1VERSION = 4 2PATCHLEVEL = 8 3SUBLEVEL = 0 4EXTRAVERSION = 5NAME = Psychotic Stoned Sheep 6 7# *DOCUMENTATION* 8# To see a list of typical targets execute "make help" 9# More info can be located in ./README 10# Comments in this file are targeted only to the developer, do not 11# expect to learn how to build the kernel reading this file. 12 13# o Do not use make's built-in rules and variables 14# (this increases performance and avoids hard-to-debug behaviour); 15# o Look for make include files relative to root of kernel src 16MAKEFLAGS += -rR --include-dir=$(CURDIR) 17 18# Avoid funny character set dependencies 19unexport LC_ALL 20LC_COLLATE=C 21LC_NUMERIC=C 22export LC_COLLATE LC_NUMERIC 23 24# Avoid interference with shell env settings 25unexport GREP_OPTIONS 26 27# We are using a recursive build, so we need to do a little thinking 28# to get the ordering right. 29# 30# Most importantly: sub-Makefiles should only ever modify files in 31# their own directory. If in some directory we have a dependency on 32# a file in another dir (which doesn't happen often, but it's often 33# unavoidable when linking the built-in.o targets which finally 34# turn into vmlinux), we will call a sub make in that other dir, and 35# after that we are sure that everything which is in that other dir 36# is now up to date. 37# 38# The only cases where we need to modify files which have global 39# effects are thus separated out and done before the recursive 40# descending is started. They are now explicitly listed as the 41# prepare rule. 42 43# Beautify output 44# --------------------------------------------------------------------------- 45# 46# Normally, we echo the whole command before executing it. By making 47# that echo $($(quiet)$(cmd)), we now have the possibility to set 48# $(quiet) to choose other forms of output instead, e.g. 49# 50# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 51# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 52# 53# If $(quiet) is empty, the whole command will be printed. 54# If it is set to "quiet_", only the short version will be printed. 55# If it is set to "silent_", nothing will be printed at all, since 56# the variable $(silent_cmd_cc_o_c) doesn't exist. 57# 58# A simple variant is to prefix commands with $(Q) - that's useful 59# for commands that shall be hidden in non-verbose mode. 60# 61# $(Q)ln $@ :< 62# 63# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 64# If KBUILD_VERBOSE equals 1 then the above command is displayed. 65# 66# To put more focus on warnings, be less verbose as default 67# Use 'make V=1' to see the full commands 68 69ifeq ("$(origin V)", "command line") 70 KBUILD_VERBOSE = $(V) 71endif 72ifndef KBUILD_VERBOSE 73 KBUILD_VERBOSE = 0 74endif 75 76ifeq ($(KBUILD_VERBOSE),1) 77 quiet = 78 Q = 79else 80 quiet=quiet_ 81 Q = @ 82endif 83 84# If the user is running make -s (silent mode), suppress echoing of 85# commands 86 87ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 88ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) 89 quiet=silent_ 90endif 91else # make-3.8x 92ifneq ($(filter s% -s%,$(MAKEFLAGS)),) 93 quiet=silent_ 94endif 95endif 96 97export quiet Q KBUILD_VERBOSE 98 99# kbuild supports saving output files in a separate directory. 100# To locate output files in a separate directory two syntaxes are supported. 101# In both cases the working directory must be the root of the kernel src. 102# 1) O= 103# Use "make O=dir/to/store/output/files/" 104# 105# 2) Set KBUILD_OUTPUT 106# Set the environment variable KBUILD_OUTPUT to point to the directory 107# where the output files shall be placed. 108# export KBUILD_OUTPUT=dir/to/store/output/files/ 109# make 110# 111# The O= assignment takes precedence over the KBUILD_OUTPUT environment 112# variable. 113 114# KBUILD_SRC is set on invocation of make in OBJ directory 115# KBUILD_SRC is not intended to be used by the regular user (for now) 116ifeq ($(KBUILD_SRC),) 117 118# OK, Make called in directory where kernel src resides 119# Do we want to locate output files in a separate directory? 120ifeq ("$(origin O)", "command line") 121 KBUILD_OUTPUT := $(O) 122endif 123 124# That's our default target when none is given on the command line 125PHONY := _all 126_all: 127 128# Cancel implicit rules on top Makefile 129$(CURDIR)/Makefile Makefile: ; 130 131ifneq ($(words $(subst :, ,$(CURDIR))), 1) 132 $(error main directory cannot contain spaces nor colons) 133endif 134 135ifneq ($(KBUILD_OUTPUT),) 136# Invoke a second make in the output directory, passing relevant variables 137# check that the output directory actually exists 138saved-output := $(KBUILD_OUTPUT) 139KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ 140 && /bin/pwd) 141$(if $(KBUILD_OUTPUT),, \ 142 $(error failed to create output directory "$(saved-output)")) 143 144PHONY += $(MAKECMDGOALS) sub-make 145 146$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 147 @: 148 149sub-make: 150 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \ 151 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) 152 153# Leave processing to above invocation of make 154skip-makefile := 1 155endif # ifneq ($(KBUILD_OUTPUT),) 156endif # ifeq ($(KBUILD_SRC),) 157 158# We process the rest of the Makefile if this is the final invocation of make 159ifeq ($(skip-makefile),) 160 161# Do not print "Entering directory ...", 162# but we want to display it when entering to the output directory 163# so that IDEs/editors are able to understand relative filenames. 164MAKEFLAGS += --no-print-directory 165 166# Call a source code checker (by default, "sparse") as part of the 167# C compilation. 168# 169# Use 'make C=1' to enable checking of only re-compiled files. 170# Use 'make C=2' to enable checking of *all* source files, regardless 171# of whether they are re-compiled or not. 172# 173# See the file "Documentation/sparse.txt" for more details, including 174# where to get the "sparse" utility. 175 176ifeq ("$(origin C)", "command line") 177 KBUILD_CHECKSRC = $(C) 178endif 179ifndef KBUILD_CHECKSRC 180 KBUILD_CHECKSRC = 0 181endif 182 183# Use make M=dir to specify directory of external module to build 184# Old syntax make ... SUBDIRS=$PWD is still supported 185# Setting the environment variable KBUILD_EXTMOD take precedence 186ifdef SUBDIRS 187 KBUILD_EXTMOD ?= $(SUBDIRS) 188endif 189 190ifeq ("$(origin M)", "command line") 191 KBUILD_EXTMOD := $(M) 192endif 193 194# If building an external module we do not care about the all: rule 195# but instead _all depend on modules 196PHONY += all 197ifeq ($(KBUILD_EXTMOD),) 198_all: all 199else 200_all: modules 201endif 202 203ifeq ($(KBUILD_SRC),) 204 # building in the source tree 205 srctree := . 206else 207 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) 208 # building in a subdirectory of the source tree 209 srctree := .. 210 else 211 srctree := $(KBUILD_SRC) 212 endif 213endif 214objtree := . 215src := $(srctree) 216obj := $(objtree) 217 218VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 219 220export srctree objtree VPATH 221 222# SUBARCH tells the usermode build what the underlying arch is. That is set 223# first, and if a usermode build is happening, the "ARCH=um" on the command 224# line overrides the setting of ARCH below. If a native build is happening, 225# then ARCH is assigned, getting whatever value it gets normally, and 226# SUBARCH is subsequently ignored. 227 228SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \ 229 -e s/sun4u/sparc64/ \ 230 -e s/arm.