1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 32 4EXTRAVERSION = .59 5NAME = Man-Eating Seals of Antiquity 6 7# *DOCUMENTATION* 8# To see a list of typical targets execute "make help" 9# More info can be located in ./README 10# Comments in this file are targeted only to the developer, do not 11# expect to learn how to build the kernel reading this file. 12 13# Do not: 14# o use make's built-in rules and variables 15# (this increases performance and avoids hard-to-debug behaviour); 16# o print "Entering directory ..."; 17MAKEFLAGS += -rR --no-print-directory 18 19# We are using a recursive build, so we need to do a little thinking 20# to get the ordering right. 21# 22# Most importantly: sub-Makefiles should only ever modify files in 23# their own directory. If in some directory we have a dependency on 24# a file in another dir (which doesn't happen often, but it's often 25# unavoidable when linking the built-in.o targets which finally 26# turn into vmlinux), we will call a sub make in that other dir, and 27# after that we are sure that everything which is in that other dir 28# is now up to date. 29# 30# The only cases where we need to modify files which have global 31# effects are thus separated out and done before the recursive 32# descending is started. They are now explicitly listed as the 33# prepare rule. 34 35# To put more focus on warnings, be less verbose as default 36# Use 'make V=1' to see the full commands 37 38ifeq ("$(origin V)", "command line") 39 KBUILD_VERBOSE = $(V) 40endif 41ifndef KBUILD_VERBOSE 42 KBUILD_VERBOSE = 0 43endif 44 45# Call a source code checker (by default, "sparse") as part of the 46# C compilation. 47# 48# Use 'make C=1' to enable checking of only re-compiled files. 49# Use 'make C=2' to enable checking of *all* source files, regardless 50# of whether they are re-compiled or not. 51# 52# See the file "Documentation/sparse.txt" for more details, including 53# where to get the "sparse" utility. 54 55ifeq ("$(origin C)", "command line") 56 KBUILD_CHECKSRC = $(C) 57endif 58ifndef KBUILD_CHECKSRC 59 KBUILD_CHECKSRC = 0 60endif 61 62# Use make M=dir to specify directory of external module to build 63# Old syntax make ... SUBDIRS=$PWD is still supported 64# Setting the environment variable KBUILD_EXTMOD take precedence 65ifdef SUBDIRS 66 KBUILD_EXTMOD ?= $(SUBDIRS) 67endif 68 69ifeq ("$(origin M)", "command line") 70 KBUILD_EXTMOD := $(M) 71endif 72 73# kbuild supports saving output files in a separate directory. 74# To locate output files in a separate directory two syntaxes are supported. 75# In both cases the working directory must be the root of the kernel src. 76# 1) O= 77# Use "make O=dir/to/store/output/files/" 78# 79# 2) Set KBUILD_OUTPUT 80# Set the environment variable KBUILD_OUTPUT to point to the directory 81# where the output files shall be placed. 82# export KBUILD_OUTPUT=dir/to/store/output/files/ 83# make 84# 85# The O= assignment takes precedence over the KBUILD_OUTPUT environment 86# variable. 87 88 89# KBUILD_SRC is set on invocation of make in OBJ directory 90# KBUILD_SRC is not intended to be used by the regular user (for now) 91ifeq ($(KBUILD_SRC),) 92 93# OK, Make called in directory where kernel src resides 94# Do we want to locate output files in a separate directory? 95ifeq ("$(origin O)", "command line") 96 KBUILD_OUTPUT := $(O) 97endif 98 99# That's our default target when none is given on the command line 100PHONY := _all 101_all: 102 103# Cancel implicit rules on top Makefile 104$(CURDIR)/Makefile Makefile: ; 105 106ifneq ($(KBUILD_OUTPUT),) 107# Invoke a second make in the output directory, passing relevant variables 108# check that the output directory actually exists 109saved-output := $(KBUILD_OUTPUT) 110KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 111$(if $(KBUILD_OUTPUT),, \ 112 $(error output directory "$(saved-output)" does not exist)) 113 114PHONY += $(MAKECMDGOALS) sub-make 115 116$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 117 $(Q)@: 118 119sub-make: FORCE 120 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 121 KBUILD_SRC=$(CURDIR) \ 122 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 123 $(filter-out _all sub-make,$(MAKECMDGOALS)) 124 125# Leave processing to above invocation of make 126skip-makefile := 1 127endif # ifneq ($(KBUILD_OUTPUT),) 128endif # ifeq ($(KBUILD_SRC),) 129 130# We process the rest of the Makefile if this is the final invocation of make 131ifeq ($(skip-makefile),) 132 133# If building an external module we do not care about the all: rule 134# but instead _all depend on modules 135PHONY += all 136ifeq ($(KBUILD_EXTMOD),) 137_all: all 138else 139_all: modules 140endif 141 142srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 143objtree := $(CURDIR) 144src := $(srctree) 145obj := $(objtree) 146 147VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 148 149export srctree objtree VPATH 150 151 152# SUBARCH tells the usermode build what the underlying arch is. That is set 153# first, and if a usermode build is happening, the "ARCH=um" on the command 154# line overrides the setting of ARCH below. If a native build is happening, 155# then ARCH is assigned, getting whatever value it gets normally, and 156# SUBARCH is subsequently ignored. 157 158SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 159 -e s/arm.*/arm/ -e s/sa110/arm/ \ 160 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 161 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 162 -e s/sh[234].*/sh/ ) 163 164# Cross compiling and selecting different set of gcc/bin-utils 165# --------------------------------------------------------------------------- 166# 167# When performing cross compilation for other architectures ARCH shall be set 168# to the target architecture. (See arch/* for the possibilities). 169# ARCH can be set during invocation of make: 170# make ARCH=ia64 171# Another way is to have ARCH set in the environment. 172# The default ARCH is the host where make is executed. 173 174# CROSS_COMPILE specify the prefix used for all executables used 175# during compilation. Only gcc and related bin-utils executables 176# are prefixed with $(CROSS_COMPILE). 177# CROSS_COMPILE can be set on the command line 178# make CROSS_COMPILE=ia64-linux- 179# Alternatively CROSS_COMPILE can be set in the environment. 180# Default value for CROSS_COMPILE is not to prefix executables 181# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 182export KBUILD_BUILDHOST := $(SUBARCH) 183ARCH ?= $(SUBARCH) 184CROSS_COMPILE ?= 185 186# Architecture as present in compile.h 187UTS_MACHINE := $(ARCH) 188SRCARCH := $(ARCH) 189 190# Additional ARCH settings for x86 191ifeq ($(ARCH),i386) 192 SRCARCH := x86 193endif 194ifeq ($(ARCH),x86_64) 195 SRCARCH := x86 196endif 197 198# Additional ARCH settings for sparc 199ifeq ($(ARCH),sparc64) 200 SRCARCH := sparc 201endif 202 203# Additional ARCH settings for sh 204ifeq ($(ARCH),sh64) 205 SRCARCH := sh 206endif 207 208# Where to locate arch specific headers 209hdr-arch := $(SRCARCH) 210 211ifeq ($(ARCH),m68knommu) 212 hdr-arch := m68k 213endif 214 215KCONFIG_CONFIG ?