1VERSION = 3 2PATCHLEVEL = 8 3SUBLEVEL = 0 4EXTRAVERSION = 5NAME = Unicycling Gorilla 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 @: 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/x86/ -e s/x86_64/x86/ \ 169 -e s/sun4u/sparc64/ \ 170 -e s/arm.*/arm/ -e s/sa110/arm/ \ 171 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 172 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ 173 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ ) 174 175# Cross compiling and selecting different set of gcc/bin-utils 176# --------------------------------------------------------------------------- 177# 178# When performing cross compilation for other architectures ARCH shall be set 179# to the target architecture. (See arch/* for the possibilities). 180# ARCH can be set during invocation of make: 181# make ARCH=ia64 182# Another way is to have ARCH set in the environment. 183# The default ARCH is the host where make is executed. 184 185# CROSS_COMPILE specify the prefix used for all executables used 186# during compilation. Only gcc and related bin-utils executables 187# are prefixed with $(CROSS_COMPILE). 188# CROSS_COMPILE can be set on the command line 189# make CROSS_COMPILE=ia64-linux- 190# Alternatively CROSS_COMPILE can be set in the environment. 191# A third alternative is to store a setting in .config so that plain 192# "make" in the configured kernel build directory always uses that. 193# Default value for CROSS_COMPILE is not to prefix executables 194# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 195export KBUILD_BUILDHOST := $(SUBARCH) 196ARCH ?= $(SUBARCH) 197CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%) 198 199# Architecture as present in compile.h 200UTS_MACHINE := $(ARCH) 201SRCARCH := $(ARCH) 202 203# Additional ARCH settings for x86 204ifeq ($(ARCH),i386) 205 SRCARCH := x86 206endif 207ifeq ($(ARCH),x86_64) 208 SRCARCH := x86 209endif 210 211# Additional ARCH settings for sparc 212ifeq ($(ARCH),sparc32) 213 SRCARCH := sparc 214endif 215ifeq ($(ARCH),sparc64) 216 SRCARCH := sparc 217endif 218 219# Additional ARCH settings for sh 220ifeq ($(ARCH),sh64) 221 SRCARCH := sh 222endif 223 224# Additional ARCH settings for tile 225ifeq ($(ARCH),tilepro) 226 SRCARCH := tile 227endif 228ifeq ($(ARCH),tilegx) 229 SRCARCH := tile 230endif 231 232# Where to locate arch specific headers 233hdr-arch := $(SRCARCH) 234 235KCONFIG_CONFIG ?= .config 236export KCONFIG_CONFIG 237 238# SHELL used by kbuild 239CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 240 else if [ -x /bin/bash ]; then echo /bin/bash; \ 241 else echo sh; fi ; fi) 242 243HOSTCC = gcc 244HOSTCXX = g++ 245HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer 246HOSTCXXFLAGS = -O2 247 248# Decide whether to build built-in, modular, or both. 249# Normally, just do built-in. 250 251KBUILD_MODULES := 252KBUILD_BUILTIN := 1 253 254# If we have only "make modules", don't compile built-in objects. 255# When we're building modules with modversions, we need to consider 256# the built-in objects during the descend as well, in order to 257# make sure the checksums are up to date before we record them. 258 259ifeq ($(MAKECMDGOALS),modules) 260 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 261endif 262 263# If we have "make <whatever> modules", compile modules 264# in addition to whatever we do anyway. 265# Just "make" or "make all" shall build modules as well 266 267ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 268 KBUILD_MODULES := 1 269endif 270 271ifeq ($(MAKECMDGOALS),) 272 KBUILD_MODULES := 1 273endif 274 275export KBUILD_MODULES KBUILD_BUILTIN 276export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 277 278# Beautify output 279# --------------------------------------------------------------------------- 280# 281# Normally, we echo the whole command before executing it. By making 282# that echo $($(quiet)$(cmd)), we now have the possibility to set 283# $(quiet) to choose other forms of output instead, e.g. 284# 285# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 286# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 287# 288# If $(quiet) is empty, the whole command will be printed. 289# If it is set to "quiet_", only the short version will be printed. 290# If it is set to "silent_", nothing will be printed at all, since 291# the variable $(silent_cmd_cc_o_c) doesn't exist. 292# 293# A simple variant is to prefix commands with $(Q) - that's useful 294# for commands that shall be hidden in non-verbose mode. 295# 296# $(Q)ln $@ :< 297# 298# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 299# If KBUILD_VERBOSE equals 1 then the above command is displayed. 300 301ifeq ($(KBUILD_VERBOSE),1) 302 quiet = 303 Q = 304else 305 quiet=quiet_ 306 Q = @ 307endif 308 309# If the user is running make -s (silent mode), suppress echoing of 310# commands 311 312ifneq ($(filter s% -s%,$(MAKEFLAGS)),) 313 quiet=silent_ 314endif 315 316export quiet Q KBUILD_VERBOSE 317 318 319# Look for make include files relative to root of kernel src 320MAKEFLAGS += --include-dir=$(srctree) 321 322# We need some generic definitions (do not try to remake the file). 