1VERSION = 1 2PATCHLEVEL = 26 3SUBLEVEL = 2 4EXTRAVERSION = 5NAME = Unnamed 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 busybox), 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 := $(O) 94 endif 95endif 96 97# That's our default target when none is given on the command line 98PHONY := _all 99_all: 100 101ifneq ($(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 109PHONY += $(MAKECMDGOALS) 110 111$(filter-out _all,$(MAKECMDGOALS)) _all: 112 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 113 KBUILD_SRC=$(CURDIR) \ 114 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ 115 116# Leave processing to above invocation of make 117skip-makefile := 1 118endif # ifneq ($(KBUILD_OUTPUT),) 119endif # ifeq ($(KBUILD_SRC),) 120 121# We process the rest of the Makefile if this is the final invocation of make 122ifeq ($(skip-makefile),) 123 124# If building an external module we do not care about the all: rule 125# but instead _all depend on modules 126PHONY += 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 := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 141 142export srctree objtree VPATH TOPDIR 143 144 145# Cross compiling and selecting different set of gcc/bin-utils 146# --------------------------------------------------------------------------- 147# 148# When performing cross compilation for other architectures ARCH shall be set 149# to the target architecture. (See arch/* for the possibilities). 150# ARCH can be set during invocation of make: 151# make ARCH=ia64 152# Another way is to have ARCH set in the environment. 153# The default ARCH is the host where make is executed. 154 155# CROSS_COMPILE specify the prefix used for all executables used 156# during compilation. Only gcc and related bin-utils executables 157# are prefixed with $(CROSS_COMPILE). 158# CROSS_COMPILE can be set on the command line 159# make CROSS_COMPILE=ia64-linux- 160# Alternatively CROSS_COMPILE can be set in the environment. 161# Default value for CROSS_COMPILE is not to prefix executables 162# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 163 164CROSS_COMPILE ?= 165# bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config, 166# and it has not been included yet... thus using an awkward syntax. 167ifeq ($(CROSS_COMPILE),) 168CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null) 169CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE)) 170CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE)) 171#") 172endif 173 174# SUBARCH tells the usermode build what the underlying arch is. That is set 175# first, and if a usermode build is happening, the "ARCH=um" on the command 176# line overrides the setting of ARCH below. If a native build is happening, 177# then ARCH is assigned, getting whatever value it gets normally, and 178# SUBARCH is subsequently ignored. 179 180ifneq ($(CROSS_COMPILE),) 181SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1) 182else 183SUBARCH := $(shell uname -m) 184endif 185SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 186 -e s/arm.*/arm/ -e s/sa110/arm/ \ 187 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 188 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) 189 190ARCH ?= $(SUBARCH) 191 192# Architecture as present in compile.h 193UTS_MACHINE := $(ARCH) 194 195# SHELL used by kbuild 196CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 197 else if [ -x /bin/bash ]; then echo /bin/bash; \ 198 else echo sh; fi ; fi) 199 200# Decide whether to build built-in, modular, or both. 201# Normally, just do built-in. 202 203KBUILD_MODULES := 204KBUILD_BUILTIN := 1 205 206# If we have only "make modules", don't compile built-in objects. 207# When we're building modules with modversions, we need to consider 208# the built-in objects during the descend as well, in order to 209# make sure the checksums are uptodate before we record them. 210 211ifeq ($(MAKECMDGOALS),modules) 212 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 213endif 214 215# If we have "make <whatever> modules", compile modules 216# in addition to whatever we do anyway. 217# Just "make" or "make all" shall build modules as well 218 219ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 220 KBUILD_MODULES := 1 221endif 222 223ifeq ($(MAKECMDGOALS),) 224 KBUILD_MODULES := 1 225endif 226 227export KBUILD_MODULES KBUILD_BUILTIN 228export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 229 230# Beautify output 231# --------------------------------------------------------------------------- 232# 233# Normally, we echo the whole command before executing it. By making 234# that echo $($(quiet)$(cmd)), we now have the possibility to set 235# $(quiet) to choose other forms of output instead, e.g. 236# 237# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 238# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 239# 240# If $(quiet) is empty, the whole command will be printed. 241# If it is set to "quiet_", only the short version will be printed. 242# If it is set to "silent_", nothing wil be printed at all, since 243# the variable $(silent_cmd_cc_o_c) doesn't exist. 