1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 12 4EXTRAVERSION = 5NAME=Woozy Numbat 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) KBUILD_VERBOSE=$(KBUILD_VERBOSE) \ 114 KBUILD_CHECK=$(KBUILD_CHECK) KBUILD_EXTMOD="$(KBUILD_EXTMOD)" \ 115 -f $(CURDIR)/Makefile $@ 116 117# Leave processing to above invocation of make 118skip-makefile := 1 119endif # ifneq ($(KBUILD_OUTPUT),) 120endif # ifeq ($(KBUILD_SRC),) 121 122# We process the rest of the Makefile if this is the final invocation of make 123ifeq ($(skip-makefile),) 124 125# If building an external module we do not care about the all: rule 126# but instead _all depend on modules 127.PHONY: all 128ifeq ($(KBUILD_EXTMOD),) 129_all: all 130else 131_all: modules 132endif 133 134srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 135TOPDIR := $(srctree) 136# FIXME - TOPDIR is obsolete, use srctree/objtree 137objtree := $(CURDIR) 138src := $(srctree) 139obj := $(objtree) 140 141VPATH := $(srctree) 142 143export srctree objtree VPATH TOPDIR 144 145nullstring := 146space := $(nullstring) # end of line 147 148# Take the contents of any files called localversion* and the config 149# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be 150# careful not to include files twice if building in the source 151# directory. LOCALVERSION from the command line override all of this 152 153localver := $(objtree)/localversion* $(srctree)/localversion* 154localver := $(sort $(wildcard $(localver))) 155# skip backup files (containing '~') 156localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f))) 157 158LOCALVERSION = $(subst $(space),, \ 159 $(shell cat /dev/null $(localver)) \ 160 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 161 162KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION) 163 164# SUBARCH tells the usermode build what the underlying arch is. That is set 165# first, and if a usermode build is happening, the "ARCH=um" on the command 166# line overrides the setting of ARCH below. If a native build is happening, 167# then ARCH is assigned, getting whatever value it gets normally, and 168# SUBARCH is subsequently ignored. 169 170SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 171 -e s/arm.*/arm/ -e s/sa110/arm/ \ 172 -e s/s390x/s390/ -e s/parisc64/parisc/ ) 173 174# Cross compiling and selecting different set of gcc/bin-utils 175# --------------------------------------------------------------------------- 176# 177# When performing cross compilation for other architectures ARCH shall be set 178# to the target architecture. (See arch/* for the possibilities). 179# ARCH can be set during invocation of make: 180# make ARCH=ia64 181# Another way is to have ARCH set in the environment. 182# The default ARCH is the host where make is executed. 183 184# CROSS_COMPILE specify the prefix used for all executables used 185# during compilation. Only gcc and related bin-utils executables 186# are prefixed with $(CROSS_COMPILE). 187# CROSS_COMPILE can be set on the command line 188# make CROSS_COMPILE=ia64-linux- 189# Alternatively CROSS_COMPILE can be set in the environment. 190# Default value for CROSS_COMPILE is not to prefix executables 191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 192 193ARCH ?= $(SUBARCH) 194CROSS_COMPILE ?= 195 196# Architecture as present in compile.h 197UTS_MACHINE := $(ARCH) 198 199# SHELL used by kbuild 200CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 201 else if [ -x /bin/bash ]; then echo /bin/bash; \ 202 else echo sh; fi ; fi) 203 204HOSTCC = gcc 205HOSTCXX = g++ 206HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 207HOSTCXXFLAGS = -O2 208 209# Decide whether to build built-in, modular, or both. 210# Normally, just do built-in. 211 212KBUILD_MODULES := 213KBUILD_BUILTIN := 1 214 215# If we have only "make modules", don't compile built-in objects. 216# When we're building modules with modversions, we need to consider 217# the built-in objects during the descend as well, in order to 218# make sure the checksums are uptodate before we record them. 219 220ifeq ($(MAKECMDGOALS),modules) 221 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 222endif 223 224# If we have "make <whatever> modules", compile modules 225# in addition to whatever we do anyway. 226# Just "make" or "make all" shall build modules as well 227 228ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 229 KBUILD_MODULES := 1 230endif 231 232ifeq ($(MAKECMDGOALS),) 233 KBUILD_MODULES := 1 234endif 235 236export KBUILD_MODULES KBUILD_BUILTIN KBUILD_VERBOSE 237export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 238 239# Beautify output 240# --------------------------------------------------------------------------- 241# 242# Normally, we echo the whole command before executing it. By making 243# that echo $($(quiet)$(cmd)), we now have the possibility to set 244# $(quiet) to choose other forms of output instead, e.g. 245# 246# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 247# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 248# 249# If $(quiet) is empty, the whole command will be printed. 250# If it is set to "quiet_", only the short version will be printed. 251# If it is set to "silent_", nothing wil be printed at all, since 252# the variable $(silent_cmd_cc_o_c) doesn't exist. 