1# SPDX-License-Identifier: GPL-2.0 2VERSION = 5 3PATCHLEVEL = 1 4SUBLEVEL = 0 5EXTRAVERSION = -rc3 6NAME = Shy Crocodile 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 14# That's our default target when none is given on the command line 15PHONY := _all 16_all: 17 18# We are using a recursive build, so we need to do a little thinking 19# to get the ordering right. 20# 21# Most importantly: sub-Makefiles should only ever modify files in 22# their own directory. If in some directory we have a dependency on 23# a file in another dir (which doesn't happen often, but it's often 24# unavoidable when linking the built-in.a targets which finally 25# turn into vmlinux), we will call a sub make in that other dir, and 26# after that we are sure that everything which is in that other dir 27# is now up to date. 28# 29# The only cases where we need to modify files which have global 30# effects are thus separated out and done before the recursive 31# descending is started. They are now explicitly listed as the 32# prepare rule. 33 34ifneq ($(sub_make_done),1) 35 36# Do not use make's built-in rules and variables 37# (this increases performance and avoids hard-to-debug behaviour) 38MAKEFLAGS += -rR 39 40# Avoid funny character set dependencies 41unexport LC_ALL 42LC_COLLATE=C 43LC_NUMERIC=C 44export LC_COLLATE LC_NUMERIC 45 46# Avoid interference with shell env settings 47unexport GREP_OPTIONS 48 49# Beautify output 50# --------------------------------------------------------------------------- 51# 52# Normally, we echo the whole command before executing it. By making 53# that echo $($(quiet)$(cmd)), we now have the possibility to set 54# $(quiet) to choose other forms of output instead, e.g. 55# 56# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 57# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 58# 59# If $(quiet) is empty, the whole command will be printed. 60# If it is set to "quiet_", only the short version will be printed. 61# If it is set to "silent_", nothing will be printed at all, since 62# the variable $(silent_cmd_cc_o_c) doesn't exist. 63# 64# A simple variant is to prefix commands with $(Q) - that's useful 65# for commands that shall be hidden in non-verbose mode. 66# 67# $(Q)ln $@ :< 68# 69# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 70# If KBUILD_VERBOSE equals 1 then the above command is displayed. 71# 72# To put more focus on warnings, be less verbose as default 73# Use 'make V=1' to see the full commands 74 75ifeq ("$(origin V)", "command line") 76 KBUILD_VERBOSE = $(V) 77endif 78ifndef KBUILD_VERBOSE 79 KBUILD_VERBOSE = 0 80endif 81 82ifeq ($(KBUILD_VERBOSE),1) 83 quiet = 84 Q = 85else 86 quiet=quiet_ 87 Q = @ 88endif 89 90# If the user is running make -s (silent mode), suppress echoing of 91# commands 92 93ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 94 quiet=silent_ 95endif 96 97export quiet Q KBUILD_VERBOSE 98 99# Kbuild will save output files in the current working directory. 100# This does not need to match to the root of the kernel source tree. 101# 102# For example, you can do this: 103# 104# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 105# 106# If you want to save output files in a different location, there are 107# two syntaxes to specify it. 108# 109# 1) O= 110# Use "make O=dir/to/store/output/files/" 111# 112# 2) Set KBUILD_OUTPUT 113# Set the environment variable KBUILD_OUTPUT to point to the output directory. 114# export KBUILD_OUTPUT=dir/to/store/output/files/; make 115# 116# The O= assignment takes precedence over the KBUILD_OUTPUT environment 117# variable. 118 119# Do we want to change the working directory? 120ifeq ("$(origin O)", "command line") 121 KBUILD_OUTPUT := $(O) 122endif 123 124ifneq ($(KBUILD_OUTPUT),) 125# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 126# expand a shell special character '~'. We use a somewhat tedious way here. 127abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 128$(if $(abs_objtree),, \ 129 $(error failed to create output directory "$(KBUILD_OUTPUT)")) 130 131# $(realpath ...) resolves symlinks 132abs_objtree := $(realpath $(abs_objtree)) 133else 134abs_objtree := $(CURDIR) 135endif # ifneq ($(KBUILD_OUTPUT),) 136 137ifeq ($(abs_objtree),$(CURDIR)) 138# Suppress "Entering directory ..." unless we are changing the work directory. 139MAKEFLAGS += --no-print-directory 140else 141need-sub-make := 1 142endif 143 144abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) 145 146ifneq ($(words $(subst :, ,$(abs_srctree))), 1) 147$(error source directory cannot contain spaces or colons) 148endif 149 150ifneq ($(abs_srctree),$(abs_objtree)) 151# Look for make include files relative to root of kernel src 152# 153# This does not become effective immediately because MAKEFLAGS is re-parsed 154# once after the Makefile is read. We need to invoke sub-make. 155MAKEFLAGS += --include-dir=$(abs_srctree) 156need-sub-make := 1 157endif 158 159ifneq ($(filter 3.%,$(MAKE_VERSION)),) 160# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 161# We need to invoke sub-make to avoid implicit rules in the top Makefile. 162need-sub-make := 1 163# Cancel implicit rules for this Makefile. 164$(lastword $(MAKEFILE_LIST)): ; 165endif 166 167export abs_srctree abs_objtree 168export sub_make_done := 1 169 170ifeq ($(need-sub-make),1) 171 172PHONY += $(MAKECMDGOALS) sub-make 173 174$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make 175 @: 176 177# Invoke a second make in the output directory, passing relevant variables 178sub-make: 179 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 180 181endif # need-sub-make 182endif # sub_make_done 183 184# We process the rest of the Makefile if this is the final invocation of make 185ifeq ($(need-sub-make),) 186 187# Do not print "Entering directory ...", 188# but we want to display it when entering to the output directory 189# so that IDEs/editors are able to understand relative filenames. 190MAKEFLAGS += --no-print-directory 191 192# Call a source code checker (by default, "sparse") as part of the 193# C compilation. 194# 195# Use 'make C=1' to enable checking of only re-compiled files. 196# Use 'make C=2' to enable checking of *all* source files, regardless 197# of whether they are re-compiled or not. 198# 199# See the file "Documentation/dev-tools/sparse.rst" for more details, 200# including where to get the "sparse" utility. 201 202ifeq ("$(origin C)", "command line") 203 KBUILD_CHECKSRC = $(C) 204endif 205ifndef KBUILD_CHECKSRC 206 KBUILD_CHECKSRC = 0 207endif 208 209# Use make M=dir to specify directory of external module to build 210# Old syntax make ... SUBDIRS=$PWD is still supported 211# Setting the environment variable KBUILD_EXTMOD take precedence 212ifdef SUBDIRS 213 $(warning ================= WARNING ================) 214 $(warning 'SUBDIRS' will be removed after Linux 5.3) 215 $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) 216 $(warning ==========================================) 217 KBUILD_EXTMOD ?= $(SUBDIRS) 218endif 219 220ifeq ("$(origin M)", "command line") 221 KBUILD_EXTMOD := $(M) 222endif 223 224ifeq ($(abs_srctree),$(abs_objtree)) 225 # building in the source tree 226 srctree := . 227else 228 ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 229 # building in a subdirectory of the source tree 230 srctree := .. 231 else 232 srctree := $(abs_srctree) 233 endif 234 235 # TODO: 236 # KBUILD_SRC is only used to distinguish in-tree/out-of-tree build. 237 # Replace it with $(srctree) or something. 238 KBUILD_SRC := $(abs_srctree) 239endif 240 241export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC 242 243objtree := . 