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 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[234].*/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# Additional ARCH settings for sh 214ifeq ($(ARCH),sh64) 215 SRCARCH := sh 216endif 217 218# Where to locate arch specific headers 219hdr-arch := $(SRCARCH) 220 221ifeq ($(ARCH),m68knommu) 222 hdr-arch := m68k 223endif 224 225KCONFIG_CONFIG ?= .config 226 227# SHELL used by kbuild 228CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 229 else if [ -x /bin/bash ]; then echo /bin/bash; \ 230 else echo sh; fi ; fi) 231 232HOSTCC = gcc 233HOSTCXX = g++ 234HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 235HOSTCXXFLAGS = -O2 236 237# Decide whether to build built-in, modular, or both. 238# Normally, just do built-in. 239 240KBUILD_MODULES := 241KBUILD_BUILTIN := 1 242 243# If we have only "make modules", don't compile built-in objects. 244# When we're building modules with modversions, we need to consider 245# the built-in objects during the descend as well, in order to 246# make sure the checksums are up to date before we record them. 247 248ifeq ($(MAKECMDGOALS),modules) 249 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 250endif 251 252# If we have "make <whatever> modules", compile modules 253# in addition to whatever we do anyway. 254# Just "make" or "make all" shall build modules as well 255 256ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 257 KBUILD_MODULES := 1 258endif 259 260ifeq ($(MAKECMDGOALS),) 261 KBUILD_MODULES := 1 262endif 263 264export KBUILD_MODULES KBUILD_BUILTIN 265export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 266 267# Beautify output 268# --------------------------------------------------------------------------- 269# 270# Normally, we echo the whole command before executing it. By making 271# that echo $($(quiet)$(cmd)), we now have the possibility to set 272# $(quiet) to choose other forms of output instead, e.g. 273# 274# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 275# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 276# 277# If $(quiet) is empty, the whole command will be printed. 278# If it is set to "quiet_", only the short version will be printed. 279# If it is set to "silent_", nothing will be printed at all, since 280# the variable $(silent_cmd_cc_o_c) doesn't exist. 281# 282# A simple variant is to prefix commands with $(Q) - that's useful 283# for commands that shall be hidden in non-verbose mode. 284# 285# $(Q)ln $@ :< 286# 287# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 288# If KBUILD_VERBOSE equals 1 then the above command is displayed. 289 290ifeq ($(KBUILD_VERBOSE),1) 291 quiet = 292 Q = 293else 294 quiet=quiet_ 295 Q = @ 296endif 297 298# If the user is running make -s (silent mode), suppress echoing of 299# commands 300 301ifneq ($(findstring s,$(MAKEFLAGS)),) 302 quiet=silent_ 303endif 304 305export quiet Q KBUILD_VERBOSE 306 307 308# Look for make include files relative to root of kernel src 309MAKEFLAGS += --include-dir=$(srctree) 310 311# We need some generic definitions (do not try to remake the file). 312$(srctree)/scripts/Kbuild.include: ; 313include $(srctree)/scripts/Kbuild.include 314 315# Make variables (CC, etc...) 316 317AS = $(CROSS_COMPILE)as 318LD = $(CROSS_COMPILE)ld 319CC = $(CROSS_COMPILE)gcc 320CPP = $(CC) -E 321AR = $(CROSS_COMPILE)ar 322NM = $(CROSS_COMPILE)nm 323STRIP = $(CROSS_COMPILE)strip 324OBJCOPY = $(CROSS_COMPILE)objcopy 325OBJDUMP = $(CROSS_COMPILE)objdump 326AWK = awk 327GENKSYMS = scripts/genksyms/genksyms 328DEPMOD = /sbin/depmod 329KALLSYMS = scripts/kallsyms 330PERL = perl 331CHECK = sparse 332 333CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 334 -Wbitwise -Wno-return-void $(CF) 335MODFLAGS = -DMODULE 336CFLAGS_MODULE = $(MODFLAGS) 337AFLAGS_MODULE = $(MODFLAGS) 338LDFLAGS_MODULE = 339CFLAGS_KERNEL = 340AFLAGS_KERNEL = 341 342 343# Use LINUXINCLUDE when you must reference the include/ directory. 344# Needed to be compatible with the O= option 345LINUXINCLUDE := -Iinclude \ 346 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 347 -I$(srctree)/arch/$(hdr-arch)/include \ 348 -include include/linux/autoconf.h 349 350KBUILD_CPPFLAGS := -D__KERNEL__ 351 352KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 353 -fno-strict-aliasing -fno-common \ 354 -Werror-implicit-function-declaration 355KBUILD_AFLAGS := -D__ASSEMBLY__ 356 357# Read KERNELRELEASE from include/config/kernel.release (if it exists) 358KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 359KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 360 361export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 362export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 363export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 364export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 365 366export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 367export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 368export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 369 370# When compiling out-of-tree modules, put MODVERDIR in the module 371# tree rather than in the kernel tree. The kernel tree might 372# even be read-only. 373export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 374 375# Files to ignore in find ... statements 376 377RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 378export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 379 380# =========================================================================== 381# Rules shared between *config targets and build targets 382 383# Basic helpers built in scripts/ 384PHONY += scripts_basic 385scripts_basic: 386 $(Q)$(MAKE) $(build)=scripts/basic 387 388# To avoid any implicit rule to kick in, define an empty command. 389scripts/basic/%: scripts_basic ; 390 391PHONY += outputmakefile 392# outputmakefile generates a Makefile in the output directory, if using a 393# separate output directory. This allows convenient use of make in the 394# output directory. 