1VERSION = 4 2PATCHLEVEL = 9 3SUBLEVEL = 0 4EXTRAVERSION = -rc7 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 -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# The all: target is the default when no target is given on the 611# command line. 612# This allow a user to issue only 'make' to build a kernel including modules 613# Defaults to vmlinux, but the arch makefile usually adds further targets 614all: vmlinux 615 616# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 617# values of the respective KBUILD_* variables 618ARCH_CPPFLAGS := 619ARCH_AFLAGS := 620ARCH_CFLAGS := 621include arch/$(SRCARCH)/Makefile 622 623KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 624KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 625 626ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 627KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,) 628KBUILD_CFLAGS += $(call cc-option,-fdata-sections,) 629endif 630 631ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 632KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) 633else 634ifdef CONFIG_PROFILE_ALL_BRANCHES 635KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) 636else 637KBUILD_CFLAGS += -O2 638endif 639endif 640 641KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ 642 $(call cc-disable-warning,maybe-uninitialized,)) 643 644# Tell gcc to never replace conditional load with a non-conditional one 645KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 646 647include scripts/Makefile.gcc-plugins 648 649ifdef CONFIG_READABLE_ASM 650# Disable optimizations that make assembler listings hard to read. 651# reorder blocks reorders the control in the function 652# ipa clone creates specialized cloned functions 653# partial inlining inlines only parts of functions 654KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 655 $(call cc-option,-fno-ipa-cp-clone,) \ 656 $(call cc-option,-fno-partial-inlining) 657endif 658 659ifneq ($(CONFIG_FRAME_WARN),0) 660KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 661endif 662 663# This selects the stack protector compiler flag. Testing it is delayed 664# until after .config has been reprocessed, in the prepare-compiler-check 665# target. 666ifdef CONFIG_CC_STACKPROTECTOR_REGULAR 667 stackp-flag := -fstack-protector 668 stackp-name := REGULAR 669else 670ifdef CONFIG_CC_STACKPROTECTOR_STRONG 671 stackp-flag := -fstack-protector-strong 672 stackp-name := STRONG 673else 674 # Force off for distro compilers that enable stack protector by default. 675 stackp-flag := $(call cc-option, -fno-stack-protector) 676endif 677endif 678# Find arch-specific stack protector compiler sanity-checking script. 679ifdef CONFIG_CC_STACKPROTECTOR 680 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh 681 stackp-check := $(wildcard $(stackp-path)) 682endif 683KBUILD_CFLAGS += $(stackp-flag) 684 685ifeq ($(cc-name),clang) 686KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) 687KBUILD_CPPFLAGS += $(call cc-option,-Wno-unknown-warning-option,) 688KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable) 689KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) 690KBUILD_CFLAGS += $(call cc-disable-warning, gnu) 691# Quiet clang warning: comparison of unsigned expression < 0 is always false 692KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare) 693# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 694# source of a reference will be _MergedGlobals and not on of the whitelisted names. 695# See modpost pattern 2 696KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,) 697KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior) 698else 699 700# These warnings generated too much noise in a regular build. 701# Use make W=1 to enable them (see scripts/Makefile.build) 702KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 703KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 704endif 705 706ifdef CONFIG_FRAME_POINTER 707KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 708else 709# Some targets (ARM with Thumb2, for example), can't be built with frame 710# pointers. For those, we don't have FUNCTION_TRACER automatically 711# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 712# incompatible with -fomit-frame-pointer with current GCC, so we don't use 713# -fomit-frame-pointer with FUNCTION_TRACER. 