]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - Makefile
dm io: reject unsupported DISCARD requests with EOPNOTSUPP
[mirror_ubuntu-bionic-kernel.git] / Makefile
CommitLineData
55922c9d 1VERSION = 3
97bf6af1 2PATCHLEVEL = 19
55922c9d 3SUBLEVEL = 0
bfa76d49 4EXTRAVERSION =
0df1f248 5NAME = Diseased Newt
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++
51b97e35 300HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
070b98bf 301HOSTCXXFLAGS = -O2
1da177e4 302
61163efa
BW
303ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
304HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
305 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
306endif
307
070b98bf
SR
308# Decide whether to build built-in, modular, or both.
309# Normally, just do built-in.
1da177e4
LT
310
311KBUILD_MODULES :=
312KBUILD_BUILTIN := 1
313
3fbb43df
MY
314# If we have only "make modules", don't compile built-in objects.
315# When we're building modules with modversions, we need to consider
316# the built-in objects during the descend as well, in order to
317# make sure the checksums are up to date before we record them.
1da177e4
LT
318
319ifeq ($(MAKECMDGOALS),modules)
320 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
321endif
322
3fbb43df
MY
323# If we have "make <whatever> modules", compile modules
324# in addition to whatever we do anyway.
325# Just "make" or "make all" shall build modules as well
1da177e4
LT
326
327ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
328 KBUILD_MODULES := 1
329endif
330
331ifeq ($(MAKECMDGOALS),)
332 KBUILD_MODULES := 1
333endif
334
e579d351 335export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
336export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
337
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/$(hdr-arch)/include \
90ac086b 394 -Iarch/$(hdr-arch)/include/generated/uapi \
abbf1590
DH
395 -Iarch/$(hdr-arch)/include/generated \
396 $(if $(KBUILD_SRC), -I$(srctree)/include) \
397 -Iinclude \
398 $(USERINCLUDE)
1da177e4 399
d8672b40 400KBUILD_CPPFLAGS := -D__KERNEL__
1da177e4 401
a0f97e06 402KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
94bed2a9 403 -fno-strict-aliasing -fno-common \
a8735821 404 -Werror-implicit-function-declaration \
51b97e35
KS
405 -Wno-format-security \
406 -std=gnu89
a1c48bb1 407
80c00ba9
SR
408KBUILD_AFLAGS_KERNEL :=
409KBUILD_CFLAGS_KERNEL :=
222d394d 410KBUILD_AFLAGS := -D__ASSEMBLY__
6588169d
SR
411KBUILD_AFLAGS_MODULE := -DMODULE
412KBUILD_CFLAGS_MODULE := -DMODULE
413KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
1da177e4 414
f1d28fb0
RZ
415# Read KERNELRELEASE from include/config/kernel.release (if it exists)
416KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
cacd54ef 417KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
cb58455c 418
070b98bf 419export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 420export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
caa27b66 421export CPP AR NM STRIP OBJCOPY OBJDUMP
011bf125 422export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
070b98bf 423export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 424
06c5040c 425export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
2521f2c2 426export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
222d394d 427export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
6588169d 428export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
80c00ba9 429export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
40df759e 430export KBUILD_ARFLAGS
1da177e4
LT
431
432# When compiling out-of-tree modules, put MODVERDIR in the module
433# tree rather than in the kernel tree. The kernel tree might
434# even be read-only.
435export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
436
1da177e4
LT
437# Files to ignore in find ... statements
438
ae63b2d7
PB
439export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
440 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
441 -prune -o
450c6076
JJ
442export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
443 --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
444
445# ===========================================================================
446# Rules shared between *config targets and build targets
447
448# Basic helpers built in scripts/
4f193362 449PHONY += scripts_basic
1da177e4
LT
450scripts_basic:
451 $(Q)$(MAKE) $(build)=scripts/basic
638adb05 452 $(Q)rm -f .tmp_quiet_recordmcount
1da177e4 453
cd05e6bd
JB
454# To avoid any implicit rule to kick in, define an empty command.
455scripts/basic/%: scripts_basic ;
456
4f193362 457PHONY += outputmakefile
fd5f0cd6
JB
458# outputmakefile generates a Makefile in the output directory, if using a
459# separate output directory. This allows convenient use of make in the
460# output directory.
1da177e4 461outputmakefile:
fd5f0cd6 462ifneq ($(KBUILD_SRC),)
92979997 463 $(Q)ln -fsn $(srctree) source
fd5f0cd6
JB
464 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
465 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
466endif
1da177e4 467
d8ecc5cd
SR
468# Support for using generic headers in asm-generic
469PHONY += asm-generic
470asm-generic:
471 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
3c5994c8
CM
472 src=asm obj=arch/$(SRCARCH)/include/generated/asm
473 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
474 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
d8ecc5cd 475
1da177e4
LT
476# To make sure we do not include .config for any of the *config targets
477# catch them early, and hand them over to scripts/kconfig/Makefile
478# It is allowed to specify more targets when calling make, including
479# mixing *config targets and build targets.
070b98bf 480# For example 'make oldconfig all'.
1da177e4
LT
481# Detect when mixed targets is specified, and make a second invocation
482# of make so .config is not included in this case either (for *config).
483
10b63956 484version_h := include/generated/uapi/linux/version.h
223c24a7 485old_version_h := include/linux/version.h
d183e6f5 486
3eb3c740 487no-dot-config-targets := clean mrproper distclean \
fbae4d58 488 cscope gtags TAGS tags help% %docs check% coccicheck \
d183e6f5 489 $(version_h) headers_% archheaders archscripts \
4aed2fd8 490 kernelversion %src-pkg
1da177e4
LT
491
492config-targets := 0
493mixed-targets := 0
494dot-config := 1
495
496ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
497 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
498 dot-config := 0
499 endif
500endif
501
502ifeq ($(KBUILD_EXTMOD),)
503 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
504 config-targets := 1
505 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
506 mixed-targets := 1
507 endif
508 endif
509endif
510
511ifeq ($(mixed-targets),1)
512# ===========================================================================
513# We're called with mixed targets (*config and build targets).
