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