdef CONFIG_HEADERS_CHECK
941 0e7af8d0SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
942 0f836e5fSDavid Woodhouseendif
943 3794f3e8SRandy Dunlapifdef CONFIG_BUILD_DOCSRC
944 3794f3e8SRandy Dunlap	$(Q)$(MAKE) $(build)=Documentation
945 3794f3e8SRandy Dunlapendif
946 3ee7b3faSJan Kiszkaifdef CONFIG_GDB_SCRIPTS
947 3ee7b3faSJan Kiszka	$(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
948 3ee7b3faSJan Kiszkaendif
949 1f2bfbd0SSam Ravnborg	+$(call if_changed,link-vmlinux)
950 741f98feSSam Ravnborg
951 23121ca2SNicolas Pitreautoksyms_recursive: $(vmlinux-deps)
952 *ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
953 23121ca2SNicolas Pitre	  "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile autoksyms_recursive"
954 23121ca2SNicolas PitrePHONY += autoksyms_recursive
955 23121ca2SNicolas Pitre
956 23121ca2SNicolas Pitre# standalone target for easier testing
957 23121ca2SNicolas Pitreinclude/generated/autoksyms.h: FORCE
958 *ba79d401SNicolas Ferre	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
959 23121ca2SNicolas Pitre
960 dd92478aSNicolas Pitre# Build samples along the rest of the kernel
961 dd92478aSNicolas Pitreifdef CONFIG_SAMPLES
962 dd92478aSNicolas Pitrevmlinux-dirs += samples
963 dd92478aSNicolas Pitreendif
964 dd92478aSNicolas Pitre
965 1da177e4SLinus Torvalds# The actual objects are generated when descending,
966 1da177e4SLinus Torvalds# make sure no implicit rule kicks in
967 1f2bfbd0SSam Ravnborg$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
968 1da177e4SLinus Torvalds
969 1da177e4SLinus Torvalds# Handle descending into subdirectories listed in $(vmlinux-dirs)
970 1da177e4SLinus Torvalds# Preset locale variables to speed up the build process. Limit locale
971 1da177e4SLinus Torvalds# tweaks to this spot to avoid wrong language settings when running
972 1da177e4SLinus Torvalds# make menuconfig etc.
973 1da177e4SLinus Torvalds# Error messages still appears in the original language
974 1da177e4SLinus Torvalds
975 4f193362SPaul SmithPHONY += $(vmlinux-dirs)
976 5bb78269SSam Ravnborg$(vmlinux-dirs): prepare scripts
977 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$@
978 1da177e4SLinus Torvalds
979 0d0e7718SMichal Marekdefine filechk_kernel.release
980 0d0e7718SMichal Marek	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
981 0d0e7718SMichal Marekendef
982 0d0e7718SMichal Marek
983 83a35e36SGeert Uytterhoeven# Store (new) KERNELRELEASE string in include/config/kernel.release
984 f1d28fb0SRoman Zippelinclude/config/kernel.release: include/config/auto.conf FORCE
985 0d0e7718SMichal Marek	$(call filechk,kernel.release)
986 cb58455cSSam Ravnborg
987 cb58455cSSam Ravnborg
988 1da177e4SLinus Torvalds# Things we need to do before we recursively start building the kernel
989 5bb78269SSam Ravnborg# or the modules are listed in "prepare".
990 5bb78269SSam Ravnborg# A multi level approach is used. prepareN is processed before prepareN-1.
991 5bb78269SSam Ravnborg# archprepare is used in arch Makefiles and when processed asm symlink,
992 5bb78269SSam Ravnborg# version.h and scripts_basic is processed / created.
993 1da177e4SLinus Torvalds
994 5bb78269SSam Ravnborg# Listed in dependency order
995 4f193362SPaul SmithPHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
996 5bb78269SSam Ravnborg
997 86feeaa8SSam Ravnborg# prepare3 is used to check if we are building in a separate output directory,
998 1da177e4SLinus Torvalds# and if so do:
999 1da177e4SLinus Torvalds# 1) Check that make has not been executed in the kernel src $(srctree)
1000 f1d28fb0SRoman Zippelprepare3: include/config/kernel.release
1001 1da177e4SLinus Torvaldsifneq ($(KBUILD_SRC),)
1002 fd54f502SMike Frysinger	@$(kecho) '  Using $(srctree) as source for kernel'
1003 c955ccafSRoman Zippel	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1004 5369f550SMichal Marek		echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
1005 5369f550SMichal Marek		echo >&2 "  in the '$(srctree)' directory.";\
1006 1da177e4SLinus Torvalds		/bin/false; \
1007 1da177e4SLinus Torvalds	fi;
1008 1da177e4SLinus Torvaldsendif
1009 1da177e4SLinus Torvalds
1010 86feeaa8SSam Ravnborg# prepare2 creates a makefile if using a separate output directory
1011 d8ecc5cdSSam Ravnborgprepare2: prepare3 outputmakefile asm-generic
1012 1da177e4SLinus Torvalds
1013 d183e6f5SDavid Howellsprepare1: prepare2 $(version_h) include/generated/utsrelease.h \
1014 f7f16b77SSam Ravnborg                   include/config/auto.conf
1015 7bb9d092SSam Ravnborg	$(cmd_crmodverdir)
1016 f2355416SNicolas Pitre	$(Q)test -e include/generated/autoksyms.h || \
1017 f2355416SNicolas Pitre	    touch   include/generated/autoksyms.h
1018 1da177e4SLinus Torvalds
1019 6520fe55SH. Peter Anvinarchprepare: archheaders archscripts prepare1 scripts_basic
1020 5bb78269SSam Ravnborg
1021 2e8d696bSMasahiro Yamadaprepare0: archprepare
1022 8d36a623SSam Ravnborg	$(Q)$(MAKE) $(build)=.
1023 86feeaa8SSam Ravnborg
1024 1da177e4SLinus Torvalds# All the preparing..
