1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 11 4EXTRAVERSION = .5 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 of 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 := $(M) 65 endif 66endif 67 68 69# kbuild supports saving output files in a separate directory. 70# To locate output files in a separate directory two syntax'es are supported. 71# In both cases the working directory must be the root of the kernel src. 72# 1) O= 73# Use "make O=dir/to/store/output/files/" 74# 75# 2) Set KBUILD_OUTPUT 76# Set the environment variable KBUILD_OUTPUT to point to the directory 77# where the output files shall be placed. 78# export KBUILD_OUTPUT=dir/to/store/output/files/ 79# make 80# 81# The O= assigment takes precedence over the KBUILD_OUTPUT environment variable. 82 83 84# KBUILD_SRC is set on invocation of make in OBJ directory 85# KBUILD_SRC is not intended to be used by the regular user (for now) 86ifeq ($(KBUILD_SRC),) 87 88# OK, Make called in directory where kernel src resides 89# Do we want to locate output files in a separate directory? 90ifdef O 91 ifeq ("$(origin O)", "command line") 92 KBUILD_OUTPUT := $(O) 93 endif 94endif 95 96# That's our default target when none is given on the command line 97.PHONY: _all 98_all: 99 100ifneq ($(KBUILD_OUTPUT),) 101# Invoke a second make in the output directory, passing relevant variables 102# check that the output directory actually exists 103saved-output := $(KBUILD_OUTPUT) 104KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 105$(if $(KBUILD_OUTPUT),, \ 106 $(error output directory "$(saved-output)" does not exist)) 107 108.PHONY: $(MAKECMDGOALS) 109 110$(filter-out _all,$(MAKECMDGOALS)) _all: 111 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 112 KBUILD_SRC=$(CURDIR) KBUILD_VERBOSE=$(KBUILD_VERBOSE) \ 113 KBUILD_CHECK=$(KBUILD_CHECK) KBUILD_EXTMOD="$(KBUILD_EXTMOD)" \ 114 -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 KBUILD_VERBOSE 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 gcc-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# For maximum performance (+ possibly random breakage, uncomment 312# the following) 313 314#MAKEFLAGS += -rR 315 316# Make variables (CC, etc...) 317 318AS = $(CROSS_COMPILE)as 319LD = $(CROSS_COMPILE)ld 320CC = $(CROSS_COMPILE)gcc 321CPP = $(CC) -E 322AR = $(CROSS_COMPILE)ar 323NM = $(CROSS_COMPILE)nm 324STRIP = $(CROSS_COMPILE)strip 325OBJCOPY = $(CROSS_COMPILE)objcopy 326OBJDUMP = $(CROSS_COMPILE)objdump 327AWK = awk 328GENKSYMS = scripts/genksyms/genksyms 329DEPMOD = /sbin/depmod 330KALLSYMS = scripts/kallsyms 331PERL = perl 332CHECK = sparse 333 334NOSTDINC_FLAGS = -nostdinc -isystem $(shell $(CC) -print-file-name=include) 335CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ 336CHECKFLAGS += $(NOSTDINC_FLAGS) 337MODFLAGS = -DMODULE 338CFLAGS_MODULE = $(MODFLAGS) 339AFLAGS_MODULE = $(MODFLAGS) 340LDFLAGS_MODULE = -r 341CFLAGS_KERNEL = 342AFLAGS_KERNEL = 343 344 345# Use LINUXINCLUDE when you must reference the include/ directory. 346# Needed to be compatible with the O= option 347LINUXINCLUDE := -Iinclude \ 348 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) 349 350CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 351 352CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \ 353 -fno-strict-aliasing -fno-common \ 354 -ffreestanding 355AFLAGS := -D__ASSEMBLY__ 356 357export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \ 358 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ 359 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ 360 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 361 362export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 363export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 364export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 365 366# When compiling out-of-tree modules, put MODVERDIR in the module 367# tree rather than in the kernel tree. The kernel tree might 368# even be read-only. 369export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 370 371# The temporary file to save gcc -MD generated dependencies must not 372# contain a comma 373comma := , 374depfile = $(subst $(comma),_,$(@D)/.