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mac80211: fix typo in starting baserate for rts_cts_rate_idx
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55922c9d 1VERSION = 3
7d1311b9 2PATCHLEVEL = 17
55922c9d 3SUBLEVEL = 0
bfe01a5b 4EXTRAVERSION =
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
15964864
OV
13# Do not:
14# o use make's built-in rules and variables
d384e35a 15# (this increases performance and avoids hard-to-debug behaviour);
15964864
OV
16# o print "Entering directory ...";
17MAKEFLAGS += -rR --no-print-directory
1da177e4 18
c051346b 19# Avoid funny character set dependencies
06b5dc64 20unexport LC_ALL
c051346b
PA
21LC_COLLATE=C
22LC_NUMERIC=C
07105202 23export LC_COLLATE LC_NUMERIC
c051346b 24
ab7474ea
BP
25# Avoid interference with shell env settings
26unexport GREP_OPTIONS
27
1da177e4
LT
28# We are using a recursive build, so we need to do a little thinking
29# to get the ordering right.
30#
31# Most importantly: sub-Makefiles should only ever modify files in
32# their own directory. If in some directory we have a dependency on
33# a file in another dir (which doesn't happen often, but it's often
34# unavoidable when linking the built-in.o targets which finally
35# turn into vmlinux), we will call a sub make in that other dir, and
36# after that we are sure that everything which is in that other dir
37# is now up to date.
38#
39# The only cases where we need to modify files which have global
40# effects are thus separated out and done before the recursive
41# descending is started. They are now explicitly listed as the
42# prepare rule.
43
066b7ed9
MM
44# Beautify output
45# ---------------------------------------------------------------------------
46#
47# Normally, we echo the whole command before executing it. By making
48# that echo $($(quiet)$(cmd)), we now have the possibility to set
49# $(quiet) to choose other forms of output instead, e.g.
50#
51# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
52# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
53#
54# If $(quiet) is empty, the whole command will be printed.
55# If it is set to "quiet_", only the short version will be printed.
56# If it is set to "silent_", nothing will be printed at all, since
57# the variable $(silent_cmd_cc_o_c) doesn't exist.
58#
59# A simple variant is to prefix commands with $(Q) - that's useful
60# for commands that shall be hidden in non-verbose mode.
61#
62# $(Q)ln $@ :<
63#
64# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
65# If KBUILD_VERBOSE equals 1 then the above command is displayed.
66#
1da177e4
LT
67# To put more focus on warnings, be less verbose as default
68# Use 'make V=1' to see the full commands
69
b8b0618c
CR
70ifeq ("$(origin V)", "command line")
71 KBUILD_VERBOSE = $(V)
1da177e4
LT
72endif
73ifndef KBUILD_VERBOSE
74 KBUILD_VERBOSE = 0
75endif
76
066b7ed9
MM
77ifeq ($(KBUILD_VERBOSE),1)
78 quiet =
79 Q =
80else
81 quiet=quiet_
82 Q = @
83endif
84
85# If the user is running make -s (silent mode), suppress echoing of
86# commands
87
88ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
89ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
90 quiet=silent_
91endif
92else # make-3.8x
93ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
94 quiet=silent_
95endif
96endif
97
98export quiet Q KBUILD_VERBOSE
99
1c7bafe7
RD
100# Call a source code checker (by default, "sparse") as part of the
101# C compilation.
102#
103# Use 'make C=1' to enable checking of only re-compiled files.
104# Use 'make C=2' to enable checking of *all* source files, regardless
105# of whether they are re-compiled or not.
106#
107# See the file "Documentation/sparse.txt" for more details, including
108# where to get the "sparse" utility.
1da177e4 109
b8b0618c
CR
110ifeq ("$(origin C)", "command line")
111 KBUILD_CHECKSRC = $(C)
1da177e4
LT
112endif
113ifndef KBUILD_CHECKSRC
114 KBUILD_CHECKSRC = 0
115endif
116
117# Use make M=dir to specify directory of external module to build
118# Old syntax make ... SUBDIRS=$PWD is still supported
119# Setting the environment variable KBUILD_EXTMOD take precedence
120ifdef SUBDIRS
121 KBUILD_EXTMOD ?= $(SUBDIRS)
122endif
1da177e4 123
b8b0618c
CR
124ifeq ("$(origin M)", "command line")
125 KBUILD_EXTMOD := $(M)
126endif
1da177e4
LT
127
128# kbuild supports saving output files in a separate directory.
129# To locate output files in a separate directory two syntaxes are supported.
130# In both cases the working directory must be the root of the kernel src.
131# 1) O=
132# Use "make O=dir/to/store/output/files/"
070b98bf 133#
1da177e4
LT
134# 2) Set KBUILD_OUTPUT
135# Set the environment variable KBUILD_OUTPUT to point to the directory
136# where the output files shall be placed.
137# export KBUILD_OUTPUT=dir/to/store/output/files/
138# make
139#
140# The O= assignment takes precedence over the KBUILD_OUTPUT environment
141# variable.
142
143
144# KBUILD_SRC is set on invocation of make in OBJ directory
145# KBUILD_SRC is not intended to be used by the regular user (for now)
146ifeq ($(KBUILD_SRC),)
147
148# OK, Make called in directory where kernel src resides
149# Do we want to locate output files in a separate directory?
b8b0618c
CR
150ifeq ("$(origin O)", "command line")
151 KBUILD_OUTPUT := $(O)
1da177e4
LT
152endif
153
154# That's our default target when none is given on the command line
4f193362 155PHONY := _all
1da177e4
LT
156_all:
157
1cacc9ab
SR
158# Cancel implicit rules on top Makefile
159$(CURDIR)/Makefile Makefile: ;
160
1da177e4
LT
161ifneq ($(KBUILD_OUTPUT),)
162# Invoke a second make in the output directory, passing relevant variables
163# check that the output directory actually exists
164saved-output := $(KBUILD_OUTPUT)
1c9e70a5
MY
165KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
166 && /bin/pwd)
1da177e4 167$(if $(KBUILD_OUTPUT),, \
1c9e70a5 168 $(error failed to create output directory "$(saved-output)"))
1da177e4 169
0b35786d
MM
170PHONY += $(MAKECMDGOALS) sub-make
171
1cacc9ab 172$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
16f89098 173 @:
0b35786d 174
c2e28dc9
MM
175# Fake the "Entering directory" message once, so that IDEs/editors are
176# able to understand relative filenames.
066b7ed9
MM
177 echodir := @echo
178 quiet_echodir := @echo
179silent_echodir := @:
0b35786d 180sub-make: FORCE
066b7ed9 181 $($(quiet)echodir) "make[1]: Entering directory \`$(KBUILD_OUTPUT)'"
23a45e2c
SR
182 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
183 KBUILD_SRC=$(CURDIR) \
0b35786d
MM
184 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
185 $(filter-out _all sub-make,$(MAKECMDGOALS))
1da177e4
LT
186
187# Leave processing to above invocation of make
188skip-makefile := 1
189endif # ifneq ($(KBUILD_OUTPUT),)
190endif # ifeq ($(KBUILD_SRC),)
191
192# We process the rest of the Makefile if this is the final invocation of make
193ifeq ($(skip-makefile),)
194
195# If building an external module we do not care about the all: rule
196# but instead _all depend on modules
4f193362 197PHONY += all
1da177e4
LT
198ifeq ($(KBUILD_EXTMOD),)
199_all: all
200else
201_all: modules
202endif
203
9da0763b
MM
204ifeq ($(KBUILD_SRC),)
205 # building in the source tree
206 srctree := .
