1FRED=42 2VERSION = 2 3PATCHLEVEL = 6 4SUBLEVEL = 26 5EXTRAVERSION = -rc8 6NAME = Rotary Wombat 7 8# *DOCUMENTATION* 9# To see a list of typical targets execute "make help" 10# More info can be located in ./README 11# Comments in this file are targeted only to the developer, do not 12# expect to learn how to build the kernel reading this file. 13 14# Do not: 15# o use make's built-in rules and variables 16# (this increases performance and avoids hard-to-debug behaviour); 17# o print "Entering directory ..."; 18MAKEFLAGS += -rR --no-print-directory 19 20# We are using a recursive build, so we need to do a little thinking 21# to get the ordering right. 22# 23# Most importantly: sub-Makefiles should only ever modify files in 24# their own directory. If in some directory we have a dependency on 25# a file in another dir (which doesn't happen often, but it's often 26# unavoidable when linking the built-in.o targets which finally 27# turn into vmlinux), we will call a sub make in that other dir, and 28# after that we are sure that everything which is in that other dir 29# is now up to date. 30# 31# The only cases where we need to modify files which have global 32# effects are thus separated out and done before the recursive 33# descending is started. They are now explicitly listed as the 34# prepare rule. 35 36# To put more focus on warnings, be less verbose as default 37# Use 'make V=1' to see the full commands 38 39ifdef V 40 ifeq ("$(origin V)", "command line") 41 KBUILD_VERBOSE = $(V) 42 endif 43endif 44ifndef KBUILD_VERBOSE 45 KBUILD_VERBOSE = 0 46endif 47 48# Call a source code checker (by default, "sparse") as part of the 49# C compilation. 50# 51# Use 'make C=1' to enable checking of only re-compiled files. 52# Use 'make C=2' to enable checking of *all* source files, regardless 53# of whether they are re-compiled or not. 54# 55# See the file "Documentation/sparse.txt" for more details, including 56# where to get the "sparse" utility. 57 58ifdef C 59 ifeq ("$(origin C)", "command line") 60 KBUILD_CHECKSRC = $(C) 61 endif 62endif 63ifndef KBUILD_CHECKSRC 64 KBUILD_CHECKSRC = 0 65endif 66 67# Use make M=dir to specify directory of external module to build 68# Old syntax make ... SUBDIRS=$PWD is still supported 69# Setting the environment variable KBUILD_EXTMOD take precedence 70ifdef SUBDIRS 71 KBUILD_EXTMOD ?= $(SUBDIRS) 72endif 73ifdef M 74 ifeq ("$(origin M)", "command line") 75 KBUILD_EXTMOD := $(M) 76 endif 77endif 78 79 80# kbuild supports saving output files in a separate directory. 81# To locate output files in a separate directory two syntaxes are supported. 82# In both cases the working directory must be the root of the kernel src. 83# 1) O= 84# Use "make O=dir/to/store/output/files/" 85# 86# 2) Set KBUILD_OUTPUT 87# Set the environment variable KBUILD_OUTPUT to point to the directory 88# where the output files shall be placed. 89# export KBUILD_OUTPUT=dir/to/store/output/files/ 90# make 91# 92# The O= assignment takes precedence over the KBUILD_OUTPUT environment 93# variable. 94 95 96# KBUILD_SRC is set on invocation of make in OBJ directory 97# KBUILD_SRC is not intended to be used by the regular user (for now) 98ifeq ($(KBUILD_SRC),) 99 100# OK, Make called in directory where kernel src resides 101# Do we want to locate output files in a separate directory? 102ifdef O 103 ifeq ("$(origin O)", "command line") 104 KBUILD_OUTPUT := $(O) 105 endif 106endif 107 108# That's our default target when none is given on the command line 109PHONY := _all 110_all: 111 112# Cancel implicit rules on top Makefile 113$(CURDIR)/Makefile Makefile: ; 114 115ifneq ($(KBUILD_OUTPUT),) 116# Invoke a second make in the output directory, passing relevant variables 117# check that the output directory actually exists 118saved-output := $(KBUILD_OUTPUT) 119KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 120$(if $(KBUILD_OUTPUT),, \ 121 $(error output directory "$(saved-output)" does not exist)) 122 123PHONY += $(MAKECMDGOALS) sub-make 124 125$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 126 $(Q)@: 127 128sub-make: FORCE 129 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 130 KBUILD_SRC=$(CURDIR) \ 131 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 132 $(filter-out _all sub-make,$(MAKECMDGOALS)) 133 134# Leave processing to above invocation of make 135skip-makefile := 1 136endif # ifneq ($(KBUILD_OUTPUT),) 137endif # ifeq ($(KBUILD_SRC),) 138 139# We process the rest of the Makefile if this is the final invocation of make 140ifeq ($(skip-makefile),) 141 142# If building an external module we do not care about the all: rule 143# but instead _all depend on modules 144PHONY += all 145ifeq ($(KBUILD_EXTMOD),) 146_all: all 147else 148_all: modules 149endif 150 151srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 152TOPDIR := $(srctree) 153# FIXME - TOPDIR is obsolete, use srctree/objtree 154objtree := $(CURDIR) 155src := $(srctree) 156obj := $(objtree) 157 158VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 159 160export srctree objtree VPATH TOPDIR 161 162 163# SUBARCH tells the usermode build what the underlying arch is. That is set 164# first, and if a usermode build is happening, the "ARCH=um" on the command 165# line overrides the setting of ARCH below. If a native build is happening, 166# then ARCH is assigned, getting whatever value it gets normally, and 167# SUBARCH is subsequently ignored. 168 169SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 170 -e s/arm.*/arm/ -e s/sa110/arm/ \ 171 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 172 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 173 -e s/sh.*/sh/ ) 174 175# Cross compiling and selecting different set of gcc/bin-utils 176# --------------------------------------------------------------------------- 177# 178# When performing cross compilation for other architectures ARCH shall be set 179# to the target architecture. (See arch/* for the possibilities). 180# ARCH can be set during invocation of make: 181# make ARCH=ia64 182# Another way is to have ARCH set in the environment. 183# The default ARCH is the host where make is executed. 184 185# CROSS_COMPILE specify the prefix used for all executables used 186# during compilation. Only gcc and related bin-utils executables 187# are prefixed with $(CROSS_COMPILE). 188# CROSS_COMPILE can be set on the command line 189# make CROSS_COMPILE=ia64-linux- 190# Alternatively CROSS_COMPILE can be set in the environment. 191# Default value for CROSS_COMPILE is not to prefix executables 192# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 193export KBUILD_BUILDHOST := $(SUBARCH) 194ARCH ?= $(SUBARCH) 195CROSS_COMPILE ?= 196 197# Architecture as present in compile.h 198UTS_MACHINE := $(ARCH) 199SRCARCH := $(ARCH) 200 201# Additional ARCH settings for x86 202ifeq ($(ARCH),i386) 203 SRCARCH := x86 204endif 205ifeq ($(ARCH),x86_64) 206 SRCARCH := x86 207endif 208 209KCONFIG_CONFIG ?