1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 34 4EXTRAVERSION = .1 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# Default value for CROSS_COMPILE is not to prefix executables 187# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 188export KBUILD_BUILDHOST := $(SUBARCH) 189ARCH ?= $(SUBARCH) 190CROSS_COMPILE ?= 191 192# Architecture as present in compile.h 193UTS_MACHINE := $(ARCH) 194SRCARCH := $(ARCH) 195 196# Additional ARCH settings for x86 197ifeq ($(ARCH),i386) 198 SRCARCH := x86 199endif 200ifeq ($(ARCH),x86_64) 201 SRCARCH := x86 202endif 203 204# Additional ARCH settings for sparc 205ifeq ($(ARCH),sparc64) 206 SRCARCH := sparc 207endif 208 209# Additional ARCH settings for sh 210ifeq ($(ARCH),sh64) 211 SRCARCH := sh 212endif 213 214# Where to locate arch specific headers 215hdr-arch := $(SRCARCH) 216 217ifeq ($(ARCH),m68knommu) 218 hdr-arch := m68k 219endif 220 221KCONFIG_CONFIG ?= .config 222 223# SHELL used by kbuild 224CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 225 else if [ -x /bin/bash ]; then echo /bin/bash; \ 226 else echo sh; fi ; fi) 227 228HOSTCC = gcc 229HOSTCXX = g++ 230HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 231HOSTCXXFLAGS = -O2 232 233# Decide whether to build built-in, modular, or both. 234# Normally, just do built-in. 235 236KBUILD_MODULES := 237KBUILD_BUILTIN := 1 238 239# If we have only "make modules", don't compile built-in objects. 240# When we're building modules with modversions, we need to consider 241# the built-in objects during the descend as well, in order to 242# make sure the checksums are up to date before we record them. 243 244ifeq ($(MAKECMDGOALS),modules) 245 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 246endif 247 248# If we have "make <whatever> modules", compile modules 249# in addition to whatever we do anyway. 250# Just "make" or "make all" shall build modules as well 251 252ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 253 KBUILD_MODULES := 1 254endif 255 256ifeq ($(MAKECMDGOALS),) 257 KBUILD_MODULES := 1 258endif 259 260export KBUILD_MODULES KBUILD_BUILTIN 261export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 262 263# Beautify output 264# --------------------------------------------------------------------------- 265# 266# Normally, we echo the whole command before executing it. By making 267# that echo $($(quiet)$(cmd)), we now have the possibility to set 268# $(quiet) to choose other forms of output instead, e.g. 269# 270# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 271# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 272# 273# If $(quiet) is empty, the whole command will be printed. 274# If it is set to "quiet_", only the short version will be printed. 275# If it is set to "silent_", nothing will be printed at all, since 276# the variable $(silent_cmd_cc_o_c) doesn't exist. 277# 278# A simple variant is to prefix commands with $(Q) - that's useful 279# for commands that shall be hidden in non-verbose mode. 280# 281# $(Q)ln $@ :< 282# 283# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 284# If KBUILD_VERBOSE equals 1 then the above command is displayed. 285 286ifeq ($(KBUILD_VERBOSE),1) 287 quiet = 288 Q = 289else 290 quiet=quiet_ 291 Q = @ 292endif 293 294# If the user is running make -s (silent mode), suppress echoing of 295# commands 296 297ifneq ($(findstring s,$(MAKEFLAGS)),) 298 quiet=silent_ 299endif 300 301export quiet Q KBUILD_VERBOSE 302 303 304# Look for make include files relative to root of kernel src 305MAKEFLAGS += --include-dir=$(srctree) 306 307# We need some generic definitions (do not try to remake the file). 308$(srctree)/scripts/Kbuild.include: ; 309include $(srctree)/scripts/Kbuild.include 310 311# Make variables (CC, etc...) 312 313AS = $(CROSS_COMPILE)as 314LD = $(CROSS_COMPILE)ld 315CC = $(CROSS_COMPILE)gcc 316CPP = $(CC) -E 317AR = $(CROSS_COMPILE)ar 318NM = $(CROSS_COMPILE)nm 319STRIP = $(CROSS_COMPILE)strip 320OBJCOPY = $(CROSS_COMPILE)objcopy 321OBJDUMP = $(CROSS_COMPILE)objdump 322AWK = awk 323GENKSYMS = scripts/genksyms/genksyms 324INSTALLKERNEL := installkernel 325DEPMOD = /sbin/depmod 326KALLSYMS = scripts/kallsyms 327PERL = perl 328CHECK = sparse 329 330CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 331 -Wbitwise -Wno-return-void $(CF) 332MODFLAGS = -DMODULE 333CFLAGS_MODULE = $(MODFLAGS) 334AFLAGS_MODULE = $(MODFLAGS) 335LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds 336CFLAGS_KERNEL = 337AFLAGS_KERNEL = 338CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 339 340 341# Use LINUXINCLUDE when you must reference the include/ directory. 342# Needed to be compatible with the O= option 343LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \ 344 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 345 -include include/generated/autoconf.h 346 347KBUILD_CPPFLAGS := -D__KERNEL__ 348 349KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 350 -fno-strict-aliasing -fno-common \ 351 -Werror-implicit-function-declaration \ 352 -Wno-format-security \ 353 -fno-delete-null-pointer-checks 354KBUILD_AFLAGS := -D__ASSEMBLY__ 355 356# Read KERNELRELEASE from include/config/kernel.release (if it exists) 357KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 358KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 359 360export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 361export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 362export CPP AR NM STRIP OBJCOPY OBJDUMP 363export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 364export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 365 366export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 367export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 368export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 369 370# When compiling out-of-tree modules, put MODVERDIR in the module 371# tree rather than in the kernel tree. The kernel tree might 372# even be read-only. 373export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 374 375# Files to ignore in find ... statements 376 377RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 378export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 379 380# =========================================================================== 381# Rules shared between *config targets and build targets 382 383# Basic helpers built in scripts/ 384PHONY += scripts_basic 385scripts_basic: 386 $(Q)$(MAKE) $(build)=scripts/basic 387 $(Q)rm -f .tmp_quiet_recordmcount 388 389# To avoid any implicit rule to kick in, define an empty command. 