395outputmakefile: 396ifneq ($(KBUILD_SRC),) 397 $(Q)ln -fsn $(srctree) source 398 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 399 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 400endif 401 402# To make sure we do not include .config for any of the *config targets 403# catch them early, and hand them over to scripts/kconfig/Makefile 404# It is allowed to specify more targets when calling make, including 405# mixing *config targets and build targets. 406# For example 'make oldconfig all'. 407# Detect when mixed targets is specified, and make a second invocation 408# of make so .config is not included in this case either (for *config). 409 410no-dot-config-targets := clean mrproper distclean \ 411 cscope TAGS tags help %docs check% \ 412 include/linux/version.h headers_% \ 413 kernelrelease kernelversion 414 415config-targets := 0 416mixed-targets := 0 417dot-config := 1 418 419ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 420 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 421 dot-config := 0 422 endif 423endif 424 425ifeq ($(KBUILD_EXTMOD),) 426 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 427 config-targets := 1 428 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 429 mixed-targets := 1 430 endif 431 endif 432endif 433 434ifeq ($(mixed-targets),1) 435# =========================================================================== 436# We're called with mixed targets (*config and build targets). 437# Handle them one by one. 438 439%:: FORCE 440 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 441 442else 443ifeq ($(config-targets),1) 444# =========================================================================== 445# *config targets only - make sure prerequisites are updated, and descend 446# in scripts/kconfig to make the *config target 447 448# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 449# KBUILD_DEFCONFIG may point out an alternative default configuration 450# used for 'make defconfig' 451include $(srctree)/arch/$(SRCARCH)/Makefile 452export KBUILD_DEFCONFIG KBUILD_KCONFIG 453 454config: scripts_basic outputmakefile FORCE 455 $(Q)mkdir -p include/linux include/config 456 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 457 458%config: scripts_basic outputmakefile FORCE 459 $(Q)mkdir -p include/linux include/config 460 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 461 462else 463# =========================================================================== 464# Build targets only - this includes vmlinux, arch specific targets, clean 465# targets and others. In general all targets except *config targets. 466 467ifeq ($(KBUILD_EXTMOD),) 468# Additional helpers built in scripts/ 469# Carefully list dependencies so we do not try to build scripts twice 470# in parallel 471PHONY += scripts 472scripts: scripts_basic include/config/auto.conf 473 $(Q)$(MAKE) $(build)=$(@) 474 475# Objects we will link into vmlinux / subdirs we need to visit 476init-y := init/ 477drivers-y := drivers/ sound/ firmware/ 478net-y := net/ 479libs-y := lib/ 480core-y := usr/ 481endif # KBUILD_EXTMOD 482 483ifeq ($(dot-config),1) 484# Read in config 485-include include/config/auto.conf 486 487ifeq ($(KBUILD_EXTMOD),) 488# Read in dependencies to all Kconfig* files, make sure to run 489# oldconfig if changes are detected. 490-include include/config/auto.conf.cmd 491 492# To avoid any implicit rule to kick in, define an empty command 493$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 494 495# If .config is newer than include/config/auto.conf, someone tinkered 496# with it and forgot to run make oldconfig. 497# if auto.conf.cmd is missing then we are probably in a cleaned tree so 498# we execute the config step to be sure to catch updated Kconfig files 499include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 500 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 501else 502# external modules needs include/linux/autoconf.h and include/config/auto.conf 503# but do not care if they are up-to-date. Use auto.conf to trigger the test 504PHONY += include/config/auto.conf 505 506include/config/auto.conf: 507 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 508 echo; \ 509 echo " ERROR: Kernel configuration is invalid."; \ 510 echo " include/linux/autoconf.h or $@ are missing."; \ 511 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 512 echo; \ 513 /bin/false) 514 515endif # KBUILD_EXTMOD 516 517else 518# Dummy target needed, because used as prerequisite 519include/config/auto.conf: ; 520endif # $(dot-config) 521 522# The all: target is the default when no target is given on the 523# command line. 524# This allow a user to issue only 'make' to build a kernel including modules 525# Defaults vmlinux but it is usually overridden in the arch makefile 526all: vmlinux 527 528ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 529KBUILD_CFLAGS += -Os 530else 531KBUILD_CFLAGS += -O2 532endif 533 534include $(srctree)/arch/$(SRCARCH)/Makefile 535 536ifneq ($(CONFIG_FRAME_WARN),0) 537KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 538endif 539 540# Force gcc to behave correct even for buggy distributions 541ifndef CONFIG_CC_STACKPROTECTOR 542KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 543endif 544 545ifdef CONFIG_FRAME_POINTER 546KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 547else 548KBUILD_CFLAGS += -fomit-frame-pointer 549endif 550 551ifdef CONFIG_DEBUG_INFO 552KBUILD_CFLAGS += -g 553KBUILD_AFLAGS += -gdwarf-2 554endif 555 556ifdef CONFIG_FUNCTION_TRACER 557KBUILD_CFLAGS += -pg 558endif 559 560# We trigger additional mismatches with less inlining 561ifdef CONFIG_DEBUG_SECTION_MISMATCH 562KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 563endif 564 565# arch Makefile may override CC so keep this after arch Makefile is included 566NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 567CHECKFLAGS += $(NOSTDINC_FLAGS) 568 569# warn about C99 declaration after statement 570KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 571 572# disable pointer signed / unsigned warnings in gcc 4.0 573KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 574 575# disable invalid "can't wrap" optimizations for signed / pointers 576KBUILD_CFLAGS += $(call cc-option,-fwrapv) 577 578# revert to pre-gcc-4.4 behaviour of .eh_frame 579KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 580 581# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 582# But warn user when we do so 583warn-assign = \ 584$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 585 586ifneq ($(KCPPFLAGS),) 587 $(call warn-assign,CPPFLAGS) 588 KBUILD_CPPFLAGS += $(KCPPFLAGS) 589endif 590ifneq ($(KAFLAGS),) 591 $(call warn-assign,AFLAGS) 592 KBUILD_AFLAGS += $(KAFLAGS) 593endif 594ifneq ($(KCFLAGS),) 595 $(call warn-assign,CFLAGS) 596 KBUILD_CFLAGS += $(KCFLAGS) 597endif 598 599# Use --build-id when available. 600LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 601 $(call ld-option, -Wl$(comma)--build-id,)) 602LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 603LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 604 605ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 606LDFLAGS_vmlinux += -X 607endif 608 609# Default kernel image to build when no specific target is given. 610# KBUILD_IMAGE may be overruled on the command line or 611# set in the environment 612# Also any assignments in arch/$(ARCH)/Makefile take precedence over 613# this default value 614export KBUILD_IMAGE ?= vmlinux 615 616# 617# INSTALL_PATH specifies where to place the updated kernel and system map 618# images. Default is /boot, but you can set it to other values 619export INSTALL_PATH ?= /boot 620 621# 622# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 623# relocations required by build roots. This is not defined in the 624# makefile but the argument can be passed to make if needed. 625# 626 627MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 628export MODLIB 629 630# 631# INSTALL_MOD_STRIP, if defined, will cause modules to be 632# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 633# the default option --strip-debug will be used. Otherwise, 634# INSTALL_MOD_STRIP will used as the options to the strip command. 635 636ifdef INSTALL_MOD_STRIP 637ifeq ($(INSTALL_MOD_STRIP),1) 638mod_strip_cmd = $(STRIP) --strip-debug 639else 640mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 641endif # INSTALL_MOD_STRIP=1 642else 643mod_strip_cmd = true 644endif # INSTALL_MOD_STRIP 645export mod_strip_cmd 646 647 648ifeq ($(KBUILD_EXTMOD),) 649core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 650 651vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 652 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 653 $(net-y) $(net-m) $(libs-y) $(libs-m))) 654 655vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 656 $(init-n) $(init-) \ 657 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 658 $(net-n) $(net-) $(libs-n) $(libs-)))) 659 660init-y := $(patsubst %/, %/built-in.o, $(init-y)) 661core-y := $(patsubst %/, %/built-in.o, $(core-y)) 662drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 663net-y := $(patsubst %/, %/built-in.o, $(net-y)) 664libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 665libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 666libs-y := $(libs-y1) $(libs-y2) 667 668# Build vmlinux 669# --------------------------------------------------------------------------- 670# vmlinux is built from the objects selected by $(vmlinux-init) and 671# $(vmlinux-main). Most are built-in.o files from top-level directories 672# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 673# Ordering when linking is important, and $(vmlinux-init) must be first. 674# 675# vmlinux 676# ^ 677# | 678# +-< $(vmlinux-init) 679# | +--< init/version.o + more 680# | 681# +--< $(vmlinux-main) 682# | +--< driver/built-in.o mm/built-in.o + more 683# | 684# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 685# 686# vmlinux version (uname -v) cannot be updated during normal 687# descending-into-subdirs phase since we do not yet know if we need to 688# update vmlinux. 689# Therefore this step is delayed until just before final link of vmlinux - 690# except in the kallsyms case where it is done just before adding the 691# symbols to the kernel. 692# 693# System.map is generated to document addresses of all kernel symbols 694 695vmlinux-init := $(head-y) $(init-y) 696vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 697vmlinux-all := $(vmlinux-init) $(vmlinux-main) 698vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 699export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 700 701# Rule to link vmlinux - also used during CONFIG_KALLSYMS 702# May be overridden by arch/$(ARCH)/Makefile 703quiet_cmd_vmlinux__ ?= LD $@ 704 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 705 -T $(vmlinux-lds) $(vmlinux-init) \ 706 --start-group $(vmlinux-main) --end-group \ 707 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 708 709# Generate new vmlinux version 710quiet_cmd_vmlinux_version = GEN .version 711 cmd_vmlinux_version = set -e; \ 712 if [ ! -r .version ]; then \ 713 rm -f .version; \ 714 echo 1 >.version; \ 715 else \ 716 mv .version .old_version; \ 717 expr 0$$(cat .old_version) + 1 >.version; \ 718 fi; \ 719 $(MAKE) $(build)=init 720 721# Generate System.map 722quiet_cmd_sysmap = SYSMAP 723 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 724 725# Link of vmlinux 726# If CONFIG_KALLSYMS is set .version is already updated 727# Generate System.map and verify that the content is consistent 728# Use + in front of the vmlinux_version rule to silent warning with make -j2 729# First command is ':' to allow us to use + in front of the rule 730define rule_vmlinux__ 731 : 732 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 733 734 $(call cmd,vmlinux__) 735 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 736 737 $(Q)$(if $($(quiet)cmd_sysmap), \ 738 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 739 $(cmd_sysmap) $@ System.map; \ 740 if [ $$? -ne 0 ]; then \ 741 rm -f $@; \ 742 /bin/false; \ 743 fi; 744 $(verify_kallsyms) 745endef 746 747 748ifdef CONFIG_KALLSYMS 749# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 750# It's a three stage process: 751# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 752# empty 753# Running kallsyms on that gives us .tmp_kallsyms1.o with 754# the right size - vmlinux version (uname -v) is updated during this step 755# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 756# but due to the added section, some addresses have shifted. 