$(@F).d) 375 376# Files to ignore in find ... statements 377 378RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc \) -prune -o 379RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc 380 381# =========================================================================== 382# Rules shared between *config targets and build targets 383 384# Basic helpers built in scripts/ 385.PHONY: scripts_basic 386scripts_basic: 387 $(Q)$(MAKE) $(build)=scripts/basic 388 389.PHONY: outputmakefile 390# outputmakefile generate a Makefile to be placed in output directory, if 391# using a seperate output directory. This allows convinient use 392# of make in output directory 393outputmakefile: 394 $(Q)if test ! $(srctree) -ef $(objtree); then \ 395 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 396 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ 397 > $(objtree)/Makefile; \ 398 echo ' GEN $(objtree)/Makefile'; \ 399 fi 400 401# To make sure we do not include .config for any of the *config targets 402# catch them early, and hand them over to scripts/kconfig/Makefile 403# It is allowed to specify more targets when calling make, including 404# mixing *config targets and build targets. 405# For example 'make oldconfig all'. 406# Detect when mixed targets is specified, and make a second invocation 407# of make so .config is not included in this case either (for *config). 408 409no-dot-config-targets := clean mrproper distclean \ 410 cscope TAGS tags help %docs check% 411 412config-targets := 0 413mixed-targets := 0 414dot-config := 1 415 416ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 417 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 418 dot-config := 0 419 endif 420endif 421 422ifeq ($(KBUILD_EXTMOD),) 423 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 424 config-targets := 1 425 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 426 mixed-targets := 1 427 endif 428 endif 429endif 430 431ifeq ($(mixed-targets),1) 432# =========================================================================== 433# We're called with mixed targets (*config and build targets). 434# Handle them one by one. 435 436%:: FORCE 437 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 438 439else 440ifeq ($(config-targets),1) 441# =========================================================================== 442# *config targets only - make sure prerequisites are updated, and descend 443# in scripts/kconfig to make the *config target 444 445# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 446# KBUILD_DEFCONFIG may point out an alternative default configuration 447# used for 'make defconfig' 448include $(srctree)/arch/$(ARCH)/Makefile 449export KBUILD_DEFCONFIG 450 451config: scripts_basic outputmakefile FORCE 452 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 453%config: scripts_basic outputmakefile FORCE 454 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 455 456else 457# =========================================================================== 458# Build targets only - this includes vmlinux, arch specific targets, clean 459# targets and others. In general all targets except *config targets. 460 461ifeq ($(KBUILD_EXTMOD),) 462# Additional helpers built in scripts/ 463# Carefully list dependencies so we do not try to build scripts twice 464# in parrallel 465.PHONY: scripts 466scripts: scripts_basic include/config/MARKER 467 $(Q)$(MAKE) $(build)=$(@) 468 469scripts_basic: include/linux/autoconf.h 470 471# Objects we will link into vmlinux / subdirs we need to visit 472init-y := init/ 473drivers-y := drivers/ sound/ 474net-y := net/ 475libs-y := lib/ 476core-y := usr/ 477endif # KBUILD_EXTMOD 478 479ifeq ($(dot-config),1) 480# In this section, we need .config 481 482# Read in dependencies to all Kconfig* files, make sure to run 483# oldconfig if changes are detected. 484-include .config.cmd 485 486include .config 487 488# If .config needs to be updated, it will be done via the dependency 489# that autoconf has on .config. 490# To avoid any implicit rule to kick in, define an empty command 491.config: ; 492 493# If .config is newer than include/linux/autoconf.h, someone tinkered 494# with it and forgot to run make oldconfig 495include/linux/autoconf.h: .config 496 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 497else 498# Dummy target needed, because used as prerequisite 499include/linux/autoconf.h: ; 500endif 501 502# The all: target is the default when no target is given on the 503# command line. 504# This allow a user to issue only 'make' to build a kernel including modules 505# Defaults vmlinux but it is usually overriden in the arch makefile 506all: vmlinux 507 508ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 509CFLAGS += -Os 510else 511CFLAGS += -O2 512endif 513 514#Add align options if CONFIG_CC_* is not equal to 0 515add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1))) 516CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions) 517CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels) 518CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops) 519CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps) 520 521ifdef CONFIG_FRAME_POINTER 522CFLAGS += -fno-omit-frame-pointer 523else 524CFLAGS += -fomit-frame-pointer 525endif 526 527ifdef CONFIG_DEBUG_INFO 528CFLAGS += -g 529endif 530 531include $(srctree)/arch/$(ARCH)/Makefile 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 += $(call cc-option,-Wno-pointer-sign,) 538 539# Default kernel image to build when no specific target is given. 