514# Handle them one by one.
515
9319f453
MY
516PHONY += $(MAKECMDGOALS) __build_one_by_one
517
518$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
519 @:
520
521__build_one_by_one:
522 $(Q)set -e; \
523 for i in $(MAKECMDGOALS); do \
524 $(MAKE) -f $(srctree)/Makefile $$i; \
525 done
1da177e4
LT
526
527else
528ifeq ($(config-targets),1)
529# ===========================================================================
530# *config targets only - make sure prerequisites are updated, and descend
531# in scripts/kconfig to make the *config target
532
533# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
534# KBUILD_DEFCONFIG may point out an alternative default configuration
535# used for 'make defconfig'
74b469f2 536include $(srctree)/arch/$(SRCARCH)/Makefile
61bee204 537export KBUILD_DEFCONFIG KBUILD_KCONFIG
1da177e4 538
31110ebb 539config: scripts_basic outputmakefile FORCE
31110ebb
SR
540 $(Q)$(MAKE) $(build)=scripts/kconfig $@
541
542%config: scripts_basic outputmakefile FORCE
1da177e4
LT
543 $(Q)$(MAKE) $(build)=scripts/kconfig $@
544
545else
546# ===========================================================================
547# Build targets only - this includes vmlinux, arch specific targets, clean
548# targets and others. In general all targets except *config targets.
549
550ifeq ($(KBUILD_EXTMOD),)
551# Additional helpers built in scripts/
552# Carefully list dependencies so we do not try to build scripts twice
070b98bf 553# in parallel
4f193362 554PHONY += scripts
a54292f5
AS
555scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
556 asm-generic
1da177e4
LT
557 $(Q)$(MAKE) $(build)=$(@)
558
1da177e4
LT
559# Objects we will link into vmlinux / subdirs we need to visit
560init-y := init/
4d2acfbf 561drivers-y := drivers/ sound/ firmware/
1da177e4
LT
562net-y := net/
563libs-y := lib/
564core-y := usr/
565endif # KBUILD_EXTMOD
566
567ifeq ($(dot-config),1)
9ee4e336
SR
568# Read in config
569-include include/config/auto.conf
1da177e4 570
9ee4e336 571ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
572# Read in dependencies to all Kconfig* files, make sure to run
573# oldconfig if changes are detected.
c955ccaf 574-include include/config/auto.conf.cmd
1da177e4 575
1da177e4 576# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 577$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 578
c955ccaf 579# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 580# with it and forgot to run make oldconfig.
070b98bf 581# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 582# we execute the config step to be sure to catch updated Kconfig files
bc081dd6 583include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 584 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 585else
264a2683 586# external modules needs include/generated/autoconf.h and include/config/auto.conf
9ee4e336
SR
587# but do not care if they are up-to-date. Use auto.conf to trigger the test
588PHONY += include/config/auto.conf
589
590include/config/auto.conf:
264a2683 591 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
5369f550
MM
592 echo >&2; \
593 echo >&2 " ERROR: Kernel configuration is invalid."; \
594 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
595 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
596 echo >&2 ; \
9ee4e336
SR
597 /bin/false)
598
599endif # KBUILD_EXTMOD
c955ccaf 600
1da177e4
LT
601else
602# Dummy target needed, because used as prerequisite
c955ccaf 603include/config/auto.conf: ;
9ee4e336 604endif # $(dot-config)
1da177e4
LT
605
606# The all: target is the default when no target is given on the
607# command line.
608# This allow a user to issue only 'make' to build a kernel including modules
c8447161 609# Defaults to vmlinux, but the arch makefile usually adds further targets
1da177e4
LT
610all: vmlinux
611
a1c48bb1
GU
612include $(srctree)/arch/$(SRCARCH)/Makefile
613
614KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
615
1da177e4 616ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
e74fc973 617KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
1da177e4 618else
a0f97e06 619KBUILD_CFLAGS += -O2
1da177e4
LT
620endif
621
69102311
JK
622# Tell gcc to never replace conditional load with a non-conditional one
623KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
624
1873e870
AK
625ifdef CONFIG_READABLE_ASM
626# Disable optimizations that make assembler listings hard to read.
627# reorder blocks reorders the control in the function
628# ipa clone creates specialized cloned functions
629# partial inlining inlines only parts of functions
630KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
631 $(call cc-option,-fno-ipa-cp-clone,) \
632 $(call cc-option,-fno-partial-inlining)
633endif
634
08f67461 635ifneq ($(CONFIG_FRAME_WARN),0)
35bb5b1e
AK
636KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
637endif
638
19952a92 639# Handle stack protector mode.
1332429b
KC
640#
641# Since kbuild can potentially perform two passes (first with the old
642# .config values and then with updated .config values), we cannot error out
643# if a desired compiler option is unsupported. If we were to error, kbuild
644# could never get to the second pass and actually notice that we changed
645# the option to something that was supported.
646#
647# Additionally, we don't want to fallback and/or silently change which compiler
648# flags will be used, since that leads to producing kernels with different
649# security feature characteristics depending on the compiler used. ("But I
650# selected CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
651#
652# The middle ground is to warn here so that the failed option is obvious, but
653# to let the build fail with bad compiler flags so that we can't produce a
654# kernel when there is a CONFIG and compiler mismatch.
