1# SPDX-License-Identifier: GPL-2.0 2VERSION = 5 3PATCHLEVEL = 3 4SUBLEVEL = 0 5EXTRAVERSION = -rc1 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 ) 216 $(warning If you are building an individual subdirectory) 217 $(warning in the kernel tree, you can do like this:) 218 $(warning $$ make path/to/dir/you/want/to/build/) 219 $(warning (Do not forget the trailing slash)) 220 $(warning ) 221 $(warning If you are building an external module,) 222 $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) 223 $(warning ==========================================) 224 KBUILD_EXTMOD ?= $(SUBDIRS) 225endif 226 227ifeq ("$(origin M)", "command line") 228 KBUILD_EXTMOD := $(M) 229endif 230 231export KBUILD_CHECKSRC KBUILD_EXTMOD 232 233ifeq ($(abs_srctree),$(abs_objtree)) 234 # building in the source tree 235 srctree := . 236 building_out_of_srctree := 237else 238 ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 239 # building in a subdirectory of the source tree 240 srctree := .. 241 else 242 srctree := $(abs_srctree) 243 endif 244 building_out_of_srctree := 1 245endif 246 247ifneq ($(KBUILD_ABS_SRCTREE),) 248srctree := $(abs_srctree) 249endif 250 251objtree := . 252VPATH := $(srctree) 253 254export building_out_of_srctree srctree objtree VPATH 255 256# To make sure we do not include .config for any of the *config targets 257# catch them early, and hand them over to scripts/kconfig/Makefile 258# It is allowed to specify more targets when calling make, including 259# mixing *config targets and build targets. 260# For example 'make oldconfig all'. 261# Detect when mixed targets is specified, and make a second invocation 262# of make so .config is not included in this case either (for *config). 263 264version_h := include/generated/uapi/linux/version.h 265old_version_h := include/linux/version.h 266 267clean-targets := %clean mrproper cleandocs 268no-dot-config-targets := $(clean-targets) \ 269 cscope gtags TAGS tags help% %docs check% coccicheck \ 270 $(version_h) headers headers_% archheaders archscripts \ 271 %asm-generic kernelversion %src-pkg 272no-sync-config-targets := $(no-dot-config-targets) install %install \ 273 kernelrelease 274 275config-targets := 0 276mixed-targets := 0 277dot-config := 1 278may-sync-config := 1 279 280ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 281 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 282 dot-config := 0 283 endif 284endif 285 286ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 287 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 288 may-sync-config := 0 289 endif 290endif 291 292ifneq ($(KBUILD_EXTMOD),) 293 may-sync-config := 0 294endif 295 296ifeq ($(KBUILD_EXTMOD),) 297 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 298 config-targets := 1 299 ifneq ($(words $(MAKECMDGOALS)),1) 300 mixed-targets := 1 301 endif 302 endif 303endif 304 305# For "make -j clean all", "make -j mrproper defconfig all", etc. 306ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 307 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 308 mixed-targets := 1 309 endif 310endif 311 312# install and modules_install need also be processed one by one 313ifneq ($(filter install,$(MAKECMDGOALS)),) 314 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 315 mixed-targets := 1 316 endif 317endif 318 319ifeq ($(mixed-targets),1) 320# =========================================================================== 321# We're called with mixed targets (*config and build targets). 322# Handle them one by one. 323 324PHONY += $(MAKECMDGOALS) __build_one_by_one 325 326$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 327 @: 328 329__build_one_by_one: 330 $(Q)set -e; \ 331 for i in $(MAKECMDGOALS); do \ 332 $(MAKE) -f $(srctree)/Makefile $$i; \ 333 done 334 335else 336 337include scripts/Kbuild.include 338 339# Read KERNELRELEASE from include/config/kernel.release (if it exists) 340KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 341KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 342export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 343 344include scripts/subarch.include 345 346# Cross compiling and selecting different set of gcc/bin-utils 347# --------------------------------------------------------------------------- 348# 349# When performing cross compilation for other architectures ARCH shall be set 350# to the target architecture. (See arch/* for the possibilities). 351# ARCH can be set during invocation of make: 352# make ARCH=ia64 353# Another way is to have ARCH set in the environment. 354# The default ARCH is the host where make is executed. 355 356# CROSS_COMPILE specify the prefix used for all executables used 357# during compilation. Only gcc and related bin-utils executables 358# are prefixed with $(CROSS_COMPILE). 359# CROSS_COMPILE can be set on the command line 360# make CROSS_COMPILE=ia64-linux- 361# Alternatively CROSS_COMPILE can be set in the environment. 362# Default value for CROSS_COMPILE is not to prefix executables 363# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 364ARCH ?= $(SUBARCH) 365 366# Architecture as present in compile.h 367UTS_MACHINE := $(ARCH) 368SRCARCH := $(ARCH) 369 370# Additional ARCH settings for x86 371ifeq ($(ARCH),i386) 372 SRCARCH := x86 373endif 374ifeq ($(ARCH),x86_64) 375 SRCARCH := x86 376endif 377 378# Additional ARCH settings for sparc 379ifeq ($(ARCH),sparc32) 380 SRCARCH := sparc 381endif 382ifeq ($(ARCH),sparc64) 383 SRCARCH := sparc 384endif 385 386# Additional ARCH settings for sh 387ifeq ($(ARCH),sh64) 388 SRCARCH := sh 389endif 390 391KCONFIG_CONFIG ?= .config 392export KCONFIG_CONFIG 393 394# SHELL used by kbuild 395CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 396 else if [ -x /bin/bash ]; then echo /bin/bash; \ 397 else echo sh; fi ; fi) 398 399HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 400HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 401HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 402 403HOSTCC = gcc 404HOSTCXX = g++ 405KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 406 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ 407 $(HOSTCFLAGS) 408KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 409KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 410KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 411 412# Make variables (CC, etc...) 413AS = $(CROSS_COMPILE)as 414LD = $(CROSS_COMPILE)ld 415CC = $(CROSS_COMPILE)gcc 416CPP = $(CC) -E 417AR = $(CROSS_COMPILE)ar 418NM = $(CROSS_COMPILE)nm 419STRIP = $(CROSS_COMPILE)strip 420OBJCOPY = $(CROSS_COMPILE)objcopy 421OBJDUMP = $(CROSS_COMPILE)objdump 422PAHOLE = pahole 423LEX = flex 424YACC = bison 425AWK = awk 426INSTALLKERNEL := installkernel 427DEPMOD = /sbin/depmod 428PERL = perl 429PYTHON = python 430PYTHON2 = python2 431PYTHON3 = python3 432CHECK = sparse 433 434CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 435 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 436NOSTDINC_FLAGS := 437CFLAGS_MODULE = 438AFLAGS_MODULE = 439LDFLAGS_MODULE = 440CFLAGS_KERNEL = 441AFLAGS_KERNEL = 442LDFLAGS_vmlinux = 443 444# Use USERINCLUDE when you must reference the UAPI directories only. 445USERINCLUDE := \ 446 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 447 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 448 -I$(srctree)/include/uapi \ 449 -I$(objtree)/include/generated/uapi \ 450 -include $(srctree)/include/linux/kconfig.h 451 452# Use LINUXINCLUDE when you must reference the include/ directory. 