src/v8/Makefile - cobalt - Git at Google

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
 #       with the distribution.
 #     * Neither the name of Google Inc. nor the names of its
 #       contributors may be used to endorse or promote products derived
 #       from this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


 # Variable default definitions. Override them by exporting them in your shell.
 OUTDIR ?= out
 TESTJOBS ?=
 GYPFLAGS ?=
 TESTFLAGS ?=
 ANDROID_NDK_HOST_ARCH ?=
 ANDROID_V8 ?= /data/local/tmp/v8

 # Special build flags. Use them like this: "make library=shared"

 # library=shared || component=shared_library
 ifeq ($(library), shared)
   GYPFLAGS += -Dcomponent=shared_library
 endif
 ifdef component
   GYPFLAGS += -Dcomponent=$(component)
 endif
 # disassembler=on
 ifeq ($(disassembler), on)
   GYPFLAGS += -Dv8_enable_disassembler=1
 endif
 # objectprint=on
 ifeq ($(objectprint), on)
   GYPFLAGS += -Dv8_object_print=1
 endif
 # verifycsa=on
 ifeq ($(verifycsa), on)
   GYPFLAGS += -Dv8_enable_verify_csa=1
 endif
 # verifyheap=on
 ifeq ($(verifyheap), on)
   GYPFLAGS += -Dv8_enable_verify_heap=1
 endif
 # tracemaps=on
 ifeq ($(tracemaps), on)
   GYPFLAGS += -Dv8_trace_maps=1
 endif
 # concurrentmarking=on
 ifeq ($(concurrentmarking), on)
   GYPFLAGS += -Dv8_enable_concurrent_marking=1
 endif
 # backtrace=off
 ifeq ($(backtrace), off)
   GYPFLAGS += -Dv8_enable_backtrace=0
 else
   GYPFLAGS += -Dv8_enable_backtrace=1
 endif
 # verifypredictable=on
 ifeq ($(verifypredictable), on)
   GYPFLAGS += -Dv8_enable_verify_predictable=1
 endif
 # snapshot=off
 ifeq ($(snapshot), off)
   GYPFLAGS += -Dv8_use_snapshot='false'
 endif
 ifeq ($(snapshot), external)
   GYPFLAGS += -Dv8_use_external_startup_data=1
 endif
 # extrachecks=on/off
 ifeq ($(extrachecks), on)
   GYPFLAGS += -Ddcheck_always_on=1 -Dv8_enable_handle_zapping=1
 endif
 ifeq ($(extrachecks), off)
   GYPFLAGS += -Ddcheck_always_on=0 -Dv8_enable_handle_zapping=0
 endif
 # slowdchecks=on/off
 ifeq ($(slowdchecks), on)
   GYPFLAGS += -Dv8_enable_slow_dchecks=1
 endif
 ifeq ($(slowdchecks), off)
   GYPFLAGS += -Dv8_enable_slow_dchecks=0
 endif
 # debugsymbols=on
 ifeq ($(debugsymbols), on)
   GYPFLAGS += -Drelease_extra_cflags=-ggdb3
 endif
 # gdbjit=on/off
 ifeq ($(gdbjit), on)
   GYPFLAGS += -Dv8_enable_gdbjit=1
 endif
 ifeq ($(gdbjit), off)
   GYPFLAGS += -Dv8_enable_gdbjit=0
 endif
 # vtunejit=on
 ifeq ($(vtunejit), on)
   GYPFLAGS += -Dv8_enable_vtunejit=1
 endif
 # unalignedaccess=on
 ifeq ($(unalignedaccess), on)
   GYPFLAGS += -Dv8_can_use_unaligned_accesses=true
 endif
 # randomseed=12345, disable random seed via randomseed=0
 ifdef randomseed
   GYPFLAGS += -Dv8_random_seed=$(randomseed)
 endif
 # soname_version=1.2.3
 ifdef soname_version
   GYPFLAGS += -Dsoname_version=$(soname_version)
 endif
 # werror=no
 ifeq ($(werror), no)
   GYPFLAGS += -Dwerror=''
 endif
 # strictaliasing=off (workaround for GCC-4.5)
 ifeq ($(strictaliasing), off)
   GYPFLAGS += -Dv8_no_strict_aliasing=1
 endif
 # regexp=interpreted
 ifeq ($(regexp), interpreted)
   GYPFLAGS += -Dv8_interpreted_regexp=1
 endif
 # i18nsupport=off
 ifeq ($(i18nsupport), off)
   GYPFLAGS += -Dv8_enable_i18n_support=0
   TESTFLAGS += --noi18n
 endif
 # deprecationwarnings=on
 ifeq ($(deprecationwarnings), on)
   GYPFLAGS += -Dv8_deprecation_warnings=1
 endif
 # vectorstores=on
 ifeq ($(vectorstores), on)
   GYPFLAGS += -Dv8_vector_stores=1
 endif
 # imminentdeprecationwarnings=on
 ifeq ($(imminentdeprecationwarnings), on)
   GYPFLAGS += -Dv8_imminent_deprecation_warnings=1
 endif
 # asan=on
 ifeq ($(asan), on)
   GYPFLAGS += -Dasan=1 -Dclang=1
   TESTFLAGS += --asan
   ifeq ($(lsan), on)
     GYPFLAGS += -Dlsan=1
   endif
 endif
 ifdef embedscript
   GYPFLAGS += -Dembed_script=$(embedscript)
 endif
 ifdef warmupscript
   GYPFLAGS += -Dwarmup_script=$(warmupscript)
 endif
 ifeq ($(goma), on)
   GYPFLAGS += -Duse_goma=1
 endif
 # v8_os_page_size=0, when 0 or not specified use build OS page size
 ifdef v8_os_page_size
   ifneq ($(v8_os_page_size), 0)
     ifneq ($(snapshot), off)
       GYPFLAGS += -Dv8_os_page_size=$(v8_os_page_size)
     endif
   endif
 endif
 # arm specific flags.
 # arm_version=<number | "default">
 ifneq ($(strip $(arm_version)),)
   GYPFLAGS += -Darm_version=$(arm_version)
 else
 # Deprecated (use arm_version instead): armv7=false/true
 ifeq ($(armv7), false)
   GYPFLAGS += -Darm_version=6
 else
 ifeq ($(armv7), true)
   GYPFLAGS += -Darm_version=7
 endif
 endif
 endif
 # hardfp=on/off. Deprecated, use armfloatabi
 ifeq ($(hardfp),on)
   GYPFLAGS += -Darm_float_abi=hard
 else
 ifeq ($(hardfp),off)
   GYPFLAGS += -Darm_float_abi=softfp
 endif
 endif
 # fpu: armfpu=xxx
 # xxx: vfp, vfpv3-d16, vfpv3, neon.
 ifeq ($(armfpu),)
   GYPFLAGS += -Darm_fpu=default
 else
   GYPFLAGS += -Darm_fpu=$(armfpu)
 endif
 # float abi: armfloatabi=softfp/hard
 ifeq ($(armfloatabi),)
 ifeq ($(hardfp),)
   GYPFLAGS += -Darm_float_abi=default
 endif
 else
   GYPFLAGS += -Darm_float_abi=$(armfloatabi)
 endif
 # armthumb=on/off
 ifeq ($(armthumb), off)
   GYPFLAGS += -Darm_thumb=0
 else
 ifeq ($(armthumb), on)
   GYPFLAGS += -Darm_thumb=1
 endif
 endif
 # arm_test_noprobe=on
 # With this flag set, by default v8 will only use features implied
 # by the compiler (no probe). This is done by modifying the default
 # values of enable_armv7, enable_vfp3, enable_32dregs and enable_neon.
 # Modifying these flags when launching v8 will enable the probing for
 # the specified values.
 ifeq ($(arm_test_noprobe), on)
   GYPFLAGS += -Darm_test_noprobe=on
 endif
 # Do not omit the frame pointer, needed for profiling with perf
 ifeq ($(no_omit_framepointer), on)
   GYPFLAGS += -Drelease_extra_cflags=-fno-omit-frame-pointer
 endif