244src := $(srctree) 245obj := $(objtree) 246 247VPATH := $(srctree) 248 249export srctree objtree VPATH 250 251# To make sure we do not include .config for any of the *config targets 252# catch them early, and hand them over to scripts/kconfig/Makefile 253# It is allowed to specify more targets when calling make, including 254# mixing *config targets and build targets. 255# For example 'make oldconfig all'. 256# Detect when mixed targets is specified, and make a second invocation 257# of make so .config is not included in this case either (for *config). 258 259version_h := include/generated/uapi/linux/version.h 260old_version_h := include/linux/version.h 261 262clean-targets := %clean mrproper cleandocs 263no-dot-config-targets := $(clean-targets) \ 264 cscope gtags TAGS tags help% %docs check% coccicheck \ 265 $(version_h) headers_% archheaders archscripts \ 266 %asm-generic kernelversion %src-pkg 267no-sync-config-targets := $(no-dot-config-targets) install %install \ 268 kernelrelease 269 270config-targets := 0 271mixed-targets := 0 272dot-config := 1 273may-sync-config := 1 274 275ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 276 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 277 dot-config := 0 278 endif 279endif 280 281ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 282 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 283 may-sync-config := 0 284 endif 285endif 286 287ifneq ($(KBUILD_EXTMOD),) 288 may-sync-config := 0 289endif 290 291ifeq ($(KBUILD_EXTMOD),) 292 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 293 config-targets := 1 294 ifneq ($(words $(MAKECMDGOALS)),1) 295 mixed-targets := 1 296 endif 297 endif 298endif 299 300# For "make -j clean all", "make -j mrproper defconfig all", etc. 301ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 302 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 303 mixed-targets := 1 304 endif 305endif 306 307# install and modules_install need also be processed one by one 308ifneq ($(filter install,$(MAKECMDGOALS)),) 309 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 310 mixed-targets := 1 311 endif 312endif 313 314ifeq ($(mixed-targets),1) 315# =========================================================================== 316# We're called with mixed targets (*config and build targets). 317# Handle them one by one. 318 319PHONY += $(MAKECMDGOALS) __build_one_by_one 320 321$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 322 @: 323 324__build_one_by_one: 325 $(Q)set -e; \ 326 for i in $(MAKECMDGOALS); do \ 327 $(MAKE) -f $(srctree)/Makefile $$i; \ 328 done 329 330else 331 332include scripts/Kbuild.include 333 334# Read KERNELRELEASE from include/config/kernel.release (if it exists) 335KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 336KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 337export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 338 339include scripts/subarch.include 340 341# Cross compiling and selecting different set of gcc/bin-utils 342# --------------------------------------------------------------------------- 343# 344# When performing cross compilation for other architectures ARCH shall be set 345# to the target architecture. (See arch/* for the possibilities). 346# ARCH can be set during invocation of make: 347# make ARCH=ia64 348# Another way is to have ARCH set in the environment. 349# The default ARCH is the host where make is executed. 350 351# CROSS_COMPILE specify the prefix used for all executables used 352# during compilation. Only gcc and related bin-utils executables 353# are prefixed with $(CROSS_COMPILE). 354# CROSS_COMPILE can be set on the command line 355# make CROSS_COMPILE=ia64-linux- 356# Alternatively CROSS_COMPILE can be set in the environment. 357# Default value for CROSS_COMPILE is not to prefix executables 358# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 359ARCH ?= $(SUBARCH) 360 361# Architecture as present in compile.h 362UTS_MACHINE := $(ARCH) 363SRCARCH := $(ARCH) 364 365# Additional ARCH settings for x86 366ifeq ($(ARCH),i386) 367 SRCARCH := x86 368endif 369ifeq ($(ARCH),x86_64) 370 SRCARCH := x86 371endif 372 373# Additional ARCH settings for sparc 374ifeq ($(ARCH),sparc32) 375 SRCARCH := sparc 376endif 377ifeq ($(ARCH),sparc64) 378 SRCARCH := sparc 379endif 380 381# Additional ARCH settings for sh 382ifeq ($(ARCH),sh64) 383 SRCARCH := sh 384endif 385 386KCONFIG_CONFIG ?= .config 387export KCONFIG_CONFIG 388 389# SHELL used by kbuild 390CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 391 else if [ -x /bin/bash ]; then echo /bin/bash; \ 392 else echo sh; fi ; fi) 393 394HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 395HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 396HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 397 398HOSTCC = gcc 399HOSTCXX = g++ 400KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 401 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ 402 $(HOSTCFLAGS) 403KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 404KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 405KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 406 407# Make variables (CC, etc...) 408AS = $(CROSS_COMPILE)as 409LD = $(CROSS_COMPILE)ld 410CC = $(CROSS_COMPILE)gcc 411CPP = $(CC) -E 412AR = $(CROSS_COMPILE)ar 413NM = $(CROSS_COMPILE)nm 414STRIP = $(CROSS_COMPILE)strip 415OBJCOPY = $(CROSS_COMPILE)objcopy 416OBJDUMP = $(CROSS_COMPILE)objdump 417LEX = flex 418YACC = bison 419AWK = awk 420INSTALLKERNEL := installkernel 421DEPMOD = /sbin/depmod 422PERL = perl 423PYTHON = python 424PYTHON2 = python2 425PYTHON3 = python3 426CHECK = sparse 427 428CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 429 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 430NOSTDINC_FLAGS := 431CFLAGS_MODULE = 432AFLAGS_MODULE = 433LDFLAGS_MODULE = 434CFLAGS_KERNEL = 435AFLAGS_KERNEL = 436LDFLAGS_vmlinux = 437 438# Use USERINCLUDE when you must reference the UAPI directories only. 439USERINCLUDE := \ 440 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 441 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 442 -I$(srctree)/include/uapi \ 443 -I$(objtree)/include/generated/uapi \ 444 -include $(srctree)/include/linux/kconfig.h 445 446# Use LINUXINCLUDE when you must reference the include/ directory. 447# Needed to be compatible with the O= option 448LINUXINCLUDE := \ 449 -I$(srctree)/arch/$(SRCARCH)/include \ 450 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 451 $(if $(filter .,$(srctree)),,-I$(srctree)/include) \ 452 -I$(objtree)/include \ 453 $(USERINCLUDE) 454 455KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 456KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 457 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 458 -Werror=implicit-function-declaration -Werror=implicit-int \ 459 -Wno-format-security \ 460 -std=gnu89 461KBUILD_CPPFLAGS := -D__KERNEL__ 462KBUILD_AFLAGS_KERNEL := 463KBUILD_CFLAGS_KERNEL := 464KBUILD_AFLAGS_MODULE := -DMODULE 465KBUILD_CFLAGS_MODULE := -DMODULE 466KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 467KBUILD_LDFLAGS := 468GCC_PLUGINS_CFLAGS := 469 470export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 471export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS 472export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE 473export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 474 475export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 476export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 477export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 478export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 479export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 480export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 481export KBUILD_ARFLAGS 482 483# When compiling out-of-tree modules, put MODVERDIR in the module 484# tree rather than in the kernel tree. The kernel tree might 485# even be read-only. 486export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 487 488# Files to ignore in find ... statements 489 490export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 491 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 492 -prune -o 493export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 494 --exclude CVS --exclude .pc --exclude .hg --exclude .git 495 496# =========================================================================== 497# Rules shared between *config targets and build targets 498 499# Basic helpers built in scripts/basic/ 500PHONY += scripts_basic 501scripts_basic: 502 $(Q)$(MAKE) $(build)=scripts/basic 503 $(Q)rm -f .tmp_quiet_recordmcount 504 505PHONY += outputmakefile 506# outputmakefile generates a Makefile in the output directory, if using a 507# separate output directory. This allows convenient use of make in the 508# output directory. 