1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 29 4EXTRAVERSION = -rc8 5NAME = Erotic Pickled Herring 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 38ifdef V 39 ifeq ("$(origin V)", "command line") 40 KBUILD_VERBOSE = $(V) 41 endif 42endif 43ifndef KBUILD_VERBOSE 44 KBUILD_VERBOSE = 0 45endif 46 47# Call a source code checker (by default, "sparse") as part of the 48# C compilation. 49# 50# Use 'make C=1' to enable checking of only re-compiled files. 51# Use 'make C=2' to enable checking of *all* source files, regardless 52# of whether they are re-compiled or not. 53# 54# See the file "Documentation/sparse.txt" for more details, including 55# where to get the "sparse" utility. 56 57ifdef C 58 ifeq ("$(origin C)", "command line") 59 KBUILD_CHECKSRC = $(C) 60 endif 61endif 62ifndef KBUILD_CHECKSRC 63 KBUILD_CHECKSRC = 0 64endif 65 66# Use make M=dir to specify directory of external module to build 67# Old syntax make ... SUBDIRS=$PWD is still supported 68# Setting the environment variable KBUILD_EXTMOD take precedence 69ifdef SUBDIRS 70 KBUILD_EXTMOD ?= $(SUBDIRS) 71endif 72ifdef M 73 ifeq ("$(origin M)", "command line") 74 KBUILD_EXTMOD := $(M) 75 endif 76endif 77 78 79# kbuild supports saving output files in a separate directory. 80# To locate output files in a separate directory two syntaxes are supported. 81# In both cases the working directory must be the root of the kernel src. 82# 1) O= 83# Use "make O=dir/to/store/output/files/" 84# 85# 2) Set KBUILD_OUTPUT 86# Set the environment variable KBUILD_OUTPUT to point to the directory 87# where the output files shall be placed. 88# export KBUILD_OUTPUT=dir/to/store/output/files/ 89# make 90# 91# The O= assignment takes precedence over the KBUILD_OUTPUT environment 92# variable. 93 94 95# KBUILD_SRC is set on invocation of make in OBJ directory 96# KBUILD_SRC is not intended to be used by the regular user (for now) 97ifeq ($(KBUILD_SRC),) 98 99# OK, Make called in directory where kernel src resides 100# Do we want to locate output files in a separate directory? 101ifdef O 102 ifeq ("$(origin O)", "command line") 103 KBUILD_OUTPUT := $(O) 104 endif 105endif 106 107# That's our default target when none is given on the command line 108PHONY := _all 109_all: 110 111# Cancel implicit rules on top Makefile 112$(CURDIR)/Makefile Makefile: ; 113 114ifneq ($(KBUILD_OUTPUT),) 115# Invoke a second make in the output directory, passing relevant variables 116# check that the output directory actually exists 117saved-output := $(KBUILD_OUTPUT) 118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 119$(if $(KBUILD_OUTPUT),, \ 120 $(error output directory "$(saved-output)" does not exist)) 121 122PHONY += $(MAKECMDGOALS) sub-make 123 124$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 125 $(Q)@: 126 127sub-make: FORCE 128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 129 KBUILD_SRC=$(CURDIR) \ 130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 131 $(filter-out _all sub-make,$(MAKECMDGOALS)) 132 133# Leave processing to above invocation of make 134skip-makefile := 1 135endif # ifneq ($(KBUILD_OUTPUT),) 136endif # ifeq ($(KBUILD_SRC),) 137 138# We process the rest of the Makefile if this is the final invocation of make 139ifeq ($(skip-makefile),) 140 141# If building an external module we do not care about the all: rule 142# but instead _all depend on modules 143PHONY += all 144ifeq ($(KBUILD_EXTMOD),) 145_all: all 146else 147_all: modules 148endif 149 150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 151TOPDIR := $(srctree) 152# FIXME - TOPDIR is obsolete, use srctree/objtree 153objtree := $(CURDIR) 154src := $(srctree) 155obj := $(objtree) 156 157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 158 159export srctree objtree VPATH TOPDIR 160 161 162# SUBARCH tells the usermode build what the underlying arch is. That is set 163# first, and if a usermode build is happening, the "ARCH=um" on the command 164# line overrides the setting of ARCH below. If a native build is happening, 165# then ARCH is assigned, getting whatever value it gets normally, and 166# SUBARCH is subsequently ignored. 167 168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 169 -e s/arm.*/arm/ -e s/sa110/arm/ \ 170 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 172 -e s/sh.*/sh/ ) 173 174# Cross compiling and selecting different set of gcc/bin-utils 175# --------------------------------------------------------------------------- 176# 177# When performing cross compilation for other architectures ARCH shall be set 178# to the target architecture. (See arch/* for the possibilities). 179# ARCH can be set during invocation of make: 180# make ARCH=ia64 181# Another way is to have ARCH set in the environment. 182# The default ARCH is the host where make is executed. 183 184# CROSS_COMPILE specify the prefix used for all executables used 185# during compilation. Only gcc and related bin-utils executables 186# are prefixed with $(CROSS_COMPILE). 187# CROSS_COMPILE can be set on the command line 188# make CROSS_COMPILE=ia64-linux- 189# Alternatively CROSS_COMPILE can be set in the environment. 190# Default value for CROSS_COMPILE is not to prefix executables 191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 192export KBUILD_BUILDHOST := $(SUBARCH) 193ARCH ?= $(SUBARCH) 194CROSS_COMPILE ?= 195 196# Architecture as present in compile.h 197UTS_MACHINE := $(ARCH) 198SRCARCH := $(ARCH) 199 200# Additional ARCH settings for x86 201ifeq ($(ARCH),i386) 202 SRCARCH := x86 203endif 204ifeq ($(ARCH),x86_64) 205 SRCARCH := x86 206endif 207 208# Additional ARCH settings for sparc 209ifeq ($(ARCH),sparc64) 210 SRCARCH := sparc 211endif 212 213# Where to locate arch specific headers 214hdr-arch := $(SRCARCH) 215 216ifeq ($(ARCH),m68knommu) 217 hdr-arch := m68k 218endif 219 220KCONFIG_CONFIG ?