*/arm/ -e s/sa110/arm/ \ 231 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 232 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 233 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) 234 235# Cross compiling and selecting different set of gcc/bin-utils 236# --------------------------------------------------------------------------- 237# 238# When performing cross compilation for other architectures ARCH shall be set 239# to the target architecture. (See arch/* for the possibilities). 240# ARCH can be set during invocation of make: 241# make ARCH=ia64 242# Another way is to have ARCH set in the environment. 243# The default ARCH is the host where make is executed. 244 245# CROSS_COMPILE specify the prefix used for all executables used 246# during compilation. Only gcc and related bin-utils executables 247# are prefixed with $(CROSS_COMPILE). 248# CROSS_COMPILE can be set on the command line 249# make CROSS_COMPILE=ia64-linux- 250# Alternatively CROSS_COMPILE can be set in the environment. 251# A third alternative is to store a setting in .config so that plain 252# "make" in the configured kernel build directory always uses that. 253# Default value for CROSS_COMPILE is not to prefix executables 254# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 255ARCH ?= $(SUBARCH) 256CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 257 258# Architecture as present in compile.h 259UTS_MACHINE := $(ARCH) 260SRCARCH := $(ARCH) 261 262# Additional ARCH settings for x86 263ifeq ($(ARCH),i386) 264 SRCARCH := x86 265endif 266ifeq ($(ARCH),x86_64) 267 SRCARCH := x86 268endif 269 270# Additional ARCH settings for sparc 271ifeq ($(ARCH),sparc32) 272 SRCARCH := sparc 273endif 274ifeq ($(ARCH),sparc64) 275 SRCARCH := sparc 276endif 277 278# Additional ARCH settings for sh 279ifeq ($(ARCH),sh64) 280 SRCARCH := sh 281endif 282 283# Additional ARCH settings for tile 284ifeq ($(ARCH),tilepro) 285 SRCARCH := tile 286endif 287ifeq ($(ARCH),tilegx) 288 SRCARCH := tile 289endif 290 291# Where to locate arch specific headers 292hdr-arch := $(SRCARCH) 293 294KCONFIG_CONFIG ?= .config 295export KCONFIG_CONFIG 296 297# SHELL used by kbuild 298CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 299 else if [ -x /bin/bash ]; then echo /bin/bash; \ 300 else echo sh; fi ; fi) 301 302HOSTCC = gcc 303HOSTCXX = g++ 304HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89 305HOSTCXXFLAGS = -O2 306 307ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1) 308HOSTCFLAGS += -Wno-unused-value -Wno-unused-parameter \ 309 -Wno-missing-field-initializers -fno-delete-null-pointer-checks 310endif 311 312# Decide whether to build built-in, modular, or both. 313# Normally, just do built-in. 314 315KBUILD_MODULES := 316KBUILD_BUILTIN := 1 317 318# If we have only "make modules", don't compile built-in objects. 319# When we're building modules with modversions, we need to consider 320# the built-in objects during the descend as well, in order to 321# make sure the checksums are up to date before we record them. 322 323ifeq ($(MAKECMDGOALS),modules) 324 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 325endif 326 327# If we have "make <whatever> modules", compile modules 328# in addition to whatever we do anyway. 329# Just "make" or "make all" shall build modules as well 330 331ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 332 KBUILD_MODULES := 1 333endif 334 335ifeq ($(MAKECMDGOALS),) 336 KBUILD_MODULES := 1 337endif 338 339export KBUILD_MODULES KBUILD_BUILTIN 340export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 341 342# We need some generic definitions (do not try to remake the file). 343scripts/Kbuild.include: ; 344include scripts/Kbuild.include 345 346# Make variables (CC, etc...) 347AS = $(CROSS_COMPILE)as 348LD = $(CROSS_COMPILE)ld 349CC = $(CROSS_COMPILE)gcc 350CPP = $(CC) -E 351AR = $(CROSS_COMPILE)ar 352NM = $(CROSS_COMPILE)nm 353STRIP = $(CROSS_COMPILE)strip 354OBJCOPY = $(CROSS_COMPILE)objcopy 355OBJDUMP = $(CROSS_COMPILE)objdump 356AWK = awk 357GENKSYMS = scripts/genksyms/genksyms 358INSTALLKERNEL := installkernel 359DEPMOD = /sbin/depmod 360PERL = perl 361PYTHON = python 362CHECK = sparse 363 364CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 365 -Wbitwise -Wno-return-void $(CF) 366NOSTDINC_FLAGS = 367CFLAGS_MODULE = 368AFLAGS_MODULE = 369LDFLAGS_MODULE = 370CFLAGS_KERNEL = 371AFLAGS_KERNEL = 372LDFLAGS_vmlinux = 373CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im 374CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,) 375 376 377# Use USERINCLUDE when you must reference the UAPI directories only. 378USERINCLUDE := \ 379 -I$(srctree)/arch/$(hdr-arch)/include/uapi \ 380 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ 381 -I$(srctree)/include/uapi \ 382 -I$(objtree)/include/generated/uapi \ 383 -include $(srctree)/include/linux/kconfig.h 384 385# Use LINUXINCLUDE when you must reference the include/ directory. 386# Needed to be compatible with the O= option 387LINUXINCLUDE := \ 388 -I$(srctree)/arch/$(hdr-arch)/include \ 389 -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \ 390 -I$(objtree)/arch/$(hdr-arch)/include/generated \ 391 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 392 -I$(objtree)/include 393 394LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE)) 395 396KBUILD_CPPFLAGS := -D__KERNEL__ 397 398KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 399 -fno-strict-aliasing -fno-common \ 400 -Werror-implicit-function-declaration \ 401 -Wno-format-security \ 402 -std=gnu89 403 404KBUILD_AFLAGS_KERNEL := 405KBUILD_CFLAGS_KERNEL := 406KBUILD_AFLAGS := -D__ASSEMBLY__ 407KBUILD_AFLAGS_MODULE := -DMODULE 408KBUILD_CFLAGS_MODULE := -DMODULE 409KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 410 411# Read KERNELRELEASE from include/config/kernel.release (if it exists) 412KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 413KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 414 415export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 416export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 417export CPP AR NM STRIP OBJCOPY OBJDUMP 418export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE 419export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 420 421export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 422export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN 423export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 424export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 425export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 426export KBUILD_ARFLAGS 427 428# When compiling out-of-tree modules, put MODVERDIR in the module 429# tree rather than in the kernel tree. The kernel tree might 430# even be read-only. 431export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 432 433# Files to ignore in find ... statements 434 435export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 436 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 437 -prune -o 438export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 439 --exclude CVS --exclude .pc --exclude .hg --exclude .git 440 441# =========================================================================== 442# Rules shared between *config targets and build targets 443 444# Basic helpers built in scripts/ 445PHONY += scripts_basic 446scripts_basic: 447 $(Q)$(MAKE) $(build)=scripts/basic 448 $(Q)rm -f .tmp_quiet_recordmcount 449 450# To avoid any implicit rule to kick in, define an empty command. 