1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 36 4EXTRAVERSION = .4 5NAME = Flesh-Eating Bats with Fangs 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# Avoid funny character set dependencies 20unexport LC_ALL 21LC_COLLATE=C 22LC_NUMERIC=C 23export LC_COLLATE LC_NUMERIC 24 25# We are using a recursive build, so we need to do a little thinking 26# to get the ordering right. 27# 28# Most importantly: sub-Makefiles should only ever modify files in 29# their own directory. If in some directory we have a dependency on 30# a file in another dir (which doesn't happen often, but it's often 31# unavoidable when linking the built-in.o targets which finally 32# turn into vmlinux), we will call a sub make in that other dir, and 33# after that we are sure that everything which is in that other dir 34# is now up to date. 35# 36# The only cases where we need to modify files which have global 37# effects are thus separated out and done before the recursive 38# descending is started. They are now explicitly listed as the 39# prepare rule. 40 41# To put more focus on warnings, be less verbose as default 42# Use 'make V=1' to see the full commands 43 44ifeq ("$(origin V)", "command line") 45 KBUILD_VERBOSE = $(V) 46endif 47ifndef KBUILD_VERBOSE 48 KBUILD_VERBOSE = 0 49endif 50 51# Call a source code checker (by default, "sparse") as part of the 52# C compilation. 53# 54# Use 'make C=1' to enable checking of only re-compiled files. 55# Use 'make C=2' to enable checking of *all* source files, regardless 56# of whether they are re-compiled or not. 57# 58# See the file "Documentation/sparse.txt" for more details, including 59# where to get the "sparse" utility. 60 61ifeq ("$(origin C)", "command line") 62 KBUILD_CHECKSRC = $(C) 63endif 64ifndef KBUILD_CHECKSRC 65 KBUILD_CHECKSRC = 0 66endif 67 68# Use make M=dir to specify directory of external module to build 69# Old syntax make ... SUBDIRS=$PWD is still supported 70# Setting the environment variable KBUILD_EXTMOD take precedence 71ifdef SUBDIRS 72 KBUILD_EXTMOD ?= $(SUBDIRS) 73endif 74 75ifeq ("$(origin M)", "command line") 76 KBUILD_EXTMOD := $(M) 77endif 78 79# kbuild supports saving output files in a separate directory. 80# To locate output files in a separate directory two syntaxes are supported. 81# In both cases the working directory must be the root of the kernel src. 82# 1) O= 83# Use "make O=dir/to/store/output/files/" 84# 85# 2) Set KBUILD_OUTPUT 86# Set the environment variable KBUILD_OUTPUT to point to the directory 87# where the output files shall be placed. 88# export KBUILD_OUTPUT=dir/to/store/output/files/ 89# make 90# 91# The O= assignment takes precedence over the KBUILD_OUTPUT environment 92# variable. 93 94 95# KBUILD_SRC is set on invocation of make in OBJ directory 96# KBUILD_SRC is not intended to be used by the regular user (for now) 97ifeq ($(KBUILD_SRC),) 98 99# OK, Make called in directory where kernel src resides 100# Do we want to locate output files in a separate directory? 101ifeq ("$(origin O)", "command line") 102 KBUILD_OUTPUT := $(O) 103endif 104 105# That's our default target when none is given on the command line 106PHONY := _all 107_all: 108 109# Cancel implicit rules on top Makefile 110$(CURDIR)/Makefile Makefile: ; 111 112ifneq ($(KBUILD_OUTPUT),) 113# Invoke a second make in the output directory, passing relevant variables 114# check that the output directory actually exists 115saved-output := $(KBUILD_OUTPUT) 116KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 117$(if $(KBUILD_OUTPUT),, \ 118 $(error output directory "$(saved-output)" does not exist)) 119 120PHONY += $(MAKECMDGOALS) sub-make 121 122$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 123 $(Q)@: 124 125sub-make: FORCE 126 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 127 KBUILD_SRC=$(CURDIR) \ 128 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 129 $(filter-out _all sub-make,$(MAKECMDGOALS)) 130 131# Leave processing to above invocation of make 132skip-makefile := 1 133endif # ifneq ($(KBUILD_OUTPUT),) 134endif # ifeq ($(KBUILD_SRC),) 135 136# We process the rest of the Makefile if this is the final invocation of make 137ifeq ($(skip-makefile),) 138 139# If building an external module we do not care about the all: rule 140# but instead _all depend on modules 141PHONY += all 142ifeq ($(KBUILD_EXTMOD),) 143_all: all 144else 145_all: modules 146endif 147 148srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 149objtree := $(CURDIR) 150src := $(srctree) 151obj := $(objtree) 152 153VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 154 155export srctree objtree VPATH 156 157 158# SUBARCH tells the usermode build what the underlying arch is. That is set 159# first, and if a usermode build is happening, the "ARCH=um" on the command 160# line overrides the setting of ARCH below. If a native build is happening, 161# then ARCH is assigned, getting whatever value it gets normally, and 162# SUBARCH is subsequently ignored. 163 164SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 165 -e s/arm.*/arm/ -e s/sa110/arm/ \ 166 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 167 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 168 -e s/sh[234].*/sh/ ) 169 170# Cross compiling and selecting different set of gcc/bin-utils 171# --------------------------------------------------------------------------- 172# 173# When performing cross compilation for other architectures ARCH shall be set 174# to the target architecture. (See arch/* for the possibilities). 175# ARCH can be set during invocation of make: 176# make ARCH=ia64 177# Another way is to have ARCH set in the environment. 178# The default ARCH is the host where make is executed. 179 180# CROSS_COMPILE specify the prefix used for all executables used 181# during compilation. Only gcc and related bin-utils executables 182# are prefixed with $(CROSS_COMPILE). 183# CROSS_COMPILE can be set on the command line 184# make CROSS_COMPILE=ia64-linux- 185# Alternatively CROSS_COMPILE can be set in the environment. 186# A third alternative is to store a setting in .config so that plain 187# "make" in the configured kernel build directory always uses that. 188# Default value for CROSS_COMPILE is not to prefix executables 189# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 190export KBUILD_BUILDHOST := $(SUBARCH) 191ARCH ?