= .config 221 222# SHELL used by kbuild 223CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 224 else if [ -x /bin/bash ]; then echo /bin/bash; \ 225 else echo sh; fi ; fi) 226 227HOSTCC = gcc 228HOSTCXX = g++ 229HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 230HOSTCXXFLAGS = -O2 231 232# Decide whether to build built-in, modular, or both. 233# Normally, just do built-in. 234 235KBUILD_MODULES := 236KBUILD_BUILTIN := 1 237 238# If we have only "make modules", don't compile built-in objects. 239# When we're building modules with modversions, we need to consider 240# the built-in objects during the descend as well, in order to 241# make sure the checksums are up to date before we record them. 242 243ifeq ($(MAKECMDGOALS),modules) 244 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 245endif 246 247# If we have "make <whatever> modules", compile modules 248# in addition to whatever we do anyway. 249# Just "make" or "make all" shall build modules as well 250 251ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 252 KBUILD_MODULES := 1 253endif 254 255ifeq ($(MAKECMDGOALS),) 256 KBUILD_MODULES := 1 257endif 258 259export KBUILD_MODULES KBUILD_BUILTIN 260export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 261 262# Beautify output 263# --------------------------------------------------------------------------- 264# 265# Normally, we echo the whole command before executing it. By making 266# that echo $($(quiet)$(cmd)), we now have the possibility to set 267# $(quiet) to choose other forms of output instead, e.g. 268# 269# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 270# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 271# 272# If $(quiet) is empty, the whole command will be printed. 273# If it is set to "quiet_", only the short version will be printed. 274# If it is set to "silent_", nothing will be printed at all, since 275# the variable $(silent_cmd_cc_o_c) doesn't exist. 276# 277# A simple variant is to prefix commands with $(Q) - that's useful 278# for commands that shall be hidden in non-verbose mode. 279# 280# $(Q)ln $@ :< 281# 282# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 283# If KBUILD_VERBOSE equals 1 then the above command is displayed. 284 285ifeq ($(KBUILD_VERBOSE),1) 286 quiet = 287 Q = 288else 289 quiet=quiet_ 290 Q = @ 291endif 292 293# If the user is running make -s (silent mode), suppress echoing of 294# commands 295 296ifneq ($(findstring s,$(MAKEFLAGS)),) 297 quiet=silent_ 298endif 299 300export quiet Q KBUILD_VERBOSE 301 302 303# Look for make include files relative to root of kernel src 304MAKEFLAGS += --include-dir=$(srctree) 305 306# We need some generic definitions (do not try to remake the file). 307$(srctree)/scripts/Kbuild.include: ; 308include $(srctree)/scripts/Kbuild.include 309 310# Make variables (CC, etc...) 311 312AS = $(CROSS_COMPILE)as 313LD = $(CROSS_COMPILE)ld 314CC = $(CROSS_COMPILE)gcc 315CPP = $(CC) -E 316AR = $(CROSS_COMPILE)ar 317NM = $(CROSS_COMPILE)nm 318STRIP = $(CROSS_COMPILE)strip 319OBJCOPY = $(CROSS_COMPILE)objcopy 320OBJDUMP = $(CROSS_COMPILE)objdump 321AWK = awk 322GENKSYMS = scripts/genksyms/genksyms 323DEPMOD = /sbin/depmod 324KALLSYMS = scripts/kallsyms 325PERL = perl 326CHECK = sparse 327 328CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 329 -Wbitwise -Wno-return-void $(CF) 330MODFLAGS = -DMODULE 331CFLAGS_MODULE = $(MODFLAGS) 332AFLAGS_MODULE = $(MODFLAGS) 333LDFLAGS_MODULE = 334CFLAGS_KERNEL = 335AFLAGS_KERNEL = 336 337 338# Use LINUXINCLUDE when you must reference the include/ directory. 339# Needed to be compatible with the O= option 340LINUXINCLUDE := -Iinclude \ 341 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 342 -I$(srctree)/arch/$(hdr-arch)/include \ 343 -include include/linux/autoconf.h 344 345KBUILD_CPPFLAGS := -D__KERNEL__ 346 347KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 348 -fno-strict-aliasing -fno-common \ 349 -Werror-implicit-function-declaration 350KBUILD_AFLAGS := -D__ASSEMBLY__ 351 352# Read KERNELRELEASE from include/config/kernel.release (if it exists) 353KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 354KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 355 356export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 357export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 358export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS 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 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 540ifdef CONFIG_FRAME_POINTER 541KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 542else 543KBUILD_CFLAGS += -fomit-frame-pointer 544endif 545 546ifdef CONFIG_DEBUG_INFO 547KBUILD_CFLAGS += -g 548KBUILD_AFLAGS += -gdwarf-2 549endif 550 551ifdef CONFIG_FUNCTION_TRACER 552KBUILD_CFLAGS += -pg 553endif 554 555# We trigger additional mismatches with less inlining 556ifdef CONFIG_DEBUG_SECTION_MISMATCH 557KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 558endif 559 560# arch Makefile may override CC so keep this after arch Makefile is included 561NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 562CHECKFLAGS += $(NOSTDINC_FLAGS) 563 564# warn about C99 declaration after statement 565KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 566 567# disable pointer signed / unsigned warnings in gcc 4.0 568KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 569 570# disable invalid "can't wrap" optimzations for signed / pointers 571KBUILD_CFLAGS += $(call cc-option,-fwrapv) 572 573# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 574# But warn user when we do so 575warn-assign = \ 576$(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 += $(LDFLAGS_BUILD_ID) 596 597# Default kernel image to build when no specific target is given. 598# KBUILD_IMAGE may be overruled on the command line or 599# set in the environment 600# Also any assignments in arch/$(ARCH)/Makefile take precedence over 601# this default value 602export KBUILD_IMAGE ?