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