1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 13 4EXTRAVERSION = 5NAME=Affluent Albatross 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 print "Entering directory ..." 14MAKEFLAGS += --no-print-directory 15 16# We are using a recursive build, so we need to do a little thinking 17# to get the ordering right. 18# 19# Most importantly: sub-Makefiles should only ever modify files in 20# their own directory. If in some directory we have a dependency on 21# a file in another dir (which doesn't happen often, but it's often 22# unavoidable when linking the built-in.o targets which finally 23# turn into vmlinux), we will call a sub make in that other dir, and 24# after that we are sure that everything which is in that other dir 25# is now up to date. 26# 27# The only cases where we need to modify files which have global 28# effects are thus separated out and done before the recursive 29# descending is started. They are now explicitly listed as the 30# prepare rule. 31 32# To put more focus on warnings, be less verbose as default 33# Use 'make V=1' to see the full commands 34 35ifdef V 36 ifeq ("$(origin V)", "command line") 37 KBUILD_VERBOSE = $(V) 38 endif 39endif 40ifndef KBUILD_VERBOSE 41 KBUILD_VERBOSE = 0 42endif 43 44# Call sparse as part of compilation of C files 45# Use 'make C=1' to enable sparse checking 46 47ifdef C 48 ifeq ("$(origin C)", "command line") 49 KBUILD_CHECKSRC = $(C) 50 endif 51endif 52ifndef KBUILD_CHECKSRC 53 KBUILD_CHECKSRC = 0 54endif 55 56# Use make M=dir to specify directory of external module to build 57# Old syntax make ... SUBDIRS=$PWD is still supported 58# Setting the environment variable KBUILD_EXTMOD take precedence 59ifdef SUBDIRS 60 KBUILD_EXTMOD ?= $(SUBDIRS) 61endif 62ifdef M 63 ifeq ("$(origin M)", "command line") 64 KBUILD_EXTMOD := $(M) 65 endif 66endif 67 68 69# kbuild supports saving output files in a separate directory. 70# To locate output files in a separate directory two syntaxes are supported. 71# In both cases the working directory must be the root of the kernel src. 72# 1) O= 73# Use "make O=dir/to/store/output/files/" 74# 75# 2) Set KBUILD_OUTPUT 76# Set the environment variable KBUILD_OUTPUT to point to the directory 77# where the output files shall be placed. 78# export KBUILD_OUTPUT=dir/to/store/output/files/ 79# make 80# 81# The O= assignment takes precedence over the KBUILD_OUTPUT environment 82# variable. 83 84 85# KBUILD_SRC is set on invocation of make in OBJ directory 86# KBUILD_SRC is not intended to be used by the regular user (for now) 87ifeq ($(KBUILD_SRC),) 88 89# OK, Make called in directory where kernel src resides 90# Do we want to locate output files in a separate directory? 91ifdef O 92 ifeq ("$(origin O)", "command line") 93 KBUILD_OUTPUT := $(O) 94 endif 95endif 96 97# That's our default target when none is given on the command line 98.PHONY: _all 99_all: 100 101ifneq ($(KBUILD_OUTPUT),) 102# Invoke a second make in the output directory, passing relevant variables 103# check that the output directory actually exists 104saved-output := $(KBUILD_OUTPUT) 105KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 106$(if $(KBUILD_OUTPUT),, \ 107 $(error output directory "$(saved-output)" does not exist)) 108 109.PHONY: $(MAKECMDGOALS) 110 111$(filter-out _all,$(MAKECMDGOALS)) _all: 112 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 113 KBUILD_SRC=$(CURDIR) \ 114 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ 115 116# Leave processing to above invocation of make 117skip-makefile := 1 118endif # ifneq ($(KBUILD_OUTPUT),) 119endif # ifeq ($(KBUILD_SRC),) 120 121# We process the rest of the Makefile if this is the final invocation of make 122ifeq ($(skip-makefile),) 123 124# If building an external module we do not care about the all: rule 125# but instead _all depend on modules 126.PHONY: all 127ifeq ($(KBUILD_EXTMOD),) 128_all: all 129else 130_all: modules 131endif 132 133srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 134TOPDIR := $(srctree) 135# FIXME - TOPDIR is obsolete, use srctree/objtree 136objtree := $(CURDIR) 137src := $(srctree) 138obj := $(objtree) 139 140VPATH := $(srctree) 141 142export srctree objtree VPATH TOPDIR 143 144nullstring := 145space := $(nullstring) # end of line 146 147# Take the contents of any files called localversion* and the config 148# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be 149# careful not to include files twice if building in the source 150# directory. LOCALVERSION from the command line override all of this 151 152localver := $(objtree)/localversion* $(srctree)/localversion* 153localver := $(sort $(wildcard $(localver))) 154# skip backup files (containing '~') 155localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f))) 156 157LOCALVERSION = $(subst $(space),, \ 158 $(shell cat /dev/null $(localver)) \ 159 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 160 161KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION) 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/ ) 172 173# Cross compiling and selecting different set of gcc/bin-utils 174# --------------------------------------------------------------------------- 175# 176# When performing cross compilation for other architectures ARCH shall be set 177# to the target architecture. (See arch/* for the possibilities). 178# ARCH can be set during invocation of make: 179# make ARCH=ia64 180# Another way is to have ARCH set in the environment. 181# The default ARCH is the host where make is executed. 