253# 254# A simple variant is to prefix commands with $(Q) - that's usefull 255# for commands that shall be hidden in non-verbose mode. 256# 257# $(Q)ln $@ :< 258# 259# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 260# If KBUILD_VERBOSE equals 1 then the above command is displayed. 261 262ifeq ($(KBUILD_VERBOSE),1) 263 quiet = 264 Q = 265else 266 quiet=quiet_ 267 Q = @ 268endif 269 270# If the user is running make -s (silent mode), suppress echoing of 271# commands 272 273ifneq ($(findstring s,$(MAKEFLAGS)),) 274 quiet=silent_ 275endif 276 277export quiet Q KBUILD_VERBOSE 278 279###### 280# cc support functions to be used (only) in arch/$(ARCH)/Makefile 281# See documentation in Documentation/kbuild/makefiles.txt 282 283# cc-option 284# Usage: cflags-y += $(call gcc-option, -march=winchip-c6, -march=i586) 285 286cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 287 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) 288 289# For backward compatibility 290check_gcc = $(warning check_gcc is deprecated - use cc-option) \ 291 $(call cc-option, $(1),$(2)) 292 293# cc-option-yn 294# Usage: flag := $(call cc-option-yn, -march=winchip-c6) 295cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 296 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) 297 298# cc-option-align 299# Prefix align with either -falign or -malign 300cc-option-align = $(subst -functions=0,,\ 301 $(call cc-option,-falign-functions=0,-malign-functions=0)) 302 303# cc-version 304# Usage gcc-ver := $(call cc-version $(CC)) 305cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \ 306 $(if $(1), $(1), $(CC))) 307 308 309# Look for make include files relative to root of kernel src 310MAKEFLAGS += --include-dir=$(srctree) 311 312# For maximum performance (+ possibly random breakage, uncomment 313# the following) 314 315#MAKEFLAGS += -rR 316 317# Make variables (CC, etc...) 318 319AS = $(CROSS_COMPILE)as 320LD = $(CROSS_COMPILE)ld 321CC = $(CROSS_COMPILE)gcc 322CPP = $(CC) -E 323AR = $(CROSS_COMPILE)ar 324NM = $(CROSS_COMPILE)nm 325STRIP = $(CROSS_COMPILE)strip 326OBJCOPY = $(CROSS_COMPILE)objcopy 327OBJDUMP = $(CROSS_COMPILE)objdump 328AWK = awk 329GENKSYMS = scripts/genksyms/genksyms 330DEPMOD = /sbin/depmod 331KALLSYMS = scripts/kallsyms 332PERL = perl 333CHECK = sparse 334 335CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ 336MODFLAGS = -DMODULE 337CFLAGS_MODULE = $(MODFLAGS) 338AFLAGS_MODULE = $(MODFLAGS) 339LDFLAGS_MODULE = -r 340CFLAGS_KERNEL = 341AFLAGS_KERNEL = 342 343 344# Use LINUXINCLUDE when you must reference the include/ directory. 345# Needed to be compatible with the O= option 346LINUXINCLUDE := -Iinclude \ 347 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) 348 349CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 350 351CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \ 352 -fno-strict-aliasing -fno-common \ 353 -ffreestanding 354AFLAGS := -D__ASSEMBLY__ 355 356export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \ 357 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ 358 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ 359 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 360 361export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 362export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 363export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 364 365# When compiling out-of-tree modules, put MODVERDIR in the module 366# tree rather than in the kernel tree. The kernel tree might 367# even be read-only. 368export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 369 370# The temporary file to save gcc -MD generated dependencies must not 371# contain a comma 372comma := , 373depfile = $(subst $(comma),_,$(@D)/.$(@F).d) 374 375# Files to ignore in find ... statements 376 377RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o 378RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc 379 380# =========================================================================== 381# Rules shared between *config targets and build targets 382 383# Basic helpers built in scripts/ 384.PHONY: scripts_basic 385scripts_basic: 386 $(Q)$(MAKE) $(build)=scripts/basic 387 388.PHONY: outputmakefile 389# outputmakefile generate a Makefile to be placed in output directory, if 390# using a seperate output directory. This allows convinient use 391# of make in output directory 392outputmakefile: 393 $(Q)if test ! $(srctree) -ef $(objtree); then \ 394 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 395 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ 396 > $(objtree)/Makefile; \ 397 echo ' GEN $(objtree)/Makefile'; \ 398 fi 399 400# To make sure we do not include .config for any of the *config targets 401# catch them early, and hand them over to scripts/kconfig/Makefile 402# It is allowed to specify more targets when calling make, including 403# mixing *config targets and build targets. 404# For example 'make oldconfig all'. 405# Detect when mixed targets is specified, and make a second invocation 406# of make so .config is not included in this case either (for *config). 