Makefile

   1 # Makefile for buildroot
   2 #
   3 # Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
   4 # Copyright (C) 2006-2014 by the Buildroot developers <buildroot@uclibc.org>
   5 # Copyright (C) 2014-2016 by the Buildroot developers <buildroot@buildroot.org>
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15 # General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20 #
  21
  22 #--------------------------------------------------------------
  23 # Just run 'make menuconfig', configure stuff, then run 'make'.
  24 # You shouldn't need to mess with anything beyond this point...
  25 #--------------------------------------------------------------
  26
  27 # we want bash as shell
  28 SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  29          else if [ -x /bin/bash ]; then echo /bin/bash; \
  30          else echo sh; fi; fi)
  31
  32 # Set O variable if not already done on the command line;
  33 # or avoid confusing packages that can use the O=<dir> syntax for out-of-tree
  34 # build by preventing it from being forwarded to sub-make calls.
  35 ifneq ("$(origin O)", "command line")
  36 O := $(CURDIR)/output
  37 endif
  38
  39 # Check if the current Buildroot execution meets all the pre-requisites.
  40 # If they are not met, Buildroot will actually do its job in a sub-make meeting
  41 # its pre-requisites, which are:
  42 #  1- Permissive enough umask:
  43 #       Wrong or too restrictive umask will prevent Buildroot and packages from
  44 #       creating files and directories.
  45 #  2- Absolute canonical CWD (i.e. $(CURDIR)):
  46 #       Otherwise, some packages will use CWD as-is, others will compute its
  47 #       absolute canonical path. This makes harder tracking and fixing host
  48 #       machine path leaks.
  49 #  3- Absolute canonical output location (i.e. $(O)):
  50 #       For the same reason as the one for CWD.
  51
  52 # Remove the trailing '/.' from $(O) as it can be added by the makefile wrapper
  53 # installed in the $(O) directory.
  54 # Also remove the trailing '/' the user can set when on the command line.
  55 override O := $(patsubst %/,%,$(patsubst %.,%,$(O)))
  56 # Make sure $(O) actually exists before calling realpath on it; this is to
  57 # avoid empty CANONICAL_O in case on non-existing entry.
  58 CANONICAL_O := $(shell mkdir -p $(O) >/dev/null 2>&1)$(realpath $(O))
  59
  60 CANONICAL_CURDIR = $(realpath $(CURDIR))
  61
  62 REQ_UMASK = 0022
  63
  64 # Make sure O= is passed (with its absolute canonical path) everywhere the
  65 # toplevel makefile is called back.
  66 EXTRAMAKEARGS := O=$(CANONICAL_O)
  67
  68 # Check Buildroot execution pre-requisites here.
  69 ifneq ($(shell umask):$(CURDIR):$(O),$(REQ_UMASK):$(CANONICAL_CURDIR):$(CANONICAL_O))
  70 .PHONY: _all $(MAKECMDGOALS)
  71
  72 $(MAKECMDGOALS): _all
  73         @:
  74
  75 _all:
  76         @umask $(REQ_UMASK) && \
  77                 $(MAKE) -C $(CANONICAL_CURDIR) --no-print-directory \
  78                         $(MAKECMDGOALS) $(EXTRAMAKEARGS)
  79
  80 else # umask / $(CURDIR) / $(O)
  81
  82 # This is our default rule, so must come first
  83 all:
  84
  85 # Set and export the version string
  86 export BR2_VERSION := 2016.11-rc2
  87
  88 # Save running make version since it's clobbered by the make package
  89 RUNNING_MAKE_VERSION := $(MAKE_VERSION)
  90
  91 # Check for minimal make version (note: this check will break at make 10.x)
  92 MIN_MAKE_VERSION = 3.81
  93 ifneq ($(firstword $(sort $(RUNNING_MAKE_VERSION) $(MIN_MAKE_VERSION))),$(MIN_MAKE_VERSION))
  94 $(error You have make '$(RUNNING_MAKE_VERSION)' installed. GNU make >= $(MIN_MAKE_VERSION) is required)
  95 endif
  96
  97 # Parallel execution of this Makefile is disabled because it changes
  98 # the packages building order, that can be a problem for two reasons:
  99 # - If a package has an unspecified optional dependency and that
 100 #   dependency is present when the package is built, it is used,
 101 #   otherwise it isn't (but compilation happily proceeds) so the end
 102 #   result will differ if the order is swapped due to parallel
 103 #   building.
 104 # - Also changing the building order can be a problem if two packages
 105 #   manipulate the same file in the target directory.
 106 #
 107 # Taking into account the above considerations, if you still want to execute
 108 # this top-level Makefile in parallel comment the ".NOTPARALLEL" line and
 109 # use the -j<jobs> option when building, e.g:
 110 #      make -j$((`getconf _NPROCESSORS_ONLN`+1))
 111 .NOTPARALLEL:
 112
 113 # absolute path
 114 TOPDIR := $(CURDIR)
 115 CONFIG_CONFIG_IN = Config.in
 116 CONFIG = support/kconfig
 117 DATE := $(shell date +%Y%m%d)
 118
 119 # Compute the full local version string so packages can use it as-is
 120 # Need to export it, so it can be got from environment in children (eg. mconf)
 121 export BR2_VERSION_FULL := $(BR2_VERSION)$(shell $(TOPDIR)/support/scripts/setlocalversion)
 122
 123 noconfig_targets := menuconfig nconfig gconfig xconfig config oldconfig randconfig \
 124         defconfig %_defconfig allyesconfig allnoconfig silentoldconfig release \
 125         randpackageconfig allyespackageconfig allnopackageconfig \
 126         print-version olddefconfig distclean
 127
 128 # Some global targets do not trigger a build, but are used to collect
 129 # metadata, or do various checks. When such targets are triggered,
 130 # some packages should not do their configuration sanity
 131 # checks. Provide them a BR_BUILDING variable set to 'y' when we're
 132 # actually building and they should do their sanity checks.
 133 #
 134 # We're building in two situations: when MAKECMDGOALS is empty
 135 # (default target is to build), or when MAKECMDGOALS contains
 136 # something else than one of the nobuild_targets.
 137 nobuild_targets := source source-check \
 138         legal-info external-deps _external-deps \
 139         clean distclean help
 140 ifeq ($(MAKECMDGOALS),)
 141 BR_BUILDING = y
 142 else ifneq ($(filter-out $(nobuild_targets),$(MAKECMDGOALS)),)
 143 BR_BUILDING = y
 144 endif
 145
 146 # We call make recursively to build packages. The command-line overrides that
 147 # are passed to Buildroot don't apply to those package build systems. In
 148 # particular, we don't want to pass down the O=<dir> option for out-of-tree
 149 # builds, because the value specified on the command line will not be correct
 150 # for packages.
 151 MAKEOVERRIDES :=
 152
 153 # Include some helper macros and variables
 154 include support/misc/utils.mk
 155
 156 # Set variables related to in-tree or out-of-tree build.
 157 # Here, both $(O) and $(CURDIR) are absolute canonical paths.
