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