1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 29 4EXTRAVERSION = -rc4 5NAME = Erotic Pickled Herring 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: 14# o use make's built-in rules and variables 15# (this increases performance and avoids hard-to-debug behaviour); 16# o print "Entering directory ..."; 17MAKEFLAGS += -rR --no-print-directory 18 19# We are using a recursive build, so we need to do a little thinking 20# to get the ordering right. 21# 22# Most importantly: sub-Makefiles should only ever modify files in 23# their own directory. If in some directory we have a dependency on 24# a file in another dir (which doesn't happen often, but it's often 25# unavoidable when linking the built-in.o targets which finally 26# turn into vmlinux), we will call a sub make in that other dir, and 27# after that we are sure that everything which is in that other dir 28# is now up to date. 29# 30# The only cases where we need to modify files which have global 31# effects are thus separated out and done before the recursive 32# descending is started. They are now explicitly listed as the 33# prepare rule. 34 35# To put more focus on warnings, be less verbose as default 36# Use 'make V=1' to see the full commands 37 38ifdef V 39 ifeq ("$(origin V)", "command line") 40 KBUILD_VERBOSE = $(V) 41 endif 42endif 43ifndef KBUILD_VERBOSE 44 KBUILD_VERBOSE = 0 45endif 46 47# Call a source code checker (by default, "sparse") as part of the 48# C compilation. 49# 50# Use 'make C=1' to enable checking of only re-compiled files. 51# Use 'make C=2' to enable checking of *all* source files, regardless 52# of whether they are re-compiled or not. 53# 54# See the file "Documentation/sparse.txt" for more details, including 55# where to get the "sparse" utility. 56 57ifdef C 58 ifeq ("$(origin C)", "command line") 59 KBUILD_CHECKSRC = $(C) 60 endif 61endif 62ifndef KBUILD_CHECKSRC 63 KBUILD_CHECKSRC = 0 64endif 65 66# Use make M=dir to specify directory of external module to build 67# Old syntax make ... SUBDIRS=$PWD is still supported 68# Setting the environment variable KBUILD_EXTMOD take precedence 69ifdef SUBDIRS 70 KBUILD_EXTMOD ?= $(SUBDIRS) 71endif 72ifdef M 73 ifeq ("$(origin M)", "command line") 74 KBUILD_EXTMOD := $(M) 75 endif 76endif 77 78 79# kbuild supports saving output files in a separate directory. 80# To locate output files in a separate directory two syntaxes are supported. 81# In both cases the working directory must be the root of the kernel src. 82# 1) O= 83# Use "make O=dir/to/store/output/files/" 84# 85# 2) Set KBUILD_OUTPUT 86# Set the environment variable KBUILD_OUTPUT to point to the directory 87# where the output files shall be placed. 88# export KBUILD_OUTPUT=dir/to/store/output/files/ 89# make 90# 91# The O= assignment takes precedence over the KBUILD_OUTPUT environment 92# variable. 93 94 95# KBUILD_SRC is set on invocation of make in OBJ directory 96# KBUILD_SRC is not intended to be used by the regular user (for now) 97ifeq ($(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 := $(O) 104 endif 105endif 106 107# That's our default target when none is given on the command line 108PHONY := _all 109_all: 110 111# Cancel implicit rules on top Makefile 112$(CURDIR)/Makefile Makefile: ; 113 114ifneq ($(KBUILD_OUTPUT),) 115# Invoke a second make in the output directory, passing relevant variables 116# check that the output directory actually exists 117saved-output := $(KBUILD_OUTPUT) 118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 119$(if $(KBUILD_OUTPUT),, \ 120 $(error output directory "$(saved-output)" does not exist)) 121 122PHONY += $(MAKECMDGOALS) sub-make 123 124$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 125 $(Q)@: 126 127sub-make: FORCE 128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 129 KBUILD_SRC=$(CURDIR) \ 130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 131 $(filter-out _all sub-make,$(MAKECMDGOALS)) 132 133# Leave processing to above invocation of make 134skip-makefile := 1 135endif # ifneq ($(KBUILD_OUTPUT),) 136endif # ifeq ($(KBUILD_SRC),) 137 138# We process the rest of the Makefile if this is the final invocation of make 139ifeq ($(skip-makefile),) 140 141# If building an external module we do not care about the all: rule 142# but instead _all depend on modules 143PHONY += all 144ifeq ($(KBUILD_EXTMOD),) 145_all: all 146else 147_all: modules 148endif 149 150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 151TOPDIR := $(srctree) 152# FIXME - TOPDIR is obsolete, use srctree/objtree 153objtree := $(CURDIR) 154src := $(srctree) 155obj := $(objtree) 156 157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 158 159export srctree objtree VPATH TOPDIR 160 161 162# SUBARCH tells the usermode build what the underlying arch is. That is set 163# first, and if a usermode build is happening, the "ARCH=um" on the command 164# line overrides the setting of ARCH below. If a native build is happening, 165# then ARCH is assigned, getting whatever value it gets normally, and 166# SUBARCH is subsequently ignored. 167 168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 169 -e s/arm.*/arm/ -e s/sa110/arm/ \ 170 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 172 -e s/sh.*/sh/ ) 173 174# Cross compiling and selecting different set of gcc/bin-utils 175# --------------------------------------------------------------------------- 176# 177# When performing cross compilation for other architectures ARCH shall be set 178# to the target architecture. (See arch/* for the possibilities). 179# ARCH can be set during invocation of make: 180# make ARCH=ia64 181# Another way is to have ARCH set in the environment. 182# The default ARCH is the host where make is executed. 183 184# CROSS_COMPILE specify the prefix used for all executables used 185# during compilation. Only gcc and related bin-utils executables 186# are prefixed with $(CROSS_COMPILE). 187# CROSS_COMPILE can be set on the command line 188# make CROSS_COMPILE=ia64-linux- 189# Alternatively CROSS_COMPILE can be set in the environment. 190# Default value for CROSS_COMPILE is not to prefix executables 191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 192export KBUILD_BUILDHOST := $(SUBARCH) 193ARCH ?= $(SUBARCH) 194CROSS_COMPILE ?= 195 196# Architecture as present in compile.h 197UTS_MACHINE := $(ARCH) 198SRCARCH := $(ARCH) 199 200# Additional ARCH settings for x86 201ifeq ($(ARCH),i386) 202 SRCARCH := x86 203endif 204ifeq ($(ARCH),x86_64) 205 SRCARCH := x86 206endif 207 208# Additional ARCH settings for sparc 209ifeq ($(ARCH),sparc64) 210 SRCARCH := sparc 211endif 212 213# Where to locate arch specific headers 214hdr-arch := $(SRCARCH) 215 216ifeq ($(ARCH),m68knommu) 217 hdr-arch := m68k 218endif 219 220KCONFIG_CONFIG ?