1include ../.config 2 3VERSION = 1 4PATCHLEVEL = 17 5SUBLEVEL = 4 6EXTRAVERSION = 7NAME = Unnamed 8 9# *DOCUMENTATION* 10# To see a list of typical targets execute "make help" 11# More info can be located in ./README 12# Comments in this file are targeted only to the developer, do not 13# expect to learn how to build the kernel reading this file. 14 15# Do not print "Entering directory ..." 16MAKEFLAGS += --no-print-directory 17 18# We are using a recursive build, so we need to do a little thinking 19# to get the ordering right. 20# 21# Most importantly: sub-Makefiles should only ever modify files in 22# their own directory. If in some directory we have a dependency on 23# a file in another dir (which doesn't happen often, but it's often 24# unavoidable when linking the built-in.o targets which finally 25# turn into busybox), we will call a sub make in that other dir, and 26# after that we are sure that everything which is in that other dir 27# is now up to date. 28# 29# The only cases where we need to modify files which have global 30# effects are thus separated out and done before the recursive 31# descending is started. They are now explicitly listed as the 32# prepare rule. 33 34# To put more focus on warnings, be less verbose as default 35# Use 'make V=1' to see the full commands 36 37ifdef V 38 ifeq ("$(origin V)", "command line") 39 KBUILD_VERBOSE = $(V) 40 endif 41endif 42ifndef KBUILD_VERBOSE 43 KBUILD_VERBOSE = 0 44endif 45 46# Call sparse as part of compilation of C files 47# Use 'make C=1' to enable sparse checking 48 49ifdef C 50 ifeq ("$(origin C)", "command line") 51 KBUILD_CHECKSRC = $(C) 52 endif 53endif 54ifndef KBUILD_CHECKSRC 55 KBUILD_CHECKSRC = 0 56endif 57 58# Use make M=dir to specify directory of external module to build 59# Old syntax make ... SUBDIRS=$PWD is still supported 60# Setting the environment variable KBUILD_EXTMOD take precedence 61ifdef SUBDIRS 62 KBUILD_EXTMOD ?= $(SUBDIRS) 63endif 64ifdef M 65 ifeq ("$(origin M)", "command line") 66 KBUILD_EXTMOD := $(M) 67 endif 68endif 69 70 71ifeq ($(RTCONFIG_BCMARM), y) 72CFLAGS += -DBCMARM 73endif 74 75ifeq ($(RTCONFIG_QCA), y) 76CFLAGS += -DQCA 77endif 78 79# kbuild supports saving output files in a separate directory. 80# To locate output files in a separate directory two syntaxes are supported. 81# In both cases the working directory must be the root of the kernel src. 82# 1) O= 83# Use "make O=dir/to/store/output/files/" 84# 85# 2) Set KBUILD_OUTPUT 86# Set the environment variable KBUILD_OUTPUT to point to the directory 87# where the output files shall be placed. 88# export KBUILD_OUTPUT=dir/to/store/output/files/ 89# make 90# 91# The O= assignment takes precedence over the KBUILD_OUTPUT environment 92# variable. 93 94 95# KBUILD_SRC is set on invocation of make in OBJ directory 96# KBUILD_SRC is not intended to be used by the regular user (for now) 97ifeq ($(KBUILD_SRC),) 98 99# OK, Make called in directory where kernel src resides 100# Do we want to locate output files in a separate directory? 101ifdef O 102 ifeq ("$(origin O)", "command line") 103 KBUILD_OUTPUT := $(O) 104 endif 105endif 106 107# That's our default target when none is given on the command line 108PHONY := _all 109_all: 110 111ifneq ($(KBUILD_OUTPUT),) 112# Invoke a second make in the output directory, passing relevant variables 113# check that the output directory actually exists 114saved-output := $(KBUILD_OUTPUT) 115KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 116$(if $(KBUILD_OUTPUT),, \ 117 $(error output directory "$(saved-output)" does not exist)) 118 119PHONY += $(MAKECMDGOALS) 120 121$(filter-out _all,$(MAKECMDGOALS)) _all: 122 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 123 KBUILD_SRC=$(CURDIR) \ 124 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ 125 126# Leave processing to above invocation of make 127skip-makefile := 1 128endif # ifneq ($(KBUILD_OUTPUT),) 129endif # ifeq ($(KBUILD_SRC),) 130 131# We process the rest of the Makefile if this is the final invocation of make 132ifeq ($(skip-makefile),) 133 134# If building an external module we do not care about the all: rule 135# but instead _all depend on modules 136PHONY += all 137ifeq ($(KBUILD_EXTMOD),) 138_all: all 139else 140_all: modules 141endif 142 143srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 144TOPDIR := $(srctree) 145# FIXME - TOPDIR is obsolete, use srctree/objtree 146objtree := $(CURDIR) 147src := $(srctree) 148obj := $(objtree) 149 150VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 151 152export srctree objtree VPATH TOPDIR 153 154 155# Cross compiling and selecting different set of gcc/bin-utils 156# --------------------------------------------------------------------------- 157# 158# When performing cross compilation for other architectures ARCH shall be set 159# to the target architecture. (See arch/* for the possibilities). 160# ARCH can be set during invocation of make: 161# make ARCH=ia64 162# Another way is to have ARCH set in the environment. 163# The default ARCH is the host where make is executed. 164 165# CROSS_COMPILE specify the prefix used for all executables used 166# during compilation. Only gcc and related bin-utils executables 167# are prefixed with $(CROSS_COMPILE). 168# CROSS_COMPILE can be set on the command line 169# make CROSS_COMPILE=ia64-linux- 170# Alternatively CROSS_COMPILE can be set in the environment. 171# Default value for CROSS_COMPILE is not to prefix executables 172# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 173 174CROSS_COMPILE ?= 175# bbox: we may have CONFIG_CROSS_COMPILER_PREFIX in .config, 176# and it has not been included yet... thus using an awkward syntax. 