= .config 216 217# SHELL used by kbuild 218CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 219 else if [ -x /bin/bash ]; then echo /bin/bash; \ 220 else echo sh; fi ; fi) 221 222HOSTCC = gcc 223HOSTCXX = g++ 224HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 225HOSTCXXFLAGS = -O2 226 227# Decide whether to build built-in, modular, or both. 228# Normally, just do built-in. 229 230KBUILD_MODULES := 231KBUILD_BUILTIN := 1 232 233# If we have only "make modules", don't compile built-in objects. 234# When we're building modules with modversions, we need to consider 235# the built-in objects during the descend as well, in order to 236# make sure the checksums are up to date before we record them. 237 238ifeq ($(MAKECMDGOALS),modules) 239 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 240endif 241 242# If we have "make <whatever> modules", compile modules 243# in addition to whatever we do anyway. 244# Just "make" or "make all" shall build modules as well 245 246ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 247 KBUILD_MODULES := 1 248endif 249 250ifeq ($(MAKECMDGOALS),) 251 KBUILD_MODULES := 1 252endif 253 254export KBUILD_MODULES KBUILD_BUILTIN 255export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 256 257# Beautify output 258# --------------------------------------------------------------------------- 259# 260# Normally, we echo the whole command before executing it. By making 261# that echo $($(quiet)$(cmd)), we now have the possibility to set 262# $(quiet) to choose other forms of output instead, e.g. 263# 264# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 265# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 266# 267# If $(quiet) is empty, the whole command will be printed. 268# If it is set to "quiet_", only the short version will be printed. 269# If it is set to "silent_", nothing will be printed at all, since 270# the variable $(silent_cmd_cc_o_c) doesn't exist. 271# 272# A simple variant is to prefix commands with $(Q) - that's useful 273# for commands that shall be hidden in non-verbose mode. 274# 275# $(Q)ln $@ :< 276# 277# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 278# If KBUILD_VERBOSE equals 1 then the above command is displayed. 279 280ifeq ($(KBUILD_VERBOSE),1) 281 quiet = 282 Q = 283else 284 quiet=quiet_ 285 Q = @ 286endif 287 288# If the user is running make -s (silent mode), suppress echoing of 289# commands 290 291ifneq ($(findstring s,$(MAKEFLAGS)),) 292 quiet=silent_ 293endif 294 295export quiet Q KBUILD_VERBOSE 296 297 298# Look for make include files relative to root of kernel src 299MAKEFLAGS += --include-dir=$(srctree) 300 301# We need some generic definitions (do not try to remake the file). 302$(srctree)/scripts/Kbuild.include: ; 303include $(srctree)/scripts/Kbuild.include 304 305# Make variables (CC, etc...) 306 307AS = $(CROSS_COMPILE)as 308LD = $(CROSS_COMPILE)ld 309CC = $(CROSS_COMPILE)gcc 310CPP = $(CC) -E 311AR = $(CROSS_COMPILE)ar 312NM = $(CROSS_COMPILE)nm 313STRIP = $(CROSS_COMPILE)strip 314OBJCOPY = $(CROSS_COMPILE)objcopy 315OBJDUMP = $(CROSS_COMPILE)objdump 316AWK = awk 317GENKSYMS = scripts/genksyms/genksyms 318INSTALLKERNEL := installkernel 319DEPMOD = /sbin/depmod 320KALLSYMS = scripts/kallsyms 321PERL = perl 322CHECK = sparse 323 324CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 325 -Wbitwise -Wno-return-void $(CF) 326MODFLAGS = -DMODULE 327CFLAGS_MODULE = $(MODFLAGS) 328AFLAGS_MODULE = $(MODFLAGS) 329LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds 330CFLAGS_KERNEL = 331AFLAGS_KERNEL = 332CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 333 334 335# Use LINUXINCLUDE when you must reference the include/ directory. 336# Needed to be compatible with the O= option 337LINUXINCLUDE := -Iinclude \ 338 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 339 -I$(srctree)/arch/$(hdr-arch)/include \ 340 -include include/linux/autoconf.h 341 342KBUILD_CPPFLAGS := -D__KERNEL__ 343 344KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 345 -fno-strict-aliasing -fno-common \ 346 -Werror-implicit-function-declaration \ 347 -Wno-format-security \ 348 -fno-delete-null-pointer-checks 349KBUILD_AFLAGS := -D__ASSEMBLY__ 350 351# Read KERNELRELEASE from include/config/kernel.release (if it exists) 352KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 353KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 354 355export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 356export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 357export CPP AR NM STRIP OBJCOPY OBJDUMP 358export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 359export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 360 361export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 362export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 363export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 364 365# When compiling out-of-tree modules, put MODVERDIR in the module 366# tree rather than in the kernel tree. The kernel tree might 367# even be read-only. 368export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 369 370# Files to ignore in find ... statements 371 372RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 373export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 374 375# =========================================================================== 376# Rules shared between *config targets and build targets 377 378# Basic helpers built in scripts/ 379PHONY += scripts_basic 380scripts_basic: 381 $(Q)$(MAKE) $(build)=scripts/basic 382 383# To avoid any implicit rule to kick in, define an empty command. 384scripts/basic/%: scripts_basic ; 385 386PHONY += outputmakefile 387# outputmakefile generates a Makefile in the output directory, if using a 388# separate output directory. This allows convenient use of make in the 389# output directory. 390outputmakefile: 391ifneq ($(KBUILD_SRC),) 392 $(Q)ln -fsn $(srctree) source 393 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 394 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 395endif 396 397# To make sure we do not include .config for any of the *config targets 398# catch them early, and hand them over to scripts/kconfig/Makefile 399# It is allowed to specify more targets when calling make, including 400# mixing *config targets and build targets. 401# For example 'make oldconfig all'. 402# Detect when mixed targets is specified, and make a second invocation 403# of make so .config is not included in this case either (for *config). 404 405no-dot-config-targets := clean mrproper distclean \ 406 cscope TAGS tags help %docs check% \ 407 include/linux/version.h headers_% \ 408 kernelrelease kernelversion 409 410config-targets := 0 411mixed-targets := 0 412dot-config := 1 413 414ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 415 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 416 dot-config := 0 417 endif 418endif 419 420ifeq ($(KBUILD_EXTMOD),) 421 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 422 config-targets := 1 423 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 424 mixed-targets := 1 425 endif 426 endif 427endif 428 429ifeq ($(mixed-targets),1) 430# =========================================================================== 431# We're called with mixed targets (*config and build targets). 