1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 28 4EXTRAVERSION = -rc7 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 216KCONFIG_CONFIG ?= .config 217 218# SHELL used by kbuild 219CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 220 else if [ -x /bin/bash ]; then echo /bin/bash; \ 221 else echo sh; fi ; fi) 222 223HOSTCC = gcc 224HOSTCXX = g++ 225HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 226HOSTCXXFLAGS = -O2 227 228# Decide whether to build built-in, modular, or both. 229# Normally, just do built-in. 230 231KBUILD_MODULES := 232KBUILD_BUILTIN := 1 233 234# If we have only "make modules", don't compile built-in objects. 235# When we're building modules with modversions, we need to consider 236# the built-in objects during the descend as well, in order to 237# make sure the checksums are up to date before we record them. 238 239ifeq ($(MAKECMDGOALS),modules) 240 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 241endif 242 243# If we have "make <whatever> modules", compile modules 244# in addition to whatever we do anyway. 245# Just "make" or "make all" shall build modules as well 246 247ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 248 KBUILD_MODULES := 1 249endif 250 251ifeq ($(MAKECMDGOALS),) 252 KBUILD_MODULES := 1 253endif 254 255export KBUILD_MODULES KBUILD_BUILTIN 256export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 257 258# Beautify output 259# --------------------------------------------------------------------------- 260# 261# Normally, we echo the whole command before executing it. By making 262# that echo $($(quiet)$(cmd)), we now have the possibility to set 263# $(quiet) to choose other forms of output instead, e.g. 264# 265# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 266# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 267# 268# If $(quiet) is empty, the whole command will be printed. 269# If it is set to "quiet_", only the short version will be printed. 270# If it is set to "silent_", nothing will be printed at all, since 271# the variable $(silent_cmd_cc_o_c) doesn't exist. 272# 273# A simple variant is to prefix commands with $(Q) - that's useful 274# for commands that shall be hidden in non-verbose mode. 275# 276# $(Q)ln $@ :< 277# 278# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 279# If KBUILD_VERBOSE equals 1 then the above command is displayed. 280 281ifeq ($(KBUILD_VERBOSE),1) 282 quiet = 283 Q = 284else 285 quiet=quiet_ 286 Q = @ 287endif 288 289# If the user is running make -s (silent mode), suppress echoing of 290# commands 291 292ifneq ($(findstring s,$(MAKEFLAGS)),) 293 quiet=silent_ 294endif 295 296export quiet Q KBUILD_VERBOSE 297 298 299# Look for make include files relative to root of kernel src 300MAKEFLAGS += --include-dir=$(srctree) 301 302# We need some generic definitions (do not try to remake the file). 303$(srctree)/scripts/Kbuild.include: ; 304include $(srctree)/scripts/Kbuild.include 305 306# Make variables (CC, etc...) 307 308AS = $(CROSS_COMPILE)as 309LD = $(CROSS_COMPILE)ld 310CC = $(CROSS_COMPILE)gcc 311CPP = $(CC) -E 312AR = $(CROSS_COMPILE)ar 313NM = $(CROSS_COMPILE)nm 314STRIP = $(CROSS_COMPILE)strip 315OBJCOPY = $(CROSS_COMPILE)objcopy 316OBJDUMP = $(CROSS_COMPILE)objdump 317AWK = awk 318GENKSYMS = scripts/genksyms/genksyms 319DEPMOD = /sbin/depmod 320KALLSYMS = scripts/kallsyms 321PERL = perl 322CHECK = sparse 323 324CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 325MODFLAGS = -DMODULE 326CFLAGS_MODULE = $(MODFLAGS) 327AFLAGS_MODULE = $(MODFLAGS) 328LDFLAGS_MODULE = 329CFLAGS_KERNEL = 330AFLAGS_KERNEL = 331 332 333# Use LINUXINCLUDE when you must reference the include/ directory. 334# Needed to be compatible with the O= option 335LINUXINCLUDE := -Iinclude \ 336 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 337 -I$(srctree)/arch/$(hdr-arch)/include \ 338 -include include/linux/autoconf.h 339 340KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 341 342KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 343 -fno-strict-aliasing -fno-common \ 344 -Werror-implicit-function-declaration 345KBUILD_AFLAGS := -D__ASSEMBLY__ 346 347# Read KERNELRELEASE from include/config/kernel.release (if it exists) 348KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 349KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 350 351export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 352export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 353export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 354export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 355 356export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 357export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 358export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 359 360# When compiling out-of-tree modules, put MODVERDIR in the module 361# tree rather than in the kernel tree. The kernel tree might 362# even be read-only. 363export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 364 365# Files to ignore in find ... statements 366 367RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 368export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 369 370# =========================================================================== 371# Rules shared between *config targets and build targets 372 373# Basic helpers built in scripts/ 374PHONY += scripts_basic 375scripts_basic: 376 $(Q)$(MAKE) $(build)=scripts/basic 377 378# To avoid any implicit rule to kick in, define an empty command. 379scripts/basic/%: scripts_basic ; 380 381PHONY += outputmakefile 382# outputmakefile generates a Makefile in the output directory, if using a 383# separate output directory. This allows convenient use of make in the 384# output directory. 385outputmakefile: 386ifneq ($(KBUILD_SRC),) 387 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 388 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 389endif 390 391# To make sure we do not include .config for any of the *config targets 392# catch them early, and hand them over to scripts/kconfig/Makefile 393# It is allowed to specify more targets when calling make, including 394# mixing *config targets and build targets. 395# For example 'make oldconfig all'. 396# Detect when mixed targets is specified, and make a second invocation 397# of make so .config is not included in this case either (for *config). 