1VERSION = 4 2PATCHLEVEL = 9 3SUBLEVEL = 0 4EXTRAVERSION = 5NAME = Roaring Lionus 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 -Wno-maybe-uninitialized 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 $(call cc-option,-fno-PIE) 403 404 405KBUILD_AFLAGS_KERNEL := 406KBUILD_CFLAGS_KERNEL := 407KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE) 408KBUILD_AFLAGS_MODULE := -DMODULE 409KBUILD_CFLAGS_MODULE := -DMODULE 410KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 411 412# Read KERNELRELEASE from include/config/kernel.release (if it exists) 413KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 414KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 415 416export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 417export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 418export CPP AR NM STRIP OBJCOPY OBJDUMP 419export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE 420export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 421 422export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 423export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV CFLAGS_KCOV CFLAGS_KASAN CFLAGS_UBSAN 424export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 425export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 426export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 427export KBUILD_ARFLAGS 428 429# When compiling out-of-tree modules, put MODVERDIR in the module 430# tree rather than in the kernel tree. The kernel tree might 431# even be read-only. 432export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 433 434# Files to ignore in find ... statements 435 436export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 437 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 438 -prune -o 439export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 440 --exclude CVS --exclude .pc --exclude .hg --exclude .git 441 442# =========================================================================== 443# Rules shared between *config targets and build targets 444 445# Basic helpers built in scripts/ 446PHONY += scripts_basic 447scripts_basic: 448 $(Q)$(MAKE) $(build)=scripts/basic 449 $(Q)rm -f .tmp_quiet_recordmcount 450 451# To avoid any implicit rule to kick in, define an empty command. 452scripts/basic/%: scripts_basic ; 453 454PHONY += outputmakefile 455# outputmakefile generates a Makefile in the output directory, if using a 456# separate output directory. This allows convenient use of make in the 457# output directory. 458outputmakefile: 459ifneq ($(KBUILD_SRC),) 460 $(Q)ln -fsn $(srctree) source 461 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 462 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 463endif 464 465# Support for using generic headers in asm-generic 466PHONY += asm-generic 467asm-generic: 468 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 469 src=asm obj=arch/$(SRCARCH)/include/generated/asm 470 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 471 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm 472 473# To make sure we do not include .config for any of the *config targets 474# catch them early, and hand them over to scripts/kconfig/Makefile 475# It is allowed to specify more targets when calling make, including 476# mixing *config targets and build targets. 477# For example 'make oldconfig all'. 478# Detect when mixed targets is specified, and make a second invocation 479# of make so .config is not included in this case either (for *config). 480 481version_h := include/generated/uapi/linux/version.h 482old_version_h := include/linux/version.h 483 484no-dot-config-targets := clean mrproper distclean \ 485 cscope gtags TAGS tags help% %docs check% coccicheck \ 486 $(version_h) headers_% archheaders archscripts \ 487 kernelversion %src-pkg 488 489config-targets := 0 490mixed-targets := 0 491dot-config := 1 492 493ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 494 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 495 dot-config := 0 496 endif 497endif 498 499ifeq ($(KBUILD_EXTMOD),) 500 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 501 config-targets := 1 502 ifneq ($(words $(MAKECMDGOALS)),1) 503 mixed-targets := 1 504 endif 505 endif 506endif 507# install and module_install need also be processed one by one 508ifneq ($(filter install,$(MAKECMDGOALS)),) 509 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 510 mixed-targets := 1 511 endif 512endif 513 514ifeq ($(mixed-targets),1) 515# =========================================================================== 516# We're called with mixed targets (*config and build targets). 517# Handle them one by one. 518 519PHONY += $(MAKECMDGOALS) __build_one_by_one 520 521$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 522 @: 523 524__build_one_by_one: 525 $(Q)set -e; \ 526 for i in $(MAKECMDGOALS); do \ 527 $(MAKE) -f $(srctree)/Makefile $$i; \ 528 done 529 530else 531ifeq ($(config-targets),1) 532# =========================================================================== 533# *config targets only - make sure prerequisites are updated, and descend 534# in scripts/kconfig to make the *config target 535 536# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 537# KBUILD_DEFCONFIG may point out an alternative default configuration 538# used for 'make defconfig' 539include arch/$(SRCARCH)/Makefile 540export KBUILD_DEFCONFIG KBUILD_KCONFIG 541 542config: scripts_basic outputmakefile FORCE 543 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 544 545%config: scripts_basic outputmakefile FORCE 546 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 547 548else 549# =========================================================================== 550# Build targets only - this includes vmlinux, arch specific targets, clean 551# targets and others. In general all targets except *config targets. 