1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 36 4EXTRAVERSION = -rc7 5NAME = Sheep on Meth 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 571ifdef CONFIG_DYNAMIC_FTRACE 572 ifdef CONFIG_HAVE_C_RECORDMCOUNT 573 BUILD_C_RECORDMCOUNT := y 574 export BUILD_C_RECORDMCOUNT 575 endif 576endif 577endif 578 579# We trigger additional mismatches with less inlining 580ifdef CONFIG_DEBUG_SECTION_MISMATCH 581KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 582endif 583 584# arch Makefile may override CC so keep this after arch Makefile is included 585NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 586CHECKFLAGS += $(NOSTDINC_FLAGS) 587 588# warn about C99 declaration after statement 589KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 590 591# disable pointer signed / unsigned warnings in gcc 4.0 592KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 593 594# disable invalid "can't wrap" optimizations for signed / pointers 595KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 596 597# conserve stack if available 598KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 599 600# check for 'asm goto' 601ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 602 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 603endif 604 605# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 606# But warn user when we do so 607warn-assign = \ 608$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 609 610ifneq ($(KCPPFLAGS),) 611 $(call warn-assign,CPPFLAGS) 612 KBUILD_CPPFLAGS += $(KCPPFLAGS) 613endif 614ifneq ($(KAFLAGS),) 615 $(call warn-assign,AFLAGS) 616 KBUILD_AFLAGS += $(KAFLAGS) 617endif 618ifneq ($(KCFLAGS),) 619 $(call warn-assign,CFLAGS) 620 KBUILD_CFLAGS += $(KCFLAGS) 621endif 622 623# Use --build-id when available. 624LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 625 $(call cc-ldoption, -Wl$(comma)--build-id,)) 626KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 627LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 628 629ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 630LDFLAGS_vmlinux += $(call ld-option, -X,) 631endif 632 633# Default kernel image to build when no specific target is given. 634# KBUILD_IMAGE may be overruled on the command line or 635# set in the environment 636# Also any assignments in arch/$(ARCH)/Makefile take precedence over 637# this default value 638export KBUILD_IMAGE ?= vmlinux 639 640# 641# INSTALL_PATH specifies where to place the updated kernel and system map 642# images. Default is /boot, but you can set it to other values 643export INSTALL_PATH ?= /boot 644 645# 646# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 647# relocations required by build roots. This is not defined in the 648# makefile but the argument can be passed to make if needed. 649# 650 651MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 652export MODLIB 653 654# 655# INSTALL_MOD_STRIP, if defined, will cause modules to be 656# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 657# the default option --strip-debug will be used. Otherwise, 658# INSTALL_MOD_STRIP will used as the options to the strip command. 659 660ifdef INSTALL_MOD_STRIP 661ifeq ($(INSTALL_MOD_STRIP),1) 662mod_strip_cmd = $(STRIP) --strip-debug 663else 664mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 665endif # INSTALL_MOD_STRIP=1 666else 667mod_strip_cmd = true 668endif # INSTALL_MOD_STRIP 669export mod_strip_cmd 670 671 672ifeq ($(KBUILD_EXTMOD),) 673core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 674 675vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 676 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 677 $(net-y) $(net-m) $(libs-y) $(libs-m))) 678 679vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 680 $(init-n) $(init-) \ 681 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 682 $(net-n) $(net-) $(libs-n) $(libs-)))) 683 684init-y := $(patsubst %/, %/built-in.o, $(init-y)) 685core-y := $(patsubst %/, %/built-in.o, $(core-y)) 686drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 687net-y := $(patsubst %/, %/built-in.o, $(net-y)) 688libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 689libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 690libs-y := $(libs-y1) $(libs-y2) 691 692# Build vmlinux 693# --------------------------------------------------------------------------- 694# vmlinux is built from the objects selected by $(vmlinux-init) and 695# $(vmlinux-main). Most are built-in.o files from top-level directories 696# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 697# Ordering when linking is important, and $(vmlinux-init) must be first. 698# 699# vmlinux 700# ^ 701# | 702# +-< $(vmlinux-init) 703# | +--< init/version.o + more 704# | 705# +--< $(vmlinux-main) 706# | +--< driver/built-in.o mm/built-in.o + more 707# | 708# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 709# 710# vmlinux version (uname -v) cannot be updated during normal 711# descending-into-subdirs phase since we do not yet know if we need to 712# update vmlinux. 