= .config 210 211# SHELL used by kbuild 212CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 213 else if [ -x /bin/bash ]; then echo /bin/bash; \ 214 else echo sh; fi ; fi) 215 216HOSTCC = gcc 217HOSTCXX = g++ 218HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 219HOSTCXXFLAGS = -O2 220 221# Decide whether to build built-in, modular, or both. 222# Normally, just do built-in. 223 224KBUILD_MODULES := 225KBUILD_BUILTIN := 1 226 227# If we have only "make modules", don't compile built-in objects. 228# When we're building modules with modversions, we need to consider 229# the built-in objects during the descend as well, in order to 230# make sure the checksums are up to date before we record them. 231 232ifeq ($(MAKECMDGOALS),modules) 233 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 234endif 235 236# If we have "make <whatever> modules", compile modules 237# in addition to whatever we do anyway. 238# Just "make" or "make all" shall build modules as well 239 240ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 241 KBUILD_MODULES := 1 242endif 243 244ifeq ($(MAKECMDGOALS),) 245 KBUILD_MODULES := 1 246endif 247 248export KBUILD_MODULES KBUILD_BUILTIN 249export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 250 251# Beautify output 252# --------------------------------------------------------------------------- 253# 254# Normally, we echo the whole command before executing it. By making 255# that echo $($(quiet)$(cmd)), we now have the possibility to set 256# $(quiet) to choose other forms of output instead, e.g. 257# 258# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 259# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 260# 261# If $(quiet) is empty, the whole command will be printed. 262# If it is set to "quiet_", only the short version will be printed. 263# If it is set to "silent_", nothing will be printed at all, since 264# the variable $(silent_cmd_cc_o_c) doesn't exist. 265# 266# A simple variant is to prefix commands with $(Q) - that's useful 267# for commands that shall be hidden in non-verbose mode. 268# 269# $(Q)ln $@ :< 270# 271# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 272# If KBUILD_VERBOSE equals 1 then the above command is displayed. 273 274ifeq ($(KBUILD_VERBOSE),1) 275 quiet = 276 Q = 277else 278 quiet=quiet_ 279 Q = @ 280endif 281 282# If the user is running make -s (silent mode), suppress echoing of 283# commands 284 285ifneq ($(findstring s,$(MAKEFLAGS)),) 286 quiet=silent_ 287endif 288 289export quiet Q KBUILD_VERBOSE 290 291 292# Look for make include files relative to root of kernel src 293MAKEFLAGS += --include-dir=$(srctree) 294 295# We need some generic definitions (do not try to remake the file). 296$(srctree)/scripts/Kbuild.include: ; 297include $(srctree)/scripts/Kbuild.include 298 299# Make variables (CC, etc...) 300 301AS = $(CROSS_COMPILE)as 302LD = $(CROSS_COMPILE)ld 303CC = $(CROSS_COMPILE)gcc 304CPP = $(CC) -E 305AR = $(CROSS_COMPILE)ar 306NM = $(CROSS_COMPILE)nm 307STRIP = $(CROSS_COMPILE)strip 308OBJCOPY = $(CROSS_COMPILE)objcopy 309OBJDUMP = $(CROSS_COMPILE)objdump 310AWK = awk 311GENKSYMS = scripts/genksyms/genksyms 312DEPMOD = /sbin/depmod 313KALLSYMS = scripts/kallsyms 314PERL = perl 315CHECK = sparse 316 317CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 318MODFLAGS = -DMODULE 319CFLAGS_MODULE = $(MODFLAGS) 320AFLAGS_MODULE = $(MODFLAGS) 321LDFLAGS_MODULE = 322CFLAGS_KERNEL = 323AFLAGS_KERNEL = 324 325 326# Use LINUXINCLUDE when you must reference the include/ directory. 327# Needed to be compatible with the O= option 328LINUXINCLUDE := -Iinclude \ 329 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 330 -include include/linux/autoconf.h 331 332KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 333 334KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 335 -fno-strict-aliasing -fno-common \ 336 -Werror-implicit-function-declaration 337KBUILD_AFLAGS := -D__ASSEMBLY__ 338 339# Read KERNELRELEASE from include/config/kernel.release (if it exists) 340KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 341KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 342 343export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 344export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 345export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 346export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 347 348export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 349export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 350export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 351 352# When compiling out-of-tree modules, put MODVERDIR in the module 353# tree rather than in the kernel tree. The kernel tree might 354# even be read-only. 355export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 356 357# Files to ignore in find ... statements 358 359RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 360export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 361 362# =========================================================================== 363# Rules shared between *config targets and build targets 364 365# Basic helpers built in scripts/ 366PHONY += scripts_basic 367scripts_basic: 368 $(Q)$(MAKE) $(build)=scripts/basic 369 370# To avoid any implicit rule to kick in, define an empty command. 371scripts/basic/%: scripts_basic ; 372 373PHONY += outputmakefile 374# outputmakefile generates a Makefile in the output directory, if using a 375# separate output directory. This allows convenient use of make in the 376# output directory. 377outputmakefile: 378ifneq ($(KBUILD_SRC),) 379 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 380 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 381endif 382 383# To make sure we do not include .config for any of the *config targets 384# catch them early, and hand them over to scripts/kconfig/Makefile 385# It is allowed to specify more targets when calling make, including 386# mixing *config targets and build targets. 387# For example 'make oldconfig all'. 388# Detect when mixed targets is specified, and make a second invocation 389# of make so .config is not included in this case either (for *config). 390 391no-dot-config-targets := clean mrproper distclean \ 392 cscope TAGS tags help %docs check% \ 393 include/linux/version.h headers_% \ 394 kernelrelease kernelversion 395 396config-targets := 0 397mixed-targets := 0 398dot-config := 1 399 400ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 401 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 402 dot-config := 0 403 endif 404endif 405 406ifeq ($(KBUILD_EXTMOD),) 407 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 408 config-targets := 1 409 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 410 mixed-targets := 1 411 endif 412 endif 413endif 414 415ifeq ($(mixed-targets),1) 416# =========================================================================== 417# We're called with mixed targets (*config and build targets). 