1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 25 4EXTRAVERSION = 5NAME = Funky Weasel is Jiggy wit it 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 38ifdef V 39 ifeq ("$(origin V)", "command line") 40 KBUILD_VERBOSE = $(V) 41 endif 42endif 43ifndef KBUILD_VERBOSE 44 KBUILD_VERBOSE = 0 45endif 46 47# Call a source code checker (by default, "sparse") as part of the 48# C compilation. 49# 50# Use 'make C=1' to enable checking of only re-compiled files. 51# Use 'make C=2' to enable checking of *all* source files, regardless 52# of whether they are re-compiled or not. 53# 54# See the file "Documentation/sparse.txt" for more details, including 55# where to get the "sparse" utility. 56 57ifdef C 58 ifeq ("$(origin C)", "command line") 59 KBUILD_CHECKSRC = $(C) 60 endif 61endif 62ifndef KBUILD_CHECKSRC 63 KBUILD_CHECKSRC = 0 64endif 65 66# Use make M=dir to specify directory of external module to build 67# Old syntax make ... SUBDIRS=$PWD is still supported 68# Setting the environment variable KBUILD_EXTMOD take precedence 69ifdef SUBDIRS 70 KBUILD_EXTMOD ?= $(SUBDIRS) 71endif 72ifdef M 73 ifeq ("$(origin M)", "command line") 74 KBUILD_EXTMOD := $(M) 75 endif 76endif 77 78 79# kbuild supports saving output files in a separate directory. 80# To locate output files in a separate directory two syntaxes are supported. 81# In both cases the working directory must be the root of the kernel src. 82# 1) O= 83# Use "make O=dir/to/store/output/files/" 84# 85# 2) Set KBUILD_OUTPUT 86# Set the environment variable KBUILD_OUTPUT to point to the directory 87# where the output files shall be placed. 88# export KBUILD_OUTPUT=dir/to/store/output/files/ 89# make 90# 91# The O= assignment takes precedence over the KBUILD_OUTPUT environment 92# variable. 93 94 95# KBUILD_SRC is set on invocation of make in OBJ directory 96# KBUILD_SRC is not intended to be used by the regular user (for now) 97ifeq ($(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? 101ifdef O 102 ifeq ("$(origin O)", "command line") 103 KBUILD_OUTPUT := $(O) 104 endif 105endif 106 107# That's our default target when none is given on the command line 108PHONY := _all 109_all: 110 111# Cancel implicit rules on top Makefile 112$(CURDIR)/Makefile Makefile: ; 113 114ifneq ($(KBUILD_OUTPUT),) 115# Invoke a second make in the output directory, passing relevant variables 116# check that the output directory actually exists 117saved-output := $(KBUILD_OUTPUT) 118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 119$(if $(KBUILD_OUTPUT),, \ 120 $(error output directory "$(saved-output)" does not exist)) 121 122PHONY += $(MAKECMDGOALS) sub-make 123 124$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 125 $(Q)@: 126 127sub-make: FORCE 128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 129 KBUILD_SRC=$(CURDIR) \ 130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 131 $(filter-out _all sub-make,$(MAKECMDGOALS)) 132 133# Leave processing to above invocation of make 134skip-makefile := 1 135endif # ifneq ($(KBUILD_OUTPUT),) 136endif # ifeq ($(KBUILD_SRC),) 137 138# We process the rest of the Makefile if this is the final invocation of make 139ifeq ($(skip-makefile),) 140 141# If building an external module we do not care about the all: rule 142# but instead _all depend on modules 143PHONY += all 144ifeq ($(KBUILD_EXTMOD),) 145_all: all 146else 147_all: modules 148endif 149 150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 151TOPDIR := $(srctree) 152# FIXME - TOPDIR is obsolete, use srctree/objtree 153objtree := $(CURDIR) 154src := $(srctree) 155obj := $(objtree) 156 157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 158 159export srctree objtree VPATH TOPDIR 160 161 162# SUBARCH tells the usermode build what the underlying arch is. That is set 163# first, and if a usermode build is happening, the "ARCH=um" on the command 164# line overrides the setting of ARCH below. If a native build is happening, 165# then ARCH is assigned, getting whatever value it gets normally, and 166# SUBARCH is subsequently ignored. 167 168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 169 -e s/arm.*/arm/ -e s/sa110/arm/ \ 170 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 172 -e s/sh.*/sh/ ) 173 174# Cross compiling and selecting different set of gcc/bin-utils 175# --------------------------------------------------------------------------- 176# 177# When performing cross compilation for other architectures ARCH shall be set 178# to the target architecture. (See arch/* for the possibilities). 179# ARCH can be set during invocation of make: 180# make ARCH=ia64 181# Another way is to have ARCH set in the environment. 182# The default ARCH is the host where make is executed. 183 184# CROSS_COMPILE specify the prefix used for all executables used 185# during compilation. Only gcc and related bin-utils executables 186# are prefixed with $(CROSS_COMPILE). 187# CROSS_COMPILE can be set on the command line 188# make CROSS_COMPILE=ia64-linux- 189# Alternatively CROSS_COMPILE can be set in the environment. 190# Default value for CROSS_COMPILE is not to prefix executables 191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 192export KBUILD_BUILDHOST := $(SUBARCH) 193ARCH ?= $(SUBARCH) 194CROSS_COMPILE ?= 195 196# Architecture as present in compile.h 197UTS_MACHINE := $(ARCH) 198SRCARCH := $(ARCH) 199 200# Additional ARCH settings for x86 201ifeq ($(ARCH),i386) 202 SRCARCH := x86 203endif 204ifeq ($(ARCH),x86_64) 205 SRCARCH := x86 206endif 207 208KCONFIG_CONFIG ?= .config 209 210# SHELL used by kbuild 211CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 212 else if [ -x /bin/bash ]; then echo /bin/bash; \ 213 else echo sh; fi ; fi) 214 215HOSTCC = gcc 216HOSTCXX = g++ 217HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 218HOSTCXXFLAGS = -O2 219 220# Decide whether to build built-in, modular, or both. 221# Normally, just do built-in. 222 223KBUILD_MODULES := 224KBUILD_BUILTIN := 1 225 226# If we have only "make modules", don't compile built-in objects. 227# When we're building modules with modversions, we need to consider 228# the built-in objects during the descend as well, in order to 229# make sure the checksums are up to date before we record them. 230 231ifeq ($(MAKECMDGOALS),modules) 232 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 233endif 234 235# If we have "make <whatever> modules", compile modules 236# in addition to whatever we do anyway. 