244# 245# A simple variant is to prefix commands with $(Q) - that's useful 246# for commands that shall be hidden in non-verbose mode. 247# 248# $(Q)ln $@ :< 249# 250# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 251# If KBUILD_VERBOSE equals 1 then the above command is displayed. 252 253ifeq ($(KBUILD_VERBOSE),1) 254 quiet = 255 Q = 256else 257 quiet=quiet_ 258 Q = @ 259endif 260 261# If the user is running make -s (silent mode), suppress echoing of 262# commands 263 264ifneq ($(findstring s,$(MAKEFLAGS)),) 265 quiet=silent_ 266endif 267 268export quiet Q KBUILD_VERBOSE 269 270 271# Look for make include files relative to root of kernel src 272MAKEFLAGS += --include-dir=$(srctree) 273 274HOSTCC = gcc 275HOSTCXX = g++ 276HOSTCFLAGS := 277HOSTCXXFLAGS := 278# We need some generic definitions 279include $(srctree)/scripts/Kbuild.include 280 281HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,) 282HOSTCXXFLAGS += -O2 283 284# For maximum performance (+ possibly random breakage, uncomment 285# the following) 286 287MAKEFLAGS += -rR 288 289# Make variables (CC, etc...) 290 291AS = $(CROSS_COMPILE)as 292CC = $(CROSS_COMPILE)gcc 293LD = $(CC) -nostdlib 294CPP = $(CC) -E 295AR = $(CROSS_COMPILE)ar 296NM = $(CROSS_COMPILE)nm 297STRIP = $(CROSS_COMPILE)strip 298OBJCOPY = $(CROSS_COMPILE)objcopy 299OBJDUMP = $(CROSS_COMPILE)objdump 300PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config 301AWK = awk 302GENKSYMS = scripts/genksyms/genksyms 303DEPMOD = /sbin/depmod 304KALLSYMS = scripts/kallsyms 305PERL = perl 306CHECK = sparse 307 308CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 309MODFLAGS = -DMODULE 310CFLAGS_MODULE = $(MODFLAGS) 311AFLAGS_MODULE = $(MODFLAGS) 312LDFLAGS_MODULE = -r 313CFLAGS_KERNEL = 314AFLAGS_KERNEL = 315 316 317# Use LINUXINCLUDE when you must reference the include/ directory. 318# Needed to be compatible with the O= option 319CFLAGS := $(CFLAGS) 320# Added only to final link stage of busybox binary 321CFLAGS_busybox := $(CFLAGS_busybox) 322CPPFLAGS := $(CPPFLAGS) 323AFLAGS := $(AFLAGS) 324LDFLAGS := $(LDFLAGS) 325LDLIBS := 326 327# Read KERNELRELEASE from .kernelrelease (if it exists) 328KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) 329KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 330 331export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ 332 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ 333 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ 334 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 335 336export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 337export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 338export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 339export FLTFLAGS 340 341# When compiling out-of-tree modules, put MODVERDIR in the module 342# tree rather than in the kernel tree. The kernel tree might 343# even be read-only. 344export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 345 346# Files to ignore in find ... statements 347 348RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 349export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 350 351# =========================================================================== 352# Rules shared between *config targets and build targets 353 354# Basic helpers built in scripts/ 355PHONY += scripts_basic 356scripts_basic: 357 $(Q)$(MAKE) $(build)=scripts/basic 358 359# To avoid any implicit rule to kick in, define an empty command. 360scripts/basic/%: scripts_basic ; 361 362# This target generates Kbuild's and Config.in's from *.c files 363PHONY += gen_build_files 364gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) 365 $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree) 366 367# bbox: we have helpers in applets/ 368# we depend on scripts_basic, since scripts/basic/fixdep 369# must be built before any other host prog 370PHONY += applets_dir 371applets_dir: scripts_basic gen_build_files 372 $(Q)$(MAKE) $(build)=applets 373 374applets/%: applets_dir ; 375 376PHONY += outputmakefile 377# outputmakefile generates a Makefile in the output directory, if using a 378# separate output directory. This allows convenient use of make in the 379# output directory. 380outputmakefile: 381ifneq ($(KBUILD_SRC),) 382 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 383 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 384endif 385 386# To make sure we do not include .config for any of the *config targets 387# catch them early, and hand them over to scripts/kconfig/Makefile 388# It is allowed to specify more targets when calling make, including 389# mixing *config targets and build targets. 390# For example 'make oldconfig all'. 391# Detect when mixed targets is specified, and make a second invocation 392# of make so .config is not included in this case either (for *config). 393 394no-dot-config-targets := clean mrproper distclean \ 395 cscope TAGS tags help %docs 396#bbox# check% is removed from above 397 398config-targets := 0 399mixed-targets := 0 400dot-config := 1 401 402ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 403 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 404 dot-config := 0 405 endif 406endif 407 408ifeq ($(KBUILD_EXTMOD),) 409 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 410 config-targets := 1 411 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 412 mixed-targets := 1 413 endif 414 endif 415endif 416 417ifeq ($(mixed-targets),1) 418# =========================================================================== 419# We're called with mixed targets (*config and build targets). 