182 183# CROSS_COMPILE specify the prefix used for all executables used 184# during compilation. Only gcc and related bin-utils executables 185# are prefixed with $(CROSS_COMPILE). 186# CROSS_COMPILE can be set on the command line 187# make CROSS_COMPILE=ia64-linux- 188# Alternatively CROSS_COMPILE can be set in the environment. 189# Default value for CROSS_COMPILE is not to prefix executables 190# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 191 192ARCH ?= $(SUBARCH) 193CROSS_COMPILE ?= 194 195# Architecture as present in compile.h 196UTS_MACHINE := $(ARCH) 197 198# SHELL used by kbuild 199CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 200 else if [ -x /bin/bash ]; then echo /bin/bash; \ 201 else echo sh; fi ; fi) 202 203HOSTCC = gcc 204HOSTCXX = g++ 205HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 206HOSTCXXFLAGS = -O2 207 208# Decide whether to build built-in, modular, or both. 209# Normally, just do built-in. 210 211KBUILD_MODULES := 212KBUILD_BUILTIN := 1 213 214# If we have only "make modules", don't compile built-in objects. 215# When we're building modules with modversions, we need to consider 216# the built-in objects during the descend as well, in order to 217# make sure the checksums are uptodate before we record them. 218 219ifeq ($(MAKECMDGOALS),modules) 220 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 221endif 222 223# If we have "make <whatever> modules", compile modules 224# in addition to whatever we do anyway. 225# Just "make" or "make all" shall build modules as well 226 227ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 228 KBUILD_MODULES := 1 229endif 230 231ifeq ($(MAKECMDGOALS),) 232 KBUILD_MODULES := 1 233endif 234 235export KBUILD_MODULES KBUILD_BUILTIN 236export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 237 238# Beautify output 239# --------------------------------------------------------------------------- 240# 241# Normally, we echo the whole command before executing it. By making 242# that echo $($(quiet)$(cmd)), we now have the possibility to set 243# $(quiet) to choose other forms of output instead, e.g. 244# 245# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 246# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 247# 248# If $(quiet) is empty, the whole command will be printed. 249# If it is set to "quiet_", only the short version will be printed. 250# If it is set to "silent_", nothing wil be printed at all, since 251# the variable $(silent_cmd_cc_o_c) doesn't exist. 252# 253# A simple variant is to prefix commands with $(Q) - that's usefull 254# for commands that shall be hidden in non-verbose mode. 255# 256# $(Q)ln $@ :< 257# 258# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 259# If KBUILD_VERBOSE equals 1 then the above command is displayed. 260 261ifeq ($(KBUILD_VERBOSE),1) 262 quiet = 263 Q = 264else 265 quiet=quiet_ 266 Q = @ 267endif 268 269# If the user is running make -s (silent mode), suppress echoing of 270# commands 271 272ifneq ($(findstring s,$(MAKEFLAGS)),) 273 quiet=silent_ 274endif 275 276export quiet Q KBUILD_VERBOSE 277 278###### 279# cc support functions to be used (only) in arch/$(ARCH)/Makefile 280# See documentation in Documentation/kbuild/makefiles.txt 281 282# cc-option 283# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586) 284 285cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 286 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) 287 288# For backward compatibility 289check_gcc = $(warning check_gcc is deprecated - use cc-option) \ 290 $(call cc-option, $(1),$(2)) 291 292# cc-option-yn 293# Usage: flag := $(call cc-option-yn, -march=winchip-c6) 294cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 295 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) 296 297# cc-option-align 298# Prefix align with either -falign or -malign 299cc-option-align = $(subst -functions=0,,\ 300 $(call cc-option,-falign-functions=0,-malign-functions=0)) 301 302# cc-version 303# Usage gcc-ver := $(call cc-version $(CC)) 304cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \ 305 $(if $(1), $(1), $(CC))) 306 307 308# Look for make include files relative to root of kernel src 309MAKEFLAGS += --include-dir=$(srctree) 310 311# We need some generic definitions 312include $(srctree)/scripts/Kbuild.include 313 314# For maximum performance (+ possibly random breakage, uncomment 315# the following) 316 317#MAKEFLAGS += -rR 318 319# Make variables (CC, etc...) 320 321AS = $(CROSS_COMPILE)as 322LD = $(CROSS_COMPILE)ld 323CC = $(CROSS_COMPILE)gcc 324CPP = $(CC) -E 325AR = $(CROSS_COMPILE)ar 326NM = $(CROSS_COMPILE)nm 327STRIP = $(CROSS_COMPILE)strip 328OBJCOPY = $(CROSS_COMPILE)objcopy 329OBJDUMP = $(CROSS_COMPILE)objdump 330AWK = awk 331GENKSYMS = scripts/genksyms/genksyms 332DEPMOD = /sbin/depmod 333KALLSYMS = scripts/kallsyms 334PERL = perl 335CHECK = sparse 336 337CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ 338MODFLAGS = -DMODULE 339CFLAGS_MODULE = $(MODFLAGS) 340AFLAGS_MODULE = $(MODFLAGS) 341LDFLAGS_MODULE = -r 342CFLAGS_KERNEL = 343AFLAGS_KERNEL = 344 345 346# Use LINUXINCLUDE when you must reference the include/ directory. 