713# Therefore this step is delayed until just before final link of vmlinux - 714# except in the kallsyms case where it is done just before adding the 715# symbols to the kernel. 716# 717# System.map is generated to document addresses of all kernel symbols 718 719vmlinux-init := $(head-y) $(init-y) 720vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 721vmlinux-all := $(vmlinux-init) $(vmlinux-main) 722vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 723export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 724 725# Rule to link vmlinux - also used during CONFIG_KALLSYMS 726# May be overridden by arch/$(ARCH)/Makefile 727quiet_cmd_vmlinux__ ?= LD $@ 728 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 729 -T $(vmlinux-lds) $(vmlinux-init) \ 730 --start-group $(vmlinux-main) --end-group \ 731 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 732 733# Generate new vmlinux version 734quiet_cmd_vmlinux_version = GEN .version 735 cmd_vmlinux_version = set -e; \ 736 if [ ! -r .version ]; then \ 737 rm -f .version; \ 738 echo 1 >.version; \ 739 else \ 740 mv .version .old_version; \ 741 expr 0$$(cat .old_version) + 1 >.version; \ 742 fi; \ 743 $(MAKE) $(build)=init 744 745# Generate System.map 746quiet_cmd_sysmap = SYSMAP 747 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 748 749# Link of vmlinux 750# If CONFIG_KALLSYMS is set .version is already updated 751# Generate System.map and verify that the content is consistent 752# Use + in front of the vmlinux_version rule to silent warning with make -j2 753# First command is ':' to allow us to use + in front of the rule 754define rule_vmlinux__ 755 : 756 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 757 758 $(call cmd,vmlinux__) 759 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 760 761 $(Q)$(if $($(quiet)cmd_sysmap), \ 762 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 763 $(cmd_sysmap) $@ System.map; \ 764 if [ $$? -ne 0 ]; then \ 765 rm -f $@; \ 766 /bin/false; \ 767 fi; 768 $(verify_kallsyms) 769endef 770 771 772ifdef CONFIG_KALLSYMS 773# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 774# It's a three stage process: 775# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 776# empty 777# Running kallsyms on that gives us .tmp_kallsyms1.o with 778# the right size - vmlinux version (uname -v) is updated during this step 779# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 780# but due to the added section, some addresses have shifted. 781# From here, we generate a correct .tmp_kallsyms2.o 782# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 783# o Verify that the System.map from vmlinux matches the map from 784# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 785# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 786# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 787# temporary bypass to allow the kernel to be built while the 788# maintainers work out what went wrong with kallsyms. 789 790ifdef CONFIG_KALLSYMS_EXTRA_PASS 791last_kallsyms := 3 792else 793last_kallsyms := 2 794endif 795 796kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 797 798define verify_kallsyms 799 $(Q)$(if $($(quiet)cmd_sysmap), \ 800 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 801 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 802 $(Q)cmp -s System.map .tmp_System.map || \ 803 (echo Inconsistent kallsyms data; \ 804 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 805 rm .tmp_kallsyms* ; /bin/false ) 806endef 807 808# Update vmlinux version before link 809# Use + in front of this rule to silent warning about make -j1 810# First command is ':' to allow us to use + in front of this rule 811cmd_ksym_ld = $(cmd_vmlinux__) 812define rule_ksym_ld 813 : 814 +$(call cmd,vmlinux_version) 815 $(call cmd,vmlinux__) 816 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 817endef 818 819# Generate .S file with all kernel symbols 820quiet_cmd_kallsyms = KSYM $@ 821 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 822 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 823 824.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 825 $(call if_changed_dep,as_o_S) 826 827.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 828 $(call cmd,kallsyms) 829 830# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 831.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 832 $(call if_changed_rule,ksym_ld) 833 834.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 835 $(call if_changed,vmlinux__) 836 837.