398 399no-dot-config-targets := clean mrproper distclean \ 400 cscope TAGS tags help %docs check% \ 401 include/linux/version.h headers_% \ 402 kernelrelease kernelversion 403 404config-targets := 0 405mixed-targets := 0 406dot-config := 1 407 408ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 409 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 410 dot-config := 0 411 endif 412endif 413 414ifeq ($(KBUILD_EXTMOD),) 415 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 416 config-targets := 1 417 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 418 mixed-targets := 1 419 endif 420 endif 421endif 422 423ifeq ($(mixed-targets),1) 424# =========================================================================== 425# We're called with mixed targets (*config and build targets). 426# Handle them one by one. 427 428%:: FORCE 429 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 430 431else 432ifeq ($(config-targets),1) 433# =========================================================================== 434# *config targets only - make sure prerequisites are updated, and descend 435# in scripts/kconfig to make the *config target 436 437# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 438# KBUILD_DEFCONFIG may point out an alternative default configuration 439# used for 'make defconfig' 440include $(srctree)/arch/$(SRCARCH)/Makefile 441export KBUILD_DEFCONFIG KBUILD_KCONFIG 442 443config %config: scripts_basic outputmakefile FORCE 444 $(Q)mkdir -p include/linux include/config 445 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 446 447else 448# =========================================================================== 449# Build targets only - this includes vmlinux, arch specific targets, clean 450# targets and others. In general all targets except *config targets. 451 452ifeq ($(KBUILD_EXTMOD),) 453# Additional helpers built in scripts/ 454# Carefully list dependencies so we do not try to build scripts twice 455# in parallel 456PHONY += scripts 457scripts: scripts_basic include/config/auto.conf 458 $(Q)$(MAKE) $(build)=$(@) 459 460# Objects we will link into vmlinux / subdirs we need to visit 461init-y := init/ 462drivers-y := drivers/ sound/ firmware/ 463net-y := net/ 464libs-y := lib/ 465core-y := usr/ 466endif # KBUILD_EXTMOD 467 468ifeq ($(dot-config),1) 469# Read in config 470-include include/config/auto.conf 471 472ifeq ($(KBUILD_EXTMOD),) 473# Read in dependencies to all Kconfig* files, make sure to run 474# oldconfig if changes are detected. 475-include include/config/auto.conf.cmd 476 477# To avoid any implicit rule to kick in, define an empty command 478$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 479 480# If .config is newer than include/config/auto.conf, someone tinkered 481# with it and forgot to run make oldconfig. 482# if auto.conf.cmd is missing then we are probably in a cleaned tree so 483# we execute the config step to be sure to catch updated Kconfig files 484include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 485 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 486else 487# external modules needs include/linux/autoconf.h and include/config/auto.conf 488# but do not care if they are up-to-date. Use auto.conf to trigger the test 489PHONY += include/config/auto.conf 490 491include/config/auto.conf: 492 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 493 echo; \ 494 echo " ERROR: Kernel configuration is invalid."; \ 495 echo " include/linux/autoconf.h or $@ are missing."; \ 496 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 497 echo; \ 498 /bin/false) 499 500endif # KBUILD_EXTMOD 501 502else 503# Dummy target needed, because used as prerequisite 504include/config/auto.conf: ; 505endif # $(dot-config) 506 507# The all: target is the default when no target is given on the 508# command line. 509# This allow a user to issue only 'make' to build a kernel including modules 510# Defaults vmlinux but it is usually overridden in the arch makefile 511all: vmlinux 512 513ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 514KBUILD_CFLAGS += -Os 515else 516KBUILD_CFLAGS += -O2 517endif 518 519include $(srctree)/arch/$(SRCARCH)/Makefile 520 521ifneq (CONFIG_FRAME_WARN,0) 522KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 523endif 524 525# Force gcc to behave correct even for buggy distributions 526# Arch Makefiles may override this setting 527KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 528 529ifdef CONFIG_FRAME_POINTER 530KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 531else 532KBUILD_CFLAGS += -fomit-frame-pointer 533endif 534 535ifdef CONFIG_DEBUG_INFO 536KBUILD_CFLAGS += -g 537KBUILD_AFLAGS += -gdwarf-2 538endif 539 540ifdef CONFIG_FUNCTION_TRACER 541KBUILD_CFLAGS += -pg 542endif 543 544# We trigger additional mismatches with less inlining 545ifdef CONFIG_DEBUG_SECTION_MISMATCH 546KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 547endif 548 549# arch Makefile may override CC so keep this after arch Makefile is included 550NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 551CHECKFLAGS += $(NOSTDINC_FLAGS) 552 553# warn about C99 declaration after statement 554KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 555 556# disable pointer signed / unsigned warnings in gcc 4.0 557KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 558 559# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 560# But warn user when we do so 561warn-assign = \ 562$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 563 564ifneq ($(KCPPFLAGS),) 565 $(call warn-assign,CPPFLAGS) 566 KBUILD_CPPFLAGS += $(KCPPFLAGS) 567endif 568ifneq ($(KAFLAGS),) 569 $(call warn-assign,AFLAGS) 570 KBUILD_AFLAGS += $(KAFLAGS) 571endif 572ifneq ($(KCFLAGS),) 573 $(call warn-assign,CFLAGS) 574 KBUILD_CFLAGS += $(KCFLAGS) 575endif 576 577# Use --build-id when available. 578LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 579 $(call ld-option, -Wl$(comma)--build-id,)) 580LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 581LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 582 583# Default kernel image to build when no specific target is given. 584# KBUILD_IMAGE may be overruled on the command line or 585# set in the environment 586# Also any assignments in arch/$(ARCH)/Makefile take precedence over 587# this default value 588export KBUILD_IMAGE ?