Merge branch 'macb-next'
[linux-2.6-block.git] / Makefile
CommitLineData
b2441318 1# SPDX-License-Identifier: GPL-2.0
c517d838 2VERSION = 4
2bd6bf03 3PATCHLEVEL = 14
55922c9d 4SUBLEVEL = 0
39dae59d 5EXTRAVERSION = -rc8
566cf877 6NAME = Fearless Coyote
1da177e4
LT
7
8# *DOCUMENTATION*
9# To see a list of typical targets execute "make help"
10# More info can be located in ./README
11# Comments in this file are targeted only to the developer, do not
12# expect to learn how to build the kernel reading this file.
13
a436bb7b
MY
14# o Do not use make's built-in rules and variables
15# (this increases performance and avoids hard-to-debug behaviour);
16# o Look for make include files relative to root of kernel src
17MAKEFLAGS += -rR --include-dir=$(CURDIR)
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
6f0fa58e 88ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
066b7ed9 89 quiet=silent_
e572d088 90 tools_silent=s
066b7ed9 91endif
066b7ed9
MM
92
93export quiet Q KBUILD_VERBOSE
94
1da177e4
LT
95# kbuild supports saving output files in a separate directory.
96# To locate output files in a separate directory two syntaxes are supported.
97# In both cases the working directory must be the root of the kernel src.
98# 1) O=
99# Use "make O=dir/to/store/output/files/"
070b98bf 100#
1da177e4
LT
101# 2) Set KBUILD_OUTPUT
102# Set the environment variable KBUILD_OUTPUT to point to the directory
103# where the output files shall be placed.
104# export KBUILD_OUTPUT=dir/to/store/output/files/
105# make
106#
107# The O= assignment takes precedence over the KBUILD_OUTPUT environment
108# variable.
109
c4e6fff1
C
110# KBUILD_SRC is not intended to be used by the regular user (for now),
111# it is set on invocation of make with KBUILD_OUTPUT or O= specified.
1da177e4
LT
112ifeq ($(KBUILD_SRC),)
113
114# OK, Make called in directory where kernel src resides
115# Do we want to locate output files in a separate directory?
b8b0618c
CR
116ifeq ("$(origin O)", "command line")
117 KBUILD_OUTPUT := $(O)
1da177e4
LT
118endif
119
120# That's our default target when none is given on the command line
4f193362 121PHONY := _all
1da177e4
LT
122_all:
123
1cacc9ab
SR
124# Cancel implicit rules on top Makefile
125$(CURDIR)/Makefile Makefile: ;
126
51193b76
RJ
127ifneq ($(words $(subst :, ,$(CURDIR))), 1)
128 $(error main directory cannot contain spaces nor colons)
129endif
130
1da177e4 131ifneq ($(KBUILD_OUTPUT),)
1da177e4
LT
132# check that the output directory actually exists
133saved-output := $(KBUILD_OUTPUT)
028568d8
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 143
c4e6fff1 144# Invoke a second make in the output directory, passing relevant variables
2e8d696b 145sub-make:
745a2543 146 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
aa55c8e2 147 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
1da177e4
LT
148
149# Leave processing to above invocation of make
150skip-makefile := 1
151endif # ifneq ($(KBUILD_OUTPUT),)
152endif # ifeq ($(KBUILD_SRC),)
153
154# We process the rest of the Makefile if this is the final invocation of make
155ifeq ($(skip-makefile),)
156
7ff52571
MY
157# Do not print "Entering directory ...",
158# but we want to display it when entering to the output directory
159# so that IDEs/editors are able to understand relative filenames.
160MAKEFLAGS += --no-print-directory
161
aa55c8e2
MY
162# Call a source code checker (by default, "sparse") as part of the
163# C compilation.
164#
165# Use 'make C=1' to enable checking of only re-compiled files.
166# Use 'make C=2' to enable checking of *all* source files, regardless
167# of whether they are re-compiled or not.
168#
036db11c
C
169# See the file "Documentation/dev-tools/sparse.rst" for more details,
170# including where to get the "sparse" utility.
aa55c8e2
MY
171
172ifeq ("$(origin C)", "command line")
173 KBUILD_CHECKSRC = $(C)
174endif
175ifndef KBUILD_CHECKSRC
176 KBUILD_CHECKSRC = 0
177endif
178
179# Use make M=dir to specify directory of external module to build
180# Old syntax make ... SUBDIRS=$PWD is still supported
181# Setting the environment variable KBUILD_EXTMOD take precedence
182ifdef SUBDIRS
183 KBUILD_EXTMOD ?= $(SUBDIRS)
184endif
185
186ifeq ("$(origin M)", "command line")
187 KBUILD_EXTMOD := $(M)
188endif
189
1da177e4
LT
190# If building an external module we do not care about the all: rule
191# but instead _all depend on modules
4f193362 192PHONY += all
1da177e4
LT
193ifeq ($(KBUILD_EXTMOD),)
194_all: all
195else
196_all: modules
197endif
198
9da0763b
MM
199ifeq ($(KBUILD_SRC),)
200 # building in the source tree
201 srctree := .
202else
203 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
204 # building in a subdirectory of the source tree
205 srctree := ..
206 else
207 srctree := $(KBUILD_SRC)
208 endif
209endif
7e1c0477 210objtree := .
1da177e4
LT
211src := $(srctree)
212obj := $(objtree)
213
0f558c33 214VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
1da177e4 215
11294235 216export srctree objtree VPATH
1da177e4 217
1da177e4
LT
218# SUBARCH tells the usermode build what the underlying arch is. That is set
219# first, and if a usermode build is happening, the "ARCH=um" on the command
220# line overrides the setting of ARCH below. If a native build is happening,
38385f8f 221# then ARCH is assigned, getting whatever value it gets normally, and
1da177e4
LT
222# SUBARCH is subsequently ignored.
223
ffee0de4
DW
224SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
225 -e s/sun4u/sparc64/ \
1da177e4 226 -e s/arm.*/arm/ -e s/sa110/arm/ \
39990b5e 227 -e s/s390x/s390/ -e s/parisc64/parisc/ \
236b1957 228 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
f1b99392 229 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ )
1da177e4
LT
230
231# Cross compiling and selecting different set of gcc/bin-utils
232# ---------------------------------------------------------------------------
233#
234# When performing cross compilation for other architectures ARCH shall be set
235# to the target architecture. (See arch/* for the possibilities).
236# ARCH can be set during invocation of make:
237# make ARCH=ia64
238# Another way is to have ARCH set in the environment.
239# The default ARCH is the host where make is executed.
240
241# CROSS_COMPILE specify the prefix used for all executables used
242# during compilation. Only gcc and related bin-utils executables
243# are prefixed with $(CROSS_COMPILE).
244# CROSS_COMPILE can be set on the command line
245# make CROSS_COMPILE=ia64-linux-
246# Alternatively CROSS_COMPILE can be set in the environment.
84336466
RM
247# A third alternative is to store a setting in .config so that plain
248# "make" in the configured kernel build directory always uses that.