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 838 $(call if_changed,vmlinux__) 839 840# Needs to visit scripts/ before $(KALLSYMS) can be used. 841$(KALLSYMS): scripts ; 842 843# Generate some data for debugging strange kallsyms problems 844debug_kallsyms: .tmp_map$(last_kallsyms) 845 846.tmp_map%: .tmp_vmlinux% FORCE 847 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 848 849.tmp_map3: .tmp_map2 850 851.tmp_map2: .tmp_map1 852 853endif # ifdef CONFIG_KALLSYMS 854 855# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 856# relevant sections renamed as per the linker script. 857quiet_cmd_vmlinux-modpost = LD $@ 858 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 859 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 860 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 861define rule_vmlinux-modpost 862 : 863 +$(call cmd,vmlinux-modpost) 864 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 865 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 866endef 867 868# vmlinux image - including updated kernel symbols 869vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 870ifdef CONFIG_HEADERS_CHECK 871 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 872endif 873ifdef CONFIG_SAMPLES 874 $(Q)$(MAKE) $(build)=samples 875endif 876ifdef CONFIG_BUILD_DOCSRC 877 $(Q)$(MAKE) $(build)=Documentation 878endif 879 $(call vmlinux-modpost) 880 $(call if_changed_rule,vmlinux__) 881 $(Q)rm -f .old_version 882 883# build vmlinux.o first to catch section mismatch errors early 884ifdef CONFIG_KALLSYMS 885.tmp_vmlinux1: vmlinux.o 886endif 887 888modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 889vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 890 $(call if_changed_rule,vmlinux-modpost) 891 892# The actual objects are generated when descending, 893# make sure no implicit rule kicks in 894$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 895 896# Handle descending into subdirectories listed in $(vmlinux-dirs) 897# Preset locale variables to speed up the build process. Limit locale 898# tweaks to this spot to avoid wrong language settings when running 899# make menuconfig etc. 900# Error messages still appears in the original language 901 902PHONY += $(vmlinux-dirs) 903$(vmlinux-dirs): prepare scripts 904 $(Q)$(MAKE) $(build)=$@ 905 906# Store (new) KERNELRELASE string in include/config/kernel.release 907include/config/kernel.release: include/config/auto.conf FORCE 908 $(Q)rm -f $@ 909 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@ 910 911 912# Things we need to do before we recursively start building the kernel 913# or the modules are listed in "prepare". 914# A multi level approach is used. prepareN is processed before prepareN-1. 915# archprepare is used in arch Makefiles and when processed asm symlink, 916# version.h and scripts_basic is processed / created. 917 918# Listed in dependency order 919PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 920 921# prepare3 is used to check if we are building in a separate output directory, 922# and if so do: 923# 1) Check that make has not been executed in the kernel src $(srctree) 924prepare3: include/config/kernel.release 925ifneq ($(KBUILD_SRC),) 926 @$(kecho) ' Using $(srctree) as source for kernel' 927 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 928 echo " $(srctree) is not clean, please run 'make mrproper'";\ 929 echo " in the '$(srctree)' directory.";\ 930 /bin/false; \ 931 fi; 932endif 933 934# prepare2 creates a makefile if using a separate output directory 935prepare2: prepare3 outputmakefile 936 937prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ 938 include/config/auto.conf 939 $(cmd_crmodverdir) 940 941archprepare: prepare1 scripts_basic 942 943prepare0: archprepare FORCE 944 $(Q)$(MAKE) $(build)=. 945 $(Q)$(MAKE) $(build)=. missing-syscalls 946 947# All the preparing.. 948prepare: prepare0 949 950# Generate some files 951# --------------------------------------------------------------------------- 952 953# KERNELRELEASE can change from a few different places, meaning version.h 954# needs to be updated, so this check is forced on all builds 955 956uts_len := 64 957define filechk_utsrelease.h 958 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 959 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 960 exit 1; \ 961 fi; \ 962 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 963endef 964 965define filechk_version.h 966 (echo \#define LINUX_VERSION_CODE $(shell \ 967 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 968 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 969endef 970 971include/linux/version.h: $(srctree)/Makefile FORCE 972 $(call filechk,version.h) 973 974include/generated/utsrelease.h: include/config/kernel.release FORCE 975 $(call filechk,utsrelease.h) 976 977PHONY += headerdep 978headerdep: 979 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 980 981# --------------------------------------------------------------------------- 982 983PHONY += depend dep 984depend dep: 985 @echo '*** Warning: make $@ is unnecessary now.' 986 987# --------------------------------------------------------------------------- 988# Firmware install 989INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 990export INSTALL_FW_PATH 991 992PHONY += firmware_install 993firmware_install: FORCE 994 @mkdir -p $(objtree)/firmware 995 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 996 997# --------------------------------------------------------------------------- 998# Kernel headers 999 1000#Default location for installed headers 1001export INSTALL_HDR_PATH = $(objtree)/usr 1002 1003hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1004 1005# If we do an all arch process set dst to asm-$(hdr-arch) 1006hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1007 1008PHONY += __headers 1009__headers: include/linux/version.h scripts_basic FORCE 1010 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1011 1012PHONY += headers_install_all 1013headers_install_all: 1014 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1015 1016PHONY += headers_install 1017headers_install: __headers 1018 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ 1019 $(error Headers not exportable for the $(SRCARCH) architecture)) 1020 $(Q)$(MAKE) $(hdr-inst)=include 1021 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) 1022 1023PHONY += headers_check_all 1024headers_check_all: headers_install_all 1025 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1026 1027PHONY += headers_check 1028headers_check: headers_install 1029 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1030 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 1031 1032# --------------------------------------------------------------------------- 1033# Modules 1034 1035ifdef CONFIG_MODULES 1036 1037# By default, build modules as well 1038 1039all: modules 1040 1041# Build modules 1042# 1043# A module can be listed more than once in obj-m resulting in 1044# duplicate lines in modules.order files. Those are removed 1045# using awk while concatenating to the final file. 1046 1047PHONY += modules 1048modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 1049 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1050 @$(kecho) ' Building modules, stage 2.'; 1051 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1052 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1053 1054modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 1055 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 1056 1057%/modules.builtin: include/config/auto.conf 1058 $(Q)$(MAKE) $(modbuiltin)=$* 1059 1060 1061# Target to prepare building external modules 1062PHONY += modules_prepare 1063modules_prepare: prepare scripts 1064 1065# Target to install modules 1066PHONY += modules_install 1067modules_install: _modinst_ _modinst_post 1068 1069PHONY += _modinst_ 1070_modinst_: 1071 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1072 echo "Warning: you may need to install module-init-tools"; \ 1073 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1074 sleep 1; \ 1075 fi 1076 @rm -rf $(MODLIB)/kernel 1077 @rm -f $(MODLIB)/source 1078 @mkdir -p $(MODLIB)/kernel 1079 @ln -s $(srctree) $(MODLIB)/source 1080 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1081 rm -f $(MODLIB)/build ; \ 1082 ln -s $(objtree) $(MODLIB)/build ; \ 1083 fi 1084 @cp -f $(objtree)/modules.order $(MODLIB)/ 1085 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1086 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1087 1088# This depmod is only for convenience to give the initial 1089# boot a modules.dep even before / is mounted read-write. However the 1090# boot script depmod is the master version. 1091PHONY += _modinst_post 1092_modinst_post: _modinst_ 1093 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1094 $(call cmd,depmod) 1095 1096else # CONFIG_MODULES 1097 1098# Modules not configured 1099# --------------------------------------------------------------------------- 1100 1101modules modules_install: FORCE 1102 @echo 1103 @echo "The present kernel configuration has modules disabled." 1104 @echo "Type 'make config' and enable loadable module support." 1105 @echo "Then build a kernel with module support enabled." 1106 @echo 1107 @exit 1 1108 1109endif # CONFIG_MODULES 1110 1111### 1112# Cleaning is done on three levels. 1113# make clean Delete most generated files 1114# Leave enough to build external modules 1115# make mrproper Delete the current configuration, and all generated files 1116# make distclean Remove editor backup files, patch leftover files and the like 1117 1118# Directories & files removed with 'make clean' 1119CLEAN_DIRS += $(MODVERDIR) 1120CLEAN_FILES += vmlinux System.map \ 1121 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1122 1123# Directories & files removed with 'make mrproper' 1124MRPROPER_DIRS += include/config usr/include include/generated 1125MRPROPER_FILES += .config .config.old .version .old_version \ 1126 include/linux/version.h \ 1127 Module.symvers tags TAGS cscope* 1128 1129# clean - Delete most, but leave enough to