453# Needed to be compatible with the O= option 454LINUXINCLUDE := \ 455 -I$(srctree)/arch/$(SRCARCH)/include \ 456 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 457 $(if $(building_out_of_srctree),-I$(srctree)/include) \ 458 -I$(objtree)/include \ 459 $(USERINCLUDE) 460 461KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 462KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 463 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 464 -Werror=implicit-function-declaration -Werror=implicit-int \ 465 -Wno-format-security \ 466 -std=gnu89 467KBUILD_CPPFLAGS := -D__KERNEL__ 468KBUILD_AFLAGS_KERNEL := 469KBUILD_CFLAGS_KERNEL := 470KBUILD_AFLAGS_MODULE := -DMODULE 471KBUILD_CFLAGS_MODULE := -DMODULE 472KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 473KBUILD_LDFLAGS := 474GCC_PLUGINS_CFLAGS := 475 476export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 477export CPP AR NM STRIP OBJCOPY OBJDUMP PAHOLE KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS 478export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE 479export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 480 481export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 482export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 483export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 484export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 485export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 486export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 487export KBUILD_ARFLAGS 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: 513ifdef building_out_of_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=$(GCC_TOOLCHAIN) 529endif 530ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) 531CLANG_FLAGS += -no-integrated-as 532endif 533CLANG_FLAGS += -Werror=unknown-warning-option 534KBUILD_CFLAGS += $(CLANG_FLAGS) 535KBUILD_AFLAGS += $(CLANG_FLAGS) 536export CLANG_FLAGS 537endif 538 539# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 540# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 541# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 542# and from include/config/auto.conf.cmd to detect the compiler upgrade. 543CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 544 545ifeq ($(config-targets),1) 546# =========================================================================== 547# *config targets only - make sure prerequisites are updated, and descend 548# in scripts/kconfig to make the *config target 549 550# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 551# KBUILD_DEFCONFIG may point out an alternative default configuration 552# used for 'make defconfig' 553include arch/$(SRCARCH)/Makefile 554export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 555 556config: scripts_basic outputmakefile FORCE 557 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 558 559%config: scripts_basic outputmakefile FORCE 560 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 561 562else 563# =========================================================================== 564# Build targets only - this includes vmlinux, arch specific targets, clean 565# targets and others. In general all targets except *config targets. 566 567# If building an external module we do not care about the all: rule 568# but instead _all depend on modules 569PHONY += all 570ifeq ($(KBUILD_EXTMOD),) 571_all: all 572else 573_all: modules 574endif 575 576# Decide whether to build built-in, modular, or both. 577# Normally, just do built-in. 578 579KBUILD_MODULES := 580KBUILD_BUILTIN := 1 581 582# If we have only "make modules", don't compile built-in objects. 583# When we're building modules with modversions, we need to consider 584# the built-in objects during the descend as well, in order to 585# make sure the checksums are up to date before we record them. 586 587ifeq ($(MAKECMDGOALS),modules) 588 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 589endif 590 591# If we have "make <whatever> modules", compile modules 592# in addition to whatever we do anyway. 593# Just "make" or "make all" shall build modules as well 594 595ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 596 KBUILD_MODULES := 1 597endif 598 599ifeq ($(MAKECMDGOALS),) 600 KBUILD_MODULES := 1 601endif 602 603export KBUILD_MODULES KBUILD_BUILTIN 604 605ifeq ($(dot-config),1) 606include include/config/auto.conf 607endif 608 609ifeq ($(KBUILD_EXTMOD),) 610# Objects we will link into vmlinux / subdirs we need to visit 611init-y := init/ 612drivers-y := drivers/ sound/ 613drivers-$(CONFIG_SAMPLES) += samples/ 614drivers-$(CONFIG_KERNEL_HEADER_TEST) += include/ 615net-y := net/ 616libs-y := lib/ 617core-y := usr/ 618virt-y := virt/ 619endif # KBUILD_EXTMOD 620 621# The all: target is the default when no target is given on the 622# command line. 623# This allow a user to issue only 'make' to build a kernel including modules 624# Defaults to vmlinux, but the arch makefile usually adds further targets 625all: vmlinux 626 627CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 628 $(call cc-option,-fno-tree-loop-im) \ 629 $(call cc-disable-warning,maybe-uninitialized,) 630export CFLAGS_GCOV 631 632# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 633ifdef CONFIG_FUNCTION_TRACER 634 CC_FLAGS_FTRACE := -pg 635endif 636 637RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 638RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 639RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 640RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 641RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 642RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 643export RETPOLINE_CFLAGS 644export RETPOLINE_VDSO_CFLAGS 645 646# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 647# values of the respective KBUILD_* variables 648ARCH_CPPFLAGS := 649ARCH_AFLAGS := 650ARCH_CFLAGS := 651include arch/$(SRCARCH)/Makefile 652 653ifeq ($(dot-config),1) 654ifeq ($(may-sync-config),1) 655# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 656# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 657# because some architectures define CROSS_COMPILE there. 