552 553ifeq ($(KBUILD_EXTMOD),) 554# Additional helpers built in scripts/ 555# Carefully list dependencies so we do not try to build scripts twice 556# in parallel 557PHONY += scripts 558scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \ 559 asm-generic gcc-plugins 560 $(Q)$(MAKE) $(build)=$(@) 561 562# Objects we will link into vmlinux / subdirs we need to visit 563init-y := init/ 564drivers-y := drivers/ sound/ firmware/ 565net-y := net/ 566libs-y := lib/ 567core-y := usr/ 568virt-y := virt/ 569endif # KBUILD_EXTMOD 570 571ifeq ($(dot-config),1) 572# Read in config 573-include include/config/auto.conf 574 575ifeq ($(KBUILD_EXTMOD),) 576# Read in dependencies to all Kconfig* files, make sure to run 577# oldconfig if changes are detected. 578-include include/config/auto.conf.cmd 579 580# To avoid any implicit rule to kick in, define an empty command 581$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 582 583# If .config is newer than include/config/auto.conf, someone tinkered 584# with it and forgot to run make oldconfig. 585# if auto.conf.cmd is missing then we are probably in a cleaned tree so 586# we execute the config step to be sure to catch updated Kconfig files 587include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 588 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 589else 590# external modules needs include/generated/autoconf.h and include/config/auto.conf 591# but do not care if they are up-to-date. Use auto.conf to trigger the test 592PHONY += include/config/auto.conf 593 594include/config/auto.conf: 595 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 596 echo >&2; \ 597 echo >&2 " ERROR: Kernel configuration is invalid."; \ 598 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 599 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 600 echo >&2 ; \ 601 /bin/false) 602 603endif # KBUILD_EXTMOD 604 605else 606# Dummy target needed, because used as prerequisite 607include/config/auto.conf: ; 608endif # $(dot-config) 609 610# For the kernel to actually contain only the needed exported symbols, 611# we have to build modules as well to determine what those symbols are. 612# (this can be evaluated only once include/config/auto.conf has been included) 613ifdef CONFIG_TRIM_UNUSED_KSYMS 614 KBUILD_MODULES := 1 615endif 616 617# The all: target is the default when no target is given on the 618# command line. 619# This allow a user to issue only 'make' to build a kernel including modules 620# Defaults to vmlinux, but the arch makefile usually adds further targets 621all: vmlinux 622 623# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 624# values of the respective KBUILD_* variables 625ARCH_CPPFLAGS := 626ARCH_AFLAGS := 627ARCH_CFLAGS := 628include arch/$(SRCARCH)/Makefile 629 630KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 631KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 632 633ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 634KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) 635KBUILD_CFLAGS += $(call cc-option,-fdata-sections,) 636endif 637 638ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 639KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) 640else 641ifdef CONFIG_PROFILE_ALL_BRANCHES 642KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) 643else 644KBUILD_CFLAGS += -O2 645endif 646endif 647 648KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ 649 $(call cc-disable-warning,maybe-uninitialized,)) 650 651# Tell gcc to never replace conditional load with a non-conditional one 652KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 653 654include scripts/Makefile.gcc-plugins 655 656ifdef CONFIG_READABLE_ASM 657# Disable optimizations that make assembler listings hard to read. 658# reorder blocks reorders the control in the function 659# ipa clone creates specialized cloned functions 660# partial inlining inlines only parts of functions 661KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 662 $(call cc-option,-fno-ipa-cp-clone,) \ 663 $(call cc-option,-fno-partial-inlining) 664endif 665 666ifneq ($(CONFIG_FRAME_WARN),0) 667KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 668endif 669 670# This selects the stack protector compiler flag. Testing it is delayed 671# until after .config has been reprocessed, in the prepare-compiler-check 672# target. 673ifdef CONFIG_CC_STACKPROTECTOR_REGULAR 674 stackp-flag := -fstack-protector 675 stackp-name := REGULAR 676else 677ifdef CONFIG_CC_STACKPROTECTOR_STRONG 678 stackp-flag := -fstack-protector-strong 679 stackp-name := STRONG 680else 681 # Force off for distro compilers that enable stack protector by default. 682 stackp-flag := $(call cc-option, -fno-stack-protector) 683endif 684endif 685# Find arch-specific stack protector compiler sanity-checking script. 686ifdef CONFIG_CC_STACKPROTECTOR 687 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh 688 stackp-check := $(wildcard $(stackp-path)) 689endif 690KBUILD_CFLAGS += $(stackp-flag) 691 692ifeq ($(cc-name),clang) 693KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 694KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,) 695KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) 696KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 697KBUILD_CFLAGS += $(call cc-disable-warning, gnu) 698# Quiet clang warning: comparison of unsigned expression < 0 is always false 699KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 700# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 701# source of a reference will be _MergedGlobals and not on of the whitelisted names. 702# See modpost pattern 2 703KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 704KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 705else 706 707# These warnings generated too much noise in a regular build. 708# Use make W=1 to enable them (see scripts/Makefile.build) 709KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 710KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 711endif 712 713ifdef CONFIG_FRAME_POINTER 714KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 715else 716# Some targets (ARM with Thumb2, for example), can't be built with frame 717# pointers. For those, we don't have FUNCTION_TRACER automatically 718# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 719# incompatible with -fomit-frame-pointer with current GCC, so we don't use 720# -fomit-frame-pointer with FUNCTION_TRACER. 