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      1 # Copyright 2012 the V8 project authors. All rights reserved.
      2 # Redistribution and use in source and binary forms, with or without
      3 # modification, are permitted provided that the following conditions are
      4 # met:
      5 #
      6 #     * Redistributions of source code must retain the above copyright
      7 #       notice, this list of conditions and the following disclaimer.
      8 #     * Redistributions in binary form must reproduce the above
      9 #       copyright notice, this list of conditions and the following
     10 #       disclaimer in the documentation and/or other materials provided
     11 #       with the distribution.
     12 #     * Neither the name of Google Inc. nor the names of its
     13 #       contributors may be used to endorse or promote products derived
     14 #       from this software without specific prior written permission.
     15 #
     16 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 
     29 # Variable default definitions. Override them by exporting them in your shell.
     30 CXX ?= g++
     31 LINK ?= g++
     32 OUTDIR ?= out
     33 TESTJOBS ?=
     34 GYPFLAGS ?=
     35 TESTFLAGS ?=
     36 ANDROID_NDK_ROOT ?=
     37 ANDROID_NDK_HOST_ARCH ?=
     38 ANDROID_TOOLCHAIN ?=
     39 ANDROID_V8 ?= /data/local/tmp/v8
     40 NACL_SDK_ROOT ?=
     41 
     42 # Special build flags. Use them like this: "make library=shared"
     43 
     44 # library=shared || component=shared_library
     45 ifeq ($(library), shared)
     46   GYPFLAGS += -Dcomponent=shared_library
     47 endif
     48 ifdef component
     49   GYPFLAGS += -Dcomponent=$(component)
     50 endif
     51 # console=readline
     52 ifdef console
     53   GYPFLAGS += -Dconsole=$(console)
     54 endif
     55 # disassembler=on
     56 ifeq ($(disassembler), on)
     57   GYPFLAGS += -Dv8_enable_disassembler=1
     58 endif
     59 # objectprint=on
     60 ifeq ($(objectprint), on)
     61   GYPFLAGS += -Dv8_object_print=1
     62 endif
     63 # verifyheap=on
     64 ifeq ($(verifyheap), on)
     65   GYPFLAGS += -Dv8_enable_verify_heap=1
     66 endif
     67 # backtrace=off
     68 ifeq ($(backtrace), off)
     69   GYPFLAGS += -Dv8_enable_backtrace=0
     70 else
     71   GYPFLAGS += -Dv8_enable_backtrace=1
     72 endif
     73 # snapshot=off
     74 ifeq ($(snapshot), off)
     75   GYPFLAGS += -Dv8_use_snapshot='false'
     76 endif
     77 # extrachecks=on/off
     78 ifeq ($(extrachecks), on)
     79   GYPFLAGS += -Dv8_enable_extra_checks=1 -Dv8_enable_handle_zapping=1
     80 endif
     81 ifeq ($(extrachecks), off)
     82   GYPFLAGS += -Dv8_enable_extra_checks=0 -Dv8_enable_handle_zapping=0
     83 endif
     84 # gdbjit=on/off
     85 ifeq ($(gdbjit), on)
     86   GYPFLAGS += -Dv8_enable_gdbjit=1
     87 endif
     88 ifeq ($(gdbjit), off)
     89   GYPFLAGS += -Dv8_enable_gdbjit=0
     90 endif
     91 # vtunejit=on
     92 ifeq ($(vtunejit), on)
     93   GYPFLAGS += -Dv8_enable_vtunejit=1
     94 endif
     95 # optdebug=on
     96 ifeq ($(optdebug), on)
     97   GYPFLAGS += -Dv8_optimized_debug=2
     98 endif
     99 # unalignedaccess=on