509# At the same time when output Makefile generated, generate .gitignore to 510# ignore whole output directory 511outputmakefile: 512ifneq ($(srctree),.) 513 $(Q)ln -fsn $(srctree) source 514 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 515 $(Q)test -e .gitignore || \ 516 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 517endif 518 519ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 520ifneq ($(CROSS_COMPILE),) 521CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) 522GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 523CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 524GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 525endif 526ifneq ($(GCC_TOOLCHAIN),) 527CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 528endif 529CLANG_FLAGS += -no-integrated-as 530KBUILD_CFLAGS += $(CLANG_FLAGS) 531KBUILD_AFLAGS += $(CLANG_FLAGS) 532export CLANG_FLAGS 533endif 534 535# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 536# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 537# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 538# and from include/config/auto.conf.cmd to detect the compiler upgrade. 539CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) 540 541ifeq ($(config-targets),1) 542# =========================================================================== 543# *config targets only - make sure prerequisites are updated, and descend 544# in scripts/kconfig to make the *config target 545 546# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 547# KBUILD_DEFCONFIG may point out an alternative default configuration 548# used for 'make defconfig' 549include arch/$(SRCARCH)/Makefile 550export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 551 552config: scripts_basic outputmakefile FORCE 553 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 554 555%config: scripts_basic outputmakefile FORCE 556 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 557 558else 559# =========================================================================== 560# Build targets only - this includes vmlinux, arch specific targets, clean 561# targets and others. In general all targets except *config targets. 562 563# If building an external module we do not care about the all: rule 564# but instead _all depend on modules 565PHONY += all 566ifeq ($(KBUILD_EXTMOD),) 567_all: all 568else 569_all: modules 570endif 571 572# Decide whether to build built-in, modular, or both. 573# Normally, just do built-in. 574 575KBUILD_MODULES := 576KBUILD_BUILTIN := 1 577 578# If we have only "make modules", don't compile built-in objects. 579# When we're building modules with modversions, we need to consider 580# the built-in objects during the descend as well, in order to 581# make sure the checksums are up to date before we record them. 582 583ifeq ($(MAKECMDGOALS),modules) 584 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 585endif 586 587# If we have "make <whatever> modules", compile modules 588# in addition to whatever we do anyway. 589# Just "make" or "make all" shall build modules as well 590 591ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 592 KBUILD_MODULES := 1 593endif 594 595ifeq ($(MAKECMDGOALS),) 596 KBUILD_MODULES := 1 597endif 598 599export KBUILD_MODULES KBUILD_BUILTIN 600 601ifeq ($(dot-config),1) 602include include/config/auto.conf 603endif 604 605ifeq ($(KBUILD_EXTMOD),) 606# Objects we will link into vmlinux / subdirs we need to visit 607init-y := init/ 608drivers-y := drivers/ sound/ 609drivers-$(CONFIG_SAMPLES) += samples/ 610net-y := net/ 611libs-y := lib/ 612core-y := usr/ 613virt-y := virt/ 614endif # KBUILD_EXTMOD 615 616# The all: target is the default when no target is given on the 617# command line. 618# This allow a user to issue only 'make' to build a kernel including modules 619# Defaults to vmlinux, but the arch makefile usually adds further targets 620all: vmlinux 621 622CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 623 $(call cc-option,-fno-tree-loop-im) \ 624 $(call cc-disable-warning,maybe-uninitialized,) 625export CFLAGS_GCOV 626 627# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 628ifdef CONFIG_FUNCTION_TRACER 629 CC_FLAGS_FTRACE := -pg 630endif 631 632RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 633RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 634RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 635RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 636RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 637RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 638export RETPOLINE_CFLAGS 639export RETPOLINE_VDSO_CFLAGS 640 641# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 642# values of the respective KBUILD_* variables 643ARCH_CPPFLAGS := 644ARCH_AFLAGS := 645ARCH_CFLAGS := 646include arch/$(SRCARCH)/Makefile 647 648ifeq ($(dot-config),1) 649ifeq ($(may-sync-config),1) 650# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 651# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 652# because some architectures define CROSS_COMPILE there. 653-include include/config/auto.conf.cmd 654 655$(KCONFIG_CONFIG): 656 @echo >&2 '***' 657 @echo >&2 '*** Configuration file "$@" not found!' 658 @echo >&2 '***' 659 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 660 @echo >&2 '*** "make menuconfig" or "make xconfig").' 661 @echo >&2 '***' 662 @/bin/false 663 664# The actual configuration files used during the build are stored in 665# include/generated/ and include/config/. Update them if .config is newer than 666# include/config/auto.conf (which mirrors .config). 667# 668# This exploits the 'multi-target pattern rule' trick. 669# The syncconfig should be executed only once to make all the targets. 