1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 32 4EXTRAVERSION = -rc3 5NAME = Man-Eating Seals of Antiquity 6 7# *DOCUMENTATION* 8# To see a list of typical targets execute "make help" 9# More info can be located in ./README 10# Comments in this file are targeted only to the developer, do not 11# expect to learn how to build the kernel reading this file. 12 13# Do not: 14# o use make's built-in rules and variables 15# (this increases performance and avoids hard-to-debug behaviour); 16# o print "Entering directory ..."; 17MAKEFLAGS += -rR --no-print-directory 18 19# We are using a recursive build, so we need to do a little thinking 20# to get the ordering right. 21# 22# Most importantly: sub-Makefiles should only ever modify files in 23# their own directory. If in some directory we have a dependency on 24# a file in another dir (which doesn't happen often, but it's often 25# unavoidable when linking the built-in.o targets which finally 26# turn into vmlinux), we will call a sub make in that other dir, and 27# after that we are sure that everything which is in that other dir 28# is now up to date. 29# 30# The only cases where we need to modify files which have global 31# effects are thus separated out and done before the recursive 32# descending is started. They are now explicitly listed as the 33# prepare rule. 34 35# To put more focus on warnings, be less verbose as default 36# Use 'make V=1' to see the full commands 37 38ifeq ("$(origin V)", "command line") 39 KBUILD_VERBOSE = $(V) 40endif 41ifndef KBUILD_VERBOSE 42 KBUILD_VERBOSE = 0 43endif 44 45# Call a source code checker (by default, "sparse") as part of the 46# C compilation. 47# 48# Use 'make C=1' to enable checking of only re-compiled files. 49# Use 'make C=2' to enable checking of *all* source files, regardless 50# of whether they are re-compiled or not. 51# 52# See the file "Documentation/sparse.txt" for more details, including 53# where to get the "sparse" utility. 54 55ifeq ("$(origin C)", "command line") 56 KBUILD_CHECKSRC = $(C) 57endif 58ifndef KBUILD_CHECKSRC 59 KBUILD_CHECKSRC = 0 60endif 61 62# Use make M=dir to specify directory of external module to build 63# Old syntax make ... SUBDIRS=$PWD is still supported 64# Setting the environment variable KBUILD_EXTMOD take precedence 65ifdef SUBDIRS 66 KBUILD_EXTMOD ?= $(SUBDIRS) 67endif 68 69ifeq ("$(origin M)", "command line") 70 KBUILD_EXTMOD := $(M) 71endif 72 73# kbuild supports saving output files in a separate directory. 74# To locate output files in a separate directory two syntaxes are supported. 75# In both cases the working directory must be the root of the kernel src. 76# 1) O= 77# Use "make O=dir/to/store/output/files/" 78# 79# 2) Set KBUILD_OUTPUT 80# Set the environment variable KBUILD_OUTPUT to point to the directory 81# where the output files shall be placed. 82# export KBUILD_OUTPUT=dir/to/store/output/files/ 83# make 84# 85# The O= assignment takes precedence over the KBUILD_OUTPUT environment 86# variable. 87 88 89# KBUILD_SRC is set on invocation of make in OBJ directory 90# KBUILD_SRC is not intended to be used by the regular user (for now) 91ifeq ($(KBUILD_SRC),) 92 93# OK, Make called in directory where kernel src resides 94# Do we want to locate output files in a separate directory? 95ifeq ("$(origin O)", "command line") 96 KBUILD_OUTPUT := $(O) 97endif 98 99# That's our default target when none is given on the command line 100PHONY := _all 101_all: 102 103# Cancel implicit rules on top Makefile 104$(CURDIR)/Makefile Makefile: ; 105 106ifneq ($(KBUILD_OUTPUT),) 107# Invoke a second make in the output directory, passing relevant variables 108# check that the output directory actually exists 109saved-output := $(KBUILD_OUTPUT) 110KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 111$(if $(KBUILD_OUTPUT),, \ 112 $(error output directory "$(saved-output)" does not exist)) 113 114PHONY += $(MAKECMDGOALS) sub-make 115 116$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make 117 $(Q)@: 118 119sub-make: FORCE 120 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 121 KBUILD_SRC=$(CURDIR) \ 122 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 123 $(filter-out _all sub-make,$(MAKECMDGOALS)) 124 125# Leave processing to above invocation of make 126skip-makefile := 1 127endif # ifneq ($(KBUILD_OUTPUT),) 128endif # ifeq ($(KBUILD_SRC),) 129 130# We process the rest of the Makefile if this is the final invocation of make 131ifeq ($(skip-makefile),) 132 133# If building an external module we do not care about the all: rule 134# but instead _all depend on modules 135PHONY += all 136ifeq ($(KBUILD_EXTMOD),) 137_all: all 138else 139_all: modules 140endif 141 142srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 143objtree := $(CURDIR) 144src := $(srctree) 145obj := $(objtree) 146 147VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 148 149export srctree objtree VPATH 150 151 152# SUBARCH tells the usermode build what the underlying arch is. That is set 153# first, and if a usermode build is happening, the "ARCH=um" on the command 154# line overrides the setting of ARCH below. If a native build is happening, 155# then ARCH is assigned, getting whatever value it gets normally, and 156# SUBARCH is subsequently ignored. 157 158SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 159 -e s/arm.*/arm/ -e s/sa110/arm/ \ 160 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 161 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 162 -e s/sh[234].*/sh/ ) 163 164# Cross compiling and selecting different set of gcc/bin-utils 165# --------------------------------------------------------------------------- 166# 167# When performing cross compilation for other architectures ARCH shall be set 168# to the target architecture. (See arch/* for the possibilities). 169# ARCH can be set during invocation of make: 170# make ARCH=ia64 171# Another way is to have ARCH set in the environment. 172# The default ARCH is the host where make is executed. 173 174# CROSS_COMPILE specify the prefix used for all executables used 175# during compilation. Only gcc and related bin-utils executables 176# are prefixed with $(CROSS_COMPILE). 177# CROSS_COMPILE can be set on the command line 178# make CROSS_COMPILE=ia64-linux- 179# Alternatively CROSS_COMPILE can be set in the environment. 180# Default value for CROSS_COMPILE is not to prefix executables 181# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 182# 183# To force ARCH and CROSS_COMPILE settings include kernel.* files 184# in the kernel tree - do not patch this file. 185export KBUILD_BUILDHOST := $(SUBARCH) 186 187# Kbuild save the ARCH and CROSS_COMPILE setting in kernel.* files. 188# Restore these settings and check that user did not specify 189# conflicting values. 