658include include/config/auto.conf.cmd 659 660$(KCONFIG_CONFIG): 661 @echo >&2 '***' 662 @echo >&2 '*** Configuration file "$@" not found!' 663 @echo >&2 '***' 664 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 665 @echo >&2 '*** "make menuconfig" or "make xconfig").' 666 @echo >&2 '***' 667 @/bin/false 668 669# The actual configuration files used during the build are stored in 670# include/generated/ and include/config/. Update them if .config is newer than 671# include/config/auto.conf (which mirrors .config). 672# 673# This exploits the 'multi-target pattern rule' trick. 674# The syncconfig should be executed only once to make all the targets. 675%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) 676 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 677else 678# External modules and some install targets need include/generated/autoconf.h 679# and include/config/auto.conf but do not care if they are up-to-date. 680# Use auto.conf to trigger the test 681PHONY += include/config/auto.conf 682 683include/config/auto.conf: 684 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 685 echo >&2; \ 686 echo >&2 " ERROR: Kernel configuration is invalid."; \ 687 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 688 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 689 echo >&2 ; \ 690 /bin/false) 691 692endif # may-sync-config 693endif # $(dot-config) 694 695KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 696KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 697KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 698KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 699KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 700 701ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 702KBUILD_CFLAGS += -Os 703else 704KBUILD_CFLAGS += -O2 705endif 706 707ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED 708KBUILD_CFLAGS += -Wno-maybe-uninitialized 709endif 710 711# Tell gcc to never replace conditional load with a non-conditional one 712KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 713 714include scripts/Makefile.kcov 715include scripts/Makefile.gcc-plugins 716 717ifdef CONFIG_READABLE_ASM 718# Disable optimizations that make assembler listings hard to read. 719# reorder blocks reorders the control in the function 720# ipa clone creates specialized cloned functions 721# partial inlining inlines only parts of functions 722KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 723 $(call cc-option,-fno-ipa-cp-clone,) \ 724 $(call cc-option,-fno-partial-inlining) 725endif 726 727ifneq ($(CONFIG_FRAME_WARN),0) 728KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 729endif 730 731stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 732stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 733stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 734 735KBUILD_CFLAGS += $(stackp-flags-y) 736 737ifdef CONFIG_CC_IS_CLANG 738KBUILD_CPPFLAGS += -Qunused-arguments 739KBUILD_CFLAGS += -Wno-format-invalid-specifier 740KBUILD_CFLAGS += -Wno-gnu 741# Quiet clang warning: comparison of unsigned expression < 0 is always false 742KBUILD_CFLAGS += -Wno-tautological-compare 743# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 744# source of a reference will be _MergedGlobals and not on of the whitelisted names. 745# See modpost pattern 2 746KBUILD_CFLAGS += -mno-global-merge 747else 748 749# These warnings generated too much noise in a regular build. 750# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 751KBUILD_CFLAGS += -Wno-unused-but-set-variable 752endif 753 754KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 755ifdef CONFIG_FRAME_POINTER 756KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 757else 758# Some targets (ARM with Thumb2, for example), can't be built with frame 759# pointers. For those, we don't have FUNCTION_TRACER automatically 760# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 761# incompatible with -fomit-frame-pointer with current GCC, so we don't use 762# -fomit-frame-pointer with FUNCTION_TRACER. 763ifndef CONFIG_FUNCTION_TRACER 764KBUILD_CFLAGS += -fomit-frame-pointer 765endif 766endif 767 768# Initialize all stack variables with a pattern, if desired. 769ifdef CONFIG_INIT_STACK_ALL 770KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 771endif 772 773DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 774 775ifdef CONFIG_DEBUG_INFO 776ifdef CONFIG_DEBUG_INFO_SPLIT 777DEBUG_CFLAGS += -gsplit-dwarf 778else 779DEBUG_CFLAGS += -g 780endif 781KBUILD_AFLAGS += -Wa,-gdwarf-2 782endif 783ifdef CONFIG_DEBUG_INFO_DWARF4 784DEBUG_CFLAGS += -gdwarf-4 785endif 786 787ifdef CONFIG_DEBUG_INFO_REDUCED 788DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 789 $(call cc-option,-fno-var-tracking) 790endif 791 792KBUILD_CFLAGS += $(DEBUG_CFLAGS) 793export DEBUG_CFLAGS 794 795ifdef CONFIG_FUNCTION_TRACER 796ifdef CONFIG_FTRACE_MCOUNT_RECORD 797 # gcc 5 supports generating the mcount tables directly 798 ifeq ($(call cc-option-yn,-mrecord-mcount),y) 799 CC_FLAGS_FTRACE += -mrecord-mcount 800 export CC_USING_RECORD_MCOUNT := 1 801 endif 802 ifdef CONFIG_HAVE_NOP_MCOUNT 803 ifeq ($(call cc-option-yn, -mnop-mcount),y) 804 CC_FLAGS_FTRACE += -mnop-mcount 805 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 806 endif 807 endif 808endif 809ifdef CONFIG_HAVE_FENTRY 810 ifeq ($(call cc-option-yn, -mfentry),y) 811 CC_FLAGS_FTRACE += -mfentry 812 CC_FLAGS_USING += -DCC_USING_FENTRY 813 endif 814endif 815export CC_FLAGS_FTRACE 816KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 817KBUILD_AFLAGS += $(CC_FLAGS_USING) 818ifdef CONFIG_DYNAMIC_FTRACE 819 ifdef CONFIG_HAVE_C_RECORDMCOUNT 820 BUILD_C_RECORDMCOUNT := y 821 export BUILD_C_RECORDMCOUNT 822 endif 823endif 824endif 825 826# We trigger additional mismatches with less inlining 827ifdef CONFIG_DEBUG_SECTION_MISMATCH 828KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 829endif 830 831ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 832KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 833LDFLAGS_vmlinux += --gc-sections 834endif 835 836ifdef CONFIG_LIVEPATCH 837KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 838endif 839 840# arch Makefile may override CC so keep this after arch Makefile is included 841NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 842 843# warn about C99 declaration after statement 844KBUILD_CFLAGS += -Wdeclaration-after-statement 845 846# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 847KBUILD_CFLAGS += -Wvla 848 849# disable pointer signed / unsigned warnings in gcc 4.0 850KBUILD_CFLAGS += -Wno-pointer-sign 851 852# disable stringop warnings in gcc 8+ 853KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 854 855# disable invalid "can't wrap" optimizations for signed / pointers 856KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 857 858# clang sets -fmerge-all-constants by default as optimization, but this 859# is non-conforming behavior for C and in fact breaks the kernel, so we 860# need to disable it here generally. 861KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 862 863# for gcc -fno-merge-all-constants disables everything, but it is fine 864# to have actual conforming behavior enabled. 865KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 866 867# Make sure -fstack-check isn't enabled (like gentoo apparently did) 868KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 869 870# conserve stack if available 871KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 872 873# Prohibit date/time macros, which would make the build non-deterministic 874KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 875 876# enforce correct pointer usage 877KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 878 879# Require designated initializers for all marked structures 880KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 881 882# change __FILE__ to the relative path from the srctree 883KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 884 885# ensure -fcf-protection is disabled when using retpoline as it is 886# incompatible with -mindirect-branch=thunk-extern 887ifdef CONFIG_RETPOLINE 888KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) 889endif 890 891# use the deterministic mode of AR if available 892KBUILD_ARFLAGS := $(call ar-option,D) 893 894include scripts/Makefile.kasan 895include scripts/Makefile.extrawarn 896include scripts/Makefile.ubsan 897 898# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 899# last assignments 900KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 901KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 902KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 903 904KBUILD_LDFLAGS_MODULE += --build-id 905LDFLAGS_vmlinux += --build-id 906 907ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 908LDFLAGS_vmlinux += $(call ld-option, -X,) 909endif 910 911# insure the checker run with the right endianness 912CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 913 914# the checker needs the correct machine size 915CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 916 917# Default kernel image to build when no specific target is given. 918# KBUILD_IMAGE may be overruled on the command line or 919# set in the environment 920# Also any assignments in arch/$(ARCH)/Makefile take precedence over 921# this default value 922export KBUILD_IMAGE ?= vmlinux 923 924# 925# INSTALL_PATH specifies where to place the updated kernel and system map 926# images. Default is /boot, but you can set it to other values 927export INSTALL_PATH ?= /boot 928 929# 930# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 931# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 932# an argument if needed. Otherwise it defaults to the kernel install path 933# 934export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 935 936# 937# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 938# relocations required by build roots. This is not defined in the 939# makefile but the argument can be passed to make if needed. 940# 941 942MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 943export MODLIB 944 945# 946# INSTALL_MOD_STRIP, if defined, will cause modules to be 947# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 948# the default option --strip-debug will be used. Otherwise, 949# INSTALL_MOD_STRIP value will be used as the options to the strip command. 950 951ifdef INSTALL_MOD_STRIP 952ifeq ($(INSTALL_MOD_STRIP),1) 953mod_strip_cmd = $(STRIP) --strip-debug 954else 955mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 956endif # INSTALL_MOD_STRIP=1 957else 958mod_strip_cmd = true 959endif # INSTALL_MOD_STRIP 960export mod_strip_cmd 961 962# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 963# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 964# or CONFIG_MODULE_COMPRESS_XZ. 965 966mod_compress_cmd = true 967ifdef CONFIG_MODULE_COMPRESS 968 ifdef CONFIG_MODULE_COMPRESS_GZIP 969 mod_compress_cmd = gzip -n -f 970 endif # CONFIG_MODULE_COMPRESS_GZIP 971 ifdef CONFIG_MODULE_COMPRESS_XZ 972 mod_compress_cmd = xz -f 973 endif # CONFIG_MODULE_COMPRESS_XZ 974endif # CONFIG_MODULE_COMPRESS 975export mod_compress_cmd 976 977ifdef CONFIG_MODULE_SIG_ALL 978$(eval $(call config_filename,MODULE_SIG_KEY)) 979 980mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 981else 982mod_sign_cmd = true 983endif 984export mod_sign_cmd 985 986HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 987 988ifdef CONFIG_STACK_VALIDATION 989 has_libelf := $(call try-run,\ 990 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 991 ifeq ($(has_libelf),1) 992 objtool_target := tools/objtool FORCE 993 else 994 SKIP_STACK_VALIDATION := 1 995 export SKIP_STACK_VALIDATION 996 endif 997endif 998 999PHONY += prepare0 1000 1001ifeq ($(KBUILD_EXTMOD),) 1002core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 1003 1004vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 1005 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 1006 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 1007 1008vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 1009 $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 1010 $(drivers-) $(net-) $(libs-) $(virt-)))) 1011 1012init-y := $(patsubst %/, %/built-in.a, $(init-y)) 1013core-y := $(patsubst %/, %/built-in.a, $(core-y)) 1014drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1015net-y := $(patsubst %/, %/built-in.a, $(net-y)) 1016libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 1017libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 1018virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 1019 1020# Externally visible symbols (used by link-vmlinux.sh) 1021export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1022 $(drivers-y) $(net-y) $(virt-y) 1023export KBUILD_VMLINUX_LIBS := $(libs-y1) 1024export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1025export LDFLAGS_vmlinux 1026# used by scripts/package/Makefile 1027export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 1028 1029vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 1030 1031# Recurse until adjust_autoksyms.sh is satisfied 1032PHONY += autoksyms_recursive 1033ifdef CONFIG_TRIM_UNUSED_KSYMS 1034autoksyms_recursive: $(vmlinux-deps) modules.order 1035 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1036 "$(MAKE) -f $(srctree)/Makefile vmlinux" 1037endif 1038 1039# For the kernel to actually contain only the needed exported symbols, 