347# Needed to be compatible with the O= option 348LINUXINCLUDE := -Iinclude \ 349 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) 350 351CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 352 353CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 354 -fno-strict-aliasing -fno-common \ 355 -ffreestanding 356AFLAGS := -D__ASSEMBLY__ 357 358export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \ 359 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ 360 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ 361 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 362 363export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 364export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 365export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 366 367# When compiling out-of-tree modules, put MODVERDIR in the module 368# tree rather than in the kernel tree. The kernel tree might 369# even be read-only. 370export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 371 372# Files to ignore in find ... statements 373 374RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg \) -prune -o 375RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg 376 377# =========================================================================== 378# Rules shared between *config targets and build targets 379 380# Basic helpers built in scripts/ 381.PHONY: scripts_basic 382scripts_basic: 383 $(Q)$(MAKE) $(build)=scripts/basic 384 385.PHONY: outputmakefile 386# outputmakefile generate a Makefile to be placed in output directory, if 387# using a seperate output directory. This allows convinient use 388# of make in output directory 389outputmakefile: 390 $(Q)if test ! $(srctree) -ef $(objtree); then \ 391 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 392 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ 393 > $(objtree)/Makefile; \ 394 echo ' GEN $(objtree)/Makefile'; \ 395 fi 396 397# To make sure we do not include .config for any of the *config targets 398# catch them early, and hand them over to scripts/kconfig/Makefile 399# It is allowed to specify more targets when calling make, including 400# mixing *config targets and build targets. 401# For example 'make oldconfig all'. 402# Detect when mixed targets is specified, and make a second invocation 403# of make so .config is not included in this case either (for *config). 404 405no-dot-config-targets := clean mrproper distclean \ 406 cscope TAGS tags help %docs check% 407 408config-targets := 0 409mixed-targets := 0 410dot-config := 1 411 412ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 413 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 414 dot-config := 0 415 endif 416endif 417 418ifeq ($(KBUILD_EXTMOD),) 419 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 420 config-targets := 1 421 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 422 mixed-targets := 1 423 endif 424 endif 425endif 426 427ifeq ($(mixed-targets),1) 428# =========================================================================== 429# We're called with mixed targets (*config and build targets). 430# Handle them one by one. 431 432%:: FORCE 433 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 434 435else 436ifeq ($(config-targets),1) 437# =========================================================================== 438# *config targets only - make sure prerequisites are updated, and descend 439# in scripts/kconfig to make the *config target 440 441# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 442# KBUILD_DEFCONFIG may point out an alternative default configuration 443# used for 'make defconfig' 444include $(srctree)/arch/$(ARCH)/Makefile 445export KBUILD_DEFCONFIG 446 447config: scripts_basic outputmakefile FORCE 448 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 449%config: scripts_basic outputmakefile FORCE 450 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 451 452else 453# =========================================================================== 454# Build targets only - this includes vmlinux, arch specific targets, clean 455# targets and others. In general all targets except *config targets. 456 457ifeq ($(KBUILD_EXTMOD),) 458# Additional helpers built in scripts/ 459# Carefully list dependencies so we do not try to build scripts twice 460# in parrallel 461.PHONY: scripts 462scripts: scripts_basic include/config/MARKER 463 $(Q)$(MAKE) $(build)=$(@) 464 465scripts_basic: include/linux/autoconf.h 466 467# Objects we will link into vmlinux / subdirs we need to visit 468init-y := init/ 469drivers-y := drivers/ sound/ 470net-y := net/ 471libs-y := lib/ 472core-y := usr/ 473endif # KBUILD_EXTMOD 474 475ifeq ($(dot-config),1) 476# In this section, we need .config 477 478# Read in dependencies to all Kconfig* files, make sure to run 479# oldconfig if changes are detected. 480-include .config.cmd 481 482include .config 483 484# If .config needs to be updated, it will be done via the dependency 485# that autoconf has on .config. 486# To avoid any implicit rule to kick in, define an empty command 487.config: ; 488 489# If .config is newer than include/linux/autoconf.h, someone tinkered 490# with it and forgot to run make oldconfig 491include/linux/autoconf.h: .config 492 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 493else 494# Dummy target needed, because used as prerequisite 495include/linux/autoconf.h: ; 496endif 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 overriden in the arch makefile 502all: vmlinux 503 504ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 505CFLAGS += -Os 506else 507CFLAGS += -O2 508endif 509 510#Add align options if CONFIG_CC_* is not equal to 0 511add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1))) 512CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions) 513CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels) 514CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops) 515CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps) 516 517ifdef CONFIG_FRAME_POINTER 518CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) 519else 520CFLAGS += -fomit-frame-pointer 521endif 522 523ifdef CONFIG_DEBUG_INFO 524CFLAGS += -g 525endif 526 527include $(srctree)/arch/$(ARCH)/Makefile 528 529# arch Makefile may override CC so keep this after arch Makefile is included 530NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 531CHECKFLAGS += $(NOSTDINC_FLAGS) 532 533# warn about C99 declaration after statement 534CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 535 536# disable pointer signedness warnings in gcc 4.0 537CFLAGS += $(call cc-option,-Wno-pointer-sign,) 538 539# Default kernel image to build when no specific target is given. 