1# SPDX-License-Identifier: GPL-2.0 2VERSION = 5 3PATCHLEVEL = 2 4SUBLEVEL = 0 5EXTRAVERSION = -rc4 6NAME = Golden Lions 7 8# *DOCUMENTATION* 9# To see a list of typical targets execute "make help" 10# More info can be located in ./README 11# Comments in this file are targeted only to the developer, do not 12# expect to learn how to build the kernel reading this file. 13 14# That's our default target when none is given on the command line 15PHONY := _all 16_all: 17 18# We are using a recursive build, so we need to do a little thinking 19# to get the ordering right. 20# 21# Most importantly: sub-Makefiles should only ever modify files in 22# their own directory. If in some directory we have a dependency on 23# a file in another dir (which doesn't happen often, but it's often 24# unavoidable when linking the built-in.a targets which finally 25# turn into vmlinux), we will call a sub make in that other dir, and 26# after that we are sure that everything which is in that other dir 27# is now up to date. 28# 29# The only cases where we need to modify files which have global 30# effects are thus separated out and done before the recursive 31# descending is started. They are now explicitly listed as the 32# prepare rule. 33 34ifneq ($(sub_make_done),1) 35 36# Do not use make's built-in rules and variables 37# (this increases performance and avoids hard-to-debug behaviour) 38MAKEFLAGS += -rR 39 40# Avoid funny character set dependencies 41unexport LC_ALL 42LC_COLLATE=C 43LC_NUMERIC=C 44export LC_COLLATE LC_NUMERIC 45 46# Avoid interference with shell env settings 47unexport GREP_OPTIONS 48 49# Beautify output 50# --------------------------------------------------------------------------- 51# 52# Normally, we echo the whole command before executing it. By making 53# that echo $($(quiet)$(cmd)), we now have the possibility to set 54# $(quiet) to choose other forms of output instead, e.g. 55# 56# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 57# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 58# 59# If $(quiet) is empty, the whole command will be printed. 60# If it is set to "quiet_", only the short version will be printed. 61# If it is set to "silent_", nothing will be printed at all, since 62# the variable $(silent_cmd_cc_o_c) doesn't exist. 63# 64# A simple variant is to prefix commands with $(Q) - that's useful 65# for commands that shall be hidden in non-verbose mode. 66# 67# $(Q)ln $@ :< 68# 69# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 70# If KBUILD_VERBOSE equals 1 then the above command is displayed. 71# 72# To put more focus on warnings, be less verbose as default 73# Use 'make V=1' to see the full commands 74 75ifeq ("$(origin V)", "command line") 76 KBUILD_VERBOSE = $(V) 77endif 78ifndef KBUILD_VERBOSE 79 KBUILD_VERBOSE = 0 80endif 81 82ifeq ($(KBUILD_VERBOSE),1) 83 quiet = 84 Q = 85else 86 quiet=quiet_ 87 Q = @ 88endif 89 90# If the user is running make -s (silent mode), suppress echoing of 91# commands 92 93ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) 94 quiet=silent_ 95endif 96 97export quiet Q KBUILD_VERBOSE 98 99# Kbuild will save output files in the current working directory. 100# This does not need to match to the root of the kernel source tree. 101# 102# For example, you can do this: 103# 104# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile 105# 106# If you want to save output files in a different location, there are 107# two syntaxes to specify it. 108# 109# 1) O= 110# Use "make O=dir/to/store/output/files/" 111# 112# 2) Set KBUILD_OUTPUT 113# Set the environment variable KBUILD_OUTPUT to point to the output directory. 114# export KBUILD_OUTPUT=dir/to/store/output/files/; make 115# 116# The O= assignment takes precedence over the KBUILD_OUTPUT environment 117# variable. 118 119# Do we want to change the working directory? 120ifeq ("$(origin O)", "command line") 121 KBUILD_OUTPUT := $(O) 122endif 123 124ifneq ($(KBUILD_OUTPUT),) 125# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot 126# expand a shell special character '~'. We use a somewhat tedious way here. 127abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) 128$(if $(abs_objtree),, \ 129 $(error failed to create output directory "$(KBUILD_OUTPUT)")) 130 131# $(realpath ...) resolves symlinks 132abs_objtree := $(realpath $(abs_objtree)) 133else 134abs_objtree := $(CURDIR) 135endif # ifneq ($(KBUILD_OUTPUT),) 136 137ifeq ($(abs_objtree),$(CURDIR)) 138# Suppress "Entering directory ..." unless we are changing the work directory. 139MAKEFLAGS += --no-print-directory 140else 141need-sub-make := 1 142endif 143 144abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) 145 146ifneq ($(words $(subst :, ,$(abs_srctree))), 1) 147$(error source directory cannot contain spaces or colons) 148endif 149 150ifneq ($(abs_srctree),$(abs_objtree)) 151# Look for make include files relative to root of kernel src 152# 153# This does not become effective immediately because MAKEFLAGS is re-parsed 154# once after the Makefile is read. We need to invoke sub-make. 155MAKEFLAGS += --include-dir=$(abs_srctree) 156need-sub-make := 1 157endif 158 159ifneq ($(filter 3.%,$(MAKE_VERSION)),) 160# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x 161# We need to invoke sub-make to avoid implicit rules in the top Makefile. 162need-sub-make := 1 163# Cancel implicit rules for this Makefile. 164$(lastword $(MAKEFILE_LIST)): ; 165endif 166 167export abs_srctree abs_objtree 168export sub_make_done := 1 169 170ifeq ($(need-sub-make),1) 171 172PHONY += $(MAKECMDGOALS) sub-make 173 174$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make 175 @: 176 177# Invoke a second make in the output directory, passing relevant variables 178sub-make: 179 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) 180 181endif # need-sub-make 182endif # sub_make_done 183 184# We process the rest of the Makefile if this is the final invocation of make 185ifeq ($(need-sub-make),) 186 187# Do not print "Entering directory ...", 188# but we want to display it when entering to the output directory 189# so that IDEs/editors are able to understand relative filenames. 190MAKEFLAGS += --no-print-directory 191 192# Call a source code checker (by default, "sparse") as part of the 193# C compilation. 194# 195# Use 'make C=1' to enable checking of only re-compiled files. 196# Use 'make C=2' to enable checking of *all* source files, regardless 197# of whether they are re-compiled or not. 198# 199# See the file "Documentation/dev-tools/sparse.rst" for more details, 200# including where to get the "sparse" utility. 201 202ifeq ("$(origin C)", "command line") 203 KBUILD_CHECKSRC = $(C) 204endif 205ifndef KBUILD_CHECKSRC 206 KBUILD_CHECKSRC = 0 207endif 208 209# Use make M=dir to specify directory of external module to build 210# Old syntax make ... SUBDIRS=$PWD is still supported 211# Setting the environment variable KBUILD_EXTMOD take precedence 212ifdef SUBDIRS 213 $(warning ================= WARNING ================) 214 $(warning 'SUBDIRS' will be removed after Linux 5.3) 215 $(warning ) 216 $(warning If you are building an individual subdirectory) 217 $(warning in the kernel tree, you can do like this:) 218 $(warning $$ make path/to/dir/you/want/to/build/) 219 $(warning (Do not forget the trailing slash)) 220 $(warning ) 221 $(warning If you are building an external module,) 222 $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead) 223 $(warning ==========================================) 224 KBUILD_EXTMOD ?= $(SUBDIRS) 225endif 226 227ifeq ("$(origin M)", "command line") 228 KBUILD_EXTMOD := $(M) 229endif 230 231ifeq ($(abs_srctree),$(abs_objtree)) 232 # building in the source tree 233 srctree := . 234else 235 ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) 236 # building in a subdirectory of the source tree 237 srctree := .. 