= vmlinux 603 604# 605# INSTALL_PATH specifies where to place the updated kernel and system map 606# images. Default is /boot, but you can set it to other values 607export INSTALL_PATH ?= /boot 608 609# 610# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 611# relocations required by build roots. This is not defined in the 612# makefile but the argument can be passed to make if needed. 613# 614 615MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 616export MODLIB 617 618# 619# INSTALL_MOD_STRIP, if defined, will cause modules to be 620# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 621# the default option --strip-debug will be used. Otherwise, 622# INSTALL_MOD_STRIP will used as the options to the strip command. 623 624ifdef INSTALL_MOD_STRIP 625ifeq ($(INSTALL_MOD_STRIP),1) 626mod_strip_cmd = $(STRIP) --strip-debug 627else 628mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 629endif # INSTALL_MOD_STRIP=1 630else 631mod_strip_cmd = true 632endif # INSTALL_MOD_STRIP 633export mod_strip_cmd 634 635 636ifeq ($(KBUILD_EXTMOD),) 637core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 638 639vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 640 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 641 $(net-y) $(net-m) $(libs-y) $(libs-m))) 642 643vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 644 $(init-n) $(init-) \ 645 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 646 $(net-n) $(net-) $(libs-n) $(libs-)))) 647 648init-y := $(patsubst %/, %/built-in.o, $(init-y)) 649core-y := $(patsubst %/, %/built-in.o, $(core-y)) 650drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 651net-y := $(patsubst %/, %/built-in.o, $(net-y)) 652libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 653libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 654libs-y := $(libs-y1) $(libs-y2) 655 656# Build vmlinux 657# --------------------------------------------------------------------------- 658# vmlinux is built from the objects selected by $(vmlinux-init) and 659# $(vmlinux-main). Most are built-in.o files from top-level directories 660# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 661# Ordering when linking is important, and $(vmlinux-init) must be first. 662# 663# vmlinux 664# ^ 665# | 666# +-< $(vmlinux-init) 667# | +--< init/version.o + more 668# | 669# +--< $(vmlinux-main) 670# | +--< driver/built-in.o mm/built-in.o + more 671# | 672# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 673# 674# vmlinux version (uname -v) cannot be updated during normal 675# descending-into-subdirs phase since we do not yet know if we need to 676# update vmlinux. 677# Therefore this step is delayed until just before final link of vmlinux - 678# except in the kallsyms case where it is done just before adding the 679# symbols to the kernel. 680# 681# System.map is generated to document addresses of all kernel symbols 682 683vmlinux-init := $(head-y) $(init-y) 684vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 685vmlinux-all := $(vmlinux-init) $(vmlinux-main) 686vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 687export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 688 689# Rule to link vmlinux - also used during CONFIG_KALLSYMS 690# May be overridden by arch/$(ARCH)/Makefile 691quiet_cmd_vmlinux__ ?= LD $@ 692 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 693 -T $(vmlinux-lds) $(vmlinux-init) \ 694 --start-group $(vmlinux-main) --end-group \ 695 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 696 697# Generate new vmlinux version 698quiet_cmd_vmlinux_version = GEN .version 699 cmd_vmlinux_version = set -e; \ 700 if [ ! -r .version ]; then \ 701 rm -f .version; \ 702 echo 1 >.version; \ 703 else \ 704 mv .version .old_version; \ 705 expr 0$$(cat .old_version) + 1 >.version; \ 706 fi; \ 707 $(MAKE) $(build)=init 708 709# Generate System.map 710quiet_cmd_sysmap = SYSMAP 711 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 712 713# Link of vmlinux 714# If CONFIG_KALLSYMS is set .version is already updated 715# Generate System.map and verify that the content is consistent 716# Use + in front of the vmlinux_version rule to silent warning with make -j2 717# First command is ':' to allow us to use + in front of the rule 718define rule_vmlinux__ 719 : 720 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 721 722 $(call cmd,vmlinux__) 723 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 724 725 $(Q)$(if $($(quiet)cmd_sysmap), \ 726 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 727 $(cmd_sysmap) $@ System.map; \ 728 if [ $$? -ne 0 ]; then \ 729 rm -f $@; \ 730 /bin/false; \ 731 fi; 732 $(verify_kallsyms) 733endef 734 735 736ifdef CONFIG_KALLSYMS 737# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 738# It's a three stage process: 739# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 740# empty 741# Running kallsyms on that gives us .tmp_kallsyms1.o with 742# the right size - vmlinux version (uname -v) is updated during this step 743# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 744# but due to the added section, some addresses have shifted. 745# From here, we generate a correct .tmp_kallsyms2.o 746# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 747# o Verify that the System.map from vmlinux matches the map from 748# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 749# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 750# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 751# temporary bypass to allow the kernel to be built while the 752# maintainers work out what went wrong with kallsyms. 