207else
208 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
209 # building in a subdirectory of the source tree
210 srctree := ..
211 else
212 srctree := $(KBUILD_SRC)
213 endif
214endif
7e1c0477 215objtree := .
1da177e4
LT
216src := $(srctree)
217obj := $(objtree)
218
0f558c33 219VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1da177e4 220
11294235 221export srctree objtree VPATH
1da177e4 222
1da177e4
LT
223
224# SUBARCH tells the usermode build what the underlying arch is. That is set
225# first, and if a usermode build is happening, the "ARCH=um" on the command
226# line overrides the setting of ARCH below. If a native build is happening,
38385f8f 227# then ARCH is assigned, getting whatever value it gets normally, and
1da177e4
LT
228# SUBARCH is subsequently ignored.
229
ffee0de4
DW
230SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
231 -e s/sun4u/sparc64/ \
1da177e4 232 -e s/arm.*/arm/ -e s/sa110/arm/ \
39990b5e 233 -e s/s390x/s390/ -e s/parisc64/parisc/ \
236b1957 234 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
f1b99392 235 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
1da177e4
LT
236
237# Cross compiling and selecting different set of gcc/bin-utils
238# ---------------------------------------------------------------------------
239#
240# When performing cross compilation for other architectures ARCH shall be set
241# to the target architecture. (See arch/* for the possibilities).
242# ARCH can be set during invocation of make:
243# make ARCH=ia64
244# Another way is to have ARCH set in the environment.
245# The default ARCH is the host where make is executed.
246
247# CROSS_COMPILE specify the prefix used for all executables used
248# during compilation. Only gcc and related bin-utils executables
249# are prefixed with $(CROSS_COMPILE).
250# CROSS_COMPILE can be set on the command line
251# make CROSS_COMPILE=ia64-linux-
252# Alternatively CROSS_COMPILE can be set in the environment.
84336466
RM
253# A third alternative is to store a setting in .config so that plain
254# "make" in the configured kernel build directory always uses that.
1da177e4
LT
255# Default value for CROSS_COMPILE is not to prefix executables
256# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
2331d1a6 257ARCH ?= $(SUBARCH)
84336466 258CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
1da177e4
LT
259
260# Architecture as present in compile.h
6752ed90
TG
261UTS_MACHINE := $(ARCH)
262SRCARCH := $(ARCH)
1da177e4 263
d746d647
SR
264# Additional ARCH settings for x86
265ifeq ($(ARCH),i386)
266 SRCARCH := x86
267endif
268ifeq ($(ARCH),x86_64)
269 SRCARCH := x86
270endif
74b469f2 271
5e538790 272# Additional ARCH settings for sparc
e69f58c0
NK
273ifeq ($(ARCH),sparc32)
274 SRCARCH := sparc
275endif
a439fe51 276ifeq ($(ARCH),sparc64)
5e538790 277 SRCARCH := sparc
a439fe51 278endif
2fb9b1bd 279
3cc000b5
PM
280# Additional ARCH settings for sh
281ifeq ($(ARCH),sh64)
282 SRCARCH := sh
283endif
284
18aecc2b 285# Additional ARCH settings for tile
6738d321
CM
286ifeq ($(ARCH),tilepro)
287 SRCARCH := tile
288endif
18aecc2b
CM
289ifeq ($(ARCH),tilegx)
290 SRCARCH := tile
291endif
292
5e538790
SR
293# Where to locate arch specific headers
294hdr-arch := $(SRCARCH)
295
14cdd3c4 296KCONFIG_CONFIG ?= .config
41263fc6 297export KCONFIG_CONFIG
14cdd3c4 298
1da177e4
LT
299# SHELL used by kbuild
300CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
301 else if [ -x /bin/bash ]; then echo /bin/bash; \
302 else echo sh; fi ; fi)
303
070b98bf
SR
304HOSTCC = gcc
305HOSTCXX = g++
25583d4b 306HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
070b98bf 307HOSTCXXFLAGS = -O2
1da177e4 308
61163efa
BW
309ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
310HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
311 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
312endif
313
070b98bf
SR
314# Decide whether to build built-in, modular, or both.
315# Normally, just do built-in.
1da177e4
LT
316
317KBUILD_MODULES :=
318KBUILD_BUILTIN := 1
319
3fbb43df
MY
320# If we have only "make modules", don't compile built-in objects.
321# When we're building modules with modversions, we need to consider
322# the built-in objects during the descend as well, in order to
323# make sure the checksums are up to date before we record them.
1da177e4
LT
324
325ifeq ($(MAKECMDGOALS),modules)
326 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
327endif
328
3fbb43df
MY
329# If we have "make <whatever> modules", compile modules
330# in addition to whatever we do anyway.
331# Just "make" or "make all" shall build modules as well
1da177e4
LT
332
333ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
334 KBUILD_MODULES := 1
335endif
336
337ifeq ($(MAKECMDGOALS),)
338 KBUILD_MODULES := 1
339endif
340
e579d351 341export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
342export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
343
61163efa
BW
344ifneq ($(CC),)
345ifeq ($(shell $(CC) -v 2>&1 | grep -c "clang version"), 1)
346COMPILER := clang
347else
348COMPILER := gcc
349endif
350export COMPILER
351endif
1da177e4
LT
352
353# Look for make include files relative to root of kernel src
354MAKEFLAGS += --include-dir=$(srctree)
355
1cacc9ab
SR
356# We need some generic definitions (do not try to remake the file).
357$(srctree)/scripts/Kbuild.include: ;
15964864 358include $(srctree)/scripts/Kbuild.include
1da177e4
LT
359
360# Make variables (CC, etc...)
1da177e4
LT
361AS = $(CROSS_COMPILE)as
362LD = $(CROSS_COMPILE)ld
363CC = $(CROSS_COMPILE)gcc
364CPP = $(CC) -E
365AR = $(CROSS_COMPILE)ar
366NM = $(CROSS_COMPILE)nm
367STRIP = $(CROSS_COMPILE)strip
368OBJCOPY = $(CROSS_COMPILE)objcopy
369OBJDUMP = $(CROSS_COMPILE)objdump
370AWK = awk
371GENKSYMS = scripts/genksyms/genksyms
caa27b66 372INSTALLKERNEL := installkernel
1da177e4 373DEPMOD = /sbin/depmod
1da177e4 374PERL = perl
011bf125 375PYTHON = python
1da177e4
LT
376CHECK = sparse
377
80a7d1d9
HE
378CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
379 -Wbitwise -Wno-return-void $(CF)
6588169d
SR
380CFLAGS_MODULE =
381AFLAGS_MODULE =
382LDFLAGS_MODULE =
1da177e4
LT
383CFLAGS_KERNEL =
384AFLAGS_KERNEL =
2521f2c2 385CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
1da177e4
LT
386
387
abbf1590
DH
388# Use USERINCLUDE when you must reference the UAPI directories only.
389USERINCLUDE := \
390 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
391 -Iarch/$(hdr-arch)/include/generated/uapi \
392 -I$(srctree)/include/uapi \
393 -Iinclude/generated/uapi \
394 -include $(srctree)/include/linux/kconfig.h
395
1da177e4
LT
396# Use LINUXINCLUDE when you must reference the include/ directory.
