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kbuild: simplify build, clean, modbuiltin shorthands
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55922c9d 1VERSION = 3
7d1311b9 2PATCHLEVEL = 17
55922c9d 3SUBLEVEL = 0
7d1311b9 4EXTRAVERSION = -rc1
38dbfb59 5NAME = Shuffling Zombie Juror
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
7ff52571
MY
13# Do not use make's built-in rules and variables
14# (this increases performance and avoids hard-to-debug behaviour);
15MAKEFLAGS += -rR
1da177e4 16
c051346b 17# Avoid funny character set dependencies
06b5dc64 18unexport LC_ALL
c051346b
PA
19LC_COLLATE=C
20LC_NUMERIC=C
07105202 21export LC_COLLATE LC_NUMERIC
c051346b 22
ab7474ea
BP
23# Avoid interference with shell env settings
24unexport GREP_OPTIONS
25
1da177e4
LT
26# We are using a recursive build, so we need to do a little thinking
27# to get the ordering right.
28#
29# Most importantly: sub-Makefiles should only ever modify files in
30# their own directory. If in some directory we have a dependency on
31# a file in another dir (which doesn't happen often, but it's often
32# unavoidable when linking the built-in.o targets which finally
33# turn into vmlinux), we will call a sub make in that other dir, and
34# after that we are sure that everything which is in that other dir
35# is now up to date.
36#
37# The only cases where we need to modify files which have global
38# effects are thus separated out and done before the recursive
39# descending is started. They are now explicitly listed as the
40# prepare rule.
41
066b7ed9
MM
42# Beautify output
43# ---------------------------------------------------------------------------
44#
45# Normally, we echo the whole command before executing it. By making
46# that echo $($(quiet)$(cmd)), we now have the possibility to set
47# $(quiet) to choose other forms of output instead, e.g.
48#
49# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
50# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
51#
52# If $(quiet) is empty, the whole command will be printed.
53# If it is set to "quiet_", only the short version will be printed.
54# If it is set to "silent_", nothing will be printed at all, since
55# the variable $(silent_cmd_cc_o_c) doesn't exist.
56#
57# A simple variant is to prefix commands with $(Q) - that's useful
58# for commands that shall be hidden in non-verbose mode.
59#
60# $(Q)ln $@ :<
61#
62# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
63# If KBUILD_VERBOSE equals 1 then the above command is displayed.
64#
1da177e4
LT
65# To put more focus on warnings, be less verbose as default
66# Use 'make V=1' to see the full commands
67
b8b0618c
CR
68ifeq ("$(origin V)", "command line")
69 KBUILD_VERBOSE = $(V)
1da177e4
LT
70endif
71ifndef KBUILD_VERBOSE
72 KBUILD_VERBOSE = 0
73endif
74
066b7ed9
MM
75ifeq ($(KBUILD_VERBOSE),1)
76 quiet =
77 Q =
78else
79 quiet=quiet_
80 Q = @
81endif
82
83# If the user is running make -s (silent mode), suppress echoing of
84# commands
85
86ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
87ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
88 quiet=silent_
89endif
90else # make-3.8x
91ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
92 quiet=silent_
93endif
94endif
95
96export quiet Q KBUILD_VERBOSE
97
1da177e4
LT
98# kbuild supports saving output files in a separate directory.
99# To locate output files in a separate directory two syntaxes are supported.
100# In both cases the working directory must be the root of the kernel src.
101# 1) O=
102# Use "make O=dir/to/store/output/files/"
070b98bf 103#
1da177e4
LT
104# 2) Set KBUILD_OUTPUT
105# Set the environment variable KBUILD_OUTPUT to point to the directory
106# where the output files shall be placed.
107# export KBUILD_OUTPUT=dir/to/store/output/files/
108# make
109#
110# The O= assignment takes precedence over the KBUILD_OUTPUT environment
111# variable.
112
1da177e4
LT
113# KBUILD_SRC is set on invocation of make in OBJ directory
114# KBUILD_SRC is not intended to be used by the regular user (for now)
115ifeq ($(KBUILD_SRC),)
116
117# OK, Make called in directory where kernel src resides
118# Do we want to locate output files in a separate directory?
b8b0618c
CR
119ifeq ("$(origin O)", "command line")
120 KBUILD_OUTPUT := $(O)
1da177e4
LT
121endif
122
123# That's our default target when none is given on the command line
4f193362 124PHONY := _all
1da177e4
LT
125_all:
126
1cacc9ab
SR
127# Cancel implicit rules on top Makefile
128$(CURDIR)/Makefile Makefile: ;
129
1da177e4
LT
130ifneq ($(KBUILD_OUTPUT),)
131# Invoke a second make in the output directory, passing relevant variables
132# check that the output directory actually exists
133saved-output := $(KBUILD_OUTPUT)
1c9e70a5
MY
134KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
135 && /bin/pwd)
1da177e4 136$(if $(KBUILD_OUTPUT),, \
1c9e70a5 137 $(error failed to create output directory "$(saved-output)"))
1da177e4 138
0b35786d
MM
139PHONY += $(MAKECMDGOALS) sub-make
140
1cacc9ab 141$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
16f89098 142 @:
0b35786d
MM
143
144sub-make: FORCE
745a2543 145 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
aa55c8e2 146 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
1da177e4
LT
147
148# Leave processing to above invocation of make
149skip-makefile := 1
150endif # ifneq ($(KBUILD_OUTPUT),)
151endif # ifeq ($(KBUILD_SRC),)
152
153# We process the rest of the Makefile if this is the final invocation of make
154ifeq ($(skip-makefile),)
155
7ff52571
MY
156# Do not print "Entering directory ...",
157# but we want to display it when entering to the output directory
158# so that IDEs/editors are able to understand relative filenames.
159MAKEFLAGS += --no-print-directory
160
aa55c8e2
MY
161# Call a source code checker (by default, "sparse") as part of the
162# C compilation.
163#
164# Use 'make C=1' to enable checking of only re-compiled files.
165# Use 'make C=2' to enable checking of *all* source files, regardless
166# of whether they are re-compiled or not.
167#
168# See the file "Documentation/sparse.txt" for more details, including
169# where to get the "sparse" utility.