1da177e4
LT
249# Default value for CROSS_COMPILE is not to prefix executables
250# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
2331d1a6 251ARCH ?= $(SUBARCH)
84336466 252CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
1da177e4
LT
253
254# Architecture as present in compile.h
6752ed90
TG
255UTS_MACHINE := $(ARCH)
256SRCARCH := $(ARCH)
1da177e4 257
d746d647
SR
258# Additional ARCH settings for x86
259ifeq ($(ARCH),i386)
260 SRCARCH := x86
261endif
262ifeq ($(ARCH),x86_64)
263 SRCARCH := x86
264endif
74b469f2 265
5e538790 266# Additional ARCH settings for sparc
e69f58c0
NK
267ifeq ($(ARCH),sparc32)
268 SRCARCH := sparc
269endif
a439fe51 270ifeq ($(ARCH),sparc64)
5e538790 271 SRCARCH := sparc
a439fe51 272endif
2fb9b1bd 273
3cc000b5
PM
274# Additional ARCH settings for sh
275ifeq ($(ARCH),sh64)
276 SRCARCH := sh
277endif
278
18aecc2b 279# Additional ARCH settings for tile
6738d321
CM
280ifeq ($(ARCH),tilepro)
281 SRCARCH := tile
282endif
18aecc2b
CM
283ifeq ($(ARCH),tilegx)
284 SRCARCH := tile
285endif
286
5e538790
SR
287# Where to locate arch specific headers
288hdr-arch := $(SRCARCH)
289
14cdd3c4 290KCONFIG_CONFIG ?= .config
41263fc6 291export KCONFIG_CONFIG
14cdd3c4 292
1da177e4
LT
293# SHELL used by kbuild
294CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
295 else if [ -x /bin/bash ]; then echo /bin/bash; \
296 else echo sh; fi ; fi)
297
d7f14c66
UKK
298HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS)
299HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS)
300HOST_LFS_LIBS := $(shell getconf LFS_LIBS)
301
070b98bf
SR
302HOSTCC = gcc
303HOSTCXX = g++
d7f14c66
UKK
304HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
305 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
306HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
307HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
308HOST_LOADLIBES := $(HOST_LFS_LIBS)
1da177e4 309
61163efa
BW
310ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
311HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \
312 -Wno-missing-field-initializers -fno-delete-null-pointer-checks
313endif
314
070b98bf
SR
315# Decide whether to build built-in, modular, or both.
316# Normally, just do built-in.
1da177e4
LT
317
318KBUILD_MODULES :=
319KBUILD_BUILTIN := 1
320
3fbb43df
MY
321# If we have only "make modules", don't compile built-in objects.
322# When we're building modules with modversions, we need to consider
323# the built-in objects during the descend as well, in order to
324# make sure the checksums are up to date before we record them.
1da177e4
LT
325
326ifeq ($(MAKECMDGOALS),modules)
327 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
328endif
329
3fbb43df
MY
330# If we have "make <whatever> modules", compile modules
331# in addition to whatever we do anyway.
332# Just "make" or "make all" shall build modules as well
1da177e4
LT
333
334ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
335 KBUILD_MODULES := 1
336endif
337
338ifeq ($(MAKECMDGOALS),)
339 KBUILD_MODULES := 1
340endif
341
e579d351 342export KBUILD_MODULES KBUILD_BUILTIN
1da177e4
LT
343export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
344
1cacc9ab 345# We need some generic definitions (do not try to remake the file).
a436bb7b
MY
346scripts/Kbuild.include: ;
347include scripts/Kbuild.include
1da177e4
LT
348
349# Make variables (CC, etc...)
1da177e4
LT
350AS = $(CROSS_COMPILE)as
351LD = $(CROSS_COMPILE)ld
352CC = $(CROSS_COMPILE)gcc
353CPP = $(CC) -E
354AR = $(CROSS_COMPILE)ar
355NM = $(CROSS_COMPILE)nm
356STRIP = $(CROSS_COMPILE)strip
357OBJCOPY = $(CROSS_COMPILE)objcopy
358OBJDUMP = $(CROSS_COMPILE)objdump
359AWK = awk
360GENKSYMS = scripts/genksyms/genksyms
caa27b66 361INSTALLKERNEL := installkernel
1da177e4 362DEPMOD = /sbin/depmod
1da177e4 363PERL = perl
011bf125 364PYTHON = python
1da177e4
LT
365CHECK = sparse
366
80a7d1d9
HE
367CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
368 -Wbitwise -Wno-return-void $(CF)
b36fad65 369NOSTDINC_FLAGS =
6588169d
SR
370CFLAGS_MODULE =
371AFLAGS_MODULE =
372LDFLAGS_MODULE =
1da177e4
LT
373CFLAGS_KERNEL =
374AFLAGS_KERNEL =
b36fad65 375LDFLAGS_vmlinux =
b334e19a 376CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
543c37cb 377CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,)
1da177e4
LT
378
379
abbf1590
DH
380# Use USERINCLUDE when you must reference the UAPI directories only.
381USERINCLUDE := \
382 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
3308b285 383 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
abbf1590 384 -I$(srctree)/include/uapi \
3308b285 385 -I$(objtree)/include/generated/uapi \
abbf1590
DH
386 -include $(srctree)/include/linux/kconfig.h
387
1da177e4
LT
388# Use LINUXINCLUDE when you must reference the include/ directory.
389# Needed to be compatible with the O= option
abbf1590
DH
390LINUXINCLUDE := \
391 -I$(srctree)/arch/$(hdr-arch)/include \
3308b285 392 -I$(objtree)/arch/$(hdr-arch)/include/generated \
abbf1590 393 $(if $(KBUILD_SRC), -I$(srctree)/include) \
f8224f7f
MY
394 -I$(objtree)/include \
395 $(USERINCLUDE)
1da177e4 396
d8672b40 397KBUILD_CPPFLAGS := -D__KERNEL__
1da177e4 398
a0f97e06 399KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
8c97023c 400 -fno-strict-aliasing -fno-common -fshort-wchar \
a8735821 401 -Werror-implicit-function-declaration \
51b97e35 402 -Wno-format-security \
c6a38553
BP
403 -std=gnu89 $(call cc-option,-fno-PIE)
404
a1c48bb1 405
80c00ba9
SR
406KBUILD_AFLAGS_KERNEL :=
407KBUILD_CFLAGS_KERNEL :=
c6a38553 408KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
6588169d
SR
409KBUILD_AFLAGS_MODULE := -DMODULE
410KBUILD_CFLAGS_MODULE := -DMODULE
411KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
1da177e4 412
f1d28fb0
RZ
413# Read KERNELRELEASE from include/config/kernel.release (if it exists)
414KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
cacd54ef 415KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
cb58455c 416
070b98bf 417export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
80ef88d6 418export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
d7f14c66 419export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
011bf125 420export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
070b98bf 421export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
1da177e4 422
06c5040c 423export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
5c9a8750 424export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN
222d394d 425export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
6588169d 426export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
80c00ba9 427export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
40df759e 428export KBUILD_ARFLAGS
1da177e4
LT
429
430# When compiling out-of-tree modules, put MODVERDIR in the module
431# tree rather than in the kernel tree. The kernel tree might
432# even be read-only.
433export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
434
1da177e4
LT
435# Files to ignore in find ... statements
436
ae63b2d7
PB
437export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
438 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
439 -prune -o
450c6076
JJ
440export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
441 --exclude CVS --exclude .pc --exclude .hg --exclude .git
1da177e4
LT
442
443# ===========================================================================
444# Rules shared between *config targets and build targets
445
312a3d09 446# Basic helpers built in scripts/basic/
4f193362 447PHONY += scripts_basic
1da177e4
LT
448scripts_basic:
449 $(Q)$(MAKE) $(build)=scripts/basic
638adb05 450 $(Q)rm -f .tmp_quiet_recordmcount
1da177e4 451
cd05e6bd
JB
452# To avoid any implicit rule to kick in, define an empty command.
453scripts/basic/%: scripts_basic ;
454
4f193362 455PHONY += outputmakefile
fd5f0cd6
JB
456# outputmakefile generates a Makefile in the output directory, if using a
457# separate output directory. This allows convenient use of make in the
458# output directory.
1da177e4 459outputmakefile:
fd5f0cd6 460ifneq ($(KBUILD_SRC),)
92979997 461 $(Q)ln -fsn $(srctree) source
fd5f0cd6
JB
462 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
463 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
464endif
1da177e4 465
d8ecc5cd 466# Support for using generic headers in asm-generic
a9d9a400
MY
467PHONY += asm-generic uapi-asm-generic
468asm-generic: uapi-asm-generic
d8ecc5cd 469 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
3c5994c8 470 src=asm obj=arch/$(SRCARCH)/include/generated/asm
a9d9a400 471uapi-asm-generic:
3c5994c8
CM
472 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
473 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
d8ecc5cd 474
1da177e4
LT
475# To make sure we do not include .config for any of the *config targets
476# catch them early, and hand them over to scripts/kconfig/Makefile
477# It is allowed to specify more targets when calling make, including
478# mixing *config targets and build targets.
