1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 32 4EXTRAVERSION = 5NAME = Man-Eating Seals of Antiquity 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# Do not: 14# o use make's built-in rules and variables 15# (this increases performance and avoids hard-to-debug behaviour); 16# o print "Entering directory ..."; 17MAKEFLAGS += -rR --no-print-directory 18 19# We are using a recursive build, so we need to do a little thinking 20# to get the ordering right. 21# 22# Most importantly: sub-Makefiles should only ever modify files in 23# their own directory. If in some directory we have a dependency on 24# a file in another dir (which doesn't happen often, but it's often 25# unavoidable when linking the built-in.o targets which finally 26# turn into vmlinux), we will call a sub make in that other dir, and 27# after that we are sure that everything which is in that other dir 28# is now up to date. 29# 30# The only cases where we need to modify files which have global 31# effects are thus separated out and done before the recursive 32# descending is started. They are now explicitly listed as the 33# prepare rule. 34 35# To put more focus on warnings, be less verbose as default 36# Use 'make V=1' to see the full commands 37 38ifeq ("$(origin V)", "command line") 39 KBUILD_VERBOSE = $(V) 40endif 41ifndef KBUILD_VERBOSE 42 KBUILD_VERBOSE = 0 43endif 44 45# Call a source code checker (by default, "sparse") as part of the 46# C compilation. 47# 48# Use 'make C=1' to enable checking of only re-compiled files. 49# Use 'make C=2' to enable checking of *all* source files, regardless 50# of whether they are re-compiled or not. 51# 52# See the file "Documentation/sparse.txt" for more details, including 53# where to get the "sparse" utility. 54 55ifeq ("$(origin C)", "command line") 56 KBUILD_CHECKSRC = $(C) 57endif 58ifndef KBUILD_CHECKSRC 59 KBUILD_CHECKSRC = 0 60endif 61 62# Use make M=dir to specify directory of external module to build 63# Old syntax make ... SUBDIRS=$PWD is still supported 64# Setting the environment variable KBUILD_EXTMOD take precedence 65ifdef SUBDIRS 66 KBUILD_EXTMOD ?= $(SUBDIRS) 67endif 68 69ifeq ("$(origin M)", "command line") 70 KBUILD_EXTMOD := $(M) 71endif 72 73# kbuild supports saving output files in a separate directory. 74# To locate output files in a separate directory two syntaxes are supported. 75# In both cases the working directory must be the root of the kernel src. 76# 1) O= 77# Use "make O=dir/to/store/output/files/" 78# 79# 2) Set KBUILD_OUTPUT 80# Set the environment variable KBUILD_OUTPUT to point to the directory 81# where the output files shall be placed. 82# export KBUILD_OUTPUT=dir/to/store/output/files/ 83# make 84# 85# The O= assignment takes precedence over the KBUILD_OUTPUT environment 86# variable. 87 88 89# KBUILD_SRC is set on invocation of make in OBJ directory 90# KBUILD_SRC is not intended to be used by the regular user (for now) 91ifeq ($(KBUILD_SRC),) 92 93# OK, Make called in directory where kernel src resides 94# Do we want to locate output files in a separate directory? 95ifeq ("$(origin O)", "command line") 96 KBUILD_OUTPUT := $(O) 97endif 98 99# That's our default target when none is given on the command line 100PHONY := _all 101_all: 102 103# Cancel implicit rules on top Makefile 104$(CURDIR)/Makefile Makefile: ; 105 106ifneq ($(KBUILD_OUTPUT),) 107# Invoke a second make in the output directory, passing relevant variables 108# check that the output directory actually exists 109saved-output := $(KBUILD_OUTPUT) 110KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 111$(if $(KBUILD_OUTPUT),, \ 112 $(error output directory "$(saved-output)" does not exist)) 113 114PHONY += $(MAKECMDGOALS) sub-make 115 116$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 117 $(Q)@: 118 119sub-make: FORCE 120 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 121 KBUILD_SRC=$(CURDIR) \ 122 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 123 $(filter-out _all sub-make,$(MAKECMDGOALS)) 124 125# Leave processing to above invocation of make 126skip-makefile := 1 127endif # ifneq ($(KBUILD_OUTPUT),) 128endif # ifeq ($(KBUILD_SRC),) 129 130# We process the rest of the Makefile if this is the final invocation of make 131ifeq ($(skip-makefile),) 132 133# If building an external module we do not care about the all: rule 134# but instead _all depend on modules 135PHONY += all 136ifeq ($(KBUILD_EXTMOD),) 137_all: all 138else 139_all: modules 140endif 141 142srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 143objtree := $(CURDIR) 144src := $(srctree) 145obj := $(objtree) 146 147VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 148 149export srctree objtree VPATH 150 151 152# SUBARCH tells the usermode build what the underlying arch is. That is set 153# first, and if a usermode build is happening, the "ARCH=um" on the command 154# line overrides the setting of ARCH below. If a native build is happening, 155# then ARCH is assigned, getting whatever value it gets normally, and 156# SUBARCH is subsequently ignored. 157 158SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 159 -e s/arm.*/arm/ -e s/sa110/arm/ \ 160 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 161 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 162 -e s/sh[234].*/sh/ ) 163 164# Cross compiling and selecting different set of gcc/bin-utils 165# --------------------------------------------------------------------------- 166# 167# When performing cross compilation for other architectures ARCH shall be set 168# to the target architecture. (See arch/* for the possibilities). 169# ARCH can be set during invocation of make: 170# make ARCH=ia64 171# Another way is to have ARCH set in the environment. 172# The default ARCH is the host where make is executed. 173 174# CROSS_COMPILE specify the prefix used for all executables used 175# during compilation. Only gcc and related bin-utils executables 176# are prefixed with $(CROSS_COMPILE). 177# CROSS_COMPILE can be set on the command line 178# make CROSS_COMPILE=ia64-linux- 179# Alternatively CROSS_COMPILE can be set in the environment. 180# Default value for CROSS_COMPILE is not to prefix executables 181# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 182export KBUILD_BUILDHOST := $(SUBARCH) 183ARCH ?= $(SUBARCH) 184CROSS_COMPILE ?= 185 186# Architecture as present in compile.h 187UTS_MACHINE := $(ARCH) 188SRCARCH := $(ARCH) 189 190# Additional ARCH settings for x86 191ifeq ($(ARCH),i386) 192 SRCARCH := x86 193endif 194ifeq ($(ARCH),x86_64) 195 SRCARCH := x86 196endif 197 198# Additional ARCH settings for sparc 199ifeq ($(ARCH),sparc64) 200 SRCARCH := sparc 201endif 202 203# Additional ARCH settings for sh 204ifeq ($(ARCH),sh64) 205 SRCARCH := sh 206endif 207 208# Where to locate arch specific headers 209hdr-arch := $(SRCARCH) 210 211ifeq ($(ARCH),m68knommu) 212 hdr-arch := m68k 213endif 214 215KCONFIG_CONFIG ?