= $(SUBARCH) 192CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 193 194# Architecture as present in compile.h 195UTS_MACHINE := $(ARCH) 196SRCARCH := $(ARCH) 197 198# Additional ARCH settings for x86 199ifeq ($(ARCH),i386) 200 SRCARCH := x86 201endif 202ifeq ($(ARCH),x86_64) 203 SRCARCH := x86 204endif 205 206# Additional ARCH settings for sparc 207ifeq ($(ARCH),sparc64) 208 SRCARCH := sparc 209endif 210 211# Additional ARCH settings for sh 212ifeq ($(ARCH),sh64) 213 SRCARCH := sh 214endif 215 216# Where to locate arch specific headers 217hdr-arch := $(SRCARCH) 218 219ifeq ($(ARCH),m68knommu) 220 hdr-arch := m68k 221endif 222 223KCONFIG_CONFIG ?= .config 224 225# SHELL used by kbuild 226CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 227 else if [ -x /bin/bash ]; then echo /bin/bash; \ 228 else echo sh; fi ; fi) 229 230HOSTCC = gcc 231HOSTCXX = g++ 232HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 233HOSTCXXFLAGS = -O2 234 235# Decide whether to build built-in, modular, or both. 236# Normally, just do built-in. 237 238KBUILD_MODULES := 239KBUILD_BUILTIN := 1 240 241# If we have only "make modules", don't compile built-in objects. 242# When we're building modules with modversions, we need to consider 243# the built-in objects during the descend as well, in order to 244# make sure the checksums are up to date before we record them. 245 246ifeq ($(MAKECMDGOALS),modules) 247 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 248endif 249 250# If we have "make <whatever> modules", compile modules 251# in addition to whatever we do anyway. 252# Just "make" or "make all" shall build modules as well 253 254ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 255 KBUILD_MODULES := 1 256endif 257 258ifeq ($(MAKECMDGOALS),) 259 KBUILD_MODULES := 1 260endif 261 262export KBUILD_MODULES KBUILD_BUILTIN 263export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 264 265# Beautify output 266# --------------------------------------------------------------------------- 267# 268# Normally, we echo the whole command before executing it. By making 269# that echo $($(quiet)$(cmd)), we now have the possibility to set 270# $(quiet) to choose other forms of output instead, e.g. 271# 272# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 273# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 274# 275# If $(quiet) is empty, the whole command will be printed. 276# If it is set to "quiet_", only the short version will be printed. 277# If it is set to "silent_", nothing will be printed at all, since 278# the variable $(silent_cmd_cc_o_c) doesn't exist. 279# 280# A simple variant is to prefix commands with $(Q) - that's useful 281# for commands that shall be hidden in non-verbose mode. 282# 283# $(Q)ln $@ :< 284# 285# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 286# If KBUILD_VERBOSE equals 1 then the above command is displayed. 287 288ifeq ($(KBUILD_VERBOSE),1) 289 quiet = 290 Q = 291else 292 quiet=quiet_ 293 Q = @ 294endif 295 296# If the user is running make -s (silent mode), suppress echoing of 297# commands 298 299ifneq ($(findstring s,$(MAKEFLAGS)),) 300 quiet=silent_ 301endif 302 303export quiet Q KBUILD_VERBOSE 304 305 306# Look for make include files relative to root of kernel src 307MAKEFLAGS += --include-dir=$(srctree) 308 309# We need some generic definitions (do not try to remake the file). 310$(srctree)/scripts/Kbuild.include: ; 311include $(srctree)/scripts/Kbuild.include 312 313# Make variables (CC, etc...) 314 315AS = $(CROSS_COMPILE)as 316LD = $(CROSS_COMPILE)ld 317CC = $(CROSS_COMPILE)gcc 318CPP = $(CC) -E 319AR = $(CROSS_COMPILE)ar 320NM = $(CROSS_COMPILE)nm 321STRIP = $(CROSS_COMPILE)strip 322OBJCOPY = $(CROSS_COMPILE)objcopy 323OBJDUMP = $(CROSS_COMPILE)objdump 324AWK = awk 325GENKSYMS = scripts/genksyms/genksyms 326INSTALLKERNEL := installkernel 327DEPMOD = /sbin/depmod 328KALLSYMS = scripts/kallsyms 329PERL = perl 330CHECK = sparse 331 332CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 333 -Wbitwise -Wno-return-void $(CF) 334CFLAGS_MODULE = 335AFLAGS_MODULE = 336LDFLAGS_MODULE = 337CFLAGS_KERNEL = 338AFLAGS_KERNEL = 339CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 340 341 342# Use LINUXINCLUDE when you must reference the include/ directory. 343# Needed to be compatible with the O= option 344LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \ 345 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 346 -include include/generated/autoconf.h 347 348KBUILD_CPPFLAGS := -D__KERNEL__ 349 350KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 351 -fno-strict-aliasing -fno-common \ 352 -Werror-implicit-function-declaration \ 353 -Wno-format-security \ 354 -fno-delete-null-pointer-checks 355KBUILD_AFLAGS_KERNEL := 356KBUILD_CFLAGS_KERNEL := 357KBUILD_AFLAGS := -D__ASSEMBLY__ 358KBUILD_AFLAGS_MODULE := -DMODULE 359KBUILD_CFLAGS_MODULE := -DMODULE 360KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 361 362# Read KERNELRELEASE from include/config/kernel.release (if it exists) 363KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 364KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 365 366export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 367export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 368export CPP AR NM STRIP OBJCOPY OBJDUMP 369export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 370export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 371 372export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 373export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 374export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 375export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 376export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 377 378# When compiling out-of-tree modules, put MODVERDIR in the module 379# tree rather than in the kernel tree. The kernel tree might 380# even be read-only. 381export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 382 383# Files to ignore in find ... statements 384 385RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 386export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 387 388# =========================================================================== 389# Rules shared between *config targets and build targets 390 391# Basic helpers built in scripts/ 392PHONY += scripts_basic 393scripts_basic: 394 $(Q)$(MAKE) $(build)=scripts/basic 395 $(Q)rm -f .tmp_quiet_recordmcount 396 397# To avoid any implicit rule to kick in, define an empty command. 398scripts/basic/%: scripts_basic ; 399 400PHONY += outputmakefile 401# outputmakefile generates a Makefile in the output directory, if using a 402# separate output directory. This allows convenient use of make in the 403# output directory. 