432# Handle them one by one. 433 434%:: FORCE 435 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 436 437else 438ifeq ($(config-targets),1) 439# =========================================================================== 440# *config targets only - make sure prerequisites are updated, and descend 441# in scripts/kconfig to make the *config target 442 443# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 444# KBUILD_DEFCONFIG may point out an alternative default configuration 445# used for 'make defconfig' 446include $(srctree)/arch/$(SRCARCH)/Makefile 447export KBUILD_DEFCONFIG KBUILD_KCONFIG 448 449config: scripts_basic outputmakefile FORCE 450 $(Q)mkdir -p include/linux include/config 451 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 452 453%config: scripts_basic outputmakefile FORCE 454 $(Q)mkdir -p include/linux include/config 455 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 456 457else 458# =========================================================================== 459# Build targets only - this includes vmlinux, arch specific targets, clean 460# targets and others. In general all targets except *config targets. 461 462ifeq ($(KBUILD_EXTMOD),) 463# Additional helpers built in scripts/ 464# Carefully list dependencies so we do not try to build scripts twice 465# in parallel 466PHONY += scripts 467scripts: scripts_basic include/config/auto.conf 468 $(Q)$(MAKE) $(build)=$(@) 469 470# Objects we will link into vmlinux / subdirs we need to visit 471init-y := init/ 472drivers-y := drivers/ sound/ firmware/ 473net-y := net/ 474libs-y := lib/ 475core-y := usr/ 476endif # KBUILD_EXTMOD 477 478ifeq ($(dot-config),1) 479# Read in config 480-include include/config/auto.conf 481 482ifeq ($(KBUILD_EXTMOD),) 483# Read in dependencies to all Kconfig* files, make sure to run 484# oldconfig if changes are detected. 485-include include/config/auto.conf.cmd 486 487# To avoid any implicit rule to kick in, define an empty command 488$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 489 490# If .config is newer than include/config/auto.conf, someone tinkered 491# with it and forgot to run make oldconfig. 492# if auto.conf.cmd is missing then we are probably in a cleaned tree so 493# we execute the config step to be sure to catch updated Kconfig files 494include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 495 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 496else 497# external modules needs include/linux/autoconf.h and include/config/auto.conf 498# but do not care if they are up-to-date. Use auto.conf to trigger the test 499PHONY += include/config/auto.conf 500 501include/config/auto.conf: 502 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 503 echo; \ 504 echo " ERROR: Kernel configuration is invalid."; \ 505 echo " include/linux/autoconf.h or $@ are missing."; \ 506 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 507 echo; \ 508 /bin/false) 509 510endif # KBUILD_EXTMOD 511 512else 513# Dummy target needed, because used as prerequisite 514include/config/auto.conf: ; 515endif # $(dot-config) 516 517# The all: target is the default when no target is given on the 518# command line. 519# This allow a user to issue only 'make' to build a kernel including modules 520# Defaults vmlinux but it is usually overridden in the arch makefile 521all: vmlinux 522 523ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 524KBUILD_CFLAGS += -Os 525else 526KBUILD_CFLAGS += -O2 527endif 528 529include $(srctree)/arch/$(SRCARCH)/Makefile 530 531ifneq ($(CONFIG_FRAME_WARN),0) 532KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 533endif 534 535# Force gcc to behave correct even for buggy distributions 536ifndef CONFIG_CC_STACKPROTECTOR 537KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 538endif 539 540# This warning generated too much noise in a regular build. 541KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 542 543ifdef CONFIG_FRAME_POINTER 544KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 545else 546KBUILD_CFLAGS += -fomit-frame-pointer 547endif 548 549ifdef CONFIG_DEBUG_INFO 550KBUILD_CFLAGS += -g 551KBUILD_AFLAGS += -gdwarf-2 552endif 553 554ifdef CONFIG_FUNCTION_TRACER 555KBUILD_CFLAGS += -pg 556endif 557 558# We trigger additional mismatches with less inlining 559ifdef CONFIG_DEBUG_SECTION_MISMATCH 560KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 561endif 562 563# arch Makefile may override CC so keep this after arch Makefile is included 564NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 565CHECKFLAGS += $(NOSTDINC_FLAGS) 566 567# warn about C99 declaration after statement 568KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 569 570# disable pointer signed / unsigned warnings in gcc 4.0 571KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 572 573# disable invalid "can't wrap" optimizations for signed / pointers 574KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 575 576# revert to pre-gcc-4.4 behaviour of .eh_frame 577KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 578 579# conserve stack if available 580KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 581 582# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 583# But warn user when we do so 584warn-assign = \ 585$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 586 587ifneq ($(KCPPFLAGS),) 588 $(call warn-assign,CPPFLAGS) 589 KBUILD_CPPFLAGS += $(KCPPFLAGS) 590endif 591ifneq ($(KAFLAGS),) 592 $(call warn-assign,AFLAGS) 593 KBUILD_AFLAGS += $(KAFLAGS) 594endif 595ifneq ($(KCFLAGS),) 596 $(call warn-assign,CFLAGS) 597 KBUILD_CFLAGS += $(KCFLAGS) 598endif 599 600# Use --build-id when available. 601LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 602 $(call cc-ldoption, -Wl$(comma)--build-id,)) 603LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 604LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 605 606ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 607LDFLAGS_vmlinux += $(call ld-option, -X,) 608endif 609 610# Default kernel image to build when no specific target is given. 611# KBUILD_IMAGE may be overruled on the command line or 612# set in the environment 613# Also any assignments in arch/$(ARCH)/Makefile take precedence over 614# this default value 615export KBUILD_IMAGE ?= vmlinux 616 617# 618# INSTALL_PATH specifies where to place the updated kernel and system map 619# images. Default is /boot, but you can set it to other values 620export INSTALL_PATH ?= /boot 621 622# 623# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 624# relocations required by build roots. This is not defined in the 625# makefile but the argument can be passed to make if needed. 