= .config 216 217# SHELL used by kbuild 218CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 219 else if [ -x /bin/bash ]; then echo /bin/bash; \ 220 else echo sh; fi ; fi) 221 222HOSTCC = gcc 223HOSTCXX = g++ 224HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 225HOSTCXXFLAGS = -O2 226 227# Decide whether to build built-in, modular, or both. 228# Normally, just do built-in. 229 230KBUILD_MODULES := 231KBUILD_BUILTIN := 1 232 233# If we have only "make modules", don't compile built-in objects. 234# When we're building modules with modversions, we need to consider 235# the built-in objects during the descend as well, in order to 236# make sure the checksums are up to date before we record them. 237 238ifeq ($(MAKECMDGOALS),modules) 239 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 240endif 241 242# If we have "make <whatever> modules", compile modules 243# in addition to whatever we do anyway. 244# Just "make" or "make all" shall build modules as well 245 246ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 247 KBUILD_MODULES := 1 248endif 249 250ifeq ($(MAKECMDGOALS),) 251 KBUILD_MODULES := 1 252endif 253 254export KBUILD_MODULES KBUILD_BUILTIN 255export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 256 257# Beautify output 258# --------------------------------------------------------------------------- 259# 260# Normally, we echo the whole command before executing it. By making 261# that echo $($(quiet)$(cmd)), we now have the possibility to set 262# $(quiet) to choose other forms of output instead, e.g. 263# 264# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 265# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 266# 267# If $(quiet) is empty, the whole command will be printed. 268# If it is set to "quiet_", only the short version will be printed. 269# If it is set to "silent_", nothing will be printed at all, since 270# the variable $(silent_cmd_cc_o_c) doesn't exist. 271# 272# A simple variant is to prefix commands with $(Q) - that's useful 273# for commands that shall be hidden in non-verbose mode. 274# 275# $(Q)ln $@ :< 276# 277# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 278# If KBUILD_VERBOSE equals 1 then the above command is displayed. 279 280ifeq ($(KBUILD_VERBOSE),1) 281 quiet = 282 Q = 283else 284 quiet=quiet_ 285 Q = @ 286endif 287 288# If the user is running make -s (silent mode), suppress echoing of 289# commands 290 291ifneq ($(findstring s,$(MAKEFLAGS)),) 292 quiet=silent_ 293endif 294 295export quiet Q KBUILD_VERBOSE 296 297 298# Look for make include files relative to root of kernel src 299MAKEFLAGS += --include-dir=$(srctree) 300 301# We need some generic definitions (do not try to remake the file). 302$(srctree)/scripts/Kbuild.include: ; 303include $(srctree)/scripts/Kbuild.include 304 305# Make variables (CC, etc...) 306 307AS = $(CROSS_COMPILE)as 308LD = $(CROSS_COMPILE)ld 309CC = $(CROSS_COMPILE)gcc 310CPP = $(CC) -E 311AR = $(CROSS_COMPILE)ar 312NM = $(CROSS_COMPILE)nm 313STRIP = $(CROSS_COMPILE)strip 314OBJCOPY = $(CROSS_COMPILE)objcopy 315OBJDUMP = $(CROSS_COMPILE)objdump 316AWK = awk 317GENKSYMS = scripts/genksyms/genksyms 318INSTALLKERNEL := installkernel 319DEPMOD = /sbin/depmod 320KALLSYMS = scripts/kallsyms 321PERL = perl 322CHECK = sparse 323 324CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 325 -Wbitwise -Wno-return-void $(CF) 326MODFLAGS = -DMODULE 327CFLAGS_MODULE = $(MODFLAGS) 328AFLAGS_MODULE = $(MODFLAGS) 329LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds 330CFLAGS_KERNEL = 331AFLAGS_KERNEL = 332CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 333 334 335# Use LINUXINCLUDE when you must reference the include/ directory. 336# Needed to be compatible with the O= option 337LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \ 338 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 339 -include include/generated/autoconf.h 340 341KBUILD_CPPFLAGS := -D__KERNEL__ 342 343KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 344 -fno-strict-aliasing -fno-common \ 345 -Werror-implicit-function-declaration \ 346 -Wno-format-security \ 347 -fno-delete-null-pointer-checks 348KBUILD_AFLAGS := -D__ASSEMBLY__ 349 350# Read KERNELRELEASE from include/config/kernel.release (if it exists) 351KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 352KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 353 354export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 355export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 356export CPP AR NM STRIP OBJCOPY OBJDUMP 357export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 358export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 359 360export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 361export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 362export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 363 364# When compiling out-of-tree modules, put MODVERDIR in the module 365# tree rather than in the kernel tree. The kernel tree might 366# even be read-only. 367export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 368 369# Files to ignore in find ... statements 370 371RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 372export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 373 374# =========================================================================== 375# Rules shared between *config targets and build targets 376 377# Basic helpers built in scripts/ 378PHONY += scripts_basic 379scripts_basic: 380 $(Q)$(MAKE) $(build)=scripts/basic 381 $(Q)rm -f .tmp_quiet_recordmcount 382 383# To avoid any implicit rule to kick in, define an empty command. 384scripts/basic/%: scripts_basic ; 385 386PHONY += outputmakefile 387# outputmakefile generates a Makefile in the output directory, if using a 388# separate output directory. This allows convenient use of make in the 389# output directory. 390outputmakefile: 391ifneq ($(KBUILD_SRC),) 392 $(Q)ln -fsn $(srctree) source 393 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 394 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 395endif 396 397# To make sure we do not include .config for any of the *config targets 398# catch them early, and hand them over to scripts/kconfig/Makefile 399# It is allowed to specify more targets when calling make, including 400# mixing *config targets and build targets. 401# For example 'make oldconfig all'. 402# Detect when mixed targets is specified, and make a second invocation 403# of make so .config is not included in this case either (for *config). 