404outputmakefile: 405ifneq ($(KBUILD_SRC),) 406 $(Q)ln -fsn $(srctree) source 407 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 408 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 409endif 410 411# To make sure we do not include .config for any of the *config targets 412# catch them early, and hand them over to scripts/kconfig/Makefile 413# It is allowed to specify more targets when calling make, including 414# mixing *config targets and build targets. 415# For example 'make oldconfig all'. 416# Detect when mixed targets is specified, and make a second invocation 417# of make so .config is not included in this case either (for *config). 418 419no-dot-config-targets := clean mrproper distclean \ 420 cscope TAGS tags help %docs check% coccicheck \ 421 include/linux/version.h headers_% \ 422 kernelversion %src-pkg 423 424config-targets := 0 425mixed-targets := 0 426dot-config := 1 427 428ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 429 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 430 dot-config := 0 431 endif 432endif 433 434ifeq ($(KBUILD_EXTMOD),) 435 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 436 config-targets := 1 437 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 438 mixed-targets := 1 439 endif 440 endif 441endif 442 443ifeq ($(mixed-targets),1) 444# =========================================================================== 445# We're called with mixed targets (*config and build targets). 446# Handle them one by one. 447 448%:: FORCE 449 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 450 451else 452ifeq ($(config-targets),1) 453# =========================================================================== 454# *config targets only - make sure prerequisites are updated, and descend 455# in scripts/kconfig to make the *config target 456 457# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 458# KBUILD_DEFCONFIG may point out an alternative default configuration 459# used for 'make defconfig' 460include $(srctree)/arch/$(SRCARCH)/Makefile 461export KBUILD_DEFCONFIG KBUILD_KCONFIG 462 463config: scripts_basic outputmakefile FORCE 464 $(Q)mkdir -p include/linux include/config 465 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 466 467%config: scripts_basic outputmakefile FORCE 468 $(Q)mkdir -p include/linux include/config 469 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 470 471else 472# =========================================================================== 473# Build targets only - this includes vmlinux, arch specific targets, clean 474# targets and others. In general all targets except *config targets. 475 476ifeq ($(KBUILD_EXTMOD),) 477# Additional helpers built in scripts/ 478# Carefully list dependencies so we do not try to build scripts twice 479# in parallel 480PHONY += scripts 481scripts: scripts_basic include/config/auto.conf include/config/tristate.conf 482 $(Q)$(MAKE) $(build)=$(@) 483 484# Objects we will link into vmlinux / subdirs we need to visit 485init-y := init/ 486drivers-y := drivers/ sound/ firmware/ 487net-y := net/ 488libs-y := lib/ 489core-y := usr/ 490endif # KBUILD_EXTMOD 491 492ifeq ($(dot-config),1) 493# Read in config 494-include include/config/auto.conf 495 496ifeq ($(KBUILD_EXTMOD),) 497# Read in dependencies to all Kconfig* files, make sure to run 498# oldconfig if changes are detected. 499-include include/config/auto.conf.cmd 500 501# To avoid any implicit rule to kick in, define an empty command 502$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 503 504# If .config is newer than include/config/auto.conf, someone tinkered 505# with it and forgot to run make oldconfig. 506# if auto.conf.cmd is missing then we are probably in a cleaned tree so 507# we execute the config step to be sure to catch updated Kconfig files 508include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 509 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 510else 511# external modules needs include/generated/autoconf.h and include/config/auto.conf 512# but do not care if they are up-to-date. Use auto.conf to trigger the test 513PHONY += include/config/auto.conf 514 515include/config/auto.conf: 516 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 517 echo; \ 518 echo " ERROR: Kernel configuration is invalid."; \ 519 echo " include/generated/autoconf.h or $@ are missing.";\ 520 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 521 echo; \ 522 /bin/false) 523 524endif # KBUILD_EXTMOD 525 526else 527# Dummy target needed, because used as prerequisite 528include/config/auto.conf: ; 529endif # $(dot-config) 530 531# The all: target is the default when no target is given on the 532# command line. 533# This allow a user to issue only 'make' to build a kernel including modules 534# Defaults to vmlinux, but the arch makefile usually adds further targets 535all: vmlinux 536 537ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 538KBUILD_CFLAGS += -Os 539else 540KBUILD_CFLAGS += -O2 541endif 542 543include $(srctree)/arch/$(SRCARCH)/Makefile 544 545ifneq ($(CONFIG_FRAME_WARN),0) 546KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 547endif 548 549# Force gcc to behave correct even for buggy distributions 550ifndef CONFIG_CC_STACKPROTECTOR 551KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 552endif 553 554ifdef CONFIG_FRAME_POINTER 555KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 556else 557KBUILD_CFLAGS += -fomit-frame-pointer 558endif 559 560ifdef CONFIG_DEBUG_INFO 561KBUILD_CFLAGS += -g 562KBUILD_AFLAGS += -gdwarf-2 563endif 564 565ifdef CONFIG_DEBUG_INFO_REDUCED 566KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) 567endif 568 569ifdef CONFIG_FUNCTION_TRACER 570KBUILD_CFLAGS += -pg 571endif 572 573# We trigger additional mismatches with less inlining 574ifdef CONFIG_DEBUG_SECTION_MISMATCH 575KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 576endif 577 578# arch Makefile may override CC so keep this after arch Makefile is included 579NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 580CHECKFLAGS += $(NOSTDINC_FLAGS) 581 582# warn about C99 declaration after statement 583KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 584 585# disable pointer signed / unsigned warnings in gcc 4.0 586KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 587 588# disable invalid "can't wrap" optimizations for signed / pointers 589KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 590 591# conserve stack if available 592KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 593 594# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 595# But warn user when we do so 596warn-assign = \ 597$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 598 599ifneq ($(KCPPFLAGS),) 600 $(call warn-assign,CPPFLAGS) 601 KBUILD_CPPFLAGS += $(KCPPFLAGS) 602endif 603ifneq ($(KAFLAGS),) 604 $(call warn-assign,AFLAGS) 605 KBUILD_AFLAGS += $(KAFLAGS) 606endif 607ifneq ($(KCFLAGS),) 608 $(call warn-assign,CFLAGS) 609 KBUILD_CFLAGS += $(KCFLAGS) 610endif 611 612# Use --build-id when available. 613LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 614 $(call cc-ldoption, -Wl$(comma)--build-id,)) 615KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 616LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 617 618ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 619LDFLAGS_vmlinux += $(call ld-option, -X,) 620endif 621 622# Default kernel image to build when no specific target is given. 623# KBUILD_IMAGE may be overruled on the command line or 624# set in the environment 625# Also any assignments in arch/$(ARCH)/Makefile take precedence over 626# this default value 627export KBUILD_IMAGE ?= vmlinux 628 629# 630# INSTALL_PATH specifies where to place the updated kernel and system map 631# images. Default is /boot, but you can set it to other values 632export INSTALL_PATH ?= /boot 633 634# 635# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 636# relocations required by build roots. This is not defined in the 637# makefile but the argument can be passed to make if needed. 638# 639 640MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 641export MODLIB 642 643# 644# INSTALL_MOD_STRIP, if defined, will cause modules to be 645# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 646# the default option --strip-debug will be used. Otherwise, 647# INSTALL_MOD_STRIP will used as the options to the strip command. 648 649ifdef INSTALL_MOD_STRIP 650ifeq ($(INSTALL_MOD_STRIP),1) 651mod_strip_cmd = $(STRIP) --strip-debug 652else 653mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 654endif # INSTALL_MOD_STRIP=1 655else 656mod_strip_cmd = true 657endif # INSTALL_MOD_STRIP 658export mod_strip_cmd 659 660 661ifeq ($(KBUILD_EXTMOD),) 662core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 663 664vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 665 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 666 $(net-y) $(net-m) $(libs-y) $(libs-m))) 667 668vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 669 $(init-n) $(init-) \ 670 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 671 $(net-n) $(net-) $(libs-n) $(libs-)))) 672 673init-y := $(patsubst %/, %/built-in.o, $(init-y)) 674core-y := $(patsubst %/, %/built-in.o, $(core-y)) 675drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 676net-y := $(patsubst %/, %/built-in.o, $(net-y)) 677libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 678libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 679libs-y := $(libs-y1) $(libs-y2) 680 681# Build vmlinux 682# --------------------------------------------------------------------------- 683# vmlinux is built from the objects selected by $(vmlinux-init) and 684# $(vmlinux-main). Most are built-in.o files from top-level directories 685# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 686# Ordering when linking is important, and $(vmlinux-init) must be first. 687# 688# vmlinux 689# ^ 690# | 691# +-< $(vmlinux-init) 692# | +--< init/version.o + more 693# | 694# +--< $(vmlinux-main) 695# | +--< driver/built-in.o mm/built-in.o + more 696# | 697# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 698# 699# vmlinux version (uname -v) cannot be updated during normal 700# descending-into-subdirs phase since we do not yet know if we need to 701# update vmlinux. 702# Therefore this step is delayed until just before final link of vmlinux - 703# except in the kallsyms case where it is done just before adding the 704# symbols to the kernel. 705# 706# System.map is generated to document addresses of all kernel symbols 707 708vmlinux-init := $(head-y) $(init-y) 709vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 710vmlinux-all := $(vmlinux-init) $(vmlinux-main) 711vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 712export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 713 714# Rule to link vmlinux - also used during CONFIG_KALLSYMS 715# May be overridden by arch/$(ARCH)/Makefile 716quiet_cmd_vmlinux__ ?= LD $@ 717 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 718 -T $(vmlinux-lds) $(vmlinux-init) \ 719 --start-group $(vmlinux-main) --end-group \ 720 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 721 722# Generate new vmlinux version 723quiet_cmd_vmlinux_version = GEN .version 724 cmd_vmlinux_version = set -e; \ 725 if [ ! -r .version ]; then \ 726 rm -f .version; \ 727 echo 1 >.version; \ 728 else \ 729 mv .version .old_version; \ 730 expr 0$$(cat .old_version) + 1 >.version; \ 731 fi; \ 732 $(MAKE) $(build)=init 733 734# Generate System.map 735quiet_cmd_sysmap = SYSMAP 736 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 737 738# Link of vmlinux 739# If CONFIG_KALLSYMS is set .version is already updated 740# Generate System.map and verify that the content is consistent 741# Use + in front of the vmlinux_version rule to silent warning with make -j2 742# First command is ':' to allow us to use + in front of the rule 743define rule_vmlinux__ 744 : 745 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 746 747 $(call cmd,vmlinux__) 748 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 749 750 $(Q)$(if $($(quiet)cmd_sysmap), \ 751 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 752 $(cmd_sysmap) $@ System.map; \ 753 if [ $$? -ne 0 ]; then \ 754 rm -f $@; \ 755 /bin/false; \ 756 fi; 757 $(verify_kallsyms) 758endef 759 760 761ifdef CONFIG_KALLSYMS 762# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 763# It's a three stage process: 764# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 765# empty 766# Running kallsyms on that gives us .tmp_kallsyms1.o with 767# the right size - vmlinux version (uname -v) is updated during this step 768# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 769# but due to the added section, some addresses have shifted. 770# From here, we generate a correct .tmp_kallsyms2.o 771# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 772# o Verify that the System.map from vmlinux matches the map from 773# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 774# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 775# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 776# temporary bypass to allow the kernel to be built while the 777# maintainers work out what went wrong with kallsyms. 