 158 ifeq ($(O),$(CURDIR)/output)
 159 CONFIG_DIR := $(CURDIR)
 160 NEED_WRAPPER =
 161 else
 162 CONFIG_DIR := $(O)
 163 NEED_WRAPPER = y
 164 endif
 165
 166 # bash prints the name of the directory on 'cd <dir>' if CDPATH is
 167 # set, so unset it here to not cause problems. Notice that the export
 168 # line doesn't affect the environment of $(shell ..) calls, so
 169 # explictly throw away any output from 'cd' here.
 170 export CDPATH :=
 171 BASE_DIR := $(shell mkdir -p $(O) && cd $(O) >/dev/null && pwd)
 172 $(if $(BASE_DIR),, $(error output directory "$(O)" does not exist))
 173
 174
 175 # Handling of BR2_EXTERNAL.
 176 #
 177 # The value of BR2_EXTERNAL is stored in .br-external in the output directory.
 178 # The location of the external.mk makefile fragments is computed in that file.
 179 # On subsequent invocations of make, this file is read in. BR2_EXTERNAL can
 180 # still be overridden on the command line, therefore the file is re-created
 181 # every time make is run.
 182
 183 BR2_EXTERNAL_FILE = $(BASE_DIR)/.br-external.mk
 184 -include $(BR2_EXTERNAL_FILE)
 185 $(shell support/scripts/br2-external \
 186         -m -o '$(BR2_EXTERNAL_FILE)' $(BR2_EXTERNAL))
 187 BR2_EXTERNAL_ERROR =
 188 include $(BR2_EXTERNAL_FILE)
 189 ifneq ($(BR2_EXTERNAL_ERROR),)
 190 $(error $(BR2_EXTERNAL_ERROR))
 191 endif
 192
 193 # To make sure that the environment variable overrides the .config option,
 194 # set this before including .config.
 195 ifneq ($(BR2_DL_DIR),)
 196 DL_DIR := $(BR2_DL_DIR)
 197 endif
 198 ifneq ($(BR2_CCACHE_DIR),)
 199 BR_CACHE_DIR := $(BR2_CCACHE_DIR)
 200 endif
 201
 202 # Need that early, before we scan packages
 203 # Avoids doing the $(or...) everytime
 204 BR_GRAPH_OUT := $(or $(BR2_GRAPH_OUT),pdf)
 205
 206 BUILD_DIR := $(BASE_DIR)/build
 207 BINARIES_DIR := $(BASE_DIR)/images
 208 TARGET_DIR := $(BASE_DIR)/target
 209 # initial definition so that 'make clean' works for most users, even without
 210 # .config. HOST_DIR will be overwritten later when .config is included.
 211 HOST_DIR := $(BASE_DIR)/host
 212 GRAPHS_DIR := $(BASE_DIR)/graphs
 213
 214 LEGAL_INFO_DIR = $(BASE_DIR)/legal-info
 215 REDIST_SOURCES_DIR_TARGET = $(LEGAL_INFO_DIR)/sources
 216 REDIST_SOURCES_DIR_HOST = $(LEGAL_INFO_DIR)/host-sources
 217 LICENSE_FILES_DIR_TARGET = $(LEGAL_INFO_DIR)/licenses
 218 LICENSE_FILES_DIR_HOST = $(LEGAL_INFO_DIR)/host-licenses
 219 LEGAL_MANIFEST_CSV_TARGET = $(LEGAL_INFO_DIR)/manifest.csv
 220 LEGAL_MANIFEST_CSV_HOST = $(LEGAL_INFO_DIR)/host-manifest.csv
 221 LEGAL_WARNINGS = $(LEGAL_INFO_DIR)/.warnings
 222 LEGAL_REPORT = $(LEGAL_INFO_DIR)/README
 223
 224 ################################################################################
 225 #
 226 # staging and target directories do NOT list these as
 227 # dependencies anywhere else
 228 #
 229 ################################################################################
 230 $(BUILD_DIR) $(TARGET_DIR) $(HOST_DIR) $(BINARIES_DIR) $(LEGAL_INFO_DIR) $(REDIST_SOURCES_DIR_TARGET) $(REDIST_SOURCES_DIR_HOST):
 231         @mkdir -p $@
 232
 233 BR2_CONFIG = $(CONFIG_DIR)/.config
 234
 235 # Pull in the user's configuration file
 236 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
 237 -include $(BR2_CONFIG)
 238 endif
 239
 240 # timezone and locale may affect build output
 241 ifeq ($(BR2_REPRODUCIBLE),y)
 242 export TZ=UTC
 243 export LANG=C
 244 export LC_ALL=C
 245 endif
 246
 247 # To put more focus on warnings, be less verbose as default
 248 # Use 'make V=1' to see the full commands
 249 ifeq ("$(origin V)", "command line")
 250   KBUILD_VERBOSE = $(V)
 251 endif
 252 ifndef KBUILD_VERBOSE
 253   KBUILD_VERBOSE = 0
 254 endif
 255
 256 ifeq ($(KBUILD_VERBOSE),1)
 257   Q =
 258 ifndef VERBOSE
 259   VERBOSE = 1
 260 endif
 261 export VERBOSE
 262 else
 263   Q = @
 264 endif
 265
 266 # kconfig uses CONFIG_SHELL
 267 CONFIG_SHELL := $(SHELL)
 268
 269 export SHELL CONFIG_SHELL Q KBUILD_VERBOSE
 270
 271 ifndef HOSTAR
 272 HOSTAR := ar
 273 endif
 274 ifndef HOSTAS
 275 HOSTAS := as
 276 endif
 277 ifndef HOSTCC
 278 HOSTCC := gcc
 279 HOSTCC := $(shell which $(HOSTCC) || type -p $(HOSTCC) || echo gcc)
 280 endif
 281 HOSTCC_NOCCACHE := $(HOSTCC)
 282 ifndef HOSTCXX
 283 HOSTCXX := g++
 284 HOSTCXX := $(shell which $(HOSTCXX) || type -p $(HOSTCXX) || echo g++)
 285 endif
 286 HOSTCXX_NOCCACHE := $(HOSTCXX)
 287 ifndef HOSTCPP
 288 HOSTCPP := cpp
 289 endif
 290 ifndef HOSTLD
 291 HOSTLD := ld
 292 endif
 293 ifndef HOSTLN
 294 HOSTLN := ln
 295 endif
 296 ifndef HOSTNM
 297 HOSTNM := nm
 298 endif
 299 ifndef HOSTOBJCOPY
 300 HOSTOBJCOPY := objcopy
 301 endif
 302 ifndef HOSTRANLIB
 303 HOSTRANLIB := ranlib
 304 endif
 305 HOSTAR := $(shell which $(HOSTAR) || type -p $(HOSTAR) || echo ar)
 306 HOSTAS := $(shell which $(HOSTAS) || type -p $(HOSTAS) || echo as)
 307 HOSTCPP := $(shell which $(HOSTCPP) || type -p $(HOSTCPP) || echo cpp)
 308 HOSTLD := $(shell which $(HOSTLD) || type -p $(HOSTLD) || echo ld)
 309 HOSTLN := $(shell which $(HOSTLN) || type -p $(HOSTLN) || echo ln)
 310 HOSTNM := $(shell which $(HOSTNM) || type -p $(HOSTNM) || echo nm)
 311 HOSTOBJCOPY := $(shell which $(HOSTOBJCOPY) || type -p $(HOSTOBJCOPY) || echo objcopy)
 312 HOSTRANLIB := $(shell which $(HOSTRANLIB) || type -p $(HOSTRANLIB) || echo ranlib)
 313
 314 export HOSTAR HOSTAS HOSTCC HOSTCXX HOSTLD
 315 export HOSTCC_NOCCACHE HOSTCXX_NOCCACHE
 316
 317 # Determine the userland we are running on.