070b98bf 479# For example 'make oldconfig all'.
1da177e4
LT
480# Detect when mixed targets is specified, and make a second invocation
481# of make so .config is not included in this case either (for *config).
482
10b63956 483version_h := include/generated/uapi/linux/version.h
223c24a7 484old_version_h := include/linux/version.h
d183e6f5 485
3eb3c740 486no-dot-config-targets := clean mrproper distclean \
fbae4d58 487 cscope gtags TAGS tags help% %docs check% coccicheck \
d183e6f5 488 $(version_h) headers_% archheaders archscripts \
4aed2fd8 489 kernelversion %src-pkg
1da177e4
LT
490
491config-targets := 0
492mixed-targets := 0
493dot-config := 1
494
495ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
496 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
497 dot-config := 0
498 endif
499endif
500
501ifeq ($(KBUILD_EXTMOD),)
502 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
503 config-targets := 1
d0d38cd9 504 ifneq ($(words $(MAKECMDGOALS)),1)
1da177e4
LT
505 mixed-targets := 1
506 endif
507 endif
508endif
312a3d09 509# install and modules_install need also be processed one by one
a85a41ed
MM
510ifneq ($(filter install,$(MAKECMDGOALS)),)
511 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
512 mixed-targets := 1
513 endif
514endif
1da177e4
LT
515
516ifeq ($(mixed-targets),1)
517# ===========================================================================
518# We're called with mixed targets (*config and build targets).
519# Handle them one by one.
520
9319f453
MY
521PHONY += $(MAKECMDGOALS) __build_one_by_one
522
523$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
524 @:
525
526__build_one_by_one:
527 $(Q)set -e; \
528 for i in $(MAKECMDGOALS); do \
529 $(MAKE) -f $(srctree)/Makefile $$i; \
530 done
1da177e4
LT
531
532else
533ifeq ($(config-targets),1)
534# ===========================================================================
535# *config targets only - make sure prerequisites are updated, and descend
536# in scripts/kconfig to make the *config target
537
538# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
539# KBUILD_DEFCONFIG may point out an alternative default configuration
540# used for 'make defconfig'
a436bb7b 541include arch/$(SRCARCH)/Makefile
61bee204 542export KBUILD_DEFCONFIG KBUILD_KCONFIG
1da177e4 543
31110ebb 544config: scripts_basic outputmakefile FORCE
31110ebb
SR
545 $(Q)$(MAKE) $(build)=scripts/kconfig $@
546
547%config: scripts_basic outputmakefile FORCE
1da177e4
LT
548 $(Q)$(MAKE) $(build)=scripts/kconfig $@
549
550else
551# ===========================================================================
552# Build targets only - this includes vmlinux, arch specific targets, clean
553# targets and others. In general all targets except *config targets.
554
555ifeq ($(KBUILD_EXTMOD),)
556# Additional helpers built in scripts/
557# Carefully list dependencies so we do not try to build scripts twice
070b98bf 558# in parallel
4f193362 559PHONY += scripts
a54292f5 560scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
6b90bd4b 561 asm-generic gcc-plugins
1da177e4
LT
562 $(Q)$(MAKE) $(build)=$(@)
563
1da177e4
LT
564# Objects we will link into vmlinux / subdirs we need to visit
565init-y := init/
df85b2d7 566drivers-y := drivers/ sound/ firmware/
1da177e4
LT
567net-y := net/
568libs-y := lib/
569core-y := usr/
37d9fe47 570virt-y := virt/
1da177e4
LT
571endif # KBUILD_EXTMOD
572
573ifeq ($(dot-config),1)
9ee4e336
SR
574# Read in config
575-include include/config/auto.conf
1da177e4 576
9ee4e336 577ifeq ($(KBUILD_EXTMOD),)
1da177e4
LT
578# Read in dependencies to all Kconfig* files, make sure to run
579# oldconfig if changes are detected.
c955ccaf 580-include include/config/auto.conf.cmd
1da177e4 581
1da177e4 582# To avoid any implicit rule to kick in, define an empty command
14cdd3c4 583$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
1da177e4 584
c955ccaf 585# If .config is newer than include/config/auto.conf, someone tinkered
752625cf 586# with it and forgot to run make oldconfig.
070b98bf 587# if auto.conf.cmd is missing then we are probably in a cleaned tree so
752625cf 588# we execute the config step to be sure to catch updated Kconfig files
bc081dd6 589include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
1da177e4 590 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
3041e47e 591else
264a2683 592# external modules needs include/generated/autoconf.h and include/config/auto.conf
9ee4e336
SR
593# but do not care if they are up-to-date. Use auto.conf to trigger the test
594PHONY += include/config/auto.conf
595
596include/config/auto.conf:
264a2683 597 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
5369f550
MM
598 echo >&2; \
599 echo >&2 " ERROR: Kernel configuration is invalid."; \
600 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
601 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
602 echo >&2 ; \
9ee4e336
SR
603 /bin/false)
604
605endif # KBUILD_EXTMOD
c955ccaf 606
1da177e4
LT
607else
608# Dummy target needed, because used as prerequisite
c955ccaf 609include/config/auto.conf: ;
9ee4e336 610endif # $(dot-config)
1da177e4 611
86556392
NP
612# For the kernel to actually contain only the needed exported symbols,
613# we have to build modules as well to determine what those symbols are.
614# (this can be evaluated only once include/config/auto.conf has been included)
615ifdef CONFIG_TRIM_UNUSED_KSYMS
616 KBUILD_MODULES := 1
617endif
618
1da177e4
LT
619# The all: target is the default when no target is given on the
620# command line.
621# This allow a user to issue only 'make' to build a kernel including modules
c8447161 622# Defaults to vmlinux, but the arch makefile usually adds further targets
1da177e4
LT
623all: vmlinux
624
6dd3f13e
MM
625# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
626# values of the respective KBUILD_* variables
627ARCH_CPPFLAGS :=
628ARCH_AFLAGS :=
629ARCH_CFLAGS :=
a436bb7b 630include arch/$(SRCARCH)/Makefile
a1c48bb1
GU
631
632KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
ef6000b4 633KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
bd664f6b
LT
634KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
635KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
636KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
a1c48bb1 637
1da177e4 638ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
6748cb3c
BW
639KBUILD_CFLAGS += $(call cc-option,-Oz,-Os)
640KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
1da177e4 641else
815eb71e 642ifdef CONFIG_PROFILE_ALL_BRANCHES
a76bcf55 643KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
815eb71e
AB
644else
645KBUILD_CFLAGS += -O2
646endif
1da177e4
LT
647endif
648
a76bcf55
AB
649KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
650 $(call cc-disable-warning,maybe-uninitialized,))
651
69102311
JK
652# Tell gcc to never replace conditional load with a non-conditional one
653KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
654
7292ae3d
GFM
655# check for 'asm goto'
656ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
657 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
658 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
659endif
660
6b90bd4b
ER
661include scripts/Makefile.gcc-plugins
662
1873e870
AK
663ifdef CONFIG_READABLE_ASM
664# Disable optimizations that make assembler listings hard to read.
665# reorder blocks reorders the control in the function
666# ipa clone creates specialized cloned functions
667# partial inlining inlines only parts of functions
668KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
669 $(call cc-option,-fno-ipa-cp-clone,) \
670 $(call cc-option,-fno-partial-inlining)
671endif
672
08f67461 673ifneq ($(CONFIG_FRAME_WARN),0)
35bb5b1e
AK
674KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
675endif
676
c965b105
KC
677# This selects the stack protector compiler flag. Testing it is delayed
678# until after .config has been reprocessed, in the prepare-compiler-check
679# target.
8779657d 680ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
19952a92 681 stackp-flag := -fstack-protector
c965b105 682 stackp-name := REGULAR
6c15b327
JB
683else
684ifdef CONFIG_CC_STACKPROTECTOR_STRONG
8779657d 685 stackp-flag := -fstack-protector-strong
c965b105 686 stackp-name := STRONG
19952a92
KC
687else
688 # Force off for distro compilers that enable stack protector by default.