655#
8779657d 656ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
19952a92
KC
657 stackp-flag := -fstack-protector
658 ifeq ($(call cc-option, $(stackp-flag)),)
6c15b327 659 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: \
27b2a49a 660 -fstack-protector not supported by compiler)
19952a92 661 endif
6c15b327
JB
662else
663ifdef CONFIG_CC_STACKPROTECTOR_STRONG
8779657d
KC
664 stackp-flag := -fstack-protector-strong
665 ifeq ($(call cc-option, $(stackp-flag)),)
666 $(warning Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: \
667 -fstack-protector-strong not supported by compiler)
668 endif
19952a92
KC
669else
670 # Force off for distro compilers that enable stack protector by default.
671 stackp-flag := $(call cc-option, -fno-stack-protector)
5d707e9c 672endif
6c15b327 673endif
19952a92 674KBUILD_CFLAGS += $(stackp-flag)
e06b8b98 675
61163efa
BW
676ifeq ($(COMPILER),clang)
677KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
678KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,)
679KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
680KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
681KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
682# Quiet clang warning: comparison of unsigned expression < 0 is always false
683KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
684# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
685# source of a reference will be _MergedGlobals and not on of the whitelisted names.
686# See modpost pattern 2
687KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
26ea6bb1 688KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
61163efa
BW
689else
690
af0e5d56
DJ
691# This warning generated too much noise in a regular build.
692# Use make W=1 to enable this warning (see scripts/Makefile.build)
8417da6f 693KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
61163efa 694endif
af0e5d56 695
1da177e4 696ifdef CONFIG_FRAME_POINTER
a0f97e06 697KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 698else
7e9501fd
RV
699# Some targets (ARM with Thumb2, for example), can't be built with frame
700# pointers. For those, we don't have FUNCTION_TRACER automatically
701# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
702# incompatible with -fomit-frame-pointer with current GCC, so we don't use
703# -fomit-frame-pointer with FUNCTION_TRACER.
704ifndef CONFIG_FUNCTION_TRACER
a0f97e06 705KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4 706endif
7e9501fd 707endif
1da177e4 708
2062afb4
LT
709KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
710
1da177e4 711ifdef CONFIG_DEBUG_INFO
866ced95
AK
712ifdef CONFIG_DEBUG_INFO_SPLIT
713KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
714else
a0f97e06 715KBUILD_CFLAGS += -g
866ced95 716endif
2288328c 717KBUILD_AFLAGS += -Wa,-gdwarf-2
1da177e4 718endif
bfaf2dd3
AK
719ifdef CONFIG_DEBUG_INFO_DWARF4
720KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
721endif
1da177e4 722
d6f4ceb7 723ifdef CONFIG_DEBUG_INFO_REDUCED
e82c4bb8
AK
724KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
725 $(call cc-option,-fno-var-tracking)
d6f4ceb7
AK
726endif
727
606576ce 728ifdef CONFIG_FUNCTION_TRACER
c0a80c0c
HC
729ifndef CC_FLAGS_FTRACE
730CC_FLAGS_FTRACE := -pg
731endif
732export CC_FLAGS_FTRACE
a2546fae
SR
733ifdef CONFIG_HAVE_FENTRY
734CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
735endif
c0a80c0c 736KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
a2546fae 737KBUILD_AFLAGS += $(CC_USING_FENTRY)
72441cb1 738ifdef CONFIG_DYNAMIC_FTRACE
cf4db259 739 ifdef CONFIG_HAVE_C_RECORDMCOUNT
72441cb1
SR
740 BUILD_C_RECORDMCOUNT := y
741 export BUILD_C_RECORDMCOUNT
742 endif
743endif
16444a8a
ACM
744endif
745
91341d4b
SR
746# We trigger additional mismatches with less inlining
747ifdef CONFIG_DEBUG_SECTION_MISMATCH
748KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
749endif
750
e8e69931 751# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 752NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
753CHECKFLAGS += $(NOSTDINC_FLAGS)
754
1da177e4 755# warn about C99 declaration after statement
a0f97e06 756KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 757
070b98bf 758# disable pointer signed / unsigned warnings in gcc 4.0
8417da6f 759KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
1da177e4 760
fe8d0a41 761# disable invalid "can't wrap" optimizations for signed / pointers
a137802e 762KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
d0115552 763
8f7f5c9f
AK
764# conserve stack if available
765KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
766
80970472
ST
767# disallow errors like 'EXPORT_GPL(foo);' with missing header
768KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
769
770# require functions to have arguments in prototypes, not empty 'int foo()'
771KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
772
fe7c36c7
JT
773# Prohibit date/time macros, which would make the build non-deterministic
774KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
775
40df759e
MM
776# use the deterministic mode of AR if available
777KBUILD_ARFLAGS := $(call ar-option,D)
778
bf5438fc
JB
779# check for 'asm goto'
780ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
781 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
782endif
783
a86fe353
MY
784include $(srctree)/scripts/Makefile.extrawarn
785
06c5040c 786# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
70cfe026
787KBUILD_CPPFLAGS += $(KCPPFLAGS)
788KBUILD_AFLAGS += $(KAFLAGS)
789KBUILD_CFLAGS += $(KCFLAGS)
52bcc330 790
18991197
RM
791# Use --build-id when available.
792LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
f86fd306 793 $(call cc-ldoption, -Wl$(comma)--build-id,))
6588169d 794KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
18991197
RM
795LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
796
5d7d18f5 797ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
d79a2719 798LDFLAGS_vmlinux += $(call ld-option, -X,)
5d7d18f5
DH
799endif
800
1da177e4 801# Default kernel image to build when no specific target is given.