170
171ifeq ("$(origin C)", "command line")
172 KBUILD_CHECKSRC = $(C)
173endif
174ifndef KBUILD_CHECKSRC
175 KBUILD_CHECKSRC = 0
176endif
177
178# Use make M=dir to specify directory of external module to build
179# Old syntax make ... SUBDIRS=$PWD is still supported
180# Setting the environment variable KBUILD_EXTMOD take precedence
181ifdef SUBDIRS
182 KBUILD_EXTMOD ?= $(SUBDIRS)
183endif
184
185ifeq ("$(origin M)", "command line")
186 KBUILD_EXTMOD := $(M)
187endif
188
1da177e4
LT
189# If building an external module we do not care about the all: rule
190# but instead _all depend on modules
4f193362 191PHONY += all
1da177e4
LT
192ifeq ($(KBUILD_EXTMOD),)
193_all: all
194else
195_all: modules
196endif
197
9da0763b
MM
198ifeq ($(KBUILD_SRC),)
199 # building in the source tree
200 srctree := .
201else
202 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
203 # building in a subdirectory of the source tree
204 srctree := ..
205 else
206 srctree := $(KBUILD_SRC)
207 endif
208endif
7e1c0477 209objtree := .
1da177e4
LT
210src := $(srctree)
211obj := $(objtree)
212
0f558c33 213VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1da177e4 214
11294235 215export srctree objtree VPATH
1da177e4 216
1da177e4
LT
217
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++
25583d4b 300HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
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
61163efa
BW
338ifneq ($(CC),)
339ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
340COMPILER := clang
341else
342COMPILER := gcc
343endif
344export COMPILER
345endif
1da177e4
LT
346
347# Look for make include files relative to root of kernel src
348MAKEFLAGS += --include-dir=$(srctree)
349
1cacc9ab
SR
350# We need some generic definitions (do not try to remake the file).
351$(srctree)/scripts/Kbuild.include: ;
15964864 352include $(srctree)/scripts/Kbuild.include
1da177e4
LT
353
354# Make variables (CC, etc...)
1da177e4
LT
355AS = $(CROSS_COMPILE)as
356LD = $(CROSS_COMPILE)ld
357CC = $(CROSS_COMPILE)gcc
358CPP = $(CC) -E
359AR = $(CROSS_COMPILE)ar
360NM = $(CROSS_COMPILE)nm
361STRIP = $(CROSS_COMPILE)strip
362OBJCOPY = $(CROSS_COMPILE)objcopy
363OBJDUMP = $(CROSS_COMPILE)objdump
364AWK = awk
365GENKSYMS = scripts/genksyms/genksyms
caa27b66 366INSTALLKERNEL := installkernel
1da177e4 367DEPMOD = /sbin/depmod
1da177e4 368PERL = perl
011bf125 369PYTHON = python
1da177e4
LT
370CHECK = sparse
371
80a7d1d9
HE
372CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
373 -Wbitwise -Wno-return-void $(CF)
6588169d
SR
374CFLAGS_MODULE =
375AFLAGS_MODULE =
376LDFLAGS_MODULE =
1da177e4
LT
377CFLAGS_KERNEL =
378AFLAGS_KERNEL =
2521f2c2 379CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
1da177e4
LT
380
381
abbf1590
DH
382# Use USERINCLUDE when you must reference the UAPI directories only.
383USERINCLUDE := \
384 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
385 -Iarch/$(hdr-arch)/include/generated/uapi \
386 -I$(srctree)/include/uapi \
387 -Iinclude/generated/uapi \
388 -include $(srctree)/include/linux/kconfig.h
389
1da177e4
LT
390# Use LINUXINCLUDE when you must reference the include/ directory.
391# Needed to be compatible with the O= option
abbf1590
DH
392LINUXINCLUDE := \
393 -I$(srctree)/arch/$(hdr-arch)/include \
394 -Iarch/$(hdr-arch)/include/generated \
395 $(if $(KBUILD_SRC), -I$(srctree)/include) \
396 -Iinclude \
397 $(USERINCLUDE)
1da177e4 398
d8672b40 399KBUILD_CPPFLAGS := -D__KERNEL__
1da177e4 400
a0f97e06 401KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
94bed2a9 402 -fno-strict-aliasing -fno-common \
a8735821 403 -Werror-implicit-function-declaration \
a1c48bb1
GU
404 -Wno-format-security
405
80c00ba9
SR
406KBUILD_AFLAGS_KERNEL :=
407KBUILD_CFLAGS_KERNEL :=
222d394d 408KBUILD_AFLAGS := -D__ASSEMBLY__
6588169d
SR
409KBUILD_AFLAGS_MODULE := -DMODULE
410KBUILD_CFLAGS_MODULE := -DMODULE
411KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
1da177e4 412
f1d28fb0
RZ
413# Read KERNELRELEASE from include/config/kernel.release (if it exists)
414KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
cacd54ef 415KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
cb58455c 416
070b98bf 417export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 418export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
caa27b66 419export CPP AR NM STRIP OBJCOPY OBJDUMP
011bf125 420export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
070b98bf 421export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 422
06c5040c 423export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
2521f2c2 424export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
222d394d 425export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
6588169d 426export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
80c00ba9 427export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
40df759e 428export KBUILD_ARFLAGS
1da177e4
LT
429
430# When compiling out-of-tree modules, put MODVERDIR in the module
431# tree rather than in the kernel tree. The kernel tree might
432# even be read-only.
433export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
434
1da177e4
LT
435# Files to ignore in find ... statements
436
ae63b2d7
PB
437export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
438 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
439 -prune -o
450c6076
JJ
440export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
441 --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
442
443# ===========================================================================
444# Rules shared between *config targets and build targets
445
446# Basic helpers built in scripts/
4f193362 447PHONY += scripts_basic
1da177e4
LT
448scripts_basic:
449 $(Q)$(MAKE) $(build)=scripts/basic
638adb05 450 $(Q)rm -f .tmp_quiet_recordmcount
1da177e4 451
cd05e6bd
JB
452# To avoid any implicit rule to kick in, define an empty command.
453scripts/basic/%: scripts_basic ;
454
4f193362 455PHONY += outputmakefile
fd5f0cd6
JB
456# outputmakefile generates a Makefile in the output directory, if using a
457# separate output directory. This allows convenient use of make in the
458# output directory.
1da177e4 459outputmakefile:
fd5f0cd6 460ifneq ($(KBUILD_SRC),)
92979997 461 $(Q)ln -fsn $(srctree) source
fd5f0cd6
JB
462 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
463 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
464endif
1da177e4 465
d8ecc5cd
SR
466# Support for using generic headers in asm-generic
467PHONY += asm-generic
468asm-generic:
469 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
3c5994c8
CM
470 src=asm obj=arch/$(SRCARCH)/include/generated/asm
471 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
472 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
d8ecc5cd 473
1da177e4
LT
474# To make sure we do not include .config for any of the *config targets
475# catch them early, and hand them over to scripts/kconfig/Makefile
476# It is allowed to specify more targets when calling make, including
477# mixing *config targets and build targets.