390scripts/basic/%: scripts_basic ; 391 392PHONY += outputmakefile 393# outputmakefile generates a Makefile in the output directory, if using a 394# separate output directory. This allows convenient use of make in the 395# output directory. 396outputmakefile: 397ifneq ($(KBUILD_SRC),) 398 $(Q)ln -fsn $(srctree) source 399 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 400 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 401endif 402 403# To make sure we do not include .config for any of the *config targets 404# catch them early, and hand them over to scripts/kconfig/Makefile 405# It is allowed to specify more targets when calling make, including 406# mixing *config targets and build targets. 407# For example 'make oldconfig all'. 408# Detect when mixed targets is specified, and make a second invocation 409# of make so .config is not included in this case either (for *config). 410 411no-dot-config-targets := clean mrproper distclean \ 412 cscope TAGS tags help %docs check% \ 413 include/linux/version.h headers_% \ 414 kernelrelease kernelversion 415 416config-targets := 0 417mixed-targets := 0 418dot-config := 1 419 420ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 421 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 422 dot-config := 0 423 endif 424endif 425 426ifeq ($(KBUILD_EXTMOD),) 427 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 428 config-targets := 1 429 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 430 mixed-targets := 1 431 endif 432 endif 433endif 434 435ifeq ($(mixed-targets),1) 436# =========================================================================== 437# We're called with mixed targets (*config and build targets). 438# Handle them one by one. 439 440%:: FORCE 441 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 442 443else 444ifeq ($(config-targets),1) 445# =========================================================================== 446# *config targets only - make sure prerequisites are updated, and descend 447# in scripts/kconfig to make the *config target 448 449# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 450# KBUILD_DEFCONFIG may point out an alternative default configuration 451# used for 'make defconfig' 452include $(srctree)/arch/$(SRCARCH)/Makefile 453export KBUILD_DEFCONFIG KBUILD_KCONFIG 454 455config: scripts_basic outputmakefile FORCE 456 $(Q)mkdir -p include/linux include/config 457 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 458 459%config: scripts_basic outputmakefile FORCE 460 $(Q)mkdir -p include/linux include/config 461 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 462 463else 464# =========================================================================== 465# Build targets only - this includes vmlinux, arch specific targets, clean 466# targets and others. In general all targets except *config targets. 467 468ifeq ($(KBUILD_EXTMOD),) 469# Additional helpers built in scripts/ 470# Carefully list dependencies so we do not try to build scripts twice 471# in parallel 472PHONY += scripts 473scripts: scripts_basic include/config/auto.conf include/config/tristate.conf 474 $(Q)$(MAKE) $(build)=$(@) 475 476# Objects we will link into vmlinux / subdirs we need to visit 477init-y := init/ 478drivers-y := drivers/ sound/ firmware/ 479net-y := net/ 480libs-y := lib/ 481core-y := usr/ 482endif # KBUILD_EXTMOD 483 484ifeq ($(dot-config),1) 485# Read in config 486-include include/config/auto.conf 487 488ifeq ($(KBUILD_EXTMOD),) 489# Read in dependencies to all Kconfig* files, make sure to run 490# oldconfig if changes are detected. 491-include include/config/auto.conf.cmd 492 493# To avoid any implicit rule to kick in, define an empty command 494$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 495 496# If .config is newer than include/config/auto.conf, someone tinkered 497# with it and forgot to run make oldconfig. 498# if auto.conf.cmd is missing then we are probably in a cleaned tree so 499# we execute the config step to be sure to catch updated Kconfig files 500include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 501 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 502else 503# external modules needs include/generated/autoconf.h and include/config/auto.conf 504# but do not care if they are up-to-date. Use auto.conf to trigger the test 505PHONY += include/config/auto.conf 506 507include/config/auto.conf: 508 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 509 echo; \ 510 echo " ERROR: Kernel configuration is invalid."; \ 511 echo " include/generated/autoconf.h or $@ are missing.";\ 512 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 513 echo; \ 514 /bin/false) 515 516endif # KBUILD_EXTMOD 517 518else 519# Dummy target needed, because used as prerequisite 520include/config/auto.conf: ; 521endif # $(dot-config) 522 523# The all: target is the default when no target is given on the 524# command line. 525# This allow a user to issue only 'make' to build a kernel including modules 526# Defaults vmlinux but it is usually overridden in the arch makefile 527all: vmlinux 528 529ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 530KBUILD_CFLAGS += -Os 531else 532KBUILD_CFLAGS += -O2 533endif 534 535include $(srctree)/arch/$(SRCARCH)/Makefile 536 537ifneq ($(CONFIG_FRAME_WARN),0) 538KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 539endif 540 541# Force gcc to behave correct even for buggy distributions 542ifndef CONFIG_CC_STACKPROTECTOR 543KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 544endif 545 546ifdef