 318 #
 319 # Note that, despite its name, we are not interested in the actual
 320 # architecture name. This is mostly used to determine whether some
 321 # of the binary tools (e.g. pre-built external toolchains) can run
 322 # on the current host. So we need to know if the userland we're
 323 # running on can actually run those toolchains.
 324 #
 325 # For example, a 64-bit prebuilt toolchain will not run on a 64-bit
 326 # kernel if the userland is 32-bit (e.g. in a chroot for example).
 327 #
 328 # So, we extract the first part of the tuple the host gcc was
 329 # configured to generate code for; we assume this is our userland.
 330 #
 331 export HOSTARCH := $(shell LC_ALL=C $(HOSTCC_NOCCACHE) -v 2>&1 | \
 332         sed -e '/^Target: \([^-]*\).*/!d' \
 333             -e 's//\1/' \
 334             -e 's/i.86/x86/' \
 335             -e 's/sun4u/sparc64/' \
 336             -e 's/arm.*/arm/' \
 337             -e 's/sa110/arm/' \
 338             -e 's/ppc64/powerpc64/' \
 339             -e 's/ppc/powerpc/' \
 340             -e 's/macppc/powerpc/' \
 341             -e 's/sh.*/sh/' )
 342
 343 HOSTCC_VERSION := $(shell $(HOSTCC_NOCCACHE) --version | \
 344         sed -n -r 's/^.* ([0-9]*)\.([0-9]*)\.([0-9]*)[ ]*.*/\1 \2/p')
 345
 346 # For gcc >= 5.x, we only need the major version.
 347 ifneq ($(firstword $(HOSTCC_VERSION)),4)
 348 HOSTCC_VERSION := $(firstword $(HOSTCC_VERSION))
 349 endif
 350
 351 # Make sure pkg-config doesn't look outside the buildroot tree
 352 HOST_PKG_CONFIG_PATH := $(PKG_CONFIG_PATH)
 353 unexport PKG_CONFIG_PATH
 354 unexport PKG_CONFIG_SYSROOT_DIR
 355 unexport PKG_CONFIG_LIBDIR
 356
 357 # Having DESTDIR set in the environment confuses the installation
 358 # steps of some packages.
 359 unexport DESTDIR
 360
 361 # Causes breakage with packages that needs host-ruby
 362 unexport RUBYOPT
 363
 364 include package/pkg-utils.mk
 365 include package/doc-asciidoc.mk
 366
 367 ifeq ($(BR2_HAVE_DOT_CONFIG),y)
 368
 369 ################################################################################
 370 #
 371 # Hide troublesome environment variables from sub processes
 372 #
 373 ################################################################################
 374 unexport CROSS_COMPILE
 375 unexport ARCH
 376 unexport CC
 377 unexport LD
 378 unexport AR
 379 unexport CXX
 380 unexport CPP
 381 unexport RANLIB
 382 unexport CFLAGS
 383 unexport CXXFLAGS
 384 unexport GREP_OPTIONS
 385 unexport TAR_OPTIONS
 386 unexport CONFIG_SITE
 387 unexport QMAKESPEC
 388 unexport TERMINFO
 389 unexport MACHINE
 390 unexport O
 391
 392 GNU_HOST_NAME := $(shell support/gnuconfig/config.guess)
 393
 394 PACKAGES :=
 395 PACKAGES_ALL :=
 396
 397 # silent mode requested?
 398 QUIET := $(if $(findstring s,$(filter-out --%,$(MAKEFLAGS))),-q)
 399
 400 # Strip off the annoying quoting
 401 ARCH := $(call qstrip,$(BR2_ARCH))
 402
 403 KERNEL_ARCH := $(shell echo "$(ARCH)" | sed -e "s/-.*//" \
 404         -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 405         -e s/arcle/arc/ \
 406         -e s/arceb/arc/ \
 407         -e s/arm.*/arm/ -e s/sa110/arm/ \
 408         -e s/aarch64.*/arm64/ \
 409         -e s/bfin/blackfin/ \
 410         -e s/parisc64/parisc/ \
 411         -e s/powerpc64.*/powerpc/ \
 412         -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
 413         -e s/sh.*/sh/ \
 414         -e s/microblazeel/microblaze/)
 415
 416 ZCAT := $(call qstrip,$(BR2_ZCAT))
 417 BZCAT := $(call qstrip,$(BR2_BZCAT))
 418 XZCAT := $(call qstrip,$(BR2_XZCAT))
 419 TAR_OPTIONS = $(call qstrip,$(BR2_TAR_OPTIONS)) -xf
 420
 421 # packages compiled for the host go here
 422 HOST_DIR := $(call qstrip,$(BR2_HOST_DIR))
 423
 424 # Quotes are needed for spaces and all in the original PATH content.
 425 BR_PATH = "$(HOST_DIR)/bin:$(HOST_DIR)/sbin:$(HOST_DIR)/usr/bin:$(HOST_DIR)/usr/sbin:$(PATH)"
 426
 427 # Location of a file giving a big fat warning that output/target
 428 # should not be used as the root filesystem.
 429 TARGET_DIR_WARNING_FILE = $(TARGET_DIR)/THIS_IS_NOT_YOUR_ROOT_FILESYSTEM
 430
 431 ifeq ($(BR2_CCACHE),y)
 432 CCACHE := $(HOST_DIR)/usr/bin/ccache
 433 BR_CACHE_DIR ?= $(call qstrip,$(BR2_CCACHE_DIR))
 434 export BR_CACHE_DIR
 435 HOSTCC := $(CCACHE) $(HOSTCC)
 436 HOSTCXX := $(CCACHE) $(HOSTCXX)
 437 else
 438 export BR_NO_CCACHE
 439 endif
 440
 441 # Scripts in support/ or post-build scripts may need to reference
 442 # these locations, so export them so it is easier to use
 443 export BR2_CONFIG
 444 export BR2_REPRODUCIBLE
 445 export TARGET_DIR
 446 export STAGING_DIR
 447 export HOST_DIR
 448 export BINARIES_DIR
 449 export BASE_DIR
 450
 451 ################################################################################
 452 #
 453 # You should probably leave this stuff alone unless you know
 454 # what you are doing.
 455 #
 456 ################################################################################
 457
 458 all: world
 459
 460 # Include legacy before the other things, because package .mk files
 461 # may rely on it.
 462 include Makefile.legacy
 463
 464 include package/Makefile.in
 465 include support/dependencies/dependencies.mk
 466
 467 include toolchain/*.mk
 468 include toolchain/*/*.mk
 469
 470 # Include the package override file if one has been provided in the
 471 # configuration.