237# Just "make" or "make all" shall build modules as well 238 239ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 240 KBUILD_MODULES := 1 241endif 242 243ifeq ($(MAKECMDGOALS),) 244 KBUILD_MODULES := 1 245endif 246 247export KBUILD_MODULES KBUILD_BUILTIN 248export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 249 250# Beautify output 251# --------------------------------------------------------------------------- 252# 253# Normally, we echo the whole command before executing it. By making 254# that echo $($(quiet)$(cmd)), we now have the possibility to set 255# $(quiet) to choose other forms of output instead, e.g. 256# 257# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 258# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 259# 260# If $(quiet) is empty, the whole command will be printed. 261# If it is set to "quiet_", only the short version will be printed. 262# If it is set to "silent_", nothing will be printed at all, since 263# the variable $(silent_cmd_cc_o_c) doesn't exist. 264# 265# A simple variant is to prefix commands with $(Q) - that's useful 266# for commands that shall be hidden in non-verbose mode. 267# 268# $(Q)ln $@ :< 269# 270# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 271# If KBUILD_VERBOSE equals 1 then the above command is displayed. 272 273ifeq ($(KBUILD_VERBOSE),1) 274 quiet = 275 Q = 276else 277 quiet=quiet_ 278 Q = @ 279endif 280 281# If the user is running make -s (silent mode), suppress echoing of 282# commands 283 284ifneq ($(findstring s,$(MAKEFLAGS)),) 285 quiet=silent_ 286endif 287 288export quiet Q KBUILD_VERBOSE 289 290 291# Look for make include files relative to root of kernel src 292MAKEFLAGS += --include-dir=$(srctree) 293 294# We need some generic definitions (do not try to remake the file). 295$(srctree)/scripts/Kbuild.include: ; 296include $(srctree)/scripts/Kbuild.include 297 298# Make variables (CC, etc...) 299 300AS = $(CROSS_COMPILE)as 301LD = $(CROSS_COMPILE)ld 302CC = $(CROSS_COMPILE)gcc 303CPP = $(CC) -E 304AR = $(CROSS_COMPILE)ar 305NM = $(CROSS_COMPILE)nm 306STRIP = $(CROSS_COMPILE)strip 307OBJCOPY = $(CROSS_COMPILE)objcopy 308OBJDUMP = $(CROSS_COMPILE)objdump 309AWK = awk 310GENKSYMS = scripts/genksyms/genksyms 311DEPMOD = /sbin/depmod 312KALLSYMS = scripts/kallsyms 313PERL = perl 314CHECK = sparse 315 316CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 317MODFLAGS = -DMODULE 318CFLAGS_MODULE = $(MODFLAGS) 319AFLAGS_MODULE = $(MODFLAGS) 320LDFLAGS_MODULE = 321CFLAGS_KERNEL = 322AFLAGS_KERNEL = 323 324 325# Use LINUXINCLUDE when you must reference the include/ directory. 326# Needed to be compatible with the O= option 327LINUXINCLUDE := -Iinclude \ 328 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 329 -include include/linux/autoconf.h 330 331KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 332 333KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 334 -fno-strict-aliasing -fno-common \ 335 -Werror-implicit-function-declaration 336KBUILD_AFLAGS := -D__ASSEMBLY__ 337 338# Read KERNELRELEASE from include/config/kernel.release (if it exists) 339KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 340KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 341 342export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 343export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 344export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 345export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 346 347export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 348export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 349export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 350 351# When compiling out-of-tree modules, put MODVERDIR in the module 352# tree rather than in the kernel tree. The kernel tree might 353# even be read-only. 354export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 355 356# Files to ignore in find ... statements 357 358RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 359export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 360 361# =========================================================================== 362# Rules shared between *config targets and build targets 363 364# Basic helpers built in scripts/ 365PHONY += scripts_basic 366scripts_basic: 367 $(Q)$(MAKE) $(build)=scripts/basic 368 369# To avoid any implicit rule to kick in, define an empty command. 370scripts/basic/%: scripts_basic ; 371 372PHONY += outputmakefile 373# outputmakefile generates a Makefile in the output directory, if using a 374# separate output directory. This allows convenient use of make in the 375# output directory. 376outputmakefile: 377ifneq ($(KBUILD_SRC),) 378 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 379 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 380endif 381 382# To make sure we do not include .config for any of the *config targets 383# catch them early, and hand them over to scripts/kconfig/Makefile 384# It is allowed to specify more targets when calling make, including 385# mixing *config targets and build targets. 386# For example 'make oldconfig all'. 387# Detect when mixed targets is specified, and make a second invocation 388# of make so .config is not included in this case either (for *config). 389 390no-dot-config-targets := clean mrproper distclean \ 391 cscope TAGS tags help %docs check% \ 392 include/linux/version.h headers_% \ 393 kernelrelease kernelversion 394 395config-targets := 0 396mixed-targets := 0 397dot-config := 1 398 399ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 400 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 401 dot-config := 0 402 endif 403endif 404 405ifeq ($(KBUILD_EXTMOD),) 406 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 407 config-targets := 1 408 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 409 mixed-targets := 1 410 endif 411 endif 412endif 413 414ifeq ($(mixed-targets),1) 415# =========================================================================== 416# We're called with mixed targets (*config and build targets). 417# Handle them one by one. 418 419%:: FORCE 420 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 421 422else 423ifeq ($(config-targets),1) 424# =========================================================================== 425# *config targets only - make sure prerequisites are updated, and descend 426# in scripts/kconfig to make the *config target 427 428# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 429# KBUILD_DEFCONFIG may point out an alternative default configuration 430# used for 'make defconfig' 431include $(srctree)/arch/$(SRCARCH)/Makefile 432export KBUILD_DEFCONFIG 433 434config %config: scripts_basic outputmakefile FORCE 435 $(Q)mkdir -p include/linux include/config 436 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 437 438else 439# =========================================================================== 440# Build targets only - this includes vmlinux, arch specific targets, clean 441# targets and others. In general all targets except *config targets. 