714ifndef CONFIG_FUNCTION_TRACER 715KBUILD_CFLAGS += -fomit-frame-pointer 716endif 717endif 718 719KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) 720 721ifdef CONFIG_DEBUG_INFO 722ifdef CONFIG_DEBUG_INFO_SPLIT 723KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) 724else 725KBUILD_CFLAGS += -g 726endif 727KBUILD_AFLAGS += -Wa,-gdwarf-2 728endif 729ifdef CONFIG_DEBUG_INFO_DWARF4 730KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) 731endif 732 733ifdef CONFIG_DEBUG_INFO_REDUCED 734KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 735 $(call cc-option,-fno-var-tracking) 736endif 737 738ifdef CONFIG_FUNCTION_TRACER 739ifndef CC_FLAGS_FTRACE 740CC_FLAGS_FTRACE := -pg 741endif 742export CC_FLAGS_FTRACE 743ifdef CONFIG_HAVE_FENTRY 744CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 745endif 746KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY) 747KBUILD_AFLAGS += $(CC_USING_FENTRY) 748ifdef CONFIG_DYNAMIC_FTRACE 749 ifdef CONFIG_HAVE_C_RECORDMCOUNT 750 BUILD_C_RECORDMCOUNT := y 751 export BUILD_C_RECORDMCOUNT 752 endif 753endif 754endif 755 756# We trigger additional mismatches with less inlining 757ifdef CONFIG_DEBUG_SECTION_MISMATCH 758KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 759endif 760 761# arch Makefile may override CC so keep this after arch Makefile is included 762NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 763CHECKFLAGS += $(NOSTDINC_FLAGS) 764 765# warn about C99 declaration after statement 766KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 767 768# disable pointer signed / unsigned warnings in gcc 4.0 769KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 770 771# disable invalid "can't wrap" optimizations for signed / pointers 772KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 773 774# conserve stack if available 775KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 776 777# disallow errors like 'EXPORT_GPL(foo);' with missing header 778KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) 779 780# require functions to have arguments in prototypes, not empty 'int foo()' 781KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) 782 783# Prohibit date/time macros, which would make the build non-deterministic 784KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 785 786# enforce correct pointer usage 787KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 788 789# use the deterministic mode of AR if available 790KBUILD_ARFLAGS := $(call ar-option,D) 791 792# check for 'asm goto' 793ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 794 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 795 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO 796endif 797 798include scripts/Makefile.kasan 799include scripts/Makefile.extrawarn 800include scripts/Makefile.ubsan 801 802# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 803# last assignments 804KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 805KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 806KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 807 808# Use --build-id when available. 809LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 810 $(call cc-ldoption, -Wl$(comma)--build-id,)) 811KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 812LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 813 814ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 815LDFLAGS_vmlinux += $(call ld-option, --gc-sections,) 816endif 817 818ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 819LDFLAGS_vmlinux += $(call ld-option, -X,) 820endif 821 822# Default kernel image to build when no specific target is given. 823# KBUILD_IMAGE may be overruled on the command line or 824# set in the environment 825# Also any assignments in arch/$(ARCH)/Makefile take precedence over 826# this default value 827export KBUILD_IMAGE ?= vmlinux 828 829# 830# INSTALL_PATH specifies where to place the updated kernel and system map 831# images. Default is /boot, but you can set it to other values 832export INSTALL_PATH ?= /boot 833 834# 835# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 836# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 837# an argument if needed. Otherwise it defaults to the kernel install path 838# 839export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 840 841# 842# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 843# relocations required by build roots. This is not defined in the 844# makefile but the argument can be passed to make if needed. 845# 846 847MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 848export MODLIB 849 850# 851# INSTALL_MOD_STRIP, if defined, will cause modules to be 852# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 853# the default option --strip-debug will be used. Otherwise, 854# INSTALL_MOD_STRIP value will be used as the options to the strip command. 855 856ifdef INSTALL_MOD_STRIP 857ifeq ($(INSTALL_MOD_STRIP),1) 858mod_strip_cmd = $(STRIP) --strip-debug 859else 860mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 861endif # INSTALL_MOD_STRIP=1 862else 863mod_strip_cmd = true 864endif # INSTALL_MOD_STRIP 865export mod_strip_cmd 866 867# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 868# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 869# or CONFIG_MODULE_COMPRESS_XZ. 870 871mod_compress_cmd = true 872ifdef CONFIG_MODULE_COMPRESS 873 ifdef CONFIG_MODULE_COMPRESS_GZIP 874 mod_compress_cmd = gzip -n -f 875 endif # CONFIG_MODULE_COMPRESS_GZIP 876 ifdef CONFIG_MODULE_COMPRESS_XZ 877 mod_compress_cmd = xz -f 878 endif # CONFIG_MODULE_COMPRESS_XZ 879endif # CONFIG_MODULE_COMPRESS 880export mod_compress_cmd 881 882# Select initial ramdisk compression format, default is gzip(1). 883# This shall be used by the dracut(8) tool while creating an initramfs image. 