177ifeq ($(CROSS_COMPILE),) 178CROSS_COMPILE := $(shell grep ^CONFIG_CROSS_COMPILER_PREFIX .config 2>/dev/null) 179CROSS_COMPILE := $(subst CONFIG_CROSS_COMPILER_PREFIX=,,$(CROSS_COMPILE)) 180CROSS_COMPILE := $(subst ",,$(CROSS_COMPILE)) 181#") 182endif 183 184# SUBARCH tells the usermode build what the underlying arch is. That is set 185# first, and if a usermode build is happening, the "ARCH=um" on the command 186# line overrides the setting of ARCH below. If a native build is happening, 187# then ARCH is assigned, getting whatever value it gets normally, and 188# SUBARCH is subsequently ignored. 189 190ifneq ($(CROSS_COMPILE),) 191SUBARCH := $(shell echo $(CROSS_COMPILE) | cut -d- -f1) 192else 193SUBARCH := $(shell uname -m) 194endif 195SUBARCH := $(shell echo $(SUBARCH) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 196 -e s/arm.*/arm/ -e s/sa110/arm/ \ 197 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 198 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) 199 200ARCH ?= $(SUBARCH) 201 202# Architecture as present in compile.h 203UTS_MACHINE := $(ARCH) 204 205# SHELL used by kbuild 206CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 207 else if [ -x /bin/bash ]; then echo /bin/bash; \ 208 else echo sh; fi ; fi) 209 210# Decide whether to build built-in, modular, or both. 211# Normally, just do built-in. 212 213KBUILD_MODULES := 214KBUILD_BUILTIN := 1 215 216# If we have only "make modules", don't compile built-in objects. 217# When we're building modules with modversions, we need to consider 218# the built-in objects during the descend as well, in order to 219# make sure the checksums are uptodate before we record them. 220 221ifeq ($(MAKECMDGOALS),modules) 222 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 223endif 224 225# If we have "make <whatever> modules", compile modules 226# in addition to whatever we do anyway. 227# Just "make" or "make all" shall build modules as well 228 229ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 230 KBUILD_MODULES := 1 231endif 232 233ifeq ($(MAKECMDGOALS),) 234 KBUILD_MODULES := 1 235endif 236 237export KBUILD_MODULES KBUILD_BUILTIN 238export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 239 240# Beautify output 241# --------------------------------------------------------------------------- 242# 243# Normally, we echo the whole command before executing it. By making 244# that echo $($(quiet)$(cmd)), we now have the possibility to set 245# $(quiet) to choose other forms of output instead, e.g. 246# 247# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 248# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 249# 250# If $(quiet) is empty, the whole command will be printed. 251# If it is set to "quiet_", only the short version will be printed. 252# If it is set to "silent_", nothing wil be printed at all, since 253# the variable $(silent_cmd_cc_o_c) doesn't exist. 254# 255# A simple variant is to prefix commands with $(Q) - that's useful 256# for commands that shall be hidden in non-verbose mode. 257# 258# $(Q)ln $@ :< 259# 260# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 261# If KBUILD_VERBOSE equals 1 then the above command is displayed. 262 263ifeq ($(KBUILD_VERBOSE),1) 264 quiet = 265 Q = 266else 267 quiet=quiet_ 268 Q = @ 269endif 270 271# If the user is running make -s (silent mode), suppress echoing of 272# commands 273 274ifneq ($(findstring s,$(MAKEFLAGS)),) 275 quiet=silent_ 276endif 277 278export quiet Q KBUILD_VERBOSE 279 280 281# Look for make include files relative to root of kernel src 282MAKEFLAGS += --include-dir=$(srctree) 283 284HOSTCC = gcc 285HOSTCXX = g++ 286HOSTCFLAGS := 287HOSTCXXFLAGS := 288# We need some generic definitions 289include $(srctree)/scripts/Kbuild.include 290 291HOSTCFLAGS += $(call hostcc-option,-Wall -Wstrict-prototypes -O2 -fomit-frame-pointer,) 292HOSTCXXFLAGS += -O2 293 294# For maximum performance (+ possibly random breakage, uncomment 295# the following) 296 297MAKEFLAGS += -rR 298 299# Make variables (CC, etc...) 300 301AS = $(CROSS_COMPILE)as 302CC = $(CROSS_COMPILE)gcc 303LD = $(CC) -nostdlib 304CPP = $(CC) -E 305AR = $(CROSS_COMPILE)ar 306NM = $(CROSS_COMPILE)nm 307STRIP = $(CROSS_COMPILE)strip 308OBJCOPY = $(CROSS_COMPILE)objcopy 309OBJDUMP = $(CROSS_COMPILE)objdump 310AWK = awk 311GENKSYMS = scripts/genksyms/genksyms 312DEPMOD = /sbin/depmod 313KALLSYMS = scripts/kallsyms 314PERL = perl 315CHECK = sparse 316 317CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 318MODFLAGS = -DMODULE 319CFLAGS_MODULE = $(MODFLAGS) 320AFLAGS_MODULE = $(MODFLAGS) 321LDFLAGS_MODULE = -r 322CFLAGS_KERNEL = 323AFLAGS_KERNEL = 324 325 326# Use LINUXINCLUDE when you must reference the include/ directory. 327# Needed to be compatible with the O= option 328CFLAGS := $(CFLAGS) 329# Added only to final link stage of busybox binary 330CFLAGS_busybox := $(CFLAGS_busybox) 331CPPFLAGS := $(CPPFLAGS) 332AFLAGS := $(AFLAGS) 333LDFLAGS := $(LDFLAGS) 334LDLIBS := 335 336# Read KERNELRELEASE from .kernelrelease (if it exists) 337KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) 338KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 339 340export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ 341 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ 342 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ 343 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 344 345export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 346export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 347export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 348export FLTFLAGS 349 350# When compiling out-of-tree modules, put MODVERDIR in the module 351# tree rather than in the kernel tree. The kernel tree might 352# even be read-only. 353export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 354 355# Files to ignore in find ... statements 356 357RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 358export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 359 360# =========================================================================== 361# Rules shared between *config targets and build targets 362 363# Basic helpers built in scripts/ 364PHONY += scripts_basic 365scripts_basic: 366 $(Q)$(MAKE) $(build)=scripts/basic 367 368# To avoid any implicit rule to kick in, define an empty command. 