1# SPDX-License-Identifier: GPL-2.0 2VERSION = 5 3PATCHLEVEL = 2 4SUBLEVEL = 0 5EXTRAVERSION = 6NAME = Bobtail Squid 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 417PAHOLE = pahole 418LEX = flex 419YACC = bison 420AWK = awk 421INSTALLKERNEL := installkernel 422DEPMOD = /sbin/depmod 423PERL = perl 424PYTHON = python 425PYTHON2 = python2 426PYTHON3 = python3 427CHECK = sparse 428 429CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 430 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 431NOSTDINC_FLAGS := 432CFLAGS_MODULE = 433AFLAGS_MODULE = 434LDFLAGS_MODULE = 435CFLAGS_KERNEL = 436AFLAGS_KERNEL = 437LDFLAGS_vmlinux = 438 439# Use USERINCLUDE when you must reference the UAPI directories only. 440USERINCLUDE := \ 441 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 442 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 443 -I$(srctree)/include/uapi \ 444 -I$(objtree)/include/generated/uapi \ 445 -include $(srctree)/include/linux/kconfig.h 446 447# Use LINUXINCLUDE when you must reference the include/ directory. 448# Needed to be compatible with the O= option 449LINUXINCLUDE := \ 450 -I$(srctree)/arch/$(SRCARCH)/include \ 451 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 452 $(if $(filter .,$(srctree)),,-I$(srctree)/include) \ 453 -I$(objtree)/include \ 454 $(USERINCLUDE) 455 456KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 457KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 458 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 459 -Werror=implicit-function-declaration -Werror=implicit-int \ 460 -Wno-format-security \ 461 -std=gnu89 462KBUILD_CPPFLAGS := -D__KERNEL__ 463KBUILD_AFLAGS_KERNEL := 464KBUILD_CFLAGS_KERNEL := 465KBUILD_AFLAGS_MODULE := -DMODULE 466KBUILD_CFLAGS_MODULE := -DMODULE 467KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 468KBUILD_LDFLAGS := 469GCC_PLUGINS_CFLAGS := 470 471export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 472export CPP AR NM STRIP OBJCOPY OBJDUMP PAHOLE KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS 473export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE 474export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 475 476export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 477export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 478export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 479export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 480export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 481export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 482export KBUILD_ARFLAGS 483 484# When compiling out-of-tree modules, put MODVERDIR in the module 485# tree rather than in the kernel tree. The kernel tree might 486# even be read-only. 487export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 488 489# Files to ignore in find ... statements 490 491export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 492 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 493 -prune -o 494export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 495 --exclude CVS --exclude .pc --exclude .hg --exclude .git 496 497# =========================================================================== 498# Rules shared between *config targets and build targets 499 500# Basic helpers built in scripts/basic/ 501PHONY += scripts_basic 502scripts_basic: 503 $(Q)$(MAKE) $(build)=scripts/basic 504 $(Q)rm -f .tmp_quiet_recordmcount 505 506PHONY += outputmakefile 507# outputmakefile generates a Makefile in the output directory, if using a 508# separate output directory. This allows convenient use of make in the 509# output directory. 510# At the same time when output Makefile generated, generate .gitignore to 511# ignore whole output directory 512outputmakefile: 513ifneq ($(srctree),.) 514 $(Q)ln -fsn $(srctree) source 515 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 516 $(Q)test -e .gitignore || \ 517 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 518endif 519 520ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 521ifneq ($(CROSS_COMPILE),) 522CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) 523GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 524CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 525GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 526endif 527ifneq ($(GCC_TOOLCHAIN),) 528CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 529endif 530CLANG_FLAGS += -no-integrated-as 531KBUILD_CFLAGS += $(CLANG_FLAGS) 532KBUILD_AFLAGS += $(CLANG_FLAGS) 533export CLANG_FLAGS 534endif 535 536# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 537# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 538# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 539# and from include/config/auto.conf.cmd to detect the compiler upgrade. 540CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 541 542ifeq ($(config-targets),1) 543# =========================================================================== 544# *config targets only - make sure prerequisites are updated, and descend 545# in scripts/kconfig to make the *config target 546 547# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 548# KBUILD_DEFCONFIG may point out an alternative default configuration 549# used for 'make defconfig' 550include arch/$(SRCARCH)/Makefile 551export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 552 553config: scripts_basic outputmakefile FORCE 554 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 555 556%config: scripts_basic outputmakefile FORCE 557 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 558 559else 560# =========================================================================== 561# Build targets only - this includes vmlinux, arch specific targets, clean 562# targets and others. In general all targets except *config targets. 563 564# If building an external module we do not care about the all: rule 565# but instead _all depend on modules 566PHONY += all 567ifeq ($(KBUILD_EXTMOD),) 568_all: all 569else 570_all: modules 571endif 572 573# Decide whether to build built-in, modular, or both. 574# Normally, just do built-in. 575 576KBUILD_MODULES := 577KBUILD_BUILTIN := 1 578 579# If we have only "make modules", don't compile built-in objects. 