884# 885INITRD_COMPRESS-y := gzip 886INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 887INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma 888INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz 889INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo 890INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 891# do not export INITRD_COMPRESS, since we didn't actually 892# choose a sane default compression above. 893# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) 894 895ifdef CONFIG_MODULE_SIG_ALL 896$(eval $(call config_filename,MODULE_SIG_KEY)) 897 898mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 899else 900mod_sign_cmd = true 901endif 902export mod_sign_cmd 903 904 905ifeq ($(KBUILD_EXTMOD),) 906core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 907 908vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 909 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 910 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 911 912vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 913 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) 914 915init-y := $(patsubst %/, %/built-in.o, $(init-y)) 916core-y := $(patsubst %/, %/built-in.o, $(core-y)) 917drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 918net-y := $(patsubst %/, %/built-in.o, $(net-y)) 919libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 920libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 921libs-y := $(libs-y1) $(libs-y2) 922virt-y := $(patsubst %/, %/built-in.o, $(virt-y)) 923 924# Externally visible symbols (used by link-vmlinux.sh) 925export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 926export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) $(virt-y) 927export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 928export LDFLAGS_vmlinux 929# used by scripts/pacmage/Makefile 930export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) 931 932vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) 933 934# Include targets which we want to execute sequentially if the rest of the 935# kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be 936# evaluated more than once. 937PHONY += vmlinux_prereq 938vmlinux_prereq: $(vmlinux-deps) FORCE 939ifdef CONFIG_HEADERS_CHECK 940 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 941endif 942ifdef CONFIG_GDB_SCRIPTS 943 $(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py 944endif 945ifdef CONFIG_TRIM_UNUSED_KSYMS 946 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 947 "$(MAKE) KBUILD_MODULES=1 -f $(srctree)/Makefile vmlinux_prereq" 948endif 949 950# standalone target for easier testing 951include/generated/autoksyms.h: FORCE 952 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true 953 954ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 955 956# Final link of vmlinux with optional arch pass after final link 957 cmd_link-vmlinux = \ 958 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \ 959 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 960 961vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE 962 +$(call if_changed,link-vmlinux) 963 964# Build samples along the rest of the kernel 965ifdef CONFIG_SAMPLES 966vmlinux-dirs += samples 967endif 968 969# The actual objects are generated when descending, 970# make sure no implicit rule kicks in 971$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 972 973# Handle descending into subdirectories listed in $(vmlinux-dirs) 974# Preset locale variables to speed up the build process. Limit locale 975# tweaks to this spot to avoid wrong language settings when running 976# make menuconfig etc. 977# Error messages still appears in the original language 978 979PHONY += $(vmlinux-dirs) 980$(vmlinux-dirs): prepare scripts 981 $(Q)$(MAKE) $(build)=$@ 982 983define filechk_kernel.release 984 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 985endef 986 987# Store (new) KERNELRELEASE string in include/config/kernel.release 988include/config/kernel.release: include/config/auto.conf FORCE 989 $(call filechk,kernel.release) 990 991 992# Things we need to do before we recursively start building the kernel 993# or the modules are listed in "prepare". 994# A multi level approach is used. prepareN is processed before prepareN-1. 995# archprepare is used in arch Makefiles and when processed asm symlink, 996# version.h and scripts_basic is processed / created. 997 998# Listed in dependency order 999PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 1000 1001# prepare3 is used to check if we are building in a separate output directory, 1002# and if so do: 1003# 1) Check that make has not been executed in the kernel src $(srctree) 1004prepare3: include/config/kernel.release 1005ifneq ($(KBUILD_SRC),) 1006 @$(kecho) ' Using $(srctree) as source for kernel' 1007 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 1008 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 1009 echo >&2 " in the '$(srctree)' directory.";\ 1010 /bin/false; \ 1011 fi; 1012endif 1013 1014# prepare2 creates a makefile if using a separate output directory. 