= .config 221 222# SHELL used by kbuild 223CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 224 else if [ -x /bin/bash ]; then echo /bin/bash; \ 225 else echo sh; fi ; fi) 226 227HOSTCC = gcc 228HOSTCXX = g++ 229HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 230HOSTCXXFLAGS = -O2 231 232# Decide whether to build built-in, modular, or both. 233# Normally, just do built-in. 234 235KBUILD_MODULES := 236KBUILD_BUILTIN := 1 237 238# If we have only "make modules", don't compile built-in objects. 239# When we're building modules with modversions, we need to consider 240# the built-in objects during the descend as well, in order to 241# make sure the checksums are up to date before we record them. 242 243ifeq ($(MAKECMDGOALS),modules) 244 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 245endif 246 247# If we have "make <whatever> modules", compile modules 248# in addition to whatever we do anyway. 249# Just "make" or "make all" shall build modules as well 250 251ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 252 KBUILD_MODULES := 1 253endif 254 255ifeq ($(MAKECMDGOALS),) 256 KBUILD_MODULES := 1 257endif 258 259export KBUILD_MODULES KBUILD_BUILTIN 260export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 261 262# Beautify output 263# --------------------------------------------------------------------------- 264# 265# Normally, we echo the whole command before executing it. By making 266# that echo $($(quiet)$(cmd)), we now have the possibility to set 267# $(quiet) to choose other forms of output instead, e.g. 268# 269# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 270# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 271# 272# If $(quiet) is empty, the whole command will be printed. 273# If it is set to "quiet_", only the short version will be printed. 274# If it is set to "silent_", nothing will be printed at all, since 275# the variable $(silent_cmd_cc_o_c) doesn't exist. 276# 277# A simple variant is to prefix commands with $(Q) - that's useful 278# for commands that shall be hidden in non-verbose mode. 279# 280# $(Q)ln $@ :< 281# 282# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 283# If KBUILD_VERBOSE equals 1 then the above command is displayed. 284 285ifeq ($(KBUILD_VERBOSE),1) 286 quiet = 287 Q = 288else 289 quiet=quiet_ 290 Q = @ 291endif 292 293# If the user is running make -s (silent mode), suppress echoing of 294# commands 295 296ifneq ($(findstring s,$(MAKEFLAGS)),) 297 quiet=silent_ 298endif 299 300export quiet Q KBUILD_VERBOSE 301 302 303# Look for make include files relative to root of kernel src 304MAKEFLAGS += --include-dir=$(srctree) 305 306# We need some generic definitions (do not try to remake the file). 307$(srctree)/scripts/Kbuild.include: ; 308include $(srctree)/scripts/Kbuild.include 309 310# Make variables (CC, etc...) 311 312AS = $(CROSS_COMPILE)as 313LD = $(CROSS_COMPILE)ld 314CC = $(CROSS_COMPILE)gcc 315CPP = $(CC) -E 316AR = $(CROSS_COMPILE)ar 317NM = $(CROSS_COMPILE)nm 318STRIP = $(CROSS_COMPILE)strip 319OBJCOPY = $(CROSS_COMPILE)objcopy 320OBJDUMP = $(CROSS_COMPILE)objdump 321AWK = awk 322GENKSYMS = scripts/genksyms/genksyms 323DEPMOD = /sbin/depmod 324KALLSYMS = scripts/kallsyms 325PERL = perl 326CHECK = sparse 327 328CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 329 -Wbitwise -Wno-return-void $(CF) 330MODFLAGS = -DMODULE 331CFLAGS_MODULE = $(MODFLAGS) 332AFLAGS_MODULE = $(MODFLAGS) 333LDFLAGS_MODULE = 334CFLAGS_KERNEL = 335AFLAGS_KERNEL = 336 337 338# Use LINUXINCLUDE when you must reference the include/ directory. 339# Needed to be compatible with the O= option 340LINUXINCLUDE := -Iinclude \ 341 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 342 -I$(srctree)/arch/$(hdr-arch)/include \ 343 -include include/linux/autoconf.h 344 345KBUILD_CPPFLAGS := -D__KERNEL__ 346 347KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 348 -fno-strict-aliasing -fno-common \ 349 -Werror-implicit-function-declaration 350KBUILD_AFLAGS := -D__ASSEMBLY__ 351 352# Read KERNELRELEASE from include/config/kernel.release (if it exists) 353KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 354KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 355 356export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 357export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 358export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 359export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 360 361export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 362export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 363export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 364 365# When compiling out-of-tree modules, put MODVERDIR in the module 366# tree rather than in the kernel tree. The kernel tree might 367# even be read-only. 368export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 369 370# Files to ignore in find ... statements 371 372RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 373export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 374 375# =========================================================================== 376# Rules shared between *config targets and build targets 377 378# Basic helpers built in scripts/ 379PHONY += scripts_basic 380scripts_basic: 381 $(Q)$(MAKE) $(build)=scripts/basic 382 383# To avoid any implicit rule to kick in, define an empty command. 384scripts/basic/%: scripts_basic ; 385 386PHONY += outputmakefile 387# outputmakefile generates a Makefile in the output directory, if using a 388# separate output directory. This allows convenient use of make in the 389# output directory. 390outputmakefile: 391ifneq ($(KBUILD_SRC),) 392 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 393 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 394endif 395 396# To make sure we do not include .config for any of the *config targets 397# catch them early, and hand them over to scripts/kconfig/Makefile 398# It is allowed to specify more targets when calling make, including 399# mixing *config targets and build targets. 400# For example 'make oldconfig all'. 401# Detect when mixed targets is specified, and make a second invocation 402# of make so .config is not included in this case either (for *config). 403 404no-dot-config-targets := clean mrproper distclean \ 405 cscope TAGS tags help %docs check% \ 406 include/linux/version.h headers_% \ 407 kernelrelease kernelversion 408 409config-targets := 0 410mixed-targets := 0 411dot-config := 1 412 413ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 414 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 415 dot-config := 0 416 endif 417endif 418 419ifeq ($(KBUILD_EXTMOD),) 420 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 421 config-targets := 1 422 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 423 mixed-targets := 1 424 endif 425 endif 426endif 427 428ifeq ($(mixed-targets),1) 429# =========================================================================== 430# We're called with mixed targets (*config and build targets). 