418# Handle them one by one. 419 420%:: FORCE 421 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 422 423else 424ifeq ($(config-targets),1) 425# =========================================================================== 426# *config targets only - make sure prerequisites are updated, and descend 427# in scripts/kconfig to make the *config target 428 429# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 430# KBUILD_DEFCONFIG may point out an alternative default configuration 431# used for 'make defconfig' 432include $(srctree)/arch/$(SRCARCH)/Makefile 433export KBUILD_DEFCONFIG 434 435config %config: scripts_basic outputmakefile FORCE 436 $(Q)mkdir -p include/linux include/config 437 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 438 439else 440# =========================================================================== 441# Build targets only - this includes vmlinux, arch specific targets, clean 442# targets and others. In general all targets except *config targets. 443 444ifeq ($(KBUILD_EXTMOD),) 445# Additional helpers built in scripts/ 446# Carefully list dependencies so we do not try to build scripts twice 447# in parallel 448PHONY += scripts 449scripts: scripts_basic include/config/auto.conf 450 $(Q)$(MAKE) $(build)=$(@) 451 452# Objects we will link into vmlinux / subdirs we need to visit 453init-y := init/ 454drivers-y := drivers/ sound/ 455net-y := net/ 456libs-y := lib/ 457core-y := usr/ 458endif # KBUILD_EXTMOD 459 460ifeq ($(dot-config),1) 461# Read in config 462-include include/config/auto.conf 463 464ifeq ($(KBUILD_EXTMOD),) 465# Read in dependencies to all Kconfig* files, make sure to run 466# oldconfig if changes are detected. 467-include include/config/auto.conf.cmd 468 469# To avoid any implicit rule to kick in, define an empty command 470$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 471 472# If .config is newer than include/config/auto.conf, someone tinkered 473# with it and forgot to run make oldconfig. 474# if auto.conf.cmd is missing then we are probably in a cleaned tree so 475# we execute the config step to be sure to catch updated Kconfig files 476include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 477 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 478else 479# external modules needs include/linux/autoconf.h and include/config/auto.conf 480# but do not care if they are up-to-date. Use auto.conf to trigger the test 481PHONY += include/config/auto.conf 482 483include/config/auto.conf: 484 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 485 echo; \ 486 echo " ERROR: Kernel configuration is invalid."; \ 487 echo " include/linux/autoconf.h or $@ are missing."; \ 488 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 489 echo; \ 490 /bin/false) 491 492endif # KBUILD_EXTMOD 493 494else 495# Dummy target needed, because used as prerequisite 496include/config/auto.conf: ; 497endif # $(dot-config) 498 499# The all: target is the default when no target is given on the 500# command line. 501# This allow a user to issue only 'make' to build a kernel including modules 502# Defaults vmlinux but it is usually overridden in the arch makefile 503all: vmlinux 504 505ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 506KBUILD_CFLAGS += -Os 507else 508KBUILD_CFLAGS += -O2 509endif 510 511ifneq (CONFIG_FRAME_WARN,0) 512KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 513endif 514 515# Force gcc to behave correct even for buggy distributions 516# Arch Makefiles may override this setting 517KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 518 519include $(srctree)/arch/$(SRCARCH)/Makefile 520 521ifdef CONFIG_FRAME_POINTER 522KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 523else 524KBUILD_CFLAGS += -fomit-frame-pointer 525endif 526 527ifdef CONFIG_DEBUG_INFO 528KBUILD_CFLAGS += -g 529KBUILD_AFLAGS += -gdwarf-2 530endif 531 532# We trigger additional mismatches with less inlining 533ifdef CONFIG_DEBUG_SECTION_MISMATCH 534KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 535endif 536 537# arch Makefile may override CC so keep this after arch Makefile is included 538NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 539CHECKFLAGS += $(NOSTDINC_FLAGS) 540 541# warn about C99 declaration after statement 542KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 543 544# disable pointer signed / unsigned warnings in gcc 4.0 545KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 546 547# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 548# But warn user when we do so 549warn-assign = \ 550$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 551 552ifneq ($(KCPPFLAGS),) 553 $(call warn-assign,CPPFLAGS) 554 KBUILD_CPPFLAGS += $(KCPPFLAGS) 555endif 556ifneq ($(KAFLAGS),) 557 $(call warn-assign,AFLAGS) 558 KBUILD_AFLAGS += $(KAFLAGS) 559endif 560ifneq ($(KCFLAGS),) 561 $(call warn-assign,CFLAGS) 562 KBUILD_CFLAGS += $(KCFLAGS) 563endif 564 565# Use --build-id when available. 566LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 567 $(call ld-option, -Wl$(comma)--build-id,)) 568LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 569LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 570 571# Default kernel image to build when no specific target is given. 572# KBUILD_IMAGE may be overruled on the command line or 573# set in the environment 574# Also any assignments in arch/$(ARCH)/Makefile take precedence over 575# this default value 576export KBUILD_IMAGE ?= vmlinux 577 578# 579# INSTALL_PATH specifies where to place the updated kernel and system map 580# images. Default is /boot, but you can set it to other values 581export INSTALL_PATH ?= /boot 582 583# 584# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 585# relocations required by build roots. This is not defined in the 586# makefile but the argument can be passed to make if needed. 587# 588 589MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 590export MODLIB 591 592# 593# INSTALL_MOD_STRIP, if defined, will cause modules to be 594# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 595# the default option --strip-debug will be used. Otherwise, 596# INSTALL_MOD_STRIP will used as the options to the strip command. 597 598ifdef INSTALL_MOD_STRIP 599ifeq ($(INSTALL_MOD_STRIP),1) 600mod_strip_cmd = $(STRIP) --strip-debug 601else 602mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 603endif # INSTALL_MOD_STRIP=1 604else 605mod_strip_cmd = true 606endif # INSTALL_MOD_STRIP 607export mod_strip_cmd 608 609 610ifeq ($(KBUILD_EXTMOD),) 611core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 612 613vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 614 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 615 $(net-y) $(net-m) $(libs-y) $(libs-m))) 616 617vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 618 $(init-n) $(init-) \ 619 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 620 $(net-n) $(net-) $(libs-n) $(libs-)))) 621 622init-y := $(patsubst %/, %/built-in.o, $(init-y)) 623core-y := $(patsubst %/, %/built-in.o, $(core-y)) 624drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 625net-y := $(patsubst %/, %/built-in.o, $(net-y)) 626libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 627libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 628libs-y := $(libs-y1) $(libs-y2) 629 630# Build vmlinux 631# --------------------------------------------------------------------------- 632# vmlinux is built from the objects selected by $(vmlinux-init) and 633# $(vmlinux-main). Most are built-in.o files from top-level directories 634# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 635# Ordering when linking is important, and $(vmlinux-init) must be first. 