    100 ifeq ($(unalignedaccess), on)
    101   GYPFLAGS += -Dv8_can_use_unaligned_accesses=true
    102 endif
    103 # randomseed=12345, disable random seed via randomseed=0
    104 ifdef randomseed
    105   GYPFLAGS += -Dv8_random_seed=$(randomseed)
    106 endif
    107 # soname_version=1.2.3
    108 ifdef soname_version
    109   GYPFLAGS += -Dsoname_version=$(soname_version)
    110 endif
    111 # werror=no
    112 ifeq ($(werror), no)
    113   GYPFLAGS += -Dwerror=''
    114 endif
    115 # presubmit=no
    116 ifeq ($(presubmit), no)
    117   TESTFLAGS += --no-presubmit
    118 endif
    119 # strictaliasing=off (workaround for GCC-4.5)
    120 ifeq ($(strictaliasing), off)
    121   GYPFLAGS += -Dv8_no_strict_aliasing=1
    122 endif
    123 # regexp=interpreted
    124 ifeq ($(regexp), interpreted)
    125   GYPFLAGS += -Dv8_interpreted_regexp=1
    126 endif
    127 # i18nsupport=off
    128 ifeq ($(i18nsupport), off)
    129   GYPFLAGS += -Dv8_enable_i18n_support=0
    130   TESTFLAGS += --noi18n
    131 endif
    132 # deprecation_warnings=on
    133 ifeq ($(deprecationwarnings), on)
    134   GYPFLAGS += -Dv8_deprecation_warnings=1
    135 endif
    136 # asan=/path/to/clang++
    137 ifneq ($(strip $(asan)),)
    138   GYPFLAGS += -Dasan=1
    139   export CXX=$(asan)
    140   export CXX_host=$(asan)
    141   export LINK=$(asan)
    142   export ASAN_SYMBOLIZER_PATH="$(dir $(asan))llvm-symbolizer"
    143 endif
    144 
    145 # arm specific flags.
    146 # arm_version=<number | "default">
    147 ifneq ($(strip $(arm_version)),)
    148   GYPFLAGS += -Darm_version=$(arm_version)
    149 else
    150 # Deprecated (use arm_version instead): armv7=false/true
    151 ifeq ($(armv7), false)
    152   GYPFLAGS += -Darm_version=6
    153 else
    154 ifeq ($(armv7), true)
    155   GYPFLAGS += -Darm_version=7
    156 endif
    157 endif
    158 endif
    159 # hardfp=on/off. Deprecated, use armfloatabi
    160 ifeq ($(hardfp),on)
    161   GYPFLAGS += -Darm_float_abi=hard
    162 else
    163 ifeq ($(hardfp),off)
    164   GYPFLAGS += -Darm_float_abi=softfp
    165 endif
    166 endif
    167 # fpu: armfpu=xxx
    168 # xxx: vfp, vfpv3-d16, vfpv3, neon.
    169 ifeq ($(armfpu),)
    170   GYPFLAGS += -Darm_fpu=default
    171 else
    172   GYPFLAGS += -Darm_fpu=$(armfpu)
    173 endif
    174 # float abi: armfloatabi=softfp/hard
    175 ifeq ($(armfloatabi),)
    176 ifeq ($(hardfp),)
    177   GYPFLAGS += -Darm_float_abi=default
    178 endif
    179 else
    180   GYPFLAGS += -Darm_float_abi=$(armfloatabi)
    181 endif
    182 # armthumb=on/off
    183 ifeq ($(armthumb), off)
    184   GYPFLAGS += -Darm_thumb=0
    185 else
    186 ifeq ($(armthumb), on)
    187   GYPFLAGS += -Darm_thumb=1
    188 endif
    189 endif
    190 # armtest=on
    191 # With this flag set, by default v8 will only use features implied
    192 # by the compiler (no probe). This is done by modifying the default
    193 # values of enable_armv7, enable_vfp3, enable_32dregs and enable_neon.
    194 # Modifying these flags when launching v8 will enable the probing for
    195 # the specified values.
    196 # When using the simulator, this flag is implied.