451scripts/basic/%: scripts_basic ; 452 453PHONY += outputmakefile 454# outputmakefile generates a Makefile in the output directory, if using a 455# separate output directory. This allows convenient use of make in the 456# output directory. 457outputmakefile: 458ifneq ($(KBUILD_SRC),) 459 $(Q)ln -fsn $(srctree) source 460 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 461 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 462endif 463 464# Support for using generic headers in asm-generic 465PHONY += asm-generic 466asm-generic: 467 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 468 src=asm obj=arch/$(SRCARCH)/include/generated/asm 469 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 470 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm 471 472# To make sure we do not include .config for any of the *config targets 473# catch them early, and hand them over to scripts/kconfig/Makefile 474# It is allowed to specify more targets when calling make, including 475# mixing *config targets and build targets. 476# For example 'make oldconfig all'. 477# Detect when mixed targets is specified, and make a second invocation 478# of make so .config is not included in this case either (for *config). 479 480version_h := include/generated/uapi/linux/version.h 481old_version_h := include/linux/version.h 482 483no-dot-config-targets := clean mrproper distclean \ 484 cscope gtags TAGS tags help% %docs check% coccicheck \ 485 $(version_h) headers_% archheaders archscripts \ 486 kernelversion %src-pkg 487 488config-targets := 0 489mixed-targets := 0 490dot-config := 1 491 492ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 493 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 494 dot-config := 0 495 endif 496endif 497 498ifeq ($(KBUILD_EXTMOD),) 499 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 500 config-targets := 1 501 ifneq ($(words $(MAKECMDGOALS)),1) 502 mixed-targets := 1 503 endif 504 endif 505endif 506# install and module_install need also be processed one by one 507ifneq ($(filter install,$(MAKECMDGOALS)),) 508 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 509 mixed-targets := 1 510 endif 511endif 512 513ifeq ($(mixed-targets),1) 514# =========================================================================== 515# We're called with mixed targets (*config and build targets). 516# Handle them one by one. 517 518PHONY += $(MAKECMDGOALS) __build_one_by_one 519 520$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 521 @: 522 523__build_one_by_one: 524 $(Q)set -e; \ 525 for i in $(MAKECMDGOALS); do \ 526 $(MAKE) -f $(srctree)/Makefile $$i; \ 527 done 528 529else 530ifeq ($(config-targets),1) 531# =========================================================================== 532# *config targets only - make sure prerequisites are updated, and descend 533# in scripts/kconfig to make the *config target 534 535# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 536# KBUILD_DEFCONFIG may point out an alternative default configuration 537# used for 'make defconfig' 538include arch/$(SRCARCH)/Makefile 539export KBUILD_DEFCONFIG KBUILD_KCONFIG 540 541config: scripts_basic outputmakefile FORCE 542 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 543 544%config: scripts_basic outputmakefile FORCE 545 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 546 547else 548# =========================================================================== 549# Build targets only - this includes vmlinux, arch specific targets, clean 550# targets and others. In general all targets except *config targets. 551 552ifeq ($(KBUILD_EXTMOD),) 553# Additional helpers built in scripts/ 554# Carefully list dependencies so we do not try to build scripts twice 555# in parallel 556PHONY += scripts 557scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ 558 asm-generic gcc-plugins 559 $(Q)$(MAKE) $(build)=$(@) 560 561# Objects we will link into vmlinux / subdirs we need to visit 562init-y := init/ 563drivers-y := drivers/ sound/ firmware/ 564net-y := net/ 565libs-y := lib/ 566core-y := usr/ 567virt-y := virt/ 568endif # KBUILD_EXTMOD 569 570ifeq ($(dot-config),1) 571# Read in config 572-include include/config/auto.conf 573 574ifeq ($(KBUILD_EXTMOD),) 575# Read in dependencies to all Kconfig* files, make sure to run 576# oldconfig if changes are detected. 577-include include/config/auto.conf.cmd 578 579# To avoid any implicit rule to kick in, define an empty command 580$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 581 582# If .config is newer than include/config/auto.conf, someone tinkered 583# with it and forgot to run make oldconfig. 584# if auto.conf.cmd is missing then we are probably in a cleaned tree so 585# we execute the config step to be sure to catch updated Kconfig files 586include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 587 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 588else 589# external modules needs include/generated/autoconf.h and include/config/auto.conf 590# but do not care if they are up-to-date. Use auto.conf to trigger the test 591PHONY += include/config/auto.conf 592 593include/config/auto.conf: 594 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 595 echo >&2; \ 596 echo >&2 " ERROR: Kernel configuration is invalid."; \ 597 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 598 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 599 echo >&2 ; \ 600 /bin/false) 601 602endif # KBUILD_EXTMOD 603 604else 605# Dummy target needed, because used as prerequisite 606include/config/auto.conf: ; 607endif # $(dot-config) 608 609# The all: target is the default when no target is given on the 610# command line. 611# This allow a user to issue only 'make' to build a kernel including modules 612# Defaults to vmlinux, but the arch makefile usually adds further targets 613all: vmlinux 614 615# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 616# values of the respective KBUILD_* variables 617ARCH_CPPFLAGS := 618ARCH_AFLAGS := 619ARCH_CFLAGS := 620include arch/$(SRCARCH)/Makefile 621 622KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 623KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) 624 625ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 626KBUILD_CFLAGS += -Os 627else 628ifdef CONFIG_PROFILE_ALL_BRANCHES 629KBUILD_CFLAGS += -O2 630else 631KBUILD_CFLAGS += -O2 632endif 633endif 634 635# Tell gcc to never replace conditional load with a non-conditional one 636KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 637 638include scripts/Makefile.gcc-plugins 639 640ifdef CONFIG_READABLE_ASM 641# Disable optimizations that make assembler listings hard to read. 642# reorder blocks reorders the control in the function 643# ipa clone creates specialized cloned functions 644# partial inlining inlines only parts of functions 645KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 646 $(call cc-option,-fno-ipa-cp-clone,) \ 647 $(call cc-option,-fno-partial-inlining) 648endif 649 650ifneq ($(CONFIG_FRAME_WARN),0) 651KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 652endif 653 654# This selects the stack protector compiler flag. Testing it is delayed 655# until after .config has been reprocessed, in the prepare-compiler-check 656# target. 657ifdef CONFIG_CC_STACKPROTECTOR_REGULAR 658 stackp-flag := -fstack-protector 659 stackp-name := REGULAR 660else 661ifdef CONFIG_CC_STACKPROTECTOR_STRONG 662 stackp-flag := -fstack-protector-strong 663 stackp-name := STRONG 664else 665 # Force off for distro compilers that enable stack protector by default. 