323$(srctree)/scripts/Kbuild.include: ; 324include $(srctree)/scripts/Kbuild.include 325 326# Make variables (CC, etc...) 327 328AS = $(CROSS_COMPILE)as 329LD = $(CROSS_COMPILE)ld 330CC = $(CROSS_COMPILE)gcc 331CPP = $(CC) -E 332AR = $(CROSS_COMPILE)ar 333NM = $(CROSS_COMPILE)nm 334STRIP = $(CROSS_COMPILE)strip 335OBJCOPY = $(CROSS_COMPILE)objcopy 336OBJDUMP = $(CROSS_COMPILE)objdump 337AWK = awk 338GENKSYMS = scripts/genksyms/genksyms 339INSTALLKERNEL := installkernel 340DEPMOD = /sbin/depmod 341PERL = perl 342CHECK = sparse 343 344CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 345 -Wbitwise -Wno-return-void $(CF) 346CFLAGS_MODULE = 347AFLAGS_MODULE = 348LDFLAGS_MODULE = 349CFLAGS_KERNEL = 350AFLAGS_KERNEL = 351CFLAGS_GCOV = -fprofile-arcs -ftest-coverage 352 353 354# Use USERINCLUDE when you must reference the UAPI directories only. 355USERINCLUDE := \ 356 -I$(srctree)/arch/$(hdr-arch)/include/uapi \ 357 -Iarch/$(hdr-arch)/include/generated/uapi \ 358 -I$(srctree)/include/uapi \ 359 -Iinclude/generated/uapi \ 360 -include $(srctree)/include/linux/kconfig.h 361 362# Use LINUXINCLUDE when you must reference the include/ directory. 363# Needed to be compatible with the O= option 364LINUXINCLUDE := \ 365 -I$(srctree)/arch/$(hdr-arch)/include \ 366 -Iarch/$(hdr-arch)/include/generated \ 367 $(if $(KBUILD_SRC), -I$(srctree)/include) \ 368 -Iinclude \ 369 $(USERINCLUDE) 370 371KBUILD_CPPFLAGS := -D__KERNEL__ 372 373KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 374 -fno-strict-aliasing -fno-common \ 375 -Werror-implicit-function-declaration \ 376 -Wno-format-security \ 377 -fno-delete-null-pointer-checks 378KBUILD_AFLAGS_KERNEL := 379KBUILD_CFLAGS_KERNEL := 380KBUILD_AFLAGS := -D__ASSEMBLY__ 381KBUILD_AFLAGS_MODULE := -DMODULE 382KBUILD_CFLAGS_MODULE := -DMODULE 383KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 384 385# Read KERNELRELEASE from include/config/kernel.release (if it exists) 386KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 387KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 388 389export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 390export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 391export CPP AR NM STRIP OBJCOPY OBJDUMP 392export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE 393export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 394 395export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 396export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV 397export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 398export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 399export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 400export KBUILD_ARFLAGS 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 := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \ 410 -o -name .pc -o -name .hg -o -name .git \) -prune -o 411export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 412 --exclude CVS --exclude .pc --exclude .hg --exclude .git 413 414# =========================================================================== 415# Rules shared between *config targets and build targets 416 417# Basic helpers built in scripts/ 418PHONY += scripts_basic 419scripts_basic: 420 $(Q)$(MAKE) $(build)=scripts/basic 421 $(Q)rm -f .tmp_quiet_recordmcount 422 423# To avoid any implicit rule to kick in, define an empty command. 424scripts/basic/%: scripts_basic ; 425 426PHONY += outputmakefile 427# outputmakefile generates a Makefile in the output directory, if using a 428# separate output directory. This allows convenient use of make in the 429# output directory. 430outputmakefile: 431ifneq ($(KBUILD_SRC),) 432 $(Q)ln -fsn $(srctree) source 433 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 434 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 435endif 436 437# Support for using generic headers in asm-generic 438PHONY += asm-generic 439asm-generic: 440 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 441 src=asm obj=arch/$(SRCARCH)/include/generated/asm 442 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ 443 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm 444 445# To make sure we do not include .config for any of the *config targets 446# catch them early, and hand them over to scripts/kconfig/Makefile 447# It is allowed to specify more targets when calling make, including 448# mixing *config targets and build targets. 449# For example 'make oldconfig all'. 450# Detect when mixed targets is specified, and make a second invocation 451# of make so .config is not included in this case either (for *config). 452 453version_h := include/generated/uapi/linux/version.h 454 455no-dot-config-targets := clean mrproper distclean \ 456 cscope gtags TAGS tags help %docs check% coccicheck \ 457 $(version_h) headers_% archheaders archscripts \ 458 kernelversion %src-pkg 459 460config-targets := 0 461mixed-targets := 0 462dot-config := 1 463 464ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 465 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 466 dot-config := 0 467 endif 468endif 469 470ifeq ($(KBUILD_EXTMOD),) 471 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 472 config-targets := 1 473 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 474 mixed-targets := 1 475 endif 476 endif 477endif 478 479ifeq ($(mixed-targets),1) 480# =========================================================================== 481# We're called with mixed targets (*config and build targets). 