431# Handle them one by one. 432 433%:: FORCE 434 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 435 436else 437ifeq ($(config-targets),1) 438# =========================================================================== 439# *config targets only - make sure prerequisites are updated, and descend 440# in scripts/kconfig to make the *config target 441 442# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 443# KBUILD_DEFCONFIG may point out an alternative default configuration 444# used for 'make defconfig' 445include $(srctree)/arch/$(SRCARCH)/Makefile 446export KBUILD_DEFCONFIG KBUILD_KCONFIG 447 448config: scripts_basic outputmakefile FORCE 449 $(Q)mkdir -p include/linux include/config 450 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 451 452%config: scripts_basic outputmakefile FORCE 453 $(Q)mkdir -p include/linux include/config 454 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 455 456else 457# =========================================================================== 458# Build targets only - this includes vmlinux, arch specific targets, clean 459# targets and others. In general all targets except *config targets. 460 461ifeq ($(KBUILD_EXTMOD),) 462# Additional helpers built in scripts/ 463# Carefully list dependencies so we do not try to build scripts twice 464# in parallel 465PHONY += scripts 466scripts: scripts_basic include/config/auto.conf 467 $(Q)$(MAKE) $(build)=$(@) 468 469# Objects we will link into vmlinux / subdirs we need to visit 470init-y := init/ 471drivers-y := drivers/ sound/ firmware/ 472net-y := net/ 473libs-y := lib/ 474core-y := usr/ 475endif # KBUILD_EXTMOD 476 477ifeq ($(dot-config),1) 478# Read in config 479-include include/config/auto.conf 480 481ifeq ($(KBUILD_EXTMOD),) 482# Read in dependencies to all Kconfig* files, make sure to run 483# oldconfig if changes are detected. 484-include include/config/auto.conf.cmd 485 486# To avoid any implicit rule to kick in, define an empty command 487$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 488 489# If .config is newer than include/config/auto.conf, someone tinkered 490# with it and forgot to run make oldconfig. 491# if auto.conf.cmd is missing then we are probably in a cleaned tree so 492# we execute the config step to be sure to catch updated Kconfig files 493include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 494 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 495else 496# external modules needs include/linux/autoconf.h and include/config/auto.conf 497# but do not care if they are up-to-date. Use auto.conf to trigger the test 498PHONY += include/config/auto.conf 499 500include/config/auto.conf: 501 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 502 echo; \ 503 echo " ERROR: Kernel configuration is invalid."; \ 504 echo " include/linux/autoconf.h or $@ are missing."; \ 505 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 506 echo; \ 507 /bin/false) 508 509endif # KBUILD_EXTMOD 510 511else 512# Dummy target needed, because used as prerequisite 513include/config/auto.conf: ; 514endif # $(dot-config) 515 516# The all: target is the default when no target is given on the 517# command line. 518# This allow a user to issue only 'make' to build a kernel including modules 519# Defaults vmlinux but it is usually overridden in the arch makefile 520all: vmlinux 521 522ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 523KBUILD_CFLAGS += -Os 524else 525KBUILD_CFLAGS += -O2 526endif 527 528include $(srctree)/arch/$(SRCARCH)/Makefile 529 530ifneq (CONFIG_FRAME_WARN,0) 531KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 532endif 533 534# Force gcc to behave correct even for buggy distributions 535# Arch Makefiles may override this setting 536KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 537 538ifdef CONFIG_FRAME_POINTER 539KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 540else 541KBUILD_CFLAGS += -fomit-frame-pointer 542endif 543 544ifdef CONFIG_DEBUG_INFO 545KBUILD_CFLAGS += -g 546KBUILD_AFLAGS += -gdwarf-2 547endif 548 549ifdef CONFIG_FUNCTION_TRACER 550KBUILD_CFLAGS += -pg 551endif 552 553# We trigger additional mismatches with less inlining 554ifdef CONFIG_DEBUG_SECTION_MISMATCH 555KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 556endif 557 558# arch Makefile may override CC so keep this after arch Makefile is included 559NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 560CHECKFLAGS += $(NOSTDINC_FLAGS) 561 562# warn about C99 declaration after statement 563KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 564 565# disable pointer signed / unsigned warnings in gcc 4.0 566KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 567 568# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 569# But warn user when we do so 570warn-assign = \ 571$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 572 573ifneq ($(KCPPFLAGS),) 574 $(call warn-assign,CPPFLAGS) 575 KBUILD_CPPFLAGS += $(KCPPFLAGS) 576endif 577ifneq ($(KAFLAGS),) 578 $(call warn-assign,AFLAGS) 579 KBUILD_AFLAGS += $(KAFLAGS) 580endif 581ifneq ($(KCFLAGS),) 582 $(call warn-assign,CFLAGS) 583 KBUILD_CFLAGS += $(KCFLAGS) 584endif 585 586# Use --build-id when available. 587LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 588 $(call ld-option, -Wl$(comma)--build-id,)) 589LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 590LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 591 592# Default kernel image to build when no specific target is given. 593# KBUILD_IMAGE may be overruled on the command line or 594# set in the environment 595# Also any assignments in arch/$(ARCH)/Makefile take precedence over 596# this default value 597export KBUILD_IMAGE ?= vmlinux 598 599# 600# INSTALL_PATH specifies where to place the updated kernel and system map 601# images. Default is /boot, but you can set it to other values 602export INSTALL_PATH ?= /boot 603 604# 605# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 606# relocations required by build roots. This is not defined in the 607# makefile but the argument can be passed to make if needed. 608# 609 610MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 611export MODLIB 612 613# 614# INSTALL_MOD_STRIP, if defined, will cause modules to be 615# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 616# the default option --strip-debug will be used. Otherwise, 617# INSTALL_MOD_STRIP will used as the options to the strip command. 