 ifdef android_ndk_root
   GYPFLAGS += -Dandroid_ndk_root=$(android_ndk_root)
   export ANDROID_NDK_ROOT = $(android_ndk_root)
 endif

 # ----------------- available targets: --------------------
 # - any arch listed in ARCHES (see below)
 # - any mode listed in MODES
 # - every combination <arch>.<mode>, e.g. "ia32.release"
 # - "native": current host's architecture, release mode
 # - any of the above with .check appended, e.g. "ia32.release.check"
 # - "android": cross-compile for Android/ARM
 # - default (no target specified): build all DEFAULT_ARCHES and MODES
 # - "check": build all targets and run all tests
 # - "<arch>.clean" for any <arch> in ARCHES
 # - "clean": clean all ARCHES

 # ----------------- internal stuff ------------------------

 # Architectures and modes to be compiled. Consider these to be internal
 # variables, don't override them (use the targets instead).
 ARCHES = ia32 x64 arm arm64 mips mipsel mips64 mips64el ppc ppc64 s390 s390x
 ARCHES32 = ia32 arm mips mipsel ppc s390
 DEFAULT_ARCHES = ia32 x64 arm
 MODES = release debug optdebug
 DEFAULT_MODES = release debug
 ANDROID_ARCHES = android_ia32 android_x64 android_arm android_arm64 \
 		 android_mipsel

 # List of files that trigger Makefile regeneration:
 GYPFILES = third_party/icu/icu.gypi third_party/icu/icu.gyp \
 	   gypfiles/shim_headers.gypi gypfiles/features.gypi \
            gypfiles/standalone.gypi \
 	   gypfiles/toolchain.gypi gypfiles/all.gyp gypfiles/mac/asan.gyp \
 	   test/cctest/cctest.gyp test/fuzzer/fuzzer.gyp \
 	   test/unittests/unittests.gyp src/v8.gyp \
 	   tools/parser-shell.gyp testing/gmock.gyp testing/gtest.gyp \
 	   samples/samples.gyp src/third_party/vtune/v8vtune.gyp src/d8.gyp

 # If vtunejit=on, the v8vtune.gyp will be appended.
 ifeq ($(vtunejit), on)
   GYPFILES += src/third_party/vtune/v8vtune.gyp
 endif
 # Generates all combinations of ARCHES and MODES, e.g. "ia32.release".
 BUILDS = $(foreach mode,$(MODES),$(addsuffix .$(mode),$(ARCHES)))
 ANDROID_BUILDS = $(foreach mode,$(MODES), \
                    $(addsuffix .$(mode),$(ANDROID_ARCHES)))
 # Generates corresponding test targets, e.g. "ia32.release.check".
 CHECKS = $(addsuffix .check,$(BUILDS))
 QUICKCHECKS = $(addsuffix .quickcheck,$(BUILDS))
 ANDROID_CHECKS = $(addsuffix .check,$(ANDROID_BUILDS))
 # File where previously used GYPFLAGS are stored.
 ENVFILE = $(OUTDIR)/environment