190 191saved_arch := $(shell cat include/generated/kernel.arch 2> /dev/null) 192saved_cross := $(shell cat include/generated/kernel.cross 2> /dev/null) 193 194ifneq ($(CROSS_COMPILE),) 195 ifneq ($(saved_cross),) 196 ifneq ($(CROSS_COMPILE),$(saved_cross)) 197 $(error CROSS_COMPILE changed from \ 198 "$(saved_cross)" to \ 199 to "$(CROSS_COMPILE)". \ 200 Use "make mrproper" to fix it up) 201 endif 202 endif 203else 204 CROSS_COMPILE := $(saved_cross) 205endif 206 207ifneq ($(ARCH),) 208 ifneq ($(saved_arch),) 209 ifneq ($(saved_arch),$(ARCH)) 210 $(error ARCH changed from \ 211 "$(saved_arch)" to "$(ARCH)". \ 212 Use "make mrproper" to fix it up) 213 endif 214 endif 215else 216 ifneq ($(saved_arch),) 217 ARCH := $(saved_arch) 218 else 219 ARCH := $(SUBARCH) 220 endif 221endif 222 223# Architecture as present in compile.h 224UTS_MACHINE := $(ARCH) 225SRCARCH := $(ARCH) 226 227# Additional ARCH settings for x86 228ifeq ($(ARCH),i386) 229 SRCARCH := x86 230endif 231ifeq ($(ARCH),x86_64) 232 SRCARCH := x86 233endif 234 235# Additional ARCH settings for sparc 236ifeq ($(ARCH),sparc64) 237 SRCARCH := sparc 238endif 239 240# Additional ARCH settings for sh 241ifeq ($(ARCH),sh64) 242 SRCARCH := sh 243endif 244 245# Where to locate arch specific headers 246hdr-arch := $(SRCARCH) 247 248ifeq ($(ARCH),m68knommu) 249 hdr-arch := m68k 250endif 251 252KCONFIG_CONFIG ?= .config 253 254# SHELL used by kbuild 255CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 256 else if [ -x /bin/bash ]; then echo /bin/bash; \ 257 else echo sh; fi ; fi) 258 259HOSTCC = gcc 260HOSTCXX = g++ 261HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 262HOSTCXXFLAGS = -O2 263 264# Decide whether to build built-in, modular, or both. 265# Normally, just do built-in. 266 267KBUILD_MODULES := 268KBUILD_BUILTIN := 1 269 270# If we have only "make modules", don't compile built-in objects. 271# When we're building modules with modversions, we need to consider 272# the built-in objects during the descend as well, in order to 273# make sure the checksums are up to date before we record them. 274 275ifeq ($(MAKECMDGOALS),modules) 276 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 277endif 278 279# If we have "make <whatever> modules", compile modules 280# in addition to whatever we do anyway. 281# Just "make" or "make all" shall build modules as well 282 283ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 284 KBUILD_MODULES := 1 285endif 286 287ifeq ($(MAKECMDGOALS),) 288 KBUILD_MODULES := 1 289endif 290 291export KBUILD_MODULES KBUILD_BUILTIN 292export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 293 294# Beautify output 295# --------------------------------------------------------------------------- 296# 297# Normally, we echo the whole command before executing it. By making 298# that echo $($(quiet)$(cmd)), we now have the possibility to set 299# $(quiet) to choose other forms of output instead, e.g. 300# 301# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 302# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 303# 304# If $(quiet) is empty, the whole command will be printed. 305# If it is set to "quiet_", only the short version will be printed. 306# If it is set to "silent_", nothing will be printed at all, since 307# the variable $(silent_cmd_cc_o_c) doesn't exist. 308# 309# A simple variant is to prefix commands with $(Q) - that's useful 310# for commands that shall be hidden in non-verbose mode. 311# 312# $(Q)ln $@ :< 313# 314# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 315# If KBUILD_VERBOSE equals 1 then the above command is displayed. 316 317ifeq ($(KBUILD_VERBOSE),1) 318 quiet = 319 Q = 320else 321 quiet=quiet_ 322 Q = @ 323endif 324 325# If the user is running make -s (silent mode), suppress echoing of 326# commands 327 328ifneq ($(findstring s,$(MAKEFLAGS)),) 329 quiet=silent_ 330endif 331 332export quiet Q KBUILD_VERBOSE 333 334 335# Look for make include files relative to root of kernel src 336MAKEFLAGS += --include-dir=$(srctree) 337 338# We need some generic definitions (do not try to remake the file). 339$(srctree)/scripts/Kbuild.include: ; 340include $(srctree)/scripts/Kbuild.include 341 342# Make variables (CC, etc...) 343 344AS = $(CROSS_COMPILE)as 345LD = $(CROSS_COMPILE)ld 346CC = $(CROSS_COMPILE)gcc 347CPP = $(CC) -E 348AR = $(CROSS_COMPILE)ar 349NM = $(CROSS_COMPILE)nm 350STRIP = $(CROSS_COMPILE)strip 351OBJCOPY = $(CROSS_COMPILE)objcopy 352OBJDUMP = $(CROSS_COMPILE)objdump 353AWK = awk 354GENKSYMS = scripts/genksyms/genksyms 355INSTALLKERNEL := installkernel 356DEPMOD = /sbin/depmod 357KALLSYMS = scripts/kallsyms 358PERL = perl 359CHECK = sparse 360 361CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 362 -Wbitwise -Wno-return-void $(CF) 363MODFLAGS = -DMODULE 364CFLAGS_MODULE = $(MODFLAGS) 365AFLAGS_MODULE = $(MODFLAGS) 366LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds 367CFLAGS_KERNEL = 368AFLAGS_KERNEL = 369CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 370 371 372# Use LINUXINCLUDE when you must reference the include/ directory. 373# Needed to be compatible with the O= option 374LINUXINCLUDE := -Iinclude \ 375 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 376 -I$(srctree)/arch/$(hdr-arch)/include \ 377 -include include/linux/autoconf.h 378 379KBUILD_CPPFLAGS := -D__KERNEL__ 380 381KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 382 -fno-strict-aliasing -fno-common \ 383 -Werror-implicit-function-declaration \ 384 -Wno-format-security \ 385 -fno-delete-null-pointer-checks 386KBUILD_AFLAGS := -D__ASSEMBLY__ 387 388# Read KERNELRELEASE from include/config/kernel.release (if it exists) 389KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 390KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 391 392export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 393export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 394export CPP AR NM STRIP OBJCOPY OBJDUMP 395export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 396export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 397 398export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 399export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 400export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 401 402# When compiling out-of-tree modules, put MODVERDIR in the module 403# tree rather than in the kernel tree. The kernel tree might 404# even be read-only. 405export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 406 407# Files to ignore in find ... statements 408 409RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 410export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 411 412# =========================================================================== 413# Rules shared between *config targets and build targets 414 415# Basic helpers built in scripts/ 416PHONY += scripts_basic 417scripts_basic: 418 $(Q)$(MAKE) $(build)=scripts/basic 419 420# To avoid any implicit rule to kick in, define an empty command. 421scripts/basic/%: scripts_basic ; 422 423PHONY += outputmakefile 424# outputmakefile generates a Makefile in the output directory, if using a 425# separate output directory. This allows convenient use of make in the 426# output directory. 427outputmakefile: 428ifneq ($(KBUILD_SRC),) 429 $(Q)ln -fsn $(srctree) source 430 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 431 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 432endif 433 434# To make sure we do not include .config for any of the *config targets 435# catch them early, and hand them over to scripts/kconfig/Makefile 436# It is allowed to specify more targets when calling make, including 437# mixing *config targets and build targets. 