397# Needed to be compatible with the O= option
abbf1590
DH
398LINUXINCLUDE := \
399 -I$(srctree)/arch/$(hdr-arch)/include \
400 -Iarch/$(hdr-arch)/include/generated \
401 $(if $(KBUILD_SRC), -I$(srctree)/include) \
402 -Iinclude \
403 $(USERINCLUDE)
1da177e4 404
d8672b40 405KBUILD_CPPFLAGS := -D__KERNEL__
1da177e4 406
a0f97e06 407KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
94bed2a9 408 -fno-strict-aliasing -fno-common \
a8735821 409 -Werror-implicit-function-declaration \
a1c48bb1
GU
410 -Wno-format-security
411
80c00ba9
SR
412KBUILD_AFLAGS_KERNEL :=
413KBUILD_CFLAGS_KERNEL :=
222d394d 414KBUILD_AFLAGS := -D__ASSEMBLY__
6588169d
SR
415KBUILD_AFLAGS_MODULE := -DMODULE
416KBUILD_CFLAGS_MODULE := -DMODULE
417KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
1da177e4 418
f1d28fb0
RZ
419# Read KERNELRELEASE from include/config/kernel.release (if it exists)
420KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
cacd54ef 421KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
cb58455c 422
070b98bf 423export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 424export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
caa27b66 425export CPP AR NM STRIP OBJCOPY OBJDUMP
011bf125 426export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
070b98bf 427export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 428
06c5040c 429export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
2521f2c2 430export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
222d394d 431export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
6588169d 432export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
80c00ba9 433export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
40df759e 434export KBUILD_ARFLAGS
1da177e4
LT
435
436# When compiling out-of-tree modules, put MODVERDIR in the module
437# tree rather than in the kernel tree. The kernel tree might
438# even be read-only.
439export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
440
1da177e4
LT
441# Files to ignore in find ... statements
442
ae63b2d7
PB
443export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
444 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
445 -prune -o
450c6076
JJ
446export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
447 --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
448
449# ===========================================================================
450# Rules shared between *config targets and build targets
451
452# Basic helpers built in scripts/
4f193362 453PHONY += scripts_basic
1da177e4
LT
454scripts_basic:
455 $(Q)$(MAKE) $(build)=scripts/basic
638adb05 456 $(Q)rm -f .tmp_quiet_recordmcount
1da177e4 457
cd05e6bd
JB
458# To avoid any implicit rule to kick in, define an empty command.
459scripts/basic/%: scripts_basic ;
460
4f193362 461PHONY += outputmakefile
fd5f0cd6
JB
462# outputmakefile generates a Makefile in the output directory, if using a
463# separate output directory. This allows convenient use of make in the
464# output directory.
1da177e4 465outputmakefile:
fd5f0cd6 466ifneq ($(KBUILD_SRC),)
92979997 467 $(Q)ln -fsn $(srctree) source
fd5f0cd6
JB
468 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
469 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
470endif
1da177e4 471
d8ecc5cd
SR
472# Support for using generic headers in asm-generic
473PHONY += asm-generic
474asm-generic:
475 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
3c5994c8
CM
476 src=asm obj=arch/$(SRCARCH)/include/generated/asm
477 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
478 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
d8ecc5cd 479
1da177e4
LT
480# To make sure we do not include .config for any of the *config targets
481# catch them early, and hand them over to scripts/kconfig/Makefile
482# It is allowed to specify more targets when calling make, including
483# mixing *config targets and build targets.
070b98bf 484# For example 'make oldconfig all'.
1da177e4
LT
485# Detect when mixed targets is specified, and make a second invocation
486# of make so .config is not included in this case either (for *config).
487
10b63956 488version_h := include/generated/uapi/linux/version.h
d183e6f5 489
3eb3c740 490no-dot-config-targets := clean mrproper distclean \
f4ed1009 491 cscope gtags TAGS tags help %docs check% coccicheck \
d183e6f5 492 $(version_h) headers_% archheaders archscripts \
4aed2fd8 493 kernelversion %src-pkg
1da177e4
LT
494
495config-targets := 0
496mixed-targets := 0
497dot-config := 1
498
499ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
500 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
501 dot-config := 0
502 endif
503endif
504
505ifeq ($(KBUILD_EXTMOD),)
506 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
507 config-targets := 1
508 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
509 mixed-targets := 1
510 endif
511 endif
512endif
513
514ifeq ($(mixed-targets),1)
515# ===========================================================================
516# We're called with mixed targets (*config and build targets).
517# Handle them one by one.
518
9319f453
MY
519PHONY += $(MAKECMDGOALS) __build_one_by_one
520
521$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
522 @:
523
524__build_one_by_one:
525 $(Q)set -e; \
526 for i in $(MAKECMDGOALS); do \
527 $(MAKE) -f $(srctree)/Makefile $$i; \
528 done
1da177e4
LT
529
530else
531ifeq ($(config-targets),1)
532# ===========================================================================
533# *config targets only - make sure prerequisites are updated, and descend
534# in scripts/kconfig to make the *config target
535
536# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
537# KBUILD_DEFCONFIG may point out an alternative default configuration
538# used for 'make defconfig'
74b469f2 539include $(srctree)/arch/$(SRCARCH)/Makefile
61bee204 540export KBUILD_DEFCONFIG KBUILD_KCONFIG
1da177e4 541
31110ebb 542config: scripts_basic outputmakefile FORCE
31110ebb
SR
543 $(Q)$(MAKE) $(build)=scripts/kconfig $@
544
545%config: scripts_basic outputmakefile FORCE
1da177e4
LT
546 $(Q)$(MAKE) $(build)=scripts/kconfig $@
547
548else
549# ===========================================================================
550# Build targets only - this includes vmlinux, arch specific targets, clean
551# targets and others. In general all targets except *config targets.
552
553ifeq ($(KBUILD_EXTMOD),)
554# Additional helpers built in scripts/
555# Carefully list dependencies so we do not try to build scripts twice
070b98bf 556# in parallel
4f193362 557PHONY += scripts
a54292f5
AS
558scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
559 asm-generic
1da177e4
LT
560 $(Q)$(MAKE) $(build)=$(@)
561
1da177e4
LT
562# Objects we will link into vmlinux / subdirs we need to visit
563init-y := init/
4d2acfbf 564drivers-y := drivers/ sound/ firmware/
1da177e4
LT
565net-y := net/
566libs-y := lib/
567core-y := usr/
568endif # KBUILD_EXTMOD
569
570ifeq ($(dot-config),1)
9ee4e336
SR
571# Read in config
572-include include/config/auto.conf
1da177e4 573
9ee4e336 574ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
575# Read in dependencies to all Kconfig* files, make sure to run
576# oldconfig if changes are detected.
c955ccaf 577-include include/config/auto.conf.cmd
1da177e4 578
1da177e4 579# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 580$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 581
c955ccaf 582# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 583# with it and forgot to run make oldconfig.