238 else 239 srctree := $(abs_srctree) 240 endif 241 242 # TODO: 243 # KBUILD_SRC is only used to distinguish in-tree/out-of-tree build. 244 # Replace it with $(srctree) or something. 245 KBUILD_SRC := $(abs_srctree) 246endif 247 248export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC 249 250objtree := . 251src := $(srctree) 252obj := $(objtree) 253 254VPATH := $(srctree) 255 256export srctree objtree VPATH 257 258# To make sure we do not include .config for any of the *config targets 259# catch them early, and hand them over to scripts/kconfig/Makefile 260# It is allowed to specify more targets when calling make, including 261# mixing *config targets and build targets. 262# For example 'make oldconfig all'. 263# Detect when mixed targets is specified, and make a second invocation 264# of make so .config is not included in this case either (for *config). 265 266version_h := include/generated/uapi/linux/version.h 267old_version_h := include/linux/version.h 268 269clean-targets := %clean mrproper cleandocs 270no-dot-config-targets := $(clean-targets) \ 271 cscope gtags TAGS tags help% %docs check% coccicheck \ 272 $(version_h) headers headers_% archheaders archscripts \ 273 %asm-generic kernelversion %src-pkg 274no-sync-config-targets := $(no-dot-config-targets) install %install \ 275 kernelrelease 276 277config-targets := 0 278mixed-targets := 0 279dot-config := 1 280may-sync-config := 1 281 282ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 283 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 284 dot-config := 0 285 endif 286endif 287 288ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) 289 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) 290 may-sync-config := 0 291 endif 292endif 293 294ifneq ($(KBUILD_EXTMOD),) 295 may-sync-config := 0 296endif 297 298ifeq ($(KBUILD_EXTMOD),) 299 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 300 config-targets := 1 301 ifneq ($(words $(MAKECMDGOALS)),1) 302 mixed-targets := 1 303 endif 304 endif 305endif 306 307# For "make -j clean all", "make -j mrproper defconfig all", etc. 308ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) 309 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) 310 mixed-targets := 1 311 endif 312endif 313 314# install and modules_install need also be processed one by one 315ifneq ($(filter install,$(MAKECMDGOALS)),) 316 ifneq ($(filter modules_install,$(MAKECMDGOALS)),) 317 mixed-targets := 1 318 endif 319endif 320 321ifeq ($(mixed-targets),1) 322# =========================================================================== 323# We're called with mixed targets (*config and build targets). 324# Handle them one by one. 325 326PHONY += $(MAKECMDGOALS) __build_one_by_one 327 328$(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one 329 @: 330 331__build_one_by_one: 332 $(Q)set -e; \ 333 for i in $(MAKECMDGOALS); do \ 334 $(MAKE) -f $(srctree)/Makefile $$i; \ 335 done 336 337else 338 339include scripts/Kbuild.include 340 341# Read KERNELRELEASE from include/config/kernel.release (if it exists) 342KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 343KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) 344export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 345 346include scripts/subarch.include 347 348# Cross compiling and selecting different set of gcc/bin-utils 349# --------------------------------------------------------------------------- 350# 351# When performing cross compilation for other architectures ARCH shall be set 352# to the target architecture. (See arch/* for the possibilities). 353# ARCH can be set during invocation of make: 354# make ARCH=ia64 355# Another way is to have ARCH set in the environment. 356# The default ARCH is the host where make is executed. 357 358# CROSS_COMPILE specify the prefix used for all executables used 359# during compilation. Only gcc and related bin-utils executables 360# are prefixed with $(CROSS_COMPILE). 361# CROSS_COMPILE can be set on the command line 362# make CROSS_COMPILE=ia64-linux- 363# Alternatively CROSS_COMPILE can be set in the environment. 364# Default value for CROSS_COMPILE is not to prefix executables 365# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 366ARCH ?= $(SUBARCH) 367 368# Architecture as present in compile.h 369UTS_MACHINE := $(ARCH) 370SRCARCH := $(ARCH) 371 372# Additional ARCH settings for x86 373ifeq ($(ARCH),i386) 374 SRCARCH := x86 375endif 376ifeq ($(ARCH),x86_64) 377 SRCARCH := x86 378endif 379 380# Additional ARCH settings for sparc 381ifeq ($(ARCH),sparc32) 382 SRCARCH := sparc 383endif 384ifeq ($(ARCH),sparc64) 385 SRCARCH := sparc 386endif 387 388# Additional ARCH settings for sh 389ifeq ($(ARCH),sh64) 390 SRCARCH := sh 391endif 392 393KCONFIG_CONFIG ?= .config 394export KCONFIG_CONFIG 395 396# SHELL used by kbuild 397CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 398 else if [ -x /bin/bash ]; then echo /bin/bash; \ 399 else echo sh; fi ; fi) 400 401HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) 402HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) 403HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) 404 405HOSTCC = gcc 406HOSTCXX = g++ 407KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ 408 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ 409 $(HOSTCFLAGS) 410KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) 411KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) 412KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) 413 414# Make variables (CC, etc...) 415AS = $(CROSS_COMPILE)as 416LD = $(CROSS_COMPILE)ld 417CC = $(CROSS_COMPILE)gcc 418CPP = $(CC) -E 419AR = $(CROSS_COMPILE)ar 420NM = $(CROSS_COMPILE)nm 421STRIP = $(CROSS_COMPILE)strip 422OBJCOPY = $(CROSS_COMPILE)objcopy 423OBJDUMP = $(CROSS_COMPILE)objdump 424PAHOLE = pahole 425LEX = flex 426YACC = bison 427AWK = awk 428INSTALLKERNEL := installkernel 429DEPMOD = /sbin/depmod 430PERL = perl 431PYTHON = python 432PYTHON2 = python2 433PYTHON3 = python3 434CHECK = sparse 435 436CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 437 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) 438NOSTDINC_FLAGS := 439CFLAGS_MODULE = 440AFLAGS_MODULE = 441LDFLAGS_MODULE = 442CFLAGS_KERNEL = 443AFLAGS_KERNEL = 444LDFLAGS_vmlinux = 445 446# Use USERINCLUDE when you must reference the UAPI directories only. 447USERINCLUDE := \ 448 -I$(srctree)/arch/$(SRCARCH)/include/uapi \ 449 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ 450 -I$(srctree)/include/uapi \ 451 -I$(objtree)/include/generated/uapi \ 452 -include $(srctree)/include/linux/kconfig.h 453 454# Use LINUXINCLUDE when you must reference the include/ directory. 455# Needed to be compatible with the O= option 456LINUXINCLUDE := \ 457 -I$(srctree)/arch/$(SRCARCH)/include \ 458 -I$(objtree)/arch/$(SRCARCH)/include/generated \ 459 $(if $(filter .,$(srctree)),,-I$(srctree)/include) \ 460 -I$(objtree)/include \ 461 $(USERINCLUDE) 462 463KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE 464KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ 465 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ 466 -Werror=implicit-function-declaration -Werror=implicit-int \ 467 -Wno-format-security \ 468 -std=gnu89 469KBUILD_CPPFLAGS := -D__KERNEL__ 470KBUILD_AFLAGS_KERNEL := 471KBUILD_CFLAGS_KERNEL := 472KBUILD_AFLAGS_MODULE := -DMODULE 473KBUILD_CFLAGS_MODULE := -DMODULE 474KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds 475KBUILD_LDFLAGS := 476GCC_PLUGINS_CFLAGS := 477 478export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC 479export CPP AR NM STRIP OBJCOPY OBJDUMP PAHOLE KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS 480export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE 481export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 482 483export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS 484export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 485export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN 486export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 487export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE 488export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL 489export KBUILD_ARFLAGS 490 491# When compiling out-of-tree modules, put MODVERDIR in the module 492# tree rather than in the kernel tree. The kernel tree might 493# even be read-only. 494export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 495 496# Files to ignore in find ... statements 497 498export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ 499 -name CVS -o -name .pc -o -name .hg -o -name .git \) \ 500 -prune -o 501export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ 502 --exclude CVS --exclude .pc --exclude .hg --exclude .git 503 504# =========================================================================== 505# Rules shared between *config targets and build targets 506 507# Basic helpers built in scripts/basic/ 508PHONY += scripts_basic 509scripts_basic: 510 $(Q)$(MAKE) $(build)=scripts/basic 511 $(Q)rm -f .tmp_quiet_recordmcount 512 513PHONY += outputmakefile 514# outputmakefile generates a Makefile in the output directory, if using a 515# separate output directory. This allows convenient use of make in the 516# output directory. 517# At the same time when output Makefile generated, generate .gitignore to 518# ignore whole output directory 519outputmakefile: 520ifneq ($(srctree),.) 521 $(Q)ln -fsn $(srctree) source 522 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) 523 $(Q)test -e .gitignore || \ 524 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore 525endif 526 527ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) 528ifneq ($(CROSS_COMPILE),) 529CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) 530GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) 531CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) 532GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) 533endif 534ifneq ($(GCC_TOOLCHAIN),) 535CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) 536endif 537ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),) 538CLANG_FLAGS += -no-integrated-as 539endif 540CLANG_FLAGS += -Werror=unknown-warning-option 541KBUILD_CFLAGS += $(CLANG_FLAGS) 542KBUILD_AFLAGS += $(CLANG_FLAGS) 543export CLANG_FLAGS 544endif 545 546# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. 547# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. 548# CC_VERSION_TEXT is referenced from Kconfig (so it needs export), 549# and from include/config/auto.conf.cmd to detect the compiler upgrade. 550CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1) 551 552ifeq ($(config-targets),1) 553# =========================================================================== 554# *config targets only - make sure prerequisites are updated, and descend 555# in scripts/kconfig to make the *config target 556 557# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 558# KBUILD_DEFCONFIG may point out an alternative default configuration 559# used for 'make defconfig' 560include arch/$(SRCARCH)/Makefile 561export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT 562 563config: scripts_basic outputmakefile FORCE 564 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 565 566%config: scripts_basic outputmakefile FORCE 567 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 568 569else 570# =========================================================================== 571# Build targets only - this includes vmlinux, arch specific targets, clean 572# targets and others. In general all targets except *config targets. 573 574# If building an external module we do not care about the all: rule 575# but instead _all depend on modules 576PHONY += all 577ifeq ($(KBUILD_EXTMOD),) 578_all: all 579else 580_all: modules 581endif 582 583# Decide whether to build built-in, modular, or both. 584# Normally, just do built-in. 585 586KBUILD_MODULES := 587KBUILD_BUILTIN := 1 588 589# If we have only "make modules", don't compile built-in objects. 590# When we're building modules with modversions, we need to consider 591# the built-in objects during the descend as well, in order to 592# make sure the checksums are up to date before we record them. 593 594ifeq ($(MAKECMDGOALS),modules) 595 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 596endif 597 598# If we have "make <whatever> modules", compile modules 599# in addition to whatever we do anyway. 600# Just "make" or "make all" shall build modules as well 601 602ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 603 KBUILD_MODULES := 1 604endif 605 606ifeq ($(MAKECMDGOALS),) 607 KBUILD_MODULES := 1 608endif 609 610export KBUILD_MODULES KBUILD_BUILTIN 611 612ifeq ($(dot-config),1) 613include include/config/auto.conf 614endif 615 616ifeq ($(KBUILD_EXTMOD),) 617# Objects we will link into vmlinux / subdirs we need to visit 618init-y := init/ 619drivers-y := drivers/ sound/ 620drivers-$(CONFIG_SAMPLES) += samples/ 621net-y := net/ 622libs-y := lib/ 623core-y := usr/ 624virt-y := virt/ 625endif # KBUILD_EXTMOD 626 627# The all: target is the default when no target is given on the 628# command line. 629# This allow a user to issue only 'make' to build a kernel including modules 630# Defaults to vmlinux, but the arch makefile usually adds further targets 631all: vmlinux 632 633CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ 634 $(call cc-option,-fno-tree-loop-im) \ 635 $(call cc-disable-warning,maybe-uninitialized,) 636export CFLAGS_GCOV 637 638# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. 639ifdef CONFIG_FUNCTION_TRACER 640 CC_FLAGS_FTRACE := -pg 641endif 642 643RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register 644RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register 645RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk 646RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline 647RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) 648RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) 649export RETPOLINE_CFLAGS 650export RETPOLINE_VDSO_CFLAGS 651 652# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default 653# values of the respective KBUILD_* variables 654ARCH_CPPFLAGS := 655ARCH_AFLAGS := 656ARCH_CFLAGS := 657include arch/$(SRCARCH)/Makefile 658 659ifeq ($(dot-config),1) 660ifeq ($(may-sync-config),1) 661# Read in dependencies to all Kconfig* files, make sure to run syncconfig if 662# changes are detected. This should be included after arch/$(SRCARCH)/Makefile 663# because some architectures define CROSS_COMPILE there. 664include include/config/auto.conf.cmd 665 666$(KCONFIG_CONFIG): 667 @echo >&2 '***' 668 @echo >&2 '*** Configuration file "$@" not found!' 669 @echo >&2 '***' 670 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' 671 @echo >&2 '*** "make menuconfig" or "make xconfig").' 672 @echo >&2 '***' 673 @/bin/false 674 675# The actual configuration files used during the build are stored in 676# include/generated/ and include/config/. Update them if .config is newer than 677# include/config/auto.conf (which mirrors .config). 678# 679# This exploits the 'multi-target pattern rule' trick. 680# The syncconfig should be executed only once to make all the targets. 