626# 627 628MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 629export MODLIB 630 631# 632# INSTALL_MOD_STRIP, if defined, will cause modules to be 633# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 634# the default option --strip-debug will be used. Otherwise, 635# INSTALL_MOD_STRIP will used as the options to the strip command. 636 637ifdef INSTALL_MOD_STRIP 638ifeq ($(INSTALL_MOD_STRIP),1) 639mod_strip_cmd = $(STRIP) --strip-debug 640else 641mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 642endif # INSTALL_MOD_STRIP=1 643else 644mod_strip_cmd = true 645endif # INSTALL_MOD_STRIP 646export mod_strip_cmd 647 648 649ifeq ($(KBUILD_EXTMOD),) 650core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 651 652vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 653 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 654 $(net-y) $(net-m) $(libs-y) $(libs-m))) 655 656vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 657 $(init-n) $(init-) \ 658 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 659 $(net-n) $(net-) $(libs-n) $(libs-)))) 660 661init-y := $(patsubst %/, %/built-in.o, $(init-y)) 662core-y := $(patsubst %/, %/built-in.o, $(core-y)) 663drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 664net-y := $(patsubst %/, %/built-in.o, $(net-y)) 665libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 666libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 667libs-y := $(libs-y1) $(libs-y2) 668 669# Build vmlinux 670# --------------------------------------------------------------------------- 671# vmlinux is built from the objects selected by $(vmlinux-init) and 672# $(vmlinux-main). Most are built-in.o files from top-level directories 673# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 674# Ordering when linking is important, and $(vmlinux-init) must be first. 675# 676# vmlinux 677# ^ 678# | 679# +-< $(vmlinux-init) 680# | +--< init/version.o + more 681# | 682# +--< $(vmlinux-main) 683# | +--< driver/built-in.o mm/built-in.o + more 684# | 685# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 686# 687# vmlinux version (uname -v) cannot be updated during normal 688# descending-into-subdirs phase since we do not yet know if we need to 689# update vmlinux. 690# Therefore this step is delayed until just before final link of vmlinux - 691# except in the kallsyms case where it is done just before adding the 692# symbols to the kernel. 693# 694# System.map is generated to document addresses of all kernel symbols 695 696vmlinux-init := $(head-y) $(init-y) 697vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 698vmlinux-all := $(vmlinux-init) $(vmlinux-main) 699vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 700export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 701 702# Rule to link vmlinux - also used during CONFIG_KALLSYMS 703# May be overridden by arch/$(ARCH)/Makefile 704quiet_cmd_vmlinux__ ?= LD $@ 705 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 706 -T $(vmlinux-lds) $(vmlinux-init) \ 707 --start-group $(vmlinux-main) --end-group \ 708 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 709 710# Generate new vmlinux version 711quiet_cmd_vmlinux_version = GEN .version 712 cmd_vmlinux_version = set -e; \ 713 if [ ! -r .version ]; then \ 714 rm -f .version; \ 715 echo 1 >.version; \ 716 else \ 717 mv .version .old_version; \ 718 expr 0$$(cat .old_version) + 1 >.version; \ 719 fi; \ 720 $(MAKE) $(build)=init 721 722# Generate System.map 723quiet_cmd_sysmap = SYSMAP 724 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 725 726# Link of vmlinux 727# If CONFIG_KALLSYMS is set .version is already updated 728# Generate System.map and verify that the content is consistent 729# Use + in front of the vmlinux_version rule to silent warning with make -j2 730# First command is ':' to allow us to use + in front of the rule 731define rule_vmlinux__ 732 : 733 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 734 735 $(call cmd,vmlinux__) 736 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 737 738 $(Q)$(if $($(quiet)cmd_sysmap), \ 739 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 740 $(cmd_sysmap) $@ System.map; \ 741 if [ $$? -ne 0 ]; then \ 742 rm -f $@; \ 743 /bin/false; \ 744 fi; 745 $(verify_kallsyms) 746endef 747 748 749ifdef CONFIG_KALLSYMS 750# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 751# It's a three stage process: 752# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 753# empty 754# Running kallsyms on that gives us .tmp_kallsyms1.o with 755# the right size - vmlinux version (uname -v) is updated during this step 756# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 757# but due to the added section, some addresses have shifted. 758# From here, we generate a correct .tmp_kallsyms2.o 759# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 760# o Verify that the System.map from vmlinux matches the map from 761# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 762# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 763# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 764# temporary bypass to allow the kernel to be built while the 765# maintainers work out what went wrong with kallsyms. 766 767ifdef CONFIG_KALLSYMS_EXTRA_PASS 768last_kallsyms := 3 769else 770last_kallsyms := 2 771endif 772 773kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 774 775define verify_kallsyms 776 $(Q)$(if $($(quiet)cmd_sysmap), \ 777 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 778 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 779 $(Q)cmp -s System.map .tmp_System.map || \ 780 (echo Inconsistent kallsyms data; \ 781 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 782 rm .tmp_kallsyms* ; /bin/false ) 783endef 784 785# Update vmlinux version before link 786# Use + in front of this rule to silent warning about make -j1 787# First command is ':' to allow us to use + in front of this rule 788cmd_ksym_ld = $(cmd_vmlinux__) 789define rule_ksym_ld 790 : 791 +$(call cmd,vmlinux_version) 792 $(call cmd,vmlinux__) 793 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 794endef 795 796# Generate .S file with all kernel symbols 797quiet_cmd_kallsyms = KSYM $@ 798 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 799 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 800 801.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 802 $(call if_changed_dep,as_o_S) 803 804.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 805 $(call cmd,kallsyms) 806 807# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 808.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 809 $(call if_changed_rule,ksym_ld) 810 811.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 812 $(call if_changed,vmlinux__) 813 814.