070b98bf 478# For example 'make oldconfig all'.
1da177e4
LT
479# Detect when mixed targets is specified, and make a second invocation
480# of make so .config is not included in this case either (for *config).
481
10b63956 482version_h := include/generated/uapi/linux/version.h
d183e6f5 483
3eb3c740 484no-dot-config-targets := clean mrproper distclean \
f4ed1009 485 cscope gtags TAGS tags help %docs check% coccicheck \
d183e6f5 486 $(version_h) headers_% archheaders archscripts \
4aed2fd8 487 kernelversion %src-pkg
1da177e4
LT
488
489config-targets := 0
490mixed-targets := 0
491dot-config := 1
492
493ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
494 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
495 dot-config := 0
496 endif
497endif
498
499ifeq ($(KBUILD_EXTMOD),)
500 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
501 config-targets := 1
502 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
503 mixed-targets := 1
504 endif
505 endif
506endif
507
508ifeq ($(mixed-targets),1)
509# ===========================================================================
510# We're called with mixed targets (*config and build targets).
511# Handle them one by one.
512
9319f453
MY
513PHONY += $(MAKECMDGOALS) __build_one_by_one
514
515$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
516 @:
517
518__build_one_by_one:
519 $(Q)set -e; \
520 for i in $(MAKECMDGOALS); do \
521 $(MAKE) -f $(srctree)/Makefile $$i; \
522 done
1da177e4
LT
523
524else
525ifeq ($(config-targets),1)
526# ===========================================================================
527# *config targets only - make sure prerequisites are updated, and descend
528# in scripts/kconfig to make the *config target
529
530# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
531# KBUILD_DEFCONFIG may point out an alternative default configuration
532# used for 'make defconfig'
74b469f2 533include $(srctree)/arch/$(SRCARCH)/Makefile
61bee204 534export KBUILD_DEFCONFIG KBUILD_KCONFIG
1da177e4 535
31110ebb 536config: scripts_basic outputmakefile FORCE
31110ebb
SR
537 $(Q)$(MAKE) $(build)=scripts/kconfig $@
538
539%config: scripts_basic outputmakefile FORCE
1da177e4
LT
540 $(Q)$(MAKE) $(build)=scripts/kconfig $@
541
542else
543# ===========================================================================
544# Build targets only - this includes vmlinux, arch specific targets, clean
545# targets and others. In general all targets except *config targets.
546
547ifeq ($(KBUILD_EXTMOD),)
548# Additional helpers built in scripts/
549# Carefully list dependencies so we do not try to build scripts twice
070b98bf 550# in parallel
4f193362 551PHONY += scripts
a54292f5
AS
552scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
553 asm-generic
1da177e4
LT
554 $(Q)$(MAKE) $(build)=$(@)
555
1da177e4
LT
556# Objects we will link into vmlinux / subdirs we need to visit
557init-y := init/
4d2acfbf 558drivers-y := drivers/ sound/ firmware/
1da177e4
LT
559net-y := net/
560libs-y := lib/
561core-y := usr/
562endif # KBUILD_EXTMOD
563
564ifeq ($(dot-config),1)
9ee4e336
SR
565# Read in config
566-include include/config/auto.conf
1da177e4 567
9ee4e336 568ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
569# Read in dependencies to all Kconfig* files, make sure to run
570# oldconfig if changes are detected.
c955ccaf 571-include include/config/auto.conf.cmd
1da177e4 572
1da177e4 573# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 574$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 575
c955ccaf 576# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 577# with it and forgot to run make oldconfig.
070b98bf 578# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 579# we execute the config step to be sure to catch updated Kconfig files
bc081dd6 580include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 581 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 582else
264a2683 583# external modules needs include/generated/autoconf.h and include/config/auto.conf
9ee4e336
SR
584# but do not care if they are up-to-date. Use auto.conf to trigger the test
585PHONY += include/config/auto.conf
586
587include/config/auto.conf:
264a2683 588 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
5369f550
MM
589 echo >&2; \
590 echo >&2 " ERROR: Kernel configuration is invalid."; \
591 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
592 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
593 echo >&2 ; \
9ee4e336
SR
594 /bin/false)
595
596endif # KBUILD_EXTMOD
c955ccaf 597
1da177e4
LT
598else
599# Dummy target needed, because used as prerequisite
c955ccaf 600include/config/auto.conf: ;
9ee4e336 601endif # $(dot-config)
1da177e4
LT
602
603# The all: target is the default when no target is given on the
604# command line.
605# This allow a user to issue only 'make' to build a kernel including modules
c8447161 606# Defaults to vmlinux, but the arch makefile usually adds further targets
1da177e4
LT
607all: vmlinux
608
a1c48bb1
GU
609include $(srctree)/arch/$(SRCARCH)/Makefile
610
611KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
612
1da177e4 613ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
e74fc973 614KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
1da177e4 615else
a0f97e06 616KBUILD_CFLAGS += -O2
1da177e4
LT
617endif
618
69102311
JK
619# Tell gcc to never replace conditional load with a non-conditional one
620KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
621
1873e870
AK
622ifdef CONFIG_READABLE_ASM
623# Disable optimizations that make assembler listings hard to read.
624# reorder blocks reorders the control in the function
625# ipa clone creates specialized cloned functions
626# partial inlining inlines only parts of functions
627KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
628 $(call cc-option,-fno-ipa-cp-clone,) \
629 $(call cc-option,-fno-partial-inlining)
630endif
631
08f67461 632ifneq ($(CONFIG_FRAME_WARN),0)
35bb5b1e
AK
633KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
634endif
635
19952a92 636# Handle stack protector mode.
1332429b
KC
637#
638# Since kbuild can potentially perform two passes (first with the old
639# .config values and then with updated .config values), we cannot error out
640# if a desired compiler option is unsupported. If we were to error, kbuild
641# could never get to the second pass and actually notice that we changed
642# the option to something that was supported.
643#
644# Additionally, we don't want to fallback and/or silently change which compiler
645# flags will be used, since that leads to producing kernels with different
646# security feature characteristics depending on the compiler used. ("But I
647# selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
648#
649# The middle ground is to warn here so that the failed option is obvious, but
650# to let the build fail with bad compiler flags so that we can't produce a
651# kernel when there is a CONFIG and compiler mismatch.
