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c517d838 1VERSION = 4
8005c49d 2PATCHLEVEL = 4
55922c9d 3SUBLEVEL = 0
8005c49d 4EXTRAVERSION = -rc1
25cb62b7 5NAME = Blurry Fish Butt
1da177e4
LT
6
7# *DOCUMENTATION*
8# To see a list of typical targets execute "make help"
9# More info can be located in ./README
10# Comments in this file are targeted only to the developer, do not
11# expect to learn how to build the kernel reading this file.
12
a436bb7b
MY
13# o Do not use make's built-in rules and variables
14# (this increases performance and avoids hard-to-debug behaviour);
15# o Look for make include files relative to root of kernel src
16MAKEFLAGS += -rR --include-dir=$(CURDIR)
1da177e4 17
c051346b 18# Avoid funny character set dependencies
06b5dc64 19unexport LC_ALL
c051346b
PA
20LC_COLLATE=C
21LC_NUMERIC=C
07105202 22export LC_COLLATE LC_NUMERIC
c051346b 23
ab7474ea
BP
24# Avoid interference with shell env settings
25unexport GREP_OPTIONS
26
1da177e4
LT
27# We are using a recursive build, so we need to do a little thinking
28# to get the ordering right.
29#
30# Most importantly: sub-Makefiles should only ever modify files in
31# their own directory. If in some directory we have a dependency on
32# a file in another dir (which doesn't happen often, but it's often
33# unavoidable when linking the built-in.o targets which finally
34# turn into vmlinux), we will call a sub make in that other dir, and
35# after that we are sure that everything which is in that other dir
36# is now up to date.
37#
38# The only cases where we need to modify files which have global
39# effects are thus separated out and done before the recursive
40# descending is started. They are now explicitly listed as the
41# prepare rule.
42
066b7ed9
MM
43# Beautify output
44# ---------------------------------------------------------------------------
45#
46# Normally, we echo the whole command before executing it. By making
47# that echo $($(quiet)$(cmd)), we now have the possibility to set
48# $(quiet) to choose other forms of output instead, e.g.
49#
50# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
51# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
52#
53# If $(quiet) is empty, the whole command will be printed.
54# If it is set to "quiet_", only the short version will be printed.
55# If it is set to "silent_", nothing will be printed at all, since
56# the variable $(silent_cmd_cc_o_c) doesn't exist.
57#
58# A simple variant is to prefix commands with $(Q) - that's useful
59# for commands that shall be hidden in non-verbose mode.
60#
61# $(Q)ln $@ :<
62#
63# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
64# If KBUILD_VERBOSE equals 1 then the above command is displayed.
65#
1da177e4
LT
66# To put more focus on warnings, be less verbose as default
67# Use 'make V=1' to see the full commands
68
b8b0618c
CR
69ifeq ("$(origin V)", "command line")
70 KBUILD_VERBOSE = $(V)
1da177e4
LT
71endif
72ifndef KBUILD_VERBOSE
73 KBUILD_VERBOSE = 0
74endif
75
066b7ed9
MM
76ifeq ($(KBUILD_VERBOSE),1)
77 quiet =
78 Q =
79else
80 quiet=quiet_
81 Q = @
82endif
83
84# If the user is running make -s (silent mode), suppress echoing of
85# commands
86
87ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
88ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
89 quiet=silent_
90endif
91else # make-3.8x
92ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
93 quiet=silent_
94endif
95endif
96
97export quiet Q KBUILD_VERBOSE
98
1da177e4
LT
99# kbuild supports saving output files in a separate directory.
100# To locate output files in a separate directory two syntaxes are supported.
101# In both cases the working directory must be the root of the kernel src.
102# 1) O=
103# Use "make O=dir/to/store/output/files/"
070b98bf 104#
1da177e4
LT
105# 2) Set KBUILD_OUTPUT
106# Set the environment variable KBUILD_OUTPUT to point to the directory
107# where the output files shall be placed.
108# export KBUILD_OUTPUT=dir/to/store/output/files/
109# make
110#
111# The O= assignment takes precedence over the KBUILD_OUTPUT environment
112# variable.
113
1da177e4
LT
114# KBUILD_SRC is set on invocation of make in OBJ directory
115# KBUILD_SRC is not intended to be used by the regular user (for now)
116ifeq ($(KBUILD_SRC),)
117
118# OK, Make called in directory where kernel src resides
119# Do we want to locate output files in a separate directory?
b8b0618c
CR
120ifeq ("$(origin O)", "command line")
121 KBUILD_OUTPUT := $(O)
1da177e4
LT
122endif
123
124# That's our default target when none is given on the command line
4f193362 125PHONY := _all
1da177e4
LT
126_all:
127
1cacc9ab
SR
128# Cancel implicit rules on top Makefile
129$(CURDIR)/Makefile Makefile: ;
130
1da177e4
LT
131ifneq ($(KBUILD_OUTPUT),)
132# Invoke a second make in the output directory, passing relevant variables
133# check that the output directory actually exists
134saved-output := $(KBUILD_OUTPUT)
1c9e70a5
MY
135KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
136 && /bin/pwd)
1da177e4 137$(if $(KBUILD_OUTPUT),, \
1c9e70a5 138 $(error failed to create output directory "$(saved-output)"))
1da177e4 139
0b35786d
MM
140PHONY += $(MAKECMDGOALS) sub-make
141
1cacc9ab 142$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
16f89098 143 @:
0b35786d
MM
144
145sub-make: FORCE
745a2543 146 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
aa55c8e2 147 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
1da177e4
LT
148
149# Leave processing to above invocation of make
150skip-makefile := 1
151endif # ifneq ($(KBUILD_OUTPUT),)
152endif # ifeq ($(KBUILD_SRC),)
153
154# We process the rest of the Makefile if this is the final invocation of make
155ifeq ($(skip-makefile),)
156
7ff52571
MY
157# Do not print "Entering directory ...",
158# but we want to display it when entering to the output directory
159# so that IDEs/editors are able to understand relative filenames.
160MAKEFLAGS += --no-print-directory
161
aa55c8e2
MY
162# Call a source code checker (by default, "sparse") as part of the
163# C compilation.
164#
165# Use 'make C=1' to enable checking of only re-compiled files.
166# Use 'make C=2' to enable checking of *all* source files, regardless
167# of whether they are re-compiled or not.
168#
169# See the file "Documentation/sparse.txt" for more details, including
170# where to get the "sparse" utility.
171
172ifeq ("$(origin C)", "command line")
173 KBUILD_CHECKSRC = $(C)
174endif
175ifndef KBUILD_CHECKSRC
176 KBUILD_CHECKSRC = 0
177endif
178
179# Use make M=dir to specify directory of external module to build
180# Old syntax make ... SUBDIRS=$PWD is still supported
181# Setting the environment variable KBUILD_EXTMOD take precedence
182ifdef SUBDIRS
183 KBUILD_EXTMOD ?= $(SUBDIRS)
184endif
185
186ifeq ("$(origin M)", "command line")
187 KBUILD_EXTMOD := $(M)
188endif
189
1da177e4
LT
190# If building an external module we do not care about the all: rule
191# but instead _all depend on modules
4f193362 192PHONY += all
1da177e4
LT
193ifeq ($(KBUILD_EXTMOD),)
194_all: all
195else
196_all: modules
197endif
198
9da0763b
MM
199ifeq ($(KBUILD_SRC),)
200 # building in the source tree
201 srctree := .