442 443ifeq ($(KBUILD_EXTMOD),) 444# Additional helpers built in scripts/ 445# Carefully list dependencies so we do not try to build scripts twice 446# in parallel 447PHONY += scripts 448scripts: scripts_basic include/config/auto.conf 449 $(Q)$(MAKE) $(build)=$(@) 450 451# Objects we will link into vmlinux / subdirs we need to visit 452init-y := init/ 453drivers-y := drivers/ sound/ 454net-y := net/ 455libs-y := lib/ 456core-y := usr/ 457endif # KBUILD_EXTMOD 458 459ifeq ($(dot-config),1) 460# Read in config 461-include include/config/auto.conf 462 463ifeq ($(KBUILD_EXTMOD),) 464# Read in dependencies to all Kconfig* files, make sure to run 465# oldconfig if changes are detected. 466-include include/config/auto.conf.cmd 467 468# To avoid any implicit rule to kick in, define an empty command 469$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 470 471# If .config is newer than include/config/auto.conf, someone tinkered 472# with it and forgot to run make oldconfig. 473# if auto.conf.cmd is missing then we are probably in a cleaned tree so 474# we execute the config step to be sure to catch updated Kconfig files 475include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 476 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 477else 478# external modules needs include/linux/autoconf.h and include/config/auto.conf 479# but do not care if they are up-to-date. Use auto.conf to trigger the test 480PHONY += include/config/auto.conf 481 482include/config/auto.conf: 483 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 484 echo; \ 485 echo " ERROR: Kernel configuration is invalid."; \ 486 echo " include/linux/autoconf.h or $@ are missing."; \ 487 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 488 echo; \ 489 /bin/false) 490 491endif # KBUILD_EXTMOD 492 493else 494# Dummy target needed, because used as prerequisite 495include/config/auto.conf: ; 496endif # $(dot-config) 497 498# The all: target is the default when no target is given on the 499# command line. 500# This allow a user to issue only 'make' to build a kernel including modules 501# Defaults vmlinux but it is usually overridden in the arch makefile 502all: vmlinux 503 504ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 505KBUILD_CFLAGS += -Os 506else 507KBUILD_CFLAGS += -O2 508endif 509 510# Force gcc to behave correct even for buggy distributions 511# Arch Makefiles may override this setting 512KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 513 514include $(srctree)/arch/$(SRCARCH)/Makefile 515 516ifdef CONFIG_FRAME_POINTER 517KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 518else 519KBUILD_CFLAGS += -fomit-frame-pointer 520endif 521 522ifdef CONFIG_DEBUG_INFO 523KBUILD_CFLAGS += -g 524KBUILD_AFLAGS += -gdwarf-2 525endif 526 527# We trigger additional mismatches with less inlining 528ifdef CONFIG_DEBUG_SECTION_MISMATCH 529KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 530endif 531 532# arch Makefile may override CC so keep this after arch Makefile is included 533NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 534CHECKFLAGS += $(NOSTDINC_FLAGS) 535 536# warn about C99 declaration after statement 537KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 538 539# disable pointer signed / unsigned warnings in gcc 4.0 540KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 541 542# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 543# But warn user when we do so 544warn-assign = \ 545$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 546 547ifneq ($(KCPPFLAGS),) 548 $(call warn-assign,CPPFLAGS) 549 KBUILD_CPPFLAGS += $(KCPPFLAGS) 550endif 551ifneq ($(KAFLAGS),) 552 $(call warn-assign,AFLAGS) 553 KBUILD_AFLAGS += $(KAFLAGS) 554endif 555ifneq ($(KCFLAGS),) 556 $(call warn-assign,CFLAGS) 557 KBUILD_CFLAGS += $(KCFLAGS) 558endif 559 560# Use --build-id when available. 561LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 562 $(call ld-option, -Wl$(comma)--build-id,)) 563LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 564LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 565 566# Default kernel image to build when no specific target is given. 567# KBUILD_IMAGE may be overruled on the command line or 568# set in the environment 569# Also any assignments in arch/$(ARCH)/Makefile take precedence over 570# this default value 571export KBUILD_IMAGE ?= vmlinux 572 573# 574# INSTALL_PATH specifies where to place the updated kernel and system map 575# images. Default is /boot, but you can set it to other values 576export INSTALL_PATH ?= /boot 577 578# 579# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 580# relocations required by build roots. This is not defined in the 581# makefile but the argument can be passed to make if needed. 582# 583 584MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 585export MODLIB 586 587# 588# INSTALL_MOD_STRIP, if defined, will cause modules to be 589# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 590# the default option --strip-debug will be used. Otherwise, 591# INSTALL_MOD_STRIP will used as the options to the strip command. 592 593ifdef INSTALL_MOD_STRIP 594ifeq ($(INSTALL_MOD_STRIP),1) 595mod_strip_cmd = $(STRIP) --strip-debug 596else 597mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 598endif # INSTALL_MOD_STRIP=1 599else 600mod_strip_cmd = true 601endif # INSTALL_MOD_STRIP 602export mod_strip_cmd 603 604 605ifeq ($(KBUILD_EXTMOD),) 606core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 607 608vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 609 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 610 $(net-y) $(net-m) $(libs-y) $(libs-m))) 611 612vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 613 $(init-n) $(init-) \ 614 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 615 $(net-n) $(net-) $(libs-n) $(libs-)))) 616 617init-y := $(patsubst %/, %/built-in.o, $(init-y)) 618core-y := $(patsubst %/, %/built-in.o, $(core-y)) 619drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 620net-y := $(patsubst %/, %/built-in.o, $(net-y)) 621libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 622libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 623libs-y := $(libs-y1) $(libs-y2) 624 625# Build vmlinux 626# --------------------------------------------------------------------------- 627# vmlinux is built from the objects selected by $(vmlinux-init) and 628# $(vmlinux-main). Most are built-in.o files from top-level directories 629# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 630# Ordering when linking is important, and $(vmlinux-init) must be first. 