1040# we have to build modules as well to determine what those symbols are. 1041# (this can be evaluated only once include/config/auto.conf has been included) 1042ifdef CONFIG_TRIM_UNUSED_KSYMS 1043 KBUILD_MODULES := 1 1044endif 1045 1046autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1047 1048$(autoksyms_h): 1049 $(Q)mkdir -p $(dir $@) 1050 $(Q)touch $@ 1051 1052ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1053 1054# Final link of vmlinux with optional arch pass after final link 1055cmd_link-vmlinux = \ 1056 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1057 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1058 1059vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1060 +$(call if_changed,link-vmlinux) 1061 1062targets := vmlinux 1063 1064# The actual objects are generated when descending, 1065# make sure no implicit rule kicks in 1066$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 1067 1068# Handle descending into subdirectories listed in $(vmlinux-dirs) 1069# Preset locale variables to speed up the build process. Limit locale 1070# tweaks to this spot to avoid wrong language settings when running 1071# make menuconfig etc. 1072# Error messages still appears in the original language 1073 1074PHONY += $(vmlinux-dirs) 1075$(vmlinux-dirs): prepare 1076 $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 1077 1078filechk_kernel.release = \ 1079 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1080 1081# Store (new) KERNELRELEASE string in include/config/kernel.release 1082include/config/kernel.release: FORCE 1083 $(call filechk,kernel.release) 1084 1085# Additional helpers built in scripts/ 1086# Carefully list dependencies so we do not try to build scripts twice 1087# in parallel 1088PHONY += scripts 1089scripts: scripts_basic scripts_dtc 1090 $(Q)$(MAKE) $(build)=$(@) 1091 1092# Things we need to do before we recursively start building the kernel 1093# or the modules are listed in "prepare". 1094# A multi level approach is used. prepareN is processed before prepareN-1. 1095# archprepare is used in arch Makefiles and when processed asm symlink, 1096# version.h and scripts_basic is processed / created. 1097 1098PHONY += prepare archprepare prepare3 1099 1100# prepare3 is used to check if we are building in a separate output directory, 1101# and if so do: 1102# 1) Check that make has not been executed in the kernel src $(srctree) 1103prepare3: include/config/kernel.release 1104ifdef building_out_of_srctree 1105 @$(kecho) ' Using $(srctree) as source for kernel' 1106 $(Q)if [ -f $(srctree)/.config -o \ 1107 -d $(srctree)/include/config -o \ 1108 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 1109 echo >&2 " $(srctree) is not clean, please run 'make ARCH=$(ARCH) mrproper'"; \ 1110 echo >&2 " in the '$(srctree)' directory.";\ 1111 /bin/false; \ 1112 fi; 1113endif 1114 1115archprepare: archheaders archscripts scripts prepare3 outputmakefile \ 1116 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h 1117 1118prepare0: archprepare 1119 $(Q)$(MAKE) $(build)=scripts/mod 1120 $(Q)$(MAKE) $(build)=. 1121 1122# All the preparing.. 1123prepare: prepare0 prepare-objtool 1124 1125# Support for using generic headers in asm-generic 1126asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1127 1128PHONY += asm-generic uapi-asm-generic 1129asm-generic: uapi-asm-generic 1130 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1131 generic=include/asm-generic 1132uapi-asm-generic: 1133 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1134 generic=include/uapi/asm-generic 1135 1136PHONY += prepare-objtool 1137prepare-objtool: $(objtool_target) 1138ifeq ($(SKIP_STACK_VALIDATION),1) 1139ifdef CONFIG_UNWINDER_ORC 1140 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1141 @false 1142else 1143 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1144endif 1145endif 1146 1147# Generate some files 1148# --------------------------------------------------------------------------- 1149 1150# KERNELRELEASE can change from a few different places, meaning version.h 1151# needs to be updated, so this check is forced on all builds 1152 1153uts_len := 64 1154define filechk_utsrelease.h 1155 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1156 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1157 exit 1; \ 1158 fi; \ 1159 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1160endef 1161 1162define filechk_version.h 1163 echo \#define LINUX_VERSION_CODE $(shell \ 1164 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1165 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 1166endef 1167 1168$(version_h): FORCE 1169 $(call filechk,version.h) 1170 $(Q)rm -f $(old_version_h) 1171 1172include/generated/utsrelease.h: include/config/kernel.release FORCE 1173 $(call filechk,utsrelease.h) 1174 1175PHONY += headerdep 1176headerdep: 1177 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1178 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1179 1180# --------------------------------------------------------------------------- 1181# Kernel headers 1182 1183#Default location for installed headers 1184export INSTALL_HDR_PATH = $(objtree)/usr 1185 1186quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1187 cmd_headers_install = \ 1188 mkdir -p $(INSTALL_HDR_PATH); \ 1189 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1190 usr/include $(INSTALL_HDR_PATH) 1191 1192PHONY += headers_install 1193headers_install: headers 1194 $(call cmd,headers_install) 1195 1196PHONY += archheaders archscripts 1197 1198hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1199 1200PHONY += headers 1201headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 1202 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1203 $(error Headers not exportable for the $(SRCARCH) architecture)) 1204 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1205 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1206 1207PHONY += headers_check 1208headers_check: headers 1209 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 1210 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1 1211 1212ifdef CONFIG_HEADERS_INSTALL 1213prepare: headers 1214endif 1215 1216ifdef CONFIG_HEADERS_CHECK 1217all: headers_check 1218endif 1219 1220PHONY += scripts_unifdef 1221scripts_unifdef: scripts_basic 1222 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1223 1224# --------------------------------------------------------------------------- 1225# Kernel selftest 1226 1227PHONY += kselftest 1228kselftest: 1229 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1230 1231PHONY += kselftest-clean 1232kselftest-clean: 1233 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean 1234 1235PHONY += kselftest-merge 1236kselftest-merge: 1237 