420# Handle them one by one. 421 422%:: FORCE 423 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 424 425else 426ifeq ($(config-targets),1) 427# =========================================================================== 428# *config targets only - make sure prerequisites are updated, and descend 429# in scripts/kconfig to make the *config target 430 431# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 432# KBUILD_DEFCONFIG may point out an alternative default configuration 433# used for 'make defconfig' 434-include $(srctree)/arch/$(ARCH)/Makefile 435export KBUILD_DEFCONFIG 436 437config: scripts_basic outputmakefile gen_build_files FORCE 438 $(Q)mkdir -p include 439 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 440 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease 441 442%config: scripts_basic outputmakefile gen_build_files FORCE 443 $(Q)mkdir -p include 444 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 445 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease 446 447else 448# =========================================================================== 449# Build targets only - this includes busybox, arch specific targets, clean 450# targets and others. In general all targets except *config targets. 451 452ifeq ($(KBUILD_EXTMOD),) 453# Additional helpers built in scripts/ 454# Carefully list dependencies so we do not try to build scripts twice 455# in parallel 456PHONY += scripts 457scripts: gen_build_files scripts_basic include/config/MARKER 458 $(Q)$(MAKE) $(build)=$(@) 459 460scripts_basic: include/autoconf.h 461 462# Objects we will link into busybox / subdirs we need to visit 463core-y := \ 464 applets/ \ 465 466libs-y := \ 467 archival/ \ 468 archival/libarchive/ \ 469 console-tools/ \ 470 coreutils/ \ 471 coreutils/libcoreutils/ \ 472 debianutils/ \ 473 e2fsprogs/ \ 474 editors/ \ 475 findutils/ \ 476 init/ \ 477 libbb/ \ 478 libpwdgrp/ \ 479 loginutils/ \ 480 mailutils/ \ 481 miscutils/ \ 482 modutils/ \ 483 networking/ \ 484 networking/libiproute/ \ 485 networking/udhcp/ \ 486 printutils/ \ 487 procps/ \ 488 runit/ \ 489 selinux/ \ 490 shell/ \ 491 sysklogd/ \ 492 util-linux/ \ 493 util-linux/volume_id/ \ 494 495endif # KBUILD_EXTMOD 496 497ifeq ($(dot-config),1) 498# In this section, we need .config 499 500# Read in dependencies to all Kconfig* files, make sure to run 501# oldconfig if changes are detected. 502-include .kconfig.d 503 504-include .config 505 506# If .config needs to be updated, it will be done via the dependency 507# that autoconf has on .config. 508# To avoid any implicit rule to kick in, define an empty command 509.config .kconfig.d: ; 510 511# Now we can define CFLAGS etc according to .config 512include $(srctree)/Makefile.flags 513 514# If .config is newer than include/autoconf.h, someone tinkered 515# with it and forgot to run make oldconfig. 516# If kconfig.d is missing then we are probarly in a cleaned tree so 517# we execute the config step to be sure to catch updated Kconfig files 518include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files 519 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 520 521include/usage.h: gen_build_files 522 523else 524# Dummy target needed, because used as prerequisite 525include/autoconf.h: ; 526endif 527 528# The all: target is the default when no target is given on the 529# command line. 530# This allow a user to issue only 'make' to build a kernel including modules 531# Defaults busybox but it is usually overridden in the arch makefile 532all: busybox doc 533 534-include $(srctree)/arch/$(ARCH)/Makefile 535 536# arch Makefile may override CC so keep this after arch Makefile is included 537#bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 538CHECKFLAGS += $(NOSTDINC_FLAGS) 539 540# Default kernel image to build when no specific target is given. 541# KBUILD_IMAGE may be overruled on the commandline or 542# set in the environment 543# Also any assignments in arch/$(ARCH)/Makefile take precedence over 544# this default value 545export KBUILD_IMAGE ?= busybox 546 547# 548# INSTALL_PATH specifies where to place the updated kernel and system map 549# images. Default is /boot, but you can set it to other values 550export INSTALL_PATH ?= /boot 551 552# 553# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 554# relocations required by build roots. This is not defined in the 555# makefile but the argument can be passed to make if needed. 