 .PHONY: all check clean builddeps dependencies $(ENVFILE).new native \
         qc quickcheck $(QUICKCHECKS) turbocheck \
         $(addsuffix .quickcheck,$(MODES)) $(addsuffix .quickcheck,$(ARCHES)) \
         $(ARCHES) $(MODES) $(BUILDS) $(CHECKS) $(addsuffix .clean,$(ARCHES)) \
         $(addsuffix .check,$(MODES)) $(addsuffix .check,$(ARCHES)) \
         $(ANDROID_ARCHES) $(ANDROID_BUILDS) $(ANDROID_CHECKS)

 # Target definitions. "all" is the default.
 all: $(DEFAULT_MODES)

 # Special target for the buildbots to use. Depends on $(OUTDIR)/Makefile
 # having been created before.
 buildbot:
 	$(MAKE) -C "$(OUTDIR)" BUILDTYPE=$(BUILDTYPE) \
 	        builddir="$(abspath $(OUTDIR))/$(BUILDTYPE)"

 # Compile targets. MODES and ARCHES are convenience targets.
 .SECONDEXPANSION:
 $(MODES): $(addsuffix .$$@,$(DEFAULT_ARCHES))

 $(ARCHES): $(addprefix $$@.,$(DEFAULT_MODES))

 # Defines how to build a particular target (e.g. ia32.release).
 $(BUILDS): $(OUTDIR)/Makefile.$$@
 	@$(MAKE) -C "$(OUTDIR)" -f Makefile.$@ \
 	         BUILDTYPE=$(shell echo $(subst .,,$(suffix $@)) | \
 	                     python -c "print \
 	                     raw_input().replace('opt', '').capitalize()") \
 	         builddir="$(shell pwd)/$(OUTDIR)/$@"

 native: $(OUTDIR)/Makefile.native
 	@$(MAKE) -C "$(OUTDIR)" -f Makefile.native \
 	         BUILDTYPE=Release \
 	         builddir="$(shell pwd)/$(OUTDIR)/$@"

 $(ANDROID_ARCHES): $(addprefix $$@.,$(MODES))

 $(ANDROID_BUILDS): $(GYPFILES) $(ENVFILE) Makefile.android
 	@$(MAKE) -f Makefile.android $@ \
 	        ARCH="$(basename $@)" \
 	        MODE="$(subst .,,$(suffix $@))" \
 	        OUTDIR="$(OUTDIR)" \
 	        GYPFLAGS="$(GYPFLAGS)"

 # Test targets.
 check: all
 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch=$(shell echo $(DEFAULT_ARCHES) | sed -e 's/ /,/g') \
 	    $(TESTFLAGS)

 $(addsuffix .check,$(MODES)): $$(basename $$@)
 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --mode=$(basename $@) $(TESTFLAGS)

 $(addsuffix .check,$(ARCHES)): $$(basename $$@)
 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch=$(basename $@) $(TESTFLAGS)

 $(CHECKS): $$(basename $$@)
 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch-and-mode=$(basename $@) $(TESTFLAGS)

 $(addsuffix .quickcheck,$(MODES)): $$(basename $$@)
 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --mode=$(basename $@) $(TESTFLAGS) --quickcheck

 $(addsuffix .quickcheck,$(ARCHES)): $$(basename $$@)
 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch=$(basename $@) $(TESTFLAGS) --quickcheck

 $(QUICKCHECKS): $$(basename $$@)
 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch-and-mode=$(basename $@) $(TESTFLAGS) --quickcheck

 $(addsuffix .sync, $(ANDROID_BUILDS)): $$(basename $$@)
 	@tools/android-sync.sh $(basename $@) $(OUTDIR) \
 	                       $(shell pwd) $(ANDROID_V8)

 $(addsuffix .check, $(ANDROID_BUILDS)): $$(basename $$@).sync
 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	     --arch-and-mode=$(basename $@) \
 	     --timeout=600 \
 	     --command-prefix="tools/android-run.py" $(TESTFLAGS)

 $(addsuffix .check, $(ANDROID_ARCHES)): \
                 $(addprefix $$(basename $$@).,$(MODES)).check

 native.check: native
 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR)/native \
 	    --arch-and-mode=. $(TESTFLAGS)

 SUPERFASTTESTMODES = ia32.release
 FASTTESTMODES = $(SUPERFASTTESTMODES),x64.release,ia32.optdebug,x64.optdebug,arm.optdebug,arm64.release
 FASTCOMPILEMODES = $(FASTTESTMODES),arm64.optdebug

 COMMA = ,
 EMPTY =
 SPACE = $(EMPTY) $(EMPTY)
 quickcheck: $(subst $(COMMA),$(SPACE),$(FASTCOMPILEMODES))
 	tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch-and-mode=$(SUPERFASTTESTMODES) $(TESTFLAGS) --quickcheck \
 	    --download-data mozilla webkit
 	tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch-and-mode=$(FASTTESTMODES) $(TESTFLAGS) --quickcheck
 qc: quickcheck

 turbocheck: $(subst $(COMMA),$(SPACE),$(FASTCOMPILEMODES))
 	tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch-and-mode=$(SUPERFASTTESTMODES) $(TESTFLAGS) \
 	    --quickcheck --variants=turbofan --download-data mozilla webkit
 	tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
 	    --arch-and-mode=$(FASTTESTMODES) $(TESTFLAGS) \
 	    --quickcheck --variants=turbofan
 tc: turbocheck

 # Clean targets. You can clean each architecture individually, or everything.
 $(addsuffix .clean, $(ARCHES) $(ANDROID_ARCHES)):
 	rm -f $(OUTDIR)/Makefile.$(basename $@)*
 	rm -rf $(OUTDIR)/$(basename $@).release
 	rm -rf $(OUTDIR)/$(basename $@).debug
 	rm -rf $(OUTDIR)/$(basename $@).optdebug
 	find $(OUTDIR) -regex '.*\(host\|target\)\.$(basename $@).*\.mk' -delete

 native.clean:
 	rm -f $(OUTDIR)/Makefile.native
 	rm -rf $(OUTDIR)/native
 	find $(OUTDIR) -regex '.*\(host\|target\)\.native\.mk' -delete

 clean: $(addsuffix .clean, $(ARCHES) $(ANDROID_ARCHES)) native.clean gtags.clean tags.clean