631# 632# vmlinux 633# ^ 634# | 635# +-< $(vmlinux-init) 636# | +--< init/version.o + more 637# | 638# +--< $(vmlinux-main) 639# | +--< driver/built-in.o mm/built-in.o + more 640# | 641# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 642# 643# vmlinux version (uname -v) cannot be updated during normal 644# descending-into-subdirs phase since we do not yet know if we need to 645# update vmlinux. 646# Therefore this step is delayed until just before final link of vmlinux - 647# except in the kallsyms case where it is done just before adding the 648# symbols to the kernel. 649# 650# System.map is generated to document addresses of all kernel symbols 651 652vmlinux-init := $(head-y) $(init-y) 653vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 654vmlinux-all := $(vmlinux-init) $(vmlinux-main) 655vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 656export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 657 658# Rule to link vmlinux - also used during CONFIG_KALLSYMS 659# May be overridden by arch/$(ARCH)/Makefile 660quiet_cmd_vmlinux__ ?= LD $@ 661 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 662 -T $(vmlinux-lds) $(vmlinux-init) \ 663 --start-group $(vmlinux-main) --end-group \ 664 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 665 666# Generate new vmlinux version 667quiet_cmd_vmlinux_version = GEN .version 668 cmd_vmlinux_version = set -e; \ 669 if [ ! -r .version ]; then \ 670 rm -f .version; \ 671 echo 1 >.version; \ 672 else \ 673 mv .version .old_version; \ 674 expr 0$$(cat .old_version) + 1 >.version; \ 675 fi; \ 676 $(MAKE) $(build)=init 677 678# Generate System.map 679quiet_cmd_sysmap = SYSMAP 680 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 681 682# Link of vmlinux 683# If CONFIG_KALLSYMS is set .version is already updated 684# Generate System.map and verify that the content is consistent 685# Use + in front of the vmlinux_version rule to silent warning with make -j2 686# First command is ':' to allow us to use + in front of the rule 687define rule_vmlinux__ 688 : 689 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 690 691 $(call cmd,vmlinux__) 692 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 693 694 $(Q)$(if $($(quiet)cmd_sysmap), \ 695 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 696 $(cmd_sysmap) $@ System.map; \ 697 if [ $$? -ne 0 ]; then \ 698 rm -f $@; \ 699 /bin/false; \ 700 fi; 701 $(verify_kallsyms) 702endef 703 704 705ifdef CONFIG_KALLSYMS 706# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 707# It's a three stage process: 708# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 709# empty 710# Running kallsyms on that gives us .tmp_kallsyms1.o with 711# the right size - vmlinux version (uname -v) is updated during this step 712# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 713# but due to the added section, some addresses have shifted. 714# From here, we generate a correct .tmp_kallsyms2.o 715# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 716# o Verify that the System.map from vmlinux matches the map from 717# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 718# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 719# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 720# temporary bypass to allow the kernel to be built while the 721# maintainers work out what went wrong with kallsyms. 722 723ifdef CONFIG_KALLSYMS_EXTRA_PASS 724last_kallsyms := 3 725else 726last_kallsyms := 2 727endif 728 729kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 730 731define verify_kallsyms 732 $(Q)$(if $($(quiet)cmd_sysmap), \ 733 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 734 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 735 $(Q)cmp -s System.map .tmp_System.map || \ 736 (echo Inconsistent kallsyms data; \ 737 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 738 rm .tmp_kallsyms* ; /bin/false ) 739endef 740 741# Update vmlinux version before link 742# Use + in front of this rule to silent warning about make -j1 743# First command is ':' to allow us to use + in front of this rule 744cmd_ksym_ld = $(cmd_vmlinux__) 745define rule_ksym_ld 746 : 747 +$(call cmd,vmlinux_version) 748 $(call cmd,vmlinux__) 749 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 750endef 751 752# Generate .S file with all kernel symbols 753quiet_cmd_kallsyms = KSYM $@ 754 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 755 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 756 757.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 758 $(call if_changed_dep,as_o_S) 759 760.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 761 $(call cmd,kallsyms) 762 763# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 764.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 765 $(call if_changed_rule,ksym_ld) 766 767.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 768 $(call if_changed,vmlinux__) 769 770.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 771 $(call if_changed,vmlinux__) 772 773# Needs to visit scripts/ before $(KALLSYMS) can be used. 774$(KALLSYMS): scripts ; 775 776# Generate some data for debugging strange kallsyms problems 777debug_kallsyms: .tmp_map$(last_kallsyms) 778 779.tmp_map%: .tmp_vmlinux% FORCE 780 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 781 782.tmp_map3: .tmp_map2 783 784.tmp_map2: .tmp_map1 785 786endif # ifdef CONFIG_KALLSYMS 787 788# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 789# relevant sections renamed as per the linker script. 790quiet_cmd_vmlinux-modpost = LD $@ 791 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 792 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 793 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^) 794define rule_vmlinux-modpost 795 : 796 +$(call cmd,vmlinux-modpost) 797 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 798 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 799endef 800 801# vmlinux image - including updated kernel symbols 802vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 803ifdef CONFIG_HEADERS_CHECK 804 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 805endif 806ifdef CONFIG_SAMPLES 807 $(Q)$(MAKE) $(build)=samples 808endif 809 $(call vmlinux-modpost) 810 $(call if_changed_rule,vmlinux__) 811 $(Q)rm -f .old_version 812 813# build vmlinux.o first to catch section mismatch errors early 814ifdef CONFIG_KALLSYMS 815.tmp_vmlinux1: vmlinux.o 816endif 817vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE 818 $(call if_changed_rule,vmlinux-modpost) 819 820# The actual objects are generated when descending, 821# make sure no implicit rule kicks in 822$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 823 824# Handle descending into subdirectories listed in $(vmlinux-dirs) 825# Preset locale variables to speed up the build process. Limit locale 826# tweaks to this spot to avoid wrong language settings when running 827# make menuconfig etc. 828# Error messages still appears in the original language 829 830PHONY += $(vmlinux-dirs) 831$(vmlinux-dirs): prepare scripts 832 $(Q)$(MAKE) $(build)=$@ 833 834# Build the kernel release string 835# 836# The KERNELRELEASE value built here is stored in the file 837# include/config/kernel.release, and is used when executing several 838# make targets, such as "make install" or "make modules_install." 