721ifndef CONFIG_FUNCTION_TRACER 722KBUILD_CFLAGS += -fomit-frame-pointer 723endif 724endif 725 726KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 727 728ifdef CONFIG_DEBUG_INFO 729ifdef CONFIG_DEBUG_INFO_SPLIT 730KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 731else 732KBUILD_CFLAGS += -g 733endif 734KBUILD_AFLAGS += -Wa,-gdwarf-2 735endif 736ifdef CONFIG_DEBUG_INFO_DWARF4 737KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 738endif 739 740ifdef CONFIG_DEBUG_INFO_REDUCED 741KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 742 $(call cc-option,-fno-var-tracking) 743endif 744 745ifdef CONFIG_FUNCTION_TRACER 746ifndef CC_FLAGS_FTRACE 747CC_FLAGS_FTRACE := -pg 748endif 749export CC_FLAGS_FTRACE 750ifdef CONFIG_HAVE_FENTRY 751CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 752endif 753KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) 754KBUILD_AFLAGS += $(CC_USING_FENTRY) 755ifdef CONFIG_DYNAMIC_FTRACE 756 ifdef CONFIG_HAVE_C_RECORDMCOUNT 757 BUILD_C_RECORDMCOUNT := y 758 export BUILD_C_RECORDMCOUNT 759 endif 760endif 761endif 762 763# We trigger additional mismatches with less inlining 764ifdef CONFIG_DEBUG_SECTION_MISMATCH 765KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 766endif 767 768# arch Makefile may override CC so keep this after arch Makefile is included 769NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 770CHECKFLAGS += $(NOSTDINC_FLAGS) 771 772# warn about C99 declaration after statement 773KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 774 775# disable pointer signed / unsigned warnings in gcc 4.0 776KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 777 778# disable invalid "can't wrap" optimizations for signed / pointers 779KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 780 781# conserve stack if available 782KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 783 784# disallow errors like 'EXPORT_GPL(foo);' with missing header 785KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 786 787# require functions to have arguments in prototypes, not empty 'int foo()' 788KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 789 790# Prohibit date/time macros, which would make the build non-deterministic 791KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 792 793# use the deterministic mode of AR if available 794KBUILD_ARFLAGS := $(call ar-option,D) 795 796# check for 'asm goto' 797ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 798 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 799 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO 800endif 801 802include scripts/Makefile.kasan 803include scripts/Makefile.extrawarn 804include scripts/Makefile.ubsan 805 806# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 807# last assignments 808KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 809KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 810KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 811 812# Use --build-id when available. 813LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 814 $(call cc-ldoption, -Wl$(comma)--build-id,)) 815KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 816LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 817 818ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 819LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) 820endif 821 822ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 823LDFLAGS_vmlinux += $(call ld-option, -X,) 824endif 825 826# Default kernel image to build when no specific target is given. 827# KBUILD_IMAGE may be overruled on the command line or 828# set in the environment 829# Also any assignments in arch/$(ARCH)/Makefile take precedence over 830# this default value 831export KBUILD_IMAGE ?= vmlinux 832 833# 834# INSTALL_PATH specifies where to place the updated kernel and system map 835# images. Default is /boot, but you can set it to other values 836export INSTALL_PATH ?= /boot 837 838# 839# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 840# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 841# an argument if needed. Otherwise it defaults to the kernel install path 842# 843export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 844 845# 846# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 847# relocations required by build roots. This is not defined in the 848# makefile but the argument can be passed to make if needed. 849# 850 851MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 852export MODLIB 853 854# 855# INSTALL_MOD_STRIP, if defined, will cause modules to be 856# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 857# the default option --strip-debug will be used. Otherwise, 858# INSTALL_MOD_STRIP value will be used as the options to the strip command. 859 860ifdef INSTALL_MOD_STRIP 861ifeq ($(INSTALL_MOD_STRIP),1) 862mod_strip_cmd = $(STRIP) --strip-debug 863else 864mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 865endif # INSTALL_MOD_STRIP=1 866else 867mod_strip_cmd = true 868endif # INSTALL_MOD_STRIP 869export mod_strip_cmd 870 871# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 872# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 873# or CONFIG_MODULE_COMPRESS_XZ. 874 875mod_compress_cmd = true 876ifdef CONFIG_MODULE_COMPRESS 877 ifdef CONFIG_MODULE_COMPRESS_GZIP 878 mod_compress_cmd = gzip -n -f 879 endif # CONFIG_MODULE_COMPRESS_GZIP 880 ifdef CONFIG_MODULE_COMPRESS_XZ 881 mod_compress_cmd = xz -f 882 endif # CONFIG_MODULE_COMPRESS_XZ 883endif # CONFIG_MODULE_COMPRESS 884export mod_compress_cmd 885 886# Select initial ramdisk compression format, default is gzip(1). 887# This shall be used by the dracut(8) tool while creating an initramfs image. 