556# 557 558MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 559export MODLIB 560 561 562ifeq ($(KBUILD_EXTMOD),) 563busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m))) 564 565busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \ 566 $(core-n) $(core-) $(libs-n) $(libs-) \ 567 ))) 568 569core-y := $(patsubst %/, %/built-in.o, $(core-y)) 570libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 571libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 572libs-y := $(libs-y1) $(libs-y2) 573 574# Build busybox 575# --------------------------------------------------------------------------- 576# busybox is build from the objects selected by $(busybox-init) and 577# $(busybox-main). Most are built-in.o files from top-level directories 578# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 579# Ordering when linking is important, and $(busybox-init) must be first. 580# 581# busybox 582# ^ 583# | 584# +-< $(busybox-init) 585# | +--< init/version.o + more 586# | 587# +--< $(busybox-main) 588# | +--< driver/built-in.o mm/built-in.o + more 589# | 590# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 591# 592# busybox version (uname -v) cannot be updated during normal 593# descending-into-subdirs phase since we do not yet know if we need to 594# update busybox. 595# Therefore this step is delayed until just before final link of busybox - 596# except in the kallsyms case where it is done just before adding the 597# symbols to the kernel. 598# 599# System.map is generated to document addresses of all kernel symbols 600 601busybox-all := $(core-y) $(libs-y) 602 603# Rule to link busybox - also used during CONFIG_KALLSYMS 604# May be overridden by arch/$(ARCH)/Makefile 605quiet_cmd_busybox__ ?= LINK $@ 606 cmd_busybox__ ?= $(srctree)/scripts/trylink \ 607 "$@" \ 608 "$(CC)" \ 609 "$(CFLAGS) $(CFLAGS_busybox)" \ 610 "$(LDFLAGS) $(EXTRA_LDFLAGS)" \ 611 "$(core-y)" \ 612 "$(libs-y)" \ 613 "$(LDLIBS)" \ 614 && $(srctree)/scripts/generate_BUFSIZ.sh --post include/common_bufsiz.h 615 616# Generate System.map 617quiet_cmd_sysmap = SYSMAP 618 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 619 620# Link of busybox 621# If CONFIG_KALLSYMS is set .version is already updated 622# Generate System.map and verify that the content is consistent 623# Use + in front of the busybox_version rule to silent warning with make -j2 624# First command is ':' to allow us to use + in front of the rule 625define rule_busybox__ 626 : 627 $(call cmd,busybox__) 628 $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd 629endef 630 631 632ifdef CONFIG_KALLSYMS 633# Generate section listing all symbols and add it into busybox $(kallsyms.o) 634# It's a three stage process: 635# o .tmp_busybox1 has all symbols and sections, but __kallsyms is 636# empty 637# Running kallsyms on that gives us .tmp_kallsyms1.o with 638# the right size - busybox version (uname -v) is updated during this step 639# o .tmp_busybox2 now has a __kallsyms section of the right size, 640# but due to the added section, some addresses have shifted. 641# From here, we generate a correct .tmp_kallsyms2.o 642# o The correct .tmp_kallsyms2.o is linked into the final busybox. 643# o Verify that the System.map from busybox matches the map from 644# .tmp_busybox2, just in case we did not generate kallsyms correctly. 645# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 646# .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a 647# temporary bypass to allow the kernel to be built while the 648# maintainers work out what went wrong with kallsyms. 649 650ifdef CONFIG_KALLSYMS_EXTRA_PASS 651last_kallsyms := 3 652else 653last_kallsyms := 2 654endif 655 656kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 657 658define verify_kallsyms 659 $(Q)$(if $($(quiet)cmd_sysmap), \ 660 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 661 $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map 662 $(Q)cmp -s System.map .tmp_System.map || \ 663 (echo Inconsistent kallsyms data; \ 664 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 665 rm .tmp_kallsyms* ; /bin/false ) 666endef 667 668# Update busybox version before link 669# Use + in front of this rule to silent warning about make -j1 670# First command is ':' to allow us to use + in front of this rule 671cmd_ksym_ld = $(cmd_busybox__) 672define rule_ksym_ld 673 : 674 +$(call cmd,busybox_version) 675 $(call cmd,busybox__) 676 $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd 677endef 678 679# Generate .S file with all kernel symbols 680quiet_cmd_kallsyms = KSYM $@ 681 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 682 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 683 684.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 685 $(call if_changed_dep,as_o_S) 686 687.tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS) 688 $(call cmd,kallsyms) 689 690# .tmp_busybox1 must be complete except kallsyms, so update busybox version 691.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE 692 $(call if_changed_rule,ksym_ld) 693 694.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE 695 $(call if_changed,busybox__) 696 697.