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1238 $(Q)find $(srctree)/tools/testing/selftests -name config | \ 1239 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 1240 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1241 1242# --------------------------------------------------------------------------- 1243# Devicetree files 1244 1245ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1246dtstree := arch/$(SRCARCH)/boot/dts 1247endif 1248 1249ifneq ($(dtstree),) 1250 1251%.dtb: prepare3 scripts_dtc 1252 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1253 1254PHONY += dtbs dtbs_install dt_binding_check 1255dtbs dtbs_check: prepare3 scripts_dtc 1256 $(Q)$(MAKE) $(build)=$(dtstree) 1257 1258dtbs_check: export CHECK_DTBS=1 1259dtbs_check: dt_binding_check 1260 1261dtbs_install: 1262 $(Q)$(MAKE) $(dtbinst)=$(dtstree) 1263 1264ifdef CONFIG_OF_EARLY_FLATTREE 1265all: dtbs 1266endif 1267 1268endif 1269 1270PHONY += scripts_dtc 1271scripts_dtc: scripts_basic 1272 $(Q)$(MAKE) $(build)=scripts/dtc 1273 1274dt_binding_check: scripts_dtc 1275 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1276 1277# --------------------------------------------------------------------------- 1278# Modules 1279 1280ifdef CONFIG_MODULES 1281 1282# By default, build modules as well 1283 1284all: modules 1285 1286# Build modules 1287# 1288# A module can be listed more than once in obj-m resulting in 1289# duplicate lines in modules.order files. Those are removed 1290# using awk while concatenating to the final file. 1291 1292PHONY += modules 1293modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin 1294 @$(kecho) ' Building modules, stage 2.'; 1295 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1296 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 1297 1298modules.order: $(vmlinux-dirs) 1299 $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@ 1300 1301modbuiltin-dirs := $(addprefix _modbuiltin_, $(vmlinux-dirs)) 1302 1303modules.builtin: $(modbuiltin-dirs) 1304 $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@ 1305 1306PHONY += $(modbuiltin-dirs) 1307# tristate.conf is not included from this Makefile. Add it as a prerequisite 1308# here to make it self-healing in case somebody accidentally removes it. 1309$(modbuiltin-dirs): include/config/tristate.conf 1310 $(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@) 1311 1312# Target to prepare building external modules 1313PHONY += modules_prepare 1314modules_prepare: prepare 1315 1316# Target to install modules 1317PHONY += modules_install 1318modules_install: _modinst_ _modinst_post 1319 1320PHONY += _modinst_ 1321_modinst_: 1322 @rm -rf $(MODLIB)/kernel 1323 @rm -f $(MODLIB)/source 1324 @mkdir -p $(MODLIB)/kernel 1325 @ln -s $(abspath $(srctree)) $(MODLIB)/source 1326 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1327 rm -f $(MODLIB)/build ; \ 1328 ln -s $(CURDIR) $(MODLIB)/build ; \ 1329 fi 1330 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order 1331 @sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin 1332 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1333 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1334 1335# This depmod is only for convenience to give the initial 1336# boot a modules.dep even before / is mounted read-write. However the 1337# boot script depmod is the master version. 1338PHONY += _modinst_post 1339_modinst_post: _modinst_ 1340 $(call cmd,depmod) 1341 1342ifeq ($(CONFIG_MODULE_SIG), y) 1343PHONY += modules_sign 1344modules_sign: 1345 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1346endif 1347 1348else # CONFIG_MODULES 1349 1350# Modules not configured 1351# --------------------------------------------------------------------------- 1352 1353PHONY += modules modules_install 1354modules modules_install: 1355 @echo >&2 1356 @echo >&2 "The present kernel configuration has modules disabled." 1357 @echo >&2 "Type 'make config' and enable loadable module support." 1358 @echo >&2 "Then build a kernel with module support enabled." 1359 @echo >&2 1360 @exit 1 1361 1362endif # CONFIG_MODULES 1363 1364### 1365# Cleaning is done on three levels. 1366# make clean Delete most generated files 1367# Leave enough to build external modules 1368# make mrproper Delete the current configuration, and all generated files 1369# make distclean Remove editor backup files, patch leftover files and the like 1370 1371# Directories & files removed with 'make clean' 1372CLEAN_DIRS += include/ksym 1373CLEAN_FILES += modules.builtin.modinfo 1374 1375# Directories & files removed with 'make mrproper' 1376MRPROPER_DIRS += include/config include/generated \ 1377 arch/$(SRCARCH)/include/generated .tmp_objdiff 1378MRPROPER_FILES += .config .config.old .version \ 1379 Module.symvers \ 1380 signing_key.pem signing_key.priv signing_key.x509 \ 1381 x509.genkey extra_certificates signing_key.x509.keyid \ 1382 signing_key.x509.signer vmlinux-gdb.py 1383 1384# Directories & files removed with 'make distclean' 1385DISTCLEAN_DIRS += 1386DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS 1387 1388# clean - Delete most, but leave enough to build external modules 1389# 1390clean: rm-dirs := $(CLEAN_DIRS) 1391clean: rm-files := $(CLEAN_FILES) 1392clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs)) 1393 1394PHONY += $(clean-dirs) clean archclean vmlinuxclean 1395$(clean-dirs): 1396 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1397 1398vmlinuxclean: 1399 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1400 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1401 1402clean: archclean vmlinuxclean 1403 1404# mrproper - Delete all generated files, including .config 1405# 1406mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1407mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1408mrproper-dirs := $(addprefix _mrproper_,scripts) 1409 1410PHONY += $(mrproper-dirs) mrproper 1411$(mrproper-dirs): 1412 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1413 1414mrproper: clean $(mrproper-dirs) 1415 $(call cmd,rmdirs) 1416 $(call cmd,rmfiles) 1417 1418# distclean 1419# 1420distclean: rm-dirs := $(wildcard $(DISTCLEAN_DIRS)) 1421distclean: rm-files := $(wildcard $(DISTCLEAN_FILES)) 1422 1423PHONY += distclean 1424 1425distclean: mrproper 1426 $(call cmd,rmdirs) 1427 $(call cmd,rmfiles) 1428 @find $(srctree) $(RCS_FIND_IGNORE) \ 1429 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1430 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1431 -o -name 'core' \) \ 1432 -type f -print | xargs rm -f 1433 1434 1435# Packaging of the kernel to various formats 1436# --------------------------------------------------------------------------- 1437package-dir := scripts/package 1438 1439%src-pkg: FORCE 1440 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1441%pkg: include/config/kernel.release FORCE 1442 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1443 1444 1445# Brief documentation of the typical targets used 1446# --------------------------------------------------------------------------- 1447 1448boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1449boards := $(sort $(notdir $(boards))) 1450board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1451board-dirs := $(sort $(notdir $(board-dirs:/=))) 1452 1453PHONY += help 1454help: 1455 @echo 'Cleaning targets:' 1456 @echo ' clean - Remove most generated files but keep the config and' 1457 @echo ' enough build support to build external modules' 1458 @echo ' mrproper - Remove all generated files + config + various backup files' 1459 @echo ' distclean - mrproper + remove editor backup and patch files' 1460 @echo '' 1461 @echo 'Configuration targets:' 1462 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1463 @echo '' 1464 @echo 'Other generic targets:' 1465 @echo ' all - Build all targets marked with [*]' 1466 @echo '* vmlinux - Build the bare kernel' 1467 @echo '* modules - Build all modules' 1468 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1469 @echo ' dir/ - Build all files in dir and below' 1470 @echo ' dir/file.[ois] - Build specified target only' 1471 @echo ' dir/file.ll - Build the LLVM assembly file' 1472 @echo ' (requires compiler support for LLVM assembly generation)' 1473 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1474 @echo ' (requires a recent binutils and recent build (System.map))' 1475 @echo ' dir/file.ko - Build module including final link' 1476 @echo ' modules_prepare - Set up for building external modules' 1477 @echo ' tags/TAGS - Generate tags file for editors' 1478 @echo ' cscope - Generate cscope index' 1479 @echo ' gtags - Generate GNU GLOBAL index' 1480 @echo ' kernelrelease - Output the release version string (use with make -s)' 1481 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1482 @echo ' image_name - Output the image name (use with make -s)' 1483 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1484 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1485 echo '' 1486 @echo 'Static analysers:' 1487 @echo ' checkstack - Generate a list of stack hogs' 1488 @echo ' namespacecheck - Name space analysis on compiled kernel' 1489 @echo ' versioncheck - Sanity check on version.h usage' 1490 @echo ' includecheck - Check for duplicate included header files' 1491 @echo ' export_report - List the usages of all exported symbols' 1492 @echo ' headers_check - Sanity check on exported headers' 1493 @echo ' headerdep - Detect inclusion cycles in headers' 1494 @echo ' coccicheck - Check with Coccinelle' 1495 @echo '' 1496 @echo 'Kernel selftest:' 1497 @echo ' kselftest - Build and run kernel selftest (run as root)' 1498 @echo ' Build, install, and boot kernel before' 1499 @echo ' running kselftest on it' 1500 @echo ' kselftest-clean - Remove all generated kselftest files' 1501 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1502 @echo ' .config.' 1503 @echo '' 1504 @$(if $(dtstree), \ 1505 echo 'Devicetree:'; \ 1506 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1507 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1508 echo '') 1509 1510 @echo 'Userspace tools targets:' 1511 @echo ' use "make tools/help"' 1512 @echo ' or "cd tools; make help"' 1513 @echo '' 1514 @echo 'Kernel packaging:' 1515 @$(MAKE) $(build)=$(package-dir) help 1516 @echo '' 1517 @echo 'Documentation targets:' 1518 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1519 @echo '' 1520 @echo 'Architecture specific targets ($(SRCARCH)):' 1521 @$(if $(archhelp),$(archhelp),\ 1522 echo ' No architecture specific help defined for $(SRCARCH)') 1523 @echo '' 1524 @$(if $(boards), \ 1525 $(foreach b, $(boards), \ 1526 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1527 echo '') 1528 @$(if $(board-dirs), \ 1529 $(foreach b, $(board-dirs), \ 1530 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1531 printf " %-16s - Show all of the above\\n" help-boards; \ 1532 echo '') 1533 1534 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1535 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1536 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1537 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' 1538 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1539 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1540 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1541 @echo ' 1: warnings which may be relevant and do not occur too often' 1542 @echo ' 2: warnings which occur quite often but may still be relevant' 1543 @echo ' 3: more obscure warnings, can most likely be ignored' 1544 @echo ' Multiple levels can be combined with W=12 or W=123' 1545 @echo '' 1546 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1547 @echo 'For further info see the ./README file' 1548 1549 1550help-board-dirs := $(addprefix help-,$(board-dirs)) 1551 1552help-boards: $(help-board-dirs) 1553 1554boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1555 1556$(help-board-dirs): help-%: 1557 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1558 @$(if $(boards-per-dir), \ 1559 $(foreach b, $(boards-per-dir), \ 1560 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1561 echo '') 1562 1563 1564# Documentation targets 1565# --------------------------------------------------------------------------- 1566DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1567 linkcheckdocs dochelp refcheckdocs 1568PHONY += $(DOC_TARGETS) 1569$(DOC_TARGETS): scripts_basic FORCE 1570 $(Q)$(MAKE) $(build)=Documentation $@ 1571 1572# Misc 1573# --------------------------------------------------------------------------- 1574 1575PHONY += scripts_gdb 1576scripts_gdb: prepare0 1577 $(Q)$(MAKE) $(build)=scripts/gdb 1578 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1579 1580ifdef CONFIG_GDB_SCRIPTS 1581all: scripts_gdb 1582endif 1583 1584else # KBUILD_EXTMOD 1585 1586### 1587# External module support. 1588# When building external modules the kernel used as basis is considered 1589# read-only, and no consistency checks are made and the make 1590# system is not used on the basis kernel. If updates are required 1591# in the basis kernel ordinary make commands (without M=...) must 1592# be used. 1593# 1594# The following are the only valid targets when building external 1595# modules. 