652#
8779657d 653ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
19952a92
KC
654 stackp-flag := -fstack-protector
655 ifeq ($(call cc-option, $(stackp-flag)),)
6c15b327 656 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
27b2a49a 657 -fstack-protector not supported by compiler)
19952a92 658 endif
6c15b327
JB
659else
660ifdef CONFIG_CC_STACKPROTECTOR_STRONG
8779657d
KC
661 stackp-flag := -fstack-protector-strong
662 ifeq ($(call cc-option, $(stackp-flag)),)
663 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
664 -fstack-protector-strong not supported by compiler)
665 endif
19952a92
KC
666else
667 # Force off for distro compilers that enable stack protector by default.
668 stackp-flag := $(call cc-option, -fno-stack-protector)
5d707e9c 669endif
6c15b327 670endif
19952a92 671KBUILD_CFLAGS += $(stackp-flag)
e06b8b98 672
61163efa
BW
673ifeq ($(COMPILER),clang)
674KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
675KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
676KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
677KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
678KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
679# Quiet clang warning: comparison of unsigned expression < 0 is always false
680KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
681# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
682# source of a reference will be _MergedGlobals and not on of the whitelisted names.
683# See modpost pattern 2
684KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
26ea6bb1 685KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
61163efa
BW
686else
687
af0e5d56
DJ
688# This warning generated too much noise in a regular build.
689# Use make W=1 to enable this warning (see scripts/Makefile.build)
8417da6f 690KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
61163efa 691endif
af0e5d56 692
1da177e4 693ifdef CONFIG_FRAME_POINTER
a0f97e06 694KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 695else
7e9501fd
RV
696# Some targets (ARM with Thumb2, for example), can't be built with frame
697# pointers. For those, we don't have FUNCTION_TRACER automatically
698# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
699# incompatible with -fomit-frame-pointer with current GCC, so we don't use
700# -fomit-frame-pointer with FUNCTION_TRACER.
701ifndef CONFIG_FUNCTION_TRACER
a0f97e06 702KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4 703endif
7e9501fd 704endif
1da177e4 705
2062afb4
LT
706KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
707
1da177e4 708ifdef CONFIG_DEBUG_INFO
866ced95
AK
709ifdef CONFIG_DEBUG_INFO_SPLIT
710KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
711else
a0f97e06 712KBUILD_CFLAGS += -g
866ced95 713endif
2288328c 714KBUILD_AFLAGS += -Wa,-gdwarf-2
1da177e4 715endif
bfaf2dd3
AK
716ifdef CONFIG_DEBUG_INFO_DWARF4
717KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
718endif
1da177e4 719
d6f4ceb7 720ifdef CONFIG_DEBUG_INFO_REDUCED
e82c4bb8
AK
721KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
722 $(call cc-option,-fno-var-tracking)
d6f4ceb7
AK
723endif
724
606576ce 725ifdef CONFIG_FUNCTION_TRACER
a2546fae
SR
726ifdef CONFIG_HAVE_FENTRY
727CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
728endif
729KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
730KBUILD_AFLAGS += $(CC_USING_FENTRY)
72441cb1 731ifdef CONFIG_DYNAMIC_FTRACE
cf4db259 732 ifdef CONFIG_HAVE_C_RECORDMCOUNT
72441cb1
SR
733 BUILD_C_RECORDMCOUNT := y
734 export BUILD_C_RECORDMCOUNT
735 endif
736endif
16444a8a
ACM
737endif
738
91341d4b
SR
739# We trigger additional mismatches with less inlining
740ifdef CONFIG_DEBUG_SECTION_MISMATCH
741KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
742endif
743
e8e69931 744# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 745NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
746CHECKFLAGS += $(NOSTDINC_FLAGS)
747
1da177e4 748# warn about C99 declaration after statement
a0f97e06 749KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 750
070b98bf 751# disable pointer signed / unsigned warnings in gcc 4.0
8417da6f 752KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
1da177e4 753
fe8d0a41 754# disable invalid "can't wrap" optimizations for signed / pointers
a137802e 755KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
d0115552 756
8f7f5c9f
AK
757# conserve stack if available
758KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
759
80970472
ST
760# disallow errors like 'EXPORT_GPL(foo);' with missing header
761KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
762
763# require functions to have arguments in prototypes, not empty 'int foo()'
764KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
765
fe7c36c7
JT
766# Prohibit date/time macros, which would make the build non-deterministic
767KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
768
40df759e
MM
769# use the deterministic mode of AR if available
770KBUILD_ARFLAGS := $(call ar-option,D)
771
bf5438fc
JB
772# check for 'asm goto'
773ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
774 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
775endif
776
a86fe353
MY
777include $(srctree)/scripts/Makefile.extrawarn
778
06c5040c 779# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
70cfe026
OÇ
780KBUILD_CPPFLAGS += $(KCPPFLAGS)
781KBUILD_AFLAGS += $(KAFLAGS)
782KBUILD_CFLAGS += $(KCFLAGS)
52bcc330 783
18991197
RM
784# Use --build-id when available.
785LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
f86fd306 786 $(call cc-ldoption, -Wl$(comma)--build-id,))
6588169d 787KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
18991197
RM
788LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
789
5d7d18f5 790ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
d79a2719 791LDFLAGS_vmlinux += $(call ld-option, -X,)
5d7d18f5
DH
792endif
793
1da177e4 794# Default kernel image to build when no specific target is given.
070b98bf 795# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
796# set in the environment
797# Also any assignments in arch/$(ARCH)/Makefile take precedence over
798# this default value
799export KBUILD_IMAGE ?= vmlinux
800
801#
802# INSTALL_PATH specifies where to place the updated kernel and system map
803# images. Default is /boot, but you can set it to other values
804export INSTALL_PATH ?= /boot
805
f4d4ffc0
JC
806#
807# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
808# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
809# an argument if needed. Otherwise it defaults to the kernel install path
810#
811export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
812
1da177e4
LT
813#
814# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
815# relocations required by build roots. This is not defined in the
070b98bf 816# makefile but the argument can be passed to make if needed.
1da177e4
LT
817#
818
df9df036 819MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
820export MODLIB
821
ac031f26 822#
3fbb43df
MY
823# INSTALL_MOD_STRIP, if defined, will cause modules to be
824# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
825# the default option --strip-debug will be used. Otherwise,
826# INSTALL_MOD_STRIP value will be used as the options to the strip command.
2ea03891 827
ac031f26
TT
828ifdef INSTALL_MOD_STRIP
829ifeq ($(INSTALL_MOD_STRIP),1)
2ea03891 830mod_strip_cmd = $(STRIP) --strip-debug
ac031f26 831else
2ea03891 832mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
ac031f26
TT
833endif # INSTALL_MOD_STRIP=1
834else
2ea03891 835mod_strip_cmd = true
ac031f26
TT
836endif # INSTALL_MOD_STRIP
837export mod_strip_cmd
838
1bf49dd4 839# Select initial ramdisk compression format, default is gzip(1).