202else
203 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
204 # building in a subdirectory of the source tree
205 srctree := ..
206 else
207 srctree := $(KBUILD_SRC)
208 endif
209endif
7e1c0477 210objtree := .
1da177e4
LT
211src := $(srctree)
212obj := $(objtree)
213
0f558c33 214VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1da177e4 215
11294235 216export srctree objtree VPATH
1da177e4 217
1da177e4
LT
218# SUBARCH tells the usermode build what the underlying arch is. That is set
219# first, and if a usermode build is happening, the "ARCH=um" on the command
220# line overrides the setting of ARCH below. If a native build is happening,
38385f8f 221# then ARCH is assigned, getting whatever value it gets normally, and
1da177e4
LT
222# SUBARCH is subsequently ignored.
223
ffee0de4
DW
224SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
225 -e s/sun4u/sparc64/ \
1da177e4 226 -e s/arm.*/arm/ -e s/sa110/arm/ \
39990b5e 227 -e s/s390x/s390/ -e s/parisc64/parisc/ \
236b1957 228 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
f1b99392 229 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
1da177e4
LT
230
231# Cross compiling and selecting different set of gcc/bin-utils
232# ---------------------------------------------------------------------------
233#
234# When performing cross compilation for other architectures ARCH shall be set
235# to the target architecture. (See arch/* for the possibilities).
236# ARCH can be set during invocation of make:
237# make ARCH=ia64
238# Another way is to have ARCH set in the environment.
239# The default ARCH is the host where make is executed.
240
241# CROSS_COMPILE specify the prefix used for all executables used
242# during compilation. Only gcc and related bin-utils executables
243# are prefixed with $(CROSS_COMPILE).
244# CROSS_COMPILE can be set on the command line
245# make CROSS_COMPILE=ia64-linux-
246# Alternatively CROSS_COMPILE can be set in the environment.
84336466
RM
247# A third alternative is to store a setting in .config so that plain
248# "make" in the configured kernel build directory always uses that.
1da177e4
LT
249# Default value for CROSS_COMPILE is not to prefix executables
250# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
2331d1a6 251ARCH ?= $(SUBARCH)
84336466 252CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
1da177e4
LT
253
254# Architecture as present in compile.h
6752ed90
TG
255UTS_MACHINE := $(ARCH)
256SRCARCH := $(ARCH)
1da177e4 257
d746d647
SR
258# Additional ARCH settings for x86
259ifeq ($(ARCH),i386)
260 SRCARCH := x86
261endif
262ifeq ($(ARCH),x86_64)
263 SRCARCH := x86
264endif
74b469f2 265
5e538790 266# Additional ARCH settings for sparc
e69f58c0
NK
267ifeq ($(ARCH),sparc32)
268 SRCARCH := sparc
269endif
a439fe51 270ifeq ($(ARCH),sparc64)
5e538790 271 SRCARCH := sparc
a439fe51 272endif
2fb9b1bd 273
3cc000b5
PM
274# Additional ARCH settings for sh
275ifeq ($(ARCH),sh64)
276 SRCARCH := sh
277endif
278
18aecc2b 279# Additional ARCH settings for tile
6738d321
CM
280ifeq ($(ARCH),tilepro)
281 SRCARCH := tile
282endif
18aecc2b
CM
283ifeq ($(ARCH),tilegx)
284 SRCARCH := tile
285endif
286
5e538790
SR
287# Where to locate arch specific headers
288hdr-arch := $(SRCARCH)
289
14cdd3c4 290KCONFIG_CONFIG ?= .config
41263fc6 291export KCONFIG_CONFIG
14cdd3c4 292
1da177e4
LT
293# SHELL used by kbuild
294CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
295 else if [ -x /bin/bash ]; then echo /bin/bash; \
296 else echo sh; fi ; fi)
297
070b98bf
SR
298HOSTCC = gcc
299HOSTCXX = g++
51b97e35 300HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
070b98bf 301HOSTCXXFLAGS = -O2
1da177e4 302
61163efa
BW
303ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
304HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
305 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
306endif
307
070b98bf
SR
308# Decide whether to build built-in, modular, or both.
309# Normally, just do built-in.
1da177e4
LT
310
311KBUILD_MODULES :=
312KBUILD_BUILTIN := 1
313
3fbb43df
MY
314# If we have only "make modules", don't compile built-in objects.
315# When we're building modules with modversions, we need to consider
316# the built-in objects during the descend as well, in order to
317# make sure the checksums are up to date before we record them.
1da177e4
LT
318
319ifeq ($(MAKECMDGOALS),modules)
320 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
321endif
322
3fbb43df
MY
323# If we have "make <whatever> modules", compile modules
324# in addition to whatever we do anyway.
325# Just "make" or "make all" shall build modules as well
1da177e4
LT
326
327ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
328 KBUILD_MODULES := 1
329endif
330
331ifeq ($(MAKECMDGOALS),)
332 KBUILD_MODULES := 1
333endif
334
e579d351 335export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
336export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
337
1cacc9ab 338# We need some generic definitions (do not try to remake the file).
a436bb7b
MY
339scripts/Kbuild.include: ;
340include scripts/Kbuild.include
1da177e4
LT
341
342# Make variables (CC, etc...)
1da177e4
LT
343AS = $(CROSS_COMPILE)as
344LD = $(CROSS_COMPILE)ld
345CC = $(CROSS_COMPILE)gcc
346CPP = $(CC) -E
347AR = $(CROSS_COMPILE)ar
348NM = $(CROSS_COMPILE)nm
349STRIP = $(CROSS_COMPILE)strip
350OBJCOPY = $(CROSS_COMPILE)objcopy
351OBJDUMP = $(CROSS_COMPILE)objdump
352AWK = awk
353GENKSYMS = scripts/genksyms/genksyms
caa27b66 354INSTALLKERNEL := installkernel
1da177e4 355DEPMOD = /sbin/depmod
1da177e4 356PERL = perl
011bf125 357PYTHON = python
1da177e4
LT
358CHECK = sparse
359
80a7d1d9
HE
360CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
361 -Wbitwise -Wno-return-void $(CF)
6588169d
SR
362CFLAGS_MODULE =
363AFLAGS_MODULE =
364LDFLAGS_MODULE =
1da177e4
LT
365CFLAGS_KERNEL =
366AFLAGS_KERNEL =
2521f2c2 367CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
1da177e4
LT
368
369
abbf1590
DH
370# Use USERINCLUDE when you must reference the UAPI directories only.
371USERINCLUDE := \
372 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
373 -Iarch/$(hdr-arch)/include/generated/uapi \
374 -I$(srctree)/include/uapi \
375 -Iinclude/generated/uapi \
376 -include $(srctree)/include/linux/kconfig.h
377
1da177e4
LT
378# Use LINUXINCLUDE when you must reference the include/ directory.