404 405no-dot-config-targets := clean mrproper distclean \ 406 cscope TAGS tags help %docs check% \ 407 include/linux/version.h headers_% \ 408 kernelrelease kernelversion 409 410config-targets := 0 411mixed-targets := 0 412dot-config := 1 413 414ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 415 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 416 dot-config := 0 417 endif 418endif 419 420ifeq ($(KBUILD_EXTMOD),) 421 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 422 config-targets := 1 423 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 424 mixed-targets := 1 425 endif 426 endif 427endif 428 429ifeq ($(mixed-targets),1) 430# =========================================================================== 431# We're called with mixed targets (*config and build targets). 432# Handle them one by one. 433 434%:: FORCE 435 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 436 437else 438ifeq ($(config-targets),1) 439# =========================================================================== 440# *config targets only - make sure prerequisites are updated, and descend 441# in scripts/kconfig to make the *config target 442 443# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 444# KBUILD_DEFCONFIG may point out an alternative default configuration 445# used for 'make defconfig' 446include $(srctree)/arch/$(SRCARCH)/Makefile 447export KBUILD_DEFCONFIG KBUILD_KCONFIG 448 449config: scripts_basic outputmakefile FORCE 450 $(Q)mkdir -p include/linux include/config 451 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 452 453%config: scripts_basic outputmakefile FORCE 454 $(Q)mkdir -p include/linux include/config 455 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 456 457else 458# =========================================================================== 459# Build targets only - this includes vmlinux, arch specific targets, clean 460# targets and others. In general all targets except *config targets. 461 462ifeq ($(KBUILD_EXTMOD),) 463# Additional helpers built in scripts/ 464# Carefully list dependencies so we do not try to build scripts twice 465# in parallel 466PHONY += scripts 467scripts: scripts_basic include/config/auto.conf 468 $(Q)$(MAKE) $(build)=$(@) 469 470# Objects we will link into vmlinux / subdirs we need to visit 471init-y := init/ 472drivers-y := drivers/ sound/ firmware/ 473net-y := net/ 474libs-y := lib/ 475core-y := usr/ 476endif # KBUILD_EXTMOD 477 478ifeq ($(dot-config),1) 479# Read in config 480-include include/config/auto.conf 481 482ifeq ($(KBUILD_EXTMOD),) 483# Read in dependencies to all Kconfig* files, make sure to run 484# oldconfig if changes are detected. 485-include include/config/auto.conf.cmd 486 487# To avoid any implicit rule to kick in, define an empty command 488$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 489 490# If .config is newer than include/config/auto.conf, someone tinkered 491# with it and forgot to run make oldconfig. 492# if auto.conf.cmd is missing then we are probably in a cleaned tree so 493# we execute the config step to be sure to catch updated Kconfig files 494include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 495 $(Q)mkdir -p include/generated 496 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 497else 498# external modules needs include/generated/autoconf.h and include/config/auto.conf 499# but do not care if they are up-to-date. Use auto.conf to trigger the test 500PHONY += include/config/auto.conf 501 502include/config/auto.conf: 503 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 504 echo; \ 505 echo " ERROR: Kernel configuration is invalid."; \ 506 echo " include/generated/autoconf.h or $@ are missing.";\ 507 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 508 echo; \ 509 /bin/false) 510 511endif # KBUILD_EXTMOD 512 513else 514# Dummy target needed, because used as prerequisite 515include/config/auto.conf: ; 516endif # $(dot-config) 517 518# The all: target is the default when no target is given on the 519# command line. 520# This allow a user to issue only 'make' to build a kernel including modules 521# Defaults vmlinux but it is usually overridden in the arch makefile 522all: vmlinux 523 524ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 525KBUILD_CFLAGS += -Os 526else 527KBUILD_CFLAGS += -O2 528endif 529 530include $(srctree)/arch/$(SRCARCH)/Makefile 531 532ifneq ($(CONFIG_FRAME_WARN),0) 533KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 534endif 535 536# Force gcc to behave correct even for buggy distributions 537ifndef CONFIG_CC_STACKPROTECTOR 538KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 539endif 540 541ifdef CONFIG_FRAME_POINTER 542KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 543else 544KBUILD_CFLAGS += -fomit-frame-pointer 545endif 546 547ifdef CONFIG_DEBUG_INFO 548KBUILD_CFLAGS += -g 549KBUILD_AFLAGS += -gdwarf-2 550endif 551 552ifdef CONFIG_FUNCTION_TRACER 553KBUILD_CFLAGS += -pg 554endif 555 556# We trigger additional mismatches with less inlining 557ifdef CONFIG_DEBUG_SECTION_MISMATCH 558KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 559endif 560 561# arch Makefile may override CC so keep this after arch Makefile is included 562NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 563CHECKFLAGS += $(NOSTDINC_FLAGS) 564 565# warn about C99 declaration after statement 566KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 567 568# disable pointer signed / unsigned warnings in gcc 4.0 569KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 570 571# disable invalid "can't wrap" optimizations for signed / pointers 572KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 573 574# revert to pre-gcc-4.4 behaviour of .eh_frame 575KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 576 577# conserve stack if available 578KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 579 580# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 581# But warn user when we do so 582warn-assign = \ 583$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 584 585ifneq ($(KCPPFLAGS),) 586 $(call warn-assign,CPPFLAGS) 587 KBUILD_CPPFLAGS += $(KCPPFLAGS) 588endif 589ifneq ($(KAFLAGS),) 590 $(call warn-assign,AFLAGS) 591 KBUILD_AFLAGS += $(KAFLAGS) 592endif 593ifneq ($(KCFLAGS),) 594 $(call warn-assign,CFLAGS) 595 KBUILD_CFLAGS += $(KCFLAGS) 596endif 597 598# Use --build-id when available. 599LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 600 $(call cc-ldoption, -Wl$(comma)--build-id,)) 601LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 602LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 603 604ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 605LDFLAGS_vmlinux += $(call ld-option, -X,) 606endif 607 608# Default kernel image to build when no specific target is given. 