1015# From this point forward, .config has been reprocessed, so any rules 1016# that need to depend on updated CONFIG_* values can be checked here. 1017prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic 1018 1019prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ 1020 include/config/auto.conf 1021 $(cmd_crmodverdir) 1022 $(Q)test -e include/generated/autoksyms.h || \ 1023 touch include/generated/autoksyms.h 1024 1025archprepare: archheaders archscripts prepare1 scripts_basic 1026 1027prepare0: archprepare gcc-plugins 1028 $(Q)$(MAKE) $(build)=. 1029 1030# All the preparing.. 1031prepare: prepare0 prepare-objtool 1032 1033ifdef CONFIG_STACK_VALIDATION 1034 has_libelf := $(call try-run,\ 1035 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0) 1036 ifeq ($(has_libelf),1) 1037 objtool_target := tools/objtool FORCE 1038 else 1039 $(warning "Cannot use CONFIG_STACK_VALIDATION, please install libelf-dev, libelf-devel or elfutils-libelf-devel") 1040 SKIP_STACK_VALIDATION := 1 1041 export SKIP_STACK_VALIDATION 1042 endif 1043endif 1044 1045PHONY += prepare-objtool 1046prepare-objtool: $(objtool_target) 1047 1048# Check for CONFIG flags that require compiler support. Abort the build 1049# after .config has been processed, but before the kernel build starts. 1050# 1051# For security-sensitive CONFIG options, we don't want to fallback and/or 1052# silently change which compiler flags will be used, since that leads to 1053# producing kernels with different security feature characteristics 1054# depending on the compiler used. (For example, "But I selected 1055# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!") 1056PHONY += prepare-compiler-check 1057prepare-compiler-check: FORCE 1058# Make sure compiler supports requested stack protector flag. 1059ifdef stackp-name 1060 ifeq ($(call cc-option, $(stackp-flag)),) 1061 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1062 $(stackp-flag) not supported by compiler >&2 && exit 1 1063 endif 1064endif 1065# Make sure compiler does not have buggy stack-protector support. 1066ifdef stackp-check 1067 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) 1068 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ 1069 $(stackp-flag) available but compiler is broken >&2 && exit 1 1070 endif 1071endif 1072 @: 1073 1074# Generate some files 1075# --------------------------------------------------------------------------- 1076 1077# KERNELRELEASE can change from a few different places, meaning version.h 1078# needs to be updated, so this check is forced on all builds 1079 1080uts_len := 64 1081define filechk_utsrelease.h 1082 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1083 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1084 exit 1; \ 1085 fi; \ 1086 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1087endef 1088 1089define filechk_version.h 1090 (echo \#define LINUX_VERSION_CODE $(shell \ 1091 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1092 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1093endef 1094 1095$(version_h): $(srctree)/Makefile FORCE 1096 $(call filechk,version.h) 1097 $(Q)rm -f $(old_version_h) 1098 1099include/generated/utsrelease.h: include/config/kernel.release FORCE 1100 $(call filechk,utsrelease.h) 1101 1102PHONY += headerdep 1103headerdep: 1104 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1105 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1106 1107# --------------------------------------------------------------------------- 1108# Firmware install 1109INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1110export INSTALL_FW_PATH 1111 1112PHONY += firmware_install 1113firmware_install: 1114 @mkdir -p $(objtree)/firmware 1115 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1116 1117# --------------------------------------------------------------------------- 1118# Kernel headers 1119 1120#Default location for installed headers 1121export INSTALL_HDR_PATH = $(objtree)/usr 1122 1123# If we do an all arch process set dst to asm-$(hdr-arch) 1124hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1125 1126PHONY += archheaders 1127archheaders: 1128 1129PHONY += archscripts 1130archscripts: 1131 1132PHONY += __headers 1133__headers: $(version_h) scripts_basic asm-generic archheaders archscripts 1134 $(Q)$(MAKE) $(build)=scripts build_unifdef 1135 1136PHONY += headers_install_all 1137headers_install_all: 1138 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1139 1140PHONY += headers_install 1141headers_install: __headers 1142 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ 1143 $(error Headers not exportable for the $(SRCARCH) architecture)) 1144 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1145 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) 1146 1147PHONY += headers_check_all 1148headers_check_all: headers_install_all 1149 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1150 1151PHONY += headers_check 1152headers_check: headers_install 1153 