540# KBUILD_IMAGE may be overruled on the commandline or 541# set in the environment 542# Also any assingments in arch/$(ARCH)/Makefiel 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. Uncomment if you want to place them anywhere other than root. 549# 550 551#export INSTALL_PATH=/boot 552 553# 554# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 555# relocations required by build roots. This is not defined in the 556# makefile but the arguement can be passed to make if needed. 557# 558 559MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 560export MODLIB 561 562 563ifeq ($(KBUILD_EXTMOD),) 564core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ 565 566vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 567 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 568 $(net-y) $(net-m) $(libs-y) $(libs-m))) 569 570vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 571 $(init-n) $(init-) \ 572 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 573 $(net-n) $(net-) $(libs-n) $(libs-)))) 574 575init-y := $(patsubst %/, %/built-in.o, $(init-y)) 576core-y := $(patsubst %/, %/built-in.o, $(core-y)) 577drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 578net-y := $(patsubst %/, %/built-in.o, $(net-y)) 579libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 580libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 581libs-y := $(libs-y1) $(libs-y2) 582 583# Build vmlinux 584# --------------------------------------------------------------------------- 585# vmlinux is build from the objects selected by $(vmlinux-init) and 586# $(vmlinux-main). Most are built-in.o files from top-level directories 587# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 588# Ordering when linking is important, and $(vmlinux-init) must be first. 589# 590# vmlinux 591# ^ 592# | 593# +-< $(vmlinux-init) 594# | +--< init/version.o + more 595# | 596# +--< $(vmlinux-main) 597# | +--< driver/built-in.o mm/built-in.o + more 598# | 599# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 600# 601# vmlinux version (uname -v) cannot be updated during normal 602# descending-into-subdirs phase since we do not yet know if we need to 603# update vmlinux. 604# Therefore this step is delayed until just before final link of vmlinux - 605# except in the kallsyms case where it is done just before adding the 606# symbols to the kernel. 607# 608# System.map is generated to document addresses of all kernel symbols 609 610vmlinux-init := $(head-y) $(init-y) 611vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 612vmlinux-all := $(vmlinux-init) $(vmlinux-main) 613vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 614 615# Rule to link vmlinux - also used during CONFIG_KALLSYMS 616# May be overridden by arch/$(ARCH)/Makefile 617quiet_cmd_vmlinux__ ?= LD $@ 618 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 619 -T $(vmlinux-lds) $(vmlinux-init) \ 620 --start-group $(vmlinux-main) --end-group \ 621 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 622 623# Generate new vmlinux version 624quiet_cmd_vmlinux_version = GEN .version 625 cmd_vmlinux_version = set -e; \ 626 . $(srctree)/scripts/mkversion > .tmp_version; \ 627 mv -f .tmp_version .version; \ 628 $(MAKE) $(build)=init 629 630# Generate System.map 631quiet_cmd_sysmap = SYSMAP 632 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 633 634# Link of vmlinux 635# If CONFIG_KALLSYMS is set .version is already updated 636# Generate System.map and verify that the content is consistent 637 638define rule_vmlinux__ 639 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 640 641 $(call cmd,vmlinux__) 642 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 643 644 $(Q)$(if $($(quiet)cmd_sysmap), \ 645 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 646 $(cmd_sysmap) $@ System.map; \ 647 if [ $$? -ne 0 ]; then \ 648 rm -f $@; \ 649 /bin/false; \ 650 fi; 651 $(verify_kallsyms) 652endef 653 654 655ifdef CONFIG_KALLSYMS 656# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 657# It's a three stage process: 658# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 659# empty 660# Running kallsyms on that gives us .tmp_kallsyms1.o with 661# the right size - vmlinux version (uname -v) is updated during this step 662# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 663# but due to the added section, some addresses have shifted. 