778 779ifdef CONFIG_KALLSYMS_EXTRA_PASS 780last_kallsyms := 3 781else 782last_kallsyms := 2 783endif 784 785kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 786 787define verify_kallsyms 788 $(Q)$(if $($(quiet)cmd_sysmap), \ 789 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 790 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 791 $(Q)cmp -s System.map .tmp_System.map || \ 792 (echo Inconsistent kallsyms data; \ 793 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 794 rm .tmp_kallsyms* ; /bin/false ) 795endef 796 797# Update vmlinux version before link 798# Use + in front of this rule to silent warning about make -j1 799# First command is ':' to allow us to use + in front of this rule 800cmd_ksym_ld = $(cmd_vmlinux__) 801define rule_ksym_ld 802 : 803 +$(call cmd,vmlinux_version) 804 $(call cmd,vmlinux__) 805 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 806endef 807 808# Generate .S file with all kernel symbols 809quiet_cmd_kallsyms = KSYM $@ 810 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 811 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 812 813.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 814 $(call if_changed_dep,as_o_S) 815 816.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 817 $(call cmd,kallsyms) 818 819# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 820.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 821 $(call if_changed_rule,ksym_ld) 822 823.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 824 $(call if_changed,vmlinux__) 825 826.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 827 $(call if_changed,vmlinux__) 828 829# Needs to visit scripts/ before $(KALLSYMS) can be used. 830$(KALLSYMS): scripts ; 831 832# Generate some data for debugging strange kallsyms problems 833debug_kallsyms: .tmp_map$(last_kallsyms) 834 835.tmp_map%: .tmp_vmlinux% FORCE 836 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 837 838.tmp_map3: .tmp_map2 839 840.tmp_map2: .tmp_map1 841 842endif # ifdef CONFIG_KALLSYMS 843 844# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 845# relevant sections renamed as per the linker script. 846quiet_cmd_vmlinux-modpost = LD $@ 847 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 848 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 849 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 850define rule_vmlinux-modpost 851 : 852 +$(call cmd,vmlinux-modpost) 853 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 854 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 855endef 856 857# vmlinux image - including updated kernel symbols 858vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 859ifdef CONFIG_HEADERS_CHECK 860 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 861endif 862ifdef CONFIG_SAMPLES 863 $(Q)$(MAKE) $(build)=samples 864endif 865ifdef CONFIG_BUILD_DOCSRC 866 $(Q)$(MAKE) $(build)=Documentation 867endif 868 $(call vmlinux-modpost) 869 $(call if_changed_rule,vmlinux__) 870 $(Q)rm -f .old_version 871 872# build vmlinux.o first to catch section mismatch errors early 873ifdef CONFIG_KALLSYMS 874.tmp_vmlinux1: vmlinux.o 875endif 876 877modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 878vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 879 $(call if_changed_rule,vmlinux-modpost) 880 881# The actual objects are generated when descending, 882# make sure no implicit rule kicks in 883$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 884 885# Handle descending into subdirectories listed in $(vmlinux-dirs) 886# Preset locale variables to speed up the build process. Limit locale 887# tweaks to this spot to avoid wrong language settings when running 888# make menuconfig etc. 889# Error messages still appears in the original language 890 891PHONY += $(vmlinux-dirs) 892$(vmlinux-dirs): prepare scripts 893 $(Q)$(MAKE) $(build)=$@ 894 895# Store (new) KERNELRELASE string in include/config/kernel.release 896include/config/kernel.release: include/config/auto.conf FORCE 897 $(Q)rm -f $@ 898 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@ 899 900 901# Things we need to do before we recursively start building the kernel 902# or the modules are listed in "prepare". 903# A multi level approach is used. prepareN is processed before prepareN-1. 904# archprepare is used in arch Makefiles and when processed asm symlink, 905# version.h and scripts_basic is processed / created. 906 907# Listed in dependency order 908PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 909 910# prepare3 is used to check if we are building in a separate output directory, 911# and if so do: 912# 1) Check that make has not been executed in the kernel src $(srctree) 913prepare3: include/config/kernel.release 914ifneq ($(KBUILD_SRC),) 915 @$(kecho) ' Using $(srctree) as source for kernel' 916 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 917 echo " $(srctree) is not clean, please run 'make mrproper'";\ 918 echo " in the '$(srctree)' directory.";\ 919 /bin/false; \ 920 fi; 921endif 922 923# prepare2 creates a makefile if using a separate output directory 924prepare2: prepare3 outputmakefile 925 926prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ 927 include/config/auto.conf 928 $(cmd_crmodverdir) 929 930archprepare: prepare1 scripts_basic 931 932prepare0: archprepare FORCE 933 $(Q)$(MAKE) $(build)=. 934 $(Q)$(MAKE) $(build)=. missing-syscalls 935 936# All the preparing.. 937prepare: prepare0 938 939# Generate some files 940# --------------------------------------------------------------------------- 941 942# KERNELRELEASE can change from a few different places, meaning version.h 943# needs to be updated, so this check is forced on all builds 944 945uts_len := 64 946define filechk_utsrelease.h 947 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 948 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 949 exit 1; \ 950 fi; \ 951 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 952endef 953 954define filechk_version.h 955 (echo \#define LINUX_VERSION_CODE $(shell \ 956 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 957 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 958endef 959 960include/linux/version.h: $(srctree)/Makefile FORCE 961 $(call filechk,version.h) 962 963include/generated/utsrelease.h: include/config/kernel.release FORCE 964 $(call filechk,utsrelease.h) 965 966PHONY += headerdep 967headerdep: 968 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 969 970# --------------------------------------------------------------------------- 971 972PHONY += depend dep 973depend dep: 974 @echo '*** Warning: make $@ is unnecessary now.' 975 976# --------------------------------------------------------------------------- 977# Firmware install 978INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 979export INSTALL_FW_PATH 980 981PHONY += firmware_install 982firmware_install: FORCE 983 @mkdir -p $(objtree)/firmware 984 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 985 986# --------------------------------------------------------------------------- 987# Kernel headers 988 989#Default location for installed headers 990export INSTALL_HDR_PATH = $(objtree)/usr 991 992hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 993 994# If we do an all arch process set dst to asm-$(hdr-arch) 995hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 996 997PHONY += __headers 998__headers: include/linux/version.h scripts_basic FORCE 999 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1000