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 815 $(call if_changed,vmlinux__) 816 817# Needs to visit scripts/ before $(KALLSYMS) can be used. 818$(KALLSYMS): scripts ; 819 820# Generate some data for debugging strange kallsyms problems 821debug_kallsyms: .tmp_map$(last_kallsyms) 822 823.tmp_map%: .tmp_vmlinux% FORCE 824 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 825 826.tmp_map3: .tmp_map2 827 828.tmp_map2: .tmp_map1 829 830endif # ifdef CONFIG_KALLSYMS 831 832# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 833# relevant sections renamed as per the linker script. 834quiet_cmd_vmlinux-modpost = LD $@ 835 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 836 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 837 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 838define rule_vmlinux-modpost 839 : 840 +$(call cmd,vmlinux-modpost) 841 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 842 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 843endef 844 845# vmlinux image - including updated kernel symbols 846vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 847ifdef CONFIG_HEADERS_CHECK 848 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 849endif 850ifdef CONFIG_SAMPLES 851 $(Q)$(MAKE) $(build)=samples 852endif 853ifdef CONFIG_BUILD_DOCSRC 854 $(Q)$(MAKE) $(build)=Documentation 855endif 856 $(call vmlinux-modpost) 857 $(call if_changed_rule,vmlinux__) 858 $(Q)rm -f .old_version 859 860# build vmlinux.o first to catch section mismatch errors early 861ifdef CONFIG_KALLSYMS 862.tmp_vmlinux1: vmlinux.o 863endif 864 865modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 866vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 867 $(call if_changed_rule,vmlinux-modpost) 868 869# The actual objects are generated when descending, 870# make sure no implicit rule kicks in 871$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 872 873# Handle descending into subdirectories listed in $(vmlinux-dirs) 874# Preset locale variables to speed up the build process. Limit locale 875# tweaks to this spot to avoid wrong language settings when running 876# make menuconfig etc. 877# Error messages still appears in the original language 878 879PHONY += $(vmlinux-dirs) 880$(vmlinux-dirs): prepare scripts 881 $(Q)$(MAKE) $(build)=$@ 882 883# Build the kernel release string 884# 885# The KERNELRELEASE value built here is stored in the file 886# include/config/kernel.release, and is used when executing several 887# make targets, such as "make install" or "make modules_install." 888# 889# The eventual kernel release string consists of the following fields, 890# shown in a hierarchical format to show how smaller parts are concatenated 891# to form the larger and final value, with values coming from places like 892# the Makefile, kernel config options, make command line options and/or 893# SCM tag information. 894# 895# $(KERNELVERSION) 896# $(VERSION) eg, 2 897# $(PATCHLEVEL) eg, 6 898# $(SUBLEVEL) eg, 18 899# $(EXTRAVERSION) eg, -rc6 900# $(localver-full) 901# $(localver) 902# localversion* (files without backups, containing '~') 903# $(CONFIG_LOCALVERSION) (from kernel config setting) 904# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 905# ./scripts/setlocalversion (SCM tag, if one exists) 906# $(LOCALVERSION) (from make command line if provided) 907# 908# Note how the final $(localver-auto) string is included *only* if the 909# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 910# moment, only git is supported but other SCMs can edit the script 911# scripts/setlocalversion and add the appropriate checks as needed. 912 913pattern = ".*/localversion[^~]*" 914string = $(shell cat /dev/null \ 915 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 916 917localver = $(subst $(space),, $(string) \ 918 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 919 920# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 921# and if the SCM is know a tag from the SCM is appended. 922# The appended tag is determined by the SCM used. 923# 924# .scmversion is used when generating rpm packages so we do not loose 925# the version information from the SCM when we do the build of the kernel 926# from the copied source 927ifdef CONFIG_LOCALVERSION_AUTO 928 929ifeq ($(wildcard .scmversion),) 930 _localver-auto = $(shell $(CONFIG_SHELL) \ 931 $(srctree)/scripts/setlocalversion $(srctree)) 932else 933 _localver-auto = $(shell cat .scmversion 2> /dev/null) 934endif 935 936 localver-auto = $(LOCALVERSION)$(_localver-auto) 937endif 938 939localver-full = $(localver)$(localver-auto) 940 941# Store (new) KERNELRELASE string in include/config/kernel.release 942kernelrelease = $(KERNELVERSION)$(localver-full) 943include/config/kernel.release: include/config/auto.conf FORCE 944 $(Q)rm -f $@ 945 $(Q)echo $(kernelrelease) > $@ 946 947 948# Things we need to do before we recursively start building the kernel 949# or the modules are listed in "prepare". 950# A multi level approach is used. prepareN is processed before prepareN-1. 951# archprepare is used in arch Makefiles and when processed asm symlink, 952# version.h and scripts_basic is processed / created. 953 954# Listed in dependency order 955PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 956 957# prepare3 is used to check if we are building in a separate output directory, 958# and if so do: 959# 1) Check that make has not been executed in the kernel src $(srctree) 960# 2) Create the include2 directory, used for the second asm symlink 961prepare3: include/config/kernel.release 962ifneq ($(KBUILD_SRC),) 963 @$(kecho) ' Using $(srctree) as source for kernel' 964 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 965 echo " $(srctree) is not clean, please run 'make mrproper'";\ 966 echo " in the '$(srctree)' directory.";\ 967 /bin/false; \ 968 fi; 969 $(Q)if [ ! -d include2 ]; then \ 970 mkdir -p include2; \ 971 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 972 fi 973endif 974 975# prepare2 creates a makefile if using a separate output directory 976prepare2: prepare3 outputmakefile 977 978prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 979 include/asm include/config/auto.conf 980 $(cmd_crmodverdir) 981 982archprepare: prepare1 scripts_basic 983 984prepare0: archprepare FORCE 985 $(Q)$(MAKE) $(build)=. 986 $(Q)$(MAKE) $(build)=. missing-syscalls 987 988# All the preparing.. 989prepare: prepare0 990 991# The asm symlink changes when $(ARCH) changes. 992# Detect this and ask user to run make mrproper 993# If asm is a stale symlink (point to dir that does not exist) remove it 994define check-symlink 995 set -e; \ 996 if [ -L include/asm ]; then \ 997 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 998 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 999 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 1000 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