438# For example 'make oldconfig all'. 439# Detect when mixed targets is specified, and make a second invocation 440# of make so .config is not included in this case either (for *config). 441 442no-dot-config-targets := clean mrproper distclean \ 443 cscope TAGS tags help %docs check% \ 444 include/linux/version.h headers_% \ 445 kernelrelease kernelversion 446 447config-targets := 0 448mixed-targets := 0 449dot-config := 1 450 451ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 452 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 453 dot-config := 0 454 endif 455endif 456 457ifeq ($(KBUILD_EXTMOD),) 458 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 459 config-targets := 1 460 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 461 mixed-targets := 1 462 endif 463 endif 464endif 465 466ifeq ($(mixed-targets),1) 467# =========================================================================== 468# We're called with mixed targets (*config and build targets). 469# Handle them one by one. 470 471%:: FORCE 472 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 473 474else 475ifeq ($(config-targets),1) 476# =========================================================================== 477# *config targets only - make sure prerequisites are updated, and descend 478# in scripts/kconfig to make the *config target 479 480# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 481# KBUILD_DEFCONFIG may point out an alternative default configuration 482# used for 'make defconfig' 483include $(srctree)/arch/$(SRCARCH)/Makefile 484export KBUILD_DEFCONFIG KBUILD_KCONFIG 485 486# save ARCH & CROSS_COMPILE settings 487$(shell mkdir -p include/generated && \ 488 echo $(ARCH) > include/generated/kernel.arch && \ 489 echo $(CROSS_COMPILE) > include/generated/kernel.cross) 490 491config: scripts_basic outputmakefile FORCE 492 $(Q)mkdir -p include/linux include/config 493 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 494 495%config: scripts_basic outputmakefile FORCE 496 $(Q)mkdir -p include/linux include/config 497 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 498 499else 500# =========================================================================== 501# Build targets only - this includes vmlinux, arch specific targets, clean 502# targets and others. In general all targets except *config targets. 503 504ifeq ($(KBUILD_EXTMOD),) 505# Additional helpers built in scripts/ 506# Carefully list dependencies so we do not try to build scripts twice 507# in parallel 508PHONY += scripts 509scripts: scripts_basic include/config/auto.conf 510 $(Q)$(MAKE) $(build)=$(@) 511 512# Objects we will link into vmlinux / subdirs we need to visit 513init-y := init/ 514drivers-y := drivers/ sound/ firmware/ 515net-y := net/ 516libs-y := lib/ 517core-y := usr/ 518endif # KBUILD_EXTMOD 519 520ifeq ($(dot-config),1) 521# Read in config 522-include include/config/auto.conf 523 524ifeq ($(KBUILD_EXTMOD),) 525# Read in dependencies to all Kconfig* files, make sure to run 526# oldconfig if changes are detected. 527-include include/config/auto.conf.cmd 528 529# To avoid any implicit rule to kick in, define an empty command 530$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 531 532# If .config is newer than include/config/auto.conf, someone tinkered 533# with it and forgot to run make oldconfig. 534# if auto.conf.cmd is missing then we are probably in a cleaned tree so 535# we execute the config step to be sure to catch updated Kconfig files 536include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 537 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 538else 539# external modules needs include/linux/autoconf.h and include/config/auto.conf 540# but do not care if they are up-to-date. Use auto.conf to trigger the test 541PHONY += include/config/auto.conf 542 543include/config/auto.conf: 544 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 545 echo; \ 546 echo " ERROR: Kernel configuration is invalid."; \ 547 echo " include/linux/autoconf.h or $@ are missing."; \ 548 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 549 echo; \ 550 /bin/false) 551 552endif # KBUILD_EXTMOD 553 554else 555# Dummy target needed, because used as prerequisite 556include/config/auto.conf: ; 557endif # $(dot-config) 558 559# The all: target is the default when no target is given on the 560# command line. 561# This allow a user to issue only 'make' to build a kernel including modules 562# Defaults vmlinux but it is usually overridden in the arch makefile 563all: vmlinux 564 565ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 566KBUILD_CFLAGS += -Os 567else 568KBUILD_CFLAGS += -O2 569endif 570 571include $(srctree)/arch/$(SRCARCH)/Makefile 572 573ifneq ($(CONFIG_FRAME_WARN),0) 574KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 575endif 576 577# Force gcc to behave correct even for buggy distributions 578ifndef CONFIG_CC_STACKPROTECTOR 579KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 580endif 581 582ifdef CONFIG_FRAME_POINTER 583KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 584else 585KBUILD_CFLAGS += -fomit-frame-pointer 586endif 587 588ifdef CONFIG_DEBUG_INFO 589KBUILD_CFLAGS += -g 590KBUILD_AFLAGS += -gdwarf-2 591endif 592 593ifdef CONFIG_FUNCTION_TRACER 594KBUILD_CFLAGS += -pg 595endif 596 597# We trigger additional mismatches with less inlining 598ifdef CONFIG_DEBUG_SECTION_MISMATCH 599KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 600endif 601 602# arch Makefile may override CC so keep this after arch Makefile is included 603NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 604CHECKFLAGS += $(NOSTDINC_FLAGS) 605 606# warn about C99 declaration after statement 607KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 608 609# disable pointer signed / unsigned warnings in gcc 4.0 610KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 611 612# disable invalid "can't wrap" optimizations for signed / pointers 613KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 614 615# revert to pre-gcc-4.4 behaviour of .eh_frame 616KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 617 618# conserve stack if available 619KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 620 621# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 622# But warn user when we do so 623warn-assign = \ 624$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)") 625 626ifneq ($(KCPPFLAGS),) 627 $(call warn-assign,CPPFLAGS) 628 KBUILD_CPPFLAGS += $(KCPPFLAGS) 629endif 630ifneq ($(KAFLAGS),) 631 $(call warn-assign,AFLAGS) 632 KBUILD_AFLAGS += $(KAFLAGS) 633endif 634ifneq ($(KCFLAGS),) 635 $(call warn-assign,CFLAGS) 636 KBUILD_CFLAGS += $(KCFLAGS) 637endif 638 639# Use --build-id when available. 640LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 641 $(call cc-ldoption, -Wl$(comma)--build-id,)) 642LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 643LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 644 645ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 646LDFLAGS_vmlinux += $(call ld-option, -X,) 647endif 648 649# Default kernel image to build when no specific target is given. 