664# From here, we generate a correct .tmp_kallsyms2.o 665# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 666# o Verify that the System.map from vmlinux matches the map from 667# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 668# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 669# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 670# temporary bypass to allow the kernel to be built while the 671# maintainers work out what went wrong with kallsyms. 672 673ifdef CONFIG_KALLSYMS_EXTRA_PASS 674last_kallsyms := 3 675else 676last_kallsyms := 2 677endif 678 679kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 680 681define verify_kallsyms 682 $(Q)$(if $($(quiet)cmd_sysmap), \ 683 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 684 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 685 $(Q)cmp -s System.map .tmp_System.map || \ 686 (echo Inconsistent kallsyms data; \ 687 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 688 rm .tmp_kallsyms* ; /bin/false ) 689endef 690 691# Update vmlinux version before link 692# Use + in front of this rule to silent warning about make -j1 693cmd_ksym_ld = $(cmd_vmlinux__) 694define rule_ksym_ld 695 +$(call cmd,vmlinux_version) 696 $(call cmd,vmlinux__) 697 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 698endef 699 700# Generate .S file with all kernel symbols 701quiet_cmd_kallsyms = KSYM $@ 702 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 703 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 704 705.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 706 $(call if_changed_dep,as_o_S) 707 708.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 709 $(call cmd,kallsyms) 710 711# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 712.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 713 $(call if_changed_rule,ksym_ld) 714 715.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 716 $(call if_changed,vmlinux__) 717 718.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 719 $(call if_changed,vmlinux__) 720 721# Needs to visit scripts/ before $(KALLSYMS) can be used. 722$(KALLSYMS): scripts ; 723 724endif # ifdef CONFIG_KALLSYMS 725 726# vmlinux image - including updated kernel symbols 727vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 728 $(call if_changed_rule,vmlinux__) 729 730# The actual objects are generated when descending, 731# make sure no implicit rule kicks in 732$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 733 734# Handle descending into subdirectories listed in $(vmlinux-dirs) 735# Preset locale variables to speed up the build process. Limit locale 736# tweaks to this spot to avoid wrong language settings when running 737# make menuconfig etc. 738# Error messages still appears in the original language 739 740.PHONY: $(vmlinux-dirs) 741$(vmlinux-dirs): prepare-all scripts 742 $(Q)$(MAKE) $(build)=$@ 743 744# Things we need to do before we recursively start building the kernel 745# or the modules are listed in "prepare-all". 746# A multi level approach is used. prepare1 is updated first, then prepare0. 747# prepare-all is the collection point for the prepare targets. 748 749.PHONY: prepare-all prepare prepare0 prepare1 prepare2 750 751# prepare2 is used to check if we are building in a separate output directory, 752# and if so do: 753# 1) Check that make has not been executed in the kernel src $(srctree) 754# 2) Create the include2 directory, used for the second asm symlink 755 756prepare2: 757ifneq ($(KBUILD_SRC),) 758 @echo ' Using $(srctree) as source for kernel' 759 $(Q)if [ -h $(srctree)/include/asm -o -f $(srctree)/.config ]; then \ 760 echo " $(srctree) is not clean, please run 'make mrproper'";\ 761 echo " in the '$(srctree)' directory.";\ 762 /bin/false; \ 763 fi; 764 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 765 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 766endif 767 768# prepare1 creates a makefile if using a separate output directory 769prepare1: prepare2 outputmakefile 770 771prepare0: prepare1 include/linux/version.h include/asm include/config/MARKER 772ifneq ($(KBUILD_MODULES),) 773 $(Q)rm -rf $(MODVERDIR) 774 $(Q)mkdir -p $(MODVERDIR) 775endif 776 777# All the preparing.. 