482# Handle them one by one. 483 484%:: FORCE 485 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 486 487else 488ifeq ($(config-targets),1) 489# =========================================================================== 490# *config targets only - make sure prerequisites are updated, and descend 491# in scripts/kconfig to make the *config target 492 493# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 494# KBUILD_DEFCONFIG may point out an alternative default configuration 495# used for 'make defconfig' 496include $(srctree)/arch/$(SRCARCH)/Makefile 497export KBUILD_DEFCONFIG KBUILD_KCONFIG 498 499config: scripts_basic outputmakefile FORCE 500 $(Q)mkdir -p include/linux include/config 501 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 502 503%config: scripts_basic outputmakefile FORCE 504 $(Q)mkdir -p include/linux include/config 505 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 506 507else 508# =========================================================================== 509# Build targets only - this includes vmlinux, arch specific targets, clean 510# targets and others. In general all targets except *config targets. 511 512ifeq ($(KBUILD_EXTMOD),) 513# Additional helpers built in scripts/ 514# Carefully list dependencies so we do not try to build scripts twice 515# in parallel 516PHONY += scripts 517scripts: scripts_basic include/config/auto.conf include/config/tristate.conf 518 $(Q)$(MAKE) $(build)=$(@) 519 520# Objects we will link into vmlinux / subdirs we need to visit 521init-y := init/ 522drivers-y := drivers/ sound/ firmware/ 523net-y := net/ 524libs-y := lib/ 525core-y := usr/ 526endif # KBUILD_EXTMOD 527 528ifeq ($(dot-config),1) 529# Read in config 530-include include/config/auto.conf 531 532ifeq ($(KBUILD_EXTMOD),) 533# Read in dependencies to all Kconfig* files, make sure to run 534# oldconfig if changes are detected. 535-include include/config/auto.conf.cmd 536 537# To avoid any implicit rule to kick in, define an empty command 538$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 539 540# If .config is newer than include/config/auto.conf, someone tinkered 541# with it and forgot to run make oldconfig. 542# if auto.conf.cmd is missing then we are probably in a cleaned tree so 543# we execute the config step to be sure to catch updated Kconfig files 544include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 545 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 546else 547# external modules needs include/generated/autoconf.h and include/config/auto.conf 548# but do not care if they are up-to-date. Use auto.conf to trigger the test 549PHONY += include/config/auto.conf 550 551include/config/auto.conf: 552 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 553 echo >&2; \ 554 echo >&2 " ERROR: Kernel configuration is invalid."; \ 555 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 556 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 557 echo >&2 ; \ 558 /bin/false) 559 560endif # KBUILD_EXTMOD 561 562else 563# Dummy target needed, because used as prerequisite 564include/config/auto.conf: ; 565endif # $(dot-config) 566 567# The all: target is the default when no target is given on the 568# command line. 569# This allow a user to issue only 'make' to build a kernel including modules 570# Defaults to vmlinux, but the arch makefile usually adds further targets 571all: vmlinux 572 573ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 574KBUILD_CFLAGS += -Os 575else 576KBUILD_CFLAGS += -O2 577endif 578 579include $(srctree)/arch/$(SRCARCH)/Makefile 580 581ifdef CONFIG_READABLE_ASM 582# Disable optimizations that make assembler listings hard to read. 583# reorder blocks reorders the control in the function 584# ipa clone creates specialized cloned functions 585# partial inlining inlines only parts of functions 586KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 587 $(call cc-option,-fno-ipa-cp-clone,) \ 588 $(call cc-option,-fno-partial-inlining) 589endif 590 591ifneq ($(CONFIG_FRAME_WARN),0) 592KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 593endif 594 595# Force gcc to behave correct even for buggy distributions 596ifndef CONFIG_CC_STACKPROTECTOR 597KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 598endif 599 600# This warning generated too much noise in a regular build. 601# Use make W=1 to enable this warning (see scripts/Makefile.build) 602KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) 603 604ifdef CONFIG_FRAME_POINTER 605KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 606else 607# Some targets (ARM with Thumb2, for example), can't be built with frame 608# pointers. For those, we don't have FUNCTION_TRACER automatically 609# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 610# incompatible with -fomit-frame-pointer with current GCC, so we don't use 611# -fomit-frame-pointer with FUNCTION_TRACER. 612ifndef CONFIG_FUNCTION_TRACER 613KBUILD_CFLAGS += -fomit-frame-pointer 614endif 615endif 616 617ifdef CONFIG_DEBUG_INFO 618KBUILD_CFLAGS += -g 619KBUILD_AFLAGS += -gdwarf-2 620endif 621 622ifdef CONFIG_DEBUG_INFO_REDUCED 623KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) 624endif 625 626ifdef CONFIG_FUNCTION_TRACER 627ifdef CONFIG_HAVE_FENTRY 628CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY) 629endif 630KBUILD_CFLAGS += -pg $(CC_USING_FENTRY) 631KBUILD_AFLAGS += $(CC_USING_FENTRY) 632ifdef CONFIG_DYNAMIC_FTRACE 633 ifdef CONFIG_HAVE_C_RECORDMCOUNT 634 BUILD_C_RECORDMCOUNT := y 635 export BUILD_C_RECORDMCOUNT 636 endif 637endif 638endif 639 640# We trigger additional mismatches with less inlining 641ifdef CONFIG_DEBUG_SECTION_MISMATCH 642KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 643endif 644 645# arch Makefile may override CC so keep this after arch Makefile is included 646NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 647CHECKFLAGS += $(NOSTDINC_FLAGS) 648 649# warn about C99 declaration after statement 650KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 651 652# disable pointer signed / unsigned warnings in gcc 4.0 653KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) 654 655# disable invalid "can't wrap" optimizations for signed / pointers 656KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 657 658# conserve stack if available 659KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 660 661# use the deterministic mode of AR if available 662KBUILD_ARFLAGS := $(call ar-option,D) 663 664# check for 'asm goto' 665ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y) 666 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO 667endif 668 669# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments 670KBUILD_CPPFLAGS += $(KCPPFLAGS) 671KBUILD_AFLAGS += $(KAFLAGS) 672KBUILD_CFLAGS += $(KCFLAGS) 673 674# Use --build-id when available. 675LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 676 $(call cc-ldoption, -Wl$(comma)--build-id,)) 677KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 678LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 679 680ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 681LDFLAGS_vmlinux += $(call ld-option, -X,) 682endif 683 684# Default kernel image to build when no specific target is given. 685# KBUILD_IMAGE may be overruled on the command line or 686# set in the environment 687# Also any assignments in arch/$(ARCH)/Makefile take precedence over 688# this default value 689export KBUILD_IMAGE ?= vmlinux 690 691# 692# INSTALL_PATH specifies where to place the updated kernel and system map 693# images. Default is /boot, but you can set it to other values 694export INSTALL_PATH ?= /boot 695 696# 697# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 698# relocations required by build roots. This is not defined in the 699# makefile but the argument can be passed to make if needed. 700# 701 702MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 703export MODLIB 704 705# 706# INSTALL_MOD_STRIP, if defined, will cause modules to be 707# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 708# the default option --strip-debug will be used. Otherwise, 709# INSTALL_MOD_STRIP value will be used as the options to the strip command. 710 711ifdef INSTALL_MOD_STRIP 712ifeq ($(INSTALL_MOD_STRIP),1) 713mod_strip_cmd = $(STRIP) --strip-debug 714else 715mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 716endif # INSTALL_MOD_STRIP=1 717else 718mod_strip_cmd = true 719endif # INSTALL_MOD_STRIP 720export mod_strip_cmd 721 722 723ifeq ($(CONFIG_MODULE_SIG),y) 724MODSECKEY = ./signing_key.priv 725MODPUBKEY = ./signing_key.x509 726export MODPUBKEY 727mod_sign_cmd = perl $(srctree)/scripts/sign-file $(MODSECKEY) $(MODPUBKEY) 728else 729mod_sign_cmd = true 730endif 731export mod_sign_cmd 732 733 734ifeq ($(KBUILD_EXTMOD),) 735core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 736 737vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 738 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 739 $(net-y) $(net-m) $(libs-y) $(libs-m))) 740 741vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 742 $(init-n) $(init-) \ 743 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 744 $(net-n) $(net-) $(libs-n) $(libs-)))) 745 746init-y := $(patsubst %/, %/built-in.o, $(init-y)) 747core-y := $(patsubst %/, %/built-in.o, $(core-y)) 748drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 749net-y := $(patsubst %/, %/built-in.o, $(net-y)) 750libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 751libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 752libs-y := $(libs-y1) $(libs-y2) 753 754# Externally visible symbols (used by link-vmlinux.sh) 755export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) 756export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y) 757export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 758export LDFLAGS_vmlinux 759 760vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) 761 762# Final link of vmlinux 763 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) 764quiet_cmd_link-vmlinux = LINK $@ 765 766# Include targets which we want to 767# execute if the rest of the kernel build went well. 768vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE 769ifdef CONFIG_HEADERS_CHECK 770 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 771endif 772ifdef CONFIG_SAMPLES 773 $(Q)$(MAKE) $(build)=samples 774endif 775ifdef CONFIG_BUILD_DOCSRC 776 $(Q)$(MAKE) $(build)=Documentation 777endif 778 +$(call if_changed,link-vmlinux) 779 780# The actual objects are generated when descending, 781# make sure no implicit rule kicks in 782$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 783 784# Handle descending into subdirectories listed in $(vmlinux-dirs) 785# Preset locale variables to speed up the build process. Limit locale 786# tweaks to this spot to avoid wrong language settings when running 787# make menuconfig etc. 788# Error messages still appears in the original language 789 790PHONY += $(vmlinux-dirs) 791$(vmlinux-dirs): prepare scripts 792 $(Q)$(MAKE) $(build)=$@ 793 794# Store (new) KERNELRELASE string in include/config/kernel.release 795include/config/kernel.release: include/config/auto.conf FORCE 796 $(Q)rm -f $@ 797 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@ 798 799 800# Things we need to do before we recursively start building the kernel 801# or the modules are listed in "prepare". 802# A multi level approach is used. prepareN is processed before prepareN-1. 803# archprepare is used in arch Makefiles and when processed asm symlink, 804# version.h and scripts_basic is processed / created. 