636# 637# vmlinux 638# ^ 639# | 640# +-< $(vmlinux-init) 641# | +--< init/version.o + more 642# | 643# +--< $(vmlinux-main) 644# | +--< driver/built-in.o mm/built-in.o + more 645# | 646# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 647# 648# vmlinux version (uname -v) cannot be updated during normal 649# descending-into-subdirs phase since we do not yet know if we need to 650# update vmlinux. 651# Therefore this step is delayed until just before final link of vmlinux - 652# except in the kallsyms case where it is done just before adding the 653# symbols to the kernel. 654# 655# System.map is generated to document addresses of all kernel symbols 656 657vmlinux-init := $(head-y) $(init-y) 658vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 659vmlinux-all := $(vmlinux-init) $(vmlinux-main) 660vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 661export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 662 663# Rule to link vmlinux - also used during CONFIG_KALLSYMS 664# May be overridden by arch/$(ARCH)/Makefile 665quiet_cmd_vmlinux__ ?= LD $@ 666 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 667 -T $(vmlinux-lds) $(vmlinux-init) \ 668 --start-group $(vmlinux-main) --end-group \ 669 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 670 671# Generate new vmlinux version 672quiet_cmd_vmlinux_version = GEN .version 673 cmd_vmlinux_version = set -e; \ 674 if [ ! -r .version ]; then \ 675 rm -f .version; \ 676 echo 1 >.version; \ 677 else \ 678 mv .version .old_version; \ 679 expr 0$$(cat .old_version) + 1 >.version; \ 680 fi; \ 681 $(MAKE) $(build)=init 682 683# Generate System.map 684quiet_cmd_sysmap = SYSMAP 685 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 686 687# Link of vmlinux 688# If CONFIG_KALLSYMS is set .version is already updated 689# Generate System.map and verify that the content is consistent 690# Use + in front of the vmlinux_version rule to silent warning with make -j2 691# First command is ':' to allow us to use + in front of the rule 692define rule_vmlinux__ 693 : 694 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 695 696 $(call cmd,vmlinux__) 697 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 698 699 $(Q)$(if $($(quiet)cmd_sysmap), \ 700 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 701 $(cmd_sysmap) $@ System.map; \ 702 if [ $$? -ne 0 ]; then \ 703 rm -f $@; \ 704 /bin/false; \ 705 fi; 706 $(verify_kallsyms) 707endef 708 709 710ifdef CONFIG_KALLSYMS 711# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 712# It's a three stage process: 713# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 714# empty 715# Running kallsyms on that gives us .tmp_kallsyms1.o with 716# the right size - vmlinux version (uname -v) is updated during this step 717# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 718# but due to the added section, some addresses have shifted. 719# From here, we generate a correct .tmp_kallsyms2.o 720# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 721# o Verify that the System.map from vmlinux matches the map from 722# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 723# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 724# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 725# temporary bypass to allow the kernel to be built while the 726# maintainers work out what went wrong with kallsyms. 727 728ifdef CONFIG_KALLSYMS_EXTRA_PASS 729last_kallsyms := 3 730else 731last_kallsyms := 2 732endif 733 734kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 735 736define verify_kallsyms 737 $(Q)$(if $($(quiet)cmd_sysmap), \ 738 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 739 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 740 $(Q)cmp -s System.map .tmp_System.map || \ 741 (echo Inconsistent kallsyms data; \ 742 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 743 rm .tmp_kallsyms* ; /bin/false ) 744endef 745 746# Update vmlinux version before link 747# Use + in front of this rule to silent warning about make -j1 748# First command is ':' to allow us to use + in front of this rule 749cmd_ksym_ld = $(cmd_vmlinux__) 750define rule_ksym_ld 751 : 752 +$(call cmd,vmlinux_version) 753 $(call cmd,vmlinux__) 754 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 755endef 756 757# Generate .S file with all kernel symbols 758quiet_cmd_kallsyms = KSYM $@ 759 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 760 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 761 762.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 763 $(call if_changed_dep,as_o_S) 764 765.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 766 $(call cmd,kallsyms) 767 768# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 769.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 770 $(call if_changed_rule,ksym_ld) 771 772.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 773 $(call if_changed,vmlinux__) 774 775.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 776 $(call if_changed,vmlinux__) 777 778# Needs to visit scripts/ before $(KALLSYMS) can be used. 779$(KALLSYMS): scripts ; 780 781# Generate some data for debugging strange kallsyms problems 782debug_kallsyms: .tmp_map$(last_kallsyms) 783 784.tmp_map%: .tmp_vmlinux% FORCE 785 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 786 787.tmp_map3: .tmp_map2 788 789.tmp_map2: .tmp_map1 790 791endif # ifdef CONFIG_KALLSYMS 792 793# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 794# relevant sections renamed as per the linker script. 