580# When we're building modules with modversions, we need to consider 581# the built-in objects during the descend as well, in order to 582# make sure the checksums are up to date before we record them. 583 584ifeq ($(MAKECMDGOALS),modules) 585 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 586endif 587 588# If we have "make <whatever> modules", compile modules 589# in addition to whatever we do anyway. 590# Just "make" or "make all" shall build modules as well 591 592ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 593 KBUILD_MODULES := 1 594endif 595 596ifeq ($(MAKECMDGOALS),) 597 KBUILD_MODULES := 1 598endif 599 600export KBUILD_MODULES KBUILD_BUILTIN 601 602ifeq ($(dot-config),1) 603include include/config/auto.conf 604endif 605 606ifeq ($(KBUILD_EXTMOD),) 607# Objects we will link into vmlinux / subdirs we need to visit 608init-y := init/ 609drivers-y := drivers/ sound/ 610drivers-$(CONFIG_SAMPLES) += samples/ 611net-y := net/ 612libs-y := lib/ 613core-y := usr/ 614virt-y := virt/ 615endif # KBUILD_EXTMOD 616 617# The all: target is the default when no target is given on the 618# command line. 619# This allow a user to issue only 'make' to build a kernel including modules 620# Defaults to vmlinux, but the arch makefile usually adds further targets 621all: vmlinux 622 623CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 624 $(call cc-option,-fno-tree-loop-im) \ 625 $(call cc-disable-warning,maybe-uninitialized,) 626export CFLAGS_GCOV 627 628# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 629ifdef CONFIG_FUNCTION_TRACER 630 CC_FLAGS_FTRACE := -pg 631endif 632 633RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 634RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 635RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 636RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 637RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 638RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 639export RETPOLINE_CFLAGS 640export RETPOLINE_VDSO_CFLAGS 641 642# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 643# values of the respective KBUILD_* variables 644ARCH_CPPFLAGS := 645ARCH_AFLAGS := 646ARCH_CFLAGS := 647include arch/$(SRCARCH)/Makefile 648 649ifeq ($(dot-config),1) 650ifeq ($(may-sync-config),1) 651# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 652# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 653# because some architectures define CROSS_COMPILE there. 654include include/config/auto.conf.cmd 655 656$(KCONFIG_CONFIG): 657 @echo >&2 '***' 658 @echo >&2 '*** Configuration file "$@" not found!' 659 @echo >&2 '***' 660 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 661 @echo >&2 '*** "make menuconfig" or "make xconfig").' 662 @echo >&2 '***' 663 @/bin/false 664 665# The actual configuration files used during the build are stored in 666# include/generated/ and include/config/. Update them if .config is newer than 667# include/config/auto.conf (which mirrors .config). 668# 669# This exploits the 'multi-target pattern rule' trick. 670# The syncconfig should be executed only once to make all the targets. 671%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) 672 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 673else 674# External modules and some install targets need include/generated/autoconf.h 675# and include/config/auto.conf but do not care if they are up-to-date. 676# Use auto.conf to trigger the test 677PHONY += include/config/auto.conf 678 679include/config/auto.conf: 680 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 681 echo >&2; \ 682 echo >&2 " ERROR: Kernel configuration is invalid."; \ 683 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 684 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 685 echo >&2 ; \ 686 /bin/false) 687 688endif # may-sync-config 689endif # $(dot-config) 690 691KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 692KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 693KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 694KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 695KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 696 697ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 698KBUILD_CFLAGS += -Os 699else 700KBUILD_CFLAGS += -O2 701endif 702 703ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED 704KBUILD_CFLAGS += -Wno-maybe-uninitialized 705endif 706 707# Tell gcc to never replace conditional load with a non-conditional one 708KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 709 710include scripts/Makefile.kcov 711include scripts/Makefile.gcc-plugins 712 713ifdef CONFIG_READABLE_ASM 714# Disable optimizations that make assembler listings hard to read. 715# reorder blocks reorders the control in the function 716# ipa clone creates specialized cloned functions 717# partial inlining inlines only parts of functions 718KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 719 $(call cc-option,-fno-ipa-cp-clone,) \ 720 $(call cc-option,-fno-partial-inlining) 721endif 722 723ifneq ($(CONFIG_FRAME_WARN),0) 724KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 725endif 726 727stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 728stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 729stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 730 731KBUILD_CFLAGS += $(stackp-flags-y) 732 733ifdef CONFIG_CC_IS_CLANG 734KBUILD_CPPFLAGS += -Qunused-arguments 735KBUILD_CFLAGS += -Wno-format-invalid-specifier 736KBUILD_CFLAGS += -Wno-gnu 737# Quiet clang warning: comparison of unsigned expression < 0 is always false 738KBUILD_CFLAGS += -Wno-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 += -mno-global-merge 743else 744 745# These warnings generated too much noise in a regular build. 746# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 747KBUILD_CFLAGS += -Wno-unused-but-set-variable 748endif 749 750KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 751ifdef CONFIG_FRAME_POINTER 752KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 753else 754# Some targets (ARM with Thumb2, for example), can't be built with frame 755# pointers. For those, we don't have FUNCTION_TRACER automatically 756# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 757# incompatible with -fomit-frame-pointer with current GCC, so we don't use 758# -fomit-frame-pointer with FUNCTION_TRACER. 759ifndef CONFIG_FUNCTION_TRACER 760KBUILD_CFLAGS += -fomit-frame-pointer 761endif 762endif 763 764# Initialize all stack variables with a pattern, if desired. 765ifdef CONFIG_INIT_STACK_ALL 766KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 767endif 768 769DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 770 771ifdef CONFIG_DEBUG_INFO 772ifdef CONFIG_DEBUG_INFO_SPLIT 773DEBUG_CFLAGS += -gsplit-dwarf 774else 775DEBUG_CFLAGS += -g 776endif 777KBUILD_AFLAGS += -Wa,-gdwarf-2 778endif 779ifdef CONFIG_DEBUG_INFO_DWARF4 780DEBUG_CFLAGS += -gdwarf-4 781endif 782 783ifdef CONFIG_DEBUG_INFO_REDUCED 784DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 785 $(call cc-option,-fno-var-tracking) 786endif 787 788KBUILD_CFLAGS += $(DEBUG_CFLAGS) 789export DEBUG_CFLAGS 790 791ifdef CONFIG_FUNCTION_TRACER 792ifdef CONFIG_FTRACE_MCOUNT_RECORD 793 # gcc 5 supports generating the mcount tables directly 794 ifeq ($(call cc-option-yn,-mrecord-mcount),y) 795 CC_FLAGS_FTRACE += -mrecord-mcount 796 export CC_USING_RECORD_MCOUNT := 1 797 endif 798 ifdef CONFIG_HAVE_NOP_MCOUNT 799 ifeq ($(call cc-option-yn, -mnop-mcount),y) 800 CC_FLAGS_FTRACE += -mnop-mcount 801 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 802 endif 803 endif 804endif 805ifdef CONFIG_HAVE_FENTRY 806 ifeq ($(call cc-option-yn, -mfentry),y) 807 CC_FLAGS_FTRACE += -mfentry 808 CC_FLAGS_USING += -DCC_USING_FENTRY 809 endif 810endif 811export CC_FLAGS_FTRACE 812KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 813KBUILD_AFLAGS += $(CC_FLAGS_USING) 814ifdef CONFIG_DYNAMIC_FTRACE 815 ifdef CONFIG_HAVE_C_RECORDMCOUNT 816 BUILD_C_RECORDMCOUNT := y 817 export BUILD_C_RECORDMCOUNT 818 endif 819endif 820endif 821 822# We trigger additional mismatches with less inlining 823ifdef CONFIG_DEBUG_SECTION_MISMATCH 824KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 825endif 826 827ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 828KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 829LDFLAGS_vmlinux += --gc-sections 830endif 831 832ifdef CONFIG_LIVEPATCH 833KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 834endif 835 836# arch Makefile may override CC so keep this after arch Makefile is included 837NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 838 839# warn about C99 declaration after statement 840KBUILD_CFLAGS += -Wdeclaration-after-statement 841 842# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 843KBUILD_CFLAGS += -Wvla 844 845# disable pointer signed / unsigned warnings in gcc 4.0 846KBUILD_CFLAGS += -Wno-pointer-sign 847 848# disable stringop warnings in gcc 8+ 849KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 850 851# disable invalid "can't wrap" optimizations for signed / pointers 852KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 853 854# clang sets -fmerge-all-constants by default as optimization, but this 855# is non-conforming behavior for C and in fact breaks the kernel, so we 856# need to disable it here generally. 857KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 858 859# for gcc -fno-merge-all-constants disables everything, but it is fine 860# to have actual conforming behavior enabled. 861KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 862 863# Make sure -fstack-check isn't enabled (like gentoo apparently did) 864KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 865 866# conserve stack if available 867KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 868 869# Prohibit date/time macros, which would make the build non-deterministic 870KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 871 872# enforce correct pointer usage 873KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 874 875# Require designated initializers for all marked structures 876KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 877 878# change __FILE__ to the relative path from the srctree 879KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 880 881# use the deterministic mode of AR if available 882KBUILD_ARFLAGS := $(call ar-option,D) 883 884include scripts/Makefile.kasan 885include scripts/Makefile.extrawarn 886include scripts/Makefile.ubsan 887 888# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 889# last assignments 890KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 891KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 892KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 893 894# Use --build-id when available. 895LDFLAGS_BUILD_ID := $(call ld-option, --build-id) 896KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 897LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 898 899ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 900LDFLAGS_vmlinux += $(call ld-option, -X,) 901endif 902 903# insure the checker run with the right endianness 904CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 905 906# the checker needs the correct machine size 907CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 908 909# Default kernel image to build when no specific target is given. 910# KBUILD_IMAGE may be overruled on the command line or 911# set in the environment 912# Also any assignments in arch/$(ARCH)/Makefile take precedence over 913# this default value 914export KBUILD_IMAGE ?= vmlinux 915 916# 917# INSTALL_PATH specifies where to place the updated kernel and system map 918# images. Default is /boot, but you can set it to other values 919export INSTALL_PATH ?= /boot 920 921# 922# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 923# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 924# an argument if needed. Otherwise it defaults to the kernel install path 925# 926export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 927 928# 929# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 930# relocations required by build roots. This is not defined in the 931# makefile but the argument can be passed to make if needed. 