369scripts/basic/%: scripts_basic ; 370 371# This target generates Kbuild's and Config.in's from *.c files 372PHONY += gen_build_files 373gen_build_files: $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) 374 $(Q)$(srctree)/scripts/gen_build_files.sh $(srctree) $(objtree) 375 376# bbox: we have helpers in applets/ 377# we depend on scripts_basic, since scripts/basic/fixdep 378# must be built before any other host prog 379PHONY += applets_dir 380applets_dir: scripts_basic gen_build_files 381 $(Q)$(MAKE) $(build)=applets 382 383applets/%: applets_dir ; 384 385PHONY += outputmakefile 386# outputmakefile generates a Makefile in the output directory, if using a 387# separate output directory. This allows convenient use of make in the 388# output directory. 389outputmakefile: 390ifneq ($(KBUILD_SRC),) 391 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 392 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 393endif 394 395# To make sure we do not include .config for any of the *config targets 396# catch them early, and hand them over to scripts/kconfig/Makefile 397# It is allowed to specify more targets when calling make, including 398# mixing *config targets and build targets. 399# For example 'make oldconfig all'. 400# Detect when mixed targets is specified, and make a second invocation 401# of make so .config is not included in this case either (for *config). 402 403no-dot-config-targets := clean mrproper distclean \ 404 cscope TAGS tags help %docs 405#bbox# check% is removed from above 406 407config-targets := 0 408mixed-targets := 0 409dot-config := 1 410 411ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 412 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 413 dot-config := 0 414 endif 415endif 416 417ifeq ($(KBUILD_EXTMOD),) 418 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 419 config-targets := 1 420 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 421 mixed-targets := 1 422 endif 423 endif 424endif 425 426ifeq ($(mixed-targets),1) 427# =========================================================================== 428# We're called with mixed targets (*config and build targets). 429# Handle them one by one. 430 431%:: FORCE 432 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 433 434else 435ifeq ($(config-targets),1) 436# =========================================================================== 437# *config targets only - make sure prerequisites are updated, and descend 438# in scripts/kconfig to make the *config target 439 440# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 441# KBUILD_DEFCONFIG may point out an alternative default configuration 442# used for 'make defconfig' 443-include $(srctree)/arch/$(ARCH)/Makefile 444export KBUILD_DEFCONFIG 445 446config: scripts_basic outputmakefile gen_build_files FORCE 447 $(Q)mkdir -p include 448 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 449 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease 450 451%config: scripts_basic outputmakefile gen_build_files FORCE 452 $(Q)mkdir -p include 453 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 454 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease 455 456else 457# =========================================================================== 458# Build targets only - this includes busybox, arch specific targets, clean 459# targets and others. In general all targets except *config targets. 460 461ifeq ($(KBUILD_EXTMOD),) 462# Additional helpers built in scripts/ 463# Carefully list dependencies so we do not try to build scripts twice 464# in parallel 465PHONY += scripts 466scripts: gen_build_files scripts_basic include/config/MARKER 467 $(Q)$(MAKE) $(build)=$(@) 468 469scripts_basic: include/autoconf.h 470 471# Objects we will link into busybox / subdirs we need to visit 472core-y := \ 473 applets/ \ 474 475libs-y := \ 476 archival/ \ 477 archival/libunarchive/ \ 478 console-tools/ \ 479 coreutils/ \ 480 coreutils/libcoreutils/ \ 481 debianutils/ \ 482 e2fsprogs/old_e2fsprogs/ \ 483 e2fsprogs/old_e2fsprogs/e2p/ \ 484 e2fsprogs/old_e2fsprogs/ext2fs/ \ 485 editors/ \ 486 findutils/ \ 487 init/ \ 488 libbb/ \ 489 libpwdgrp/ \ 490 loginutils/ \ 491 mailutils/ \ 492 miscutils/ \ 493 modutils/ \ 494 networking/ \ 495 networking/libiproute/ \ 496 networking/udhcp/ \ 497 printutils/ \ 498 procps/ \ 499 runit/ \ 500 selinux/ \ 501 shell/ \ 502 sysklogd/ \ 503 util-linux/ \ 504 util-linux/volume_id/ \ 505 506endif # KBUILD_EXTMOD 507 508ifeq ($(dot-config),1) 509# In this section, we need .config 510 511# Read in dependencies to all Kconfig* files, make sure to run 512# oldconfig if changes are detected. 513-include .kconfig.d 514 515-include .config 516 517# If .config needs to be updated, it will be done via the dependency 518# that autoconf has on .config. 519# To avoid any implicit rule to kick in, define an empty command 520.config .kconfig.d: ; 521 522# Now we can define CFLAGS etc according to .config 523include $(srctree)/Makefile.flags 524 525# If .config is newer than include/autoconf.h, someone tinkered 526# with it and forgot to run make oldconfig. 