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE 698 $(call if_changed,busybox__) 699 700# Needs to visit scripts/ before $(KALLSYMS) can be used. 701$(KALLSYMS): scripts ; 702 703# Generate some data for debugging strange kallsyms problems 704debug_kallsyms: .tmp_map$(last_kallsyms) 705 706.tmp_map%: .tmp_busybox% FORCE 707 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 708 709.tmp_map3: .tmp_map2 710 711.tmp_map2: .tmp_map1 712 713endif # ifdef CONFIG_KALLSYMS 714 715# busybox image - including updated kernel symbols 716busybox_unstripped: $(busybox-all) FORCE 717 $(call if_changed_rule,busybox__) 718 $(Q)rm -f .old_version 719 720busybox: busybox_unstripped 721ifeq ($(SKIP_STRIP),y) 722 $(Q)cp $< $@ 723else 724 $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \ 725 busybox_unstripped -o $@ 726# strip is confused by PIE executable and does not set exec bits 727 $(Q)chmod a+x $@ 728endif 729 730# The actual objects are generated when descending, 731# make sure no implicit rule kicks in 732$(sort $(busybox-all)): $(busybox-dirs) ; 733 734# Handle descending into subdirectories listed in $(busybox-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 740PHONY += $(busybox-dirs) 741$(busybox-dirs): prepare scripts 742 $(Q)$(MAKE) $(build)=$@ 743 744# Build the kernel release string 745# The KERNELRELEASE is stored in a file named .kernelrelease 746# to be used when executing for example make install or make modules_install 747# 748# Take the contents of any files called localversion* and the config 749# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. 750# LOCALVERSION from the command line override all of this 751 752nullstring := 753space := $(nullstring) # end of line 754 755___localver = $(objtree)/localversion* $(srctree)/localversion* 756__localver = $(sort $(wildcard $(___localver))) 757# skip backup files (containing '~') 758_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) 759 760localver = $(subst $(space),, \ 761 $(shell cat /dev/null $(_localver)) \ 762 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 763 764# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 765# and if the SCM is know a tag from the SCM is appended. 766# The appended tag is determinded by the SCM used. 767# 768# Currently, only git is supported. 769# Other SCMs can edit scripts/setlocalversion and add the appropriate 770# checks as needed. 771ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO 772 _localver-auto = $(shell $(CONFIG_SHELL) \ 773 $(srctree)/scripts/setlocalversion $(srctree)) 774 localver-auto = $(LOCALVERSION)$(_localver-auto) 775endif 776 777localver-full = $(localver)$(localver-auto) 778 779# Store (new) KERNELRELASE string in .kernelrelease 780kernelrelease = $(KERNELVERSION)$(localver-full) 781.kernelrelease: FORCE 782 $(Q)rm -f $@ 783 $(Q)echo $(kernelrelease) > $@ 784 785 786# Things we need to do before we recursively start building the kernel 787# or the modules are listed in "prepare". 788# A multi level approach is used. prepareN is processed before prepareN-1. 789# archprepare is used in arch Makefiles and when processed asm symlink, 790# version.h and scripts_basic is processed / created. 791 792# Listed in dependency order 793PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 794 795# prepare-all is deprecated, use prepare as valid replacement 796PHONY += prepare-all 797 798# prepare3 is used to check if we are building in a separate output directory, 799# and if so do: 800# 1) Check that make has not been executed in the kernel src $(srctree) 801# 2) Create the include2 directory, used for the second asm symlink 802prepare3: .kernelrelease 803ifneq ($(KBUILD_SRC),) 804 @echo ' Using $(srctree) as source for busybox' 805 $(Q)if [ -f $(srctree)/.config ]; then \ 806 echo " $(srctree) is not clean, please run 'make mrproper'";\ 807 echo " in the '$(srctree)' directory.";\ 808 /bin/false; \ 809 fi; 810 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 811 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 812endif 813 814# prepare2 creates a makefile if using a separate output directory 815prepare2: prepare3 outputmakefile 816 817prepare1: prepare2 include/config/MARKER 818ifneq ($(KBUILD_MODULES),) 819 $(Q)mkdir -p $(MODVERDIR) 820 $(Q)rm -f $(MODVERDIR)/* 821endif 822 823archprepare: prepare1 scripts_basic applets_dir 824 825prepare0: archprepare FORCE 826 $(Q)$(MAKE) $(build)=. 827 828# All the preparing.. 829prepare prepare-all: prepare0 830 831# Leave this as default for preprocessing busybox.lds.S, which is now 832# done in arch/$(ARCH)/kernel/Makefile 833 834export CPPFLAGS_busybox.lds += -P -C -U$(ARCH) 835 836# FIXME: The asm symlink changes when $(ARCH) changes. That's 837# hard to detect, but I suppose "make mrproper" is a good idea 838# before switching between archs anyway. 839 840#bbox# include/asm: 841#bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 842#bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi; 843#bbox# @ln -fsn asm-$(ARCH) $@ 844 845# Split autoconf.h into include/linux/config/* 846quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h 847 cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs include/bbconfigopts.h include/bbconfigopts_bz2.h 848quiet_cmd_gen_common_bufsiz = GEN include/common_bufsiz.h 849 cmd_gen_common_bufsiz = $(srctree)/scripts/generate_BUFSIZ.sh include/common_bufsiz.h 850quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/* 851 cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config 852#bbox# piggybacked generation of few .h files 853include/config/MARKER: scripts/basic/split-include include/autoconf.h 854 $(call