932# 933 934MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 935export MODLIB 936 937# 938# INSTALL_MOD_STRIP, if defined, will cause modules to be 939# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 940# the default option --strip-debug will be used. Otherwise, 941# INSTALL_MOD_STRIP value will be used as the options to the strip command. 942 943ifdef INSTALL_MOD_STRIP 944ifeq ($(INSTALL_MOD_STRIP),1) 945mod_strip_cmd = $(STRIP) --strip-debug 946else 947mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 948endif # INSTALL_MOD_STRIP=1 949else 950mod_strip_cmd = true 951endif # INSTALL_MOD_STRIP 952export mod_strip_cmd 953 954# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 955# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 956# or CONFIG_MODULE_COMPRESS_XZ. 957 958mod_compress_cmd = true 959ifdef CONFIG_MODULE_COMPRESS 960 ifdef CONFIG_MODULE_COMPRESS_GZIP 961 mod_compress_cmd = gzip -n -f 962 endif # CONFIG_MODULE_COMPRESS_GZIP 963 ifdef CONFIG_MODULE_COMPRESS_XZ 964 mod_compress_cmd = xz -f 965 endif # CONFIG_MODULE_COMPRESS_XZ 966endif # CONFIG_MODULE_COMPRESS 967export mod_compress_cmd 968 969ifdef CONFIG_MODULE_SIG_ALL 970$(eval $(call config_filename,MODULE_SIG_KEY)) 971 972mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 973else 974mod_sign_cmd = true 975endif 976export mod_sign_cmd 977 978HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 979 980ifdef CONFIG_STACK_VALIDATION 981 has_libelf := $(call try-run,\ 982 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 983 ifeq ($(has_libelf),1) 984 objtool_target := tools/objtool FORCE 985 else 986 SKIP_STACK_VALIDATION := 1 987 export SKIP_STACK_VALIDATION 988 endif 989endif 990 991PHONY += prepare0 992 993ifeq ($(KBUILD_EXTMOD),) 994core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 995 996vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 997 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 998 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 999 1000vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
1001 $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 1002 $(drivers-) $(net-) $(libs-) $(virt-)))) 1003 1004init-y := $(patsubst %/, %/built-in.a, $(init-y)) 1005core-y := $(patsubst %/, %/built-in.a, $(core-y)) 1006drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1007net-y := $(patsubst %/, %/built-in.a, $(net-y)) 1008libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 1009libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 1010virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 1011 1012# Externally visible symbols (used by link-vmlinux.sh) 1013export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1014 $(drivers-y) $(net-y) $(virt-y) 1015export KBUILD_VMLINUX_LIBS := $(libs-y1) 1016export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1017export LDFLAGS_vmlinux 1018# used by scripts/package/Makefile 1019export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 1020 1021vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 1022 1023# Recurse until adjust_autoksyms.sh is satisfied 1024PHONY += autoksyms_recursive 1025autoksyms_recursive: $(vmlinux-deps) 1026ifdef CONFIG_TRIM_UNUSED_KSYMS 1027 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1028 "$(MAKE) -f $(srctree)/Makefile vmlinux" 1029endif 1030 1031# For the kernel to actually contain only the needed exported symbols, 1032# we have to build modules as well to determine what those symbols are. 1033# (this can be evaluated only once include/config/auto.conf has been included) 1034ifdef CONFIG_TRIM_UNUSED_KSYMS 1035 KBUILD_MODULES := 1 1036endif 1037 1038autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1039 1040$(autoksyms_h): 1041 $(Q)mkdir -p $(dir $@) 1042 $(Q)touch $@ 1043 1044ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1045 1046# Final link of vmlinux with optional arch pass after final link 1047cmd_link-vmlinux = \ 1048 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1049 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1050 1051vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1052 +$(call if_changed,link-vmlinux) 1053 1054targets := vmlinux 1055 1056# Some samples need headers_install. 1057samples: headers_install 1058 1059# The actual objects are generated when descending, 1060# make sure no implicit rule kicks in 1061$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 1062 1063# Handle descending into subdirectories listed in $(vmlinux-dirs) 1064# Preset locale variables to speed up the build process. Limit locale 1065# tweaks to this spot to avoid wrong language settings when running 1066# make menuconfig etc. 1067# Error messages still appears in the original language 1068 1069PHONY += $(vmlinux-dirs) 1070$(vmlinux-dirs): prepare 1071 $(Q)$(MAKE) $(build)=$@ need-builtin=1 1072 1073filechk_kernel.release = \ 1074 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1075 1076# Store (new) KERNELRELEASE string in include/config/kernel.release 1077include/config/kernel.release: FORCE 1078 $(call filechk,kernel.release) 1079 1080# Additional helpers built in scripts/ 1081# Carefully list dependencies so we do not try to build scripts twice 1082# in parallel 1083PHONY += scripts 1084scripts: scripts_basic scripts_dtc 1085 $(Q)$(MAKE) $(build)=$(@) 1086 1087# Things we need to do before we recursively start building the kernel 1088# or the modules are listed in "prepare". 1089# A multi level approach is used. prepareN is processed before prepareN-1. 1090# archprepare is used in arch Makefiles and when processed asm symlink, 1091# version.h and scripts_basic is processed / created. 1092 1093PHONY += prepare archprepare prepare1 prepare3 1094 1095# prepare3 is used to check if we are building in a separate output directory, 1096# and if so do: 1097# 1) Check that make has not been executed in the kernel src $(srctree) 1098prepare3: include/config/kernel.release 1099ifneq ($(srctree),.) 