527# If kconfig.d is missing then we are probarly in a cleaned tree so 528# we execute the config step to be sure to catch updated Kconfig files 529include/autoconf.h: .kconfig.d .config $(wildcard $(srctree)/*/*.c) $(wildcard $(srctree)/*/*/*.c) | gen_build_files 530 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 531 532include/usage.h: gen_build_files 533 534else 535# Dummy target needed, because used as prerequisite 536include/autoconf.h: ; 537endif 538 539# The all: target is the default when no target is given on the 540# command line. 541# This allow a user to issue only 'make' to build a kernel including modules 542# Defaults busybox but it is usually overridden in the arch makefile 543all: busybox doc 544 545-include $(srctree)/arch/$(ARCH)/Makefile 546 547# arch Makefile may override CC so keep this after arch Makefile is included 548#bbox# NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 549CHECKFLAGS += $(NOSTDINC_FLAGS) 550 551# Default kernel image to build when no specific target is given. 552# KBUILD_IMAGE may be overruled on the commandline or 553# set in the environment 554# Also any assignments in arch/$(ARCH)/Makefile take precedence over 555# this default value 556export KBUILD_IMAGE ?= busybox 557 558# 559# INSTALL_PATH specifies where to place the updated kernel and system map 560# images. Default is /boot, but you can set it to other values 561export INSTALL_PATH ?= /boot 562 563# 564# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 565# relocations required by build roots. This is not defined in the 566# makefile but the arguement can be passed to make if needed. 567# 568 569MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 570export MODLIB 571 572 573ifeq ($(KBUILD_EXTMOD),) 574busybox-dirs := $(patsubst %/,%,$(filter %/, $(core-y) $(core-m) $(libs-y) $(libs-m))) 575 576busybox-alldirs := $(sort $(busybox-dirs) $(patsubst %/,%,$(filter %/, \ 577 $(core-n) $(core-) $(libs-n) $(libs-) \ 578 ))) 579 580core-y := $(patsubst %/, %/built-in.o, $(core-y)) 581libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 582libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 583libs-y := $(libs-y1) $(libs-y2) 584 585# Build busybox 586# --------------------------------------------------------------------------- 587# busybox is build from the objects selected by $(busybox-init) and 588# $(busybox-main). Most are built-in.o files from top-level directories 589# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 590# Ordering when linking is important, and $(busybox-init) must be first. 591# 592# busybox 593# ^ 594# | 595# +-< $(busybox-init) 596# | +--< init/version.o + more 597# | 598# +--< $(busybox-main) 599# | +--< driver/built-in.o mm/built-in.o + more 600# | 601# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 602# 603# busybox version (uname -v) cannot be updated during normal 604# descending-into-subdirs phase since we do not yet know if we need to 605# update busybox. 606# Therefore this step is delayed until just before final link of busybox - 607# except in the kallsyms case where it is done just before adding the 608# symbols to the kernel. 609# 610# System.map is generated to document addresses of all kernel symbols 611 612busybox-all := $(core-y) $(libs-y) 613 614# Rule to link busybox - also used during CONFIG_KALLSYMS 615# May be overridden by arch/$(ARCH)/Makefile 616quiet_cmd_busybox__ ?= LINK $@ 617 cmd_busybox__ ?= $(srctree)/scripts/trylink \ 618 "$@" \ 619 "$(CC)" \ 620 "$(CFLAGS) $(CFLAGS_busybox)" \ 621 "$(LDFLAGS) $(EXTRA_LDFLAGS)" \ 622 "$(core-y)" \ 623 "$(libs-y)" \ 624 "$(LDLIBS)" 625 626# Generate System.map 627quiet_cmd_sysmap = SYSMAP 628 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 629 630# Link of busybox 631# If CONFIG_KALLSYMS is set .version is already updated 632# Generate System.map and verify that the content is consistent 633# Use + in front of the busybox_version rule to silent warning with make -j2 634# First command is ':' to allow us to use + in front of the rule 635define rule_busybox__ 636 : 637 $(call cmd,busybox__) 638 $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd 639endef 640 641 642ifdef CONFIG_KALLSYMS 643# Generate section listing all symbols and add it into busybox $(kallsyms.o) 644# It's a three stage process: 645# o .tmp_busybox1 has all symbols and sections, but __kallsyms is 646# empty 647# Running kallsyms on that gives us .tmp_kallsyms1.o with 648# the right size - busybox version (uname -v) is updated during this step 649# o .tmp_busybox2 now has a __kallsyms section of the right size, 650# but due to the added section, some addresses have shifted. 651# From here, we generate a correct .tmp_kallsyms2.o 652# o The correct .tmp_kallsyms2.o is linked into the final busybox. 653# o Verify that the System.map from busybox matches the map from 654# .tmp_busybox2, just in case we did not generate kallsyms correctly. 655# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 656# .tmp_busybox3 and .tmp_kallsyms3.o. This is only meant as a 657# temporary bypass to allow the kernel to be built while the 658# maintainers work out what went wrong with kallsyms. 659 660ifdef CONFIG_KALLSYMS_EXTRA_PASS 661last_kallsyms := 3 662else 663last_kallsyms := 2 664endif 665 666kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 667 668define verify_kallsyms 669 $(Q)$(if $($(quiet)cmd_sysmap), \ 670 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 671 $(cmd_sysmap) .tmp_busybox$(last_kallsyms) .tmp_System.map 672 $(Q)cmp -s System.map .tmp_System.map || \ 673 (echo Inconsistent kallsyms data; \ 674 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 675 rm .tmp_kallsyms* ; /bin/false ) 676endef 677 678# Update busybox version before link 679# Use + in front of this rule to silent warning about make -j1 680# First command is ':' to allow us to use + in front of this rule 681cmd_ksym_ld = $(cmd_busybox__) 682define rule_ksym_ld 683 : 684 +$(call cmd,busybox_version) 685 $(call cmd,busybox__) 686 $(Q)echo 'cmd_$@ := $(cmd_busybox__)' > $(@D)/.