805 806# Listed in dependency order 807PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 808 809# prepare3 is used to check if we are building in a separate output directory, 810# and if so do: 811# 1) Check that make has not been executed in the kernel src $(srctree) 812prepare3: include/config/kernel.release 813ifneq ($(KBUILD_SRC),) 814 @$(kecho) ' Using $(srctree) as source for kernel' 815 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 816 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 817 echo >&2 " in the '$(srctree)' directory.";\ 818 /bin/false; \ 819 fi; 820endif 821 822# prepare2 creates a makefile if using a separate output directory 823prepare2: prepare3 outputmakefile asm-generic 824 825prepare1: prepare2 $(version_h) include/generated/utsrelease.h \ 826 include/config/auto.conf 827 $(cmd_crmodverdir) 828 829archprepare: archheaders archscripts prepare1 scripts_basic 830 831prepare0: archprepare FORCE 832 $(Q)$(MAKE) $(build)=. 833 834# All the preparing.. 835prepare: prepare0 836 837# Generate some files 838# --------------------------------------------------------------------------- 839 840# KERNELRELEASE can change from a few different places, meaning version.h 841# needs to be updated, so this check is forced on all builds 842 843uts_len := 64 844define filechk_utsrelease.h 845 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 846 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 847 exit 1; \ 848 fi; \ 849 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 850endef 851 852define filechk_version.h 853 (echo \#define LINUX_VERSION_CODE $(shell \ 854 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 855 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 856endef 857 858$(version_h): $(srctree)/Makefile FORCE 859 $(call filechk,version.h) 860 861include/generated/utsrelease.h: include/config/kernel.release FORCE 862 $(call filechk,utsrelease.h) 863 864PHONY += headerdep 865headerdep: 866 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 867 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 868 869# --------------------------------------------------------------------------- 870 871PHONY += depend dep 872depend dep: 873 @echo '*** Warning: make $@ is unnecessary now.' 874 875# --------------------------------------------------------------------------- 876# Firmware install 877INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware 878export INSTALL_FW_PATH 879 880PHONY += firmware_install 881firmware_install: FORCE 882 @mkdir -p $(objtree)/firmware 883 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install 884 885# --------------------------------------------------------------------------- 886# Kernel headers 887 888#Default location for installed headers 889export INSTALL_HDR_PATH = $(objtree)/usr 890 891hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj 892 893# If we do an all arch process set dst to asm-$(hdr-arch) 894hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm) 895 896PHONY += archheaders 897archheaders: 898 899PHONY += archscripts 900archscripts: 901 902PHONY += __headers 903__headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE 904 $(Q)$(MAKE) $(build)=scripts build_unifdef 905 906PHONY += headers_install_all 907headers_install_all: 908 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install 909 910PHONY += headers_install 911headers_install: __headers 912 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \ 913 $(error Headers not exportable for the $(SRCARCH) architecture)) 914 $(Q)$(MAKE) $(hdr-inst)=include/uapi 915 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) 916 917PHONY += headers_check_all 918headers_check_all: headers_install_all 919 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check 920 921PHONY += headers_check 922headers_check: headers_install 923 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 924 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1 925 926# --------------------------------------------------------------------------- 927# Modules 928 929ifdef CONFIG_MODULES 930 931# By default, build modules as well 932 933all: modules 934 935# Build modules 936# 937# A module can be listed more than once in obj-m resulting in 938# duplicate lines in modules.order files. Those are removed 939# using awk while concatenating to the final file. 940 941PHONY += modules 942modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin 943 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order 944 @$(kecho) ' Building modules, stage 2.'; 945 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 946 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild 947 948modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) 949 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin 950 951%/modules.builtin: include/config/auto.conf 952 $(Q)$(MAKE) $(modbuiltin)=$* 953 954 955# Target to prepare building external modules 956PHONY += modules_prepare 957modules_prepare: prepare scripts 958 959# Target to install modules 960PHONY += modules_install 961modules_install: _modinst_ _modinst_post 962 963PHONY += _modinst_ 964_modinst_: 965 @rm -rf $(MODLIB)/kernel 966 @rm -f $(MODLIB)/source 967 @mkdir -p $(MODLIB)/kernel 968 @ln -s $(srctree) $(MODLIB)/source 969 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 970 rm -f $(MODLIB)/build ; \ 971 ln -s $(objtree) $(MODLIB)/build ; \ 972 fi 973 @cp -f $(objtree)/modules.order $(MODLIB)/ 974 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 975 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 976 977# This depmod is only for convenience to give the initial 978# boot a modules.dep even before / is mounted read-write. However the 979# boot script depmod is the master version. 