1100 @$(kecho) ' Using $(srctree) as source for kernel' 1101 $(Q)if [ -f $(srctree)/.config -o \ 1102 -d $(srctree)/include/config -o \ 1103 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 1104 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 1105 echo >&2 " in the '$(srctree)' directory.";\ 1106 /bin/false; \ 1107 fi; 1108endif 1109 1110prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \ 1111 include/generated/utsrelease.h 1112 $(cmd_crmodverdir) 1113 1114archprepare: archheaders archscripts prepare1 scripts 1115 1116prepare0: archprepare 1117 $(Q)$(MAKE) $(build)=scripts/mod 1118 $(Q)$(MAKE) $(build)=. 1119 1120# All the preparing.. 1121prepare: prepare0 prepare-objtool 1122 1123# Support for using generic headers in asm-generic 1124asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1125 1126PHONY += asm-generic uapi-asm-generic 1127asm-generic: uapi-asm-generic 1128 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1129 generic=include/asm-generic 1130uapi-asm-generic: 1131 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1132 generic=include/uapi/asm-generic 1133 1134PHONY += prepare-objtool 1135prepare-objtool: $(objtool_target) 1136ifeq ($(SKIP_STACK_VALIDATION),1) 1137ifdef CONFIG_UNWINDER_ORC 1138 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1139 @false 1140else 1141 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1142endif 1143endif 1144 1145# Generate some files 1146# --------------------------------------------------------------------------- 1147 1148# KERNELRELEASE can change from a few different places, meaning version.h 1149# needs to be updated, so this check is forced on all builds 1150 1151uts_len := 64 1152define filechk_utsrelease.h 1153 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1154 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1155 exit 1; \ 1156 fi; \ 1157 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1158endef 1159 1160define filechk_version.h 1161 echo \#define LINUX_VERSION_CODE $(shell \ 1162 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1163 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 1164endef 1165 1166$(version_h): FORCE 1167 $(call filechk,version.h) 1168 $(Q)rm -f $(old_version_h) 1169 1170include/generated/utsrelease.h: include/config/kernel.release FORCE 1171 $(call filechk,utsrelease.h) 1172 1173PHONY += headerdep 1174headerdep: 1175 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1176 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1177 1178# --------------------------------------------------------------------------- 1179# Kernel headers 1180 1181#Default location for installed headers 1182export INSTALL_HDR_PATH = $(objtree)/usr 1183 1184# If we do an all arch process set dst to include/arch-$(SRCARCH) 1185hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) 1186 1187PHONY += archheaders archscripts 1188 1189PHONY += __headers 1190__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts 1191 $(Q)$(MAKE) $(build)=scripts build_unifdef 1192 1193PHONY += headers_install_all 1194headers_install_all: 1195 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1196 1197PHONY += headers_install 1198headers_install: __headers 1199 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1200 $(error Headers not exportable for the $(SRCARCH) architecture)) 1201 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include 1202 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) 1203 1204PHONY += headers_check_all 1205headers_check_all: headers_install_all 1206 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1207 1208PHONY += headers_check 1209headers_check: headers_install 1210 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 1211 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 1212 1213ifdef CONFIG_HEADERS_CHECK 1214all: headers_check 1215endif 1216 1217# --------------------------------------------------------------------------- 1218# Kernel selftest 1219 1220PHONY += kselftest 1221kselftest: 1222 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1223 1224PHONY += kselftest-clean 1225kselftest-clean: 1226 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean 1227 1228PHONY += kselftest-merge 1229kselftest-merge: 1230 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1231 $(Q)find $(srctree)/tools/testing/selftests -name config | \ 1232 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 1233 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1234 1235# --------------------------------------------------------------------------- 1236# Devicetree files 1237 1238ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1239dtstree := arch/$(SRCARCH)/boot/dts 1240endif 1241 1242ifneq ($(dtstree),) 1243 1244%.dtb: prepare3 scripts_dtc 1245 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1246 1247PHONY += dtbs dtbs_install dt_binding_check 1248dtbs dtbs_check: prepare3 scripts_dtc 1249 $(Q)$(MAKE) $(build)=$(dtstree) 1250 1251dtbs_check: export CHECK_DTBS=1 1252dtbs_check: dt_binding_check 1253 1254dtbs_install: 1255 $(Q)$(MAKE) $(dtbinst)=$(dtstree) 1256 1257ifdef CONFIG_OF_EARLY_FLATTREE 1258all: dtbs 1259endif 1260 1261endif 1262 1263PHONY += scripts_dtc 1264scripts_dtc: scripts_basic 1265 $(Q)$(MAKE) $(build)=scripts/dtc 1266 1267dt_binding_check: scripts_dtc 1268 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1269 1270# --------------------------------------------------------------------------- 1271# Modules 1272 1273ifdef CONFIG_MODULES 1274 1275# By default, build modules as well 1276 1277all: modules 1278 1279# Build modules 1280# 1281# A module can be listed more than once in obj-m resulting in 1282# duplicate lines in modules.order files. Those are removed 1283# using awk while concatenating to the final file. 1284 1285PHONY += modules 1286modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1287 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1288 @$(kecho) ' Building modules, stage 2.'; 1289 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1290 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 1291 1292modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1293 