$(@F).cmd 687endef 688 689# Generate .S file with all kernel symbols 690quiet_cmd_kallsyms = KSYM $@ 691 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 692 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 693 694.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 695 $(call if_changed_dep,as_o_S) 696 697.tmp_kallsyms%.S: .tmp_busybox% $(KALLSYMS) 698 $(call cmd,kallsyms) 699 700# .tmp_busybox1 must be complete except kallsyms, so update busybox version 701.tmp_busybox1: $(busybox-lds) $(busybox-all) FORCE 702 $(call if_changed_rule,ksym_ld) 703 704.tmp_busybox2: $(busybox-lds) $(busybox-all) .tmp_kallsyms1.o FORCE 705 $(call if_changed,busybox__) 706 707.tmp_busybox3: $(busybox-lds) $(busybox-all) .tmp_kallsyms2.o FORCE 708 $(call if_changed,busybox__) 709 710# Needs to visit scripts/ before $(KALLSYMS) can be used. 711$(KALLSYMS): scripts ; 712 713# Generate some data for debugging strange kallsyms problems 714debug_kallsyms: .tmp_map$(last_kallsyms) 715 716.tmp_map%: .tmp_busybox% FORCE 717 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 718 719.tmp_map3: .tmp_map2 720 721.tmp_map2: .tmp_map1 722 723endif # ifdef CONFIG_KALLSYMS 724 725# busybox image - including updated kernel symbols 726busybox_unstripped: $(busybox-all) FORCE 727 $(call if_changed_rule,busybox__) 728 $(Q)rm -f .old_version 729 730busybox: busybox_unstripped 731ifeq ($(SKIP_STRIP),y) 732 $(Q)cp $< $@ 733else 734 $(Q)$(STRIP) -s --remove-section=.note --remove-section=.comment \ 735 busybox_unstripped -o $@ 736# strip is confused by PIE executable and does not set exec bits 737 $(Q)chmod a+x $@ 738endif 739 740# The actual objects are generated when descending, 741# make sure no implicit rule kicks in 742$(sort $(busybox-all)): $(busybox-dirs) ; 743 744# Handle descending into subdirectories listed in $(busybox-dirs) 745# Preset locale variables to speed up the build process. Limit locale 746# tweaks to this spot to avoid wrong language settings when running 747# make menuconfig etc. 748# Error messages still appears in the original language 749 750PHONY += $(busybox-dirs) 751$(busybox-dirs): prepare scripts 752 $(Q)$(MAKE) $(build)=$@ 753 754# Build the kernel release string 755# The KERNELRELEASE is stored in a file named .kernelrelease 756# to be used when executing for example make install or make modules_install 757# 758# Take the contents of any files called localversion* and the config 759# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. 760# LOCALVERSION from the command line override all of this 761 762nullstring := 763space := $(nullstring) # end of line 764 765___localver = $(objtree)/localversion* $(srctree)/localversion* 766__localver = $(sort $(wildcard $(___localver))) 767# skip backup files (containing '~') 768_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) 769 770localver = $(subst $(space),, \ 771 $(shell cat /dev/null $(_localver)) \ 772 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 773 774# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 775# and if the SCM is know a tag from the SCM is appended. 776# The appended tag is determinded by the SCM used. 777# 778# Currently, only git is supported. 779# Other SCMs can edit scripts/setlocalversion and add the appropriate 780# checks as needed. 781ifdef _BB_DISABLED_CONFIG_LOCALVERSION_AUTO 782 _localver-auto = $(shell $(CONFIG_SHELL) \ 783 $(srctree)/scripts/setlocalversion $(srctree)) 784 localver-auto = $(LOCALVERSION)$(_localver-auto) 785endif 786 787localver-full = $(localver)$(localver-auto) 788 789# Store (new) KERNELRELASE string in .kernelrelease 790kernelrelease = $(KERNELVERSION)$(localver-full) 791.kernelrelease: FORCE 792 $(Q)rm -f $@ 793 $(Q)echo $(kernelrelease) > $@ 794 795 796# Things we need to do before we recursively start building the kernel 797# or the modules are listed in "prepare". 798# A multi level approach is used. prepareN is processed before prepareN-1. 799# archprepare is used in arch Makefiles and when processed asm symlink, 800# version.h and scripts_basic is processed / created. 801 802# Listed in dependency order 803PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 804 805# prepare-all is deprecated, use prepare as valid replacement 806PHONY += prepare-all 807 808# prepare3 is used to check if we are building in a separate output directory, 809# and if so do: 810# 1) Check that make has not been executed in the kernel src $(srctree) 811# 2) Create the include2 directory, used for the second asm symlink 812prepare3: .kernelrelease 813ifneq ($(KBUILD_SRC),) 814 @echo ' Using $(srctree) as source for busybox' 815 $(Q)if [ -f $(srctree)/.config ]; then \ 816 echo " $(srctree) is not clean, please run 'make mrproper'";\ 817 echo " in the '$(srctree)' directory.";\ 818 /bin/false; \ 819 fi; 820 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 821 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 822endif 823 824# prepare2 creates a makefile if using a separate output directory 825prepare2: prepare3 outputmakefile 826 827prepare1: prepare2 include/config/MARKER 828ifneq ($(KBUILD_MODULES),) 829 $(Q)mkdir -p $(MODVERDIR) 830 $(Q)rm -f $(MODVERDIR)/* 831endif 832 833archprepare: prepare1 scripts_basic applets_dir 834 835prepare0: archprepare FORCE 836 $(Q)$(MAKE) $(build)=. 837 838# All the preparing.. 839prepare prepare-all: prepare0 840 841# Leave this as default for preprocessing busybox.lds.S, which is now 842# done in arch/$(ARCH)/kernel/Makefile 843 844export CPPFLAGS_busybox.lds += -P -C -U$(ARCH) 845 846# FIXME: The asm symlink changes when $(ARCH) changes. That's 847# hard to detect, but I suppose "make mrproper" is a good idea 848# before switching between archs anyway. 