540# KBUILD_IMAGE may be overruled on the commandline or 541# set in the environment 542# Also any assignments in arch/$(ARCH)/Makefile take precedence over 543# this default value 544export KBUILD_IMAGE ?= vmlinux 545 546# 547# INSTALL_PATH specifies where to place the updated kernel and system map 548# images. Default is /boot, but you can set it to other values 549export INSTALL_PATH ?= /boot 550 551# If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests 552# and try to determine if the current source tree is a release tree, of any sort, 553# or if is a pure development tree. 554# 555# A 'release tree' is any tree with a git TAG associated 556# with it. The primary goal of this is to make it safe for a native 557# git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to 558# continue developing against the current Linus tree, without having the Linus 559# tree overwrite the 2.6.9 tree when installed. 560# 561# Currently, only git is supported. 562# Other SCMs can edit scripts/setlocalversion and add the appropriate 563# checks as needed. 564 565 566ifdef CONFIG_LOCALVERSION_AUTO 567 localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree)) 568 LOCALVERSION := $(LOCALVERSION)$(localversion-auto) 569endif 570 571# 572# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 573# relocations required by build roots. This is not defined in the 574# makefile but the arguement can be passed to make if needed. 575# 576 577MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 578export MODLIB 579 580 581ifeq ($(KBUILD_EXTMOD),) 582core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ 583 584vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 585 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 586 $(net-y) $(net-m) $(libs-y) $(libs-m))) 587 588vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 589 $(init-n) $(init-) \ 590 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 591 $(net-n) $(net-) $(libs-n) $(libs-)))) 592 593init-y := $(patsubst %/, %/built-in.o, $(init-y)) 594core-y := $(patsubst %/, %/built-in.o, $(core-y)) 595drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 596net-y := $(patsubst %/, %/built-in.o, $(net-y)) 597libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 598libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 599libs-y := $(libs-y1) $(libs-y2) 600 601# Build vmlinux 602# --------------------------------------------------------------------------- 603# vmlinux is build from the objects selected by $(vmlinux-init) and 604# $(vmlinux-main). Most are built-in.o files from top-level directories 605# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 606# Ordering when linking is important, and $(vmlinux-init) must be first. 607# 608# vmlinux 609# ^ 610# | 611# +-< $(vmlinux-init) 612# | +--< init/version.o + more 613# | 614# +--< $(vmlinux-main) 615# | +--< driver/built-in.o mm/built-in.o + more 616# | 617# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 618# 619# vmlinux version (uname -v) cannot be updated during normal 620# descending-into-subdirs phase since we do not yet know if we need to 621# update vmlinux. 622# Therefore this step is delayed until just before final link of vmlinux - 623# except in the kallsyms case where it is done just before adding the 624# symbols to the kernel. 625# 626# System.map is generated to document addresses of all kernel symbols 627 628vmlinux-init := $(head-y) $(init-y) 629vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 630vmlinux-all := $(vmlinux-init) $(vmlinux-main) 631vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 632 633# Rule to link vmlinux - also used during CONFIG_KALLSYMS 634# May be overridden by arch/$(ARCH)/Makefile 635quiet_cmd_vmlinux__ ?= LD $@ 636 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 637 -T $(vmlinux-lds) $(vmlinux-init) \ 638 --start-group $(vmlinux-main) --end-group \ 639 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 640 641# Generate new vmlinux version 642quiet_cmd_vmlinux_version = GEN .version 643 cmd_vmlinux_version = set -e; \ 644 . $(srctree)/scripts/mkversion > .tmp_version; \ 645 mv -f .tmp_version .version; \ 646 $(MAKE) $(build)=init 647 648# Generate System.map 649quiet_cmd_sysmap = SYSMAP 650 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 651 652# Link of vmlinux 653# If CONFIG_KALLSYMS is set .version is already updated 654# Generate System.map and verify that the content is consistent 655 656define rule_vmlinux__ 657 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 658 659 $(call cmd,vmlinux__) 660 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 661 662 $(Q)$(if $($(quiet)cmd_sysmap), \ 663 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 664 $(cmd_sysmap) $@ System.map; \ 665 if [ $$? -ne 0 ]; then \ 666 rm -f $@; \ 667 /bin/false; \ 668 fi; 669 $(verify_kallsyms) 670endef 671 672 673ifdef CONFIG_KALLSYMS 674# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 675# It's a three stage process: 676# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 677# empty 678# Running kallsyms on that gives us .tmp_kallsyms1.o with 679# the right size - vmlinux version (uname -v) is updated during this step 680# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 681# but due to the added section, some addresses have shifted. 