609# KBUILD_IMAGE may be overruled on the command line or 610# set in the environment 611# Also any assignments in arch/$(ARCH)/Makefile take precedence over 612# this default value 613export KBUILD_IMAGE ?= vmlinux 614 615# 616# INSTALL_PATH specifies where to place the updated kernel and system map 617# images. Default is /boot, but you can set it to other values 618export INSTALL_PATH ?= /boot 619 620# 621# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 622# relocations required by build roots. This is not defined in the 623# makefile but the argument can be passed to make if needed. 624# 625 626MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 627export MODLIB 628 629# 630# INSTALL_MOD_STRIP, if defined, will cause modules to be 631# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 632# the default option --strip-debug will be used. Otherwise, 633# INSTALL_MOD_STRIP will used as the options to the strip command. 634 635ifdef INSTALL_MOD_STRIP 636ifeq ($(INSTALL_MOD_STRIP),1) 637mod_strip_cmd = $(STRIP) --strip-debug 638else 639mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 640endif # INSTALL_MOD_STRIP=1 641else 642mod_strip_cmd = true 643endif # INSTALL_MOD_STRIP 644export mod_strip_cmd 645 646 647ifeq ($(KBUILD_EXTMOD),) 648core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 649 650vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 651 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 652 $(net-y) $(net-m) $(libs-y) $(libs-m))) 653 654vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 655 $(init-n) $(init-) \ 656 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 657 $(net-n) $(net-) $(libs-n) $(libs-)))) 658 659init-y := $(patsubst %/, %/built-in.o, $(init-y)) 660core-y := $(patsubst %/, %/built-in.o, $(core-y)) 661drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 662net-y := $(patsubst %/, %/built-in.o, $(net-y)) 663libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 664libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 665libs-y := $(libs-y1) $(libs-y2) 666 667# Build vmlinux 668# --------------------------------------------------------------------------- 669# vmlinux is built from the objects selected by $(vmlinux-init) and 670# $(vmlinux-main). Most are built-in.o files from top-level directories 671# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 672# Ordering when linking is important, and $(vmlinux-init) must be first. 673# 674# vmlinux 675# ^ 676# | 677# +-< $(vmlinux-init) 678# | +--< init/version.o + more 679# | 680# +--< $(vmlinux-main) 681# | +--< driver/built-in.o mm/built-in.o + more 682# | 683# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 684# 685# vmlinux version (uname -v) cannot be updated during normal 686# descending-into-subdirs phase since we do not yet know if we need to 687# update vmlinux. 688# Therefore this step is delayed until just before final link of vmlinux - 689# except in the kallsyms case where it is done just before adding the 690# symbols to the kernel. 691# 692# System.map is generated to document addresses of all kernel symbols 693 694vmlinux-init := $(head-y) $(init-y) 695vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 696vmlinux-all := $(vmlinux-init) $(vmlinux-main) 697vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 698export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 699 700# Rule to link vmlinux - also used during CONFIG_KALLSYMS 701# May be overridden by arch/$(ARCH)/Makefile 702quiet_cmd_vmlinux__ ?= LD $@ 703 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 704 -T $(vmlinux-lds) $(vmlinux-init) \ 705 --start-group $(vmlinux-main) --end-group \ 706 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 707 708# Generate new vmlinux version 709quiet_cmd_vmlinux_version = GEN .version 710 cmd_vmlinux_version = set -e; \ 711 if [ ! -r .version ]; then \ 712 rm -f .version; \ 713 echo 1 >.version; \ 714 else \ 715 mv .version .old_version; \ 716 expr 0$$(cat .old_version) + 1 >.version; \ 717 fi; \ 718 $(MAKE) $(build)=init 719 720# Generate System.map 721quiet_cmd_sysmap = SYSMAP 722 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 723 724# Link of vmlinux 725# If CONFIG_KALLSYMS is set .version is already updated 726# Generate System.map and verify that the content is consistent 727# Use + in front of the vmlinux_version rule to silent warning with make -j2 728# First command is ':' to allow us to use + in front of the rule 729define rule_vmlinux__ 730 : 731 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 732 733 $(call cmd,vmlinux__) 734 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 735 736 $(Q)$(if $($(quiet)cmd_sysmap), \ 737 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 738 $(cmd_sysmap) $@ System.map; \ 739 if [ $$? -ne 0 ]; then \ 740 rm -f $@; \ 741 /bin/false; \ 742 fi; 743 $(verify_kallsyms) 744endef 745 746 747ifdef CONFIG_KALLSYMS 748# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 749# It's a three stage process: 750# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 751# empty 752# Running kallsyms on that gives us .tmp_kallsyms1.o with 753# the right size - vmlinux version (uname -v) is updated during this step 754# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 755# but due to the added section, some addresses have shifted. 756# From here, we generate a correct .tmp_kallsyms2.o 757# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 758# o Verify that the System.map from vmlinux matches the map from 759# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 760# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 761# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 762# temporary bypass to allow the kernel to be built while the 763# maintainers work out what went wrong with kallsyms. 764 765ifdef CONFIG_KALLSYMS_EXTRA_PASS 766last_kallsyms := 3 767else 768last_kallsyms := 2 769endif 770 771kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 772 773define verify_kallsyms 774 $(Q)$(if $($(quiet)cmd_sysmap), \ 775 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 776 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 777 $(Q)cmp -s System.map .tmp_System.map || \ 778 (echo Inconsistent kallsyms data; \ 779 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 780 rm .tmp_kallsyms* ; /bin/false ) 781endef 782 783# Update vmlinux version before link 784# Use + in front of this rule to silent warning about make -j1 785# First command is ':' to allow us to use + in front of this rule 786cmd_ksym_ld = $(cmd_vmlinux__) 787define rule_ksym_ld 788 : 789 +$(call cmd,vmlinux_version) 790 $(call cmd,vmlinux__) 791 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 792endef 793 794# Generate .S file with all kernel symbols 795quiet_cmd_kallsyms = KSYM $@ 796 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 797 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 798 799.