070b98bf 802# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
803# set in the environment
804# Also any assignments in arch/$(ARCH)/Makefile take precedence over
805# this default value
806export KBUILD_IMAGE ?= vmlinux
807
808#
809# INSTALL_PATH specifies where to place the updated kernel and system map
810# images. Default is /boot, but you can set it to other values
811export INSTALL_PATH ?= /boot
812
f4d4ffc0
JC
813#
814# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
815# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
816# an argument if needed. Otherwise it defaults to the kernel install path
817#
818export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
819
1da177e4
LT
820#
821# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
822# relocations required by build roots. This is not defined in the
070b98bf 823# makefile but the argument can be passed to make if needed.
1da177e4
LT
824#
825
df9df036 826MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
827export MODLIB
828
ac031f26 829#
3fbb43df
MY
830# INSTALL_MOD_STRIP, if defined, will cause modules to be
831# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
832# the default option --strip-debug will be used. Otherwise,
833# INSTALL_MOD_STRIP value will be used as the options to the strip command.
2ea03891 834
ac031f26
TT
835ifdef INSTALL_MOD_STRIP
836ifeq ($(INSTALL_MOD_STRIP),1)
2ea03891 837mod_strip_cmd = $(STRIP) --strip-debug
ac031f26 838else
2ea03891 839mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
ac031f26
TT
840endif # INSTALL_MOD_STRIP=1
841else
2ea03891 842mod_strip_cmd = true
ac031f26
TT
843endif # INSTALL_MOD_STRIP
844export mod_strip_cmd
845
beb50df3
BJ
846# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
847# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
848# or CONFIG_MODULE_COMPRESS_XZ.
849
850mod_compress_cmd = true
851ifdef CONFIG_MODULE_COMPRESS
852 ifdef CONFIG_MODULE_COMPRESS_GZIP
853 mod_compress_cmd = gzip -n
854 endif # CONFIG_MODULE_COMPRESS_GZIP
855 ifdef CONFIG_MODULE_COMPRESS_XZ
856 mod_compress_cmd = xz
857 endif # CONFIG_MODULE_COMPRESS_XZ
858endif # CONFIG_MODULE_COMPRESS
859export mod_compress_cmd
860
1bf49dd4 861# Select initial ramdisk compression format, default is gzip(1).
862# This shall be used by the dracut(8) tool while creating an initramfs image.
863#
7ac18156
JB
864INITRD_COMPRESS-y := gzip
865INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
866INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
867INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
868INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
869INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
b7000ade
LT
870# do not export INITRD_COMPRESS, since we didn't actually
871# choose a sane default compression above.
872# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1da177e4 873
d9d8d7ed 874ifdef CONFIG_MODULE_SIG_ALL
e2a666d5
RR
875MODSECKEY = ./signing_key.priv
876MODPUBKEY = ./signing_key.x509
877export MODPUBKEY
4bc9410c 878mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
e2a666d5
RR
879else
880mod_sign_cmd = true
881endif
882export mod_sign_cmd
883
884
1da177e4 885ifeq ($(KBUILD_EXTMOD),)
3a65dfe8 886core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
887
888vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
889 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
890 $(net-y) $(net-m) $(libs-y) $(libs-m)))
891
892vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
30142230 893 $(init-) $(core-) $(drivers-) $(net-) $(libs-))))
1da177e4
LT
894
895init-y := $(patsubst %/, %/built-in.o, $(init-y))
896core-y := $(patsubst %/, %/built-in.o, $(core-y))
897drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
898net-y := $(patsubst %/, %/built-in.o, $(net-y))
899libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
900libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
901libs-y := $(libs-y1) $(libs-y2)
902
1f2bfbd0 903# Externally visible symbols (used by link-vmlinux.sh)
95698570
SR
904export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
905export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
906export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1f2bfbd0 907export LDFLAGS_vmlinux
6615d6c3
MM
908# used by scripts/pacmage/Makefile
909export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
9bb48247 910
1f2bfbd0 911vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN)
1da177e4 912
1f2bfbd0
SR
913# Final link of vmlinux
914 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
915quiet_cmd_link-vmlinux = LINK $@
1da177e4 916
1f2bfbd0
SR
917# Include targets which we want to
918# execute if the rest of the kernel build went well.
919vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
0f836e5f 920ifdef CONFIG_HEADERS_CHECK
0e7af8d0 921 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025
MD
922endif
923ifdef CONFIG_SAMPLES
924 $(Q)$(MAKE) $(build)=samples
3794f3e8
RD
925endif
926ifdef CONFIG_BUILD_DOCSRC
927 $(Q)$(MAKE) $(build)=Documentation
0f836e5f 928endif
1f2bfbd0 929 +$(call if_changed,link-vmlinux)
741f98fe 930
38385f8f 931# The actual objects are generated when descending,
1da177e4 932# make sure no implicit rule kicks in
1f2bfbd0 933$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1da177e4
LT
934
935# Handle descending into subdirectories listed in $(vmlinux-dirs)
936# Preset locale variables to speed up the build process. Limit locale
937# tweaks to this spot to avoid wrong language settings when running
938# make menuconfig etc.
939# Error messages still appears in the original language
940
4f193362 941PHONY += $(vmlinux-dirs)
5bb78269 942$(vmlinux-dirs): prepare scripts
1da177e4
LT
943 $(Q)$(MAKE) $(build)=$@
944
0d0e7718
MM
945define filechk_kernel.release
946 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
947endef
948
83a35e36 949# Store (new) KERNELRELEASE string in include/config/kernel.release
f1d28fb0 950include/config/kernel.release: include/config/auto.conf FORCE
0d0e7718 951 $(call filechk,kernel.release)
cb58455c
SR
952
953
1da177e4 954# Things we need to do before we recursively start building the kernel
5bb78269
SR
955# or the modules are listed in "prepare".
956# A multi level approach is used. prepareN is processed before prepareN-1.