 472 PACKAGE_OVERRIDE_FILE = $(call qstrip,$(BR2_PACKAGE_OVERRIDE_FILE))
 473 ifneq ($(PACKAGE_OVERRIDE_FILE),)
 474 -include $(PACKAGE_OVERRIDE_FILE)
 475 endif
 476
 477 include $(sort $(wildcard package/*/*.mk))
 478
 479 include boot/common.mk
 480 include linux/linux.mk
 481 include fs/common.mk
 482
 483 # If using a br2-external tree, the BR2_EXTERNAL_$(NAME)_PATH variables
 484 # are also present in the .config file. Since .config is included after
 485 # we defined them in the Makefile, the values for those variables are
 486 # quoted. We just include the generated Makefile fragment .br2-external.mk
 487 # a third time, which will set those variables to the un-quoted values.
 488 include $(BR2_EXTERNAL_FILE)
 489
 490 # Nothing to include if no BR2_EXTERNAL tree in use
 491 include $(BR2_EXTERNAL_MKS)
 492
 493 # Now we are sure we have all the packages scanned and defined. We now
 494 # check for each package in the list of enabled packages, that all its
 495 # dependencies are indeed enabled.
 496 #
 497 # Only trigger the check for default builds. If the user forces building
 498 # a package, even if not enabled in the configuration, we want to accept
 499 # it.
 500 #
 501 ifeq ($(MAKECMDGOALS),)
 502
 503 define CHECK_ONE_DEPENDENCY
 504 ifeq ($$($(2)_TYPE),target)
 505 ifeq ($$($(2)_IS_VIRTUAL),)
 506 ifneq ($$($$($(2)_KCONFIG_VAR)),y)
 507 $$(error $$($(2)_NAME) is in the dependency chain of $$($(1)_NAME) that \
 508 has added it to its _DEPENDENCIES variable without selecting it or \
 509 depending on it from Config.in)
 510 endif
 511 endif
 512 endif
 513 endef
 514
 515 $(foreach pkg,$(call UPPERCASE,$(PACKAGES)),\
 516         $(foreach dep,$(call UPPERCASE,$($(pkg)_FINAL_ALL_DEPENDENCIES)),\
 517                 $(eval $(call CHECK_ONE_DEPENDENCY,$(pkg),$(dep))$(sep))))
 518
 519 endif
 520
 521 dirs: $(BUILD_DIR) $(STAGING_DIR) $(TARGET_DIR) \
 522         $(HOST_DIR) $(BINARIES_DIR)
 523
 524 $(BUILD_DIR)/buildroot-config/auto.conf: $(BR2_CONFIG)
 525         $(MAKE1) $(EXTRAMAKEARGS) HOSTCC="$(HOSTCC_NOCCACHE)" HOSTCXX="$(HOSTCXX_NOCCACHE)" silentoldconfig
 526
 527 prepare: $(BUILD_DIR)/buildroot-config/auto.conf
 528
 529 world: target-post-image
 530
 531 .PHONY: all world toolchain dirs clean distclean source outputmakefile \
 532         legal-info legal-info-prepare legal-info-clean printvars help \
 533         list-defconfigs target-finalize target-post-image source-check
 534
 535 # Populating the staging with the base directories is handled by the skeleton package
 536 $(STAGING_DIR):
 537         @mkdir -p $(STAGING_DIR)
 538         @ln -snf $(STAGING_DIR) $(BASE_DIR)/staging
 539
 540 RSYNC_VCS_EXCLUSIONS = \
 541         --exclude .svn --exclude .git --exclude .hg --exclude .bzr \
 542         --exclude CVS
 543
 544 STRIP_FIND_CMD = find $(TARGET_DIR)
 545 ifneq (,$(call qstrip,$(BR2_STRIP_EXCLUDE_DIRS)))
 546 STRIP_FIND_CMD += \( $(call finddirclauses,$(TARGET_DIR),$(call qstrip,$(BR2_STRIP_EXCLUDE_DIRS))) \) -prune -o
 547 endif
 548 STRIP_FIND_CMD += -type f \( -perm /111 -o -name '*.so*' \)
 549 # file exclusions:
 550 # - libpthread.so: a non-stripped libpthread shared library is needed for
 551 #   proper debugging of pthread programs using gdb.
 552 # - ld.so: a non-stripped dynamic linker library is needed for valgrind
 553 # - kernel modules (*.ko): do not function properly when stripped like normal
 554 #   applications and libraries. Normally kernel modules are already excluded
 555 #   by the executable permission check above, so the explicit exclusion is only
 556 #   done for kernel modules with incorrect permissions.
 557 STRIP_FIND_CMD += -not \( $(call findfileclauses,libpthread*.so* ld-*.so* *.ko $(call qstrip,$(BR2_STRIP_EXCLUDE_FILES))) \) -print0
 558
 559 ifeq ($(BR2_ECLIPSE_REGISTER),y)
 560 define TOOLCHAIN_ECLIPSE_REGISTER
 561         ./support/scripts/eclipse-register-toolchain `readlink -f $(O)` \
 562                 $(notdir $(TARGET_CROSS)) $(BR2_ARCH)
 563 endef
 564 TARGET_FINALIZE_HOOKS += TOOLCHAIN_ECLIPSE_REGISTER
 565 endif
 566
 567 # Generate locale data. Basically, we call the localedef program
 568 # (built by the host-localedef package) for each locale. The input
 569 # data comes preferably from the toolchain, or if the toolchain does
 570 # not have them (Linaro toolchains), we use the ones available on the
 571 # host machine.
 572 ifeq ($(BR2_TOOLCHAIN_USES_GLIBC),y)
 573 GLIBC_GENERATE_LOCALES = $(call qstrip,$(BR2_GENERATE_LOCALE))
 574 ifneq ($(GLIBC_GENERATE_LOCALES),)
 575 PACKAGES += host-localedef
 576
 577 define GENERATE_GLIBC_LOCALES
 578         $(Q)mkdir -p $(TARGET_DIR)/usr/lib/locale/
 579         $(Q)for locale in $(GLIBC_GENERATE_LOCALES) ; do \
 580                 inputfile=`echo $${locale} | cut -f1 -d'.'` ; \
 581                 charmap=`echo $${locale} | cut -f2 -d'.' -s` ; \
 582                 if test -z "$${charmap}" ; then \
 583                         charmap="UTF-8" ; \
 584                 fi ; \
 585                 echo "Generating locale $${inputfile}.$${charmap}" ; \
 586                 I18NPATH=$(STAGING_DIR)/usr/share/i18n:/usr/share/i18n \
 587                 $(HOST_DIR)/usr/bin/localedef \
 588                         --prefix=$(TARGET_DIR) \
 589                         --$(call LOWERCASE,$(BR2_ENDIAN))-endian \
 590                         -i $${inputfile} -f $${charmap} \
 591                         $${locale} ; \
 592         done
 593 endef
 594 TARGET_FINALIZE_HOOKS += GENERATE_GLIBC_LOCALES
 595 endif
 596 endif
 597
 598 ifeq ($(BR2_ENABLE_LOCALE_PURGE),y)
 599 LOCALE_WHITELIST = $(BUILD_DIR)/locales.nopurge
 600 LOCALE_NOPURGE = $(call qstrip,$(BR2_ENABLE_LOCALE_WHITELIST))
 601
 602 # This piece of junk does the following:
 603 # First collect the whitelist in a file.