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 800 $(call if_changed_dep,as_o_S) 801 802.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 803 $(call cmd,kallsyms) 804 805# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 806.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 807 $(call if_changed_rule,ksym_ld) 808 809.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 810 $(call if_changed,vmlinux__) 811 812.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 813 $(call if_changed,vmlinux__) 814 815# Needs to visit scripts/ before $(KALLSYMS) can be used. 816$(KALLSYMS): scripts ; 817 818# Generate some data for debugging strange kallsyms problems 819debug_kallsyms: .tmp_map$(last_kallsyms) 820 821.tmp_map%: .tmp_vmlinux% FORCE 822 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 823 824.tmp_map3: .tmp_map2 825 826.tmp_map2: .tmp_map1 827 828endif # ifdef CONFIG_KALLSYMS 829 830# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 831# relevant sections renamed as per the linker script. 832quiet_cmd_vmlinux-modpost = LD $@ 833 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 834 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 835 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 836define rule_vmlinux-modpost 837 : 838 +$(call cmd,vmlinux-modpost) 839 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 840 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 841endef 842 843# vmlinux image - including updated kernel symbols 844vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 845ifdef CONFIG_HEADERS_CHECK 846 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 847endif 848ifdef CONFIG_SAMPLES 849 $(Q)$(MAKE) $(build)=samples 850endif 851ifdef CONFIG_BUILD_DOCSRC 852 $(Q)$(MAKE) $(build)=Documentation 853endif 854 $(call vmlinux-modpost) 855 $(call if_changed_rule,vmlinux__) 856 $(Q)rm -f .old_version 857 858# build vmlinux.o first to catch section mismatch errors early 859ifdef CONFIG_KALLSYMS 860.tmp_vmlinux1: vmlinux.o 861endif 862 863modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 864vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 865 $(call if_changed_rule,vmlinux-modpost) 866 867# The actual objects are generated when descending, 868# make sure no implicit rule kicks in 869$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 870 871# Handle descending into subdirectories listed in $(vmlinux-dirs) 872# Preset locale variables to speed up the build process. Limit locale 873# tweaks to this spot to avoid wrong language settings when running 874# make menuconfig etc. 875# Error messages still appears in the original language 876 877PHONY += $(vmlinux-dirs) 878$(vmlinux-dirs): prepare scripts 879 $(Q)$(MAKE) $(build)=$@ 880 881# Build the kernel release string 882# 883# The KERNELRELEASE value built here is stored in the file 884# include/config/kernel.release, and is used when executing several 885# make targets, such as "make install" or "make modules_install." 886# 887# The eventual kernel release string consists of the following fields, 888# shown in a hierarchical format to show how smaller parts are concatenated 889# to form the larger and final value, with values coming from places like 890# the Makefile, kernel config options, make command line options and/or 891# SCM tag information. 892# 893# $(KERNELVERSION) 894# $(VERSION) eg, 2 895# $(PATCHLEVEL) eg, 6 896# $(SUBLEVEL) eg, 18 897# $(EXTRAVERSION) eg, -rc6 898# $(localver-full) 899# $(localver) 900# localversion* (files without backups, containing '~') 901# $(CONFIG_LOCALVERSION) (from kernel config setting) 902# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 903# ./scripts/setlocalversion (SCM tag, if one exists) 904# $(LOCALVERSION) (from make command line if provided) 905# 906# Note how the final $(localver-auto) string is included *only* if the 907# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 908# moment, only git is supported but other SCMs can edit the script 909# scripts/setlocalversion and add the appropriate checks as needed. 910 911pattern = ".*/localversion[^~]*" 912string = $(shell cat /dev/null \ 913 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 914 915localver = $(subst $(space),, $(string) \ 916 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 917 918# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 919# and if the SCM is know a tag from the SCM is appended. 920# The appended tag is determined by the SCM used. 921# 922# .scmversion is used when generating rpm packages so we do not loose 923# the version information from the SCM when we do the build of the kernel 924# from the copied source 925ifdef CONFIG_LOCALVERSION_AUTO 926 927ifeq ($(wildcard .scmversion),) 928 _localver-auto = $(shell $(CONFIG_SHELL) \ 929 $(srctree)/scripts/setlocalversion $(srctree)) 930else 931 _localver-auto = $(shell cat .scmversion 2> /dev/null) 932endif 933 934 localver-auto = $(LOCALVERSION)$(_localver-auto) 935endif 936 937localver-full = $(localver)$(localver-auto) 938 939# Store (new) KERNELRELASE string in include/config/kernel.release 940kernelrelease = $(KERNELVERSION)$(localver-full) 941include/config/kernel.release: include/config/auto.conf FORCE 942 $(Q)rm -f $@ 943 $(Q)echo $(kernelrelease) > $@ 944 945 946# Things we need to do before we recursively start building the kernel 947# or the modules are listed in "prepare". 948# A multi level approach is used. prepareN is processed before prepareN-1. 949# archprepare is used in arch Makefiles and when processed asm symlink, 950# version.h and scripts_basic is processed / created. 951 952# Listed in dependency order 953PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 954 955# prepare3 is used to check if we are building in a separate output directory, 956# and if so do: 957# 1) Check that make has not been executed in the kernel src $(srctree) 958prepare3: include/config/kernel.release 959ifneq ($(KBUILD_SRC),) 960 @$(kecho) ' Using $(srctree) as source for kernel' 961 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 962 echo " $(srctree) is not clean, please run 'make mrproper'";\ 963 echo " in the '$(srctree)' directory.";\ 964 /bin/false; \ 965 fi; 966endif 967 968# prepare2 creates a makefile if using a separate output directory 969prepare2: prepare3 outputmakefile 970 971prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ 972 include/config/auto.conf 973 $(cmd_crmodverdir) 974 975archprepare: prepare1 scripts_basic 976 977prepare0: archprepare FORCE 978 $(Q)$(MAKE) $(build)=. 979 $(Q)$(MAKE) $(build)=. missing-syscalls 980 981# All the preparing.. 