070b98bf 584# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 585# we execute the config step to be sure to catch updated Kconfig files
bc081dd6 586include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 587 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 588else
264a2683 589# external modules needs include/generated/autoconf.h and include/config/auto.conf
9ee4e336
SR
590# but do not care if they are up-to-date. Use auto.conf to trigger the test
591PHONY += include/config/auto.conf
592
593include/config/auto.conf:
264a2683 594 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
5369f550
MM
595 echo >&2; \
596 echo >&2 " ERROR: Kernel configuration is invalid."; \
597 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
598 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
599 echo >&2 ; \
9ee4e336
SR
600 /bin/false)
601
602endif # KBUILD_EXTMOD
c955ccaf 603
1da177e4
LT
604else
605# Dummy target needed, because used as prerequisite
c955ccaf 606include/config/auto.conf: ;
9ee4e336 607endif # $(dot-config)
1da177e4
LT
608
609# The all: target is the default when no target is given on the
610# command line.
611# This allow a user to issue only 'make' to build a kernel including modules
c8447161 612# Defaults to vmlinux, but the arch makefile usually adds further targets
1da177e4
LT
613all: vmlinux
614
a1c48bb1
GU
615include $(srctree)/arch/$(SRCARCH)/Makefile
616
617KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
618
1da177e4 619ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
e74fc973 620KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
1da177e4 621else
a0f97e06 622KBUILD_CFLAGS += -O2
1da177e4
LT
623endif
624
69102311
JK
625# Tell gcc to never replace conditional load with a non-conditional one
626KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
627
1873e870
AK
628ifdef CONFIG_READABLE_ASM
629# Disable optimizations that make assembler listings hard to read.
630# reorder blocks reorders the control in the function
631# ipa clone creates specialized cloned functions
632# partial inlining inlines only parts of functions
633KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
634 $(call cc-option,-fno-ipa-cp-clone,) \
635 $(call cc-option,-fno-partial-inlining)
636endif
637
08f67461 638ifneq ($(CONFIG_FRAME_WARN),0)
35bb5b1e
AK
639KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
640endif
641
19952a92 642# Handle stack protector mode.
1332429b
KC
643#
644# Since kbuild can potentially perform two passes (first with the old
645# .config values and then with updated .config values), we cannot error out
646# if a desired compiler option is unsupported. If we were to error, kbuild
647# could never get to the second pass and actually notice that we changed
648# the option to something that was supported.
649#
650# Additionally, we don't want to fallback and/or silently change which compiler
651# flags will be used, since that leads to producing kernels with different
652# security feature characteristics depending on the compiler used. ("But I
653# selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
654#
655# The middle ground is to warn here so that the failed option is obvious, but
656# to let the build fail with bad compiler flags so that we can't produce a
657# kernel when there is a CONFIG and compiler mismatch.
658#
8779657d 659ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
19952a92
KC
660 stackp-flag := -fstack-protector
661 ifeq ($(call cc-option, $(stackp-flag)),)
6c15b327 662 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
27b2a49a 663 -fstack-protector not supported by compiler)
19952a92 664 endif
6c15b327
JB
665else
666ifdef CONFIG_CC_STACKPROTECTOR_STRONG
8779657d
KC
667 stackp-flag := -fstack-protector-strong
668 ifeq ($(call cc-option, $(stackp-flag)),)
669 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
670 -fstack-protector-strong not supported by compiler)
671 endif
19952a92
KC
672else
673 # Force off for distro compilers that enable stack protector by default.
674 stackp-flag := $(call cc-option, -fno-stack-protector)
5d707e9c 675endif
6c15b327 676endif
19952a92 677KBUILD_CFLAGS += $(stackp-flag)
e06b8b98 678
61163efa
BW
679ifeq ($(COMPILER),clang)
680KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
681KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
682KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
683KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
684KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
685# Quiet clang warning: comparison of unsigned expression < 0 is always false
686KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
687# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
688# source of a reference will be _MergedGlobals and not on of the whitelisted names.
689# See modpost pattern 2
690KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
26ea6bb1 691KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
61163efa
BW
692else
693
af0e5d56
DJ
694# This warning generated too much noise in a regular build.
695# Use make W=1 to enable this warning (see scripts/Makefile.build)
8417da6f 696KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
61163efa 697endif
af0e5d56 698
1da177e4 699ifdef CONFIG_FRAME_POINTER
a0f97e06 700KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 701else
7e9501fd
RV
702# Some targets (ARM with Thumb2, for example), can't be built with frame
703# pointers. For those, we don't have FUNCTION_TRACER automatically
704# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
705# incompatible with -fomit-frame-pointer with current GCC, so we don't use
706# -fomit-frame-pointer with FUNCTION_TRACER.
707ifndef CONFIG_FUNCTION_TRACER
a0f97e06 708KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4 709endif
7e9501fd 710endif
1da177e4 711
2062afb4
LT
712KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
713
1da177e4 714ifdef CONFIG_DEBUG_INFO
866ced95
AK
715ifdef CONFIG_DEBUG_INFO_SPLIT
716KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
717else
a0f97e06 718KBUILD_CFLAGS += -g
866ced95 719endif
2288328c 720KBUILD_AFLAGS += -Wa,-gdwarf-2
1da177e4 721endif
bfaf2dd3
AK
722ifdef CONFIG_DEBUG_INFO_DWARF4
723KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
724endif
1da177e4 725
d6f4ceb7 726ifdef CONFIG_DEBUG_INFO_REDUCED
e82c4bb8
AK
727KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
728 $(call cc-option,-fno-var-tracking)
d6f4ceb7
AK
729endif
730
606576ce 731ifdef CONFIG_FUNCTION_TRACER
a2546fae
SR
732ifdef CONFIG_HAVE_FENTRY
733CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
734endif
735KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
736KBUILD_AFLAGS += $(CC_USING_FENTRY)
72441cb1 737ifdef CONFIG_DYNAMIC_FTRACE
cf4db259 738 ifdef CONFIG_HAVE_C_RECORDMCOUNT
72441cb1
SR
739 BUILD_C_RECORDMCOUNT := y
740 export BUILD_C_RECORDMCOUNT
741 endif
742endif
16444a8a
ACM
743endif
744
91341d4b
SR
745# We trigger additional mismatches with less inlining
746ifdef CONFIG_DEBUG_SECTION_MISMATCH
747KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
748endif
749
e8e69931 750# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 751NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
752CHECKFLAGS += $(NOSTDINC_FLAGS)
753
1da177e4 754# warn about C99 declaration after statement
a0f97e06 755KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 756
070b98bf 757# disable pointer signed / unsigned warnings in gcc 4.0
8417da6f 758KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
1da177e4 759
fe8d0a41 760# disable invalid "can't wrap" optimizations for signed / pointers
a137802e 761KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
d0115552 762
8f7f5c9f
AK
763# conserve stack if available
764KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
765
80970472
ST
766# disallow errors like 'EXPORT_GPL(foo);' with missing header
767KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
768
769# require functions to have arguments in prototypes, not empty 'int foo()'
770KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
771
fe7c36c7
JT
772# Prohibit date/time macros, which would make the build non-deterministic
773KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
774
40df759e
MM
775# use the deterministic mode of AR if available
776KBUILD_ARFLAGS := $(call ar-option,D)
777
bf5438fc
JB
778# check for 'asm goto'
779ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
780 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
781endif
782
a86fe353
MY
783include $(srctree)/scripts/Makefile.extrawarn
784
06c5040c 785# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
70cfe026
786KBUILD_CPPFLAGS += $(KCPPFLAGS)
787KBUILD_AFLAGS += $(KAFLAGS)
788KBUILD_CFLAGS += $(KCFLAGS)
52bcc330 789
18991197
RM
790# Use --build-id when available.
791LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
f86fd306 792 $(call cc-ldoption, -Wl$(comma)--build-id,))
6588169d 793KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
18991197
RM
794LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
795
5d7d18f5 796ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
d79a2719 797LDFLAGS_vmlinux += $(call ld-option, -X,)
5d7d18f5
DH
798endif
799
1da177e4 800# Default kernel image to build when no specific target is given.
070b98bf 801# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
802# set in the environment
803# Also any assignments in arch/$(ARCH)/Makefile take precedence over
804# this default value
805export KBUILD_IMAGE ?= vmlinux
806
807#
808# INSTALL_PATH specifies where to place the updated kernel and system map
809# images. Default is /boot, but you can set it to other values
810export INSTALL_PATH ?= /boot
811
f4d4ffc0
JC
812#
813# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
814# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
815# an argument if needed. Otherwise it defaults to the kernel install path
816#
817export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
818
1da177e4
LT
819#
820# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
821# relocations required by build roots. This is not defined in the
070b98bf 822# makefile but the argument can be passed to make if needed.
1da177e4
LT
823#
824
df9df036 825MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
826export MODLIB
827
ac031f26 828#
3fbb43df
MY
829# INSTALL_MOD_STRIP, if defined, will cause modules to be
830# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
831# the default option --strip-debug will be used. Otherwise,
832# INSTALL_MOD_STRIP value will be used as the options to the strip command.
2ea03891 833
ac031f26
TT
834ifdef INSTALL_MOD_STRIP
835ifeq ($(INSTALL_MOD_STRIP),1)
2ea03891 836mod_strip_cmd = $(STRIP) --strip-debug
ac031f26 837else
2ea03891 838mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
ac031f26
TT
839endif # INSTALL_MOD_STRIP=1
840else
2ea03891 841mod_strip_cmd = true
ac031f26
TT
842endif # INSTALL_MOD_STRIP
843export mod_strip_cmd
844
beb50df3
BJ
845# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
846# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
847# or CONFIG_MODULE_COMPRESS_XZ.
848
849mod_compress_cmd = true
850ifdef CONFIG_MODULE_COMPRESS
851 ifdef CONFIG_MODULE_COMPRESS_GZIP
852 mod_compress_cmd = gzip -n
853 endif # CONFIG_MODULE_COMPRESS_GZIP
854 ifdef CONFIG_MODULE_COMPRESS_XZ
855 mod_compress_cmd = xz
856 endif # CONFIG_MODULE_COMPRESS_XZ
857endif # CONFIG_MODULE_COMPRESS
858export mod_compress_cmd
859
1bf49dd4 860# Select initial ramdisk compression format, default is gzip(1).
861# This shall be used by the dracut(8) tool while creating an initramfs image.
862#
7ac18156
JB
863INITRD_COMPRESS-y := gzip
864INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
865INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
866INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
867INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
868INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
b7000ade
LT
869# do not export INITRD_COMPRESS, since we didn't actually
870# choose a sane default compression above.
871# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1da177e4 872
d9d8d7ed 873ifdef CONFIG_MODULE_SIG_ALL
e2a666d5
RR
874MODSECKEY = ./signing_key.priv
875MODPUBKEY = ./signing_key.x509
876export MODPUBKEY
4bc9410c 877mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
e2a666d5
RR
878else
879mod_sign_cmd = true
880endif
881export mod_sign_cmd
882
883
1da177e4 884ifeq ($(KBUILD_EXTMOD),)
3a65dfe8 885core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
886
887vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
888 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
889 $(net-y) $(net-m) $(libs-y) $(libs-m)))
890
891vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
892 $(init-n) $(init-) \
893 $(core-n) $(core-) $(drivers-n) $(drivers-) \
894 $(net-n) $(net-) $(libs-n) $(libs-))))
895
896init-y := $(patsubst %/, %/built-in.o, $(init-y))
897core-y := $(patsubst %/, %/built-in.o, $(core-y))
898drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
899net-y := $(patsubst %/, %/built-in.o, $(net-y))
900libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
901libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
902libs-y := $(libs-y1) $(libs-y2)
903
1f2bfbd0 904# Externally visible symbols (used by link-vmlinux.sh)
95698570
SR
905export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
906export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
907export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1f2bfbd0 908export LDFLAGS_vmlinux
6615d6c3
MM
909# used by scripts/pacmage/Makefile
910export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
9bb48247 911
1f2bfbd0 912vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
1da177e4 913
1f2bfbd0
SR
914# Final link of vmlinux
915 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
916quiet_cmd_link-vmlinux = LINK $@
1da177e4 917
1f2bfbd0
SR
918# Include targets which we want to
919# execute if the rest of the kernel build went well.
920vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
0f836e5f 921ifdef CONFIG_HEADERS_CHECK
0e7af8d0 922 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025
MD
923endif
924ifdef CONFIG_SAMPLES
925 $(Q)$(MAKE) $(build)=samples
3794f3e8
RD
926endif
927ifdef CONFIG_BUILD_DOCSRC
928 $(Q)$(MAKE) $(build)=Documentation
0f836e5f 929endif
1f2bfbd0 930 +$(call if_changed,link-vmlinux)
741f98fe 931
38385f8f 932# The actual objects are generated when descending,
1da177e4 933# make sure no implicit rule kicks in
1f2bfbd0 934$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1da177e4
LT
935
936# Handle descending into subdirectories listed in $(vmlinux-dirs)
937# Preset locale variables to speed up the build process. Limit locale
938# tweaks to this spot to avoid wrong language settings when running
939# make menuconfig etc.
940# Error messages still appears in the original language
941
4f193362 942PHONY += $(vmlinux-dirs)
5bb78269 943$(vmlinux-dirs): prepare scripts
1da177e4
LT
944 $(Q)$(MAKE) $(build)=$@
945
0d0e7718
MM
946define filechk_kernel.release
947 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
948endef
949
83a35e36 950# Store (new) KERNELRELEASE string in include/config/kernel.release
f1d28fb0 951include/config/kernel.release: include/config/auto.conf FORCE
0d0e7718 952 $(call filechk,kernel.release)
cb58455c
SR
953
954
1da177e4 955# Things we need to do before we recursively start building the kernel
5bb78269
SR
956# or the modules are listed in "prepare".
957# A multi level approach is used. prepareN is processed before prepareN-1.
958# archprepare is used in arch Makefiles and when processed asm symlink,
959# version.h and scripts_basic is processed / created.
1da177e4 960
5bb78269 961# Listed in dependency order
4f193362 962PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 963
86feeaa8 964# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
965# and if so do:
966# 1) Check that make has not been executed in the kernel src $(srctree)
f1d28fb0 967prepare3: include/config/kernel.release
1da177e4 968ifneq ($(KBUILD_SRC),)
fd54f502 969 @$(kecho) ' Using $(srctree) as source for kernel'
c955ccaf 970 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
5369f550
MM
971 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
972 echo >&2 " in the '$(srctree)' directory.";\
1da177e4
LT
973 /bin/false; \
974 fi;
1da177e4
LT
975endif
976
86feeaa8 977# prepare2 creates a makefile if using a separate output directory
d8ecc5cd 978prepare2: prepare3 outputmakefile asm-generic
1da177e4 979
d183e6f5 980prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
f7f16b77 981 include/config/auto.conf
7bb9d092 982 $(cmd_crmodverdir)
1da177e4 983
6520fe55 984archprepare: archheaders archscripts prepare1 scripts_basic
5bb78269
SR
985
986prepare0: archprepare FORCE
8d36a623 987 $(Q)$(MAKE) $(build)=.