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 1154 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 1155 1156# --------------------------------------------------------------------------- 1157# Kernel selftest 1158 1159PHONY += kselftest 1160kselftest: 1161 $(Q)$(MAKE) -C tools/testing/selftests run_tests 1162 1163kselftest-clean: 1164 $(Q)$(MAKE) -C tools/testing/selftests clean 1165 1166PHONY += kselftest-merge 1167kselftest-merge: 1168 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1169 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 1170 -m $(objtree)/.config \ 1171 $(srctree)/tools/testing/selftests/*/config 1172 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1173 1174# --------------------------------------------------------------------------- 1175# Modules 1176 1177ifdef CONFIG_MODULES 1178 1179# By default, build modules as well 1180 1181all: modules 1182 1183# Build modules 1184# 1185# A module can be listed more than once in obj-m resulting in 1186# duplicate lines in modules.order files. Those are removed 1187# using awk while concatenating to the final file. 1188 1189PHONY += modules 1190modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1191 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1192 @$(kecho) ' Building modules, stage 2.'; 1193 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1194 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1195 1196modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1197 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1198 1199%/modules.builtin: include/config/auto.conf 1200 $(Q)$(MAKE) $(modbuiltin)=$* 1201 1202 1203# Target to prepare building external modules 1204PHONY += modules_prepare 1205modules_prepare: prepare scripts 1206 1207# Target to install modules 1208PHONY += modules_install 1209modules_install: _modinst_ _modinst_post 1210 1211PHONY += _modinst_ 1212_modinst_: 1213 @rm -rf $(MODLIB)/kernel 1214 @rm -f $(MODLIB)/source 1215 @mkdir -p $(MODLIB)/kernel 1216 @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source 1217 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1218 rm -f $(MODLIB)/build ; \ 1219 ln -s $(CURDIR) $(MODLIB)/build ; \ 1220 fi 1221 @cp -f $(objtree)/modules.order $(MODLIB)/ 1222 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1223 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1224 1225# This depmod is only for convenience to give the initial 1226# boot a modules.dep even before / is mounted read-write. However the 1227# boot script depmod is the master version. 1228PHONY += _modinst_post 1229_modinst_post: _modinst_ 1230 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1231 $(call cmd,depmod) 1232 1233ifeq ($(CONFIG_MODULE_SIG), y) 1234PHONY += modules_sign 1235modules_sign: 1236 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1237endif 1238 1239else # CONFIG_MODULES 1240 1241# Modules not configured 1242# --------------------------------------------------------------------------- 1243 1244PHONY += modules modules_install 1245modules modules_install: 1246 @echo >&2 1247 @echo >&2 "The present kernel configuration has modules disabled." 1248 @echo >&2 "Type 'make config' and enable loadable module support." 1249 @echo >&2 "Then build a kernel with module support enabled." 1250 @echo >&2 1251 @exit 1 1252 1253endif # CONFIG_MODULES 1254 1255### 1256# Cleaning is done on three levels. 1257# make clean Delete most generated files 1258# Leave enough to build external modules 1259# make mrproper Delete the current configuration, and all generated files 1260# make distclean Remove editor backup files, patch leftover files and the like 1261 1262# Directories & files removed with 'make clean' 1263CLEAN_DIRS += $(MODVERDIR) 1264 1265# Directories & files removed with 'make mrproper' 1266MRPROPER_DIRS += include/config usr/include include/generated \ 1267 arch/*/include/generated .tmp_objdiff 1268MRPROPER_FILES += .config .config.old .version .old_version \ 1269 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1270 signing_key.pem signing_key.priv signing_key.x509 \ 1271 x509.genkey extra_certificates signing_key.x509.keyid \ 1272 signing_key.x509.signer vmlinux-gdb.py 1273 1274# clean - Delete most, but leave enough to build external modules 1275# 1276clean: rm-dirs := $(CLEAN_DIRS) 1277clean: rm-files := $(CLEAN_FILES) 1278clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1279 1280PHONY += $(clean-dirs) clean archclean vmlinuxclean 1281$(clean-dirs): 1282 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1283 1284vmlinuxclean: 1285 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1286 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1287 1288clean: archclean vmlinuxclean 1289 1290# mrproper - Delete all generated files, including .config 1291# 1292mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1293mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1294mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1295 1296PHONY += $(mrproper-dirs) mrproper archmrproper 1297$(mrproper-dirs): 1298 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1299 1300mrproper: clean archmrproper $(mrproper-dirs) 1301 $(call cmd,rmdirs) 1302 $(call cmd,rmfiles) 1303 1304# distclean 1305# 1306PHONY += distclean 1307 1308distclean: mrproper 1309 @find $(srctree) $(RCS_FIND_IGNORE) \ 1310 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1311 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1312 -o -name '.