379# Needed to be compatible with the O= option
abbf1590
DH
380LINUXINCLUDE := \
381 -I$(srctree)/arch/$(hdr-arch)/include \
90ac086b 382 -Iarch/$(hdr-arch)/include/generated/uapi \
abbf1590
DH
383 -Iarch/$(hdr-arch)/include/generated \
384 $(if $(KBUILD_SRC), -I$(srctree)/include) \
385 -Iinclude \
386 $(USERINCLUDE)
1da177e4 387
d8672b40 388KBUILD_CPPFLAGS := -D__KERNEL__
1da177e4 389
a0f97e06 390KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
94bed2a9 391 -fno-strict-aliasing -fno-common \
a8735821 392 -Werror-implicit-function-declaration \
51b97e35
KS
393 -Wno-format-security \
394 -std=gnu89
a1c48bb1 395
80c00ba9
SR
396KBUILD_AFLAGS_KERNEL :=
397KBUILD_CFLAGS_KERNEL :=
222d394d 398KBUILD_AFLAGS := -D__ASSEMBLY__
6588169d
SR
399KBUILD_AFLAGS_MODULE := -DMODULE
400KBUILD_CFLAGS_MODULE := -DMODULE
401KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
1da177e4 402
f1d28fb0
RZ
403# Read KERNELRELEASE from include/config/kernel.release (if it exists)
404KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
cacd54ef 405KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
cb58455c 406
070b98bf 407export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 408export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
caa27b66 409export CPP AR NM STRIP OBJCOPY OBJDUMP
011bf125 410export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
070b98bf 411export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 412
06c5040c 413export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
0b24becc 414export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KASAN
222d394d 415export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
6588169d 416export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
80c00ba9 417export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
40df759e 418export KBUILD_ARFLAGS
1da177e4
LT
419
420# When compiling out-of-tree modules, put MODVERDIR in the module
421# tree rather than in the kernel tree. The kernel tree might
422# even be read-only.
423export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
424
1da177e4
LT
425# Files to ignore in find ... statements
426
ae63b2d7
PB
427export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
428 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
429 -prune -o
450c6076
JJ
430export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
431 --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
432
433# ===========================================================================
434# Rules shared between *config targets and build targets
435
436# Basic helpers built in scripts/
4f193362 437PHONY += scripts_basic
1da177e4
LT
438scripts_basic:
439 $(Q)$(MAKE) $(build)=scripts/basic
638adb05 440 $(Q)rm -f .tmp_quiet_recordmcount
1da177e4 441
cd05e6bd
JB
442# To avoid any implicit rule to kick in, define an empty command.
443scripts/basic/%: scripts_basic ;
444
4f193362 445PHONY += outputmakefile
fd5f0cd6
JB
446# outputmakefile generates a Makefile in the output directory, if using a
447# separate output directory. This allows convenient use of make in the
448# output directory.
1da177e4 449outputmakefile:
fd5f0cd6 450ifneq ($(KBUILD_SRC),)
92979997 451 $(Q)ln -fsn $(srctree) source
fd5f0cd6
JB
452 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
453 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
454endif
1da177e4 455
d8ecc5cd
SR
456# Support for using generic headers in asm-generic
457PHONY += asm-generic
458asm-generic:
459 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
3c5994c8
CM
460 src=asm obj=arch/$(SRCARCH)/include/generated/asm
461 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
462 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
d8ecc5cd 463
1da177e4
LT
464# To make sure we do not include .config for any of the *config targets
465# catch them early, and hand them over to scripts/kconfig/Makefile
466# It is allowed to specify more targets when calling make, including
467# mixing *config targets and build targets.
070b98bf 468# For example 'make oldconfig all'.
1da177e4
LT
469# Detect when mixed targets is specified, and make a second invocation
470# of make so .config is not included in this case either (for *config).
471
10b63956 472version_h := include/generated/uapi/linux/version.h
223c24a7 473old_version_h := include/linux/version.h
d183e6f5 474
3eb3c740 475no-dot-config-targets := clean mrproper distclean \
fbae4d58 476 cscope gtags TAGS tags help% %docs check% coccicheck \
d183e6f5 477 $(version_h) headers_% archheaders archscripts \
4aed2fd8 478 kernelversion %src-pkg
1da177e4
LT
479
480config-targets := 0
481mixed-targets := 0
482dot-config := 1
483
484ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
485 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
486 dot-config := 0
487 endif
488endif
489
490ifeq ($(KBUILD_EXTMOD),)
491 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
492 config-targets := 1
d0d38cd9 493 ifneq ($(words $(MAKECMDGOALS)),1)
1da177e4
LT
494 mixed-targets := 1
495 endif
496 endif
497endif
498
499ifeq ($(mixed-targets),1)
500# ===========================================================================
501# We're called with mixed targets (*config and build targets).
502# Handle them one by one.
503
9319f453
MY
504PHONY += $(MAKECMDGOALS) __build_one_by_one
505
506$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
507 @:
508
509__build_one_by_one:
510 $(Q)set -e; \
511 for i in $(MAKECMDGOALS); do \
512 $(MAKE) -f $(srctree)/Makefile $$i; \
513 done
1da177e4
LT
514
515else
516ifeq ($(config-targets),1)
517# ===========================================================================
518# *config targets only - make sure prerequisites are updated, and descend
519# in scripts/kconfig to make the *config target
520
521# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
522# KBUILD_DEFCONFIG may point out an alternative default configuration
523# used for 'make defconfig'
a436bb7b 524include arch/$(SRCARCH)/Makefile
61bee204 525export KBUILD_DEFCONFIG KBUILD_KCONFIG
1da177e4 526
31110ebb 527config: scripts_basic outputmakefile FORCE
31110ebb
SR
528 $(Q)$(MAKE) $(build)=scripts/kconfig $@
529
530%config: scripts_basic outputmakefile FORCE
1da177e4
LT
531 $(Q)$(MAKE) $(build)=scripts/kconfig $@
532
533else
534# ===========================================================================
535# Build targets only - this includes vmlinux, arch specific targets, clean
536# targets and others. In general all targets except *config targets.
537
538ifeq ($(KBUILD_EXTMOD),)
539# Additional helpers built in scripts/
540# Carefully list dependencies so we do not try to build scripts twice
070b98bf 541# in parallel
4f193362 542PHONY += scripts
a54292f5
AS
543scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
544 asm-generic
1da177e4
LT
545 $(Q)$(MAKE) $(build)=$(@)
546
1da177e4
LT
547# Objects we will link into vmlinux / subdirs we need to visit
548init-y := init/
4d2acfbf 549drivers-y := drivers/ sound/ firmware/
1da177e4
LT
550net-y := net/
551libs-y := lib/
552core-y := usr/
37d9fe47 553virt-y := virt/
1da177e4
LT
554endif # KBUILD_EXTMOD
555
556ifeq ($(dot-config),1)
9ee4e336
SR
557# Read in config
558-include include/config/auto.conf
1da177e4 559
9ee4e336 560ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
561# Read in dependencies to all Kconfig* files, make sure to run
562# oldconfig if changes are detected.
c955ccaf 563-include include/config/auto.conf.cmd
1da177e4 564
1da177e4 565# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 566$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 567
c955ccaf 568# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 569# with it and forgot to run make oldconfig.
070b98bf 570# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 571# we execute the config step to be sure to catch updated Kconfig files
bc081dd6 572include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 573 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 574else
264a2683 575# external modules needs include/generated/autoconf.h and include/config/auto.conf
9ee4e336
SR
576# but do not care if they are up-to-date. Use auto.conf to trigger the test
577PHONY += include/config/auto.conf
578
579include/config/auto.conf:
264a2683 580 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
5369f550
MM
581 echo >&2; \
582 echo >&2 " ERROR: Kernel configuration is invalid."; \
583 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
584 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
585 echo >&2 ; \
9ee4e336
SR
586 /bin/false)
587
588endif # KBUILD_EXTMOD
c955ccaf 589
1da177e4
LT
590else
591# Dummy target needed, because used as prerequisite
c955ccaf 592include/config/auto.conf: ;
9ee4e336 593endif # $(dot-config)
1da177e4
LT
594
595# The all: target is the default when no target is given on the
596# command line.