666 stackp-flag := $(call cc-option, -fno-stack-protector) 667endif 668endif 669# Find arch-specific stack protector compiler sanity-checking script. 670ifdef CONFIG_CC_STACKPROTECTOR 671 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh 672 stackp-check := $(wildcard $(stackp-path)) 673endif 674KBUILD_CFLAGS += $(stackp-flag) 675 676ifeq ($(cc-name),clang) 677KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 678KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,) 679KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) 680KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 681KBUILD_CFLAGS += $(call cc-disable-warning, gnu) 682# Quiet clang warning: comparison of unsigned expression < 0 is always false 683KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 684# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 685# source of a reference will be _MergedGlobals and not on of the whitelisted names. 686# See modpost pattern 2 687KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 688KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 689else 690 691# These warnings generated too much noise in a regular build. 692# Use make W=1 to enable them (see scripts/Makefile.build) 693KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 694KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 695endif 696 697ifdef CONFIG_FRAME_POINTER 698KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 699else 700# Some targets (ARM with Thumb2, for example), can't be built with frame 701# pointers. For those, we don't have FUNCTION_TRACER automatically 702# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 703# incompatible with -fomit-frame-pointer with current GCC, so we don't use 704# -fomit-frame-pointer with FUNCTION_TRACER. 705ifndef CONFIG_FUNCTION_TRACER 706KBUILD_CFLAGS += -fomit-frame-pointer 707endif 708endif 709 710KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 711 712ifdef CONFIG_DEBUG_INFO 713ifdef CONFIG_DEBUG_INFO_SPLIT 714KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 715else 716KBUILD_CFLAGS += -g 717endif 718KBUILD_AFLAGS += -Wa,-gdwarf-2 719endif 720ifdef CONFIG_DEBUG_INFO_DWARF4 721KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 722endif 723 724ifdef CONFIG_DEBUG_INFO_REDUCED 725KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 726 $(call cc-option,-fno-var-tracking) 727endif 728 729ifdef CONFIG_FUNCTION_TRACER 730ifndef CC_FLAGS_FTRACE 731CC_FLAGS_FTRACE := -pg 732endif 733export CC_FLAGS_FTRACE 734ifdef CONFIG_HAVE_FENTRY 735CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 736endif 737KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) 738KBUILD_AFLAGS += $(CC_USING_FENTRY) 739ifdef CONFIG_DYNAMIC_FTRACE 740 ifdef CONFIG_HAVE_C_RECORDMCOUNT 741 BUILD_C_RECORDMCOUNT := y 742 export BUILD_C_RECORDMCOUNT 743 endif 744endif 745endif 746 747# We trigger additional mismatches with less inlining 748ifdef CONFIG_DEBUG_SECTION_MISMATCH 749KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 750endif 751 752# arch Makefile may override CC so keep this after arch Makefile is included 753NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 754CHECKFLAGS += $(NOSTDINC_FLAGS) 755 756# warn about C99 declaration after statement 757KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 758 759# disable pointer signed / unsigned warnings in gcc 4.0 760KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 761 762# disable invalid "can't wrap" optimizations for signed / pointers 763KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 764 765# conserve stack if available 766KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 767 768# disallow errors like 'EXPORT_GPL(foo);' with missing header 769KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 770 771# require functions to have arguments in prototypes, not empty 'int foo()' 772KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 773 774# Prohibit date/time macros, which would make the build non-deterministic 775KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 776 777# enforce correct pointer usage 778KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 779 780# use the deterministic mode of AR if available 781KBUILD_ARFLAGS := $(call ar-option,D) 782 783# check for 'asm goto' 784ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 785 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 786 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO 787endif 788 789include scripts/Makefile.kasan 790include scripts/Makefile.extrawarn 791include scripts/Makefile.ubsan 792 793# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 794# last assignments 795KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 796KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 797KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 798 799# Use --build-id when available. 800LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 801 $(call cc-ldoption, -Wl$(comma)--build-id,)) 802KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 803LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 804 805ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 806LDFLAGS_vmlinux += $(call ld-option, -X,) 807endif 808 809# Default kernel image to build when no specific target is given. 810# KBUILD_IMAGE may be overruled on the command line or 811# set in the environment 812# Also any assignments in arch/$(ARCH)/Makefile take precedence over 813# this default value 814export KBUILD_IMAGE ?= vmlinux 815 816# 817# INSTALL_PATH specifies where to place the updated kernel and system map 818# images. Default is /boot, but you can set it to other values 819export INSTALL_PATH ?= /boot 820 821# 822# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 823# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 824# an argument if needed. Otherwise it defaults to the kernel install path 825# 826export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 827 828# 829# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 830# relocations required by build roots. This is not defined in the 831# makefile but the argument can be passed to make if needed. 832# 833 834MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 835export MODLIB 836 837# 838# INSTALL_MOD_STRIP, if defined, will cause modules to be 839# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 840# the default option --strip-debug will be used. Otherwise, 841# INSTALL_MOD_STRIP value will be used as the options to the strip command. 842 843ifdef INSTALL_MOD_STRIP 844ifeq ($(INSTALL_MOD_STRIP),1) 845mod_strip_cmd = $(STRIP) --strip-debug 846else 847mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 848endif # INSTALL_MOD_STRIP=1 849else 850mod_strip_cmd = true 851endif # INSTALL_MOD_STRIP 852export mod_strip_cmd 853 854# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 855# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 856# or CONFIG_MODULE_COMPRESS_XZ. 857 858mod_compress_cmd = true 859ifdef CONFIG_MODULE_COMPRESS 860 ifdef CONFIG_MODULE_COMPRESS_GZIP 861 mod_compress_cmd = gzip -n -f 862 endif # CONFIG_MODULE_COMPRESS_GZIP 863 ifdef CONFIG_MODULE_COMPRESS_XZ 864 mod_compress_cmd = xz -f 865 endif # CONFIG_MODULE_COMPRESS_XZ 866endif # CONFIG_MODULE_COMPRESS 867export mod_compress_cmd 868 869# Select initial ramdisk compression format, default is gzip(1). 870# This shall be used by the dracut(8) tool while creating an initramfs image. 