753 754ifdef CONFIG_KALLSYMS_EXTRA_PASS 755last_kallsyms := 3 756else 757last_kallsyms := 2 758endif 759 760kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 761 762define verify_kallsyms 763 $(Q)$(if $($(quiet)cmd_sysmap), \ 764 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 765 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 766 $(Q)cmp -s System.map .tmp_System.map || \ 767 (echo Inconsistent kallsyms data; \ 768 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 769 rm .tmp_kallsyms* ; /bin/false ) 770endef 771 772# Update vmlinux version before link 773# Use + in front of this rule to silent warning about make -j1 774# First command is ':' to allow us to use + in front of this rule 775cmd_ksym_ld = $(cmd_vmlinux__) 776define rule_ksym_ld 777 : 778 +$(call cmd,vmlinux_version) 779 $(call cmd,vmlinux__) 780 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 781endef 782 783# Generate .S file with all kernel symbols 784quiet_cmd_kallsyms = KSYM $@ 785 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 786 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 787 788.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 789 $(call if_changed_dep,as_o_S) 790 791.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 792 $(call cmd,kallsyms) 793 794# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 795.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 796 $(call if_changed_rule,ksym_ld) 797 798.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 799 $(call if_changed,vmlinux__) 800 801.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 802 $(call if_changed,vmlinux__) 803 804# Needs to visit scripts/ before $(KALLSYMS) can be used. 805$(KALLSYMS): scripts ; 806 807# Generate some data for debugging strange kallsyms problems 808debug_kallsyms: .tmp_map$(last_kallsyms) 809 810.tmp_map%: .tmp_vmlinux% FORCE 811 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 812 813.tmp_map3: .tmp_map2 814 815.tmp_map2: .tmp_map1 816 817endif # ifdef CONFIG_KALLSYMS 818 819# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 820# relevant sections renamed as per the linker script. 821quiet_cmd_vmlinux-modpost = LD $@ 822 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 823 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 824 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 825define rule_vmlinux-modpost 826 : 827 +$(call cmd,vmlinux-modpost) 828 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 829 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 830endef 831 832# vmlinux image - including updated kernel symbols 833vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 834ifdef CONFIG_HEADERS_CHECK 835 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 836endif 837ifdef CONFIG_SAMPLES 838 $(Q)$(MAKE) $(build)=samples 839endif 840ifdef CONFIG_BUILD_DOCSRC 841 $(Q)$(MAKE) $(build)=Documentation 842endif 843 $(call vmlinux-modpost) 844 $(call if_changed_rule,vmlinux__) 845 $(Q)rm -f .old_version 846 847# build vmlinux.o first to catch section mismatch errors early 848ifdef CONFIG_KALLSYMS 849.tmp_vmlinux1: vmlinux.o 850endif 851 852modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 853vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 854 $(call if_changed_rule,vmlinux-modpost) 855 856# The actual objects are generated when descending, 857# make sure no implicit rule kicks in 858$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 859 860# Handle descending into subdirectories listed in $(vmlinux-dirs) 861# Preset locale variables to speed up the build process. Limit locale 862# tweaks to this spot to avoid wrong language settings when running 863# make menuconfig etc. 864# Error messages still appears in the original language 865 866PHONY += $(vmlinux-dirs) 867$(vmlinux-dirs): prepare scripts 868 $(Q)$(MAKE) $(build)=$@ 869 870# Build the kernel release string 871# 872# The KERNELRELEASE value built here is stored in the file 873# include/config/kernel.release, and is used when executing several 874# make targets, such as "make install" or "make modules_install." 875# 876# The eventual kernel release string consists of the following fields, 877# shown in a hierarchical format to show how smaller parts are concatenated 878# to form the larger and final value, with values coming from places like 879# the Makefile, kernel config options, make command line options and/or 880# SCM tag information. 881# 882# $(KERNELVERSION) 883# $(VERSION) eg, 2 884# $(PATCHLEVEL) eg, 6 885# $(SUBLEVEL) eg, 18 886# $(EXTRAVERSION) eg, -rc6 887# $(localver-full) 888# $(localver) 889# localversion* (files without backups, containing '~') 890# $(CONFIG_LOCALVERSION) (from kernel config setting) 891# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 892# ./scripts/setlocalversion (SCM tag, if one exists) 893# $(LOCALVERSION) (from make command line if provided) 894# 895# Note how the final $(localver-auto) string is included *only* if the 896# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 897# moment, only git is supported but other SCMs can edit the script 898# scripts/setlocalversion and add the appropriate checks as needed. 899 900pattern = ".*/localversion[^~]*" 901string = $(shell cat /dev/null \ 902 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 903 904localver = $(subst $(space),, $(string) \ 905 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 906 907# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 908# and if the SCM is know a tag from the SCM is appended. 909# The appended tag is determined by the SCM used. 910# 911# .scmversion is used when generating rpm packages so we do not loose 912# the version information from the SCM when we do the build of the kernel 913# from the copied source 914ifdef CONFIG_LOCALVERSION_AUTO 915 916ifeq ($(wildcard .scmversion),) 917 _localver-auto = $(shell $(CONFIG_SHELL) \ 918 $(srctree)/scripts/setlocalversion $(srctree)) 919else 920 _localver-auto = $(shell cat .scmversion 2> /dev/null) 921endif 922 923 localver-auto = $(LOCALVERSION)$(_localver-auto) 924endif 925 926localver-full = $(localver)$(localver-auto) 927 928# Store (new) KERNELRELASE string in include/config/kernel.release 929kernelrelease = $(KERNELVERSION)$(localver-full) 930include/config/kernel.release: include/config/auto.conf FORCE 931 $(Q)rm -f $@ 932 $(Q)echo $(kernelrelease) > $@ 933 934 935# Things we need to do before we recursively start building the kernel 936# or the modules are listed in "prepare". 