689 stackp-flag := $(call cc-option, -fno-stack-protector)
5d707e9c 690endif
6c15b327 691endif
c965b105
KC
692# Find arch-specific stack protector compiler sanity-checking script.
693ifdef CONFIG_CC_STACKPROTECTOR
228d96c6
KC
694 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
695 stackp-check := $(wildcard $(stackp-path))
c965b105 696endif
19952a92 697KBUILD_CFLAGS += $(stackp-flag)
e06b8b98 698
5631d9c4 699ifeq ($(cc-name),clang)
785f11aa 700ifneq ($(CROSS_COMPILE),)
bb3f38c3 701CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%))
785f11aa
BW
702GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..)
703endif
704ifneq ($(GCC_TOOLCHAIN),)
bb3f38c3 705CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN)
785f11aa
BW
706endif
707KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
708KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
61163efa 709KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
61163efa
BW
710KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
711KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
712KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
bfb38988 713KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
61163efa
BW
714# Quiet clang warning: comparison of unsigned expression < 0 is always false
715KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
716# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
717# source of a reference will be _MergedGlobals and not on of the whitelisted names.
718# See modpost pattern 2
719KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
26ea6bb1 720KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
a37c45cd
MD
721KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
722KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
61163efa
BW
723else
724
c9c6837d 725# These warnings generated too much noise in a regular build.
35288e30 726# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
8417da6f 727KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
c9c6837d 728KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
61163efa 729endif
af0e5d56 730
1da177e4 731ifdef CONFIG_FRAME_POINTER
a0f97e06 732KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
1da177e4 733else
7e9501fd
RV
734# Some targets (ARM with Thumb2, for example), can't be built with frame
735# pointers. For those, we don't have FUNCTION_TRACER automatically
736# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
737# incompatible with -fomit-frame-pointer with current GCC, so we don't use
738# -fomit-frame-pointer with FUNCTION_TRACER.
739ifndef CONFIG_FUNCTION_TRACER
a0f97e06 740KBUILD_CFLAGS += -fomit-frame-pointer
1da177e4 741endif
7e9501fd 742endif
1da177e4 743
2062afb4
LT
744KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
745
1da177e4 746ifdef CONFIG_DEBUG_INFO
866ced95
AK
747ifdef CONFIG_DEBUG_INFO_SPLIT
748KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
749else
a0f97e06 750KBUILD_CFLAGS += -g
866ced95 751endif
2288328c 752KBUILD_AFLAGS += -Wa,-gdwarf-2
1da177e4 753endif
bfaf2dd3
AK
754ifdef CONFIG_DEBUG_INFO_DWARF4
755KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
756endif
1da177e4 757
d6f4ceb7 758ifdef CONFIG_DEBUG_INFO_REDUCED
e82c4bb8
AK
759KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
760 $(call cc-option,-fno-var-tracking)
d6f4ceb7
AK
761endif
762
606576ce 763ifdef CONFIG_FUNCTION_TRACER
c0a80c0c
HC
764ifndef CC_FLAGS_FTRACE
765CC_FLAGS_FTRACE := -pg
766endif
767export CC_FLAGS_FTRACE
a2546fae
SR
768ifdef CONFIG_HAVE_FENTRY
769CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
770endif
c0a80c0c 771KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
a2546fae 772KBUILD_AFLAGS += $(CC_USING_FENTRY)
72441cb1 773ifdef CONFIG_DYNAMIC_FTRACE
cf4db259 774 ifdef CONFIG_HAVE_C_RECORDMCOUNT
72441cb1
SR
775 BUILD_C_RECORDMCOUNT := y
776 export BUILD_C_RECORDMCOUNT
777 endif
778endif
16444a8a
ACM
779endif
780
91341d4b
SR
781# We trigger additional mismatches with less inlining
782ifdef CONFIG_DEBUG_SECTION_MISMATCH
783KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
784endif
785
90ad4052
MY
786ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
787KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,)
788KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
789endif
790
e8e69931 791# arch Makefile may override CC so keep this after arch Makefile is included
e8f5bdb0 792NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
e8e69931
SR
793CHECKFLAGS += $(NOSTDINC_FLAGS)
794
1da177e4 795# warn about C99 declaration after statement
a0f97e06 796KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
1da177e4 797
070b98bf 798# disable pointer signed / unsigned warnings in gcc 4.0
8417da6f 799KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
1da177e4 800
fe8d0a41 801# disable invalid "can't wrap" optimizations for signed / pointers
a137802e 802KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
d0115552 803
8f7f5c9f
AK
804# conserve stack if available
805KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
806
80970472
ST
807# disallow errors like 'EXPORT_GPL(foo);' with missing header
808KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
809
810# require functions to have arguments in prototypes, not empty 'int foo()'
811KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
812
fe7c36c7
JT
813# Prohibit date/time macros, which would make the build non-deterministic
814KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
815
ea8daa7b
DW
816# enforce correct pointer usage
817KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
818
c834f0e8
KC
819# Require designated initializers for all marked structures
820KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
821
40df759e
MM
822# use the deterministic mode of AR if available
823KBUILD_ARFLAGS := $(call ar-option,D)
824
a436bb7b
MY
825include scripts/Makefile.kasan
826include scripts/Makefile.extrawarn
c6d30853 827include scripts/Makefile.ubsan
a86fe353 828
61754c18
MM
829# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
830# last assignments
831KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
832KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
833KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
52bcc330 834
18991197 835# Use --build-id when available.
bd74370b 836LDFLAGS_BUILD_ID := $(patsubst -Wl$(comma)%,%,\
f86fd306 837 $(call cc-ldoption, -Wl$(comma)--build-id,))
6588169d 838KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
18991197
RM
839LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
840
b67067f1
NP
841ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
842LDFLAGS_vmlinux += $(call ld-option, --gc-sections,)
843endif
844
5d7d18f5 845ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
d79a2719 846LDFLAGS_vmlinux += $(call ld-option, -X,)
5d7d18f5
DH
847endif
848
1da177e4 849# Default kernel image to build when no specific target is given.
070b98bf 850# KBUILD_IMAGE may be overruled on the command line or
1da177e4
LT
851# set in the environment
852# Also any assignments in arch/$(ARCH)/Makefile take precedence over
853# this default value
854export KBUILD_IMAGE ?= vmlinux
855
856#
857# INSTALL_PATH specifies where to place the updated kernel and system map
858# images. Default is /boot, but you can set it to other values
859export INSTALL_PATH ?= /boot
860
f4d4ffc0
JC
861#
862# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
863# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
864# an argument if needed. Otherwise it defaults to the kernel install path
865#
866export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
867
1da177e4
LT
868#
869# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
870# relocations required by build roots. This is not defined in the
070b98bf 871# makefile but the argument can be passed to make if needed.
1da177e4
LT
872#
873
df9df036 874MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1da177e4
LT
875export MODLIB
876
ac031f26 877#
3fbb43df
MY
878# INSTALL_MOD_STRIP, if defined, will cause modules to be
879# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
880# the default option --strip-debug will be used. Otherwise,
881# INSTALL_MOD_STRIP value will be used as the options to the strip command.
2ea03891 882
ac031f26
TT
883ifdef INSTALL_MOD_STRIP
884ifeq ($(INSTALL_MOD_STRIP),1)
2ea03891 885mod_strip_cmd = $(STRIP) --strip-debug
ac031f26 886else
2ea03891 887mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
ac031f26
TT
888endif # INSTALL_MOD_STRIP=1
889else
2ea03891 890mod_strip_cmd = true
ac031f26
TT
891endif # INSTALL_MOD_STRIP
892export mod_strip_cmd
893
beb50df3
BJ
894# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
895# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
896# or CONFIG_MODULE_COMPRESS_XZ.