 # GYP file generation targets.
 OUT_MAKEFILES = $(addprefix $(OUTDIR)/Makefile.,$(BUILDS))
 $(OUT_MAKEFILES): $(GYPFILES) $(ENVFILE)
 	$(eval CXX_TARGET_ARCH:=$(shell $(CXX) -v 2>&1 | grep ^Target: | \
 	        cut -f 2 -d " " | cut -f 1 -d "-" ))
 	$(eval CXX_TARGET_ARCH:=$(subst aarch64,arm64,$(CXX_TARGET_ARCH)))
 	$(eval CXX_TARGET_ARCH:=$(subst x86_64,x64,$(CXX_TARGET_ARCH)))
 	$(eval CXX_TARGET_ARCH:=$(subst s390x,s390,$(CXX_TARGET_ARCH)))
 	$(eval CXX_TARGET_ARCH:=$(subst powerpc,ppc,$(CXX_TARGET_ARCH)))
 	$(eval CXX_TARGET_ARCH:=$(subst ppc64,ppc,$(CXX_TARGET_ARCH)))
 	$(eval CXX_TARGET_ARCH:=$(subst ppcle,ppc,$(CXX_TARGET_ARCH)))
 	$(eval V8_TARGET_ARCH:=$(subst .,,$(suffix $(basename $@))))
 	PYTHONPATH="$(shell pwd)/tools/generate_shim_headers:$(shell pwd)/gypfiles:$(PYTHONPATH):$(shell pwd)/tools/gyp/pylib:$(PYTHONPATH)" \
 	GYP_GENERATORS=make \
 	tools/gyp/gyp --generator-output="$(OUTDIR)" gypfiles/all.gyp \
 	              -Igypfiles/standalone.gypi --depth=. \
 	              -Dv8_target_arch=$(V8_TARGET_ARCH) \
 	              $(if $(findstring $(CXX_TARGET_ARCH),$(V8_TARGET_ARCH)), \
 	              -Dtarget_arch=$(V8_TARGET_ARCH), \
 	                  $(if $(shell echo $(ARCHES32) | grep $(V8_TARGET_ARCH)), \
 	                  -Dtarget_arch=ia32,)) \
 	              $(if $(findstring optdebug,$@),-Dv8_optimized_debug=1,) \
 	              -S$(suffix $(basename $@))$(suffix $@) $(GYPFLAGS)

 $(OUTDIR)/Makefile.native: $(GYPFILES) $(ENVFILE)
 	PYTHONPATH="$(shell pwd)/tools/generate_shim_headers:$(shell pwd)/gypfiles:$(PYTHONPATH):$(shell pwd)/tools/gyp/pylib:$(PYTHONPATH)" \
 	GYP_GENERATORS=make \
 	tools/gyp/gyp --generator-output="$(OUTDIR)" gypfiles/all.gyp \
 	              -Igypfiles/standalone.gypi --depth=. -S.native $(GYPFLAGS)

 # Replaces the old with the new environment file if they're different, which
 # will trigger GYP to regenerate Makefiles.
 $(ENVFILE): $(ENVFILE).new
 	@if test -r $(ENVFILE) && cmp $(ENVFILE).new $(ENVFILE) > /dev/null; \
 	    then rm $(ENVFILE).new; \
 	    else mv $(ENVFILE).new $(ENVFILE); fi

 # Stores current GYPFLAGS in a file.
 $(ENVFILE).new:
 	$(eval CXX_TARGET_ARCH:=$(shell $(CXX) -v 2>&1 | grep ^Target: | \
 	        cut -f 2 -d " " | cut -f 1 -d "-" ))
 	$(eval CXX_TARGET_ARCH:=$(subst aarch64,arm64,$(CXX_TARGET_ARCH)))
 	$(eval CXX_TARGET_ARCH:=$(subst x86_64,x64,$(CXX_TARGET_ARCH)))
 	@mkdir -p $(OUTDIR); echo "GYPFLAGS=$(GYPFLAGS) -Dtarget_arch=$(CXX_TARGET_ARCH)" > $(ENVFILE).new;

 # Support for the GNU GLOBAL Source Code Tag System.
 gtags.files: $(GYPFILES) $(ENVFILE)
 	@find include src test -name '*.h' -o -name '*.cc' -o -name '*.c' > $@

 # We need to manually set the stack limit here, to work around bugs in
 # gmake-3.81 and global-5.7.1 on recent 64-bit Linux systems.
 # Using $(wildcard ...) gracefully ignores non-existing files, so that stale
 # gtags.files after switching branches don't cause recipe failures.
 GPATH GRTAGS GSYMS GTAGS: gtags.files $(wildcard $(shell cat gtags.files 2> /dev/null))
 	@bash -c 'ulimit -s 10240 && GTAGSFORCECPP=yes gtags -i -q -f $<'

 gtags.clean:
 	rm -f gtags.files GPATH GRTAGS GSYMS GTAGS

 tags: gtags.files $(wildcard $(shell cat gtags.files 2> /dev/null))
 	@(ctags --version | grep 'Exuberant Ctags' >/dev/null) || \
 		(echo "Please install Exuberant Ctags (check 'ctags --version')" >&2; false)
 	ctags --fields=+l -L $<

 tags.clean:
 	rm -r tags

 dependencies builddeps:
 	$(error Use 'gclient sync' instead)
	# Copyright 2012 the V8 project authors. All rights reserved.
	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions are
	# met:
	#
	# * Redistributions of source code must retain the above copyright
	# notice, this list of conditions and the following disclaimer.
	# * Redistributions in binary form must reproduce the above
	# copyright notice, this list of conditions and the following
	# disclaimer in the documentation and/or other materials provided
	# with the distribution.
	# * Neither the name of Google Inc. nor the names of its
	# contributors may be used to endorse or promote products derived
	# from this software without specific prior written permission.
	#
	# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