CONFIG_FRAME_POINTER 547KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 548else 549KBUILD_CFLAGS += -fomit-frame-pointer 550endif 551 552ifdef CONFIG_DEBUG_INFO 553KBUILD_CFLAGS += -g 554KBUILD_AFLAGS += -gdwarf-2 555endif 556 557ifdef CONFIG_FUNCTION_TRACER 558KBUILD_CFLAGS += -pg 559endif 560 561# We trigger additional mismatches with less inlining 562ifdef CONFIG_DEBUG_SECTION_MISMATCH 563KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 564endif 565 566# arch Makefile may override CC so keep this after arch Makefile is included 567NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 568CHECKFLAGS += $(NOSTDINC_FLAGS) 569 570# warn about C99 declaration after statement 571KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 572 573# disable pointer signed / unsigned warnings in gcc 4.0 574KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 575 576# disable invalid "can't wrap" optimizations for signed / pointers 577KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 578 579# revert to pre-gcc-4.4 behaviour of .eh_frame 580KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 581 582# conserve stack if available 583KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 584 585# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 586# But warn user when we do so 587warn-assign = \ 588$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 589 590ifneq ($(KCPPFLAGS),) 591 $(call warn-assign,CPPFLAGS) 592 KBUILD_CPPFLAGS += $(KCPPFLAGS) 593endif 594ifneq ($(KAFLAGS),) 595 $(call warn-assign,AFLAGS) 596 KBUILD_AFLAGS += $(KAFLAGS) 597endif 598ifneq ($(KCFLAGS),) 599 $(call warn-assign,CFLAGS) 600 KBUILD_CFLAGS += $(KCFLAGS) 601endif 602 603# Use --build-id when available. 604LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 605 $(call cc-ldoption, -Wl$(comma)--build-id,)) 606LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 607LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 608 609ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 610LDFLAGS_vmlinux += $(call ld-option, -X,) 611endif 612 613# Default kernel image to build when no specific target is given. 614# KBUILD_IMAGE may be overruled on the command line or 615# set in the environment 616# Also any assignments in arch/$(ARCH)/Makefile take precedence over 617# this default value 618export KBUILD_IMAGE ?= vmlinux 619 620# 621# INSTALL_PATH specifies where to place the updated kernel and system map 622# images. Default is /boot, but you can set it to other values 623export INSTALL_PATH ?= /boot 624 625# 626# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 627# relocations required by build roots. This is not defined in the 628# makefile but the argument can be passed to make if needed. 629# 630 631MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 632export MODLIB 633 634# 635# INSTALL_MOD_STRIP, if defined, will cause modules to be 636# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 637# the default option --strip-debug will be used. Otherwise, 638# INSTALL_MOD_STRIP will used as the options to the strip command. 639 640ifdef INSTALL_MOD_STRIP 641ifeq ($(INSTALL_MOD_STRIP),1) 642mod_strip_cmd = $(STRIP) --strip-debug 643else 644mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 645endif # INSTALL_MOD_STRIP=1 646else 647mod_strip_cmd = true 648endif # INSTALL_MOD_STRIP 649export mod_strip_cmd 650 651 652ifeq ($(KBUILD_EXTMOD),) 653core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 654 655vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 656 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 657 $(net-y) $(net-m) $(libs-y) $(libs-m))) 658 659vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 660 $(init-n) $(init-) \ 661 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 662 $(net-n) $(net-) $(libs-n) $(libs-)))) 663 664init-y := $(patsubst %/, %/built-in.o, $(init-y)) 665core-y := $(patsubst %/, %/built-in.o, $(core-y)) 666drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 667net-y := $(patsubst %/, %/built-in.o, $(net-y)) 668libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 669libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 670libs-y := $(libs-y1) $(libs-y2) 671 672# Build vmlinux 673# --------------------------------------------------------------------------- 674# vmlinux is built from the objects selected by $(vmlinux-init) and 675# $(vmlinux-main). Most are built-in.o files from top-level directories 676# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 677# Ordering when linking is important, and $(vmlinux-init) must be first. 678# 679# vmlinux 680# ^ 681# | 682# +-< $(vmlinux-init) 683# | +--< init/version.o + more 684# | 685# +--< $(vmlinux-main) 686# | +--< driver/built-in.o mm/built-in.o + more 687# | 688# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 689# 690# vmlinux version (uname -v) cannot be updated during normal 691# descending-into-subdirs phase since we do not yet know if we need to 692# update vmlinux. 693# Therefore this step is delayed until just before final link of vmlinux - 694# except in the kallsyms case where it is done just before adding the 695# symbols to the kernel. 696# 697# System.map is generated to document addresses of all kernel symbols 698 699vmlinux-init := $(head-y) $(init-y) 700vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 701vmlinux-all := $(vmlinux-init) $(vmlinux-main) 702vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 703export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 704 705# Rule to link vmlinux - also used during CONFIG_KALLSYMS 706# May be overridden by arch/$(ARCH)/Makefile 707quiet_cmd_vmlinux__ ?