1001PHONY += headers_install_all 1002headers_install_all: 1003 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1004 1005PHONY += headers_install 1006headers_install: __headers 1007 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ 1008 $(error Headers not exportable for the $(SRCARCH) architecture)) 1009 $(Q)$(MAKE) $(hdr-inst)=include 1010 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) 1011 1012PHONY += headers_check_all 1013headers_check_all: headers_install_all 1014 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1015 1016PHONY += headers_check 1017headers_check: headers_install 1018 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1019 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 1020 1021# --------------------------------------------------------------------------- 1022# Modules 1023 1024ifdef CONFIG_MODULES 1025 1026# By default, build modules as well 1027 1028all: modules 1029 1030# Build modules 1031# 1032# A module can be listed more than once in obj-m resulting in 1033# duplicate lines in modules.order files. Those are removed 1034# using awk while concatenating to the final file. 1035 1036PHONY += modules 1037modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1038 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1039 @$(kecho) ' Building modules, stage 2.'; 1040 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1041 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1042 1043modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1044 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1045 1046%/modules.builtin: include/config/auto.conf 1047 $(Q)$(MAKE) $(modbuiltin)=$* 1048 1049 1050# Target to prepare building external modules 1051PHONY += modules_prepare 1052modules_prepare: prepare scripts 1053 1054# Target to install modules 1055PHONY += modules_install 1056modules_install: _modinst_ _modinst_post 1057 1058PHONY += _modinst_ 1059_modinst_: 1060 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1061 echo "Warning: you may need to install module-init-tools"; \ 1062 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1063 sleep 1; \ 1064 fi 1065 @rm -rf $(MODLIB)/kernel 1066 @rm -f $(MODLIB)/source 1067 @mkdir -p $(MODLIB)/kernel 1068 @ln -s $(srctree) $(MODLIB)/source 1069 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1070 rm -f $(MODLIB)/build ; \ 1071 ln -s $(objtree) $(MODLIB)/build ; \ 1072 fi 1073 @cp -f $(objtree)/modules.order $(MODLIB)/ 1074 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1075 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1076 1077# This depmod is only for convenience to give the initial 1078# boot a modules.dep even before / is mounted read-write. However the 1079# boot script depmod is the master version. 1080PHONY += _modinst_post 1081_modinst_post: _modinst_ 1082 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1083 $(call cmd,depmod) 1084 1085else # CONFIG_MODULES 1086 1087# Modules not configured 1088# --------------------------------------------------------------------------- 1089 1090modules modules_install: FORCE 1091 @echo 1092 @echo "The present kernel configuration has modules disabled." 1093 @echo "Type 'make config' and enable loadable module support." 1094 @echo "Then build a kernel with module support enabled." 1095 @echo 1096 @exit 1 1097 1098endif # CONFIG_MODULES 1099 1100### 1101# Cleaning is done on three levels. 1102# make clean Delete most generated files 1103# Leave enough to build external modules 1104# make mrproper Delete the current configuration, and all generated files 1105# make distclean Remove editor backup files, patch leftover files and the like 1106 1107# Directories & files removed with 'make clean' 1108CLEAN_DIRS += $(MODVERDIR) 1109CLEAN_FILES += vmlinux System.map \ 1110 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1111 1112# Directories & files removed with 'make mrproper' 1113MRPROPER_DIRS += include/config usr/include include/generated 1114MRPROPER_FILES += .config .config.old .version .old_version \ 1115 include/linux/version.h \ 1116 Module.symvers tags TAGS cscope* 1117 1118# clean - Delete most, but leave enough to build external modules 1119# 1120clean: rm-dirs := $(CLEAN_DIRS) 1121clean: rm-files := $(CLEAN_FILES) 1122clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1123 1124PHONY += $(clean-dirs) clean archclean 1125$(clean-dirs): 1126 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1127 1128clean: archclean $(clean-dirs) 1129 $(call cmd,rmdirs) 1130 $(call cmd,rmfiles) 1131 @find . $(RCS_FIND_IGNORE) \ 1132 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1133 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1134 -o -name '*.symtypes' -o -name 'modules.order' \ 1135 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1136 -o -name '*.gcno' \) -type f -print | xargs rm -f 1137 1138# mrproper - Delete all generated files, including .config 1139# 1140mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1141mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1142mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1143 1144PHONY += $(mrproper-dirs) mrproper archmrproper 1145$(mrproper-dirs): 1146 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1147 1148mrproper: clean archmrproper $(mrproper-dirs) 1149 $(call cmd,rmdirs) 1150 $(call cmd,rmfiles) 1151 1152# distclean 1153# 1154PHONY += distclean 1155 1156distclean: mrproper 1157 @find $(srctree) $(RCS_FIND_IGNORE) \ 1158 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1159 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1160 -o -name '.