980PHONY += _modinst_post 981_modinst_post: _modinst_ 982 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst 983 $(call cmd,depmod) 984 985ifeq ($(CONFIG_MODULE_SIG), y) 986PHONY += modules_sign 987modules_sign: 988 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 989endif 990 991else # CONFIG_MODULES 992 993# Modules not configured 994# --------------------------------------------------------------------------- 995 996modules modules_install: FORCE 997 @echo >&2 998 @echo >&2 "The present kernel configuration has modules disabled." 999 @echo >&2 "Type 'make config' and enable loadable module support." 1000 @echo >&2 "Then build a kernel with module support enabled." 1001 @echo >&2 1002 @exit 1 1003 1004endif # CONFIG_MODULES 1005 1006### 1007# Cleaning is done on three levels. 1008# make clean Delete most generated files 1009# Leave enough to build external modules 1010# make mrproper Delete the current configuration, and all generated files 1011# make distclean Remove editor backup files, patch leftover files and the like 1012 1013# Directories & files removed with 'make clean' 1014CLEAN_DIRS += $(MODVERDIR) 1015 1016# Directories & files removed with 'make mrproper' 1017MRPROPER_DIRS += include/config usr/include include/generated \ 1018 arch/*/include/generated 1019MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \ 1020 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1021 signing_key.priv signing_key.x509 x509.genkey \ 1022 extra_certificates signing_key.x509.keyid \ 1023 signing_key.x509.signer 1024 1025# clean - Delete most, but leave enough to build external modules 1026# 1027clean: rm-dirs := $(CLEAN_DIRS) 1028clean: rm-files := $(CLEAN_FILES) 1029clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) 1030 1031PHONY += $(clean-dirs) clean archclean vmlinuxclean 1032$(clean-dirs): 1033 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1034 1035vmlinuxclean: 1036 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1037 1038clean: archclean vmlinuxclean 1039 1040# mrproper - Delete all generated files, including .config 1041# 1042mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1043mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1044mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1045 1046PHONY += $(mrproper-dirs) mrproper archmrproper 1047$(mrproper-dirs): 1048 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1049 1050mrproper: clean archmrproper $(mrproper-dirs) 1051 $(call cmd,rmdirs) 1052 $(call cmd,rmfiles) 1053 1054# distclean 1055# 1056PHONY += distclean 1057 1058distclean: mrproper 1059 @find $(srctree) $(RCS_FIND_IGNORE) \ 1060 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1061 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1062 -o -name '.*.rej' \ 1063 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1064 -type f -print | xargs rm -f 1065 1066 1067# Packaging of the kernel to various formats 1068# --------------------------------------------------------------------------- 1069# rpm target kept for backward compatibility 1070package-dir := $(srctree)/scripts/package 1071 1072%src-pkg: FORCE 1073 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1074%pkg: include/config/kernel.release FORCE 1075 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1076rpm: include/config/kernel.release FORCE 1077 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1078 1079 1080# Brief documentation of the typical targets used 1081# --------------------------------------------------------------------------- 1082 1083boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1084boards := $(notdir $(boards)) 1085board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1086board-dirs := $(sort $(notdir $(board-dirs:/=))) 1087 1088help: 1089 @echo 'Cleaning targets:' 1090 @echo ' clean - Remove most generated files but keep the config and' 1091 @echo ' enough build support to build external modules' 1092 @echo ' mrproper - Remove all generated files + config + various backup files' 1093 @echo ' distclean - mrproper + remove editor backup and patch files' 1094 @echo '' 1095 @echo 'Configuration targets:' 1096 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1097 @echo '' 1098 @echo 'Other generic targets:' 1099 @echo ' all - Build all targets marked with [*]' 1100 @echo '* vmlinux - Build the bare kernel' 1101 @echo '* modules - Build all modules' 1102 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1103 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' 1104 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' 1105 @echo ' dir/ - Build all files in dir and below' 1106 @echo ' dir/file.[oisS] - Build specified target only' 1107 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1108 @echo ' (requires a recent binutils and recent build (System.map))' 1109 @echo ' dir/file.ko - Build module including final link' 1110 @echo ' modules_prepare - Set up for building external modules' 1111 @echo ' tags/TAGS - Generate tags file for editors' 1112 @echo ' cscope - Generate cscope index' 1113 @echo ' gtags - Generate GNU GLOBAL index' 1114 @echo ' kernelrelease - Output the release version string' 1115 @echo ' kernelversion - Output the version stored in Makefile' 1116 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1117 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1118 echo '' 1119 @echo 'Static analysers' 1120 @echo ' checkstack - Generate a list of stack hogs' 1121 @echo ' namespacecheck - Name space