957# archprepare is used in arch Makefiles and when processed asm symlink,
958# version.h and scripts_basic is processed / created.
1da177e4 959
5bb78269 960# Listed in dependency order
4f193362 961PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 962
86feeaa8 963# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
964# and if so do:
965# 1) Check that make has not been executed in the kernel src $(srctree)
f1d28fb0 966prepare3: include/config/kernel.release
1da177e4 967ifneq ($(KBUILD_SRC),)
fd54f502 968 @$(kecho) ' Using $(srctree) as source for kernel'
c955ccaf 969 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
5369f550
MM
970 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
971 echo >&2 " in the '$(srctree)' directory.";\
1da177e4
LT
972 /bin/false; \
973 fi;
1da177e4
LT
974endif
975
86feeaa8 976# prepare2 creates a makefile if using a separate output directory
d8ecc5cd 977prepare2: prepare3 outputmakefile asm-generic
1da177e4 978
d183e6f5 979prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
f7f16b77 980 include/config/auto.conf
7bb9d092 981 $(cmd_crmodverdir)
1da177e4 982
6520fe55 983archprepare: archheaders archscripts prepare1 scripts_basic
5bb78269
SR
984
985prepare0: archprepare FORCE
8d36a623 986 $(Q)$(MAKE) $(build)=.
86feeaa8 987
1da177e4 988# All the preparing..
d395efb5 989prepare: prepare0
1da177e4 990
1da177e4
LT
991# Generate some files
992# ---------------------------------------------------------------------------
993
994# KERNELRELEASE can change from a few different places, meaning version.h
995# needs to be updated, so this check is forced on all builds
996
997uts_len := 64
63104eec
SR
998define filechk_utsrelease.h
999 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1000 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1001 exit 1; \
1002 fi; \
1003 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1004endef
1da177e4
LT
1005
1006define filechk_version.h
450c6076
JJ
1007 (echo \#define LINUX_VERSION_CODE $(shell \
1008 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
63104eec 1009 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
1010endef
1011
d183e6f5 1012$(version_h): $(srctree)/Makefile FORCE
1da177e4 1013 $(call filechk,version.h)
223c24a7 1014 $(Q)rm -f $(old_version_h)
1da177e4 1015
273b281f 1016include/generated/utsrelease.h: include/config/kernel.release FORCE
63104eec
SR
1017 $(call filechk,utsrelease.h)
1018
179efcb4
VN
1019PHONY += headerdep
1020headerdep:
9663d989
PF
1021 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1022 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
179efcb4 1023
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 = $(objtree)/usr
6d716275 1045
2fb9b1bd
SR
1046# If we do an all arch process set dst to asm-$(hdr-arch)
1047hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
e6883b18 1048
052ad274
PA
1049PHONY += archheaders
1050archheaders:
1051
6520fe55
PA
1052PHONY += archscripts
1053archscripts:
1054
e6883b18 1055PHONY += __headers
d183e6f5 1056__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
e1b702cf 1057 $(Q)$(MAKE) $(build)=scripts build_unifdef
e6883b18
SR
1058
1059PHONY += headers_install_all
2fb9b1bd
SR
1060headers_install_all:
1061 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
6d716275 1062
8d730cfb 1063PHONY += headers_install
e6883b18 1064headers_install: __headers
10b63956
DH
1065 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1066 $(error Headers not exportable for the $(SRCARCH) architecture))
1067 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1068 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
8d730cfb 1069
1f85712e
MF
1070PHONY += headers_check_all
1071headers_check_all: headers_install_all
2fb9b1bd 1072 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1f85712e 1073
68475359
DW
1074PHONY += headers_check
1075headers_check: headers_install
10b63956
DH
1076 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
1077 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
68475359 1078
5a5da78b
SK
1079# ---------------------------------------------------------------------------
1080# Kernel selftest
1081
1082PHONY += kselftest
1083kselftest:
1084 $(Q)$(MAKE) -C tools/testing/selftests run_tests
1085
1da177e4
LT
1086# ---------------------------------------------------------------------------
1087# Modules
1088
1089ifdef CONFIG_MODULES
1090
070b98bf 1091# By default, build modules as well
1da177e4 1092
73d1393e 1093all: modules
1da177e4 1094
3fbb43df 1095# Build modules
551559e1 1096#
3fbb43df
MY
1097# A module can be listed more than once in obj-m resulting in
1098# duplicate lines in modules.order files. Those are removed
1099# using awk while concatenating to the final file.
1da177e4 1100
4f193362 1101PHONY += modules
2da30e70 1102modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
551559e1 1103 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
fd54f502 1104 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1105 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
44463f7d 1106 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1da177e4 1107
a6c36632
MM
1108modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1109 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1110
73d1393e 1111%/modules.builtin: include/config/auto.conf
a6c36632
MM
1112 $(Q)$(MAKE) $(modbuiltin)=$*
1113
1da177e4
LT
1114
1115# Target to prepare building external modules
4f193362 1116PHONY += modules_prepare
5bb78269 1117modules_prepare: prepare scripts
1da177e4
LT
1118
1119# Target to install modules
4f193362 1120PHONY += modules_install
1da177e4
LT
1121modules_install: _modinst_ _modinst_post
1122
4f193362 1123PHONY += _modinst_
2da30e70 1124_modinst_:
1da177e4
LT
1125 @rm -rf $(MODLIB)/kernel
1126 @rm -f $(MODLIB)/source
1127 @mkdir -p $(MODLIB)/kernel
890676c6 1128 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
1da177e4
LT
1129 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1130 rm -f $(MODLIB)/build ; \
7e1c0477 1131 ln -s $(CURDIR) $(MODLIB)/build ; \
1da177e4 1132 fi
551559e1 1133 @cp -f $(objtree)/modules.order $(MODLIB)/
bc081dd6 1134 @cp -f $(objtree)/modules.builtin $(MODLIB)/
b805aa0e 1135 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1136
50a8ec31 1137# This depmod is only for convenience to give the initial
1da177e4
LT
1138# boot a modules.dep even before / is mounted read-write. However the
1139# boot script depmod is the master version.