= vmlinux 589 590# 591# INSTALL_PATH specifies where to place the updated kernel and system map 592# images. Default is /boot, but you can set it to other values 593export INSTALL_PATH ?= /boot 594 595# 596# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 597# relocations required by build roots. This is not defined in the 598# makefile but the argument can be passed to make if needed. 599# 600 601MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 602export MODLIB 603 604# 605# INSTALL_MOD_STRIP, if defined, will cause modules to be 606# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 607# the default option --strip-debug will be used. Otherwise, 608# INSTALL_MOD_STRIP will used as the options to the strip command. 609 610ifdef INSTALL_MOD_STRIP 611ifeq ($(INSTALL_MOD_STRIP),1) 612mod_strip_cmd = $(STRIP) --strip-debug 613else 614mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 615endif # INSTALL_MOD_STRIP=1 616else 617mod_strip_cmd = true 618endif # INSTALL_MOD_STRIP 619export mod_strip_cmd 620 621 622ifeq ($(KBUILD_EXTMOD),) 623core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 624 625vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 626 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 627 $(net-y) $(net-m) $(libs-y) $(libs-m))) 628 629vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 630 $(init-n) $(init-) \ 631 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 632 $(net-n) $(net-) $(libs-n) $(libs-)))) 633 634init-y := $(patsubst %/, %/built-in.o, $(init-y)) 635core-y := $(patsubst %/, %/built-in.o, $(core-y)) 636drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 637net-y := $(patsubst %/, %/built-in.o, $(net-y)) 638libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 639libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 640libs-y := $(libs-y1) $(libs-y2) 641 642# Build vmlinux 643# --------------------------------------------------------------------------- 644# vmlinux is built from the objects selected by $(vmlinux-init) and 645# $(vmlinux-main). Most are built-in.o files from top-level directories 646# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 647# Ordering when linking is important, and $(vmlinux-init) must be first. 648# 649# vmlinux 650# ^ 651# | 652# +-< $(vmlinux-init) 653# | +--< init/version.o + more 654# | 655# +--< $(vmlinux-main) 656# | +--< driver/built-in.o mm/built-in.o + more 657# | 658# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 659# 660# vmlinux version (uname -v) cannot be updated during normal 661# descending-into-subdirs phase since we do not yet know if we need to 662# update vmlinux. 663# Therefore this step is delayed until just before final link of vmlinux - 664# except in the kallsyms case where it is done just before adding the 665# symbols to the kernel. 666# 667# System.map is generated to document addresses of all kernel symbols 668 669vmlinux-init := $(head-y) $(init-y) 670vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 671vmlinux-all := $(vmlinux-init) $(vmlinux-main) 672vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 673export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 674 675# Rule to link vmlinux - also used during CONFIG_KALLSYMS 676# May be overridden by arch/$(ARCH)/Makefile 677quiet_cmd_vmlinux__ ?= LD $@ 678 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 679 -T $(vmlinux-lds) $(vmlinux-init) \ 680 --start-group $(vmlinux-main) --end-group \ 681 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 682 683# Generate new vmlinux version 684quiet_cmd_vmlinux_version = GEN .version 685 cmd_vmlinux_version = set -e; \ 686 if [ ! -r .version ]; then \ 687 rm -f .version; \ 688 echo 1 >.version; \ 689 else \ 690 mv .version .old_version; \ 691 expr 0$$(cat .old_version) + 1 >.version; \ 692 fi; \ 693 $(MAKE) $(build)=init 694 695# Generate System.map 696quiet_cmd_sysmap = SYSMAP 697 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 698 699# Link of vmlinux 700# If CONFIG_KALLSYMS is set .version is already updated 701# Generate System.map and verify that the content is consistent 702# Use + in front of the vmlinux_version rule to silent warning with make -j2 703# First command is ':' to allow us to use + in front of the rule 704define rule_vmlinux__ 705 : 706 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 707 708 $(call cmd,vmlinux__) 709 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 710 711 $(Q)$(if $($(quiet)cmd_sysmap), \ 712 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 713 $(cmd_sysmap) $@ System.map; \ 714 if [ $$? -ne 0 ]; then \ 715 rm -f $@; \ 716 /bin/false; \ 717 fi; 718 $(verify_kallsyms) 719endef 720 721 722ifdef CONFIG_KALLSYMS 723# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 724# It's a three stage process: 725# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 726# empty 727# Running kallsyms on that gives us .tmp_kallsyms1.o with 728# the right size - vmlinux version (uname -v) is updated during this step 729# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 730# but due to the added section, some addresses have shifted. 731# From here, we generate a correct .tmp_kallsyms2.o 732# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 733# o Verify that the System.map from vmlinux matches the map from 734# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 735# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 736# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 737# temporary bypass to allow the kernel to be built while the 738# maintainers work out what went wrong with kallsyms. 739 740ifdef CONFIG_KALLSYMS_EXTRA_PASS 741last_kallsyms := 3 742else 743last_kallsyms := 2 744endif 745 746kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 747 748define verify_kallsyms 749 $(Q)$(if $($(quiet)cmd_sysmap), \ 750 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 751 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 752 $(Q)cmp -s System.map .tmp_System.map || \ 753 (echo Inconsistent kallsyms data; \ 754 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 755 rm .tmp_kallsyms* ; /bin/false ) 756endef 757 758# Update vmlinux version before link 759# Use + in front of this rule to silent warning about make -j1 760# First command is ':' to allow us to use + in front of this rule 761cmd_ksym_ld = $(cmd_vmlinux__) 762define rule_ksym_ld 763 : 764 +$(call cmd,vmlinux_version) 765 $(call cmd,vmlinux__) 766 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 767endef 768 769# Generate .S file with all kernel symbols 770quiet_cmd_kallsyms = KSYM $@ 771 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 772 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 773 774.