analysis on compiled kernel' 1122 @echo ' versioncheck - Sanity check on version.h usage' 1123 @echo ' includecheck - Check for duplicate included header files' 1124 @echo ' export_report - List the usages of all exported symbols' 1125 @echo ' headers_check - Sanity check on exported headers' 1126 @echo ' headerdep - Detect inclusion cycles in headers' 1127 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help 1128 @echo '' 1129 @echo 'Kernel packaging:' 1130 @$(MAKE) $(build)=$(package-dir) help 1131 @echo '' 1132 @echo 'Documentation targets:' 1133 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1134 @echo '' 1135 @echo 'Architecture specific targets ($(SRCARCH)):' 1136 @$(if $(archhelp),$(archhelp),\ 1137 echo ' No architecture specific help defined for $(SRCARCH)') 1138 @echo '' 1139 @$(if $(boards), \ 1140 $(foreach b, $(boards), \ 1141 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1142 echo '') 1143 @$(if $(board-dirs), \ 1144 $(foreach b, $(board-dirs), \ 1145 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1146 printf " %-16s - Show all of the above\\n" help-boards; \ 1147 echo '') 1148 1149 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1150 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1151 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1152 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1153 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1154 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1155 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1156 @echo ' 1: warnings which may be relevant and do not occur too often' 1157 @echo ' 2: warnings which occur quite often but may still be relevant' 1158 @echo ' 3: more obscure warnings, can most likely be ignored' 1159 @echo ' Multiple levels can be combined with W=12 or W=123' 1160 @echo '' 1161 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1162 @echo 'For further info see the ./README file' 1163 1164 1165help-board-dirs := $(addprefix help-,$(board-dirs)) 1166 1167help-boards: $(help-board-dirs) 1168 1169boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)) 1170 1171$(help-board-dirs): help-%: 1172 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1173 @$(if $(boards-per-dir), \ 1174 $(foreach b, $(boards-per-dir), \ 1175 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1176 echo '') 1177 1178 1179# Documentation targets 1180# --------------------------------------------------------------------------- 1181%docs: scripts_basic FORCE 1182 $(Q)$(MAKE) $(build)=scripts build_docproc 1183 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1184 1185else # KBUILD_EXTMOD 1186 1187### 1188# External module support. 1189# When building external modules the kernel used as basis is considered 1190# read-only, and no consistency checks are made and the make 1191# system is not used on the basis kernel. If updates are required 1192# in the basis kernel ordinary make commands (without M=...) must 1193# be used. 1194# 1195# The following are the only valid targets when building external 1196# modules. 1197# make M=dir clean Delete all automatically generated files 1198# make M=dir modules Make all modules in specified dir 1199# make M=dir Same as 'make M=dir modules' 1200# make M=dir modules_install 1201# Install the modules built in the module directory 1202# Assumes install directory is already created 1203 1204# We are always building modules 1205KBUILD_MODULES := 1 1206PHONY += crmodverdir 1207crmodverdir: 1208 $(cmd_crmodverdir) 1209 1210PHONY += $(objtree)/Module.symvers 1211$(objtree)/Module.symvers: 1212 @test -e $(objtree)/Module.symvers || ( \ 1213 echo; \ 1214 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1215 echo " is missing; modules will have no dependencies and modversions."; \ 1216 echo ) 1217 1218module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1219PHONY += $(module-dirs) modules 1220$(module-dirs): crmodverdir $(objtree)/Module.symvers 1221 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1222 1223modules: $(module-dirs) 1224 @$(kecho) ' Building modules, stage 2.'; 1225 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1226 1227PHONY += modules_install 1228modules_install: _emodinst_ _emodinst_post 1229 1230install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1231PHONY += _emodinst_ 1232_emodinst_: 1233 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1234 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1235 1236PHONY += _emodinst_post 1237_emodinst_post: _emodinst_ 1238 $(call cmd,depmod) 1239 1240clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1241 1242PHONY += $(clean-dirs) clean 1243$(clean-dirs): 1244 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1245 1246clean: rm-dirs := $(MODVERDIR) 1247clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1248 1249help: 1250 @echo ' Building external modules.' 1251 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1252 @echo '' 1253 @echo ' modules - default target, build the module(s)' 1254 @echo ' modules_install - install the module' 1255 @echo ' clean - remove generated files in module directory only' 1256 @echo '' 1257 1258# Dummies... 1259PHONY += prepare scripts 1260prepare: ; 1261scripts: ; 1262endif # KBUILD_EXTMOD 1263 1264clean: $(clean-dirs) 1265 $(call cmd,rmdirs) 1266 $(call cmd,rmfiles) 1267 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1268 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1269 -o -name '*.ko.