937# A multi level approach is used. prepareN is processed before prepareN-1. 938# archprepare is used in arch Makefiles and when processed asm symlink, 939# version.h and scripts_basic is processed / created. 940 941# Listed in dependency order 942PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 943 944# prepare3 is used to check if we are building in a separate output directory, 945# and if so do: 946# 1) Check that make has not been executed in the kernel src $(srctree) 947# 2) Create the include2 directory, used for the second asm symlink 948prepare3: include/config/kernel.release 949ifneq ($(KBUILD_SRC),) 950 @$(kecho) ' Using $(srctree) as source for kernel' 951 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 952 echo " $(srctree) is not clean, please run 'make mrproper'";\ 953 echo " in the '$(srctree)' directory.";\ 954 /bin/false; \ 955 fi; 956 $(Q)if [ ! -d include2 ]; then \ 957 mkdir -p include2; \ 958 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 959 fi 960endif 961 962# prepare2 creates a makefile if using a separate output directory 963prepare2: prepare3 outputmakefile 964 965prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 966 include/asm include/config/auto.conf 967 $(cmd_crmodverdir) 968 969archprepare: prepare1 scripts_basic 970 971prepare0: archprepare FORCE 972 $(Q)$(MAKE) $(build)=. 973 $(Q)$(MAKE) $(build)=. missing-syscalls 974 975# All the preparing.. 976prepare: prepare0 977 978# Leave this as default for preprocessing vmlinux.lds.S, which is now 979# done in arch/$(ARCH)/kernel/Makefile 980 981export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 982 983# The asm symlink changes when $(ARCH) changes. 984# Detect this and ask user to run make mrproper 985# If asm is a stale symlink (point to dir that does not exist) remove it 986define check-symlink 987 set -e; \ 988 if [ -L include/asm ]; then \ 989 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 990 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 991 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 992 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 993 exit 1; \ 994 fi; \ 995 test -e $$asmlink || rm include/asm; \ 996 elif [ -d include/asm ]; then \ 997 echo "ERROR: $@ is a directory but a symlink was expected";\ 998 exit 1; \ 999 fi 1000endef 1001 1002# We create the target directory of the symlink if it does 1003# not exist so the test in check-symlink works and we have a 1004# directory for generated filesas used by some architectures. 1005define create-symlink 1006 if [ ! -L include/asm ]; then \ 1007 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 1008 if [ ! -d include/asm-$(SRCARCH) ]; then \ 1009 mkdir -p include/asm-$(SRCARCH); \ 1010 fi; \ 1011 ln -fsn asm-$(SRCARCH) $@; \ 1012 fi 1013endef 1014 1015include/asm: FORCE 1016 $(Q)$(check-symlink) 1017 $(Q)$(create-symlink) 1018 1019# Generate some files 1020# --------------------------------------------------------------------------- 1021 1022# KERNELRELEASE can change from a few different places, meaning version.h 1023# needs to be updated, so this check is forced on all builds 1024 1025uts_len := 64 1026define filechk_utsrelease.h 1027 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1028 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1029 exit 1; \ 1030 fi; \ 1031 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1032endef 1033 1034define filechk_version.h 1035 (echo \#define LINUX_VERSION_CODE $(shell \ 1036 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1037 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1038endef 1039 1040include/linux/version.h: $(srctree)/Makefile FORCE 1041 $(call filechk,version.h) 1042 1043include/linux/utsrelease.h: include/config/kernel.release FORCE 1044 $(call filechk,utsrelease.h) 1045 1046PHONY += headerdep 1047headerdep: 1048 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 1049 1050# --------------------------------------------------------------------------- 1051 1052PHONY += depend dep 1053depend dep: 1054 @echo '*** Warning: make $@ is unnecessary now.' 1055 1056# --------------------------------------------------------------------------- 1057# Firmware install 1058INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1059export INSTALL_FW_PATH 1060 1061PHONY += firmware_install 1062firmware_install: FORCE 1063 @mkdir -p $(objtree)/firmware 1064 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1065 1066# --------------------------------------------------------------------------- 1067# Kernel headers 1068 1069#Default location for installed headers 1070export INSTALL_HDR_PATH = $(objtree)/usr 1071 1072hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1073# Find out where the Kbuild file is located to support 1074# arch/$(ARCH)/include/asm 1075hdr-dir = $(strip \ 1076 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1077 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1078 1079# If we do an all arch process set dst to asm-$(hdr-arch) 1080hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1081 1082PHONY += __headers 1083__headers: include/linux/version.h scripts_basic FORCE 1084 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1085 1086PHONY += headers_install_all 1087headers_install_all: 1088 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1089 1090PHONY += headers_install 1091headers_install: __headers 1092 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1093 $(error Headers not exportable for the $(SRCARCH) architecture)) 1094 $(Q)$(MAKE) $(hdr-inst)=include 1095 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1096 1097PHONY += headers_check_all 1098headers_check_all: headers_install_all 1099 