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 775 $(call if_changed_dep,as_o_S) 776 777.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 778 $(call cmd,kallsyms) 779 780# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 781.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 782 $(call if_changed_rule,ksym_ld) 783 784.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 785 $(call if_changed,vmlinux__) 786 787.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 788 $(call if_changed,vmlinux__) 789 790# Needs to visit scripts/ before $(KALLSYMS) can be used. 791$(KALLSYMS): scripts ; 792 793# Generate some data for debugging strange kallsyms problems 794debug_kallsyms: .tmp_map$(last_kallsyms) 795 796.tmp_map%: .tmp_vmlinux% FORCE 797 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 798 799.tmp_map3: .tmp_map2 800 801.tmp_map2: .tmp_map1 802 803endif # ifdef CONFIG_KALLSYMS 804 805# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 806# relevant sections renamed as per the linker script. 807quiet_cmd_vmlinux-modpost = LD $@ 808 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 809 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 810 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 811define rule_vmlinux-modpost 812 : 813 +$(call cmd,vmlinux-modpost) 814 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 815 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 816endef 817 818# vmlinux image - including updated kernel symbols 819vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 820ifdef CONFIG_HEADERS_CHECK 821 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 822endif 823ifdef CONFIG_SAMPLES 824 $(Q)$(MAKE) $(build)=samples 825endif 826ifdef CONFIG_BUILD_DOCSRC 827 $(Q)$(MAKE) $(build)=Documentation 828endif 829 $(call vmlinux-modpost) 830 $(call if_changed_rule,vmlinux__) 831 $(Q)rm -f .old_version 832 833# build vmlinux.o first to catch section mismatch errors early 834ifdef CONFIG_KALLSYMS 835.tmp_vmlinux1: vmlinux.o 836endif 837 838modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 839vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 840 $(call if_changed_rule,vmlinux-modpost) 841 842# The actual objects are generated when descending, 843# make sure no implicit rule kicks in 844$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 845 846# Handle descending into subdirectories listed in $(vmlinux-dirs) 847# Preset locale variables to speed up the build process. Limit locale 848# tweaks to this spot to avoid wrong language settings when running 849# make menuconfig etc. 850# Error messages still appears in the original language 851 852PHONY += $(vmlinux-dirs) 853$(vmlinux-dirs): prepare scripts 854 $(Q)$(MAKE) $(build)=$@ 855 856# Build the kernel release string 857# 858# The KERNELRELEASE value built here is stored in the file 859# include/config/kernel.release, and is used when executing several 860# make targets, such as "make install" or "make modules_install." 861# 862# The eventual kernel release string consists of the following fields, 863# shown in a hierarchical format to show how smaller parts are concatenated 864# to form the larger and final value, with values coming from places like 865# the Makefile, kernel config options, make command line options and/or 866# SCM tag information. 867# 868# $(KERNELVERSION) 869# $(VERSION) eg, 2 870# $(PATCHLEVEL) eg, 6 871# $(SUBLEVEL) eg, 18 872# $(EXTRAVERSION) eg, -rc6 873# $(localver-full) 874# $(localver) 875# localversion* (files without backups, containing '~') 876# $(CONFIG_LOCALVERSION) (from kernel config setting) 877# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 878# ./scripts/setlocalversion (SCM tag, if one exists) 879# $(LOCALVERSION) (from make command line if provided) 880# 881# Note how the final $(localver-auto) string is included *only* if the 882# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 883# moment, only git is supported but other SCMs can edit the script 884# scripts/setlocalversion and add the appropriate checks as needed. 885 886pattern = ".*/localversion[^~]*" 887string = $(shell cat /dev/null \ 888 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 889 890localver = $(subst $(space),, $(string) \ 891 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 892 893# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 894# and if the SCM is know a tag from the SCM is appended. 895# The appended tag is determined by the SCM used. 896# 897# Currently, only git is supported. 898# Other SCMs can edit scripts/setlocalversion and add the appropriate 899# checks as needed. 900ifdef CONFIG_LOCALVERSION_AUTO 901 _localver-auto = $(shell $(CONFIG_SHELL) \ 902 $(srctree)/scripts/setlocalversion $(srctree)) 903 localver-auto = $(LOCALVERSION)$(_localver-auto) 904endif 905 906localver-full = $(localver)$(localver-auto) 907 908# Store (new) KERNELRELASE string in include/config/kernel.release 909kernelrelease = $(KERNELVERSION)$(localver-full) 910include/config/kernel.release: include/config/auto.conf FORCE 911 $(Q)rm -f $@ 912 $(Q)echo $(kernelrelease) > $@ 913 914 915# Things we need to do before we recursively start building the kernel 916# or the modules are listed in "prepare". 917# A multi level approach is used. prepareN is processed before prepareN-1. 918# archprepare is used in arch Makefiles and when processed asm symlink, 919# version.h and scripts_basic is processed / created. 920 921# Listed in dependency order 922PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 923 924# prepare3 is used to check if we are building in a separate output directory, 925# and if so do: 926# 1) Check that make has not been executed in the kernel src $(srctree) 927# 2) Create the include2 directory, used for the second asm symlink 928prepare3: include/config/kernel.release 929ifneq ($(KBUILD_SRC),) 930 @echo ' Using $(srctree) as source for kernel' 931 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 932 echo " $(srctree) is not clean, please run 'make mrproper'";\ 933 echo " in the '$(srctree)' directory.";\ 934 /bin/false; \ 935 fi; 936 $(Q)if [ ! -d include2 ]; then \ 937 mkdir -p include2; \ 938 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 939 fi 940endif 941 942# prepare2 creates a makefile if using a separate output directory 943prepare2: prepare3 outputmakefile 944 945prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 946 include/asm include/config/auto.conf 947 $(cmd_crmodverdir) 948 949archprepare: prepare1 scripts_basic 950 951prepare0: archprepare FORCE 952 $(Q)$(MAKE) $(build)=. 