 604 # Then go over all the locale dirs and for each subdir, check if it exists
 605 # in the whitelist file. If it doesn't, kill it.
 606 # Finally, specifically for X11, regenerate locale.dir from the whitelist.
 607 define PURGE_LOCALES
 608         rm -f $(LOCALE_WHITELIST)
 609         for i in $(LOCALE_NOPURGE) locale-archive; do echo $$i >> $(LOCALE_WHITELIST); done
 610
 611         for dir in $(wildcard $(addprefix $(TARGET_DIR),/usr/share/locale /usr/share/X11/locale /usr/lib/locale)); \
 612         do \
 613                 for langdir in $$dir/*; \
 614                 do \
 615                         if [ -e "$${langdir}" ]; \
 616                         then \
 617                                 grep -qx "$${langdir##*/}" $(LOCALE_WHITELIST) || rm -rf $$langdir; \
 618                         fi \
 619                 done; \
 620         done
 621         if [ -d $(TARGET_DIR)/usr/share/X11/locale ]; \
 622         then \
 623                 for lang in $(LOCALE_NOPURGE); \
 624                 do \
 625                         if [ -f $(TARGET_DIR)/usr/share/X11/locale/$$lang/XLC_LOCALE ]; \
 626                         then \
 627                                 echo "$$lang/XLC_LOCALE: $$lang"; \
 628                         fi \
 629                 done > $(TARGET_DIR)/usr/share/X11/locale/locale.dir; \
 630         fi
 631 endef
 632 TARGET_FINALIZE_HOOKS += PURGE_LOCALES
 633 endif
 634
 635 $(TARGETS_ROOTFS): target-finalize
 636
 637 target-finalize: $(PACKAGES)
 638         @$(call MESSAGE,"Finalizing target directory")
 639         $(foreach hook,$(TARGET_FINALIZE_HOOKS),$($(hook))$(sep))
 640         rm -rf $(TARGET_DIR)/usr/include $(TARGET_DIR)/usr/share/aclocal \
 641                 $(TARGET_DIR)/usr/lib/pkgconfig $(TARGET_DIR)/usr/share/pkgconfig \
 642                 $(TARGET_DIR)/usr/lib/cmake $(TARGET_DIR)/usr/share/cmake
 643         find $(TARGET_DIR)/usr/{lib,share}/ -name '*.cmake' -print0 | xargs -0 rm -f
 644         find $(TARGET_DIR)/lib/ $(TARGET_DIR)/usr/lib/ $(TARGET_DIR)/usr/libexec/ \
 645                 \( -name '*.a' -o -name '*.la' \) -print0 | xargs -0 rm -f
 646 ifneq ($(BR2_PACKAGE_GDB),y)
 647         rm -rf $(TARGET_DIR)/usr/share/gdb
 648 endif
 649 ifneq ($(BR2_PACKAGE_BASH),y)
 650         rm -rf $(TARGET_DIR)/usr/share/bash-completion
 651 endif
 652 ifneq ($(BR2_PACKAGE_ZSH),y)
 653         rm -rf $(TARGET_DIR)/usr/share/zsh
 654 endif
 655         rm -rf $(TARGET_DIR)/usr/man $(TARGET_DIR)/usr/share/man
 656         rm -rf $(TARGET_DIR)/usr/info $(TARGET_DIR)/usr/share/info
 657         rm -rf $(TARGET_DIR)/usr/doc $(TARGET_DIR)/usr/share/doc
 658         rm -rf $(TARGET_DIR)/usr/share/gtk-doc
 659         -rmdir $(TARGET_DIR)/usr/share 2>/dev/null
 660         $(STRIP_FIND_CMD) | xargs -0 $(STRIPCMD) 2>/dev/null || true
 661
 662 # See http://sourceware.org/gdb/wiki/FAQ, "GDB does not see any threads
 663 # besides the one in which crash occurred; or SIGTRAP kills my program when
 664 # I set a breakpoint"
 665 ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
 666         find $(TARGET_DIR)/lib/ -type f -name 'libpthread*.so*' | \
 667                 xargs -r $(STRIPCMD) $(STRIP_STRIP_DEBUG)
 668 endif
 669
 670 # Valgrind needs ld.so with enough information, so only strip
 671 # debugging symbols.
 672         find $(TARGET_DIR)/lib/ -type f -name 'ld-*.so*' | \
 673                 xargs -r $(STRIPCMD) $(STRIP_STRIP_DEBUG)
 674         test -f $(TARGET_DIR)/etc/ld.so.conf && \
 675                 { echo "ERROR: we shouldn't have a /etc/ld.so.conf file"; exit 1; } || true
 676         test -d $(TARGET_DIR)/etc/ld.so.conf.d && \
 677                 { echo "ERROR: we shouldn't have a /etc/ld.so.conf.d directory"; exit 1; } || true
 678         mkdir -p $(TARGET_DIR)/etc
 679         ( \
 680                 echo "NAME=Buildroot"; \
 681                 echo "VERSION=$(BR2_VERSION_FULL)"; \
 682                 echo "ID=buildroot"; \
 683                 echo "VERSION_ID=$(BR2_VERSION)"; \
 684                 echo "PRETTY_NAME=\"Buildroot $(BR2_VERSION)\"" \
 685         ) >  $(TARGET_DIR)/etc/os-release
 686
 687         @$(foreach d, $(call qstrip,$(BR2_ROOTFS_OVERLAY)), \
 688                 $(call MESSAGE,"Copying overlay $(d)"); \
 689                 rsync -a --ignore-times --keep-dirlinks $(RSYNC_VCS_EXCLUSIONS) \
 690                         --chmod=u=rwX,go=rX --exclude .empty --exclude '*~' \
 691                         $(d)/ $(TARGET_DIR)$(sep))
 692
 693         @$(foreach s, $(call qstrip,$(BR2_ROOTFS_POST_BUILD_SCRIPT)), \
 694                 $(call MESSAGE,"Executing post-build script $(s)"); \
 695                 $(EXTRA_ENV) $(s) $(TARGET_DIR) $(call qstrip,$(BR2_ROOTFS_POST_SCRIPT_ARGS))$(sep))
 696
 697 target-post-image: $(TARGETS_ROOTFS) target-finalize
 698         @$(foreach s, $(call qstrip,$(BR2_ROOTFS_POST_IMAGE_SCRIPT)), \
 699                 $(call MESSAGE,"Executing post-image script $(s)"); \
 700                 $(EXTRA_ENV) $(s) $(BINARIES_DIR) $(call qstrip,$(BR2_ROOTFS_POST_SCRIPT_ARGS))$(sep))
 701
 702 source: $(foreach p,$(PACKAGES),$(p)-all-source)
 703
 704 _external-deps: $(foreach p,$(PACKAGES),$(p)-all-external-deps)
 705 external-deps:
 706         @$(MAKE1) -Bs $(EXTRAMAKEARGS) _external-deps | sort -u
 707
 708 # check if download URLs are outdated
 709 source-check: $(foreach p,$(PACKAGES),$(p)-all-source-check)
 710
 711 legal-info-clean:
 712         @rm -fr $(LEGAL_INFO_DIR)
 713
 714 legal-info-prepare: $(LEGAL_INFO_DIR)
 715         @$(call MESSAGE,"Collecting legal info")