407 408no-dot-config-targets := clean mrproper distclean \ 409 cscope TAGS tags help %docs check% 410 411config-targets := 0 412mixed-targets := 0 413dot-config := 1 414 415ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 416 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 417 dot-config := 0 418 endif 419endif 420 421ifeq ($(KBUILD_EXTMOD),) 422 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 423 config-targets := 1 424 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 425 mixed-targets := 1 426 endif 427 endif 428endif 429 430ifeq ($(mixed-targets),1) 431# =========================================================================== 432# We're called with mixed targets (*config and build targets). 433# Handle them one by one. 434 435%:: FORCE 436 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 437 438else 439ifeq ($(config-targets),1) 440# =========================================================================== 441# *config targets only - make sure prerequisites are updated, and descend 442# in scripts/kconfig to make the *config target 443 444# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 445# KBUILD_DEFCONFIG may point out an alternative default configuration 446# used for 'make defconfig' 447include $(srctree)/arch/$(ARCH)/Makefile 448export KBUILD_DEFCONFIG 449 450config: scripts_basic outputmakefile FORCE 451 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 452%config: scripts_basic outputmakefile FORCE 453 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 454 455else 456# =========================================================================== 457# Build targets only - this includes vmlinux, arch specific targets, clean 458# targets and others. In general all targets except *config targets. 459 460ifeq ($(KBUILD_EXTMOD),) 461# Additional helpers built in scripts/ 462# Carefully list dependencies so we do not try to build scripts twice 463# in parrallel 464.PHONY: scripts 465scripts: scripts_basic include/config/MARKER 466 $(Q)$(MAKE) $(build)=$(@) 467 468scripts_basic: include/linux/autoconf.h 469 470# Objects we will link into vmlinux / subdirs we need to visit 471init-y := init/ 472drivers-y := drivers/ sound/ 473net-y := net/ 474libs-y := lib/ 475core-y := usr/ 476endif # KBUILD_EXTMOD 477 478ifeq ($(dot-config),1) 479# In this section, we need .config 480 481# Read in dependencies to all Kconfig* files, make sure to run 482# oldconfig if changes are detected. 483-include .config.cmd 484 485include .config 486 487# If .config needs to be updated, it will be done via the dependency 488# that autoconf has on .config. 489# To avoid any implicit rule to kick in, define an empty command 490.config: ; 491 492# If .config is newer than include/linux/autoconf.h, someone tinkered 493# with it and forgot to run make oldconfig 494include/linux/autoconf.h: .config 495 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 496else 497# Dummy target needed, because used as prerequisite 498include/linux/autoconf.h: ; 499endif 500 501# The all: target is the default when no target is given on the 502# command line. 503# This allow a user to issue only 'make' to build a kernel including modules 504# Defaults vmlinux but it is usually overriden in the arch makefile 505all: vmlinux 506 507ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 508CFLAGS += -Os 509else 510CFLAGS += -O2 511endif 512 513#Add align options if CONFIG_CC_* is not equal to 0 514add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1))) 515CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions) 516CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels) 517CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops) 518CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps) 519 520ifdef CONFIG_FRAME_POINTER 521CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) 522else 523CFLAGS += -fomit-frame-pointer 524endif 525 526ifdef CONFIG_DEBUG_INFO 527CFLAGS += -g 528endif 529 530include $(srctree)/arch/$(ARCH)/Makefile 531 532# arch Makefile may override CC so keep this after arch Makefile is included 533NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 534CHECKFLAGS += $(NOSTDINC_FLAGS) 535 536# warn about C99 declaration after statement 537CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 538 539# disable pointer signedness warnings in gcc 4.0 540CFLAGS += $(call cc-option,-Wno-pointer-sign,) 541 542# Default kernel image to build when no specific target is given. 543# KBUILD_IMAGE may be overruled on the commandline or 544# set in the environment 545# Also any assignments in arch/$(ARCH)/Makefile take precedence over 546# this default value 547export KBUILD_IMAGE ?= vmlinux 548 549# 550# INSTALL_PATH specifies where to place the updated kernel and system map 551# images. Default is /boot, but you can set it to other values 552export INSTALL_PATH ?= /boot 553 554# 555# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 556# relocations required by build roots. This is not defined in the 557# makefile but the arguement can be passed to make if needed. 