597# This allow a user to issue only 'make' to build a kernel including modules
c8447161 598# Defaults to vmlinux, but the arch makefile usually adds further targets
1da177e4
LT
599all: vmlinux
600
6dd3f13e
MM
601# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
602# values of the respective KBUILD_* variables
603ARCH_CPPFLAGS :=
604ARCH_AFLAGS :=
605ARCH_CFLAGS :=
a436bb7b 606include arch/$(SRCARCH)/Makefile
a1c48bb1
GU
607
608KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
609
1da177e4 610ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
e74fc973 611KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
1da177e4 612else
a0f97e06 613KBUILD_CFLAGS += -O2
1da177e4
LT
614endif
615
69102311
JK
616# Tell gcc to never replace conditional load with a non-conditional one
617KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
618
1873e870
AK
619ifdef CONFIG_READABLE_ASM
620# Disable optimizations that make assembler listings hard to read.
621# reorder blocks reorders the control in the function
622# ipa clone creates specialized cloned functions
623# partial inlining inlines only parts of functions
624KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
625 $(call cc-option,-fno-ipa-cp-clone,) \
626 $(call cc-option,-fno-partial-inlining)
627endif
628
08f67461 629ifneq ($(CONFIG_FRAME_WARN),0)
35bb5b1e
AK
630KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
631endif
632
19952a92 633# Handle stack protector mode.
1332429b
KC
634#
635# Since kbuild can potentially perform two passes (first with the old
636# .config values and then with updated .config values), we cannot error out
637# if a desired compiler option is unsupported. If we were to error, kbuild
638# could never get to the second pass and actually notice that we changed
639# the option to something that was supported.
640#
641# Additionally, we don't want to fallback and/or silently change which compiler
642# flags will be used, since that leads to producing kernels with different
643# security feature characteristics depending on the compiler used. ("But I
644# selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
645#
646# The middle ground is to warn here so that the failed option is obvious, but
647# to let the build fail with bad compiler flags so that we can't produce a
648# kernel when there is a CONFIG and compiler mismatch.
649#
8779657d 650ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
19952a92
KC
651 stackp-flag := -fstack-protector
652 ifeq ($(call cc-option, $(stackp-flag)),)
6c15b327 653 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
27b2a49a 654 -fstack-protector not supported by compiler)
19952a92 655 endif
6c15b327
JB
656else
657ifdef CONFIG_CC_STACKPROTECTOR_STRONG
8779657d
KC
658 stackp-flag := -fstack-protector-strong
659 ifeq ($(call cc-option, $(stackp-flag)),)
660 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
661 -fstack-protector-strong not supported by compiler)
662 endif
19952a92
KC
663else
664 # Force off for distro compilers that enable stack protector by default.
665 stackp-flag := $(call cc-option, -fno-stack-protector)
5d707e9c 666endif
6c15b327 667endif
19952a92 668KBUILD_CFLAGS += $(stackp-flag)
e06b8b98 669
5631d9c4 670ifeq ($(cc-name),clang)
61163efa
BW
671KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
672KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
673KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
674KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
675KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
676# Quiet clang warning: comparison of unsigned expression < 0 is always false
677KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
678# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
679# source of a reference will be _MergedGlobals and not on of the whitelisted names.
680# See modpost pattern 2
681KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
26ea6bb1 682KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
61163efa
BW
683else
684
af0e5d56
DJ
685# This warning generated too much noise in a regular build.
686# Use make W=1 to enable this warning (see scripts/Makefile.build)
8417da6f 687KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
61163efa 688endif
af0e5d56 689
1da177e4 690ifdef CONFIG_FRAME_POINTER
a0f97e06 691KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 692else
7e9501fd
RV
693# Some targets (ARM with Thumb2, for example), can't be built with frame
694# pointers. For those, we don't have FUNCTION_TRACER automatically
695# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
696# incompatible with -fomit-frame-pointer with current GCC, so we don't use
697# -fomit-frame-pointer with FUNCTION_TRACER.
698ifndef CONFIG_FUNCTION_TRACER
a0f97e06 699KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4 700endif
7e9501fd 701endif
1da177e4 702
2062afb4
LT
703KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
704
1da177e4 705ifdef CONFIG_DEBUG_INFO
866ced95
AK
706ifdef CONFIG_DEBUG_INFO_SPLIT
707KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
708else
a0f97e06 709KBUILD_CFLAGS += -g
866ced95 710endif
2288328c 711KBUILD_AFLAGS += -Wa,-gdwarf-2
1da177e4 712endif
bfaf2dd3
AK
713ifdef CONFIG_DEBUG_INFO_DWARF4
714KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
715endif
1da177e4 716
d6f4ceb7 717ifdef CONFIG_DEBUG_INFO_REDUCED
e82c4bb8
AK
718KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
719 $(call cc-option,-fno-var-tracking)
d6f4ceb7
AK
720endif
721
606576ce 722ifdef CONFIG_FUNCTION_TRACER
c0a80c0c
HC
723ifndef CC_FLAGS_FTRACE
724CC_FLAGS_FTRACE := -pg
725endif
726export CC_FLAGS_FTRACE
a2546fae
SR
727ifdef CONFIG_HAVE_FENTRY
728CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
729endif
c0a80c0c 730KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
a2546fae 731KBUILD_AFLAGS += $(CC_USING_FENTRY)
72441cb1 732ifdef CONFIG_DYNAMIC_FTRACE
cf4db259 733 ifdef CONFIG_HAVE_C_RECORDMCOUNT
72441cb1
SR
734 BUILD_C_RECORDMCOUNT := y
735 export BUILD_C_RECORDMCOUNT
736 endif
737endif
16444a8a
ACM
738endif
739
91341d4b
SR
740# We trigger additional mismatches with less inlining
741ifdef CONFIG_DEBUG_SECTION_MISMATCH
742KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
743endif
744
e8e69931 745# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 746NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
747CHECKFLAGS += $(NOSTDINC_FLAGS)
748
1da177e4 749# warn about C99 declaration after statement
a0f97e06 750KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 751
070b98bf 752# disable pointer signed / unsigned warnings in gcc 4.0
8417da6f 753KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
1da177e4 754
fe8d0a41 755# disable invalid "can't wrap" optimizations for signed / pointers
a137802e 756KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
d0115552 757
8f7f5c9f
AK
758# conserve stack if available
759KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
760
80970472
ST
761# disallow errors like 'EXPORT_GPL(foo);' with missing header
762KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
763
764# require functions to have arguments in prototypes, not empty 'int foo()'
765KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
766
fe7c36c7
JT
767# Prohibit date/time macros, which would make the build non-deterministic
768KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
769
40df759e
MM
770# use the deterministic mode of AR if available
771KBUILD_ARFLAGS := $(call ar-option,D)
772
bf5438fc
JB
773# check for 'asm goto'
774ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
775 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
c0ccf6f9 776 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
bf5438fc
JB
777endif
778
a436bb7b
MY
779include scripts/Makefile.kasan
780include scripts/Makefile.extrawarn
a86fe353 781
61754c18
MM
782# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
783# last assignments
784KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
785KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
786KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
52bcc330 787
18991197
RM
788# Use --build-id when available.
789LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
f86fd306 790 $(call cc-ldoption, -Wl$(comma)--build-id,))
6588169d 791KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
18991197
RM
792LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
793
5d7d18f5 794ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
d79a2719 795LDFLAGS_vmlinux += $(call ld-option, -X,)
5d7d18f5
DH
796endif
797
1da177e4 798# Default kernel image to build when no specific target is given.