840# This shall be used by the dracut(8) tool while creating an initramfs image.
841#
7ac18156
JB
842INITRD_COMPRESS-y := gzip
843INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
844INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
845INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
846INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
847INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
b7000ade
LT
848# do not export INITRD_COMPRESS, since we didn't actually
849# choose a sane default compression above.
850# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1da177e4 851
d9d8d7ed 852ifdef CONFIG_MODULE_SIG_ALL
e2a666d5
RR
853MODSECKEY = ./signing_key.priv
854MODPUBKEY = ./signing_key.x509
855export MODPUBKEY
4bc9410c 856mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
e2a666d5
RR
857else
858mod_sign_cmd = true
859endif
860export mod_sign_cmd
861
862
1da177e4 863ifeq ($(KBUILD_EXTMOD),)
3a65dfe8 864core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
865
866vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
867 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
868 $(net-y) $(net-m) $(libs-y) $(libs-m)))
869
870vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
871 $(init-n) $(init-) \
872 $(core-n) $(core-) $(drivers-n) $(drivers-) \
873 $(net-n) $(net-) $(libs-n) $(libs-))))
874
875init-y := $(patsubst %/, %/built-in.o, $(init-y))
876core-y := $(patsubst %/, %/built-in.o, $(core-y))
877drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
878net-y := $(patsubst %/, %/built-in.o, $(net-y))
879libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
880libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
881libs-y := $(libs-y1) $(libs-y2)
882
1f2bfbd0 883# Externally visible symbols (used by link-vmlinux.sh)
95698570
SR
884export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
885export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
886export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1f2bfbd0 887export LDFLAGS_vmlinux
6615d6c3
MM
888# used by scripts/pacmage/Makefile
889export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
9bb48247 890
1f2bfbd0 891vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
1da177e4 892
1f2bfbd0
SR
893# Final link of vmlinux
894 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
895quiet_cmd_link-vmlinux = LINK $@
1da177e4 896
1f2bfbd0
SR
897# Include targets which we want to
898# execute if the rest of the kernel build went well.
899vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
0f836e5f 900ifdef CONFIG_HEADERS_CHECK
0e7af8d0 901 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025
MD
902endif
903ifdef CONFIG_SAMPLES
904 $(Q)$(MAKE) $(build)=samples
3794f3e8
RD
905endif
906ifdef CONFIG_BUILD_DOCSRC
907 $(Q)$(MAKE) $(build)=Documentation
0f836e5f 908endif
1f2bfbd0 909 +$(call if_changed,link-vmlinux)
741f98fe 910
38385f8f 911# The actual objects are generated when descending,
1da177e4 912# make sure no implicit rule kicks in
1f2bfbd0 913$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1da177e4
LT
914
915# Handle descending into subdirectories listed in $(vmlinux-dirs)
916# Preset locale variables to speed up the build process. Limit locale
917# tweaks to this spot to avoid wrong language settings when running
918# make menuconfig etc.
919# Error messages still appears in the original language
920
4f193362 921PHONY += $(vmlinux-dirs)
5bb78269 922$(vmlinux-dirs): prepare scripts
1da177e4
LT
923 $(Q)$(MAKE) $(build)=$@
924
0d0e7718
MM
925define filechk_kernel.release
926 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
927endef
928
83a35e36 929# Store (new) KERNELRELEASE string in include/config/kernel.release
f1d28fb0 930include/config/kernel.release: include/config/auto.conf FORCE
0d0e7718 931 $(call filechk,kernel.release)
cb58455c
SR
932
933
1da177e4 934# Things we need to do before we recursively start building the kernel
5bb78269
SR
935# or the modules are listed in "prepare".
936# A multi level approach is used. prepareN is processed before prepareN-1.
937# archprepare is used in arch Makefiles and when processed asm symlink,
938# version.h and scripts_basic is processed / created.
1da177e4 939
5bb78269 940# Listed in dependency order
4f193362 941PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 942
86feeaa8 943# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
944# and if so do:
945# 1) Check that make has not been executed in the kernel src $(srctree)
f1d28fb0 946prepare3: include/config/kernel.release
1da177e4 947ifneq ($(KBUILD_SRC),)
fd54f502 948 @$(kecho) ' Using $(srctree) as source for kernel'
c955ccaf 949 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
5369f550
MM
950 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
951 echo >&2 " in the '$(srctree)' directory.";\
1da177e4
LT
952 /bin/false; \
953 fi;
1da177e4
LT
954endif
955
86feeaa8 956# prepare2 creates a makefile if using a separate output directory
d8ecc5cd 957prepare2: prepare3 outputmakefile asm-generic
1da177e4 958
d183e6f5 959prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
f7f16b77 960 include/config/auto.conf
7bb9d092 961 $(cmd_crmodverdir)
1da177e4 962
6520fe55 963archprepare: archheaders archscripts prepare1 scripts_basic
5bb78269
SR
964
965prepare0: archprepare FORCE
8d36a623 966 $(Q)$(MAKE) $(build)=.
86feeaa8 967
1da177e4 968# All the preparing..
d395efb5 969prepare: prepare0
1da177e4 970
1da177e4
LT
971# Generate some files
972# ---------------------------------------------------------------------------
973
974# KERNELRELEASE can change from a few different places, meaning version.h
975# needs to be updated, so this check is forced on all builds
976
977uts_len := 64
63104eec
SR
978define filechk_utsrelease.h
979 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
980 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
981 exit 1; \
982 fi; \
983 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
984endef
1da177e4
LT
985
986define filechk_version.h
450c6076
JJ
987 (echo \#define LINUX_VERSION_CODE $(shell \
988 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
63104eec 989 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
990endef
991
d183e6f5 992$(version_h): $(srctree)/Makefile FORCE
1da177e4
LT
993 $(call filechk,version.h)
994
273b281f 995include/generated/utsrelease.h: include/config/kernel.release FORCE
63104eec
SR
996 $(call filechk,utsrelease.h)
997
179efcb4
VN
998PHONY += headerdep
999headerdep:
9663d989
PF
1000 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1001 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
179efcb4 1002
1da177e4
LT
1003# ---------------------------------------------------------------------------
1004
4f193362 1005PHONY += depend dep
1da177e4
LT
1006depend dep:
1007 @echo '*** Warning: make $@ is unnecessary now.'