757# From here, we generate a correct .tmp_kallsyms2.o 758# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 759# o Verify that the System.map from vmlinux matches the map from 760# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 761# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 762# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 763# temporary bypass to allow the kernel to be built while the 764# maintainers work out what went wrong with kallsyms. 765 766ifdef CONFIG_KALLSYMS_EXTRA_PASS 767last_kallsyms := 3 768else 769last_kallsyms := 2 770endif 771 772kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 773 774define verify_kallsyms 775 $(Q)$(if $($(quiet)cmd_sysmap), \ 776 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 777 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 778 $(Q)cmp -s System.map .tmp_System.map || \ 779 (echo Inconsistent kallsyms data; \ 780 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 781 rm .tmp_kallsyms* ; /bin/false ) 782endef 783 784# Update vmlinux version before link 785# Use + in front of this rule to silent warning about make -j1 786# First command is ':' to allow us to use + in front of this rule 787cmd_ksym_ld = $(cmd_vmlinux__) 788define rule_ksym_ld 789 : 790 +$(call cmd,vmlinux_version) 791 $(call cmd,vmlinux__) 792 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 793endef 794 795# Generate .S file with all kernel symbols 796quiet_cmd_kallsyms = KSYM $@ 797 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 798 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 799 800.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 801 $(call if_changed_dep,as_o_S) 802 803.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 804 $(call cmd,kallsyms) 805 806# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 807.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 808 $(call if_changed_rule,ksym_ld) 809 810.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 811 $(call if_changed,vmlinux__) 812 813.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 814 $(call if_changed,vmlinux__) 815 816# Needs to visit scripts/ before $(KALLSYMS) can be used. 817$(KALLSYMS): scripts ; 818 819# Generate some data for debugging strange kallsyms problems 820debug_kallsyms: .tmp_map$(last_kallsyms) 821 822.tmp_map%: .tmp_vmlinux% FORCE 823 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 824 825.tmp_map3: .tmp_map2 826 827.tmp_map2: .tmp_map1 828 829endif # ifdef CONFIG_KALLSYMS 830 831# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 832# relevant sections renamed as per the linker script. 833quiet_cmd_vmlinux-modpost = LD $@ 834 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 835 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 836 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 837define rule_vmlinux-modpost 838 : 839 +$(call cmd,vmlinux-modpost) 840 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 841 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 842endef 843 844# vmlinux image - including updated kernel symbols 845vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 846ifdef CONFIG_HEADERS_CHECK 847 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 848endif 849ifdef CONFIG_SAMPLES 850 $(Q)$(MAKE) $(build)=samples 851endif 852ifdef CONFIG_BUILD_DOCSRC 853 $(Q)$(MAKE) $(build)=Documentation 854endif 855 $(call vmlinux-modpost) 856 $(call if_changed_rule,vmlinux__) 857 $(Q)rm -f .old_version 858 859# build vmlinux.o first to catch section mismatch errors early 860ifdef CONFIG_KALLSYMS 861.tmp_vmlinux1: vmlinux.o 862endif 863 864modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 865vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 866 $(call if_changed_rule,vmlinux-modpost) 867 868# The actual objects are generated when descending, 869# make sure no implicit rule kicks in 870$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 871 872# Handle descending into subdirectories listed in $(vmlinux-dirs) 873# Preset locale variables to speed up the build process. Limit locale 874# tweaks to this spot to avoid wrong language settings when running 875# make menuconfig etc. 876# Error messages still appears in the original language 877 878PHONY += $(vmlinux-dirs) 879$(vmlinux-dirs): prepare scripts 880 $(Q)$(MAKE) $(build)=$@ 881 882# Build the kernel release string 883# 884# The KERNELRELEASE value built here is stored in the file 885# include/config/kernel.release, and is used when executing several 886# make targets, such as "make install" or "make modules_install." 887# 888# The eventual kernel release string consists of the following fields, 889# shown in a hierarchical format to show how smaller parts are concatenated 890# to form the larger and final value, with values coming from places like 891# the Makefile, kernel config options, make command line options and/or 892# SCM tag information. 893# 894# $(KERNELVERSION) 895# $(VERSION) eg, 2 896# $(PATCHLEVEL) eg, 6 897# $(SUBLEVEL) eg, 18 898# $(EXTRAVERSION) eg, -rc6 899# $(localver-full) 900# $(localver) 901# localversion* (files without backups, containing '~') 902# $(CONFIG_LOCALVERSION) (from kernel config setting) 903# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 904# ./scripts/setlocalversion (SCM tag, if one exists) 905# $(LOCALVERSION) (from make command line if provided) 906# 907# Note how the final $(localver-auto) string is included *only* if the 908# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 909# moment, only git is supported but other SCMs can edit the script 910# scripts/setlocalversion and add the appropriate checks as needed. 911 912pattern = ".*/localversion[^~]*" 913string = $(shell cat /dev/null \ 914 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 915 916localver = $(subst $(space),, $(string) \ 917 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 918 919# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 920# and if the SCM is know a tag from the SCM is appended. 