070b98bf 799# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
800# set in the environment
801# Also any assignments in arch/$(ARCH)/Makefile take precedence over
802# this default value
803export KBUILD_IMAGE ?= vmlinux
804
805#
806# INSTALL_PATH specifies where to place the updated kernel and system map
807# images. Default is /boot, but you can set it to other values
808export INSTALL_PATH ?= /boot
809
f4d4ffc0
JC
810#
811# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
812# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
813# an argument if needed. Otherwise it defaults to the kernel install path
814#
815export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
816
1da177e4
LT
817#
818# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
819# relocations required by build roots. This is not defined in the
070b98bf 820# makefile but the argument can be passed to make if needed.
1da177e4
LT
821#
822
df9df036 823MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
824export MODLIB
825
ac031f26 826#
3fbb43df
MY
827# INSTALL_MOD_STRIP, if defined, will cause modules to be
828# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
829# the default option --strip-debug will be used. Otherwise,
830# INSTALL_MOD_STRIP value will be used as the options to the strip command.
2ea03891 831
ac031f26
TT
832ifdef INSTALL_MOD_STRIP
833ifeq ($(INSTALL_MOD_STRIP),1)
2ea03891 834mod_strip_cmd = $(STRIP) --strip-debug
ac031f26 835else
2ea03891 836mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
ac031f26
TT
837endif # INSTALL_MOD_STRIP=1
838else
2ea03891 839mod_strip_cmd = true
ac031f26
TT
840endif # INSTALL_MOD_STRIP
841export mod_strip_cmd
842
beb50df3
BJ
843# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
844# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
845# or CONFIG_MODULE_COMPRESS_XZ.
846
847mod_compress_cmd = true
848ifdef CONFIG_MODULE_COMPRESS
849 ifdef CONFIG_MODULE_COMPRESS_GZIP
3d1450d5 850 mod_compress_cmd = gzip -n -f
beb50df3
BJ
851 endif # CONFIG_MODULE_COMPRESS_GZIP
852 ifdef CONFIG_MODULE_COMPRESS_XZ
3d1450d5 853 mod_compress_cmd = xz -f
beb50df3
BJ
854 endif # CONFIG_MODULE_COMPRESS_XZ
855endif # CONFIG_MODULE_COMPRESS
856export mod_compress_cmd
857
1bf49dd4 858# Select initial ramdisk compression format, default is gzip(1).
859# This shall be used by the dracut(8) tool while creating an initramfs image.
860#
7ac18156
JB
861INITRD_COMPRESS-y := gzip
862INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
863INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
864INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
865INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
866INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
b7000ade
LT
867# do not export INITRD_COMPRESS, since we didn't actually
868# choose a sane default compression above.
869# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1da177e4 870
d9d8d7ed 871ifdef CONFIG_MODULE_SIG_ALL
3ee550f1
DW
872$(eval $(call config_filename,MODULE_SIG_KEY))
873
874mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
e2a666d5
RR
875else
876mod_sign_cmd = true
877endif
878export mod_sign_cmd
879
880
1da177e4 881ifeq ($(KBUILD_EXTMOD),)
cfc411e7 882core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
883
884vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
885 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
37d9fe47 886 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
1da177e4
LT
887
888vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
37d9fe47 889 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
1da177e4
LT
890
891init-y := $(patsubst %/, %/built-in.o, $(init-y))
892core-y := $(patsubst %/, %/built-in.o, $(core-y))
893drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
894net-y := $(patsubst %/, %/built-in.o, $(net-y))
895libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
896libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
897libs-y := $(libs-y1) $(libs-y2)
37d9fe47 898virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
1da177e4 899
1f2bfbd0 900# Externally visible symbols (used by link-vmlinux.sh)
95698570 901export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
37d9fe47 902export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y)
95698570 903export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1f2bfbd0 904export LDFLAGS_vmlinux
6615d6c3 905# used by scripts/pacmage/Makefile
37d9fe47 906export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
9bb48247 907
1f2bfbd0 908vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
1da177e4 909
1f2bfbd0
SR
910# Final link of vmlinux
911 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
912quiet_cmd_link-vmlinux = LINK $@
1da177e4 913
1f2bfbd0
SR
914# Include targets which we want to
915# execute if the rest of the kernel build went well.
916vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
0f836e5f 917ifdef CONFIG_HEADERS_CHECK
0e7af8d0 918 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025
MD
919endif
920ifdef CONFIG_SAMPLES
921 $(Q)$(MAKE) $(build)=samples
3794f3e8
RD
922endif
923ifdef CONFIG_BUILD_DOCSRC
924 $(Q)$(MAKE) $(build)=Documentation
3ee7b3fa
JK
925endif
926ifdef CONFIG_GDB_SCRIPTS
927 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
0f836e5f 928endif
1f2bfbd0 929 +$(call if_changed,link-vmlinux)
741f98fe 930
38385f8f 931# The actual objects are generated when descending,
1da177e4 932# make sure no implicit rule kicks in
1f2bfbd0 933$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1da177e4
LT
934
935# Handle descending into subdirectories listed in $(vmlinux-dirs)
936# Preset locale variables to speed up the build process. Limit locale
937# tweaks to this spot to avoid wrong language settings when running
938# make menuconfig etc.
939# Error messages still appears in the original language
940
4f193362 941PHONY += $(vmlinux-dirs)
5bb78269 942$(vmlinux-dirs): prepare scripts
1da177e4
LT
943 $(Q)$(MAKE) $(build)=$@
944
0d0e7718
MM
945define filechk_kernel.release
946 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
947endef
948
83a35e36 949# Store (new) KERNELRELEASE string in include/config/kernel.release
f1d28fb0 950include/config/kernel.release: include/config/auto.conf FORCE
0d0e7718 951 $(call filechk,kernel.release)
cb58455c
SR
952
953
1da177e4 954# Things we need to do before we recursively start building the kernel
5bb78269
SR
955# or the modules are listed in "prepare".
956# A multi level approach is used. prepareN is processed before prepareN-1.
957# archprepare is used in arch Makefiles and when processed asm symlink,
958# version.h and scripts_basic is processed / created.
1da177e4 959
5bb78269 960# Listed in dependency order
4f193362 961PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 962
86feeaa8 963# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
964# and if so do:
965# 1) Check that make has not been executed in the kernel src $(srctree)
f1d28fb0 966prepare3: include/config/kernel.release
1da177e4 967ifneq ($(KBUILD_SRC),)
fd54f502 968 @$(kecho) ' Using $(srctree) as source for kernel'
c955ccaf 969 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
5369f550
MM
970 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
971 echo >&2 " in the '$(srctree)' directory.";\
1da177e4
LT
972 /bin/false; \
973 fi;
1da177e4
LT
974endif
975
86feeaa8 976# prepare2 creates a makefile if using a separate output directory
d8ecc5cd 977prepare2: prepare3 outputmakefile asm-generic
1da177e4 978
d183e6f5 979prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
f7f16b77 980 include/config/auto.conf
7bb9d092 981 $(cmd_crmodverdir)
1da177e4 982
6520fe55 983archprepare: archheaders archscripts prepare1 scripts_basic
5bb78269
SR
984
985prepare0: archprepare FORCE
8d36a623 986 $(Q)$(MAKE) $(build)=.