897
898mod_compress_cmd = true
899ifdef CONFIG_MODULE_COMPRESS
900 ifdef CONFIG_MODULE_COMPRESS_GZIP
3d1450d5 901 mod_compress_cmd = gzip -n -f
beb50df3
BJ
902 endif # CONFIG_MODULE_COMPRESS_GZIP
903 ifdef CONFIG_MODULE_COMPRESS_XZ
3d1450d5 904 mod_compress_cmd = xz -f
beb50df3
BJ
905 endif # CONFIG_MODULE_COMPRESS_XZ
906endif # CONFIG_MODULE_COMPRESS
907export mod_compress_cmd
908
1bf49dd4 909# Select initial ramdisk compression format, default is gzip(1).
910# This shall be used by the dracut(8) tool while creating an initramfs image.
911#
7ac18156
JB
912INITRD_COMPRESS-y := gzip
913INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
914INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
915INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
916INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
917INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
b7000ade
LT
918# do not export INITRD_COMPRESS, since we didn't actually
919# choose a sane default compression above.
920# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
1da177e4 921
d9d8d7ed 922ifdef CONFIG_MODULE_SIG_ALL
3ee550f1
DW
923$(eval $(call config_filename,MODULE_SIG_KEY))
924
925mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
e2a666d5
RR
926else
927mod_sign_cmd = true
928endif
929export mod_sign_cmd
930
9f0c18ae
JP
931ifdef CONFIG_STACK_VALIDATION
932 has_libelf := $(call try-run,\
933 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
934 ifeq ($(has_libelf),1)
935 objtool_target := tools/objtool FORCE
936 else
3dd40cb3
JP
937 ifdef CONFIG_ORC_UNWINDER
938 $(error "Cannot generate ORC metadata for CONFIG_ORC_UNWINDER=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
939 else
940 $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
941 endif
9f0c18ae
JP
942 SKIP_STACK_VALIDATION := 1
943 export SKIP_STACK_VALIDATION
944 endif
945endif
946
e2a666d5 947
1da177e4 948ifeq ($(KBUILD_EXTMOD),)
cfc411e7 949core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1da177e4
LT
950
951vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
952 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
37d9fe47 953 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
1da177e4
LT
954
955vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
37d9fe47 956 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
1da177e4
LT
957
958init-y := $(patsubst %/, %/built-in.o, $(init-y))
959core-y := $(patsubst %/, %/built-in.o, $(core-y))
960drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
961net-y := $(patsubst %/, %/built-in.o, $(net-y))
962libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
3a166fc2 963libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y)))
37d9fe47 964virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
1da177e4 965
1f2bfbd0 966# Externally visible symbols (used by link-vmlinux.sh)
95698570 967export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
3a166fc2
NP
968export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
969export KBUILD_VMLINUX_LIBS := $(libs-y1)
95698570 970export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1f2bfbd0 971export LDFLAGS_vmlinux
312a3d09 972# used by scripts/package/Makefile
37d9fe47 973export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
9bb48247 974
3a166fc2 975vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
1da177e4 976
2441e78b
NP
977# Include targets which we want to execute sequentially if the rest of the
978# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
979# evaluated more than once.
980PHONY += vmlinux_prereq
981vmlinux_prereq: $(vmlinux-deps) FORCE
0f836e5f 982ifdef CONFIG_HEADERS_CHECK
0e7af8d0 983 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
267c4025 984endif
3ee7b3fa 985ifdef CONFIG_GDB_SCRIPTS
8e9b4667 986 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
0f836e5f 987endif
2441e78b 988ifdef CONFIG_TRIM_UNUSED_KSYMS
ba79d401 989 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
86556392 990 "$(MAKE) -f $(srctree)/Makefile vmlinux"
2441e78b 991endif
23121ca2
NP
992
993# standalone target for easier testing
994include/generated/autoksyms.h: FORCE
ba79d401 995 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
23121ca2 996
fbe6e37d
NP
997ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
998
999# Final link of vmlinux with optional arch pass after final link
312a3d09
C
1000cmd_link-vmlinux = \
1001 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \
fbe6e37d 1002 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
2441e78b 1003
edf69470 1004vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
1f2bfbd0 1005 +$(call if_changed,link-vmlinux)
741f98fe 1006
dd92478a
NP
1007# Build samples along the rest of the kernel
1008ifdef CONFIG_SAMPLES
1009vmlinux-dirs += samples
1010endif
1011
38385f8f 1012# The actual objects are generated when descending,
1da177e4 1013# make sure no implicit rule kicks in
1f2bfbd0 1014$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1da177e4
LT
1015
1016# Handle descending into subdirectories listed in $(vmlinux-dirs)
1017# Preset locale variables to speed up the build process. Limit locale
1018# tweaks to this spot to avoid wrong language settings when running
1019# make menuconfig etc.
1020# Error messages still appears in the original language
1021
4f193362 1022PHONY += $(vmlinux-dirs)
5bb78269 1023$(vmlinux-dirs): prepare scripts
1da177e4
LT
1024 $(Q)$(MAKE) $(build)=$@
1025
0d0e7718
MM
1026define filechk_kernel.release
1027 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1028endef
1029
83a35e36 1030# Store (new) KERNELRELEASE string in include/config/kernel.release
f1d28fb0 1031include/config/kernel.release: include/config/auto.conf FORCE
0d0e7718 1032 $(call filechk,kernel.release)
cb58455c
SR
1033
1034
1da177e4 1035# Things we need to do before we recursively start building the kernel
5bb78269
SR
1036# or the modules are listed in "prepare".
1037# A multi level approach is used. prepareN is processed before prepareN-1.
1038# archprepare is used in arch Makefiles and when processed asm symlink,
1039# version.h and scripts_basic is processed / created.
1da177e4 1040
5bb78269 1041# Listed in dependency order
4f193362 1042PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
5bb78269 1043
86feeaa8 1044# prepare3 is used to check if we are building in a separate output directory,
1da177e4
LT
1045# and if so do:
1046# 1) Check that make has not been executed in the kernel src $(srctree)
f1d28fb0 1047prepare3: include/config/kernel.release
1da177e4 1048ifneq ($(KBUILD_SRC),)
fd54f502 1049 @$(kecho) ' Using $(srctree) as source for kernel'
c955ccaf 1050 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
5369f550
MM
1051 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
1052 echo >&2 " in the '$(srctree)' directory.";\
1da177e4
LT
1053 /bin/false; \
1054 fi;
1da177e4
LT
1055endif
1056
c965b105
KC
1057# prepare2 creates a makefile if using a separate output directory.
1058# From this point forward, .config has been reprocessed, so any rules
1059# that need to depend on updated CONFIG_* values can be checked here.
1060prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
1da177e4 1061
d183e6f5 1062prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
f7f16b77 1063 include/config/auto.conf
7bb9d092 1064 $(cmd_crmodverdir)
1da177e4 1065
6520fe55 1066archprepare: archheaders archscripts prepare1 scripts_basic
5bb78269 1067
6b90bd4b 1068prepare0: archprepare gcc-plugins
8d36a623 1069 $(Q)$(MAKE) $(build)=.
86feeaa8 1070
1da177e4 1071# All the preparing..
b9ab5ebb
JP
1072prepare: prepare0 prepare-objtool
1073
1074PHONY += prepare-objtool
3b27a0c8 1075prepare-objtool: $(objtool_target)
1da177e4 1076
c965b105
KC
1077# Check for CONFIG flags that require compiler support. Abort the build
1078# after .config has been processed, but before the kernel build starts.
1079#
1080# For security-sensitive CONFIG options, we don't want to fallback and/or
1081# silently change which compiler flags will be used, since that leads to
1082# producing kernels with different security feature characteristics
1083# depending on the compiler used. (For example, "But I selected
1084# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
1085PHONY += prepare-compiler-check
1086prepare-compiler-check: FORCE
1087# Make sure compiler supports requested stack protector flag.
1088ifdef stackp-name
1089 ifeq ($(call cc-option, $(stackp-flag)),)
1090 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1091 $(stackp-flag) not supported by compiler >&2 && exit 1
1092 endif
1093endif
1094# Make sure compiler does not have buggy stack-protector support.