982prepare: prepare0 983 984# Generate some files 985# --------------------------------------------------------------------------- 986 987# KERNELRELEASE can change from a few different places, meaning version.h 988# needs to be updated, so this check is forced on all builds 989 990uts_len := 64 991define filechk_utsrelease.h 992 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 993 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 994 exit 1; \ 995 fi; \ 996 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 997endef 998 999define filechk_version.h 1000 (echo \#define LINUX_VERSION_CODE $(shell \ 1001 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1002 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1003endef 1004 1005include/linux/version.h: $(srctree)/Makefile FORCE 1006 $(call filechk,version.h) 1007 1008include/generated/utsrelease.h: include/config/kernel.release FORCE 1009 $(call filechk,utsrelease.h) 1010 1011PHONY += headerdep 1012headerdep: 1013 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 1014 1015# --------------------------------------------------------------------------- 1016 1017PHONY += depend dep 1018depend dep: 1019 @echo '*** Warning: make $@ is unnecessary now.' 1020 1021# --------------------------------------------------------------------------- 1022# Firmware install 1023INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1024export INSTALL_FW_PATH 1025 1026PHONY += firmware_install 1027firmware_install: FORCE 1028 @mkdir -p $(objtree)/firmware 1029 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1030 1031# --------------------------------------------------------------------------- 1032# Kernel headers 1033 1034#Default location for installed headers 1035export INSTALL_HDR_PATH = $(objtree)/usr 1036 1037hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1038 1039# If we do an all arch process set dst to asm-$(hdr-arch) 1040hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1041 1042PHONY += __headers 1043__headers: include/linux/version.h scripts_basic FORCE 1044 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1045 1046PHONY += headers_install_all 1047headers_install_all: 1048 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1049 1050PHONY += headers_install 1051headers_install: __headers 1052 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ 1053 $(error Headers not exportable for the $(SRCARCH) architecture)) 1054 $(Q)$(MAKE) $(hdr-inst)=include 1055 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) 1056 1057PHONY += headers_check_all 1058headers_check_all: headers_install_all 1059 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1060 1061PHONY += headers_check 1062headers_check: headers_install 1063 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1064 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 1065 1066# --------------------------------------------------------------------------- 1067# Modules 1068 1069ifdef CONFIG_MODULES 1070 1071# By default, build modules as well 1072 1073all: modules 1074 1075# Build modules 1076# 1077# A module can be listed more than once in obj-m resulting in 1078# duplicate lines in modules.order files. Those are removed 1079# using awk while concatenating to the final file. 1080 1081PHONY += modules 1082modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1083 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1084 @$(kecho) ' Building modules, stage 2.'; 1085 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1086 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1087 1088 1089# Target to prepare building external modules 1090PHONY += modules_prepare 1091modules_prepare: prepare scripts 1092 1093# Target to install modules 1094PHONY += modules_install 1095modules_install: _modinst_ _modinst_post 1096 1097PHONY += _modinst_ 1098_modinst_: 1099 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1100 echo "Warning: you may need to install module-init-tools"; \ 1101 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1102 sleep 1; \ 1103 fi 1104 @rm -rf $(MODLIB)/kernel 1105 @rm -f $(MODLIB)/source 1106 @mkdir -p $(MODLIB)/kernel 1107 @ln -s $(srctree) $(MODLIB)/source 1108 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1109 rm -f $(MODLIB)/build ; \ 1110 ln -s $(objtree) $(MODLIB)/build ; \ 1111 fi 1112 @cp -f $(objtree)/modules.order $(MODLIB)/ 1113 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1114 1115# This depmod is only for convenience to give the initial 1116# boot a modules.dep even before / is mounted read-write. However the 1117# boot script depmod is the master version. 1118PHONY += _modinst_post 1119_modinst_post: _modinst_ 1120 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1121 $(call cmd,depmod) 1122 1123else # CONFIG_MODULES 1124 1125# Modules not configured 1126# --------------------------------------------------------------------------- 1127 1128modules modules_install: FORCE 1129 @echo 1130 @echo "The present kernel configuration has modules disabled." 1131 @echo "Type 'make config' and enable loadable module support." 1132 @echo "Then build a kernel with module support enabled." 1133 @echo 1134 @exit 1 1135 1136endif # CONFIG_MODULES 1137 1138### 1139# Cleaning is done on three levels. 1140# make clean Delete most generated files 1141# Leave enough to build external modules 1142# make mrproper Delete the current configuration, and all generated files 1143# make distclean Remove editor backup files, patch leftover files and the like 1144 1145# Directories & files removed with 'make clean' 1146CLEAN_DIRS += $(MODVERDIR) 1147CLEAN_FILES += vmlinux System.map \ 1148 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1149 1150# Directories & files removed with 'make mrproper' 1151MRPROPER_DIRS += include/config usr/include include/generated 1152MRPROPER_FILES += .config .config.old .version .old_version \ 1153 include/linux/version.h \ 1154 Module.symvers Module.markers tags TAGS cscope* 1155 1156# clean - Delete most, but leave enough to build external modules 1157# 1158clean: rm-dirs := $(CLEAN_DIRS) 1159clean: rm-files := $(CLEAN_FILES) 1160clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1161 1162PHONY += $(clean-dirs) clean archclean 1163$(clean-dirs): 1164 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1165 1166clean: archclean $(clean-dirs) 1167 $(call cmd,rmdirs) 1168 $(call cmd,rmfiles) 1169 @find . $(RCS_FIND_IGNORE) \ 1170 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1171 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1172 -o -name '*.symtypes' -o -name 'modules.order' \ 1173 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \ 1174 -o -name '*.gcno' \) -type f -print | xargs rm -f 1175 1176# mrproper - Delete all generated files, including .config 1177# 1178mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1179mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1180mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1181 1182PHONY += $(mrproper-dirs) mrproper archmrproper 1183$(mrproper-dirs): 1184 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1185 1186mrproper: clean archmrproper $(mrproper-dirs) 1187 $(call cmd,rmdirs) 1188 $(call cmd,rmfiles) 1189 1190# distclean 1191# 1192PHONY += distclean 1193 1194distclean: mrproper 1195 @find $(srctree) $(RCS_FIND_IGNORE) \ 1196 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1197 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1198 -o -name '.