 716         @$(call legal-license-file,buildroot,COPYING,COPYING,HOST)
 717         @$(call legal-manifest,PACKAGE,VERSION,LICENSE,LICENSE FILES,SOURCE ARCHIVE,SOURCE SITE,TARGET)
 718         @$(call legal-manifest,PACKAGE,VERSION,LICENSE,LICENSE FILES,SOURCE ARCHIVE,SOURCE SITE,HOST)
 719         @$(call legal-manifest,buildroot,$(BR2_VERSION_FULL),GPLv2+,COPYING,not saved,not saved,HOST)
 720         @$(call legal-warning,the Buildroot source code has not been saved)
 721         @cp $(BR2_CONFIG) $(LEGAL_INFO_DIR)/buildroot.config
 722
 723 legal-info: dirs legal-info-clean legal-info-prepare $(foreach p,$(PACKAGES),$(p)-all-legal-info) \
 724                 $(REDIST_SOURCES_DIR_TARGET) $(REDIST_SOURCES_DIR_HOST)
 725         @cat support/legal-info/README.header >>$(LEGAL_REPORT)
 726         @if [ -r $(LEGAL_WARNINGS) ]; then \
 727                 cat support/legal-info/README.warnings-header \
 728                         $(LEGAL_WARNINGS) >>$(LEGAL_REPORT); \
 729                 cat $(LEGAL_WARNINGS); fi
 730         @rm -f $(LEGAL_WARNINGS)
 731         @(cd $(LEGAL_INFO_DIR); \
 732                 find * -type f -exec sha256sum {} + | LC_ALL=C sort -k2 \
 733                         >.legal-info.sha256; \
 734                 mv .legal-info.sha256 legal-info.sha256)
 735         @echo "Legal info produced in $(LEGAL_INFO_DIR)"
 736
 737 show-targets:
 738         @echo $(PACKAGES) $(TARGETS_ROOTFS)
 739
 740 graph-build: $(O)/build/build-time.log
 741         @install -d $(GRAPHS_DIR)
 742         $(foreach o,name build duration,./support/scripts/graph-build-time \
 743                                         --type=histogram --order=$(o) --input=$(<) \
 744                                         --output=$(GRAPHS_DIR)/build.hist-$(o).$(BR_GRAPH_OUT) \
 745                                         $(if $(BR2_GRAPH_ALT),--alternate-colors)$(sep))
 746         $(foreach t,packages steps,./support/scripts/graph-build-time \
 747                                    --type=pie-$(t) --input=$(<) \
 748                                    --output=$(GRAPHS_DIR)/build.pie-$(t).$(BR_GRAPH_OUT) \
 749                                    $(if $(BR2_GRAPH_ALT),--alternate-colors)$(sep))
 750
 751 graph-depends-requirements:
 752         @dot -? >/dev/null 2>&1 || \
 753                 { echo "ERROR: The 'dot' program from Graphviz is needed for graph-depends" >&2; exit 1; }
 754
 755 graph-depends: graph-depends-requirements
 756         @$(INSTALL) -d $(GRAPHS_DIR)
 757         @cd "$(CONFIG_DIR)"; \
 758         $(TOPDIR)/support/scripts/graph-depends $(BR2_GRAPH_DEPS_OPTS) \
 759                 --direct -o $(GRAPHS_DIR)/$(@).dot
 760         dot $(BR2_GRAPH_DOT_OPTS) -T$(BR_GRAPH_OUT) \
 761                 -o $(GRAPHS_DIR)/$(@).$(BR_GRAPH_OUT) \
 762                 $(GRAPHS_DIR)/$(@).dot
 763
 764 graph-size:
 765         $(Q)mkdir -p $(GRAPHS_DIR)
 766         $(Q)$(TOPDIR)/support/scripts/size-stats --builddir $(BASE_DIR) \
 767                 --graph $(GRAPHS_DIR)/graph-size.$(BR_GRAPH_OUT) \
 768                 --file-size-csv $(GRAPHS_DIR)/file-size-stats.csv \
 769                 --package-size-csv $(GRAPHS_DIR)/package-size-stats.csv
 770
 771 check-dependencies:
 772         @cd "$(CONFIG_DIR)"; \
 773         $(TOPDIR)/support/scripts/graph-depends -C
 774
 775 else # ifeq ($(BR2_HAVE_DOT_CONFIG),y)
 776
 777 all: menuconfig
 778
 779 endif # ifeq ($(BR2_HAVE_DOT_CONFIG),y)
 780
 781 # configuration
 782 # ---------------------------------------------------------------------------
 783
 784 HOSTCFLAGS = $(CFLAGS_FOR_BUILD)
 785 export HOSTCFLAGS
 786
 787 .PHONY: prepare-kconfig
 788 prepare-kconfig: outputmakefile $(BUILD_DIR)/.br2-external.in
 789
 790 $(BUILD_DIR)/buildroot-config/%onf:
 791         mkdir -p $(@D)/lxdialog
 792         PKG_CONFIG_PATH="$(HOST_PKG_CONFIG_PATH)" $(MAKE) CC="$(HOSTCC_NOCCACHE)" HOSTCC="$(HOSTCC_NOCCACHE)" \
 793             obj=$(@D) -C $(CONFIG) -f Makefile.br $(@F)
 794
 795 DEFCONFIG = $(call qstrip,$(BR2_DEFCONFIG))
 796
 797 # We don't want to fully expand BR2_DEFCONFIG here, so Kconfig will
 798 # recognize that if it's still at its default $(CONFIG_DIR)/defconfig
 799 COMMON_CONFIG_ENV = \
 800         BR2_DEFCONFIG='$(call qstrip,$(value BR2_DEFCONFIG))' \
 801         KCONFIG_AUTOCONFIG=$(BUILD_DIR)/buildroot-config/auto.conf \
 802         KCONFIG_AUTOHEADER=$(BUILD_DIR)/buildroot-config/autoconf.h \
 803         KCONFIG_TRISTATE=$(BUILD_DIR)/buildroot-config/tristate.config \
 804         BR2_CONFIG=$(BR2_CONFIG) \
 805         HOST_GCC_VERSION="$(HOSTCC_VERSION)" \
 806         BUILD_DIR=$(BUILD_DIR) \
 807         SKIP_LEGACY=
 808
 809 xconfig: $(BUILD_DIR)/buildroot-config/qconf prepare-kconfig
 810         @$(COMMON_CONFIG_ENV) $< $(CONFIG_CONFIG_IN)
 811
 812 gconfig: $(BUILD_DIR)/buildroot-config/gconf prepare-kconfig
 813         @$(COMMON_CONFIG_ENV) srctree=$(TOPDIR) $< $(CONFIG_CONFIG_IN)
 814
 815 menuconfig: $(BUILD_DIR)/buildroot-config/mconf prepare-kconfig
 816         @$(COMMON_CONFIG_ENV) $< $(CONFIG_CONFIG_IN)
 817
 818 nconfig: $(BUILD_DIR)/buildroot-config/nconf prepare-kconfig
 819         @$(COMMON_CONFIG_ENV) $< $(CONFIG_CONFIG_IN)
 820
 821 config: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 822         @$(COMMON_CONFIG_ENV) $< $(CONFIG_CONFIG_IN)
 823
 824 # For the config targets that automatically select options, we pass
 825 # SKIP_LEGACY=y to disable the legacy options. However, in that case
 826 # no values are set for the legacy options so a subsequent oldconfig
 827 # will query them. Therefore, run an additional olddefconfig.