1095ifdef stackp-check
1096 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
1097 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1098 $(stackp-flag) available but compiler is broken >&2 && exit 1
1099 endif
1100endif
1101 @:
1102
1da177e4
LT
1103# Generate some files
1104# ---------------------------------------------------------------------------
1105
1106# KERNELRELEASE can change from a few different places, meaning version.h
1107# needs to be updated, so this check is forced on all builds
1108
1109uts_len := 64
63104eec
SR
1110define filechk_utsrelease.h
1111 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1112 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1113 exit 1; \
1114 fi; \
1115 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1116endef
1da177e4
LT
1117
1118define filechk_version.h
450c6076
JJ
1119 (echo \#define LINUX_VERSION_CODE $(shell \
1120 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
63104eec 1121 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1da177e4
LT
1122endef
1123
d183e6f5 1124$(version_h): $(srctree)/Makefile FORCE
1da177e4 1125 $(call filechk,version.h)
223c24a7 1126 $(Q)rm -f $(old_version_h)
1da177e4 1127
273b281f 1128include/generated/utsrelease.h: include/config/kernel.release FORCE
63104eec
SR
1129 $(call filechk,utsrelease.h)
1130
179efcb4
VN
1131PHONY += headerdep
1132headerdep:
9663d989
PF
1133 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1134 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
179efcb4 1135
8d730cfb
DW
1136# ---------------------------------------------------------------------------
1137# Kernel headers
8d730cfb 1138
e6883b18
SR
1139#Default location for installed headers
1140export INSTALL_HDR_PATH = $(objtree)/usr
6d716275 1141
0f042eea 1142# If we do an all arch process set dst to include/arch-$(hdr-arch)
61562f98 1143hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(hdr-arch), dst=include)
e6883b18 1144
052ad274
PA
1145PHONY += archheaders
1146archheaders:
1147
6520fe55
PA
1148PHONY += archscripts
1149archscripts:
1150
e6883b18 1151PHONY += __headers
a9d9a400 1152__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
e1b702cf 1153 $(Q)$(MAKE) $(build)=scripts build_unifdef
e6883b18
SR
1154
1155PHONY += headers_install_all
2fb9b1bd
SR
1156headers_install_all:
1157 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
6d716275 1158
8d730cfb 1159PHONY += headers_install
e6883b18 1160headers_install: __headers
10b63956
DH
1161 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
1162 $(error Headers not exportable for the $(SRCARCH) architecture))
a8ff49a1 1163 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
61562f98 1164 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst)
8d730cfb 1165
1f85712e
MF
1166PHONY += headers_check_all
1167headers_check_all: headers_install_all
2fb9b1bd 1168 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1f85712e 1169
68475359
DW
1170PHONY += headers_check
1171headers_check: headers_install
a8ff49a1 1172 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
05d8cba4 1173 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi $(hdr-dst) HDRCHECK=1
68475359 1174
5a5da78b
SK
1175# ---------------------------------------------------------------------------
1176# Kernel selftest
1177
1178PHONY += kselftest
1179kselftest:
2bc84526 1180 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
5a5da78b 1181
801d2e9f 1182PHONY += kselftest-clean
dcb825a9 1183kselftest-clean:
2bc84526 1184 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
dcb825a9 1185
3d6dee7a
BJZ
1186PHONY += kselftest-merge
1187kselftest-merge:
1188 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1189 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1190 -m $(objtree)/.config \
1191 $(srctree)/tools/testing/selftests/*/config
1192 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1193
1da177e4
LT
1194# ---------------------------------------------------------------------------
1195# Modules
1196
1197ifdef CONFIG_MODULES
1198
070b98bf 1199# By default, build modules as well
1da177e4 1200
73d1393e 1201all: modules
1da177e4 1202
3fbb43df 1203# Build modules
551559e1 1204#
3fbb43df
MY
1205# A module can be listed more than once in obj-m resulting in
1206# duplicate lines in modules.order files. Those are removed
1207# using awk while concatenating to the final file.
1da177e4 1208
4f193362 1209PHONY += modules
2da30e70 1210modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
551559e1 1211 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
fd54f502 1212 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1213 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1214
a6c36632
MM
1215modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1216 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1217
73d1393e 1218%/modules.builtin: include/config/auto.conf
a6c36632
MM
1219 $(Q)$(MAKE) $(modbuiltin)=$*
1220
1da177e4
LT
1221
1222# Target to prepare building external modules
4f193362 1223PHONY += modules_prepare
5bb78269 1224modules_prepare: prepare scripts
1da177e4
LT
1225
1226# Target to install modules
4f193362 1227PHONY += modules_install
1da177e4
LT
1228modules_install: _modinst_ _modinst_post
1229
4f193362 1230PHONY += _modinst_
2da30e70 1231_modinst_:
1da177e4
LT
1232 @rm -rf $(MODLIB)/kernel
1233 @rm -f $(MODLIB)/source
1234 @mkdir -p $(MODLIB)/kernel
8e9b4667 1235 @ln -s $(abspath $(srctree)) $(MODLIB)/source
1da177e4
LT
1236 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1237 rm -f $(MODLIB)/build ; \
7e1c0477 1238 ln -s $(CURDIR) $(MODLIB)/build ; \
1da177e4 1239 fi
551559e1 1240 @cp -f $(objtree)/modules.order $(MODLIB)/
bc081dd6 1241 @cp -f $(objtree)/modules.builtin $(MODLIB)/
b805aa0e 1242 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1243
50a8ec31 1244# This depmod is only for convenience to give the initial
1da177e4
LT
1245# boot a modules.dep even before / is mounted read-write. However the
1246# boot script depmod is the master version.
4f193362 1247PHONY += _modinst_post
6d128e1e 1248_modinst_post: _modinst_
50a8ec31 1249 $(call cmd,depmod)
1da177e4 1250
d890f510
JB
1251ifeq ($(CONFIG_MODULE_SIG), y)
1252PHONY += modules_sign
1253modules_sign:
1254 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1255endif
1256
1da177e4
LT
1257else # CONFIG_MODULES
1258
1259# Modules not configured
1260# ---------------------------------------------------------------------------
1261
612e47ce
MY
1262PHONY += modules modules_install
1263modules modules_install:
5369f550
MM
1264 @echo >&2
1265 @echo >&2 "The present kernel configuration has modules disabled."
1266 @echo >&2 "Type 'make config' and enable loadable module support."
1267 @echo >&2 "Then build a kernel with module support enabled."
1268 @echo >&2
1da177e4
LT
1269 @exit 1
1270
1271endif # CONFIG_MODULES
1272
1da177e4
LT
1273###
1274# Cleaning is done on three levels.