670%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) 671 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 672else 673# External modules and some install targets need include/generated/autoconf.h 674# and include/config/auto.conf but do not care if they are up-to-date. 675# Use auto.conf to trigger the test 676PHONY += include/config/auto.conf 677 678include/config/auto.conf: 679 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 680 echo >&2; \ 681 echo >&2 " ERROR: Kernel configuration is invalid."; \ 682 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 683 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 684 echo >&2 ; \ 685 /bin/false) 686 687endif # may-sync-config 688endif # $(dot-config) 689 690KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 691KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 692KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 693KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 694KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) 695 696ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 697KBUILD_CFLAGS += -Os 698else 699KBUILD_CFLAGS += -O2 700endif 701 702ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED 703KBUILD_CFLAGS += -Wno-maybe-uninitialized 704endif 705 706# Tell gcc to never replace conditional load with a non-conditional one 707KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 708 709include scripts/Makefile.kcov 710include scripts/Makefile.gcc-plugins 711 712ifdef CONFIG_READABLE_ASM 713# Disable optimizations that make assembler listings hard to read. 714# reorder blocks reorders the control in the function 715# ipa clone creates specialized cloned functions 716# partial inlining inlines only parts of functions 717KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 718 $(call cc-option,-fno-ipa-cp-clone,) \ 719 $(call cc-option,-fno-partial-inlining) 720endif 721 722ifneq ($(CONFIG_FRAME_WARN),0) 723KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 724endif 725 726stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 727stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 728stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 729 730KBUILD_CFLAGS += $(stackp-flags-y) 731 732ifdef CONFIG_CC_IS_CLANG 733KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 734KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 735KBUILD_CFLAGS += $(call cc-disable-warning, gnu) 736KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 737# Quiet clang warning: comparison of unsigned expression < 0 is always false 738KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 739# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 740# source of a reference will be _MergedGlobals and not on of the whitelisted names. 741# See modpost pattern 2 742KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 743KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 744else 745 746# These warnings generated too much noise in a regular build. 747# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 748KBUILD_CFLAGS += -Wno-unused-but-set-variable 749endif 750 751KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 752ifdef CONFIG_FRAME_POINTER 753KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 754else 755# Some targets (ARM with Thumb2, for example), can't be built with frame 756# pointers. For those, we don't have FUNCTION_TRACER automatically 757# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 758# incompatible with -fomit-frame-pointer with current GCC, so we don't use 759# -fomit-frame-pointer with FUNCTION_TRACER. 760ifndef CONFIG_FUNCTION_TRACER 761KBUILD_CFLAGS += -fomit-frame-pointer 762endif 763endif 764 765DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 766 767ifdef CONFIG_DEBUG_INFO 768ifdef CONFIG_DEBUG_INFO_SPLIT 769DEBUG_CFLAGS += -gsplit-dwarf 770else 771DEBUG_CFLAGS += -g 772endif 773KBUILD_AFLAGS += -Wa,-gdwarf-2 774endif 775ifdef CONFIG_DEBUG_INFO_DWARF4 776DEBUG_CFLAGS += -gdwarf-4 777endif 778 779ifdef CONFIG_DEBUG_INFO_REDUCED 780DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 781 $(call cc-option,-fno-var-tracking) 782endif 783 784KBUILD_CFLAGS += $(DEBUG_CFLAGS) 785export DEBUG_CFLAGS 786 787ifdef CONFIG_FUNCTION_TRACER 788ifdef CONFIG_FTRACE_MCOUNT_RECORD 789 # gcc 5 supports generating the mcount tables directly 790 ifeq ($(call cc-option-yn,-mrecord-mcount),y) 791 CC_FLAGS_FTRACE += -mrecord-mcount 792 export CC_USING_RECORD_MCOUNT := 1 793 endif 794 ifdef CONFIG_HAVE_NOP_MCOUNT 795 ifeq ($(call cc-option-yn, -mnop-mcount),y) 796 CC_FLAGS_FTRACE += -mnop-mcount 797 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 798 endif 799 endif 800endif 801ifdef CONFIG_HAVE_FENTRY 802 ifeq ($(call cc-option-yn, -mfentry),y) 803 CC_FLAGS_FTRACE += -mfentry 804 CC_FLAGS_USING += -DCC_USING_FENTRY 805 endif 806endif 807export CC_FLAGS_FTRACE 808KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 809KBUILD_AFLAGS += $(CC_FLAGS_USING) 810ifdef CONFIG_DYNAMIC_FTRACE 811 ifdef CONFIG_HAVE_C_RECORDMCOUNT 812 BUILD_C_RECORDMCOUNT := y 813 export BUILD_C_RECORDMCOUNT 814 endif 815endif 816endif 817 818# We trigger additional mismatches with less inlining 819ifdef CONFIG_DEBUG_SECTION_MISMATCH 820KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 821endif 822 823ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 824KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 825LDFLAGS_vmlinux += --gc-sections 826endif 827 828# arch Makefile may override CC so keep this after arch Makefile is included 829NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 830 831# warn about C99 declaration after statement 832KBUILD_CFLAGS += -Wdeclaration-after-statement 833 834# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 835KBUILD_CFLAGS += $(call cc-option,-Wvla) 836 837# disable pointer signed / unsigned warnings in gcc 4.0 838KBUILD_CFLAGS += -Wno-pointer-sign 839 840# disable stringop warnings in gcc 8+ 841KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 842 843# disable invalid "can't wrap" optimizations for signed / pointers 844KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 845 846# clang sets -fmerge-all-constants by default as optimization, but this 847# is non-conforming behavior for C and in fact breaks the kernel, so we 848# need to disable it here generally. 849KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 850 851# for gcc -fno-merge-all-constants disables everything, but it is fine 852# to have actual conforming behavior enabled. 853KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 854 855# Make sure -fstack-check isn't enabled (like gentoo apparently did) 856KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 857 858# conserve stack if available 859KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 860 861# Prohibit date/time macros, which would make the build non-deterministic 862KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 863 864# enforce correct pointer usage 865KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 866 867# Require designated initializers for all marked structures 868KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 869 870# change __FILE__ to the relative path from the srctree 871KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 872 873# use the deterministic mode of AR if available 874KBUILD_ARFLAGS := $(call ar-option,D) 875 876include scripts/Makefile.kasan 877include scripts/Makefile.extrawarn 878include scripts/Makefile.ubsan 879 880# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 881# last assignments 882KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 883KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 884KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 885 886# Use --build-id when available. 887LDFLAGS_BUILD_ID := $(call ld-option, --build-id) 888KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 889LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 890 891ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 892LDFLAGS_vmlinux += $(call ld-option, -X,) 893endif 894 895# insure the checker run with the right endianness 896CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 897 898# the checker needs the correct machine size 899CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 900 901# Default kernel image to build when no specific target is given. 902# KBUILD_IMAGE may be overruled on the command line or 903# set in the environment 904# Also any assignments in arch/$(ARCH)/Makefile take precedence over 905# this default value 906export KBUILD_IMAGE ?