849 850#bbox# include/asm: 851#bbox# @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 852#bbox# $(Q)if [ ! -d include ]; then mkdir -p include; fi; 853#bbox# @ln -fsn asm-$(ARCH) $@ 854 855# Split autoconf.h into include/linux/config/* 856quiet_cmd_gen_bbconfigopts = GEN include/bbconfigopts.h 857 cmd_gen_bbconfigopts = $(srctree)/scripts/mkconfigs > include/bbconfigopts.h 858quiet_cmd_split_autoconf = SPLIT include/autoconf.h -> include/config/* 859 cmd_split_autoconf = scripts/basic/split-include include/autoconf.h include/config 860#bbox# piggybacked generation of few .h files 861include/config/MARKER: scripts/basic/split-include include/autoconf.h 862 $(call cmd,split_autoconf) 863 $(call cmd,gen_bbconfigopts) 864 @touch $@ 865 866# Generate some files 867# --------------------------------------------------------------------------- 868 869# KERNELRELEASE can change from a few different places, meaning version.h 870# needs to be updated, so this check is forced on all builds 871 872uts_len := 64 873 874define filechk_version.h 875 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 876 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 877 exit 1; \ 878 fi; \ 879 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ 880 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ 881 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ 882 ) 883endef 884 885# --------------------------------------------------------------------------- 886 887PHONY += depend dep 888depend dep: 889 @echo '*** Warning: make $@ is unnecessary now.' 890 891# --------------------------------------------------------------------------- 892# Modules 893 894ifdef _BB_DISABLED_CONFIG_MODULES 895 896# By default, build modules as well 897 898all: modules 899 900# Build modules 901 902PHONY += modules 903modules: $(busybox-dirs) $(if $(KBUILD_BUILTIN),busybox) 904 @echo ' Building modules, stage 2.'; 905 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 906 907 908# Target to prepare building external modules 909PHONY += modules_prepare 910modules_prepare: prepare scripts 911 912# Target to install modules 913PHONY += modules_install 914modules_install: _modinst_ _modinst_post 915 916PHONY += _modinst_ 917_modinst_: 918 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 919 echo "Warning: you may need to install module-init-tools"; \ 920 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 921 sleep 1; \ 922 fi 923 @rm -rf $(MODLIB)/kernel 924 @rm -f $(MODLIB)/source 925 @mkdir -p $(MODLIB)/kernel 926 @ln -s $(srctree) $(MODLIB)/source 927 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 928 rm -f $(MODLIB)/build ; \ 929 ln -s $(objtree) $(MODLIB)/build ; \ 930 fi 931 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 932 933# If System.map exists, run depmod. This deliberately does not have a 934# dependency on System.map since that would run the dependency tree on 935# busybox. This depmod is only for convenience to give the initial 936# boot a modules.dep even before / is mounted read-write. However the 937# boot script depmod is the master version. 938ifeq "$(strip $(INSTALL_MOD_PATH))" "" 939depmod_opts := 940else 941depmod_opts := -b $(INSTALL_MOD_PATH) -r 942endif 943PHONY += _modinst_post 944_modinst_post: _modinst_ 945 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 946 947else # CONFIG_MODULES 948 949# Modules not configured 950# --------------------------------------------------------------------------- 951 952modules modules_install: FORCE 953 @echo 954 @echo "The present busybox configuration has modules disabled." 955 @echo "Type 'make config' and enable loadable module support." 956 @echo "Then build a kernel with module support enabled." 957 @echo 958 @exit 1 959 960endif # CONFIG_MODULES 961 962### 963# Cleaning is done on three levels. 964# make clean Delete most generated files 965# Leave enough to build external modules 966# make mrproper Delete the current configuration, and all generated files 967# make distclean Remove editor backup files, patch leftover files and the like 968 969# Directories & files removed with 'make clean' 970CLEAN_DIRS += $(MODVERDIR) _install 0_lib 971CLEAN_FILES += busybox busybox_unstripped* busybox.links \ 972 System.map .kernelrelease \ 973 .tmp_kallsyms* .tmp_version .tmp_busybox* .tmp_System.map 974 975# Directories & files removed with 'make mrproper' 976MRPROPER_DIRS += include/config include2 977MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 978 include/autoconf.h \ 979 include/bbconfigopts.h \ 980 include/usage_compressed.h \ 981 include/applet_tables.h \ 982 applets/usage \ 983 .kernelrelease Module.symvers tags TAGS cscope* \ 984 busybox_old 985 986# clean - Delete most, but leave enough to build external modules 987# 988clean: rm-dirs := $(CLEAN_DIRS) 989clean: rm-files := $(CLEAN_FILES) 990clean-dirs := $(addprefix _clean_,$(srctree) $(busybox-alldirs)) 991 992PHONY += $(clean-dirs) clean archclean 993$(clean-dirs): 994 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 995 996clean: archclean $(clean-dirs) 997 $(call cmd,rmdirs) 998 $(call cmd,rmfiles) 999 @find . $(RCS_FIND_IGNORE) \ 1000 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1001 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1002 -type f -print | xargs rm -f 1003 1004PHONY += doc-clean 1005doc-clean: rm-files := docs/busybox.pod \ 1006 docs/BusyBox.html docs/BusyBox.1 docs/BusyBox.txt 1007doc-clean: 1008 $(call cmd,rmfiles) 1009 1010# mrproper - Delete all generated files, including .config 1011# 1012mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1013mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1014mrproper-dirs := $(addprefix _mrproper_,scripts) 1015 1016PHONY += $(mrproper-dirs) mrproper archmrproper 1017$(mrproper-dirs): 1018 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1019 1020mrproper: clean archmrproper $(mrproper-dirs) 1021 $(call cmd,rmdirs) 1022 $(call cmd,rmfiles) 1023 @find -name Config.src | sed 's/.src$$/.in/' | xargs -r rm -f 1024 @find -name Kbuild.src | sed 's/.src$$//' | xargs -r rm -f 1025 1026# distclean 1027# 1028PHONY += distclean 1029 1030distclean: mrproper 1031 @find $(srctree) $(RCS_FIND_IGNORE) \ 1032 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1033 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1034 -o -name '.