1275# make clean Delete most generated files
1276# Leave enough to build external modules
1277# make mrproper Delete the current configuration, and all generated files
1278# make distclean Remove editor backup files, patch leftover files and the like
1279
1280# Directories & files removed with 'make clean'
1281CLEAN_DIRS += $(MODVERDIR)
1da177e4
LT
1282
1283# Directories & files removed with 'make mrproper'
d8ecc5cd 1284MRPROPER_DIRS += include/config usr/include include/generated \
3fbb43df 1285 arch/*/include/generated .tmp_objdiff
c22bd32c 1286MRPROPER_FILES += .config .config.old .version .old_version \
d5b71936 1287 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
fb117949
DW
1288 signing_key.pem signing_key.priv signing_key.x509 \
1289 x509.genkey extra_certificates signing_key.x509.keyid \
3ee7b3fa 1290 signing_key.x509.signer vmlinux-gdb.py
1da177e4
LT
1291
1292# clean - Delete most, but leave enough to build external modules
1293#
1294clean: rm-dirs := $(CLEAN_DIRS)
1295clean: rm-files := $(CLEAN_FILES)
fb68d4be 1296clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1da177e4 1297
bd1ee804 1298PHONY += $(clean-dirs) clean archclean vmlinuxclean
1da177e4
LT
1299$(clean-dirs):
1300 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1301
bd1ee804
PM
1302vmlinuxclean:
1303 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
fbe6e37d 1304 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
bd1ee804
PM
1305
1306clean: archclean vmlinuxclean
1da177e4
LT
1307
1308# mrproper - Delete all generated files, including .config
1309#
1310mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1311mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
cb43fb57 1312mrproper-dirs := $(addprefix _mrproper_,scripts)
1da177e4 1313
4f193362 1314PHONY += $(mrproper-dirs) mrproper archmrproper
1da177e4
LT
1315$(mrproper-dirs):
1316 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1317
1318mrproper: clean archmrproper $(mrproper-dirs)
1319 $(call cmd,rmdirs)
1320 $(call cmd,rmfiles)
1321
1322# distclean
1323#
4f193362 1324PHONY += distclean
1da177e4
LT
1325
1326distclean: mrproper
1327 @find $(srctree) $(RCS_FIND_IGNORE) \
070b98bf 1328 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
f78271df
MY
1329 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1330 -o -name 'core' \) \
1da177e4
LT
1331 -type f -print | xargs rm -f
1332
1333
1334# Packaging of the kernel to various formats
1335# ---------------------------------------------------------------------------
1336# rpm target kept for backward compatibility
c79624c1 1337package-dir := scripts/package
1da177e4 1338
bafb6747
ACM
1339%src-pkg: FORCE
1340 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1341%pkg: include/config/kernel.release FORCE
6c2133e1 1342 $(Q)$(MAKE) $(build)=$(package-dir) $@
031ecc6d 1343rpm: include/config/kernel.release FORCE
6c2133e1 1344 $(Q)$(MAKE) $(build)=$(package-dir) $@
1da177e4
LT
1345
1346
1347# Brief documentation of the typical targets used
1348# ---------------------------------------------------------------------------
1349
5dffbe81 1350boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
a1e7b7bb 1351boards := $(sort $(notdir $(boards)))
5dffbe81
SB
1352board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1353board-dirs := $(sort $(notdir $(board-dirs:/=)))
1da177e4 1354
fe69b420 1355PHONY += help
1da177e4
LT
1356help:
1357 @echo 'Cleaning targets:'
5ea084ef 1358 @echo ' clean - Remove most generated files but keep the config and'
5cc8d246 1359 @echo ' enough build support to build external modules'
5ea084ef 1360 @echo ' mrproper - Remove all generated files + config + various backup files'
5cc8d246 1361 @echo ' distclean - mrproper + remove editor backup and patch files'
1da177e4
LT
1362 @echo ''
1363 @echo 'Configuration targets:'
1364 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1365 @echo ''
1366 @echo 'Other generic targets:'
1367 @echo ' all - Build all targets marked with [*]'
1368 @echo '* vmlinux - Build the bare kernel'
1369 @echo '* modules - Build all modules'
9cc5d74c 1370 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1da177e4 1371 @echo ' dir/ - Build all files in dir and below'
40ab87a4 1372 @echo ' dir/file.[ois] - Build specified target only'
433db3e2
VT
1373 @echo ' dir/file.ll - Build the LLVM assembly file'
1374 @echo ' (requires compiler support for LLVM assembly generation)'
62718979
JP
1375 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1376 @echo ' (requires a recent binutils and recent build (System.map))'
155ad605 1377 @echo ' dir/file.ko - Build module including final link'
c4d5ee67 1378 @echo ' modules_prepare - Set up for building external modules'
1da177e4
LT
1379 @echo ' tags/TAGS - Generate tags file for editors'
1380 @echo ' cscope - Generate cscope index'
f4ed1009 1381 @echo ' gtags - Generate GNU GLOBAL index'
3f1d9a6c
MM
1382 @echo ' kernelrelease - Output the release version string (use with make -s)'
1383 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1384 @echo ' image_name - Output the image name (use with make -s)'
2fb9b1bd 1385 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
59df3230 1386 echo ' (default: $(INSTALL_HDR_PATH))'; \
2fb9b1bd 1387 echo ''
31b8cc80 1388 @echo 'Static analysers:'
1da177e4
LT
1389 @echo ' checkstack - Generate a list of stack hogs'
1390 @echo ' namespacecheck - Name space analysis on compiled kernel'
aa025e7d 1391 @echo ' versioncheck - Sanity check on version.h usage'
ec2d987f 1392 @echo ' includecheck - Check for duplicate included header files'
295ac051 1393 @echo ' export_report - List the usages of all exported symbols'
179efcb4 1394 @echo ' headers_check - Sanity check on exported headers'
74425eee
NP
1395 @echo ' headerdep - Detect inclusion cycles in headers'
1396 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1397 @echo ''
31b8cc80 1398 @echo 'Kernel selftest:'
5a5da78b
SK
1399 @echo ' kselftest - Build and run kernel selftest (run as root)'
1400 @echo ' Build, install, and boot kernel before'
1401 @echo ' running kselftest on it'
dcb825a9 1402 @echo ' kselftest-clean - Remove all generated kselftest files'
bbfe63b6 1403 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
3d6dee7a 1404 @echo ' .config.'
5a5da78b 1405 @echo ''
31b8cc80
RD
1406 @echo 'Userspace tools targets:'
1407 @echo ' use "make tools/help"'
1408 @echo ' or "cd tools; make help"'
1409 @echo ''
1da177e4 1410 @echo 'Kernel packaging:'
6c2133e1 1411 @$(MAKE) $(build)=$(package-dir) help
1da177e4
LT
1412 @echo ''
1413 @echo 'Documentation targets:'
cb43fb57 1414 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1da177e4 1415 @echo ''
01dee188 1416 @echo 'Architecture specific targets ($(SRCARCH)):'
1da177e4 1417 @$(if $(archhelp),$(archhelp),\
01dee188 1418 echo ' No architecture specific help defined for $(SRCARCH)')
1da177e4
LT
1419 @echo ''
1420 @$(if $(boards), \
1421 $(foreach b, $(boards), \
1422 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1423 echo '')
5dffbe81
SB
1424 @$(if $(board-dirs), \
1425 $(foreach b, $(board-dirs), \
1426 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1427 printf " %-16s - Show all of the above\\n" help-boards; \
1428 echo '')
1da177e4
LT
1429
1430 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
45d506bd 1431 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1da177e4 1432 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
9ba26a72 1433 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
701842e3 1434 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
af07ce3e 1435 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
28bc20dc
SR
1436 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1437 @echo ' 1: warnings which may be relevant and do not occur too often'
1438 @echo ' 2: warnings which occur quite often but may still be relevant'
1439 @echo ' 3: more obscure warnings, can most likely be ignored'
a6de553d 1440 @echo ' Multiple levels can be combined with W=12 or W=123'
1da177e4
LT
1441 @echo ''
1442 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1443 @echo 'For further info see the ./README file'
1444
1445
5dffbe81
SB
1446help-board-dirs := $(addprefix help-,$(board-dirs))
1447
1448help-boards: $(help-board-dirs)
1449
fbae4d58 1450boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
5dffbe81
SB
1451
1452$(help-board-dirs): help-%:
1453 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1454 @$(if $(boards-per-dir), \
1455 $(foreach b, $(boards-per-dir), \
1456 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1457 echo '')
1458
1459
1da177e4
LT
1460# Documentation targets
1461# ---------------------------------------------------------------------------
18afab8c 1462DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs linkcheckdocs
22cba31b
JN
1463PHONY += $(DOC_TARGETS)
1464$(DOC_TARGETS): scripts_basic FORCE
cb43fb57 1465 $(Q)$(MAKE) $(build)=Documentation $@
1da177e4
LT
1466
1467else # KBUILD_EXTMOD
1468
1469###
1470# External module support.
1471# When building external modules the kernel used as basis is considered
1472# read-only, and no consistency checks are made and the make
1473# system is not used on the basis kernel. If updates are required
1474# in the basis kernel ordinary make commands (without M=...) must
1475# be used.
1476#
1477# The following are the only valid targets when building external
1478# modules.