86feeaa8 987
1da177e4 988# All the preparing..
d395efb5 989prepare: prepare0
1da177e4 990
1da177e4
LT
991# Generate some files
992# ---------------------------------------------------------------------------
993
994# KERNELRELEASE can change from a few different places, meaning version.h
995# needs to be updated, so this check is forced on all builds
996
997uts_len := 64
63104eec
SR
998define filechk_utsrelease.h
999 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1000 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1001 exit 1; \
1002 fi; \
1003 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1004endef
1da177e4
LT
1005
1006define filechk_version.h
450c6076
JJ
1007 (echo \#define LINUX_VERSION_CODE $(shell \
1008 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
63104eec 1009 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
1010endef
1011
d183e6f5 1012$(version_h): $(srctree)/Makefile FORCE
1da177e4 1013 $(call filechk,version.h)
223c24a7 1014 $(Q)rm -f $(old_version_h)
1da177e4 1015
273b281f 1016include/generated/utsrelease.h: include/config/kernel.release FORCE
63104eec
SR
1017 $(call filechk,utsrelease.h)
1018
179efcb4
VN
1019PHONY += headerdep
1020headerdep:
9663d989
PF
1021 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1022 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
179efcb4 1023
88ecf814
DW
1024# ---------------------------------------------------------------------------
1025# Firmware install
1026INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1027export INSTALL_FW_PATH
1028
1029PHONY += firmware_install
1030firmware_install: FORCE
1031 @mkdir -p $(objtree)/firmware
1032 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1033
8d730cfb
DW
1034# ---------------------------------------------------------------------------
1035# Kernel headers
8d730cfb 1036
e6883b18
SR
1037#Default location for installed headers
1038export INSTALL_HDR_PATH = $(objtree)/usr
6d716275 1039
2fb9b1bd
SR
1040# If we do an all arch process set dst to asm-$(hdr-arch)
1041hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
e6883b18 1042
052ad274
PA
1043PHONY += archheaders
1044archheaders:
1045
6520fe55
PA
1046PHONY += archscripts
1047archscripts:
1048
e6883b18 1049PHONY += __headers
d183e6f5 1050__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
e1b702cf 1051 $(Q)$(MAKE) $(build)=scripts build_unifdef
e6883b18
SR
1052
1053PHONY += headers_install_all
2fb9b1bd
SR
1054headers_install_all:
1055 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
6d716275 1056
8d730cfb 1057PHONY += headers_install
e6883b18 1058headers_install: __headers
10b63956
DH
1059 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1060 $(error Headers not exportable for the $(SRCARCH) architecture))
1061 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1062 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
8d730cfb 1063
1f85712e
MF
1064PHONY += headers_check_all
1065headers_check_all: headers_install_all
2fb9b1bd 1066 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1f85712e 1067
68475359
DW
1068PHONY += headers_check
1069headers_check: headers_install
10b63956
DH
1070 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1071 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
68475359 1072
5a5da78b
SK
1073# ---------------------------------------------------------------------------
1074# Kernel selftest
1075
1076PHONY += kselftest
1077kselftest:
1078 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1079
dcb825a9
WL
1080kselftest-clean:
1081 $(Q)$(MAKE) -C tools/testing/selftests clean
1082
1da177e4
LT
1083# ---------------------------------------------------------------------------
1084# Modules
1085
1086ifdef CONFIG_MODULES
1087
070b98bf 1088# By default, build modules as well
1da177e4 1089
73d1393e 1090all: modules
1da177e4 1091
3fbb43df 1092# Build modules
551559e1 1093#
3fbb43df
MY
1094# A module can be listed more than once in obj-m resulting in
1095# duplicate lines in modules.order files. Those are removed
1096# using awk while concatenating to the final file.
1da177e4 1097
4f193362 1098PHONY += modules
2da30e70 1099modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
551559e1 1100 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
fd54f502 1101 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1102 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
44463f7d 1103 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1da177e4 1104
a6c36632
MM
1105modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1106 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1107
73d1393e 1108%/modules.builtin: include/config/auto.conf
a6c36632
MM
1109 $(Q)$(MAKE) $(modbuiltin)=$*
1110
1da177e4
LT
1111
1112# Target to prepare building external modules
4f193362 1113PHONY += modules_prepare
5bb78269 1114modules_prepare: prepare scripts
1da177e4
LT
1115
1116# Target to install modules
4f193362 1117PHONY += modules_install
1da177e4
LT
1118modules_install: _modinst_ _modinst_post
1119
4f193362 1120PHONY += _modinst_
2da30e70 1121_modinst_:
1da177e4
LT
1122 @rm -rf $(MODLIB)/kernel
1123 @rm -f $(MODLIB)/source
1124 @mkdir -p $(MODLIB)/kernel
890676c6 1125 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1da177e4
LT
1126 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1127 rm -f $(MODLIB)/build ; \
7e1c0477 1128 ln -s $(CURDIR) $(MODLIB)/build ; \
1da177e4 1129 fi
551559e1 1130 @cp -f $(objtree)/modules.order $(MODLIB)/
bc081dd6 1131 @cp -f $(objtree)/modules.builtin $(MODLIB)/
b805aa0e 1132 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1133
50a8ec31 1134# This depmod is only for convenience to give the initial
1da177e4
LT
1135# boot a modules.dep even before / is mounted read-write. However the
1136# boot script depmod is the master version.
4f193362 1137PHONY += _modinst_post
6d128e1e 1138_modinst_post: _modinst_
88ecf814 1139 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
50a8ec31 1140 $(call cmd,depmod)
1da177e4 1141
d890f510
JB
1142ifeq ($(CONFIG_MODULE_SIG), y)
1143PHONY += modules_sign
1144modules_sign:
1145 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1146endif
1147
1da177e4
LT
1148else # CONFIG_MODULES
1149
1150# Modules not configured
1151# ---------------------------------------------------------------------------
1152
1153modules modules_install: FORCE
5369f550
MM
1154 @echo >&2
1155 @echo >&2 "The present kernel configuration has modules disabled."
1156 @echo >&2 "Type 'make config' and enable loadable module support."
1157 @echo >&2 "Then build a kernel with module support enabled."
1158 @echo >&2
1da177e4
LT
1159 @exit 1
1160
1161endif # CONFIG_MODULES
1162
1da177e4
LT
1163###
1164# Cleaning is done on three levels.