1596# make M=dir clean Delete all automatically generated files 1597# make M=dir modules Make all modules in specified dir 1598# make M=dir Same as 'make M=dir modules' 1599# make M=dir modules_install 1600# Install the modules built in the module directory 1601# Assumes install directory is already created 1602 1603# We are always building modules 1604KBUILD_MODULES := 1 1605 1606PHONY += $(objtree)/Module.symvers 1607$(objtree)/Module.symvers: 1608 @test -e $(objtree)/Module.symvers || ( \ 1609 echo; \ 1610 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1611 echo " is missing; modules will have no dependencies and modversions."; \ 1612 echo ) 1613 1614module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1615PHONY += $(module-dirs) modules 1616$(module-dirs): prepare $(objtree)/Module.symvers 1617 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) need-modorder=1 1618 1619modules: $(module-dirs) 1620 @$(kecho) ' Building modules, stage 2.'; 1621 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1622 1623PHONY += modules_install 1624modules_install: _emodinst_ _emodinst_post 1625 1626install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1627PHONY += _emodinst_ 1628_emodinst_: 1629 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1630 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1631 1632PHONY += _emodinst_post 1633_emodinst_post: _emodinst_ 1634 $(call cmd,depmod) 1635 1636clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1637 1638PHONY += $(clean-dirs) clean 1639$(clean-dirs): 1640 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1641 1642clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1643 1644PHONY += help 1645help: 1646 @echo ' Building external modules.' 1647 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1648 @echo '' 1649 @echo ' modules - default target, build the module(s)' 1650 @echo ' modules_install - install the module' 1651 @echo ' clean - remove generated files in module directory only' 1652 @echo '' 1653 1654PHONY += prepare 1655endif # KBUILD_EXTMOD 1656 1657clean: $(clean-dirs) 1658 $(call cmd,rmdirs) 1659 $(call cmd,rmfiles) 1660 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1661 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1662 -o -name '*.ko.*' \ 1663 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1664 -o -name '*.dwo' -o -name '*.lst' \ 1665 -o -name '*.su' -o -name '*.mod' \ 1666 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1667 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1668 -o -name '*.asn1.[ch]' \ 1669 -o -name '*.symtypes' -o -name 'modules.order' \ 1670 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1671 -o -name '*.c.[012]*.*' \ 1672 -o -name '*.ll' \ 1673 -o -name '*.gcno' \) -type f -print | xargs rm -f 1674 1675# Generate tags for editors 1676# --------------------------------------------------------------------------- 1677quiet_cmd_tags = GEN $@ 1678 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1679 1680tags TAGS cscope gtags: FORCE 1681 $(call cmd,tags) 1682 1683# Scripts to check various things for consistency 1684# --------------------------------------------------------------------------- 1685 1686PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1687 1688includecheck: 1689 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1690 -name '*.[hcS]' -type f -print | sort \ 1691 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1692 1693versioncheck: 1694 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1695 -name '*.[hcS]' -type f -print | sort \ 1696 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1697 1698coccicheck: 1699 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1700 1701namespacecheck: 1702 $(PERL) $(srctree)/scripts/namespace.pl 1703 1704export_report: 1705 $(PERL) $(srctree)/scripts/export_report.pl 1706 1707PHONY += checkstack kernelrelease kernelversion image_name 1708 1709# UML needs a little special treatment here. It wants to use the host 1710# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1711# else wants $(ARCH), including people doing cross-builds, which means 1712# that $(SUBARCH) doesn't work here. 1713ifeq ($(ARCH), um) 1714CHECKSTACK_ARCH := $(SUBARCH) 1715else 1716CHECKSTACK_ARCH := $(ARCH) 1717endif 1718checkstack: 1719 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1720 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1721 1722kernelrelease: 1723 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1724 1725kernelversion: 1726 @echo $(KERNELVERSION) 1727 1728image_name: 1729 @echo $(KBUILD_IMAGE) 1730 1731# Clear a bunch of variables before executing the submake 1732 1733ifeq ($(quiet),silent_) 1734tools_silent=s 1735endif 1736 1737tools/: FORCE 1738 $(Q)mkdir -p $(objtree)/tools 1739 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ 1740 1741tools/%: FORCE 1742 $(Q)mkdir -p $(objtree)/tools 1743 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* 1744 1745# Single targets 1746# --------------------------------------------------------------------------- 1747# Single targets are compatible with: 1748# - build with mixed source and output 1749# - build with separate output dir 'make O=...' 1750# - external modules 1751# 1752# target-dir => where to store outputfile 1753# build-dir => directory in kernel source tree to use 1754 1755build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ 1756build-dir = $(patsubst %/,%,$(dir $(build-target))) 1757 1758%.i: prepare FORCE 1759 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1760%.ll: prepare FORCE 1761 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1762%.lst: prepare FORCE 1763 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1764%.o: prepare FORCE 1765 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1766%.s: prepare FORCE 1767 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1768%.symtypes: prepare FORCE 1769 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1770 1771# Modules 1772PHONY += / 1773/: ./ 1774 1775%/: prepare FORCE 1776 $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) 1777 1778# FIXME Should go into a make.lib or something 1779# =========================================================================== 1780 1781quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1782 cmd_rmdirs = rm -rf $(rm-dirs) 1783 1784quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1785 cmd_rmfiles = rm -f $(rm-files) 1786 1787# Run depmod only if we have System.map and depmod is executable 1788quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1789 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1790 $(KERNELRELEASE) 1791 1792# read saved command lines for existing targets 1793existing-targets := $(wildcard $(sort $(targets))) 1794 1795-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 1796 1797endif # ifeq ($(config-targets),1) 1798endif # ifeq ($(mixed-targets),1) 1799endif # need-sub-make 1800 1801PHONY += FORCE 1802FORCE: 1803 1804# Declare the contents of the PHONY variable as phony. We keep that 1805# information in a variable so we can use it in if_changed and friends. 1806.PHONY: $(PHONY) 1807