1001 exit 1; \ 1002 fi; \ 1003 test -e $$asmlink || rm include/asm; \ 1004 elif [ -d include/asm ]; then \ 1005 echo "ERROR: $@ is a directory but a symlink was expected";\ 1006 exit 1; \ 1007 fi 1008endef 1009 1010# We create the target directory of the symlink if it does 1011# not exist so the test in check-symlink works and we have a 1012# directory for generated filesas used by some architectures. 1013define create-symlink 1014 if [ ! -L include/asm ]; then \ 1015 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 1016 if [ ! -d include/asm-$(SRCARCH) ]; then \ 1017 mkdir -p include/asm-$(SRCARCH); \ 1018 fi; \ 1019 ln -fsn asm-$(SRCARCH) $@; \ 1020 fi 1021endef 1022 1023include/asm: FORCE 1024 $(Q)$(check-symlink) 1025 $(Q)$(create-symlink) 1026 1027# Generate some files 1028# --------------------------------------------------------------------------- 1029 1030# KERNELRELEASE can change from a few different places, meaning version.h 1031# needs to be updated, so this check is forced on all builds 1032 1033uts_len := 64 1034define filechk_utsrelease.h 1035 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1036 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1037 exit 1; \ 1038 fi; \ 1039 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1040endef 1041 1042define filechk_version.h 1043 (echo \#define LINUX_VERSION_CODE $(shell \ 1044 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1045 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1046endef 1047 1048include/linux/version.h: $(srctree)/Makefile FORCE 1049 $(call filechk,version.h) 1050 1051include/linux/utsrelease.h: include/config/kernel.release FORCE 1052 $(call filechk,utsrelease.h) 1053 1054PHONY += headerdep 1055headerdep: 1056 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 1057 1058# --------------------------------------------------------------------------- 1059 1060PHONY += depend dep 1061depend dep: 1062 @echo '*** Warning: make $@ is unnecessary now.' 1063 1064# --------------------------------------------------------------------------- 1065# Firmware install 1066INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1067export INSTALL_FW_PATH 1068 1069PHONY += firmware_install 1070firmware_install: FORCE 1071 @mkdir -p $(objtree)/firmware 1072 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1073 1074# --------------------------------------------------------------------------- 1075# Kernel headers 1076 1077#Default location for installed headers 1078export INSTALL_HDR_PATH = $(objtree)/usr 1079 1080hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1081# Find out where the Kbuild file is located to support 1082# arch/$(ARCH)/include/asm 1083hdr-dir = $(strip \ 1084 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1085 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1086 1087# If we do an all arch process set dst to asm-$(hdr-arch) 1088hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1089 1090PHONY += __headers 1091__headers: include/linux/version.h scripts_basic FORCE 1092 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1093 1094PHONY += headers_install_all 1095headers_install_all: 1096 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1097 1098PHONY += headers_install 1099headers_install: __headers 1100 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1101 $(error Headers not exportable for the $(SRCARCH) architecture)) 1102 $(Q)$(MAKE) $(hdr-inst)=include 1103 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1104 1105PHONY += headers_check_all 1106headers_check_all: headers_install_all 1107 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1108 1109PHONY += headers_check 1110headers_check: headers_install 1111 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1112 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1113 1114# --------------------------------------------------------------------------- 1115# Modules 1116 1117ifdef CONFIG_MODULES 1118 1119# By default, build modules as well 1120 1121all: modules 1122 1123# Build modules 1124# 1125# A module can be listed more than once in obj-m resulting in 1126# duplicate lines in modules.order files. Those are removed 1127# using awk while concatenating to the final file. 1128 1129PHONY += modules 1130modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1131 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1132 @$(kecho) ' Building modules, stage 2.'; 1133 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1134 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1135 1136 1137# Target to prepare building external modules 1138PHONY += modules_prepare 1139modules_prepare: prepare scripts 1140 1141# Target to install modules 1142PHONY += modules_install 1143modules_install: _modinst_ _modinst_post 1144 1145PHONY += _modinst_ 1146_modinst_: 1147 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1148 echo "Warning: you may need to install module-init-tools"; \ 1149 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1150 sleep 1; \ 1151 fi 1152 @rm -rf $(MODLIB)/kernel 1153 @rm -f $(MODLIB)/source 1154 @mkdir -p $(MODLIB)/kernel 1155 @ln -s $(srctree) $(MODLIB)/source 1156 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1157 rm -f $(MODLIB)/build ; \ 1158 ln -s $(objtree) $(MODLIB)/build ; \ 1159 fi 1160 @cp -f $(objtree)/modules.order $(MODLIB)/ 1161 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1162 1163# This depmod is only for convenience to give the initial 1164# boot a modules.dep even before / is mounted read-write. However the 1165# boot script depmod is the master version. 1166PHONY += _modinst_post 1167_modinst_post: _modinst_ 1168 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1169 $(call cmd,depmod) 1170 1171else # CONFIG_MODULES 1172 1173# Modules not configured 1174# --------------------------------------------------------------------------- 1175 1176modules modules_install: FORCE 1177 @echo 1178 @echo "The present kernel configuration has modules disabled." 1179 @echo "Type 'make config' and enable loadable module support." 1180 @echo "Then build a kernel with module support enabled." 1181 @echo 1182 @exit 1 1183 1184endif # CONFIG_MODULES 1185 1186### 1187# Cleaning is done on three levels. 1188# make clean Delete most generated files 1189# Leave enough to build external modules 1190# make mrproper Delete the current configuration, and all generated files 1191# make distclean Remove editor backup files, patch leftover files and the like 1192 1193# Directories & files removed with 'make clean' 1194CLEAN_DIRS += $(MODVERDIR) 1195CLEAN_FILES += vmlinux System.map \ 1196 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1197 1198# Directories & files removed with 'make mrproper' 1199MRPROPER_DIRS += include/config include2 usr/include include/generated 1200MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1201 include/linux/autoconf.h include/linux/version.h \ 1202 include/linux/utsrelease.h \ 1203 include/linux/bounds.h include/asm*/asm-offsets.h \ 1204 Module.symvers Module.markers tags TAGS cscope* 1205 1206# clean - Delete most, but leave enough to build external modules 1207# 1208clean: rm-dirs := $(CLEAN_DIRS) 1209clean: rm-files := $(CLEAN_FILES) 1210clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1211 1212PHONY += $(clean-dirs) clean archclean 1213$(clean-dirs): 1214 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1215 1216clean: archclean $(clean-dirs) 1217 $(call cmd,rmdirs) 