*.rej' -o -name '*%' -o -name 'core' \) \ 1313 -type f -print | xargs rm -f 1314 1315 1316# Packaging of the kernel to various formats 1317# --------------------------------------------------------------------------- 1318# rpm target kept for backward compatibility 1319package-dir := scripts/package 1320 1321%src-pkg: FORCE 1322 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1323%pkg: include/config/kernel.release FORCE 1324 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1325rpm: include/config/kernel.release FORCE 1326 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1327 1328 1329# Brief documentation of the typical targets used 1330# --------------------------------------------------------------------------- 1331 1332boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1333boards := $(sort $(notdir $(boards))) 1334board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1335board-dirs := $(sort $(notdir $(board-dirs:/=))) 1336 1337PHONY += help 1338help: 1339 @echo 'Cleaning targets:' 1340 @echo ' clean - Remove most generated files but keep the config and' 1341 @echo ' enough build support to build external modules' 1342 @echo ' mrproper - Remove all generated files + config + various backup files' 1343 @echo ' distclean - mrproper + remove editor backup and patch files' 1344 @echo '' 1345 @echo 'Configuration targets:' 1346 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1347 @echo '' 1348 @echo 'Other generic targets:' 1349 @echo ' all - Build all targets marked with [*]' 1350 @echo '* vmlinux - Build the bare kernel' 1351 @echo '* modules - Build all modules' 1352 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1353 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1354 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1355 @echo ' dir/ - Build all files in dir and below' 1356 @echo ' dir/file.[ois] - Build specified target only' 1357 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1358 @echo ' (requires a recent binutils and recent build (System.map))' 1359 @echo ' dir/file.ko - Build module including final link' 1360 @echo ' modules_prepare - Set up for building external modules' 1361 @echo ' tags/TAGS - Generate tags file for editors' 1362 @echo ' cscope - Generate cscope index' 1363 @echo ' gtags - Generate GNU GLOBAL index' 1364 @echo ' kernelrelease - Output the release version string (use with make -s)' 1365 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1366 @echo ' image_name - Output the image name (use with make -s)' 1367 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1368 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1369 echo '' 1370 @echo 'Static analysers' 1371 @echo ' checkstack - Generate a list of stack hogs' 1372 @echo ' namespacecheck - Name space analysis on compiled kernel' 1373 @echo ' versioncheck - Sanity check on version.h usage' 1374 @echo ' includecheck - Check for duplicate included header files' 1375 @echo ' export_report - List the usages of all exported symbols' 1376 @echo ' headers_check - Sanity check on exported headers' 1377 @echo ' headerdep - Detect inclusion cycles in headers' 1378 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1379 @echo '' 1380 @echo 'Kernel selftest' 1381 @echo ' kselftest - Build and run kernel selftest (run as root)' 1382 @echo ' Build, install, and boot kernel before' 1383 @echo ' running kselftest on it' 1384 @echo ' kselftest-clean - Remove all generated kselftest files' 1385 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed' 1386 @echo ' .config.' 1387 @echo '' 1388 @echo 'Kernel packaging:' 1389 @$(MAKE) $(build)=$(package-dir) help 1390 @echo '' 1391 @echo 'Documentation targets:' 1392 @$(MAKE) -f $(srctree)/Documentation/Makefile.sphinx dochelp 1393 @echo '' 1394 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1395 @echo '' 1396 @echo 'Architecture specific targets ($(SRCARCH)):' 1397 @$(if $(archhelp),$(archhelp),\ 1398 echo ' No architecture specific help defined for $(SRCARCH)') 1399 @echo '' 1400 @$(if $(boards), \ 1401 $(foreach b, $(boards), \ 1402 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1403 echo '') 1404 @$(if $(board-dirs), \ 1405 $(foreach b, $(board-dirs), \ 1406 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1407 printf " %-16s - Show all of the above\\n" help-boards; \ 1408 echo '') 1409 1410 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1411 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1412 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1413 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1414 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1415 