1025 b9ab5ebbSJosh Poimboeufprepare: prepare0 prepare-objtool
1026 b9ab5ebbSJosh Poimboeuf
1027 3b27a0c8SJosh Poimboeufifdef CONFIG_STACK_VALIDATION
1028 3b27a0c8SJosh Poimboeuf  has_libelf := $(shell echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf - &> /dev/null && echo 1 || echo 0)
1029 3b27a0c8SJosh Poimboeuf  ifeq ($(has_libelf),1)
1030 3b27a0c8SJosh Poimboeuf    objtool_target := tools/objtool FORCE
1031 3b27a0c8SJosh Poimboeuf  else
1032 3b27a0c8SJosh Poimboeuf    $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev or elfutils-libelf-devel")
1033 3b27a0c8SJosh Poimboeuf    SKIP_STACK_VALIDATION := 1
1034 3b27a0c8SJosh Poimboeuf    export SKIP_STACK_VALIDATION
1035 3b27a0c8SJosh Poimboeuf  endif
1036 3b27a0c8SJosh Poimboeufendif
1037 3b27a0c8SJosh Poimboeuf
1038 b9ab5ebbSJosh PoimboeufPHONY += prepare-objtool
1039 3b27a0c8SJosh Poimboeufprepare-objtool: $(objtool_target)
1040 1da177e4SLinus Torvalds
1041 1da177e4SLinus Torvalds# Generate some files
1042 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1043 1da177e4SLinus Torvalds
1044 1da177e4SLinus Torvalds# KERNELRELEASE can change from a few different places, meaning version.h
1045 1da177e4SLinus Torvalds# needs to be updated, so this check is forced on all builds
1046 1da177e4SLinus Torvalds
1047 1da177e4SLinus Torvaldsuts_len := 64
1048 63104eecSSam Ravnborgdefine filechk_utsrelease.h
1049 1da177e4SLinus Torvalds	if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1050 1da177e4SLinus Torvalds	  echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1051 1da177e4SLinus Torvalds	  exit 1;                                                         \
1052 1da177e4SLinus Torvalds	fi;                                                               \
1053 63104eecSSam Ravnborg	(echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1054 1da177e4SLinus Torvaldsendef
1055 1da177e4SLinus Torvalds
1056 63104eecSSam Ravnborgdefine filechk_version.h
1057 63104eecSSam Ravnborg	(echo \#define LINUX_VERSION_CODE $(shell                         \
1058 78d3bb44SMichal Marek	expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1059 63104eecSSam Ravnborg	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1060 63104eecSSam Ravnborgendef
1061 63104eecSSam Ravnborg
1062 d183e6f5SDavid Howells$(version_h): $(srctree)/Makefile FORCE
1063 1da177e4SLinus Torvalds	$(call filechk,version.h)
1064 223c24a7SMichal Marek	$(Q)rm -f $(old_version_h)
1065 1da177e4SLinus Torvalds
1066 273b281fSSam Ravnborginclude/generated/utsrelease.h: include/config/kernel.release FORCE
1067 63104eecSSam Ravnborg	$(call filechk,utsrelease.h)
1068 63104eecSSam Ravnborg
1069 179efcb4SVegard NossumPHONY += headerdep
1070 179efcb4SVegard Nossumheaderdep:
1071 9663d989SPeter Foley	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1072 9663d989SPeter Foley	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
1073 179efcb4SVegard Nossum
1074 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1075 88ecf814SDavid Woodhouse# Firmware install
1076 88ecf814SDavid WoodhouseINSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1077 88ecf814SDavid Woodhouseexport INSTALL_FW_PATH
1078 88ecf814SDavid Woodhouse
1079 88ecf814SDavid WoodhousePHONY += firmware_install
1080 2e8d696bSMasahiro Yamadafirmware_install:
1081 88ecf814SDavid Woodhouse	@mkdir -p $(objtree)/firmware
1082 88ecf814SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1083 88ecf814SDavid Woodhouse
1084 88ecf814SDavid Woodhouse# ---------------------------------------------------------------------------
1085 8d730cfbSDavid Woodhouse# Kernel headers
1086 8d730cfbSDavid Woodhouse
1087 e6883b18SSam Ravnborg#Default location for installed headers
1088 e6883b18SSam Ravnborgexport INSTALL_HDR_PATH = $(objtree)/usr
1089 e6883b18SSam Ravnborg
1090 2fb9b1bdSSam Ravnborg# If we do an all arch process set dst to asm-$(hdr-arch)
1091 2fb9b1bdSSam Ravnborghdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1092 e6883b18SSam Ravnborg
1093 052ad274SH. Peter AnvinPHONY += archheaders
1094 052ad274SH. Peter Anvinarchheaders:
1095 052ad274SH. Peter Anvin
1096 6520fe55SH. Peter AnvinPHONY += archscripts
1097 6520fe55SH. Peter Anvinarchscripts:
1098 6520fe55SH. Peter Anvin
1099 e6883b18SSam RavnborgPHONY += __headers
1100 2e8d696bSMasahiro Yamada__headers: $(version_h) scripts_basic asm-generic archheaders archscripts
1101 e1b702cfSMike Waychison	$(Q)$(MAKE) $(build)=scripts build_unifdef
1102 6d716275SDavid Woodhouse
1103 6d716275SDavid WoodhousePHONY += headers_install_all
1104 2fb9b1bdSSam Ravnborgheaders_install_all:
1105 2fb9b1bdSSam Ravnborg	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1106 6d716275SDavid Woodhouse
1107 8d730cfbSDavid WoodhousePHONY += headers_install
1108 e6883b18SSam Ravnborgheaders_install: __headers
1109 10b63956SDavid Howells	$(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1110 2fb9b1bdSSam Ravnborg	  $(error Headers not exportable for the $(SRCARCH) architecture))
1111 10b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=include/uapi
1112 10b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
1113 8d730cfbSDavid Woodhouse
1114 1f85712eSMike FrysingerPHONY += headers_check_all
1115 1f85712eSMike Frysingerheaders_check_all: headers_install_all
1116 2fb9b1bdSSam Ravnborg	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1117 1f85712eSMike Frysinger