1165# make clean Delete most generated files
1166# Leave enough to build external modules
1167# make mrproper Delete the current configuration, and all generated files
1168# make distclean Remove editor backup files, patch leftover files and the like
1169
1170# Directories & files removed with 'make clean'
1171CLEAN_DIRS += $(MODVERDIR)
1da177e4
LT
1172
1173# Directories & files removed with 'make mrproper'
d8ecc5cd 1174MRPROPER_DIRS += include/config usr/include include/generated \
3fbb43df 1175 arch/*/include/generated .tmp_objdiff
c22bd32c 1176MRPROPER_FILES += .config .config.old .version .old_version \
d5b71936 1177 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
fb117949
DW
1178 signing_key.pem signing_key.priv signing_key.x509 \
1179 x509.genkey extra_certificates signing_key.x509.keyid \
3ee7b3fa 1180 signing_key.x509.signer vmlinux-gdb.py
1da177e4
LT
1181
1182# clean - Delete most, but leave enough to build external modules
1183#
1184clean: rm-dirs := $(CLEAN_DIRS)
1185clean: rm-files := $(CLEAN_FILES)
fb68d4be 1186clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1da177e4 1187
bd1ee804 1188PHONY += $(clean-dirs) clean archclean vmlinuxclean
1da177e4
LT
1189$(clean-dirs):
1190 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1191
bd1ee804
PM
1192vmlinuxclean:
1193 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1194
1195clean: archclean vmlinuxclean
1da177e4
LT
1196
1197# mrproper - Delete all generated files, including .config
1198#
1199mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1200mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1201mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1202
4f193362 1203PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1204$(mrproper-dirs):
1205 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1206
1207mrproper: clean archmrproper $(mrproper-dirs)
1208 $(call cmd,rmdirs)
1209 $(call cmd,rmfiles)
1210
1211# distclean
1212#
4f193362 1213PHONY += distclean
1da177e4
LT
1214
1215distclean: mrproper
1216 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1217 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1218 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
a03fcb50 1219 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
1da177e4
LT
1220 -type f -print | xargs rm -f
1221
1222
1223# Packaging of the kernel to various formats
1224# ---------------------------------------------------------------------------
1225# rpm target kept for backward compatibility
c79624c1 1226package-dir := scripts/package
1da177e4 1227
bafb6747
ACM
1228%src-pkg: FORCE
1229 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1230%pkg: include/config/kernel.release FORCE
6c2133e1 1231 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1232rpm: include/config/kernel.release FORCE
6c2133e1 1233 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1234
1235
1236# Brief documentation of the typical targets used
1237# ---------------------------------------------------------------------------
1238
5dffbe81 1239boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
a1e7b7bb 1240boards := $(sort $(notdir $(boards)))
5dffbe81
SB
1241board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1242board-dirs := $(sort $(notdir $(board-dirs:/=)))
1da177e4
LT
1243
1244help:
1245 @echo 'Cleaning targets:'
5ea084ef 1246 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1247 @echo ' enough build support to build external modules'
5ea084ef 1248 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1249 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1250 @echo ''
1251 @echo 'Configuration targets:'
1252 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1253 @echo ''
1254 @echo 'Other generic targets:'
1255 @echo ' all - Build all targets marked with [*]'
1256 @echo '* vmlinux - Build the bare kernel'
1257 @echo '* modules - Build all modules'
9cc5d74c 1258 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
88ecf814
DW
1259 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1260 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1da177e4 1261 @echo ' dir/ - Build all files in dir and below'
62718979
JP
1262 @echo ' dir/file.[oisS] - Build specified target only'
1263 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1264 @echo ' (requires a recent binutils and recent build (System.map))'
155ad605 1265 @echo ' dir/file.ko - Build module including final link'
c4d5ee67 1266 @echo ' modules_prepare - Set up for building external modules'
1da177e4
LT
1267 @echo ' tags/TAGS - Generate tags file for editors'
1268 @echo ' cscope - Generate cscope index'
f4ed1009 1269 @echo ' gtags - Generate GNU GLOBAL index'
3f1d9a6c
MM
1270 @echo ' kernelrelease - Output the release version string (use with make -s)'
1271 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1272 @echo ' image_name - Output the image name (use with make -s)'
2fb9b1bd 1273 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1274 echo ' (default: $(INSTALL_HDR_PATH))'; \
2fb9b1bd 1275 echo ''
1da177e4 1276 @echo 'Static analysers'
1da177e4
LT
1277 @echo ' checkstack - Generate a list of stack hogs'
1278 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1279 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1280 @echo ' includecheck - Check for duplicate included header files'
295ac051 1281 @echo ' export_report - List the usages of all exported symbols'
179efcb4 1282 @echo ' headers_check - Sanity check on exported headers'
74425eee
NP
1283 @echo ' headerdep - Detect inclusion cycles in headers'
1284 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1285 @echo ''
5a5da78b
SK
1286 @echo 'Kernel selftest'
1287 @echo ' kselftest - Build and run kernel selftest (run as root)'
1288 @echo ' Build, install, and boot kernel before'
1289 @echo ' running kselftest on it'
dcb825a9 1290 @echo ' kselftest-clean - Remove all generated kselftest files'
5a5da78b 1291 @echo ''
1da177e4 1292 @echo 'Kernel packaging:'
6c2133e1 1293 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1294 @echo ''
1295 @echo 'Documentation targets:'
1296 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1297 @echo ''
01dee188 1298 @echo 'Architecture specific targets ($(SRCARCH)):'
1da177e4 1299 @$(if $(archhelp),$(archhelp),\
01dee188 1300 echo ' No architecture specific help defined for $(SRCARCH)')
1da177e4
LT
1301 @echo ''
1302 @$(if $(boards), \
1303 $(foreach b, $(boards), \
1304 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1305 echo '')
5dffbe81
SB
1306 @$(if $(board-dirs), \
1307 $(foreach b, $(board-dirs), \
1308 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1309 printf " %-16s - Show all of the above\\n" help-boards; \
1310 echo '')
1da177e4
LT
1311
1312 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1313 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1314 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1315 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1316 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
af07ce3e 1317 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
28bc20dc
SR
1318 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1319 @echo ' 1: warnings which may be relevant and do not occur too often'
1320 @echo ' 2: warnings which occur quite often but may still be relevant'
1321 @echo ' 3: more obscure warnings, can most likely be ignored'
a6de553d 1322 @echo ' Multiple levels can be combined with W=12 or W=123'
1da177e4
LT
1323 @echo ''
1324 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1325 @echo 'For further info see the ./README file'
1326
1327
5dffbe81
SB
1328help-board-dirs := $(addprefix help-,$(board-dirs))
1329
1330help-boards: $(help-board-dirs)
1331
fbae4d58 1332boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
5dffbe81
SB
1333
1334$(help-board-dirs): help-%:
1335 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1336 @$(if $(boards-per-dir), \
1337 $(foreach b, $(boards-per-dir), \
1338 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1339 echo '')
1340
1341
1da177e4
LT
1342# Documentation targets
1343# ---------------------------------------------------------------------------
1344%docs: scripts_basic FORCE
b479bfd0 1345 $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype
1da177e4
LT
1346 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1347
1348else # KBUILD_EXTMOD
1349
1350###
1351# External module support.
1352# When building external modules the kernel used as basis is considered
1353# read-only, and no consistency checks are made and the make
1354# system is not used on the basis kernel. If updates are required
1355# in the basis kernel ordinary make commands (without M=...) must
1356# be used.
1357#
1358# The following are the only valid targets when building external
1359# modules.
1360# make M=dir clean Delete all automatically generated files
1361# make M=dir modules Make all modules in specified dir
1362# make M=dir Same as 'make M=dir modules'
1363# make M=dir modules_install
070b98bf 1364# Install the modules built in the module directory
1da177e4
LT
1365# Assumes install directory is already created
1366
1367# We are always building modules
1368KBUILD_MODULES := 1
4f193362 1369PHONY += crmodverdir
1da177e4 1370crmodverdir:
7bb9d092 1371 $(cmd_crmodverdir)
1da177e4 1372
4f193362 1373PHONY += $(objtree)/Module.symvers
1da177e4
LT
1374$(objtree)/Module.symvers:
1375 @test -e $(objtree)/Module.symvers || ( \
1376 echo; \
1377 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1378 echo " is missing; modules will have no dependencies and modversions."; \
1379 echo )
1380
1381module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1382PHONY += $(module-dirs) modules
1da177e4
LT
1383$(module-dirs): crmodverdir $(objtree)/Module.symvers
1384 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1385
1386modules: $(module-dirs)
fd54f502 1387 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1388 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1389
4f193362 1390PHONY += modules_install
a67dc21a 1391modules_install: _emodinst_ _emodinst_post
e6304663 1392
4f193362
PS
1393install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1394PHONY += _emodinst_
a67dc21a 1395_emodinst_:
a67dc21a 1396 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1397 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1398
4f193362 1399PHONY += _emodinst_post
a67dc21a
SR
1400_emodinst_post: _emodinst_
1401 $(call cmd,depmod)
1402
1da177e4
LT
1403clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1404
4f193362 1405PHONY += $(clean-dirs) clean
1da177e4
LT
1406$(clean-dirs):
1407 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1408
1409clean: rm-dirs := $(MODVERDIR)
88d7be03 1410clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1da177e4
LT
1411
1412help:
1413 @echo ' Building external modules.'