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1100 1101PHONY += headers_check 1102headers_check: headers_install 1103 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1104 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1105 1106# --------------------------------------------------------------------------- 1107# Modules 1108 1109ifdef CONFIG_MODULES 1110 1111# By default, build modules as well 1112 1113all: modules 1114 1115# Build modules 1116# 1117# A module can be listed more than once in obj-m resulting in 1118# duplicate lines in modules.order files. Those are removed 1119# using awk while concatenating to the final file. 1120 1121PHONY += modules 1122modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1123 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1124 @$(kecho) ' Building modules, stage 2.'; 1125 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1126 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1127 1128 1129# Target to prepare building external modules 1130PHONY += modules_prepare 1131modules_prepare: prepare scripts 1132 1133# Target to install modules 1134PHONY += modules_install 1135modules_install: _modinst_ _modinst_post 1136 1137PHONY += _modinst_ 1138_modinst_: 1139 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1140 echo "Warning: you may need to install module-init-tools"; \ 1141 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1142 sleep 1; \ 1143 fi 1144 @rm -rf $(MODLIB)/kernel 1145 @rm -f $(MODLIB)/source 1146 @mkdir -p $(MODLIB)/kernel 1147 @ln -s $(srctree) $(MODLIB)/source 1148 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1149 rm -f $(MODLIB)/build ; \ 1150 ln -s $(objtree) $(MODLIB)/build ; \ 1151 fi 1152 @cp -f $(objtree)/modules.order $(MODLIB)/ 1153 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1154 1155# This depmod is only for convenience to give the initial 1156# boot a modules.dep even before / is mounted read-write. However the 1157# boot script depmod is the master version. 1158PHONY += _modinst_post 1159_modinst_post: _modinst_ 1160 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1161 $(call cmd,depmod) 1162 1163else # CONFIG_MODULES 1164 1165# Modules not configured 1166# --------------------------------------------------------------------------- 1167 1168modules modules_install: FORCE 1169 @echo 1170 @echo "The present kernel configuration has modules disabled." 1171 @echo "Type 'make config' and enable loadable module support." 1172 @echo "Then build a kernel with module support enabled." 1173 @echo 1174 @exit 1 1175 1176endif # CONFIG_MODULES 1177 1178### 1179# Cleaning is done on three levels. 1180# make clean Delete most generated files 1181# Leave enough to build external modules 1182# make mrproper Delete the current configuration, and all generated files 1183# make distclean Remove editor backup files, patch leftover files and the like 1184 1185# Directories & files removed with 'make clean' 1186CLEAN_DIRS += $(MODVERDIR) 1187CLEAN_FILES += vmlinux System.map \ 1188 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1189 1190# Directories & files removed with 'make mrproper' 1191MRPROPER_DIRS += include/config include2 usr/include 1192MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1193 include/linux/autoconf.h include/linux/version.h \ 1194 include/linux/utsrelease.h \ 1195 include/linux/bounds.h include/asm*/asm-offsets.h \ 1196 Module.symvers Module.markers tags TAGS cscope* 1197 1198# clean - Delete most, but leave enough to build external modules 1199# 1200clean: rm-dirs := $(CLEAN_DIRS) 1201clean: rm-files := $(CLEAN_FILES) 1202clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1203 1204PHONY += $(clean-dirs) clean archclean 1205$(clean-dirs): 1206 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1207 1208clean: archclean $(clean-dirs) 1209 $(call cmd,rmdirs) 1210 $(call cmd,rmfiles) 1211 @find . $(RCS_FIND_IGNORE) \ 1212 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1213 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1214 -o -name '*.symtypes' -o -name 'modules.order' \ 1215 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \ 1216 -type f -print | xargs rm -f 1217 1218# mrproper - Delete all generated files, including .config 1219# 1220mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1221mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1222mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1223 1224PHONY += $(mrproper-dirs) mrproper archmrproper 1225$(mrproper-dirs): 1226 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1227 1228mrproper: clean archmrproper $(mrproper-dirs) 1229 $(call cmd,rmdirs) 1230 $(call cmd,rmfiles) 1231 1232# distclean 1233# 1234PHONY += distclean 1235 1236distclean: mrproper 1237 @find $(srctree) $(RCS_FIND_IGNORE) \ 1238 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1239 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1240 -o -name '.*.rej' -o -size 0 \ 1241 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1242 -type f -print | xargs rm -f 1243 1244 1245# Packaging of the kernel to various formats 1246# --------------------------------------------------------------------------- 1247# rpm target kept for backward compatibility 1248package-dir := $(srctree)/scripts/package 1249 1250%pkg: include/config/kernel.release FORCE 1251 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1252rpm: include/config/kernel.release FORCE 1253 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1254 1255 1256# Brief documentation of the typical targets used 1257# --------------------------------------------------------------------------- 1258 1259boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1260boards := $(notdir $(boards)) 1261board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1262board-dirs := $(sort $(notdir $(board-dirs:/=))) 1263 1264help: 1265 @echo 'Cleaning targets:' 1266 @echo ' clean - Remove most generated files but keep the config and' 1267 @echo ' enough build support to build external modules' 1268 @echo ' mrproper - Remove all generated files + config + various backup files' 1269 @echo ' distclean - mrproper + remove editor backup and patch files' 1270 @echo '' 1271 @echo 'Configuration targets:' 1272 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1273 @echo '' 1274 @echo 'Other generic targets:' 1275 @echo ' all - Build all targets marked with [*]' 1276 @echo '* vmlinux - Build the bare kernel' 1277 @echo '* modules - Build all modules' 1278 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1279 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1280 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1281 @echo ' dir/ - Build all files in dir and below' 1282 @echo ' dir/file.