921# The appended tag is determined by the SCM used. 922# 923# .scmversion is used when generating rpm packages so we do not loose 924# the version information from the SCM when we do the build of the kernel 925# from the copied source 926ifdef CONFIG_LOCALVERSION_AUTO 927 928ifeq ($(wildcard .scmversion),) 929 _localver-auto = $(shell $(CONFIG_SHELL) \ 930 $(srctree)/scripts/setlocalversion $(srctree)) 931else 932 _localver-auto = $(shell cat .scmversion 2> /dev/null) 933endif 934 935 localver-auto = $(LOCALVERSION)$(_localver-auto) 936endif 937 938localver-full = $(localver)$(localver-auto) 939 940# Store (new) KERNELRELASE string in include/config/kernel.release 941kernelrelease = $(KERNELVERSION)$(localver-full) 942include/config/kernel.release: include/config/auto.conf FORCE 943 $(Q)rm -f $@ 944 $(Q)echo $(kernelrelease) > $@ 945 946 947# Things we need to do before we recursively start building the kernel 948# or the modules are listed in "prepare". 949# A multi level approach is used. prepareN is processed before prepareN-1. 950# archprepare is used in arch Makefiles and when processed asm symlink, 951# version.h and scripts_basic is processed / created. 952 953# Listed in dependency order 954PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 955 956# prepare3 is used to check if we are building in a separate output directory, 957# and if so do: 958# 1) Check that make has not been executed in the kernel src $(srctree) 959# 2) Create the include2 directory, used for the second asm symlink 960prepare3: include/config/kernel.release 961ifneq ($(KBUILD_SRC),) 962 @$(kecho) ' Using $(srctree) as source for kernel' 963 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 964 echo " $(srctree) is not clean, please run 'make mrproper'";\ 965 echo " in the '$(srctree)' directory.";\ 966 /bin/false; \ 967 fi; 968 $(Q)if [ ! -d include2 ]; then \ 969 mkdir -p include2; \ 970 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 971 fi 972endif 973 974# prepare2 creates a makefile if using a separate output directory 975prepare2: prepare3 outputmakefile 976 977prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 978 include/asm include/config/auto.conf 979 $(cmd_crmodverdir) 980 981archprepare: prepare1 scripts_basic 982 983prepare0: archprepare FORCE 984 $(Q)$(MAKE) $(build)=. 985 $(Q)$(MAKE) $(build)=. missing-syscalls 986 987# All the preparing.. 988prepare: prepare0 989 990# Leave this as default for preprocessing vmlinux.lds.S, which is now 991# done in arch/$(ARCH)/kernel/Makefile 992 993export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 994 995# The asm symlink changes when $(ARCH) changes. 996# Detect this and ask user to run make mrproper 997# If asm is a stale symlink (point to dir that does not exist) remove it 998define check-symlink 999 set -e; \ 1000 if [ -L include/asm ]; then \
1001 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 1002 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 1003 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 1004 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 1005 exit 1; \ 1006 fi; \ 1007 test -e $$asmlink || rm include/asm; \ 1008 elif [ -d include/asm ]; then \ 1009 echo "ERROR: $@ is a directory but a symlink was expected";\ 1010 exit 1; \ 1011 fi 1012endef 1013 1014# We create the target directory of the symlink if it does 1015# not exist so the test in check-symlink works and we have a 1016# directory for generated filesas used by some architectures. 1017define create-symlink 1018 if [ ! -L include/asm ]; then \ 1019 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 1020 if [ ! -d include/asm-$(SRCARCH) ]; then \ 1021 mkdir -p include/asm-$(SRCARCH); \ 1022 fi; \ 1023 ln -fsn asm-$(SRCARCH) $@; \ 1024 fi 1025endef 1026 1027include/asm: FORCE 1028 $(Q)$(check-symlink) 1029 $(Q)$(create-symlink) 1030 1031# Generate some files 1032# --------------------------------------------------------------------------- 1033 1034# KERNELRELEASE can change from a few different places, meaning version.h 1035# needs to be updated, so this check is forced on all builds 1036 1037uts_len := 64 1038define filechk_utsrelease.h 1039 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1040 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1041 exit 1; \ 1042 fi; \ 1043 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1044endef 1045 1046define filechk_version.h 1047 (echo \#define LINUX_VERSION_CODE $(shell \ 1048 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1049 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1050endef 1051 1052include/linux/version.h: $(srctree)/Makefile FORCE 1053 $(call filechk,version.h) 1054 1055include/linux/utsrelease.h: include/config/kernel.release FORCE 1056 $(call filechk,utsrelease.h) 1057 1058PHONY += headerdep 1059headerdep: 1060 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 1061 1062# --------------------------------------------------------------------------- 1063 1064PHONY += depend dep 1065depend dep: 1066 @echo '*** Warning: make $@ is unnecessary now.' 1067 1068# --------------------------------------------------------------------------- 1069# Firmware install 1070INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1071export INSTALL_FW_PATH 1072 1073PHONY += firmware_install 1074firmware_install: FORCE 1075 @mkdir -p $(objtree)/firmware 1076 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1077 1078# --------------------------------------------------------------------------- 1079# Kernel headers 1080 1081#Default location for installed headers 1082export INSTALL_HDR_PATH = $(objtree)/usr 1083 1084hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1085# Find out where the Kbuild file is located to support 1086# arch/$(ARCH)/include/asm 1087hdr-dir = $(strip \ 1088 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1089 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1090 1091# If we do an all arch process set dst to asm-$(hdr-arch) 1092hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1093 1094PHONY += __headers 1095__headers: include/linux/version.h scripts_basic FORCE 1096 