681%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG) 682 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig 683else 684# External modules and some install targets need include/generated/autoconf.h 685# and include/config/auto.conf but do not care if they are up-to-date. 686# Use auto.conf to trigger the test 687PHONY += include/config/auto.conf 688 689include/config/auto.conf: 690 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ 691 echo >&2; \ 692 echo >&2 " ERROR: Kernel configuration is invalid."; \ 693 echo >&2 " include/generated/autoconf.h or $@ are missing.";\ 694 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 695 echo >&2 ; \ 696 /bin/false) 697 698endif # may-sync-config 699endif # $(dot-config) 700 701KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) 702KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) 703KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) 704KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) 705KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 706 707ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 708KBUILD_CFLAGS += -Os 709else 710KBUILD_CFLAGS += -O2 711endif 712 713ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED 714KBUILD_CFLAGS += -Wno-maybe-uninitialized 715endif 716 717# Tell gcc to never replace conditional load with a non-conditional one 718KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) 719 720include scripts/Makefile.kcov 721include scripts/Makefile.gcc-plugins 722 723ifdef CONFIG_READABLE_ASM 724# Disable optimizations that make assembler listings hard to read. 725# reorder blocks reorders the control in the function 726# ipa clone creates specialized cloned functions 727# partial inlining inlines only parts of functions 728KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ 729 $(call cc-option,-fno-ipa-cp-clone,) \ 730 $(call cc-option,-fno-partial-inlining) 731endif 732 733ifneq ($(CONFIG_FRAME_WARN),0) 734KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) 735endif 736 737stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector 738stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector 739stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong 740 741KBUILD_CFLAGS += $(stackp-flags-y) 742 743ifdef CONFIG_CC_IS_CLANG 744KBUILD_CPPFLAGS += -Qunused-arguments 745KBUILD_CFLAGS += -Wno-format-invalid-specifier 746KBUILD_CFLAGS += -Wno-gnu 747# Quiet clang warning: comparison of unsigned expression < 0 is always false 748KBUILD_CFLAGS += -Wno-tautological-compare 749# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the 750# source of a reference will be _MergedGlobals and not on of the whitelisted names. 751# See modpost pattern 2 752KBUILD_CFLAGS += -mno-global-merge 753else 754 755# These warnings generated too much noise in a regular build. 756# Use make W=1 to enable them (see scripts/Makefile.extrawarn) 757KBUILD_CFLAGS += -Wno-unused-but-set-variable 758endif 759 760KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) 761ifdef CONFIG_FRAME_POINTER 762KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 763else 764# Some targets (ARM with Thumb2, for example), can't be built with frame 765# pointers. For those, we don't have FUNCTION_TRACER automatically 766# select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is 767# incompatible with -fomit-frame-pointer with current GCC, so we don't use 768# -fomit-frame-pointer with FUNCTION_TRACER. 769ifndef CONFIG_FUNCTION_TRACER 770KBUILD_CFLAGS += -fomit-frame-pointer 771endif 772endif 773 774# Initialize all stack variables with a pattern, if desired. 775ifdef CONFIG_INIT_STACK_ALL 776KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern 777endif 778 779DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) 780 781ifdef CONFIG_DEBUG_INFO 782ifdef CONFIG_DEBUG_INFO_SPLIT 783DEBUG_CFLAGS += -gsplit-dwarf 784else 785DEBUG_CFLAGS += -g 786endif 787KBUILD_AFLAGS += -Wa,-gdwarf-2 788endif 789ifdef CONFIG_DEBUG_INFO_DWARF4 790DEBUG_CFLAGS += -gdwarf-4 791endif 792 793ifdef CONFIG_DEBUG_INFO_REDUCED 794DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ 795 $(call cc-option,-fno-var-tracking) 796endif 797 798KBUILD_CFLAGS += $(DEBUG_CFLAGS) 799export DEBUG_CFLAGS 800 801ifdef CONFIG_FUNCTION_TRACER 802ifdef CONFIG_FTRACE_MCOUNT_RECORD 803 # gcc 5 supports generating the mcount tables directly 804 ifeq ($(call cc-option-yn,-mrecord-mcount),y) 805 CC_FLAGS_FTRACE += -mrecord-mcount 806 export CC_USING_RECORD_MCOUNT := 1 807 endif 808 ifdef CONFIG_HAVE_NOP_MCOUNT 809 ifeq ($(call cc-option-yn, -mnop-mcount),y) 810 CC_FLAGS_FTRACE += -mnop-mcount 811 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT 812 endif 813 endif 814endif 815ifdef CONFIG_HAVE_FENTRY 816 ifeq ($(call cc-option-yn, -mfentry),y) 817 CC_FLAGS_FTRACE += -mfentry 818 CC_FLAGS_USING += -DCC_USING_FENTRY 819 endif 820endif 821export CC_FLAGS_FTRACE 822KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) 823KBUILD_AFLAGS += $(CC_FLAGS_USING) 824ifdef CONFIG_DYNAMIC_FTRACE 825 ifdef CONFIG_HAVE_C_RECORDMCOUNT 826 BUILD_C_RECORDMCOUNT := y 827 export BUILD_C_RECORDMCOUNT 828 endif 829endif 830endif 831 832# We trigger additional mismatches with less inlining 833ifdef CONFIG_DEBUG_SECTION_MISMATCH 834KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) 835endif 836 837ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION 838KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections 839LDFLAGS_vmlinux += --gc-sections 840endif 841 842ifdef CONFIG_LIVEPATCH 843KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone) 844endif 845 846# arch Makefile may override CC so keep this after arch Makefile is included 847NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 848 849# warn about C99 declaration after statement 850KBUILD_CFLAGS += -Wdeclaration-after-statement 851 852# Variable Length Arrays (VLAs) should not be used anywhere in the kernel 853KBUILD_CFLAGS += -Wvla 854 855# disable pointer signed / unsigned warnings in gcc 4.0 856KBUILD_CFLAGS += -Wno-pointer-sign 857 858# disable stringop warnings in gcc 8+ 859KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) 860 861# disable invalid "can't wrap" optimizations for signed / pointers 862KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) 863 864# clang sets -fmerge-all-constants by default as optimization, but this 865# is non-conforming behavior for C and in fact breaks the kernel, so we 866# need to disable it here generally. 867KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) 868 869# for gcc -fno-merge-all-constants disables everything, but it is fine 870# to have actual conforming behavior enabled. 871KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) 872 873# Make sure -fstack-check isn't enabled (like gentoo apparently did) 874KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) 875 876# conserve stack if available 877KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) 878 879# Prohibit date/time macros, which would make the build non-deterministic 880KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) 881 882# enforce correct pointer usage 883KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 884 885# Require designated initializers for all marked structures 886KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) 887 888# change __FILE__ to the relative path from the srctree 889KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 890 891# use the deterministic mode of AR if available 892KBUILD_ARFLAGS := $(call ar-option,D) 893 894include scripts/Makefile.kasan 895include scripts/Makefile.extrawarn 896include scripts/Makefile.ubsan 897 898# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the 899# last assignments 900KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS) 901KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS) 902KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS) 903 904# Use --build-id when available. 905LDFLAGS_BUILD_ID := $(call ld-option, --build-id) 906KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 907LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 908 909ifeq ($(CONFIG_STRIP_ASM_SYMS),y) 910LDFLAGS_vmlinux += $(call ld-option, -X,) 911endif 912 913# insure the checker run with the right endianness 914CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) 915 916# the checker needs the correct machine size 917CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) 918 919# Default kernel image to build when no specific target is given. 