*.rej' -o -name '*.tmp' -o -size 0 \ 1035 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1036 -type f -print | xargs rm -f 1037 1038 1039# Packaging of the kernel to various formats 1040# --------------------------------------------------------------------------- 1041# rpm target kept for backward compatibility 1042package-dir := $(srctree)/scripts/package 1043 1044%pkg: FORCE 1045 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1046rpm: FORCE 1047 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1048 1049 1050# Brief documentation of the typical targets used 1051# --------------------------------------------------------------------------- 1052 1053boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1054boards := $(notdir $(boards)) 1055 1056-include $(srctree)/Makefile.help 1057 1058# Documentation targets 1059# --------------------------------------------------------------------------- 1060%docs: scripts_basic FORCE 1061 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1062 1063else # KBUILD_EXTMOD 1064 1065### 1066# External module support. 1067# When building external modules the kernel used as basis is considered 1068# read-only, and no consistency checks are made and the make 1069# system is not used on the basis kernel. If updates are required 1070# in the basis kernel ordinary make commands (without M=...) must 1071# be used. 1072# 1073# The following are the only valid targets when building external 1074# modules. 1075# make M=dir clean Delete all automatically generated files 1076# make M=dir modules Make all modules in specified dir 1077# make M=dir Same as 'make M=dir modules' 1078# make M=dir modules_install 1079# Install the modules build in the module directory 1080# Assumes install directory is already created 1081 1082# We are always building modules 1083KBUILD_MODULES := 1 1084PHONY += crmodverdir 1085crmodverdir: 1086 $(Q)mkdir -p $(MODVERDIR) 1087 $(Q)rm -f $(MODVERDIR)/* 1088 1089PHONY += $(objtree)/Module.symvers 1090$(objtree)/Module.symvers: 1091 @test -e $(objtree)/Module.symvers || ( \ 1092 echo; \ 1093 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1094 echo " is missing; modules will have no dependencies and modversions."; \ 1095 echo ) 1096 1097module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1098PHONY += $(module-dirs) modules 1099$(module-dirs): crmodverdir $(objtree)/Module.symvers 1100 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1101 1102modules: $(module-dirs) 1103 @echo ' Building modules, stage 2.'; 1104 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1105 1106PHONY += modules_install 1107modules_install: _emodinst_ _emodinst_post 1108 1109install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1110PHONY += _emodinst_ 1111_emodinst_: 1112 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1113 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1114 1115# Run depmod only is we have System.map and depmod is executable 1116quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1117 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ 1118 $(DEPMOD) -ae -F System.map \ 1119 $(if $(strip $(INSTALL_MOD_PATH)), \ 1120 -b $(INSTALL_MOD_PATH) -r) \ 1121 $(KERNELRELEASE); \ 1122 fi 1123 1124PHONY += _emodinst_post 1125_emodinst_post: _emodinst_ 1126 $(call cmd,depmod) 1127 1128clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1129 1130PHONY += $(clean-dirs) clean 1131$(clean-dirs): 1132 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1133 1134clean: rm-dirs := $(MODVERDIR) 1135clean: $(clean-dirs) 1136 $(call cmd,rmdirs) 1137 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1138 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1139 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1140 -type f -print | xargs rm -f 1141 1142help: 1143 @echo ' Building external modules.' 1144 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1145 @echo '' 1146 @echo ' modules - default target, build the module(s)' 1147 @echo ' modules_install - install the module' 1148 @echo ' clean - remove generated files in module directory only' 1149 @echo '' 1150 1151# Dummies... 1152PHONY += prepare scripts 1153prepare: ; 1154scripts: ; 1155endif # KBUILD_EXTMOD 1156 1157# Generate tags for editors 1158# --------------------------------------------------------------------------- 1159 1160#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1161#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1162#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1163 1164ifeq ($(src),$(obj)) 1165__srctree = 1166else 1167__srctree = $(srctree)/ 1168endif 1169 1170ifeq ($(ALLSOURCE_ARCHS),) 1171ifeq ($(ARCH),um) 1172ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1173else 1174ALLINCLUDE_ARCHS := $(ARCH) 1175endif 1176else 1177#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1178ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1179endif 1180 1181ALLSOURCE_ARCHS := $(ARCH) 1182 1183define all-sources 1184 ( find $(__srctree) $(RCS_FIND_IGNORE) \ 1185 \( -name include -o -name arch \) -prune -o \ 1186 -name '*.