618 619ifdef INSTALL_MOD_STRIP 620ifeq ($(INSTALL_MOD_STRIP),1) 621mod_strip_cmd = $(STRIP) --strip-debug 622else 623mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 624endif # INSTALL_MOD_STRIP=1 625else 626mod_strip_cmd = true 627endif # INSTALL_MOD_STRIP 628export mod_strip_cmd 629 630 631ifeq ($(KBUILD_EXTMOD),) 632core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 633 634vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 635 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 636 $(net-y) $(net-m) $(libs-y) $(libs-m))) 637 638vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 639 $(init-n) $(init-) \ 640 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 641 $(net-n) $(net-) $(libs-n) $(libs-)))) 642 643init-y := $(patsubst %/, %/built-in.o, $(init-y)) 644core-y := $(patsubst %/, %/built-in.o, $(core-y)) 645drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 646net-y := $(patsubst %/, %/built-in.o, $(net-y)) 647libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 648libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 649libs-y := $(libs-y1) $(libs-y2) 650 651# Build vmlinux 652# --------------------------------------------------------------------------- 653# vmlinux is built from the objects selected by $(vmlinux-init) and 654# $(vmlinux-main). Most are built-in.o files from top-level directories 655# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 656# Ordering when linking is important, and $(vmlinux-init) must be first. 657# 658# vmlinux 659# ^ 660# | 661# +-< $(vmlinux-init) 662# | +--< init/version.o + more 663# | 664# +--< $(vmlinux-main) 665# | +--< driver/built-in.o mm/built-in.o + more 666# | 667# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 668# 669# vmlinux version (uname -v) cannot be updated during normal 670# descending-into-subdirs phase since we do not yet know if we need to 671# update vmlinux. 672# Therefore this step is delayed until just before final link of vmlinux - 673# except in the kallsyms case where it is done just before adding the 674# symbols to the kernel. 675# 676# System.map is generated to document addresses of all kernel symbols 677 678vmlinux-init := $(head-y) $(init-y) 679vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 680vmlinux-all := $(vmlinux-init) $(vmlinux-main) 681vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 682export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 683 684# Rule to link vmlinux - also used during CONFIG_KALLSYMS 685# May be overridden by arch/$(ARCH)/Makefile 686quiet_cmd_vmlinux__ ?= LD $@ 687 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 688 -T $(vmlinux-lds) $(vmlinux-init) \ 689 --start-group $(vmlinux-main) --end-group \ 690 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 691 692# Generate new vmlinux version 693quiet_cmd_vmlinux_version = GEN .version 694 cmd_vmlinux_version = set -e; \ 695 if [ ! -r .version ]; then \ 696 rm -f .version; \ 697 echo 1 >.version; \ 698 else \ 699 mv .version .old_version; \ 700 expr 0$$(cat .old_version) + 1 >.version; \ 701 fi; \ 702 $(MAKE) $(build)=init 703 704# Generate System.map 705quiet_cmd_sysmap = SYSMAP 706 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 707 708# Link of vmlinux 709# If CONFIG_KALLSYMS is set .version is already updated 710# Generate System.map and verify that the content is consistent 711# Use + in front of the vmlinux_version rule to silent warning with make -j2 712# First command is ':' to allow us to use + in front of the rule 713define rule_vmlinux__ 714 : 715 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 716 717 $(call cmd,vmlinux__) 718 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 719 720 $(Q)$(if $($(quiet)cmd_sysmap), \ 721 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 722 $(cmd_sysmap) $@ System.map; \ 723 if [ $$? -ne 0 ]; then \ 724 rm -f $@; \ 725 /bin/false; \ 726 fi; 727 $(verify_kallsyms) 728endef 729 730 731ifdef CONFIG_KALLSYMS 732# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 733# It's a three stage process: 734# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 735# empty 736# Running kallsyms on that gives us .tmp_kallsyms1.o with 737# the right size - vmlinux version (uname -v) is updated during this step 738# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 739# but due to the added section, some addresses have shifted. 740# From here, we generate a correct .tmp_kallsyms2.o 741# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 742# o Verify that the System.map from vmlinux matches the map from 743# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 744# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 745# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 746# temporary bypass to allow the kernel to be built while the 747# maintainers work out what went wrong with kallsyms. 748 749ifdef CONFIG_KALLSYMS_EXTRA_PASS 750last_kallsyms := 3 751else 752last_kallsyms := 2 753endif 754 755kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 756 757define verify_kallsyms 758 $(Q)$(if $($(quiet)cmd_sysmap), \ 759 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 760 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 761 $(Q)cmp -s System.map .tmp_System.map || \ 762 (echo Inconsistent kallsyms data; \ 763 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 764 rm .tmp_kallsyms* ; /bin/false ) 765endef 766 767# Update vmlinux version before link 768# Use + in front of this rule to silent warning about make -j1 769# First command is ':' to allow us to use + in front of this rule 770cmd_ksym_ld = $(cmd_vmlinux__) 771define rule_ksym_ld 772 : 773 +$(call cmd,vmlinux_version) 774 $(call cmd,vmlinux__) 775 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 776endef 777 778# Generate .S file with all kernel symbols 779quiet_cmd_kallsyms = KSYM $@ 780 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 781 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 782 783.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 784 $(call if_changed_dep,as_o_S) 785 786.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 787 $(call cmd,kallsyms) 788 789# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 790.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 791 $(call if_changed_rule,ksym_ld) 792 793.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 794 $(call if_changed,vmlinux__) 795 796.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 797 $(call if_changed,vmlinux__) 798 799# Needs to visit scripts/ before $(KALLSYMS) can be used. 800$(KALLSYMS): scripts ; 801 802# Generate some data for debugging strange kallsyms problems 803debug_kallsyms: .tmp_map$(last_kallsyms) 804 805.tmp_map%: .tmp_vmlinux% FORCE 806 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 807 808.tmp_map3: .tmp_map2 809 810.tmp_map2: .tmp_map1 811 812endif # ifdef CONFIG_KALLSYMS 813 814# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 815# relevant sections renamed as per the linker script. 