558# 559 560MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 561export MODLIB 562 563 564ifeq ($(KBUILD_EXTMOD),) 565core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ 566 567vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 568 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 569 $(net-y) $(net-m) $(libs-y) $(libs-m))) 570 571vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 572 $(init-n) $(init-) \ 573 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 574 $(net-n) $(net-) $(libs-n) $(libs-)))) 575 576init-y := $(patsubst %/, %/built-in.o, $(init-y)) 577core-y := $(patsubst %/, %/built-in.o, $(core-y)) 578drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 579net-y := $(patsubst %/, %/built-in.o, $(net-y)) 580libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 581libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 582libs-y := $(libs-y1) $(libs-y2) 583 584# Build vmlinux 585# --------------------------------------------------------------------------- 586# vmlinux is build from the objects selected by $(vmlinux-init) and 587# $(vmlinux-main). Most are built-in.o files from top-level directories 588# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 589# Ordering when linking is important, and $(vmlinux-init) must be first. 590# 591# vmlinux 592# ^ 593# | 594# +-< $(vmlinux-init) 595# | +--< init/version.o + more 596# | 597# +--< $(vmlinux-main) 598# | +--< driver/built-in.o mm/built-in.o + more 599# | 600# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 601# 602# vmlinux version (uname -v) cannot be updated during normal 603# descending-into-subdirs phase since we do not yet know if we need to 604# update vmlinux. 605# Therefore this step is delayed until just before final link of vmlinux - 606# except in the kallsyms case where it is done just before adding the 607# symbols to the kernel. 608# 609# System.map is generated to document addresses of all kernel symbols 610 611vmlinux-init := $(head-y) $(init-y) 612vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 613vmlinux-all := $(vmlinux-init) $(vmlinux-main) 614vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 615 616# Rule to link vmlinux - also used during CONFIG_KALLSYMS 617# May be overridden by arch/$(ARCH)/Makefile 618quiet_cmd_vmlinux__ ?= LD $@ 619 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 620 -T $(vmlinux-lds) $(vmlinux-init) \ 621 --start-group $(vmlinux-main) --end-group \ 622 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 623 624# Generate new vmlinux version 625quiet_cmd_vmlinux_version = GEN .version 626 cmd_vmlinux_version = set -e; \ 627 . $(srctree)/scripts/mkversion > .tmp_version; \ 628 mv -f .tmp_version .version; \ 629 $(MAKE) $(build)=init 630 631# Generate System.map 632quiet_cmd_sysmap = SYSMAP 633 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 634 635# Link of vmlinux 636# If CONFIG_KALLSYMS is set .version is already updated 637# Generate System.map and verify that the content is consistent 638 639define rule_vmlinux__ 640 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 641 642 $(call cmd,vmlinux__) 643 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 644 645 $(Q)$(if $($(quiet)cmd_sysmap), \ 646 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 647 $(cmd_sysmap) $@ System.map; \ 648 if [ $$? -ne 0 ]; then \ 649 rm -f $@; \ 650 /bin/false; \ 651 fi; 652 $(verify_kallsyms) 653endef 654 655 656ifdef CONFIG_KALLSYMS 657# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 658# It's a three stage process: 659# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 660# empty 661# Running kallsyms on that gives us .tmp_kallsyms1.o with 662# the right size - vmlinux version (uname -v) is updated during this step 663# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 664# but due to the added section, some addresses have shifted. 665# From here, we generate a correct .tmp_kallsyms2.o 666# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 667# o Verify that the System.map from vmlinux matches the map from 668# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 669# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 670# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 671# temporary bypass to allow the kernel to be built while the 672# maintainers work out what went wrong with kallsyms. 673 674ifdef CONFIG_KALLSYMS_EXTRA_PASS 675last_kallsyms := 3 676else 677last_kallsyms := 2 678endif 679 680kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 681 682define verify_kallsyms 683 $(Q)$(if $($(quiet)cmd_sysmap), \ 684 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 685 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 686 $(Q)cmp -s System.map .tmp_System.map || \ 687 (echo Inconsistent kallsyms data; \ 688 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 689 rm .tmp_kallsyms* ; /bin/false ) 690endef 691 692# Update vmlinux version before link 693# Use + in front of this rule to silent warning about make -j1 694cmd_ksym_ld = $(cmd_vmlinux__) 695define rule_ksym_ld 696 +$(call cmd,vmlinux_version) 697 $(call cmd,vmlinux__) 698 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 699endef 700 701# Generate .S file with all kernel symbols 702quiet_cmd_kallsyms = KSYM $@ 703 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 704 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 705 706.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 707 $(call if_changed_dep,as_o_S) 708 709.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 710 $(call cmd,kallsyms) 711 712# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 713.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 714 $(call if_changed_rule,ksym_ld) 715 716.