650# KBUILD_IMAGE may be overruled on the command line or 651# set in the environment 652# Also any assignments in arch/$(ARCH)/Makefile take precedence over 653# this default value 654export KBUILD_IMAGE ?= vmlinux 655 656# 657# INSTALL_PATH specifies where to place the updated kernel and system map 658# images. Default is /boot, but you can set it to other values 659export INSTALL_PATH ?= /boot 660 661# 662# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 663# relocations required by build roots. This is not defined in the 664# makefile but the argument can be passed to make if needed. 665# 666 667MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 668export MODLIB 669 670# 671# INSTALL_MOD_STRIP, if defined, will cause modules to be 672# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 673# the default option --strip-debug will be used. Otherwise, 674# INSTALL_MOD_STRIP will used as the options to the strip command. 675 676ifdef INSTALL_MOD_STRIP 677ifeq ($(INSTALL_MOD_STRIP),1) 678mod_strip_cmd = $(STRIP) --strip-debug 679else 680mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 681endif # INSTALL_MOD_STRIP=1 682else 683mod_strip_cmd = true 684endif # INSTALL_MOD_STRIP 685export mod_strip_cmd 686 687 688ifeq ($(KBUILD_EXTMOD),) 689core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 690 691vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 692 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 693 $(net-y) $(net-m) $(libs-y) $(libs-m))) 694 695vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 696 $(init-n) $(init-) \ 697 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 698 $(net-n) $(net-) $(libs-n) $(libs-)))) 699 700init-y := $(patsubst %/, %/built-in.o, $(init-y)) 701core-y := $(patsubst %/, %/built-in.o, $(core-y)) 702drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 703net-y := $(patsubst %/, %/built-in.o, $(net-y)) 704libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 705libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 706libs-y := $(libs-y1) $(libs-y2) 707 708# Build vmlinux 709# --------------------------------------------------------------------------- 710# vmlinux is built from the objects selected by $(vmlinux-init) and 711# $(vmlinux-main). Most are built-in.o files from top-level directories 712# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 713# Ordering when linking is important, and $(vmlinux-init) must be first. 714# 715# vmlinux 716# ^ 717# | 718# +-< $(vmlinux-init) 719# | +--< init/version.o + more 720# | 721# +--< $(vmlinux-main) 722# | +--< driver/built-in.o mm/built-in.o + more 723# | 724# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 725# 726# vmlinux version (uname -v) cannot be updated during normal 727# descending-into-subdirs phase since we do not yet know if we need to 728# update vmlinux. 729# Therefore this step is delayed until just before final link of vmlinux - 730# except in the kallsyms case where it is done just before adding the 731# symbols to the kernel. 732# 733# System.map is generated to document addresses of all kernel symbols 734 735vmlinux-init := $(head-y) $(init-y) 736vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 737vmlinux-all := $(vmlinux-init) $(vmlinux-main) 738vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 739export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 740 741# Rule to link vmlinux - also used during CONFIG_KALLSYMS 742# May be overridden by arch/$(ARCH)/Makefile 743quiet_cmd_vmlinux__ ?= LD $@ 744 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 745 -T $(vmlinux-lds) $(vmlinux-init) \ 746 --start-group $(vmlinux-main) --end-group \ 747 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 748 749# Generate new vmlinux version 750quiet_cmd_vmlinux_version = GEN .version 751 cmd_vmlinux_version = set -e; \ 752 if [ ! -r .version ]; then \ 753 rm -f .version; \ 754 echo 1 >.version; \ 755 else \ 756 mv .version .old_version; \ 757 expr 0$$(cat .old_version) + 1 >.version; \ 758 fi; \ 759 $(MAKE) $(build)=init 760 761# Generate System.map 762quiet_cmd_sysmap = SYSMAP 763 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 764 765# Link of vmlinux 766# If CONFIG_KALLSYMS is set .version is already updated 767# Generate System.map and verify that the content is consistent 768# Use + in front of the vmlinux_version rule to silent warning with make -j2 769# First command is ':' to allow us to use + in front of the rule 770define rule_vmlinux__ 771 : 772 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 773 774 $(call cmd,vmlinux__) 775 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 776 777 $(Q)$(if $($(quiet)cmd_sysmap), \ 778 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 779 $(cmd_sysmap) $@ System.map; \ 780 if [ $$? -ne 0 ]; then \ 781 rm -f $@; \ 782 /bin/false; \ 783 fi; 784 $(verify_kallsyms) 785endef 786 787 788ifdef CONFIG_KALLSYMS 789# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 790# It's a three stage process: 791# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 792# empty 793# Running kallsyms on that gives us .tmp_kallsyms1.o with 794# the right size - vmlinux version (uname -v) is updated during this step 795# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 796# but due to the added section, some addresses have shifted. 797# From here, we generate a correct .tmp_kallsyms2.o 798# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 799# o Verify that the System.map from vmlinux matches the map from 800# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 801# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 802# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 803# temporary bypass to allow the kernel to be built while the 804# maintainers work out what went wrong with kallsyms. 805 806ifdef CONFIG_KALLSYMS_EXTRA_PASS 807last_kallsyms := 3 808else 809last_kallsyms := 2 810endif 811 812kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 813 814define verify_kallsyms 815 $(Q)$(if $($(quiet)cmd_sysmap), \ 816 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 817 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 818 $(Q)cmp -s System.map .tmp_System.map || \ 819 (echo Inconsistent kallsyms data; \ 820 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 821 rm .tmp_kallsyms* ; /bin/false ) 822endef 823 824# Update vmlinux version before link 825# Use + in front of this rule to silent warning about make -j1 826# First command is ':' to allow us to use + in front of this rule 827cmd_ksym_ld = $(cmd_vmlinux__) 828define rule_ksym_ld 829 : 830 +$(call cmd,vmlinux_version) 831 $(call cmd,vmlinux__) 832 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 833endef 834 835# Generate .S file with all kernel symbols 836quiet_cmd_kallsyms = KSYM $@ 837 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 838 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 839 840.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 841 $(call if_changed_dep,as_o_S) 842 843.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 844 $(call cmd,kallsyms) 845 846# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 847.