cmd,split_autoconf) 855 $(call cmd,gen_bbconfigopts) 856 $(call cmd,gen_common_bufsiz) 857 @touch $@ 858 859# Generate some files 860# --------------------------------------------------------------------------- 861 862# KERNELRELEASE can change from a few different places, meaning version.h 863# needs to be updated, so this check is forced on all builds 864 865uts_len := 64 866 867define filechk_version.h 868 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 869 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 870 exit 1; \ 871 fi; \ 872 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ 873 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ 874 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ 875 ) 876endef 877 878# --------------------------------------------------------------------------- 879 880PHONY += depend dep 881depend dep: 882 @echo '*** Warning: make $@ is unnecessary now.' 883 884# --------------------------------------------------------------------------- 885# Modules 886 887ifdef _BB_DISABLED_CONFIG_MODULES 888 889# By default, build modules as well 890 891all: modules 892 893# Build modules 894 895PHONY += modules 896modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox) 897 @echo ' Building modules, stage 2.'; 898 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 899 900 901# Target to prepare building external modules 902PHONY += modules_prepare 903modules_prepare: prepare scripts 904 905# Target to install modules 906PHONY += modules_install 907modules_install: _modinst_ _modinst_post 908 909PHONY += _modinst_ 910_modinst_: 911 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 912 echo "Warning: you may need to install module-init-tools"; \ 913 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 914 sleep 1; \ 915 fi 916 @rm -rf $(MODLIB)/kernel 917 @rm -f $(MODLIB)/source 918 @mkdir -p $(MODLIB)/kernel 919 @ln -s $(srctree) $(MODLIB)/source 920 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 921 rm -f $(MODLIB)/build ; \ 922 ln -s $(objtree) $(MODLIB)/build ; \ 923 fi 924 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 925 926# If System.map exists, run depmod. This deliberately does not have a 927# dependency on System.map since that would run the dependency tree on 928# busybox. This depmod is only for convenience to give the initial 929# boot a modules.dep even before / is mounted read-write. However the 930# boot script depmod is the master version. 931ifeq "$(strip $(INSTALL_MOD_PATH))" "" 932depmod_opts := 933else 934depmod_opts := -b $(INSTALL_MOD_PATH) -r 935endif 936PHONY += _modinst_post 937_modinst_post: _modinst_ 938 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 939 940else # CONFIG_MODULES 941 942# Modules not configured 943# --------------------------------------------------------------------------- 944 945modules modules_install: FORCE 946 @echo 947 @echo "The present busybox configuration has modules disabled." 948 @echo "Type 'make config' and enable loadable module support." 949 @echo "Then build a kernel with module support enabled." 950 @echo 951 @exit 1 952 953endif # CONFIG_MODULES 954 955### 956# Cleaning is done on three levels. 957# make clean Delete most generated files 958# Leave enough to build external modules 959# make mrproper Delete the current configuration, and all generated files 960# make distclean Remove editor backup files, patch leftover files and the like 961 962# Directories & files removed with 'make clean' 963CLEAN_DIRS += $(MODVERDIR) _install 0_lib 964CLEAN_FILES += busybox busybox_unstripped* busybox.links \ 965 System.map .kernelrelease \ 966 .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map 967 968# Directories & files removed with 'make mrproper' 969MRPROPER_DIRS += include/config include2 970MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 971 include/NUM_APPLETS.h \ 972 include/common_bufsiz.h \ 973 include/autoconf.h \ 974 include/bbconfigopts.h \ 975 include/bbconfigopts_bz2.h \ 976 include/usage_compressed.h \ 977 include/applet_tables.h \ 978 include/applets.h \ 979 include/usage.h \ 980 applets/usage \ 981 .kernelrelease Module.symvers tags TAGS cscope* \ 982 busybox_old 983 984# clean - Delete most, but leave enough to build external modules 985# 986clean: rm-dirs := $(CLEAN_DIRS) 987clean: rm-files := $(CLEAN_FILES) 988clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs)) 989 990PHONY += $(clean-dirs) clean archclean 991$(clean-dirs): 992 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 993 994clean: archclean $(clean-dirs) 995 $(call cmd,rmdirs) 996 $(call cmd,rmfiles) 997 @find . $(RCS_FIND_IGNORE) \ 998 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 999 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1000 -type f -print | xargs rm -f 1001 1002PHONY += doc-clean 1003doc-clean: rm-files := docs/busybox.pod \ 1004 docs/BusyBox.html docs/busybox.1 docs/BusyBox.txt 1005doc-clean: 1006 $(call cmd,rmfiles) 1007 1008# mrproper - Delete all generated files, including .config 1009# 1010mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1011mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1012mrproper-dirs := $(addprefix _mrproper_,scripts) 