1118 68475359SDavid WoodhousePHONY += headers_check
1119 68475359SDavid Woodhouseheaders_check: headers_install
1120 10b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1121 10b63956SDavid Howells	$(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
1122 68475359SDavid Woodhouse
1123 8d730cfbSDavid Woodhouse# ---------------------------------------------------------------------------
1124 5a5da78bSShuah Khan# Kernel selftest
1125 5a5da78bSShuah Khan
1126 5a5da78bSShuah KhanPHONY += kselftest
1127 5a5da78bSShuah Khankselftest:
1128 5a5da78bSShuah Khan	$(Q)$(MAKE) -C tools/testing/selftests run_tests
1129 5a5da78bSShuah Khan
1130 dcb825a9SWang Longkselftest-clean:
1131 dcb825a9SWang Long	$(Q)$(MAKE) -C tools/testing/selftests clean
1132 dcb825a9SWang Long
1133 3d6dee7aSBamvor Jian ZhangPHONY += kselftest-merge
1134 3d6dee7aSBamvor Jian Zhangkselftest-merge:
1135 3d6dee7aSBamvor Jian Zhang	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1136 3d6dee7aSBamvor Jian Zhang	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1137 3d6dee7aSBamvor Jian Zhang		-m $(objtree)/.config \
1138 3d6dee7aSBamvor Jian Zhang		$(srctree)/tools/testing/selftests/*/config
1139 3d6dee7aSBamvor Jian Zhang	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1140 3d6dee7aSBamvor Jian Zhang
1141 5a5da78bSShuah Khan# ---------------------------------------------------------------------------
1142 1da177e4SLinus Torvalds# Modules
1143 1da177e4SLinus Torvalds
1144 1da177e4SLinus Torvaldsifdef CONFIG_MODULES
1145 1da177e4SLinus Torvalds
1146 1da177e4SLinus Torvalds# By default, build modules as well
1147 1da177e4SLinus Torvalds
1148 73d1393eSMichal Marekall: modules
1149 1da177e4SLinus Torvalds
1150 1da177e4SLinus Torvalds# Build modules
1151 551559e1STejun Heo#
1152 551559e1STejun Heo# A module can be listed more than once in obj-m resulting in
1153 551559e1STejun Heo# duplicate lines in modules.order files.  Those are removed
1154 551559e1STejun Heo# using awk while concatenating to the final file.
1155 1da177e4SLinus Torvalds
1156 4f193362SPaul SmithPHONY += modules
1157 2da30e70SMichal Marekmodules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1158 551559e1STejun Heo	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1159 fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1160 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1161 44463f7dSDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1162 1da177e4SLinus Torvalds
1163 a6c36632SMichal Marekmodules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1164 a6c36632SMichal Marek	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1165 a6c36632SMichal Marek
1166 73d1393eSMichal Marek%/modules.builtin: include/config/auto.conf
1167 a6c36632SMichal Marek	$(Q)$(MAKE) $(modbuiltin)=$*
1168 a6c36632SMichal Marek
1169 1da177e4SLinus Torvalds
1170 1da177e4SLinus Torvalds# Target to prepare building external modules
1171 4f193362SPaul SmithPHONY += modules_prepare
1172 5bb78269SSam Ravnborgmodules_prepare: prepare scripts
1173 1da177e4SLinus Torvalds
1174 1da177e4SLinus Torvalds# Target to install modules
1175 4f193362SPaul SmithPHONY += modules_install
1176 1da177e4SLinus Torvaldsmodules_install: _modinst_ _modinst_post
1177 1da177e4SLinus Torvalds
1178 4f193362SPaul SmithPHONY += _modinst_
1179 2da30e70SMichal Marek_modinst_:
1180 1da177e4SLinus Torvalds	@rm -rf $(MODLIB)/kernel
1181 1da177e4SLinus Torvalds	@rm -f $(MODLIB)/source
1182 1da177e4SLinus Torvalds	@mkdir -p $(MODLIB)/kernel
1183 890676c6SMichal Marek	@ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1184 1da177e4SLinus Torvalds	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1185 1da177e4SLinus Torvalds		rm -f $(MODLIB)/build ; \
1186 7e1c0477SMichal Marek		ln -s $(CURDIR) $(MODLIB)/build ; \
1187 1da177e4SLinus Torvalds	fi
1188 551559e1STejun Heo	@cp -f $(objtree)/modules.order $(MODLIB)/
1189 bc081dd6SMichal Marek	@cp -f $(objtree)/modules.builtin $(MODLIB)/
1190 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1191 1da177e4SLinus Torvalds
1192 50a8ec31SSam Ravnborg# This depmod is only for convenience to give the initial
1193 1da177e4SLinus Torvalds# boot a modules.dep even before / is mounted read-write.  However the
1194 1da177e4SLinus Torvalds# boot script depmod is the master version.
1195 4f193362SPaul SmithPHONY += _modinst_post
1196 6d128e1eSLinus Torvalds_modinst_post: _modinst_
1197 88ecf814SDavid Woodhouse	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1198 50a8ec31SSam Ravnborg	$(call cmd,depmod)
1199 1da177e4SLinus Torvalds
1200 d890f510SJosh Boyerifeq ($(CONFIG_MODULE_SIG), y)
1201 d890f510SJosh BoyerPHONY += modules_sign
1202 d890f510SJosh Boyermodules_sign:
1203 d890f510SJosh Boyer	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1204 d890f510SJosh Boyerendif
1205 d890f510SJosh Boyer
1206 1da177e4SLinus Torvaldselse # CONFIG_MODULES
1207 1da177e4SLinus Torvalds
1208 1da177e4SLinus Torvalds# Modules not configured
1209 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1210 1da177e4SLinus Torvalds
1211 612e47ceSMasahiro YamadaPHONY += modules modules_install
1212 612e47ceSMasahiro Yamadamodules modules_install:
1213 5369f550SMichal Marek	@echo >&2
1214 5369f550SMichal Marek	@echo >&2 "The present kernel configuration has modules disabled."
1215 5369f550SMichal Marek	@echo >&2 "Type 'make config' and enable loadable module support."