920# KBUILD_IMAGE may be overruled on the command line or 921# set in the environment 922# Also any assignments in arch/$(ARCH)/Makefile take precedence over 923# this default value 924export KBUILD_IMAGE ?= vmlinux 925 926# 927# INSTALL_PATH specifies where to place the updated kernel and system map 928# images. Default is /boot, but you can set it to other values 929export INSTALL_PATH ?= /boot 930 931# 932# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. 933# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as 934# an argument if needed. Otherwise it defaults to the kernel install path 935# 936export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) 937 938# 939# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 940# relocations required by build roots. This is not defined in the 941# makefile but the argument can be passed to make if needed. 942# 943 944MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 945export MODLIB 946 947# 948# INSTALL_MOD_STRIP, if defined, will cause modules to be 949# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 950# the default option --strip-debug will be used. Otherwise, 951# INSTALL_MOD_STRIP value will be used as the options to the strip command. 952 953ifdef INSTALL_MOD_STRIP 954ifeq ($(INSTALL_MOD_STRIP),1) 955mod_strip_cmd = $(STRIP) --strip-debug 956else 957mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 958endif # INSTALL_MOD_STRIP=1 959else 960mod_strip_cmd = true 961endif # INSTALL_MOD_STRIP 962export mod_strip_cmd 963 964# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed 965# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP 966# or CONFIG_MODULE_COMPRESS_XZ. 967 968mod_compress_cmd = true 969ifdef CONFIG_MODULE_COMPRESS 970 ifdef CONFIG_MODULE_COMPRESS_GZIP 971 mod_compress_cmd = gzip -n -f 972 endif # CONFIG_MODULE_COMPRESS_GZIP 973 ifdef CONFIG_MODULE_COMPRESS_XZ 974 mod_compress_cmd = xz -f 975 endif # CONFIG_MODULE_COMPRESS_XZ 976endif # CONFIG_MODULE_COMPRESS 977export mod_compress_cmd 978 979ifdef CONFIG_MODULE_SIG_ALL 980$(eval $(call config_filename,MODULE_SIG_KEY)) 981 982mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 983else 984mod_sign_cmd = true 985endif 986export mod_sign_cmd 987 988HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) 989 990ifdef CONFIG_STACK_VALIDATION 991 has_libelf := $(call try-run,\ 992 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) 993 ifeq ($(has_libelf),1) 994 objtool_target := tools/objtool FORCE 995 else 996 SKIP_STACK_VALIDATION := 1 997 export SKIP_STACK_VALIDATION 998 endif 999endif 1000 1001PHONY += prepare0 1002 1003ifeq ($(KBUILD_EXTMOD),) 1004core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ 1005 1006vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 1007 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 1008 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) 1009 1010vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ 1011 $(patsubst %/,%,$(filter %/, $(init-) $(core-) \ 1012 $(drivers-) $(net-) $(libs-) $(virt-)))) 1013 1014init-y := $(patsubst %/, %/built-in.a, $(init-y)) 1015core-y := $(patsubst %/, %/built-in.a, $(core-y)) 1016drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) 1017net-y := $(patsubst %/, %/built-in.a, $(net-y)) 1018libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 1019libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) 1020virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) 1021 1022# Externally visible symbols (used by link-vmlinux.sh) 1023export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ 1024 $(drivers-y) $(net-y) $(virt-y) 1025export KBUILD_VMLINUX_LIBS := $(libs-y1) 1026export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds 1027export LDFLAGS_vmlinux 1028# used by scripts/package/Makefile 1029export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) 1030 1031vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) 1032 1033# Recurse until adjust_autoksyms.sh is satisfied 1034PHONY += autoksyms_recursive 1035autoksyms_recursive: $(vmlinux-deps) 1036ifdef CONFIG_TRIM_UNUSED_KSYMS 1037 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ 1038 "$(MAKE) -f $(srctree)/Makefile vmlinux" 1039endif 1040 1041# For the kernel to actually contain only the needed exported symbols, 1042# we have to build modules as well to determine what those symbols are. 1043# (this can be evaluated only once include/config/auto.conf has been included) 1044ifdef CONFIG_TRIM_UNUSED_KSYMS 1045 KBUILD_MODULES := 1 1046endif 1047 1048autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) 1049 1050$(autoksyms_h): 1051 $(Q)mkdir -p $(dir $@) 1052 $(Q)touch $@ 1053 1054ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) 1055 1056# Final link of vmlinux with optional arch pass after final link 1057cmd_link-vmlinux = \ 1058 $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ 1059 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) 1060 1061vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE 1062 +$(call if_changed,link-vmlinux) 1063 1064targets := vmlinux 1065 1066# The actual objects are generated when descending, 1067# make sure no implicit rule kicks in 1068$(sort $(vmlinux-deps)): $(vmlinux-dirs) ; 1069 1070# Handle descending into subdirectories listed in $(vmlinux-dirs) 1071# Preset locale variables to speed up the build process. Limit locale 1072# tweaks to this spot to avoid wrong language settings when running 1073# make menuconfig etc. 1074# Error messages still appears in the original language 1075 1076PHONY += $(vmlinux-dirs) 1077$(vmlinux-dirs): prepare 1078 $(Q)$(MAKE) $(build)=$@ need-builtin=1 1079 1080filechk_kernel.release = \ 1081 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1082 1083# Store (new) KERNELRELEASE string in include/config/kernel.release 1084include/config/kernel.release: FORCE 1085 $(call filechk,kernel.release) 1086 1087# Additional helpers built in scripts/ 1088# Carefully list dependencies so we do not try to build scripts twice 1089# in parallel 1090PHONY += scripts 1091scripts: scripts_basic scripts_dtc 1092 $(Q)$(MAKE) $(build)=$(@) 1093 1094# Things we need to do before we recursively start building the kernel 1095# or the modules are listed in "prepare". 1096# A multi level approach is used. prepareN is processed before prepareN-1. 1097# archprepare is used in arch Makefiles and when processed asm symlink, 1098# version.h and scripts_basic is processed / created. 1099 1100PHONY += prepare archprepare prepare1 prepare3 1101 1102# prepare3 is used to check if we are building in a separate output directory, 1103# and if so do: 1104# 1) Check that make has not been executed in the kernel src $(srctree) 1105prepare3: include/config/kernel.release 1106ifneq ($(srctree),.) 1107 @$(kecho) ' Using $(srctree) as source for kernel' 1108 $(Q)if [ -f $(srctree)/.config -o \ 1109 -d $(srctree)/include/config -o \ 1110 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \ 1111 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ 1112 echo >&2 " in the '$(srctree)' directory.";\ 1113 /bin/false; \ 1114 fi; 1115endif 1116 1117prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \ 1118 include/generated/utsrelease.h 1119 $(cmd_crmodverdir) 1120 1121archprepare: archheaders archscripts prepare1 scripts 1122 1123prepare0: archprepare 1124 $(Q)$(MAKE) $(build)=scripts/mod 1125 $(Q)$(MAKE) $(build)=. 1126 1127# All the preparing.. 