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1097 1098PHONY += headers_install_all 1099headers_install_all: 1100 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1101 1102PHONY += headers_install 1103headers_install: __headers 1104 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1105 $(error Headers not exportable for the $(SRCARCH) architecture)) 1106 $(Q)$(MAKE) $(hdr-inst)=include 1107 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1108 1109PHONY += headers_check_all 1110headers_check_all: headers_install_all 1111 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1112 1113PHONY += headers_check 1114headers_check: headers_install 1115 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1116 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1117 1118# --------------------------------------------------------------------------- 1119# Modules 1120 1121ifdef CONFIG_MODULES 1122 1123# By default, build modules as well 1124 1125all: modules 1126 1127# Build modules 1128# 1129# A module can be listed more than once in obj-m resulting in 1130# duplicate lines in modules.order files. Those are removed 1131# using awk while concatenating to the final file. 1132 1133PHONY += modules 1134modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1135 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1136 @$(kecho) ' Building modules, stage 2.'; 1137 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1138 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1139 1140 1141# Target to prepare building external modules 1142PHONY += modules_prepare 1143modules_prepare: prepare scripts 1144 1145# Target to install modules 1146PHONY += modules_install 1147modules_install: _modinst_ _modinst_post 1148 1149PHONY += _modinst_ 1150_modinst_: 1151 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1152 echo "Warning: you may need to install module-init-tools"; \ 1153 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1154 sleep 1; \ 1155 fi 1156 @rm -rf $(MODLIB)/kernel 1157 @rm -f $(MODLIB)/source 1158 @mkdir -p $(MODLIB)/kernel 1159 @ln -s $(srctree) $(MODLIB)/source 1160 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1161 rm -f $(MODLIB)/build ; \ 1162 ln -s $(objtree) $(MODLIB)/build ; \ 1163 fi 1164 @cp -f $(objtree)/modules.order $(MODLIB)/ 1165 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1166 1167# This depmod is only for convenience to give the initial 1168# boot a modules.dep even before / is mounted read-write. However the 1169# boot script depmod is the master version. 1170PHONY += _modinst_post 1171_modinst_post: _modinst_ 1172 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1173 $(call cmd,depmod) 1174 1175else # CONFIG_MODULES 1176 1177# Modules not configured 1178# --------------------------------------------------------------------------- 1179 1180modules modules_install: FORCE 1181 @echo 1182 @echo "The present kernel configuration has modules disabled." 1183 @echo "Type 'make config' and enable loadable module support." 1184 @echo "Then build a kernel with module support enabled." 1185 @echo 1186 @exit 1 1187 1188endif # CONFIG_MODULES 1189 1190### 1191# Cleaning is done on three levels. 1192# make clean Delete most generated files 1193# Leave enough to build external modules 1194# make mrproper Delete the current configuration, and all generated files 1195# make distclean Remove editor backup files, patch leftover files and the like 1196 1197# Directories & files removed with 'make clean' 1198CLEAN_DIRS += $(MODVERDIR) 1199CLEAN_FILES += vmlinux System.map \ 1200 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1201 1202# Directories & files removed with 'make mrproper' 1203MRPROPER_DIRS += include/config include2 usr/include include/generated 1204MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1205 include/linux/autoconf.h include/linux/version.h \ 1206 include/linux/utsrelease.h \ 1207 include/linux/bounds.h include/asm*/asm-offsets.h \ 1208 Module.symvers Module.markers tags TAGS cscope* 1209 1210# clean - Delete most, but leave enough to build external modules 1211# 1212clean: rm-dirs := $(CLEAN_DIRS) 1213clean: rm-files := $(CLEAN_FILES) 1214clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1215 1216PHONY += $(clean-dirs) clean archclean 1217$(clean-dirs): 1218 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1219 1220clean: archclean $(clean-dirs) 1221 $(call cmd,rmdirs) 1222 $(call cmd,rmfiles) 1223 @find . $(RCS_FIND_IGNORE) \ 1224 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1225 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1226 -o -name '*.symtypes' -o -name 'modules.order' \ 1227 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \ 1228 -type f -print | xargs rm -f 1229 1230# mrproper - Delete all generated files, including .config 1231# 1232mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1233mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1234mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1235 1236PHONY += $(mrproper-dirs) mrproper archmrproper 1237$(mrproper-dirs): 1238 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1239 1240mrproper: clean archmrproper $(mrproper-dirs) 1241 $(call cmd,rmdirs) 1242 $(call cmd,rmfiles) 1243 1244# distclean 1245# 1246PHONY += distclean 1247 1248distclean: mrproper 1249 @find $(srctree) $(RCS_FIND_IGNORE) \ 1250 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1251 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1252 -o -name '.