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 717 $(call if_changed,vmlinux__) 718 719.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 720 $(call if_changed,vmlinux__) 721 722# Needs to visit scripts/ before $(KALLSYMS) can be used. 723$(KALLSYMS): scripts ; 724 725endif # ifdef CONFIG_KALLSYMS 726 727# vmlinux image - including updated kernel symbols 728vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 729 $(call if_changed_rule,vmlinux__) 730 731# The actual objects are generated when descending, 732# make sure no implicit rule kicks in 733$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 734 735# Handle descending into subdirectories listed in $(vmlinux-dirs) 736# Preset locale variables to speed up the build process. Limit locale 737# tweaks to this spot to avoid wrong language settings when running 738# make menuconfig etc. 739# Error messages still appears in the original language 740 741.PHONY: $(vmlinux-dirs) 742$(vmlinux-dirs): prepare-all scripts 743 $(Q)$(MAKE) $(build)=$@ 744 745# Things we need to do before we recursively start building the kernel 746# or the modules are listed in "prepare-all". 747# A multi level approach is used. prepare1 is updated first, then prepare0. 748# prepare-all is the collection point for the prepare targets. 749 750.PHONY: prepare-all prepare prepare0 prepare1 prepare2 751 752# prepare2 is used to check if we are building in a separate output directory, 753# and if so do: 754# 1) Check that make has not been executed in the kernel src $(srctree) 755# 2) Create the include2 directory, used for the second asm symlink 756 757prepare2: 758ifneq ($(KBUILD_SRC),) 759 @echo ' Using $(srctree) as source for kernel' 760 $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \ 761 echo " $(srctree) is not clean, please run 'make mrproper'";\ 762 echo " in the '$(srctree)' directory.";\ 763 /bin/false; \ 764 fi; 765 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 766 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 767endif 768 769# prepare1 creates a makefile if using a separate output directory 770prepare1: prepare2 outputmakefile 771 772prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER 773ifneq ($(KBUILD_MODULES),) 774 $(Q)rm -rf $(MODVERDIR) 775 $(Q)mkdir -p $(MODVERDIR) 776endif 777 778# All the preparing.. 779prepare-all: prepare0 prepare 780 781# Leave this as default for preprocessing vmlinux.lds.S, which is now 782# done in arch/$(ARCH)/kernel/Makefile 783 784export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 785 786# Single targets 787# --------------------------------------------------------------------------- 788 789%.s: %.c scripts FORCE 790 $(Q)$(MAKE) $(build)=$(@D) $@ 791%.i: %.c scripts FORCE 792 $(Q)$(MAKE) $(build)=$(@D) $@ 793%.o: %.c scripts FORCE 794 $(Q)$(MAKE) $(build)=$(@D) $@ 795%/: scripts prepare FORCE 796 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) 797%.lst: %.c scripts FORCE 798 $(Q)$(MAKE) $(build)=$(@D) $@ 799%.s: %.S scripts FORCE 800 $(Q)$(MAKE) $(build)=$(@D) $@ 801%.o: %.S scripts FORCE 802 $(Q)$(MAKE) $(build)=$(@D) $@ 803 804# FIXME: The asm symlink changes when $(ARCH) changes. That's 805# hard to detect, but I suppose "make mrproper" is a good idea 806# before switching between archs anyway. 807 808include/asm: 809 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 810 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 811 @ln -fsn asm-$(ARCH) $@ 812 813# Split autoconf.h into include/linux/config/* 814 815include/config/MARKER: include/linux/autoconf.h 816 @echo ' SPLIT include/linux/autoconf.h -> include/config/*' 817 @scripts/basic/split-include include/linux/autoconf.h include/config 818 @touch $@ 819 820# Generate some files 821# --------------------------------------------------------------------------- 822 823# KERNELRELEASE can change from a few different places, meaning version.h 824# needs to be updated, so this check is forced on all builds 825 826uts_len := 64 827 828define filechk_version.h 829 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 830 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 831 exit 1; \ 832 fi; \ 833 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ 834 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ 835 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ 836 ) 837endef 838 839include/linux/version.h: $(srctree)/Makefile FORCE 840 $(call filechk,version.h) 841 842# --------------------------------------------------------------------------- 843 844.PHONY: depend dep 845depend dep: 846 @echo '*** Warning: make $@ is unnecessary now.' 847 848# --------------------------------------------------------------------------- 849# Modules 850 851ifdef CONFIG_MODULES 852 853# By default, build modules as well 854 855all: modules 856 857# Build modules 858 859.PHONY: modules 860modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 861 @echo ' Building modules, stage 2.'; 862 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 863 864 865# Target to prepare building external modules 866.PHONY: modules_prepare 867modules_prepare: prepare-all scripts 868 869# Target to install modules 870.PHONY: modules_install 871modules_install: _modinst_ _modinst_post 872 873.PHONY: _modinst_ 874_modinst_: 875 @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \ 876 echo "Warning: you may need to install module-init-tools"; \ 877 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 878 sleep 1; \ 879 fi 880 @rm -rf $(MODLIB)/kernel 881 @rm -f $(MODLIB)/source 882 @mkdir -p $(MODLIB)/kernel 883 @ln -s $(srctree) $(MODLIB)/source 884 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 885 rm -f $(MODLIB)/build ; \ 886 ln -s $(objtree) $(MODLIB)/build ; \ 887 fi 888 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 889 890# If System.map exists, run depmod. This deliberately does not have a 891# dependency on System.map since that would run the dependency tree on 892# vmlinux. This depmod is only for convenience to give the initial 893# boot a modules.dep even before / is mounted read-write. However the 894# boot script depmod is the master version. 