*.rej' -o -size 0 \ 1199 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1200 -type f -print | xargs rm -f 1201 1202 1203# Packaging of the kernel to various formats 1204# --------------------------------------------------------------------------- 1205# rpm target kept for backward compatibility 1206package-dir := $(srctree)/scripts/package 1207 1208%pkg: include/config/kernel.release FORCE 1209 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1210rpm: include/config/kernel.release FORCE 1211 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1212 1213 1214# Brief documentation of the typical targets used 1215# --------------------------------------------------------------------------- 1216 1217boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1218boards := $(notdir $(boards)) 1219board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1220board-dirs := $(sort $(notdir $(board-dirs:/=))) 1221 1222help: 1223 @echo 'Cleaning targets:' 1224 @echo ' clean - Remove most generated files but keep the config and' 1225 @echo ' enough build support to build external modules' 1226 @echo ' mrproper - Remove all generated files + config + various backup files' 1227 @echo ' distclean - mrproper + remove editor backup and patch files' 1228 @echo '' 1229 @echo 'Configuration targets:' 1230 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1231 @echo '' 1232 @echo 'Other generic targets:' 1233 @echo ' all - Build all targets marked with [*]' 1234 @echo '* vmlinux - Build the bare kernel' 1235 @echo '* modules - Build all modules' 1236 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1237 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1238 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1239 @echo ' dir/ - Build all files in dir and below' 1240 @echo ' dir/file.[ois] - Build specified target only' 1241 @echo ' dir/file.ko - Build module including final link' 1242 @echo ' modules_prepare - Set up for building external modules' 1243 @echo ' tags/TAGS - Generate tags file for editors' 1244 @echo ' cscope - Generate cscope index' 1245 @echo ' kernelrelease - Output the release version string' 1246 @echo ' kernelversion - Output the version stored in Makefile' 1247 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1248 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1249 echo '' 1250 @echo 'Static analysers' 1251 @echo ' checkstack - Generate a list of stack hogs' 1252 @echo ' namespacecheck - Name space analysis on compiled kernel' 1253 @echo ' versioncheck - Sanity check on version.h usage' 1254 @echo ' includecheck - Check for duplicate included header files' 1255 @echo ' export_report - List the usages of all exported symbols' 1256 @echo ' headers_check - Sanity check on exported headers' 1257 @echo ' headerdep - Detect inclusion cycles in headers'; \ 1258 echo '' 1259 @echo 'Kernel packaging:' 1260 @$(MAKE) $(build)=$(package-dir) help 1261 @echo '' 1262 @echo 'Documentation targets:' 1263 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1264 @echo '' 1265 @echo 'Architecture specific targets ($(SRCARCH)):' 1266 @$(if $(archhelp),$(archhelp),\ 1267 echo ' No architecture specific help defined for $(SRCARCH)') 1268 @echo '' 1269 @$(if $(boards), \ 1270 $(foreach b, $(boards), \ 1271 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1272 echo '') 1273 @$(if $(board-dirs), \ 1274 $(foreach b, $(board-dirs), \ 1275 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1276 printf " %-16s - Show all of the above\\n" help-boards; \ 1277 echo '') 1278 1279 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1280 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1281 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1282 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1283 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1284 @echo '' 1285 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1286 @echo 'For further info see the ./README file' 1287 1288 1289help-board-dirs := $(addprefix help-,$(board-dirs)) 1290 1291help-boards: $(help-board-dirs) 1292 1293boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1294 1295$(help-board-dirs): help-%: 1296 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1297 @$(if $(boards-per-dir), \ 1298 $(foreach b, $(boards-per-dir), \ 1299 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1300 echo '') 1301 1302 1303# Documentation targets 1304# --------------------------------------------------------------------------- 1305%docs: scripts_basic FORCE 1306 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1307 1308else # KBUILD_EXTMOD 1309 1310### 1311# External module support. 1312# When building external modules the kernel used as basis is considered 1313# read-only, and no consistency checks are made and the make 1314# system is not used on the basis kernel. If updates are required 1315# in the basis kernel ordinary make commands (without M=...) must 1316# be used. 1317# 1318# The following are the only valid targets when building external 1319# modules. 1320# make M=dir clean Delete all automatically generated files 1321# make M=dir modules Make all modules in specified dir 1322# make M=dir Same as 'make M=dir modules' 1323# make M=dir modules_install 1324# Install the modules built in the module directory 1325# Assumes install directory is already created 1326 1327# We are always building modules 1328KBUILD_MODULES := 1 1329PHONY += crmodverdir 1330crmodverdir: 1331 $(cmd_crmodverdir) 1332 1333PHONY += $(objtree)/Module.symvers 1334$(objtree)/Module.symvers: 1335 @test -e $(objtree)/Module.symvers || ( \ 1336 echo; \ 1337 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1338 echo " is missing; modules will have no dependencies and modversions."; \ 1339 echo ) 1340 1341module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1342PHONY += $(module-dirs) modules 1343$(module-dirs): crmodverdir $(objtree)/Module.symvers 1344 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1345 1346modules: $(module-dirs) 1347 @$(kecho) ' Building modules, stage 2.'; 1348 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1349 1350PHONY += modules_install 1351modules_install: _emodinst_ _emodinst_post 1352 1353install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1354PHONY += _emodinst_ 1355_emodinst_: 1356 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1357 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1358 1359PHONY += _emodinst_post 1360_emodinst_post: _emodinst_ 1361 $(call cmd,depmod) 1362 1363clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1364 1365PHONY += $(clean-dirs) clean 1366$(clean-dirs): 1367 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1368 1369clean: rm-dirs := $(MODVERDIR) 1370clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ 1371 $(KBUILD_EXTMOD)/Module.markers \ 1372 $(KBUILD_EXTMOD)/modules.order 1373clean: $(clean-dirs) 1374 $(call cmd,rmdirs) 1375 $(call cmd,rmfiles) 1376 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1377 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1378 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1379 -o -name '*.gcno' \) -type f -print | xargs rm -f 1380 1381help: 1382 @echo ' Building external modules.' 