1216 5369f550SMichal Marek	@echo >&2 "Then build a kernel with module support enabled."
1217 5369f550SMichal Marek	@echo >&2
1218 1da177e4SLinus Torvalds	@exit 1
1219 1da177e4SLinus Torvalds
1220 1da177e4SLinus Torvaldsendif # CONFIG_MODULES
1221 1da177e4SLinus Torvalds
1222 1da177e4SLinus Torvalds###
1223 1da177e4SLinus Torvalds# Cleaning is done on three levels.
1224 1da177e4SLinus Torvalds# make clean     Delete most generated files
1225 1da177e4SLinus Torvalds#                Leave enough to build external modules
1226 1da177e4SLinus Torvalds# make mrproper  Delete the current configuration, and all generated files
1227 1da177e4SLinus Torvalds# make distclean Remove editor backup files, patch leftover files and the like
1228 1da177e4SLinus Torvalds
1229 1da177e4SLinus Torvalds# Directories & files removed with 'make clean'
1230 1da177e4SLinus TorvaldsCLEAN_DIRS  += $(MODVERDIR)
1231 1da177e4SLinus Torvalds
1232 1da177e4SLinus Torvalds# Directories & files removed with 'make mrproper'
1233 d8ecc5cdSSam RavnborgMRPROPER_DIRS  += include/config usr/include include/generated          \
1234 79192ca8SJason Cooper		  arch/*/include/generated .tmp_objdiff
1235 c22bd32cSMasahiro YamadaMRPROPER_FILES += .config .config.old .version .old_version \
1236 d5b71936SRusty Russell		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1237 fb117949SDavid Woodhouse		  signing_key.pem signing_key.priv signing_key.x509	\
1238 fb117949SDavid Woodhouse		  x509.genkey extra_certificates signing_key.x509.keyid	\
1239 3ee7b3faSJan Kiszka		  signing_key.x509.signer vmlinux-gdb.py
1240 1da177e4SLinus Torvalds
1241 1da177e4SLinus Torvalds# clean - Delete most, but leave enough to build external modules
1242 1da177e4SLinus Torvalds#
1243 1da177e4SLinus Torvaldsclean: rm-dirs  := $(CLEAN_DIRS)
1244 1da177e4SLinus Torvaldsclean: rm-files := $(CLEAN_FILES)
1245 fb68d4beSGerard Snitselaarclean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1246 1da177e4SLinus Torvalds
1247 bd1ee804SPawel MollPHONY += $(clean-dirs) clean archclean vmlinuxclean
1248 1da177e4SLinus Torvalds$(clean-dirs):
1249 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1250 1da177e4SLinus Torvalds
1251 bd1ee804SPawel Mollvmlinuxclean:
1252 bd1ee804SPawel Moll	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1253 bd1ee804SPawel Moll
1254 bd1ee804SPawel Mollclean: archclean vmlinuxclean
1255 1da177e4SLinus Torvalds
1256 1da177e4SLinus Torvalds# mrproper - Delete all generated files, including .config
1257 1da177e4SLinus Torvalds#
1258 1da177e4SLinus Torvaldsmrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1259 1da177e4SLinus Torvaldsmrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1260 1da177e4SLinus Torvaldsmrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1261 1da177e4SLinus Torvalds
1262 4f193362SPaul SmithPHONY += $(mrproper-dirs) mrproper archmrproper
1263 1da177e4SLinus Torvalds$(mrproper-dirs):
1264 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1265 1da177e4SLinus Torvalds
1266 1da177e4SLinus Torvaldsmrproper: clean archmrproper $(mrproper-dirs)
1267 1da177e4SLinus Torvalds	$(call cmd,rmdirs)
1268 1da177e4SLinus Torvalds	$(call cmd,rmfiles)
1269 1da177e4SLinus Torvalds
1270 1da177e4SLinus Torvalds# distclean
1271 1da177e4SLinus Torvalds#
1272 4f193362SPaul SmithPHONY += distclean
1273 1da177e4SLinus Torvalds
1274 1da177e4SLinus Torvaldsdistclean: mrproper
1275 1da177e4SLinus Torvalds	@find $(srctree) $(RCS_FIND_IGNORE) \
1276 1da177e4SLinus Torvalds		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1277 1da177e4SLinus Torvalds		-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1278 a03fcb50SMasahiro Yamada		-o -name '.*.rej' -o -name '*%'  -o -name 'core' \) \
1279 1da177e4SLinus Torvalds		-type f -print | xargs rm -f
1280 1da177e4SLinus Torvalds
1281 1da177e4SLinus Torvalds
1282 1da177e4SLinus Torvalds# Packaging of the kernel to various formats
1283 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1284 1da177e4SLinus Torvalds# rpm target kept for backward compatibility
1285 c79624c1SMichal Marekpackage-dir	:= scripts/package
1286 1da177e4SLinus Torvalds
1287 bafb6747SArnaldo Carvalho de Melo%src-pkg: FORCE
1288 bafb6747SArnaldo Carvalho de Melo	$(Q)$(MAKE) $(build)=$(package-dir) $@
1289 031ecc6dSZach Brown%pkg: include/config/kernel.release FORCE
1290 6c2133e1SSam Ravnborg	$(Q)$(MAKE) $(build)=$(package-dir) $@
1291 031ecc6dSZach Brownrpm: include/config/kernel.release FORCE
1292 6c2133e1SSam Ravnborg	$(Q)$(MAKE) $(build)=$(package-dir) $@
1293 1da177e4SLinus Torvalds
1294 1da177e4SLinus Torvalds
1295 1da177e4SLinus Torvalds# Brief documentation of the typical targets used
1296 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1297 1da177e4SLinus Torvalds
1298 5dffbe81SSegher Boessenkoolboards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1299 a1e7b7bbSKonstantin Khlebnikovboards := $(sort $(notdir $(boards)))
1300 5dffbe81SSegher Boessenkoolboard-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1301 5dffbe81SSegher Boessenkoolboard-dirs := $(sort $(notdir $(board-dirs:/=)))
1302 1da177e4SLinus Torvalds
1303 fe69b420SMasahiro YamadaPHONY += help
1304 1da177e4SLinus Torvaldshelp:
1305 1da177e4SLinus Torvalds	@echo  'Cleaning targets:'
1306 5ea084efSSamuel Tardieu	@echo  '  clean		  - Remove most generated files but keep the config and'
1307 5cc8d246SJesper Juhl	@echo  '                    enough build support to build external modules'
1308 5ea084efSSamuel Tardieu	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