895ifeq "$(strip $(INSTALL_MOD_PATH))" "" 896depmod_opts := 897else 898depmod_opts := -b $(INSTALL_MOD_PATH) -r 899endif 900.PHONY: _modinst_post 901_modinst_post: _modinst_ 902 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 903 904else # CONFIG_MODULES 905 906# Modules not configured 907# --------------------------------------------------------------------------- 908 909modules modules_install: FORCE 910 @echo 911 @echo "The present kernel configuration has modules disabled." 912 @echo "Type 'make config' and enable loadable module support." 913 @echo "Then build a kernel with module support enabled." 914 @echo 915 @exit 1 916 917endif # CONFIG_MODULES 918 919# Generate asm-offsets.h 920# --------------------------------------------------------------------------- 921 922define filechk_gen-asm-offsets 923 (set -e; \ 924 echo "#ifndef __ASM_OFFSETS_H__"; \ 925 echo "#define __ASM_OFFSETS_H__"; \ 926 echo "/*"; \ 927 echo " * DO NOT MODIFY."; \ 928 echo " *"; \ 929 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 930 echo " *"; \ 931 echo " */"; \ 932 echo ""; \ 933 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 934 echo ""; \ 935 echo "#endif" ) 936endef 937 938 939### 940# Cleaning is done on three levels. 941# make clean Delete most generated files 942# Leave enough to build external modules 943# make mrproper Delete the current configuration, and all generated files 944# make distclean Remove editor backup files, patch leftover files and the like 945 946# Directories & files removed with 'make clean' 947CLEAN_DIRS += $(MODVERDIR) 948CLEAN_FILES += vmlinux System.map \ 949 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 950 951# Directories & files removed with 'make mrproper' 952MRPROPER_DIRS += include/config include2 953MRPROPER_FILES += .config .config.old include/asm .version \ 954 include/linux/autoconf.h include/linux/version.h \ 955 Module.symvers tags TAGS cscope* 956 957# clean - Delete most, but leave enough to build external modules 958# 959clean: rm-dirs := $(CLEAN_DIRS) 960clean: rm-files := $(CLEAN_FILES) 961clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs)) 962 963.PHONY: $(clean-dirs) clean archclean 964$(clean-dirs): 965 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 966 967clean: archclean $(clean-dirs) 968 $(call cmd,rmdirs) 969 $(call cmd,rmfiles) 970 @find . $(RCS_FIND_IGNORE) \ 971 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 972 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 973 -type f -print | xargs rm -f 974 975# mrproper - Delete all generated files, including .config 976# 977mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 978mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 979mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 980 981.PHONY: $(mrproper-dirs) mrproper archmrproper 982$(mrproper-dirs): 983 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 984 985mrproper: clean archmrproper $(mrproper-dirs) 986 $(call cmd,rmdirs) 987 $(call cmd,rmfiles) 988 989# distclean 990# 991.PHONY: distclean 992 993distclean: mrproper 994 @find $(srctree) $(RCS_FIND_IGNORE) \ 995 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 996 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 997 -o -name '.*.rej' -o -size 0 \ 998 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 999 -type f -print | xargs rm -f 1000 1001 1002# Packaging of the kernel to various formats 1003# --------------------------------------------------------------------------- 1004# rpm target kept for backward compatibility 1005package-dir := $(srctree)/scripts/package 1006 1007.PHONY: %-pkg rpm 1008 1009%pkg: FORCE 1010 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 1011rpm: FORCE 1012 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 1013 1014 1015# Brief documentation of the typical targets used 1016# --------------------------------------------------------------------------- 1017 1018boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1019boards := $(notdir $(boards)) 1020 1021help: 1022 @echo 'Cleaning targets:' 1023 @echo ' clean - remove most generated files but keep the config' 1024 @echo ' mrproper - remove all generated files + config + various backup files' 1025 @echo '' 1026 @echo 'Configuration targets:' 1027 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1028 @echo '' 1029 @echo 'Other generic targets:' 1030 @echo ' all - Build all targets marked with [*]' 1031 @echo '* vmlinux - Build the bare kernel' 1032 @echo '* modules - Build all modules' 1033 @echo ' modules_install - Install all modules' 1034 @echo ' dir/ - Build all files in dir and below' 1035 @echo ' dir/file.