4f193362 1140PHONY += _modinst_post
6d128e1e 1141_modinst_post: _modinst_
88ecf814 1142 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
50a8ec31 1143 $(call cmd,depmod)
1da177e4 1144
d890f510
JB
1145ifeq ($(CONFIG_MODULE_SIG), y)
1146PHONY += modules_sign
1147modules_sign:
1148 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1149endif
1150
1da177e4
LT
1151else # CONFIG_MODULES
1152
1153# Modules not configured
1154# ---------------------------------------------------------------------------
1155
1156modules modules_install: FORCE
5369f550
MM
1157 @echo >&2
1158 @echo >&2 "The present kernel configuration has modules disabled."
1159 @echo >&2 "Type 'make config' and enable loadable module support."
1160 @echo >&2 "Then build a kernel with module support enabled."
1161 @echo >&2
1da177e4
LT
1162 @exit 1
1163
1164endif # CONFIG_MODULES
1165
1da177e4
LT
1166###
1167# Cleaning is done on three levels.
1168# make clean Delete most generated files
1169# Leave enough to build external modules
1170# make mrproper Delete the current configuration, and all generated files
1171# make distclean Remove editor backup files, patch leftover files and the like
1172
1173# Directories & files removed with 'make clean'
1174CLEAN_DIRS += $(MODVERDIR)
1da177e4
LT
1175
1176# Directories & files removed with 'make mrproper'
d8ecc5cd 1177MRPROPER_DIRS += include/config usr/include include/generated \
3fbb43df 1178 arch/*/include/generated .tmp_objdiff
d183e6f5 1179MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
d5b71936
RR
1180 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1181 signing_key.priv signing_key.x509 x509.genkey \
1182 extra_certificates signing_key.x509.keyid \
223c24a7 1183 signing_key.x509.signer
1da177e4
LT
1184
1185# clean - Delete most, but leave enough to build external modules
1186#
1187clean: rm-dirs := $(CLEAN_DIRS)
1188clean: rm-files := $(CLEAN_FILES)
fb68d4be 1189clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1da177e4 1190
bd1ee804 1191PHONY += $(clean-dirs) clean archclean vmlinuxclean
1da177e4
LT
1192$(clean-dirs):
1193 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1194
bd1ee804
PM
1195vmlinuxclean:
1196 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1197
1198clean: archclean vmlinuxclean
1da177e4
LT
1199
1200# mrproper - Delete all generated files, including .config
1201#
1202mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1203mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1204mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1205
4f193362 1206PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1207$(mrproper-dirs):
1208 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1209
1210mrproper: clean archmrproper $(mrproper-dirs)
1211 $(call cmd,rmdirs)
1212 $(call cmd,rmfiles)
1213
1214# distclean
1215#
4f193362 1216PHONY += distclean
1da177e4
LT
1217
1218distclean: mrproper
1219 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1220 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1da177e4 1221 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
a03fcb50 1222 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \
1da177e4
LT
1223 -type f -print | xargs rm -f
1224
1225
1226# Packaging of the kernel to various formats
1227# ---------------------------------------------------------------------------
1228# rpm target kept for backward compatibility
c79624c1 1229package-dir := scripts/package
1da177e4 1230
bafb6747
ACM
1231%src-pkg: FORCE
1232 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1233%pkg: include/config/kernel.release FORCE
6c2133e1 1234 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1235rpm: include/config/kernel.release FORCE
6c2133e1 1236 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1237
1238
1239# Brief documentation of the typical targets used
1240# ---------------------------------------------------------------------------
1241
5dffbe81 1242boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
a1e7b7bb 1243boards := $(sort $(notdir $(boards)))
5dffbe81
SB
1244board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1245board-dirs := $(sort $(notdir $(board-dirs:/=)))
1da177e4
LT
1246
1247help:
1248 @echo 'Cleaning targets:'
5ea084ef 1249 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1250 @echo ' enough build support to build external modules'
5ea084ef 1251 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1252 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1253 @echo ''
1254 @echo 'Configuration targets:'
1255 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1256 @echo ''
1257 @echo 'Other generic targets:'
1258 @echo ' all - Build all targets marked with [*]'
1259 @echo '* vmlinux - Build the bare kernel'
1260 @echo '* modules - Build all modules'
9cc5d74c 1261 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
88ecf814
DW
1262 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1263 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1da177e4 1264 @echo ' dir/ - Build all files in dir and below'
62718979
JP
1265 @echo ' dir/file.[oisS] - Build specified target only'
1266 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1267 @echo ' (requires a recent binutils and recent build (System.map))'
155ad605 1268 @echo ' dir/file.ko - Build module including final link'
c4d5ee67 1269 @echo ' modules_prepare - Set up for building external modules'
1da177e4
LT
1270 @echo ' tags/TAGS - Generate tags file for editors'
1271 @echo ' cscope - Generate cscope index'
f4ed1009 1272 @echo ' gtags - Generate GNU GLOBAL index'
3f1d9a6c
MM
1273 @echo ' kernelrelease - Output the release version string (use with make -s)'
1274 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1275 @echo ' image_name - Output the image name (use with make -s)'
2fb9b1bd 1276 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1277 echo ' (default: $(INSTALL_HDR_PATH))'; \
2fb9b1bd 1278 echo ''
1da177e4 1279 @echo 'Static analysers'
1da177e4
LT