1128prepare: prepare0 prepare-objtool 1129 1130# Support for using generic headers in asm-generic 1131asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj 1132 1133PHONY += asm-generic uapi-asm-generic 1134asm-generic: uapi-asm-generic 1135 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ 1136 generic=include/asm-generic 1137uapi-asm-generic: 1138 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ 1139 generic=include/uapi/asm-generic 1140 1141PHONY += prepare-objtool 1142prepare-objtool: $(objtool_target) 1143ifeq ($(SKIP_STACK_VALIDATION),1) 1144ifdef CONFIG_UNWINDER_ORC 1145 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1146 @false 1147else 1148 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 1149endif 1150endif 1151 1152# Generate some files 1153# --------------------------------------------------------------------------- 1154 1155# KERNELRELEASE can change from a few different places, meaning version.h 1156# needs to be updated, so this check is forced on all builds 1157 1158uts_len := 64 1159define filechk_utsrelease.h 1160 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 1161 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 1162 exit 1; \ 1163 fi; \ 1164 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" 1165endef 1166 1167define filechk_version.h 1168 echo \#define LINUX_VERSION_CODE $(shell \ 1169 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ 1170 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))' 1171endef 1172 1173$(version_h): FORCE 1174 $(call filechk,version.h) 1175 $(Q)rm -f $(old_version_h) 1176 1177include/generated/utsrelease.h: include/config/kernel.release FORCE 1178 $(call filechk,utsrelease.h) 1179 1180PHONY += headerdep 1181headerdep: 1182 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ 1183 $(srctree)/scripts/headerdep.pl -I$(srctree)/include 1184 1185# --------------------------------------------------------------------------- 1186# Kernel headers 1187 1188#Default location for installed headers 1189export INSTALL_HDR_PATH = $(objtree)/usr 1190 1191quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include 1192 cmd_headers_install = \ 1193 mkdir -p $(INSTALL_HDR_PATH); \ 1194 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ 1195 usr/include $(INSTALL_HDR_PATH) 1196 1197PHONY += headers_install 1198headers_install: headers 1199 $(call cmd,headers_install) 1200 1201PHONY += archheaders archscripts 1202 1203hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj 1204 1205PHONY += headers 1206headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 1207 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 1208 $(error Headers not exportable for the $(SRCARCH) architecture)) 1209 $(Q)$(MAKE) $(hdr-inst)=include/uapi 1210 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1211 1212PHONY += headers_check 1213headers_check: headers 1214 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1 1215 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1 1216 1217ifdef CONFIG_HEADERS_INSTALL 1218prepare: headers 1219endif 1220 1221ifdef CONFIG_HEADERS_CHECK 1222all: headers_check 1223endif 1224 1225PHONY += scripts_unifdef 1226scripts_unifdef: scripts_basic 1227 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 1228 1229# --------------------------------------------------------------------------- 1230# Kernel selftest 1231 1232PHONY += kselftest 1233kselftest: 1234 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests 1235 1236PHONY += kselftest-clean 1237kselftest-clean: 1238 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean 1239 1240PHONY += kselftest-merge 1241kselftest-merge: 1242 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) 1243 $(Q)find $(srctree)/tools/testing/selftests -name config | \ 1244 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config 1245 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 1246 1247# --------------------------------------------------------------------------- 1248# Devicetree files 1249 1250ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) 1251dtstree := arch/$(SRCARCH)/boot/dts 1252endif 1253 1254ifneq ($(dtstree),) 1255 1256%.dtb: prepare3 scripts_dtc 1257 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ 1258 1259PHONY += dtbs dtbs_install dt_binding_check 1260dtbs dtbs_check: prepare3 scripts_dtc 1261 $(Q)$(MAKE) $(build)=$(dtstree) 1262 1263dtbs_check: export CHECK_DTBS=1 1264dtbs_check: dt_binding_check 1265 1266dtbs_install: 1267 $(Q)$(MAKE) $(dtbinst)=$(dtstree) 1268 1269ifdef CONFIG_OF_EARLY_FLATTREE 1270all: dtbs 1271endif 1272 1273endif 1274 1275PHONY += scripts_dtc 1276scripts_dtc: scripts_basic 1277 $(Q)$(MAKE) $(build)=scripts/dtc 1278 1279dt_binding_check: scripts_dtc 1280 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings 1281 1282# --------------------------------------------------------------------------- 1283# Modules 1284 1285ifdef CONFIG_MODULES 1286 1287# By default, build modules as well 1288 1289all: modules 1290 1291# Build modules 1292# 1293# A module can be listed more than once in obj-m resulting in 1294# duplicate lines in modules.order files. Those are removed 1295# using awk while concatenating to the final file. 1296 1297PHONY += modules 1298modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin 1299 @$(kecho) ' Building modules, stage 2.'; 1300 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1301 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh 1302 1303modules.order: $(vmlinux-dirs) 1304 $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@ 1305 1306modbuiltin-dirs := $(addprefix _modbuiltin_, $(vmlinux-dirs)) 1307 1308modules.builtin: $(modbuiltin-dirs) 1309 $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@ 1310 1311PHONY += $(modbuiltin-dirs) 1312# tristate.conf is not included from this Makefile. Add it as a prerequisite 1313# here to make it self-healing in case somebody accidentally removes it. 1314$(modbuiltin-dirs): include/config/tristate.conf 1315 $(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@) 1316 1317# Target to prepare building external modules 1318PHONY += modules_prepare 1319modules_prepare: prepare 1320 1321# Target to install modules 1322PHONY += modules_install 1323modules_install: _modinst_ _modinst_post 1324 1325PHONY += _modinst_ 1326_modinst_: 1327 @rm -rf $(MODLIB)/kernel 1328 @rm -f $(MODLIB)/source 1329 @mkdir -p $(MODLIB)/kernel 1330 @ln -s $(abspath $(srctree)) $(MODLIB)/source 1331 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1332 rm -f $(MODLIB)/build ; \ 1333 ln -s $(CURDIR) $(MODLIB)/build ; \ 1334 fi 1335 @cp -f $(objtree)/modules.order $(MODLIB)/ 1336 @cp -f $(objtree)/modules.builtin $(MODLIB)/ 1337 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ 1338 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1339 1340# This depmod is only for convenience to give the initial 1341# boot a modules.dep even before / is mounted read-write. However the 1342# boot script depmod is the master version. 1343PHONY += _modinst_post 1344_modinst_post: _modinst_ 1345 $(call cmd,depmod) 1346 1347ifeq ($(CONFIG_MODULE_SIG), y) 1348PHONY += modules_sign 1349modules_sign: 1350 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign 1351endif 1352 1353else # CONFIG_MODULES 1354 1355# Modules not configured 1356# --------------------------------------------------------------------------- 1357 1358PHONY += modules modules_install 1359modules modules_install: 1360 @echo >&2 1361 @echo >&2 "The present kernel configuration has modules disabled." 1362 @echo >&2 "Type 'make config' and enable loadable module support." 1363 @echo >&2 "Then build a kernel with module support enabled." 1364 @echo >&2 1365 @exit 1 1366 1367endif # CONFIG_MODULES 1368 1369### 1370# Cleaning is done on three levels. 