795quiet_cmd_vmlinux-modpost = LD $@ 796 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 797 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 798 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 799define rule_vmlinux-modpost 800 : 801 +$(call cmd,vmlinux-modpost) 802 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 803 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 804endef 805 806# vmlinux image - including updated kernel symbols 807vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 808ifdef CONFIG_HEADERS_CHECK 809 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 810endif 811ifdef CONFIG_SAMPLES 812 $(Q)$(MAKE) $(build)=samples 813endif 814 $(call vmlinux-modpost) 815 $(call if_changed_rule,vmlinux__) 816 $(Q)rm -f .old_version 817 818# build vmlinux.o first to catch section mismatch errors early 819ifdef CONFIG_KALLSYMS 820.tmp_vmlinux1: vmlinux.o 821endif 822 823modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 824vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 825 $(call if_changed_rule,vmlinux-modpost) 826 827# The actual objects are generated when descending, 828# make sure no implicit rule kicks in 829$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 830 831# Handle descending into subdirectories listed in $(vmlinux-dirs) 832# Preset locale variables to speed up the build process. Limit locale 833# tweaks to this spot to avoid wrong language settings when running 834# make menuconfig etc. 835# Error messages still appears in the original language 836 837PHONY += $(vmlinux-dirs) 838$(vmlinux-dirs): prepare scripts 839 $(Q)$(MAKE) $(build)=$@ 840 841# Build the kernel release string 842# 843# The KERNELRELEASE value built here is stored in the file 844# include/config/kernel.release, and is used when executing several 845# make targets, such as "make install" or "make modules_install." 846# 847# The eventual kernel release string consists of the following fields, 848# shown in a hierarchical format to show how smaller parts are concatenated 849# to form the larger and final value, with values coming from places like 850# the Makefile, kernel config options, make command line options and/or 851# SCM tag information. 852# 853# $(KERNELVERSION) 854# $(VERSION) eg, 2 855# $(PATCHLEVEL) eg, 6 856# $(SUBLEVEL) eg, 18 857# $(EXTRAVERSION) eg, -rc6 858# $(localver-full) 859# $(localver) 860# localversion* (files without backups, containing '~') 861# $(CONFIG_LOCALVERSION) (from kernel config setting) 862# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 863# ./scripts/setlocalversion (SCM tag, if one exists) 864# $(LOCALVERSION) (from make command line if provided) 865# 866# Note how the final $(localver-auto) string is included *only* if the 867# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 868# moment, only git is supported but other SCMs can edit the script 869# scripts/setlocalversion and add the appropriate checks as needed. 870 871pattern = ".*/localversion[^~]*" 872string = $(shell cat /dev/null \ 873 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 874 875localver = $(subst $(space),, $(string) \ 876 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 877 878# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 879# and if the SCM is know a tag from the SCM is appended. 880# The appended tag is determined by the SCM used. 881# 882# Currently, only git is supported. 883# Other SCMs can edit scripts/setlocalversion and add the appropriate 884# checks as needed. 885ifdef CONFIG_LOCALVERSION_AUTO 886 _localver-auto = $(shell $(CONFIG_SHELL) \ 887 $(srctree)/scripts/setlocalversion $(srctree)) 888 localver-auto = $(LOCALVERSION)$(_localver-auto) 889endif 890 891localver-full = $(localver)$(localver-auto) 892 893# Store (new) KERNELRELASE string in include/config/kernel.release 894kernelrelease = $(KERNELVERSION)$(localver-full) 895include/config/kernel.release: include/config/auto.conf FORCE 896 $(Q)rm -f $@ 897 $(Q)echo $(kernelrelease) > $@ 898 899 900# Things we need to do before we recursively start building the kernel 901# or the modules are listed in "prepare". 902# A multi level approach is used. prepareN is processed before prepareN-1. 903# archprepare is used in arch Makefiles and when processed asm symlink, 904# version.h and scripts_basic is processed / created. 905 906# Listed in dependency order 907PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 908 909# prepare3 is used to check if we are building in a separate output directory, 910# and if so do: 911# 1) Check that make has not been executed in the kernel src $(srctree) 912# 2) Create the include2 directory, used for the second asm symlink 913prepare3: include/config/kernel.release 914ifneq ($(KBUILD_SRC),) 915 @echo ' Using $(srctree) as source for kernel' 916 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 917 echo " $(srctree) is not clean, please run 'make mrproper'";\ 918 echo " in the '$(srctree)' directory.";\ 919 /bin/false; \ 920 fi; 921 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 922 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm 923endif 924 925# prepare2 creates a makefile if using a separate output directory 926prepare2: prepare3 outputmakefile 927 928prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 929 include/asm include/config/auto.conf 930 $(cmd_crmodverdir) 931 932archprepare: prepare1 scripts_basic 933 934prepare0: archprepare FORCE 935 $(Q)$(MAKE) $(build)=. 936 $(Q)$(MAKE) $(build)=. missing-syscalls 937 938# All the preparing.. 939prepare: prepare0 940 941# Leave this as default for preprocessing vmlinux.lds.S, which is now 942# done in arch/$(ARCH)/kernel/Makefile 943 944export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 945 946# The asm symlink changes when $(ARCH) changes. 947# Detect this and ask user to run make mrproper 948 949include/asm: FORCE 950 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 951 if [ -L include/asm ]; then \ 952 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 953 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 954 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 955 exit 1; \ 956 fi; \ 957 else \ 958 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 959 if [ ! -d include ]; then \ 960 mkdir -p include; \ 961 fi; \ 962 ln -fsn asm-$(SRCARCH) $@; \ 963 fi 964 965# Generate some files 966# --------------------------------------------------------------------------- 967 968# KERNELRELEASE can change from a few different places, meaning version.h 969# needs to be updated, so this check is forced on all builds 970 971uts_len := 64 972define filechk_utsrelease.h 973 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 974 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 975 exit 1; \ 976 fi; \ 977 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 978endef 979 980define filechk_version.h 981 (echo \#define LINUX_VERSION_CODE $(shell \ 982 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 983 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 984endef 985 986include/linux/version.h: $(srctree)/Makefile FORCE 987 $(call filechk,version.h) 988 989include/linux/utsrelease.h: include/config/kernel.release FORCE 990 $(call filechk,utsrelease.h) 991 992# --------------------------------------------------------------------------- 993 994PHONY += depend dep 995depend dep: 996 @echo '*** Warning: make $@ is unnecessary now.' 997 998# --------------------------------------------------------------------------- 999# Kernel headers 1000INSTALL_HDR_PATH=$(objtree)/usr 1001export INSTALL_HDR_PATH 1002 1003HDRFILTER=generic i386 x86_64 1004HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild))) 1005 1006PHONY += headers_install_all 1007headers_install_all: include/linux/version.h scripts_basic FORCE 1008 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1009 $(Q)for arch in $(HDRARCHES); do \ 