86feeaa8 988
1da177e4 989# All the preparing..
d395efb5 990prepare: prepare0
1da177e4 991
1da177e4
LT
992# Generate some files
993# ---------------------------------------------------------------------------
994
995# KERNELRELEASE can change from a few different places, meaning version.h
996# needs to be updated, so this check is forced on all builds
997
998uts_len := 64
63104eec
SR
999define filechk_utsrelease.h
1000 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1001 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1002 exit 1; \
1003 fi; \
1004 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1005endef
1da177e4
LT
1006
1007define filechk_version.h
450c6076
JJ
1008 (echo \#define LINUX_VERSION_CODE $(shell \
1009 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
63104eec 1010 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
1011endef
1012
d183e6f5 1013$(version_h): $(srctree)/Makefile FORCE
1da177e4
LT
1014 $(call filechk,version.h)
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
1da177e4
LT
1024# ---------------------------------------------------------------------------
1025
4f193362 1026PHONY += depend dep
1da177e4
LT
1027depend dep:
1028 @echo '*** Warning: make $@ is unnecessary now.'
1029
88ecf814
DW
1030# ---------------------------------------------------------------------------
1031# Firmware install
1032INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1033export INSTALL_FW_PATH
1034
1035PHONY += firmware_install
1036firmware_install: FORCE
1037 @mkdir -p $(objtree)/firmware
1038 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1039
8d730cfb
DW
1040# ---------------------------------------------------------------------------
1041# Kernel headers
8d730cfb 1042
e6883b18
SR
1043#Default location for installed headers
1044export INSTALL_HDR_PATH = $(objtree)/usr
6d716275 1045
e6883b18 1046hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
2fb9b1bd
SR
1047
1048# If we do an all arch process set dst to asm-$(hdr-arch)
1049hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
e6883b18 1050
052ad274
PA
1051PHONY += archheaders
1052archheaders:
1053
6520fe55
PA
1054PHONY += archscripts
1055archscripts:
1056
e6883b18 1057PHONY += __headers
d183e6f5 1058__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
e1b702cf 1059 $(Q)$(MAKE) $(build)=scripts build_unifdef
e6883b18
SR
1060
1061PHONY += headers_install_all
2fb9b1bd
SR
1062headers_install_all:
1063 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
6d716275 1064
8d730cfb 1065PHONY += headers_install
e6883b18 1066headers_install: __headers
10b63956
DH
1067 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1068 $(error Headers not exportable for the $(SRCARCH) architecture))
1069 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1070 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
8d730cfb 1071
1f85712e
MF
1072PHONY += headers_check_all
1073headers_check_all: headers_install_all
2fb9b1bd 1074 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1f85712e 1075
68475359
DW
1076PHONY += headers_check
1077headers_check: headers_install
10b63956
DH
1078 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1079 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
68475359 1080
5a5da78b
SK
1081# ---------------------------------------------------------------------------
1082# Kernel selftest
1083
1084PHONY += kselftest
1085kselftest:
1086 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1087
1da177e4
LT
1088# ---------------------------------------------------------------------------
1089# Modules
1090
1091ifdef CONFIG_MODULES
1092
070b98bf 1093# By default, build modules as well
1da177e4 1094
73d1393e 1095all: modules
1da177e4 1096
3fbb43df 1097# Build modules
551559e1 1098#
3fbb43df
MY
1099# A module can be listed more than once in obj-m resulting in
1100# duplicate lines in modules.order files. Those are removed
1101# using awk while concatenating to the final file.
1da177e4 1102
4f193362 1103PHONY += modules
2da30e70 1104modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
551559e1 1105 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
fd54f502 1106 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1107 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
44463f7d 1108 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1da177e4 1109
a6c36632
MM
1110modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1111 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1112
73d1393e 1113%/modules.builtin: include/config/auto.conf
a6c36632
MM
1114 $(Q)$(MAKE) $(modbuiltin)=$*
1115
1da177e4
LT
1116
1117# Target to prepare building external modules
4f193362 1118PHONY += modules_prepare
5bb78269 1119modules_prepare: prepare scripts
1da177e4
LT
1120
1121# Target to install modules
4f193362 1122PHONY += modules_install
1da177e4
LT
1123modules_install: _modinst_ _modinst_post
1124
4f193362 1125PHONY += _modinst_
2da30e70 1126_modinst_:
1da177e4
LT
1127 @rm -rf $(MODLIB)/kernel
1128 @rm -f $(MODLIB)/source
1129 @mkdir -p $(MODLIB)/kernel
890676c6 1130 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1da177e4
LT
1131 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1132 rm -f $(MODLIB)/build ; \
7e1c0477 1133 ln -s $(CURDIR) $(MODLIB)/build ; \
1da177e4 1134 fi
551559e1 1135 @cp -f $(objtree)/modules.order $(MODLIB)/
bc081dd6 1136 @cp -f $(objtree)/modules.builtin $(MODLIB)/
b805aa0e 1137 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1138
50a8ec31 1139# This depmod is only for convenience to give the initial
1da177e4
LT
1140# boot a modules.dep even before / is mounted read-write. However the
1141# boot script depmod is the master version.
4f193362 1142PHONY += _modinst_post
6d128e1e 1143_modinst_post: _modinst_
88ecf814 1144 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
50a8ec31 1145 $(call cmd,depmod)
1da177e4 1146
d890f510
JB
1147ifeq ($(CONFIG_MODULE_SIG), y)
1148PHONY += modules_sign
1149modules_sign:
1150 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1151endif
1152
1da177e4
LT
1153else # CONFIG_MODULES
1154
1155# Modules not configured
1156# ---------------------------------------------------------------------------
1157
1158modules modules_install: FORCE
5369f550
MM
1159 @echo >&2
1160 @echo >&2 "The present kernel configuration has modules disabled."
1161 @echo >&2 "Type 'make config' and enable loadable module support."
1162 @echo >&2 "Then build a kernel with module support enabled."
1163 @echo >&2
1da177e4
LT
1164 @exit 1
1165
1166endif # CONFIG_MODULES
1167
1da177e4
LT
1168###
1169# Cleaning is done on three levels.