	# Variable default definitions. Override them by exporting them in your shell.
	OUTDIR ?= out
	TESTJOBS ?=
	GYPFLAGS ?=
	TESTFLAGS ?=
	ANDROID_NDK_HOST_ARCH ?=
	ANDROID_V8 ?= /data/local/tmp/v8

	# Special build flags. Use them like this: "make library=shared"

	# library=shared \|\| component=shared_library
	ifeq ($(library), shared)
	GYPFLAGS += -Dcomponent=shared_library
	endif
	ifdef component
	GYPFLAGS += -Dcomponent=$(component)
	endif
	# disassembler=on
	ifeq ($(disassembler), on)
	GYPFLAGS += -Dv8_enable_disassembler=1
	endif
	# objectprint=on
	ifeq ($(objectprint), on)
	GYPFLAGS += -Dv8_object_print=1
	endif
	# verifycsa=on
	ifeq ($(verifycsa), on)
	GYPFLAGS += -Dv8_enable_verify_csa=1
	endif
	# verifyheap=on
	ifeq ($(verifyheap), on)
	GYPFLAGS += -Dv8_enable_verify_heap=1
	endif
	# tracemaps=on
	ifeq ($(tracemaps), on)
	GYPFLAGS += -Dv8_trace_maps=1
	endif
	# concurrentmarking=on
	ifeq ($(concurrentmarking), on)
	GYPFLAGS += -Dv8_enable_concurrent_marking=1
	endif
	# backtrace=off
	ifeq ($(backtrace), off)
	GYPFLAGS += -Dv8_enable_backtrace=0
	else
	GYPFLAGS += -Dv8_enable_backtrace=1
	endif
	# verifypredictable=on
	ifeq ($(verifypredictable), on)
	GYPFLAGS += -Dv8_enable_verify_predictable=1
	endif
	# snapshot=off
	ifeq ($(snapshot), off)
	GYPFLAGS += -Dv8_use_snapshot='false'
	endif
	ifeq ($(snapshot), external)
	GYPFLAGS += -Dv8_use_external_startup_data=1
	endif
	# extrachecks=on/off
	ifeq ($(extrachecks), on)
	GYPFLAGS += -Ddcheck_always_on=1 -Dv8_enable_handle_zapping=1
	endif
	ifeq ($(extrachecks), off)
	GYPFLAGS += -Ddcheck_always_on=0 -Dv8_enable_handle_zapping=0
	endif
	# slowdchecks=on/off
	ifeq ($(slowdchecks), on)
	GYPFLAGS += -Dv8_enable_slow_dchecks=1
	endif
	ifeq ($(slowdchecks), off)
	GYPFLAGS += -Dv8_enable_slow_dchecks=0
	endif
	# debugsymbols=on
	ifeq ($(debugsymbols), on)
	GYPFLAGS += -Drelease_extra_cflags=-ggdb3
	endif
	# gdbjit=on/off
	ifeq ($(gdbjit), on)
	GYPFLAGS += -Dv8_enable_gdbjit=1
	endif
	ifeq ($(gdbjit), off)
	GYPFLAGS += -Dv8_enable_gdbjit=0
	endif
	# vtunejit=on
	ifeq ($(vtunejit), on)
	GYPFLAGS += -Dv8_enable_vtunejit=1
	endif
	# unalignedaccess=on
	ifeq ($(unalignedaccess), on)
	GYPFLAGS += -Dv8_can_use_unaligned_accesses=true
	endif
	# randomseed=12345, disable random seed via randomseed=0
	ifdef randomseed
	GYPFLAGS += -Dv8_random_seed=$(randomseed)
	endif
	# soname_version=1.2.3
	ifdef soname_version
	GYPFLAGS += -Dsoname_version=$(soname_version)
	endif
	# werror=no
	ifeq ($(werror), no)
	GYPFLAGS += -Dwerror=''
	endif
	# strictaliasing=off (workaround for GCC-4.5)
	ifeq ($(strictaliasing), off)
	GYPFLAGS += -Dv8_no_strict_aliasing=1
	endif
	# regexp=interpreted
	ifeq ($(regexp), interpreted)
	GYPFLAGS += -Dv8_interpreted_regexp=1
	endif
	# i18nsupport=off
	ifeq ($(i18nsupport), off)
	GYPFLAGS += -Dv8_enable_i18n_support=0
	TESTFLAGS += --noi18n
	endif
	# deprecationwarnings=on
	ifeq ($(deprecationwarnings), on)
	GYPFLAGS += -Dv8_deprecation_warnings=1
	endif
	# vectorstores=on
	ifeq ($(vectorstores), on)
	GYPFLAGS += -Dv8_vector_stores=1
	endif
	# imminentdeprecationwarnings=on
	ifeq ($(imminentdeprecationwarnings), on)
	GYPFLAGS += -Dv8_imminent_deprecation_warnings=1
	endif
	# asan=on
	ifeq ($(asan), on)
	GYPFLAGS += -Dasan=1 -Dclang=1
	TESTFLAGS += --asan
	ifeq ($(lsan), on)
	GYPFLAGS += -Dlsan=1
	endif
	endif
	ifdef embedscript
	GYPFLAGS += -Dembed_script=$(embedscript)
	endif
	ifdef warmupscript
	GYPFLAGS += -Dwarmup_script=$(warmupscript)
	endif
	ifeq ($(goma), on)
	GYPFLAGS += -Duse_goma=1
	endif
	# v8_os_page_size=0, when 0 or not specified use build OS page size
	ifdef v8_os_page_size
	ifneq ($(v8_os_page_size), 0)
	ifneq ($(snapshot), off)
	GYPFLAGS += -Dv8_os_page_size=$(v8_os_page_size)
	endif
	endif
	endif
	# arm specific flags.
	# arm_version=<number \| "default">
	ifneq ($(strip $(arm_version)),)
	GYPFLAGS += -Darm_version=$(arm_version)
	else
	# Deprecated (use arm_version instead): armv7=false/true
	ifeq ($(armv7), false)
	GYPFLAGS += -Darm_version=6
	else
	ifeq ($(armv7), true)
	GYPFLAGS += -Darm_version=7
	endif
	endif
	endif
	# hardfp=on/off. Deprecated, use armfloatabi
	ifeq ($(hardfp),on)
	GYPFLAGS += -Darm_float_abi=hard
	else
	ifeq ($(hardfp),off)
	GYPFLAGS += -Darm_float_abi=softfp
	endif
	endif
	# fpu: armfpu=xxx
	# xxx: vfp, vfpv3-d16, vfpv3, neon.
	ifeq ($(armfpu),)
	GYPFLAGS += -Darm_fpu=default
	else
	GYPFLAGS += -Darm_fpu=$(armfpu)
	endif
	# float abi: armfloatabi=softfp/hard
	ifeq ($(armfloatabi),)
	ifeq ($(hardfp),)
	GYPFLAGS += -Darm_float_abi=default
	endif
	else
	GYPFLAGS += -Darm_float_abi=$(armfloatabi)
	endif
	# armthumb=on/off
	ifeq ($(armthumb), off)
	GYPFLAGS += -Darm_thumb=0
	else
	ifeq ($(armthumb), on)
	GYPFLAGS += -Darm_thumb=1
	endif
	endif
	# arm_test_noprobe=on
	# With this flag set, by default v8 will only use features implied
	# by the compiler (no probe). This is done by modifying the default
	# values of enable_armv7, enable_vfp3, enable_32dregs and enable_neon.
	# Modifying these flags when launching v8 will enable the probing for
	# the specified values.
	ifeq ($(arm_test_noprobe), on)
	GYPFLAGS += -Darm_test_noprobe=on
	endif
	# Do not omit the frame pointer, needed for profiling with perf
	ifeq ($(no_omit_framepointer), on)
	GYPFLAGS += -Drelease_extra_cflags=-fno-omit-frame-pointer
	endif