*.rej' -o -size 0 \ 1161 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1162 -type f -print | xargs rm -f 1163 1164 1165# Packaging of the kernel to various formats 1166# --------------------------------------------------------------------------- 1167# rpm target kept for backward compatibility 1168package-dir := $(srctree)/scripts/package 1169 1170%src-pkg: FORCE 1171 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1172%pkg: include/config/kernel.release FORCE 1173 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1174rpm: include/config/kernel.release FORCE 1175 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1176 1177 1178# Brief documentation of the typical targets used 1179# --------------------------------------------------------------------------- 1180 1181boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1182boards := $(notdir $(boards)) 1183board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1184board-dirs := $(sort $(notdir $(board-dirs:/=))) 1185 1186help: 1187 @echo 'Cleaning targets:' 1188 @echo ' clean - Remove most generated files but keep the config and' 1189 @echo ' enough build support to build external modules' 1190 @echo ' mrproper - Remove all generated files + config + various backup files' 1191 @echo ' distclean - mrproper + remove editor backup and patch files' 1192 @echo '' 1193 @echo 'Configuration targets:' 1194 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1195 @echo '' 1196 @echo 'Other generic targets:' 1197 @echo ' all - Build all targets marked with [*]' 1198 @echo '* vmlinux - Build the bare kernel' 1199 @echo '* modules - Build all modules' 1200 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1201 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1202 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1203 @echo ' dir/ - Build all files in dir and below' 1204 @echo ' dir/file.[oisS] - Build specified target only' 1205 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1206 @echo ' (requires a recent binutils and recent build (System.map))' 1207 @echo ' dir/file.ko - Build module including final link' 1208 @echo ' modules_prepare - Set up for building external modules' 1209 @echo ' tags/TAGS - Generate tags file for editors' 1210 @echo ' cscope - Generate cscope index' 1211 @echo ' kernelrelease - Output the release version string' 1212 @echo ' kernelversion - Output the version stored in Makefile' 1213 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1214 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1215 echo '' 1216 @echo 'Static analysers' 1217 @echo ' checkstack - Generate a list of stack hogs' 1218 @echo ' namespacecheck - Name space analysis on compiled kernel' 1219 @echo ' versioncheck - Sanity check on version.h usage' 1220 @echo ' includecheck - Check for duplicate included header files' 1221 @echo ' export_report - List the usages of all exported symbols' 1222 @echo ' headers_check - Sanity check on exported headers' 1223 @echo ' headerdep - Detect inclusion cycles in headers' 1224 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1225 @echo '' 1226 @echo 'Kernel packaging:' 1227 @$(MAKE) $(build)=$(package-dir) help 1228 @echo '' 1229 @echo 'Documentation targets:' 1230 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1231 @echo '' 1232 @echo 'Architecture specific targets ($(SRCARCH)):' 1233 @$(if $(archhelp),$(archhelp),\ 1234 echo ' No architecture specific help defined for $(SRCARCH)') 1235 @echo '' 1236 @$(if $(boards), \ 1237 $(foreach b, $(boards), \ 1238 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1239 echo '') 1240 @$(if $(board-dirs), \ 1241 $(foreach b, $(board-dirs), \ 1242 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1243 printf " %-16s - Show all of the above\\n" help-boards; \ 1244 echo '') 1245 1246 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1247 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1248 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1249 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1250 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1251 @echo '' 1252 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1253 @echo 'For further info see the ./README file' 1254 1255 1256help-board-dirs := $(addprefix help-,$(board-dirs)) 1257 1258help-boards: $(help-board-dirs) 1259 1260boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1261 1262$(help-board-dirs): help-%: 1263 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1264 @$(if $(boards-per-dir), \ 1265 $(foreach b, $(boards-per-dir), \ 1266 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1267 echo '') 1268 1269 1270# Documentation targets 1271# --------------------------------------------------------------------------- 1272%docs: scripts_basic FORCE 1273 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1274 1275else # KBUILD_EXTMOD 1276 1277### 1278# External module support. 1279# When building external modules the kernel used as basis is considered 1280# read-only, and no consistency checks are made and the make 1281# system is not used on the basis kernel. If updates are required 1282# in the basis kernel ordinary make commands (without M=...) must 1283# be used. 1284# 1285# The following are the only valid targets when building external 1286# modules. 1287# make M=dir clean Delete all automatically generated files 1288# make M=dir modules Make all modules in specified dir 1289# make M=dir Same as 'make M=dir modules' 1290# make M=dir modules_install 1291# Install the modules built in the module directory 1292# Assumes install directory is already created 1293 1294# We are always building modules 1295KBUILD_MODULES := 1 1296PHONY += crmodverdir 1297crmodverdir: 1298 $(cmd_crmodverdir) 1299 1300PHONY += $(objtree)/Module.symvers 1301$(objtree)/Module.symvers: 1302 @test -e $(objtree)/Module.symvers || ( \ 1303 echo; \ 1304 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1305 echo " is missing; modules will have no dependencies and modversions."; \ 1306 echo ) 1307 1308module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1309PHONY += $(module-dirs) modules 1310$(module-dirs): crmodverdir $(objtree)/Module.symvers 1311 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1312 1313modules: $(module-dirs) 1314 @$(kecho) ' Building modules, stage 2.'; 1315 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1316 1317PHONY += modules_install 1318modules_install: _emodinst_ _emodinst_post 1319 1320install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1321PHONY += _emodinst_ 1322_emodinst_: 1323 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1324 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1325 1326PHONY += _emodinst_post 1327_emodinst_post: _emodinst_ 1328 $(call cmd,depmod) 1329 1330clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1331 1332PHONY += $(clean-dirs) clean 1333$(clean-dirs): 1334 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1335 1336clean: rm-dirs := $(MODVERDIR) 1337clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ 1338 $(KBUILD_EXTMOD)/modules.order \ 1339 $(KBUILD_EXTMOD)/modules.builtin 1340clean: $(clean-dirs) 1341 $(call cmd,rmdirs) 1342 $(call cmd,rmfiles) 1343 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1344 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1345 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1346 -o -name '*.gcno' \) -type f -print | xargs rm -f 1347 1348help: 1349 @echo ' Building external modules.' 