= LD $@ 708 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 709 -T $(vmlinux-lds) $(vmlinux-init) \ 710 --start-group $(vmlinux-main) --end-group \ 711 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 712 713# Generate new vmlinux version 714quiet_cmd_vmlinux_version = GEN .version 715 cmd_vmlinux_version = set -e; \ 716 if [ ! -r .version ]; then \ 717 rm -f .version; \ 718 echo 1 >.version; \ 719 else \ 720 mv .version .old_version; \ 721 expr 0$$(cat .old_version) + 1 >.version; \ 722 fi; \ 723 $(MAKE) $(build)=init 724 725# Generate System.map 726quiet_cmd_sysmap = SYSMAP 727 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 728 729# Link of vmlinux 730# If CONFIG_KALLSYMS is set .version is already updated 731# Generate System.map and verify that the content is consistent 732# Use + in front of the vmlinux_version rule to silent warning with make -j2 733# First command is ':' to allow us to use + in front of the rule 734define rule_vmlinux__ 735 : 736 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 737 738 $(call cmd,vmlinux__) 739 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 740 741 $(Q)$(if $($(quiet)cmd_sysmap), \ 742 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 743 $(cmd_sysmap) $@ System.map; \ 744 if [ $$? -ne 0 ]; then \ 745 rm -f $@; \ 746 /bin/false; \ 747 fi; 748 $(verify_kallsyms) 749endef 750 751 752ifdef CONFIG_KALLSYMS 753# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 754# It's a three stage process: 755# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 756# empty 757# Running kallsyms on that gives us .tmp_kallsyms1.o with 758# the right size - vmlinux version (uname -v) is updated during this step 759# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 760# but due to the added section, some addresses have shifted. 761# From here, we generate a correct .tmp_kallsyms2.o 762# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 763# o Verify that the System.map from vmlinux matches the map from 764# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 765# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 766# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 767# temporary bypass to allow the kernel to be built while the 768# maintainers work out what went wrong with kallsyms. 769 770ifdef CONFIG_KALLSYMS_EXTRA_PASS 771last_kallsyms := 3 772else 773last_kallsyms := 2 774endif 775 776kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 777 778define verify_kallsyms 779 $(Q)$(if $($(quiet)cmd_sysmap), \ 780 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 781 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 782 $(Q)cmp -s System.map .tmp_System.map || \ 783 (echo Inconsistent kallsyms data; \ 784 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 785 rm .tmp_kallsyms* ; /bin/false ) 786endef 787 788# Update vmlinux version before link 789# Use + in front of this rule to silent warning about make -j1 790# First command is ':' to allow us to use + in front of this rule 791cmd_ksym_ld = $(cmd_vmlinux__) 792define rule_ksym_ld 793 : 794 +$(call cmd,vmlinux_version) 795 $(call cmd,vmlinux__) 796 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 797endef 798 799# Generate .S file with all kernel symbols 800quiet_cmd_kallsyms = KSYM $@ 801 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 802 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 803 804.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 805 $(call if_changed_dep,as_o_S) 806 807.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 808 $(call cmd,kallsyms) 809 810# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 811.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 812 $(call if_changed_rule,ksym_ld) 813 814.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 815 $(call if_changed,vmlinux__) 816 817.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 818 $(call if_changed,vmlinux__) 819 820# Needs to visit scripts/ before $(KALLSYMS) can be used. 821$(KALLSYMS): scripts ; 822 823# Generate some data for debugging strange kallsyms problems 824debug_kallsyms: .tmp_map$(last_kallsyms) 825 826.tmp_map%: .tmp_vmlinux% FORCE 827 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 828 829.tmp_map3: .tmp_map2 830 831.tmp_map2: .tmp_map1 832 833endif # ifdef CONFIG_KALLSYMS 834 835# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 836# relevant sections renamed as per the linker script. 837quiet_cmd_vmlinux-modpost = LD $@ 838 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 839 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 840 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 841define rule_vmlinux-modpost 842 : 843 +$(call cmd,vmlinux-modpost) 844 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 845 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 846endef 847 848# vmlinux image - including updated kernel symbols 849vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 850ifdef CONFIG_HEADERS_CHECK 851 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 852endif 853ifdef CONFIG_SAMPLES 854 $(Q)$(MAKE) $(build)=samples 855endif 856ifdef CONFIG_BUILD_DOCSRC 857 $(Q)$(MAKE) $(build)=Documentation 858endif 859 $(call vmlinux-modpost) 860 $(call if_changed_rule,vmlinux__) 861 $(Q)rm -f .old_version 862 863# build vmlinux.o first to catch section mismatch errors early 864ifdef CONFIG_KALLSYMS 865.tmp_vmlinux1: vmlinux.o 866endif 867 868modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 869vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 870 $(call if_changed_rule,vmlinux-modpost) 871 872# The actual objects are generated when descending, 873# make sure no implicit rule kicks in 874$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 875 876# Handle descending into subdirectories listed in $(vmlinux-dirs) 877# Preset locale variables to speed up the build process. Limit locale 878# tweaks to this spot to avoid wrong language settings when running 879# make menuconfig etc. 880# Error messages still appears in the original language 881 882PHONY += $(vmlinux-dirs) 883$(vmlinux-dirs): prepare scripts 884 $(Q)$(MAKE) $(build)=$@ 885ifdef CONFIG_MODULES 886 $(Q)$(MAKE) $(modbuiltin)=$@ 887endif 888 889# Build the kernel release string 890# 891# The KERNELRELEASE value built here is stored in the file 892# include/config/kernel.release, and is used when executing several 893# make targets, such as "make install" or "make modules_install." 