[ois] - Build specified target only' 1283 @echo ' dir/file.ko - Build module including final link' 1284 @echo ' prepare - Set up for building external modules' 1285 @echo ' tags/TAGS - Generate tags file for editors' 1286 @echo ' cscope - Generate cscope index' 1287 @echo ' kernelrelease - Output the release version string' 1288 @echo ' kernelversion - Output the version stored in Makefile' 1289 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1290 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1291 echo '' 1292 @echo 'Static analysers' 1293 @echo ' checkstack - Generate a list of stack hogs' 1294 @echo ' namespacecheck - Name space analysis on compiled kernel' 1295 @echo ' versioncheck - Sanity check on version.h usage' 1296 @echo ' includecheck - Check for duplicate included header files' 1297 @echo ' export_report - List the usages of all exported symbols' 1298 @echo ' headers_check - Sanity check on exported headers' 1299 @echo ' headerdep - Detect inclusion cycles in headers'; \ 1300 echo '' 1301 @echo 'Kernel packaging:' 1302 @$(MAKE) $(build)=$(package-dir) help 1303 @echo '' 1304 @echo 'Documentation targets:' 1305 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1306 @echo '' 1307 @echo 'Architecture specific targets ($(SRCARCH)):' 1308 @$(if $(archhelp),$(archhelp),\ 1309 echo ' No architecture specific help defined for $(SRCARCH)') 1310 @echo '' 1311 @$(if $(boards), \ 1312 $(foreach b, $(boards), \ 1313 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1314 echo '') 1315 @$(if $(board-dirs), \ 1316 $(foreach b, $(board-dirs), \ 1317 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1318 printf " %-16s - Show all of the above\\n" help-boards; \ 1319 echo '') 1320 1321 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1322 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1323 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1324 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1325 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1326 @echo '' 1327 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1328 @echo 'For further info see the ./README file' 1329 1330 1331help-board-dirs := $(addprefix help-,$(board-dirs)) 1332 1333help-boards: $(help-board-dirs) 1334 1335boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1336 1337$(help-board-dirs): help-%: 1338 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1339 @$(if $(boards-per-dir), \ 1340 $(foreach b, $(boards-per-dir), \ 1341 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1342 echo '') 1343 1344 1345# Documentation targets 1346# --------------------------------------------------------------------------- 1347%docs: scripts_basic FORCE 1348 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1349 1350else # KBUILD_EXTMOD 1351 1352### 1353# External module support. 1354# When building external modules the kernel used as basis is considered 1355# read-only, and no consistency checks are made and the make 1356# system is not used on the basis kernel. If updates are required 1357# in the basis kernel ordinary make commands (without M=...) must 1358# be used. 1359# 1360# The following are the only valid targets when building external 1361# modules. 1362# make M=dir clean Delete all automatically generated files 1363# make M=dir modules Make all modules in specified dir 1364# make M=dir Same as 'make M=dir modules' 1365# make M=dir modules_install 1366# Install the modules built in the module directory 1367# Assumes install directory is already created 1368 1369# We are always building modules 1370KBUILD_MODULES := 1 1371PHONY += crmodverdir 1372crmodverdir: 1373 $(cmd_crmodverdir) 1374 1375PHONY += $(objtree)/Module.symvers 1376$(objtree)/Module.symvers: 1377 @test -e $(objtree)/Module.symvers || ( \ 1378 echo; \ 1379 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1380 echo " is missing; modules will have no dependencies and modversions."; \ 1381 echo ) 1382 1383module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1384PHONY += $(module-dirs) modules 1385$(module-dirs): crmodverdir $(objtree)/Module.symvers 1386 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1387 1388modules: $(module-dirs) 1389 @$(kecho) ' Building modules, stage 2.'; 1390 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1391 1392PHONY += modules_install 1393modules_install: _emodinst_ _emodinst_post 1394 1395install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1396PHONY += _emodinst_ 1397_emodinst_: 1398 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1399 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1400 1401PHONY += _emodinst_post 1402_emodinst_post: _emodinst_ 1403 $(call cmd,depmod) 1404 1405clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1406 1407PHONY += $(clean-dirs) clean 1408$(clean-dirs): 1409 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1410 1411clean: rm-dirs := $(MODVERDIR) 1412clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1413clean: $(clean-dirs) 1414 $(call cmd,rmdirs) 1415 $(call cmd,rmfiles) 1416 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1417 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1418 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1419 -type f -print | xargs rm -f 1420 1421help: 1422 @echo ' Building external modules.' 