778prepare-all: prepare0 prepare 779 780# Leave this as default for preprocessing vmlinux.lds.S, which is now 781# done in arch/$(ARCH)/kernel/Makefile 782 783export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 784 785# Single targets 786# --------------------------------------------------------------------------- 787 788%.s: %.c scripts FORCE 789 $(Q)$(MAKE) $(build)=$(@D) $@ 790%.i: %.c scripts FORCE 791 $(Q)$(MAKE) $(build)=$(@D) $@ 792%.o: %.c scripts FORCE 793 $(Q)$(MAKE) $(build)=$(@D) $@ 794%/: scripts prepare FORCE 795 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) 796%.lst: %.c scripts FORCE 797 $(Q)$(MAKE) $(build)=$(@D) $@ 798%.s: %.S scripts FORCE 799 $(Q)$(MAKE) $(build)=$(@D) $@ 800%.o: %.S scripts FORCE 801 $(Q)$(MAKE) $(build)=$(@D) $@ 802 803# FIXME: The asm symlink changes when $(ARCH) changes. That's 804# hard to detect, but I suppose "make mrproper" is a good idea 805# before switching between archs anyway. 806 807include/asm: 808 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 809 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 810 @ln -fsn asm-$(ARCH) $@ 811 812# Split autoconf.h into include/linux/config/* 813 814include/config/MARKER: include/linux/autoconf.h 815 @echo ' SPLIT include/linux/autoconf.h -> include/config/*' 816 @scripts/basic/split-include include/linux/autoconf.h include/config 817 @touch $@ 818 819# Generate some files 820# --------------------------------------------------------------------------- 821 822# KERNELRELEASE can change from a few different places, meaning version.h 823# needs to be updated, so this check is forced on all builds 824 825uts_len := 64 826 827define filechk_version.h 828 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 829 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 830 exit 1; \ 831 fi; \ 832 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ 833 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ 834 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ 835 ) 836endef 837 838include/linux/version.h: $(srctree)/Makefile FORCE 839 $(call filechk,version.h) 840 841# --------------------------------------------------------------------------- 842 843.PHONY: depend dep 844depend dep: 845 @echo '*** Warning: make $@ is unnecessary now.' 846 847# --------------------------------------------------------------------------- 848# Modules 849 850ifdef CONFIG_MODULES 851 852# By default, build modules as well 853 854all: modules 855 856# Build modules 857 858.PHONY: modules 859modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 860 @echo ' Building modules, stage 2.'; 861 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 862 863 864# Target to prepare building external modules 865.PHONY: modules_prepare 866modules_prepare: prepare-all scripts 867 868# Target to install modules 869.PHONY: modules_install 870modules_install: _modinst_ _modinst_post 871 872.PHONY: _modinst_ 873_modinst_: 874 @if [ -z "`$(DEPMOD) -V | grep module-init-tools`" ]; then \ 875 echo "Warning: you may need to install module-init-tools"; \ 876 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 877 sleep 1; \ 878 fi 879 @rm -rf $(MODLIB)/kernel 880 @rm -f $(MODLIB)/source 881 @mkdir -p $(MODLIB)/kernel 882 @ln -s $(srctree) $(MODLIB)/source 883 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 884 rm -f $(MODLIB)/build ; \ 885 ln -s $(objtree) $(MODLIB)/build ; \ 886 fi 887 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 888 889# If System.map exists, run depmod. This deliberately does not have a 890# dependency on System.map since that would run the dependency tree on 891# vmlinux. This depmod is only for convenience to give the initial 892# boot a modules.dep even before / is mounted read-write. However the 893# boot script depmod is the master version. 894ifeq "$(strip $(INSTALL_MOD_PATH))" "" 895depmod_opts := 896else 897depmod_opts := -b $(INSTALL_MOD_PATH) -r 898endif 899.PHONY: _modinst_post 900_modinst_post: _modinst_ 901 if [ -r System.map ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 902 903else # CONFIG_MODULES 904 905# Modules not configured 906# --------------------------------------------------------------------------- 907 908modules modules_install: FORCE 909 @echo 910 @echo "The present kernel configuration has modules disabled." 911 @echo "Type 'make config' and enable loadable module support." 912 @echo "Then build a kernel with module support enabled." 