 828
 829 oldconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 830         @$(COMMON_CONFIG_ENV) $< --oldconfig $(CONFIG_CONFIG_IN)
 831
 832 randconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 833         @$(COMMON_CONFIG_ENV) SKIP_LEGACY=y $< --randconfig $(CONFIG_CONFIG_IN)
 834         @$(COMMON_CONFIG_ENV) $< --olddefconfig $(CONFIG_CONFIG_IN) >/dev/null
 835
 836 allyesconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 837         @$(COMMON_CONFIG_ENV) SKIP_LEGACY=y $< --allyesconfig $(CONFIG_CONFIG_IN)
 838         @$(COMMON_CONFIG_ENV) $< --olddefconfig $(CONFIG_CONFIG_IN) >/dev/null
 839
 840 allnoconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 841         @$(COMMON_CONFIG_ENV) SKIP_LEGACY=y $< --allnoconfig $(CONFIG_CONFIG_IN)
 842         @$(COMMON_CONFIG_ENV) $< --olddefconfig $(CONFIG_CONFIG_IN) >/dev/null
 843
 844 randpackageconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 845         @grep -v BR2_PACKAGE_ $(BR2_CONFIG) > $(CONFIG_DIR)/.config.nopkg
 846         @$(COMMON_CONFIG_ENV) SKIP_LEGACY=y \
 847                 KCONFIG_ALLCONFIG=$(CONFIG_DIR)/.config.nopkg \
 848                 $< --randconfig $(CONFIG_CONFIG_IN)
 849         @rm -f $(CONFIG_DIR)/.config.nopkg
 850         @$(COMMON_CONFIG_ENV) $< --olddefconfig $(CONFIG_CONFIG_IN) >/dev/null
 851
 852 allyespackageconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 853         @grep -v BR2_PACKAGE_ $(BR2_CONFIG) > $(CONFIG_DIR)/.config.nopkg
 854         @$(COMMON_CONFIG_ENV) SKIP_LEGACY=y \
 855                 KCONFIG_ALLCONFIG=$(CONFIG_DIR)/.config.nopkg \
 856                 $< --allyesconfig $(CONFIG_CONFIG_IN)
 857         @rm -f $(CONFIG_DIR)/.config.nopkg
 858         @$(COMMON_CONFIG_ENV) $< --olddefconfig $(CONFIG_CONFIG_IN) >/dev/null
 859
 860 allnopackageconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 861         @grep -v BR2_PACKAGE_ $(BR2_CONFIG) > $(CONFIG_DIR)/.config.nopkg
 862         @$(COMMON_CONFIG_ENV) SKIP_LEGACY=y \
 863                 KCONFIG_ALLCONFIG=$(CONFIG_DIR)/.config.nopkg \
 864                 $< --allnoconfig $(CONFIG_CONFIG_IN)
 865         @rm -f $(CONFIG_DIR)/.config.nopkg
 866         @$(COMMON_CONFIG_ENV) $< --olddefconfig $(CONFIG_CONFIG_IN) >/dev/null
 867
 868 silentoldconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 869         $(COMMON_CONFIG_ENV) $< --silentoldconfig $(CONFIG_CONFIG_IN)
 870
 871 olddefconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 872         $(COMMON_CONFIG_ENV) $< --olddefconfig $(CONFIG_CONFIG_IN)
 873
 874 defconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 875         @$(COMMON_CONFIG_ENV) $< --defconfig$(if $(DEFCONFIG),=$(DEFCONFIG)) $(CONFIG_CONFIG_IN)
 876
 877 define percent_defconfig
 878 # Override the BR2_DEFCONFIG from COMMON_CONFIG_ENV with the new defconfig
 879 %_defconfig: $(BUILD_DIR)/buildroot-config/conf $(1)/configs/%_defconfig prepare-kconfig
 880         @$$(COMMON_CONFIG_ENV) BR2_DEFCONFIG=$(1)/configs/$$@ \
 881                 $$< --defconfig=$(1)/configs/$$@ $$(CONFIG_CONFIG_IN)
 882 endef
 883 $(eval $(foreach d,$(call reverse,$(TOPDIR) $(BR2_EXTERNAL_DIRS)),$(call percent_defconfig,$(d))$(sep)))
 884
 885 savedefconfig: $(BUILD_DIR)/buildroot-config/conf prepare-kconfig
 886         @$(COMMON_CONFIG_ENV) $< \
 887                 --savedefconfig=$(if $(DEFCONFIG),$(DEFCONFIG),$(CONFIG_DIR)/defconfig) \
 888                 $(CONFIG_CONFIG_IN)
 889         @$(SED) '/BR2_DEFCONFIG=/d' $(if $(DEFCONFIG),$(DEFCONFIG),$(CONFIG_DIR)/defconfig)
 890
 891 .PHONY: defconfig savedefconfig
 892
 893 ################################################################################
 894 #
 895 # Cleanup and misc junk
 896 #
 897 ################################################################################
 898
 899 # outputmakefile generates a Makefile in the output directory, if using a
 900 # separate output directory. This allows convenient use of make in the
 901 # output directory.
 902 outputmakefile:
 903 ifeq ($(NEED_WRAPPER),y)
 904         $(Q)$(TOPDIR)/support/scripts/mkmakefile $(TOPDIR) $(O)
 905 endif
 906
 907 # Even though the target is a real file, we mark it as PHONY as we
 908 # want it to be re-generated each time make is invoked, in case the
 909 # value of BR2_EXTERNAL is changed.
 910 .PHONY: $(BUILD_DIR)/.br2-external.in
 911 $(BUILD_DIR)/.br2-external.in: $(BUILD_DIR)
 912         $(Q)support/scripts/br2-external -k -o "$(@)" $(BR2_EXTERNAL)
 913
 914 # printvars prints all the variables currently defined in our
 915 # Makefiles. Alternatively, if a non-empty VARS variable is passed,
 916 # only the variables matching the make pattern passed in VARS are
 917 # displayed.