= vmlinux 907 908# 909# INSTALL_PATH specifies where to place the updated kernel and system map 910# images. Default is /boot, but you can set it to other values 911export INSTALL_PATH ?= /boot 912 913# 914# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 915# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 916# an argument if needed. Otherwise it defaults to the kernel install path 917# 918export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 919 920# 921# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 922# relocations required by build roots. This is not defined in the 923# makefile but the argument can be passed to make if needed. 924# 925 926MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 927export MODLIB 928 929# 930# INSTALL_MOD_STRIP, if defined, will cause modules to be 931# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 932# the default option --strip-debug will be used. Otherwise, 933# INSTALL_MOD_STRIP value will be used as the options to the strip command. 934 935ifdef INSTALL_MOD_STRIP 936ifeq ($(INSTALL_MOD_STRIP),1) 937mod_strip_cmd = $(STRIP) --strip-debug 938else 939mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 940endif # INSTALL_MOD_STRIP=1 941else 942mod_strip_cmd = true 943endif # INSTALL_MOD_STRIP 944export mod_strip_cmd 945 946# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 947# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 948# or CONFIG_MODULE_COMPRESS_XZ. 949 950mod_compress_cmd = true 951ifdef CONFIG_MODULE_COMPRESS 952 ifdef CONFIG_MODULE_COMPRESS_GZIP 953 mod_compress_cmd = gzip -n -f 954 endif # CONFIG_MODULE_COMPRESS_GZIP 955 ifdef CONFIG_MODULE_COMPRESS_XZ 956 mod_compress_cmd = xz -f 957 endif # CONFIG_MODULE_COMPRESS_XZ 958endif # CONFIG_MODULE_COMPRESS 959export mod_compress_cmd 960 961ifdef CONFIG_MODULE_SIG_ALL 962$(eval $(call config_filename,MODULE_SIG_KEY)) 963 964mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 965else 966mod_sign_cmd = true 967endif 968export mod_sign_cmd 969 970HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 971 972ifdef CONFIG_STACK_VALIDATION 973 has_libelf := $(call try-run,\ 974 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 975 ifeq ($(has_libelf),1) 976 objtool_target := tools/objtool FORCE 977 else 978 SKIP_STACK_VALIDATION := 1 979 export SKIP_STACK_VALIDATION 980 endif 981endif 982 983PHONY += prepare0 984 985ifeq ($(KBUILD_EXTMOD),) 986core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 987 988vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 989 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 990 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 991 992vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 993 $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 994 $(drivers-) $(net-) $(libs-) $(virt-)))) 995 996init-y := $(patsubst %/, %/built-in.a, $(init-y)) 997core-y := $(patsubst %/, %/built-in.a, $(core-y)) 998drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 999net-y := $(patsubst %/, %/built-in.a, $(net-y)) 1000libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 1001libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 1002virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 1003 1004# Externally visible symbols (used by link-vmlinux.sh) 1005export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1006 $(drivers-y) $(net-y) $(virt-y) 1007export KBUILD_VMLINUX_LIBS := $(libs-y1) 1008export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1009export LDFLAGS_vmlinux 1010# used by scripts/package/Makefile 1011export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch include scripts tools) 1012 1013vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 1014 1015# Recurse until adjust_autoksyms.sh is satisfied 1016PHONY += autoksyms_recursive 1017autoksyms_recursive: $(vmlinux-deps) 1018ifdef CONFIG_TRIM_UNUSED_KSYMS 1019 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1020 "$(MAKE) -f $(srctree)/Makefile vmlinux" 1021endif 1022 1023# For the kernel to actually contain only the needed exported symbols, 1024# we have to build modules as well to determine what those symbols are. 1025# (this can be evaluated only once include/config/auto.conf has been included) 1026ifdef CONFIG_TRIM_UNUSED_KSYMS 1027 KBUILD_MODULES := 1 1028endif 1029 1030autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1031 1032$(autoksyms_h): 1033 $(Q)mkdir -p $(dir $@) 1034 $(Q)touch $@ 1035 1036ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1037 1038# Final link of vmlinux with optional arch pass after final link 1039cmd_link-vmlinux = \ 1040 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1041 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1042 1043vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1044 +$(call if_changed,link-vmlinux) 1045 1046targets := vmlinux 1047 1048# Some samples need headers_install. 1049samples: headers_install 1050 1051# The actual objects are generated when descending, 1052# make sure no implicit rule kicks in 1053$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 1054 1055# Handle descending into subdirectories listed in $(vmlinux-dirs) 1056# Preset locale variables to speed up the build process. Limit locale 1057# tweaks to this spot to avoid wrong language settings when running 1058# make menuconfig etc. 1059# Error messages still appears in the original language 1060 1061PHONY += $(vmlinux-dirs) 1062$(vmlinux-dirs): prepare 1063 $(Q)$(MAKE) $(build)=$@ need-builtin=1 1064 1065filechk_kernel.release = \ 1066 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1067 1068# Store (new) KERNELRELEASE string in include/config/kernel.release 1069include/config/kernel.release: FORCE 1070 $(call filechk,kernel.release) 1071 1072# Additional helpers built in scripts/ 1073# Carefully list dependencies so we do not try to build scripts twice 1074# in parallel 1075PHONY += scripts 1076scripts: scripts_basic scripts_dtc 1077 $(Q)$(MAKE) $(build)=$(@) 1078 1079# Things we need to do before we recursively start building the kernel 1080# or the modules are listed in "prepare". 1081# A multi level approach is used. prepareN is processed before prepareN-1. 1082# archprepare is used in arch Makefiles and when processed asm symlink, 1083# version.h and scripts_basic is processed / created. 1084 1085PHONY += prepare archprepare prepare1 prepare3 1086 1087# prepare3 is used to check if we are building in a separate output directory, 1088# and if so do: 1089# 1) Check that make has not been executed in the kernel src $(srctree) 1090prepare3: include/config/kernel.release 1091ifneq ($(srctree),.) 1092 @$(kecho) ' Using $(srctree) as source for kernel' 1093 $(Q)if [ -f $(srctree)/.config -o \ 1094 -d $(srctree)/include/config -o \ 1095 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 1096 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 1097 echo >&2 " in the '$(srctree)' directory.";\ 1098 /bin/false; \ 1099 fi; 1100endif 1101 1102prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \ 1103 include/generated/utsrelease.h 1104 $(cmd_crmodverdir) 1105 1106archprepare: archheaders archscripts prepare1 scripts 1107 1108prepare0: archprepare 1109 $(Q)$(MAKE) $(build)=scripts/mod 1110 $(Q)$(MAKE) $(build)=. 1111 1112# All the preparing.. 