888# 889INITRD_COMPRESS-y := gzip 890INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 891INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma 892INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz 893INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo 894INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 895# do not export INITRD_COMPRESS, since we didn't actually 896# choose a sane default compression above. 897# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 898 899ifdef CONFIG_MODULE_SIG_ALL 900$(eval $(call config_filename,MODULE_SIG_KEY)) 901 902mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 903else 904mod_sign_cmd = true 905endif 906export mod_sign_cmd 907 908 909ifeq ($(KBUILD_EXTMOD),) 910core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 911 912vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 913 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 914 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 915 916vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 917 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) 918 919init-y := $(patsubst %/, %/built-in.o, $(init-y)) 920core-y := $(patsubst %/, %/built-in.o, $(core-y)) 921drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 922net-y := $(patsubst %/, %/built-in.o, $(net-y)) 923libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 924libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 925libs-y := $(libs-y1) $(libs-y2) 926virt-y := $(patsubst %/, %/built-in.o, $(virt-y)) 927 928# Externally visible symbols (used by link-vmlinux.sh) 929export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 930export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y) 931export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 932export LDFLAGS_vmlinux 933# used by scripts/pacmage/Makefile 934export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) 935 936vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) 937 938# Include targets which we want to execute sequentially if the rest of the 939# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be 940# evaluated more than once. 941PHONY += vmlinux_prereq 942vmlinux_prereq: $(vmlinux-deps) FORCE 943ifdef CONFIG_HEADERS_CHECK 944 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 945endif 946ifdef CONFIG_GDB_SCRIPTS 947 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py 948endif 949ifdef CONFIG_TRIM_UNUSED_KSYMS 950 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 951 "$(MAKE) -f $(srctree)/Makefile vmlinux" 952endif 953 954# standalone target for easier testing 955include/generated/autoksyms.h: FORCE 956 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true 957 958ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 959 960# Final link of vmlinux with optional arch pass after final link 961 cmd_link-vmlinux = \ 962 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ 963 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 964 965vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE 966 +$(call if_changed,link-vmlinux) 967 968# Build samples along the rest of the kernel 969ifdef CONFIG_SAMPLES 970vmlinux-dirs += samples 971endif 972 973# The actual objects are generated when descending, 974# make sure no implicit rule kicks in 975$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 976 977# Handle descending into subdirectories listed in $(vmlinux-dirs) 978# Preset locale variables to speed up the build process. Limit locale 979# tweaks to this spot to avoid wrong language settings when running 980# make menuconfig etc. 981# Error messages still appears in the original language 982 983PHONY += $(vmlinux-dirs) 984$(vmlinux-dirs): prepare scripts 985 $(Q)$(MAKE) $(build)=$@ 986 987define filechk_kernel.release 988 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 989endef 990 991# Store (new) KERNELRELEASE string in include/config/kernel.release 992include/config/kernel.release: include/config/auto.conf FORCE 993 $(call filechk,kernel.release) 994 995 996# Things we need to do before we recursively start building the kernel 997# or the modules are listed in "prepare". 998# A multi level approach is used. prepareN is processed before prepareN-1. 999# archprepare is used in arch Makefiles and when processed asm symlink, 1000# version.h and scripts_basic is processed / created.
1001 1002# Listed in dependency order 1003PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 1004 1005# prepare3 is used to check if we are building in a separate output directory, 1006# and if so do: 1007# 1) Check that make has not been executed in the kernel src $(srctree) 1008prepare3: include/config/kernel.release 1009ifneq ($(KBUILD_SRC),) 1010 @$(kecho) ' Using $(srctree) as source for kernel' 1011 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 1012 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 1013 echo >&2 " in the '$(srctree)' directory.";\ 1014 /bin/false; \ 1015 fi; 1016endif 1017 1018# prepare2 creates a makefile if using a separate output directory. 1019# From this point forward, .config has been reprocessed, so any rules 1020# that need to depend on updated CONFIG_* values can be checked here. 1021prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic 1022 1023prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ 1024 include/config/auto.conf 1025 $(cmd_crmodverdir) 1026 1027archprepare: archheaders archscripts prepare1 scripts_basic 1028 1029prepare0: archprepare gcc-plugins 1030 $(Q)$(MAKE) $(build)=. 1031 1032# All the preparing.. 1033prepare: prepare0 prepare-objtool 1034 1035ifdef CONFIG_STACK_VALIDATION 1036 has_libelf := $(call try-run,\ 1037 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) 1038 ifeq ($(has_libelf),1) 1039 objtool_target := tools/objtool FORCE 1040 else 1041 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel") 1042 SKIP_STACK_VALIDATION := 1 1043 export SKIP_STACK_VALIDATION 1044 endif 1045endif 1046 1047PHONY += prepare-objtool 1048prepare-objtool: $(objtool_target) 1049 1050# Check for CONFIG flags that require compiler support. Abort the build 1051# after .config has been processed, but before the kernel build starts. 