1423 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1424 @echo '' 1425 @echo ' modules - default target, build the module(s)' 1426 @echo ' modules_install - install the module' 1427 @echo ' clean - remove generated files in module directory only' 1428 @echo '' 1429 1430# Dummies... 1431PHONY += prepare scripts 1432prepare: ; 1433scripts: ; 1434endif # KBUILD_EXTMOD 1435 1436# Generate tags for editors 1437# --------------------------------------------------------------------------- 1438quiet_cmd_tags = GEN $@ 1439 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1440 1441tags TAGS cscope: FORCE 1442 $(call cmd,tags) 1443 1444# Scripts to check various things for consistency 1445# --------------------------------------------------------------------------- 1446 1447includecheck: 1448 find * $(RCS_FIND_IGNORE) \ 1449 -name '*.[hcS]' -type f -print | sort \ 1450 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1451 1452versioncheck: 1453 find * $(RCS_FIND_IGNORE) \ 1454 -name '*.[hcS]' -type f -print | sort \ 1455 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1456 1457namespacecheck: 1458 $(PERL) $(srctree)/scripts/namespace.pl 1459 1460export_report: 1461 $(PERL) $(srctree)/scripts/export_report.pl 1462 1463endif #ifeq ($(config-targets),1) 1464endif #ifeq ($(mixed-targets),1) 1465 1466PHONY += checkstack kernelrelease kernelversion 1467 1468# UML needs a little special treatment here. It wants to use the host 1469# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1470# else wants $(ARCH), including people doing cross-builds, which means 1471# that $(SUBARCH) doesn't work here. 1472ifeq ($(ARCH), um) 1473CHECKSTACK_ARCH := $(SUBARCH) 1474else 1475CHECKSTACK_ARCH := $(ARCH) 1476endif 1477checkstack: 1478 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1479 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1480 1481kernelrelease: 1482 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1483 $(error kernelrelease not valid - run 'make prepare' to update it)) 1484kernelversion: 1485 @echo $(KERNELVERSION) 1486 1487# Single targets 1488# --------------------------------------------------------------------------- 1489# Single targets are compatible with: 1490# - build with mixed source and output 1491# - build with separate output dir 'make O=...' 1492# - external modules 1493# 1494# target-dir => where to store outputfile 1495# build-dir => directory in kernel source tree to use 1496 1497ifeq ($(KBUILD_EXTMOD),) 1498 build-dir = $(patsubst %/,%,$(dir $@)) 1499 target-dir = $(dir $@) 1500else 1501 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1502 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1503 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1504endif 1505 1506%.s: %.c prepare scripts FORCE 1507 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1508%.i: %.c prepare scripts FORCE 1509 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1510%.o: %.c prepare scripts FORCE 1511 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1512%.lst: %.c prepare scripts FORCE 1513 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1514%.s: %.S prepare scripts FORCE 1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1516%.o: %.S prepare scripts FORCE 1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1518%.symtypes: %.c prepare scripts FORCE 1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1520 1521# Modules 1522/: prepare scripts FORCE 1523 $(cmd_crmodverdir) 1524 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1525 $(build)=$(build-dir) 1526%/: prepare scripts FORCE 1527 $(cmd_crmodverdir) 1528 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1529 $(build)=$(build-dir) 1530%.ko: prepare scripts FORCE 1531 $(cmd_crmodverdir) 1532 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1533 $(build)=$(build-dir) $(@:.ko=.o) 1534 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1535 1536# FIXME Should go into a make.lib or something 1537# =========================================================================== 1538 1539quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1540 cmd_rmdirs = rm -rf $(rm-dirs) 1541 1542quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1543 cmd_rmfiles = rm -f $(rm-files) 1544 1545# Run depmod only if we have System.map and depmod is executable 1546quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1547 cmd_depmod = \ 1548 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1549 $(DEPMOD) -ae -F System.map \ 1550 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1551 $(KERNELRELEASE); \ 1552 fi 1553 1554# Create temporary dir for module support files 1555# clean it up only when building all modules 1556cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1557 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1558 1559a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1560 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1561 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1562 1563quiet_cmd_as_o_S = AS $@ 1564cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1565 1566# read all saved command lines 1567 1568targets := $(wildcard $(sort $(targets))) 1569cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1570 1571ifneq ($(cmd_files),) 1572 $(cmd_files): ; # Do not try to update included dependency files 1573 include $(cmd_files) 1574endif 1575 1576# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1577# Usage: 1578# $(Q)$(MAKE) $(clean)=dir 1579clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1580 1581endif # skip-makefile 1582 1583PHONY += FORCE 1584FORCE: 1585 1586# Declare the contents of the .PHONY variable as phony. We keep that 1587# information in a variable se we can use it in if_changed and friends. 1588.PHONY: $(PHONY) 1589