1013 1014PHONY += $(mrproper-dirs) mrproper archmrproper 1015$(mrproper-dirs): 1016 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1017 1018mrproper: clean archmrproper $(mrproper-dirs) 1019 $(call cmd,rmdirs) 1020 $(call cmd,rmfiles) 1021 @find . -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f 1022 @find . -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f 1023 1024# distclean 1025# 1026PHONY += distclean 1027 1028distclean: mrproper 1029 @find $(srctree) $(RCS_FIND_IGNORE) \ 1030 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1031 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1032 -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \ 1033 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1034 -type f -print | xargs rm -f 1035 1036 1037# Packaging of the kernel to various formats 1038# --------------------------------------------------------------------------- 1039# rpm target kept for backward compatibility 1040package-dir := $(srctree)/scripts/package 1041 1042%pkg: FORCE 1043 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1044rpm: FORCE 1045 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1046 1047 1048# Brief documentation of the typical targets used 1049# --------------------------------------------------------------------------- 1050 1051boards := $(wildcard $(srctree)/configs/*_defconfig) 1052boards := $(notdir $(boards)) 1053 1054-include $(srctree)/Makefile.help 1055 1056# Documentation targets 1057# --------------------------------------------------------------------------- 1058%docs: scripts_basic FORCE 1059 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1060 1061else # KBUILD_EXTMOD 1062 1063### 1064# External module support. 1065# When building external modules the kernel used as basis is considered 1066# read-only, and no consistency checks are made and the make 1067# system is not used on the basis kernel. If updates are required 1068# in the basis kernel ordinary make commands (without M=...) must 1069# be used. 1070# 1071# The following are the only valid targets when building external 1072# modules. 1073# make M=dir clean Delete all automatically generated files 1074# make M=dir modules Make all modules in specified dir 1075# make M=dir Same as 'make M=dir modules' 1076# make M=dir modules_install 1077# Install the modules build in the module directory 1078# Assumes install directory is already created 1079 1080# We are always building modules 1081KBUILD_MODULES := 1 1082PHONY += crmodverdir 1083crmodverdir: 1084 $(Q)mkdir -p $(MODVERDIR) 1085 $(Q)rm -f $(MODVERDIR)/* 1086 1087PHONY += $(objtree)/Module.symvers 1088$(objtree)/Module.symvers: 1089 @test -e $(objtree)/Module.symvers || ( \ 1090 echo; \ 1091 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1092 echo " is missing; modules will have no dependencies and modversions."; \ 1093 echo ) 1094 1095module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1096PHONY += $(module-dirs) modules 1097$(module-dirs): crmodverdir $(objtree)/Module.symvers 1098 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1099 1100modules: $(module-dirs) 1101 @echo ' Building modules, stage 2.'; 1102 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1103 1104PHONY += modules_install 1105modules_install: _emodinst_ _emodinst_post 1106 1107install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1108PHONY += _emodinst_ 1109_emodinst_: 1110 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1111 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1112 1113# Run depmod only is we have System.map and depmod is executable 1114quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1115 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ 1116 $(DEPMOD) -ae -F System.map \ 1117 $(if $(strip $(INSTALL_MOD_PATH)), \ 1118 -b $(INSTALL_MOD_PATH) -r) \ 1119 $(KERNELRELEASE); \ 1120 fi 1121 1122PHONY += _emodinst_post 1123_emodinst_post: _emodinst_ 1124 $(call cmd,depmod) 1125 1126clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1127 1128PHONY += $(clean-dirs) clean 1129$(clean-dirs): 1130 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1131 1132clean: rm-dirs := $(MODVERDIR) 1133clean: $(clean-dirs) 1134 $(call cmd,rmdirs) 1135 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1136 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1137 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1138 -type f -print | xargs rm -f 1139 1140# Dummies... 1141PHONY += prepare scripts 1142prepare: ; 1143scripts: ; 1144endif # KBUILD_EXTMOD 1145 1146# Generate tags for editors 1147# --------------------------------------------------------------------------- 1148 1149#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1150#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1151#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1152 1153ifeq ($(src),$(obj)) 1154__srctree = 1155else 1156__srctree = $(srctree)/ 1157endif 1158 1159ifeq ($(ALLSOURCE_ARCHS),) 1160ifeq ($(ARCH),um) 1161ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1162else 1163ALLINCLUDE_ARCHS := $(ARCH) 1164endif 1165else 1166#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1167ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1168endif 1169 1170ALLSOURCE_ARCHS := $(ARCH) 1171 1172define all-sources 1173 ( find -regex '.