894# 895# The eventual kernel release string consists of the following fields, 896# shown in a hierarchical format to show how smaller parts are concatenated 897# to form the larger and final value, with values coming from places like 898# the Makefile, kernel config options, make command line options and/or 899# SCM tag information. 900# 901# $(KERNELVERSION) 902# $(VERSION) eg, 2 903# $(PATCHLEVEL) eg, 6 904# $(SUBLEVEL) eg, 18 905# $(EXTRAVERSION) eg, -rc6 906# $(localver-full) 907# $(localver) 908# localversion* (files without backups, containing '~') 909# $(CONFIG_LOCALVERSION) (from kernel config setting) 910# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 911# ./scripts/setlocalversion (SCM tag, if one exists) 912# $(LOCALVERSION) (from make command line if provided) 913# 914# Note how the final $(localver-auto) string is included *only* if the 915# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 916# moment, only git is supported but other SCMs can edit the script 917# scripts/setlocalversion and add the appropriate checks as needed. 918 919pattern = ".*/localversion[^~]*" 920string = $(shell cat /dev/null \ 921 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 922 923localver = $(subst $(space),, $(string) \ 924 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 925 926# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 927# and if the SCM is know a tag from the SCM is appended. 928# The appended tag is determined by the SCM used. 929# 930# .scmversion is used when generating rpm packages so we do not loose 931# the version information from the SCM when we do the build of the kernel 932# from the copied source 933ifdef CONFIG_LOCALVERSION_AUTO 934 935ifeq ($(wildcard .scmversion),) 936 _localver-auto = $(shell $(CONFIG_SHELL) \ 937 $(srctree)/scripts/setlocalversion $(srctree)) 938else 939 _localver-auto = $(shell cat .scmversion 2> /dev/null) 940endif 941 942 localver-auto = $(LOCALVERSION)$(_localver-auto) 943endif 944 945localver-full = $(localver)$(localver-auto) 946 947# Store (new) KERNELRELASE string in include/config/kernel.release 948kernelrelease = $(KERNELVERSION)$(localver-full) 949include/config/kernel.release: include/config/auto.conf FORCE 950 $(Q)rm -f $@ 951 $(Q)echo $(kernelrelease) > $@ 952 953 954# Things we need to do before we recursively start building the kernel 955# or the modules are listed in "prepare". 956# A multi level approach is used. prepareN is processed before prepareN-1. 957# archprepare is used in arch Makefiles and when processed asm symlink, 958# version.h and scripts_basic is processed / created. 959 960# Listed in dependency order 961PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 962 963# prepare3 is used to check if we are building in a separate output directory, 964# and if so do: 965# 1) Check that make has not been executed in the kernel src $(srctree) 966prepare3: include/config/kernel.release 967ifneq ($(KBUILD_SRC),) 968 @$(kecho) ' Using $(srctree) as source for kernel' 969 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 970 echo " $(srctree) is not clean, please run 'make mrproper'";\ 971 echo " in the '$(srctree)' directory.";\ 972 /bin/false; \ 973 fi; 974endif 975 976# prepare2 creates a makefile if using a separate output directory 977prepare2: prepare3 outputmakefile 978 979prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \ 980 include/config/auto.conf 981 $(cmd_crmodverdir) 982 983archprepare: prepare1 scripts_basic 984 985prepare0: archprepare FORCE 986 $(Q)$(MAKE) $(build)=. 987 $(Q)$(MAKE) $(build)=. missing-syscalls 988 989# All the preparing.. 990prepare: prepare0 991 992# Generate some files 993# --------------------------------------------------------------------------- 994 995# KERNELRELEASE can change from a few different places, meaning version.h 996# needs to be updated, so this check is forced on all builds 997 998uts_len := 64 999define filechk_utsrelease.h 1000 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1001 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1002 exit 1; \ 1003 fi; \ 1004 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1005endef 1006 1007define filechk_version.h 1008 (echo \#define LINUX_VERSION_CODE $(shell \ 1009 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1010 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1011endef 1012 1013include/linux/version.h: $(srctree)/Makefile FORCE 1014 $(call filechk,version.h) 1015 1016include/generated/utsrelease.h: include/config/kernel.release FORCE 1017 $(call filechk,utsrelease.h) 1018 1019PHONY += headerdep 1020headerdep: 1021 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 1022 1023# --------------------------------------------------------------------------- 1024 1025PHONY += depend dep 1026depend dep: 1027 @echo '*** Warning: make $@ is unnecessary now.' 1028 1029# --------------------------------------------------------------------------- 1030# Firmware install 1031INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1032export INSTALL_FW_PATH 1033 1034PHONY += firmware_install 1035firmware_install: FORCE 1036 @mkdir -p $(objtree)/firmware 1037 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1038 1039# --------------------------------------------------------------------------- 1040# Kernel headers 1041 1042#Default location for installed headers 1043export INSTALL_HDR_PATH = $(objtree)/usr 1044 1045hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1046 1047# If we do an all arch process set dst to asm-$(hdr-arch) 1048hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1049 1050PHONY += __headers 1051__headers: include/linux/version.h scripts_basic FORCE 1052 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1053 1054PHONY += headers_install_all 1055headers_install_all: 1056 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1057 1058PHONY += headers_install 1059headers_install: __headers 1060 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \ 1061 $(error Headers not exportable for the $(SRCARCH) architecture)) 1062 $(Q)$(MAKE) $(hdr-inst)=include 1063 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) 1064 1065PHONY += headers_check_all 1066headers_check_all: headers_install_all 1067 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1068 1069PHONY += headers_check 1070headers_check: headers_install 1071 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1072 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1 1073 1074# --------------------------------------------------------------------------- 1075# Modules 1076 1077ifdef CONFIG_MODULES 1078 1079# By default, build modules as well 1080 1081all: modules 1082 1083# Build modules 1084# 1085# A module can be listed more than once in obj-m resulting in 1086# duplicate lines in modules.order files. Those are removed 1087# using awk while concatenating to the final file. 1088 1089PHONY += modules 1090modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1091 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1092 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.builtin) > $(objtree)/modules.builtin 1093 @$(kecho) ' Building modules, stage 2.'; 1094 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1095 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1096 1097 1098# Target to prepare building external modules 1099PHONY += modules_prepare 1100modules_prepare: prepare scripts 1101 1102# Target to install modules 1103PHONY += modules_install 1104modules_install: _modinst_ _modinst_post 1105 1106PHONY += _modinst_ 1107_modinst_: 1108 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1109 echo "Warning: you may need to install module-init-tools"; \ 1110 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1111 sleep 1; \ 1112 fi 1113 @rm -rf $(MODLIB)/kernel 1114 @rm -f $(MODLIB)/source 1115 @mkdir -p $(MODLIB)/kernel 1116 @ln -s $(srctree) $(MODLIB)/source 1117 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1118 rm -f $(MODLIB)/build ; \ 1119 ln -s $(objtree) $(MODLIB)/build ; \ 1120 fi 1121 @cp -f $(objtree)/modules.order $(MODLIB)/ 1122 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1123 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1124 1125# This depmod is only for convenience to give the initial 1126# boot a modules.dep even before / is mounted read-write. However the 1127# boot script depmod is the master version. 1128PHONY += _modinst_post 1129_modinst_post: _modinst_ 1130 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1131 $(call cmd,depmod) 1132 1133else # CONFIG_MODULES 1134 1135# Modules not configured 1136# --------------------------------------------------------------------------- 1137 1138modules modules_install: FORCE 1139 @echo 1140 @echo "The present kernel configuration has modules disabled." 1141 @echo "Type 'make config' and enable loadable module support." 1142 @echo "Then build a kernel with module support enabled." 1143 @echo 1144 @exit 1 1145 1146endif # CONFIG_MODULES 1147 1148### 1149# Cleaning is done on three levels. 1150# make clean Delete most generated files 1151# Leave enough to build external modules 1152# make mrproper Delete the current configuration, and all generated files 1153# make distclean Remove editor backup files, patch leftover files and the like 1154 1155# Directories & files removed with 'make clean' 1156CLEAN_DIRS += $(MODVERDIR) 1157CLEAN_FILES += vmlinux System.map \ 1158 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1159 1160# Directories & files removed with 'make mrproper' 1161MRPROPER_DIRS += include/config usr/include include/generated 1162MRPROPER_FILES += .config .config.old .version .old_version \ 1163 include/linux/version.h \ 1164 Module.symvers tags TAGS cscope* 1165 1166# clean - Delete most, but leave enough to build external modules 1167# 1168clean: rm-dirs := $(CLEAN_DIRS) 1169clean: rm-files := $(CLEAN_FILES) 1170clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1171 1172PHONY += $(clean-dirs) clean archclean 1173$(clean-dirs): 1174 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1175 1176clean: archclean $(clean-dirs) 1177 $(call cmd,rmdirs) 1178 $(call cmd,rmfiles) 1179 @find . $(RCS_FIND_IGNORE) \ 1180 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1181 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1182 -o -name '*.symtypes' -o -name 'modules.order' \ 1183 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1184 -o -name '*.gcno' \) -type f -print | xargs rm -f 1185 1186# mrproper - Delete all generated files, including .config 1187# 1188mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1189mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1190mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1191 1192PHONY += $(mrproper-dirs) mrproper archmrproper 1193$(mrproper-dirs): 1194 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1195 1196mrproper: clean archmrproper $(mrproper-dirs) 1197 $(call cmd,rmdirs) 1198 $(call cmd,rmfiles) 1199 1200# distclean 1201# 1202PHONY += distclean 1203 1204distclean: mrproper 1205 @find $(srctree) $(RCS_FIND_IGNORE) \ 1206 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1207 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1208 -o -name '.