	ifdef android_ndk_root
	GYPFLAGS += -Dandroid_ndk_root=$(android_ndk_root)
	export ANDROID_NDK_ROOT = $(android_ndk_root)
	endif

	# ----------------- available targets: --------------------
	# - any arch listed in ARCHES (see below)
	# - any mode listed in MODES
	# - every combination <arch>.<mode>, e.g. "ia32.release"
	# - "native": current host's architecture, release mode
	# - any of the above with .check appended, e.g. "ia32.release.check"
	# - "android": cross-compile for Android/ARM
	# - default (no target specified): build all DEFAULT_ARCHES and MODES
	# - "check": build all targets and run all tests
	# - "<arch>.clean" for any <arch> in ARCHES
	# - "clean": clean all ARCHES

	# ----------------- internal stuff ------------------------

	# Architectures and modes to be compiled. Consider these to be internal
	# variables, don't override them (use the targets instead).
	ARCHES = ia32 x64 arm arm64 mips mipsel mips64 mips64el ppc ppc64 s390 s390x
	ARCHES32 = ia32 arm mips mipsel ppc s390
	DEFAULT_ARCHES = ia32 x64 arm
	MODES = release debug optdebug
	DEFAULT_MODES = release debug
	ANDROID_ARCHES = android_ia32 android_x64 android_arm android_arm64 \
	android_mipsel

	# List of files that trigger Makefile regeneration:
	GYPFILES = third_party/icu/icu.gypi third_party/icu/icu.gyp \
	gypfiles/shim_headers.gypi gypfiles/features.gypi \
	gypfiles/standalone.gypi \
	gypfiles/toolchain.gypi gypfiles/all.gyp gypfiles/mac/asan.gyp \
	test/cctest/cctest.gyp test/fuzzer/fuzzer.gyp \
	test/unittests/unittests.gyp src/v8.gyp \
	tools/parser-shell.gyp testing/gmock.gyp testing/gtest.gyp \
	samples/samples.gyp src/third_party/vtune/v8vtune.gyp src/d8.gyp

	# If vtunejit=on, the v8vtune.gyp will be appended.
	ifeq ($(vtunejit), on)
	GYPFILES += src/third_party/vtune/v8vtune.gyp
	endif
	# Generates all combinations of ARCHES and MODES, e.g. "ia32.release".
	BUILDS = $(foreach mode,$(MODES),$(addsuffix .$(mode),$(ARCHES)))
	ANDROID_BUILDS = $(foreach mode,$(MODES), \
	$(addsuffix .$(mode),$(ANDROID_ARCHES)))
	# Generates corresponding test targets, e.g. "ia32.release.check".
	CHECKS = $(addsuffix .check,$(BUILDS))
	QUICKCHECKS = $(addsuffix .quickcheck,$(BUILDS))
	ANDROID_CHECKS = $(addsuffix .check,$(ANDROID_BUILDS))
	# File where previously used GYPFLAGS are stored.
	ENVFILE = $(OUTDIR)/environment