1008
88ecf814
DW
1009# ---------------------------------------------------------------------------
1010# Firmware install
1011INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1012export INSTALL_FW_PATH
1013
1014PHONY += firmware_install
1015firmware_install: FORCE
1016 @mkdir -p $(objtree)/firmware
1017 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1018
8d730cfb
DW
1019# ---------------------------------------------------------------------------
1020# Kernel headers
8d730cfb 1021
e6883b18
SR
1022#Default location for installed headers
1023export INSTALL_HDR_PATH = $(objtree)/usr
6d716275 1024
e6883b18 1025hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
2fb9b1bd
SR
1026
1027# If we do an all arch process set dst to asm-$(hdr-arch)
1028hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
e6883b18 1029
052ad274
PA
1030PHONY += archheaders
1031archheaders:
1032
6520fe55
PA
1033PHONY += archscripts
1034archscripts:
1035
e6883b18 1036PHONY += __headers
d183e6f5 1037__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
e1b702cf 1038 $(Q)$(MAKE) $(build)=scripts build_unifdef
e6883b18
SR
1039
1040PHONY += headers_install_all
2fb9b1bd
SR
1041headers_install_all:
1042 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
6d716275 1043
8d730cfb 1044PHONY += headers_install
e6883b18 1045headers_install: __headers
10b63956
DH
1046 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1047 $(error Headers not exportable for the $(SRCARCH) architecture))
1048 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1049 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
8d730cfb 1050
1f85712e
MF
1051PHONY += headers_check_all
1052headers_check_all: headers_install_all
2fb9b1bd 1053 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1f85712e 1054
68475359
DW
1055PHONY += headers_check
1056headers_check: headers_install
10b63956
DH
1057 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1058 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
68475359 1059
5a5da78b
SK
1060# ---------------------------------------------------------------------------
1061# Kernel selftest
1062
1063PHONY += kselftest
1064kselftest:
1065 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1066
1da177e4
LT
1067# ---------------------------------------------------------------------------
1068# Modules
1069
1070ifdef CONFIG_MODULES
1071
070b98bf 1072# By default, build modules as well
1da177e4 1073
73d1393e 1074all: modules
1da177e4 1075
3fbb43df 1076# Build modules
551559e1 1077#
3fbb43df
MY
1078# A module can be listed more than once in obj-m resulting in
1079# duplicate lines in modules.order files. Those are removed
1080# using awk while concatenating to the final file.
1da177e4 1081
4f193362 1082PHONY += modules
2da30e70 1083modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
551559e1 1084 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
fd54f502 1085 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1086 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
44463f7d 1087 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1da177e4 1088
a6c36632
MM
1089modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1090 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1091
73d1393e 1092%/modules.builtin: include/config/auto.conf
a6c36632
MM
1093 $(Q)$(MAKE) $(modbuiltin)=$*
1094
1da177e4
LT
1095
1096# Target to prepare building external modules
4f193362 1097PHONY += modules_prepare
5bb78269 1098modules_prepare: prepare scripts
1da177e4
LT
1099
1100# Target to install modules
4f193362 1101PHONY += modules_install
1da177e4
LT
1102modules_install: _modinst_ _modinst_post
1103
4f193362 1104PHONY += _modinst_
2da30e70 1105_modinst_:
1da177e4
LT
1106 @rm -rf $(MODLIB)/kernel
1107 @rm -f $(MODLIB)/source
1108 @mkdir -p $(MODLIB)/kernel
890676c6 1109 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1da177e4
LT
1110 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1111 rm -f $(MODLIB)/build ; \
7e1c0477 1112 ln -s $(CURDIR) $(MODLIB)/build ; \
1da177e4 1113 fi
551559e1 1114 @cp -f $(objtree)/modules.order $(MODLIB)/
bc081dd6 1115 @cp -f $(objtree)/modules.builtin $(MODLIB)/
b805aa0e 1116 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1117
50a8ec31 1118# This depmod is only for convenience to give the initial
1da177e4
LT
1119# boot a modules.dep even before / is mounted read-write. However the
1120# boot script depmod is the master version.
4f193362 1121PHONY += _modinst_post
6d128e1e 1122_modinst_post: _modinst_
88ecf814 1123 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
50a8ec31 1124 $(call cmd,depmod)
1da177e4 1125
d890f510
JB
1126ifeq ($(CONFIG_MODULE_SIG), y)
1127PHONY += modules_sign
1128modules_sign:
1129 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1130endif
1131
1da177e4
LT
1132else # CONFIG_MODULES
1133
1134# Modules not configured
1135# ---------------------------------------------------------------------------
1136
1137modules modules_install: FORCE
5369f550
MM
1138 @echo >&2
1139 @echo >&2 "The present kernel configuration has modules disabled."
1140 @echo >&2 "Type 'make config' and enable loadable module support."
1141 @echo >&2 "Then build a kernel with module support enabled."
1142 @echo >&2
1da177e4
LT
1143 @exit 1
1144
1145endif # CONFIG_MODULES
1146
1da177e4
LT
1147###
1148# Cleaning is done on three levels.