1218 $(call cmd,rmfiles) 1219 @find . $(RCS_FIND_IGNORE) \ 1220 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1221 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1222 -o -name '*.symtypes' -o -name 'modules.order' \ 1223 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \ 1224 -o -name '*.gcno' \) -type f -print | xargs rm -f 1225 1226# mrproper - Delete all generated files, including .config 1227# 1228mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1229mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1230mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1231 1232PHONY += $(mrproper-dirs) mrproper archmrproper 1233$(mrproper-dirs): 1234 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1235 1236mrproper: clean archmrproper $(mrproper-dirs) 1237 $(call cmd,rmdirs) 1238 $(call cmd,rmfiles) 1239 1240# distclean 1241# 1242PHONY += distclean 1243 1244distclean: mrproper 1245 @find $(srctree) $(RCS_FIND_IGNORE) \ 1246 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1247 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1248 -o -name '.*.rej' -o -size 0 \ 1249 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1250 -type f -print | xargs rm -f 1251 1252 1253# Packaging of the kernel to various formats 1254# --------------------------------------------------------------------------- 1255# rpm target kept for backward compatibility 1256package-dir := $(srctree)/scripts/package 1257 1258%pkg: include/config/kernel.release FORCE 1259 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1260rpm: include/config/kernel.release FORCE 1261 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1262 1263 1264# Brief documentation of the typical targets used 1265# --------------------------------------------------------------------------- 1266 1267boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1268boards := $(notdir $(boards)) 1269board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1270board-dirs := $(sort $(notdir $(board-dirs:/=))) 1271 1272help: 1273 @echo 'Cleaning targets:' 1274 @echo ' clean - Remove most generated files but keep the config and' 1275 @echo ' enough build support to build external modules' 1276 @echo ' mrproper - Remove all generated files + config + various backup files' 1277 @echo ' distclean - mrproper + remove editor backup and patch files' 1278 @echo '' 1279 @echo 'Configuration targets:' 1280 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1281 @echo '' 1282 @echo 'Other generic targets:' 1283 @echo ' all - Build all targets marked with [*]' 1284 @echo '* vmlinux - Build the bare kernel' 1285 @echo '* modules - Build all modules' 1286 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1287 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1288 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1289 @echo ' dir/ - Build all files in dir and below' 1290 @echo ' dir/file.[ois] - Build specified target only' 1291 @echo ' dir/file.ko - Build module including final link' 1292 @echo ' modules_prepare - Set up for building external modules' 1293 @echo ' tags/TAGS - Generate tags file for editors' 1294 @echo ' cscope - Generate cscope index' 1295 @echo ' kernelrelease - Output the release version string' 1296 @echo ' kernelversion - Output the version stored in Makefile' 1297 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1298 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1299 echo '' 1300 @echo 'Static analysers' 1301 @echo ' checkstack - Generate a list of stack hogs' 1302 @echo ' namespacecheck - Name space analysis on compiled kernel' 1303 @echo ' versioncheck - Sanity check on version.h usage' 1304 @echo ' includecheck - Check for duplicate included header files' 1305 @echo ' export_report - List the usages of all exported symbols' 1306 @echo ' headers_check - Sanity check on exported headers' 1307 @echo ' headerdep - Detect inclusion cycles in headers'; \ 1308 echo '' 1309 @echo 'Kernel packaging:' 1310 @$(MAKE) $(build)=$(package-dir) help 1311 @echo '' 1312 @echo 'Documentation targets:' 1313 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1314 @echo '' 1315 @echo 'Architecture specific targets ($(SRCARCH)):' 1316 @$(if $(archhelp),$(archhelp),\ 1317 echo ' No architecture specific help defined for $(SRCARCH)') 1318 @echo '' 1319 @$(if $(boards), \ 1320 $(foreach b, $(boards), \ 1321 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1322 echo '') 1323 @$(if $(board-dirs), \ 1324 $(foreach b, $(board-dirs), \ 1325 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1326 printf " %-16s - Show all of the above\\n" help-boards; \ 1327 echo '') 1328 1329 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1330 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1331 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1332 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1333 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1334 @echo '' 1335 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1336 @echo 'For further info see the ./README file' 1337 1338 1339help-board-dirs := $(addprefix help-,$(board-dirs)) 1340 1341help-boards: $(help-board-dirs) 1342 1343boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1344 1345$(help-board-dirs): help-%: 1346 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1347 @$(if $(boards-per-dir), \ 1348 $(foreach b, $(boards-per-dir), \ 1349 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1350 echo '') 1351 1352 1353# Documentation targets 1354# --------------------------------------------------------------------------- 1355%docs: scripts_basic FORCE 1356 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1357 1358else # KBUILD_EXTMOD 1359 1360### 1361# External module support. 1362# When building external modules the kernel used as basis is considered 1363# read-only, and no consistency checks are made and the make 1364# system is not used on the basis kernel. If updates are required 1365# in the basis kernel ordinary make commands (without M=...) must 1366# be used. 1367# 1368# The following are the only valid targets when building external 1369# modules. 