    197 ifeq ($(armtest), on)
    198   GYPFLAGS += -Darm_test=on
    199 endif
    200 
    201 # ----------------- available targets: --------------------
    202 # - "dependencies": pulls in external dependencies (currently: GYP)
    203 # - "grokdump": rebuilds heap constants lists used by grokdump
    204 # - any arch listed in ARCHES (see below)
    205 # - any mode listed in MODES
    206 # - every combination <arch>.<mode>, e.g. "ia32.release"
    207 # - "native": current host's architecture, release mode
    208 # - any of the above with .check appended, e.g. "ia32.release.check"
    209 # - "android": cross-compile for Android/ARM
    210 # - "nacl" : cross-compile for Native Client (ia32 and x64)
    211 # - default (no target specified): build all DEFAULT_ARCHES and MODES
    212 # - "check": build all targets and run all tests
    213 # - "<arch>.clean" for any <arch> in ARCHES
    214 # - "clean": clean all ARCHES
    215 
    216 # ----------------- internal stuff ------------------------
    217 
    218 # Architectures and modes to be compiled. Consider these to be internal
    219 # variables, don't override them (use the targets instead).
    220 ARCHES = ia32 x64 arm arm64 mips mipsel x87
    221 DEFAULT_ARCHES = ia32 x64 arm
    222 MODES = release debug optdebug
    223 DEFAULT_MODES = release debug
    224 ANDROID_ARCHES = android_ia32 android_arm android_arm64 android_mipsel android_x87
    225 NACL_ARCHES = nacl_ia32 nacl_x64
    226 
    227 # List of files that trigger Makefile regeneration:
    228 GYPFILES = build/all.gyp build/features.gypi build/standalone.gypi \
    229            build/toolchain.gypi samples/samples.gyp src/d8.gyp \
    230            test/cctest/cctest.gyp tools/gyp/v8.gyp
    231 
    232 # If vtunejit=on, the v8vtune.gyp will be appended.
    233 ifeq ($(vtunejit), on)
    234   GYPFILES += src/third_party/vtune/v8vtune.gyp
    235 endif
    236 # Generates all combinations of ARCHES and MODES, e.g. "ia32.release".
    237 BUILDS = $(foreach mode,$(MODES),$(addsuffix .$(mode),$(ARCHES)))
    238 ANDROID_BUILDS = $(foreach mode,$(MODES), \
    239                    $(addsuffix .$(mode),$(ANDROID_ARCHES)))
    240 NACL_BUILDS = $(foreach mode,$(MODES), \
    241                    $(addsuffix .$(mode),$(NACL_ARCHES)))
    242 # Generates corresponding test targets, e.g. "ia32.release.check".
    243 CHECKS = $(addsuffix .check,$(BUILDS))
    244 QUICKCHECKS = $(addsuffix .quickcheck,$(BUILDS))
    245 ANDROID_CHECKS = $(addsuffix .check,$(ANDROID_BUILDS))
    246 NACL_CHECKS = $(addsuffix .check,$(NACL_BUILDS))
    247 # File where previously used GYPFLAGS are stored.
    248 ENVFILE = $(OUTDIR)/environment
    249 
    250 .PHONY: all check clean dependencies $(ENVFILE).new native \
    251         qc quickcheck $(QUICKCHECKS) \
    252         $(addsuffix .quickcheck,$(MODES)) $(addsuffix .quickcheck,$(ARCHES)) \
    253         $(ARCHES) $(MODES) $(BUILDS) $(CHECKS) $(addsuffix .clean,$(ARCHES)) \
    254         $(addsuffix .check,$(MODES)) $(addsuffix .check,$(ARCHES)) \
    255         $(ANDROID_ARCHES) $(ANDROID_BUILDS) $(ANDROID_CHECKS) \
    256         must-set-ANDROID_NDK_ROOT_OR_TOOLCHAIN \
    257         $(NACL_ARCHES) $(NACL_BUILDS) $(NACL_CHECKS) \
    258         must-set-NACL_SDK_ROOT
    259 
    260 # Target definitions. "all" is the default.
    261 all: $(DEFAULT_MODES)
    262 
    263 # Special target for the buildbots to use. Depends on $(OUTDIR)/Makefile
    264 # having been created before.
    265 buildbot:
    266 	$(MAKE) -C "$(OUTDIR)" BUILDTYPE=$(BUILDTYPE) \
    267 	        builddir="$(abspath $(OUTDIR))/$(BUILDTYPE)"
    268 
    269 # Compile targets. MODES and ARCHES are convenience targets.