1149# make clean Delete most generated files
1150# Leave enough to build external modules
1151# make mrproper Delete the current configuration, and all generated files
1152# make distclean Remove editor backup files, patch leftover files and the like
1153
1154# Directories & files removed with 'make clean'
1155CLEAN_DIRS += $(MODVERDIR)
1da177e4
LT
1156
1157# Directories & files removed with 'make mrproper'
d8ecc5cd 1158MRPROPER_DIRS += include/config usr/include include/generated \
3fbb43df 1159 arch/*/include/generated .tmp_objdiff
d183e6f5 1160MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
d5b71936
RR
1161 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1162 signing_key.priv signing_key.x509 x509.genkey \
1163 extra_certificates signing_key.x509.keyid \
9c8cdb71 1164 signing_key.x509.signer include/linux/version.h
1da177e4
LT
1165
1166# clean - Delete most, but leave enough to build external modules
1167#
1168clean: rm-dirs := $(CLEAN_DIRS)
1169clean: rm-files := $(CLEAN_FILES)
fb68d4be 1170clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1da177e4 1171
bd1ee804 1172PHONY += $(clean-dirs) clean archclean vmlinuxclean
1da177e4
LT
1173$(clean-dirs):
1174 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1175
bd1ee804
PM
1176vmlinuxclean:
1177 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1178
1179clean: archclean vmlinuxclean
1da177e4
LT
1180
1181# mrproper - Delete all generated files, including .config
1182#
1183mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1184mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1185mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1186
4f193362 1187PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1188$(mrproper-dirs):
1189 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1190
1191mrproper: clean archmrproper $(mrproper-dirs)
1192 $(call cmd,rmdirs)
1193 $(call cmd,rmfiles)
1194
1195# distclean
1196#
4f193362 1197PHONY += distclean
1da177e4
LT
1198
1199distclean: mrproper
1200 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1201 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1202 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
a03fcb50 1203 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
1da177e4
LT
1204 -type f -print | xargs rm -f
1205
1206
1207# Packaging of the kernel to various formats
1208# ---------------------------------------------------------------------------
1209# rpm target kept for backward compatibility
c79624c1 1210package-dir := scripts/package
1da177e4 1211
bafb6747
ACM
1212%src-pkg: FORCE
1213 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1214%pkg: include/config/kernel.release FORCE
6c2133e1 1215 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1216rpm: include/config/kernel.release FORCE
6c2133e1 1217 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1218
1219
1220# Brief documentation of the typical targets used
1221# ---------------------------------------------------------------------------
1222
5dffbe81 1223boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1da177e4 1224boards := $(notdir $(boards))
5dffbe81
SB
1225board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1226board-dirs := $(sort $(notdir $(board-dirs:/=)))
1da177e4
LT
1227
1228help:
1229 @echo 'Cleaning targets:'
5ea084ef 1230 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1231 @echo ' enough build support to build external modules'
5ea084ef 1232 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1233 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1234 @echo ''
1235 @echo 'Configuration targets:'
1236 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1237 @echo ''
1238 @echo 'Other generic targets:'
1239 @echo ' all - Build all targets marked with [*]'
1240 @echo '* vmlinux - Build the bare kernel'
1241 @echo '* modules - Build all modules'
9cc5d74c 1242 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
88ecf814
DW
1243 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1244 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1da177e4 1245 @echo ' dir/ - Build all files in dir and below'
62718979
JP
1246 @echo ' dir/file.[oisS] - Build specified target only'
1247 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1248 @echo ' (requires a recent binutils and recent build (System.map))'
155ad605 1249 @echo ' dir/file.ko - Build module including final link'
c4d5ee67 1250 @echo ' modules_prepare - Set up for building external modules'
1da177e4
LT
1251 @echo ' tags/TAGS - Generate tags file for editors'
1252 @echo ' cscope - Generate cscope index'
f4ed1009 1253 @echo ' gtags - Generate GNU GLOBAL index'
3f1d9a6c
MM
1254 @echo ' kernelrelease - Output the release version string (use with make -s)'
1255 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1256 @echo ' image_name - Output the image name (use with make -s)'
2fb9b1bd 1257 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1258 echo ' (default: $(INSTALL_HDR_PATH))'; \
2fb9b1bd 1259 echo ''
1da177e4 1260 @echo 'Static analysers'
1da177e4
LT
1261 @echo ' checkstack - Generate a list of stack hogs'
1262 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1263 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1264 @echo ' includecheck - Check for duplicate included header files'
295ac051 1265 @echo ' export_report - List the usages of all exported symbols'
179efcb4 1266 @echo ' headers_check - Sanity check on exported headers'
74425eee
NP
1267 @echo ' headerdep - Detect inclusion cycles in headers'
1268 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1269 @echo ''
5a5da78b
SK
1270 @echo 'Kernel selftest'
1271 @echo ' kselftest - Build and run kernel selftest (run as root)'
1272 @echo ' Build, install, and boot kernel before'
1273 @echo ' running kselftest on it'
1274 @echo ''
1da177e4 1275 @echo 'Kernel packaging:'
6c2133e1 1276 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1277 @echo ''
1278 @echo 'Documentation targets:'
1279 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1280 @echo ''
01dee188 1281 @echo 'Architecture specific targets ($(SRCARCH)):'
1da177e4 1282 @$(if $(archhelp),$(archhelp),\
01dee188 1283 echo ' No architecture specific help defined for $(SRCARCH)')
1da177e4
LT
1284 @echo ''
1285 @$(if $(boards), \
1286 $(foreach b, $(boards), \
1287 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1288 echo '')
5dffbe81
SB
1289 @$(if $(board-dirs), \
1290 $(foreach b, $(board-dirs), \
1291 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1292 printf " %-16s - Show all of the above\\n" help-boards; \
1293 echo '')
1da177e4
LT
1294
1295 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1296 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1297 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1298 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1299 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
af07ce3e 1300 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
28bc20dc
SR
1301 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1302 @echo ' 1: warnings which may be relevant and do not occur too often'
1303 @echo ' 2: warnings which occur quite often but may still be relevant'
1304 @echo ' 3: more obscure warnings, can most likely be ignored'
a6de553d 1305 @echo ' Multiple levels can be combined with W=12 or W=123'
1da177e4
LT
1306 @echo ''
1307 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1308 @echo 'For further info see the ./README file'
1309
1310
5dffbe81
SB
1311help-board-dirs := $(addprefix help-,$(board-dirs))
1312
1313help-boards: $(help-board-dirs)
1314
1315boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1316
1317$(help-board-dirs): help-%:
1318 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1319 @$(if $(boards-per-dir), \
1320 $(foreach b, $(boards-per-dir), \
1321 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1322 echo '')
1323
1324
1da177e4
LT
1325# Documentation targets
1326# ---------------------------------------------------------------------------
1327%docs: scripts_basic FORCE
bffd2020 1328 $(Q)$(MAKE) $(build)=scripts build_docproc
1da177e4
LT
1329 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1330
1331else # KBUILD_EXTMOD
1332
1333###
1334# External module support.
1335# When building external modules the kernel used as basis is considered
1336# read-only, and no consistency checks are made and the make
1337# system is not used on the basis kernel. If updates are required
1338# in the basis kernel ordinary make commands (without M=...) must
1339# be used.
1340#
1341# The following are the only valid targets when building external
1342# modules.