1309 5cc8d246SJesper Juhl	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
1310 1da177e4SLinus Torvalds	@echo  ''
1311 1da177e4SLinus Torvalds	@echo  'Configuration targets:'
1312 1da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1313 1da177e4SLinus Torvalds	@echo  ''
1314 1da177e4SLinus Torvalds	@echo  'Other generic targets:'
1315 1da177e4SLinus Torvalds	@echo  '  all		  - Build all targets marked with [*]'
1316 1da177e4SLinus Torvalds	@echo  '* vmlinux	  - Build the bare kernel'
1317 1da177e4SLinus Torvalds	@echo  '* modules	  - Build all modules'
1318 9cc5d74cSBodo Eggert	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1319 88ecf814SDavid Woodhouse	@echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1320 88ecf814SDavid Woodhouse	@echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1321 1da177e4SLinus Torvalds	@echo  '  dir/            - Build all files in dir and below'
1322 40ab87a4SWang YanQing	@echo  '  dir/file.[ois]  - Build specified target only'
1323 62718979SJoe Perches	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
1324 62718979SJoe Perches	@echo  '                    (requires a recent binutils and recent build (System.map))'
1325 155ad605SSam Ravnborg	@echo  '  dir/file.ko     - Build module including final link'
1326 c4d5ee67SRobert P. J. Day	@echo  '  modules_prepare - Set up for building external modules'
1327 1da177e4SLinus Torvalds	@echo  '  tags/TAGS	  - Generate tags file for editors'
1328 1da177e4SLinus Torvalds	@echo  '  cscope	  - Generate cscope index'
1329 f4ed1009SJianbin Kang	@echo  '  gtags           - Generate GNU GLOBAL index'
1330 3f1d9a6cSMichal Marek	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
1331 3f1d9a6cSMichal Marek	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
1332 3f1d9a6cSMichal Marek	@echo  '  image_name	  - Output the image name (use with make -s)'
1333 2fb9b1bdSSam Ravnborg	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1334 59df3230SGeert Uytterhoeven	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1335 2fb9b1bdSSam Ravnborg	 echo  ''
1336 1da177e4SLinus Torvalds	@echo  'Static analysers'
1337 1da177e4SLinus Torvalds	@echo  '  checkstack      - Generate a list of stack hogs'
1338 1da177e4SLinus Torvalds	@echo  '  namespacecheck  - Name space analysis on compiled kernel'
1339 aa025e7dSSam Ravnborg	@echo  '  versioncheck    - Sanity check on version.h usage'
1340 ec2d987fSRandy Dunlap	@echo  '  includecheck    - Check for duplicate included header files'
1341 295ac051SAdrian Bunk	@echo  '  export_report   - List the usages of all exported symbols'
1342 179efcb4SVegard Nossum	@echo  '  headers_check   - Sanity check on exported headers'
1343 74425eeeSNicolas Palix	@echo  '  headerdep       - Detect inclusion cycles in headers'
1344 74425eeeSNicolas Palix	@$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1345 74425eeeSNicolas Palix	@echo  ''
1346 5a5da78bSShuah Khan	@echo  'Kernel selftest'
1347 5a5da78bSShuah Khan	@echo  '  kselftest       - Build and run kernel selftest (run as root)'
1348 5a5da78bSShuah Khan	@echo  '                    Build, install, and boot kernel before'
1349 5a5da78bSShuah Khan	@echo  '                    running kselftest on it'
1350 dcb825a9SWang Long	@echo  '  kselftest-clean - Remove all generated kselftest files'
1351 3d6dee7aSBamvor Jian Zhang	@echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existed'
1352 3d6dee7aSBamvor Jian Zhang	@echo  '                    .config.'
1353 5a5da78bSShuah Khan	@echo  ''
1354 1da177e4SLinus Torvalds	@echo  'Kernel packaging:'
1355 6c2133e1SSam Ravnborg	@$(MAKE) $(build)=$(package-dir) help
1356 1da177e4SLinus Torvalds	@echo  ''
1357 1da177e4SLinus Torvalds	@echo  'Documentation targets:'
1358 1da177e4SLinus Torvalds	@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1359 1da177e4SLinus Torvalds	@echo  ''
1360 01dee188SAndres Salomon	@echo  'Architecture specific targets ($(SRCARCH)):'
1361 1da177e4SLinus Torvalds	@$(if $(archhelp),$(archhelp),\
1362 01dee188SAndres Salomon		echo '  No architecture specific help defined for $(SRCARCH)')
1363 1da177e4SLinus Torvalds	@echo  ''
1364 1da177e4SLinus Torvalds	@$(if $(boards), \
1365 1da177e4SLinus Torvalds		$(foreach b, $(boards), \
1366 1da177e4SLinus Torvalds		printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1367 1da177e4SLinus Torvalds		echo '')
1368 5dffbe81SSegher Boessenkool	@$(if $(board-dirs), \
1369 5dffbe81SSegher Boessenkool		$(foreach b, $(board-dirs), \
1370 5dffbe81SSegher Boessenkool		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1371 5dffbe81SSegher Boessenkool		printf "  %-16s - Show all of the above\\n" help-boards; \
1372 5dffbe81SSegher Boessenkool		echo '')
1373 1da177e4SLinus Torvalds
1374 1da177e4SLinus Torvalds	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1375 45d506bdSSam Ravnborg	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1376 1da177e4SLinus Torvalds	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1377 701842e3SDustin Kirkland	@echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1378 701842e3SDustin Kirkland	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1379 af07ce3eSIngo Molnar	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1380 28bc20dcSSam Ravnborg	@echo  '  make W=n   [targets] Enable extra gcc checks, n=1,2,3 where'
1381 28bc20dcSSam Ravnborg	@echo  '		1: warnings which may be relevant and do not occur too often'