1052# 1053# For security-sensitive CONFIG options, we don't want to fallback and/or 1054# silently change which compiler flags will be used, since that leads to 1055# producing kernels with different security feature characteristics 1056# depending on the compiler used. (For example, "But I selected 1057# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") 1058PHONY += prepare-compiler-check 1059prepare-compiler-check: FORCE 1060# Make sure compiler supports requested stack protector flag. 1061ifdef stackp-name 1062 ifeq ($(call cc-option, $(stackp-flag)),) 1063 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1064 $(stackp-flag) not supported by compiler >&2 && exit 1 1065 endif 1066endif 1067# Make sure compiler does not have buggy stack-protector support. 1068ifdef stackp-check 1069 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) 1070 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1071 $(stackp-flag) available but compiler is broken >&2 && exit 1 1072 endif 1073endif 1074 @: 1075 1076# Generate some files 1077# --------------------------------------------------------------------------- 1078 1079# KERNELRELEASE can change from a few different places, meaning version.h 1080# needs to be updated, so this check is forced on all builds 1081 1082uts_len := 64 1083define filechk_utsrelease.h 1084 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1085 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1086 exit 1; \ 1087 fi; \ 1088 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1089endef 1090 1091define filechk_version.h 1092 (echo \#define LINUX_VERSION_CODE $(shell \ 1093 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1094 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1095endef 1096 1097$(version_h): $(srctree)/Makefile FORCE 1098 $(call filechk,version.h) 1099 $(Q)rm -f $(old_version_h) 1100 1101include/generated/utsrelease.h: include/config/kernel.release FORCE 1102 $(call filechk,utsrelease.h) 1103 1104PHONY += headerdep 1105headerdep: 1106 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1107 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1108 1109# --------------------------------------------------------------------------- 1110# Firmware install 1111INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1112export INSTALL_FW_PATH 1113 1114PHONY += firmware_install 1115firmware_install: 1116 @mkdir -p $(objtree)/firmware 1117 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1118 1119# --------------------------------------------------------------------------- 1120# Kernel headers 1121 1122#Default location for installed headers 1123export INSTALL_HDR_PATH = $(objtree)/usr 1124 1125# If we do an all arch process set dst to asm-$(hdr-arch) 1126hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1127 1128PHONY += archheaders 1129archheaders: 1130 1131PHONY += archscripts 1132archscripts: 1133 1134PHONY += __headers 1135__headers: $(version_h) scripts_basic asm-generic archheaders archscripts 1136 $(Q)$(MAKE) $(build)=scripts build_unifdef 1137 1138PHONY += headers_install_all 1139headers_install_all: 1140 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1141 1142PHONY += headers_install 1143headers_install: __headers 1144 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ 1145 $(error Headers not exportable for the $(SRCARCH) architecture)) 1146 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1147 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) 1148 1149PHONY += headers_check_all 1150headers_check_all: headers_install_all 1151 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1152 1153PHONY += headers_check 1154headers_check: headers_install 1155 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 1156 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 1157 1158# --------------------------------------------------------------------------- 1159# Kernel selftest 1160 1161PHONY += kselftest 1162kselftest: 1163 $(Q)$(MAKE) -C tools/testing/selftests run_tests 1164 1165kselftest-clean: 1166 $(Q)$(MAKE) -C tools/testing/selftests clean 1167 1168PHONY += kselftest-merge 1169kselftest-merge: 1170 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1171 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 1172 -m $(objtree)/.config \ 1173 $(srctree)/tools/testing/selftests/*/config 1174 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1175 1176# --------------------------------------------------------------------------- 1177# Modules 1178 1179ifdef CONFIG_MODULES 1180 1181# By default, build modules as well 1182 1183all: modules 1184 1185# Build modules 1186# 1187# A module can be listed more than once in obj-m resulting in 1188# duplicate lines in modules.order files. Those are removed 1189# using awk while concatenating to the final file. 1190 1191PHONY += modules 1192modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1193 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1194 @$(kecho) ' Building modules, stage 2.'; 1195 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1196 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1197 1198modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1199 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1200 1201%/modules.builtin: include/config/auto.conf 1202 $(Q)$(MAKE) $(modbuiltin)=$* 1203 1204 1205# Target to prepare building external modules 1206PHONY += modules_prepare 1207modules_prepare: prepare scripts 1208 1209# Target to install modules 1210PHONY += modules_install 1211modules_install: _modinst_ _modinst_post 1212 1213PHONY += _modinst_ 1214_modinst_: 1215 @rm -rf $(MODLIB)/kernel 1216 @rm -f $(MODLIB)/source 1217 @mkdir -p $(MODLIB)/kernel 1218 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source 1219 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1220 rm -f $(MODLIB)/build ; \ 1221 ln -s $(CURDIR) $(MODLIB)/build ; \ 1222 fi 1223 @cp -f $(objtree)/modules.order $(MODLIB)/ 1224 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1225 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1226 1227# This depmod is only for convenience to give the initial 1228# boot a modules.dep even before / is mounted read-write. However the 1229# boot script depmod is the master version. 