[ois] - Build specified target only' 1036 @echo ' rpm - Build a kernel as an RPM package' 1037 @echo ' tags/TAGS - Generate tags file for editors' 1038 @echo ' cscope - Generate cscope index' 1039 @echo '' 1040 @echo 'Static analysers' 1041 @echo ' buildcheck - List dangling references to vmlinux discarded sections' 1042 @echo ' and init sections from non-init sections' 1043 @echo ' checkstack - Generate a list of stack hogs' 1044 @echo ' namespacecheck - Name space analysis on compiled kernel' 1045 @echo '' 1046 @echo 'Kernel packaging:' 1047 @$(MAKE) -f $(package-dir)/Makefile help 1048 @echo '' 1049 @echo 'Documentation targets:' 1050 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1051 @echo '' 1052 @echo 'Architecture specific targets ($(ARCH)):' 1053 @$(if $(archhelp),$(archhelp),\ 1054 echo ' No architecture specific help defined for $(ARCH)') 1055 @echo '' 1056 @$(if $(boards), \ 1057 $(foreach b, $(boards), \ 1058 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1059 echo '') 1060 1061 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1062 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1063 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' 1064 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' 1065 @echo '' 1066 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1067 @echo 'For further info see the ./README file' 1068 1069 1070# Documentation targets 1071# --------------------------------------------------------------------------- 1072%docs: scripts_basic FORCE 1073 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1074 1075else # KBUILD_EXTMOD 1076 1077### 1078# External module support. 1079# When building external modules the kernel used as basis is considered 1080# read-only, and no consistency checks are made and the make 1081# system is not used on the basis kernel. If updates are required 1082# in the basis kernel ordinary make commands (without M=...) must 1083# be used. 1084# 1085# The following are the only valid targets when building external 1086# modules. 1087# make M=dir clean Delete all automatically generated files 1088# make M=dir modules Make all modules in specified dir 1089# make M=dir Same as 'make M=dir modules' 1090# make M=dir modules_install 1091# Install the modules build in the module directory 1092# Assumes install directory is already created 1093 1094# We are always building modules 1095KBUILD_MODULES := 1 1096.PHONY: crmodverdir 1097crmodverdir: 1098 $(Q)mkdir -p $(MODVERDIR) 1099 1100.PHONY: $(objtree)/Module.symvers 1101$(objtree)/Module.symvers: 1102 @test -e $(objtree)/Module.symvers || ( \ 1103 echo; \ 1104 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1105 echo " is missing; modules will have no dependencies and modversions."; \ 1106 echo ) 1107 1108module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1109.PHONY: $(module-dirs) modules 1110$(module-dirs): crmodverdir $(objtree)/Module.symvers 1111 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1112 1113modules: $(module-dirs) 1114 @echo ' Building modules, stage 2.'; 1115 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1116 1117.PHONY: modules_install 1118modules_install: 1119 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1120 1121clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1122 1123.PHONY: $(clean-dirs) clean 1124$(clean-dirs): 1125 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1126 1127clean: rm-dirs := $(MODVERDIR) 1128clean: $(clean-dirs) 1129 $(call cmd,rmdirs) 1130 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1131 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1132 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1133 -type f -print | xargs rm -f 1134 1135help: 1136 @echo ' Building external modules.' 1137 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1138 @echo '' 1139 @echo ' modules - default target, build the module(s)' 1140 @echo ' modules_install - install the module' 1141 @echo ' clean - remove generated files in module directory only' 1142 @echo '' 1143endif # KBUILD_EXTMOD 1144 1145# Generate tags for editors 1146# --------------------------------------------------------------------------- 1147 1148#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1149#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1150#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1151 1152ifeq ($(KBUILD_OUTPUT),) 1153__srctree = 1154else 1155__srctree = $(srctree)/ 1156endif 1157 1158define all-sources 1159 ( find $(__srctree) $(RCS_FIND_IGNORE) \ 1160 \( -name include -o -name arch \) -prune -o \ 1161 -name '*.[chS]' -print; \ 1162 find $(__srctree)arch/$(ARCH) $(RCS_FIND_IGNORE) \ 1163 -name '*.[chS]' -print; \ 1164 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1165 -name '*.[chS]' -print; \ 1166 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1167 \( -name config -o -name 'asm-*' \) -prune \ 1168 -o -name '*.[chS]' -print; \ 1169 find $(__srctree)include/asm-$(ARCH) $(RCS_FIND_IGNORE) \ 1170 -name '*.[chS]' -print; \ 1171 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1172 -name '*.