1010 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\ 1011 done 1012 1013PHONY += headers_install 1014headers_install: include/linux/version.h scripts_basic FORCE 1015 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1016 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \ 1017 exit 1 ; fi 1018 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1019 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include 1020 1021PHONY += headers_check_all 1022headers_check_all: headers_install_all 1023 $(Q)for arch in $(HDRARCHES); do \ 1024 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\ 1025 done 1026 1027PHONY += headers_check 1028headers_check: headers_install 1029 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1 1030 1031# --------------------------------------------------------------------------- 1032# Modules 1033 1034ifdef CONFIG_MODULES 1035 1036# By default, build modules as well 1037 1038all: modules 1039 1040# Build modules 1041# 1042# A module can be listed more than once in obj-m resulting in 1043# duplicate lines in modules.order files. Those are removed 1044# using awk while concatenating to the final file. 1045 1046PHONY += modules 1047modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1048 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1049 @echo ' Building modules, stage 2.'; 1050 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1051 1052 1053# Target to prepare building external modules 1054PHONY += modules_prepare 1055modules_prepare: prepare scripts 1056 1057# Target to install modules 1058PHONY += modules_install 1059modules_install: _modinst_ _modinst_post 1060 1061PHONY += _modinst_ 1062_modinst_: 1063 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1064 echo "Warning: you may need to install module-init-tools"; \ 1065 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1066 sleep 1; \ 1067 fi 1068 @rm -rf $(MODLIB)/kernel 1069 @rm -f $(MODLIB)/source 1070 @mkdir -p $(MODLIB)/kernel 1071 @ln -s $(srctree) $(MODLIB)/source 1072 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1073 rm -f $(MODLIB)/build ; \ 1074 ln -s $(objtree) $(MODLIB)/build ; \ 1075 fi 1076 @cp -f $(objtree)/modules.order $(MODLIB)/ 1077 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1078 1079# This depmod is only for convenience to give the initial 1080# boot a modules.dep even before / is mounted read-write. However the 1081# boot script depmod is the master version. 1082PHONY += _modinst_post 1083_modinst_post: _modinst_ 1084 $(call cmd,depmod) 1085 1086else # CONFIG_MODULES 1087 1088# Modules not configured 1089# --------------------------------------------------------------------------- 1090 1091modules modules_install: FORCE 1092 @echo 1093 @echo "The present kernel configuration has modules disabled." 1094 @echo "Type 'make config' and enable loadable module support." 1095 @echo "Then build a kernel with module support enabled." 1096 @echo 1097 @exit 1 1098 1099endif # CONFIG_MODULES 1100 1101### 1102# Cleaning is done on three levels. 1103# make clean Delete most generated files 1104# Leave enough to build external modules 1105# make mrproper Delete the current configuration, and all generated files 1106# make distclean Remove editor backup files, patch leftover files and the like 1107 1108# Directories & files removed with 'make clean' 1109CLEAN_DIRS += $(MODVERDIR) 1110CLEAN_FILES += vmlinux System.map \ 1111 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1112 1113# Directories & files removed with 'make mrproper' 1114MRPROPER_DIRS += include/config include2 usr/include 1115MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1116 include/linux/autoconf.h include/linux/version.h \ 1117 include/linux/utsrelease.h \ 1118 include/linux/bounds.h include/asm*/asm-offsets.h \ 1119 Module.symvers tags TAGS cscope* 1120 1121# clean - Delete most, but leave enough to build external modules 1122# 1123clean: rm-dirs := $(CLEAN_DIRS) 1124clean: rm-files := $(CLEAN_FILES) 1125clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 1126 1127PHONY += $(clean-dirs) clean archclean 1128$(clean-dirs): 1129 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1130 1131clean: archclean $(clean-dirs) 1132 $(call cmd,rmdirs) 1133 $(call cmd,rmfiles) 1134 @find . $(RCS_FIND_IGNORE) \ 1135 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1136 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1137 -o -name '*.symtypes' -o -name 'modules.order' \) \ 1138 -type f -print | xargs rm -f 1139 1140# mrproper - Delete all generated files, including .config 1141# 1142mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1143mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1144mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1145 1146PHONY += $(mrproper-dirs) mrproper archmrproper 1147$(mrproper-dirs): 1148 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1149 1150mrproper: clean archmrproper $(mrproper-dirs) 1151 $(call cmd,rmdirs) 1152 $(call cmd,rmfiles) 1153 1154# distclean 1155# 1156PHONY += distclean 1157 1158distclean: mrproper 1159 @find $(srctree) $(RCS_FIND_IGNORE) \ 1160 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1161 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1162 -o -name '.*.rej' -o -size 0 \ 1163 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1164 -type f -print | xargs rm -f 1165 1166 1167# Packaging of the kernel to various formats 1168# --------------------------------------------------------------------------- 1169# rpm target kept for backward compatibility 1170package-dir := $(srctree)/scripts/package 1171 1172%pkg: include/config/kernel.release FORCE 1173 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1174rpm: include/config/kernel.release FORCE 1175 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1176 1177 1178# Brief documentation of the typical targets used 1179# --------------------------------------------------------------------------- 1180 1181boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1182boards := $(notdir $(boards)) 1183board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1184board-dirs := $(sort $(notdir $(board-dirs:/=))) 1185 1186help: 1187 @echo 'Cleaning targets:' 1188 @echo ' clean - Remove most generated files but keep the config and' 1189 @echo ' enough build support to build external modules' 1190 @echo ' mrproper - Remove all generated files + config + various backup files' 1191 @echo ' distclean - mrproper + remove editor backup and patch files' 1192 @echo '' 1193 @echo 'Configuration targets:' 1194 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1195 @echo '' 1196 @echo 'Other generic targets:' 1197 @echo ' all - Build all targets marked with [*]' 1198 @echo '* vmlinux - Build the bare kernel' 1199 @echo '* modules - Build all modules' 1200 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1201 @echo ' dir/ - Build all files in dir and below' 1202 @echo ' dir/file.