839# 840# The eventual kernel release string consists of the following fields, 841# shown in a hierarchical format to show how smaller parts are concatenated 842# to form the larger and final value, with values coming from places like 843# the Makefile, kernel config options, make command line options and/or 844# SCM tag information. 845# 846# $(KERNELVERSION) 847# $(VERSION) eg, 2 848# $(PATCHLEVEL) eg, 6 849# $(SUBLEVEL) eg, 18 850# $(EXTRAVERSION) eg, -rc6 851# $(localver-full) 852# $(localver) 853# localversion* (files without backups, containing '~') 854# $(CONFIG_LOCALVERSION) (from kernel config setting) 855# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 856# ./scripts/setlocalversion (SCM tag, if one exists) 857# $(LOCALVERSION) (from make command line if provided) 858# 859# Note how the final $(localver-auto) string is included *only* if the 860# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 861# moment, only git is supported but other SCMs can edit the script 862# scripts/setlocalversion and add the appropriate checks as needed. 863 864pattern = ".*/localversion[^~]*" 865string = $(shell cat /dev/null \ 866 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 867 868localver = $(subst $(space),, $(string) \ 869 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 870 871# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 872# and if the SCM is know a tag from the SCM is appended. 873# The appended tag is determined by the SCM used. 874# 875# Currently, only git is supported. 876# Other SCMs can edit scripts/setlocalversion and add the appropriate 877# checks as needed. 878ifdef CONFIG_LOCALVERSION_AUTO 879 _localver-auto = $(shell $(CONFIG_SHELL) \ 880 $(srctree)/scripts/setlocalversion $(srctree)) 881 localver-auto = $(LOCALVERSION)$(_localver-auto) 882endif 883 884localver-full = $(localver)$(localver-auto) 885 886# Store (new) KERNELRELASE string in include/config/kernel.release 887kernelrelease = $(KERNELVERSION)$(localver-full) 888include/config/kernel.release: include/config/auto.conf FORCE 889 $(Q)rm -f $@ 890 $(Q)echo $(kernelrelease) > $@ 891 892 893# Things we need to do before we recursively start building the kernel 894# or the modules are listed in "prepare". 895# A multi level approach is used. prepareN is processed before prepareN-1. 896# archprepare is used in arch Makefiles and when processed asm symlink, 897# version.h and scripts_basic is processed / created. 898 899# Listed in dependency order 900PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 901 902# prepare3 is used to check if we are building in a separate output directory, 903# and if so do: 904# 1) Check that make has not been executed in the kernel src $(srctree) 905# 2) Create the include2 directory, used for the second asm symlink 906prepare3: include/config/kernel.release 907ifneq ($(KBUILD_SRC),) 908 @echo ' 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; 914 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 915 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm 916endif 917 918# prepare2 creates a makefile if using a separate output directory 919prepare2: prepare3 outputmakefile 920 921prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 922 include/asm include/config/auto.conf 923 $(cmd_crmodverdir) 924 925archprepare: prepare1 scripts_basic 926 927prepare0: archprepare FORCE 928 $(Q)$(MAKE) $(build)=. 929 $(Q)$(MAKE) $(build)=. missing-syscalls 930 931# All the preparing.. 932prepare: prepare0 933 934# Leave this as default for preprocessing vmlinux.lds.S, which is now 935# done in arch/$(ARCH)/kernel/Makefile 936 937export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 938 939# The asm symlink changes when $(ARCH) changes. 940# Detect this and ask user to run make mrproper 941 942include/asm: FORCE 943 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 944 if [ -L include/asm ]; then \ 945 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 946 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 947 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 948 exit 1; \ 949 fi; \ 950 else \ 951 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 952 if [ ! -d include ]; then \ 953 mkdir -p include; \ 954 fi; \ 955 ln -fsn asm-$(SRCARCH) $@; \ 956 fi 957 958# Generate some files 959# --------------------------------------------------------------------------- 960 961# KERNELRELEASE can change from a few different places, meaning version.h 962# needs to be updated, so this check is forced on all builds 963 964uts_len := 64 965define filechk_utsrelease.h 966 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 967 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 968 exit 1; \ 969 fi; \ 970 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 971endef 972 973define filechk_version.h 974 (echo \#define LINUX_VERSION_CODE $(shell \ 975 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 976 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 977endef 978 979include/linux/version.h: $(srctree)/Makefile FORCE 980 $(call filechk,version.h) 981 982include/linux/utsrelease.h: include/config/kernel.release FORCE 983 $(call filechk,utsrelease.h) 984 985# --------------------------------------------------------------------------- 986 987PHONY += depend dep 988depend dep: 989 @echo '*** Warning: make $@ is unnecessary now.' 990 991# --------------------------------------------------------------------------- 992# Kernel headers 993INSTALL_HDR_PATH=$(objtree)/usr 994export INSTALL_HDR_PATH 995 996HDRFILTER=generic i386 x86_64 997HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild))) 998 999PHONY += headers_install_all 1000headers_install_all: include/linux/version.h scripts_basic FORCE