1382 28bc20dcSSam Ravnborg	@echo  '		2: warnings which occur quite often but may still be relevant'
1383 28bc20dcSSam Ravnborg	@echo  '		3: more obscure warnings, can most likely be ignored'
1384 a6de553dSMichal Marek	@echo  '		Multiple levels can be combined with W=12 or W=123'
1385 1da177e4SLinus Torvalds	@echo  ''
1386 1da177e4SLinus Torvalds	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
1387 1da177e4SLinus Torvalds	@echo  'For further info see the ./README file'
1388 1da177e4SLinus Torvalds
1389 1da177e4SLinus Torvalds
1390 5dffbe81SSegher Boessenkoolhelp-board-dirs := $(addprefix help-,$(board-dirs))
1391 5dffbe81SSegher Boessenkool
1392 5dffbe81SSegher Boessenkoolhelp-boards: $(help-board-dirs)
1393 5dffbe81SSegher Boessenkool
1394 fbae4d58SMichal Marekboards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1395 5dffbe81SSegher Boessenkool
1396 5dffbe81SSegher Boessenkool$(help-board-dirs): help-%:
1397 5dffbe81SSegher Boessenkool	@echo  'Architecture specific targets ($(SRCARCH) $*):'
1398 5dffbe81SSegher Boessenkool	@$(if $(boards-per-dir), \
1399 5dffbe81SSegher Boessenkool		$(foreach b, $(boards-per-dir), \
1400 5dffbe81SSegher Boessenkool		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1401 5dffbe81SSegher Boessenkool		echo '')
1402 5dffbe81SSegher Boessenkool
1403 5dffbe81SSegher Boessenkool
1404 1da177e4SLinus Torvalds# Documentation targets
1405 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1406 1da177e4SLinus Torvalds%docs: scripts_basic FORCE
1407 b479bfd0SBen Hutchings	$(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
1408 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=Documentation/DocBook $@
1409 1da177e4SLinus Torvalds
1410 1da177e4SLinus Torvaldselse # KBUILD_EXTMOD
1411 1da177e4SLinus Torvalds
1412 1da177e4SLinus Torvalds###
1413 1da177e4SLinus Torvalds# External module support.
1414 1da177e4SLinus Torvalds# When building external modules the kernel used as basis is considered
1415 1da177e4SLinus Torvalds# read-only, and no consistency checks are made and the make
1416 1da177e4SLinus Torvalds# system is not used on the basis kernel. If updates are required
1417 1da177e4SLinus Torvalds# in the basis kernel ordinary make commands (without M=...) must
1418 1da177e4SLinus Torvalds# be used.
1419 1da177e4SLinus Torvalds#
1420 1da177e4SLinus Torvalds# The following are the only valid targets when building external
1421 1da177e4SLinus Torvalds# modules.
1422 1da177e4SLinus Torvalds# make M=dir clean     Delete all automatically generated files
1423 1da177e4SLinus Torvalds# make M=dir modules   Make all modules in specified dir
1424 1da177e4SLinus Torvalds# make M=dir	       Same as 'make M=dir modules'
1425 1da177e4SLinus Torvalds# make M=dir modules_install
1426 070b98bfSSam Ravnborg#                      Install the modules built in the module directory
1427 1da177e4SLinus Torvalds#                      Assumes install directory is already created
1428 1da177e4SLinus Torvalds
1429 1da177e4SLinus Torvalds# We are always building modules
1430 1da177e4SLinus TorvaldsKBUILD_MODULES := 1
1431 4f193362SPaul SmithPHONY += crmodverdir
1432 1da177e4SLinus Torvaldscrmodverdir:
1433 7bb9d092SSam Ravnborg	$(cmd_crmodverdir)
1434 1da177e4SLinus Torvalds
1435 4f193362SPaul SmithPHONY += $(objtree)/Module.symvers
1436 1da177e4SLinus Torvalds$(objtree)/Module.symvers:
1437 1da177e4SLinus Torvalds	@test -e $(objtree)/Module.symvers || ( \
1438 1da177e4SLinus Torvalds	echo; \
1439 1da177e4SLinus Torvalds	echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1440 1da177e4SLinus Torvalds	echo "           is missing; modules will have no dependencies and modversions."; \
1441 1da177e4SLinus Torvalds	echo )
1442 1da177e4SLinus Torvalds
1443 1da177e4SLinus Torvaldsmodule-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1444 4f193362SPaul SmithPHONY += $(module-dirs) modules
1445 1da177e4SLinus Torvalds$(module-dirs): crmodverdir $(objtree)/Module.symvers
1446 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1447 1da177e4SLinus Torvalds
1448 1da177e4SLinus Torvaldsmodules: $(module-dirs)
1449 fd54f502SMike Frysinger	@$(kecho) '  Building modules, stage 2.';
1450 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1451 1da177e4SLinus Torvalds
1452 4f193362SPaul SmithPHONY += modules_install
1453 a67dc21aSSam Ravnborgmodules_install: _emodinst_ _emodinst_post
1454 a67dc21aSSam Ravnborg
1455 a67dc21aSSam Ravnborginstall-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1456 4f193362SPaul SmithPHONY += _emodinst_
1457 a67dc21aSSam Ravnborg_emodinst_:
1458 a67dc21aSSam Ravnborg	$(Q)mkdir -p $(MODLIB)/$(install-dir)
1459 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1460 1da177e4SLinus Torvalds
1461 4f193362SPaul SmithPHONY += _emodinst_post
1462 a67dc21aSSam Ravnborg_emodinst_post: _emodinst_
1463 a67dc21aSSam Ravnborg	$(call cmd,depmod)
1464 a67dc21aSSam Ravnborg
1465 1da177e4SLinus Torvaldsclean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1466 1da177e4SLinus Torvalds
1467 4f193362SPaul SmithPHONY += $(clean-dirs) clean
1468 1da177e4SLinus Torvalds$(clean-dirs):
1469 1da177e4SLinus Torvalds	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1470 1da177e4SLinus Torvalds
1471 1da177e4SLinus Torvaldsclean:	rm-dirs := $(MODVERDIR)
1472 88d7be03SMichal Marekclean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1473 1da177e4SLinus Torvalds
1474 fe69b420SMasahiro YamadaPHONY += help
1475 1da177e4SLinus Torvaldshelp:
1476 1da177e4SLinus Torvalds	@echo  '  Building external modules.'