*.rej' -o -size 0 \ 1209 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1210 -type f -print | xargs rm -f 1211 1212 1213# Packaging of the kernel to various formats 1214# --------------------------------------------------------------------------- 1215# rpm target kept for backward compatibility 1216package-dir := $(srctree)/scripts/package 1217 1218%pkg: include/config/kernel.release FORCE 1219 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1220rpm: include/config/kernel.release FORCE 1221 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1222 1223 1224# Brief documentation of the typical targets used 1225# --------------------------------------------------------------------------- 1226 1227boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1228boards := $(notdir $(boards)) 1229board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1230board-dirs := $(sort $(notdir $(board-dirs:/=))) 1231 1232help: 1233 @echo 'Cleaning targets:' 1234 @echo ' clean - Remove most generated files but keep the config and' 1235 @echo ' enough build support to build external modules' 1236 @echo ' mrproper - Remove all generated files + config + various backup files' 1237 @echo ' distclean - mrproper + remove editor backup and patch files' 1238 @echo '' 1239 @echo 'Configuration targets:' 1240 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1241 @echo '' 1242 @echo 'Other generic targets:' 1243 @echo ' all - Build all targets marked with [*]' 1244 @echo '* vmlinux - Build the bare kernel' 1245 @echo '* modules - Build all modules' 1246 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1247 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1248 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1249 @echo ' dir/ - Build all files in dir and below' 1250 @echo ' dir/file.[ois] - Build specified target only' 1251 @echo ' dir/file.ko - Build module including final link' 1252 @echo ' modules_prepare - Set up for building external modules' 1253 @echo ' tags/TAGS - Generate tags file for editors' 1254 @echo ' cscope - Generate cscope index' 1255 @echo ' kernelrelease - Output the release version string' 1256 @echo ' kernelversion - Output the version stored in Makefile' 1257 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1258 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1259 echo '' 1260 @echo 'Static analysers' 1261 @echo ' checkstack - Generate a list of stack hogs' 1262 @echo ' namespacecheck - Name space analysis on compiled kernel' 1263 @echo ' versioncheck - Sanity check on version.h usage' 1264 @echo ' includecheck - Check for duplicate included header files' 1265 @echo ' export_report - List the usages of all exported symbols' 1266 @echo ' headers_check - Sanity check on exported headers' 1267 @echo ' headerdep - Detect inclusion cycles in headers'; \ 1268 echo '' 1269 @echo 'Kernel packaging:' 1270 @$(MAKE) $(build)=$(package-dir) help 1271 @echo '' 1272 @echo 'Documentation targets:' 1273 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1274 @echo '' 1275 @echo 'Architecture specific targets ($(SRCARCH)):' 1276 @$(if $(archhelp),$(archhelp),\ 1277 echo ' No architecture specific help defined for $(SRCARCH)') 1278 @echo '' 1279 @$(if $(boards), \ 1280 $(foreach b, $(boards), \ 1281 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1282 echo '') 1283 @$(if $(board-dirs), \ 1284 $(foreach b, $(board-dirs), \ 1285 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1286 printf " %-16s - Show all of the above\\n" help-boards; \ 1287 echo '') 1288 1289 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1290 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1291 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1292 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1293 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1294 @echo '' 1295 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1296 @echo 'For further info see the ./README file' 1297 1298 1299help-board-dirs := $(addprefix help-,$(board-dirs)) 1300 1301help-boards: $(help-board-dirs) 1302 1303boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1304 1305$(help-board-dirs): help-%: 1306 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1307 @$(if $(boards-per-dir), \ 1308 $(foreach b, $(boards-per-dir), \ 1309 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1310 echo '') 1311 1312 1313# Documentation targets 1314# --------------------------------------------------------------------------- 1315%docs: scripts_basic FORCE 1316 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1317 1318else # KBUILD_EXTMOD 1319 1320### 1321# External module support. 1322# When building external modules the kernel used as basis is considered 1323# read-only, and no consistency checks are made and the make 1324# system is not used on the basis kernel. If updates are required 1325# in the basis kernel ordinary make commands (without M=...) must 1326# be used. 1327# 1328# The following are the only valid targets when building external 1329# modules. 1330# make M=dir clean Delete all automatically generated files 1331# make M=dir modules Make all modules in specified dir 1332# make M=dir Same as 'make M=dir modules' 1333# make M=dir modules_install 1334# Install the modules built in the module directory 1335# Assumes install directory is already created 1336 1337# We are always building modules 1338KBUILD_MODULES := 1 1339PHONY += crmodverdir 1340crmodverdir: 1341 $(cmd_crmodverdir) 1342 1343PHONY += $(objtree)/Module.symvers 1344$(objtree)/Module.symvers: 1345 @test -e $(objtree)/Module.symvers || ( \ 1346 echo; \ 1347 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1348 echo " is missing; modules will have no dependencies and modversions."; \ 1349 echo ) 1350 1351module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1352PHONY += $(module-dirs) modules 1353$(module-dirs): crmodverdir $(objtree)/Module.symvers 1354 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1355 1356modules: $(module-dirs) 1357 @$(kecho) ' Building modules, stage 2.'; 1358 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1359 1360PHONY += modules_install 1361modules_install: _emodinst_ _emodinst_post 1362 1363install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1364PHONY += _emodinst_ 1365_emodinst_: 1366 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1367 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1368 1369PHONY += _emodinst_post 1370_emodinst_post: _emodinst_ 1371 $(call cmd,depmod) 1372 1373clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1374 1375PHONY += $(clean-dirs) clean 1376$(clean-dirs): 1377 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1378 1379clean: rm-dirs := $(MODVERDIR) 1380clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ 1381 $(KBUILD_EXTMOD)/modules.order \ 1382 $(KBUILD_EXTMOD)/modules.builtin 1383clean: $(clean-dirs) 1384 $(call cmd,rmdirs) 1385 $(call cmd,rmfiles) 1386 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1387 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1388 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1389 -o -name '*.gcno' \) -type f -print | xargs rm -f 1390 1391help: 1392 @echo ' Building external modules.' 