    270 .SECONDEXPANSION:
    271 $(MODES): $(addsuffix .$$@,$(DEFAULT_ARCHES))
    272 
    273 $(ARCHES): $(addprefix $$@.,$(DEFAULT_MODES))
    274 
    275 # Defines how to build a particular target (e.g. ia32.release).
    276 $(BUILDS): $(OUTDIR)/Makefile.$$@
    277 	@$(MAKE) -C "$(OUTDIR)" -f Makefile.$@ \
    278 	         CXX="$(CXX)" LINK="$(LINK)" \
    279 	         BUILDTYPE=$(shell echo $(subst .,,$(suffix $@)) | \
    280 	                     python -c "print \
    281 	                     raw_input().replace('opt', '').capitalize()") \
    282 	         builddir="$(shell pwd)/$(OUTDIR)/$@"
    283 
    284 native: $(OUTDIR)/Makefile.native
    285 	@$(MAKE) -C "$(OUTDIR)" -f Makefile.native \
    286 	         CXX="$(CXX)" LINK="$(LINK)" BUILDTYPE=Release \
    287 	         builddir="$(shell pwd)/$(OUTDIR)/$@"
    288 
    289 $(ANDROID_ARCHES): $(addprefix $$@.,$(MODES))
    290 
    291 $(ANDROID_BUILDS): $(GYPFILES) $(ENVFILE) build/android.gypi \
    292                    must-set-ANDROID_NDK_ROOT_OR_TOOLCHAIN Makefile.android
    293 	@$(MAKE) -f Makefile.android $@ \
    294 	        ARCH="$(basename $@)" \
    295 	        MODE="$(subst .,,$(suffix $@))" \
    296 	        OUTDIR="$(OUTDIR)" \
    297 	        GYPFLAGS="$(GYPFLAGS)"
    298 
    299 $(NACL_ARCHES): $(addprefix $$@.,$(MODES))
    300 
    301 $(NACL_BUILDS): $(GYPFILES) $(ENVFILE) \
    302 		   Makefile.nacl must-set-NACL_SDK_ROOT
    303 	@$(MAKE) -f Makefile.nacl $@ \
    304 	        ARCH="$(basename $@)" \
    305 	        MODE="$(subst .,,$(suffix $@))" \
    306 	        OUTDIR="$(OUTDIR)" \
    307 	        GYPFLAGS="$(GYPFLAGS)"
    308 
    309 # Test targets.
    310 check: all
    311 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    312 	    --arch=$(shell echo $(DEFAULT_ARCHES) | sed -e 's/ /,/g') \
    313 	    $(TESTFLAGS)
    314 
    315 $(addsuffix .check,$(MODES)): $$(basename $$@)
    316 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    317 	    --mode=$(basename $@) $(TESTFLAGS)
    318 
    319 $(addsuffix .check,$(ARCHES)): $$(basename $$@)
    320 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    321 	    --arch=$(basename $@) $(TESTFLAGS)
    322 
    323 $(CHECKS): $$(basename $$@)
    324 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    325 	    --arch-and-mode=$(basename $@) $(TESTFLAGS)
    326 
    327 $(addsuffix .quickcheck,$(MODES)): $$(basename $$@)
    328 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    329 	    --mode=$(basename $@) $(TESTFLAGS) --quickcheck
    330 
    331 $(addsuffix .quickcheck,$(ARCHES)): $$(basename $$@)
    332 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    333 	    --arch=$(basename $@) $(TESTFLAGS) --quickcheck
    334 
    335 $(QUICKCHECKS): $$(basename $$@)