1230PHONY += _modinst_post 1231_modinst_post: _modinst_ 1232 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1233 $(call cmd,depmod) 1234 1235ifeq ($(CONFIG_MODULE_SIG), y) 1236PHONY += modules_sign 1237modules_sign: 1238 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1239endif 1240 1241else # CONFIG_MODULES 1242 1243# Modules not configured 1244# --------------------------------------------------------------------------- 1245 1246PHONY += modules modules_install 1247modules modules_install: 1248 @echo >&2 1249 @echo >&2 "The present kernel configuration has modules disabled." 1250 @echo >&2 "Type 'make config' and enable loadable module support." 1251 @echo >&2 "Then build a kernel with module support enabled." 1252 @echo >&2 1253 @exit 1 1254 1255endif # CONFIG_MODULES 1256 1257### 1258# Cleaning is done on three levels. 1259# make clean Delete most generated files 1260# Leave enough to build external modules 1261# make mrproper Delete the current configuration, and all generated files 1262# make distclean Remove editor backup files, patch leftover files and the like 1263 1264# Directories & files removed with 'make clean' 1265CLEAN_DIRS += $(MODVERDIR) 1266 1267# Directories & files removed with 'make mrproper' 1268MRPROPER_DIRS += include/config usr/include include/generated \ 1269 arch/*/include/generated .tmp_objdiff 1270MRPROPER_FILES += .config .config.old .version .old_version \ 1271 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1272 signing_key.pem signing_key.priv signing_key.x509 \ 1273 x509.genkey extra_certificates signing_key.x509.keyid \ 1274 signing_key.x509.signer vmlinux-gdb.py 1275 1276# clean - Delete most, but leave enough to build external modules 1277# 1278clean: rm-dirs := $(CLEAN_DIRS) 1279clean: rm-files := $(CLEAN_FILES) 1280clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1281 1282PHONY += $(clean-dirs) clean archclean vmlinuxclean 1283$(clean-dirs): 1284 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1285 1286vmlinuxclean: 1287 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1288 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1289 1290clean: archclean vmlinuxclean 1291 1292# mrproper - Delete all generated files, including .config 1293# 1294mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1295mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1296mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1297 1298PHONY += $(mrproper-dirs) mrproper archmrproper 1299$(mrproper-dirs): 1300 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1301 1302mrproper: clean archmrproper $(mrproper-dirs) 1303 $(call cmd,rmdirs) 1304 $(call cmd,rmfiles) 1305 1306# distclean 1307# 1308PHONY += distclean 1309 1310distclean: mrproper 1311 @find $(srctree) $(RCS_FIND_IGNORE) \ 1312 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1313 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1314 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \ 1315 -type f -print | xargs rm -f 1316 1317 1318# Packaging of the kernel to various formats 1319# --------------------------------------------------------------------------- 1320# rpm target kept for backward compatibility 1321package-dir := scripts/package 1322 1323%src-pkg: FORCE 1324 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1325%pkg: include/config/kernel.release FORCE 1326 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1327rpm: include/config/kernel.release FORCE 1328 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1329 1330 1331# Brief documentation of the typical targets used 1332# --------------------------------------------------------------------------- 1333 1334boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1335boards := $(sort $(notdir $(boards))) 1336board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1337board-dirs := $(sort $(notdir $(board-dirs:/=))) 1338 1339PHONY += help 1340help: 1341 @echo 'Cleaning targets:' 1342 @echo ' clean - Remove most generated files but keep the config and' 1343 @echo ' enough build support to build external modules' 1344 @echo ' mrproper - Remove all generated files + config + various backup files' 1345 @echo ' distclean - mrproper + remove editor backup and patch files' 1346 @echo '' 1347 @echo 'Configuration targets:' 1348 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1349 @echo '' 1350 @echo 'Other generic targets:' 1351 @echo ' all - Build all targets marked with [*]' 1352 @echo '* vmlinux - Build the bare kernel' 1353 @echo '* modules - Build all modules' 1354 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1355 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1356 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1357 @echo ' dir/ - Build all files in dir and below' 1358 @echo ' dir/file.