682# From here, we generate a correct .tmp_kallsyms2.o 683# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 684# o Verify that the System.map from vmlinux matches the map from 685# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 686# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 687# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 688# temporary bypass to allow the kernel to be built while the 689# maintainers work out what went wrong with kallsyms. 690 691ifdef CONFIG_KALLSYMS_EXTRA_PASS 692last_kallsyms := 3 693else 694last_kallsyms := 2 695endif 696 697kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 698 699define verify_kallsyms 700 $(Q)$(if $($(quiet)cmd_sysmap), \ 701 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 702 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 703 $(Q)cmp -s System.map .tmp_System.map || \ 704 (echo Inconsistent kallsyms data; \ 705 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 706 rm .tmp_kallsyms* ; /bin/false ) 707endef 708 709# Update vmlinux version before link 710# Use + in front of this rule to silent warning about make -j1 711# First command is ':' to allow us to use + in front of this rule 712cmd_ksym_ld = $(cmd_vmlinux__) 713define rule_ksym_ld 714 : 715 +$(call cmd,vmlinux_version) 716 $(call cmd,vmlinux__) 717 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 718endef 719 720# Generate .S file with all kernel symbols 721quiet_cmd_kallsyms = KSYM $@ 722 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 723 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 724 725.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 726 $(call if_changed_dep,as_o_S) 727 728.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 729 $(call cmd,kallsyms) 730 731# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 732.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 733 $(call if_changed_rule,ksym_ld) 734 735.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 736 $(call if_changed,vmlinux__) 737 738.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 739 $(call if_changed,vmlinux__) 740 741# Needs to visit scripts/ before $(KALLSYMS) can be used. 742$(KALLSYMS): scripts ; 743 744# Generate some data for debugging strange kallsyms problems 745debug_kallsyms: .tmp_map$(last_kallsyms) 746 747.tmp_map%: .tmp_vmlinux% FORCE 748 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 749 750.tmp_map3: .tmp_map2 751 752.tmp_map2: .tmp_map1 753 754endif # ifdef CONFIG_KALLSYMS 755 756# vmlinux image - including updated kernel symbols 757vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 758 $(call if_changed_rule,vmlinux__) 759 760# The actual objects are generated when descending, 761# make sure no implicit rule kicks in 762$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 763 764# Handle descending into subdirectories listed in $(vmlinux-dirs) 765# Preset locale variables to speed up the build process. Limit locale 766# tweaks to this spot to avoid wrong language settings when running 767# make menuconfig etc. 768# Error messages still appears in the original language 769 770.PHONY: $(vmlinux-dirs) 771$(vmlinux-dirs): prepare-all scripts 772 $(Q)$(MAKE) $(build)=$@ 773 774# Things we need to do before we recursively start building the kernel 775# or the modules are listed in "prepare-all". 776# A multi level approach is used. prepare1 is updated first, then prepare0. 777# prepare-all is the collection point for the prepare targets. 778 779.PHONY: prepare-all prepare prepare0 prepare1 prepare2 780 781# prepare2 is used to check if we are building in a separate output directory, 782# and if so do: 783# 1) Check that make has not been executed in the kernel src $(srctree) 784# 2) Create the include2 directory, used for the second asm symlink 785 786prepare2: 787ifneq ($(KBUILD_SRC),) 788 @echo ' Using $(srctree) as source for kernel' 789 $(Q)if [ -f $(srctree)/.config ]; then \ 790 echo " $(srctree) is not clean, please run 'make mrproper'";\ 791 echo " in the '$(srctree)' directory.";\ 792 /bin/false; \ 793 fi; 794 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 795 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 796endif 797 798# prepare1 creates a makefile if using a separate output directory 799prepare1: prepare2 outputmakefile 800 801prepare0: prepare1 include/linux/version.h include/asm \ 802 include/config/MARKER 803ifneq ($(KBUILD_MODULES),) 804 $(Q)rm -rf $(MODVERDIR) 805 $(Q)mkdir -p $(MODVERDIR) 806endif 807 808# All the preparing.. 