    336 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    337 	    --arch-and-mode=$(basename $@) $(TESTFLAGS) --quickcheck
    338 
    339 $(addsuffix .sync, $(ANDROID_BUILDS)): $$(basename $$@)
    340 	@tools/android-sync.sh $(basename $@) $(OUTDIR) \
    341 	                       $(shell pwd) $(ANDROID_V8)
    342 
    343 $(addsuffix .check, $(ANDROID_BUILDS)): $$(basename $$@).sync
    344 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    345 	     --arch-and-mode=$(basename $@) \
    346 	     --timeout=600 \
    347 	     --command-prefix="tools/android-run.py" $(TESTFLAGS)
    348 
    349 $(addsuffix .check, $(ANDROID_ARCHES)): \
    350                 $(addprefix $$(basename $$@).,$(MODES)).check
    351 
    352 $(addsuffix .check, $(NACL_BUILDS)): $$(basename $$@)
    353 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    354 	     --arch-and-mode=$(basename $@) \
    355 	     --timeout=600 --nopresubmit --noi18n \
    356 	     --command-prefix="tools/nacl-run.py"
    357 
    358 $(addsuffix .check, $(NACL_ARCHES)): \
    359                 $(addprefix $$(basename $$@).,$(MODES)).check
    360 
    361 native.check: native
    362 	@tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR)/native \
    363 	    --arch-and-mode=. $(TESTFLAGS)
    364 
    365 SUPERFASTTESTMODES = ia32.release
    366 FASTTESTMODES = $(SUPERFASTTESTMODES),x64.release,ia32.optdebug,x64.optdebug,arm.optdebug,arm64.release
    367 FASTCOMPILEMODES = $(FASTTESTMODES),arm64.optdebug
    368 
    369 COMMA = ,
    370 EMPTY =
    371 SPACE = $(EMPTY) $(EMPTY)
    372 quickcheck: $(subst $(COMMA),$(SPACE),$(FASTCOMPILEMODES))
    373 	tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    374 	    --arch-and-mode=$(SUPERFASTTESTMODES) $(TESTFLAGS) --quickcheck \
    375 	    --download-data mozilla webkit
    376 	tools/run-tests.py $(TESTJOBS) --outdir=$(OUTDIR) \
    377 	    --arch-and-mode=$(FASTTESTMODES) $(TESTFLAGS) --quickcheck
    378 qc: quickcheck
    379 
    380 # Clean targets. You can clean each architecture individually, or everything.
    381 $(addsuffix .clean, $(ARCHES) $(ANDROID_ARCHES) $(NACL_ARCHES)):
    382 	rm -f $(OUTDIR)/Makefile.$(basename $@)*
    383 	rm -rf $(OUTDIR)/$(basename $@).release
    384 	rm -rf $(OUTDIR)/$(basename $@).debug
    385 	rm -rf $(OUTDIR)/$(basename $@).optdebug
    386 	find $(OUTDIR) -regex '.*\(host\|target\)\.$(basename $@).*\.mk' -delete
    387 
    388 native.clean:
    389 	rm -f $(OUTDIR)/Makefile.native
    390 	rm -rf $(OUTDIR)/native
    391 	find $(OUTDIR) -regex '.*\(host\|target\)\.native\.mk' -delete
    392 
    393 clean: $(addsuffix .clean, $(ARCHES) $(ANDROID_ARCHES) $(NACL_ARCHES)) native.clean gtags.clean
    394 
    395 # GYP file generation targets.