1113prepare: prepare0 prepare-objtool 1114 1115# Support for using generic headers in asm-generic 1116asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1117 1118PHONY += asm-generic uapi-asm-generic 1119asm-generic: uapi-asm-generic 1120 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1121 generic=include/asm-generic 1122uapi-asm-generic: 1123 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1124 generic=include/uapi/asm-generic 1125 1126PHONY += prepare-objtool 1127prepare-objtool: $(objtool_target) 1128ifeq ($(SKIP_STACK_VALIDATION),1) 1129ifdef CONFIG_UNWINDER_ORC 1130 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1131 @false 1132else 1133 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1134endif 1135endif 1136 1137# Generate some files 1138# --------------------------------------------------------------------------- 1139 1140# KERNELRELEASE can change from a few different places, meaning version.h 1141# needs to be updated, so this check is forced on all builds 1142 1143uts_len := 64 1144define filechk_utsrelease.h 1145 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1146 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1147 exit 1; \ 1148 fi; \ 1149 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1150endef 1151 1152define filechk_version.h 1153 echo \#define LINUX_VERSION_CODE $(shell \ 1154 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1155 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 1156endef 1157 1158$(version_h): FORCE 1159 $(call filechk,version.h) 1160 $(Q)rm -f $(old_version_h) 1161 1162include/generated/utsrelease.h: include/config/kernel.release FORCE 1163 $(call filechk,utsrelease.h) 1164 1165PHONY += headerdep 1166headerdep: 1167 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1168 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1169 1170# --------------------------------------------------------------------------- 1171# Kernel headers 1172 1173#Default location for installed headers 1174export INSTALL_HDR_PATH = $(objtree)/usr 1175 1176# If we do an all arch process set dst to include/arch-$(SRCARCH) 1177hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) 1178 1179PHONY += archheaders archscripts 1180 1181PHONY += __headers 1182__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts 1183 $(Q)$(MAKE) $(build)=scripts build_unifdef 1184 1185PHONY += headers_install_all 1186headers_install_all: 1187 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1188 1189PHONY += headers_install 1190headers_install: __headers 1191 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1192 $(error Headers not exportable for the $(SRCARCH) architecture)) 1193 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include 1194 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) 1195 1196PHONY += headers_check_all 1197headers_check_all: headers_install_all 1198 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1199 1200PHONY += headers_check 1201headers_check: headers_install 1202 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 1203 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 1204 1205ifdef CONFIG_HEADERS_CHECK 1206all: headers_check 1207endif 1208 1209# --------------------------------------------------------------------------- 1210# Kernel selftest 1211 1212PHONY += kselftest 1213kselftest: 1214 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1215 1216PHONY += kselftest-clean 1217kselftest-clean: 1218 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean 1219 1220PHONY += kselftest-merge 1221kselftest-merge: 1222 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1223 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 1224 -m $(objtree)/.config \ 1225 $(srctree)/tools/testing/selftests/*/config 1226 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1227 1228# --------------------------------------------------------------------------- 1229# Devicetree files 1230 1231ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1232dtstree := arch/$(SRCARCH)/boot/dts 1233endif 1234 1235ifneq ($(dtstree),) 1236 1237%.dtb: prepare3 scripts_dtc 1238 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1239 1240PHONY += dtbs dtbs_install dt_binding_check 1241dtbs dtbs_check: prepare3 scripts_dtc 1242 $(Q)$(MAKE) $(build)=$(dtstree) 1243 1244dtbs_check: export CHECK_DTBS=1 1245dtbs_check: dt_binding_check 1246 1247dtbs_install: 1248 $(Q)$(MAKE) $(dtbinst)=$(dtstree) 1249 1250ifdef CONFIG_OF_EARLY_FLATTREE 1251all: dtbs 1252endif 1253 1254endif 1255 1256PHONY += scripts_dtc 1257scripts_dtc: scripts_basic 1258 $(Q)$(MAKE) $(build)=scripts/dtc 1259 1260dt_binding_check: scripts_dtc 1261 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1262 1263# --------------------------------------------------------------------------- 1264# Modules 1265 1266ifdef CONFIG_MODULES 1267 1268# By default, build modules as well 1269 1270all: modules 1271 1272# Build modules 1273# 1274# A module can be listed more than once in obj-m resulting in 1275# duplicate lines in modules.order files. Those are removed 1276# using awk while concatenating to the final file. 1277 1278PHONY += modules 1279modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1280 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1281 @$(kecho) ' Building modules, stage 2.'; 1282 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1283 1284modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1285 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1286 1287%/modules.builtin: include/config/auto.conf include/config/tristate.conf 1288 $(Q)$(MAKE) $(modbuiltin)=$* 1289 1290 1291# Target to prepare building external modules 1292PHONY += modules_prepare 1293modules_prepare: prepare 1294 1295# Target to install modules 1296PHONY += modules_install 1297modules_install: _modinst_ _modinst_post 1298 1299PHONY += _modinst_ 1300_modinst_: 1301 @rm -rf $(MODLIB)/kernel 1302 @rm -f $(MODLIB)/source 1303 @mkdir -p $(MODLIB)/kernel 1304 @ln -s $(abspath $(srctree)) $(MODLIB)/source 1305 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1306 rm -f $(MODLIB)/build ; \ 1307 ln -s $(CURDIR) $(MODLIB)/build ; \ 1308 fi 1309 @cp -f $(objtree)/modules.order $(MODLIB)/ 1310 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1311 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1312 1313# This depmod is only for convenience to give the initial 1314# boot a modules.dep even before / is mounted read-write. However the 1315# boot script depmod is the master version. 1316PHONY += _modinst_post 1317_modinst_post: _modinst_ 1318 $(call cmd,depmod) 1319 1320ifeq ($(CONFIG_MODULE_SIG), y) 1321PHONY += modules_sign 1322modules_sign: 1323 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1324endif 1325 1326else # CONFIG_MODULES 1327 1328# Modules not configured 1329# --------------------------------------------------------------------------- 1330 1331PHONY += modules modules_install 1332modules modules_install: 1333 @echo >&2 1334 @echo >&2 "The present kernel configuration has modules disabled." 1335 @echo >&2 "Type 'make config' and enable loadable module support." 1336 @echo >&2 "Then build a kernel with module support enabled." 1337 @echo >&2 1338 @exit 1 1339 1340endif # CONFIG_MODULES 1341 1342### 1343# Cleaning is done on three levels. 