1371# make clean Delete most generated files 1372# Leave enough to build external modules 1373# make mrproper Delete the current configuration, and all generated files 1374# make distclean Remove editor backup files, patch leftover files and the like 1375 1376# Directories & files removed with 'make clean' 1377CLEAN_DIRS += $(MODVERDIR) include/ksym 1378CLEAN_FILES += modules.builtin.modinfo 1379 1380# Directories & files removed with 'make mrproper' 1381MRPROPER_DIRS += include/config include/generated \ 1382 arch/$(SRCARCH)/include/generated .tmp_objdiff 1383MRPROPER_FILES += .config .config.old .version \ 1384 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ 1385 signing_key.pem signing_key.priv signing_key.x509 \ 1386 x509.genkey extra_certificates signing_key.x509.keyid \ 1387 signing_key.x509.signer vmlinux-gdb.py 1388 1389# clean - Delete most, but leave enough to build external modules 1390# 1391clean: rm-dirs := $(CLEAN_DIRS) 1392clean: rm-files := $(CLEAN_FILES) 1393clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs)) 1394 1395PHONY += $(clean-dirs) clean archclean vmlinuxclean 1396$(clean-dirs): 1397 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1398 1399vmlinuxclean: 1400 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean 1401 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) 1402 1403clean: archclean vmlinuxclean 1404 1405# mrproper - Delete all generated files, including .config 1406# 1407mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1408mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1409mrproper-dirs := $(addprefix _mrproper_,scripts) 1410 1411PHONY += $(mrproper-dirs) mrproper 1412$(mrproper-dirs): 1413 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1414 1415mrproper: clean $(mrproper-dirs) 1416 $(call cmd,rmdirs) 1417 $(call cmd,rmfiles) 1418 1419# distclean 1420# 1421PHONY += distclean 1422 1423distclean: mrproper 1424 @find $(srctree) $(RCS_FIND_IGNORE) \ 1425 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1426 -o -name '*.bak' -o -name '#*#' -o -name '*%' \ 1427 -o -name 'core' \) \ 1428 -type f -print | xargs rm -f 1429 1430 1431# Packaging of the kernel to various formats 1432# --------------------------------------------------------------------------- 1433package-dir := scripts/package 1434 1435%src-pkg: FORCE 1436 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1437%pkg: include/config/kernel.release FORCE 1438 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1439 1440 1441# Brief documentation of the typical targets used 1442# --------------------------------------------------------------------------- 1443 1444boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) 1445boards := $(sort $(notdir $(boards))) 1446board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) 1447board-dirs := $(sort $(notdir $(board-dirs:/=))) 1448 1449PHONY += help 1450help: 1451 @echo 'Cleaning targets:' 1452 @echo ' clean - Remove most generated files but keep the config and' 1453 @echo ' enough build support to build external modules' 1454 @echo ' mrproper - Remove all generated files + config + various backup files' 1455 @echo ' distclean - mrproper + remove editor backup and patch files' 1456 @echo '' 1457 @echo 'Configuration targets:' 1458 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1459 @echo '' 1460 @echo 'Other generic targets:' 1461 @echo ' all - Build all targets marked with [*]' 1462 @echo '* vmlinux - Build the bare kernel' 1463 @echo '* modules - Build all modules' 1464 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1465 @echo ' dir/ - Build all files in dir and below' 1466 @echo ' dir/file.[ois] - Build specified target only' 1467 @echo ' dir/file.ll - Build the LLVM assembly file' 1468 @echo ' (requires compiler support for LLVM assembly generation)' 1469 @echo ' dir/file.lst - Build specified mixed source/assembly target only' 1470 @echo ' (requires a recent binutils and recent build (System.map))' 1471 @echo ' dir/file.ko - Build module including final link' 1472 @echo ' modules_prepare - Set up for building external modules' 1473 @echo ' tags/TAGS - Generate tags file for editors' 1474 @echo ' cscope - Generate cscope index' 1475 @echo ' gtags - Generate GNU GLOBAL index' 1476 @echo ' kernelrelease - Output the release version string (use with make -s)' 1477 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' 1478 @echo ' image_name - Output the image name (use with make -s)' 1479 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1480 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1481 echo '' 1482 @echo 'Static analysers:' 1483 @echo ' checkstack - Generate a list of stack hogs' 1484 @echo ' namespacecheck - Name space analysis on compiled kernel' 1485 @echo ' versioncheck - Sanity check on version.h usage' 1486 @echo ' includecheck - Check for duplicate included header files' 1487 @echo ' export_report - List the usages of all exported symbols' 1488 @echo ' headers_check - Sanity check on exported headers' 1489 @echo ' headerdep - Detect inclusion cycles in headers' 1490 @echo ' coccicheck - Check with Coccinelle' 1491 @echo '' 1492 @echo 'Kernel selftest:' 1493 @echo ' kselftest - Build and run kernel selftest (run as root)' 1494 @echo ' Build, install, and boot kernel before' 1495 @echo ' running kselftest on it' 1496 @echo ' kselftest-clean - Remove all generated kselftest files' 1497 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' 1498 @echo ' .config.' 1499 @echo '' 1500 @$(if $(dtstree), \ 1501 echo 'Devicetree:'; \ 1502 echo '* dtbs - Build device tree blobs for enabled boards'; \ 1503 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ 1504 echo '') 1505 1506 @echo 'Userspace tools targets:' 1507 @echo ' use "make tools/help"' 1508 @echo ' or "cd tools; make help"' 1509 @echo '' 1510 @echo 'Kernel packaging:' 1511 @$(MAKE) $(build)=$(package-dir) help 1512 @echo '' 1513 @echo 'Documentation targets:' 1514 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp 1515 @echo '' 1516 @echo 'Architecture specific targets ($(SRCARCH)):' 1517 @$(if $(archhelp),$(archhelp),\ 1518 echo ' No architecture specific help defined for $(SRCARCH)') 1519 @echo '' 1520 @$(if $(boards), \ 1521 $(foreach b, $(boards), \ 1522 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1523 echo '') 1524 @$(if $(board-dirs), \ 1525 $(foreach b, $(board-dirs), \ 1526 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ 1527 printf " %-16s - Show all of the above\\n" help-boards; \ 1528 echo '') 1529 1530 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1531 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1532 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1533 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)' 1534 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1535 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' 1536 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where' 1537 @echo ' 1: warnings which may be relevant and do not occur too often' 1538 @echo ' 2: warnings which occur quite often but may still be relevant' 1539 @echo ' 3: more obscure warnings, can most likely be ignored' 1540 @echo ' Multiple levels can be combined with W=12 or W=123' 1541 @echo '' 1542 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1543 @echo 'For further info see the ./README file' 1544 1545 1546help-board-dirs := $(addprefix help-,$(board-dirs)) 1547 1548help-boards: $(help-board-dirs) 1549 1550boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) 1551 1552$(help-board-dirs): help-%: 1553 @echo 'Architecture specific targets ($(SRCARCH) $*):' 1554 @$(if $(boards-per-dir), \ 1555 $(foreach b, $(boards-per-dir), \ 1556 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ 1557 echo '') 1558 1559 1560# Documentation targets 1561# --------------------------------------------------------------------------- 1562DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ 1563 linkcheckdocs dochelp refcheckdocs 1564PHONY += $(DOC_TARGETS) 1565$(DOC_TARGETS): scripts_basic FORCE 1566 $(Q)$(MAKE) $(build)=Documentation $@ 1567 1568# Misc 1569# --------------------------------------------------------------------------- 1570 1571PHONY += scripts_gdb 1572scripts_gdb: prepare0 1573 $(Q)$(MAKE) $(build)=scripts/gdb 1574 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) 1575 1576ifdef CONFIG_GDB_SCRIPTS 1577all: scripts_gdb 1578endif 1579 1580else # KBUILD_EXTMOD 1581 1582### 1583# External module support. 