871# 872INITRD_COMPRESS-y := gzip 873INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 874INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma 875INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz 876INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo 877INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 878# do not export INITRD_COMPRESS, since we didn't actually 879# choose a sane default compression above. 880# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 881 882ifdef CONFIG_MODULE_SIG_ALL 883$(eval $(call config_filename,MODULE_SIG_KEY)) 884 885mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 886else 887mod_sign_cmd = true 888endif 889export mod_sign_cmd 890 891 892ifeq ($(KBUILD_EXTMOD),) 893core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 894 895vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 896 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 897 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 898 899vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 900 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) 901 902init-y := $(patsubst %/, %/built-in.o, $(init-y)) 903core-y := $(patsubst %/, %/built-in.o, $(core-y)) 904drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 905net-y := $(patsubst %/, %/built-in.o, $(net-y)) 906libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 907libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 908libs-y := $(libs-y1) $(libs-y2) 909virt-y := $(patsubst %/, %/built-in.o, $(virt-y)) 910 911# Externally visible symbols (used by link-vmlinux.sh) 912export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 913export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y) 914export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 915export LDFLAGS_vmlinux 916# used by scripts/pacmage/Makefile 917export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) 918 919vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) 920 921# Include targets which we want to execute sequentially if the rest of the 922# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be 923# evaluated more than once. 924PHONY += vmlinux_prereq 925vmlinux_prereq: $(vmlinux-deps) FORCE 926ifdef CONFIG_HEADERS_CHECK 927 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 928endif 929ifdef CONFIG_BUILD_DOCSRC 930 $(Q)$(MAKE) $(build)=Documentation 931endif 932ifdef CONFIG_GDB_SCRIPTS 933 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py 934endif 935ifdef CONFIG_TRIM_UNUSED_KSYMS 936 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 937 "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile vmlinux_prereq" 938endif 939 940# standalone target for easier testing 941include/generated/autoksyms.h: FORCE 942 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true 943 944# Final link of vmlinux 945 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) 946quiet_cmd_link-vmlinux = LINK $@ 947 948vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE 949 +$(call if_changed,link-vmlinux) 950 951# Build samples along the rest of the kernel 952ifdef CONFIG_SAMPLES 953vmlinux-dirs += samples 954endif 955 956# The actual objects are generated when descending, 957# make sure no implicit rule kicks in 958$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 959 960# Handle descending into subdirectories listed in $(vmlinux-dirs) 961# Preset locale variables to speed up the build process. Limit locale 962# tweaks to this spot to avoid wrong language settings when running 963# make menuconfig etc. 964# Error messages still appears in the original language 965 966PHONY += $(vmlinux-dirs) 967$(vmlinux-dirs): prepare scripts 968 $(Q)$(MAKE) $(build)=$@ 969 970define filechk_kernel.release 971 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 972endef 973 974# Store (new) KERNELRELEASE string in include/config/kernel.release 975include/config/kernel.release: include/config/auto.conf FORCE 976 $(call filechk,kernel.release) 977 978 979# Things we need to do before we recursively start building the kernel 980# or the modules are listed in "prepare". 981# A multi level approach is used. prepareN is processed before prepareN-1. 982# archprepare is used in arch Makefiles and when processed asm symlink, 983# version.h and scripts_basic is processed / created. 984 985# Listed in dependency order 986PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 987 988# prepare3 is used to check if we are building in a separate output directory, 989# and if so do: 990# 1) Check that make has not been executed in the kernel src $(srctree) 991prepare3: include/config/kernel.release 992ifneq ($(KBUILD_SRC),) 993 @$(kecho) ' Using $(srctree) as source for kernel' 994 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 995 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 996 echo >&2 " in the '$(srctree)' directory.";\ 997 /bin/false; \ 998 fi; 999endif 1000 1001# prepare2 creates a makefile if using a separate output directory. 1002# From this point forward, .config has been reprocessed, so any rules 1003# that need to depend on updated CONFIG_* values can be checked here. 1004prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic 1005 1006prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ 1007 include/config/auto.conf 1008 $(cmd_crmodverdir) 1009 $(Q)test -e include/generated/autoksyms.h || \ 1010 touch include/generated/autoksyms.h 1011 1012archprepare: archheaders archscripts prepare1 scripts_basic 1013 1014prepare0: archprepare gcc-plugins 1015 $(Q)$(MAKE) $(build)=. 1016 1017# All the preparing.. 1018prepare: prepare0 prepare-objtool 1019 1020ifdef CONFIG_STACK_VALIDATION 1021 has_libelf := $(call try-run,\ 1022 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) 1023 ifeq ($(has_libelf),1) 1024 objtool_target := tools/objtool FORCE 1025 else 1026 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel") 1027 SKIP_STACK_VALIDATION := 1 1028 export SKIP_STACK_VALIDATION 1029 endif 1030endif 1031 1032PHONY += prepare-objtool 1033prepare-objtool: $(objtool_target) 1034 1035# Check for CONFIG flags that require compiler support. Abort the build 1036# after .config has been processed, but before the kernel build starts. 1037# 1038# For security-sensitive CONFIG options, we don't want to fallback and/or 1039# silently change which compiler flags will be used, since that leads to 1040# producing kernels with different security feature characteristics 1041# depending on the compiler used. (For example, "But I selected 1042# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") 1043PHONY += prepare-compiler-check 1044prepare-compiler-check: FORCE 1045# Make sure compiler supports requested stack protector flag. 1046ifdef stackp-name 1047 ifeq ($(call cc-option, $(stackp-flag)),) 1048 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1049 $(stackp-flag) not supported by compiler >&2 && exit 1 1050 endif 1051endif 1052# Make sure compiler does not have buggy stack-protector support. 