1344# make clean Delete most generated files 1345# Leave enough to build external modules 1346# make mrproper Delete the current configuration, and all generated files 1347# make distclean Remove editor backup files, patch leftover files and the like 1348 1349# Directories & files removed with 'make clean' 1350CLEAN_DIRS += $(MODVERDIR) include/ksym 1351 1352# Directories & files removed with 'make mrproper' 1353MRPROPER_DIRS += include/config usr/include include/generated \ 1354 arch/$(SRCARCH)/include/generated .tmp_objdiff 1355MRPROPER_FILES += .config .config.old .version \ 1356 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1357 signing_key.pem signing_key.priv signing_key.x509 \ 1358 x509.genkey extra_certificates signing_key.x509.keyid \ 1359 signing_key.x509.signer vmlinux-gdb.py 1360 1361# clean - Delete most, but leave enough to build external modules 1362# 1363clean: rm-dirs := $(CLEAN_DIRS) 1364clean: rm-files := $(CLEAN_FILES) 1365clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs)) 1366 1367PHONY += $(clean-dirs) clean archclean vmlinuxclean 1368$(clean-dirs): 1369 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1370 1371vmlinuxclean: 1372 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1373 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1374 1375clean: archclean vmlinuxclean 1376 1377# mrproper - Delete all generated files, including .config 1378# 1379mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1380mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1381mrproper-dirs := $(addprefix _mrproper_,scripts) 1382 1383PHONY += $(mrproper-dirs) mrproper 1384$(mrproper-dirs): 1385 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1386 1387mrproper: clean $(mrproper-dirs) 1388 $(call cmd,rmdirs) 1389 $(call cmd,rmfiles) 1390 1391# distclean 1392# 1393PHONY += distclean 1394 1395distclean: mrproper 1396 @find $(srctree) $(RCS_FIND_IGNORE) \ 1397 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1398 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1399 -o -name 'core' \) \ 1400 -type f -print | xargs rm -f 1401 1402 1403# Packaging of the kernel to various formats 1404# --------------------------------------------------------------------------- 1405package-dir := scripts/package 1406 1407%src-pkg: FORCE 1408 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1409%pkg: include/config/kernel.release FORCE 1410 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1411 1412 1413# Brief documentation of the typical targets used 1414# --------------------------------------------------------------------------- 1415 1416boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1417boards := $(sort $(notdir $(boards))) 1418board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1419board-dirs := $(sort $(notdir $(board-dirs:/=))) 1420 1421PHONY += help 1422help: 1423 @echo 'Cleaning targets:' 1424 @echo ' clean - Remove most generated files but keep the config and' 1425 @echo ' enough build support to build external modules' 1426 @echo ' mrproper - Remove all generated files + config + various backup files' 1427 @echo ' distclean - mrproper + remove editor backup and patch files' 1428 @echo '' 1429 @echo 'Configuration targets:' 1430 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1431 @echo '' 1432 @echo 'Other generic targets:' 1433 @echo ' all - Build all targets marked with [*]' 1434 @echo '* vmlinux - Build the bare kernel' 1435 @echo '* modules - Build all modules' 1436 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1437 @echo ' dir/ - Build all files in dir and below' 1438 @echo ' dir/file.[ois] - Build specified target only' 1439 @echo ' dir/file.ll - Build the LLVM assembly file' 1440 @echo ' (requires compiler support for LLVM assembly generation)' 1441 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1442 @echo ' (requires a recent binutils and recent build (System.map))' 1443 @echo ' dir/file.ko - Build module including final link' 1444 @echo ' modules_prepare - Set up for building external modules' 1445 @echo ' tags/TAGS - Generate tags file for editors' 1446 @echo ' cscope - Generate cscope index' 1447 @echo ' gtags - Generate GNU GLOBAL index' 1448 @echo ' kernelrelease - Output the release version string (use with make -s)' 1449 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1450 @echo ' image_name - Output the image name (use with make -s)' 1451 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1452 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1453 echo '' 1454 @echo 'Static analysers:' 1455 @echo ' checkstack - Generate a list of stack hogs' 1456 @echo ' namespacecheck - Name space analysis on compiled kernel' 1457 @echo ' versioncheck - Sanity check on version.h usage' 1458 @echo ' includecheck - Check for duplicate included header files' 1459 @echo ' export_report - List the usages of all exported symbols' 1460 @echo ' headers_check - Sanity check on exported headers' 1461 @echo ' headerdep - Detect inclusion cycles in headers' 1462 @echo ' coccicheck - Check with Coccinelle' 1463 @echo '' 1464 @echo 'Kernel selftest:' 1465 @echo ' kselftest - Build and run kernel selftest (run as root)' 1466 @echo ' Build, install, and boot kernel before' 1467 @echo ' running kselftest on it' 1468 @echo ' kselftest-clean - Remove all generated kselftest files' 1469 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1470 @echo ' .config.' 1471 @echo '' 1472 @$(if $(dtstree), \ 1473 echo 'Devicetree:'; \ 1474 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1475 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1476 echo '') 1477 1478 @echo 'Userspace tools targets:' 1479 @echo ' use "make tools/help"' 1480 @echo ' or "cd tools; make help"' 1481 @echo '' 1482 @echo 'Kernel packaging:' 1483 @$(MAKE) $(build)=$(package-dir) help 1484 @echo '' 1485 @echo 'Documentation targets:' 1486 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1487 @echo '' 1488 @echo 'Architecture specific targets ($(SRCARCH)):' 1489 @$(if $(archhelp),$(archhelp),\ 1490 echo ' No architecture specific help defined for $(SRCARCH)') 1491 @echo '' 1492 @$(if $(boards), \ 1493 $(foreach b, $(boards), \ 1494 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1495 echo '') 1496 @$(if $(board-dirs), \ 1497 $(foreach b, $(board-dirs), \ 1498 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1499 printf " %-16s - Show all of the above\\n" help-boards; \ 1500 echo '') 1501 1502 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1503 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1504 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1505 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' 1506 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1507 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1508 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1509 @echo ' 1: warnings which may be relevant and do not occur too often' 1510 @echo ' 2: warnings which occur quite often but may still be relevant' 1511 @echo ' 3: more obscure warnings, can most likely be ignored' 1512 @echo ' Multiple levels can be combined with W=12 or W=123' 1513 @echo '' 1514 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1515 @echo 'For further info see the ./README file' 1516 1517 1518help-board-dirs := $(addprefix help-,$(board-dirs)) 1519 1520help-boards: $(help-board-dirs) 1521 1522boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1523 1524$(help-board-dirs): help-%: 1525 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1526 @$(if $(boards-per-dir), \ 1527 $(foreach b, $(boards-per-dir), \ 1528 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1529 echo '') 1530 1531 1532# Documentation targets 1533# --------------------------------------------------------------------------- 1534DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1535 linkcheckdocs dochelp refcheckdocs 1536PHONY += $(DOC_TARGETS) 1537$(DOC_TARGETS): scripts_basic FORCE 1538 $(Q)$(MAKE) $(build)=Documentation $@ 1539 1540# Misc 1541# --------------------------------------------------------------------------- 1542 1543PHONY += scripts_gdb 1544scripts_gdb: prepare 1545 $(Q)$(MAKE) $(build)=scripts/gdb 1546 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1547 1548ifdef CONFIG_GDB_SCRIPTS 1549all: scripts_gdb 1550endif 1551 1552else # KBUILD_EXTMOD 1553 1554### 1555# External module support. 1556# When building external modules the kernel used as basis is considered 1557# read-only, and no consistency checks are made and the make 1558# system is not used on the basis kernel. If updates are required 1559# in the basis kernel ordinary make commands (without M=...) must 1560# be used. 1561# 1562# The following are the only valid targets when building external 1563# modules. 