build external modules 1130# 1131clean: rm-dirs := $(CLEAN_DIRS) 1132clean: rm-files := $(CLEAN_FILES) 1133clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1134 1135PHONY += $(clean-dirs) clean archclean 1136$(clean-dirs): 1137 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1138 1139clean: archclean $(clean-dirs) 1140 $(call cmd,rmdirs) 1141 $(call cmd,rmfiles) 1142 @find . $(RCS_FIND_IGNORE) \ 1143 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1144 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1145 -o -name '*.symtypes' -o -name 'modules.order' \ 1146 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1147 -o -name '*.gcno' \) -type f -print | xargs rm -f 1148 1149# mrproper - Delete all generated files, including .config 1150# 1151mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1152mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1153mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1154 1155PHONY += $(mrproper-dirs) mrproper archmrproper 1156$(mrproper-dirs): 1157 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1158 1159mrproper: clean archmrproper $(mrproper-dirs) 1160 $(call cmd,rmdirs) 1161 $(call cmd,rmfiles) 1162 1163# distclean 1164# 1165PHONY += distclean 1166 1167distclean: mrproper 1168 @find $(srctree) $(RCS_FIND_IGNORE) \ 1169 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1170 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1171 -o -name '.*.rej' -o -size 0 \ 1172 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1173 -type f -print | xargs rm -f 1174 1175 1176# Packaging of the kernel to various formats 1177# --------------------------------------------------------------------------- 1178# rpm target kept for backward compatibility 1179package-dir := $(srctree)/scripts/package 1180 1181%src-pkg: FORCE 1182 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1183%pkg: include/config/kernel.release FORCE 1184 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1185rpm: include/config/kernel.release FORCE 1186 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1187 1188 1189# Brief documentation of the typical targets used 1190# --------------------------------------------------------------------------- 1191 1192boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1193boards := $(notdir $(boards)) 1194board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1195board-dirs := $(sort $(notdir $(board-dirs:/=))) 1196 1197help: 1198 @echo 'Cleaning targets:' 1199 @echo ' clean - Remove most generated files but keep the config and' 1200 @echo ' enough build support to build external modules' 1201 @echo ' mrproper - Remove all generated files + config + various backup files' 1202 @echo ' distclean - mrproper + remove editor backup and patch files' 1203 @echo '' 1204 @echo 'Configuration targets:' 1205 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1206 @echo '' 1207 @echo 'Other generic targets:' 1208 @echo ' all - Build all targets marked with [*]' 1209 @echo '* vmlinux - Build the bare kernel' 1210 @echo '* modules - Build all modules' 1211 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1212 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1213 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1214 @echo ' dir/ - Build all files in dir and below' 1215 @echo ' dir/file.[oisS] - Build specified target only' 1216 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1217 @echo ' (requires a recent binutils and recent build (System.map))' 1218 @echo ' dir/file.ko - Build module including final link' 1219 @echo ' modules_prepare - Set up for building external modules' 1220 @echo ' tags/TAGS - Generate tags file for editors' 1221 @echo ' cscope - Generate cscope index' 1222 @echo ' kernelrelease - Output the release version string' 1223 @echo ' kernelversion - Output the version stored in Makefile' 1224 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1225 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1226 echo '' 1227 @echo 'Static analysers' 1228 @echo ' checkstack - Generate a list of stack hogs' 1229 @echo ' namespacecheck - Name space analysis on compiled kernel' 1230 @echo ' versioncheck - Sanity check on version.h usage' 1231 @echo ' includecheck - Check for duplicate included header files' 1232 @echo ' export_report - List the usages of all exported symbols' 1233 @echo ' headers_check - Sanity check on exported headers' 1234 @echo ' headerdep - Detect inclusion cycles in headers' 1235 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1236 @echo '' 1237 @echo 'Kernel packaging:' 1238 @$(MAKE) $(build)=$(package-dir) help 1239 @echo '' 1240 @echo 'Documentation targets:' 1241 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1242 @echo '' 1243 @echo 'Architecture specific targets ($(SRCARCH)):' 1244 @$(if $(archhelp),$(archhelp),\ 1245 echo ' No architecture specific help defined for $(SRCARCH)') 1246 @echo '' 1247 @$(if $(boards), \ 1248 $(foreach b, $(boards), \ 1249 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1250 echo '') 1251 @$(if $(board-dirs), \ 1252 $(foreach b, $(board-dirs), \ 1253 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1254 printf " %-16s - Show all of the above\\n" help-boards; \ 1255 echo '') 1256 1257 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1258 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1259 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1260 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1261 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1262 @echo '' 1263 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1264 @echo 'For further info see the ./README file' 1265 1266 1267help-board-dirs := $(addprefix help-,$(board-dirs)) 1268 1269help-boards: $(help-board-dirs) 1270 1271boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1272 1273$(help-board-dirs): help-%: 1274 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1275 @$(if $(boards-per-dir), \ 1276 $(foreach b, $(boards-per-dir), \ 1277 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1278 echo '') 1279 1280 1281# Documentation targets 1282# --------------------------------------------------------------------------- 1283%docs: scripts_basic FORCE 1284 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1285 1286else # KBUILD_EXTMOD 1287 1288### 1289# External module support. 1290# When building external modules the kernel used as basis is considered 1291# read-only, and no consistency checks are made and the make 1292# system is not used on the basis kernel. If updates are required 1293# in the basis kernel ordinary make commands (without M=...) must 1294# be used. 1295# 1296# The following are the only valid targets when building external 1297# modules. 1298# make M=dir clean Delete all automatically generated files 1299# make M=dir modules Make all modules in specified dir 1300# make M=dir Same as 'make M=dir modules' 1301# make M=dir modules_install 1302# Install the modules built in the module directory 1303# Assumes install directory is already created 1304 1305# We are always building modules 1306KBUILD_MODULES := 1 1307PHONY += crmodverdir 1308crmodverdir: 1309 $(cmd_crmodverdir) 1310 1311PHONY += $(objtree)/Module.symvers 1312$(objtree)/Module.symvers: 1313 @test -e $(objtree)/Module.symvers || ( \ 1314 echo; \ 1315 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1316 echo " is missing; modules will have no dependencies and modversions."; \ 1317 echo ) 1318 1319module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1320PHONY += $(module-dirs) modules 1321$(module-dirs): crmodverdir $(objtree)/Module.symvers 1322 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1323 1324modules: $(module-dirs) 1325 @$(kecho) ' Building modules, stage 2.'; 1326 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1327 1328PHONY += modules_install 1329modules_install: _emodinst_ _emodinst_post 1330 1331install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1332PHONY += _emodinst_ 1333_emodinst_: 1334 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1335 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1336 1337PHONY += _emodinst_post 1338_emodinst_post: _emodinst_ 1339 $(call cmd,depmod) 1340 1341clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1342 1343PHONY += $(clean-dirs) clean 1344$(clean-dirs): 1345 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1346 1347clean: rm-dirs := $(MODVERDIR) 1348clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ 1349 $(KBUILD_EXTMOD)/modules.order \ 1350 $(KBUILD_EXTMOD)/modules.builtin 1351clean: $(clean-dirs) 1352 $(call cmd,rmdirs) 1353 $(call cmd,rmfiles) 1354 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1355 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1356 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1357 -o -name '*.gcno' \) -type f -print | xargs rm -f 1358 1359help: 1360 @echo ' Building external modules.' 1361 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1362 @echo '' 1363 @echo ' modules - default target, build the module(s)' 1364 @echo ' modules_install - install the module' 1365 @echo ' clean - remove generated files in module directory only' 1366 @echo '' 1367 1368# Dummies... 1369PHONY += prepare scripts 1370prepare: ; 1371scripts: ; 1372endif # KBUILD_EXTMOD 1373 1374# Generate tags for editors 1375# --------------------------------------------------------------------------- 1376quiet_cmd_tags = GEN $@ 1377 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1378 1379tags TAGS cscope: FORCE 1380 $(call cmd,tags) 1381 1382# Scripts to check various things for consistency 1383# --------------------------------------------------------------------------- 1384 1385includecheck: 1386 find * $(RCS_FIND_IGNORE) \ 1387 -name '*.