[ois] - Build specified target only' 1203 @echo ' dir/file.ko - Build module including final link' 1204 @echo ' prepare - Set up for building external modules' 1205 @echo ' tags/TAGS - Generate tags file for editors' 1206 @echo ' cscope - Generate cscope index' 1207 @echo ' kernelrelease - Output the release version string' 1208 @echo ' kernelversion - Output the version stored in Makefile' 1209 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1210 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1211 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1212 fi 1213 @echo '' 1214 @echo 'Static analysers' 1215 @echo ' checkstack - Generate a list of stack hogs' 1216 @echo ' namespacecheck - Name space analysis on compiled kernel' 1217 @echo ' versioncheck - Sanity check on version.h usage' 1218 @echo ' includecheck - Check for duplicate included header files' 1219 @echo ' export_report - List the usages of all exported symbols' 1220 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1221 echo ' headers_check - Sanity check on exported headers'; \ 1222 fi 1223 @echo '' 1224 @echo 'Kernel packaging:' 1225 @$(MAKE) $(build)=$(package-dir) help 1226 @echo '' 1227 @echo 'Documentation targets:' 1228 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1229 @echo '' 1230 @echo 'Architecture specific targets ($(SRCARCH)):' 1231 @$(if $(archhelp),$(archhelp),\ 1232 echo ' No architecture specific help defined for $(SRCARCH)') 1233 @echo '' 1234 @$(if $(boards), \ 1235 $(foreach b, $(boards), \ 1236 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1237 echo '') 1238 @$(if $(board-dirs), \ 1239 $(foreach b, $(board-dirs), \ 1240 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1241 printf " %-16s - Show all of the above\\n" help-boards; \ 1242 echo '') 1243 1244 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1245 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1246 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1247 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1248 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1249 @echo '' 1250 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1251 @echo 'For further info see the ./README file' 1252 1253 1254help-board-dirs := $(addprefix help-,$(board-dirs)) 1255 1256help-boards: $(help-board-dirs) 1257 1258boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1259 1260$(help-board-dirs): help-%: 1261 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1262 @$(if $(boards-per-dir), \ 1263 $(foreach b, $(boards-per-dir), \ 1264 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1265 echo '') 1266 1267 1268# Documentation targets 1269# --------------------------------------------------------------------------- 1270%docs: scripts_basic FORCE 1271 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1272 1273else # KBUILD_EXTMOD 1274 1275### 1276# External module support. 1277# When building external modules the kernel used as basis is considered 1278# read-only, and no consistency checks are made and the make 1279# system is not used on the basis kernel. If updates are required 1280# in the basis kernel ordinary make commands (without M=...) must 1281# be used. 1282# 1283# The following are the only valid targets when building external 1284# modules. 1285# make M=dir clean Delete all automatically generated files 1286# make M=dir modules Make all modules in specified dir 1287# make M=dir Same as 'make M=dir modules' 1288# make M=dir modules_install 1289# Install the modules built in the module directory 1290# Assumes install directory is already created 1291 1292# We are always building modules 1293KBUILD_MODULES := 1 1294PHONY += crmodverdir 1295crmodverdir: 1296 $(cmd_crmodverdir) 1297 1298PHONY += $(objtree)/Module.symvers 1299$(objtree)/Module.symvers: 1300 @test -e $(objtree)/Module.symvers || ( \ 1301 echo; \ 1302 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1303 echo " is missing; modules will have no dependencies and modversions."; \ 1304 echo ) 1305 1306module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1307PHONY += $(module-dirs) modules 1308$(module-dirs): crmodverdir $(objtree)/Module.symvers 1309 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1310 1311modules: $(module-dirs) 1312 @echo ' Building modules, stage 2.'; 1313 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1314 1315PHONY += modules_install 1316modules_install: _emodinst_ _emodinst_post 1317 1318install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1319PHONY += _emodinst_ 1320_emodinst_: 1321 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1322 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1323 1324PHONY += _emodinst_post 1325_emodinst_post: _emodinst_ 1326 $(call cmd,depmod) 1327 1328clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1329 1330PHONY += $(clean-dirs) clean 1331$(clean-dirs): 1332 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1333 1334clean: rm-dirs := $(MODVERDIR) 1335clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1336clean: $(clean-dirs) 1337 $(call cmd,rmdirs) 1338 $(call cmd,rmfiles) 1339 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1340 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1341 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1342 -type f -print | xargs rm -f 1343 1344help: 1345 @echo ' Building external modules.' 1346 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1347 @echo '' 1348 @echo ' modules - default target, build the module(s)' 1349 @echo ' modules_install - install the module' 1350 @echo ' clean - remove generated files in module directory only' 1351 @echo '' 1352 1353# Dummies... 1354PHONY += prepare scripts 1355prepare: ; 1356scripts: ; 1357endif # KBUILD_EXTMOD 1358 1359# Generate tags for editors 1360# --------------------------------------------------------------------------- 1361 1362#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1363#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1364#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1365 1366ifeq ($(src),$(obj)) 1367__srctree = 1368else 1369__srctree = $(srctree)/ 1370endif 1371 1372ifeq ($(ALLSOURCE_ARCHS),) 1373ifeq ($(ARCH),um) 1374ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1375else 1376ALLINCLUDE_ARCHS := $(SRCARCH) 1377endif 1378else 1379#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1380ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1381endif 1382 1383ALLSOURCE_ARCHS := $(SRCARCH) 1384 1385define find-sources 1386 ( for arch in $(ALLSOURCE_ARCHS) ; do \ 1387 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \ 1388 -name $1 -print; \ 1389 done ; \ 1390 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1391 -name $1 -print; \ 1392 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1393 \( -name config -o -name 'asm-*' \) -prune \ 1394 -o -name $1 -print; \ 1395 for arch in $(ALLINCLUDE_ARCHS) ; do \ 1396 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \ 1397 -name $1 -print; \ 1398 done ; \ 1399 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1400 -name $1 -print; \ 1401 find $(__srctree) $(RCS_FIND_IGNORE) \ 1402 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \ 1403 -name $1 -print; \ 1404 ) 1405endef 1406 1407define all-sources 1408 $(call find-sources,'*.