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1416 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1417 @echo ' 1: warnings which may be relevant and do not occur too often' 1418 @echo ' 2: warnings which occur quite often but may still be relevant' 1419 @echo ' 3: more obscure warnings, can most likely be ignored' 1420 @echo ' Multiple levels can be combined with W=12 or W=123' 1421 @echo '' 1422 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1423 @echo 'For further info see the ./README file' 1424 1425 1426help-board-dirs := $(addprefix help-,$(board-dirs)) 1427 1428help-boards: $(help-board-dirs) 1429 1430boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1431 1432$(help-board-dirs): help-%: 1433 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1434 @$(if $(boards-per-dir), \ 1435 $(foreach b, $(boards-per-dir), \ 1436 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1437 echo '') 1438 1439 1440# Documentation targets 1441# --------------------------------------------------------------------------- 1442DOC_TARGETS := xmldocs sgmldocs psdocs latexdocs pdfdocs htmldocs mandocs installmandocs epubdocs cleandocs 1443PHONY += $(DOC_TARGETS) 1444$(DOC_TARGETS): scripts_basic FORCE 1445 $(Q)$(MAKE) $(build)=scripts build_docproc build_check-lc_ctype 1446 $(Q)$(MAKE) $(build)=Documentation -f $(srctree)/Documentation/Makefile.sphinx $@ 1447 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1448 1449else # KBUILD_EXTMOD 1450 1451### 1452# External module support. 1453# When building external modules the kernel used as basis is considered 1454# read-only, and no consistency checks are made and the make 1455# system is not used on the basis kernel. If updates are required 1456# in the basis kernel ordinary make commands (without M=...) must 1457# be used. 1458# 1459# The following are the only valid targets when building external 1460# modules. 1461# make M=dir clean Delete all automatically generated files 1462# make M=dir modules Make all modules in specified dir 1463# make M=dir Same as 'make M=dir modules' 1464# make M=dir modules_install 1465# Install the modules built in the module directory 1466# Assumes install directory is already created 1467 1468# We are always building modules 1469KBUILD_MODULES := 1 1470PHONY += crmodverdir 1471crmodverdir: 1472 $(cmd_crmodverdir) 1473 1474PHONY += $(objtree)/Module.symvers 1475$(objtree)/Module.symvers: 1476 @test -e $(objtree)/Module.symvers || ( \ 1477 echo; \ 1478 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1479 echo " is missing; modules will have no dependencies and modversions."; \ 1480 echo ) 1481 1482module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1483PHONY += $(module-dirs) modules 1484$(module-dirs): crmodverdir $(objtree)/Module.symvers 1485 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1486 1487modules: $(module-dirs) 1488 @$(kecho) ' Building modules, stage 2.'; 1489 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1490 1491PHONY += modules_install 1492modules_install: _emodinst_ _emodinst_post 1493 1494install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1495PHONY += _emodinst_ 1496_emodinst_: 1497 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1498 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1499 1500PHONY += _emodinst_post 1501_emodinst_post: _emodinst_ 1502 $(call cmd,depmod) 1503 1504clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1505 1506PHONY += $(clean-dirs) clean 1507$(clean-dirs): 1508 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1509 1510clean: rm-dirs := $(MODVERDIR) 1511clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1512 1513PHONY += help 1514help: 1515 @echo ' Building external modules.' 1516 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1517 @echo '' 1518 @echo ' modules - default target, build the module(s)' 1519 @echo ' modules_install - install the module' 1520 @echo ' clean - remove generated files in module directory only' 1521 @echo '' 1522 1523# Dummies... 1524PHONY += prepare scripts 1525prepare: ; 1526scripts: ; 1527endif # KBUILD_EXTMOD 1528 1529clean: $(clean-dirs) 1530 $(call cmd,rmdirs) 1531 $(call cmd,rmfiles) 1532 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1533 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1534 -o -name '*.ko.*' \ 1535 -o -name '*.dwo' \ 1536 -o -name '*.su' \ 1537 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1538 -o -name '*.symtypes' -o -name 'modules.order' \ 1539 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1540 -o -name '*.c.[012]*.*' \ 1541 -o -name '*.gcno' \) -type f -print | xargs rm -f 1542 1543# Generate tags for editors 1544# --------------------------------------------------------------------------- 1545quiet_cmd_tags = GEN $@ 1546 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1547 1548tags TAGS cscope gtags: FORCE 1549 $(call cmd,tags) 1550 1551# Scripts to check various things for consistency 1552# --------------------------------------------------------------------------- 1553 1554PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1555 1556includecheck: 1557 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1558 -name '*.