953 $(Q)$(MAKE) $(build)=. missing-syscalls 954 955# All the preparing.. 956prepare: prepare0 957 958# Leave this as default for preprocessing vmlinux.lds.S, which is now 959# done in arch/$(ARCH)/kernel/Makefile 960 961export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 962 963# The asm symlink changes when $(ARCH) changes. 964# Detect this and ask user to run make mrproper 965# If asm is a stale symlink (point to dir that does not exist) remove it 966define check-symlink 967 set -e; \ 968 if [ -L include/asm ]; then \ 969 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 970 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 971 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 972 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 973 exit 1; \ 974 fi; \ 975 test -e $$asmlink || rm include/asm; \ 976 elif [ -d include/asm ]; then \ 977 echo "ERROR: $@ is a directory but a symlink was expected";\ 978 exit 1; \ 979 fi 980endef 981 982# We create the target directory of the symlink if it does 983# not exist so the test in chack-symlink works and we have a 984# directory for generated filesas used by some architectures. 985define create-symlink 986 if [ ! -L include/asm ]; then \ 987 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 988 if [ ! -d include/asm-$(SRCARCH) ]; then \ 989 mkdir -p include/asm-$(SRCARCH); \ 990 fi; \ 991 ln -fsn asm-$(SRCARCH) $@; \ 992 fi 993endef 994 995include/asm: FORCE 996 $(Q)$(check-symlink) 997 $(Q)$(create-symlink) 998 999# Generate some files 1000# --------------------------------------------------------------------------- 1001 1002# KERNELRELEASE can change from a few different places, meaning version.h 1003# needs to be updated, so this check is forced on all builds 1004 1005uts_len := 64 1006define filechk_utsrelease.h 1007 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1008 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1009 exit 1; \ 1010 fi; \ 1011 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1012endef 1013 1014define filechk_version.h 1015 (echo \#define LINUX_VERSION_CODE $(shell \ 1016 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1017 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1018endef 1019 1020include/linux/version.h: $(srctree)/Makefile FORCE 1021 $(call filechk,version.h) 1022 1023include/linux/utsrelease.h: include/config/kernel.release FORCE 1024 $(call filechk,utsrelease.h) 1025 1026# --------------------------------------------------------------------------- 1027 1028PHONY += depend dep 1029depend dep: 1030 @echo '*** Warning: make $@ is unnecessary now.' 1031 1032# --------------------------------------------------------------------------- 1033# Firmware install 1034INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1035export INSTALL_FW_PATH 1036 1037PHONY += firmware_install 1038firmware_install: FORCE 1039 @mkdir -p $(objtree)/firmware 1040 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1041 1042# --------------------------------------------------------------------------- 1043# Kernel headers 1044 1045#Default location for installed headers 1046export INSTALL_HDR_PATH = $(objtree)/usr 1047 1048hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1049# Find out where the Kbuild file is located to support 1050# arch/$(ARCH)/include/asm 1051hdr-dir = $(strip \ 1052 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1053 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1054 1055# If we do an all arch process set dst to asm-$(hdr-arch) 1056hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1057 1058PHONY += __headers 1059__headers: include/linux/version.h scripts_basic FORCE 1060 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1061 1062PHONY += headers_install_all 1063headers_install_all: 1064 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1065 1066PHONY += headers_install 1067headers_install: __headers 1068 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1069 $(error Headers not exportable for the $(SRCARCH) architecture)) 1070 $(Q)$(MAKE) $(hdr-inst)=include 1071 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1072 1073PHONY += headers_check_all 1074headers_check_all: headers_install_all 1075 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1076 1077PHONY += headers_check 1078headers_check: headers_install 1079 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1080 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1081 1082# --------------------------------------------------------------------------- 1083# Modules 1084 1085ifdef CONFIG_MODULES 1086 1087# By default, build modules as well 1088 1089all: modules 1090 1091# Build modules 1092# 1093# A module can be listed more than once in obj-m resulting in 1094# duplicate lines in modules.order files. Those are removed 1095# using awk while concatenating to the final file. 1096 1097PHONY += modules 1098modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1099 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1100 @echo ' Building modules, stage 2.'; 1101 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1102 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1103 1104 1105# Target to prepare building external modules 1106PHONY += modules_prepare 1107modules_prepare: prepare scripts 1108 1109# Target to install modules 1110PHONY += modules_install 1111modules_install: _modinst_ _modinst_post 1112 1113PHONY += _modinst_ 1114_modinst_: 1115 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1116 echo "Warning: you may need to install module-init-tools"; \ 1117 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1118 sleep 1; \ 1119 fi 1120 @rm -rf $(MODLIB)/kernel 1121 @rm -f $(MODLIB)/source 1122 @mkdir -p $(MODLIB)/kernel 1123 @ln -s $(srctree) $(MODLIB)/source 1124 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1125 rm -f $(MODLIB)/build ; \ 1126 ln -s $(objtree) $(MODLIB)/build ; \ 1127 fi 1128 @cp -f $(objtree)/modules.order $(MODLIB)/ 1129 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1130 1131# This depmod is only for convenience to give the initial 1132# boot a modules.dep even before / is mounted read-write. However the 1133# boot script depmod is the master version. 