1584# When building external modules the kernel used as basis is considered 1585# read-only, and no consistency checks are made and the make 1586# system is not used on the basis kernel. If updates are required 1587# in the basis kernel ordinary make commands (without M=...) must 1588# be used. 1589# 1590# The following are the only valid targets when building external 1591# modules. 1592# make M=dir clean Delete all automatically generated files 1593# make M=dir modules Make all modules in specified dir 1594# make M=dir Same as 'make M=dir modules' 1595# make M=dir modules_install 1596# Install the modules built in the module directory 1597# Assumes install directory is already created 1598 1599# We are always building modules 1600KBUILD_MODULES := 1 1601 1602PHONY += $(objtree)/Module.symvers 1603$(objtree)/Module.symvers: 1604 @test -e $(objtree)/Module.symvers || ( \ 1605 echo; \ 1606 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1607 echo " is missing; modules will have no dependencies and modversions."; \ 1608 echo ) 1609 1610module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1611PHONY += $(module-dirs) modules 1612$(module-dirs): prepare $(objtree)/Module.symvers 1613 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1614 1615modules: $(module-dirs) 1616 @$(kecho) ' Building modules, stage 2.'; 1617 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1618 1619PHONY += modules_install 1620modules_install: _emodinst_ _emodinst_post 1621 1622install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1623PHONY += _emodinst_ 1624_emodinst_: 1625 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1626 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1627 1628PHONY += _emodinst_post 1629_emodinst_post: _emodinst_ 1630 $(call cmd,depmod) 1631 1632clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1633 1634PHONY += $(clean-dirs) clean 1635$(clean-dirs): 1636 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1637 1638clean: rm-dirs := $(MODVERDIR) 1639clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1640 1641PHONY += help 1642help: 1643 @echo ' Building external modules.' 1644 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1645 @echo '' 1646 @echo ' modules - default target, build the module(s)' 1647 @echo ' modules_install - install the module' 1648 @echo ' clean - remove generated files in module directory only' 1649 @echo '' 1650 1651PHONY += prepare 1652prepare: 1653 $(cmd_crmodverdir) 1654endif # KBUILD_EXTMOD 1655 1656clean: $(clean-dirs) 1657 $(call cmd,rmdirs) 1658 $(call cmd,rmfiles) 1659 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ 1660 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ 1661 -o -name '*.ko.*' \ 1662 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ 1663 -o -name '*.dwo' -o -name '*.lst' \ 1664 -o -name '*.su' \ 1665 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1666 -o -name '*.hdrtest.c' \ 1667 -o -name '*.lex.c' -o -name '*.tab.[ch]' \ 1668 -o -name '*.asn1.[ch]' \ 1669 -o -name '*.symtypes' -o -name 'modules.order' \ 1670 -o -name modules.builtin -o -name '.tmp_*.o.*' \ 1671 -o -name '*.c.[012]*.*' \ 1672 -o -name '*.ll' \ 1673 -o -name '*.gcno' \) -type f -print | xargs rm -f 1674 1675# Generate tags for editors 1676# --------------------------------------------------------------------------- 1677quiet_cmd_tags = GEN $@ 1678 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ 1679 1680tags TAGS cscope gtags: FORCE 1681 $(call cmd,tags) 1682 1683# Scripts to check various things for consistency 1684# --------------------------------------------------------------------------- 1685 1686PHONY += includecheck versioncheck coccicheck namespacecheck export_report 1687 1688includecheck: 1689 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1690 -name '*.[hcS]' -type f -print | sort \ 1691 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl 1692 1693versioncheck: 1694 find $(srctree)/* $(RCS_FIND_IGNORE) \ 1695 -name '*.[hcS]' -type f -print | sort \ 1696 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl 1697 1698coccicheck: 1699 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ 1700 1701namespacecheck: 1702 $(PERL) $(srctree)/scripts/namespace.pl 1703 1704export_report: 1705 $(PERL) $(srctree)/scripts/export_report.pl 1706 1707PHONY += checkstack kernelrelease kernelversion image_name 1708 1709# UML needs a little special treatment here. It wants to use the host 1710# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1711# else wants $(ARCH), including people doing cross-builds, which means 1712# that $(SUBARCH) doesn't work here. 1713ifeq ($(ARCH), um) 1714CHECKSTACK_ARCH := $(SUBARCH) 1715else 1716CHECKSTACK_ARCH := $(ARCH) 1717endif 1718checkstack: 1719 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1720 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1721 1722kernelrelease: 1723 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" 1724 1725kernelversion: 1726 @echo $(KERNELVERSION) 1727 1728image_name: 1729 @echo $(KBUILD_IMAGE) 1730 1731# Clear a bunch of variables before executing the submake 1732 1733ifeq ($(quiet),silent_) 1734tools_silent=s 1735endif 1736 1737tools/: FORCE 1738 $(Q)mkdir -p $(objtree)/tools 1739 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ 1740 1741tools/%: FORCE 1742 $(Q)mkdir -p $(objtree)/tools 1743 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $* 1744 1745# Single targets 1746# --------------------------------------------------------------------------- 1747# Single targets are compatible with: 1748# - build with mixed source and output 1749# - build with separate output dir 'make O=...' 1750# - external modules 1751# 1752# target-dir => where to store outputfile 1753# build-dir => directory in kernel source tree to use 1754 1755build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@ 1756build-dir = $(patsubst %/,%,$(dir $(build-target))) 1757 1758%.i: prepare FORCE 1759 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1760%.ll: prepare FORCE 1761 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1762%.lst: prepare FORCE 1763 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1764%.o: prepare FORCE 1765 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1766%.s: prepare FORCE 1767 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1768%.symtypes: prepare FORCE 1769 $(Q)$(MAKE) $(build)=$(build-dir) $(build-target) 1770%.ko: %.o 1771 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1772 1773# Modules 1774PHONY += / 1775/: ./ 1776 1777%/: prepare FORCE 1778 $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) 1779 1780# FIXME Should go into a make.lib or something 1781# =========================================================================== 1782 1783quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1784 cmd_rmdirs = rm -rf $(rm-dirs) 1785 1786quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1787 cmd_rmfiles = rm -f $(rm-files) 1788 1789# Run depmod only if we have System.map and depmod is executable 1790quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1791 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ 1792 $(KERNELRELEASE) 1793 1794# Create temporary dir for module support files 1795# clean it up only when building all modules 1796cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ 1797 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) 1798 1799# read saved command lines for existing targets 1800existing-targets := $(wildcard $(sort $(targets))) 1801 1802-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) 1803 1804endif # ifeq ($(config-targets),1) 1805endif # ifeq ($(mixed-targets),1) 1806endif # need-sub-make 1807 1808PHONY += FORCE 1809FORCE: 1810 1811# Declare the contents of the PHONY variable as phony. We keep that 1812# information in a variable so we can use it in if_changed and friends. 1813.PHONY: $(PHONY) 1814