1053ifdef stackp-check 1054 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) 1055 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1056 $(stackp-flag) available but compiler is broken >&2 && exit 1 1057 endif 1058endif 1059 @: 1060 1061# Generate some files 1062# --------------------------------------------------------------------------- 1063 1064# KERNELRELEASE can change from a few different places, meaning version.h 1065# needs to be updated, so this check is forced on all builds 1066 1067uts_len := 64 1068define filechk_utsrelease.h 1069 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1070 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1071 exit 1; \ 1072 fi; \ 1073 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1074endef 1075 1076define filechk_version.h 1077 (echo \#define LINUX_VERSION_CODE $(shell \ 1078 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1079 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1080endef 1081 1082$(version_h): $(srctree)/Makefile FORCE 1083 $(call filechk,version.h) 1084 $(Q)rm -f $(old_version_h) 1085 1086include/generated/utsrelease.h: include/config/kernel.release FORCE 1087 $(call filechk,utsrelease.h) 1088 1089PHONY += headerdep 1090headerdep: 1091 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1092 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1093 1094# --------------------------------------------------------------------------- 1095# Firmware install 1096INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1097export INSTALL_FW_PATH 1098 1099PHONY += firmware_install 1100firmware_install: 1101 @mkdir -p $(objtree)/firmware 1102 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1103 1104# --------------------------------------------------------------------------- 1105# Kernel headers 1106 1107#Default location for installed headers 1108export INSTALL_HDR_PATH = $(objtree)/usr 1109 1110# If we do an all arch process set dst to asm-$(hdr-arch) 1111hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1112 1113PHONY += archheaders 1114archheaders: 1115 1116PHONY += archscripts 1117archscripts: 1118 1119PHONY += __headers 1120__headers: $(version_h) scripts_basic asm-generic archheaders archscripts 1121 $(Q)$(MAKE) $(build)=scripts build_unifdef 1122 1123PHONY += headers_install_all 1124headers_install_all: 1125 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1126 1127PHONY += headers_install 1128headers_install: __headers 1129 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ 1130 $(error Headers not exportable for the $(SRCARCH) architecture)) 1131 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1132 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) 1133 1134PHONY += headers_check_all 1135headers_check_all: headers_install_all 1136 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1137 1138PHONY += headers_check 1139headers_check: headers_install 1140 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 1141 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 1142 1143# --------------------------------------------------------------------------- 1144# Kernel selftest 1145 1146PHONY += kselftest 1147kselftest: 1148 $(Q)$(MAKE) -C tools/testing/selftests run_tests 1149 1150kselftest-clean: 1151 $(Q)$(MAKE) -C tools/testing/selftests clean 1152 1153PHONY += kselftest-merge 1154kselftest-merge: 1155 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1156 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 1157 -m $(objtree)/.config \ 1158 $(srctree)/tools/testing/selftests/*/config 1159 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1160 1161# --------------------------------------------------------------------------- 1162# Modules 1163 1164ifdef CONFIG_MODULES 1165 1166# By default, build modules as well 1167 1168all: modules 1169 1170# Build modules 1171# 1172# A module can be listed more than once in obj-m resulting in 1173# duplicate lines in modules.order files. Those are removed 1174# using awk while concatenating to the final file. 1175 1176PHONY += modules 1177modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1178 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1179 @$(kecho) ' Building modules, stage 2.'; 1180 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1181 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1182 1183modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1184 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1185 1186%/modules.builtin: include/config/auto.conf 1187 $(Q)$(MAKE) $(modbuiltin)=$* 1188 1189 1190# Target to prepare building external modules 1191PHONY += modules_prepare 1192modules_prepare: prepare scripts 1193 1194# Target to install modules 1195PHONY += modules_install 1196modules_install: _modinst_ _modinst_post 1197 1198PHONY += _modinst_ 1199_modinst_: 1200 @rm -rf $(MODLIB)/kernel 1201 @rm -f $(MODLIB)/source 1202 @mkdir -p $(MODLIB)/kernel 1203 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source 1204 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1205 rm -f $(MODLIB)/build ; \ 1206 ln -s $(CURDIR) $(MODLIB)/build ; \ 1207 fi 1208 @cp -f $(objtree)/modules.order $(MODLIB)/ 1209 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1210 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1211 1212# This depmod is only for convenience to give the initial 1213# boot a modules.dep even before / is mounted read-write. However the 1214# boot script depmod is the master version. 1215PHONY += _modinst_post 1216_modinst_post: _modinst_ 1217 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1218 $(call cmd,depmod) 1219 1220ifeq ($(CONFIG_MODULE_SIG), y) 1221PHONY += modules_sign 1222modules_sign: 1223 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1224endif 1225 1226else # CONFIG_MODULES 1227 1228# Modules not configured 1229# --------------------------------------------------------------------------- 1230 1231PHONY += modules modules_install 1232modules modules_install: 1233 @echo >&2 1234 @echo >&2 "The present kernel configuration has modules disabled." 1235 @echo >&2 "Type 'make config' and enable loadable module support." 1236 @echo >&2 "Then build a kernel with module support enabled." 1237 @echo >&2 1238 @exit 1 1239 1240endif # CONFIG_MODULES 1241 1242### 1243# Cleaning is done on three levels. 1244# make clean Delete most generated files 1245# Leave enough to build external modules 1246# make mrproper Delete the current configuration, and all generated files 1247# make distclean Remove editor backup files, patch leftover files and the like 1248 1249# Directories & files removed with 'make clean' 1250CLEAN_DIRS += $(MODVERDIR) 1251 1252# Directories & files removed with 'make mrproper' 1253MRPROPER_DIRS += include/config usr/include include/generated \ 1254 arch/*/include/generated .tmp_objdiff 1255MRPROPER_FILES += .config .config.old .version .old_version \ 1256 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1257 signing_key.pem signing_key.priv signing_key.x509 \ 1258 x509.genkey extra_certificates signing_key.x509.keyid \ 1259 signing_key.x509.signer vmlinux-gdb.py 1260 1261# clean - Delete most, but leave enough to build external modules 1262# 1263clean: rm-dirs := $(CLEAN_DIRS) 1264clean: rm-files := $(CLEAN_FILES) 1265clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1266 1267PHONY += $(clean-dirs) clean archclean vmlinuxclean 1268$(clean-dirs): 1269 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1270 1271vmlinuxclean: 1272 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1273 1274clean: archclean vmlinuxclean 1275 1276# mrproper - Delete all generated files, including .config 1277# 1278mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1279mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1280mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1281 1282PHONY += $(mrproper-dirs) mrproper archmrproper 1283$(mrproper-dirs): 1284 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1285 1286mrproper: clean