1001 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1002 $(Q)for arch in $(HDRARCHES); do \ 1003 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\ 1004 done 1005 1006PHONY += headers_install 1007headers_install: include/linux/version.h scripts_basic FORCE 1008 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1009 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \ 1010 exit 1 ; fi 1011 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1012 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include 1013 1014PHONY += headers_check_all 1015headers_check_all: headers_install_all 1016 $(Q)for arch in $(HDRARCHES); do \ 1017 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\ 1018 done 1019 1020PHONY += headers_check 1021headers_check: headers_install 1022 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1 1023 1024# --------------------------------------------------------------------------- 1025# Modules 1026 1027ifdef CONFIG_MODULES 1028 1029# By default, build modules as well 1030 1031all: modules 1032 1033# Build modules 1034# 1035# A module can be listed more than once in obj-m resulting in 1036# duplicate lines in modules.order files. Those are removed 1037# using awk while concatenating to the final file. 1038 1039PHONY += modules 1040modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1041 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1042 @echo ' Building modules, stage 2.'; 1043 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1044 1045 1046# Target to prepare building external modules 1047PHONY += modules_prepare 1048modules_prepare: prepare scripts 1049 1050# Target to install modules 1051PHONY += modules_install 1052modules_install: _modinst_ _modinst_post 1053 1054PHONY += _modinst_ 1055_modinst_: 1056 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1057 echo "Warning: you may need to install module-init-tools"; \ 1058 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1059 sleep 1; \ 1060 fi 1061 @rm -rf $(MODLIB)/kernel 1062 @rm -f $(MODLIB)/source 1063 @mkdir -p $(MODLIB)/kernel 1064 @ln -s $(srctree) $(MODLIB)/source 1065 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1066 rm -f $(MODLIB)/build ; \ 1067 ln -s $(objtree) $(MODLIB)/build ; \ 1068 fi 1069 @cp -f $(objtree)/modules.order $(MODLIB)/ 1070 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1071 1072# This depmod is only for convenience to give the initial 1073# boot a modules.dep even before / is mounted read-write. However the 1074# boot script depmod is the master version. 1075PHONY += _modinst_post 1076_modinst_post: _modinst_ 1077 $(call cmd,depmod) 1078 1079else # CONFIG_MODULES 1080 1081# Modules not configured 1082# --------------------------------------------------------------------------- 1083 1084modules modules_install: FORCE 1085 @echo 1086 @echo "The present kernel configuration has modules disabled." 1087 @echo "Type 'make config' and enable loadable module support." 1088 @echo "Then build a kernel with module support enabled." 1089 @echo 1090 @exit 1 1091 1092endif # CONFIG_MODULES 1093 1094### 1095# Cleaning is done on three levels. 1096# make clean Delete most generated files 1097# Leave enough to build external modules 1098# make mrproper Delete the current configuration, and all generated files 1099# make distclean Remove editor backup files, patch leftover files and the like 1100 1101# Directories & files removed with 'make clean' 1102CLEAN_DIRS += $(MODVERDIR) 1103CLEAN_FILES += vmlinux System.map \ 1104 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1105 1106# Directories & files removed with 'make mrproper' 1107MRPROPER_DIRS += include/config include2 usr/include 1108MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1109 include/linux/autoconf.h include/linux/version.h \ 1110 include/linux/utsrelease.h \ 1111 Module.symvers tags TAGS cscope* 1112 1113# clean - Delete most, but leave enough to build external modules 1114# 1115clean: rm-dirs := $(CLEAN_DIRS) 1116clean: rm-files := $(CLEAN_FILES) 1117clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 1118 1119PHONY += $(clean-dirs) clean archclean 1120$(clean-dirs): 1121 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1122 1123clean: archclean $(clean-dirs) 1124 $(call cmd,rmdirs) 1125 $(call cmd,rmfiles) 1126 @find . $(RCS_FIND_IGNORE) \ 1127 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1128 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1129 -o -name '*.symtypes' -o -name 'modules.order' \) \ 1130 -type f -print | xargs rm -f 1131 1132# mrproper - Delete all generated files, including .config 1133# 1134mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1135mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1136mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1137 1138PHONY += $(mrproper-dirs) mrproper archmrproper 1139$(mrproper-dirs): 1140 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1141 1142mrproper: clean archmrproper $(mrproper-dirs) 1143 $(call cmd,rmdirs) 1144 $(call cmd,rmfiles) 1145 1146# distclean 1147# 1148PHONY += distclean 1149 1150distclean: mrproper 1151 @find $(srctree) $(RCS_FIND_IGNORE) \ 1152 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1153 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1154 -o -name '.*.rej' -o -size 0 \ 1155 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1156 -type f -print | xargs rm -f 1157 1158 1159# Packaging of the kernel to various formats 1160# --------------------------------------------------------------------------- 1161# rpm target kept for backward compatibility 1162package-dir := $(srctree)/scripts/package 1163 1164%pkg: include/config/kernel.release FORCE 1165 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1166rpm: include/config/kernel.release FORCE 1167 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1168 1169 1170# Brief documentation of the typical targets used 1171# --------------------------------------------------------------------------- 1172 1173boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1174boards := $(notdir $(boards)) 1175 1176help: 1177 @echo 'Cleaning targets:' 1178 @echo ' clean - Remove most generated files but keep the config and' 1179 @echo ' enough build support to build external modules' 1180 @echo ' mrproper - Remove all generated files + config + various backup files' 1181 @echo ' distclean - mrproper + remove editor backup and patch files' 1182 @echo '' 1183 @echo 'Configuration targets:' 1184 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1185 @echo '' 1186 @echo 'Other generic targets:' 1187 @echo ' all - Build all targets marked with [*]' 1188 @echo '* vmlinux - Build the bare kernel' 1189 @echo '* modules - Build all modules' 1190 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1191 @echo ' dir/ - Build all files in dir and below' 1192 @echo ' dir/file.