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 848 $(call if_changed_rule,ksym_ld) 849 850.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 851 $(call if_changed,vmlinux__) 852 853.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 854 $(call if_changed,vmlinux__) 855 856# Needs to visit scripts/ before $(KALLSYMS) can be used. 857$(KALLSYMS): scripts ; 858 859# Generate some data for debugging strange kallsyms problems 860debug_kallsyms: .tmp_map$(last_kallsyms) 861 862.tmp_map%: .tmp_vmlinux% FORCE 863 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 864 865.tmp_map3: .tmp_map2 866 867.tmp_map2: .tmp_map1 868 869endif # ifdef CONFIG_KALLSYMS 870 871# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 872# relevant sections renamed as per the linker script. 873quiet_cmd_vmlinux-modpost = LD $@ 874 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 875 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 876 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 877define rule_vmlinux-modpost 878 : 879 +$(call cmd,vmlinux-modpost) 880 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 881 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 882endef 883 884# vmlinux image - including updated kernel symbols 885vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE 886ifdef CONFIG_HEADERS_CHECK 887 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 888endif 889ifdef CONFIG_SAMPLES 890 $(Q)$(MAKE) $(build)=samples 891endif 892ifdef CONFIG_BUILD_DOCSRC 893 $(Q)$(MAKE) $(build)=Documentation 894endif 895 $(call vmlinux-modpost) 896 $(call if_changed_rule,vmlinux__) 897 $(Q)rm -f .old_version 898 899# build vmlinux.o first to catch section mismatch errors early 900ifdef CONFIG_KALLSYMS 901.tmp_vmlinux1: vmlinux.o 902endif 903 904modpost-init := $(filter-out init/built-in.o, $(vmlinux-init)) 905vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE 906 $(call if_changed_rule,vmlinux-modpost) 907 908# The actual objects are generated when descending, 909# make sure no implicit rule kicks in 910$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 911 912# Handle descending into subdirectories listed in $(vmlinux-dirs) 913# Preset locale variables to speed up the build process. Limit locale 914# tweaks to this spot to avoid wrong language settings when running 915# make menuconfig etc. 916# Error messages still appears in the original language 917 918PHONY += $(vmlinux-dirs) 919$(vmlinux-dirs): prepare scripts 920 $(Q)$(MAKE) $(build)=$@ 921 922# Build the kernel release string 923# 924# The KERNELRELEASE value built here is stored in the file 925# include/config/kernel.release, and is used when executing several 926# make targets, such as "make install" or "make modules_install." 927# 928# The eventual kernel release string consists of the following fields, 929# shown in a hierarchical format to show how smaller parts are concatenated 930# to form the larger and final value, with values coming from places like 931# the Makefile, kernel config options, make command line options and/or 932# SCM tag information. 933# 934# $(KERNELVERSION) 935# $(VERSION) eg, 2 936# $(PATCHLEVEL) eg, 6 937# $(SUBLEVEL) eg, 18 938# $(EXTRAVERSION) eg, -rc6 939# $(localver-full) 940# $(localver) 941# localversion* (files without backups, containing '~') 942# $(CONFIG_LOCALVERSION) (from kernel config setting) 943# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 944# ./scripts/setlocalversion (SCM tag, if one exists) 945# $(LOCALVERSION) (from make command line if provided) 946# 947# Note how the final $(localver-auto) string is included *only* if the 948# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 949# moment, only git is supported but other SCMs can edit the script 950# scripts/setlocalversion and add the appropriate checks as needed. 951 952pattern = ".*/localversion[^~]*" 953string = $(shell cat /dev/null \ 954 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 955 956localver = $(subst $(space),, $(string) \ 957 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 958 959# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 960# and if the SCM is know a tag from the SCM is appended. 961# The appended tag is determined by the SCM used. 962# 963# .scmversion is used when generating rpm packages so we do not loose 964# the version information from the SCM when we do the build of the kernel 965# from the copied source 966ifdef CONFIG_LOCALVERSION_AUTO 967 968ifeq ($(wildcard .scmversion),) 969 _localver-auto = $(shell $(CONFIG_SHELL) \ 970 $(srctree)/scripts/setlocalversion $(srctree)) 971else 972 _localver-auto = $(shell cat .scmversion 2> /dev/null) 973endif 974 975 localver-auto = $(LOCALVERSION)$(_localver-auto) 976endif 977 978localver-full = $(localver)$(localver-auto) 979 980# Store (new) KERNELRELASE string in include/config/kernel.release 981kernelrelease = $(KERNELVERSION)$(localver-full) 982include/config/kernel.release: include/config/auto.conf FORCE 983 $(Q)rm -f $@ 984 $(Q)echo $(kernelrelease) > $@ 985 986 987# Things we need to do before we recursively start building the kernel 988# or the modules are listed in "prepare". 989# A multi level approach is used. prepareN is processed before prepareN-1. 990# archprepare is used in arch Makefiles and when processed asm symlink, 991# version.h and scripts_basic is processed / created. 992 993# Listed in dependency order 994PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 995 996# prepare3 is used to check if we are building in a separate output directory, 997# and if so do: 998# 1) Check that make has not been executed in the kernel src $(srctree) 999# 2) Create the include2 directory, used for the second asm symlink 1000prepare3: include/config/kernel.release 1001ifneq ($(KBUILD_SRC),) 1002 @$(kecho) ' Using $(srctree) as source for kernel' 1003 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 1004 echo " $(srctree) is not clean, please run 'make mrproper'";\ 1005 echo " in the '$(srctree)' directory.";\ 1006 /bin/false; \ 1007 fi; 1008 $(Q)if [ ! -d include2 ]; then \ 1009 mkdir -p include2; \ 1010 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \ 1011 fi 1012endif 1013 1014# prepare2 creates a makefile if using a separate output directory 1015prepare2: prepare3 outputmakefile 1016 1017prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 1018 include/asm include/config/auto.conf 1019 $(cmd_crmodverdir) 1020 1021archprepare: prepare1 scripts_basic 1022 1023prepare0: archprepare FORCE 1024 $(Q)$(MAKE) $(build)=. 1025 $(Q)$(MAKE) $(build)=. missing-syscalls 1026 1027# All the preparing.. 1028prepare: prepare0 1029 1030# The asm symlink changes when $(ARCH) changes. 1031# Detect this and ask user to run make mrproper 1032# If asm is a stale symlink (point to dir that does not exist) remove it 1033define check-symlink 1034 set -e; \ 1035 if [ -L include/asm ]; then \ 1036 asmlink=`readlink include/asm | cut -d '-' -f 2`; \ 1037 if [ "$$asmlink" != "$(SRCARCH)" ]; then \ 1038 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \ 1039 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \ 1040 exit 1; \ 1041 fi; \ 1042 test -e $$asmlink || rm include/asm; \ 1043 elif [ -d include/asm ]; then \ 1044 echo "ERROR: $@ is a directory but a symlink was expected";\ 1045 exit 1; \ 1046 fi 1047endef 1048 1049# We create the target directory of the symlink if it does 1050# not exist so the test in check-symlink works and we have a 1051# directory for generated filesas used by some architectures. 