1383 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1384 @echo '' 1385 @echo ' modules - default target, build the module(s)' 1386 @echo ' modules_install - install the module' 1387 @echo ' clean - remove generated files in module directory only' 1388 @echo '' 1389 1390# Dummies... 1391PHONY += prepare scripts 1392prepare: ; 1393scripts: ; 1394endif # KBUILD_EXTMOD 1395 1396# Generate tags for editors 1397# --------------------------------------------------------------------------- 1398quiet_cmd_tags = GEN $@ 1399 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1400 1401tags TAGS cscope: FORCE 1402 $(call cmd,tags) 1403 1404# Scripts to check various things for consistency 1405# --------------------------------------------------------------------------- 1406 1407includecheck: 1408 find * $(RCS_FIND_IGNORE) \ 1409 -name '*.[hcS]' -type f -print | sort \ 1410 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1411 1412versioncheck: 1413 find * $(RCS_FIND_IGNORE) \ 1414 -name '*.[hcS]' -type f -print | sort \ 1415 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1416 1417namespacecheck: 1418 $(PERL) $(srctree)/scripts/namespace.pl 1419 1420export_report: 1421 $(PERL) $(srctree)/scripts/export_report.pl 1422 1423endif #ifeq ($(config-targets),1) 1424endif #ifeq ($(mixed-targets),1) 1425 1426PHONY += checkstack kernelrelease kernelversion 1427 1428# UML needs a little special treatment here. It wants to use the host 1429# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1430# else wants $(ARCH), including people doing cross-builds, which means 1431# that $(SUBARCH) doesn't work here. 1432ifeq ($(ARCH), um) 1433CHECKSTACK_ARCH := $(SUBARCH) 1434else 1435CHECKSTACK_ARCH := $(ARCH) 1436endif 1437checkstack: 1438 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1439 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1440 1441kernelrelease: 1442 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1443 $(error kernelrelease not valid - run 'make prepare' to update it)) 1444kernelversion: 1445 @echo $(KERNELVERSION) 1446 1447# Single targets 1448# --------------------------------------------------------------------------- 1449# Single targets are compatible with: 1450# - build with mixed source and output 1451# - build with separate output dir 'make O=...' 1452# - external modules 1453# 1454# target-dir => where to store outputfile 1455# build-dir => directory in kernel source tree to use 1456 1457ifeq ($(KBUILD_EXTMOD),) 1458 build-dir = $(patsubst %/,%,$(dir $@)) 1459 target-dir = $(dir $@) 1460else 1461 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1462 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1463 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1464endif 1465 1466%.s: %.c prepare scripts FORCE 1467 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1468%.i: %.c prepare scripts FORCE 1469 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1470%.o: %.c prepare scripts FORCE 1471 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1472%.lst: %.c prepare scripts FORCE 1473 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1474%.s: %.S prepare scripts FORCE 1475 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1476%.o: %.S prepare scripts FORCE 1477 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1478%.symtypes: %.c prepare scripts FORCE 1479 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1480 1481# Modules 1482/: prepare scripts FORCE 1483 $(cmd_crmodverdir) 1484 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1485 $(build)=$(build-dir) 1486%/: prepare scripts FORCE 1487 $(cmd_crmodverdir) 1488 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1489 $(build)=$(build-dir) 1490%.ko: prepare scripts FORCE 1491 $(cmd_crmodverdir) 1492 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1493 $(build)=$(build-dir) $(@:.ko=.o) 1494 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1495 1496# FIXME Should go into a make.lib or something 1497# =========================================================================== 1498 1499quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1500 cmd_rmdirs = rm -rf $(rm-dirs) 1501 1502quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1503 cmd_rmfiles = rm -f $(rm-files) 1504 1505# Run depmod only if we have System.map and depmod is executable 1506quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1507 cmd_depmod = \ 1508 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1509 $(DEPMOD) -ae -F System.map \ 1510 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1511 $(KERNELRELEASE); \ 1512 fi 1513 1514# Create temporary dir for module support files 1515# clean it up only when building all modules 1516cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1517 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1518 1519a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1520 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1521 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1522 1523quiet_cmd_as_o_S = AS $@ 1524cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1525 1526# read all saved command lines 1527 1528targets := $(wildcard $(sort $(targets))) 1529cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1530 1531ifneq ($(cmd_files),) 1532 $(cmd_files): ; # Do not try to update included dependency files 1533 include $(cmd_files) 1534endif 1535 1536# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1537# Usage: 1538# $(Q)$(MAKE) $(clean)=dir 1539clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1540 1541endif # skip-makefile 1542 1543PHONY += FORCE 1544FORCE: 1545 1546# Declare the contents of the .PHONY variable as phony. We keep that 1547# information in a variable so we can use it in if_changed and friends. 1548.PHONY: $(PHONY) 1549