1343# make M=dir clean Delete all automatically generated files
1344# make M=dir modules Make all modules in specified dir
1345# make M=dir Same as 'make M=dir modules'
1346# make M=dir modules_install
070b98bf 1347# Install the modules built in the module directory
1da177e4
LT
1348# Assumes install directory is already created
1349
1350# We are always building modules
1351KBUILD_MODULES := 1
4f193362 1352PHONY += crmodverdir
1da177e4 1353crmodverdir:
7bb9d092 1354 $(cmd_crmodverdir)
1da177e4 1355
4f193362 1356PHONY += $(objtree)/Module.symvers
1da177e4
LT
1357$(objtree)/Module.symvers:
1358 @test -e $(objtree)/Module.symvers || ( \
1359 echo; \
1360 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1361 echo " is missing; modules will have no dependencies and modversions."; \
1362 echo )
1363
1364module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1365PHONY += $(module-dirs) modules
1da177e4
LT
1366$(module-dirs): crmodverdir $(objtree)/Module.symvers
1367 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1368
1369modules: $(module-dirs)
fd54f502 1370 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1371 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1372
4f193362 1373PHONY += modules_install
a67dc21a 1374modules_install: _emodinst_ _emodinst_post
e6304663 1375
4f193362
PS
1376install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1377PHONY += _emodinst_
a67dc21a 1378_emodinst_:
a67dc21a 1379 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1380 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1381
4f193362 1382PHONY += _emodinst_post
a67dc21a
SR
1383_emodinst_post: _emodinst_
1384 $(call cmd,depmod)
1385
1da177e4
LT
1386clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1387
4f193362 1388PHONY += $(clean-dirs) clean
1da177e4
LT
1389$(clean-dirs):
1390 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1391
1392clean: rm-dirs := $(MODVERDIR)
88d7be03 1393clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1da177e4
LT
1394
1395help:
1396 @echo ' Building external modules.'
1397 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1398 @echo ''
1399 @echo ' modules - default target, build the module(s)'
1400 @echo ' modules_install - install the module'
1401 @echo ' clean - remove generated files in module directory only'
1402 @echo ''
06300b21
SR
1403
1404# Dummies...
4f193362 1405PHONY += prepare scripts
06300b21
SR
1406prepare: ;
1407scripts: ;
1da177e4
LT
1408endif # KBUILD_EXTMOD
1409
88d7be03
MM
1410clean: $(clean-dirs)
1411 $(call cmd,rmdirs)
1412 $(call cmd,rmfiles)
43f67c98 1413 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
88d7be03 1414 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
addbcdbb 1415 -o -name '*.ko.*' \
866ced95 1416 -o -name '*.dwo' \
88d7be03
MM
1417 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1418 -o -name '*.symtypes' -o -name 'modules.order' \
1419 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1420 -o -name '*.gcno' \) -type f -print | xargs rm -f
1421
1da177e4
LT
1422# Generate tags for editors
1423# ---------------------------------------------------------------------------
a680eedc
SR
1424quiet_cmd_tags = GEN $@
1425 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1da177e4 1426
f4ed1009 1427tags TAGS cscope gtags: FORCE
1da177e4
LT
1428 $(call cmd,tags)
1429
1da177e4
LT
1430# Scripts to check various things for consistency
1431# ---------------------------------------------------------------------------
1432
279f3dd3
PF
1433PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1434
1da177e4 1435includecheck:
436f876c 1436 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1437 -name '*.[hcS]' -type f -print | sort \
80007434 1438 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1439
1440versioncheck:
2ee2d292 1441 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1442 -name '*.[hcS]' -type f -print | sort \
80007434 1443 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1444
74425eee
NP
1445coccicheck:
1446 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1447
1da177e4
LT
1448namespacecheck:
1449 $(PERL) $(srctree)/scripts/namespace.pl
1450
295ac051
AB
1451export_report:
1452 $(PERL) $(srctree)/scripts/export_report.pl
1453
1da177e4
LT
1454endif #ifeq ($(config-targets),1)
1455endif #ifeq ($(mixed-targets),1)
1456
c398ff00 1457PHONY += checkstack kernelrelease kernelversion image_name
e3ccf6e3 1458
011e3a9a
JD
1459# UML needs a little special treatment here. It wants to use the host
1460# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1461# else wants $(ARCH), including people doing cross-builds, which means
1462# that $(SUBARCH) doesn't work here.
1463ifeq ($(ARCH), um)
1464CHECKSTACK_ARCH := $(SUBARCH)
1465else
1466CHECKSTACK_ARCH := $(ARCH)
1467endif
1da177e4
LT
1468checkstack:
1469 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1470 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4 1471
7b8ea53d
AW
1472kernelrelease:
1473 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
01ab1788 1474
cb58455c 1475kernelversion:
2244cbd8 1476 @echo $(KERNELVERSION)
1da177e4 1477
c398ff00
MM
1478image_name:
1479 @echo $(KBUILD_IMAGE)
1480
ea01fa9f
BP
1481# Clear a bunch of variables before executing the submake
1482tools/: FORCE
bf35182f 1483 $(Q)mkdir -p $(objtree)/tools
a50e4333 1484 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
ea01fa9f
BP
1485
1486tools/%: FORCE
bf35182f 1487 $(Q)mkdir -p $(objtree)/tools
a50e4333 1488 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
ea01fa9f 1489
06300b21
SR
1490# Single targets
1491# ---------------------------------------------------------------------------
bc2546a6 1492# Single targets are compatible with:
e1b8513d 1493# - build with mixed source and output
bc2546a6
SR
1494# - build with separate output dir 'make O=...'
1495# - external modules
1496#
1497# target-dir => where to store outputfile
1498# build-dir => directory in kernel source tree to use
1499
1500ifeq ($(KBUILD_EXTMOD),)
aa360879 1501 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1502 target-dir = $(dir $@)
1503else
1504 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1505 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1506 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1507endif
1508
f6ecebd6 1509%.s: %.c prepare scripts FORCE
bc2546a6 1510 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1511%.i: %.c prepare scripts FORCE
bc2546a6 1512 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1513%.o: %.c prepare scripts FORCE
bc2546a6 1514 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1515%.lst: %.c prepare scripts FORCE
bc2546a6 1516 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1517%.s: %.S prepare scripts FORCE
bc2546a6 1518 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1519%.o: %.S prepare scripts FORCE
bc2546a6 1520 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1521%.symtypes: %.c prepare scripts FORCE
1522 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1523
bc2546a6 1524# Modules
31110ebb
SR
1525/: prepare scripts FORCE
1526 $(cmd_crmodverdir)
1527 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1528 $(build)=$(build-dir)
1529%/: prepare scripts FORCE
7bb9d092 1530 $(cmd_crmodverdir)
06300b21 1531 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1532 $(build)=$(build-dir)
1533%.ko: prepare scripts FORCE
7bb9d092 1534 $(cmd_crmodverdir)
06300b21 1535 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1536 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1537 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1538
38385f8f 1539# FIXME Should go into a make.lib or something
1da177e4
LT
1540# ===========================================================================
1541
1542quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1543 cmd_rmdirs = rm -rf $(rm-dirs)
1544
1545quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1546 cmd_rmfiles = rm -f $(rm-files)
1547