[hcS]' -type f -print | sort \ 1388 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1389 1390versioncheck: 1391 find * $(RCS_FIND_IGNORE) \ 1392 -name '*.[hcS]' -type f -print | sort \ 1393 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1394 1395coccicheck: 1396 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1397 1398namespacecheck: 1399 $(PERL) $(srctree)/scripts/namespace.pl 1400 1401export_report: 1402 $(PERL) $(srctree)/scripts/export_report.pl 1403 1404endif #ifeq ($(config-targets),1) 1405endif #ifeq ($(mixed-targets),1) 1406 1407PHONY += checkstack kernelrelease kernelversion 1408 1409# UML needs a little special treatment here. It wants to use the host 1410# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1411# else wants $(ARCH), including people doing cross-builds, which means 1412# that $(SUBARCH) doesn't work here. 1413ifeq ($(ARCH), um) 1414CHECKSTACK_ARCH := $(SUBARCH) 1415else 1416CHECKSTACK_ARCH := $(ARCH) 1417endif 1418checkstack: 1419 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1420 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1421 1422kernelrelease: 1423 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1424 1425kernelversion: 1426 @echo $(KERNELVERSION) 1427 1428# Single targets 1429# --------------------------------------------------------------------------- 1430# Single targets are compatible with: 1431# - build with mixed source and output 1432# - build with separate output dir 'make O=...' 1433# - external modules 1434# 1435# target-dir => where to store outputfile 1436# build-dir => directory in kernel source tree to use 1437 1438ifeq ($(KBUILD_EXTMOD),) 1439 build-dir = $(patsubst %/,%,$(dir $@)) 1440 target-dir = $(dir $@) 1441else 1442 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1443 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1444 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1445endif 1446 1447%.s: %.c prepare scripts FORCE 1448 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1449%.i: %.c prepare scripts FORCE 1450 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1451%.o: %.c prepare scripts FORCE 1452 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1453%.lst: %.c prepare scripts FORCE 1454 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1455%.s: %.S prepare scripts FORCE 1456 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1457%.o: %.S prepare scripts FORCE 1458 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1459%.symtypes: %.c prepare scripts FORCE 1460 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1461 1462# Modules 1463/: prepare scripts FORCE 1464 $(cmd_crmodverdir) 1465 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1466 $(build)=$(build-dir) 1467%/: prepare scripts FORCE 1468 $(cmd_crmodverdir) 1469 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1470 $(build)=$(build-dir) 1471%.ko: prepare scripts FORCE 1472 $(cmd_crmodverdir) 1473 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1474 $(build)=$(build-dir) $(@:.ko=.o) 1475 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1476 1477# FIXME Should go into a make.lib or something 1478# =========================================================================== 1479 1480quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1481 cmd_rmdirs = rm -rf $(rm-dirs) 1482 1483quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1484 cmd_rmfiles = rm -f $(rm-files) 1485 1486# Run depmod only if we have System.map and depmod is executable 1487quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1488 cmd_depmod = \ 1489 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1490 $(DEPMOD) -ae -F System.map \ 1491 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1492 $(KERNELRELEASE); \ 1493 fi 1494 1495# Create temporary dir for module support files 1496# clean it up only when building all modules 1497cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1498 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1499 1500a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1501 $(KBUILD_AFLAGS_KERNEL) \ 1502 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1503 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1504 1505quiet_cmd_as_o_S = AS $@ 1506cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1507 1508# read all saved command lines 1509 1510targets := $(wildcard $(sort $(targets))) 1511cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1512 1513ifneq ($(cmd_files),) 1514 $(cmd_files): ; # Do not try to update included dependency files 1515 include $(cmd_files) 1516endif 1517 1518# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1519# Usage: 1520# $(Q)$(MAKE) $(clean)=dir 1521clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1522 1523endif # skip-makefile 1524 1525PHONY += FORCE 1526FORCE: 1527 1528# Declare the contents of the .PHONY variable as phony. We keep that 1529# information in a variable so we can use it in if_changed and friends. 1530.PHONY: $(PHONY) 1531