1280 @echo ' checkstack - Generate a list of stack hogs'
1281 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1282 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1283 @echo ' includecheck - Check for duplicate included header files'
295ac051 1284 @echo ' export_report - List the usages of all exported symbols'
179efcb4 1285 @echo ' headers_check - Sanity check on exported headers'
74425eee
NP
1286 @echo ' headerdep - Detect inclusion cycles in headers'
1287 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1288 @echo ''
5a5da78b
SK
1289 @echo 'Kernel selftest'
1290 @echo ' kselftest - Build and run kernel selftest (run as root)'
1291 @echo ' Build, install, and boot kernel before'
1292 @echo ' running kselftest on it'
1293 @echo ''
1da177e4 1294 @echo 'Kernel packaging:'
6c2133e1 1295 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1296 @echo ''
1297 @echo 'Documentation targets:'
1298 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1299 @echo ''
01dee188 1300 @echo 'Architecture specific targets ($(SRCARCH)):'
1da177e4 1301 @$(if $(archhelp),$(archhelp),\
01dee188 1302 echo ' No architecture specific help defined for $(SRCARCH)')
1da177e4
LT
1303 @echo ''
1304 @$(if $(boards), \
1305 $(foreach b, $(boards), \
1306 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1307 echo '')
5dffbe81
SB
1308 @$(if $(board-dirs), \
1309 $(foreach b, $(board-dirs), \
1310 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1311 printf " %-16s - Show all of the above\\n" help-boards; \
1312 echo '')
1da177e4
LT
1313
1314 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1315 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1316 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
701842e3
DK
1317 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1318 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
af07ce3e 1319 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
28bc20dc
SR
1320 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1321 @echo ' 1: warnings which may be relevant and do not occur too often'
1322 @echo ' 2: warnings which occur quite often but may still be relevant'
1323 @echo ' 3: more obscure warnings, can most likely be ignored'
a6de553d 1324 @echo ' Multiple levels can be combined with W=12 or W=123'
1da177e4
LT
1325 @echo ''
1326 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1327 @echo 'For further info see the ./README file'
1328
1329
5dffbe81
SB
1330help-board-dirs := $(addprefix help-,$(board-dirs))
1331
1332help-boards: $(help-board-dirs)
1333
fbae4d58 1334boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
5dffbe81
SB
1335
1336$(help-board-dirs): help-%:
1337 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1338 @$(if $(boards-per-dir), \
1339 $(foreach b, $(boards-per-dir), \
1340 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1341 echo '')
1342
1343
1da177e4
LT
1344# Documentation targets
1345# ---------------------------------------------------------------------------
1346%docs: scripts_basic FORCE
bffd2020 1347 $(Q)$(MAKE) $(build)=scripts build_docproc
1da177e4
LT
1348 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1349
1350else # KBUILD_EXTMOD
1351
1352###
1353# External module support.
1354# When building external modules the kernel used as basis is considered
1355# read-only, and no consistency checks are made and the make
1356# system is not used on the basis kernel. If updates are required
1357# in the basis kernel ordinary make commands (without M=...) must
1358# be used.
1359#
1360# The following are the only valid targets when building external
1361# modules.
1362# make M=dir clean Delete all automatically generated files
1363# make M=dir modules Make all modules in specified dir
1364# make M=dir Same as 'make M=dir modules'
1365# make M=dir modules_install
070b98bf 1366# Install the modules built in the module directory
1da177e4
LT
1367# Assumes install directory is already created
1368
1369# We are always building modules
1370KBUILD_MODULES := 1
4f193362 1371PHONY += crmodverdir
1da177e4 1372crmodverdir:
7bb9d092 1373 $(cmd_crmodverdir)
1da177e4 1374
4f193362 1375PHONY += $(objtree)/Module.symvers
1da177e4
LT
1376$(objtree)/Module.symvers:
1377 @test -e $(objtree)/Module.symvers || ( \
1378 echo; \
1379 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1380 echo " is missing; modules will have no dependencies and modversions."; \
1381 echo )
1382
1383module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1384PHONY += $(module-dirs) modules
1da177e4
LT
1385$(module-dirs): crmodverdir $(objtree)/Module.symvers
1386 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1387
1388modules: $(module-dirs)
fd54f502 1389 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1390 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1391
4f193362 1392PHONY += modules_install
a67dc21a 1393modules_install: _emodinst_ _emodinst_post
e6304663 1394
4f193362
PS
1395install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1396PHONY += _emodinst_
a67dc21a 1397_emodinst_:
a67dc21a 1398 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1399 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1400
4f193362 1401PHONY += _emodinst_post
a67dc21a
SR
1402_emodinst_post: _emodinst_
1403 $(call cmd,depmod)
1404
1da177e4
LT
1405clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1406
4f193362 1407PHONY += $(clean-dirs) clean
1da177e4
LT
1408$(clean-dirs):
1409 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1410
1411clean: rm-dirs := $(MODVERDIR)
88d7be03 1412clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1da177e4
LT
1413
1414help:
1415 @echo ' Building external modules.'
1416 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1417 @echo ''
1418 @echo ' modules - default target, build the module(s)'
1419 @echo ' modules_install - install the module'
1420 @echo ' clean - remove generated files in module directory only'
1421 @echo ''
06300b21
SR
1422
1423# Dummies...