[ois] - Build specified target only' 1193 @echo ' dir/file.ko - Build module including final link' 1194 @echo ' prepare - Set up for building external modules' 1195 @echo ' tags/TAGS - Generate tags file for editors' 1196 @echo ' cscope - Generate cscope index' 1197 @echo ' kernelrelease - Output the release version string' 1198 @echo ' kernelversion - Output the version stored in Makefile' 1199 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1200 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1201 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1202 fi 1203 @echo '' 1204 @echo 'Static analysers' 1205 @echo ' checkstack - Generate a list of stack hogs' 1206 @echo ' namespacecheck - Name space analysis on compiled kernel' 1207 @echo ' versioncheck - Sanity check on version.h usage' 1208 @echo ' includecheck - Check for duplicate included header files' 1209 @echo ' export_report - List the usages of all exported symbols' 1210 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1211 echo ' headers_check - Sanity check on exported headers'; \ 1212 fi 1213 @echo '' 1214 @echo 'Kernel packaging:' 1215 @$(MAKE) $(build)=$(package-dir) help 1216 @echo '' 1217 @echo 'Documentation targets:' 1218 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1219 @echo '' 1220 @echo 'Architecture specific targets ($(ARCH)):' 1221 @$(if $(archhelp),$(archhelp),\ 1222 echo ' No architecture specific help defined for $(ARCH)') 1223 @echo '' 1224 @$(if $(boards), \ 1225 $(foreach b, $(boards), \ 1226 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1227 echo '') 1228 1229 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1230 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1231 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1232 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1233 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1234 @echo '' 1235 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1236 @echo 'For further info see the ./README file' 1237 1238 1239# Documentation targets 1240# --------------------------------------------------------------------------- 1241%docs: scripts_basic FORCE 1242 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1243 1244else # KBUILD_EXTMOD 1245 1246### 1247# External module support. 1248# When building external modules the kernel used as basis is considered 1249# read-only, and no consistency checks are made and the make 1250# system is not used on the basis kernel. If updates are required 1251# in the basis kernel ordinary make commands (without M=...) must 1252# be used. 1253# 1254# The following are the only valid targets when building external 1255# modules. 1256# make M=dir clean Delete all automatically generated files 1257# make M=dir modules Make all modules in specified dir 1258# make M=dir Same as 'make M=dir modules' 1259# make M=dir modules_install 1260# Install the modules built in the module directory 1261# Assumes install directory is already created 1262 1263# We are always building modules 1264KBUILD_MODULES := 1 1265PHONY += crmodverdir 1266crmodverdir: 1267 $(cmd_crmodverdir) 1268 1269PHONY += $(objtree)/Module.symvers 1270$(objtree)/Module.symvers: 1271 @test -e $(objtree)/Module.symvers || ( \ 1272 echo; \ 1273 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1274 echo " is missing; modules will have no dependencies and modversions."; \ 1275 echo ) 1276 1277module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1278PHONY += $(module-dirs) modules 1279$(module-dirs): crmodverdir $(objtree)/Module.symvers 1280 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1281 1282modules: $(module-dirs) 1283 @echo ' Building modules, stage 2.'; 1284 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1285 1286PHONY += modules_install 1287modules_install: _emodinst_ _emodinst_post 1288 1289install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1290PHONY += _emodinst_ 1291_emodinst_: 1292 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1293 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1294 1295PHONY += _emodinst_post 1296_emodinst_post: _emodinst_ 1297 $(call cmd,depmod) 1298 1299clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1300 1301PHONY += $(clean-dirs) clean 1302$(clean-dirs): 1303 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1304 1305clean: rm-dirs := $(MODVERDIR) 1306clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1307clean: $(clean-dirs) 1308 $(call cmd,rmdirs) 1309 $(call cmd,rmfiles) 1310 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1311 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1312 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1313 -type f -print | xargs rm -f 1314 1315help: 1316 @echo ' Building external modules.' 1317 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1318 @echo '' 1319 @echo ' modules - default target, build the module(s)' 1320 @echo ' modules_install - install the module' 1321 @echo ' clean - remove generated files in module directory only' 1322 @echo '' 1323 1324# Dummies... 1325PHONY += prepare scripts 1326prepare: ; 1327scripts: ; 1328endif # KBUILD_EXTMOD 1329 1330# Generate tags for editors 1331# --------------------------------------------------------------------------- 1332 1333#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1334#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1335#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1336 1337ifeq ($(src),$(obj)) 1338__srctree = 1339else 1340__srctree = $(srctree)/ 1341endif 1342 1343ifeq ($(ALLSOURCE_ARCHS),) 1344ifeq ($(ARCH),um) 1345ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1346else 1347ALLINCLUDE_ARCHS := $(SRCARCH) 1348endif 1349else 1350#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1351ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1352endif 1353 1354ALLSOURCE_ARCHS := $(SRCARCH) 1355 1356define find-sources 1357 ( for arch in $(ALLSOURCE_ARCHS) ; do \ 1358 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \ 1359 -name $1 -print; \ 1360 done ; \ 1361 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1362 -name $1 -print; \ 1363 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1364 \( -name config -o -name 'asm-*' \) -prune \ 1365 -o -name $1 -print; \ 1366 for arch in $(ALLINCLUDE_ARCHS) ; do \ 1367 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \ 1368 -name $1 -print; \ 1369 done ; \ 1370 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1371 -name $1 -print; \ 1372 find $(__srctree) $(RCS_FIND_IGNORE) \ 1373 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \ 1374 -name $1 -print; \ 1375 ) 1376endef 1377 1378define all-sources 1379 $(call find-sources,'*.