1479# make M=dir clean Delete all automatically generated files
1480# make M=dir modules Make all modules in specified dir
1481# make M=dir Same as 'make M=dir modules'
1482# make M=dir modules_install
070b98bf 1483# Install the modules built in the module directory
1da177e4
LT
1484# Assumes install directory is already created
1485
1486# We are always building modules
1487KBUILD_MODULES := 1
4f193362 1488PHONY += crmodverdir
1da177e4 1489crmodverdir:
7bb9d092 1490 $(cmd_crmodverdir)
1da177e4 1491
4f193362 1492PHONY += $(objtree)/Module.symvers
1da177e4
LT
1493$(objtree)/Module.symvers:
1494 @test -e $(objtree)/Module.symvers || ( \
1495 echo; \
1496 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1497 echo " is missing; modules will have no dependencies and modversions."; \
1498 echo )
1499
1500module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
4f193362 1501PHONY += $(module-dirs) modules
1da177e4
LT
1502$(module-dirs): crmodverdir $(objtree)/Module.symvers
1503 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1504
1505modules: $(module-dirs)
fd54f502 1506 @$(kecho) ' Building modules, stage 2.';
b805aa0e 1507 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1da177e4 1508
4f193362 1509PHONY += modules_install
a67dc21a 1510modules_install: _emodinst_ _emodinst_post
e6304663 1511
4f193362
PS
1512install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1513PHONY += _emodinst_
a67dc21a 1514_emodinst_:
a67dc21a 1515 $(Q)mkdir -p $(MODLIB)/$(install-dir)
b805aa0e 1516 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1da177e4 1517
4f193362 1518PHONY += _emodinst_post
a67dc21a
SR
1519_emodinst_post: _emodinst_
1520 $(call cmd,depmod)
1521
1da177e4
LT
1522clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1523
4f193362 1524PHONY += $(clean-dirs) clean
1da177e4
LT
1525$(clean-dirs):
1526 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1527
1528clean: rm-dirs := $(MODVERDIR)
88d7be03 1529clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1da177e4 1530
fe69b420 1531PHONY += help
1da177e4
LT
1532help:
1533 @echo ' Building external modules.'
1534 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1535 @echo ''
1536 @echo ' modules - default target, build the module(s)'
1537 @echo ' modules_install - install the module'
1538 @echo ' clean - remove generated files in module directory only'
1539 @echo ''
06300b21
SR
1540
1541# Dummies...
4f193362 1542PHONY += prepare scripts
06300b21
SR
1543prepare: ;
1544scripts: ;
1da177e4
LT
1545endif # KBUILD_EXTMOD
1546
88d7be03
MM
1547clean: $(clean-dirs)
1548 $(call cmd,rmdirs)
1549 $(call cmd,rmfiles)
43f67c98 1550 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
88d7be03 1551 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
addbcdbb 1552 -o -name '*.ko.*' \
866ced95 1553 -o -name '*.dwo' \
d523b255 1554 -o -name '*.su' \
88d7be03
MM
1555 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1556 -o -name '*.symtypes' -o -name 'modules.order' \
1557 -o -name modules.builtin -o -name '.tmp_*.o.*' \
6b90bd4b 1558 -o -name '*.c.[012]*.*' \
433db3e2 1559 -o -name '*.ll' \
88d7be03
MM
1560 -o -name '*.gcno' \) -type f -print | xargs rm -f
1561
1da177e4
LT
1562# Generate tags for editors
1563# ---------------------------------------------------------------------------
a680eedc
SR
1564quiet_cmd_tags = GEN $@
1565 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1da177e4 1566
f4ed1009 1567tags TAGS cscope gtags: FORCE
1da177e4
LT
1568 $(call cmd,tags)
1569
1da177e4
LT
1570# Scripts to check various things for consistency
1571# ---------------------------------------------------------------------------
1572
279f3dd3
PF
1573PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1574
1da177e4 1575includecheck:
436f876c 1576 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1577 -name '*.[hcS]' -type f -print | sort \
80007434 1578 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1da177e4
LT
1579
1580versioncheck:
2ee2d292 1581 find $(srctree)/* $(RCS_FIND_IGNORE) \
1da177e4 1582 -name '*.[hcS]' -type f -print | sort \
80007434 1583 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1da177e4 1584
74425eee
NP
1585coccicheck:
1586 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1587
1da177e4
LT
1588namespacecheck:
1589 $(PERL) $(srctree)/scripts/namespace.pl
1590
295ac051
AB
1591export_report:
1592 $(PERL) $(srctree)/scripts/export_report.pl
1593
1da177e4
LT
1594endif #ifeq ($(config-targets),1)
1595endif #ifeq ($(mixed-targets),1)
1596
c398ff00 1597PHONY += checkstack kernelrelease kernelversion image_name
e3ccf6e3 1598
011e3a9a
JD
1599# UML needs a little special treatment here. It wants to use the host
1600# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1601# else wants $(ARCH), including people doing cross-builds, which means
1602# that $(SUBARCH) doesn't work here.
1603ifeq ($(ARCH), um)
1604CHECKSTACK_ARCH := $(SUBARCH)
1605else
1606CHECKSTACK_ARCH := $(ARCH)
1607endif
1da177e4
LT
1608checkstack:
1609 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
011e3a9a 1610 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1da177e4 1611
7b8ea53d
AW
1612kernelrelease:
1613 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
01ab1788 1614
cb58455c 1615kernelversion:
2244cbd8 1616 @echo $(KERNELVERSION)
1da177e4 1617
c398ff00
MM
1618image_name:
1619 @echo $(KBUILD_IMAGE)
1620
ea01fa9f
BP
1621# Clear a bunch of variables before executing the submake
1622tools/: FORCE
bf35182f 1623 $(Q)mkdir -p $(objtree)/tools
8e9b4667 1624 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
ea01fa9f
BP
1625
1626tools/%: FORCE
bf35182f 1627 $(Q)mkdir -p $(objtree)/tools
8e9b4667 1628 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
ea01fa9f 1629
06300b21
SR
1630# Single targets
1631# ---------------------------------------------------------------------------
bc2546a6 1632# Single targets are compatible with:
e1b8513d 1633# - build with mixed source and output
bc2546a6
SR
1634# - build with separate output dir 'make O=...'
1635# - external modules
1636#
1637# target-dir => where to store outputfile
1638# build-dir => directory in kernel source tree to use
1639
1640ifeq ($(KBUILD_EXTMOD),)
aa360879 1641 build-dir = $(patsubst %/,%,$(dir $@))
bc2546a6
SR
1642 target-dir = $(dir $@)
1643else
1644 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1645 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1646 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1647endif
1648
f6ecebd6 1649%.s: %.c prepare scripts FORCE
bc2546a6 1650 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1651%.i: %.c prepare scripts FORCE
bc2546a6 1652 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1653%.o: %.c prepare scripts FORCE
bc2546a6 1654 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1655%.lst: %.c prepare scripts FORCE
bc2546a6 1656 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1657%.s: %.S prepare scripts FORCE
bc2546a6 1658 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
f6ecebd6 1659%.o: %.S prepare scripts FORCE
bc2546a6 1660 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
15fde675
AG
1661%.symtypes: %.c prepare scripts FORCE
1662 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
433db3e2
VT
1663%.ll: %.c prepare scripts FORCE
1664 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
06300b21 1665
bc2546a6 1666# Modules
31110ebb
SR
1667/: prepare scripts FORCE
1668 $(cmd_crmodverdir)
1669 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1670 $(build)=$(build-dir)
8e2faea8 1671# Make sure the latest headers are built for Documentation
ddea05fa 1672Documentation/ samples/: headers_install
31110ebb 1673%/: prepare scripts FORCE
7bb9d092 1674 $(cmd_crmodverdir)
06300b21 1675 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6
SR
1676 $(build)=$(build-dir)
1677%.ko: prepare scripts FORCE
7bb9d092 1678 $(cmd_crmodverdir)
06300b21 1679 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
bc2546a6 1680 $(build)=$(build-dir) $(@:.ko=.o)
b805aa0e 1681 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
06300b21 1682
38385f8f 1683# FIXME Should go into a make.lib or something
1da177e4
LT
1684# ===========================================================================
1685
1686quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1687 cmd_rmdirs = rm -rf $(rm-dirs)
1688
1689quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1690 cmd_rmfiles = rm -f $(rm-files)
1691