*.rej' -o -size 0 \ 1253 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1254 -type f -print | xargs rm -f 1255 1256 1257# Packaging of the kernel to various formats 1258# --------------------------------------------------------------------------- 1259# rpm target kept for backward compatibility 1260package-dir := $(srctree)/scripts/package 1261 1262%pkg: include/config/kernel.release FORCE 1263 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1264rpm: include/config/kernel.release FORCE 1265 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1266 1267 1268# Brief documentation of the typical targets used 1269# --------------------------------------------------------------------------- 1270 1271boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1272boards := $(notdir $(boards)) 1273board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1274board-dirs := $(sort $(notdir $(board-dirs:/=))) 1275 1276help: 1277 @echo 'Cleaning targets:' 1278 @echo ' clean - Remove most generated files but keep the config and' 1279 @echo ' enough build support to build external modules' 1280 @echo ' mrproper - Remove all generated files + config + various backup files' 1281 @echo ' distclean - mrproper + remove editor backup and patch files' 1282 @echo '' 1283 @echo 'Configuration targets:' 1284 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1285 @echo '' 1286 @echo 'Other generic targets:' 1287 @echo ' all - Build all targets marked with [*]' 1288 @echo '* vmlinux - Build the bare kernel' 1289 @echo '* modules - Build all modules' 1290 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1291 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1292 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1293 @echo ' dir/ - Build all files in dir and below' 1294 @echo ' dir/file.[ois] - Build specified target only' 1295 @echo ' dir/file.ko - Build module including final link' 1296 @echo ' modules_prepare - Set up for building external modules' 1297 @echo ' tags/TAGS - Generate tags file for editors' 1298 @echo ' cscope - Generate cscope index' 1299 @echo ' kernelrelease - Output the release version string' 1300 @echo ' kernelversion - Output the version stored in Makefile' 1301 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1302 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1303 echo '' 1304 @echo 'Static analysers' 1305 @echo ' checkstack - Generate a list of stack hogs' 1306 @echo ' namespacecheck - Name space analysis on compiled kernel' 1307 @echo ' versioncheck - Sanity check on version.h usage' 1308 @echo ' includecheck - Check for duplicate included header files' 1309 @echo ' export_report - List the usages of all exported symbols' 1310 @echo ' headers_check - Sanity check on exported headers' 1311 @echo ' headerdep - Detect inclusion cycles in headers'; \ 1312 echo '' 1313 @echo 'Kernel packaging:' 1314 @$(MAKE) $(build)=$(package-dir) help 1315 @echo '' 1316 @echo 'Documentation targets:' 1317 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1318 @echo '' 1319 @echo 'Architecture specific targets ($(SRCARCH)):' 1320 @$(if $(archhelp),$(archhelp),\ 1321 echo ' No architecture specific help defined for $(SRCARCH)') 1322 @echo '' 1323 @$(if $(boards), \ 1324 $(foreach b, $(boards), \ 1325 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1326 echo '') 1327 @$(if $(board-dirs), \ 1328 $(foreach b, $(board-dirs), \ 1329 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1330 printf " %-16s - Show all of the above\\n" help-boards; \ 1331 echo '') 1332 1333 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1334 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1335 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1336 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1337 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1338 @echo '' 1339 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1340 @echo 'For further info see the ./README file' 1341 1342 1343help-board-dirs := $(addprefix help-,$(board-dirs)) 1344 1345help-boards: $(help-board-dirs) 1346 1347boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1348 1349$(help-board-dirs): help-%: 1350 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1351 @$(if $(boards-per-dir), \ 1352 $(foreach b, $(boards-per-dir), \ 1353 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1354 echo '') 1355 1356 1357# Documentation targets 1358# --------------------------------------------------------------------------- 1359%docs: scripts_basic FORCE 1360 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1361 1362else # KBUILD_EXTMOD 1363 1364### 1365# External module support. 1366# When building external modules the kernel used as basis is considered 1367# read-only, and no consistency checks are made and the make 1368# system is not used on the basis kernel. If updates are required 1369# in the basis kernel ordinary make commands (without M=...) must 1370# be used. 1371# 1372# The following are the only valid targets when building external 1373# modules. 1374# make M=dir clean Delete all automatically generated files 1375# make M=dir modules Make all modules in specified dir 1376# make M=dir Same as 'make M=dir modules' 1377# make M=dir modules_install 1378# Install the modules built in the module directory 1379# Assumes install directory is already created 1380 1381# We are always building modules 1382KBUILD_MODULES := 1 1383PHONY += crmodverdir 1384crmodverdir: 1385 $(cmd_crmodverdir) 1386 1387PHONY += $(objtree)/Module.symvers 1388$(objtree)/Module.symvers: 1389 @test -e $(objtree)/Module.symvers || ( \ 1390 echo; \ 1391 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1392 echo " is missing; modules will have no dependencies and modversions."; \ 1393 echo ) 1394 1395module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1396PHONY += $(module-dirs) modules 1397$(module-dirs): crmodverdir $(objtree)/Module.symvers 1398 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1399 1400modules: $(module-dirs) 1401 @$(kecho) ' Building modules, stage 2.'; 1402 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1403 1404PHONY += modules_install 1405modules_install: _emodinst_ _emodinst_post 1406 1407install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1408PHONY += _emodinst_ 1409_emodinst_: 1410 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1411 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1412 1413PHONY += _emodinst_post 1414_emodinst_post: _emodinst_ 1415 $(call cmd,depmod) 1416 1417clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1418 1419PHONY += $(clean-dirs) clean 1420$(clean-dirs): 1421 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1422 1423clean: rm-dirs := $(MODVERDIR) 1424clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ 1425 $(KBUILD_EXTMOD)/Module.markers \ 1426 $(KBUILD_EXTMOD)/modules.order 1427clean: $(clean-dirs) 1428 $(call cmd,rmdirs) 1429 $(call cmd,rmfiles) 1430 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1431 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1432 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1433 -type f -print | xargs rm -f 1434 1435help: 1436 @echo ' Building external modules.' 