1370# make M=dir clean Delete all automatically generated files 1371# make M=dir modules Make all modules in specified dir 1372# make M=dir Same as 'make M=dir modules' 1373# make M=dir modules_install 1374# Install the modules built in the module directory 1375# Assumes install directory is already created 1376 1377# We are always building modules 1378KBUILD_MODULES := 1 1379PHONY += crmodverdir 1380crmodverdir: 1381 $(cmd_crmodverdir) 1382 1383PHONY += $(objtree)/Module.symvers 1384$(objtree)/Module.symvers: 1385 @test -e $(objtree)/Module.symvers || ( \ 1386 echo; \ 1387 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1388 echo " is missing; modules will have no dependencies and modversions."; \ 1389 echo ) 1390 1391module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1392PHONY += $(module-dirs) modules 1393$(module-dirs): crmodverdir $(objtree)/Module.symvers 1394 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1395 1396modules: $(module-dirs) 1397 @$(kecho) ' Building modules, stage 2.'; 1398 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1399 1400PHONY += modules_install 1401modules_install: _emodinst_ _emodinst_post 1402 1403install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1404PHONY += _emodinst_ 1405_emodinst_: 1406 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1407 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1408 1409PHONY += _emodinst_post 1410_emodinst_post: _emodinst_ 1411 $(call cmd,depmod) 1412 1413clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1414 1415PHONY += $(clean-dirs) clean 1416$(clean-dirs): 1417 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1418 1419clean: rm-dirs := $(MODVERDIR) 1420clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ 1421 $(KBUILD_EXTMOD)/Module.markers \ 1422 $(KBUILD_EXTMOD)/modules.order 1423clean: $(clean-dirs) 1424 $(call cmd,rmdirs) 1425 $(call cmd,rmfiles) 1426 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1427 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1428 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1429 -o -name '*.gcno' \) -type f -print | xargs rm -f 1430 1431help: 1432 @echo ' Building external modules.' 1433 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1434 @echo '' 1435 @echo ' modules - default target, build the module(s)' 1436 @echo ' modules_install - install the module' 1437 @echo ' clean - remove generated files in module directory only' 1438 @echo '' 1439 1440# Dummies... 1441PHONY += prepare scripts 1442prepare: ; 1443scripts: ; 1444endif # KBUILD_EXTMOD 1445 1446# Generate tags for editors 1447# --------------------------------------------------------------------------- 1448quiet_cmd_tags = GEN $@ 1449 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1450 1451tags TAGS cscope: FORCE 1452 $(call cmd,tags) 1453 1454# Scripts to check various things for consistency 1455# --------------------------------------------------------------------------- 1456 1457includecheck: 1458 find * $(RCS_FIND_IGNORE) \ 1459 -name '*.[hcS]' -type f -print | sort \ 1460 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1461 1462versioncheck: 1463 find * $(RCS_FIND_IGNORE) \ 1464 -name '*.[hcS]' -type f -print | sort \ 1465 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1466 1467namespacecheck: 1468 $(PERL) $(srctree)/scripts/namespace.pl 1469 1470export_report: 1471 $(PERL) $(srctree)/scripts/export_report.pl 1472 1473endif #ifeq ($(config-targets),1) 1474endif #ifeq ($(mixed-targets),1) 1475 1476PHONY += checkstack kernelrelease kernelversion 1477 1478# UML needs a little special treatment here. It wants to use the host 1479# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1480# else wants $(ARCH), including people doing cross-builds, which means 1481# that $(SUBARCH) doesn't work here. 1482ifeq ($(ARCH), um) 1483CHECKSTACK_ARCH := $(SUBARCH) 1484else 1485CHECKSTACK_ARCH := $(ARCH) 1486endif 1487checkstack: 1488 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1489 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1490 1491kernelrelease: 1492 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1493 $(error kernelrelease not valid - run 'make prepare' to update it)) 1494kernelversion: 1495 @echo $(KERNELVERSION) 1496 1497# Single targets 1498# --------------------------------------------------------------------------- 1499# Single targets are compatible with: 1500# - build with mixed source and output 1501# - build with separate output dir 'make O=...' 1502# - external modules 1503# 1504# target-dir => where to store outputfile 1505# build-dir => directory in kernel source tree to use 1506 1507ifeq ($(KBUILD_EXTMOD),) 1508 build-dir = $(patsubst %/,%,$(dir $@)) 1509 target-dir = $(dir $@) 1510else 1511 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1512 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1513 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1514endif 1515 1516%.s: %.c prepare scripts FORCE 1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1518%.i: %.c prepare scripts FORCE 1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1520%.o: %.c prepare scripts FORCE 1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1522%.lst: %.c prepare scripts FORCE 1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1524%.s: %.S prepare scripts FORCE 1525 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1526%.o: %.S prepare scripts FORCE 1527 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1528%.symtypes: %.c prepare scripts FORCE 1529 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1530 1531# Modules 1532/: prepare scripts FORCE 1533 $(cmd_crmodverdir) 1534 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1535 $(build)=$(build-dir) 1536%/: prepare scripts FORCE 1537 $(cmd_crmodverdir) 1538 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1539 $(build)=$(build-dir) 1540%.ko: prepare scripts FORCE 1541 $(cmd_crmodverdir) 1542 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1543 $(build)=$(build-dir) $(@:.ko=.o) 1544 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1545 1546# FIXME Should go into a make.lib or something 1547# =========================================================================== 1548 1549quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1550 cmd_rmdirs = rm -rf $(rm-dirs) 1551 1552quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1553 cmd_rmfiles = rm -f $(rm-files) 1554 1555# Run depmod only if we have System.map and depmod is executable 1556quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1557 cmd_depmod = \ 1558 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1559 $(DEPMOD) -ae -F System.map \ 1560 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1561 $(KERNELRELEASE); \ 1562 fi 1563 1564# Create temporary dir for module support files 1565# clean it up only when building all modules 1566cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1567 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1568 1569a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1570 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1571 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1572 1573quiet_cmd_as_o_S = AS $@ 1574cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1575 1576# read all saved command lines 1577 1578targets := $(wildcard $(sort $(targets))) 1579cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1580 1581ifneq ($(cmd_files),) 1582 $(cmd_files): ; # Do not try to update included dependency files 1583 include $(cmd_files) 1584endif 1585 1586# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1587# Usage: 1588# $(Q)$(MAKE) $(clean)=dir 1589clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1590 1591endif # skip-makefile 1592 1593PHONY += FORCE 1594FORCE: 1595 1596# Declare the contents of the .PHONY variable as phony. We keep that 1597# information in a variable so we can use it in if_changed and friends. 1598.PHONY: $(PHONY) 1599