1170# make clean Delete most generated files
1171# Leave enough to build external modules
1172# make mrproper Delete the current configuration, and all generated files
1173# make distclean Remove editor backup files, patch leftover files and the like
1174
1175# Directories & files removed with 'make clean'
1176CLEAN_DIRS += $(MODVERDIR)
1da177e4
LT
1177
1178# Directories & files removed with 'make mrproper'
d8ecc5cd 1179MRPROPER_DIRS += include/config usr/include include/generated \
3fbb43df 1180 arch/*/include/generated .tmp_objdiff
d183e6f5 1181MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
d5b71936
RR
1182 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1183 signing_key.priv signing_key.x509 x509.genkey \
1184 extra_certificates signing_key.x509.keyid \
9c8cdb71 1185 signing_key.x509.signer include/linux/version.h
1da177e4
LT
1186
1187# clean - Delete most, but leave enough to build external modules
1188#
1189clean: rm-dirs := $(CLEAN_DIRS)
1190clean: rm-files := $(CLEAN_FILES)
fb68d4be 1191clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1da177e4 1192
bd1ee804 1193PHONY += $(clean-dirs) clean archclean vmlinuxclean
1da177e4
LT
1194$(clean-dirs):
1195 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1196
bd1ee804
PM
1197vmlinuxclean:
1198 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1199
1200clean: archclean vmlinuxclean
1da177e4
LT
1201
1202# mrproper - Delete all generated files, including .config
1203#
1204mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1205mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1206mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1207
4f193362 1208PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1209$(mrproper-dirs):
1210 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1211
1212mrproper: clean archmrproper $(mrproper-dirs)
1213 $(call cmd,rmdirs)
1214 $(call cmd,rmfiles)
1215
1216# distclean
1217#
4f193362 1218PHONY += distclean
1da177e4
LT
1219
1220distclean: mrproper
1221 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1222 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1223 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
a03fcb50 1224 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
1da177e4
LT
1225 -type f -print | xargs rm -f
1226
1227
1228# Packaging of the kernel to various formats
1229# ---------------------------------------------------------------------------
1230# rpm target kept for backward compatibility
c79624c1 1231package-dir := scripts/package
1da177e4 1232
bafb6747
ACM
1233%src-pkg: FORCE
1234 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1235%pkg: include/config/kernel.release FORCE
6c2133e1 1236 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1237rpm: include/config/kernel.release FORCE
6c2133e1 1238 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1239
1240
1241# Brief documentation of the typical targets used
1242# ---------------------------------------------------------------------------
1243
5dffbe81 1244boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1da177e4 1245boards := $(notdir $(boards))
5dffbe81
SB
1246board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1247board-dirs := $(sort $(notdir $(board-dirs:/=)))
1da177e4
LT
1248
1249help:
1250 @echo 'Cleaning targets:'
5ea084ef 1251 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1252 @echo ' enough build support to build external modules'
5ea084ef 1253 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1254 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1255 @echo ''
1256 @echo 'Configuration targets:'
1257 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1258 @echo ''
1259 @echo 'Other generic targets:'
1260 @echo ' all - Build all targets marked with [*]'
1261 @echo '* vmlinux - Build the bare kernel'
1262 @echo '* modules - Build all modules'
9cc5d74c 1263 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
88ecf814
DW
1264 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1265 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1da177e4 1266 @echo ' dir/ - Build all files in dir and below'
62718979
JP
1267 @echo ' dir/file.[oisS] - Build specified target only'
1268 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1269 @echo ' (requires a recent binutils and recent build (System.map))'
155ad605 1270 @echo ' dir/file.ko - Build module including final link'
c4d5ee67 1271 @echo ' modules_prepare - Set up for building external modules'
1da177e4
LT
1272 @echo ' tags/TAGS - Generate tags file for editors'
1273 @echo ' cscope - Generate cscope index'
f4ed1009 1274 @echo ' gtags - Generate GNU GLOBAL index'
3f1d9a6c
MM
1275 @echo ' kernelrelease - Output the release version string (use with make -s)'
1276 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1277 @echo ' image_name - Output the image name (use with make -s)'
2fb9b1bd 1278 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1279 echo ' (default: $(INSTALL_HDR_PATH))'; \
2fb9b1bd 1280 echo ''
1da177e4 1281 @echo 'Static analysers'
1da177e4
LT
1282 @echo ' checkstack - Generate a list of stack hogs'
1283 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1284 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1285 @echo ' includecheck - Check for duplicate included header files'
295ac051 1286 @echo ' export_report - List the usages of all exported symbols'
179efcb4 1287 @echo ' headers_check - Sanity check on exported headers'
74425eee
NP
1288 @echo ' headerdep - Detect inclusion cycles in headers'
1289 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1290 @echo ''
5a5da78b
SK
1291 @echo 'Kernel selftest'
1292 @echo ' kselftest - Build and run kernel selftest (run as root)'
1293 @echo ' Build, install, and boot kernel before'
1294 @echo ' running kselftest on it'
1295 @echo ''
1da177e4 1296 @echo 'Kernel packaging:'
6c2133e1 1297 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1298 @echo ''
1299 @echo 'Documentation targets:'
1300 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1301 @echo ''
01dee188 1302 @echo 'Architecture specific targets ($(SRCARCH)):'
1da177e4 1303 @$(if $(archhelp),$(archhelp),\
01dee188 1304 echo ' No architecture specific help defined for $(SRCARCH)')
1da177e4
LT
1305 @echo ''
1306 @$(if $(boards), \
1307 $(foreach b, $(boards), \
1308 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1309 echo '')
5dffbe81
SB
1310 @$(if $(board-dirs), \
1311 $(foreach b, $(board-dirs), \
1312 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1313 printf " %-16s - Show all of the above\\n" help-boards; \
1314 echo '')
1da177e4
LT
1315
1316 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1317 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1318 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1319 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1320 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
af07ce3e 1321 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
28bc20dc
SR
1322 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1323 @echo ' 1: warnings which may be relevant and do not occur too often'
1324 @echo ' 2: warnings which occur quite often but may still be relevant'
1325 @echo ' 3: more obscure warnings, can most likely be ignored'
a6de553d 1326 @echo ' Multiple levels can be combined with W=12 or W=123'
1da177e4
LT
1327 @echo ''
1328 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1329 @echo 'For further info see the ./README file'
1330
1331
5dffbe81
SB
1332help-board-dirs := $(addprefix help-,$(board-dirs))
1333
1334help-boards: $(help-board-dirs)
1335
1336boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1337
1338$(help-board-dirs): help-%:
1339 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1340 @$(if $(boards-per-dir), \
1341 $(foreach b, $(boards-per-dir), \
1342 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1343 echo '')
1344
1345
1da177e4
LT
1346# Documentation targets
1347# ---------------------------------------------------------------------------
1348%docs: scripts_basic FORCE
bffd2020 1349 $(Q)$(MAKE) $(build)=scripts build_docproc
1da177e4
LT
1350 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1351
1352else # KBUILD_EXTMOD
1353
1354###
1355# External module support.
1356# When building external modules the kernel used as basis is considered
1357# read-only, and no consistency checks are made and the make
1358# system is not used on the basis kernel. If updates are required
1359# in the basis kernel ordinary make commands (without M=...) must
1360# be used.
1361#
1362# The following are the only valid targets when building external
1363# modules.
1364# make M=dir clean Delete all automatically generated files
1365# make M=dir modules Make all modules in specified dir
1366# make M=dir Same as 'make M=dir modules'
1367# make M=dir modules_install
070b98bf 1368# Install the modules built in the module directory
1da177e4
LT
1369# Assumes install directory is already created
1370
1371# We are always building modules
1372KBUILD_MODULES := 1
4f193362 1373PHONY += crmodverdir
1da177e4 1374crmodverdir:
7bb9d092 1375 $(cmd_crmodverdir)
1da177e4 1376
4f193362 1377PHONY += $(objtree)/Module.symvers
1da177e4
LT
1378$(objtree)/Module.symvers:
1379 @test -e $(objtree)/Module.symvers || ( \
1380 echo; \
1381 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1382 echo " is missing; modules will have no dependencies and modversions."; \
1383 echo )
1384
1385module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1386PHONY += $(module-dirs) modules
1da177e4
LT
1387$(module-dirs): crmodverdir $(objtree)/Module.symvers
1388 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1389
1390modules: $(module-dirs)
fd54f502 1391 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1392 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1393
4f193362 1394PHONY += modules_install
a67dc21a 1395modules_install: _emodinst_ _emodinst_post
e6304663 1396
4f193362
PS
1397install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1398PHONY += _emodinst_
a67dc21a 1399_emodinst_:
a67dc21a 1400 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1401 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1402
4f193362 1403PHONY += _emodinst_post
a67dc21a
SR
1404_emodinst_post: _emodinst_
1405 $(call cmd,depmod)
1406
1da177e4
LT
1407clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1408
4f193362 1409PHONY += $(clean-dirs) clean
1da177e4
LT
1410$(clean-dirs):
1411 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1412
1413clean: rm-dirs := $(MODVERDIR)
88d7be03 1414clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1da177e4
LT
1415
1416help:
1417 @echo ' Building external modules.'