1134PHONY += _modinst_post 1135_modinst_post: _modinst_ 1136 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1137 $(call cmd,depmod) 1138 1139else # CONFIG_MODULES 1140 1141# Modules not configured 1142# --------------------------------------------------------------------------- 1143 1144modules modules_install: FORCE 1145 @echo 1146 @echo "The present kernel configuration has modules disabled." 1147 @echo "Type 'make config' and enable loadable module support." 1148 @echo "Then build a kernel with module support enabled." 1149 @echo 1150 @exit 1 1151 1152endif # CONFIG_MODULES 1153 1154### 1155# Cleaning is done on three levels. 1156# make clean Delete most generated files 1157# Leave enough to build external modules 1158# make mrproper Delete the current configuration, and all generated files 1159# make distclean Remove editor backup files, patch leftover files and the like 1160 1161# Directories & files removed with 'make clean' 1162CLEAN_DIRS += $(MODVERDIR) 1163CLEAN_FILES += vmlinux System.map \ 1164 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1165 1166# Directories & files removed with 'make mrproper' 1167MRPROPER_DIRS += include/config include2 usr/include 1168MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1169 include/linux/autoconf.h include/linux/version.h \ 1170 include/linux/utsrelease.h \ 1171 include/linux/bounds.h include/asm*/asm-offsets.h \ 1172 Module.symvers Module.markers tags TAGS cscope* 1173 1174# clean - Delete most, but leave enough to build external modules 1175# 1176clean: rm-dirs := $(CLEAN_DIRS) 1177clean: rm-files := $(CLEAN_FILES) 1178clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1179 1180PHONY += $(clean-dirs) clean archclean 1181$(clean-dirs): 1182 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1183 1184clean: archclean $(clean-dirs) 1185 $(call cmd,rmdirs) 1186 $(call cmd,rmfiles) 1187 @find . $(RCS_FIND_IGNORE) \ 1188 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1189 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1190 -o -name '*.symtypes' -o -name 'modules.order' \ 1191 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \ 1192 -type f -print | xargs rm -f 1193 1194# mrproper - Delete all generated files, including .config 1195# 1196mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1197mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1198mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1199 1200PHONY += $(mrproper-dirs) mrproper archmrproper 1201$(mrproper-dirs): 1202 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1203 1204mrproper: clean archmrproper $(mrproper-dirs) 1205 $(call cmd,rmdirs) 1206 $(call cmd,rmfiles) 1207 1208# distclean 1209# 1210PHONY += distclean 1211 1212distclean: mrproper 1213 @find $(srctree) $(RCS_FIND_IGNORE) \ 1214 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1215 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1216 -o -name '.*.rej' -o -size 0 \ 1217 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1218 -type f -print | xargs rm -f 1219 1220 1221# Packaging of the kernel to various formats 1222# --------------------------------------------------------------------------- 1223# rpm target kept for backward compatibility 1224package-dir := $(srctree)/scripts/package 1225 1226%pkg: include/config/kernel.release FORCE 1227 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1228rpm: include/config/kernel.release FORCE 1229 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1230 1231 1232# Brief documentation of the typical targets used 1233# --------------------------------------------------------------------------- 1234 1235boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1236boards := $(notdir $(boards)) 1237board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1238board-dirs := $(sort $(notdir $(board-dirs:/=))) 1239 1240help: 1241 @echo 'Cleaning targets:' 1242 @echo ' clean - Remove most generated files but keep the config and' 1243 @echo ' enough build support to build external modules' 1244 @echo ' mrproper - Remove all generated files + config + various backup files' 1245 @echo ' distclean - mrproper + remove editor backup and patch files' 1246 @echo '' 1247 @echo 'Configuration targets:' 1248 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1249 @echo '' 1250 @echo 'Other generic targets:' 1251 @echo ' all - Build all targets marked with [*]' 1252 @echo '* vmlinux - Build the bare kernel' 1253 @echo '* modules - Build all modules' 1254 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1255 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1256 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1257 @echo ' dir/ - Build all files in dir and below' 1258 @echo ' dir/file.[ois] - Build specified target only' 1259 @echo ' dir/file.ko - Build module including final link' 1260 @echo ' prepare - Set up for building external modules' 1261 @echo ' tags/TAGS - Generate tags file for editors' 1262 @echo ' cscope - Generate cscope index' 1263 @echo ' kernelrelease - Output the release version string' 1264 @echo ' kernelversion - Output the version stored in Makefile' 1265 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1266 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1267 echo '' 1268 @echo 'Static analysers' 1269 @echo ' checkstack - Generate a list of stack hogs' 1270 @echo ' namespacecheck - Name space analysis on compiled kernel' 1271 @echo ' versioncheck - Sanity check on version.h usage' 1272 @echo ' includecheck - Check for duplicate included header files' 1273 @echo ' export_report - List the usages of all exported symbols' 1274 @echo ' headers_check - Sanity check on exported headers'; \ 1275 echo '' 1276 @echo 'Kernel packaging:' 1277 @$(MAKE) $(build)=$(package-dir) help 1278 @echo '' 1279 @echo 'Documentation targets:' 1280 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1281 @echo '' 1282 @echo 'Architecture specific targets ($(SRCARCH)):' 1283 @$(if $(archhelp),$(archhelp),\ 1284 echo ' No architecture specific help defined for $(SRCARCH)') 1285 @echo '' 1286 @$(if $(boards), \ 1287 $(foreach b, $(boards), \ 1288 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1289 