 918 printvars:
 919         @$(foreach V, \
 920                 $(sort $(if $(VARS),$(filter $(VARS),$(.VARIABLES)),$(.VARIABLES))), \
 921                 $(if $(filter-out environment% default automatic, \
 922                                 $(origin $V)), \
 923                 $(info $V=$($V) ($(value $V)))))
 924
 925 clean:
 926         rm -rf $(TARGET_DIR) $(BINARIES_DIR) $(HOST_DIR) \
 927                 $(BUILD_DIR) $(BASE_DIR)/staging \
 928                 $(LEGAL_INFO_DIR) $(GRAPHS_DIR)
 929
 930 distclean: clean
 931 ifeq ($(O),$(CURDIR)/output)
 932         rm -rf $(O)
 933 endif
 934         rm -rf $(TOPDIR)/dl $(BR2_CONFIG) $(CONFIG_DIR)/.config.old $(CONFIG_DIR)/..config.tmp \
 935                 $(CONFIG_DIR)/.auto.deps $(BR2_EXTERNAL_FILE)
 936
 937 help:
 938         @echo 'Cleaning:'
 939         @echo '  clean                  - delete all files created by build'
 940         @echo '  distclean              - delete all non-source files (including .config)'
 941         @echo
 942         @echo 'Build:'
 943         @echo '  all                    - make world'
 944         @echo '  toolchain              - build toolchain'
 945         @echo
 946         @echo 'Configuration:'
 947         @echo '  menuconfig             - interactive curses-based configurator'
 948         @echo '  nconfig                - interactive ncurses-based configurator'
 949         @echo '  xconfig                - interactive Qt-based configurator'
 950         @echo '  gconfig                - interactive GTK-based configurator'
 951         @echo '  oldconfig              - resolve any unresolved symbols in .config'
 952         @echo '  silentoldconfig        - Same as oldconfig, but quietly, additionally update deps'
 953         @echo '  olddefconfig           - Same as silentoldconfig but sets new symbols to their default value'
 954         @echo '  randconfig             - New config with random answer to all options'
 955         @echo '  defconfig              - New config with default answer to all options'
 956         @echo '                             BR2_DEFCONFIG, if set, is used as input'
 957         @echo '  savedefconfig          - Save current config to BR2_DEFCONFIG (minimal config)'
 958         @echo '  allyesconfig           - New config where all options are accepted with yes'
 959         @echo '  allnoconfig            - New config where all options are answered with no'
 960         @echo '  randpackageconfig      - New config with random answer to package options'
 961         @echo '  allyespackageconfig    - New config where pkg options are accepted with yes'
 962         @echo '  allnopackageconfig     - New config where package options are answered with no'
 963         @echo
 964         @echo 'Package-specific:'
 965         @echo '  <pkg>                  - Build and install <pkg> and all its dependencies'
 966         @echo '  <pkg>-source           - Only download the source files for <pkg>'
 967         @echo '  <pkg>-extract          - Extract <pkg> sources'
 968         @echo '  <pkg>-patch            - Apply patches to <pkg>'
 969         @echo '  <pkg>-depends          - Build <pkg>'\''s dependencies'
 970         @echo '  <pkg>-configure        - Build <pkg> up to the configure step'
 971         @echo '  <pkg>-build            - Build <pkg> up to the build step'
 972         @echo '  <pkg>-show-depends     - List packages on which <pkg> depends'
 973         @echo '  <pkg>-show-rdepends    - List packages which have <pkg> as a dependency'
 974         @echo '  <pkg>-graph-depends    - Generate a graph of <pkg>'\''s dependencies'
 975         @echo '  <pkg>-graph-rdepends   - Generate a graph of <pkg>'\''s reverse dependencies'
 976         @echo '  <pkg>-dirclean         - Remove <pkg> build directory'
 977         @echo '  <pkg>-reconfigure      - Restart the build from the configure step'
 978         @echo '  <pkg>-rebuild          - Restart the build from the build step'
 979         $(foreach p,$(HELP_PACKAGES), \
 980                 @echo $(sep) \
 981                 @echo '$($(p)_NAME):' $(sep) \
 982                 $($(p)_HELP_CMDS)$(sep))
 983         @echo
 984         @echo 'Documentation:'
 985         @echo '  manual                 - build manual in all formats'
 986         @echo '  manual-html            - build manual in HTML'
 987         @echo '  manual-split-html      - build manual in split HTML'
 988         @echo '  manual-pdf             - build manual in PDF'
 989         @echo '  manual-text            - build manual in text'
 990         @echo '  manual-epub            - build manual in ePub'
 991         @echo '  graph-build            - generate graphs of the build times'
 992         @echo '  graph-depends          - generate graph of the dependency tree'
 993         @echo '  graph-size             - generate stats of the filesystem size'
 994         @echo '  list-defconfigs        - list all defconfigs (pre-configured minimal systems)'
 995         @echo
 996         @echo 'Miscellaneous:'
 997         @echo '  source                 - download all sources needed for offline-build'
 998         @echo '  source-check           - check selected packages for valid download URLs'
 999         @echo '  external-deps          - list external packages used'
1000         @echo '  legal-info             - generate info about license compliance'
1001         @echo
1002         @echo '  make V=0|1             - 0 => quiet build (default), 1 => verbose build'
1003         @echo '  make O=dir             - Locate all output files in "dir", including .config'
1004         @echo
1005         @echo 'For further details, see README, generate the Buildroot manual, or consult'
1006         @echo 'it on-line at http://buildroot.org/docs.html'
1007         @echo
1008
1009 # List the defconfig files
1010 # $(1): base directory
1011 # $(2): br2-external name, empty for bundled
1012 define list-defconfigs
1013         @first=true; \
1014         for defconfig in $(1)/configs/*_defconfig; do \
1015                 [ -f "$${defconfig}" ] || continue; \
1016                 if $${first}; then \
1017                         if [ "$(2)" ]; then \
1018                                 printf 'External configs in "$(call qstrip,$(2))":\n'; \
1019                         else \
1020                                 printf "Built-in configs:\n"; \
1021                         fi; \
1022                         first=false; \
1023                 fi; \
1024                 defconfig="$${defconfig##*/}"; \
1025                 printf "  %-35s - Build for %s\n" "$${defconfig}" "$${defconfig%_defconfig}"; \
1026         done; \
1027         $${first} || printf "\n"
1028 endef
1029
1030 # We iterate over BR2_EXTERNAL_NAMES rather than BR2_EXTERNAL_DIRS,
1031 # because we want to display the name of the br2-external tree.
1032 list-defconfigs:
1033         $(call list-defconfigs,$(TOPDIR))
1034         $(foreach name,$(BR2_EXTERNAL_NAMES),\
1035                 $(call list-defconfigs,$(BR2_EXTERNAL_$(name)_PATH),\
1036                         $(BR2_EXTERNAL_$(name)_DESC))$(sep))
1037
1038 release: OUT = buildroot-$(BR2_VERSION)
1039
1040 # Create release tarballs. We need to fiddle a bit to add the generated
1041 # documentation to the git output
1042 release:
1043         git archive --format=tar --prefix=$(OUT)/ HEAD > $(OUT).tar
1044         $(MAKE) O=$(OUT) manual-html manual-text manual-pdf
1045         $(MAKE) O=$(OUT) manual-clean
1046         tar rf $(OUT).tar $(OUT)
1047         gzip -9 -c < $(OUT).tar > $(OUT).tar.gz
1048         bzip2 -9 -c < $(OUT).tar > $(OUT).tar.bz2
1049         rm -rf $(OUT) $(OUT).tar
1050
1051 print-version:
1052         @echo $(BR2_VERSION_FULL)
1053
1054 include docs/manual/manual.mk
1055 -include $(foreach dir,$(BR2_EXTERNAL_DIRS),$(dir)/docs/*/*.mk)
1056
1057 .PHONY: $(noconfig_targets)
1058
1059 endif #umask / $(CURDIR) / $(O)