809prepare-all: prepare0 prepare 810 811# Leave this as default for preprocessing vmlinux.lds.S, which is now 812# done in arch/$(ARCH)/kernel/Makefile 813 814export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 815 816# Single targets 817# --------------------------------------------------------------------------- 818 819%.s: %.c scripts FORCE 820 $(Q)$(MAKE) $(build)=$(@D) $@ 821%.i: %.c scripts FORCE 822 $(Q)$(MAKE) $(build)=$(@D) $@ 823%.o: %.c scripts FORCE 824 $(Q)$(MAKE) $(build)=$(@D) $@ 825%.ko: scripts FORCE 826 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o) 827 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 828%/: scripts prepare FORCE 829 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) 830%.lst: %.c scripts FORCE 831 $(Q)$(MAKE) $(build)=$(@D) $@ 832%.s: %.S scripts FORCE 833 $(Q)$(MAKE) $(build)=$(@D) $@ 834%.o: %.S scripts FORCE 835 $(Q)$(MAKE) $(build)=$(@D) $@ 836 837# FIXME: The asm symlink changes when $(ARCH) changes. That's 838# hard to detect, but I suppose "make mrproper" is a good idea 839# before switching between archs anyway. 840 841include/asm: 842 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 843 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 844 @ln -fsn asm-$(ARCH) $@ 845 846# Split autoconf.h into include/linux/config/* 847 848include/config/MARKER: include/linux/autoconf.h 849 @echo ' SPLIT include/linux/autoconf.h -> include/config/*' 850 @scripts/basic/split-include include/linux/autoconf.h include/config 851 @touch $@ 852 853# Generate some files 854# --------------------------------------------------------------------------- 855 856# KERNELRELEASE can change from a few different places, meaning version.h 857# needs to be updated, so this check is forced on all builds 858 859uts_len := 64 860 861define filechk_version.h 862 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 863 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 864 exit 1; \ 865 fi; \ 866 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ 867 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ 868 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ 869 ) 870endef 871 872include/linux/version.h: $(srctree)/Makefile FORCE 873 $(call filechk,version.h) 874 875# --------------------------------------------------------------------------- 876 877.PHONY: depend dep 878depend dep: 879 @echo '*** Warning: make $@ is unnecessary now.' 880 881# --------------------------------------------------------------------------- 882# Modules 883 884ifdef CONFIG_MODULES 885 886# By default, build modules as well 887 888all: modules 889 890# Build modules 891 892.PHONY: modules 893modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 894 @echo ' Building modules, stage 2.'; 895 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 896 897 898# Target to prepare building external modules 899.PHONY: modules_prepare 900modules_prepare: prepare-all scripts 901 902# Target to install modules 903.PHONY: modules_install 904modules_install: _modinst_ _modinst_post 905 906.PHONY: _modinst_ 907_modinst_: 908 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 909 echo "Warning: you may need to install module-init-tools"; \ 910 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 911 sleep 1; \ 912 fi 913 @rm -rf $(MODLIB)/kernel 914 @rm -f $(MODLIB)/source 915 @mkdir -p $(MODLIB)/kernel 916 @ln -s $(srctree) $(MODLIB)/source 917 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 918 rm -f $(MODLIB)/build ; \ 919 ln -s $(objtree) $(MODLIB)/build ; \ 920 fi 921 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 922 923# If System.map exists, run depmod. This deliberately does not have a 924# dependency on System.map since that would run the dependency tree on 925# vmlinux. This depmod is only for convenience to give the initial 926# boot a modules.dep even before / is mounted read-write. However the 927# boot script depmod is the master version. 928ifeq "$(strip $(INSTALL_MOD_PATH))" "" 929depmod_opts := 930else 931depmod_opts := -b $(INSTALL_MOD_PATH) -r 932endif 933.PHONY: _modinst_post 934_modinst_post: _modinst_ 935 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 936 937else # CONFIG_MODULES 938 939# Modules not configured 940# --------------------------------------------------------------------------- 941 942modules modules_install: FORCE 943 @echo 944 @echo "The present kernel configuration has modules disabled." 945 @echo "Type 'make config' and enable loadable module support." 946 @echo "Then build a kernel with module support enabled." 947 @echo 948 @exit 1 949 950endif # CONFIG_MODULES 951 952# Generate asm-offsets.h 953# --------------------------------------------------------------------------- 954 955define filechk_gen-asm-offsets 956 (set -e; \ 957 echo "#ifndef __ASM_OFFSETS_H__"; \ 958 echo "#define __ASM_OFFSETS_H__"; \ 959 echo "/*"; \ 960 echo " * DO NOT MODIFY."; \ 961 echo " *"; \ 962 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 963 echo " *"; \ 964 echo " */"; \ 965 echo ""; \ 966 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 967 echo ""; \ 968 echo "#endif" ) 969endef 970 971 972### 973# Cleaning is done on three levels. 