1052define create-symlink 1053 if [ ! -L include/asm ]; then \ 1054 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \ 1055 if [ ! -d include/asm-$(SRCARCH) ]; then \ 1056 mkdir -p include/asm-$(SRCARCH); \ 1057 fi; \ 1058 ln -fsn asm-$(SRCARCH) $@; \ 1059 fi 1060endef 1061 1062include/asm: FORCE 1063 $(Q)$(check-symlink) 1064 $(Q)$(create-symlink) 1065 1066# Generate some files 1067# --------------------------------------------------------------------------- 1068 1069# KERNELRELEASE can change from a few different places, meaning version.h 1070# needs to be updated, so this check is forced on all builds 1071 1072uts_len := 64 1073define filechk_utsrelease.h 1074 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1075 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1076 exit 1; \ 1077 fi; \ 1078 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 1079endef 1080 1081define filechk_version.h 1082 (echo \#define LINUX_VERSION_CODE $(shell \ 1083 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 1084 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 1085endef 1086 1087include/linux/version.h: $(srctree)/Makefile FORCE 1088 $(call filechk,version.h) 1089 1090include/linux/utsrelease.h: include/config/kernel.release FORCE 1091 $(call filechk,utsrelease.h) 1092 1093PHONY += headerdep 1094headerdep: 1095 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl 1096 1097# --------------------------------------------------------------------------- 1098 1099PHONY += depend dep 1100depend dep: 1101 @echo '*** Warning: make $@ is unnecessary now.' 1102 1103# --------------------------------------------------------------------------- 1104# Firmware install 1105INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 1106export INSTALL_FW_PATH 1107 1108PHONY += firmware_install 1109firmware_install: FORCE 1110 @mkdir -p $(objtree)/firmware 1111 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 1112 1113# --------------------------------------------------------------------------- 1114# Kernel headers 1115 1116#Default location for installed headers 1117export INSTALL_HDR_PATH = $(objtree)/usr 1118 1119hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 1120# Find out where the Kbuild file is located to support 1121# arch/$(ARCH)/include/asm 1122hdr-dir = $(strip \ 1123 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \ 1124 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch))) 1125 1126# If we do an all arch process set dst to asm-$(hdr-arch) 1127hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 1128 1129PHONY += __headers 1130__headers: include/linux/version.h scripts_basic FORCE 1131 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1132 1133PHONY += headers_install_all 1134headers_install_all: 1135 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 1136 1137PHONY += headers_install 1138headers_install: __headers 1139 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \ 1140 $(error Headers not exportable for the $(SRCARCH) architecture)) 1141 $(Q)$(MAKE) $(hdr-inst)=include 1142 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) 1143 1144PHONY += headers_check_all 1145headers_check_all: headers_install_all 1146 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 1147 1148PHONY += headers_check 1149headers_check: headers_install 1150 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1 1151 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1 1152 1153# --------------------------------------------------------------------------- 1154# Modules 1155 1156ifdef CONFIG_MODULES 1157 1158# By default, build modules as well 1159 1160all: modules 1161 1162# Build modules 1163# 1164# A module can be listed more than once in obj-m resulting in 1165# duplicate lines in modules.order files. Those are removed 1166# using awk while concatenating to the final file. 1167 1168PHONY += modules 1169modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 1170 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 1171 @$(kecho) ' Building modules, stage 2.'; 1172 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1173 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 1174 1175 1176# Target to prepare building external modules 1177PHONY += modules_prepare 1178modules_prepare: prepare scripts 1179 1180# Target to install modules 1181PHONY += modules_install 1182modules_install: _modinst_ _modinst_post 1183 1184PHONY += _modinst_ 1185_modinst_: 1186 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1187 echo "Warning: you may need to install module-init-tools"; \ 1188 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1189 sleep 1; \ 1190 fi 1191 @rm -rf $(MODLIB)/kernel 1192 @rm -f $(MODLIB)/source 1193 @mkdir -p $(MODLIB)/kernel 1194 @ln -s $(srctree) $(MODLIB)/source 1195 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1196 rm -f $(MODLIB)/build ; \ 1197 ln -s $(objtree) $(MODLIB)/build ; \ 1198 fi 1199 @cp -f $(objtree)/modules.order $(MODLIB)/ 1200 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1201 1202# This depmod is only for convenience to give the initial 1203# boot a modules.dep even before / is mounted read-write. However the 1204# boot script depmod is the master version. 1205PHONY += _modinst_post 1206_modinst_post: _modinst_ 1207 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 1208 $(call cmd,depmod) 1209 1210else # CONFIG_MODULES 1211 1212# Modules not configured 1213# --------------------------------------------------------------------------- 1214 1215modules modules_install: FORCE 1216 @echo 1217 @echo "The present kernel configuration has modules disabled." 1218 @echo "Type 'make config' and enable loadable module support." 1219 @echo "Then build a kernel with module support enabled." 1220 @echo 1221 @exit 1 1222 1223endif # CONFIG_MODULES 1224 1225### 1226# Cleaning is done on three levels. 