913 @echo 914 @exit 1 915 916endif # CONFIG_MODULES 917 918# Generate asm-offsets.h 919# --------------------------------------------------------------------------- 920 921define filechk_gen-asm-offsets 922 (set -e; \ 923 echo "#ifndef __ASM_OFFSETS_H__"; \ 924 echo "#define __ASM_OFFSETS_H__"; \ 925 echo "/*"; \ 926 echo " * DO NOT MODIFY."; \ 927 echo " *"; \ 928 echo " * This file was generated by arch/$(ARCH)/Makefile"; \ 929 echo " *"; \ 930 echo " */"; \ 931 echo ""; \ 932 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ 933 echo ""; \ 934 echo "#endif" ) 935endef 936 937 938### 939# Cleaning is done on three levels. 940# make clean Delete most generated files 941# Leave enough to build external modules 942# make mrproper Delete the current configuration, and all generated files 943# make distclean Remove editor backup files, patch leftover files and the like 944 945# Directories & files removed with 'make clean' 946CLEAN_DIRS += $(MODVERDIR) 947CLEAN_FILES += vmlinux System.map \ 948 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 949 950# Directories & files removed with 'make mrproper' 951MRPROPER_DIRS += include/config include2 952MRPROPER_FILES += .config .config.old include/asm .version \ 953 include/linux/autoconf.h include/linux/version.h \ 954 Module.symvers tags TAGS cscope* 955 956# clean - Delete most, but leave enough to build external modules 957# 958clean: rm-dirs := $(CLEAN_DIRS) 959clean: rm-files := $(CLEAN_FILES) 960clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs)) 961 962.PHONY: $(clean-dirs) clean archclean 963$(clean-dirs): 964 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 965 966clean: archclean $(clean-dirs) 967 $(call cmd,rmdirs) 968 $(call cmd,rmfiles) 969 @find . $(RCS_FIND_IGNORE) \ 970 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 971 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 972 -type f -print | xargs rm -f 973 974# mrproper - Delete all generated files, including .config 975# 976mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 977mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 978mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 979 980.PHONY: $(mrproper-dirs) mrproper archmrproper 981$(mrproper-dirs): 982 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 983 984mrproper: clean archmrproper $(mrproper-dirs) 985 $(call cmd,rmdirs) 986 $(call cmd,rmfiles) 987 988# distclean 989# 990.PHONY: distclean 991 992distclean: mrproper 993 @find $(srctree) $(RCS_FIND_IGNORE) \ 994 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 995 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 996 -o -name '.*.rej' -o -size 0 \ 997 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 998 -type f -print | xargs rm -f 999 1000
1001# Packaging of the kernel to various formats 1002# --------------------------------------------------------------------------- 1003# rpm target kept for backward compatibility 1004package-dir := $(srctree)/scripts/package 1005 1006.PHONY: %-pkg rpm 1007 1008%pkg: FORCE 1009 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 1010rpm: FORCE 1011 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 1012 1013 1014# Brief documentation of the typical targets used 1015# --------------------------------------------------------------------------- 1016 1017boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1018boards := $(notdir $(boards)) 1019 1020help: 1021 @echo 'Cleaning targets:' 1022 @echo ' clean - remove most generated files but keep the config' 1023 @echo ' mrproper - remove all generated files + config + various backup files' 1024 @echo '' 1025 @echo 'Configuration targets:' 1026 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1027 @echo '' 1028 @echo 'Other generic targets:' 1029 @echo ' all - Build all targets marked with [*]' 1030 @echo '* vmlinux - Build the bare kernel' 1031 @echo '* modules - Build all modules' 1032 @echo ' modules_install - Install all modules' 1033 @echo ' dir/ - Build all files in dir and below' 1034 @echo ' dir/file.[ois] - Build specified target only' 1035 @echo ' rpm - Build a kernel as an RPM package' 1036 @echo ' tags/TAGS - Generate tags file for editors' 1037 @echo ' cscope - Generate cscope index' 1038 @echo '' 1039 @echo 'Static analysers' 1040 @echo ' buildcheck - List dangling references to vmlinux discarded sections' 1041 @echo ' and init sections from non-init sections' 1042 @echo ' checkstack - Generate a list of stack hogs' 1043 @echo ' namespacecheck - Name space analysis on compiled kernel' 1044 @echo '' 1045 @echo 'Kernel packaging:' 1046 @$(MAKE) -f $(package-dir)/Makefile help 1047 @echo '' 1048 @echo 'Documentation targets:' 1049 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1050 @echo '' 1051 @echo 'Architecture specific targets ($(ARCH)):' 1052 @$(if $(archhelp),$(archhelp),\ 1053 echo ' No