974# make clean Delete most generated files 975# Leave enough to build external modules 976# make mrproper Delete the current configuration, and all generated files 977# make distclean Remove editor backup files, patch leftover files and the like 978 979# Directories & files removed with 'make clean' 980CLEAN_DIRS += $(MODVERDIR) 981CLEAN_FILES += vmlinux System.map \ 982 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 983 984# Directories & files removed with 'make mrproper' 985MRPROPER_DIRS += include/config include2 986MRPROPER_FILES += .config .config.old include/asm .version \ 987 include/linux/autoconf.h include/linux/version.h \ 988 Module.symvers tags TAGS cscope* 989 990# clean - Delete most, but leave enough to build external modules 991# 992clean: rm-dirs := $(CLEAN_DIRS) 993clean: rm-files := $(CLEAN_FILES) 994clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs)) 995 996.PHONY: $(clean-dirs) clean archclean 997$(clean-dirs): 998 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 999 1000clean: archclean $(clean-dirs) 1001 $(call cmd,rmdirs) 1002 $(call cmd,rmfiles) 1003 @find . $(RCS_FIND_IGNORE) \ 1004 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1005 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1006 -type f -print | xargs rm -f 1007 1008# mrproper - Delete all generated files, including .config 1009# 1010mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1011mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1012mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1013 1014.PHONY: $(mrproper-dirs) mrproper archmrproper 1015$(mrproper-dirs): 1016 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1017 1018mrproper: clean archmrproper $(mrproper-dirs) 1019 $(call cmd,rmdirs) 1020 $(call cmd,rmfiles) 1021 1022# distclean 1023# 1024.PHONY: distclean 1025 1026distclean: mrproper 1027 @find $(srctree) $(RCS_FIND_IGNORE) \ 1028 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1029 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1030 -o -name '.*.rej' -o -size 0 \ 1031 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1032 -type f -print | xargs rm -f 1033 1034 1035# Packaging of the kernel to various formats 1036# --------------------------------------------------------------------------- 1037# rpm target kept for backward compatibility 1038package-dir := $(srctree)/scripts/package 1039 1040.PHONY: %-pkg rpm 1041 1042%pkg: FORCE 1043 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 1044rpm: FORCE 1045 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 1046 1047 1048# Brief documentation of the typical targets used 1049# --------------------------------------------------------------------------- 1050 1051boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1052boards := $(notdir $(boards)) 1053 1054help: 1055 @echo 'Cleaning targets:' 1056 @echo ' clean - remove most generated files but keep the config' 1057 @echo ' mrproper - remove all generated files + config + various backup files' 1058 @echo '' 1059 @echo 'Configuration targets:' 1060 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1061 @echo '' 1062 @echo 'Other generic targets:' 1063 @echo ' all - Build all targets marked with [*]' 1064 @echo '* vmlinux - Build the bare kernel' 1065 @echo '* modules - Build all modules' 1066 @echo ' modules_install - Install all modules' 1067 @echo ' dir/ - Build all files in dir and below' 1068 @echo ' dir/file.[ois] - Build specified target only' 1069 @echo ' dir/file.ko - Build module including final link' 1070 @echo ' rpm - Build a kernel as an RPM package' 1071 @echo ' tags/TAGS - Generate tags file for editors' 1072 @echo ' cscope - Generate cscope index' 1073 @echo '' 1074 @echo 'Static analysers' 1075 @echo ' buildcheck - List dangling references to vmlinux discarded sections' 1076 @echo ' and init sections from non-init sections' 1077 @echo ' checkstack - Generate a list of stack hogs' 1078 @echo ' namespacecheck - Name space analysis on compiled kernel' 1079 @echo '' 1080 @echo 'Kernel packaging:' 1081 @$(MAKE) -f $(package-dir)/Makefile help 1082 @echo '' 1083 @echo 'Documentation targets:' 1084 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1085 @echo '' 1086 @echo 'Architecture specific targets ($(ARCH)):' 1087 @$(if $(archhelp),$(archhelp),\ 1088 echo ' No architecture specific help defined for $(ARCH)') 1089 @echo '' 1090 @$(if $(boards), \ 1091 $(foreach b, $(boards), \ 1092 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1093 echo '') 1094 1095 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1096 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1097 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' 1098 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' 1099 @echo '' 1100 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1101 @echo 'For further info see the ./README file' 1102 1103 1104# Documentation targets 1105# --------------------------------------------------------------------------- 1106%docs: scripts_basic FORCE 1107 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1108 1109else # KBUILD_EXTMOD 1110 1111### 1112# External module support. 1113# When building external modules the kernel used as basis is considered 1114# read-only, and no consistency checks are made and the make 1115# system is not used on the basis kernel. If updates are required 1116# in the basis kernel ordinary make commands (without M=...) must 1117# be used. 1118# 1119# The following are the only valid targets when building external 1120# modules. 