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1294 1295%/modules.builtin: include/config/auto.conf include/config/tristate.conf 1296 $(Q)$(MAKE) $(modbuiltin)=$* 1297 1298 1299# Target to prepare building external modules 1300PHONY += modules_prepare 1301modules_prepare: prepare 1302 1303# Target to install modules 1304PHONY += modules_install 1305modules_install: _modinst_ _modinst_post 1306 1307PHONY += _modinst_ 1308_modinst_: 1309 @rm -rf $(MODLIB)/kernel 1310 @rm -f $(MODLIB)/source 1311 @mkdir -p $(MODLIB)/kernel 1312 @ln -s $(abspath $(srctree)) $(MODLIB)/source 1313 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1314 rm -f $(MODLIB)/build ; \ 1315 ln -s $(CURDIR) $(MODLIB)/build ; \ 1316 fi 1317 @cp -f $(objtree)/modules.order $(MODLIB)/ 1318 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1319 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1320 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1321 1322# This depmod is only for convenience to give the initial 1323# boot a modules.dep even before / is mounted read-write. However the 1324# boot script depmod is the master version. 1325PHONY += _modinst_post 1326_modinst_post: _modinst_ 1327 $(call cmd,depmod) 1328 1329ifeq ($(CONFIG_MODULE_SIG), y) 1330PHONY += modules_sign 1331modules_sign: 1332 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1333endif 1334 1335else # CONFIG_MODULES 1336 1337# Modules not configured 1338# --------------------------------------------------------------------------- 1339 1340PHONY += modules modules_install 1341modules modules_install: 1342 @echo >&2 1343 @echo >&2 "The present kernel configuration has modules disabled." 1344 @echo >&2 "Type 'make config' and enable loadable module support." 1345 @echo >&2 "Then build a kernel with module support enabled." 1346 @echo >&2 1347 @exit 1 1348 1349endif # CONFIG_MODULES 1350 1351### 1352# Cleaning is done on three levels. 1353# make clean Delete most generated files 1354# Leave enough to build external modules 1355# make mrproper Delete the current configuration, and all generated files 1356# make distclean Remove editor backup files, patch leftover files and the like 1357 1358# Directories & files removed with 'make clean' 1359CLEAN_DIRS += $(MODVERDIR) include/ksym 1360CLEAN_FILES += modules.builtin.modinfo 1361 1362# Directories & files removed with 'make mrproper' 1363MRPROPER_DIRS += include/config usr/include include/generated \ 1364 arch/$(SRCARCH)/include/generated .tmp_objdiff 1365MRPROPER_FILES += .config .config.old .version \ 1366 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1367 signing_key.pem signing_key.priv signing_key.x509 \ 1368 x509.genkey extra_certificates signing_key.x509.keyid \ 1369 signing_key.x509.signer vmlinux-gdb.py 1370 1371# clean - Delete most, but leave enough to build external modules 1372# 1373clean: rm-dirs := $(CLEAN_DIRS) 1374clean: rm-files := $(CLEAN_FILES) 1375clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs)) 1376 1377PHONY += $(clean-dirs) clean archclean vmlinuxclean 1378$(clean-dirs): 1379 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1380 1381vmlinuxclean: 1382 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1383 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1384 1385clean: archclean vmlinuxclean 1386 1387# mrproper - Delete all generated files, including .config 1388# 1389mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1390mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1391mrproper-dirs := $(addprefix _mrproper_,scripts) 1392 1393PHONY += $(mrproper-dirs) mrproper 1394$(mrproper-dirs): 1395 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1396 1397mrproper: clean $(mrproper-dirs) 1398 $(call cmd,rmdirs) 1399 $(call cmd,rmfiles) 1400 1401# distclean 1402# 1403PHONY += distclean 1404 1405distclean: mrproper 1406 @find $(srctree) $(RCS_FIND_IGNORE) \ 1407 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1408 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1409 -o -name 'core' \) \ 1410 -type f -print | xargs rm -f 1411 1412 1413# Packaging of the kernel to various formats 1414# --------------------------------------------------------------------------- 1415package-dir := scripts/package 1416 1417%src-pkg: FORCE 1418 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1419%pkg: include/config/kernel.release FORCE 1420 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1421 1422 1423# Brief documentation of the typical targets used 1424# --------------------------------------------------------------------------- 1425 1426boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1427boards := $(sort $(notdir $(boards))) 1428board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1429board-dirs := $(sort $(notdir $(board-dirs:/=))) 1430 1431PHONY += help 1432help: 1433 @echo 'Cleaning targets:' 1434 @echo ' clean - Remove most generated files but keep the config and' 1435 @echo ' enough build support to build external modules' 1436 @echo ' mrproper - Remove all generated files + config + various backup files' 1437 @echo ' distclean - mrproper + remove editor backup and patch files' 1438 @echo '' 1439 @echo 'Configuration targets:' 1440 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1441 @echo '' 1442 @echo 'Other generic targets:' 1443 @echo ' all - Build all targets marked with [*]' 1444 @echo '* vmlinux - Build the bare kernel' 1445 @echo '* modules - Build all modules' 1446 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1447 @echo ' dir/ - Build all files in dir and below' 1448 @echo ' dir/file.