	.PHONY: all check clean builddeps dependencies $(ENVFILE).new native \
	qc quickcheck $(QUICKCHECKS) turbocheck \
	$(addsuffix .quickcheck,$(MODES)) $(addsuffix .quickcheck,$(ARCHES)) \
	$(ARCHES) $(MODES) $(BUILDS) $(CHECKS) $(addsuffix .clean,$(ARCHES)) \
	$(addsuffix .check,$(MODES)) $(addsuffix .check,$(ARCHES)) \
	$(ANDROID_ARCHES) $(ANDROID_BUILDS) $(ANDROID_CHECKS)

	# Target definitions. "all" is the default.
	all: $(DEFAULT_MODES)

	# Special target for the buildbots to use. Depends on $(OUTDIR)/Makefile
	# having been created before.
	buildbot:
	$(MAKE) -C "$(OUTDIR)" BUILDTYPE=$(BUILDTYPE) \
	builddir="$(abspath $(OUTDIR))/$(BUILDTYPE)"

	# Compile targets. MODES and ARCHES are convenience targets.
	.SECONDEXPANSION:
	$(MODES): $(addsuffix .$$@,$(DEFAULT_ARCHES))

	$(ARCHES): $(addprefix $$@.,$(DEFAULT_MODES))

	# Defines how to build a particular target (e.g. ia32.release).
	$(BUILDS): $(OUTDIR)/Makefile.$$@
	@$(MAKE) -C "$(OUTDIR)" -f Makefile.$@ \
	BUILDTYPE=$(shell echo $(subst .,,$(suffix $@)) \| \
	python -c "print \
	raw_input().replace('opt', '').capitalize()") \
	builddir="$(shell pwd)/$(OUTDIR)/$@"

	native: $(OUTDIR)/Makefile.native
	@$(MAKE) -C "$(OUTDIR)" -f Makefile.native \
	BUILDTYPE=Release \
	builddir="$(shell pwd)/$(OUTDIR)/$@"

	$(ANDROID_ARCHES): $(addprefix $$@.,$(MODES))

	$(ANDROID_BUILDS): $(GYPFILES) $(ENVFILE) Makefile.android
	@$(MAKE) -f Makefile.android $@ \
	ARCH="$(basename $@)" \
	MODE="$(subst .,,$(suffix $@))" \
	OUTDIR="$(OUTDIR)" \
	GYPFLAGS="$(GYPFLAGS)"

	# Test targets.
	check: all
	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--arch=$(shell echo $(DEFAULT_ARCHES) \| sed -e 's/ /,/g') \
	$(TESTFLAGS)

	$(addsuffix .check,$(MODES)): $$(basename $$@)
	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--mode=$(basename $@) $(TESTFLAGS)

	$(addsuffix .check,$(ARCHES)): $$(basename $$@)
	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--arch=$(basename $@) $(TESTFLAGS)

	$(CHECKS): $$(basename $$@)
	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--arch-and-mode=$(basename $@) $(TESTFLAGS)

	$(addsuffix .quickcheck,$(MODES)): $$(basename $$@)
	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--mode=$(basename $@) $(TESTFLAGS) --quickcheck

	$(addsuffix .quickcheck,$(ARCHES)): $$(basename $$@)
	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--arch=$(basename $@) $(TESTFLAGS) --quickcheck

	$(QUICKCHECKS): $$(basename $$@)
	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--arch-and-mode=$(basename $@) $(TESTFLAGS) --quickcheck

	$(addsuffix .sync, $(ANDROID_BUILDS)): $$(basename $$@)
	@tools/android-sync.sh $(basename $@) $(OUTDIR) \
	$(shell pwd) $(ANDROID_V8)

	$(addsuffix .check, $(ANDROID_BUILDS)): $$(basename $$@).sync
	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--arch-and-mode=$(basename $@) \
	--timeout=600 \
	--command-prefix="tools/android-run.py" $(TESTFLAGS)

	$(addsuffix .check, $(ANDROID_ARCHES)): \
	$(addprefix $$(basename $$@).,$(MODES)).check

	native.check: native
	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR)/native \
	--arch-and-mode=. $(TESTFLAGS)

	SUPERFASTTESTMODES = ia32.release
	FASTTESTMODES = $(SUPERFASTTESTMODES),x64.release,ia32.optdebug,x64.optdebug,arm.optdebug,arm64.release
	FASTCOMPILEMODES = $(FASTTESTMODES),arm64.optdebug

	COMMA = ,
	EMPTY =
	SPACE = $(EMPTY) $(EMPTY)
	quickcheck: $(subst $(COMMA),$(SPACE),$(FASTCOMPILEMODES))
	tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--arch-and-mode=$(SUPERFASTTESTMODES) $(TESTFLAGS) --quickcheck \
	--download-data mozilla webkit
	tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--arch-and-mode=$(FASTTESTMODES) $(TESTFLAGS) --quickcheck
	qc: quickcheck

	turbocheck: $(subst $(COMMA),$(SPACE),$(FASTCOMPILEMODES))
	tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--arch-and-mode=$(SUPERFASTTESTMODES) $(TESTFLAGS) \
	--quickcheck --variants=turbofan --download-data mozilla webkit
	tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
	--arch-and-mode=$(FASTTESTMODES) $(TESTFLAGS) \
	--quickcheck --variants=turbofan
	tc: turbocheck