architecture specific help defined for $(ARCH)') 1054 @echo '' 1055 @$(if $(boards), \ 1056 $(foreach b, $(boards), \ 1057 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1058 echo '') 1059 1060 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1061 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1062 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' 1063 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' 1064 @echo '' 1065 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1066 @echo 'For further info see the ./README file' 1067 1068 1069# Documentation targets 1070# --------------------------------------------------------------------------- 1071%docs: scripts_basic FORCE 1072 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1073 1074else # KBUILD_EXTMOD 1075 1076### 1077# External module support. 1078# When building external modules the kernel used as basis is considered 1079# read-only, and no consistency checks are made and the make 1080# system is not used on the basis kernel. If updates are required 1081# in the basis kernel ordinary make commands (without M=...) must 1082# be used. 1083# 1084# The following are the only valid targets when building external 1085# modules. 1086# make M=dir clean Delete all automatically generated files 1087# make M=dir modules Make all modules in specified dir 1088# make M=dir Same as 'make M=dir modules' 1089# make M=dir modules_install 1090# Install the modules build in the module directory 1091# Assumes install directory is already created 1092 1093# We are always building modules 1094KBUILD_MODULES := 1 1095.PHONY: crmodverdir 1096crmodverdir: 1097 $(Q)mkdir -p $(MODVERDIR) 1098 1099module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1100.PHONY: $(module-dirs) modules 1101$(module-dirs): crmodverdir 1102 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1103 1104modules: $(module-dirs) 1105 @echo ' Building modules, stage 2.'; 1106 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1107 1108.PHONY: modules_install 1109modules_install: 1110 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1111 1112clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1113 1114.PHONY: $(clean-dirs) clean 1115$(clean-dirs): 1116 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1117 1118clean: rm-dirs := $(MODVERDIR) 1119clean: $(clean-dirs) 1120 $(call cmd,rmdirs) 1121 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1122 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1123 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1124 -type f -print | xargs rm -f 1125 1126help: 1127 @echo ' Building external modules.' 1128 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1129 @echo '' 1130 @echo ' modules - default target, build the module(s)' 1131 @echo ' modules_install - install the module' 1132 @echo ' clean - remove generated files in module directory only' 1133 @echo '' 1134endif # KBUILD_EXTMOD 1135 1136# Generate tags for editors 1137# --------------------------------------------------------------------------- 1138 1139define all-sources 1140 ( find $(srctree) $(RCS_FIND_IGNORE) \ 1141 \( -name include -o -name arch \) -prune -o \ 1142 -name '*.[chS]' -print; \ 1143 find $(srctree)/arch/$(ARCH) $(RCS_FIND_IGNORE) \ 1144 -name '*.[chS]' -print; \ 1145 find $(srctree)/security/selinux/include $(RCS_FIND_IGNORE) \ 1146 -name '*.[chS]' -print; \ 1147 find $(srctree)/include $(RCS_FIND_IGNORE) \ 1148 \( -name config -o -name 'asm-*' \) -prune \ 1149 -o -name '*.[chS]' -print; \ 1150 find $(srctree)/include/asm-$(ARCH) $(RCS_FIND_IGNORE) \ 1151 -name '*.[chS]' -print; \ 1152 find $(srctree)/include/asm-generic $(RCS_FIND_IGNORE) \ 1153 -name '*.[chS]' -print ) 1154endef 1155 1156quiet_cmd_cscope-file = FILELST cscope.files 1157 cmd_cscope-file = $(all-sources) > cscope.files 1158 1159quiet_cmd_cscope = MAKE cscope.out 1160 cmd_cscope = cscope -k -b -q 1161 1162cscope: FORCE 1163 $(call cmd,cscope-file) 1164 $(call cmd,cscope) 1165 1166quiet_cmd_TAGS = MAKE $@ 1167cmd_TAGS = $(all-sources) | etags - 1168 1169# Exuberant ctags works better with -I 1170 1171quiet_cmd_tags = MAKE $@ 1172define cmd_tags 1173 rm -f $@; \ 1174 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL"`; \ 1175 $(all-sources) | xargs ctags $$CTAGSF -a 1176endef 1177 1178TAGS: FORCE 1179 $(call cmd,TAGS) 1180 1181tags: FORCE 1182 $(call cmd,tags) 1183 1184 1185# Scripts to check various things for consistency 1186# --------------------------------------------------------------------------- 1187 1188configcheck: 1189 find * $(RCS_FIND_IGNORE) \ 1190 -name '*.