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)) 143TOPDIR := $(srctree) 144# FIXME - TOPDIR is obsolete, use srctree/objtree 145objtree := $(CURDIR) 146src := $(srctree) 147obj := $(objtree) 148 149VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))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