echo '') 1290 @$(if $(board-dirs), \ 1291 $(foreach b, $(board-dirs), \ 1292 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1293 printf " %-16s - Show all of the above\\n" help-boards; \ 1294 echo '') 1295 1296 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1297 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1298 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1299 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1300 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1301 @echo '' 1302 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1303 @echo 'For further info see the ./README file' 1304 1305 1306help-board-dirs := $(addprefix help-,$(board-dirs)) 1307 1308help-boards: $(help-board-dirs) 1309 1310boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1311 1312$(help-board-dirs): help-%: 1313 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1314 @$(if $(boards-per-dir), \ 1315 $(foreach b, $(boards-per-dir), \ 1316 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1317 echo '') 1318 1319 1320# Documentation targets 1321# --------------------------------------------------------------------------- 1322%docs: scripts_basic FORCE 1323 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1324 1325else # KBUILD_EXTMOD 1326 1327### 1328# External module support. 1329# When building external modules the kernel used as basis is considered 1330# read-only, and no consistency checks are made and the make 1331# system is not used on the basis kernel. If updates are required 1332# in the basis kernel ordinary make commands (without M=...) must 1333# be used. 1334# 1335# The following are the only valid targets when building external 1336# modules. 1337# make M=dir clean Delete all automatically generated files 1338# make M=dir modules Make all modules in specified dir 1339# make M=dir Same as 'make M=dir modules' 1340# make M=dir modules_install 1341# Install the modules built in the module directory 1342# Assumes install directory is already created 1343 1344# We are always building modules 1345KBUILD_MODULES := 1 1346PHONY += crmodverdir 1347crmodverdir: 1348 $(cmd_crmodverdir) 1349 1350PHONY += $(objtree)/Module.symvers 1351$(objtree)/Module.symvers: 1352 @test -e $(objtree)/Module.symvers || ( \ 1353 echo; \ 1354 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1355 echo " is missing; modules will have no dependencies and modversions."; \ 1356 echo ) 1357 1358module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1359PHONY += $(module-dirs) modules 1360$(module-dirs): crmodverdir $(objtree)/Module.symvers 1361 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1362 1363modules: $(module-dirs) 1364 @echo ' Building modules, stage 2.'; 1365 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1366 1367PHONY += modules_install 1368modules_install: _emodinst_ _emodinst_post 1369 1370install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1371PHONY += _emodinst_ 1372_emodinst_: 1373 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1374 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1375 1376PHONY += _emodinst_post 1377_emodinst_post: _emodinst_ 1378 $(call cmd,depmod) 1379 1380clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1381 1382PHONY += $(clean-dirs) clean 1383$(clean-dirs): 1384 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1385 1386clean: rm-dirs := $(MODVERDIR) 1387clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1388clean: $(clean-dirs) 1389 $(call cmd,rmdirs) 1390 $(call cmd,rmfiles) 1391 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1392 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1393 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1394 -type f -print | xargs rm -f 1395 1396help: 1397 @echo ' Building external modules.' 1398 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1399 @echo '' 1400 @echo ' modules - default target, build the module(s)' 1401 @echo ' modules_install - install the module' 1402 @echo ' clean - remove generated files in module directory only' 1403 @echo '' 1404 1405# Dummies... 1406PHONY += prepare scripts 1407prepare: ; 1408scripts: ; 1409endif # KBUILD_EXTMOD 1410 1411# Generate tags for editors 1412# --------------------------------------------------------------------------- 1413 1414#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1415#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1416#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1417 1418ifeq ($(src),$(obj)) 1419__srctree = 1420else 1421__srctree = $(srctree)/ 1422endif 1423 1424ifeq ($(ALLSOURCE_ARCHS),) 1425ifeq ($(ARCH),um) 1426ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1427else 1428ALLINCLUDE_ARCHS := $(SRCARCH) 1429endif 1430else 1431#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1432ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1433endif 1434 1435ALLSOURCE_ARCHS := $(SRCARCH) 1436 1437define find-sources 1438 ( for arch in $(ALLSOURCE_ARCHS) ; do \ 1439 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \ 1440 -wholename $(__srctree)arch/$${arch}/include/asm -type d -prune \ 1441 -o -name $1 -print; \ 1442 done ; \ 1443 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1444 -name $1 -print; \ 1445 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1446 \( -name config -o -name 'asm-*' \) -prune \ 1447 -o -name $1 -print; \ 1448 for arch in $(ALLINCLUDE_ARCHS) ; do \ 1449 test -e $(__srctree)include/asm-$${arch} && \ 1450 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \ 1451 -name $1 -print; \ 1452 test -e $(__srctree)arch/$${arch}/include/asm && \ 1453 find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \ 1454 -name $1 -print; \ 1455 done ; \ 1456 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1457 -name $1 -print; \ 1458 find $(__srctree) $(RCS_FIND_IGNORE) \ 1459 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \ 1460 -name $1 -print; \ 1461 ) 1462endef 1463 1464define all-sources 1465 $(call find-sources,'*.