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