1121# make M=dir clean Delete all automatically generated files 1122# make M=dir modules Make all modules in specified dir 1123# make M=dir Same as 'make M=dir modules' 1124# make M=dir modules_install 1125# Install the modules build in the module directory 1126# Assumes install directory is already created 1127 1128# We are always building modules 1129KBUILD_MODULES := 1 1130.PHONY: crmodverdir 1131crmodverdir: 1132 $(Q)mkdir -p $(MODVERDIR) 1133 1134.PHONY: $(objtree)/Module.symvers 1135$(objtree)/Module.symvers: 1136 @test -e $(objtree)/Module.symvers || ( \ 1137 echo; \ 1138 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1139 echo " is missing; modules will have no dependencies and modversions."; \ 1140 echo ) 1141 1142module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1143.PHONY: $(module-dirs) modules 1144$(module-dirs): crmodverdir $(objtree)/Module.symvers 1145 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1146 1147modules: $(module-dirs) 1148 @echo ' Building modules, stage 2.'; 1149 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1150 1151.PHONY: modules_install 1152modules_install: 1153 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1154 1155clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1156 1157.PHONY: $(clean-dirs) clean 1158$(clean-dirs): 1159 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1160 1161clean: rm-dirs := $(MODVERDIR) 1162clean: $(clean-dirs) 1163 $(call cmd,rmdirs) 1164 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1165 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1166 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1167 -type f -print | xargs rm -f 1168 1169help: 1170 @echo ' Building external modules.' 1171 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1172 @echo '' 1173 @echo ' modules - default target, build the module(s)' 1174 @echo ' modules_install - install the module' 1175 @echo ' clean - remove generated files in module directory only' 1176 @echo '' 1177endif # KBUILD_EXTMOD 1178 1179# Generate tags for editors 1180# --------------------------------------------------------------------------- 1181 1182#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1183#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1184#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1185 1186ifeq ($(src),$(obj)) 1187__srctree = 1188else 1189__srctree = $(srctree)/ 1190endif 1191 1192ALLSOURCE_ARCHS := $(ARCH) 1193 1194define all-sources 1195 ( find $(__srctree) $(RCS_FIND_IGNORE) \ 1196 \( -name include -o -name arch \) -prune -o \ 1197 -name '*.[chS]' -print; \ 1198 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1199 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ 1200 -name '*.[chS]' -print; \ 1201 done ; \ 1202 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1203 -name '*.[chS]' -print; \ 1204 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1205 \( -name config -o -name 'asm-*' \) -prune \ 1206 -o -name '*.[chS]' -print; \ 1207 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1208 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ 1209 -name '*.[chS]' -print; \ 1210 done ; \ 1211 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1212 -name '*.[chS]' -print ) 1213endef 1214 1215quiet_cmd_cscope-file = FILELST cscope.files 1216 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1217 1218quiet_cmd_cscope = MAKE cscope.out 1219 cmd_cscope = cscope -b 1220 1221cscope: FORCE 1222 $(call cmd,cscope-file) 1223 $(call cmd,cscope) 1224 1225quiet_cmd_TAGS = MAKE $@ 1226define cmd_TAGS 1227 rm -f $@; \ 1228 ETAGSF=`etags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \ 1229 $(all-sources) | xargs etags $$ETAGSF -a 1230endef 1231 1232TAGS: FORCE 1233 $(call cmd,TAGS) 1234 1235 1236quiet_cmd_tags = MAKE $@ 1237define cmd_tags 1238 rm -f $@; \ 1239 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \ 1240 $(all-sources) | xargs ctags $$CTAGSF -a 1241endef 1242 1243tags: FORCE 1244 $(call cmd,tags) 1245 1246 1247# Scripts to check various things for consistency 1248# --------------------------------------------------------------------------- 1249 1250configcheck: 1251 find * $(RCS_FIND_IGNORE) \ 1252 -name '*.[hcS]' -type f -print | sort \ 1253 | xargs $(PERL) -w scripts/checkconfig.pl 1254 1255includecheck: 1256 find * $(RCS_FIND_IGNORE) \ 1257 -name '*.[hcS]' -type f -print | sort \ 1258 | xargs $(PERL) -w scripts/checkincludes.pl 1259 1260versioncheck: 1261 find * $(RCS_FIND_IGNORE) \ 1262 -name '*.[hcS]' -type f -print | sort \ 1263 | xargs $(PERL) -w scripts/checkversion.pl 1264 1265buildcheck: 1266 $(PERL) $(srctree)/scripts/reference_discarded.pl 1267 $(PERL) $(srctree)/scripts/reference_init.pl 1268 1269namespacecheck: 1270 $(PERL) $(srctree)/scripts/namespace.pl 1271 1272endif #ifeq ($(config-targets),1) 1273endif #ifeq ($(mixed-targets),1) 1274 1275.PHONY: checkstack 1276checkstack: 1277 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1278 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1279 1280kernelrelease: 1281 @echo $(KERNELRELEASE) 1282 1283# FIXME Should go into a make.lib or something 1284# =========================================================================== 1285 1286quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1287 cmd_rmdirs = rm -rf $(rm-dirs) 1288 1289quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1290 cmd_rmfiles = rm -f $(rm-files) 1291 1292 1293a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1294 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1295 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) 1296 1297quiet_cmd_as_o_S = AS $@ 1298cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1299 1300# read all saved command lines 1301 1302targets := $(wildcard $(sort $(targets))) 1303cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1304 1305ifneq ($(cmd_files),) 1306 $(cmd_files): ; # Do not try to update included dependency files 1307 include $(cmd_files) 1308endif 1309 1310# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1311# Usage: 1312# $(Q)$(MAKE) $(clean)=dir 1313clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1314 1315endif # skip-makefile 1316 1317FORCE: 1318