*' \ 1270 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1271 -o -name '*.symtypes' -o -name 'modules.order' \ 1272 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1273 -o -name '*.gcno' \) -type f -print | xargs rm -f 1274 1275# Generate tags for editors 1276# --------------------------------------------------------------------------- 1277quiet_cmd_tags = GEN $@ 1278 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1279 1280tags TAGS cscope gtags: FORCE 1281 $(call cmd,tags) 1282 1283# Scripts to check various things for consistency 1284# --------------------------------------------------------------------------- 1285 1286PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1287 1288includecheck: 1289 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1290 -name '*.[hcS]' -type f -print | sort \ 1291 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1292 1293versioncheck: 1294 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1295 -name '*.[hcS]' -type f -print | sort \ 1296 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1297 1298coccicheck: 1299 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1300 1301namespacecheck: 1302 $(PERL) $(srctree)/scripts/namespace.pl 1303 1304export_report: 1305 $(PERL) $(srctree)/scripts/export_report.pl 1306 1307endif #ifeq ($(config-targets),1) 1308endif #ifeq ($(mixed-targets),1) 1309 1310PHONY += checkstack kernelrelease kernelversion 1311 1312# UML needs a little special treatment here. It wants to use the host 1313# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1314# else wants $(ARCH), including people doing cross-builds, which means 1315# that $(SUBARCH) doesn't work here. 1316ifeq ($(ARCH), um) 1317CHECKSTACK_ARCH := $(SUBARCH) 1318else 1319CHECKSTACK_ARCH := $(ARCH) 1320endif 1321checkstack: 1322 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1323 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1324 1325kernelrelease: 1326 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1327 1328kernelversion: 1329 @echo $(KERNELVERSION) 1330 1331# Clear a bunch of variables before executing the submake 1332tools/: FORCE 1333 $(Q)mkdir -p $(objtree)/tools 1334 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ 1335 1336tools/%: FORCE 1337 $(Q)mkdir -p $(objtree)/tools 1338 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ $* 1339 1340# Single targets 1341# --------------------------------------------------------------------------- 1342# Single targets are compatible with: 1343# - build with mixed source and output 1344# - build with separate output dir 'make O=...' 1345# - external modules 1346# 1347# target-dir => where to store outputfile 1348# build-dir => directory in kernel source tree to use 1349 1350ifeq ($(KBUILD_EXTMOD),) 1351 build-dir = $(patsubst %/,%,$(dir $@)) 1352 target-dir = $(dir $@) 1353else 1354 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1355 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1356 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1357endif 1358 1359%.s: %.c prepare scripts FORCE 1360 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1361%.i: %.c prepare scripts FORCE 1362 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1363%.o: %.c prepare scripts FORCE 1364 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1365%.lst: %.c prepare scripts FORCE 1366 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1367%.s: %.S prepare scripts FORCE 1368 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1369%.o: %.S prepare scripts FORCE 1370 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1371%.symtypes: %.c prepare scripts FORCE 1372 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1373 1374# Modules 1375/: prepare scripts FORCE 1376 $(cmd_crmodverdir) 1377 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1378 $(build)=$(build-dir) 1379%/: prepare scripts FORCE 1380 $(cmd_crmodverdir) 1381 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1382 $(build)=$(build-dir) 1383%.ko: prepare scripts FORCE 1384 $(cmd_crmodverdir) 1385 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1386 $(build)=$(build-dir) $(@:.ko=.o) 1387 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1388 1389# FIXME Should go into a make.lib or something 1390# =========================================================================== 1391 1392quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1393 cmd_rmdirs = rm -rf $(rm-dirs) 1394 1395quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1396 cmd_rmfiles = rm -f $(rm-files) 1397 1398# Run depmod only if we have System.map and depmod is executable 1399quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1400 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1401 $(KERNELRELEASE) 1402 1403# Create temporary dir for module support files 1404# clean it up only when building all modules 1405cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1406 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1407 1408# read all saved command lines 1409 1410targets := $(wildcard $(sort $(targets))) 1411cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1412 1413ifneq ($(cmd_files),) 1414 $(cmd_files): ; # Do not try to update included dependency files 1415 include $(cmd_files) 1416endif 1417 1418# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1419# Usage: 1420# $(Q)$(MAKE) $(clean)=dir 1421clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1422 1423endif # skip-makefile 1424 1425PHONY += FORCE 1426FORCE: 1427 1428# Declare the contents of the .PHONY variable as phony. We keep that 1429# information in a variable so we can use it in if_changed and friends. 1430.PHONY: $(PHONY) 1431