1437 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1438 @echo '' 1439 @echo ' modules - default target, build the module(s)' 1440 @echo ' modules_install - install the module' 1441 @echo ' clean - remove generated files in module directory only' 1442 @echo '' 1443 1444# Dummies... 1445PHONY += prepare scripts 1446prepare: ; 1447scripts: ; 1448endif # KBUILD_EXTMOD 1449 1450# Generate tags for editors 1451# --------------------------------------------------------------------------- 1452quiet_cmd_tags = GEN $@ 1453 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1454 1455tags TAGS cscope: FORCE 1456 $(call cmd,tags) 1457 1458# Scripts to check various things for consistency 1459# --------------------------------------------------------------------------- 1460 1461includecheck: 1462 find * $(RCS_FIND_IGNORE) \ 1463 -name '*.[hcS]' -type f -print | sort \ 1464 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1465 1466versioncheck: 1467 find * $(RCS_FIND_IGNORE) \ 1468 -name '*.[hcS]' -type f -print | sort \ 1469 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1470 1471namespacecheck: 1472 $(PERL) $(srctree)/scripts/namespace.pl 1473 1474export_report: 1475 $(PERL) $(srctree)/scripts/export_report.pl 1476 1477endif #ifeq ($(config-targets),1) 1478endif #ifeq ($(mixed-targets),1) 1479 1480PHONY += checkstack kernelrelease kernelversion 1481 1482# UML needs a little special treatment here. It wants to use the host 1483# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1484# else wants $(ARCH), including people doing cross-builds, which means 1485# that $(SUBARCH) doesn't work here. 1486ifeq ($(ARCH), um) 1487CHECKSTACK_ARCH := $(SUBARCH) 1488else 1489CHECKSTACK_ARCH := $(ARCH) 1490endif 1491checkstack: 1492 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1493 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1494 1495kernelrelease: 1496 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1497 $(error kernelrelease not valid - run 'make prepare' to update it)) 1498kernelversion: 1499 @echo $(KERNELVERSION) 1500 1501# Single targets 1502# --------------------------------------------------------------------------- 1503# Single targets are compatible with: 1504# - build with mixed source and output 1505# - build with separate output dir 'make O=...' 1506# - external modules 1507# 1508# target-dir => where to store outputfile 1509# build-dir => directory in kernel source tree to use 1510 1511ifeq ($(KBUILD_EXTMOD),) 1512 build-dir = $(patsubst %/,%,$(dir $@)) 1513 target-dir = $(dir $@) 1514else 1515 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1516 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1517 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1518endif 1519 1520%.s: %.c prepare scripts FORCE 1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1522%.i: %.c prepare scripts FORCE 1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1524%.o: %.c prepare scripts FORCE 1525 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1526%.lst: %.c prepare scripts FORCE 1527 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1528%.s: %.S prepare scripts FORCE 1529 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1530%.o: %.S prepare scripts FORCE 1531 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1532%.symtypes: %.c prepare scripts FORCE 1533 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1534 1535# Modules 1536/: prepare scripts FORCE 1537 $(cmd_crmodverdir) 1538 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1539 $(build)=$(build-dir) 1540%/: prepare scripts FORCE 1541 $(cmd_crmodverdir) 1542 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1543 $(build)=$(build-dir) 1544%.ko: prepare scripts FORCE 1545 $(cmd_crmodverdir) 1546 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1547 $(build)=$(build-dir) $(@:.ko=.o) 1548 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1549 1550# FIXME Should go into a make.lib or something 1551# =========================================================================== 1552 1553quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1554 cmd_rmdirs = rm -rf $(rm-dirs) 1555 1556quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1557 cmd_rmfiles = rm -f $(rm-files) 1558 1559# Run depmod only if we have System.map and depmod is executable 1560quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1561 cmd_depmod = \ 1562 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1563 $(DEPMOD) -ae -F System.map \ 1564 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1565 $(KERNELRELEASE); \ 1566 fi 1567 1568# Create temporary dir for module support files 1569# clean it up only when building all modules 1570cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1571 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1572 1573a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1574 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1575 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1576 1577quiet_cmd_as_o_S = AS $@ 1578cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1579 1580# read all saved command lines 1581 1582targets := $(wildcard $(sort $(targets))) 1583cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1584 1585ifneq ($(cmd_files),) 1586 $(cmd_files): ; # Do not try to update included dependency files 1587 include $(cmd_files) 1588endif 1589 1590# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1591# Usage: 1592# $(Q)$(MAKE) $(clean)=dir 1593clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1594 1595endif # skip-makefile 1596 1597PHONY += FORCE 1598FORCE: 1599 1600# Declare the contents of the .PHONY variable as phony. We keep that 1601# information in a variable so we can use it in if_changed and friends. 1602.PHONY: $(PHONY) 1603