1227# make clean Delete most generated files 1228# Leave enough to build external modules 1229# make mrproper Delete the current configuration, and all generated files 1230# make distclean Remove editor backup files, patch leftover files and the like 1231 1232# Directories & files removed with 'make clean' 1233CLEAN_DIRS += $(MODVERDIR) 1234CLEAN_FILES += vmlinux System.map \ 1235 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1236 1237# Directories & files removed with 'make mrproper' 1238MRPROPER_DIRS += include/config include2 usr/include include/generated 1239MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1240 include/linux/autoconf.h include/linux/version.h \ 1241 include/linux/utsrelease.h \ 1242 include/linux/bounds.h include/asm*/asm-offsets.h \ 1243 Module.symvers Module.markers tags TAGS cscope* 1244 1245# clean - Delete most, but leave enough to build external modules 1246# 1247clean: rm-dirs := $(CLEAN_DIRS) 1248clean: rm-files := $(CLEAN_FILES) 1249clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation) 1250 1251PHONY += $(clean-dirs) clean archclean 1252$(clean-dirs): 1253 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1254 1255clean: archclean $(clean-dirs) 1256 $(call cmd,rmdirs) 1257 $(call cmd,rmfiles) 1258 @find . $(RCS_FIND_IGNORE) \ 1259 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1260 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1261 -o -name '*.symtypes' -o -name 'modules.order' \ 1262 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \ 1263 -o -name '*.gcno' \) -type f -print | xargs rm -f 1264 1265# mrproper - Delete all generated files, including .config 1266# 1267mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1268mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1269mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1270 1271PHONY += $(mrproper-dirs) mrproper archmrproper 1272$(mrproper-dirs): 1273 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1274 1275mrproper: clean archmrproper $(mrproper-dirs) 1276 $(call cmd,rmdirs) 1277 $(call cmd,rmfiles) 1278 1279# distclean 1280# 1281PHONY += distclean 1282 1283distclean: mrproper 1284 @find $(srctree) $(RCS_FIND_IGNORE) \ 1285 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1286 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1287 -o -name '.*.rej' -o -size 0 \ 1288 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1289 -type f -print | xargs rm -f 1290 1291 1292# Packaging of the kernel to various formats 1293# --------------------------------------------------------------------------- 1294# rpm target kept for backward compatibility 1295package-dir := $(srctree)/scripts/package 1296 1297%pkg: include/config/kernel.release FORCE 1298 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1299rpm: include/config/kernel.release FORCE 1300 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1301 1302 1303# Brief documentation of the typical targets used 1304# --------------------------------------------------------------------------- 1305 1306boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1307boards := $(notdir $(boards)) 1308board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1309board-dirs := $(sort $(notdir $(board-dirs:/=))) 1310 1311help: 1312 @echo 'Cleaning targets:' 1313 @echo ' clean - Remove most generated files but keep the config and' 1314 @echo ' enough build support to build external modules' 1315 @echo ' mrproper - Remove all generated files + config + various backup files' 1316 @echo ' distclean - mrproper + remove editor backup and patch files' 1317 @echo '' 1318 @echo 'Configuration targets:' 1319 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1320 @echo '' 1321 @echo 'Other generic targets:' 1322 @echo ' all - Build all targets marked with [*]' 1323 @echo '* vmlinux - Build the bare kernel' 1324 @echo '* modules - Build all modules' 1325 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1326 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1327 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1328 @echo ' dir/ - Build all files in dir and below' 1329 @echo ' dir/file.[ois] - Build specified target only' 1330 @echo ' dir/file.ko - Build module including final link' 1331 @echo ' modules_prepare - Set up for building external modules' 1332 @echo ' tags/TAGS - Generate tags file for editors' 1333 @echo ' cscope - Generate cscope index' 1334 @echo ' kernelrelease - Output the release version string' 1335 @echo ' kernelversion - Output the version stored in Makefile' 1336 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1337 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1338 echo '' 1339 @echo 'Static analysers' 1340 @echo ' checkstack - Generate a list of stack hogs' 1341 @echo ' namespacecheck - Name space analysis on compiled kernel' 1342 @echo ' versioncheck - Sanity check on version.h usage' 1343 @echo ' includecheck - Check for duplicate included header files' 1344 @echo ' export_report - List the usages of all exported symbols' 1345 @echo ' headers_check - Sanity check on exported headers' 1346 @echo ' headerdep - Detect inclusion cycles in headers'; \ 1347 echo '' 1348 @echo 'Kernel packaging:' 1349 @$(MAKE) $(build)=$(package-dir) help 1350 @echo '' 1351 @echo 'Documentation targets:' 1352 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1353 @echo '' 1354 @echo 'Architecture specific targets ($(SRCARCH)):' 1355 @$(if $(archhelp),$(archhelp),\ 1356 echo ' No architecture specific help defined for $(SRCARCH)') 1357 @echo '' 1358 @$(if $(boards), \ 1359 $(foreach b, $(boards), \ 1360 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1361 echo '') 1362 @$(if $(board-dirs), \ 1363 $(foreach b, $(board-dirs), \ 1364 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1365 printf " %-16s - Show all of the above\\n" help-boards; \ 1366 echo '') 1367 1368 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1369 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1370 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1371 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1372 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1373 @echo '' 1374 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1375 @echo 'For further info see the ./README file' 1376 1377 1378help-board-dirs := $(addprefix help-,$(board-dirs)) 1379 1380help-boards: $(help-board-dirs) 1381 1382boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1383 1384$(help-board-dirs): help-%: 1385 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1386 @$(if $(boards-per-dir), \ 1387 $(foreach b, $(boards-per-dir), \ 1388 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1389 echo '') 1390 1391 1392# Documentation targets 1393# --------------------------------------------------------------------------- 1394%docs: scripts_basic FORCE 1395 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1396 1397else # KBUILD_EXTMOD 1398 1399### 1400# External module support. 1401# When building external modules the kernel used as basis is considered 1402# read-only, and no consistency checks are made and the make 1403# system is not used on the basis kernel. If updates are required 1404# in the basis kernel ordinary make commands (without M=...) must 1405# be used. 1406# 1407# The following are the only valid targets when building external 1408# modules. 