    396 OUT_MAKEFILES = $(addprefix $(OUTDIR)/Makefile.,$(BUILDS))
    397 $(OUT_MAKEFILES): $(GYPFILES) $(ENVFILE)
    398 	PYTHONPATH="$(shell pwd)/tools/generate_shim_headers:$(PYTHONPATH)" \
    399 	PYTHONPATH="$(shell pwd)/build/gyp/pylib:$(PYTHONPATH)" \
    400 	GYP_GENERATORS=make \
    401 	build/gyp/gyp --generator-output="$(OUTDIR)" build/all.gyp \
    402 	              -Ibuild/standalone.gypi --depth=. \
    403 	              -Dv8_target_arch=$(subst .,,$(suffix $(basename $@))) \
    404 	              $(if $(findstring optdebug,$@),-Dv8_optimized_debug=2,) \
    405 	              -S$(suffix $(basename $@))$(suffix $@) $(GYPFLAGS)
    406 
    407 $(OUTDIR)/Makefile.native: $(GYPFILES) $(ENVFILE)
    408 	PYTHONPATH="$(shell pwd)/tools/generate_shim_headers:$(PYTHONPATH)" \
    409 	PYTHONPATH="$(shell pwd)/build/gyp/pylib:$(PYTHONPATH)" \
    410 	GYP_GENERATORS=make \
    411 	build/gyp/gyp --generator-output="$(OUTDIR)" build/all.gyp \
    412 	              -Ibuild/standalone.gypi --depth=. -S.native $(GYPFLAGS)
    413 
    414 must-set-ANDROID_NDK_ROOT_OR_TOOLCHAIN:
    415 ifndef ANDROID_NDK_ROOT
    416 ifndef ANDROID_TOOLCHAIN
    417 	  $(error ANDROID_NDK_ROOT or ANDROID_TOOLCHAIN must be set))
    418 endif
    419 endif
    420 
    421 # Note that NACL_SDK_ROOT must be set to point to an appropriate
    422 # Native Client SDK before using this makefile. You can download
    423 # an SDK here:
    424 #   https://developers.google.com/native-client/sdk/download
    425 # The path indicated by NACL_SDK_ROOT will typically end with
    426 # a folder for a pepper version such as "pepper_25" that should
    427 # have "tools" and "toolchain" subdirectories.
    428 must-set-NACL_SDK_ROOT:
    429 ifndef NACL_SDK_ROOT
    430 	  $(error NACL_SDK_ROOT must be set)
    431 endif
    432 
    433 # Replaces the old with the new environment file if they're different, which
    434 # will trigger GYP to regenerate Makefiles.
    435 $(ENVFILE): $(ENVFILE).new
    436 	@if test -r $(ENVFILE) && cmp $(ENVFILE).new $(ENVFILE) > /dev/null; \
    437 	    then rm $(ENVFILE).new; \
    438 	    else mv $(ENVFILE).new $(ENVFILE); fi
    439 
    440 # Stores current GYPFLAGS in a file.
    441 $(ENVFILE).new:
    442 	@mkdir -p $(OUTDIR); echo "GYPFLAGS=$(GYPFLAGS)" > $(ENVFILE).new; \
    443 	    echo "CXX=$(CXX)" >> $(ENVFILE).new
    444 
    445 # Heap constants for grokdump.
    446 DUMP_FILE = tools/v8heapconst.py
    447 grokdump: ia32.release
    448 	@cat $(DUMP_FILE).tmpl > $(DUMP_FILE)
    449 	@$(OUTDIR)/ia32.release/d8 --dump-heap-constants >> $(DUMP_FILE)
    450 
    451 # Support for the GNU GLOBAL Source Code Tag System.
    452 gtags.files: $(GYPFILES) $(ENVFILE)
    453 	@find include src test -name '*.h' -o -name '*.cc' -o -name '*.c' > $@
    454 
    455 # We need to manually set the stack limit here, to work around bugs in
    456 # gmake-3.81 and global-5.7.1 on recent 64-bit Linux systems.
    457 GPATH GRTAGS GSYMS GTAGS: gtags.files $(shell cat gtags.files 2> /dev/null)
    458 	@bash -c 'ulimit -s 10240 && GTAGSFORCECPP=yes gtags -i -q -f $<'
    459 
    460 gtags.clean:
    461 	rm -f gtags.files GPATH GRTAGS GSYMS GTAGS
    462 
    463 # Dependencies.
    464 # Remember to keep these in sync with the DEPS file.
    465 dependencies:
    466 	svn checkout --force http://gyp.googlecode.com/svn/trunk build/gyp \
    467 	    --revision 1831
    468 	svn checkout --force \
    469 	    https://src.chromium.org/chrome/trunk/deps/third_party/icu46 \
    470 	    third_party/icu --revision 258359
    471 	( test -d buildtools || \
    472 	  git clone https://chromium.googlesource.com/chromium/buildtools.git; \
    473 	  cd buildtools; \
    474 	  git fetch origin; \
    475 	  git checkout 5d89977ce55240995d1596fe420b818468f5ec37 )
    476