1564# make M=dir clean Delete all automatically generated files 1565# make M=dir modules Make all modules in specified dir 1566# make M=dir Same as 'make M=dir modules' 1567# make M=dir modules_install 1568# Install the modules built in the module directory 1569# Assumes install directory is already created 1570 1571# We are always building modules 1572KBUILD_MODULES := 1 1573 1574PHONY += $(objtree)/Module.symvers 1575$(objtree)/Module.symvers: 1576 @test -e $(objtree)/Module.symvers || ( \ 1577 echo; \ 1578 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1579 echo " is missing; modules will have no dependencies and modversions."; \ 1580 echo ) 1581 1582module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1583PHONY += $(module-dirs) modules 1584$(module-dirs): prepare $(objtree)/Module.symvers 1585 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1586 1587modules: $(module-dirs) 1588 @$(kecho) ' Building modules, stage 2.'; 1589 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1590 1591PHONY += modules_install 1592modules_install: _emodinst_ _emodinst_post 1593 1594install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1595PHONY += _emodinst_ 1596_emodinst_: 1597 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1598 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1599 1600PHONY += _emodinst_post 1601_emodinst_post: _emodinst_ 1602 $(call cmd,depmod) 1603 1604clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1605 1606PHONY += $(clean-dirs) clean 1607$(clean-dirs): 1608 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1609 1610clean: rm-dirs := $(MODVERDIR) 1611clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1612 1613PHONY += help 1614help: 1615 @echo ' Building external modules.' 1616 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1617 @echo '' 1618 @echo ' modules - default target, build the module(s)' 1619 @echo ' modules_install - install the module' 1620 @echo ' clean - remove generated files in module directory only' 1621 @echo '' 1622 1623PHONY += prepare 1624prepare: 1625 $(cmd_crmodverdir) 1626endif # KBUILD_EXTMOD 1627 1628clean: $(clean-dirs) 1629 $(call cmd,rmdirs) 1630 $(call cmd,rmfiles) 1631 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1632 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1633 -o -name '*.ko.*' \ 1634 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1635 -o -name '*.dwo' -o -name '*.lst' \ 1636 -o -name '*.su' \ 1637 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1638 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1639 -o -name '*.asn1.[ch]' \ 1640 -o -name '*.symtypes' -o -name 'modules.order' \ 1641 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1642 -o -name '*.c.[012]*.*' \ 1643 -o -name '*.ll' \ 1644 -o -name '*.gcno' \) -type f -print | xargs rm -f 1645 1646# Generate tags for editors 1647# --------------------------------------------------------------------------- 1648quiet_cmd_tags = GEN $@ 1649 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1650 1651tags TAGS cscope gtags: FORCE 1652 $(call cmd,tags) 1653 1654# Scripts to check various things for consistency 1655# --------------------------------------------------------------------------- 1656 1657PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1658 1659includecheck: 1660 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1661 -name '*.[hcS]' -type f -print | sort \ 1662 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1663 1664versioncheck: 1665 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1666 -name '*.[hcS]' -type f -print | sort \ 1667 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1668 1669coccicheck: 1670 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1671 1672namespacecheck: 1673 $(PERL) $(srctree)/scripts/namespace.pl 1674 1675export_report: 1676 $(PERL) $(srctree)/scripts/export_report.pl 1677 1678PHONY += checkstack kernelrelease kernelversion image_name 1679 1680# UML needs a little special treatment here. It wants to use the host 1681# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1682# else wants $(ARCH), including people doing cross-builds, which means 1683# that $(SUBARCH) doesn't work here. 1684ifeq ($(ARCH), um) 1685CHECKSTACK_ARCH := $(SUBARCH) 1686else 1687CHECKSTACK_ARCH := $(ARCH) 1688endif 1689checkstack: 1690 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1691 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1692 1693kernelrelease: 1694 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1695 1696kernelversion: 1697 @echo $(KERNELVERSION) 1698 1699image_name: 1700 @echo $(KBUILD_IMAGE) 1701 1702# Clear a bunch of variables before executing the submake 1703 1704ifeq ($(quiet),silent_) 1705tools_silent=s 1706endif 1707 1708tools/: FORCE 1709 $(Q)mkdir -p $(objtree)/tools 1710 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ 1711 1712tools/%: FORCE 1713 $(Q)mkdir -p $(objtree)/tools 1714 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* 1715 1716# Single targets 1717# --------------------------------------------------------------------------- 1718# Single targets are compatible with: 1719# - build with mixed source and output 1720# - build with separate output dir 'make O=...' 1721# - external modules 1722# 1723# target-dir => where to store outputfile 1724# build-dir => directory in kernel source tree to use 1725 1726build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ 1727build-dir = $(patsubst %/,%,$(dir $(build-target))) 1728 1729%.i: prepare FORCE 1730 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1731%.ll: prepare FORCE 1732 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1733%.lst: prepare FORCE 1734 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1735%.o: prepare FORCE 1736 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1737%.s: prepare FORCE 1738 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1739%.symtypes: prepare FORCE 1740 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1741%.ko: %.o 1742 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1743 1744# Modules 1745PHONY += / 1746/: ./ 1747 1748# Make sure the latest headers are built for Documentation 1749Documentation/ samples/: headers_install 1750%/: prepare FORCE 1751 $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) 1752 1753# FIXME Should go into a make.lib or something 1754# =========================================================================== 1755 1756quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1757 cmd_rmdirs = rm -rf $(rm-dirs) 1758 1759quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1760 cmd_rmfiles = rm -f $(rm-files) 1761 1762# Run depmod only if we have System.map and depmod is executable 1763quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1764 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1765 $(KERNELRELEASE) 1766 1767# Create temporary dir for module support files 1768# clean it up only when building all modules 1769cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1770 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1771 1772# read saved command lines for existing targets 1773existing-targets := $(wildcard $(sort $(targets))) 1774 1775-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 1776 1777endif # ifeq ($(config-targets),1) 1778endif # ifeq ($(mixed-targets),1) 1779endif # need-sub-make 1780 1781PHONY += FORCE 1782FORCE: 1783 1784# Declare the contents of the PHONY variable as phony. We keep that 1785# information in a variable so we can use it in if_changed and friends. 1786.PHONY: $(PHONY) 1787