1409# make M=dir clean Delete all automatically generated files 1410# make M=dir modules Make all modules in specified dir 1411# make M=dir Same as 'make M=dir modules' 1412# make M=dir modules_install 1413# Install the modules built in the module directory 1414# Assumes install directory is already created 1415 1416# We are always building modules 1417KBUILD_MODULES := 1 1418PHONY += crmodverdir 1419crmodverdir: 1420 $(cmd_crmodverdir) 1421 1422PHONY += $(objtree)/Module.symvers 1423$(objtree)/Module.symvers: 1424 @test -e $(objtree)/Module.symvers || ( \ 1425 echo; \ 1426 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1427 echo " is missing; modules will have no dependencies and modversions."; \ 1428 echo ) 1429 1430module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1431PHONY += $(module-dirs) modules 1432$(module-dirs): crmodverdir $(objtree)/Module.symvers 1433 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1434 1435modules: $(module-dirs) 1436 @$(kecho) ' Building modules, stage 2.'; 1437 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1438 1439PHONY += modules_install 1440modules_install: _emodinst_ _emodinst_post 1441 1442install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1443PHONY += _emodinst_ 1444_emodinst_: 1445 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1446 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1447 1448PHONY += _emodinst_post 1449_emodinst_post: _emodinst_ 1450 $(call cmd,depmod) 1451 1452clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1453 1454PHONY += $(clean-dirs) clean 1455$(clean-dirs): 1456 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1457 1458clean: rm-dirs := $(MODVERDIR) 1459clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \ 1460 $(KBUILD_EXTMOD)/Module.markers \ 1461 $(KBUILD_EXTMOD)/modules.order 1462clean: $(clean-dirs) 1463 $(call cmd,rmdirs) 1464 $(call cmd,rmfiles) 1465 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1466 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1467 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1468 -o -name '*.gcno' \) -type f -print | xargs rm -f 1469 1470help: 1471 @echo ' Building external modules.' 1472 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1473 @echo '' 1474 @echo ' modules - default target, build the module(s)' 1475 @echo ' modules_install - install the module' 1476 @echo ' clean - remove generated files in module directory only' 1477 @echo '' 1478 1479# Dummies... 1480PHONY += prepare scripts 1481prepare: ; 1482scripts: ; 1483endif # KBUILD_EXTMOD 1484 1485# Generate tags for editors 1486# --------------------------------------------------------------------------- 1487quiet_cmd_tags = GEN $@ 1488 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1489 1490tags TAGS cscope: FORCE 1491 $(call cmd,tags) 1492 1493# Scripts to check various things for consistency 1494# --------------------------------------------------------------------------- 1495 1496includecheck: 1497 find * $(RCS_FIND_IGNORE) \ 1498 -name '*.[hcS]' -type f -print | sort \ 1499 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1500 1501versioncheck: 1502 find * $(RCS_FIND_IGNORE) \ 1503 -name '*.[hcS]' -type f -print | sort \ 1504 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1505 1506namespacecheck: 1507 $(PERL) $(srctree)/scripts/namespace.pl 1508 1509export_report: 1510 $(PERL) $(srctree)/scripts/export_report.pl 1511 1512endif #ifeq ($(config-targets),1) 1513endif #ifeq ($(mixed-targets),1) 1514 1515PHONY += checkstack kernelrelease kernelversion 1516 1517# UML needs a little special treatment here. It wants to use the host 1518# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1519# else wants $(ARCH), including people doing cross-builds, which means 1520# that $(SUBARCH) doesn't work here. 1521ifeq ($(ARCH), um) 1522CHECKSTACK_ARCH := $(SUBARCH) 1523else 1524CHECKSTACK_ARCH := $(ARCH) 1525endif 1526checkstack: 1527 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1528 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1529 1530kernelrelease: 1531 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1532 $(error kernelrelease not valid - run 'make prepare' to update it)) 1533kernelversion: 1534 @echo $(KERNELVERSION) 1535 1536# Single targets 1537# --------------------------------------------------------------------------- 1538# Single targets are compatible with: 1539# - build with mixed source and output 1540# - build with separate output dir 'make O=...' 1541# - external modules 1542# 1543# target-dir => where to store outputfile 1544# build-dir => directory in kernel source tree to use 1545 1546ifeq ($(KBUILD_EXTMOD),) 1547 build-dir = $(patsubst %/,%,$(dir $@)) 1548 target-dir = $(dir $@) 1549else 1550 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1551 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1552 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1553endif 1554 1555%.s: %.c prepare scripts FORCE 1556 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1557%.i: %.c prepare scripts FORCE 1558 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1559%.o: %.c prepare scripts FORCE 1560 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1561%.lst: %.c prepare scripts FORCE 1562 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1563%.s: %.S prepare scripts FORCE 1564 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1565%.o: %.S prepare scripts FORCE 1566 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1567%.symtypes: %.c prepare scripts FORCE 1568 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1569 1570# Modules 1571/: prepare scripts FORCE 1572 $(cmd_crmodverdir) 1573 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1574 $(build)=$(build-dir) 1575%/: prepare scripts FORCE 1576 $(cmd_crmodverdir) 1577 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1578 $(build)=$(build-dir) 1579%.ko: prepare scripts FORCE 1580 $(cmd_crmodverdir) 1581 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1582 $(build)=$(build-dir) $(@:.ko=.o) 1583 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1584 1585# FIXME Should go into a make.lib or something 1586# =========================================================================== 1587 1588quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1589 cmd_rmdirs = rm -rf $(rm-dirs) 1590 1591quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1592 cmd_rmfiles = rm -f $(rm-files) 1593 1594# Run depmod only if we have System.map and depmod is executable 1595quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1596 cmd_depmod = \ 1597 if [ -r System.map -a -x $(DEPMOD) ]; then \ 1598 $(DEPMOD) -ae -F System.map \ 1599 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \ 1600 $(KERNELRELEASE); \ 1601 fi 1602 1603# Create temporary dir for module support files 1604# clean it up only when building all modules 1605cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1606 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1607 1608a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \ 1609 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \ 1610 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1611 1612quiet_cmd_as_o_S = AS $@ 1613cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1614 1615# read all saved command lines 1616 1617targets := $(wildcard $(sort $(targets))) 1618cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1619 1620ifneq ($(cmd_files),) 1621 $(cmd_files): ; # Do not try to update included dependency files 1622 include $(cmd_files) 1623endif 1624 1625# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1626# Usage: 1627# $(Q)$(MAKE) $(clean)=dir 1628clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1629 1630endif # skip-makefile 1631 1632PHONY += FORCE 1633FORCE: 1634 1635# Declare the contents of the .PHONY variable as phony. We keep that 1636# information in a variable so we can use it in if_changed and friends. 1637.PHONY: $(PHONY) 1638