[chS]' -print; \ 1187 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1188 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ 1189 -name '*.[chS]' -print; \ 1190 done ; \ 1191 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1192 -name '*.[chS]' -print; \ 1193 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1194 \( -name config -o -name 'asm-*' \) -prune \ 1195 -o -name '*.[chS]' -print; \ 1196 for ARCH in $(ALLINCLUDE_ARCHS) ; do \ 1197 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ 1198 -name '*.[chS]' -print; \ 1199 done ; \ 1200 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1201 -name '*.[chS]' -print ) 1202endef 1203 1204quiet_cmd_cscope-file = FILELST cscope.files 1205 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1206 1207quiet_cmd_cscope = MAKE cscope.out 1208 cmd_cscope = cscope -b 1209 1210cscope: FORCE 1211 $(call cmd,cscope-file) 1212 $(call cmd,cscope) 1213 1214quiet_cmd_TAGS = MAKE $@ 1215define cmd_TAGS 1216 rm -f $@; \ 1217 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ 1218 echo "-I __initdata,__exitdata,__acquires,__releases \ 1219 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1220 --extra=+f --c-kinds=+px"`; \ 1221 $(all-sources) | xargs etags $$ETAGSF -a 1222endef 1223 1224TAGS: FORCE 1225 $(call cmd,TAGS) 1226 1227 1228quiet_cmd_tags = MAKE $@ 1229define cmd_tags 1230 rm -f $@; \ 1231 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ 1232 echo "-I __initdata,__exitdata,__acquires,__releases \ 1233 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1234 --extra=+f --c-kinds=+px"`; \ 1235 $(all-sources) | xargs ctags $$CTAGSF -a 1236endef 1237 1238tags: FORCE 1239 $(call cmd,tags) 1240 1241 1242# Scripts to check various things for consistency 1243# --------------------------------------------------------------------------- 1244 1245includecheck: 1246 find * $(RCS_FIND_IGNORE) \ 1247 -name '*.[hcS]' -type f -print | sort \ 1248 | xargs $(PERL) -w scripts/checkincludes.pl 1249 1250versioncheck: 1251 find * $(RCS_FIND_IGNORE) \ 1252 -name '*.[hcS]' -type f -print | sort \ 1253 | xargs $(PERL) -w scripts/checkversion.pl 1254 1255namespacecheck: 1256 $(PERL) $(srctree)/scripts/namespace.pl 1257 1258endif #ifeq ($(config-targets),1) 1259endif #ifeq ($(mixed-targets),1) 1260 1261PHONY += checkstack 1262checkstack: 1263 $(OBJDUMP) -d busybox $$(find . -name '*.ko') | \ 1264 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1265 1266kernelrelease: 1267 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ 1268 $(error kernelrelease not valid - run 'make *config' to update it)) 1269kernelversion: 1270 @echo $(KERNELVERSION) 1271 1272# Single targets 1273# --------------------------------------------------------------------------- 1274# Single targets are compatible with: 1275# - build whith mixed source and output 1276# - build with separate output dir 'make O=...' 1277# - external modules 1278# 1279# target-dir => where to store outputfile 1280# build-dir => directory in kernel source tree to use 1281 1282ifeq ($(KBUILD_EXTMOD),) 1283 build-dir = $(patsubst %/,%,$(dir $@)) 1284 target-dir = $(dir $@) 1285else 1286 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1287 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1288 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1289endif 1290 1291%.s: %.c prepare scripts FORCE 1292 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1293%.i: %.c prepare scripts FORCE 1294 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1295%.o: %.c prepare scripts FORCE 1296 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1297%.lst: %.c prepare scripts FORCE 1298 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1299%.s: %.S prepare scripts FORCE 1300 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1301%.o: %.S prepare scripts FORCE 1302 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1303 1304# Modules 1305%/: prepare scripts FORCE 1306 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1307 $(build)=$(build-dir) 1308/: prepare scripts FORCE 1309 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1310 $(build)=$(build-dir) 1311 1312%.ko: prepare scripts FORCE 1313 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1314 $(build)=$(build-dir) $(@:.ko=.o) 1315 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1316 1317# FIXME Should go into a make.lib or something 1318# =========================================================================== 1319 1320quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1321 cmd_rmdirs = rm -rf $(rm-dirs) 1322 1323quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1324 cmd_rmfiles = rm -f $(rm-files) 1325 1326 1327a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1328 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1329 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) 1330 1331quiet_cmd_as_o_S = AS $@ 1332cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1333 1334# read all saved command lines 1335 1336targets := $(wildcard $(sort $(targets))) 1337cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1338 1339ifneq ($(cmd_files),) 1340 $(cmd_files): ; # Do not try to update included dependency files 1341 include $(cmd_files) 1342endif 1343 1344# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1345# Usage: 1346# $(Q)$(MAKE) $(clean)=dir 1347clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1348 1349endif # skip-makefile 1350 1351PHONY += FORCE 1352FORCE: 1353 1354-include $(srctree)/Makefile.custom 1355 1356# Declare the contents of the .PHONY variable as phony. We keep that 1357# information in a variable se we can use it in if_changed and friends. 1358.PHONY: $(PHONY) 1359