[ois] - Build specified target only' 1449 @echo ' dir/file.ll - Build the LLVM assembly file' 1450 @echo ' (requires compiler support for LLVM assembly generation)' 1451 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1452 @echo ' (requires a recent binutils and recent build (System.map))' 1453 @echo ' dir/file.ko - Build module including final link' 1454 @echo ' modules_prepare - Set up for building external modules' 1455 @echo ' tags/TAGS - Generate tags file for editors' 1456 @echo ' cscope - Generate cscope index' 1457 @echo ' gtags - Generate GNU GLOBAL index' 1458 @echo ' kernelrelease - Output the release version string (use with make -s)' 1459 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1460 @echo ' image_name - Output the image name (use with make -s)' 1461 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1462 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1463 echo '' 1464 @echo 'Static analysers:' 1465 @echo ' checkstack - Generate a list of stack hogs' 1466 @echo ' namespacecheck - Name space analysis on compiled kernel' 1467 @echo ' versioncheck - Sanity check on version.h usage' 1468 @echo ' includecheck - Check for duplicate included header files' 1469 @echo ' export_report - List the usages of all exported symbols' 1470 @echo ' headers_check - Sanity check on exported headers' 1471 @echo ' headerdep - Detect inclusion cycles in headers' 1472 @echo ' coccicheck - Check with Coccinelle' 1473 @echo '' 1474 @echo 'Kernel selftest:' 1475 @echo ' kselftest - Build and run kernel selftest (run as root)' 1476 @echo ' Build, install, and boot kernel before' 1477 @echo ' running kselftest on it' 1478 @echo ' kselftest-clean - Remove all generated kselftest files' 1479 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1480 @echo ' .config.' 1481 @echo '' 1482 @$(if $(dtstree), \ 1483 echo 'Devicetree:'; \ 1484 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1485 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1486 echo '') 1487 1488 @echo 'Userspace tools targets:' 1489 @echo ' use "make tools/help"' 1490 @echo ' or "cd tools; make help"' 1491 @echo '' 1492 @echo 'Kernel packaging:' 1493 @$(MAKE) $(build)=$(package-dir) help 1494 @echo '' 1495 @echo 'Documentation targets:' 1496 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1497 @echo '' 1498 @echo 'Architecture specific targets ($(SRCARCH)):' 1499 @$(if $(archhelp),$(archhelp),\ 1500 echo ' No architecture specific help defined for $(SRCARCH)') 1501 @echo '' 1502 @$(if $(boards), \ 1503 $(foreach b, $(boards), \ 1504 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1505 echo '') 1506 @$(if $(board-dirs), \ 1507 $(foreach b, $(board-dirs), \ 1508 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1509 printf " %-16s - Show all of the above\\n" help-boards; \ 1510 echo '') 1511 1512 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1513 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1514 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1515 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' 1516 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1517 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1518 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1519 @echo ' 1: warnings which may be relevant and do not occur too often' 1520 @echo ' 2: warnings which occur quite often but may still be relevant' 1521 @echo ' 3: more obscure warnings, can most likely be ignored' 1522 @echo ' Multiple levels can be combined with W=12 or W=123' 1523 @echo '' 1524 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1525 @echo 'For further info see the ./README file' 1526 1527 1528help-board-dirs := $(addprefix help-,$(board-dirs)) 1529 1530help-boards: $(help-board-dirs) 1531 1532boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1533 1534$(help-board-dirs): help-%: 1535 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1536 @$(if $(boards-per-dir), \ 1537 $(foreach b, $(boards-per-dir), \ 1538 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1539 echo '') 1540 1541 1542# Documentation targets 1543# --------------------------------------------------------------------------- 1544DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1545 linkcheckdocs dochelp refcheckdocs 1546PHONY += $(DOC_TARGETS) 1547$(DOC_TARGETS): scripts_basic FORCE 1548 $(Q)$(MAKE) $(build)=Documentation $@ 1549 1550# Misc 1551# --------------------------------------------------------------------------- 1552 1553PHONY += scripts_gdb 1554scripts_gdb: prepare 1555 $(Q)$(MAKE) $(build)=scripts/gdb 1556 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1557 1558ifdef CONFIG_GDB_SCRIPTS 1559all: scripts_gdb 1560endif 1561 1562else # KBUILD_EXTMOD 1563 1564### 1565# External module support. 1566# When building external modules the kernel used as basis is considered 1567# read-only, and no consistency checks are made and the make 1568# system is not used on the basis kernel. If updates are required 1569# in the basis kernel ordinary make commands (without M=...) must 1570# be used. 1571# 1572# The following are the only valid targets when building external 1573# modules. 1574# make M=dir clean Delete all automatically generated files 1575# make M=dir modules Make all modules in specified dir 1576# make M=dir Same as 'make M=dir modules' 1577# make M=dir modules_install 1578# Install the modules built in the module directory 1579# Assumes install directory is already created 1580 1581# We are always building modules 1582KBUILD_MODULES := 1 1583 1584PHONY += $(objtree)/Module.symvers 1585$(objtree)/Module.symvers: 1586 @test -e $(objtree)/Module.symvers || ( \ 1587 echo; \ 1588 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1589 echo " is missing; modules will have no dependencies and modversions."; \ 1590 echo ) 1591 1592module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1593PHONY += $(module-dirs) modules 1594$(module-dirs): prepare $(objtree)/Module.symvers 1595 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1596 1597modules: $(module-dirs) 1598 @$(kecho) ' Building modules, stage 2.'; 1599 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1600 1601PHONY += modules_install 1602modules_install: _emodinst_ _emodinst_post 1603 1604install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1605PHONY += _emodinst_ 1606_emodinst_: 1607 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1608 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1609 1610PHONY += _emodinst_post 1611_emodinst_post: _emodinst_ 1612 $(call cmd,depmod) 1613 1614clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1615 1616PHONY += $(clean-dirs) clean 1617$(clean-dirs): 1618 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1619 1620clean: rm-dirs := $(MODVERDIR) 1621clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1622 1623PHONY += help 1624help: 1625 @echo ' Building external modules.' 