1350 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1351 @echo '' 1352 @echo ' modules - default target, build the module(s)' 1353 @echo ' modules_install - install the module' 1354 @echo ' clean - remove generated files in module directory only' 1355 @echo '' 1356 1357# Dummies... 1358PHONY += prepare scripts 1359prepare: ; 1360scripts: ; 1361endif # KBUILD_EXTMOD 1362 1363# Generate tags for editors 1364# --------------------------------------------------------------------------- 1365quiet_cmd_tags = GEN $@ 1366 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1367 1368tags TAGS cscope: FORCE 1369 $(call cmd,tags) 1370 1371# Scripts to check various things for consistency 1372# --------------------------------------------------------------------------- 1373 1374includecheck: 1375 find * $(RCS_FIND_IGNORE) \ 1376 -name '*.[hcS]' -type f -print | sort \ 1377 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1378 1379versioncheck: 1380 find * $(RCS_FIND_IGNORE) \ 1381 -name '*.[hcS]' -type f -print | sort \ 1382 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1383 1384coccicheck: 1385 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1386 1387namespacecheck: 1388 $(PERL) $(srctree)/scripts/namespace.pl 1389 1390export_report: 1391 $(PERL) $(srctree)/scripts/export_report.pl 1392 1393endif #ifeq ($(config-targets),1) 1394endif #ifeq ($(mixed-targets),1) 1395 1396PHONY += checkstack kernelrelease kernelversion 1397 1398# UML needs a little special treatment here. It wants to use the host 1399# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1400# else wants $(ARCH), including people doing cross-builds, which means 1401# that $(SUBARCH) doesn't work here. 1402ifeq ($(ARCH), um) 1403CHECKSTACK_ARCH := $(SUBARCH) 1404else 1405CHECKSTACK_ARCH := $(ARCH) 1406endif 1407checkstack: 1408 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1409 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1410 1411kernelrelease: 1412 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1413 1414kernelversion: 1415 @echo $(KERNELVERSION) 1416 1417# Single targets 1418# --------------------------------------------------------------------------- 1419# Single targets are compatible with: 1420# - build with mixed source and output 1421# - build with separate output dir 'make O=...' 1422# - external modules 1423# 1424# target-dir => where to store outputfile 1425# build-dir => directory in kernel source tree to use 1426 1427ifeq ($(KBUILD_EXTMOD),) 1428 build-dir = $(patsubst %/,%,$(dir $@)) 1429 target-dir = $(dir $@) 1430else 1431 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1432 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1433 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1434endif 1435 1436%.s: %.c prepare scripts FORCE 1437 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1438%.i: %.c prepare scripts FORCE 1439 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1440%.o: %.c prepare scripts FORCE 1441 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1442%.lst: %.c prepare scripts FORCE 1443 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1444%.s: %.S prepare scripts FORCE 1445 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1446%.o: %.S prepare scripts FORCE 1447 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1448%.symtypes: %.c prepare scripts FORCE 1449 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1450 1451# Modules 1452/: prepare scripts FORCE 1453 $(cmd_crmodverdir) 1454 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1455 $(build)=$(build-dir) 1456%/: prepare scripts FORCE 1457 $(cmd_crmodverdir) 1458 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1459 $(build)=$(build-dir) 1460%.ko: prepare scripts FORCE 1461 $(cmd_crmodverdir) 1462 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1463 $(build)=$(build-dir) $(@:.ko=.o) 1464 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1465 1466# FIXME Should go into a make.lib or something 1467# =========================================================================== 1468 1469quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1470 cmd_rmdirs = rm -rf $(rm-dirs) 1471 1472quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1473 cmd_rmfiles = rm -f $(rm-files) 1474 1475# Run depmod only if we have System.map and depmod is executable 1476quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1477 cmd_depmod = \ 1478 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1479 $(DEPMOD) -ae -F System.map \ 1480 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1481 $(KERNELRELEASE); \ 1482 fi 1483 1484# Create temporary dir for module support files 1485# clean it up only when building all modules 1486cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1487 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1488 1489a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1490 $(KBUILD_AFLAGS_KERNEL) \ 1491 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1492 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1493 1494quiet_cmd_as_o_S = AS $@ 1495cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1496 1497# read all saved command lines 1498 1499targets := $(wildcard $(sort $(targets))) 1500cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1501 1502ifneq ($(cmd_files),) 1503 $(cmd_files): ; # Do not try to update included dependency files 1504 include $(cmd_files) 1505endif 1506 1507# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1508# Usage: 1509# $(Q)$(MAKE) $(clean)=dir 1510clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1511 1512endif # skip-makefile 1513 1514PHONY += FORCE 1515FORCE: 1516 1517# Declare the contents of the .PHONY variable as phony. We keep that 1518# information in a variable so we can use it in if_changed and friends. 1519.PHONY: $(PHONY) 1520