1418 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1419 @echo ''
1420 @echo ' modules - default target, build the module(s)'
1421 @echo ' modules_install - install the module'
1422 @echo ' clean - remove generated files in module directory only'
1423 @echo ''
06300b21
SR
1424
1425# Dummies...
4f193362 1426PHONY += prepare scripts
06300b21
SR
1427prepare: ;
1428scripts: ;
1da177e4
LT
1429endif # KBUILD_EXTMOD
1430
88d7be03
MM
1431clean: $(clean-dirs)
1432 $(call cmd,rmdirs)
1433 $(call cmd,rmfiles)
43f67c98 1434 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
88d7be03 1435 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
addbcdbb 1436 -o -name '*.ko.*' \
866ced95 1437 -o -name '*.dwo' \
88d7be03
MM
1438 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1439 -o -name '*.symtypes' -o -name 'modules.order' \
1440 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1441 -o -name '*.gcno' \) -type f -print | xargs rm -f
1442
1da177e4
LT
1443# Generate tags for editors
1444# ---------------------------------------------------------------------------
a680eedc
SR
1445quiet_cmd_tags = GEN $@
1446 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1da177e4 1447
f4ed1009 1448tags TAGS cscope gtags: FORCE
1da177e4
LT
1449 $(call cmd,tags)
1450
1da177e4
LT
1451# Scripts to check various things for consistency
1452# ---------------------------------------------------------------------------
1453
279f3dd3
PF
1454PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1455
1da177e4 1456includecheck:
436f876c 1457 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1458 -name '*.[hcS]' -type f -print | sort \
80007434 1459 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1460
1461versioncheck:
2ee2d292 1462 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1463 -name '*.[hcS]' -type f -print | sort \
80007434 1464 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1465
74425eee
NP
1466coccicheck:
1467 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1468
1da177e4
LT
1469namespacecheck:
1470 $(PERL) $(srctree)/scripts/namespace.pl
1471
295ac051
AB
1472export_report:
1473 $(PERL) $(srctree)/scripts/export_report.pl
1474
1da177e4
LT
1475endif #ifeq ($(config-targets),1)
1476endif #ifeq ($(mixed-targets),1)
1477
c398ff00 1478PHONY += checkstack kernelrelease kernelversion image_name
e3ccf6e3 1479
011e3a9a
JD
1480# UML needs a little special treatment here. It wants to use the host
1481# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1482# else wants $(ARCH), including people doing cross-builds, which means
1483# that $(SUBARCH) doesn't work here.
1484ifeq ($(ARCH), um)
1485CHECKSTACK_ARCH := $(SUBARCH)
1486else
1487CHECKSTACK_ARCH := $(ARCH)
1488endif
1da177e4
LT
1489checkstack:
1490 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1491 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4 1492
7b8ea53d
AW
1493kernelrelease:
1494 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
01ab1788 1495
cb58455c 1496kernelversion:
2244cbd8 1497 @echo $(KERNELVERSION)
1da177e4 1498
c398ff00
MM
1499image_name:
1500 @echo $(KBUILD_IMAGE)
1501
ea01fa9f
BP
1502# Clear a bunch of variables before executing the submake
1503tools/: FORCE
bf35182f 1504 $(Q)mkdir -p $(objtree)/tools
a50e4333 1505 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
ea01fa9f
BP
1506
1507tools/%: FORCE
bf35182f 1508 $(Q)mkdir -p $(objtree)/tools
a50e4333 1509 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
ea01fa9f 1510
06300b21
SR
1511# Single targets
1512# ---------------------------------------------------------------------------
bc2546a6 1513# Single targets are compatible with:
e1b8513d 1514# - build with mixed source and output
bc2546a6
SR
1515# - build with separate output dir 'make O=...'
1516# - external modules
1517#
1518# target-dir => where to store outputfile
1519# build-dir => directory in kernel source tree to use
1520
1521ifeq ($(KBUILD_EXTMOD),)
aa360879 1522 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1523 target-dir = $(dir $@)
1524else
1525 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1526 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1527 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1528endif
1529
f6ecebd6 1530%.s: %.c prepare scripts FORCE
bc2546a6 1531 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1532%.i: %.c prepare scripts FORCE
bc2546a6 1533 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1534%.o: %.c prepare scripts FORCE
bc2546a6 1535 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1536%.lst: %.c prepare scripts FORCE
bc2546a6 1537 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1538%.s: %.S prepare scripts FORCE
bc2546a6 1539 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1540%.o: %.S prepare scripts FORCE
bc2546a6 1541 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1542%.symtypes: %.c prepare scripts FORCE
1543 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1544
bc2546a6 1545# Modules
31110ebb
SR
1546/: prepare scripts FORCE
1547 $(cmd_crmodverdir)
1548 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1549 $(build)=$(build-dir)
8e2faea8
PF
1550# Make sure the latest headers are built for Documentation
1551Documentation/: headers_install
31110ebb 1552%/: prepare scripts FORCE
7bb9d092 1553 $(cmd_crmodverdir)
06300b21 1554 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1555 $(build)=$(build-dir)
1556%.ko: prepare scripts FORCE
7bb9d092 1557 $(cmd_crmodverdir)
06300b21 1558 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1559 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1560 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1561
38385f8f 1562# FIXME Should go into a make.lib or something
1da177e4
LT
1563# ===========================================================================
1564
1565quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1566 cmd_rmdirs = rm -rf $(rm-dirs)
1567
1568quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1569 cmd_rmfiles = rm -f $(rm-files)
1570
bc3c26fe 1571# Run depmod only if we have System.map and depmod is executable
50a8ec31 1572quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
569658dd 1573 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
b92021b0 1574 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
50a8ec31 1575
7bb9d092 1576# Create temporary dir for module support files
ab19f879
SR
1577# clean it up only when building all modules
1578cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1579 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1da177e4 1580
1da177e4
LT
1581# read all saved command lines
1582
1583targets := $(wildcard $(sort $(targets)))
1584cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1585
1586ifneq ($(cmd_files),)
1587 $(cmd_files): ; # Do not try to update included dependency files
1588 include $(cmd_files)
1589endif
1590
1da177e4
LT
1591# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1592# Usage:
1593# $(Q)$(MAKE) $(clean)=dir
1594clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1595
1da177e4
LT
1596endif # skip-makefile
1597
4f193362 1598PHONY += FORCE
1da177e4 1599FORCE:
4f193362 1600
4f193362 1601# Declare the contents of the .PHONY variable as phony. We keep that
fe8d0a41 1602# information in a variable so we can use it in if_changed and friends.
4f193362 1603.PHONY: $(PHONY)