*\.[ch]$$' ) 1174endef 1175 1176quiet_cmd_cscope-file = FILELST cscope.files 1177 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1178 1179quiet_cmd_cscope = MAKE cscope.out 1180 cmd_cscope = cscope -b 1181 1182cscope: FORCE 1183 $(call cmd,cscope-file) 1184 $(call cmd,cscope) 1185 1186quiet_cmd_TAGS = MAKE $@ 1187define cmd_TAGS 1188 rm -f $@; \ 1189 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ 1190 echo "-I __initdata,__exitdata,__acquires,__releases \ 1191 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1192 --extra=+f --c-kinds=+px"`; \ 1193 $(all-sources) | xargs etags $$ETAGSF -a 1194endef 1195 1196TAGS: FORCE 1197 $(call cmd,TAGS) 1198 1199 1200quiet_cmd_tags = MAKE $@ 1201define cmd_tags 1202 rm -f $@; \ 1203 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ 1204 echo "-I __initdata,__exitdata,__acquires,__releases \ 1205 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1206 --extra=+f --c-kinds=+px"`; \ 1207 $(all-sources) | xargs ctags $$CTAGSF -a 1208endef 1209 1210tags: FORCE 1211 $(call cmd,tags) 1212 1213 1214# Scripts to check various things for consistency 1215# --------------------------------------------------------------------------- 1216 1217includecheck: 1218 find * $(RCS_FIND_IGNORE) \ 1219 -name '*.[hcS]' -type f -print | sort \ 1220 | xargs $(PERL) -w scripts/checkincludes.pl 1221 1222versioncheck: 1223 find * $(RCS_FIND_IGNORE) \ 1224 -name '*.[hcS]' -type f -print | sort \ 1225 | xargs $(PERL) -w scripts/checkversion.pl 1226 1227namespacecheck: 1228 $(PERL) $(srctree)/scripts/namespace.pl 1229 1230endif #ifeq ($(config-targets),1) 1231endif #ifeq ($(mixed-targets),1) 1232 1233PHONY += checkstack 1234checkstack: 1235 $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \ 1236 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1237 1238kernelrelease: 1239 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ 1240 $(error kernelrelease not valid - run 'make *config' to update it)) 1241kernelversion: 1242 @echo $(KERNELVERSION) 1243 1244# Single targets 1245# --------------------------------------------------------------------------- 1246# Single targets are compatible with: 1247# - build whith mixed source and output 1248# - build with separate output dir 'make O=...' 1249# - external modules 1250# 1251# target-dir => where to store outputfile 1252# build-dir => directory in kernel source tree to use 1253 1254ifeq ($(KBUILD_EXTMOD),) 1255 build-dir = $(patsubst %/,%,$(dir $@)) 1256 target-dir = $(dir $@) 1257else 1258 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1259 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1260 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1261endif 1262 1263%.s: %.c prepare scripts FORCE 1264 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1265%.i: %.c prepare scripts FORCE 1266 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1267%.o: %.c prepare scripts FORCE 1268 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1269%.lst: %.c prepare scripts FORCE 1270 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1271%.s: %.S prepare scripts FORCE 1272 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1273%.o: %.S prepare scripts FORCE 1274 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1275 1276# Modules 1277%/: prepare scripts FORCE 1278 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1279 $(build)=$(build-dir) 1280/: prepare scripts FORCE 1281 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1282 $(build)=$(build-dir) 1283 1284%.ko: prepare scripts FORCE 1285 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1286 $(build)=$(build-dir) $(@:.ko=.o) 1287 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1288 1289# FIXME Should go into a make.lib or something 1290# =========================================================================== 1291 1292quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1293 cmd_rmdirs = rm -rf $(rm-dirs) 1294 1295quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1296 cmd_rmfiles = rm -f $(rm-files) 1297 1298 1299a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1300 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1301 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) 1302 1303quiet_cmd_as_o_S = AS $@ 1304cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1305 1306# read all saved command lines 1307 1308targets := $(wildcard $(sort $(targets))) 1309cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1310 1311ifneq ($(cmd_files),) 1312 $(cmd_files): ; # Do not try to update included dependency files 1313 include $(cmd_files) 1314endif 1315 1316# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1317# Usage: 1318# $(Q)$(MAKE) $(clean)=dir 1319clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1320 1321endif # skip-makefile 1322 1323PHONY += FORCE 1324FORCE: 1325 1326-include $(srctree)/Makefile.custom 1327 1328# Declare the contents of the .PHONY variable as phony. We keep that 1329# information in a variable se we can use it in if_changed and friends. 1330.PHONY: $(PHONY) 1331