[hcS]' -type f -print | sort \ 1559 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1560 1561versioncheck: 1562 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1563 -name '*.[hcS]' -type f -print | sort \ 1564 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1565 1566coccicheck: 1567 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1568 1569namespacecheck: 1570 $(PERL) $(srctree)/scripts/namespace.pl 1571 1572export_report: 1573 $(PERL) $(srctree)/scripts/export_report.pl 1574 1575endif #ifeq ($(config-targets),1) 1576endif #ifeq ($(mixed-targets),1) 1577 1578PHONY += checkstack kernelrelease kernelversion image_name 1579 1580# UML needs a little special treatment here. It wants to use the host 1581# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1582# else wants $(ARCH), including people doing cross-builds, which means 1583# that $(SUBARCH) doesn't work here. 1584ifeq ($(ARCH), um) 1585CHECKSTACK_ARCH := $(SUBARCH) 1586else 1587CHECKSTACK_ARCH := $(ARCH) 1588endif 1589checkstack: 1590 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1591 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1592 1593kernelrelease: 1594 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1595 1596kernelversion: 1597 @echo $(KERNELVERSION) 1598 1599image_name: 1600 @echo $(KBUILD_IMAGE) 1601 1602# Clear a bunch of variables before executing the submake 1603tools/: FORCE 1604 $(Q)mkdir -p $(objtree)/tools 1605 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ 1606 1607tools/%: FORCE 1608 $(Q)mkdir -p $(objtree)/tools 1609 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $* 1610 1611# Single targets 1612# --------------------------------------------------------------------------- 1613# Single targets are compatible with: 1614# - build with mixed source and output 1615# - build with separate output dir 'make O=...' 1616# - external modules 1617# 1618# target-dir => where to store outputfile 1619# build-dir => directory in kernel source tree to use 1620 1621ifeq ($(KBUILD_EXTMOD),) 1622 build-dir = $(patsubst %/,%,$(dir $@)) 1623 target-dir = $(dir $@) 1624else 1625 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1626 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1627 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1628endif 1629 1630%.s: %.c prepare scripts FORCE 1631 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1632%.i: %.c prepare scripts FORCE 1633 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1634%.o: %.c prepare scripts FORCE 1635 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1636%.lst: %.c prepare scripts FORCE 1637 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1638%.s: %.S prepare scripts FORCE 1639 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1640%.o: %.S prepare scripts FORCE 1641 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1642%.symtypes: %.c prepare scripts FORCE 1643 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1644 1645# Modules 1646/: prepare scripts FORCE 1647 $(cmd_crmodverdir) 1648 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1649 $(build)=$(build-dir) 1650# Make sure the latest headers are built for Documentation 1651Documentation/ samples/: headers_install 1652%/: prepare scripts FORCE 1653 $(cmd_crmodverdir) 1654 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1655 $(build)=$(build-dir) 1656%.ko: prepare scripts FORCE 1657 $(cmd_crmodverdir) 1658 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1659 $(build)=$(build-dir) $(@:.ko=.o) 1660 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1661 1662# FIXME Should go into a make.lib or something 1663# =========================================================================== 1664 1665quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1666 cmd_rmdirs = rm -rf $(rm-dirs) 1667 1668quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1669 cmd_rmfiles = rm -f $(rm-files) 1670 1671# Run depmod only if we have System.map and depmod is executable 1672quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1673 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1674 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))" 1675 1676# Create temporary dir for module support files 1677# clean it up only when building all modules 1678cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1679 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1680 1681# read all saved command lines 1682 1683targets := $(wildcard $(sort $(targets))) 1684cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1685 1686ifneq ($(cmd_files),) 1687 $(cmd_files): ; # Do not try to update included dependency files 1688 include $(cmd_files) 1689endif 1690 1691endif # skip-makefile 1692 1693PHONY += FORCE 1694FORCE: 1695 1696# Declare the contents of the .PHONY variable as phony. We keep that 1697# information in a variable so we can use it in if_changed and friends. 1698.PHONY: $(PHONY) 1699