1414 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1415 @echo ''
1416 @echo ' modules - default target, build the module(s)'
1417 @echo ' modules_install - install the module'
1418 @echo ' clean - remove generated files in module directory only'
1419 @echo ''
06300b21
SR
1420
1421# Dummies...
4f193362 1422PHONY += prepare scripts
06300b21
SR
1423prepare: ;
1424scripts: ;
1da177e4
LT
1425endif # KBUILD_EXTMOD
1426
88d7be03
MM
1427clean: $(clean-dirs)
1428 $(call cmd,rmdirs)
1429 $(call cmd,rmfiles)
43f67c98 1430 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
88d7be03 1431 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
addbcdbb 1432 -o -name '*.ko.*' \
866ced95 1433 -o -name '*.dwo' \
d523b255 1434 -o -name '*.su' \
88d7be03
MM
1435 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1436 -o -name '*.symtypes' -o -name 'modules.order' \
1437 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1438 -o -name '*.gcno' \) -type f -print | xargs rm -f
1439
1da177e4
LT
1440# Generate tags for editors
1441# ---------------------------------------------------------------------------
a680eedc
SR
1442quiet_cmd_tags = GEN $@
1443 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1da177e4 1444
f4ed1009 1445tags TAGS cscope gtags: FORCE
1da177e4
LT
1446 $(call cmd,tags)
1447
1da177e4
LT
1448# Scripts to check various things for consistency
1449# ---------------------------------------------------------------------------
1450
279f3dd3
PF
1451PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1452
1da177e4 1453includecheck:
436f876c 1454 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1455 -name '*.[hcS]' -type f -print | sort \
80007434 1456 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1457
1458versioncheck:
2ee2d292 1459 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1460 -name '*.[hcS]' -type f -print | sort \
80007434 1461 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1462
74425eee
NP
1463coccicheck:
1464 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1465
1da177e4
LT
1466namespacecheck:
1467 $(PERL) $(srctree)/scripts/namespace.pl
1468
295ac051
AB
1469export_report:
1470 $(PERL) $(srctree)/scripts/export_report.pl
1471
1da177e4
LT
1472endif #ifeq ($(config-targets),1)
1473endif #ifeq ($(mixed-targets),1)
1474
c398ff00 1475PHONY += checkstack kernelrelease kernelversion image_name
e3ccf6e3 1476
011e3a9a
JD
1477# UML needs a little special treatment here. It wants to use the host
1478# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1479# else wants $(ARCH), including people doing cross-builds, which means
1480# that $(SUBARCH) doesn't work here.
1481ifeq ($(ARCH), um)
1482CHECKSTACK_ARCH := $(SUBARCH)
1483else
1484CHECKSTACK_ARCH := $(ARCH)
1485endif
1da177e4
LT
1486checkstack:
1487 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1488 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4 1489
7b8ea53d
AW
1490kernelrelease:
1491 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
01ab1788 1492
cb58455c 1493kernelversion:
2244cbd8 1494 @echo $(KERNELVERSION)
1da177e4 1495
c398ff00
MM
1496image_name:
1497 @echo $(KBUILD_IMAGE)
1498
ea01fa9f
BP
1499# Clear a bunch of variables before executing the submake
1500tools/: FORCE
bf35182f 1501 $(Q)mkdir -p $(objtree)/tools
16671c1e 1502 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(O) subdir=tools -C $(src)/tools/
ea01fa9f
BP
1503
1504tools/%: FORCE
bf35182f 1505 $(Q)mkdir -p $(objtree)/tools
16671c1e 1506 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(O) subdir=tools -C $(src)/tools/ $*
ea01fa9f 1507
06300b21
SR
1508# Single targets
1509# ---------------------------------------------------------------------------
bc2546a6 1510# Single targets are compatible with:
e1b8513d 1511# - build with mixed source and output
bc2546a6
SR
1512# - build with separate output dir 'make O=...'
1513# - external modules
1514#
1515# target-dir => where to store outputfile
1516# build-dir => directory in kernel source tree to use
1517
1518ifeq ($(KBUILD_EXTMOD),)
aa360879 1519 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1520 target-dir = $(dir $@)
1521else
1522 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1523 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1524 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1525endif
1526
f6ecebd6 1527%.s: %.c prepare scripts FORCE
bc2546a6 1528 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1529%.i: %.c prepare scripts FORCE
bc2546a6 1530 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1531%.o: %.c prepare scripts FORCE
bc2546a6 1532 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1533%.lst: %.c prepare scripts FORCE
bc2546a6 1534 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1535%.s: %.S prepare scripts FORCE
bc2546a6 1536 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1537%.o: %.S prepare scripts FORCE
bc2546a6 1538 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1539%.symtypes: %.c prepare scripts FORCE
1540 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1541
bc2546a6 1542# Modules
31110ebb
SR
1543/: prepare scripts FORCE
1544 $(cmd_crmodverdir)
1545 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1546 $(build)=$(build-dir)
8e2faea8
PF
1547# Make sure the latest headers are built for Documentation
1548Documentation/: headers_install
31110ebb 1549%/: prepare scripts FORCE
7bb9d092 1550 $(cmd_crmodverdir)
06300b21 1551 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1552 $(build)=$(build-dir)
1553%.ko: prepare scripts FORCE
7bb9d092 1554 $(cmd_crmodverdir)
06300b21 1555 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1556 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1557 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1558
38385f8f 1559# FIXME Should go into a make.lib or something
1da177e4
LT
1560# ===========================================================================
1561
1562quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1563 cmd_rmdirs = rm -rf $(rm-dirs)
1564
1565quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1566 cmd_rmfiles = rm -f $(rm-files)
1567
bc3c26fe 1568# Run depmod only if we have System.map and depmod is executable
50a8ec31 1569quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
569658dd 1570 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
b92021b0 1571 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
50a8ec31 1572
7bb9d092 1573# Create temporary dir for module support files
ab19f879
SR
1574# clean it up only when building all modules
1575cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1576 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1da177e4 1577
1da177e4
LT
1578# read all saved command lines
1579
1580targets := $(wildcard $(sort $(targets)))
1581cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1582
1583ifneq ($(cmd_files),)
1584 $(cmd_files): ; # Do not try to update included dependency files
1585 include $(cmd_files)
1586endif
1587
1da177e4
LT
1588endif # skip-makefile
1589
4f193362 1590PHONY += FORCE
1da177e4 1591FORCE:
4f193362 1592
4f193362 1593# Declare the contents of the .PHONY variable as phony. We keep that
fe8d0a41 1594# information in a variable so we can use it in if_changed and friends.
4f193362 1595.PHONY: $(PHONY)