[chS]' -print ) 1173endef 1174 1175quiet_cmd_cscope-file = FILELST cscope.files 1176 cmd_cscope-file = $(all-sources) > cscope.files 1177 1178quiet_cmd_cscope = MAKE cscope.out 1179 cmd_cscope = cscope -k -b -q 1180 1181cscope: FORCE 1182 $(call cmd,cscope-file) 1183 $(call cmd,cscope) 1184 1185quiet_cmd_TAGS = MAKE $@ 1186cmd_TAGS = $(all-sources) | etags - 1187 1188# Exuberant ctags works better with -I 1189 1190quiet_cmd_tags = MAKE $@ 1191define cmd_tags 1192 rm -f $@; \ 1193 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \ 1194 $(all-sources) | xargs ctags $$CTAGSF -a 1195endef 1196 1197TAGS: FORCE 1198 $(call cmd,TAGS) 1199 1200tags: FORCE 1201 $(call cmd,tags) 1202 1203 1204# Scripts to check various things for consistency 1205# --------------------------------------------------------------------------- 1206 1207configcheck: 1208 find * $(RCS_FIND_IGNORE) \ 1209 -name '*.[hcS]' -type f -print | sort \ 1210 | xargs $(PERL) -w scripts/checkconfig.pl 1211 1212includecheck: 1213 find * $(RCS_FIND_IGNORE) \ 1214 -name '*.[hcS]' -type f -print | sort \ 1215 | xargs $(PERL) -w scripts/checkincludes.pl 1216 1217versioncheck: 1218 find * $(RCS_FIND_IGNORE) \ 1219 -name '*.[hcS]' -type f -print | sort \ 1220 | xargs $(PERL) -w scripts/checkversion.pl 1221 1222buildcheck: 1223 $(PERL) $(srctree)/scripts/reference_discarded.pl 1224 $(PERL) $(srctree)/scripts/reference_init.pl 1225 1226namespacecheck: 1227 $(PERL) $(srctree)/scripts/namespace.pl 1228 1229endif #ifeq ($(config-targets),1) 1230endif #ifeq ($(mixed-targets),1) 1231 1232.PHONY: checkstack 1233checkstack: 1234 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1235 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1236 1237kernelrelease: 1238 @echo $(KERNELRELEASE) 1239 1240# FIXME Should go into a make.lib or something 1241# =========================================================================== 1242 1243quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1244 cmd_rmdirs = rm -rf $(rm-dirs) 1245 1246quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1247 cmd_rmfiles = rm -f $(rm-files) 1248 1249 1250a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1251 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1252 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) 1253 1254quiet_cmd_as_o_S = AS $@ 1255cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1256 1257# read all saved command lines 1258 1259targets := $(wildcard $(sort $(targets))) 1260cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1261 1262ifneq ($(cmd_files),) 1263 $(cmd_files): ; # Do not try to update included dependency files 1264 include $(cmd_files) 1265endif 1266 1267# Execute command and generate cmd file 1268if_changed = $(if $(strip $? \ 1269 $(filter-out $(cmd_$(1)),$(cmd_$@))\ 1270 $(filter-out $(cmd_$@),$(cmd_$(1)))),\ 1271 @set -e; \ 1272 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ 1273 $(cmd_$(1)); \ 1274 echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd) 1275 1276 1277# execute the command and also postprocess generated .d dependencies 1278# file 1279if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\ 1280 $(filter-out $(cmd_$(1)),$(cmd_$@))\ 1281 $(filter-out $(cmd_$@),$(cmd_$(1)))),\ 1282 $(Q)set -e; \ 1283 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ 1284 $(cmd_$(1)); \ 1285 scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \ 1286 rm -f $(depfile); \ 1287 mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd) 1288 1289# Usage: $(call if_changed_rule,foo) 1290# will check if $(cmd_foo) changed, or any of the prequisites changed, 1291# and if so will execute $(rule_foo) 1292 1293if_changed_rule = $(if $(strip $? \ 1294 $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\ 1295 $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\ 1296 $(Q)$(rule_$(1))) 1297 1298# If quiet is set, only print short version of command 1299 1300cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1)) 1301 1302# filechk is used to check if the content of a generated file is updated. 1303# Sample usage: 1304# define filechk_sample 1305# echo $KERNELRELEASE 1306# endef 1307# version.h : Makefile 1308# $(call filechk,sample) 1309# The rule defined shall write to stdout the content of the new file. 1310# The existing file will be compared with the new one. 1311# - If no file exist it is created 1312# - If the content differ the new file is used 1313# - If they are equal no change, and no timestamp update 1314 1315define filechk 1316 @set -e; \ 1317 echo ' CHK $@'; \ 1318 mkdir -p $(dir $@); \ 1319 $(filechk_$(1)) < $< > $@.tmp; \ 1320 if [ -r $@ ] && cmp -s $@ $@.tmp; then \ 1321 rm -f $@.tmp; \ 1322 else \ 1323 echo ' UPD $@'; \ 1324 mv -f $@.tmp $@; \ 1325 fi 1326endef 1327 1328# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir 1329# Usage: 1330# $(Q)$(MAKE) $(build)=dir 1331build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj 1332 1333# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1334# Usage: 1335# $(Q)$(MAKE) $(clean)=dir 1336clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1337 1338# $(call descend,<dir>,<target>) 1339# Recursively call a sub-make in <dir> with target <target> 1340# Usage is deprecated, because make does not see this as an invocation of make. 1341descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2) 1342 1343endif # skip-makefile 1344 1345FORCE: 1346