1393 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1394 @echo '' 1395 @echo ' modules - default target, build the module(s)' 1396 @echo ' modules_install - install the module' 1397 @echo ' clean - remove generated files in module directory only' 1398 @echo '' 1399 1400# Dummies... 1401PHONY += prepare scripts 1402prepare: ; 1403scripts: ; 1404endif # KBUILD_EXTMOD 1405 1406# Generate tags for editors 1407# --------------------------------------------------------------------------- 1408quiet_cmd_tags = GEN $@ 1409 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1410 1411tags TAGS cscope: FORCE 1412 $(call cmd,tags) 1413 1414# Scripts to check various things for consistency 1415# --------------------------------------------------------------------------- 1416 1417includecheck: 1418 find * $(RCS_FIND_IGNORE) \ 1419 -name '*.[hcS]' -type f -print | sort \ 1420 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1421 1422versioncheck: 1423 find * $(RCS_FIND_IGNORE) \ 1424 -name '*.[hcS]' -type f -print | sort \ 1425 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1426 1427namespacecheck: 1428 $(PERL) $(srctree)/scripts/namespace.pl 1429 1430export_report: 1431 $(PERL) $(srctree)/scripts/export_report.pl 1432 1433endif #ifeq ($(config-targets),1) 1434endif #ifeq ($(mixed-targets),1) 1435 1436PHONY += checkstack kernelrelease kernelversion 1437 1438# UML needs a little special treatment here. It wants to use the host 1439# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1440# else wants $(ARCH), including people doing cross-builds, which means 1441# that $(SUBARCH) doesn't work here. 1442ifeq ($(ARCH), um) 1443CHECKSTACK_ARCH := $(SUBARCH) 1444else 1445CHECKSTACK_ARCH := $(ARCH) 1446endif 1447checkstack: 1448 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1449 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1450 1451kernelrelease: 1452 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1453 $(error kernelrelease not valid - run 'make prepare' to update it)) 1454kernelversion: 1455 @echo $(KERNELVERSION) 1456 1457# Single targets 1458# --------------------------------------------------------------------------- 1459# Single targets are compatible with: 1460# - build with mixed source and output 1461# - build with separate output dir 'make O=...' 1462# - external modules 1463# 1464# target-dir => where to store outputfile 1465# build-dir => directory in kernel source tree to use 1466 1467ifeq ($(KBUILD_EXTMOD),) 1468 build-dir = $(patsubst %/,%,$(dir $@)) 1469 target-dir = $(dir $@) 1470else 1471 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1472 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1473 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1474endif 1475 1476%.s: %.c prepare scripts FORCE 1477 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1478%.i: %.c prepare scripts FORCE 1479 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1480%.o: %.c prepare scripts FORCE 1481 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1482%.lst: %.c prepare scripts FORCE 1483 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1484%.s: %.S prepare scripts FORCE 1485 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1486%.o: %.S prepare scripts FORCE 1487 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1488%.symtypes: %.c prepare scripts FORCE 1489 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1490 1491# Modules 1492/: prepare scripts FORCE 1493 $(cmd_crmodverdir) 1494 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1495 $(build)=$(build-dir) 1496%/: prepare scripts FORCE 1497 $(cmd_crmodverdir) 1498 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1499 $(build)=$(build-dir) 1500%.ko: prepare scripts FORCE 1501 $(cmd_crmodverdir) 1502 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1503 $(build)=$(build-dir) $(@:.ko=.o) 1504 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1505 1506# FIXME Should go into a make.lib or something 1507# =========================================================================== 1508 1509quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1510 cmd_rmdirs = rm -rf $(rm-dirs) 1511 1512quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1513 cmd_rmfiles = rm -f $(rm-files) 1514 1515# Run depmod only if we have System.map and depmod is executable 1516quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1517 cmd_depmod = \ 1518 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1519 $(DEPMOD) -ae -F System.map \ 1520 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1521 $(KERNELRELEASE); \ 1522 fi 1523 1524# Create temporary dir for module support files 1525# clean it up only when building all modules 1526cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1527 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1528 1529a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1530 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1531 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1532 1533quiet_cmd_as_o_S = AS $@ 1534cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1535 1536# read all saved command lines 1537 1538targets := $(wildcard $(sort $(targets))) 1539cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1540 1541ifneq ($(cmd_files),) 1542 $(cmd_files): ; # Do not try to update included dependency files 1543 include $(cmd_files) 1544endif 1545 1546# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1547# Usage: 1548# $(Q)$(MAKE) $(clean)=dir 1549clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1550 1551endif # skip-makefile 1552 1553PHONY += FORCE 1554FORCE: 1555 1556# Declare the contents of the .PHONY variable as phony. We keep that 1557# information in a variable so we can use it in if_changed and friends. 1558.PHONY: $(PHONY) 1559