1626 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1627 @echo '' 1628 @echo ' modules - default target, build the module(s)' 1629 @echo ' modules_install - install the module' 1630 @echo ' clean - remove generated files in module directory only' 1631 @echo '' 1632 1633PHONY += prepare 1634prepare: 1635 $(cmd_crmodverdir) 1636endif # KBUILD_EXTMOD 1637 1638clean: $(clean-dirs) 1639 $(call cmd,rmdirs) 1640 $(call cmd,rmfiles) 1641 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1642 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1643 -o -name '*.ko.*' \ 1644 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1645 -o -name '*.dwo' -o -name '*.lst' \ 1646 -o -name '*.su' \ 1647 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1648 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1649 -o -name '*.asn1.[ch]' \ 1650 -o -name '*.symtypes' -o -name 'modules.order' \ 1651 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1652 -o -name '*.c.[012]*.*' \ 1653 -o -name '*.ll' \ 1654 -o -name '*.gcno' \) -type f -print | xargs rm -f 1655 1656# Generate tags for editors 1657# --------------------------------------------------------------------------- 1658quiet_cmd_tags = GEN $@ 1659 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1660 1661tags TAGS cscope gtags: FORCE 1662 $(call cmd,tags) 1663 1664# Scripts to check various things for consistency 1665# --------------------------------------------------------------------------- 1666 1667PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1668 1669includecheck: 1670 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1671 -name '*.[hcS]' -type f -print | sort \ 1672 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1673 1674versioncheck: 1675 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1676 -name '*.[hcS]' -type f -print | sort \ 1677 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1678 1679coccicheck: 1680 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1681 1682namespacecheck: 1683 $(PERL) $(srctree)/scripts/namespace.pl 1684 1685export_report: 1686 $(PERL) $(srctree)/scripts/export_report.pl 1687 1688PHONY += checkstack kernelrelease kernelversion image_name 1689 1690# UML needs a little special treatment here. It wants to use the host 1691# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1692# else wants $(ARCH), including people doing cross-builds, which means 1693# that $(SUBARCH) doesn't work here. 1694ifeq ($(ARCH), um) 1695CHECKSTACK_ARCH := $(SUBARCH) 1696else 1697CHECKSTACK_ARCH := $(ARCH) 1698endif 1699checkstack: 1700 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1701 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1702 1703kernelrelease: 1704 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1705 1706kernelversion: 1707 @echo $(KERNELVERSION) 1708 1709image_name: 1710 @echo $(KBUILD_IMAGE) 1711 1712# Clear a bunch of variables before executing the submake 1713 1714ifeq ($(quiet),silent_) 1715tools_silent=s 1716endif 1717 1718tools/: FORCE 1719 $(Q)mkdir -p $(objtree)/tools 1720 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ 1721 1722tools/%: FORCE 1723 $(Q)mkdir -p $(objtree)/tools 1724 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* 1725 1726# Single targets 1727# --------------------------------------------------------------------------- 1728# Single targets are compatible with: 1729# - build with mixed source and output 1730# - build with separate output dir 'make O=...' 1731# - external modules 1732# 1733# target-dir => where to store outputfile 1734# build-dir => directory in kernel source tree to use 1735 1736build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ 1737build-dir = $(patsubst %/,%,$(dir $(build-target))) 1738 1739%.i: prepare FORCE 1740 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1741%.ll: prepare FORCE 1742 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1743%.lst: prepare FORCE 1744 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1745%.o: prepare FORCE 1746 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1747%.s: prepare FORCE 1748 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1749%.symtypes: prepare FORCE 1750 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1751%.ko: %.o 1752 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1753 1754# Modules 1755PHONY += / 1756/: ./ 1757 1758# Make sure the latest headers are built for Documentation 1759Documentation/ samples/: headers_install 1760%/: prepare FORCE 1761 $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) 1762 1763# FIXME Should go into a make.lib or something 1764# =========================================================================== 1765 1766quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1767 cmd_rmdirs = rm -rf $(rm-dirs) 1768 1769quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1770 cmd_rmfiles = rm -f $(rm-files) 1771 1772# Run depmod only if we have System.map and depmod is executable 1773quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1774 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1775 $(KERNELRELEASE) 1776 1777# Create temporary dir for module support files 1778# clean it up only when building all modules 1779cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1780 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1781 1782# read saved command lines for existing targets 1783existing-targets := $(wildcard $(sort $(targets))) 1784 1785-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 1786 1787endif # ifeq ($(config-targets),1) 1788endif # ifeq ($(mixed-targets),1) 1789endif # need-sub-make 1790 1791PHONY += FORCE 1792FORCE: 1793 1794# Declare the contents of the PHONY variable as phony. We keep that 1795# information in a variable so we can use it in if_changed and friends. 1796.PHONY: $(PHONY) 1797