[hcS]' -type f -print | sort \ 1191 | xargs $(PERL) -w scripts/checkconfig.pl 1192 1193includecheck: 1194 find * $(RCS_FIND_IGNORE) \ 1195 -name '*.[hcS]' -type f -print | sort \ 1196 | xargs $(PERL) -w scripts/checkincludes.pl 1197 1198versioncheck: 1199 find * $(RCS_FIND_IGNORE) \ 1200 -name '*.[hcS]' -type f -print | sort \ 1201 | xargs $(PERL) -w scripts/checkversion.pl 1202 1203buildcheck: 1204 $(PERL) $(srctree)/scripts/reference_discarded.pl 1205 $(PERL) $(srctree)/scripts/reference_init.pl 1206 1207namespacecheck: 1208 $(PERL) $(srctree)/scripts/namespace.pl 1209 1210endif #ifeq ($(config-targets),1) 1211endif #ifeq ($(mixed-targets),1) 1212 1213.PHONY: checkstack 1214checkstack: 1215 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1216 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1217 1218kernelrelease: 1219 @echo $(KERNELRELEASE) 1220 1221# FIXME Should go into a make.lib or something 1222# =========================================================================== 1223 1224quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1225 cmd_rmdirs = rm -rf $(rm-dirs) 1226 1227quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1228 cmd_rmfiles = rm -f $(rm-files) 1229 1230 1231a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1232 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1233 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) 1234 1235quiet_cmd_as_o_S = AS $@ 1236cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1237 1238# read all saved command lines 1239 1240targets := $(wildcard $(sort $(targets))) 1241cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1242 1243ifneq ($(cmd_files),) 1244 $(cmd_files): ; # Do not try to update included dependency files 1245 include $(cmd_files) 1246endif 1247 1248# Execute command and generate cmd file 1249if_changed = $(if $(strip $? \ 1250 $(filter-out $(cmd_$(1)),$(cmd_$@))\ 1251 $(filter-out $(cmd_$@),$(cmd_$(1)))),\ 1252 @set -e; \ 1253 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ 1254 $(cmd_$(1)); \ 1255 echo 'cmd_$@ := $(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).cmd) 1256 1257 1258# execute the command and also postprocess generated .d dependencies 1259# file 1260if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\ 1261 $(filter-out $(cmd_$(1)),$(cmd_$@))\ 1262 $(filter-out $(cmd_$@),$(cmd_$(1)))),\ 1263 $(Q)set -e; \ 1264 $(if $($(quiet)cmd_$(1)),echo ' $(subst ','\'',$($(quiet)cmd_$(1)))';) \ 1265 $(cmd_$(1)); \ 1266 scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(subst ','\'',$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \ 1267 rm -f $(depfile); \ 1268 mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd) 1269 1270# Usage: $(call if_changed_rule,foo) 1271# will check if $(cmd_foo) changed, or any of the prequisites changed, 1272# and if so will execute $(rule_foo) 1273 1274if_changed_rule = $(if $(strip $? \ 1275 $(filter-out $(cmd_$(1)),$(cmd_$(@F)))\ 1276 $(filter-out $(cmd_$(@F)),$(cmd_$(1)))),\ 1277 $(Q)$(rule_$(1))) 1278 1279# If quiet is set, only print short version of command 1280 1281cmd = @$(if $($(quiet)cmd_$(1)),echo ' $($(quiet)cmd_$(1))' &&) $(cmd_$(1)) 1282 1283# filechk is used to check if the content of a generated file is updated. 1284# Sample usage: 1285# define filechk_sample 1286# echo $KERNELRELEASE 1287# endef 1288# version.h : Makefile 1289# $(call filechk,sample) 1290# The rule defined shall write to stdout the content of the new file. 1291# The existing file will be compared with the new one. 1292# - If no file exist it is created 1293# - If the content differ the new file is used 1294# - If they are equal no change, and no timestamp update 1295 1296define filechk 1297 @set -e; \ 1298 echo ' CHK $@'; \ 1299 mkdir -p $(dir $@); \ 1300 $(filechk_$(1)) < $< > $@.tmp; \ 1301 if [ -r $@ ] && cmp -s $@ $@.tmp; then \ 1302 rm -f $@.tmp; \ 1303 else \ 1304 echo ' UPD $@'; \ 1305 mv -f $@.tmp $@; \ 1306 fi 1307endef 1308 1309# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=dir 1310# Usage: 1311# $(Q)$(MAKE) $(build)=dir 1312build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj 1313 1314# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1315# Usage: 1316# $(Q)$(MAKE) $(clean)=dir 1317clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1318 1319# $(call descend,<dir>,<target>) 1320# Recursively call a sub-make in <dir> with target <target> 1321# Usage is deprecated, because make does not see this as an invocation of make. 1322descend =$(Q)$(MAKE) -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj=$(1) $(2) 1323 1324endif # skip-makefile 1325 1326FORCE: 1327