[ois] - Build specified target only' 1359 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1360 @echo ' (requires a recent binutils and recent build (System.map))' 1361 @echo ' dir/file.ko - Build module including final link' 1362 @echo ' modules_prepare - Set up for building external modules' 1363 @echo ' tags/TAGS - Generate tags file for editors' 1364 @echo ' cscope - Generate cscope index' 1365 @echo ' gtags - Generate GNU GLOBAL index' 1366 @echo ' kernelrelease - Output the release version string (use with make -s)' 1367 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1368 @echo ' image_name - Output the image name (use with make -s)' 1369 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1370 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1371 echo '' 1372 @echo 'Static analysers' 1373 @echo ' checkstack - Generate a list of stack hogs' 1374 @echo ' namespacecheck - Name space analysis on compiled kernel' 1375 @echo ' versioncheck - Sanity check on version.h usage' 1376 @echo ' includecheck - Check for duplicate included header files' 1377 @echo ' export_report - List the usages of all exported symbols' 1378 @echo ' headers_check - Sanity check on exported headers' 1379 @echo ' headerdep - Detect inclusion cycles in headers' 1380 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1381 @echo '' 1382 @echo 'Kernel selftest' 1383 @echo ' kselftest - Build and run kernel selftest (run as root)' 1384 @echo ' Build, install, and boot kernel before' 1385 @echo ' running kselftest on it' 1386 @echo ' kselftest-clean - Remove all generated kselftest files' 1387 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed' 1388 @echo ' .config.' 1389 @echo '' 1390 @echo 'Kernel packaging:' 1391 @$(MAKE) $(build)=$(package-dir) help 1392 @echo '' 1393 @echo 'Documentation targets:' 1394 @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp 1395 @echo '' 1396 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1397 @echo '' 1398 @echo 'Architecture specific targets ($(SRCARCH)):' 1399 @$(if $(archhelp),$(archhelp),\ 1400 echo ' No architecture specific help defined for $(SRCARCH)') 1401 @echo '' 1402 @$(if $(boards), \ 1403 $(foreach b, $(boards), \ 1404 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1405 echo '') 1406 @$(if $(board-dirs), \ 1407 $(foreach b, $(board-dirs), \ 1408 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1409 printf " %-16s - Show all of the above\\n" help-boards; \ 1410 echo '') 1411 1412 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1413 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1414 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1415 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1416 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1417 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1418 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1419 @echo ' 1: warnings which may be relevant and do not occur too often' 1420 @echo ' 2: warnings which occur quite often but may still be relevant' 1421 @echo ' 3: more obscure warnings, can most likely be ignored' 1422 @echo ' Multiple levels can be combined with W=12 or W=123' 1423 @echo '' 1424 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1425 @echo 'For further info see the ./README file' 1426 1427 1428help-board-dirs := $(addprefix help-,$(board-dirs)) 1429 1430help-boards: $(help-board-dirs) 1431 1432boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1433 1434$(help-board-dirs): help-%: 1435 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1436 @$(if $(boards-per-dir), \ 1437 $(foreach b, $(boards-per-dir), \ 1438 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1439 echo '') 1440 1441 1442# Documentation targets 1443# --------------------------------------------------------------------------- 1444DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs 1445PHONY += $(DOC_TARGETS) 1446$(DOC_TARGETS): scripts_basic FORCE 1447 $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype 1448 $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@ 1449 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1450 1451else # KBUILD_EXTMOD 1452 1453### 1454# External module support. 1455# When building external modules the kernel used as basis is considered 1456# read-only, and no consistency checks are made and the make 1457# system is not used on the basis kernel. If updates are required 1458# in the basis kernel ordinary make commands (without M=...) must 1459# be used. 1460# 1461# The following are the only valid targets when building external 1462# modules. 1463# make M=dir clean Delete all automatically generated files 1464# make M=dir modules Make all modules in specified dir 1465# make M=dir Same as 'make M=dir modules' 1466# make M=dir modules_install 1467# Install the modules built in the module directory 1468# Assumes install directory is already created 1469 1470# We are always building modules 1471KBUILD_MODULES := 1 1472PHONY += crmodverdir 1473crmodverdir: 1474 $(cmd_crmodverdir) 1475 1476PHONY += $(objtree)/Module.symvers 1477$(objtree)/Module.symvers: 1478 @test -e $(objtree)/Module.symvers || ( \ 1479 echo; \ 1480 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1481 echo " is missing; modules will have no dependencies and modversions."; \ 1482 echo ) 1483 1484module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1485PHONY += $(module-dirs) modules 1486$(module-dirs): crmodverdir $(objtree)/Module.symvers 1487 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1488 1489modules: $(module-dirs) 1490 @$(kecho) ' Building modules, stage 2.'; 1491 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1492 1493PHONY += modules_install 1494modules_install: _emodinst_ _emodinst_post 1495 1496install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1497PHONY += _emodinst_ 1498_emodinst_: 1499 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1500 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1501 1502PHONY += _emodinst_post 1503_emodinst_post: _emodinst_ 1504 $(call cmd,depmod) 1505 1506clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1507 1508PHONY += $(clean-dirs) clean 1509$(clean-dirs): 1510 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1511 1512clean: rm-dirs := $(MODVERDIR) 1513clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1514 1515PHONY += help 1516help: 1517 @echo ' Building external modules.' 1518 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1519 @echo '' 1520 @echo ' modules - default target, build the module(s)' 1521 @echo ' modules_install - install the module' 1522 @echo ' clean - remove generated files in module directory only' 1523 @echo '' 1524 1525# Dummies... 