	# Clean targets. You can clean each architecture individually, or everything.
	$(addsuffix .clean, $(ARCHES) $(ANDROID_ARCHES)):
	rm -f $(OUTDIR)/Makefile.$(basename $@)*
	rm -rf $(OUTDIR)/$(basename $@).release
	rm -rf $(OUTDIR)/$(basename $@).debug
	rm -rf $(OUTDIR)/$(basename $@).optdebug
	find $(OUTDIR) -regex '.\(host\\|target\)\.$(basename $@).\.mk' -delete

	native.clean:
	rm -f $(OUTDIR)/Makefile.native
	rm -rf $(OUTDIR)/native
	find $(OUTDIR) -regex '.*\(host\\|target\)\.native\.mk' -delete

	clean: $(addsuffix .clean, $(ARCHES) $(ANDROID_ARCHES)) native.clean gtags.clean tags.clean

	# GYP file generation targets.
	OUT_MAKEFILES = $(addprefix $(OUTDIR)/Makefile.,$(BUILDS))
	$(OUT_MAKEFILES): $(GYPFILES) $(ENVFILE)
	$(eval CXX_TARGET_ARCH:=$(shell $(CXX) -v 2>&1 \| grep ^Target: \| \
	cut -f 2 -d " " \| cut -f 1 -d "-" ))
	$(eval CXX_TARGET_ARCH:=$(subst aarch64,arm64,$(CXX_TARGET_ARCH)))
	$(eval CXX_TARGET_ARCH:=$(subst x86_64,x64,$(CXX_TARGET_ARCH)))
	$(eval CXX_TARGET_ARCH:=$(subst s390x,s390,$(CXX_TARGET_ARCH)))
	$(eval CXX_TARGET_ARCH:=$(subst powerpc,ppc,$(CXX_TARGET_ARCH)))
	$(eval CXX_TARGET_ARCH:=$(subst ppc64,ppc,$(CXX_TARGET_ARCH)))
	$(eval CXX_TARGET_ARCH:=$(subst ppcle,ppc,$(CXX_TARGET_ARCH)))
	$(eval V8_TARGET_ARCH:=$(subst .,,$(suffix $(basename $@))))
	PYTHONPATH="$(shell pwd)/tools/generate_shim_headers:$(shell pwd)/gypfiles:$(PYTHONPATH):$(shell pwd)/tools/gyp/pylib:$(PYTHONPATH)" \
	GYP_GENERATORS=make \
	tools/gyp/gyp --generator-output="$(OUTDIR)" gypfiles/all.gyp \
	-Igypfiles/standalone.gypi --depth=. \
	-Dv8_target_arch=$(V8_TARGET_ARCH) \
	$(if $(findstring $(CXX_TARGET_ARCH),$(V8_TARGET_ARCH)), \
	-Dtarget_arch=$(V8_TARGET_ARCH), \
	$(if $(shell echo $(ARCHES32) \| grep $(V8_TARGET_ARCH)), \
	-Dtarget_arch=ia32,)) \
	$(if $(findstring optdebug,$@),-Dv8_optimized_debug=1,) \
	-S$(suffix $(basename $@))$(suffix $@) $(GYPFLAGS)

	$(OUTDIR)/Makefile.native: $(GYPFILES) $(ENVFILE)
	PYTHONPATH="$(shell pwd)/tools/generate_shim_headers:$(shell pwd)/gypfiles:$(PYTHONPATH):$(shell pwd)/tools/gyp/pylib:$(PYTHONPATH)" \
	GYP_GENERATORS=make \
	tools/gyp/gyp --generator-output="$(OUTDIR)" gypfiles/all.gyp \
	-Igypfiles/standalone.gypi --depth=. -S.native $(GYPFLAGS)

	# Replaces the old with the new environment file if they're different, which
	# will trigger GYP to regenerate Makefiles.
	$(ENVFILE): $(ENVFILE).new
	@if test -r $(ENVFILE) && cmp $(ENVFILE).new $(ENVFILE) > /dev/null; \
	then rm $(ENVFILE).new; \
	else mv $(ENVFILE).new $(ENVFILE); fi

	# Stores current GYPFLAGS in a file.
	$(ENVFILE).new:
	$(eval CXX_TARGET_ARCH:=$(shell $(CXX) -v 2>&1 \| grep ^Target: \| \
	cut -f 2 -d " " \| cut -f 1 -d "-" ))
	$(eval CXX_TARGET_ARCH:=$(subst aarch64,arm64,$(CXX_TARGET_ARCH)))
	$(eval CXX_TARGET_ARCH:=$(subst x86_64,x64,$(CXX_TARGET_ARCH)))
	@mkdir -p $(OUTDIR); echo "GYPFLAGS=$(GYPFLAGS) -Dtarget_arch=$(CXX_TARGET_ARCH)" > $(ENVFILE).new;

	# Support for the GNU GLOBAL Source Code Tag System.
	gtags.files: $(GYPFILES) $(ENVFILE)
	@find include src test -name '.h' -o -name '.cc' -o -name '*.c' > $@

	# We need to manually set the stack limit here, to work around bugs in
	# gmake-3.81 and global-5.7.1 on recent 64-bit Linux systems.
	# Using $(wildcard ...) gracefully ignores non-existing files, so that stale
	# gtags.files after switching branches don't cause recipe failures.
	GPATH GRTAGS GSYMS GTAGS: gtags.files $(wildcard $(shell cat gtags.files 2> /dev/null))
	@bash -c 'ulimit -s 10240 && GTAGSFORCECPP=yes gtags -i -q -f $<'

	gtags.clean:
	rm -f gtags.files GPATH GRTAGS GSYMS GTAGS

	tags: gtags.files $(wildcard $(shell cat gtags.files 2> /dev/null))
	@(ctags --version \| grep 'Exuberant Ctags' >/dev/null) \|\| \
	(echo "Please install Exuberant Ctags (check 'ctags --version')" >&2; false)
	ctags --fields=+l -L $<

	tags.clean:
	rm -r tags

	dependencies builddeps:
	$(error Use 'gclient sync' instead)