1477 1da177e4SLinus Torvalds	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1478 1da177e4SLinus Torvalds	@echo  ''
1479 1da177e4SLinus Torvalds	@echo  '  modules         - default target, build the module(s)'
1480 1da177e4SLinus Torvalds	@echo  '  modules_install - install the module'
1481 1da177e4SLinus Torvalds	@echo  '  clean           - remove generated files in module directory only'
1482 1da177e4SLinus Torvalds	@echo  ''
1483 06300b21SSam Ravnborg
1484 06300b21SSam Ravnborg# Dummies...
1485 4f193362SPaul SmithPHONY += prepare scripts
1486 06300b21SSam Ravnborgprepare: ;
1487 06300b21SSam Ravnborgscripts: ;
1488 1da177e4SLinus Torvaldsendif # KBUILD_EXTMOD
1489 1da177e4SLinus Torvalds
1490 88d7be03SMichal Marekclean: $(clean-dirs)
1491 88d7be03SMichal Marek	$(call cmd,rmdirs)
1492 88d7be03SMichal Marek	$(call cmd,rmfiles)
1493 43f67c98SKevin Cernekee	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1494 88d7be03SMichal Marek		\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1495 addbcdbbSDavid Howells		-o -name '*.ko.*' \
1496 866ced95SAndi Kleen		-o -name '*.dwo'  \
1497 d523b255SRasmus Villemoes		-o -name '*.su'  \
1498 88d7be03SMichal Marek		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1499 88d7be03SMichal Marek		-o -name '*.symtypes' -o -name 'modules.order' \
1500 88d7be03SMichal Marek		-o -name modules.builtin -o -name '.tmp_*.o.*' \
1501 88d7be03SMichal Marek		-o -name '*.gcno' \) -type f -print | xargs rm -f
1502 88d7be03SMichal Marek
1503 1da177e4SLinus Torvalds# Generate tags for editors
1504 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1505 a680eedcSSam Ravnborgquiet_cmd_tags = GEN     $@
1506 a680eedcSSam Ravnborg      cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1507 1da177e4SLinus Torvalds
1508 f4ed1009SJianbin Kangtags TAGS cscope gtags: FORCE
1509 1da177e4SLinus Torvalds	$(call cmd,tags)
1510 1da177e4SLinus Torvalds
1511 1da177e4SLinus Torvalds# Scripts to check various things for consistency
1512 1da177e4SLinus Torvalds# ---------------------------------------------------------------------------
1513 1da177e4SLinus Torvalds
1514 279f3dd3SPeter FoleyPHONY += includecheck versioncheck coccicheck namespacecheck export_report
1515 279f3dd3SPeter Foley
1516 1da177e4SLinus Torvaldsincludecheck:
1517 436f876cSPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1518 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1519 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1520 1da177e4SLinus Torvalds
1521 1da177e4SLinus Torvaldsversioncheck:
1522 2ee2d292SPeter Foley	find $(srctree)/* $(RCS_FIND_IGNORE) \
1523 1da177e4SLinus Torvalds		-name '*.[hcS]' -type f -print | sort \
1524 80007434SGeert Uytterhoeven		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1525 1da177e4SLinus Torvalds
1526 74425eeeSNicolas Palixcoccicheck:
1527 74425eeeSNicolas Palix	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1528 74425eeeSNicolas Palix
1529 1da177e4SLinus Torvaldsnamespacecheck:
1530 1da177e4SLinus Torvalds	$(PERL) $(srctree)/scripts/namespace.pl
1531 1da177e4SLinus Torvalds
1532 295ac051SAdrian Bunkexport_report:
1533 295ac051SAdrian Bunk	$(PERL) $(srctree)/scripts/export_report.pl
1534 295ac051SAdrian Bunk
1535 1da177e4SLinus Torvaldsendif #ifeq ($(config-targets),1)
1536 1da177e4SLinus Torvaldsendif #ifeq ($(mixed-targets),1)
1537 1da177e4SLinus Torvalds
1538 c398ff00SMike MarciniszynPHONY += checkstack kernelrelease kernelversion image_name
1539 e3ccf6e3SJeff Dike
1540 011e3a9aSJeff Dike# UML needs a little special treatment here.  It wants to use the host
1541 011e3a9aSJeff Dike# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1542 011e3a9aSJeff Dike# else wants $(ARCH), including people doing cross-builds, which means
1543 011e3a9aSJeff Dike# that $(SUBARCH) doesn't work here.
1544 011e3a9aSJeff Dikeifeq ($(ARCH), um)
1545 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(SUBARCH)
1546 011e3a9aSJeff Dikeelse
1547 011e3a9aSJeff DikeCHECKSTACK_ARCH := $(ARCH)
1548 011e3a9aSJeff Dikeendif
1549 1da177e4SLinus Torvaldscheckstack:
1550 1da177e4SLinus Torvalds	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1551 011e3a9aSJeff Dike	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1552 1da177e4SLinus Torvalds
1553 7b8ea53dSAmerigo Wangkernelrelease:
1554 7b8ea53dSAmerigo Wang	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1555 01ab1788SAmerigo Wang
1556 cb58455cSSam Ravnborgkernelversion:
1557 2244cbd8SSam Ravnborg	@echo $(KERNELVERSION)
1558 1da177e4SLinus Torvalds
1559 c398ff00SMike Marciniszynimage_name:
1560 c398ff00SMike Marciniszyn	@echo $(KBUILD_IMAGE)
1561 c398ff00SMike Marciniszyn
1562 ea01fa9fSBorislav Petkov# Clear a bunch of variables before executing the submake
1563 ea01fa9fSBorislav Petkovtools/: FORCE
1564 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1565 e17cf3a8SJosh Poimboeuf	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
1566 ea01fa9fSBorislav Petkov
1567 ea01fa9fSBorislav Petkovtools/%: FORCE
1568 bf35182fSDavid Howells	$(Q)mkdir -p $(objtree)/tools
1569 e17cf3a8SJosh Poimboeuf	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
1570 ea01fa9fSBorislav Petkov
1571 06300b21SSam Ravnborg# Single targets
1572 06300b21SSam Ravnborg# ---------------------------------------------------------------------------
1573 bc2546a6SSam Ravnborg# Single targets are compatible with:
1574 e1b8513dSRobert P. J. Day# - build with mixed source and output
1575 bc2546a6SSam Ravnborg# - build with separate output dir 'make O=...'