4f193362 1424PHONY += prepare scripts
06300b21
SR
1425prepare: ;
1426scripts: ;
1da177e4
LT
1427endif # KBUILD_EXTMOD
1428
88d7be03
MM
1429clean: $(clean-dirs)
1430 $(call cmd,rmdirs)
1431 $(call cmd,rmfiles)
43f67c98 1432 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
88d7be03 1433 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
addbcdbb 1434 -o -name '*.ko.*' \
866ced95 1435 -o -name '*.dwo' \
88d7be03
MM
1436 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1437 -o -name '*.symtypes' -o -name 'modules.order' \
1438 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1439 -o -name '*.gcno' \) -type f -print | xargs rm -f
1440
1da177e4
LT
1441# Generate tags for editors
1442# ---------------------------------------------------------------------------
a680eedc
SR
1443quiet_cmd_tags = GEN $@
1444 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1da177e4 1445
f4ed1009 1446tags TAGS cscope gtags: FORCE
1da177e4
LT
1447 $(call cmd,tags)
1448
1da177e4
LT
1449# Scripts to check various things for consistency
1450# ---------------------------------------------------------------------------
1451
279f3dd3
PF
1452PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1453
1da177e4 1454includecheck:
436f876c 1455 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1456 -name '*.[hcS]' -type f -print | sort \
80007434 1457 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1458
1459versioncheck:
2ee2d292 1460 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1461 -name '*.[hcS]' -type f -print | sort \
80007434 1462 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1463
74425eee
NP
1464coccicheck:
1465 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1466
1da177e4
LT
1467namespacecheck:
1468 $(PERL) $(srctree)/scripts/namespace.pl
1469
295ac051
AB
1470export_report:
1471 $(PERL) $(srctree)/scripts/export_report.pl
1472
1da177e4
LT
1473endif #ifeq ($(config-targets),1)
1474endif #ifeq ($(mixed-targets),1)
1475
c398ff00 1476PHONY += checkstack kernelrelease kernelversion image_name
e3ccf6e3 1477
011e3a9a
JD
1478# UML needs a little special treatment here. It wants to use the host
1479# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1480# else wants $(ARCH), including people doing cross-builds, which means
1481# that $(SUBARCH) doesn't work here.
1482ifeq ($(ARCH), um)
1483CHECKSTACK_ARCH := $(SUBARCH)
1484else
1485CHECKSTACK_ARCH := $(ARCH)
1486endif
1da177e4
LT
1487checkstack:
1488 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1489 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4 1490
7b8ea53d
AW
1491kernelrelease:
1492 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
01ab1788 1493
cb58455c 1494kernelversion:
2244cbd8 1495 @echo $(KERNELVERSION)
1da177e4 1496
c398ff00
MM
1497image_name:
1498 @echo $(KBUILD_IMAGE)
1499
ea01fa9f
BP
1500# Clear a bunch of variables before executing the submake
1501tools/: FORCE
bf35182f 1502 $(Q)mkdir -p $(objtree)/tools
a50e4333 1503 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
ea01fa9f
BP
1504
1505tools/%: FORCE
bf35182f 1506 $(Q)mkdir -p $(objtree)/tools
a50e4333 1507 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
ea01fa9f 1508
06300b21
SR
1509# Single targets
1510# ---------------------------------------------------------------------------
bc2546a6 1511# Single targets are compatible with:
e1b8513d 1512# - build with mixed source and output
bc2546a6
SR
1513# - build with separate output dir 'make O=...'
1514# - external modules
1515#
1516# target-dir => where to store outputfile
1517# build-dir => directory in kernel source tree to use
1518
1519ifeq ($(KBUILD_EXTMOD),)
aa360879 1520 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1521 target-dir = $(dir $@)
1522else
1523 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1524 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1525 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1526endif
1527
f6ecebd6 1528%.s: %.c prepare scripts FORCE
bc2546a6 1529 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1530%.i: %.c prepare scripts FORCE
bc2546a6 1531 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1532%.o: %.c prepare scripts FORCE
bc2546a6 1533 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1534%.lst: %.c prepare scripts FORCE
bc2546a6 1535 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1536%.s: %.S prepare scripts FORCE
bc2546a6 1537 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1538%.o: %.S prepare scripts FORCE
bc2546a6 1539 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1540%.symtypes: %.c prepare scripts FORCE
1541 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1542
bc2546a6 1543# Modules
31110ebb
SR
1544/: prepare scripts FORCE
1545 $(cmd_crmodverdir)
1546 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1547 $(build)=$(build-dir)
8e2faea8
PF
1548# Make sure the latest headers are built for Documentation
1549Documentation/: headers_install
31110ebb 1550%/: prepare scripts FORCE
7bb9d092 1551 $(cmd_crmodverdir)
06300b21 1552 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1553 $(build)=$(build-dir)
1554%.ko: prepare scripts FORCE
7bb9d092 1555 $(cmd_crmodverdir)
06300b21 1556 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1557 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1558 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1559
38385f8f 1560# FIXME Should go into a make.lib or something
1da177e4
LT
1561# ===========================================================================
1562
1563quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1564 cmd_rmdirs = rm -rf $(rm-dirs)
1565
1566quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1567 cmd_rmfiles = rm -f $(rm-files)
1568
bc3c26fe 1569# Run depmod only if we have System.map and depmod is executable
50a8ec31 1570quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
569658dd 1571 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
b92021b0 1572 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
50a8ec31 1573
7bb9d092 1574# Create temporary dir for module support files
ab19f879
SR
1575# clean it up only when building all modules
1576cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1577 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1da177e4 1578
1da177e4
LT
1579# read all saved command lines
1580
1581targets := $(wildcard $(sort $(targets)))
1582cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1583
1584ifneq ($(cmd_files),)
1585 $(cmd_files): ; # Do not try to update included dependency files
1586 include $(cmd_files)
1587endif
1588
1da177e4
LT
1589endif # skip-makefile
1590
4f193362 1591PHONY += FORCE
1da177e4 1592FORCE:
4f193362 1593
4f193362 1594# Declare the contents of the .PHONY variable as phony. We keep that
fe8d0a41 1595# information in a variable so we can use it in if_changed and friends.
4f193362 1596.PHONY: $(PHONY)