[chS]') 1466endef 1467define all-kconfigs 1468 $(call find-sources,'Kconfig*') 1469endef 1470define all-defconfigs 1471 $(call find-sources,'defconfig') 1472endef 1473 1474define xtags 1475 if $1 --version 2>&1 | grep -iq exuberant; then \ 1476 $(all-sources) | xargs $1 -a \ 1477 -I __initdata,__exitdata,__acquires,__releases \ 1478 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \ 1479 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1480 --extra=+f --c-kinds=+px \ 1481 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ 1482 $(all-kconfigs) | xargs $1 -a \ 1483 --langdef=kconfig \ 1484 --language-force=kconfig \ 1485 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \ 1486 $(all-defconfigs) | xargs -r $1 -a \ 1487 --langdef=dotconfig \ 1488 --language-force=dotconfig \ 1489 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ 1490 elif $1 --version 2>&1 | grep -iq emacs; then \ 1491 $(all-sources) | xargs $1 -a; \ 1492 $(all-kconfigs) | xargs $1 -a \ 1493 --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \ 1494 $(all-defconfigs) | xargs -r $1 -a \ 1495 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1496 else \ 1497 $(all-sources) | xargs $1 -a; \ 1498 fi 1499endef 1500 1501quiet_cmd_cscope-file = FILELST cscope.files 1502 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1503 1504quiet_cmd_cscope = MAKE cscope.out 1505 cmd_cscope = cscope -b -f cscope.out 1506 1507cscope: FORCE 1508 $(call cmd,cscope-file) 1509 $(call cmd,cscope) 1510 1511quiet_cmd_TAGS = MAKE $@ 1512define cmd_TAGS 1513 rm -f $@; \ 1514 $(call xtags,etags) 1515endef 1516 1517TAGS: FORCE 1518 $(call cmd,TAGS) 1519 1520quiet_cmd_tags = MAKE $@ 1521define cmd_tags 1522 rm -f $@; \ 1523 $(call xtags,ctags) 1524endef 1525 1526tags: FORCE 1527 $(call cmd,tags) 1528 1529 1530# Scripts to check various things for consistency 1531# --------------------------------------------------------------------------- 1532 1533includecheck: 1534 find * $(RCS_FIND_IGNORE) \ 1535 -name '*.[hcS]' -type f -print | sort \ 1536 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1537 1538versioncheck: 1539 find * $(RCS_FIND_IGNORE) \ 1540 -name '*.[hcS]' -type f -print | sort \ 1541 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1542 1543namespacecheck: 1544 $(PERL) $(srctree)/scripts/namespace.pl 1545 1546export_report: 1547 $(PERL) $(srctree)/scripts/export_report.pl 1548 1549endif #ifeq ($(config-targets),1) 1550endif #ifeq ($(mixed-targets),1) 1551 1552PHONY += checkstack kernelrelease kernelversion 1553 1554# UML needs a little special treatment here. It wants to use the host 1555# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1556# else wants $(ARCH), including people doing cross-builds, which means 1557# that $(SUBARCH) doesn't work here. 1558ifeq ($(ARCH), um) 1559CHECKSTACK_ARCH := $(SUBARCH) 1560else 1561CHECKSTACK_ARCH := $(ARCH) 1562endif 1563checkstack: 1564 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1565 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1566 1567kernelrelease: 1568 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1569 $(error kernelrelease not valid - run 'make prepare' to update it)) 1570kernelversion: 1571 @echo $(KERNELVERSION) 1572 1573# Single targets 1574# --------------------------------------------------------------------------- 1575# Single targets are compatible with: 1576# - build with mixed source and output 1577# - build with separate output dir 'make O=...' 1578# - external modules 1579# 1580# target-dir => where to store outputfile 1581# build-dir => directory in kernel source tree to use 1582 1583ifeq ($(KBUILD_EXTMOD),) 1584 build-dir = $(patsubst %/,%,$(dir $@)) 1585 target-dir = $(dir $@) 1586else 1587 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1588 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1589 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1590endif 1591 1592%.s: %.c prepare scripts FORCE 1593 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1594%.i: %.c prepare scripts FORCE 1595 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1596%.o: %.c prepare scripts FORCE 1597 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1598%.lst: %.c prepare scripts FORCE 1599 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1600%.s: %.S prepare scripts FORCE 1601 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1602%.o: %.S prepare scripts FORCE 1603 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1604%.symtypes: %.c prepare scripts FORCE 1605 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1606 1607# Modules 1608/ %/: prepare scripts FORCE 1609 $(cmd_crmodverdir) 1610 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1611 $(build)=$(build-dir) 1612%.ko: prepare scripts FORCE 1613 $(cmd_crmodverdir) 1614 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1615 $(build)=$(build-dir) $(@:.ko=.o) 1616 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1617 1618# FIXME Should go into a make.lib or something 1619# =========================================================================== 1620 1621quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1622 cmd_rmdirs = rm -rf $(rm-dirs) 1623 1624quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1625 cmd_rmfiles = rm -f $(rm-files) 1626 1627# Run depmod only if we have System.map and depmod is executable 1628quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1629 cmd_depmod = \ 1630 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1631 $(DEPMOD) -ae -F System.map \ 1632 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \ 1633 $(KERNELRELEASE); \ 1634 fi 1635 1636# Create temporary dir for module support files 1637# clean it up only when building all modules 1638cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1639 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1640 1641a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1642 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \ 1643 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1644 1645quiet_cmd_as_o_S = AS $@ 1646cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1647 1648# read all saved command lines 1649 1650targets := $(wildcard $(sort $(targets))) 1651cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1652 1653ifneq ($(cmd_files),) 1654 $(cmd_files): ; # Do not try to update included dependency files 1655 include $(cmd_files) 1656endif 1657 1658# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1659# Usage: 1660# $(Q)$(MAKE) $(clean)=dir 1661clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1662 1663endif # skip-makefile 1664 1665PHONY += FORCE 1666FORCE: 1667 1668# Declare the contents of the .PHONY variable as phony. We keep that 1669# information in a variable se we can use it in if_changed and friends. 1670.PHONY: $(PHONY) 1671