1576 bc2546a6SSam Ravnborg# - external modules
1577 bc2546a6SSam Ravnborg#
1578 bc2546a6SSam Ravnborg#  target-dir => where to store outputfile
1579 bc2546a6SSam Ravnborg#  build-dir  => directory in kernel source tree to use
1580 06300b21SSam Ravnborg
1581 06300b21SSam Ravnborgifeq ($(KBUILD_EXTMOD),)
1582 aa360879SSam Ravnborg        build-dir  = $(patsubst %/,%,$(dir $@))
1583 bc2546a6SSam Ravnborg        target-dir = $(dir $@)
1584 06300b21SSam Ravnborgelse
1585 06300b21SSam Ravnborg        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1586 bc2546a6SSam Ravnborg        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1587 bc2546a6SSam Ravnborg        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1588 06300b21SSam Ravnborgendif
1589 06300b21SSam Ravnborg
1590 bc2546a6SSam Ravnborg%.s: %.c prepare scripts FORCE
1591 bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1592 bc2546a6SSam Ravnborg%.i: %.c prepare scripts FORCE
1593 bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1594 bc2546a6SSam Ravnborg%.o: %.c prepare scripts FORCE
1595 bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1596 bc2546a6SSam Ravnborg%.lst: %.c prepare scripts FORCE
1597 bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1598 bc2546a6SSam Ravnborg%.s: %.S prepare scripts FORCE
1599 bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1600 bc2546a6SSam Ravnborg%.o: %.S prepare scripts FORCE
1601 bc2546a6SSam Ravnborg	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1602 15fde675SAndreas Gruenbacher%.symtypes: %.c prepare scripts FORCE
1603 15fde675SAndreas Gruenbacher	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1604 bc2546a6SSam Ravnborg
1605 bc2546a6SSam Ravnborg# Modules
1606 31110ebbSSam Ravnborg/: prepare scripts FORCE
1607 31110ebbSSam Ravnborg	$(cmd_crmodverdir)
1608 31110ebbSSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1609 31110ebbSSam Ravnborg	$(build)=$(build-dir)
1610 8e2faea8SPeter Foley# Make sure the latest headers are built for Documentation
1611 8e2faea8SPeter FoleyDocumentation/: headers_install
1612 31110ebbSSam Ravnborg%/: prepare scripts FORCE
1613 7bb9d092SSam Ravnborg	$(cmd_crmodverdir)
1614 06300b21SSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1615 bc2546a6SSam Ravnborg	$(build)=$(build-dir)
1616 bc2546a6SSam Ravnborg%.ko: prepare scripts FORCE
1617 7bb9d092SSam Ravnborg	$(cmd_crmodverdir)
1618 06300b21SSam Ravnborg	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1619 bc2546a6SSam Ravnborg	$(build)=$(build-dir) $(@:.ko=.o)
1620 b805aa0eSSam Ravnborg	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1621 06300b21SSam Ravnborg
1622 1da177e4SLinus Torvalds# FIXME Should go into a make.lib or something
1623 1da177e4SLinus Torvalds# ===========================================================================
1624 1da177e4SLinus Torvalds
1625 1da177e4SLinus Torvaldsquiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1626 1da177e4SLinus Torvalds      cmd_rmdirs = rm -rf $(rm-dirs)
1627 1da177e4SLinus Torvalds
1628 1da177e4SLinus Torvaldsquiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1629 1da177e4SLinus Torvalds      cmd_rmfiles = rm -f $(rm-files)
1630 1da177e4SLinus Torvalds
1631 bc3c26feSUwe Kleine-König# Run depmod only if we have System.map and depmod is executable
1632 50a8ec31SSam Ravnborgquiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1633 569658ddSMichal Marek      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1634 b92021b0SRusty Russell                   $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1635 50a8ec31SSam Ravnborg
1636 7bb9d092SSam Ravnborg# Create temporary dir for module support files
1637 ab19f879SSam Ravnborg# clean it up only when building all modules
1638 ab19f879SSam Ravnborgcmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1639 ab19f879SSam Ravnborg                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1640 1da177e4SLinus Torvalds
1641 1da177e4SLinus Torvalds# read all saved command lines
1642 1da177e4SLinus Torvalds
1643 1da177e4SLinus Torvaldstargets := $(wildcard $(sort $(targets)))
1644 1da177e4SLinus Torvaldscmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1645 1da177e4SLinus Torvalds
1646 1da177e4SLinus Torvaldsifneq ($(cmd_files),)
1647 1da177e4SLinus Torvalds  $(cmd_files): ;	# Do not try to update included dependency files
1648 1da177e4SLinus Torvalds  include $(cmd_files)
1649 1da177e4SLinus Torvaldsendif
1650 1da177e4SLinus Torvalds
1651 1da177e4SLinus Torvaldsendif	# skip-makefile
1652 1da177e4SLinus Torvalds
1653 4f193362SPaul SmithPHONY += FORCE
1654 1da177e4SLinus TorvaldsFORCE:
1655 4f193362SPaul Smith
1656 4f193362SPaul Smith# Declare the contents of the .PHONY variable as phony.  We keep that
1657 fe8d0a41SKirill Smelkov# information in a variable so we can use it in if_changed and friends.
1658 4f193362SPaul Smith.PHONY: $(PHONY)
1659