archmrproper $(mrproper-dirs) 1287 $(call cmd,rmdirs) 1288 $(call cmd,rmfiles) 1289 1290# distclean 1291# 1292PHONY += distclean 1293 1294distclean: mrproper 1295 @find $(srctree) $(RCS_FIND_IGNORE) \ 1296 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1297 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1298 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \ 1299 -type f -print | xargs rm -f 1300 1301 1302# Packaging of the kernel to various formats 1303# --------------------------------------------------------------------------- 1304# rpm target kept for backward compatibility 1305package-dir := scripts/package 1306 1307%src-pkg: FORCE 1308 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1309%pkg: include/config/kernel.release FORCE 1310 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1311rpm: include/config/kernel.release FORCE 1312 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1313 1314 1315# Brief documentation of the typical targets used 1316# --------------------------------------------------------------------------- 1317 1318boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1319boards := $(sort $(notdir $(boards))) 1320board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1321board-dirs := $(sort $(notdir $(board-dirs:/=))) 1322 1323PHONY += help 1324help: 1325 @echo 'Cleaning targets:' 1326 @echo ' clean - Remove most generated files but keep the config and' 1327 @echo ' enough build support to build external modules' 1328 @echo ' mrproper - Remove all generated files + config + various backup files' 1329 @echo ' distclean - mrproper + remove editor backup and patch files' 1330 @echo '' 1331 @echo 'Configuration targets:' 1332 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1333 @echo '' 1334 @echo 'Other generic targets:' 1335 @echo ' all - Build all targets marked with [*]' 1336 @echo '* vmlinux - Build the bare kernel' 1337 @echo '* modules - Build all modules' 1338 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1339 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1340 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1341 @echo ' dir/ - Build all files in dir and below' 1342 @echo ' dir/file.[ois] - Build specified target only' 1343 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1344 @echo ' (requires a recent binutils and recent build (System.map))' 1345 @echo ' dir/file.ko - Build module including final link' 1346 @echo ' modules_prepare - Set up for building external modules' 1347 @echo ' tags/TAGS - Generate tags file for editors' 1348 @echo ' cscope - Generate cscope index' 1349 @echo ' gtags - Generate GNU GLOBAL index' 1350 @echo ' kernelrelease - Output the release version string (use with make -s)' 1351 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1352 @echo ' image_name - Output the image name (use with make -s)' 1353 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1354 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1355 echo '' 1356 @echo 'Static analysers' 1357 @echo ' checkstack - Generate a list of stack hogs' 1358 @echo ' namespacecheck - Name space analysis on compiled kernel' 1359 @echo ' versioncheck - Sanity check on version.h usage' 1360 @echo ' includecheck - Check for duplicate included header files' 1361 @echo ' export_report - List the usages of all exported symbols' 1362 @echo ' headers_check - Sanity check on exported headers' 1363 @echo ' headerdep - Detect inclusion cycles in headers' 1364 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1365 @echo '' 1366 @echo 'Kernel selftest' 1367 @echo ' kselftest - Build and run kernel selftest (run as root)' 1368 @echo ' Build, install, and boot kernel before' 1369 @echo ' running kselftest on it' 1370 @echo ' kselftest-clean - Remove all generated kselftest files' 1371 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed' 1372 @echo ' .config.' 1373 @echo '' 1374 @echo 'Kernel packaging:' 1375 @$(MAKE) $(build)=$(package-dir) help 1376 @echo '' 1377 @echo 'Documentation targets:' 1378 @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp 1379 @echo '' 1380 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1381 @echo '' 1382 @echo 'Architecture specific targets ($(SRCARCH)):' 1383 @$(if $(archhelp),$(archhelp),\ 1384 echo ' No architecture specific help defined for $(SRCARCH)') 1385 @echo '' 1386 @$(if $(boards), \ 1387 $(foreach b, $(boards), \ 1388 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1389 echo '') 1390 @$(if $(board-dirs), \ 1391 $(foreach b, $(board-dirs), \ 1392 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1393 printf " %-16s - Show all of the above\\n" help-boards; \ 1394 echo '') 1395 1396 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1397 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1398 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1399 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1400 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1401 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1402 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1403 @echo ' 1: warnings which may be relevant and do not occur too often' 1404 @echo ' 2: warnings which occur quite often but may still be relevant' 1405 @echo ' 3: more obscure warnings, can most likely be ignored' 1406 @echo ' Multiple levels can be combined with W=12 or W=123' 1407 @echo '' 1408 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1409 @echo 'For further info see the ./README file' 1410 1411 1412help-board-dirs := $(addprefix help-,$(board-dirs)) 1413 1414help-boards: $(help-board-dirs) 1415 1416boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1417 1418$(help-board-dirs): help-%: 1419 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1420 @$(if $(boards-per-dir), \ 1421 $(foreach b, $(boards-per-dir), \ 1422 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1423 echo '') 1424 1425 1426# Documentation targets 1427# --------------------------------------------------------------------------- 1428DOC_TARGETS := xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs 1429PHONY += $(DOC_TARGETS) 1430$(DOC_TARGETS): scripts_basic FORCE 1431 $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype 1432 $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@ 1433 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1434 1435else # KBUILD_EXTMOD 1436 1437### 1438# External module support. 1439# When building external modules the kernel used as basis is considered 1440# read-only, and no consistency checks are made and the make 1441# system is not used on the basis kernel. If updates are required 1442# in the basis kernel ordinary make commands (without M=...) must 1443# be used. 1444# 1445# The following are the only valid targets when building external 1446# modules. 