816quiet_cmd_vmlinux-modpost = LD $@ 817 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 818 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 819 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 820define rule_vmlinux-modpost 821 : 822 +$(call cmd,vmlinux-modpost) 823 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 824 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 825endef 826 827# vmlinux image - including updated kernel symbols 828vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 829ifdef CONFIG_HEADERS_CHECK 830 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 831endif 832ifdef CONFIG_SAMPLES 833 $(Q)$(MAKE) $(build)=samples 834endif 835ifdef CONFIG_BUILD_DOCSRC 836 $(Q)$(MAKE) $(build)=Documentation 837endif 838 $(call vmlinux-modpost) 839 $(call if_changed_rule,vmlinux__) 840 $(Q)rm -f .old_version 841 842# build vmlinux.o first to catch section mismatch errors early 843ifdef CONFIG_KALLSYMS 844.tmp_vmlinux1: vmlinux.o 845endif 846 847modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 848vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 849 $(call if_changed_rule,vmlinux-modpost) 850 851# The actual objects are generated when descending, 852# make sure no implicit rule kicks in 853$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 854 855# Handle descending into subdirectories listed in $(vmlinux-dirs) 856# Preset locale variables to speed up the build process. Limit locale 857# tweaks to this spot to avoid wrong language settings when running 858# make menuconfig etc. 859# Error messages still appears in the original language 860 861PHONY += $(vmlinux-dirs) 862$(vmlinux-dirs): prepare scripts 863 $(Q)$(MAKE) $(build)=$@ 864 865# Build the kernel release string 866# 867# The KERNELRELEASE value built here is stored in the file 868# include/config/kernel.release, and is used when executing several 869# make targets, such as "make install" or "make modules_install." 870# 871# The eventual kernel release string consists of the following fields, 872# shown in a hierarchical format to show how smaller parts are concatenated 873# to form the larger and final value, with values coming from places like 874# the Makefile, kernel config options, make command line options and/or 875# SCM tag information. 876# 877# $(KERNELVERSION) 878# $(VERSION) eg, 2 879# $(PATCHLEVEL) eg, 6 880# $(SUBLEVEL) eg, 18 881# $(EXTRAVERSION) eg, -rc6 882# $(localver-full) 883# $(localver) 884# localversion* (files without backups, containing '~') 885# $(CONFIG_LOCALVERSION) (from kernel config setting) 886# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 887# ./scripts/setlocalversion (SCM tag, if one exists) 888# $(LOCALVERSION) (from make command line if provided) 889# 890# Note how the final $(localver-auto) string is included *only* if the 891# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 892# moment, only git is supported but other SCMs can edit the script 893# scripts/setlocalversion and add the appropriate checks as needed. 894 895pattern = ".*/localversion[^~]*" 896string = $(shell cat /dev/null \ 897 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 898 899localver = $(subst $(space),, $(string) \ 900 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 901 902# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 903# and if the SCM is know a tag from the SCM is appended. 904# The appended tag is determined by the SCM used. 905# 906# Currently, only git is supported. 907# Other SCMs can edit scripts/setlocalversion and add the appropriate 908# checks as needed. 909ifdef CONFIG_LOCALVERSION_AUTO 910 _localver-auto = $(shell $(CONFIG_SHELL) \ 911 $(srctree)/scripts/setlocalversion $(srctree)) 912 localver-auto = $(LOCALVERSION)$(_localver-auto) 913endif 914 915localver-full = $(localver)$(localver-auto) 916 917# Store (new) KERNELRELASE string in include/config/kernel.release 918kernelrelease = $(KERNELVERSION)$(localver-full) 919include/config/kernel.release: include/config/auto.conf FORCE 920 $(Q)rm -f $@ 921 $(Q)echo $(kernelrelease) > $@ 922 923 924# Things we need to do before we recursively start building the kernel 925# or the modules are listed in "prepare". 926# A multi level approach is used. prepareN is processed before prepareN-1. 927# archprepare is used in arch Makefiles and when processed asm symlink, 928# version.h and scripts_basic is processed / created. 929 930# Listed in dependency order 931PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 932 933# prepare3 is used to check if we are building in a separate output directory, 934# and if so do: 935# 1) Check that make has not been executed in the kernel src $(srctree) 936# 2) Create the include2 directory, used for the second asm symlink 937prepare3: include/config/kernel.release 938ifneq ($(KBUILD_SRC),) 939 @$(kecho) ' Using $(srctree) as source for kernel' 940 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 941 echo " $(srctree) is not clean, please run 'make mrproper'";\ 942 echo " in the '$(srctree)' directory.";\ 943 /bin/false; \ 944 fi; 945 $(Q)if [ ! -d include2 ]; then \ 946 mkdir -p include2; \ 947 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 948 fi 949 ln -fsn $(srctree) source 950endif 951 952# prepare2 creates a makefile if using a separate output directory 953prepare2: prepare3 outputmakefile 954 955prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 956 include/asm include/config/auto.conf 957 $(cmd_crmodverdir) 958 959archprepare: prepare1 scripts_basic 960 961prepare0: archprepare FORCE 962 $(Q)$(MAKE) $(build)=. 963 $(Q)$(MAKE) $(build)=. missing-syscalls 964 965# All the preparing.. 966prepare: prepare0 967 968# Leave this as default for preprocessing vmlinux.lds.S, which is now 969# done in arch/$(ARCH)/kernel/Makefile 970 971export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 972 973# The asm symlink changes when $(ARCH) changes. 974# Detect this and ask user to run make mrproper 975# If asm is a stale symlink (point to dir that does not exist) remove it 976define check-symlink 977 set -e; \ 978 if [ -L include/asm ]; then \ 979 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 980 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 981 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 982 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 983 exit 1; \ 984 fi; \ 985 test -e $$asmlink || rm include/asm; \ 986 elif [ -d include/asm ]; then \ 987 echo "ERROR: $@ is a directory but a symlink was expected";\ 988 exit 1; \ 989 fi 990endef 991 992# We create the target directory of the symlink if it does 993# not exist so the test in check-symlink works and we have a 994# directory for generated filesas used by some architectures. 