[chS]') 1409endef 1410define all-kconfigs 1411 $(call find-sources,'Kconfig*') 1412endef 1413define all-defconfigs 1414 $(call find-sources,'defconfig') 1415endef 1416 1417define xtags 1418 if $1 --version 2>&1 | grep -iq exuberant; then \ 1419 $(all-sources) | xargs $1 -a \ 1420 -I __initdata,__exitdata,__acquires,__releases \ 1421 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \ 1422 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1423 --extra=+f --c-kinds=+px \ 1424 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ 1425 $(all-kconfigs) | xargs $1 -a \ 1426 --langdef=kconfig \ 1427 --language-force=kconfig \ 1428 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \ 1429 $(all-defconfigs) | xargs -r $1 -a \ 1430 --langdef=dotconfig \ 1431 --language-force=dotconfig \ 1432 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ 1433 elif $1 --version 2>&1 | grep -iq emacs; then \ 1434 $(all-sources) | xargs $1 -a; \ 1435 $(all-kconfigs) | xargs $1 -a \ 1436 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \ 1437 $(all-defconfigs) | xargs -r $1 -a \ 1438 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1439 else \ 1440 $(all-sources) | xargs $1 -a; \ 1441 fi 1442endef 1443 1444quiet_cmd_cscope-file = FILELST cscope.files 1445 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1446 1447quiet_cmd_cscope = MAKE cscope.out 1448 cmd_cscope = cscope -b 1449 1450cscope: FORCE 1451 $(call cmd,cscope-file) 1452 $(call cmd,cscope) 1453 1454quiet_cmd_TAGS = MAKE $@ 1455define cmd_TAGS 1456 rm -f $@; \ 1457 $(call xtags,etags) 1458endef 1459 1460TAGS: FORCE 1461 $(call cmd,TAGS) 1462 1463quiet_cmd_tags = MAKE $@ 1464define cmd_tags 1465 rm -f $@; \ 1466 $(call xtags,ctags) 1467endef 1468 1469tags: FORCE 1470 $(call cmd,tags) 1471 1472 1473# Scripts to check various things for consistency 1474# --------------------------------------------------------------------------- 1475 1476includecheck: 1477 find * $(RCS_FIND_IGNORE) \ 1478 -name '*.[hcS]' -type f -print | sort \ 1479 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1480 1481versioncheck: 1482 find * $(RCS_FIND_IGNORE) \ 1483 -name '*.[hcS]' -type f -print | sort \ 1484 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1485 1486namespacecheck: 1487 $(PERL) $(srctree)/scripts/namespace.pl 1488 1489export_report: 1490 $(PERL) $(srctree)/scripts/export_report.pl 1491 1492endif #ifeq ($(config-targets),1) 1493endif #ifeq ($(mixed-targets),1) 1494 1495PHONY += checkstack kernelrelease kernelversion 1496 1497# UML needs a little special treatment here. It wants to use the host 1498# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1499# else wants $(ARCH), including people doing cross-builds, which means 1500# that $(SUBARCH) doesn't work here. 1501ifeq ($(ARCH), um) 1502CHECKSTACK_ARCH := $(SUBARCH) 1503else 1504CHECKSTACK_ARCH := $(ARCH) 1505endif 1506checkstack: 1507 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1508 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1509 1510kernelrelease: 1511 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1512 $(error kernelrelease not valid - run 'make prepare' to update it)) 1513kernelversion: 1514 @echo $(KERNELVERSION) 1515 1516# Single targets 1517# --------------------------------------------------------------------------- 1518# Single targets are compatible with: 1519# - build with mixed source and output 1520# - build with separate output dir 'make O=...' 1521# - external modules 1522# 1523# target-dir => where to store outputfile 1524# build-dir => directory in kernel source tree to use 1525 1526ifeq ($(KBUILD_EXTMOD),) 1527 build-dir = $(patsubst %/,%,$(dir $@)) 1528 target-dir = $(dir $@) 1529else 1530 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1531 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1532 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1533endif 1534 1535%.s: %.c prepare scripts FORCE 1536 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1537%.i: %.c prepare scripts FORCE 1538 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1539%.o: %.c prepare scripts FORCE 1540 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1541%.lst: %.c prepare scripts FORCE 1542 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1543%.s: %.S prepare scripts FORCE 1544 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1545%.o: %.S prepare scripts FORCE 1546 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1547%.symtypes: %.c prepare scripts FORCE 1548 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1549 1550# Modules 1551/ %/: prepare scripts FORCE 1552 $(cmd_crmodverdir) 1553 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1554 $(build)=$(build-dir) 1555%.ko: prepare scripts FORCE 1556 $(cmd_crmodverdir) 1557 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1558 $(build)=$(build-dir) $(@:.ko=.o) 1559 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1560 1561# FIXME Should go into a make.lib or something 1562# =========================================================================== 1563 1564quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1565 cmd_rmdirs = rm -rf $(rm-dirs) 1566 1567quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1568 cmd_rmfiles = rm -f $(rm-files) 1569 1570# Run depmod only if we have System.map and depmod is executable 1571quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1572 cmd_depmod = \ 1573 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1574 $(DEPMOD) -ae -F System.map \ 1575 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ 1576 $(KERNELRELEASE); \ 1577 fi 1578 1579# Create temporary dir for module support files 1580# clean it up only when building all modules 1581cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1582 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1583 1584a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1585 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \ 1586 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1587 1588quiet_cmd_as_o_S = AS $@ 1589cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1590 1591# read all saved command lines 1592 1593targets := $(wildcard $(sort $(targets))) 1594cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1595 1596ifneq ($(cmd_files),) 1597 $(cmd_files): ; # Do not try to update included dependency files 1598 include $(cmd_files) 1599endif 1600 1601# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1602# Usage: 1603# $(Q)$(MAKE) $(clean)=dir 1604clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1605 1606endif # skip-makefile 1607 1608PHONY += FORCE 1609FORCE: 1610 1611# Declare the contents of the .PHONY variable as phony. We keep that 1612# information in a variable se we can use it in if_changed and friends. 1613.PHONY: $(PHONY) 1614