[chS]') 1380endef 1381define all-kconfigs 1382 $(call find-sources,'Kconfig*') 1383endef 1384define all-defconfigs 1385 $(call find-sources,'defconfig') 1386endef 1387 1388define xtags 1389 if $1 --version 2>&1 | grep -iq exuberant; then \ 1390 $(all-sources) | xargs $1 -a \ 1391 -I __initdata,__exitdata,__acquires,__releases \ 1392 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \ 1393 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1394 --extra=+f --c-kinds=+px \ 1395 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ 1396 $(all-kconfigs) | xargs $1 -a \ 1397 --langdef=kconfig \ 1398 --language-force=kconfig \ 1399 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \ 1400 $(all-defconfigs) | xargs -r $1 -a \ 1401 --langdef=dotconfig \ 1402 --language-force=dotconfig \ 1403 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ 1404 elif $1 --version 2>&1 | grep -iq emacs; then \ 1405 $(all-sources) | xargs $1 -a; \ 1406 $(all-kconfigs) | xargs $1 -a \ 1407 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ 1408 $(all-defconfigs) | xargs -r $1 -a \ 1409 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1410 else \ 1411 $(all-sources) | xargs $1 -a; \ 1412 fi 1413endef 1414 1415quiet_cmd_cscope-file = FILELST cscope.files 1416 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1417 1418quiet_cmd_cscope = MAKE cscope.out 1419 cmd_cscope = cscope -b 1420 1421cscope: FORCE 1422 $(call cmd,cscope-file) 1423 $(call cmd,cscope) 1424 1425quiet_cmd_TAGS = MAKE $@ 1426define cmd_TAGS 1427 rm -f $@; \ 1428 $(call xtags,etags) 1429endef 1430 1431TAGS: FORCE 1432 $(call cmd,TAGS) 1433 1434quiet_cmd_tags = MAKE $@ 1435define cmd_tags 1436 rm -f $@; \ 1437 $(call xtags,ctags) 1438endef 1439 1440tags: FORCE 1441 $(call cmd,tags) 1442 1443 1444# Scripts to check various things for consistency 1445# --------------------------------------------------------------------------- 1446 1447includecheck: 1448 find * $(RCS_FIND_IGNORE) \ 1449 -name '*.[hcS]' -type f -print | sort \ 1450 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1451 1452versioncheck: 1453 find * $(RCS_FIND_IGNORE) \ 1454 -name '*.[hcS]' -type f -print | sort \ 1455 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1456 1457namespacecheck: 1458 $(PERL) $(srctree)/scripts/namespace.pl 1459 1460export_report: 1461 $(PERL) $(srctree)/scripts/export_report.pl 1462 1463endif #ifeq ($(config-targets),1) 1464endif #ifeq ($(mixed-targets),1) 1465 1466PHONY += checkstack kernelrelease kernelversion 1467 1468# UML needs a little special treatment here. It wants to use the host 1469# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1470# else wants $(ARCH), including people doing cross-builds, which means 1471# that $(SUBARCH) doesn't work here. 1472ifeq ($(ARCH), um) 1473CHECKSTACK_ARCH := $(SUBARCH) 1474else 1475CHECKSTACK_ARCH := $(ARCH) 1476endif 1477checkstack: 1478 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1479 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1480 1481kernelrelease: 1482 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1483 $(error kernelrelease not valid - run 'make prepare' to update it)) 1484kernelversion: 1485 @echo $(KERNELVERSION) 1486 1487# Single targets 1488# --------------------------------------------------------------------------- 1489# Single targets are compatible with: 1490# - build with mixed source and output 1491# - build with separate output dir 'make O=...' 1492# - external modules 1493# 1494# target-dir => where to store outputfile 1495# build-dir => directory in kernel source tree to use 1496 1497ifeq ($(KBUILD_EXTMOD),) 1498 build-dir = $(patsubst %/,%,$(dir $@)) 1499 target-dir = $(dir $@) 1500else 1501 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1502 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1503 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1504endif 1505 1506%.s: %.c prepare scripts FORCE 1507 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1508%.i: %.c prepare scripts FORCE 1509 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1510%.o: %.c prepare scripts FORCE 1511 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1512%.lst: %.c prepare scripts FORCE 1513 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1514%.s: %.S prepare scripts FORCE 1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1516%.o: %.S prepare scripts FORCE 1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1518%.symtypes: %.c prepare scripts FORCE 1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1520 1521# Modules 1522/ %/: prepare scripts FORCE 1523 $(cmd_crmodverdir) 1524 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1525 $(build)=$(build-dir) 1526%.ko: prepare scripts FORCE 1527 $(cmd_crmodverdir) 1528 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1529 $(build)=$(build-dir) $(@:.ko=.o) 1530 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1531 1532# FIXME Should go into a make.lib or something 1533# =========================================================================== 1534 1535quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1536 cmd_rmdirs = rm -rf $(rm-dirs) 1537 1538quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1539 cmd_rmfiles = rm -f $(rm-files) 1540 1541# Run depmod only is we have System.map and depmod is executable 1542# and we build for the host arch 1543quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1544 cmd_depmod = \ 1545 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1546 $(DEPMOD) -ae -F System.map \ 1547 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ 1548 $(KERNELRELEASE); \ 1549 fi 1550 1551# Create temporary dir for module support files 1552# clean it up only when building all modules 1553cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1554 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1555 1556a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1557 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \ 1558 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1559 1560quiet_cmd_as_o_S = AS $@ 1561cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1562 1563# read all saved command lines 1564 1565targets := $(wildcard $(sort $(targets))) 1566cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1567 1568ifneq ($(cmd_files),) 1569 $(cmd_files): ; # Do not try to update included dependency files 1570 include $(cmd_files) 1571endif 1572 1573# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1574# Usage: 1575# $(Q)$(MAKE) $(clean)=dir 1576clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1577 1578endif # skip-makefile 1579 1580PHONY += FORCE 1581FORCE: 1582 1583# Declare the contents of the .PHONY variable as phony. We keep that 1584# information in a variable se we can use it in if_changed and friends. 1585.PHONY: $(PHONY) 1586