1526PHONY += prepare scripts 1527prepare: ; 1528scripts: ; 1529endif # KBUILD_EXTMOD 1530 1531clean: $(clean-dirs) 1532 $(call cmd,rmdirs) 1533 $(call cmd,rmfiles) 1534 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1535 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1536 -o -name '*.ko.*' \ 1537 -o -name '*.dwo' \ 1538 -o -name '*.su' \ 1539 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1540 -o -name '*.symtypes' -o -name 'modules.order' \ 1541 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1542 -o -name '*.c.[012]*.*' \ 1543 -o -name '*.gcno' \) -type f -print | xargs rm -f 1544 1545# Generate tags for editors 1546# --------------------------------------------------------------------------- 1547quiet_cmd_tags = GEN $@ 1548 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1549 1550tags TAGS cscope gtags: FORCE 1551 $(call cmd,tags) 1552 1553# Scripts to check various things for consistency 1554# --------------------------------------------------------------------------- 1555 1556PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1557 1558includecheck: 1559 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1560 -name '*.[hcS]' -type f -print | sort \ 1561 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1562 1563versioncheck: 1564 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1565 -name '*.[hcS]' -type f -print | sort \ 1566 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1567 1568coccicheck: 1569 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1570 1571namespacecheck: 1572 $(PERL) $(srctree)/scripts/namespace.pl 1573 1574export_report: 1575 $(PERL) $(srctree)/scripts/export_report.pl 1576 1577endif #ifeq ($(config-targets),1) 1578endif #ifeq ($(mixed-targets),1) 1579 1580PHONY += checkstack kernelrelease kernelversion image_name 1581 1582# UML needs a little special treatment here. It wants to use the host 1583# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1584# else wants $(ARCH), including people doing cross-builds, which means 1585# that $(SUBARCH) doesn't work here. 1586ifeq ($(ARCH), um) 1587CHECKSTACK_ARCH := $(SUBARCH) 1588else 1589CHECKSTACK_ARCH := $(ARCH) 1590endif 1591checkstack: 1592 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1593 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1594 1595kernelrelease: 1596 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1597 1598kernelversion: 1599 @echo $(KERNELVERSION) 1600 1601image_name: 1602 @echo $(KBUILD_IMAGE) 1603 1604# Clear a bunch of variables before executing the submake 1605tools/: FORCE 1606 $(Q)mkdir -p $(objtree)/tools 1607 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ 1608 1609tools/%: FORCE 1610 $(Q)mkdir -p $(objtree)/tools 1611 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $* 1612 1613# Single targets 1614# --------------------------------------------------------------------------- 1615# Single targets are compatible with: 1616# - build with mixed source and output 1617# - build with separate output dir 'make O=...' 1618# - external modules 1619# 1620# target-dir => where to store outputfile 1621# build-dir => directory in kernel source tree to use 1622 1623ifeq ($(KBUILD_EXTMOD),) 1624 build-dir = $(patsubst %/,%,$(dir $@)) 1625 target-dir = $(dir $@) 1626else 1627 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1628 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1629 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1630endif 1631 1632%.s: %.c prepare scripts FORCE 1633 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1634%.i: %.c prepare scripts FORCE 1635 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1636%.o: %.c prepare scripts FORCE 1637 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1638%.lst: %.c prepare scripts FORCE 1639 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1640%.s: %.S prepare scripts FORCE 1641 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1642%.o: %.S prepare scripts FORCE 1643 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1644%.symtypes: %.c prepare scripts FORCE 1645 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1646 1647# Modules 1648/: prepare scripts FORCE 1649 $(cmd_crmodverdir) 1650 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1651 $(build)=$(build-dir) 1652# Make sure the latest headers are built for Documentation 1653Documentation/ samples/: headers_install 1654%/: prepare scripts FORCE 1655 $(cmd_crmodverdir) 1656 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1657 $(build)=$(build-dir) 1658%.ko: prepare scripts FORCE 1659 $(cmd_crmodverdir) 1660 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1661 $(build)=$(build-dir) $(@:.ko=.o) 1662 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1663 1664# FIXME Should go into a make.lib or something 1665# =========================================================================== 1666 1667quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1668 cmd_rmdirs = rm -rf $(rm-dirs) 1669 1670quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1671 cmd_rmfiles = rm -f $(rm-files) 1672 1673# Run depmod only if we have System.map and depmod is executable 1674quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1675 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1676 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" 1677 1678# Create temporary dir for module support files 1679# clean it up only when building all modules 1680cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1681 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1682 1683# read all saved command lines 1684 1685targets := $(wildcard $(sort $(targets))) 1686cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1687 1688ifneq ($(cmd_files),) 1689 $(cmd_files): ; # Do not try to update included dependency files 1690 include $(cmd_files) 1691endif 1692 1693endif # skip-makefile 1694 1695PHONY += FORCE 1696FORCE: 1697 1698# Declare the contents of the .PHONY variable as phony. We keep that 1699# information in a variable so we can use it in if_changed and friends. 1700.PHONY: $(PHONY) 1701