1447# make M=dir clean Delete all automatically generated files 1448# make M=dir modules Make all modules in specified dir 1449# make M=dir Same as 'make M=dir modules' 1450# make M=dir modules_install 1451# Install the modules built in the module directory 1452# Assumes install directory is already created 1453 1454# We are always building modules 1455KBUILD_MODULES := 1 1456PHONY += crmodverdir 1457crmodverdir: 1458 $(cmd_crmodverdir) 1459 1460PHONY += $(objtree)/Module.symvers 1461$(objtree)/Module.symvers: 1462 @test -e $(objtree)/Module.symvers || ( \ 1463 echo; \ 1464 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1465 echo " is missing; modules will have no dependencies and modversions."; \ 1466 echo ) 1467 1468module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1469PHONY += $(module-dirs) modules 1470$(module-dirs): crmodverdir $(objtree)/Module.symvers 1471 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1472 1473modules: $(module-dirs) 1474 @$(kecho) ' Building modules, stage 2.'; 1475 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1476 1477PHONY += modules_install 1478modules_install: _emodinst_ _emodinst_post 1479 1480install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1481PHONY += _emodinst_ 1482_emodinst_: 1483 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1484 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1485 1486PHONY += _emodinst_post 1487_emodinst_post: _emodinst_ 1488 $(call cmd,depmod) 1489 1490clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1491 1492PHONY += $(clean-dirs) clean 1493$(clean-dirs): 1494 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1495 1496clean: rm-dirs := $(MODVERDIR) 1497clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1498 1499PHONY += help 1500help: 1501 @echo ' Building external modules.' 1502 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1503 @echo '' 1504 @echo ' modules - default target, build the module(s)' 1505 @echo ' modules_install - install the module' 1506 @echo ' clean - remove generated files in module directory only' 1507 @echo '' 1508 1509# Dummies... 1510PHONY += prepare scripts 1511prepare: ; 1512scripts: ; 1513endif # KBUILD_EXTMOD 1514 1515clean: $(clean-dirs) 1516 $(call cmd,rmdirs) 1517 $(call cmd,rmfiles) 1518 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1519 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1520 -o -name '*.ko.*' \ 1521 -o -name '*.dwo' \ 1522 -o -name '*.su' \ 1523 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1524 -o -name '*.symtypes' -o -name 'modules.order' \ 1525 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1526 -o -name '*.c.[012]*.*' \ 1527 -o -name '*.gcno' \) -type f -print | xargs rm -f 1528 1529# Generate tags for editors 1530# --------------------------------------------------------------------------- 1531quiet_cmd_tags = GEN $@ 1532 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1533 1534tags TAGS cscope gtags: FORCE 1535 $(call cmd,tags) 1536 1537# Scripts to check various things for consistency 1538# --------------------------------------------------------------------------- 1539 1540PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1541 1542includecheck: 1543 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1544 -name '*.[hcS]' -type f -print | sort \ 1545 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1546 1547versioncheck: 1548 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1549 -name '*.[hcS]' -type f -print | sort \ 1550 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1551 1552coccicheck: 1553 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1554 1555namespacecheck: 1556 $(PERL) $(srctree)/scripts/namespace.pl 1557 1558export_report: 1559 $(PERL) $(srctree)/scripts/export_report.pl 1560 1561endif #ifeq ($(config-targets),1) 1562endif #ifeq ($(mixed-targets),1) 1563 1564PHONY += checkstack kernelrelease kernelversion image_name 1565 1566# UML needs a little special treatment here. It wants to use the host 1567# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1568# else wants $(ARCH), including people doing cross-builds, which means 1569# that $(SUBARCH) doesn't work here. 1570ifeq ($(ARCH), um) 1571CHECKSTACK_ARCH := $(SUBARCH) 1572else 1573CHECKSTACK_ARCH := $(ARCH) 1574endif 1575checkstack: 1576 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1577 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1578 1579kernelrelease: 1580 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1581 1582kernelversion: 1583 @echo $(KERNELVERSION) 1584 1585image_name: 1586 @echo $(KBUILD_IMAGE) 1587 1588# Clear a bunch of variables before executing the submake 1589tools/: FORCE 1590 $(Q)mkdir -p $(objtree)/tools 1591 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ 1592 1593tools/%: FORCE 1594 $(Q)mkdir -p $(objtree)/tools 1595 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $* 1596 1597# Single targets 1598# --------------------------------------------------------------------------- 1599# Single targets are compatible with: 1600# - build with mixed source and output 1601# - build with separate output dir 'make O=...' 1602# - external modules 1603# 1604# target-dir => where to store outputfile 1605# build-dir => directory in kernel source tree to use 1606 1607ifeq ($(KBUILD_EXTMOD),) 1608 build-dir = $(patsubst %/,%,$(dir $@)) 1609 target-dir = $(dir $@) 1610else 1611 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1612 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1613 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1614endif 1615 1616%.s: %.c prepare scripts FORCE 1617 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1618%.i: %.c prepare scripts FORCE 1619 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1620%.o: %.c prepare scripts FORCE 1621 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1622%.lst: %.c prepare scripts FORCE 1623 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1624%.s: %.S prepare scripts FORCE 1625 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1626%.o: %.S prepare scripts FORCE 1627 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1628%.symtypes: %.c prepare scripts FORCE 1629 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1630 1631# Modules 1632/: prepare scripts FORCE 1633 $(cmd_crmodverdir) 1634 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1635 $(build)=$(build-dir) 1636# Make sure the latest headers are built for Documentation 1637Documentation/ samples/: headers_install 1638%/: prepare scripts FORCE 1639 $(cmd_crmodverdir) 1640 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1641 $(build)=$(build-dir) 1642%.ko: prepare scripts FORCE 1643 $(cmd_crmodverdir) 1644 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1645 $(build)=$(build-dir) $(@:.ko=.o) 1646 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1647 1648# FIXME Should go into a make.lib or something 1649# =========================================================================== 1650 1651quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1652 cmd_rmdirs = rm -rf $(rm-dirs) 1653 1654quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1655 cmd_rmfiles = rm -f $(rm-files) 1656 1657# Run depmod only if we have System.map and depmod is executable 1658quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1659 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1660 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" 1661 1662# Create temporary dir for module support files 1663# clean it up only when building all modules 1664cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1665 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1666 1667# read all saved command lines 1668 1669targets := $(wildcard $(sort $(targets))) 1670cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1671 1672ifneq ($(cmd_files),) 1673 $(cmd_files): ; # Do not try to update included dependency files 1674 include $(cmd_files) 1675endif 1676 1677endif # skip-makefile 1678 1679PHONY += FORCE 1680FORCE: 1681 1682# Declare the contents of the .PHONY variable as phony. We keep that 1683# information in a variable so we can use it in if_changed and friends. 1684.PHONY: $(PHONY) 1685