995define create-symlink 996 if [ ! -L include/asm ]; then \ 997 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 998 if [ ! -d include/asm-$(SRCARCH) ]; then \ 999 mkdir -p include/asm-$(SRCARCH); \ 1000 fi; \ 1001 ln -fsn asm-$(SRCARCH) $@; \ 1002 fi 1003endef 1004 1005include/asm: FORCE 1006 $(Q)$(check-symlink) 1007 $(Q)$(create-symlink) 1008 1009# Generate some files 1010# --------------------------------------------------------------------------- 1011 1012# KERNELRELEASE can change from a few different places, meaning version.h 1013# needs to be updated, so this check is forced on all builds 1014 1015uts_len := 64 1016define filechk_utsrelease.h 1017 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1018 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1019 exit 1; \ 1020 fi; \ 1021 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1022endef 1023 1024define filechk_version.h 1025 (echo \#define LINUX_VERSION_CODE $(shell \ 1026 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1027 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1028endef 1029 1030include/linux/version.h: $(srctree)/Makefile FORCE 1031 $(call filechk,version.h) 1032 1033include/linux/utsrelease.h: include/config/kernel.release FORCE 1034 $(call filechk,utsrelease.h) 1035 1036PHONY += headerdep 1037headerdep: 1038 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 1039 1040# --------------------------------------------------------------------------- 1041 1042PHONY += depend dep 1043depend dep: 1044 @echo '*** Warning: make $@ is unnecessary now.' 1045 1046# --------------------------------------------------------------------------- 1047# Firmware install 1048INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1049export INSTALL_FW_PATH 1050 1051PHONY += firmware_install 1052firmware_install: FORCE 1053 @mkdir -p $(objtree)/firmware 1054 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1055 1056# --------------------------------------------------------------------------- 1057# Kernel headers 1058 1059#Default location for installed headers 1060export INSTALL_HDR_PATH = $(objtree)/usr 1061 1062hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1063# Find out where the Kbuild file is located to support 1064# arch/$(ARCH)/include/asm 1065hdr-dir = $(strip \ 1066 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1067 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1068 1069# If we do an all arch process set dst to asm-$(hdr-arch) 1070hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1071 1072PHONY += __headers 1073__headers: include/linux/version.h scripts_basic FORCE 1074 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1075 1076PHONY += headers_install_all 1077headers_install_all: 1078 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1079 1080PHONY += headers_install 1081headers_install: __headers 1082 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1083 $(error Headers not exportable for the $(SRCARCH) architecture)) 1084 $(Q)$(MAKE) $(hdr-inst)=include 1085 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1086 1087PHONY += headers_check_all 1088headers_check_all: headers_install_all 1089 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1090 1091PHONY += headers_check 1092headers_check: headers_install 1093 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1094 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1095 1096# --------------------------------------------------------------------------- 1097# Modules 1098 1099ifdef CONFIG_MODULES 1100 1101# By default, build modules as well 1102 1103all: modules 1104 1105# Build modules 1106# 1107# A module can be listed more than once in obj-m resulting in 1108# duplicate lines in modules.order files. Those are removed 1109# using awk while concatenating to the final file. 1110 1111PHONY += modules 1112modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1113 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1114 @$(kecho) ' Building modules, stage 2.'; 1115 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1116 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1117 1118 1119# Target to prepare building external modules 1120PHONY += modules_prepare 1121modules_prepare: prepare scripts 1122 1123# Target to install modules 1124PHONY += modules_install 1125modules_install: _modinst_ _modinst_post 1126 1127PHONY += _modinst_ 1128_modinst_: 1129 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1130 echo "Warning: you may need to install module-init-tools"; \ 1131 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1132 sleep 1; \ 1133 fi 1134 @rm -rf $(MODLIB)/kernel 1135 @rm -f $(MODLIB)/source 1136 @mkdir -p $(MODLIB)/kernel 1137 @ln -s $(srctree) $(MODLIB)/source 1138 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1139 rm -f $(MODLIB)/build ; \ 1140 ln -s $(objtree) $(MODLIB)/build ; \ 1141 fi 1142 @cp -f $(objtree)/modules.order $(MODLIB)/ 1143 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1144 1145# This depmod is only for convenience to give the initial 1146# boot a modules.dep even before / is mounted read-write. However the 1147# boot script depmod is the master version. 1148PHONY += _modinst_post 1149_modinst_post: _modinst_ 1150 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1151 $(call cmd,depmod) 1152 1153else # CONFIG_MODULES 1154 1155# Modules not configured 1156# --------------------------------------------------------------------------- 1157 1158modules modules_install: FORCE 1159 @echo 1160 @echo "The present kernel configuration has modules disabled." 1161 @echo "Type 'make config' and enable loadable module support." 1162 @echo "Then build a kernel with module support enabled." 1163 @echo 1164 @exit 1 1165 1166endif # CONFIG_MODULES 1167 1168### 1169# Cleaning is done on three levels. 1170# make clean Delete most generated files 1171# Leave enough to build external modules 1172# make mrproper Delete the current configuration, and all generated files 1173# make distclean Remove editor backup files, patch leftover files and the like 1174 1175# Directories & files removed with 'make clean' 1176CLEAN_DIRS += $(MODVERDIR) 1177CLEAN_FILES += vmlinux System.map \ 1178 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1179 1180# Directories & files removed with 'make mrproper' 1181MRPROPER_DIRS += include/config include2 usr/include 1182MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1183 include/linux/autoconf.h include/linux/version.h \ 1184 include/linux/utsrelease.h \ 1185 include/linux/bounds.h include/asm*/asm-offsets.h \ 1186 Module.symvers Module.markers tags TAGS cscope* 1187 1188# clean - Delete most, but leave enough to build external modules 1189# 1190clean: rm-dirs := $(CLEAN_DIRS) 1191clean: rm-files := $(CLEAN_FILES) 1192clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1193 1194PHONY += $(clean-dirs) clean archclean 1195$(clean-dirs): 1196 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1197 1198clean: archclean $(clean-dirs) 1199 $(call cmd,rmdirs) 1200 $(call cmd,rmfiles) 1201 @find . $(RCS_FIND_IGNORE) \ 1202 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1203 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1204 -o -name '*.symtypes' -o -name 'modules.order' \ 1205 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \ 1206 -type f -print | xargs rm -f 1207 1208# mrproper - Delete all generated files, including .config 1209# 1210mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1211mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1212mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1213 1214PHONY += $(mrproper-dirs) mrproper archmrproper 1215$(mrproper-dirs): 1216 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1217 1218mrproper: clean archmrproper $(mrproper-dirs) 1219 $(call cmd,rmdirs) 1220 $(call cmd,rmfiles) 1221 1222# distclean 1223# 1224PHONY += distclean 1225 1226distclean: mrproper 1227 @find $(srctree) $(RCS_FIND_IGNORE) \ 1228 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1229 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1230 -o -name '.*.rej' -o -size 0 \ 1231 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1232 -type f -print | xargs rm -f 1233 1234 1235# Packaging of the kernel to various formats 1236# --------------------------------------------------------------------------- 1237# rpm target kept for backward compatibility 1238package-dir := $(srctree)/scripts/package 1239 1240%pkg: include/config/kernel.release FORCE 1241 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1242rpm: include/config/kernel.release FORCE 1243 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1244 1245 1246# Brief documentation of the typical targets used 1247# --------------------------------------------------------------------------- 1248 1249boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1250boards := $(notdir $(boards)) 1251board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1252board-dirs := $(sort $(notdir $(board-dirs:/=))) 1253 1254help: 1255 @echo 'Cleaning targets:' 1256 @echo ' clean - Remove most generated files but keep the config and' 1257 @echo ' enough build support to build external modules' 1258 @echo ' mrproper - Remove all generated files + config + various backup files' 1259 @echo ' distclean - mrproper + remove editor backup and patch files' 1260 @echo '' 1261 @echo 'Configuration targets:' 1262 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1263 @echo '' 1264 @echo 'Other generic targets:' 1265 @echo ' all - Build all targets marked with [*]' 1266 @echo '* vmlinux - Build the bare kernel' 1267 @echo '* modules - Build all modules' 1268 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1269 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1270 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1271 @echo ' dir/ - Build all files in dir and below' 1272 @echo ' dir/file.[ois] - Build specified target only' 1273 @echo ' dir/file.ko - Build module including final link' 1274 @echo ' prepare - Set up for building external modules' 1275 @echo ' tags/TAGS - Generate tags file for editors' 1276 @echo ' cscope - Generate cscope index' 1277 @echo ' kernelrelease - Output the release version string' 1278 @echo ' kernelversion - Output the version stored in Makefile' 1279 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1280 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1281 echo '' 1282 @echo 'Static analysers' 1283 @echo ' checkstack - Generate a list of stack hogs' 1284 @echo ' namespacecheck - Name space analysis on compiled kernel' 1285 @echo ' versioncheck - Sanity check on version.h usage' 1286 @echo ' includecheck - Check for duplicate included header files' 1287 @echo ' export_report - List the usages of all exported symbols' 1288 @echo ' headers_check - Sanity check on exported headers' 1289 @echo ' headerdep - Detect inclusion cycles in headers'; \ 1290 echo '' 1291 @echo 'Kernel packaging:' 1292 @$(MAKE) $(build)=$(package-dir) help 1293 @echo '' 1294 @echo 'Documentation targets:' 1295 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1296 @echo '' 1297 @echo 'Architecture specific targets ($(SRCARCH)):' 1298 @$(if $(archhelp),$(archhelp),\ 1299 echo ' No architecture specific help defined for $(SRCARCH)') 1300 @echo '' 1301 @$(if $(boards), \ 1302 $(foreach b, $(boards), \ 1303 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1304 echo '') 1305 @$(if $(board-dirs), \ 1306 $(foreach b, $(board-dirs), \ 1307 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1308 printf " %-16s - Show all of the above\\n" help-boards; \ 1309 echo '') 1310 1311 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1312 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1313 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1314 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1315 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1316 @echo '' 1317 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1318 @echo 'For further info see the ./README file' 1319 1320 1321help-board-dirs := $(addprefix help-,$(board-dirs)) 1322 1323help-boards: $(help-board-dirs) 1324 1325boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1326 1327$(help-board-dirs): help-%: 1328 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1329 @$(if $(boards-per-dir), \ 1330 $(foreach b, $(boards-per-dir), \ 1331 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1332 echo '') 1333 1334 1335# Documentation targets 1336# --------------------------------------------------------------------------- 1337%docs: scripts_basic FORCE 1338 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1339 1340else # KBUILD_EXTMOD 1341 1342### 1343# External module support. 1344# When building external modules the kernel used as basis is considered 1345# read-only, and no consistency checks are made and the make 1346# system is not used on the basis kernel. If updates are required 1347# in the basis kernel ordinary make commands (without M=...) must 1348# be used. 1349# 1350# The following are the only valid targets when building external 1351# modules. 1352# make M=dir clean Delete all automatically generated files 1353# make M=dir modules Make all modules in specified dir 1354# make M=dir Same as 'make M=dir modules' 1355# make M=dir modules_install 1356# Install the modules built in the module directory 1357# Assumes install directory is already created 1358 1359# We are always building modules 1360KBUILD_MODULES := 1 1361PHONY += crmodverdir 1362crmodverdir: 1363 $(cmd_crmodverdir) 1364 1365PHONY += $(objtree)/Module.symvers 1366$(objtree)/Module.symvers: 1367 @test -e $(objtree)/Module.symvers || ( \ 1368 echo; \ 1369 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1370 echo " is missing; modules will have no dependencies and modversions."; \ 1371 echo ) 1372 1373module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1374PHONY += $(module-dirs) modules 1375$(module-dirs): crmodverdir $(objtree)/Module.symvers 1376 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1377 1378modules: $(module-dirs) 1379 @$(kecho) ' Building modules, stage 2.'; 1380 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1381 1382PHONY += modules_install 1383modules_install: _emodinst_ _emodinst_post 1384 1385install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1386PHONY += _emodinst_ 1387_emodinst_: 1388 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1389 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1390 1391PHONY += _emodinst_post 1392_emodinst_post: _emodinst_ 1393 $(call cmd,depmod) 1394 1395clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1396 1397PHONY += $(clean-dirs) clean 1398$(clean-dirs): 1399 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1400 1401clean: rm-dirs := $(MODVERDIR) 1402clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1403clean: $(clean-dirs) 1404 $(call cmd,rmdirs) 1405 $(call cmd,rmfiles) 1406 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1407 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1408 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1409 -type f -print | xargs rm -f 1410 1411help: 1412 @echo ' Building external modules.' 1413 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1414 @echo '' 1415 @echo ' modules - default target, build the module(s)' 1416 @echo ' modules_install - install the module' 1417 @echo ' clean - remove generated files in module directory only' 1418 @echo '' 1419 1420# Dummies... 1421PHONY += prepare scripts 1422prepare: ; 1423scripts: ; 1424endif # KBUILD_EXTMOD 1425 1426# Generate tags for editors 1427# --------------------------------------------------------------------------- 1428quiet_cmd_tags = GEN $@ 1429 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1430 1431tags TAGS cscope: FORCE 1432 $(call cmd,tags) 1433 1434# Scripts to check various things for consistency 1435# --------------------------------------------------------------------------- 1436 1437includecheck: 1438 find * $(RCS_FIND_IGNORE) \ 1439 -name '*.[hcS]' -type f -print | sort \ 1440 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1441 1442versioncheck: 1443 find * $(RCS_FIND_IGNORE) \ 1444 -name '*.[hcS]' -type f -print | sort \ 1445 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1446 1447namespacecheck: 1448 $(PERL) $(srctree)/scripts/namespace.pl 1449 1450export_report: 1451 $(PERL) $(srctree)/scripts/export_report.pl 1452 1453endif #ifeq ($(config-targets),1) 1454endif #ifeq ($(mixed-targets),1) 1455 1456PHONY += checkstack kernelrelease kernelversion 1457 1458# UML needs a little special treatment here. It wants to use the host 1459# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1460# else wants $(ARCH), including people doing cross-builds, which means 1461# that $(SUBARCH) doesn't work here. 1462ifeq ($(ARCH), um) 1463CHECKSTACK_ARCH := $(SUBARCH) 1464else 1465CHECKSTACK_ARCH := $(ARCH) 1466endif 1467checkstack: 1468 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1469 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1470 1471kernelrelease: 1472 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1473 $(error kernelrelease not valid - run 'make prepare' to update it)) 1474kernelversion: 1475 @echo $(KERNELVERSION) 1476 1477# Single targets 1478# --------------------------------------------------------------------------- 1479# Single targets are compatible with: 1480# - build with mixed source and output 1481# - build with separate output dir 'make O=...' 1482# - external modules 1483# 1484# target-dir => where to store outputfile 1485# build-dir => directory in kernel source tree to use 1486 1487ifeq ($(KBUILD_EXTMOD),) 1488 build-dir = $(patsubst %/,%,$(dir $@)) 1489 target-dir = $(dir $@) 1490else 1491 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1492 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1493 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1494endif 1495 1496%.s: %.c prepare scripts FORCE 1497 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1498%.i: %.c prepare scripts FORCE 1499 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1500%.o: %.c prepare scripts FORCE 1501 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1502%.lst: %.c prepare scripts FORCE 1503 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1504%.s: %.S prepare scripts FORCE 1505 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1506%.o: %.S prepare scripts FORCE 1507 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1508%.symtypes: %.c prepare scripts FORCE 1509 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1510 1511# Modules 1512/: prepare scripts FORCE 1513 $(cmd_crmodverdir) 1514 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1515 $(build)=$(build-dir) 1516%/: prepare scripts FORCE 1517 $(cmd_crmodverdir) 1518 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1519 $(build)=$(build-dir) 1520%.ko: prepare scripts FORCE 1521 $(cmd_crmodverdir) 1522 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1523 $(build)=$(build-dir) $(@:.ko=.o) 1524 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1525 1526# FIXME Should go into a make.lib or something 1527# =========================================================================== 1528 1529quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1530 cmd_rmdirs = rm -rf $(rm-dirs) 1531 1532quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1533 cmd_rmfiles = rm -f $(rm-files) 1534 1535# Run depmod only if we have System.map and depmod is executable 1536quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1537 cmd_depmod = \ 1538 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1539 $(DEPMOD) -ae -F System.map \ 1540 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ 1541 $(KERNELRELEASE); \ 1542 fi 1543 1544# Create temporary dir for module support files 1545# clean it up only when building all modules 1546cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1547 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1548 1549a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1550 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1551 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1552 1553quiet_cmd_as_o_S = AS $@ 1554cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1555 1556# read all saved command lines 1557 1558targets := $(wildcard $(sort $(targets))) 1559cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1560 1561ifneq ($(cmd_files),) 1562 $(cmd_files): ; # Do not try to update included dependency files 1563 include $(cmd_files) 1564endif 1565 1566# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1567# Usage: 1568# $(Q)$(MAKE) $(clean)=dir 1569clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1570 1571endif # skip-makefile 1572 1573PHONY += FORCE 1574FORCE: 1575 1576# Declare the contents of the .PHONY variable as phony. We keep that 1577# information in a variable se we can use it in if_changed and friends. 1578.PHONY: $(PHONY) 1579